ecos: packages/io/serial/current/src/common/serial.c annotate

annotate packages/io/serial/current/src/common/serial.c @ 128:0c2b7be0d798 ecos-sw-2000-10-12

Merge from eCos master repository on 2000-10-12-08:46:24-BST

author	jlarmour
date	Thu, 12 Oct 2000 20:31:43 +0000
parents	6ed91473a1cd
children	eb9fd8c04db3

rev	line source
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	1 //==========================================================================
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	2 //
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	3 // io/serial/common/serial.c
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	4 //
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	5 // High level serial driver
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	6 //
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	7 //==========================================================================
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	8 //####COPYRIGHTBEGIN####
64 c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	9 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	10 // -------------------------------------------
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	11 // The contents of this file are subject to the Red Hat eCos Public License
66 bf00f99aec69 Merge from eCos master repository on 2000-02-02-19:16:44-GMT jlarmour parents: 64 diff changeset	12 // Version 1.1 (the "License"); you may not use this file except in
64 c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	13 // compliance with the License. You may obtain a copy of the License at
66 bf00f99aec69 Merge from eCos master repository on 2000-02-02-19:16:44-GMT jlarmour parents: 64 diff changeset	14 // http://www.redhat.com/
64 c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	15 //
66 bf00f99aec69 Merge from eCos master repository on 2000-02-02-19:16:44-GMT jlarmour parents: 64 diff changeset	16 // Software distributed under the License is distributed on an "AS IS"
64 c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	18 // License for the specific language governing rights and limitations under
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	19 // the License.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	20 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	21 // The Original Code is eCos - Embedded Configurable Operating System,
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	22 // released September 30, 1998.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	23 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	24 // The Initial Developer of the Original Code is Red Hat.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	25 // Portions created by Red Hat are
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	27 // All Rights Reserved.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	28 // -------------------------------------------
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT jlarmour parents: 62 diff changeset	29 //
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	30 //####COPYRIGHTEND####
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	31 //==========================================================================
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	32 //#####DESCRIPTIONBEGIN####
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	33 //
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	34 // Author(s): gthomas
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	35 // Contributors: gthomas, grante, jlarmour, jskov
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	36 // Date: 1999-02-04
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	37 // Purpose: Top level serial driver
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	38 // Description:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	39 //
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	40 //####DESCRIPTIONEND####
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	41 //
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	42 //==========================================================================
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	43
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	44 #include <pkgconf/io.h>
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	45 #include <pkgconf/io_serial.h>
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	46
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	47 #include <cyg/io/io.h>
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	48 #include <cyg/io/devtab.h>
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	49 #include <cyg/io/serial.h>
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	50 #include <cyg/infra/diag.h>
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	51
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	52 static Cyg_ErrNo serial_write(cyg_io_handle_t handle, const void buf, cyg_uint32 len);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	53 static Cyg_ErrNo serial_read(cyg_io_handle_t handle, void buf, cyg_uint32 len);
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	54 static Cyg_ErrNo serial_select(cyg_io_handle_t handle, cyg_uint32 which, CYG_ADDRWORD info);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	55 static Cyg_ErrNo serial_get_config(cyg_io_handle_t handle, cyg_uint32 key, void buf, cyg_uint32 len);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	56 static Cyg_ErrNo serial_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void buf, cyg_uint32 len);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	57
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 20 diff changeset	58 DEVIO_TABLE(cyg_io_serial_devio,
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	59 serial_write,
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	60 serial_read,
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	61 serial_select,
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	62 serial_get_config,
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	63 serial_set_config
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	64 );
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	65
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	66 static void serial_init(serial_channel *chan);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	67 static void serial_xmt_char(serial_channel *chan);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	68 static void serial_rcv_char(serial_channel *chan, unsigned char c);
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	69 #ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	70 static void serial_indicate_status(serial_channel *chan,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	71 cyg_serial_line_status_t *s);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	72 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	73 #if CYGINT_IO_SERIAL_BLOCK_TRANSFER
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	74 static rcv_req_reply_t serial_data_rcv_req(serial_channel *chan, int avail,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	75 int* space_avail,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	76 unsigned char** space);
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	77 static void serial_data_rcv_done(serial_channel *chan, int chars_rcvd);
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	78 static xmt_req_reply_t serial_data_xmt_req(serial_channel *chan, int space,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	79 int* chars_avail,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	80 unsigned char** chars);
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	81 static void serial_data_xmt_done(serial_channel *chan, int chars_sent);
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	82 # ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_HW
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	83 SERIAL_CALLBACKS(cyg_io_serial_callbacks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	84 serial_init,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	85 serial_xmt_char,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	86 serial_rcv_char,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	87 serial_data_rcv_req,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	88 serial_data_rcv_done,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	89 serial_data_xmt_req,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	90 serial_data_xmt_done,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	91 serial_indicate_status);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	92
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	93 # else
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	94 SERIAL_CALLBACKS(cyg_io_serial_callbacks,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	95 serial_init,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	96 serial_xmt_char,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	97 serial_rcv_char,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	98 serial_data_rcv_req,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	99 serial_data_rcv_done,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	100 serial_data_xmt_req,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	101 serial_data_xmt_done);
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	102 # endif
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	103 #else
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	104 # ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	105 SERIAL_CALLBACKS(cyg_io_serial_callbacks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	106 serial_init,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	107 serial_xmt_char,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	108 serial_rcv_char,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	109 serial_indicate_status);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	110 # else
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 20 diff changeset	111 SERIAL_CALLBACKS(cyg_io_serial_callbacks,
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	112 serial_init,
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	113 serial_xmt_char,
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	114 serial_rcv_char);
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	115 # endif
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	116 #endif
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	117
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	118 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	119
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	120 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	121
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	122 static __inline__ void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	123 throttle_tx( serial_channel *chan )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	124 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	125 chan->flow_desc.flags \|= CYG_SERIAL_FLOW_OUT_THROTTLED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	126 // the throttling itself occurs in the serial_xmt_char() callback
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	127 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	128
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	129 static __inline__ void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	130 restart_tx( serial_channel *chan )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	131 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	132 serial_funs *funs = chan->funs;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	133
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	134 chan->flow_desc.flags &= ~CYG_SERIAL_FLOW_OUT_THROTTLED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	135
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	136 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	137 // See if there is now enough room to say it is available
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	138 // for writing
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	139 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	140 cbuf_t *cbuf = &chan->out_cbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	141 int space;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	142
