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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> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
d2b21f19 CM |
28 | #include <linux/spi/libertas_spi.h> |
29 | #include <linux/spi/spi.h> | |
30 | ||
31 | #include "host.h" | |
32 | #include "decl.h" | |
33 | #include "defs.h" | |
34 | #include "dev.h" | |
35 | #include "if_spi.h" | |
36 | ||
d2b21f19 CM |
37 | struct if_spi_card { |
38 | struct spi_device *spi; | |
39 | struct lbs_private *priv; | |
0c2bec96 | 40 | struct libertas_spi_platform_data *pdata; |
d2b21f19 | 41 | |
cadeba31 JL |
42 | char helper_fw_name[IF_SPI_FW_NAME_MAX]; |
43 | char main_fw_name[IF_SPI_FW_NAME_MAX]; | |
d2b21f19 CM |
44 | |
45 | /* The card ID and card revision, as reported by the hardware. */ | |
46 | u16 card_id; | |
47 | u8 card_rev; | |
48 | ||
d2b21f19 CM |
49 | /* The last time that we initiated an SPU operation */ |
50 | unsigned long prev_xfer_time; | |
51 | ||
52 | int use_dummy_writes; | |
53 | unsigned long spu_port_delay; | |
54 | unsigned long spu_reg_delay; | |
55 | ||
56 | /* Handles all SPI communication (except for FW load) */ | |
57 | struct task_struct *spi_thread; | |
58 | int run_thread; | |
59 | ||
60 | /* Used to wake up the spi_thread */ | |
61 | struct semaphore spi_ready; | |
62 | struct semaphore spi_thread_terminated; | |
63 | ||
64 | u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE]; | |
d2b21f19 CM |
65 | }; |
66 | ||
67 | static void free_if_spi_card(struct if_spi_card *card) | |
68 | { | |
d2b21f19 CM |
69 | spi_set_drvdata(card->spi, NULL); |
70 | kfree(card); | |
71 | } | |
72 | ||
73 | static struct chip_ident chip_id_to_device_name[] = { | |
74 | { .chip_id = 0x04, .name = 8385 }, | |
75 | { .chip_id = 0x0b, .name = 8686 }, | |
76 | }; | |
77 | ||
78 | /* | |
79 | * SPI Interface Unit Routines | |
80 | * | |
81 | * The SPU sits between the host and the WLAN module. | |
82 | * All communication with the firmware is through SPU transactions. | |
83 | * | |
84 | * First we have to put a SPU register name on the bus. Then we can | |
85 | * either read from or write to that register. | |
86 | * | |
d2b21f19 CM |
87 | */ |
88 | ||
89 | static void spu_transaction_init(struct if_spi_card *card) | |
90 | { | |
91 | if (!time_after(jiffies, card->prev_xfer_time + 1)) { | |
92 | /* Unfortunately, the SPU requires a delay between successive | |
93 | * transactions. If our last transaction was more than a jiffy | |
94 | * ago, we have obviously already delayed enough. | |
95 | * If not, we have to busy-wait to be on the safe side. */ | |
96 | ndelay(400); | |
97 | } | |
d2b21f19 CM |
98 | } |
99 | ||
100 | static void spu_transaction_finish(struct if_spi_card *card) | |
101 | { | |
d2b21f19 CM |
102 | card->prev_xfer_time = jiffies; |
103 | } | |
104 | ||
105 | /* Write out a byte buffer to an SPI register, | |
106 | * using a series of 16-bit transfers. */ | |
107 | static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) | |
108 | { | |
109 | int err = 0; | |
d18ba452 | 110 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK); |
4d1d4985 SAS |
111 | struct spi_message m; |
112 | struct spi_transfer reg_trans; | |
113 | struct spi_transfer data_trans; | |
114 | ||
115 | spi_message_init(&m); | |
116 | memset(®_trans, 0, sizeof(reg_trans)); | |
117 | memset(&data_trans, 0, sizeof(data_trans)); | |
d2b21f19 CM |
118 | |
119 | /* You must give an even number of bytes to the SPU, even if it | |
120 | * doesn't care about the last one. */ | |
121 | BUG_ON(len & 0x1); | |
122 | ||
123 | spu_transaction_init(card); | |
124 | ||
125 | /* write SPU register index */ | |
4d1d4985 SAS |
126 | reg_trans.tx_buf = ®_out; |
127 | reg_trans.len = sizeof(reg_out); | |
d2b21f19 | 128 | |
4d1d4985 SAS |
129 | data_trans.tx_buf = buf; |
130 | data_trans.len = len; | |
d2b21f19 | 131 | |
4d1d4985 SAS |
132 | spi_message_add_tail(®_trans, &m); |
133 | spi_message_add_tail(&data_trans, &m); | |
134 | ||
135 | err = spi_sync(card->spi, &m); | |
d2b21f19 CM |
136 | spu_transaction_finish(card); |
137 | return err; | |
138 | } | |
139 | ||
140 | static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val) | |
141 | { | |
d18ba452 | 142 | __le16 buff; |
d2b21f19 | 143 | |
f488b72d SAS |
144 | buff = cpu_to_le16(val); |
145 | return spu_write(card, reg, (u8 *)&buff, sizeof(u16)); | |
d2b21f19 CM |
146 | } |
147 | ||
148 | static inline int spu_reg_is_port_reg(u16 reg) | |
149 | { | |
150 | switch (reg) { | |
151 | case IF_SPI_IO_RDWRPORT_REG: | |
152 | case IF_SPI_CMD_RDWRPORT_REG: | |
153 | case IF_SPI_DATA_RDWRPORT_REG: | |
154 | return 1; | |
155 | default: | |
156 | return 0; | |
157 | } | |
158 | } | |
159 | ||
160 | static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len) | |
161 | { | |
4d1d4985 | 162 | unsigned int delay; |
