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1// SPDX-License-Identifier: GPL-2.0-or-later
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
21#include <linux/module.h>
22#include <linux/i2c.h>
23#include <linux/interrupt.h>
24#include <linux/sched.h>
25#include <linux/mutex.h>
26#include <linux/workqueue.h>
27#include <linux/delay.h>
28#include <linux/rtc.h>
29#include <linux/bcd.h>
30#include <linux/slab.h>
31#include <linux/mfd/menelaus.h>
32#include <linux/gpio.h>
33
34#include <asm/mach/irq.h>
35
36
37#define DRIVER_NAME "menelaus"
38
39#define MENELAUS_I2C_ADDRESS 0x72
40
41#define MENELAUS_REV 0x01
42#define MENELAUS_VCORE_CTRL1 0x02
43#define MENELAUS_VCORE_CTRL2 0x03
44#define MENELAUS_VCORE_CTRL3 0x04
45#define MENELAUS_VCORE_CTRL4 0x05
46#define MENELAUS_VCORE_CTRL5 0x06
47#define MENELAUS_DCDC_CTRL1 0x07
48#define MENELAUS_DCDC_CTRL2 0x08
49#define MENELAUS_DCDC_CTRL3 0x09
50#define MENELAUS_LDO_CTRL1 0x0A
51#define MENELAUS_LDO_CTRL2 0x0B
52#define MENELAUS_LDO_CTRL3 0x0C
53#define MENELAUS_LDO_CTRL4 0x0D
54#define MENELAUS_LDO_CTRL5 0x0E
55#define MENELAUS_LDO_CTRL6 0x0F
56#define MENELAUS_LDO_CTRL7 0x10
57#define MENELAUS_LDO_CTRL8 0x11
58#define MENELAUS_SLEEP_CTRL1 0x12
59#define MENELAUS_SLEEP_CTRL2 0x13
60#define MENELAUS_DEVICE_OFF 0x14
61#define MENELAUS_OSC_CTRL 0x15
62#define MENELAUS_DETECT_CTRL 0x16
63#define MENELAUS_INT_MASK1 0x17
64#define MENELAUS_INT_MASK2 0x18
65#define MENELAUS_INT_STATUS1 0x19
66#define MENELAUS_INT_STATUS2 0x1A
67#define MENELAUS_INT_ACK1 0x1B
68#define MENELAUS_INT_ACK2 0x1C
69#define MENELAUS_GPIO_CTRL 0x1D
70#define MENELAUS_GPIO_IN 0x1E
71#define MENELAUS_GPIO_OUT 0x1F
72#define MENELAUS_BBSMS 0x20
73#define MENELAUS_RTC_CTRL 0x21
74#define MENELAUS_RTC_UPDATE 0x22
75#define MENELAUS_RTC_SEC 0x23
76#define MENELAUS_RTC_MIN 0x24
77#define MENELAUS_RTC_HR 0x25
78#define MENELAUS_RTC_DAY 0x26
79#define MENELAUS_RTC_MON 0x27
80#define MENELAUS_RTC_YR 0x28
81#define MENELAUS_RTC_WKDAY 0x29
82#define MENELAUS_RTC_AL_SEC 0x2A
83#define MENELAUS_RTC_AL_MIN 0x2B
84#define MENELAUS_RTC_AL_HR 0x2C
85#define MENELAUS_RTC_AL_DAY 0x2D
86#define MENELAUS_RTC_AL_MON 0x2E
87#define MENELAUS_RTC_AL_YR 0x2F
88#define MENELAUS_RTC_COMP_MSB 0x30
89#define MENELAUS_RTC_COMP_LSB 0x31
90#define MENELAUS_S1_PULL_EN 0x32
91#define MENELAUS_S1_PULL_DIR 0x33
92#define MENELAUS_S2_PULL_EN 0x34
93#define MENELAUS_S2_PULL_DIR 0x35
94#define MENELAUS_MCT_CTRL1 0x36
95#define MENELAUS_MCT_CTRL2 0x37
96#define MENELAUS_MCT_CTRL3 0x38
97#define MENELAUS_MCT_PIN_ST 0x39
98#define MENELAUS_DEBOUNCE1 0x3A
99
100#define IH_MENELAUS_IRQS 12
101#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */
102#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */
103#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */
104#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */
105#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */
106#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */
107#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */
108#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */
109#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */
110#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */
111#define MENELAUS_RTCERR_IRQ 10 /* RTC error */
112#define MENELAUS_PSHBTN_IRQ 11 /* Push button */
113#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */
114#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */
115#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */
116#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */
117
118/* VCORE_CTRL1 register */
119#define VCORE_CTRL1_BYP_COMP (1 << 5)
120#define VCORE_CTRL1_HW_NSW (1 << 7)
121
122/* GPIO_CTRL register */
123#define GPIO_CTRL_SLOTSELEN (1 << 5)
124#define GPIO_CTRL_SLPCTLEN (1 << 6)
125#define GPIO1_DIR_INPUT (1 << 0)
126#define GPIO2_DIR_INPUT (1 << 1)
127#define GPIO3_DIR_INPUT (1 << 2)
128
129/* MCT_CTRL1 register */
130#define MCT_CTRL1_S1_CMD_OD (1 << 2)
131#define MCT_CTRL1_S2_CMD_OD (1 << 3)
132
133/* MCT_CTRL2 register */
134#define MCT_CTRL2_VS2_SEL_D0 (1 << 0)
135#define MCT_CTRL2_VS2_SEL_D1 (1 << 1)
136#define MCT_CTRL2_S1CD_BUFEN (1 << 4)
137#define MCT_CTRL2_S2CD_BUFEN (1 << 5)
138#define MCT_CTRL2_S1CD_DBEN (1 << 6)
139#define MCT_CTRL2_S2CD_BEN (1 << 7)
140
141/* MCT_CTRL3 register */
142#define MCT_CTRL3_SLOT1_EN (1 << 0)
143#define MCT_CTRL3_SLOT2_EN (1 << 1)
144#define MCT_CTRL3_S1_AUTO_EN (1 << 2)
145#define MCT_CTRL3_S2_AUTO_EN (1 << 3)
146
147/* MCT_PIN_ST register */
148#define MCT_PIN_ST_S1_CD_ST (1 << 0)
149#define MCT_PIN_ST_S2_CD_ST (1 << 1)
150
151static void menelaus_work(struct work_struct *_menelaus);
152
153struct menelaus_chip {
154 struct mutex lock;
155 struct i2c_client *client;
156 struct work_struct work;
157#ifdef CONFIG_RTC_DRV_TWL92330
158 struct rtc_device *rtc;
159 u8 rtc_control;
160 unsigned uie:1;
161#endif
162 unsigned vcore_hw_mode:1;
163 u8 mask1, mask2;
164 void (*handlers[16])(struct menelaus_chip *);
165 void (*mmc_callback)(void *data, u8 mask);
166 void *mmc_callback_data;
167};
168
169static struct menelaus_chip *the_menelaus;
170
171static int menelaus_write_reg(int reg, u8 value)
172{
173 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
174
175 if (val < 0) {
176 pr_err(DRIVER_NAME ": write error");
177 return val;
178 }
179
180 return 0;
181}
182
183static int menelaus_read_reg(int reg)
184{
185 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
186
187 if (val < 0)
188 pr_err(DRIVER_NAME ": read error");
189
190 return val;
191}
192
193static int menelaus_enable_irq(int irq)
194{
195 if (irq > 7) {
196 irq -= 8;
197 the_menelaus->mask2 &= ~(1 << irq);
198 return menelaus_write_reg(MENELAUS_INT_MASK2,
199 the_menelaus->mask2);
200 } else {
201 the_menelaus->mask1 &= ~(1 << irq);
202 return menelaus_write_reg(MENELAUS_INT_MASK1,
203 the_menelaus->mask1);
204 }
205}
206
207static int menelaus_disable_irq(int irq)
208{
209 if (irq > 7) {
210 irq -= 8;
211 the_menelaus->mask2 |= (1 << irq);
212 return menelaus_write_reg(MENELAUS_INT_MASK2,
213 the_menelaus->mask2);
214 } else {
215 the_menelaus->mask1 |= (1 << irq);
216 return menelaus_write_reg(MENELAUS_INT_MASK1,
217 the_menelaus->mask1);
218 }
219}
220
221static int menelaus_ack_irq(int irq)
222{
223 if (irq > 7)
224 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
225 else
226 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
227}
228
229/* Adds a handler for an interrupt. Does not run in interrupt context */
230static int menelaus_add_irq_work(int irq,
231 void (*handler)(struct menelaus_chip *))
232{
233 int ret = 0;
234
235 mutex_lock(&the_menelaus->lock);
236 the_menelaus->handlers[irq] = handler;
237 ret = menelaus_enable_irq(irq);
238 mutex_unlock(&the_menelaus->lock);
239
240 return ret;
241}
242
243/* Removes handler for an interrupt */
244static int menelaus_remove_irq_work(int irq)
245{
246 int ret = 0;
247
248 mutex_lock(&the_menelaus->lock);
249 ret = menelaus_disable_irq(irq);
250 the_menelaus->handlers[irq] = NULL;
251 mutex_unlock(&the_menelaus->lock);
252
253 return ret;
254}
255
256/*
257 * Gets scheduled when a card detect interrupt happens. Note that in some cases
258 * this line is wired to card cover switch rather than the card detect switch
259 * in each slot. In this case the cards are not seen by menelaus.