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	143 space = cbuf->len - cbuf->nb;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	144 if (space >= cbuf->low_water)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	145 cyg_selwakeup( &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	146 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	147 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	148 if ( chan->out_cbuf.nb > 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	149 (funs->start_xmit)(chan);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	150 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	151
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	152 static __inline__ void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	153 throttle_rx( serial_channel *chan, cyg_bool force )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	154 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	155 serial_funs *funs = chan->funs;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	156
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	157 chan->flow_desc.flags \|= CYG_SERIAL_FLOW_IN_THROTTLED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	158 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	159 // send an xoff
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	160 if ( force \|\| chan->config.flags & CYGNUM_SERIAL_FLOW_XONXOFF_RX ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	161 chan->flow_desc.xchar = CYGDAT_IO_SERIAL_FLOW_CONTROL_XOFF_CHAR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	162 // Make sure xmit is running so we can send it
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	163 (funs->start_xmit)(chan);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	164 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	165 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	166 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_HW
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	167 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	168 cyg_uint32 i=1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	169 cyg_uint32 len = sizeof(i);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	170
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	171 // set hardware flow control - don't care if it fails
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	172 if ( force \|\| (chan->config.flags & CYGNUM_SERIAL_FLOW_RTSCTS_RX) \|\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	173 (chan->config.flags & CYGNUM_SERIAL_FLOW_DSRDTR_RX) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	174 (funs->set_config)(chan,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	175 CYG_IO_SET_CONFIG_SERIAL_HW_RX_FLOW_THROTTLE,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	176 &i, &len);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	177 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	178 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	179 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	180
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	181 static __inline__ void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	182 restart_rx( serial_channel *chan, cyg_bool force )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	183 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	184 serial_funs *funs = chan->funs;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	185
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	186 chan->flow_desc.flags &= ~CYG_SERIAL_FLOW_IN_THROTTLED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	187 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	188 // send an xon
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	189 if ( force \|\| chan->config.flags & CYGNUM_SERIAL_FLOW_XONXOFF_RX ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	190 chan->flow_desc.xchar = CYGDAT_IO_SERIAL_FLOW_CONTROL_XON_CHAR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	191 (funs->start_xmit)(chan); // Make sure xmit is running so we can send it
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	192 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	193 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	194 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_HW
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	195 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	196 cyg_uint32 i=0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	197 cyg_uint32 len = sizeof(i);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	198
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	199 // set hardware flow control - don't care if it fails
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	200 if ( force \|\| (chan->config.flags & CYGNUM_SERIAL_FLOW_RTSCTS_RX) \|\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	201 (chan->config.flags & CYGNUM_SERIAL_FLOW_DSRDTR_RX) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	202 (funs->set_config)(chan,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	203 CYG_IO_SET_CONFIG_SERIAL_HW_RX_FLOW_THROTTLE,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	204 &i, &len);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	205 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	206 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	207 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	208
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	209 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	210
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	211 // ---------------------------------------------------------------------------
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	212
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	213 static void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	214 serial_init(serial_channel *chan)
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	215 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	216 if (chan->init) return;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	217 if (chan->out_cbuf.len != 0) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	218 #ifdef CYGDBG_IO_INIT
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	219 diag_printf("Set output buffer - buf: %x len: %d\n", chan->out_cbuf.data, chan->out_cbuf.len);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	220 #endif
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	221 chan->out_cbuf.waiting = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	222 chan->out_cbuf.abort = false;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	223 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	224 chan->out_cbuf.blocking = true;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	225 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	226 chan->out_cbuf.pending = 0;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	227 cyg_drv_mutex_init(&chan->out_cbuf.lock);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	228 cyg_drv_cond_init(&chan->out_cbuf.wait, &chan->out_cbuf.lock);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	229 chan->out_cbuf.low_water = chan->out_cbuf.len / 4;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	230 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	231 cyg_selinit( &chan->out_cbuf.selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	232 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	233 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	234 if (chan->in_cbuf.len != 0) {
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	235 cbuf_t *cbuf = &chan->in_cbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	236
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	237 #ifdef CYGDBG_IO_INIT
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	238 diag_printf("Set input buffer - buf: %x len: %d\n", cbuf->data, cbuf->len);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	239 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	240 cbuf->waiting = false;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	241 cbuf->abort = false;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	242 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	243 cbuf->blocking = true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	244 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	245 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	246 cyg_selinit( &cbuf->selinfo );
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	247 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	248 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	249 cbuf->low_water =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	250 (CYGNUM_IO_SERIAL_FLOW_CONTROL_LOW_WATER_PERCENT * cbuf->len) / 100;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	251 cbuf->high_water =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	252 (CYGNUM_IO_SERIAL_FLOW_CONTROL_HIGH_WATER_PERCENT * cbuf->len) / 100;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	253 # ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	254 // But make sure it is at least 35 below buffer size, to allow
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	255 // for 16 byte fifos, twice, plus some latency before s/w flow
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	256 // control can kick in. This doesn't apply to h/w flow control
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	257 // as it is near-instaneous
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	258 if ( (cbuf->len - cbuf->high_water) < 35 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	259 cbuf->high_water = cbuf->len - 35;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	260 // and just in case...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	261 if ( cbuf->high_water <= 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	262 cbuf->high_water = 1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	263 if ( cbuf->low_water > cbuf->high_water )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	264 cbuf->low_water = cbuf->high_water;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	265 # endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	266 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	267 cyg_drv_mutex_init(&cbuf->lock);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	268 cyg_drv_cond_init(&cbuf->wait, &cbuf->lock);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	269 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	270 #ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	271 chan->status_callback = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	272 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	273
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	274 #ifdef CYGDBG_USE_ASSERTS
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	275 #ifdef CYGINT_IO_SERIAL_BLOCK_TRANSFER
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	276 chan->in_cbuf.block_mode_xfer_running = false;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	277 chan->out_cbuf.block_mode_xfer_running = false;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	278 #endif // CYGINT_IO_SERIAL_BLOCK_TRANSFER
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	279 #endif // CYGDBG_USE_ASSERTS
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	280 chan->init = true;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	281 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	282
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	283 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	284 // FIXME:@@@ Throughout this file there are uses of cyg_drv_cond_signal and
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	285 // cyg_drv_cond_broadcast. Does it matter which? -Jifl
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	286
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	287 static Cyg_ErrNo
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	288 serial_write(cyg_io_handle_t handle, const void _buf, cyg_uint32 len)
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	289 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	290 cyg_devtab_entry_t t = (cyg_devtab_entry_t )handle;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	291 serial_channel chan = (serial_channel )t->priv;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	292 serial_funs *funs = chan->funs;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	293 cyg_int32 size = *len;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	294 cyg_uint8 buf = (cyg_uint8 )_buf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	295 int next;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	296 cbuf_t *cbuf = &chan->out_cbuf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	297 Cyg_ErrNo res = ENOERR;
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	298
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	299 cyg_drv_mutex_lock(&cbuf->lock);
