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0c4a59fe TL |
1 | #define DEBUG |
2 | /* | |
3 | * Copyright (C) 2004 Texas Instruments, Inc. | |
4 | * | |
5 | * Some parts based tps65010.c: | |
6 | * Copyright (C) 2004 Texas Instruments and | |
7 | * Copyright (C) 2004-2005 David Brownell | |
8 | * | |
9 | * Some parts based on tlv320aic24.c: | |
10 | * Copyright (C) by Kai Svahn <kai.svahn@nokia.com> | |
11 | * | |
12 | * Changes for interrupt handling and clean-up by | |
13 | * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com> | |
14 | * Cleanup and generalized support for voltage setting by | |
15 | * Juha Yrjola | |
16 | * Added support for controlling VCORE and regulator sleep states, | |
17 | * Amit Kucheria <amit.kucheria@nokia.com> | |
18 | * Copyright (C) 2005, 2006 Nokia Corporation | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
33 | */ | |
34 | ||
35 | #include <linux/module.h> | |
36 | #include <linux/i2c.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/mutex.h> | |
40 | #include <linux/workqueue.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/rtc.h> | |
43 | #include <linux/bcd.h> | |
44 | ||
45 | #include <asm/mach-types.h> | |
46 | #include <asm/mach/irq.h> | |
47 | ||
48 | #include <asm/arch/gpio.h> | |
49 | #include <asm/arch/menelaus.h> | |
50 | ||
51 | #define DRIVER_NAME "menelaus" | |
52 | ||
53 | #define pr_err(fmt, arg...) printk(KERN_ERR DRIVER_NAME ": ", ## arg); | |
54 | ||
55 | #define MENELAUS_I2C_ADDRESS 0x72 | |
56 | ||
57 | #define MENELAUS_REV 0x01 | |
58 | #define MENELAUS_VCORE_CTRL1 0x02 | |
59 | #define MENELAUS_VCORE_CTRL2 0x03 | |
60 | #define MENELAUS_VCORE_CTRL3 0x04 | |
61 | #define MENELAUS_VCORE_CTRL4 0x05 | |
62 | #define MENELAUS_VCORE_CTRL5 0x06 | |
63 | #define MENELAUS_DCDC_CTRL1 0x07 | |
64 | #define MENELAUS_DCDC_CTRL2 0x08 | |
65 | #define MENELAUS_DCDC_CTRL3 0x09 | |
66 | #define MENELAUS_LDO_CTRL1 0x0A | |
67 | #define MENELAUS_LDO_CTRL2 0x0B | |
68 | #define MENELAUS_LDO_CTRL3 0x0C | |
69 | #define MENELAUS_LDO_CTRL4 0x0D | |
70 | #define MENELAUS_LDO_CTRL5 0x0E | |
71 | #define MENELAUS_LDO_CTRL6 0x0F | |
72 | #define MENELAUS_LDO_CTRL7 0x10 | |
73 | #define MENELAUS_LDO_CTRL8 0x11 | |
74 | #define MENELAUS_SLEEP_CTRL1 0x12 | |
75 | #define MENELAUS_SLEEP_CTRL2 0x13 | |
76 | #define MENELAUS_DEVICE_OFF 0x14 | |
77 | #define MENELAUS_OSC_CTRL 0x15 | |
78 | #define MENELAUS_DETECT_CTRL 0x16 | |
79 | #define MENELAUS_INT_MASK1 0x17 | |
80 | #define MENELAUS_INT_MASK2 0x18 | |
81 | #define MENELAUS_INT_STATUS1 0x19 | |
82 | #define MENELAUS_INT_STATUS2 0x1A | |
83 | #define MENELAUS_INT_ACK1 0x1B | |
84 | #define MENELAUS_INT_ACK2 0x1C | |
85 | #define MENELAUS_GPIO_CTRL 0x1D | |
86 | #define MENELAUS_GPIO_IN 0x1E | |
87 | #define MENELAUS_GPIO_OUT 0x1F | |
88 | #define MENELAUS_BBSMS 0x20 | |
89 | #define MENELAUS_RTC_CTRL 0x21 | |
90 | #define MENELAUS_RTC_UPDATE 0x22 | |
91 | #define MENELAUS_RTC_SEC 0x23 | |
92 | #define MENELAUS_RTC_MIN 0x24 | |
93 | #define MENELAUS_RTC_HR 0x25 | |
94 | #define MENELAUS_RTC_DAY 0x26 | |
95 | #define MENELAUS_RTC_MON 0x27 | |
96 | #define MENELAUS_RTC_YR 0x28 | |
97 | #define MENELAUS_RTC_WKDAY 0x29 | |
98 | #define MENELAUS_RTC_AL_SEC 0x2A | |
99 | #define MENELAUS_RTC_AL_MIN 0x2B | |
100 | #define MENELAUS_RTC_AL_HR 0x2C | |
101 | #define MENELAUS_RTC_AL_DAY 0x2D | |
102 | #define MENELAUS_RTC_AL_MON 0x2E | |
103 | #define MENELAUS_RTC_AL_YR 0x2F | |
104 | #define MENELAUS_RTC_COMP_MSB 0x30 | |
105 | #define MENELAUS_RTC_COMP_LSB 0x31 | |
106 | #define MENELAUS_S1_PULL_EN 0x32 | |
107 | #define MENELAUS_S1_PULL_DIR 0x33 | |
108 | #define MENELAUS_S2_PULL_EN 0x34 | |
109 | #define MENELAUS_S2_PULL_DIR 0x35 | |
110 | #define MENELAUS_MCT_CTRL1 0x36 | |
111 | #define MENELAUS_MCT_CTRL2 0x37 | |
112 | #define MENELAUS_MCT_CTRL3 0x38 | |
113 | #define MENELAUS_MCT_PIN_ST 0x39 | |
114 | #define MENELAUS_DEBOUNCE1 0x3A | |
115 | ||
116 | #define IH_MENELAUS_IRQS 12 | |
117 | #define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */ | |
118 | #define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */ | |
119 | #define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */ | |
120 | #define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */ | |
121 | #define MENELAUS_LOWBAT_IRQ 4 /* Low battery */ | |
122 | #define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */ | |
123 | #define MENELAUS_UVLO_IRQ 6 /* UVLO detect */ | |
124 | #define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */ | |
125 | #define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */ | |
126 | #define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */ | |
127 | #define MENELAUS_RTCERR_IRQ 10 /* RTC error */ | |
128 | #define MENELAUS_PSHBTN_IRQ 11 /* Push button */ | |
129 | #define MENELAUS_RESERVED12_IRQ 12 /* Reserved */ | |
130 | #define MENELAUS_RESERVED13_IRQ 13 /* Reserved */ | |
131 | #define MENELAUS_RESERVED14_IRQ 14 /* Reserved */ | |
132 | #define MENELAUS_RESERVED15_IRQ 15 /* Reserved */ | |
133 | ||
134 | static void menelaus_work(struct work_struct *_menelaus); | |
135 | ||
136 | struct menelaus_chip { | |
