Daniel Silverstone | 7a3c66e | 2008-12-11 21:00:29 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Micrel KS8695 (Centaur) Ethernet. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License as |
| 6 | * published by the Free Software Foundation; either version 2 of the |
| 7 | * License, or (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * Copyright 2008 Simtec Electronics |
| 15 | * Daniel Silverstone <dsilvers@simtec.co.uk> |
| 16 | * Vincent Sanders <vince@simtec.co.uk> |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/ioport.h> |
| 21 | #include <linux/netdevice.h> |
| 22 | #include <linux/etherdevice.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/skbuff.h> |
| 25 | #include <linux/spinlock.h> |
| 26 | #include <linux/crc32.h> |
| 27 | #include <linux/mii.h> |
| 28 | #include <linux/ethtool.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/platform_device.h> |
| 31 | #include <linux/irq.h> |
Daniel Silverstone | 7a3c66e | 2008-12-11 21:00:29 -0800 | [diff] [blame] | 32 | #include <linux/io.h> |
| 33 | |
| 34 | #include <asm/irq.h> |
| 35 | |
| 36 | #include <mach/regs-switch.h> |
| 37 | #include <mach/regs-misc.h> |
| 38 | |
| 39 | #include "ks8695net.h" |
| 40 | |
| 41 | #define MODULENAME "ks8695_ether" |
| 42 | #define MODULEVERSION "1.01" |
| 43 | |
| 44 | /* |
| 45 | * Transmit and device reset timeout, default 5 seconds. |
| 46 | */ |
| 47 | static int watchdog = 5000; |
| 48 | |
| 49 | /* Hardware structures */ |
| 50 | |
| 51 | /** |
| 52 | * struct rx_ring_desc - Receive descriptor ring element |
| 53 | * @status: The status of the descriptor element (E.g. who owns it) |
| 54 | * @length: The number of bytes in the block pointed to by data_ptr |
| 55 | * @data_ptr: The physical address of the data block to receive into |
| 56 | * @next_desc: The physical address of the next descriptor element. |
| 57 | */ |
| 58 | struct rx_ring_desc { |
| 59 | __le32 status; |
| 60 | __le32 length; |
| 61 | __le32 data_ptr; |
| 62 | __le32 next_desc; |
| 63 | }; |
| 64 | |
| 65 | /** |
| 66 | * struct tx_ring_desc - Transmit descriptor ring element |
| 67 | * @owner: Who owns the descriptor |
| 68 | * @status: The number of bytes in the block pointed to by data_ptr |
| 69 | * @data_ptr: The physical address of the data block to receive into |
| 70 | * @next_desc: The physical address of the next descriptor element. |
| 71 | */ |
| 72 | struct tx_ring_desc { |
| 73 | __le32 owner; |
| 74 | __le32 status; |
| 75 | __le32 data_ptr; |
| 76 | __le32 next_desc; |
| 77 | }; |
| 78 | |
| 79 | /** |
| 80 | * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. |
| 81 | * @skb: The buffer in the ring |
| 82 | * @dma_ptr: The mapped DMA pointer of the buffer |
| 83 | * @length: The number of bytes mapped to dma_ptr |
| 84 | */ |
| 85 | struct ks8695_skbuff { |
| 86 | struct sk_buff *skb; |
| 87 | dma_addr_t dma_ptr; |
| 88 | u32 length; |
| 89 | }; |
| 90 | |
| 91 | /* Private device structure */ |
| 92 | |
| 93 | #define MAX_TX_DESC 8 |
| 94 | #define MAX_TX_DESC_MASK 0x7 |
| 95 | #define MAX_RX_DESC 16 |
| 96 | #define MAX_RX_DESC_MASK 0xf |
| 97 | |
| 98 | #define MAX_RXBUF_SIZE 0x700 |
| 99 | |
| 100 | #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) |
| 101 | #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) |
| 102 | #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) |
| 103 | |
| 104 | /** |
| 105 | * enum ks8695_dtype - Device type |
| 106 | * @KS8695_DTYPE_WAN: This device is a WAN interface |
| 107 | * @KS8695_DTYPE_LAN: This device is a LAN interface |
| 108 | * @KS8695_DTYPE_HPNA: This device is an HPNA interface |
| 109 | */ |
| 110 | enum ks8695_dtype { |
| 111 | KS8695_DTYPE_WAN, |
| 112 | KS8695_DTYPE_LAN, |
| 113 | KS8695_DTYPE_HPNA, |
| 114 | }; |
| 115 | |
| 116 | /** |
| 117 | * struct ks8695_priv - Private data for the KS8695 Ethernet |
| 118 | * @in_suspend: Flag to indicate if we're suspending/resuming |
| 119 | * @ndev: The net_device for this interface |
| 120 | * @dev: The platform device object for this interface |
| 121 | * @dtype: The type of this device |
| 122 | * @io_regs: The ioremapped registers for this interface |
| 123 | * @rx_irq_name: The textual name of the RX IRQ from the platform data |
| 124 | * @tx_irq_name: The textual name of the TX IRQ from the platform data |
| 125 | * @link_irq_name: The textual name of the link IRQ from the |
| 126 | * platform data if available |
| 127 | * @rx_irq: The IRQ number for the RX IRQ |
| 128 | * @tx_irq: The IRQ number for the TX IRQ |
| 129 | * @link_irq: The IRQ number for the link IRQ if available |
| 130 | * @regs_req: The resource request for the registers region |
| 131 | * @phyiface_req: The resource request for the phy/switch region |
| 132 | * if available |
| 133 | * @phyiface_regs: The ioremapped registers for the phy/switch if available |
| 134 | * @ring_base: The base pointer of the dma coherent memory for the rings |
| 135 | * @ring_base_dma: The DMA mapped equivalent of ring_base |
| 136 | * @tx_ring: The pointer in ring_base of the TX ring |
| 137 | * @tx_ring_used: The number of slots in the TX ring which are occupied |
| 138 | * @tx_ring_next_slot: The next slot to fill in the TX ring |
| 139 | * @tx_ring_dma: The DMA mapped equivalent of tx_ring |
| 140 | * @tx_buffers: The sk_buff mappings for the TX ring |
| 141 | * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables |
| 142 | * @rx_ring: The pointer in ring_base of the RX ring |
| 143 | * @rx_ring_dma: The DMA mapped equivalent of rx_ring |
| 144 | * @rx_buffers: The sk_buff mappings for the RX ring |
| 145 | * @next_rx_desc_read: The next RX descriptor to read from on IRQ |
| 146 | * @msg_enable: The flags for which messages to emit |
| 147 | */ |
| 148 | struct ks8695_priv { |
| 149 | int in_suspend; |
| 150 | struct net_device *ndev; |
| 151 | struct device *dev; |
| 152 | enum ks8695_dtype dtype; |
| 153 | void __iomem *io_regs; |
| 154 | |
| 155 | const char *rx_irq_name, *tx_irq_name, *link_irq_name; |
| 156 | int rx_irq, tx_irq, link_irq; |
| 157 | |
| 158 | struct resource *regs_req, *phyiface_req; |
| 159 | void __iomem *phyiface_regs; |
| 160 | |
| 161 | void *ring_base; |
| 162 | dma_addr_t ring_base_dma; |
| 163 | |
| 164 | struct tx_ring_desc *tx_ring; |
| 165 | int tx_ring_used; |
| 166 | int tx_ring_next_slot; |
| 167 | dma_addr_t tx_ring_dma; |
| 168 | struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; |
| 169 | spinlock_t txq_lock; |
| 170 | |
| 171 | struct rx_ring_desc *rx_ring; |
| 172 | dma_addr_t rx_ring_dma; |
| 173 | struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; |
| 174 | int next_rx_desc_read; |
| 175 | |
| 176 | int msg_enable; |
| 177 | }; |
| 178 | |
| 179 | /* Register access */ |
| 180 | |
| 181 | /** |
| 182 | * ks8695_readreg - Read from a KS8695 ethernet register |
| 183 | * @ksp: The device to read from |
| 184 | * @reg: The register to read |
| 185 | */ |
| 186 | static inline u32 |
| 187 | ks8695_readreg(struct ks8695_priv *ksp, int reg) |
| 188 | { |
| 189 | return readl(ksp->io_regs + reg); |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * ks8695_writereg - Write to a KS8695 ethernet register |
| 194 | * @ksp: The device to write to |
| 195 | * @reg: The register to write |
| 196 | * @value: The value to write to the register |
| 197 | */ |
| 198 | static inline void |