4 1d7f19c9e4d1 Merge from eCos master repository on 1999-05-11-21:11:10-BST jlarmour parents: 2 diff changeset	300 cbuf->abort = false;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	301
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	302 if (cbuf->len == 0) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	303 // Non interrupt driven (i.e. polled) operation
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	304 while (size-- > 0) {
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	305 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	306 while ( ( 0 == (chan->flow_desc.flags & CYG_SERIAL_FLOW_OUT_THROTTLED) ) &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	307 ((funs->putc)(chan, *buf) == false) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	308 ; // Ignore full, keep trying
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	309 #else
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	310 while ((funs->putc)(chan, *buf) == false)
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	311 ; // Ignore full, keep trying
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	312 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	313 buf++;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	314 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	315 } else {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	316 cyg_drv_dsr_lock(); // Avoid race condition testing pointers
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	317 while (size > 0) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	318 next = cbuf->put + 1;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	319 if (next == cbuf->len) next = 0;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	320 if (cbuf->nb == cbuf->len) {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	321 cbuf->waiting = true;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	322 // Buffer full - wait for space
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	323 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	324 if ( 0 == (chan->flow_desc.flags & CYG_SERIAL_FLOW_OUT_THROTTLED) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	325 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	326 (funs->start_xmit)(chan); // Make sure xmit is running
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	327
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	328 // Check flag: 'start_xmit' may have obviated the need
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	329 // to wait :-)
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 20 diff changeset	330 if (cbuf->waiting) {
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	331 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	332 // Optionally return if configured for non-blocking mode.
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	333 if (!cbuf->blocking) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	334 *len -= size; // number of characters actually sent
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	335 cbuf->waiting = false;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	336 res = -EAGAIN;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	337 break;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	338 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	339 #endif // CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 20 diff changeset	340 cbuf->pending += size; // Have this much more to send [eventually]
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	341 if( !cyg_drv_cond_wait(&cbuf->wait) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	342 cbuf->abort = true;
62 7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 20 diff changeset	343 cbuf->pending -= size;
7a6ac9edc838 Merge from eCos master repository on 2000-01-24-19:43:49-GMT jlarmour parents: 20 diff changeset	344 }
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	345 if (cbuf->abort) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	346 // Give up!
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	347 *len -= size; // number of characters actually sent
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	348 cbuf->abort = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	349 cbuf->waiting = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	350 res = -EINTR;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	351 break;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	352 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	353 } else {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	354 cbuf->data[cbuf->put++] = *buf++;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	355 cbuf->put = next;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	356 cbuf->nb++;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	357 size--; // Only count if actually sent!
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	358 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	359 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	360 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	361 if ( 0 == (chan->flow_desc.flags & CYG_SERIAL_FLOW_OUT_THROTTLED) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	362 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	363 (funs->start_xmit)(chan); // Start output as necessary
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	364 cyg_drv_dsr_unlock();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	365 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	366 cyg_drv_mutex_unlock(&cbuf->lock);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	367 return res;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	368 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	369
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	370
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	371 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	372
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	373 static Cyg_ErrNo
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	374 serial_read(cyg_io_handle_t handle, void _buf, cyg_uint32 len)
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	375 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	376 cyg_devtab_entry_t t = (cyg_devtab_entry_t )handle;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	377 serial_channel chan = (serial_channel )t->priv;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	378 serial_funs *funs = chan->funs;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	379 cyg_uint8 buf = (cyg_uint8 )_buf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	380 cyg_int32 size = 0;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	381 cbuf_t *cbuf = &chan->in_cbuf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	382 Cyg_ErrNo res = ENOERR;
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	383 #ifdef XX_CYGDBG_DIAG_BUF
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	384 extern int enable_diag_uart;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	385 int _enable = enable_diag_uart;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	386 int _time, _stime;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	387 externC cyg_tick_count_t cyg_current_time(void);
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	388 #endif // CYGDBG_DIAG_BUF
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	389
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	390 cyg_drv_mutex_lock(&cbuf->lock);
4 1d7f19c9e4d1 Merge from eCos master repository on 1999-05-11-21:11:10-BST jlarmour parents: 2 diff changeset	391 cbuf->abort = false;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	392
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	393 if (cbuf->len == 0) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	394 // Non interrupt driven (i.e. polled) operation
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	395 while (size++ < *len) {
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	396 cyg_uint8 c = (funs->getc)(chan);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	397 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	398 // for software flow control, if the driver returns one of the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	399 // characters we act on it and then drop it (the app must not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	400 // see it)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	401 if ( chan->config.flags & CYGNUM_SERIAL_FLOW_XONXOFF_TX ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	402 if ( c == CYGDAT_IO_SERIAL_FLOW_CONTROL_XOFF_CHAR ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	403 throttle_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	404 } else if ( c == CYGDAT_IO_SERIAL_FLOW_CONTROL_XON_CHAR ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	405 restart_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	406 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	407 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	408 *buf++ = c;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	409 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	410 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	411 *buf++ = c;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	412 #else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	413 *buf++ = c;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	414 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	415 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	416 } else {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	417 cyg_drv_dsr_lock(); // Avoid races
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	418 while (size < *len) {
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	419 if (cbuf->nb > 0) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	420 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	421 if ( (cbuf->nb <= cbuf->low_water) &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	422 (chan->flow_desc.flags & CYG_SERIAL_FLOW_IN_THROTTLED) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	423 restart_rx( chan, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	424 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	425 *buf++ = cbuf->data[cbuf->get];
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	426 if (++cbuf->get == cbuf->len) cbuf->get = 0;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	427 cbuf->nb--;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	428 size++;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	429 } else {
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	430 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	431 if (!cbuf->blocking) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	432 *len = size; // characters actually read
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	433 res = -EAGAIN;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	434 break;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	435 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	436 #endif // CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	437 cbuf->waiting = true;
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	438 #ifdef XX_CYGDBG_DIAG_BUF
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	439 enable_diag_uart = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	440 HAL_CLOCK_READ(&_time);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	441 _stime = (int)cyg_current_time();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	442 diag_printf("READ wait - get: %d, put: %d, time: %x.%x\n", cbuf->get, cbuf->put, _stime, _time);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	443 enable_diag_uart = _enable;
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	444 #endif // CYGDBG_DIAG_BUF
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	445 if( !cyg_drv_cond_wait(&cbuf->wait) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	446 cbuf->abort = true;
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	447 #ifdef XX_CYGDBG_DIAG_BUF
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	448 enable_diag_uart = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	449 HAL_CLOCK_READ(&_time);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	450 _stime = (int)cyg_current_time();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	451 diag_printf("READ continue - get: %d, put: %d, time: %x.%x\n", cbuf->get, cbuf->put, _stime, _time);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	452 enable_diag_uart = _enable;
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	453 #endif // CYGDBG_DIAG_BUF
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	454 if (cbuf->abort) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	455 // Give up!