137 | struct mutex lock; | |
138 | struct i2c_client *client; | |
139 | struct work_struct work; | |
140 | #ifdef CONFIG_RTC_DRV_TWL92330 | |
141 | struct rtc_device *rtc; | |
142 | u8 rtc_control; | |
143 | unsigned uie:1; | |
144 | #endif | |
145 | unsigned vcore_hw_mode:1; | |
146 | u8 mask1, mask2; | |
147 | void (*handlers[16])(struct menelaus_chip *); | |
148 | void (*mmc_callback)(void *data, u8 mask); | |
149 | void *mmc_callback_data; | |
150 | }; | |
151 | ||
152 | static struct menelaus_chip *the_menelaus; | |
153 | ||
154 | static int menelaus_write_reg(int reg, u8 value) | |
155 | { | |
156 | int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value); | |
157 | ||
158 | if (val < 0) { | |
159 | pr_err("write error"); | |
160 | return val; | |
161 | } | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static int menelaus_read_reg(int reg) | |
167 | { | |
168 | int val = i2c_smbus_read_byte_data(the_menelaus->client, reg); | |
169 | ||
170 | if (val < 0) | |
171 | pr_err("read error"); | |
172 | ||
173 | return val; | |
174 | } | |
175 | ||
176 | static int menelaus_enable_irq(int irq) | |
177 | { | |
178 | if (irq > 7) { | |
179 | irq -= 8; | |
180 | the_menelaus->mask2 &= ~(1 << irq); | |
181 | return menelaus_write_reg(MENELAUS_INT_MASK2, | |
182 | the_menelaus->mask2); | |
183 | } else { | |
184 | the_menelaus->mask1 &= ~(1 << irq); | |
185 | return menelaus_write_reg(MENELAUS_INT_MASK1, | |
186 | the_menelaus->mask1); | |
187 | } | |
188 | } | |
189 | ||
190 | static int menelaus_disable_irq(int irq) | |
191 | { | |
192 | if (irq > 7) { | |
193 | irq -= 8; | |
194 | the_menelaus->mask2 |= (1 << irq); | |
195 | return menelaus_write_reg(MENELAUS_INT_MASK2, | |
196 | the_menelaus->mask2); | |
197 | } else { | |
198 | the_menelaus->mask1 |= (1 << irq); | |
199 | return menelaus_write_reg(MENELAUS_INT_MASK1, | |
200 | the_menelaus->mask1); | |
201 | } | |
202 | } | |
203 | ||
204 | static int menelaus_ack_irq(int irq) | |
205 | { | |
206 | if (irq > 7) | |
207 | return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8)); | |
208 | else | |
209 | return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq); | |
210 | } | |
211 | ||
212 | /* Adds a handler for an interrupt. Does not run in interrupt context */ | |
213 | static int menelaus_add_irq_work(int irq, | |
214 | void (*handler)(struct menelaus_chip *)) | |
215 | { | |
216 | int ret = 0; | |
217 | ||
218 | mutex_lock(&the_menelaus->lock); | |
219 | the_menelaus->handlers[irq] = handler; | |
220 | ret = menelaus_enable_irq(irq); | |
221 | mutex_unlock(&the_menelaus->lock); | |
222 | ||
223 | return ret; | |
224 | } | |
225 | ||
226 | /* Removes handler for an interrupt */ | |
227 | static int menelaus_remove_irq_work(int irq) | |
228 | { | |
229 | int ret = 0; | |
230 | ||
231 | mutex_lock(&the_menelaus->lock); | |
232 | ret = menelaus_disable_irq(irq); | |
233 | the_menelaus->handlers[irq] = NULL; | |
234 | mutex_unlock(&the_menelaus->lock); | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
239 | /* | |
240 | * Gets scheduled when a card detect interrupt happens. Note that in some cases | |
241 | * this line is wired to card cover switch rather than the card detect switch | |
242 | * in each slot. In this case the cards are not seen by menelaus. | |
243 | * FIXME: Add handling for D1 too | |
244 | */ | |
245 | static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw) | |
246 | { | |
247 | int reg; | |
248 | unsigned char card_mask = 0; | |
249 | ||
250 | reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST); | |
251 | if (reg < 0) | |
252 | return; | |
253 | ||
254 | if (!(reg & 0x1)) | |
255 | card_mask |= (1 << 0); | |
256 | ||
257 | if (!(reg & 0x2)) | |
258 | card_mask |= (1 << 1); | |
259 | ||
260 | if (menelaus_hw->mmc_callback) | |
261 | menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data, | |
262 | card_mask); | |
263 | } | |
264 | ||
265 | /* | |
266 | * Toggles the MMC slots between open-drain and push-pull mode. | |
267 | */ | |
268 | int menelaus_set_mmc_opendrain(int slot, int enable) | |
269 | { | |
270 | int ret, val; | |
271 | ||
272 | if (slot != 1 && slot != 2) | |
273 | return -EINVAL; | |
274 | mutex_lock(&the_menelaus->lock); | |
275 | ret = menelaus_read_reg(MENELAUS_MCT_CTRL1); | |
276 | if (ret < 0) { | |
277 | mutex_unlock(&the_menelaus->lock); | |
278 | return ret; | |
279 | } | |
280 | val = ret; | |
281 | if (slot == 1) { | |
282 | if (enable) | |
283 | val |= 1 << 2; | |
284 | else | |
285 | val &= ~(1 << 2); | |
286 | } else { | |
287 | if (enable) | |
288 | val |= 1 << 3; | |
289 | else | |
290 | val &= ~(1 << 3); | |
291 | } | |
292 | ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val); | |
293 | mutex_unlock(&the_menelaus->lock); | |
294 | ||
295 | return ret; | |
296 | } | |
297 | EXPORT_SYMBOL(menelaus_set_mmc_opendrain); | |
298 | ||
299 | int menelaus_set_slot_sel(int enable) | |
300 | { | |
301 | int ret; | |
302 | ||
303 | mutex_lock(&the_menelaus->lock); | |
304 | ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); | |
305 | if (ret < 0) | |
306 | goto out; | |
307 | ret |= 0x02; | |
