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a603a7fa DB |
1 | /* |
2 | * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices | |
3 | * | |
4 | * Copyright (C) 2005-2006 Texas Instruments, Inc. | |
5 | * | |
6 | * Modifications to defer interrupt handling to a kernel thread: | |
7 | * Copyright (C) 2006 MontaVista Software, Inc. | |
8 | * | |
9 | * Based on tlv320aic23.c: | |
10 | * Copyright (c) by Kai Svahn <kai.svahn@nokia.com> | |
11 | * | |
12 | * Code cleanup and modifications to IRQ handler. | |
13 | * by syed khasim <x0khasim@ti.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2 of the License, or | |
18 | * (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
28 | */ | |
29 | ||
a603a7fa DB |
30 | #include <linux/init.h> |
31 | #include <linux/mutex.h> | |
a603a7fa DB |
32 | #include <linux/platform_device.h> |
33 | #include <linux/clk.h> | |
a30d46c0 | 34 | #include <linux/err.h> |
a603a7fa | 35 | |
dad759ff DB |
36 | #include <linux/regulator/machine.h> |
37 | ||
a603a7fa DB |
38 | #include <linux/i2c.h> |
39 | #include <linux/i2c/twl4030.h> | |
40 | ||
b29c06ae SO |
41 | #ifdef CONFIG_ARM |
42 | #include <mach/cpu.h> | |
43 | #endif | |
a603a7fa DB |
44 | |
45 | /* | |
46 | * The TWL4030 "Triton 2" is one of a family of a multi-function "Power | |
47 | * Management and System Companion Device" chips originally designed for | |
48 | * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, | |
49 | * often at around 3 Mbit/sec, including for interrupt handling. | |
50 | * | |
51 | * This driver core provides genirq support for the interrupts emitted, | |
52 | * by the various modules, and exports register access primitives. | |
53 | * | |
54 | * FIXME this driver currently requires use of the first interrupt line | |
55 | * (and associated registers). | |
56 | */ | |
57 | ||
58 | #define DRIVER_NAME "twl4030" | |
59 | ||
60 | #if defined(CONFIG_TWL4030_BCI_BATTERY) || \ | |
61 | defined(CONFIG_TWL4030_BCI_BATTERY_MODULE) | |
62 | #define twl_has_bci() true | |
63 | #else | |
64 | #define twl_has_bci() false | |
65 | #endif | |
66 | ||
67 | #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE) | |
68 | #define twl_has_keypad() true | |
69 | #else | |
70 | #define twl_has_keypad() false | |
71 | #endif | |
72 | ||
73 | #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE) | |
74 | #define twl_has_gpio() true | |
75 | #else | |
76 | #define twl_has_gpio() false | |
77 | #endif | |
78 | ||
dad759ff DB |
79 | #if defined(CONFIG_REGULATOR_TWL4030) \ |
80 | || defined(CONFIG_REGULATOR_TWL4030_MODULE) | |
81 | #define twl_has_regulator() true | |
82 | #else | |
83 | #define twl_has_regulator() false | |
84 | #endif | |
85 | ||
a603a7fa DB |
86 | #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE) |
87 | #define twl_has_madc() true | |
88 | #else | |
89 | #define twl_has_madc() 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 | ||
a603a7fa DB |
104 | |
105 | /* Triton Core internal information (BEGIN) */ | |
106 | ||
107 | /* Last - for index max*/ | |
108 | #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG | |
109 | ||
110 | #define TWL4030_NUM_SLAVES 4 | |
111 | ||
112 | ||
113 | /* Base Address defns for twl4030_map[] */ | |
114 | ||
115 | /* subchip/slave 0 - USB ID */ | |
116 | #define TWL4030_BASEADD_USB 0x0000 | |
117 | ||
118 | /* subchip/slave 1 - AUD ID */ | |
119 | #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 | |
120 | #define TWL4030_BASEADD_GPIO 0x0098 | |
121 | #define TWL4030_BASEADD_INTBR 0x0085 | |
122 | #define TWL4030_BASEADD_PIH 0x0080 | |
