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3320eae5 | 1 | /* drivers/net/ks8851.c |
3ba81f3e BD |
2 | * |
3 | * Copyright 2009 Simtec Electronics | |
4 | * http://www.simtec.co.uk/ | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
0dc7d2b3 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
3ba81f3e BD |
14 | #define DEBUG |
15 | ||
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> | |
25 | ||
26 | #include <linux/spi/spi.h> | |
27 | ||
28 | #include "ks8851.h" | |
29 | ||
30 | /** | |
31 | * struct ks8851_rxctrl - KS8851 driver rx control | |
32 | * @mchash: Multicast hash-table data. | |
33 | * @rxcr1: KS_RXCR1 register setting | |
34 | * @rxcr2: KS_RXCR2 register setting | |
35 | * | |
36 | * Representation of the settings needs to control the receive filtering | |
37 | * such as the multicast hash-filter and the receive register settings. This | |
38 | * is used to make the job of working out if the receive settings change and | |
39 | * then issuing the new settings to the worker that will send the necessary | |
40 | * commands. | |
41 | */ | |
42 | struct ks8851_rxctrl { | |
43 | u16 mchash[4]; | |
44 | u16 rxcr1; | |
45 | u16 rxcr2; | |
46 | }; | |
47 | ||
48 | /** | |
49 | * union ks8851_tx_hdr - tx header data | |
50 | * @txb: The header as bytes | |
51 | * @txw: The header as 16bit, little-endian words | |
52 | * | |
53 | * A dual representation of the tx header data to allow | |
54 | * access to individual bytes, and to allow 16bit accesses | |
55 | * with 16bit alignment. | |
56 | */ | |
57 | union ks8851_tx_hdr { | |
58 | u8 txb[6]; | |
59 | __le16 txw[3]; | |
60 | }; | |
61 | ||
62 | /** | |
63 | * struct ks8851_net - KS8851 driver private data | |
64 | * @netdev: The network device we're bound to | |
65 | * @spidev: The spi device we're bound to. | |
66 | * @lock: Lock to ensure that the device is not accessed when busy. | |
67 | * @statelock: Lock on this structure for tx list. | |
68 | * @mii: The MII state information for the mii calls. | |
69 | * @rxctrl: RX settings for @rxctrl_work. | |
70 | * @tx_work: Work queue for tx packets | |
71 | * @irq_work: Work queue for servicing interrupts | |
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 |
3ba81f3e BD |
85 | * |
86 | * The @lock ensures that the chip is protected when certain operations are | |
87 | * in progress. When the read or write packet transfer is in progress, most | |
88 | * of the chip registers are not ccessible until the transfer is finished and | |
89 | * the DMA has been de-asserted. | |
90 | * | |
91 | * The @statelock is used to protect information in the structure which may | |
92 | * need to be accessed via several sources, such as the network driver layer | |
93 | * or one of the work queues. | |
94 | * | |
95 | * We align the buffers we may use for rx/tx to ensure that if the SPI driver | |
96 | * wants to DMA map them, it will not have any problems with data the driver | |
97 | * modifies. | |
98 | */ | |
99 | struct ks8851_net { | |
100 | struct net_device *netdev; | |
101 | struct spi_device *spidev; | |
102 | struct mutex lock; | |
103 | spinlock_t statelock; | |
104 | ||
105 | union ks8851_tx_hdr txh ____cacheline_aligned; | |
106 | u8 rxd[8]; | |
107 | u8 txd[8]; | |
108 | ||
109 | u32 msg_enable ____cacheline_aligned; | |
110 | u16 tx_space; | |
111 | u8 fid; | |
112 | ||
113 | u16 rc_ier; | |
114 | u16 rc_rxqcr; | |
7d997466 SJ |
115 | u16 rc_ccr; |
116 | u16 eeprom_size; | |
3ba81f3e BD |
117 | |
118 | struct mii_if_info mii; | |
119 | struct ks8851_rxctrl rxctrl; | |
120 | ||
121 | struct work_struct tx_work; | |
122 | struct work_struct irq_work; | |
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]; | |
131 | }; | |
132 | ||
133 | static int msg_enable; | |
134 | ||
3ba81f3e BD |
135 | /* shift for byte-enable data */ |
136 | #define BYTE_EN(_x) ((_x) << 2) | |
137 | ||
138 | /* turn register number and byte-enable mask into data for start of packet */ | |
139 | #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) | |
140 | ||
141 | /* SPI register read/write calls. | |
142 | * | |
143 | * All these calls issue SPI transactions to access the chip's registers. They | |
144 | * all require that the necessary lock is held to prevent accesses when the | |
25985edc | 145 | * chip is busy transferring packet data (RX/TX FIFO accesses). |
3ba81f3e BD |
146 | */ |
147 | ||
148 | /** | |
149 | * ks8851_wrreg16 - write 16bit register value to chip | |
150 | * @ks: The chip state | |
151 | * @reg: The register address | |
152 | * @val: The value to write | |
153 | * | |
154 | * Issue a write to put the value @val into the register specified in @reg. | |
155 | */ | |
156 | static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) | |
157 | { | |
158 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
159 | struct spi_message *msg = &ks->spi_msg1; | |
160 | __le16 txb[2]; | |
161 | int ret; | |
162 | ||
163 | txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); | |
164 | txb[1] = cpu_to_le16(val); | |
165 | ||
166 | xfer->tx_buf = txb; | |
167 | xfer->rx_buf = NULL; | |
168 | xfer->len = 4; | |
169 | ||
170 | ret = spi_sync(ks->spidev, msg); | |
171 | if (ret < 0) | |
0dc7d2b3 | 172 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
3ba81f3e BD |
173 | } |
174 | ||
160d0fad BD |
175 | /** |
176 | * ks8851_wrreg8 - write 8bit register value to chip | |
177 | * @ks: The chip state | |
178 | * @reg: The register address | |
179 | * @val: The value to write | |
180 | * | |
181 | * Issue a write to put the value @val into the register specified in @reg. | |
182 | */ | |
183 | static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) | |
184 | { | |
185 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
186 | struct spi_message *msg = &ks->spi_msg1; | |
187 | __le16 txb[2]; | |
188 | int ret; | |
189 | int bit; | |
190 | ||
191 | bit = 1 << (reg & 3); | |
192 | ||
193 | txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); | |
194 | txb[1] = val; | |
195 | ||
196 | xfer->tx_buf = txb; | |
197 | xfer->rx_buf = NULL; | |
198 | xfer->len = 3; | |
199 | ||
200 | ret = spi_sync(ks->spidev, msg); | |
201 | if (ret < 0) | |
0dc7d2b3 | 202 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
160d0fad BD |
203 | } |
204 | ||
3ba81f3e BD |
205 | /** |
206 | * ks8851_rx_1msg - select whether to use one or two messages for spi read | |
207 | * @ks: The device structure | |
208 | * | |
209 | * Return whether to generate a single message with a tx and rx buffer | |
210 | * supplied to spi_sync(), or alternatively send the tx and rx buffers | |
211 | * as separate messages. | |
212 | * | |
213 | * Depending on the hardware in use, a single message may be more efficient | |
214 | * on interrupts or work done by the driver. | |
215 | * | |
216 | * This currently always returns true until we add some per-device data passed | |
217 | * from the platform code to specify which mode is better. | |
218 | */ | |
219 | static inline bool ks8851_rx_1msg(struct ks8851_net *ks) | |
220 | { | |
221 | return true; | |
222 | } | |
223 | ||
224 | /** | |
225 | * ks8851_rdreg - issue read register command and return the data | |
226 | * @ks: The device state | |
227 | * @op: The register address and byte enables in message format. | |
228 | * @rxb: The RX buffer to return the result into | |
229 | * @rxl: The length of data expected. | |
230 | * | |
231 | * This is the low level read call that issues the necessary spi message(s) | |
232 | * to read data from the register specified in @op. | |
