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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d2b21f19 CM |
2 | /* |
3 | * linux/drivers/net/wireless/libertas/if_spi.c | |
4 | * | |
5 | * Driver for Marvell SPI WLAN cards. | |
6 | * | |
7 | * Copyright 2008 Analog Devices Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Andrey Yurovsky <andrey@cozybit.com> | |
11 | * Colin McCabe <colin@cozybit.com> | |
12 | * | |
13 | * Inspired by if_sdio.c, Copyright 2007-2008 Pierre Ossman | |
d2b21f19 CM |
14 | */ |
15 | ||
0e4e06ae JP |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
17 | ||
a6b7a407 AD |
18 | #include <linux/hardirq.h> |
19 | #include <linux/interrupt.h> | |
ac5c24e9 | 20 | #include <linux/module.h> |
d2b21f19 | 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; | |
f39de992 | 60 | struct work_struct resume_work; |
d2b21f19 CM |
61 | |
62 | u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE]; | |
16f775be VK |
63 | |
64 | /* A buffer of incoming packets from libertas core. | |
65 | * Since we can't sleep in hw_host_to_card, we have to buffer | |
66 | * them. */ | |
67 | struct list_head cmd_packet_list; | |
68 | struct list_head data_packet_list; | |
69 | ||
70 | /* Protects cmd_packet_list and data_packet_list */ | |
71 | spinlock_t buffer_lock; | |
f39de992 VK |
72 | |
73 | /* True is card suspended */ | |
74 | u8 suspended; | |
d2b21f19 CM |
75 | }; |
76 | ||
77 | static void free_if_spi_card(struct if_spi_card *card) | |
78 | { | |
16f775be VK |
79 | struct list_head *cursor, *next; |
80 | struct if_spi_packet *packet; | |
81 | ||
82 | list_for_each_safe(cursor, next, &card->cmd_packet_list) { | |
83 | packet = container_of(cursor, struct if_spi_packet, list); | |
84 | list_del(&packet->list); | |
85 | kfree(packet); | |
86 | } | |
87 | list_for_each_safe(cursor, next, &card->data_packet_list) { | |
88 | packet = container_of(cursor, struct if_spi_packet, list); | |
89 | list_del(&packet->list); | |
90 | kfree(packet); | |
91 | } | |
d2b21f19 CM |
92 | kfree(card); |
93 | } | |
94 | ||
915a824e DW |
95 | #define MODEL_8385 0x04 |
96 | #define MODEL_8686 0x0b | |
97 | #define MODEL_8688 0x10 | |
98 | ||
99 | static const struct lbs_fw_table fw_table[] = { | |
100 | { MODEL_8385, "libertas/gspi8385_helper.bin", "libertas/gspi8385.bin" }, | |
101 | { MODEL_8385, "libertas/gspi8385_hlp.bin", "libertas/gspi8385.bin" }, | |
102 | { MODEL_8686, "libertas/gspi8686_v9_helper.bin", "libertas/gspi8686_v9.bin" }, | |
103 | { MODEL_8686, "libertas/gspi8686_hlp.bin", "libertas/gspi8686.bin" }, | |
104 | { MODEL_8688, "libertas/gspi8688_helper.bin", "libertas/gspi8688.bin" }, | |
105 | { 0, NULL, NULL } | |
d2b21f19 | 106 | }; |
915a824e DW |
107 | MODULE_FIRMWARE("libertas/gspi8385_helper.bin"); |
108 | MODULE_FIRMWARE("libertas/gspi8385_hlp.bin"); | |
109 | MODULE_FIRMWARE("libertas/gspi8385.bin"); | |
110 | MODULE_FIRMWARE("libertas/gspi8686_v9_helper.bin"); | |
111 | MODULE_FIRMWARE("libertas/gspi8686_v9.bin"); | |
112 | MODULE_FIRMWARE("libertas/gspi8686_hlp.bin"); | |
113 | MODULE_FIRMWARE("libertas/gspi8686.bin"); | |
114 | MODULE_FIRMWARE("libertas/gspi8688_helper.bin"); | |
115 | MODULE_FIRMWARE("libertas/gspi8688.bin"); | |
116 | ||
d2b21f19 CM |
117 | |
118 | /* | |
119 | * SPI Interface Unit Routines | |
120 | * | |
121 | * The SPU sits between the host and the WLAN module. | |
122 | * All communication with the firmware is through SPU transactions. | |
123 | * | |
124 | * First we have to put a SPU register name on the bus. Then we can | |
125 | * either read from or write to that register. | |
126 | * | |
d2b21f19 CM |
127 | */ |
128 | ||
129 | static void spu_transaction_init(struct if_spi_card *card) | |
130 | { | |
131 | if (!time_after(jiffies, card->prev_xfer_time + 1)) { | |
132 | /* Unfortunately, the SPU requires a delay between successive | |
133 | * transactions. If our last transaction was more than a jiffy | |
134 | * ago, we have obviously already delayed enough. | |
135 | * If not, we have to busy-wait to be on the safe side. */ | |
136 | ndelay(400); | |
137 | } | |
d2b21f19 CM |
138 | } |
139 | ||
140 | static void spu_transaction_finish(struct if_spi_card *card) | |
141 | { | |
d2b21f19 CM |
142 | card->prev_xfer_time = jiffies; |
143 | } | |
144 | ||
8973a6e7 RD |
145 | /* |
146 | * Write out a byte buffer to an SPI register, | |
147 | * using a series of 16-bit transfers. | |
148 | */ | |
d2b21f19 CM |
149 | static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) |
150 | { | |
151 | int err = 0; | |
d18ba452 | 152 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK); |
4d1d4985 SAS |
153 | struct spi_message m; |
154 | struct spi_transfer reg_trans; | |
155 | struct spi_transfer data_trans; | |
156 | ||
157 | spi_message_init(&m); | |
158 | memset(®_trans, 0, sizeof(reg_trans)); | |
159 | memset(&data_trans, 0, sizeof(data_trans)); | |
d2b21f19 CM |
160 | |
161 | /* You must give an even number of bytes to the SPU, even if it | |
162 | * doesn't care about the last one. */ | |
163 | BUG_ON(len & 0x1); | |
164 | ||
165 | spu_transaction_init(card); | |
166 | ||
167 | /* write SPU register index */ | |
4d1d4985 SAS |
168 | reg_trans.tx_buf = ®_out; |
169 | reg_trans.len = sizeof(reg_out); | |
d2b21f19 | 170 | |
4d1d4985 SAS |
171 | data_trans.tx_buf = buf; |
172 | data_trans.len = len; | |
d2b21f19 | 173 | |
4d1d4985 SAS |
174 | spi_message_add_tail(®_trans, &m); |
175 | spi_message_add_tail(&data_trans, &m); | |
176 | ||
177 | err = spi_sync(card->spi, &m); | |
d2b21f19 CM |
178 | spu_transaction_finish(card); |
179 | return err; | |
180 | } | |
181 | ||
182 | static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val) | |
