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3320eae5 | 1 | /* drivers/net/ks8851.c |
3ba81f3e BD |
2 | * |
3 | * Copyright 2009 Simtec Electronics | |
4 | * http://www.simtec.co.uk/ | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
0dc7d2b3 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
3ba81f3e BD |
14 | #define DEBUG |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/netdevice.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/ethtool.h> | |
21 | #include <linux/cache.h> | |
22 | #include <linux/crc32.h> | |
23 | #include <linux/mii.h> | |
24 | ||
25 | #include <linux/spi/spi.h> | |
26 | ||
27 | #include "ks8851.h" | |
28 | ||
29 | /** | |
30 | * struct ks8851_rxctrl - KS8851 driver rx control | |
31 | * @mchash: Multicast hash-table data. | |
32 | * @rxcr1: KS_RXCR1 register setting | |
33 | * @rxcr2: KS_RXCR2 register setting | |
34 | * | |
35 | * Representation of the settings needs to control the receive filtering | |
36 | * such as the multicast hash-filter and the receive register settings. This | |
37 | * is used to make the job of working out if the receive settings change and | |
38 | * then issuing the new settings to the worker that will send the necessary | |
39 | * commands. | |
40 | */ | |
41 | struct ks8851_rxctrl { | |
42 | u16 mchash[4]; | |
43 | u16 rxcr1; | |
44 | u16 rxcr2; | |
45 | }; | |
46 | ||
47 | /** | |
48 | * union ks8851_tx_hdr - tx header data | |
49 | * @txb: The header as bytes | |
50 | * @txw: The header as 16bit, little-endian words | |
51 | * | |
52 | * A dual representation of the tx header data to allow | |
53 | * access to individual bytes, and to allow 16bit accesses | |
54 | * with 16bit alignment. | |
55 | */ | |
56 | union ks8851_tx_hdr { | |
57 | u8 txb[6]; | |
58 | __le16 txw[3]; | |
59 | }; | |
60 | ||
61 | /** | |
62 | * struct ks8851_net - KS8851 driver private data | |
63 | * @netdev: The network device we're bound to | |
64 | * @spidev: The spi device we're bound to. | |
65 | * @lock: Lock to ensure that the device is not accessed when busy. | |
66 | * @statelock: Lock on this structure for tx list. | |
67 | * @mii: The MII state information for the mii calls. | |
68 | * @rxctrl: RX settings for @rxctrl_work. | |
69 | * @tx_work: Work queue for tx packets | |
70 | * @irq_work: Work queue for servicing interrupts | |
71 | * @rxctrl_work: Work queue for updating RX mode and multicast lists | |
72 | * @txq: Queue of packets for transmission. | |
73 | * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. | |
74 | * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. | |
75 | * @txh: Space for generating packet TX header in DMA-able data | |
76 | * @rxd: Space for receiving SPI data, in DMA-able space. | |
77 | * @txd: Space for transmitting SPI data, in DMA-able space. | |
78 | * @msg_enable: The message flags controlling driver output (see ethtool). | |
79 | * @fid: Incrementing frame id tag. | |
80 | * @rc_ier: Cached copy of KS_IER. | |
7d997466 | 81 | * @rc_ccr: Cached copy of KS_CCR. |
3ba81f3e | 82 | * @rc_rxqcr: Cached copy of KS_RXQCR. |
7d997466 | 83 | * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom |
3ba81f3e BD |
84 | * |
85 | * The @lock ensures that the chip is protected when certain operations are | |
86 | * in progress. When the read or write packet transfer is in progress, most | |
87 | * of the chip registers are not ccessible until the transfer is finished and | |
88 | * the DMA has been de-asserted. | |
89 | * | |
90 | * The @statelock is used to protect information in the structure which may | |
91 | * need to be accessed via several sources, such as the network driver layer | |
92 | * or one of the work queues. | |
93 | * | |
94 | * We align the buffers we may use for rx/tx to ensure that if the SPI driver | |
95 | * wants to DMA map them, it will not have any problems with data the driver | |
96 | * modifies. | |
97 | */ | |
98 | struct ks8851_net { | |
99 | struct net_device *netdev; | |
100 | struct spi_device *spidev; | |
101 | struct mutex lock; | |
102 | spinlock_t statelock; | |
103 | ||
104 | union ks8851_tx_hdr txh ____cacheline_aligned; | |
105 | u8 rxd[8]; | |
106 | u8 txd[8]; | |
107 | ||
108 | u32 msg_enable ____cacheline_aligned; | |
109 | u16 tx_space; | |
110 | u8 fid; | |
111 | ||
112 | u16 rc_ier; | |
113 | u16 rc_rxqcr; | |
7d997466 SJ |
114 | u16 rc_ccr; |
115 | u16 eeprom_size; | |
3ba81f3e BD |
116 | |
117 | struct mii_if_info mii; | |
118 | struct ks8851_rxctrl rxctrl; | |
119 | ||
120 | struct work_struct tx_work; | |
121 | struct work_struct irq_work; | |
122 | struct work_struct rxctrl_work; | |
123 | ||
124 | struct sk_buff_head txq; | |
125 | ||
126 | struct spi_message spi_msg1; | |
127 | struct spi_message spi_msg2; | |
128 | struct spi_transfer spi_xfer1; | |
129 | struct spi_transfer spi_xfer2[2]; | |
130 | }; | |
131 | ||
132 | static int msg_enable; | |
133 | ||
3ba81f3e BD |
134 | /* shift for byte-enable data */ |
135 | #define BYTE_EN(_x) ((_x) << 2) | |
136 | ||
137 | /* turn register number and byte-enable mask into data for start of packet */ | |
138 | #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) | |
139 | ||
140 | /* SPI register read/write calls. | |
141 | * | |
142 | * All these calls issue SPI transactions to access the chip's registers. They | |
143 | * all require that the necessary lock is held to prevent accesses when the | |
144 | * chip is busy transfering packet data (RX/TX FIFO accesses). | |
145 | */ | |
146 | ||
147 | /** | |
148 | * ks8851_wrreg16 - write 16bit register value to chip | |
149 | * @ks: The chip state | |
150 | * @reg: The register address | |
151 | * @val: The value to write | |
152 | * | |
153 | * Issue a write to put the value @val into the register specified in @reg. | |
154 | */ | |
155 | static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) | |
156 | { | |
157 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
158 | struct spi_message *msg = &ks->spi_msg1; | |
159 | __le16 txb[2]; | |
160 | int ret; | |
161 | ||
162 | txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); | |
163 | txb[1] = cpu_to_le16(val); | |
164 | ||
165 | xfer->tx_buf = txb; | |
166 | xfer->rx_buf = NULL; | |
167 | xfer->len = 4; | |
168 | ||
169 | ret = spi_sync(ks->spidev, msg); | |
170 | if (ret < 0) | |
0dc7d2b3 | 171 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
3ba81f3e BD |
172 | } |
173 | ||
160d0fad BD |
174 | /** |
175 | * ks8851_wrreg8 - write 8bit register value to chip | |
176 | * @ks: The chip state | |
177 | * @reg: The register address | |
178 | * @val: The value to write | |
179 | * | |
180 | * Issue a write to put the value @val into the register specified in @reg. | |
181 | */ | |
182 | static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) | |
183 | { | |
184 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
185 | struct spi_message *msg = &ks->spi_msg1; | |
186 | __le16 txb[2]; | |
187 | int ret; | |
188 | int bit; | |
189 | ||
190 | bit = 1 << (reg & 3); | |
191 | ||
192 | txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); | |
193 | txb[1] = val; | |
194 | ||
195 | xfer->tx_buf = txb; | |
196 | xfer->rx_buf = NULL; | |
197 | xfer->len = 3; | |
198 | ||
199 | ret = spi_sync(ks->spidev, msg); | |
200 | if (ret < 0) | |
0dc7d2b3 | 201 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
160d0fad BD |
202 | } |
203 | ||
3ba81f3e BD |
204 | /** |
205 | * ks8851_rx_1msg - select whether to use one or two messages for spi read | |
206 | * @ks: The device structure | |
207 | * | |
208 | * Return whether to generate a single message with a tx and rx buffer | |
209 | * supplied to spi_sync(), or alternatively send the tx and rx buffers | |
