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qlcnic: using too much stack
[wandboard.git] / drivers / mfd / twl-core.c
blob720e099e506df1297a5e71a2047fe9fae52fe98a
1 /*
2 * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
3 * and audio CODEC devices
4 *
5 * Copyright (C) 2005-2006 Texas Instruments, Inc.
6 *
7 * Modifications to defer interrupt handling to a kernel thread:
8 * Copyright (C) 2006 MontaVista Software, Inc.
9 *
10 * Based on tlv320aic23.c:
11 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
12 *
13 * Code cleanup and modifications to IRQ handler.
14 * by syed khasim <x0khasim@ti.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31 #include <linux/init.h>
32 #include <linux/mutex.h>
33 #include <linux/platform_device.h>
34 #include <linux/clk.h>
35 #include <linux/err.h>
36
37 #include <linux/regulator/machine.h>
38
39 #include <linux/i2c.h>
40 #include <linux/i2c/twl.h>
41
42 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
43 #include <plat/cpu.h>
44 #endif
45
46 /*
47 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
48 * Management and System Companion Device" chips originally designed for
49 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
50 * often at around 3 Mbit/sec, including for interrupt handling.
51 *
52 * This driver core provides genirq support for the interrupts emitted,
53 * by the various modules, and exports register access primitives.
54 *
55 * FIXME this driver currently requires use of the first interrupt line
56 * (and associated registers).
57 */
58
59 #define DRIVER_NAME "twl"
60
61 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
62 #define twl_has_keypad() true
63 #else
64 #define twl_has_keypad() false
65 #endif
66
67 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
68 #define twl_has_gpio() true
69 #else
70 #define twl_has_gpio() false
71 #endif
72
73 #if defined(CONFIG_REGULATOR_TWL4030) \
74 || defined(CONFIG_REGULATOR_TWL4030_MODULE)
75 #define twl_has_regulator() true
76 #else
77 #define twl_has_regulator() false
78 #endif
79
80 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
81 #define twl_has_madc() true
82 #else
83 #define twl_has_madc() false
84 #endif
85
86 #ifdef CONFIG_TWL4030_POWER
87 #define twl_has_power() true
88 #else
89 #define twl_has_power() false
90 #endif
91
92 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
93 #define twl_has_rtc() true
94 #else
95 #define twl_has_rtc() false
96 #endif
97
98 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
99 #define twl_has_usb() true
100 #else
101 #define twl_has_usb() false
102 #endif
103
104 #if defined(CONFIG_TWL4030_WATCHDOG) || \
105 defined(CONFIG_TWL4030_WATCHDOG_MODULE)
106 #define twl_has_watchdog() true
107 #else
108 #define twl_has_watchdog() false
109 #endif
110
111 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) ||\
112 defined(CONFIG_SND_SOC_TWL6040) || defined(CONFIG_SND_SOC_TWL6040_MODULE)
113 #define twl_has_codec() true
114 #else
115 #define twl_has_codec() false
116 #endif
117
118 /* Triton Core internal information (BEGIN) */
119
120 /* Last - for index max*/
121 #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
122
123 #define TWL_NUM_SLAVES 4
124
125 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
126 || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
127 #define twl_has_pwrbutton() true
128 #else
129 #define twl_has_pwrbutton() false
130 #endif
131
132 #define SUB_CHIP_ID0 0
133 #define SUB_CHIP_ID1 1
134 #define SUB_CHIP_ID2 2
135 #define SUB_CHIP_ID3 3
136
137 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
138
139 /* Base Address defns for twl4030_map[] */
140
141 /* subchip/slave 0 - USB ID */
142 #define TWL4030_BASEADD_USB 0x0000
143
144 /* subchip/slave 1 - AUD ID */
145 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000
146 #define TWL4030_BASEADD_GPIO 0x0098
