2 * Copyright (C) 2004 Texas Instruments, Inc.
4 * Some parts based tps65010.c:
5 * Copyright (C) 2004 Texas Instruments and
6 * Copyright (C) 2004-2005 David Brownell
8 * Some parts based on tlv320aic24.c:
9 * Copyright (C) by Kai Svahn <kai.svahn@nokia.com>
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
15 * Added support for controlling VCORE and regulator sleep states,
16 * Amit Kucheria <amit.kucheria@nokia.com>
17 * Copyright (C) 2005, 2006 Nokia Corporation
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.
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.
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
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>
46 #include <asm/mach/irq.h>
50 #define DRIVER_NAME "menelaus"
52 #define MENELAUS_I2C_ADDRESS 0x72
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
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 */
131 /* VCORE_CTRL1 register */
132 #define VCORE_CTRL1_BYP_COMP (1 << 5)
133 #define VCORE_CTRL1_HW_NSW (1 << 7)
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)
142 /* MCT_CTRL1 register */
143 #define MCT_CTRL1_S1_CMD_OD (1 << 2)
144 #define MCT_CTRL1_S2_CMD_OD (1 << 3)
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)
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)
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)
164 static void menelaus_work(struct work_struct *_menelaus);
166 struct menelaus_chip {
168 struct i2c_client *client;
169 struct work_struct work;
170 #ifdef CONFIG_RTC_DRV_TWL92330
171 struct rtc_device *rtc;
175 unsigned vcore_hw_mode:1;
177 void (*handlers[16])(struct menelaus_chip *);
178 void (*mmc_callback)(void *data, u8 mask);
179 void *mmc_callback_data;
182 static struct menelaus_chip *the_menelaus;
184 static int menelaus_write_reg(int reg, u8 value)
186 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
189 pr_err(DRIVER_NAME ": write error");
196 static int menelaus_read_reg(int reg)
198 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
201 pr_err(DRIVER_NAME ": read error");
206 static int menelaus_enable_irq(int irq)
210 the_menelaus->mask2 &= ~(1 << irq);
211 return menelaus_write_reg(MENELAUS_INT_MASK2,
212 the_menelaus->mask2);
214 the_menelaus->mask1 &= ~(1 << irq);
215 return menelaus_write_reg(MENELAUS_INT_MASK1,
216 the_menelaus->mask1);
220 static int menelaus_disable_irq(int irq)
224 the_menelaus->mask2 |= (1 << irq);
225 return menelaus_write_reg(MENELAUS_INT_MASK2,
226 the_menelaus->mask2);
228 the_menelaus->mask1 |= (1 << irq);
229 return menelaus_write_reg(MENELAUS_INT_MASK1,
230 the_menelaus->mask1);
234 static int menelaus_ack_irq(int irq)
237 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
239 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
242 /* Adds a handler for an interrupt. Does not run in interrupt context */
243 static int menelaus_add_irq_work(int irq,
244 void (*handler)(struct menelaus_chip *))
248 mutex_lock(&the_menelaus->lock);
249 the_menelaus->handlers[irq] = handler;
250 ret = menelaus_enable_irq(irq);
251 mutex_unlock(&the_menelaus->lock);
256 /* Removes handler for an interrupt */
257 static int menelaus_remove_irq_work(int irq)
261 mutex_lock(&the_menelaus->lock);
262 ret = menelaus_disable_irq(irq);
263 the_menelaus->handlers[irq] = NULL;
264 mutex_unlock(&the_menelaus->lock);
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
275 static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
278 unsigned char card_mask = 0;
280 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
285 card_mask |= MCT_PIN_ST_S1_CD_ST;
288 card_mask |= MCT_PIN_ST_S2_CD_ST;
290 if (menelaus_hw->mmc_callback)
291 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
296 * Toggles the MMC slots between open-drain and push-pull mode.
