| 1 | /* |
| 2 | * Atheros AR71xx built-in ethernet mac driver |
| 3 | * |
| 4 | * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> |
| 6 | * |
| 7 | * Based on Atheros' AG7100 driver |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License version 2 as published |
| 11 | * by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include "ag71xx.h" |
| 15 | |
| 16 | #define AG71XX_DEFAULT_MSG_ENABLE \ |
| 17 | ( NETIF_MSG_DRV \ |
| 18 | | NETIF_MSG_PROBE \ |
| 19 | | NETIF_MSG_LINK \ |
| 20 | | NETIF_MSG_TIMER \ |
| 21 | | NETIF_MSG_IFDOWN \ |
| 22 | | NETIF_MSG_IFUP \ |
| 23 | | NETIF_MSG_RX_ERR \ |
| 24 | | NETIF_MSG_TX_ERR ) |
| 25 | |
| 26 | static int ag71xx_msg_level = -1; |
| 27 | |
| 28 | module_param_named(msg_level, ag71xx_msg_level, int, 0); |
| 29 | MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); |
| 30 | |
| 31 | static void ag71xx_dump_dma_regs(struct ag71xx *ag) |
| 32 | { |
| 33 | DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n", |
| 34 | ag->dev->name, |
| 35 | ag71xx_rr(ag, AG71XX_REG_TX_CTRL), |
| 36 | ag71xx_rr(ag, AG71XX_REG_TX_DESC), |
| 37 | ag71xx_rr(ag, AG71XX_REG_TX_STATUS)); |
| 38 | |
| 39 | DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n", |
| 40 | ag->dev->name, |
| 41 | ag71xx_rr(ag, AG71XX_REG_RX_CTRL), |
| 42 | ag71xx_rr(ag, AG71XX_REG_RX_DESC), |
| 43 | ag71xx_rr(ag, AG71XX_REG_RX_STATUS)); |
| 44 | } |
| 45 | |
| 46 | static void ag71xx_dump_regs(struct ag71xx *ag) |
| 47 | { |
| 48 | DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n", |
| 49 | ag->dev->name, |
| 50 | ag71xx_rr(ag, AG71XX_REG_MAC_CFG1), |
| 51 | ag71xx_rr(ag, AG71XX_REG_MAC_CFG2), |
| 52 | ag71xx_rr(ag, AG71XX_REG_MAC_IPG), |
| 53 | ag71xx_rr(ag, AG71XX_REG_MAC_HDX), |
| 54 | ag71xx_rr(ag, AG71XX_REG_MAC_MFL)); |
| 55 | DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n", |
| 56 | ag->dev->name, |
| 57 | ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL), |
| 58 | ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1), |
| 59 | ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2)); |
| 60 | DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n", |
| 61 | ag->dev->name, |
| 62 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0), |
| 63 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1), |
| 64 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2)); |
| 65 | DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n", |
| 66 | ag->dev->name, |
| 67 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3), |
| 68 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4), |
| 69 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5)); |
| 70 | } |
| 71 | |
| 72 | static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr) |
| 73 | { |
| 74 | DBG("%s: %s intr=%08x %s%s%s%s%s%s\n", |
| 75 | ag->dev->name, label, intr, |
| 76 | (intr & AG71XX_INT_TX_PS) ? "TXPS " : "", |
| 77 | (intr & AG71XX_INT_TX_UR) ? "TXUR " : "", |
| 78 | (intr & AG71XX_INT_TX_BE) ? "TXBE " : "", |
| 79 | (intr & AG71XX_INT_RX_PR) ? "RXPR " : "", |
| 80 | (intr & AG71XX_INT_RX_OF) ? "RXOF " : "", |
| 81 | (intr & AG71XX_INT_RX_BE) ? "RXBE " : ""); |
| 82 | } |
| 83 | |
| 84 | static void ag71xx_ring_free(struct ag71xx_ring *ring) |
| 85 | { |
| 86 | kfree(ring->buf); |
| 87 | |
| 88 | if (ring->descs_cpu) |
| 89 | dma_free_coherent(NULL, ring->size * ring->desc_size, |
| 90 | ring->descs_cpu, ring->descs_dma); |
| 91 | } |
| 92 | |
| 93 | static int ag71xx_ring_alloc(struct ag71xx_ring *ring, unsigned int size) |
| 94 | { |
| 95 | int err; |
| 96 | int i; |
| 97 | |
| 98 | ring->desc_size = sizeof(struct ag71xx_desc); |
| 99 | if (ring->desc_size % cache_line_size()) { |
| 100 | DBG("ag71xx: ring %p, desc size %u rounded to %u\n", |
| 101 | ring, ring->desc_size, |
| 102 | roundup(ring->desc_size, cache_line_size())); |
| 103 | ring->desc_size = roundup(ring->desc_size, cache_line_size()); |
| 104 | } |
| 105 | |
| 106 | ring->descs_cpu = dma_alloc_coherent(NULL, size * ring->desc_size, |
| 107 | &ring->descs_dma, GFP_ATOMIC); |
| 108 | if (!ring->descs_cpu) { |
| 109 | err = -ENOMEM; |
| 110 | goto err; |
| 111 | } |
| 112 | |
| 113 | ring->size = size; |
| 114 | |
| 115 | ring->buf = kzalloc(size * sizeof(*ring->buf), GFP_KERNEL); |
| 116 | if (!ring->buf) { |
| 117 | err = -ENOMEM; |
| 118 | goto err; |
| 119 | } |
| 120 | |
| 121 | for (i = 0; i < size; i++) { |
| 122 | ring->buf[i].desc = (struct ag71xx_desc *)&ring->descs_cpu[i * ring->desc_size]; |
| 123 | DBG("ag71xx: ring %p, desc %d at %p\n", |
| 124 | ring, i, ring->buf[i].desc); |
| 125 | } |
| 126 | |
| 127 | return 0; |
| 128 | |
| 129 | err: |
| 130 | return err; |
| 131 | } |
| 132 | |
| 133 | static void ag71xx_ring_tx_clean(struct ag71xx *ag) |
| 134 | { |
| 135 | struct ag71xx_ring *ring = &ag->tx_ring; |
| 136 | struct net_device *dev = ag->dev; |
| 137 | |
| 138 | while (ring->curr != ring->dirty) { |
