Commit | Line | Data |
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7a3c66e2 DS |
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 | ||
b7f080cf | 19 | #include <linux/dma-mapping.h> |
7a3c66e2 DS |
20 | #include <linux/module.h> |
21 | #include <linux/ioport.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/init.h> | |
a6b7a407 | 25 | #include <linux/interrupt.h> |
7a3c66e2 DS |
26 | #include <linux/skbuff.h> |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/crc32.h> | |
29 | #include <linux/mii.h> | |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/platform_device.h> | |
33 | #include <linux/irq.h> | |
7a3c66e2 | 34 | #include <linux/io.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
7a3c66e2 DS |
36 | |
37 | #include <asm/irq.h> | |
38 | ||
39 | #include <mach/regs-switch.h> | |
40 | #include <mach/regs-misc.h> | |
31b73ab3 F |
41 | #include <asm/mach/irq.h> |
42 | #include <mach/regs-irq.h> | |
7a3c66e2 DS |
43 | |
44 | #include "ks8695net.h" | |
45 | ||
46 | #define MODULENAME "ks8695_ether" | |
68d8287c | 47 | #define MODULEVERSION "1.02" |
31b73ab3 | 48 | |
7a3c66e2 DS |
49 | /* |
50 | * Transmit and device reset timeout, default 5 seconds. | |
51 | */ | |
52 | static int watchdog = 5000; | |
53 | ||
54 | /* Hardware structures */ | |
55 | ||
56 | /** | |
57 | * struct rx_ring_desc - Receive descriptor ring element | |
58 | * @status: The status of the descriptor element (E.g. who owns it) | |
59 | * @length: The number of bytes in the block pointed to by data_ptr | |
60 | * @data_ptr: The physical address of the data block to receive into | |
61 | * @next_desc: The physical address of the next descriptor element. | |
62 | */ | |
63 | struct rx_ring_desc { | |
64 | __le32 status; | |
65 | __le32 length; | |
66 | __le32 data_ptr; | |
67 | __le32 next_desc; | |
68 | }; | |
69 | ||
70 | /** | |
71 | * struct tx_ring_desc - Transmit descriptor ring element | |
72 | * @owner: Who owns the descriptor | |
73 | * @status: The number of bytes in the block pointed to by data_ptr | |
74 | * @data_ptr: The physical address of the data block to receive into | |
75 | * @next_desc: The physical address of the next descriptor element. | |
76 | */ | |
77 | struct tx_ring_desc { | |
78 | __le32 owner; | |
79 | __le32 status; | |
80 | __le32 data_ptr; | |
81 | __le32 next_desc; | |
82 | }; | |
83 | ||
84 | /** | |
85 | * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. | |
86 | * @skb: The buffer in the ring | |
87 | * @dma_ptr: The mapped DMA pointer of the buffer | |
88 | * @length: The number of bytes mapped to dma_ptr | |
89 | */ | |
90 | struct ks8695_skbuff { | |
91 | struct sk_buff *skb; | |
92 | dma_addr_t dma_ptr; | |
93 | u32 length; | |
94 | }; | |
95 | ||
96 | /* Private device structure */ | |
97 | ||
98 | #define MAX_TX_DESC 8 | |
99 | #define MAX_TX_DESC_MASK 0x7 | |
100 | #define MAX_RX_DESC 16 | |
101 | #define MAX_RX_DESC_MASK 0xf | |
102 | ||
68d8287c F |
103 | /*napi_weight have better more than rx DMA buffers*/ |
104 | #define NAPI_WEIGHT 64 | |
105 | ||
7a3c66e2 DS |
106 | #define MAX_RXBUF_SIZE 0x700 |
107 | ||
108 | #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) | |
109 | #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) | |
110 | #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) | |
111 | ||
112 | /** | |
113 | * enum ks8695_dtype - Device type | |
114 | * @KS8695_DTYPE_WAN: This device is a WAN interface | |
115 | * @KS8695_DTYPE_LAN: This device is a LAN interface | |
116 | * @KS8695_DTYPE_HPNA: This device is an HPNA interface | |
117 | */ | |
118 | enum ks8695_dtype { | |
119 | KS8695_DTYPE_WAN, | |
120 | KS8695_DTYPE_LAN, | |
121 | KS8695_DTYPE_HPNA, | |
122 | }; | |
123 | ||
124 | /** | |
125 | * struct ks8695_priv - Private data for the KS8695 Ethernet | |
126 | * @in_suspend: Flag to indicate if we're suspending/resuming | |
127 | * @ndev: The net_device for this interface | |
128 | * @dev: The platform device object for this interface | |
129 | * @dtype: The type of this device | |
130 | * @io_regs: The ioremapped registers for this interface | |
68d8287c | 131 | * @napi : Add support NAPI for Rx |
7a3c66e2 DS |
132 | * @rx_irq_name: The textual name of the RX IRQ from the platform data |
133 | * @tx_irq_name: The textual name of the TX IRQ from the platform data | |
134 | * @link_irq_name: The textual name of the link IRQ from the | |
135 | * platform data if available | |
136 | * @rx_irq: The IRQ number for the RX IRQ | |
137 | * @tx_irq: The IRQ number for the TX IRQ | |
138 | * @link_irq: The IRQ number for the link IRQ if available | |
139 | * @regs_req: The resource request for the registers region | |
140 | * @phyiface_req: The resource request for the phy/switch region | |
141 | * if available | |
142 | * @phyiface_regs: The ioremapped registers for the phy/switch if available | |
143 | * @ring_base: The base pointer of the dma coherent memory for the rings | |
144 | * @ring_base_dma: The DMA mapped equivalent of ring_base | |
145 | * @tx_ring: The pointer in ring_base of the TX ring | |
146 | * @tx_ring_used: The number of slots in the TX ring which are occupied | |
147 | * @tx_ring_next_slot: The next slot to fill in the TX ring | |
148 | * @tx_ring_dma: The DMA mapped equivalent of tx_ring | |
149 | * @tx_buffers: The sk_buff mappings for the TX ring | |
150 | * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables | |
151 | * @rx_ring: The pointer in ring_base of the RX ring | |
152 | * @rx_ring_dma: The DMA mapped equivalent of rx_ring | |
153 | * @rx_buffers: The sk_buff mappings for the RX ring | |
154 | * @next_rx_desc_read: The next RX descriptor to read from on IRQ | |
68d8287c | 155 | * @rx_lock: A lock to protect Rx irq function |
7a3c66e2 DS |
156 | * @msg_enable: The flags for which messages to emit |
157 | */ | |
158 | struct ks8695_priv { | |
159 | int in_suspend; | |
160 | struct net_device *ndev; | |
161 | struct device *dev; | |
162 | enum ks8695_dtype dtype; | |
163 | void __iomem *io_regs; | |
164 | ||
31b73ab3 F |
165 | struct napi_struct napi; |
166 | ||
7a3c66e2 DS |
167 | const char *rx_irq_name, *tx_irq_name, *link_irq_name; |
168 | int rx_irq, tx_irq, link_irq; | |
169 | ||
170 | struct resource *regs_req, *phyiface_req; | |
171 | void __iomem *phyiface_regs; | |
172 | ||
173 | void *ring_base; | |
174 | dma_addr_t ring_base_dma; | |
175 | ||
176 | struct tx_ring_desc *tx_ring; | |
177 | int tx_ring_used; | |
178 | int tx_ring_next_slot; | |
179 | dma_addr_t tx_ring_dma; | |
180 | struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; | |
181 | spinlock_t txq_lock; | |
182 | ||
183 | struct rx_ring_desc *rx_ring; | |
184 | dma_addr_t rx_ring_dma; | |
185 | struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; | |
186 | int next_rx_desc_read; | |
31b73ab3 | 187 | spinlock_t rx_lock; |
7a3c66e2 DS |
188 | |
189 | int msg_enable; | |
190 | }; | |
191 | ||
192 | /* Register access */ | |
193 | ||
194 | /** | |
195 | * ks8695_readreg - Read from a KS8695 ethernet register | |
196 | * @ksp: The device to read from | |
197 | * @reg: The register to read | |
198 | */ | |
199 | static inline u32 | |
200 | ks8695_readreg(struct ks8695_priv *ksp, int reg) | |
201 | { | |
202 | return readl(ksp->io_regs + reg); | |
203 | } | |
204 | ||
205 | /** | |
