Commit | Line | Data |
---|---|---|
f5fc0f86 LC |
1 | /* |
2 | * This file is part of wl1271 | |
3 | * | |
4 | * Copyright (C) 2008-2009 Nokia Corporation | |
5 | * | |
6 | * Contact: Luciano Coelho <luciano.coelho@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | * | |
22 | */ | |
23 | ||
2d5e82b8 | 24 | #include <linux/irq.h> |
f5fc0f86 | 25 | #include <linux/module.h> |
f5fc0f86 LC |
26 | #include <linux/crc7.h> |
27 | #include <linux/spi/spi.h> | |
c1f9a095 | 28 | #include <linux/wl12xx.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
f5fc0f86 | 30 | |
00d20100 | 31 | #include "wl12xx.h" |
f5fc0f86 | 32 | #include "wl12xx_80211.h" |
00d20100 | 33 | #include "io.h" |
f5fc0f86 | 34 | |
00d20100 | 35 | #include "reg.h" |
760d969f TP |
36 | |
37 | #define WSPI_CMD_READ 0x40000000 | |
38 | #define WSPI_CMD_WRITE 0x00000000 | |
39 | #define WSPI_CMD_FIXED 0x20000000 | |
40 | #define WSPI_CMD_BYTE_LENGTH 0x1FFE0000 | |
41 | #define WSPI_CMD_BYTE_LENGTH_OFFSET 17 | |
42 | #define WSPI_CMD_BYTE_ADDR 0x0001FFFF | |
43 | ||
44 | #define WSPI_INIT_CMD_CRC_LEN 5 | |
45 | ||
46 | #define WSPI_INIT_CMD_START 0x00 | |
47 | #define WSPI_INIT_CMD_TX 0x40 | |
48 | /* the extra bypass bit is sampled by the TNET as '1' */ | |
49 | #define WSPI_INIT_CMD_BYPASS_BIT 0x80 | |
50 | #define WSPI_INIT_CMD_FIXEDBUSY_LEN 0x07 | |
51 | #define WSPI_INIT_CMD_EN_FIXEDBUSY 0x80 | |
52 | #define WSPI_INIT_CMD_DIS_FIXEDBUSY 0x00 | |
53 | #define WSPI_INIT_CMD_IOD 0x40 | |
54 | #define WSPI_INIT_CMD_IP 0x20 | |
55 | #define WSPI_INIT_CMD_CS 0x10 | |
56 | #define WSPI_INIT_CMD_WS 0x08 | |
57 | #define WSPI_INIT_CMD_WSPI 0x01 | |
58 | #define WSPI_INIT_CMD_END 0x01 | |
59 | ||
60 | #define WSPI_INIT_CMD_LEN 8 | |
61 | ||
62 | #define HW_ACCESS_WSPI_FIXED_BUSY_LEN \ | |
63 | ((WL1271_BUSY_WORD_LEN - 4) / sizeof(u32)) | |
64 | #define HW_ACCESS_WSPI_INIT_CMD_MASK 0 | |
65 | ||
5c57a901 IY |
66 | /* HW limitation: maximum possible chunk size is 4095 bytes */ |
67 | #define WSPI_MAX_CHUNK_SIZE 4092 | |
68 | ||
69 | #define WSPI_MAX_NUM_OF_CHUNKS (WL1271_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE) | |
70 | ||
b42f91ba | 71 | static inline struct spi_device *wl_to_spi(struct wl1271 *wl) |
8197b711 TP |
72 | { |
73 | return wl->if_priv; | |
74 | } | |
75 | ||
76 | static struct device *wl1271_spi_wl_to_dev(struct wl1271 *wl) | |
77 | { | |
78 | return &(wl_to_spi(wl)->dev); | |
79 | } | |
f5fc0f86 | 80 | |
760d969f | 81 | static void wl1271_spi_disable_interrupts(struct wl1271 *wl) |
54f7e503 TP |
82 | { |
83 | disable_irq(wl->irq); | |
84 | } | |
85 | ||
760d969f | 86 | static void wl1271_spi_enable_interrupts(struct wl1271 *wl) |
54f7e503 TP |
87 | { |
88 | enable_irq(wl->irq); | |
89 | } | |
90 | ||
760d969f | 91 | static void wl1271_spi_reset(struct wl1271 *wl) |
f5fc0f86 LC |
92 | { |
93 | u8 *cmd; | |
94 | struct spi_transfer t; | |
95 | struct spi_message m; | |
96 | ||
97 | cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); | |
98 | if (!cmd) { | |
99 | wl1271_error("could not allocate cmd for spi reset"); | |
100 | return; | |
101 | } | |
102 | ||
103 | memset(&t, 0, sizeof(t)); | |
104 | spi_message_init(&m); | |
105 | ||
106 | memset(cmd, 0xff, WSPI_INIT_CMD_LEN); | |