183 | { | |
d18ba452 | 184 | __le16 buff; |
d2b21f19 | 185 | |
f488b72d SAS |
186 | buff = cpu_to_le16(val); |
187 | return spu_write(card, reg, (u8 *)&buff, sizeof(u16)); | |
d2b21f19 CM |
188 | } |
189 | ||
190 | static inline int spu_reg_is_port_reg(u16 reg) | |
191 | { | |
192 | switch (reg) { | |
193 | case IF_SPI_IO_RDWRPORT_REG: | |
194 | case IF_SPI_CMD_RDWRPORT_REG: | |
195 | case IF_SPI_DATA_RDWRPORT_REG: | |
196 | return 1; | |
197 | default: | |
198 | return 0; | |
199 | } | |
200 | } | |
201 | ||
202 | static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len) | |
203 | { | |
4d1d4985 | 204 | unsigned int delay; |
d2b21f19 | 205 | int err = 0; |
d18ba452 | 206 | __le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK); |
4d1d4985 SAS |
207 | struct spi_message m; |
208 | struct spi_transfer reg_trans; | |
209 | struct spi_transfer dummy_trans; | |
210 | struct spi_transfer data_trans; | |
d2b21f19 | 211 | |
8973a6e7 RD |
212 | /* |
213 | * You must take an even number of bytes from the SPU, even if you | |
214 | * don't care about the last one. | |
215 | */ | |
d2b21f19 CM |
216 | BUG_ON(len & 0x1); |
217 | ||
218 | spu_transaction_init(card); | |
219 | ||
4d1d4985 SAS |
220 | spi_message_init(&m); |
221 | memset(®_trans, 0, sizeof(reg_trans)); | |
222 | memset(&dummy_trans, 0, sizeof(dummy_trans)); | |
223 | memset(&data_trans, 0, sizeof(data_trans)); | |
224 | ||
d2b21f19 | 225 | /* write SPU register index */ |
4d1d4985 SAS |
226 | reg_trans.tx_buf = ®_out; |
227 | reg_trans.len = sizeof(reg_out); | |
228 | spi_message_add_tail(®_trans, &m); | |
d2b21f19 CM |
229 | |
230 | delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay : | |
231 | card->spu_reg_delay; | |
232 | if (card->use_dummy_writes) { | |
233 | /* Clock in dummy cycles while the SPU fills the FIFO */ | |
4d1d4985 SAS |
234 | dummy_trans.len = delay / 8; |
235 | spi_message_add_tail(&dummy_trans, &m); | |
d2b21f19 CM |
236 | } else { |
237 | /* Busy-wait while the SPU fills the FIFO */ | |
4d1d4985 SAS |
238 | reg_trans.delay_usecs = |
239 | DIV_ROUND_UP((100 + (delay * 10)), 1000); | |
d2b21f19 CM |
240 | } |
241 | ||
242 | /* read in data */ | |
4d1d4985 SAS |
243 | data_trans.rx_buf = buf; |
244 | data_trans.len = len; | |
245 | spi_message_add_tail(&data_trans, &m); | |
d2b21f19 | 246 | |
4d1d4985 | 247 | err = spi_sync(card->spi, &m); |
d2b21f19 CM |
248 | spu_transaction_finish(card); |
249 | return err; | |
250 | } | |
251 | ||
252 | /* Read 16 bits from an SPI register */ | |
253 | static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val) | |
254 | { | |
d18ba452 | 255 | __le16 buf; |
f488b72d SAS |
256 | int ret; |
257 | ||
258 | ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
259 | if (ret == 0) | |
260 | *val = le16_to_cpup(&buf); | |
261 | return ret; | |
d2b21f19 CM |
262 | } |
263 | ||
8973a6e7 RD |
264 | /* |
265 | * Read 32 bits from an SPI register. | |
266 | * The low 16 bits are read first. | |
267 | */ | |
d2b21f19 CM |
268 | static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val) |
269 | { | |
d18ba452 | 270 | __le32 buf; |
d2b21f19 | 271 | int err; |
f488b72d SAS |
272 | |
273 | err = spu_read(card, reg, (u8 *)&buf, sizeof(buf)); | |
d2b21f19 | 274 | if (!err) |
f488b72d | 275 | *val = le32_to_cpup(&buf); |
d2b21f19 CM |
276 | return err; |
277 | } | |
278 | ||
8973a6e7 RD |
279 | /* |
280 | * Keep reading 16 bits from an SPI register until you get the correct result. | |
d2b21f19 CM |
281 | * |
282 | * If mask = 0, the correct result is any non-zero number. | |
283 | * If mask != 0, the correct result is any number where | |
284 | * number & target_mask == target | |
285 | * | |
8973a6e7 RD |
286 | * Returns -ETIMEDOUT if a second passes without the correct result. |
287 | */ | |
d2b21f19 CM |
288 | static int spu_wait_for_u16(struct if_spi_card *card, u16 reg, |
289 | u16 target_mask, u16 target) | |
290 | { | |
291 | int err; | |
292 | unsigned long timeout = jiffies + 5*HZ; | |
293 | while (1) { | |
294 | u16 val; | |
295 | err = spu_read_u16(card, reg, &val); | |
296 | if (err) | |
297 | return err; | |
298 | if (target_mask) { | |
299 | if ((val & target_mask) == target) | |
300 | return 0; | |
301 | } else { | |
302 | if (val) | |
303 | return 0; | |
304 | } | |
305 | udelay(100); | |
306 | if (time_after(jiffies, timeout)) { | |
0e4e06ae | 307 | pr_err("%s: timeout with val=%02x, target_mask=%02x, target=%02x\n", |
d2b21f19 CM |
308 | __func__, val, target_mask, target); |
309 | return -ETIMEDOUT; | |
310 | } | |
311 | } | |
312 | } | |
313 | ||
8973a6e7 RD |
314 | /* |
315 | * Read 16 bits from an SPI register until you receive a specific value. | |
316 | * Returns -ETIMEDOUT if a 4 tries pass without success. | |
317 | */ | |
d2b21f19 CM |
318 | static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target) |
319 | { | |
320 | int err, try; | |
321 | for (try = 0; try < 4; ++try) { | |
322 | u32 val = 0; | |
323 | err = spu_read_u32(card, reg, &val); | |
324 | if (err) | |
325 | return err; | |
326 | if (val == target) | |
327 | return 0; | |
328 | mdelay(100); | |
329 | } | |
330 | return -ETIMEDOUT; | |
331 | } | |
332 | ||
333 | static int spu_set_interrupt_mode(struct if_spi_card *card, | |
334 | int suppress_host_int, | |
335 | int auto_int) | |
336 | { | |
337 | int err = 0; | |
338 | ||
8973a6e7 RD |
339 | /* |
340 | * We can suppress a host interrupt by clearing the appropriate | |
341 | * bit in the "host interrupt status mask" register | |
342 | */ | |
d2b21f19 CM |
343 | if (suppress_host_int) { |
344 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
345 | if (err) | |
346 | return err; | |