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	456 *len = size; // characters actually read
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	457 cbuf->abort = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	458 cbuf->waiting = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	459 res = -EINTR;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	460 break;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	461 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	462 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	463 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	464 cyg_drv_dsr_unlock();
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	465 }
82 6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	466 #ifdef XX_CYGDBG_DIAG_BUF
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	467 cyg_drv_isr_lock();
82 6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	468 enable_diag_uart = 0;
6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	469 HAL_CLOCK_READ(&_time);
6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	470 _stime = (int)cyg_current_time();
6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	471 diag_printf("READ done - size: %d, len: %d, time: %x.%x\n", size, *len, _stime, _time);
6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	472 enable_diag_uart = _enable;
6736c52df507 Merge from eCos master repository on 2000-04-14-13:35:46-BST jlarmour parents: 66 diff changeset	473 cyg_drv_isr_unlock();
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	474 #endif // CYGDBG_DIAG_BUF
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	475 cyg_drv_mutex_unlock(&cbuf->lock);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	476 return res;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	477 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	478
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	479
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	480 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	481
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	482 static cyg_bool
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	483 serial_select(cyg_io_handle_t handle, cyg_uint32 which, CYG_ADDRWORD info)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	484 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	485 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	486
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	487 cyg_devtab_entry_t t = (cyg_devtab_entry_t )handle;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	488 serial_channel chan = (serial_channel )t->priv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	489
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	490
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	491 switch( which )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	492 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	493 case CYG_FREAD:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	494 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	495 cbuf_t *cbuf = &chan->in_cbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	496
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	497 // Check for data in the input buffer. If there is none,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	498 // register the select operation, otherwise return true.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	499
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	500 if( cbuf->nb == 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	501 cyg_selrecord( info, &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	502 else return true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	503 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	504 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	505
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	506 case CYG_FWRITE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	507 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	508 // Check for space in the output buffer. If there is none,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	509 // register the select operation, otherwise return true.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	510
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	511 cbuf_t *cbuf = &chan->out_cbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	512 int space = cbuf->len - cbuf->nb;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	513 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	514 if ( (space < cbuf->low_water) \|\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	515 (chan->flow_desc.flags & CYG_SERIAL_FLOW_OUT_THROTTLED) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	516 cyg_selrecord( info, &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	517 #else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	518 if (space < cbuf->low_water)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	519 cyg_selrecord( info, &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	520 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	521 else return true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	522 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	523 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	524
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	525 case 0: // exceptions - none supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	526 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	527 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	528 return false;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	529 #else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	530
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	531 // With no select support, we simply return true.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	532 return true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	533 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	534 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	535
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	536
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	537 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	538
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	539 static Cyg_ErrNo
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	540 serial_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *xbuf,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	541 cyg_uint32 *len)
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	542 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	543 cyg_devtab_entry_t t = (cyg_devtab_entry_t )handle;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	544 serial_channel chan = (serial_channel )t->priv;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	545 cyg_serial_info_t buf = (cyg_serial_info_t )xbuf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	546 Cyg_ErrNo res = ENOERR;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	547 cbuf_t *out_cbuf = &chan->out_cbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	548 cbuf_t *in_cbuf = &chan->in_cbuf;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	549 serial_funs *funs = chan->funs;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	550
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	551 switch (key) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	552 case CYG_IO_GET_CONFIG_SERIAL_INFO:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	553 if (*len < sizeof(cyg_serial_info_t)) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	554 return -EINVAL;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	555 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	556 *buf = chan->config;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	557 *len = sizeof(chan->config);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	558 break;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	559
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	560 case CYG_IO_GET_CONFIG_SERIAL_BUFFER_INFO:
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	561 // return rx/tx buffer sizes and counts
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	562 {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	563 cyg_serial_buf_info_t *p;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	564 if (*len < sizeof(cyg_serial_buf_info_t))
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	565 return -EINVAL;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	566
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	567 *len = sizeof(cyg_serial_buf_info_t);
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	568 p = (cyg_serial_buf_info_t *)xbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	569
88 afdeb44241de Merge from eCos master repository on 2000-05-12-07:47:04-BST jlarmour parents: 86 diff changeset	570 p->rx_bufsize = in_cbuf->len;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	571 if (p->rx_bufsize)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	572 p->rx_count = in_cbuf->nb;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	573 else
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	574 p->rx_count = 0;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	575
88 afdeb44241de Merge from eCos master repository on 2000-05-12-07:47:04-BST jlarmour parents: 86 diff changeset	576 p->tx_bufsize = out_cbuf->len;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	577 if (p->tx_bufsize)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	578 p->tx_count = out_cbuf->nb;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	579 else
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	580 p->tx_count = 0;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	581 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	582 break;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	583
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	584 case CYG_IO_GET_CONFIG_SERIAL_OUTPUT_DRAIN:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	585 // Wait for any pending output to complete
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	586 if (out_cbuf->len == 0) break; // Nothing to do if not buffered
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	587 cyg_drv_mutex_lock(&out_cbuf->lock); // Stop any further output processing
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	588 cyg_drv_dsr_lock();
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	589 while (out_cbuf->pending \|\| (out_cbuf->nb > 0)) {
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	590 out_cbuf->waiting = true;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	591 if(!cyg_drv_cond_wait(&out_cbuf->wait) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	592 res = -EINTR;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	593 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	594 cyg_drv_dsr_unlock();
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	595 cyg_drv_mutex_unlock(&out_cbuf->lock);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	596 break;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	597
