Commit | Line | Data |
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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 | 22 | #include <linux/jiffies.h> |
d2b21f19 CM |
23 | #include <linux/list.h> |
24 | #include <linux/netdevice.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
d2b21f19 CM |
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 | ||
16f775be VK |
35 | struct if_spi_packet { |
36 | struct list_head list; | |
37 | u16 blen; | |
38 | u8 buffer[0] __attribute__((aligned(4))); | |
39 | }; | |
40 | ||
d2b21f19 CM |
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 | |
d2b21f19 CM |
46 | /* The card ID and card revision, as reported by the hardware. */ |
47 | u16 card_id; | |
48 | u8 card_rev; | |
49 | ||
d2b21f19 CM |
50 | /* The last time that we initiated an SPU operation */ |
51 | unsigned long prev_xfer_time; | |
52 | ||
53 | int use_dummy_writes; | |
54 | unsigned long spu_port_delay; | |
55 | unsigned long spu_reg_delay; | |
56 | ||
57 | /* Handles all SPI communication (except for FW load) */ | |
16f775be VK |
58 | struct workqueue_struct *workqueue; |
59 | struct work_struct packet_work; | |
d2b21f19 CM |
60 | |
61 | u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE]; | |
16f775be VK |
62 | |
63 | /* A buffer of incoming packets from libertas core. | |
64 | * Since we can't sleep in hw_host_to_card, we have to buffer | |
65 | * them. */ | |
66 | struct list_head cmd_packet_list; | |
67 | struct list_head data_packet_list; | |
68 | ||
69 | /* Protects cmd_packet_list and data_packet_list */ | |
70 | spinlock_t buffer_lock; | |
d2b21f19 CM |
71 | }; |
72 | ||
73 | static void free_if_spi_card(struct if_spi_card *card) | |
74 | { | |
16f775be VK |
75 | struct list_head *cursor, *next; |
76 | struct if_spi_packet *packet; | |
77 | ||
78 | list_for_each_safe(cursor, next, &card->cmd_packet_list) { | |
79 | packet = container_of(cursor, struct if_spi_packet, list); | |
80 | list_del(&packet->list); | |
81 | kfree(packet); | |
82 | } | |
83 | list_for_each_safe(cursor, next, &card->data_packet_list) { | |
84 | packet = container_of(cursor, struct if_spi_packet, list); | |
85 | list_del(&packet->list); | |
86 | kfree(packet); | |
87 | } | |
d2b21f19 CM |
88 | spi_set_drvdata(card->spi, NULL); |
89 | kfree(card); | |
90 | } | |
91 | ||
915a824e DW |
92 | #define MODEL_8385 0x04 |
93 | #define MODEL_8686 0x0b | |
94 | #define MODEL_8688 0x10 | |
95 | ||
96 | static const struct lbs_fw_table fw_table[] = { | |
97 | { MODEL_8385, "libertas/gspi8385_helper.bin", "libertas/gspi8385.bin" }, | |
98 | { MODEL_8385, "libertas/gspi8385_hlp.bin", "libertas/gspi8385.bin" }, | |
99 | { MODEL_8686, "libertas/gspi8686_v9_helper.bin", "libertas/gspi8686_v9.bin" }, | |
100 | { MODEL_8686, "libertas/gspi8686_hlp.bin", "libertas/gspi8686.bin" }, | |
101 | { MODEL_8688, "libertas/gspi8688_helper.bin", "libertas/gspi8688.bin" }, | |
102 | { 0, NULL, NULL } | |
d2b21f19 | 103 | }; |
915a824e DW |
104 | MODULE_FIRMWARE("libertas/gspi8385_helper.bin"); |
105 | MODULE_FIRMWARE("libertas/gspi8385_hlp.bin"); | |
106 | MODULE_FIRMWARE("libertas/gspi8385.bin"); | |
107 | MODULE_FIRMWARE("libertas/gspi8686_v9_helper.bin"); | |
108 | MODULE_FIRMWARE("libertas/gspi8686_v9.bin"); | |
109 | MODULE_FIRMWARE("libertas/gspi8686_hlp.bin"); | |
110 | MODULE_FIRMWARE("libertas/gspi8686.bin"); | |
111 | MODULE_FIRMWARE("libertas/gspi8688_helper.bin"); | |
112 | MODULE_FIRMWARE("libertas/gspi8688.bin"); | |
113 | ||
d2b21f19 CM |
114 | |
115 | /* | |
116 | * SPI Interface Unit Routines | |
117 | * | |
118 | * The SPU sits between the host and the WLAN module. | |
119 | * All communication with the firmware is through SPU transactions. | |
120 | * | |
121 | * First we have to put a SPU register name on the bus. Then we can | |
122 | * either read from or write to that register. | |
123 | * | |
d2b21f19 CM |
124 | */ |
125 | ||
126 | static void spu_transaction_init(struct if_spi_card *card) | |
127 | { | |
128 | if (!time_after(jiffies, card->prev_xfer_time + 1)) { | |
129 | /* Unfortunately, the SPU requires a delay between successive | |
130 | * transactions. If our last transaction was more than a jiffy | |
131 | * ago, we have obviously already delayed enough. | |
132 | * If not, we have to busy-wait to be on the safe side. */ | |
133 | ndelay(400); | |
134 | } | |
d2b21f19 CM |
135 | } |
136 | ||
137 | static void spu_transaction_finish(struct if_spi_card *card) | |
138 | { | |
d2b21f19 CM |
139 | card->prev_xfer_time = jiffies; |
140 | } | |
141 | ||
142 | /* Write out a byte buffer to an SPI register, | |
143 | * using a series of 16-bit transfers. */ | |
144 | static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) | |
145 | { | |
146 | int err = 0; | |
d18ba452 | 147 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK); |
4d1d4985 SAS |
148 | struct spi_message m; |
149 | struct spi_transfer reg_trans; | |
150 | struct spi_transfer data_trans; | |
151 | ||
152 | spi_message_init(&m); | |
153 | memset(®_trans, 0, sizeof(reg_trans)); | |
154 | memset(&data_trans, 0, sizeof(data_trans)); | |
d2b21f19 CM |
155 | |
156 | /* You must give an even number of bytes to the SPU, even if it | |
157 | * doesn't care about the last one. */ | |
158 | BUG_ON(len & 0x1); | |
159 | ||
160 | spu_transaction_init(card); | |
161 | ||
