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d2b21f19 CM |
1 | /* |
2 | * linux/drivers/net/wireless/libertas/if_spi.c | |
3 | * | |
4 | * Driver for Marvell SPI WLAN cards. | |
5 | * | |
6 | * Copyright 2008 Analog Devices Inc. | |
7 | * | |
8 | * Authors: | |
9 | * Andrey Yurovsky <andrey@cozybit.com> | |
10 | * Colin McCabe <colin@cozybit.com> | |
11 | * | |
12 | * Inspired by if_sdio.c, Copyright 2007-2008 Pierre Ossman | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | */ | |
19 | ||
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/firmware.h> | |
d2b21f19 CM |
22 | #include <linux/jiffies.h> |
23 | #include <linux/kthread.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/netdevice.h> | |
371ba883 | 26 | #include <linux/semaphore.h> |
d2b21f19 CM |
27 | #include <linux/spi/libertas_spi.h> |
28 | #include <linux/spi/spi.h> | |
29 | ||
30 | #include "host.h" | |
31 | #include "decl.h" | |
32 | #include "defs.h" | |
33 | #include "dev.h" | |
34 | #include "if_spi.h" | |
35 | ||
d2b21f19 CM |
36 | struct if_spi_card { |
37 | struct spi_device *spi; | |
38 | struct lbs_private *priv; | |
0c2bec96 | 39 | struct libertas_spi_platform_data *pdata; |
d2b21f19 | 40 | |
cadeba31 JL |
41 | char helper_fw_name[IF_SPI_FW_NAME_MAX]; |
42 | char main_fw_name[IF_SPI_FW_NAME_MAX]; | |
d2b21f19 CM |
43 | |
44 | /* The card ID and card revision, as reported by the hardware. */ | |
45 | u16 card_id; | |
46 | u8 card_rev; | |
47 | ||
d2b21f19 CM |
48 | /* The last time that we initiated an SPU operation */ |
49 | unsigned long prev_xfer_time; | |
50 | ||
51 | int use_dummy_writes; | |
52 | unsigned long spu_port_delay; | |
53 | unsigned long spu_reg_delay; | |
54 | ||
55 | /* Handles all SPI communication (except for FW load) */ | |
56 | struct task_struct *spi_thread; | |
57 | int run_thread; | |
58 | ||
59 | /* Used to wake up the spi_thread */ | |
60 | struct semaphore spi_ready; | |
61 | struct semaphore spi_thread_terminated; | |
62 | ||
63 | u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE]; | |
d2b21f19 CM |
64 | }; |
65 | ||
66 | static void free_if_spi_card(struct if_spi_card *card) | |
67 | { | |
d2b21f19 CM |
68 | spi_set_drvdata(card->spi, NULL); |
69 | kfree(card); | |
70 | } | |
71 | ||
72 | static struct chip_ident chip_id_to_device_name[] = { | |
73 | { .chip_id = 0x04, .name = 8385 }, | |
74 | { .chip_id = 0x0b, .name = 8686 }, | |
75 | }; | |
76 | ||
77 | /* | |
78 | * SPI Interface Unit Routines | |
79 | * | |
80 | * The SPU sits between the host and the WLAN module. | |
81 | * All communication with the firmware is through SPU transactions. | |
82 | * | |
83 | * First we have to put a SPU register name on the bus. Then we can | |
84 | * either read from or write to that register. | |
85 | * | |
d2b21f19 CM |
86 | */ |
87 | ||
88 | static void spu_transaction_init(struct if_spi_card *card) | |
89 | { | |
90 | if (!time_after(jiffies, card->prev_xfer_time + 1)) { | |
91 | /* Unfortunately, the SPU requires a delay between successive | |
92 | * transactions. If our last transaction was more than a jiffy | |
93 | * ago, we have obviously already delayed enough. | |
94 | * If not, we have to busy-wait to be on the safe side. */ | |
95 | ndelay(400); | |
96 | } | |
d2b21f19 CM |
97 | } |
98 | ||
99 | static void spu_transaction_finish(struct if_spi_card *card) | |
100 | { | |
d2b21f19 CM |
101 | card->prev_xfer_time = jiffies; |
102 | } | |
103 | ||
104 | /* Write out a byte buffer to an SPI register, | |
105 | * using a series of 16-bit transfers. */ | |
106 | static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) | |
107 | { | |
108 | int err = 0; | |
d18ba452 | 109 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK); |
4d1d4985 SAS |
110 | struct spi_message m; |
111 | struct spi_transfer reg_trans; | |
112 | struct spi_transfer data_trans; | |
113 | ||
114 | spi_message_init(&m); | |
115 | memset(®_trans, 0, sizeof(reg_trans)); | |
116 | memset(&data_trans, 0, sizeof(data_trans)); | |
d2b21f19 CM |
117 | |
118 | /* You must give an even number of bytes to the SPU, even if it | |
119 | * doesn't care about the last one. */ | |
120 | BUG_ON(len & 0x1); | |
121 | ||
122 | spu_transaction_init(card); | |
123 | ||
124 | /* write SPU register index */ | |
4d1d4985 SAS |
125 | reg_trans.tx_buf = ®_out; |
126 | reg_trans.len = sizeof(reg_out); | |
d2b21f19 | 127 | |
4d1d4985 SAS |
128 | data_trans.tx_buf = buf; |
129 | data_trans.len = len; | |
d2b21f19 | 130 | |
4d1d4985 SAS |
131 | spi_message_add_tail(®_trans, &m); |
132 | spi_message_add_tail(&data_trans, &m); | |
133 | ||
134 | err = spi_sync(card->spi, &m); | |
d2b21f19 CM |
135 | spu_transaction_finish(card); |
136 | return err; | |
137 | } | |
138 | ||
139 | static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val) | |
140 | { | |
d18ba452 | 141 | __le16 buff; |
d2b21f19 | 142 | |
f488b72d SAS |