| 199 | ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) |
| 200 | { |
| 201 | writel(value, ksp->io_regs + reg); |
| 202 | } |
| 203 | |
| 204 | /* Utility functions */ |
| 205 | |
| 206 | /** |
| 207 | * ks8695_port_type - Retrieve port-type as user-friendly string |
| 208 | * @ksp: The device to return the type for |
| 209 | * |
| 210 | * Returns a string indicating which of the WAN, LAN or HPNA |
| 211 | * ports this device is likely to represent. |
| 212 | */ |
| 213 | static const char * |
| 214 | ks8695_port_type(struct ks8695_priv *ksp) |
| 215 | { |
| 216 | switch (ksp->dtype) { |
| 217 | case KS8695_DTYPE_LAN: |
| 218 | return "LAN"; |
| 219 | case KS8695_DTYPE_WAN: |
| 220 | return "WAN"; |
| 221 | case KS8695_DTYPE_HPNA: |
| 222 | return "HPNA"; |
| 223 | } |
| 224 | |
| 225 | return "UNKNOWN"; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * ks8695_update_mac - Update the MAC registers in the device |
| 230 | * @ksp: The device to update |
| 231 | * |
| 232 | * Updates the MAC registers in the KS8695 device from the address in the |
| 233 | * net_device structure associated with this interface. |
| 234 | */ |
| 235 | static void |
| 236 | ks8695_update_mac(struct ks8695_priv *ksp) |
| 237 | { |
| 238 | /* Update the HW with the MAC from the net_device */ |
| 239 | struct net_device *ndev = ksp->ndev; |
| 240 | u32 machigh, maclow; |
| 241 | |
| 242 | maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | |
| 243 | (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); |
| 244 | machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); |
| 245 | |
| 246 | ks8695_writereg(ksp, KS8695_MAL, maclow); |
| 247 | ks8695_writereg(ksp, KS8695_MAH, machigh); |
| 248 | |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * ks8695_refill_rxbuffers - Re-fill the RX buffer ring |
| 253 | * @ksp: The device to refill |
| 254 | * |
| 255 | * Iterates the RX ring of the device looking for empty slots. |
| 256 | * For each empty slot, we allocate and map a new SKB and give it |
| 257 | * to the hardware. |
| 258 | * This can be called from interrupt context safely. |
| 259 | */ |
| 260 | static void |
| 261 | ks8695_refill_rxbuffers(struct ks8695_priv *ksp) |
| 262 | { |
| 263 | /* Run around the RX ring, filling in any missing sk_buff's */ |
| 264 | int buff_n; |
| 265 | |
| 266 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { |
| 267 | if (!ksp->rx_buffers[buff_n].skb) { |
| 268 | struct sk_buff *skb = dev_alloc_skb(MAX_RXBUF_SIZE); |
| 269 | dma_addr_t mapping; |
| 270 | |
| 271 | ksp->rx_buffers[buff_n].skb = skb; |
| 272 | if (skb == NULL) { |
| 273 | /* Failed to allocate one, perhaps |
| 274 | * we'll try again later. |
| 275 | */ |
| 276 | break; |
| 277 | } |
| 278 | |
| 279 | mapping = dma_map_single(ksp->dev, skb->data, |
| 280 | MAX_RXBUF_SIZE, |
| 281 | DMA_FROM_DEVICE); |
| 282 | if (unlikely(dma_mapping_error(ksp->dev, mapping))) { |
| 283 | /* Failed to DMA map this SKB, try later */ |
| 284 | dev_kfree_skb_irq(skb); |
| 285 | ksp->rx_buffers[buff_n].skb = NULL; |
| 286 | break; |
| 287 | } |
| 288 | ksp->rx_buffers[buff_n].dma_ptr = mapping; |
| 289 | skb->dev = ksp->ndev; |
| 290 | ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; |
| 291 | |
| 292 | /* Record this into the DMA ring */ |
| 293 | ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); |
| 294 | ksp->rx_ring[buff_n].length = |
| 295 | cpu_to_le32(MAX_RXBUF_SIZE); |
| 296 | |
| 297 | wmb(); |
| 298 | |
| 299 | /* And give ownership over to the hardware */ |
| 300 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | /* Maximum number of multicast addresses which the KS8695 HW supports */ |
| 306 | #define KS8695_NR_ADDRESSES 16 |
| 307 | |
| 308 | /** |
| 309 | * ks8695_init_partial_multicast - Init the mcast addr registers |
| 310 | * @ksp: The device to initialise |
| 311 | * @addr: The multicast address list to use |
| 312 | * @nr_addr: The number of addresses in the list |
| 313 | * |
| 314 | * This routine is a helper for ks8695_set_multicast - it writes |
| 315 | * the additional-address registers in the KS8695 ethernet device |
| 316 | * and cleans up any others left behind. |
| 317 | */ |
| 318 | static void |
| 319 | ks8695_init_partial_multicast(struct ks8695_priv *ksp, |
| 320 | struct dev_mc_list *addr, |
| 321 | int nr_addr) |
| 322 | { |
| 323 | u32 low, high; |
| 324 | int i; |
| 325 | |
| 326 | for (i = 0; i < nr_addr; i++, addr = addr->next) { |
| 327 | /* Ran out of addresses? */ |
| 328 | if (!addr) |
| 329 | break; |
| 330 | /* Ran out of space in chip? */ |
| 331 | BUG_ON(i == KS8695_NR_ADDRESSES); |
| 332 | |
| 333 | low = (addr->dmi_addr[2] << 24) | (addr->dmi_addr[3] << 16) | |
| 334 | (addr->dmi_addr[4] << 8) | (addr->dmi_addr[5]); |
| 335 | high = (addr->dmi_addr[0] << 8) | (addr->dmi_addr[1]); |
| 336 | |
| 337 | ks8695_writereg(ksp, KS8695_AAL_(i), low); |
| 338 | ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); |
| 339 | } |
| 340 | |
| 341 | /* Clear the remaining Additional Station Addresses */ |
| 342 | for (; i < KS8695_NR_ADDRESSES; i++) { |
| 343 | ks8695_writereg(ksp, KS8695_AAL_(i), 0); |
| 344 | ks8695_writereg(ksp, KS8695_AAH_(i), 0); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | /* Interrupt handling */ |
| 349 | |
| 350 | /** |
| 351 | * ks8695_tx_irq - Transmit IRQ handler |
| 352 | * @irq: The IRQ which went off (ignored) |
| 353 | * @dev_id: The net_device for the interrupt |
| 354 | * |
| 355 | * Process the TX ring, clearing out any transmitted slots. |
| 356 | * Allows the net_device to pass us new packets once slots are |
| 357 | * freed. |
| 358 | */ |
| 359 | static irqreturn_t |
| 360 | ks8695_tx_irq(int irq, void *dev_id) |
| 361 | { |
| 362 | struct net_device *ndev = (struct net_device *)dev_id; |
| 363 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 364 | int buff_n; |
| 365 | |
| 366 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { |
| 367 | if (ksp->tx_buffers[buff_n].skb && |
| 368 | !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) { |
| 369 | rmb(); |
| 370 | /* An SKB which is not owned by HW is present */ |
| 371 | /* Update the stats for the net_device */ |
| 372 | ndev->stats.tx_packets++; |
| 373 | ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length; |
| 374 | |
| 375 | /* Free the packet from the ring */ |
| 376 | ksp->tx_ring[buff_n].data_ptr = 0; |
| 377 | |
| 378 | /* Free the sk_buff */ |
| 379 | dma_unmap_single(ksp->dev, |
| 380 | ksp->tx_buffers[buff_n].dma_ptr, |
| 381 | ksp->tx_buffers[buff_n].length, |
| 382 | DMA_TO_DEVICE); |
| 383 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); |
| 384 | ksp->tx_buffers[buff_n].skb = NULL; |
| 385 | ksp->tx_ring_used--; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | netif_wake_queue(ndev); |
| 390 | |
| 391 | return IRQ_HANDLED; |
| 392 | } |
| 393 | |
| 394 | /** |
| 395 | * ks8695_rx_irq - Receive IRQ handler |
| 396 | * @irq: The IRQ which went off (ignored) |
| 397 | * @dev_id: The net_device for the interrupt |
| 398 | * |
| 399 | * Process the RX ring, passing any received packets up to the |
| 400 | * host. If we received anything other than errors, we then |
| 401 | * refill the ring. |
| 402 | */ |
| 403 | static irqreturn_t |
| 404 | ks8695_rx_irq(int irq, void *dev_id) |
| 405 | { |
| 406 | struct net_device *ndev = (struct net_device *)dev_id; |