d2b21f19 | 163 | int err = 0; |
d18ba452 | 164 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK); |
4d1d4985 SAS |
165 | struct spi_message m; |
166 | struct spi_transfer reg_trans; | |
167 | struct spi_transfer dummy_trans; | |
168 | struct spi_transfer data_trans; | |
d2b21f19 CM |
169 | |
170 | /* You must take an even number of bytes from the SPU, even if you | |
171 | * don't care about the last one. */ | |
172 | BUG_ON(len & 0x1); | |
173 | ||
174 | spu_transaction_init(card); | |
175 | ||
4d1d4985 SAS |
176 | spi_message_init(&m); |
177 | memset(®_trans, 0, sizeof(reg_trans)); | |
178 | memset(&dummy_trans, 0, sizeof(dummy_trans)); | |
179 | memset(&data_trans, 0, sizeof(data_trans)); | |
180 | ||
d2b21f19 | 181 | /* write SPU register index */ |
4d1d4985 SAS |
182 | reg_trans.tx_buf = ®_out; |
183 | reg_trans.len = sizeof(reg_out); | |
184 | spi_message_add_tail(®_trans, &m); | |
d2b21f19 CM |
185 | |
186 | delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay : | |
187 | card->spu_reg_delay; | |
188 | if (card->use_dummy_writes) { | |
189 | /* Clock in dummy cycles while the SPU fills the FIFO */ | |
4d1d4985 SAS |
190 | dummy_trans.len = delay / 8; |
191 | spi_message_add_tail(&dummy_trans, &m); | |
d2b21f19 CM |
192 | } else { |
193 | /* Busy-wait while the SPU fills the FIFO */ | |
4d1d4985 SAS |
194 | reg_trans.delay_usecs = |
195 | DIV_ROUND_UP((100 + (delay * 10)), 1000); | |
d2b21f19 CM |
196 | } |
197 | ||
198 | /* read in data */ | |
4d1d4985 SAS |
199 | data_trans.rx_buf = buf; |
200 | data_trans.len = len; | |
201 | spi_message_add_tail(&data_trans, &m); | |
d2b21f19 | 202 | |
4d1d4985 | 203 | err = spi_sync(card->spi, &m); |
d2b21f19 CM |
204 | spu_transaction_finish(card); |
205 | return err; | |
206 | } | |
207 | ||
208 | /* Read 16 bits from an SPI register */ | |
209 | static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val) | |
210 | { | |
d18ba452 | 211 | __le16 buf; |
f488b72d SAS |
212 | int ret; |
213 | ||
214 | ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
215 | if (ret == 0) | |
216 | *val = le16_to_cpup(&buf); | |
217 | return ret; | |
d2b21f19 CM |
218 | } |
219 | ||
220 | /* Read 32 bits from an SPI register. | |
221 | * The low 16 bits are read first. */ | |
222 | static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val) | |
223 | { | |
d18ba452 | 224 | __le32 buf; |
d2b21f19 | 225 | int err; |
f488b72d SAS |
226 | |
227 | err = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
d2b21f19 | 228 | if (!err) |
f488b72d | 229 | *val = le32_to_cpup(&buf); |
d2b21f19 CM |
230 | return err; |
231 | } | |
232 | ||
233 | /* Keep reading 16 bits from an SPI register until you get the correct result. | |
234 | * | |
235 | * If mask = 0, the correct result is any non-zero number. | |
236 | * If mask != 0, the correct result is any number where | |
237 | * number & target_mask == target | |
238 | * | |
239 | * Returns -ETIMEDOUT if a second passes without the correct result. */ | |
240 | static int spu_wait_for_u16(struct if_spi_card *card, u16 reg, | |
241 | u16 target_mask, u16 target) | |
242 | { | |
243 | int err; | |
244 | unsigned long timeout = jiffies + 5*HZ; | |
245 | while (1) { | |
246 | u16 val; | |
247 | err = spu_read_u16(card, reg, &val); | |
248 | if (err) | |
249 | return err; | |
250 | if (target_mask) { | |
251 | if ((val & target_mask) == target) | |
252 | return 0; | |
253 | } else { | |
254 | if (val) | |
255 | return 0; | |
256 | } | |
257 | udelay(100); | |
258 | if (time_after(jiffies, timeout)) { | |
259 | lbs_pr_err("%s: timeout with val=%02x, " | |
260 | "target_mask=%02x, target=%02x\n", | |
261 | __func__, val, target_mask, target); | |
262 | return -ETIMEDOUT; | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
267 | /* Read 16 bits from an SPI register until you receive a specific value. | |
268 | * Returns -ETIMEDOUT if a 4 tries pass without success. */ | |
269 | static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target) | |
270 | { | |
271 | int err, try; | |
272 | for (try = 0; try < 4; ++try) { | |
273 | u32 val = 0; | |
274 | err = spu_read_u32(card, reg, &val); | |
275 | if (err) | |
276 | return err; | |
277 | if (val == target) | |
278 | return 0; | |
279 | mdelay(100); | |
280 | } | |
281 | return -ETIMEDOUT; | |
282 | } | |
283 | ||
284 | static int spu_set_interrupt_mode(struct if_spi_card *card, | |
285 | int suppress_host_int, | |
286 | int auto_int) | |
287 | { | |
288 | int err = 0; | |
289 | ||
290 | /* We can suppress a host interrupt by clearing the appropriate | |
291 | * bit in the "host interrupt status mask" register */ | |
292 | if (suppress_host_int) { | |
293 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
294 | if (err) | |
295 | return err; | |
296 | } else { | |
297 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, | |