260 * FIXME: Add handling for D1 too
261 */
262static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
263{
264 int reg;
265 unsigned char card_mask = 0;
266
267 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
268 if (reg < 0)
269 return;
270
271 if (!(reg & 0x1))
272 card_mask |= MCT_PIN_ST_S1_CD_ST;
273
274 if (!(reg & 0x2))
275 card_mask |= MCT_PIN_ST_S2_CD_ST;
276
277 if (menelaus_hw->mmc_callback)
278 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
279 card_mask);
280}
281
282/*
283 * Toggles the MMC slots between open-drain and push-pull mode.
284 */
285int menelaus_set_mmc_opendrain(int slot, int enable)
286{
287 int ret, val;
288
289 if (slot != 1 && slot != 2)
290 return -EINVAL;
291 mutex_lock(&the_menelaus->lock);
292 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
293 if (ret < 0) {
294 mutex_unlock(&the_menelaus->lock);
295 return ret;
296 }
297 val = ret;
298 if (slot == 1) {
299 if (enable)
300 val |= MCT_CTRL1_S1_CMD_OD;
301 else
302 val &= ~MCT_CTRL1_S1_CMD_OD;
303 } else {
304 if (enable)
305 val |= MCT_CTRL1_S2_CMD_OD;
306 else
307 val &= ~MCT_CTRL1_S2_CMD_OD;
308 }
309 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
310 mutex_unlock(&the_menelaus->lock);
311
312 return ret;
313}
314EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
315
316int menelaus_set_slot_sel(int enable)
317{
318 int ret;
319
320 mutex_lock(&the_menelaus->lock);
321 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
322 if (ret < 0)
323 goto out;
324 ret |= GPIO2_DIR_INPUT;
325 if (enable)
326 ret |= GPIO_CTRL_SLOTSELEN;
327 else
328 ret &= ~GPIO_CTRL_SLOTSELEN;
329 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
330out:
331 mutex_unlock(&the_menelaus->lock);
332 return ret;
333}
334EXPORT_SYMBOL(menelaus_set_slot_sel);
335
336int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
337{
338 int ret, val;
339
340 if (slot != 1 && slot != 2)
341 return -EINVAL;
342 if (power >= 3)
343 return -EINVAL;
344
345 mutex_lock(&the_menelaus->lock);
346
347 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
348 if (ret < 0)
349 goto out;
350 val = ret;
351 if (slot == 1) {
352 if (cd_en)
353 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;
354 else
355 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);
356 } else {
357 if (cd_en)
358 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;
359 else
360 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);
361 }
362 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
363 if (ret < 0)
364 goto out;
365
366 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
367 if (ret < 0)
368 goto out;
369 val = ret;
370 if (slot == 1) {
371 if (enable)
372 val |= MCT_CTRL3_SLOT1_EN;
373 else
374 val &= ~MCT_CTRL3_SLOT1_EN;
375 } else {
376 int b;
377
378 if (enable)
379 val |= MCT_CTRL3_SLOT2_EN;
380 else
381 val &= ~MCT_CTRL3_SLOT2_EN;
382 b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
383 b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1);
384 b |= power;
385 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
386 if (ret < 0)
387 goto out;
388 }
389 /* Disable autonomous shutdown */
390 val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN);
391 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
392out:
393 mutex_unlock(&the_menelaus->lock);
394 return ret;
395}
396EXPORT_SYMBOL(menelaus_set_mmc_slot);
397
398int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
399 void *data)
400{
401 int ret = 0;
402
403 the_menelaus->mmc_callback_data = data;
404 the_menelaus->mmc_callback = callback;
405 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
406 menelaus_mmc_cd_work);
407 if (ret < 0)
408 return ret;
409 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
410 menelaus_mmc_cd_work);
411 if (ret < 0)
412 return ret;
413 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
414 menelaus_mmc_cd_work);
415 if (ret < 0)
416 return ret;
417 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
418 menelaus_mmc_cd_work);
419
420 return ret;
421}
422EXPORT_SYMBOL(menelaus_register_mmc_callback);
423
424void menelaus_unregister_mmc_callback(void)
425{
426 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
427 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
428 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
429 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
430
431 the_menelaus->mmc_callback = NULL;
432 the_menelaus->mmc_callback_data = NULL;
433}
434EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
435
436struct menelaus_vtg {
437 const char *name;
438 u8 vtg_reg;
439 u8 vtg_shift;
440 u8 vtg_bits;
441 u8 mode_reg;
442};
443
444struct menelaus_vtg_value {
445 u16 vtg;
446 u16 val;
447};
448
449static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
450 int vtg_val, int mode)
451{
452 int val, ret;
453 struct i2c_client *c = the_menelaus->client;
454
455 mutex_lock(&the_menelaus->lock);
456
457 ret = menelaus_read_reg(vtg->vtg_reg);
458 if (ret < 0)
459 goto out;
460 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
461 val |= vtg_val << vtg->vtg_shift;
462
463 dev_dbg(&c->dev, "Setting voltage '%s'"
464 "to %d mV (reg 0x%02x, val 0x%02x)\n",
465 vtg->name, mV, vtg->vtg_reg, val);
466
467 ret = menelaus_write_reg(vtg->vtg_reg, val);
468 if (ret < 0)
469 goto out;
470 ret = menelaus_write_reg(vtg->mode_reg, mode);
471out:
472 mutex_unlock(&the_menelaus->lock);
473 if (ret == 0) {
474 /* Wait for voltage to stabilize */
475 msleep(1);
476 }
477 return ret;
478}
479
480static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
481 int n)
482{
483 int i;
484
485 for (i = 0; i < n; i++, tbl++)
486 if (tbl->vtg == vtg)
487 return tbl->val;
488 return -EINVAL;
489}
490
491/*
492 * Vcore can be programmed in two ways:
493 * SW-controlled: Required voltage is programmed into VCORE_CTRL1
494 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
495 * and VCORE_CTRL4
496 *
497 * Call correct 'set' function accordingly
498 */
499
500static const struct menelaus_vtg_value vcore_values[] = {
501 { 1000, 0 },
502 { 1025, 1 },
503 { 1050, 2 },
504 { 1075, 3 },
505 { 1100, 4 },
506 { 1125, 5 },
507 { 1150, 6 },
508 { 1175, 7 },
509 { 1200, 8 },
510 { 1225, 9 },
511 { 1250, 10 },
512 { 1275, 11 },
513 { 1300, 12 },
514 { 1325, 13 },
515 { 1350, 14 },
516 { 1375, 15 },
517 { 1400, 16 },
518 { 1425, 17 },
519 { 1450, 18 },
520};
521
522int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
523{
524 int fval, rval, val, ret;
525 struct i2c_client *c = the_menelaus->client;
526
527 rval = menelaus_get_vtg_value(roof_mV, vcore_values,
528 ARRAY_SIZE(vcore_values));
529 if (rval < 0)
530 return -EINVAL;
531 fval = menelaus_get_vtg_value(floor_mV, vcore_values,
532 ARRAY_SIZE(vcore_values));
533 if (fval < 0)
534 return -EINVAL;
535
536 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
537 floor_mV, roof_mV);
538
539 mutex_lock(&the_menelaus->lock);
540 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
541 if (ret < 0)
542 goto out;
543 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
544 if (ret < 0)
545 goto out;
546 if (!the_menelaus->vcore_hw_mode) {
547 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
548 /* HW mode, turn OFF byte comparator */
549 val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP);
550 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
551 the_menelaus->vcore_hw_mode = 1;
552 }
553 msleep(1);
554out:
555 mutex_unlock(&the_menelaus->lock);
556 return ret;
557}
558
559static const struct menelaus_vtg vmem_vtg = {
560 .name = "VMEM",
561 .vtg_reg = MENELAUS_LDO_CTRL1,
562 .vtg_shift = 0,
563 .vtg_bits = 2,
564 .mode_reg = MENELAUS_LDO_CTRL3,
565};
566
567static const struct menelaus_vtg_value vmem_values[] = {
568 { 1500, 0 },
569 { 1800, 1 },
570 { 1900, 2 },
571 { 2500, 3 },
572};
573
574int menelaus_set_vmem(unsigned int mV)
575{
576 int val;
577
578 if (mV == 0)
579 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
580
581 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
582 if (val < 0)
583 return -EINVAL;
584 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
585}
586EXPORT_SYMBOL(menelaus_set_vmem);
587
588static const struct menelaus_vtg vio_vtg = {
589 .name = "VIO",
590 .vtg_reg = MENELAUS_LDO_CTRL1,
591 .vtg_shift = 2,
592 .vtg_bits = 2,
593 .mode_reg = MENELAUS_LDO_CTRL4,
594};
595
596static const struct menelaus_vtg_value vio_values[] = {
597 { 1500, 0 },
598 { 1800, 1 },
599 { 2500, 2 },
600 { 2800, 3 },
601};
602
603int menelaus_set_vio(unsigned int mV)
604{
605 int val;