| 407 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 408 | struct sk_buff *skb; |
| 409 | int buff_n; |
| 410 | u32 flags; |
| 411 | int pktlen; |
| 412 | int last_rx_processed = -1; |
| 413 | |
| 414 | buff_n = ksp->next_rx_desc_read; |
| 415 | do { |
| 416 | if (ksp->rx_buffers[buff_n].skb && |
| 417 | !(ksp->rx_ring[buff_n].status & cpu_to_le32(RDES_OWN))) { |
| 418 | rmb(); |
| 419 | flags = le32_to_cpu(ksp->rx_ring[buff_n].status); |
| 420 | /* Found an SKB which we own, this means we |
| 421 | * received a packet |
| 422 | */ |
| 423 | if ((flags & (RDES_FS | RDES_LS)) != |
| 424 | (RDES_FS | RDES_LS)) { |
| 425 | /* This packet is not the first and |
| 426 | * the last segment. Therefore it is |
| 427 | * a "spanning" packet and we can't |
| 428 | * handle it |
| 429 | */ |
| 430 | goto rx_failure; |
| 431 | } |
| 432 | |
| 433 | if (flags & (RDES_ES | RDES_RE)) { |
| 434 | /* It's an error packet */ |
| 435 | ndev->stats.rx_errors++; |
| 436 | if (flags & RDES_TL) |
| 437 | ndev->stats.rx_length_errors++; |
| 438 | if (flags & RDES_RF) |
| 439 | ndev->stats.rx_length_errors++; |
| 440 | if (flags & RDES_CE) |
| 441 | ndev->stats.rx_crc_errors++; |
| 442 | if (flags & RDES_RE) |
| 443 | ndev->stats.rx_missed_errors++; |
| 444 | |
| 445 | goto rx_failure; |
| 446 | } |
| 447 | |
| 448 | pktlen = flags & RDES_FLEN; |
| 449 | pktlen -= 4; /* Drop the CRC */ |
| 450 | |
| 451 | /* Retrieve the sk_buff */ |
| 452 | skb = ksp->rx_buffers[buff_n].skb; |
| 453 | |
| 454 | /* Clear it from the ring */ |
| 455 | ksp->rx_buffers[buff_n].skb = NULL; |
| 456 | ksp->rx_ring[buff_n].data_ptr = 0; |
| 457 | |
| 458 | /* Unmap the SKB */ |
| 459 | dma_unmap_single(ksp->dev, |
| 460 | ksp->rx_buffers[buff_n].dma_ptr, |
| 461 | ksp->rx_buffers[buff_n].length, |
| 462 | DMA_FROM_DEVICE); |
| 463 | |
| 464 | /* Relinquish the SKB to the network layer */ |
| 465 | skb_put(skb, pktlen); |
| 466 | skb->protocol = eth_type_trans(skb, ndev); |
| 467 | netif_rx(skb); |
| 468 | |
| 469 | /* Record stats */ |
| 470 | ndev->last_rx = jiffies; |
| 471 | ndev->stats.rx_packets++; |
| 472 | ndev->stats.rx_bytes += pktlen; |
| 473 | goto rx_finished; |
| 474 | |
| 475 | rx_failure: |
| 476 | /* This ring entry is an error, but we can |
| 477 | * re-use the skb |
| 478 | */ |
| 479 | /* Give the ring entry back to the hardware */ |
| 480 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); |
| 481 | rx_finished: |
| 482 | /* And note this as processed so we can start |
| 483 | * from here next time |
| 484 | */ |
| 485 | last_rx_processed = buff_n; |
| 486 | } else { |
| 487 | /* Ran out of things to process, stop now */ |
| 488 | break; |
| 489 | } |
| 490 | buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; |
| 491 | } while (buff_n != ksp->next_rx_desc_read); |
| 492 | |
| 493 | /* And note which RX descriptor we last did anything with */ |
| 494 | if (likely(last_rx_processed != -1)) |
| 495 | ksp->next_rx_desc_read = |
| 496 | (last_rx_processed + 1) & MAX_RX_DESC_MASK; |
| 497 | |
| 498 | /* And refill the buffers */ |
| 499 | ks8695_refill_rxbuffers(ksp); |
| 500 | |
| 501 | /* Kick the RX DMA engine, in case it became suspended */ |
| 502 | ks8695_writereg(ksp, KS8695_DRSC, 0); |
| 503 | |
| 504 | return IRQ_HANDLED; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * ks8695_link_irq - Link change IRQ handler |
| 509 | * @irq: The IRQ which went off (ignored) |
| 510 | * @dev_id: The net_device for the interrupt |
| 511 | * |
| 512 | * The WAN interface can generate an IRQ when the link changes, |
| 513 | * report this to the net layer and the user. |
| 514 | */ |
| 515 | static irqreturn_t |
| 516 | ks8695_link_irq(int irq, void *dev_id) |
| 517 | { |
| 518 | struct net_device *ndev = (struct net_device *)dev_id; |
| 519 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 520 | u32 ctrl; |
| 521 | |
| 522 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 523 | if (ctrl & WMC_WLS) { |
| 524 | netif_carrier_on(ndev); |
| 525 | if (netif_msg_link(ksp)) |
| 526 | dev_info(ksp->dev, |
| 527 | "%s: Link is now up (10%sMbps/%s-duplex)\n", |
| 528 | ndev->name, |
| 529 | (ctrl & WMC_WSS) ? "0" : "", |
| 530 | (ctrl & WMC_WDS) ? "Full" : "Half"); |
| 531 | } else { |
| 532 | netif_carrier_off(ndev); |
| 533 | if (netif_msg_link(ksp)) |
| 534 | dev_info(ksp->dev, "%s: Link is now down.\n", |
| 535 | ndev->name); |
| 536 | } |
| 537 | |
| 538 | return IRQ_HANDLED; |
| 539 | } |
| 540 | |
| 541 | |
| 542 | /* KS8695 Device functions */ |
| 543 | |
| 544 | /** |
| 545 | * ks8695_reset - Reset a KS8695 ethernet interface |
| 546 | * @ksp: The interface to reset |
| 547 | * |
| 548 | * Perform an engine reset of the interface and re-program it |
| 549 | * with sensible defaults. |
| 550 | */ |
| 551 | static void |
| 552 | ks8695_reset(struct ks8695_priv *ksp) |
| 553 | { |
| 554 | int reset_timeout = watchdog; |
| 555 | /* Issue the reset via the TX DMA control register */ |
| 556 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); |
| 557 | while (reset_timeout--) { |
| 558 | if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) |
| 559 | break; |
| 560 | msleep(1); |
| 561 | } |
| 562 | |
Roel Kluin | 858b9ce | 2009-03-04 00:11:42 -0800 | [diff] [blame] | 563 | if (reset_timeout < 0) { |
Daniel Silverstone | 7a3c66e | 2008-12-11 21:00:29 -0800 | [diff] [blame] | 564 | dev_crit(ksp->dev, |
| 565 | "Timeout waiting for DMA engines to reset\n"); |
| 566 | /* And blithely carry on */ |
| 567 | } |
| 568 | |
| 569 | /* Definitely wait long enough before attempting to program |
| 570 | * the engines |
| 571 | */ |
| 572 | msleep(10); |
| 573 | |
| 574 | /* RX: unicast and broadcast */ |
| 575 | ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); |
| 576 | /* TX: pad and add CRC */ |
| 577 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); |
| 578 | } |
| 579 | |
| 580 | /** |
| 581 | * ks8695_shutdown - Shut down a KS8695 ethernet interface |
| 582 | * @ksp: The interface to shut down |
| 583 | * |
| 584 | * This disables packet RX/TX, cleans up IRQs, drains the rings, |
| 585 | * and basically places the interface into a clean shutdown |
| 586 | * state. |
| 587 | */ |
| 588 | static void |
| 589 | ks8695_shutdown(struct ks8695_priv *ksp) |
| 590 | { |
| 591 | u32 ctrl; |
| 592 | int buff_n; |
| 593 | |
| 594 | /* Disable packet transmission */ |
| 595 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); |
| 596 | ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); |
| 597 | |
| 598 | /* Disable packet reception */ |
| 599 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); |
| 600 | ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); |
| 601 | |
| 602 | /* Release the IRQs */ |
| 603 | free_irq(ksp->rx_irq, ksp->ndev); |
| 604 | free_irq(ksp->tx_irq, ksp->ndev); |
| 605 | if (ksp->link_irq != -1) |
| 606 | free_irq(ksp->link_irq, ksp->ndev); |
| 607 | |
| 608 | /* Throw away any pending TX packets */ |
| 609 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { |
| 610 | if (ksp->tx_buffers[buff_n].skb) { |
| 611 | /* Remove this SKB from the TX ring */ |
| 612 | ksp->tx_ring[buff_n].owner = 0; |
| 613 | ksp->tx_ring[buff_n].status = 0; |
| 614 | ksp->tx_ring[buff_n].data_ptr = 0; |
| 615 | |
| 616 | /* Unmap and bin this SKB */ |
| 617 | dma_unmap_single(ksp->dev, |
| 618 | ksp->tx_buffers[buff_n].dma_ptr, |