298 | IF_SPI_HISM_TX_DOWNLOAD_RDY | | |
299 | IF_SPI_HISM_RX_UPLOAD_RDY | | |
300 | IF_SPI_HISM_CMD_DOWNLOAD_RDY | | |
301 | IF_SPI_HISM_CARDEVENT | | |
302 | IF_SPI_HISM_CMD_UPLOAD_RDY); | |
303 | if (err) | |
304 | return err; | |
305 | } | |
306 | ||
307 | /* If auto-interrupts are on, the completion of certain transactions | |
308 | * will trigger an interrupt automatically. If auto-interrupts | |
309 | * are off, we need to set the "Card Interrupt Cause" register to | |
310 | * trigger a card interrupt. */ | |
311 | if (auto_int) { | |
312 | err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG, | |
313 | IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO | | |
314 | IF_SPI_HICT_RX_UPLOAD_OVER_AUTO | | |
315 | IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO | | |
316 | IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO); | |
317 | if (err) | |
318 | return err; | |
319 | } else { | |
320 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
321 | if (err) | |
322 | return err; | |
323 | } | |
324 | return err; | |
325 | } | |
326 | ||
327 | static int spu_get_chip_revision(struct if_spi_card *card, | |
328 | u16 *card_id, u8 *card_rev) | |
329 | { | |
330 | int err = 0; | |
331 | u32 dev_ctrl; | |
332 | err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl); | |
333 | if (err) | |
334 | return err; | |
335 | *card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl); | |
336 | *card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl); | |
337 | return err; | |
338 | } | |
339 | ||
340 | static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) | |
341 | { | |
342 | int err = 0; | |
343 | u16 rval; | |
344 | /* set bus mode */ | |
345 | err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode); | |
346 | if (err) | |
347 | return err; | |
348 | /* Check that we were able to read back what we just wrote. */ | |
349 | err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); | |
350 | if (err) | |
351 | return err; | |
88d89526 | 352 | if ((rval & 0xF) != mode) { |
d2b21f19 CM |
353 | lbs_pr_err("Can't read bus mode register.\n"); |
354 | return -EIO; | |
355 | } | |
356 | return 0; | |
357 | } | |
358 | ||
359 | static int spu_init(struct if_spi_card *card, int use_dummy_writes) | |
360 | { | |
361 | int err = 0; | |
362 | u32 delay; | |
363 | ||
364 | /* We have to start up in timed delay mode so that we can safely | |
365 | * read the Delay Read Register. */ | |
366 | card->use_dummy_writes = 0; | |
367 | err = spu_set_bus_mode(card, | |
368 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
369 | IF_SPI_BUS_MODE_DELAY_METHOD_TIMED | | |
370 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
371 | if (err) | |
372 | return err; | |
373 | card->spu_port_delay = 1000; | |
374 | card->spu_reg_delay = 1000; | |
375 | err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay); | |
376 | if (err) | |
377 | return err; | |
378 | card->spu_port_delay = delay & 0x0000ffff; | |
379 | card->spu_reg_delay = (delay & 0xffff0000) >> 16; | |
380 | ||
381 | /* If dummy clock delay mode has been requested, switch to it now */ | |
382 | if (use_dummy_writes) { | |
383 | card->use_dummy_writes = 1; | |
384 | err = spu_set_bus_mode(card, | |
385 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
386 | IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK | | |
387 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
388 | if (err) | |
389 | return err; | |
390 | } | |
391 | ||
392 | lbs_deb_spi("Initialized SPU unit. " | |
393 | "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n", | |
394 | card->spu_port_delay, card->spu_reg_delay); | |
395 | return err; | |
396 | } | |
397 | ||
398 | /* | |
399 | * Firmware Loading | |
400 | */ | |
401 | ||
402 | static int if_spi_prog_helper_firmware(struct if_spi_card *card) | |
403 | { | |
404 | int err = 0; | |
405 | const struct firmware *firmware = NULL; | |
406 | int bytes_remaining; | |
407 | const u8 *fw; | |
408 | u8 temp[HELPER_FW_LOAD_CHUNK_SZ]; | |
409 | struct spi_device *spi = card->spi; | |
410 | ||
411 | lbs_deb_enter(LBS_DEB_SPI); | |
412 | ||
413 | err = spu_set_interrupt_mode(card, 1, 0); | |
414 | if (err) | |
415 | goto out; | |
416 | /* Get helper firmware image */ | |
417 | err = request_firmware(&firmware, card->helper_fw_name, &spi->dev); | |
418 | if (err) { | |
419 | lbs_pr_err("request_firmware failed with err = %d\n", err); | |
420 | goto out; | |
421 | } | |
422 | bytes_remaining = firmware->size; | |
423 | fw = firmware->data; | |
424 | ||
425 | /* Load helper firmware image */ | |
426 | while (bytes_remaining > 0) { | |
427 | /* Scratch pad 1 should contain the number of bytes we | |
428 | * want to download to the firmware */ | |
429 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, | |
430 | HELPER_FW_LOAD_CHUNK_SZ); | |