143 | buff = cpu_to_le16(val); |
144 | return spu_write(card, reg, (u8 *)&buff, sizeof(u16)); | |
d2b21f19 CM |
145 | } |
146 | ||
147 | static inline int spu_reg_is_port_reg(u16 reg) | |
148 | { | |
149 | switch (reg) { | |
150 | case IF_SPI_IO_RDWRPORT_REG: | |
151 | case IF_SPI_CMD_RDWRPORT_REG: | |
152 | case IF_SPI_DATA_RDWRPORT_REG: | |
153 | return 1; | |
154 | default: | |
155 | return 0; | |
156 | } | |
157 | } | |
158 | ||
159 | static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len) | |
160 | { | |
4d1d4985 | 161 | unsigned int delay; |
d2b21f19 | 162 | int err = 0; |
d18ba452 | 163 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK); |
4d1d4985 SAS |
164 | struct spi_message m; |
165 | struct spi_transfer reg_trans; | |
166 | struct spi_transfer dummy_trans; | |
167 | struct spi_transfer data_trans; | |
d2b21f19 CM |
168 | |
169 | /* You must take an even number of bytes from the SPU, even if you | |
170 | * don't care about the last one. */ | |
171 | BUG_ON(len & 0x1); | |
172 | ||
173 | spu_transaction_init(card); | |
174 | ||
4d1d4985 SAS |
175 | spi_message_init(&m); |
176 | memset(®_trans, 0, sizeof(reg_trans)); | |
177 | memset(&dummy_trans, 0, sizeof(dummy_trans)); | |
178 | memset(&data_trans, 0, sizeof(data_trans)); | |
179 | ||
d2b21f19 | 180 | /* write SPU register index */ |
4d1d4985 SAS |
181 | reg_trans.tx_buf = ®_out; |
182 | reg_trans.len = sizeof(reg_out); | |
183 | spi_message_add_tail(®_trans, &m); | |
d2b21f19 CM |
184 | |
185 | delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay : | |
186 | card->spu_reg_delay; | |
187 | if (card->use_dummy_writes) { | |
188 | /* Clock in dummy cycles while the SPU fills the FIFO */ | |
4d1d4985 SAS |
189 | dummy_trans.len = delay / 8; |
190 | spi_message_add_tail(&dummy_trans, &m); | |
d2b21f19 CM |
191 | } else { |
192 | /* Busy-wait while the SPU fills the FIFO */ | |
4d1d4985 SAS |
193 | reg_trans.delay_usecs = |
194 | DIV_ROUND_UP((100 + (delay * 10)), 1000); | |
d2b21f19 CM |
195 | } |
196 | ||
197 | /* read in data */ | |
4d1d4985 SAS |
198 | data_trans.rx_buf = buf; |
199 | data_trans.len = len; | |
200 | spi_message_add_tail(&data_trans, &m); | |
d2b21f19 | 201 | |
4d1d4985 | 202 | err = spi_sync(card->spi, &m); |
d2b21f19 CM |
203 | spu_transaction_finish(card); |
204 | return err; | |
205 | } | |
206 | ||
207 | /* Read 16 bits from an SPI register */ | |
208 | static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val) | |
209 | { | |
d18ba452 | 210 | __le16 buf; |
f488b72d SAS |
211 | int ret; |
212 | ||
213 | ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
214 | if (ret == 0) | |
215 | *val = le16_to_cpup(&buf); | |
216 | return ret; | |
d2b21f19 CM |
217 | } |
218 | ||
219 | /* Read 32 bits from an SPI register. | |
220 | * The low 16 bits are read first. */ | |
221 | static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val) | |
222 | { | |
d18ba452 | 223 | __le32 buf; |
d2b21f19 | 224 | int err; |
f488b72d SAS |
225 | |
226 | err = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
d2b21f19 | 227 | if (!err) |
f488b72d | 228 | *val = le32_to_cpup(&buf); |
d2b21f19 CM |
229 | return err; |
230 | } | |
231 | ||
232 | /* Keep reading 16 bits from an SPI register until you get the correct result. | |
233 | * | |
234 | * If mask = 0, the correct result is any non-zero number. | |
235 | * If mask != 0, the correct result is any number where | |
236 | * number & target_mask == target | |
237 | * | |
238 | * Returns -ETIMEDOUT if a second passes without the correct result. */ | |
239 | static int spu_wait_for_u16(struct if_spi_card *card, u16 reg, | |
240 | u16 target_mask, u16 target) | |
241 | { | |
242 | int err; | |
243 | unsigned long timeout = jiffies + 5*HZ; | |
244 | while (1) { | |
245 | u16 val; | |
246 | err = spu_read_u16(card, reg, &val); | |
247 | if (err) | |
248 | return err; | |
249 | if (target_mask) { | |
250 | if ((val & target_mask) == target) | |
251 | return 0; | |
252 | } else { | |
253 | if (val) | |
254 | return 0; | |
255 | } | |
256 | udelay(100); | |
257 | if (time_after(jiffies, timeout)) { | |
258 | lbs_pr_err("%s: timeout with val=%02x, " | |
259 | "target_mask=%02x, target=%02x\n", | |
260 | __func__, val, target_mask, target); | |
261 | return -ETIMEDOUT; | |
262 | } | |
263 | } | |
264 | } | |
265 | ||
266 | /* Read 16 bits from an SPI register until you receive a specific value. | |
267 | * Returns -ETIMEDOUT if a 4 tries pass without success. */ | |
268 | static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target) | |
269 | { | |
270 | int err, try; | |
271 | for (try = 0; try < 4; ++try) { | |
272 | u32 val = 0; | |
273 | err = spu_read_u32(card, reg, &val); | |
274 | if (err) | |
275 | return err; | |
276 | if (val == target) | |
277 | return 0; | |
278 | mdelay(100); | |
279 | } | |
280 | return -ETIMEDOUT; | |
281 | } | |
282 | ||
