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> | |
a6b7a407 | 24 | #include <linux/interrupt.h> |
7a3c66e2 DS |
25 | #include <linux/skbuff.h> |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/crc32.h> | |
28 | #include <linux/mii.h> | |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/platform_device.h> | |
32 | #include <linux/irq.h> | |
7a3c66e2 | 33 | #include <linux/io.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
7a3c66e2 DS |
35 | |
36 | #include <asm/irq.h> | |
37 | ||
38 | #include <mach/regs-switch.h> | |
39 | #include <mach/regs-misc.h> | |
31b73ab3 F |
40 | #include <asm/mach/irq.h> |
41 | #include <mach/regs-irq.h> | |
7a3c66e2 DS |
42 | |
43 | #include "ks8695net.h" | |
44 | ||
45 | #define MODULENAME "ks8695_ether" | |
68d8287c | 46 | #define MODULEVERSION "1.02" |
31b73ab3 | 47 | |
7a3c66e2 DS |
48 | /* |
49 | * Transmit and device reset timeout, default 5 seconds. | |
50 | */ | |
51 | static int watchdog = 5000; | |
52 | ||
53 | /* Hardware structures */ | |
54 | ||
55 | /** | |
56 | * struct rx_ring_desc - Receive descriptor ring element | |
57 | * @status: The status of the descriptor element (E.g. who owns it) | |
58 | * @length: The number of bytes in the block pointed to by data_ptr | |
59 | * @data_ptr: The physical address of the data block to receive into | |
60 | * @next_desc: The physical address of the next descriptor element. | |
61 | */ | |
62 | struct rx_ring_desc { | |
63 | __le32 status; | |
64 | __le32 length; | |
65 | __le32 data_ptr; | |
66 | __le32 next_desc; | |
67 | }; | |
68 | ||
69 | /** | |
70 | * struct tx_ring_desc - Transmit descriptor ring element | |
71 | * @owner: Who owns the descriptor | |
72 | * @status: The number of bytes in the block pointed to by data_ptr | |
73 | * @data_ptr: The physical address of the data block to receive into | |
74 | * @next_desc: The physical address of the next descriptor element. | |
75 | */ | |
76 | struct tx_ring_desc { | |
77 | __le32 owner; | |
78 | __le32 status; | |
79 | __le32 data_ptr; | |
80 | __le32 next_desc; | |
81 | }; | |
82 | ||
83 | /** | |
84 | * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. | |
85 | * @skb: The buffer in the ring | |
86 | * @dma_ptr: The mapped DMA pointer of the buffer | |
87 | * @length: The number of bytes mapped to dma_ptr | |
88 | */ | |
89 | struct ks8695_skbuff { | |
90 | struct sk_buff *skb; | |
91 | dma_addr_t dma_ptr; | |
92 | u32 length; | |
93 | }; | |
94 | ||
95 | /* Private device structure */ | |
96 | ||
97 | #define MAX_TX_DESC 8 | |
98 | #define MAX_TX_DESC_MASK 0x7 | |
99 | #define MAX_RX_DESC 16 | |
100 | #define MAX_RX_DESC_MASK 0xf | |
101 | ||
68d8287c F |
102 | /*napi_weight have better more than rx DMA buffers*/ |
103 | #define NAPI_WEIGHT 64 | |
104 | ||
7a3c66e2 DS |
105 | #define MAX_RXBUF_SIZE 0x700 |
106 | ||
107 | #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) | |
108 | #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) | |
109 | #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) | |
110 | ||
111 | /** | |
112 | * enum ks8695_dtype - Device type | |
113 | * @KS8695_DTYPE_WAN: This device is a WAN interface | |
114 | * @KS8695_DTYPE_LAN: This device is a LAN interface | |
115 | * @KS8695_DTYPE_HPNA: This device is an HPNA interface | |
116 | */ | |
117 | enum ks8695_dtype { | |
118 | KS8695_DTYPE_WAN, | |
119 | KS8695_DTYPE_LAN, | |
120 | KS8695_DTYPE_HPNA, | |
121 | }; | |
122 | ||
123 | /** | |
124 | * struct ks8695_priv - Private data for the KS8695 Ethernet | |
125 | * @in_suspend: Flag to indicate if we're suspending/resuming | |
126 | * @ndev: The net_device for this interface | |
127 | * @dev: The platform device object for this interface | |
128 | * @dtype: The type of this device | |
129 | * @io_regs: The ioremapped registers for this interface | |
68d8287c | 130 | * @napi : Add support NAPI for Rx |
7a3c66e2 DS |
131 | * @rx_irq_name: The textual name of the RX IRQ from the platform data |
132 | * @tx_irq_name: The textual name of the TX IRQ from the platform data | |
133 | * @link_irq_name: The textual name of the link IRQ from the | |
134 | * platform data if available | |
135 | * @rx_irq: The IRQ number for the RX IRQ | |
136 | * @tx_irq: The IRQ number for the TX IRQ | |
137 | * @link_irq: The IRQ number for the link IRQ if available | |
138 | * @regs_req: The resource request for the registers region | |
139 | * @phyiface_req: The resource request for the phy/switch region | |
140 | * if available | |
141 | * @phyiface_regs: The ioremapped registers for the phy/switch if available | |
142 | * @ring_base: The base pointer of the dma coherent memory for the rings | |
143 | * @ring_base_dma: The DMA mapped equivalent of ring_base | |
144 | * @tx_ring: The pointer in ring_base of the TX ring | |
145 | * @tx_ring_used: The number of slots in the TX ring which are occupied | |
146 | * @tx_ring_next_slot: The next slot to fill in the TX ring | |
147 | * @tx_ring_dma: The DMA mapped equivalent of tx_ring | |
148 | * @tx_buffers: The sk_buff mappings for the TX ring | |
149 | * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables | |
150 | * @rx_ring: The pointer in ring_base of the RX ring | |
151 | * @rx_ring_dma: The DMA mapped equivalent of rx_ring | |
152 | * @rx_buffers: The sk_buff mappings for the RX ring | |
153 | * @next_rx_desc_read: The next RX descriptor to read from on IRQ | |
68d8287c | 154 | * @rx_lock: A lock to protect Rx irq function |
7a3c66e2 DS |
155 | * @msg_enable: The flags for which messages to emit |
156 | */ | |
157 | struct ks8695_priv { | |
158 | int in_suspend; | |
159 | struct net_device *ndev; | |
160 | struct device *dev; | |
161 | enum ks8695_dtype dtype; | |
162 | void __iomem *io_regs; | |
163 | ||
31b73ab3 F |
164 | struct napi_struct napi; |
165 | ||
7a3c66e2 DS |
166 | const char *rx_irq_name, *tx_irq_name, *link_irq_name; |
167 | int rx_irq, tx_irq, link_irq; | |
168 | ||
169 | struct resource *regs_req, *phyiface_req; | |
170 | void __iomem *phyiface_regs; | |
171 | ||
172 | void *ring_base; | |
173 | dma_addr_t ring_base_dma; | |
174 | ||
175 | struct tx_ring_desc *tx_ring; | |
176 | int tx_ring_used; | |
177 | int tx_ring_next_slot; | |
178 | dma_addr_t tx_ring_dma; | |
179 | struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; | |
180 | spinlock_t txq_lock; | |
181 | ||
182 | struct rx_ring_desc *rx_ring; | |
183 | dma_addr_t rx_ring_dma; | |
184 | struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; | |
185 | int next_rx_desc_read; | |
31b73ab3 | 186 | spinlock_t rx_lock; |
7a3c66e2 DS |
187 | |
188 | int msg_enable; | |
189 | }; | |
190 | ||
191 | /* Register access */ | |
192 | ||
193 | /** | |
194 | * ks8695_readreg - Read from a KS8695 ethernet register | |
195 | * @ksp: The device to read from | |
196 | * @reg: The register to read | |
197 | */ | |
198 | static inline u32 | |
199 | ks8695_readreg(struct ks8695_priv *ksp, int reg) | |
200 | { | |
201 | return readl(ksp->io_regs + reg); | |
202 | } | |
203 | ||
204 | /** | |
205 | * ks8695_writereg - Write to a KS8695 ethernet register | |
206 | * @ksp: The device to write to | |
207 | * @reg: The register to write | |
208 | * @value: The value to write to the register | |
209 | */ | |
210 | static inline void | |
