aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mfd/twl-core.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd/twl-core.c')
-rw-r--r--drivers/mfd/twl-core.c1076
1 files changed, 1076 insertions, 0 deletions
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
new file mode 100644
index 000000000000..2a7606534196
--- /dev/null
+++ b/drivers/mfd/twl-core.c
@@ -0,0 +1,1076 @@
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_TWL4030_BCI_BATTERY) || \
62 defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
63#define twl_has_bci() true
64#else
65#define twl_has_bci() false
66#endif
67
68#if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
69#define twl_has_keypad() true
70#else
71#define twl_has_keypad() false
72#endif
73
74#if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
75#define twl_has_gpio() true
76#else
77#define twl_has_gpio() false
78#endif
79
80#if defined(CONFIG_REGULATOR_TWL4030) \
81 || defined(CONFIG_REGULATOR_TWL4030_MODULE)
82#define twl_has_regulator() true
83#else
84#define twl_has_regulator() false
85#endif
86
87#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
88#define twl_has_madc() true
89#else
90#define twl_has_madc() false
91#endif
92
93#ifdef CONFIG_TWL4030_POWER
94#define twl_has_power() true
95#else
96#define twl_has_power() false
97#endif
98
99#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
100#define twl_has_rtc() true
101#else
102#define twl_has_rtc() false
103#endif
104
105#if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
106#define twl_has_usb() true
107#else
108#define twl_has_usb() false
109#endif
110
111#if defined(CONFIG_TWL4030_WATCHDOG) || \
112 defined(CONFIG_TWL4030_WATCHDOG_MODULE)
113#define twl_has_watchdog() true
114#else
115#define twl_has_watchdog() false
116#endif
117
118#if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE)
119#define twl_has_codec() true
120#else
121#define twl_has_codec() false
122#endif
123
124/* Triton Core internal information (BEGIN) */
125
126/* Last - for index max*/
127#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
128
129#define TWL_NUM_SLAVES 4
130
131#if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
132 || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
133#define twl_has_pwrbutton() true
134#else
135#define twl_has_pwrbutton() false
136#endif
137
138#define SUB_CHIP_ID0 0
139#define SUB_CHIP_ID1 1
140#define SUB_CHIP_ID2 2
141#define SUB_CHIP_ID3 3
142
143#define TWL_MODULE_LAST TWL4030_MODULE_LAST
144
145/* Base Address defns for twl4030_map[] */
146
147/* subchip/slave 0 - USB ID */
148#define TWL4030_BASEADD_USB 0x0000
149
150/* subchip/slave 1 - AUD ID */
151#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
152#define TWL4030_BASEADD_GPIO 0x0098
153#define TWL4030_BASEADD_INTBR 0x0085
154#define TWL4030_BASEADD_PIH 0x0080
155#define TWL4030_BASEADD_TEST 0x004C
156
157/* subchip/slave 2 - AUX ID */
158#define TWL4030_BASEADD_INTERRUPTS 0x00B9
159#define TWL4030_BASEADD_LED 0x00EE
160#define TWL4030_BASEADD_MADC 0x0000
161#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
162#define TWL4030_BASEADD_PRECHARGE 0x00AA
163#define TWL4030_BASEADD_PWM0 0x00F8
164#define TWL4030_BASEADD_PWM1 0x00FB
165#define TWL4030_BASEADD_PWMA 0x00EF