123 | #define TWL4030_BASEADD_TEST 0x004C | |
124 | ||
125 | /* subchip/slave 2 - AUX ID */ | |
126 | #define TWL4030_BASEADD_INTERRUPTS 0x00B9 | |
127 | #define TWL4030_BASEADD_LED 0x00EE | |
128 | #define TWL4030_BASEADD_MADC 0x0000 | |
129 | #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 | |
130 | #define TWL4030_BASEADD_PRECHARGE 0x00AA | |
131 | #define TWL4030_BASEADD_PWM0 0x00F8 | |
132 | #define TWL4030_BASEADD_PWM1 0x00FB | |
133 | #define TWL4030_BASEADD_PWMA 0x00EF | |
134 | #define TWL4030_BASEADD_PWMB 0x00F1 | |
135 | #define TWL4030_BASEADD_KEYPAD 0x00D2 | |
136 | ||
137 | /* subchip/slave 3 - POWER ID */ | |
138 | #define TWL4030_BASEADD_BACKUP 0x0014 | |
139 | #define TWL4030_BASEADD_INT 0x002E | |
140 | #define TWL4030_BASEADD_PM_MASTER 0x0036 | |
141 | #define TWL4030_BASEADD_PM_RECEIVER 0x005B | |
142 | #define TWL4030_BASEADD_RTC 0x001C | |
143 | #define TWL4030_BASEADD_SECURED_REG 0x0000 | |
144 | ||
145 | /* Triton Core internal information (END) */ | |
146 | ||
147 | ||
148 | /* Few power values */ | |
149 | #define R_CFG_BOOT 0x05 | |
150 | #define R_PROTECT_KEY 0x0E | |
151 | ||
152 | /* access control values for R_PROTECT_KEY */ | |
153 | #define KEY_UNLOCK1 0xce | |
154 | #define KEY_UNLOCK2 0xec | |
155 | #define KEY_LOCK 0x00 | |
156 | ||
157 | /* some fields in R_CFG_BOOT */ | |
158 | #define HFCLK_FREQ_19p2_MHZ (1 << 0) | |
159 | #define HFCLK_FREQ_26_MHZ (2 << 0) | |
160 | #define HFCLK_FREQ_38p4_MHZ (3 << 0) | |
161 | #define HIGH_PERF_SQ (1 << 3) | |
162 | ||
163 | ||
dad759ff DB |
164 | /* chip-specific feature flags, for i2c_device_id.driver_data */ |
165 | #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ | |
166 | #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ | |
167 | ||
a603a7fa DB |
168 | /*----------------------------------------------------------------------*/ |
169 | ||
a603a7fa DB |
170 | /* is driver active, bound to a chip? */ |
171 | static bool inuse; | |
172 | ||
173 | /* Structure for each TWL4030 Slave */ | |
174 | struct twl4030_client { | |
175 | struct i2c_client *client; | |
176 | u8 address; | |
177 | ||
178 | /* max numb of i2c_msg required is for read =2 */ | |
179 | struct i2c_msg xfer_msg[2]; | |
180 | ||
181 | /* To lock access to xfer_msg */ | |
182 | struct mutex xfer_lock; | |
183 | }; | |
184 | ||
185 | static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES]; | |
186 | ||
187 | ||
188 | /* mapping the module id to slave id and base address */ | |
189 | struct twl4030mapping { | |
190 | unsigned char sid; /* Slave ID */ | |
191 | unsigned char base; /* base address */ | |
192 | }; | |
193 | ||
194 | static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { | |
195 | /* | |
196 | * NOTE: don't change this table without updating the | |
197 | * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_* | |
198 | * so they continue to match the order in this table. | |
199 | */ | |
200 | ||
201 | { 0, TWL4030_BASEADD_USB }, | |
202 | ||
203 | { 1, TWL4030_BASEADD_AUDIO_VOICE }, | |
204 | { 1, TWL4030_BASEADD_GPIO }, | |
205 | { 1, TWL4030_BASEADD_INTBR }, | |
206 | { 1, TWL4030_BASEADD_PIH }, | |
207 | { 1, TWL4030_BASEADD_TEST }, | |
208 | ||
209 | { 2, TWL4030_BASEADD_KEYPAD }, | |
210 | { 2, TWL4030_BASEADD_MADC }, | |
211 | { 2, TWL4030_BASEADD_INTERRUPTS }, | |
212 | { 2, TWL4030_BASEADD_LED }, | |
213 | { 2, TWL4030_BASEADD_MAIN_CHARGE }, | |
214 | { 2, TWL4030_BASEADD_PRECHARGE }, | |
215 | { 2, TWL4030_BASEADD_PWM0 }, | |
216 | { 2, TWL4030_BASEADD_PWM1 }, | |
217 | { 2, TWL4030_BASEADD_PWMA }, | |