211 | ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) | |
212 | { | |
213 | writel(value, ksp->io_regs + reg); | |
214 | } | |
215 | ||
216 | /* Utility functions */ | |
217 | ||
218 | /** | |
219 | * ks8695_port_type - Retrieve port-type as user-friendly string | |
220 | * @ksp: The device to return the type for | |
221 | * | |
222 | * Returns a string indicating which of the WAN, LAN or HPNA | |
223 | * ports this device is likely to represent. | |
224 | */ | |
225 | static const char * | |
226 | ks8695_port_type(struct ks8695_priv *ksp) | |
227 | { | |
228 | switch (ksp->dtype) { | |
229 | case KS8695_DTYPE_LAN: | |
230 | return "LAN"; | |
231 | case KS8695_DTYPE_WAN: | |
232 | return "WAN"; | |
233 | case KS8695_DTYPE_HPNA: | |
234 | return "HPNA"; | |
235 | } | |
236 | ||
237 | return "UNKNOWN"; | |
238 | } | |
239 | ||
240 | /** | |
241 | * ks8695_update_mac - Update the MAC registers in the device | |
242 | * @ksp: The device to update | |
243 | * | |
244 | * Updates the MAC registers in the KS8695 device from the address in the | |
245 | * net_device structure associated with this interface. | |
246 | */ | |
247 | static void | |
248 | ks8695_update_mac(struct ks8695_priv *ksp) | |
249 | { | |
250 | /* Update the HW with the MAC from the net_device */ | |
251 | struct net_device *ndev = ksp->ndev; | |
252 | u32 machigh, maclow; | |
253 | ||
254 | maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | | |
255 | (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); | |
256 | machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); | |
257 | ||
258 | ks8695_writereg(ksp, KS8695_MAL, maclow); | |
259 | ks8695_writereg(ksp, KS8695_MAH, machigh); | |
260 | ||
261 | } | |
262 | ||
263 | /** | |
264 | * ks8695_refill_rxbuffers - Re-fill the RX buffer ring | |
265 | * @ksp: The device to refill | |
266 | * | |
267 | * Iterates the RX ring of the device looking for empty slots. | |
268 | * For each empty slot, we allocate and map a new SKB and give it | |
269 | * to the hardware. | |
270 | * This can be called from interrupt context safely. | |
271 | */ | |
272 | static void | |
273 | ks8695_refill_rxbuffers(struct ks8695_priv *ksp) | |
274 | { | |
275 | /* Run around the RX ring, filling in any missing sk_buff's */ | |
276 | int buff_n; | |
277 | ||
278 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
279 | if (!ksp->rx_buffers[buff_n].skb) { | |
c056b734 PD |
280 | struct sk_buff *skb = |
281 | netdev_alloc_skb(ksp->ndev, MAX_RXBUF_SIZE); | |
7a3c66e2 DS |
282 | dma_addr_t mapping; |
283 | ||
284 | ksp->rx_buffers[buff_n].skb = skb; | |
285 | if (skb == NULL) { | |
286 | /* Failed to allocate one, perhaps | |
287 | * we'll try again later. | |
288 | */ | |
289 | break; | |
290 | } | |
291 | ||
292 | mapping = dma_map_single(ksp->dev, skb->data, | |
293 | MAX_RXBUF_SIZE, | |
294 | DMA_FROM_DEVICE); | |
295 | if (unlikely(dma_mapping_error(ksp->dev, mapping))) { | |
296 | /* Failed to DMA map this SKB, try later */ | |
297 | dev_kfree_skb_irq(skb); | |
298 | ksp->rx_buffers[buff_n].skb = NULL; | |
299 | break; | |
300 | } | |
301 | ksp->rx_buffers[buff_n].dma_ptr = mapping; | |
7a3c66e2 DS |
302 | ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; |
303 | ||
304 | /* Record this into the DMA ring */ | |
305 | ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); | |
306 | ksp->rx_ring[buff_n].length = | |
307 | cpu_to_le32(MAX_RXBUF_SIZE); | |
308 | ||
309 | wmb(); | |
310 | ||
311 | /* And give ownership over to the hardware */ | |
312 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
317 | /* Maximum number of multicast addresses which the KS8695 HW supports */ | |
318 | #define KS8695_NR_ADDRESSES 16 | |
319 | ||
320 | /** | |
321 | * ks8695_init_partial_multicast - Init the mcast addr registers | |
322 | * @ksp: The device to initialise | |
323 | * @addr: The multicast address list to use | |
324 | * @nr_addr: The number of addresses in the list | |
325 | * | |
326 | * This routine is a helper for ks8695_set_multicast - it writes | |
327 | * the additional-address registers in the KS8695 ethernet device | |
328 | * and cleans up any others left behind. | |
329 | */ | |
330 | static void | |
331 | ks8695_init_partial_multicast(struct ks8695_priv *ksp, | |
3b9a7728 | 332 | struct net_device *ndev) |
7a3c66e2 DS |
333 | { |
334 | u32 low, high; | |
335 | int i; | |
22bedad3 | 336 | struct netdev_hw_addr *ha; |
7a3c66e2 | 337 | |
3b9a7728 | 338 | i = 0; |
22bedad3 | 339 | netdev_for_each_mc_addr(ha, ndev) { |
7a3c66e2 DS |
340 | /* Ran out of space in chip? */ |
341 | BUG_ON(i == KS8695_NR_ADDRESSES); | |
342 | ||
22bedad3 JP |
343 | low = (ha->addr[2] << 24) | (ha->addr[3] << 16) | |
344 | (ha->addr[4] << 8) | (ha->addr[5]); | |
345 | high = (ha->addr[0] << 8) | (ha->addr[1]); | |
7a3c66e2 DS |
346 | |
347 | ks8695_writereg(ksp, KS8695_AAL_(i), low); | |
348 | ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); | |
3b9a7728 | 349 | i++; |
7a3c66e2 DS |
350 | } |
351 | ||
352 | /* Clear the remaining Additional Station Addresses */ | |
353 | for (; i < KS8695_NR_ADDRESSES; i++) { | |
354 | ks8695_writereg(ksp, KS8695_AAL_(i), 0); | |
355 | ks8695_writereg(ksp, KS8695_AAH_(i), 0); | |
356 | } | |
357 | } | |
358 | ||
359 | /* Interrupt handling */ | |
360 | ||
361 | /** | |
362 | * ks8695_tx_irq - Transmit IRQ handler | |
363 | * @irq: The IRQ which went off (ignored) | |
364 | * @dev_id: The net_device for the interrupt | |
365 | * | |
366 | * Process the TX ring, clearing out any transmitted slots. | |
367 | * Allows the net_device to pass us new packets once slots are | |
368 | * freed. | |
369 | */ | |
370 | static irqreturn_t | |
371 | ks8695_tx_irq(int irq, void *dev_id) | |
372 | { | |
373 | struct net_device *ndev = (struct net_device *)dev_id; | |
374 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
375 | int buff_n; | |
376 | ||
377 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
378 | if (ksp->tx_buffers[buff_n].skb && | |
379 | !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) { | |
380 | rmb(); | |
381 | /* An SKB which is not owned by HW is present */ | |
382 | /* Update the stats for the net_device */ | |
383 | ndev->stats.tx_packets++; | |
384 | ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length; | |
385 | ||
386 | /* Free the packet from the ring */ | |
387 | ksp->tx_ring[buff_n].data_ptr = 0; | |
388 | ||
389 | /* Free the sk_buff */ | |
390 | dma_unmap_single(ksp->dev, | |
391 | ksp->tx_buffers[buff_n].dma_ptr, | |
392 | ksp->tx_buffers[buff_n].length, | |
393 | DMA_TO_DEVICE); | |
394 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
395 | ksp->tx_buffers[buff_n].skb = NULL; | |
396 | ksp->tx_ring_used--; | |
397 | } | |
398 | } | |
399 | ||
400 | netif_wake_queue(ndev); | |
401 | ||
402 | return IRQ_HANDLED; | |
403 | } | |
404 | ||
68d8287c F |
405 | /** |
406 | * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit | |
407 | * @ksp: Private data for the KS8695 Ethernet | |
408 | * | |
409 | * For KS8695 document: | |
410 | * Interrupt Enable Register (offset 0xE204) | |
411 | * Bit29 : WAN MAC Receive Interrupt Enable | |
412 | * Bit16 : LAN MAC Receive Interrupt Enable | |
413 | * Interrupt Status Register (Offset 0xF208) | |
414 | * Bit29: WAN MAC Receive Status | |
