dp8390.c revision 1.2.4.2
1 1.2.4.2 tls /* $NetBSD: dp8390.c,v 1.2.4.2 2012/11/20 03:01:49 tls Exp $ */ 2 1.2.4.2 tls 3 1.2.4.2 tls /* 4 1.2.4.2 tls * This file is derived from sys/arch/i386/stand/lib/netif/dp8390.c 5 1.2.4.2 tls * NetBSD: dp8390.c,v 1.6 2008/12/14 18:46:33 christos Exp 6 1.2.4.2 tls */ 7 1.2.4.2 tls 8 1.2.4.2 tls /* 9 1.2.4.2 tls * Polling driver for National Semiconductor DS8390/WD83C690 based 10 1.2.4.2 tls * ethernet adapters. 11 1.2.4.2 tls * 12 1.2.4.2 tls * Copyright (c) 1998 Matthias Drochner. All rights reserved. 13 1.2.4.2 tls * 14 1.2.4.2 tls * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 15 1.2.4.2 tls * 16 1.2.4.2 tls * Copyright (C) 1993, David Greenman. This software may be used, modified, 17 1.2.4.2 tls * copied, distributed, and sold, in both source and binary form provided that 18 1.2.4.2 tls * the above copyright and these terms are retained. Under no circumstances is 19 1.2.4.2 tls * the author responsible for the proper functioning of this software, nor does 20 1.2.4.2 tls * the author assume any responsibility for damages incurred with its use. 21 1.2.4.2 tls */ 22 1.2.4.2 tls 23 1.2.4.2 tls 24 1.2.4.2 tls #include <sys/types.h> 25 1.2.4.2 tls 26 1.2.4.2 tls #include <lib/libsa/stand.h> 27 1.2.4.2 tls #include <libx68k.h> 28 1.2.4.2 tls 29 1.2.4.2 tls #include <dev/ic/dp8390reg.h> 30 1.2.4.2 tls #include "dp8390.h" 31 1.2.4.2 tls #include "ne.h" 32 1.2.4.2 tls 33 1.2.4.2 tls int dp8390_iobase, dp8390_membase, dp8390_memsize; 34 1.2.4.2 tls #if defined(SUPPORT_WD80X3) && defined(SUPPORT_SMC_ULTRA) 35 1.2.4.2 tls int dp8390_is790; 36 1.2.4.2 tls #endif 37 1.2.4.2 tls uint8_t dp8390_cr_proto; 38 1.2.4.2 tls uint8_t dp8390_dcr_reg; 39 1.2.4.2 tls 40 1.2.4.2 tls #define WE_IOBASE dp8390_iobase 41 1.2.4.2 tls 42 1.2.4.2 tls static u_short rec_page_start; 43 1.2.4.2 tls static u_short rec_page_stop; 44 1.2.4.2 tls static u_short next_packet; 45 1.2.4.2 tls 46 1.2.4.2 tls extern u_char eth_myaddr[6]; 47 1.2.4.2 tls 48 1.2.4.2 tls static void dp8390_read(int, char *, u_short); 49 1.2.4.2 tls 50 1.2.4.2 tls #define NIC_GET(reg) inb(WE_IOBASE + (reg) * 2) 51 1.2.4.2 tls #define NIC_PUT(reg, val) outb(WE_IOBASE + (reg) * 2, val) 52 1.2.4.2 tls 53 1.2.4.2 tls static void 54 1.2.4.2 tls dp8390_init(void) 55 1.2.4.2 tls { 56 1.2.4.2 tls int i; 57 1.2.4.2 tls 58 1.2.4.2 tls /* 59 1.2.4.2 tls * Initialize the NIC in the exact order outlined in the NS manual. 60 1.2.4.2 tls * This init procedure is "mandatory"...don't change what or when 61 1.2.4.2 tls * things happen. 62 1.2.4.2 tls */ 63 1.2.4.2 tls 64 1.2.4.2 tls /* Set interface for page 0, remote DMA complete, stopped. */ 65 1.2.4.2 tls NIC_PUT(ED_P0_CR, dp8390_cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 66 1.2.4.2 tls 67 1.2.4.2 tls if ((dp8390_dcr_reg & ED_DCR_LS)) { 68 1.2.4.2 tls NIC_PUT(ED_P0_DCR, dp8390_dcr_reg); 69 1.2.4.2 tls } else { 70 1.2.4.2 tls /* 71 1.2.4.2 tls * Set FIFO threshold to 8, No auto-init Remote DMA, byte 72 1.2.4.2 tls * order=80x86, byte-wide DMA xfers, 73 1.2.4.2 tls */ 74 1.2.4.2 tls