283 | static int spu_set_interrupt_mode(struct if_spi_card *card, | |
284 | int suppress_host_int, | |
285 | int auto_int) | |
286 | { | |
287 | int err = 0; | |
288 | ||
289 | /* We can suppress a host interrupt by clearing the appropriate | |
290 | * bit in the "host interrupt status mask" register */ | |
291 | if (suppress_host_int) { | |
292 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
293 | if (err) | |
294 | return err; | |
295 | } else { | |
296 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, | |
297 | IF_SPI_HISM_TX_DOWNLOAD_RDY | | |
298 | IF_SPI_HISM_RX_UPLOAD_RDY | | |
299 | IF_SPI_HISM_CMD_DOWNLOAD_RDY | | |
300 | IF_SPI_HISM_CARDEVENT | | |
301 | IF_SPI_HISM_CMD_UPLOAD_RDY); | |
302 | if (err) | |
303 | return err; | |
304 | } | |
305 | ||
306 | /* If auto-interrupts are on, the completion of certain transactions | |
307 | * will trigger an interrupt automatically. If auto-interrupts | |
308 | * are off, we need to set the "Card Interrupt Cause" register to | |
309 | * trigger a card interrupt. */ | |
310 | if (auto_int) { | |
311 | err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG, | |
312 | IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO | | |
313 | IF_SPI_HICT_RX_UPLOAD_OVER_AUTO | | |
314 | IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO | | |
315 | IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO); | |
316 | if (err) | |
317 | return err; | |
318 | } else { | |
319 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
320 | if (err) | |
321 | return err; | |
322 | } | |
323 | return err; | |
324 | } | |
325 | ||
326 | static int spu_get_chip_revision(struct if_spi_card *card, | |
327 | u16 *card_id, u8 *card_rev) | |
328 | { | |
329 | int err = 0; | |
330 | u32 dev_ctrl; | |
331 | err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl); | |
332 | if (err) | |
333 | return err; | |
334 | *card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl); | |
335 | *card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl); | |
336 | return err; | |
337 | } | |
338 | ||
339 | static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) | |
340 | { | |
341 | int err = 0; | |
342 | u16 rval; | |
343 | /* set bus mode */ | |
344 | err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode); | |
345 | if (err) | |
346 | return err; | |
347 | /* Check that we were able to read back what we just wrote. */ | |
348 | err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); | |
349 | if (err) | |
350 | return err; | |
88d89526 | 351 | if ((rval & 0xF) != mode) { |
d2b21f19 CM |
352 | lbs_pr_err("Can't read bus mode register.\n"); |
353 | return -EIO; | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int spu_init(struct if_spi_card *card, int use_dummy_writes) | |
359 | { | |
360 | int err = 0; | |
361 | u32 delay; | |
362 | ||
363 | /* We have to start up in timed delay mode so that we can safely | |
364 | * read the Delay Read Register. */ | |
365 | card->use_dummy_writes = 0; | |
366 | err = spu_set_bus_mode(card, | |
367 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
368 | IF_SPI_BUS_MODE_DELAY_METHOD_TIMED | | |
369 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
370 | if (err) | |
371 | return err; | |
372 | card->spu_port_delay = 1000; | |
373 | card->spu_reg_delay = 1000; | |
374 | err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay); | |
375 | if (err) | |
376 | return err; | |
377 | card->spu_port_delay = delay & 0x0000ffff; | |
378 | card->spu_reg_delay = (delay & 0xffff0000) >> 16; | |
379 | ||
380 | /* If dummy clock delay mode has been requested, switch to it now */ | |
381 | if (use_dummy_writes) { | |
382 | card->use_dummy_writes = 1; | |
383 | err = spu_set_bus_mode(card, | |
384 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
385 | IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK | | |
386 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
387 | if (err) | |
388 | return err; | |
389 | } | |
390 | ||
391 | lbs_deb_spi("Initialized SPU unit. " | |
392 | "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n", | |
393 | card->spu_port_delay, card->spu_reg_delay); | |
394 | return err; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Firmware Loading | |
399 | */ | |
400 | ||
401 | static int if_spi_prog_helper_firmware(struct if_spi_card *card) | |
402 | { | |
403 | int err = 0; | |
404 | const struct firmware *firmware = NULL; | |
405 | int bytes_remaining; | |
406 | const u8 *fw; | |
407 | u8 temp[HELPER_FW_LOAD_CHUNK_SZ]; | |
408 | struct spi_device *spi = card->spi; | |
409 | ||
410 | lbs_deb_enter(LBS_DEB_SPI); | |
411 | ||
412 | err = spu_set_interrupt_mode(card, 1, 0); | |
413 | if (err) | |
414 | goto out; | |
415 | /* Get helper firmware image */ | |
416 | err = request_firmware(&firmware, card->helper_fw_name, &spi->dev); | |
417 | if (err) { | |
418 | lbs_pr_err("request_firmware failed with err = %d\n", err); | |
