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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / mfd / wm8400-core.c
blob1bfef4846b07b0d98138c87509872937b2c29e6f
1 /*
2 * Core driver for WM8400.
3 *
4 * Copyright 2008 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.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 as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
12 *
13 */
14
15 #include <linux/bug.h>
16 #include <linux/i2c.h>
17 #include <linux/kernel.h>
18 #include <linux/mfd/core.h>
19 #include <linux/mfd/wm8400-private.h>
20 #include <linux/mfd/wm8400-audio.h>
21 #include <linux/slab.h>
22
23 static struct {
24 u16 readable; /* Mask of readable bits */
25 u16 writable; /* Mask of writable bits */
26 u16 vol; /* Mask of volatile bits */
27 int is_codec; /* Register controlled by codec reset */
28 u16 default_val; /* Value on reset */
29 } reg_data[] = {
30 { 0xFFFF, 0xFFFF, 0x0000, 0, 0x6172 }, /* R0 */
31 { 0x7000, 0x0000, 0x8000, 0, 0x0000 }, /* R1 */
32 { 0xFF17, 0xFF17, 0x0000, 0, 0x0000 }, /* R2 */
33 { 0xEBF3, 0xEBF3, 0x0000, 1, 0x6000 }, /* R3 */
34 { 0x3CF3, 0x3CF3, 0x0000, 1, 0x0000 }, /* R4 */
35 { 0xF1F8, 0xF1F8, 0x0000, 1, 0x4050 }, /* R5 */
36 { 0xFC1F, 0xFC1F, 0x0000, 1, 0x4000 }, /* R6 */
37 { 0xDFDE, 0xDFDE, 0x0000, 1, 0x01C8 }, /* R7 */
38 { 0xFCFC, 0xFCFC, 0x0000, 1, 0x0000 }, /* R8 */
39 { 0xEFFF, 0xEFFF, 0x0000, 1, 0x0040 }, /* R9 */
40 { 0xEFFF, 0xEFFF, 0x0000, 1, 0x0040 }, /* R10 */
41 { 0x27F7, 0x27F7, 0x0000, 1, 0x0004 }, /* R11 */
42 { 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R12 */
43 { 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R13 */
44 { 0x1FEF, 0x1FEF, 0x0000, 1, 0x0000 }, /* R14 */
45 { 0x0163, 0x0163, 0x0000, 1, 0x0100 }, /* R15 */
46 { 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R16 */
47 { 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R17 */
48 { 0x1FFF, 0x0FFF, 0x0000, 1, 0x0000 }, /* R18 */
49 { 0xFFFF, 0xFFFF, 0x0000, 1, 0x1000 }, /* R19 */
50 { 0xFFFF, 0xFFFF, 0x0000, 1, 0x1010 }, /* R20 */
51 { 0xFFFF, 0xFFFF, 0x0000, 1, 0x1010 }, /* R21 */
52 { 0x0FDD, 0x0FDD, 0x0000, 1, 0x8000 }, /* R22 */
53 { 0x1FFF, 0x1FFF, 0x0000, 1, 0x0800 }, /* R23 */
54 { 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R24 */
55 { 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R25 */
56 { 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R26 */
57 { 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R27 */
58 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R28 */
59 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R29 */
60 { 0x0000, 0x0077, 0x0000, 1, 0x0066 }, /* R30 */
61 { 0x0000, 0x0033, 0x0000, 1, 0x0022 }, /* R31 */
62 { 0x0000, 0x01FF, 0x0000, 1, 0x0079 }, /* R32 */
63 { 0x0000, 0x01FF, 0x0000, 1, 0x0079 }, /* R33 */
64 { 0x0000, 0x0003, 0x0000, 1, 0x0003 }, /* R34 */
65 { 0x0000, 0x01FF, 0x0000, 1, 0x0003 }, /* R35 */
66 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R36 */
67 { 0x0000, 0x003F, 0x0000, 1, 0x0100 }, /* R37 */
68 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R38 */