147 #define TWL4030_BASEADD_INTBR 0x0085
148 #define TWL4030_BASEADD_PIH 0x0080
149 #define TWL4030_BASEADD_TEST 0x004C
150
151 /* subchip/slave 2 - AUX ID */
152 #define TWL4030_BASEADD_INTERRUPTS 0x00B9
153 #define TWL4030_BASEADD_LED 0x00EE
154 #define TWL4030_BASEADD_MADC 0x0000
155 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074
156 #define TWL4030_BASEADD_PRECHARGE 0x00AA
157 #define TWL4030_BASEADD_PWM0 0x00F8
158 #define TWL4030_BASEADD_PWM1 0x00FB
159 #define TWL4030_BASEADD_PWMA 0x00EF
160 #define TWL4030_BASEADD_PWMB 0x00F1
161 #define TWL4030_BASEADD_KEYPAD 0x00D2
162
163 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
164 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
165 one */
166
167 /* subchip/slave 3 - POWER ID */
168 #define TWL4030_BASEADD_BACKUP 0x0014
169 #define TWL4030_BASEADD_INT 0x002E
170 #define TWL4030_BASEADD_PM_MASTER 0x0036
171 #define TWL4030_BASEADD_PM_RECEIVER 0x005B
172 #define TWL4030_BASEADD_RTC 0x001C
173 #define TWL4030_BASEADD_SECURED_REG 0x0000
174
175 /* Triton Core internal information (END) */
176
177
178 /* subchip/slave 0 0x48 - POWER */
179 #define TWL6030_BASEADD_RTC 0x0000
180 #define TWL6030_BASEADD_MEM 0x0017
181 #define TWL6030_BASEADD_PM_MASTER 0x001F
182 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
183 #define TWL6030_BASEADD_PM_MISC 0x00E2
184 #define TWL6030_BASEADD_PM_PUPD 0x00F0
185
186 /* subchip/slave 1 0x49 - FEATURE */
187 #define TWL6030_BASEADD_USB 0x0000
188 #define TWL6030_BASEADD_GPADC_CTRL 0x002E
189 #define TWL6030_BASEADD_AUX 0x0090
190 #define TWL6030_BASEADD_PWM 0x00BA
191 #define TWL6030_BASEADD_GASGAUGE 0x00C0
192 #define TWL6030_BASEADD_PIH 0x00D0
193 #define TWL6030_BASEADD_CHARGER 0x00E0
194
195 /* subchip/slave 2 0x4A - DFT */
196 #define TWL6030_BASEADD_DIEID 0x00C0
197
198 /* subchip/slave 3 0x4B - AUDIO */
199 #define TWL6030_BASEADD_AUDIO 0x0000
200 #define TWL6030_BASEADD_RSV 0x0000
201 #define TWL6030_BASEADD_ZERO 0x0000
202
203 /* Few power values */
204 #define R_CFG_BOOT 0x05
205 #define R_PROTECT_KEY 0x0E
206
207 /* access control values for R_PROTECT_KEY */
208 #define KEY_UNLOCK1 0xce
209 #define KEY_UNLOCK2 0xec
210 #define KEY_LOCK 0x00
211
212 /* some fields in R_CFG_BOOT */
213 #define HFCLK_FREQ_19p2_MHZ (1 << 0)
214 #define HFCLK_FREQ_26_MHZ (2 << 0)
215 #define HFCLK_FREQ_38p4_MHZ (3 << 0)
216 #define HIGH_PERF_SQ (1 << 3)
217 #define CK32K_LOWPWR_EN (1 << 7)
218
219
220 /* chip-specific feature flags, for i2c_device_id.driver_data */
221 #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */
222 #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */
223 #define TWL5031 BIT(2) /* twl5031 has different registers */
224 #define TWL6030_CLASS BIT(3) /* TWL6030 class */
225
226 /*----------------------------------------------------------------------*/
227
228 /* is driver active, bound to a chip? */
229 static bool inuse;
230
231 static unsigned int twl_id;
232 unsigned int twl_rev(void)
233 {
234 return twl_id;
235 }
236 EXPORT_SYMBOL(twl_rev);
237
238 /* Structure for each TWL4030/TWL6030 Slave */
239 struct twl_client {
240 struct i2c_client *client;
241 u8 address;
242
243 /* max numb of i2c_msg required is for read =2 */
244 struct i2c_msg xfer_msg[2];
245
246 /* To lock access to xfer_msg */
247 struct mutex xfer_lock;
248 };
249
250 static struct twl_client twl_modules[TWL_NUM_SLAVES];
251
252
253 /* mapping the module id to slave id and base address */
254 struct twl_mapping {
255 unsigned char sid; /* Slave ID */
256 unsigned char base; /* base address */
257 };
258 struct twl_mapping *twl_map;
259
260 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
261 /*
262 * NOTE: don't change this table without updating the
263 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
264 * so they continue to match the order in this table.