308 | if (enable) | |
309 | ret |= 1 << 5; | |
310 | else | |
311 | ret &= ~(1 << 5); | |
312 | ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); | |
313 | out: | |
314 | mutex_unlock(&the_menelaus->lock); | |
315 | return ret; | |
316 | } | |
317 | EXPORT_SYMBOL(menelaus_set_slot_sel); | |
318 | ||
319 | int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en) | |
320 | { | |
321 | int ret, val; | |
322 | ||
323 | if (slot != 1 && slot != 2) | |
324 | return -EINVAL; | |
325 | if (power >= 3) | |
326 | return -EINVAL; | |
327 | ||
328 | mutex_lock(&the_menelaus->lock); | |
329 | ||
330 | ret = menelaus_read_reg(MENELAUS_MCT_CTRL2); | |
331 | if (ret < 0) | |
332 | goto out; | |
333 | val = ret; | |
334 | if (slot == 1) { | |
335 | if (cd_en) | |
336 | val |= (1 << 4) | (1 << 6); | |
337 | else | |
338 | val &= ~((1 << 4) | (1 << 6)); | |
339 | } else { | |
340 | if (cd_en) | |
341 | val |= (1 << 5) | (1 << 7); | |
342 | else | |
343 | val &= ~((1 << 5) | (1 << 7)); | |
344 | } | |
345 | ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val); | |
346 | if (ret < 0) | |
347 | goto out; | |
348 | ||
349 | ret = menelaus_read_reg(MENELAUS_MCT_CTRL3); | |
350 | if (ret < 0) | |
351 | goto out; | |
352 | val = ret; | |
353 | if (slot == 1) { | |
354 | if (enable) | |
355 | val |= 1 << 0; | |
356 | else | |
357 | val &= ~(1 << 0); | |
358 | } else { | |
359 | int b; | |
360 | ||
361 | if (enable) | |
362 | ret |= 1 << 1; | |
363 | else | |
364 | ret &= ~(1 << 1); | |
365 | b = menelaus_read_reg(MENELAUS_MCT_CTRL2); | |
366 | b &= ~0x03; | |
367 | b |= power; | |
368 | ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b); | |
369 | if (ret < 0) | |
370 | goto out; | |
371 | } | |
372 | /* Disable autonomous shutdown */ | |
373 | val &= ~(0x03 << 2); | |
374 | ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val); | |
375 | out: | |
376 | mutex_unlock(&the_menelaus->lock); | |
377 | return ret; | |
378 | } | |
379 | EXPORT_SYMBOL(menelaus_set_mmc_slot); | |
380 | ||
381 | int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask), | |
382 | void *data) | |
383 | { | |
384 | int ret = 0; | |
385 | ||
386 | the_menelaus->mmc_callback_data = data; | |
387 | the_menelaus->mmc_callback = callback; | |
388 | ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ, | |
389 | menelaus_mmc_cd_work); | |
390 | if (ret < 0) | |
391 | return ret; | |
392 | ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ, | |
393 | menelaus_mmc_cd_work); | |
394 | if (ret < 0) | |
395 | return ret; | |
396 | ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ, | |
397 | menelaus_mmc_cd_work); | |
398 | if (ret < 0) | |
399 | return ret; | |
400 | ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ, | |
401 | menelaus_mmc_cd_work); | |
402 | ||
403 | return ret; | |
404 | } | |
405 | EXPORT_SYMBOL(menelaus_register_mmc_callback); | |
406 | ||
407 | void menelaus_unregister_mmc_callback(void) | |
408 | { | |
409 | menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ); | |
410 | menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ); | |
411 | menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ); | |
412 | menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ); | |
413 | ||
414 | the_menelaus->mmc_callback = NULL; | |
415 | the_menelaus->mmc_callback_data = 0; | |
416 | } | |
417 | EXPORT_SYMBOL(menelaus_unregister_mmc_callback); | |
418 | ||
419 | struct menelaus_vtg { | |
420 | const char *name; | |
421 | u8 vtg_reg; | |
422 | u8 vtg_shift; | |
423 | u8 vtg_bits; | |
424 | u8 mode_reg; | |
425 | }; | |
426 | ||
427 | struct menelaus_vtg_value { | |
428 | u16 vtg; | |
429 | u16 val; | |
430 | }; | |
431 | ||
432 | static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV, | |
433 | int vtg_val, int mode) | |
434 | { | |
435 | int val, ret; | |
436 | struct i2c_client *c = the_menelaus->client; | |
437 | ||
438 | mutex_lock(&the_menelaus->lock); | |
439 | if (vtg == 0) | |
440 | goto set_voltage; | |
441 | ||
442 | ret = menelaus_read_reg(vtg->vtg_reg); | |
443 | if (ret < 0) | |
444 | goto out; | |
445 | val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift); | |
446 | val |= vtg_val << vtg->vtg_shift; | |
447 | ||
448 | dev_dbg(&c->dev, "Setting voltage '%s'" | |
449 | "to %d mV (reg 0x%02x, val 0x%02x)\n", | |
450 | vtg->name, mV, vtg->vtg_reg, val); | |
451 | ||
452 | ret = menelaus_write_reg(vtg->vtg_reg, val); | |
453 | if (ret < 0) | |
454 | goto out; | |
455 | set_voltage: | |
456 | ret = menelaus_write_reg(vtg->mode_reg, mode); | |
457 | out: | |
458 | mutex_unlock(&the_menelaus->lock); | |
459 | if (ret == 0) { | |
460 | /* Wait for voltage to stabilize */ | |
461 | msleep(1); | |
462 | } | |
463 | return ret; | |
464 | } | |
465 | ||
466 | static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl, | |
467 | int n) | |
468 | { | |
469 | int i; | |
470 | ||
471 | for (i = 0; i < n; i++, tbl++) | |
472 | if (tbl->vtg == vtg) | |
473 | return tbl->val; | |
474 | return -EINVAL; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Vcore can be programmed in two ways: | |
479 | * SW-controlled: Required voltage is programmed into VCORE_CTRL1 | |
