Mercurial > flash_v2

annotate packages/devs/eth/cf/current/src/if_sc_lpe.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents
children bd1a71e3e476
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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,
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95 sc_lpe_int
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96 );
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97
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98 NETDEVTAB_ENTRY(sc_lpe_netdev,
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99 "sc_lpe",
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100 sc_lpe_init,
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101 &sc_lpe_sc);
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102
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103 // Updated to actual address when card is inserted
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104 static unsigned char enaddr[] = { 0x08, 0x88, 0x12, 0x34, 0x56, 0x78};
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105
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106 static void sc_lpe_int(struct eth_drv_sc *sc);
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107
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108 #ifdef CYGPKG_NET
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109 #define STACK_SIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
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110 static char sc_lpe_card_handler_stack[STACK_SIZE];
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111 static cyg_thread sc_lpe_card_handler_thread_data;
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112 static cyg_handle_t sc_lpe_card_handler_thread_handle;
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113 #endif // CYGPKG_NET
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114
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115 static void
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116 do_delay(int ticks)
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117 {
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118 #ifdef CYGPKG_KERNEL
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119 cyg_thread_delay(ticks);
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120 #else
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121 CYGACC_CALL_IF_DELAY_US(10000*ticks);
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122 #endif
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123 }
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124
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125 //
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126 // This runs as a separate thread to handle the card. In particular, insertions
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127 // and deletions need to be handled and they take time/coordination, thus the
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128 // separate thread.
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129 //
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130 #ifdef CYGPKG_NET
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131 static void
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132 #else
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133 static int
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134 #endif
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135 sc_lpe_card_handler(cyg_addrword_t param)
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136 {
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137 struct eth_drv_sc *sc = (struct eth_drv_sc *)param;
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138 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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139 struct cf_slot *slot;
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140 struct cf_cftable cftable;
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141 struct cf_config config;
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142 int i, len, ptr, cor = 0;
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143 unsigned char buf[256], *cp;
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144 dp8390_regs *regs;
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145 unsigned char *vers_product, *vers_manuf, *vers_revision, *vers_date;
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146 #ifndef CYGPKG_NET
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147 int tries = 0;
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148 #endif
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149
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150 slot = dp->slot;
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151 cyg_drv_dsr_lock();
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152 while (true) {
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153 cyg_drv_dsr_unlock(); // Give DSRs a chance to run (card insertion)
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154 cyg_drv_dsr_lock();
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155 if (slot->state == CF_SLOT_STATE_Inserted) {
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156 cf_change_state(slot, CF_SLOT_STATE_Ready);
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157 if (slot->state != CF_SLOT_STATE_Ready) {
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158 diag_printf("CF card won't go ready!\n");
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159 continue;
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160 }
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161 len = sizeof(buf);
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162 ptr = 0;
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163 if (cf_get_CIS(slot, CF_CISTPL_MANFID, buf, &len, &ptr)) {
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164 if (*(short *)&buf[2] != SC_LPE_MANUF) {
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165 diag_printf("Not a SC LPE, sorry\n");
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166 continue;
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167 }
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168 }
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169 ptr = 0;
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170 if (cf_get_CIS(slot, CF_CISTPL_VERS_1, buf, &len, &ptr)) {
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171 // Find individual strings
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172 cp = &buf[4];
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173 vers_product = cp;
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174 while (*cp++) ; // Skip to nul
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175 vers_manuf = cp;
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176 while (*cp++) ; // Skip to nul
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177 vers_revision = cp;
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178 while (*cp++) ; // Skip to nul
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179 vers_date = cp;
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180 #ifndef CYGPKG_NET
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181 if (tries != 0) printf("\n");
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182 diag_printf("%s: %s %s %s\n", vers_manuf, vers_product, vers_revision, vers_date);
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183 #endif
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184 }
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185 ptr = 0;
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186 if (cf_get_CIS(slot, CF_CISTPL_CONFIG, buf, &len, &ptr)) {
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187 if (cf_parse_config(buf, len, &config)) {
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188 cor = config.base;
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189 }
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190 }
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191 if (!cor) {
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192 diag_printf("Couldn't find COR pointer!\n");
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193 continue;
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194 }