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	598 case CYG_IO_GET_CONFIG_SERIAL_INPUT_FLUSH:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	599 // Flush any buffered input
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	600 if (in_cbuf->len == 0) break; // Nothing to do if not buffered
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	601 cyg_drv_mutex_lock(&in_cbuf->lock); // Stop any further input processing
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	602 cyg_drv_dsr_lock();
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	603 if (in_cbuf->waiting) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	604 in_cbuf->abort = true;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	605 cyg_drv_cond_signal(&in_cbuf->wait);
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	606 in_cbuf->waiting = false;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	607 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	608 in_cbuf->get = in_cbuf->put = in_cbuf->nb = 0; // Flush buffered input
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	609 cyg_drv_dsr_unlock();
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	610 cyg_drv_mutex_unlock(&in_cbuf->lock);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	611 break;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	612
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	613 case CYG_IO_GET_CONFIG_SERIAL_ABORT:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	614 // Abort any outstanding I/O, including blocked reads
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	615 // Caution - assumed to be called from 'timeout' (i.e. DSR) code
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	616 if (in_cbuf->len != 0) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	617 in_cbuf->abort = true;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	618 cyg_drv_cond_signal(&in_cbuf->wait);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	619 }
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	620 if (out_cbuf->len != 0) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	621 out_cbuf->abort = true;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	622 cyg_drv_cond_signal(&out_cbuf->wait);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	623 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	624 break;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	625
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	626 case CYG_IO_GET_CONFIG_SERIAL_OUTPUT_FLUSH:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	627 // Throw away any pending output
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	628 if (out_cbuf->len == 0) break; // Nothing to do if not buffered
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	629 cyg_drv_mutex_lock(&out_cbuf->lock); // Stop any further output processing
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	630 cyg_drv_dsr_lock();
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	631 if (out_cbuf->nb > 0) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	632 out_cbuf->get = out_cbuf->put = out_cbuf->nb = 0; // Empties queue!
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	633 (funs->stop_xmit)(chan); // Done with transmit
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	634 }
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	635 if (out_cbuf->waiting) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	636 out_cbuf->abort = true;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	637 cyg_drv_cond_signal(&out_cbuf->wait);
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	638 out_cbuf->waiting = false;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	639 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	640 cyg_drv_dsr_unlock();
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	641 cyg_drv_mutex_unlock(&out_cbuf->lock);
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	642 break;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	643
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	644 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	645 case CYG_IO_GET_CONFIG_READ_BLOCKING:
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	646 if (*len < sizeof(cyg_uint32)) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	647 return -EINVAL;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	648 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	649 (cyg_uint32)xbuf = (in_cbuf->blocking) ? 1 : 0;
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	650 break;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	651
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	652 case CYG_IO_GET_CONFIG_WRITE_BLOCKING:
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	653 if (*len < sizeof(cyg_uint32)) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	654 return -EINVAL;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	655 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	656 (cyg_uint32)xbuf = (out_cbuf->blocking) ? 1 : 0;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	657 break;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	658 #endif // CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	659
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	660 default:
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	661 res = -EINVAL;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	662 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	663 return res;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	664 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	665
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	666
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	667 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	668
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	669 static Cyg_ErrNo
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	670 serial_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *xbuf,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	671 cyg_uint32 *len)
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	672 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	673 Cyg_ErrNo res = ENOERR;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	674 cyg_devtab_entry_t t = (cyg_devtab_entry_t )handle;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	675 serial_channel chan = (serial_channel )t->priv;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	676 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	677 cbuf_t *out_cbuf = &chan->out_cbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	678 cbuf_t *in_cbuf = &chan->in_cbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	679 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	680 serial_funs *funs = chan->funs;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	681
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	682 switch (key) {
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	683 #ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	684 case CYG_IO_SET_CONFIG_READ_BLOCKING:
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	685 if (*len < sizeof(cyg_uint32) \|\| 0 == in_cbuf->len) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	686 return -EINVAL;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	687 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	688 in_cbuf->blocking = (1 == (cyg_uint32)xbuf) ? true : false;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	689 break;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	690 case CYG_IO_SET_CONFIG_WRITE_BLOCKING:
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	691 if (*len < sizeof(cyg_uint32) \|\| 0 == out_cbuf->len) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	692 return -EINVAL;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	693 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	694 out_cbuf->blocking = (1 == (cyg_uint32)xbuf) ? true : false;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	695 break;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	696 #endif // CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	697
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	698 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	699 case CYG_IO_SET_CONFIG_SERIAL_FLOW_CONTROL_METHOD:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	700 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	701 cyg_uint32 f = (cyg_uint32 )xbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	702
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	703 if (len < sizeof(f))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	704 return -EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	705
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	706 cyg_drv_dsr_lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	707
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	708 chan->config.flags &= ~(CYGNUM_SERIAL_FLOW_XONXOFF_RX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	709 CYGNUM_SERIAL_FLOW_XONXOFF_TX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	710 CYGNUM_SERIAL_FLOW_RTSCTS_RX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	711 CYGNUM_SERIAL_FLOW_RTSCTS_TX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	712 CYGNUM_SERIAL_FLOW_DSRDTR_RX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	713 CYGNUM_SERIAL_FLOW_DSRDTR_TX);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	714 chan->config.flags \|= (*f & (
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	715 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	716 CYGNUM_SERIAL_FLOW_XONXOFF_RX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	717 CYGNUM_SERIAL_FLOW_XONXOFF_TX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	718 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	719 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_HW
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	720 CYGNUM_SERIAL_FLOW_RTSCTS_RX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	721 CYGNUM_SERIAL_FLOW_RTSCTS_TX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	722 CYGNUM_SERIAL_FLOW_DSRDTR_RX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	723 CYGNUM_SERIAL_FLOW_DSRDTR_TX\|
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	724 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	725 0));
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	726 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_HW
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	727 // up to hardware driver to clear flags if rejected
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	728 res = (funs->set_config)(chan,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	729 CYG_IO_SET_CONFIG_SERIAL_HW_FLOW_CONFIG,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	730 NULL, NULL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	731 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	732 cyg_drv_dsr_unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	733 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	734 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	735
