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3396c782 | 1 | /* drivers/net/ethernet/micrel/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 | ||
a6b7a407 | 16 | #include <linux/interrupt.h> |
3ba81f3e BD |
17 | #include <linux/module.h> |
18 | #include <linux/kernel.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/ethtool.h> | |
22 | #include <linux/cache.h> | |
23 | #include <linux/crc32.h> | |
24 | #include <linux/mii.h> | |
51b7b1c3 | 25 | #include <linux/eeprom_93cx6.h> |
ebf4ad95 | 26 | #include <linux/regulator/consumer.h> |
3ba81f3e BD |
27 | |
28 | #include <linux/spi/spi.h> | |
29 | ||
30 | #include "ks8851.h" | |
31 | ||
32 | /** | |
33 | * struct ks8851_rxctrl - KS8851 driver rx control | |
34 | * @mchash: Multicast hash-table data. | |
35 | * @rxcr1: KS_RXCR1 register setting | |
36 | * @rxcr2: KS_RXCR2 register setting | |
37 | * | |
38 | * Representation of the settings needs to control the receive filtering | |
39 | * such as the multicast hash-filter and the receive register settings. This | |
40 | * is used to make the job of working out if the receive settings change and | |
41 | * then issuing the new settings to the worker that will send the necessary | |
42 | * commands. | |
43 | */ | |
44 | struct ks8851_rxctrl { | |
45 | u16 mchash[4]; | |
46 | u16 rxcr1; | |
47 | u16 rxcr2; | |
48 | }; | |
49 | ||
50 | /** | |
51 | * union ks8851_tx_hdr - tx header data | |
52 | * @txb: The header as bytes | |
53 | * @txw: The header as 16bit, little-endian words | |
54 | * | |
55 | * A dual representation of the tx header data to allow | |
56 | * access to individual bytes, and to allow 16bit accesses | |
57 | * with 16bit alignment. | |
58 | */ | |
59 | union ks8851_tx_hdr { | |
60 | u8 txb[6]; | |
61 | __le16 txw[3]; | |
62 | }; | |
63 | ||
64 | /** | |
65 | * struct ks8851_net - KS8851 driver private data | |
66 | * @netdev: The network device we're bound to | |
67 | * @spidev: The spi device we're bound to. | |
68 | * @lock: Lock to ensure that the device is not accessed when busy. | |
69 | * @statelock: Lock on this structure for tx list. | |
70 | * @mii: The MII state information for the mii calls. | |
71 | * @rxctrl: RX settings for @rxctrl_work. | |
72 | * @tx_work: Work queue for tx packets | |
3ba81f3e BD |
73 | * @rxctrl_work: Work queue for updating RX mode and multicast lists |
74 | * @txq: Queue of packets for transmission. | |
75 | * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. | |
76 | * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. | |
77 | * @txh: Space for generating packet TX header in DMA-able data | |
78 | * @rxd: Space for receiving SPI data, in DMA-able space. | |
79 | * @txd: Space for transmitting SPI data, in DMA-able space. | |
80 | * @msg_enable: The message flags controlling driver output (see ethtool). | |
81 | * @fid: Incrementing frame id tag. | |
82 | * @rc_ier: Cached copy of KS_IER. | |
7d997466 | 83 | * @rc_ccr: Cached copy of KS_CCR. |
3ba81f3e | 84 | * @rc_rxqcr: Cached copy of KS_RXQCR. |
7d997466 | 85 | * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom |
51b7b1c3 | 86 | * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. |
ebf4ad95 | 87 | * @vdd_reg: Optional regulator supplying the chip |
3ba81f3e BD |
88 | * |
89 | * The @lock ensures that the chip is protected when certain operations are | |
90 | * in progress. When the read or write packet transfer is in progress, most | |
91 | * of the chip registers are not ccessible until the transfer is finished and | |
92 | * the DMA has been de-asserted. | |
93 | * | |
94 | * The @statelock is used to protect information in the structure which may | |
95 | * need to be accessed via several sources, such as the network driver layer | |
96 | * or one of the work queues. | |
97 | * | |
98 | * We align the buffers we may use for rx/tx to ensure that if the SPI driver | |
99 | * wants to DMA map them, it will not have any problems with data the driver | |
100 | * modifies. | |
101 | */ | |
102 | struct ks8851_net { | |
103 | struct net_device *netdev; | |
104 | struct spi_device *spidev; | |
105 | struct mutex lock; | |
106 | spinlock_t statelock; | |
107 | ||
108 | union ks8851_tx_hdr txh ____cacheline_aligned; | |
109 | u8 rxd[8]; | |
110 | u8 txd[8]; | |
111 | ||
112 | u32 msg_enable ____cacheline_aligned; | |
113 | u16 tx_space; | |
114 | u8 fid; | |
115 | ||
116 | u16 rc_ier; | |
117 | u16 rc_rxqcr; | |
7d997466 SJ |
118 | u16 rc_ccr; |
119 | u16 eeprom_size; | |
3ba81f3e BD |
120 | |
121 | struct mii_if_info mii; | |
122 | struct ks8851_rxctrl rxctrl; | |
123 | ||
124 | struct work_struct tx_work; | |
3ba81f3e BD |
125 | struct work_struct rxctrl_work; |
126 | ||
127 | struct sk_buff_head txq; | |
128 | ||
129 | struct spi_message spi_msg1; | |
130 | struct spi_message spi_msg2; | |
131 | struct spi_transfer spi_xfer1; | |
132 | struct spi_transfer spi_xfer2[2]; | |
51b7b1c3 BD |
133 | |
134 | struct eeprom_93cx6 eeprom; | |
ebf4ad95 | 135 | struct regulator *vdd_reg; |
3ba81f3e BD |
136 | }; |
137 | ||
138 | static int msg_enable; | |
139 | ||
3ba81f3e BD |
140 | /* shift for byte-enable data */ |
141 | #define BYTE_EN(_x) ((_x) << 2) | |
142 | ||
143 | /* turn register number and byte-enable mask into data for start of packet */ | |
144 | #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) | |
145 | ||
146 | /* SPI register read/write calls. | |
147 | * | |
148 | * All these calls issue SPI transactions to access the chip's registers. They | |
149 | * all require that the necessary lock is held to prevent accesses when the | |
25985edc | 150 | * chip is busy transferring packet data (RX/TX FIFO accesses). |
3ba81f3e BD |
151 | */ |
152 | ||
153 | /** | |
154 | * ks8851_wrreg16 - write 16bit register value to chip | |
155 | * @ks: The chip state | |
156 | * @reg: The register address | |
157 | * @val: The value to write | |
158 | * | |
159 | * Issue a write to put the value @val into the register specified in @reg. | |
160 | */ | |
161 | static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) | |
162 | { | |
163 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
164 | struct spi_message *msg = &ks->spi_msg1; | |
165 | __le16 txb[2]; | |
166 | int ret; | |
167 | ||
168 | txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); | |
169 | txb[1] = cpu_to_le16(val); | |
170 | ||
171 | xfer->tx_buf = txb; | |
172 | xfer->rx_buf = NULL; | |
173 | xfer->len = 4; | |
174 | ||
175 | ret = spi_sync(ks->spidev, msg); | |
176 | if (ret < 0) | |
0dc7d2b3 | 177 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
3ba81f3e BD |
178 | } |
179 | ||
160d0fad BD |
180 | /** |
181 | * ks8851_wrreg8 - write 8bit register value to chip | |
182 | * @ks: The chip state | |
183 | * @reg: The register address | |
184 | * @val: The value to write | |
185 | * | |
186 | * Issue a write to put the value @val into the register specified in @reg. | |
187 | */ | |
188 | static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) | |
189 | { | |
190 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
191 | struct spi_message *msg = &ks->spi_msg1; | |
192 | __le16 txb[2]; | |
