1// SPDX-License-Identifier: GPL-2.0-only 2/* drivers/net/ethernet/8390/ax88796.c 3 * 4 * Copyright 2005,2007 Simtec Electronics 5 * Ben Dooks <ben@simtec.co.uk> 6 * 7 * Asix AX88796 10/100 Ethernet controller support 8 * Based on ne.c, by Donald Becker, et-al. 9 */ 10 11#include <linux/module.h> 12#include <linux/kernel.h> 13#include <linux/errno.h> 14#include <linux/isapnp.h> 15#include <linux/interrupt.h> 16#include <linux/io.h> 17#include <linux/platform_device.h> 18#include <linux/delay.h> 19#include <linux/timer.h> 20#include <linux/netdevice.h> 21#include <linux/etherdevice.h> 22#include <linux/ethtool.h> 23#include <linux/mdio-bitbang.h> 24#include <linux/phy.h> 25#include <linux/eeprom_93cx6.h> 26#include <linux/slab.h> 27 28#include <net/ax88796.h> 29 30 31/* Rename the lib8390.c functions to show that they are in this driver */ 32#define __ei_open ax_ei_open 33#define __ei_close ax_ei_close 34#define __ei_poll ax_ei_poll 35#define __ei_start_xmit ax_ei_start_xmit 36#define __ei_tx_timeout ax_ei_tx_timeout 37#define __ei_get_stats ax_ei_get_stats 38#define __ei_set_multicast_list ax_ei_set_multicast_list 39#define __ei_interrupt ax_ei_interrupt 40#define ____alloc_ei_netdev ax__alloc_ei_netdev 41#define __NS8390_init ax_NS8390_init 42 43/* force unsigned long back to 'void __iomem *' */ 44#define ax_convert_addr(_a) ((void __force __iomem *)(_a)) 45 46#define ei_inb(_a) readb(ax_convert_addr(_a)) 47#define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a)) 48 49#define ei_inb_p(_a) ei_inb(_a) 50#define ei_outb_p(_v, _a) ei_outb(_v, _a) 51 52/* define EI_SHIFT() to take into account our register offsets */ 53#define EI_SHIFT(x) (ei_local->reg_offset[(x)]) 54 55/* Ensure we have our RCR base value */ 56#define AX88796_PLATFORM 57 58static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n"; 59 60#include "lib8390.c" 61 62#define DRV_NAME "ax88796" 63#define DRV_VERSION "1.00" 64 65/* from ne.c */ 66#define NE_CMD EI_SHIFT(0x00) 67#define NE_RESET EI_SHIFT(0x1f) 68#define NE_DATAPORT EI_SHIFT(0x10) 69 70#define NE1SM_START_PG 0x20 /* First page of TX buffer */ 71#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */ 72#define NESM_START_PG 0x40 /* First page of TX buffer */ 73#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ 74 75#define AX_GPOC_PPDSET BIT(6) 76 77/* device private data */ 78 79struct ax_device { 80 struct mii_bus *mii_bus; 81 struct mdiobb_ctrl bb_ctrl; 82 void __iomem *addr_memr; 83 u8 reg_memr; 84 int link; 85 int speed; 86 int duplex; 87 88 void __iomem *map2; 89 const struct ax_plat_data *plat; 90 91 unsigned char running; 92 unsigned char resume_open; 93 unsigned int irqflags; 94 95 u32 reg_offsets[0x20]; 96}; 97 98static inline struct ax_device *to_ax_dev(struct net_device *dev) 99{ 100 struct ei_device *ei_local = netdev_priv(dev); 101 return (struct ax_device *)(ei_local + 1); 102} 103 104/* 105 * ax_initial_check 106 * 107 * do an initial probe for the card to check whether it exists 108 * and is functional 109 */ 110static int ax_initial_check(struct net_device *dev) 111{ 112 struct ei_device *ei_local = netdev_priv(dev); 113 void __iomem *ioaddr = ei_local->mem; 114 int reg0; 115 int regd; 116 117 reg0 = ei_inb(ioaddr); 118 if (reg0 == 0xFF) 119 return -ENODEV; 120 121 ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD); 122 regd = ei_inb(ioaddr + 0x0d); 123 ei_outb(0xff, ioaddr + 0x0d); 124 ei_outb(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD); 125 ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */ 126 if (ei_inb(ioaddr + EN0_COUNTER0) != 0) { 127 ei_outb(reg0, ioaddr); 128 ei_outb(regd, ioaddr + 0x0d); /* Restore the old values. */ 129 return -ENODEV; 130 } 131 132 return 0; 133} 134 135/* 136 * Hard reset the card. This used to pause for the same period that a 137 * 8390 reset command required, but that shouldn't be necessary. 