419 | goto out; | |
420 | } | |
421 | bytes_remaining = firmware->size; | |
422 | fw = firmware->data; | |
423 | ||
424 | /* Load helper firmware image */ | |
425 | while (bytes_remaining > 0) { | |
426 | /* Scratch pad 1 should contain the number of bytes we | |
427 | * want to download to the firmware */ | |
428 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, | |
429 | HELPER_FW_LOAD_CHUNK_SZ); | |
430 | if (err) | |
431 | goto release_firmware; | |
432 | ||
433 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
434 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
435 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
436 | if (err) | |
437 | goto release_firmware; | |
438 | ||
439 | /* Feed the data into the command read/write port reg | |
440 | * in chunks of 64 bytes */ | |
441 | memset(temp, 0, sizeof(temp)); | |
442 | memcpy(temp, fw, | |
443 | min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ)); | |
444 | mdelay(10); | |
445 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
446 | temp, HELPER_FW_LOAD_CHUNK_SZ); | |
447 | if (err) | |
448 | goto release_firmware; | |
449 | ||
450 | /* Interrupt the boot code */ | |
451 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
452 | if (err) | |
453 | goto release_firmware; | |
454 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, | |
455 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
456 | if (err) | |
457 | goto release_firmware; | |
458 | bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ; | |
459 | fw += HELPER_FW_LOAD_CHUNK_SZ; | |
460 | } | |
461 | ||
462 | /* Once the helper / single stage firmware download is complete, | |
463 | * write 0 to scratch pad 1 and interrupt the | |
464 | * bootloader. This completes the helper download. */ | |
465 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK); | |
466 | if (err) | |
467 | goto release_firmware; | |
468 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
469 | if (err) | |
470 | goto release_firmware; | |
471 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, | |
472 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
473 | goto release_firmware; | |
474 | ||
475 | lbs_deb_spi("waiting for helper to boot...\n"); | |
476 | ||
477 | release_firmware: | |
478 | release_firmware(firmware); | |
479 | out: | |
480 | if (err) | |
481 | lbs_pr_err("failed to load helper firmware (err=%d)\n", err); | |
482 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
483 | return err; | |
484 | } | |
485 | ||
486 | /* Returns the length of the next packet the firmware expects us to send | |
487 | * Sets crc_err if the previous transfer had a CRC error. */ | |
488 | static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card, | |
489 | int *crc_err) | |
490 | { | |
491 | u16 len; | |
492 | int err = 0; | |
493 | ||
494 | /* wait until the host interrupt status register indicates | |
495 | * that we are ready to download */ | |
496 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
497 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
498 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
499 | if (err) { | |
500 | lbs_pr_err("timed out waiting for host_int_status\n"); | |
501 | return err; | |
502 | } | |
503 | ||
504 | /* Ask the device how many bytes of firmware it wants. */ | |
505 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
506 | if (err) | |
507 | return err; | |
508 | ||
509 | if (len > IF_SPI_CMD_BUF_SIZE) { | |
510 | lbs_pr_err("firmware load device requested a larger " | |
511 | "tranfer than we are prepared to " | |
512 | "handle. (len = %d)\n", len); | |
513 | return -EIO; | |
514 | } | |
515 | if (len & 0x1) { | |
516 | lbs_deb_spi("%s: crc error\n", __func__); | |
517 | len &= ~0x1; | |
518 | *crc_err = 1; | |
519 | } else | |
520 | *crc_err = 0; | |
521 | ||
522 | return len; | |
523 | } | |
524 | ||
525 | static int if_spi_prog_main_firmware(struct if_spi_card *card) | |
526 | { | |
527 | int len, prev_len; | |
528 | int bytes, crc_err = 0, err = 0; | |
529 | const struct firmware *firmware = NULL; | |
530 | const u8 *fw; | |
531 | struct spi_device *spi = card->spi; | |
532 | u16 num_crc_errs; | |
533 | ||
534 | lbs_deb_enter(LBS_DEB_SPI); | |
535 | ||
536 | err = spu_set_interrupt_mode(card, 1, 0); | |
537 | if (err) | |
538 | goto out; | |
539 | ||
540 | /* Get firmware image */ | |
541 | err = request_firmware(&firmware, card->main_fw_name, &spi->dev); | |
542 | if (err) { | |
543 | lbs_pr_err("%s: can't get firmware '%s' from kernel. " | |
544 | "err = %d\n", __func__, card->main_fw_name, err); | |
545 | goto out; | |
546 | } | |
547 | ||
548 | err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0); | |
549 | if (err) { | |
550 | lbs_pr_err("%s: timed out waiting for initial " | |
551 | "scratch reg = 0\n", __func__); | |
552 | goto release_firmware; | |
553 | } | |
554 | ||