210 | * as separate messages. | |
211 | * | |
212 | * Depending on the hardware in use, a single message may be more efficient | |
213 | * on interrupts or work done by the driver. | |
214 | * | |
215 | * This currently always returns true until we add some per-device data passed | |
216 | * from the platform code to specify which mode is better. | |
217 | */ | |
218 | static inline bool ks8851_rx_1msg(struct ks8851_net *ks) | |
219 | { | |
220 | return true; | |
221 | } | |
222 | ||
223 | /** | |
224 | * ks8851_rdreg - issue read register command and return the data | |
225 | * @ks: The device state | |
226 | * @op: The register address and byte enables in message format. | |
227 | * @rxb: The RX buffer to return the result into | |
228 | * @rxl: The length of data expected. | |
229 | * | |
230 | * This is the low level read call that issues the necessary spi message(s) | |
231 | * to read data from the register specified in @op. | |
232 | */ | |
233 | static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, | |
234 | u8 *rxb, unsigned rxl) | |
235 | { | |
236 | struct spi_transfer *xfer; | |
237 | struct spi_message *msg; | |
238 | __le16 *txb = (__le16 *)ks->txd; | |
239 | u8 *trx = ks->rxd; | |
240 | int ret; | |
241 | ||
242 | txb[0] = cpu_to_le16(op | KS_SPIOP_RD); | |
243 | ||
244 | if (ks8851_rx_1msg(ks)) { | |
245 | msg = &ks->spi_msg1; | |
246 | xfer = &ks->spi_xfer1; | |
247 | ||
248 | xfer->tx_buf = txb; | |
249 | xfer->rx_buf = trx; | |
250 | xfer->len = rxl + 2; | |
251 | } else { | |
252 | msg = &ks->spi_msg2; | |
253 | xfer = ks->spi_xfer2; | |
254 | ||
255 | xfer->tx_buf = txb; | |
256 | xfer->rx_buf = NULL; | |
257 | xfer->len = 2; | |
258 | ||
259 | xfer++; | |
260 | xfer->tx_buf = NULL; | |
261 | xfer->rx_buf = trx; | |
262 | xfer->len = rxl; | |
263 | } | |
264 | ||
265 | ret = spi_sync(ks->spidev, msg); | |
266 | if (ret < 0) | |
0dc7d2b3 | 267 | netdev_err(ks->netdev, "read: spi_sync() failed\n"); |
3ba81f3e BD |
268 | else if (ks8851_rx_1msg(ks)) |
269 | memcpy(rxb, trx + 2, rxl); | |
270 | else | |
271 | memcpy(rxb, trx, rxl); | |
272 | } | |
273 | ||
274 | /** | |
275 | * ks8851_rdreg8 - read 8 bit register from device | |
276 | * @ks: The chip information | |
277 | * @reg: The register address | |
278 | * | |
279 | * Read a 8bit register from the chip, returning the result | |
280 | */ | |
281 | static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) | |
282 | { | |
283 | u8 rxb[1]; | |
284 | ||
285 | ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); | |
286 | return rxb[0]; | |
287 | } | |
288 | ||
289 | /** | |
290 | * ks8851_rdreg16 - read 16 bit register from device | |
291 | * @ks: The chip information | |
292 | * @reg: The register address | |
293 | * | |
294 | * Read a 16bit register from the chip, returning the result | |
295 | */ | |
296 | static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) | |
297 | { | |
298 | __le16 rx = 0; | |
299 | ||
300 | ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); | |
301 | return le16_to_cpu(rx); | |
302 | } | |
303 | ||
304 | /** | |
305 | * ks8851_rdreg32 - read 32 bit register from device | |
306 | * @ks: The chip information | |
307 | * @reg: The register address | |
308 | * | |
309 | * Read a 32bit register from the chip. | |
310 | * | |
311 | * Note, this read requires the address be aligned to 4 bytes. | |
312 | */ | |
313 | static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) | |
314 | { | |
315 | __le32 rx = 0; | |
316 | ||
317 | WARN_ON(reg & 3); | |
318 | ||
319 | ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); | |
320 | return le32_to_cpu(rx); | |
321 | } | |
322 | ||
323 | /** | |
324 | * ks8851_soft_reset - issue one of the soft reset to the device | |
325 | * @ks: The device state. | |
326 | * @op: The bit(s) to set in the GRR | |
327 | * | |
328 | * Issue the relevant soft-reset command to the device's GRR register | |
329 | * specified by @op. | |
330 | * | |
331 | * Note, the delays are in there as a caution to ensure that the reset | |
332 | * has time to take effect and then complete. Since the datasheet does | |
333 | * not currently specify the exact sequence, we have chosen something | |
334 | * that seems to work with our device. | |
335 | */ | |
336 | static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) | |
337 | { | |
338 | ks8851_wrreg16(ks, KS_GRR, op); | |
339 | mdelay(1); /* wait a short time to effect reset */ | |
340 | ks8851_wrreg16(ks, KS_GRR, 0); | |
341 | mdelay(1); /* wait for condition to clear */ | |
342 | } | |
343 | ||
344 | /** | |
345 | * ks8851_write_mac_addr - write mac address to device registers | |
346 | * @dev: The network device | |
347 | * | |
348 | * Update the KS8851 MAC address registers from the address in @dev. | |
349 | * | |
350 | * This call assumes that the chip is not running, so there is no need to | |
351 | * shutdown the RXQ process whilst setting this. | |
352 | */ | |
353 | static int ks8851_write_mac_addr(struct net_device *dev) | |
354 | { | |
355 | struct ks8851_net *ks = netdev_priv(dev); | |
160d0fad | 356 | int i; |
3ba81f3e BD |
357 | |
358 | mutex_lock(&ks->lock); | |
359 | ||
160d0fad BD |
360 | for (i = 0; i < ETH_ALEN; i++) |
361 | ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); | |
3ba81f3e BD |
362 | |
363 | mutex_unlock(&ks->lock); | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | /** | |
369 | * ks8851_init_mac - initialise the mac address | |
370 | * @ks: The device structure | |
371 | * | |
372 | * Get or create the initial mac address for the device and then set that | |
373 | * into the station address register. Currently we assume that the device | |
374 | * does not have a valid mac address in it, and so we use random_ether_addr() | |
375 | * to create a new one. | |
376 | * | |
377 | * In future, the driver should check to see if the device has an EEPROM | |
378 | * attached and whether that has a valid ethernet address in it. | |
379 | */ | |
380 | static void ks8851_init_mac(struct ks8851_net *ks) | |
381 | { | |
382 | struct net_device *dev = ks->netdev; | |
383 | ||
384 | random_ether_addr(dev->dev_addr); | |
385 | ks8851_write_mac_addr(dev); | |
386 | } | |
387 | ||
388 | /** | |
389 | * ks8851_irq - device interrupt handler | |
390 | * @irq: Interrupt number passed from the IRQ hnalder. | |
391 | * @pw: The private word passed to register_irq(), our struct ks8851_net. | |
392 | * | |
393 | * Disable the interrupt from happening again until we've processed the | |
394 | * current status by scheduling ks8851_irq_work(). | |
395 | */ | |
396 | static irqreturn_t ks8851_irq(int irq, void *pw) | |
397 | { | |
398 | struct ks8851_net *ks = pw; | |
399 | ||
400 | disable_irq_nosync(irq); | |
401 | schedule_work(&ks->irq_work); | |
402 | return IRQ_HANDLED; | |
403 | } | |
404 | ||
405 | /** | |
406 | * ks8851_rdfifo - read data from the receive fifo | |
407 | * @ks: The device state. | |
408 | * @buff: The buffer address | |
409 | * @len: The length of the data to read | |
410 | * | |
9ddc5b6f | 411 | * Issue an RXQ FIFO read command and read the @len amount of data from |
3ba81f3e BD |
412 | * the FIFO into the buffer specified by @buff. |
413 | */ | |
414 | static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) | |
415 | { | |
416 | struct spi_transfer *xfer = ks->spi_xfer2; | |
417 | struct spi_message *msg = &ks->spi_msg2; | |
418 | u8 txb[1]; | |
419 | int ret; | |
420 | ||
0dc7d2b3 JP |
421 | netif_dbg(ks, rx_status, ks->netdev, |
422 | "%s: %d@%p\n", __func__, len, buff); | |
3ba81f3e BD |
423 | |
424 | /* set the operation we're issuing */ | |