606
607 if (mV == 0)
608 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
609
610 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
611 if (val < 0)
612 return -EINVAL;
613 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
614}
615EXPORT_SYMBOL(menelaus_set_vio);
616
617static const struct menelaus_vtg_value vdcdc_values[] = {
618 { 1500, 0 },
619 { 1800, 1 },
620 { 2000, 2 },
621 { 2200, 3 },
622 { 2400, 4 },
623 { 2800, 5 },
624 { 3000, 6 },
625 { 3300, 7 },
626};
627
628static const struct menelaus_vtg vdcdc2_vtg = {
629 .name = "VDCDC2",
630 .vtg_reg = MENELAUS_DCDC_CTRL1,
631 .vtg_shift = 0,
632 .vtg_bits = 3,
633 .mode_reg = MENELAUS_DCDC_CTRL2,
634};
635
636static const struct menelaus_vtg vdcdc3_vtg = {
637 .name = "VDCDC3",
638 .vtg_reg = MENELAUS_DCDC_CTRL1,
639 .vtg_shift = 3,
640 .vtg_bits = 3,
641 .mode_reg = MENELAUS_DCDC_CTRL3,
642};
643
644int menelaus_set_vdcdc(int dcdc, unsigned int mV)
645{
646 const struct menelaus_vtg *vtg;
647 int val;
648
649 if (dcdc != 2 && dcdc != 3)
650 return -EINVAL;
651 if (dcdc == 2)
652 vtg = &vdcdc2_vtg;
653 else
654 vtg = &vdcdc3_vtg;
655
656 if (mV == 0)
657 return menelaus_set_voltage(vtg, 0, 0, 0);
658
659 val = menelaus_get_vtg_value(mV, vdcdc_values,
660 ARRAY_SIZE(vdcdc_values));
661 if (val < 0)
662 return -EINVAL;
663 return menelaus_set_voltage(vtg, mV, val, 0x03);
664}
665
666static const struct menelaus_vtg_value vmmc_values[] = {
667 { 1850, 0 },
668 { 2800, 1 },
669 { 3000, 2 },
670 { 3100, 3 },
671};
672
673static const struct menelaus_vtg vmmc_vtg = {
674 .name = "VMMC",
675 .vtg_reg = MENELAUS_LDO_CTRL1,
676 .vtg_shift = 6,
677 .vtg_bits = 2,
678 .mode_reg = MENELAUS_LDO_CTRL7,
679};
680
681int menelaus_set_vmmc(unsigned int mV)
682{
683 int val;
684
685 if (mV == 0)
686 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
687
688 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
689 if (val < 0)
690 return -EINVAL;
691 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
692}
693EXPORT_SYMBOL(menelaus_set_vmmc);
694
695
696static const struct menelaus_vtg_value vaux_values[] = {
697 { 1500, 0 },
698 { 1800, 1 },
699 { 2500, 2 },
700 { 2800, 3 },
701};
702
703static const struct menelaus_vtg vaux_vtg = {
704 .name = "VAUX",
705 .vtg_reg = MENELAUS_LDO_CTRL1,
706 .vtg_shift = 4,
707 .vtg_bits = 2,
708 .mode_reg = MENELAUS_LDO_CTRL6,
709};
710
711int menelaus_set_vaux(unsigned int mV)
712{
713 int val;
714
715 if (mV == 0)
716 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
717
718 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
719 if (val < 0)
720 return -EINVAL;
721 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
722}
723EXPORT_SYMBOL(menelaus_set_vaux);
724
725int menelaus_get_slot_pin_states(void)
726{
727 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
728}
729EXPORT_SYMBOL(menelaus_get_slot_pin_states);
730
731int menelaus_set_regulator_sleep(int enable, u32 val)
732{
733 int t, ret;
734 struct i2c_client *c = the_menelaus->client;
735
736 mutex_lock(&the_menelaus->lock);
737 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
738 if (ret < 0)
739 goto out;
740
741 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
742
743 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
744 if (ret < 0)
745 goto out;
746 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);
747 if (enable)
748 ret |= t;
749 else
750 ret &= ~t;
751 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
752out:
753 mutex_unlock(&the_menelaus->lock);
754 return ret;
755}
756
757/*-----------------------------------------------------------------------*/
758
759/* Handles Menelaus interrupts. Does not run in interrupt context */
760static void menelaus_work(struct work_struct *_menelaus)
761{
762 struct menelaus_chip *menelaus =
763 container_of(_menelaus, struct menelaus_chip, work);
764 void (*handler)(struct menelaus_chip *menelaus);
765
766 while (1) {
767 unsigned isr;
768
769 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
770 & ~menelaus->mask2) << 8;
771 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
772 & ~menelaus->mask1;
773 if (!isr)
774 break;
775
776 while (isr) {
777 int irq = fls(isr) - 1;
778 isr &= ~(1 << irq);
779
780 mutex_lock(&menelaus->lock);
781 menelaus_disable_irq(irq);
782 menelaus_ack_irq(irq);
783 handler = menelaus->handlers[irq];
784 if (handler)
785 handler(menelaus);
786 menelaus_enable_irq(irq);
787 mutex_unlock(&menelaus->lock);
788 }
789 }
790 enable_irq(menelaus->client->irq);
791}
792
793/*
794 * We cannot use I2C in interrupt context, so we just schedule work.
795 */
796static irqreturn_t menelaus_irq(int irq, void *_menelaus)
797{
798 struct menelaus_chip *menelaus = _menelaus;
799
800 disable_irq_nosync(irq);
801 (void)schedule_work(&menelaus->work);
802
803 return IRQ_HANDLED;
804}
805
806/*-----------------------------------------------------------------------*/
807
808/*
809 * The RTC needs to be set once, then it runs on backup battery power.
810 * It supports alarms, including system wake alarms (from some modes);
811 * and 1/second IRQs if requested.
812 */
813#ifdef CONFIG_RTC_DRV_TWL92330
814
815#define RTC_CTRL_RTC_EN (1 << 0)
816#define RTC_CTRL_AL_EN (1 << 1)
817#define RTC_CTRL_MODE12 (1 << 2)
818#define RTC_CTRL_EVERY_MASK (3 << 3)
819#define RTC_CTRL_EVERY_SEC (0 << 3)
820#define RTC_CTRL_EVERY_MIN (1 << 3)
821#define RTC_CTRL_EVERY_HR (2 << 3)
822#define RTC_CTRL_EVERY_DAY (3 << 3)
823
824#define RTC_UPDATE_EVERY 0x08
825
826#define RTC_HR_PM (1 << 7)
827
828static void menelaus_to_time(char *regs, struct rtc_time *t)
829{
830 t->tm_sec = bcd2bin(regs[0]);
831 t->tm_min = bcd2bin(regs[1]);
832 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
833 t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1;
834 if (regs[2] & RTC_HR_PM)
835 t->tm_hour += 12;
836 } else
837 t->tm_hour = bcd2bin(regs[2] & 0x3f);
838 t->tm_mday = bcd2bin(regs[3]);
839 t->tm_mon = bcd2bin(regs[4]) - 1;
840 t->tm_year = bcd2bin(regs[5]) + 100;
841}
842
843static int time_to_menelaus(struct rtc_time *t, int regnum)
844{
845 int hour, status;
846
847 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));
848 if (status < 0)
849 goto fail;
850
851 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));
852 if (status < 0)
853 goto fail;
854
855 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
856 hour = t->tm_hour + 1;
857 if (hour > 12)
858 hour = RTC_HR_PM | bin2bcd(hour - 12);
859 else
860 hour = bin2bcd(hour);
861 } else
862 hour = bin2bcd(t->tm_hour);
863 status = menelaus_write_reg(regnum++, hour);
864 if (status < 0)
865 goto fail;
866
867 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));
868 if (status < 0)
869 goto fail;
870
871 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));
872 if (status < 0)
873 goto fail;
874
875 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));
876 if (status < 0)
877 goto fail;
878
879 return 0;
880fail:
881 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
882 --regnum, status);
883 return status;
884}
885
886static int menelaus_read_time(struct device *dev, struct rtc_time *t)
887{
888 struct i2c_msg msg[2];
889 char regs[7];
890 int status;
891
892 /* block read date and time registers */
893 regs[0] = MENELAUS_RTC_SEC;
894
895 msg[0].addr = MENELAUS_I2C_ADDRESS;
896 msg[0].flags = 0;
897 msg[0].len = 1;
898 msg[0].buf = regs;
899
900 msg[1].addr = MENELAUS_I2C_ADDRESS;
901 msg[1].flags = I2C_M_RD;
902 msg[1].len = sizeof(regs);
903 msg[1].buf = regs;
904
905 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
906 if (status != 2) {
907 dev_err(dev, "%s error %d\n", "read", status);
908 return -EIO;
909 }
910
911 menelaus_to_time(regs, t);
912 t->tm_wday = bcd2bin(regs[6]);
913
914 return 0;
915}
916
917static int menelaus_set_time(struct device *dev, struct rtc_time *t)
918{
919 int status;
920
921 /* write date and time registers */
922 status = time_to_menelaus(t, MENELAUS_RTC_SEC);
923 if (status < 0)
924 return status;
925 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));
926 if (status < 0) {
927 dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
928 "err %d\n", MENELAUS_RTC_WKDAY, status);
929 return status;
930 }
931
932 /* now commit the write */
933 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
934 if (status < 0)
935 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
936 status);
937
938 return 0;
939}
940
941static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
942{
943 struct i2c_msg msg[2];
944 char regs[6];