| 139 | u32 i = ring->dirty % AG71XX_TX_RING_SIZE; |
| 140 | |
| 141 | if (!ag71xx_desc_empty(ring->buf[i].desc)) { |
| 142 | ring->buf[i].desc->ctrl = 0; |
| 143 | dev->stats.tx_errors++; |
| 144 | } |
| 145 | |
| 146 | if (ring->buf[i].skb) |
| 147 | dev_kfree_skb_any(ring->buf[i].skb); |
| 148 | |
| 149 | ring->buf[i].skb = NULL; |
| 150 | |
| 151 | ring->dirty++; |
| 152 | } |
| 153 | |
| 154 | /* flush descriptors */ |
| 155 | wmb(); |
| 156 | |
| 157 | } |
| 158 | |
| 159 | static void ag71xx_ring_tx_init(struct ag71xx *ag) |
| 160 | { |
| 161 | struct ag71xx_ring *ring = &ag->tx_ring; |
| 162 | int i; |
| 163 | |
| 164 | for (i = 0; i < AG71XX_TX_RING_SIZE; i++) { |
| 165 | ring->buf[i].desc->next = (u32) (ring->descs_dma + |
| 166 | ring->desc_size * ((i + 1) % AG71XX_TX_RING_SIZE)); |
| 167 | |
| 168 | ring->buf[i].desc->ctrl = DESC_EMPTY; |
| 169 | ring->buf[i].skb = NULL; |
| 170 | } |
| 171 | |
| 172 | /* flush descriptors */ |
| 173 | wmb(); |
| 174 | |
| 175 | ring->curr = 0; |
| 176 | ring->dirty = 0; |
| 177 | } |
| 178 | |
| 179 | static void ag71xx_ring_rx_clean(struct ag71xx *ag) |
| 180 | { |
| 181 | struct ag71xx_ring *ring = &ag->rx_ring; |
| 182 | int i; |
| 183 | |
| 184 | if (!ring->buf) |
| 185 | return; |
| 186 | |
| 187 | for (i = 0; i < AG71XX_RX_RING_SIZE; i++) |
| 188 | if (ring->buf[i].skb) { |
| 189 | dma_unmap_single(&ag->dev->dev, ring->buf[i].dma_addr, |
| 190 | AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE); |
| 191 | kfree_skb(ring->buf[i].skb); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | static int ag71xx_ring_rx_init(struct ag71xx *ag) |
| 196 | { |
| 197 | struct ag71xx_ring *ring = &ag->rx_ring; |
| 198 | unsigned int i; |
| 199 | int ret; |
| 200 | |
| 201 | ret = 0; |
| 202 | for (i = 0; i < AG71XX_RX_RING_SIZE; i++) { |
| 203 | ring->buf[i].desc->next = (u32) (ring->descs_dma + |
| 204 | ring->desc_size * ((i + 1) % AG71XX_RX_RING_SIZE)); |
| 205 | |
| 206 | DBG("ag71xx: RX desc at %p, next is %08x\n", |
| 207 | ring->buf[i].desc, |
| 208 | ring->buf[i].desc->next); |
| 209 | } |
| 210 | |
| 211 | for (i = 0; i < AG71XX_RX_RING_SIZE; i++) { |
| 212 | struct sk_buff *skb; |
| 213 | dma_addr_t dma_addr; |
| 214 | |
| 215 | skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE + AG71XX_RX_PKT_RESERVE); |
| 216 | if (!skb) { |
| 217 | ret = -ENOMEM; |
| 218 | break; |
| 219 | } |
| 220 | |
| 221 | skb->dev = ag->dev; |
| 222 | skb_reserve(skb, AG71XX_RX_PKT_RESERVE); |
| 223 | |
| 224 | dma_addr = dma_map_single(&ag->dev->dev, skb->data, |
| 225 | AG71XX_RX_PKT_SIZE, |
| 226 | DMA_FROM_DEVICE); |
| 227 | ring->buf[i].skb = skb; |
| 228 | ring->buf[i].dma_addr = dma_addr; |
| 229 | ring->buf[i].desc->data = (u32) dma_addr; |
| 230 | ring->buf[i].desc->ctrl = DESC_EMPTY; |
| 231 | } |
| 232 | |
| 233 | /* flush descriptors */ |
| 234 | wmb(); |
| 235 | |
| 236 | ring->curr = 0; |
| 237 | ring->dirty = 0; |
| 238 | |
| 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | static int ag71xx_ring_rx_refill(struct ag71xx *ag) |
| 243 | { |
| 244 | struct ag71xx_ring *ring = &ag->rx_ring; |
| 245 | unsigned int count; |
| 246 | |
| 247 | count = 0; |
| 248 | for (; ring->curr - ring->dirty > 0; ring->dirty++) { |
| 249 | unsigned int i; |
| 250 | |
| 251 | i = ring->dirty % AG71XX_RX_RING_SIZE; |
| 252 | |
| 253 | if (ring->buf[i].skb == NULL) { |
| 254 | dma_addr_t dma_addr; |
| 255 | struct sk_buff *skb; |
| 256 | |
| 257 | skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE + |
| 258 | AG71XX_RX_PKT_RESERVE); |
| 259 | if (skb == NULL) |
| 260 | break; |
| 261 | |
| 262 | skb_reserve(skb, AG71XX_RX_PKT_RESERVE); |
| 263 | skb->dev = ag->dev; |
| 264 | |
| 265 | dma_addr = dma_map_single(&ag->dev->dev, skb->data, |
| 266 | AG71XX_RX_PKT_SIZE, |
| 267 | DMA_FROM_DEVICE); |
| 268 | |
| 269 | ring->buf[i].skb = skb; |
| 270 | ring->buf[i].dma_addr = dma_addr; |
| 271 | ring->buf[i].desc->data = (u32) dma_addr; |
| 272 | } |
| 273 | |
| 274 | ring->buf[i].desc->ctrl = DESC_EMPTY; |
| 275 | count++; |
| 276 | } |
| 277 | |
| 278 | /* flush descriptors */ |
| 279 | wmb(); |
| 280 | |
| 281 | DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count); |
| 282 | |
| 283 | return count; |
| 284 | } |
| 285 | |
| 286 | static int ag71xx_rings_init(struct ag71xx *ag) |
| 287 | { |
| 288 | int ret; |
| 289 | |
| 290 | ret = ag71xx_ring_alloc(&ag->tx_ring, AG71XX_TX_RING_SIZE); |
| 291 | if (ret) |
| 292 | return ret; |
| 293 | |
| 294 | ag71xx_ring_tx_init(ag); |
| 295 | |
| 296 | ret = ag71xx_ring_alloc(&ag->rx_ring, AG71XX_RX_RING_SIZE); |
| 297 | if (ret) |
| 298 | return ret; |
| 299 | |
| 300 | ret = ag71xx_ring_rx_init(ag); |
| 301 | return ret; |
| 302 | } |
| 303 | |
| 304 | static void ag71xx_rings_cleanup(struct ag71xx *ag) |
| 305 | { |
| 306 | ag71xx_ring_rx_clean(ag); |