425 | txb[0] = KS_SPIOP_RXFIFO; | |
426 | ||
427 | xfer->tx_buf = txb; | |
428 | xfer->rx_buf = NULL; | |
429 | xfer->len = 1; | |
430 | ||
431 | xfer++; | |
432 | xfer->rx_buf = buff; | |
433 | xfer->tx_buf = NULL; | |
434 | xfer->len = len; | |
435 | ||
436 | ret = spi_sync(ks->spidev, msg); | |
437 | if (ret < 0) | |
0dc7d2b3 | 438 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
439 | } |
440 | ||
441 | /** | |
442 | * ks8851_dbg_dumpkkt - dump initial packet contents to debug | |
443 | * @ks: The device state | |
444 | * @rxpkt: The data for the received packet | |
445 | * | |
446 | * Dump the initial data from the packet to dev_dbg(). | |
447 | */ | |
448 | static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) | |
449 | { | |
0dc7d2b3 JP |
450 | netdev_dbg(ks->netdev, |
451 | "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", | |
452 | rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], | |
453 | rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], | |
454 | rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); | |
3ba81f3e BD |
455 | } |
456 | ||
457 | /** | |
458 | * ks8851_rx_pkts - receive packets from the host | |
459 | * @ks: The device information. | |
460 | * | |
461 | * This is called from the IRQ work queue when the system detects that there | |
462 | * are packets in the receive queue. Find out how many packets there are and | |
463 | * read them from the FIFO. | |
464 | */ | |
465 | static void ks8851_rx_pkts(struct ks8851_net *ks) | |
466 | { | |
467 | struct sk_buff *skb; | |
468 | unsigned rxfc; | |
469 | unsigned rxlen; | |
470 | unsigned rxstat; | |
471 | u32 rxh; | |
472 | u8 *rxpkt; | |
473 | ||
474 | rxfc = ks8851_rdreg8(ks, KS_RXFC); | |
475 | ||
0dc7d2b3 JP |
476 | netif_dbg(ks, rx_status, ks->netdev, |
477 | "%s: %d packets\n", __func__, rxfc); | |
3ba81f3e BD |
478 | |
479 | /* Currently we're issuing a read per packet, but we could possibly | |
480 | * improve the code by issuing a single read, getting the receive | |
481 | * header, allocating the packet and then reading the packet data | |
482 | * out in one go. | |
483 | * | |
484 | * This form of operation would require us to hold the SPI bus' | |
485 | * chipselect low during the entie transaction to avoid any | |
486 | * reset to the data stream comming from the chip. | |
487 | */ | |
488 | ||
489 | for (; rxfc != 0; rxfc--) { | |
490 | rxh = ks8851_rdreg32(ks, KS_RXFHSR); | |
491 | rxstat = rxh & 0xffff; | |
492 | rxlen = rxh >> 16; | |
493 | ||
0dc7d2b3 JP |
494 | netif_dbg(ks, rx_status, ks->netdev, |
495 | "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); | |
3ba81f3e BD |
496 | |
497 | /* the length of the packet includes the 32bit CRC */ | |
498 | ||
499 | /* set dma read address */ | |
500 | ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); | |
501 | ||
502 | /* start the packet dma process, and set auto-dequeue rx */ | |
503 | ks8851_wrreg16(ks, KS_RXQCR, | |
504 | ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); | |
505 | ||
972c40b5 ED |
506 | if (rxlen > 4) { |
507 | unsigned int rxalign; | |
508 | ||
509 | rxlen -= 4; | |
510 | rxalign = ALIGN(rxlen, 4); | |
511 | skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); | |
512 | if (skb) { | |
3ba81f3e | 513 | |
972c40b5 ED |
514 | /* 4 bytes of status header + 4 bytes of |
515 | * garbage: we put them before ethernet | |
516 | * header, so that they are copied, | |
517 | * but ignored. | |
518 | */ | |
3ba81f3e | 519 | |
972c40b5 | 520 | rxpkt = skb_put(skb, rxlen) - 8; |
3ba81f3e | 521 | |
972c40b5 | 522 | ks8851_rdfifo(ks, rxpkt, rxalign + 8); |
3ba81f3e | 523 | |
972c40b5 ED |
524 | if (netif_msg_pktdata(ks)) |
525 | ks8851_dbg_dumpkkt(ks, rxpkt); | |
3ba81f3e | 526 | |
972c40b5 ED |
527 | skb->protocol = eth_type_trans(skb, ks->netdev); |
528 | netif_rx(skb); | |
3ba81f3e | 529 | |
972c40b5 ED |
530 | ks->netdev->stats.rx_packets++; |
531 | ks->netdev->stats.rx_bytes += rxlen; | |
532 | } | |
3ba81f3e BD |
533 | } |
534 | ||
535 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
536 | } | |
537 | } | |
538 | ||
539 | /** | |
540 | * ks8851_irq_work - work queue handler for dealing with interrupt requests | |
541 | * @work: The work structure that was scheduled by schedule_work() | |
542 | * | |
543 | * This is the handler invoked when the ks8851_irq() is called to find out | |
544 | * what happened, as we cannot allow ourselves to sleep whilst waiting for | |
545 | * anything other process has the chip's lock. | |
546 | * | |
547 | * Read the interrupt status, work out what needs to be done and then clear | |
548 | * any of the interrupts that are not needed. | |
549 | */ | |
550 | static void ks8851_irq_work(struct work_struct *work) | |
551 | { | |
552 | struct ks8851_net *ks = container_of(work, struct ks8851_net, irq_work); | |
553 | unsigned status; | |
554 | unsigned handled = 0; | |
555 | ||
556 | mutex_lock(&ks->lock); | |
557 | ||
558 | status = ks8851_rdreg16(ks, KS_ISR); | |
559 | ||
0dc7d2b3 JP |
560 | netif_dbg(ks, intr, ks->netdev, |
561 | "%s: status 0x%04x\n", __func__, status); | |
3ba81f3e BD |
562 | |
563 | if (status & IRQ_LCI) { | |
564 | /* should do something about checking link status */ | |
565 | handled |= IRQ_LCI; | |
566 | } | |
567 | ||
568 | if (status & IRQ_LDI) { | |
569 | u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
570 | pmecr &= ~PMECR_WKEVT_MASK; | |
571 | ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); | |
572 | ||
573 | handled |= IRQ_LDI; | |
574 | } | |
575 | ||
576 | if (status & IRQ_RXPSI) | |
577 | handled |= IRQ_RXPSI; | |
578 | ||
579 | if (status & IRQ_TXI) { | |
580 | handled |= IRQ_TXI; | |
581 | ||
582 | /* no lock here, tx queue should have been stopped */ | |
583 | ||
584 | /* update our idea of how much tx space is available to the | |
585 | * system */ | |
586 | ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); | |
587 | ||
0dc7d2b3 JP |
588 | netif_dbg(ks, intr, ks->netdev, |
589 | "%s: txspace %d\n", __func__, ks->tx_space); | |
3ba81f3e BD |
590 | } |
591 | ||
592 | if (status & IRQ_RXI) | |
593 | handled |= IRQ_RXI; | |
594 | ||
595 | if (status & IRQ_SPIBEI) { | |
596 | dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); | |
597 | handled |= IRQ_SPIBEI; | |
598 | } | |
599 | ||
600 | ks8851_wrreg16(ks, KS_ISR, handled); | |
601 | ||
602 | if (status & IRQ_RXI) { | |
603 | /* the datasheet says to disable the rx interrupt during | |
604 | * packet read-out, however we're masking the interrupt | |
605 | * from the device so do not bother masking just the RX | |
606 | * from the device. */ | |
607 | ||
608 | ks8851_rx_pkts(ks); | |
609 | } | |
610 | ||
611 | /* if something stopped the rx process, probably due to wanting | |
612 | * to change the rx settings, then do something about restarting | |
613 | * it. */ | |
614 | if (status & IRQ_RXPSI) { | |
615 | struct ks8851_rxctrl *rxc = &ks->rxctrl; | |
616 | ||
617 | /* update the multicast hash table */ | |
618 | ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); | |
619 | ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); | |
620 | ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); | |
621 | ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); | |
622 | ||
623 | ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); | |
624 | ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); | |
625 | } | |
626 | ||
627 | mutex_unlock(&ks->lock); | |
628 | ||
629 | if (status & IRQ_TXI) | |
630 | netif_wake_queue(ks->netdev); | |
631 | ||
632 | enable_irq(ks->netdev->irq); | |
633 | } | |
634 | ||
635 | /** | |
636 | * calc_txlen - calculate size of message to send packet | |