166#define TWL4030_BASEADD_PWMB 0x00F1
167#define TWL4030_BASEADD_KEYPAD 0x00D2
168
169#define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
170#define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
171 one */
172
173/* subchip/slave 3 - POWER ID */
174#define TWL4030_BASEADD_BACKUP 0x0014
175#define TWL4030_BASEADD_INT 0x002E
176#define TWL4030_BASEADD_PM_MASTER 0x0036
177#define TWL4030_BASEADD_PM_RECEIVER 0x005B
178#define TWL4030_BASEADD_RTC 0x001C
179#define TWL4030_BASEADD_SECURED_REG 0x0000
180
181/* Triton Core internal information (END) */
182
183
184/* subchip/slave 0 0x48 - POWER */
185#define TWL6030_BASEADD_RTC 0x0000
186#define TWL6030_BASEADD_MEM 0x0017
187#define TWL6030_BASEADD_PM_MASTER 0x001F
188#define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
189#define TWL6030_BASEADD_PM_MISC 0x00E2
190#define TWL6030_BASEADD_PM_PUPD 0x00F0
191
192/* subchip/slave 1 0x49 - FEATURE */
193#define TWL6030_BASEADD_USB 0x0000
194#define TWL6030_BASEADD_GPADC_CTRL 0x002E
195#define TWL6030_BASEADD_AUX 0x0090
196#define TWL6030_BASEADD_PWM 0x00BA
197#define TWL6030_BASEADD_GASGAUGE 0x00C0
198#define TWL6030_BASEADD_PIH 0x00D0
199#define TWL6030_BASEADD_CHARGER 0x00E0
200
201/* subchip/slave 2 0x4A - DFT */
202#define TWL6030_BASEADD_DIEID 0x00C0
203
204/* subchip/slave 3 0x4B - AUDIO */
205#define TWL6030_BASEADD_AUDIO 0x0000
206#define TWL6030_BASEADD_RSV 0x0000
207
208/* Few power values */
209#define R_CFG_BOOT 0x05
210#define R_PROTECT_KEY 0x0E
211
212/* access control values for R_PROTECT_KEY */
213#define KEY_UNLOCK1 0xce
214#define KEY_UNLOCK2 0xec
215#define KEY_LOCK 0x00
216
217/* some fields in R_CFG_BOOT */
218#define HFCLK_FREQ_19p2_MHZ (1 << 0)
219#define HFCLK_FREQ_26_MHZ (2 << 0)
220#define HFCLK_FREQ_38p4_MHZ (3 << 0)
221#define HIGH_PERF_SQ (1 << 3)
222#define CK32K_LOWPWR_EN (1 << 7)
223
224
225/* chip-specific feature flags, for i2c_device_id.driver_data */
226#define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */
227#define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */
228#define TWL5031 BIT(2) /* twl5031 has different registers */
229#define TWL6030_CLASS BIT(3) /* TWL6030 class */
230
231/*----------------------------------------------------------------------*/
232
233/* is driver active, bound to a chip? */
234static bool inuse;
235
236static unsigned int twl_id;
237unsigned int twl_rev(void)
238{
239 return twl_id;
240}
241EXPORT_SYMBOL(twl_rev);
242
243/* Structure for each TWL4030/TWL6030 Slave */
244struct twl_client {
245 struct i2c_client *client;
246 u8 address;
247
248 /* max numb of i2c_msg required is for read =2 */
249 struct i2c_msg xfer_msg[2];
250
251 /* To lock access to xfer_msg */
252 struct mutex xfer_lock;
253};
254
255static struct twl_client twl_modules[TWL_NUM_SLAVES];
256
257
258/* mapping the module id to slave id and base address */
259struct twl_mapping {
260 unsigned char sid; /* Slave ID */
261 unsigned char base; /* base address */
262};
263struct twl_mapping *twl_map;
264
265static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
266 /*
267 * NOTE: don't change this table without updating the
268 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
269 * so they continue to match the order in this table.