193 | int ret; | |
194 | int bit; | |
195 | ||
196 | bit = 1 << (reg & 3); | |
197 | ||
198 | txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); | |
199 | txb[1] = val; | |
200 | ||
201 | xfer->tx_buf = txb; | |
202 | xfer->rx_buf = NULL; | |
203 | xfer->len = 3; | |
204 | ||
205 | ret = spi_sync(ks->spidev, msg); | |
206 | if (ret < 0) | |
0dc7d2b3 | 207 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
160d0fad BD |
208 | } |
209 | ||
3ba81f3e BD |
210 | /** |
211 | * ks8851_rx_1msg - select whether to use one or two messages for spi read | |
212 | * @ks: The device structure | |
213 | * | |
214 | * Return whether to generate a single message with a tx and rx buffer | |
215 | * supplied to spi_sync(), or alternatively send the tx and rx buffers | |
216 | * as separate messages. | |
217 | * | |
218 | * Depending on the hardware in use, a single message may be more efficient | |
219 | * on interrupts or work done by the driver. | |
220 | * | |
221 | * This currently always returns true until we add some per-device data passed | |
222 | * from the platform code to specify which mode is better. | |
223 | */ | |
224 | static inline bool ks8851_rx_1msg(struct ks8851_net *ks) | |
225 | { | |
226 | return true; | |
227 | } | |
228 | ||
229 | /** | |
230 | * ks8851_rdreg - issue read register command and return the data | |
231 | * @ks: The device state | |
232 | * @op: The register address and byte enables in message format. | |
233 | * @rxb: The RX buffer to return the result into | |
234 | * @rxl: The length of data expected. | |
235 | * | |
236 | * This is the low level read call that issues the necessary spi message(s) | |
237 | * to read data from the register specified in @op. | |
238 | */ | |
239 | static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, | |
240 | u8 *rxb, unsigned rxl) | |
241 | { | |
242 | struct spi_transfer *xfer; | |
243 | struct spi_message *msg; | |
244 | __le16 *txb = (__le16 *)ks->txd; | |
245 | u8 *trx = ks->rxd; | |
246 | int ret; | |
247 | ||
248 | txb[0] = cpu_to_le16(op | KS_SPIOP_RD); | |
249 | ||
250 | if (ks8851_rx_1msg(ks)) { | |
251 | msg = &ks->spi_msg1; | |
252 | xfer = &ks->spi_xfer1; | |
253 | ||
254 | xfer->tx_buf = txb; | |
255 | xfer->rx_buf = trx; | |
256 | xfer->len = rxl + 2; | |
257 | } else { | |
258 | msg = &ks->spi_msg2; | |
259 | xfer = ks->spi_xfer2; | |
260 | ||
261 | xfer->tx_buf = txb; | |
262 | xfer->rx_buf = NULL; | |
263 | xfer->len = 2; | |
264 | ||
265 | xfer++; | |
266 | xfer->tx_buf = NULL; | |
267 | xfer->rx_buf = trx; | |
268 | xfer->len = rxl; | |
269 | } | |
270 | ||
271 | ret = spi_sync(ks->spidev, msg); | |
272 | if (ret < 0) | |
0dc7d2b3 | 273 | netdev_err(ks->netdev, "read: spi_sync() failed\n"); |
3ba81f3e BD |
274 | else if (ks8851_rx_1msg(ks)) |
275 | memcpy(rxb, trx + 2, rxl); | |
276 | else | |
277 | memcpy(rxb, trx, rxl); | |
278 | } | |
279 | ||
280 | /** | |
281 | * ks8851_rdreg8 - read 8 bit register from device | |
282 | * @ks: The chip information | |
283 | * @reg: The register address | |
284 | * | |
285 | * Read a 8bit register from the chip, returning the result | |
286 | */ | |
287 | static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) | |
288 | { | |
289 | u8 rxb[1]; | |
290 | ||
291 | ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); | |
292 | return rxb[0]; | |
293 | } | |
294 | ||
295 | /** | |
296 | * ks8851_rdreg16 - read 16 bit register from device | |
297 | * @ks: The chip information | |
298 | * @reg: The register address | |
299 | * | |
300 | * Read a 16bit register from the chip, returning the result | |
301 | */ | |
302 | static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) | |
303 | { | |
304 | __le16 rx = 0; | |
305 | ||
306 | ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); | |
307 | return le16_to_cpu(rx); | |
308 | } | |
309 | ||
310 | /** | |
311 | * ks8851_rdreg32 - read 32 bit register from device | |
312 | * @ks: The chip information | |
313 | * @reg: The register address | |
314 | * | |
315 | * Read a 32bit register from the chip. | |
316 | * | |
317 | * Note, this read requires the address be aligned to 4 bytes. | |
318 | */ | |
319 | static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) | |
320 | { | |
321 | __le32 rx = 0; | |
322 | ||
323 | WARN_ON(reg & 3); | |
324 | ||
325 | ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); | |
326 | return le32_to_cpu(rx); | |
327 | } | |
328 | ||
329 | /** | |
330 | * ks8851_soft_reset - issue one of the soft reset to the device | |
331 | * @ks: The device state. | |
332 | * @op: The bit(s) to set in the GRR | |
333 | * | |
334 | * Issue the relevant soft-reset command to the device's GRR register | |
335 | * specified by @op. | |
336 | * | |
337 | * Note, the delays are in there as a caution to ensure that the reset | |
338 | * has time to take effect and then complete. Since the datasheet does | |
339 | * not currently specify the exact sequence, we have chosen something | |
340 | * that seems to work with our device. | |
341 | */ | |
342 | static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) | |
343 | { | |
344 | ks8851_wrreg16(ks, KS_GRR, op); | |
345 | mdelay(1); /* wait a short time to effect reset */ | |
346 | ks8851_wrreg16(ks, KS_GRR, 0); | |
347 | mdelay(1); /* wait for condition to clear */ | |
348 | } | |
349 | ||
32f160d9 TH |
350 | /** |
351 | * ks8851_set_powermode - set power mode of the device | |
352 | * @ks: The device state | |
353 | * @pwrmode: The power mode value to write to KS_PMECR. | |
354 | * | |
355 | * Change the power mode of the chip. | |
356 | */ | |
357 | static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) | |
358 | { | |
359 | unsigned pmecr; | |
360 | ||
361 | netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); | |
362 | ||
363 | pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
364 | pmecr &= ~PMECR_PM_MASK; | |
365 | pmecr |= pwrmode; | |
366 | ||
367 | ks8851_wrreg16(ks, KS_PMECR, pmecr); | |
368 | } | |
369 | ||
3ba81f3e BD |
370 | /** |
371 | * ks8851_write_mac_addr - write mac address to device registers | |
372 | * @dev: The network device | |
373 | * | |
374 | * Update the KS8851 MAC address registers from the address in @dev. | |
375 | * | |
376 | * This call assumes that the chip is not running, so there is no need to | |
377 | * shutdown the RXQ process whilst setting this. | |
378 | */ | |
379 | static int ks8851_write_mac_addr(struct net_device *dev) | |
380 | { | |
381 | struct ks8851_net *ks = netdev_priv(dev); | |
160d0fad | 382 | int i; |
3ba81f3e BD |
383 | |
384 | mutex_lock(&ks->lock); | |
385 | ||
32f160d9 TH |
386 | /* |
387 | * Wake up chip in case it was powered off when stopped; otherwise, | |
388 | * the first write to the MAC address does not take effect. | |
389 | */ | |
390 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
160d0fad BD |
391 | for (i = 0; i < ETH_ALEN; i++) |
392 | ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); | |
32f160d9 TH |
393 | if (!netif_running(dev)) |
394 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
3ba81f3e BD |
395 | |
