Commit | Line | Data |
---|---|---|
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> | |
26 | #include <linux/spi/libertas_spi.h> | |
27 | #include <linux/spi/spi.h> | |
28 | ||
29 | #include "host.h" | |
30 | #include "decl.h" | |
31 | #include "defs.h" | |
32 | #include "dev.h" | |
33 | #include "if_spi.h" | |
34 | ||
35 | struct if_spi_packet { | |
36 | struct list_head list; | |
37 | u16 blen; | |
38 | u8 buffer[0] __attribute__((aligned(4))); | |
39 | }; | |
40 | ||
41 | struct if_spi_card { | |
42 | struct spi_device *spi; | |
43 | struct lbs_private *priv; | |
0c2bec96 | 44 | struct libertas_spi_platform_data *pdata; |
d2b21f19 | 45 | |
cadeba31 JL |
46 | char helper_fw_name[IF_SPI_FW_NAME_MAX]; |
47 | char main_fw_name[IF_SPI_FW_NAME_MAX]; | |
d2b21f19 CM |
48 | |
49 | /* The card ID and card revision, as reported by the hardware. */ | |
50 | u16 card_id; | |
51 | u8 card_rev; | |
52 | ||
d2b21f19 CM |
53 | /* The last time that we initiated an SPU operation */ |
54 | unsigned long prev_xfer_time; | |
55 | ||
56 | int use_dummy_writes; | |
57 | unsigned long spu_port_delay; | |
58 | unsigned long spu_reg_delay; | |
59 | ||
60 | /* Handles all SPI communication (except for FW load) */ | |
61 | struct task_struct *spi_thread; | |
62 | int run_thread; | |
63 | ||
64 | /* Used to wake up the spi_thread */ | |
65 | struct semaphore spi_ready; | |
66 | struct semaphore spi_thread_terminated; | |
67 | ||
68 | u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE]; | |
69 | ||
70 | /* A buffer of incoming packets from libertas core. | |
71 | * Since we can't sleep in hw_host_to_card, we have to buffer | |
72 | * them. */ | |
73 | struct list_head cmd_packet_list; | |
74 | struct list_head data_packet_list; | |
75 | ||
76 | /* Protects cmd_packet_list and data_packet_list */ | |
77 | spinlock_t buffer_lock; | |
78 | }; | |
79 | ||
80 | static void free_if_spi_card(struct if_spi_card *card) | |
81 | { | |
82 | struct list_head *cursor, *next; | |
83 | struct if_spi_packet *packet; | |
84 | ||
85 | BUG_ON(card->run_thread); | |
86 | list_for_each_safe(cursor, next, &card->cmd_packet_list) { | |
87 | packet = container_of(cursor, struct if_spi_packet, list); | |
88 | list_del(&packet->list); | |
89 | kfree(packet); | |
90 | } | |
91 | list_for_each_safe(cursor, next, &card->data_packet_list) { | |
92 | packet = container_of(cursor, struct if_spi_packet, list); | |
93 | list_del(&packet->list); | |
94 | kfree(packet); | |
95 | } | |
96 | spi_set_drvdata(card->spi, NULL); | |
97 | kfree(card); | |
98 | } | |
99 | ||
100 | static struct chip_ident chip_id_to_device_name[] = { | |
101 | { .chip_id = 0x04, .name = 8385 }, | |
102 | { .chip_id = 0x0b, .name = 8686 }, | |
103 | }; | |
104 | ||
105 | /* | |
106 | * SPI Interface Unit Routines | |
107 | * | |
108 | * The SPU sits between the host and the WLAN module. | |
109 | * All communication with the firmware is through SPU transactions. | |
110 | * | |
111 | * First we have to put a SPU register name on the bus. Then we can | |
112 | * either read from or write to that register. | |
113 | * | |
d2b21f19 CM |
114 | */ |
115 | ||
116 | static void spu_transaction_init(struct if_spi_card *card) | |
117 | { | |
118 | if (!time_after(jiffies, card->prev_xfer_time + 1)) { | |
119 | /* Unfortunately, the SPU requires a delay between successive | |
120 | * transactions. If our last transaction was more than a jiffy | |
121 | * ago, we have obviously already delayed enough. | |
122 | * If not, we have to busy-wait to be on the safe side. */ | |
123 | ndelay(400); | |
124 | } | |
d2b21f19 CM |
125 | } |
126 | ||
127 | static void spu_transaction_finish(struct if_spi_card *card) | |
128 | { | |
d2b21f19 CM |
129 | card->prev_xfer_time = jiffies; |
130 | } | |
131 | ||
132 | /* Write out a byte buffer to an SPI register, | |
133 | * using a series of 16-bit transfers. */ | |
134 | static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) | |
135 | { | |
136 | int err = 0; | |
f488b72d | 137 | u16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK); |
4d1d4985 SAS |
138 | struct spi_message m; |
139 | struct spi_transfer reg_trans; | |
140 | struct spi_transfer data_trans; | |
141 | ||
142 | spi_message_init(&m); | |
143 | memset(®_trans, 0, sizeof(reg_trans)); | |
144 | memset(&data_trans, 0, sizeof(data_trans)); | |
d2b21f19 CM |
145 | |
146 | /* You must give an even number of bytes to the SPU, even if it | |
147 | * doesn't care about the last one. */ | |
148 | BUG_ON(len & 0x1); | |
149 | ||
150 | spu_transaction_init(card); | |
151 | ||
152 | /* write SPU register index */ | |
4d1d4985 SAS |
153 | reg_trans.tx_buf = ®_out; |
154 | reg_trans.len = sizeof(reg_out); | |
d2b21f19 | 155 | |
4d1d4985 SAS |
156 | data_trans.tx_buf = buf; |
157 | data_trans.len = len; | |
d2b21f19 | 158 | |
4d1d4985 SAS |
159 | spi_message_add_tail(®_trans, &m); |
160 | spi_message_add_tail(&data_trans, &m); | |
161 | ||
162 | err = spi_sync(card->spi, &m); | |
d2b21f19 CM |
163 | spu_transaction_finish(card); |
164 | return err; | |
165 | } | |
166 | ||
167 | static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val) | |
168 | { | |
f488b72d | 169 | u16 buff; |
d2b21f19 | 170 | |
f488b72d SAS |
171 | buff = cpu_to_le16(val); |
172 | return spu_write(card, reg, (u8 *)&buff, sizeof(u16)); | |