| 307 | ag71xx_ring_free(&ag->rx_ring); |
| 308 | |
| 309 | ag71xx_ring_tx_clean(ag); |
| 310 | ag71xx_ring_free(&ag->tx_ring); |
| 311 | } |
| 312 | |
| 313 | static unsigned char *ag71xx_speed_str(struct ag71xx *ag) |
| 314 | { |
| 315 | switch (ag->speed) { |
| 316 | case SPEED_1000: |
| 317 | return "1000"; |
| 318 | case SPEED_100: |
| 319 | return "100"; |
| 320 | case SPEED_10: |
| 321 | return "10"; |
| 322 | } |
| 323 | |
| 324 | return "?"; |
| 325 | } |
| 326 | |
| 327 | void ag71xx_link_adjust(struct ag71xx *ag) |
| 328 | { |
| 329 | struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| 330 | u32 cfg2; |
| 331 | u32 ifctl; |
| 332 | u32 fifo5; |
| 333 | u32 mii_speed; |
| 334 | |
| 335 | if (!ag->link) { |
| 336 | netif_carrier_off(ag->dev); |
| 337 | if (netif_msg_link(ag)) |
| 338 | printk(KERN_INFO "%s: link down\n", ag->dev->name); |
| 339 | return; |
| 340 | } |
| 341 | |
| 342 | cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2); |
| 343 | cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX); |
| 344 | cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0; |
| 345 | |
| 346 | ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL); |
| 347 | ifctl &= ~(MAC_IFCTL_SPEED); |
| 348 | |
| 349 | fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5); |
| 350 | fifo5 &= ~FIFO_CFG5_BM; |
| 351 | |
| 352 | switch (ag->speed) { |
| 353 | case SPEED_1000: |
| 354 | mii_speed = MII_CTRL_SPEED_1000; |
| 355 | cfg2 |= MAC_CFG2_IF_1000; |
| 356 | fifo5 |= FIFO_CFG5_BM; |
| 357 | break; |
| 358 | case SPEED_100: |
| 359 | mii_speed = MII_CTRL_SPEED_100; |
| 360 | cfg2 |= MAC_CFG2_IF_10_100; |
| 361 | ifctl |= MAC_IFCTL_SPEED; |
| 362 | break; |
| 363 | case SPEED_10: |
| 364 | mii_speed = MII_CTRL_SPEED_10; |
| 365 | cfg2 |= MAC_CFG2_IF_10_100; |
| 366 | break; |
| 367 | default: |
| 368 | BUG(); |
| 369 | return; |
| 370 | } |
| 371 | |
| 372 | if (pdata->is_ar91xx) |
| 373 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x00780fff); |
| 374 | else if (pdata->is_ar724x) |
| 375 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, pdata->fifo_cfg3); |
| 376 | else |
| 377 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff); |
| 378 | |
| 379 | if (pdata->set_pll) |
| 380 | pdata->set_pll(ag->speed); |
| 381 | |
| 382 | ag71xx_mii_ctrl_set_speed(ag, mii_speed); |
| 383 | |
| 384 | ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2); |
| 385 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5); |
| 386 | ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl); |
| 387 | |
| 388 | netif_carrier_on(ag->dev); |
| 389 | if (netif_msg_link(ag)) |
| 390 | printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n", |
| 391 | ag->dev->name, |
| 392 | ag71xx_speed_str(ag), |
| 393 | (DUPLEX_FULL == ag->duplex) ? "Full" : "Half"); |
| 394 | |
| 395 | DBG("%s: fifo_cfg0=%#x, fifo_cfg1=%#x, fifo_cfg2=%#x\n", |
| 396 | ag->dev->name, |
| 397 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0), |
| 398 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1), |
| 399 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2)); |
| 400 | |
| 401 | DBG("%s: fifo_cfg3=%#x, fifo_cfg4=%#x, fifo_cfg5=%#x\n", |
| 402 | ag->dev->name, |
| 403 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3), |
| 404 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4), |
| 405 | ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5)); |
| 406 | |
| 407 | DBG("%s: mac_cfg2=%#x, mac_ifctl=%#x, mii_ctrl=%#x\n", |
| 408 | ag->dev->name, |
| 409 | ag71xx_rr(ag, AG71XX_REG_MAC_CFG2), |
| 410 | ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL), |
| 411 | ag71xx_mii_ctrl_rr(ag)); |
| 412 | } |
| 413 | |
| 414 | static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac) |
| 415 | { |
| 416 | u32 t; |
| 417 | |
| 418 | t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16) |
| 419 | | (((u32) mac[3]) << 8) | ((u32) mac[2]); |
| 420 | |
| 421 | ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t); |
| 422 | |
| 423 | t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16); |
| 424 | ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t); |
| 425 | } |
| 426 | |
| 427 | static void ag71xx_dma_reset(struct ag71xx *ag) |
| 428 | { |
| 429 | u32 val; |
| 430 | int i; |
| 431 | |
| 432 | ag71xx_dump_dma_regs(ag); |
| 433 | |
| 434 | /* stop RX and TX */ |
| 435 | ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0); |
| 436 | ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0); |
| 437 | |
| 438 | /* |
| 439 | * give the hardware some time to really stop all rx/tx activity |
| 440 | * clearing the descriptors too early causes random memory corruption |
| 441 | */ |
| 442 | mdelay(1); |
| 443 | |
| 444 | /* clear descriptor addresses */ |
| 445 | ag71xx_wr(ag, AG71XX_REG_TX_DESC, 0); |
| 446 | ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0); |
| 447 | |