138 */ 139static void ax_reset_8390(struct net_device *dev) 140{ 141 struct ei_device *ei_local = netdev_priv(dev); 142 unsigned long reset_start_time = jiffies; 143 void __iomem *addr = (void __iomem *)dev->base_addr; 144 145 netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies); 146 147 ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET); 148 149 ei_local->txing = 0; 150 ei_local->dmaing = 0; 151 152 /* This check _should_not_ be necessary, omit eventually. */ 153 while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) { 154 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) { 155 netdev_warn(dev, "%s: did not complete.\n", __func__); 156 break; 157 } 158 } 159 160 ei_outb(ENISR_RESET, addr + EN0_ISR); /* Ack intr. */ 161} 162 163/* Wrapper for __ei_interrupt for platforms that have a platform-specific 164 * way to find out whether the interrupt request might be caused by 165 * the ax88796 chip. 166 */ 167static irqreturn_t ax_ei_interrupt_filtered(int irq, void *dev_id) 168{ 169 struct net_device *dev = dev_id; 170 struct ax_device *ax = to_ax_dev(dev); 171 struct platform_device *pdev = to_platform_device(dev->dev.parent); 172 173 if (!ax->plat->check_irq(pdev)) 174 return IRQ_NONE; 175 176 return ax_ei_interrupt(irq, dev_id); 177} 178 179static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, 180 int ring_page) 181{ 182 struct ei_device *ei_local = netdev_priv(dev); 183 void __iomem *nic_base = ei_local->mem; 184 185 /* This *shouldn't* happen. If it does, it's the last thing you'll see */ 186 if (ei_local->dmaing) { 187 netdev_err(dev, "DMAing conflict in %s " 188 "[DMAstat:%d][irqlock:%d].\n", 189 __func__, 190 ei_local->dmaing, ei_local->irqlock); 191 return; 192 } 193 194 ei_local->dmaing |= 0x01; 195 ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD); 196 ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO); 197 ei_outb(0, nic_base + EN0_RCNTHI); 198 ei_outb(0, nic_base + EN0_RSARLO); /* On page boundary */ 199 ei_outb(ring_page, nic_base + EN0_RSARHI); 200 ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD); 201 202 if (ei_local->word16) 203 ioread16_rep(nic_base + NE_DATAPORT, hdr, 204 sizeof(struct e8390_pkt_hdr) >> 1); 205 else 206 ioread8_rep(nic_base + NE_DATAPORT, hdr, 207 sizeof(struct e8390_pkt_hdr)); 208 209 ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ 210 ei_local->dmaing &= ~0x01; 211 212 le16_to_cpus(&hdr->count); 213} 214 215 216/* 217 * Block input and output, similar to the Crynwr packet driver. If 218 * you are porting to a new ethercard, look at the packet driver 219 * source for hints. The NEx000 doesn't share the on-board packet 220 * memory -- you have to put the packet out through the "remote DMA" 221 * dataport using ei_outb. 222 */ 223static void ax_block_input(struct net_device *dev, int count, 224 struct sk_buff *skb, int ring_offset) 225{ 226 struct ei_device *ei_local = netdev_priv(dev); 227 void __iomem *nic_base = ei_local->mem; 228 char *buf = skb->data; 229 230 if (ei_local->dmaing) { 231 netdev_err(dev, 232 "DMAing conflict in %s " 233 "[DMAstat:%d][irqlock:%d].