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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> |
3ba81f3e BD |
26 | |
27 | #include <linux/spi/spi.h> | |
28 | ||
29 | #include "ks8851.h" | |
30 | ||
31 | /** | |
32 | * struct ks8851_rxctrl - KS8851 driver rx control | |
33 | * @mchash: Multicast hash-table data. | |
34 | * @rxcr1: KS_RXCR1 register setting | |
35 | * @rxcr2: KS_RXCR2 register setting | |
36 | * | |
37 | * Representation of the settings needs to control the receive filtering | |
38 | * such as the multicast hash-filter and the receive register settings. This | |
39 | * is used to make the job of working out if the receive settings change and | |
40 | * then issuing the new settings to the worker that will send the necessary | |
41 | * commands. | |
42 | */ | |
43 | struct ks8851_rxctrl { | |
44 | u16 mchash[4]; | |
45 | u16 rxcr1; | |
46 | u16 rxcr2; | |
47 | }; | |
48 | ||
49 | /** | |
50 | * union ks8851_tx_hdr - tx header data | |
51 | * @txb: The header as bytes | |
52 | * @txw: The header as 16bit, little-endian words | |
53 | * | |
54 | * A dual representation of the tx header data to allow | |
55 | * access to individual bytes, and to allow 16bit accesses | |
56 | * with 16bit alignment. | |
57 | */ | |
58 | union ks8851_tx_hdr { | |
59 | u8 txb[6]; | |
60 | __le16 txw[3]; | |
61 | }; | |
62 | ||
63 | /** | |
64 | * struct ks8851_net - KS8851 driver private data | |
65 | * @netdev: The network device we're bound to | |
66 | * @spidev: The spi device we're bound to. | |
67 | * @lock: Lock to ensure that the device is not accessed when busy. | |
68 | * @statelock: Lock on this structure for tx list. | |
69 | * @mii: The MII state information for the mii calls. | |
70 | * @rxctrl: RX settings for @rxctrl_work. | |
71 | * @tx_work: Work queue for tx packets | |
3ba81f3e BD |
72 | * @rxctrl_work: Work queue for updating RX mode and multicast lists |
73 | * @txq: Queue of packets for transmission. | |
74 | * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. | |
75 | * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. | |
76 | * @txh: Space for generating packet TX header in DMA-able data | |
77 | * @rxd: Space for receiving SPI data, in DMA-able space. | |
78 | * @txd: Space for transmitting SPI data, in DMA-able space. | |
79 | * @msg_enable: The message flags controlling driver output (see ethtool). | |
80 | * @fid: Incrementing frame id tag. | |
81 | * @rc_ier: Cached copy of KS_IER. | |
7d997466 | 82 | * @rc_ccr: Cached copy of KS_CCR. |
3ba81f3e | 83 | * @rc_rxqcr: Cached copy of KS_RXQCR. |
7d997466 | 84 | * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom |
51b7b1c3 | 85 | * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. |
3ba81f3e BD |
86 | * |
87 | * The @lock ensures that the chip is protected when certain operations are | |
88 | * in progress. When the read or write packet transfer is in progress, most | |
89 | * of the chip registers are not ccessible until the transfer is finished and | |
90 | * the DMA has been de-asserted. | |
91 | * | |
92 | * The @statelock is used to protect information in the structure which may | |
93 | * need to be accessed via several sources, such as the network driver layer | |
94 | * or one of the work queues. | |
95 | * | |
96 | * We align the buffers we may use for rx/tx to ensure that if the SPI driver | |
97 | * wants to DMA map them, it will not have any problems with data the driver | |
98 | * modifies. | |
99 | */ | |
100 | struct ks8851_net { | |
101 | struct net_device *netdev; | |
102 | struct spi_device *spidev; | |
103 | struct mutex lock; | |
104 | spinlock_t statelock; | |
105 | ||
106 | union ks8851_tx_hdr txh ____cacheline_aligned; | |
107 | u8 rxd[8]; | |
108 | u8 txd[8]; | |
109 | ||
110 | u32 msg_enable ____cacheline_aligned; | |
111 | u16 tx_space; | |
112 | u8 fid; | |
113 | ||
114 | u16 rc_ier; | |
115 | u16 rc_rxqcr; | |
7d997466 SJ |
116 | u16 rc_ccr; |
117 | u16 eeprom_size; | |
3ba81f3e BD |
118 | |
119 | struct mii_if_info mii; | |
120 | struct ks8851_rxctrl rxctrl; | |
121 | ||
122 | struct work_struct tx_work; | |
3ba81f3e BD |
123 | struct work_struct rxctrl_work; |
124 | ||
125 | struct sk_buff_head txq; | |
126 | ||
127 | struct spi_message spi_msg1; | |
128 | struct spi_message spi_msg2; | |
129 | struct spi_transfer spi_xfer1; | |
130 | struct spi_transfer spi_xfer2[2]; | |
51b7b1c3 BD |
131 | |
132 | struct eeprom_93cx6 eeprom; | |
3ba81f3e BD |
133 | }; |
134 | ||
135 | static int msg_enable; | |
136 | ||
3ba81f3e BD |
137 | /* shift for byte-enable data */ |
138 | #define BYTE_EN(_x) ((_x) << 2) | |
139 | ||
140 | /* turn register number and byte-enable mask into data for start of packet */ | |
141 | #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) | |
142 | ||
143 | /* SPI register read/write calls. | |
144 | * | |
145 | * All these calls issue SPI transactions to access the chip's registers. They | |
146 | * all require that the necessary lock is held to prevent accesses when the | |
25985edc | 147 | * chip is busy transferring packet data (RX/TX FIFO accesses). |
3ba81f3e BD |
148 | */ |
149 | ||
150 | /** | |
151 | * ks8851_wrreg16 - write 16bit register value to chip | |
152 | * @ks: The chip state | |
153 | * @reg: The register address | |
154 | * @val: The value to write | |
155 | * | |
156 | * Issue a write to put the value @val into the register specified in @reg. | |
157 | */ | |
158 | static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) | |
159 | { | |
160 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
161 | struct spi_message *msg = &ks->spi_msg1; | |
162 | __le16 txb[2]; | |
163 | int ret; | |
164 | ||
165 | txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); | |
166 | txb[1] = cpu_to_le16(val); | |
167 | ||
168 | xfer->tx_buf = txb; | |
169 | xfer->rx_buf = NULL; | |
170 | xfer->len = 4; | |
171 | ||
172 | ret = spi_sync(ks->spidev, msg); | |
173 | if (ret < 0) | |
0dc7d2b3 | 174 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
3ba81f3e BD |
175 | } |
176 | ||
160d0fad BD |
177 | /** |
178 | * ks8851_wrreg8 - write 8bit register value to chip | |
179 | * @ks: The chip state | |
180 | * @reg: The register address | |
181 | * @val: The value to write | |
182 | * | |
183 | * Issue a write to put the value @val into the register specified in @reg. | |
184 | */ | |
185 | static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) | |
186 | { | |
187 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
188 | struct spi_message *msg = &ks->spi_msg1; | |
189 | __le16 txb[2]; | |
190 | int ret; | |
191 | int bit; | |
192 | ||
193 | bit = 1 << (reg & 3); | |
194 | ||
195 | txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); | |
196 | txb[1] = val; | |
197 | ||
198 | xfer->tx_buf = txb; | |
199 | xfer->rx_buf = NULL; | |
200 | xfer->len = 3; | |
201 | ||
202 | ret = spi_sync(ks->spidev, msg); | |
203 | if (ret < 0) | |
0dc7d2b3 | 204 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
