]>
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 | ||
0e4e06ae JP |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
d2b21f19 CM |
22 | #include <linux/moduleparam.h> |
23 | #include <linux/firmware.h> | |
d2b21f19 | 24 | #include <linux/jiffies.h> |
d2b21f19 CM |
25 | #include <linux/list.h> |
26 | #include <linux/netdevice.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 | ||
16f775be VK |
37 | struct if_spi_packet { |
38 | struct list_head list; | |
39 | u16 blen; | |
40 | u8 buffer[0] __attribute__((aligned(4))); | |
41 | }; | |
42 | ||
d2b21f19 CM |
43 | struct if_spi_card { |
44 | struct spi_device *spi; | |
45 | struct lbs_private *priv; | |
0c2bec96 | 46 | struct libertas_spi_platform_data *pdata; |
d2b21f19 | 47 | |
d2b21f19 CM |
48 | /* The card ID and card revision, as reported by the hardware. */ |
49 | u16 card_id; | |
50 | u8 card_rev; | |
51 | ||
d2b21f19 CM |
52 | /* The last time that we initiated an SPU operation */ |
53 | unsigned long prev_xfer_time; | |
54 | ||
55 | int use_dummy_writes; | |
56 | unsigned long spu_port_delay; | |
57 | unsigned long spu_reg_delay; | |
58 | ||
59 | /* Handles all SPI communication (except for FW load) */ | |
16f775be VK |
60 | struct workqueue_struct *workqueue; |
61 | struct work_struct packet_work; | |
f39de992 | 62 | struct work_struct resume_work; |
d2b21f19 CM |
63 | |
64 | u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE]; | |
16f775be VK |
65 | |
66 | /* A buffer of incoming packets from libertas core. | |
67 | * Since we can't sleep in hw_host_to_card, we have to buffer | |
68 | * them. */ | |
69 | struct list_head cmd_packet_list; | |
70 | struct list_head data_packet_list; | |
71 | ||
72 | /* Protects cmd_packet_list and data_packet_list */ | |
73 | spinlock_t buffer_lock; | |
f39de992 VK |
74 | |
75 | /* True is card suspended */ | |
76 | u8 suspended; | |
d2b21f19 CM |
77 | }; |
78 | ||
79 | static void free_if_spi_card(struct if_spi_card *card) | |
80 | { | |
16f775be VK |
81 | struct list_head *cursor, *next; |
82 | struct if_spi_packet *packet; | |
83 | ||
84 | list_for_each_safe(cursor, next, &card->cmd_packet_list) { | |
85 | packet = container_of(cursor, struct if_spi_packet, list); | |
86 | list_del(&packet->list); | |
87 | kfree(packet); | |
88 | } | |
89 | list_for_each_safe(cursor, next, &card->data_packet_list) { | |
90 | packet = container_of(cursor, struct if_spi_packet, list); | |
91 | list_del(&packet->list); | |
92 | kfree(packet); | |
93 | } | |
d2b21f19 CM |
94 | spi_set_drvdata(card->spi, NULL); |
95 | kfree(card); | |
96 | } | |
97 | ||
915a824e DW |
98 | #define MODEL_8385 0x04 |
99 | #define MODEL_8686 0x0b | |
100 | #define MODEL_8688 0x10 | |
101 | ||
102 | static const struct lbs_fw_table fw_table[] = { | |
103 | { MODEL_8385, "libertas/gspi8385_helper.bin", "libertas/gspi8385.bin" }, | |
104 | { MODEL_8385, "libertas/gspi8385_hlp.bin", "libertas/gspi8385.bin" }, | |
105 | { MODEL_8686, "libertas/gspi8686_v9_helper.bin", "libertas/gspi8686_v9.bin" }, | |
106 | { MODEL_8686, "libertas/gspi8686_hlp.bin", "libertas/gspi8686.bin" }, | |
107 | { MODEL_8688, "libertas/gspi8688_helper.bin", "libertas/gspi8688.bin" }, | |
108 | { 0, NULL, NULL } | |
d2b21f19 | 109 | }; |
915a824e DW |
110 | MODULE_FIRMWARE("libertas/gspi8385_helper.bin"); |
111 | MODULE_FIRMWARE("libertas/gspi8385_hlp.bin"); | |
112 | MODULE_FIRMWARE("libertas/gspi8385.bin"); | |
113 | MODULE_FIRMWARE("libertas/gspi8686_v9_helper.bin"); | |
114 | MODULE_FIRMWARE("libertas/gspi8686_v9.bin"); | |
115 | MODULE_FIRMWARE("libertas/gspi8686_hlp.bin"); | |
116 | MODULE_FIRMWARE("libertas/gspi8686.bin"); | |
117 | MODULE_FIRMWARE("libertas/gspi8688_helper.bin"); | |
118 | MODULE_FIRMWARE("libertas/gspi8688.bin"); | |
119 | ||
d2b21f19 CM |
120 | |
121 | /* | |
122 | * SPI Interface Unit Routines | |
123 | * | |
124 | * The SPU sits between the host and the WLAN module. | |
125 | * All communication with the firmware is through SPU transactions. | |
126 | * | |
127 | * First we have to put a SPU register name on the bus. Then we can | |
128 | * either read from or write to that register. | |
129 | * | |
d2b21f19 CM |
130 | */ |
131 | ||
132 | static void spu_transaction_init(struct if_spi_card *card) | |
133 | { | |
134 | if (!time_after(jiffies, card->prev_xfer_time + 1)) { | |
135 | /* Unfortunately, the SPU requires a delay between successive | |
136 | * transactions. If our last transaction was more than a jiffy | |
137 | * ago, we have obviously already delayed enough. | |
138 | * If not, we have to busy-wait to be on the safe side. */ | |
139 | ndelay(400); | |
140 | } | |
d2b21f19 CM |
141 | } |
142 | ||
143 | static void spu_transaction_finish(struct if_spi_card *card) | |
144 | { | |
d2b21f19 CM |
145 | card->prev_xfer_time = jiffies; |
146 | } | |
147 | ||
8973a6e7 RD |
148 | /* |
149 | * Write out a byte buffer to an SPI register, | |
150 | * using a series of 16-bit transfers. | |
151 | */ | |
d2b21f19 CM |
152 | static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) |
153 | { | |
154 | int err = 0; | |
d18ba452 | 155 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK); |
4d1d4985 SAS |
156 | struct spi_message m; |
157 | struct spi_transfer reg_trans; | |
158 | struct spi_transfer data_trans; | |
159 | ||
160 | spi_message_init(&m); | |
161 | memset(®_trans, 0, sizeof(reg_trans)); | |
162 | memset(&data_trans, 0, sizeof(data_trans)); | |
d2b21f19 CM |
163 | |
164 | /* You must give an even number of bytes to the SPU, even if it | |
165 | * doesn't care about the last one. */ | |
166 | BUG_ON(len & 0x1); | |
167 | ||
168 | spu_transaction_init(card); | |
169 | ||
170 | /* write SPU register index */ | |
4d1d4985 SAS |
171 | reg_trans.tx_buf = ®_out; |
172 | reg_trans.len = sizeof(reg_out); | |
d2b21f19 | 173 | |
4d1d4985 SAS |
174 | data_trans.tx_buf = buf; |
175 | data_trans.len = len; | |