| 619 | ksp->tx_buffers[buff_n].length, |
| 620 | DMA_TO_DEVICE); |
| 621 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); |
| 622 | ksp->tx_buffers[buff_n].skb = NULL; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /* Purge the RX buffers */ |
| 627 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { |
| 628 | if (ksp->rx_buffers[buff_n].skb) { |
| 629 | /* Remove the SKB from the RX ring */ |
| 630 | ksp->rx_ring[buff_n].status = 0; |
| 631 | ksp->rx_ring[buff_n].data_ptr = 0; |
| 632 | |
| 633 | /* Unmap and bin the SKB */ |
| 634 | dma_unmap_single(ksp->dev, |
| 635 | ksp->rx_buffers[buff_n].dma_ptr, |
| 636 | ksp->rx_buffers[buff_n].length, |
| 637 | DMA_FROM_DEVICE); |
| 638 | dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); |
| 639 | ksp->rx_buffers[buff_n].skb = NULL; |
| 640 | } |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | |
| 645 | /** |
| 646 | * ks8695_setup_irq - IRQ setup helper function |
| 647 | * @irq: The IRQ number to claim |
| 648 | * @irq_name: The name to give the IRQ claimant |
| 649 | * @handler: The function to call to handle the IRQ |
| 650 | * @ndev: The net_device to pass in as the dev_id argument to the handler |
| 651 | * |
| 652 | * Return 0 on success. |
| 653 | */ |
| 654 | static int |
| 655 | ks8695_setup_irq(int irq, const char *irq_name, |
| 656 | irq_handler_t handler, struct net_device *ndev) |
| 657 | { |
| 658 | int ret; |
| 659 | |
| 660 | ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); |
| 661 | |
| 662 | if (ret) { |
| 663 | dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); |
| 664 | return ret; |
| 665 | } |
| 666 | |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | /** |
| 671 | * ks8695_init_net - Initialise a KS8695 ethernet interface |
| 672 | * @ksp: The interface to initialise |
| 673 | * |
| 674 | * This routine fills the RX ring, initialises the DMA engines, |
| 675 | * allocates the IRQs and then starts the packet TX and RX |
| 676 | * engines. |
| 677 | */ |
| 678 | static int |
| 679 | ks8695_init_net(struct ks8695_priv *ksp) |
| 680 | { |
| 681 | int ret; |
| 682 | u32 ctrl; |
| 683 | |
| 684 | ks8695_refill_rxbuffers(ksp); |
| 685 | |
| 686 | /* Initialise the DMA engines */ |
| 687 | ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); |
| 688 | ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); |
| 689 | |
| 690 | /* Request the IRQs */ |
| 691 | ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, |
| 692 | ks8695_rx_irq, ksp->ndev); |
| 693 | if (ret) |
| 694 | return ret; |
| 695 | ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, |
| 696 | ks8695_tx_irq, ksp->ndev); |
| 697 | if (ret) |
| 698 | return ret; |
| 699 | if (ksp->link_irq != -1) { |
| 700 | ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, |
| 701 | ks8695_link_irq, ksp->ndev); |
| 702 | if (ret) |
| 703 | return ret; |
| 704 | } |
| 705 | |
| 706 | /* Set up the ring indices */ |
| 707 | ksp->next_rx_desc_read = 0; |
| 708 | ksp->tx_ring_next_slot = 0; |
| 709 | ksp->tx_ring_used = 0; |
| 710 | |
| 711 | /* Bring up transmission */ |
| 712 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); |
| 713 | /* Enable packet transmission */ |
| 714 | ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); |
| 715 | |
| 716 | /* Bring up the reception */ |
| 717 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); |
| 718 | /* Enable packet reception */ |
| 719 | ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); |
| 720 | /* And start the DMA engine */ |
| 721 | ks8695_writereg(ksp, KS8695_DRSC, 0); |
| 722 | |
| 723 | /* All done */ |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | /** |
| 728 | * ks8695_release_device - HW resource release for KS8695 e-net |
| 729 | * @ksp: The device to be freed |
| 730 | * |
| 731 | * This unallocates io memory regions, dma-coherent regions etc |
| 732 | * which were allocated in ks8695_probe. |
| 733 | */ |
| 734 | static void |
| 735 | ks8695_release_device(struct ks8695_priv *ksp) |
| 736 | { |
| 737 | /* Unmap the registers */ |
| 738 | iounmap(ksp->io_regs); |
| 739 | if (ksp->phyiface_regs) |
| 740 | iounmap(ksp->phyiface_regs); |
| 741 | |
| 742 | /* And release the request */ |
| 743 | release_resource(ksp->regs_req); |
| 744 | kfree(ksp->regs_req); |
| 745 | if (ksp->phyiface_req) { |
| 746 | release_resource(ksp->phyiface_req); |
| 747 | kfree(ksp->phyiface_req); |
| 748 | } |
| 749 | |
| 750 | /* Free the ring buffers */ |
| 751 | dma_free_coherent(ksp->dev, RING_DMA_SIZE, |
| 752 | ksp->ring_base, ksp->ring_base_dma); |
| 753 | } |
| 754 | |
| 755 | /* Ethtool support */ |
| 756 | |
| 757 | /** |
| 758 | * ks8695_get_msglevel - Get the messages enabled for emission |
| 759 | * @ndev: The network device to read from |
| 760 | */ |
| 761 | static u32 |
| 762 | ks8695_get_msglevel(struct net_device *ndev) |
| 763 | { |
| 764 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 765 | |
| 766 | return ksp->msg_enable; |
| 767 | } |
| 768 | |
| 769 | /** |
| 770 | * ks8695_set_msglevel - Set the messages enabled for emission |
| 771 | * @ndev: The network device to configure |
| 772 | * @value: The messages to set for emission |
| 773 | */ |
| 774 | static void |
| 775 | ks8695_set_msglevel(struct net_device *ndev, u32 value) |
| 776 | { |
| 777 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 778 | |
| 779 | ksp->msg_enable = value; |
| 780 | } |
| 781 | |
| 782 | /** |
| 783 | * ks8695_get_settings - Get device-specific settings. |
| 784 | * @ndev: The network device to read settings from |
| 785 | * @cmd: The ethtool structure to read into |
| 786 | */ |
| 787 | static int |
| 788 | ks8695_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) |
| 789 | { |
| 790 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 791 | u32 ctrl; |
| 792 | |
| 793 | /* All ports on the KS8695 support these... */ |
| 794 | cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | |
| 795 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | |
| 796 | SUPPORTED_TP | SUPPORTED_MII); |
| 797 | cmd->transceiver = XCVR_INTERNAL; |
| 798 | |
| 799 | /* Port specific extras */ |
| 800 | switch (ksp->dtype) { |
| 801 | case KS8695_DTYPE_HPNA: |
| 802 | cmd->phy_address = 0; |
| 803 | /* not supported for HPNA */ |
| 804 | cmd->autoneg = AUTONEG_DISABLE; |
| 805 | |
| 806 | /* BUG: Erm, dtype hpna implies no phy regs */ |
| 807 | /* |
| 808 | ctrl = readl(KS8695_MISC_VA + KS8695_HMC); |
| 809 | cmd->speed = (ctrl & HMC_HSS) ? SPEED_100 : SPEED_10; |
| 810 | cmd->duplex = (ctrl & HMC_HDS) ? DUPLEX_FULL : DUPLEX_HALF; |
| 811 | */ |
| 812 | return -EOPNOTSUPP; |
| 813 | case KS8695_DTYPE_WAN: |
| 814 | cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; |
| 815 | cmd->port = PORT_MII; |
| 816 | cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); |
| 817 | cmd->phy_address = 0; |
| 818 | |
| 819 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 820 | if ((ctrl & WMC_WAND) == 0) { |
| 821 | /* auto-negotiation is enabled */ |
| 822 | cmd->advertising |= ADVERTISED_Autoneg; |
| 823 | if (ctrl & WMC_WANA100F) |
| 824 | cmd->advertising |= ADVERTISED_100baseT_Full; |
| 825 | if (ctrl & WMC_WANA100H) |
| 826 | cmd->advertising |= ADVERTISED_100baseT_Half; |
| 827 | if (ctrl & WMC_WANA10F) |
| 828 | cmd->advertising |= ADVERTISED_10baseT_Full; |
| 829 | if (ctrl & WMC_WANA10H) |
| 830 | cmd->advertising |= ADVERTISED_10baseT_Half; |