945 int status;
946
947 /* block read alarm registers */
948 regs[0] = MENELAUS_RTC_AL_SEC;
949
950 msg[0].addr = MENELAUS_I2C_ADDRESS;
951 msg[0].flags = 0;
952 msg[0].len = 1;
953 msg[0].buf = regs;
954
955 msg[1].addr = MENELAUS_I2C_ADDRESS;
956 msg[1].flags = I2C_M_RD;
957 msg[1].len = sizeof(regs);
958 msg[1].buf = regs;
959
960 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
961 if (status != 2) {
962 dev_err(dev, "%s error %d\n", "alarm read", status);
963 return -EIO;
964 }
965
966 menelaus_to_time(regs, &w->time);
967
968 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
969
970 /* NOTE we *could* check if actually pending... */
971 w->pending = 0;
972
973 return 0;
974}
975
976static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
977{
978 int status;
979
980 if (the_menelaus->client->irq <= 0 && w->enabled)
981 return -ENODEV;
982
983 /* clear previous alarm enable */
984 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
985 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
986 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
987 the_menelaus->rtc_control);
988 if (status < 0)
989 return status;
990 }
991
992 /* write alarm registers */
993 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
994 if (status < 0)
995 return status;
996
997 /* enable alarm if requested */
998 if (w->enabled) {
999 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1000 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1001 the_menelaus->rtc_control);
1002 }
1003
1004 return status;
1005}
1006
1007#ifdef CONFIG_RTC_INTF_DEV
1008
1009static void menelaus_rtc_update_work(struct menelaus_chip *m)
1010{
1011 /* report 1/sec update */
1012 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1013}
1014
1015static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1016{
1017 int status;
1018
1019 if (the_menelaus->client->irq <= 0)
1020 return -ENOIOCTLCMD;
1021
1022 switch (cmd) {
1023 /* alarm IRQ */
1024 case RTC_AIE_ON:
1025 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1026 return 0;
1027 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1028 break;
1029 case RTC_AIE_OFF:
1030 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1031 return 0;
1032 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1033 break;
1034 /* 1/second "update" IRQ */
1035 case RTC_UIE_ON:
1036 if (the_menelaus->uie)
1037 return 0;
1038 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1039 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1040 menelaus_rtc_update_work);
1041 if (status == 0)
1042 the_menelaus->uie = 1;
1043 return status;
1044 case RTC_UIE_OFF:
1045 if (!the_menelaus->uie)
1046 return 0;
1047 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1048 if (status == 0)
1049 the_menelaus->uie = 0;
1050 return status;
1051 default:
1052 return -ENOIOCTLCMD;
1053 }
1054 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1055}
1056
1057#else
1058#define menelaus_ioctl NULL
1059#endif
1060
1061/* REVISIT no compensation register support ... */
1062
1063static const struct rtc_class_ops menelaus_rtc_ops = {
1064 .ioctl = menelaus_ioctl,
1065 .read_time = menelaus_read_time,
1066 .set_time = menelaus_set_time,
1067 .read_alarm = menelaus_read_alarm,
1068 .set_alarm = menelaus_set_alarm,
1069};
1070
1071static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1072{
1073 /* report alarm */
1074 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
1075
1076 /* then disable it; alarms are oneshot */
1077 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1078 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1079}
1080
1081static inline void menelaus_rtc_init(struct menelaus_chip *m)
1082{
1083 int alarm = (m->client->irq > 0);
1084 int err;
1085
1086 /* assume 32KDETEN pin is pulled high */
1087 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
1088 dev_dbg(&m->client->dev, "no 32k oscillator\n");
1089 return;
1090 }
1091
1092 m->rtc = devm_rtc_allocate_device(&m->client->dev);
1093 if (IS_ERR(m->rtc))
1094 return;
1095
1096 m->rtc->ops = &menelaus_rtc_ops;
1097
1098 /* support RTC alarm; it can issue wakeups */
1099 if (alarm) {
1100 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
1101 menelaus_rtc_alarm_work) < 0) {
1102 dev_err(&m->client->dev, "can't handle RTC alarm\n");
1103 return;
1104 }
1105 device_init_wakeup(&m->client->dev, 1);
1106 }
1107
1108 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
1109 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
1110 if (!(m->rtc_control & RTC_CTRL_RTC_EN)
1111 || (m->rtc_control & RTC_CTRL_AL_EN)
1112 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
1113 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
1114 dev_warn(&m->client->dev, "rtc clock needs setting\n");
1115 m->rtc_control |= RTC_CTRL_RTC_EN;
1116 }
1117 m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
1118 m->rtc_control &= ~RTC_CTRL_AL_EN;
1119 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
1120 }
1121
1122 err = rtc_register_device(m->rtc);
1123 if (err) {
1124 if (alarm) {
1125 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1126 device_init_wakeup(&m->client->dev, 0);
1127 }
1128 the_menelaus->rtc = NULL;
1129 }
1130}
1131
1132#else
1133
1134static inline void menelaus_rtc_init(struct menelaus_chip *m)
1135{
1136 /* nothing */
1137}
1138
1139#endif
1140
1141/*-----------------------------------------------------------------------*/
1142
1143static struct i2c_driver menelaus_i2c_driver;
1144
1145static int menelaus_probe(struct i2c_client *client,
1146 const struct i2c_device_id *id)
1147{
1148 struct menelaus_chip *menelaus;
1149 int rev = 0;
1150 int err = 0;
1151 struct menelaus_platform_data *menelaus_pdata =
1152 dev_get_platdata(&client->dev);
1153
1154 if (the_menelaus) {
1155 dev_dbg(&client->dev, "only one %s for now\n",
1156 DRIVER_NAME);
1157 return -ENODEV;
1158 }
1159
1160 menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL);
1161 if (!menelaus)
1162 return -ENOMEM;
1163
1164 i2c_set_clientdata(client, menelaus);
1165
1166 the_menelaus = menelaus;
1167 menelaus->client = client;
1168
1169 /* If a true probe check the device */
1170 rev = menelaus_read_reg(MENELAUS_REV);
1171 if (rev < 0) {
1172 pr_err(DRIVER_NAME ": device not found");
1173 return -ENODEV;
1174 }
1175
1176 /* Ack and disable all Menelaus interrupts */
1177 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
1178 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
1179 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
1180 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
1181 menelaus->mask1 = 0xff;
1182 menelaus->mask2 = 0xff;
1183
1184 /* Set output buffer strengths */
1185 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1186
1187 if (client->irq > 0) {
1188 err = request_irq(client->irq, menelaus_irq, 0,
1189 DRIVER_NAME, menelaus);
1190 if (err) {
1191 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
1192 client->irq, err);
1193 return err;
1194 }
1195 }
1196
1197 mutex_init(&menelaus->lock);
1198 INIT_WORK(&menelaus->work, menelaus_work);
1199
1200 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1201
1202 err = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1203 if (err < 0)
1204 goto fail;
1205 if (err & VCORE_CTRL1_HW_NSW)
1206 menelaus->vcore_hw_mode = 1;
1207 else
1208 menelaus->vcore_hw_mode = 0;
1209
1210 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1211 err = menelaus_pdata->late_init(&client->dev);
1212 if (err < 0)
1213 goto fail;
1214 }
1215
1216 menelaus_rtc_init(menelaus);
1217
1218 return 0;
1219fail:
1220 free_irq(client->irq, menelaus);
1221 flush_work(&menelaus->work);
1222 return err;
1223}
1224
1225static int menelaus_remove(struct i2c_client *client)
1226{
1227 struct menelaus_chip *menelaus = i2c_get_clientdata(client);
1228
1229 free_irq(client->irq, menelaus);
1230 flush_work(&menelaus->work);
1231 the_menelaus = NULL;
1232 return 0;
1233}
1234
1235static const struct i2c_device_id menelaus_id[] = {
1236 { "menelaus", 0 },
1237 { }
1238};
1239MODULE_DEVICE_TABLE(i2c, menelaus_id);
1240
1241static struct i2c_driver menelaus_i2c_driver = {
1242 .driver = {
1243 .name = DRIVER_NAME,
1244 },
1245 .probe = menelaus_probe,
1246 .remove = menelaus_remove,
1247 .id_table = menelaus_id,
1248};
1249
1250module_i2c_driver(menelaus_i2c_driver);
1251
1252MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1253MODULE_DESCRIPTION("I2C interface for Menelaus.");
1254MODULE_LICENSE("GPL");
1/*
2 * Copyright (C) 2004 Texas Instruments, Inc.