d2b21f19 | 176 | |
4d1d4985 SAS |
177 | spi_message_add_tail(®_trans, &m); |
178 | spi_message_add_tail(&data_trans, &m); | |
179 | ||
180 | err = spi_sync(card->spi, &m); | |
d2b21f19 CM |
181 | spu_transaction_finish(card); |
182 | return err; | |
183 | } | |
184 | ||
185 | static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val) | |
186 | { | |
d18ba452 | 187 | __le16 buff; |
d2b21f19 | 188 | |
f488b72d SAS |
189 | buff = cpu_to_le16(val); |
190 | return spu_write(card, reg, (u8 *)&buff, sizeof(u16)); | |
d2b21f19 CM |
191 | } |
192 | ||
193 | static inline int spu_reg_is_port_reg(u16 reg) | |
194 | { | |
195 | switch (reg) { | |
196 | case IF_SPI_IO_RDWRPORT_REG: | |
197 | case IF_SPI_CMD_RDWRPORT_REG: | |
198 | case IF_SPI_DATA_RDWRPORT_REG: | |
199 | return 1; | |
200 | default: | |
201 | return 0; | |
202 | } | |
203 | } | |
204 | ||
205 | static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len) | |
206 | { | |
4d1d4985 | 207 | unsigned int delay; |
d2b21f19 | 208 | int err = 0; |
d18ba452 | 209 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK); |
4d1d4985 SAS |
210 | struct spi_message m; |
211 | struct spi_transfer reg_trans; | |
212 | struct spi_transfer dummy_trans; | |
213 | struct spi_transfer data_trans; | |
d2b21f19 | 214 | |
8973a6e7 RD |
215 | /* |
216 | * You must take an even number of bytes from the SPU, even if you | |
217 | * don't care about the last one. | |
218 | */ | |
d2b21f19 CM |
219 | BUG_ON(len & 0x1); |
220 | ||
221 | spu_transaction_init(card); | |
222 | ||
4d1d4985 SAS |
223 | spi_message_init(&m); |
224 | memset(®_trans, 0, sizeof(reg_trans)); | |
225 | memset(&dummy_trans, 0, sizeof(dummy_trans)); | |
226 | memset(&data_trans, 0, sizeof(data_trans)); | |
227 | ||
d2b21f19 | 228 | /* write SPU register index */ |
4d1d4985 SAS |
229 | reg_trans.tx_buf = ®_out; |
230 | reg_trans.len = sizeof(reg_out); | |
231 | spi_message_add_tail(®_trans, &m); | |
d2b21f19 CM |
232 | |
233 | delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay : | |
234 | card->spu_reg_delay; | |
235 | if (card->use_dummy_writes) { | |
236 | /* Clock in dummy cycles while the SPU fills the FIFO */ | |
4d1d4985 SAS |
237 | dummy_trans.len = delay / 8; |
238 | spi_message_add_tail(&dummy_trans, &m); | |
d2b21f19 CM |
239 | } else { |
240 | /* Busy-wait while the SPU fills the FIFO */ | |
4d1d4985 SAS |
241 | reg_trans.delay_usecs = |
242 | DIV_ROUND_UP((100 + (delay * 10)), 1000); | |
d2b21f19 CM |
243 | } |
244 | ||
245 | /* read in data */ | |
4d1d4985 SAS |
246 | data_trans.rx_buf = buf; |
247 | data_trans.len = len; | |
248 | spi_message_add_tail(&data_trans, &m); | |
d2b21f19 | 249 | |
4d1d4985 | 250 | err = spi_sync(card->spi, &m); |
d2b21f19 CM |
251 | spu_transaction_finish(card); |
252 | return err; | |
253 | } | |
254 | ||
255 | /* Read 16 bits from an SPI register */ | |
256 | static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val) | |
257 | { | |
d18ba452 | 258 | __le16 buf; |
f488b72d SAS |
259 | int ret; |
260 | ||
261 | ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
262 | if (ret == 0) | |
263 | *val = le16_to_cpup(&buf); | |
264 | return ret; | |
d2b21f19 CM |
265 | } |
266 | ||
8973a6e7 RD |
267 | /* |
268 | * Read 32 bits from an SPI register. | |
269 | * The low 16 bits are read first. | |
270 | */ | |
d2b21f19 CM |
271 | static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val) |
272 | { | |
d18ba452 | 273 | __le32 buf; |
d2b21f19 | 274 | int err; |
f488b72d SAS |
275 | |
276 | err = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
d2b21f19 | 277 | if (!err) |
f488b72d | 278 | *val = le32_to_cpup(&buf); |
d2b21f19 CM |
279 | return err; |
280 | } | |
281 | ||
8973a6e7 RD |
282 | /* |
283 | * Keep reading 16 bits from an SPI register until you get the correct result. | |
d2b21f19 CM |
284 | * |
285 | * If mask = 0, the correct result is any non-zero number. | |
286 | * If mask != 0, the correct result is any number where | |
287 | * number & target_mask == target | |
288 | * | |
8973a6e7 RD |
289 | * Returns -ETIMEDOUT if a second passes without the correct result. |
290 | */ | |
d2b21f19 CM |
291 | static int spu_wait_for_u16(struct if_spi_card *card, u16 reg, |
292 | u16 target_mask, u16 target) | |
293 | { | |
294 | int err; | |
295 | unsigned long timeout = jiffies + 5*HZ; | |
296 | while (1) { | |
297 | u16 val; | |
298 | err = spu_read_u16(card, reg, &val); | |
299 | if (err) | |
300 | return err; | |
301 | if (target_mask) { | |
302 | if ((val & target_mask) == target) | |
303 | return 0; | |
304 | } else { | |
305 | if (val) | |
306 | return 0; | |
307 | } | |
308 | udelay(100); | |
309 | if (time_after(jiffies, timeout)) { | |
0e4e06ae | 310 | pr_err("%s: timeout with val=%02x, target_mask=%02x, target=%02x\n", |
d2b21f19 CM |
311 | __func__, val, target_mask, target); |
312 | return -ETIMEDOUT; | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
8973a6e7 RD |
317 | /* |
318 | * Read 16 bits from an SPI register until you receive a specific value. | |
319 | * Returns -ETIMEDOUT if a 4 tries pass without success. | |
320 | */ | |
d2b21f19 CM |
321 | static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target) |
322 | { | |
323 | int err, try; | |
324 | for (try = 0; try < 4; ++try) { | |
325 | u32 val = 0; | |
326 | err = spu_read_u32(card, reg, &val); | |
327 | if (err) | |
328 | return err; | |
329 | if (val == target) | |
330 | return 0; | |
331 | mdelay(100); | |
332 | } | |
333 | return -ETIMEDOUT; | |
334 | } | |
335 | ||
336 | static int spu_set_interrupt_mode(struct if_spi_card *card, | |
337 | int suppress_host_int, | |
338 | int auto_int) | |
339 | { | |
340 | int err = 0; | |
341 | ||
8973a6e7 RD |
342 | /* |
343 | * We can suppress a host interrupt by clearing the appropriate | |
344 | * bit in the "host interrupt status mask" register | |
345 | */ | |
d2b21f19 CM |