480 | * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3 | |
481 | * and VCORE_CTRL4 | |
482 | * | |
483 | * Call correct 'set' function accordingly | |
484 | */ | |
485 | ||
486 | static const struct menelaus_vtg_value vcore_values[] = { | |
487 | { 1000, 0 }, | |
488 | { 1025, 1 }, | |
489 | { 1050, 2 }, | |
490 | { 1075, 3 }, | |
491 | { 1100, 4 }, | |
492 | { 1125, 5 }, | |
493 | { 1150, 6 }, | |
494 | { 1175, 7 }, | |
495 | { 1200, 8 }, | |
496 | { 1225, 9 }, | |
497 | { 1250, 10 }, | |
498 | { 1275, 11 }, | |
499 | { 1300, 12 }, | |
500 | { 1325, 13 }, | |
501 | { 1350, 14 }, | |
502 | { 1375, 15 }, | |
503 | { 1400, 16 }, | |
504 | { 1425, 17 }, | |
505 | { 1450, 18 }, | |
506 | }; | |
507 | ||
508 | int menelaus_set_vcore_sw(unsigned int mV) | |
509 | { | |
510 | int val, ret; | |
511 | struct i2c_client *c = the_menelaus->client; | |
512 | ||
513 | val = menelaus_get_vtg_value(mV, vcore_values, | |
514 | ARRAY_SIZE(vcore_values)); | |
515 | if (val < 0) | |
516 | return -EINVAL; | |
517 | ||
518 | dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val); | |
519 | ||
520 | /* Set SW mode and the voltage in one go. */ | |
521 | mutex_lock(&the_menelaus->lock); | |
522 | ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val); | |
523 | if (ret == 0) | |
524 | the_menelaus->vcore_hw_mode = 0; | |
525 | mutex_unlock(&the_menelaus->lock); | |
526 | msleep(1); | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV) | |
532 | { | |
533 | int fval, rval, val, ret; | |
534 | struct i2c_client *c = the_menelaus->client; | |
535 | ||
536 | rval = menelaus_get_vtg_value(roof_mV, vcore_values, | |
537 | ARRAY_SIZE(vcore_values)); | |
538 | if (rval < 0) | |
539 | return -EINVAL; | |
540 | fval = menelaus_get_vtg_value(floor_mV, vcore_values, | |
541 | ARRAY_SIZE(vcore_values)); | |
542 | if (fval < 0) | |
543 | return -EINVAL; | |
544 | ||
545 | dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n", | |
546 | floor_mV, roof_mV); | |
547 | ||
548 | mutex_lock(&the_menelaus->lock); | |
549 | ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval); | |
550 | if (ret < 0) | |
551 | goto out; | |
552 | ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval); | |
553 | if (ret < 0) | |
554 | goto out; | |
555 | if (!the_menelaus->vcore_hw_mode) { | |
556 | val = menelaus_read_reg(MENELAUS_VCORE_CTRL1); | |
557 | /* HW mode, turn OFF byte comparator */ | |
558 | val |= ((1 << 7) | (1 << 5)); | |
559 | ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val); | |
560 | the_menelaus->vcore_hw_mode = 1; | |
561 | } | |
562 | msleep(1); | |
563 | out: | |
564 | mutex_unlock(&the_menelaus->lock); | |
565 | return ret; | |
566 | } | |
567 | ||
568 | static const struct menelaus_vtg vmem_vtg = { | |
569 | .name = "VMEM", | |
570 | .vtg_reg = MENELAUS_LDO_CTRL1, | |
571 | .vtg_shift = 0, | |
572 | .vtg_bits = 2, | |
573 | .mode_reg = MENELAUS_LDO_CTRL3, | |
574 | }; | |
575 | ||
576 | static const struct menelaus_vtg_value vmem_values[] = { | |
577 | { 1500, 0 }, | |
578 | { 1800, 1 }, | |
579 | { 1900, 2 }, | |
580 | { 2500, 3 }, | |
581 | }; | |
582 | ||
583 | int menelaus_set_vmem(unsigned int mV) | |
584 | { | |
585 | int val; | |
586 | ||
587 | if (mV == 0) | |
588 | return menelaus_set_voltage(&vmem_vtg, 0, 0, 0); | |
589 | ||
590 | val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values)); | |
591 | if (val < 0) | |
592 | return -EINVAL; | |
593 | return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02); | |
594 | } | |
595 | EXPORT_SYMBOL(menelaus_set_vmem); | |
596 | ||
597 | static const struct menelaus_vtg vio_vtg = { | |
598 | .name = "VIO", | |
599 | .vtg_reg = MENELAUS_LDO_CTRL1, | |
600 | .vtg_shift = 2, | |
601 | .vtg_bits = 2, | |
602 | .mode_reg = MENELAUS_LDO_CTRL4, | |
603 | }; | |
604 | ||
605 | static const struct menelaus_vtg_value vio_values[] = { | |
606 | { 1500, 0 }, | |
607 | { 1800, 1 }, | |
608 | { 2500, 2 }, | |
609 | { 2800, 3 }, | |
610 | }; | |
611 | ||
612 | int menelaus_set_vio(unsigned int mV) | |
613 | { | |
614 | int val; | |
615 | ||
616 | if (mV == 0) | |
617 | return menelaus_set_voltage(&vio_vtg, 0, 0, 0); | |
618 | ||
619 | val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values)); | |
620 | if (val < 0) | |
621 | return -EINVAL; | |
622 | return menelaus_set_voltage(&vio_vtg, mV, val, 0x02); | |
623 | } | |
624 | EXPORT_SYMBOL(menelaus_set_vio); | |
625 | ||
626 | static const struct menelaus_vtg_value vdcdc_values[] = { | |
627 | { 1500, 0 }, | |
628 | { 1800, 1 }, | |
629 | { 2000, 2 }, | |
630 | { 2200, 3 }, | |
631 | { 2400, 4 }, | |
632 | { 2800, 5 }, | |
633 | { 3000, 6 }, | |
634 | { 3300, 7 }, | |
635 | }; | |
636 | ||
637 | static const struct menelaus_vtg vdcdc2_vtg = { | |
638 | .name = "VDCDC2", | |
639 | .vtg_reg = MENELAUS_DCDC_CTRL1, | |
640 | .vtg_shift = 0, | |
641 | .vtg_bits = 3, | |
642 | .mode_reg = MENELAUS_DCDC_CTRL2, | |
643 | }; | |
644 | ||
645 | static const struct menelaus_vtg vdcdc3_vtg = { | |
646 | .name = "VDCDC3", | |
647 | .vtg_reg = MENELAUS_DCDC_CTRL1, | |
648 | .vtg_shift = 3, | |
649 | .vtg_bits = 3, | |
