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 | ||
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 | 32 | #include <linux/io.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
7a3c66e2 DS |
34 | |
35 | #include <asm/irq.h> | |
36 | ||
37 | #include <mach/regs-switch.h> | |
38 | #include <mach/regs-misc.h> | |
31b73ab3 F |
39 | #include <asm/mach/irq.h> |
40 | #include <mach/regs-irq.h> | |
7a3c66e2 DS |
41 | |
42 | #include "ks8695net.h" | |
43 | ||
44 | #define MODULENAME "ks8695_ether" | |
68d8287c | 45 | #define MODULEVERSION "1.02" |
31b73ab3 | 46 | |
7a3c66e2 DS |
47 | /* |
48 | * Transmit and device reset timeout, default 5 seconds. | |
49 | */ | |
50 | static int watchdog = 5000; | |
51 | ||
52 | /* Hardware structures */ | |
53 | ||
54 | /** | |
55 | * struct rx_ring_desc - Receive descriptor ring element | |
56 | * @status: The status of the descriptor element (E.g. who owns it) | |
57 | * @length: The number of bytes in the block pointed to by data_ptr | |
58 | * @data_ptr: The physical address of the data block to receive into | |
59 | * @next_desc: The physical address of the next descriptor element. | |
60 | */ | |
61 | struct rx_ring_desc { | |
62 | __le32 status; | |
63 | __le32 length; | |
64 | __le32 data_ptr; | |
65 | __le32 next_desc; | |
66 | }; | |
67 | ||
68 | /** | |
69 | * struct tx_ring_desc - Transmit descriptor ring element | |
70 | * @owner: Who owns the descriptor | |
71 | * @status: The number of bytes in the block pointed to by data_ptr | |
72 | * @data_ptr: The physical address of the data block to receive into | |
73 | * @next_desc: The physical address of the next descriptor element. | |
74 | */ | |
75 | struct tx_ring_desc { | |
76 | __le32 owner; | |
77 | __le32 status; | |
78 | __le32 data_ptr; | |
79 | __le32 next_desc; | |
80 | }; | |
81 | ||
82 | /** | |
83 | * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. | |
84 | * @skb: The buffer in the ring | |
85 | * @dma_ptr: The mapped DMA pointer of the buffer | |
86 | * @length: The number of bytes mapped to dma_ptr | |
87 | */ | |
88 | struct ks8695_skbuff { | |
89 | struct sk_buff *skb; | |
90 | dma_addr_t dma_ptr; | |
91 | u32 length; | |
92 | }; | |
93 | ||
94 | /* Private device structure */ | |
95 | ||
96 | #define MAX_TX_DESC 8 | |
97 | #define MAX_TX_DESC_MASK 0x7 | |
98 | #define MAX_RX_DESC 16 | |
99 | #define MAX_RX_DESC_MASK 0xf | |
100 | ||
68d8287c F |
101 | /*napi_weight have better more than rx DMA buffers*/ |
102 | #define NAPI_WEIGHT 64 | |
103 | ||
7a3c66e2 DS |
104 | #define MAX_RXBUF_SIZE 0x700 |
105 | ||
106 | #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) | |
107 | #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) | |
108 | #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) | |
109 | ||
110 | /** | |
111 | * enum ks8695_dtype - Device type | |
112 | * @KS8695_DTYPE_WAN: This device is a WAN interface | |
113 | * @KS8695_DTYPE_LAN: This device is a LAN interface | |
114 | * @KS8695_DTYPE_HPNA: This device is an HPNA interface | |
115 | */ | |
116 | enum ks8695_dtype { | |
117 | KS8695_DTYPE_WAN, | |
118 | KS8695_DTYPE_LAN, | |
119 | KS8695_DTYPE_HPNA, | |
120 | }; | |
121 | ||
122 | /** | |
123 | * struct ks8695_priv - Private data for the KS8695 Ethernet | |
124 | * @in_suspend: Flag to indicate if we're suspending/resuming | |
125 | * @ndev: The net_device for this interface | |
126 | * @dev: The platform device object for this interface | |
127 | * @dtype: The type of this device | |
128 | * @io_regs: The ioremapped registers for this interface | |
68d8287c | 129 | * @napi : Add support NAPI for Rx |
7a3c66e2 DS |
130 | * @rx_irq_name: The textual name of the RX IRQ from the platform data |
131 | * @tx_irq_name: The textual name of the TX IRQ from the platform data | |
132 | * @link_irq_name: The textual name of the link IRQ from the | |
133 | * platform data if available | |
134 | * @rx_irq: The IRQ number for the RX IRQ | |
135 | * @tx_irq: The IRQ number for the TX IRQ | |
136 | * @link_irq: The IRQ number for the link IRQ if available | |
137 | * @regs_req: The resource request for the registers region | |
138 | * @phyiface_req: The resource request for the phy/switch region | |
139 | * if available | |
140 | * @phyiface_regs: The ioremapped registers for the phy/switch if available | |
141 | * @ring_base: The base pointer of the dma coherent memory for the rings | |
142 | * @ring_base_dma: The DMA mapped equivalent of ring_base | |
143 | * @tx_ring: The pointer in ring_base of the TX ring | |
144 | * @tx_ring_used: The number of slots in the TX ring which are occupied | |
145 | * @tx_ring_next_slot: The next slot to fill in the TX ring | |
146 | * @tx_ring_dma: The DMA mapped equivalent of tx_ring | |
147 | * @tx_buffers: The sk_buff mappings for the TX ring | |
148 | * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables | |
149 | * @rx_ring: The pointer in ring_base of the RX ring | |
150 | * @rx_ring_dma: The DMA mapped equivalent of rx_ring | |
151 | * @rx_buffers: The sk_buff mappings for the RX ring | |
152 | * @next_rx_desc_read: The next RX descriptor to read from on IRQ | |
68d8287c | 153 | * @rx_lock: A lock to protect Rx irq function |
7a3c66e2 DS |
154 | * @msg_enable: The flags for which messages to emit |
155 | */ | |
156 | struct ks8695_priv { | |
157 | int in_suspend; | |
158 | struct net_device *ndev; | |
159 | struct device *dev; | |
160 | enum ks8695_dtype dtype; | |
161 | void __iomem *io_regs; | |
162 | ||
31b73ab3 F |
163 | struct napi_struct napi; |
164 | ||
7a3c66e2 DS |
165 | const char *rx_irq_name, *tx_irq_name, *link_irq_name; |
166 | int rx_irq, tx_irq, link_irq; | |
167 | ||
168 | struct resource *regs_req, *phyiface_req; | |
169 | void __iomem *phyiface_regs; | |
170 | ||
171 | void *ring_base; | |
172 | dma_addr_t ring_base_dma; | |
173 | ||
174 | struct tx_ring_desc *tx_ring; | |
175 | int tx_ring_used; | |
176 | int tx_ring_next_slot; | |
177 | dma_addr_t tx_ring_dma; | |
178 | struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; | |
179 | spinlock_t txq_lock; | |
180 | ||
181 | struct rx_ring_desc *rx_ring; | |
182 | dma_addr_t rx_ring_dma; | |
183 | struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; | |
184 | int next_rx_desc_read; | |
31b73ab3 | 185 | spinlock_t rx_lock; |
7a3c66e2 DS |
186 | |
187 | int msg_enable; | |
188 | }; | |
189 | ||
190 | /* Register access */ | |
191 | ||
192 | /** | |
193 | * ks8695_readreg - Read from a KS8695 ethernet register | |
194 | * @ksp: The device to read from | |
195 | * @reg: The register to read | |
196 | */ | |
197 | static inline u32 | |
198 | ks8695_readreg(struct ks8695_priv *ksp, int reg) | |
199 | { | |
200 | return readl(ksp->io_regs + reg); | |
201 | } | |
202 | ||
203 | /** | |
204 | * ks8695_writereg - Write to a KS8695 ethernet register | |
205 | * @ksp: The device to write to | |
206 | * @reg: The register to write | |
207 | * @value: The value to write to the register | |
208 | */ | |
209 | static inline void | |
210 | ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) | |
211 | { | |
212 | writel(value, ksp->io_regs + reg); | |
213 | } | |
214 | ||