162 | /* write SPU register index */ | |
4d1d4985 SAS |
163 | reg_trans.tx_buf = ®_out; |
164 | reg_trans.len = sizeof(reg_out); | |
d2b21f19 | 165 | |
4d1d4985 SAS |
166 | data_trans.tx_buf = buf; |
167 | data_trans.len = len; | |
d2b21f19 | 168 | |
4d1d4985 SAS |
169 | spi_message_add_tail(®_trans, &m); |
170 | spi_message_add_tail(&data_trans, &m); | |
171 | ||
172 | err = spi_sync(card->spi, &m); | |
d2b21f19 CM |
173 | spu_transaction_finish(card); |
174 | return err; | |
175 | } | |
176 | ||
177 | static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val) | |
178 | { | |
d18ba452 | 179 | __le16 buff; |
d2b21f19 | 180 | |
f488b72d SAS |
181 | buff = cpu_to_le16(val); |
182 | return spu_write(card, reg, (u8 *)&buff, sizeof(u16)); | |
d2b21f19 CM |
183 | } |
184 | ||
185 | static inline int spu_reg_is_port_reg(u16 reg) | |
186 | { | |
187 | switch (reg) { | |
188 | case IF_SPI_IO_RDWRPORT_REG: | |
189 | case IF_SPI_CMD_RDWRPORT_REG: | |
190 | case IF_SPI_DATA_RDWRPORT_REG: | |
191 | return 1; | |
192 | default: | |
193 | return 0; | |
194 | } | |
195 | } | |
196 | ||
197 | static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len) | |
198 | { | |
4d1d4985 | 199 | unsigned int delay; |
d2b21f19 | 200 | int err = 0; |
d18ba452 | 201 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK); |
4d1d4985 SAS |
202 | struct spi_message m; |
203 | struct spi_transfer reg_trans; | |
204 | struct spi_transfer dummy_trans; | |
205 | struct spi_transfer data_trans; | |
d2b21f19 CM |
206 | |
207 | /* You must take an even number of bytes from the SPU, even if you | |
208 | * don't care about the last one. */ | |
209 | BUG_ON(len & 0x1); | |
210 | ||
211 | spu_transaction_init(card); | |
212 | ||
4d1d4985 SAS |
213 | spi_message_init(&m); |
214 | memset(®_trans, 0, sizeof(reg_trans)); | |
215 | memset(&dummy_trans, 0, sizeof(dummy_trans)); | |
216 | memset(&data_trans, 0, sizeof(data_trans)); | |
217 | ||
d2b21f19 | 218 | /* write SPU register index */ |
4d1d4985 SAS |
219 | reg_trans.tx_buf = ®_out; |
220 | reg_trans.len = sizeof(reg_out); | |
221 | spi_message_add_tail(®_trans, &m); | |
d2b21f19 CM |
222 | |
223 | delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay : | |
224 | card->spu_reg_delay; | |
225 | if (card->use_dummy_writes) { | |
226 | /* Clock in dummy cycles while the SPU fills the FIFO */ | |
4d1d4985 SAS |
227 | dummy_trans.len = delay / 8; |
228 | spi_message_add_tail(&dummy_trans, &m); | |
d2b21f19 CM |
229 | } else { |
230 | /* Busy-wait while the SPU fills the FIFO */ | |
4d1d4985 SAS |
231 | reg_trans.delay_usecs = |
232 | DIV_ROUND_UP((100 + (delay * 10)), 1000); | |
d2b21f19 CM |
233 | } |
234 | ||
235 | /* read in data */ | |
4d1d4985 SAS |
236 | data_trans.rx_buf = buf; |
237 | data_trans.len = len; | |
238 | spi_message_add_tail(&data_trans, &m); | |
d2b21f19 | 239 | |
4d1d4985 | 240 | err = spi_sync(card->spi, &m); |
d2b21f19 CM |
241 | spu_transaction_finish(card); |
242 | return err; | |
243 | } | |
244 | ||
245 | /* Read 16 bits from an SPI register */ | |
246 | static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val) | |
247 | { | |
d18ba452 | 248 | __le16 buf; |
f488b72d SAS |
249 | int ret; |
250 | ||
251 | ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
252 | if (ret == 0) | |
253 | *val = le16_to_cpup(&buf); | |
254 | return ret; | |
d2b21f19 CM |
255 | } |
256 | ||
257 | /* Read 32 bits from an SPI register. | |
258 | * The low 16 bits are read first. */ | |
259 | static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val) | |
260 | { | |
d18ba452 | 261 | __le32 buf; |
d2b21f19 | 262 | int err; |
f488b72d SAS |
263 | |
264 | err = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
d2b21f19 | 265 | if (!err) |
f488b72d | 266 | *val = le32_to_cpup(&buf); |
d2b21f19 CM |
267 | return err; |
268 | } | |
269 | ||
270 | /* Keep reading 16 bits from an SPI register until you get the correct result. | |
271 | * | |
272 | * If mask = 0, the correct result is any non-zero number. | |
273 | * If mask != 0, the correct result is any number where | |
274 | * number & target_mask == target | |
275 | * | |
276 | * Returns -ETIMEDOUT if a second passes without the correct result. */ | |
277 | static int spu_wait_for_u16(struct if_spi_card *card, u16 reg, | |
278 | u16 target_mask, u16 target) | |
279 | { | |
280 | int err; | |
281 | unsigned long timeout = jiffies + 5*HZ; | |
282 | while (1) { | |
283 | u16 val; | |
284 | err = spu_read_u16(card, reg, &val); | |
285 | if (err) | |
286 | return err; | |
287 | if (target_mask) { | |
288 | if ((val & target_mask) == target) | |
289 | return 0; | |
290 | } else { | |
291 | if (val) | |
292 | return 0; | |
293 | } | |
294 | udelay(100); | |
295 | if (time_after(jiffies, timeout)) { | |
296 | lbs_pr_err("%s: timeout with val=%02x, " | |
297 | "target_mask=%02x, target=%02x\n", | |
298 | __func__, val, target_mask, target); | |
299 | return -ETIMEDOUT; | |
300 | } | |
301 | } | |
302 | } | |
303 | ||
304 | /* Read 16 bits from an SPI register until you receive a specific value. | |
305 | * Returns -ETIMEDOUT if a 4 tries pass without success. */ | |
306 | static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target) | |
307 | { | |
308 | int err, try; | |
309 | for (try = 0; try < 4; ++try) { | |
310 | u32 val = 0; | |
311 | err = spu_read_u32(card, reg, &val); | |
