1 /* 2 * Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver 3 * 4 * (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM) 5 * 6 * --------------------------------------------------------------------------- 7 * 8 * This program is based on all the other NE2000 drivers for Linux 9 * 10 * --------------------------------------------------------------------------- 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file COPYING in the main directory of the Linux 14 * distribution for more details. 15 * 16 * --------------------------------------------------------------------------- 17 * 18 * The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS 19 * Ethernet Controllers. 20 */ 21 22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 23 24 #include <linux/module.h> 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/delay.h> 29 #include <linux/netdevice.h> 30 #include <linux/etherdevice.h> 31 #include <linux/zorro.h> 32 #include <linux/jiffies.h> 33 34 #include <asm/irq.h> 35 #include <asm/amigaints.h> 36 #include <asm/amigahw.h> 37 38 #define EI_SHIFT(x) (ei_local->reg_offset[x]) 39 #define ei_inb(port) in_8(port) 40 #define ei_outb(val, port) out_8(port, val) 41 #define ei_inb_p(port) in_8(port) 42 #define ei_outb_p(val, port) out_8(port, val) 43 44 static const char version[] = 45 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; 46 47 #include "lib8390.c" 48 49 #define DRV_NAME "zorro8390" 50 51 #define NE_BASE (dev->base_addr) 52 #define NE_CMD (0x00 * 2) 53 #define NE_DATAPORT (0x10 * 2) /* NatSemi-defined port window offset */ 54 #define NE_RESET (0x1f * 2) /* Issue a read to reset, 55 * a write to clear. */ 56 #define NE_IO_EXTENT (0x20 * 2) 57 58 #define NE_EN0_ISR (0x07 * 2) 59 #define NE_EN0_DCFG (0x0e * 2) 60 61 #define NE_EN0_RSARLO (0x08 * 2) 62 #define NE_EN0_RSARHI (0x09 * 2) 63 #define NE_EN0_RCNTLO (0x0a * 2) 64 #define NE_EN0_RXCR (0x0c * 2) 65 #define NE_EN0_TXCR (0x0d * 2) 66 #define NE_EN0_RCNTHI (0x0b * 2) 67 #define NE_EN0_IMR (0x0f * 2) 68 69 #define NESM_START_PG 0x40 /* First page of TX buffer */ 70 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ 71 72 #define WORDSWAP(a) ((((a) >> 8) & 0xff) | ((a) << 8)) 73 74 static struct card_info { 75 zorro_id id; 76 const char *name; 77 unsigned int offset; 78 } cards[] = { 79 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 }, 80 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 }, 81 }; 82 83 /* Hard reset the card. This used to pause for the same period that a 84 * 8390 reset command required, but that shouldn't be necessary. 85 */ 86 static void zorro8390_reset_8390(struct net_device *dev) 87 { 88 unsigned long reset_start_time = jiffies; 89 90 if (ei_debug > 1) 91 netdev_dbg(dev, "resetting - t=%ld...\n", jiffies); 92 93 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET); 94 95 ei_status.txing = 0; 96 ei_status.dmaing = 0; 97 98 /* This check _should_not_ be necessary, omit eventually. */ 99 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0) 100 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) { 101 netdev_warn(dev, "%s: did not complete\n", __func__); 102 break; 103 } 104 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr */ 105 } 106 107 /* Grab the 8390 specific header. Similar to the block_input routine, but 108 * we don't need to be concerned with ring wrap as the header will be at 109 * the start of a page, so we optimize accordingly. 110 */ 111 static void zorro8390_get_8390_hdr(struct net_device *dev, 112 struct e8390_pkt_hdr *hdr, int ring_page) 113 { 114 int nic_base = dev->base_addr; 115 int cnt; 116 short *ptrs; 117 118 /* This *shouldn't* happen. 119 * If it does, it's the last thing you'll see 120 */ 121 if (ei_status.dmaing) { 122 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n", 123 __func__, ei_status.dmaing, ei_status.irqlock); 124 return; 125 } 126 127 ei_status.dmaing |= 0x01; 128 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD); 129 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); 130 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO); 131 z_writeb(0, nic_base + NE_EN0_RCNTHI); 132 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */ 133 z_writeb(ring_page, nic_base + NE_EN0_RSARHI); 134 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD); 135 136 ptrs = (short *)hdr; 137 for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++) 138 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT); 139 140 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */ 141 142 hdr->count = WORDSWAP(hdr->count); 143 144 ei_status.dmaing &= ~0x01; 145 } 146 147 /* Block input and output, similar to the Crynwr packet driver. 