555 | num_crc_errs = 0; | |
556 | prev_len = 0; | |
557 | bytes = firmware->size; | |
558 | fw = firmware->data; | |
559 | while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) { | |
560 | if (len < 0) { | |
561 | err = len; | |
562 | goto release_firmware; | |
563 | } | |
564 | if (bytes < 0) { | |
565 | /* If there are no more bytes left, we would normally | |
566 | * expect to have terminated with len = 0 */ | |
567 | lbs_pr_err("Firmware load wants more bytes " | |
568 | "than we have to offer.\n"); | |
569 | break; | |
570 | } | |
571 | if (crc_err) { | |
572 | /* Previous transfer failed. */ | |
573 | if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) { | |
574 | lbs_pr_err("Too many CRC errors encountered " | |
575 | "in firmware load.\n"); | |
576 | err = -EIO; | |
577 | goto release_firmware; | |
578 | } | |
579 | } else { | |
580 | /* Previous transfer succeeded. Advance counters. */ | |
581 | bytes -= prev_len; | |
582 | fw += prev_len; | |
583 | } | |
584 | if (bytes < len) { | |
585 | memset(card->cmd_buffer, 0, len); | |
586 | memcpy(card->cmd_buffer, fw, bytes); | |
587 | } else | |
588 | memcpy(card->cmd_buffer, fw, len); | |
589 | ||
590 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
591 | if (err) | |
592 | goto release_firmware; | |
593 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
594 | card->cmd_buffer, len); | |
595 | if (err) | |
596 | goto release_firmware; | |
597 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG , | |
598 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
599 | if (err) | |
600 | goto release_firmware; | |
601 | prev_len = len; | |
602 | } | |
603 | if (bytes > prev_len) { | |
604 | lbs_pr_err("firmware load wants fewer bytes than " | |
605 | "we have to offer.\n"); | |
606 | } | |
607 | ||
608 | /* Confirm firmware download */ | |
609 | err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG, | |
610 | SUCCESSFUL_FW_DOWNLOAD_MAGIC); | |
611 | if (err) { | |
612 | lbs_pr_err("failed to confirm the firmware download\n"); | |
613 | goto release_firmware; | |
614 | } | |
615 | ||
616 | release_firmware: | |
617 | release_firmware(firmware); | |
618 | ||
619 | out: | |
620 | if (err) | |
621 | lbs_pr_err("failed to load firmware (err=%d)\n", err); | |
622 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
623 | return err; | |
624 | } | |
625 | ||
626 | /* | |
627 | * SPI Transfer Thread | |
628 | * | |
629 | * The SPI thread handles all SPI transfers, so there is no need for a lock. | |
630 | */ | |
631 | ||
632 | /* Move a command from the card to the host */ | |
633 | static int if_spi_c2h_cmd(struct if_spi_card *card) | |
634 | { | |
635 | struct lbs_private *priv = card->priv; | |
636 | unsigned long flags; | |
637 | int err = 0; | |
638 | u16 len; | |
639 | u8 i; | |
640 | ||
641 | /* We need a buffer big enough to handle whatever people send to | |
642 | * hw_host_to_card */ | |
643 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE); | |
644 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE); | |
645 | ||
646 | /* It's just annoying if the buffer size isn't a multiple of 4, because | |
647 | * then we might have len < IF_SPI_CMD_BUF_SIZE but | |
648 | * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE */ | |
649 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0); | |
650 | ||
651 | lbs_deb_enter(LBS_DEB_SPI); | |
652 | ||
653 | /* How many bytes are there to read? */ | |
654 | err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len); | |
655 | if (err) | |
656 | goto out; | |
657 | if (!len) { | |
658 | lbs_pr_err("%s: error: card has no data for host\n", | |
659 | __func__); | |
660 | err = -EINVAL; | |
661 | goto out; | |
662 | } else if (len > IF_SPI_CMD_BUF_SIZE) { | |
663 | lbs_pr_err("%s: error: response packet too large: " | |
664 | "%d bytes, but maximum is %d\n", | |
665 | __func__, len, IF_SPI_CMD_BUF_SIZE); | |
666 | err = -EINVAL; | |
667 | goto out; | |
668 | } | |
669 | ||
670 | /* Read the data from the WLAN module into our command buffer */ | |
671 | err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG, | |
672 | card->cmd_buffer, ALIGN(len, 4)); | |
673 | if (err) | |
674 | goto out; | |
675 | ||
676 | spin_lock_irqsave(&priv->driver_lock, flags); | |
677 | i = (priv->resp_idx == 0) ? 1 : 0; | |
678 | BUG_ON(priv->resp_len[i]); | |
679 | priv->resp_len[i] = len; | |
680 | memcpy(priv->resp_buf[i], card->cmd_buffer, len); | |
681 | lbs_notify_command_response(priv, i); | |
682 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
683 | ||
684 | out: | |
685 | if (err) | |
686 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
687 | lbs_deb_leave(LBS_DEB_SPI); | |
688 | return err; | |
689 | } | |
690 | ||
691 | /* Move data from the card to the host */ | |
692 | static int if_spi_c2h_data(struct if_spi_card *card) | |
693 | { | |
694 | struct sk_buff *skb; | |