69 { 0x0000, 0x000F, 0x0000, 0, 0x0000 }, /* R39 */
70 { 0x0000, 0x00FF, 0x0000, 1, 0x0000 }, /* R40 */
71 { 0x0000, 0x01B7, 0x0000, 1, 0x0000 }, /* R41 */
72 { 0x0000, 0x01B7, 0x0000, 1, 0x0000 }, /* R42 */
73 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R43 */
74 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R44 */
75 { 0x0000, 0x00FD, 0x0000, 1, 0x0000 }, /* R45 */
76 { 0x0000, 0x00FD, 0x0000, 1, 0x0000 }, /* R46 */
77 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R47 */
78 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R48 */
79 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R49 */
80 { 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R50 */
81 { 0x0000, 0x01B3, 0x0000, 1, 0x0180 }, /* R51 */
82 { 0x0000, 0x0077, 0x0000, 1, 0x0000 }, /* R52 */
83 { 0x0000, 0x0077, 0x0000, 1, 0x0000 }, /* R53 */
84 { 0x0000, 0x00FF, 0x0000, 1, 0x0000 }, /* R54 */
85 { 0x0000, 0x0001, 0x0000, 1, 0x0000 }, /* R55 */
86 { 0x0000, 0x003F, 0x0000, 1, 0x0000 }, /* R56 */
87 { 0x0000, 0x004F, 0x0000, 1, 0x0000 }, /* R57 */
88 { 0x0000, 0x00FD, 0x0000, 1, 0x0000 }, /* R58 */
89 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R59 */
90 { 0x1FFF, 0x1FFF, 0x0000, 1, 0x0000 }, /* R60 */
91 { 0xFFFF, 0xFFFF, 0x0000, 1, 0x0000 }, /* R61 */
92 { 0x03FF, 0x03FF, 0x0000, 1, 0x0000 }, /* R62 */
93 { 0x007F, 0x007F, 0x0000, 1, 0x0000 }, /* R63 */
94 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R64 */
95 { 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R65 */
96 { 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R66 */
97 { 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R67 */
98 { 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R68 */
99 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R69 */
100 { 0xFFFF, 0xFFFF, 0x0000, 0, 0x4400 }, /* R70 */
101 { 0x23FF, 0x23FF, 0x0000, 0, 0x0000 }, /* R71 */
102 { 0xFFFF, 0xFFFF, 0x0000, 0, 0x4400 }, /* R72 */
103 { 0x23FF, 0x23FF, 0x0000, 0, 0x0000 }, /* R73 */
104 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R74 */
105 { 0x000E, 0x000E, 0x0000, 0, 0x0008 }, /* R75 */
106 { 0xE00F, 0xE00F, 0x0000, 0, 0x0000 }, /* R76 */
107 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R77 */
108 { 0x03C0, 0x03C0, 0x0000, 0, 0x02C0 }, /* R78 */
109 { 0xFFFF, 0x0000, 0xffff, 0, 0x0000 }, /* R79 */
110 { 0xFFFF, 0xFFFF, 0x0000, 0, 0x0000 }, /* R80 */
111 { 0xFFFF, 0x0000, 0xffff, 0, 0x0000 }, /* R81 */
112 { 0x2BFF, 0x0000, 0xffff, 0, 0x0000 }, /* R82 */
113 { 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R83 */
114 { 0x80FF, 0x80FF, 0x0000, 0, 0x00ff }, /* R84 */
115 };
116
117 static int wm8400_read(struct wm8400 *wm8400, u8 reg, int num_regs, u16 *dest)
118 {
119 int i, ret = 0;
120
121 BUG_ON(reg + num_regs > ARRAY_SIZE(wm8400->reg_cache));
122
123 /* If there are any volatile reads then read back the entire block */
124 for (i = reg; i < reg + num_regs; i++)
125 if (reg_data[i].vol) {
126 ret = wm8400->read_dev(wm8400->io_data, reg,
127 num_regs, dest);
128 if (ret != 0)
129 return ret;
130 for (i = 0; i < num_regs; i++)