396 | mutex_unlock(&ks->lock); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
a9a8de21 BD |
401 | /** |
402 | * ks8851_read_mac_addr - read mac address from device registers | |
403 | * @dev: The network device | |
404 | * | |
405 | * Update our copy of the KS8851 MAC address from the registers of @dev. | |
406 | */ | |
407 | static void ks8851_read_mac_addr(struct net_device *dev) | |
408 | { | |
409 | struct ks8851_net *ks = netdev_priv(dev); | |
410 | int i; | |
411 | ||
412 | mutex_lock(&ks->lock); | |
413 | ||
414 | for (i = 0; i < ETH_ALEN; i++) | |
415 | dev->dev_addr[i] = ks8851_rdreg8(ks, KS_MAR(i)); | |
416 | ||
417 | mutex_unlock(&ks->lock); | |
418 | } | |
419 | ||
3ba81f3e BD |
420 | /** |
421 | * ks8851_init_mac - initialise the mac address | |
422 | * @ks: The device structure | |
423 | * | |
424 | * Get or create the initial mac address for the device and then set that | |
a9a8de21 | 425 | * into the station address register. If there is an EEPROM present, then |
7efd26d0 | 426 | * we try that. If no valid mac address is found we use eth_random_addr() |
3ba81f3e | 427 | * to create a new one. |
3ba81f3e BD |
428 | */ |
429 | static void ks8851_init_mac(struct ks8851_net *ks) | |
430 | { | |
431 | struct net_device *dev = ks->netdev; | |
432 | ||
a9a8de21 BD |
433 | /* first, try reading what we've got already */ |
434 | if (ks->rc_ccr & CCR_EEPROM) { | |
435 | ks8851_read_mac_addr(dev); | |
436 | if (is_valid_ether_addr(dev->dev_addr)) | |
437 | return; | |
438 | ||
439 | netdev_err(ks->netdev, "invalid mac address read %pM\n", | |
440 | dev->dev_addr); | |
441 | } | |
442 | ||
7ce5d222 | 443 | eth_hw_addr_random(dev); |
3ba81f3e BD |
444 | ks8851_write_mac_addr(dev); |
445 | } | |
446 | ||
3ba81f3e BD |
447 | /** |
448 | * ks8851_rdfifo - read data from the receive fifo | |
449 | * @ks: The device state. | |
450 | * @buff: The buffer address | |
451 | * @len: The length of the data to read | |
452 | * | |
9ddc5b6f | 453 | * Issue an RXQ FIFO read command and read the @len amount of data from |
3ba81f3e BD |
454 | * the FIFO into the buffer specified by @buff. |
455 | */ | |
456 | static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) | |
457 | { | |
458 | struct spi_transfer *xfer = ks->spi_xfer2; | |
459 | struct spi_message *msg = &ks->spi_msg2; | |
460 | u8 txb[1]; | |
461 | int ret; | |
462 | ||
0dc7d2b3 JP |
463 | netif_dbg(ks, rx_status, ks->netdev, |
464 | "%s: %d@%p\n", __func__, len, buff); | |
3ba81f3e BD |
465 | |
466 | /* set the operation we're issuing */ | |
467 | txb[0] = KS_SPIOP_RXFIFO; | |
468 | ||
469 | xfer->tx_buf = txb; | |
470 | xfer->rx_buf = NULL; | |
471 | xfer->len = 1; | |
472 | ||
473 | xfer++; | |
474 | xfer->rx_buf = buff; | |
475 | xfer->tx_buf = NULL; | |
476 | xfer->len = len; | |
477 | ||
478 | ret = spi_sync(ks->spidev, msg); | |
479 | if (ret < 0) | |
0dc7d2b3 | 480 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
481 | } |
482 | ||
483 | /** | |
484 | * ks8851_dbg_dumpkkt - dump initial packet contents to debug | |
485 | * @ks: The device state | |
486 | * @rxpkt: The data for the received packet | |
487 | * | |
488 | * Dump the initial data from the packet to dev_dbg(). | |
489 | */ | |
490 | static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) | |
491 | { | |
0dc7d2b3 JP |
492 | netdev_dbg(ks->netdev, |
493 | "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", | |
494 | rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], | |
495 | rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], | |
496 | rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); | |
3ba81f3e BD |
497 | } |
498 | ||
499 | /** | |
500 | * ks8851_rx_pkts - receive packets from the host | |
501 | * @ks: The device information. | |
502 | * | |
503 | * This is called from the IRQ work queue when the system detects that there | |
504 | * are packets in the receive queue. Find out how many packets there are and | |
505 | * read them from the FIFO. | |
506 | */ | |
507 | static void ks8851_rx_pkts(struct ks8851_net *ks) | |
508 | { | |
509 | struct sk_buff *skb; | |
510 | unsigned rxfc; | |
511 | unsigned rxlen; | |
512 | unsigned rxstat; | |
513 | u32 rxh; | |
514 | u8 *rxpkt; | |
515 | ||
516 | rxfc = ks8851_rdreg8(ks, KS_RXFC); | |
517 | ||
0dc7d2b3 JP |
518 | netif_dbg(ks, rx_status, ks->netdev, |
519 | "%s: %d packets\n", __func__, rxfc); | |
3ba81f3e BD |
520 | |
521 | /* Currently we're issuing a read per packet, but we could possibly | |
522 | * improve the code by issuing a single read, getting the receive | |
523 | * header, allocating the packet and then reading the packet data | |
524 | * out in one go. | |
525 | * | |
526 | * This form of operation would require us to hold the SPI bus' | |
527 | * chipselect low during the entie transaction to avoid any | |
25985edc | 528 | * reset to the data stream coming from the chip. |
3ba81f3e BD |
529 | */ |
530 | ||
531 | for (; rxfc != 0; rxfc--) { | |
532 | rxh = ks8851_rdreg32(ks, KS_RXFHSR); | |
533 | rxstat = rxh & 0xffff; | |
14bc435e | 534 | rxlen = (rxh >> 16) & 0xfff; |
3ba81f3e | 535 | |
0dc7d2b3 JP |
536 | netif_dbg(ks, rx_status, ks->netdev, |
537 | "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); | |
3ba81f3e BD |
538 | |
539 | /* the length of the packet includes the 32bit CRC */ | |
540 | ||
541 | /* set dma read address */ | |
542 | ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); | |
543 | ||
544 | /* start the packet dma process, and set auto-dequeue rx */ | |
545 | ks8851_wrreg16(ks, KS_RXQCR, | |
546 | ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); | |
547 | ||
972c40b5 ED |
548 | if (rxlen > 4) { |
549 | unsigned int rxalign; | |
550 | ||
551 | rxlen -= 4; | |
552 | rxalign = ALIGN(rxlen, 4); | |
553 | skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); | |
554 | if (skb) { | |
3ba81f3e | 555 | |
972c40b5 ED |
556 | /* 4 bytes of status header + 4 bytes of |
557 | * garbage: we put them before ethernet | |
558 | * header, so that they are copied, | |
559 | * but ignored. | |
560 | */ | |
3ba81f3e | 561 | |
972c40b5 | 562 | rxpkt = skb_put(skb, rxlen) - 8; |
3ba81f3e | 563 | |
972c40b5 | 564 | ks8851_rdfifo(ks, rxpkt, rxalign + 8); |
3ba81f3e | 565 | |
972c40b5 ED |
566 | if (netif_msg_pktdata(ks)) |
567 | ks8851_dbg_dumpkkt(ks, rxpkt); | |
3ba81f3e | 568 | |
972c40b5 | 569 | skb->protocol = eth_type_trans(skb, ks->netdev); |
fbcf88b8 | 570 | netif_rx_ni(skb); |
3ba81f3e | 571 | |
972c40b5 ED |
572 | ks->netdev->stats.rx_packets++; |
573 | ks->netdev->stats.rx_bytes += rxlen; | |
574 | } | |
3ba81f3e BD |
575 | } |
576 | ||
577 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
578 | } | |
579 | } | |
580 | ||
581 | /** | |
656a05c8 FB |
582 | * ks8851_irq - IRQ handler for dealing with interrupt requests |
583 | * @irq: IRQ number | |
584 | * @_ks: cookie | |
3ba81f3e | 585 | * |
656a05c8 FB |
586 | * This handler is invoked when the IRQ line asserts to find out what happened. |
587 | * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs | |
588 | * in thread context. | |
3ba81f3e BD |
589 | * |
590 | * Read the interrupt status, work out what needs to be done and then clear | |