637 | * @len: Lenght of data | |
638 | * | |
639 | * Returns the size of the TXFIFO message needed to send | |
640 | * this packet. | |
641 | */ | |
642 | static inline unsigned calc_txlen(unsigned len) | |
643 | { | |
644 | return ALIGN(len + 4, 4); | |
645 | } | |
646 | ||
647 | /** | |
648 | * ks8851_wrpkt - write packet to TX FIFO | |
649 | * @ks: The device state. | |
650 | * @txp: The sk_buff to transmit. | |
651 | * @irq: IRQ on completion of the packet. | |
652 | * | |
653 | * Send the @txp to the chip. This means creating the relevant packet header | |
654 | * specifying the length of the packet and the other information the chip | |
655 | * needs, such as IRQ on completion. Send the header and the packet data to | |
656 | * the device. | |
657 | */ | |
658 | static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) | |
659 | { | |
660 | struct spi_transfer *xfer = ks->spi_xfer2; | |
661 | struct spi_message *msg = &ks->spi_msg2; | |
662 | unsigned fid = 0; | |
663 | int ret; | |
664 | ||
0dc7d2b3 JP |
665 | netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", |
666 | __func__, txp, txp->len, txp->data, irq); | |
3ba81f3e BD |
667 | |
668 | fid = ks->fid++; | |
669 | fid &= TXFR_TXFID_MASK; | |
670 | ||
671 | if (irq) | |
672 | fid |= TXFR_TXIC; /* irq on completion */ | |
673 | ||
674 | /* start header at txb[1] to align txw entries */ | |
675 | ks->txh.txb[1] = KS_SPIOP_TXFIFO; | |
676 | ks->txh.txw[1] = cpu_to_le16(fid); | |
677 | ks->txh.txw[2] = cpu_to_le16(txp->len); | |
678 | ||
679 | xfer->tx_buf = &ks->txh.txb[1]; | |
680 | xfer->rx_buf = NULL; | |
681 | xfer->len = 5; | |
682 | ||
683 | xfer++; | |
684 | xfer->tx_buf = txp->data; | |
685 | xfer->rx_buf = NULL; | |
686 | xfer->len = ALIGN(txp->len, 4); | |
687 | ||
688 | ret = spi_sync(ks->spidev, msg); | |
689 | if (ret < 0) | |
0dc7d2b3 | 690 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
691 | } |
692 | ||
693 | /** | |
694 | * ks8851_done_tx - update and then free skbuff after transmitting | |
695 | * @ks: The device state | |
696 | * @txb: The buffer transmitted | |
697 | */ | |
698 | static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) | |
699 | { | |
700 | struct net_device *dev = ks->netdev; | |
701 | ||
702 | dev->stats.tx_bytes += txb->len; | |
703 | dev->stats.tx_packets++; | |
704 | ||
705 | dev_kfree_skb(txb); | |
706 | } | |
707 | ||
708 | /** | |
709 | * ks8851_tx_work - process tx packet(s) | |
710 | * @work: The work strucutre what was scheduled. | |
711 | * | |
712 | * This is called when a number of packets have been scheduled for | |
713 | * transmission and need to be sent to the device. | |
714 | */ | |
715 | static void ks8851_tx_work(struct work_struct *work) | |
716 | { | |
717 | struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); | |
718 | struct sk_buff *txb; | |
3320eae5 | 719 | bool last = skb_queue_empty(&ks->txq); |
3ba81f3e BD |
720 | |
721 | mutex_lock(&ks->lock); | |
722 | ||
723 | while (!last) { | |
724 | txb = skb_dequeue(&ks->txq); | |
725 | last = skb_queue_empty(&ks->txq); | |
726 | ||
761172fb AA |
727 | if (txb != NULL) { |
728 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); | |
729 | ks8851_wrpkt(ks, txb, last); | |
730 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
731 | ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); | |
3ba81f3e | 732 | |
761172fb AA |
733 | ks8851_done_tx(ks, txb); |
734 | } | |
3ba81f3e BD |
735 | } |
736 | ||
737 | mutex_unlock(&ks->lock); | |
738 | } | |
739 | ||
740 | /** | |
741 | * ks8851_set_powermode - set power mode of the device | |
742 | * @ks: The device state | |
743 | * @pwrmode: The power mode value to write to KS_PMECR. | |
744 | * | |
745 | * Change the power mode of the chip. | |
746 | */ | |
747 | static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) | |
748 | { | |
749 | unsigned pmecr; | |
750 | ||
0dc7d2b3 | 751 | netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); |
3ba81f3e BD |
752 | |
753 | pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
754 | pmecr &= ~PMECR_PM_MASK; | |
755 | pmecr |= pwrmode; | |
756 | ||
757 | ks8851_wrreg16(ks, KS_PMECR, pmecr); | |
758 | } | |
759 | ||
760 | /** | |
761 | * ks8851_net_open - open network device | |
762 | * @dev: The network device being opened. | |
763 | * | |
764 | * Called when the network device is marked active, such as a user executing | |
765 | * 'ifconfig up' on the device. | |
766 | */ | |
767 | static int ks8851_net_open(struct net_device *dev) | |
768 | { | |
769 | struct ks8851_net *ks = netdev_priv(dev); | |
770 | ||
771 | /* lock the card, even if we may not actually be doing anything | |
772 | * else at the moment */ | |
773 | mutex_lock(&ks->lock); | |
774 | ||
0dc7d2b3 | 775 | netif_dbg(ks, ifup, ks->netdev, "opening\n"); |
3ba81f3e BD |
776 | |
777 | /* bring chip out of any power saving mode it was in */ | |
778 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
779 | ||
780 | /* issue a soft reset to the RX/TX QMU to put it into a known | |
781 | * state. */ | |
782 | ks8851_soft_reset(ks, GRR_QMU); | |
783 | ||
784 | /* setup transmission parameters */ | |
785 | ||
786 | ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ | |
787 | TXCR_TXPE | /* pad to min length */ | |
788 | TXCR_TXCRC | /* add CRC */ | |
789 | TXCR_TXFCE)); /* enable flow control */ | |
790 | ||
791 | /* auto-increment tx data, reset tx pointer */ | |
792 | ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); | |
793 | ||
794 | /* setup receiver control */ | |
795 | ||
796 | ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ | |
797 | RXCR1_RXFCE | /* enable flow control */ | |
798 | RXCR1_RXBE | /* broadcast enable */ | |
799 | RXCR1_RXUE | /* unicast enable */ | |
800 | RXCR1_RXE)); /* enable rx block */ | |
801 | ||
802 | /* transfer entire frames out in one go */ | |
803 | ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); | |
804 | ||
805 | /* set receive counter timeouts */ | |
806 | ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ | |
807 | ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ | |
808 | ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ | |
809 | ||
810 | ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ | |
811 | RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ | |
812 | RXQCR_RXDTTE); /* IRQ on time exceeded */ | |
813 | ||
814 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
815 | ||
816 | /* clear then enable interrupts */ | |
817 | ||
818 | #define STD_IRQ (IRQ_LCI | /* Link Change */ \ | |
819 | IRQ_TXI | /* TX done */ \ | |
820 | IRQ_RXI | /* RX done */ \ | |
821 | IRQ_SPIBEI | /* SPI bus error */ \ | |
822 | IRQ_TXPSI | /* TX process stop */ \ | |
823 | IRQ_RXPSI) /* RX process stop */ | |
824 | ||
825 | ks->rc_ier = STD_IRQ; | |
826 | ks8851_wrreg16(ks, KS_ISR, STD_IRQ); | |
827 | ks8851_wrreg16(ks, KS_IER, STD_IRQ); | |
828 | ||
829 | netif_start_queue(ks->netdev); | |
830 | ||
0dc7d2b3 | 831 | netif_dbg(ks, ifup, ks->netdev, "network device up\n"); |
3ba81f3e BD |
832 | |
833 | mutex_unlock(&ks->lock); | |
834 | return 0; | |
835 | } | |
836 | ||
837 | /** | |
838 | * ks8851_net_stop - close network device | |
839 | * @dev: The device being closed. | |
840 | * | |
841 | * Called to close down a network device which has been active. Cancell any | |
842 | * work, shutdown the RX and TX process and then place the chip into a low | |
843 | * power state whilst it is not being used. | |
844 | */ | |
845 | static int ks8851_net_stop(struct net_device *dev) | |
846 | { | |
847 | struct ks8851_net *ks = netdev_priv(dev); | |
848 | ||
0dc7d2b3 | 849 | netif_info(ks, ifdown, dev, "shutting down\n"); |