160d0fad BD |
205 | } |
206 | ||
3ba81f3e BD |
207 | /** |
208 | * ks8851_rx_1msg - select whether to use one or two messages for spi read | |
209 | * @ks: The device structure | |
210 | * | |
211 | * Return whether to generate a single message with a tx and rx buffer | |
212 | * supplied to spi_sync(), or alternatively send the tx and rx buffers | |
213 | * as separate messages. | |
214 | * | |
215 | * Depending on the hardware in use, a single message may be more efficient | |
216 | * on interrupts or work done by the driver. | |
217 | * | |
218 | * This currently always returns true until we add some per-device data passed | |
219 | * from the platform code to specify which mode is better. | |
220 | */ | |
221 | static inline bool ks8851_rx_1msg(struct ks8851_net *ks) | |
222 | { | |
223 | return true; | |
224 | } | |
225 | ||
226 | /** | |
227 | * ks8851_rdreg - issue read register command and return the data | |
228 | * @ks: The device state | |
229 | * @op: The register address and byte enables in message format. | |
230 | * @rxb: The RX buffer to return the result into | |
231 | * @rxl: The length of data expected. | |
232 | * | |
233 | * This is the low level read call that issues the necessary spi message(s) | |
234 | * to read data from the register specified in @op. | |
235 | */ | |
236 | static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, | |
237 | u8 *rxb, unsigned rxl) | |
238 | { | |
239 | struct spi_transfer *xfer; | |
240 | struct spi_message *msg; | |
241 | __le16 *txb = (__le16 *)ks->txd; | |
242 | u8 *trx = ks->rxd; | |
243 | int ret; | |
244 | ||
245 | txb[0] = cpu_to_le16(op | KS_SPIOP_RD); | |
246 | ||
247 | if (ks8851_rx_1msg(ks)) { | |
248 | msg = &ks->spi_msg1; | |
249 | xfer = &ks->spi_xfer1; | |
250 | ||
251 | xfer->tx_buf = txb; | |
252 | xfer->rx_buf = trx; | |
253 | xfer->len = rxl + 2; | |
254 | } else { | |
255 | msg = &ks->spi_msg2; | |
256 | xfer = ks->spi_xfer2; | |
257 | ||
258 | xfer->tx_buf = txb; | |
259 | xfer->rx_buf = NULL; | |
260 | xfer->len = 2; | |
261 | ||
262 | xfer++; | |
263 | xfer->tx_buf = NULL; | |
264 | xfer->rx_buf = trx; | |
265 | xfer->len = rxl; | |
266 | } | |
267 | ||
268 | ret = spi_sync(ks->spidev, msg); | |
269 | if (ret < 0) | |
0dc7d2b3 | 270 | netdev_err(ks->netdev, "read: spi_sync() failed\n"); |
3ba81f3e BD |
271 | else if (ks8851_rx_1msg(ks)) |
272 | memcpy(rxb, trx + 2, rxl); | |
273 | else | |
274 | memcpy(rxb, trx, rxl); | |
275 | } | |
276 | ||
277 | /** | |
278 | * ks8851_rdreg8 - read 8 bit register from device | |
279 | * @ks: The chip information | |
280 | * @reg: The register address | |
281 | * | |
282 | * Read a 8bit register from the chip, returning the result | |
283 | */ | |
284 | static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) | |
285 | { | |
286 | u8 rxb[1]; | |
287 | ||
288 | ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); | |
289 | return rxb[0]; | |
290 | } | |
291 | ||
292 | /** | |
293 | * ks8851_rdreg16 - read 16 bit register from device | |
294 | * @ks: The chip information | |
295 | * @reg: The register address | |
296 | * | |
297 | * Read a 16bit register from the chip, returning the result | |
298 | */ | |
299 | static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) | |
300 | { | |
301 | __le16 rx = 0; | |
302 | ||
303 | ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); | |
304 | return le16_to_cpu(rx); | |
305 | } | |
306 | ||
307 | /** | |
308 | * ks8851_rdreg32 - read 32 bit register from device | |
309 | * @ks: The chip information | |
310 | * @reg: The register address | |
311 | * | |
312 | * Read a 32bit register from the chip. | |
313 | * | |
314 | * Note, this read requires the address be aligned to 4 bytes. | |
315 | */ | |
316 | static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) | |
317 | { | |
318 | __le32 rx = 0; | |
319 | ||
320 | WARN_ON(reg & 3); | |
321 | ||
322 | ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); | |
323 | return le32_to_cpu(rx); | |
324 | } | |
325 | ||
326 | /** | |
327 | * ks8851_soft_reset - issue one of the soft reset to the device | |
328 | * @ks: The device state. | |
329 | * @op: The bit(s) to set in the GRR | |
330 | * | |
331 | * Issue the relevant soft-reset command to the device's GRR register | |
332 | * specified by @op. | |
333 | * | |
334 | * Note, the delays are in there as a caution to ensure that the reset | |
335 | * has time to take effect and then complete. Since the datasheet does | |
336 | * not currently specify the exact sequence, we have chosen something | |
337 | * that seems to work with our device. | |
338 | */ | |
339 | static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) | |
340 | { | |
341 | ks8851_wrreg16(ks, KS_GRR, op); | |
342 | mdelay(1); /* wait a short time to effect reset */ | |
343 | ks8851_wrreg16(ks, KS_GRR, 0); | |
344 | mdelay(1); /* wait for condition to clear */ | |
345 | } | |
346 | ||
32f160d9 TH |
347 | /** |
348 | * ks8851_set_powermode - set power mode of the device | |
349 | * @ks: The device state | |
350 | * @pwrmode: The power mode value to write to KS_PMECR. | |
351 | * | |
352 | * Change the power mode of the chip. | |
353 | */ | |
354 | static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) | |
355 | { | |
356 | unsigned pmecr; | |
357 | ||
358 | netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); | |
359 | ||
360 | pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
361 | pmecr &= ~PMECR_PM_MASK; | |
362 | pmecr |= pwrmode; | |
363 | ||
364 | ks8851_wrreg16(ks, KS_PMECR, pmecr); | |
365 | } | |
366 | ||
3ba81f3e BD |
367 | /** |
368 | * ks8851_write_mac_addr - write mac address to device registers | |
369 | * @dev: The network device | |
370 | * | |
371 | * Update the KS8851 MAC address registers from the address in @dev. | |
372 | * | |
373 | * This call assumes that the chip is not running, so there is no need to | |
374 | * shutdown the RXQ process whilst setting this. | |
375 | */ | |
376 | static int ks8851_write_mac_addr(struct net_device *dev) | |
377 | { | |
378 | struct ks8851_net *ks = netdev_priv(dev); | |
160d0fad | 379 | int i; |
3ba81f3e BD |
380 | |
381 | mutex_lock(&ks->lock); | |
382 | ||
32f160d9 TH |
383 | /* |
384 | * Wake up chip in case it was powered off when stopped; otherwise, | |
385 | * the first write to the MAC address does not take effect. | |
386 | */ | |
387 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
160d0fad BD |
388 | for (i = 0; i < ETH_ALEN; i++) |
389 | ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); | |
32f160d9 TH |
390 | if (!netif_running(dev)) |
391 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
3ba81f3e BD |
392 | |
393 | mutex_unlock(&ks->lock); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
a9a8de21 BD |
398 | /** |
399 | * ks8851_read_mac_addr - read mac address from device registers | |
400 | * @dev: The network device | |
401 | * | |