270 */
271
272 { 0, TWL4030_BASEADD_USB },
273
274 { 1, TWL4030_BASEADD_AUDIO_VOICE },
275 { 1, TWL4030_BASEADD_GPIO },
276 { 1, TWL4030_BASEADD_INTBR },
277 { 1, TWL4030_BASEADD_PIH },
278 { 1, TWL4030_BASEADD_TEST },
279
280 { 2, TWL4030_BASEADD_KEYPAD },
281 { 2, TWL4030_BASEADD_MADC },
282 { 2, TWL4030_BASEADD_INTERRUPTS },
283 { 2, TWL4030_BASEADD_LED },
284 { 2, TWL4030_BASEADD_MAIN_CHARGE },
285 { 2, TWL4030_BASEADD_PRECHARGE },
286 { 2, TWL4030_BASEADD_PWM0 },
287 { 2, TWL4030_BASEADD_PWM1 },
288 { 2, TWL4030_BASEADD_PWMA },
289 { 2, TWL4030_BASEADD_PWMB },
290 { 2, TWL5031_BASEADD_ACCESSORY },
291 { 2, TWL5031_BASEADD_INTERRUPTS },
292
293 { 3, TWL4030_BASEADD_BACKUP },
294 { 3, TWL4030_BASEADD_INT },
295 { 3, TWL4030_BASEADD_PM_MASTER },
296 { 3, TWL4030_BASEADD_PM_RECEIVER },
297 { 3, TWL4030_BASEADD_RTC },
298 { 3, TWL4030_BASEADD_SECURED_REG },
299};
300
301static struct twl_mapping twl6030_map[] = {
302 /*
303 * NOTE: don't change this table without updating the
304 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
305 * so they continue to match the order in this table.
306 */
307 { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
308 { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
309 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
310 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
311 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
312
313 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
314 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
315 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
316 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
317 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
318
319 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
320 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
321 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
322 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
323 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
324
325 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
326 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
327 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
328 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
329 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
330
331 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
332 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
333};
334
335/*----------------------------------------------------------------------*/
336
337/* Exported Functions */
338
339/**
340 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
341 * @mod_no: module number
342 * @value: an array of num_bytes+1 containing data to write
343 * @reg: register address (just offset will do)
344 * @num_bytes: number of bytes to transfer
345 *
346 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
347 * valid data starts at Offset 1.
348 *
349 * Returns the result of operation - 0 is success
350 */
351int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
352{
353 int ret;
354 int sid;
355 struct twl_client *twl;
356 struct i2c_msg *msg;
357
358 if (unlikely(mod_no > TWL_MODULE_LAST)) {
359 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
360 return -EPERM;
361 }
362 sid = twl_map[mod_no].sid;
363 twl = &twl_modules[sid];
364
365 if (unlikely(!inuse)) {
366 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
367 return -EPERM;
368 }
369 mutex_lock(&twl->xfer_lock);
370 /*
371 * [MSG1]: fill the register address data
372 * fill the data Tx buffer
373 */
374 msg = &twl->xfer_msg[0];
375 msg->addr = twl->address;
376 msg->len = num_bytes + 1;
377 msg->flags = 0;
378 msg->buf = value;
379 /* over write the first byte of buffer with the register address */
380 *value = twl_map[mod_no].base + reg;
381 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
382 mutex_unlock(&twl->xfer_lock);
383
384 /* i2c_transfer returns number of messages transferred */
385 if (ret != 1) {
386 pr_err("%s: i2c_write failed to transfer all messages\n",
387 DRIVER_NAME);
388 if (ret < 0)
389 return ret;
390 else
391 return -EIO;
392 } else {
393 return 0;
394 }
395}
396EXPORT_SYMBOL(twl_i2c_write);
397
398/**
399 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
400 * @mod_no: module number
401 * @value: an array of num_bytes containing data to be read
402 * @reg: register address (just offset will do)
403 * @num_bytes: number of bytes to transfer
404 *
405 * Returns result of operation - num_bytes is success else failure.