215 | /* Utility functions */ | |
216 | ||
217 | /** | |
218 | * ks8695_port_type - Retrieve port-type as user-friendly string | |
219 | * @ksp: The device to return the type for | |
220 | * | |
221 | * Returns a string indicating which of the WAN, LAN or HPNA | |
222 | * ports this device is likely to represent. | |
223 | */ | |
224 | static const char * | |
225 | ks8695_port_type(struct ks8695_priv *ksp) | |
226 | { | |
227 | switch (ksp->dtype) { | |
228 | case KS8695_DTYPE_LAN: | |
229 | return "LAN"; | |
230 | case KS8695_DTYPE_WAN: | |
231 | return "WAN"; | |
232 | case KS8695_DTYPE_HPNA: | |
233 | return "HPNA"; | |
234 | } | |
235 | ||
236 | return "UNKNOWN"; | |
237 | } | |
238 | ||
239 | /** | |
240 | * ks8695_update_mac - Update the MAC registers in the device | |
241 | * @ksp: The device to update | |
242 | * | |
243 | * Updates the MAC registers in the KS8695 device from the address in the | |
244 | * net_device structure associated with this interface. | |
245 | */ | |
246 | static void | |
247 | ks8695_update_mac(struct ks8695_priv *ksp) | |
248 | { | |
249 | /* Update the HW with the MAC from the net_device */ | |
250 | struct net_device *ndev = ksp->ndev; | |
251 | u32 machigh, maclow; | |
252 | ||
253 | maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | | |
254 | (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); | |
255 | machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); | |
256 | ||
257 | ks8695_writereg(ksp, KS8695_MAL, maclow); | |
258 | ks8695_writereg(ksp, KS8695_MAH, machigh); | |
259 | ||
260 | } | |
261 | ||
262 | /** | |
263 | * ks8695_refill_rxbuffers - Re-fill the RX buffer ring | |
264 | * @ksp: The device to refill | |
265 | * | |
266 | * Iterates the RX ring of the device looking for empty slots. | |
267 | * For each empty slot, we allocate and map a new SKB and give it | |
268 | * to the hardware. | |
269 | * This can be called from interrupt context safely. | |
270 | */ | |
271 | static void | |
272 | ks8695_refill_rxbuffers(struct ks8695_priv *ksp) | |
273 | { | |
274 | /* Run around the RX ring, filling in any missing sk_buff's */ | |
275 | int buff_n; | |
276 | ||
277 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
278 | if (!ksp->rx_buffers[buff_n].skb) { | |
279 | struct sk_buff *skb = dev_alloc_skb(MAX_RXBUF_SIZE); | |
280 | dma_addr_t mapping; | |
281 | ||
282 | ksp->rx_buffers[buff_n].skb = skb; | |
283 | if (skb == NULL) { | |
284 | /* Failed to allocate one, perhaps | |
285 | * we'll try again later. | |
286 | */ | |
287 | break; | |
288 | } | |
289 | ||
290 | mapping = dma_map_single(ksp->dev, skb->data, | |
291 | MAX_RXBUF_SIZE, | |
292 | DMA_FROM_DEVICE); | |
293 | if (unlikely(dma_mapping_error(ksp->dev, mapping))) { | |
294 | /* Failed to DMA map this SKB, try later */ | |
295 | dev_kfree_skb_irq(skb); | |
296 | ksp->rx_buffers[buff_n].skb = NULL; | |
297 | break; | |
298 | } | |
299 | ksp->rx_buffers[buff_n].dma_ptr = mapping; | |
300 | skb->dev = ksp->ndev; | |
301 | ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; | |
302 | ||
303 | /* Record this into the DMA ring */ | |
304 | ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); | |
305 | ksp->rx_ring[buff_n].length = | |
306 | cpu_to_le32(MAX_RXBUF_SIZE); | |
307 | ||
308 | wmb(); | |
309 | ||
310 | /* And give ownership over to the hardware */ | |
311 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | /* Maximum number of multicast addresses which the KS8695 HW supports */ | |
317 | #define KS8695_NR_ADDRESSES 16 | |
318 | ||
319 | /** | |
320 | * ks8695_init_partial_multicast - Init the mcast addr registers | |
321 | * @ksp: The device to initialise | |
322 | * @addr: The multicast address list to use | |
323 | * @nr_addr: The number of addresses in the list | |
324 | * | |
325 | * This routine is a helper for ks8695_set_multicast - it writes | |
326 | * the additional-address registers in the KS8695 ethernet device | |
327 | * and cleans up any others left behind. | |
328 | */ | |
329 | static void | |
330 | ks8695_init_partial_multicast(struct ks8695_priv *ksp, | |
3b9a7728 | 331 | struct net_device *ndev) |
7a3c66e2 DS |
332 | { |
333 | u32 low, high; | |
334 | int i; | |
3b9a7728 | 335 | struct dev_mc_list *dmi; |
7a3c66e2 | 336 | |
3b9a7728 JP |
337 | i = 0; |
338 | netdev_for_each_mc_addr(dmi, ndev) { | |
7a3c66e2 DS |
339 | /* Ran out of space in chip? */ |
340 | BUG_ON(i == KS8695_NR_ADDRESSES); | |
341 | ||
3b9a7728 JP |
342 | low = (dmi->dmi_addr[2] << 24) | (dmi->dmi_addr[3] << 16) | |
343 | (dmi->dmi_addr[4] << 8) | (dmi->dmi_addr[5]); | |
344 | high = (dmi->dmi_addr[0] << 8) | (dmi->dmi_addr[1]); | |
7a3c66e2 DS |
345 | |
346 | ks8695_writereg(ksp, KS8695_AAL_(i), low); | |
347 | ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); | |
3b9a7728 | 348 | i++; |
7a3c66e2 DS |
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 | 452 | /** |
ea93fd94 | 453 | * ks8695_rx - Receive packets called by NAPI poll method |
68d8287c | 454 | * @ksp: Private data for the KS8695 Ethernet |
ea93fd94 | 455 | * @budget: Number of packets allowed to process |
68d8287c | 456 | */ |
68d8287c | 457 | static int ks8695_rx(struct ks8695_priv *ksp, int budget) |
31b73ab3 | 458 | { |
68d8287c | 459 | struct net_device *ndev = ksp->ndev; |
7a3c66e2 DS |
460 | struct sk_buff *skb; |
461 | int buff_n; | |
462 | u32 flags; | |
463 | int pktlen; | |
31b73ab3 | 464 | int received = 0; |
7a3c66e2 DS |
465 | |
466 | buff_n = ksp->next_rx_desc_read; | |
31b73ab3 F |
467 | while (received < budget |
468 | && ksp->rx_buffers[buff_n].skb | |
469 | && (!(ksp->rx_ring[buff_n].status & | |
470 | cpu_to_le32(RDES_OWN)))) { | |
7a3c66e2 DS |
471 | rmb(); |
472 | flags = le32_to_cpu(ksp->rx_ring[buff_n].status); | |
ea93fd94 | 473 | |
7a3c66e2 DS |
474 | /* Found an SKB which we own, this means we |
475 | * received a packet | |
476 | */ | |
477 | if ((flags & (RDES_FS | RDES_LS)) != | |
478 | (RDES_FS | RDES_LS)) { | |
479 | /* This packet is not the first and | |
480 | * the last segment. Therefore it is | |
481 | * a "spanning" packet and we can't | |
482 | * handle it | |
483 | */ | |
484 | goto rx_failure; | |
485 | } | |
486 | ||
487 | if (flags & (RDES_ES | RDES_RE)) { | |
488 | /* It's an error packet */ | |
489 | ndev->stats.rx_errors++; | |
490 | if (flags & RDES_TL) | |
491 | ndev->stats.rx_length_errors++; | |
492 | if (flags & RDES_RF) | |
493 | ndev->stats.rx_length_errors++; | |
494 | if (flags & RDES_CE) | |
495 | ndev->stats.rx_crc_errors++; | |
496 | if (flags & RDES_RE) | |
497 | ndev->stats.rx_missed_errors++; | |
498 | ||
499 | goto rx_failure; | |
500 | } | |
501 | ||
502 | pktlen = flags & RDES_FLEN; | |
503 | pktlen -= 4; /* Drop the CRC */ | |
504 | ||
505 | /* Retrieve the sk_buff */ | |
506 | skb = ksp->rx_buffers[buff_n].skb; | |
507 | ||
508 | /* Clear it from the ring */ | |
509 | ksp->rx_buffers[buff_n].skb = NULL; | |
510 | ksp->rx_ring[buff_n].data_ptr = 0; | |
511 | ||
512 | /* Unmap the SKB */ | |
513 | dma_unmap_single(ksp->dev, | |
514 | ksp->rx_buffers[buff_n].dma_ptr, | |
515 | ksp->rx_buffers[buff_n].length, | |
516 | DMA_FROM_DEVICE); | |
517 | ||
518 | /* Relinquish the SKB to the network layer */ | |