131 dest[i] = be16_to_cpu(dest[i]);
132
133 return 0;
134 }
135
136 /* Otherwise use the cache */
137 memcpy(dest, &wm8400->reg_cache[reg], num_regs * sizeof(u16));
138
139 return 0;
140 }
141
142 static int wm8400_write(struct wm8400 *wm8400, u8 reg, int num_regs,
143 u16 *src)
144 {
145 int ret, i;
146
147 BUG_ON(reg + num_regs > ARRAY_SIZE(wm8400->reg_cache));
148
149 for (i = 0; i < num_regs; i++) {
150 BUG_ON(!reg_data[reg + i].writable);
151 wm8400->reg_cache[reg + i] = src[i];
152 src[i] = cpu_to_be16(src[i]);
153 }
154
155 /* Do the actual I/O */
156 ret = wm8400->write_dev(wm8400->io_data, reg, num_regs, src);
157 if (ret != 0)
158 return -EIO;
159
160 return 0;
161 }
162
163 /**
164 * wm8400_reg_read - Single register read
165 *
166 * @wm8400: Pointer to wm8400 control structure
167 * @reg: Register to read
168 *
169 * @return Read value
170 */
171 u16 wm8400_reg_read(struct wm8400 *wm8400, u8 reg)
172 {
173 u16 val;
174
175 mutex_lock(&wm8400->io_lock);
176
177 wm8400_read(wm8400, reg, 1, &val);
178
179 mutex_unlock(&wm8400->io_lock);
180
181 return val;
182 }
183 EXPORT_SYMBOL_GPL(wm8400_reg_read);
184
185 int wm8400_block_read(struct wm8400 *wm8400, u8 reg, int count, u16 *data)
186 {
187 int ret;
188
189 mutex_lock(&wm8400->io_lock);
190
191 ret = wm8400_read(wm8400, reg, count, data);
192
193 mutex_unlock(&wm8400->io_lock);
194
195 return ret;
196 }
197 EXPORT_SYMBOL_GPL(wm8400_block_read);
198
199 /**
200 * wm8400_set_bits - Bitmask write
201 *
202 * @wm8400: Pointer to wm8400 control structure
203 * @reg: Register to access
204 * @mask: Mask of bits to change
205 * @val: Value to set for masked bits
206 */
207 int wm8400_set_bits(struct wm8400 *wm8400, u8 reg, u16 mask, u16 val)
208 {
209 u16 tmp;
210 int ret;
211
212 mutex_lock(&wm8400->io_lock);
213
214 ret = wm8400_read(wm8400, reg, 1, &tmp);
215 tmp = (tmp & ~mask) | val;
216 if (ret == 0)
217 ret = wm8400_write(wm8400, reg, 1, &tmp);
218
219 mutex_unlock(&wm8400->io_lock);
220
221 return ret;
222 }
223 EXPORT_SYMBOL_GPL(wm8400_set_bits);
224
225 /**
226 * wm8400_reset_codec_reg_cache - Reset cached codec registers to
227 * their default values.
228 */
229 void wm8400_reset_codec_reg_cache(struct wm8400 *wm8400)
230 {
231 int i;
232
233 mutex_lock(&wm8400->io_lock);
234
235 /* Reset all codec registers to their initial value */
236 for (i = 0; i < ARRAY_SIZE(wm8400->reg_cache); i++)
237 if (reg_data[i].is_codec)
238 wm8400->reg_cache[i] = reg_data[i].default_val;
239
240 mutex_unlock(&wm8400->io_lock);
241 }
242 EXPORT_SYMBOL_GPL(wm8400_reset_codec_reg_cache);
243
244 static int wm8400_register_codec(struct wm8400 *wm8400)
245 {
246 struct mfd_cell cell = {
247 .name = "wm8400-codec",
248 .driver_data = wm8400,
249 };
250
251 return mfd_add_devices(wm8400->dev, -1, &cell, 1, NULL, 0);
252 }
253
254 /*
255 * wm8400_init - Generic initialisation
256 *
257 * The WM8400 can be configured as either an I2C or SPI device. Probe
258 * functions for each bus set up the accessors then call into this to
259 * set up the device itself.
