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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> | |
73fdeb82 SB |
29 | #include <linux/gpio.h> |
30 | #include <linux/of_gpio.h> | |
3ba81f3e BD |
31 | |
32 | #include "ks8851.h" | |
33 | ||
34 | /** | |
35 | * struct ks8851_rxctrl - KS8851 driver rx control | |
36 | * @mchash: Multicast hash-table data. | |
37 | * @rxcr1: KS_RXCR1 register setting | |
38 | * @rxcr2: KS_RXCR2 register setting | |
39 | * | |
40 | * Representation of the settings needs to control the receive filtering | |
41 | * such as the multicast hash-filter and the receive register settings. This | |
42 | * is used to make the job of working out if the receive settings change and | |
43 | * then issuing the new settings to the worker that will send the necessary | |
44 | * commands. | |
45 | */ | |
46 | struct ks8851_rxctrl { | |
47 | u16 mchash[4]; | |
48 | u16 rxcr1; | |
49 | u16 rxcr2; | |
50 | }; | |
51 | ||
52 | /** | |
53 | * union ks8851_tx_hdr - tx header data | |
54 | * @txb: The header as bytes | |
55 | * @txw: The header as 16bit, little-endian words | |
56 | * | |
57 | * A dual representation of the tx header data to allow | |
58 | * access to individual bytes, and to allow 16bit accesses | |
59 | * with 16bit alignment. | |
60 | */ | |
61 | union ks8851_tx_hdr { | |
62 | u8 txb[6]; | |
63 | __le16 txw[3]; | |
64 | }; | |
65 | ||
66 | /** | |
67 | * struct ks8851_net - KS8851 driver private data | |
68 | * @netdev: The network device we're bound to | |
69 | * @spidev: The spi device we're bound to. | |
70 | * @lock: Lock to ensure that the device is not accessed when busy. | |
71 | * @statelock: Lock on this structure for tx list. | |
72 | * @mii: The MII state information for the mii calls. | |
73 | * @rxctrl: RX settings for @rxctrl_work. | |
74 | * @tx_work: Work queue for tx packets | |
3ba81f3e BD |
75 | * @rxctrl_work: Work queue for updating RX mode and multicast lists |
76 | * @txq: Queue of packets for transmission. | |
77 | * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. | |
78 | * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. | |
79 | * @txh: Space for generating packet TX header in DMA-able data | |
80 | * @rxd: Space for receiving SPI data, in DMA-able space. | |
81 | * @txd: Space for transmitting SPI data, in DMA-able space. | |
82 | * @msg_enable: The message flags controlling driver output (see ethtool). | |
83 | * @fid: Incrementing frame id tag. | |
84 | * @rc_ier: Cached copy of KS_IER. | |
7d997466 | 85 | * @rc_ccr: Cached copy of KS_CCR. |
3ba81f3e | 86 | * @rc_rxqcr: Cached copy of KS_RXQCR. |
7d997466 | 87 | * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom |
51b7b1c3 | 88 | * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. |
ebf4ad95 | 89 | * @vdd_reg: Optional regulator supplying the chip |
73fdeb82 SB |
90 | * @vdd_io: Optional digital power supply for IO |
91 | * @gpio: Optional reset_n gpio | |
3ba81f3e BD |
92 | * |
93 | * The @lock ensures that the chip is protected when certain operations are | |
94 | * in progress. When the read or write packet transfer is in progress, most | |
95 | * of the chip registers are not ccessible until the transfer is finished and | |
96 | * the DMA has been de-asserted. | |
97 | * | |
98 | * The @statelock is used to protect information in the structure which may | |
99 | * need to be accessed via several sources, such as the network driver layer | |
100 | * or one of the work queues. | |
101 | * | |
102 | * We align the buffers we may use for rx/tx to ensure that if the SPI driver | |
103 | * wants to DMA map them, it will not have any problems with data the driver | |
104 | * modifies. | |
105 | */ | |
106 | struct ks8851_net { | |
107 | struct net_device *netdev; | |
108 | struct spi_device *spidev; | |
109 | struct mutex lock; | |
110 | spinlock_t statelock; | |
111 | ||
112 | union ks8851_tx_hdr txh ____cacheline_aligned; | |
113 | u8 rxd[8]; | |
114 | u8 txd[8]; | |
115 | ||
116 | u32 msg_enable ____cacheline_aligned; | |
117 | u16 tx_space; | |
118 | u8 fid; | |
119 | ||
120 | u16 rc_ier; | |
121 | u16 rc_rxqcr; | |
7d997466 SJ |
122 | u16 rc_ccr; |
123 | u16 eeprom_size; | |
3ba81f3e BD |
124 | |
125 | struct mii_if_info mii; | |
126 | struct ks8851_rxctrl rxctrl; | |
127 | ||
128 | struct work_struct tx_work; | |
3ba81f3e BD |
129 | struct work_struct rxctrl_work; |
130 | ||
131 | struct sk_buff_head txq; | |
132 | ||
133 | struct spi_message spi_msg1; | |
134 | struct spi_message spi_msg2; | |
135 | struct spi_transfer spi_xfer1; | |
136 | struct spi_transfer spi_xfer2[2]; | |
51b7b1c3 BD |
137 | |
138 | struct eeprom_93cx6 eeprom; | |
ebf4ad95 | 139 | struct regulator *vdd_reg; |
73fdeb82 SB |
140 | struct regulator *vdd_io; |
141 | int gpio; | |
3ba81f3e BD |
142 | }; |
143 | ||
144 | static int msg_enable; | |
145 | ||
3ba81f3e BD |
146 | /* shift for byte-enable data */ |
147 | #define BYTE_EN(_x) ((_x) << 2) | |
148 | ||
149 | /* turn register number and byte-enable mask into data for start of packet */ | |
150 | #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) | |
151 | ||
152 | /* SPI register read/write calls. | |
153 | * | |
154 | * All these calls issue SPI transactions to access the chip's registers. They | |
155 | * all require that the necessary lock is held to prevent accesses when the | |
25985edc | 156 | * chip is busy transferring packet data (RX/TX FIFO accesses). |
3ba81f3e BD |
157 | */ |
158 | ||
159 | /** | |
160 | * ks8851_wrreg16 - write 16bit register value to chip | |
161 | * @ks: The chip state | |
162 | * @reg: The register address | |
163 | * @val: The value to write | |
164 | * | |
165 | * Issue a write to put the value @val into the register specified in @reg. | |
166 | */ | |
167 | static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) | |
168 | { | |
169 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
170 | struct spi_message *msg = &ks->spi_msg1; | |
171 | __le16 txb[2]; | |
172 | int ret; | |
173 | ||
174 | txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); | |
175 | txb[1] = cpu_to_le16(val); | |
176 | ||
177 | xfer->tx_buf = txb; | |
178 | xfer->rx_buf = NULL; | |
179 | xfer->len = 4; | |
180 | ||
181 | ret = spi_sync(ks->spidev, msg); | |
182 | if (ret < 0) | |
0dc7d2b3 | 183 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
3ba81f3e BD |
184 | } |
185 | ||
160d0fad BD |
186 | /** |
187 | * ks8851_wrreg8 - write 8bit register value to chip | |
188 | * @ks: The chip state | |
189 | * @reg: The register address | |
190 | * @val: The value to write | |
191 | * | |
192 | * Issue a write to put the value @val into the register specified in @reg. | |
193 | */ | |
194 | static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) | |
195 | { | |
196 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
197 | struct spi_message *msg = &ks->spi_msg1; | |
198 | __le16 txb[2]; | |
199 | int ret; | |
200 | int bit; | |
201 | ||
202 | bit = 1 << (reg & 3); | |
203 | ||
204 | txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); | |
205 | txb[1] = val; | |
206 | ||
207 | xfer->tx_buf = txb; | |
208 | xfer->rx_buf = NULL; | |
209 | xfer->len = 3; | |
210 | ||
211 | ret = spi_sync(ks->spidev, msg); | |
212 | if (ret < 0) | |
