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 struct ei_device *ei_local = netdev_priv(dev); 90 91 netif_dbg(ei_local, hw, 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_warn(dev, 123 "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n", 124 __func__, ei_status.dmaing, ei_status.irqlock); 125 return; 126 } 127 128 ei_status.dmaing |= 0x01; 129 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD); 130 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); 131 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO); 132 z_writeb(0, nic_base + NE_EN0_RCNTHI); 133 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */ 134 z_writeb(ring_page, nic_base + NE_EN0_RSARHI); 135 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD); 136 137 ptrs = (short *)hdr; 138 for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++) 139 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT); 140 141 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */ 142 143 hdr->count = WORDSWAP(hdr->count); 144 145 ei_status.dmaing &= ~0x01; 146 } 147 148 /* Block input and output, similar to the Crynwr packet driver. 149 * If you are porting to a new ethercard, look at the packet driver source 150 * for hints. The NEx000 doesn't share the on-board packet memory -- 151 * you have to put the packet out through the "remote DMA" dataport 152 * using z_writeb. 153 */ 154 static void zorro8390_block_input(struct net_device *dev, int count, 155 struct sk_buff *skb, int ring_offset) 156 { 157 int nic_base = dev->base_addr; 158 char *buf = skb->data; 159 short *ptrs; 160 int cnt; 161 162 /* This *shouldn't* happen. 163 * If it does, it's the last thing you'll see 164 */ 165 if (ei_status.dmaing) { 166 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n", 167 __func__, ei_status.dmaing, ei_status.irqlock); 168 return; 169 } 170 ei_status.dmaing |= 0x01; 171 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD); 172 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); 173 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO); 174 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI); 175 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO); 176 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI); 177 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD); 178 ptrs = (short *)buf; 179 for (cnt = 0; cnt < count >> 1; cnt++) 180 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT); 181 if (count & 0x01) 182 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT); 183 184 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */ 185 ei_status.dmaing &= ~0x01; 186 } 187 188 static void zorro8390_block_output(struct net_device *dev, int count, 189 const unsigned char *buf, 190 const int start_page) 191 { 192 int nic_base = NE_BASE; 193 unsigned long dma_start; 194 short *ptrs; 195 int cnt; 196 197 /* Round the count up for word writes. Do we need to do this? 198 * What effect will an odd byte count have on the 8390? 199 * I should check someday. 200 */ 201 if (count & 0x01) 202 count++; 203 204 /* This *shouldn't* happen. 205 * If it does, it's the last thing you'll see 206 */ 207 if (ei_status.dmaing) { 208 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n", 209 __func__, ei_status.dmaing, ei_status.irqlock); 210 return; 211 } 212 ei_status.dmaing |= 0x01; 213 /* We should already be in page 0, but to be safe... */ 214 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); 215 216 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); 217 218 /* Now the normal output. */ 219 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO); 220 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI); 221 z_writeb(0x00, nic_base + NE_EN0_RSARLO); 222 z_writeb(start_page, nic_base + NE_EN0_RSARHI); 223 224 z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD); 225 ptrs = (short *)buf; 226 for (cnt = 0; cnt < count >> 1; cnt++) 227 z_writew(*ptrs++, NE_BASE + NE_DATAPORT); 228 229 dma_start = jiffies; 230 231 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0) 232 if (time_after(jiffies, dma_start + 2 * HZ / 100)) { 233 /* 20ms */ 234 netdev_warn(dev, "timeout waiting for Tx RDC\n"); 235 zorro8390_reset_8390(dev); 236 __NS8390_init(dev, 1); 237 break; 238 } 239 240 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */ 241 ei_status.dmaing &= ~0x01; 242 } 243 244 static int zorro8390_open(struct net_device *dev) 245 { 246 __ei_open(dev); 247 return 0; 248 } 249 250 static int zorro8390_close(struct net_device *dev) 251 { 252 struct ei_device *ei_local = netdev_priv(dev); 253 254 netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard\n"); 255 __ei_close(dev); 256 return 0; 257 } 258 259 static void zorro8390_remove_one(struct zorro_dev *z) 260 { 261 struct net_device *dev = zorro_get_drvdata(z); 262 263 unregister_netdev(dev); 264 free_irq(IRQ_AMIGA_PORTS, dev); 265 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2); 266 free_netdev(dev); 267 } 268 269 static struct zorro_device_id zorro8390_zorro_tbl[] = { 270 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, }, 271 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, }, 272 { 0 } 273 }; 274 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl); 