| 831 | if (ctrl & WMC_WANAP) |
| 832 | cmd->advertising |= ADVERTISED_Pause; |
| 833 | cmd->autoneg = AUTONEG_ENABLE; |
| 834 | |
| 835 | cmd->speed = (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10; |
| 836 | cmd->duplex = (ctrl & WMC_WDS) ? |
| 837 | DUPLEX_FULL : DUPLEX_HALF; |
| 838 | } else { |
| 839 | /* auto-negotiation is disabled */ |
| 840 | cmd->autoneg = AUTONEG_DISABLE; |
| 841 | |
| 842 | cmd->speed = (ctrl & WMC_WANF100) ? |
| 843 | SPEED_100 : SPEED_10; |
| 844 | cmd->duplex = (ctrl & WMC_WANFF) ? |
| 845 | DUPLEX_FULL : DUPLEX_HALF; |
| 846 | } |
| 847 | break; |
| 848 | case KS8695_DTYPE_LAN: |
| 849 | return -EOPNOTSUPP; |
| 850 | } |
| 851 | |
| 852 | return 0; |
| 853 | } |
| 854 | |
| 855 | /** |
| 856 | * ks8695_set_settings - Set device-specific settings. |
| 857 | * @ndev: The network device to configure |
| 858 | * @cmd: The settings to configure |
| 859 | */ |
| 860 | static int |
| 861 | ks8695_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) |
| 862 | { |
| 863 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 864 | u32 ctrl; |
| 865 | |
| 866 | if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) |
| 867 | return -EINVAL; |
| 868 | if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) |
| 869 | return -EINVAL; |
| 870 | if (cmd->port != PORT_MII) |
| 871 | return -EINVAL; |
| 872 | if (cmd->transceiver != XCVR_INTERNAL) |
| 873 | return -EINVAL; |
| 874 | if ((cmd->autoneg != AUTONEG_DISABLE) && |
| 875 | (cmd->autoneg != AUTONEG_ENABLE)) |
| 876 | return -EINVAL; |
| 877 | |
| 878 | if (cmd->autoneg == AUTONEG_ENABLE) { |
| 879 | if ((cmd->advertising & (ADVERTISED_10baseT_Half | |
| 880 | ADVERTISED_10baseT_Full | |
| 881 | ADVERTISED_100baseT_Half | |
| 882 | ADVERTISED_100baseT_Full)) == 0) |
| 883 | return -EINVAL; |
| 884 | |
| 885 | switch (ksp->dtype) { |
| 886 | case KS8695_DTYPE_HPNA: |
| 887 | /* HPNA does not support auto-negotiation. */ |
| 888 | return -EINVAL; |
| 889 | case KS8695_DTYPE_WAN: |
| 890 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 891 | |
| 892 | ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | |
| 893 | WMC_WANA10F | WMC_WANA10H); |
| 894 | if (cmd->advertising & ADVERTISED_100baseT_Full) |
| 895 | ctrl |= WMC_WANA100F; |
| 896 | if (cmd->advertising & ADVERTISED_100baseT_Half) |
| 897 | ctrl |= WMC_WANA100H; |
| 898 | if (cmd->advertising & ADVERTISED_10baseT_Full) |
| 899 | ctrl |= WMC_WANA10F; |
| 900 | if (cmd->advertising & ADVERTISED_10baseT_Half) |
| 901 | ctrl |= WMC_WANA10H; |
| 902 | |
| 903 | /* force a re-negotiation */ |
| 904 | ctrl |= WMC_WANR; |
| 905 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); |
| 906 | break; |
| 907 | case KS8695_DTYPE_LAN: |
| 908 | return -EOPNOTSUPP; |
| 909 | } |
| 910 | |
| 911 | } else { |
| 912 | switch (ksp->dtype) { |
| 913 | case KS8695_DTYPE_HPNA: |
| 914 | /* BUG: dtype_hpna implies no phy registers */ |
| 915 | /* |
| 916 | ctrl = __raw_readl(KS8695_MISC_VA + KS8695_HMC); |
| 917 | |
| 918 | ctrl &= ~(HMC_HSS | HMC_HDS); |
| 919 | if (cmd->speed == SPEED_100) |
| 920 | ctrl |= HMC_HSS; |
| 921 | if (cmd->duplex == DUPLEX_FULL) |
| 922 | ctrl |= HMC_HDS; |
| 923 | |
| 924 | __raw_writel(ctrl, KS8695_MISC_VA + KS8695_HMC); |
| 925 | */ |
| 926 | return -EOPNOTSUPP; |
| 927 | case KS8695_DTYPE_WAN: |
| 928 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 929 | |
| 930 | /* disable auto-negotiation */ |
| 931 | ctrl |= WMC_WAND; |
| 932 | ctrl &= ~(WMC_WANF100 | WMC_WANFF); |
| 933 | |
| 934 | if (cmd->speed == SPEED_100) |
| 935 | ctrl |= WMC_WANF100; |
| 936 | if (cmd->duplex == DUPLEX_FULL) |
| 937 | ctrl |= WMC_WANFF; |
| 938 | |
| 939 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); |
| 940 | break; |
| 941 | case KS8695_DTYPE_LAN: |
| 942 | return -EOPNOTSUPP; |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | return 0; |
| 947 | } |
| 948 | |
| 949 | /** |
| 950 | * ks8695_nwayreset - Restart the autonegotiation on the port. |
| 951 | * @ndev: The network device to restart autoneotiation on |
| 952 | */ |
| 953 | static int |
| 954 | ks8695_nwayreset(struct net_device *ndev) |
| 955 | { |
| 956 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 957 | u32 ctrl; |
| 958 | |
| 959 | switch (ksp->dtype) { |
| 960 | case KS8695_DTYPE_HPNA: |
| 961 | /* No phy means no autonegotiation on hpna */ |
| 962 | return -EINVAL; |
| 963 | case KS8695_DTYPE_WAN: |
| 964 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 965 | |
| 966 | if ((ctrl & WMC_WAND) == 0) |
| 967 | writel(ctrl | WMC_WANR, |
| 968 | ksp->phyiface_regs + KS8695_WMC); |
| 969 | else |
| 970 | /* auto-negotiation not enabled */ |
| 971 | return -EINVAL; |
| 972 | break; |
| 973 | case KS8695_DTYPE_LAN: |
| 974 | return -EOPNOTSUPP; |
| 975 | } |
| 976 | |
| 977 | return 0; |
| 978 | } |
| 979 | |
| 980 | /** |
| 981 | * ks8695_get_link - Retrieve link status of network interface |
| 982 | * @ndev: The network interface to retrive the link status of. |
| 983 | */ |
| 984 | static u32 |
| 985 | ks8695_get_link(struct net_device *ndev) |
| 986 | { |
| 987 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 988 | u32 ctrl; |
| 989 | |
| 990 | switch (ksp->dtype) { |
| 991 | case KS8695_DTYPE_HPNA: |
| 992 | /* HPNA always has link */ |
| 993 | return 1; |
| 994 | case KS8695_DTYPE_WAN: |
| 995 | /* WAN we can read the PHY for */ |
| 996 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 997 | return ctrl & WMC_WLS; |
| 998 | case KS8695_DTYPE_LAN: |
| 999 | return -EOPNOTSUPP; |
| 1000 | } |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | /** |
| 1005 | * ks8695_get_pause - Retrieve network pause/flow-control advertising |
| 1006 | * @ndev: The device to retrieve settings from |
| 1007 | * @param: The structure to fill out with the information |
| 1008 | */ |
| 1009 | static void |
| 1010 | ks8695_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) |
| 1011 | { |
| 1012 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1013 | u32 ctrl; |
| 1014 | |
| 1015 | switch (ksp->dtype) { |
| 1016 | case KS8695_DTYPE_HPNA: |
| 1017 | /* No phy link on hpna to configure */ |
| 1018 | return; |
| 1019 | case KS8695_DTYPE_WAN: |
| 1020 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
| 1021 | |
| 1022 | /* advertise Pause */ |
| 1023 | param->autoneg = (ctrl & WMC_WANAP); |
| 1024 | |
| 1025 | /* current Rx Flow-control */ |
| 1026 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); |
| 1027 | param->rx_pause = (ctrl & DRXC_RFCE); |
| 1028 | |
| 1029 | /* current Tx Flow-control */ |
| 1030 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); |
| 1031 | param->tx_pause = (ctrl & DTXC_TFCE); |
| 1032 | break; |
| 1033 | case KS8695_DTYPE_LAN: |
| 1034 | /* The LAN's "phy" is a direct-attached switch */ |
| 1035 | return; |
| 1036 | } |
| 1037 | } |
| 1038 | |
| 1039 | /** |
| 1040 | * ks8695_set_pause - Configure pause/flow-control |
| 1041 | * @ndev: The device to configure |
| 1042 | * @param: The pause parameters to set |
| 1043 | * |
| 1044 | * TODO: Implement this |
| 1045 | */ |
| 1046 | static int |
| 1047 | ks8695_set_pause(struct net_device *ndev, struct ethtool_pauseparam *param) |
| 1048 | { |
| 1049 | return -EOPNOTSUPP; |
| 1050 | } |
| 1051 | |
| 1052 | /** |
| 1053 | * ks8695_get_drvinfo - Retrieve driver information |