265 */
266
267 { 0, TWL4030_BASEADD_USB },
268
269 { 1, TWL4030_BASEADD_AUDIO_VOICE },
270 { 1, TWL4030_BASEADD_GPIO },
271 { 1, TWL4030_BASEADD_INTBR },
272 { 1, TWL4030_BASEADD_PIH },
273 { 1, TWL4030_BASEADD_TEST },
274
275 { 2, TWL4030_BASEADD_KEYPAD },
276 { 2, TWL4030_BASEADD_MADC },
277 { 2, TWL4030_BASEADD_INTERRUPTS },
278 { 2, TWL4030_BASEADD_LED },
279 { 2, TWL4030_BASEADD_MAIN_CHARGE },
280 { 2, TWL4030_BASEADD_PRECHARGE },
281 { 2, TWL4030_BASEADD_PWM0 },
282 { 2, TWL4030_BASEADD_PWM1 },
283 { 2, TWL4030_BASEADD_PWMA },
284 { 2, TWL4030_BASEADD_PWMB },
285 { 2, TWL5031_BASEADD_ACCESSORY },
286 { 2, TWL5031_BASEADD_INTERRUPTS },
287
288 { 3, TWL4030_BASEADD_BACKUP },
289 { 3, TWL4030_BASEADD_INT },
290 { 3, TWL4030_BASEADD_PM_MASTER },
291 { 3, TWL4030_BASEADD_PM_RECEIVER },
292 { 3, TWL4030_BASEADD_RTC },
293 { 3, TWL4030_BASEADD_SECURED_REG },
294 };
295
296 static struct twl_mapping twl6030_map[] = {
297 /*
298 * NOTE: don't change this table without updating the
299 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
300 * so they continue to match the order in this table.
301 */
302 { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
303 { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
304 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
305 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
306 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
307
308 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
309 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
310 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
311 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
312 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
313
314 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
315 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
316 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
317 { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
318 { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
319
320 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
321 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
322 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
323 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
324 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
325 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
326 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
327
328 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
329 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
330 };
331
332 /*----------------------------------------------------------------------*/
333
334 /* Exported Functions */
335
336 /**
337 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
338 * @mod_no: module number
339 * @value: an array of num_bytes+1 containing data to write
340 * @reg: register address (just offset will do)
341 * @num_bytes: number of bytes to transfer
342 *
343 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
344 * valid data starts at Offset 1.
345 *
346 * Returns the result of operation - 0 is success
347 */
348 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
349 {
350 int ret;
351 int sid;
352 struct twl_client *twl;
353 struct i2c_msg *msg;
354
355 if (unlikely(mod_no > TWL_MODULE_LAST)) {
356 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
357 return -EPERM;
358 }
359 sid = twl_map[mod_no].sid;
360 twl = &twl_modules[sid];
361
362 if (unlikely(!inuse)) {
363 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
364 return -EPERM;
365 }
366 mutex_lock(&twl->xfer_lock);
367 /*
368 * [MSG1]: fill the register address data
369 * fill the data Tx buffer
370 */
371 msg = &twl->xfer_msg[0];
372 msg->addr = twl->address;
373 msg->len = num_bytes + 1;
374 msg->flags = 0;
375 msg->buf = value;
376 /* over write the first byte of buffer with the register address */
377 *value = twl_map[mod_no].base + reg;
378 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
379 mutex_unlock(&twl->xfer_lock);
380
381 /* i2c_transfer returns number of messages transferred */
382 if (ret != 1) {
383 pr_err("%s: i2c_write failed to transfer all messages\n",
384 DRIVER_NAME);
385 if (ret < 0)
386 return ret;
387 else
388 return -EIO;
389 } else {
390 return 0;
391 }
392 }
393 EXPORT_SYMBOL(twl_i2c_write);
394
395 /**
396 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
397 * @mod_no: module number
398 * @value: an array of num_bytes containing data to be read
399 * @reg: register address (just offset will do)
400 * @num_bytes: number of bytes to transfer
401 *
402 * Returns result of operation - num_bytes is success else failure.
