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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 | ||
a313d758 | 41 | #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) |
b29c06ae SO |
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 | ||
80e45b1e TK |
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 | |
a603a7fa DB |
110 | |
111 | /* Triton Core internal information (BEGIN) */ | |
112 | ||
113 | /* Last - for index max*/ | |
114 | #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG | |
115 | ||
116 | #define TWL4030_NUM_SLAVES 4 | |
117 | ||
118 | ||
119 | /* Base Address defns for twl4030_map[] */ | |
120 | ||
121 | /* subchip/slave 0 - USB ID */ | |
122 | #define TWL4030_BASEADD_USB 0x0000 | |
123 | ||
124 | /* subchip/slave 1 - AUD ID */ | |
125 | #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 | |
126 | #define TWL4030_BASEADD_GPIO 0x0098 | |
127 | #define TWL4030_BASEADD_INTBR 0x0085 | |
128 | #define TWL4030_BASEADD_PIH 0x0080 | |
129 | #define TWL4030_BASEADD_TEST 0x004C | |
130 | ||
131 | /* subchip/slave 2 - AUX ID */ | |
132 | #define TWL4030_BASEADD_INTERRUPTS 0x00B9 | |
133 | #define TWL4030_BASEADD_LED 0x00EE | |
134 | #define TWL4030_BASEADD_MADC 0x0000 | |
135 | #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 | |
136 | #define TWL4030_BASEADD_PRECHARGE 0x00AA | |
137 | #define TWL4030_BASEADD_PWM0 0x00F8 | |
138 | #define TWL4030_BASEADD_PWM1 0x00FB | |
139 | #define TWL4030_BASEADD_PWMA 0x00EF | |
140 | #define TWL4030_BASEADD_PWMB 0x00F1 | |
141 | #define TWL4030_BASEADD_KEYPAD 0x00D2 | |
142 | ||
143 | /* subchip/slave 3 - POWER ID */ | |
144 | #define TWL4030_BASEADD_BACKUP 0x0014 | |
145 | #define TWL4030_BASEADD_INT 0x002E | |
146 | #define TWL4030_BASEADD_PM_MASTER 0x0036 | |
147 | #define TWL4030_BASEADD_PM_RECEIVER 0x005B | |
148 | #define TWL4030_BASEADD_RTC 0x001C | |
149 | #define TWL4030_BASEADD_SECURED_REG 0x0000 | |
150 | ||
151 | /* Triton Core internal information (END) */ | |
152 | ||
153 | ||
154 | /* Few power values */ | |
155 | #define R_CFG_BOOT 0x05 | |
156 | #define R_PROTECT_KEY 0x0E | |
157 | ||
158 | /* access control values for R_PROTECT_KEY */ | |
159 | #define KEY_UNLOCK1 0xce | |
160 | #define KEY_UNLOCK2 0xec | |
161 | #define KEY_LOCK 0x00 | |
162 | ||
163 | /* some fields in R_CFG_BOOT */ | |
164 | #define HFCLK_FREQ_19p2_MHZ (1 << 0) | |
165 | #define HFCLK_FREQ_26_MHZ (2 << 0) | |
166 | #define HFCLK_FREQ_38p4_MHZ (3 << 0) | |
167 | #define HIGH_PERF_SQ (1 << 3) | |
168 | ||
169 | ||
dad759ff DB |
170 | /* chip-specific feature flags, for i2c_device_id.driver_data */ |
171 | #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ | |
172 | #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ | |
173 | ||
a603a7fa DB |
174 | /*----------------------------------------------------------------------*/ |
175 | ||
a603a7fa DB |
176 | /* is driver active, bound to a chip? */ |
177 | static bool inuse; | |
178 | ||
179 | /* Structure for each TWL4030 Slave */ | |
180 | struct twl4030_client { | |
181 | struct i2c_client *client; | |
182 | u8 address; | |
183 | ||
184 | /* max numb of i2c_msg required is for read =2 */ | |
185 | struct i2c_msg xfer_msg[2]; | |
186 | ||
187 | /* To lock access to xfer_msg */ | |