431 | if (err) | |
432 | goto release_firmware; | |
433 | ||
434 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
435 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
436 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
437 | if (err) | |
438 | goto release_firmware; | |
439 | ||
440 | /* Feed the data into the command read/write port reg | |
441 | * in chunks of 64 bytes */ | |
442 | memset(temp, 0, sizeof(temp)); | |
443 | memcpy(temp, fw, | |
444 | min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ)); | |
445 | mdelay(10); | |
446 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
447 | temp, HELPER_FW_LOAD_CHUNK_SZ); | |
448 | if (err) | |
449 | goto release_firmware; | |
450 | ||
451 | /* Interrupt the boot code */ | |
452 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
453 | if (err) | |
454 | goto release_firmware; | |
455 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, | |
456 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
457 | if (err) | |
458 | goto release_firmware; | |
459 | bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ; | |
460 | fw += HELPER_FW_LOAD_CHUNK_SZ; | |
461 | } | |
462 | ||
463 | /* Once the helper / single stage firmware download is complete, | |
464 | * write 0 to scratch pad 1 and interrupt the | |
465 | * bootloader. This completes the helper download. */ | |
466 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK); | |
467 | if (err) | |
468 | goto release_firmware; | |
469 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
470 | if (err) | |
471 | goto release_firmware; | |
472 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, | |
473 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
474 | goto release_firmware; | |
475 | ||
476 | lbs_deb_spi("waiting for helper to boot...\n"); | |
477 | ||
478 | release_firmware: | |
479 | release_firmware(firmware); | |
480 | out: | |
481 | if (err) | |
482 | lbs_pr_err("failed to load helper firmware (err=%d)\n", err); | |
483 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
484 | return err; | |
485 | } | |
486 | ||
487 | /* Returns the length of the next packet the firmware expects us to send | |
488 | * Sets crc_err if the previous transfer had a CRC error. */ | |
489 | static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card, | |
490 | int *crc_err) | |
491 | { | |
492 | u16 len; | |
493 | int err = 0; | |
494 | ||
495 | /* wait until the host interrupt status register indicates | |
496 | * that we are ready to download */ | |
497 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
498 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
499 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
500 | if (err) { | |
501 | lbs_pr_err("timed out waiting for host_int_status\n"); | |
502 | return err; | |
503 | } | |
504 | ||
505 | /* Ask the device how many bytes of firmware it wants. */ | |
506 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
507 | if (err) | |
508 | return err; | |
509 | ||
510 | if (len > IF_SPI_CMD_BUF_SIZE) { | |
511 | lbs_pr_err("firmware load device requested a larger " | |
512 | "tranfer than we are prepared to " | |
513 | "handle. (len = %d)\n", len); | |
514 | return -EIO; | |
515 | } | |
516 | if (len & 0x1) { | |
517 | lbs_deb_spi("%s: crc error\n", __func__); | |
518 | len &= ~0x1; | |
519 | *crc_err = 1; | |
520 | } else | |
521 | *crc_err = 0; | |
522 | ||
523 | return len; | |
524 | } | |
525 | ||
526 | static int if_spi_prog_main_firmware(struct if_spi_card *card) | |
527 | { | |
528 | int len, prev_len; | |
529 | int bytes, crc_err = 0, err = 0; | |
530 | const struct firmware *firmware = NULL; | |
531 | const u8 *fw; | |
532 | struct spi_device *spi = card->spi; | |
533 | u16 num_crc_errs; | |
534 | ||
535 | lbs_deb_enter(LBS_DEB_SPI); | |
536 | ||
537 | err = spu_set_interrupt_mode(card, 1, 0); | |
538 | if (err) | |
539 | goto out; | |
540 | ||
541 | /* Get firmware image */ | |
542 | err = request_firmware(&firmware, card->main_fw_name, &spi->dev); | |
543 | if (err) { | |
544 | lbs_pr_err("%s: can't get firmware '%s' from kernel. " | |
545 | "err = %d\n", __func__, card->main_fw_name, err); | |
546 | goto out; | |
547 | } | |
548 | ||
549 | err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0); | |
550 | if (err) { | |
551 | lbs_pr_err("%s: timed out waiting for initial " | |
552 | "scratch reg = 0\n", __func__); | |
553 | goto release_firmware; | |
554 | } | |
555 | ||
556 | num_crc_errs = 0; | |
557 | prev_len = 0; | |
558 | bytes = firmware->size; | |
559 | fw = firmware->data; | |
560 | while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) { | |
561 | if (len < 0) { | |
562 | err = len; | |
563 | goto release_firmware; | |
564 | } | |
565 | if (bytes < 0) { | |
566 | /* If there are no more bytes left, we would normally | |