3ba81f3e BD |
850 | |
851 | netif_stop_queue(dev); | |
852 | ||
853 | mutex_lock(&ks->lock); | |
854 | ||
855 | /* stop any outstanding work */ | |
856 | flush_work(&ks->irq_work); | |
857 | flush_work(&ks->tx_work); | |
858 | flush_work(&ks->rxctrl_work); | |
859 | ||
860 | /* turn off the IRQs and ack any outstanding */ | |
861 | ks8851_wrreg16(ks, KS_IER, 0x0000); | |
862 | ks8851_wrreg16(ks, KS_ISR, 0xffff); | |
863 | ||
864 | /* shutdown RX process */ | |
865 | ks8851_wrreg16(ks, KS_RXCR1, 0x0000); | |
866 | ||
867 | /* shutdown TX process */ | |
868 | ks8851_wrreg16(ks, KS_TXCR, 0x0000); | |
869 | ||
870 | /* set powermode to soft power down to save power */ | |
871 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
872 | ||
873 | /* ensure any queued tx buffers are dumped */ | |
874 | while (!skb_queue_empty(&ks->txq)) { | |
875 | struct sk_buff *txb = skb_dequeue(&ks->txq); | |
876 | ||
0dc7d2b3 JP |
877 | netif_dbg(ks, ifdown, ks->netdev, |
878 | "%s: freeing txb %p\n", __func__, txb); | |
3ba81f3e BD |
879 | |
880 | dev_kfree_skb(txb); | |
881 | } | |
882 | ||
883 | mutex_unlock(&ks->lock); | |
884 | return 0; | |
885 | } | |
886 | ||
887 | /** | |
888 | * ks8851_start_xmit - transmit packet | |
889 | * @skb: The buffer to transmit | |
890 | * @dev: The device used to transmit the packet. | |
891 | * | |
892 | * Called by the network layer to transmit the @skb. Queue the packet for | |
893 | * the device and schedule the necessary work to transmit the packet when | |
894 | * it is free. | |
895 | * | |
896 | * We do this to firstly avoid sleeping with the network device locked, | |
897 | * and secondly so we can round up more than one packet to transmit which | |
898 | * means we can try and avoid generating too many transmit done interrupts. | |
899 | */ | |
61357325 SH |
900 | static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, |
901 | struct net_device *dev) | |
3ba81f3e BD |
902 | { |
903 | struct ks8851_net *ks = netdev_priv(dev); | |
904 | unsigned needed = calc_txlen(skb->len); | |
61357325 | 905 | netdev_tx_t ret = NETDEV_TX_OK; |
3ba81f3e | 906 | |
0dc7d2b3 JP |
907 | netif_dbg(ks, tx_queued, ks->netdev, |
908 | "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); | |
3ba81f3e BD |
909 | |
910 | spin_lock(&ks->statelock); | |
911 | ||
912 | if (needed > ks->tx_space) { | |
913 | netif_stop_queue(dev); | |
914 | ret = NETDEV_TX_BUSY; | |
915 | } else { | |
916 | ks->tx_space -= needed; | |
917 | skb_queue_tail(&ks->txq, skb); | |
918 | } | |
919 | ||
920 | spin_unlock(&ks->statelock); | |
921 | schedule_work(&ks->tx_work); | |
922 | ||
923 | return ret; | |
924 | } | |
925 | ||
926 | /** | |
927 | * ks8851_rxctrl_work - work handler to change rx mode | |
928 | * @work: The work structure this belongs to. | |
929 | * | |
930 | * Lock the device and issue the necessary changes to the receive mode from | |
931 | * the network device layer. This is done so that we can do this without | |
932 | * having to sleep whilst holding the network device lock. | |
933 | * | |
934 | * Since the recommendation from Micrel is that the RXQ is shutdown whilst the | |
935 | * receive parameters are programmed, we issue a write to disable the RXQ and | |
936 | * then wait for the interrupt handler to be triggered once the RXQ shutdown is | |
937 | * complete. The interrupt handler then writes the new values into the chip. | |
938 | */ | |
939 | static void ks8851_rxctrl_work(struct work_struct *work) | |
940 | { | |
941 | struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); | |
942 | ||
943 | mutex_lock(&ks->lock); | |
944 | ||
945 | /* need to shutdown RXQ before modifying filter parameters */ | |
946 | ks8851_wrreg16(ks, KS_RXCR1, 0x00); | |
947 | ||
948 | mutex_unlock(&ks->lock); | |
949 | } | |
950 | ||
951 | static void ks8851_set_rx_mode(struct net_device *dev) | |
952 | { | |
953 | struct ks8851_net *ks = netdev_priv(dev); | |
954 | struct ks8851_rxctrl rxctrl; | |
955 | ||
956 | memset(&rxctrl, 0, sizeof(rxctrl)); | |
957 | ||
958 | if (dev->flags & IFF_PROMISC) { | |
959 | /* interface to receive everything */ | |
960 | ||
961 | rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; | |
962 | } else if (dev->flags & IFF_ALLMULTI) { | |
963 | /* accept all multicast packets */ | |
964 | ||
965 | rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | | |
966 | RXCR1_RXPAFMA | RXCR1_RXMAFMA); | |
4cd24eaf | 967 | } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { |
22bedad3 | 968 | struct netdev_hw_addr *ha; |
3ba81f3e | 969 | u32 crc; |
3ba81f3e BD |
970 | |
971 | /* accept some multicast */ | |
972 | ||
22bedad3 JP |
973 | netdev_for_each_mc_addr(ha, dev) { |
974 | crc = ether_crc(ETH_ALEN, ha->addr); | |
3ba81f3e BD |
975 | crc >>= (32 - 6); /* get top six bits */ |
976 | ||
977 | rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); | |
3ba81f3e BD |
978 | } |
979 | ||
b6a71bfa | 980 | rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; |
3ba81f3e BD |
981 | } else { |
982 | /* just accept broadcast / unicast */ | |
983 | rxctrl.rxcr1 = RXCR1_RXPAFMA; | |
984 | } | |
985 | ||
986 | rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ | |
987 | RXCR1_RXBE | /* broadcast enable */ | |
988 | RXCR1_RXE | /* RX process enable */ | |
989 | RXCR1_RXFCE); /* enable flow control */ | |
990 | ||
991 | rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; | |
992 | ||
993 | /* schedule work to do the actual set of the data if needed */ | |
994 | ||
995 | spin_lock(&ks->statelock); | |
996 | ||
997 | if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { | |
998 | memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); | |
999 | schedule_work(&ks->rxctrl_work); | |
1000 | } | |
1001 | ||
1002 | spin_unlock(&ks->statelock); | |
1003 | } | |
1004 | ||
1005 | static int ks8851_set_mac_address(struct net_device *dev, void *addr) | |
1006 | { | |
1007 | struct sockaddr *sa = addr; | |
1008 | ||
1009 | if (netif_running(dev)) | |
1010 | return -EBUSY; | |
1011 | ||
1012 | if (!is_valid_ether_addr(sa->sa_data)) | |
1013 | return -EADDRNOTAVAIL; | |
1014 | ||
1015 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); | |
1016 | return ks8851_write_mac_addr(dev); | |
1017 | } | |
1018 | ||
1019 | static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) | |
1020 | { | |
1021 | struct ks8851_net *ks = netdev_priv(dev); | |
1022 | ||
1023 | if (!netif_running(dev)) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); | |
1027 | } | |
1028 | ||
1029 | static const struct net_device_ops ks8851_netdev_ops = { | |
1030 | .ndo_open = ks8851_net_open, | |
1031 | .ndo_stop = ks8851_net_stop, | |
1032 | .ndo_do_ioctl = ks8851_net_ioctl, | |
1033 | .ndo_start_xmit = ks8851_start_xmit, | |
1034 | .ndo_set_mac_address = ks8851_set_mac_address, | |
1035 | .ndo_set_rx_mode = ks8851_set_rx_mode, | |
1036 | .ndo_change_mtu = eth_change_mtu, | |
1037 | .ndo_validate_addr = eth_validate_addr, | |
1038 | }; | |
1039 | ||
a4bdfff7 SJ |
1040 | /* Companion eeprom access */ |
1041 | ||
1042 | enum { /* EEPROM programming states */ | |
1043 | EEPROM_CONTROL, | |
1044 | EEPROM_ADDRESS, | |
1045 | EEPROM_DATA, | |
1046 | EEPROM_COMPLETE | |
1047 | }; | |
1048 | ||
1049 | /** | |
1050 | * ks8851_eeprom_read - read a 16bits word in ks8851 companion EEPROM | |
1051 | * @dev: The network device the PHY is on. | |
1052 | * @addr: EEPROM address to read | |
1053 | * | |
1054 | * eeprom_size: used to define the data coding length. Can be changed | |
1055 | * through debug-fs. | |
1056 | * | |
1057 | * Programs a read on the EEPROM using ks8851 EEPROM SW access feature. | |