695 | char *data; | |
696 | u16 len; | |
697 | int err = 0; | |
698 | ||
699 | lbs_deb_enter(LBS_DEB_SPI); | |
700 | ||
701 | /* How many bytes are there to read? */ | |
702 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
703 | if (err) | |
704 | goto out; | |
705 | if (!len) { | |
706 | lbs_pr_err("%s: error: card has no data for host\n", | |
707 | __func__); | |
708 | err = -EINVAL; | |
709 | goto out; | |
710 | } else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
711 | lbs_pr_err("%s: error: card has %d bytes of data, but " | |
efcfd1f2 | 712 | "our maximum skb size is %zu\n", |
d2b21f19 CM |
713 | __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); |
714 | err = -EINVAL; | |
715 | goto out; | |
716 | } | |
717 | ||
718 | /* TODO: should we allocate a smaller skb if we have less data? */ | |
719 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
720 | if (!skb) { | |
721 | err = -ENOBUFS; | |
722 | goto out; | |
723 | } | |
724 | skb_reserve(skb, IPFIELD_ALIGN_OFFSET); | |
725 | data = skb_put(skb, len); | |
726 | ||
727 | /* Read the data from the WLAN module into our skb... */ | |
728 | err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); | |
729 | if (err) | |
730 | goto free_skb; | |
731 | ||
732 | /* pass the SKB to libertas */ | |
733 | err = lbs_process_rxed_packet(card->priv, skb); | |
734 | if (err) | |
735 | goto free_skb; | |
736 | ||
737 | /* success */ | |
738 | goto out; | |
739 | ||
740 | free_skb: | |
741 | dev_kfree_skb(skb); | |
742 | out: | |
743 | if (err) | |
744 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
745 | lbs_deb_leave(LBS_DEB_SPI); | |
746 | return err; | |
747 | } | |
748 | ||
d2b21f19 CM |
749 | /* Inform the host about a card event */ |
750 | static void if_spi_e2h(struct if_spi_card *card) | |
751 | { | |
752 | int err = 0; | |
d2b21f19 CM |
753 | u32 cause; |
754 | struct lbs_private *priv = card->priv; | |
755 | ||
756 | err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause); | |
757 | if (err) | |
758 | goto out; | |
759 | ||
ea2d0639 | 760 | /* re-enable the card event interrupt */ |
761 | spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
762 | ~IF_SPI_HICU_CARD_EVENT); | |
763 | ||
764 | /* generate a card interrupt */ | |
765 | spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT); | |
766 | ||
d2b21f19 | 767 | lbs_queue_event(priv, cause & 0xff); |
d2b21f19 CM |
768 | out: |
769 | if (err) | |
770 | lbs_pr_err("%s: error %d\n", __func__, err); | |
771 | } | |
772 | ||
773 | static int lbs_spi_thread(void *data) | |
774 | { | |
775 | int err; | |
776 | struct if_spi_card *card = data; | |
777 | u16 hiStatus; | |
d2b21f19 CM |
778 | |
779 | while (1) { | |
780 | /* Wait to be woken up by one of two things. First, our ISR | |
781 | * could tell us that something happened on the WLAN. | |
782 | * Secondly, libertas could call hw_host_to_card with more | |
783 | * data, which we might be able to send. | |
784 | */ | |
785 | do { | |
786 | err = down_interruptible(&card->spi_ready); | |
787 | if (!card->run_thread) { | |
788 | up(&card->spi_thread_terminated); | |
789 | do_exit(0); | |
790 | } | |
791 | } while (err == EINTR); | |
792 | ||
793 | /* Read the host interrupt status register to see what we | |
794 | * can do. */ | |
795 | err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
796 | &hiStatus); | |
797 | if (err) { | |
798 | lbs_pr_err("I/O error\n"); | |
799 | goto err; | |
800 | } | |
801 | ||
802 | if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) | |
803 | err = if_spi_c2h_cmd(card); | |
804 | if (err) | |
805 | goto err; | |
806 | if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) | |
807 | err = if_spi_c2h_data(card); | |
808 | if (err) | |
809 | goto err; | |
b3781c74 AY |
810 | |
811 | /* workaround: in PS mode, the card does not set the Command | |
812 | * Download Ready bit, but it sets TX Download Ready. */ | |
813 | if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY || | |
814 | (card->priv->psstate != PS_STATE_FULL_POWER && | |
815 | (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) { | |
d2b21f19 | 816 | lbs_host_to_card_done(card->priv); |
d2b21f19 | 817 | } |
d2b21f19 | 818 | |
d2b21f19 CM |
819 | if (hiStatus & IF_SPI_HIST_CARD_EVENT) |
820 | if_spi_e2h(card); | |
821 | ||
822 | err: | |
823 | if (err) | |
824 | lbs_pr_err("%s: got error %d\n", __func__, err); | |
825 | } | |
826 | } | |
827 | ||
828 | /* Block until lbs_spi_thread thread has terminated */ | |
829 | static void if_spi_terminate_spi_thread(struct if_spi_card *card) | |
830 | { | |
831 | /* It would be nice to use kthread_stop here, but that function | |
832 | * can't wake threads waiting for a semaphore. */ | |
833 | card->run_thread = 0; | |
834 | up(&card->spi_ready); | |
835 | down(&card->spi_thread_terminated); | |
836 | } | |
837 | ||
838 | /* | |
839 | * Host to Card | |
840 | * | |