415 | * Bit16: LAN MAC Receive Status | |
fb914ebf | 416 | * So, this Rx interrupt enable/status bit number is equal |
68d8287c F |
417 | * as Rx IRQ number. |
418 | */ | |
419 | static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp) | |
420 | { | |
421 | return ksp->rx_irq; | |
422 | } | |
423 | ||
7a3c66e2 DS |
424 | /** |
425 | * ks8695_rx_irq - Receive IRQ handler | |
426 | * @irq: The IRQ which went off (ignored) | |
427 | * @dev_id: The net_device for the interrupt | |
428 | * | |
68d8287c | 429 | * Inform NAPI that packet reception needs to be scheduled |
7a3c66e2 | 430 | */ |
31b73ab3 | 431 | |
7a3c66e2 DS |
432 | static irqreturn_t |
433 | ks8695_rx_irq(int irq, void *dev_id) | |
434 | { | |
435 | struct net_device *ndev = (struct net_device *)dev_id; | |
31b73ab3 | 436 | struct ks8695_priv *ksp = netdev_priv(ndev); |
31b73ab3 F |
437 | |
438 | spin_lock(&ksp->rx_lock); | |
439 | ||
fa6cae14 | 440 | if (napi_schedule_prep(&ksp->napi)) { |
441 | unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN); | |
442 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
443 | /*disable rx interrupt*/ | |
444 | status &= ~mask_bit; | |
445 | writel(status , KS8695_IRQ_VA + KS8695_INTEN); | |
446 | __napi_schedule(&ksp->napi); | |
31b73ab3 F |
447 | } |
448 | ||
449 | spin_unlock(&ksp->rx_lock); | |
450 | return IRQ_HANDLED; | |
451 | } | |
452 | ||
68d8287c | 453 | /** |
ea93fd94 | 454 | * ks8695_rx - Receive packets called by NAPI poll method |
68d8287c | 455 | * @ksp: Private data for the KS8695 Ethernet |
ea93fd94 | 456 | * @budget: Number of packets allowed to process |
68d8287c | 457 | */ |
68d8287c | 458 | static int ks8695_rx(struct ks8695_priv *ksp, int budget) |
31b73ab3 | 459 | { |
68d8287c | 460 | struct net_device *ndev = ksp->ndev; |
7a3c66e2 DS |
461 | struct sk_buff *skb; |
462 | int buff_n; | |
463 | u32 flags; | |
464 | int pktlen; | |
31b73ab3 | 465 | int received = 0; |
7a3c66e2 DS |
466 | |
467 | buff_n = ksp->next_rx_desc_read; | |
31b73ab3 F |
468 | while (received < budget |
469 | && ksp->rx_buffers[buff_n].skb | |
470 | && (!(ksp->rx_ring[buff_n].status & | |
471 | cpu_to_le32(RDES_OWN)))) { | |
7a3c66e2 DS |
472 | rmb(); |
473 | flags = le32_to_cpu(ksp->rx_ring[buff_n].status); | |
ea93fd94 | 474 | |
7a3c66e2 DS |
475 | /* Found an SKB which we own, this means we |
476 | * received a packet | |
477 | */ | |
478 | if ((flags & (RDES_FS | RDES_LS)) != | |
479 | (RDES_FS | RDES_LS)) { | |
480 | /* This packet is not the first and | |
481 | * the last segment. Therefore it is | |
482 | * a "spanning" packet and we can't | |
483 | * handle it | |
484 | */ | |
485 | goto rx_failure; | |
486 | } | |
487 | ||
488 | if (flags & (RDES_ES | RDES_RE)) { | |
489 | /* It's an error packet */ | |
490 | ndev->stats.rx_errors++; | |
491 | if (flags & RDES_TL) | |
492 | ndev->stats.rx_length_errors++; | |
493 | if (flags & RDES_RF) | |
494 | ndev->stats.rx_length_errors++; | |
495 | if (flags & RDES_CE) | |
496 | ndev->stats.rx_crc_errors++; | |
497 | if (flags & RDES_RE) | |
498 | ndev->stats.rx_missed_errors++; | |
499 | ||
500 | goto rx_failure; | |
501 | } | |
502 | ||
503 | pktlen = flags & RDES_FLEN; | |
504 | pktlen -= 4; /* Drop the CRC */ | |
505 | ||
506 | /* Retrieve the sk_buff */ | |
507 | skb = ksp->rx_buffers[buff_n].skb; | |
508 | ||
509 | /* Clear it from the ring */ | |
510 | ksp->rx_buffers[buff_n].skb = NULL; | |
511 | ksp->rx_ring[buff_n].data_ptr = 0; | |
512 | ||
513 | /* Unmap the SKB */ | |
514 | dma_unmap_single(ksp->dev, | |
515 | ksp->rx_buffers[buff_n].dma_ptr, | |
516 | ksp->rx_buffers[buff_n].length, | |
517 | DMA_FROM_DEVICE); | |
518 | ||
519 | /* Relinquish the SKB to the network layer */ | |
520 | skb_put(skb, pktlen); | |
521 | skb->protocol = eth_type_trans(skb, ndev); | |
31b73ab3 | 522 | netif_receive_skb(skb); |
7a3c66e2 DS |
523 | |
524 | /* Record stats */ | |
7a3c66e2 DS |
525 | ndev->stats.rx_packets++; |
526 | ndev->stats.rx_bytes += pktlen; | |
527 | goto rx_finished; | |
528 | ||
529 | rx_failure: | |
530 | /* This ring entry is an error, but we can | |
531 | * re-use the skb | |
532 | */ | |
533 | /* Give the ring entry back to the hardware */ | |
534 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
535 | rx_finished: | |
31b73ab3 | 536 | received++; |
31b73ab3 | 537 | buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; |
31b73ab3 | 538 | } |
ea93fd94 YY |
539 | |
540 | /* And note which RX descriptor we last did */ | |
541 | ksp->next_rx_desc_read = buff_n; | |
542 | ||
5c427ff9 | 543 | /* And refill the buffers */ |
544 | ks8695_refill_rxbuffers(ksp); | |
545 | ||
ea93fd94 | 546 | /* Kick the RX DMA engine, in case it became suspended */ |
5c427ff9 | 547 | ks8695_writereg(ksp, KS8695_DRSC, 0); |
ea93fd94 | 548 | |
31b73ab3 F |
549 | return received; |
550 | } | |
7a3c66e2 | 551 | |
68d8287c F |
552 | |
553 | /** | |
554 | * ks8695_poll - Receive packet by NAPI poll method | |
555 | * @ksp: Private data for the KS8695 Ethernet | |
556 | * @budget: The remaining number packets for network subsystem | |
557 | * | |
558 | * Invoked by the network core when it requests for new | |
559 | * packets from the driver | |
560 | */ | |
31b73ab3 F |
561 | static int ks8695_poll(struct napi_struct *napi, int budget) |
562 | { | |
563 | struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi); | |
68d8287c | 564 | unsigned long work_done; |
31b73ab3 | 565 | |
68d8287c F |
566 | unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN); |
567 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
31b73ab3 | 568 | |
68d8287c | 569 | work_done = ks8695_rx(ksp, budget); |
31b73ab3 F |
570 | |
571 | if (work_done < budget) { | |
572 | unsigned long flags; | |
573 | spin_lock_irqsave(&ksp->rx_lock, flags); | |
b96b894c | 574 | __napi_complete(napi); |
31b73ab3 F |
575 | /*enable rx interrupt*/ |
576 | writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN); | |
31b73ab3 F |
577 | spin_unlock_irqrestore(&ksp->rx_lock, flags); |
578 | } | |
579 | return work_done; | |
7a3c66e2 DS |
580 | } |
581 | ||
582 | /** | |
583 | * ks8695_link_irq - Link change IRQ handler | |
584 | * @irq: The IRQ which went off (ignored) | |
585 | * @dev_id: The net_device for the interrupt | |
586 | * | |
587 | * The WAN interface can generate an IRQ when the link changes, | |
588 | * report this to the net layer and the user. | |
589 | */ | |
590 | static irqreturn_t | |
591 | ks8695_link_irq(int irq, void *dev_id) | |
592 | { | |
593 | struct net_device *ndev = (struct net_device *)dev_id; | |
594 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
595 | u32 ctrl; | |
596 | ||
597 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
598 | if (ctrl & WMC_WLS) { | |
599 | netif_carrier_on(ndev); | |
600 | if (netif_msg_link(ksp)) | |
601 | dev_info(ksp->dev, | |
602 | "%s: Link is now up (10%sMbps/%s-duplex)\n", | |
603 | ndev->name, | |
604 | (ctrl & WMC_WSS) ? "0" : "", | |
605 | (ctrl & WMC_WDS) ? "Full" : "Half"); | |
606 | } else { | |
607 | netif_carrier_off(ndev); | |
608 | if (netif_msg_link(ksp)) | |
609 | dev_info(ksp->dev, "%s: Link is now down.\n", | |
610 | ndev->name); | |
611 | } | |
612 | ||
613 | return IRQ_HANDLED; | |
614 | } | |
615 | ||
616 | ||