1058 | * Warning: The READ feature is not supported on ks8851 revision 0. | |
1059 | * | |
1060 | * Rough programming model: | |
1061 | * - on period start: set clock high and read value on bus | |
1062 | * - on period / 2: set clock low and program value on bus | |
1063 | * - start on period / 2 | |
1064 | */ | |
1065 | unsigned int ks8851_eeprom_read(struct net_device *dev, unsigned int addr) | |
1066 | { | |
1067 | struct ks8851_net *ks = netdev_priv(dev); | |
1068 | int eepcr; | |
1069 | int ctrl = EEPROM_OP_READ; | |
1070 | int state = EEPROM_CONTROL; | |
1071 | int bit_count = EEPROM_OP_LEN - 1; | |
1072 | unsigned int data = 0; | |
1073 | int dummy; | |
1074 | unsigned int addr_len; | |
1075 | ||
1076 | addr_len = (ks->eeprom_size == 128) ? 6 : 8; | |
1077 | ||
1078 | /* start transaction: chip select high, authorize write */ | |
1079 | mutex_lock(&ks->lock); | |
1080 | eepcr = EEPCR_EESA | EEPCR_EESRWA; | |
1081 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1082 | eepcr |= EEPCR_EECS; | |
1083 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1084 | mutex_unlock(&ks->lock); | |
1085 | ||
1086 | while (state != EEPROM_COMPLETE) { | |
1087 | /* falling clock period starts... */ | |
1088 | /* set EED_IO pin for control and address */ | |
1089 | eepcr &= ~EEPCR_EEDO; | |
1090 | switch (state) { | |
1091 | case EEPROM_CONTROL: | |
1092 | eepcr |= ((ctrl >> bit_count) & 1) << 2; | |
1093 | if (bit_count-- <= 0) { | |
1094 | bit_count = addr_len - 1; | |
1095 | state = EEPROM_ADDRESS; | |
1096 | } | |
1097 | break; | |
1098 | case EEPROM_ADDRESS: | |
1099 | eepcr |= ((addr >> bit_count) & 1) << 2; | |
1100 | bit_count--; | |
1101 | break; | |
1102 | case EEPROM_DATA: | |
1103 | /* Change to receive mode */ | |
1104 | eepcr &= ~EEPCR_EESRWA; | |
1105 | break; | |
1106 | } | |
1107 | ||
1108 | /* lower clock */ | |
1109 | eepcr &= ~EEPCR_EESCK; | |
1110 | ||
1111 | mutex_lock(&ks->lock); | |
1112 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1113 | mutex_unlock(&ks->lock); | |
1114 | ||
1115 | /* waitread period / 2 */ | |
1116 | udelay(EEPROM_SK_PERIOD / 2); | |
1117 | ||
1118 | /* rising clock period starts... */ | |
1119 | ||
1120 | /* raise clock */ | |
1121 | mutex_lock(&ks->lock); | |
1122 | eepcr |= EEPCR_EESCK; | |
1123 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1124 | mutex_unlock(&ks->lock); | |
1125 | ||
1126 | /* Manage read */ | |
1127 | switch (state) { | |
1128 | case EEPROM_ADDRESS: | |
1129 | if (bit_count < 0) { | |
1130 | bit_count = EEPROM_DATA_LEN - 1; | |
1131 | state = EEPROM_DATA; | |
1132 | } | |
1133 | break; | |
1134 | case EEPROM_DATA: | |
1135 | mutex_lock(&ks->lock); | |
1136 | dummy = ks8851_rdreg16(ks, KS_EEPCR); | |
1137 | mutex_unlock(&ks->lock); | |
1138 | data |= ((dummy >> EEPCR_EESB_OFFSET) & 1) << bit_count; | |
1139 | if (bit_count-- <= 0) | |
1140 | state = EEPROM_COMPLETE; | |
1141 | break; | |
1142 | } | |
1143 | ||
1144 | /* wait period / 2 */ | |
1145 | udelay(EEPROM_SK_PERIOD / 2); | |
1146 | } | |
1147 | ||
1148 | /* close transaction */ | |
1149 | mutex_lock(&ks->lock); | |
1150 | eepcr &= ~EEPCR_EECS; | |
1151 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1152 | eepcr = 0; | |
1153 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1154 | mutex_unlock(&ks->lock); | |
1155 | ||
1156 | return data; | |
1157 | } | |
1158 | ||
1159 | /** | |
1160 | * ks8851_eeprom_write - write a 16bits word in ks8851 companion EEPROM | |
1161 | * @dev: The network device the PHY is on. | |
1162 | * @op: operand (can be WRITE, EWEN, EWDS) | |
1163 | * @addr: EEPROM address to write | |
1164 | * @data: data to write | |
1165 | * | |
1166 | * eeprom_size: used to define the data coding length. Can be changed | |
1167 | * through debug-fs. | |
1168 | * | |
1169 | * Programs a write on the EEPROM using ks8851 EEPROM SW access feature. | |
1170 | * | |
1171 | * Note that a write enable is required before writing data. | |
1172 | * | |
1173 | * Rough programming model: | |
1174 | * - on period start: set clock high | |
1175 | * - on period / 2: set clock low and program value on bus | |
1176 | * - start on period / 2 | |
1177 | */ | |
1178 | void ks8851_eeprom_write(struct net_device *dev, unsigned int op, | |
1179 | unsigned int addr, unsigned int data) | |
1180 | { | |
1181 | struct ks8851_net *ks = netdev_priv(dev); | |
1182 | int eepcr; | |
1183 | int state = EEPROM_CONTROL; | |
1184 | int bit_count = EEPROM_OP_LEN - 1; | |
1185 | unsigned int addr_len; | |
1186 | ||
1187 | addr_len = (ks->eeprom_size == 128) ? 6 : 8; | |
1188 | ||
1189 | switch (op) { | |
1190 | case EEPROM_OP_EWEN: | |
1191 | addr = 0x30; | |
1192 | break; | |
1193 | case EEPROM_OP_EWDS: | |
1194 | addr = 0; | |
1195 | break; | |
1196 | } | |
1197 | ||
1198 | /* start transaction: chip select high, authorize write */ | |
1199 | mutex_lock(&ks->lock); | |
1200 | eepcr = EEPCR_EESA | EEPCR_EESRWA; | |
1201 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1202 | eepcr |= EEPCR_EECS; | |
1203 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1204 | mutex_unlock(&ks->lock); | |
1205 | ||
1206 | while (state != EEPROM_COMPLETE) { | |
1207 | /* falling clock period starts... */ | |
1208 | /* set EED_IO pin for control and address */ | |
1209 | eepcr &= ~EEPCR_EEDO; | |
1210 | switch (state) { | |
1211 | case EEPROM_CONTROL: | |
1212 | eepcr |= ((op >> bit_count) & 1) << 2; | |
1213 | if (bit_count-- <= 0) { | |
1214 | bit_count = addr_len - 1; | |
1215 | state = EEPROM_ADDRESS; | |
1216 | } | |
1217 | break; | |
1218 | case EEPROM_ADDRESS: | |
1219 | eepcr |= ((addr >> bit_count) & 1) << 2; | |
1220 | if (bit_count-- <= 0) { | |
1221 | if (op == EEPROM_OP_WRITE) { | |
1222 | bit_count = EEPROM_DATA_LEN - 1; | |
1223 | state = EEPROM_DATA; | |
1224 | } else { | |
1225 | state = EEPROM_COMPLETE; | |
1226 | } | |
1227 | } | |
1228 | break; | |
1229 | case EEPROM_DATA: | |
1230 | eepcr |= ((data >> bit_count) & 1) << 2; | |
1231 | if (bit_count-- <= 0) | |
1232 | state = EEPROM_COMPLETE; | |
1233 | break; | |
1234 | } | |
1235 | ||
1236 | /* lower clock */ | |
1237 | eepcr &= ~EEPCR_EESCK; | |
1238 | ||
1239 | mutex_lock(&ks->lock); | |
1240 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1241 | mutex_unlock(&ks->lock); | |
1242 | ||
1243 | /* wait period / 2 */ | |
1244 | udelay(EEPROM_SK_PERIOD / 2); | |
1245 | ||
1246 | /* rising clock period starts... */ | |
1247 | ||
1248 | /* raise clock */ | |
1249 | eepcr |= EEPCR_EESCK; | |
1250 | mutex_lock(&ks->lock); | |
1251 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1252 | mutex_unlock(&ks->lock); | |
1253 | ||
1254 | /* wait period / 2 */ | |
1255 | udelay(EEPROM_SK_PERIOD / 2); | |
1256 | } | |
1257 | ||
1258 | /* close transaction */ | |
1259 | mutex_lock(&ks->lock); | |
1260 | eepcr &= ~EEPCR_EECS; | |
1261 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1262 | eepcr = 0; | |
1263 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1264 | mutex_unlock(&ks->lock); | |
1265 | ||
1266 | } | |
1267 | ||
3ba81f3e BD |
1268 | /* ethtool support */ |
1269 | ||
1270 | static void ks8851_get_drvinfo(struct net_device *dev, | |
1271 | struct ethtool_drvinfo *di) | |
1272 | { | |
1273 | strlcpy(di->driver, "KS8851", sizeof(di->driver)); | |
1274 | strlcpy(di->version, "1.00", sizeof(di->version)); | |
1275 | strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); | |
1276 | } | |
1277 | ||
1278 | static u32 ks8851_get_msglevel(struct net_device *dev) | |
1279 | { | |
1280 | struct ks8851_net *ks = netdev_priv(dev); | |
1281 | return ks->msg_enable; | |
1282 | } | |
1283 | ||
1284 | static void ks8851_set_msglevel(struct net_device *dev, u32 to) | |