233 | */ | |
234 | static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, | |
235 | u8 *rxb, unsigned rxl) | |
236 | { | |
237 | struct spi_transfer *xfer; | |
238 | struct spi_message *msg; | |
239 | __le16 *txb = (__le16 *)ks->txd; | |
240 | u8 *trx = ks->rxd; | |
241 | int ret; | |
242 | ||
243 | txb[0] = cpu_to_le16(op | KS_SPIOP_RD); | |
244 | ||
245 | if (ks8851_rx_1msg(ks)) { | |
246 | msg = &ks->spi_msg1; | |
247 | xfer = &ks->spi_xfer1; | |
248 | ||
249 | xfer->tx_buf = txb; | |
250 | xfer->rx_buf = trx; | |
251 | xfer->len = rxl + 2; | |
252 | } else { | |
253 | msg = &ks->spi_msg2; | |
254 | xfer = ks->spi_xfer2; | |
255 | ||
256 | xfer->tx_buf = txb; | |
257 | xfer->rx_buf = NULL; | |
258 | xfer->len = 2; | |
259 | ||
260 | xfer++; | |
261 | xfer->tx_buf = NULL; | |
262 | xfer->rx_buf = trx; | |
263 | xfer->len = rxl; | |
264 | } | |
265 | ||
266 | ret = spi_sync(ks->spidev, msg); | |
267 | if (ret < 0) | |
0dc7d2b3 | 268 | netdev_err(ks->netdev, "read: spi_sync() failed\n"); |
3ba81f3e BD |
269 | else if (ks8851_rx_1msg(ks)) |
270 | memcpy(rxb, trx + 2, rxl); | |
271 | else | |
272 | memcpy(rxb, trx, rxl); | |
273 | } | |
274 | ||
275 | /** | |
276 | * ks8851_rdreg8 - read 8 bit register from device | |
277 | * @ks: The chip information | |
278 | * @reg: The register address | |
279 | * | |
280 | * Read a 8bit register from the chip, returning the result | |
281 | */ | |
282 | static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) | |
283 | { | |
284 | u8 rxb[1]; | |
285 | ||
286 | ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); | |
287 | return rxb[0]; | |
288 | } | |
289 | ||
290 | /** | |
291 | * ks8851_rdreg16 - read 16 bit register from device | |
292 | * @ks: The chip information | |
293 | * @reg: The register address | |
294 | * | |
295 | * Read a 16bit register from the chip, returning the result | |
296 | */ | |
297 | static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) | |
298 | { | |
299 | __le16 rx = 0; | |
300 | ||
301 | ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); | |
302 | return le16_to_cpu(rx); | |
303 | } | |
304 | ||
305 | /** | |
306 | * ks8851_rdreg32 - read 32 bit register from device | |
307 | * @ks: The chip information | |
308 | * @reg: The register address | |
309 | * | |
310 | * Read a 32bit register from the chip. | |
311 | * | |
312 | * Note, this read requires the address be aligned to 4 bytes. | |
313 | */ | |
314 | static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) | |
315 | { | |
316 | __le32 rx = 0; | |
317 | ||
318 | WARN_ON(reg & 3); | |
319 | ||
320 | ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); | |
321 | return le32_to_cpu(rx); | |
322 | } | |
323 | ||
324 | /** | |
325 | * ks8851_soft_reset - issue one of the soft reset to the device | |
326 | * @ks: The device state. | |
327 | * @op: The bit(s) to set in the GRR | |
328 | * | |
329 | * Issue the relevant soft-reset command to the device's GRR register | |
330 | * specified by @op. | |
331 | * | |
332 | * Note, the delays are in there as a caution to ensure that the reset | |
333 | * has time to take effect and then complete. Since the datasheet does | |
334 | * not currently specify the exact sequence, we have chosen something | |
335 | * that seems to work with our device. | |
336 | */ | |
337 | static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) | |
338 | { | |
339 | ks8851_wrreg16(ks, KS_GRR, op); | |
340 | mdelay(1); /* wait a short time to effect reset */ | |
341 | ks8851_wrreg16(ks, KS_GRR, 0); | |
342 | mdelay(1); /* wait for condition to clear */ | |
343 | } | |
344 | ||
345 | /** | |
346 | * ks8851_write_mac_addr - write mac address to device registers | |
347 | * @dev: The network device | |
348 | * | |
349 | * Update the KS8851 MAC address registers from the address in @dev. | |
350 | * | |
351 | * This call assumes that the chip is not running, so there is no need to | |
352 | * shutdown the RXQ process whilst setting this. | |
353 | */ | |
354 | static int ks8851_write_mac_addr(struct net_device *dev) | |
355 | { | |
356 | struct ks8851_net *ks = netdev_priv(dev); | |
160d0fad | 357 | int i; |
3ba81f3e BD |
358 | |
359 | mutex_lock(&ks->lock); | |
360 | ||
160d0fad BD |
361 | for (i = 0; i < ETH_ALEN; i++) |
362 | ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); | |
3ba81f3e BD |
363 | |
364 | mutex_unlock(&ks->lock); | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | /** | |
370 | * ks8851_init_mac - initialise the mac address | |
371 | * @ks: The device structure | |
372 | * | |
373 | * Get or create the initial mac address for the device and then set that | |
374 | * into the station address register. Currently we assume that the device | |
375 | * does not have a valid mac address in it, and so we use random_ether_addr() | |
376 | * to create a new one. | |
377 | * | |
378 | * In future, the driver should check to see if the device has an EEPROM | |
379 | * attached and whether that has a valid ethernet address in it. | |
380 | */ | |
381 | static void ks8851_init_mac(struct ks8851_net *ks) | |
382 | { | |
383 | struct net_device *dev = ks->netdev; | |
384 | ||
385 | random_ether_addr(dev->dev_addr); | |
386 | ks8851_write_mac_addr(dev); | |
387 | } | |
388 | ||
389 | /** | |
390 | * ks8851_irq - device interrupt handler | |
391 | * @irq: Interrupt number passed from the IRQ hnalder. | |
392 | * @pw: The private word passed to register_irq(), our struct ks8851_net. | |
393 | * | |
394 | * Disable the interrupt from happening again until we've processed the | |
395 | * current status by scheduling ks8851_irq_work(). | |
396 | */ | |
397 | static irqreturn_t ks8851_irq(int irq, void *pw) | |
398 | { | |
399 | struct ks8851_net *ks = pw; | |
400 | ||
401 | disable_irq_nosync(irq); | |
402 | schedule_work(&ks->irq_work); | |
403 | return IRQ_HANDLED; | |
404 | } | |
405 | ||
406 | /** | |
407 | * ks8851_rdfifo - read data from the receive fifo | |
408 | * @ks: The device state. | |
409 | * @buff: The buffer address | |
410 | * @len: The length of the data to read | |
411 | * | |
9ddc5b6f | 412 | * Issue an RXQ FIFO read command and read the @len amount of data from |
3ba81f3e BD |
413 | * the FIFO into the buffer specified by @buff. |
414 | */ | |
415 | static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) | |
416 | { | |
417 | struct spi_transfer *xfer = ks->spi_xfer2; | |
418 | struct spi_message *msg = &ks->spi_msg2; | |
419 | u8 txb[1]; | |
420 | int ret; | |
421 | ||
0dc7d2b3 JP |
422 | netif_dbg(ks, rx_status, ks->netdev, |
423 | "%s: %d@%p\n", __func__, len, buff); | |
3ba81f3e BD |
424 | |
425 | /* set the operation we're issuing */ | |
426 | txb[0] = KS_SPIOP_RXFIFO; | |
427 | ||
428 | xfer->tx_buf = txb; | |
429 | xfer->rx_buf = NULL; | |
430 | xfer->len = 1; | |
431 | ||
432 | xfer++; | |
433 | xfer->rx_buf = buff; | |
434 | xfer->tx_buf = NULL; | |
435 | xfer->len = len; | |
436 | ||
437 | ret = spi_sync(ks->spidev, msg); | |
438 | if (ret < 0) | |
0dc7d2b3 | 439 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
440 | } |
441 | ||
442 | /** | |
443 | * ks8851_dbg_dumpkkt - dump initial packet contents to debug | |
444 | * @ks: The device state | |
445 | * @rxpkt: The data for the received packet | |
446 | * | |
447 | * Dump the initial data from the packet to dev_dbg(). | |
448 | */ | |
449 | static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) | |
450 | { | |
0dc7d2b3 JP |
451 | netdev_dbg(ks->netdev, |
452 | "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", | |