567 | * expect to have terminated with len = 0 */ | |
568 | lbs_pr_err("Firmware load wants more bytes " | |
569 | "than we have to offer.\n"); | |
570 | break; | |
571 | } | |
572 | if (crc_err) { | |
573 | /* Previous transfer failed. */ | |
574 | if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) { | |
575 | lbs_pr_err("Too many CRC errors encountered " | |
576 | "in firmware load.\n"); | |
577 | err = -EIO; | |
578 | goto release_firmware; | |
579 | } | |
580 | } else { | |
581 | /* Previous transfer succeeded. Advance counters. */ | |
582 | bytes -= prev_len; | |
583 | fw += prev_len; | |
584 | } | |
585 | if (bytes < len) { | |
586 | memset(card->cmd_buffer, 0, len); | |
587 | memcpy(card->cmd_buffer, fw, bytes); | |
588 | } else | |
589 | memcpy(card->cmd_buffer, fw, len); | |
590 | ||
591 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
592 | if (err) | |
593 | goto release_firmware; | |
594 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
595 | card->cmd_buffer, len); | |
596 | if (err) | |
597 | goto release_firmware; | |
598 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG , | |
599 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
600 | if (err) | |
601 | goto release_firmware; | |
602 | prev_len = len; | |
603 | } | |
604 | if (bytes > prev_len) { | |
605 | lbs_pr_err("firmware load wants fewer bytes than " | |
606 | "we have to offer.\n"); | |
607 | } | |
608 | ||
609 | /* Confirm firmware download */ | |
610 | err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG, | |
611 | SUCCESSFUL_FW_DOWNLOAD_MAGIC); | |
612 | if (err) { | |
613 | lbs_pr_err("failed to confirm the firmware download\n"); | |
614 | goto release_firmware; | |
615 | } | |
616 | ||
617 | release_firmware: | |
618 | release_firmware(firmware); | |
619 | ||
620 | out: | |
621 | if (err) | |
622 | lbs_pr_err("failed to load firmware (err=%d)\n", err); | |
623 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
624 | return err; | |
625 | } | |
626 | ||
627 | /* | |
628 | * SPI Transfer Thread | |
629 | * | |
630 | * The SPI thread handles all SPI transfers, so there is no need for a lock. | |
631 | */ | |
632 | ||
633 | /* Move a command from the card to the host */ | |
634 | static int if_spi_c2h_cmd(struct if_spi_card *card) | |
635 | { | |
636 | struct lbs_private *priv = card->priv; | |
637 | unsigned long flags; | |
638 | int err = 0; | |
639 | u16 len; | |
640 | u8 i; | |
641 | ||
642 | /* We need a buffer big enough to handle whatever people send to | |
643 | * hw_host_to_card */ | |
644 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE); | |
645 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE); | |
646 | ||
647 | /* It's just annoying if the buffer size isn't a multiple of 4, because | |
648 | * then we might have len < IF_SPI_CMD_BUF_SIZE but | |
649 | * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE */ | |
650 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0); | |
651 | ||
652 | lbs_deb_enter(LBS_DEB_SPI); | |
653 | ||
654 | /* How many bytes are there to read? */ | |
655 | err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len); | |
656 | if (err) | |
657 | goto out; | |
658 | if (!len) { | |
659 | lbs_pr_err("%s: error: card has no data for host\n", | |
660 | __func__); | |
661 | err = -EINVAL; | |
662 | goto out; | |
663 | } else if (len > IF_SPI_CMD_BUF_SIZE) { | |
664 | lbs_pr_err("%s: error: response packet too large: " | |
665 | "%d bytes, but maximum is %d\n", | |
666 | __func__, len, IF_SPI_CMD_BUF_SIZE); | |
667 | err = -EINVAL; | |
668 | goto out; | |
669 | } | |
670 | ||
671 | /* Read the data from the WLAN module into our command buffer */ | |
672 | err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG, | |
673 | card->cmd_buffer, ALIGN(len, 4)); | |
674 | if (err) | |
675 | goto out; | |
676 | ||
677 | spin_lock_irqsave(&priv->driver_lock, flags); | |
678 | i = (priv->resp_idx == 0) ? 1 : 0; | |
679 | BUG_ON(priv->resp_len[i]); | |
680 | priv->resp_len[i] = len; | |
681 | memcpy(priv->resp_buf[i], card->cmd_buffer, len); | |
682 | lbs_notify_command_response(priv, i); | |
683 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
684 | ||
685 | out: | |
686 | if (err) | |
687 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
688 | lbs_deb_leave(LBS_DEB_SPI); | |
689 | return err; | |
690 | } | |
691 | ||
692 | /* Move data from the card to the host */ | |
693 | static int if_spi_c2h_data(struct if_spi_card *card) | |
694 | { | |
695 | struct sk_buff *skb; | |
696 | char *data; | |
697 | u16 len; | |
698 | int err = 0; | |
699 | ||
700 | lbs_deb_enter(LBS_DEB_SPI); | |
701 | ||
702 | /* How many bytes are there to read? */ | |
703 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
704 | if (err) | |
705 | goto out; | |
706 | if (!len) { | |