0dc7d2b3 | 213 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
160d0fad BD |
214 | } |
215 | ||
3ba81f3e BD |
216 | /** |
217 | * ks8851_rx_1msg - select whether to use one or two messages for spi read | |
218 | * @ks: The device structure | |
219 | * | |
220 | * Return whether to generate a single message with a tx and rx buffer | |
221 | * supplied to spi_sync(), or alternatively send the tx and rx buffers | |
222 | * as separate messages. | |
223 | * | |
224 | * Depending on the hardware in use, a single message may be more efficient | |
225 | * on interrupts or work done by the driver. | |
226 | * | |
227 | * This currently always returns true until we add some per-device data passed | |
228 | * from the platform code to specify which mode is better. | |
229 | */ | |
230 | static inline bool ks8851_rx_1msg(struct ks8851_net *ks) | |
231 | { | |
232 | return true; | |
233 | } | |
234 | ||
235 | /** | |
236 | * ks8851_rdreg - issue read register command and return the data | |
237 | * @ks: The device state | |
238 | * @op: The register address and byte enables in message format. | |
239 | * @rxb: The RX buffer to return the result into | |
240 | * @rxl: The length of data expected. | |
241 | * | |
242 | * This is the low level read call that issues the necessary spi message(s) | |
243 | * to read data from the register specified in @op. | |
244 | */ | |
245 | static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, | |
246 | u8 *rxb, unsigned rxl) | |
247 | { | |
248 | struct spi_transfer *xfer; | |
249 | struct spi_message *msg; | |
250 | __le16 *txb = (__le16 *)ks->txd; | |
251 | u8 *trx = ks->rxd; | |
252 | int ret; | |
253 | ||
254 | txb[0] = cpu_to_le16(op | KS_SPIOP_RD); | |
255 | ||
256 | if (ks8851_rx_1msg(ks)) { | |
257 | msg = &ks->spi_msg1; | |
258 | xfer = &ks->spi_xfer1; | |
259 | ||
260 | xfer->tx_buf = txb; | |
261 | xfer->rx_buf = trx; | |
262 | xfer->len = rxl + 2; | |
263 | } else { | |
264 | msg = &ks->spi_msg2; | |
265 | xfer = ks->spi_xfer2; | |
266 | ||
267 | xfer->tx_buf = txb; | |
268 | xfer->rx_buf = NULL; | |
269 | xfer->len = 2; | |
270 | ||
271 | xfer++; | |
272 | xfer->tx_buf = NULL; | |
273 | xfer->rx_buf = trx; | |
274 | xfer->len = rxl; | |
275 | } | |
276 | ||
277 | ret = spi_sync(ks->spidev, msg); | |
278 | if (ret < 0) | |
0dc7d2b3 | 279 | netdev_err(ks->netdev, "read: spi_sync() failed\n"); |
3ba81f3e BD |
280 | else if (ks8851_rx_1msg(ks)) |
281 | memcpy(rxb, trx + 2, rxl); | |
282 | else | |
283 | memcpy(rxb, trx, rxl); | |
284 | } | |
285 | ||
286 | /** | |
287 | * ks8851_rdreg8 - read 8 bit register from device | |
288 | * @ks: The chip information | |
289 | * @reg: The register address | |
290 | * | |
291 | * Read a 8bit register from the chip, returning the result | |
292 | */ | |
293 | static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) | |
294 | { | |
295 | u8 rxb[1]; | |
296 | ||
297 | ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); | |
298 | return rxb[0]; | |
299 | } | |
300 | ||
301 | /** | |
302 | * ks8851_rdreg16 - read 16 bit register from device | |
303 | * @ks: The chip information | |
304 | * @reg: The register address | |
305 | * | |
306 | * Read a 16bit register from the chip, returning the result | |
307 | */ | |
308 | static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) | |
309 | { | |
310 | __le16 rx = 0; | |
311 | ||
312 | ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); | |
313 | return le16_to_cpu(rx); | |
314 | } | |
315 | ||
316 | /** | |
317 | * ks8851_rdreg32 - read 32 bit register from device | |
318 | * @ks: The chip information | |
319 | * @reg: The register address | |
320 | * | |
321 | * Read a 32bit register from the chip. | |
322 | * | |
323 | * Note, this read requires the address be aligned to 4 bytes. | |
324 | */ | |
325 | static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) | |
326 | { | |
327 | __le32 rx = 0; | |
328 | ||
329 | WARN_ON(reg & 3); | |
330 | ||
331 | ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); | |
332 | return le32_to_cpu(rx); | |
333 | } | |
334 | ||
335 | /** | |
336 | * ks8851_soft_reset - issue one of the soft reset to the device | |
337 | * @ks: The device state. | |
338 | * @op: The bit(s) to set in the GRR | |
339 | * | |
340 | * Issue the relevant soft-reset command to the device's GRR register | |
341 | * specified by @op. | |
342 | * | |
343 | * Note, the delays are in there as a caution to ensure that the reset | |
344 | * has time to take effect and then complete. Since the datasheet does | |
345 | * not currently specify the exact sequence, we have chosen something | |
346 | * that seems to work with our device. | |
347 | */ | |
348 | static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) | |
349 | { | |
350 | ks8851_wrreg16(ks, KS_GRR, op); | |
351 | mdelay(1); /* wait a short time to effect reset */ | |
352 | ks8851_wrreg16(ks, KS_GRR, 0); | |
353 | mdelay(1); /* wait for condition to clear */ | |
354 | } | |
355 | ||
32f160d9 TH |
356 | /** |
357 | * ks8851_set_powermode - set power mode of the device | |
358 | * @ks: The device state | |
359 | * @pwrmode: The power mode value to write to KS_PMECR. | |
360 | * | |
361 | * Change the power mode of the chip. | |
362 | */ | |
363 | static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) | |
364 | { | |
365 | unsigned pmecr; | |
366 | ||
367 | netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); | |
368 | ||
369 | pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
370 | pmecr &= ~PMECR_PM_MASK; | |
371 | pmecr |= pwrmode; | |
372 | ||
373 | ks8851_wrreg16(ks, KS_PMECR, pmecr); | |
374 | } | |
375 | ||
3ba81f3e BD |
376 | /** |
377 | * ks8851_write_mac_addr - write mac address to device registers | |
378 | * @dev: The network device | |
379 | * | |
380 | * Update the KS8851 MAC address registers from the address in @dev. | |
381 | * | |
382 | * This call assumes that the chip is not running, so there is no need to | |
383 | * shutdown the RXQ process whilst setting this. | |
384 | */ | |
385 | static int ks8851_write_mac_addr(struct net_device *dev) | |
386 | { | |
387 | struct ks8851_net *ks = netdev_priv(dev); | |
160d0fad | 388 | int i; |
3ba81f3e BD |
389 | |
390 | mutex_lock(&ks->lock); | |
391 | ||
32f160d9 TH |
392 | /* |
393 | * Wake up chip in case it was powered off when stopped; otherwise, | |
394 | * the first write to the MAC address does not take effect. | |
395 | */ | |
396 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
160d0fad BD |
397 | for (i = 0; i < ETH_ALEN; i++) |
398 | ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); | |
32f160d9 TH |
399 | if (!netif_running(dev)) |
400 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
3ba81f3e BD |
401 | |
402 | mutex_unlock(&ks->lock); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
a9a8de21 BD |
407 | /** |
408 | * ks8851_read_mac_addr - read mac address from device registers | |
409 | * @dev: The network device | |
410 | * | |
411 | * Update our copy of the KS8851 MAC address from the registers of @dev. | |
412 | */ | |
413 | static void ks8851_read_mac_addr(struct net_device *dev) | |
414 | { | |
415 | struct ks8851_net *ks = netdev_priv(dev); | |
416 | int i; | |
417 | ||
418 | mutex_lock(&ks->lock); | |
419 | ||
420 | for (i = 0; i < ETH_ALEN; i++) | |