617 | /* KS8695 Device functions */ | |
618 | ||
619 | /** | |
620 | * ks8695_reset - Reset a KS8695 ethernet interface | |
621 | * @ksp: The interface to reset | |
622 | * | |
623 | * Perform an engine reset of the interface and re-program it | |
624 | * with sensible defaults. | |
625 | */ | |
626 | static void | |
627 | ks8695_reset(struct ks8695_priv *ksp) | |
628 | { | |
629 | int reset_timeout = watchdog; | |
630 | /* Issue the reset via the TX DMA control register */ | |
631 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); | |
632 | while (reset_timeout--) { | |
633 | if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) | |
634 | break; | |
635 | msleep(1); | |
636 | } | |
637 | ||
858b9ced | 638 | if (reset_timeout < 0) { |
7a3c66e2 DS |
639 | dev_crit(ksp->dev, |
640 | "Timeout waiting for DMA engines to reset\n"); | |
641 | /* And blithely carry on */ | |
642 | } | |
643 | ||
644 | /* Definitely wait long enough before attempting to program | |
645 | * the engines | |
646 | */ | |
647 | msleep(10); | |
648 | ||
649 | /* RX: unicast and broadcast */ | |
650 | ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); | |
651 | /* TX: pad and add CRC */ | |
652 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); | |
653 | } | |
654 | ||
655 | /** | |
656 | * ks8695_shutdown - Shut down a KS8695 ethernet interface | |
657 | * @ksp: The interface to shut down | |
658 | * | |
659 | * This disables packet RX/TX, cleans up IRQs, drains the rings, | |
660 | * and basically places the interface into a clean shutdown | |
661 | * state. | |
662 | */ | |
663 | static void | |
664 | ks8695_shutdown(struct ks8695_priv *ksp) | |
665 | { | |
666 | u32 ctrl; | |
667 | int buff_n; | |
668 | ||
669 | /* Disable packet transmission */ | |
670 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
671 | ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); | |
672 | ||
673 | /* Disable packet reception */ | |
674 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
675 | ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); | |
676 | ||
677 | /* Release the IRQs */ | |
678 | free_irq(ksp->rx_irq, ksp->ndev); | |
679 | free_irq(ksp->tx_irq, ksp->ndev); | |
680 | if (ksp->link_irq != -1) | |
681 | free_irq(ksp->link_irq, ksp->ndev); | |
682 | ||
683 | /* Throw away any pending TX packets */ | |
684 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
685 | if (ksp->tx_buffers[buff_n].skb) { | |
686 | /* Remove this SKB from the TX ring */ | |
687 | ksp->tx_ring[buff_n].owner = 0; | |
688 | ksp->tx_ring[buff_n].status = 0; | |
689 | ksp->tx_ring[buff_n].data_ptr = 0; | |
690 | ||
691 | /* Unmap and bin this SKB */ | |
692 | dma_unmap_single(ksp->dev, | |
693 | ksp->tx_buffers[buff_n].dma_ptr, | |
694 | ksp->tx_buffers[buff_n].length, | |
695 | DMA_TO_DEVICE); | |
696 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
697 | ksp->tx_buffers[buff_n].skb = NULL; | |
698 | } | |
699 | } | |
700 | ||
701 | /* Purge the RX buffers */ | |
702 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
703 | if (ksp->rx_buffers[buff_n].skb) { | |
704 | /* Remove the SKB from the RX ring */ | |
705 | ksp->rx_ring[buff_n].status = 0; | |
706 | ksp->rx_ring[buff_n].data_ptr = 0; | |
707 | ||
708 | /* Unmap and bin the SKB */ | |
709 | dma_unmap_single(ksp->dev, | |
710 | ksp->rx_buffers[buff_n].dma_ptr, | |
711 | ksp->rx_buffers[buff_n].length, | |
712 | DMA_FROM_DEVICE); | |
713 | dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); | |
714 | ksp->rx_buffers[buff_n].skb = NULL; | |
715 | } | |
716 | } | |
717 | } | |
718 | ||
719 | ||
720 | /** | |
721 | * ks8695_setup_irq - IRQ setup helper function | |
722 | * @irq: The IRQ number to claim | |
723 | * @irq_name: The name to give the IRQ claimant | |
724 | * @handler: The function to call to handle the IRQ | |
725 | * @ndev: The net_device to pass in as the dev_id argument to the handler | |
726 | * | |
727 | * Return 0 on success. | |
728 | */ | |
729 | static int | |
730 | ks8695_setup_irq(int irq, const char *irq_name, | |
731 | irq_handler_t handler, struct net_device *ndev) | |
732 | { | |
733 | int ret; | |
734 | ||
735 | ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); | |
736 | ||
737 | if (ret) { | |
738 | dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); | |
739 | return ret; | |
740 | } | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | /** | |
746 | * ks8695_init_net - Initialise a KS8695 ethernet interface | |
747 | * @ksp: The interface to initialise | |
748 | * | |
749 | * This routine fills the RX ring, initialises the DMA engines, | |
750 | * allocates the IRQs and then starts the packet TX and RX | |
751 | * engines. | |
752 | */ | |
753 | static int | |
754 | ks8695_init_net(struct ks8695_priv *ksp) | |
755 | { | |
756 | int ret; | |
757 | u32 ctrl; | |
758 | ||
759 | ks8695_refill_rxbuffers(ksp); | |
760 | ||
761 | /* Initialise the DMA engines */ | |
762 | ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); | |
763 | ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); | |
764 | ||
765 | /* Request the IRQs */ | |
766 | ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, | |
767 | ks8695_rx_irq, ksp->ndev); | |
768 | if (ret) | |
769 | return ret; | |
770 | ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, | |
771 | ks8695_tx_irq, ksp->ndev); | |
772 | if (ret) | |
773 | return ret; | |
774 | if (ksp->link_irq != -1) { | |
775 | ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, | |
776 | ks8695_link_irq, ksp->ndev); | |
777 | if (ret) | |
778 | return ret; | |
779 | } | |
780 | ||
781 | /* Set up the ring indices */ | |
782 | ksp->next_rx_desc_read = 0; | |
783 | ksp->tx_ring_next_slot = 0; | |
784 | ksp->tx_ring_used = 0; | |
785 | ||
786 | /* Bring up transmission */ | |
787 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
788 | /* Enable packet transmission */ | |
789 | ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); | |
790 | ||
791 | /* Bring up the reception */ | |
792 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
793 | /* Enable packet reception */ | |
794 | ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); | |
795 | /* And start the DMA engine */ | |
796 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
797 | ||
798 | /* All done */ | |
799 | return 0; | |
800 | } | |
801 | ||
802 | /** | |
803 | * ks8695_release_device - HW resource release for KS8695 e-net | |
804 | * @ksp: The device to be freed | |
805 | * | |
806 | * This unallocates io memory regions, dma-coherent regions etc | |
807 | * which were allocated in ks8695_probe. | |
808 | */ | |
809 | static void | |
810 | ks8695_release_device(struct ks8695_priv *ksp) | |
811 | { | |
812 | /* Unmap the registers */ | |
813 | iounmap(ksp->io_regs); | |
814 | if (ksp->phyiface_regs) | |
815 | iounmap(ksp->phyiface_regs); | |
816 | ||
817 | /* And release the request */ | |
818 | release_resource(ksp->regs_req); | |
819 | kfree(ksp->regs_req); | |
820 | if (ksp->phyiface_req) { | |
821 | release_resource(ksp->phyiface_req); | |
822 | kfree(ksp->phyiface_req); | |
823 | } | |
824 | ||
825 | /* Free the ring buffers */ | |
826 | dma_free_coherent(ksp->dev, RING_DMA_SIZE, | |
827 | ksp->ring_base, ksp->ring_base_dma); | |
828 | } | |
829 | ||
830 | /* Ethtool support */ | |