218 | { 2, TWL4030_BASEADD_PWMB }, | |
219 | ||
220 | { 3, TWL4030_BASEADD_BACKUP }, | |
221 | { 3, TWL4030_BASEADD_INT }, | |
222 | { 3, TWL4030_BASEADD_PM_MASTER }, | |
223 | { 3, TWL4030_BASEADD_PM_RECEIVER }, | |
224 | { 3, TWL4030_BASEADD_RTC }, | |
225 | { 3, TWL4030_BASEADD_SECURED_REG }, | |
226 | }; | |
227 | ||
228 | /*----------------------------------------------------------------------*/ | |
229 | ||
a603a7fa DB |
230 | /* Exported Functions */ |
231 | ||
232 | /** | |
233 | * twl4030_i2c_write - Writes a n bit register in TWL4030 | |
234 | * @mod_no: module number | |
235 | * @value: an array of num_bytes+1 containing data to write | |
236 | * @reg: register address (just offset will do) | |
237 | * @num_bytes: number of bytes to transfer | |
238 | * | |
239 | * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and | |
240 | * valid data starts at Offset 1. | |
241 | * | |
242 | * Returns the result of operation - 0 is success | |
243 | */ | |
3fba19ec | 244 | int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) |
a603a7fa DB |
245 | { |
246 | int ret; | |
247 | int sid; | |
248 | struct twl4030_client *twl; | |
249 | struct i2c_msg *msg; | |
250 | ||
251 | if (unlikely(mod_no > TWL4030_MODULE_LAST)) { | |
252 | pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); | |
253 | return -EPERM; | |
254 | } | |
255 | sid = twl4030_map[mod_no].sid; | |
256 | twl = &twl4030_modules[sid]; | |
257 | ||
258 | if (unlikely(!inuse)) { | |
259 | pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); | |
260 | return -EPERM; | |
261 | } | |
262 | mutex_lock(&twl->xfer_lock); | |
263 | /* | |
264 | * [MSG1]: fill the register address data | |
265 | * fill the data Tx buffer | |
266 | */ | |
267 | msg = &twl->xfer_msg[0]; | |
268 | msg->addr = twl->address; | |
269 | msg->len = num_bytes + 1; | |
270 | msg->flags = 0; | |
271 | msg->buf = value; | |
272 | /* over write the first byte of buffer with the register address */ | |
273 | *value = twl4030_map[mod_no].base + reg; | |
274 | ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); | |
275 | mutex_unlock(&twl->xfer_lock); | |
276 | ||
277 | /* i2cTransfer returns num messages.translate it pls.. */ | |
278 | if (ret >= 0) | |
279 | ret = 0; | |
280 | return ret; | |
281 | } | |
282 | EXPORT_SYMBOL(twl4030_i2c_write); | |
283 | ||
284 | /** | |
285 | * twl4030_i2c_read - Reads a n bit register in TWL4030 | |
286 | * @mod_no: module number | |
287 | * @value: an array of num_bytes containing data to be read | |
288 | * @reg: register address (just offset will do) | |
289 | * @num_bytes: number of bytes to transfer | |
290 | * | |
291 | * Returns result of operation - num_bytes is success else failure. | |
292 | */ | |
3fba19ec | 293 | int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) |
a603a7fa DB |
294 | { |
295 | int ret; | |
296 | u8 val; | |
297 | int sid; | |
298 | struct twl4030_client *twl; | |
299 | struct i2c_msg *msg; | |
300 | ||
301 | if (unlikely(mod_no > TWL4030_MODULE_LAST)) { | |
302 | pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); | |
303 | return -EPERM; | |
304 | } | |
305 | sid = twl4030_map[mod_no].sid; | |
306 | twl = &twl4030_modules[sid]; | |
307 | ||
308 | if (unlikely(!inuse)) { | |
309 | pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); | |
310 | return -EPERM; | |
311 | } | |
312 | mutex_lock(&twl->xfer_lock); | |
313 | /* [MSG1] fill the register address data */ | |
314 | msg = &twl->xfer_msg[0]; | |
315 | msg->addr = twl->address; | |
316 | msg->len = 1; | |