d2b21f19 CM |
173 | } |
174 | ||
175 | static inline int spu_reg_is_port_reg(u16 reg) | |
176 | { | |
177 | switch (reg) { | |
178 | case IF_SPI_IO_RDWRPORT_REG: | |
179 | case IF_SPI_CMD_RDWRPORT_REG: | |
180 | case IF_SPI_DATA_RDWRPORT_REG: | |
181 | return 1; | |
182 | default: | |
183 | return 0; | |
184 | } | |
185 | } | |
186 | ||
187 | static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len) | |
188 | { | |
4d1d4985 | 189 | unsigned int delay; |
d2b21f19 | 190 | int err = 0; |
f488b72d | 191 | u16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK); |
4d1d4985 SAS |
192 | struct spi_message m; |
193 | struct spi_transfer reg_trans; | |
194 | struct spi_transfer dummy_trans; | |
195 | struct spi_transfer data_trans; | |
d2b21f19 CM |
196 | |
197 | /* You must take an even number of bytes from the SPU, even if you | |
198 | * don't care about the last one. */ | |
199 | BUG_ON(len & 0x1); | |
200 | ||
201 | spu_transaction_init(card); | |
202 | ||
4d1d4985 SAS |
203 | spi_message_init(&m); |
204 | memset(®_trans, 0, sizeof(reg_trans)); | |
205 | memset(&dummy_trans, 0, sizeof(dummy_trans)); | |
206 | memset(&data_trans, 0, sizeof(data_trans)); | |
207 | ||
d2b21f19 | 208 | /* write SPU register index */ |
4d1d4985 SAS |
209 | reg_trans.tx_buf = ®_out; |
210 | reg_trans.len = sizeof(reg_out); | |
211 | spi_message_add_tail(®_trans, &m); | |
d2b21f19 CM |
212 | |
213 | delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay : | |
214 | card->spu_reg_delay; | |
215 | if (card->use_dummy_writes) { | |
216 | /* Clock in dummy cycles while the SPU fills the FIFO */ | |
4d1d4985 SAS |
217 | dummy_trans.len = delay / 8; |
218 | spi_message_add_tail(&dummy_trans, &m); | |
d2b21f19 CM |
219 | } else { |
220 | /* Busy-wait while the SPU fills the FIFO */ | |
4d1d4985 SAS |
221 | reg_trans.delay_usecs = |
222 | DIV_ROUND_UP((100 + (delay * 10)), 1000); | |
d2b21f19 CM |
223 | } |
224 | ||
225 | /* read in data */ | |
4d1d4985 SAS |
226 | data_trans.rx_buf = buf; |
227 | data_trans.len = len; | |
228 | spi_message_add_tail(&data_trans, &m); | |
d2b21f19 | 229 | |
4d1d4985 | 230 | err = spi_sync(card->spi, &m); |
d2b21f19 CM |
231 | spu_transaction_finish(card); |
232 | return err; | |
233 | } | |
234 | ||
235 | /* Read 16 bits from an SPI register */ | |
236 | static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val) | |
237 | { | |
f488b72d SAS |
238 | u16 buf; |
239 | int ret; | |
240 | ||
241 | ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
242 | if (ret == 0) | |
243 | *val = le16_to_cpup(&buf); | |
244 | return ret; | |
d2b21f19 CM |
245 | } |
246 | ||
247 | /* Read 32 bits from an SPI register. | |
248 | * The low 16 bits are read first. */ | |
249 | static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val) | |
250 | { | |
f488b72d | 251 | u32 buf; |
d2b21f19 | 252 | int err; |
f488b72d SAS |
253 | |
254 | err = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
d2b21f19 | 255 | if (!err) |
f488b72d | 256 | *val = le32_to_cpup(&buf); |
d2b21f19 CM |
257 | return err; |
258 | } | |
259 | ||
260 | /* Keep reading 16 bits from an SPI register until you get the correct result. | |
261 | * | |
262 | * If mask = 0, the correct result is any non-zero number. | |
263 | * If mask != 0, the correct result is any number where | |
264 | * number & target_mask == target | |
265 | * | |
266 | * Returns -ETIMEDOUT if a second passes without the correct result. */ | |
267 | static int spu_wait_for_u16(struct if_spi_card *card, u16 reg, | |
268 | u16 target_mask, u16 target) | |
269 | { | |
270 | int err; | |
271 | unsigned long timeout = jiffies + 5*HZ; | |
272 | while (1) { | |
273 | u16 val; | |
274 | err = spu_read_u16(card, reg, &val); | |
275 | if (err) | |
276 | return err; | |
277 | if (target_mask) { | |
278 | if ((val & target_mask) == target) | |
279 | return 0; | |
280 | } else { | |
281 | if (val) | |
282 | return 0; | |
283 | } | |
284 | udelay(100); | |
285 | if (time_after(jiffies, timeout)) { | |
286 | lbs_pr_err("%s: timeout with val=%02x, " | |
287 | "target_mask=%02x, target=%02x\n", | |
288 | __func__, val, target_mask, target); | |
289 | return -ETIMEDOUT; | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | /* Read 16 bits from an SPI register until you receive a specific value. | |
295 | * Returns -ETIMEDOUT if a 4 tries pass without success. */ | |
296 | static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target) | |
297 | { | |
298 | int err, try; | |
299 | for (try = 0; try < 4; ++try) { | |
300 | u32 val = 0; | |
301 | err = spu_read_u32(card, reg, &val); | |
302 | if (err) | |
303 | return err; | |
304 | if (val == target) | |
305 | return 0; | |
306 | mdelay(100); | |
307 | } | |
308 | return -ETIMEDOUT; | |
309 | } | |
310 | ||
311 | static int spu_set_interrupt_mode(struct if_spi_card *card, | |
312 | int suppress_host_int, | |
313 | int auto_int) | |
314 | { | |
315 | int err = 0; | |
316 | ||
317 | /* We can suppress a host interrupt by clearing the appropriate | |
318 | * bit in the "host interrupt status mask" register */ | |
319 | if (suppress_host_int) { | |
320 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
321 | if (err) | |
322 | return err; | |
323 | } else { | |
324 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, | |