3 *
4 * Some parts based tps65010.c:
5 * Copyright (C) 2004 Texas Instruments and
6 * Copyright (C) 2004-2005 David Brownell
7 *
8 * Some parts based on tlv320aic24.c:
9 * Copyright (C) by Kai Svahn <kai.svahn@nokia.com>
10 *
11 * Changes for interrupt handling and clean-up by
12 * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com>
13 * Cleanup and generalized support for voltage setting by
14 * Juha Yrjola
15 * Added support for controlling VCORE and regulator sleep states,
16 * Amit Kucheria <amit.kucheria@nokia.com>
17 * Copyright (C) 2005, 2006 Nokia Corporation
18 *
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 */
33
34#include <linux/module.h>
35#include <linux/i2c.h>
36#include <linux/interrupt.h>
37#include <linux/sched.h>
38#include <linux/mutex.h>
39#include <linux/workqueue.h>
40#include <linux/delay.h>
41#include <linux/rtc.h>
42#include <linux/bcd.h>
43#include <linux/slab.h>
44#include <linux/mfd/menelaus.h>
45
46#include <asm/mach/irq.h>
47
48#include <asm/gpio.h>
49
50#define DRIVER_NAME "menelaus"
51
52#define MENELAUS_I2C_ADDRESS 0x72
53
54#define MENELAUS_REV 0x01
55#define MENELAUS_VCORE_CTRL1 0x02
56#define MENELAUS_VCORE_CTRL2 0x03
57#define MENELAUS_VCORE_CTRL3 0x04
58#define MENELAUS_VCORE_CTRL4 0x05
59#define MENELAUS_VCORE_CTRL5 0x06
60#define MENELAUS_DCDC_CTRL1 0x07
61#define MENELAUS_DCDC_CTRL2 0x08
62#define MENELAUS_DCDC_CTRL3 0x09
63#define MENELAUS_LDO_CTRL1 0x0A
64#define MENELAUS_LDO_CTRL2 0x0B
65#define MENELAUS_LDO_CTRL3 0x0C
66#define MENELAUS_LDO_CTRL4 0x0D
67#define MENELAUS_LDO_CTRL5 0x0E
68#define MENELAUS_LDO_CTRL6 0x0F
69#define MENELAUS_LDO_CTRL7 0x10
70#define MENELAUS_LDO_CTRL8 0x11
71#define MENELAUS_SLEEP_CTRL1 0x12
72#define MENELAUS_SLEEP_CTRL2 0x13
73#define MENELAUS_DEVICE_OFF 0x14
74#define MENELAUS_OSC_CTRL 0x15
75#define MENELAUS_DETECT_CTRL 0x16
76#define MENELAUS_INT_MASK1 0x17
77#define MENELAUS_INT_MASK2 0x18
78#define MENELAUS_INT_STATUS1 0x19
79#define MENELAUS_INT_STATUS2 0x1A
80#define MENELAUS_INT_ACK1 0x1B
81#define MENELAUS_INT_ACK2 0x1C
82#define MENELAUS_GPIO_CTRL 0x1D
83#define MENELAUS_GPIO_IN 0x1E
84#define MENELAUS_GPIO_OUT 0x1F
85#define MENELAUS_BBSMS 0x20
86#define MENELAUS_RTC_CTRL 0x21
87#define MENELAUS_RTC_UPDATE 0x22
88#define MENELAUS_RTC_SEC 0x23
89#define MENELAUS_RTC_MIN 0x24
90#define MENELAUS_RTC_HR 0x25
91#define MENELAUS_RTC_DAY 0x26
92#define MENELAUS_RTC_MON 0x27
93#define MENELAUS_RTC_YR 0x28
94#define MENELAUS_RTC_WKDAY 0x29
95#define MENELAUS_RTC_AL_SEC 0x2A
96#define MENELAUS_RTC_AL_MIN 0x2B
97#define MENELAUS_RTC_AL_HR 0x2C
98#define MENELAUS_RTC_AL_DAY 0x2D
99#define MENELAUS_RTC_AL_MON 0x2E
100#define MENELAUS_RTC_AL_YR 0x2F
101#define MENELAUS_RTC_COMP_MSB 0x30
102#define MENELAUS_RTC_COMP_LSB 0x31
103#define MENELAUS_S1_PULL_EN 0x32
104#define MENELAUS_S1_PULL_DIR 0x33
105#define MENELAUS_S2_PULL_EN 0x34
106#define MENELAUS_S2_PULL_DIR 0x35
107#define MENELAUS_MCT_CTRL1 0x36
108#define MENELAUS_MCT_CTRL2 0x37
109#define MENELAUS_MCT_CTRL3 0x38
110#define MENELAUS_MCT_PIN_ST 0x39
111#define MENELAUS_DEBOUNCE1 0x3A
112
113#define IH_MENELAUS_IRQS 12
114#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */
115#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */
116#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */
117#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */
118#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */
119#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */
120#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */
121#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */
122#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */
123#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */
124#define MENELAUS_RTCERR_IRQ 10 /* RTC error */
125#define MENELAUS_PSHBTN_IRQ 11 /* Push button */
126#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */
127#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */
128#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */
129#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */
130
131/* VCORE_CTRL1 register */
132#define VCORE_CTRL1_BYP_COMP (1 << 5)
133#define VCORE_CTRL1_HW_NSW (1 << 7)
134
135/* GPIO_CTRL register */
136#define GPIO_CTRL_SLOTSELEN (1 << 5)
137#define GPIO_CTRL_SLPCTLEN (1 << 6)
138#define GPIO1_DIR_INPUT (1 << 0)
139#define GPIO2_DIR_INPUT (1 << 1)
140#define GPIO3_DIR_INPUT (1 << 2)
141
142/* MCT_CTRL1 register */
143#define MCT_CTRL1_S1_CMD_OD (1 << 2)
144#define MCT_CTRL1_S2_CMD_OD (1 << 3)
145
146/* MCT_CTRL2 register */
147#define MCT_CTRL2_VS2_SEL_D0 (1 << 0)
148#define MCT_CTRL2_VS2_SEL_D1 (1 << 1)
149#define MCT_CTRL2_S1CD_BUFEN (1 << 4)
150#define MCT_CTRL2_S2CD_BUFEN (1 << 5)
151#define MCT_CTRL2_S1CD_DBEN (1 << 6)
152#define MCT_CTRL2_S2CD_BEN (1 << 7)
153
154/* MCT_CTRL3 register */
155#define MCT_CTRL3_SLOT1_EN (1 << 0)
156#define MCT_CTRL3_SLOT2_EN (1 << 1)
157#define MCT_CTRL3_S1_AUTO_EN (1 << 2)
158#define MCT_CTRL3_S2_AUTO_EN (1 << 3)
159
160/* MCT_PIN_ST register */
161#define MCT_PIN_ST_S1_CD_ST (1 << 0)
162#define MCT_PIN_ST_S2_CD_ST (1 << 1)
163
164static void menelaus_work(struct work_struct *_menelaus);
165
166struct menelaus_chip {
167 struct mutex lock;
168 struct i2c_client *client;
169 struct work_struct work;
170#ifdef CONFIG_RTC_DRV_TWL92330
171 struct rtc_device *rtc;
172 u8 rtc_control;
173 unsigned uie:1;
174#endif
175 unsigned vcore_hw_mode:1;
176 u8 mask1, mask2;
177 void (*handlers[16])(struct menelaus_chip *);
178 void (*mmc_callback)(void *data, u8 mask);
179 void *mmc_callback_data;
180};
181
182static struct menelaus_chip *the_menelaus;
183
184static int menelaus_write_reg(int reg, u8 value)
185{
186 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
187
188 if (val < 0) {
189 pr_err(DRIVER_NAME ": write error");
190 return val;
191 }
192
193 return 0;
194}
195
196static int menelaus_read_reg(int reg)
197{
198 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
199
200 if (val < 0)
201 pr_err(DRIVER_NAME ": read error");
202
203 return val;
204}
205
206static int menelaus_enable_irq(int irq)
207{
208 if (irq > 7) {
209 irq -= 8;
210 the_menelaus->mask2 &= ~(1 << irq);
211 return menelaus_write_reg(MENELAUS_INT_MASK2,
212 the_menelaus->mask2);
213 } else {
214 the_menelaus->mask1 &= ~(1 << irq);
215 return menelaus_write_reg(MENELAUS_INT_MASK1,
216 the_menelaus->mask1);
217 }
218}
219
220static int menelaus_disable_irq(int irq)
221{
222 if (irq > 7) {
223 irq -= 8;
224 the_menelaus->mask2 |= (1 << irq);
225 return menelaus_write_reg(MENELAUS_INT_MASK2,
226 the_menelaus->mask2);
227 } else {
228 the_menelaus->mask1 |= (1 << irq);
229 return menelaus_write_reg(MENELAUS_INT_MASK1,
230 the_menelaus->mask1);
231 }
232}
233
234static int menelaus_ack_irq(int irq)
235{
236 if (irq > 7)
237 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
238 else
239 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
240}
241
242/* Adds a handler for an interrupt. Does not run in interrupt context */
243static int menelaus_add_irq_work(int irq,
244 void (*handler)(struct menelaus_chip *))
245{
246 int ret = 0;
247
248 mutex_lock(&the_menelaus->lock);
249 the_menelaus->handlers[irq] = handler;
250 ret = menelaus_enable_irq(irq);
251 mutex_unlock(&the_menelaus->lock);
252
253 return ret;
254}
255
256/* Removes handler for an interrupt */
257static int menelaus_remove_irq_work(int irq)
258{
259 int ret = 0;
260
261 mutex_lock(&the_menelaus->lock);
262 ret = menelaus_disable_irq(irq);
263 the_menelaus->handlers[irq] = NULL;
264 mutex_unlock(&the_menelaus->lock);
265
266 return ret;
267}
268
269/*
270 * Gets scheduled when a card detect interrupt happens. Note that in some cases
271 * this line is wired to card cover switch rather than the card detect switch
272 * in each slot. In this case the cards are not seen by menelaus.