317 | msg->flags = 0; /* Read the register value */ | |
318 | val = twl4030_map[mod_no].base + reg; | |
319 | msg->buf = &val; | |
320 | /* [MSG2] fill the data rx buffer */ | |
321 | msg = &twl->xfer_msg[1]; | |
322 | msg->addr = twl->address; | |
323 | msg->flags = I2C_M_RD; /* Read the register value */ | |
324 | msg->len = num_bytes; /* only n bytes */ | |
325 | msg->buf = value; | |
326 | ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); | |
327 | mutex_unlock(&twl->xfer_lock); | |
328 | ||
329 | /* i2cTransfer returns num messages.translate it pls.. */ | |
330 | if (ret >= 0) | |
331 | ret = 0; | |
332 | return ret; | |
333 | } | |
334 | EXPORT_SYMBOL(twl4030_i2c_read); | |
335 | ||
336 | /** | |
337 | * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030 | |
338 | * @mod_no: module number | |
339 | * @value: the value to be written 8 bit | |
340 | * @reg: register address (just offset will do) | |
341 | * | |
342 | * Returns result of operation - 0 is success | |
343 | */ | |
344 | int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg) | |
345 | { | |
346 | ||
347 | /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ | |
348 | u8 temp_buffer[2] = { 0 }; | |
349 | /* offset 1 contains the data */ | |
350 | temp_buffer[1] = value; | |
351 | return twl4030_i2c_write(mod_no, temp_buffer, reg, 1); | |
352 | } | |
353 | EXPORT_SYMBOL(twl4030_i2c_write_u8); | |
354 | ||
355 | /** | |
356 | * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030 | |
357 | * @mod_no: module number | |
358 | * @value: the value read 8 bit | |
359 | * @reg: register address (just offset will do) | |
360 | * | |
361 | * Returns result of operation - 0 is success | |
362 | */ | |
363 | int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) | |
364 | { | |
365 | return twl4030_i2c_read(mod_no, value, reg, 1); | |
366 | } | |
367 | EXPORT_SYMBOL(twl4030_i2c_read_u8); | |
368 | ||
369 | /*----------------------------------------------------------------------*/ | |
370 | ||
dad759ff DB |
371 | static struct device * |
372 | add_numbered_child(unsigned chip, const char *name, int num, | |
5725d66b DB |
373 | void *pdata, unsigned pdata_len, |
374 | bool can_wakeup, int irq0, int irq1) | |
a603a7fa | 375 | { |
5725d66b DB |
376 | struct platform_device *pdev; |
377 | struct twl4030_client *twl = &twl4030_modules[chip]; | |
378 | int status; | |
379 | ||
dad759ff | 380 | pdev = platform_device_alloc(name, num); |
5725d66b DB |
381 | if (!pdev) { |
382 | dev_dbg(&twl->client->dev, "can't alloc dev\n"); | |
383 | status = -ENOMEM; | |
384 | goto err; | |
385 | } | |
a603a7fa | 386 | |
5725d66b DB |
387 | device_init_wakeup(&pdev->dev, can_wakeup); |
388 | pdev->dev.parent = &twl->client->dev; | |
a603a7fa | 389 | |
5725d66b DB |
390 | if (pdata) { |
391 | status = platform_device_add_data(pdev, pdata, pdata_len); | |
392 | if (status < 0) { | |
393 | dev_dbg(&pdev->dev, "can't add platform_data\n"); | |
a603a7fa DB |
394 | goto err; |
395 | } | |
5725d66b | 396 | } |
a603a7fa | 397 | |
5725d66b DB |
398 | if (irq0) { |
399 | struct resource r[2] = { | |
400 | { .start = irq0, .flags = IORESOURCE_IRQ, }, | |
401 | { .start = irq1, .flags = IORESOURCE_IRQ, }, | |
402 | }; | |
a603a7fa | 403 | |
5725d66b | 404 | status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); |
a603a7fa | 405 | if (status < 0) { |
5725d66b | 406 | dev_dbg(&pdev->dev, "can't add irqs\n"); |
a603a7fa DB |
407 | goto err; |
408 | } | |
409 | } | |
410 | ||
5725d66b | 411 | status = platform_device_add(pdev); |
a603a7fa | 412 | |
5725d66b DB |