650 | .mode_reg = MENELAUS_DCDC_CTRL3, | |
651 | }; | |
652 | ||
653 | int menelaus_set_vdcdc(int dcdc, unsigned int mV) | |
654 | { | |
655 | const struct menelaus_vtg *vtg; | |
656 | int val; | |
657 | ||
658 | if (dcdc != 2 && dcdc != 3) | |
659 | return -EINVAL; | |
660 | if (dcdc == 2) | |
661 | vtg = &vdcdc2_vtg; | |
662 | else | |
663 | vtg = &vdcdc3_vtg; | |
664 | ||
665 | if (mV == 0) | |
666 | return menelaus_set_voltage(vtg, 0, 0, 0); | |
667 | ||
668 | val = menelaus_get_vtg_value(mV, vdcdc_values, | |
669 | ARRAY_SIZE(vdcdc_values)); | |
670 | if (val < 0) | |
671 | return -EINVAL; | |
672 | return menelaus_set_voltage(vtg, mV, val, 0x03); | |
673 | } | |
674 | ||
675 | static const struct menelaus_vtg_value vmmc_values[] = { | |
676 | { 1850, 0 }, | |
677 | { 2800, 1 }, | |
678 | { 3000, 2 }, | |
679 | { 3100, 3 }, | |
680 | }; | |
681 | ||
682 | static const struct menelaus_vtg vmmc_vtg = { | |
683 | .name = "VMMC", | |
684 | .vtg_reg = MENELAUS_LDO_CTRL1, | |
685 | .vtg_shift = 6, | |
686 | .vtg_bits = 2, | |
687 | .mode_reg = MENELAUS_LDO_CTRL7, | |
688 | }; | |
689 | ||
690 | int menelaus_set_vmmc(unsigned int mV) | |
691 | { | |
692 | int val; | |
693 | ||
694 | if (mV == 0) | |
695 | return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0); | |
696 | ||
697 | val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values)); | |
698 | if (val < 0) | |
699 | return -EINVAL; | |
700 | return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02); | |
701 | } | |
702 | EXPORT_SYMBOL(menelaus_set_vmmc); | |
703 | ||
704 | ||
705 | static const struct menelaus_vtg_value vaux_values[] = { | |
706 | { 1500, 0 }, | |
707 | { 1800, 1 }, | |
708 | { 2500, 2 }, | |
709 | { 2800, 3 }, | |
710 | }; | |
711 | ||
712 | static const struct menelaus_vtg vaux_vtg = { | |
713 | .name = "VAUX", | |
714 | .vtg_reg = MENELAUS_LDO_CTRL1, | |
715 | .vtg_shift = 4, | |
716 | .vtg_bits = 2, | |
717 | .mode_reg = MENELAUS_LDO_CTRL6, | |
718 | }; | |
719 | ||
720 | int menelaus_set_vaux(unsigned int mV) | |
721 | { | |
722 | int val; | |
723 | ||
724 | if (mV == 0) | |
725 | return menelaus_set_voltage(&vaux_vtg, 0, 0, 0); | |
726 | ||
727 | val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values)); | |
728 | if (val < 0) | |
729 | return -EINVAL; | |
730 | return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02); | |
731 | } | |
732 | EXPORT_SYMBOL(menelaus_set_vaux); | |
733 | ||
734 | int menelaus_get_slot_pin_states(void) | |
735 | { | |
736 | return menelaus_read_reg(MENELAUS_MCT_PIN_ST); | |
737 | } | |
738 | EXPORT_SYMBOL(menelaus_get_slot_pin_states); | |
739 | ||
740 | int menelaus_set_regulator_sleep(int enable, u32 val) | |
741 | { | |
742 | int t, ret; | |
743 | struct i2c_client *c = the_menelaus->client; | |
744 | ||
745 | mutex_lock(&the_menelaus->lock); | |
746 | ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val); | |
747 | if (ret < 0) | |
748 | goto out; | |
749 | ||
750 | dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val); | |
751 | ||
752 | ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); | |
753 | if (ret < 0) | |
754 | goto out; | |
755 | t = ((1 << 6) | 0x04); | |
756 | if (enable) | |
757 | ret |= t; | |
758 | else | |
759 | ret &= ~t; | |
760 | ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); | |
761 | out: | |
762 | mutex_unlock(&the_menelaus->lock); | |
763 | return ret; | |
764 | } | |
765 | ||
766 | /*-----------------------------------------------------------------------*/ | |
767 | ||
768 | /* Handles Menelaus interrupts. Does not run in interrupt context */ | |
769 | static void menelaus_work(struct work_struct *_menelaus) | |
770 | { | |
771 | struct menelaus_chip *menelaus = | |
772 | container_of(_menelaus, struct menelaus_chip, work); | |
773 | void (*handler)(struct menelaus_chip *menelaus); | |
774 | ||
775 | while (1) { | |
776 | unsigned isr; | |
777 | ||
778 | isr = (menelaus_read_reg(MENELAUS_INT_STATUS2) | |
779 | & ~menelaus->mask2) << 8; | |
780 | isr |= menelaus_read_reg(MENELAUS_INT_STATUS1) | |
781 | & ~menelaus->mask1; | |
782 | if (!isr) | |
783 | break; | |
784 | ||
785 | while (isr) { | |
786 | int irq = fls(isr) - 1; | |
787 | isr &= ~(1 << irq); | |
788 | ||
789 | mutex_lock(&menelaus->lock); | |
790 | menelaus_disable_irq(irq); | |
791 | menelaus_ack_irq(irq); | |
792 | handler = menelaus->handlers[irq]; | |
793 | if (handler) | |
794 | handler(menelaus); | |
795 | menelaus_enable_irq(irq); | |
796 | mutex_unlock(&menelaus->lock); | |
797 | } | |
798 | } | |
799 | enable_irq(menelaus->client->irq); | |
800 | } | |
801 | ||
802 | /* | |
803 | * We cannot use I2C in interrupt context, so we just schedule work. | |
804 | */ | |
805 | static irqreturn_t menelaus_irq(int irq, void *_menelaus) | |
806 | { | |
807 | struct menelaus_chip *menelaus = _menelaus; | |
808 | ||
809 | disable_irq_nosync(irq); | |
810 | (void)schedule_work(&menelaus->work); | |
811 | ||
812 | return IRQ_HANDLED; | |
813 | } | |
814 | ||
815 | /*-----------------------------------------------------------------------*/ | |
816 | ||
817 | /* | |