519 | skb_put(skb, pktlen); | |
520 | skb->protocol = eth_type_trans(skb, ndev); | |
31b73ab3 | 521 | netif_receive_skb(skb); |
7a3c66e2 DS |
522 | |
523 | /* Record stats */ | |
7a3c66e2 DS |
524 | ndev->stats.rx_packets++; |
525 | ndev->stats.rx_bytes += pktlen; | |
526 | goto rx_finished; | |
527 | ||
528 | rx_failure: | |
529 | /* This ring entry is an error, but we can | |
530 | * re-use the skb | |
531 | */ | |
532 | /* Give the ring entry back to the hardware */ | |
533 | ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); | |
534 | rx_finished: | |
31b73ab3 | 535 | received++; |
31b73ab3 | 536 | buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; |
31b73ab3 | 537 | } |
ea93fd94 YY |
538 | |
539 | /* And note which RX descriptor we last did */ | |
540 | ksp->next_rx_desc_read = buff_n; | |
541 | ||
5c427ff9 | 542 | /* And refill the buffers */ |
543 | ks8695_refill_rxbuffers(ksp); | |
544 | ||
ea93fd94 | 545 | /* Kick the RX DMA engine, in case it became suspended */ |
5c427ff9 | 546 | ks8695_writereg(ksp, KS8695_DRSC, 0); |
ea93fd94 | 547 | |
31b73ab3 F |
548 | return received; |
549 | } | |
7a3c66e2 | 550 | |
68d8287c F |
551 | |
552 | /** | |
553 | * ks8695_poll - Receive packet by NAPI poll method | |
554 | * @ksp: Private data for the KS8695 Ethernet | |
555 | * @budget: The remaining number packets for network subsystem | |
556 | * | |
557 | * Invoked by the network core when it requests for new | |
558 | * packets from the driver | |
559 | */ | |
31b73ab3 F |
560 | static int ks8695_poll(struct napi_struct *napi, int budget) |
561 | { | |
562 | struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi); | |
68d8287c | 563 | unsigned long work_done; |
31b73ab3 | 564 | |
68d8287c F |
565 | unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN); |
566 | unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); | |
31b73ab3 | 567 | |
68d8287c | 568 | work_done = ks8695_rx(ksp, budget); |
31b73ab3 F |
569 | |
570 | if (work_done < budget) { | |
571 | unsigned long flags; | |
572 | spin_lock_irqsave(&ksp->rx_lock, flags); | |
b96b894c | 573 | __napi_complete(napi); |
31b73ab3 F |
574 | /*enable rx interrupt*/ |
575 | writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN); | |
31b73ab3 F |
576 | spin_unlock_irqrestore(&ksp->rx_lock, flags); |
577 | } | |
578 | return work_done; | |
7a3c66e2 DS |
579 | } |
580 | ||
581 | /** | |
582 | * ks8695_link_irq - Link change IRQ handler | |
583 | * @irq: The IRQ which went off (ignored) | |
584 | * @dev_id: The net_device for the interrupt | |
585 | * | |
586 | * The WAN interface can generate an IRQ when the link changes, | |
587 | * report this to the net layer and the user. | |
588 | */ | |
589 | static irqreturn_t | |
590 | ks8695_link_irq(int irq, void *dev_id) | |
591 | { | |
592 | struct net_device *ndev = (struct net_device *)dev_id; | |
593 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
594 | u32 ctrl; | |
595 | ||
596 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
597 | if (ctrl & WMC_WLS) { | |
598 | netif_carrier_on(ndev); | |
599 | if (netif_msg_link(ksp)) | |
600 | dev_info(ksp->dev, | |
601 | "%s: Link is now up (10%sMbps/%s-duplex)\n", | |
602 | ndev->name, | |
603 | (ctrl & WMC_WSS) ? "0" : "", | |
604 | (ctrl & WMC_WDS) ? "Full" : "Half"); | |
605 | } else { | |
606 | netif_carrier_off(ndev); | |
607 | if (netif_msg_link(ksp)) | |
608 | dev_info(ksp->dev, "%s: Link is now down.\n", | |
609 | ndev->name); | |
610 | } | |
611 | ||
612 | return IRQ_HANDLED; | |
613 | } | |
614 | ||
615 | ||
616 | /* KS8695 Device functions */ | |
617 | ||
618 | /** | |
619 | * ks8695_reset - Reset a KS8695 ethernet interface | |
620 | * @ksp: The interface to reset | |
621 | * | |
622 | * Perform an engine reset of the interface and re-program it | |
623 | * with sensible defaults. | |
624 | */ | |
625 | static void | |
626 | ks8695_reset(struct ks8695_priv *ksp) | |
627 | { | |
628 | int reset_timeout = watchdog; | |
629 | /* Issue the reset via the TX DMA control register */ | |
630 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); | |
631 | while (reset_timeout--) { | |
632 | if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) | |
633 | break; | |
634 | msleep(1); | |
635 | } | |
636 | ||
858b9ced | 637 | if (reset_timeout < 0) { |
7a3c66e2 DS |
638 | dev_crit(ksp->dev, |
639 | "Timeout waiting for DMA engines to reset\n"); | |
640 | /* And blithely carry on */ | |
641 | } | |
642 | ||
643 | /* Definitely wait long enough before attempting to program | |
644 | * the engines | |
645 | */ | |
646 | msleep(10); | |
647 | ||
648 | /* RX: unicast and broadcast */ | |
649 | ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); | |
650 | /* TX: pad and add CRC */ | |
651 | ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); | |
652 | } | |
653 | ||
654 | /** | |
655 | * ks8695_shutdown - Shut down a KS8695 ethernet interface | |
656 | * @ksp: The interface to shut down | |
657 | * | |
658 | * This disables packet RX/TX, cleans up IRQs, drains the rings, | |
659 | * and basically places the interface into a clean shutdown | |
660 | * state. | |
661 | */ | |
662 | static void | |
663 | ks8695_shutdown(struct ks8695_priv *ksp) | |
664 | { | |
665 | u32 ctrl; | |
666 | int buff_n; | |
667 | ||
668 | /* Disable packet transmission */ | |
669 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
670 | ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); | |
671 | ||
672 | /* Disable packet reception */ | |
673 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
674 | ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); | |
675 | ||
676 | /* Release the IRQs */ | |
677 | free_irq(ksp->rx_irq, ksp->ndev); | |
678 | free_irq(ksp->tx_irq, ksp->ndev); | |
679 | if (ksp->link_irq != -1) | |
680 | free_irq(ksp->link_irq, ksp->ndev); | |
681 | ||
682 | /* Throw away any pending TX packets */ | |
683 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
684 | if (ksp->tx_buffers[buff_n].skb) { | |
685 | /* Remove this SKB from the TX ring */ | |
686 | ksp->tx_ring[buff_n].owner = 0; | |
687 | ksp->tx_ring[buff_n].status = 0; | |
688 | ksp->tx_ring[buff_n].data_ptr = 0; | |
689 | ||
690 | /* Unmap and bin this SKB */ | |
691 | dma_unmap_single(ksp->dev, | |
692 | ksp->tx_buffers[buff_n].dma_ptr, | |
693 | ksp->tx_buffers[buff_n].length, | |
694 | DMA_TO_DEVICE); | |
695 | dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); | |
696 | ksp->tx_buffers[buff_n].skb = NULL; | |
697 | } | |
698 | } | |
699 | ||
700 | /* Purge the RX buffers */ | |
701 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
702 | if (ksp->rx_buffers[buff_n].skb) { | |
703 | /* Remove the SKB from the RX ring */ | |
704 | ksp->rx_ring[buff_n].status = 0; | |
705 | ksp->rx_ring[buff_n].data_ptr = 0; | |
706 | ||
707 | /* Unmap and bin the SKB */ | |
708 | dma_unmap_single(ksp->dev, | |
709 | ksp->rx_buffers[buff_n].dma_ptr, | |
710 | ksp->rx_buffers[buff_n].length, | |
711 | DMA_FROM_DEVICE); | |
712 | dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); | |
713 | ksp->rx_buffers[buff_n].skb = NULL; | |
714 | } | |
715 | } | |
716 | } | |
