Mercurial > flash_v2

annotate packages/devs/eth/cf/current/src/if_sc_lpe.c @ 126:518f42066aba ecos-sw-2000-09-19

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Merge from eCos master repository on 2000-09-19-06:25:26-BST
author jlarmour
date Tue, 19 Sep 2000 05:53:51 +0000
parents 6bd9d475ed4b
children f2545e5de153
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1 //==========================================================================
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2 //
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3 // dev/if_sc_lpe.c
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4 //
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5 // Ethernet device driver for Socket Communications Compact Flash card
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //####BSDCOPYRIGHTBEGIN####
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32 //
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33 // -------------------------------------------
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34 //
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35 // Portions of this software may have been derived from OpenBSD or other sources,
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36 // and are covered by the appropriate copyright disclaimers included herein.
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37 //
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38 // -------------------------------------------
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39 //
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40 //####BSDCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): gthomas
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45 // Contributors: gthomas
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46 // Date: 2000-07-07
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47 // Purpose:
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48 // Description: hardware driver for LPCF+ ethernet
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49 //
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #include <pkgconf/system.h>
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56 #include <cyg/infra/cyg_type.h>
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57 #include <cyg/hal/hal_arch.h>
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58 #include <cyg/infra/diag.h>
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59 #include <cyg/hal/drv_api.h>
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60 #include <cyg/io/pcmcia.h>
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61 #include <eth_drv.h>
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62 #include <netdev.h>
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63
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64 #ifdef CYGPKG_NET
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65 #include <pkgconf/net.h>
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66 #else
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67 #include <cyg/hal/hal_if.h>
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68 #define diag_printf printf
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69 #endif
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70
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71 #include "dp8390.h"
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72
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73 struct sc_lpe_priv_data {
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74 struct cf_slot *slot;
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75 dp8390_regs *regs;
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76 int tx_next; // First free Tx page
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77 int tx_int; // Expecting interrupt from this buffer
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78 int rx_next; // First free Rx page
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79 int tx1, tx2; // Page numbers for Tx buffers
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80 unsigned long tx1_key, tx2_key; // Used to ack when packet sent
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81 int tx1_len, tx2_len;
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82 bool tx_started, running;
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83 struct cyg_netdevtab_entry *tab;
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84 } _sc_lpe_priv_data;
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85
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86 ETH_DRV_SC(sc_lpe_sc,
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87 &_sc_lpe_priv_data, // Driver specific data
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88 "eth0", // Name for this interface
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89 sc_lpe_start,
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90 sc_lpe_stop,
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91 sc_lpe_control,
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92 sc_lpe_can_send,
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93 sc_lpe_send,
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94 sc_lpe_recv,
121
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95 sc_lpe_int, // deliver function, called from fast net thread
117
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96 sc_lpe_int,
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97 sc_lpe_int_vector
115
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98 );
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99
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100 NETDEVTAB_ENTRY(sc_lpe_netdev,
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101 "sc_lpe",
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102 sc_lpe_init,
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103 &sc_lpe_sc);
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104
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105 // Updated to actual address when card is inserted
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106 static unsigned char enaddr[] = { 0x08, 0x88, 0x12, 0x34, 0x56, 0x78};
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107
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108 static void sc_lpe_int(struct eth_drv_sc *sc);
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109
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110 #ifdef CYGPKG_NET
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111 #define STACK_SIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
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112 static char sc_lpe_card_handler_stack[STACK_SIZE];
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113 static cyg_thread sc_lpe_card_handler_thread_data;
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114 static cyg_handle_t sc_lpe_card_handler_thread_handle;
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115 #endif // CYGPKG_NET
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116
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117 static void
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118 do_delay(int ticks)
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119 {
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120 #ifdef CYGPKG_KERNEL
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121 cyg_thread_delay(ticks);
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122 #else
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123 CYGACC_CALL_IF_DELAY_US(10000*ticks);
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124 #endif
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125 }
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126
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127 //
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128 // This runs as a separate thread to handle the card. In particular, insertions
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129 // and deletions need to be handled and they take time/coordination, thus the
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130 // separate thread.