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195 // Fetch hardware address from card - terrible, but not well defined
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196 for (i = 0; i < ETHER_ADDR_LEN; i++) {
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197 enaddr[i] = slot->attr[0x1C0+(i*2)];
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198 }
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199 ptr = 0;
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200 if (cf_get_CIS(slot, CF_CISTPL_CFTABLE_ENTRY, buf, &len, &ptr)) {
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201 if (cf_parse_cftable(buf, len, &cftable)) {
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202 dp->regs = regs = (dp8390_regs *)&dp->slot->io[cftable.io_space.base[0]];
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203 cf_set_COR(slot, cor, cftable.cor);
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204 // Reset card (read issues RESET, write clears it)
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205 regs->w.page0.reset = regs->r.page0.reset;
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206 while ((regs->r.page0.isr & DP8390_ISR_RESET) == 0) ; // Wait for card
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207 // Initialize upper level driver
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208 (sc->funs->eth_drv->init)(sc, enaddr);
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209 // Tell system card is ready to talk
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210 dp->tab->status = CYG_NETDEVTAB_STATUS_AVAIL;
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211 #ifndef CYGPKG_NET
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212 cyg_drv_dsr_unlock();
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213 return true;
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214 #endif
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215 } else {
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216 diag_printf("Can't parse CIS\n");
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217 continue;
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218 }
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219 } else {
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220 diag_printf("Can't fetch config info\n");
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221 continue;
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222 }
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223 } else if (slot->state == CF_SLOT_STATE_Removed) {
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224 diag_printf("Compact Flash card removed!\n");
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225 } else {
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226 cyg_drv_dsr_unlock();
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227 do_delay(50); // FIXME!
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228 #ifndef CYGPKG_NET
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229 if (tries == 0) printf("... Waiting for network card: ");
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230 printf(".");
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231 if (++tries == 10) {
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232 // 5 seconds have elapsed - give up
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233 return false;
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234 }
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235 cf_hwr_poll(slot); // Check to see if card has been inserted
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236 #endif
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237 cyg_drv_dsr_lock();
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238 }
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239 }
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240 }
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241
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242 static bool
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243 sc_lpe_init(struct cyg_netdevtab_entry *tab)
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244 {
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245 struct eth_drv_sc *sc = (struct eth_drv_sc *)tab->device_instance;
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246 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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247
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248 cf_init(); // Make sure Compact Flash subsystem is initialized
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249 dp->slot = cf_get_slot(0);
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250 dp->tab = tab;
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251
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252 #ifdef CYGPKG_NET
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253 // Create card handling [background] thread
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254 cyg_thread_create(CYGPKG_NET_THREAD_PRIORITY-1, // Priority
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255 sc_lpe_card_handler, // entry
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256 (cyg_addrword_t)sc, // entry parameter
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257 "SC LP-E card support", // Name
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258 &sc_lpe_card_handler_stack[0], // Stack
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259 STACK_SIZE, // Size
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260 &sc_lpe_card_handler_thread_handle, // Handle
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261 &sc_lpe_card_handler_thread_data // Thread data structure
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262 );
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263 cyg_thread_resume(sc_lpe_card_handler_thread_handle); // Start it
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264
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265 // Initialize environment, setup interrupt handler
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266 cf_register_handler(dp->slot, sc_lpe_int, sc);
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267
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268 return false; // Device is not ready until inserted, powered up, etc.
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269 #else
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270 // Initialize card
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271 return sc_lpe_card_handler(sc);
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272 #endif
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273 }
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274
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275 static void
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276 sc_lpe_stop(struct eth_drv_sc *sc)
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277 {
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278 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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279 dp8390_regs *regs = dp->regs;
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280
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281 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_STOP; // Brutal
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282 regs->w.page0.isr = 0xFF; // Clear any pending interrupts
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283 regs->w.page0.imr = 0x00; // Disable all interrupts
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284 dp->running = false;
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285 }
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286
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287 //
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288 // This function is called to "start up" the interface. It may be called
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289 // multiple times, even when the hardware is already running. It will be
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290 // called whenever something "hardware oriented" changes and should leave
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291 // the hardware ready to send/receive packets.