347 | } else { | |
348 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, | |
349 | IF_SPI_HISM_TX_DOWNLOAD_RDY | | |
350 | IF_SPI_HISM_RX_UPLOAD_RDY | | |
351 | IF_SPI_HISM_CMD_DOWNLOAD_RDY | | |
352 | IF_SPI_HISM_CARDEVENT | | |
353 | IF_SPI_HISM_CMD_UPLOAD_RDY); | |
354 | if (err) | |
355 | return err; | |
356 | } | |
357 | ||
8973a6e7 RD |
358 | /* |
359 | * If auto-interrupts are on, the completion of certain transactions | |
d2b21f19 CM |
360 | * will trigger an interrupt automatically. If auto-interrupts |
361 | * are off, we need to set the "Card Interrupt Cause" register to | |
8973a6e7 RD |
362 | * trigger a card interrupt. |
363 | */ | |
d2b21f19 CM |
364 | if (auto_int) { |
365 | err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG, | |
366 | IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO | | |
367 | IF_SPI_HICT_RX_UPLOAD_OVER_AUTO | | |
368 | IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO | | |
369 | IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO); | |
370 | if (err) | |
371 | return err; | |
372 | } else { | |
373 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0); | |
374 | if (err) | |
375 | return err; | |
376 | } | |
377 | return err; | |
378 | } | |
379 | ||
380 | static int spu_get_chip_revision(struct if_spi_card *card, | |
381 | u16 *card_id, u8 *card_rev) | |
382 | { | |
383 | int err = 0; | |
384 | u32 dev_ctrl; | |
385 | err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl); | |
386 | if (err) | |
387 | return err; | |
388 | *card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl); | |
389 | *card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl); | |
390 | return err; | |
391 | } | |
392 | ||
393 | static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) | |
394 | { | |
395 | int err = 0; | |
396 | u16 rval; | |
397 | /* set bus mode */ | |
398 | err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode); | |
399 | if (err) | |
400 | return err; | |
401 | /* Check that we were able to read back what we just wrote. */ | |
402 | err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); | |
403 | if (err) | |
404 | return err; | |
88d89526 | 405 | if ((rval & 0xF) != mode) { |
0e4e06ae | 406 | pr_err("Can't read bus mode register\n"); |
d2b21f19 CM |
407 | return -EIO; |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
412 | static int spu_init(struct if_spi_card *card, int use_dummy_writes) | |
413 | { | |
414 | int err = 0; | |
415 | u32 delay; | |
416 | ||
8973a6e7 RD |
417 | /* |
418 | * We have to start up in timed delay mode so that we can safely | |
419 | * read the Delay Read Register. | |
420 | */ | |
d2b21f19 CM |
421 | card->use_dummy_writes = 0; |
422 | err = spu_set_bus_mode(card, | |
423 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
424 | IF_SPI_BUS_MODE_DELAY_METHOD_TIMED | | |
425 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
426 | if (err) | |
427 | return err; | |
428 | card->spu_port_delay = 1000; | |
429 | card->spu_reg_delay = 1000; | |
430 | err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay); | |
431 | if (err) | |
432 | return err; | |
433 | card->spu_port_delay = delay & 0x0000ffff; | |
434 | card->spu_reg_delay = (delay & 0xffff0000) >> 16; | |
435 | ||
436 | /* If dummy clock delay mode has been requested, switch to it now */ | |
437 | if (use_dummy_writes) { | |
438 | card->use_dummy_writes = 1; | |
439 | err = spu_set_bus_mode(card, | |
440 | IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING | | |
441 | IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK | | |
442 | IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA); | |
443 | if (err) | |
444 | return err; | |
445 | } | |
446 | ||
447 | lbs_deb_spi("Initialized SPU unit. " | |
448 | "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n", | |
449 | card->spu_port_delay, card->spu_reg_delay); | |
450 | return err; | |
451 | } | |
452 | ||
453 | /* | |
454 | * Firmware Loading | |
455 | */ | |
456 | ||
915a824e DW |
457 | static int if_spi_prog_helper_firmware(struct if_spi_card *card, |
458 | const struct firmware *firmware) | |
d2b21f19 CM |
459 | { |
460 | int err = 0; | |
d2b21f19 CM |
461 | int bytes_remaining; |
462 | const u8 *fw; | |
463 | u8 temp[HELPER_FW_LOAD_CHUNK_SZ]; | |
d2b21f19 | 464 | |
d2b21f19 CM |
465 | err = spu_set_interrupt_mode(card, 1, 0); |
466 | if (err) | |
467 | goto out; | |
915a824e | 468 | |
d2b21f19 CM |
469 | bytes_remaining = firmware->size; |
470 | fw = firmware->data; | |
471 | ||
472 | /* Load helper firmware image */ | |
473 | while (bytes_remaining > 0) { | |
8973a6e7 RD |
474 | /* |
475 | * Scratch pad 1 should contain the number of bytes we | |
476 | * want to download to the firmware | |
477 | */ | |
d2b21f19 CM |
478 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, |
479 | HELPER_FW_LOAD_CHUNK_SZ); | |
480 | if (err) | |
915a824e | 481 | goto out; |
d2b21f19 CM |
482 | |
483 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
484 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
485 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
486 | if (err) | |
915a824e | 487 | goto out; |
d2b21f19 | 488 | |
8973a6e7 RD |
489 | /* |
490 | * Feed the data into the command read/write port reg | |
491 | * in chunks of 64 bytes | |
492 | */ | |
d2b21f19 CM |
493 | memset(temp, 0, sizeof(temp)); |
494 | memcpy(temp, fw, | |
495 | min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ)); | |
496 | mdelay(10); | |
497 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, | |
498 | temp, HELPER_FW_LOAD_CHUNK_SZ); | |
499 | if (err) | |
915a824e | 500 | goto out; |
d2b21f19 CM |
501 | |
502 | /* Interrupt the boot code */ | |