421 | dev->dev_addr[i] = ks8851_rdreg8(ks, KS_MAR(i)); | |
422 | ||
423 | mutex_unlock(&ks->lock); | |
424 | } | |
425 | ||
3ba81f3e BD |
426 | /** |
427 | * ks8851_init_mac - initialise the mac address | |
428 | * @ks: The device structure | |
429 | * | |
430 | * Get or create the initial mac address for the device and then set that | |
a9a8de21 | 431 | * into the station address register. If there is an EEPROM present, then |
7efd26d0 | 432 | * we try that. If no valid mac address is found we use eth_random_addr() |
3ba81f3e | 433 | * to create a new one. |
3ba81f3e BD |
434 | */ |
435 | static void ks8851_init_mac(struct ks8851_net *ks) | |
436 | { | |
437 | struct net_device *dev = ks->netdev; | |
438 | ||
a9a8de21 BD |
439 | /* first, try reading what we've got already */ |
440 | if (ks->rc_ccr & CCR_EEPROM) { | |
441 | ks8851_read_mac_addr(dev); | |
442 | if (is_valid_ether_addr(dev->dev_addr)) | |
443 | return; | |
444 | ||
445 | netdev_err(ks->netdev, "invalid mac address read %pM\n", | |
446 | dev->dev_addr); | |
447 | } | |
448 | ||
7ce5d222 | 449 | eth_hw_addr_random(dev); |
3ba81f3e BD |
450 | ks8851_write_mac_addr(dev); |
451 | } | |
452 | ||
3ba81f3e BD |
453 | /** |
454 | * ks8851_rdfifo - read data from the receive fifo | |
455 | * @ks: The device state. | |
456 | * @buff: The buffer address | |
457 | * @len: The length of the data to read | |
458 | * | |
9ddc5b6f | 459 | * Issue an RXQ FIFO read command and read the @len amount of data from |
3ba81f3e BD |
460 | * the FIFO into the buffer specified by @buff. |
461 | */ | |
462 | static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) | |
463 | { | |
464 | struct spi_transfer *xfer = ks->spi_xfer2; | |
465 | struct spi_message *msg = &ks->spi_msg2; | |
466 | u8 txb[1]; | |
467 | int ret; | |
468 | ||
0dc7d2b3 JP |
469 | netif_dbg(ks, rx_status, ks->netdev, |
470 | "%s: %d@%p\n", __func__, len, buff); | |
3ba81f3e BD |
471 | |
472 | /* set the operation we're issuing */ | |
473 | txb[0] = KS_SPIOP_RXFIFO; | |
474 | ||
475 | xfer->tx_buf = txb; | |
476 | xfer->rx_buf = NULL; | |
477 | xfer->len = 1; | |
478 | ||
479 | xfer++; | |
480 | xfer->rx_buf = buff; | |
481 | xfer->tx_buf = NULL; | |
482 | xfer->len = len; | |
483 | ||
484 | ret = spi_sync(ks->spidev, msg); | |
485 | if (ret < 0) | |
0dc7d2b3 | 486 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
487 | } |
488 | ||
489 | /** | |
490 | * ks8851_dbg_dumpkkt - dump initial packet contents to debug | |
491 | * @ks: The device state | |
492 | * @rxpkt: The data for the received packet | |
493 | * | |
494 | * Dump the initial data from the packet to dev_dbg(). | |
495 | */ | |
496 | static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) | |
497 | { | |
0dc7d2b3 JP |
498 | netdev_dbg(ks->netdev, |
499 | "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", | |
500 | rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], | |
501 | rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], | |
502 | rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); | |
3ba81f3e BD |
503 | } |
504 | ||
505 | /** | |
506 | * ks8851_rx_pkts - receive packets from the host | |
507 | * @ks: The device information. | |
508 | * | |
509 | * This is called from the IRQ work queue when the system detects that there | |
510 | * are packets in the receive queue. Find out how many packets there are and | |
511 | * read them from the FIFO. | |
512 | */ | |
513 | static void ks8851_rx_pkts(struct ks8851_net *ks) | |
514 | { | |
515 | struct sk_buff *skb; | |
516 | unsigned rxfc; | |
517 | unsigned rxlen; | |
518 | unsigned rxstat; | |
519 | u32 rxh; | |
520 | u8 *rxpkt; | |
521 | ||
522 | rxfc = ks8851_rdreg8(ks, KS_RXFC); | |
523 | ||
0dc7d2b3 JP |
524 | netif_dbg(ks, rx_status, ks->netdev, |
525 | "%s: %d packets\n", __func__, rxfc); | |
3ba81f3e BD |
526 | |
527 | /* Currently we're issuing a read per packet, but we could possibly | |
528 | * improve the code by issuing a single read, getting the receive | |
529 | * header, allocating the packet and then reading the packet data | |
530 | * out in one go. | |
531 | * | |
532 | * This form of operation would require us to hold the SPI bus' | |
533 | * chipselect low during the entie transaction to avoid any | |
25985edc | 534 | * reset to the data stream coming from the chip. |
3ba81f3e BD |
535 | */ |
536 | ||
537 | for (; rxfc != 0; rxfc--) { | |
538 | rxh = ks8851_rdreg32(ks, KS_RXFHSR); | |
539 | rxstat = rxh & 0xffff; | |
14bc435e | 540 | rxlen = (rxh >> 16) & 0xfff; |
3ba81f3e | 541 | |
0dc7d2b3 JP |
542 | netif_dbg(ks, rx_status, ks->netdev, |
543 | "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); | |
3ba81f3e BD |
544 | |
545 | /* the length of the packet includes the 32bit CRC */ | |
546 | ||
547 | /* set dma read address */ | |
548 | ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); | |
549 | ||
550 | /* start the packet dma process, and set auto-dequeue rx */ | |
551 | ks8851_wrreg16(ks, KS_RXQCR, | |
552 | ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); | |
553 | ||
972c40b5 ED |
554 | if (rxlen > 4) { |
555 | unsigned int rxalign; | |
556 | ||
557 | rxlen -= 4; | |
558 | rxalign = ALIGN(rxlen, 4); | |
559 | skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); | |
560 | if (skb) { | |
3ba81f3e | 561 | |
972c40b5 ED |
562 | /* 4 bytes of status header + 4 bytes of |
563 | * garbage: we put them before ethernet | |
564 | * header, so that they are copied, | |
565 | * but ignored. | |
566 | */ | |
3ba81f3e | 567 | |
972c40b5 | 568 | rxpkt = skb_put(skb, rxlen) - 8; |
3ba81f3e | 569 | |
972c40b5 | 570 | ks8851_rdfifo(ks, rxpkt, rxalign + 8); |
3ba81f3e | 571 | |
972c40b5 ED |
572 | if (netif_msg_pktdata(ks)) |
573 | ks8851_dbg_dumpkkt(ks, rxpkt); | |
3ba81f3e | 574 | |
972c40b5 | 575 | skb->protocol = eth_type_trans(skb, ks->netdev); |
fbcf88b8 | 576 | netif_rx_ni(skb); |
3ba81f3e | 577 | |
972c40b5 ED |
578 | ks->netdev->stats.rx_packets++; |
579 | ks->netdev->stats.rx_bytes += rxlen; | |
580 | } | |
3ba81f3e BD |
581 | } |
582 | ||
583 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
584 | } | |
585 | } | |
586 | ||
587 | /** | |
656a05c8 FB |
588 | * ks8851_irq - IRQ handler for dealing with interrupt requests |
589 | * @irq: IRQ number | |
590 | * @_ks: cookie | |
3ba81f3e | 591 | * |
656a05c8 FB |
592 | * This handler is invoked when the IRQ line asserts to find out what happened. |
593 | * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs | |
594 | * in thread context. | |
3ba81f3e BD |
595 | * |
596 | * Read the interrupt status, work out what needs to be done and then clear | |
597 | * any of the interrupts that are not needed. | |
598 | */ | |
656a05c8 | 599 | static irqreturn_t ks8851_irq(int irq, void *_ks) |
3ba81f3e | 600 | { |
656a05c8 | 601 | struct ks8851_net *ks = _ks; |
3ba81f3e BD |
602 | unsigned status; |
603 | unsigned handled = 0; | |
604 | ||
605 | mutex_lock(&ks->lock); | |
606 | ||
607 | status = ks8851_rdreg16(ks, KS_ISR); | |
608 | ||
0dc7d2b3 JP |
609 | netif_dbg(ks, intr, ks->netdev, |
610 | "%s: status 0x%04x\n", __func__, status); | |
3ba81f3e | 611 | |
062e55e3 | 612 | if (status & IRQ_LCI) |
3ba81f3e | 613 | handled |= IRQ_LCI; |
3ba81f3e BD |
614 | |
615 | if (status & IRQ_LDI) { | |