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292 //
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293 static void
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294 sc_lpe_start(struct eth_drv_sc *sc, unsigned char *enaddr, int flags)
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295 {
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296 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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297 dp8390_regs *regs = dp->regs;
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298 int i;
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299
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300 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_STOP; // Brutal
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301 regs->w.page0.dcr = DP8390_DCR_INIT;
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302 regs->w.page0.rbch = 0; // Remote byte count
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303 regs->w.page0.rbcl = 0;
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304 regs->w.page0.rcr = DP8390_RCR_MON; // Accept no packets
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305 regs->w.page0.tcr = DP8390_TCR_LOCAL; // Transmitter [virtually] off
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306 regs->w.page0.tpsr = DP8390_TX_BUF1; // Transmitter start page
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307 dp->tx1 = dp->tx2 = 0;
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308 dp->tx_next = DP8390_TX_BUF1;
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309 dp->tx_started = false;
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310 regs->w.page0.pstart = DP8390_RX_START; // Receive ring start page
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311 regs->w.page0.bndry = DP8390_RX_STOP-1; // Receive ring boundary
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312 regs->w.page0.pstop = DP8390_RX_STOP; // Receive ring end page
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313 dp->rx_next = DP8390_RX_START-1;
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314 regs->w.page0.isr = 0xFF; // Clear any pending interrupts
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315 regs->w.page0.imr = DP8390_IMR_All; // Enable all interrupts
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316 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_PAGE1; // Select page 1
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317 regs->w.page1.curp = DP8390_RX_START; // Current page - next free page for Rx
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318 for (i = 0; i < ETHER_ADDR_LEN; i++) {
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319 regs->w.page1.par[i] = enaddr[i];
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320 }
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321 // Enable and start device
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322 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_START;
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323 regs->w.page0.tcr = DP8390_TCR_NORMAL; // Normal transmit operations
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324 regs->w.page0.rcr = DP8390_RCR_AB; // Accept broadcast, no errors, no multicast
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325 dp->running = true;
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326 }
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327
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328 //
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329 // This routine is called to perform special "control" opertions
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330 //
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331 static int
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332 sc_lpe_control(struct eth_drv_sc *sc, unsigned long key,
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333 void *data, int data_len)
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334 {
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335 switch (key) {
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336 case ETH_DRV_SET_MAC_ADDRESS:
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337 return 0;
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338 break;
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339 default:
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340 return 1;
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341 break;
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342 }
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343 }
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344
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345 //
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346 // This routine is called to see if it is possible to send another packet.
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347 // It will return non-zero if a transmit is possible, zero otherwise.
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348 //
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349 static int
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350 sc_lpe_can_send(struct eth_drv_sc *sc)
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351 {
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352 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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353 return ((dp->tx1 == 0) || (dp->tx2 == 0));
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354 }
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355
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356 //
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357 // This routine is called to start the transmitter. It is split out from the
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358 // data handling routine so it may be called either when data becomes first
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359 // available or when an Tx interrupt occurs
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360 //
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361
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362 static void
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363 sc_lpe_start_xmit(struct eth_drv_sc *sc, int start_page, int len)
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364 {
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365 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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366 dp8390_regs *regs = dp->regs;
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367
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368 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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369 regs->w.page0.tbcl = len & 0xFF;
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370 regs->w.page0.tbch = len >> 8;
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371 regs->w.page0.tpsr = start_page;
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372 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_TXPKT | DP8390_CR_START;
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373 dp->tx_started = true;
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374 }
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375
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376 //
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377 // This routine is called to send data to the hardware. It is known a-priori
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378 // that there is free buffer space (dp->tx_next).