413 | err: |
414 | if (status < 0) { | |
415 | platform_device_put(pdev); | |
416 | dev_err(&twl->client->dev, "can't add %s dev\n", name); | |
417 | return ERR_PTR(status); | |
418 | } | |
419 | return &pdev->dev; | |
420 | } | |
a603a7fa | 421 | |
dad759ff DB |
422 | static inline struct device *add_child(unsigned chip, const char *name, |
423 | void *pdata, unsigned pdata_len, | |
424 | bool can_wakeup, int irq0, int irq1) | |
425 | { | |
426 | return add_numbered_child(chip, name, -1, pdata, pdata_len, | |
427 | can_wakeup, irq0, irq1); | |
428 | } | |
429 | ||
430 | static struct device * | |
431 | add_regulator_linked(int num, struct regulator_init_data *pdata, | |
432 | struct regulator_consumer_supply *consumers, | |
433 | unsigned num_consumers) | |
434 | { | |
435 | /* regulator framework demands init_data ... */ | |
436 | if (!pdata) | |
437 | return NULL; | |
438 | ||
b73eac78 | 439 | if (consumers) { |
dad759ff DB |
440 | pdata->consumer_supplies = consumers; |
441 | pdata->num_consumer_supplies = num_consumers; | |
442 | } | |
443 | ||
444 | /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ | |
445 | return add_numbered_child(3, "twl4030_reg", num, | |
446 | pdata, sizeof(*pdata), false, 0, 0); | |
447 | } | |
448 | ||
449 | static struct device * | |
450 | add_regulator(int num, struct regulator_init_data *pdata) | |
451 | { | |
452 | return add_regulator_linked(num, pdata, NULL, 0); | |
453 | } | |
454 | ||
5725d66b DB |
455 | /* |
456 | * NOTE: We know the first 8 IRQs after pdata->base_irq are | |
457 | * for the PIH, and the next are for the PWR_INT SIH, since | |
458 | * that's how twl_init_irq() sets things up. | |
459 | */ | |
a603a7fa | 460 | |
dad759ff DB |
461 | static int |
462 | add_children(struct twl4030_platform_data *pdata, unsigned long features) | |
5725d66b DB |
463 | { |
464 | struct device *child; | |
dad759ff | 465 | struct device *usb_transceiver = NULL; |
a603a7fa | 466 | |
dad759ff | 467 | if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) { |
5725d66b DB |
468 | child = add_child(3, "twl4030_bci", |
469 | pdata->bci, sizeof(*pdata->bci), | |
470 | false, | |
471 | /* irq0 = CHG_PRES, irq1 = BCI */ | |
472 | pdata->irq_base + 8 + 1, pdata->irq_base + 2); | |
473 | if (IS_ERR(child)) | |
474 | return PTR_ERR(child); | |
475 | } | |
a603a7fa | 476 | |
5725d66b DB |
477 | if (twl_has_gpio() && pdata->gpio) { |
478 | child = add_child(1, "twl4030_gpio", | |
479 | pdata->gpio, sizeof(*pdata->gpio), | |
480 | false, pdata->irq_base + 0, 0); | |
481 | if (IS_ERR(child)) | |
482 | return PTR_ERR(child); | |
a603a7fa DB |
483 | } |
484 | ||
485 | if (twl_has_keypad() && pdata->keypad) { | |
5725d66b DB |
486 | child = add_child(2, "twl4030_keypad", |
487 | pdata->keypad, sizeof(*pdata->keypad), | |
488 | true, pdata->irq_base + 1, 0); | |
489 | if (IS_ERR(child)) | |
490 | return PTR_ERR(child); | |
a603a7fa DB |
491 | } |
492 | ||
493 | if (twl_has_madc() && pdata->madc) { | |
5725d66b DB |
494 | child = add_child(2, "twl4030_madc", |
495 | pdata->madc, sizeof(*pdata->madc), | |
496 | true, pdata->irq_base + 3, 0); | |
497 | if (IS_ERR(child)) | |
498 | return PTR_ERR(child); | |
a603a7fa DB |
499 | } |
500 | ||
501 | if (twl_has_rtc()) { | |
a603a7fa | 502 | /* |
5725d66b | 503 | * REVISIT platform_data here currently might expose the |
a603a7fa | 504 | * "msecure" line ... but for now we just expect board |
5725d66b | 505 | * setup to tell the chip "it's always ok to SET_TIME". |
a603a7fa DB |
506 | * Eventually, Linux might become more aware of such |