346 | if (suppress_host_int) { |
347 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
348 | if (err) | |
349 | return err; | |
350 | } else { | |
351 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, | |
352 | IF_SPI_HISM_TX_DOWNLOAD_RDY | | |
353 | IF_SPI_HISM_RX_UPLOAD_RDY | | |
354 | IF_SPI_HISM_CMD_DOWNLOAD_RDY | | |
355 | IF_SPI_HISM_CARDEVENT | | |
356 | IF_SPI_HISM_CMD_UPLOAD_RDY); | |
357 | if (err) | |
358 | return err; | |
359 | } | |
360 | ||
8973a6e7 RD |
361 | /* |
362 | * If auto-interrupts are on, the completion of certain transactions | |
d2b21f19 CM |
363 | * will trigger an interrupt automatically. If auto-interrupts |
364 | * are off, we need to set the "Card Interrupt Cause" register to | |
8973a6e7 RD |
365 | * trigger a card interrupt. |
366 | */ | |
d2b21f19 CM |
367 | if (auto_int) { |
368 | err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG, | |
369 | IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO | | |
370 | IF_SPI_HICT_RX_UPLOAD_OVER_AUTO | | |
371 | IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO | | |
372 | IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO); | |
373 | if (err) | |
374 | return err; | |
375 | } else { | |
376 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
377 | if (err) | |
378 | return err; | |
379 | } | |
380 | return err; | |
381 | } | |
382 | ||
383 | static int spu_get_chip_revision(struct if_spi_card *card, | |
384 | u16 *card_id, u8 *card_rev) | |
385 | { | |
386 | int err = 0; | |
387 | u32 dev_ctrl; | |
388 | err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl); | |
389 | if (err) | |
390 | return err; | |
391 | *card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl); | |
392 | *card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl); | |
393 | return err; | |
394 | } | |
395 | ||
396 | static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) | |
397 | { | |
398 | int err = 0; | |
399 | u16 rval; | |
400 | /* set bus mode */ | |
401 | err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode); | |
402 | if (err) | |
403 | return err; | |
404 | /* Check that we were able to read back what we just wrote. */ | |
405 | err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); | |
406 | if (err) | |
407 | return err; | |
88d89526 | 408 | if ((rval & 0xF) != mode) { |
0e4e06ae | 409 | pr_err("Can't read bus mode register\n"); |
d2b21f19 CM |
410 | return -EIO; |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int spu_init(struct if_spi_card *card, int use_dummy_writes) | |
416 | { | |
417 | int err = 0; | |
418 | u32 delay; | |
419 | ||
8973a6e7 RD |
420 | /* |
421 | * We have to start up in timed delay mode so that we can safely | |
422 | * read the Delay Read Register. | |
423 | */ | |
d2b21f19 CM |
424 | card->use_dummy_writes = 0; |
425 | err = spu_set_bus_mode(card, | |
426 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
427 | IF_SPI_BUS_MODE_DELAY_METHOD_TIMED | | |
428 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
429 | if (err) | |
430 | return err; | |
431 | card->spu_port_delay = 1000; | |
432 | card->spu_reg_delay = 1000; | |
433 | err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay); | |
434 | if (err) | |
435 | return err; | |
436 | card->spu_port_delay = delay & 0x0000ffff; | |
437 | card->spu_reg_delay = (delay & 0xffff0000) >> 16; | |
438 | ||
439 | /* If dummy clock delay mode has been requested, switch to it now */ | |
440 | if (use_dummy_writes) { | |
441 | card->use_dummy_writes = 1; | |
442 | err = spu_set_bus_mode(card, | |
443 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
444 | IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK | | |
445 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
446 | if (err) | |
447 | return err; | |
448 | } | |
449 | ||
450 | lbs_deb_spi("Initialized SPU unit. " | |
451 | "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n", | |
452 | card->spu_port_delay, card->spu_reg_delay); | |
453 | return err; | |
454 | } | |
455 | ||
456 | /* | |
457 | * Firmware Loading | |
458 | */ | |
459 | ||
915a824e DW |
460 | static int if_spi_prog_helper_firmware(struct if_spi_card *card, |
461 | const struct firmware *firmware) | |
d2b21f19 CM |
462 | { |
463 | int err = 0; | |
d2b21f19 CM |
464 | int bytes_remaining; |
465 | const u8 *fw; | |
466 | u8 temp[HELPER_FW_LOAD_CHUNK_SZ]; | |
d2b21f19 CM |
467 | |
468 | lbs_deb_enter(LBS_DEB_SPI); | |
469 | ||
470 | err = spu_set_interrupt_mode(card, 1, 0); | |
471 | if (err) | |
472 | goto out; | |
915a824e | 473 | |
d2b21f19 CM |
474 | bytes_remaining = firmware->size; |
475 | fw = firmware->data; | |
476 | ||
477 | /* Load helper firmware image */ | |
478 | while (bytes_remaining > 0) { | |
8973a6e7 RD |
479 | /* |
480 | * Scratch pad 1 should contain the number of bytes we | |
481 | * want to download to the firmware | |
482 | */ | |
d2b21f19 CM |
483 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, |
484 | HELPER_FW_LOAD_CHUNK_SZ); | |
485 | if (err) | |
915a824e | 486 | goto out; |
d2b21f19 CM |
487 | |
488 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
489 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
490 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
491 | if (err) | |
915a824e | 492 | goto out; |
d2b21f19 | 493 | |
8973a6e7 RD |
494 | /* |
495 | * Feed the data into the command read/write port reg | |
496 | * in chunks of 64 bytes | |
497 | */ | |
d2b21f19 CM |
498 | memset(temp, 0, sizeof(temp)); |
499 | memcpy(temp, fw, | |
500 | min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ)); | |
501 | mdelay(10); | |
502 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
503 | temp, HELPER_FW_LOAD_CHUNK_SZ); | |
504 | if (err) | |
915a824e | 505 | goto out; |
d2b21f19 CM |
506 | |
507 | /* Interrupt the boot code */ | |
508 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
509 | if (err) | |
