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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 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/ioport.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/crc32.h> | |
27 | #include <linux/mii.h> | |
28 | #include <linux/ethtool.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/irq.h> | |
7a3c66e2 DS |
32 | #include <linux/io.h> |
33 | ||
34 | #include <asm/irq.h> | |
35 | ||
36 | #include <mach/regs-switch.h> | |
37 | #include <mach/regs-misc.h> | |
31b73ab3 F |
38 | #include <asm/mach/irq.h> |
39 | #include <mach/regs-irq.h> | |
7a3c66e2 DS |
40 | |
41 | #include "ks8695net.h" | |
42 | ||
43 | #define MODULENAME "ks8695_ether" | |
68d8287c | 44 | #define MODULEVERSION "1.02" |
31b73ab3 | 45 | |
7a3c66e2 DS |
46 | /* |
47 | * Transmit and device reset timeout, default 5 seconds. | |
48 | */ | |
49 | static int watchdog = 5000; | |
50 | ||
51 | /* Hardware structures */ | |
52 | ||
53 | /** | |
54 | * struct rx_ring_desc - Receive descriptor ring element | |
55 | * @status: The status of the descriptor element (E.g. who owns it) | |
56 | * @length: The number of bytes in the block pointed to by data_ptr | |
57 | * @data_ptr: The physical address of the data block to receive into | |
58 | * @next_desc: The physical address of the next descriptor element. | |
59 | */ | |
60 | struct rx_ring_desc { | |
61 | __le32 status; | |
62 | __le32 length; | |
63 | __le32 data_ptr; | |
64 | __le32 next_desc; | |
65 | }; | |
66 | ||
67 | /** | |
68 | * struct tx_ring_desc - Transmit descriptor ring element | |
69 | * @owner: Who owns the descriptor | |
70 | * @status: The number of bytes in the block pointed to by data_ptr | |
71 | * @data_ptr: The physical address of the data block to receive into | |
72 | * @next_desc: The physical address of the next descriptor element. | |
73 | */ | |
74 | struct tx_ring_desc { | |
75 | __le32 owner; | |
76 | __le32 status; | |
77 | __le32 data_ptr; | |
78 | __le32 next_desc; | |
79 | }; | |
80 | ||
81 | /** | |
82 | * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. | |
83 | * @skb: The buffer in the ring | |
84 | * @dma_ptr: The mapped DMA pointer of the buffer | |
85 | * @length: The number of bytes mapped to dma_ptr | |
86 | */ | |
87 | struct ks8695_skbuff { | |
88 | struct sk_buff *skb; | |
89 | dma_addr_t dma_ptr; | |
90 | u32 length; | |
91 | }; | |
92 | ||
93 | /* Private device structure */ | |
94 | ||
95 | #define MAX_TX_DESC 8 | |
96 | #define MAX_TX_DESC_MASK 0x7 | |
97 | #define MAX_RX_DESC 16 | |
98 | #define MAX_RX_DESC_MASK 0xf | |
99 | ||
68d8287c F |
100 | /*napi_weight have better more than rx DMA buffers*/ |
101 | #define NAPI_WEIGHT 64 | |
102 | ||
7a3c66e2 DS |
103 | #define MAX_RXBUF_SIZE 0x700 |
104 | ||
105 | #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) | |
106 | #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) | |
107 | #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) | |
108 | ||
109 | /** | |
110 | * enum ks8695_dtype - Device type | |
111 | * @KS8695_DTYPE_WAN: This device is a WAN interface | |
112 | * @KS8695_DTYPE_LAN: This device is a LAN interface | |
113 | * @KS8695_DTYPE_HPNA: This device is an HPNA interface | |
114 | */ | |
115 | enum ks8695_dtype { | |
116 | KS8695_DTYPE_WAN, | |
117 | KS8695_DTYPE_LAN, | |
118 | KS8695_DTYPE_HPNA, | |
119 | }; | |
120 | ||
121 | /** | |
122 | * struct ks8695_priv - Private data for the KS8695 Ethernet | |
123 | * @in_suspend: Flag to indicate if we're suspending/resuming | |
124 | * @ndev: The net_device for this interface | |
125 | * @dev: The platform device object for this interface | |
126 | * @dtype: The type of this device | |
127 | * @io_regs: The ioremapped registers for this interface | |
68d8287c | 128 | * @napi : Add support NAPI for Rx |
7a3c66e2 DS |
129 | * @rx_irq_name: The textual name of the RX IRQ from the platform data |
130 | * @tx_irq_name: The textual name of the TX IRQ from the platform data | |
131 | * @link_irq_name: The textual name of the link IRQ from the | |
132 | * platform data if available | |
133 | * @rx_irq: The IRQ number for the RX IRQ | |
134 | * @tx_irq: The IRQ number for the TX IRQ | |
135 | * @link_irq: The IRQ number for the link IRQ if available | |
136 | * @regs_req: The resource request for the registers region | |
137 | * @phyiface_req: The resource request for the phy/switch region | |
138 | * if available | |
139 | * @phyiface_regs: The ioremapped registers for the phy/switch if available | |
140 | * @ring_base: The base pointer of the dma coherent memory for the rings | |
141 | * @ring_base_dma: The DMA mapped equivalent of ring_base | |
142 | * @tx_ring: The pointer in ring_base of the TX ring | |
143 | * @tx_ring_used: The number of slots in the TX ring which are occupied | |
144 | * @tx_ring_next_slot: The next slot to fill in the TX ring | |
145 | * @tx_ring_dma: The DMA mapped equivalent of tx_ring | |
146 | * @tx_buffers: The sk_buff mappings for the TX ring | |
147 | * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables | |
148 | * @rx_ring: The pointer in ring_base of the RX ring | |
149 | * @rx_ring_dma: The DMA mapped equivalent of rx_ring | |
150 | * @rx_buffers: The sk_buff mappings for the RX ring | |
151 | * @next_rx_desc_read: The next RX descriptor to read from on IRQ | |
68d8287c | 152 | * @rx_lock: A lock to protect Rx irq function |
7a3c66e2 DS |
153 | * @msg_enable: The flags for which messages to emit |
154 | */ | |
155 | struct ks8695_priv { | |
156 | int in_suspend; | |
157 | struct net_device *ndev; | |
158 | struct device *dev; | |
159 | enum ks8695_dtype dtype; | |
160 | void __iomem *io_regs; | |
161 | ||
31b73ab3 F |
162 | struct napi_struct napi; |
163 | ||
7a3c66e2 DS |
164 | const char *rx_irq_name, *tx_irq_name, *link_irq_name; |
165 | int rx_irq, tx_irq, link_irq; | |
166 | ||
167 | struct resource *regs_req, *phyiface_req; | |
168 | void __iomem *phyiface_regs; | |
169 | ||
170 | void *ring_base; | |
171 | dma_addr_t ring_base_dma; | |
172 | ||
173 | struct tx_ring_desc *tx_ring; | |
174 | int tx_ring_used; | |
175 | int tx_ring_next_slot; | |
176 | dma_addr_t tx_ring_dma; | |
177 | struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; | |
178 | spinlock_t txq_lock; | |
179 | ||
180 | struct rx_ring_desc *rx_ring; | |
181 | dma_addr_t rx_ring_dma; | |
182 | struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; | |
183 | int next_rx_desc_read; | |
31b73ab3 | 184 | spinlock_t rx_lock; |
7a3c66e2 DS |
185 | |
186 | int msg_enable; | |
187 | }; | |
188 | ||
189 | /* Register access */ | |
190 | ||
191 | /** | |
192 | * ks8695_readreg - Read from a KS8695 ethernet register | |
193 | * @ksp: The device to read from | |
194 | * @reg: The register to read | |
195 | */ | |
196 | static inline u32 | |
197 | ks8695_readreg(struct ks8695_priv *ksp, int reg) | |
198 | { | |
199 | return readl(ksp->io_regs + reg); | |
200 | } | |
201 | ||
202 | /** | |
203 | * ks8695_writereg - Write to a KS8695 ethernet register | |
204 | * @ksp: The device to write to | |
205 | * @reg: The register to write | |
206 | * @value: The value to write to the register | |
207 | */ | |
208 | static inline void | |
209 | ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) | |
210 | { | |
211 | writel(value, ksp->io_regs + reg); | |
212 | } | |
213 | ||