406 */
407int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
408{
409 int ret;
410 u8 val;
411 int sid;
412 struct twl_client *twl;
413 struct i2c_msg *msg;
414
415 if (unlikely(mod_no > TWL_MODULE_LAST)) {
416 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
417 return -EPERM;
418 }
419 sid = twl_map[mod_no].sid;
420 twl = &twl_modules[sid];
421
422 if (unlikely(!inuse)) {
423 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
424 return -EPERM;
425 }
426 mutex_lock(&twl->xfer_lock);
427 /* [MSG1] fill the register address data */
428 msg = &twl->xfer_msg[0];
429 msg->addr = twl->address;
430 msg->len = 1;
431 msg->flags = 0; /* Read the register value */
432 val = twl_map[mod_no].base + reg;
433 msg->buf = &val;
434 /* [MSG2] fill the data rx buffer */
435 msg = &twl->xfer_msg[1];
436 msg->addr = twl->address;
437 msg->flags = I2C_M_RD; /* Read the register value */
438 msg->len = num_bytes; /* only n bytes */
439 msg->buf = value;
440 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
441 mutex_unlock(&twl->xfer_lock);
442
443 /* i2c_transfer returns number of messages transferred */
444 if (ret != 2) {
445 pr_err("%s: i2c_read failed to transfer all messages\n",
446 DRIVER_NAME);
447 if (ret < 0)
448 return ret;
449 else
450 return -EIO;
451 } else {
452 return 0;
453 }
454}
455EXPORT_SYMBOL(twl_i2c_read);
456
457/**
458 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
459 * @mod_no: module number
460 * @value: the value to be written 8 bit
461 * @reg: register address (just offset will do)
462 *
463 * Returns result of operation - 0 is success
464 */
465int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
466{
467
468 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
469 u8 temp_buffer[2] = { 0 };
470 /* offset 1 contains the data */
471 temp_buffer[1] = value;
472 return twl_i2c_write(mod_no, temp_buffer, reg, 1);
473}
474EXPORT_SYMBOL(twl_i2c_write_u8);
475
476/**
477 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
478 * @mod_no: module number
479 * @value: the value read 8 bit
480 * @reg: register address (just offset will do)
481 *
482 * Returns result of operation - 0 is success
483 */
484int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
485{
486 return twl_i2c_read(mod_no, value, reg, 1);
487}
488EXPORT_SYMBOL(twl_i2c_read_u8);
489
490/*----------------------------------------------------------------------*/
491
492static struct device *
493add_numbered_child(unsigned chip, const char *name, int num,
494 void *pdata, unsigned pdata_len,
495 bool can_wakeup, int irq0, int irq1)
496{
497 struct platform_device *pdev;
498 struct twl_client *twl = &twl_modules[chip];
499 int status;
500
501 pdev = platform_device_alloc(name, num);
502 if (!pdev) {
503 dev_dbg(&twl->client->dev, "can't alloc dev\n");
504 status = -ENOMEM;
505 goto err;
506 }
507
508 device_init_wakeup(&pdev->dev, can_wakeup);
509 pdev->dev.parent = &twl->client->dev;
510
511 if (pdata) {
512 status = platform_device_add_data(pdev, pdata, pdata_len);
513 if (status < 0) {
514 dev_dbg(&pdev->dev, "can't add platform_data\n");
515 goto err;
516 }
517 }
518
519 if (irq0) {
520 struct resource r[2] = {
521 { .start = irq0, .flags = IORESOURCE_IRQ, },
522 { .start = irq1, .flags = IORESOURCE_IRQ, },
523 };
524
525 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
526 if (status < 0) {
527 dev_dbg(&pdev->dev, "can't add irqs\n");
528 goto err;
529 }
530 }
531
532 status = platform_device_add(pdev);
533
534err:
535 if (status < 0) {
536 platform_device_put(pdev);
537 dev_err(&twl->client->dev, "can't add %s dev\n", name);
538 return ERR_PTR(status);
539 }
540 return &pdev->dev;
541}
542
543static inline struct device *add_child(unsigned chip, const char *name,
544 void *pdata, unsigned pdata_len,
545 bool can_wakeup, int irq0, int irq1)
546{
547 return add_numbered_child(chip, name, -1, pdata, pdata_len,
548 can_wakeup, irq0, irq1);
549}
550
551static struct device *
552add_regulator_linked(int num, struct regulator_init_data *pdata,
553 struct regulator_consumer_supply *consumers,
554 unsigned num_consumers)
555{
556 unsigned sub_chip_id;
557 /* regulator framework demands init_data ... */
558 if (!pdata)
559 return NULL;
560
561 if (consumers) {
562 pdata->consumer_supplies = consumers;
563 pdata->num_consumer_supplies = num_consumers;
564 }
565
566 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
567 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
568 return add_numbered_child(sub_chip_id, "twl_reg", num,
569 pdata, sizeof(*pdata), false, 0, 0);
570}
571
572static struct device *
573add_regulator(int num, struct regulator_init_data *pdata)
574{
575 return add_regulator_linked(num, pdata, NULL, 0);
576}
577
578/*
579 * NOTE: We know the first 8 IRQs after pdata->base_irq are
580 * for the PIH, and the next are for the PWR_INT SIH, since
581 * that's how twl_init_irq() sets things up.