717 | ||
718 | ||
719 | /** | |
720 | * ks8695_setup_irq - IRQ setup helper function | |
721 | * @irq: The IRQ number to claim | |
722 | * @irq_name: The name to give the IRQ claimant | |
723 | * @handler: The function to call to handle the IRQ | |
724 | * @ndev: The net_device to pass in as the dev_id argument to the handler | |
725 | * | |
726 | * Return 0 on success. | |
727 | */ | |
728 | static int | |
729 | ks8695_setup_irq(int irq, const char *irq_name, | |
730 | irq_handler_t handler, struct net_device *ndev) | |
731 | { | |
732 | int ret; | |
733 | ||
734 | ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); | |
735 | ||
736 | if (ret) { | |
737 | dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); | |
738 | return ret; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | /** | |
745 | * ks8695_init_net - Initialise a KS8695 ethernet interface | |
746 | * @ksp: The interface to initialise | |
747 | * | |
748 | * This routine fills the RX ring, initialises the DMA engines, | |
749 | * allocates the IRQs and then starts the packet TX and RX | |
750 | * engines. | |
751 | */ | |
752 | static int | |
753 | ks8695_init_net(struct ks8695_priv *ksp) | |
754 | { | |
755 | int ret; | |
756 | u32 ctrl; | |
757 | ||
758 | ks8695_refill_rxbuffers(ksp); | |
759 | ||
760 | /* Initialise the DMA engines */ | |
761 | ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); | |
762 | ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); | |
763 | ||
764 | /* Request the IRQs */ | |
765 | ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, | |
766 | ks8695_rx_irq, ksp->ndev); | |
767 | if (ret) | |
768 | return ret; | |
769 | ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, | |
770 | ks8695_tx_irq, ksp->ndev); | |
771 | if (ret) | |
772 | return ret; | |
773 | if (ksp->link_irq != -1) { | |
774 | ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, | |
775 | ks8695_link_irq, ksp->ndev); | |
776 | if (ret) | |
777 | return ret; | |
778 | } | |
779 | ||
780 | /* Set up the ring indices */ | |
781 | ksp->next_rx_desc_read = 0; | |
782 | ksp->tx_ring_next_slot = 0; | |
783 | ksp->tx_ring_used = 0; | |
784 | ||
785 | /* Bring up transmission */ | |
786 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
787 | /* Enable packet transmission */ | |
788 | ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); | |
789 | ||
790 | /* Bring up the reception */ | |
791 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
792 | /* Enable packet reception */ | |
793 | ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); | |
794 | /* And start the DMA engine */ | |
795 | ks8695_writereg(ksp, KS8695_DRSC, 0); | |
796 | ||
797 | /* All done */ | |
798 | return 0; | |
799 | } | |
800 | ||
801 | /** | |
802 | * ks8695_release_device - HW resource release for KS8695 e-net | |
803 | * @ksp: The device to be freed | |
804 | * | |
805 | * This unallocates io memory regions, dma-coherent regions etc | |
806 | * which were allocated in ks8695_probe. | |
807 | */ | |
808 | static void | |
809 | ks8695_release_device(struct ks8695_priv *ksp) | |
810 | { | |
811 | /* Unmap the registers */ | |
812 | iounmap(ksp->io_regs); | |
813 | if (ksp->phyiface_regs) | |
814 | iounmap(ksp->phyiface_regs); | |
815 | ||
816 | /* And release the request */ | |
817 | release_resource(ksp->regs_req); | |
818 | kfree(ksp->regs_req); | |
819 | if (ksp->phyiface_req) { | |
820 | release_resource(ksp->phyiface_req); | |
821 | kfree(ksp->phyiface_req); | |
822 | } | |
823 | ||
824 | /* Free the ring buffers */ | |
825 | dma_free_coherent(ksp->dev, RING_DMA_SIZE, | |
826 | ksp->ring_base, ksp->ring_base_dma); | |
827 | } | |
828 | ||
829 | /* Ethtool support */ | |
830 | ||
831 | /** | |
832 | * ks8695_get_msglevel - Get the messages enabled for emission | |
833 | * @ndev: The network device to read from | |
834 | */ | |
835 | static u32 | |
836 | ks8695_get_msglevel(struct net_device *ndev) | |
837 | { | |
838 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
839 | ||
840 | return ksp->msg_enable; | |
841 | } | |
842 | ||
843 | /** | |
844 | * ks8695_set_msglevel - Set the messages enabled for emission | |
845 | * @ndev: The network device to configure | |
846 | * @value: The messages to set for emission | |
847 | */ | |
848 | static void | |
849 | ks8695_set_msglevel(struct net_device *ndev, u32 value) | |
850 | { | |
851 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
852 | ||
853 | ksp->msg_enable = value; | |
854 | } | |
855 | ||
856 | /** | |
857 | * ks8695_get_settings - Get device-specific settings. | |
858 | * @ndev: The network device to read settings from | |
859 | * @cmd: The ethtool structure to read into | |
860 | */ | |
861 | static int | |
862 | ks8695_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) | |
863 | { | |
864 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
865 | u32 ctrl; | |
866 | ||
867 | /* All ports on the KS8695 support these... */ | |
868 | cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
869 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
870 | SUPPORTED_TP | SUPPORTED_MII); | |
871 | cmd->transceiver = XCVR_INTERNAL; | |
872 | ||
873 | /* Port specific extras */ | |
874 | switch (ksp->dtype) { | |
875 | case KS8695_DTYPE_HPNA: | |
876 | cmd->phy_address = 0; | |
877 | /* not supported for HPNA */ | |
878 | cmd->autoneg = AUTONEG_DISABLE; | |
879 | ||
880 | /* BUG: Erm, dtype hpna implies no phy regs */ | |
881 | /* | |
882 | ctrl = readl(KS8695_MISC_VA + KS8695_HMC); | |
883 | cmd->speed = (ctrl & HMC_HSS) ? SPEED_100 : SPEED_10; | |
884 | cmd->duplex = (ctrl & HMC_HDS) ? DUPLEX_FULL : DUPLEX_HALF; | |
885 | */ | |
886 | return -EOPNOTSUPP; | |
887 | case KS8695_DTYPE_WAN: | |
888 | cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; | |
889 | cmd->port = PORT_MII; | |
890 | cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); | |
891 | cmd->phy_address = 0; | |
892 | ||
893 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
894 | if ((ctrl & WMC_WAND) == 0) { | |
895 | /* auto-negotiation is enabled */ | |
896 | cmd->advertising |= ADVERTISED_Autoneg; | |
897 | if (ctrl & WMC_WANA100F) | |
898 | cmd->advertising |= ADVERTISED_100baseT_Full; | |
899 | if (ctrl & WMC_WANA100H) | |
900 | cmd->advertising |= ADVERTISED_100baseT_Half; | |
901 | if (ctrl & WMC_WANA10F) | |
902 | cmd->advertising |= ADVERTISED_10baseT_Full; | |
903 | if (ctrl & WMC_WANA10H) | |
904 | cmd->advertising |= ADVERTISED_10baseT_Half; | |
905 | if (ctrl & WMC_WANAP) | |
906 | cmd->advertising |= ADVERTISED_Pause; | |
907 | cmd->autoneg = AUTONEG_ENABLE; | |
908 | ||
909 | cmd->speed = (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10; | |
910 | cmd->duplex = (ctrl & WMC_WDS) ? | |
911 | DUPLEX_FULL : DUPLEX_HALF; | |
912 | } else { | |
913 | /* auto-negotiation is disabled */ | |
914 | cmd->autoneg = AUTONEG_DISABLE; | |
915 | ||
916 | cmd->speed = (ctrl & WMC_WANF100) ? | |
917 | SPEED_100 : SPEED_10; | |
918 | cmd->duplex = (ctrl & WMC_WANFF) ? | |
919 | DUPLEX_FULL : DUPLEX_HALF; | |
920 | } | |
921 | break; | |
922 | case KS8695_DTYPE_LAN: | |
923 | return -EOPNOTSUPP; | |