107 | ||
108 | t.tx_buf = cmd; | |
109 | t.len = WSPI_INIT_CMD_LEN; | |
110 | spi_message_add_tail(&t, &m); | |
111 | ||
8197b711 | 112 | spi_sync(wl_to_spi(wl), &m); |
f5fc0f86 LC |
113 | |
114 | wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN); | |
0dd38667 | 115 | kfree(cmd); |
f5fc0f86 LC |
116 | } |
117 | ||
760d969f | 118 | static void wl1271_spi_init(struct wl1271 *wl) |
f5fc0f86 LC |
119 | { |
120 | u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd; | |
121 | struct spi_transfer t; | |
122 | struct spi_message m; | |
123 | ||
124 | cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); | |
125 | if (!cmd) { | |
126 | wl1271_error("could not allocate cmd for spi init"); | |
127 | return; | |
128 | } | |
129 | ||
130 | memset(crc, 0, sizeof(crc)); | |
131 | memset(&t, 0, sizeof(t)); | |
132 | spi_message_init(&m); | |
133 | ||
134 | /* | |
135 | * Set WSPI_INIT_COMMAND | |
136 | * the data is being send from the MSB to LSB | |
137 | */ | |
138 | cmd[2] = 0xff; | |
139 | cmd[3] = 0xff; | |
140 | cmd[1] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX; | |
141 | cmd[0] = 0; | |
142 | cmd[7] = 0; | |
143 | cmd[6] |= HW_ACCESS_WSPI_INIT_CMD_MASK << 3; | |
144 | cmd[6] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN; | |
145 | ||
146 | if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0) | |
147 | cmd[5] |= WSPI_INIT_CMD_DIS_FIXEDBUSY; | |
148 | else | |
149 | cmd[5] |= WSPI_INIT_CMD_EN_FIXEDBUSY; | |
150 | ||
151 | cmd[5] |= WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS | |
152 | | WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS; | |
153 | ||
154 | crc[0] = cmd[1]; | |
155 | crc[1] = cmd[0]; | |
156 | crc[2] = cmd[7]; | |
157 | crc[3] = cmd[6]; | |
158 | crc[4] = cmd[5]; | |
159 | ||
160 | cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1; | |
161 | cmd[4] |= WSPI_INIT_CMD_END; | |
162 | ||
163 | t.tx_buf = cmd; | |
164 | t.len = WSPI_INIT_CMD_LEN; | |
165 | spi_message_add_tail(&t, &m); | |
166 | ||
8197b711 | 167 | spi_sync(wl_to_spi(wl), &m); |
f5fc0f86 | 168 | wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN); |
bb123611 | 169 | kfree(cmd); |
f5fc0f86 LC |
170 | } |
171 | ||
545f1da8 JO |
172 | #define WL1271_BUSY_WORD_TIMEOUT 1000 |
173 | ||
259da430 | 174 | static int wl1271_spi_read_busy(struct wl1271 *wl) |
545f1da8 JO |
175 | { |
176 | struct spi_transfer t[1]; | |
177 | struct spi_message m; | |
178 | u32 *busy_buf; | |
179 | int num_busy_bytes = 0; | |
180 | ||
545f1da8 JO |
181 | /* |
182 | * Read further busy words from SPI until a non-busy word is | |
183 | * encountered, then read the data itself into the buffer. | |
184 | */ | |
545f1da8 JO |
185 | |
186 | num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT; | |
187 | busy_buf = wl->buffer_busyword; | |
188 | while (num_busy_bytes) { | |
189 | num_busy_bytes--; | |
190 | spi_message_init(&m); | |
191 | memset(t, 0, sizeof(t)); | |
192 | t[0].rx_buf = busy_buf; | |
193 | t[0].len = sizeof(u32); | |
259da430 | 194 | t[0].cs_change = true; |
545f1da8 | 195 | spi_message_add_tail(&t[0], &m); |
8197b711 | 196 | spi_sync(wl_to_spi(wl), &m); |
545f1da8 | 197 | |
259da430 JO |
198 | if (*busy_buf & 0x1) |
199 | return 0; | |