582 */
583
584static int
585add_children(struct twl4030_platform_data *pdata, unsigned long features)
586{
587 struct device *child;
588 unsigned sub_chip_id;
589
590 if (twl_has_bci() && pdata->bci &&
591 !(features & (TPS_SUBSET | TWL5031))) {
592 child = add_child(3, "twl4030_bci",
593 pdata->bci, sizeof(*pdata->bci),
594 false,
595 /* irq0 = CHG_PRES, irq1 = BCI */
596 pdata->irq_base + BCI_PRES_INTR_OFFSET,
597 pdata->irq_base + BCI_INTR_OFFSET);
598 if (IS_ERR(child))
599 return PTR_ERR(child);
600 }
601
602 if (twl_has_gpio() && pdata->gpio) {
603 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
604 pdata->gpio, sizeof(*pdata->gpio),
605 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
606 if (IS_ERR(child))
607 return PTR_ERR(child);
608 }
609
610 if (twl_has_keypad() && pdata->keypad) {
611 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
612 pdata->keypad, sizeof(*pdata->keypad),
613 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
614 if (IS_ERR(child))
615 return PTR_ERR(child);
616 }
617
618 if (twl_has_madc() && pdata->madc) {
619 child = add_child(2, "twl4030_madc",
620 pdata->madc, sizeof(*pdata->madc),
621 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
622 if (IS_ERR(child))
623 return PTR_ERR(child);
624 }
625
626 if (twl_has_rtc()) {
627 /*
628 * REVISIT platform_data here currently might expose the
629 * "msecure" line ... but for now we just expect board
630 * setup to tell the chip "it's always ok to SET_TIME".
631 * Eventually, Linux might become more aware of such
632 * HW security concerns, and "least privilege".
633 */
634 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
635 child = add_child(sub_chip_id, "twl_rtc",
636 NULL, 0,
637 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
638 if (IS_ERR(child))
639 return PTR_ERR(child);
640 }
641
642 if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
643
644 static struct regulator_consumer_supply usb1v5 = {
645 .supply = "usb1v5",
646 };
647 static struct regulator_consumer_supply usb1v8 = {
648 .supply = "usb1v8",
649 };
650 static struct regulator_consumer_supply usb3v1 = {
651 .supply = "usb3v1",
652 };
653
654 /* First add the regulators so that they can be used by transceiver */
655 if (twl_has_regulator()) {
656 /* this is a template that gets copied */
657 struct regulator_init_data usb_fixed = {
658 .constraints.valid_modes_mask =
659 REGULATOR_MODE_NORMAL
660 | REGULATOR_MODE_STANDBY,
661 .constraints.valid_ops_mask =
662 REGULATOR_CHANGE_MODE
663 | REGULATOR_CHANGE_STATUS,
664 };
665
666 child = add_regulator_linked(TWL4030_REG_VUSB1V5,
667 &usb_fixed, &usb1v5, 1);
668 if (IS_ERR(child))
669 return PTR_ERR(child);
670
671 child = add_regulator_linked(TWL4030_REG_VUSB1V8,
672 &usb_fixed, &usb1v8, 1);
673 if (IS_ERR(child))
674 return PTR_ERR(child);
675
676 child = add_regulator_linked(TWL4030_REG_VUSB3V1,
677 &usb_fixed, &usb3v1, 1);
678 if (IS_ERR(child))
679 return PTR_ERR(child);
680
681 }
682
683 child = add_child(0, "twl4030_usb",
684 pdata->usb, sizeof(*pdata->usb),
685 true,
686 /* irq0 = USB_PRES, irq1 = USB */
687 pdata->irq_base + USB_PRES_INTR_OFFSET,
688 pdata->irq_base + USB_INTR_OFFSET);
689
690 if (IS_ERR(child))
691 return PTR_ERR(child);
692
693 /* we need to connect regulators to this transceiver */
694 if (twl_has_regulator() && child) {
695 usb1v5.dev = child;
696 usb1v8.dev = child;
697 usb3v1.dev = child;
698 }
699 }
700
701 if (twl_has_watchdog()) {
702 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
703 if (IS_ERR(child))
704 return PTR_ERR(child);
705 }
706
707 if (twl_has_pwrbutton()) {
708 child = add_child(1, "twl4030_pwrbutton",
709 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
710 if (IS_ERR(child))
711 return PTR_ERR(child);
712 }
713
714 if (twl_has_codec() && pdata->codec) {