275 276 static const struct net_device_ops zorro8390_netdev_ops = { 277 .ndo_open = zorro8390_open, 278 .ndo_stop = zorro8390_close, 279 .ndo_start_xmit = __ei_start_xmit, 280 .ndo_tx_timeout = __ei_tx_timeout, 281 .ndo_get_stats = __ei_get_stats, 282 .ndo_set_rx_mode = __ei_set_multicast_list, 283 .ndo_validate_addr = eth_validate_addr, 284 .ndo_set_mac_address = eth_mac_addr, 285 #ifdef CONFIG_NET_POLL_CONTROLLER 286 .ndo_poll_controller = __ei_poll, 287 #endif 288 }; 289 290 static int zorro8390_init(struct net_device *dev, unsigned long board, 291 const char *name, void __iomem *ioaddr) 292 { 293 int i; 294 int err; 295 unsigned char SA_prom[32]; 296 int start_page, stop_page; 297 static u32 zorro8390_offsets[16] = { 298 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 299 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, 300 }; 301 302 /* Reset card. Who knows what dain-bramaged state it was left in. */ 303 { 304 unsigned long reset_start_time = jiffies; 305 306 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET); 307 308 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0) 309 if (time_after(jiffies, 310 reset_start_time + 2 * HZ / 100)) { 311 netdev_warn(dev, "not found (no reset ack)\n"); 312 return -ENODEV; 313 } 314 315 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */ 316 } 317 318 /* Read the 16 bytes of station address PROM. 319 * We must first initialize registers, 320 * similar to NS8390_init(eifdev, 0). 321 * We can't reliably read the SAPROM address without this. 322 * (I learned the hard way!). 323 */ 324 { 325 static const struct { 326 u32 value; 327 u32 offset; 328 } program_seq[] = { 329 {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD}, 330 /* Select page 0 */ 331 {0x48, NE_EN0_DCFG}, /* 0x48: Set byte-wide access */ 332 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs */ 333 {0x00, NE_EN0_RCNTHI}, 334 {0x00, NE_EN0_IMR}, /* Mask completion irq */ 335 {0xFF, NE_EN0_ISR}, 336 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */ 337 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */ 338 {32, NE_EN0_RCNTLO}, 339 {0x00, NE_EN0_RCNTHI}, 340 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000 */ 341 {0x00, NE_EN0_RSARHI}, 342 {E8390_RREAD + E8390_START, NE_CMD}, 343 }; 344 for (i = 0; i < ARRAY_SIZE(program_seq); i++) 345 z_writeb(program_seq[i].value, 346 ioaddr + program_seq[i].offset); 347 } 348 for (i = 0; i < 16; i++) { 349 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT); 350 (void)z_readb(ioaddr + NE_DATAPORT); 351 } 352 353 /* We must set the 8390 for word mode. */ 354 z_writeb(0x49, ioaddr + NE_EN0_DCFG); 355 start_page = NESM_START_PG; 356 stop_page = NESM_STOP_PG; 357 358 dev->base_addr = (unsigned long)ioaddr; 359 dev->irq = IRQ_AMIGA_PORTS; 360 361 /* Install the Interrupt handler */ 362 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, 363 IRQF_SHARED, DRV_NAME, dev); 364 if (i) 365 return i; 366 367 for (i = 0; i < ETH_ALEN; i++) 368 dev->dev_addr[i] = SA_prom[i]; 369 370 pr_debug("Found ethernet address: %pM\n", dev->dev_addr); 371 372 ei_status.name = name; 373 ei_status.tx_start_page = start_page; 374 ei_status.stop_page = stop_page; 375 ei_status.word16 = 1; 376 377 ei_status.rx_start_page = start_page + TX_PAGES; 378 379 ei_status.reset_8390 = zorro8390_reset_8390; 380 ei_status.block_input = zorro8390_block_input; 381 ei_status.block_output = zorro8390_block_output; 382 ei_status.get_8390_hdr = zorro8390_get_8390_hdr; 383 ei_status.reg_offset = zorro8390_offsets; 384 385 dev->netdev_ops = &zorro8390_netdev_ops; 386 __NS8390_init(dev, 0); 387 388 err = register_netdev(dev); 389 if (err) { 390 free_irq(IRQ_AMIGA_PORTS, dev); 391 return err; 392 } 393 394 netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n", 395 name, board, dev->dev_addr); 396 397 return 0; 398 } 399 400 static int zorro8390_init_one(struct zorro_dev *z, 401 const struct zorro_device_id *ent) 402 { 403 struct net_device *dev; 404 unsigned long board, ioaddr; 405 int err, i; 406 407 for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--) 408 if (z->id == cards[i].id) 409 break; 410 if (i < 0) 411 return -ENODEV; 412 413 board = z->resource.start; 414 ioaddr = board + cards[i].offset; 415 dev = ____alloc_ei_netdev(0); 416 if (!dev) 417 return -ENOMEM; 418 if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) { 419 free_netdev(dev); 420 return -EBUSY; 421 } 422 err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr)); 423 if (err) { 424 release_mem_region(ioaddr, NE_IO_EXTENT * 2); 425 free_netdev(dev); 426 return err; 427 } 428 zorro_set_drvdata(z, dev); 429 return 0; 430 } 431 432 static struct zorro_driver zorro8390_driver = { 433 .name = "zorro8390", 434 .id_table = zorro8390_zorro_tbl, 435 .probe = zorro8390_init_one, 436 .remove = zorro8390_remove_one, 437 }; 438 439 static int __init zorro8390_init_module(void) 440 { 441 return zorro_register_driver(&zorro8390_driver); 442 } 443 444 static void __exit zorro8390_cleanup_module(void) 445 { 446 zorro_unregister_driver(&zorro8390_driver); 447 } 448 449 module_init(zorro8390_init_module); 450 module_exit(zorro8390_cleanup_module); 451 452 MODULE_LICENSE("GPL"); 453