214 | /* Utility functions */ | |
215 | ||
216 | /** | |
217 | * ks8695_port_type - Retrieve port-type as user-friendly string | |
218 | * @ksp: The device to return the type for | |
219 | * | |
220 | * Returns a string indicating which of the WAN, LAN or HPNA | |
221 | * ports this device is likely to represent. | |
222 | */ | |
223 | static const char * | |
224 | ks8695_port_type(struct ks8695_priv *ksp) | |
225 | { | |
226 | switch (ksp->dtype) { | |
227 | case KS8695_DTYPE_LAN: | |
228 | return "LAN"; | |
229 | case KS8695_DTYPE_WAN: | |
230 | return "WAN"; | |
231 | case KS8695_DTYPE_HPNA: | |
232 | return "HPNA"; | |
233 | } | |
234 | ||
235 | return "UNKNOWN"; | |
236 | } | |
237 | ||
238 | /** | |
239 | * ks8695_update_mac - Update the MAC registers in the device | |
240 | * @ksp: The device to update | |
241 | * | |
242 | * Updates the MAC registers in the KS8695 device from the address in the | |
243 | * net_device structure associated with this interface. | |
244 | */ | |
245 | static void | |
246 | ks8695_update_mac(struct ks8695_priv *ksp) | |
247 | { | |
248 | /* Update the HW with the MAC from the net_device */ | |
249 | struct net_device *ndev = ksp->ndev; | |
250 | u32 machigh, maclow; | |
251 | ||
252 | maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | | |
253 | (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); | |
254 | machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); | |
255 | ||
256 | ks8695_writereg(ksp, KS8695_MAL, maclow); | |
257 | ks8695_writereg(ksp, KS8695_MAH, machigh); | |
258 | ||
259 | } | |
260 | ||
261 | /** | |
262 | * ks8695_refill_rxbuffers - Re-fill the RX buffer ring | |
263 | * @ksp: The device to refill | |
264 | * | |
265 | * Iterates the RX ring of the device looking for empty slots. | |
266 | * For each empty slot, we allocate and map a new SKB and give it | |
267 | * to the hardware. | |
268 | * This can be called from interrupt context safely. | |
269 | */ | |
270 | static void | |
271 | ks8695_refill_rxbuffers(struct ks8695_priv *ksp) | |
272 | { | |
273 | /* Run around the RX ring, filling in any missing sk_buff's */ | |
274 | int buff_n; | |
275 | ||
276 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
277 | if (!ksp->rx_buffers[buff_n].skb) { | |
278 | struct sk_buff *skb = dev_alloc_skb(MAX_RXBUF_SIZE); | |
279 | dma_addr_t mapping; | |
280 | ||
281 | ksp->rx_buffers[buff_n].skb = skb; | |
282 | if (skb == NULL) { | |
283 | /* Failed to allocate one, perhaps | |
284 | * we'll try again later. | |
285 | */ | |
286 | break; | |
287 | } | |
288 | ||
289 | mapping = dma_map_single(ksp->dev, skb->data, | |
290 | MAX_RXBUF_SIZE, | |
291 | DMA_FROM_DEVICE); | |
292 | if (unlikely(dma_mapping_error(ksp->dev, mapping))) { | |
293 | /* Failed to DMA map this SKB, try later */ | |
294 | dev_kfree_skb_irq(skb); | |
295 | ksp->rx_buffers[buff_n].skb = NULL; | |
296 | break; | |
297 | } | |
298 | ksp->rx_buffers[buff_n].dma_ptr = mapping; | |
299 | skb->dev = ksp->ndev; | |
300 | ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; | |
301 | ||
302 | /* Record this into the DMA ring */ | |
303 | ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); | |
304 | ksp->rx_ring[buff_n].length = | |
305 | cpu_to_le32(MAX_RXBUF_SIZE); | |
306 | ||
307 | wmb(); | |
308 | ||
309 | /* And give ownership over to the hardware */ | |
310 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | /* Maximum number of multicast addresses which the KS8695 HW supports */ | |
316 | #define KS8695_NR_ADDRESSES 16 | |
317 | ||
318 | /** | |
319 | * ks8695_init_partial_multicast - Init the mcast addr registers | |
320 | * @ksp: The device to initialise | |
321 | * @addr: The multicast address list to use | |
322 | * @nr_addr: The number of addresses in the list | |
323 | * | |
324 | * This routine is a helper for ks8695_set_multicast - it writes | |
325 | * the additional-address registers in the KS8695 ethernet device | |
326 | * and cleans up any others left behind. | |
327 | */ | |
328 | static void | |
329 | ks8695_init_partial_multicast(struct ks8695_priv *ksp, | |
330 | struct dev_mc_list *addr, | |
331 | int nr_addr) | |
332 | { | |
333 | u32 low, high; | |
334 | int i; | |
335 | ||
336 | for (i = 0; i < nr_addr; i++, addr = addr->next) { | |
337 | /* Ran out of addresses? */ | |
338 | if (!addr) | |
339 | break; | |
340 | /* Ran out of space in chip? */ | |
341 | BUG_ON(i == KS8695_NR_ADDRESSES); | |
342 | ||
343 | low = (addr->dmi_addr[2] << 24) | (addr->dmi_addr[3] << 16) | | |
344 | (addr->dmi_addr[4] << 8) | (addr->dmi_addr[5]); | |
345 | high = (addr->dmi_addr[0] << 8) | (addr->dmi_addr[1]); | |
346 | ||
347 | ks8695_writereg(ksp, KS8695_AAL_(i), low); | |
348 | ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); | |
349 | } | |
350 | ||
351 | /* Clear the remaining Additional Station Addresses */ | |
352 | for (; i < KS8695_NR_ADDRESSES; i++) { | |
353 | ks8695_writereg(ksp, KS8695_AAL_(i), 0); | |
354 | ks8695_writereg(ksp, KS8695_AAH_(i), 0); | |
355 | } | |
356 | } | |
357 | ||
358 | /* Interrupt handling */ | |
359 | ||
360 | /** | |
361 | * ks8695_tx_irq - Transmit IRQ handler | |
362 | * @irq: The IRQ which went off (ignored) | |
363 | * @dev_id: The net_device for the interrupt | |
364 | * | |
365 | * Process the TX ring, clearing out any transmitted slots. | |
366 | * Allows the net_device to pass us new packets once slots are | |
367 | * freed. | |
368 | */ | |
369 | static irqreturn_t | |
370 | ks8695_tx_irq(int irq, void *dev_id) | |
371 | { | |
372 | struct net_device *ndev = (struct net_device *)dev_id; | |
373 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
374 | int buff_n; | |
375 | ||
376 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
377 | if (ksp->tx_buffers[buff_n].skb && | |
378 | !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) { | |
379 | rmb(); | |
380 | /* An SKB which is not owned by HW is present */ | |
381 | /* Update the stats for the net_device */ | |
382 | ndev->stats.tx_packets++; | |
383 | ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length; | |
384 | ||
385 | /* Free the packet from the ring */ | |
386 | ksp->tx_ring[buff_n].data_ptr = 0; | |
387 | ||
388 | /* Free the sk_buff */ | |
389 | dma_unmap_single(ksp->dev, | |
390 | ksp->tx_buffers[buff_n].dma_ptr, | |
391 | ksp->tx_buffers[buff_n].length, | |
392 | DMA_TO_DEVICE); | |
393 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
394 | ksp->tx_buffers[buff_n].skb = NULL; | |
395 | ksp->tx_ring_used--; | |
396 | } | |
397 | } | |
398 | ||
399 | netif_wake_queue(ndev); | |
400 | ||
401 | return IRQ_HANDLED; | |
402 | } | |
403 | ||
68d8287c F |
404 | /** |
405 | * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit | |
406 | * @ksp: Private data for the KS8695 Ethernet | |
407 | * | |
408 | * For KS8695 document: | |
409 | * Interrupt Enable Register (offset 0xE204) | |
410 | * Bit29 : WAN MAC Receive Interrupt Enable | |
411 | * Bit16 : LAN MAC Receive Interrupt Enable | |
412 | * Interrupt Status Register (Offset 0xF208) | |
413 | * Bit29: WAN MAC Receive Status | |
414 | * Bit16: LAN MAC Receive Status | |
415 | * So, this Rx interrrupt enable/status bit number is equal | |
416 | * as Rx IRQ number. | |
417 | */ | |
418 | static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp) | |
419 | { | |
420 | return ksp->rx_irq; | |
421 | } | |
422 | ||