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131 //
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132 #ifdef CYGPKG_NET
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133 static void
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134 #else
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135 static int
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136 #endif
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137 sc_lpe_card_handler(cyg_addrword_t param)
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138 {
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139 struct eth_drv_sc *sc = (struct eth_drv_sc *)param;
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140 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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141 struct cf_slot *slot;
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142 struct cf_cftable cftable;
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143 struct cf_config config;
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144 int i, len, ptr, cor = 0;
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145 unsigned char buf[256], *cp;
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146 dp8390_regs *regs;
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147 unsigned char *vers_product, *vers_manuf, *vers_revision, *vers_date;
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148 #ifndef CYGPKG_NET
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149 int tries = 0;
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150 #endif
126
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151 bool first = true;
115
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152
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153 slot = dp->slot;
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154 cyg_drv_dsr_lock();
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155 while (true) {
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156 cyg_drv_dsr_unlock(); // Give DSRs a chance to run (card insertion)
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157 cyg_drv_dsr_lock();
126
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158 if ((slot->state == CF_SLOT_STATE_Inserted) ||
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159 ((slot->state == CF_SLOT_STATE_Ready) && first)) {
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160 first = false;
119
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161 if (slot->state != CF_SLOT_STATE_Ready) {
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162 cf_change_state(slot, CF_SLOT_STATE_Ready);
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163 }
115
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164 if (slot->state != CF_SLOT_STATE_Ready) {
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165 diag_printf("CF card won't go ready!\n");
126
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166 #ifndef CYGPKG_NET
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167 return false;
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168 #else
115
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169 continue;
126
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170 #endif
115
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171 }
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172 len = sizeof(buf);
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173 ptr = 0;
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174 if (cf_get_CIS(slot, CF_CISTPL_MANFID, buf, &len, &ptr)) {
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175 if (*(short *)&buf[2] != SC_LPE_MANUF) {
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176 diag_printf("Not a SC LPE, sorry\n");
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177 continue;
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178 }
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179 }
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180 ptr = 0;
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181 if (cf_get_CIS(slot, CF_CISTPL_VERS_1, buf, &len, &ptr)) {
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182 // Find individual strings
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183 cp = &buf[4];
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184 vers_product = cp;
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185 while (*cp++) ; // Skip to nul
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186 vers_manuf = cp;
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187 while (*cp++) ; // Skip to nul
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188 vers_revision = cp;
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189 while (*cp++) ; // Skip to nul
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190 vers_date = cp;
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191 #ifndef CYGPKG_NET
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192 if (tries != 0) printf("\n");
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193 diag_printf("%s: %s %s %s\n", vers_manuf, vers_product, vers_revision, vers_date);
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194 #endif
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195 }
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196 ptr = 0;
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197 if (cf_get_CIS(slot, CF_CISTPL_CONFIG, buf, &len, &ptr)) {
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198 if (cf_parse_config(buf, len, &config)) {
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199 cor = config.base;
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200 }
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201 }
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202 if (!cor) {
126
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203 // diag_printf("Couldn't find COR pointer!\n");
115
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204 continue;
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205 }
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206 // Fetch hardware address from card - terrible, but not well defined
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207 for (i = 0; i < ETHER_ADDR_LEN; i++) {
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208 enaddr[i] = slot->attr[0x1C0+(i*2)];
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209 }
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210 ptr = 0;
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211 if (cf_get_CIS(slot, CF_CISTPL_CFTABLE_ENTRY, buf, &len, &ptr)) {
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212 if (cf_parse_cftable(buf, len, &cftable)) {
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213 dp->regs = regs = (dp8390_regs *)&dp->slot->io[cftable.io_space.base[0]];
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214 cf_set_COR(slot, cor, cftable.cor);
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215 // Reset card (read issues RESET, write clears it)
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216 regs->w.page0.reset = regs->r.page0.reset;
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217 while ((regs->r.page0.isr & DP8390_ISR_RESET) == 0) ; // Wait for card
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218 // Initialize upper level driver
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219 (sc->funs->eth_drv->init)(sc, enaddr);
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220 // Tell system card is ready to talk
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221 dp->tab->status = CYG_NETDEVTAB_STATUS_AVAIL;
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222 #ifndef CYGPKG_NET
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223 cyg_drv_dsr_unlock();
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224 return true;
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225 #endif
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226 } else {
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227 diag_printf("Can't parse CIS\n");
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228 continue;
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229 }
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230 } else {
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231 diag_printf("Can't fetch config info\n");
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232 continue;
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233 }
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234 } else if (slot->state == CF_SLOT_STATE_Removed) {
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235 diag_printf("Compact Flash card removed!\n");
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236 } else {
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237 cyg_drv_dsr_unlock();
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238 do_delay(50); // FIXME!