403 */
404 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
405 {
406 int ret;
407 u8 val;
408 int sid;
409 struct twl_client *twl;
410 struct i2c_msg *msg;
411
412 if (unlikely(mod_no > TWL_MODULE_LAST)) {
413 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
414 return -EPERM;
415 }
416 sid = twl_map[mod_no].sid;
417 twl = &twl_modules[sid];
418
419 if (unlikely(!inuse)) {
420 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
421 return -EPERM;
422 }
423 mutex_lock(&twl->xfer_lock);
424 /* [MSG1] fill the register address data */
425 msg = &twl->xfer_msg[0];
426 msg->addr = twl->address;
427 msg->len = 1;
428 msg->flags = 0; /* Read the register value */
429 val = twl_map[mod_no].base + reg;
430 msg->buf = &val;
431 /* [MSG2] fill the data rx buffer */
432 msg = &twl->xfer_msg[1];
433 msg->addr = twl->address;
434 msg->flags = I2C_M_RD; /* Read the register value */
435 msg->len = num_bytes; /* only n bytes */
436 msg->buf = value;
437 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
438 mutex_unlock(&twl->xfer_lock);
439
440 /* i2c_transfer returns number of messages transferred */
441 if (ret != 2) {
442 pr_err("%s: i2c_read failed to transfer all messages\n",
443 DRIVER_NAME);
444 if (ret < 0)
445 return ret;
446 else
447 return -EIO;
448 } else {
449 return 0;
450 }
451 }
452 EXPORT_SYMBOL(twl_i2c_read);
453
454 /**
455 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
456 * @mod_no: module number
457 * @value: the value to be written 8 bit
458 * @reg: register address (just offset will do)
459 *
460 * Returns result of operation - 0 is success
461 */
462 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
463 {
464
465 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
466 u8 temp_buffer[2] = { 0 };
467 /* offset 1 contains the data */
468 temp_buffer[1] = value;
469 return twl_i2c_write(mod_no, temp_buffer, reg, 1);
470 }
471 EXPORT_SYMBOL(twl_i2c_write_u8);
472
473 /**
474 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
475 * @mod_no: module number
476 * @value: the value read 8 bit
477 * @reg: register address (just offset will do)
478 *
479 * Returns result of operation - 0 is success
480 */
481 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
482 {
483 return twl_i2c_read(mod_no, value, reg, 1);
484 }
485 EXPORT_SYMBOL(twl_i2c_read_u8);
486
487 /*----------------------------------------------------------------------*/
488
489 static struct device *
490 add_numbered_child(unsigned chip, const char *name, int num,
491 void *pdata, unsigned pdata_len,
492 bool can_wakeup, int irq0, int irq1)
493 {
494 struct platform_device *pdev;
495 struct twl_client *twl = &twl_modules[chip];
496 int status;
497
498 pdev = platform_device_alloc(name, num);
499 if (!pdev) {
500 dev_dbg(&twl->client->dev, "can't alloc dev\n");
501 status = -ENOMEM;
502 goto err;
503 }
504
505 device_init_wakeup(&pdev->dev, can_wakeup);
506 pdev->dev.parent = &twl->client->dev;
507
508 if (pdata) {
509 status = platform_device_add_data(pdev, pdata, pdata_len);
510 if (status < 0) {
511 dev_dbg(&pdev->dev, "can't add platform_data\n");
512 goto err;
513 }
514 }
515
516 if (irq0) {
517 struct resource r[2] = {
518 { .start = irq0, .flags = IORESOURCE_IRQ, },
519 { .start = irq1, .flags = IORESOURCE_IRQ, },
520 };
521
522 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
523 if (status < 0) {
524 dev_dbg(&pdev->dev, "can't add irqs\n");
525 goto err;
526 }
527 }
528
529 status = platform_device_add(pdev);
530
531 err:
532 if (status < 0) {
533 platform_device_put(pdev);
534 dev_err(&twl->client->dev, "can't add %s dev\n", name);
535 return ERR_PTR(status);
536 }
537 return &pdev->dev;
538 }
539
540 static inline struct device *add_child(unsigned chip, const char *name,
541 void *pdata, unsigned pdata_len,