206 | * ks8695_writereg - Write to a KS8695 ethernet register | |
207 | * @ksp: The device to write to | |
208 | * @reg: The register to write | |
209 | * @value: The value to write to the register | |
210 | */ | |
211 | static inline void | |
212 | ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) | |
213 | { | |
214 | writel(value, ksp->io_regs + reg); | |
215 | } | |
216 | ||
217 | /* Utility functions */ | |
218 | ||
219 | /** | |
220 | * ks8695_port_type - Retrieve port-type as user-friendly string | |
221 | * @ksp: The device to return the type for | |
222 | * | |
223 | * Returns a string indicating which of the WAN, LAN or HPNA | |
224 | * ports this device is likely to represent. | |
225 | */ | |
226 | static const char * | |
227 | ks8695_port_type(struct ks8695_priv *ksp) | |
228 | { | |
229 | switch (ksp->dtype) { | |
230 | case KS8695_DTYPE_LAN: | |
231 | return "LAN"; | |
232 | case KS8695_DTYPE_WAN: | |
233 | return "WAN"; | |
234 | case KS8695_DTYPE_HPNA: | |
235 | return "HPNA"; | |
236 | } | |
237 | ||
238 | return "UNKNOWN"; | |
239 | } | |
240 | ||
241 | /** | |
242 | * ks8695_update_mac - Update the MAC registers in the device | |
243 | * @ksp: The device to update | |
244 | * | |
245 | * Updates the MAC registers in the KS8695 device from the address in the | |
246 | * net_device structure associated with this interface. | |
247 | */ | |
248 | static void | |
249 | ks8695_update_mac(struct ks8695_priv *ksp) | |
250 | { | |
251 | /* Update the HW with the MAC from the net_device */ | |
252 | struct net_device *ndev = ksp->ndev; | |
253 | u32 machigh, maclow; | |
254 | ||
255 | maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | | |
256 | (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); | |
257 | machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); | |
258 | ||
259 | ks8695_writereg(ksp, KS8695_MAL, maclow); | |
260 | ks8695_writereg(ksp, KS8695_MAH, machigh); | |
261 | ||
262 | } | |
263 | ||
264 | /** | |
265 | * ks8695_refill_rxbuffers - Re-fill the RX buffer ring | |
266 | * @ksp: The device to refill | |
267 | * | |
268 | * Iterates the RX ring of the device looking for empty slots. | |
269 | * For each empty slot, we allocate and map a new SKB and give it | |
270 | * to the hardware. | |
271 | * This can be called from interrupt context safely. | |
272 | */ | |
273 | static void | |
274 | ks8695_refill_rxbuffers(struct ks8695_priv *ksp) | |
275 | { | |
276 | /* Run around the RX ring, filling in any missing sk_buff's */ | |
277 | int buff_n; | |
278 | ||
279 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
280 | if (!ksp->rx_buffers[buff_n].skb) { | |
c056b734 PD |
281 | struct sk_buff *skb = |
282 | netdev_alloc_skb(ksp->ndev, MAX_RXBUF_SIZE); | |
7a3c66e2 DS |
283 | dma_addr_t mapping; |
284 | ||
285 | ksp->rx_buffers[buff_n].skb = skb; | |
286 | if (skb == NULL) { | |
287 | /* Failed to allocate one, perhaps | |
288 | * we'll try again later. | |
289 | */ | |
290 | break; | |
291 | } | |
292 | ||
293 | mapping = dma_map_single(ksp->dev, skb->data, | |
294 | MAX_RXBUF_SIZE, | |
295 | DMA_FROM_DEVICE); | |
296 | if (unlikely(dma_mapping_error(ksp->dev, mapping))) { | |
297 | /* Failed to DMA map this SKB, try later */ | |
298 | dev_kfree_skb_irq(skb); | |
299 | ksp->rx_buffers[buff_n].skb = NULL; | |
300 | break; | |
301 | } | |
302 | ksp->rx_buffers[buff_n].dma_ptr = mapping; | |
7a3c66e2 DS |
303 | ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; |
304 | ||
305 | /* Record this into the DMA ring */ | |
306 | ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); | |
307 | ksp->rx_ring[buff_n].length = | |
308 | cpu_to_le32(MAX_RXBUF_SIZE); | |
309 | ||
310 | wmb(); | |
311 | ||
312 | /* And give ownership over to the hardware */ | |
313 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
314 | } | |
315 | } | |
316 | } | |
317 | ||
318 | /* Maximum number of multicast addresses which the KS8695 HW supports */ | |
319 | #define KS8695_NR_ADDRESSES 16 | |
320 | ||
321 | /** | |
322 | * ks8695_init_partial_multicast - Init the mcast addr registers | |
323 | * @ksp: The device to initialise | |
324 | * @addr: The multicast address list to use | |
325 | * @nr_addr: The number of addresses in the list | |
326 | * | |
327 | * This routine is a helper for ks8695_set_multicast - it writes | |
328 | * the additional-address registers in the KS8695 ethernet device | |
329 | * and cleans up any others left behind. | |
330 | */ | |
331 | static void | |
332 | ks8695_init_partial_multicast(struct ks8695_priv *ksp, | |
3b9a7728 | 333 | struct net_device *ndev) |
7a3c66e2 DS |
334 | { |
335 | u32 low, high; | |
336 | int i; | |
22bedad3 | 337 | struct netdev_hw_addr *ha; |
7a3c66e2 | 338 | |
3b9a7728 | 339 | i = 0; |
22bedad3 | 340 | netdev_for_each_mc_addr(ha, ndev) { |
7a3c66e2 DS |
341 | /* Ran out of space in chip? */ |
342 | BUG_ON(i == KS8695_NR_ADDRESSES); | |
343 | ||
22bedad3 JP |
344 | low = (ha->addr[2] << 24) | (ha->addr[3] << 16) | |
345 | (ha->addr[4] << 8) | (ha->addr[5]); | |
346 | high = (ha->addr[0] << 8) | (ha->addr[1]); | |
7a3c66e2 DS |
347 | |
348 | ks8695_writereg(ksp, KS8695_AAL_(i), low); | |
349 | ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); | |
3b9a7728 | 350 | i++; |
7a3c66e2 DS |
351 | } |
352 | ||
353 | /* Clear the remaining Additional Station Addresses */ | |
354 | for (; i < KS8695_NR_ADDRESSES; i++) { | |
355 | ks8695_writereg(ksp, KS8695_AAL_(i), 0); | |
356 | ks8695_writereg(ksp, KS8695_AAH_(i), 0); | |
357 | } | |
358 | } | |
359 | ||
360 | /* Interrupt handling */ | |
361 | ||
362 | /** | |
363 | * ks8695_tx_irq - Transmit IRQ handler | |
364 | * @irq: The IRQ which went off (ignored) | |
365 | * @dev_id: The net_device for the interrupt | |
366 | * | |
367 | * Process the TX ring, clearing out any transmitted slots. | |
368 | * Allows the net_device to pass us new packets once slots are | |
369 | * freed. | |
370 | */ | |
371 | static irqreturn_t | |
372 | ks8695_tx_irq(int irq, void *dev_id) | |
373 | { | |
374 | struct net_device *ndev = (struct net_device *)dev_id; | |
375 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
376 | int buff_n; | |
377 | ||
378 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
379 | if (ksp->tx_buffers[buff_n].skb && | |
380 | !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) { | |
381 | rmb(); | |
382 | /* An SKB which is not owned by HW is present */ | |
383 | /* Update the stats for the net_device */ | |
384 | ndev->stats.tx_packets++; | |
385 | ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length; | |
386 | ||
387 | /* Free the packet from the ring */ | |
388 | ksp->tx_ring[buff_n].data_ptr = 0; | |
389 | ||
390 | /* Free the sk_buff */ | |
391 | dma_unmap_single(ksp->dev, | |
392 | ksp->tx_buffers[buff_n].dma_ptr, | |
393 | ksp->tx_buffers[buff_n].length, | |
394 | DMA_TO_DEVICE); | |
395 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
396 | ksp->tx_buffers[buff_n].skb = NULL; | |
397 | ksp->tx_ring_used--; | |
398 | } | |
399 | } | |
400 | ||
401 | netif_wake_queue(ndev); | |
402 | ||
403 | return IRQ_HANDLED; | |
404 | } | |
405 | ||
68d8287c F |
406 | /** |
407 | * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit | |
408 | * @ksp: Private data for the KS8695 Ethernet | |
409 | * | |
410 | * For KS8695 document: | |
411 | * Interrupt Enable Register (offset 0xE204) | |