188 | struct mutex xfer_lock; | |
189 | }; | |
190 | ||
191 | static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES]; | |
192 | ||
193 | ||
194 | /* mapping the module id to slave id and base address */ | |
195 | struct twl4030mapping { | |
196 | unsigned char sid; /* Slave ID */ | |
197 | unsigned char base; /* base address */ | |
198 | }; | |
199 | ||
200 | static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { | |
201 | /* | |
202 | * NOTE: don't change this table without updating the | |
203 | * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_* | |
204 | * so they continue to match the order in this table. | |
205 | */ | |
206 | ||
207 | { 0, TWL4030_BASEADD_USB }, | |
208 | ||
209 | { 1, TWL4030_BASEADD_AUDIO_VOICE }, | |
210 | { 1, TWL4030_BASEADD_GPIO }, | |
211 | { 1, TWL4030_BASEADD_INTBR }, | |
212 | { 1, TWL4030_BASEADD_PIH }, | |
213 | { 1, TWL4030_BASEADD_TEST }, | |
214 | ||
215 | { 2, TWL4030_BASEADD_KEYPAD }, | |
216 | { 2, TWL4030_BASEADD_MADC }, | |
217 | { 2, TWL4030_BASEADD_INTERRUPTS }, | |
218 | { 2, TWL4030_BASEADD_LED }, | |
219 | { 2, TWL4030_BASEADD_MAIN_CHARGE }, | |
220 | { 2, TWL4030_BASEADD_PRECHARGE }, | |
221 | { 2, TWL4030_BASEADD_PWM0 }, | |
222 | { 2, TWL4030_BASEADD_PWM1 }, | |
223 | { 2, TWL4030_BASEADD_PWMA }, | |
224 | { 2, TWL4030_BASEADD_PWMB }, | |
225 | ||
226 | { 3, TWL4030_BASEADD_BACKUP }, | |
227 | { 3, TWL4030_BASEADD_INT }, | |
228 | { 3, TWL4030_BASEADD_PM_MASTER }, | |
229 | { 3, TWL4030_BASEADD_PM_RECEIVER }, | |
230 | { 3, TWL4030_BASEADD_RTC }, | |
231 | { 3, TWL4030_BASEADD_SECURED_REG }, | |
232 | }; | |
233 | ||
234 | /*----------------------------------------------------------------------*/ | |
235 | ||
a603a7fa DB |
236 | /* Exported Functions */ |
237 | ||
238 | /** | |
239 | * twl4030_i2c_write - Writes a n bit register in TWL4030 | |
240 | * @mod_no: module number | |
241 | * @value: an array of num_bytes+1 containing data to write | |
242 | * @reg: register address (just offset will do) | |
243 | * @num_bytes: number of bytes to transfer | |
244 | * | |
245 | * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and | |
246 | * valid data starts at Offset 1. | |
247 | * | |
248 | * Returns the result of operation - 0 is success | |
249 | */ | |
3fba19ec | 250 | int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) |
a603a7fa DB |
251 | { |
252 | int ret; | |
253 | int sid; | |
254 | struct twl4030_client *twl; | |
255 | struct i2c_msg *msg; | |
256 | ||
257 | if (unlikely(mod_no > TWL4030_MODULE_LAST)) { | |
258 | pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); | |
259 | return -EPERM; | |
260 | } | |
261 | sid = twl4030_map[mod_no].sid; | |
262 | twl = &twl4030_modules[sid]; | |
263 | ||
264 | if (unlikely(!inuse)) { | |
265 | pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); | |
266 | return -EPERM; | |
267 | } | |
268 | mutex_lock(&twl->xfer_lock); | |
269 | /* | |
270 | * [MSG1]: fill the register address data | |
271 | * fill the data Tx buffer | |
272 | */ | |
273 | msg = &twl->xfer_msg[0]; | |
274 | msg->addr = twl->address; | |
275 | msg->len = num_bytes + 1; | |
276 | msg->flags = 0; | |
277 | msg->buf = value; | |
278 | /* over write the first byte of buffer with the register address */ | |