818 | * The RTC needs to be set once, then it runs on backup battery power. | |
819 | * It supports alarms, including system wake alarms (from some modes); | |
820 | * and 1/second IRQs if requested. | |
821 | */ | |
822 | #ifdef CONFIG_RTC_DRV_TWL92330 | |
823 | ||
824 | #define RTC_CTRL_RTC_EN (1 << 0) | |
825 | #define RTC_CTRL_AL_EN (1 << 1) | |
826 | #define RTC_CTRL_MODE12 (1 << 2) | |
827 | #define RTC_CTRL_EVERY_MASK (3 << 3) | |
828 | #define RTC_CTRL_EVERY_SEC (0 << 3) | |
829 | #define RTC_CTRL_EVERY_MIN (1 << 3) | |
830 | #define RTC_CTRL_EVERY_HR (2 << 3) | |
831 | #define RTC_CTRL_EVERY_DAY (3 << 3) | |
832 | ||
833 | #define RTC_UPDATE_EVERY 0x08 | |
834 | ||
835 | #define RTC_HR_PM (1 << 7) | |
836 | ||
837 | static void menelaus_to_time(char *regs, struct rtc_time *t) | |
838 | { | |
839 | t->tm_sec = BCD2BIN(regs[0]); | |
840 | t->tm_min = BCD2BIN(regs[1]); | |
841 | if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { | |
842 | t->tm_hour = BCD2BIN(regs[2] & 0x1f) - 1; | |
843 | if (regs[2] & RTC_HR_PM) | |
844 | t->tm_hour += 12; | |
845 | } else | |
846 | t->tm_hour = BCD2BIN(regs[2] & 0x3f); | |
847 | t->tm_mday = BCD2BIN(regs[3]); | |
848 | t->tm_mon = BCD2BIN(regs[4]) - 1; | |
849 | t->tm_year = BCD2BIN(regs[5]) + 100; | |
850 | } | |
851 | ||
852 | static int time_to_menelaus(struct rtc_time *t, int regnum) | |
853 | { | |
854 | int hour, status; | |
855 | ||
856 | status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_sec)); | |
857 | if (status < 0) | |
858 | goto fail; | |
859 | ||
860 | status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_min)); | |
861 | if (status < 0) | |
862 | goto fail; | |
863 | ||
864 | if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { | |
865 | hour = t->tm_hour + 1; | |
866 | if (hour > 12) | |
867 | hour = RTC_HR_PM | BIN2BCD(hour - 12); | |
868 | else | |
869 | hour = BIN2BCD(hour); | |
870 | } else | |
871 | hour = BIN2BCD(t->tm_hour); | |
872 | status = menelaus_write_reg(regnum++, hour); | |
873 | if (status < 0) | |
874 | goto fail; | |
875 | ||
876 | status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mday)); | |
877 | if (status < 0) | |
878 | goto fail; | |
879 | ||
880 | status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mon + 1)); | |
881 | if (status < 0) | |
882 | goto fail; | |
883 | ||
884 | status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_year - 100)); | |
885 | if (status < 0) | |
886 | goto fail; | |
887 | ||
888 | return 0; | |
889 | fail: | |
890 | dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n", | |
891 | --regnum, status); | |
892 | return status; | |
893 | } | |
894 | ||
895 | static int menelaus_read_time(struct device *dev, struct rtc_time *t) | |
896 | { | |
897 | struct i2c_msg msg[2]; | |
898 | char regs[7]; | |
899 | int status; | |
900 | ||
901 | /* block read date and time registers */ | |
902 | regs[0] = MENELAUS_RTC_SEC; | |
903 | ||
904 | msg[0].addr = MENELAUS_I2C_ADDRESS; | |
905 | msg[0].flags = 0; | |
906 | msg[0].len = 1; | |
907 | msg[0].buf = regs; | |
908 | ||
909 | msg[1].addr = MENELAUS_I2C_ADDRESS; | |
910 | msg[1].flags = I2C_M_RD; | |
911 | msg[1].len = sizeof(regs); | |
912 | msg[1].buf = regs; | |
913 | ||
914 | status = i2c_transfer(the_menelaus->client->adapter, msg, 2); | |
915 | if (status != 2) { | |
916 | dev_err(dev, "%s error %d\n", "read", status); | |
917 | return -EIO; | |
918 | } | |
919 | ||
920 | menelaus_to_time(regs, t); | |
921 | t->tm_wday = BCD2BIN(regs[6]); | |
922 | ||
923 | return 0; | |
924 | } | |
925 | ||
926 | static int menelaus_set_time(struct device *dev, struct rtc_time *t) | |
927 | { | |
928 | int status; | |
929 | ||
930 | /* write date and time registers */ | |
931 | status = time_to_menelaus(t, MENELAUS_RTC_SEC); | |
932 | if (status < 0) | |
933 | return status; | |
934 | status = menelaus_write_reg(MENELAUS_RTC_WKDAY, BIN2BCD(t->tm_wday)); | |
935 | if (status < 0) { | |
936 | dev_err(&the_menelaus->client->dev, "rtc write reg %02x", | |
937 | "err %d\n", MENELAUS_RTC_WKDAY, status); | |
938 | return status; | |
939 | } | |
940 | ||
941 | /* now commit the write */ | |
942 | status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY); | |
943 | if (status < 0) | |
944 | dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n", | |
945 | status); | |
946 | ||
947 | return 0; | |
948 | } | |
949 | ||
950 | static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w) | |
951 | { | |
952 | struct i2c_msg msg[2]; | |
953 | char regs[6]; | |
954 | int status; | |
955 | ||
956 | /* block read alarm registers */ | |
957 | regs[0] = MENELAUS_RTC_AL_SEC; | |
958 | ||
959 | msg[0].addr = MENELAUS_I2C_ADDRESS; | |
960 | msg[0].flags = 0; | |
961 | msg[0].len = 1; | |
962 | msg[0].buf = regs; | |
963 | ||
964 | msg[1].addr = MENELAUS_I2C_ADDRESS; | |
965 | msg[1].flags = I2C_M_RD; | |
966 | msg[1].len = sizeof(regs); | |
967 | msg[1].buf = regs; | |
968 | ||
969 | status = i2c_transfer(the_menelaus->client->adapter, msg, 2); | |
970 | if (status != 2) { | |
971 | dev_err(dev, "%s error %d\n", "alarm read", status); | |
972 | return -EIO; | |
973 | } | |
974 | ||