7a3c66e2 DS |
423 | /** |
424 | * ks8695_rx_irq - Receive IRQ handler | |
425 | * @irq: The IRQ which went off (ignored) | |
426 | * @dev_id: The net_device for the interrupt | |
427 | * | |
68d8287c | 428 | * Inform NAPI that packet reception needs to be scheduled |
7a3c66e2 | 429 | */ |
31b73ab3 | 430 | |
7a3c66e2 DS |
431 | static irqreturn_t |
432 | ks8695_rx_irq(int irq, void *dev_id) | |
433 | { | |
434 | struct net_device *ndev = (struct net_device *)dev_id; | |
31b73ab3 | 435 | struct ks8695_priv *ksp = netdev_priv(ndev); |
31b73ab3 F |
436 | |
437 | spin_lock(&ksp->rx_lock); | |
438 | ||
fa6cae14 | 439 | if (napi_schedule_prep(&ksp->napi)) { |
440 | unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN); | |
441 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
442 | /*disable rx interrupt*/ | |
443 | status &= ~mask_bit; | |
444 | writel(status , KS8695_IRQ_VA + KS8695_INTEN); | |
445 | __napi_schedule(&ksp->napi); | |
31b73ab3 F |
446 | } |
447 | ||
448 | spin_unlock(&ksp->rx_lock); | |
449 | return IRQ_HANDLED; | |
450 | } | |
451 | ||
68d8287c F |
452 | /** |
453 | * ks8695_rx - Receive packets called by NAPI poll method | |
454 | * @ksp: Private data for the KS8695 Ethernet | |
455 | * @budget: The max packets would be receive | |
456 | */ | |
457 | ||
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; | |
465 | int last_rx_processed = -1; | |
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); | |
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++; |
7a3c66e2 DS |
537 | /* And note this as processed so we can start |
538 | * from here next time | |
539 | */ | |
540 | last_rx_processed = buff_n; | |
31b73ab3 F |
541 | buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; |
542 | /*And note which RX descriptor we last did */ | |
543 | if (likely(last_rx_processed != -1)) | |
544 | ksp->next_rx_desc_read = | |
545 | (last_rx_processed + 1) & | |
546 | MAX_RX_DESC_MASK; | |
31b73ab3 | 547 | } |
5c427ff9 | 548 | /* And refill the buffers */ |
549 | ks8695_refill_rxbuffers(ksp); | |
550 | ||
551 | /* Kick the RX DMA engine, in case it became | |
552 | * suspended */ | |
553 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
31b73ab3 F |
554 | return received; |
555 | } | |
7a3c66e2 | 556 | |
68d8287c F |
557 | |
558 | /** | |
559 | * ks8695_poll - Receive packet by NAPI poll method | |
560 | * @ksp: Private data for the KS8695 Ethernet | |
561 | * @budget: The remaining number packets for network subsystem | |
562 | * | |
563 | * Invoked by the network core when it requests for new | |
564 | * packets from the driver | |
565 | */ | |
31b73ab3 F |
566 | static int ks8695_poll(struct napi_struct *napi, int budget) |
567 | { | |
568 | struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi); | |
68d8287c | 569 | unsigned long work_done; |
31b73ab3 | 570 | |
68d8287c F |
571 | unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN); |
572 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
31b73ab3 | 573 | |
68d8287c | 574 | work_done = ks8695_rx(ksp, budget); |
31b73ab3 F |
575 | |
576 | if (work_done < budget) { | |
577 | unsigned long flags; | |
578 | spin_lock_irqsave(&ksp->rx_lock, flags); | |
579 | /*enable rx interrupt*/ | |
580 | writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN); | |
581 | __napi_complete(napi); | |
582 | spin_unlock_irqrestore(&ksp->rx_lock, flags); | |
583 | } | |
584 | return work_done; | |
7a3c66e2 DS |
585 | } |
586 | ||
587 | /** | |
588 | * ks8695_link_irq - Link change IRQ handler | |
589 | * @irq: The IRQ which went off (ignored) | |
590 | * @dev_id: The net_device for the interrupt | |
591 | * | |
592 | * The WAN interface can generate an IRQ when the link changes, | |
593 | * report this to the net layer and the user. | |
594 | */ | |
595 | static irqreturn_t | |
596 | ks8695_link_irq(int irq, void *dev_id) | |
597 | { | |
598 | struct net_device *ndev = (struct net_device *)dev_id; | |
599 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
600 | u32 ctrl; | |
601 | ||
602 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
603 | if (ctrl & WMC_WLS) { | |
604 | netif_carrier_on(ndev); | |
605 | if (netif_msg_link(ksp)) | |
606 | dev_info(ksp->dev, | |
607 | "%s: Link is now up (10%sMbps/%s-duplex)\n", | |
608 | ndev->name, | |
609 | (ctrl & WMC_WSS) ? "0" : "", | |
610 | (ctrl & WMC_WDS) ? "Full" : "Half"); | |
611 | } else { | |
612 | netif_carrier_off(ndev); | |
613 | if (netif_msg_link(ksp)) | |
614 | dev_info(ksp->dev, "%s: Link is now down.\n", | |
615 | ndev->name); | |
616 | } | |
617 | ||
618 | return IRQ_HANDLED; | |
619 | } | |
620 | ||
621 | ||
622 | /* KS8695 Device functions */ | |
623 | ||
624 | /** | |
625 | * ks8695_reset - Reset a KS8695 ethernet interface | |
626 | * @ksp: The interface to reset | |
627 | * | |
628 | * Perform an engine reset of the interface and re-program it | |
629 | * with sensible defaults. | |
630 | */ | |
631 | static void | |
632 | ks8695_reset(struct ks8695_priv *ksp) | |
633 | { | |
634 | int reset_timeout = watchdog; | |
635 | /* Issue the reset via the TX DMA control register */ | |
636 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); | |
637 | while (reset_timeout--) { | |
638 | if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) | |
639 | break; | |
640 | msleep(1); | |
641 | } | |
642 | ||
858b9ced | 643 | if (reset_timeout < 0) { |
7a3c66e2 DS |
644 | dev_crit(ksp->dev, |
645 | "Timeout waiting for DMA engines to reset\n"); | |
646 | /* And blithely carry on */ | |
647 | } | |
648 | ||
649 | /* Definitely wait long enough before attempting to program | |
650 | * the engines | |
651 | */ | |
652 | msleep(10); | |
653 | ||
654 | /* RX: unicast and broadcast */ | |
655 | ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); | |
656 | /* TX: pad and add CRC */ | |
657 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); | |
658 | } | |
659 | ||
660 | /** | |
661 | * ks8695_shutdown - Shut down a KS8695 ethernet interface | |
662 | * @ksp: The interface to shut down | |
663 | * | |
664 | * This disables packet RX/TX, cleans up IRQs, drains the rings, | |
665 | * and basically places the interface into a clean shutdown | |
666 | * state. | |
667 | */ | |
668 | static void | |
669 | ks8695_shutdown(struct ks8695_priv *ksp) | |
670 | { | |
671 | u32 ctrl; | |
672 | int buff_n; | |
673 | ||
674 | /* Disable packet transmission */ | |
675 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
676 | ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); | |
677 | ||
678 | /* Disable packet reception */ | |
679 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
680 | ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); | |
681 | ||
682 | /* Release the IRQs */ | |
683 | free_irq(ksp->rx_irq, ksp->ndev); | |
684 | free_irq(ksp->tx_irq, ksp->ndev); | |
685 | if (ksp->link_irq != -1) | |
686 | free_irq(ksp->link_irq, ksp->ndev); | |
687 | ||
688 | /* Throw away any pending TX packets */ | |
689 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
690 | if (ksp->tx_buffers[buff_n].skb) { | |
691 | /* Remove this SKB from the TX ring */ | |
692 | ksp->tx_ring[buff_n].owner = 0; | |
693 | ksp->tx_ring[buff_n].status = 0; | |
694 | ksp->tx_ring[buff_n].data_ptr = 0; | |
695 | ||
696 | /* Unmap and bin this SKB */ | |
697 | dma_unmap_single(ksp->dev, | |
698 | ksp->tx_buffers[buff_n].dma_ptr, | |