279 | *value = twl4030_map[mod_no].base + reg; | |
280 | ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); | |
281 | mutex_unlock(&twl->xfer_lock); | |
282 | ||
283 | /* i2cTransfer returns num messages.translate it pls.. */ | |
284 | if (ret >= 0) | |
285 | ret = 0; | |
286 | return ret; | |
287 | } | |
288 | EXPORT_SYMBOL(twl4030_i2c_write); | |
289 | ||
290 | /** | |
291 | * twl4030_i2c_read - Reads a n bit register in TWL4030 | |
292 | * @mod_no: module number | |
293 | * @value: an array of num_bytes containing data to be read | |
294 | * @reg: register address (just offset will do) | |
295 | * @num_bytes: number of bytes to transfer | |
296 | * | |
297 | * Returns result of operation - num_bytes is success else failure. | |
298 | */ | |
3fba19ec | 299 | int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) |
a603a7fa DB |
300 | { |
301 | int ret; | |
302 | u8 val; | |
303 | int sid; | |
304 | struct twl4030_client *twl; | |
305 | struct i2c_msg *msg; | |
306 | ||
307 | if (unlikely(mod_no > TWL4030_MODULE_LAST)) { | |
308 | pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); | |
309 | return -EPERM; | |
310 | } | |
311 | sid = twl4030_map[mod_no].sid; | |
312 | twl = &twl4030_modules[sid]; | |
313 | ||
314 | if (unlikely(!inuse)) { | |
315 | pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); | |
316 | return -EPERM; | |
317 | } | |
318 | mutex_lock(&twl->xfer_lock); | |
319 | /* [MSG1] fill the register address data */ | |
320 | msg = &twl->xfer_msg[0]; | |
321 | msg->addr = twl->address; | |
322 | msg->len = 1; | |
323 | msg->flags = 0; /* Read the register value */ | |
324 | val = twl4030_map[mod_no].base + reg; | |
325 | msg->buf = &val; | |
326 | /* [MSG2] fill the data rx buffer */ | |
327 | msg = &twl->xfer_msg[1]; | |
328 | msg->addr = twl->address; | |
329 | msg->flags = I2C_M_RD; /* Read the register value */ | |
330 | msg->len = num_bytes; /* only n bytes */ | |
331 | msg->buf = value; | |
332 | ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); | |
333 | mutex_unlock(&twl->xfer_lock); | |
334 | ||
335 | /* i2cTransfer returns num messages.translate it pls.. */ | |
336 | if (ret >= 0) | |
337 | ret = 0; | |
338 | return ret; | |
339 | } | |
340 | EXPORT_SYMBOL(twl4030_i2c_read); | |
341 | ||
342 | /** | |
343 | * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030 | |
344 | * @mod_no: module number | |
345 | * @value: the value to be written 8 bit | |
346 | * @reg: register address (just offset will do) | |
347 | * | |
348 | * Returns result of operation - 0 is success | |
349 | */ | |
350 | int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg) | |
351 | { | |
352 | ||
353 | /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ | |
354 | u8 temp_buffer[2] = { 0 }; | |
355 | /* offset 1 contains the data */ | |
356 | temp_buffer[1] = value; | |
357 | return twl4030_i2c_write(mod_no, temp_buffer, reg, 1); | |
358 | } | |
359 | EXPORT_SYMBOL(twl4030_i2c_write_u8); | |
360 | ||
361 | /** | |
362 | * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030 | |
363 | * @mod_no: module number | |
364 | * @value: the value read 8 bit | |
365 | * @reg: register address (just offset will do) | |
366 | * | |
367 | * Returns result of operation - 0 is success | |
368 | */ | |