298 int menelaus_set_mmc_opendrain(int slot, int enable)
302 if (slot != 1 && slot != 2)
304 mutex_lock(&the_menelaus->lock);
305 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
307 mutex_unlock(&the_menelaus->lock);
313 val |= MCT_CTRL1_S1_CMD_OD;
315 val &= ~MCT_CTRL1_S1_CMD_OD;
318 val |= MCT_CTRL1_S2_CMD_OD;
320 val &= ~MCT_CTRL1_S2_CMD_OD;
322 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
323 mutex_unlock(&the_menelaus->lock);
327 EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
329 int menelaus_set_slot_sel(int enable)
333 mutex_lock(&the_menelaus->lock);
334 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
337 ret |= GPIO2_DIR_INPUT;
339 ret |= GPIO_CTRL_SLOTSELEN;
341 ret &= ~GPIO_CTRL_SLOTSELEN;
342 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
344 mutex_unlock(&the_menelaus->lock);
347 EXPORT_SYMBOL(menelaus_set_slot_sel);
349 int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
353 if (slot != 1 && slot != 2)
358 mutex_lock(&the_menelaus->lock);
360 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
366 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;
368 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);
371 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;
373 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);
375 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
379 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
385 val |= MCT_CTRL3_SLOT1_EN;
387 val &= ~MCT_CTRL3_SLOT1_EN;
392 val |= MCT_CTRL3_SLOT2_EN;
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);
398 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
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);
406 mutex_unlock(&the_menelaus->lock);
409 EXPORT_SYMBOL(menelaus_set_mmc_slot);
411 int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
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);
422 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
423 menelaus_mmc_cd_work);
426 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
427 menelaus_mmc_cd_work);
430 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
431 menelaus_mmc_cd_work);
435 EXPORT_SYMBOL(menelaus_register_mmc_callback);
437 void menelaus_unregister_mmc_callback(void)
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);
444 the_menelaus->mmc_callback = NULL;
445 the_menelaus->mmc_callback_data = NULL;
447 EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
449 struct menelaus_vtg {
457 struct menelaus_vtg_value {
462 static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
463 int vtg_val, int mode)
466 struct i2c_client *c = the_menelaus->client;
468 mutex_lock(&the_menelaus->lock);
470 ret = menelaus_read_reg(vtg->vtg_reg);
473 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
474 val |= vtg_val << vtg->vtg_shift;
476 dev_dbg(&c->dev, "Setting voltage '%s'"
477 "to %d mV (reg 0x%02x, val 0x%02x)\n",
478 vtg->name, mV, vtg->vtg_reg, val);
480 ret = menelaus_write_reg(vtg->vtg_reg, val);
483 ret = menelaus_write_reg(vtg->mode_reg, mode);
485 mutex_unlock(&the_menelaus->lock);
487 /* Wait for voltage to stabilize */
493 static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
498 for (i = 0; i < n; i++, tbl++)
505 * Vcore can be programmed in two ways:
506 * SW-controlled: Required voltage is programmed into VCORE_CTRL1
507 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
510 * Call correct 'set' function accordingly
513 static const struct menelaus_vtg_value vcore_values[] = {
535 int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
537 int fval, rval, val, ret;
538 struct i2c_client *c = the_menelaus->client;
540 rval = menelaus_get_vtg_value(roof_mV, vcore_values,
541 ARRAY_SIZE(vcore_values));
544 fval = menelaus_get_vtg_value(floor_mV, vcore_values,
545 ARRAY_SIZE(vcore_values));
549 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
552 mutex_lock(&the_menelaus->lock);
553 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
556 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
559 if (!the_menelaus->vcore_hw_mode) {
560 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
561 /* HW mode, turn OFF byte comparator */
562 val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP);
563 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
564 the_menelaus->vcore_hw_mode = 1;