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	736 case CYG_IO_SET_CONFIG_SERIAL_FLOW_CONTROL_FORCE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	737 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	738 cyg_uint32 f = (cyg_uint32 )xbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	739
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	740 if (len < sizeof(f))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	741 return -EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	742
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	743 cyg_drv_dsr_lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	744 switch (*f) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	745 case CYGNUM_SERIAL_FLOW_THROTTLE_RX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	746 throttle_rx( chan, true );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	747 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	748 case CYGNUM_SERIAL_FLOW_RESTART_RX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	749 restart_rx( chan, true );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	750 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	751 case CYGNUM_SERIAL_FLOW_THROTTLE_TX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	752 throttle_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	753 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	754 case CYGNUM_SERIAL_FLOW_RESTART_TX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	755 restart_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	756 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	757 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	758 res = -EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	759 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	760 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	761 cyg_drv_dsr_unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	762 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	763 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	764 #endif // CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	765
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	766 #ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	767 case CYG_IO_SET_CONFIG_SERIAL_STATUS_CALLBACK:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	768 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	769 cyg_serial_line_status_callback_fn_t newfn;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	770 CYG_ADDRWORD newpriv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	771 cyg_serial_line_status_callback_t *tmp =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	772 (cyg_serial_line_status_callback_t *)xbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	773
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	774 if ( len < sizeof(tmp) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	775 return -EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	776
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	777 newfn = tmp->fn;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	778 newpriv = tmp->priv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	779
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	780 // prevent callbacks while we do this
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	781 cyg_drv_dsr_lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	782 // store old callbacks in same structure
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	783 tmp->fn = chan->status_callback;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	784 tmp->priv = chan->status_callback_priv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	785 chan->status_callback = newfn;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	786 chan->status_callback_priv = newpriv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	787 cyg_drv_dsr_unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	788 len = sizeof(tmp);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	789 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	790 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	791 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	792
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	793 default:
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	794 // pass down to lower layers
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	795 return (funs->set_config)(chan, key, xbuf, len);
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	796 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	797 return res;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	798 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	799
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	800 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	801
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	802 static void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	803 serial_xmt_char(serial_channel *chan)
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	804 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	805 cbuf_t *cbuf = &chan->out_cbuf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	806 serial_funs *funs = chan->funs;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	807 unsigned char c;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	808 int space;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	809
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	810 #if CYGINT_IO_SERIAL_BLOCK_TRANSFER
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	811 CYG_ASSERT(false == cbuf->block_mode_xfer_running,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	812 "Attempting char xmt while block transfer is running");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	813 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	814 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	815 // if we are required to send an XON/XOFF char, send it before
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	816 // anything else
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	817 // FIXME: what if XON gets corrupted in transit to the other end?
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	818 // Should we resend XON even though the other end may not be wanting
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	819 // to send us stuff at this point?
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	820 if ( chan->config.flags & CYGNUM_SERIAL_FLOW_XONXOFF_RX ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	821 if ( chan->flow_desc.xchar ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	822 if ( (funs->putc)(chan, chan->flow_desc.xchar) ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	823 chan->flow_desc.xchar = '\0';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	824 } else { // otherwise there's no space and we have to wait
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	825 return;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	826 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	827 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	828 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	829 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	830 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	831 // if we're meant to be throttled, just stop and leave
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	832 if ( chan->flow_desc.flags & CYG_SERIAL_FLOW_OUT_THROTTLED ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	833 (funs->stop_xmit)(chan); // Stop transmitting for now
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	834 return;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	835 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	836 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	837 while (cbuf->nb > 0) {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	838 c = cbuf->data[cbuf->get];
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	839 if ((funs->putc)(chan, c)) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	840 cbuf->get++;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	841 if (cbuf->get == cbuf->len) cbuf->get = 0;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	842 cbuf->nb--;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	843 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	844 // See if there is now enough room to restart writer
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	845 space = cbuf->len - cbuf->nb;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	846 if (space >= cbuf->low_water) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	847 if (cbuf->waiting) {
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	848 cbuf->waiting = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	849 cyg_drv_cond_broadcast(&cbuf->wait);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	850 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	851 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	852 cyg_selwakeup( &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	853 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	854 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	855 return; // Need to wait for more space
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	856 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	857 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	858 (funs->stop_xmit)(chan); // Done with transmit
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	859
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	860 // must signal waiters, and wake up selecters for the case when
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	861 // this was the last char to be sent and they hadn't been signalled
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	862 // before (e.g. because of flow control)
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	863 if (cbuf->waiting) {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	864 cbuf->waiting = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	865 cyg_drv_cond_signal(&cbuf->wait);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	866 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	867 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	868 cyg_selwakeup( &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	869 #endif
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	870 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	871
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	872 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	873
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	874 static void
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	875 serial_rcv_char(serial_channel *chan, unsigned char c)
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	876 {
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	877 cbuf_t *cbuf = &chan->in_cbuf;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	878
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	879 #if CYGINT_IO_SERIAL_BLOCK_TRANSFER