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239 #ifndef CYGPKG_NET
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240 if (tries == 0) printf("... Waiting for network card: ");
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241 printf(".");
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242 if (++tries == 10) {
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243 // 5 seconds have elapsed - give up
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244 return false;
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245 }
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246 cf_hwr_poll(slot); // Check to see if card has been inserted
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247 #endif
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248 cyg_drv_dsr_lock();
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249 }
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250 }
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251 }
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252
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253 static bool
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254 sc_lpe_init(struct cyg_netdevtab_entry *tab)
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255 {
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256 struct eth_drv_sc *sc = (struct eth_drv_sc *)tab->device_instance;
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257 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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258
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259 cf_init(); // Make sure Compact Flash subsystem is initialized
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260 dp->slot = cf_get_slot(0);
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261 dp->tab = tab;
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262
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263 #ifdef CYGPKG_NET
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264 // Create card handling [background] thread
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265 cyg_thread_create(CYGPKG_NET_THREAD_PRIORITY-1, // Priority
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266 sc_lpe_card_handler, // entry
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267 (cyg_addrword_t)sc, // entry parameter
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268 "SC LP-E card support", // Name
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269 &sc_lpe_card_handler_stack[0], // Stack
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270 STACK_SIZE, // Size
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271 &sc_lpe_card_handler_thread_handle, // Handle
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272 &sc_lpe_card_handler_thread_data // Thread data structure
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273 );
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274 cyg_thread_resume(sc_lpe_card_handler_thread_handle); // Start it
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275
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276 // Initialize environment, setup interrupt handler
121
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277 // eth_drv_dsr is used to tell the fast net thread to run the deliver funcion.
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278 cf_register_handler(dp->slot, eth_drv_dsr, sc);
115
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279
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280 return false; // Device is not ready until inserted, powered up, etc.
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281 #else
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282 // Initialize card
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283 return sc_lpe_card_handler(sc);
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284 #endif
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285 }
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286
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287 static void
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288 sc_lpe_stop(struct eth_drv_sc *sc)
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289 {
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290 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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291 dp8390_regs *regs = dp->regs;
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292
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293 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_STOP; // Brutal
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294 regs->w.page0.isr = 0xFF; // Clear any pending interrupts
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295 regs->w.page0.imr = 0x00; // Disable all interrupts
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296 dp->running = false;
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297 }
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298
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299 //
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300 // This function is called to "start up" the interface. It may be called
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301 // multiple times, even when the hardware is already running. It will be
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302 // called whenever something "hardware oriented" changes and should leave
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303 // the hardware ready to send/receive packets.