412 | * Bit29 : WAN MAC Receive Interrupt Enable | |
413 | * Bit16 : LAN MAC Receive Interrupt Enable | |
414 | * Interrupt Status Register (Offset 0xF208) | |
415 | * Bit29: WAN MAC Receive Status | |
416 | * Bit16: LAN MAC Receive Status | |
fb914ebf | 417 | * So, this Rx interrupt enable/status bit number is equal |
68d8287c F |
418 | * as Rx IRQ number. |
419 | */ | |
420 | static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp) | |
421 | { | |
422 | return ksp->rx_irq; | |
423 | } | |
424 | ||
7a3c66e2 DS |
425 | /** |
426 | * ks8695_rx_irq - Receive IRQ handler | |
427 | * @irq: The IRQ which went off (ignored) | |
428 | * @dev_id: The net_device for the interrupt | |
429 | * | |
68d8287c | 430 | * Inform NAPI that packet reception needs to be scheduled |
7a3c66e2 | 431 | */ |
31b73ab3 | 432 | |
7a3c66e2 DS |
433 | static irqreturn_t |
434 | ks8695_rx_irq(int irq, void *dev_id) | |
435 | { | |
436 | struct net_device *ndev = (struct net_device *)dev_id; | |
31b73ab3 | 437 | struct ks8695_priv *ksp = netdev_priv(ndev); |
31b73ab3 F |
438 | |
439 | spin_lock(&ksp->rx_lock); | |
440 | ||
fa6cae14 | 441 | if (napi_schedule_prep(&ksp->napi)) { |
442 | unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN); | |
443 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
444 | /*disable rx interrupt*/ | |
445 | status &= ~mask_bit; | |
446 | writel(status , KS8695_IRQ_VA + KS8695_INTEN); | |
447 | __napi_schedule(&ksp->napi); | |
31b73ab3 F |
448 | } |
449 | ||
450 | spin_unlock(&ksp->rx_lock); | |
451 | return IRQ_HANDLED; | |
452 | } | |
453 | ||
68d8287c | 454 | /** |
ea93fd94 | 455 | * ks8695_rx - Receive packets called by NAPI poll method |
68d8287c | 456 | * @ksp: Private data for the KS8695 Ethernet |
ea93fd94 | 457 | * @budget: Number of packets allowed to process |
68d8287c | 458 | */ |
68d8287c | 459 | static int ks8695_rx(struct ks8695_priv *ksp, int budget) |
31b73ab3 | 460 | { |
68d8287c | 461 | struct net_device *ndev = ksp->ndev; |
7a3c66e2 DS |
462 | struct sk_buff *skb; |
463 | int buff_n; | |
464 | u32 flags; | |
465 | int pktlen; | |
31b73ab3 | 466 | int received = 0; |
7a3c66e2 DS |
467 | |
468 | buff_n = ksp->next_rx_desc_read; | |
31b73ab3 F |
469 | while (received < budget |
470 | && ksp->rx_buffers[buff_n].skb | |
471 | && (!(ksp->rx_ring[buff_n].status & | |
472 | cpu_to_le32(RDES_OWN)))) { | |
7a3c66e2 DS |
473 | rmb(); |
474 | flags = le32_to_cpu(ksp->rx_ring[buff_n].status); | |
ea93fd94 | 475 | |
7a3c66e2 DS |
476 | /* Found an SKB which we own, this means we |
477 | * received a packet | |
478 | */ | |
479 | if ((flags & (RDES_FS | RDES_LS)) != | |
480 | (RDES_FS | RDES_LS)) { | |
481 | /* This packet is not the first and | |
482 | * the last segment. Therefore it is | |
483 | * a "spanning" packet and we can't | |
484 | * handle it | |
485 | */ | |
486 | goto rx_failure; | |
487 | } | |
488 | ||
489 | if (flags & (RDES_ES | RDES_RE)) { | |
490 | /* It's an error packet */ | |
491 | ndev->stats.rx_errors++; | |
492 | if (flags & RDES_TL) | |
493 | ndev->stats.rx_length_errors++; | |
494 | if (flags & RDES_RF) | |
495 | ndev->stats.rx_length_errors++; | |
496 | if (flags & RDES_CE) | |
497 | ndev->stats.rx_crc_errors++; | |
498 | if (flags & RDES_RE) | |
499 | ndev->stats.rx_missed_errors++; | |
500 | ||
501 | goto rx_failure; | |
502 | } | |
503 | ||
504 | pktlen = flags & RDES_FLEN; | |
505 | pktlen -= 4; /* Drop the CRC */ | |
506 | ||
507 | /* Retrieve the sk_buff */ | |
508 | skb = ksp->rx_buffers[buff_n].skb; | |
509 | ||
510 | /* Clear it from the ring */ | |
511 | ksp->rx_buffers[buff_n].skb = NULL; | |
512 | ksp->rx_ring[buff_n].data_ptr = 0; | |
513 | ||
514 | /* Unmap the SKB */ | |
515 | dma_unmap_single(ksp->dev, | |
516 | ksp->rx_buffers[buff_n].dma_ptr, | |
517 | ksp->rx_buffers[buff_n].length, | |
518 | DMA_FROM_DEVICE); | |
519 | ||
520 | /* Relinquish the SKB to the network layer */ | |
521 | skb_put(skb, pktlen); | |
522 | skb->protocol = eth_type_trans(skb, ndev); | |
31b73ab3 | 523 | netif_receive_skb(skb); |
7a3c66e2 DS |
524 | |
525 | /* Record stats */ | |
7a3c66e2 DS |
526 | ndev->stats.rx_packets++; |
527 | ndev->stats.rx_bytes += pktlen; | |
528 | goto rx_finished; | |
529 | ||
530 | rx_failure: | |
531 | /* This ring entry is an error, but we can | |
532 | * re-use the skb | |
533 | */ | |
534 | /* Give the ring entry back to the hardware */ | |
535 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
536 | rx_finished: | |
31b73ab3 | 537 | received++; |
31b73ab3 | 538 | buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; |
31b73ab3 | 539 | } |
ea93fd94 YY |
540 | |
541 | /* And note which RX descriptor we last did */ | |
542 | ksp->next_rx_desc_read = buff_n; | |
543 | ||
5c427ff9 | 544 | /* And refill the buffers */ |
545 | ks8695_refill_rxbuffers(ksp); | |
546 | ||
ea93fd94 | 547 | /* Kick the RX DMA engine, in case it became suspended */ |
5c427ff9 | 548 | ks8695_writereg(ksp, KS8695_DRSC, 0); |
ea93fd94 | 549 | |
31b73ab3 F |
550 | return received; |
551 | } | |
7a3c66e2 | 552 | |
68d8287c F |
553 | |
554 | /** | |
555 | * ks8695_poll - Receive packet by NAPI poll method | |
556 | * @ksp: Private data for the KS8695 Ethernet | |
557 | * @budget: The remaining number packets for network subsystem | |
558 | * | |
559 | * Invoked by the network core when it requests for new | |
560 | * packets from the driver | |
561 | */ | |
31b73ab3 F |
562 | static int ks8695_poll(struct napi_struct *napi, int budget) |
563 | { | |
564 | struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi); | |
68d8287c | 565 | unsigned long work_done; |
31b73ab3 | 566 | |
68d8287c F |
567 | unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN); |
568 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
31b73ab3 | 569 | |
68d8287c | 570 | work_done = ks8695_rx(ksp, budget); |
31b73ab3 F |
571 | |
572 | if (work_done < budget) { | |
573 | unsigned long flags; | |
574 | spin_lock_irqsave(&ksp->rx_lock, flags); | |
b96b894c | 575 | __napi_complete(napi); |
31b73ab3 F |
576 | /*enable rx interrupt*/ |
577 | writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN); | |
31b73ab3 F |
578 | spin_unlock_irqrestore(&ksp->rx_lock, flags); |
579 | } | |
580 | return work_done; | |
7a3c66e2 DS |
581 | } |
582 | ||
583 | /** | |
584 | * ks8695_link_irq - Link change IRQ handler | |
585 | * @irq: The IRQ which went off (ignored) | |
586 | * @dev_id: The net_device for the interrupt | |
587 | * | |
588 | * The WAN interface can generate an IRQ when the link changes, | |
589 | * report this to the net layer and the user. | |
590 | */ | |
591 | static irqreturn_t | |
592 | ks8695_link_irq(int irq, void *dev_id) | |
593 | { | |
594 | struct net_device *ndev = (struct net_device *)dev_id; | |
595 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
596 | u32 ctrl; | |
597 | ||
598 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
599 | if (ctrl & WMC_WLS) { | |
600 | netif_carrier_on(ndev); | |
601 | if (netif_msg_link(ksp)) | |
602 | dev_info(ksp->dev, | |
603 | "%s: Link is now up (10%sMbps/%s-duplex)\n", | |
604 | ndev->name, | |
605 | (ctrl & WMC_WSS) ? "0" : "", | |
606 | (ctrl & WMC_WDS) ? "Full" : "Half"); | |
607 | } else { | |
608 | netif_carrier_off(ndev); | |
609 | if (netif_msg_link(ksp)) | |