591 | * any of the interrupts that are not needed. | |
592 | */ | |
656a05c8 | 593 | static irqreturn_t ks8851_irq(int irq, void *_ks) |
3ba81f3e | 594 | { |
656a05c8 | 595 | struct ks8851_net *ks = _ks; |
3ba81f3e BD |
596 | unsigned status; |
597 | unsigned handled = 0; | |
598 | ||
599 | mutex_lock(&ks->lock); | |
600 | ||
601 | status = ks8851_rdreg16(ks, KS_ISR); | |
602 | ||
0dc7d2b3 JP |
603 | netif_dbg(ks, intr, ks->netdev, |
604 | "%s: status 0x%04x\n", __func__, status); | |
3ba81f3e | 605 | |
062e55e3 | 606 | if (status & IRQ_LCI) |
3ba81f3e | 607 | handled |= IRQ_LCI; |
3ba81f3e BD |
608 | |
609 | if (status & IRQ_LDI) { | |
610 | u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
611 | pmecr &= ~PMECR_WKEVT_MASK; | |
612 | ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); | |
613 | ||
614 | handled |= IRQ_LDI; | |
615 | } | |
616 | ||
617 | if (status & IRQ_RXPSI) | |
618 | handled |= IRQ_RXPSI; | |
619 | ||
620 | if (status & IRQ_TXI) { | |
621 | handled |= IRQ_TXI; | |
622 | ||
623 | /* no lock here, tx queue should have been stopped */ | |
624 | ||
625 | /* update our idea of how much tx space is available to the | |
626 | * system */ | |
627 | ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); | |
628 | ||
0dc7d2b3 JP |
629 | netif_dbg(ks, intr, ks->netdev, |
630 | "%s: txspace %d\n", __func__, ks->tx_space); | |
3ba81f3e BD |
631 | } |
632 | ||
633 | if (status & IRQ_RXI) | |
634 | handled |= IRQ_RXI; | |
635 | ||
636 | if (status & IRQ_SPIBEI) { | |
637 | dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); | |
638 | handled |= IRQ_SPIBEI; | |
639 | } | |
640 | ||
641 | ks8851_wrreg16(ks, KS_ISR, handled); | |
642 | ||
643 | if (status & IRQ_RXI) { | |
644 | /* the datasheet says to disable the rx interrupt during | |
645 | * packet read-out, however we're masking the interrupt | |
646 | * from the device so do not bother masking just the RX | |
647 | * from the device. */ | |
648 | ||
649 | ks8851_rx_pkts(ks); | |
650 | } | |
651 | ||
652 | /* if something stopped the rx process, probably due to wanting | |
653 | * to change the rx settings, then do something about restarting | |
654 | * it. */ | |
655 | if (status & IRQ_RXPSI) { | |
656 | struct ks8851_rxctrl *rxc = &ks->rxctrl; | |
657 | ||
658 | /* update the multicast hash table */ | |
659 | ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); | |
660 | ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); | |
661 | ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); | |
662 | ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); | |
663 | ||
664 | ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); | |
665 | ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); | |
666 | } | |
667 | ||
668 | mutex_unlock(&ks->lock); | |
669 | ||
062e55e3 SB |
670 | if (status & IRQ_LCI) |
671 | mii_check_link(&ks->mii); | |
672 | ||
3ba81f3e BD |
673 | if (status & IRQ_TXI) |
674 | netif_wake_queue(ks->netdev); | |
675 | ||
656a05c8 | 676 | return IRQ_HANDLED; |
3ba81f3e BD |
677 | } |
678 | ||
679 | /** | |
680 | * calc_txlen - calculate size of message to send packet | |
25985edc | 681 | * @len: Length of data |
3ba81f3e BD |
682 | * |
683 | * Returns the size of the TXFIFO message needed to send | |
684 | * this packet. | |
685 | */ | |
686 | static inline unsigned calc_txlen(unsigned len) | |
687 | { | |
688 | return ALIGN(len + 4, 4); | |
689 | } | |
690 | ||
691 | /** | |
692 | * ks8851_wrpkt - write packet to TX FIFO | |
693 | * @ks: The device state. | |
694 | * @txp: The sk_buff to transmit. | |
695 | * @irq: IRQ on completion of the packet. | |
696 | * | |
697 | * Send the @txp to the chip. This means creating the relevant packet header | |
698 | * specifying the length of the packet and the other information the chip | |
699 | * needs, such as IRQ on completion. Send the header and the packet data to | |
700 | * the device. | |
701 | */ | |
702 | static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) | |
703 | { | |
704 | struct spi_transfer *xfer = ks->spi_xfer2; | |
705 | struct spi_message *msg = &ks->spi_msg2; | |
706 | unsigned fid = 0; | |
707 | int ret; | |
708 | ||
0dc7d2b3 JP |
709 | netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", |
710 | __func__, txp, txp->len, txp->data, irq); | |
3ba81f3e BD |
711 | |
712 | fid = ks->fid++; | |
713 | fid &= TXFR_TXFID_MASK; | |
714 | ||
715 | if (irq) | |
716 | fid |= TXFR_TXIC; /* irq on completion */ | |
717 | ||
718 | /* start header at txb[1] to align txw entries */ | |
719 | ks->txh.txb[1] = KS_SPIOP_TXFIFO; | |
720 | ks->txh.txw[1] = cpu_to_le16(fid); | |
721 | ks->txh.txw[2] = cpu_to_le16(txp->len); | |
722 | ||
723 | xfer->tx_buf = &ks->txh.txb[1]; | |
724 | xfer->rx_buf = NULL; | |
725 | xfer->len = 5; | |
726 | ||
727 | xfer++; | |
728 | xfer->tx_buf = txp->data; | |
729 | xfer->rx_buf = NULL; | |
730 | xfer->len = ALIGN(txp->len, 4); | |
731 | ||
732 | ret = spi_sync(ks->spidev, msg); | |
733 | if (ret < 0) | |
0dc7d2b3 | 734 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
735 | } |
736 | ||
737 | /** | |
738 | * ks8851_done_tx - update and then free skbuff after transmitting | |
739 | * @ks: The device state | |
740 | * @txb: The buffer transmitted | |
741 | */ | |
742 | static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) | |
743 | { | |
744 | struct net_device *dev = ks->netdev; | |
745 | ||
746 | dev->stats.tx_bytes += txb->len; | |
747 | dev->stats.tx_packets++; | |
748 | ||
749 | dev_kfree_skb(txb); | |
750 | } | |
751 | ||
752 | /** | |
753 | * ks8851_tx_work - process tx packet(s) | |
754 | * @work: The work strucutre what was scheduled. | |
755 | * | |
756 | * This is called when a number of packets have been scheduled for | |
757 | * transmission and need to be sent to the device. | |
758 | */ | |
759 | static void ks8851_tx_work(struct work_struct *work) | |
760 | { | |
761 | struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); | |
762 | struct sk_buff *txb; | |
3320eae5 | 763 | bool last = skb_queue_empty(&ks->txq); |
3ba81f3e BD |
764 | |
765 | mutex_lock(&ks->lock); | |
766 | ||
767 | while (!last) { | |
768 | txb = skb_dequeue(&ks->txq); | |
769 | last = skb_queue_empty(&ks->txq); | |
770 | ||
761172fb AA |
771 | if (txb != NULL) { |
772 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); | |
773 | ks8851_wrpkt(ks, txb, last); | |
774 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
775 | ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); | |
3ba81f3e | 776 | |
761172fb AA |
777 | ks8851_done_tx(ks, txb); |
778 | } | |
3ba81f3e BD |
779 | } |
780 | ||
781 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
782 | } |
783 | ||
784 | /** | |
785 | * ks8851_net_open - open network device | |
786 | * @dev: The network device being opened. | |
787 | * | |
788 | * Called when the network device is marked active, such as a user executing | |
789 | * 'ifconfig up' on the device. | |
790 | */ | |
791 | static int ks8851_net_open(struct net_device *dev) | |
792 | { | |
793 | struct ks8851_net *ks = netdev_priv(dev); | |
794 | ||