503 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
504 | if (err) | |
915a824e | 505 | goto out; |
d2b21f19 CM |
506 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, |
507 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
508 | if (err) | |
915a824e | 509 | goto out; |
d2b21f19 CM |
510 | bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ; |
511 | fw += HELPER_FW_LOAD_CHUNK_SZ; | |
512 | } | |
513 | ||
8973a6e7 RD |
514 | /* |
515 | * Once the helper / single stage firmware download is complete, | |
d2b21f19 | 516 | * write 0 to scratch pad 1 and interrupt the |
8973a6e7 RD |
517 | * bootloader. This completes the helper download. |
518 | */ | |
d2b21f19 CM |
519 | err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK); |
520 | if (err) | |
915a824e | 521 | goto out; |
d2b21f19 CM |
522 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); |
523 | if (err) | |
915a824e | 524 | goto out; |
d2b21f19 CM |
525 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, |
526 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
d2b21f19 CM |
527 | out: |
528 | if (err) | |
0e4e06ae | 529 | pr_err("failed to load helper firmware (err=%d)\n", err); |
4bc606af | 530 | |
d2b21f19 CM |
531 | return err; |
532 | } | |
533 | ||
8973a6e7 RD |
534 | /* |
535 | * Returns the length of the next packet the firmware expects us to send. | |
536 | * Sets crc_err if the previous transfer had a CRC error. | |
537 | */ | |
d2b21f19 CM |
538 | static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card, |
539 | int *crc_err) | |
540 | { | |
541 | u16 len; | |
542 | int err = 0; | |
543 | ||
8973a6e7 RD |
544 | /* |
545 | * wait until the host interrupt status register indicates | |
546 | * that we are ready to download | |
547 | */ | |
d2b21f19 CM |
548 | err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG, |
549 | IF_SPI_HIST_CMD_DOWNLOAD_RDY, | |
550 | IF_SPI_HIST_CMD_DOWNLOAD_RDY); | |
551 | if (err) { | |
0e4e06ae | 552 | pr_err("timed out waiting for host_int_status\n"); |
d2b21f19 CM |
553 | return err; |
554 | } | |
555 | ||
556 | /* Ask the device how many bytes of firmware it wants. */ | |
557 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
558 | if (err) | |
559 | return err; | |
560 | ||
561 | if (len > IF_SPI_CMD_BUF_SIZE) { | |
0e4e06ae JP |
562 | pr_err("firmware load device requested a larger transfer than we are prepared to handle (len = %d)\n", |
563 | len); | |
d2b21f19 CM |
564 | return -EIO; |
565 | } | |
566 | if (len & 0x1) { | |
567 | lbs_deb_spi("%s: crc error\n", __func__); | |
568 | len &= ~0x1; | |
569 | *crc_err = 1; | |
570 | } else | |
571 | *crc_err = 0; | |
572 | ||
573 | return len; | |
574 | } | |
575 | ||
915a824e DW |
576 | static int if_spi_prog_main_firmware(struct if_spi_card *card, |
577 | const struct firmware *firmware) | |
d2b21f19 | 578 | { |
f3a57fd1 | 579 | struct lbs_private *priv = card->priv; |
d2b21f19 CM |
580 | int len, prev_len; |
581 | int bytes, crc_err = 0, err = 0; | |
d2b21f19 | 582 | const u8 *fw; |
d2b21f19 CM |
583 | u16 num_crc_errs; |
584 | ||
d2b21f19 CM |
585 | err = spu_set_interrupt_mode(card, 1, 0); |
586 | if (err) | |
587 | goto out; | |
588 | ||
d2b21f19 CM |
589 | err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0); |
590 | if (err) { | |
f3a57fd1 JP |
591 | netdev_err(priv->dev, |
592 | "%s: timed out waiting for initial scratch reg = 0\n", | |
593 | __func__); | |
915a824e | 594 | goto out; |
d2b21f19 CM |
595 | } |
596 | ||
597 | num_crc_errs = 0; | |
598 | prev_len = 0; | |
599 | bytes = firmware->size; | |
600 | fw = firmware->data; | |
601 | while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) { | |
602 | if (len < 0) { | |
603 | err = len; | |
915a824e | 604 | goto out; |
d2b21f19 CM |
605 | } |
606 | if (bytes < 0) { | |
8973a6e7 RD |
607 | /* |
608 | * If there are no more bytes left, we would normally | |
609 | * expect to have terminated with len = 0 | |
610 | */ | |
f3a57fd1 JP |
611 | netdev_err(priv->dev, |
612 | "Firmware load wants more bytes than we have to offer.\n"); | |
d2b21f19 CM |
613 | break; |
614 | } | |
615 | if (crc_err) { | |
616 | /* Previous transfer failed. */ | |
617 | if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) { | |
0e4e06ae | 618 | pr_err("Too many CRC errors encountered in firmware load.\n"); |
d2b21f19 | 619 | err = -EIO; |
915a824e | 620 | goto out; |
d2b21f19 CM |
621 | } |
622 | } else { | |
623 | /* Previous transfer succeeded. Advance counters. */ | |
624 | bytes -= prev_len; | |
625 | fw += prev_len; | |
626 | } | |
627 | if (bytes < len) { | |
628 | memset(card->cmd_buffer, 0, len); | |
629 | memcpy(card->cmd_buffer, fw, bytes); | |
630 | } else | |
631 | memcpy(card->cmd_buffer, fw, len); | |
632 | ||
633 | err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0); | |
634 | if (err) | |
915a824e | 635 | goto out; |
d2b21f19 CM |
636 | err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, |
637 | card->cmd_buffer, len); | |
638 | if (err) | |
915a824e | 639 | goto out; |
d2b21f19 CM |
640 | err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG , |
641 | IF_SPI_CIC_CMD_DOWNLOAD_OVER); | |
642 | if (err) | |
915a824e | 643 | goto out; |
d2b21f19 CM |
644 | prev_len = len; |
645 | } | |
646 | if (bytes > prev_len) { | |
0e4e06ae | 647 | pr_err("firmware load wants fewer bytes than we have to offer\n"); |
d2b21f19 CM |
648 | } |
649 | ||
650 | /* Confirm firmware download */ | |
651 | err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG, | |
652 | SUCCESSFUL_FW_DOWNLOAD_MAGIC); | |
653 | if (err) { | |
0e4e06ae | 654 | pr_err("failed to confirm the firmware download\n"); |
915a824e | 655 | goto out; |
d2b21f19 CM |