402 | * Update our copy of the KS8851 MAC address from the registers of @dev. | |
403 | */ | |
404 | static void ks8851_read_mac_addr(struct net_device *dev) | |
405 | { | |
406 | struct ks8851_net *ks = netdev_priv(dev); | |
407 | int i; | |
408 | ||
409 | mutex_lock(&ks->lock); | |
410 | ||
411 | for (i = 0; i < ETH_ALEN; i++) | |
412 | dev->dev_addr[i] = ks8851_rdreg8(ks, KS_MAR(i)); | |
413 | ||
414 | mutex_unlock(&ks->lock); | |
415 | } | |
416 | ||
3ba81f3e BD |
417 | /** |
418 | * ks8851_init_mac - initialise the mac address | |
419 | * @ks: The device structure | |
420 | * | |
421 | * Get or create the initial mac address for the device and then set that | |
a9a8de21 | 422 | * into the station address register. If there is an EEPROM present, then |
7efd26d0 | 423 | * we try that. If no valid mac address is found we use eth_random_addr() |
3ba81f3e | 424 | * to create a new one. |
3ba81f3e BD |
425 | */ |
426 | static void ks8851_init_mac(struct ks8851_net *ks) | |
427 | { | |
428 | struct net_device *dev = ks->netdev; | |
429 | ||
a9a8de21 BD |
430 | /* first, try reading what we've got already */ |
431 | if (ks->rc_ccr & CCR_EEPROM) { | |
432 | ks8851_read_mac_addr(dev); | |
433 | if (is_valid_ether_addr(dev->dev_addr)) | |
434 | return; | |
435 | ||
436 | netdev_err(ks->netdev, "invalid mac address read %pM\n", | |
437 | dev->dev_addr); | |
438 | } | |
439 | ||
7ce5d222 | 440 | eth_hw_addr_random(dev); |
3ba81f3e BD |
441 | ks8851_write_mac_addr(dev); |
442 | } | |
443 | ||
3ba81f3e BD |
444 | /** |
445 | * ks8851_rdfifo - read data from the receive fifo | |
446 | * @ks: The device state. | |
447 | * @buff: The buffer address | |
448 | * @len: The length of the data to read | |
449 | * | |
9ddc5b6f | 450 | * Issue an RXQ FIFO read command and read the @len amount of data from |
3ba81f3e BD |
451 | * the FIFO into the buffer specified by @buff. |
452 | */ | |
453 | static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) | |
454 | { | |
455 | struct spi_transfer *xfer = ks->spi_xfer2; | |
456 | struct spi_message *msg = &ks->spi_msg2; | |
457 | u8 txb[1]; | |
458 | int ret; | |
459 | ||
0dc7d2b3 JP |
460 | netif_dbg(ks, rx_status, ks->netdev, |
461 | "%s: %d@%p\n", __func__, len, buff); | |
3ba81f3e BD |
462 | |
463 | /* set the operation we're issuing */ | |
464 | txb[0] = KS_SPIOP_RXFIFO; | |
465 | ||
466 | xfer->tx_buf = txb; | |
467 | xfer->rx_buf = NULL; | |
468 | xfer->len = 1; | |
469 | ||
470 | xfer++; | |
471 | xfer->rx_buf = buff; | |
472 | xfer->tx_buf = NULL; | |
473 | xfer->len = len; | |
474 | ||
475 | ret = spi_sync(ks->spidev, msg); | |
476 | if (ret < 0) | |
0dc7d2b3 | 477 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
478 | } |
479 | ||
480 | /** | |
481 | * ks8851_dbg_dumpkkt - dump initial packet contents to debug | |
482 | * @ks: The device state | |
483 | * @rxpkt: The data for the received packet | |
484 | * | |
485 | * Dump the initial data from the packet to dev_dbg(). | |
486 | */ | |
487 | static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) | |
488 | { | |
0dc7d2b3 JP |
489 | netdev_dbg(ks->netdev, |
490 | "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", | |
491 | rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], | |
492 | rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], | |
493 | rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); | |
3ba81f3e BD |
494 | } |
495 | ||
496 | /** | |
497 | * ks8851_rx_pkts - receive packets from the host | |
498 | * @ks: The device information. | |
499 | * | |
500 | * This is called from the IRQ work queue when the system detects that there | |
501 | * are packets in the receive queue. Find out how many packets there are and | |
502 | * read them from the FIFO. | |
503 | */ | |
504 | static void ks8851_rx_pkts(struct ks8851_net *ks) | |
505 | { | |
506 | struct sk_buff *skb; | |
507 | unsigned rxfc; | |
508 | unsigned rxlen; | |
509 | unsigned rxstat; | |
510 | u32 rxh; | |
511 | u8 *rxpkt; | |
512 | ||
513 | rxfc = ks8851_rdreg8(ks, KS_RXFC); | |
514 | ||
0dc7d2b3 JP |
515 | netif_dbg(ks, rx_status, ks->netdev, |
516 | "%s: %d packets\n", __func__, rxfc); | |
3ba81f3e BD |
517 | |
518 | /* Currently we're issuing a read per packet, but we could possibly | |
519 | * improve the code by issuing a single read, getting the receive | |
520 | * header, allocating the packet and then reading the packet data | |
521 | * out in one go. | |
522 | * | |
523 | * This form of operation would require us to hold the SPI bus' | |
524 | * chipselect low during the entie transaction to avoid any | |
25985edc | 525 | * reset to the data stream coming from the chip. |
3ba81f3e BD |
526 | */ |
527 | ||
528 | for (; rxfc != 0; rxfc--) { | |
529 | rxh = ks8851_rdreg32(ks, KS_RXFHSR); | |
530 | rxstat = rxh & 0xffff; | |
14bc435e | 531 | rxlen = (rxh >> 16) & 0xfff; |
3ba81f3e | 532 | |
0dc7d2b3 JP |
533 | netif_dbg(ks, rx_status, ks->netdev, |
534 | "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); | |
3ba81f3e BD |
535 | |
536 | /* the length of the packet includes the 32bit CRC */ | |
537 | ||
538 | /* set dma read address */ | |
539 | ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); | |
540 | ||
541 | /* start the packet dma process, and set auto-dequeue rx */ | |
542 | ks8851_wrreg16(ks, KS_RXQCR, | |
543 | ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); | |
544 | ||
972c40b5 ED |
545 | if (rxlen > 4) { |
546 | unsigned int rxalign; | |
547 | ||
548 | rxlen -= 4; | |
549 | rxalign = ALIGN(rxlen, 4); | |
550 | skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); | |
551 | if (skb) { | |
3ba81f3e | 552 | |
972c40b5 ED |
553 | /* 4 bytes of status header + 4 bytes of |
554 | * garbage: we put them before ethernet | |
555 | * header, so that they are copied, | |
556 | * but ignored. | |
557 | */ | |
3ba81f3e | 558 | |
972c40b5 | 559 | rxpkt = skb_put(skb, rxlen) - 8; |
3ba81f3e | 560 | |
972c40b5 | 561 | ks8851_rdfifo(ks, rxpkt, rxalign + 8); |
3ba81f3e | 562 | |
972c40b5 ED |
563 | if (netif_msg_pktdata(ks)) |
564 | ks8851_dbg_dumpkkt(ks, rxpkt); | |
3ba81f3e | 565 | |
972c40b5 | 566 | skb->protocol = eth_type_trans(skb, ks->netdev); |
fbcf88b8 | 567 | netif_rx_ni(skb); |
3ba81f3e | 568 | |
972c40b5 ED |
569 | ks->netdev->stats.rx_packets++; |
570 | ks->netdev->stats.rx_bytes += rxlen; | |
571 | } | |
3ba81f3e BD |
572 | } |
573 | ||
574 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
575 | } | |
576 | } | |
577 | ||
578 | /** | |
656a05c8 FB |
579 | * ks8851_irq - IRQ handler for dealing with interrupt requests |
580 | * @irq: IRQ number | |
581 | * @_ks: cookie | |
3ba81f3e | 582 | * |
656a05c8 FB |
583 | * This handler is invoked when the IRQ line asserts to find out what happened. |
584 | * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs | |
585 | * in thread context. | |
3ba81f3e BD |
586 | * |
587 | * Read the interrupt status, work out what needs to be done and then clear | |
588 | * any of the interrupts that are not needed. | |