699 | ksp->tx_buffers[buff_n].length, | |
700 | DMA_TO_DEVICE); | |
701 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
702 | ksp->tx_buffers[buff_n].skb = NULL; | |
703 | } | |
704 | } | |
705 | ||
706 | /* Purge the RX buffers */ | |
707 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
708 | if (ksp->rx_buffers[buff_n].skb) { | |
709 | /* Remove the SKB from the RX ring */ | |
710 | ksp->rx_ring[buff_n].status = 0; | |
711 | ksp->rx_ring[buff_n].data_ptr = 0; | |
712 | ||
713 | /* Unmap and bin the SKB */ | |
714 | dma_unmap_single(ksp->dev, | |
715 | ksp->rx_buffers[buff_n].dma_ptr, | |
716 | ksp->rx_buffers[buff_n].length, | |
717 | DMA_FROM_DEVICE); | |
718 | dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); | |
719 | ksp->rx_buffers[buff_n].skb = NULL; | |
720 | } | |
721 | } | |
722 | } | |
723 | ||
724 | ||
725 | /** | |
726 | * ks8695_setup_irq - IRQ setup helper function | |
727 | * @irq: The IRQ number to claim | |
728 | * @irq_name: The name to give the IRQ claimant | |
729 | * @handler: The function to call to handle the IRQ | |
730 | * @ndev: The net_device to pass in as the dev_id argument to the handler | |
731 | * | |
732 | * Return 0 on success. | |
733 | */ | |
734 | static int | |
735 | ks8695_setup_irq(int irq, const char *irq_name, | |
736 | irq_handler_t handler, struct net_device *ndev) | |
737 | { | |
738 | int ret; | |
739 | ||
740 | ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); | |
741 | ||
742 | if (ret) { | |
743 | dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); | |
744 | return ret; | |
745 | } | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | /** | |
751 | * ks8695_init_net - Initialise a KS8695 ethernet interface | |
752 | * @ksp: The interface to initialise | |
753 | * | |
754 | * This routine fills the RX ring, initialises the DMA engines, | |
755 | * allocates the IRQs and then starts the packet TX and RX | |
756 | * engines. | |
757 | */ | |
758 | static int | |
759 | ks8695_init_net(struct ks8695_priv *ksp) | |
760 | { | |
761 | int ret; | |
762 | u32 ctrl; | |
763 | ||
764 | ks8695_refill_rxbuffers(ksp); | |
765 | ||
766 | /* Initialise the DMA engines */ | |
767 | ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); | |
768 | ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); | |
769 | ||
770 | /* Request the IRQs */ | |
771 | ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, | |
772 | ks8695_rx_irq, ksp->ndev); | |
773 | if (ret) | |
774 | return ret; | |
775 | ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, | |
776 | ks8695_tx_irq, ksp->ndev); | |
777 | if (ret) | |
778 | return ret; | |
779 | if (ksp->link_irq != -1) { | |
780 | ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, | |
781 | ks8695_link_irq, ksp->ndev); | |
782 | if (ret) | |
783 | return ret; | |
784 | } | |
785 | ||
786 | /* Set up the ring indices */ | |
787 | ksp->next_rx_desc_read = 0; | |
788 | ksp->tx_ring_next_slot = 0; | |
789 | ksp->tx_ring_used = 0; | |
790 | ||
791 | /* Bring up transmission */ | |
792 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
793 | /* Enable packet transmission */ | |
794 | ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); | |
795 | ||
796 | /* Bring up the reception */ | |
797 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
798 | /* Enable packet reception */ | |
799 | ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); | |
800 | /* And start the DMA engine */ | |
801 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
802 | ||
803 | /* All done */ | |
804 | return 0; | |
805 | } | |
806 | ||
807 | /** | |
808 | * ks8695_release_device - HW resource release for KS8695 e-net | |
809 | * @ksp: The device to be freed | |
810 | * | |
811 | * This unallocates io memory regions, dma-coherent regions etc | |
812 | * which were allocated in ks8695_probe. | |
813 | */ | |
814 | static void | |
815 | ks8695_release_device(struct ks8695_priv *ksp) | |
816 | { | |
817 | /* Unmap the registers */ | |
818 | iounmap(ksp->io_regs); | |
819 | if (ksp->phyiface_regs) | |
820 | iounmap(ksp->phyiface_regs); | |
821 | ||
822 | /* And release the request */ | |
823 | release_resource(ksp->regs_req); | |
824 | kfree(ksp->regs_req); | |
825 | if (ksp->phyiface_req) { | |
826 | release_resource(ksp->phyiface_req); | |
827 | kfree(ksp->phyiface_req); | |
828 | } | |
829 | ||
830 | /* Free the ring buffers */ | |
831 | dma_free_coherent(ksp->dev, RING_DMA_SIZE, | |
832 | ksp->ring_base, ksp->ring_base_dma); | |
833 | } | |
834 | ||
835 | /* Ethtool support */ | |
836 | ||
837 | /** | |
838 | * ks8695_get_msglevel - Get the messages enabled for emission | |
839 | * @ndev: The network device to read from | |
840 | */ | |
841 | static u32 | |
842 | ks8695_get_msglevel(struct net_device *ndev) | |
843 | { | |
844 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
845 | ||
846 | return ksp->msg_enable; | |
847 | } | |
848 | ||
849 | /** | |
850 | * ks8695_set_msglevel - Set the messages enabled for emission | |
851 | * @ndev: The network device to configure | |
852 | * @value: The messages to set for emission | |
853 | */ | |
854 | static void | |
855 | ks8695_set_msglevel(struct net_device *ndev, u32 value) | |
856 | { | |
857 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
858 | ||
859 | ksp->msg_enable = value; | |
860 | } | |
861 | ||
862 | /** | |
863 | * ks8695_get_settings - Get device-specific settings. | |
864 | * @ndev: The network device to read settings from | |
865 | * @cmd: The ethtool structure to read into | |
866 | */ | |
867 | static int | |
868 | ks8695_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) | |
869 | { | |
870 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
871 | u32 ctrl; | |
872 | ||
873 | /* All ports on the KS8695 support these... */ | |
874 | cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
875 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
876 | SUPPORTED_TP | SUPPORTED_MII); | |
877 | cmd->transceiver = XCVR_INTERNAL; | |
878 | ||
879 | /* Port specific extras */ | |
880 | switch (ksp->dtype) { | |
881 | case KS8695_DTYPE_HPNA: | |
882 | cmd->phy_address = 0; | |
883 | /* not supported for HPNA */ | |
884 | cmd->autoneg = AUTONEG_DISABLE; | |
885 | ||
886 | /* BUG: Erm, dtype hpna implies no phy regs */ | |
887 | /* | |
888 | ctrl = readl(KS8695_MISC_VA + KS8695_HMC); | |
889 | cmd->speed = (ctrl & HMC_HSS) ? SPEED_100 : SPEED_10; | |
890 | cmd->duplex = (ctrl & HMC_HDS) ? DUPLEX_FULL : DUPLEX_HALF; | |
891 | */ | |
892 | return -EOPNOTSUPP; | |
893 | case KS8695_DTYPE_WAN: | |
894 | cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; | |
895 | cmd->port = PORT_MII; | |
896 | cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); | |
897 | cmd->phy_address = 0; | |
898 | ||
899 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
900 | if ((ctrl & WMC_WAND) == 0) { | |
901 | /* auto-negotiation is enabled */ | |
902 | cmd->advertising |= ADVERTISED_Autoneg; | |
903 | if (ctrl & WMC_WANA100F) | |
904 | cmd->advertising |= ADVERTISED_100baseT_Full; | |
905 | if (ctrl & WMC_WANA100H) | |
906 | cmd->advertising |= ADVERTISED_100baseT_Half; | |
907 | if (ctrl & WMC_WANA10F) | |
908 | cmd->advertising |= ADVERTISED_10baseT_Full; | |
909 | if (ctrl & WMC_WANA10H) | |
910 | cmd->advertising |= ADVERTISED_10baseT_Half; | |