507 | * HW security concerns, and "least privilege". | |
508 | */ | |
5725d66b DB |
509 | child = add_child(3, "twl4030_rtc", |
510 | NULL, 0, | |
511 | true, pdata->irq_base + 8 + 3, 0); | |
512 | if (IS_ERR(child)) | |
513 | return PTR_ERR(child); | |
a603a7fa DB |
514 | } |
515 | ||
516 | if (twl_has_usb() && pdata->usb) { | |
5725d66b DB |
517 | child = add_child(0, "twl4030_usb", |
518 | pdata->usb, sizeof(*pdata->usb), | |
519 | true, | |
520 | /* irq0 = USB_PRES, irq1 = USB */ | |
521 | pdata->irq_base + 8 + 2, pdata->irq_base + 4); | |
522 | if (IS_ERR(child)) | |
523 | return PTR_ERR(child); | |
dad759ff DB |
524 | |
525 | /* we need to connect regulators to this transceiver */ | |
526 | usb_transceiver = child; | |
527 | } | |
528 | ||
529 | if (twl_has_regulator()) { | |
530 | /* | |
531 | child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); | |
532 | if (IS_ERR(child)) | |
533 | return PTR_ERR(child); | |
534 | */ | |
535 | ||
536 | child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); | |
537 | if (IS_ERR(child)) | |
538 | return PTR_ERR(child); | |
539 | ||
540 | child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); | |
541 | if (IS_ERR(child)) | |
542 | return PTR_ERR(child); | |
543 | ||
544 | child = add_regulator((features & TWL4030_VAUX2) | |
545 | ? TWL4030_REG_VAUX2_4030 | |
546 | : TWL4030_REG_VAUX2, | |
547 | pdata->vaux2); | |
548 | if (IS_ERR(child)) | |
549 | return PTR_ERR(child); | |
550 | } | |
551 | ||
552 | if (twl_has_regulator() && usb_transceiver) { | |
553 | static struct regulator_consumer_supply usb1v5 = { | |
554 | .supply = "usb1v5", | |
555 | }; | |
556 | static struct regulator_consumer_supply usb1v8 = { | |
557 | .supply = "usb1v8", | |
558 | }; | |
559 | static struct regulator_consumer_supply usb3v1 = { | |
560 | .supply = "usb3v1", | |
561 | }; | |
dad759ff DB |
562 | |
563 | /* this is a template that gets copied */ | |
564 | struct regulator_init_data usb_fixed = { | |
565 | .constraints.valid_modes_mask = | |
566 | REGULATOR_MODE_NORMAL | |
567 | | REGULATOR_MODE_STANDBY, | |
568 | .constraints.valid_ops_mask = | |
569 | REGULATOR_CHANGE_MODE | |
570 | | REGULATOR_CHANGE_STATUS, | |
571 | }; | |
572 | ||
573 | usb1v5.dev = usb_transceiver; | |
574 | usb1v8.dev = usb_transceiver; | |
575 | usb3v1.dev = usb_transceiver; | |
dad759ff DB |
576 | |
577 | child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed, | |
578 | &usb1v5, 1); | |
579 | if (IS_ERR(child)) | |
580 | return PTR_ERR(child); | |
581 | ||
582 | child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed, | |
583 | &usb1v8, 1); | |
584 | if (IS_ERR(child)) | |
585 | return PTR_ERR(child); | |
586 | ||
587 | child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed, | |
588 | &usb3v1, 1); | |
589 | if (IS_ERR(child)) | |
590 | return PTR_ERR(child); | |
dad759ff DB |
591 | } |
592 | ||
593 | /* maybe add LDOs that are omitted on cost-reduced parts */ | |
594 | if (twl_has_regulator() && !(features & TPS_SUBSET)) { | |
595 | /* | |
596 | child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); | |
597 | if (IS_ERR(child)) | |
598 | return PTR_ERR(child); | |
599 | */ | |
600 | ||
601 | child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); | |
602 | if (IS_ERR(child)) | |
603 | return PTR_ERR(child); | |
604 | ||
605 | child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); | |
606 | if (IS_ERR(child)) | |
607 | return PTR_ERR(child); | |
608 | ||
609 | child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); | |
610 | if (IS_ERR(child)) | |