1285 | { | |
1286 | struct ks8851_net *ks = netdev_priv(dev); | |
1287 | ks->msg_enable = to; | |
1288 | } | |
1289 | ||
1290 | static int ks8851_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1291 | { | |
1292 | struct ks8851_net *ks = netdev_priv(dev); | |
1293 | return mii_ethtool_gset(&ks->mii, cmd); | |
1294 | } | |
1295 | ||
1296 | static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1297 | { | |
1298 | struct ks8851_net *ks = netdev_priv(dev); | |
1299 | return mii_ethtool_sset(&ks->mii, cmd); | |
1300 | } | |
1301 | ||
1302 | static u32 ks8851_get_link(struct net_device *dev) | |
1303 | { | |
1304 | struct ks8851_net *ks = netdev_priv(dev); | |
1305 | return mii_link_ok(&ks->mii); | |
1306 | } | |
1307 | ||
1308 | static int ks8851_nway_reset(struct net_device *dev) | |
1309 | { | |
1310 | struct ks8851_net *ks = netdev_priv(dev); | |
1311 | return mii_nway_restart(&ks->mii); | |
1312 | } | |
1313 | ||
a84afa40 SJ |
1314 | static int ks8851_get_eeprom_len(struct net_device *dev) |
1315 | { | |
1316 | struct ks8851_net *ks = netdev_priv(dev); | |
1317 | return ks->eeprom_size; | |
1318 | } | |
1319 | ||
1320 | static int ks8851_get_eeprom(struct net_device *dev, | |
1321 | struct ethtool_eeprom *eeprom, u8 *bytes) | |
1322 | { | |
1323 | struct ks8851_net *ks = netdev_priv(dev); | |
1324 | u16 *eeprom_buff; | |
1325 | int first_word; | |
1326 | int last_word; | |
1327 | int ret_val = 0; | |
1328 | u16 i; | |
1329 | ||
1330 | if (eeprom->len == 0) | |
1331 | return -EINVAL; | |
1332 | ||
1333 | if (eeprom->len > ks->eeprom_size) | |
1334 | return -EINVAL; | |
1335 | ||
1336 | eeprom->magic = ks8851_rdreg16(ks, KS_CIDER); | |
1337 | ||
1338 | first_word = eeprom->offset >> 1; | |
1339 | last_word = (eeprom->offset + eeprom->len - 1) >> 1; | |
1340 | ||
1341 | eeprom_buff = kmalloc(sizeof(u16) * | |
1342 | (last_word - first_word + 1), GFP_KERNEL); | |
1343 | if (!eeprom_buff) | |
1344 | return -ENOMEM; | |
1345 | ||
1346 | for (i = 0; i < last_word - first_word + 1; i++) | |
1347 | eeprom_buff[i] = ks8851_eeprom_read(dev, first_word + 1); | |
1348 | ||
1349 | /* Device's eeprom is little-endian, word addressable */ | |
1350 | for (i = 0; i < last_word - first_word + 1; i++) | |
1351 | le16_to_cpus(&eeprom_buff[i]); | |
1352 | ||
1353 | memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); | |
1354 | kfree(eeprom_buff); | |
1355 | ||
1356 | return ret_val; | |
1357 | } | |
1358 | ||
1359 | static int ks8851_set_eeprom(struct net_device *dev, | |
1360 | struct ethtool_eeprom *eeprom, u8 *bytes) | |
1361 | { | |
1362 | struct ks8851_net *ks = netdev_priv(dev); | |
1363 | u16 *eeprom_buff; | |
1364 | void *ptr; | |
1365 | int max_len; | |
1366 | int first_word; | |
1367 | int last_word; | |
1368 | int ret_val = 0; | |
1369 | u16 i; | |
1370 | ||
1371 | if (eeprom->len == 0) | |
1372 | return -EOPNOTSUPP; | |
1373 | ||
1374 | if (eeprom->len > ks->eeprom_size) | |
1375 | return -EINVAL; | |
1376 | ||
1377 | if (eeprom->magic != ks8851_rdreg16(ks, KS_CIDER)) | |
1378 | return -EFAULT; | |
1379 | ||
1380 | first_word = eeprom->offset >> 1; | |
1381 | last_word = (eeprom->offset + eeprom->len - 1) >> 1; | |
1382 | max_len = (last_word - first_word + 1) * 2; | |
1383 | eeprom_buff = kmalloc(max_len, GFP_KERNEL); | |
1384 | if (!eeprom_buff) | |
1385 | return -ENOMEM; | |
1386 | ||
1387 | ptr = (void *)eeprom_buff; | |
1388 | ||
1389 | if (eeprom->offset & 1) { | |
1390 | /* need read/modify/write of first changed EEPROM word */ | |
1391 | /* only the second byte of the word is being modified */ | |
1392 | eeprom_buff[0] = ks8851_eeprom_read(dev, first_word); | |
1393 | ptr++; | |
1394 | } | |
1395 | if ((eeprom->offset + eeprom->len) & 1) | |
1396 | /* need read/modify/write of last changed EEPROM word */ | |
1397 | /* only the first byte of the word is being modified */ | |
1398 | eeprom_buff[last_word - first_word] = | |
1399 | ks8851_eeprom_read(dev, last_word); | |
1400 | ||
1401 | ||
1402 | /* Device's eeprom is little-endian, word addressable */ | |
1403 | le16_to_cpus(&eeprom_buff[0]); | |
1404 | le16_to_cpus(&eeprom_buff[last_word - first_word]); | |
1405 | ||
1406 | memcpy(ptr, bytes, eeprom->len); | |
1407 | ||
1408 | for (i = 0; i < last_word - first_word + 1; i++) | |
1409 | eeprom_buff[i] = cpu_to_le16(eeprom_buff[i]); | |
1410 | ||
1411 | ks8851_eeprom_write(dev, EEPROM_OP_EWEN, 0, 0); | |
1412 | ||
1413 | for (i = 0; i < last_word - first_word + 1; i++) { | |
1414 | ks8851_eeprom_write(dev, EEPROM_OP_WRITE, first_word + i, | |
1415 | eeprom_buff[i]); | |
1416 | mdelay(EEPROM_WRITE_TIME); | |
1417 | } | |
1418 | ||
1419 | ks8851_eeprom_write(dev, EEPROM_OP_EWDS, 0, 0); | |
1420 | ||
1421 | kfree(eeprom_buff); | |
1422 | return ret_val; | |
1423 | } | |
1424 | ||
3ba81f3e BD |
1425 | static const struct ethtool_ops ks8851_ethtool_ops = { |
1426 | .get_drvinfo = ks8851_get_drvinfo, | |
1427 | .get_msglevel = ks8851_get_msglevel, | |
1428 | .set_msglevel = ks8851_set_msglevel, | |
1429 | .get_settings = ks8851_get_settings, | |
1430 | .set_settings = ks8851_set_settings, | |
1431 | .get_link = ks8851_get_link, | |
1432 | .nway_reset = ks8851_nway_reset, | |
a84afa40 SJ |
1433 | .get_eeprom_len = ks8851_get_eeprom_len, |
1434 | .get_eeprom = ks8851_get_eeprom, | |
1435 | .set_eeprom = ks8851_set_eeprom, | |
3ba81f3e BD |
1436 | }; |
1437 | ||
1438 | /* MII interface controls */ | |
1439 | ||
1440 | /** | |
1441 | * ks8851_phy_reg - convert MII register into a KS8851 register | |
1442 | * @reg: MII register number. | |
1443 | * | |
1444 | * Return the KS8851 register number for the corresponding MII PHY register | |
1445 | * if possible. Return zero if the MII register has no direct mapping to the | |
1446 | * KS8851 register set. | |
1447 | */ | |
1448 | static int ks8851_phy_reg(int reg) | |
1449 | { | |
1450 | switch (reg) { | |
1451 | case MII_BMCR: | |
1452 | return KS_P1MBCR; | |
1453 | case MII_BMSR: | |
1454 | return KS_P1MBSR; | |
1455 | case MII_PHYSID1: | |
1456 | return KS_PHY1ILR; | |
1457 | case MII_PHYSID2: | |
1458 | return KS_PHY1IHR; | |
1459 | case MII_ADVERTISE: | |
1460 | return KS_P1ANAR; | |
1461 | case MII_LPA: | |
1462 | return KS_P1ANLPR; | |
1463 | } | |
1464 | ||
1465 | return 0x0; | |
1466 | } | |
1467 | ||
1468 | /** | |
1469 | * ks8851_phy_read - MII interface PHY register read. | |
1470 | * @dev: The network device the PHY is on. | |
1471 | * @phy_addr: Address of PHY (ignored as we only have one) | |
1472 | * @reg: The register to read. | |
1473 | * | |
1474 | * This call reads data from the PHY register specified in @reg. Since the | |
1475 | * device does not support all the MII registers, the non-existant values | |
1476 | * are always returned as zero. | |
1477 | * | |
1478 | * We return zero for unsupported registers as the MII code does not check | |
1479 | * the value returned for any error status, and simply returns it to the | |
1480 | * caller. The mii-tool that the driver was tested with takes any -ve error | |
1481 | * as real PHY capabilities, thus displaying incorrect data to the user. | |
1482 | */ | |
1483 | static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) | |
1484 | { | |
1485 | struct ks8851_net *ks = netdev_priv(dev); | |
1486 | int ksreg; | |
1487 | int result; | |
1488 | ||
1489 | ksreg = ks8851_phy_reg(reg); | |
1490 | if (!ksreg) | |
1491 | return 0x0; /* no error return allowed, so use zero */ | |
1492 | ||
1493 | mutex_lock(&ks->lock); | |
1494 | result = ks8851_rdreg16(ks, ksreg); | |
1495 | mutex_unlock(&ks->lock); | |
1496 | ||
1497 | return result; | |
1498 | } | |
1499 | ||
1500 | static void ks8851_phy_write(struct net_device *dev, | |