\n", 234 __func__, 235 ei_local->dmaing, ei_local->irqlock); 236 return; 237 } 238 239 ei_local->dmaing |= 0x01; 240 241 ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + NE_CMD); 242 ei_outb(count & 0xff, nic_base + EN0_RCNTLO); 243 ei_outb(count >> 8, nic_base + EN0_RCNTHI); 244 ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO); 245 ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI); 246 ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD); 247 248 if (ei_local->word16) { 249 ioread16_rep(nic_base + NE_DATAPORT, buf, count >> 1); 250 if (count & 0x01) 251 buf[count-1] = ei_inb(nic_base + NE_DATAPORT); 252 253 } else { 254 ioread8_rep(nic_base + NE_DATAPORT, buf, count); 255 } 256 257 ei_local->dmaing &= ~1; 258} 259 260static void ax_block_output(struct net_device *dev, int count, 261 const unsigned char *buf, const int start_page) 262{ 263 struct ei_device *ei_local = netdev_priv(dev); 264 void __iomem *nic_base = ei_local->mem; 265 unsigned long dma_start; 266 267 /* 268 * Round the count up for word writes. Do we need to do this? 269 * What effect will an odd byte count have on the 8390? I 270 * should check someday. 271 */ 272 if (ei_local->word16 && (count & 0x01)) 273 count++; 274 275 /* This *shouldn't* happen. If it does, it's the last thing you'll see */ 276 if (ei_local->dmaing) { 277 netdev_err(dev, "DMAing conflict in %s." 278 "[DMAstat:%d][irqlock:%d]\n", 279 __func__, 280 ei_local->dmaing, ei_local->irqlock); 281 return; 282 } 283 284 ei_local->dmaing |= 0x01; 285 /* We should already be in page 0, but to be safe... */ 286 ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); 287 288 ei_outb(ENISR_RDC, nic_base + EN0_ISR); 289 290 /* Now the normal output. */ 291 ei_outb(count & 0xff, nic_base + EN0_RCNTLO); 292 ei_outb(count >> 8, nic_base + EN0_RCNTHI); 293 ei_outb(0x00, nic_base + EN0_RSARLO); 294 ei_outb(start_page, nic_base + EN0_RSARHI); 295 296 ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD); 297 if (ei_local->word16) 298 iowrite16_rep(nic_base + NE_DATAPORT, buf, count >> 1); 299 else 300 iowrite8_rep(nic_base + NE_DATAPORT, buf, count); 301 302 dma_start = jiffies; 303 304 while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) { 305 if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */ 306 netdev_warn(dev, "timeout waiting for Tx RDC.\n"); 307 ax_reset_8390(dev); 308 ax_NS8390_init(dev, 1); 309 break; 310 } 311 } 312 313 ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ 314 ei_local->dmaing &= ~0x01; 315} 316 317/* definitions for accessing MII/EEPROM interface */ 318 319#define AX_MEMR EI_SHIFT(0x14) 320#define AX_MEMR_MDC BIT(0) 321#define AX_MEMR_MDIR BIT(1) 322#define AX_MEMR_MDI BIT(2) 323#define AX_MEMR_MDO BIT(3) 324#define AX_MEMR_EECS BIT(4) 325#define AX_MEMR_EEI BIT(5) 326#define AX_MEMR_EEO BIT(6) 327#define AX_MEMR_EECLK BIT(7) 328 329static void ax_handle_link_change(struct net_device *dev) 330{ 331 struct ax_device *ax = to_ax_dev(dev); 332 struct phy_device *phy_dev = dev->phydev; 333 int status_change = 0; 334 335 if (phy_dev->link && ((ax->speed != phy_dev->speed) || 336 (ax->duplex != phy_dev->duplex))) { 337 338 ax->speed = phy_dev->speed; 339 ax->duplex = phy_dev->duplex; 340 status_change = 1; 341 } 342 343 if (phy_dev->link != ax->link) { 344 if (!phy_dev->link) { 345 ax->speed = 0; 346 ax->duplex = -1; 347 } 348 ax->link = phy_dev->link; 349 