589 | */ | |
656a05c8 | 590 | static irqreturn_t ks8851_irq(int irq, void *_ks) |
3ba81f3e | 591 | { |
656a05c8 | 592 | struct ks8851_net *ks = _ks; |
3ba81f3e BD |
593 | unsigned status; |
594 | unsigned handled = 0; | |
595 | ||
596 | mutex_lock(&ks->lock); | |
597 | ||
598 | status = ks8851_rdreg16(ks, KS_ISR); | |
599 | ||
0dc7d2b3 JP |
600 | netif_dbg(ks, intr, ks->netdev, |
601 | "%s: status 0x%04x\n", __func__, status); | |
3ba81f3e | 602 | |
062e55e3 | 603 | if (status & IRQ_LCI) |
3ba81f3e | 604 | handled |= IRQ_LCI; |
3ba81f3e BD |
605 | |
606 | if (status & IRQ_LDI) { | |
607 | u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
608 | pmecr &= ~PMECR_WKEVT_MASK; | |
609 | ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); | |
610 | ||
611 | handled |= IRQ_LDI; | |
612 | } | |
613 | ||
614 | if (status & IRQ_RXPSI) | |
615 | handled |= IRQ_RXPSI; | |
616 | ||
617 | if (status & IRQ_TXI) { | |
618 | handled |= IRQ_TXI; | |
619 | ||
620 | /* no lock here, tx queue should have been stopped */ | |
621 | ||
622 | /* update our idea of how much tx space is available to the | |
623 | * system */ | |
624 | ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); | |
625 | ||
0dc7d2b3 JP |
626 | netif_dbg(ks, intr, ks->netdev, |
627 | "%s: txspace %d\n", __func__, ks->tx_space); | |
3ba81f3e BD |
628 | } |
629 | ||
630 | if (status & IRQ_RXI) | |
631 | handled |= IRQ_RXI; | |
632 | ||
633 | if (status & IRQ_SPIBEI) { | |
634 | dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); | |
635 | handled |= IRQ_SPIBEI; | |
636 | } | |
637 | ||
638 | ks8851_wrreg16(ks, KS_ISR, handled); | |
639 | ||
640 | if (status & IRQ_RXI) { | |
641 | /* the datasheet says to disable the rx interrupt during | |
642 | * packet read-out, however we're masking the interrupt | |
643 | * from the device so do not bother masking just the RX | |
644 | * from the device. */ | |
645 | ||
646 | ks8851_rx_pkts(ks); | |
647 | } | |
648 | ||
649 | /* if something stopped the rx process, probably due to wanting | |
650 | * to change the rx settings, then do something about restarting | |
651 | * it. */ | |
652 | if (status & IRQ_RXPSI) { | |
653 | struct ks8851_rxctrl *rxc = &ks->rxctrl; | |
654 | ||
655 | /* update the multicast hash table */ | |
656 | ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); | |
657 | ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); | |
658 | ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); | |
659 | ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); | |
660 | ||
661 | ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); | |
662 | ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); | |
663 | } | |
664 | ||
665 | mutex_unlock(&ks->lock); | |
666 | ||
062e55e3 SB |
667 | if (status & IRQ_LCI) |
668 | mii_check_link(&ks->mii); | |
669 | ||
3ba81f3e BD |
670 | if (status & IRQ_TXI) |
671 | netif_wake_queue(ks->netdev); | |
672 | ||
656a05c8 | 673 | return IRQ_HANDLED; |
3ba81f3e BD |
674 | } |
675 | ||
676 | /** | |
677 | * calc_txlen - calculate size of message to send packet | |
25985edc | 678 | * @len: Length of data |
3ba81f3e BD |
679 | * |
680 | * Returns the size of the TXFIFO message needed to send | |
681 | * this packet. | |
682 | */ | |
683 | static inline unsigned calc_txlen(unsigned len) | |
684 | { | |
685 | return ALIGN(len + 4, 4); | |
686 | } | |
687 | ||
688 | /** | |
689 | * ks8851_wrpkt - write packet to TX FIFO | |
690 | * @ks: The device state. | |
691 | * @txp: The sk_buff to transmit. | |
692 | * @irq: IRQ on completion of the packet. | |
693 | * | |
694 | * Send the @txp to the chip. This means creating the relevant packet header | |
695 | * specifying the length of the packet and the other information the chip | |
696 | * needs, such as IRQ on completion. Send the header and the packet data to | |
697 | * the device. | |
698 | */ | |
699 | static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) | |
700 | { | |
701 | struct spi_transfer *xfer = ks->spi_xfer2; | |
702 | struct spi_message *msg = &ks->spi_msg2; | |
703 | unsigned fid = 0; | |
704 | int ret; | |
705 | ||
0dc7d2b3 JP |
706 | netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", |
707 | __func__, txp, txp->len, txp->data, irq); | |
3ba81f3e BD |
708 | |
709 | fid = ks->fid++; | |
710 | fid &= TXFR_TXFID_MASK; | |
711 | ||
712 | if (irq) | |
713 | fid |= TXFR_TXIC; /* irq on completion */ | |
714 | ||
715 | /* start header at txb[1] to align txw entries */ | |
716 | ks->txh.txb[1] = KS_SPIOP_TXFIFO; | |
717 | ks->txh.txw[1] = cpu_to_le16(fid); | |
718 | ks->txh.txw[2] = cpu_to_le16(txp->len); | |
719 | ||
720 | xfer->tx_buf = &ks->txh.txb[1]; | |
721 | xfer->rx_buf = NULL; | |
722 | xfer->len = 5; | |
723 | ||
724 | xfer++; | |
725 | xfer->tx_buf = txp->data; | |
726 | xfer->rx_buf = NULL; | |
727 | xfer->len = ALIGN(txp->len, 4); | |
728 | ||
729 | ret = spi_sync(ks->spidev, msg); | |
730 | if (ret < 0) | |
0dc7d2b3 | 731 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
732 | } |
733 | ||
734 | /** | |
735 | * ks8851_done_tx - update and then free skbuff after transmitting | |
736 | * @ks: The device state | |
737 | * @txb: The buffer transmitted | |
738 | */ | |
739 | static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) | |
740 | { | |
741 | struct net_device *dev = ks->netdev; | |
742 | ||
743 | dev->stats.tx_bytes += txb->len; | |
744 | dev->stats.tx_packets++; | |
745 | ||
746 | dev_kfree_skb(txb); | |
747 | } | |
748 | ||
749 | /** | |
750 | * ks8851_tx_work - process tx packet(s) | |
751 | * @work: The work strucutre what was scheduled. | |
752 | * | |
753 | * This is called when a number of packets have been scheduled for | |
754 | * transmission and need to be sent to the device. | |
755 | */ | |
756 | static void ks8851_tx_work(struct work_struct *work) | |
757 | { | |
758 | struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); | |
759 | struct sk_buff *txb; | |
3320eae5 | 760 | bool last = skb_queue_empty(&ks->txq); |
3ba81f3e BD |
761 | |
762 | mutex_lock(&ks->lock); | |
763 | ||
764 | while (!last) { | |
765 | txb = skb_dequeue(&ks->txq); | |
766 | last = skb_queue_empty(&ks->txq); | |
767 | ||
761172fb AA |
768 | if (txb != NULL) { |
769 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); | |
770 | ks8851_wrpkt(ks, txb, last); | |
771 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
772 | ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); | |
3ba81f3e | 773 | |
761172fb AA |
774 | ks8851_done_tx(ks, txb); |
775 | } | |
3ba81f3e BD |
776 | } |
777 | ||
778 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
779 | } |
780 | ||
781 | /** | |
782 | * ks8851_net_open - open network device | |
783 | * @dev: The network device being opened. | |
784 | * | |
785 | * Called when the network device is marked active, such as a user executing | |
786 | * 'ifconfig up' on the device. | |
787 | */ | |
788 | static int ks8851_net_open(struct net_device *dev) | |