273 * FIXME: Add handling for D1 too
274 */
275static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
276{
277 int reg;
278 unsigned char card_mask = 0;
279
280 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
281 if (reg < 0)
282 return;
283
284 if (!(reg & 0x1))
285 card_mask |= MCT_PIN_ST_S1_CD_ST;
286
287 if (!(reg & 0x2))
288 card_mask |= MCT_PIN_ST_S2_CD_ST;
289
290 if (menelaus_hw->mmc_callback)
291 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
292 card_mask);
293}
294
295/*
296 * Toggles the MMC slots between open-drain and push-pull mode.
297 */
298int menelaus_set_mmc_opendrain(int slot, int enable)
299{
300 int ret, val;
301
302 if (slot != 1 && slot != 2)
303 return -EINVAL;
304 mutex_lock(&the_menelaus->lock);
305 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
306 if (ret < 0) {
307 mutex_unlock(&the_menelaus->lock);
308 return ret;
309 }
310 val = ret;
311 if (slot == 1) {
312 if (enable)
313 val |= MCT_CTRL1_S1_CMD_OD;
314 else
315 val &= ~MCT_CTRL1_S1_CMD_OD;
316 } else {
317 if (enable)
318 val |= MCT_CTRL1_S2_CMD_OD;
319 else
320 val &= ~MCT_CTRL1_S2_CMD_OD;
321 }
322 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
323 mutex_unlock(&the_menelaus->lock);
324
325 return ret;
326}
327EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
328
329int menelaus_set_slot_sel(int enable)
330{
331 int ret;
332
333 mutex_lock(&the_menelaus->lock);
334 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
335 if (ret < 0)
336 goto out;
337 ret |= GPIO2_DIR_INPUT;
338 if (enable)
339 ret |= GPIO_CTRL_SLOTSELEN;
340 else
341 ret &= ~GPIO_CTRL_SLOTSELEN;
342 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
343out:
344 mutex_unlock(&the_menelaus->lock);
345 return ret;
346}
347EXPORT_SYMBOL(menelaus_set_slot_sel);
348
349int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
350{
351 int ret, val;
352
353 if (slot != 1 && slot != 2)
354 return -EINVAL;
355 if (power >= 3)
356 return -EINVAL;
357
358 mutex_lock(&the_menelaus->lock);
359
360 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
361 if (ret < 0)
362 goto out;
363 val = ret;
364 if (slot == 1) {
365 if (cd_en)
366 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;
367 else
368 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);
369 } else {
370 if (cd_en)
371 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;
372 else
373 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);
374 }
375 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
376 if (ret < 0)
377 goto out;
378
379 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
380 if (ret < 0)
381 goto out;
382 val = ret;
383 if (slot == 1) {
384 if (enable)
385 val |= MCT_CTRL3_SLOT1_EN;
386 else
387 val &= ~MCT_CTRL3_SLOT1_EN;
388 } else {
389 int b;
390
391 if (enable)
392 val |= MCT_CTRL3_SLOT2_EN;
393 else
394 val &= ~MCT_CTRL3_SLOT2_EN;
395 b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
396 b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1);
397 b |= power;
398 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
399 if (ret < 0)
400 goto out;
401 }
402 /* Disable autonomous shutdown */
403 val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN);
404 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
405out:
406 mutex_unlock(&the_menelaus->lock);
407 return ret;
408}
409EXPORT_SYMBOL(menelaus_set_mmc_slot);
410
411int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
412 void *data)
413{
414 int ret = 0;
415
416 the_menelaus->mmc_callback_data = data;
417 the_menelaus->mmc_callback = callback;
418 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
419 menelaus_mmc_cd_work);
420 if (ret < 0)
421 return ret;
422 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
423 menelaus_mmc_cd_work);
424 if (ret < 0)
425 return ret;
426 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
427 menelaus_mmc_cd_work);
428 if (ret < 0)
429 return ret;
430 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
431 menelaus_mmc_cd_work);
432
433 return ret;
434}
435EXPORT_SYMBOL(menelaus_register_mmc_callback);
436
437void menelaus_unregister_mmc_callback(void)
438{
439 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
440 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
441 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
442 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
443
444 the_menelaus->mmc_callback = NULL;
445 the_menelaus->mmc_callback_data = NULL;
446}
447EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
448
449struct menelaus_vtg {
450 const char *name;
451 u8 vtg_reg;
452 u8 vtg_shift;
453 u8 vtg_bits;
454 u8 mode_reg;
455};
456
457struct menelaus_vtg_value {
458 u16 vtg;
459 u16 val;
460};
461
462static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
463 int vtg_val, int mode)
464{
465 int val, ret;
466 struct i2c_client *c = the_menelaus->client;
467
468 mutex_lock(&the_menelaus->lock);
469 if (!vtg)
470 goto set_voltage;
471
472 ret = menelaus_read_reg(vtg->vtg_reg);
473 if (ret < 0)
474 goto out;
475 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
476 val |= vtg_val << vtg->vtg_shift;
477
478 dev_dbg(&c->dev, "Setting voltage '%s'"
479 "to %d mV (reg 0x%02x, val 0x%02x)\n",
480 vtg->name, mV, vtg->vtg_reg, val);
481
482 ret = menelaus_write_reg(vtg->vtg_reg, val);
483 if (ret < 0)
484 goto out;
485set_voltage:
486 ret = menelaus_write_reg(vtg->mode_reg, mode);
487out:
488 mutex_unlock(&the_menelaus->lock);
489 if (ret == 0) {
490 /* Wait for voltage to stabilize */
491 msleep(1);
492 }
493 return ret;
494}
495
496static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
497 int n)
498{
499 int i;
500
501 for (i = 0; i < n; i++, tbl++)
502 if (tbl->vtg == vtg)
503 return tbl->val;
504 return -EINVAL;
505}
506
507/*
508 * Vcore can be programmed in two ways:
509 * SW-controlled: Required voltage is programmed into VCORE_CTRL1
510 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
511 * and VCORE_CTRL4
512 *
513 * Call correct 'set' function accordingly
514 */
515
516static const struct menelaus_vtg_value vcore_values[] = {
517 { 1000, 0 },
518 { 1025, 1 },
519 { 1050, 2 },
520 { 1075, 3 },
521 { 1100, 4 },
522 { 1125, 5 },
523 { 1150, 6 },
524 { 1175, 7 },
525 { 1200, 8 },
526 { 1225, 9 },
527 { 1250, 10 },
528 { 1275, 11 },
529 { 1300, 12 },
530 { 1325, 13 },
531 { 1350, 14 },
532 { 1375, 15 },
533 { 1400, 16 },
534 { 1425, 17 },
535 { 1450, 18 },
536};
537
538int menelaus_set_vcore_sw(unsigned int mV)
539{
540 int val, ret;
541 struct i2c_client *c = the_menelaus->client;
542
543 val = menelaus_get_vtg_value(mV, vcore_values,
544 ARRAY_SIZE(vcore_values));
545 if (val < 0)
546 return -EINVAL;
547
548 dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val);
549
550 /* Set SW mode and the voltage in one go. */
551 mutex_lock(&the_menelaus->lock);
552 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
553 if (ret == 0)
554 the_menelaus->vcore_hw_mode = 0;
555 mutex_unlock(&the_menelaus->lock);
556 msleep(1);
557
558 return ret;
559}
560
561int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
562{
563 int fval, rval, val, ret;
564 struct i2c_client *c = the_menelaus->client;
565
566 rval = menelaus_get_vtg_value(roof_mV, vcore_values,
567 ARRAY_SIZE(vcore_values));
568 if (rval < 0)
569 return -EINVAL;
570 fval = menelaus_get_vtg_value(floor_mV, vcore_values,
571 ARRAY_SIZE(vcore_values));
572 if (fval < 0)
573 return -EINVAL;
574
575 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
576 floor_mV, roof_mV);
577
578 mutex_lock(&the_menelaus->lock);
579 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
580 if (ret < 0)
581 goto out;
582 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
583 if (ret < 0)
584 goto out;
585 if (!the_menelaus->vcore_hw_mode) {
586 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
587 /* HW mode, turn OFF byte comparator */
588 val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP);
589 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
590 the_menelaus->vcore_hw_mode = 1;
591 }
592 msleep(1);
593out:
594 mutex_unlock(&the_menelaus->lock);
595 return ret;
596}
597
598static const struct menelaus_vtg vmem_vtg = {
599 .name = "VMEM",
600 .vtg_reg = MENELAUS_LDO_CTRL1,
601 .vtg_shift = 0,
602 .vtg_bits = 2,
603 .mode_reg = MENELAUS_LDO_CTRL3,
604};
605
606static const struct menelaus_vtg_value vmem_values[] = {
607 { 1500, 0 },
608 { 1800, 1 },
609 { 1900, 2 },
610 { 2500, 3 },
611};
612
613int menelaus_set_vmem(unsigned int mV)
614{
615 int val;
616
617 if (mV == 0)
618 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
619
620 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
621 if (val < 0)
622 return -EINVAL;
623 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
624}
625EXPORT_SYMBOL(menelaus_set_vmem);
626
627static const struct menelaus_vtg vio_vtg = {
628 .name = "VIO",
629 .vtg_reg = MENELAUS_LDO_CTRL1,
630 .vtg_shift = 2,
631 .vtg_bits = 2,