610 | dev_info(ksp->dev, "%s: Link is now down.\n", | |
611 | ndev->name); | |
612 | } | |
613 | ||
614 | return IRQ_HANDLED; | |
615 | } | |
616 | ||
617 | ||
618 | /* KS8695 Device functions */ | |
619 | ||
620 | /** | |
621 | * ks8695_reset - Reset a KS8695 ethernet interface | |
622 | * @ksp: The interface to reset | |
623 | * | |
624 | * Perform an engine reset of the interface and re-program it | |
625 | * with sensible defaults. | |
626 | */ | |
627 | static void | |
628 | ks8695_reset(struct ks8695_priv *ksp) | |
629 | { | |
630 | int reset_timeout = watchdog; | |
631 | /* Issue the reset via the TX DMA control register */ | |
632 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); | |
633 | while (reset_timeout--) { | |
634 | if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) | |
635 | break; | |
636 | msleep(1); | |
637 | } | |
638 | ||
858b9ced | 639 | if (reset_timeout < 0) { |
7a3c66e2 DS |
640 | dev_crit(ksp->dev, |
641 | "Timeout waiting for DMA engines to reset\n"); | |
642 | /* And blithely carry on */ | |
643 | } | |
644 | ||
645 | /* Definitely wait long enough before attempting to program | |
646 | * the engines | |
647 | */ | |
648 | msleep(10); | |
649 | ||
650 | /* RX: unicast and broadcast */ | |
651 | ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); | |
652 | /* TX: pad and add CRC */ | |
653 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); | |
654 | } | |
655 | ||
656 | /** | |
657 | * ks8695_shutdown - Shut down a KS8695 ethernet interface | |
658 | * @ksp: The interface to shut down | |
659 | * | |
660 | * This disables packet RX/TX, cleans up IRQs, drains the rings, | |
661 | * and basically places the interface into a clean shutdown | |
662 | * state. | |
663 | */ | |
664 | static void | |
665 | ks8695_shutdown(struct ks8695_priv *ksp) | |
666 | { | |
667 | u32 ctrl; | |
668 | int buff_n; | |
669 | ||
670 | /* Disable packet transmission */ | |
671 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
672 | ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); | |
673 | ||
674 | /* Disable packet reception */ | |
675 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
676 | ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); | |
677 | ||
678 | /* Release the IRQs */ | |
679 | free_irq(ksp->rx_irq, ksp->ndev); | |
680 | free_irq(ksp->tx_irq, ksp->ndev); | |
681 | if (ksp->link_irq != -1) | |
682 | free_irq(ksp->link_irq, ksp->ndev); | |
683 | ||
684 | /* Throw away any pending TX packets */ | |
685 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
686 | if (ksp->tx_buffers[buff_n].skb) { | |
687 | /* Remove this SKB from the TX ring */ | |
688 | ksp->tx_ring[buff_n].owner = 0; | |
689 | ksp->tx_ring[buff_n].status = 0; | |
690 | ksp->tx_ring[buff_n].data_ptr = 0; | |
691 | ||
692 | /* Unmap and bin this SKB */ | |
693 | dma_unmap_single(ksp->dev, | |
694 | ksp->tx_buffers[buff_n].dma_ptr, | |
695 | ksp->tx_buffers[buff_n].length, | |
696 | DMA_TO_DEVICE); | |
697 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
698 | ksp->tx_buffers[buff_n].skb = NULL; | |
699 | } | |
700 | } | |
701 | ||
702 | /* Purge the RX buffers */ | |
703 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
704 | if (ksp->rx_buffers[buff_n].skb) { | |
705 | /* Remove the SKB from the RX ring */ | |
706 | ksp->rx_ring[buff_n].status = 0; | |
707 | ksp->rx_ring[buff_n].data_ptr = 0; | |
708 | ||
709 | /* Unmap and bin the SKB */ | |
710 | dma_unmap_single(ksp->dev, | |
711 | ksp->rx_buffers[buff_n].dma_ptr, | |
712 | ksp->rx_buffers[buff_n].length, | |
713 | DMA_FROM_DEVICE); | |
714 | dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); | |
715 | ksp->rx_buffers[buff_n].skb = NULL; | |
716 | } | |
717 | } | |
718 | } | |
719 | ||
720 | ||
721 | /** | |
722 | * ks8695_setup_irq - IRQ setup helper function | |
723 | * @irq: The IRQ number to claim | |
724 | * @irq_name: The name to give the IRQ claimant | |
725 | * @handler: The function to call to handle the IRQ | |
726 | * @ndev: The net_device to pass in as the dev_id argument to the handler | |
727 | * | |
728 | * Return 0 on success. | |
729 | */ | |
730 | static int | |
731 | ks8695_setup_irq(int irq, const char *irq_name, | |
732 | irq_handler_t handler, struct net_device *ndev) | |
733 | { | |
734 | int ret; | |
735 | ||
736 | ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); | |
737 | ||
738 | if (ret) { | |
739 | dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); | |
740 | return ret; | |
741 | } | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | /** | |
747 | * ks8695_init_net - Initialise a KS8695 ethernet interface | |
748 | * @ksp: The interface to initialise | |
749 | * | |
750 | * This routine fills the RX ring, initialises the DMA engines, | |
751 | * allocates the IRQs and then starts the packet TX and RX | |
752 | * engines. | |
753 | */ | |
754 | static int | |
755 | ks8695_init_net(struct ks8695_priv *ksp) | |
756 | { | |
757 | int ret; | |
758 | u32 ctrl; | |
759 | ||
760 | ks8695_refill_rxbuffers(ksp); | |
761 | ||
762 | /* Initialise the DMA engines */ | |
763 | ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); | |
764 | ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); | |
765 | ||
766 | /* Request the IRQs */ | |
767 | ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, | |
768 | ks8695_rx_irq, ksp->ndev); | |
769 | if (ret) | |
770 | return ret; | |
771 | ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, | |
772 | ks8695_tx_irq, ksp->ndev); | |
773 | if (ret) | |
774 | return ret; | |
775 | if (ksp->link_irq != -1) { | |
776 | ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, | |
777 | ks8695_link_irq, ksp->ndev); | |
778 | if (ret) | |
779 | return ret; | |
780 | } | |
781 | ||
782 | /* Set up the ring indices */ | |
783 | ksp->next_rx_desc_read = 0; | |
784 | ksp->tx_ring_next_slot = 0; | |
785 | ksp->tx_ring_used = 0; | |
786 | ||
787 | /* Bring up transmission */ | |
788 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
789 | /* Enable packet transmission */ | |
790 | ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); | |
791 | ||
792 | /* Bring up the reception */ | |
793 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
794 | /* Enable packet reception */ | |
795 | ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); | |
796 | /* And start the DMA engine */ | |
797 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
798 | ||
799 | /* All done */ | |
800 | return 0; | |
801 | } | |
802 | ||
803 | /** | |
804 | * ks8695_release_device - HW resource release for KS8695 e-net | |
805 | * @ksp: The device to be freed | |
806 | * | |
807 | * This unallocates io memory regions, dma-coherent regions etc | |
808 | * which were allocated in ks8695_probe. | |
809 | */ | |
810 | static void | |
811 | ks8695_release_device(struct ks8695_priv *ksp) | |
812 | { | |
813 | /* Unmap the registers */ | |
814 | iounmap(ksp->io_regs); | |
815 | if (ksp->phyiface_regs) | |
816 | iounmap(ksp->phyiface_regs); | |
817 | ||
818 | /* And release the request */ | |
819 | release_resource(ksp->regs_req); | |
820 | kfree(ksp->regs_req); | |
821 | if (ksp->phyiface_req) { | |
822 | release_resource(ksp->phyiface_req); | |
823 | kfree(ksp->phyiface_req); | |
824 | } | |
825 | ||
826 | /* Free the ring buffers */ | |
827 | dma_free_coherent(ksp->dev, RING_DMA_SIZE, | |