789 | { | |
790 | struct ks8851_net *ks = netdev_priv(dev); | |
791 | ||
792 | /* lock the card, even if we may not actually be doing anything | |
793 | * else at the moment */ | |
794 | mutex_lock(&ks->lock); | |
795 | ||
0dc7d2b3 | 796 | netif_dbg(ks, ifup, ks->netdev, "opening\n"); |
3ba81f3e BD |
797 | |
798 | /* bring chip out of any power saving mode it was in */ | |
799 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
800 | ||
801 | /* issue a soft reset to the RX/TX QMU to put it into a known | |
802 | * state. */ | |
803 | ks8851_soft_reset(ks, GRR_QMU); | |
804 | ||
805 | /* setup transmission parameters */ | |
806 | ||
807 | ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ | |
808 | TXCR_TXPE | /* pad to min length */ | |
809 | TXCR_TXCRC | /* add CRC */ | |
810 | TXCR_TXFCE)); /* enable flow control */ | |
811 | ||
812 | /* auto-increment tx data, reset tx pointer */ | |
813 | ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); | |
814 | ||
815 | /* setup receiver control */ | |
816 | ||
817 | ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ | |
818 | RXCR1_RXFCE | /* enable flow control */ | |
819 | RXCR1_RXBE | /* broadcast enable */ | |
820 | RXCR1_RXUE | /* unicast enable */ | |
821 | RXCR1_RXE)); /* enable rx block */ | |
822 | ||
823 | /* transfer entire frames out in one go */ | |
824 | ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); | |
825 | ||
826 | /* set receive counter timeouts */ | |
827 | ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ | |
828 | ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ | |
829 | ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ | |
830 | ||
831 | ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ | |
832 | RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ | |
833 | RXQCR_RXDTTE); /* IRQ on time exceeded */ | |
834 | ||
835 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
836 | ||
837 | /* clear then enable interrupts */ | |
838 | ||
839 | #define STD_IRQ (IRQ_LCI | /* Link Change */ \ | |
840 | IRQ_TXI | /* TX done */ \ | |
841 | IRQ_RXI | /* RX done */ \ | |
842 | IRQ_SPIBEI | /* SPI bus error */ \ | |
843 | IRQ_TXPSI | /* TX process stop */ \ | |
844 | IRQ_RXPSI) /* RX process stop */ | |
845 | ||
846 | ks->rc_ier = STD_IRQ; | |
847 | ks8851_wrreg16(ks, KS_ISR, STD_IRQ); | |
848 | ks8851_wrreg16(ks, KS_IER, STD_IRQ); | |
849 | ||
850 | netif_start_queue(ks->netdev); | |
851 | ||
0dc7d2b3 | 852 | netif_dbg(ks, ifup, ks->netdev, "network device up\n"); |
3ba81f3e BD |
853 | |
854 | mutex_unlock(&ks->lock); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | /** | |
859 | * ks8851_net_stop - close network device | |
860 | * @dev: The device being closed. | |
861 | * | |
862 | * Called to close down a network device which has been active. Cancell any | |
863 | * work, shutdown the RX and TX process and then place the chip into a low | |
864 | * power state whilst it is not being used. | |
865 | */ | |
866 | static int ks8851_net_stop(struct net_device *dev) | |
867 | { | |
868 | struct ks8851_net *ks = netdev_priv(dev); | |
869 | ||
0dc7d2b3 | 870 | netif_info(ks, ifdown, dev, "shutting down\n"); |
3ba81f3e BD |
871 | |
872 | netif_stop_queue(dev); | |
873 | ||
874 | mutex_lock(&ks->lock); | |
c5a99937 SB |
875 | /* turn off the IRQs and ack any outstanding */ |
876 | ks8851_wrreg16(ks, KS_IER, 0x0000); | |
877 | ks8851_wrreg16(ks, KS_ISR, 0xffff); | |
878 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
879 | |
880 | /* stop any outstanding work */ | |
3ba81f3e BD |
881 | flush_work(&ks->tx_work); |
882 | flush_work(&ks->rxctrl_work); | |
883 | ||
c5a99937 | 884 | mutex_lock(&ks->lock); |
3ba81f3e BD |
885 | /* shutdown RX process */ |
886 | ks8851_wrreg16(ks, KS_RXCR1, 0x0000); | |
887 | ||
888 | /* shutdown TX process */ | |
889 | ks8851_wrreg16(ks, KS_TXCR, 0x0000); | |
890 | ||
891 | /* set powermode to soft power down to save power */ | |
892 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
c5a99937 | 893 | mutex_unlock(&ks->lock); |
3ba81f3e BD |
894 | |
895 | /* ensure any queued tx buffers are dumped */ | |
896 | while (!skb_queue_empty(&ks->txq)) { | |
897 | struct sk_buff *txb = skb_dequeue(&ks->txq); | |
898 | ||
0dc7d2b3 JP |
899 | netif_dbg(ks, ifdown, ks->netdev, |
900 | "%s: freeing txb %p\n", __func__, txb); | |
3ba81f3e BD |
901 | |
902 | dev_kfree_skb(txb); | |
903 | } | |
904 | ||
3ba81f3e BD |
905 | return 0; |
906 | } | |
907 | ||
908 | /** | |
909 | * ks8851_start_xmit - transmit packet | |
910 | * @skb: The buffer to transmit | |
911 | * @dev: The device used to transmit the packet. | |
912 | * | |
913 | * Called by the network layer to transmit the @skb. Queue the packet for | |
914 | * the device and schedule the necessary work to transmit the packet when | |
915 | * it is free. | |
916 | * | |
917 | * We do this to firstly avoid sleeping with the network device locked, | |
918 | * and secondly so we can round up more than one packet to transmit which | |
919 | * means we can try and avoid generating too many transmit done interrupts. | |
920 | */ | |
61357325 SH |
921 | static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, |
922 | struct net_device *dev) | |
3ba81f3e BD |
923 | { |
924 | struct ks8851_net *ks = netdev_priv(dev); | |
925 | unsigned needed = calc_txlen(skb->len); | |
61357325 | 926 | netdev_tx_t ret = NETDEV_TX_OK; |
3ba81f3e | 927 | |
0dc7d2b3 JP |
928 | netif_dbg(ks, tx_queued, ks->netdev, |
929 | "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); | |
3ba81f3e BD |
930 | |
931 | spin_lock(&ks->statelock); | |
932 | ||
933 | if (needed > ks->tx_space) { | |
934 | netif_stop_queue(dev); | |
935 | ret = NETDEV_TX_BUSY; | |
936 | } else { | |
937 | ks->tx_space -= needed; | |
938 | skb_queue_tail(&ks->txq, skb); | |
939 | } | |
940 | ||
941 | spin_unlock(&ks->statelock); | |
942 | schedule_work(&ks->tx_work); | |
943 | ||
944 | return ret; | |
945 | } | |
946 | ||
947 | /** | |
948 | * ks8851_rxctrl_work - work handler to change rx mode | |
949 | * @work: The work structure this belongs to. | |
950 | * | |
951 | * Lock the device and issue the necessary changes to the receive mode from | |
952 | * the network device layer. This is done so that we can do this without | |
953 | * having to sleep whilst holding the network device lock. | |
954 | * | |
955 | * Since the recommendation from Micrel is that the RXQ is shutdown whilst the | |
956 | * receive parameters are programmed, we issue a write to disable the RXQ and | |
957 | * then wait for the interrupt handler to be triggered once the RXQ shutdown is | |
958 | * complete. The interrupt handler then writes the new values into the chip. | |
959 | */ | |
960 | static void ks8851_rxctrl_work(struct work_struct *work) | |
961 | { | |
962 | struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); | |
963 | ||
964 | mutex_lock(&ks->lock); | |
965 | ||
966 | /* need to shutdown RXQ before modifying filter parameters */ | |