831 | ||
832 | /** | |
833 | * ks8695_get_msglevel - Get the messages enabled for emission | |
834 | * @ndev: The network device to read from | |
835 | */ | |
836 | static u32 | |
837 | ks8695_get_msglevel(struct net_device *ndev) | |
838 | { | |
839 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
840 | ||
841 | return ksp->msg_enable; | |
842 | } | |
843 | ||
844 | /** | |
845 | * ks8695_set_msglevel - Set the messages enabled for emission | |
846 | * @ndev: The network device to configure | |
847 | * @value: The messages to set for emission | |
848 | */ | |
849 | static void | |
850 | ks8695_set_msglevel(struct net_device *ndev, u32 value) | |
851 | { | |
852 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
853 | ||
854 | ksp->msg_enable = value; | |
855 | } | |
856 | ||
857 | /** | |
c3d2a730 | 858 | * ks8695_wan_get_settings - Get device-specific settings. |
7a3c66e2 DS |
859 | * @ndev: The network device to read settings from |
860 | * @cmd: The ethtool structure to read into | |
861 | */ | |
862 | static int | |
c3d2a730 | 863 | ks8695_wan_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) |
7a3c66e2 DS |
864 | { |
865 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
866 | u32 ctrl; | |
867 | ||
868 | /* All ports on the KS8695 support these... */ | |
869 | cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
870 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
871 | SUPPORTED_TP | SUPPORTED_MII); | |
872 | cmd->transceiver = XCVR_INTERNAL; | |
873 | ||
c3d2a730 BH |
874 | cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; |
875 | cmd->port = PORT_MII; | |
876 | cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); | |
877 | cmd->phy_address = 0; | |
7a3c66e2 | 878 | |
c3d2a730 BH |
879 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
880 | if ((ctrl & WMC_WAND) == 0) { | |
881 | /* auto-negotiation is enabled */ | |
882 | cmd->advertising |= ADVERTISED_Autoneg; | |
883 | if (ctrl & WMC_WANA100F) | |
884 | cmd->advertising |= ADVERTISED_100baseT_Full; | |
885 | if (ctrl & WMC_WANA100H) | |
886 | cmd->advertising |= ADVERTISED_100baseT_Half; | |
887 | if (ctrl & WMC_WANA10F) | |
888 | cmd->advertising |= ADVERTISED_10baseT_Full; | |
889 | if (ctrl & WMC_WANA10H) | |
890 | cmd->advertising |= ADVERTISED_10baseT_Half; | |
891 | if (ctrl & WMC_WANAP) | |
892 | cmd->advertising |= ADVERTISED_Pause; | |
893 | cmd->autoneg = AUTONEG_ENABLE; | |
894 | ||
70739497 DD |
895 | ethtool_cmd_speed_set(cmd, |
896 | (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10); | |
c3d2a730 BH |
897 | cmd->duplex = (ctrl & WMC_WDS) ? |
898 | DUPLEX_FULL : DUPLEX_HALF; | |
899 | } else { | |
900 | /* auto-negotiation is disabled */ | |
901 | cmd->autoneg = AUTONEG_DISABLE; | |
7a3c66e2 | 902 | |
70739497 DD |
903 | ethtool_cmd_speed_set(cmd, ((ctrl & WMC_WANF100) ? |
904 | SPEED_100 : SPEED_10)); | |
c3d2a730 BH |
905 | cmd->duplex = (ctrl & WMC_WANFF) ? |
906 | DUPLEX_FULL : DUPLEX_HALF; | |
7a3c66e2 DS |
907 | } |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | /** | |
c3d2a730 | 913 | * ks8695_wan_set_settings - Set device-specific settings. |
7a3c66e2 DS |
914 | * @ndev: The network device to configure |
915 | * @cmd: The settings to configure | |
916 | */ | |
917 | static int | |
c3d2a730 | 918 | ks8695_wan_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) |
7a3c66e2 DS |
919 | { |
920 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
921 | u32 ctrl; | |
922 | ||
923 | if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) | |
924 | return -EINVAL; | |
925 | if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) | |
926 | return -EINVAL; | |
927 | if (cmd->port != PORT_MII) | |
928 | return -EINVAL; | |
929 | if (cmd->transceiver != XCVR_INTERNAL) | |
930 | return -EINVAL; | |
931 | if ((cmd->autoneg != AUTONEG_DISABLE) && | |
932 | (cmd->autoneg != AUTONEG_ENABLE)) | |
933 | return -EINVAL; | |
934 | ||
935 | if (cmd->autoneg == AUTONEG_ENABLE) { | |
936 | if ((cmd->advertising & (ADVERTISED_10baseT_Half | | |
937 | ADVERTISED_10baseT_Full | | |
938 | ADVERTISED_100baseT_Half | | |
939 | ADVERTISED_100baseT_Full)) == 0) | |
940 | return -EINVAL; | |
941 | ||
c3d2a730 | 942 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
7a3c66e2 | 943 | |
c3d2a730 BH |
944 | ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | |
945 | WMC_WANA10F | WMC_WANA10H); | |
946 | if (cmd->advertising & ADVERTISED_100baseT_Full) | |
947 | ctrl |= WMC_WANA100F; | |
948 | if (cmd->advertising & ADVERTISED_100baseT_Half) | |
949 | ctrl |= WMC_WANA100H; | |
950 | if (cmd->advertising & ADVERTISED_10baseT_Full) | |
951 | ctrl |= WMC_WANA10F; | |
952 | if (cmd->advertising & ADVERTISED_10baseT_Half) | |
953 | ctrl |= WMC_WANA10H; | |
954 | ||
955 | /* force a re-negotiation */ | |
956 | ctrl |= WMC_WANR; | |
957 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
7a3c66e2 | 958 | } else { |
c3d2a730 BH |
959 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
960 | ||
961 | /* disable auto-negotiation */ | |
962 | ctrl |= WMC_WAND; | |
963 | ctrl &= ~(WMC_WANF100 | WMC_WANFF); | |
964 | ||
965 | if (cmd->speed == SPEED_100) | |
966 | ctrl |= WMC_WANF100; | |
967 | if (cmd->duplex == DUPLEX_FULL) | |
968 | ctrl |= WMC_WANFF; | |
969 | ||
970 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
7a3c66e2 DS |
971 | } |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
976 | /** | |
c3d2a730 | 977 | * ks8695_wan_nwayreset - Restart the autonegotiation on the port. |
7a3c66e2 DS |
978 | * @ndev: The network device to restart autoneotiation on |
979 | */ | |
980 | static int | |
c3d2a730 | 981 | ks8695_wan_nwayreset(struct net_device *ndev) |
7a3c66e2 DS |
982 | { |
983 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
984 | u32 ctrl; | |
985 | ||
c3d2a730 | 986 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
7a3c66e2 | 987 | |
c3d2a730 BH |
988 | if ((ctrl & WMC_WAND) == 0) |
989 | writel(ctrl | WMC_WANR, | |
990 | ksp->phyiface_regs + KS8695_WMC); | |
991 | else | |
992 | /* auto-negotiation not enabled */ | |
993 | return -EINVAL; | |
7a3c66e2 DS |
994 | |
995 | return 0; | |
996 | } | |
997 | ||
7a3c66e2 | 998 | /** |
c3d2a730 | 999 | * ks8695_wan_get_pause - Retrieve network pause/flow-control advertising |
7a3c66e2 DS |
1000 | * @ndev: The device to retrieve settings from |
1001 | * @param: The structure to fill out with the information | |
1002 | */ | |
1003 | static void | |
c3d2a730 | 1004 | ks8695_wan_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) |
7a3c66e2 DS |
1005 | { |
1006 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1007 | u32 ctrl; | |
1008 | ||
c3d2a730 | 1009 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); |
7a3c66e2 | 1010 | |
c3d2a730 BH |
1011 | /* advertise Pause */ |
1012 | param->autoneg = (ctrl & WMC_WANAP); | |
7a3c66e2 | 1013 | |
c3d2a730 BH |
1014 | /* current Rx Flow-control */ |
1015 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1016 | param->rx_pause = (ctrl & DRXC_RFCE); | |
7a3c66e2 | 1017 | |
c3d2a730 BH |
1018 | /* current Tx Flow-control */ |
1019 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
1020 | param->tx_pause = (ctrl & DTXC_TFCE); | |
7a3c66e2 DS |
1021 | } |
1022 | ||
1023 | /** | |