632 .mode_reg = MENELAUS_LDO_CTRL4,
633};
634
635static const struct menelaus_vtg_value vio_values[] = {
636 { 1500, 0 },
637 { 1800, 1 },
638 { 2500, 2 },
639 { 2800, 3 },
640};
641
642int menelaus_set_vio(unsigned int mV)
643{
644 int val;
645
646 if (mV == 0)
647 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
648
649 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
650 if (val < 0)
651 return -EINVAL;
652 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
653}
654EXPORT_SYMBOL(menelaus_set_vio);
655
656static const struct menelaus_vtg_value vdcdc_values[] = {
657 { 1500, 0 },
658 { 1800, 1 },
659 { 2000, 2 },
660 { 2200, 3 },
661 { 2400, 4 },
662 { 2800, 5 },
663 { 3000, 6 },
664 { 3300, 7 },
665};
666
667static const struct menelaus_vtg vdcdc2_vtg = {
668 .name = "VDCDC2",
669 .vtg_reg = MENELAUS_DCDC_CTRL1,
670 .vtg_shift = 0,
671 .vtg_bits = 3,
672 .mode_reg = MENELAUS_DCDC_CTRL2,
673};
674
675static const struct menelaus_vtg vdcdc3_vtg = {
676 .name = "VDCDC3",
677 .vtg_reg = MENELAUS_DCDC_CTRL1,
678 .vtg_shift = 3,
679 .vtg_bits = 3,
680 .mode_reg = MENELAUS_DCDC_CTRL3,
681};
682
683int menelaus_set_vdcdc(int dcdc, unsigned int mV)
684{
685 const struct menelaus_vtg *vtg;
686 int val;
687
688 if (dcdc != 2 && dcdc != 3)
689 return -EINVAL;
690 if (dcdc == 2)
691 vtg = &vdcdc2_vtg;
692 else
693 vtg = &vdcdc3_vtg;
694
695 if (mV == 0)
696 return menelaus_set_voltage(vtg, 0, 0, 0);
697
698 val = menelaus_get_vtg_value(mV, vdcdc_values,
699 ARRAY_SIZE(vdcdc_values));
700 if (val < 0)
701 return -EINVAL;
702 return menelaus_set_voltage(vtg, mV, val, 0x03);
703}
704
705static const struct menelaus_vtg_value vmmc_values[] = {
706 { 1850, 0 },
707 { 2800, 1 },
708 { 3000, 2 },
709 { 3100, 3 },
710};
711
712static const struct menelaus_vtg vmmc_vtg = {
713 .name = "VMMC",
714 .vtg_reg = MENELAUS_LDO_CTRL1,
715 .vtg_shift = 6,
716 .vtg_bits = 2,
717 .mode_reg = MENELAUS_LDO_CTRL7,
718};
719
720int menelaus_set_vmmc(unsigned int mV)
721{
722 int val;
723
724 if (mV == 0)
725 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
726
727 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
728 if (val < 0)
729 return -EINVAL;
730 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
731}
732EXPORT_SYMBOL(menelaus_set_vmmc);
733
734
735static const struct menelaus_vtg_value vaux_values[] = {
736 { 1500, 0 },
737 { 1800, 1 },
738 { 2500, 2 },
739 { 2800, 3 },
740};
741
742static const struct menelaus_vtg vaux_vtg = {
743 .name = "VAUX",
744 .vtg_reg = MENELAUS_LDO_CTRL1,
745 .vtg_shift = 4,
746 .vtg_bits = 2,
747 .mode_reg = MENELAUS_LDO_CTRL6,
748};
749
750int menelaus_set_vaux(unsigned int mV)
751{
752 int val;
753
754 if (mV == 0)
755 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
756
757 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
758 if (val < 0)
759 return -EINVAL;
760 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
761}
762EXPORT_SYMBOL(menelaus_set_vaux);
763
764int menelaus_get_slot_pin_states(void)
765{
766 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
767}
768EXPORT_SYMBOL(menelaus_get_slot_pin_states);
769
770int menelaus_set_regulator_sleep(int enable, u32 val)
771{
772 int t, ret;
773 struct i2c_client *c = the_menelaus->client;
774
775 mutex_lock(&the_menelaus->lock);
776 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
777 if (ret < 0)
778 goto out;
779
780 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
781
782 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
783 if (ret < 0)
784 goto out;
785 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);
786 if (enable)
787 ret |= t;
788 else
789 ret &= ~t;
790 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
791out:
792 mutex_unlock(&the_menelaus->lock);
793 return ret;
794}
795
796/*-----------------------------------------------------------------------*/
797
798/* Handles Menelaus interrupts. Does not run in interrupt context */
799static void menelaus_work(struct work_struct *_menelaus)
800{
801 struct menelaus_chip *menelaus =
802 container_of(_menelaus, struct menelaus_chip, work);
803 void (*handler)(struct menelaus_chip *menelaus);
804
805 while (1) {
806 unsigned isr;
807
808 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
809 & ~menelaus->mask2) << 8;
810 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
811 & ~menelaus->mask1;
812 if (!isr)
813 break;
814
815 while (isr) {
816 int irq = fls(isr) - 1;
817 isr &= ~(1 << irq);
818
819 mutex_lock(&menelaus->lock);
820 menelaus_disable_irq(irq);
821 menelaus_ack_irq(irq);
822 handler = menelaus->handlers[irq];
823 if (handler)
824 handler(menelaus);
825 menelaus_enable_irq(irq);
826 mutex_unlock(&menelaus->lock);
827 }
828 }
829 enable_irq(menelaus->client->irq);
830}
831
832/*
833 * We cannot use I2C in interrupt context, so we just schedule work.
834 */
835static irqreturn_t menelaus_irq(int irq, void *_menelaus)
836{
837 struct menelaus_chip *menelaus = _menelaus;
838
839 disable_irq_nosync(irq);
840 (void)schedule_work(&menelaus->work);
841
842 return IRQ_HANDLED;
843}
844
845/*-----------------------------------------------------------------------*/
846
847/*
848 * The RTC needs to be set once, then it runs on backup battery power.
849 * It supports alarms, including system wake alarms (from some modes);
850 * and 1/second IRQs if requested.
851 */
852#ifdef CONFIG_RTC_DRV_TWL92330
853
854#define RTC_CTRL_RTC_EN (1 << 0)
855#define RTC_CTRL_AL_EN (1 << 1)
856#define RTC_CTRL_MODE12 (1 << 2)
857#define RTC_CTRL_EVERY_MASK (3 << 3)
858#define RTC_CTRL_EVERY_SEC (0 << 3)
859#define RTC_CTRL_EVERY_MIN (1 << 3)
860#define RTC_CTRL_EVERY_HR (2 << 3)
861#define RTC_CTRL_EVERY_DAY (3 << 3)
862
863#define RTC_UPDATE_EVERY 0x08
864
865#define RTC_HR_PM (1 << 7)
866
867static void menelaus_to_time(char *regs, struct rtc_time *t)
868{
869 t->tm_sec = bcd2bin(regs[0]);
870 t->tm_min = bcd2bin(regs[1]);
871 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
872 t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1;
873 if (regs[2] & RTC_HR_PM)
874 t->tm_hour += 12;
875 } else
876 t->tm_hour = bcd2bin(regs[2] & 0x3f);
877 t->tm_mday = bcd2bin(regs[3]);
878 t->tm_mon = bcd2bin(regs[4]) - 1;
879 t->tm_year = bcd2bin(regs[5]) + 100;
880}
881
882static int time_to_menelaus(struct rtc_time *t, int regnum)
883{
884 int hour, status;
885
886 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));
887 if (status < 0)
888 goto fail;
889
890 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));
891 if (status < 0)
892 goto fail;
893
894 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
895 hour = t->tm_hour + 1;
896 if (hour > 12)
897 hour = RTC_HR_PM | bin2bcd(hour - 12);
898 else
899 hour = bin2bcd(hour);
900 } else
901 hour = bin2bcd(t->tm_hour);
902 status = menelaus_write_reg(regnum++, hour);
903 if (status < 0)
904 goto fail;
905
906 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));
907 if (status < 0)
908 goto fail;
909
910 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));
911 if (status < 0)
912 goto fail;
913
914 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));
915 if (status < 0)
916 goto fail;
917
918 return 0;
919fail:
920 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
921 --regnum, status);
922 return status;
923}
924
925static int menelaus_read_time(struct device *dev, struct rtc_time *t)
926{
927 struct i2c_msg msg[2];
928 char regs[7];
929 int status;
930
931 /* block read date and time registers */
932 regs[0] = MENELAUS_RTC_SEC;
933
934 msg[0].addr = MENELAUS_I2C_ADDRESS;
935 msg[0].flags = 0;
936 msg[0].len = 1;
937 msg[0].buf = regs;
938
939 msg[1].addr = MENELAUS_I2C_ADDRESS;
940 msg[1].flags = I2C_M_RD;
941 msg[1].len = sizeof(regs);
942 msg[1].buf = regs;
943
944 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
945 if (status != 2) {
946 dev_err(dev, "%s error %d\n", "read", status);
947 return -EIO;
948 }
949
950 menelaus_to_time(regs, t);
951 t->tm_wday = bcd2bin(regs[6]);
952
953 return 0;
954}
955
956static int menelaus_set_time(struct device *dev, struct rtc_time *t)
957{
958 int status;
959
960 /* write date and time registers */
961 status = time_to_menelaus(t, MENELAUS_RTC_SEC);
962 if (status < 0)
963 return status;
964 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));
965 if (status < 0) {
966 dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
967 "err %d\n", MENELAUS_RTC_WKDAY, status);
968 return status;
969 }
970
971 /* now commit the write */
972 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
973 if (status < 0)
974 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
975 status);
976
977 return 0;
978}
979
980static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
981{
982 struct i2c_msg msg[2];
983 char regs[6];
984 int status;
985
986 /* block read alarm registers */
987 regs[0] = MENELAUS_RTC_AL_SEC;
988
989 msg[0].addr = MENELAUS_I2C_ADDRESS;
990 msg[0].flags = 0;