795 | /* lock the card, even if we may not actually be doing anything | |
796 | * else at the moment */ | |
797 | mutex_lock(&ks->lock); | |
798 | ||
0dc7d2b3 | 799 | netif_dbg(ks, ifup, ks->netdev, "opening\n"); |
3ba81f3e BD |
800 | |
801 | /* bring chip out of any power saving mode it was in */ | |
802 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
803 | ||
804 | /* issue a soft reset to the RX/TX QMU to put it into a known | |
805 | * state. */ | |
806 | ks8851_soft_reset(ks, GRR_QMU); | |
807 | ||
808 | /* setup transmission parameters */ | |
809 | ||
810 | ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ | |
811 | TXCR_TXPE | /* pad to min length */ | |
812 | TXCR_TXCRC | /* add CRC */ | |
813 | TXCR_TXFCE)); /* enable flow control */ | |
814 | ||
815 | /* auto-increment tx data, reset tx pointer */ | |
816 | ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); | |
817 | ||
818 | /* setup receiver control */ | |
819 | ||
820 | ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ | |
821 | RXCR1_RXFCE | /* enable flow control */ | |
822 | RXCR1_RXBE | /* broadcast enable */ | |
823 | RXCR1_RXUE | /* unicast enable */ | |
824 | RXCR1_RXE)); /* enable rx block */ | |
825 | ||
826 | /* transfer entire frames out in one go */ | |
827 | ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); | |
828 | ||
829 | /* set receive counter timeouts */ | |
830 | ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ | |
831 | ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ | |
832 | ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ | |
833 | ||
834 | ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ | |
835 | RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ | |
836 | RXQCR_RXDTTE); /* IRQ on time exceeded */ | |
837 | ||
838 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
839 | ||
840 | /* clear then enable interrupts */ | |
841 | ||
842 | #define STD_IRQ (IRQ_LCI | /* Link Change */ \ | |
843 | IRQ_TXI | /* TX done */ \ | |
844 | IRQ_RXI | /* RX done */ \ | |
845 | IRQ_SPIBEI | /* SPI bus error */ \ | |
846 | IRQ_TXPSI | /* TX process stop */ \ | |
847 | IRQ_RXPSI) /* RX process stop */ | |
848 | ||
849 | ks->rc_ier = STD_IRQ; | |
850 | ks8851_wrreg16(ks, KS_ISR, STD_IRQ); | |
851 | ks8851_wrreg16(ks, KS_IER, STD_IRQ); | |
852 | ||
853 | netif_start_queue(ks->netdev); | |
854 | ||
0dc7d2b3 | 855 | netif_dbg(ks, ifup, ks->netdev, "network device up\n"); |
3ba81f3e BD |
856 | |
857 | mutex_unlock(&ks->lock); | |
858 | return 0; | |
859 | } | |
860 | ||
861 | /** | |
862 | * ks8851_net_stop - close network device | |
863 | * @dev: The device being closed. | |
864 | * | |
865 | * Called to close down a network device which has been active. Cancell any | |
866 | * work, shutdown the RX and TX process and then place the chip into a low | |
867 | * power state whilst it is not being used. | |
868 | */ | |
869 | static int ks8851_net_stop(struct net_device *dev) | |
870 | { | |
871 | struct ks8851_net *ks = netdev_priv(dev); | |
872 | ||
0dc7d2b3 | 873 | netif_info(ks, ifdown, dev, "shutting down\n"); |
3ba81f3e BD |
874 | |
875 | netif_stop_queue(dev); | |
876 | ||
877 | mutex_lock(&ks->lock); | |
c5a99937 SB |
878 | /* turn off the IRQs and ack any outstanding */ |
879 | ks8851_wrreg16(ks, KS_IER, 0x0000); | |
880 | ks8851_wrreg16(ks, KS_ISR, 0xffff); | |
881 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
882 | |
883 | /* stop any outstanding work */ | |
3ba81f3e BD |
884 | flush_work(&ks->tx_work); |
885 | flush_work(&ks->rxctrl_work); | |
886 | ||
c5a99937 | 887 | mutex_lock(&ks->lock); |
3ba81f3e BD |
888 | /* shutdown RX process */ |
889 | ks8851_wrreg16(ks, KS_RXCR1, 0x0000); | |
890 | ||
891 | /* shutdown TX process */ | |
892 | ks8851_wrreg16(ks, KS_TXCR, 0x0000); | |
893 | ||
894 | /* set powermode to soft power down to save power */ | |
895 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
c5a99937 | 896 | mutex_unlock(&ks->lock); |
3ba81f3e BD |
897 | |
898 | /* ensure any queued tx buffers are dumped */ | |
899 | while (!skb_queue_empty(&ks->txq)) { | |
900 | struct sk_buff *txb = skb_dequeue(&ks->txq); | |
901 | ||
0dc7d2b3 JP |
902 | netif_dbg(ks, ifdown, ks->netdev, |
903 | "%s: freeing txb %p\n", __func__, txb); | |
3ba81f3e BD |
904 | |
905 | dev_kfree_skb(txb); | |
906 | } | |
907 | ||
3ba81f3e BD |
908 | return 0; |
909 | } | |
910 | ||
911 | /** | |
912 | * ks8851_start_xmit - transmit packet | |
913 | * @skb: The buffer to transmit | |
914 | * @dev: The device used to transmit the packet. | |
915 | * | |
916 | * Called by the network layer to transmit the @skb. Queue the packet for | |
917 | * the device and schedule the necessary work to transmit the packet when | |
918 | * it is free. | |
919 | * | |
920 | * We do this to firstly avoid sleeping with the network device locked, | |
921 | * and secondly so we can round up more than one packet to transmit which | |
922 | * means we can try and avoid generating too many transmit done interrupts. | |
923 | */ | |
61357325 SH |
924 | static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, |
925 | struct net_device *dev) | |
3ba81f3e BD |
926 | { |
927 | struct ks8851_net *ks = netdev_priv(dev); | |
928 | unsigned needed = calc_txlen(skb->len); | |
61357325 | 929 | netdev_tx_t ret = NETDEV_TX_OK; |
3ba81f3e | 930 | |
0dc7d2b3 JP |
931 | netif_dbg(ks, tx_queued, ks->netdev, |
932 | "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); | |
3ba81f3e BD |
933 | |
934 | spin_lock(&ks->statelock); | |
935 | ||
936 | if (needed > ks->tx_space) { | |
937 | netif_stop_queue(dev); | |
938 | ret = NETDEV_TX_BUSY; | |
939 | } else { | |
940 | ks->tx_space -= needed; | |
941 | skb_queue_tail(&ks->txq, skb); | |
942 | } | |
943 | ||
944 | spin_unlock(&ks->statelock); | |
945 | schedule_work(&ks->tx_work); | |
946 | ||
947 | return ret; | |
948 | } | |
949 | ||
950 | /** | |
951 | * ks8851_rxctrl_work - work handler to change rx mode | |
952 | * @work: The work structure this belongs to. | |
953 | * | |
954 | * Lock the device and issue the necessary changes to the receive mode from | |
955 | * the network device layer. This is done so that we can do this without | |
956 | * having to sleep whilst holding the network device lock. | |
957 | * | |
958 | * Since the recommendation from Micrel is that the RXQ is shutdown whilst the | |
959 | * receive parameters are programmed, we issue a write to disable the RXQ and | |
960 | * then wait for the interrupt handler to be triggered once the RXQ shutdown is | |
961 | * complete. The interrupt handler then writes the new values into the chip. | |
962 | */ | |
963 | static void ks8851_rxctrl_work(struct work_struct *work) | |
964 | { | |
965 | struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); | |
966 | ||
967 | mutex_lock(&ks->lock); | |
968 | ||
969 | /* need to shutdown RXQ before modifying filter parameters */ | |
970 | ks8851_wrreg16(ks, KS_RXCR1, 0x00); | |
971 | ||
972 | mutex_unlock(&ks->lock); | |
973 | } | |
974 | ||
975 | static void ks8851_set_rx_mode(struct net_device *dev) | |
976 | { | |
977 | struct ks8851_net *ks = netdev_priv(dev); | |