616 | u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
617 | pmecr &= ~PMECR_WKEVT_MASK; | |
618 | ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); | |
619 | ||
620 | handled |= IRQ_LDI; | |
621 | } | |
622 | ||
623 | if (status & IRQ_RXPSI) | |
624 | handled |= IRQ_RXPSI; | |
625 | ||
626 | if (status & IRQ_TXI) { | |
627 | handled |= IRQ_TXI; | |
628 | ||
629 | /* no lock here, tx queue should have been stopped */ | |
630 | ||
631 | /* update our idea of how much tx space is available to the | |
632 | * system */ | |
633 | ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); | |
634 | ||
0dc7d2b3 JP |
635 | netif_dbg(ks, intr, ks->netdev, |
636 | "%s: txspace %d\n", __func__, ks->tx_space); | |
3ba81f3e BD |
637 | } |
638 | ||
639 | if (status & IRQ_RXI) | |
640 | handled |= IRQ_RXI; | |
641 | ||
642 | if (status & IRQ_SPIBEI) { | |
643 | dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); | |
644 | handled |= IRQ_SPIBEI; | |
645 | } | |
646 | ||
647 | ks8851_wrreg16(ks, KS_ISR, handled); | |
648 | ||
649 | if (status & IRQ_RXI) { | |
650 | /* the datasheet says to disable the rx interrupt during | |
651 | * packet read-out, however we're masking the interrupt | |
652 | * from the device so do not bother masking just the RX | |
653 | * from the device. */ | |
654 | ||
655 | ks8851_rx_pkts(ks); | |
656 | } | |
657 | ||
658 | /* if something stopped the rx process, probably due to wanting | |
659 | * to change the rx settings, then do something about restarting | |
660 | * it. */ | |
661 | if (status & IRQ_RXPSI) { | |
662 | struct ks8851_rxctrl *rxc = &ks->rxctrl; | |
663 | ||
664 | /* update the multicast hash table */ | |
665 | ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); | |
666 | ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); | |
667 | ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); | |
668 | ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); | |
669 | ||
670 | ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); | |
671 | ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); | |
672 | } | |
673 | ||
674 | mutex_unlock(&ks->lock); | |
675 | ||
062e55e3 SB |
676 | if (status & IRQ_LCI) |
677 | mii_check_link(&ks->mii); | |
678 | ||
3ba81f3e BD |
679 | if (status & IRQ_TXI) |
680 | netif_wake_queue(ks->netdev); | |
681 | ||
656a05c8 | 682 | return IRQ_HANDLED; |
3ba81f3e BD |
683 | } |
684 | ||
685 | /** | |
686 | * calc_txlen - calculate size of message to send packet | |
25985edc | 687 | * @len: Length of data |
3ba81f3e BD |
688 | * |
689 | * Returns the size of the TXFIFO message needed to send | |
690 | * this packet. | |
691 | */ | |
692 | static inline unsigned calc_txlen(unsigned len) | |
693 | { | |
694 | return ALIGN(len + 4, 4); | |
695 | } | |
696 | ||
697 | /** | |
698 | * ks8851_wrpkt - write packet to TX FIFO | |
699 | * @ks: The device state. | |
700 | * @txp: The sk_buff to transmit. | |
701 | * @irq: IRQ on completion of the packet. | |
702 | * | |
703 | * Send the @txp to the chip. This means creating the relevant packet header | |
704 | * specifying the length of the packet and the other information the chip | |
705 | * needs, such as IRQ on completion. Send the header and the packet data to | |
706 | * the device. | |
707 | */ | |
708 | static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) | |
709 | { | |
710 | struct spi_transfer *xfer = ks->spi_xfer2; | |
711 | struct spi_message *msg = &ks->spi_msg2; | |
712 | unsigned fid = 0; | |
713 | int ret; | |
714 | ||
0dc7d2b3 JP |
715 | netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", |
716 | __func__, txp, txp->len, txp->data, irq); | |
3ba81f3e BD |
717 | |
718 | fid = ks->fid++; | |
719 | fid &= TXFR_TXFID_MASK; | |
720 | ||
721 | if (irq) | |
722 | fid |= TXFR_TXIC; /* irq on completion */ | |
723 | ||
724 | /* start header at txb[1] to align txw entries */ | |
725 | ks->txh.txb[1] = KS_SPIOP_TXFIFO; | |
726 | ks->txh.txw[1] = cpu_to_le16(fid); | |
727 | ks->txh.txw[2] = cpu_to_le16(txp->len); | |
728 | ||
729 | xfer->tx_buf = &ks->txh.txb[1]; | |
730 | xfer->rx_buf = NULL; | |
731 | xfer->len = 5; | |
732 | ||
733 | xfer++; | |
734 | xfer->tx_buf = txp->data; | |
735 | xfer->rx_buf = NULL; | |
736 | xfer->len = ALIGN(txp->len, 4); | |
737 | ||
738 | ret = spi_sync(ks->spidev, msg); | |
739 | if (ret < 0) | |
0dc7d2b3 | 740 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
741 | } |
742 | ||
743 | /** | |
744 | * ks8851_done_tx - update and then free skbuff after transmitting | |
745 | * @ks: The device state | |
746 | * @txb: The buffer transmitted | |
747 | */ | |
748 | static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) | |
749 | { | |
750 | struct net_device *dev = ks->netdev; | |
751 | ||
752 | dev->stats.tx_bytes += txb->len; | |
753 | dev->stats.tx_packets++; | |
754 | ||
755 | dev_kfree_skb(txb); | |
756 | } | |
757 | ||
758 | /** | |
759 | * ks8851_tx_work - process tx packet(s) | |
760 | * @work: The work strucutre what was scheduled. | |
761 | * | |
762 | * This is called when a number of packets have been scheduled for | |
763 | * transmission and need to be sent to the device. | |
764 | */ | |
765 | static void ks8851_tx_work(struct work_struct *work) | |
766 | { | |
767 | struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); | |
768 | struct sk_buff *txb; | |
3320eae5 | 769 | bool last = skb_queue_empty(&ks->txq); |
3ba81f3e BD |
770 | |
771 | mutex_lock(&ks->lock); | |
772 | ||
773 | while (!last) { | |
774 | txb = skb_dequeue(&ks->txq); | |
775 | last = skb_queue_empty(&ks->txq); | |
776 | ||
761172fb AA |
777 | if (txb != NULL) { |
778 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); | |
779 | ks8851_wrpkt(ks, txb, last); | |
780 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
781 | ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); | |
3ba81f3e | 782 | |
761172fb AA |
783 | ks8851_done_tx(ks, txb); |
784 | } | |
3ba81f3e BD |
785 | } |
786 | ||
787 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
788 | } |
789 | ||
790 | /** | |
791 | * ks8851_net_open - open network device | |
792 | * @dev: The network device being opened. | |
793 | * | |
794 | * Called when the network device is marked active, such as a user executing | |
795 | * 'ifconfig up' on the device. | |
796 | */ | |
797 | static int ks8851_net_open(struct net_device *dev) | |
798 | { | |
799 | struct ks8851_net *ks = netdev_priv(dev); | |
800 | ||
801 | /* lock the card, even if we may not actually be doing anything | |
802 | * else at the moment */ | |
803 | mutex_lock(&ks->lock); | |
804 | ||
0dc7d2b3 | 805 | netif_dbg(ks, ifup, ks->netdev, "opening\n"); |
3ba81f3e BD |
806 | |
807 | /* bring chip out of any power saving mode it was in */ | |
808 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
809 | ||
810 | /* issue a soft reset to the RX/TX QMU to put it into a known | |
811 | * state. */ | |
812 | ks8851_soft_reset(ks, GRR_QMU); | |
813 | ||
814 | /* setup transmission parameters */ | |
815 | ||
816 | ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ | |
817 | TXCR_TXPE | /* pad to min length */ | |
818 | TXCR_TXCRC | /* add CRC */ | |
819 | TXCR_TXFCE)); /* enable flow control */ | |
820 | ||
821 | /* auto-increment tx data, reset tx pointer */ | |
822 | ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); | |