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304 //
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305 static void
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306 sc_lpe_start(struct eth_drv_sc *sc, unsigned char *enaddr, int flags)
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307 {
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308 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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309 dp8390_regs *regs = dp->regs;
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310 int i;
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311
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312 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_STOP; // Brutal
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313 regs->w.page0.dcr = DP8390_DCR_INIT;
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314 regs->w.page0.rbch = 0; // Remote byte count
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315 regs->w.page0.rbcl = 0;
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316 regs->w.page0.rcr = DP8390_RCR_MON; // Accept no packets
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317 regs->w.page0.tcr = DP8390_TCR_LOCAL; // Transmitter [virtually] off
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318 regs->w.page0.tpsr = DP8390_TX_BUF1; // Transmitter start page
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319 dp->tx1 = dp->tx2 = 0;
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320 dp->tx_next = DP8390_TX_BUF1;
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321 dp->tx_started = false;
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322 regs->w.page0.pstart = DP8390_RX_START; // Receive ring start page
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323 regs->w.page0.bndry = DP8390_RX_STOP-1; // Receive ring boundary
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324 regs->w.page0.pstop = DP8390_RX_STOP; // Receive ring end page
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325 dp->rx_next = DP8390_RX_START-1;
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326 regs->w.page0.isr = 0xFF; // Clear any pending interrupts
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327 regs->w.page0.imr = DP8390_IMR_All; // Enable all interrupts
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328 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_PAGE1; // Select page 1
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329 regs->w.page1.curp = DP8390_RX_START; // Current page - next free page for Rx
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330 for (i = 0; i < ETHER_ADDR_LEN; i++) {
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331 regs->w.page1.par[i] = enaddr[i];
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332 }
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333 // Enable and start device
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334 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_START;
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335 regs->w.page0.tcr = DP8390_TCR_NORMAL; // Normal transmit operations
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336 regs->w.page0.rcr = DP8390_RCR_AB; // Accept broadcast, no errors, no multicast
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337 dp->running = true;
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338 }
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339
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340 //
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341 // This routine is called to perform special "control" opertions
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342 //
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343 static int
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344 sc_lpe_control(struct eth_drv_sc *sc, unsigned long key,
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345 void *data, int data_len)
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346 {
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347 switch (key) {
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348 case ETH_DRV_SET_MAC_ADDRESS:
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349 return 0;
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350 break;
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351 default:
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352 return 1;
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353 break;
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354 }
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355 }
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356
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357 //
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358 // This routine is called to see if it is possible to send another packet.
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359 // It will return non-zero if a transmit is possible, zero otherwise.
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360 //
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361 static int
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362 sc_lpe_can_send(struct eth_drv_sc *sc)
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363 {
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364 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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365 return ((dp->tx1 == 0) || (dp->tx2 == 0));
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366 }
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367
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368 //
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369 // This routine is called to start the transmitter. It is split out from the
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370 // data handling routine so it may be called either when data becomes first
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371 // available or when an Tx interrupt occurs
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372 //
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373
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374 static void
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375 sc_lpe_start_xmit(struct eth_drv_sc *sc, int start_page, int len)
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376 {
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377 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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378 dp8390_regs *regs = dp->regs;
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379
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380 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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381 regs->w.page0.tbcl = len & 0xFF;
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382 regs->w.page0.tbch = len >> 8;
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383 regs->w.page0.tpsr = start_page;
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384 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_TXPKT | DP8390_CR_START;
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385 dp->tx_started = true;
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386 }
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387
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388 //
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389 // This routine is called to send data to the hardware. It is known a-priori
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390 // that there is free buffer space (dp->tx_next).