350 status_change = 1; 351 } 352 353 if (status_change) 354 phy_print_status(phy_dev); 355} 356 357static int ax_mii_probe(struct net_device *dev) 358{ 359 struct ax_device *ax = to_ax_dev(dev); 360 struct phy_device *phy_dev = NULL; 361 int ret; 362 363 /* find the first phy */ 364 phy_dev = phy_find_first(ax->mii_bus); 365 if (!phy_dev) { 366 netdev_err(dev, "no PHY found\n"); 367 return -ENODEV; 368 } 369 370 ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change, 371 PHY_INTERFACE_MODE_MII); 372 if (ret) { 373 netdev_err(dev, "Could not attach to PHY\n"); 374 return ret; 375 } 376 377 phy_set_max_speed(phy_dev, SPEED_100); 378 379 netdev_info(dev, "PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", 380 phy_dev->drv->name, phydev_name(phy_dev), phy_dev->irq); 381 382 return 0; 383} 384 385static void ax_phy_switch(struct net_device *dev, int on) 386{ 387 struct ei_device *ei_local = netdev_priv(dev); 388 struct ax_device *ax = to_ax_dev(dev); 389 390 u8 reg_gpoc = ax->plat->gpoc_val; 391 392 if (!!on) 393 reg_gpoc &= ~AX_GPOC_PPDSET; 394 else 395 reg_gpoc |= AX_GPOC_PPDSET; 396 397 ei_outb(reg_gpoc, ei_local->mem + EI_SHIFT(0x17)); 398} 399 400static void ax_bb_mdc(struct mdiobb_ctrl *ctrl, int level) 401{ 402 struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl); 403 404 if (level) 405 ax->reg_memr |= AX_MEMR_MDC; 406 else 407 ax->reg_memr &= ~AX_MEMR_MDC; 408 409 ei_outb(ax->reg_memr, ax->addr_memr); 410} 411 412static void ax_bb_dir(struct mdiobb_ctrl *ctrl, int output) 413{ 414 struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl); 415 416 if (output) 417 ax->reg_memr &= ~AX_MEMR_MDIR; 418 else 419 ax->reg_memr |= AX_MEMR_MDIR; 420 421 ei_outb(ax->reg_memr, ax->addr_memr); 422} 423 424static void ax_bb_set_data(struct mdiobb_ctrl *ctrl, int value) 425{ 426 struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl); 427 428 if (value) 429 ax->reg_memr |= AX_MEMR_MDO; 430 else 431 ax->reg_memr &= ~AX_MEMR_MDO; 432 433 ei_outb(ax->reg_memr, ax->addr_memr); 434} 435 436static int ax_bb_get_data(struct mdiobb_ctrl *ctrl) 437{ 438 struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl); 439 int reg_memr = ei_inb(ax->addr_memr); 440 441 return reg_memr & AX_MEMR_MDI ? 1 : 0; 442} 443 444static const struct mdiobb_ops bb_ops = { 445 .owner = THIS_MODULE, 446 .set_mdc = ax_bb_mdc, 447 .set_mdio_dir = ax_bb_dir, 448 .set_mdio_data = ax_bb_set_data, 449 .get_mdio_data = ax_bb_get_data, 450}; 451 452static int ax_mii_init(struct net_device *dev) 453{ 454 struct platform_device *pdev = to_platform_device(dev->dev.parent); 455 struct ei_device *ei_local = netdev_priv(dev); 456 struct ax_device *ax = to_ax_dev(dev); 457 int err; 458 459 ax->bb_ctrl.ops = &bb_ops; 460 ax->addr_memr = ei_local->mem + AX_MEMR; 461 ax->mii_bus = alloc_mdio_bitbang(&ax->bb_ctrl); 462 if (!ax->mii_bus) { 463 err = -ENOMEM; 464 goto out; 465 } 466 467 ax->mii_bus->name = "ax88796_mii_bus"; 468 ax->mii_bus->parent = dev->dev.parent; 469 snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 470 pdev->name, pdev->id); 471 472 err = mdiobus_register(ax->mii_bus); 473 if (err) 474 goto out_free_mdio_bitbang; 475 476 return 0; 477 478 out_free_mdio_bitbang: 479 free_mdio_bitbang(ax->mii_bus); 480 out: 481 return err; 482} 483 484static int ax_open(struct net_device *dev) 485{ 486 struct ax_device *ax = to_ax_dev(dev); 487 int ret; 488 489 netdev_dbg(dev, "open\n"); 490 491 ret = ax_mii_init(dev); 492 if (ret) 493 goto failed_mii; 494 495 if (ax->plat->check_irq) 496 ret = request_irq(dev->irq, ax_ei_interrupt_filtered, 497 ax->irqflags, dev->name, dev); 498 else 499 ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags, 500 dev->name, dev); 501 if (ret) 502 goto failed_request_irq; 503 504 /* turn the phy on (if turned off) */ 505 ax_phy_switch(dev, 1); 506 507 ret = ax_mii_probe(dev); 508 if (ret) 509 goto failed_mii_probe; 510 phy_start(dev->phydev); 511 512 ret = ax_ei_open(dev); 513 if (ret) 514 goto failed_ax_ei_open; 515 516 ax->running = 1; 517 518 return 0; 519 520 failed_ax_ei_open: 521 phy_disconnect(dev->phydev); 522 failed_mii_probe: 523 ax_phy_switch(dev, 0); 524 free_irq(dev->irq, dev); 525 failed_request_irq: 526 /* unregister mdiobus */ 527 mdiobus_unregister(ax->mii_bus); 528 free_mdio_bitbang(ax->mii_bus); 529 failed_mii: 530 return ret; 531} 532 533static int ax_close(struct net_device *dev) 534{ 535 struct ax_device *ax = to_ax_dev(dev); 536 537 netdev_dbg(dev, "close\n"); 538 539 ax->running = 0; 540 wmb(); 541 542 ax_ei_close(dev); 543 544 /* turn the phy off */ 545 ax_phy_switch(dev, 0); 546 phy_disconnect(dev->phydev); 547 548 free_irq(dev->irq, dev); 549 550 mdiobus_unregister(ax->mii_bus); 551 free_mdio_bitbang(ax->mii_bus); 552 return 0; 553} 554 555static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd) 556{ 557 struct phy_device *phy_dev = dev->phydev; 558 559 if (!netif_running(dev)) 560 return -EINVAL; 561 562 if (!phy_dev) 563 return -ENODEV; 564 565 return phy_mii_ioctl(phy_dev, req, cmd); 566} 567 568/* ethtool ops */ 569 570static void ax_get_drvinfo(struct net_device *dev, 571 struct ethtool_drvinfo *info) 572{ 573 struct platform_device *pdev = to_platform_device(dev->dev.parent); 574 575 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 576 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 577 strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info)); 578} 579 580static u32 ax_get_msglevel(struct net_device *dev) 581{ 582 struct ei_device *ei_local = netdev_priv(dev); 583 584 return ei_local->msg_enable; 585} 586 587static void ax_set_msglevel(struct net_device *dev, u32 v) 588{ 589 struct ei_device *ei_local = netdev_priv(dev); 590 591 ei_local->msg_enable = v; 592} 593 594static const struct ethtool_ops ax_ethtool_ops = { 595 .get_drvinfo = ax_get_drvinfo, 596 .get_link = ethtool_op_get_link, 597 .get_ts_info = ethtool_op_get_ts_info, 598 .get_msglevel = ax_get_msglevel, 599 .set_msglevel = ax_set_msglevel, 600 .get_link_ksettings = phy_ethtool_get_link_ksettings, 601 .set_link_ksettings = phy_ethtool_set_link_ksettings, 602}; 603 604#ifdef CONFIG_AX88796_93CX6 605static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom) 606{ 607 struct ei_device *ei_local = eeprom->data; 608 u8 reg = ei_inb(ei_local->mem + AX_MEMR); 609 610 eeprom->reg_data_in = reg & AX_MEMR_EEI; 611 eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */ 612 eeprom->reg_data_clock = reg & AX_MEMR_EECLK; 613 eeprom->reg_chip_select = reg & AX_MEMR_EECS; 614} 615 616static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom) 617{ 618 struct ei_device *ei_local = eeprom->data; 619 u8 reg = ei_inb(ei_local->mem + AX_MEMR); 620 621 reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS); 622 623 if (eeprom->reg_data_in) 624 reg |= AX_MEMR_EEI; 625 if (eeprom->reg_data_clock) 626 reg |= AX_MEMR_EECLK; 627 if (eeprom->reg_chip_select) 628 reg |= AX_MEMR_EECS; 