568 mutex_unlock(&the_menelaus->lock);
572 static const struct menelaus_vtg vmem_vtg = {
574 .vtg_reg = MENELAUS_LDO_CTRL1,
577 .mode_reg = MENELAUS_LDO_CTRL3,
580 static const struct menelaus_vtg_value vmem_values[] = {
587 int menelaus_set_vmem(unsigned int mV)
592 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
594 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
597 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
599 EXPORT_SYMBOL(menelaus_set_vmem);
601 static const struct menelaus_vtg vio_vtg = {
603 .vtg_reg = MENELAUS_LDO_CTRL1,
606 .mode_reg = MENELAUS_LDO_CTRL4,
609 static const struct menelaus_vtg_value vio_values[] = {
616 int menelaus_set_vio(unsigned int mV)
621 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
623 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
626 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
628 EXPORT_SYMBOL(menelaus_set_vio);
630 static const struct menelaus_vtg_value vdcdc_values[] = {
641 static const struct menelaus_vtg vdcdc2_vtg = {
643 .vtg_reg = MENELAUS_DCDC_CTRL1,
646 .mode_reg = MENELAUS_DCDC_CTRL2,
649 static const struct menelaus_vtg vdcdc3_vtg = {
651 .vtg_reg = MENELAUS_DCDC_CTRL1,
654 .mode_reg = MENELAUS_DCDC_CTRL3,
657 int menelaus_set_vdcdc(int dcdc, unsigned int mV)
659 const struct menelaus_vtg *vtg;
662 if (dcdc != 2 && dcdc != 3)
670 return menelaus_set_voltage(vtg, 0, 0, 0);
672 val = menelaus_get_vtg_value(mV, vdcdc_values,
673 ARRAY_SIZE(vdcdc_values));
676 return menelaus_set_voltage(vtg, mV, val, 0x03);
679 static const struct menelaus_vtg_value vmmc_values[] = {
686 static const struct menelaus_vtg vmmc_vtg = {
688 .vtg_reg = MENELAUS_LDO_CTRL1,
691 .mode_reg = MENELAUS_LDO_CTRL7,
694 int menelaus_set_vmmc(unsigned int mV)
699 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
701 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
704 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
706 EXPORT_SYMBOL(menelaus_set_vmmc);
709 static const struct menelaus_vtg_value vaux_values[] = {
716 static const struct menelaus_vtg vaux_vtg = {
718 .vtg_reg = MENELAUS_LDO_CTRL1,
721 .mode_reg = MENELAUS_LDO_CTRL6,
724 int menelaus_set_vaux(unsigned int mV)
729 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
731 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
734 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
736 EXPORT_SYMBOL(menelaus_set_vaux);
738 int menelaus_get_slot_pin_states(void)
740 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
742 EXPORT_SYMBOL(menelaus_get_slot_pin_states);
744 int menelaus_set_regulator_sleep(int enable, u32 val)
747 struct i2c_client *c = the_menelaus->client;
749 mutex_lock(&the_menelaus->lock);
750 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
754 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
756 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
759 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);
764 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
766 mutex_unlock(&the_menelaus->lock);
770 /*-----------------------------------------------------------------------*/
772 /* Handles Menelaus interrupts. Does not run in interrupt context */
773 static void menelaus_work(struct work_struct *_menelaus)
775 struct menelaus_chip *menelaus =
776 container_of(_menelaus, struct menelaus_chip, work);
777 void (*handler)(struct menelaus_chip *menelaus);
782 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
783 & ~menelaus->mask2) << 8;
784 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
790 int irq = fls(isr) - 1;
793 mutex_lock(&menelaus->lock);
794 menelaus_disable_irq(irq);
795 menelaus_ack_irq(irq);
796 handler = menelaus->handlers[irq];
799 menelaus_enable_irq(irq);
800 mutex_unlock(&menelaus->lock);
803 enable_irq(menelaus->client->irq);
807 * We cannot use I2C in interrupt context, so we just schedule work.
809 static irqreturn_t menelaus_irq(int irq, void *_menelaus)
811 struct menelaus_chip *menelaus = _menelaus;
813 disable_irq_nosync(irq);
814 (void)schedule_work(&menelaus->work);
819 /*-----------------------------------------------------------------------*/
822 * The RTC needs to be set once, then it runs on backup battery power.
823 * It supports alarms, including system wake alarms (from some modes);
824 * and 1/second IRQs if requested.