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379 //
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380 static void
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381 sc_lpe_send(struct eth_drv_sc *sc, struct eth_drv_sg *sg_list, int sg_len,
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382 int total_len, unsigned long key)
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383 {
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384 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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385 dp8390_regs *regs = dp->regs;
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386 int i, len, start_page, pkt_len;
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387 unsigned char *data;
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388
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389 pkt_len = total_len;
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390 if (pkt_len < IEEE_8023_MIN_FRAME) pkt_len = IEEE_8023_MIN_FRAME;
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391 start_page = dp->tx_next;
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392 if (dp->tx_next == DP8390_TX_BUF1) {
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393 dp->tx1 = start_page;
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394 dp->tx1_len = pkt_len;
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395 dp->tx1_key = key;
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396 dp->tx_next = DP8390_TX_BUF2;
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397 } else {
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398 dp->tx2 = start_page;
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399 dp->tx2_len = pkt_len;
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400 dp->tx2_key = key;
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401 dp->tx_next = DP8390_TX_BUF1;
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402 }
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403 // Send data to device buffer(s)
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404 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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405 regs->w.page0.rbcl = pkt_len & 0xFF;
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406 regs->w.page0.rbch = pkt_len >> 8;
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407 regs->w.page0.rsal = 0;
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408 regs->w.page0.rsah = start_page;
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409 regs->w.page0.isr = DP8390_ISR_RDC; // Clear end of DMA
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410 regs->w.page0.cr = DP8390_CR_WDMA | DP8390_CR_START;
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411 // Put data into buffer
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412 for (i = 0; i < sg_len; i++) {
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413 data = (unsigned char *)sg_list[i].buf;
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parents:
diff changeset
414 len = sg_list[i].len;
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jlarmour
parents:
diff changeset
415 while (len-- > 0) {
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jlarmour
parents:
diff changeset
416 regs->w.page0.data = *data++;
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jlarmour
parents:
diff changeset
417 }
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jlarmour
parents:
diff changeset
418 }
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jlarmour
parents:
diff changeset
419 if (total_len < pkt_len) {
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jlarmour
parents:
diff changeset
420 // Padding to 802.3 length was required
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jlarmour
parents:
diff changeset
421 for (i = total_len; i < pkt_len; i++) {
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jlarmour
parents:
diff changeset
422 regs->w.page0.data = 0;
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jlarmour
parents:
diff changeset
423 }
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jlarmour
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diff changeset
424 }
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jlarmour
parents:
diff changeset
425 // Wait for DMA to complete
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jlarmour
parents:
diff changeset
426 while ((regs->r.page0.isr & DP8390_ISR_RDC) == 0) ;
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jlarmour
parents:
diff changeset
427 // Start transmit if not already going
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jlarmour
parents:
diff changeset
428 if (!dp->tx_started) {
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jlarmour
parents:
diff changeset
429 if (start_page == dp->tx1) {
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parents:
diff changeset
430 dp->tx_int = 1; // Expecting interrupt from BUF1
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parents:
diff changeset
431 } else {
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diff changeset
432 dp->tx_int = 2; // Expecting interrupt from BUF2
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diff changeset
433 }
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diff changeset
434 sc_lpe_start_xmit(sc, start_page, pkt_len);
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jlarmour
parents:
diff changeset
435 }
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jlarmour
parents:
diff changeset
436 }
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jlarmour
parents:
diff changeset
437
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jlarmour
parents:
diff changeset
438 //
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jlarmour
parents:
diff changeset
439 // This function is called when a packet has been received. It's job is
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jlarmour
parents:
diff changeset
440 // to prepare to unload the packet from the hardware. Once the length of
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jlarmour
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diff changeset
441 // the packet is known, the upper layer of the driver can be told. When
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jlarmour
parents:
diff changeset
442 // the upper layer is ready to unload the packet, the internal function
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jlarmour
parents:
diff changeset
443 // 'sc_lpe_recv' will be called to actually fetch it from the hardware.