629 630 ei_outb(reg, ei_local->mem + AX_MEMR); 631 udelay(10); 632} 633#endif 634 635static const struct net_device_ops ax_netdev_ops = { 636 .ndo_open = ax_open, 637 .ndo_stop = ax_close, 638 .ndo_do_ioctl = ax_ioctl, 639 640 .ndo_start_xmit = ax_ei_start_xmit, 641 .ndo_tx_timeout = ax_ei_tx_timeout, 642 .ndo_get_stats = ax_ei_get_stats, 643 .ndo_set_rx_mode = ax_ei_set_multicast_list, 644 .ndo_validate_addr = eth_validate_addr, 645 .ndo_set_mac_address = eth_mac_addr, 646#ifdef CONFIG_NET_POLL_CONTROLLER 647 .ndo_poll_controller = ax_ei_poll, 648#endif 649}; 650 651/* setup code */ 652 653static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local) 654{ 655 void __iomem *ioaddr = ei_local->mem; 656 struct ax_device *ax = to_ax_dev(dev); 657 658 /* Select page 0 */ 659 ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_STOP, ioaddr + E8390_CMD); 660 661 /* set to byte access */ 662 ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG); 663 ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17)); 664} 665 666/* 667 * ax_init_dev 668 * 669 * initialise the specified device, taking care to note the MAC 670 * address it may already have (if configured), ensure 671 * the device is ready to be used by lib8390.c and registerd with 672 * the network layer. 673 */ 674static int ax_init_dev(struct net_device *dev) 675{ 676 struct ei_device *ei_local = netdev_priv(dev); 677 struct ax_device *ax = to_ax_dev(dev); 678 void __iomem *ioaddr = ei_local->mem; 679 unsigned int start_page; 680 unsigned int stop_page; 681 int ret; 682 int i; 683 684 ret = ax_initial_check(dev); 685 if (ret) 686 goto err_out; 687 688 /* setup goes here */ 689 690 ax_initial_setup(dev, ei_local); 691 692 /* read the mac from the card prom if we need it */ 693 694 if (ax->plat->flags & AXFLG_HAS_EEPROM) { 695 unsigned char SA_prom[32]; 696 697 ei_outb(6, ioaddr + EN0_RCNTLO); 698 ei_outb(0, ioaddr + EN0_RCNTHI); 699 ei_outb(0, ioaddr + EN0_RSARLO); 700 ei_outb(0, ioaddr + EN0_RSARHI); 701 ei_outb(E8390_RREAD + E8390_START, ioaddr + NE_CMD); 702 for (i = 0; i < sizeof(SA_prom); i += 2) { 703 SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT); 704 SA_prom[i + 1] = ei_inb(ioaddr + NE_DATAPORT); 705 } 706 ei_outb(ENISR_RDC, ioaddr + EN0_ISR); /* Ack intr. */ 707 708 if (ax->plat->wordlength == 2) 709 for (i = 0; i < 16; i++) 710 SA_prom[i] = SA_prom[i+i]; 711 712 memcpy(dev->dev_addr, SA_prom, ETH_ALEN); 713 } 714 715#ifdef CONFIG_AX88796_93CX6 716 if (ax->plat->flags & AXFLG_HAS_93CX6) { 717 unsigned char mac_addr[ETH_ALEN]; 718 struct eeprom_93cx6 eeprom; 719 720 eeprom.data = ei_local; 721 eeprom.register_read = ax_eeprom_register_read; 722 eeprom.register_write = ax_eeprom_register_write; 723 eeprom.width = PCI_EEPROM_WIDTH_93C56; 724 725 eeprom_93cx6_multiread(&eeprom, 0, 726 (__le16 __force *)mac_addr, 727 sizeof(mac_addr) >> 1); 728 729 memcpy(dev->dev_addr, mac_addr, ETH_ALEN); 730 } 731#endif 732 if (ax->plat->wordlength == 2) { 733 /* We must set the 8390 for word mode. */ 734 ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG); 735 start_page = NESM_START_PG; 736 stop_page = NESM_STOP_PG; 737 } else { 738 start_page = NE1SM_START_PG; 739 stop_page = NE1SM_STOP_PG; 740 } 741 742 /* load the mac-address from the device */ 743 if (ax->plat->flags & AXFLG_MAC_FROMDEV) { 744 ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, 745 ei_local->mem + E8390_CMD); /* 0x61 */ 746 for (i = 0; i < ETH_ALEN; i++) 