542 bool can_wakeup, int irq0, int irq1)
543 {
544 return add_numbered_child(chip, name, -1, pdata, pdata_len,
545 can_wakeup, irq0, irq1);
546 }
547
548 static struct device *
549 add_regulator_linked(int num, struct regulator_init_data *pdata,
550 struct regulator_consumer_supply *consumers,
551 unsigned num_consumers)
552 {
553 unsigned sub_chip_id;
554 /* regulator framework demands init_data ... */
555 if (!pdata)
556 return NULL;
557
558 if (consumers) {
559 pdata->consumer_supplies = consumers;
560 pdata->num_consumer_supplies = num_consumers;
561 }
562
563 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
564 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
565 return add_numbered_child(sub_chip_id, "twl_reg", num,
566 pdata, sizeof(*pdata), false, 0, 0);
567 }
568
569 static struct device *
570 add_regulator(int num, struct regulator_init_data *pdata)
571 {
572 return add_regulator_linked(num, pdata, NULL, 0);
573 }
574
575 /*
576 * NOTE: We know the first 8 IRQs after pdata->base_irq are
577 * for the PIH, and the next are for the PWR_INT SIH, since
578 * that's how twl_init_irq() sets things up.
579 */
580
581 static int
582 add_children(struct twl4030_platform_data *pdata, unsigned long features)
583 {
584 struct device *child;
585 unsigned sub_chip_id;
586
587 if (twl_has_gpio() && pdata->gpio) {
588 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
589 pdata->gpio, sizeof(*pdata->gpio),
590 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
591 if (IS_ERR(child))
592 return PTR_ERR(child);
593 }
594
595 if (twl_has_keypad() && pdata->keypad) {
596 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
597 pdata->keypad, sizeof(*pdata->keypad),
598 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
599 if (IS_ERR(child))
600 return PTR_ERR(child);
601 }
602
603 if (twl_has_madc() && pdata->madc) {
604 child = add_child(2, "twl4030_madc",
605 pdata->madc, sizeof(*pdata->madc),
606 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
607 if (IS_ERR(child))
608 return PTR_ERR(child);
609 }
610
611 if (twl_has_rtc()) {
612 /*
613 * REVISIT platform_data here currently might expose the
614 * "msecure" line ... but for now we just expect board
615 * setup to tell the chip "it's always ok to SET_TIME".
616 * Eventually, Linux might become more aware of such
617 * HW security concerns, and "least privilege".
618 */
619 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
620 child = add_child(sub_chip_id, "twl_rtc",
621 NULL, 0,
622 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
623 if (IS_ERR(child))
624 return PTR_ERR(child);
625 }
626
627 if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
628
629 static struct regulator_consumer_supply usb1v5 = {
630 .supply = "usb1v5",
631 };
632 static struct regulator_consumer_supply usb1v8 = {
633 .supply = "usb1v8",
634 };
635 static struct regulator_consumer_supply usb3v1 = {
636 .supply = "usb3v1",
637 };
638
639 /* First add the regulators so that they can be used by transceiver */
640 if (twl_has_regulator()) {
641 /* this is a template that gets copied */
642 struct regulator_init_data usb_fixed = {
643 .constraints.valid_modes_mask =
644 REGULATOR_MODE_NORMAL
645 | REGULATOR_MODE_STANDBY,
646 .constraints.valid_ops_mask =
647 REGULATOR_CHANGE_MODE
648 | REGULATOR_CHANGE_STATUS,
649 };
650
651 child = add_regulator_linked(TWL4030_REG_VUSB1V5,
652 &usb_fixed, &usb1v5, 1);
653 if (IS_ERR(child))
654 return PTR_ERR(child);
655
656 child = add_regulator_linked(TWL4030_REG_VUSB1V8,
657 &usb_fixed, &usb1v8, 1);
658 if (IS_ERR(child))
659 return PTR_ERR(child);
660
661 child = add_regulator_linked(TWL4030_REG_VUSB3V1,
662 &usb_fixed, &usb3v1, 1);
663 if (IS_ERR(child))
664 return PTR_ERR(child);
665
666 }
667
668 child = add_child(0, "twl4030_usb",