967 | ks8851_wrreg16(ks, KS_RXCR1, 0x00); | |
968 | ||
969 | mutex_unlock(&ks->lock); | |
970 | } | |
971 | ||
972 | static void ks8851_set_rx_mode(struct net_device *dev) | |
973 | { | |
974 | struct ks8851_net *ks = netdev_priv(dev); | |
975 | struct ks8851_rxctrl rxctrl; | |
976 | ||
977 | memset(&rxctrl, 0, sizeof(rxctrl)); | |
978 | ||
979 | if (dev->flags & IFF_PROMISC) { | |
980 | /* interface to receive everything */ | |
981 | ||
982 | rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; | |
983 | } else if (dev->flags & IFF_ALLMULTI) { | |
984 | /* accept all multicast packets */ | |
985 | ||
986 | rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | | |
987 | RXCR1_RXPAFMA | RXCR1_RXMAFMA); | |
4cd24eaf | 988 | } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { |
22bedad3 | 989 | struct netdev_hw_addr *ha; |
3ba81f3e | 990 | u32 crc; |
3ba81f3e BD |
991 | |
992 | /* accept some multicast */ | |
993 | ||
22bedad3 JP |
994 | netdev_for_each_mc_addr(ha, dev) { |
995 | crc = ether_crc(ETH_ALEN, ha->addr); | |
3ba81f3e BD |
996 | crc >>= (32 - 6); /* get top six bits */ |
997 | ||
998 | rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); | |
3ba81f3e BD |
999 | } |
1000 | ||
b6a71bfa | 1001 | rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; |
3ba81f3e BD |
1002 | } else { |
1003 | /* just accept broadcast / unicast */ | |
1004 | rxctrl.rxcr1 = RXCR1_RXPAFMA; | |
1005 | } | |
1006 | ||
1007 | rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ | |
1008 | RXCR1_RXBE | /* broadcast enable */ | |
1009 | RXCR1_RXE | /* RX process enable */ | |
1010 | RXCR1_RXFCE); /* enable flow control */ | |
1011 | ||
1012 | rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; | |
1013 | ||
1014 | /* schedule work to do the actual set of the data if needed */ | |
1015 | ||
1016 | spin_lock(&ks->statelock); | |
1017 | ||
1018 | if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { | |
1019 | memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); | |
1020 | schedule_work(&ks->rxctrl_work); | |
1021 | } | |
1022 | ||
1023 | spin_unlock(&ks->statelock); | |
1024 | } | |
1025 | ||
1026 | static int ks8851_set_mac_address(struct net_device *dev, void *addr) | |
1027 | { | |
1028 | struct sockaddr *sa = addr; | |
1029 | ||
1030 | if (netif_running(dev)) | |
1031 | return -EBUSY; | |
1032 | ||
1033 | if (!is_valid_ether_addr(sa->sa_data)) | |
1034 | return -EADDRNOTAVAIL; | |
1035 | ||
1036 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); | |
1037 | return ks8851_write_mac_addr(dev); | |
1038 | } | |
1039 | ||
1040 | static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) | |
1041 | { | |
1042 | struct ks8851_net *ks = netdev_priv(dev); | |
1043 | ||
1044 | if (!netif_running(dev)) | |
1045 | return -EINVAL; | |
1046 | ||
1047 | return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); | |
1048 | } | |
1049 | ||
1050 | static const struct net_device_ops ks8851_netdev_ops = { | |
1051 | .ndo_open = ks8851_net_open, | |
1052 | .ndo_stop = ks8851_net_stop, | |
1053 | .ndo_do_ioctl = ks8851_net_ioctl, | |
1054 | .ndo_start_xmit = ks8851_start_xmit, | |
1055 | .ndo_set_mac_address = ks8851_set_mac_address, | |
1056 | .ndo_set_rx_mode = ks8851_set_rx_mode, | |
1057 | .ndo_change_mtu = eth_change_mtu, | |
1058 | .ndo_validate_addr = eth_validate_addr, | |
1059 | }; | |
1060 | ||
1061 | /* ethtool support */ | |
1062 | ||
1063 | static void ks8851_get_drvinfo(struct net_device *dev, | |
1064 | struct ethtool_drvinfo *di) | |
1065 | { | |
1066 | strlcpy(di->driver, "KS8851", sizeof(di->driver)); | |
1067 | strlcpy(di->version, "1.00", sizeof(di->version)); | |
1068 | strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); | |
1069 | } | |
1070 | ||
1071 | static u32 ks8851_get_msglevel(struct net_device *dev) | |
1072 | { | |
1073 | struct ks8851_net *ks = netdev_priv(dev); | |
1074 | return ks->msg_enable; | |
1075 | } | |
1076 | ||
1077 | static void ks8851_set_msglevel(struct net_device *dev, u32 to) | |
1078 | { | |
1079 | struct ks8851_net *ks = netdev_priv(dev); | |
1080 | ks->msg_enable = to; | |
1081 | } | |
1082 | ||
1083 | static int ks8851_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1084 | { | |
1085 | struct ks8851_net *ks = netdev_priv(dev); | |
1086 | return mii_ethtool_gset(&ks->mii, cmd); | |
1087 | } | |
1088 | ||
1089 | static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1090 | { | |
1091 | struct ks8851_net *ks = netdev_priv(dev); | |
1092 | return mii_ethtool_sset(&ks->mii, cmd); | |
1093 | } | |
1094 | ||
1095 | static u32 ks8851_get_link(struct net_device *dev) | |
1096 | { | |
1097 | struct ks8851_net *ks = netdev_priv(dev); | |
1098 | return mii_link_ok(&ks->mii); | |
1099 | } | |
1100 | ||
1101 | static int ks8851_nway_reset(struct net_device *dev) | |
1102 | { | |
1103 | struct ks8851_net *ks = netdev_priv(dev); | |
1104 | return mii_nway_restart(&ks->mii); | |
1105 | } | |
1106 | ||
51b7b1c3 | 1107 | /* EEPROM support */ |
a84afa40 | 1108 | |
51b7b1c3 | 1109 | static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee) |
a84afa40 | 1110 | { |
51b7b1c3 BD |
1111 | struct ks8851_net *ks = ee->data; |
1112 | unsigned val; | |
a84afa40 | 1113 | |
51b7b1c3 | 1114 | val = ks8851_rdreg16(ks, KS_EEPCR); |
a84afa40 | 1115 | |
51b7b1c3 BD |
1116 | ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0; |
1117 | ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0; | |
1118 | ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0; | |
1119 | } | |
a84afa40 | 1120 | |
51b7b1c3 BD |
1121 | static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee) |
1122 | { | |
1123 | struct ks8851_net *ks = ee->data; | |
1124 | unsigned val = EEPCR_EESA; /* default - eeprom access on */ | |
1125 | ||
1126 | if (ee->drive_data) | |
1127 | val |= EEPCR_EESRWA; | |
1128 | if (ee->reg_data_in) | |
1129 | val |= EEPCR_EEDO; | |
1130 | if (ee->reg_data_clock) | |
1131 | val |= EEPCR_EESCK; | |
1132 | if (ee->reg_chip_select) | |
1133 | val |= EEPCR_EECS; | |
1134 | ||
1135 | ks8851_wrreg16(ks, KS_EEPCR, val); | |
1136 | } | |
a84afa40 | 1137 | |
51b7b1c3 BD |
1138 | /** |
1139 | * ks8851_eeprom_claim - claim device EEPROM and activate the interface | |
1140 | * @ks: The network device state. | |
1141 | * | |
1142 | * Check for the presence of an EEPROM, and then activate software access | |
1143 | * to the device. | |
1144 | */ | |
1145 | static int ks8851_eeprom_claim(struct ks8851_net *ks) | |
1146 | { | |
1147 | if (!(ks->rc_ccr & CCR_EEPROM)) | |
1148 | return -ENOENT; | |
a84afa40 | 1149 | |
51b7b1c3 | 1150 | mutex_lock(&ks->lock); |
a84afa40 | 1151 | |
51b7b1c3 BD |
1152 | /* start with clock low, cs high */ |
1153 | ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS); | |
1154 | return 0; | |
1155 | } | |
a84afa40 | 1156 | |
51b7b1c3 BD |
1157 | /** |
1158 | * ks8851_eeprom_release - release the EEPROM interface | |
1159 | * @ks: The device state | |
1160 | * | |