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391 //
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392 static void
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393 sc_lpe_send(struct eth_drv_sc *sc, struct eth_drv_sg *sg_list, int sg_len,
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394 int total_len, unsigned long key)
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395 {
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396 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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397 dp8390_regs *regs = dp->regs;
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398 int i, len, start_page, pkt_len;
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399 unsigned char *data;
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400
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401 pkt_len = total_len;
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402 if (pkt_len < IEEE_8023_MIN_FRAME) pkt_len = IEEE_8023_MIN_FRAME;
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403 start_page = dp->tx_next;
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404 if (dp->tx_next == DP8390_TX_BUF1) {
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405 dp->tx1 = start_page;
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406 dp->tx1_len = pkt_len;
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407 dp->tx1_key = key;
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408 dp->tx_next = DP8390_TX_BUF2;
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409 } else {
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410 dp->tx2 = start_page;
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411 dp->tx2_len = pkt_len;
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412 dp->tx2_key = key;
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413 dp->tx_next = DP8390_TX_BUF1;
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414 }
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parents:
diff changeset
415 // Send data to device buffer(s)
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parents:
diff changeset
416 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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jlarmour
parents:
diff changeset
417 regs->w.page0.rbcl = pkt_len & 0xFF;
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jlarmour
parents:
diff changeset
418 regs->w.page0.rbch = pkt_len >> 8;
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jlarmour
parents:
diff changeset
419 regs->w.page0.rsal = 0;
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jlarmour
parents:
diff changeset
420 regs->w.page0.rsah = start_page;
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parents:
diff changeset
421 regs->w.page0.isr = DP8390_ISR_RDC; // Clear end of DMA
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jlarmour
parents:
diff changeset
422 regs->w.page0.cr = DP8390_CR_WDMA | DP8390_CR_START;
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jlarmour
parents:
diff changeset
423 // Put data into buffer
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jlarmour
parents:
diff changeset
424 for (i = 0; i < sg_len; i++) {
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diff changeset
425 data = (unsigned char *)sg_list[i].buf;
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diff changeset
426 len = sg_list[i].len;
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jlarmour
parents:
diff changeset
427 while (len-- > 0) {
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parents:
diff changeset
428 regs->w.page0.data = *data++;
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parents:
diff changeset
429 }
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jlarmour
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diff changeset
430 }
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jlarmour
parents:
diff changeset
431 if (total_len < pkt_len) {
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jlarmour
parents:
diff changeset
432 // Padding to 802.3 length was required
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diff changeset
433 for (i = total_len; i < pkt_len; i++) {
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diff changeset
434 regs->w.page0.data = 0;
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parents:
diff changeset
435 }
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diff changeset
436 }
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jlarmour
parents:
diff changeset
437 // Wait for DMA to complete
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diff changeset
438 while ((regs->r.page0.isr & DP8390_ISR_RDC) == 0) ;
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jlarmour
parents:
diff changeset
439 // Start transmit if not already going
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diff changeset
440 if (!dp->tx_started) {
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diff changeset
441 if (start_page == dp->tx1) {
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442 dp->tx_int = 1; // Expecting interrupt from BUF1
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443 } else {
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444 dp->tx_int = 2; // Expecting interrupt from BUF2
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445 }
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446 sc_lpe_start_xmit(sc, start_page, pkt_len);
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447 }
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jlarmour
parents:
diff changeset
448 }
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jlarmour
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diff changeset
449
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jlarmour
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450 //
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451 // This function is called when a packet has been received. It's job is
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jlarmour
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diff changeset
452 // to prepare to unload the packet from the hardware. Once the length of
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jlarmour
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453 // the packet is known, the upper layer of the driver can be told. When
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jlarmour
parents:
diff changeset
454 // the upper layer is ready to unload the packet, the internal function
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jlarmour
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diff changeset
455 // 'sc_lpe_recv' will be called to actually fetch it from the hardware.