453 | rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], | |
454 | rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], | |
455 | rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); | |
3ba81f3e BD |
456 | } |
457 | ||
458 | /** | |
459 | * ks8851_rx_pkts - receive packets from the host | |
460 | * @ks: The device information. | |
461 | * | |
462 | * This is called from the IRQ work queue when the system detects that there | |
463 | * are packets in the receive queue. Find out how many packets there are and | |
464 | * read them from the FIFO. | |
465 | */ | |
466 | static void ks8851_rx_pkts(struct ks8851_net *ks) | |
467 | { | |
468 | struct sk_buff *skb; | |
469 | unsigned rxfc; | |
470 | unsigned rxlen; | |
471 | unsigned rxstat; | |
472 | u32 rxh; | |
473 | u8 *rxpkt; | |
474 | ||
475 | rxfc = ks8851_rdreg8(ks, KS_RXFC); | |
476 | ||
0dc7d2b3 JP |
477 | netif_dbg(ks, rx_status, ks->netdev, |
478 | "%s: %d packets\n", __func__, rxfc); | |
3ba81f3e BD |
479 | |
480 | /* Currently we're issuing a read per packet, but we could possibly | |
481 | * improve the code by issuing a single read, getting the receive | |
482 | * header, allocating the packet and then reading the packet data | |
483 | * out in one go. | |
484 | * | |
485 | * This form of operation would require us to hold the SPI bus' | |
486 | * chipselect low during the entie transaction to avoid any | |
25985edc | 487 | * reset to the data stream coming from the chip. |
3ba81f3e BD |
488 | */ |
489 | ||
490 | for (; rxfc != 0; rxfc--) { | |
491 | rxh = ks8851_rdreg32(ks, KS_RXFHSR); | |
492 | rxstat = rxh & 0xffff; | |
493 | rxlen = rxh >> 16; | |
494 | ||
0dc7d2b3 JP |
495 | netif_dbg(ks, rx_status, ks->netdev, |
496 | "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); | |
3ba81f3e BD |
497 | |
498 | /* the length of the packet includes the 32bit CRC */ | |
499 | ||
500 | /* set dma read address */ | |
501 | ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); | |
502 | ||
503 | /* start the packet dma process, and set auto-dequeue rx */ | |
504 | ks8851_wrreg16(ks, KS_RXQCR, | |
505 | ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); | |
506 | ||
972c40b5 ED |
507 | if (rxlen > 4) { |
508 | unsigned int rxalign; | |
509 | ||
510 | rxlen -= 4; | |
511 | rxalign = ALIGN(rxlen, 4); | |
512 | skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); | |
513 | if (skb) { | |
3ba81f3e | 514 | |
972c40b5 ED |
515 | /* 4 bytes of status header + 4 bytes of |
516 | * garbage: we put them before ethernet | |
517 | * header, so that they are copied, | |
518 | * but ignored. | |
519 | */ | |
3ba81f3e | 520 | |
972c40b5 | 521 | rxpkt = skb_put(skb, rxlen) - 8; |
3ba81f3e | 522 | |
972c40b5 | 523 | ks8851_rdfifo(ks, rxpkt, rxalign + 8); |
3ba81f3e | 524 | |
972c40b5 ED |
525 | if (netif_msg_pktdata(ks)) |
526 | ks8851_dbg_dumpkkt(ks, rxpkt); | |
3ba81f3e | 527 | |
972c40b5 ED |
528 | skb->protocol = eth_type_trans(skb, ks->netdev); |
529 | netif_rx(skb); | |
3ba81f3e | 530 | |
972c40b5 ED |
531 | ks->netdev->stats.rx_packets++; |
532 | ks->netdev->stats.rx_bytes += rxlen; | |
533 | } | |
3ba81f3e BD |
534 | } |
535 | ||
536 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
537 | } | |
538 | } | |
539 | ||
540 | /** | |
541 | * ks8851_irq_work - work queue handler for dealing with interrupt requests | |
542 | * @work: The work structure that was scheduled by schedule_work() | |
543 | * | |
544 | * This is the handler invoked when the ks8851_irq() is called to find out | |
545 | * what happened, as we cannot allow ourselves to sleep whilst waiting for | |
546 | * anything other process has the chip's lock. | |
547 | * | |
548 | * Read the interrupt status, work out what needs to be done and then clear | |
549 | * any of the interrupts that are not needed. | |
550 | */ | |
551 | static void ks8851_irq_work(struct work_struct *work) | |
552 | { | |
553 | struct ks8851_net *ks = container_of(work, struct ks8851_net, irq_work); | |
554 | unsigned status; | |
555 | unsigned handled = 0; | |
556 | ||
557 | mutex_lock(&ks->lock); | |
558 | ||
559 | status = ks8851_rdreg16(ks, KS_ISR); | |
560 | ||
0dc7d2b3 JP |
561 | netif_dbg(ks, intr, ks->netdev, |
562 | "%s: status 0x%04x\n", __func__, status); | |
3ba81f3e BD |
563 | |
564 | if (status & IRQ_LCI) { | |
565 | /* should do something about checking link status */ | |
566 | handled |= IRQ_LCI; | |
567 | } | |
568 | ||
569 | if (status & IRQ_LDI) { | |
570 | u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
571 | pmecr &= ~PMECR_WKEVT_MASK; | |
572 | ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); | |
573 | ||
574 | handled |= IRQ_LDI; | |
575 | } | |
576 | ||
577 | if (status & IRQ_RXPSI) | |
578 | handled |= IRQ_RXPSI; | |
579 | ||
580 | if (status & IRQ_TXI) { | |
581 | handled |= IRQ_TXI; | |
582 | ||
583 | /* no lock here, tx queue should have been stopped */ | |
584 | ||
585 | /* update our idea of how much tx space is available to the | |
586 | * system */ | |
587 | ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); | |
588 | ||
0dc7d2b3 JP |
589 | netif_dbg(ks, intr, ks->netdev, |
590 | "%s: txspace %d\n", __func__, ks->tx_space); | |
3ba81f3e BD |
591 | } |
592 | ||
593 | if (status & IRQ_RXI) | |
594 | handled |= IRQ_RXI; | |
595 | ||
596 | if (status & IRQ_SPIBEI) { | |
597 | dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); | |
598 | handled |= IRQ_SPIBEI; | |
599 | } | |
600 | ||
601 | ks8851_wrreg16(ks, KS_ISR, handled); | |
602 | ||
603 | if (status & IRQ_RXI) { | |
604 | /* the datasheet says to disable the rx interrupt during | |
605 | * packet read-out, however we're masking the interrupt | |
606 | * from the device so do not bother masking just the RX | |
607 | * from the device. */ | |
608 | ||
609 | ks8851_rx_pkts(ks); | |
610 | } | |
611 | ||
612 | /* if something stopped the rx process, probably due to wanting | |
613 | * to change the rx settings, then do something about restarting | |
614 | * it. */ | |
615 | if (status & IRQ_RXPSI) { | |
616 | struct ks8851_rxctrl *rxc = &ks->rxctrl; | |
617 | ||
618 | /* update the multicast hash table */ | |
619 | ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); | |
620 | ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); | |
621 | ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); | |
622 | ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); | |
623 | ||
624 | ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); | |
625 | ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); | |
626 | } | |
627 | ||
628 | mutex_unlock(&ks->lock); | |
629 | ||
630 | if (status & IRQ_TXI) | |
631 | netif_wake_queue(ks->netdev); | |
632 | ||
633 | enable_irq(ks->netdev->irq); | |
634 | } | |
635 | ||
636 | /** | |
637 | * calc_txlen - calculate size of message to send packet | |
25985edc | 638 | * @len: Length of data |
3ba81f3e BD |
639 | * |
640 | * Returns the size of the TXFIFO message needed to send | |
641 | * this packet. | |
642 | */ | |
643 | static inline unsigned calc_txlen(unsigned len) | |
644 | { | |
645 | return ALIGN(len + 4, 4); | |
646 | } | |
647 | ||
648 | /** | |
649 | * ks8851_wrpkt - write packet to TX FIFO | |
650 | * @ks: The device state. | |
651 | * @txp: The sk_buff to transmit. | |
652 | * @irq: IRQ on completion of the packet. | |
653 | * | |
654 | * Send the @txp to the chip. This means creating the relevant packet header | |
655 | * specifying the length of the packet and the other information the chip | |