924 | } | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | /** | |
930 | * ks8695_set_settings - Set device-specific settings. | |
931 | * @ndev: The network device to configure | |
932 | * @cmd: The settings to configure | |
933 | */ | |
934 | static int | |
935 | ks8695_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) | |
936 | { | |
937 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
938 | u32 ctrl; | |
939 | ||
940 | if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) | |
941 | return -EINVAL; | |
942 | if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) | |
943 | return -EINVAL; | |
944 | if (cmd->port != PORT_MII) | |
945 | return -EINVAL; | |
946 | if (cmd->transceiver != XCVR_INTERNAL) | |
947 | return -EINVAL; | |
948 | if ((cmd->autoneg != AUTONEG_DISABLE) && | |
949 | (cmd->autoneg != AUTONEG_ENABLE)) | |
950 | return -EINVAL; | |
951 | ||
952 | if (cmd->autoneg == AUTONEG_ENABLE) { | |
953 | if ((cmd->advertising & (ADVERTISED_10baseT_Half | | |
954 | ADVERTISED_10baseT_Full | | |
955 | ADVERTISED_100baseT_Half | | |
956 | ADVERTISED_100baseT_Full)) == 0) | |
957 | return -EINVAL; | |
958 | ||
959 | switch (ksp->dtype) { | |
960 | case KS8695_DTYPE_HPNA: | |
961 | /* HPNA does not support auto-negotiation. */ | |
962 | return -EINVAL; | |
963 | case KS8695_DTYPE_WAN: | |
964 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
965 | ||
966 | ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | | |
967 | WMC_WANA10F | WMC_WANA10H); | |
968 | if (cmd->advertising & ADVERTISED_100baseT_Full) | |
969 | ctrl |= WMC_WANA100F; | |
970 | if (cmd->advertising & ADVERTISED_100baseT_Half) | |
971 | ctrl |= WMC_WANA100H; | |
972 | if (cmd->advertising & ADVERTISED_10baseT_Full) | |
973 | ctrl |= WMC_WANA10F; | |
974 | if (cmd->advertising & ADVERTISED_10baseT_Half) | |
975 | ctrl |= WMC_WANA10H; | |
976 | ||
977 | /* force a re-negotiation */ | |
978 | ctrl |= WMC_WANR; | |
979 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
980 | break; | |
981 | case KS8695_DTYPE_LAN: | |
982 | return -EOPNOTSUPP; | |
983 | } | |
984 | ||
985 | } else { | |
986 | switch (ksp->dtype) { | |
987 | case KS8695_DTYPE_HPNA: | |
988 | /* BUG: dtype_hpna implies no phy registers */ | |
989 | /* | |
990 | ctrl = __raw_readl(KS8695_MISC_VA + KS8695_HMC); | |
991 | ||
992 | ctrl &= ~(HMC_HSS | HMC_HDS); | |
993 | if (cmd->speed == SPEED_100) | |
994 | ctrl |= HMC_HSS; | |
995 | if (cmd->duplex == DUPLEX_FULL) | |
996 | ctrl |= HMC_HDS; | |
997 | ||
998 | __raw_writel(ctrl, KS8695_MISC_VA + KS8695_HMC); | |
999 | */ | |
1000 | return -EOPNOTSUPP; | |
1001 | case KS8695_DTYPE_WAN: | |
1002 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1003 | ||
1004 | /* disable auto-negotiation */ | |
1005 | ctrl |= WMC_WAND; | |
1006 | ctrl &= ~(WMC_WANF100 | WMC_WANFF); | |
1007 | ||
1008 | if (cmd->speed == SPEED_100) | |
1009 | ctrl |= WMC_WANF100; | |
1010 | if (cmd->duplex == DUPLEX_FULL) | |
1011 | ctrl |= WMC_WANFF; | |
1012 | ||
1013 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1014 | break; | |
1015 | case KS8695_DTYPE_LAN: | |
1016 | return -EOPNOTSUPP; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | /** | |
1024 | * ks8695_nwayreset - Restart the autonegotiation on the port. | |
1025 | * @ndev: The network device to restart autoneotiation on | |
1026 | */ | |
1027 | static int | |
1028 | ks8695_nwayreset(struct net_device *ndev) | |
1029 | { | |
1030 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1031 | u32 ctrl; | |
1032 | ||
1033 | switch (ksp->dtype) { | |
1034 | case KS8695_DTYPE_HPNA: | |
1035 | /* No phy means no autonegotiation on hpna */ | |
1036 | return -EINVAL; | |
1037 | case KS8695_DTYPE_WAN: | |
1038 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1039 | ||
1040 | if ((ctrl & WMC_WAND) == 0) | |
1041 | writel(ctrl | WMC_WANR, | |
1042 | ksp->phyiface_regs + KS8695_WMC); | |
1043 | else | |
1044 | /* auto-negotiation not enabled */ | |
1045 | return -EINVAL; | |
1046 | break; | |
1047 | case KS8695_DTYPE_LAN: | |
1048 | return -EOPNOTSUPP; | |
1049 | } | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | /** | |
1055 | * ks8695_get_link - Retrieve link status of network interface | |
1056 | * @ndev: The network interface to retrive the link status of. | |
1057 | */ | |
1058 | static u32 | |
1059 | ks8695_get_link(struct net_device *ndev) | |
1060 | { | |
1061 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1062 | u32 ctrl; | |
1063 | ||
1064 | switch (ksp->dtype) { | |
1065 | case KS8695_DTYPE_HPNA: | |
1066 | /* HPNA always has link */ | |
1067 | return 1; | |
1068 | case KS8695_DTYPE_WAN: | |
1069 | /* WAN we can read the PHY for */ | |
1070 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1071 | return ctrl & WMC_WLS; | |
1072 | case KS8695_DTYPE_LAN: | |
1073 | return -EOPNOTSUPP; | |
1074 | } | |
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | /** | |
1079 | * ks8695_get_pause - Retrieve network pause/flow-control advertising | |
1080 | * @ndev: The device to retrieve settings from | |
1081 | * @param: The structure to fill out with the information | |
1082 | */ | |
1083 | static void | |
1084 | ks8695_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) | |
1085 | { | |
1086 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1087 | u32 ctrl; | |
1088 | ||
1089 | switch (ksp->dtype) { | |
1090 | case KS8695_DTYPE_HPNA: | |
1091 | /* No phy link on hpna to configure */ | |
1092 | return; | |
1093 | case KS8695_DTYPE_WAN: | |
1094 | ctrl = readl(ksp->phyiface_regs + KS8695_WMC); | |
1095 | ||
1096 | /* advertise Pause */ | |
1097 | param->autoneg = (ctrl & WMC_WANAP); | |
1098 | ||
1099 | /* current Rx Flow-control */ | |
1100 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1101 | param->rx_pause = (ctrl & DRXC_RFCE); | |
1102 | ||
1103 | /* current Tx Flow-control */ | |
1104 | ctrl = ks8695_readreg(ksp, KS8695_DTXC); | |
1105 | param->tx_pause = (ctrl & DTXC_TFCE); | |
1106 | break; | |
1107 | case KS8695_DTYPE_LAN: | |
1108 | /* The LAN's "phy" is a direct-attached switch */ | |
1109 | return; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * ks8695_set_pause - Configure pause/flow-control | |
1115 | * @ndev: The device to configure | |
1116 | * @param: The pause parameters to set | |
1117 | * | |
1118 | * TODO: Implement this | |
1119 | */ | |
1120 | static int | |
1121 | ks8695_set_pause(struct net_device *ndev, struct ethtool_pauseparam *param) | |
1122 | { | |
1123 | return -EOPNOTSUPP; | |
1124 | } | |
1125 | ||
1126 | /** | |
1127 | * ks8695_get_drvinfo - Retrieve driver information | |
1128 | * @ndev: The network device to retrieve info about | |
1129 | * @info: The info structure to fill out. | |
1130 | */ | |
1131 | static void | |
1132 | ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) | |
1133 | { | |
1134 | strlcpy(info->driver, MODULENAME, sizeof(info->driver)); | |
1135 | strlcpy(info->version, MODULEVERSION, sizeof(info->version)); | |
c2313557 | 1136 | strlcpy(info->bus_info, dev_name(ndev->dev.parent), |
7a3c66e2 DS |
1137 | sizeof(info->bus_info)); |
1138 | } | |
1139 | ||
0fc0b732 | 1140 | static const struct ethtool_ops ks8695_ethtool_ops = { |