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	880 CYG_ASSERT(false == cbuf->block_mode_xfer_running,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	881 "Attempting char rcv while block transfer is running");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	882 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	883 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	884 // for software flow control, if the driver returns one of the characters
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	885 // we act on it and then drop it (the app must not see it)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	886 if ( chan->config.flags & CYGNUM_SERIAL_FLOW_XONXOFF_TX ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	887 if ( c == CYGDAT_IO_SERIAL_FLOW_CONTROL_XOFF_CHAR ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	888 throttle_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	889 return; // it wasn't a "real" character
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	890 } else if ( c == CYGDAT_IO_SERIAL_FLOW_CONTROL_XON_CHAR ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	891 restart_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	892 return; // it wasn't a "real" character
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	893 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	894 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	895 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	896 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	897 // If we've hit the high water mark, tell the other side to stop
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	898 if ( cbuf->nb >= cbuf->high_water ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	899 throttle_rx( chan, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	900 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	901 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	902 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	903 // Wake up any pending selectors if we are about to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	904 // put some data into a previously empty buffer.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	905 if( cbuf->nb == 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	906 cyg_selwakeup( &cbuf->selinfo );
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	907 #endif
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	908
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	909 // If the flow control is not enabled/sufficient and the buffer is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	910 // already full, just throw new characters away.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	911
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	912 if ( cbuf->nb < cbuf->len ) {
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	913 cbuf->data[cbuf->put++] = c;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	914 if (cbuf->put == cbuf->len) cbuf->put = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	915 cbuf->nb++;
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	916 } // note trailing else
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	917 #ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	918 else {
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	919 // Overrun. Report the error.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	920 cyg_serial_line_status_t stat;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	921 stat.which = CYGNUM_SERIAL_STATUS_OVERRUNERR;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	922 serial_indicate_status(chan, &stat);
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	923 }
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	924 #endif
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	925
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	926 if (cbuf->waiting) {
20 5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	927 #ifdef XX_CYGDBG_DIAG_BUF
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	928 extern int enable_diag_uart;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	929 int _enable = enable_diag_uart;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	930 int _time, _stime;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	931 externC cyg_tick_count_t cyg_current_time(void);
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	932 enable_diag_uart = 0;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	933 HAL_CLOCK_READ(&_time);
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	934 _stime = (int)cyg_current_time();
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	935 diag_printf("Signal reader - time: %x.%x\n", _stime, _time);
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	936 enable_diag_uart = _enable;
5f5102441818 Merge from eCos master repository on 1999-07-02-23:17:07-BST jlarmour parents: 4 diff changeset	937 #endif // CYGDBG_DIAG_BUF
2 443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	938 cbuf->waiting = false;
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	939 cyg_drv_cond_signal(&cbuf->wait);
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	940 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	941 }
443894e2e912 Block commit of eCos version 1.2.1 jlarmour parents: diff changeset	942
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	943 //----------------------------------------------------------------------------
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	944 // Flow control indication callback
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	945
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	946 #ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	947 static void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	948 serial_indicate_status(serial_channel chan, cyg_serial_line_status_t s )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	949 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	950 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	951 if ( CYGNUM_SERIAL_STATUS_FLOW == s->which ) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	952 if ( s->value )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	953 restart_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	954 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	955 throttle_tx( chan );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	956 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	957 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	958 if ( chan->status_callback )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	959 (*chan->status_callback)(s, chan->status_callback_priv);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	960 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	961 #endif // ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	962
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	963 //----------------------------------------------------------------------------
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	964 // Block transfer functions. Not all drivers require these. Those that
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	965 // do must follow the required semantics:
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	966 //
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	967 // Attempt to transfer as much via the block transfer function as
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	968 // possible, _but_ if that fails, do the remaining bytes via the
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	969 // single-char function. That ensures that all policy decisions can be
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	970 // made in this driver, and not in the device driver.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	971 //
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	972 // Note: if the driver uses DMA for transmission, an initial failing
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	973 // call to the xmt_req function must cause the start_xmit function to
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	974 // fall-back to regular CPU-interrupt based single-character
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	975 // transmission.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	976
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	977 #if CYGINT_IO_SERIAL_BLOCK_TRANSFER
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	978
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	979 static rcv_req_reply_t
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	980 serial_data_rcv_req(serial_channel *chan, int avail,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	981 int* space_avail, unsigned char** space)
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	982 {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	983 cbuf_t *cbuf = &chan->in_cbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	984 int gap;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	985
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	986 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	987 // When there is software flow-control, force the serial device
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	988 // driver to use the single-char xmt/rcv functions, since these
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	989 // have to make policy decision based on the data. Rcv function
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	990 // may also have to transmit data to throttle the xmitter.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	991 if (chan->config.flags & (CYGNUM_SERIAL_FLOW_XONXOFF_TX\|CYGNUM_SERIAL_FLOW_XONXOFF_RX))
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	992 return CYG_RCV_DISABLED;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	993 #endif
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	994
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	995 CYG_ASSERT(false == cbuf->block_mode_xfer_running,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	996 "Attempting new block transfer while another is running");
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	997 // Check for space
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	998 gap = cbuf->nb;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	999 if (gap == cbuf->len)
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1000 return CYG_RCV_FULL;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1001
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1002 #ifdef CYGDBG_USE_ASSERTS
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1003 cbuf->block_mode_xfer_running = true;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1004 #endif
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1005
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1006 if (0 == gap) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1007 // Buffer is empty. Reset put/get indexes to get max transfer in
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1008 // one chunk.