| 1054 | * @ndev: The network device to retrieve info about |
| 1055 | * @info: The info structure to fill out. |
| 1056 | */ |
| 1057 | static void |
| 1058 | ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) |
| 1059 | { |
| 1060 | strlcpy(info->driver, MODULENAME, sizeof(info->driver)); |
| 1061 | strlcpy(info->version, MODULEVERSION, sizeof(info->version)); |
Kay Sievers | c231355 | 2009-03-24 16:38:22 -0700 | [diff] [blame^] | 1062 | strlcpy(info->bus_info, dev_name(ndev->dev.parent), |
Daniel Silverstone | 7a3c66e | 2008-12-11 21:00:29 -0800 | [diff] [blame] | 1063 | sizeof(info->bus_info)); |
| 1064 | } |
| 1065 | |
| 1066 | static struct ethtool_ops ks8695_ethtool_ops = { |
| 1067 | .get_msglevel = ks8695_get_msglevel, |
| 1068 | .set_msglevel = ks8695_set_msglevel, |
| 1069 | .get_settings = ks8695_get_settings, |
| 1070 | .set_settings = ks8695_set_settings, |
| 1071 | .nway_reset = ks8695_nwayreset, |
| 1072 | .get_link = ks8695_get_link, |
| 1073 | .get_pauseparam = ks8695_get_pause, |
| 1074 | .set_pauseparam = ks8695_set_pause, |
| 1075 | .get_drvinfo = ks8695_get_drvinfo, |
| 1076 | }; |
| 1077 | |
| 1078 | /* Network device interface functions */ |
| 1079 | |
| 1080 | /** |
| 1081 | * ks8695_set_mac - Update MAC in net dev and HW |
| 1082 | * @ndev: The network device to update |
| 1083 | * @addr: The new MAC address to set |
| 1084 | */ |
| 1085 | static int |
| 1086 | ks8695_set_mac(struct net_device *ndev, void *addr) |
| 1087 | { |
| 1088 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1089 | struct sockaddr *address = addr; |
| 1090 | |
| 1091 | if (!is_valid_ether_addr(address->sa_data)) |
| 1092 | return -EADDRNOTAVAIL; |
| 1093 | |
| 1094 | memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); |
| 1095 | |
| 1096 | ks8695_update_mac(ksp); |
| 1097 | |
| 1098 | dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", |
| 1099 | ndev->name, ndev->dev_addr); |
| 1100 | |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | /** |
| 1105 | * ks8695_set_multicast - Set up the multicast behaviour of the interface |
| 1106 | * @ndev: The net_device to configure |
| 1107 | * |
| 1108 | * This routine, called by the net layer, configures promiscuity |
| 1109 | * and multicast reception behaviour for the interface. |
| 1110 | */ |
| 1111 | static void |
| 1112 | ks8695_set_multicast(struct net_device *ndev) |
| 1113 | { |
| 1114 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1115 | u32 ctrl; |
| 1116 | |
| 1117 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); |
| 1118 | |
| 1119 | if (ndev->flags & IFF_PROMISC) { |
| 1120 | /* enable promiscuous mode */ |
| 1121 | ctrl |= DRXC_RA; |
| 1122 | } else if (ndev->flags & ~IFF_PROMISC) { |
| 1123 | /* disable promiscuous mode */ |
| 1124 | ctrl &= ~DRXC_RA; |
| 1125 | } |
| 1126 | |
| 1127 | if (ndev->flags & IFF_ALLMULTI) { |
| 1128 | /* enable all multicast mode */ |
| 1129 | ctrl |= DRXC_RM; |
| 1130 | } else if (ndev->mc_count > KS8695_NR_ADDRESSES) { |
| 1131 | /* more specific multicast addresses than can be |
| 1132 | * handled in hardware |
| 1133 | */ |
| 1134 | ctrl |= DRXC_RM; |
| 1135 | } else { |
| 1136 | /* enable specific multicasts */ |
| 1137 | ctrl &= ~DRXC_RM; |
| 1138 | ks8695_init_partial_multicast(ksp, ndev->mc_list, |
| 1139 | ndev->mc_count); |
| 1140 | } |
| 1141 | |
| 1142 | ks8695_writereg(ksp, KS8695_DRXC, ctrl); |
| 1143 | } |
| 1144 | |
| 1145 | /** |
| 1146 | * ks8695_timeout - Handle a network tx/rx timeout. |
| 1147 | * @ndev: The net_device which timed out. |
| 1148 | * |
| 1149 | * A network transaction timed out, reset the device. |
| 1150 | */ |
| 1151 | static void |
| 1152 | ks8695_timeout(struct net_device *ndev) |
| 1153 | { |
| 1154 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1155 | |
| 1156 | netif_stop_queue(ndev); |
| 1157 | ks8695_shutdown(ksp); |
| 1158 | |
| 1159 | ks8695_reset(ksp); |
| 1160 | |
| 1161 | ks8695_update_mac(ksp); |
| 1162 | |
| 1163 | /* We ignore the return from this since it managed to init |
| 1164 | * before it probably will be okay to init again. |
| 1165 | */ |
| 1166 | ks8695_init_net(ksp); |
| 1167 | |
| 1168 | /* Reconfigure promiscuity etc */ |
| 1169 | ks8695_set_multicast(ndev); |
| 1170 | |
| 1171 | /* And start the TX queue once more */ |
| 1172 | netif_start_queue(ndev); |
| 1173 | } |
| 1174 | |
| 1175 | /** |
| 1176 | * ks8695_start_xmit - Start a packet transmission |
| 1177 | * @skb: The packet to transmit |
| 1178 | * @ndev: The network device to send the packet on |
| 1179 | * |
| 1180 | * This routine, called by the net layer, takes ownership of the |
| 1181 | * sk_buff and adds it to the TX ring. It then kicks the TX DMA |
| 1182 | * engine to ensure transmission begins. |
| 1183 | */ |
| 1184 | static int |
| 1185 | ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 1186 | { |
| 1187 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1188 | int buff_n; |
| 1189 | dma_addr_t dmap; |
| 1190 | |
| 1191 | spin_lock_irq(&ksp->txq_lock); |
| 1192 | |
| 1193 | if (ksp->tx_ring_used == MAX_TX_DESC) { |
| 1194 | /* Somehow we got entered when we have no room */ |
| 1195 | spin_unlock_irq(&ksp->txq_lock); |
| 1196 | return NETDEV_TX_BUSY; |
| 1197 | } |
| 1198 | |
| 1199 | buff_n = ksp->tx_ring_next_slot; |
| 1200 | |
| 1201 | BUG_ON(ksp->tx_buffers[buff_n].skb); |
| 1202 | |
| 1203 | dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); |
| 1204 | if (unlikely(dma_mapping_error(ksp->dev, dmap))) { |
| 1205 | /* Failed to DMA map this SKB, give it back for now */ |
| 1206 | spin_unlock_irq(&ksp->txq_lock); |
| 1207 | dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ |
| 1208 | "transmission, trying later\n", ndev->name); |
| 1209 | return NETDEV_TX_BUSY; |
| 1210 | } |
| 1211 | |
| 1212 | ksp->tx_buffers[buff_n].dma_ptr = dmap; |
| 1213 | /* Mapped okay, store the buffer pointer and length for later */ |
| 1214 | ksp->tx_buffers[buff_n].skb = skb; |
| 1215 | ksp->tx_buffers[buff_n].length = skb->len; |
| 1216 | |
| 1217 | /* Fill out the TX descriptor */ |
| 1218 | ksp->tx_ring[buff_n].data_ptr = |
| 1219 | cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); |
| 1220 | ksp->tx_ring[buff_n].status = |
| 1221 | cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | |
| 1222 | (skb->len & TDES_TBS)); |
| 1223 | |
| 1224 | wmb(); |
| 1225 | |
| 1226 | /* Hand it over to the hardware */ |
| 1227 | ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); |
| 1228 | |
| 1229 | if (++ksp->tx_ring_used == MAX_TX_DESC) |
| 1230 | netif_stop_queue(ndev); |
| 1231 | |
| 1232 | ndev->trans_start = jiffies; |
| 1233 | |
| 1234 | /* Kick the TX DMA in case it decided to go IDLE */ |
| 1235 | ks8695_writereg(ksp, KS8695_DTSC, 0); |
| 1236 | |
| 1237 | /* And update the next ring slot */ |
| 1238 | ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; |
| 1239 | |
| 1240 | spin_unlock_irq(&ksp->txq_lock); |
| 1241 | return NETDEV_TX_OK; |
| 1242 | } |
| 1243 | |
| 1244 | /** |
| 1245 | * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface |
| 1246 | * @ndev: The net_device to stop |
| 1247 | * |
| 1248 | * This disables the TX queue and cleans up a KS8695 ethernet |
| 1249 | * device. |
| 1250 | */ |
| 1251 | static int |
| 1252 | ks8695_stop(struct net_device *ndev) |
| 1253 | { |
| 1254 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1255 | |
| 1256 | netif_stop_queue(ndev); |