911 | if (ctrl & WMC_WANAP) | |
912 | cmd->advertising |= ADVERTISED_Pause; | |
913 | cmd->autoneg = AUTONEG_ENABLE; | |
914 | ||
915 | cmd->speed = (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10; | |
916 | cmd->duplex = (ctrl & WMC_WDS) ? | |
917 | DUPLEX_FULL : DUPLEX_HALF; | |
918 | } else { | |
919 | /* auto-negotiation is disabled */ | |
920 | cmd->autoneg = AUTONEG_DISABLE; | |
921 | ||
922 | cmd->speed = (ctrl & WMC_WANF100) ? | |
923 | SPEED_100 : SPEED_10; | |
924 | cmd->duplex = (ctrl & WMC_WANFF) ? | |
925 | DUPLEX_FULL : DUPLEX_HALF; | |
926 | } | |
927 | break; | |
928 | case KS8695_DTYPE_LAN: | |
929 | return -EOPNOTSUPP; | |
930 | } | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
935 | /** | |
936 | * ks8695_set_settings - Set device-specific settings. | |
937 | * @ndev: The network device to configure | |
938 | * @cmd: The settings to configure | |
939 | */ | |
940 | static int | |
941 | ks8695_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) | |
942 | { | |
943 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
944 | u32 ctrl; | |
945 | ||
946 | if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) | |
947 | return -EINVAL; | |
948 | if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) | |
949 | return -EINVAL; | |
950 | if (cmd->port != PORT_MII) | |
951 | return -EINVAL; | |
952 | if (cmd->transceiver != XCVR_INTERNAL) | |
953 | return -EINVAL; | |
954 | if ((cmd->autoneg != AUTONEG_DISABLE) && | |
955 | (cmd->autoneg != AUTONEG_ENABLE)) | |
956 | return -EINVAL; | |
957 | ||
958 | if (cmd->autoneg == AUTONEG_ENABLE) { | |
959 | if ((cmd->advertising & (ADVERTISED_10baseT_Half | | |
960 | ADVERTISED_10baseT_Full | | |
961 | ADVERTISED_100baseT_Half | | |
962 | ADVERTISED_100baseT_Full)) == 0) | |
963 | return -EINVAL; | |
964 | ||
965 | switch (ksp->dtype) { | |
966 | case KS8695_DTYPE_HPNA: | |
967 | /* HPNA does not support auto-negotiation. */ | |
968 | return -EINVAL; | |
969 | case KS8695_DTYPE_WAN: | |
970 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
971 | ||
972 | ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | | |
973 | WMC_WANA10F | WMC_WANA10H); | |
974 | if (cmd->advertising & ADVERTISED_100baseT_Full) | |
975 | ctrl |= WMC_WANA100F; | |
976 | if (cmd->advertising & ADVERTISED_100baseT_Half) | |
977 | ctrl |= WMC_WANA100H; | |
978 | if (cmd->advertising & ADVERTISED_10baseT_Full) | |
979 | ctrl |= WMC_WANA10F; | |
980 | if (cmd->advertising & ADVERTISED_10baseT_Half) | |
981 | ctrl |= WMC_WANA10H; | |
982 | ||
983 | /* force a re-negotiation */ | |
984 | ctrl |= WMC_WANR; | |
985 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
986 | break; | |
987 | case KS8695_DTYPE_LAN: | |
988 | return -EOPNOTSUPP; | |
989 | } | |
990 | ||
991 | } else { | |
992 | switch (ksp->dtype) { | |
993 | case KS8695_DTYPE_HPNA: | |
994 | /* BUG: dtype_hpna implies no phy registers */ | |
995 | /* | |
996 | ctrl = __raw_readl(KS8695_MISC_VA + KS8695_HMC); | |
997 | ||
998 | ctrl &= ~(HMC_HSS | HMC_HDS); | |
999 | if (cmd->speed == SPEED_100) | |
1000 | ctrl |= HMC_HSS; | |
1001 | if (cmd->duplex == DUPLEX_FULL) | |
1002 | ctrl |= HMC_HDS; | |
1003 | ||
1004 | __raw_writel(ctrl, KS8695_MISC_VA + KS8695_HMC); | |
1005 | */ | |
1006 | return -EOPNOTSUPP; | |
1007 | case KS8695_DTYPE_WAN: | |
1008 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1009 | ||
1010 | /* disable auto-negotiation */ | |
1011 | ctrl |= WMC_WAND; | |
1012 | ctrl &= ~(WMC_WANF100 | WMC_WANFF); | |
1013 | ||
1014 | if (cmd->speed == SPEED_100) | |
1015 | ctrl |= WMC_WANF100; | |
1016 | if (cmd->duplex == DUPLEX_FULL) | |
1017 | ctrl |= WMC_WANFF; | |
1018 | ||
1019 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1020 | break; | |
1021 | case KS8695_DTYPE_LAN: | |
1022 | return -EOPNOTSUPP; | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * ks8695_nwayreset - Restart the autonegotiation on the port. | |
1031 | * @ndev: The network device to restart autoneotiation on | |
1032 | */ | |
1033 | static int | |
1034 | ks8695_nwayreset(struct net_device *ndev) | |
1035 | { | |
1036 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1037 | u32 ctrl; | |
1038 | ||
1039 | switch (ksp->dtype) { | |
1040 | case KS8695_DTYPE_HPNA: | |
1041 | /* No phy means no autonegotiation on hpna */ | |
1042 | return -EINVAL; | |
1043 | case KS8695_DTYPE_WAN: | |
1044 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1045 | ||
1046 | if ((ctrl & WMC_WAND) == 0) | |
1047 | writel(ctrl | WMC_WANR, | |
1048 | ksp->phyiface_regs + KS8695_WMC); | |
1049 | else | |
1050 | /* auto-negotiation not enabled */ | |
1051 | return -EINVAL; | |
1052 | break; | |
1053 | case KS8695_DTYPE_LAN: | |
1054 | return -EOPNOTSUPP; | |
1055 | } | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | /** | |
1061 | * ks8695_get_link - Retrieve link status of network interface | |
1062 | * @ndev: The network interface to retrive the link status of. | |
1063 | */ | |
1064 | static u32 | |
1065 | ks8695_get_link(struct net_device *ndev) | |
1066 | { | |
1067 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1068 | u32 ctrl; | |
1069 | ||
1070 | switch (ksp->dtype) { | |
1071 | case KS8695_DTYPE_HPNA: | |
1072 | /* HPNA always has link */ | |
1073 | return 1; | |
1074 | case KS8695_DTYPE_WAN: | |
1075 | /* WAN we can read the PHY for */ | |
1076 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1077 | return ctrl & WMC_WLS; | |
1078 | case KS8695_DTYPE_LAN: | |
1079 | return -EOPNOTSUPP; | |
1080 | } | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | /** | |
1085 | * ks8695_get_pause - Retrieve network pause/flow-control advertising | |
1086 | * @ndev: The device to retrieve settings from | |
1087 | * @param: The structure to fill out with the information | |
1088 | */ | |
1089 | static void | |
1090 | ks8695_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) | |
1091 | { | |
1092 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1093 | u32 ctrl; | |
1094 | ||
1095 | switch (ksp->dtype) { | |
1096 | case KS8695_DTYPE_HPNA: | |
1097 | /* No phy link on hpna to configure */ | |
1098 | return; | |
1099 | case KS8695_DTYPE_WAN: | |
1100 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1101 | ||
1102 | /* advertise Pause */ | |
1103 | param->autoneg = (ctrl & WMC_WANAP); | |
1104 | ||
1105 | /* current Rx Flow-control */ | |
1106 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1107 | param->rx_pause = (ctrl & DRXC_RFCE); | |
1108 | ||
1109 | /* current Tx Flow-control */ | |
1110 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
1111 | param->tx_pause = (ctrl & DTXC_TFCE); | |
1112 | break; | |
1113 | case KS8695_DTYPE_LAN: | |
1114 | /* The LAN's "phy" is a direct-attached switch */ | |
1115 | return; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | /** | |
1120 | * ks8695_set_pause - Configure pause/flow-control | |
1121 | * @ndev: The device to configure | |
1122 | * @param: The pause parameters to set | |
1123 | * | |
1124 | * TODO: Implement this | |
1125 | */ | |
1126 | static int | |
1127 | ks8695_set_pause(struct net_device *ndev, struct ethtool_pauseparam *param) | |
1128 | { | |
1129 | return -EOPNOTSUPP; | |
1130 | } | |
1131 | ||
1132 | /** | |
1133 | * ks8695_get_drvinfo - Retrieve driver information | |
1134 | * @ndev: The network device to retrieve info about | |
1135 | * @info: The info structure to fill out. | |