312 | if (err) | |
313 | return err; | |
314 | if (val == target) | |
315 | return 0; | |
316 | mdelay(100); | |
317 | } | |
318 | return -ETIMEDOUT; | |
319 | } | |
320 | ||
321 | static int spu_set_interrupt_mode(struct if_spi_card *card, | |
322 | int suppress_host_int, | |
323 | int auto_int) | |
324 | { | |
325 | int err = 0; | |
326 | ||
327 | /* We can suppress a host interrupt by clearing the appropriate | |
328 | * bit in the "host interrupt status mask" register */ | |
329 | if (suppress_host_int) { | |
330 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
331 | if (err) | |
332 | return err; | |
333 | } else { | |
334 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, | |
335 | IF_SPI_HISM_TX_DOWNLOAD_RDY | | |
336 | IF_SPI_HISM_RX_UPLOAD_RDY | | |
337 | IF_SPI_HISM_CMD_DOWNLOAD_RDY | | |
338 | IF_SPI_HISM_CARDEVENT | | |
339 | IF_SPI_HISM_CMD_UPLOAD_RDY); | |
340 | if (err) | |
341 | return err; | |
342 | } | |
343 | ||
344 | /* If auto-interrupts are on, the completion of certain transactions | |
345 | * will trigger an interrupt automatically. If auto-interrupts | |
346 | * are off, we need to set the "Card Interrupt Cause" register to | |
347 | * trigger a card interrupt. */ | |
348 | if (auto_int) { | |
349 | err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG, | |
350 | IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO | | |
351 | IF_SPI_HICT_RX_UPLOAD_OVER_AUTO | | |
352 | IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO | | |
353 | IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO); | |
354 | if (err) | |
355 | return err; | |
356 | } else { | |
357 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
358 | if (err) | |
359 | return err; | |
360 | } | |
361 | return err; | |
362 | } | |
363 | ||
364 | static int spu_get_chip_revision(struct if_spi_card *card, | |
365 | u16 *card_id, u8 *card_rev) | |
366 | { | |
367 | int err = 0; | |
368 | u32 dev_ctrl; | |
369 | err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl); | |
370 | if (err) | |
371 | return err; | |
372 | *card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl); | |
373 | *card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl); | |
374 | return err; | |
375 | } | |
376 | ||
377 | static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) | |
378 | { | |
379 | int err = 0; | |
380 | u16 rval; | |
381 | /* set bus mode */ | |
382 | err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode); | |
383 | if (err) | |
384 | return err; | |
385 | /* Check that we were able to read back what we just wrote. */ | |
386 | err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); | |
387 | if (err) | |
388 | return err; | |
88d89526 | 389 | if ((rval & 0xF) != mode) { |
d2b21f19 CM |
390 | lbs_pr_err("Can't read bus mode register.\n"); |
391 | return -EIO; | |
392 | } | |
393 | return 0; | |
394 | } | |
395 | ||
396 | static int spu_init(struct if_spi_card *card, int use_dummy_writes) | |
397 | { | |
398 | int err = 0; | |
399 | u32 delay; | |
400 | ||
401 | /* We have to start up in timed delay mode so that we can safely | |
402 | * read the Delay Read Register. */ | |
403 | card->use_dummy_writes = 0; | |
404 | err = spu_set_bus_mode(card, | |
405 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
406 | IF_SPI_BUS_MODE_DELAY_METHOD_TIMED | | |
407 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
408 | if (err) | |
409 | return err; | |
410 | card->spu_port_delay = 1000; | |
411 | card->spu_reg_delay = 1000; | |
412 | err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay); | |
413 | if (err) | |
414 | return err; | |
415 | card->spu_port_delay = delay & 0x0000ffff; | |
416 | card->spu_reg_delay = (delay & 0xffff0000) >> 16; | |
417 | ||
418 | /* If dummy clock delay mode has been requested, switch to it now */ | |
419 | if (use_dummy_writes) { | |
420 | card->use_dummy_writes = 1; | |
421 | err = spu_set_bus_mode(card, | |
422 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
423 | IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK | | |
424 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
425 | if (err) | |
426 | return err; | |
427 | } | |
428 | ||
429 | lbs_deb_spi("Initialized SPU unit. " | |
430 | "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n", | |
431 | card->spu_port_delay, card->spu_reg_delay); | |
432 | return err; | |
433 | } | |
434 | ||
435 | /* | |
436 | * Firmware Loading | |
437 | */ | |
438 | ||
915a824e DW |
439 | static int if_spi_prog_helper_firmware(struct if_spi_card *card, |
440 | const struct firmware *firmware) | |
d2b21f19 CM |
441 | { |
442 | int err = 0; | |
d2b21f19 CM |
443 | int bytes_remaining; |
444 | const u8 *fw; | |
445 | u8 temp[HELPER_FW_LOAD_CHUNK_SZ]; | |
d2b21f19 CM |
446 | |
447 | lbs_deb_enter(LBS_DEB_SPI); | |
448 | ||
449 | err = spu_set_interrupt_mode(card, 1, 0); | |
450 | if (err) | |
451 | goto out; | |
915a824e | 452 | |
d2b21f19 CM |
453 | bytes_remaining = firmware->size; |
454 | fw = firmware->data; | |
455 | ||
456 | /* Load helper firmware image */ | |
457 | while (bytes_remaining > 0) { | |
458 | /* Scratch pad 1 should contain the number of bytes we | |
459 | * want to download to the firmware */ | |
460 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, | |
461 | HELPER_FW_LOAD_CHUNK_SZ); | |
462 | if (err) | |