| 1257 | netif_carrier_off(ndev); |
| 1258 | |
| 1259 | ks8695_shutdown(ksp); |
| 1260 | |
| 1261 | return 0; |
| 1262 | } |
| 1263 | |
| 1264 | /** |
| 1265 | * ks8695_open - Open (bring up) a KS8695 ethernet interface |
| 1266 | * @ndev: The net_device to open |
| 1267 | * |
| 1268 | * This resets, configures the MAC, initialises the RX ring and |
| 1269 | * DMA engines and starts the TX queue for a KS8695 ethernet |
| 1270 | * device. |
| 1271 | */ |
| 1272 | static int |
| 1273 | ks8695_open(struct net_device *ndev) |
| 1274 | { |
| 1275 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1276 | int ret; |
| 1277 | |
| 1278 | if (!is_valid_ether_addr(ndev->dev_addr)) |
| 1279 | return -EADDRNOTAVAIL; |
| 1280 | |
| 1281 | ks8695_reset(ksp); |
| 1282 | |
| 1283 | ks8695_update_mac(ksp); |
| 1284 | |
| 1285 | ret = ks8695_init_net(ksp); |
| 1286 | if (ret) { |
| 1287 | ks8695_shutdown(ksp); |
| 1288 | return ret; |
| 1289 | } |
| 1290 | |
| 1291 | netif_start_queue(ndev); |
| 1292 | |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
| 1296 | /* Platform device driver */ |
| 1297 | |
| 1298 | /** |
| 1299 | * ks8695_init_switch - Init LAN switch to known good defaults. |
| 1300 | * @ksp: The device to initialise |
| 1301 | * |
| 1302 | * This initialises the LAN switch in the KS8695 to a known-good |
| 1303 | * set of defaults. |
| 1304 | */ |
| 1305 | static void __devinit |
| 1306 | ks8695_init_switch(struct ks8695_priv *ksp) |
| 1307 | { |
| 1308 | u32 ctrl; |
| 1309 | |
| 1310 | /* Default value for SEC0 according to datasheet */ |
| 1311 | ctrl = 0x40819e00; |
| 1312 | |
| 1313 | /* LED0 = Speed LED1 = Link/Activity */ |
| 1314 | ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); |
| 1315 | ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); |
| 1316 | |
| 1317 | /* Enable Switch */ |
| 1318 | ctrl |= SEC0_ENABLE; |
| 1319 | |
| 1320 | writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); |
| 1321 | |
| 1322 | /* Defaults for SEC1 */ |
| 1323 | writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); |
| 1324 | } |
| 1325 | |
| 1326 | /** |
| 1327 | * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults |
| 1328 | * @ksp: The device to initialise |
| 1329 | * |
| 1330 | * This initialises a KS8695's WAN phy to sensible values for |
| 1331 | * autonegotiation etc. |
| 1332 | */ |
| 1333 | static void __devinit |
| 1334 | ks8695_init_wan_phy(struct ks8695_priv *ksp) |
| 1335 | { |
| 1336 | u32 ctrl; |
| 1337 | |
| 1338 | /* Support auto-negotiation */ |
| 1339 | ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | |
| 1340 | WMC_WANA10F | WMC_WANA10H); |
| 1341 | |
| 1342 | /* LED0 = Activity , LED1 = Link */ |
| 1343 | ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); |
| 1344 | |
| 1345 | /* Restart Auto-negotiation */ |
| 1346 | ctrl |= WMC_WANR; |
| 1347 | |
| 1348 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); |
| 1349 | |
| 1350 | writel(0, ksp->phyiface_regs + KS8695_WPPM); |
| 1351 | writel(0, ksp->phyiface_regs + KS8695_PPS); |
| 1352 | } |
| 1353 | |
| 1354 | static const struct net_device_ops ks8695_netdev_ops = { |
| 1355 | .ndo_open = ks8695_open, |
| 1356 | .ndo_stop = ks8695_stop, |
| 1357 | .ndo_start_xmit = ks8695_start_xmit, |
| 1358 | .ndo_tx_timeout = ks8695_timeout, |
| 1359 | .ndo_set_mac_address = ks8695_set_mac, |
Stephen Hemminger | 52255bb | 2009-01-09 10:45:37 +0000 | [diff] [blame] | 1360 | .ndo_validate_addr = eth_validate_addr, |
Daniel Silverstone | 7a3c66e | 2008-12-11 21:00:29 -0800 | [diff] [blame] | 1361 | .ndo_set_multicast_list = ks8695_set_multicast, |
| 1362 | }; |
| 1363 | |
| 1364 | /** |
| 1365 | * ks8695_probe - Probe and initialise a KS8695 ethernet interface |
| 1366 | * @pdev: The platform device to probe |
| 1367 | * |
| 1368 | * Initialise a KS8695 ethernet device from platform data. |
| 1369 | * |
| 1370 | * This driver requires at least one IORESOURCE_MEM for the |
| 1371 | * registers and two IORESOURCE_IRQ for the RX and TX IRQs |
| 1372 | * respectively. It can optionally take an additional |
| 1373 | * IORESOURCE_MEM for the switch or phy in the case of the lan or |
| 1374 | * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan |
| 1375 | * port. |
| 1376 | */ |
| 1377 | static int __devinit |
| 1378 | ks8695_probe(struct platform_device *pdev) |
| 1379 | { |
| 1380 | struct ks8695_priv *ksp; |
| 1381 | struct net_device *ndev; |
| 1382 | struct resource *regs_res, *phyiface_res; |
| 1383 | struct resource *rxirq_res, *txirq_res, *linkirq_res; |
| 1384 | int ret = 0; |
| 1385 | int buff_n; |
| 1386 | u32 machigh, maclow; |
| 1387 | |
| 1388 | /* Initialise a net_device */ |
| 1389 | ndev = alloc_etherdev(sizeof(struct ks8695_priv)); |
| 1390 | if (!ndev) { |
| 1391 | dev_err(&pdev->dev, "could not allocate device.\n"); |
| 1392 | return -ENOMEM; |
| 1393 | } |
| 1394 | |
| 1395 | SET_NETDEV_DEV(ndev, &pdev->dev); |
| 1396 | |
| 1397 | dev_dbg(&pdev->dev, "ks8695_probe() called\n"); |
| 1398 | |
| 1399 | /* Configure our private structure a little */ |
| 1400 | ksp = netdev_priv(ndev); |
| 1401 | memset(ksp, 0, sizeof(struct ks8695_priv)); |
| 1402 | |
| 1403 | ksp->dev = &pdev->dev; |
| 1404 | ksp->ndev = ndev; |
| 1405 | ksp->msg_enable = NETIF_MSG_LINK; |
| 1406 | |
| 1407 | /* Retrieve resources */ |
| 1408 | regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1409 | phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| 1410 | |
| 1411 | rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 1412 | txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); |
| 1413 | linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); |
| 1414 | |
| 1415 | if (!(regs_res && rxirq_res && txirq_res)) { |
| 1416 | dev_err(ksp->dev, "insufficient resources\n"); |
| 1417 | ret = -ENOENT; |
| 1418 | goto failure; |
| 1419 | } |
| 1420 | |
| 1421 | ksp->regs_req = request_mem_region(regs_res->start, |
| 1422 | resource_size(regs_res), |
| 1423 | pdev->name); |
| 1424 | |
| 1425 | if (!ksp->regs_req) { |
| 1426 | dev_err(ksp->dev, "cannot claim register space\n"); |
| 1427 | ret = -EIO; |
| 1428 | goto failure; |
| 1429 | } |
| 1430 | |
| 1431 | ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); |
| 1432 | |
| 1433 | if (!ksp->io_regs) { |
| 1434 | dev_err(ksp->dev, "failed to ioremap registers\n"); |
| 1435 | ret = -EINVAL; |
| 1436 | goto failure; |
| 1437 | } |
| 1438 | |
| 1439 | if (phyiface_res) { |
| 1440 | ksp->phyiface_req = |
| 1441 | request_mem_region(phyiface_res->start, |
| 1442 | resource_size(phyiface_res), |
| 1443 | phyiface_res->name); |
| 1444 | |
| 1445 | if (!ksp->phyiface_req) { |
| 1446 | dev_err(ksp->dev, |
| 1447 | "cannot claim switch register space\n"); |
| 1448 | ret = -EIO; |
| 1449 | goto failure; |
| 1450 | } |
| 1451 | |
| 1452 | ksp->phyiface_regs = ioremap(phyiface_res->start, |
| 1453 | resource_size(phyiface_res)); |
| 1454 | |
| 1455 | if (!ksp->phyiface_regs) { |
| 1456 | dev_err(ksp->dev, |
| 1457 | "failed to ioremap switch registers\n"); |
| 1458 | ret = -EINVAL; |
| 1459 | goto failure; |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | ksp->rx_irq = rxirq_res->start; |
| 1464 | ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; |
| 1465 | ksp->tx_irq = txirq_res->start; |
| 1466 | ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; |
| 1467 | ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); |