915a824e | 510 | goto out; |
d2b21f19 CM |
511 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, |
512 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
513 | if (err) | |
915a824e | 514 | goto out; |
d2b21f19 CM |
515 | bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ; |
516 | fw += HELPER_FW_LOAD_CHUNK_SZ; | |
517 | } | |
518 | ||
8973a6e7 RD |
519 | /* |
520 | * Once the helper / single stage firmware download is complete, | |
d2b21f19 | 521 | * write 0 to scratch pad 1 and interrupt the |
8973a6e7 RD |
522 | * bootloader. This completes the helper download. |
523 | */ | |
d2b21f19 CM |
524 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK); |
525 | if (err) | |
915a824e | 526 | goto out; |
d2b21f19 CM |
527 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); |
528 | if (err) | |
915a824e | 529 | goto out; |
d2b21f19 CM |
530 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, |
531 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
915a824e | 532 | goto out; |
d2b21f19 CM |
533 | |
534 | lbs_deb_spi("waiting for helper to boot...\n"); | |
535 | ||
d2b21f19 CM |
536 | out: |
537 | if (err) | |
0e4e06ae | 538 | pr_err("failed to load helper firmware (err=%d)\n", err); |
d2b21f19 CM |
539 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); |
540 | return err; | |
541 | } | |
542 | ||
8973a6e7 RD |
543 | /* |
544 | * Returns the length of the next packet the firmware expects us to send. | |
545 | * Sets crc_err if the previous transfer had a CRC error. | |
546 | */ | |
d2b21f19 CM |
547 | static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card, |
548 | int *crc_err) | |
549 | { | |
550 | u16 len; | |
551 | int err = 0; | |
552 | ||
8973a6e7 RD |
553 | /* |
554 | * wait until the host interrupt status register indicates | |
555 | * that we are ready to download | |
556 | */ | |
d2b21f19 CM |
557 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, |
558 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
559 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
560 | if (err) { | |
0e4e06ae | 561 | pr_err("timed out waiting for host_int_status\n"); |
d2b21f19 CM |
562 | return err; |
563 | } | |
564 | ||
565 | /* Ask the device how many bytes of firmware it wants. */ | |
566 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
567 | if (err) | |
568 | return err; | |
569 | ||
570 | if (len > IF_SPI_CMD_BUF_SIZE) { | |
0e4e06ae JP |
571 | pr_err("firmware load device requested a larger transfer than we are prepared to handle (len = %d)\n", |
572 | len); | |
d2b21f19 CM |
573 | return -EIO; |
574 | } | |
575 | if (len & 0x1) { | |
576 | lbs_deb_spi("%s: crc error\n", __func__); | |
577 | len &= ~0x1; | |
578 | *crc_err = 1; | |
579 | } else | |
580 | *crc_err = 0; | |
581 | ||
582 | return len; | |
583 | } | |
584 | ||
915a824e DW |
585 | static int if_spi_prog_main_firmware(struct if_spi_card *card, |
586 | const struct firmware *firmware) | |
d2b21f19 | 587 | { |
f3a57fd1 | 588 | struct lbs_private *priv = card->priv; |
d2b21f19 CM |
589 | int len, prev_len; |
590 | int bytes, crc_err = 0, err = 0; | |
d2b21f19 | 591 | const u8 *fw; |
d2b21f19 CM |
592 | u16 num_crc_errs; |
593 | ||
594 | lbs_deb_enter(LBS_DEB_SPI); | |
595 | ||
596 | err = spu_set_interrupt_mode(card, 1, 0); | |
597 | if (err) | |
598 | goto out; | |
599 | ||
d2b21f19 CM |
600 | err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0); |
601 | if (err) { | |
f3a57fd1 JP |
602 | netdev_err(priv->dev, |
603 | "%s: timed out waiting for initial scratch reg = 0\n", | |
604 | __func__); | |
915a824e | 605 | goto out; |
d2b21f19 CM |
606 | } |
607 | ||
608 | num_crc_errs = 0; | |
609 | prev_len = 0; | |
610 | bytes = firmware->size; | |
611 | fw = firmware->data; | |
612 | while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) { | |
613 | if (len < 0) { | |
614 | err = len; | |
915a824e | 615 | goto out; |
d2b21f19 CM |
616 | } |
617 | if (bytes < 0) { | |
8973a6e7 RD |
618 | /* |
619 | * If there are no more bytes left, we would normally | |
620 | * expect to have terminated with len = 0 | |
621 | */ | |
f3a57fd1 JP |
622 | netdev_err(priv->dev, |
623 | "Firmware load wants more bytes than we have to offer.\n"); | |
d2b21f19 CM |
624 | break; |
625 | } | |
626 | if (crc_err) { | |
627 | /* Previous transfer failed. */ | |
628 | if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) { | |
0e4e06ae | 629 | pr_err("Too many CRC errors encountered in firmware load.\n"); |
d2b21f19 | 630 | err = -EIO; |
915a824e | 631 | goto out; |
d2b21f19 CM |
632 | } |
633 | } else { | |
634 | /* Previous transfer succeeded. Advance counters. */ | |
635 | bytes -= prev_len; | |
636 | fw += prev_len; | |
637 | } | |
638 | if (bytes < len) { | |
639 | memset(card->cmd_buffer, 0, len); | |
640 | memcpy(card->cmd_buffer, fw, bytes); | |
641 | } else | |
642 | memcpy(card->cmd_buffer, fw, len); | |
643 | ||
644 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
645 | if (err) | |
915a824e | 646 | goto out; |
d2b21f19 CM |
647 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, |
648 | card->cmd_buffer, len); | |
649 | if (err) | |
915a824e | 650 | goto out; |
d2b21f19 CM |
651 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG , |
652 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
653 | if (err) | |
915a824e | 654 | goto out; |
d2b21f19 CM |
655 | prev_len = len; |
656 | } | |
657 | if (bytes > prev_len) { | |
0e4e06ae | 658 | pr_err("firmware load wants fewer bytes than we have to offer\n"); |
d2b21f19 CM |
659 | } |
660 | ||
661 | /* Confirm firmware download */ | |
662 | err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG, | |
663 | SUCCESSFUL_FW_DOWNLOAD_MAGIC); | |
664 | if (err) { | |
0e4e06ae | 665 | pr_err("failed to confirm the firmware download\n"); |
915a824e | 666 | goto out; |
d2b21f19 CM |
667 | } |
668 | ||
d2b21f19 CM |
669 | out: |