656 | * needs, such as IRQ on completion. Send the header and the packet data to | |
657 | * the device. | |
658 | */ | |
659 | static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) | |
660 | { | |
661 | struct spi_transfer *xfer = ks->spi_xfer2; | |
662 | struct spi_message *msg = &ks->spi_msg2; | |
663 | unsigned fid = 0; | |
664 | int ret; | |
665 | ||
0dc7d2b3 JP |
666 | netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", |
667 | __func__, txp, txp->len, txp->data, irq); | |
3ba81f3e BD |
668 | |
669 | fid = ks->fid++; | |
670 | fid &= TXFR_TXFID_MASK; | |
671 | ||
672 | if (irq) | |
673 | fid |= TXFR_TXIC; /* irq on completion */ | |
674 | ||
675 | /* start header at txb[1] to align txw entries */ | |
676 | ks->txh.txb[1] = KS_SPIOP_TXFIFO; | |
677 | ks->txh.txw[1] = cpu_to_le16(fid); | |
678 | ks->txh.txw[2] = cpu_to_le16(txp->len); | |
679 | ||
680 | xfer->tx_buf = &ks->txh.txb[1]; | |
681 | xfer->rx_buf = NULL; | |
682 | xfer->len = 5; | |
683 | ||
684 | xfer++; | |
685 | xfer->tx_buf = txp->data; | |
686 | xfer->rx_buf = NULL; | |
687 | xfer->len = ALIGN(txp->len, 4); | |
688 | ||
689 | ret = spi_sync(ks->spidev, msg); | |
690 | if (ret < 0) | |
0dc7d2b3 | 691 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
692 | } |
693 | ||
694 | /** | |
695 | * ks8851_done_tx - update and then free skbuff after transmitting | |
696 | * @ks: The device state | |
697 | * @txb: The buffer transmitted | |
698 | */ | |
699 | static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) | |
700 | { | |
701 | struct net_device *dev = ks->netdev; | |
702 | ||
703 | dev->stats.tx_bytes += txb->len; | |
704 | dev->stats.tx_packets++; | |
705 | ||
706 | dev_kfree_skb(txb); | |
707 | } | |
708 | ||
709 | /** | |
710 | * ks8851_tx_work - process tx packet(s) | |
711 | * @work: The work strucutre what was scheduled. | |
712 | * | |
713 | * This is called when a number of packets have been scheduled for | |
714 | * transmission and need to be sent to the device. | |
715 | */ | |
716 | static void ks8851_tx_work(struct work_struct *work) | |
717 | { | |
718 | struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); | |
719 | struct sk_buff *txb; | |
3320eae5 | 720 | bool last = skb_queue_empty(&ks->txq); |
3ba81f3e BD |
721 | |
722 | mutex_lock(&ks->lock); | |
723 | ||
724 | while (!last) { | |
725 | txb = skb_dequeue(&ks->txq); | |
726 | last = skb_queue_empty(&ks->txq); | |
727 | ||
761172fb AA |
728 | if (txb != NULL) { |
729 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); | |
730 | ks8851_wrpkt(ks, txb, last); | |
731 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
732 | ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); | |
3ba81f3e | 733 | |
761172fb AA |
734 | ks8851_done_tx(ks, txb); |
735 | } | |
3ba81f3e BD |
736 | } |
737 | ||
738 | mutex_unlock(&ks->lock); | |
739 | } | |
740 | ||
741 | /** | |
742 | * ks8851_set_powermode - set power mode of the device | |
743 | * @ks: The device state | |
744 | * @pwrmode: The power mode value to write to KS_PMECR. | |
745 | * | |
746 | * Change the power mode of the chip. | |
747 | */ | |
748 | static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) | |
749 | { | |
750 | unsigned pmecr; | |
751 | ||
0dc7d2b3 | 752 | netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); |
3ba81f3e BD |
753 | |
754 | pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
755 | pmecr &= ~PMECR_PM_MASK; | |
756 | pmecr |= pwrmode; | |
757 | ||
758 | ks8851_wrreg16(ks, KS_PMECR, pmecr); | |
759 | } | |
760 | ||
761 | /** | |
762 | * ks8851_net_open - open network device | |
763 | * @dev: The network device being opened. | |
764 | * | |
765 | * Called when the network device is marked active, such as a user executing | |
766 | * 'ifconfig up' on the device. | |
767 | */ | |
768 | static int ks8851_net_open(struct net_device *dev) | |
769 | { | |
770 | struct ks8851_net *ks = netdev_priv(dev); | |
771 | ||
772 | /* lock the card, even if we may not actually be doing anything | |
773 | * else at the moment */ | |
774 | mutex_lock(&ks->lock); | |
775 | ||
0dc7d2b3 | 776 | netif_dbg(ks, ifup, ks->netdev, "opening\n"); |
3ba81f3e BD |
777 | |
778 | /* bring chip out of any power saving mode it was in */ | |
779 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
780 | ||
781 | /* issue a soft reset to the RX/TX QMU to put it into a known | |
782 | * state. */ | |
783 | ks8851_soft_reset(ks, GRR_QMU); | |
784 | ||
785 | /* setup transmission parameters */ | |
786 | ||
787 | ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ | |
788 | TXCR_TXPE | /* pad to min length */ | |
789 | TXCR_TXCRC | /* add CRC */ | |
790 | TXCR_TXFCE)); /* enable flow control */ | |
791 | ||
792 | /* auto-increment tx data, reset tx pointer */ | |
793 | ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); | |
794 | ||
795 | /* setup receiver control */ | |
796 | ||
797 | ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ | |
798 | RXCR1_RXFCE | /* enable flow control */ | |
799 | RXCR1_RXBE | /* broadcast enable */ | |
800 | RXCR1_RXUE | /* unicast enable */ | |
801 | RXCR1_RXE)); /* enable rx block */ | |
802 | ||
803 | /* transfer entire frames out in one go */ | |
804 | ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); | |
805 | ||
806 | /* set receive counter timeouts */ | |
807 | ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ | |
808 | ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ | |
809 | ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ | |
810 | ||
811 | ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ | |
812 | RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ | |
813 | RXQCR_RXDTTE); /* IRQ on time exceeded */ | |
814 | ||
815 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
816 | ||
817 | /* clear then enable interrupts */ | |
818 | ||
819 | #define STD_IRQ (IRQ_LCI | /* Link Change */ \ | |
820 | IRQ_TXI | /* TX done */ \ | |
821 | IRQ_RXI | /* RX done */ \ | |
822 | IRQ_SPIBEI | /* SPI bus error */ \ | |
823 | IRQ_TXPSI | /* TX process stop */ \ | |
824 | IRQ_RXPSI) /* RX process stop */ | |
825 | ||
826 | ks->rc_ier = STD_IRQ; | |
827 | ks8851_wrreg16(ks, KS_ISR, STD_IRQ); | |
828 | ks8851_wrreg16(ks, KS_IER, STD_IRQ); | |
829 | ||
830 | netif_start_queue(ks->netdev); | |
831 | ||
0dc7d2b3 | 832 | netif_dbg(ks, ifup, ks->netdev, "network device up\n"); |
3ba81f3e BD |
833 | |
834 | mutex_unlock(&ks->lock); | |
835 | return 0; | |
836 | } | |
837 | ||
838 | /** | |
839 | * ks8851_net_stop - close network device | |
840 | * @dev: The device being closed. | |
841 | * | |
842 | * Called to close down a network device which has been active. Cancell any | |
843 | * work, shutdown the RX and TX process and then place the chip into a low | |
844 | * power state whilst it is not being used. | |
845 | */ | |
846 | static int ks8851_net_stop(struct net_device *dev) | |
847 | { | |
848 | struct ks8851_net *ks = netdev_priv(dev); | |
849 | ||
0dc7d2b3 | 850 | netif_info(ks, ifdown, dev, "shutting down\n"); |
3ba81f3e BD |
851 | |
852 | netif_stop_queue(dev); | |
853 | ||
854 | mutex_lock(&ks->lock); | |
855 | ||
856 | /* stop any outstanding work */ | |
857 | flush_work(&ks->irq_work); | |
858 | flush_work(&ks->tx_work); | |
859 | flush_work(&ks->rxctrl_work); | |
860 | ||
861 | /* turn off the IRQs and ack any outstanding */ | |
862 | ks8851_wrreg16(ks, KS_IER, 0x0000); | |
863 | ks8851_wrreg16(ks, KS_ISR, 0xffff); | |
864 | ||
865 | /* shutdown RX process */ | |
866 | ks8851_wrreg16(ks, KS_RXCR1, 0x0000); | |
867 | ||