1024 | * ks8695_get_drvinfo - Retrieve driver information | |
1025 | * @ndev: The network device to retrieve info about | |
1026 | * @info: The info structure to fill out. | |
1027 | */ | |
1028 | static void | |
1029 | ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) | |
1030 | { | |
1031 | strlcpy(info->driver, MODULENAME, sizeof(info->driver)); | |
1032 | strlcpy(info->version, MODULEVERSION, sizeof(info->version)); | |
c2313557 | 1033 | strlcpy(info->bus_info, dev_name(ndev->dev.parent), |
7a3c66e2 DS |
1034 | sizeof(info->bus_info)); |
1035 | } | |
1036 | ||
0fc0b732 | 1037 | static const struct ethtool_ops ks8695_ethtool_ops = { |
7a3c66e2 DS |
1038 | .get_msglevel = ks8695_get_msglevel, |
1039 | .set_msglevel = ks8695_set_msglevel, | |
c3d2a730 BH |
1040 | .get_drvinfo = ks8695_get_drvinfo, |
1041 | }; | |
1042 | ||
1043 | static const struct ethtool_ops ks8695_wan_ethtool_ops = { | |
1044 | .get_msglevel = ks8695_get_msglevel, | |
1045 | .set_msglevel = ks8695_set_msglevel, | |
1046 | .get_settings = ks8695_wan_get_settings, | |
1047 | .set_settings = ks8695_wan_set_settings, | |
1048 | .nway_reset = ks8695_wan_nwayreset, | |
5cd8a77d | 1049 | .get_link = ethtool_op_get_link, |
c3d2a730 | 1050 | .get_pauseparam = ks8695_wan_get_pause, |
7a3c66e2 DS |
1051 | .get_drvinfo = ks8695_get_drvinfo, |
1052 | }; | |
1053 | ||
1054 | /* Network device interface functions */ | |
1055 | ||
1056 | /** | |
1057 | * ks8695_set_mac - Update MAC in net dev and HW | |
1058 | * @ndev: The network device to update | |
1059 | * @addr: The new MAC address to set | |
1060 | */ | |
1061 | static int | |
1062 | ks8695_set_mac(struct net_device *ndev, void *addr) | |
1063 | { | |
1064 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1065 | struct sockaddr *address = addr; | |
1066 | ||
1067 | if (!is_valid_ether_addr(address->sa_data)) | |
1068 | return -EADDRNOTAVAIL; | |
1069 | ||
1070 | memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); | |
1071 | ||
1072 | ks8695_update_mac(ksp); | |
1073 | ||
1074 | dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", | |
1075 | ndev->name, ndev->dev_addr); | |
1076 | ||
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * ks8695_set_multicast - Set up the multicast behaviour of the interface | |
1082 | * @ndev: The net_device to configure | |
1083 | * | |
1084 | * This routine, called by the net layer, configures promiscuity | |
1085 | * and multicast reception behaviour for the interface. | |
1086 | */ | |
1087 | static void | |
1088 | ks8695_set_multicast(struct net_device *ndev) | |
1089 | { | |
1090 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1091 | u32 ctrl; | |
1092 | ||
1093 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1094 | ||
1095 | if (ndev->flags & IFF_PROMISC) { | |
1096 | /* enable promiscuous mode */ | |
1097 | ctrl |= DRXC_RA; | |
1098 | } else if (ndev->flags & ~IFF_PROMISC) { | |
1099 | /* disable promiscuous mode */ | |
1100 | ctrl &= ~DRXC_RA; | |
1101 | } | |
1102 | ||
1103 | if (ndev->flags & IFF_ALLMULTI) { | |
1104 | /* enable all multicast mode */ | |
1105 | ctrl |= DRXC_RM; | |
4cd24eaf | 1106 | } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) { |
7a3c66e2 DS |
1107 | /* more specific multicast addresses than can be |
1108 | * handled in hardware | |
1109 | */ | |
1110 | ctrl |= DRXC_RM; | |
1111 | } else { | |
1112 | /* enable specific multicasts */ | |
1113 | ctrl &= ~DRXC_RM; | |
3b9a7728 | 1114 | ks8695_init_partial_multicast(ksp, ndev); |
7a3c66e2 DS |
1115 | } |
1116 | ||
1117 | ks8695_writereg(ksp, KS8695_DRXC, ctrl); | |
1118 | } | |
1119 | ||
1120 | /** | |
1121 | * ks8695_timeout - Handle a network tx/rx timeout. | |
1122 | * @ndev: The net_device which timed out. | |
1123 | * | |
1124 | * A network transaction timed out, reset the device. | |
1125 | */ | |
1126 | static void | |
1127 | ks8695_timeout(struct net_device *ndev) | |
1128 | { | |
1129 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1130 | ||
1131 | netif_stop_queue(ndev); | |
1132 | ks8695_shutdown(ksp); | |
1133 | ||
1134 | ks8695_reset(ksp); | |
1135 | ||
1136 | ks8695_update_mac(ksp); | |
1137 | ||
1138 | /* We ignore the return from this since it managed to init | |
1139 | * before it probably will be okay to init again. | |
1140 | */ | |
1141 | ks8695_init_net(ksp); | |
1142 | ||
1143 | /* Reconfigure promiscuity etc */ | |
1144 | ks8695_set_multicast(ndev); | |
1145 | ||
1146 | /* And start the TX queue once more */ | |
1147 | netif_start_queue(ndev); | |
1148 | } | |
1149 | ||
1150 | /** | |
1151 | * ks8695_start_xmit - Start a packet transmission | |
1152 | * @skb: The packet to transmit | |
1153 | * @ndev: The network device to send the packet on | |
1154 | * | |
1155 | * This routine, called by the net layer, takes ownership of the | |
1156 | * sk_buff and adds it to the TX ring. It then kicks the TX DMA | |
1157 | * engine to ensure transmission begins. | |
1158 | */ | |
1159 | static int | |
1160 | ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1161 | { | |
1162 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1163 | int buff_n; | |
1164 | dma_addr_t dmap; | |
1165 | ||
1166 | spin_lock_irq(&ksp->txq_lock); | |
1167 | ||
1168 | if (ksp->tx_ring_used == MAX_TX_DESC) { | |
1169 | /* Somehow we got entered when we have no room */ | |
1170 | spin_unlock_irq(&ksp->txq_lock); | |
1171 | return NETDEV_TX_BUSY; | |
1172 | } | |
1173 | ||
1174 | buff_n = ksp->tx_ring_next_slot; | |
1175 | ||
1176 | BUG_ON(ksp->tx_buffers[buff_n].skb); | |
1177 | ||
1178 | dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); | |
1179 | if (unlikely(dma_mapping_error(ksp->dev, dmap))) { | |
1180 | /* Failed to DMA map this SKB, give it back for now */ | |
1181 | spin_unlock_irq(&ksp->txq_lock); | |
1182 | dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ | |
1183 | "transmission, trying later\n", ndev->name); | |
1184 | return NETDEV_TX_BUSY; | |
1185 | } | |
1186 | ||
1187 | ksp->tx_buffers[buff_n].dma_ptr = dmap; | |
1188 | /* Mapped okay, store the buffer pointer and length for later */ | |
1189 | ksp->tx_buffers[buff_n].skb = skb; | |
1190 | ksp->tx_buffers[buff_n].length = skb->len; | |
1191 | ||
1192 | /* Fill out the TX descriptor */ | |
1193 | ksp->tx_ring[buff_n].data_ptr = | |
1194 | cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); | |
1195 | ksp->tx_ring[buff_n].status = | |
1196 | cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | | |
1197 | (skb->len & TDES_TBS)); | |
1198 | ||
1199 | wmb(); | |
1200 | ||
1201 | /* Hand it over to the hardware */ | |
1202 | ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); | |
1203 | ||
1204 | if (++ksp->tx_ring_used == MAX_TX_DESC) | |
1205 | netif_stop_queue(ndev); | |
1206 | ||
7a3c66e2 DS |
1207 | /* Kick the TX DMA in case it decided to go IDLE */ |
1208 | ks8695_writereg(ksp, KS8695_DTSC, 0); | |
1209 | ||
1210 | /* And update the next ring slot */ | |
1211 | ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; | |
1212 | ||
1213 | spin_unlock_irq(&ksp->txq_lock); | |
1214 | return NETDEV_TX_OK; | |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface | |
1219 | * @ndev: The net_device to stop | |
1220 | * | |
1221 | * This disables the TX queue and cleans up a KS8695 ethernet | |
1222 | * device. | |