611 | return PTR_ERR(child); | |
612 | ||
613 | child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); | |
614 | if (IS_ERR(child)) | |
615 | return PTR_ERR(child); | |
616 | ||
617 | child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); | |
618 | if (IS_ERR(child)) | |
619 | return PTR_ERR(child); | |
a603a7fa DB |
620 | } |
621 | ||
5725d66b | 622 | return 0; |
a603a7fa DB |
623 | } |
624 | ||
625 | /*----------------------------------------------------------------------*/ | |
626 | ||
627 | /* | |
628 | * These three functions initialize the on-chip clock framework, | |
629 | * letting it generate the right frequencies for USB, MADC, and | |
630 | * other purposes. | |
631 | */ | |
632 | static inline int __init protect_pm_master(void) | |
633 | { | |
634 | int e = 0; | |
635 | ||
636 | e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK, | |
637 | R_PROTECT_KEY); | |
638 | return e; | |
639 | } | |
640 | ||
641 | static inline int __init unprotect_pm_master(void) | |
642 | { | |
643 | int e = 0; | |
644 | ||
645 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1, | |
646 | R_PROTECT_KEY); | |
647 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2, | |
648 | R_PROTECT_KEY); | |
649 | return e; | |
650 | } | |
651 | ||
e6b50c8d | 652 | static void __init clocks_init(struct device *dev) |
a603a7fa DB |
653 | { |
654 | int e = 0; | |
655 | struct clk *osc; | |
656 | u32 rate; | |
657 | u8 ctrl = HFCLK_FREQ_26_MHZ; | |
658 | ||
659 | #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) | |
660 | if (cpu_is_omap2430()) | |
e6b50c8d | 661 | osc = clk_get(dev, "osc_ck"); |
a603a7fa | 662 | else |
e6b50c8d | 663 | osc = clk_get(dev, "osc_sys_ck"); |
6354ab5c | 664 | |
a603a7fa DB |
665 | if (IS_ERR(osc)) { |
666 | printk(KERN_WARNING "Skipping twl4030 internal clock init and " | |
667 | "using bootloader value (unknown osc rate)\n"); | |
668 | return; | |
669 | } | |
670 | ||
671 | rate = clk_get_rate(osc); | |
672 | clk_put(osc); | |
673 | ||
6354ab5c SO |
674 | #else |
675 | /* REVISIT for non-OMAP systems, pass the clock rate from | |
676 | * board init code, using platform_data. | |
677 | */ | |
678 | osc = ERR_PTR(-EIO); | |
679 | ||
680 | printk(KERN_WARNING "Skipping twl4030 internal clock init and " | |
681 | "using bootloader value (unknown osc rate)\n"); | |
682 | ||
683 | return; | |
684 | #endif | |
685 | ||
a603a7fa DB |
686 | switch (rate) { |
687 | case 19200000: | |
688 | ctrl = HFCLK_FREQ_19p2_MHZ; | |
689 | break; | |
690 | case 26000000: | |
691 | ctrl = HFCLK_FREQ_26_MHZ; | |
692 | break; | |
693 | case 38400000: | |
694 | ctrl = HFCLK_FREQ_38p4_MHZ; | |
695 | break; | |
696 | } | |
697 | ||
698 | ctrl |= HIGH_PERF_SQ; | |
699 | e |= unprotect_pm_master(); | |
700 | /* effect->MADC+USB ck en */ | |
701 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); | |
702 | e |= protect_pm_master(); | |
703 | ||
704 | if (e < 0) | |
705 | pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); | |
706 | } | |
707 | ||
708 | /*----------------------------------------------------------------------*/ | |
709 | ||
a30d46c0 DB |
710 | int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); |
711 | int twl_exit_irq(void); | |
a603a7fa DB |
712 | |
713 | static int twl4030_remove(struct i2c_client *client) | |
714 | { | |
715 | unsigned i; | |
a30d46c0 | 716 | int status; |
a603a7fa | 717 | |
a30d46c0 DB |
718 | status = twl_exit_irq(); |
719 | if (status < 0) | |
720 | return status; | |
a603a7fa DB |
721 | |
722 | for (i = 0; i < TWL4030_NUM_SLAVES; i++) { | |