868 | /* shutdown TX process */ | |
869 | ks8851_wrreg16(ks, KS_TXCR, 0x0000); | |
870 | ||
871 | /* set powermode to soft power down to save power */ | |
872 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
873 | ||
874 | /* ensure any queued tx buffers are dumped */ | |
875 | while (!skb_queue_empty(&ks->txq)) { | |
876 | struct sk_buff *txb = skb_dequeue(&ks->txq); | |
877 | ||
0dc7d2b3 JP |
878 | netif_dbg(ks, ifdown, ks->netdev, |
879 | "%s: freeing txb %p\n", __func__, txb); | |
3ba81f3e BD |
880 | |
881 | dev_kfree_skb(txb); | |
882 | } | |
883 | ||
884 | mutex_unlock(&ks->lock); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | /** | |
889 | * ks8851_start_xmit - transmit packet | |
890 | * @skb: The buffer to transmit | |
891 | * @dev: The device used to transmit the packet. | |
892 | * | |
893 | * Called by the network layer to transmit the @skb. Queue the packet for | |
894 | * the device and schedule the necessary work to transmit the packet when | |
895 | * it is free. | |
896 | * | |
897 | * We do this to firstly avoid sleeping with the network device locked, | |
898 | * and secondly so we can round up more than one packet to transmit which | |
899 | * means we can try and avoid generating too many transmit done interrupts. | |
900 | */ | |
61357325 SH |
901 | static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, |
902 | struct net_device *dev) | |
3ba81f3e BD |
903 | { |
904 | struct ks8851_net *ks = netdev_priv(dev); | |
905 | unsigned needed = calc_txlen(skb->len); | |
61357325 | 906 | netdev_tx_t ret = NETDEV_TX_OK; |
3ba81f3e | 907 | |
0dc7d2b3 JP |
908 | netif_dbg(ks, tx_queued, ks->netdev, |
909 | "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); | |
3ba81f3e BD |
910 | |
911 | spin_lock(&ks->statelock); | |
912 | ||
913 | if (needed > ks->tx_space) { | |
914 | netif_stop_queue(dev); | |
915 | ret = NETDEV_TX_BUSY; | |
916 | } else { | |
917 | ks->tx_space -= needed; | |
918 | skb_queue_tail(&ks->txq, skb); | |
919 | } | |
920 | ||
921 | spin_unlock(&ks->statelock); | |
922 | schedule_work(&ks->tx_work); | |
923 | ||
924 | return ret; | |
925 | } | |
926 | ||
927 | /** | |
928 | * ks8851_rxctrl_work - work handler to change rx mode | |
929 | * @work: The work structure this belongs to. | |
930 | * | |
931 | * Lock the device and issue the necessary changes to the receive mode from | |
932 | * the network device layer. This is done so that we can do this without | |
933 | * having to sleep whilst holding the network device lock. | |
934 | * | |
935 | * Since the recommendation from Micrel is that the RXQ is shutdown whilst the | |
936 | * receive parameters are programmed, we issue a write to disable the RXQ and | |
937 | * then wait for the interrupt handler to be triggered once the RXQ shutdown is | |
938 | * complete. The interrupt handler then writes the new values into the chip. | |
939 | */ | |
940 | static void ks8851_rxctrl_work(struct work_struct *work) | |
941 | { | |
942 | struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); | |
943 | ||
944 | mutex_lock(&ks->lock); | |
945 | ||
946 | /* need to shutdown RXQ before modifying filter parameters */ | |
947 | ks8851_wrreg16(ks, KS_RXCR1, 0x00); | |
948 | ||
949 | mutex_unlock(&ks->lock); | |
950 | } | |
951 | ||
952 | static void ks8851_set_rx_mode(struct net_device *dev) | |
953 | { | |
954 | struct ks8851_net *ks = netdev_priv(dev); | |
955 | struct ks8851_rxctrl rxctrl; | |
956 | ||
957 | memset(&rxctrl, 0, sizeof(rxctrl)); | |
958 | ||
959 | if (dev->flags & IFF_PROMISC) { | |
960 | /* interface to receive everything */ | |
961 | ||
962 | rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; | |
963 | } else if (dev->flags & IFF_ALLMULTI) { | |
964 | /* accept all multicast packets */ | |
965 | ||
966 | rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | | |
967 | RXCR1_RXPAFMA | RXCR1_RXMAFMA); | |
4cd24eaf | 968 | } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { |
22bedad3 | 969 | struct netdev_hw_addr *ha; |
3ba81f3e | 970 | u32 crc; |
3ba81f3e BD |
971 | |
972 | /* accept some multicast */ | |
973 | ||
22bedad3 JP |
974 | netdev_for_each_mc_addr(ha, dev) { |
975 | crc = ether_crc(ETH_ALEN, ha->addr); | |
3ba81f3e BD |
976 | crc >>= (32 - 6); /* get top six bits */ |
977 | ||
978 | rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); | |
3ba81f3e BD |
979 | } |
980 | ||
b6a71bfa | 981 | rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; |
3ba81f3e BD |
982 | } else { |
983 | /* just accept broadcast / unicast */ | |
984 | rxctrl.rxcr1 = RXCR1_RXPAFMA; | |
985 | } | |
986 | ||
987 | rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ | |
988 | RXCR1_RXBE | /* broadcast enable */ | |
989 | RXCR1_RXE | /* RX process enable */ | |
990 | RXCR1_RXFCE); /* enable flow control */ | |
991 | ||
992 | rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; | |
993 | ||
994 | /* schedule work to do the actual set of the data if needed */ | |
995 | ||
996 | spin_lock(&ks->statelock); | |
997 | ||
998 | if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { | |
999 | memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); | |
1000 | schedule_work(&ks->rxctrl_work); | |
1001 | } | |
1002 | ||
1003 | spin_unlock(&ks->statelock); | |
1004 | } | |
1005 | ||
1006 | static int ks8851_set_mac_address(struct net_device *dev, void *addr) | |
1007 | { | |
1008 | struct sockaddr *sa = addr; | |
1009 | ||
1010 | if (netif_running(dev)) | |
1011 | return -EBUSY; | |
1012 | ||
1013 | if (!is_valid_ether_addr(sa->sa_data)) | |
1014 | return -EADDRNOTAVAIL; | |
1015 | ||
1016 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); | |
1017 | return ks8851_write_mac_addr(dev); | |
1018 | } | |
1019 | ||
1020 | static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) | |
1021 | { | |
1022 | struct ks8851_net *ks = netdev_priv(dev); | |
1023 | ||
1024 | if (!netif_running(dev)) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); | |
1028 | } | |
1029 | ||
1030 | static const struct net_device_ops ks8851_netdev_ops = { | |
1031 | .ndo_open = ks8851_net_open, | |
1032 | .ndo_stop = ks8851_net_stop, | |
1033 | .ndo_do_ioctl = ks8851_net_ioctl, | |
1034 | .ndo_start_xmit = ks8851_start_xmit, | |
1035 | .ndo_set_mac_address = ks8851_set_mac_address, | |
1036 | .ndo_set_rx_mode = ks8851_set_rx_mode, | |
1037 | .ndo_change_mtu = eth_change_mtu, | |
1038 | .ndo_validate_addr = eth_validate_addr, | |
1039 | }; | |
1040 | ||
a4bdfff7 SJ |
1041 | /* Companion eeprom access */ |
1042 | ||
1043 | enum { /* EEPROM programming states */ | |
1044 | EEPROM_CONTROL, | |
1045 | EEPROM_ADDRESS, | |
1046 | EEPROM_DATA, | |
1047 | EEPROM_COMPLETE | |
1048 | }; | |
1049 | ||
1050 | /** | |
1051 | * ks8851_eeprom_read - read a 16bits word in ks8851 companion EEPROM | |
1052 | * @dev: The network device the PHY is on. | |
1053 | * @addr: EEPROM address to read | |
1054 | * | |
1055 | * eeprom_size: used to define the data coding length. Can be changed | |
1056 | * through debug-fs. | |
1057 | * | |
1058 | * Programs a read on the EEPROM using ks8851 EEPROM SW access feature. | |
1059 | * Warning: The READ feature is not supported on ks8851 revision 0. | |
1060 | * | |
1061 | * Rough programming model: | |
1062 | * - on period start: set clock high and read value on bus | |
1063 | * - on period / 2: set clock low and program value on bus | |
1064 | * - start on period / 2 | |
1065 | */ | |
1066 | unsigned int ks8851_eeprom_read(struct net_device *dev, unsigned int addr) | |
1067 | { | |