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jlarmour
parents:
diff changeset
456 //
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jlarmour
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diff changeset
457 static void
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jlarmour
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diff changeset
458 sc_lpe_RxEvent(struct eth_drv_sc *sc, int stat)
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jlarmour
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diff changeset
459 {
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jlarmour
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diff changeset
460 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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461 dp8390_regs *regs = dp->regs;
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diff changeset
462 unsigned char rsr;
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diff changeset
463 unsigned char rcv_hdr[4];
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jlarmour
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diff changeset
464 int i, len, pkt, cur;
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diff changeset
465
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466 rsr = regs->r.page0.rsr;
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jlarmour
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diff changeset
467 while (true) {
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jlarmour
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diff changeset
468 // Read incoming packet header
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diff changeset
469 regs->w.page0.cr = DP8390_CR_PAGE1 | DP8390_CR_NODMA | DP8390_CR_START;
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470 cur = regs->r.page1.curp;
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diff changeset
471 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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472 pkt = regs->r.page0.bndry + 1;
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473 if (pkt == cur) break;
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474 if (pkt == DP8390_RX_STOP) pkt = DP8390_RX_START;
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diff changeset
475 regs->w.page0.rbcl = sizeof(rcv_hdr);
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diff changeset
476 regs->w.page0.rbch = 0;
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jlarmour
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diff changeset
477 regs->w.page0.rsal = 0;
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diff changeset
478 regs->w.page0.rsah = pkt;
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diff changeset
479 if (dp->rx_next == pkt) {
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480 // printf("sc_lpe - receiver confused, stat: %x, , rsr: %x\n", stat, rsr);
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diff changeset
481 regs->w.page0.bndry = cur-1; // Update pointer
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diff changeset
482 return;
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diff changeset
483 }
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484 dp->rx_next = pkt;
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diff changeset
485 regs->w.page0.isr = DP8390_ISR_RDC; // Clear end of DMA
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diff changeset
486 regs->w.page0.cr = DP8390_CR_RDMA | DP8390_CR_START;
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diff changeset
487 for (i = 0; i < sizeof(rcv_hdr); i++) {
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diff changeset
488 rcv_hdr[i] = regs->r.page0.data;
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489 }
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diff changeset
490 len = ((rcv_hdr[3] << 8) | rcv_hdr[2]) - sizeof(rcv_hdr);
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jlarmour
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diff changeset
491 (sc->funs->eth_drv->recv)(sc, len);
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diff changeset
492 regs->w.page0.bndry = rcv_hdr[1]-1; // Update pointer
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jlarmour
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diff changeset
493 }
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jlarmour
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diff changeset
494 }
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jlarmour
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diff changeset
495
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jlarmour
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496 //
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jlarmour
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497 // This function is called as a result of the "eth_drv_recv()" call above.
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diff changeset
498 // It's job is to actually fetch data for a packet from the hardware once
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jlarmour
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diff changeset
499 // memory buffers have been allocated for the packet. Note that the buffers
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jlarmour
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diff changeset
500 // may come in pieces, using a scatter-gather list. This allows for more
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jlarmour
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diff changeset
501 // efficient processing in the upper layers of the stack.
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jlarmour
parents:
diff changeset
502 //
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jlarmour
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diff changeset
503 static void
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jlarmour
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diff changeset
504 sc_lpe_recv(struct eth_drv_sc *sc, struct eth_drv_sg *sg_list, int sg_len)
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jlarmour
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diff changeset
505 {
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jlarmour
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diff changeset
506 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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diff changeset
507 dp8390_regs *regs = dp->regs;
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jlarmour
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diff changeset
508 int i, mlen, len;
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jlarmour
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diff changeset
509 unsigned char *data;
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jlarmour
parents:
diff changeset
510
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jlarmour
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diff changeset
511 // Compute total packet length
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jlarmour
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diff changeset
512 len = 0;
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jlarmour
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diff changeset
513 for (i = 0; i < sg_len; i++) {
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514 len += sg_list[i].len;
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jlarmour
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diff changeset
515 }
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jlarmour
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diff changeset
516 // Read incoming packet data
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diff changeset
517 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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diff changeset
518 regs->w.page0.rbcl = len & 0xFF;
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diff changeset
519 regs->w.page0.rbch = len >> 8;
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diff changeset