325 | IF_SPI_HISM_TX_DOWNLOAD_RDY | | |
326 | IF_SPI_HISM_RX_UPLOAD_RDY | | |
327 | IF_SPI_HISM_CMD_DOWNLOAD_RDY | | |
328 | IF_SPI_HISM_CARDEVENT | | |
329 | IF_SPI_HISM_CMD_UPLOAD_RDY); | |
330 | if (err) | |
331 | return err; | |
332 | } | |
333 | ||
334 | /* If auto-interrupts are on, the completion of certain transactions | |
335 | * will trigger an interrupt automatically. If auto-interrupts | |
336 | * are off, we need to set the "Card Interrupt Cause" register to | |
337 | * trigger a card interrupt. */ | |
338 | if (auto_int) { | |
339 | err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG, | |
340 | IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO | | |
341 | IF_SPI_HICT_RX_UPLOAD_OVER_AUTO | | |
342 | IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO | | |
343 | IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO); | |
344 | if (err) | |
345 | return err; | |
346 | } else { | |
347 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
348 | if (err) | |
349 | return err; | |
350 | } | |
351 | return err; | |
352 | } | |
353 | ||
354 | static int spu_get_chip_revision(struct if_spi_card *card, | |
355 | u16 *card_id, u8 *card_rev) | |
356 | { | |
357 | int err = 0; | |
358 | u32 dev_ctrl; | |
359 | err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl); | |
360 | if (err) | |
361 | return err; | |
362 | *card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl); | |
363 | *card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl); | |
364 | return err; | |
365 | } | |
366 | ||
367 | static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) | |
368 | { | |
369 | int err = 0; | |
370 | u16 rval; | |
371 | /* set bus mode */ | |
372 | err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode); | |
373 | if (err) | |
374 | return err; | |
375 | /* Check that we were able to read back what we just wrote. */ | |
376 | err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); | |
377 | if (err) | |
378 | return err; | |
88d89526 | 379 | if ((rval & 0xF) != mode) { |
d2b21f19 CM |
380 | lbs_pr_err("Can't read bus mode register.\n"); |
381 | return -EIO; | |
382 | } | |
383 | return 0; | |
384 | } | |
385 | ||
386 | static int spu_init(struct if_spi_card *card, int use_dummy_writes) | |
387 | { | |
388 | int err = 0; | |
389 | u32 delay; | |
390 | ||
391 | /* We have to start up in timed delay mode so that we can safely | |
392 | * read the Delay Read Register. */ | |
393 | card->use_dummy_writes = 0; | |
394 | err = spu_set_bus_mode(card, | |
395 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
396 | IF_SPI_BUS_MODE_DELAY_METHOD_TIMED | | |
397 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
398 | if (err) | |
399 | return err; | |
400 | card->spu_port_delay = 1000; | |
401 | card->spu_reg_delay = 1000; | |
402 | err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay); | |
403 | if (err) | |
404 | return err; | |
405 | card->spu_port_delay = delay & 0x0000ffff; | |
406 | card->spu_reg_delay = (delay & 0xffff0000) >> 16; | |
407 | ||
408 | /* If dummy clock delay mode has been requested, switch to it now */ | |
409 | if (use_dummy_writes) { | |
410 | card->use_dummy_writes = 1; | |
411 | err = spu_set_bus_mode(card, | |
412 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
413 | IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK | | |
414 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
415 | if (err) | |
416 | return err; | |
417 | } | |
418 | ||
419 | lbs_deb_spi("Initialized SPU unit. " | |
420 | "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n", | |
421 | card->spu_port_delay, card->spu_reg_delay); | |
422 | return err; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Firmware Loading | |
427 | */ | |
428 | ||
429 | static int if_spi_prog_helper_firmware(struct if_spi_card *card) | |
430 | { | |
431 | int err = 0; | |
432 | const struct firmware *firmware = NULL; | |
433 | int bytes_remaining; | |
434 | const u8 *fw; | |
435 | u8 temp[HELPER_FW_LOAD_CHUNK_SZ]; | |
436 | struct spi_device *spi = card->spi; | |
437 | ||
438 | lbs_deb_enter(LBS_DEB_SPI); | |
439 | ||
440 | err = spu_set_interrupt_mode(card, 1, 0); | |
441 | if (err) | |
442 | goto out; | |
443 | /* Get helper firmware image */ | |
444 | err = request_firmware(&firmware, card->helper_fw_name, &spi->dev); | |
445 | if (err) { | |
446 | lbs_pr_err("request_firmware failed with err = %d\n", err); | |
447 | goto out; | |
448 | } | |
449 | bytes_remaining = firmware->size; | |
450 | fw = firmware->data; | |
451 | ||
452 | /* Load helper firmware image */ | |
453 | while (bytes_remaining > 0) { | |
454 | /* Scratch pad 1 should contain the number of bytes we | |
455 | * want to download to the firmware */ | |
456 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, | |
457 | HELPER_FW_LOAD_CHUNK_SZ); | |
458 | if (err) | |
459 | goto release_firmware; | |
460 | ||
461 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
462 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
463 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
464 | if (err) | |
465 | goto release_firmware; | |
466 | ||
467 | /* Feed the data into the command read/write port reg | |
468 | * in chunks of 64 bytes */ | |
469 | memset(temp, 0, sizeof(temp)); | |