828 | ksp->ring_base, ksp->ring_base_dma); | |
829 | } | |
830 | ||
831 | /* Ethtool support */ | |
832 | ||
833 | /** | |
834 | * ks8695_get_msglevel - Get the messages enabled for emission | |
835 | * @ndev: The network device to read from | |
836 | */ | |
837 | static u32 | |
838 | ks8695_get_msglevel(struct net_device *ndev) | |
839 | { | |
840 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
841 | ||
842 | return ksp->msg_enable; | |
843 | } | |
844 | ||
845 | /** | |
846 | * ks8695_set_msglevel - Set the messages enabled for emission | |
847 | * @ndev: The network device to configure | |
848 | * @value: The messages to set for emission | |
849 | */ | |
850 | static void | |
851 | ks8695_set_msglevel(struct net_device *ndev, u32 value) | |
852 | { | |
853 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
854 | ||
855 | ksp->msg_enable = value; | |
856 | } | |
857 | ||
858 | /** | |
c3d2a730 | 859 | * ks8695_wan_get_settings - Get device-specific settings. |
7a3c66e2 DS |
860 | * @ndev: The network device to read settings from |
861 | * @cmd: The ethtool structure to read into | |
862 | */ | |
863 | static int | |
c3d2a730 | 864 | ks8695_wan_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) |
7a3c66e2 DS |
865 | { |
866 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
867 | u32 ctrl; | |
868 | ||
869 | /* All ports on the KS8695 support these... */ | |
870 | cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
871 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
872 | SUPPORTED_TP | SUPPORTED_MII); | |
873 | cmd->transceiver = XCVR_INTERNAL; | |
874 | ||
c3d2a730 BH |
875 | cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; |
876 | cmd->port = PORT_MII; | |
877 | cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); | |
878 | cmd->phy_address = 0; | |
7a3c66e2 | 879 | |
c3d2a730 BH |
880 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
881 | if ((ctrl & WMC_WAND) == 0) { | |
882 | /* auto-negotiation is enabled */ | |
883 | cmd->advertising |= ADVERTISED_Autoneg; | |
884 | if (ctrl & WMC_WANA100F) | |
885 | cmd->advertising |= ADVERTISED_100baseT_Full; | |
886 | if (ctrl & WMC_WANA100H) | |
887 | cmd->advertising |= ADVERTISED_100baseT_Half; | |
888 | if (ctrl & WMC_WANA10F) | |
889 | cmd->advertising |= ADVERTISED_10baseT_Full; | |
890 | if (ctrl & WMC_WANA10H) | |
891 | cmd->advertising |= ADVERTISED_10baseT_Half; | |
892 | if (ctrl & WMC_WANAP) | |
893 | cmd->advertising |= ADVERTISED_Pause; | |
894 | cmd->autoneg = AUTONEG_ENABLE; | |
895 | ||
70739497 DD |
896 | ethtool_cmd_speed_set(cmd, |
897 | (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10); | |
c3d2a730 BH |
898 | cmd->duplex = (ctrl & WMC_WDS) ? |
899 | DUPLEX_FULL : DUPLEX_HALF; | |
900 | } else { | |
901 | /* auto-negotiation is disabled */ | |
902 | cmd->autoneg = AUTONEG_DISABLE; | |
7a3c66e2 | 903 | |
70739497 DD |
904 | ethtool_cmd_speed_set(cmd, ((ctrl & WMC_WANF100) ? |
905 | SPEED_100 : SPEED_10)); | |
c3d2a730 BH |
906 | cmd->duplex = (ctrl & WMC_WANFF) ? |
907 | DUPLEX_FULL : DUPLEX_HALF; | |
7a3c66e2 DS |
908 | } |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | /** | |
c3d2a730 | 914 | * ks8695_wan_set_settings - Set device-specific settings. |
7a3c66e2 DS |
915 | * @ndev: The network device to configure |
916 | * @cmd: The settings to configure | |
917 | */ | |
918 | static int | |
c3d2a730 | 919 | ks8695_wan_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) |
7a3c66e2 DS |
920 | { |
921 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
922 | u32 ctrl; | |
923 | ||
924 | if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) | |
925 | return -EINVAL; | |
926 | if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) | |
927 | return -EINVAL; | |
928 | if (cmd->port != PORT_MII) | |
929 | return -EINVAL; | |
930 | if (cmd->transceiver != XCVR_INTERNAL) | |
931 | return -EINVAL; | |
932 | if ((cmd->autoneg != AUTONEG_DISABLE) && | |
933 | (cmd->autoneg != AUTONEG_ENABLE)) | |
934 | return -EINVAL; | |
935 | ||
936 | if (cmd->autoneg == AUTONEG_ENABLE) { | |
937 | if ((cmd->advertising & (ADVERTISED_10baseT_Half | | |
938 | ADVERTISED_10baseT_Full | | |
939 | ADVERTISED_100baseT_Half | | |
940 | ADVERTISED_100baseT_Full)) == 0) | |
941 | return -EINVAL; | |
942 | ||
c3d2a730 | 943 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
7a3c66e2 | 944 | |
c3d2a730 BH |
945 | ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | |
946 | WMC_WANA10F | WMC_WANA10H); | |
947 | if (cmd->advertising & ADVERTISED_100baseT_Full) | |
948 | ctrl |= WMC_WANA100F; | |
949 | if (cmd->advertising & ADVERTISED_100baseT_Half) | |
950 | ctrl |= WMC_WANA100H; | |
951 | if (cmd->advertising & ADVERTISED_10baseT_Full) | |
952 | ctrl |= WMC_WANA10F; | |
953 | if (cmd->advertising & ADVERTISED_10baseT_Half) | |
954 | ctrl |= WMC_WANA10H; | |
955 | ||
956 | /* force a re-negotiation */ | |
957 | ctrl |= WMC_WANR; | |
958 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
7a3c66e2 | 959 | } else { |
c3d2a730 BH |
960 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
961 | ||
962 | /* disable auto-negotiation */ | |
963 | ctrl |= WMC_WAND; | |
964 | ctrl &= ~(WMC_WANF100 | WMC_WANFF); | |
965 | ||
966 | if (cmd->speed == SPEED_100) | |
967 | ctrl |= WMC_WANF100; | |
968 | if (cmd->duplex == DUPLEX_FULL) | |
969 | ctrl |= WMC_WANFF; | |
970 | ||
971 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
7a3c66e2 DS |
972 | } |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | /** | |
c3d2a730 | 978 | * ks8695_wan_nwayreset - Restart the autonegotiation on the port. |
7a3c66e2 DS |
979 | * @ndev: The network device to restart autoneotiation on |
980 | */ | |
981 | static int | |
c3d2a730 | 982 | ks8695_wan_nwayreset(struct net_device *ndev) |
7a3c66e2 DS |
983 | { |
984 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
985 | u32 ctrl; | |
986 | ||
c3d2a730 | 987 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
7a3c66e2 | 988 | |
c3d2a730 BH |
989 | if ((ctrl & WMC_WAND) == 0) |
990 | writel(ctrl | WMC_WANR, | |
991 | ksp->phyiface_regs + KS8695_WMC); | |
992 | else | |
993 | /* auto-negotiation not enabled */ | |
994 | return -EINVAL; | |
7a3c66e2 DS |
995 | |
996 | return 0; | |
997 | } | |
998 | ||
7a3c66e2 | 999 | /** |
c3d2a730 | 1000 | * ks8695_wan_get_pause - Retrieve network pause/flow-control advertising |
7a3c66e2 DS |
1001 | * @ndev: The device to retrieve settings from |
1002 | * @param: The structure to fill out with the information | |
1003 | */ | |
1004 | static void | |
c3d2a730 | 1005 | ks8695_wan_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) |
7a3c66e2 DS |
1006 | { |
1007 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1008 | u32 ctrl; | |
1009 | ||
c3d2a730 | 1010 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
7a3c66e2 | 1011 | |
c3d2a730 BH |
1012 | /* advertise Pause */ |
1013 | param->autoneg = (ctrl & WMC_WANAP); | |
7a3c66e2 | 1014 | |
c3d2a730 BH |
1015 | /* current Rx Flow-control */ |
1016 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1017 | param->rx_pause = (ctrl & DRXC_RFCE); | |
7a3c66e2 | 1018 | |
c3d2a730 BH |
1019 | /* current Tx Flow-control */ |
1020 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
1021 | param->tx_pause = (ctrl & DTXC_TFCE); | |
7a3c66e2 DS |
1022 | } |
1023 | ||