723 | struct twl4030_client *twl = &twl4030_modules[i]; | |
724 | ||
725 | if (twl->client && twl->client != client) | |
726 | i2c_unregister_device(twl->client); | |
727 | twl4030_modules[i].client = NULL; | |
728 | } | |
729 | inuse = false; | |
730 | return 0; | |
731 | } | |
732 | ||
733 | /* NOTE: this driver only handles a single twl4030/tps659x0 chip */ | |
734 | static int | |
735 | twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
736 | { | |
737 | int status; | |
738 | unsigned i; | |
739 | struct twl4030_platform_data *pdata = client->dev.platform_data; | |
740 | ||
741 | if (!pdata) { | |
742 | dev_dbg(&client->dev, "no platform data?\n"); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
746 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { | |
747 | dev_dbg(&client->dev, "can't talk I2C?\n"); | |
748 | return -EIO; | |
749 | } | |
750 | ||
a30d46c0 | 751 | if (inuse) { |
a603a7fa DB |
752 | dev_dbg(&client->dev, "driver is already in use\n"); |
753 | return -EBUSY; | |
754 | } | |
755 | ||
756 | for (i = 0; i < TWL4030_NUM_SLAVES; i++) { | |
757 | struct twl4030_client *twl = &twl4030_modules[i]; | |
758 | ||
759 | twl->address = client->addr + i; | |
760 | if (i == 0) | |
761 | twl->client = client; | |
762 | else { | |
763 | twl->client = i2c_new_dummy(client->adapter, | |
764 | twl->address); | |
765 | if (!twl->client) { | |
766 | dev_err(&twl->client->dev, | |
767 | "can't attach client %d\n", i); | |
768 | status = -ENOMEM; | |
769 | goto fail; | |
770 | } | |
771 | strlcpy(twl->client->name, id->name, | |
772 | sizeof(twl->client->name)); | |
773 | } | |
774 | mutex_init(&twl->xfer_lock); | |
775 | } | |
776 | inuse = true; | |
777 | ||
778 | /* setup clock framework */ | |
e6b50c8d | 779 | clocks_init(&client->dev); |
a603a7fa DB |
780 | |
781 | /* Maybe init the T2 Interrupt subsystem */ | |
782 | if (client->irq | |
783 | && pdata->irq_base | |
784 | && pdata->irq_end > pdata->irq_base) { | |
a30d46c0 DB |
785 | status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end); |
786 | if (status < 0) | |
787 | goto fail; | |
a603a7fa DB |
788 | } |
789 | ||
dad759ff | 790 | status = add_children(pdata, id->driver_data); |
a603a7fa DB |
791 | fail: |
792 | if (status < 0) | |
793 | twl4030_remove(client); | |
794 | return status; | |
795 | } | |
796 | ||
797 | static const struct i2c_device_id twl4030_ids[] = { | |
dad759ff DB |
798 | { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ |
799 | { "twl5030", 0 }, /* T2 updated */ | |
800 | { "tps65950", 0 }, /* catalog version of twl5030 */ | |
801 | { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ | |
802 | { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ | |
a603a7fa DB |
803 | { /* end of list */ }, |
804 | }; | |
805 | MODULE_DEVICE_TABLE(i2c, twl4030_ids); | |
806 | ||
807 | /* One Client Driver , 4 Clients */ | |
808 | static struct i2c_driver twl4030_driver = { | |
809 | .driver.name = DRIVER_NAME, | |
810 | .id_table = twl4030_ids, | |
811 | .probe = twl4030_probe, | |
812 | .remove = twl4030_remove, | |
813 | }; | |
814 | ||
815 | static int __init twl4030_init(void) | |
816 | { | |
817 | return i2c_add_driver(&twl4030_driver); | |
818 | } | |
819 | subsys_initcall(twl4030_init); | |
820 | ||
821 | static void __exit twl4030_exit(void) | |
822 | { | |
823 | i2c_del_driver(&twl4030_driver); | |
824 | } | |
825 | module_exit(twl4030_exit); | |
826 | ||
827 | MODULE_AUTHOR("Texas Instruments, Inc."); | |
828 | MODULE_DESCRIPTION("I2C Core interface for TWL4030"); | |
829 | MODULE_LICENSE("GPL"); |