470 | memcpy(temp, fw, | |
471 | min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ)); | |
472 | mdelay(10); | |
473 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
474 | temp, HELPER_FW_LOAD_CHUNK_SZ); | |
475 | if (err) | |
476 | goto release_firmware; | |
477 | ||
478 | /* Interrupt the boot code */ | |
479 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
480 | if (err) | |
481 | goto release_firmware; | |
482 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, | |
483 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
484 | if (err) | |
485 | goto release_firmware; | |
486 | bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ; | |
487 | fw += HELPER_FW_LOAD_CHUNK_SZ; | |
488 | } | |
489 | ||
490 | /* Once the helper / single stage firmware download is complete, | |
491 | * write 0 to scratch pad 1 and interrupt the | |
492 | * bootloader. This completes the helper download. */ | |
493 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK); | |
494 | if (err) | |
495 | goto release_firmware; | |
496 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
497 | if (err) | |
498 | goto release_firmware; | |
499 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, | |
500 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
501 | goto release_firmware; | |
502 | ||
503 | lbs_deb_spi("waiting for helper to boot...\n"); | |
504 | ||
505 | release_firmware: | |
506 | release_firmware(firmware); | |
507 | out: | |
508 | if (err) | |
509 | lbs_pr_err("failed to load helper firmware (err=%d)\n", err); | |
510 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
511 | return err; | |
512 | } | |
513 | ||
514 | /* Returns the length of the next packet the firmware expects us to send | |
515 | * Sets crc_err if the previous transfer had a CRC error. */ | |
516 | static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card, | |
517 | int *crc_err) | |
518 | { | |
519 | u16 len; | |
520 | int err = 0; | |
521 | ||
522 | /* wait until the host interrupt status register indicates | |
523 | * that we are ready to download */ | |
524 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
525 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
526 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
527 | if (err) { | |
528 | lbs_pr_err("timed out waiting for host_int_status\n"); | |
529 | return err; | |
530 | } | |
531 | ||
532 | /* Ask the device how many bytes of firmware it wants. */ | |
533 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
534 | if (err) | |
535 | return err; | |
536 | ||
537 | if (len > IF_SPI_CMD_BUF_SIZE) { | |
538 | lbs_pr_err("firmware load device requested a larger " | |
539 | "tranfer than we are prepared to " | |
540 | "handle. (len = %d)\n", len); | |
541 | return -EIO; | |
542 | } | |
543 | if (len & 0x1) { | |
544 | lbs_deb_spi("%s: crc error\n", __func__); | |
545 | len &= ~0x1; | |
546 | *crc_err = 1; | |
547 | } else | |
548 | *crc_err = 0; | |
549 | ||
550 | return len; | |
551 | } | |
552 | ||
553 | static int if_spi_prog_main_firmware(struct if_spi_card *card) | |
554 | { | |
555 | int len, prev_len; | |
556 | int bytes, crc_err = 0, err = 0; | |
557 | const struct firmware *firmware = NULL; | |
558 | const u8 *fw; | |
559 | struct spi_device *spi = card->spi; | |
560 | u16 num_crc_errs; | |
561 | ||
562 | lbs_deb_enter(LBS_DEB_SPI); | |
563 | ||
564 | err = spu_set_interrupt_mode(card, 1, 0); | |
565 | if (err) | |
566 | goto out; | |
567 | ||
568 | /* Get firmware image */ | |
569 | err = request_firmware(&firmware, card->main_fw_name, &spi->dev); | |
570 | if (err) { | |
571 | lbs_pr_err("%s: can't get firmware '%s' from kernel. " | |
572 | "err = %d\n", __func__, card->main_fw_name, err); | |
573 | goto out; | |
574 | } | |
575 | ||
576 | err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0); | |
577 | if (err) { | |
578 | lbs_pr_err("%s: timed out waiting for initial " | |
579 | "scratch reg = 0\n", __func__); | |
580 | goto release_firmware; | |
581 | } | |
582 | ||
583 | num_crc_errs = 0; | |
584 | prev_len = 0; | |
585 | bytes = firmware->size; | |
586 | fw = firmware->data; | |
587 | while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) { | |
588 | if (len < 0) { | |
589 | err = len; | |
590 | goto release_firmware; | |
591 | } | |
592 | if (bytes < 0) { | |
593 | /* If there are no more bytes left, we would normally | |
594 | * expect to have terminated with len = 0 */ | |
595 | lbs_pr_err("Firmware load wants more bytes " | |
596 | "than we have to offer.\n"); | |
597 | break; | |
598 | } | |
599 | if (crc_err) { | |
600 | /* Previous transfer failed. */ | |
601 | if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) { | |
602 | lbs_pr_err("Too many CRC errors encountered " | |
603 | "in firmware load.\n"); | |
604 | err = -EIO; | |
605 | goto release_firmware; | |
606 | } | |
607 | } else { | |
608 | /* Previous transfer succeeded. Advance counters. */ | |
609 | bytes -= prev_len; | |
610 | fw += prev_len; | |
611 | } | |
612 | if (bytes < len) { | |
613 | memset(card->cmd_buffer, 0, len); | |
614 | memcpy(card->cmd_buffer, fw, bytes); | |
615 | } else | |
616 | memcpy(card->cmd_buffer, fw, len); | |
617 | ||
618 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
619 | if (err) | |
620 | goto release_firmware; | |