669 pdata->usb, sizeof(*pdata->usb),
670 true,
671 /* irq0 = USB_PRES, irq1 = USB */
672 pdata->irq_base + USB_PRES_INTR_OFFSET,
673 pdata->irq_base + USB_INTR_OFFSET);
674
675 if (IS_ERR(child))
676 return PTR_ERR(child);
677
678 /* we need to connect regulators to this transceiver */
679 if (twl_has_regulator() && child) {
680 usb1v5.dev = child;
681 usb1v8.dev = child;
682 usb3v1.dev = child;
683 }
684 }
685
686 if (twl_has_watchdog()) {
687 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
688 if (IS_ERR(child))
689 return PTR_ERR(child);
690 }
691
692 if (twl_has_pwrbutton()) {
693 child = add_child(1, "twl4030_pwrbutton",
694 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
695 if (IS_ERR(child))
696 return PTR_ERR(child);
697 }
698
699 if (twl_has_codec() && pdata->codec && twl_class_is_4030()) {
700 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
701 child = add_child(sub_chip_id, "twl4030_codec",
702 pdata->codec, sizeof(*pdata->codec),
703 false, 0, 0);
704 if (IS_ERR(child))
705 return PTR_ERR(child);
706 }
707
708 /* Phoenix*/
709 if (twl_has_codec() && pdata->codec && twl_class_is_6030()) {
710 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
711 child = add_child(sub_chip_id, "twl6040_codec",
712 pdata->codec, sizeof(*pdata->codec),
713 false, 0, 0);
714 if (IS_ERR(child))
715 return PTR_ERR(child);
716 }
717
718 /* twl4030 regulators */
719 if (twl_has_regulator() && twl_class_is_4030()) {
720 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
721 if (IS_ERR(child))
722 return PTR_ERR(child);
723
724 child = add_regulator(TWL4030_REG_VIO, pdata->vio);
725 if (IS_ERR(child))
726 return PTR_ERR(child);
727
728 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1);
729 if (IS_ERR(child))
730 return PTR_ERR(child);
731
732 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2);
733 if (IS_ERR(child))
734 return PTR_ERR(child);
735
736 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
737 if (IS_ERR(child))
738 return PTR_ERR(child);
739
740 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
741 if (IS_ERR(child))
742 return PTR_ERR(child);
743
744 child = add_regulator((features & TWL4030_VAUX2)
745 ? TWL4030_REG_VAUX2_4030
746 : TWL4030_REG_VAUX2,
747 pdata->vaux2);
748 if (IS_ERR(child))
749 return PTR_ERR(child);
750
751 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1);
752 if (IS_ERR(child))
753 return PTR_ERR(child);
754
755 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2);
756 if (IS_ERR(child))
757 return PTR_ERR(child);
758
759 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig);
760 if (IS_ERR(child))
761 return PTR_ERR(child);
762 }
763
764 /* maybe add LDOs that are omitted on cost-reduced parts */
765 if (twl_has_regulator() && !(features & TPS_SUBSET)
766 && twl_class_is_4030()) {
767 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
768 if (IS_ERR(child))
769 return PTR_ERR(child);
770
771 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
772 if (IS_ERR(child))
773 return PTR_ERR(child);
774
775 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
776 if (IS_ERR(child))
777 return PTR_ERR(child);
778
779 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
780 if (IS_ERR(child))
781 return PTR_ERR(child);
782
783 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
784 if (IS_ERR(child))
785 return PTR_ERR(child);
786
787 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
788 if (IS_ERR(child))
789 return PTR_ERR(child);
790 }
791
792 /* twl6030 regulators */
793 if (twl_has_regulator() && twl_class_is_6030()) {
794 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc);
795 if (IS_ERR(child))
796 return PTR_ERR(child);
797
798 child = add_regulator(TWL6030_REG_VPP, pdata->vpp);
799 if (IS_ERR(child))