1161 | * Release the software access to the device EEPROM | |
1162 | */ | |
1163 | static void ks8851_eeprom_release(struct ks8851_net *ks) | |
1164 | { | |
1165 | unsigned val = ks8851_rdreg16(ks, KS_EEPCR); | |
a84afa40 | 1166 | |
51b7b1c3 BD |
1167 | ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA); |
1168 | mutex_unlock(&ks->lock); | |
a84afa40 SJ |
1169 | } |
1170 | ||
51b7b1c3 BD |
1171 | #define KS_EEPROM_MAGIC (0x00008851) |
1172 | ||
a84afa40 | 1173 | static int ks8851_set_eeprom(struct net_device *dev, |
51b7b1c3 | 1174 | struct ethtool_eeprom *ee, u8 *data) |
a84afa40 SJ |
1175 | { |
1176 | struct ks8851_net *ks = netdev_priv(dev); | |
51b7b1c3 BD |
1177 | int offset = ee->offset; |
1178 | int len = ee->len; | |
1179 | u16 tmp; | |
1180 | ||
1181 | /* currently only support byte writing */ | |
1182 | if (len != 1) | |
a84afa40 SJ |
1183 | return -EINVAL; |
1184 | ||
51b7b1c3 BD |
1185 | if (ee->magic != KS_EEPROM_MAGIC) |
1186 | return -EINVAL; | |
a84afa40 | 1187 | |
51b7b1c3 BD |
1188 | if (ks8851_eeprom_claim(ks)) |
1189 | return -ENOENT; | |
1190 | ||
1191 | eeprom_93cx6_wren(&ks->eeprom, true); | |
1192 | ||
1193 | /* ethtool currently only supports writing bytes, which means | |
1194 | * we have to read/modify/write our 16bit EEPROMs */ | |
a84afa40 | 1195 | |
51b7b1c3 | 1196 | eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp); |
a84afa40 | 1197 | |
51b7b1c3 BD |
1198 | if (offset & 1) { |
1199 | tmp &= 0xff; | |
1200 | tmp |= *data << 8; | |
1201 | } else { | |
1202 | tmp &= 0xff00; | |
1203 | tmp |= *data; | |
a84afa40 | 1204 | } |
a84afa40 | 1205 | |
51b7b1c3 BD |
1206 | eeprom_93cx6_write(&ks->eeprom, offset/2, tmp); |
1207 | eeprom_93cx6_wren(&ks->eeprom, false); | |
1208 | ||
1209 | ks8851_eeprom_release(ks); | |
1210 | ||
1211 | return 0; | |
1212 | } | |
a84afa40 | 1213 | |
51b7b1c3 BD |
1214 | static int ks8851_get_eeprom(struct net_device *dev, |
1215 | struct ethtool_eeprom *ee, u8 *data) | |
1216 | { | |
1217 | struct ks8851_net *ks = netdev_priv(dev); | |
1218 | int offset = ee->offset; | |
1219 | int len = ee->len; | |
a84afa40 | 1220 | |
51b7b1c3 BD |
1221 | /* must be 2 byte aligned */ |
1222 | if (len & 1 || offset & 1) | |
1223 | return -EINVAL; | |
a84afa40 | 1224 | |
51b7b1c3 BD |
1225 | if (ks8851_eeprom_claim(ks)) |
1226 | return -ENOENT; | |
a84afa40 | 1227 | |
51b7b1c3 | 1228 | ee->magic = KS_EEPROM_MAGIC; |
a84afa40 | 1229 | |
51b7b1c3 BD |
1230 | eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2); |
1231 | ks8851_eeprom_release(ks); | |
a84afa40 | 1232 | |
51b7b1c3 BD |
1233 | return 0; |
1234 | } | |
a84afa40 | 1235 | |
51b7b1c3 BD |
1236 | static int ks8851_get_eeprom_len(struct net_device *dev) |
1237 | { | |
1238 | struct ks8851_net *ks = netdev_priv(dev); | |
1239 | ||
1240 | /* currently, we assume it is an 93C46 attached, so return 128 */ | |
1241 | return ks->rc_ccr & CCR_EEPROM ? 128 : 0; | |
a84afa40 SJ |
1242 | } |
1243 | ||
3ba81f3e BD |
1244 | static const struct ethtool_ops ks8851_ethtool_ops = { |
1245 | .get_drvinfo = ks8851_get_drvinfo, | |
1246 | .get_msglevel = ks8851_get_msglevel, | |
1247 | .set_msglevel = ks8851_set_msglevel, | |
1248 | .get_settings = ks8851_get_settings, | |
1249 | .set_settings = ks8851_set_settings, | |
1250 | .get_link = ks8851_get_link, | |
1251 | .nway_reset = ks8851_nway_reset, | |
a84afa40 SJ |
1252 | .get_eeprom_len = ks8851_get_eeprom_len, |
1253 | .get_eeprom = ks8851_get_eeprom, | |
1254 | .set_eeprom = ks8851_set_eeprom, | |
3ba81f3e BD |
1255 | }; |
1256 | ||
1257 | /* MII interface controls */ | |
1258 | ||
1259 | /** | |
1260 | * ks8851_phy_reg - convert MII register into a KS8851 register | |
1261 | * @reg: MII register number. | |
1262 | * | |
1263 | * Return the KS8851 register number for the corresponding MII PHY register | |
1264 | * if possible. Return zero if the MII register has no direct mapping to the | |
1265 | * KS8851 register set. | |
1266 | */ | |
1267 | static int ks8851_phy_reg(int reg) | |
1268 | { | |
1269 | switch (reg) { | |
1270 | case MII_BMCR: | |
1271 | return KS_P1MBCR; | |
1272 | case MII_BMSR: | |
1273 | return KS_P1MBSR; | |
1274 | case MII_PHYSID1: | |
1275 | return KS_PHY1ILR; | |
1276 | case MII_PHYSID2: | |
1277 | return KS_PHY1IHR; | |
1278 | case MII_ADVERTISE: | |
1279 | return KS_P1ANAR; | |
1280 | case MII_LPA: | |
1281 | return KS_P1ANLPR; | |
1282 | } | |
1283 | ||
1284 | return 0x0; | |
1285 | } | |
1286 | ||
1287 | /** | |
1288 | * ks8851_phy_read - MII interface PHY register read. | |
1289 | * @dev: The network device the PHY is on. | |
1290 | * @phy_addr: Address of PHY (ignored as we only have one) | |
1291 | * @reg: The register to read. | |
1292 | * | |
1293 | * This call reads data from the PHY register specified in @reg. Since the | |
25985edc | 1294 | * device does not support all the MII registers, the non-existent values |
3ba81f3e BD |
1295 | * are always returned as zero. |
1296 | * | |
1297 | * We return zero for unsupported registers as the MII code does not check | |
1298 | * the value returned for any error status, and simply returns it to the | |
1299 | * caller. The mii-tool that the driver was tested with takes any -ve error | |
1300 | * as real PHY capabilities, thus displaying incorrect data to the user. | |
1301 | */ | |
1302 | static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) | |
1303 | { | |
1304 | struct ks8851_net *ks = netdev_priv(dev); | |
1305 | int ksreg; | |
1306 | int result; | |
1307 | ||
1308 | ksreg = ks8851_phy_reg(reg); | |
1309 | if (!ksreg) | |
1310 | return 0x0; /* no error return allowed, so use zero */ | |
1311 | ||
1312 | mutex_lock(&ks->lock); | |
1313 | result = ks8851_rdreg16(ks, ksreg); | |
1314 | mutex_unlock(&ks->lock); | |
1315 | ||
1316 | return result; | |
1317 | } | |
1318 | ||
1319 | static void ks8851_phy_write(struct net_device *dev, | |
1320 | int phy, int reg, int value) | |
1321 | { | |
1322 | struct ks8851_net *ks = netdev_priv(dev); | |
1323 | int ksreg; | |
1324 | ||
1325 | ksreg = ks8851_phy_reg(reg); | |
1326 | if (ksreg) { | |
1327 | mutex_lock(&ks->lock); | |
1328 | ks8851_wrreg16(ks, ksreg, value); | |
1329 | mutex_unlock(&ks->lock); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | /** | |
1334 | * ks8851_read_selftest - read the selftest memory info. | |
1335 | * @ks: The device state | |
1336 | * | |
1337 | * Read and check the TX/RX memory selftest information. | |
1338 | */ | |
1339 | static int ks8851_read_selftest(struct ks8851_net *ks) | |
1340 | { | |
1341 | unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; | |
1342 | int ret = 0; | |
1343 | unsigned rd; | |
1344 | ||
1345 | rd = ks8851_rdreg16(ks, KS_MBIR); | |
1346 | ||
1347 | if ((rd & both_done) != both_done) { | |
0dc7d2b3 | 1348 | netdev_warn(ks->netdev, "Memory selftest not finished\n"); |
3ba81f3e BD |
1349 | return 0; |
1350 | } | |
1351 | ||
1352 | if (rd & MBIR_TXMBFA) { | |
0dc7d2b3 | 1353 | netdev_err(ks->netdev, "TX memory selftest fail\n"); |