707 | lbs_pr_err("%s: error: card has no data for host\n", | |
708 | __func__); | |
709 | err = -EINVAL; | |
710 | goto out; | |
711 | } else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
712 | lbs_pr_err("%s: error: card has %d bytes of data, but " | |
efcfd1f2 | 713 | "our maximum skb size is %zu\n", |
d2b21f19 CM |
714 | __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); |
715 | err = -EINVAL; | |
716 | goto out; | |
717 | } | |
718 | ||
719 | /* TODO: should we allocate a smaller skb if we have less data? */ | |
720 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
721 | if (!skb) { | |
722 | err = -ENOBUFS; | |
723 | goto out; | |
724 | } | |
725 | skb_reserve(skb, IPFIELD_ALIGN_OFFSET); | |
726 | data = skb_put(skb, len); | |
727 | ||
728 | /* Read the data from the WLAN module into our skb... */ | |
729 | err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); | |
730 | if (err) | |
731 | goto free_skb; | |
732 | ||
733 | /* pass the SKB to libertas */ | |
734 | err = lbs_process_rxed_packet(card->priv, skb); | |
735 | if (err) | |
736 | goto free_skb; | |
737 | ||
738 | /* success */ | |
739 | goto out; | |
740 | ||
741 | free_skb: | |
742 | dev_kfree_skb(skb); | |
743 | out: | |
744 | if (err) | |
745 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
746 | lbs_deb_leave(LBS_DEB_SPI); | |
747 | return err; | |
748 | } | |
749 | ||
d2b21f19 CM |
750 | /* Inform the host about a card event */ |
751 | static void if_spi_e2h(struct if_spi_card *card) | |
752 | { | |
753 | int err = 0; | |
d2b21f19 CM |
754 | u32 cause; |
755 | struct lbs_private *priv = card->priv; | |
756 | ||
757 | err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause); | |
758 | if (err) | |
759 | goto out; | |
760 | ||
ea2d0639 | 761 | /* re-enable the card event interrupt */ |
762 | spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
763 | ~IF_SPI_HICU_CARD_EVENT); | |
764 | ||
765 | /* generate a card interrupt */ | |
766 | spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT); | |
767 | ||
d2b21f19 | 768 | lbs_queue_event(priv, cause & 0xff); |
d2b21f19 CM |
769 | out: |
770 | if (err) | |
771 | lbs_pr_err("%s: error %d\n", __func__, err); | |
772 | } | |
773 | ||
774 | static int lbs_spi_thread(void *data) | |
775 | { | |
776 | int err; | |
777 | struct if_spi_card *card = data; | |
778 | u16 hiStatus; | |
d2b21f19 CM |
779 | |
780 | while (1) { | |
781 | /* Wait to be woken up by one of two things. First, our ISR | |
782 | * could tell us that something happened on the WLAN. | |
783 | * Secondly, libertas could call hw_host_to_card with more | |
784 | * data, which we might be able to send. | |
785 | */ | |
786 | do { | |
787 | err = down_interruptible(&card->spi_ready); | |
788 | if (!card->run_thread) { | |
789 | up(&card->spi_thread_terminated); | |
790 | do_exit(0); | |
791 | } | |
792 | } while (err == EINTR); | |
793 | ||
794 | /* Read the host interrupt status register to see what we | |
795 | * can do. */ | |
796 | err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
797 | &hiStatus); | |
798 | if (err) { | |
799 | lbs_pr_err("I/O error\n"); | |
800 | goto err; | |
801 | } | |
802 | ||
2674f82d | 803 | if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) { |
d2b21f19 CM |
804 | err = if_spi_c2h_cmd(card); |
805 | if (err) | |
806 | goto err; | |
2674f82d JL |
807 | } |
808 | if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) { | |
d2b21f19 CM |
809 | err = if_spi_c2h_data(card); |
810 | if (err) | |
811 | goto err; | |
2674f82d | 812 | } |
b3781c74 AY |
813 | |
814 | /* workaround: in PS mode, the card does not set the Command | |
815 | * Download Ready bit, but it sets TX Download Ready. */ | |
816 | if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY || | |
817 | (card->priv->psstate != PS_STATE_FULL_POWER && | |
818 | (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) { | |
d2b21f19 | 819 | lbs_host_to_card_done(card->priv); |
d2b21f19 | 820 | } |
d2b21f19 | 821 | |
d2b21f19 CM |
822 | if (hiStatus & IF_SPI_HIST_CARD_EVENT) |
823 | if_spi_e2h(card); | |
824 | ||
825 | err: | |
826 | if (err) | |
827 | lbs_pr_err("%s: got error %d\n", __func__, err); | |
828 | } | |
829 | } | |
830 | ||
831 | /* Block until lbs_spi_thread thread has terminated */ | |
832 | static void if_spi_terminate_spi_thread(struct if_spi_card *card) | |
833 | { | |
834 | /* It would be nice to use kthread_stop here, but that function | |
835 | * can't wake threads waiting for a semaphore. */ | |
836 | card->run_thread = 0; | |
837 | up(&card->spi_ready); | |
838 | down(&card->spi_thread_terminated); | |
839 | } | |
840 | ||
841 | /* | |
842 | * Host to Card | |
843 | * | |
844 | * Called from Libertas to transfer some data to the WLAN device | |
845 | * We can't sleep here. */ | |
846 | static int if_spi_host_to_card(struct lbs_private *priv, | |