670 | if (err) | |
0e4e06ae | 671 | pr_err("failed to load firmware (err=%d)\n", err); |
d2b21f19 CM |
672 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err); |
673 | return err; | |
674 | } | |
675 | ||
676 | /* | |
677 | * SPI Transfer Thread | |
678 | * | |
16f775be | 679 | * The SPI worker handles all SPI transfers, so there is no need for a lock. |
d2b21f19 CM |
680 | */ |
681 | ||
682 | /* Move a command from the card to the host */ | |
683 | static int if_spi_c2h_cmd(struct if_spi_card *card) | |
684 | { | |
685 | struct lbs_private *priv = card->priv; | |
686 | unsigned long flags; | |
687 | int err = 0; | |
688 | u16 len; | |
689 | u8 i; | |
690 | ||
8973a6e7 RD |
691 | /* |
692 | * We need a buffer big enough to handle whatever people send to | |
693 | * hw_host_to_card | |
694 | */ | |
d2b21f19 CM |
695 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE); |
696 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE); | |
697 | ||
8973a6e7 RD |
698 | /* |
699 | * It's just annoying if the buffer size isn't a multiple of 4, because | |
700 | * then we might have len < IF_SPI_CMD_BUF_SIZE but | |
701 | * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE | |
702 | */ | |
d2b21f19 CM |
703 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0); |
704 | ||
705 | lbs_deb_enter(LBS_DEB_SPI); | |
706 | ||
707 | /* How many bytes are there to read? */ | |
708 | err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len); | |
709 | if (err) | |
710 | goto out; | |
711 | if (!len) { | |
f3a57fd1 JP |
712 | netdev_err(priv->dev, "%s: error: card has no data for host\n", |
713 | __func__); | |
d2b21f19 CM |
714 | err = -EINVAL; |
715 | goto out; | |
716 | } else if (len > IF_SPI_CMD_BUF_SIZE) { | |
f3a57fd1 JP |
717 | netdev_err(priv->dev, |
718 | "%s: error: response packet too large: %d bytes, but maximum is %d\n", | |
719 | __func__, len, IF_SPI_CMD_BUF_SIZE); | |
d2b21f19 CM |
720 | err = -EINVAL; |
721 | goto out; | |
722 | } | |
723 | ||
724 | /* Read the data from the WLAN module into our command buffer */ | |
725 | err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG, | |
726 | card->cmd_buffer, ALIGN(len, 4)); | |
727 | if (err) | |
728 | goto out; | |
729 | ||
730 | spin_lock_irqsave(&priv->driver_lock, flags); | |
731 | i = (priv->resp_idx == 0) ? 1 : 0; | |
732 | BUG_ON(priv->resp_len[i]); | |
733 | priv->resp_len[i] = len; | |
734 | memcpy(priv->resp_buf[i], card->cmd_buffer, len); | |
735 | lbs_notify_command_response(priv, i); | |
736 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
737 | ||
738 | out: | |
739 | if (err) | |
f3a57fd1 | 740 | netdev_err(priv->dev, "%s: err=%d\n", __func__, err); |
d2b21f19 CM |
741 | lbs_deb_leave(LBS_DEB_SPI); |
742 | return err; | |
743 | } | |
744 | ||
745 | /* Move data from the card to the host */ | |
746 | static int if_spi_c2h_data(struct if_spi_card *card) | |
747 | { | |
f3a57fd1 | 748 | struct lbs_private *priv = card->priv; |
d2b21f19 CM |
749 | struct sk_buff *skb; |
750 | char *data; | |
751 | u16 len; | |
752 | int err = 0; | |
753 | ||
754 | lbs_deb_enter(LBS_DEB_SPI); | |
755 | ||
756 | /* How many bytes are there to read? */ | |
757 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
758 | if (err) | |
759 | goto out; | |
760 | if (!len) { | |
f3a57fd1 JP |
761 | netdev_err(priv->dev, "%s: error: card has no data for host\n", |
762 | __func__); | |
d2b21f19 CM |
763 | err = -EINVAL; |
764 | goto out; | |
765 | } else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
f3a57fd1 JP |
766 | netdev_err(priv->dev, |
767 | "%s: error: card has %d bytes of data, but our maximum skb size is %zu\n", | |
768 | __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
d2b21f19 CM |
769 | err = -EINVAL; |
770 | goto out; | |
771 | } | |
772 | ||
773 | /* TODO: should we allocate a smaller skb if we have less data? */ | |
774 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
775 | if (!skb) { | |
776 | err = -ENOBUFS; | |
777 | goto out; | |
778 | } | |
779 | skb_reserve(skb, IPFIELD_ALIGN_OFFSET); | |
780 | data = skb_put(skb, len); | |
781 | ||
782 | /* Read the data from the WLAN module into our skb... */ | |
783 | err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); | |
784 | if (err) | |
785 | goto free_skb; | |
786 | ||
787 | /* pass the SKB to libertas */ | |
788 | err = lbs_process_rxed_packet(card->priv, skb); | |
789 | if (err) | |
790 | goto free_skb; | |
791 | ||
792 | /* success */ | |
793 | goto out; | |
794 | ||
795 | free_skb: | |
796 | dev_kfree_skb(skb); | |
797 | out: | |
798 | if (err) | |
f3a57fd1 | 799 | netdev_err(priv->dev, "%s: err=%d\n", __func__, err); |
d2b21f19 CM |
800 | lbs_deb_leave(LBS_DEB_SPI); |
801 | return err; | |
802 | } | |
803 | ||
16f775be VK |
804 | /* Move data or a command from the host to the card. */ |
805 | static void if_spi_h2c(struct if_spi_card *card, | |
806 | struct if_spi_packet *packet, int type) | |
807 | { | |
f3a57fd1 | 808 | struct lbs_private *priv = card->priv; |
16f775be VK |
809 | int err = 0; |
810 | u16 int_type, port_reg; | |
811 | ||
812 | switch (type) { | |
813 | case MVMS_DAT: | |
814 | int_type = IF_SPI_CIC_TX_DOWNLOAD_OVER; | |
815 | port_reg = IF_SPI_DATA_RDWRPORT_REG; | |
816 | break; | |
817 | case MVMS_CMD: | |
818 | int_type = IF_SPI_CIC_CMD_DOWNLOAD_OVER; | |
819 | port_reg = IF_SPI_CMD_RDWRPORT_REG; | |
820 | break; | |
821 | default: | |
f3a57fd1 JP |
822 | netdev_err(priv->dev, "can't transfer buffer of type %d\n", |
823 | type); | |
16f775be VK |
824 | err = -EINVAL; |
825 | goto out; | |
826 | } | |
827 | ||
828 | /* Write the data to the card */ | |
829 | err = spu_write(card, port_reg, packet->buffer, packet->blen); | |
830 | if (err) | |
831 | goto out; | |
832 | ||
833 | out: | |
834 | kfree(packet); | |
835 | ||
836 | if (err) | |
f3a57fd1 | 837 | netdev_err(priv->dev, "%s: error %d\n", __func__, err); |