| 448 | /* clear pending RX/TX interrupts */ |
| 449 | for (i = 0; i < 256; i++) { |
| 450 | ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR); |
| 451 | ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); |
| 452 | } |
| 453 | |
| 454 | /* clear pending errors */ |
| 455 | ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF); |
| 456 | ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR); |
| 457 | |
| 458 | val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS); |
| 459 | if (val) |
| 460 | printk(KERN_ALERT "%s: unable to clear DMA Rx status: %08x\n", |
| 461 | ag->dev->name, val); |
| 462 | |
| 463 | val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS); |
| 464 | |
| 465 | /* mask out reserved bits */ |
| 466 | val &= ~0xff000000; |
| 467 | |
| 468 | if (val) |
| 469 | printk(KERN_ALERT "%s: unable to clear DMA Tx status: %08x\n", |
| 470 | ag->dev->name, val); |
| 471 | |
| 472 | ag71xx_dump_dma_regs(ag); |
| 473 | } |
| 474 | |
| 475 | #define MAC_CFG1_INIT (MAC_CFG1_RXE | MAC_CFG1_TXE | \ |
| 476 | MAC_CFG1_SRX | MAC_CFG1_STX) |
| 477 | |
| 478 | #define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT) |
| 479 | |
| 480 | #define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \ |
| 481 | FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \ |
| 482 | FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \ |
| 483 | FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \ |
| 484 | FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \ |
| 485 | FIFO_CFG4_VT) |
| 486 | |
| 487 | #define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \ |
| 488 | FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \ |
| 489 | FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \ |
| 490 | FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \ |
| 491 | FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \ |
| 492 | FIFO_CFG5_17 | FIFO_CFG5_SF) |
| 493 | |
| 494 | static void ag71xx_hw_init(struct ag71xx *ag) |
| 495 | { |
| 496 | struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| 497 | |
| 498 | ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR); |
| 499 | udelay(20); |
| 500 | |
| 501 | ar71xx_device_stop(pdata->reset_bit); |
| 502 | mdelay(100); |
| 503 | ar71xx_device_start(pdata->reset_bit); |
| 504 | mdelay(100); |
| 505 | |
| 506 | /* setup MAC configuration registers */ |
| 507 | if (pdata->is_ar724x) |
| 508 | ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, |
| 509 | MAC_CFG1_INIT | MAC_CFG1_TFC | MAC_CFG1_RFC); |
| 510 | else |
| 511 | ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT); |
| 512 | |
| 513 | ag71xx_sb(ag, AG71XX_REG_MAC_CFG2, |
| 514 | MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK); |
| 515 | |
| 516 | /* setup max frame length */ |
| 517 | ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN); |
| 518 | |
| 519 | /* setup MII interface type */ |
| 520 | ag71xx_mii_ctrl_set_if(ag, pdata->mii_if); |
| 521 | |
| 522 | /* setup FIFO configuration registers */ |
| 523 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT); |
| 524 | if (pdata->is_ar724x) { |
| 525 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, pdata->fifo_cfg1); |
| 526 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, pdata->fifo_cfg2); |
| 527 | } else { |
| 528 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000); |
| 529 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff); |
| 530 | } |
| 531 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT); |
| 532 | ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT); |
| 533 | |
| 534 | ag71xx_dma_reset(ag); |
| 535 | } |
| 536 | |
| 537 | static void ag71xx_hw_start(struct ag71xx *ag) |
| 538 | { |
| 539 | /* start RX engine */ |
| 540 | ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE); |
| 541 | |
| 542 | /* enable interrupts */ |
| 543 | ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT); |
| 544 | } |
| 545 | |
| 546 | static void ag71xx_hw_stop(struct ag71xx *ag) |
| 547 | { |
| 548 | /* disable all interrupts */ |
| 549 | ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0); |
| 550 | |
| 551 | ag71xx_dma_reset(ag); |
| 552 | } |
| 553 | |
| 554 | static int ag71xx_open(struct net_device *dev) |
| 555 | { |
| 556 | struct ag71xx *ag = netdev_priv(dev); |
| 557 | struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| 558 | int ret; |
| 559 | |
| 560 | ret = ag71xx_rings_init(ag); |
| 561 | if (ret) |
| 562 | goto err; |
| 563 | |
| 564 | if (pdata->is_ar724x) |
| 565 | ag71xx_hw_init(ag); |
| 566 | |
| 567 | napi_enable(&ag->napi); |
| 568 | |
| 569 | netif_carrier_off(dev); |
| 570 | ag71xx_phy_start(ag); |
| 571 | |
| 572 | ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma); |
| 573 | ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma); |
| 574 | |
| 575 | ag71xx_hw_set_macaddr(ag, dev->dev_addr); |
| 576 | |