841 | * Called from Libertas to transfer some data to the WLAN device | |
842 | * We can't sleep here. */ | |
843 | static int if_spi_host_to_card(struct lbs_private *priv, | |
844 | u8 type, u8 *buf, u16 nb) | |
845 | { | |
846 | int err = 0; | |
d2b21f19 | 847 | struct if_spi_card *card = priv->card; |
d2b21f19 CM |
848 | |
849 | lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb); | |
850 | ||
86c34fe8 | 851 | nb = ALIGN(nb, 4); |
d2b21f19 CM |
852 | |
853 | switch (type) { | |
854 | case MVMS_CMD: | |
86c34fe8 | 855 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, buf, nb); |
d2b21f19 CM |
856 | break; |
857 | case MVMS_DAT: | |
86c34fe8 | 858 | err = spu_write(card, IF_SPI_DATA_RDWRPORT_REG, buf, nb); |
d2b21f19 CM |
859 | break; |
860 | default: | |
861 | lbs_pr_err("can't transfer buffer of type %d", type); | |
862 | err = -EINVAL; | |
863 | break; | |
864 | } | |
865 | ||
d2b21f19 CM |
866 | lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err); |
867 | return err; | |
868 | } | |
869 | ||
870 | /* | |
871 | * Host Interrupts | |
872 | * | |
873 | * Service incoming interrupts from the WLAN device. We can't sleep here, so | |
874 | * don't try to talk on the SPI bus, just wake up the SPI thread. | |
875 | */ | |
876 | static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id) | |
877 | { | |
878 | struct if_spi_card *card = dev_id; | |
879 | ||
880 | up(&card->spi_ready); | |
881 | return IRQ_HANDLED; | |
882 | } | |
883 | ||
884 | /* | |
885 | * SPI callbacks | |
886 | */ | |
887 | ||
888 | static int if_spi_calculate_fw_names(u16 card_id, | |
889 | char *helper_fw, char *main_fw) | |
890 | { | |
891 | int i; | |
892 | for (i = 0; i < ARRAY_SIZE(chip_id_to_device_name); ++i) { | |
893 | if (card_id == chip_id_to_device_name[i].chip_id) | |
894 | break; | |
895 | } | |
896 | if (i == ARRAY_SIZE(chip_id_to_device_name)) { | |
897 | lbs_pr_err("Unsupported chip_id: 0x%02x\n", card_id); | |
898 | return -EAFNOSUPPORT; | |
899 | } | |
cadeba31 | 900 | snprintf(helper_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d_hlp.bin", |
d2b21f19 | 901 | chip_id_to_device_name[i].name); |
cadeba31 | 902 | snprintf(main_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d.bin", |
d2b21f19 CM |
903 | chip_id_to_device_name[i].name); |
904 | return 0; | |
905 | } | |
a974a4bb BH |
906 | MODULE_FIRMWARE("libertas/gspi8385_hlp.bin"); |
907 | MODULE_FIRMWARE("libertas/gspi8385.bin"); | |
908 | MODULE_FIRMWARE("libertas/gspi8686_hlp.bin"); | |
909 | MODULE_FIRMWARE("libertas/gspi8686.bin"); | |
d2b21f19 CM |
910 | |
911 | static int __devinit if_spi_probe(struct spi_device *spi) | |
912 | { | |
913 | struct if_spi_card *card; | |
914 | struct lbs_private *priv = NULL; | |
915 | struct libertas_spi_platform_data *pdata = spi->dev.platform_data; | |
916 | int err = 0; | |
917 | u32 scratch; | |
b26ed97c | 918 | struct sched_param param = { .sched_priority = 1 }; |
d2b21f19 CM |
919 | |
920 | lbs_deb_enter(LBS_DEB_SPI); | |
921 | ||
0c2bec96 MR |
922 | if (!pdata) { |
923 | err = -EINVAL; | |
924 | goto out; | |
925 | } | |
926 | ||
927 | if (pdata->setup) { | |
928 | err = pdata->setup(spi); | |
929 | if (err) | |
930 | goto out; | |
931 | } | |
932 | ||
d2b21f19 CM |
933 | /* Allocate card structure to represent this specific device */ |
934 | card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL); | |
935 | if (!card) { | |
936 | err = -ENOMEM; | |
937 | goto out; | |
938 | } | |
939 | spi_set_drvdata(spi, card); | |
0c2bec96 | 940 | card->pdata = pdata; |
d2b21f19 | 941 | card->spi = spi; |
d2b21f19 CM |
942 | card->prev_xfer_time = jiffies; |
943 | ||
944 | sema_init(&card->spi_ready, 0); | |
945 | sema_init(&card->spi_thread_terminated, 0); | |
d2b21f19 | 946 | |
d2b21f19 CM |
947 | /* Initialize the SPI Interface Unit */ |
948 | err = spu_init(card, pdata->use_dummy_writes); | |
949 | if (err) | |
4d1d4985 | 950 | goto free_card; |
d2b21f19 CM |
951 | err = spu_get_chip_revision(card, &card->card_id, &card->card_rev); |
952 | if (err) | |
4d1d4985 | 953 | goto free_card; |
d2b21f19 CM |
954 | |
955 | /* Firmware load */ | |
956 | err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch); | |
957 | if (err) | |
4d1d4985 | 958 | goto free_card; |
d2b21f19 CM |
959 | if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC) |
960 | lbs_deb_spi("Firmware is already loaded for " | |
961 | "Marvell WLAN 802.11 adapter\n"); | |
962 | else { | |
963 | err = if_spi_calculate_fw_names(card->card_id, | |
964 | card->helper_fw_name, card->main_fw_name); | |
965 | if (err) | |
4d1d4985 | 966 | goto free_card; |
d2b21f19 CM |
967 | |
968 | lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter " | |
969 | "(chip_id = 0x%04x, chip_rev = 0x%02x) " | |
970 | "attached to SPI bus_num %d, chip_select %d. " | |
971 | "spi->max_speed_hz=%d\n", | |
972 | card->card_id, card->card_rev, | |