1068 | struct ks8851_net *ks = netdev_priv(dev); | |
1069 | int eepcr; | |
1070 | int ctrl = EEPROM_OP_READ; | |
1071 | int state = EEPROM_CONTROL; | |
1072 | int bit_count = EEPROM_OP_LEN - 1; | |
1073 | unsigned int data = 0; | |
1074 | int dummy; | |
1075 | unsigned int addr_len; | |
1076 | ||
1077 | addr_len = (ks->eeprom_size == 128) ? 6 : 8; | |
1078 | ||
1079 | /* start transaction: chip select high, authorize write */ | |
1080 | mutex_lock(&ks->lock); | |
1081 | eepcr = EEPCR_EESA | EEPCR_EESRWA; | |
1082 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1083 | eepcr |= EEPCR_EECS; | |
1084 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1085 | mutex_unlock(&ks->lock); | |
1086 | ||
1087 | while (state != EEPROM_COMPLETE) { | |
1088 | /* falling clock period starts... */ | |
1089 | /* set EED_IO pin for control and address */ | |
1090 | eepcr &= ~EEPCR_EEDO; | |
1091 | switch (state) { | |
1092 | case EEPROM_CONTROL: | |
1093 | eepcr |= ((ctrl >> bit_count) & 1) << 2; | |
1094 | if (bit_count-- <= 0) { | |
1095 | bit_count = addr_len - 1; | |
1096 | state = EEPROM_ADDRESS; | |
1097 | } | |
1098 | break; | |
1099 | case EEPROM_ADDRESS: | |
1100 | eepcr |= ((addr >> bit_count) & 1) << 2; | |
1101 | bit_count--; | |
1102 | break; | |
1103 | case EEPROM_DATA: | |
1104 | /* Change to receive mode */ | |
1105 | eepcr &= ~EEPCR_EESRWA; | |
1106 | break; | |
1107 | } | |
1108 | ||
1109 | /* lower clock */ | |
1110 | eepcr &= ~EEPCR_EESCK; | |
1111 | ||
1112 | mutex_lock(&ks->lock); | |
1113 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1114 | mutex_unlock(&ks->lock); | |
1115 | ||
1116 | /* waitread period / 2 */ | |
1117 | udelay(EEPROM_SK_PERIOD / 2); | |
1118 | ||
1119 | /* rising clock period starts... */ | |
1120 | ||
1121 | /* raise clock */ | |
1122 | mutex_lock(&ks->lock); | |
1123 | eepcr |= EEPCR_EESCK; | |
1124 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1125 | mutex_unlock(&ks->lock); | |
1126 | ||
1127 | /* Manage read */ | |
1128 | switch (state) { | |
1129 | case EEPROM_ADDRESS: | |
1130 | if (bit_count < 0) { | |
1131 | bit_count = EEPROM_DATA_LEN - 1; | |
1132 | state = EEPROM_DATA; | |
1133 | } | |
1134 | break; | |
1135 | case EEPROM_DATA: | |
1136 | mutex_lock(&ks->lock); | |
1137 | dummy = ks8851_rdreg16(ks, KS_EEPCR); | |
1138 | mutex_unlock(&ks->lock); | |
1139 | data |= ((dummy >> EEPCR_EESB_OFFSET) & 1) << bit_count; | |
1140 | if (bit_count-- <= 0) | |
1141 | state = EEPROM_COMPLETE; | |
1142 | break; | |
1143 | } | |
1144 | ||
1145 | /* wait period / 2 */ | |
1146 | udelay(EEPROM_SK_PERIOD / 2); | |
1147 | } | |
1148 | ||
1149 | /* close transaction */ | |
1150 | mutex_lock(&ks->lock); | |
1151 | eepcr &= ~EEPCR_EECS; | |
1152 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1153 | eepcr = 0; | |
1154 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1155 | mutex_unlock(&ks->lock); | |
1156 | ||
1157 | return data; | |
1158 | } | |
1159 | ||
1160 | /** | |
1161 | * ks8851_eeprom_write - write a 16bits word in ks8851 companion EEPROM | |
1162 | * @dev: The network device the PHY is on. | |
1163 | * @op: operand (can be WRITE, EWEN, EWDS) | |
1164 | * @addr: EEPROM address to write | |
1165 | * @data: data to write | |
1166 | * | |
1167 | * eeprom_size: used to define the data coding length. Can be changed | |
1168 | * through debug-fs. | |
1169 | * | |
1170 | * Programs a write on the EEPROM using ks8851 EEPROM SW access feature. | |
1171 | * | |
1172 | * Note that a write enable is required before writing data. | |
1173 | * | |
1174 | * Rough programming model: | |
1175 | * - on period start: set clock high | |
1176 | * - on period / 2: set clock low and program value on bus | |
1177 | * - start on period / 2 | |
1178 | */ | |
1179 | void ks8851_eeprom_write(struct net_device *dev, unsigned int op, | |
1180 | unsigned int addr, unsigned int data) | |
1181 | { | |
1182 | struct ks8851_net *ks = netdev_priv(dev); | |
1183 | int eepcr; | |
1184 | int state = EEPROM_CONTROL; | |
1185 | int bit_count = EEPROM_OP_LEN - 1; | |
1186 | unsigned int addr_len; | |
1187 | ||
1188 | addr_len = (ks->eeprom_size == 128) ? 6 : 8; | |
1189 | ||
1190 | switch (op) { | |
1191 | case EEPROM_OP_EWEN: | |
1192 | addr = 0x30; | |
1193 | break; | |
1194 | case EEPROM_OP_EWDS: | |
1195 | addr = 0; | |
1196 | break; | |
1197 | } | |
1198 | ||
1199 | /* start transaction: chip select high, authorize write */ | |
1200 | mutex_lock(&ks->lock); | |
1201 | eepcr = EEPCR_EESA | EEPCR_EESRWA; | |
1202 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1203 | eepcr |= EEPCR_EECS; | |
1204 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1205 | mutex_unlock(&ks->lock); | |
1206 | ||
1207 | while (state != EEPROM_COMPLETE) { | |
1208 | /* falling clock period starts... */ | |
1209 | /* set EED_IO pin for control and address */ | |
1210 | eepcr &= ~EEPCR_EEDO; | |
1211 | switch (state) { | |
1212 | case EEPROM_CONTROL: | |
1213 | eepcr |= ((op >> bit_count) & 1) << 2; | |
1214 | if (bit_count-- <= 0) { | |
1215 | bit_count = addr_len - 1; | |
1216 | state = EEPROM_ADDRESS; | |
1217 | } | |
1218 | break; | |
1219 | case EEPROM_ADDRESS: | |
1220 | eepcr |= ((addr >> bit_count) & 1) << 2; | |
1221 | if (bit_count-- <= 0) { | |
1222 | if (op == EEPROM_OP_WRITE) { | |
1223 | bit_count = EEPROM_DATA_LEN - 1; | |
1224 | state = EEPROM_DATA; | |
1225 | } else { | |
1226 | state = EEPROM_COMPLETE; | |
1227 | } | |
1228 | } | |
1229 | break; | |
1230 | case EEPROM_DATA: | |
1231 | eepcr |= ((data >> bit_count) & 1) << 2; | |
1232 | if (bit_count-- <= 0) | |
1233 | state = EEPROM_COMPLETE; | |
1234 | break; | |
1235 | } | |
1236 | ||
1237 | /* lower clock */ | |
1238 | eepcr &= ~EEPCR_EESCK; | |
1239 | ||
1240 | mutex_lock(&ks->lock); | |
1241 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1242 | mutex_unlock(&ks->lock); | |
1243 | ||
1244 | /* wait period / 2 */ | |
1245 | udelay(EEPROM_SK_PERIOD / 2); | |
1246 | ||
1247 | /* rising clock period starts... */ | |
1248 | ||
1249 | /* raise clock */ | |
1250 | eepcr |= EEPCR_EESCK; | |
1251 | mutex_lock(&ks->lock); | |
1252 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1253 | mutex_unlock(&ks->lock); | |
1254 | ||
1255 | /* wait period / 2 */ | |
1256 | udelay(EEPROM_SK_PERIOD / 2); | |
1257 | } | |
1258 | ||
1259 | /* close transaction */ | |
1260 | mutex_lock(&ks->lock); | |
1261 | eepcr &= ~EEPCR_EECS; | |
1262 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1263 | eepcr = 0; | |
1264 | ks8851_wrreg16(ks, KS_EEPCR, eepcr); | |
1265 | mutex_unlock(&ks->lock); | |
1266 | ||
1267 | } | |
1268 | ||
3ba81f3e BD |
1269 | /* ethtool support */ |
1270 | ||
1271 | static void ks8851_get_drvinfo(struct net_device *dev, | |
1272 | struct ethtool_drvinfo *di) | |
1273 | { | |
1274 | strlcpy(di->driver, "KS8851", sizeof(di->driver)); | |
1275 | strlcpy(di->version, "1.00", sizeof(di->version)); | |
1276 | strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); | |
1277 | } | |
1278 | ||
1279 | static u32 ks8851_get_msglevel(struct net_device *dev) | |
1280 | { | |
1281 | struct ks8851_net *ks = netdev_priv(dev); | |
1282 | return ks->msg_enable; | |
1283 | } | |
1284 | ||
1285 | static void ks8851_set_msglevel(struct net_device *dev, u32 to) | |
1286 | { | |
1287 | struct ks8851_net *ks = netdev_priv(dev); | |
1288 | ks->msg_enable = to; | |
1289 | } | |
1290 | ||
1291 | static int ks8851_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1292 | { | |
1293 | struct ks8851_net *ks = netdev_priv(dev); | |