823 | ||
824 | /* setup receiver control */ | |
825 | ||
826 | ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ | |
827 | RXCR1_RXFCE | /* enable flow control */ | |
828 | RXCR1_RXBE | /* broadcast enable */ | |
829 | RXCR1_RXUE | /* unicast enable */ | |
830 | RXCR1_RXE)); /* enable rx block */ | |
831 | ||
832 | /* transfer entire frames out in one go */ | |
833 | ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); | |
834 | ||
835 | /* set receive counter timeouts */ | |
836 | ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ | |
837 | ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ | |
838 | ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ | |
839 | ||
840 | ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ | |
841 | RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ | |
842 | RXQCR_RXDTTE); /* IRQ on time exceeded */ | |
843 | ||
844 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
845 | ||
846 | /* clear then enable interrupts */ | |
847 | ||
848 | #define STD_IRQ (IRQ_LCI | /* Link Change */ \ | |
849 | IRQ_TXI | /* TX done */ \ | |
850 | IRQ_RXI | /* RX done */ \ | |
851 | IRQ_SPIBEI | /* SPI bus error */ \ | |
852 | IRQ_TXPSI | /* TX process stop */ \ | |
853 | IRQ_RXPSI) /* RX process stop */ | |
854 | ||
855 | ks->rc_ier = STD_IRQ; | |
856 | ks8851_wrreg16(ks, KS_ISR, STD_IRQ); | |
857 | ks8851_wrreg16(ks, KS_IER, STD_IRQ); | |
858 | ||
859 | netif_start_queue(ks->netdev); | |
860 | ||
0dc7d2b3 | 861 | netif_dbg(ks, ifup, ks->netdev, "network device up\n"); |
3ba81f3e BD |
862 | |
863 | mutex_unlock(&ks->lock); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | /** | |
868 | * ks8851_net_stop - close network device | |
869 | * @dev: The device being closed. | |
870 | * | |
871 | * Called to close down a network device which has been active. Cancell any | |
872 | * work, shutdown the RX and TX process and then place the chip into a low | |
873 | * power state whilst it is not being used. | |
874 | */ | |
875 | static int ks8851_net_stop(struct net_device *dev) | |
876 | { | |
877 | struct ks8851_net *ks = netdev_priv(dev); | |
878 | ||
0dc7d2b3 | 879 | netif_info(ks, ifdown, dev, "shutting down\n"); |
3ba81f3e BD |
880 | |
881 | netif_stop_queue(dev); | |
882 | ||
883 | mutex_lock(&ks->lock); | |
c5a99937 SB |
884 | /* turn off the IRQs and ack any outstanding */ |
885 | ks8851_wrreg16(ks, KS_IER, 0x0000); | |
886 | ks8851_wrreg16(ks, KS_ISR, 0xffff); | |
887 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
888 | |
889 | /* stop any outstanding work */ | |
3ba81f3e BD |
890 | flush_work(&ks->tx_work); |
891 | flush_work(&ks->rxctrl_work); | |
892 | ||
c5a99937 | 893 | mutex_lock(&ks->lock); |
3ba81f3e BD |
894 | /* shutdown RX process */ |
895 | ks8851_wrreg16(ks, KS_RXCR1, 0x0000); | |
896 | ||
897 | /* shutdown TX process */ | |
898 | ks8851_wrreg16(ks, KS_TXCR, 0x0000); | |
899 | ||
900 | /* set powermode to soft power down to save power */ | |
901 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
c5a99937 | 902 | mutex_unlock(&ks->lock); |
3ba81f3e BD |
903 | |
904 | /* ensure any queued tx buffers are dumped */ | |
905 | while (!skb_queue_empty(&ks->txq)) { | |
906 | struct sk_buff *txb = skb_dequeue(&ks->txq); | |
907 | ||
0dc7d2b3 JP |
908 | netif_dbg(ks, ifdown, ks->netdev, |
909 | "%s: freeing txb %p\n", __func__, txb); | |
3ba81f3e BD |
910 | |
911 | dev_kfree_skb(txb); | |
912 | } | |
913 | ||
3ba81f3e BD |
914 | return 0; |
915 | } | |
916 | ||
917 | /** | |
918 | * ks8851_start_xmit - transmit packet | |
919 | * @skb: The buffer to transmit | |
920 | * @dev: The device used to transmit the packet. | |
921 | * | |
922 | * Called by the network layer to transmit the @skb. Queue the packet for | |
923 | * the device and schedule the necessary work to transmit the packet when | |
924 | * it is free. | |
925 | * | |
926 | * We do this to firstly avoid sleeping with the network device locked, | |
927 | * and secondly so we can round up more than one packet to transmit which | |
928 | * means we can try and avoid generating too many transmit done interrupts. | |
929 | */ | |
61357325 SH |
930 | static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, |
931 | struct net_device *dev) | |
3ba81f3e BD |
932 | { |
933 | struct ks8851_net *ks = netdev_priv(dev); | |
934 | unsigned needed = calc_txlen(skb->len); | |
61357325 | 935 | netdev_tx_t ret = NETDEV_TX_OK; |
3ba81f3e | 936 | |
0dc7d2b3 JP |
937 | netif_dbg(ks, tx_queued, ks->netdev, |
938 | "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); | |
3ba81f3e BD |
939 | |
940 | spin_lock(&ks->statelock); | |
941 | ||
942 | if (needed > ks->tx_space) { | |
943 | netif_stop_queue(dev); | |
944 | ret = NETDEV_TX_BUSY; | |
945 | } else { | |
946 | ks->tx_space -= needed; | |
947 | skb_queue_tail(&ks->txq, skb); | |
948 | } | |
949 | ||
950 | spin_unlock(&ks->statelock); | |
951 | schedule_work(&ks->tx_work); | |
952 | ||
953 | return ret; | |
954 | } | |
955 | ||
956 | /** | |
957 | * ks8851_rxctrl_work - work handler to change rx mode | |
958 | * @work: The work structure this belongs to. | |
959 | * | |
960 | * Lock the device and issue the necessary changes to the receive mode from | |
961 | * the network device layer. This is done so that we can do this without | |
962 | * having to sleep whilst holding the network device lock. | |
963 | * | |
964 | * Since the recommendation from Micrel is that the RXQ is shutdown whilst the | |
965 | * receive parameters are programmed, we issue a write to disable the RXQ and | |
966 | * then wait for the interrupt handler to be triggered once the RXQ shutdown is | |
967 | * complete. The interrupt handler then writes the new values into the chip. | |
968 | */ | |
969 | static void ks8851_rxctrl_work(struct work_struct *work) | |
970 | { | |
971 | struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); | |
972 | ||
973 | mutex_lock(&ks->lock); | |
974 | ||
975 | /* need to shutdown RXQ before modifying filter parameters */ | |
976 | ks8851_wrreg16(ks, KS_RXCR1, 0x00); | |
977 | ||
978 | mutex_unlock(&ks->lock); | |
979 | } | |
980 | ||
981 | static void ks8851_set_rx_mode(struct net_device *dev) | |
982 | { | |
983 | struct ks8851_net *ks = netdev_priv(dev); | |
984 | struct ks8851_rxctrl rxctrl; | |
985 | ||
986 | memset(&rxctrl, 0, sizeof(rxctrl)); | |
987 | ||
988 | if (dev->flags & IFF_PROMISC) { | |
989 | /* interface to receive everything */ | |
990 | ||
991 | rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; | |
992 | } else if (dev->flags & IFF_ALLMULTI) { | |
993 | /* accept all multicast packets */ | |
994 | ||
995 | rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | | |
996 | RXCR1_RXPAFMA | RXCR1_RXMAFMA); | |
4cd24eaf | 997 | } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { |
22bedad3 | 998 | struct netdev_hw_addr *ha; |
3ba81f3e | 999 | u32 crc; |
3ba81f3e BD |
1000 | |
1001 | /* accept some multicast */ | |
1002 | ||
22bedad3 JP |
1003 | netdev_for_each_mc_addr(ha, dev) { |
1004 | crc = ether_crc(ETH_ALEN, ha->addr); | |
3ba81f3e BD |
1005 | crc >>= (32 - 6); /* get top six bits */ |
1006 | ||
1007 | rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); | |
3ba81f3e BD |
1008 | } |
1009 | ||