148 * If you are porting to a new ethercard, look at the packet driver source 149 * for hints. The NEx000 doesn't share the on-board packet memory -- 150 * you have to put the packet out through the "remote DMA" dataport 151 * using z_writeb. 152 */ 153 static void zorro8390_block_input(struct net_device *dev, int count, 154 struct sk_buff *skb, int ring_offset) 155 { 156 int nic_base = dev->base_addr; 157 char *buf = skb->data; 158 short *ptrs; 159 int cnt; 160 161 /* This *shouldn't* happen. 162 * If it does, it's the last thing you'll see 163 */ 164 if (ei_status.dmaing) { 165 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n", 166 __func__, ei_status.dmaing, ei_status.irqlock); 167 return; 168 } 169 ei_status.dmaing |= 0x01; 170 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD); 171 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); 172 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO); 173 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI); 174 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO); 175 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI); 176 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD); 177 ptrs = (short *)buf; 178 for (cnt = 0; cnt < count >> 1; cnt++) 179 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT); 180 if (count & 0x01) 181 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT); 182 183 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */ 184 ei_status.dmaing &= ~0x01; 185 } 186 187 static void zorro8390_block_output(struct net_device *dev, int count, 188 const unsigned char *buf, 189 const int start_page) 190 { 191 int nic_base = NE_BASE; 192 unsigned long dma_start; 193 short *ptrs; 194 int cnt; 195 196 /* Round the count up for word writes. Do we need to do this? 197 * What effect will an odd byte count have on the 8390? 198 * I should check someday. 199 */ 200 if (count & 0x01) 201 count++; 202 203 /* This *shouldn't* happen. 204 * If it does, it's the last thing you'll see 205 */ 206 if (ei_status.dmaing) { 207 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n", 208 __func__, ei_status.dmaing, ei_status.irqlock); 209 return; 210 } 211 ei_status.dmaing |= 0x01; 212 /* We should already be in page 0, but to be safe... */ 213 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); 214 215 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); 216 217 /* Now the normal output. */ 218 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO); 219 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI); 220 z_writeb(0x00, nic_base + NE_EN0_RSARLO); 221 z_writeb(start_page, nic_base + NE_EN0_RSARHI); 222 223 z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD); 224 ptrs = (short *)buf; 225 for (cnt = 0; cnt < count >> 1; cnt++) 226 z_writew(*ptrs++, NE_BASE + NE_DATAPORT); 227 228 dma_start = jiffies; 229 230 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0) 231 if (time_after(jiffies, dma_start + 2 * HZ / 100)) { 232 /* 20ms */ 233 netdev_err(dev, "timeout waiting for Tx RDC\n"); 234 zorro8390_reset_8390(dev); 235 __NS8390_init(dev, 1); 236 break; 237 } 238 239 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */ 240 ei_status.dmaing &= ~0x01; 241 } 242 243 static int zorro8390_open(struct net_device *dev) 244 { 245 __ei_open(dev); 246 return 0; 247 } 248 249 static int zorro8390_close(struct net_device *dev) 250 { 251 if (ei_debug > 1) 252 netdev_dbg(dev, "Shutting down ethercard\n"); 253 __ei_close(dev); 254 return 0; 255 } 256 257 static void zorro8390_remove_one(struct zorro_dev *z) 258 { 259 struct net_device *dev = zorro_get_drvdata(z); 260 261 unregister_netdev(dev); 262 free_irq(IRQ_AMIGA_PORTS, dev); 263 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2); 264 free_netdev(dev); 265 } 266 267 static struct zorro_device_id zorro8390_zorro_tbl[] = { 268 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, }, 269 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, }, 270 { 0 } 271 }; 272 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl); 273 274 static const struct net_device_ops zorro8390_netdev_ops = { 275 .ndo_open = zorro8390_open, 276 .ndo_stop = zorro8390_close, 277 .ndo_start_xmit = __ei_start_xmit, 278 .ndo_tx_timeout = __ei_tx_timeout, 279 .ndo_get_stats = __ei_get_stats, 280 .ndo_set_rx_mode = __ei_set_multicast_list, 281 .ndo_validate_addr = eth_validate_addr, 282 .ndo_set_mac_address = eth_mac_addr, 283 .ndo_change_mtu = eth_change_mtu, 284 #ifdef CONFIG_NET_POLL_CONTROLLER 285 .ndo_poll_controller = __ei_poll, 286 #endif 287 }; 288 289 static int zorro8390_init(struct net_device *dev, unsigned long board, 290 const char *name, unsigned long ioaddr) 291 { 292 int i; 293 int err; 294 unsigned char SA_prom[32]; 295 int start_page, stop_page; 296 static u32 zorro8390_offsets[16] = { 297 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 298 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, 299 }; 300 301 /* Reset card. Who knows what dain-bramaged state it was left in. */ 302 { 303 unsigned long reset_start_time = jiffies; 304 305 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET); 306 307 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0) 308 if (time_after(jiffies, 309 reset_start_time + 2 * HZ / 100)) { 310 netdev_warn(dev, "not found (no reset ack)\n"); 311 return -ENODEV; 312 } 313 314 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */ 315 } 316 317 /* Read the 16 bytes of station address PROM. 318 * We must first initialize registers, 319 * similar to NS8390_init(eifdev, 0). 320 * We can't reliably read the SAPROM address without this. 321 * (I learned the hard way!). 322 */ 323 { 324 static const struct { 325 u32 value; 326 u32 offset; 327 } program_seq[] = { 328 {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD}, 329 /* Select page 0 */ 330 {0x48, NE_EN0_DCFG}, /* 0x48: Set byte-wide access */ 331 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs */ 332 {0x00, NE_EN0_RCNTHI}, 333 {0x00, NE_EN0_IMR}, /* Mask completion irq */ 334 {0xFF, NE_EN0_ISR}, 335 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */ 336 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */ 337 {32, NE_EN0_RCNTLO}, 338 {0x00, NE_EN0_RCNTHI}, 339 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000 */ 340 {0x00, NE_EN0_RSARHI}, 341 {E8390_RREAD + E8390_START, NE_CMD}, 342 }; 343 for (i = 0; i < ARRAY_SIZE(program_seq); i++) 344 z_writeb(program_seq[i].value, 345 ioaddr + program_seq[i].offset); 346 } 347 for (i = 0; i < 16; i++) { 348 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT); 349 (void)z_readb(ioaddr + NE_DATAPORT); 350 } 351 352 /* We must set the 8390 for word mode. */ 353 z_writeb(0x49, ioaddr + NE_EN0_DCFG); 354 start_page = NESM_START_PG; 355 stop_page = NESM_STOP_PG; 356 357 dev->base_addr = ioaddr; 358 dev->irq = IRQ_AMIGA_PORTS; 359 360 /* Install the Interrupt handler */ 361 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, 362 IRQF_SHARED, DRV_NAME, dev); 363 if (i) 364 return i; 365 366 for (i = 0; i < ETH_ALEN; i++) 367 dev->dev_addr[i] = SA_prom[i]; 368 369 pr_debug("Found ethernet address: %pM\n", dev->dev_addr); 370 371 ei_status.name = name; 372 ei_status.tx_start_page = start_page; 373 ei_status.stop_page = stop_page; 374 ei_status.word16 = 1; 375 376 ei_status.rx_start_page = start_page + TX_PAGES; 377 378 ei_status.reset_8390 = zorro8390_reset_8390; 379 ei_status.block_input = zorro8390_block_input; 380 ei_status.block_output = zorro8390_block_output; 381 ei_status.get_8390_hdr = zorro8390_get_8390_hdr; 382 ei_status.reg_offset = zorro8390_offsets; 383 384 dev->netdev_ops = &zorro8390_netdev_ops; 385 __NS8390_init(dev, 0); 386 err = register_netdev(dev); 387 if (err) { 388 free_irq(IRQ_AMIGA_PORTS, dev); 389 return err; 390 } 391 392 netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n", 393 name, board, dev->dev_addr); 394 395 return 0; 396 } 397 398 static int zorro8390_init_one(struct zorro_dev *z, 399 const struct zorro_device_id *ent) 400 { 401 struct net_device *dev; 402 unsigned long board, ioaddr; 403 int err, i; 404 405 for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--) 406 if (z->id == cards[i].id) 407 break; 408 if (i < 0) 409 return -ENODEV; 410 411 board = z->resource.start; 412 ioaddr = board + cards[i].offset; 413 dev = ____alloc_ei_netdev(0); 414 if (!dev) 415 return -ENOMEM; 416 if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) { 417 free_netdev(dev); 418 return -EBUSY; 419 } 420 err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr)); 421 if (err) { 422 release_mem_region(ioaddr, NE_IO_EXTENT * 2); 423 free_netdev(dev); 424 return err; 425 } 426 zorro_set_drvdata(z, dev); 427 return 0; 428 } 429 430 static struct zorro_driver zorro8390_driver = { 431 .name = "zorro8390", 432 .id_table = zorro8390_zorro_tbl, 433 .probe = zorro8390_init_one, 434 .remove = zorro8390_remove_one, 435 }; 436 437 static int __init zorro8390_init_module(void) 438 { 439 return zorro_register_driver(&zorro8390_driver); 440 } 441 442 static void __exit zorro8390_cleanup_module(void) 443 { 444 zorro_unregister_driver(&zorro8390_driver); 445 } 446 447 module_init(zorro8390_init_module); 448 module_exit(zorro8390_cleanup_module); 449 450 MODULE_LICENSE("GPL"); 451