1294 | return mii_ethtool_gset(&ks->mii, cmd); | |
1295 | } | |
1296 | ||
1297 | static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1298 | { | |
1299 | struct ks8851_net *ks = netdev_priv(dev); | |
1300 | return mii_ethtool_sset(&ks->mii, cmd); | |
1301 | } | |
1302 | ||
1303 | static u32 ks8851_get_link(struct net_device *dev) | |
1304 | { | |
1305 | struct ks8851_net *ks = netdev_priv(dev); | |
1306 | return mii_link_ok(&ks->mii); | |
1307 | } | |
1308 | ||
1309 | static int ks8851_nway_reset(struct net_device *dev) | |
1310 | { | |
1311 | struct ks8851_net *ks = netdev_priv(dev); | |
1312 | return mii_nway_restart(&ks->mii); | |
1313 | } | |
1314 | ||
a84afa40 SJ |
1315 | static int ks8851_get_eeprom_len(struct net_device *dev) |
1316 | { | |
1317 | struct ks8851_net *ks = netdev_priv(dev); | |
1318 | return ks->eeprom_size; | |
1319 | } | |
1320 | ||
1321 | static int ks8851_get_eeprom(struct net_device *dev, | |
1322 | struct ethtool_eeprom *eeprom, u8 *bytes) | |
1323 | { | |
1324 | struct ks8851_net *ks = netdev_priv(dev); | |
1325 | u16 *eeprom_buff; | |
1326 | int first_word; | |
1327 | int last_word; | |
1328 | int ret_val = 0; | |
1329 | u16 i; | |
1330 | ||
1331 | if (eeprom->len == 0) | |
1332 | return -EINVAL; | |
1333 | ||
1334 | if (eeprom->len > ks->eeprom_size) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | eeprom->magic = ks8851_rdreg16(ks, KS_CIDER); | |
1338 | ||
1339 | first_word = eeprom->offset >> 1; | |
1340 | last_word = (eeprom->offset + eeprom->len - 1) >> 1; | |
1341 | ||
1342 | eeprom_buff = kmalloc(sizeof(u16) * | |
1343 | (last_word - first_word + 1), GFP_KERNEL); | |
1344 | if (!eeprom_buff) | |
1345 | return -ENOMEM; | |
1346 | ||
1347 | for (i = 0; i < last_word - first_word + 1; i++) | |
1348 | eeprom_buff[i] = ks8851_eeprom_read(dev, first_word + 1); | |
1349 | ||
1350 | /* Device's eeprom is little-endian, word addressable */ | |
1351 | for (i = 0; i < last_word - first_word + 1; i++) | |
1352 | le16_to_cpus(&eeprom_buff[i]); | |
1353 | ||
1354 | memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); | |
1355 | kfree(eeprom_buff); | |
1356 | ||
1357 | return ret_val; | |
1358 | } | |
1359 | ||
1360 | static int ks8851_set_eeprom(struct net_device *dev, | |
1361 | struct ethtool_eeprom *eeprom, u8 *bytes) | |
1362 | { | |
1363 | struct ks8851_net *ks = netdev_priv(dev); | |
1364 | u16 *eeprom_buff; | |
1365 | void *ptr; | |
1366 | int max_len; | |
1367 | int first_word; | |
1368 | int last_word; | |
1369 | int ret_val = 0; | |
1370 | u16 i; | |
1371 | ||
1372 | if (eeprom->len == 0) | |
1373 | return -EOPNOTSUPP; | |
1374 | ||
1375 | if (eeprom->len > ks->eeprom_size) | |
1376 | return -EINVAL; | |
1377 | ||
1378 | if (eeprom->magic != ks8851_rdreg16(ks, KS_CIDER)) | |
1379 | return -EFAULT; | |
1380 | ||
1381 | first_word = eeprom->offset >> 1; | |
1382 | last_word = (eeprom->offset + eeprom->len - 1) >> 1; | |
1383 | max_len = (last_word - first_word + 1) * 2; | |
1384 | eeprom_buff = kmalloc(max_len, GFP_KERNEL); | |
1385 | if (!eeprom_buff) | |
1386 | return -ENOMEM; | |
1387 | ||
1388 | ptr = (void *)eeprom_buff; | |
1389 | ||
1390 | if (eeprom->offset & 1) { | |
1391 | /* need read/modify/write of first changed EEPROM word */ | |
1392 | /* only the second byte of the word is being modified */ | |
1393 | eeprom_buff[0] = ks8851_eeprom_read(dev, first_word); | |
1394 | ptr++; | |
1395 | } | |
1396 | if ((eeprom->offset + eeprom->len) & 1) | |
1397 | /* need read/modify/write of last changed EEPROM word */ | |
1398 | /* only the first byte of the word is being modified */ | |
1399 | eeprom_buff[last_word - first_word] = | |
1400 | ks8851_eeprom_read(dev, last_word); | |
1401 | ||
1402 | ||
1403 | /* Device's eeprom is little-endian, word addressable */ | |
1404 | le16_to_cpus(&eeprom_buff[0]); | |
1405 | le16_to_cpus(&eeprom_buff[last_word - first_word]); | |
1406 | ||
1407 | memcpy(ptr, bytes, eeprom->len); | |
1408 | ||
1409 | for (i = 0; i < last_word - first_word + 1; i++) | |
1410 | eeprom_buff[i] = cpu_to_le16(eeprom_buff[i]); | |
1411 | ||
1412 | ks8851_eeprom_write(dev, EEPROM_OP_EWEN, 0, 0); | |
1413 | ||
1414 | for (i = 0; i < last_word - first_word + 1; i++) { | |
1415 | ks8851_eeprom_write(dev, EEPROM_OP_WRITE, first_word + i, | |
1416 | eeprom_buff[i]); | |
1417 | mdelay(EEPROM_WRITE_TIME); | |
1418 | } | |
1419 | ||
1420 | ks8851_eeprom_write(dev, EEPROM_OP_EWDS, 0, 0); | |
1421 | ||
1422 | kfree(eeprom_buff); | |
1423 | return ret_val; | |
1424 | } | |
1425 | ||
3ba81f3e BD |
1426 | static const struct ethtool_ops ks8851_ethtool_ops = { |
1427 | .get_drvinfo = ks8851_get_drvinfo, | |
1428 | .get_msglevel = ks8851_get_msglevel, | |
1429 | .set_msglevel = ks8851_set_msglevel, | |
1430 | .get_settings = ks8851_get_settings, | |
1431 | .set_settings = ks8851_set_settings, | |
1432 | .get_link = ks8851_get_link, | |
1433 | .nway_reset = ks8851_nway_reset, | |
a84afa40 SJ |
1434 | .get_eeprom_len = ks8851_get_eeprom_len, |
1435 | .get_eeprom = ks8851_get_eeprom, | |
1436 | .set_eeprom = ks8851_set_eeprom, | |
3ba81f3e BD |
1437 | }; |
1438 | ||
1439 | /* MII interface controls */ | |
1440 | ||
1441 | /** | |
1442 | * ks8851_phy_reg - convert MII register into a KS8851 register | |
1443 | * @reg: MII register number. | |
1444 | * | |
1445 | * Return the KS8851 register number for the corresponding MII PHY register | |
1446 | * if possible. Return zero if the MII register has no direct mapping to the | |
1447 | * KS8851 register set. | |
1448 | */ | |
1449 | static int ks8851_phy_reg(int reg) | |
1450 | { | |
1451 | switch (reg) { | |
1452 | case MII_BMCR: | |
1453 | return KS_P1MBCR; | |
1454 | case MII_BMSR: | |
1455 | return KS_P1MBSR; | |
1456 | case MII_PHYSID1: | |
1457 | return KS_PHY1ILR; | |
1458 | case MII_PHYSID2: | |
1459 | return KS_PHY1IHR; | |
1460 | case MII_ADVERTISE: | |
1461 | return KS_P1ANAR; | |
1462 | case MII_LPA: | |
1463 | return KS_P1ANLPR; | |
1464 | } | |
1465 | ||
1466 | return 0x0; | |
1467 | } | |
1468 | ||
1469 | /** | |
1470 | * ks8851_phy_read - MII interface PHY register read. | |
1471 | * @dev: The network device the PHY is on. | |
1472 | * @phy_addr: Address of PHY (ignored as we only have one) | |
1473 | * @reg: The register to read. | |
1474 | * | |
1475 | * This call reads data from the PHY register specified in @reg. Since the | |
25985edc | 1476 | * device does not support all the MII registers, the non-existent values |
3ba81f3e BD |
1477 | * are always returned as zero. |
1478 | * | |
1479 | * We return zero for unsupported registers as the MII code does not check | |
1480 | * the value returned for any error status, and simply returns it to the | |
1481 | * caller. The mii-tool that the driver was tested with takes any -ve error | |
1482 | * as real PHY capabilities, thus displaying incorrect data to the user. | |
1483 | */ | |
1484 | static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) | |
1485 | { | |
1486 | struct ks8851_net *ks = netdev_priv(dev); | |
1487 | int ksreg; | |
1488 | int result; | |
1489 | ||
1490 | ksreg = ks8851_phy_reg(reg); | |
1491 | if (!ksreg) | |
1492 | return 0x0; /* no error return allowed, so use zero */ | |
1493 | ||
1494 | mutex_lock(&ks->lock); | |
1495 | result = ks8851_rdreg16(ks, ksreg); | |
1496 | mutex_unlock(&ks->lock); | |
1497 | ||
1498 | return result; | |
1499 | } | |
1500 | ||
1501 | static void ks8851_phy_write(struct net_device *dev, | |
1502 | int phy, int reg, int value) | |
1503 | { | |
1504 | struct ks8851_net *ks = netdev_priv(dev); | |