1136 | */ | |
1137 | static void | |
1138 | ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) | |
1139 | { | |
1140 | strlcpy(info->driver, MODULENAME, sizeof(info->driver)); | |
1141 | strlcpy(info->version, MODULEVERSION, sizeof(info->version)); | |
c2313557 | 1142 | strlcpy(info->bus_info, dev_name(ndev->dev.parent), |
7a3c66e2 DS |
1143 | sizeof(info->bus_info)); |
1144 | } | |
1145 | ||
0fc0b732 | 1146 | static const struct ethtool_ops ks8695_ethtool_ops = { |
7a3c66e2 DS |
1147 | .get_msglevel = ks8695_get_msglevel, |
1148 | .set_msglevel = ks8695_set_msglevel, | |
1149 | .get_settings = ks8695_get_settings, | |
1150 | .set_settings = ks8695_set_settings, | |
1151 | .nway_reset = ks8695_nwayreset, | |
1152 | .get_link = ks8695_get_link, | |
1153 | .get_pauseparam = ks8695_get_pause, | |
1154 | .set_pauseparam = ks8695_set_pause, | |
1155 | .get_drvinfo = ks8695_get_drvinfo, | |
1156 | }; | |
1157 | ||
1158 | /* Network device interface functions */ | |
1159 | ||
1160 | /** | |
1161 | * ks8695_set_mac - Update MAC in net dev and HW | |
1162 | * @ndev: The network device to update | |
1163 | * @addr: The new MAC address to set | |
1164 | */ | |
1165 | static int | |
1166 | ks8695_set_mac(struct net_device *ndev, void *addr) | |
1167 | { | |
1168 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1169 | struct sockaddr *address = addr; | |
1170 | ||
1171 | if (!is_valid_ether_addr(address->sa_data)) | |
1172 | return -EADDRNOTAVAIL; | |
1173 | ||
1174 | memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); | |
1175 | ||
1176 | ks8695_update_mac(ksp); | |
1177 | ||
1178 | dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", | |
1179 | ndev->name, ndev->dev_addr); | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | /** | |
1185 | * ks8695_set_multicast - Set up the multicast behaviour of the interface | |
1186 | * @ndev: The net_device to configure | |
1187 | * | |
1188 | * This routine, called by the net layer, configures promiscuity | |
1189 | * and multicast reception behaviour for the interface. | |
1190 | */ | |
1191 | static void | |
1192 | ks8695_set_multicast(struct net_device *ndev) | |
1193 | { | |
1194 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1195 | u32 ctrl; | |
1196 | ||
1197 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1198 | ||
1199 | if (ndev->flags & IFF_PROMISC) { | |
1200 | /* enable promiscuous mode */ | |
1201 | ctrl |= DRXC_RA; | |
1202 | } else if (ndev->flags & ~IFF_PROMISC) { | |
1203 | /* disable promiscuous mode */ | |
1204 | ctrl &= ~DRXC_RA; | |
1205 | } | |
1206 | ||
1207 | if (ndev->flags & IFF_ALLMULTI) { | |
1208 | /* enable all multicast mode */ | |
1209 | ctrl |= DRXC_RM; | |
4cd24eaf | 1210 | } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) { |
7a3c66e2 DS |
1211 | /* more specific multicast addresses than can be |
1212 | * handled in hardware | |
1213 | */ | |
1214 | ctrl |= DRXC_RM; | |
1215 | } else { | |
1216 | /* enable specific multicasts */ | |
1217 | ctrl &= ~DRXC_RM; | |
1218 | ks8695_init_partial_multicast(ksp, ndev->mc_list, | |
4cd24eaf | 1219 | netdev_mc_count(ndev)); |
7a3c66e2 DS |
1220 | } |
1221 | ||
1222 | ks8695_writereg(ksp, KS8695_DRXC, ctrl); | |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * ks8695_timeout - Handle a network tx/rx timeout. | |
1227 | * @ndev: The net_device which timed out. | |
1228 | * | |
1229 | * A network transaction timed out, reset the device. | |
1230 | */ | |
1231 | static void | |
1232 | ks8695_timeout(struct net_device *ndev) | |
1233 | { | |
1234 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1235 | ||
1236 | netif_stop_queue(ndev); | |
1237 | ks8695_shutdown(ksp); | |
1238 | ||
1239 | ks8695_reset(ksp); | |
1240 | ||
1241 | ks8695_update_mac(ksp); | |
1242 | ||
1243 | /* We ignore the return from this since it managed to init | |
1244 | * before it probably will be okay to init again. | |
1245 | */ | |
1246 | ks8695_init_net(ksp); | |
1247 | ||
1248 | /* Reconfigure promiscuity etc */ | |
1249 | ks8695_set_multicast(ndev); | |
1250 | ||
1251 | /* And start the TX queue once more */ | |
1252 | netif_start_queue(ndev); | |
1253 | } | |
1254 | ||
1255 | /** | |
1256 | * ks8695_start_xmit - Start a packet transmission | |
1257 | * @skb: The packet to transmit | |
1258 | * @ndev: The network device to send the packet on | |
1259 | * | |
1260 | * This routine, called by the net layer, takes ownership of the | |
1261 | * sk_buff and adds it to the TX ring. It then kicks the TX DMA | |
1262 | * engine to ensure transmission begins. | |
1263 | */ | |
1264 | static int | |
1265 | ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1266 | { | |
1267 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1268 | int buff_n; | |
1269 | dma_addr_t dmap; | |
1270 | ||
1271 | spin_lock_irq(&ksp->txq_lock); | |
1272 | ||
1273 | if (ksp->tx_ring_used == MAX_TX_DESC) { | |
1274 | /* Somehow we got entered when we have no room */ | |
1275 | spin_unlock_irq(&ksp->txq_lock); | |
1276 | return NETDEV_TX_BUSY; | |
1277 | } | |
1278 | ||
1279 | buff_n = ksp->tx_ring_next_slot; | |
1280 | ||
1281 | BUG_ON(ksp->tx_buffers[buff_n].skb); | |
1282 | ||
1283 | dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); | |
1284 | if (unlikely(dma_mapping_error(ksp->dev, dmap))) { | |
1285 | /* Failed to DMA map this SKB, give it back for now */ | |
1286 | spin_unlock_irq(&ksp->txq_lock); | |
1287 | dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ | |
1288 | "transmission, trying later\n", ndev->name); | |
1289 | return NETDEV_TX_BUSY; | |
1290 | } | |
1291 | ||
1292 | ksp->tx_buffers[buff_n].dma_ptr = dmap; | |
1293 | /* Mapped okay, store the buffer pointer and length for later */ | |
1294 | ksp->tx_buffers[buff_n].skb = skb; | |
1295 | ksp->tx_buffers[buff_n].length = skb->len; | |
1296 | ||
1297 | /* Fill out the TX descriptor */ | |
1298 | ksp->tx_ring[buff_n].data_ptr = | |
1299 | cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); | |
1300 | ksp->tx_ring[buff_n].status = | |
1301 | cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | | |
1302 | (skb->len & TDES_TBS)); | |
1303 | ||
1304 | wmb(); | |
1305 | ||
1306 | /* Hand it over to the hardware */ | |
1307 | ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); | |
1308 | ||
1309 | if (++ksp->tx_ring_used == MAX_TX_DESC) | |
1310 | netif_stop_queue(ndev); | |
1311 | ||
1312 | ndev->trans_start = jiffies; | |
1313 | ||
1314 | /* Kick the TX DMA in case it decided to go IDLE */ | |
1315 | ks8695_writereg(ksp, KS8695_DTSC, 0); | |
1316 | ||
1317 | /* And update the next ring slot */ | |
1318 | ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; | |
1319 | ||
1320 | spin_unlock_irq(&ksp->txq_lock); | |
1321 | return NETDEV_TX_OK; | |
1322 | } | |
1323 | ||
1324 | /** | |
1325 | * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface | |
1326 | * @ndev: The net_device to stop | |
1327 | * | |
1328 | * This disables the TX queue and cleans up a KS8695 ethernet | |
1329 | * device. | |
1330 | */ | |
1331 | static int | |
1332 | ks8695_stop(struct net_device *ndev) | |
1333 | { | |
1334 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1335 | ||
1336 | netif_stop_queue(ndev); | |
68d8287c | 1337 | napi_disable(&ksp->napi); |
7a3c66e2 DS |
1338 | netif_carrier_off(ndev); |
1339 | ||
1340 | ks8695_shutdown(ksp); | |