520 regs->w.page0.rsal = 4; // Past header
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diff changeset
521 regs->w.page0.rsah = dp->rx_next;
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diff changeset
522 regs->w.page0.isr = DP8390_ISR_RDC; // Clear end of DMA
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diff changeset
523 regs->w.page0.cr = DP8390_CR_RDMA | DP8390_CR_START;
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jlarmour
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diff changeset
524 for (i = 0; i < sg_len; i++) {
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diff changeset
525 data = (unsigned char *)sg_list[i].buf;
119
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jlarmour
parents: 117
diff changeset
526 if (data) {
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parents: 117
diff changeset
527 mlen = sg_list[i].len;
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jlarmour
parents: 117
diff changeset
528 while (mlen >= sizeof(*data)) {
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parents: 117
diff changeset
529 *data++ = regs->r.page0.data;
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parents: 117
diff changeset
530 mlen -= sizeof(*data);
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parents: 117
diff changeset
531 }
115
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diff changeset
532 }
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diff changeset
533 }
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jlarmour
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diff changeset
534 }
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jlarmour
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diff changeset
535
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jlarmour
parents:
diff changeset
536 static void
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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diff changeset
537 sc_lpe_TxEvent(struct eth_drv_sc *sc, int stat)
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jlarmour
parents:
diff changeset
538 {
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jlarmour
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diff changeset
539 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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jlarmour
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diff changeset
540 dp8390_regs *regs = dp->regs;
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jlarmour
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diff changeset
541 unsigned char tsr;
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jlarmour
parents:
diff changeset
542 unsigned long key;
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jlarmour
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diff changeset
543
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diff changeset
544 tsr = regs->r.page0.tsr;
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diff changeset
545 if (dp->tx_int == 1) {
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diff changeset
546 key = dp->tx1_key;
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diff changeset
547 dp->tx1 = 0;
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jlarmour
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548 } else {
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549 key = dp->tx2_key;
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550 dp->tx2 = 0;
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551 }
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552 // Start next packet if one is ready
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553 dp->tx_started = false;
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554 if (dp->tx1) {
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555 sc_lpe_start_xmit(sc, dp->tx1, dp->tx1_len);
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556 dp->tx_int = 1;
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557 } else if (dp->tx2) {
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558 sc_lpe_start_xmit(sc, dp->tx2, dp->tx2_len);
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559 dp->tx_int = 2;
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560 } else {
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561 dp->tx_int = 0;
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562 }
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563 // Tell higher level we sent this packet
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564 (sc->funs->eth_drv->tx_done)(sc, key, 0);
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565 }
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566
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567 static void
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568 sc_lpe_BufEvent(struct eth_drv_sc *sc, int stat)
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569 {
126
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570 // What to do if the receive buffers overflow?
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571 if (stat & DP8390_ISR_OFLW) {
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572 // Note: [so far] it seems safe to just ignore this condition
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573 // The Linux driver goes through extraordinary pains to handle
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574 // it, including totally shutting down the chip and restarting.
115
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575 }
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576 }
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577
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578 static void
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579 sc_lpe_int(struct eth_drv_sc *sc)
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580 {
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581 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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582 dp8390_regs *regs = dp->regs;
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583 unsigned char isr;
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584
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585 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_PAGE0 | DP8390_CR_START;
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586 while ((isr = regs->r.page0.isr) != 0) {
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587 regs->w.page0.isr = isr; // Clear set bits
119
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588 if (!dp->running) break; // Is this necessary?
115
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589 if (isr & (DP8390_ISR_TxP|DP8390_ISR_TxE)) {
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590 sc_lpe_TxEvent(sc, isr);
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591 }
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592 if (isr & (DP8390_ISR_RxP|DP8390_ISR_RxE)) {
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593 sc_lpe_RxEvent(sc, isr);
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594 }
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595 if (isr & (DP8390_ISR_OFLW|DP8390_ISR_CNT)) {
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596 sc_lpe_BufEvent(sc, isr);
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597 }
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598 }
117
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599 cf_clear_interrupt(dp->slot);
115
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600 }
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601
117
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602 static int
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603 sc_lpe_int_vector(struct eth_drv_sc *sc)
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604 {
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605 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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606 return dp->slot->int_num;
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607 }