747 dev->dev_addr[i] = 748 ei_inb(ioaddr + EN1_PHYS_SHIFT(i)); 749 } 750 751 if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) && 752 ax->plat->mac_addr) 753 memcpy(dev->dev_addr, ax->plat->mac_addr, ETH_ALEN); 754 755 if (!is_valid_ether_addr(dev->dev_addr)) { 756 eth_hw_addr_random(dev); 757 dev_info(&dev->dev, "Using random MAC address: %pM\n", 758 dev->dev_addr); 759 } 760 761 ax_reset_8390(dev); 762 763 ei_local->name = "AX88796"; 764 ei_local->tx_start_page = start_page; 765 ei_local->stop_page = stop_page; 766 ei_local->word16 = (ax->plat->wordlength == 2); 767 ei_local->rx_start_page = start_page + TX_PAGES; 768 769#ifdef PACKETBUF_MEMSIZE 770 /* Allow the packet buffer size to be overridden by know-it-alls. */ 771 ei_local->stop_page = ei_local->tx_start_page + PACKETBUF_MEMSIZE; 772#endif 773 774 ei_local->reset_8390 = &ax_reset_8390; 775 if (ax->plat->block_input) 776 ei_local->block_input = ax->plat->block_input; 777 else 778 ei_local->block_input = &ax_block_input; 779 if (ax->plat->block_output) 780 ei_local->block_output = ax->plat->block_output; 781 else 782 ei_local->block_output = &ax_block_output; 783 ei_local->get_8390_hdr = &ax_get_8390_hdr; 784 ei_local->priv = 0; 785 786 dev->netdev_ops = &ax_netdev_ops; 787 dev->ethtool_ops = &ax_ethtool_ops; 788 789 ax_NS8390_init(dev, 0); 790 791 ret = register_netdev(dev); 792 if (ret) 793 goto err_out; 794 795 netdev_info(dev, "%dbit, irq %d, %lx, MAC: %pM\n", 796 ei_local->word16 ? 16 : 8, dev->irq, dev->base_addr, 797 dev->dev_addr); 798 799 return 0; 800 801 err_out: 802 return ret; 803} 804 805static int ax_remove(struct platform_device *pdev) 806{ 807 struct net_device *dev = platform_get_drvdata(pdev); 808 struct ei_device *ei_local = netdev_priv(dev); 809 struct ax_device *ax = to_ax_dev(dev); 810 struct resource *mem; 811 812 unregister_netdev(dev); 813 814 iounmap(ei_local->mem); 815 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 816 release_mem_region(mem->start, resource_size(mem)); 817 818 if (ax->map2) { 819 iounmap(ax->map2); 820 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); 821 release_mem_region(mem->start, resource_size(mem)); 822 } 823 824 platform_set_drvdata(pdev, NULL); 825 free_netdev(dev); 826 827 return 0; 828} 829 830/* 831 * ax_probe 832 * 833 * This is the entry point when the platform device system uses to 834 * notify us of a new device to attach to. Allocate memory, find the 835 * resources and information passed, and map the necessary registers. 836 */ 837static int ax_probe(struct platform_device *pdev) 838{ 839 struct net_device *dev; 840 struct ei_device *ei_local; 841 struct ax_device *ax; 842 struct resource *irq, *mem, *mem2; 843 unsigned long mem_size, mem2_size = 0; 844 int ret = 0; 845 846 dev = ax__alloc_ei_netdev(sizeof(struct ax_device)); 847 if (dev == NULL) 848 return -ENOMEM; 849 850 /* ok, let's setup our device */ 851 SET_NETDEV_DEV(dev, &pdev->dev); 852 ei_local = netdev_priv(dev); 853 ax = to_ax_dev(dev); 854 855 ax->plat = dev_get_platdata(&pdev->dev); 856 platform_set_drvdata(pdev, dev); 857 858 ei_local->rxcr_base = ax->plat->rcr_val; 859 860 /* find the platform resources */ 861 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 862 if (!irq) { 863 dev_err(&pdev->dev, "no IRQ specified\n"); 864 ret = -ENXIO; 865 goto exit_mem; 866 } 867 868 dev->irq = irq->start; 869 ax->irqflags = irq->flags & IRQF_TRIGGER_MASK; 870 871 if (irq->flags & IORESOURCE_IRQ_SHAREABLE) 