1505 | int ksreg; | |
1506 | ||
1507 | ksreg = ks8851_phy_reg(reg); | |
1508 | if (ksreg) { | |
1509 | mutex_lock(&ks->lock); | |
1510 | ks8851_wrreg16(ks, ksreg, value); | |
1511 | mutex_unlock(&ks->lock); | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | /** | |
1516 | * ks8851_read_selftest - read the selftest memory info. | |
1517 | * @ks: The device state | |
1518 | * | |
1519 | * Read and check the TX/RX memory selftest information. | |
1520 | */ | |
1521 | static int ks8851_read_selftest(struct ks8851_net *ks) | |
1522 | { | |
1523 | unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; | |
1524 | int ret = 0; | |
1525 | unsigned rd; | |
1526 | ||
1527 | rd = ks8851_rdreg16(ks, KS_MBIR); | |
1528 | ||
1529 | if ((rd & both_done) != both_done) { | |
0dc7d2b3 | 1530 | netdev_warn(ks->netdev, "Memory selftest not finished\n"); |
3ba81f3e BD |
1531 | return 0; |
1532 | } | |
1533 | ||
1534 | if (rd & MBIR_TXMBFA) { | |
0dc7d2b3 | 1535 | netdev_err(ks->netdev, "TX memory selftest fail\n"); |
3ba81f3e BD |
1536 | ret |= 1; |
1537 | } | |
1538 | ||
1539 | if (rd & MBIR_RXMBFA) { | |
0dc7d2b3 | 1540 | netdev_err(ks->netdev, "RX memory selftest fail\n"); |
3ba81f3e BD |
1541 | ret |= 2; |
1542 | } | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | /* driver bus management functions */ | |
1548 | ||
1d5439b9 AA |
1549 | #ifdef CONFIG_PM |
1550 | static int ks8851_suspend(struct spi_device *spi, pm_message_t state) | |
1551 | { | |
1552 | struct ks8851_net *ks = dev_get_drvdata(&spi->dev); | |
1553 | struct net_device *dev = ks->netdev; | |
1554 | ||
1555 | if (netif_running(dev)) { | |
1556 | netif_device_detach(dev); | |
1557 | ks8851_net_stop(dev); | |
1558 | } | |
1559 | ||
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | static int ks8851_resume(struct spi_device *spi) | |
1564 | { | |
1565 | struct ks8851_net *ks = dev_get_drvdata(&spi->dev); | |
1566 | struct net_device *dev = ks->netdev; | |
1567 | ||
1568 | if (netif_running(dev)) { | |
1569 | ks8851_net_open(dev); | |
1570 | netif_device_attach(dev); | |
1571 | } | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | #else | |
1576 | #define ks8851_suspend NULL | |
1577 | #define ks8851_resume NULL | |
1578 | #endif | |
1579 | ||
3ba81f3e BD |
1580 | static int __devinit ks8851_probe(struct spi_device *spi) |
1581 | { | |
1582 | struct net_device *ndev; | |
1583 | struct ks8851_net *ks; | |
1584 | int ret; | |
1585 | ||
1586 | ndev = alloc_etherdev(sizeof(struct ks8851_net)); | |
1587 | if (!ndev) { | |
1588 | dev_err(&spi->dev, "failed to alloc ethernet device\n"); | |
1589 | return -ENOMEM; | |
1590 | } | |
1591 | ||
1592 | spi->bits_per_word = 8; | |
1593 | ||
1594 | ks = netdev_priv(ndev); | |
1595 | ||
1596 | ks->netdev = ndev; | |
1597 | ks->spidev = spi; | |
1598 | ks->tx_space = 6144; | |
1599 | ||
1600 | mutex_init(&ks->lock); | |
1601 | spin_lock_init(&ks->statelock); | |
1602 | ||
1603 | INIT_WORK(&ks->tx_work, ks8851_tx_work); | |
1604 | INIT_WORK(&ks->irq_work, ks8851_irq_work); | |
1605 | INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); | |
1606 | ||
1607 | /* initialise pre-made spi transfer messages */ | |
1608 | ||
1609 | spi_message_init(&ks->spi_msg1); | |
1610 | spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); | |
1611 | ||
1612 | spi_message_init(&ks->spi_msg2); | |
1613 | spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); | |
1614 | spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); | |
1615 | ||
1616 | /* setup mii state */ | |
1617 | ks->mii.dev = ndev; | |
1618 | ks->mii.phy_id = 1, | |
1619 | ks->mii.phy_id_mask = 1; | |
1620 | ks->mii.reg_num_mask = 0xf; | |
1621 | ks->mii.mdio_read = ks8851_phy_read; | |
1622 | ks->mii.mdio_write = ks8851_phy_write; | |
1623 | ||
1624 | dev_info(&spi->dev, "message enable is %d\n", msg_enable); | |
1625 | ||
1626 | /* set the default message enable */ | |
1627 | ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | | |
1628 | NETIF_MSG_PROBE | | |
1629 | NETIF_MSG_LINK)); | |
1630 | ||
1631 | skb_queue_head_init(&ks->txq); | |
1632 | ||
1633 | SET_ETHTOOL_OPS(ndev, &ks8851_ethtool_ops); | |
1634 | SET_NETDEV_DEV(ndev, &spi->dev); | |
1635 | ||
1636 | dev_set_drvdata(&spi->dev, ks); | |
1637 | ||
1638 | ndev->if_port = IF_PORT_100BASET; | |
1639 | ndev->netdev_ops = &ks8851_netdev_ops; | |
1640 | ndev->irq = spi->irq; | |
1641 | ||
57dada68 BD |
1642 | /* issue a global soft reset to reset the device. */ |
1643 | ks8851_soft_reset(ks, GRR_GSR); | |
1644 | ||
3ba81f3e BD |
1645 | /* simple check for a valid chip being connected to the bus */ |
1646 | ||
1647 | if ((ks8851_rdreg16(ks, KS_CIDER) & ~CIDER_REV_MASK) != CIDER_ID) { | |
1648 | dev_err(&spi->dev, "failed to read device ID\n"); | |
1649 | ret = -ENODEV; | |
1650 | goto err_id; | |
1651 | } | |
1652 | ||
7d997466 SJ |
1653 | /* cache the contents of the CCR register for EEPROM, etc. */ |
1654 | ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); | |
1655 | ||
1656 | if (ks->rc_ccr & CCR_EEPROM) | |
1657 | ks->eeprom_size = 128; | |
1658 | else | |
1659 | ks->eeprom_size = 0; | |
1660 | ||
3ba81f3e BD |
1661 | ks8851_read_selftest(ks); |
1662 | ks8851_init_mac(ks); | |
1663 | ||
1664 | ret = request_irq(spi->irq, ks8851_irq, IRQF_TRIGGER_LOW, | |
1665 | ndev->name, ks); | |
1666 | if (ret < 0) { | |
1667 | dev_err(&spi->dev, "failed to get irq\n"); | |
1668 | goto err_irq; | |
1669 | } | |
1670 | ||
1671 | ret = register_netdev(ndev); | |
1672 | if (ret) { | |
1673 | dev_err(&spi->dev, "failed to register network device\n"); | |
1674 | goto err_netdev; | |
1675 | } | |
1676 | ||
0dc7d2b3 JP |
1677 | netdev_info(ndev, "revision %d, MAC %pM, IRQ %d\n", |
1678 | CIDER_REV_GET(ks8851_rdreg16(ks, KS_CIDER)), | |
1679 | ndev->dev_addr, ndev->irq); | |
3ba81f3e BD |
1680 | |
1681 | return 0; | |
1682 | ||
1683 | ||
1684 | err_netdev: | |
1685 | free_irq(ndev->irq, ndev); | |
1686 | ||
1687 | err_id: | |
1688 | err_irq: | |
1689 | free_netdev(ndev); | |
1690 | return ret; | |
1691 | } | |
1692 | ||
1693 | static int __devexit ks8851_remove(struct spi_device *spi) | |
1694 | { | |
1695 | struct ks8851_net *priv = dev_get_drvdata(&spi->dev); | |
1696 | ||
1697 | if (netif_msg_drv(priv)) | |
0dc7d2b3 | 1698 | dev_info(&spi->dev, "remove\n"); |
3ba81f3e BD |
1699 | |
1700 | unregister_netdev(priv->netdev); | |
1701 | free_irq(spi->irq, priv); | |
1702 | free_netdev(priv->netdev); | |
1703 | ||
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | static struct spi_driver ks8851_driver = { | |
1708 | .driver = { | |
1709 | .name = "ks8851", | |
1710 | .owner = THIS_MODULE, | |
1711 | }, | |
1712 | .probe = ks8851_probe, | |
1713 | .remove = __devexit_p(ks8851_remove), | |
1d5439b9 AA |
1714 | .suspend = ks8851_suspend, |
1715 | .resume = ks8851_resume, | |
3ba81f3e BD |
1716 | }; |
1717 | ||
1718 | static int __init ks8851_init(void) | |
1719 | { | |
1720 | return spi_register_driver(&ks8851_driver); | |
1721 | } | |
1722 | ||
1723 | static void __exit ks8851_exit(void) | |
1724 | { | |
1725 | spi_unregister_driver(&ks8851_driver); | |
1726 | } | |
1727 | ||
1728 | module_init(ks8851_init); | |
1729 | module_exit(ks8851_exit); | |
1730 | ||
1731 | MODULE_DESCRIPTION("KS8851 Network driver"); | |
1732 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
1733 | MODULE_LICENSE("GPL"); | |
1734 | ||
1735 | module_param_named(message, msg_enable, int, 0); | |
1736 | MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); | |
e0626e38 | 1737 | MODULE_ALIAS("spi:ks8851"); |