915a824e | 463 | goto out; |
d2b21f19 CM |
464 | |
465 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
466 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
467 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
468 | if (err) | |
915a824e | 469 | goto out; |
d2b21f19 CM |
470 | |
471 | /* Feed the data into the command read/write port reg | |
472 | * in chunks of 64 bytes */ | |
473 | memset(temp, 0, sizeof(temp)); | |
474 | memcpy(temp, fw, | |
475 | min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ)); | |
476 | mdelay(10); | |
477 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
478 | temp, HELPER_FW_LOAD_CHUNK_SZ); | |
479 | if (err) | |
915a824e | 480 | goto out; |
d2b21f19 CM |
481 | |
482 | /* Interrupt the boot code */ | |
483 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
484 | if (err) | |
915a824e | 485 | goto out; |
d2b21f19 CM |
486 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, |
487 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
488 | if (err) | |
915a824e | 489 | goto out; |
d2b21f19 CM |
490 | bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ; |
491 | fw += HELPER_FW_LOAD_CHUNK_SZ; | |
492 | } | |
493 | ||
494 | /* Once the helper / single stage firmware download is complete, | |
495 | * write 0 to scratch pad 1 and interrupt the | |
496 | * bootloader. This completes the helper download. */ | |
497 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK); | |
498 | if (err) | |
915a824e | 499 | goto out; |
d2b21f19 CM |
500 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); |
501 | if (err) | |
915a824e | 502 | goto out; |
d2b21f19 CM |
503 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, |
504 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
915a824e | 505 | goto out; |
d2b21f19 CM |
506 | |
507 | lbs_deb_spi("waiting for helper to boot...\n"); | |
508 | ||
d2b21f19 CM |
509 | out: |
510 | if (err) | |
511 | lbs_pr_err("failed to load helper firmware (err=%d)\n", err); | |
512 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
513 | return err; | |
514 | } | |
515 | ||
516 | /* Returns the length of the next packet the firmware expects us to send | |
517 | * Sets crc_err if the previous transfer had a CRC error. */ | |
518 | static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card, | |
519 | int *crc_err) | |
520 | { | |
521 | u16 len; | |
522 | int err = 0; | |
523 | ||
524 | /* wait until the host interrupt status register indicates | |
525 | * that we are ready to download */ | |
526 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
527 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
528 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
529 | if (err) { | |
530 | lbs_pr_err("timed out waiting for host_int_status\n"); | |
531 | return err; | |
532 | } | |
533 | ||
534 | /* Ask the device how many bytes of firmware it wants. */ | |
535 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
536 | if (err) | |
537 | return err; | |
538 | ||
539 | if (len > IF_SPI_CMD_BUF_SIZE) { | |
540 | lbs_pr_err("firmware load device requested a larger " | |
541 | "tranfer than we are prepared to " | |
542 | "handle. (len = %d)\n", len); | |
543 | return -EIO; | |
544 | } | |
545 | if (len & 0x1) { | |
546 | lbs_deb_spi("%s: crc error\n", __func__); | |
547 | len &= ~0x1; | |
548 | *crc_err = 1; | |
549 | } else | |
550 | *crc_err = 0; | |
551 | ||
552 | return len; | |
553 | } | |
554 | ||
915a824e DW |
555 | static int if_spi_prog_main_firmware(struct if_spi_card *card, |
556 | const struct firmware *firmware) | |
d2b21f19 CM |
557 | { |
558 | int len, prev_len; | |
559 | int bytes, crc_err = 0, err = 0; | |
d2b21f19 | 560 | const u8 *fw; |
d2b21f19 CM |
561 | u16 num_crc_errs; |
562 | ||
563 | lbs_deb_enter(LBS_DEB_SPI); | |
564 | ||
565 | err = spu_set_interrupt_mode(card, 1, 0); | |
566 | if (err) | |
567 | goto out; | |
568 | ||
d2b21f19 CM |
569 | err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0); |
570 | if (err) { | |
571 | lbs_pr_err("%s: timed out waiting for initial " | |
572 | "scratch reg = 0\n", __func__); | |
915a824e | 573 | goto out; |
d2b21f19 CM |
574 | } |
575 | ||
576 | num_crc_errs = 0; | |
577 | prev_len = 0; | |
578 | bytes = firmware->size; | |
579 | fw = firmware->data; | |
580 | while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) { | |
581 | if (len < 0) { | |
582 | err = len; | |
915a824e | 583 | goto out; |
d2b21f19 CM |
584 | } |
585 | if (bytes < 0) { | |
586 | /* If there are no more bytes left, we would normally | |
587 | * expect to have terminated with len = 0 */ | |
588 | lbs_pr_err("Firmware load wants more bytes " | |
589 | "than we have to offer.\n"); | |
590 | break; | |
591 | } | |
592 | if (crc_err) { | |
593 | /* Previous transfer failed. */ | |
594 | if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) { | |
595 | lbs_pr_err("Too many CRC errors encountered " | |
596 | "in firmware load.\n"); | |
597 | err = -EIO; | |
915a824e | 598 | goto out; |
d2b21f19 CM |
599 | } |
600 | } else { | |
601 | /* Previous transfer succeeded. Advance counters. */ | |
602 | bytes -= prev_len; | |
603 | fw += prev_len; | |
604 | } | |
605 | if (bytes < len) { | |
606 | memset(card->cmd_buffer, 0, len); | |
607 | memcpy(card->cmd_buffer, fw, bytes); | |
608 | } else | |
609 | memcpy(card->cmd_buffer, fw, len); | |