16f775be VK |
838 | } |
839 | ||
d2b21f19 CM |
840 | /* Inform the host about a card event */ |
841 | static void if_spi_e2h(struct if_spi_card *card) | |
842 | { | |
843 | int err = 0; | |
d2b21f19 CM |
844 | u32 cause; |
845 | struct lbs_private *priv = card->priv; | |
846 | ||
847 | err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause); | |
848 | if (err) | |
849 | goto out; | |
850 | ||
ea2d0639 | 851 | /* re-enable the card event interrupt */ |
852 | spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
853 | ~IF_SPI_HICU_CARD_EVENT); | |
854 | ||
855 | /* generate a card interrupt */ | |
856 | spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT); | |
857 | ||
d2b21f19 | 858 | lbs_queue_event(priv, cause & 0xff); |
d2b21f19 CM |
859 | out: |
860 | if (err) | |
f3a57fd1 | 861 | netdev_err(priv->dev, "%s: error %d\n", __func__, err); |
d2b21f19 CM |
862 | } |
863 | ||
16f775be | 864 | static void if_spi_host_to_card_worker(struct work_struct *work) |
d2b21f19 CM |
865 | { |
866 | int err; | |
16f775be | 867 | struct if_spi_card *card; |
d2b21f19 | 868 | u16 hiStatus; |
16f775be VK |
869 | unsigned long flags; |
870 | struct if_spi_packet *packet; | |
f3a57fd1 | 871 | struct lbs_private *priv; |
d2b21f19 | 872 | |
16f775be | 873 | card = container_of(work, struct if_spi_card, packet_work); |
f3a57fd1 | 874 | priv = card->priv; |
d2b21f19 | 875 | |
16f775be VK |
876 | lbs_deb_enter(LBS_DEB_SPI); |
877 | ||
8973a6e7 RD |
878 | /* |
879 | * Read the host interrupt status register to see what we | |
880 | * can do. | |
881 | */ | |
16f775be VK |
882 | err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG, |
883 | &hiStatus); | |
884 | if (err) { | |
f3a57fd1 | 885 | netdev_err(priv->dev, "I/O error\n"); |
16f775be VK |
886 | goto err; |
887 | } | |
888 | ||
889 | if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) { | |
890 | err = if_spi_c2h_cmd(card); | |
891 | if (err) | |
d2b21f19 | 892 | goto err; |
16f775be VK |
893 | } |
894 | if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) { | |
895 | err = if_spi_c2h_data(card); | |
896 | if (err) | |
897 | goto err; | |
898 | } | |
d2b21f19 | 899 | |
8973a6e7 RD |
900 | /* |
901 | * workaround: in PS mode, the card does not set the Command | |
902 | * Download Ready bit, but it sets TX Download Ready. | |
903 | */ | |
16f775be VK |
904 | if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY || |
905 | (card->priv->psstate != PS_STATE_FULL_POWER && | |
906 | (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) { | |
8973a6e7 RD |
907 | /* |
908 | * This means two things. First of all, | |
16f775be VK |
909 | * if there was a previous command sent, the card has |
910 | * successfully received it. | |
911 | * Secondly, it is now ready to download another | |
912 | * command. | |
913 | */ | |
914 | lbs_host_to_card_done(card->priv); | |
915 | ||
8973a6e7 | 916 | /* Do we have any command packets from the host to send? */ |
16f775be VK |
917 | packet = NULL; |
918 | spin_lock_irqsave(&card->buffer_lock, flags); | |
919 | if (!list_empty(&card->cmd_packet_list)) { | |
920 | packet = (struct if_spi_packet *)(card-> | |
921 | cmd_packet_list.next); | |
922 | list_del(&packet->list); | |
2674f82d | 923 | } |
16f775be | 924 | spin_unlock_irqrestore(&card->buffer_lock, flags); |
b3781c74 | 925 | |
16f775be VK |
926 | if (packet) |
927 | if_spi_h2c(card, packet, MVMS_CMD); | |
928 | } | |
929 | if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) { | |
8973a6e7 | 930 | /* Do we have any data packets from the host to send? */ |
16f775be VK |
931 | packet = NULL; |
932 | spin_lock_irqsave(&card->buffer_lock, flags); | |
933 | if (!list_empty(&card->data_packet_list)) { | |
934 | packet = (struct if_spi_packet *)(card-> | |
935 | data_packet_list.next); | |
936 | list_del(&packet->list); | |
d2b21f19 | 937 | } |
16f775be | 938 | spin_unlock_irqrestore(&card->buffer_lock, flags); |
d2b21f19 | 939 | |
16f775be VK |
940 | if (packet) |
941 | if_spi_h2c(card, packet, MVMS_DAT); | |
942 | } | |
943 | if (hiStatus & IF_SPI_HIST_CARD_EVENT) | |
944 | if_spi_e2h(card); | |
d2b21f19 CM |
945 | |
946 | err: | |
16f775be | 947 | if (err) |
f3a57fd1 | 948 | netdev_err(priv->dev, "%s: got error %d\n", __func__, err); |
d2b21f19 | 949 | |
16f775be | 950 | lbs_deb_leave(LBS_DEB_SPI); |
d2b21f19 CM |
951 | } |
952 | ||
953 | /* | |
954 | * Host to Card | |
955 | * | |
956 | * Called from Libertas to transfer some data to the WLAN device | |
8973a6e7 RD |
957 | * We can't sleep here. |
958 | */ | |
d2b21f19 CM |
959 | static int if_spi_host_to_card(struct lbs_private *priv, |
960 | u8 type, u8 *buf, u16 nb) | |
961 | { | |
962 | int err = 0; | |
16f775be | 963 | unsigned long flags; |
d2b21f19 | 964 | struct if_spi_card *card = priv->card; |
16f775be VK |
965 | struct if_spi_packet *packet; |
966 | u16 blen; | |
d2b21f19 CM |
967 | |
968 | lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb); | |
969 | ||
16f775be | 970 | if (nb == 0) { |
f3a57fd1 JP |
971 | netdev_err(priv->dev, "%s: invalid size requested: %d\n", |
972 | __func__, nb); | |
16f775be VK |
973 | err = -EINVAL; |
974 | goto out; | |
975 | } | |
976 | blen = ALIGN(nb, 4); | |
977 | packet = kzalloc(sizeof(struct if_spi_packet) + blen, GFP_ATOMIC); | |
978 | if (!packet) { | |
979 | err = -ENOMEM; | |
980 | goto out; | |
981 | } | |
982 | packet->blen = blen; | |
983 | memcpy(packet->buffer, buf, nb); | |
984 | memset(packet->buffer + nb, 0, blen - nb); | |
d2b21f19 CM |
985 | |
986 | switch (type) { | |
987 | case MVMS_CMD: | |
16f775be VK |
988 | priv->dnld_sent = DNLD_CMD_SENT; |
989 | spin_lock_irqsave(&card->buffer_lock, flags); | |
990 | list_add_tail(&packet->list, &card->cmd_packet_list); | |
991 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
d2b21f19 CM |
992 | break; |
993 | case MVMS_DAT: | |
16f775be VK |