1024 | /** | |
1025 | * ks8695_get_drvinfo - Retrieve driver information | |
1026 | * @ndev: The network device to retrieve info about | |
1027 | * @info: The info structure to fill out. | |
1028 | */ | |
1029 | static void | |
1030 | ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) | |
1031 | { | |
1032 | strlcpy(info->driver, MODULENAME, sizeof(info->driver)); | |
1033 | strlcpy(info->version, MODULEVERSION, sizeof(info->version)); | |
c2313557 | 1034 | strlcpy(info->bus_info, dev_name(ndev->dev.parent), |
7a3c66e2 DS |
1035 | sizeof(info->bus_info)); |
1036 | } | |
1037 | ||
0fc0b732 | 1038 | static const struct ethtool_ops ks8695_ethtool_ops = { |
7a3c66e2 DS |
1039 | .get_msglevel = ks8695_get_msglevel, |
1040 | .set_msglevel = ks8695_set_msglevel, | |
c3d2a730 BH |
1041 | .get_drvinfo = ks8695_get_drvinfo, |
1042 | }; | |
1043 | ||
1044 | static const struct ethtool_ops ks8695_wan_ethtool_ops = { | |
1045 | .get_msglevel = ks8695_get_msglevel, | |
1046 | .set_msglevel = ks8695_set_msglevel, | |
1047 | .get_settings = ks8695_wan_get_settings, | |
1048 | .set_settings = ks8695_wan_set_settings, | |
1049 | .nway_reset = ks8695_wan_nwayreset, | |
5cd8a77d | 1050 | .get_link = ethtool_op_get_link, |
c3d2a730 | 1051 | .get_pauseparam = ks8695_wan_get_pause, |
7a3c66e2 DS |
1052 | .get_drvinfo = ks8695_get_drvinfo, |
1053 | }; | |
1054 | ||
1055 | /* Network device interface functions */ | |
1056 | ||
1057 | /** | |
1058 | * ks8695_set_mac - Update MAC in net dev and HW | |
1059 | * @ndev: The network device to update | |
1060 | * @addr: The new MAC address to set | |
1061 | */ | |
1062 | static int | |
1063 | ks8695_set_mac(struct net_device *ndev, void *addr) | |
1064 | { | |
1065 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1066 | struct sockaddr *address = addr; | |
1067 | ||
1068 | if (!is_valid_ether_addr(address->sa_data)) | |
1069 | return -EADDRNOTAVAIL; | |
1070 | ||
1071 | memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); | |
1072 | ||
1073 | ks8695_update_mac(ksp); | |
1074 | ||
1075 | dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", | |
1076 | ndev->name, ndev->dev_addr); | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | /** | |
1082 | * ks8695_set_multicast - Set up the multicast behaviour of the interface | |
1083 | * @ndev: The net_device to configure | |
1084 | * | |
1085 | * This routine, called by the net layer, configures promiscuity | |
1086 | * and multicast reception behaviour for the interface. | |
1087 | */ | |
1088 | static void | |
1089 | ks8695_set_multicast(struct net_device *ndev) | |
1090 | { | |
1091 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1092 | u32 ctrl; | |
1093 | ||
1094 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1095 | ||
1096 | if (ndev->flags & IFF_PROMISC) { | |
1097 | /* enable promiscuous mode */ | |
1098 | ctrl |= DRXC_RA; | |
1099 | } else if (ndev->flags & ~IFF_PROMISC) { | |
1100 | /* disable promiscuous mode */ | |
1101 | ctrl &= ~DRXC_RA; | |
1102 | } | |
1103 | ||
1104 | if (ndev->flags & IFF_ALLMULTI) { | |
1105 | /* enable all multicast mode */ | |
1106 | ctrl |= DRXC_RM; | |
4cd24eaf | 1107 | } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) { |
7a3c66e2 DS |
1108 | /* more specific multicast addresses than can be |
1109 | * handled in hardware | |
1110 | */ | |
1111 | ctrl |= DRXC_RM; | |
1112 | } else { | |
1113 | /* enable specific multicasts */ | |
1114 | ctrl &= ~DRXC_RM; | |
3b9a7728 | 1115 | ks8695_init_partial_multicast(ksp, ndev); |
7a3c66e2 DS |
1116 | } |
1117 | ||
1118 | ks8695_writereg(ksp, KS8695_DRXC, ctrl); | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * ks8695_timeout - Handle a network tx/rx timeout. | |
1123 | * @ndev: The net_device which timed out. | |
1124 | * | |
1125 | * A network transaction timed out, reset the device. | |
1126 | */ | |
1127 | static void | |
1128 | ks8695_timeout(struct net_device *ndev) | |
1129 | { | |
1130 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1131 | ||
1132 | netif_stop_queue(ndev); | |
1133 | ks8695_shutdown(ksp); | |
1134 | ||
1135 | ks8695_reset(ksp); | |
1136 | ||
1137 | ks8695_update_mac(ksp); | |
1138 | ||
1139 | /* We ignore the return from this since it managed to init | |
1140 | * before it probably will be okay to init again. | |
1141 | */ | |
1142 | ks8695_init_net(ksp); | |
1143 | ||
1144 | /* Reconfigure promiscuity etc */ | |
1145 | ks8695_set_multicast(ndev); | |
1146 | ||
1147 | /* And start the TX queue once more */ | |
1148 | netif_start_queue(ndev); | |
1149 | } | |
1150 | ||
1151 | /** | |
1152 | * ks8695_start_xmit - Start a packet transmission | |
1153 | * @skb: The packet to transmit | |
1154 | * @ndev: The network device to send the packet on | |
1155 | * | |
1156 | * This routine, called by the net layer, takes ownership of the | |
1157 | * sk_buff and adds it to the TX ring. It then kicks the TX DMA | |
1158 | * engine to ensure transmission begins. | |
1159 | */ | |
1160 | static int | |
1161 | ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1162 | { | |
1163 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1164 | int buff_n; | |
1165 | dma_addr_t dmap; | |
1166 | ||
1167 | spin_lock_irq(&ksp->txq_lock); | |
1168 | ||
1169 | if (ksp->tx_ring_used == MAX_TX_DESC) { | |
1170 | /* Somehow we got entered when we have no room */ | |
1171 | spin_unlock_irq(&ksp->txq_lock); | |
1172 | return NETDEV_TX_BUSY; | |
1173 | } | |
1174 | ||
1175 | buff_n = ksp->tx_ring_next_slot; | |
1176 | ||
1177 | BUG_ON(ksp->tx_buffers[buff_n].skb); | |
1178 | ||
1179 | dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); | |
1180 | if (unlikely(dma_mapping_error(ksp->dev, dmap))) { | |
1181 | /* Failed to DMA map this SKB, give it back for now */ | |
1182 | spin_unlock_irq(&ksp->txq_lock); | |
1183 | dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ | |
1184 | "transmission, trying later\n", ndev->name); | |
1185 | return NETDEV_TX_BUSY; | |
1186 | } | |
1187 | ||
1188 | ksp->tx_buffers[buff_n].dma_ptr = dmap; | |
1189 | /* Mapped okay, store the buffer pointer and length for later */ | |
1190 | ksp->tx_buffers[buff_n].skb = skb; | |
1191 | ksp->tx_buffers[buff_n].length = skb->len; | |
1192 | ||
1193 | /* Fill out the TX descriptor */ | |
1194 | ksp->tx_ring[buff_n].data_ptr = | |
1195 | cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); | |
1196 | ksp->tx_ring[buff_n].status = | |
1197 | cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | | |
1198 | (skb->len & TDES_TBS)); | |
1199 | ||
1200 | wmb(); | |
1201 | ||
1202 | /* Hand it over to the hardware */ | |
1203 | ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); | |
1204 | ||
1205 | if (++ksp->tx_ring_used == MAX_TX_DESC) | |
1206 | netif_stop_queue(ndev); | |
1207 | ||
7a3c66e2 DS |
1208 | /* Kick the TX DMA in case it decided to go IDLE */ |
1209 | ks8695_writereg(ksp, KS8695_DTSC, 0); | |
1210 | ||
1211 | /* And update the next ring slot */ | |
1212 | ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; | |
1213 | ||
1214 | spin_unlock_irq(&ksp->txq_lock); | |
1215 | return NETDEV_TX_OK; | |
1216 | } | |
1217 | ||
1218 | /** | |
1219 | * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface | |
1220 | * @ndev: The net_device to stop | |
1221 | * | |
1222 | * This disables the TX queue and cleans up a KS8695 ethernet | |