369 | int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) | |
370 | { | |
371 | return twl4030_i2c_read(mod_no, value, reg, 1); | |
372 | } | |
373 | EXPORT_SYMBOL(twl4030_i2c_read_u8); | |
374 | ||
375 | /*----------------------------------------------------------------------*/ | |
376 | ||
dad759ff DB |
377 | static struct device * |
378 | add_numbered_child(unsigned chip, const char *name, int num, | |
5725d66b DB |
379 | void *pdata, unsigned pdata_len, |
380 | bool can_wakeup, int irq0, int irq1) | |
a603a7fa | 381 | { |
5725d66b DB |
382 | struct platform_device *pdev; |
383 | struct twl4030_client *twl = &twl4030_modules[chip]; | |
384 | int status; | |
385 | ||
dad759ff | 386 | pdev = platform_device_alloc(name, num); |
5725d66b DB |
387 | if (!pdev) { |
388 | dev_dbg(&twl->client->dev, "can't alloc dev\n"); | |
389 | status = -ENOMEM; | |
390 | goto err; | |
391 | } | |
a603a7fa | 392 | |
5725d66b DB |
393 | device_init_wakeup(&pdev->dev, can_wakeup); |
394 | pdev->dev.parent = &twl->client->dev; | |
a603a7fa | 395 | |
5725d66b DB |
396 | if (pdata) { |
397 | status = platform_device_add_data(pdev, pdata, pdata_len); | |
398 | if (status < 0) { | |
399 | dev_dbg(&pdev->dev, "can't add platform_data\n"); | |
a603a7fa DB |
400 | goto err; |
401 | } | |
5725d66b | 402 | } |
a603a7fa | 403 | |
5725d66b DB |
404 | if (irq0) { |
405 | struct resource r[2] = { | |
406 | { .start = irq0, .flags = IORESOURCE_IRQ, }, | |
407 | { .start = irq1, .flags = IORESOURCE_IRQ, }, | |
408 | }; | |
a603a7fa | 409 | |
5725d66b | 410 | status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); |
a603a7fa | 411 | if (status < 0) { |
5725d66b | 412 | dev_dbg(&pdev->dev, "can't add irqs\n"); |
a603a7fa DB |
413 | goto err; |
414 | } | |
415 | } | |
416 | ||
5725d66b | 417 | status = platform_device_add(pdev); |
a603a7fa | 418 | |
5725d66b DB |
419 | err: |
420 | if (status < 0) { | |
421 | platform_device_put(pdev); | |
422 | dev_err(&twl->client->dev, "can't add %s dev\n", name); | |
423 | return ERR_PTR(status); | |
424 | } | |
425 | return &pdev->dev; | |
426 | } | |
a603a7fa | 427 | |
dad759ff DB |
428 | static inline struct device *add_child(unsigned chip, const char *name, |
429 | void *pdata, unsigned pdata_len, | |
430 | bool can_wakeup, int irq0, int irq1) | |
431 | { | |
432 | return add_numbered_child(chip, name, -1, pdata, pdata_len, | |
433 | can_wakeup, irq0, irq1); | |
434 | } | |
435 | ||
436 | static struct device * | |
437 | add_regulator_linked(int num, struct regulator_init_data *pdata, | |
438 | struct regulator_consumer_supply *consumers, | |
439 | unsigned num_consumers) | |
440 | { | |
441 | /* regulator framework demands init_data ... */ | |
442 | if (!pdata) | |
443 | return NULL; | |
444 | ||
b73eac78 | 445 | if (consumers) { |
dad759ff DB |
446 | pdata->consumer_supplies = consumers; |
447 | pdata->num_consumer_supplies = num_consumers; | |
448 | } | |
449 | ||
450 | /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ | |
451 | return add_numbered_child(3, "twl4030_reg", num, | |
452 | pdata, sizeof(*pdata), false, 0, 0); | |
453 | } | |
454 | ||
455 | static struct device * | |
456 | add_regulator(int num, struct regulator_init_data *pdata) | |
457 | { | |