7a3c66e2 DS |
1141 | .get_msglevel = ks8695_get_msglevel, |
1142 | .set_msglevel = ks8695_set_msglevel, | |
1143 | .get_settings = ks8695_get_settings, | |
1144 | .set_settings = ks8695_set_settings, | |
1145 | .nway_reset = ks8695_nwayreset, | |
1146 | .get_link = ks8695_get_link, | |
1147 | .get_pauseparam = ks8695_get_pause, | |
1148 | .set_pauseparam = ks8695_set_pause, | |
1149 | .get_drvinfo = ks8695_get_drvinfo, | |
1150 | }; | |
1151 | ||
1152 | /* Network device interface functions */ | |
1153 | ||
1154 | /** | |
1155 | * ks8695_set_mac - Update MAC in net dev and HW | |
1156 | * @ndev: The network device to update | |
1157 | * @addr: The new MAC address to set | |
1158 | */ | |
1159 | static int | |
1160 | ks8695_set_mac(struct net_device *ndev, void *addr) | |
1161 | { | |
1162 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1163 | struct sockaddr *address = addr; | |
1164 | ||
1165 | if (!is_valid_ether_addr(address->sa_data)) | |
1166 | return -EADDRNOTAVAIL; | |
1167 | ||
1168 | memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); | |
1169 | ||
1170 | ks8695_update_mac(ksp); | |
1171 | ||
1172 | dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", | |
1173 | ndev->name, ndev->dev_addr); | |
1174 | ||
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * ks8695_set_multicast - Set up the multicast behaviour of the interface | |
1180 | * @ndev: The net_device to configure | |
1181 | * | |
1182 | * This routine, called by the net layer, configures promiscuity | |
1183 | * and multicast reception behaviour for the interface. | |
1184 | */ | |
1185 | static void | |
1186 | ks8695_set_multicast(struct net_device *ndev) | |
1187 | { | |
1188 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1189 | u32 ctrl; | |
1190 | ||
1191 | ctrl = ks8695_readreg(ksp, KS8695_DRXC); | |
1192 | ||
1193 | if (ndev->flags & IFF_PROMISC) { | |
1194 | /* enable promiscuous mode */ | |
1195 | ctrl |= DRXC_RA; | |
1196 | } else if (ndev->flags & ~IFF_PROMISC) { | |
1197 | /* disable promiscuous mode */ | |
1198 | ctrl &= ~DRXC_RA; | |
1199 | } | |
1200 | ||
1201 | if (ndev->flags & IFF_ALLMULTI) { | |
1202 | /* enable all multicast mode */ | |
1203 | ctrl |= DRXC_RM; | |
4cd24eaf | 1204 | } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) { |
7a3c66e2 DS |
1205 | /* more specific multicast addresses than can be |
1206 | * handled in hardware | |
1207 | */ | |
1208 | ctrl |= DRXC_RM; | |
1209 | } else { | |
1210 | /* enable specific multicasts */ | |
1211 | ctrl &= ~DRXC_RM; | |
3b9a7728 | 1212 | ks8695_init_partial_multicast(ksp, ndev); |
7a3c66e2 DS |
1213 | } |
1214 | ||
1215 | ks8695_writereg(ksp, KS8695_DRXC, ctrl); | |
1216 | } | |
1217 | ||
1218 | /** | |
1219 | * ks8695_timeout - Handle a network tx/rx timeout. | |
1220 | * @ndev: The net_device which timed out. | |
1221 | * | |
1222 | * A network transaction timed out, reset the device. | |
1223 | */ | |
1224 | static void | |
1225 | ks8695_timeout(struct net_device *ndev) | |
1226 | { | |
1227 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1228 | ||
1229 | netif_stop_queue(ndev); | |
1230 | ks8695_shutdown(ksp); | |
1231 | ||
1232 | ks8695_reset(ksp); | |
1233 | ||
1234 | ks8695_update_mac(ksp); | |
1235 | ||
1236 | /* We ignore the return from this since it managed to init | |
1237 | * before it probably will be okay to init again. | |
1238 | */ | |
1239 | ks8695_init_net(ksp); | |
1240 | ||
1241 | /* Reconfigure promiscuity etc */ | |
1242 | ks8695_set_multicast(ndev); | |
1243 | ||
1244 | /* And start the TX queue once more */ | |
1245 | netif_start_queue(ndev); | |
1246 | } | |
1247 | ||
1248 | /** | |
1249 | * ks8695_start_xmit - Start a packet transmission | |
1250 | * @skb: The packet to transmit | |
1251 | * @ndev: The network device to send the packet on | |
1252 | * | |
1253 | * This routine, called by the net layer, takes ownership of the | |
1254 | * sk_buff and adds it to the TX ring. It then kicks the TX DMA | |
1255 | * engine to ensure transmission begins. | |
1256 | */ | |
1257 | static int | |
1258 | ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1259 | { | |
1260 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1261 | int buff_n; | |
1262 | dma_addr_t dmap; | |
1263 | ||
1264 | spin_lock_irq(&ksp->txq_lock); | |
1265 | ||
1266 | if (ksp->tx_ring_used == MAX_TX_DESC) { | |
1267 | /* Somehow we got entered when we have no room */ | |
1268 | spin_unlock_irq(&ksp->txq_lock); | |
1269 | return NETDEV_TX_BUSY; | |
1270 | } | |
1271 | ||
1272 | buff_n = ksp->tx_ring_next_slot; | |
1273 | ||
1274 | BUG_ON(ksp->tx_buffers[buff_n].skb); | |
1275 | ||
1276 | dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); | |
1277 | if (unlikely(dma_mapping_error(ksp->dev, dmap))) { | |
1278 | /* Failed to DMA map this SKB, give it back for now */ | |
1279 | spin_unlock_irq(&ksp->txq_lock); | |
1280 | dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ | |
1281 | "transmission, trying later\n", ndev->name); | |
1282 | return NETDEV_TX_BUSY; | |
1283 | } | |
1284 | ||
1285 | ksp->tx_buffers[buff_n].dma_ptr = dmap; | |
1286 | /* Mapped okay, store the buffer pointer and length for later */ | |
1287 | ksp->tx_buffers[buff_n].skb = skb; | |
1288 | ksp->tx_buffers[buff_n].length = skb->len; | |
1289 | ||
1290 | /* Fill out the TX descriptor */ | |
1291 | ksp->tx_ring[buff_n].data_ptr = | |
1292 | cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); | |
1293 | ksp->tx_ring[buff_n].status = | |
1294 | cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | | |
1295 | (skb->len & TDES_TBS)); | |
1296 | ||
1297 | wmb(); | |
1298 | ||
1299 | /* Hand it over to the hardware */ | |
1300 | ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); | |
1301 | ||
1302 | if (++ksp->tx_ring_used == MAX_TX_DESC) | |
1303 | netif_stop_queue(ndev); | |
1304 | ||
1305 | ndev->trans_start = jiffies; | |
1306 | ||
1307 | /* Kick the TX DMA in case it decided to go IDLE */ | |
1308 | ks8695_writereg(ksp, KS8695_DTSC, 0); | |
1309 | ||
1310 | /* And update the next ring slot */ | |
1311 | ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; | |
1312 | ||
1313 | spin_unlock_irq(&ksp->txq_lock); | |
1314 | return NETDEV_TX_OK; | |
1315 | } | |
1316 | ||
1317 | /** | |
1318 | * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface | |
1319 | * @ndev: The net_device to stop | |
1320 | * | |
1321 | * This disables the TX queue and cleans up a KS8695 ethernet | |
1322 | * device. | |
1323 | */ | |
1324 | static int | |
1325 | ks8695_stop(struct net_device *ndev) | |
1326 | { | |
1327 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1328 | ||
1329 | netif_stop_queue(ndev); | |
68d8287c | 1330 | napi_disable(&ksp->napi); |
7a3c66e2 DS |
1331 | |
1332 | ks8695_shutdown(ksp); | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | /** | |
1338 | * ks8695_open - Open (bring up) a KS8695 ethernet interface | |
1339 | * @ndev: The net_device to open | |
1340 | * | |
1341 | * This resets, configures the MAC, initialises the RX ring and | |
1342 | * DMA engines and starts the TX queue for a KS8695 ethernet | |
1343 | * device. | |
1344 | */ | |
1345 | static int | |