1223 | * device. | |
1224 | */ | |
1225 | static int | |
1226 | ks8695_stop(struct net_device *ndev) | |
1227 | { | |
1228 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1229 | ||
1230 | netif_stop_queue(ndev); | |
68d8287c | 1231 | napi_disable(&ksp->napi); |
7a3c66e2 DS |
1232 | |
1233 | ks8695_shutdown(ksp); | |
1234 | ||
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | /** | |
1239 | * ks8695_open - Open (bring up) a KS8695 ethernet interface | |
1240 | * @ndev: The net_device to open | |
1241 | * | |
1242 | * This resets, configures the MAC, initialises the RX ring and | |
1243 | * DMA engines and starts the TX queue for a KS8695 ethernet | |
1244 | * device. | |
1245 | */ | |
1246 | static int | |
1247 | ks8695_open(struct net_device *ndev) | |
1248 | { | |
1249 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1250 | int ret; | |
1251 | ||
7a3c66e2 DS |
1252 | ks8695_reset(ksp); |
1253 | ||
1254 | ks8695_update_mac(ksp); | |
1255 | ||
1256 | ret = ks8695_init_net(ksp); | |
1257 | if (ret) { | |
1258 | ks8695_shutdown(ksp); | |
1259 | return ret; | |
1260 | } | |
1261 | ||
68d8287c | 1262 | napi_enable(&ksp->napi); |
7a3c66e2 DS |
1263 | netif_start_queue(ndev); |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | /* Platform device driver */ | |
1269 | ||
1270 | /** | |
1271 | * ks8695_init_switch - Init LAN switch to known good defaults. | |
1272 | * @ksp: The device to initialise | |
1273 | * | |
1274 | * This initialises the LAN switch in the KS8695 to a known-good | |
1275 | * set of defaults. | |
1276 | */ | |
654b8c5c | 1277 | static void |
7a3c66e2 DS |
1278 | ks8695_init_switch(struct ks8695_priv *ksp) |
1279 | { | |
1280 | u32 ctrl; | |
1281 | ||
1282 | /* Default value for SEC0 according to datasheet */ | |
1283 | ctrl = 0x40819e00; | |
1284 | ||
1285 | /* LED0 = Speed LED1 = Link/Activity */ | |
1286 | ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); | |
1287 | ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); | |
1288 | ||
1289 | /* Enable Switch */ | |
1290 | ctrl |= SEC0_ENABLE; | |
1291 | ||
1292 | writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); | |
1293 | ||
1294 | /* Defaults for SEC1 */ | |
1295 | writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); | |
1296 | } | |
1297 | ||
1298 | /** | |
1299 | * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults | |
1300 | * @ksp: The device to initialise | |
1301 | * | |
1302 | * This initialises a KS8695's WAN phy to sensible values for | |
1303 | * autonegotiation etc. | |
1304 | */ | |
654b8c5c | 1305 | static void |
7a3c66e2 DS |
1306 | ks8695_init_wan_phy(struct ks8695_priv *ksp) |
1307 | { | |
1308 | u32 ctrl; | |
1309 | ||
1310 | /* Support auto-negotiation */ | |
1311 | ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | | |
1312 | WMC_WANA10F | WMC_WANA10H); | |
1313 | ||
1314 | /* LED0 = Activity , LED1 = Link */ | |
1315 | ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); | |
1316 | ||
1317 | /* Restart Auto-negotiation */ | |
1318 | ctrl |= WMC_WANR; | |
1319 | ||
1320 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1321 | ||
1322 | writel(0, ksp->phyiface_regs + KS8695_WPPM); | |
1323 | writel(0, ksp->phyiface_regs + KS8695_PPS); | |
1324 | } | |
1325 | ||
1326 | static const struct net_device_ops ks8695_netdev_ops = { | |
1327 | .ndo_open = ks8695_open, | |
1328 | .ndo_stop = ks8695_stop, | |
1329 | .ndo_start_xmit = ks8695_start_xmit, | |
1330 | .ndo_tx_timeout = ks8695_timeout, | |
1331 | .ndo_set_mac_address = ks8695_set_mac, | |
52255bbe | 1332 | .ndo_validate_addr = eth_validate_addr, |
afc4b13d | 1333 | .ndo_set_rx_mode = ks8695_set_multicast, |
7a3c66e2 DS |
1334 | }; |
1335 | ||
1336 | /** | |
1337 | * ks8695_probe - Probe and initialise a KS8695 ethernet interface | |
1338 | * @pdev: The platform device to probe | |
1339 | * | |
1340 | * Initialise a KS8695 ethernet device from platform data. | |
1341 | * | |
1342 | * This driver requires at least one IORESOURCE_MEM for the | |
1343 | * registers and two IORESOURCE_IRQ for the RX and TX IRQs | |
1344 | * respectively. It can optionally take an additional | |
1345 | * IORESOURCE_MEM for the switch or phy in the case of the lan or | |
1346 | * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan | |
1347 | * port. | |
1348 | */ | |
654b8c5c | 1349 | static int |
7a3c66e2 DS |
1350 | ks8695_probe(struct platform_device *pdev) |
1351 | { | |
1352 | struct ks8695_priv *ksp; | |
1353 | struct net_device *ndev; | |
1354 | struct resource *regs_res, *phyiface_res; | |
1355 | struct resource *rxirq_res, *txirq_res, *linkirq_res; | |
1356 | int ret = 0; | |
1357 | int buff_n; | |
1358 | u32 machigh, maclow; | |
1359 | ||
1360 | /* Initialise a net_device */ | |
1361 | ndev = alloc_etherdev(sizeof(struct ks8695_priv)); | |
41de8d4c | 1362 | if (!ndev) |
7a3c66e2 | 1363 | return -ENOMEM; |
7a3c66e2 DS |
1364 | |
1365 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1366 | ||
1367 | dev_dbg(&pdev->dev, "ks8695_probe() called\n"); | |
1368 | ||
1369 | /* Configure our private structure a little */ | |
1370 | ksp = netdev_priv(ndev); | |
7a3c66e2 DS |
1371 | |
1372 | ksp->dev = &pdev->dev; | |
1373 | ksp->ndev = ndev; | |
1374 | ksp->msg_enable = NETIF_MSG_LINK; | |
1375 | ||
1376 | /* Retrieve resources */ | |
1377 | regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1378 | phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1379 | ||
1380 | rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1381 | txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); | |
1382 | linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); | |
1383 | ||
1384 | if (!(regs_res && rxirq_res && txirq_res)) { | |
1385 | dev_err(ksp->dev, "insufficient resources\n"); | |
1386 | ret = -ENOENT; | |
1387 | goto failure; | |
1388 | } | |
1389 | ||
1390 | ksp->regs_req = request_mem_region(regs_res->start, | |
1391 | resource_size(regs_res), | |
1392 | pdev->name); | |
1393 | ||
1394 | if (!ksp->regs_req) { | |
1395 | dev_err(ksp->dev, "cannot claim register space\n"); | |
1396 | ret = -EIO; | |
1397 | goto failure; | |
1398 | } | |
1399 | ||
1400 | ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); | |
1401 | ||
1402 | if (!ksp->io_regs) { | |
1403 | dev_err(ksp->dev, "failed to ioremap registers\n"); | |
1404 | ret = -EINVAL; | |
1405 | goto failure; | |
1406 | } | |
1407 | ||
1408 | if (phyiface_res) { | |
1409 | ksp->phyiface_req = | |
1410 | request_mem_region(phyiface_res->start, | |
1411 | resource_size(phyiface_res), | |
1412 | phyiface_res->name); | |
1413 | ||
1414 | if (!ksp->phyiface_req) { | |
1415 | dev_err(ksp->dev, | |
1416 | "cannot claim switch register space\n"); | |
1417 | ret = -EIO; | |
1418 | goto failure; | |
1419 | } | |
1420 | ||
1421 | ksp->phyiface_regs = ioremap(phyiface_res->start, | |
1422 | resource_size(phyiface_res)); | |
1423 | ||
1424 | if (!ksp->phyiface_regs) { | |
1425 | dev_err(ksp->dev, | |
1426 | "failed to ioremap switch registers\n"); | |
1427 | ret = -EINVAL; | |
1428 | goto failure; | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | ksp->rx_irq = rxirq_res->start; | |
1433 | ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; | |
1434 | ksp->tx_irq = txirq_res->start; | |
1435 | ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; | |