NIC_PUT(ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 75 1.2.4.2 tls } 76 1.2.4.2 tls 77 1.2.4.2 tls /* Clear remote byte count registers. */ 78 1.2.4.2 tls NIC_PUT(ED_P0_RBCR0, 0); 79 1.2.4.2 tls NIC_PUT(ED_P0_RBCR1, 0); 80 1.2.4.2 tls 81 1.2.4.2 tls /* Tell RCR to do nothing for now. */ 82 1.2.4.2 tls NIC_PUT(ED_P0_RCR, ED_RCR_MON); 83 1.2.4.2 tls 84 1.2.4.2 tls /* Place NIC in internal loopback mode. */ 85 1.2.4.2 tls NIC_PUT(ED_P0_TCR, ED_TCR_LB0); 86 1.2.4.2 tls 87 1.2.4.2 tls /* Set lower bits of byte addressable framing to 0. */ 88 1.2.4.2 tls if (dp8390_is790) 89 1.2.4.2 tls NIC_PUT(0x09, 0); 90 1.2.4.2 tls 91 1.2.4.2 tls /* Initialize receive buffer ring. */ 92 1.2.4.2 tls NIC_PUT(ED_P0_BNRY, rec_page_start); 93 1.2.4.2 tls NIC_PUT(ED_P0_PSTART, rec_page_start); 94 1.2.4.2 tls NIC_PUT(ED_P0_PSTOP, rec_page_stop); 95 1.2.4.2 tls 96 1.2.4.2 tls /* 97 1.2.4.2 tls * Clear all interrupts. A '1' in each bit position clears the 98 1.2.4.2 tls * corresponding flag. 99 1.2.4.2 tls */ 100 1.2.4.2 tls NIC_PUT(ED_P0_ISR, 0xff); 101 1.2.4.2 tls 102 1.2.4.2 tls /* 103 1.2.4.2 tls * Disable all interrupts. 104 1.2.4.2 tls */ 105 1.2.4.2 tls NIC_PUT(ED_P0_IMR, 0); 106 1.2.4.2 tls 107 1.2.4.2 tls /* Program command register for page 1. */ 108 1.2.4.2 tls NIC_PUT(ED_P0_CR, dp8390_cr_proto | ED_CR_PAGE_1 | ED_CR_STP); 109 1.2.4.2 tls 110 1.2.4.2 tls /* Copy out our station address. */ 111 1.2.4.2 tls for (i = 0; i < 6; i++) 112 1.2.4.2 tls NIC_PUT(ED_P1_PAR0 + i, eth_myaddr[i]); 113 1.2.4.2 tls 114 1.2.4.2 tls /* 115 1.2.4.2 tls * Set current page pointer to one page after the boundary pointer, as 116 1.2.4.2 tls * recommended in the National manual. 117 1.2.4.2 tls */ 118 1.2.4.2 tls next_packet = rec_page_start + 1; 119 1.2.4.2 tls NIC_PUT(ED_P1_CURR, next_packet); 120 1.2.4.2 tls 121 1.2.4.2 tls /* Program command register for page 0. */ 122 1.2.4.2 tls NIC_PUT(ED_P1_CR, dp8390_cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 123 1.2.4.2 tls 124 1.2.4.2 tls /* directed and broadcast */ 125 1.2.4.2 tls NIC_PUT(ED_P0_RCR, ED_RCR_AB); 126 1.2.4.2 tls 127 1.2.4.2 tls /* Take interface out of loopback. */ 128 1.2.4.2 tls NIC_PUT(ED_P0_TCR, 0); 129 1.2.4.2 tls 130 1.2.4.2 tls /* Fire up the interface. */ 131 1.2.4.2 tls NIC_PUT(ED_P0_CR, dp8390_cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 132 1.2.4.2 tls } 133 1.2.4.2 tls 134 1.2.4.2 tls int 135 1.2.4.2 tls dp8390_config(void) 136 1.2.4.2 tls { 137 1.2.4.2 tls 138 1.2.4.2 tls rec_page_start = TX_PAGE_START + ED_TXBUF_SIZE; 139 1.2.4.2 tls rec_page_stop = TX_PAGE_START + (dp8390_memsize >> ED_PAGE_SHIFT); 140 1.2.4.2 tls 141 1.2.4.2 tls dp8390_init(); 142 1.2.4.2 tls 143 1.2.4.2 tls return 0; 144 1.2.4.2 tls } 145 1.2.4.2 tls 146 1.2.4.2 tls void 147 1.2.4.2 tls dp8390_stop(void) 148 1.2.4.2 tls { 149 1.2.4.2 tls int n = 5000; 150 1.2.4.2 tls 151 1.2.4.2 tls /* Stop everything on the interface, and select page 0 registers. */ 152 1.2.4.2 tls NIC_PUT(ED_P0_CR, dp8390_cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 153 1.2.4.2 tls 154 1.2.4.2 tls /* 155 1.2.4.2 tls * Wait for interface to enter