621 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
622 | card->cmd_buffer, len); | |
623 | if (err) | |
624 | goto release_firmware; | |
625 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG , | |
626 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
627 | if (err) | |
628 | goto release_firmware; | |
629 | prev_len = len; | |
630 | } | |
631 | if (bytes > prev_len) { | |
632 | lbs_pr_err("firmware load wants fewer bytes than " | |
633 | "we have to offer.\n"); | |
634 | } | |
635 | ||
636 | /* Confirm firmware download */ | |
637 | err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG, | |
638 | SUCCESSFUL_FW_DOWNLOAD_MAGIC); | |
639 | if (err) { | |
640 | lbs_pr_err("failed to confirm the firmware download\n"); | |
641 | goto release_firmware; | |
642 | } | |
643 | ||
644 | release_firmware: | |
645 | release_firmware(firmware); | |
646 | ||
647 | out: | |
648 | if (err) | |
649 | lbs_pr_err("failed to load firmware (err=%d)\n", err); | |
650 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
651 | return err; | |
652 | } | |
653 | ||
654 | /* | |
655 | * SPI Transfer Thread | |
656 | * | |
657 | * The SPI thread handles all SPI transfers, so there is no need for a lock. | |
658 | */ | |
659 | ||
660 | /* Move a command from the card to the host */ | |
661 | static int if_spi_c2h_cmd(struct if_spi_card *card) | |
662 | { | |
663 | struct lbs_private *priv = card->priv; | |
664 | unsigned long flags; | |
665 | int err = 0; | |
666 | u16 len; | |
667 | u8 i; | |
668 | ||
669 | /* We need a buffer big enough to handle whatever people send to | |
670 | * hw_host_to_card */ | |
671 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE); | |
672 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE); | |
673 | ||
674 | /* It's just annoying if the buffer size isn't a multiple of 4, because | |
675 | * then we might have len < IF_SPI_CMD_BUF_SIZE but | |
676 | * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE */ | |
677 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0); | |
678 | ||
679 | lbs_deb_enter(LBS_DEB_SPI); | |
680 | ||
681 | /* How many bytes are there to read? */ | |
682 | err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len); | |
683 | if (err) | |
684 | goto out; | |
685 | if (!len) { | |
686 | lbs_pr_err("%s: error: card has no data for host\n", | |
687 | __func__); | |
688 | err = -EINVAL; | |
689 | goto out; | |
690 | } else if (len > IF_SPI_CMD_BUF_SIZE) { | |
691 | lbs_pr_err("%s: error: response packet too large: " | |
692 | "%d bytes, but maximum is %d\n", | |
693 | __func__, len, IF_SPI_CMD_BUF_SIZE); | |
694 | err = -EINVAL; | |
695 | goto out; | |
696 | } | |
697 | ||
698 | /* Read the data from the WLAN module into our command buffer */ | |
699 | err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG, | |
700 | card->cmd_buffer, ALIGN(len, 4)); | |
701 | if (err) | |
702 | goto out; | |
703 | ||
704 | spin_lock_irqsave(&priv->driver_lock, flags); | |
705 | i = (priv->resp_idx == 0) ? 1 : 0; | |
706 | BUG_ON(priv->resp_len[i]); | |
707 | priv->resp_len[i] = len; | |
708 | memcpy(priv->resp_buf[i], card->cmd_buffer, len); | |
709 | lbs_notify_command_response(priv, i); | |
710 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
711 | ||
712 | out: | |
713 | if (err) | |
714 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
715 | lbs_deb_leave(LBS_DEB_SPI); | |
716 | return err; | |
717 | } | |
718 | ||
719 | /* Move data from the card to the host */ | |
720 | static int if_spi_c2h_data(struct if_spi_card *card) | |
721 | { | |
722 | struct sk_buff *skb; | |
723 | char *data; | |
724 | u16 len; | |
725 | int err = 0; | |
726 | ||
727 | lbs_deb_enter(LBS_DEB_SPI); | |
728 | ||
729 | /* How many bytes are there to read? */ | |
730 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
731 | if (err) | |
732 | goto out; | |
733 | if (!len) { | |
734 | lbs_pr_err("%s: error: card has no data for host\n", | |
735 | __func__); | |
736 | err = -EINVAL; | |
737 | goto out; | |
738 | } else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
739 | lbs_pr_err("%s: error: card has %d bytes of data, but " | |
efcfd1f2 | 740 | "our maximum skb size is %zu\n", |
d2b21f19 CM |
741 | __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); |
742 | err = -EINVAL; | |
743 | goto out; | |
744 | } | |
745 | ||
746 | /* TODO: should we allocate a smaller skb if we have less data? */ | |
747 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
748 | if (!skb) { | |
749 | err = -ENOBUFS; | |
750 | goto out; | |
751 | } | |
752 | skb_reserve(skb, IPFIELD_ALIGN_OFFSET); | |
753 | data = skb_put(skb, len); | |
754 | ||
755 | /* Read the data from the WLAN module into our skb... */ | |
756 | err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); | |
757 | if (err) | |
758 | goto free_skb; | |
759 | ||
760 | /* pass the SKB to libertas */ | |
761 | err = lbs_process_rxed_packet(card->priv, skb); | |
762 | if (err) | |
763 | goto free_skb; | |
764 | ||
765 | /* success */ | |
766 | goto out; | |
767 | ||
768 | free_skb: | |
769 | dev_kfree_skb(skb); | |
770 | out: | |
771 | if (err) | |
772 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
773 | lbs_deb_leave(LBS_DEB_SPI); | |
774 | return err; | |
775 | } | |
776 | ||