847 | u8 type, u8 *buf, u16 nb) | |
848 | { | |
849 | int err = 0; | |
d2b21f19 | 850 | struct if_spi_card *card = priv->card; |
d2b21f19 CM |
851 | |
852 | lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb); | |
853 | ||
86c34fe8 | 854 | nb = ALIGN(nb, 4); |
d2b21f19 CM |
855 | |
856 | switch (type) { | |
857 | case MVMS_CMD: | |
86c34fe8 | 858 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, buf, nb); |
d2b21f19 CM |
859 | break; |
860 | case MVMS_DAT: | |
86c34fe8 | 861 | err = spu_write(card, IF_SPI_DATA_RDWRPORT_REG, buf, nb); |
d2b21f19 CM |
862 | break; |
863 | default: | |
864 | lbs_pr_err("can't transfer buffer of type %d", type); | |
865 | err = -EINVAL; | |
866 | break; | |
867 | } | |
868 | ||
d2b21f19 CM |
869 | lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err); |
870 | return err; | |
871 | } | |
872 | ||
873 | /* | |
874 | * Host Interrupts | |
875 | * | |
876 | * Service incoming interrupts from the WLAN device. We can't sleep here, so | |
877 | * don't try to talk on the SPI bus, just wake up the SPI thread. | |
878 | */ | |
879 | static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id) | |
880 | { | |
881 | struct if_spi_card *card = dev_id; | |
882 | ||
883 | up(&card->spi_ready); | |
884 | return IRQ_HANDLED; | |
885 | } | |
886 | ||
887 | /* | |
888 | * SPI callbacks | |
889 | */ | |
890 | ||
891 | static int if_spi_calculate_fw_names(u16 card_id, | |
892 | char *helper_fw, char *main_fw) | |
893 | { | |
894 | int i; | |
895 | for (i = 0; i < ARRAY_SIZE(chip_id_to_device_name); ++i) { | |
896 | if (card_id == chip_id_to_device_name[i].chip_id) | |
897 | break; | |
898 | } | |
899 | if (i == ARRAY_SIZE(chip_id_to_device_name)) { | |
900 | lbs_pr_err("Unsupported chip_id: 0x%02x\n", card_id); | |
901 | return -EAFNOSUPPORT; | |
902 | } | |
cadeba31 | 903 | snprintf(helper_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d_hlp.bin", |
d2b21f19 | 904 | chip_id_to_device_name[i].name); |
cadeba31 | 905 | snprintf(main_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d.bin", |
d2b21f19 CM |
906 | chip_id_to_device_name[i].name); |
907 | return 0; | |
908 | } | |
a974a4bb BH |
909 | MODULE_FIRMWARE("libertas/gspi8385_hlp.bin"); |
910 | MODULE_FIRMWARE("libertas/gspi8385.bin"); | |
911 | MODULE_FIRMWARE("libertas/gspi8686_hlp.bin"); | |
912 | MODULE_FIRMWARE("libertas/gspi8686.bin"); | |
d2b21f19 CM |
913 | |
914 | static int __devinit if_spi_probe(struct spi_device *spi) | |
915 | { | |
916 | struct if_spi_card *card; | |
917 | struct lbs_private *priv = NULL; | |
918 | struct libertas_spi_platform_data *pdata = spi->dev.platform_data; | |
919 | int err = 0; | |
920 | u32 scratch; | |
b26ed97c | 921 | struct sched_param param = { .sched_priority = 1 }; |
d2b21f19 CM |
922 | |
923 | lbs_deb_enter(LBS_DEB_SPI); | |
924 | ||
0c2bec96 MR |
925 | if (!pdata) { |
926 | err = -EINVAL; | |
927 | goto out; | |
928 | } | |
929 | ||
930 | if (pdata->setup) { | |
931 | err = pdata->setup(spi); | |
932 | if (err) | |
933 | goto out; | |
934 | } | |
935 | ||
d2b21f19 CM |
936 | /* Allocate card structure to represent this specific device */ |
937 | card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL); | |
938 | if (!card) { | |
939 | err = -ENOMEM; | |
940 | goto out; | |
941 | } | |
942 | spi_set_drvdata(spi, card); | |
0c2bec96 | 943 | card->pdata = pdata; |
d2b21f19 | 944 | card->spi = spi; |
d2b21f19 CM |
945 | card->prev_xfer_time = jiffies; |
946 | ||
947 | sema_init(&card->spi_ready, 0); | |
948 | sema_init(&card->spi_thread_terminated, 0); | |
d2b21f19 | 949 | |
d2b21f19 CM |
950 | /* Initialize the SPI Interface Unit */ |
951 | err = spu_init(card, pdata->use_dummy_writes); | |
952 | if (err) | |
4d1d4985 | 953 | goto free_card; |
d2b21f19 CM |
954 | err = spu_get_chip_revision(card, &card->card_id, &card->card_rev); |
955 | if (err) | |
4d1d4985 | 956 | goto free_card; |
d2b21f19 CM |
957 | |
958 | /* Firmware load */ | |
959 | err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch); | |
960 | if (err) | |
4d1d4985 | 961 | goto free_card; |
d2b21f19 CM |
962 | if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC) |
963 | lbs_deb_spi("Firmware is already loaded for " | |
964 | "Marvell WLAN 802.11 adapter\n"); | |
965 | else { | |
966 | err = if_spi_calculate_fw_names(card->card_id, | |
967 | card->helper_fw_name, card->main_fw_name); | |
968 | if (err) | |
4d1d4985 | 969 | goto free_card; |
d2b21f19 CM |
970 | |
971 | lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter " | |
972 | "(chip_id = 0x%04x, chip_rev = 0x%02x) " | |
973 | "attached to SPI bus_num %d, chip_select %d. " | |
974 | "spi->max_speed_hz=%d\n", | |
975 | card->card_id, card->card_rev, | |
976 | spi->master->bus_num, spi->chip_select, | |
977 | spi->max_speed_hz); | |
978 | err = if_spi_prog_helper_firmware(card); | |