800 return PTR_ERR(child);
801
802 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim);
803 if (IS_ERR(child))
804 return PTR_ERR(child);
805
806 child = add_regulator(TWL6030_REG_VANA, pdata->vana);
807 if (IS_ERR(child))
808 return PTR_ERR(child);
809
810 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio);
811 if (IS_ERR(child))
812 return PTR_ERR(child);
813
814 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac);
815 if (IS_ERR(child))
816 return PTR_ERR(child);
817
818 child = add_regulator(TWL6030_REG_VUSB, pdata->vusb);
819 if (IS_ERR(child))
820 return PTR_ERR(child);
821
822 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1);
823 if (IS_ERR(child))
824 return PTR_ERR(child);
825
826 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2);
827 if (IS_ERR(child))
828 return PTR_ERR(child);
829
830 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3);
831 if (IS_ERR(child))
832 return PTR_ERR(child);
833 }
834
835 return 0;
836 }
837
838 /*----------------------------------------------------------------------*/
839
840 /*
841 * These three functions initialize the on-chip clock framework,
842 * letting it generate the right frequencies for USB, MADC, and
843 * other purposes.
844 */
845 static inline int __init protect_pm_master(void)
846 {
847 int e = 0;
848
849 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_LOCK,
850 R_PROTECT_KEY);
851 return e;
852 }
853
854 static inline int __init unprotect_pm_master(void)
855 {
856 int e = 0;
857
858 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK1,
859 R_PROTECT_KEY);
860 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK2,
861 R_PROTECT_KEY);
862 return e;
863 }
864
865 static void clocks_init(struct device *dev,
866 struct twl4030_clock_init_data *clock)
867 {
868 int e = 0;
869 struct clk *osc;
870 u32 rate;
871 u8 ctrl = HFCLK_FREQ_26_MHZ;
872
873 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
874 if (cpu_is_omap2430())
875 osc = clk_get(dev, "osc_ck");
876 else
877 osc = clk_get(dev, "osc_sys_ck");
878
879 if (IS_ERR(osc)) {
880 printk(KERN_WARNING "Skipping twl internal clock init and "
881 "using bootloader value (unknown osc rate)\n");
882 return;
883 }
884
885 rate = clk_get_rate(osc);
886 clk_put(osc);
887
888 #else
889 /* REVISIT for non-OMAP systems, pass the clock rate from
890 * board init code, using platform_data.
891 */
892 osc = ERR_PTR(-EIO);
893
894 printk(KERN_WARNING "Skipping twl internal clock init and "
895 "using bootloader value (unknown osc rate)\n");
896
897 return;
898 #endif
899
900 switch (rate) {
901 case 19200000:
902 ctrl = HFCLK_FREQ_19p2_MHZ;
903 break;
904 case 26000000:
905 ctrl = HFCLK_FREQ_26_MHZ;
906 break;
907 case 38400000:
908 ctrl = HFCLK_FREQ_38p4_MHZ;
909 break;
910 }
911
912 ctrl |= HIGH_PERF_SQ;
913 if (clock && clock->ck32k_lowpwr_enable)
914 ctrl |= CK32K_LOWPWR_EN;
915
916 e |= unprotect_pm_master();
917 /* effect->MADC+USB ck en */
918 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
919 e |= protect_pm_master();
920
921 if (e < 0)
922 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
923 }
924
925 /*----------------------------------------------------------------------*/
926
927 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
928 int twl4030_exit_irq(void);
929 int twl4030_init_chip_irq(const char *chip);
930 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
931 int twl6030_exit_irq(void);
932
933 static int twl_remove(struct i2c_client *client)
934 {
935 unsigned i;
936 int status;
937
938 if (twl_class_is_4030())
939 status = twl4030_exit_irq();
940 else
941 status = twl6030_exit_irq();
942
943 if (status < 0)
944 return status;
945
946 for (i = 0; i < TWL_NUM_SLAVES; i++) {
947 struct twl_client *twl = &twl_modules[i];
948
949 if (twl->client && twl->client != client)