975 | menelaus_to_time(regs, &w->time); | |
976 | ||
977 | w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN); | |
978 | ||
979 | /* NOTE we *could* check if actually pending... */ | |
980 | w->pending = 0; | |
981 | ||
982 | return 0; | |
983 | } | |
984 | ||
985 | static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w) | |
986 | { | |
987 | int status; | |
988 | ||
989 | if (the_menelaus->client->irq <= 0 && w->enabled) | |
990 | return -ENODEV; | |
991 | ||
992 | /* clear previous alarm enable */ | |
993 | if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) { | |
994 | the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; | |
995 | status = menelaus_write_reg(MENELAUS_RTC_CTRL, | |
996 | the_menelaus->rtc_control); | |
997 | if (status < 0) | |
998 | return status; | |
999 | } | |
1000 | ||
1001 | /* write alarm registers */ | |
1002 | status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC); | |
1003 | if (status < 0) | |
1004 | return status; | |
1005 | ||
1006 | /* enable alarm if requested */ | |
1007 | if (w->enabled) { | |
1008 | the_menelaus->rtc_control |= RTC_CTRL_AL_EN; | |
1009 | status = menelaus_write_reg(MENELAUS_RTC_CTRL, | |
1010 | the_menelaus->rtc_control); | |
1011 | } | |
1012 | ||
1013 | return status; | |
1014 | } | |
1015 | ||
1016 | #ifdef CONFIG_RTC_INTF_DEV | |
1017 | ||
1018 | static void menelaus_rtc_update_work(struct menelaus_chip *m) | |
1019 | { | |
1020 | /* report 1/sec update */ | |
1021 | local_irq_disable(); | |
1022 | rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF); | |
1023 | local_irq_enable(); | |
1024 | } | |
1025 | ||
1026 | static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg) | |
1027 | { | |
1028 | int status; | |
1029 | ||
1030 | if (the_menelaus->client->irq <= 0) | |
1031 | return -ENOIOCTLCMD; | |
1032 | ||
1033 | switch (cmd) { | |
1034 | /* alarm IRQ */ | |
1035 | case RTC_AIE_ON: | |
1036 | if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) | |
1037 | return 0; | |
1038 | the_menelaus->rtc_control |= RTC_CTRL_AL_EN; | |
1039 | break; | |
1040 | case RTC_AIE_OFF: | |
1041 | if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN)) | |
1042 | return 0; | |
1043 | the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; | |
1044 | break; | |
1045 | /* 1/second "update" IRQ */ | |
1046 | case RTC_UIE_ON: | |
1047 | if (the_menelaus->uie) | |
1048 | return 0; | |
1049 | status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); | |
1050 | status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ, | |
1051 | menelaus_rtc_update_work); | |
1052 | if (status == 0) | |
1053 | the_menelaus->uie = 1; | |
1054 | return status; | |
1055 | case RTC_UIE_OFF: | |
1056 | if (!the_menelaus->uie) | |
1057 | return 0; | |
1058 | status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); | |
1059 | if (status == 0) | |
1060 | the_menelaus->uie = 0; | |
1061 | return status; | |
1062 | default: | |
1063 | return -ENOIOCTLCMD; | |
1064 | } | |
1065 | return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); | |
1066 | } | |
1067 | ||
1068 | #else | |
1069 | #define menelaus_ioctl NULL | |
1070 | #endif | |
1071 | ||
1072 | /* REVISIT no compensation register support ... */ | |
1073 | ||
1074 | static const struct rtc_class_ops menelaus_rtc_ops = { | |
1075 | .ioctl = menelaus_ioctl, | |
1076 | .read_time = menelaus_read_time, | |
1077 | .set_time = menelaus_set_time, | |
1078 | .read_alarm = menelaus_read_alarm, | |
1079 | .set_alarm = menelaus_set_alarm, | |
1080 | }; | |
1081 | ||
1082 | static void menelaus_rtc_alarm_work(struct menelaus_chip *m) | |
1083 | { | |
1084 | /* report alarm */ | |
1085 | local_irq_disable(); | |
1086 | rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF); | |
1087 | local_irq_enable(); | |
1088 | ||
1089 | /* then disable it; alarms are oneshot */ | |
1090 | the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; | |
1091 | menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); | |
1092 | } | |
1093 | ||
1094 | static inline void menelaus_rtc_init(struct menelaus_chip *m) | |
1095 | { | |
1096 | int alarm = (m->client->irq > 0); | |
1097 | ||
1098 | /* assume 32KDETEN pin is pulled high */ | |
1099 | if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) { | |
1100 | dev_dbg(&m->client->dev, "no 32k oscillator\n"); | |
1101 | return; | |
1102 | } | |
1103 | ||
1104 | /* support RTC alarm; it can issue wakeups */ | |
1105 | if (alarm) { | |
1106 | if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ, | |
1107 | menelaus_rtc_alarm_work) < 0) { | |
1108 | dev_err(&m->client->dev, "can't handle RTC alarm\n"); | |
1109 | return; | |
1110 | } | |
1111 | device_init_wakeup(&m->client->dev, 1); | |
1112 | } | |
1113 | ||
1114 | /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */ | |
1115 | m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL); | |
1116 | if (!(m->rtc_control & RTC_CTRL_RTC_EN) | |
1117 | || (m->rtc_control & RTC_CTRL_AL_EN) | |
1118 | || (m->rtc_control & RTC_CTRL_EVERY_MASK)) { | |
1119 | if (!(m->rtc_control & RTC_CTRL_RTC_EN)) { | |
1120 | dev_warn(&m->client->dev, "rtc clock needs setting\n"); | |