458 | return add_regulator_linked(num, pdata, NULL, 0); | |
459 | } | |
460 | ||
5725d66b DB |
461 | /* |
462 | * NOTE: We know the first 8 IRQs after pdata->base_irq are | |
463 | * for the PIH, and the next are for the PWR_INT SIH, since | |
464 | * that's how twl_init_irq() sets things up. | |
465 | */ | |
a603a7fa | 466 | |
dad759ff DB |
467 | static int |
468 | add_children(struct twl4030_platform_data *pdata, unsigned long features) | |
5725d66b DB |
469 | { |
470 | struct device *child; | |
dad759ff | 471 | struct device *usb_transceiver = NULL; |
a603a7fa | 472 | |
dad759ff | 473 | if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) { |
5725d66b DB |
474 | child = add_child(3, "twl4030_bci", |
475 | pdata->bci, sizeof(*pdata->bci), | |
476 | false, | |
477 | /* irq0 = CHG_PRES, irq1 = BCI */ | |
478 | pdata->irq_base + 8 + 1, pdata->irq_base + 2); | |
479 | if (IS_ERR(child)) | |
480 | return PTR_ERR(child); | |
481 | } | |
a603a7fa | 482 | |
5725d66b DB |
483 | if (twl_has_gpio() && pdata->gpio) { |
484 | child = add_child(1, "twl4030_gpio", | |
485 | pdata->gpio, sizeof(*pdata->gpio), | |
486 | false, pdata->irq_base + 0, 0); | |
487 | if (IS_ERR(child)) | |
488 | return PTR_ERR(child); | |
a603a7fa DB |
489 | } |
490 | ||
491 | if (twl_has_keypad() && pdata->keypad) { | |
5725d66b DB |
492 | child = add_child(2, "twl4030_keypad", |
493 | pdata->keypad, sizeof(*pdata->keypad), | |
494 | true, pdata->irq_base + 1, 0); | |
495 | if (IS_ERR(child)) | |
496 | return PTR_ERR(child); | |
a603a7fa DB |
497 | } |
498 | ||
499 | if (twl_has_madc() && pdata->madc) { | |
5725d66b DB |
500 | child = add_child(2, "twl4030_madc", |
501 | pdata->madc, sizeof(*pdata->madc), | |
502 | true, pdata->irq_base + 3, 0); | |
503 | if (IS_ERR(child)) | |
504 | return PTR_ERR(child); | |
a603a7fa DB |
505 | } |
506 | ||
507 | if (twl_has_rtc()) { | |
a603a7fa | 508 | /* |
5725d66b | 509 | * REVISIT platform_data here currently might expose the |
a603a7fa | 510 | * "msecure" line ... but for now we just expect board |
5725d66b | 511 | * setup to tell the chip "it's always ok to SET_TIME". |
a603a7fa DB |
512 | * Eventually, Linux might become more aware of such |
513 | * HW security concerns, and "least privilege". | |
514 | */ | |
5725d66b DB |
515 | child = add_child(3, "twl4030_rtc", |
516 | NULL, 0, | |
517 | true, pdata->irq_base + 8 + 3, 0); | |
518 | if (IS_ERR(child)) | |
519 | return PTR_ERR(child); | |
a603a7fa DB |
520 | } |
521 | ||
522 | if (twl_has_usb() && pdata->usb) { | |
5725d66b DB |
523 | child = add_child(0, "twl4030_usb", |
524 | pdata->usb, sizeof(*pdata->usb), | |
525 | true, | |
526 | /* irq0 = USB_PRES, irq1 = USB */ | |
527 | pdata->irq_base + 8 + 2, pdata->irq_base + 4); | |
528 | if (IS_ERR(child)) | |
529 | return PTR_ERR(child); | |
dad759ff DB |
530 | |
531 | /* we need to connect regulators to this transceiver */ | |
532 | usb_transceiver = child; | |
533 | } | |
534 | ||
80e45b1e TK |
535 | if (twl_has_watchdog()) { |
536 | child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); | |
537 | if (IS_ERR(child)) | |
538 | return PTR_ERR(child); | |
539 | } | |
540 | ||
dad759ff DB |
541 | if (twl_has_regulator()) { |
542 | /* | |
543 | child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); | |