b6a71bfa | 1010 | rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; |
3ba81f3e BD |
1011 | } else { |
1012 | /* just accept broadcast / unicast */ | |
1013 | rxctrl.rxcr1 = RXCR1_RXPAFMA; | |
1014 | } | |
1015 | ||
1016 | rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ | |
1017 | RXCR1_RXBE | /* broadcast enable */ | |
1018 | RXCR1_RXE | /* RX process enable */ | |
1019 | RXCR1_RXFCE); /* enable flow control */ | |
1020 | ||
1021 | rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; | |
1022 | ||
1023 | /* schedule work to do the actual set of the data if needed */ | |
1024 | ||
1025 | spin_lock(&ks->statelock); | |
1026 | ||
1027 | if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { | |
1028 | memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); | |
1029 | schedule_work(&ks->rxctrl_work); | |
1030 | } | |
1031 | ||
1032 | spin_unlock(&ks->statelock); | |
1033 | } | |
1034 | ||
1035 | static int ks8851_set_mac_address(struct net_device *dev, void *addr) | |
1036 | { | |
1037 | struct sockaddr *sa = addr; | |
1038 | ||
1039 | if (netif_running(dev)) | |
1040 | return -EBUSY; | |
1041 | ||
1042 | if (!is_valid_ether_addr(sa->sa_data)) | |
1043 | return -EADDRNOTAVAIL; | |
1044 | ||
1045 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); | |
1046 | return ks8851_write_mac_addr(dev); | |
1047 | } | |
1048 | ||
1049 | static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) | |
1050 | { | |
1051 | struct ks8851_net *ks = netdev_priv(dev); | |
1052 | ||
1053 | if (!netif_running(dev)) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); | |
1057 | } | |
1058 | ||
1059 | static const struct net_device_ops ks8851_netdev_ops = { | |
1060 | .ndo_open = ks8851_net_open, | |
1061 | .ndo_stop = ks8851_net_stop, | |
1062 | .ndo_do_ioctl = ks8851_net_ioctl, | |
1063 | .ndo_start_xmit = ks8851_start_xmit, | |
1064 | .ndo_set_mac_address = ks8851_set_mac_address, | |
1065 | .ndo_set_rx_mode = ks8851_set_rx_mode, | |
1066 | .ndo_change_mtu = eth_change_mtu, | |
1067 | .ndo_validate_addr = eth_validate_addr, | |
1068 | }; | |
1069 | ||
1070 | /* ethtool support */ | |
1071 | ||
1072 | static void ks8851_get_drvinfo(struct net_device *dev, | |
1073 | struct ethtool_drvinfo *di) | |
1074 | { | |
1075 | strlcpy(di->driver, "KS8851", sizeof(di->driver)); | |
1076 | strlcpy(di->version, "1.00", sizeof(di->version)); | |
1077 | strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); | |
1078 | } | |
1079 | ||
1080 | static u32 ks8851_get_msglevel(struct net_device *dev) | |
1081 | { | |
1082 | struct ks8851_net *ks = netdev_priv(dev); | |
1083 | return ks->msg_enable; | |
1084 | } | |
1085 | ||
1086 | static void ks8851_set_msglevel(struct net_device *dev, u32 to) | |
1087 | { | |
1088 | struct ks8851_net *ks = netdev_priv(dev); | |
1089 | ks->msg_enable = to; | |
1090 | } | |
1091 | ||
1092 | static int ks8851_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1093 | { | |
1094 | struct ks8851_net *ks = netdev_priv(dev); | |
1095 | return mii_ethtool_gset(&ks->mii, cmd); | |
1096 | } | |
1097 | ||
1098 | static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1099 | { | |
1100 | struct ks8851_net *ks = netdev_priv(dev); | |
1101 | return mii_ethtool_sset(&ks->mii, cmd); | |
1102 | } | |
1103 | ||
1104 | static u32 ks8851_get_link(struct net_device *dev) | |
1105 | { | |
1106 | struct ks8851_net *ks = netdev_priv(dev); | |
1107 | return mii_link_ok(&ks->mii); | |
1108 | } | |
1109 | ||
1110 | static int ks8851_nway_reset(struct net_device *dev) | |
1111 | { | |
1112 | struct ks8851_net *ks = netdev_priv(dev); | |
1113 | return mii_nway_restart(&ks->mii); | |
1114 | } | |
1115 | ||
51b7b1c3 | 1116 | /* EEPROM support */ |
a84afa40 | 1117 | |
51b7b1c3 | 1118 | static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee) |
a84afa40 | 1119 | { |
51b7b1c3 BD |
1120 | struct ks8851_net *ks = ee->data; |
1121 | unsigned val; | |
a84afa40 | 1122 | |
51b7b1c3 | 1123 | val = ks8851_rdreg16(ks, KS_EEPCR); |
a84afa40 | 1124 | |
51b7b1c3 BD |
1125 | ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0; |
1126 | ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0; | |
1127 | ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0; | |
1128 | } | |
a84afa40 | 1129 | |
51b7b1c3 BD |
1130 | static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee) |
1131 | { | |
1132 | struct ks8851_net *ks = ee->data; | |
1133 | unsigned val = EEPCR_EESA; /* default - eeprom access on */ | |
1134 | ||
1135 | if (ee->drive_data) | |
1136 | val |= EEPCR_EESRWA; | |
1137 | if (ee->reg_data_in) | |
1138 | val |= EEPCR_EEDO; | |
1139 | if (ee->reg_data_clock) | |
1140 | val |= EEPCR_EESCK; | |
1141 | if (ee->reg_chip_select) | |
1142 | val |= EEPCR_EECS; | |
1143 | ||
1144 | ks8851_wrreg16(ks, KS_EEPCR, val); | |
1145 | } | |
a84afa40 | 1146 | |
51b7b1c3 BD |
1147 | /** |
1148 | * ks8851_eeprom_claim - claim device EEPROM and activate the interface | |
1149 | * @ks: The network device state. | |
1150 | * | |
1151 | * Check for the presence of an EEPROM, and then activate software access | |
1152 | * to the device. | |
1153 | */ | |
1154 | static int ks8851_eeprom_claim(struct ks8851_net *ks) | |
1155 | { | |
1156 | if (!(ks->rc_ccr & CCR_EEPROM)) | |
1157 | return -ENOENT; | |
a84afa40 | 1158 | |
51b7b1c3 | 1159 | mutex_lock(&ks->lock); |
a84afa40 | 1160 | |
51b7b1c3 BD |
1161 | /* start with clock low, cs high */ |
1162 | ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS); | |
1163 | return 0; | |
1164 | } | |
a84afa40 | 1165 | |
51b7b1c3 BD |
1166 | /** |
1167 | * ks8851_eeprom_release - release the EEPROM interface | |
1168 | * @ks: The device state | |
1169 | * | |
1170 | * Release the software access to the device EEPROM | |
1171 | */ | |
1172 | static void ks8851_eeprom_release(struct ks8851_net *ks) | |
1173 | { | |
1174 | unsigned val = ks8851_rdreg16(ks, KS_EEPCR); | |
a84afa40 | 1175 | |
51b7b1c3 BD |
1176 | ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA); |
1177 | mutex_unlock(&ks->lock); | |
a84afa40 SJ |
1178 | } |
1179 | ||
51b7b1c3 BD |
1180 | #define KS_EEPROM_MAGIC (0x00008851) |
1181 | ||
a84afa40 | 1182 | static int ks8851_set_eeprom(struct net_device *dev, |
51b7b1c3 | 1183 | struct ethtool_eeprom *ee, u8 *data) |
a84afa40 SJ |
1184 | { |
1185 | struct ks8851_net *ks = netdev_priv(dev); | |
51b7b1c3 BD |
1186 | int offset = ee->offset; |
1187 | int len = ee->len; | |
1188 | u16 tmp; | |
1189 | ||
1190 | /* currently only support byte writing */ | |
1191 | if (len != 1) | |
a84afa40 SJ |
1192 | return -EINVAL; |
1193 | ||
51b7b1c3 BD |
1194 | if (ee->magic != KS_EEPROM_MAGIC) |
1195 | return -EINVAL; | |
a84afa40 | 1196 | |
51b7b1c3 BD |
1197 | if (ks8851_eeprom_claim(ks)) |
1198 | return -ENOENT; | |
1199 | ||
1200 | eeprom_93cx6_wren(&ks->eeprom, true); | |
1201 | ||
1202 | /* ethtool currently only supports writing bytes, which means | |
1203 | * we have to read/modify/write our 16bit EEPROMs */ | |
a84afa40 | 1204 | |
51b7b1c3 | 1205 | eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp); |
a84afa40 | 1206 | |
51b7b1c3 BD |
1207 | if (offset & 1) { |
1208 | tmp &= 0xff; | |
1209 | tmp |= *data << 8; | |
1210 | } else { | |
1211 | tmp &= 0xff00; | |
1212 | tmp |= *data; | |
a84afa40 | 1213 | } |
a84afa40 | 1214 | |
51b7b1c3 BD |