545f1da8 JO |
200 | } |
201 | ||
202 | /* The SPI bus is unresponsive, the read failed. */ | |
545f1da8 | 203 | wl1271_error("SPI read busy-word timeout!\n"); |
259da430 | 204 | return -ETIMEDOUT; |
545f1da8 JO |
205 | } |
206 | ||
760d969f | 207 | static void wl1271_spi_raw_read(struct wl1271 *wl, int addr, void *buf, |
259da430 | 208 | size_t len, bool fixed) |
f5fc0f86 | 209 | { |
5c57a901 | 210 | struct spi_transfer t[2]; |
f5fc0f86 | 211 | struct spi_message m; |
545f1da8 | 212 | u32 *busy_buf; |
f5fc0f86 | 213 | u32 *cmd; |
5c57a901 | 214 | u32 chunk_len; |
f5fc0f86 | 215 | |
5c57a901 IY |
216 | while (len > 0) { |
217 | chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len); | |
f5fc0f86 | 218 | |
5c57a901 IY |
219 | cmd = &wl->buffer_cmd; |
220 | busy_buf = wl->buffer_busyword; | |
f5fc0f86 | 221 | |
5c57a901 IY |
222 | *cmd = 0; |
223 | *cmd |= WSPI_CMD_READ; | |
224 | *cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) & | |
225 | WSPI_CMD_BYTE_LENGTH; | |
226 | *cmd |= addr & WSPI_CMD_BYTE_ADDR; | |
f5fc0f86 | 227 | |
5c57a901 IY |
228 | if (fixed) |
229 | *cmd |= WSPI_CMD_FIXED; | |
f5fc0f86 | 230 | |
5c57a901 IY |
231 | spi_message_init(&m); |
232 | memset(t, 0, sizeof(t)); | |
f5fc0f86 | 233 | |
5c57a901 IY |
234 | t[0].tx_buf = cmd; |
235 | t[0].len = 4; | |
236 | t[0].cs_change = true; | |
237 | spi_message_add_tail(&t[0], &m); | |
f5fc0f86 | 238 | |
5c57a901 IY |
239 | /* Busy and non busy words read */ |
240 | t[1].rx_buf = busy_buf; | |
241 | t[1].len = WL1271_BUSY_WORD_LEN; | |
242 | t[1].cs_change = true; | |
243 | spi_message_add_tail(&t[1], &m); | |
f5fc0f86 | 244 | |
5c57a901 | 245 | spi_sync(wl_to_spi(wl), &m); |
259da430 | 246 | |
5c57a901 IY |
247 | if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) && |
248 | wl1271_spi_read_busy(wl)) { | |
249 | memset(buf, 0, chunk_len); | |
250 | return; | |
251 | } | |
259da430 | 252 | |
5c57a901 IY |
253 | spi_message_init(&m); |
254 | memset(t, 0, sizeof(t)); | |
259da430 | 255 | |
5c57a901 IY |
256 | t[0].rx_buf = buf; |
257 | t[0].len = chunk_len; | |
258 | t[0].cs_change = true; | |
259 | spi_message_add_tail(&t[0], &m); | |
260 | ||
261 | spi_sync(wl_to_spi(wl), &m); | |
f5fc0f86 | 262 | |
5c57a901 IY |
263 | wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd)); |
264 | wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, chunk_len); | |
265 | ||
266 | if (!fixed) | |
267 | addr += chunk_len; | |
268 | buf += chunk_len; | |
269 | len -= chunk_len; | |
270 | } | |
f5fc0f86 LC |
271 | } |
272 | ||
760d969f | 273 | static void wl1271_spi_raw_write(struct wl1271 *wl, int addr, void *buf, |
74621417 | 274 | size_t len, bool fixed) |
f5fc0f86 | 275 | { |
5c57a901 | 276 | struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS]; |
f5fc0f86 | 277 | struct spi_message m; |
5c57a901 | 278 | u32 commands[WSPI_MAX_NUM_OF_CHUNKS]; |
f5fc0f86 | 279 | u32 *cmd; |
5c57a901 IY |
280 | u32 chunk_len; |
281 | int i; | |
f5fc0f86 | 282 | |
5c57a901 | 283 | WARN_ON(len > WL1271_AGGR_BUFFER_SIZE); |
f5fc0f86 LC |
284 | |
285 | spi_message_init(&m); | |
286 | memset(t, 0, sizeof(t)); | |
287 | ||
5c57a901 IY |
288 | cmd = &commands[0]; |
289 | i = 0; | |
290 | while (len > 0) { | |