656 | } |
657 | ||
d2b21f19 CM |
658 | out: |
659 | if (err) | |
0e4e06ae | 660 | pr_err("failed to load firmware (err=%d)\n", err); |
4bc606af | 661 | |
d2b21f19 CM |
662 | return err; |
663 | } | |
664 | ||
665 | /* | |
666 | * SPI Transfer Thread | |
667 | * | |
16f775be | 668 | * The SPI worker handles all SPI transfers, so there is no need for a lock. |
d2b21f19 CM |
669 | */ |
670 | ||
671 | /* Move a command from the card to the host */ | |
672 | static int if_spi_c2h_cmd(struct if_spi_card *card) | |
673 | { | |
674 | struct lbs_private *priv = card->priv; | |
675 | unsigned long flags; | |
676 | int err = 0; | |
677 | u16 len; | |
678 | u8 i; | |
679 | ||
8973a6e7 RD |
680 | /* |
681 | * We need a buffer big enough to handle whatever people send to | |
682 | * hw_host_to_card | |
683 | */ | |
d2b21f19 CM |
684 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE); |
685 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE); | |
686 | ||
8973a6e7 RD |
687 | /* |
688 | * It's just annoying if the buffer size isn't a multiple of 4, because | |
689 | * then we might have len < IF_SPI_CMD_BUF_SIZE but | |
690 | * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE | |
691 | */ | |
d2b21f19 CM |
692 | BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0); |
693 | ||
d2b21f19 CM |
694 | /* How many bytes are there to read? */ |
695 | err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len); | |
696 | if (err) | |
697 | goto out; | |
698 | if (!len) { | |
f3a57fd1 JP |
699 | netdev_err(priv->dev, "%s: error: card has no data for host\n", |
700 | __func__); | |
d2b21f19 CM |
701 | err = -EINVAL; |
702 | goto out; | |
703 | } else if (len > IF_SPI_CMD_BUF_SIZE) { | |
f3a57fd1 JP |
704 | netdev_err(priv->dev, |
705 | "%s: error: response packet too large: %d bytes, but maximum is %d\n", | |
706 | __func__, len, IF_SPI_CMD_BUF_SIZE); | |
d2b21f19 CM |
707 | err = -EINVAL; |
708 | goto out; | |
709 | } | |
710 | ||
711 | /* Read the data from the WLAN module into our command buffer */ | |
712 | err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG, | |
713 | card->cmd_buffer, ALIGN(len, 4)); | |
714 | if (err) | |
715 | goto out; | |
716 | ||
717 | spin_lock_irqsave(&priv->driver_lock, flags); | |
718 | i = (priv->resp_idx == 0) ? 1 : 0; | |
719 | BUG_ON(priv->resp_len[i]); | |
720 | priv->resp_len[i] = len; | |
721 | memcpy(priv->resp_buf[i], card->cmd_buffer, len); | |
722 | lbs_notify_command_response(priv, i); | |
723 | spin_unlock_irqrestore(&priv->driver_lock, flags); | |
724 | ||
725 | out: | |
726 | if (err) | |
f3a57fd1 | 727 | netdev_err(priv->dev, "%s: err=%d\n", __func__, err); |
4bc606af | 728 | |
d2b21f19 CM |
729 | return err; |
730 | } | |
731 | ||
732 | /* Move data from the card to the host */ | |
733 | static int if_spi_c2h_data(struct if_spi_card *card) | |
734 | { | |
f3a57fd1 | 735 | struct lbs_private *priv = card->priv; |
d2b21f19 CM |
736 | struct sk_buff *skb; |
737 | char *data; | |
738 | u16 len; | |
739 | int err = 0; | |
740 | ||
d2b21f19 CM |
741 | /* How many bytes are there to read? */ |
742 | err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len); | |
743 | if (err) | |
744 | goto out; | |
745 | if (!len) { | |
f3a57fd1 JP |
746 | netdev_err(priv->dev, "%s: error: card has no data for host\n", |
747 | __func__); | |
d2b21f19 CM |
748 | err = -EINVAL; |
749 | goto out; | |
750 | } else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
f3a57fd1 JP |
751 | netdev_err(priv->dev, |
752 | "%s: error: card has %d bytes of data, but our maximum skb size is %zu\n", | |
753 | __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
d2b21f19 CM |
754 | err = -EINVAL; |
755 | goto out; | |
756 | } | |
757 | ||
758 | /* TODO: should we allocate a smaller skb if we have less data? */ | |
759 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE); | |
760 | if (!skb) { | |
761 | err = -ENOBUFS; | |
762 | goto out; | |
763 | } | |
764 | skb_reserve(skb, IPFIELD_ALIGN_OFFSET); | |
765 | data = skb_put(skb, len); | |
766 | ||
767 | /* Read the data from the WLAN module into our skb... */ | |
768 | err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); | |
769 | if (err) | |
770 | goto free_skb; | |
771 | ||
772 | /* pass the SKB to libertas */ | |
773 | err = lbs_process_rxed_packet(card->priv, skb); | |
774 | if (err) | |
775 | goto free_skb; | |
776 | ||
777 | /* success */ | |
778 | goto out; | |
779 | ||
780 | free_skb: | |
781 | dev_kfree_skb(skb); | |
782 | out: | |
783 | if (err) | |
f3a57fd1 | 784 | netdev_err(priv->dev, "%s: err=%d\n", __func__, err); |
4bc606af | 785 | |
d2b21f19 CM |
786 | return err; |
787 | } | |
788 | ||
16f775be VK |
789 | /* Move data or a command from the host to the card. */ |
790 | static void if_spi_h2c(struct if_spi_card *card, | |
791 | struct if_spi_packet *packet, int type) | |
792 | { | |
f3a57fd1 | 793 | struct lbs_private *priv = card->priv; |
16f775be | 794 | int err = 0; |
937a1309 | 795 | u16 port_reg; |
16f775be VK |
796 | |
797 | switch (type) { | |
798 | case MVMS_DAT: | |
16f775be VK |
799 | port_reg = IF_SPI_DATA_RDWRPORT_REG; |
800 | break; | |
801 | case MVMS_CMD: | |
16f775be VK |
802 | port_reg = IF_SPI_CMD_RDWRPORT_REG; |
803 | break; | |
804 | default: | |
f3a57fd1 JP |
805 | netdev_err(priv->dev, "can't transfer buffer of type %d\n", |
806 | type); | |
16f775be VK |
807 | err = -EINVAL; |
808 | goto out; | |
809 | } | |
810 | ||
811 | /* Write the data to the card */ | |
812 | err = spu_write(card, port_reg, packet->buffer, packet->blen); | |
813 | if (err) | |
814 | goto out; | |
815 | ||
816 | out: | |
817 | kfree(packet); | |
818 | ||
819 | if (err) | |