1436 | ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); | |
1437 | ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? | |
1438 | linkirq_res->name : "Ethernet Link"; | |
1439 | ||
1440 | /* driver system setup */ | |
1441 | ndev->netdev_ops = &ks8695_netdev_ops; | |
7a3c66e2 DS |
1442 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); |
1443 | ||
68d8287c | 1444 | netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT); |
31b73ab3 | 1445 | |
7a3c66e2 DS |
1446 | /* Retrieve the default MAC addr from the chip. */ |
1447 | /* The bootloader should have left it in there for us. */ | |
1448 | ||
1449 | machigh = ks8695_readreg(ksp, KS8695_MAH); | |
1450 | maclow = ks8695_readreg(ksp, KS8695_MAL); | |
1451 | ||
1452 | ndev->dev_addr[0] = (machigh >> 8) & 0xFF; | |
1453 | ndev->dev_addr[1] = machigh & 0xFF; | |
1454 | ndev->dev_addr[2] = (maclow >> 24) & 0xFF; | |
1455 | ndev->dev_addr[3] = (maclow >> 16) & 0xFF; | |
1456 | ndev->dev_addr[4] = (maclow >> 8) & 0xFF; | |
1457 | ndev->dev_addr[5] = maclow & 0xFF; | |
1458 | ||
1459 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1460 | dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " | |
1461 | "set using ifconfig\n", ndev->name); | |
1462 | ||
1463 | /* In order to be efficient memory-wise, we allocate both | |
1464 | * rings in one go. | |
1465 | */ | |
1466 | ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, | |
1467 | &ksp->ring_base_dma, GFP_KERNEL); | |
1468 | if (!ksp->ring_base) { | |
1469 | ret = -ENOMEM; | |
1470 | goto failure; | |
1471 | } | |
1472 | ||
1473 | /* Specify the TX DMA ring buffer */ | |
1474 | ksp->tx_ring = ksp->ring_base; | |
1475 | ksp->tx_ring_dma = ksp->ring_base_dma; | |
1476 | ||
1477 | /* And initialise the queue's lock */ | |
1478 | spin_lock_init(&ksp->txq_lock); | |
31b73ab3 | 1479 | spin_lock_init(&ksp->rx_lock); |
7a3c66e2 DS |
1480 | |
1481 | /* Specify the RX DMA ring buffer */ | |
1482 | ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; | |
1483 | ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; | |
1484 | ||
1485 | /* Zero the descriptor rings */ | |
1486 | memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); | |
1487 | memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); | |
1488 | ||
1489 | /* Build the rings */ | |
1490 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
1491 | ksp->tx_ring[buff_n].next_desc = | |
1492 | cpu_to_le32(ksp->tx_ring_dma + | |
1493 | (sizeof(struct tx_ring_desc) * | |
1494 | ((buff_n + 1) & MAX_TX_DESC_MASK))); | |
1495 | } | |
1496 | ||
1497 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
1498 | ksp->rx_ring[buff_n].next_desc = | |
1499 | cpu_to_le32(ksp->rx_ring_dma + | |
1500 | (sizeof(struct rx_ring_desc) * | |
1501 | ((buff_n + 1) & MAX_RX_DESC_MASK))); | |
1502 | } | |
1503 | ||
1504 | /* Initialise the port (physically) */ | |
1505 | if (ksp->phyiface_regs && ksp->link_irq == -1) { | |
1506 | ks8695_init_switch(ksp); | |
1507 | ksp->dtype = KS8695_DTYPE_LAN; | |
c3d2a730 | 1508 | SET_ETHTOOL_OPS(ndev, &ks8695_ethtool_ops); |
7a3c66e2 DS |
1509 | } else if (ksp->phyiface_regs && ksp->link_irq != -1) { |
1510 | ks8695_init_wan_phy(ksp); | |
1511 | ksp->dtype = KS8695_DTYPE_WAN; | |
c3d2a730 | 1512 | SET_ETHTOOL_OPS(ndev, &ks8695_wan_ethtool_ops); |
7a3c66e2 DS |
1513 | } else { |
1514 | /* No initialisation since HPNA does not have a PHY */ | |
1515 | ksp->dtype = KS8695_DTYPE_HPNA; | |
c3d2a730 | 1516 | SET_ETHTOOL_OPS(ndev, &ks8695_ethtool_ops); |
7a3c66e2 DS |
1517 | } |
1518 | ||
1519 | /* And bring up the net_device with the net core */ | |
1520 | platform_set_drvdata(pdev, ndev); | |
1521 | ret = register_netdev(ndev); | |
1522 | ||
1523 | if (ret == 0) { | |
1524 | dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", | |
1525 | ks8695_port_type(ksp), ndev->dev_addr); | |
1526 | } else { | |
1527 | /* Report the failure to register the net_device */ | |
1528 | dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); | |
1529 | goto failure; | |
1530 | } | |
1531 | ||
1532 | /* All is well */ | |
1533 | return 0; | |
1534 | ||
1535 | /* Error exit path */ | |
1536 | failure: | |
1537 | ks8695_release_device(ksp); | |
1538 | free_netdev(ndev); | |
1539 | ||
1540 | return ret; | |
1541 | } | |
1542 | ||
1543 | /** | |
1544 | * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. | |
1545 | * @pdev: The device to suspend | |
1546 | * @state: The suspend state | |
1547 | * | |
1548 | * This routine detaches and shuts down a KS8695 ethernet device. | |
1549 | */ | |
1550 | static int | |
1551 | ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
1552 | { | |
1553 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1554 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1555 | ||
1556 | ksp->in_suspend = 1; | |
1557 | ||
1558 | if (netif_running(ndev)) { | |
1559 | netif_device_detach(ndev); | |
1560 | ks8695_shutdown(ksp); | |
1561 | } | |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | /** | |
1567 | * ks8695_drv_resume - Resume a KS8695 ethernet platform device. | |
1568 | * @pdev: The device to resume | |
1569 | * | |
1570 | * This routine re-initialises and re-attaches a KS8695 ethernet | |
1571 | * device. | |
1572 | */ | |
1573 | static int | |
1574 | ks8695_drv_resume(struct platform_device *pdev) | |
1575 | { | |
1576 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1577 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1578 | ||
1579 | if (netif_running(ndev)) { | |
1580 | ks8695_reset(ksp); | |
1581 | ks8695_init_net(ksp); | |
1582 | ks8695_set_multicast(ndev); | |
1583 | netif_device_attach(ndev); | |
1584 | } | |
1585 | ||
1586 | ksp->in_suspend = 0; | |
1587 | ||
1588 | return 0; | |
1589 | } | |
1590 | ||
1591 | /** | |
1592 | * ks8695_drv_remove - Remove a KS8695 net device on driver unload. | |
1593 | * @pdev: The platform device to remove | |
1594 | * | |
1595 | * This unregisters and releases a KS8695 ethernet device. | |
1596 | */ | |
654b8c5c | 1597 | static int |
7a3c66e2 DS |
1598 | ks8695_drv_remove(struct platform_device *pdev) |
1599 | { | |
1600 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1601 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1602 | ||
1603 | platform_set_drvdata(pdev, NULL); | |
31b73ab3 | 1604 | netif_napi_del(&ksp->napi); |
7a3c66e2 DS |
1605 | |
1606 | unregister_netdev(ndev); | |
1607 | ks8695_release_device(ksp); | |
1608 | free_netdev(ndev); | |
1609 | ||
1610 | dev_dbg(&pdev->dev, "released and freed device\n"); | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | static struct platform_driver ks8695_driver = { | |
1615 | .driver = { | |
1616 | .name = MODULENAME, | |
1617 | .owner = THIS_MODULE, | |
1618 | }, | |
1619 | .probe = ks8695_probe, | |
654b8c5c | 1620 | .remove = ks8695_drv_remove, |
7a3c66e2 DS |
1621 | .suspend = ks8695_drv_suspend, |
1622 | .resume = ks8695_drv_resume, | |
1623 | }; | |
1624 | ||
18e4a737 | 1625 | module_platform_driver(ks8695_driver); |
7a3c66e2 | 1626 | |
577d6a7c | 1627 | MODULE_AUTHOR("Simtec Electronics"); |
7a3c66e2 DS |
1628 | MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); |
1629 | MODULE_LICENSE("GPL"); | |
1630 | MODULE_ALIAS("platform:" MODULENAME); | |
1631 | ||
1632 | module_param(watchdog, int, 0400); | |
1633 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); |