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jlarmour
parents:
diff changeset
444 //
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jlarmour
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diff changeset
445 static void
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jlarmour
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diff changeset
446 sc_lpe_RxEvent(struct eth_drv_sc *sc, int stat)
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diff changeset
447 {
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jlarmour
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diff changeset
448 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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diff changeset
449 dp8390_regs *regs = dp->regs;
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diff changeset
450 unsigned char rsr;
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jlarmour
parents:
diff changeset
451 unsigned char rcv_hdr[4];
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jlarmour
parents:
diff changeset
452 int i, len, pkt, cur;
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diff changeset
453
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jlarmour
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diff changeset
454 rsr = regs->r.page0.rsr;
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jlarmour
parents:
diff changeset
455 while (true) {
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jlarmour
parents:
diff changeset
456 // Read incoming packet header
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jlarmour
parents:
diff changeset
457 regs->w.page0.cr = DP8390_CR_PAGE1 | DP8390_CR_NODMA | DP8390_CR_START;
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jlarmour
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diff changeset
458 cur = regs->r.page1.curp;
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jlarmour
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diff changeset
459 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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jlarmour
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diff changeset
460 pkt = regs->r.page0.bndry + 1;
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diff changeset
461 if (pkt == cur) break;
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jlarmour
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diff changeset
462 if (pkt == DP8390_RX_STOP) pkt = DP8390_RX_START;
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jlarmour
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diff changeset
463 regs->w.page0.rbcl = sizeof(rcv_hdr);
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jlarmour
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diff changeset
464 regs->w.page0.rbch = 0;
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jlarmour
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diff changeset
465 regs->w.page0.rsal = 0;
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jlarmour
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diff changeset
466 regs->w.page0.rsah = pkt;
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jlarmour
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diff changeset
467 if (dp->rx_next == pkt) {
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jlarmour
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diff changeset
468 // printf("sc_lpe - receiver confused, stat: %x, , rsr: %x\n", stat, rsr);
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diff changeset
469 regs->w.page0.bndry = cur-1; // Update pointer
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diff changeset
470 return;
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diff changeset
471 }
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diff changeset
472 dp->rx_next = pkt;
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diff changeset
473 regs->w.page0.isr = DP8390_ISR_RDC; // Clear end of DMA
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diff changeset
474 regs->w.page0.cr = DP8390_CR_RDMA | DP8390_CR_START;
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jlarmour
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diff changeset
475 for (i = 0; i < sizeof(rcv_hdr); i++) {
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diff changeset
476 rcv_hdr[i] = regs->r.page0.data;
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jlarmour
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diff changeset
477 }
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diff changeset
478 len = ((rcv_hdr[3] << 8) | rcv_hdr[2]) - sizeof(rcv_hdr);
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diff changeset
479 (sc->funs->eth_drv->recv)(sc, len);
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diff changeset
480 regs->w.page0.bndry = rcv_hdr[1]-1; // Update pointer
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jlarmour
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diff changeset
481 }
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diff changeset
482 }
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jlarmour
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diff changeset
483
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jlarmour
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diff changeset
484 //
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jlarmour
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diff changeset
485 // This function is called as a result of the "eth_drv_recv()" call above.
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diff changeset
486 // 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
487 // memory buffers have been allocated for the packet. Note that the buffers
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jlarmour
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diff changeset
488 // may come in pieces, using a scatter-gather list. This allows for more
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jlarmour
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diff changeset
489 // efficient processing in the upper layers of the stack.
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jlarmour
parents:
diff changeset
490 //
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jlarmour
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diff changeset
491 static void
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jlarmour
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diff changeset
492 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
493 {
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jlarmour
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diff changeset
494 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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diff changeset
495 dp8390_regs *regs = dp->regs;
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jlarmour
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diff changeset
496 int i, mlen, len;
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jlarmour
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diff changeset
497 unsigned char *data;
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jlarmour
parents:
diff changeset
498
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jlarmour
parents:
diff changeset
499 // Compute total packet length
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jlarmour
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diff changeset
500 len = 0;
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jlarmour
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diff changeset
501 for (i = 0; i < sg_len; i++) {
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jlarmour
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diff changeset
502 len += sg_list[i].len;
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jlarmour
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diff changeset
503 }
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jlarmour
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diff changeset
504 // Read incoming packet data
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jlarmour
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diff changeset
505 regs->w.page0.cr = DP8390_CR_PAGE0 | DP8390_CR_NODMA | DP8390_CR_START;
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jlarmour
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diff changeset
506 regs->w.page0.rbcl = len & 0xFF;
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jlarmour
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diff changeset
507 regs->w.page0.rbch = len >> 8;
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diff changeset
508 regs->w.page0.rsal = 4; // Past header