610 | ||
611 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
612 | if (err) | |
915a824e | 613 | goto out; |
d2b21f19 CM |
614 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, |
615 | card->cmd_buffer, len); | |
616 | if (err) | |
915a824e | 617 | goto out; |
d2b21f19 CM |
618 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG , |
619 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
620 | if (err) | |
915a824e | 621 | goto out; |
d2b21f19 CM |
622 | prev_len = len; |
623 | } | |
624 | if (bytes > prev_len) { | |
625 | lbs_pr_err("firmware load wants fewer bytes than " | |
626 | "we have to offer.\n"); | |
627 | } | |
628 | ||
629 | /* Confirm firmware download */ | |
630 | err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG, | |
631 | SUCCESSFUL_FW_DOWNLOAD_MAGIC); | |
632 | if (err) { | |
633 | lbs_pr_err("failed to confirm the firmware download\n"); | |
915a824e | 634 | goto out; |
d2b21f19 CM |
635 | } |
636 | ||
d2b21f19 CM |
637 | out: |
638 | if (err) | |
639 | lbs_pr_err("failed to load firmware (err=%d)\n", err); | |
640 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); | |
641 | return err; | |
642 | } | |
643 | ||
644 | /* | |
645 | * SPI Transfer Thread | |
646 | * | |
16f775be | 647 | * The SPI worker handles all SPI transfers, so there is no need for a lock. |
d2b21f19 CM |
648 | */ |
649 | ||
650 | /* Move a command from the card to the host */ | |
651 | static int if_spi_c2h_cmd(struct if_spi_card *card) | |
652 | { | |
653 | struct lbs_private *priv = card->priv; | |
654 | unsigned long flags; | |
655 | int err = 0; | |
656 | u16 len; | |
657 | u8 i; | |
658 | ||
659 | /* We need a buffer big enough to handle whatever people send to | |
660 | * hw_host_to_card */ | |
661 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE); | |
662 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE); | |
663 | ||
664 | /* It's just annoying if the buffer size isn't a multiple of 4, because | |
665 | * then we might have len < IF_SPI_CMD_BUF_SIZE but | |
666 | * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE */ | |
667 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0); | |
668 | ||
669 | lbs_deb_enter(LBS_DEB_SPI); | |
670 | ||
671 | /* How many bytes are there to read? */ | |
672 | err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len); | |
673 | if (err) | |
674 | goto out; | |
675 | if (!len) { | |
676 | lbs_pr_err("%s: error: card has no data for host\n", | |
677 | __func__); | |
678 | err = -EINVAL; | |
679 | goto out; | |
680 | } else if (len > IF_SPI_CMD_BUF_SIZE) { | |
681 | lbs_pr_err("%s: error: response packet too large: " | |
682 | "%d bytes, but maximum is %d\n", | |
683 | __func__, len, IF_SPI_CMD_BUF_SIZE); | |
684 | err = -EINVAL; | |
685 | goto out; | |
686 | } | |
687 | ||
688 | /* Read the data from the WLAN module into our command buffer */ | |
689 | err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG, | |
690 | card->cmd_buffer, ALIGN(len, 4)); | |
691 | if (err) | |
692 | goto out; | |
693 | ||
694 | spin_lock_irqsave(&priv->driver_lock, flags); | |
695 | i = (priv->resp_idx == 0) ? 1 : 0; | |
696 | BUG_ON(priv->resp_len[i]); | |
697 | priv->resp_len[i] = len; | |
698 | memcpy(priv->resp_buf[i], card->cmd_buffer, len); | |
699 | lbs_notify_command_response(priv, i); | |
700 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
701 | ||
702 | out: | |
703 | if (err) | |
704 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
705 | lbs_deb_leave(LBS_DEB_SPI); | |
706 | return err; | |
707 | } | |
708 | ||
709 | /* Move data from the card to the host */ | |
710 | static int if_spi_c2h_data(struct if_spi_card *card) | |
711 | { | |
712 | struct sk_buff *skb; | |
713 | char *data; | |
714 | u16 len; | |
715 | int err = 0; | |
716 | ||
717 | lbs_deb_enter(LBS_DEB_SPI); | |
718 | ||
719 | /* How many bytes are there to read? */ | |
720 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
721 | if (err) | |
722 | goto out; | |
723 | if (!len) { | |
724 | lbs_pr_err("%s: error: card has no data for host\n", | |
725 | __func__); | |
726 | err = -EINVAL; | |
727 | goto out; | |
728 | } else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
729 | lbs_pr_err("%s: error: card has %d bytes of data, but " | |
efcfd1f2 | 730 | "our maximum skb size is %zu\n", |
d2b21f19 CM |
731 | __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); |
732 | err = -EINVAL; | |
733 | goto out; | |
734 | } | |
735 | ||
736 | /* TODO: should we allocate a smaller skb if we have less data? */ | |
737 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
738 | if (!skb) { | |
739 | err = -ENOBUFS; | |
740 | goto out; | |
741 | } | |
742 | skb_reserve(skb, IPFIELD_ALIGN_OFFSET); | |
743 | data = skb_put(skb, len); | |
744 | ||
745 | /* Read the data from the WLAN module into our skb... */ | |
746 | err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); | |
747 | if (err) | |
748 | goto free_skb; | |
749 | ||
750 | /* pass the SKB to libertas */ | |
751 | err = lbs_process_rxed_packet(card->priv, skb); | |
752 | if (err) | |
753 | goto free_skb; | |
754 | ||
755 | /* success */ | |
756 | goto out; | |
757 | ||
758 | free_skb: | |
759 | dev_kfree_skb(skb); | |
760 | out: | |
761 | if (err) | |
762 | lbs_pr_err("%s: err=%d\n", __func__, err); | |
763 | lbs_deb_leave(LBS_DEB_SPI); | |