f3a57fd1 | 820 | netdev_err(priv->dev, "%s: error %d\n", __func__, err); |
16f775be VK |
821 | } |
822 | ||
d2b21f19 CM |
823 | /* Inform the host about a card event */ |
824 | static void if_spi_e2h(struct if_spi_card *card) | |
825 | { | |
826 | int err = 0; | |
d2b21f19 CM |
827 | u32 cause; |
828 | struct lbs_private *priv = card->priv; | |
829 | ||
830 | err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause); | |
831 | if (err) | |
832 | goto out; | |
833 | ||
ea2d0639 | 834 | /* re-enable the card event interrupt */ |
835 | spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, | |
836 | ~IF_SPI_HICU_CARD_EVENT); | |
837 | ||
838 | /* generate a card interrupt */ | |
839 | spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT); | |
840 | ||
d2b21f19 | 841 | lbs_queue_event(priv, cause & 0xff); |
d2b21f19 CM |
842 | out: |
843 | if (err) | |
f3a57fd1 | 844 | netdev_err(priv->dev, "%s: error %d\n", __func__, err); |
d2b21f19 CM |
845 | } |
846 | ||
16f775be | 847 | static void if_spi_host_to_card_worker(struct work_struct *work) |
d2b21f19 CM |
848 | { |
849 | int err; | |
16f775be | 850 | struct if_spi_card *card; |
d2b21f19 | 851 | u16 hiStatus; |
16f775be VK |
852 | unsigned long flags; |
853 | struct if_spi_packet *packet; | |
f3a57fd1 | 854 | struct lbs_private *priv; |
d2b21f19 | 855 | |
16f775be | 856 | card = container_of(work, struct if_spi_card, packet_work); |
f3a57fd1 | 857 | priv = card->priv; |
d2b21f19 | 858 | |
8973a6e7 RD |
859 | /* |
860 | * Read the host interrupt status register to see what we | |
861 | * can do. | |
862 | */ | |
16f775be VK |
863 | err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG, |
864 | &hiStatus); | |
865 | if (err) { | |
f3a57fd1 | 866 | netdev_err(priv->dev, "I/O error\n"); |
16f775be VK |
867 | goto err; |
868 | } | |
869 | ||
870 | if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) { | |
871 | err = if_spi_c2h_cmd(card); | |
872 | if (err) | |
d2b21f19 | 873 | goto err; |
16f775be VK |
874 | } |
875 | if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) { | |
876 | err = if_spi_c2h_data(card); | |
877 | if (err) | |
878 | goto err; | |
879 | } | |
d2b21f19 | 880 | |
8973a6e7 RD |
881 | /* |
882 | * workaround: in PS mode, the card does not set the Command | |
883 | * Download Ready bit, but it sets TX Download Ready. | |
884 | */ | |
16f775be VK |
885 | if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY || |
886 | (card->priv->psstate != PS_STATE_FULL_POWER && | |
887 | (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) { | |
8973a6e7 RD |
888 | /* |
889 | * This means two things. First of all, | |
16f775be VK |
890 | * if there was a previous command sent, the card has |
891 | * successfully received it. | |
892 | * Secondly, it is now ready to download another | |
893 | * command. | |
894 | */ | |
895 | lbs_host_to_card_done(card->priv); | |
896 | ||
8973a6e7 | 897 | /* Do we have any command packets from the host to send? */ |
16f775be VK |
898 | packet = NULL; |
899 | spin_lock_irqsave(&card->buffer_lock, flags); | |
900 | if (!list_empty(&card->cmd_packet_list)) { | |
901 | packet = (struct if_spi_packet *)(card-> | |
902 | cmd_packet_list.next); | |
903 | list_del(&packet->list); | |
2674f82d | 904 | } |
16f775be | 905 | spin_unlock_irqrestore(&card->buffer_lock, flags); |
b3781c74 | 906 | |
16f775be VK |
907 | if (packet) |
908 | if_spi_h2c(card, packet, MVMS_CMD); | |
909 | } | |
910 | if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) { | |
8973a6e7 | 911 | /* Do we have any data packets from the host to send? */ |
16f775be VK |
912 | packet = NULL; |
913 | spin_lock_irqsave(&card->buffer_lock, flags); | |
914 | if (!list_empty(&card->data_packet_list)) { | |
915 | packet = (struct if_spi_packet *)(card-> | |
916 | data_packet_list.next); | |
917 | list_del(&packet->list); | |
d2b21f19 | 918 | } |
16f775be | 919 | spin_unlock_irqrestore(&card->buffer_lock, flags); |
d2b21f19 | 920 | |
16f775be VK |
921 | if (packet) |
922 | if_spi_h2c(card, packet, MVMS_DAT); | |
923 | } | |
924 | if (hiStatus & IF_SPI_HIST_CARD_EVENT) | |
925 | if_spi_e2h(card); | |
d2b21f19 CM |
926 | |
927 | err: | |
16f775be | 928 | if (err) |
f3a57fd1 | 929 | netdev_err(priv->dev, "%s: got error %d\n", __func__, err); |
d2b21f19 CM |
930 | } |
931 | ||
932 | /* | |
933 | * Host to Card | |
934 | * | |
935 | * Called from Libertas to transfer some data to the WLAN device | |
8973a6e7 RD |
936 | * We can't sleep here. |
937 | */ | |
d2b21f19 CM |
938 | static int if_spi_host_to_card(struct lbs_private *priv, |
939 | u8 type, u8 *buf, u16 nb) | |
940 | { | |
941 | int err = 0; | |
16f775be | 942 | unsigned long flags; |
d2b21f19 | 943 | struct if_spi_card *card = priv->card; |
16f775be VK |
944 | struct if_spi_packet *packet; |
945 | u16 blen; | |
d2b21f19 | 946 | |
16f775be | 947 | if (nb == 0) { |
f3a57fd1 JP |
948 | netdev_err(priv->dev, "%s: invalid size requested: %d\n", |
949 | __func__, nb); | |
16f775be VK |
950 | err = -EINVAL; |
951 | goto out; | |
952 | } | |
953 | blen = ALIGN(nb, 4); | |
954 | packet = kzalloc(sizeof(struct if_spi_packet) + blen, GFP_ATOMIC); | |
955 | if (!packet) { | |
956 | err = -ENOMEM; | |
957 | goto out; | |
958 | } | |
959 | packet->blen = blen; | |
960 | memcpy(packet->buffer, buf, nb); | |
961 | memset(packet->buffer + nb, 0, blen - nb); | |
d2b21f19 CM |
962 | |
963 | switch (type) { | |
964 | case MVMS_CMD: | |
16f775be VK |
965 | priv->dnld_sent = DNLD_CMD_SENT; |
966 | spin_lock_irqsave(&card->buffer_lock, flags); | |
967 | list_add_tail(&packet->list, &card->cmd_packet_list); | |
968 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
d2b21f19 CM |
969 | break; |