1223 | */ | |
1224 | static int | |
1225 | ks8695_stop(struct net_device *ndev) | |
1226 | { | |
1227 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1228 | ||
1229 | netif_stop_queue(ndev); | |
68d8287c | 1230 | napi_disable(&ksp->napi); |
7a3c66e2 DS |
1231 | |
1232 | ks8695_shutdown(ksp); | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | /** | |
1238 | * ks8695_open - Open (bring up) a KS8695 ethernet interface | |
1239 | * @ndev: The net_device to open | |
1240 | * | |
1241 | * This resets, configures the MAC, initialises the RX ring and | |
1242 | * DMA engines and starts the TX queue for a KS8695 ethernet | |
1243 | * device. | |
1244 | */ | |
1245 | static int | |
1246 | ks8695_open(struct net_device *ndev) | |
1247 | { | |
1248 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1249 | int ret; | |
1250 | ||
7a3c66e2 DS |
1251 | ks8695_reset(ksp); |
1252 | ||
1253 | ks8695_update_mac(ksp); | |
1254 | ||
1255 | ret = ks8695_init_net(ksp); | |
1256 | if (ret) { | |
1257 | ks8695_shutdown(ksp); | |
1258 | return ret; | |
1259 | } | |
1260 | ||
68d8287c | 1261 | napi_enable(&ksp->napi); |
7a3c66e2 DS |
1262 | netif_start_queue(ndev); |
1263 | ||
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | /* Platform device driver */ | |
1268 | ||
1269 | /** | |
1270 | * ks8695_init_switch - Init LAN switch to known good defaults. | |
1271 | * @ksp: The device to initialise | |
1272 | * | |
1273 | * This initialises the LAN switch in the KS8695 to a known-good | |
1274 | * set of defaults. | |
1275 | */ | |
654b8c5c | 1276 | static void |
7a3c66e2 DS |
1277 | ks8695_init_switch(struct ks8695_priv *ksp) |
1278 | { | |
1279 | u32 ctrl; | |
1280 | ||
1281 | /* Default value for SEC0 according to datasheet */ | |
1282 | ctrl = 0x40819e00; | |
1283 | ||
1284 | /* LED0 = Speed LED1 = Link/Activity */ | |
1285 | ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); | |
1286 | ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); | |
1287 | ||
1288 | /* Enable Switch */ | |
1289 | ctrl |= SEC0_ENABLE; | |
1290 | ||
1291 | writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); | |
1292 | ||
1293 | /* Defaults for SEC1 */ | |
1294 | writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); | |
1295 | } | |
1296 | ||
1297 | /** | |
1298 | * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults | |
1299 | * @ksp: The device to initialise | |
1300 | * | |
1301 | * This initialises a KS8695's WAN phy to sensible values for | |
1302 | * autonegotiation etc. | |
1303 | */ | |
654b8c5c | 1304 | static void |
7a3c66e2 DS |
1305 | ks8695_init_wan_phy(struct ks8695_priv *ksp) |
1306 | { | |
1307 | u32 ctrl; | |
1308 | ||
1309 | /* Support auto-negotiation */ | |
1310 | ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | | |
1311 | WMC_WANA10F | WMC_WANA10H); | |
1312 | ||
1313 | /* LED0 = Activity , LED1 = Link */ | |
1314 | ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); | |
1315 | ||
1316 | /* Restart Auto-negotiation */ | |
1317 | ctrl |= WMC_WANR; | |
1318 | ||
1319 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1320 | ||
1321 | writel(0, ksp->phyiface_regs + KS8695_WPPM); | |
1322 | writel(0, ksp->phyiface_regs + KS8695_PPS); | |
1323 | } | |
1324 | ||
1325 | static const struct net_device_ops ks8695_netdev_ops = { | |
1326 | .ndo_open = ks8695_open, | |
1327 | .ndo_stop = ks8695_stop, | |
1328 | .ndo_start_xmit = ks8695_start_xmit, | |
1329 | .ndo_tx_timeout = ks8695_timeout, | |
1330 | .ndo_set_mac_address = ks8695_set_mac, | |
52255bbe | 1331 | .ndo_validate_addr = eth_validate_addr, |
afc4b13d | 1332 | .ndo_set_rx_mode = ks8695_set_multicast, |
7a3c66e2 DS |
1333 | }; |
1334 | ||
1335 | /** | |
1336 | * ks8695_probe - Probe and initialise a KS8695 ethernet interface | |
1337 | * @pdev: The platform device to probe | |
1338 | * | |
1339 | * Initialise a KS8695 ethernet device from platform data. | |
1340 | * | |
1341 | * This driver requires at least one IORESOURCE_MEM for the | |
1342 | * registers and two IORESOURCE_IRQ for the RX and TX IRQs | |
1343 | * respectively. It can optionally take an additional | |
1344 | * IORESOURCE_MEM for the switch or phy in the case of the lan or | |
1345 | * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan | |
1346 | * port. | |
1347 | */ | |
654b8c5c | 1348 | static int |
7a3c66e2 DS |
1349 | ks8695_probe(struct platform_device *pdev) |
1350 | { | |
1351 | struct ks8695_priv *ksp; | |
1352 | struct net_device *ndev; | |
1353 | struct resource *regs_res, *phyiface_res; | |
1354 | struct resource *rxirq_res, *txirq_res, *linkirq_res; | |
1355 | int ret = 0; | |
1356 | int buff_n; | |
1357 | u32 machigh, maclow; | |
1358 | ||
1359 | /* Initialise a net_device */ | |
1360 | ndev = alloc_etherdev(sizeof(struct ks8695_priv)); | |
41de8d4c | 1361 | if (!ndev) |
7a3c66e2 | 1362 | return -ENOMEM; |
7a3c66e2 DS |
1363 | |
1364 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1365 | ||
1366 | dev_dbg(&pdev->dev, "ks8695_probe() called\n"); | |
1367 | ||
1368 | /* Configure our private structure a little */ | |
1369 | ksp = netdev_priv(ndev); | |
7a3c66e2 DS |
1370 | |
1371 | ksp->dev = &pdev->dev; | |
1372 | ksp->ndev = ndev; | |
1373 | ksp->msg_enable = NETIF_MSG_LINK; | |
1374 | ||
1375 | /* Retrieve resources */ | |
1376 | regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1377 | phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1378 | ||
1379 | rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1380 | txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); | |
1381 | linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); | |
1382 | ||
1383 | if (!(regs_res && rxirq_res && txirq_res)) { | |
1384 | dev_err(ksp->dev, "insufficient resources\n"); | |
1385 | ret = -ENOENT; | |
1386 | goto failure; | |
1387 | } | |
1388 | ||
1389 | ksp->regs_req = request_mem_region(regs_res->start, | |
1390 | resource_size(regs_res), | |
1391 | pdev->name); | |
1392 | ||
1393 | if (!ksp->regs_req) { | |
1394 | dev_err(ksp->dev, "cannot claim register space\n"); | |
1395 | ret = -EIO; | |
1396 | goto failure; | |
1397 | } | |
1398 | ||
1399 | ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); | |
1400 | ||
1401 | if (!ksp->io_regs) { | |
1402 | dev_err(ksp->dev, "failed to ioremap registers\n"); | |
1403 | ret = -EINVAL; | |
1404 | goto failure; | |
1405 | } | |
1406 | ||
1407 | if (phyiface_res) { | |
1408 | ksp->phyiface_req = | |
1409 | request_mem_region(phyiface_res->start, | |
1410 | resource_size(phyiface_res), | |
1411 | phyiface_res->name); | |
1412 | ||
1413 | if (!ksp->phyiface_req) { | |
1414 | dev_err(ksp->dev, | |
1415 | "cannot claim switch register space\n"); | |
1416 | ret = -EIO; | |
1417 | goto failure; | |
1418 | } | |
1419 | ||
1420 | ksp->phyiface_regs = ioremap(phyiface_res->start, | |
1421 | resource_size(phyiface_res)); | |
1422 | ||
1423 | if (!ksp->phyiface_regs) { | |
1424 | dev_err(ksp->dev, | |
1425 | "failed to ioremap switch registers\n"); | |
1426 | ret = -EINVAL; | |
1427 | goto failure; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | ksp->rx_irq = rxirq_res->start; | |
1432 | ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; | |
1433 | ksp->tx_irq = txirq_res->start; | |
1434 | ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; | |