1346 | ks8695_open(struct net_device *ndev) | |
1347 | { | |
1348 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1349 | int ret; | |
1350 | ||
1351 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1352 | return -EADDRNOTAVAIL; | |
1353 | ||
1354 | ks8695_reset(ksp); | |
1355 | ||
1356 | ks8695_update_mac(ksp); | |
1357 | ||
1358 | ret = ks8695_init_net(ksp); | |
1359 | if (ret) { | |
1360 | ks8695_shutdown(ksp); | |
1361 | return ret; | |
1362 | } | |
1363 | ||
68d8287c | 1364 | napi_enable(&ksp->napi); |
7a3c66e2 DS |
1365 | netif_start_queue(ndev); |
1366 | ||
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | /* Platform device driver */ | |
1371 | ||
1372 | /** | |
1373 | * ks8695_init_switch - Init LAN switch to known good defaults. | |
1374 | * @ksp: The device to initialise | |
1375 | * | |
1376 | * This initialises the LAN switch in the KS8695 to a known-good | |
1377 | * set of defaults. | |
1378 | */ | |
1379 | static void __devinit | |
1380 | ks8695_init_switch(struct ks8695_priv *ksp) | |
1381 | { | |
1382 | u32 ctrl; | |
1383 | ||
1384 | /* Default value for SEC0 according to datasheet */ | |
1385 | ctrl = 0x40819e00; | |
1386 | ||
1387 | /* LED0 = Speed LED1 = Link/Activity */ | |
1388 | ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); | |
1389 | ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); | |
1390 | ||
1391 | /* Enable Switch */ | |
1392 | ctrl |= SEC0_ENABLE; | |
1393 | ||
1394 | writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); | |
1395 | ||
1396 | /* Defaults for SEC1 */ | |
1397 | writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); | |
1398 | } | |
1399 | ||
1400 | /** | |
1401 | * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults | |
1402 | * @ksp: The device to initialise | |
1403 | * | |
1404 | * This initialises a KS8695's WAN phy to sensible values for | |
1405 | * autonegotiation etc. | |
1406 | */ | |
1407 | static void __devinit | |
1408 | ks8695_init_wan_phy(struct ks8695_priv *ksp) | |
1409 | { | |
1410 | u32 ctrl; | |
1411 | ||
1412 | /* Support auto-negotiation */ | |
1413 | ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | | |
1414 | WMC_WANA10F | WMC_WANA10H); | |
1415 | ||
1416 | /* LED0 = Activity , LED1 = Link */ | |
1417 | ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); | |
1418 | ||
1419 | /* Restart Auto-negotiation */ | |
1420 | ctrl |= WMC_WANR; | |
1421 | ||
1422 | writel(ctrl, ksp->phyiface_regs + KS8695_WMC); | |
1423 | ||
1424 | writel(0, ksp->phyiface_regs + KS8695_WPPM); | |
1425 | writel(0, ksp->phyiface_regs + KS8695_PPS); | |
1426 | } | |
1427 | ||
1428 | static const struct net_device_ops ks8695_netdev_ops = { | |
1429 | .ndo_open = ks8695_open, | |
1430 | .ndo_stop = ks8695_stop, | |
1431 | .ndo_start_xmit = ks8695_start_xmit, | |
1432 | .ndo_tx_timeout = ks8695_timeout, | |
1433 | .ndo_set_mac_address = ks8695_set_mac, | |
52255bbe | 1434 | .ndo_validate_addr = eth_validate_addr, |
7a3c66e2 DS |
1435 | .ndo_set_multicast_list = ks8695_set_multicast, |
1436 | }; | |
1437 | ||
1438 | /** | |
1439 | * ks8695_probe - Probe and initialise a KS8695 ethernet interface | |
1440 | * @pdev: The platform device to probe | |
1441 | * | |
1442 | * Initialise a KS8695 ethernet device from platform data. | |
1443 | * | |
1444 | * This driver requires at least one IORESOURCE_MEM for the | |
1445 | * registers and two IORESOURCE_IRQ for the RX and TX IRQs | |
1446 | * respectively. It can optionally take an additional | |
1447 | * IORESOURCE_MEM for the switch or phy in the case of the lan or | |
1448 | * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan | |
1449 | * port. | |
1450 | */ | |
1451 | static int __devinit | |
1452 | ks8695_probe(struct platform_device *pdev) | |
1453 | { | |
1454 | struct ks8695_priv *ksp; | |
1455 | struct net_device *ndev; | |
1456 | struct resource *regs_res, *phyiface_res; | |
1457 | struct resource *rxirq_res, *txirq_res, *linkirq_res; | |
1458 | int ret = 0; | |
1459 | int buff_n; | |
1460 | u32 machigh, maclow; | |
1461 | ||
1462 | /* Initialise a net_device */ | |
1463 | ndev = alloc_etherdev(sizeof(struct ks8695_priv)); | |
1464 | if (!ndev) { | |
1465 | dev_err(&pdev->dev, "could not allocate device.\n"); | |
1466 | return -ENOMEM; | |
1467 | } | |
1468 | ||
1469 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1470 | ||
1471 | dev_dbg(&pdev->dev, "ks8695_probe() called\n"); | |
1472 | ||
1473 | /* Configure our private structure a little */ | |
1474 | ksp = netdev_priv(ndev); | |
1475 | memset(ksp, 0, sizeof(struct ks8695_priv)); | |
1476 | ||
1477 | ksp->dev = &pdev->dev; | |
1478 | ksp->ndev = ndev; | |
1479 | ksp->msg_enable = NETIF_MSG_LINK; | |
1480 | ||
1481 | /* Retrieve resources */ | |
1482 | regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1483 | phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1484 | ||
1485 | rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1486 | txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); | |
1487 | linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); | |
1488 | ||
1489 | if (!(regs_res && rxirq_res && txirq_res)) { | |
1490 | dev_err(ksp->dev, "insufficient resources\n"); | |
1491 | ret = -ENOENT; | |
1492 | goto failure; | |
1493 | } | |
1494 | ||
1495 | ksp->regs_req = request_mem_region(regs_res->start, | |
1496 | resource_size(regs_res), | |
1497 | pdev->name); | |
1498 | ||
1499 | if (!ksp->regs_req) { | |
1500 | dev_err(ksp->dev, "cannot claim register space\n"); | |
1501 | ret = -EIO; | |
1502 | goto failure; | |
1503 | } | |
1504 | ||
1505 | ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); | |
1506 | ||
1507 | if (!ksp->io_regs) { | |
1508 | dev_err(ksp->dev, "failed to ioremap registers\n"); | |
1509 | ret = -EINVAL; | |
1510 | goto failure; | |
1511 | } | |
1512 | ||
1513 | if (phyiface_res) { | |
1514 | ksp->phyiface_req = | |
1515 | request_mem_region(phyiface_res->start, | |
1516 | resource_size(phyiface_res), | |
1517 | phyiface_res->name); | |
1518 | ||
1519 | if (!ksp->phyiface_req) { | |
1520 | dev_err(ksp->dev, | |
1521 | "cannot claim switch register space\n"); | |
1522 | ret = -EIO; | |
1523 | goto failure; | |
1524 | } | |
1525 | ||
1526 | ksp->phyiface_regs = ioremap(phyiface_res->start, | |
1527 | resource_size(phyiface_res)); | |
1528 | ||
1529 | if (!ksp->phyiface_regs) { | |
1530 | dev_err(ksp->dev, | |
1531 | "failed to ioremap switch registers\n"); | |
1532 | ret = -EINVAL; | |
1533 | goto failure; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | ksp->rx_irq = rxirq_res->start; | |
1538 | ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; | |
1539 | ksp->tx_irq = txirq_res->start; | |
1540 | ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; | |
1541 | ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); | |
1542 | ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? | |
1543 | linkirq_res->name : "Ethernet Link"; | |
1544 | ||
1545 | /* driver system setup */ | |
1546 | ndev->netdev_ops = &ks8695_netdev_ops; | |
1547 | SET_ETHTOOL_OPS(ndev, &ks8695_ethtool_ops); | |
1548 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); | |
1549 | ||