978 | struct ks8851_rxctrl rxctrl; | |
979 | ||
980 | memset(&rxctrl, 0, sizeof(rxctrl)); | |
981 | ||
982 | if (dev->flags & IFF_PROMISC) { | |
983 | /* interface to receive everything */ | |
984 | ||
985 | rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; | |
986 | } else if (dev->flags & IFF_ALLMULTI) { | |
987 | /* accept all multicast packets */ | |
988 | ||
989 | rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | | |
990 | RXCR1_RXPAFMA | RXCR1_RXMAFMA); | |
4cd24eaf | 991 | } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { |
22bedad3 | 992 | struct netdev_hw_addr *ha; |
3ba81f3e | 993 | u32 crc; |
3ba81f3e BD |
994 | |
995 | /* accept some multicast */ | |
996 | ||
22bedad3 JP |
997 | netdev_for_each_mc_addr(ha, dev) { |
998 | crc = ether_crc(ETH_ALEN, ha->addr); | |
3ba81f3e BD |
999 | crc >>= (32 - 6); /* get top six bits */ |
1000 | ||
1001 | rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); | |
3ba81f3e BD |
1002 | } |
1003 | ||
b6a71bfa | 1004 | rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; |
3ba81f3e BD |
1005 | } else { |
1006 | /* just accept broadcast / unicast */ | |
1007 | rxctrl.rxcr1 = RXCR1_RXPAFMA; | |
1008 | } | |
1009 | ||
1010 | rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ | |
1011 | RXCR1_RXBE | /* broadcast enable */ | |
1012 | RXCR1_RXE | /* RX process enable */ | |
1013 | RXCR1_RXFCE); /* enable flow control */ | |
1014 | ||
1015 | rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; | |
1016 | ||
1017 | /* schedule work to do the actual set of the data if needed */ | |
1018 | ||
1019 | spin_lock(&ks->statelock); | |
1020 | ||
1021 | if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { | |
1022 | memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); | |
1023 | schedule_work(&ks->rxctrl_work); | |
1024 | } | |
1025 | ||
1026 | spin_unlock(&ks->statelock); | |
1027 | } | |
1028 | ||
1029 | static int ks8851_set_mac_address(struct net_device *dev, void *addr) | |
1030 | { | |
1031 | struct sockaddr *sa = addr; | |
1032 | ||
1033 | if (netif_running(dev)) | |
1034 | return -EBUSY; | |
1035 | ||
1036 | if (!is_valid_ether_addr(sa->sa_data)) | |
1037 | return -EADDRNOTAVAIL; | |
1038 | ||
1039 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); | |
1040 | return ks8851_write_mac_addr(dev); | |
1041 | } | |
1042 | ||
1043 | static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) | |
1044 | { | |
1045 | struct ks8851_net *ks = netdev_priv(dev); | |
1046 | ||
1047 | if (!netif_running(dev)) | |
1048 | return -EINVAL; | |
1049 | ||
1050 | return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); | |
1051 | } | |
1052 | ||
1053 | static const struct net_device_ops ks8851_netdev_ops = { | |
1054 | .ndo_open = ks8851_net_open, | |
1055 | .ndo_stop = ks8851_net_stop, | |
1056 | .ndo_do_ioctl = ks8851_net_ioctl, | |
1057 | .ndo_start_xmit = ks8851_start_xmit, | |
1058 | .ndo_set_mac_address = ks8851_set_mac_address, | |
1059 | .ndo_set_rx_mode = ks8851_set_rx_mode, | |
1060 | .ndo_change_mtu = eth_change_mtu, | |
1061 | .ndo_validate_addr = eth_validate_addr, | |
1062 | }; | |
1063 | ||
1064 | /* ethtool support */ | |
1065 | ||
1066 | static void ks8851_get_drvinfo(struct net_device *dev, | |
1067 | struct ethtool_drvinfo *di) | |
1068 | { | |
1069 | strlcpy(di->driver, "KS8851", sizeof(di->driver)); | |
1070 | strlcpy(di->version, "1.00", sizeof(di->version)); | |
1071 | strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); | |
1072 | } | |
1073 | ||
1074 | static u32 ks8851_get_msglevel(struct net_device *dev) | |
1075 | { | |
1076 | struct ks8851_net *ks = netdev_priv(dev); | |
1077 | return ks->msg_enable; | |
1078 | } | |
1079 | ||
1080 | static void ks8851_set_msglevel(struct net_device *dev, u32 to) | |
1081 | { | |
1082 | struct ks8851_net *ks = netdev_priv(dev); | |
1083 | ks->msg_enable = to; | |
1084 | } | |
1085 | ||
1086 | static int ks8851_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1087 | { | |
1088 | struct ks8851_net *ks = netdev_priv(dev); | |
1089 | return mii_ethtool_gset(&ks->mii, cmd); | |
1090 | } | |
1091 | ||
1092 | static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1093 | { | |
1094 | struct ks8851_net *ks = netdev_priv(dev); | |
1095 | return mii_ethtool_sset(&ks->mii, cmd); | |
1096 | } | |
1097 | ||
1098 | static u32 ks8851_get_link(struct net_device *dev) | |
1099 | { | |
1100 | struct ks8851_net *ks = netdev_priv(dev); | |
1101 | return mii_link_ok(&ks->mii); | |
1102 | } | |
1103 | ||
1104 | static int ks8851_nway_reset(struct net_device *dev) | |
1105 | { | |
1106 | struct ks8851_net *ks = netdev_priv(dev); | |
1107 | return mii_nway_restart(&ks->mii); | |
1108 | } | |
1109 | ||
51b7b1c3 | 1110 | /* EEPROM support */ |
a84afa40 | 1111 | |
51b7b1c3 | 1112 | static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee) |
a84afa40 | 1113 | { |
51b7b1c3 BD |
1114 | struct ks8851_net *ks = ee->data; |
1115 | unsigned val; | |
a84afa40 | 1116 | |
51b7b1c3 | 1117 | val = ks8851_rdreg16(ks, KS_EEPCR); |
a84afa40 | 1118 | |
51b7b1c3 BD |
1119 | ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0; |
1120 | ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0; | |
1121 | ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0; | |
1122 | } | |
a84afa40 | 1123 | |
51b7b1c3 BD |
1124 | static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee) |
1125 | { | |
1126 | struct ks8851_net *ks = ee->data; | |
1127 | unsigned val = EEPCR_EESA; /* default - eeprom access on */ | |
1128 | ||
1129 | if (ee->drive_data) | |
1130 | val |= EEPCR_EESRWA; | |
1131 | if (ee->reg_data_in) | |
1132 | val |= EEPCR_EEDO; | |
1133 | if (ee->reg_data_clock) | |
1134 | val |= EEPCR_EESCK; | |
1135 | if (ee->reg_chip_select) | |
1136 | val |= EEPCR_EECS; | |
1137 | ||
1138 | ks8851_wrreg16(ks, KS_EEPCR, val); | |
1139 | } | |
a84afa40 | 1140 | |
51b7b1c3 BD |
1141 | /** |
1142 | * ks8851_eeprom_claim - claim device EEPROM and activate the interface | |
1143 | * @ks: The network device state. | |
1144 | * | |
1145 | * Check for the presence of an EEPROM, and then activate software access | |
1146 | * to the device. | |
1147 | */ | |
1148 | static int ks8851_eeprom_claim(struct ks8851_net *ks) | |
1149 | { | |
1150 | if (!(ks->rc_ccr & CCR_EEPROM)) | |
1151 | return -ENOENT; | |
a84afa40 | 1152 | |
51b7b1c3 | 1153 | mutex_lock(&ks->lock); |
a84afa40 | 1154 | |
51b7b1c3 BD |
1155 | /* start with clock low, cs high */ |
1156 | ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS); | |
1157 | return 0; | |
1158 | } | |
a84afa40 | 1159 | |
51b7b1c3 BD |
1160 | /** |
1161 | * ks8851_eeprom_release - release the EEPROM interface | |
1162 | * @ks: The device state | |
1163 | * | |
1164 | * Release the software access to the device EEPROM | |
1165 | */ | |
1166 | static void ks8851_eeprom_release(struct ks8851_net *ks) | |
1167 | { | |
1168 | unsigned val = ks8851_rdreg16(ks, KS_EEPCR); | |
a84afa40 | 1169 | |
51b7b1c3 BD |
1170 | ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA); |
1171 | mutex_unlock(&ks->lock); | |
a84afa40 SJ |
1172 | } |
1173 | ||
51b7b1c3 BD |
1174 | #define KS_EEPROM_MAGIC (0x00008851) |