1215 | eeprom_93cx6_write(&ks->eeprom, offset/2, tmp); |
1216 | eeprom_93cx6_wren(&ks->eeprom, false); | |
1217 | ||
1218 | ks8851_eeprom_release(ks); | |
1219 | ||
1220 | return 0; | |
1221 | } | |
a84afa40 | 1222 | |
51b7b1c3 BD |
1223 | static int ks8851_get_eeprom(struct net_device *dev, |
1224 | struct ethtool_eeprom *ee, u8 *data) | |
1225 | { | |
1226 | struct ks8851_net *ks = netdev_priv(dev); | |
1227 | int offset = ee->offset; | |
1228 | int len = ee->len; | |
a84afa40 | 1229 | |
51b7b1c3 BD |
1230 | /* must be 2 byte aligned */ |
1231 | if (len & 1 || offset & 1) | |
1232 | return -EINVAL; | |
a84afa40 | 1233 | |
51b7b1c3 BD |
1234 | if (ks8851_eeprom_claim(ks)) |
1235 | return -ENOENT; | |
a84afa40 | 1236 | |
51b7b1c3 | 1237 | ee->magic = KS_EEPROM_MAGIC; |
a84afa40 | 1238 | |
51b7b1c3 BD |
1239 | eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2); |
1240 | ks8851_eeprom_release(ks); | |
a84afa40 | 1241 | |
51b7b1c3 BD |
1242 | return 0; |
1243 | } | |
a84afa40 | 1244 | |
51b7b1c3 BD |
1245 | static int ks8851_get_eeprom_len(struct net_device *dev) |
1246 | { | |
1247 | struct ks8851_net *ks = netdev_priv(dev); | |
1248 | ||
1249 | /* currently, we assume it is an 93C46 attached, so return 128 */ | |
1250 | return ks->rc_ccr & CCR_EEPROM ? 128 : 0; | |
a84afa40 SJ |
1251 | } |
1252 | ||
3ba81f3e BD |
1253 | static const struct ethtool_ops ks8851_ethtool_ops = { |
1254 | .get_drvinfo = ks8851_get_drvinfo, | |
1255 | .get_msglevel = ks8851_get_msglevel, | |
1256 | .set_msglevel = ks8851_set_msglevel, | |
1257 | .get_settings = ks8851_get_settings, | |
1258 | .set_settings = ks8851_set_settings, | |
1259 | .get_link = ks8851_get_link, | |
1260 | .nway_reset = ks8851_nway_reset, | |
a84afa40 SJ |
1261 | .get_eeprom_len = ks8851_get_eeprom_len, |
1262 | .get_eeprom = ks8851_get_eeprom, | |
1263 | .set_eeprom = ks8851_set_eeprom, | |
3ba81f3e BD |
1264 | }; |
1265 | ||
1266 | /* MII interface controls */ | |
1267 | ||
1268 | /** | |
1269 | * ks8851_phy_reg - convert MII register into a KS8851 register | |
1270 | * @reg: MII register number. | |
1271 | * | |
1272 | * Return the KS8851 register number for the corresponding MII PHY register | |
1273 | * if possible. Return zero if the MII register has no direct mapping to the | |
1274 | * KS8851 register set. | |
1275 | */ | |
1276 | static int ks8851_phy_reg(int reg) | |
1277 | { | |
1278 | switch (reg) { | |
1279 | case MII_BMCR: | |
1280 | return KS_P1MBCR; | |
1281 | case MII_BMSR: | |
1282 | return KS_P1MBSR; | |
1283 | case MII_PHYSID1: | |
1284 | return KS_PHY1ILR; | |
1285 | case MII_PHYSID2: | |
1286 | return KS_PHY1IHR; | |
1287 | case MII_ADVERTISE: | |
1288 | return KS_P1ANAR; | |
1289 | case MII_LPA: | |
1290 | return KS_P1ANLPR; | |
1291 | } | |
1292 | ||
1293 | return 0x0; | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * ks8851_phy_read - MII interface PHY register read. | |
1298 | * @dev: The network device the PHY is on. | |
1299 | * @phy_addr: Address of PHY (ignored as we only have one) | |
1300 | * @reg: The register to read. | |
1301 | * | |
1302 | * This call reads data from the PHY register specified in @reg. Since the | |
25985edc | 1303 | * device does not support all the MII registers, the non-existent values |
3ba81f3e BD |
1304 | * are always returned as zero. |
1305 | * | |
1306 | * We return zero for unsupported registers as the MII code does not check | |
1307 | * the value returned for any error status, and simply returns it to the | |
1308 | * caller. The mii-tool that the driver was tested with takes any -ve error | |
1309 | * as real PHY capabilities, thus displaying incorrect data to the user. | |
1310 | */ | |
1311 | static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) | |
1312 | { | |
1313 | struct ks8851_net *ks = netdev_priv(dev); | |
1314 | int ksreg; | |
1315 | int result; | |
1316 | ||
1317 | ksreg = ks8851_phy_reg(reg); | |
1318 | if (!ksreg) | |
1319 | return 0x0; /* no error return allowed, so use zero */ | |
1320 | ||
1321 | mutex_lock(&ks->lock); | |
1322 | result = ks8851_rdreg16(ks, ksreg); | |
1323 | mutex_unlock(&ks->lock); | |
1324 | ||
1325 | return result; | |
1326 | } | |
1327 | ||
1328 | static void ks8851_phy_write(struct net_device *dev, | |
1329 | int phy, int reg, int value) | |
1330 | { | |
1331 | struct ks8851_net *ks = netdev_priv(dev); | |
1332 | int ksreg; | |
1333 | ||
1334 | ksreg = ks8851_phy_reg(reg); | |
1335 | if (ksreg) { | |
1336 | mutex_lock(&ks->lock); | |
1337 | ks8851_wrreg16(ks, ksreg, value); | |
1338 | mutex_unlock(&ks->lock); | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | /** | |
1343 | * ks8851_read_selftest - read the selftest memory info. | |
1344 | * @ks: The device state | |
1345 | * | |
1346 | * Read and check the TX/RX memory selftest information. | |
1347 | */ | |
1348 | static int ks8851_read_selftest(struct ks8851_net *ks) | |
1349 | { | |
1350 | unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; | |
1351 | int ret = 0; | |
1352 | unsigned rd; | |
1353 | ||
1354 | rd = ks8851_rdreg16(ks, KS_MBIR); | |
1355 | ||
1356 | if ((rd & both_done) != both_done) { | |
0dc7d2b3 | 1357 | netdev_warn(ks->netdev, "Memory selftest not finished\n"); |
3ba81f3e BD |
1358 | return 0; |
1359 | } | |
1360 | ||
1361 | if (rd & MBIR_TXMBFA) { | |
0dc7d2b3 | 1362 | netdev_err(ks->netdev, "TX memory selftest fail\n"); |
3ba81f3e BD |
1363 | ret |= 1; |
1364 | } | |
1365 | ||
1366 | if (rd & MBIR_RXMBFA) { | |
0dc7d2b3 | 1367 | netdev_err(ks->netdev, "RX memory selftest fail\n"); |
3ba81f3e BD |
1368 | ret |= 2; |
1369 | } | |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | /* driver bus management functions */ | |
1375 | ||
d5b40921 LPC |
1376 | #ifdef CONFIG_PM_SLEEP |
1377 | ||
1378 | static int ks8851_suspend(struct device *dev) | |
1d5439b9 | 1379 | { |
d5b40921 LPC |
1380 | struct ks8851_net *ks = dev_get_drvdata(dev); |
1381 | struct net_device *netdev = ks->netdev; | |
1d5439b9 | 1382 | |
d5b40921 LPC |
1383 | if (netif_running(netdev)) { |
1384 | netif_device_detach(netdev); | |
1385 | ks8851_net_stop(netdev); | |
1d5439b9 AA |
1386 | } |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
d5b40921 | 1391 | static int ks8851_resume(struct device *dev) |
1d5439b9 | 1392 | { |
d5b40921 LPC |
1393 | struct ks8851_net *ks = dev_get_drvdata(dev); |
1394 | struct net_device *netdev = ks->netdev; | |
1d5439b9 | 1395 | |
d5b40921 LPC |
1396 | if (netif_running(netdev)) { |
1397 | ks8851_net_open(netdev); | |
1398 | netif_device_attach(netdev); | |
1d5439b9 AA |
1399 | } |
1400 | ||
1401 | return 0; | |
1402 | } | |
8ac2b3c0 | 1403 | #endif |
d5b40921 LPC |
1404 | |
1405 | static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume); | |
1d5439b9 | 1406 | |
654b8c5c | 1407 | static int ks8851_probe(struct spi_device *spi) |
3ba81f3e BD |
1408 | { |
1409 | struct net_device *ndev; | |
1410 | struct ks8851_net *ks; | |
1411 | int ret; | |
51c61a28 | 1412 | unsigned cider; |
73fdeb82 | 1413 | int gpio; |
3ba81f3e BD |
1414 | |
1415 | ndev = alloc_etherdev(sizeof(struct ks8851_net)); | |
41de8d4c | 1416 | if (!ndev) |
3ba81f3e | 1417 | return -ENOMEM; |
3ba81f3e BD |
1418 | |
1419 | spi->bits_per_word = 8; | |
1420 | ||
1421 | ks = netdev_priv(ndev); | |
1422 | ||
1423 | ks->netdev = ndev; | |