| 1468 | ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? |
| 1469 | linkirq_res->name : "Ethernet Link"; |
| 1470 | |
| 1471 | /* driver system setup */ |
| 1472 | ndev->netdev_ops = &ks8695_netdev_ops; |
| 1473 | SET_ETHTOOL_OPS(ndev, &ks8695_ethtool_ops); |
| 1474 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); |
| 1475 | |
| 1476 | /* Retrieve the default MAC addr from the chip. */ |
| 1477 | /* The bootloader should have left it in there for us. */ |
| 1478 | |
| 1479 | machigh = ks8695_readreg(ksp, KS8695_MAH); |
| 1480 | maclow = ks8695_readreg(ksp, KS8695_MAL); |
| 1481 | |
| 1482 | ndev->dev_addr[0] = (machigh >> 8) & 0xFF; |
| 1483 | ndev->dev_addr[1] = machigh & 0xFF; |
| 1484 | ndev->dev_addr[2] = (maclow >> 24) & 0xFF; |
| 1485 | ndev->dev_addr[3] = (maclow >> 16) & 0xFF; |
| 1486 | ndev->dev_addr[4] = (maclow >> 8) & 0xFF; |
| 1487 | ndev->dev_addr[5] = maclow & 0xFF; |
| 1488 | |
| 1489 | if (!is_valid_ether_addr(ndev->dev_addr)) |
| 1490 | dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " |
| 1491 | "set using ifconfig\n", ndev->name); |
| 1492 | |
| 1493 | /* In order to be efficient memory-wise, we allocate both |
| 1494 | * rings in one go. |
| 1495 | */ |
| 1496 | ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, |
| 1497 | &ksp->ring_base_dma, GFP_KERNEL); |
| 1498 | if (!ksp->ring_base) { |
| 1499 | ret = -ENOMEM; |
| 1500 | goto failure; |
| 1501 | } |
| 1502 | |
| 1503 | /* Specify the TX DMA ring buffer */ |
| 1504 | ksp->tx_ring = ksp->ring_base; |
| 1505 | ksp->tx_ring_dma = ksp->ring_base_dma; |
| 1506 | |
| 1507 | /* And initialise the queue's lock */ |
| 1508 | spin_lock_init(&ksp->txq_lock); |
| 1509 | |
| 1510 | /* Specify the RX DMA ring buffer */ |
| 1511 | ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; |
| 1512 | ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; |
| 1513 | |
| 1514 | /* Zero the descriptor rings */ |
| 1515 | memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); |
| 1516 | memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); |
| 1517 | |
| 1518 | /* Build the rings */ |
| 1519 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { |
| 1520 | ksp->tx_ring[buff_n].next_desc = |
| 1521 | cpu_to_le32(ksp->tx_ring_dma + |
| 1522 | (sizeof(struct tx_ring_desc) * |
| 1523 | ((buff_n + 1) & MAX_TX_DESC_MASK))); |
| 1524 | } |
| 1525 | |
| 1526 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { |
| 1527 | ksp->rx_ring[buff_n].next_desc = |
| 1528 | cpu_to_le32(ksp->rx_ring_dma + |
| 1529 | (sizeof(struct rx_ring_desc) * |
| 1530 | ((buff_n + 1) & MAX_RX_DESC_MASK))); |
| 1531 | } |
| 1532 | |
| 1533 | /* Initialise the port (physically) */ |
| 1534 | if (ksp->phyiface_regs && ksp->link_irq == -1) { |
| 1535 | ks8695_init_switch(ksp); |
| 1536 | ksp->dtype = KS8695_DTYPE_LAN; |
| 1537 | } else if (ksp->phyiface_regs && ksp->link_irq != -1) { |
| 1538 | ks8695_init_wan_phy(ksp); |
| 1539 | ksp->dtype = KS8695_DTYPE_WAN; |
| 1540 | } else { |
| 1541 | /* No initialisation since HPNA does not have a PHY */ |
| 1542 | ksp->dtype = KS8695_DTYPE_HPNA; |
| 1543 | } |
| 1544 | |
| 1545 | /* And bring up the net_device with the net core */ |
| 1546 | platform_set_drvdata(pdev, ndev); |
| 1547 | ret = register_netdev(ndev); |
| 1548 | |
| 1549 | if (ret == 0) { |
| 1550 | dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", |
| 1551 | ks8695_port_type(ksp), ndev->dev_addr); |
| 1552 | } else { |
| 1553 | /* Report the failure to register the net_device */ |
| 1554 | dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); |
| 1555 | goto failure; |
| 1556 | } |
| 1557 | |
| 1558 | /* All is well */ |
| 1559 | return 0; |
| 1560 | |
| 1561 | /* Error exit path */ |
| 1562 | failure: |
| 1563 | ks8695_release_device(ksp); |
| 1564 | free_netdev(ndev); |
| 1565 | |
| 1566 | return ret; |
| 1567 | } |
| 1568 | |
| 1569 | /** |
| 1570 | * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. |
| 1571 | * @pdev: The device to suspend |
| 1572 | * @state: The suspend state |
| 1573 | * |
| 1574 | * This routine detaches and shuts down a KS8695 ethernet device. |
| 1575 | */ |
| 1576 | static int |
| 1577 | ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) |
| 1578 | { |
| 1579 | struct net_device *ndev = platform_get_drvdata(pdev); |
| 1580 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1581 | |
| 1582 | ksp->in_suspend = 1; |
| 1583 | |
| 1584 | if (netif_running(ndev)) { |
| 1585 | netif_device_detach(ndev); |
| 1586 | ks8695_shutdown(ksp); |
| 1587 | } |
| 1588 | |
| 1589 | return 0; |
| 1590 | } |
| 1591 | |
| 1592 | /** |
| 1593 | * ks8695_drv_resume - Resume a KS8695 ethernet platform device. |
| 1594 | * @pdev: The device to resume |
| 1595 | * |
| 1596 | * This routine re-initialises and re-attaches a KS8695 ethernet |
| 1597 | * device. |
| 1598 | */ |
| 1599 | static int |
| 1600 | ks8695_drv_resume(struct platform_device *pdev) |
| 1601 | { |
| 1602 | struct net_device *ndev = platform_get_drvdata(pdev); |
| 1603 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1604 | |
| 1605 | if (netif_running(ndev)) { |
| 1606 | ks8695_reset(ksp); |
| 1607 | ks8695_init_net(ksp); |
| 1608 | ks8695_set_multicast(ndev); |
| 1609 | netif_device_attach(ndev); |
| 1610 | } |
| 1611 | |
| 1612 | ksp->in_suspend = 0; |
| 1613 | |
| 1614 | return 0; |
| 1615 | } |
| 1616 | |
| 1617 | /** |
| 1618 | * ks8695_drv_remove - Remove a KS8695 net device on driver unload. |
| 1619 | * @pdev: The platform device to remove |
| 1620 | * |
| 1621 | * This unregisters and releases a KS8695 ethernet device. |
| 1622 | */ |
| 1623 | static int __devexit |
| 1624 | ks8695_drv_remove(struct platform_device *pdev) |
| 1625 | { |
| 1626 | struct net_device *ndev = platform_get_drvdata(pdev); |
| 1627 | struct ks8695_priv *ksp = netdev_priv(ndev); |
| 1628 | |
| 1629 | platform_set_drvdata(pdev, NULL); |
| 1630 | |
| 1631 | unregister_netdev(ndev); |
| 1632 | ks8695_release_device(ksp); |
| 1633 | free_netdev(ndev); |
| 1634 | |
| 1635 | dev_dbg(&pdev->dev, "released and freed device\n"); |
| 1636 | return 0; |
| 1637 | } |
| 1638 | |
| 1639 | static struct platform_driver ks8695_driver = { |
| 1640 | .driver = { |
| 1641 | .name = MODULENAME, |
| 1642 | .owner = THIS_MODULE, |
| 1643 | }, |
| 1644 | .probe = ks8695_probe, |
| 1645 | .remove = __devexit_p(ks8695_drv_remove), |
| 1646 | .suspend = ks8695_drv_suspend, |
| 1647 | .resume = ks8695_drv_resume, |
| 1648 | }; |
| 1649 | |
| 1650 | /* Module interface */ |
| 1651 | |
| 1652 | static int __init |
| 1653 | ks8695_init(void) |
| 1654 | { |
| 1655 | printk(KERN_INFO "%s Ethernet driver, V%s\n", |
| 1656 | MODULENAME, MODULEVERSION); |
| 1657 | |
| 1658 | return platform_driver_register(&ks8695_driver); |
| 1659 | } |
| 1660 | |
| 1661 | static void __exit |
| 1662 | ks8695_cleanup(void) |
| 1663 | { |
| 1664 | platform_driver_unregister(&ks8695_driver); |
| 1665 | } |
| 1666 | |
| 1667 | module_init(ks8695_init); |
| 1668 | module_exit(ks8695_cleanup); |
| 1669 | |
| 1670 | MODULE_AUTHOR("Simtec Electronics") |
| 1671 | MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); |
| 1672 | MODULE_LICENSE("GPL"); |
| 1673 | MODULE_ALIAS("platform:" MODULENAME); |
| 1674 | |
| 1675 | module_param(watchdog, int, 0400); |
| 1676 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); |