stopped state, but limit # of checks to 156 1.2.4.2 tls * 'n' (about 5ms). It shouldn't even take 5us on modern DS8390's, but 157 1.2.4.2 tls * just in case it's an old one. 158 1.2.4.2 tls */ 159 1.2.4.2 tls while (((NIC_GET(ED_P0_ISR) & ED_ISR_RST) == 0) && --n) 160 1.2.4.2 tls continue; 161 1.2.4.2 tls } 162 1.2.4.2 tls 163 1.2.4.2 tls int 164 1.2.4.2 tls EtherSend(char *pkt, int len) 165 1.2.4.2 tls { 166 1.2.4.2 tls ne2000_writemem(pkt, dp8390_membase, len); 167 1.2.4.2 tls 168 1.2.4.2 tls /* Set TX buffer start page. */ 169 1.2.4.2 tls NIC_PUT(ED_P0_TPSR, TX_PAGE_START); 170 1.2.4.2 tls 171 1.2.4.2 tls /* Set TX length. */ 172 1.2.4.2 tls NIC_PUT(ED_P0_TBCR0, len < 60 ? 60 : len); 173 1.2.4.2 tls NIC_PUT(ED_P0_TBCR1, len >> 8); 174 1.2.4.2 tls 175 1.2.4.2 tls /* Set page 0, remote DMA complete, transmit packet, and *start*. */ 176 1.2.4.2 tls NIC_PUT(ED_P0_CR, dp8390_cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); 177 1.2.4.2 tls 178 1.2.4.2 tls return len; 179 1.2.4.2 tls } 180 1.2.4.2 tls 181 1.2.4.2 tls static void 182 1.2.4.2 tls dp8390_read(int buf, char *dest, u_short len) 183 1.2.4.2 tls { 184 1.2.4.2 tls u_short tmp_amount; 185 1.2.4.2 tls 186 1.2.4.2 tls /* Does copy wrap to lower addr in ring buffer? */ 187 1.2.4.2 tls if (buf + len > dp8390_membase + dp8390_memsize) { 188 1.2.4.2 tls tmp_amount = dp8390_membase + dp8390_memsize - buf; 189 1.2.4.2 tls 190 1.2.4.2 tls /* Copy amount up to end of NIC memory. */ 191 1.2.4.2 tls ne2000_readmem(buf, dest, tmp_amount); 192 1.2.4.2 tls 193 1.2.4.2 tls len -= tmp_amount; 194 1.2.4.2 tls buf = RX_BUFBASE + (rec_page_start << ED_PAGE_SHIFT); 195 1.2.4.2 tls dest += tmp_amount; 196 1.2.4.2 tls } 197 1.2.4.2 tls ne2000_readmem(buf, dest, len); 198 1.2.4.2 tls } 199 1.2.4.2 tls 200 1.2.4.2 tls int 201 1.2.4.2 tls EtherReceive(char *pkt, int maxlen) 202 1.2.4.2 tls { 203 1.2.4.2 tls struct dp8390_ring packet_hdr; 204 1.2.4.2 tls int packet_ptr; 205 1.2.4.2 tls u_short len; 206 1.2.4.2 tls u_char boundary, current; 207 1.2.4.2 tls #ifdef DP8390_OLDCHIPS 208 1.2.4.2 tls u_char nlen; 209 1.2.4.2 tls #endif 210 1.2.4.2 tls 211 1.2.4.2 tls if (!(NIC_GET(ED_P0_RSR) & ED_RSR_PRX)) 212 1.2.4.2 tls return 0; /* XXX error handling */ 213 1.2.4.2 tls 214 1.2.4.2 tls /* Set NIC to page 1 registers to get 'current' pointer. */ 215 1.2.4.2 tls NIC_PUT(ED_P0_CR, dp8390_cr_proto | ED_CR_PAGE_1 | ED_CR_STA); 216 1.2.4.2 tls 217 1.2.4.2 tls /* 218 1.2.4.2 tls * 'sc->next_packet' is the logical beginning of the ring-buffer - i.e. 219 1.2.4.2 tls * it points to where new data has been buffered. The 'CURR' (current) 220 1.2.4.2 tls * register points to the logical end of the ring-buffer - i.e. it 221 1.2.4.2 tls * points to where additional new data will be added. We loop here 222 1.2.4.2 tls * until the logical beginning equals the logical end (or in other 223 1.2.4.2 tls * words, until the ring-buffer is empty). 