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1009 cbuf->get = 0;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1010 cbuf->put = 0;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1011 gap = cbuf->len;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1012 } else {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1013 // Free space (G = get, P = put, x = data, . = empty)
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1014 // positive: xxxxP.....Gxxx
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1015 // negative: ..GxxxxxP..... [offer last chunk only]
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1016
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1017 // First try for a gap between put and get locations
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1018 gap = cbuf->get - cbuf->put;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1019 if (gap < 0) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1020 // If failed, the gap is between put and the end of buffer
107 7f461c3a372c Merge from eCos master repository on 2000-07-04-08:04:30-BST jlarmour parents: 88 diff changeset	1021 gap = cbuf->len - cbuf->put;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1022 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1023 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1024
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1025 if (avail < gap) gap = avail; // bound by what's available from hw
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1026
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1027 *space_avail = gap;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1028 *space = &cbuf->data[cbuf->put];
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1029
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1030 CYG_ASSERT((gap+cbuf->nb) <= cbuf->len, "Buffer will overflow");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1031 CYG_ASSERT(cbuf->put < cbuf->len, "Invalid put ptr");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1032 CYG_ASSERT(cbuf->get < cbuf->len, "Invalid get ptr");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1033
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1034 return CYG_RCV_OK;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1035 }
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1036
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1037 static void
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1038 serial_data_rcv_done(serial_channel *chan, int chars_rcvd)
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1039 {
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1040 cbuf_t *cbuf = &chan->in_cbuf;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1041
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1042 cbuf->put += chars_rcvd;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1043 cbuf->nb += chars_rcvd;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1044
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1045 if (cbuf->put == cbuf->len) cbuf->put = 0;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1046
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1047 CYG_ASSERT(cbuf->nb <= cbuf->len, "Buffer overflow");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1048 CYG_ASSERT(cbuf->put < cbuf->len, "Invalid put ptr");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1049 CYG_ASSERT(cbuf->get < cbuf->len, "Invalid get ptr");
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1050
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1051 if (cbuf->waiting) {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1052 cbuf->waiting = false;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1053 cyg_drv_cond_signal(&cbuf->wait);
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1054 }
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1055 #ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1056 // If we've hit the high water mark, tell the other side to stop
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1057 if ( cbuf->nb >= cbuf->high_water ) {
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1058 throttle_rx( chan, false );
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1059 }
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1060 #endif
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1061 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1062 // Wake up any pending selectors if we have
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1063 // put some data into a previously empty buffer.
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1064 if (chars_rcvd == cbuf->nb)
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1065 cyg_selwakeup( &cbuf->selinfo );
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1066 #endif
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1067
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1068 #ifdef CYGDBG_USE_ASSERTS
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1069 cbuf->block_mode_xfer_running = false;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1070 #endif
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1071 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1072
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1073 static xmt_req_reply_t
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1074 serial_data_xmt_req(serial_channel *chan, int space,
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1075 int* chars_avail, unsigned char** chars)
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1076 {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1077 cbuf_t *cbuf = &chan->out_cbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1078 int avail;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1079
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1080 #ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1081 // When there is software flow-control, force the serial device
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1082 // driver to use the single-char xmt/rcv functions, since these
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1083 // have to make policy decision based on the data. Rcv function
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1084 // may also have to transmit data to throttle the xmitter.
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1085 if (chan->config.flags & (CYGNUM_SERIAL_FLOW_XONXOFF_TX\|CYGNUM_SERIAL_FLOW_XONXOFF_RX))
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1086 return CYG_XMT_DISABLED;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1087 #endif
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1088
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1089 CYG_ASSERT(false == cbuf->block_mode_xfer_running,
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1090 "Attempting new block transfer while another is running");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1091
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1092 // Available data (G = get, P = put, x = data, . = empty)
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1093 // 0: no data
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1094 // negative: xxxxP.....Gxxx [offer last chunk only]
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1095 // positive: ..GxxxxxP.....
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1096 if (0 == cbuf->nb)
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1097 return CYG_XMT_EMPTY;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1098
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1099 #ifdef CYGDBG_USE_ASSERTS
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1100 cbuf->block_mode_xfer_running = true;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1101 #endif
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1102
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1103 if (cbuf->get >= cbuf->put) {
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1104 avail = cbuf->len - cbuf->get;
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1105 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1106 avail = cbuf->put - cbuf->get;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1107 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1108
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1109 if (avail > space) avail = space; // bound by space in hardware
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1110
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1111 *chars_avail = avail;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1112 *chars = &cbuf->data[cbuf->get];
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1113
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1114 CYG_ASSERT(avail <= cbuf->len, "Avail overflow");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1115 CYG_ASSERT(cbuf->nb <= cbuf->len, "Buffer overflow");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1116 CYG_ASSERT(cbuf->put < cbuf->len, "Invalid put ptr");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1117 CYG_ASSERT(cbuf->get < cbuf->len, "Invalid get ptr");
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1118
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1119 return CYG_XMT_OK;
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1120 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1121
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1122 static void
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1123 serial_data_xmt_done(serial_channel *chan, int chars_sent)
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1124 {
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1125 cbuf_t *cbuf = &chan->out_cbuf;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1126 serial_funs *funs = chan->funs;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1127 int space;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1128
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1129 cbuf->get += chars_sent;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1130 cbuf->nb -= chars_sent;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1131
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1132 if (cbuf->get == cbuf->len) cbuf->get = 0;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1133
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1134 CYG_ASSERT(cbuf->nb <= cbuf->len, "Buffer overflow");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1135 CYG_ASSERT(cbuf->nb >= 0, "Buffer underflow");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1136 CYG_ASSERT(cbuf->put < cbuf->len, "Invalid put ptr");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1137 CYG_ASSERT(cbuf->get < cbuf->len, "Invalid get ptr");
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1138
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1139 if (0 == cbuf->nb) {
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1140 (funs->stop_xmit)(chan); // Done with transmit
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1141 cbuf->get = cbuf->put = 0; // reset ptrs if empty
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1142 }
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1143
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1144 // See if there is now enough room to restart writer
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1145 space = cbuf->len - cbuf->nb;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1146 if (space >= cbuf->low_water) {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1147 if (cbuf->waiting) {
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1148 cbuf->waiting = false;
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1149 cyg_drv_cond_broadcast(&cbuf->wait);
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1150 }
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1151 #ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1152 cyg_selwakeup( &cbuf->selinfo );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1153 #endif
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1154 }
128 0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1155
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1156 #ifdef CYGDBG_USE_ASSERTS
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1157 cbuf->block_mode_xfer_running = false;
0c2b7be0d798 Merge from eCos master repository on 2000-10-12-08:46:24-BST jlarmour parents: 115 diff changeset	1158 #endif
86 6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1159 }
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1160
6512add4f5d6 Merge from eCos master repository on 2000-05-05-07:47:05-BST jlarmour parents: 82 diff changeset	1161 #endif // CYGINT_IO_SERIAL_BLOCK_TRANSFER
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1162
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1163 // ---------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1164
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 107 diff changeset	1165 // EOF serial.c

Mercurial > ecos

annotate packages/io/serial/current/src/common/serial.c @ 128:0c2b7be0d798 ecos-sw-2000-10-12