979 | if (err) | |
4d1d4985 | 980 | goto free_card; |
d2b21f19 CM |
981 | err = if_spi_prog_main_firmware(card); |
982 | if (err) | |
4d1d4985 | 983 | goto free_card; |
d2b21f19 CM |
984 | lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n"); |
985 | } | |
986 | ||
987 | err = spu_set_interrupt_mode(card, 0, 1); | |
988 | if (err) | |
4d1d4985 | 989 | goto free_card; |
d2b21f19 CM |
990 | |
991 | /* Register our card with libertas. | |
992 | * This will call alloc_etherdev */ | |
993 | priv = lbs_add_card(card, &spi->dev); | |
994 | if (!priv) { | |
995 | err = -ENOMEM; | |
4d1d4985 | 996 | goto free_card; |
d2b21f19 CM |
997 | } |
998 | card->priv = priv; | |
999 | priv->card = card; | |
1000 | priv->hw_host_to_card = if_spi_host_to_card; | |
49125454 AK |
1001 | priv->enter_deep_sleep = NULL; |
1002 | priv->exit_deep_sleep = NULL; | |
1003 | priv->reset_deep_sleep_wakeup = NULL; | |
d2b21f19 | 1004 | priv->fw_ready = 1; |
d2b21f19 CM |
1005 | |
1006 | /* Initialize interrupt handling stuff. */ | |
1007 | card->run_thread = 1; | |
1008 | card->spi_thread = kthread_run(lbs_spi_thread, card, "lbs_spi_thread"); | |
1009 | if (IS_ERR(card->spi_thread)) { | |
1010 | card->run_thread = 0; | |
1011 | err = PTR_ERR(card->spi_thread); | |
1012 | lbs_pr_err("error creating SPI thread: err=%d\n", err); | |
1013 | goto remove_card; | |
1014 | } | |
b26ed97c AN |
1015 | if (sched_setscheduler(card->spi_thread, SCHED_FIFO, ¶m)) |
1016 | lbs_pr_err("Error setting scheduler, using default.\n"); | |
1017 | ||
d2b21f19 CM |
1018 | err = request_irq(spi->irq, if_spi_host_interrupt, |
1019 | IRQF_TRIGGER_FALLING, "libertas_spi", card); | |
1020 | if (err) { | |
1021 | lbs_pr_err("can't get host irq line-- request_irq failed\n"); | |
1022 | goto terminate_thread; | |
1023 | } | |
1024 | ||
86c34fe8 AY |
1025 | /* poke the IRQ handler so that we don't miss the first interrupt */ |
1026 | up(&card->spi_ready); | |
1027 | ||
d2b21f19 CM |
1028 | /* Start the card. |
1029 | * This will call register_netdev, and we'll start | |
1030 | * getting interrupts... */ | |
1031 | err = lbs_start_card(priv); | |
1032 | if (err) | |
1033 | goto release_irq; | |
1034 | ||
1035 | lbs_deb_spi("Finished initializing WLAN module.\n"); | |
1036 | ||
1037 | /* successful exit */ | |
1038 | goto out; | |
1039 | ||
1040 | release_irq: | |
1041 | free_irq(spi->irq, card); | |
1042 | terminate_thread: | |
1043 | if_spi_terminate_spi_thread(card); | |
1044 | remove_card: | |
1045 | lbs_remove_card(priv); /* will call free_netdev */ | |
d2b21f19 CM |
1046 | free_card: |
1047 | free_if_spi_card(card); | |
1048 | out: | |
1049 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1050 | return err; | |
1051 | } | |
1052 | ||
1053 | static int __devexit libertas_spi_remove(struct spi_device *spi) | |
1054 | { | |
1055 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1056 | struct lbs_private *priv = card->priv; | |
1057 | ||
1058 | lbs_deb_spi("libertas_spi_remove\n"); | |
1059 | lbs_deb_enter(LBS_DEB_SPI); | |
d2b21f19 CM |
1060 | |
1061 | lbs_stop_card(priv); | |
efcfd1f2 AY |
1062 | lbs_remove_card(priv); /* will call free_netdev */ |
1063 | ||
1064 | priv->surpriseremoved = 1; | |
d2b21f19 CM |
1065 | free_irq(spi->irq, card); |
1066 | if_spi_terminate_spi_thread(card); | |
0c2bec96 MR |
1067 | if (card->pdata->teardown) |
1068 | card->pdata->teardown(spi); | |
d2b21f19 CM |
1069 | free_if_spi_card(card); |
1070 | lbs_deb_leave(LBS_DEB_SPI); | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static struct spi_driver libertas_spi_driver = { | |
1075 | .probe = if_spi_probe, | |
1076 | .remove = __devexit_p(libertas_spi_remove), | |
1077 | .driver = { | |
1078 | .name = "libertas_spi", | |
1079 | .bus = &spi_bus_type, | |
1080 | .owner = THIS_MODULE, | |
1081 | }, | |
1082 | }; | |
1083 | ||
1084 | /* | |
1085 | * Module functions | |
1086 | */ | |
1087 | ||
1088 | static int __init if_spi_init_module(void) | |
1089 | { | |
1090 | int ret = 0; | |
1091 | lbs_deb_enter(LBS_DEB_SPI); | |
1092 | printk(KERN_INFO "libertas_spi: Libertas SPI driver\n"); | |
1093 | ret = spi_register_driver(&libertas_spi_driver); | |
1094 | lbs_deb_leave(LBS_DEB_SPI); | |
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | static void __exit if_spi_exit_module(void) | |
1099 | { | |
1100 | lbs_deb_enter(LBS_DEB_SPI); | |
1101 | spi_unregister_driver(&libertas_spi_driver); | |
1102 | lbs_deb_leave(LBS_DEB_SPI); | |
1103 | } | |
1104 | ||
1105 | module_init(if_spi_init_module); | |
1106 | module_exit(if_spi_exit_module); | |
1107 | ||
1108 | MODULE_DESCRIPTION("Libertas SPI WLAN Driver"); | |
1109 | MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, " | |
1110 | "Colin McCabe <colin@cozybit.com>"); | |
1111 | MODULE_LICENSE("GPL"); | |
e0626e38 | 1112 | MODULE_ALIAS("spi:libertas_spi"); |