777 | /* Move data or a command from the host to the card. */ | |
778 | static void if_spi_h2c(struct if_spi_card *card, | |
779 | struct if_spi_packet *packet, int type) | |
780 | { | |
781 | int err = 0; | |
782 | u16 int_type, port_reg; | |
783 | ||
784 | switch (type) { | |
785 | case MVMS_DAT: | |
786 | int_type = IF_SPI_CIC_TX_DOWNLOAD_OVER; | |
787 | port_reg = IF_SPI_DATA_RDWRPORT_REG; | |
788 | break; | |
789 | case MVMS_CMD: | |
790 | int_type = IF_SPI_CIC_CMD_DOWNLOAD_OVER; | |
791 | port_reg = IF_SPI_CMD_RDWRPORT_REG; | |
792 | break; | |
793 | default: | |
794 | lbs_pr_err("can't transfer buffer of type %d\n", type); | |
795 | err = -EINVAL; | |
796 | goto out; | |
797 | } | |
798 | ||
799 | /* Write the data to the card */ | |
800 | err = spu_write(card, port_reg, packet->buffer, packet->blen); | |
801 | if (err) | |
802 | goto out; | |
803 | ||
804 | out: | |
805 | kfree(packet); | |
806 | ||
807 | if (err) | |
808 | lbs_pr_err("%s: error %d\n", __func__, err); | |
809 | } | |
810 | ||
811 | /* Inform the host about a card event */ | |
812 | static void if_spi_e2h(struct if_spi_card *card) | |
813 | { | |
814 | int err = 0; | |
d2b21f19 CM |
815 | u32 cause; |
816 | struct lbs_private *priv = card->priv; | |
817 | ||
818 | err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause); | |
819 | if (err) | |
820 | goto out; | |
821 | ||
ea2d0639 | 822 | /* re-enable the card event interrupt */ |
823 | spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
824 | ~IF_SPI_HICU_CARD_EVENT); | |
825 | ||
826 | /* generate a card interrupt */ | |
827 | spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT); | |
828 | ||
d2b21f19 | 829 | lbs_queue_event(priv, cause & 0xff); |
d2b21f19 CM |
830 | out: |
831 | if (err) | |
832 | lbs_pr_err("%s: error %d\n", __func__, err); | |
833 | } | |
834 | ||
835 | static int lbs_spi_thread(void *data) | |
836 | { | |
837 | int err; | |
838 | struct if_spi_card *card = data; | |
839 | u16 hiStatus; | |
840 | unsigned long flags; | |
841 | struct if_spi_packet *packet; | |
842 | ||
843 | while (1) { | |
844 | /* Wait to be woken up by one of two things. First, our ISR | |
845 | * could tell us that something happened on the WLAN. | |
846 | * Secondly, libertas could call hw_host_to_card with more | |
847 | * data, which we might be able to send. | |
848 | */ | |
849 | do { | |
850 | err = down_interruptible(&card->spi_ready); | |
851 | if (!card->run_thread) { | |
852 | up(&card->spi_thread_terminated); | |
853 | do_exit(0); | |
854 | } | |
855 | } while (err == EINTR); | |
856 | ||
857 | /* Read the host interrupt status register to see what we | |
858 | * can do. */ | |
859 | err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
860 | &hiStatus); | |
861 | if (err) { | |
862 | lbs_pr_err("I/O error\n"); | |
863 | goto err; | |
864 | } | |
865 | ||
866 | if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) | |
867 | err = if_spi_c2h_cmd(card); | |
868 | if (err) | |
869 | goto err; | |
870 | if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) | |
871 | err = if_spi_c2h_data(card); | |
872 | if (err) | |
873 | goto err; | |
b3781c74 AY |
874 | |
875 | /* workaround: in PS mode, the card does not set the Command | |
876 | * Download Ready bit, but it sets TX Download Ready. */ | |
877 | if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY || | |
878 | (card->priv->psstate != PS_STATE_FULL_POWER && | |
879 | (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) { | |
d2b21f19 CM |
880 | /* This means two things. First of all, |
881 | * if there was a previous command sent, the card has | |
882 | * successfully received it. | |
883 | * Secondly, it is now ready to download another | |
884 | * command. | |
885 | */ | |
886 | lbs_host_to_card_done(card->priv); | |
887 | ||
888 | /* Do we have any command packets from the host to | |
889 | * send? */ | |
890 | packet = NULL; | |
891 | spin_lock_irqsave(&card->buffer_lock, flags); | |
892 | if (!list_empty(&card->cmd_packet_list)) { | |
893 | packet = (struct if_spi_packet *)(card-> | |
894 | cmd_packet_list.next); | |
895 | list_del(&packet->list); | |
896 | } | |
897 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
898 | ||
899 | if (packet) | |
900 | if_spi_h2c(card, packet, MVMS_CMD); | |
901 | } | |
902 | if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) { | |
903 | /* Do we have any data packets from the host to | |
904 | * send? */ | |
905 | packet = NULL; | |
906 | spin_lock_irqsave(&card->buffer_lock, flags); | |
907 | if (!list_empty(&card->data_packet_list)) { | |
908 | packet = (struct if_spi_packet *)(card-> | |
909 | data_packet_list.next); | |
910 | list_del(&packet->list); | |
911 | } | |
912 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
913 | ||
914 | if (packet) | |
915 | if_spi_h2c(card, packet, MVMS_DAT); | |
916 | } | |
917 | if (hiStatus & IF_SPI_HIST_CARD_EVENT) | |
918 | if_spi_e2h(card); | |
919 | ||
920 | err: | |
921 | if (err) | |
922 | lbs_pr_err("%s: got error %d\n", __func__, err); | |
923 | } | |
924 | } | |
925 | ||
926 | /* Block until lbs_spi_thread thread has terminated */ | |
927 | static void if_spi_terminate_spi_thread(struct if_spi_card *card) | |
928 | { | |
929 | /* It would be nice to use kthread_stop here, but that function | |
930 | * can't wake threads waiting for a semaphore. */ | |