544 | if (IS_ERR(child)) | |
545 | return PTR_ERR(child); | |
546 | */ | |
547 | ||
548 | child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); | |
549 | if (IS_ERR(child)) | |
550 | return PTR_ERR(child); | |
551 | ||
552 | child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); | |
553 | if (IS_ERR(child)) | |
554 | return PTR_ERR(child); | |
555 | ||
556 | child = add_regulator((features & TWL4030_VAUX2) | |
557 | ? TWL4030_REG_VAUX2_4030 | |
558 | : TWL4030_REG_VAUX2, | |
559 | pdata->vaux2); | |
560 | if (IS_ERR(child)) | |
561 | return PTR_ERR(child); | |
562 | } | |
563 | ||
564 | if (twl_has_regulator() && usb_transceiver) { | |
565 | static struct regulator_consumer_supply usb1v5 = { | |
566 | .supply = "usb1v5", | |
567 | }; | |
568 | static struct regulator_consumer_supply usb1v8 = { | |
569 | .supply = "usb1v8", | |
570 | }; | |
571 | static struct regulator_consumer_supply usb3v1 = { | |
572 | .supply = "usb3v1", | |
573 | }; | |
dad759ff DB |
574 | |
575 | /* this is a template that gets copied */ | |
576 | struct regulator_init_data usb_fixed = { | |
577 | .constraints.valid_modes_mask = | |
578 | REGULATOR_MODE_NORMAL | |
579 | | REGULATOR_MODE_STANDBY, | |
580 | .constraints.valid_ops_mask = | |
581 | REGULATOR_CHANGE_MODE | |
582 | | REGULATOR_CHANGE_STATUS, | |
583 | }; | |
584 | ||
585 | usb1v5.dev = usb_transceiver; | |
586 | usb1v8.dev = usb_transceiver; | |
587 | usb3v1.dev = usb_transceiver; | |
dad759ff DB |
588 | |
589 | child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed, | |
590 | &usb1v5, 1); | |
591 | if (IS_ERR(child)) | |
592 | return PTR_ERR(child); | |
593 | ||
594 | child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed, | |
595 | &usb1v8, 1); | |
596 | if (IS_ERR(child)) | |
597 | return PTR_ERR(child); | |
598 | ||
599 | child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed, | |
600 | &usb3v1, 1); | |
601 | if (IS_ERR(child)) | |
602 | return PTR_ERR(child); | |
dad759ff DB |
603 | } |
604 | ||
605 | /* maybe add LDOs that are omitted on cost-reduced parts */ | |
606 | if (twl_has_regulator() && !(features & TPS_SUBSET)) { | |
dad759ff DB |
607 | child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); |
608 | if (IS_ERR(child)) | |
609 | return PTR_ERR(child); | |
dad759ff DB |
610 | |
611 | child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); | |
612 | if (IS_ERR(child)) | |
613 | return PTR_ERR(child); | |
614 | ||
615 | child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); | |
616 | if (IS_ERR(child)) | |
617 | return PTR_ERR(child); | |
618 | ||
619 | child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); | |
620 | if (IS_ERR(child)) | |
621 | return PTR_ERR(child); | |
622 | ||
623 | child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); | |
624 | if (IS_ERR(child)) | |
625 | return PTR_ERR(child); | |
626 | ||
627 | child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); | |
628 | if (IS_ERR(child)) | |
629 | return PTR_ERR(child); | |
a603a7fa DB |
630 | } |
631 | ||
5725d66b | 632 | return 0; |
a603a7fa DB |
633 | } |
634 | ||
635 | /*----------------------------------------------------------------------*/ | |
636 | ||
637 | /* | |
638 | * These three functions initialize the on-chip clock framework, | |