764 | return err; | |
765 | } | |
766 | ||
16f775be VK |
767 | /* Move data or a command from the host to the card. */ |
768 | static void if_spi_h2c(struct if_spi_card *card, | |
769 | struct if_spi_packet *packet, int type) | |
770 | { | |
771 | int err = 0; | |
772 | u16 int_type, port_reg; | |
773 | ||
774 | switch (type) { | |
775 | case MVMS_DAT: | |
776 | int_type = IF_SPI_CIC_TX_DOWNLOAD_OVER; | |
777 | port_reg = IF_SPI_DATA_RDWRPORT_REG; | |
778 | break; | |
779 | case MVMS_CMD: | |
780 | int_type = IF_SPI_CIC_CMD_DOWNLOAD_OVER; | |
781 | port_reg = IF_SPI_CMD_RDWRPORT_REG; | |
782 | break; | |
783 | default: | |
784 | lbs_pr_err("can't transfer buffer of type %d\n", type); | |
785 | err = -EINVAL; | |
786 | goto out; | |
787 | } | |
788 | ||
789 | /* Write the data to the card */ | |
790 | err = spu_write(card, port_reg, packet->buffer, packet->blen); | |
791 | if (err) | |
792 | goto out; | |
793 | ||
794 | out: | |
795 | kfree(packet); | |
796 | ||
797 | if (err) | |
798 | lbs_pr_err("%s: error %d\n", __func__, err); | |
799 | } | |
800 | ||
d2b21f19 CM |
801 | /* Inform the host about a card event */ |
802 | static void if_spi_e2h(struct if_spi_card *card) | |
803 | { | |
804 | int err = 0; | |
d2b21f19 CM |
805 | u32 cause; |
806 | struct lbs_private *priv = card->priv; | |
807 | ||
808 | err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause); | |
809 | if (err) | |
810 | goto out; | |
811 | ||
ea2d0639 | 812 | /* re-enable the card event interrupt */ |
813 | spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
814 | ~IF_SPI_HICU_CARD_EVENT); | |
815 | ||
816 | /* generate a card interrupt */ | |
817 | spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT); | |
818 | ||
d2b21f19 | 819 | lbs_queue_event(priv, cause & 0xff); |
d2b21f19 CM |
820 | out: |
821 | if (err) | |
822 | lbs_pr_err("%s: error %d\n", __func__, err); | |
823 | } | |
824 | ||
16f775be | 825 | static void if_spi_host_to_card_worker(struct work_struct *work) |
d2b21f19 CM |
826 | { |
827 | int err; | |
16f775be | 828 | struct if_spi_card *card; |
d2b21f19 | 829 | u16 hiStatus; |
16f775be VK |
830 | unsigned long flags; |
831 | struct if_spi_packet *packet; | |
d2b21f19 | 832 | |
16f775be | 833 | card = container_of(work, struct if_spi_card, packet_work); |
d2b21f19 | 834 | |
16f775be VK |
835 | lbs_deb_enter(LBS_DEB_SPI); |
836 | ||
837 | /* Read the host interrupt status register to see what we | |
838 | * can do. */ | |
839 | err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
840 | &hiStatus); | |
841 | if (err) { | |
842 | lbs_pr_err("I/O error\n"); | |
843 | goto err; | |
844 | } | |
845 | ||
846 | if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) { | |
847 | err = if_spi_c2h_cmd(card); | |
848 | if (err) | |
d2b21f19 | 849 | goto err; |
16f775be VK |
850 | } |
851 | if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) { | |
852 | err = if_spi_c2h_data(card); | |
853 | if (err) | |
854 | goto err; | |
855 | } | |
d2b21f19 | 856 | |
16f775be VK |
857 | /* workaround: in PS mode, the card does not set the Command |
858 | * Download Ready bit, but it sets TX Download Ready. */ | |
859 | if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY || | |
860 | (card->priv->psstate != PS_STATE_FULL_POWER && | |
861 | (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) { | |
862 | /* This means two things. First of all, | |
863 | * if there was a previous command sent, the card has | |
864 | * successfully received it. | |
865 | * Secondly, it is now ready to download another | |
866 | * command. | |
867 | */ | |
868 | lbs_host_to_card_done(card->priv); | |
869 | ||
870 | /* Do we have any command packets from the host to | |
871 | * send? */ | |
872 | packet = NULL; | |
873 | spin_lock_irqsave(&card->buffer_lock, flags); | |
874 | if (!list_empty(&card->cmd_packet_list)) { | |
875 | packet = (struct if_spi_packet *)(card-> | |
876 | cmd_packet_list.next); | |
877 | list_del(&packet->list); | |
2674f82d | 878 | } |
16f775be | 879 | spin_unlock_irqrestore(&card->buffer_lock, flags); |
b3781c74 | 880 | |
16f775be VK |
881 | if (packet) |
882 | if_spi_h2c(card, packet, MVMS_CMD); | |
883 | } | |
884 | if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) { | |
885 | /* Do we have any data packets from the host to | |
886 | * send? */ | |
887 | packet = NULL; | |
888 | spin_lock_irqsave(&card->buffer_lock, flags); | |
889 | if (!list_empty(&card->data_packet_list)) { | |
890 | packet = (struct if_spi_packet *)(card-> | |
891 | data_packet_list.next); | |
892 | list_del(&packet->list); | |
d2b21f19 | 893 | } |
16f775be | 894 | spin_unlock_irqrestore(&card->buffer_lock, flags); |
d2b21f19 | 895 | |
16f775be VK |
896 | if (packet) |
897 | if_spi_h2c(card, packet, MVMS_DAT); | |
898 | } | |
899 | if (hiStatus & IF_SPI_HIST_CARD_EVENT) | |
900 | if_spi_e2h(card); | |
d2b21f19 CM |
901 | |
902 | err: | |
16f775be VK |
903 | if (err) |
904 | lbs_pr_err("%s: got error %d\n", __func__, err); | |
d2b21f19 | 905 | |
16f775be | 906 | lbs_deb_leave(LBS_DEB_SPI); |
d2b21f19 CM |
907 | } |
908 | ||
909 | /* | |
910 | * Host to Card | |
911 | * | |
912 | * Called from Libertas to transfer some data to the WLAN device | |
913 | * We can't sleep here. */ | |
914 | static int if_spi_host_to_card(struct lbs_private *priv, | |