1341 | ||
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | /** | |
1346 | * ks8695_open - Open (bring up) a KS8695 ethernet interface | |
1347 | * @ndev: The net_device to open | |
1348 | * | |
1349 | * This resets, configures the MAC, initialises the RX ring and | |
1350 | * DMA engines and starts the TX queue for a KS8695 ethernet | |
1351 | * device. | |
1352 | */ | |
1353 | static int | |
1354 | ks8695_open(struct net_device *ndev) | |
1355 | { | |
1356 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1357 | int ret; | |
1358 | ||
1359 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1360 | return -EADDRNOTAVAIL; | |
1361 | ||
1362 | ks8695_reset(ksp); | |
1363 | ||
1364 | ks8695_update_mac(ksp); | |
1365 | ||
1366 | ret = ks8695_init_net(ksp); | |
1367 | if (ret) { | |
1368 | ks8695_shutdown(ksp); | |
1369 | return ret; | |
1370 | } | |
1371 | ||
68d8287c | 1372 | napi_enable(&ksp->napi); |
7a3c66e2 DS |
1373 | netif_start_queue(ndev); |
1374 | ||
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | /* Platform device driver */ | |
1379 | ||
1380 | /** | |
1381 | * ks8695_init_switch - Init LAN switch to known good defaults. | |
1382 | * @ksp: The device to initialise | |
1383 | * | |
1384 | * This initialises the LAN switch in the KS8695 to a known-good | |
1385 | * set of defaults. | |
1386 | */ | |
1387 | static void __devinit | |
1388 | ks8695_init_switch(struct ks8695_priv *ksp) | |
1389 | { | |
1390 | u32 ctrl; | |
1391 | ||
1392 | /* Default value for SEC0 according to datasheet */ | |
1393 | ctrl = 0x40819e00; | |
1394 | ||
1395 | /* LED0 = Speed LED1 = Link/Activity */ | |
1396 | ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); | |
1397 | ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); | |
1398 | ||
1399 | /* Enable Switch */ | |
1400 | ctrl |= SEC0_ENABLE; | |
1401 | ||
1402 | writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); | |
1403 | ||
1404 | /* Defaults for SEC1 */ | |
1405 | writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); | |
1406 | } | |
1407 | ||
1408 | /** | |
1409 | * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults | |
1410 | * @ksp: The device to initialise | |
1411 | * | |
1412 | * This initialises a KS8695's WAN phy to sensible values for | |
1413 | * autonegotiation etc. | |
1414 | */ | |
1415 | static void __devinit | |
1416 | ks8695_init_wan_phy(struct ks8695_priv *ksp) | |
1417 | { | |
1418 | u32 ctrl; | |
1419 | ||
1420 | /* Support auto-negotiation */ | |
1421 | ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | | |
1422 | WMC_WANA10F | WMC_WANA10H); | |
1423 | ||
1424 | /* LED0 = Activity , LED1 = Link */ | |
1425 | ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); | |
1426 | ||
1427 | /* Restart Auto-negotiation */ | |
1428 | ctrl |= WMC_WANR; | |
1429 | ||
1430 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1431 | ||
1432 | writel(0, ksp->phyiface_regs + KS8695_WPPM); | |
1433 | writel(0, ksp->phyiface_regs + KS8695_PPS); | |
1434 | } | |
1435 | ||
1436 | static const struct net_device_ops ks8695_netdev_ops = { | |
1437 | .ndo_open = ks8695_open, | |
1438 | .ndo_stop = ks8695_stop, | |
1439 | .ndo_start_xmit = ks8695_start_xmit, | |
1440 | .ndo_tx_timeout = ks8695_timeout, | |
1441 | .ndo_set_mac_address = ks8695_set_mac, | |
52255bbe | 1442 | .ndo_validate_addr = eth_validate_addr, |
7a3c66e2 DS |
1443 | .ndo_set_multicast_list = ks8695_set_multicast, |
1444 | }; | |
1445 | ||
1446 | /** | |
1447 | * ks8695_probe - Probe and initialise a KS8695 ethernet interface | |
1448 | * @pdev: The platform device to probe | |
1449 | * | |
1450 | * Initialise a KS8695 ethernet device from platform data. | |
1451 | * | |
1452 | * This driver requires at least one IORESOURCE_MEM for the | |
1453 | * registers and two IORESOURCE_IRQ for the RX and TX IRQs | |
1454 | * respectively. It can optionally take an additional | |
1455 | * IORESOURCE_MEM for the switch or phy in the case of the lan or | |
1456 | * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan | |
1457 | * port. | |
1458 | */ | |
1459 | static int __devinit | |
1460 | ks8695_probe(struct platform_device *pdev) | |
1461 | { | |
1462 | struct ks8695_priv *ksp; | |
1463 | struct net_device *ndev; | |
1464 | struct resource *regs_res, *phyiface_res; | |
1465 | struct resource *rxirq_res, *txirq_res, *linkirq_res; | |
1466 | int ret = 0; | |
1467 | int buff_n; | |
1468 | u32 machigh, maclow; | |
1469 | ||
1470 | /* Initialise a net_device */ | |
1471 | ndev = alloc_etherdev(sizeof(struct ks8695_priv)); | |
1472 | if (!ndev) { | |
1473 | dev_err(&pdev->dev, "could not allocate device.\n"); | |
1474 | return -ENOMEM; | |
1475 | } | |
1476 | ||
1477 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1478 | ||
1479 | dev_dbg(&pdev->dev, "ks8695_probe() called\n"); | |
1480 | ||
1481 | /* Configure our private structure a little */ | |
1482 | ksp = netdev_priv(ndev); | |
1483 | memset(ksp, 0, sizeof(struct ks8695_priv)); | |
1484 | ||
1485 | ksp->dev = &pdev->dev; | |
1486 | ksp->ndev = ndev; | |
1487 | ksp->msg_enable = NETIF_MSG_LINK; | |
1488 | ||
1489 | /* Retrieve resources */ | |
1490 | regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1491 | phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1492 | ||
1493 | rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1494 | txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); | |
1495 | linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); | |
1496 | ||
1497 | if (!(regs_res && rxirq_res && txirq_res)) { | |
1498 | dev_err(ksp->dev, "insufficient resources\n"); | |
1499 | ret = -ENOENT; | |
1500 | goto failure; | |
1501 | } | |
1502 | ||
1503 | ksp->regs_req = request_mem_region(regs_res->start, | |
1504 | resource_size(regs_res), | |
1505 | pdev->name); | |
1506 | ||
1507 | if (!ksp->regs_req) { | |
1508 | dev_err(ksp->dev, "cannot claim register space\n"); | |
1509 | ret = -EIO; | |
1510 | goto failure; | |
1511 | } | |
1512 | ||
1513 | ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); | |
1514 | ||
1515 | if (!ksp->io_regs) { | |
1516 | dev_err(ksp->dev, "failed to ioremap registers\n"); | |
1517 | ret = -EINVAL; | |
1518 | goto failure; | |
1519 | } | |
1520 | ||
1521 | if (phyiface_res) { | |
1522 | ksp->phyiface_req = | |
1523 | request_mem_region(phyiface_res->start, | |
1524 | resource_size(phyiface_res), | |
1525 | phyiface_res->name); | |
1526 | ||
1527 | if (!ksp->phyiface_req) { | |
1528 | dev_err(ksp->dev, | |
1529 | "cannot claim switch register space\n"); | |
1530 | ret = -EIO; | |
1531 | goto failure; | |
1532 | } | |
1533 | ||
1534 | ksp->phyiface_regs = ioremap(phyiface_res->start, | |
1535 | resource_size(phyiface_res)); | |
1536 | ||
1537 | if (!ksp->phyiface_regs) { | |
1538 | dev_err(ksp->dev, | |
1539 | "failed to ioremap switch registers\n"); | |
1540 | ret = -EINVAL; | |
1541 | goto failure; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | ksp->rx_irq = rxirq_res->start; | |
1546 | ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; | |
1547 | ksp->tx_irq = txirq_res->start; | |
1548 | ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; | |
1549 | ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); | |
1550 | ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? | |
1551 | linkirq_res->name : "Ethernet Link"; | |
1552 | ||
1553 | /* driver system setup */ | |