826 #ifdef CONFIG_RTC_DRV_TWL92330
828 #define RTC_CTRL_RTC_EN (1 << 0)
829 #define RTC_CTRL_AL_EN (1 << 1)
830 #define RTC_CTRL_MODE12 (1 << 2)
831 #define RTC_CTRL_EVERY_MASK (3 << 3)
832 #define RTC_CTRL_EVERY_SEC (0 << 3)
833 #define RTC_CTRL_EVERY_MIN (1 << 3)
834 #define RTC_CTRL_EVERY_HR (2 << 3)
835 #define RTC_CTRL_EVERY_DAY (3 << 3)
837 #define RTC_UPDATE_EVERY 0x08
839 #define RTC_HR_PM (1 << 7)
841 static void menelaus_to_time(char *regs, struct rtc_time *t)
843 t->tm_sec = bcd2bin(regs[0]);
844 t->tm_min = bcd2bin(regs[1]);
845 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
846 t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1;
847 if (regs[2] & RTC_HR_PM)
850 t->tm_hour = bcd2bin(regs[2] & 0x3f);
851 t->tm_mday = bcd2bin(regs[3]);
852 t->tm_mon = bcd2bin(regs[4]) - 1;
853 t->tm_year = bcd2bin(regs[5]) + 100;
856 static int time_to_menelaus(struct rtc_time *t, int regnum)
860 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));
864 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));
868 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
869 hour = t->tm_hour + 1;
871 hour = RTC_HR_PM | bin2bcd(hour - 12);
873 hour = bin2bcd(hour);
875 hour = bin2bcd(t->tm_hour);
876 status = menelaus_write_reg(regnum++, hour);
880 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));
884 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));
888 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));
894 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
899 static int menelaus_read_time(struct device *dev, struct rtc_time *t)
901 struct i2c_msg msg[2];
905 /* block read date and time registers */
906 regs[0] = MENELAUS_RTC_SEC;
908 msg[0].addr = MENELAUS_I2C_ADDRESS;
913 msg[1].addr = MENELAUS_I2C_ADDRESS;
914 msg[1].flags = I2C_M_RD;
915 msg[1].len = sizeof(regs);
918 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
920 dev_err(dev, "%s error %d\n", "read", status);
924 menelaus_to_time(regs, t);
925 t->tm_wday = bcd2bin(regs[6]);
930 static int menelaus_set_time(struct device *dev, struct rtc_time *t)
934 /* write date and time registers */
935 status = time_to_menelaus(t, MENELAUS_RTC_SEC);
938 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));
940 dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
941 "err %d\n", MENELAUS_RTC_WKDAY, status);
945 /* now commit the write */
946 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
948 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
954 static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
956 struct i2c_msg msg[2];
960 /* block read alarm registers */
961 regs[0] = MENELAUS_RTC_AL_SEC;
963 msg[0].addr = MENELAUS_I2C_ADDRESS;
968 msg[1].addr = MENELAUS_I2C_ADDRESS;
969 msg[1].flags = I2C_M_RD;
970 msg[1].len = sizeof(regs);
973 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
975 dev_err(dev, "%s error %d\n", "alarm read", status);
979 menelaus_to_time(regs, &w->time);
981 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
983 /* NOTE we *could* check if actually pending... */
989 static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
993 if (the_menelaus->client->irq <= 0 && w->enabled)
996 /* clear previous alarm enable */
997 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
998 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
999 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1000 the_menelaus->rtc_control);
1005 /* write alarm registers */
1006 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
1010 /* enable alarm if requested */
1012 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1013 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1014 the_menelaus->rtc_control);
1020 #ifdef CONFIG_RTC_INTF_DEV
1022 static void menelaus_rtc_update_work(struct menelaus_chip *m)
1024 /* report 1/sec update */
1025 local_irq_disable();
1026 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1030 static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1034 if (the_menelaus->client->irq <= 0)
1035 return -ENOIOCTLCMD;
1040 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1042 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1045 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1047 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1049 /* 1/second "update" IRQ */
1051 if (the_menelaus->uie)
1053 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1054 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1055 menelaus_rtc_update_work);
1057 the_menelaus->uie = 1;
1060 if (!the_menelaus->uie)
1062 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1064 the_menelaus->uie = 0;
1067 return -ENOIOCTLCMD;