260 */
261 static int wm8400_init(struct wm8400 *wm8400,
262 struct wm8400_platform_data *pdata)
263 {
264 u16 reg;
265 int ret, i;
266
267 mutex_init(&wm8400->io_lock);
268
269 dev_set_drvdata(wm8400->dev, wm8400);
270
271 /* Check that this is actually a WM8400 */
272 ret = wm8400->read_dev(wm8400->io_data, WM8400_RESET_ID, 1, &reg);
273 if (ret != 0) {
274 dev_err(wm8400->dev, "Chip ID register read failed\n");
275 return -EIO;
276 }
277 if (be16_to_cpu(reg) != reg_data[WM8400_RESET_ID].default_val) {
278 dev_err(wm8400->dev, "Device is not a WM8400, ID is %x\n",
279 be16_to_cpu(reg));
280 return -ENODEV;
281 }
282
283 /* We don't know what state the hardware is in and since this
284 * is a PMIC we can't reset it safely so initialise the register
285 * cache from the hardware.
286 */
287 ret = wm8400->read_dev(wm8400->io_data, 0,
288 ARRAY_SIZE(wm8400->reg_cache),
289 wm8400->reg_cache);
290 if (ret != 0) {
291 dev_err(wm8400->dev, "Register cache read failed\n");
292 return -EIO;
293 }
294 for (i = 0; i < ARRAY_SIZE(wm8400->reg_cache); i++)
295 wm8400->reg_cache[i] = be16_to_cpu(wm8400->reg_cache[i]);
296
297 /* If the codec is in reset use hard coded values */
298 if (!(wm8400->reg_cache[WM8400_POWER_MANAGEMENT_1] & WM8400_CODEC_ENA))
299 for (i = 0; i < ARRAY_SIZE(wm8400->reg_cache); i++)
300 if (reg_data[i].is_codec)
301 wm8400->reg_cache[i] = reg_data[i].default_val;
302
303 ret = wm8400_read(wm8400, WM8400_ID, 1, &reg);
304 if (ret != 0) {
305 dev_err(wm8400->dev, "ID register read failed: %d\n", ret);
306 return ret;
307 }
308 reg = (reg & WM8400_CHIP_REV_MASK) >> WM8400_CHIP_REV_SHIFT;
309 dev_info(wm8400->dev, "WM8400 revision %x\n", reg);
310
311 ret = wm8400_register_codec(wm8400);
312 if (ret != 0) {
313 dev_err(wm8400->dev, "Failed to register codec\n");
314 goto err_children;
315 }
316
317 if (pdata && pdata->platform_init) {
318 ret = pdata->platform_init(wm8400->dev);
319 if (ret != 0) {
320 dev_err(wm8400->dev, "Platform init failed: %d\n",
321 ret);
322 goto err_children;
323 }
324 } else
325 dev_warn(wm8400->dev, "No platform initialisation supplied\n");
326
327 return 0;
328
329 err_children:
330 mfd_remove_devices(wm8400->dev);
331 return ret;
332 }
333
334 static void wm8400_release(struct wm8400 *wm8400)
335 {
336 mfd_remove_devices(wm8400->dev);
337 }
338
339 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
340 static int wm8400_i2c_read(void *io_data, char reg, int count, u16 *dest)
341 {
342 struct i2c_client *i2c = io_data;
343 struct i2c_msg xfer[2];
344 int ret;
345
346 /* Write register */
347 xfer[0].addr = i2c->addr;
348 xfer[0].flags = 0;
349 xfer[0].len = 1;
350 xfer[0].buf = &reg;
351
352 /* Read data */
353 xfer[1].addr = i2c->addr;