970 | case MVMS_DAT: | |
16f775be VK |
971 | priv->dnld_sent = DNLD_DATA_SENT; |
972 | spin_lock_irqsave(&card->buffer_lock, flags); | |
973 | list_add_tail(&packet->list, &card->data_packet_list); | |
974 | spin_unlock_irqrestore(&card->buffer_lock, flags); | |
d2b21f19 CM |
975 | break; |
976 | default: | |
fe09b32a | 977 | kfree(packet); |
f3a57fd1 JP |
978 | netdev_err(priv->dev, "can't transfer buffer of type %d\n", |
979 | type); | |
d2b21f19 CM |
980 | err = -EINVAL; |
981 | break; | |
982 | } | |
983 | ||
16f775be VK |
984 | /* Queue spi xfer work */ |
985 | queue_work(card->workqueue, &card->packet_work); | |
986 | out: | |
d2b21f19 CM |
987 | return err; |
988 | } | |
989 | ||
990 | /* | |
991 | * Host Interrupts | |
992 | * | |
993 | * Service incoming interrupts from the WLAN device. We can't sleep here, so | |
16f775be | 994 | * don't try to talk on the SPI bus, just queue the SPI xfer work. |
d2b21f19 CM |
995 | */ |
996 | static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id) | |
997 | { | |
998 | struct if_spi_card *card = dev_id; | |
999 | ||
16f775be VK |
1000 | queue_work(card->workqueue, &card->packet_work); |
1001 | ||
d2b21f19 CM |
1002 | return IRQ_HANDLED; |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * SPI callbacks | |
1007 | */ | |
1008 | ||
16f775be | 1009 | static int if_spi_init_card(struct if_spi_card *card) |
d2b21f19 | 1010 | { |
f3a57fd1 | 1011 | struct lbs_private *priv = card->priv; |
16f775be | 1012 | int err, i; |
d2b21f19 | 1013 | u32 scratch; |
915a824e DW |
1014 | const struct firmware *helper = NULL; |
1015 | const struct firmware *mainfw = NULL; | |
d2b21f19 | 1016 | |
16f775be | 1017 | err = spu_init(card, card->pdata->use_dummy_writes); |
d2b21f19 | 1018 | if (err) |
16f775be | 1019 | goto out; |
d2b21f19 CM |
1020 | err = spu_get_chip_revision(card, &card->card_id, &card->card_rev); |
1021 | if (err) | |
16f775be | 1022 | goto out; |
d2b21f19 | 1023 | |
d2b21f19 CM |
1024 | err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch); |
1025 | if (err) | |
16f775be | 1026 | goto out; |
d2b21f19 CM |
1027 | if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC) |
1028 | lbs_deb_spi("Firmware is already loaded for " | |
1029 | "Marvell WLAN 802.11 adapter\n"); | |
1030 | else { | |
915a824e DW |
1031 | /* Check if we support this card */ |
1032 | for (i = 0; i < ARRAY_SIZE(fw_table); i++) { | |
1033 | if (card->card_id == fw_table[i].model) | |
1034 | break; | |
1035 | } | |
1036 | if (i == ARRAY_SIZE(fw_table)) { | |
f3a57fd1 JP |
1037 | netdev_err(priv->dev, "Unsupported chip_id: 0x%02x\n", |
1038 | card->card_id); | |
915a824e | 1039 | err = -ENODEV; |
16f775be | 1040 | goto out; |
915a824e DW |
1041 | } |
1042 | ||
370803c2 DD |
1043 | err = lbs_get_firmware(&card->spi->dev, card->card_id, |
1044 | &fw_table[0], &helper, &mainfw); | |
915a824e | 1045 | if (err) { |
f3a57fd1 JP |
1046 | netdev_err(priv->dev, "failed to find firmware (%d)\n", |
1047 | err); | |
16f775be | 1048 | goto out; |
915a824e | 1049 | } |
d2b21f19 CM |
1050 | |
1051 | lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter " | |
1052 | "(chip_id = 0x%04x, chip_rev = 0x%02x) " | |
1053 | "attached to SPI bus_num %d, chip_select %d. " | |
1054 | "spi->max_speed_hz=%d\n", | |
1055 | card->card_id, card->card_rev, | |
545a8aa7 NK |
1056 | card->spi->master->bus_num, |
1057 | card->spi->chip_select, | |
1058 | card->spi->max_speed_hz); | |
915a824e | 1059 | err = if_spi_prog_helper_firmware(card, helper); |
d2b21f19 | 1060 | if (err) |
16f775be | 1061 | goto out; |
915a824e | 1062 | err = if_spi_prog_main_firmware(card, mainfw); |
d2b21f19 | 1063 | if (err) |
16f775be | 1064 | goto out; |
d2b21f19 CM |
1065 | lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n"); |
1066 | } | |
1067 | ||
1068 | err = spu_set_interrupt_mode(card, 0, 1); | |
16f775be VK |
1069 | if (err) |
1070 | goto out; | |
1071 | ||
1072 | out: | |
16f775be VK |
1073 | return err; |
1074 | } | |
1075 | ||
f39de992 VK |
1076 | static void if_spi_resume_worker(struct work_struct *work) |
1077 | { | |
1078 | struct if_spi_card *card; | |
1079 | ||
1080 | card = container_of(work, struct if_spi_card, resume_work); | |
1081 | ||
1082 | if (card->suspended) { | |
1083 | if (card->pdata->setup) | |
1084 | card->pdata->setup(card->spi); | |
1085 | ||
1086 | /* Init card ... */ | |
1087 | if_spi_init_card(card); | |
1088 | ||
1089 | enable_irq(card->spi->irq); | |
1090 | ||
1091 | /* And resume it ... */ | |
1092 | lbs_resume(card->priv); | |
1093 | ||
1094 | card->suspended = 0; | |
1095 | } | |
1096 | } | |
1097 | ||
fbdb7fce | 1098 | static int if_spi_probe(struct spi_device *spi) |
16f775be VK |
1099 | { |
1100 | struct if_spi_card *card; | |
1101 | struct lbs_private *priv = NULL; | |
7204c978 | 1102 | struct libertas_spi_platform_data *pdata = dev_get_platdata(&spi->dev); |
16f775be VK |
1103 | int err = 0; |
1104 | ||
16f775be VK |
1105 | if (!pdata) { |
1106 | err = -EINVAL; | |
1107 | goto out; | |
1108 | } | |
1109 | ||
1110 | if (pdata->setup) { | |
1111 | err = pdata->setup(spi); | |
1112 | if (err) | |
1113 | goto out; | |
1114 | } | |
1115 | ||
1116 | /* Allocate card structure to represent this specific device */ | |
1117 | card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL); | |
1118 | if (!card) { | |
1119 | err = -ENOMEM; | |
1120 | goto teardown; | |
1121 | } | |
1122 | spi_set_drvdata(spi, card); | |
1123 | card->pdata = pdata; | |
1124 | card->spi = spi; | |
1125 | card->prev_xfer_time = jiffies; | |
1126 | ||
1127 | INIT_LIST_HEAD(&card->cmd_packet_list); | |
1128 | INIT_LIST_HEAD(&card->data_packet_list); | |
1129 | spin_lock_init(&card->buffer_lock); | |