994 | priv->dnld_sent = DNLD_DATA_SENT; |
995 | spin_lock_irqsave(&card->buffer_lock, flags); | |
996 | list_add_tail(&packet->list, &card->data_packet_list); | |
997 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
d2b21f19 CM |
998 | break; |
999 | default: | |
f3a57fd1 JP |
1000 | netdev_err(priv->dev, "can't transfer buffer of type %d\n", |
1001 | type); | |
d2b21f19 CM |
1002 | err = -EINVAL; |
1003 | break; | |
1004 | } | |
1005 | ||
16f775be VK |
1006 | /* Queue spi xfer work */ |
1007 | queue_work(card->workqueue, &card->packet_work); | |
1008 | out: | |
d2b21f19 CM |
1009 | lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err); |
1010 | return err; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Host Interrupts | |
1015 | * | |
1016 | * Service incoming interrupts from the WLAN device. We can't sleep here, so | |
16f775be | 1017 | * don't try to talk on the SPI bus, just queue the SPI xfer work. |
d2b21f19 CM |
1018 | */ |
1019 | static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id) | |
1020 | { | |
1021 | struct if_spi_card *card = dev_id; | |
1022 | ||
16f775be VK |
1023 | queue_work(card->workqueue, &card->packet_work); |
1024 | ||
d2b21f19 CM |
1025 | return IRQ_HANDLED; |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * SPI callbacks | |
1030 | */ | |
1031 | ||
16f775be | 1032 | static int if_spi_init_card(struct if_spi_card *card) |
d2b21f19 | 1033 | { |
f3a57fd1 | 1034 | struct lbs_private *priv = card->priv; |
16f775be VK |
1035 | struct spi_device *spi = card->spi; |
1036 | int err, i; | |
d2b21f19 | 1037 | u32 scratch; |
915a824e DW |
1038 | const struct firmware *helper = NULL; |
1039 | const struct firmware *mainfw = NULL; | |
d2b21f19 CM |
1040 | |
1041 | lbs_deb_enter(LBS_DEB_SPI); | |
1042 | ||
16f775be | 1043 | err = spu_init(card, card->pdata->use_dummy_writes); |
d2b21f19 | 1044 | if (err) |
16f775be | 1045 | goto out; |
d2b21f19 CM |
1046 | err = spu_get_chip_revision(card, &card->card_id, &card->card_rev); |
1047 | if (err) | |
16f775be | 1048 | goto out; |
d2b21f19 | 1049 | |
d2b21f19 CM |
1050 | err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch); |
1051 | if (err) | |
16f775be | 1052 | goto out; |
d2b21f19 CM |
1053 | if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC) |
1054 | lbs_deb_spi("Firmware is already loaded for " | |
1055 | "Marvell WLAN 802.11 adapter\n"); | |
1056 | else { | |
915a824e DW |
1057 | /* Check if we support this card */ |
1058 | for (i = 0; i < ARRAY_SIZE(fw_table); i++) { | |
1059 | if (card->card_id == fw_table[i].model) | |
1060 | break; | |
1061 | } | |
1062 | if (i == ARRAY_SIZE(fw_table)) { | |
f3a57fd1 JP |
1063 | netdev_err(priv->dev, "Unsupported chip_id: 0x%02x\n", |
1064 | card->card_id); | |
915a824e | 1065 | err = -ENODEV; |
16f775be | 1066 | goto out; |
915a824e DW |
1067 | } |
1068 | ||
1069 | err = lbs_get_firmware(&card->spi->dev, NULL, NULL, | |
1070 | card->card_id, &fw_table[0], &helper, | |
1071 | &mainfw); | |
1072 | if (err) { | |
f3a57fd1 JP |
1073 | netdev_err(priv->dev, "failed to find firmware (%d)\n", |
1074 | err); | |
16f775be | 1075 | goto out; |
915a824e | 1076 | } |
d2b21f19 CM |
1077 | |
1078 | lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter " | |
1079 | "(chip_id = 0x%04x, chip_rev = 0x%02x) " | |
1080 | "attached to SPI bus_num %d, chip_select %d. " | |
1081 | "spi->max_speed_hz=%d\n", | |
1082 | card->card_id, card->card_rev, | |
1083 | spi->master->bus_num, spi->chip_select, | |
1084 | spi->max_speed_hz); | |
915a824e | 1085 | err = if_spi_prog_helper_firmware(card, helper); |
d2b21f19 | 1086 | if (err) |
16f775be | 1087 | goto out; |
915a824e | 1088 | err = if_spi_prog_main_firmware(card, mainfw); |
d2b21f19 | 1089 | if (err) |
16f775be | 1090 | goto out; |
d2b21f19 CM |
1091 | lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n"); |
1092 | } | |
1093 | ||
1094 | err = spu_set_interrupt_mode(card, 0, 1); | |
16f775be VK |
1095 | if (err) |
1096 | goto out; | |
1097 | ||
1098 | out: | |
1099 | if (helper) | |
1100 | release_firmware(helper); | |
1101 | if (mainfw) | |
1102 | release_firmware(mainfw); | |
1103 | ||
1104 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1105 | ||
1106 | return err; | |
1107 | } | |
1108 | ||
f39de992 VK |
1109 | static void if_spi_resume_worker(struct work_struct *work) |
1110 | { | |
1111 | struct if_spi_card *card; | |
1112 | ||
1113 | card = container_of(work, struct if_spi_card, resume_work); | |
1114 | ||
1115 | if (card->suspended) { | |
1116 | if (card->pdata->setup) | |
1117 | card->pdata->setup(card->spi); | |
1118 | ||
1119 | /* Init card ... */ | |
1120 | if_spi_init_card(card); | |
1121 | ||
1122 | enable_irq(card->spi->irq); | |
1123 | ||
1124 | /* And resume it ... */ | |
1125 | lbs_resume(card->priv); | |
1126 | ||
1127 | card->suspended = 0; | |
1128 | } | |
1129 | } | |
1130 | ||
16f775be VK |
1131 | static int __devinit if_spi_probe(struct spi_device *spi) |
1132 | { | |
1133 | struct if_spi_card *card; | |
1134 | struct lbs_private *priv = NULL; | |
1135 | struct libertas_spi_platform_data *pdata = spi->dev.platform_data; | |
1136 | int err = 0; | |
1137 | ||
1138 | lbs_deb_enter(LBS_DEB_SPI); | |
1139 | ||
1140 | if (!pdata) { | |
1141 | err = -EINVAL; | |
1142 | goto out; | |
1143 | } | |
1144 | ||
1145 | if (pdata->setup) { | |
1146 | err = pdata->setup(spi); | |
1147 | if (err) | |
1148 | goto out; | |
1149 | } | |
1150 | ||
1151 | /* Allocate card structure to represent this specific device */ | |
1152 | card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL); | |
1153 | if (!card) { | |
1154 | err = -ENOMEM; | |
1155 | goto teardown; | |
1156 | } | |
1157 | spi_set_drvdata(spi, card); | |
1158 | card->pdata = pdata; | |
1159 | card->spi = spi; | |
1160 | card->prev_xfer_time = jiffies; | |
1161 | ||
1162 | INIT_LIST_HEAD(&card->cmd_packet_list); | |
1163 | INIT_LIST_HEAD(&card->data_packet_list); | |