68d8287c | 1550 | netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT); |
31b73ab3 | 1551 | |
7a3c66e2 DS |
1552 | /* Retrieve the default MAC addr from the chip. */ |
1553 | /* The bootloader should have left it in there for us. */ | |
1554 | ||
1555 | machigh = ks8695_readreg(ksp, KS8695_MAH); | |
1556 | maclow = ks8695_readreg(ksp, KS8695_MAL); | |
1557 | ||
1558 | ndev->dev_addr[0] = (machigh >> 8) & 0xFF; | |
1559 | ndev->dev_addr[1] = machigh & 0xFF; | |
1560 | ndev->dev_addr[2] = (maclow >> 24) & 0xFF; | |
1561 | ndev->dev_addr[3] = (maclow >> 16) & 0xFF; | |
1562 | ndev->dev_addr[4] = (maclow >> 8) & 0xFF; | |
1563 | ndev->dev_addr[5] = maclow & 0xFF; | |
1564 | ||
1565 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1566 | dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " | |
1567 | "set using ifconfig\n", ndev->name); | |
1568 | ||
1569 | /* In order to be efficient memory-wise, we allocate both | |
1570 | * rings in one go. | |
1571 | */ | |
1572 | ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, | |
1573 | &ksp->ring_base_dma, GFP_KERNEL); | |
1574 | if (!ksp->ring_base) { | |
1575 | ret = -ENOMEM; | |
1576 | goto failure; | |
1577 | } | |
1578 | ||
1579 | /* Specify the TX DMA ring buffer */ | |
1580 | ksp->tx_ring = ksp->ring_base; | |
1581 | ksp->tx_ring_dma = ksp->ring_base_dma; | |
1582 | ||
1583 | /* And initialise the queue's lock */ | |
1584 | spin_lock_init(&ksp->txq_lock); | |
31b73ab3 | 1585 | spin_lock_init(&ksp->rx_lock); |
7a3c66e2 DS |
1586 | |
1587 | /* Specify the RX DMA ring buffer */ | |
1588 | ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; | |
1589 | ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; | |
1590 | ||
1591 | /* Zero the descriptor rings */ | |
1592 | memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); | |
1593 | memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); | |
1594 | ||
1595 | /* Build the rings */ | |
1596 | for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { | |
1597 | ksp->tx_ring[buff_n].next_desc = | |
1598 | cpu_to_le32(ksp->tx_ring_dma + | |
1599 | (sizeof(struct tx_ring_desc) * | |
1600 | ((buff_n + 1) & MAX_TX_DESC_MASK))); | |
1601 | } | |
1602 | ||
1603 | for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { | |
1604 | ksp->rx_ring[buff_n].next_desc = | |
1605 | cpu_to_le32(ksp->rx_ring_dma + | |
1606 | (sizeof(struct rx_ring_desc) * | |
1607 | ((buff_n + 1) & MAX_RX_DESC_MASK))); | |
1608 | } | |
1609 | ||
1610 | /* Initialise the port (physically) */ | |
1611 | if (ksp->phyiface_regs && ksp->link_irq == -1) { | |
1612 | ks8695_init_switch(ksp); | |
1613 | ksp->dtype = KS8695_DTYPE_LAN; | |
1614 | } else if (ksp->phyiface_regs && ksp->link_irq != -1) { | |
1615 | ks8695_init_wan_phy(ksp); | |
1616 | ksp->dtype = KS8695_DTYPE_WAN; | |
1617 | } else { | |
1618 | /* No initialisation since HPNA does not have a PHY */ | |
1619 | ksp->dtype = KS8695_DTYPE_HPNA; | |
1620 | } | |
1621 | ||
1622 | /* And bring up the net_device with the net core */ | |
1623 | platform_set_drvdata(pdev, ndev); | |
1624 | ret = register_netdev(ndev); | |
1625 | ||
1626 | if (ret == 0) { | |
1627 | dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", | |
1628 | ks8695_port_type(ksp), ndev->dev_addr); | |
1629 | } else { | |
1630 | /* Report the failure to register the net_device */ | |
1631 | dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); | |
1632 | goto failure; | |
1633 | } | |
1634 | ||
1635 | /* All is well */ | |
1636 | return 0; | |
1637 | ||
1638 | /* Error exit path */ | |
1639 | failure: | |
1640 | ks8695_release_device(ksp); | |
1641 | free_netdev(ndev); | |
1642 | ||
1643 | return ret; | |
1644 | } | |
1645 | ||
1646 | /** | |
1647 | * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. | |
1648 | * @pdev: The device to suspend | |
1649 | * @state: The suspend state | |
1650 | * | |
1651 | * This routine detaches and shuts down a KS8695 ethernet device. | |
1652 | */ | |
1653 | static int | |
1654 | ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
1655 | { | |
1656 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1657 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1658 | ||
1659 | ksp->in_suspend = 1; | |
1660 | ||
1661 | if (netif_running(ndev)) { | |
1662 | netif_device_detach(ndev); | |
1663 | ks8695_shutdown(ksp); | |
1664 | } | |
1665 | ||
1666 | return 0; | |
1667 | } | |
1668 | ||
1669 | /** | |
1670 | * ks8695_drv_resume - Resume a KS8695 ethernet platform device. | |
1671 | * @pdev: The device to resume | |
1672 | * | |
1673 | * This routine re-initialises and re-attaches a KS8695 ethernet | |
1674 | * device. | |
1675 | */ | |
1676 | static int | |
1677 | ks8695_drv_resume(struct platform_device *pdev) | |
1678 | { | |
1679 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1680 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1681 | ||
1682 | if (netif_running(ndev)) { | |
1683 | ks8695_reset(ksp); | |
1684 | ks8695_init_net(ksp); | |
1685 | ks8695_set_multicast(ndev); | |
1686 | netif_device_attach(ndev); | |
1687 | } | |
1688 | ||
1689 | ksp->in_suspend = 0; | |
1690 | ||
1691 | return 0; | |
1692 | } | |
1693 | ||
1694 | /** | |
1695 | * ks8695_drv_remove - Remove a KS8695 net device on driver unload. | |
1696 | * @pdev: The platform device to remove | |
1697 | * | |
1698 | * This unregisters and releases a KS8695 ethernet device. | |
1699 | */ | |
1700 | static int __devexit | |
1701 | ks8695_drv_remove(struct platform_device *pdev) | |
1702 | { | |
1703 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1704 | struct ks8695_priv *ksp = netdev_priv(ndev); | |
1705 | ||
1706 | platform_set_drvdata(pdev, NULL); | |
31b73ab3 | 1707 | netif_napi_del(&ksp->napi); |
7a3c66e2 DS |
1708 | |
1709 | unregister_netdev(ndev); | |
1710 | ks8695_release_device(ksp); | |
1711 | free_netdev(ndev); | |
1712 | ||
1713 | dev_dbg(&pdev->dev, "released and freed device\n"); | |
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static struct platform_driver ks8695_driver = { | |
1718 | .driver = { | |
1719 | .name = MODULENAME, | |
1720 | .owner = THIS_MODULE, | |
1721 | }, | |
1722 | .probe = ks8695_probe, | |
1723 | .remove = __devexit_p(ks8695_drv_remove), | |
1724 | .suspend = ks8695_drv_suspend, | |
1725 | .resume = ks8695_drv_resume, | |
1726 | }; | |
1727 | ||
1728 | /* Module interface */ | |
1729 | ||
1730 | static int __init | |
1731 | ks8695_init(void) | |
1732 | { | |
1733 | printk(KERN_INFO "%s Ethernet driver, V%s\n", | |
1734 | MODULENAME, MODULEVERSION); | |
1735 | ||
1736 | return platform_driver_register(&ks8695_driver); | |
1737 | } | |
1738 | ||
1739 | static void __exit | |
1740 | ks8695_cleanup(void) | |
1741 | { | |
1742 | platform_driver_unregister(&ks8695_driver); | |
1743 | } | |
1744 | ||
1745 | module_init(ks8695_init); | |
1746 | module_exit(ks8695_cleanup); | |
1747 | ||
1748 | MODULE_AUTHOR("Simtec Electronics") | |
1749 | MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); | |
1750 | MODULE_LICENSE("GPL"); | |
1751 | MODULE_ALIAS("platform:" MODULENAME); | |
1752 | ||
1753 | module_param(watchdog, int, 0400); | |
1754 | MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); |