931 | card->run_thread = 0; | |
932 | up(&card->spi_ready); | |
933 | down(&card->spi_thread_terminated); | |
934 | } | |
935 | ||
936 | /* | |
937 | * Host to Card | |
938 | * | |
939 | * Called from Libertas to transfer some data to the WLAN device | |
940 | * We can't sleep here. */ | |
941 | static int if_spi_host_to_card(struct lbs_private *priv, | |
942 | u8 type, u8 *buf, u16 nb) | |
943 | { | |
944 | int err = 0; | |
945 | unsigned long flags; | |
946 | struct if_spi_card *card = priv->card; | |
947 | struct if_spi_packet *packet; | |
948 | u16 blen; | |
949 | ||
950 | lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb); | |
951 | ||
952 | if (nb == 0) { | |
953 | lbs_pr_err("%s: invalid size requested: %d\n", __func__, nb); | |
954 | err = -EINVAL; | |
955 | goto out; | |
956 | } | |
957 | blen = ALIGN(nb, 4); | |
958 | packet = kzalloc(sizeof(struct if_spi_packet) + blen, GFP_ATOMIC); | |
959 | if (!packet) { | |
960 | err = -ENOMEM; | |
961 | goto out; | |
962 | } | |
963 | packet->blen = blen; | |
964 | memcpy(packet->buffer, buf, nb); | |
965 | memset(packet->buffer + nb, 0, blen - nb); | |
966 | ||
967 | switch (type) { | |
968 | case MVMS_CMD: | |
969 | priv->dnld_sent = DNLD_CMD_SENT; | |
970 | spin_lock_irqsave(&card->buffer_lock, flags); | |
971 | list_add_tail(&packet->list, &card->cmd_packet_list); | |
972 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
973 | break; | |
974 | case MVMS_DAT: | |
975 | priv->dnld_sent = DNLD_DATA_SENT; | |
976 | spin_lock_irqsave(&card->buffer_lock, flags); | |
977 | list_add_tail(&packet->list, &card->data_packet_list); | |
978 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
979 | break; | |
980 | default: | |
981 | lbs_pr_err("can't transfer buffer of type %d", type); | |
982 | err = -EINVAL; | |
983 | break; | |
984 | } | |
985 | ||
986 | /* Wake up the spi thread */ | |
987 | up(&card->spi_ready); | |
988 | out: | |
989 | lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err); | |
990 | return err; | |
991 | } | |
992 | ||
993 | /* | |
994 | * Host Interrupts | |
995 | * | |
996 | * Service incoming interrupts from the WLAN device. We can't sleep here, so | |
997 | * don't try to talk on the SPI bus, just wake up the SPI thread. | |
998 | */ | |
999 | static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id) | |
1000 | { | |
1001 | struct if_spi_card *card = dev_id; | |
1002 | ||
1003 | up(&card->spi_ready); | |
1004 | return IRQ_HANDLED; | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * SPI callbacks | |
1009 | */ | |
1010 | ||
1011 | static int if_spi_calculate_fw_names(u16 card_id, | |
1012 | char *helper_fw, char *main_fw) | |
1013 | { | |
1014 | int i; | |
1015 | for (i = 0; i < ARRAY_SIZE(chip_id_to_device_name); ++i) { | |
1016 | if (card_id == chip_id_to_device_name[i].chip_id) | |
1017 | break; | |
1018 | } | |
1019 | if (i == ARRAY_SIZE(chip_id_to_device_name)) { | |
1020 | lbs_pr_err("Unsupported chip_id: 0x%02x\n", card_id); | |
1021 | return -EAFNOSUPPORT; | |
1022 | } | |
cadeba31 | 1023 | snprintf(helper_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d_hlp.bin", |
d2b21f19 | 1024 | chip_id_to_device_name[i].name); |
cadeba31 | 1025 | snprintf(main_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d.bin", |
d2b21f19 CM |
1026 | chip_id_to_device_name[i].name); |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static int __devinit if_spi_probe(struct spi_device *spi) | |
1031 | { | |
1032 | struct if_spi_card *card; | |
1033 | struct lbs_private *priv = NULL; | |
1034 | struct libertas_spi_platform_data *pdata = spi->dev.platform_data; | |
1035 | int err = 0; | |
1036 | u32 scratch; | |
b26ed97c | 1037 | struct sched_param param = { .sched_priority = 1 }; |
d2b21f19 CM |
1038 | |
1039 | lbs_deb_enter(LBS_DEB_SPI); | |
1040 | ||
0c2bec96 MR |
1041 | if (!pdata) { |
1042 | err = -EINVAL; | |
1043 | goto out; | |
1044 | } | |
1045 | ||
1046 | if (pdata->setup) { | |
1047 | err = pdata->setup(spi); | |
1048 | if (err) | |
1049 | goto out; | |
1050 | } | |
1051 | ||
d2b21f19 CM |
1052 | /* Allocate card structure to represent this specific device */ |
1053 | card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL); | |
1054 | if (!card) { | |
1055 | err = -ENOMEM; | |
1056 | goto out; | |
1057 | } | |
1058 | spi_set_drvdata(spi, card); | |
0c2bec96 | 1059 | card->pdata = pdata; |
d2b21f19 | 1060 | card->spi = spi; |
d2b21f19 CM |
1061 | card->prev_xfer_time = jiffies; |
1062 | ||
1063 | sema_init(&card->spi_ready, 0); | |
1064 | sema_init(&card->spi_thread_terminated, 0); | |
1065 | INIT_LIST_HEAD(&card->cmd_packet_list); | |
1066 | INIT_LIST_HEAD(&card->data_packet_list); | |
1067 | spin_lock_init(&card->buffer_lock); | |
1068 | ||
d2b21f19 CM |
1069 | /* Initialize the SPI Interface Unit */ |
1070 | err = spu_init(card, pdata->use_dummy_writes); | |
1071 | if (err) | |
4d1d4985 | 1072 | goto free_card; |
d2b21f19 CM |
1073 | err = spu_get_chip_revision(card, &card->card_id, &card->card_rev); |
1074 | if (err) | |
4d1d4985 | 1075 | goto free_card; |
d2b21f19 CM |
1076 | |
1077 | /* Firmware load */ | |
1078 | err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch); | |
1079 | if (err) | |
4d1d4985 | 1080 | goto free_card; |
d2b21f19 CM |