915 | u8 type, u8 *buf, u16 nb) | |
916 | { | |
917 | int err = 0; | |
16f775be | 918 | unsigned long flags; |
d2b21f19 | 919 | struct if_spi_card *card = priv->card; |
16f775be VK |
920 | struct if_spi_packet *packet; |
921 | u16 blen; | |
d2b21f19 CM |
922 | |
923 | lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb); | |
924 | ||
16f775be VK |
925 | if (nb == 0) { |
926 | lbs_pr_err("%s: invalid size requested: %d\n", __func__, nb); | |
927 | err = -EINVAL; | |
928 | goto out; | |
929 | } | |
930 | blen = ALIGN(nb, 4); | |
931 | packet = kzalloc(sizeof(struct if_spi_packet) + blen, GFP_ATOMIC); | |
932 | if (!packet) { | |
933 | err = -ENOMEM; | |
934 | goto out; | |
935 | } | |
936 | packet->blen = blen; | |
937 | memcpy(packet->buffer, buf, nb); | |
938 | memset(packet->buffer + nb, 0, blen - nb); | |
d2b21f19 CM |
939 | |
940 | switch (type) { | |
941 | case MVMS_CMD: | |
16f775be VK |
942 | priv->dnld_sent = DNLD_CMD_SENT; |
943 | spin_lock_irqsave(&card->buffer_lock, flags); | |
944 | list_add_tail(&packet->list, &card->cmd_packet_list); | |
945 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
d2b21f19 CM |
946 | break; |
947 | case MVMS_DAT: | |
16f775be VK |
948 | priv->dnld_sent = DNLD_DATA_SENT; |
949 | spin_lock_irqsave(&card->buffer_lock, flags); | |
950 | list_add_tail(&packet->list, &card->data_packet_list); | |
951 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
d2b21f19 CM |
952 | break; |
953 | default: | |
954 | lbs_pr_err("can't transfer buffer of type %d", type); | |
955 | err = -EINVAL; | |
956 | break; | |
957 | } | |
958 | ||
16f775be VK |
959 | /* Queue spi xfer work */ |
960 | queue_work(card->workqueue, &card->packet_work); | |
961 | out: | |
d2b21f19 CM |
962 | lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err); |
963 | return err; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Host Interrupts | |
968 | * | |
969 | * Service incoming interrupts from the WLAN device. We can't sleep here, so | |
16f775be | 970 | * don't try to talk on the SPI bus, just queue the SPI xfer work. |
d2b21f19 CM |
971 | */ |
972 | static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id) | |
973 | { | |
974 | struct if_spi_card *card = dev_id; | |
975 | ||
16f775be VK |
976 | queue_work(card->workqueue, &card->packet_work); |
977 | ||
d2b21f19 CM |
978 | return IRQ_HANDLED; |
979 | } | |
980 | ||
981 | /* | |
982 | * SPI callbacks | |
983 | */ | |
984 | ||
16f775be | 985 | static int if_spi_init_card(struct if_spi_card *card) |
d2b21f19 | 986 | { |
16f775be VK |
987 | struct spi_device *spi = card->spi; |
988 | int err, i; | |
d2b21f19 | 989 | u32 scratch; |
915a824e DW |
990 | const struct firmware *helper = NULL; |
991 | const struct firmware *mainfw = NULL; | |
d2b21f19 CM |
992 | |
993 | lbs_deb_enter(LBS_DEB_SPI); | |
994 | ||
16f775be | 995 | err = spu_init(card, card->pdata->use_dummy_writes); |
d2b21f19 | 996 | if (err) |
16f775be | 997 | goto out; |
d2b21f19 CM |
998 | err = spu_get_chip_revision(card, &card->card_id, &card->card_rev); |
999 | if (err) | |
16f775be | 1000 | goto out; |
d2b21f19 | 1001 | |
d2b21f19 CM |
1002 | err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch); |
1003 | if (err) | |
16f775be | 1004 | goto out; |
d2b21f19 CM |
1005 | if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC) |
1006 | lbs_deb_spi("Firmware is already loaded for " | |
1007 | "Marvell WLAN 802.11 adapter\n"); | |
1008 | else { | |
915a824e DW |
1009 | /* Check if we support this card */ |
1010 | for (i = 0; i < ARRAY_SIZE(fw_table); i++) { | |
1011 | if (card->card_id == fw_table[i].model) | |
1012 | break; | |
1013 | } | |
1014 | if (i == ARRAY_SIZE(fw_table)) { | |
1015 | lbs_pr_err("Unsupported chip_id: 0x%02x\n", | |
1016 | card->card_id); | |
1017 | err = -ENODEV; | |
16f775be | 1018 | goto out; |
915a824e DW |
1019 | } |
1020 | ||
1021 | err = lbs_get_firmware(&card->spi->dev, NULL, NULL, | |
1022 | card->card_id, &fw_table[0], &helper, | |
1023 | &mainfw); | |
1024 | if (err) { | |
1025 | lbs_pr_err("failed to find firmware (%d)\n", err); | |
16f775be | 1026 | goto out; |
915a824e | 1027 | } |
d2b21f19 CM |
1028 | |
1029 | lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter " | |
1030 | "(chip_id = 0x%04x, chip_rev = 0x%02x) " | |
1031 | "attached to SPI bus_num %d, chip_select %d. " | |
1032 | "spi->max_speed_hz=%d\n", | |
1033 | card->card_id, card->card_rev, | |
1034 | spi->master->bus_num, spi->chip_select, | |
1035 | spi->max_speed_hz); | |
915a824e | 1036 | err = if_spi_prog_helper_firmware(card, helper); |
d2b21f19 | 1037 | if (err) |
16f775be | 1038 | goto out; |
915a824e | 1039 | err = if_spi_prog_main_firmware(card, mainfw); |
d2b21f19 | 1040 | if (err) |
16f775be | 1041 | goto out; |
d2b21f19 CM |
1042 | lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n"); |
1043 | } | |
1044 | ||
1045 | err = spu_set_interrupt_mode(card, 0, 1); | |
16f775be VK |
1046 | if (err) |
1047 | goto out; | |
1048 | ||
1049 | out: | |
1050 | if (helper) | |
1051 | release_firmware(helper); | |
1052 | if (mainfw) | |
1053 | release_firmware(mainfw); | |
1054 | ||
1055 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1056 | ||
1057 | return err; | |
1058 | } | |
1059 | ||
1060 | static int __devinit if_spi_probe(struct spi_device *spi) | |
1061 | { | |
1062 | struct if_spi_card *card; | |