291 | chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len); | |
f5fc0f86 | 292 | |
5c57a901 IY |
293 | *cmd = 0; |
294 | *cmd |= WSPI_CMD_WRITE; | |
295 | *cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) & | |
296 | WSPI_CMD_BYTE_LENGTH; | |
297 | *cmd |= addr & WSPI_CMD_BYTE_ADDR; | |
f5fc0f86 | 298 | |
5c57a901 IY |
299 | if (fixed) |
300 | *cmd |= WSPI_CMD_FIXED; | |
301 | ||
302 | t[i].tx_buf = cmd; | |
303 | t[i].len = sizeof(*cmd); | |
304 | spi_message_add_tail(&t[i++], &m); | |
305 | ||
306 | t[i].tx_buf = buf; | |
307 | t[i].len = chunk_len; | |
308 | spi_message_add_tail(&t[i++], &m); | |
f5fc0f86 | 309 | |
5c57a901 IY |
310 | wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd)); |
311 | wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, chunk_len); | |
312 | ||
313 | if (!fixed) | |
314 | addr += chunk_len; | |
315 | buf += chunk_len; | |
316 | len -= chunk_len; | |
317 | cmd++; | |
318 | } | |
319 | ||
320 | spi_sync(wl_to_spi(wl), &m); | |
f5fc0f86 | 321 | } |
2d5e82b8 | 322 | |
a620865e | 323 | static irqreturn_t wl1271_hardirq(int irq, void *cookie) |
2d5e82b8 | 324 | { |
a620865e | 325 | struct wl1271 *wl = cookie; |
2d5e82b8 TP |
326 | unsigned long flags; |
327 | ||
328 | wl1271_debug(DEBUG_IRQ, "IRQ"); | |
329 | ||
2d5e82b8 TP |
330 | /* complete the ELP completion */ |
331 | spin_lock_irqsave(&wl->wl_lock, flags); | |
a620865e | 332 | set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags); |
2d5e82b8 TP |
333 | if (wl->elp_compl) { |
334 | complete(wl->elp_compl); | |
335 | wl->elp_compl = NULL; | |
336 | } | |
2d5e82b8 TP |
337 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
338 | ||
a620865e | 339 | return IRQ_WAKE_THREAD; |
2d5e82b8 TP |
340 | } |
341 | ||
2cc78ff7 | 342 | static int wl1271_spi_set_power(struct wl1271 *wl, bool enable) |
becd551c TP |
343 | { |
344 | if (wl->set_power) | |
345 | wl->set_power(enable); | |
2cc78ff7 OBC |
346 | |
347 | return 0; | |
becd551c TP |
348 | } |
349 | ||
8197b711 TP |
350 | static struct wl1271_if_operations spi_ops = { |
351 | .read = wl1271_spi_raw_read, | |
352 | .write = wl1271_spi_raw_write, | |
353 | .reset = wl1271_spi_reset, | |
354 | .init = wl1271_spi_init, | |
becd551c | 355 | .power = wl1271_spi_set_power, |
8197b711 TP |
356 | .dev = wl1271_spi_wl_to_dev, |
357 | .enable_irq = wl1271_spi_enable_interrupts, | |
358 | .disable_irq = wl1271_spi_disable_interrupts | |
359 | }; | |
360 | ||
2d5e82b8 TP |
361 | static int __devinit wl1271_probe(struct spi_device *spi) |
362 | { | |
363 | struct wl12xx_platform_data *pdata; | |
364 | struct ieee80211_hw *hw; | |
365 | struct wl1271 *wl; | |
366 | int ret; | |
367 | ||
368 | pdata = spi->dev.platform_data; | |
369 | if (!pdata) { | |
370 | wl1271_error("no platform data"); | |
371 | return -ENODEV; | |
372 | } | |
373 | ||
374 | hw = wl1271_alloc_hw(); | |
375 | if (IS_ERR(hw)) | |
376 | return PTR_ERR(hw); | |
377 | ||
378 | wl = hw->priv; | |
379 | ||
380 | dev_set_drvdata(&spi->dev, wl); | |
8197b711 TP |
381 | wl->if_priv = spi; |
382 | ||
383 | wl->if_ops = &spi_ops; | |
2d5e82b8 TP |
384 | |
385 | /* This is the only SPI value that we need to set here, the rest | |
386 | * comes from the board-peripherals file */ | |