354 xfer[1].flags = I2C_M_RD;
355 xfer[1].len = count * sizeof(u16);
356 xfer[1].buf = (u8 *)dest;
357
358 ret = i2c_transfer(i2c->adapter, xfer, 2);
359 if (ret == 2)
360 ret = 0;
361 else if (ret >= 0)
362 ret = -EIO;
363
364 return ret;
365 }
366
367 static int wm8400_i2c_write(void *io_data, char reg, int count, const u16 *src)
368 {
369 struct i2c_client *i2c = io_data;
370 u8 *msg;
371 int ret;
372
373 /* We add 1 byte for device register - ideally I2C would gather. */
374 msg = kmalloc((count * sizeof(u16)) + 1, GFP_KERNEL);
375 if (msg == NULL)
376 return -ENOMEM;
377
378 msg[0] = reg;
379 memcpy(&msg[1], src, count * sizeof(u16));
380
381 ret = i2c_master_send(i2c, msg, (count * sizeof(u16)) + 1);
382
383 if (ret == (count * 2) + 1)
384 ret = 0;
385 else if (ret >= 0)
386 ret = -EIO;
387
388 kfree(msg);
389
390 return ret;
391 }
392
393 static int wm8400_i2c_probe(struct i2c_client *i2c,
394 const struct i2c_device_id *id)
395 {
396 struct wm8400 *wm8400;
397 int ret;
398
399 wm8400 = kzalloc(sizeof(struct wm8400), GFP_KERNEL);
400 if (wm8400 == NULL) {
401 ret = -ENOMEM;
402 goto err;
403 }
404
405 wm8400->io_data = i2c;
406 wm8400->read_dev = wm8400_i2c_read;
407 wm8400->write_dev = wm8400_i2c_write;
408 wm8400->dev = &i2c->dev;
409 i2c_set_clientdata(i2c, wm8400);
410
411 ret = wm8400_init(wm8400, i2c->dev.platform_data);
412 if (ret != 0)
413 goto struct_err;
414
415 return 0;
416
417 struct_err:
418 kfree(wm8400);
419 err:
420 return ret;
421 }
422
423 static int wm8400_i2c_remove(struct i2c_client *i2c)
424 {
425 struct wm8400 *wm8400 = i2c_get_clientdata(i2c);
426
427 wm8400_release(wm8400);
428 kfree(wm8400);
429
430 return 0;
431 }
432
433 static const struct i2c_device_id wm8400_i2c_id[] = {
434 { "wm8400", 0 },
435 { }
436 };
437 MODULE_DEVICE_TABLE(i2c, wm8400_i2c_id);
438
439 static struct i2c_driver wm8400_i2c_driver = {
440 .driver = {
441 .name = "WM8400",
442 .owner = THIS_MODULE,
443 },
444 .probe = wm8400_i2c_probe,
445 .remove = wm8400_i2c_remove,
446 .id_table = wm8400_i2c_id,
447 };
448 #endif
449
450 static int __init wm8400_module_init(void)
451 {
452 int ret = -ENODEV;
453
454 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
455 ret = i2c_add_driver(&wm8400_i2c_driver);
456 if (ret != 0)
457 pr_err("Failed to register I2C driver: %d\n", ret);
458 #endif
459
460 return ret;
461 }
462 subsys_initcall(wm8400_module_init);
463
464 static void __exit wm8400_module_exit(void)
465 {
466 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
467 i2c_del_driver(&wm8400_i2c_driver);
468 #endif
469 }
470 module_exit(wm8400_module_exit);
471
472 MODULE_LICENSE("GPL");
473 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
Tomato firmware and modifications.