639 | * letting it generate the right frequencies for USB, MADC, and | |
640 | * other purposes. | |
641 | */ | |
642 | static inline int __init protect_pm_master(void) | |
643 | { | |
644 | int e = 0; | |
645 | ||
646 | e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK, | |
647 | R_PROTECT_KEY); | |
648 | return e; | |
649 | } | |
650 | ||
651 | static inline int __init unprotect_pm_master(void) | |
652 | { | |
653 | int e = 0; | |
654 | ||
655 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1, | |
656 | R_PROTECT_KEY); | |
657 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2, | |
658 | R_PROTECT_KEY); | |
659 | return e; | |
660 | } | |
661 | ||
04ffa131 | 662 | static void clocks_init(struct device *dev) |
a603a7fa DB |
663 | { |
664 | int e = 0; | |
665 | struct clk *osc; | |
666 | u32 rate; | |
667 | u8 ctrl = HFCLK_FREQ_26_MHZ; | |
668 | ||
669 | #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) | |
670 | if (cpu_is_omap2430()) | |
e6b50c8d | 671 | osc = clk_get(dev, "osc_ck"); |
a603a7fa | 672 | else |
e6b50c8d | 673 | osc = clk_get(dev, "osc_sys_ck"); |
6354ab5c | 674 | |
a603a7fa DB |
675 | if (IS_ERR(osc)) { |
676 | printk(KERN_WARNING "Skipping twl4030 internal clock init and " | |
677 | "using bootloader value (unknown osc rate)\n"); | |
678 | return; | |
679 | } | |
680 | ||
681 | rate = clk_get_rate(osc); | |
682 | clk_put(osc); | |
683 | ||
6354ab5c SO |
684 | #else |
685 | /* REVISIT for non-OMAP systems, pass the clock rate from | |
686 | * board init code, using platform_data. | |
687 | */ | |
688 | osc = ERR_PTR(-EIO); | |
689 | ||
690 | printk(KERN_WARNING "Skipping twl4030 internal clock init and " | |
691 | "using bootloader value (unknown osc rate)\n"); | |
692 | ||
693 | return; | |
694 | #endif | |
695 | ||
a603a7fa DB |
696 | switch (rate) { |
697 | case 19200000: | |
698 | ctrl = HFCLK_FREQ_19p2_MHZ; | |
699 | break; | |
700 | case 26000000: | |
701 | ctrl = HFCLK_FREQ_26_MHZ; | |
702 | break; | |
703 | case 38400000: | |
704 | ctrl = HFCLK_FREQ_38p4_MHZ; | |
705 | break; | |
706 | } | |
707 | ||
708 | ctrl |= HIGH_PERF_SQ; | |
709 | e |= unprotect_pm_master(); | |
710 | /* effect->MADC+USB ck en */ | |
711 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); | |
712 | e |= protect_pm_master(); | |
713 | ||
714 | if (e < 0) | |
715 | pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); | |
716 | } | |
717 | ||
718 | /*----------------------------------------------------------------------*/ | |
719 | ||
a30d46c0 DB |
720 | int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); |
721 | int twl_exit_irq(void); | |
a603a7fa DB |
722 | |
723 | static int twl4030_remove(struct i2c_client *client) | |
724 | { | |
725 | unsigned i; | |
a30d46c0 | 726 | int status; |
a603a7fa | 727 | |
a30d46c0 DB |
728 | status = twl_exit_irq(); |
729 | if (status < 0) | |
730 | return status; | |
a603a7fa DB |
731 | |
732 | for (i = 0; i < TWL4030_NUM_SLAVES; i++) { | |
733 | struct twl4030_client *twl = &twl4030_modules[i]; | |
734 | ||
735 | if (twl->client && twl->client != client) | |
736 | i2c_unregister_device(twl->client); | |
737 | twl4030_modules[i].client = NULL; | |
738 | } | |
739 | inuse = false; | |
740 | return 0; | |
741 | } | |
742 | ||