872 ax->irqflags |= IRQF_SHARED; 873 874 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 875 if (!mem) { 876 dev_err(&pdev->dev, "no MEM specified\n"); 877 ret = -ENXIO; 878 goto exit_mem; 879 } 880 881 mem_size = resource_size(mem); 882 883 /* 884 * setup the register offsets from either the platform data or 885 * by using the size of the resource provided 886 */ 887 if (ax->plat->reg_offsets) 888 ei_local->reg_offset = ax->plat->reg_offsets; 889 else { 890 ei_local->reg_offset = ax->reg_offsets; 891 for (ret = 0; ret < 0x18; ret++) 892 ax->reg_offsets[ret] = (mem_size / 0x18) * ret; 893 } 894 895 if (!request_mem_region(mem->start, mem_size, pdev->name)) { 896 dev_err(&pdev->dev, "cannot reserve registers\n"); 897 ret = -ENXIO; 898 goto exit_mem; 899 } 900 901 ei_local->mem = ioremap(mem->start, mem_size); 902 dev->base_addr = (unsigned long)ei_local->mem; 903 904 if (ei_local->mem == NULL) { 905 dev_err(&pdev->dev, "Cannot ioremap area %pR\n", mem); 906 907 ret = -ENXIO; 908 goto exit_req; 909 } 910 911 /* look for reset area */ 912 mem2 = platform_get_resource(pdev, IORESOURCE_MEM, 1); 913 if (!mem2) { 914 if (!ax->plat->reg_offsets) { 915 for (ret = 0; ret < 0x20; ret++) 916 ax->reg_offsets[ret] = (mem_size / 0x20) * ret; 917 } 918 } else { 919 mem2_size = resource_size(mem2); 920 921 if (!request_mem_region(mem2->start, mem2_size, pdev->name)) { 922 dev_err(&pdev->dev, "cannot reserve registers\n"); 923 ret = -ENXIO; 924 goto exit_mem1; 925 } 926 927 ax->map2 = ioremap(mem2->start, mem2_size); 928 if (!ax->map2) { 929 dev_err(&pdev->dev, "cannot map reset register\n"); 930 ret = -ENXIO; 931 goto exit_mem2; 932 } 933 934 ei_local->reg_offset[0x1f] = ax->map2 - ei_local->mem; 935 } 936 937 /* got resources, now initialise and register device */ 938 ret = ax_init_dev(dev); 939 if (!ret) 940 return 0; 941 942 if (!ax->map2) 943 goto exit_mem1; 944 945 iounmap(ax->map2); 946 947 exit_mem2: 948 if (mem2) 949 release_mem_region(mem2->start, mem2_size); 950 951 exit_mem1: 952 iounmap(ei_local->mem); 953 954 exit_req: 955 release_mem_region(mem->start, mem_size); 956 957 exit_mem: 958 platform_set_drvdata(pdev, NULL); 959 free_netdev(dev); 960 961 return ret; 962} 963 964/* suspend and resume */ 965 966#ifdef CONFIG_PM 967static int ax_suspend(struct platform_device *dev, pm_message_t state) 968{ 969 struct net_device *ndev = platform_get_drvdata(dev); 970 struct ax_device *ax = to_ax_dev(ndev); 971 972 ax->resume_open = ax->running; 973 974 netif_device_detach(ndev); 975 ax_close(ndev); 976 977 return 0; 978} 979 980static int ax_resume(struct platform_device *pdev) 981{ 982 struct net_device *ndev = platform_get_drvdata(pdev); 983 struct ax_device *ax = to_ax_dev(ndev); 984 985 ax_initial_setup(ndev, netdev_priv(ndev)); 986 ax_NS8390_init(ndev, ax->resume_open); 987 netif_device_attach(ndev); 988 989 if (ax->resume_open) 990 ax_open(ndev); 991 992 return 0; 993} 994 995#else 996#define ax_suspend NULL 997#define ax_resume NULL 998#endif 999 1000static struct platform_driver axdrv = { 1001 .driver = { 1002 .name = "ax88796", 1003 }, 1004 .probe = ax_probe, 1005 .remove = ax_remove, 1006 .suspend = ax_suspend, 1007 .resume = ax_resume, 1008}; 1009 1010module_platform_driver(axdrv); 1011 1012MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver"); 1013MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); 1014MODULE_LICENSE("GPL v2"); 1015MODULE_ALIAS("platform:ax88796"); 1016