| 577 | ag71xx_hw_start(ag); |
| 578 | |
| 579 | netif_start_queue(dev); |
| 580 | |
| 581 | return 0; |
| 582 | |
| 583 | err: |
| 584 | ag71xx_rings_cleanup(ag); |
| 585 | return ret; |
| 586 | } |
| 587 | |
| 588 | static int ag71xx_stop(struct net_device *dev) |
| 589 | { |
| 590 | struct ag71xx *ag = netdev_priv(dev); |
| 591 | unsigned long flags; |
| 592 | |
| 593 | netif_carrier_off(dev); |
| 594 | ag71xx_phy_stop(ag); |
| 595 | |
| 596 | spin_lock_irqsave(&ag->lock, flags); |
| 597 | |
| 598 | netif_stop_queue(dev); |
| 599 | |
| 600 | ag71xx_hw_stop(ag); |
| 601 | |
| 602 | napi_disable(&ag->napi); |
| 603 | del_timer_sync(&ag->oom_timer); |
| 604 | |
| 605 | spin_unlock_irqrestore(&ag->lock, flags); |
| 606 | |
| 607 | ag71xx_rings_cleanup(ag); |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb, |
| 613 | struct net_device *dev) |
| 614 | { |
| 615 | struct ag71xx *ag = netdev_priv(dev); |
| 616 | struct ag71xx_ring *ring = &ag->tx_ring; |
| 617 | struct ag71xx_desc *desc; |
| 618 | dma_addr_t dma_addr; |
| 619 | int i; |
| 620 | |
| 621 | i = ring->curr % AG71XX_TX_RING_SIZE; |
| 622 | desc = ring->buf[i].desc; |
| 623 | |
| 624 | if (!ag71xx_desc_empty(desc)) |
| 625 | goto err_drop; |
| 626 | |
| 627 | if (ag71xx_has_ar8216(ag)) |
| 628 | ag71xx_add_ar8216_header(ag, skb); |
| 629 | |
| 630 | if (skb->len <= 0) { |
| 631 | DBG("%s: packet len is too small\n", ag->dev->name); |
| 632 | goto err_drop; |
| 633 | } |
| 634 | |
| 635 | dma_addr = dma_map_single(&dev->dev, skb->data, skb->len, |
| 636 | DMA_TO_DEVICE); |
| 637 | |
| 638 | ring->buf[i].skb = skb; |
| 639 | |
| 640 | /* setup descriptor fields */ |
| 641 | desc->data = (u32) dma_addr; |
| 642 | desc->ctrl = (skb->len & DESC_PKTLEN_M); |
| 643 | |
| 644 | /* flush descriptor */ |
| 645 | wmb(); |
| 646 | |
| 647 | ring->curr++; |
| 648 | if (ring->curr == (ring->dirty + AG71XX_TX_THRES_STOP)) { |
| 649 | DBG("%s: tx queue full\n", ag->dev->name); |
| 650 | netif_stop_queue(dev); |
| 651 | } |
| 652 | |
| 653 | DBG("%s: packet injected into TX queue\n", ag->dev->name); |
| 654 | |
| 655 | /* enable TX engine */ |
| 656 | ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE); |
| 657 | |
| 658 | return NETDEV_TX_OK; |
| 659 | |
| 660 | err_drop: |
| 661 | dev->stats.tx_dropped++; |
| 662 | |
| 663 | dev_kfree_skb(skb); |
| 664 | return NETDEV_TX_OK; |
| 665 | } |
| 666 | |
| 667 | static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 668 | { |
| 669 | struct mii_ioctl_data *data = (struct mii_ioctl_data *) &ifr->ifr_data; |
| 670 | struct ag71xx *ag = netdev_priv(dev); |
| 671 | int ret; |
| 672 | |
| 673 | switch (cmd) { |
| 674 | case SIOCETHTOOL: |
| 675 | if (ag->phy_dev == NULL) |
| 676 | break; |
| 677 | |
| 678 | spin_lock_irq(&ag->lock); |
| 679 | ret = phy_ethtool_ioctl(ag->phy_dev, (void *) ifr->ifr_data); |
| 680 | spin_unlock_irq(&ag->lock); |
| 681 | return ret; |
| 682 | |
| 683 | case SIOCSIFHWADDR: |
| 684 | if (copy_from_user |
| 685 | (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr))) |
| 686 | return -EFAULT; |
| 687 | return 0; |
| 688 | |
| 689 | case SIOCGIFHWADDR: |
| 690 | if (copy_to_user |
| 691 | (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr))) |
| 692 | return -EFAULT; |
| 693 | return 0; |
| 694 | |
| 695 | case SIOCGMIIPHY: |
| 696 | case SIOCGMIIREG: |
| 697 | case SIOCSMIIREG: |
| 698 | if (ag->phy_dev == NULL) |
| 699 | break; |
| 700 | |
| 701 | return phy_mii_ioctl(ag->phy_dev, data, cmd); |
| 702 | |
| 703 | default: |
| 704 | break; |
| 705 | } |
| 706 | |
| 707 | return -EOPNOTSUPP; |
| 708 | } |
| 709 | |
| 710 | static void ag71xx_oom_timer_handler(unsigned long data) |
| 711 | { |
| 712 | struct net_device *dev = (struct net_device *) data; |
| 713 | struct ag71xx *ag = netdev_priv(dev); |
| 714 | |
| 715 | napi_schedule(&ag->napi); |
| 716 | } |
| 717 | |
| 718 | static void ag71xx_tx_timeout(struct net_device *dev) |
| 719 | { |
| 720 | struct ag71xx *ag = netdev_priv(dev); |
| 721 | |
| 722 | if (netif_msg_tx_err(ag)) |
| 723 | printk(KERN_DEBUG "%s: tx timeout\n", ag->dev->name); |
| 724 | |
| 725 | schedule_work(&ag->restart_work); |
| 726 | } |
| 727 | |
| 728 | static void ag71xx_restart_work_func(struct work_struct *work) |
| 729 | { |
| 730 | struct ag71xx *ag = container_of(work, struct ag71xx, restart_work); |
| 731 | |
| 732 | ag71xx_stop(ag->dev); |
| 733 | ag71xx_open(ag->dev); |
| 734 | } |
| 735 | |
| 736 | static int ag71xx_tx_packets(struct ag71xx *ag) |
| 737 | { |
| 738 | struct ag71xx_ring *ring = &ag->tx_ring; |
| 739 | int sent; |
| 740 | |
| 741 | DBG("%s: processing TX ring\n", ag->dev->name); |
| 742 | |
| 743 | sent = 0; |
| 744 | while (ring->dirty != ring->curr) { |
| 745 | unsigned int i = ring->dirty % AG71XX_TX_RING_SIZE; |
| 746 | struct ag71xx_desc *desc = ring->buf[i].desc; |
| 747 | struct sk_buff *skb = ring->buf[i].skb; |