1175 | ||
a84afa40 | 1176 | static int ks8851_set_eeprom(struct net_device *dev, |
51b7b1c3 | 1177 | struct ethtool_eeprom *ee, u8 *data) |
a84afa40 SJ |
1178 | { |
1179 | struct ks8851_net *ks = netdev_priv(dev); | |
51b7b1c3 BD |
1180 | int offset = ee->offset; |
1181 | int len = ee->len; | |
1182 | u16 tmp; | |
1183 | ||
1184 | /* currently only support byte writing */ | |
1185 | if (len != 1) | |
a84afa40 SJ |
1186 | return -EINVAL; |
1187 | ||
51b7b1c3 BD |
1188 | if (ee->magic != KS_EEPROM_MAGIC) |
1189 | return -EINVAL; | |
a84afa40 | 1190 | |
51b7b1c3 BD |
1191 | if (ks8851_eeprom_claim(ks)) |
1192 | return -ENOENT; | |
1193 | ||
1194 | eeprom_93cx6_wren(&ks->eeprom, true); | |
1195 | ||
1196 | /* ethtool currently only supports writing bytes, which means | |
1197 | * we have to read/modify/write our 16bit EEPROMs */ | |
a84afa40 | 1198 | |
51b7b1c3 | 1199 | eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp); |
a84afa40 | 1200 | |
51b7b1c3 BD |
1201 | if (offset & 1) { |
1202 | tmp &= 0xff; | |
1203 | tmp |= *data << 8; | |
1204 | } else { | |
1205 | tmp &= 0xff00; | |
1206 | tmp |= *data; | |
a84afa40 | 1207 | } |
a84afa40 | 1208 | |
51b7b1c3 BD |
1209 | eeprom_93cx6_write(&ks->eeprom, offset/2, tmp); |
1210 | eeprom_93cx6_wren(&ks->eeprom, false); | |
1211 | ||
1212 | ks8851_eeprom_release(ks); | |
1213 | ||
1214 | return 0; | |
1215 | } | |
a84afa40 | 1216 | |
51b7b1c3 BD |
1217 | static int ks8851_get_eeprom(struct net_device *dev, |
1218 | struct ethtool_eeprom *ee, u8 *data) | |
1219 | { | |
1220 | struct ks8851_net *ks = netdev_priv(dev); | |
1221 | int offset = ee->offset; | |
1222 | int len = ee->len; | |
a84afa40 | 1223 | |
51b7b1c3 BD |
1224 | /* must be 2 byte aligned */ |
1225 | if (len & 1 || offset & 1) | |
1226 | return -EINVAL; | |
a84afa40 | 1227 | |
51b7b1c3 BD |
1228 | if (ks8851_eeprom_claim(ks)) |
1229 | return -ENOENT; | |
a84afa40 | 1230 | |
51b7b1c3 | 1231 | ee->magic = KS_EEPROM_MAGIC; |
a84afa40 | 1232 | |
51b7b1c3 BD |
1233 | eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2); |
1234 | ks8851_eeprom_release(ks); | |
a84afa40 | 1235 | |
51b7b1c3 BD |
1236 | return 0; |
1237 | } | |
a84afa40 | 1238 | |
51b7b1c3 BD |
1239 | static int ks8851_get_eeprom_len(struct net_device *dev) |
1240 | { | |
1241 | struct ks8851_net *ks = netdev_priv(dev); | |
1242 | ||
1243 | /* currently, we assume it is an 93C46 attached, so return 128 */ | |
1244 | return ks->rc_ccr & CCR_EEPROM ? 128 : 0; | |
a84afa40 SJ |
1245 | } |
1246 | ||
3ba81f3e BD |
1247 | static const struct ethtool_ops ks8851_ethtool_ops = { |
1248 | .get_drvinfo = ks8851_get_drvinfo, | |
1249 | .get_msglevel = ks8851_get_msglevel, | |
1250 | .set_msglevel = ks8851_set_msglevel, | |
1251 | .get_settings = ks8851_get_settings, | |
1252 | .set_settings = ks8851_set_settings, | |
1253 | .get_link = ks8851_get_link, | |
1254 | .nway_reset = ks8851_nway_reset, | |
a84afa40 SJ |
1255 | .get_eeprom_len = ks8851_get_eeprom_len, |
1256 | .get_eeprom = ks8851_get_eeprom, | |
1257 | .set_eeprom = ks8851_set_eeprom, | |
3ba81f3e BD |
1258 | }; |
1259 | ||
1260 | /* MII interface controls */ | |
1261 | ||
1262 | /** | |
1263 | * ks8851_phy_reg - convert MII register into a KS8851 register | |
1264 | * @reg: MII register number. | |
1265 | * | |
1266 | * Return the KS8851 register number for the corresponding MII PHY register | |
1267 | * if possible. Return zero if the MII register has no direct mapping to the | |
1268 | * KS8851 register set. | |
1269 | */ | |
1270 | static int ks8851_phy_reg(int reg) | |
1271 | { | |
1272 | switch (reg) { | |
1273 | case MII_BMCR: | |
1274 | return KS_P1MBCR; | |
1275 | case MII_BMSR: | |
1276 | return KS_P1MBSR; | |
1277 | case MII_PHYSID1: | |
1278 | return KS_PHY1ILR; | |
1279 | case MII_PHYSID2: | |
1280 | return KS_PHY1IHR; | |
1281 | case MII_ADVERTISE: | |
1282 | return KS_P1ANAR; | |
1283 | case MII_LPA: | |
1284 | return KS_P1ANLPR; | |
1285 | } | |
1286 | ||
1287 | return 0x0; | |
1288 | } | |
1289 | ||
1290 | /** | |
1291 | * ks8851_phy_read - MII interface PHY register read. | |
1292 | * @dev: The network device the PHY is on. | |
1293 | * @phy_addr: Address of PHY (ignored as we only have one) | |
1294 | * @reg: The register to read. | |
1295 | * | |
1296 | * This call reads data from the PHY register specified in @reg. Since the | |
25985edc | 1297 | * device does not support all the MII registers, the non-existent values |
3ba81f3e BD |
1298 | * are always returned as zero. |
1299 | * | |
1300 | * We return zero for unsupported registers as the MII code does not check | |
1301 | * the value returned for any error status, and simply returns it to the | |
1302 | * caller. The mii-tool that the driver was tested with takes any -ve error | |
1303 | * as real PHY capabilities, thus displaying incorrect data to the user. | |
1304 | */ | |
1305 | static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) | |
1306 | { | |
1307 | struct ks8851_net *ks = netdev_priv(dev); | |
1308 | int ksreg; | |
1309 | int result; | |
1310 | ||
1311 | ksreg = ks8851_phy_reg(reg); | |
1312 | if (!ksreg) | |
1313 | return 0x0; /* no error return allowed, so use zero */ | |
1314 | ||
1315 | mutex_lock(&ks->lock); | |
1316 | result = ks8851_rdreg16(ks, ksreg); | |
1317 | mutex_unlock(&ks->lock); | |
1318 | ||
1319 | return result; | |
1320 | } | |
1321 | ||
1322 | static void ks8851_phy_write(struct net_device *dev, | |
1323 | int phy, int reg, int value) | |
1324 | { | |
1325 | struct ks8851_net *ks = netdev_priv(dev); | |
1326 | int ksreg; | |
1327 | ||
1328 | ksreg = ks8851_phy_reg(reg); | |
1329 | if (ksreg) { | |
1330 | mutex_lock(&ks->lock); | |
1331 | ks8851_wrreg16(ks, ksreg, value); | |
1332 | mutex_unlock(&ks->lock); | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | /** | |
1337 | * ks8851_read_selftest - read the selftest memory info. | |
1338 | * @ks: The device state | |
1339 | * | |
1340 | * Read and check the TX/RX memory selftest information. | |
1341 | */ | |
1342 | static int ks8851_read_selftest(struct ks8851_net *ks) | |
1343 | { | |
1344 | unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; | |
1345 | int ret = 0; | |
1346 | unsigned rd; | |
1347 | ||
1348 | rd = ks8851_rdreg16(ks, KS_MBIR); | |
1349 | ||
1350 | if ((rd & both_done) != both_done) { | |
0dc7d2b3 | 1351 | netdev_warn(ks->netdev, "Memory selftest not finished\n"); |
3ba81f3e BD |
1352 | return 0; |
1353 | } | |
1354 | ||
1355 | if (rd & MBIR_TXMBFA) { | |
0dc7d2b3 | 1356 | netdev_err(ks->netdev, "TX memory selftest fail\n"); |
3ba81f3e BD |
1357 | ret |= 1; |
1358 | } | |
1359 | ||
1360 | if (rd & MBIR_RXMBFA) { | |
0dc7d2b3 | 1361 | netdev_err(ks->netdev, "RX memory selftest fail\n"); |
3ba81f3e BD |
1362 | ret |= 2; |
1363 | } | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | /* driver bus management functions */ | |
1369 | ||
d5b40921 LPC |
1370 | #ifdef CONFIG_PM_SLEEP |
1371 | ||
1372 | static int ks8851_suspend(struct device *dev) | |
1d5439b9 | 1373 | { |
d5b40921 LPC |
1374 | struct ks8851_net *ks = dev_get_drvdata(dev); |
1375 | struct net_device *netdev = ks->netdev; | |
