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authorTony Lindgren <tony@atomide.com>2007-07-17 07:06:09 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 13:23:15 -0400
commit0c4a59fed41bdd4c30ce0999a87f30a812f29ee2 (patch)
tree8e88b4fdf538afb7bc9d740765a1a49ac148ba32 /drivers/i2c/chips/menelaus.c
parent969529021a5c3df74ea8f10d329b2427e559a90f (diff)
OMAP: add TI TWL92330/Menelaus Power Management chip driver
Add Texas Instruments TWL92330/Menelaus Power Management chip driver. This includes voltage regulators, Dual slot memory card tranceivers and real-time clock(RTC). The support for RTC is integrated with this driver only; it is not separate module. Passes 'rtctest' on OMAP H4 EVM, other than lack of "periodic" (1/N second) IRQs. System wakeup alarms (from suspend-to-RAM) work too. The battery keeps the RTC active over power off, so once you set clock (rdate/ntpdate/etc, then "hwclock -w") then RTC_HCTOSYS at boot time will behave as expected. Cc: "Jean Delvare" <khali@linux-fr.org> Cc: "Tony Lindgren" <tony@atomide.com> Cc: "David Brownell" <david-b@pacbell.net> Signed-off-by: Trilok Soni <soni.trilok@gmail.com> Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/i2c/chips/menelaus.c')
-rw-r--r--drivers/i2c/chips/menelaus.c1281
1 files changed, 1281 insertions, 0 deletions
diff --git a/drivers/i2c/chips/menelaus.c b/drivers/i2c/chips/menelaus.c
new file mode 100644
index 000000000000..48a7e2f0bdd3
--- /dev/null
+++ b/drivers/i2c/chips/menelaus.c
@@ -0,0 +1,1281 @@
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
134static void menelaus_work(struct work_struct *_menelaus);
135
136struct 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
152static struct menelaus_chip *the_menelaus;
153
154static 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
166static 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
176static 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
190static 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
204static 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 */
213static 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 */
227static 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 */
245static 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 */
268int 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}
297EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
298
299int 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);
313out:
314 mutex_unlock(&the_menelaus->lock);
315 return ret;
316}
317EXPORT_SYMBOL(menelaus_set_slot_sel);
318
319int 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);
375out:
376 mutex_unlock(&the_menelaus->lock);
377 return ret;
378}
379EXPORT_SYMBOL(menelaus_set_mmc_slot);
380
381int 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}
405EXPORT_SYMBOL(menelaus_register_mmc_callback);
406
407void 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}
417EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
418
419struct menelaus_vtg {
420 const char *name;
421 u8 vtg_reg;
422 u8 vtg_shift;
423 u8 vtg_bits;
424 u8 mode_reg;
425};
426
427struct menelaus_vtg_value {
428 u16 vtg;
429 u16 val;
430};
431
432static 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;
455set_voltage:
456 ret = menelaus_write_reg(vtg->mode_reg, mode);
457out:
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
466static 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
486static 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
508int 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
531int 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);
563out:
564 mutex_unlock(&the_menelaus->lock);
565 return ret;
566}
567
568static 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
576static const struct menelaus_vtg_value vmem_values[] = {
577 { 1500, 0 },
578 { 1800, 1 },
579 { 1900, 2 },
580 { 2500, 3 },
581};
582
583int 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}
595EXPORT_SYMBOL(menelaus_set_vmem);
596
597static 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
605static const struct menelaus_vtg_value vio_values[] = {
606 { 1500, 0 },
607 { 1800, 1 },
608 { 2500, 2 },
609 { 2800, 3 },
610};
611
612int 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}
624EXPORT_SYMBOL(menelaus_set_vio);
625
626static 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
637static 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
645static 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
653int 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
675static const struct menelaus_vtg_value vmmc_values[] = {
676 { 1850, 0 },
677 { 2800, 1 },
678 { 3000, 2 },
679 { 3100, 3 },
680};
681
682static 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
690int 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}
702EXPORT_SYMBOL(menelaus_set_vmmc);
703
704
705static const struct menelaus_vtg_value vaux_values[] = {
706 { 1500, 0 },
707 { 1800, 1 },
708 { 2500, 2 },
709 { 2800, 3 },
710};
711
712static 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
720int 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}
732EXPORT_SYMBOL(menelaus_set_vaux);
733
734int menelaus_get_slot_pin_states(void)
735{
736 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
737}
738EXPORT_SYMBOL(menelaus_get_slot_pin_states);
739
740int 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);
761out:
762 mutex_unlock(&the_menelaus->lock);
763 return ret;
764}
765
766/*-----------------------------------------------------------------------*/
767
768/* Handles Menelaus interrupts. Does not run in interrupt context */
769static 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 */
805static 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
837static 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
852static 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;
889fail:
890 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
891 --regnum, status);
892 return status;
893}
894
895static 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
926static 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
950static 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
985static 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
1018static 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
1026static 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
1074static 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
1082static 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
1094static 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
1144static inline void menelaus_rtc_init(struct menelaus_chip *m)
1145{
1146 /* nothing */
1147}
1148
1149#endif
1150
1151/*-----------------------------------------------------------------------*/
1152
1153static struct i2c_driver menelaus_i2c_driver;
1154
1155static 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;
1229fail2:
1230 free_irq(client->irq, menelaus);
1231 flush_scheduled_work();
1232fail1:
1233 kfree(menelaus);
1234 return err;
1235}
1236
1237static 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
1248static 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
1256static 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
1269static 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
1276MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1277MODULE_DESCRIPTION("I2C interface for Menelaus.");
1278MODULE_LICENSE("GPL");
1279
1280module_init(menelaus_init);
1281module_exit(menelaus_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 05:09:21 -0500