| 748 | |
| 749 | if (!ag71xx_desc_empty(desc)) |
| 750 | break; |
| 751 | |
| 752 | ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); |
| 753 | |
| 754 | ag->dev->stats.tx_bytes += skb->len; |
| 755 | ag->dev->stats.tx_packets++; |
| 756 | |
| 757 | dev_kfree_skb_any(skb); |
| 758 | ring->buf[i].skb = NULL; |
| 759 | |
| 760 | ring->dirty++; |
| 761 | sent++; |
| 762 | } |
| 763 | |
| 764 | DBG("%s: %d packets sent out\n", ag->dev->name, sent); |
| 765 | |
| 766 | if ((ring->curr - ring->dirty) < AG71XX_TX_THRES_WAKEUP) |
| 767 | netif_wake_queue(ag->dev); |
| 768 | |
| 769 | return sent; |
| 770 | } |
| 771 | |
| 772 | static int ag71xx_rx_copy_skb(struct ag71xx *ag, struct sk_buff **pskb, |
| 773 | int pktlen) |
| 774 | { |
| 775 | struct sk_buff *copy_skb; |
| 776 | |
| 777 | if (ag->phy_dev && (ag->phy_dev->pkt_align % 4) == 2) |
| 778 | goto keep; |
| 779 | |
| 780 | copy_skb = netdev_alloc_skb(ag->dev, pktlen + NET_IP_ALIGN); |
| 781 | if (!copy_skb) |
| 782 | return -ENOMEM; |
| 783 | |
| 784 | skb_reserve(copy_skb, NET_IP_ALIGN); |
| 785 | skb_copy_from_linear_data(*pskb, copy_skb->data, pktlen); |
| 786 | skb_put(copy_skb, pktlen); |
| 787 | |
| 788 | dev_kfree_skb_any(*pskb); |
| 789 | *pskb = copy_skb; |
| 790 | |
| 791 | return 0; |
| 792 | |
| 793 | keep: |
| 794 | skb_put(*pskb, pktlen); |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | static int ag71xx_rx_packets(struct ag71xx *ag, int limit) |
| 799 | { |
| 800 | struct net_device *dev = ag->dev; |
| 801 | struct ag71xx_ring *ring = &ag->rx_ring; |
| 802 | int done = 0; |
| 803 | |
| 804 | DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n", |
| 805 | dev->name, limit, ring->curr, ring->dirty); |
| 806 | |
| 807 | while (done < limit) { |
| 808 | unsigned int i = ring->curr % AG71XX_RX_RING_SIZE; |
| 809 | struct ag71xx_desc *desc = ring->buf[i].desc; |
| 810 | struct sk_buff *skb; |
| 811 | int pktlen; |
| 812 | int err = 0; |
| 813 | |
| 814 | if (ag71xx_desc_empty(desc)) |
| 815 | break; |
| 816 | |
| 817 | if ((ring->dirty + AG71XX_RX_RING_SIZE) == ring->curr) { |
| 818 | ag71xx_assert(0); |
| 819 | break; |
| 820 | } |
| 821 | |
| 822 | ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR); |
| 823 | |
| 824 | skb = ring->buf[i].skb; |
| 825 | pktlen = ag71xx_desc_pktlen(desc); |
| 826 | pktlen -= ETH_FCS_LEN; |
| 827 | |
| 828 | dma_unmap_single(&dev->dev, ring->buf[i].dma_addr, |
| 829 | AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE); |
| 830 | |
| 831 | dev->last_rx = jiffies; |
| 832 | dev->stats.rx_packets++; |
| 833 | dev->stats.rx_bytes += pktlen; |
| 834 | |
| 835 | if (ag71xx_has_ar8216(ag)) |
| 836 | err = ag71xx_remove_ar8216_header(ag, skb, pktlen); |
| 837 | else |
| 838 | err = ag71xx_rx_copy_skb(ag, &skb, pktlen); |
| 839 | |
| 840 | if (err) { |
| 841 | dev->stats.rx_dropped++; |
| 842 | kfree_skb(skb); |
| 843 | } else { |
| 844 | skb->dev = dev; |
| 845 | skb->ip_summed = CHECKSUM_NONE; |
| 846 | if (ag->phy_dev) { |
| 847 | ag->phy_dev->netif_receive_skb(skb); |
| 848 | } else { |
| 849 | skb->protocol = eth_type_trans(skb, dev); |
| 850 | netif_receive_skb(skb); |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | ring->buf[i].skb = NULL; |
| 855 | done++; |
| 856 | |
| 857 | ring->curr++; |
| 858 | } |
| 859 | |
| 860 | ag71xx_ring_rx_refill(ag); |
| 861 | |
| 862 | DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n", |
| 863 | dev->name, ring->curr, ring->dirty, done); |
| 864 | |
| 865 | return done; |
| 866 | } |
| 867 | |
| 868 | static int ag71xx_poll(struct napi_struct *napi, int limit) |
| 869 | { |
| 870 | struct ag71xx *ag = container_of(napi, struct ag71xx, napi); |
| 871 | struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| 872 | struct net_device *dev = ag->dev; |
| 873 | struct ag71xx_ring *rx_ring; |
| 874 | unsigned long flags; |
| 875 | u32 status; |
| 876 | int tx_done; |
| 877 | int rx_done; |
| 878 | |
| 879 | pdata->ddr_flush(); |
| 880 | tx_done = ag71xx_tx_packets(ag); |
| 881 | |
| 882 | DBG("%s: processing RX ring\n", dev->name); |
| 883 | rx_done = ag71xx_rx_packets(ag, limit); |
| 884 | |
| 885 | ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done); |
| 886 | |
| 887 | rx_ring = &ag->rx_ring; |
| 888 | if (rx_ring->buf[rx_ring->dirty % AG71XX_RX_RING_SIZE].skb == NULL) |
| 889 | goto oom; |
| 890 | |
| 891 | status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS); |
| 892 | if (unlikely(status & RX_STATUS_OF)) { |
| 893 | ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF); |
| 894 | dev->stats.rx_fifo_errors++; |
| 895 | |
| 896 | /* restart RX */ |
| 897 | ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE); |
| 898 | } |
| 899 | |
| 900 | if (rx_done < limit) { |
| 901 | if (status & RX_STATUS_PR) |
| 902 | goto more; |
| 903 | |
| 904 | status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS); |