1164 | spin_lock_init(&card->buffer_lock); | |
1165 | ||
1166 | /* Initialize the SPI Interface Unit */ | |
1167 | ||
1168 | /* Firmware load */ | |
1169 | err = if_spi_init_card(card); | |
d2b21f19 | 1170 | if (err) |
4d1d4985 | 1171 | goto free_card; |
d2b21f19 | 1172 | |
8973a6e7 RD |
1173 | /* |
1174 | * Register our card with libertas. | |
1175 | * This will call alloc_etherdev. | |
1176 | */ | |
d2b21f19 CM |
1177 | priv = lbs_add_card(card, &spi->dev); |
1178 | if (!priv) { | |
1179 | err = -ENOMEM; | |
4d1d4985 | 1180 | goto free_card; |
d2b21f19 CM |
1181 | } |
1182 | card->priv = priv; | |
f39de992 | 1183 | priv->setup_fw_on_resume = 1; |
d2b21f19 CM |
1184 | priv->card = card; |
1185 | priv->hw_host_to_card = if_spi_host_to_card; | |
49125454 AK |
1186 | priv->enter_deep_sleep = NULL; |
1187 | priv->exit_deep_sleep = NULL; | |
1188 | priv->reset_deep_sleep_wakeup = NULL; | |
d2b21f19 | 1189 | priv->fw_ready = 1; |
d2b21f19 CM |
1190 | |
1191 | /* Initialize interrupt handling stuff. */ | |
16f775be VK |
1192 | card->workqueue = create_workqueue("libertas_spi"); |
1193 | INIT_WORK(&card->packet_work, if_spi_host_to_card_worker); | |
f39de992 | 1194 | INIT_WORK(&card->resume_work, if_spi_resume_worker); |
b26ed97c | 1195 | |
d2b21f19 CM |
1196 | err = request_irq(spi->irq, if_spi_host_interrupt, |
1197 | IRQF_TRIGGER_FALLING, "libertas_spi", card); | |
1198 | if (err) { | |
0e4e06ae | 1199 | pr_err("can't get host irq line-- request_irq failed\n"); |
16f775be | 1200 | goto terminate_workqueue; |
d2b21f19 CM |
1201 | } |
1202 | ||
8973a6e7 RD |
1203 | /* |
1204 | * Start the card. | |
d2b21f19 | 1205 | * This will call register_netdev, and we'll start |
8973a6e7 RD |
1206 | * getting interrupts... |
1207 | */ | |
d2b21f19 CM |
1208 | err = lbs_start_card(priv); |
1209 | if (err) | |
1210 | goto release_irq; | |
1211 | ||
1212 | lbs_deb_spi("Finished initializing WLAN module.\n"); | |
1213 | ||
1214 | /* successful exit */ | |
1215 | goto out; | |
1216 | ||
1217 | release_irq: | |
1218 | free_irq(spi->irq, card); | |
16f775be VK |
1219 | terminate_workqueue: |
1220 | flush_workqueue(card->workqueue); | |
1221 | destroy_workqueue(card->workqueue); | |
d2b21f19 | 1222 | lbs_remove_card(priv); /* will call free_netdev */ |
d2b21f19 CM |
1223 | free_card: |
1224 | free_if_spi_card(card); | |
16f775be VK |
1225 | teardown: |
1226 | if (pdata->teardown) | |
1227 | pdata->teardown(spi); | |
d2b21f19 CM |
1228 | out: |
1229 | lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err); | |
1230 | return err; | |
1231 | } | |
1232 | ||
1233 | static int __devexit libertas_spi_remove(struct spi_device *spi) | |
1234 | { | |
1235 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1236 | struct lbs_private *priv = card->priv; | |
1237 | ||
1238 | lbs_deb_spi("libertas_spi_remove\n"); | |
1239 | lbs_deb_enter(LBS_DEB_SPI); | |
d2b21f19 | 1240 | |
f39de992 VK |
1241 | cancel_work_sync(&card->resume_work); |
1242 | ||
d2b21f19 | 1243 | lbs_stop_card(priv); |
efcfd1f2 AY |
1244 | lbs_remove_card(priv); /* will call free_netdev */ |
1245 | ||
d2b21f19 | 1246 | free_irq(spi->irq, card); |
16f775be VK |
1247 | flush_workqueue(card->workqueue); |
1248 | destroy_workqueue(card->workqueue); | |
0c2bec96 MR |
1249 | if (card->pdata->teardown) |
1250 | card->pdata->teardown(spi); | |
d2b21f19 CM |
1251 | free_if_spi_card(card); |
1252 | lbs_deb_leave(LBS_DEB_SPI); | |
1253 | return 0; | |
1254 | } | |
1255 | ||
f39de992 VK |
1256 | static int if_spi_suspend(struct device *dev) |
1257 | { | |
1258 | struct spi_device *spi = to_spi_device(dev); | |
1259 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1260 | ||
1261 | if (!card->suspended) { | |
1262 | lbs_suspend(card->priv); | |
1263 | flush_workqueue(card->workqueue); | |
1264 | disable_irq(spi->irq); | |
1265 | ||
1266 | if (card->pdata->teardown) | |
1267 | card->pdata->teardown(spi); | |
1268 | card->suspended = 1; | |
1269 | } | |
1270 | ||
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static int if_spi_resume(struct device *dev) | |
1275 | { | |
1276 | struct spi_device *spi = to_spi_device(dev); | |
1277 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1278 | ||
1279 | /* Schedule delayed work */ | |
1280 | schedule_work(&card->resume_work); | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static const struct dev_pm_ops if_spi_pm_ops = { | |
1286 | .suspend = if_spi_suspend, | |
1287 | .resume = if_spi_resume, | |
1288 | }; | |
1289 | ||
d2b21f19 CM |
1290 | static struct spi_driver libertas_spi_driver = { |
1291 | .probe = if_spi_probe, | |
1292 | .remove = __devexit_p(libertas_spi_remove), | |
1293 | .driver = { | |
1294 | .name = "libertas_spi", | |
1295 | .bus = &spi_bus_type, | |
1296 | .owner = THIS_MODULE, | |
f39de992 | 1297 | .pm = &if_spi_pm_ops, |
d2b21f19 CM |
1298 | }, |
1299 | }; | |
1300 | ||
1301 | /* | |
1302 | * Module functions | |
1303 | */ | |
1304 | ||
1305 | static int __init if_spi_init_module(void) | |
1306 | { | |
1307 | int ret = 0; | |
1308 | lbs_deb_enter(LBS_DEB_SPI); | |
1309 | printk(KERN_INFO "libertas_spi: Libertas SPI driver\n"); | |
1310 | ret = spi_register_driver(&libertas_spi_driver); | |
1311 | lbs_deb_leave(LBS_DEB_SPI); | |
1312 | return ret; | |
1313 | } | |
1314 | ||
1315 | static void __exit if_spi_exit_module(void) | |
1316 | { | |
1317 | lbs_deb_enter(LBS_DEB_SPI); | |
1318 | spi_unregister_driver(&libertas_spi_driver); | |
1319 | lbs_deb_leave(LBS_DEB_SPI); | |
1320 | } | |
1321 | ||
1322 | module_init(if_spi_init_module); | |
1323 | module_exit(if_spi_exit_module); | |
1324 | ||
1325 | MODULE_DESCRIPTION("Libertas SPI WLAN Driver"); | |
1326 | MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, " | |
1327 | "Colin McCabe <colin@cozybit.com>"); | |
1328 | MODULE_LICENSE("GPL"); | |
e0626e38 | 1329 | MODULE_ALIAS("spi:libertas_spi"); |