224 1.2.4.2 tls */ 225 1.2.4.2 tls current = NIC_GET(ED_P1_CURR); 226 1.2.4.2 tls 227 1.2.4.2 tls /* Set NIC to page 0 registers to update boundary register. */ 228 1.2.4.2 tls NIC_PUT(ED_P1_CR, dp8390_cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 229 1.2.4.2 tls 230 1.2.4.2 tls if (next_packet == current) 231 1.2.4.2 tls return 0; 232 1.2.4.2 tls 233 1.2.4.2 tls /* Get pointer to this buffer's header structure. */ 234 1.2.4.2 tls packet_ptr = RX_BUFBASE + (next_packet << ED_PAGE_SHIFT); 235 1.2.4.2 tls 236 1.2.4.2 tls /* 237 1.2.4.2 tls * The byte count includes a 4 byte header that was added by 238 1.2.4.2 tls * the NIC. 239 1.2.4.2 tls */ 240 1.2.4.2 tls ne2000_readmem(packet_ptr, (void *)&packet_hdr, 4); 241 1.2.4.2 tls 242 1.2.4.2 tls len = le16toh(packet_hdr.count); 243 1.2.4.2 tls 244 1.2.4.2 tls #ifdef DP8390_OLDCHIPS 245 1.2.4.2 tls /* 246 1.2.4.2 tls * Try do deal with old, buggy chips that sometimes duplicate 247 1.2.4.2 tls * the low byte of the length into the high byte. We do this 248 1.2.4.2 tls * by simply ignoring the high byte of the length and always 249 1.2.4.2 tls * recalculating it. 250 1.2.4.2 tls * 251 1.2.4.2 tls * NOTE: sc->next_packet is pointing at the current packet. 252 1.2.4.2 tls */ 253 1.2.4.2 tls if (packet_hdr.next_packet >= next_packet) 254 1.2.4.2 tls nlen = (packet_hdr.next_packet - next_packet); 255 1.2.4.2 tls else 256 1.2.4.2 tls nlen = ((packet_hdr.next_packet - rec_page_start) + 257 1.2.4.2 tls (rec_page_stop - next_packet)); 258 1.2.4.2 tls --nlen; 259 1.2.4.2 tls if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) 260 1.2.4.2 tls --nlen; 261 1.2.4.2 tls len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); 262 1.2.4.2 tls #ifdef DIAGNOSTIC 263 1.2.4.2 tls if (len != packet_hdr.count) { 264 1.2.4.2 tls printf(IFNAME ": length does not match next packet pointer\n"); 265 1.2.4.2 tls printf(IFNAME ": len %04x nlen %04x start %02x " 266 1.2.4.2 tls "first %02x curr %02x next %02x stop %02x\n", 267 1.2.4.2 tls packet_hdr.count, len, 268 1.2.4.2 tls rec_page_start, next_packet, current, 269 1.2.4.2 tls packet_hdr.next_packet, rec_page_stop); 270 1.2.4.2 tls } 271 1.2.4.2 tls #endif 272 1.2.4.2 tls #endif 273 1.2.4.2 tls 274 1.2.4.2 tls if (packet_hdr.next_packet < rec_page_start || 275 1.2.4.2 tls packet_hdr.next_packet >= rec_page_stop) 276 1.2.4.2 tls panic(IFNAME ": RAM corrupt"); 277 1.2.4.2 tls 278 1.2.4.2 tls len -= sizeof(struct dp8390_ring); 279 1.2.4.2 tls if (len <= maxlen) { 280 1.2.4.2 tls /* Go get packet. */ 281 1.2.4.2 tls dp8390_read(packet_ptr + sizeof(struct dp8390_ring), 282 1.2.4.2 tls pkt, len); 283 1.2.4.2 tls } else 284 1.2.4.2 tls len = 0; 285 1.2.4.2 tls 286 1.2.4.2 tls /* Update next packet pointer. */ 287 1.2.4.2 tls next_packet = packet_hdr.next_packet; 288 1.2.4.2 tls 289 1.2.4.2 tls /* 290 1.2.4.2 tls * Update NIC boundary pointer - being careful to keep it one 291 1.2.4.2 tls * buffer behind (as recommended by NS databook). 292 1.2.4.2 tls */ 293 1.2.4.2 tls boundary = next_packet - 1; 294 1.2.4.2 tls if (boundary < rec_page_start) 295 1.2.4.2 tls boundary = rec_page_stop - 1; 296 1.2.4.2 tls NIC_PUT(ED_P0_BNRY, boundary); 297 1.2.4.2 tls 298 1.2.4.2 tls return len; 299 1.2.4.2 tls } 300
Indexes created Mon Oct 27 04:09:48 GMT 2025