1435 | ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); | |
1436 | ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? | |
1437 | linkirq_res->name : "Ethernet Link"; | |
1438 | ||
1439 | /* driver system setup */ | |
1440 | ndev->netdev_ops = &ks8695_netdev_ops; | |
7a3c66e2 DS |
1441 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); |
1442 | ||
68d8287c | 1443 | netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT); |
31b73ab3 | 1444 | |
7a3c66e2 DS |
1445 | /* Retrieve the default MAC addr from the chip. */ |
1446 | /* The bootloader should have left it in there for us. */ | |
1447 | ||
1448 | machigh = ks8695_readreg(ksp, KS8695_MAH); | |
1449 | maclow = ks8695_readreg(ksp, KS8695_MAL); | |
1450 | ||
1451 | ndev->dev_addr[0] = (machigh >> 8) & 0xFF; | |
1452 | ndev->dev_addr[1] = machigh & 0xFF; | |
1453 | ndev->dev_addr[2] = (maclow >> 24) & 0xFF; | |
1454 | ndev->dev_addr[3] = (maclow >> 16) & 0xFF; | |
1455 | ndev->dev_addr[4] = (maclow >> 8) & 0xFF; | |
1456 | ndev->dev_addr[5] = maclow & 0xFF; | |
1457 | ||
1458 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1459 | dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " | |
1460 | "set using ifconfig\n", ndev->name); | |
1461 | ||
1462 | /* In order to be efficient memory-wise, we allocate both | |
1463 | * rings in one go. | |
1464 | */ | |
1465 | ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, | |
1466 | &ksp->ring_base_dma, GFP_KERNEL); | |
1467 | if (!ksp->ring_base) { | |
1468 | ret = -ENOMEM; | |
1469 | goto failure; | |
1470 | } | |
1471 | ||
1472 | /* Specify the TX DMA ring buffer */ | |
1473 | ksp->tx_ring = ksp->ring_base; | |
1474 | ksp->tx_ring_dma = ksp->ring_base_dma; | |
1475 | ||
1476 | /* And initialise the queue's lock */ | |
1477 | spin_lock_init(&ksp->txq_lock); | |
31b73ab3 | 1478 | spin_lock_init(&ksp->rx_lock); |
7a3c66e2 DS |
1479 | |
1480 | /* Specify the RX DMA ring buffer */ | |
1481 | ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; | |
1482 | ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; | |
1483 | ||
1484 | /* Zero the descriptor rings */ | |
1485 | memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); | |
1486 | memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); | |
1487 | ||
1488 | /* Build the rings */ | |
1489 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
1490 | ksp->tx_ring[buff_n].next_desc = | |
1491 | cpu_to_le32(ksp->tx_ring_dma + | |
1492 | (sizeof(struct tx_ring_desc) * | |
1493 | ((buff_n + 1) & MAX_TX_DESC_MASK))); | |
1494 | } | |
1495 | ||
1496 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
1497 | ksp->rx_ring[buff_n].next_desc = | |
1498 | cpu_to_le32(ksp->rx_ring_dma + | |
1499 | (sizeof(struct rx_ring_desc) * | |
1500 | ((buff_n + 1) & MAX_RX_DESC_MASK))); | |
1501 | } | |
1502 | ||
1503 | /* Initialise the port (physically) */ | |
1504 | if (ksp->phyiface_regs && ksp->link_irq == -1) { | |
1505 | ks8695_init_switch(ksp); | |
1506 | ksp->dtype = KS8695_DTYPE_LAN; | |
7ad24ea4 | 1507 | ndev->ethtool_ops = &ks8695_ethtool_ops; |
7a3c66e2 DS |
1508 | } else if (ksp->phyiface_regs && ksp->link_irq != -1) { |
1509 | ks8695_init_wan_phy(ksp); | |
1510 | ksp->dtype = KS8695_DTYPE_WAN; | |
7ad24ea4 | 1511 | ndev->ethtool_ops = &ks8695_wan_ethtool_ops; |
7a3c66e2 DS |
1512 | } else { |
1513 | /* No initialisation since HPNA does not have a PHY */ | |
1514 | ksp->dtype = KS8695_DTYPE_HPNA; | |
7ad24ea4 | 1515 | ndev->ethtool_ops = &ks8695_ethtool_ops; |
7a3c66e2 DS |
1516 | } |
1517 | ||
1518 | /* And bring up the net_device with the net core */ | |
1519 | platform_set_drvdata(pdev, ndev); | |
1520 | ret = register_netdev(ndev); | |
1521 | ||
1522 | if (ret == 0) { | |
1523 | dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", | |
1524 | ks8695_port_type(ksp), ndev->dev_addr); | |
1525 | } else { | |
1526 | /* Report the failure to register the net_device */ | |
1527 | dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); | |
1528 | goto failure; | |
1529 | } | |
1530 | ||
1531 | /* All is well */ | |
1532 | return 0; | |
1533 | ||
1534 | /* Error exit path */ | |
1535 | failure: | |
1536 | ks8695_release_device(ksp); | |
1537 | free_netdev(ndev); | |
1538 | ||
1539 | return ret; | |
1540 | } | |
1541 | ||
1542 | /** | |
1543 | * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. | |
1544 | * @pdev: The device to suspend | |
1545 | * @state: The suspend state | |
1546 | * | |
1547 | * This routine detaches and shuts down a KS8695 ethernet device. | |
1548 | */ | |
1549 | static int | |
1550 | ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
1551 | { | |
1552 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1553 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1554 | ||
1555 | ksp->in_suspend = 1; | |
1556 | ||
1557 | if (netif_running(ndev)) { | |
1558 | netif_device_detach(ndev); | |
1559 | ks8695_shutdown(ksp); | |
1560 | } | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | /** | |
1566 | * ks8695_drv_resume - Resume a KS8695 ethernet platform device. | |
1567 | * @pdev: The device to resume | |
1568 | * | |
1569 | * This routine re-initialises and re-attaches a KS8695 ethernet | |
1570 | * device. | |
1571 | */ | |
1572 | static int | |
1573 | ks8695_drv_resume(struct platform_device *pdev) | |
1574 | { | |
1575 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1576 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1577 | ||
1578 | if (netif_running(ndev)) { | |
1579 | ks8695_reset(ksp); | |
1580 | ks8695_init_net(ksp); | |
1581 | ks8695_set_multicast(ndev); | |
1582 | netif_device_attach(ndev); | |
1583 | } | |
1584 | ||
1585 | ksp->in_suspend = 0; | |
1586 | ||
1587 | return 0; | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * ks8695_drv_remove - Remove a KS8695 net device on driver unload. | |
1592 | * @pdev: The platform device to remove | |
1593 | * | |
1594 | * This unregisters and releases a KS8695 ethernet device. | |
1595 | */ | |
654b8c5c | 1596 | static int |
7a3c66e2 DS |
1597 | ks8695_drv_remove(struct platform_device *pdev) |
1598 | { | |
1599 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1600 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1601 | ||
31b73ab3 | 1602 | netif_napi_del(&ksp->napi); |
7a3c66e2 DS |
1603 | |
1604 | unregister_netdev(ndev); | |
1605 | ks8695_release_device(ksp); | |
1606 | free_netdev(ndev); | |
1607 | ||
1608 | dev_dbg(&pdev->dev, "released and freed device\n"); | |
1609 | return 0; | |
1610 | } | |
1611 | ||
1612 | static struct platform_driver ks8695_driver = { | |
1613 | .driver = { | |
1614 | .name = MODULENAME, | |
7a3c66e2 DS |
1615 | }, |
1616 | .probe = ks8695_probe, | |
654b8c5c | 1617 | .remove = ks8695_drv_remove, |
7a3c66e2 DS |
1618 | .suspend = ks8695_drv_suspend, |
1619 | .resume = ks8695_drv_resume, | |
1620 | }; | |
1621 | ||
18e4a737 | 1622 | module_platform_driver(ks8695_driver); |
7a3c66e2 | 1623 | |
577d6a7c | 1624 | MODULE_AUTHOR("Simtec Electronics"); |
7a3c66e2 DS |
1625 | MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); |
1626 | MODULE_LICENSE("GPL"); | |
1627 | MODULE_ALIAS("platform:" MODULENAME); | |
1628 | ||
1629 | module_param(watchdog, int, 0400); | |
1630 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); |