| 905 | if (status & TX_STATUS_PS) |
| 906 | goto more; |
| 907 | |
| 908 | DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n", |
| 909 | dev->name, rx_done, tx_done, limit); |
| 910 | |
| 911 | napi_complete(napi); |
| 912 | |
| 913 | /* enable interrupts */ |
| 914 | spin_lock_irqsave(&ag->lock, flags); |
| 915 | ag71xx_int_enable(ag, AG71XX_INT_POLL); |
| 916 | spin_unlock_irqrestore(&ag->lock, flags); |
| 917 | return rx_done; |
| 918 | } |
| 919 | |
| 920 | more: |
| 921 | DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n", |
| 922 | dev->name, rx_done, tx_done, limit); |
| 923 | return rx_done; |
| 924 | |
| 925 | oom: |
| 926 | if (netif_msg_rx_err(ag)) |
| 927 | printk(KERN_DEBUG "%s: out of memory\n", dev->name); |
| 928 | |
| 929 | mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL); |
| 930 | napi_complete(napi); |
| 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | static irqreturn_t ag71xx_interrupt(int irq, void *dev_id) |
| 935 | { |
| 936 | struct net_device *dev = dev_id; |
| 937 | struct ag71xx *ag = netdev_priv(dev); |
| 938 | u32 status; |
| 939 | |
| 940 | status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS); |
| 941 | ag71xx_dump_intr(ag, "raw", status); |
| 942 | |
| 943 | if (unlikely(!status)) |
| 944 | return IRQ_NONE; |
| 945 | |
| 946 | if (unlikely(status & AG71XX_INT_ERR)) { |
| 947 | if (status & AG71XX_INT_TX_BE) { |
| 948 | ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE); |
| 949 | dev_err(&dev->dev, "TX BUS error\n"); |
| 950 | } |
| 951 | if (status & AG71XX_INT_RX_BE) { |
| 952 | ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE); |
| 953 | dev_err(&dev->dev, "RX BUS error\n"); |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | if (likely(status & AG71XX_INT_POLL)) { |
| 958 | ag71xx_int_disable(ag, AG71XX_INT_POLL); |
| 959 | DBG("%s: enable polling mode\n", dev->name); |
| 960 | napi_schedule(&ag->napi); |
| 961 | } |
| 962 | |
| 963 | ag71xx_debugfs_update_int_stats(ag, status); |
| 964 | |
| 965 | return IRQ_HANDLED; |
| 966 | } |
| 967 | |
| 968 | static void ag71xx_set_multicast_list(struct net_device *dev) |
| 969 | { |
| 970 | /* TODO */ |
| 971 | } |
| 972 | |
| 973 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 974 | /* |
| 975 | * Polling 'interrupt' - used by things like netconsole to send skbs |
| 976 | * without having to re-enable interrupts. It's not called while |
| 977 | * the interrupt routine is executing. |
| 978 | */ |
| 979 | static void ag71xx_netpoll(struct net_device *dev) |
| 980 | { |
| 981 | disable_irq(dev->irq); |
| 982 | ag71xx_interrupt(dev->irq, dev); |
| 983 | enable_irq(dev->irq); |
| 984 | } |
| 985 | #endif |
| 986 | |
| 987 | static const struct net_device_ops ag71xx_netdev_ops = { |
| 988 | .ndo_open = ag71xx_open, |
| 989 | .ndo_stop = ag71xx_stop, |
| 990 | .ndo_start_xmit = ag71xx_hard_start_xmit, |
| 991 | .ndo_set_multicast_list = ag71xx_set_multicast_list, |
| 992 | .ndo_do_ioctl = ag71xx_do_ioctl, |
| 993 | .ndo_tx_timeout = ag71xx_tx_timeout, |
| 994 | .ndo_change_mtu = eth_change_mtu, |
| 995 | .ndo_set_mac_address = eth_mac_addr, |
| 996 | .ndo_validate_addr = eth_validate_addr, |
| 997 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 998 | .ndo_poll_controller = ag71xx_netpoll, |
| 999 | #endif |
| 1000 | }; |
| 1001 | |
| 1002 | static int __init ag71xx_probe(struct platform_device *pdev) |
| 1003 | { |
| 1004 | struct net_device *dev; |
| 1005 | struct resource *res; |
| 1006 | struct ag71xx *ag; |
| 1007 | struct ag71xx_platform_data *pdata; |
| 1008 | int err; |
| 1009 | |
| 1010 | pdata = pdev->dev.platform_data; |
| 1011 | if (!pdata) { |
| 1012 | dev_err(&pdev->dev, "no platform data specified\n"); |
| 1013 | err = -ENXIO; |
| 1014 | goto err_out; |
| 1015 | } |
| 1016 | |
| 1017 | if (pdata->mii_bus_dev == NULL) { |
| 1018 | dev_err(&pdev->dev, "no MII bus device specified\n"); |
| 1019 | err = -EINVAL; |
| 1020 | goto err_out; |
| 1021 | } |
| 1022 | |
| 1023 | dev = alloc_etherdev(sizeof(*ag)); |
| 1024 | if (!dev) { |
| 1025 | dev_err(&pdev->dev, "alloc_etherdev failed\n"); |
| 1026 | err = -ENOMEM; |
| 1027 | goto err_out; |
| 1028 | } |
| 1029 | |
| 1030 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 1031 | |
| 1032 | ag = netdev_priv(dev); |
| 1033 | ag->pdev = pdev; |
| 1034 | ag->dev = dev; |
| 1035 | ag->msg_enable = netif_msg_init(ag71xx_msg_level, |
| 1036 | AG71XX_DEFAULT_MSG_ENABLE); |
| 1037 | spin_lock_init(&ag->lock); |
| 1038 | |
| 1039 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac_base"); |
| 1040 | if (!res) { |
| 1041 | dev_err(&pdev->dev, "no mac_base resource found\n"); |
| 1042 | err = -ENXIO; |
| 1043 | goto err_out; |
| 1044 | } |
| 1045 | |
| 1046 | ag->mac_base = ioremap_nocache(res->start, res->end - res->start + 1); |
| 1047 | if (!ag->mac_base) { |