1063 | struct lbs_private *priv = NULL; | |
1064 | struct libertas_spi_platform_data *pdata = spi->dev.platform_data; | |
1065 | int err = 0; | |
1066 | ||
1067 | lbs_deb_enter(LBS_DEB_SPI); | |
1068 | ||
1069 | if (!pdata) { | |
1070 | err = -EINVAL; | |
1071 | goto out; | |
1072 | } | |
1073 | ||
1074 | if (pdata->setup) { | |
1075 | err = pdata->setup(spi); | |
1076 | if (err) | |
1077 | goto out; | |
1078 | } | |
1079 | ||
1080 | /* Allocate card structure to represent this specific device */ | |
1081 | card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL); | |
1082 | if (!card) { | |
1083 | err = -ENOMEM; | |
1084 | goto teardown; | |
1085 | } | |
1086 | spi_set_drvdata(spi, card); | |
1087 | card->pdata = pdata; | |
1088 | card->spi = spi; | |
1089 | card->prev_xfer_time = jiffies; | |
1090 | ||
1091 | INIT_LIST_HEAD(&card->cmd_packet_list); | |
1092 | INIT_LIST_HEAD(&card->data_packet_list); | |
1093 | spin_lock_init(&card->buffer_lock); | |
1094 | ||
1095 | /* Initialize the SPI Interface Unit */ | |
1096 | ||
1097 | /* Firmware load */ | |
1098 | err = if_spi_init_card(card); | |
d2b21f19 | 1099 | if (err) |
4d1d4985 | 1100 | goto free_card; |
d2b21f19 CM |
1101 | |
1102 | /* Register our card with libertas. | |
1103 | * This will call alloc_etherdev */ | |
1104 | priv = lbs_add_card(card, &spi->dev); | |
1105 | if (!priv) { | |
1106 | err = -ENOMEM; | |
4d1d4985 | 1107 | goto free_card; |
d2b21f19 CM |
1108 | } |
1109 | card->priv = priv; | |
1110 | priv->card = card; | |
1111 | priv->hw_host_to_card = if_spi_host_to_card; | |
49125454 AK |
1112 | priv->enter_deep_sleep = NULL; |
1113 | priv->exit_deep_sleep = NULL; | |
1114 | priv->reset_deep_sleep_wakeup = NULL; | |
d2b21f19 | 1115 | priv->fw_ready = 1; |
d2b21f19 CM |
1116 | |
1117 | /* Initialize interrupt handling stuff. */ | |
16f775be VK |
1118 | card->workqueue = create_workqueue("libertas_spi"); |
1119 | INIT_WORK(&card->packet_work, if_spi_host_to_card_worker); | |
b26ed97c | 1120 | |
d2b21f19 CM |
1121 | err = request_irq(spi->irq, if_spi_host_interrupt, |
1122 | IRQF_TRIGGER_FALLING, "libertas_spi", card); | |
1123 | if (err) { | |
1124 | lbs_pr_err("can't get host irq line-- request_irq failed\n"); | |
16f775be | 1125 | goto terminate_workqueue; |
d2b21f19 CM |
1126 | } |
1127 | ||
1128 | /* Start the card. | |
1129 | * This will call register_netdev, and we'll start | |
1130 | * getting interrupts... */ | |
1131 | err = lbs_start_card(priv); | |
1132 | if (err) | |
1133 | goto release_irq; | |
1134 | ||
1135 | lbs_deb_spi("Finished initializing WLAN module.\n"); | |
1136 | ||
1137 | /* successful exit */ | |
1138 | goto out; | |
1139 | ||
1140 | release_irq: | |
1141 | free_irq(spi->irq, card); | |
16f775be VK |
1142 | terminate_workqueue: |
1143 | flush_workqueue(card->workqueue); | |
1144 | destroy_workqueue(card->workqueue); | |
d2b21f19 | 1145 | lbs_remove_card(priv); /* will call free_netdev */ |
d2b21f19 CM |
1146 | free_card: |
1147 | free_if_spi_card(card); | |
16f775be VK |
1148 | teardown: |
1149 | if (pdata->teardown) | |
1150 | pdata->teardown(spi); | |
d2b21f19 CM |
1151 | out: |
1152 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1153 | return err; | |
1154 | } | |
1155 | ||
1156 | static int __devexit libertas_spi_remove(struct spi_device *spi) | |
1157 | { | |
1158 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1159 | struct lbs_private *priv = card->priv; | |
1160 | ||
1161 | lbs_deb_spi("libertas_spi_remove\n"); | |
1162 | lbs_deb_enter(LBS_DEB_SPI); | |
d2b21f19 CM |
1163 | |
1164 | lbs_stop_card(priv); | |
efcfd1f2 AY |
1165 | lbs_remove_card(priv); /* will call free_netdev */ |
1166 | ||
d2b21f19 | 1167 | free_irq(spi->irq, card); |
16f775be VK |
1168 | flush_workqueue(card->workqueue); |
1169 | destroy_workqueue(card->workqueue); | |
0c2bec96 MR |
1170 | if (card->pdata->teardown) |
1171 | card->pdata->teardown(spi); | |
d2b21f19 CM |
1172 | free_if_spi_card(card); |
1173 | lbs_deb_leave(LBS_DEB_SPI); | |
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | static struct spi_driver libertas_spi_driver = { | |
1178 | .probe = if_spi_probe, | |
1179 | .remove = __devexit_p(libertas_spi_remove), | |
1180 | .driver = { | |
1181 | .name = "libertas_spi", | |
1182 | .bus = &spi_bus_type, | |
1183 | .owner = THIS_MODULE, | |
1184 | }, | |
1185 | }; | |
1186 | ||
1187 | /* | |
1188 | * Module functions | |
1189 | */ | |
1190 | ||
1191 | static int __init if_spi_init_module(void) | |
1192 | { | |
1193 | int ret = 0; | |
1194 | lbs_deb_enter(LBS_DEB_SPI); | |
1195 | printk(KERN_INFO "libertas_spi: Libertas SPI driver\n"); | |
1196 | ret = spi_register_driver(&libertas_spi_driver); | |
1197 | lbs_deb_leave(LBS_DEB_SPI); | |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | static void __exit if_spi_exit_module(void) | |
1202 | { | |
1203 | lbs_deb_enter(LBS_DEB_SPI); | |
1204 | spi_unregister_driver(&libertas_spi_driver); | |
1205 | lbs_deb_leave(LBS_DEB_SPI); | |
1206 | } | |
1207 | ||
1208 | module_init(if_spi_init_module); | |
1209 | module_exit(if_spi_exit_module); | |
1210 | ||
1211 | MODULE_DESCRIPTION("Libertas SPI WLAN Driver"); | |
1212 | MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, " | |
1213 | "Colin McCabe <colin@cozybit.com>"); | |
1214 | MODULE_LICENSE("GPL"); | |
e0626e38 | 1215 | MODULE_ALIAS("spi:libertas_spi"); |