387 | spi->bits_per_word = 32; | |
388 | ||
389 | ret = spi_setup(spi); | |
390 | if (ret < 0) { | |
391 | wl1271_error("spi_setup failed"); | |
392 | goto out_free; | |
393 | } | |
394 | ||
395 | wl->set_power = pdata->set_power; | |
396 | if (!wl->set_power) { | |
397 | wl1271_error("set power function missing in platform data"); | |
398 | ret = -ENODEV; | |
399 | goto out_free; | |
400 | } | |
401 | ||
15cea993 OBC |
402 | wl->ref_clock = pdata->board_ref_clock; |
403 | ||
2d5e82b8 TP |
404 | wl->irq = spi->irq; |
405 | if (wl->irq < 0) { | |
406 | wl1271_error("irq missing in platform data"); | |
407 | ret = -ENODEV; | |
408 | goto out_free; | |
409 | } | |
410 | ||
a620865e | 411 | ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq, |
2da69b89 | 412 | IRQF_TRIGGER_HIGH | IRQF_ONESHOT, |
a620865e | 413 | DRIVER_NAME, wl); |
2d5e82b8 TP |
414 | if (ret < 0) { |
415 | wl1271_error("request_irq() failed: %d", ret); | |
416 | goto out_free; | |
417 | } | |
418 | ||
2d5e82b8 TP |
419 | disable_irq(wl->irq); |
420 | ||
2d5e82b8 TP |
421 | ret = wl1271_init_ieee80211(wl); |
422 | if (ret) | |
a1dd8187 | 423 | goto out_irq; |
2d5e82b8 TP |
424 | |
425 | ret = wl1271_register_hw(wl); | |
426 | if (ret) | |
a1dd8187 | 427 | goto out_irq; |
2d5e82b8 TP |
428 | |
429 | wl1271_notice("initialized"); | |
430 | ||
431 | return 0; | |
432 | ||
2d5e82b8 TP |
433 | out_irq: |
434 | free_irq(wl->irq, wl); | |
435 | ||
436 | out_free: | |
3b56dd6a | 437 | wl1271_free_hw(wl); |
2d5e82b8 TP |
438 | |
439 | return ret; | |
440 | } | |
441 | ||
442 | static int __devexit wl1271_remove(struct spi_device *spi) | |
443 | { | |
444 | struct wl1271 *wl = dev_get_drvdata(&spi->dev); | |
445 | ||
3b56dd6a | 446 | wl1271_unregister_hw(wl); |
4e23b11b | 447 | free_irq(wl->irq, wl); |
2d5e82b8 TP |
448 | wl1271_free_hw(wl); |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | ||
454 | static struct spi_driver wl1271_spi_driver = { | |
455 | .driver = { | |
7fdd50d0 | 456 | .name = "wl1271_spi", |
2d5e82b8 TP |
457 | .bus = &spi_bus_type, |
458 | .owner = THIS_MODULE, | |
459 | }, | |
460 | ||
461 | .probe = wl1271_probe, | |
462 | .remove = __devexit_p(wl1271_remove), | |
463 | }; | |
464 | ||
465 | static int __init wl1271_init(void) | |
466 | { | |
467 | int ret; | |
468 | ||
469 | ret = spi_register_driver(&wl1271_spi_driver); | |
470 | if (ret < 0) { | |
471 | wl1271_error("failed to register spi driver: %d", ret); | |
472 | goto out; | |
473 | } | |
474 | ||
475 | out: | |
476 | return ret; | |
477 | } | |
478 | ||
479 | static void __exit wl1271_exit(void) | |
480 | { | |
481 | spi_unregister_driver(&wl1271_spi_driver); | |
482 | ||
483 | wl1271_notice("unloaded"); | |
484 | } | |
485 | ||
486 | module_init(wl1271_init); | |
487 | module_exit(wl1271_exit); | |
488 | ||
489 | MODULE_LICENSE("GPL"); | |
5245e3a9 | 490 | MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>"); |
2d5e82b8 TP |
491 | MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>"); |
492 | MODULE_FIRMWARE(WL1271_FW_NAME); | |
5aa42346 | 493 | MODULE_FIRMWARE(WL128X_FW_NAME); |
d75387ca | 494 | MODULE_FIRMWARE(WL1271_AP_FW_NAME); |
f148cfdd | 495 | MODULE_ALIAS("spi:wl1271"); |