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jlarmour
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diff changeset
509 regs->w.page0.rsah = dp->rx_next;
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jlarmour
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diff changeset
510 regs->w.page0.isr = DP8390_ISR_RDC; // Clear end of DMA
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jlarmour
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diff changeset
511 regs->w.page0.cr = DP8390_CR_RDMA | DP8390_CR_START;
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jlarmour
parents:
diff changeset
512 for (i = 0; i < sg_len; i++) {
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diff changeset
513 data = (unsigned char *)sg_list[i].buf;
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jlarmour
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diff changeset
514 mlen = sg_list[i].len;
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jlarmour
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diff changeset
515 while (mlen >= sizeof(*data)) {
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jlarmour
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diff changeset
516 *data++ = regs->r.page0.data;
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jlarmour
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diff changeset
517 mlen -= sizeof(*data);
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jlarmour
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diff changeset
518 }
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jlarmour
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diff changeset
519 }
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jlarmour
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diff changeset
520 }
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jlarmour
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diff changeset
521
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jlarmour
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diff changeset
522 static void
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jlarmour
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diff changeset
523 sc_lpe_TxEvent(struct eth_drv_sc *sc, int stat)
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jlarmour
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diff changeset
524 {
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jlarmour
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diff changeset
525 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
526 dp8390_regs *regs = dp->regs;
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jlarmour
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diff changeset
527 unsigned char tsr;
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jlarmour
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diff changeset
528 unsigned long key;
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jlarmour
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diff changeset
529
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jlarmour
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diff changeset
530 tsr = regs->r.page0.tsr;
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jlarmour
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diff changeset
531 if (dp->tx_int == 1) {
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jlarmour
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diff changeset
532 key = dp->tx1_key;
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jlarmour
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diff changeset
533 dp->tx1 = 0;
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jlarmour
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diff changeset
534 } else {
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jlarmour
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diff changeset
535 key = dp->tx2_key;
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jlarmour
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diff changeset
536 dp->tx2 = 0;
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jlarmour
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diff changeset
537 }
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jlarmour
parents:
diff changeset
538 // Start next packet if one is ready
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jlarmour
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diff changeset
539 dp->tx_started = false;
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jlarmour
parents:
diff changeset
540 if (dp->tx1) {
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jlarmour
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diff changeset
541 sc_lpe_start_xmit(sc, dp->tx1, dp->tx1_len);
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jlarmour
parents:
diff changeset
542 dp->tx_int = 1;
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jlarmour
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diff changeset
543 } else if (dp->tx2) {
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jlarmour
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diff changeset
544 sc_lpe_start_xmit(sc, dp->tx2, dp->tx2_len);
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jlarmour
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diff changeset
545 dp->tx_int = 2;
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jlarmour
parents:
diff changeset
546 } else {
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jlarmour
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diff changeset
547 dp->tx_int = 0;
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jlarmour
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diff changeset
548 }
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549 // Tell higher level we sent this packet
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550 (sc->funs->eth_drv->tx_done)(sc, key, 0);
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551 }
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552
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553 static void
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554 sc_lpe_BufEvent(struct eth_drv_sc *sc, int stat)
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555 {
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556 diag_printf("%s\n", __FUNCTION__);
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557 #if 0
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558 if (stat & PP_BufCFG_RxMiss) {
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559 }
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560 if (stat & PP_BufCFG_TxUE) {
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561 }
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562 #endif
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563 }
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564
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565 static void
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566 sc_lpe_int(struct eth_drv_sc *sc)
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567 {
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568 struct sc_lpe_priv_data *dp = (struct sc_lpe_priv_data *)sc->driver_private;
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569 dp8390_regs *regs = dp->regs;
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570 unsigned char isr;
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571
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572 regs->w.page0.cr = DP8390_CR_NODMA | DP8390_CR_PAGE0 | DP8390_CR_START;
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573 while ((isr = regs->r.page0.isr) != 0) {
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574 regs->w.page0.isr = isr; // Clear set bits
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575 if (!dp->running) return; // Is this necessary?
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576 if (isr & (DP8390_ISR_TxP|DP8390_ISR_TxE)) {
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577 sc_lpe_TxEvent(sc, isr);
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578 }
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579 if (isr & (DP8390_ISR_RxP|DP8390_ISR_RxE)) {
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580 sc_lpe_RxEvent(sc, isr);
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581 }
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582 if (isr & (DP8390_ISR_OFLW|DP8390_ISR_CNT)) {
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583 sc_lpe_BufEvent(sc, isr);
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584 }
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585 }
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586 }
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587