991 msg[0].len = 1;
992 msg[0].buf = regs;
993
994 msg[1].addr = MENELAUS_I2C_ADDRESS;
995 msg[1].flags = I2C_M_RD;
996 msg[1].len = sizeof(regs);
997 msg[1].buf = regs;
998
999 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
1000 if (status != 2) {
1001 dev_err(dev, "%s error %d\n", "alarm read", status);
1002 return -EIO;
1003 }
1004
1005 menelaus_to_time(regs, &w->time);
1006
1007 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
1008
1009 /* NOTE we *could* check if actually pending... */
1010 w->pending = 0;
1011
1012 return 0;
1013}
1014
1015static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
1016{
1017 int status;
1018
1019 if (the_menelaus->client->irq <= 0 && w->enabled)
1020 return -ENODEV;
1021
1022 /* clear previous alarm enable */
1023 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
1024 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1025 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1026 the_menelaus->rtc_control);
1027 if (status < 0)
1028 return status;
1029 }
1030
1031 /* write alarm registers */
1032 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
1033 if (status < 0)
1034 return status;
1035
1036 /* enable alarm if requested */
1037 if (w->enabled) {
1038 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1039 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1040 the_menelaus->rtc_control);
1041 }
1042
1043 return status;
1044}
1045
1046#ifdef CONFIG_RTC_INTF_DEV
1047
1048static void menelaus_rtc_update_work(struct menelaus_chip *m)
1049{
1050 /* report 1/sec update */
1051 local_irq_disable();
1052 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1053 local_irq_enable();
1054}
1055
1056static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1057{
1058 int status;
1059
1060 if (the_menelaus->client->irq <= 0)
1061 return -ENOIOCTLCMD;
1062
1063 switch (cmd) {
1064 /* alarm IRQ */
1065 case RTC_AIE_ON:
1066 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1067 return 0;
1068 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1069 break;
1070 case RTC_AIE_OFF:
1071 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1072 return 0;
1073 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1074 break;
1075 /* 1/second "update" IRQ */
1076 case RTC_UIE_ON:
1077 if (the_menelaus->uie)
1078 return 0;
1079 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1080 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1081 menelaus_rtc_update_work);
1082 if (status == 0)
1083 the_menelaus->uie = 1;
1084 return status;
1085 case RTC_UIE_OFF:
1086 if (!the_menelaus->uie)
1087 return 0;
1088 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1089 if (status == 0)
1090 the_menelaus->uie = 0;
1091 return status;
1092 default:
1093 return -ENOIOCTLCMD;
1094 }
1095 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1096}
1097
1098#else
1099#define menelaus_ioctl NULL
1100#endif
1101
1102/* REVISIT no compensation register support ... */
1103
1104static const struct rtc_class_ops menelaus_rtc_ops = {
1105 .ioctl = menelaus_ioctl,
1106 .read_time = menelaus_read_time,
1107 .set_time = menelaus_set_time,
1108 .read_alarm = menelaus_read_alarm,
1109 .set_alarm = menelaus_set_alarm,
1110};
1111
1112static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1113{
1114 /* report alarm */
1115 local_irq_disable();
1116 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
1117 local_irq_enable();
1118
1119 /* then disable it; alarms are oneshot */
1120 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1121 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1122}
1123
1124static inline void menelaus_rtc_init(struct menelaus_chip *m)
1125{
1126 int alarm = (m->client->irq > 0);
1127
1128 /* assume 32KDETEN pin is pulled high */
1129 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
1130 dev_dbg(&m->client->dev, "no 32k oscillator\n");
1131 return;
1132 }
1133
1134 /* support RTC alarm; it can issue wakeups */
1135 if (alarm) {
1136 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
1137 menelaus_rtc_alarm_work) < 0) {
1138 dev_err(&m->client->dev, "can't handle RTC alarm\n");
1139 return;
1140 }
1141 device_init_wakeup(&m->client->dev, 1);
1142 }
1143
1144 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
1145 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
1146 if (!(m->rtc_control & RTC_CTRL_RTC_EN)
1147 || (m->rtc_control & RTC_CTRL_AL_EN)
1148 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
1149 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
1150 dev_warn(&m->client->dev, "rtc clock needs setting\n");
1151 m->rtc_control |= RTC_CTRL_RTC_EN;
1152 }
1153 m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
1154 m->rtc_control &= ~RTC_CTRL_AL_EN;
1155 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
1156 }
1157
1158 m->rtc = rtc_device_register(DRIVER_NAME,
1159 &m->client->dev,
1160 &menelaus_rtc_ops, THIS_MODULE);
1161 if (IS_ERR(m->rtc)) {
1162 if (alarm) {
1163 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1164 device_init_wakeup(&m->client->dev, 0);
1165 }
1166 dev_err(&m->client->dev, "can't register RTC: %d\n",
1167 (int) PTR_ERR(m->rtc));
1168 the_menelaus->rtc = NULL;
1169 }
1170}
1171
1172#else
1173
1174static inline void menelaus_rtc_init(struct menelaus_chip *m)
1175{
1176 /* nothing */
1177}
1178
1179#endif
1180
1181/*-----------------------------------------------------------------------*/
1182
1183static struct i2c_driver menelaus_i2c_driver;
1184
1185static int menelaus_probe(struct i2c_client *client,
1186 const struct i2c_device_id *id)
1187{
1188 struct menelaus_chip *menelaus;
1189 int rev = 0, val;
1190 int err = 0;
1191 struct menelaus_platform_data *menelaus_pdata =
1192 dev_get_platdata(&client->dev);
1193
1194 if (the_menelaus) {
1195 dev_dbg(&client->dev, "only one %s for now\n",
1196 DRIVER_NAME);
1197 return -ENODEV;
1198 }
1199
1200 menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL);
1201 if (!menelaus)
1202 return -ENOMEM;
1203
1204 i2c_set_clientdata(client, menelaus);
1205
1206 the_menelaus = menelaus;
1207 menelaus->client = client;
1208
1209 /* If a true probe check the device */
1210 rev = menelaus_read_reg(MENELAUS_REV);
1211 if (rev < 0) {
1212 pr_err(DRIVER_NAME ": device not found");
1213 return -ENODEV;
1214 }
1215
1216 /* Ack and disable all Menelaus interrupts */
1217 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
1218 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
1219 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
1220 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
1221 menelaus->mask1 = 0xff;
1222 menelaus->mask2 = 0xff;
1223
1224 /* Set output buffer strengths */
1225 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1226
1227 if (client->irq > 0) {
1228 err = request_irq(client->irq, menelaus_irq, 0,
1229 DRIVER_NAME, menelaus);
1230 if (err) {
1231 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
1232 client->irq, err);
1233 return err;
1234 }
1235 }
1236
1237 mutex_init(&menelaus->lock);
1238 INIT_WORK(&menelaus->work, menelaus_work);
1239
1240 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1241
1242 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1243 if (val < 0)
1244 goto fail;
1245 if (val & (1 << 7))
1246 menelaus->vcore_hw_mode = 1;
1247 else
1248 menelaus->vcore_hw_mode = 0;
1249
1250 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1251 err = menelaus_pdata->late_init(&client->dev);
1252 if (err < 0)
1253 goto fail;
1254 }
1255
1256 menelaus_rtc_init(menelaus);
1257
1258 return 0;
1259fail:
1260 free_irq(client->irq, menelaus);
1261 flush_work(&menelaus->work);
1262 return err;
1263}
1264
1265static int __exit menelaus_remove(struct i2c_client *client)
1266{
1267 struct menelaus_chip *menelaus = i2c_get_clientdata(client);
1268
1269 free_irq(client->irq, menelaus);
1270 flush_work(&menelaus->work);
1271 the_menelaus = NULL;
1272 return 0;
1273}
1274
1275static const struct i2c_device_id menelaus_id[] = {
1276 { "menelaus", 0 },
1277 { }
1278};
1279MODULE_DEVICE_TABLE(i2c, menelaus_id);
1280
1281static struct i2c_driver menelaus_i2c_driver = {
1282 .driver = {
1283 .name = DRIVER_NAME,
1284 },
1285 .probe = menelaus_probe,
1286 .remove = __exit_p(menelaus_remove),
1287 .id_table = menelaus_id,
1288};
1289
1290static int __init menelaus_init(void)
1291{
1292 int res;
1293
1294 res = i2c_add_driver(&menelaus_i2c_driver);
1295 if (res < 0) {
1296 pr_err(DRIVER_NAME ": driver registration failed\n");
1297 return res;
1298 }
1299
1300 return 0;
1301}
1302
1303static void __exit menelaus_exit(void)
1304{
1305 i2c_del_driver(&menelaus_i2c_driver);
1306
1307 /* FIXME: Shutdown menelaus parts that can be shut down */
1308}
1309
1310MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1311MODULE_DESCRIPTION("I2C interface for Menelaus.");
1312MODULE_LICENSE("GPL");
1313
1314module_init(menelaus_init);
1315module_exit(menelaus_exit);