1121 | m->rtc_control |= RTC_CTRL_RTC_EN; | |
1122 | } | |
1123 | m->rtc_control &= ~RTC_CTRL_EVERY_MASK; | |
1124 | m->rtc_control &= ~RTC_CTRL_AL_EN; | |
1125 | menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control); | |
1126 | } | |
1127 | ||
1128 | m->rtc = rtc_device_register(DRIVER_NAME, | |
1129 | &m->client->dev, | |
1130 | &menelaus_rtc_ops, THIS_MODULE); | |
1131 | if (IS_ERR(m->rtc)) { | |
1132 | if (alarm) { | |
1133 | menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ); | |
1134 | device_init_wakeup(&m->client->dev, 0); | |
1135 | } | |
1136 | dev_err(&m->client->dev, "can't register RTC: %d\n", | |
1137 | (int) PTR_ERR(m->rtc)); | |
1138 | the_menelaus->rtc = NULL; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | #else | |
1143 | ||
1144 | static inline void menelaus_rtc_init(struct menelaus_chip *m) | |
1145 | { | |
1146 | /* nothing */ | |
1147 | } | |
1148 | ||
1149 | #endif | |
1150 | ||
1151 | /*-----------------------------------------------------------------------*/ | |
1152 | ||
1153 | static struct i2c_driver menelaus_i2c_driver; | |
1154 | ||
1155 | static int menelaus_probe(struct i2c_client *client) | |
1156 | { | |
1157 | struct menelaus_chip *menelaus; | |
1158 | int rev = 0, val; | |
1159 | int err = 0; | |
1160 | struct menelaus_platform_data *menelaus_pdata = | |
1161 | client->dev.platform_data; | |
1162 | ||
1163 | if (the_menelaus) { | |
1164 | dev_dbg(&client->dev, "only one %s for now\n", | |
1165 | DRIVER_NAME); | |
1166 | return -ENODEV; | |
1167 | } | |
1168 | ||
1169 | menelaus = kzalloc(sizeof *menelaus, GFP_KERNEL); | |
1170 | if (!menelaus) | |
1171 | return -ENOMEM; | |
1172 | ||
1173 | i2c_set_clientdata(client, menelaus); | |
1174 | ||
1175 | the_menelaus = menelaus; | |
1176 | menelaus->client = client; | |
1177 | ||
1178 | /* If a true probe check the device */ | |
1179 | rev = menelaus_read_reg(MENELAUS_REV); | |
1180 | if (rev < 0) { | |
1181 | pr_err("device not found"); | |
1182 | err = -ENODEV; | |
1183 | goto fail1; | |
1184 | } | |
1185 | ||
1186 | /* Ack and disable all Menelaus interrupts */ | |
1187 | menelaus_write_reg(MENELAUS_INT_ACK1, 0xff); | |
1188 | menelaus_write_reg(MENELAUS_INT_ACK2, 0xff); | |
1189 | menelaus_write_reg(MENELAUS_INT_MASK1, 0xff); | |
1190 | menelaus_write_reg(MENELAUS_INT_MASK2, 0xff); | |
1191 | menelaus->mask1 = 0xff; | |
1192 | menelaus->mask2 = 0xff; | |
1193 | ||
1194 | /* Set output buffer strengths */ | |
1195 | menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73); | |
1196 | ||
1197 | if (client->irq > 0) { | |
1198 | err = request_irq(client->irq, menelaus_irq, IRQF_DISABLED, | |
1199 | DRIVER_NAME, menelaus); | |
1200 | if (err) { | |
1201 | dev_dbg(&client->dev, "can't get IRQ %d, err %d", | |
1202 | client->irq, err); | |
1203 | goto fail1; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | mutex_init(&menelaus->lock); | |
1208 | INIT_WORK(&menelaus->work, menelaus_work); | |
1209 | ||
1210 | pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f); | |
1211 | ||
1212 | val = menelaus_read_reg(MENELAUS_VCORE_CTRL1); | |
1213 | if (val < 0) | |
1214 | goto fail2; | |
1215 | if (val & (1 << 7)) | |
1216 | menelaus->vcore_hw_mode = 1; | |
1217 | else | |
1218 | menelaus->vcore_hw_mode = 0; | |
1219 | ||
1220 | if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) { | |
1221 | err = menelaus_pdata->late_init(&client->dev); | |
1222 | if (err < 0) | |
1223 | goto fail2; | |
1224 | } | |
1225 | ||
1226 | menelaus_rtc_init(menelaus); | |
1227 | ||
1228 | return 0; | |
1229 | fail2: | |
1230 | free_irq(client->irq, menelaus); | |
1231 | flush_scheduled_work(); | |
1232 | fail1: | |
1233 | kfree(menelaus); | |
1234 | return err; | |
1235 | } | |
1236 | ||
1237 | static int __exit menelaus_remove(struct i2c_client *client) | |
1238 | { | |
1239 | struct menelaus_chip *menelaus = i2c_get_clientdata(client); | |
1240 | ||
1241 | free_irq(client->irq, menelaus); | |
1242 | kfree(menelaus); | |
1243 | i2c_set_clientdata(client, NULL); | |
1244 | the_menelaus = NULL; | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static struct i2c_driver menelaus_i2c_driver = { | |
1249 | .driver = { | |
1250 | .name = DRIVER_NAME, | |
1251 | }, | |
1252 | .probe = menelaus_probe, | |
1253 | .remove = __exit_p(menelaus_remove), | |
1254 | }; | |
1255 | ||
1256 | static int __init menelaus_init(void) | |
1257 | { | |
1258 | int res; | |
1259 | ||
1260 | res = i2c_add_driver(&menelaus_i2c_driver); | |
1261 | if (res < 0) { | |
1262 | pr_err("driver registration failed\n"); | |
1263 | return res; | |
1264 | } | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static void __exit menelaus_exit(void) | |
1270 | { | |
1271 | i2c_del_driver(&menelaus_i2c_driver); | |
1272 | ||
1273 | /* FIXME: Shutdown menelaus parts that can be shut down */ | |
1274 | } | |
1275 | ||
1276 | MODULE_AUTHOR("Texas Instruments, Inc. (and others)"); | |
1277 | MODULE_DESCRIPTION("I2C interface for Menelaus."); | |
1278 | MODULE_LICENSE("GPL"); | |
1279 | ||
1280 | module_init(menelaus_init); | |
1281 | module_exit(menelaus_exit); |