1081 | if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC) |
1082 | lbs_deb_spi("Firmware is already loaded for " | |
1083 | "Marvell WLAN 802.11 adapter\n"); | |
1084 | else { | |
1085 | err = if_spi_calculate_fw_names(card->card_id, | |
1086 | card->helper_fw_name, card->main_fw_name); | |
1087 | if (err) | |
4d1d4985 | 1088 | goto free_card; |
d2b21f19 CM |
1089 | |
1090 | lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter " | |
1091 | "(chip_id = 0x%04x, chip_rev = 0x%02x) " | |
1092 | "attached to SPI bus_num %d, chip_select %d. " | |
1093 | "spi->max_speed_hz=%d\n", | |
1094 | card->card_id, card->card_rev, | |
1095 | spi->master->bus_num, spi->chip_select, | |
1096 | spi->max_speed_hz); | |
1097 | err = if_spi_prog_helper_firmware(card); | |
1098 | if (err) | |
4d1d4985 | 1099 | goto free_card; |
d2b21f19 CM |
1100 | err = if_spi_prog_main_firmware(card); |
1101 | if (err) | |
4d1d4985 | 1102 | goto free_card; |
d2b21f19 CM |
1103 | lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n"); |
1104 | } | |
1105 | ||
1106 | err = spu_set_interrupt_mode(card, 0, 1); | |
1107 | if (err) | |
4d1d4985 | 1108 | goto free_card; |
d2b21f19 CM |
1109 | |
1110 | /* Register our card with libertas. | |
1111 | * This will call alloc_etherdev */ | |
1112 | priv = lbs_add_card(card, &spi->dev); | |
1113 | if (!priv) { | |
1114 | err = -ENOMEM; | |
4d1d4985 | 1115 | goto free_card; |
d2b21f19 CM |
1116 | } |
1117 | card->priv = priv; | |
1118 | priv->card = card; | |
1119 | priv->hw_host_to_card = if_spi_host_to_card; | |
1120 | priv->fw_ready = 1; | |
d2b21f19 CM |
1121 | |
1122 | /* Initialize interrupt handling stuff. */ | |
1123 | card->run_thread = 1; | |
1124 | card->spi_thread = kthread_run(lbs_spi_thread, card, "lbs_spi_thread"); | |
1125 | if (IS_ERR(card->spi_thread)) { | |
1126 | card->run_thread = 0; | |
1127 | err = PTR_ERR(card->spi_thread); | |
1128 | lbs_pr_err("error creating SPI thread: err=%d\n", err); | |
1129 | goto remove_card; | |
1130 | } | |
b26ed97c AN |
1131 | if (sched_setscheduler(card->spi_thread, SCHED_FIFO, ¶m)) |
1132 | lbs_pr_err("Error setting scheduler, using default.\n"); | |
1133 | ||
d2b21f19 CM |
1134 | err = request_irq(spi->irq, if_spi_host_interrupt, |
1135 | IRQF_TRIGGER_FALLING, "libertas_spi", card); | |
1136 | if (err) { | |
1137 | lbs_pr_err("can't get host irq line-- request_irq failed\n"); | |
1138 | goto terminate_thread; | |
1139 | } | |
1140 | ||
1141 | /* Start the card. | |
1142 | * This will call register_netdev, and we'll start | |
1143 | * getting interrupts... */ | |
1144 | err = lbs_start_card(priv); | |
1145 | if (err) | |
1146 | goto release_irq; | |
1147 | ||
1148 | lbs_deb_spi("Finished initializing WLAN module.\n"); | |
1149 | ||
1150 | /* successful exit */ | |
1151 | goto out; | |
1152 | ||
1153 | release_irq: | |
1154 | free_irq(spi->irq, card); | |
1155 | terminate_thread: | |
1156 | if_spi_terminate_spi_thread(card); | |
1157 | remove_card: | |
1158 | lbs_remove_card(priv); /* will call free_netdev */ | |
d2b21f19 CM |
1159 | free_card: |
1160 | free_if_spi_card(card); | |
1161 | out: | |
1162 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1163 | return err; | |
1164 | } | |
1165 | ||
1166 | static int __devexit libertas_spi_remove(struct spi_device *spi) | |
1167 | { | |
1168 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1169 | struct lbs_private *priv = card->priv; | |
1170 | ||
1171 | lbs_deb_spi("libertas_spi_remove\n"); | |
1172 | lbs_deb_enter(LBS_DEB_SPI); | |
d2b21f19 CM |
1173 | |
1174 | lbs_stop_card(priv); | |
efcfd1f2 AY |
1175 | lbs_remove_card(priv); /* will call free_netdev */ |
1176 | ||
1177 | priv->surpriseremoved = 1; | |
d2b21f19 CM |
1178 | free_irq(spi->irq, card); |
1179 | if_spi_terminate_spi_thread(card); | |
0c2bec96 MR |
1180 | if (card->pdata->teardown) |
1181 | card->pdata->teardown(spi); | |
d2b21f19 CM |
1182 | free_if_spi_card(card); |
1183 | lbs_deb_leave(LBS_DEB_SPI); | |
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static struct spi_driver libertas_spi_driver = { | |
1188 | .probe = if_spi_probe, | |
1189 | .remove = __devexit_p(libertas_spi_remove), | |
1190 | .driver = { | |
1191 | .name = "libertas_spi", | |
1192 | .bus = &spi_bus_type, | |
1193 | .owner = THIS_MODULE, | |
1194 | }, | |
1195 | }; | |
1196 | ||
1197 | /* | |
1198 | * Module functions | |
1199 | */ | |
1200 | ||
1201 | static int __init if_spi_init_module(void) | |
1202 | { | |
1203 | int ret = 0; | |
1204 | lbs_deb_enter(LBS_DEB_SPI); | |
1205 | printk(KERN_INFO "libertas_spi: Libertas SPI driver\n"); | |
1206 | ret = spi_register_driver(&libertas_spi_driver); | |
1207 | lbs_deb_leave(LBS_DEB_SPI); | |
1208 | return ret; | |
1209 | } | |
1210 | ||
1211 | static void __exit if_spi_exit_module(void) | |
1212 | { | |
1213 | lbs_deb_enter(LBS_DEB_SPI); | |
1214 | spi_unregister_driver(&libertas_spi_driver); | |
1215 | lbs_deb_leave(LBS_DEB_SPI); | |
1216 | } | |
1217 | ||
1218 | module_init(if_spi_init_module); | |
1219 | module_exit(if_spi_exit_module); | |
1220 | ||
1221 | MODULE_DESCRIPTION("Libertas SPI WLAN Driver"); | |
1222 | MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, " | |
1223 | "Colin McCabe <colin@cozybit.com>"); | |
1224 | MODULE_LICENSE("GPL"); | |
e0626e38 | 1225 | MODULE_ALIAS("spi:libertas_spi"); |