1069 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1073 #define menelaus_ioctl NULL
1076 /* REVISIT no compensation register support ... */
1078 static const struct rtc_class_ops menelaus_rtc_ops = {
1079 .ioctl = menelaus_ioctl,
1080 .read_time = menelaus_read_time,
1081 .set_time = menelaus_set_time,
1082 .read_alarm = menelaus_read_alarm,
1083 .set_alarm = menelaus_set_alarm,
1086 static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1089 local_irq_disable();
1090 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
1093 /* then disable it; alarms are oneshot */
1094 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1095 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1098 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1100 int alarm = (m->client->irq > 0);
1102 /* assume 32KDETEN pin is pulled high */
1103 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
1104 dev_dbg(&m->client->dev, "no 32k oscillator\n");
1108 /* support RTC alarm; it can issue wakeups */
1110 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
1111 menelaus_rtc_alarm_work) < 0) {
1112 dev_err(&m->client->dev, "can't handle RTC alarm\n");
1115 device_init_wakeup(&m->client->dev, 1);
1118 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
1119 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
1120 if (!(m->rtc_control & RTC_CTRL_RTC_EN)
1121 || (m->rtc_control & RTC_CTRL_AL_EN)
1122 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
1123 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
1124 dev_warn(&m->client->dev, "rtc clock needs setting\n");
1125 m->rtc_control |= RTC_CTRL_RTC_EN;
1127 m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
1128 m->rtc_control &= ~RTC_CTRL_AL_EN;
1129 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
1132 m->rtc = rtc_device_register(DRIVER_NAME,
1134 &menelaus_rtc_ops, THIS_MODULE);
1135 if (IS_ERR(m->rtc)) {
1137 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1138 device_init_wakeup(&m->client->dev, 0);
1140 dev_err(&m->client->dev, "can't register RTC: %d\n",
1141 (int) PTR_ERR(m->rtc));
1142 the_menelaus->rtc = NULL;
1148 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1155 /*-----------------------------------------------------------------------*/
1157 static struct i2c_driver menelaus_i2c_driver;
1159 static int menelaus_probe(struct i2c_client *client,
1160 const struct i2c_device_id *id)
1162 struct menelaus_chip *menelaus;
1165 struct menelaus_platform_data *menelaus_pdata =
1166 dev_get_platdata(&client->dev);
1169 dev_dbg(&client->dev, "only one %s for now\n",
1174 menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL);
1178 i2c_set_clientdata(client, menelaus);
1180 the_menelaus = menelaus;
1181 menelaus->client = client;
1183 /* If a true probe check the device */
1184 rev = menelaus_read_reg(MENELAUS_REV);
1186 pr_err(DRIVER_NAME ": device not found");
1190 /* Ack and disable all Menelaus interrupts */
1191 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
1192 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
1193 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
1194 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
1195 menelaus->mask1 = 0xff;
1196 menelaus->mask2 = 0xff;
1198 /* Set output buffer strengths */
1199 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1201 if (client->irq > 0) {
1202 err = request_irq(client->irq, menelaus_irq, 0,
1203 DRIVER_NAME, menelaus);
1205 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
1211 mutex_init(&menelaus->lock);
1212 INIT_WORK(&menelaus->work, menelaus_work);
1214 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1216 err = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1219 if (err & VCORE_CTRL1_HW_NSW)
1220 menelaus->vcore_hw_mode = 1;
1222 menelaus->vcore_hw_mode = 0;
1224 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1225 err = menelaus_pdata->late_init(&client->dev);
1230 menelaus_rtc_init(menelaus);
1234 free_irq(client->irq, menelaus);
1235 flush_work(&menelaus->work);
1239 static int menelaus_remove(struct i2c_client *client)
1241 struct menelaus_chip *menelaus = i2c_get_clientdata(client);
1243 free_irq(client->irq, menelaus);
1244 flush_work(&menelaus->work);
1245 the_menelaus = NULL;
1249 static const struct i2c_device_id menelaus_id[] = {
1253 MODULE_DEVICE_TABLE(i2c, menelaus_id);
1255 static struct i2c_driver menelaus_i2c_driver = {
1257 .name = DRIVER_NAME,
1259 .probe = menelaus_probe,
1260 .remove = menelaus_remove,
1261 .id_table = menelaus_id,
1264 module_i2c_driver(menelaus_i2c_driver);
1266 MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1267 MODULE_DESCRIPTION("I2C interface for Menelaus.");
1268 MODULE_LICENSE("GPL");