1554 | ndev->netdev_ops = &ks8695_netdev_ops; | |
1555 | SET_ETHTOOL_OPS(ndev, &ks8695_ethtool_ops); | |
1556 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); | |
1557 | ||
68d8287c | 1558 | netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT); |
31b73ab3 | 1559 | |
7a3c66e2 DS |
1560 | /* Retrieve the default MAC addr from the chip. */ |
1561 | /* The bootloader should have left it in there for us. */ | |
1562 | ||
1563 | machigh = ks8695_readreg(ksp, KS8695_MAH); | |
1564 | maclow = ks8695_readreg(ksp, KS8695_MAL); | |
1565 | ||
1566 | ndev->dev_addr[0] = (machigh >> 8) & 0xFF; | |
1567 | ndev->dev_addr[1] = machigh & 0xFF; | |
1568 | ndev->dev_addr[2] = (maclow >> 24) & 0xFF; | |
1569 | ndev->dev_addr[3] = (maclow >> 16) & 0xFF; | |
1570 | ndev->dev_addr[4] = (maclow >> 8) & 0xFF; | |
1571 | ndev->dev_addr[5] = maclow & 0xFF; | |
1572 | ||
1573 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1574 | dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " | |
1575 | "set using ifconfig\n", ndev->name); | |
1576 | ||
1577 | /* In order to be efficient memory-wise, we allocate both | |
1578 | * rings in one go. | |
1579 | */ | |
1580 | ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, | |
1581 | &ksp->ring_base_dma, GFP_KERNEL); | |
1582 | if (!ksp->ring_base) { | |
1583 | ret = -ENOMEM; | |
1584 | goto failure; | |
1585 | } | |
1586 | ||
1587 | /* Specify the TX DMA ring buffer */ | |
1588 | ksp->tx_ring = ksp->ring_base; | |
1589 | ksp->tx_ring_dma = ksp->ring_base_dma; | |
1590 | ||
1591 | /* And initialise the queue's lock */ | |
1592 | spin_lock_init(&ksp->txq_lock); | |
31b73ab3 | 1593 | spin_lock_init(&ksp->rx_lock); |
7a3c66e2 DS |
1594 | |
1595 | /* Specify the RX DMA ring buffer */ | |
1596 | ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; | |
1597 | ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; | |
1598 | ||
1599 | /* Zero the descriptor rings */ | |
1600 | memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); | |
1601 | memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); | |
1602 | ||
1603 | /* Build the rings */ | |
1604 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
1605 | ksp->tx_ring[buff_n].next_desc = | |
1606 | cpu_to_le32(ksp->tx_ring_dma + | |
1607 | (sizeof(struct tx_ring_desc) * | |
1608 | ((buff_n + 1) & MAX_TX_DESC_MASK))); | |
1609 | } | |
1610 | ||
1611 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
1612 | ksp->rx_ring[buff_n].next_desc = | |
1613 | cpu_to_le32(ksp->rx_ring_dma + | |
1614 | (sizeof(struct rx_ring_desc) * | |
1615 | ((buff_n + 1) & MAX_RX_DESC_MASK))); | |
1616 | } | |
1617 | ||
1618 | /* Initialise the port (physically) */ | |
1619 | if (ksp->phyiface_regs && ksp->link_irq == -1) { | |
1620 | ks8695_init_switch(ksp); | |
1621 | ksp->dtype = KS8695_DTYPE_LAN; | |
1622 | } else if (ksp->phyiface_regs && ksp->link_irq != -1) { | |
1623 | ks8695_init_wan_phy(ksp); | |
1624 | ksp->dtype = KS8695_DTYPE_WAN; | |
1625 | } else { | |
1626 | /* No initialisation since HPNA does not have a PHY */ | |
1627 | ksp->dtype = KS8695_DTYPE_HPNA; | |
1628 | } | |
1629 | ||
1630 | /* And bring up the net_device with the net core */ | |
1631 | platform_set_drvdata(pdev, ndev); | |
1632 | ret = register_netdev(ndev); | |
1633 | ||
1634 | if (ret == 0) { | |
1635 | dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", | |
1636 | ks8695_port_type(ksp), ndev->dev_addr); | |
1637 | } else { | |
1638 | /* Report the failure to register the net_device */ | |
1639 | dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); | |
1640 | goto failure; | |
1641 | } | |
1642 | ||
1643 | /* All is well */ | |
1644 | return 0; | |
1645 | ||
1646 | /* Error exit path */ | |
1647 | failure: | |
1648 | ks8695_release_device(ksp); | |
1649 | free_netdev(ndev); | |
1650 | ||
1651 | return ret; | |
1652 | } | |
1653 | ||
1654 | /** | |
1655 | * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. | |
1656 | * @pdev: The device to suspend | |
1657 | * @state: The suspend state | |
1658 | * | |
1659 | * This routine detaches and shuts down a KS8695 ethernet device. | |
1660 | */ | |
1661 | static int | |
1662 | ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
1663 | { | |
1664 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1665 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1666 | ||
1667 | ksp->in_suspend = 1; | |
1668 | ||
1669 | if (netif_running(ndev)) { | |
1670 | netif_device_detach(ndev); | |
1671 | ks8695_shutdown(ksp); | |
1672 | } | |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | /** | |
1678 | * ks8695_drv_resume - Resume a KS8695 ethernet platform device. | |
1679 | * @pdev: The device to resume | |
1680 | * | |
1681 | * This routine re-initialises and re-attaches a KS8695 ethernet | |
1682 | * device. | |
1683 | */ | |
1684 | static int | |
1685 | ks8695_drv_resume(struct platform_device *pdev) | |
1686 | { | |
1687 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1688 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1689 | ||
1690 | if (netif_running(ndev)) { | |
1691 | ks8695_reset(ksp); | |
1692 | ks8695_init_net(ksp); | |
1693 | ks8695_set_multicast(ndev); | |
1694 | netif_device_attach(ndev); | |
1695 | } | |
1696 | ||
1697 | ksp->in_suspend = 0; | |
1698 | ||
1699 | return 0; | |
1700 | } | |
1701 | ||
1702 | /** | |
1703 | * ks8695_drv_remove - Remove a KS8695 net device on driver unload. | |
1704 | * @pdev: The platform device to remove | |
1705 | * | |
1706 | * This unregisters and releases a KS8695 ethernet device. | |
1707 | */ | |
1708 | static int __devexit | |
1709 | ks8695_drv_remove(struct platform_device *pdev) | |
1710 | { | |
1711 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1712 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1713 | ||
1714 | platform_set_drvdata(pdev, NULL); | |
31b73ab3 | 1715 | netif_napi_del(&ksp->napi); |
7a3c66e2 DS |
1716 | |
1717 | unregister_netdev(ndev); | |
1718 | ks8695_release_device(ksp); | |
1719 | free_netdev(ndev); | |
1720 | ||
1721 | dev_dbg(&pdev->dev, "released and freed device\n"); | |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | static struct platform_driver ks8695_driver = { | |
1726 | .driver = { | |
1727 | .name = MODULENAME, | |
1728 | .owner = THIS_MODULE, | |
1729 | }, | |
1730 | .probe = ks8695_probe, | |
1731 | .remove = __devexit_p(ks8695_drv_remove), | |
1732 | .suspend = ks8695_drv_suspend, | |
1733 | .resume = ks8695_drv_resume, | |
1734 | }; | |
1735 | ||
1736 | /* Module interface */ | |
1737 | ||
1738 | static int __init | |
1739 | ks8695_init(void) | |
1740 | { | |
1741 | printk(KERN_INFO "%s Ethernet driver, V%s\n", | |
1742 | MODULENAME, MODULEVERSION); | |
1743 | ||
1744 | return platform_driver_register(&ks8695_driver); | |
1745 | } | |
1746 | ||
1747 | static void __exit | |
1748 | ks8695_cleanup(void) | |
1749 | { | |
1750 | platform_driver_unregister(&ks8695_driver); | |
1751 | } | |
1752 | ||
1753 | module_init(ks8695_init); | |
1754 | module_exit(ks8695_cleanup); | |
1755 | ||
1756 | MODULE_AUTHOR("Simtec Electronics") | |
1757 | MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); | |
1758 | MODULE_LICENSE("GPL"); | |
1759 | MODULE_ALIAS("platform:" MODULENAME); | |
1760 | ||
1761 | module_param(watchdog, int, 0400); | |
1762 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); |