950 i2c_unregister_device(twl->client);
951 twl_modules[i].client = NULL;
952 }
953 inuse = false;
954 return 0;
955 }
956
957 /* NOTE: this driver only handles a single twl4030/tps659x0 chip */
958 static int __init
959 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
960 {
961 int status;
962 unsigned i;
963 struct twl4030_platform_data *pdata = client->dev.platform_data;
964 u8 temp;
965
966 if (!pdata) {
967 dev_dbg(&client->dev, "no platform data?\n");
968 return -EINVAL;
969 }
970
971 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
972 dev_dbg(&client->dev, "can't talk I2C?\n");
973 return -EIO;
974 }
975
976 if (inuse) {
977 dev_dbg(&client->dev, "driver is already in use\n");
978 return -EBUSY;
979 }
980
981 for (i = 0; i < TWL_NUM_SLAVES; i++) {
982 struct twl_client *twl = &twl_modules[i];
983
984 twl->address = client->addr + i;
985 if (i == 0)
986 twl->client = client;
987 else {
988 twl->client = i2c_new_dummy(client->adapter,
989 twl->address);
990 if (!twl->client) {
991 dev_err(&client->dev,
992 "can't attach client %d\n", i);
993 status = -ENOMEM;
994 goto fail;
995 }
996 }
997 mutex_init(&twl->xfer_lock);
998 }
999 inuse = true;
1000 if ((id->driver_data) & TWL6030_CLASS) {
1001 twl_id = TWL6030_CLASS_ID;
1002 twl_map = &twl6030_map[0];
1003 } else {
1004 twl_id = TWL4030_CLASS_ID;
1005 twl_map = &twl4030_map[0];
1006 }
1007
1008 /* setup clock framework */
1009 clocks_init(&client->dev, pdata->clock);
1010
1011 /* load power event scripts */
1012 if (twl_has_power() && pdata->power)
1013 twl4030_power_init(pdata->power);
1014
1015 /* Maybe init the T2 Interrupt subsystem */
1016 if (client->irq
1017 && pdata->irq_base
1018 && pdata->irq_end > pdata->irq_base) {
1019 if (twl_class_is_4030()) {
1020 twl4030_init_chip_irq(id->name);
1021 status = twl4030_init_irq(client->irq, pdata->irq_base,
1022 pdata->irq_end);
1023 } else {
1024 status = twl6030_init_irq(client->irq, pdata->irq_base,
1025 pdata->irq_end);
1026 }
1027
1028 if (status < 0)
1029 goto fail;
1030 }
1031
1032 /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1033 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1034 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1035 */
1036
1037 if (twl_class_is_4030()) {
1038 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1039 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1040 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1041 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1042 }
1043
1044 status = add_children(pdata, id->driver_data);
1045 fail:
1046 if (status < 0)
1047 twl_remove(client);
1048 return status;
1049 }
1050
1051 static const struct i2c_device_id twl_ids[] = {
1052 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
1053 { "twl5030", 0 }, /* T2 updated */
1054 { "twl5031", TWL5031 }, /* TWL5030 updated */
1055 { "tps65950", 0 }, /* catalog version of twl5030 */
1056 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
1057 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
1058 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
1059 { /* end of list */ },
1060 };
1061 MODULE_DEVICE_TABLE(i2c, twl_ids);
1062
1063 /* One Client Driver , 4 Clients */
1064 static struct i2c_driver twl_driver = {
1065 .driver.name = DRIVER_NAME,
1066 .id_table = twl_ids,
1067 .probe = twl_probe,
1068 .remove = twl_remove,
1069 };
1070
1071 static int __init twl_init(void)
1072 {
1073 return i2c_add_driver(&twl_driver);
1074 }
1075 subsys_initcall(twl_init);
1076
1077 static void __exit twl_exit(void)
1078 {
1079 i2c_del_driver(&twl_driver);
1080 }
1081 module_exit(twl_exit);
1082
1083 MODULE_AUTHOR("Texas Instruments, Inc.");
1084 MODULE_DESCRIPTION("I2C Core interface for TWL");
1085 MODULE_LICENSE("GPL");
WandBoard kernel