1d5439b9 | 1376 | |
d5b40921 LPC |
1377 | if (netif_running(netdev)) { |
1378 | netif_device_detach(netdev); | |
1379 | ks8851_net_stop(netdev); | |
1d5439b9 AA |
1380 | } |
1381 | ||
1382 | return 0; | |
1383 | } | |
1384 | ||
d5b40921 | 1385 | static int ks8851_resume(struct device *dev) |
1d5439b9 | 1386 | { |
d5b40921 LPC |
1387 | struct ks8851_net *ks = dev_get_drvdata(dev); |
1388 | struct net_device *netdev = ks->netdev; | |
1d5439b9 | 1389 | |
d5b40921 LPC |
1390 | if (netif_running(netdev)) { |
1391 | ks8851_net_open(netdev); | |
1392 | netif_device_attach(netdev); | |
1d5439b9 AA |
1393 | } |
1394 | ||
1395 | return 0; | |
1396 | } | |
8ac2b3c0 | 1397 | #endif |
d5b40921 LPC |
1398 | |
1399 | static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume); | |
1d5439b9 | 1400 | |
654b8c5c | 1401 | static int ks8851_probe(struct spi_device *spi) |
3ba81f3e BD |
1402 | { |
1403 | struct net_device *ndev; | |
1404 | struct ks8851_net *ks; | |
1405 | int ret; | |
51c61a28 | 1406 | unsigned cider; |
3ba81f3e BD |
1407 | |
1408 | ndev = alloc_etherdev(sizeof(struct ks8851_net)); | |
41de8d4c | 1409 | if (!ndev) |
3ba81f3e | 1410 | return -ENOMEM; |
3ba81f3e BD |
1411 | |
1412 | spi->bits_per_word = 8; | |
1413 | ||
1414 | ks = netdev_priv(ndev); | |
1415 | ||
1416 | ks->netdev = ndev; | |
1417 | ks->spidev = spi; | |
1418 | ks->tx_space = 6144; | |
1419 | ||
ebf4ad95 NM |
1420 | ks->vdd_reg = regulator_get_optional(&spi->dev, "vdd"); |
1421 | if (IS_ERR(ks->vdd_reg)) { | |
1422 | ret = PTR_ERR(ks->vdd_reg); | |
1423 | if (ret == -EPROBE_DEFER) | |
1424 | goto err_reg; | |
1425 | } else { | |
1426 | ret = regulator_enable(ks->vdd_reg); | |
1427 | if (ret) { | |
1428 | dev_err(&spi->dev, "regulator enable fail: %d\n", | |
1429 | ret); | |
1430 | goto err_reg_en; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | ||
3ba81f3e BD |
1435 | mutex_init(&ks->lock); |
1436 | spin_lock_init(&ks->statelock); | |
1437 | ||
1438 | INIT_WORK(&ks->tx_work, ks8851_tx_work); | |
3ba81f3e BD |
1439 | INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); |
1440 | ||
1441 | /* initialise pre-made spi transfer messages */ | |
1442 | ||
1443 | spi_message_init(&ks->spi_msg1); | |
1444 | spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); | |
1445 | ||
1446 | spi_message_init(&ks->spi_msg2); | |
1447 | spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); | |
1448 | spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); | |
1449 | ||
51b7b1c3 BD |
1450 | /* setup EEPROM state */ |
1451 | ||
1452 | ks->eeprom.data = ks; | |
1453 | ks->eeprom.width = PCI_EEPROM_WIDTH_93C46; | |
1454 | ks->eeprom.register_read = ks8851_eeprom_regread; | |
1455 | ks->eeprom.register_write = ks8851_eeprom_regwrite; | |
1456 | ||
3ba81f3e BD |
1457 | /* setup mii state */ |
1458 | ks->mii.dev = ndev; | |
1459 | ks->mii.phy_id = 1, | |
1460 | ks->mii.phy_id_mask = 1; | |
1461 | ks->mii.reg_num_mask = 0xf; | |
1462 | ks->mii.mdio_read = ks8851_phy_read; | |
1463 | ks->mii.mdio_write = ks8851_phy_write; | |
1464 | ||
1465 | dev_info(&spi->dev, "message enable is %d\n", msg_enable); | |
1466 | ||
1467 | /* set the default message enable */ | |
1468 | ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | | |
1469 | NETIF_MSG_PROBE | | |
1470 | NETIF_MSG_LINK)); | |
1471 | ||
1472 | skb_queue_head_init(&ks->txq); | |
1473 | ||
7ad24ea4 | 1474 | ndev->ethtool_ops = &ks8851_ethtool_ops; |
3ba81f3e BD |
1475 | SET_NETDEV_DEV(ndev, &spi->dev); |
1476 | ||
8f996607 | 1477 | spi_set_drvdata(spi, ks); |
3ba81f3e BD |
1478 | |
1479 | ndev->if_port = IF_PORT_100BASET; | |
1480 | ndev->netdev_ops = &ks8851_netdev_ops; | |
1481 | ndev->irq = spi->irq; | |
1482 | ||
57dada68 BD |
1483 | /* issue a global soft reset to reset the device. */ |
1484 | ks8851_soft_reset(ks, GRR_GSR); | |
1485 | ||
3ba81f3e | 1486 | /* simple check for a valid chip being connected to the bus */ |
51c61a28 MR |
1487 | cider = ks8851_rdreg16(ks, KS_CIDER); |
1488 | if ((cider & ~CIDER_REV_MASK) != CIDER_ID) { | |
3ba81f3e BD |
1489 | dev_err(&spi->dev, "failed to read device ID\n"); |
1490 | ret = -ENODEV; | |
1491 | goto err_id; | |
1492 | } | |
1493 | ||
7d997466 SJ |
1494 | /* cache the contents of the CCR register for EEPROM, etc. */ |
1495 | ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); | |
1496 | ||
1497 | if (ks->rc_ccr & CCR_EEPROM) | |
1498 | ks->eeprom_size = 128; | |
1499 | else | |
1500 | ks->eeprom_size = 0; | |
1501 | ||
3ba81f3e BD |
1502 | ks8851_read_selftest(ks); |
1503 | ks8851_init_mac(ks); | |
1504 | ||
656a05c8 FB |
1505 | ret = request_threaded_irq(spi->irq, NULL, ks8851_irq, |
1506 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1507 | ndev->name, ks); | |
3ba81f3e BD |
1508 | if (ret < 0) { |
1509 | dev_err(&spi->dev, "failed to get irq\n"); | |
1510 | goto err_irq; | |
1511 | } | |
1512 | ||
1513 | ret = register_netdev(ndev); | |
1514 | if (ret) { | |
1515 | dev_err(&spi->dev, "failed to register network device\n"); | |
1516 | goto err_netdev; | |
1517 | } | |
1518 | ||
a9a8de21 | 1519 | netdev_info(ndev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n", |
51c61a28 | 1520 | CIDER_REV_GET(cider), ndev->dev_addr, ndev->irq, |
a9a8de21 | 1521 | ks->rc_ccr & CCR_EEPROM ? "has" : "no"); |
3ba81f3e BD |
1522 | |
1523 | return 0; | |
1524 | ||
1525 | ||
1526 | err_netdev: | |
e8195b24 | 1527 | free_irq(ndev->irq, ks); |
3ba81f3e | 1528 | |
3ba81f3e | 1529 | err_irq: |
ebf4ad95 NM |
1530 | err_id: |
1531 | if (!IS_ERR(ks->vdd_reg)) | |
1532 | regulator_disable(ks->vdd_reg); | |
1533 | err_reg_en: | |
1534 | if (!IS_ERR(ks->vdd_reg)) | |
1535 | regulator_put(ks->vdd_reg); | |
1536 | err_reg: | |
3ba81f3e BD |
1537 | free_netdev(ndev); |
1538 | return ret; | |
1539 | } | |
1540 | ||
654b8c5c | 1541 | static int ks8851_remove(struct spi_device *spi) |
3ba81f3e | 1542 | { |
8f996607 | 1543 | struct ks8851_net *priv = spi_get_drvdata(spi); |
3ba81f3e BD |
1544 | |
1545 | if (netif_msg_drv(priv)) | |
0dc7d2b3 | 1546 | dev_info(&spi->dev, "remove\n"); |
3ba81f3e BD |
1547 | |
1548 | unregister_netdev(priv->netdev); | |
1549 | free_irq(spi->irq, priv); | |
ebf4ad95 NM |
1550 | if (!IS_ERR(priv->vdd_reg)) { |
1551 | regulator_disable(priv->vdd_reg); | |
1552 | regulator_put(priv->vdd_reg); | |
1553 | } | |
3ba81f3e BD |
1554 | free_netdev(priv->netdev); |
1555 | ||
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | static struct spi_driver ks8851_driver = { | |
1560 | .driver = { | |
1561 | .name = "ks8851", | |
1562 | .owner = THIS_MODULE, | |
8ac2b3c0 | 1563 | .pm = &ks8851_pm_ops, |
3ba81f3e BD |
1564 | }, |
1565 | .probe = ks8851_probe, | |
654b8c5c | 1566 | .remove = ks8851_remove, |
3ba81f3e | 1567 | }; |
0582ce92 | 1568 | module_spi_driver(ks8851_driver); |
3ba81f3e BD |
1569 | |
1570 | MODULE_DESCRIPTION("KS8851 Network driver"); | |
1571 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
1572 | MODULE_LICENSE("GPL"); | |
1573 | ||
1574 | module_param_named(message, msg_enable, int, 0); | |
1575 | MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); | |
e0626e38 | 1576 | MODULE_ALIAS("spi:ks8851"); |