973 | spi->master->bus_num, spi->chip_select, | |
974 | spi->max_speed_hz); | |
975 | err = if_spi_prog_helper_firmware(card); | |
976 | if (err) | |
4d1d4985 | 977 | goto free_card; |
d2b21f19 CM |
978 | err = if_spi_prog_main_firmware(card); |
979 | if (err) | |
4d1d4985 | 980 | goto free_card; |
d2b21f19 CM |
981 | lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n"); |
982 | } | |
983 | ||
984 | err = spu_set_interrupt_mode(card, 0, 1); | |
985 | if (err) | |
4d1d4985 | 986 | goto free_card; |
d2b21f19 CM |
987 | |
988 | /* Register our card with libertas. | |
989 | * This will call alloc_etherdev */ | |
990 | priv = lbs_add_card(card, &spi->dev); | |
991 | if (!priv) { | |
992 | err = -ENOMEM; | |
4d1d4985 | 993 | goto free_card; |
d2b21f19 CM |
994 | } |
995 | card->priv = priv; | |
996 | priv->card = card; | |
997 | priv->hw_host_to_card = if_spi_host_to_card; | |
49125454 AK |
998 | priv->enter_deep_sleep = NULL; |
999 | priv->exit_deep_sleep = NULL; | |
1000 | priv->reset_deep_sleep_wakeup = NULL; | |
d2b21f19 | 1001 | priv->fw_ready = 1; |
d2b21f19 CM |
1002 | |
1003 | /* Initialize interrupt handling stuff. */ | |
1004 | card->run_thread = 1; | |
1005 | card->spi_thread = kthread_run(lbs_spi_thread, card, "lbs_spi_thread"); | |
1006 | if (IS_ERR(card->spi_thread)) { | |
1007 | card->run_thread = 0; | |
1008 | err = PTR_ERR(card->spi_thread); | |
1009 | lbs_pr_err("error creating SPI thread: err=%d\n", err); | |
1010 | goto remove_card; | |
1011 | } | |
b26ed97c AN |
1012 | if (sched_setscheduler(card->spi_thread, SCHED_FIFO, ¶m)) |
1013 | lbs_pr_err("Error setting scheduler, using default.\n"); | |
1014 | ||
d2b21f19 CM |
1015 | err = request_irq(spi->irq, if_spi_host_interrupt, |
1016 | IRQF_TRIGGER_FALLING, "libertas_spi", card); | |
1017 | if (err) { | |
1018 | lbs_pr_err("can't get host irq line-- request_irq failed\n"); | |
1019 | goto terminate_thread; | |
1020 | } | |
1021 | ||
86c34fe8 AY |
1022 | /* poke the IRQ handler so that we don't miss the first interrupt */ |
1023 | up(&card->spi_ready); | |
1024 | ||
d2b21f19 CM |
1025 | /* Start the card. |
1026 | * This will call register_netdev, and we'll start | |
1027 | * getting interrupts... */ | |
1028 | err = lbs_start_card(priv); | |
1029 | if (err) | |
1030 | goto release_irq; | |
1031 | ||
1032 | lbs_deb_spi("Finished initializing WLAN module.\n"); | |
1033 | ||
1034 | /* successful exit */ | |
1035 | goto out; | |
1036 | ||
1037 | release_irq: | |
1038 | free_irq(spi->irq, card); | |
1039 | terminate_thread: | |
1040 | if_spi_terminate_spi_thread(card); | |
1041 | remove_card: | |
1042 | lbs_remove_card(priv); /* will call free_netdev */ | |
d2b21f19 CM |
1043 | free_card: |
1044 | free_if_spi_card(card); | |
1045 | out: | |
1046 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | static int __devexit libertas_spi_remove(struct spi_device *spi) | |
1051 | { | |
1052 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1053 | struct lbs_private *priv = card->priv; | |
1054 | ||
1055 | lbs_deb_spi("libertas_spi_remove\n"); | |
1056 | lbs_deb_enter(LBS_DEB_SPI); | |
d2b21f19 CM |
1057 | |
1058 | lbs_stop_card(priv); | |
efcfd1f2 AY |
1059 | lbs_remove_card(priv); /* will call free_netdev */ |
1060 | ||
1061 | priv->surpriseremoved = 1; | |
d2b21f19 CM |
1062 | free_irq(spi->irq, card); |
1063 | if_spi_terminate_spi_thread(card); | |
0c2bec96 MR |
1064 | if (card->pdata->teardown) |
1065 | card->pdata->teardown(spi); | |
d2b21f19 CM |
1066 | free_if_spi_card(card); |
1067 | lbs_deb_leave(LBS_DEB_SPI); | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | static struct spi_driver libertas_spi_driver = { | |
1072 | .probe = if_spi_probe, | |
1073 | .remove = __devexit_p(libertas_spi_remove), | |
1074 | .driver = { | |
1075 | .name = "libertas_spi", | |
1076 | .bus = &spi_bus_type, | |
1077 | .owner = THIS_MODULE, | |
1078 | }, | |
1079 | }; | |
1080 | ||
1081 | /* | |
1082 | * Module functions | |
1083 | */ | |
1084 | ||
1085 | static int __init if_spi_init_module(void) | |
1086 | { | |
1087 | int ret = 0; | |
1088 | lbs_deb_enter(LBS_DEB_SPI); | |
1089 | printk(KERN_INFO "libertas_spi: Libertas SPI driver\n"); | |
1090 | ret = spi_register_driver(&libertas_spi_driver); | |
1091 | lbs_deb_leave(LBS_DEB_SPI); | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | static void __exit if_spi_exit_module(void) | |
1096 | { | |
1097 | lbs_deb_enter(LBS_DEB_SPI); | |
1098 | spi_unregister_driver(&libertas_spi_driver); | |
1099 | lbs_deb_leave(LBS_DEB_SPI); | |
1100 | } | |
1101 | ||
1102 | module_init(if_spi_init_module); | |
1103 | module_exit(if_spi_exit_module); | |
1104 | ||
1105 | MODULE_DESCRIPTION("Libertas SPI WLAN Driver"); | |
1106 | MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, " | |
1107 | "Colin McCabe <colin@cozybit.com>"); | |
1108 | MODULE_LICENSE("GPL"); | |
e0626e38 | 1109 | MODULE_ALIAS("spi:libertas_spi"); |