3ba81f3e BD |
1354 | ret |= 1; |
1355 | } | |
1356 | ||
1357 | if (rd & MBIR_RXMBFA) { | |
0dc7d2b3 | 1358 | netdev_err(ks->netdev, "RX memory selftest fail\n"); |
3ba81f3e BD |
1359 | ret |= 2; |
1360 | } | |
1361 | ||
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | /* driver bus management functions */ | |
1366 | ||
1d5439b9 AA |
1367 | #ifdef CONFIG_PM |
1368 | static int ks8851_suspend(struct spi_device *spi, pm_message_t state) | |
1369 | { | |
1370 | struct ks8851_net *ks = dev_get_drvdata(&spi->dev); | |
1371 | struct net_device *dev = ks->netdev; | |
1372 | ||
1373 | if (netif_running(dev)) { | |
1374 | netif_device_detach(dev); | |
1375 | ks8851_net_stop(dev); | |
1376 | } | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static int ks8851_resume(struct spi_device *spi) | |
1382 | { | |
1383 | struct ks8851_net *ks = dev_get_drvdata(&spi->dev); | |
1384 | struct net_device *dev = ks->netdev; | |
1385 | ||
1386 | if (netif_running(dev)) { | |
1387 | ks8851_net_open(dev); | |
1388 | netif_device_attach(dev); | |
1389 | } | |
1390 | ||
1391 | return 0; | |
1392 | } | |
1393 | #else | |
1394 | #define ks8851_suspend NULL | |
1395 | #define ks8851_resume NULL | |
1396 | #endif | |
1397 | ||
654b8c5c | 1398 | static int ks8851_probe(struct spi_device *spi) |
3ba81f3e BD |
1399 | { |
1400 | struct net_device *ndev; | |
1401 | struct ks8851_net *ks; | |
1402 | int ret; | |
51c61a28 | 1403 | unsigned cider; |
3ba81f3e BD |
1404 | |
1405 | ndev = alloc_etherdev(sizeof(struct ks8851_net)); | |
41de8d4c | 1406 | if (!ndev) |
3ba81f3e | 1407 | return -ENOMEM; |
3ba81f3e BD |
1408 | |
1409 | spi->bits_per_word = 8; | |
1410 | ||
1411 | ks = netdev_priv(ndev); | |
1412 | ||
1413 | ks->netdev = ndev; | |
1414 | ks->spidev = spi; | |
1415 | ks->tx_space = 6144; | |
1416 | ||
1417 | mutex_init(&ks->lock); | |
1418 | spin_lock_init(&ks->statelock); | |
1419 | ||
1420 | INIT_WORK(&ks->tx_work, ks8851_tx_work); | |
3ba81f3e BD |
1421 | INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); |
1422 | ||
1423 | /* initialise pre-made spi transfer messages */ | |
1424 | ||
1425 | spi_message_init(&ks->spi_msg1); | |
1426 | spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); | |
1427 | ||
1428 | spi_message_init(&ks->spi_msg2); | |
1429 | spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); | |
1430 | spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); | |
1431 | ||
51b7b1c3 BD |
1432 | /* setup EEPROM state */ |
1433 | ||
1434 | ks->eeprom.data = ks; | |
1435 | ks->eeprom.width = PCI_EEPROM_WIDTH_93C46; | |
1436 | ks->eeprom.register_read = ks8851_eeprom_regread; | |
1437 | ks->eeprom.register_write = ks8851_eeprom_regwrite; | |
1438 | ||
3ba81f3e BD |
1439 | /* setup mii state */ |
1440 | ks->mii.dev = ndev; | |
1441 | ks->mii.phy_id = 1, | |
1442 | ks->mii.phy_id_mask = 1; | |
1443 | ks->mii.reg_num_mask = 0xf; | |
1444 | ks->mii.mdio_read = ks8851_phy_read; | |
1445 | ks->mii.mdio_write = ks8851_phy_write; | |
1446 | ||
1447 | dev_info(&spi->dev, "message enable is %d\n", msg_enable); | |
1448 | ||
1449 | /* set the default message enable */ | |
1450 | ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | | |
1451 | NETIF_MSG_PROBE | | |
1452 | NETIF_MSG_LINK)); | |
1453 | ||
1454 | skb_queue_head_init(&ks->txq); | |
1455 | ||
1456 | SET_ETHTOOL_OPS(ndev, &ks8851_ethtool_ops); | |
1457 | SET_NETDEV_DEV(ndev, &spi->dev); | |
1458 | ||
1459 | dev_set_drvdata(&spi->dev, ks); | |
1460 | ||
1461 | ndev->if_port = IF_PORT_100BASET; | |
1462 | ndev->netdev_ops = &ks8851_netdev_ops; | |
1463 | ndev->irq = spi->irq; | |
1464 | ||
57dada68 BD |
1465 | /* issue a global soft reset to reset the device. */ |
1466 | ks8851_soft_reset(ks, GRR_GSR); | |
1467 | ||
3ba81f3e | 1468 | /* simple check for a valid chip being connected to the bus */ |
51c61a28 MR |
1469 | cider = ks8851_rdreg16(ks, KS_CIDER); |
1470 | if ((cider & ~CIDER_REV_MASK) != CIDER_ID) { | |
3ba81f3e BD |
1471 | dev_err(&spi->dev, "failed to read device ID\n"); |
1472 | ret = -ENODEV; | |
1473 | goto err_id; | |
1474 | } | |
1475 | ||
7d997466 SJ |
1476 | /* cache the contents of the CCR register for EEPROM, etc. */ |
1477 | ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); | |
1478 | ||
1479 | if (ks->rc_ccr & CCR_EEPROM) | |
1480 | ks->eeprom_size = 128; | |
1481 | else | |
1482 | ks->eeprom_size = 0; | |
1483 | ||
3ba81f3e BD |
1484 | ks8851_read_selftest(ks); |
1485 | ks8851_init_mac(ks); | |
1486 | ||
656a05c8 FB |
1487 | ret = request_threaded_irq(spi->irq, NULL, ks8851_irq, |
1488 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1489 | ndev->name, ks); | |
3ba81f3e BD |
1490 | if (ret < 0) { |
1491 | dev_err(&spi->dev, "failed to get irq\n"); | |
1492 | goto err_irq; | |
1493 | } | |
1494 | ||
1495 | ret = register_netdev(ndev); | |
1496 | if (ret) { | |
1497 | dev_err(&spi->dev, "failed to register network device\n"); | |
1498 | goto err_netdev; | |
1499 | } | |
1500 | ||
a9a8de21 | 1501 | netdev_info(ndev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n", |
51c61a28 | 1502 | CIDER_REV_GET(cider), ndev->dev_addr, ndev->irq, |
a9a8de21 | 1503 | ks->rc_ccr & CCR_EEPROM ? "has" : "no"); |
3ba81f3e BD |
1504 | |
1505 | return 0; | |
1506 | ||
1507 | ||
1508 | err_netdev: | |
e8195b24 | 1509 | free_irq(ndev->irq, ks); |
3ba81f3e BD |
1510 | |
1511 | err_id: | |
1512 | err_irq: | |
1513 | free_netdev(ndev); | |
1514 | return ret; | |
1515 | } | |
1516 | ||
654b8c5c | 1517 | static int ks8851_remove(struct spi_device *spi) |
3ba81f3e BD |
1518 | { |
1519 | struct ks8851_net *priv = dev_get_drvdata(&spi->dev); | |
1520 | ||
1521 | if (netif_msg_drv(priv)) | |
0dc7d2b3 | 1522 | dev_info(&spi->dev, "remove\n"); |
3ba81f3e BD |
1523 | |
1524 | unregister_netdev(priv->netdev); | |
1525 | free_irq(spi->irq, priv); | |
1526 | free_netdev(priv->netdev); | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | static struct spi_driver ks8851_driver = { | |
1532 | .driver = { | |
1533 | .name = "ks8851", | |
1534 | .owner = THIS_MODULE, | |
1535 | }, | |
1536 | .probe = ks8851_probe, | |
654b8c5c | 1537 | .remove = ks8851_remove, |
1d5439b9 AA |
1538 | .suspend = ks8851_suspend, |
1539 | .resume = ks8851_resume, | |
3ba81f3e BD |
1540 | }; |
1541 | ||
1542 | static int __init ks8851_init(void) | |
1543 | { | |
1544 | return spi_register_driver(&ks8851_driver); | |
1545 | } | |
1546 | ||
1547 | static void __exit ks8851_exit(void) | |
1548 | { | |
1549 | spi_unregister_driver(&ks8851_driver); | |
1550 | } | |
1551 | ||
1552 | module_init(ks8851_init); | |
1553 | module_exit(ks8851_exit); | |
1554 | ||
1555 | MODULE_DESCRIPTION("KS8851 Network driver"); | |
1556 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
1557 | MODULE_LICENSE("GPL"); | |
1558 | ||
1559 | module_param_named(message, msg_enable, int, 0); | |
1560 | MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); | |
e0626e38 | 1561 | MODULE_ALIAS("spi:ks8851"); |