1130 | ||
1131 | /* Initialize the SPI Interface Unit */ | |
1132 | ||
1133 | /* Firmware load */ | |
1134 | err = if_spi_init_card(card); | |
d2b21f19 | 1135 | if (err) |
4d1d4985 | 1136 | goto free_card; |
d2b21f19 | 1137 | |
8973a6e7 RD |
1138 | /* |
1139 | * Register our card with libertas. | |
1140 | * This will call alloc_etherdev. | |
1141 | */ | |
d2b21f19 | 1142 | priv = lbs_add_card(card, &spi->dev); |
bbc2a101 LR |
1143 | if (IS_ERR(priv)) { |
1144 | err = PTR_ERR(priv); | |
4d1d4985 | 1145 | goto free_card; |
d2b21f19 CM |
1146 | } |
1147 | card->priv = priv; | |
f39de992 | 1148 | priv->setup_fw_on_resume = 1; |
d2b21f19 CM |
1149 | priv->card = card; |
1150 | priv->hw_host_to_card = if_spi_host_to_card; | |
49125454 AK |
1151 | priv->enter_deep_sleep = NULL; |
1152 | priv->exit_deep_sleep = NULL; | |
1153 | priv->reset_deep_sleep_wakeup = NULL; | |
d2b21f19 | 1154 | priv->fw_ready = 1; |
d2b21f19 CM |
1155 | |
1156 | /* Initialize interrupt handling stuff. */ | |
f9f905b0 | 1157 | card->workqueue = alloc_workqueue("libertas_spi", WQ_MEM_RECLAIM, 0); |
dc3f89c3 PB |
1158 | if (!card->workqueue) { |
1159 | err = -ENOMEM; | |
1160 | goto remove_card; | |
1161 | } | |
16f775be | 1162 | INIT_WORK(&card->packet_work, if_spi_host_to_card_worker); |
f39de992 | 1163 | INIT_WORK(&card->resume_work, if_spi_resume_worker); |
b26ed97c | 1164 | |
d2b21f19 CM |
1165 | err = request_irq(spi->irq, if_spi_host_interrupt, |
1166 | IRQF_TRIGGER_FALLING, "libertas_spi", card); | |
1167 | if (err) { | |
0e4e06ae | 1168 | pr_err("can't get host irq line-- request_irq failed\n"); |
16f775be | 1169 | goto terminate_workqueue; |
d2b21f19 CM |
1170 | } |
1171 | ||
8973a6e7 RD |
1172 | /* |
1173 | * Start the card. | |
d2b21f19 | 1174 | * This will call register_netdev, and we'll start |
8973a6e7 RD |
1175 | * getting interrupts... |
1176 | */ | |
d2b21f19 CM |
1177 | err = lbs_start_card(priv); |
1178 | if (err) | |
1179 | goto release_irq; | |
1180 | ||
1181 | lbs_deb_spi("Finished initializing WLAN module.\n"); | |
1182 | ||
1183 | /* successful exit */ | |
1184 | goto out; | |
1185 | ||
1186 | release_irq: | |
1187 | free_irq(spi->irq, card); | |
16f775be | 1188 | terminate_workqueue: |
16f775be | 1189 | destroy_workqueue(card->workqueue); |
dc3f89c3 | 1190 | remove_card: |
d2b21f19 | 1191 | lbs_remove_card(priv); /* will call free_netdev */ |
d2b21f19 CM |
1192 | free_card: |
1193 | free_if_spi_card(card); | |
16f775be VK |
1194 | teardown: |
1195 | if (pdata->teardown) | |
1196 | pdata->teardown(spi); | |
d2b21f19 | 1197 | out: |
d2b21f19 CM |
1198 | return err; |
1199 | } | |
1200 | ||
fbdb7fce | 1201 | static int libertas_spi_remove(struct spi_device *spi) |
d2b21f19 CM |
1202 | { |
1203 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1204 | struct lbs_private *priv = card->priv; | |
1205 | ||
1206 | lbs_deb_spi("libertas_spi_remove\n"); | |
d2b21f19 | 1207 | |
f39de992 VK |
1208 | cancel_work_sync(&card->resume_work); |
1209 | ||
d2b21f19 | 1210 | lbs_stop_card(priv); |
efcfd1f2 AY |
1211 | lbs_remove_card(priv); /* will call free_netdev */ |
1212 | ||
d2b21f19 | 1213 | free_irq(spi->irq, card); |
16f775be | 1214 | destroy_workqueue(card->workqueue); |
0c2bec96 MR |
1215 | if (card->pdata->teardown) |
1216 | card->pdata->teardown(spi); | |
d2b21f19 | 1217 | free_if_spi_card(card); |
4bc606af | 1218 | |
d2b21f19 CM |
1219 | return 0; |
1220 | } | |
1221 | ||
f39de992 VK |
1222 | static int if_spi_suspend(struct device *dev) |
1223 | { | |
1224 | struct spi_device *spi = to_spi_device(dev); | |
1225 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1226 | ||
1227 | if (!card->suspended) { | |
1228 | lbs_suspend(card->priv); | |
1229 | flush_workqueue(card->workqueue); | |
1230 | disable_irq(spi->irq); | |
1231 | ||
1232 | if (card->pdata->teardown) | |
1233 | card->pdata->teardown(spi); | |
1234 | card->suspended = 1; | |
1235 | } | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | static int if_spi_resume(struct device *dev) | |
1241 | { | |
1242 | struct spi_device *spi = to_spi_device(dev); | |
1243 | struct if_spi_card *card = spi_get_drvdata(spi); | |
1244 | ||
1245 | /* Schedule delayed work */ | |
1246 | schedule_work(&card->resume_work); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static const struct dev_pm_ops if_spi_pm_ops = { | |
1252 | .suspend = if_spi_suspend, | |
1253 | .resume = if_spi_resume, | |
1254 | }; | |
1255 | ||
d2b21f19 CM |
1256 | static struct spi_driver libertas_spi_driver = { |
1257 | .probe = if_spi_probe, | |
fbdb7fce | 1258 | .remove = libertas_spi_remove, |
d2b21f19 CM |
1259 | .driver = { |
1260 | .name = "libertas_spi", | |
f39de992 | 1261 | .pm = &if_spi_pm_ops, |
d2b21f19 CM |
1262 | }, |
1263 | }; | |
1264 | ||
1265 | /* | |
1266 | * Module functions | |
1267 | */ | |
1268 | ||
1269 | static int __init if_spi_init_module(void) | |
1270 | { | |
1271 | int ret = 0; | |
4bc606af | 1272 | |
d2b21f19 CM |
1273 | printk(KERN_INFO "libertas_spi: Libertas SPI driver\n"); |
1274 | ret = spi_register_driver(&libertas_spi_driver); | |
4bc606af | 1275 | |
d2b21f19 CM |
1276 | return ret; |
1277 | } | |
1278 | ||
1279 | static void __exit if_spi_exit_module(void) | |
1280 | { | |
d2b21f19 | 1281 | spi_unregister_driver(&libertas_spi_driver); |
d2b21f19 CM |
1282 | } |
1283 | ||
1284 | module_init(if_spi_init_module); | |
1285 | module_exit(if_spi_exit_module); | |
1286 | ||
1287 | MODULE_DESCRIPTION("Libertas SPI WLAN Driver"); | |
1288 | MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, " | |
1289 | "Colin McCabe <colin@cozybit.com>"); | |
1290 | MODULE_LICENSE("GPL"); | |
e0626e38 | 1291 | MODULE_ALIAS("spi:libertas_spi"); |