1501 | int phy, int reg, int value) | |
1502 | { | |
1503 | struct ks8851_net *ks = netdev_priv(dev); | |
1504 | int ksreg; | |
1505 | ||
1506 | ksreg = ks8851_phy_reg(reg); | |
1507 | if (ksreg) { | |
1508 | mutex_lock(&ks->lock); | |
1509 | ks8851_wrreg16(ks, ksreg, value); | |
1510 | mutex_unlock(&ks->lock); | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | /** | |
1515 | * ks8851_read_selftest - read the selftest memory info. | |
1516 | * @ks: The device state | |
1517 | * | |
1518 | * Read and check the TX/RX memory selftest information. | |
1519 | */ | |
1520 | static int ks8851_read_selftest(struct ks8851_net *ks) | |
1521 | { | |
1522 | unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; | |
1523 | int ret = 0; | |
1524 | unsigned rd; | |
1525 | ||
1526 | rd = ks8851_rdreg16(ks, KS_MBIR); | |
1527 | ||
1528 | if ((rd & both_done) != both_done) { | |
0dc7d2b3 | 1529 | netdev_warn(ks->netdev, "Memory selftest not finished\n"); |
3ba81f3e BD |
1530 | return 0; |
1531 | } | |
1532 | ||
1533 | if (rd & MBIR_TXMBFA) { | |
0dc7d2b3 | 1534 | netdev_err(ks->netdev, "TX memory selftest fail\n"); |
3ba81f3e BD |
1535 | ret |= 1; |
1536 | } | |
1537 | ||
1538 | if (rd & MBIR_RXMBFA) { | |
0dc7d2b3 | 1539 | netdev_err(ks->netdev, "RX memory selftest fail\n"); |
3ba81f3e BD |
1540 | ret |= 2; |
1541 | } | |
1542 | ||
1543 | return 0; | |
1544 | } | |
1545 | ||
1546 | /* driver bus management functions */ | |
1547 | ||
1d5439b9 AA |
1548 | #ifdef CONFIG_PM |
1549 | static int ks8851_suspend(struct spi_device *spi, pm_message_t state) | |
1550 | { | |
1551 | struct ks8851_net *ks = dev_get_drvdata(&spi->dev); | |
1552 | struct net_device *dev = ks->netdev; | |
1553 | ||
1554 | if (netif_running(dev)) { | |
1555 | netif_device_detach(dev); | |
1556 | ks8851_net_stop(dev); | |
1557 | } | |
1558 | ||
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | static int ks8851_resume(struct spi_device *spi) | |
1563 | { | |
1564 | struct ks8851_net *ks = dev_get_drvdata(&spi->dev); | |
1565 | struct net_device *dev = ks->netdev; | |
1566 | ||
1567 | if (netif_running(dev)) { | |
1568 | ks8851_net_open(dev); | |
1569 | netif_device_attach(dev); | |
1570 | } | |
1571 | ||
1572 | return 0; | |
1573 | } | |
1574 | #else | |
1575 | #define ks8851_suspend NULL | |
1576 | #define ks8851_resume NULL | |
1577 | #endif | |
1578 | ||
3ba81f3e BD |
1579 | static int __devinit ks8851_probe(struct spi_device *spi) |
1580 | { | |
1581 | struct net_device *ndev; | |
1582 | struct ks8851_net *ks; | |
1583 | int ret; | |
1584 | ||
1585 | ndev = alloc_etherdev(sizeof(struct ks8851_net)); | |
1586 | if (!ndev) { | |
1587 | dev_err(&spi->dev, "failed to alloc ethernet device\n"); | |
1588 | return -ENOMEM; | |
1589 | } | |
1590 | ||
1591 | spi->bits_per_word = 8; | |
1592 | ||
1593 | ks = netdev_priv(ndev); | |
1594 | ||
1595 | ks->netdev = ndev; | |
1596 | ks->spidev = spi; | |
1597 | ks->tx_space = 6144; | |
1598 | ||
1599 | mutex_init(&ks->lock); | |
1600 | spin_lock_init(&ks->statelock); | |
1601 | ||
1602 | INIT_WORK(&ks->tx_work, ks8851_tx_work); | |
1603 | INIT_WORK(&ks->irq_work, ks8851_irq_work); | |
1604 | INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); | |
1605 | ||
1606 | /* initialise pre-made spi transfer messages */ | |
1607 | ||
1608 | spi_message_init(&ks->spi_msg1); | |
1609 | spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); | |
1610 | ||
1611 | spi_message_init(&ks->spi_msg2); | |
1612 | spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); | |
1613 | spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); | |
1614 | ||
1615 | /* setup mii state */ | |
1616 | ks->mii.dev = ndev; | |
1617 | ks->mii.phy_id = 1, | |
1618 | ks->mii.phy_id_mask = 1; | |
1619 | ks->mii.reg_num_mask = 0xf; | |
1620 | ks->mii.mdio_read = ks8851_phy_read; | |
1621 | ks->mii.mdio_write = ks8851_phy_write; | |
1622 | ||
1623 | dev_info(&spi->dev, "message enable is %d\n", msg_enable); | |
1624 | ||
1625 | /* set the default message enable */ | |
1626 | ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | | |
1627 | NETIF_MSG_PROBE | | |
1628 | NETIF_MSG_LINK)); | |
1629 | ||
1630 | skb_queue_head_init(&ks->txq); | |
1631 | ||
1632 | SET_ETHTOOL_OPS(ndev, &ks8851_ethtool_ops); | |
1633 | SET_NETDEV_DEV(ndev, &spi->dev); | |
1634 | ||
1635 | dev_set_drvdata(&spi->dev, ks); | |
1636 | ||
1637 | ndev->if_port = IF_PORT_100BASET; | |
1638 | ndev->netdev_ops = &ks8851_netdev_ops; | |
1639 | ndev->irq = spi->irq; | |
1640 | ||
57dada68 BD |
1641 | /* issue a global soft reset to reset the device. */ |
1642 | ks8851_soft_reset(ks, GRR_GSR); | |
1643 | ||
3ba81f3e BD |
1644 | /* simple check for a valid chip being connected to the bus */ |
1645 | ||
1646 | if ((ks8851_rdreg16(ks, KS_CIDER) & ~CIDER_REV_MASK) != CIDER_ID) { | |
1647 | dev_err(&spi->dev, "failed to read device ID\n"); | |
1648 | ret = -ENODEV; | |
1649 | goto err_id; | |
1650 | } | |
1651 | ||
7d997466 SJ |
1652 | /* cache the contents of the CCR register for EEPROM, etc. */ |
1653 | ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); | |
1654 | ||
1655 | if (ks->rc_ccr & CCR_EEPROM) | |
1656 | ks->eeprom_size = 128; | |
1657 | else | |
1658 | ks->eeprom_size = 0; | |
1659 | ||
3ba81f3e BD |
1660 | ks8851_read_selftest(ks); |
1661 | ks8851_init_mac(ks); | |
1662 | ||
1663 | ret = request_irq(spi->irq, ks8851_irq, IRQF_TRIGGER_LOW, | |
1664 | ndev->name, ks); | |
1665 | if (ret < 0) { | |
1666 | dev_err(&spi->dev, "failed to get irq\n"); | |
1667 | goto err_irq; | |
1668 | } | |
1669 | ||
1670 | ret = register_netdev(ndev); | |
1671 | if (ret) { | |
1672 | dev_err(&spi->dev, "failed to register network device\n"); | |
1673 | goto err_netdev; | |
1674 | } | |
1675 | ||
0dc7d2b3 JP |
1676 | netdev_info(ndev, "revision %d, MAC %pM, IRQ %d\n", |
1677 | CIDER_REV_GET(ks8851_rdreg16(ks, KS_CIDER)), | |
1678 | ndev->dev_addr, ndev->irq); | |
3ba81f3e BD |
1679 | |
1680 | return 0; | |
1681 | ||
1682 | ||
1683 | err_netdev: | |
1684 | free_irq(ndev->irq, ndev); | |
1685 | ||
1686 | err_id: | |
1687 | err_irq: | |
1688 | free_netdev(ndev); | |
1689 | return ret; | |
1690 | } | |
1691 | ||
1692 | static int __devexit ks8851_remove(struct spi_device *spi) | |
1693 | { | |
1694 | struct ks8851_net *priv = dev_get_drvdata(&spi->dev); | |
1695 | ||
1696 | if (netif_msg_drv(priv)) | |
0dc7d2b3 | 1697 | dev_info(&spi->dev, "remove\n"); |
3ba81f3e BD |
1698 | |
1699 | unregister_netdev(priv->netdev); | |
1700 | free_irq(spi->irq, priv); | |
1701 | free_netdev(priv->netdev); | |
1702 | ||
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static struct spi_driver ks8851_driver = { | |
1707 | .driver = { | |
1708 | .name = "ks8851", | |
1709 | .owner = THIS_MODULE, | |
1710 | }, | |
1711 | .probe = ks8851_probe, | |
1712 | .remove = __devexit_p(ks8851_remove), | |
1d5439b9 AA |
1713 | .suspend = ks8851_suspend, |
1714 | .resume = ks8851_resume, | |
3ba81f3e BD |
1715 | }; |
1716 | ||
1717 | static int __init ks8851_init(void) | |
1718 | { | |
1719 | return spi_register_driver(&ks8851_driver); | |
1720 | } | |
1721 | ||
1722 | static void __exit ks8851_exit(void) | |
1723 | { | |
1724 | spi_unregister_driver(&ks8851_driver); | |
1725 | } | |
1726 | ||
1727 | module_init(ks8851_init); | |
1728 | module_exit(ks8851_exit); | |
1729 | ||
1730 | MODULE_DESCRIPTION("KS8851 Network driver"); | |
1731 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
1732 | MODULE_LICENSE("GPL"); | |
1733 | ||
1734 | module_param_named(message, msg_enable, int, 0); | |
1735 | MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); | |
e0626e38 | 1736 | MODULE_ALIAS("spi:ks8851"); |