715 child = add_child(1, "twl4030_codec",
716 pdata->codec, sizeof(*pdata->codec),
717 false, 0, 0);
718 if (IS_ERR(child))
719 return PTR_ERR(child);
720 }
721
722 /* twl4030 regulators */
723 if (twl_has_regulator() && twl_class_is_4030()) {
724 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
725 if (IS_ERR(child))
726 return PTR_ERR(child);
727
728 child = add_regulator(TWL4030_REG_VIO, pdata->vio);
729 if (IS_ERR(child))
730 return PTR_ERR(child);
731
732 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1);
733 if (IS_ERR(child))
734 return PTR_ERR(child);
735
736 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2);
737 if (IS_ERR(child))
738 return PTR_ERR(child);
739
740 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
741 if (IS_ERR(child))
742 return PTR_ERR(child);
743
744 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
745 if (IS_ERR(child))
746 return PTR_ERR(child);
747
748 child = add_regulator((features & TWL4030_VAUX2)
749 ? TWL4030_REG_VAUX2_4030
750 : TWL4030_REG_VAUX2,
751 pdata->vaux2);
752 if (IS_ERR(child))
753 return PTR_ERR(child);
754
755 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1);
756 if (IS_ERR(child))
757 return PTR_ERR(child);
758
759 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2);
760 if (IS_ERR(child))
761 return PTR_ERR(child);
762
763 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig);
764 if (IS_ERR(child))
765 return PTR_ERR(child);
766 }
767
768 /* maybe add LDOs that are omitted on cost-reduced parts */
769 if (twl_has_regulator() && !(features & TPS_SUBSET)
770 && twl_class_is_4030()) {
771 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
772 if (IS_ERR(child))
773 return PTR_ERR(child);
774
775 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
776 if (IS_ERR(child))
777 return PTR_ERR(child);
778
779 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
780 if (IS_ERR(child))
781 return PTR_ERR(child);
782
783 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
784 if (IS_ERR(child))
785 return PTR_ERR(child);
786
787 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
788 if (IS_ERR(child))
789 return PTR_ERR(child);
790
791 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
792 if (IS_ERR(child))
793 return PTR_ERR(child);
794 }
795
796 /* twl6030 regulators */
797 if (twl_has_regulator() && twl_class_is_6030()) {
798 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc);
799 if (IS_ERR(child))
800 return PTR_ERR(child);
801
802 child = add_regulator(TWL6030_REG_VPP, pdata->vpp);
803 if (IS_ERR(child))
804 return PTR_ERR(child);
805
806 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim);
807 if (IS_ERR(child))
808 return PTR_ERR(child);
809
810 child = add_regulator(TWL6030_REG_VANA, pdata->vana);
811 if (IS_ERR(child))
812 return PTR_ERR(child);
813
814 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio);
815 if (IS_ERR(child))
816 return PTR_ERR(child);
817
818 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac);
819 if (IS_ERR(child))
820 return PTR_ERR(child);
821
822 child = add_regulator(TWL6030_REG_VUSB, pdata->vusb);
823 if (IS_ERR(child))
824 return PTR_ERR(child);
825
826 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1);
827 if (IS_ERR(child))
828 return PTR_ERR(child);
829
830 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2);
831 if (IS_ERR(child))
832 return PTR_ERR(child);
833
834 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3);
835 if (IS_ERR(child))
836 return PTR_ERR(child);
837 }
838
839 return 0;
840}
841
842/*----------------------------------------------------------------------*/
843
844/*
845 * These three functions initialize the on-chip clock framework,
846 * letting it generate the right frequencies for USB, MADC, and
847 * other purposes.