1424 | ks->spidev = spi; | |
1425 | ks->tx_space = 6144; | |
1426 | ||
73fdeb82 SB |
1427 | gpio = of_get_named_gpio_flags(spi->dev.of_node, "reset-gpios", |
1428 | 0, NULL); | |
1429 | if (gpio == -EPROBE_DEFER) { | |
1430 | ret = gpio; | |
1431 | goto err_gpio; | |
1432 | } | |
1433 | ||
1434 | ks->gpio = gpio; | |
1435 | if (gpio_is_valid(gpio)) { | |
1436 | ret = devm_gpio_request_one(&spi->dev, gpio, | |
1437 | GPIOF_OUT_INIT_LOW, "ks8851_rst_n"); | |
1438 | if (ret) { | |
1439 | dev_err(&spi->dev, "reset gpio request failed\n"); | |
1440 | goto err_gpio; | |
1441 | } | |
1442 | } | |
1443 | ||
d64eed1d | 1444 | ks->vdd_io = devm_regulator_get(&spi->dev, "vdd-io"); |
73fdeb82 SB |
1445 | if (IS_ERR(ks->vdd_io)) { |
1446 | ret = PTR_ERR(ks->vdd_io); | |
d64eed1d SB |
1447 | goto err_reg_io; |
1448 | } | |
1449 | ||
1450 | ret = regulator_enable(ks->vdd_io); | |
1451 | if (ret) { | |
1452 | dev_err(&spi->dev, "regulator vdd_io enable fail: %d\n", | |
1453 | ret); | |
1454 | goto err_reg_io; | |
73fdeb82 SB |
1455 | } |
1456 | ||
d64eed1d | 1457 | ks->vdd_reg = devm_regulator_get(&spi->dev, "vdd"); |
ebf4ad95 NM |
1458 | if (IS_ERR(ks->vdd_reg)) { |
1459 | ret = PTR_ERR(ks->vdd_reg); | |
d64eed1d SB |
1460 | goto err_reg; |
1461 | } | |
1462 | ||
1463 | ret = regulator_enable(ks->vdd_reg); | |
1464 | if (ret) { | |
1465 | dev_err(&spi->dev, "regulator vdd enable fail: %d\n", | |
1466 | ret); | |
1467 | goto err_reg; | |
ebf4ad95 NM |
1468 | } |
1469 | ||
73fdeb82 SB |
1470 | if (gpio_is_valid(gpio)) { |
1471 | usleep_range(10000, 11000); | |
1472 | gpio_set_value(gpio, 1); | |
1473 | } | |
ebf4ad95 | 1474 | |
3ba81f3e BD |
1475 | mutex_init(&ks->lock); |
1476 | spin_lock_init(&ks->statelock); | |
1477 | ||
1478 | INIT_WORK(&ks->tx_work, ks8851_tx_work); | |
3ba81f3e BD |
1479 | INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); |
1480 | ||
1481 | /* initialise pre-made spi transfer messages */ | |
1482 | ||
1483 | spi_message_init(&ks->spi_msg1); | |
1484 | spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); | |
1485 | ||
1486 | spi_message_init(&ks->spi_msg2); | |
1487 | spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); | |
1488 | spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); | |
1489 | ||
51b7b1c3 BD |
1490 | /* setup EEPROM state */ |
1491 | ||
1492 | ks->eeprom.data = ks; | |
1493 | ks->eeprom.width = PCI_EEPROM_WIDTH_93C46; | |
1494 | ks->eeprom.register_read = ks8851_eeprom_regread; | |
1495 | ks->eeprom.register_write = ks8851_eeprom_regwrite; | |
1496 | ||
3ba81f3e BD |
1497 | /* setup mii state */ |
1498 | ks->mii.dev = ndev; | |
1499 | ks->mii.phy_id = 1, | |
1500 | ks->mii.phy_id_mask = 1; | |
1501 | ks->mii.reg_num_mask = 0xf; | |
1502 | ks->mii.mdio_read = ks8851_phy_read; | |
1503 | ks->mii.mdio_write = ks8851_phy_write; | |
1504 | ||
1505 | dev_info(&spi->dev, "message enable is %d\n", msg_enable); | |
1506 | ||
1507 | /* set the default message enable */ | |
1508 | ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | | |
1509 | NETIF_MSG_PROBE | | |
1510 | NETIF_MSG_LINK)); | |
1511 | ||
1512 | skb_queue_head_init(&ks->txq); | |
1513 | ||
7ad24ea4 | 1514 | ndev->ethtool_ops = &ks8851_ethtool_ops; |
3ba81f3e BD |
1515 | SET_NETDEV_DEV(ndev, &spi->dev); |
1516 | ||
8f996607 | 1517 | spi_set_drvdata(spi, ks); |
3ba81f3e BD |
1518 | |
1519 | ndev->if_port = IF_PORT_100BASET; | |
1520 | ndev->netdev_ops = &ks8851_netdev_ops; | |
1521 | ndev->irq = spi->irq; | |
1522 | ||
57dada68 BD |
1523 | /* issue a global soft reset to reset the device. */ |
1524 | ks8851_soft_reset(ks, GRR_GSR); | |
1525 | ||
3ba81f3e | 1526 | /* simple check for a valid chip being connected to the bus */ |
51c61a28 MR |
1527 | cider = ks8851_rdreg16(ks, KS_CIDER); |
1528 | if ((cider & ~CIDER_REV_MASK) != CIDER_ID) { | |
3ba81f3e BD |
1529 | dev_err(&spi->dev, "failed to read device ID\n"); |
1530 | ret = -ENODEV; | |
1531 | goto err_id; | |
1532 | } | |
1533 | ||
7d997466 SJ |
1534 | /* cache the contents of the CCR register for EEPROM, etc. */ |
1535 | ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); | |
1536 | ||
1537 | if (ks->rc_ccr & CCR_EEPROM) | |
1538 | ks->eeprom_size = 128; | |
1539 | else | |
1540 | ks->eeprom_size = 0; | |
1541 | ||
3ba81f3e BD |
1542 | ks8851_read_selftest(ks); |
1543 | ks8851_init_mac(ks); | |
1544 | ||
656a05c8 FB |
1545 | ret = request_threaded_irq(spi->irq, NULL, ks8851_irq, |
1546 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1547 | ndev->name, ks); | |
3ba81f3e BD |
1548 | if (ret < 0) { |
1549 | dev_err(&spi->dev, "failed to get irq\n"); | |
1550 | goto err_irq; | |
1551 | } | |
1552 | ||
1553 | ret = register_netdev(ndev); | |
1554 | if (ret) { | |
1555 | dev_err(&spi->dev, "failed to register network device\n"); | |
1556 | goto err_netdev; | |
1557 | } | |
1558 | ||
a9a8de21 | 1559 | netdev_info(ndev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n", |
51c61a28 | 1560 | CIDER_REV_GET(cider), ndev->dev_addr, ndev->irq, |
a9a8de21 | 1561 | ks->rc_ccr & CCR_EEPROM ? "has" : "no"); |
3ba81f3e BD |
1562 | |
1563 | return 0; | |
1564 | ||
1565 | ||
1566 | err_netdev: | |
e8195b24 | 1567 | free_irq(ndev->irq, ks); |
3ba81f3e | 1568 | |
3ba81f3e | 1569 | err_irq: |
73fdeb82 SB |
1570 | if (gpio_is_valid(gpio)) |
1571 | gpio_set_value(gpio, 0); | |
ebf4ad95 | 1572 | err_id: |
d64eed1d | 1573 | regulator_disable(ks->vdd_reg); |
ebf4ad95 | 1574 | err_reg: |
d64eed1d | 1575 | regulator_disable(ks->vdd_io); |
73fdeb82 SB |
1576 | err_reg_io: |
1577 | err_gpio: | |
3ba81f3e BD |
1578 | free_netdev(ndev); |
1579 | return ret; | |
1580 | } | |
1581 | ||
654b8c5c | 1582 | static int ks8851_remove(struct spi_device *spi) |
3ba81f3e | 1583 | { |
8f996607 | 1584 | struct ks8851_net *priv = spi_get_drvdata(spi); |
3ba81f3e BD |
1585 | |
1586 | if (netif_msg_drv(priv)) | |
0dc7d2b3 | 1587 | dev_info(&spi->dev, "remove\n"); |
3ba81f3e BD |
1588 | |
1589 | unregister_netdev(priv->netdev); | |
1590 | free_irq(spi->irq, priv); | |
73fdeb82 SB |
1591 | if (gpio_is_valid(priv->gpio)) |
1592 | gpio_set_value(priv->gpio, 0); | |
d64eed1d SB |
1593 | regulator_disable(priv->vdd_reg); |
1594 | regulator_disable(priv->vdd_io); | |
3ba81f3e BD |
1595 | free_netdev(priv->netdev); |
1596 | ||
1597 | return 0; | |
1598 | } | |
1599 | ||
f4c6e06d SB |
1600 | static const struct of_device_id ks8851_match_table[] = { |
1601 | { .compatible = "micrel,ks8851" }, | |
1602 | { } | |
1603 | }; | |
88c79664 | 1604 | MODULE_DEVICE_TABLE(of, ks8851_match_table); |
f4c6e06d | 1605 | |
3ba81f3e BD |
1606 | static struct spi_driver ks8851_driver = { |
1607 | .driver = { | |
1608 | .name = "ks8851", | |
f4c6e06d | 1609 | .of_match_table = ks8851_match_table, |
8ac2b3c0 | 1610 | .pm = &ks8851_pm_ops, |
3ba81f3e BD |
1611 | }, |
1612 | .probe = ks8851_probe, | |
654b8c5c | 1613 | .remove = ks8851_remove, |
3ba81f3e | 1614 | }; |
0582ce92 | 1615 | module_spi_driver(ks8851_driver); |
3ba81f3e BD |
1616 | |
1617 | MODULE_DESCRIPTION("KS8851 Network driver"); | |
1618 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
1619 | MODULE_LICENSE("GPL"); | |
1620 | ||
1621 | module_param_named(message, msg_enable, int, 0); | |
1622 | MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); | |
e0626e38 | 1623 | MODULE_ALIAS("spi:ks8851"); |