743 | /* NOTE: this driver only handles a single twl4030/tps659x0 chip */ | |
744 | static int | |
745 | twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
746 | { | |
747 | int status; | |
748 | unsigned i; | |
749 | struct twl4030_platform_data *pdata = client->dev.platform_data; | |
750 | ||
751 | if (!pdata) { | |
752 | dev_dbg(&client->dev, "no platform data?\n"); | |
753 | return -EINVAL; | |
754 | } | |
755 | ||
756 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { | |
757 | dev_dbg(&client->dev, "can't talk I2C?\n"); | |
758 | return -EIO; | |
759 | } | |
760 | ||
a30d46c0 | 761 | if (inuse) { |
a603a7fa DB |
762 | dev_dbg(&client->dev, "driver is already in use\n"); |
763 | return -EBUSY; | |
764 | } | |
765 | ||
766 | for (i = 0; i < TWL4030_NUM_SLAVES; i++) { | |
767 | struct twl4030_client *twl = &twl4030_modules[i]; | |
768 | ||
769 | twl->address = client->addr + i; | |
770 | if (i == 0) | |
771 | twl->client = client; | |
772 | else { | |
773 | twl->client = i2c_new_dummy(client->adapter, | |
774 | twl->address); | |
775 | if (!twl->client) { | |
776 | dev_err(&twl->client->dev, | |
777 | "can't attach client %d\n", i); | |
778 | status = -ENOMEM; | |
779 | goto fail; | |
780 | } | |
781 | strlcpy(twl->client->name, id->name, | |
782 | sizeof(twl->client->name)); | |
783 | } | |
784 | mutex_init(&twl->xfer_lock); | |
785 | } | |
786 | inuse = true; | |
787 | ||
788 | /* setup clock framework */ | |
e6b50c8d | 789 | clocks_init(&client->dev); |
a603a7fa DB |
790 | |
791 | /* Maybe init the T2 Interrupt subsystem */ | |
792 | if (client->irq | |
793 | && pdata->irq_base | |
794 | && pdata->irq_end > pdata->irq_base) { | |
a30d46c0 DB |
795 | status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end); |
796 | if (status < 0) | |
797 | goto fail; | |
a603a7fa DB |
798 | } |
799 | ||
dad759ff | 800 | status = add_children(pdata, id->driver_data); |
a603a7fa DB |
801 | fail: |
802 | if (status < 0) | |
803 | twl4030_remove(client); | |
804 | return status; | |
805 | } | |
806 | ||
807 | static const struct i2c_device_id twl4030_ids[] = { | |
dad759ff DB |
808 | { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ |
809 | { "twl5030", 0 }, /* T2 updated */ | |
810 | { "tps65950", 0 }, /* catalog version of twl5030 */ | |
811 | { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ | |
812 | { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ | |
a603a7fa DB |
813 | { /* end of list */ }, |
814 | }; | |
815 | MODULE_DEVICE_TABLE(i2c, twl4030_ids); | |
816 | ||
817 | /* One Client Driver , 4 Clients */ | |
818 | static struct i2c_driver twl4030_driver = { | |
819 | .driver.name = DRIVER_NAME, | |
820 | .id_table = twl4030_ids, | |
821 | .probe = twl4030_probe, | |
822 | .remove = twl4030_remove, | |
823 | }; | |
824 | ||
825 | static int __init twl4030_init(void) | |
826 | { | |
827 | return i2c_add_driver(&twl4030_driver); | |
828 | } | |
829 | subsys_initcall(twl4030_init); | |
830 | ||
831 | static void __exit twl4030_exit(void) | |
832 | { | |
833 | i2c_del_driver(&twl4030_driver); | |
834 | } | |
835 | module_exit(twl4030_exit); | |
836 | ||
837 | MODULE_AUTHOR("Texas Instruments, Inc."); | |
838 | MODULE_DESCRIPTION("I2C Core interface for TWL4030"); | |
839 | MODULE_LICENSE("GPL"); |