| 1048 | dev_err(&pdev->dev, "unable to ioremap mac_base\n"); |
| 1049 | err = -ENOMEM; |
| 1050 | goto err_free_dev; |
| 1051 | } |
| 1052 | |
| 1053 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mii_ctrl"); |
| 1054 | if (!res) { |
| 1055 | dev_err(&pdev->dev, "no mii_ctrl resource found\n"); |
| 1056 | err = -ENXIO; |
| 1057 | goto err_unmap_base; |
| 1058 | } |
| 1059 | |
| 1060 | ag->mii_ctrl = ioremap_nocache(res->start, res->end - res->start + 1); |
| 1061 | if (!ag->mii_ctrl) { |
| 1062 | dev_err(&pdev->dev, "unable to ioremap mii_ctrl\n"); |
| 1063 | err = -ENOMEM; |
| 1064 | goto err_unmap_base; |
| 1065 | } |
| 1066 | |
| 1067 | dev->irq = platform_get_irq(pdev, 0); |
| 1068 | err = request_irq(dev->irq, ag71xx_interrupt, |
| 1069 | IRQF_DISABLED | IRQF_SAMPLE_RANDOM, |
| 1070 | dev->name, dev); |
| 1071 | if (err) { |
| 1072 | dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq); |
| 1073 | goto err_unmap_mii_ctrl; |
| 1074 | } |
| 1075 | |
| 1076 | dev->base_addr = (unsigned long)ag->mac_base; |
| 1077 | dev->netdev_ops = &ag71xx_netdev_ops; |
| 1078 | dev->ethtool_ops = &ag71xx_ethtool_ops; |
| 1079 | |
| 1080 | INIT_WORK(&ag->restart_work, ag71xx_restart_work_func); |
| 1081 | |
| 1082 | init_timer(&ag->oom_timer); |
| 1083 | ag->oom_timer.data = (unsigned long) dev; |
| 1084 | ag->oom_timer.function = ag71xx_oom_timer_handler; |
| 1085 | |
| 1086 | memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN); |
| 1087 | |
| 1088 | netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT); |
| 1089 | |
| 1090 | err = register_netdev(dev); |
| 1091 | if (err) { |
| 1092 | dev_err(&pdev->dev, "unable to register net device\n"); |
| 1093 | goto err_free_irq; |
| 1094 | } |
| 1095 | |
| 1096 | printk(KERN_INFO "%s: Atheros AG71xx at 0x%08lx, irq %d\n", |
| 1097 | dev->name, dev->base_addr, dev->irq); |
| 1098 | |
| 1099 | ag71xx_dump_regs(ag); |
| 1100 | |
| 1101 | ag71xx_hw_init(ag); |
| 1102 | |
| 1103 | ag71xx_dump_regs(ag); |
| 1104 | |
| 1105 | err = ag71xx_phy_connect(ag); |
| 1106 | if (err) |
| 1107 | goto err_unregister_netdev; |
| 1108 | |
| 1109 | err = ag71xx_debugfs_init(ag); |
| 1110 | if (err) |
| 1111 | goto err_phy_disconnect; |
| 1112 | |
| 1113 | platform_set_drvdata(pdev, dev); |
| 1114 | |
| 1115 | return 0; |
| 1116 | |
| 1117 | err_phy_disconnect: |
| 1118 | ag71xx_phy_disconnect(ag); |
| 1119 | err_unregister_netdev: |
| 1120 | unregister_netdev(dev); |
| 1121 | err_free_irq: |
| 1122 | free_irq(dev->irq, dev); |
| 1123 | err_unmap_mii_ctrl: |
| 1124 | iounmap(ag->mii_ctrl); |
| 1125 | err_unmap_base: |
| 1126 | iounmap(ag->mac_base); |
| 1127 | err_free_dev: |
| 1128 | kfree(dev); |
| 1129 | err_out: |
| 1130 | platform_set_drvdata(pdev, NULL); |
| 1131 | return err; |
| 1132 | } |
| 1133 | |
| 1134 | static int __exit ag71xx_remove(struct platform_device *pdev) |
| 1135 | { |
| 1136 | struct net_device *dev = platform_get_drvdata(pdev); |
| 1137 | |
| 1138 | if (dev) { |
| 1139 | struct ag71xx *ag = netdev_priv(dev); |
| 1140 | |
| 1141 | ag71xx_debugfs_exit(ag); |
| 1142 | ag71xx_phy_disconnect(ag); |
| 1143 | unregister_netdev(dev); |
| 1144 | free_irq(dev->irq, dev); |
| 1145 | iounmap(ag->mii_ctrl); |
| 1146 | iounmap(ag->mac_base); |
| 1147 | kfree(dev); |
| 1148 | platform_set_drvdata(pdev, NULL); |
| 1149 | } |
| 1150 | |
| 1151 | return 0; |
| 1152 | } |
| 1153 | |
| 1154 | static struct platform_driver ag71xx_driver = { |
| 1155 | .probe = ag71xx_probe, |
| 1156 | .remove = __exit_p(ag71xx_remove), |
| 1157 | .driver = { |
| 1158 | .name = AG71XX_DRV_NAME, |
| 1159 | } |
| 1160 | }; |
| 1161 | |
| 1162 | static int __init ag71xx_module_init(void) |
| 1163 | { |
| 1164 | int ret; |
| 1165 | |
| 1166 | ret = ag71xx_debugfs_root_init(); |
| 1167 | if (ret) |
| 1168 | goto err_out; |
| 1169 | |
| 1170 | ret = ag71xx_mdio_driver_init(); |
| 1171 | if (ret) |
| 1172 | goto err_debugfs_exit; |
| 1173 | |
| 1174 | ret = platform_driver_register(&ag71xx_driver); |
| 1175 | if (ret) |
| 1176 | goto err_mdio_exit; |
| 1177 | |
| 1178 | return 0; |
| 1179 | |
| 1180 | err_mdio_exit: |
| 1181 | ag71xx_mdio_driver_exit(); |
| 1182 | err_debugfs_exit: |
| 1183 | ag71xx_debugfs_root_exit(); |
| 1184 | err_out: |
| 1185 | return ret; |
| 1186 | } |
| 1187 | |
| 1188 | static void __exit ag71xx_module_exit(void) |
| 1189 | { |
| 1190 | platform_driver_unregister(&ag71xx_driver); |
| 1191 | ag71xx_mdio_driver_exit(); |
| 1192 | ag71xx_debugfs_root_exit(); |
| 1193 | } |
| 1194 | |
| 1195 | module_init(ag71xx_module_init); |
| 1196 | module_exit(ag71xx_module_exit); |
| 1197 | |
| 1198 | MODULE_VERSION(AG71XX_DRV_VERSION); |
| 1199 | MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); |
| 1200 | MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); |
| 1201 | MODULE_LICENSE("GPL v2"); |
| 1202 | MODULE_ALIAS("platform:" AG71XX_DRV_NAME); |
| 1203 | |