848 */
849static inline int __init protect_pm_master(void)
850{
851 int e = 0;
852
853 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_LOCK,
854 R_PROTECT_KEY);
855 return e;
856}
857
858static inline int __init unprotect_pm_master(void)
859{
860 int e = 0;
861
862 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK1,
863 R_PROTECT_KEY);
864 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK2,
865 R_PROTECT_KEY);
866 return e;
867}
868
869static void clocks_init(struct device *dev,
870 struct twl4030_clock_init_data *clock)
871{
872 int e = 0;
873 struct clk *osc;
874 u32 rate;
875 u8 ctrl = HFCLK_FREQ_26_MHZ;
876
877#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
878 if (cpu_is_omap2430())
879 osc = clk_get(dev, "osc_ck");
880 else
881 osc = clk_get(dev, "osc_sys_ck");
882
883 if (IS_ERR(osc)) {
884 printk(KERN_WARNING "Skipping twl internal clock init and "
885 "using bootloader value (unknown osc rate)\n");
886 return;
887 }
888
889 rate = clk_get_rate(osc);
890 clk_put(osc);
891
892#else
893 /* REVISIT for non-OMAP systems, pass the clock rate from
894 * board init code, using platform_data.
895 */
896 osc = ERR_PTR(-EIO);
897
898 printk(KERN_WARNING "Skipping twl internal clock init and "
899 "using bootloader value (unknown osc rate)\n");
900
901 return;
902#endif
903
904 switch (rate) {
905 case 19200000:
906 ctrl = HFCLK_FREQ_19p2_MHZ;
907 break;
908 case 26000000:
909 ctrl = HFCLK_FREQ_26_MHZ;
910 break;
911 case 38400000:
912 ctrl = HFCLK_FREQ_38p4_MHZ;
913 break;
914 }
915
916 ctrl |= HIGH_PERF_SQ;
917 if (clock && clock->ck32k_lowpwr_enable)
918 ctrl |= CK32K_LOWPWR_EN;
919
920 e |= unprotect_pm_master();
921 /* effect->MADC+USB ck en */
922 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
923 e |= protect_pm_master();
924
925 if (e < 0)
926 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
927}
928
929/*----------------------------------------------------------------------*/
930
931int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
932int twl4030_exit_irq(void);
933int twl4030_init_chip_irq(const char *chip);
934int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
935int twl6030_exit_irq(void);
936
937static int twl_remove(struct i2c_client *client)
938{
939 unsigned i;
940 int status;
941
942 if (twl_class_is_4030())
943 status = twl4030_exit_irq();
944 else
945 status = twl6030_exit_irq();
946
947 if (status < 0)
948 return status;
949
950 for (i = 0; i < TWL_NUM_SLAVES; i++) {
951 struct twl_client *twl = &twl_modules[i];
952
953 if (twl->client && twl->client != client)
954 i2c_unregister_device(twl->client);
955 twl_modules[i].client = NULL;
956 }
957 inuse = false;
958 return 0;
959}
960
961/* NOTE: this driver only handles a single twl4030/tps659x0 chip */
962static int __init
963twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
964{
965 int status;
966 unsigned i;
967 struct twl4030_platform_data *pdata = client->dev.platform_data;
968
969 if (!pdata) {
970 dev_dbg(&client->dev, "no platform data?\n");
971 return -EINVAL;
972 }
973
974 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
975 dev_dbg(&client->dev, "can't talk I2C?\n");
976 return -EIO;
977 }
978
979 if (inuse) {
980 dev_dbg(&client->dev, "driver is already in use\n");
981 return -EBUSY;
982 }
983
984 for (i = 0; i < TWL_NUM_SLAVES; i++) {
985 struct twl_client *twl = &twl_modules[i];
986
987 twl->address = client->addr + i;
988 if (i == 0)
989 twl->client = client;
990 else {
991 twl->client = i2c_new_dummy(client->adapter,
992 twl->address);
993 if (!twl->client) {
994 dev_err(&client->dev,
995 "can't attach client %d\n", i);
996 status = -ENOMEM;
997 goto fail;
998 }
999 }
1000 mutex_init(&twl->xfer_lock);
1001 }
1002 inuse = true;
1003 if ((id->driver_data) & TWL6030_CLASS) {
1004 twl_id = TWL6030_CLASS_ID;
1005 twl_map = &twl6030_map[0];
1006 } else {
1007 twl_id = TWL4030_CLASS_ID;
1008 twl_map = &twl4030_map[0];
1009 }
1010
1011 /* setup clock framework */
1012 clocks_init(&client->dev, pdata->clock);
1013
1014 /* load power event scripts */
1015 if (twl_has_power() && pdata->power)
1016 twl4030_power_init(pdata->power);
1017
1018 /* Maybe init the T2 Interrupt subsystem */
1019 if (client->irq
1020 && pdata->irq_base
1021 && pdata->irq_end > pdata->irq_base) {
1022 if (twl_class_is_4030()) {
1023 twl4030_init_chip_irq(id->name);
1024 status = twl4030_init_irq(client->irq, pdata->irq_base,
1025 pdata->irq_end);
1026 } else {
1027 status = twl6030_init_irq(client->irq, pdata->irq_base,
1028 pdata->irq_end);
1029 }
1030
1031 if (status < 0)
1032 goto fail;
1033 }
1034
1035 status = add_children(pdata, id->driver_data);
1036fail:
1037 if (status < 0)
1038 twl_remove(client);
1039 return status;
1040}
1041
1042static const struct i2c_device_id twl_ids[] = {
1043 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
1044 { "twl5030", 0 }, /* T2 updated */
1045 { "twl5031", TWL5031 }, /* TWL5030 updated */
1046 { "tps65950", 0 }, /* catalog version of twl5030 */
1047 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
1048 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
1049 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
1050 { /* end of list */ },
1051};
1052MODULE_DEVICE_TABLE(i2c, twl_ids);
1053
1054/* One Client Driver , 4 Clients */
1055static struct i2c_driver twl_driver = {
1056 .driver.name = DRIVER_NAME,
1057 .id_table = twl_ids,
1058 .probe = twl_probe,
1059 .remove = twl_remove,
1060};
1061
1062static int __init twl_init(void)
1063{
1064 return i2c_add_driver(&twl_driver);
1065}
1066subsys_initcall(twl_init);
1067
1068static void __exit twl_exit(void)
1069{
1070 i2c_del_driver(&twl_driver);
1071}
1072module_exit(twl_exit);
1073
1074MODULE_AUTHOR("Texas Instruments, Inc.");
1075MODULE_DESCRIPTION("I2C Core interface for TWL");
1076MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-06-01 00:25:37 -0400