3 * Copyright (C) 2004 Texas Instruments, Inc.
5 * Some parts based tps65010.c:
6 * Copyright (C) 2004 Texas Instruments and
7 * Copyright (C) 2004-2005 David Brownell
9 * Some parts based on tlv320aic24.c:
10 * Copyright (C) by Kai Svahn <kai.svahn@nokia.com>
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
16 * Added support for controlling VCORE and regulator sleep states,
17 * Amit Kucheria <amit.kucheria@nokia.com>
18 * Copyright (C) 2005, 2006 Nokia Corporation
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2 of the License, or
23 * (at your option) any later version.
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
35 #include <linux/module.h>
36 #include <linux/i2c.h>
37 #include <linux/interrupt.h>
38 #include <linux/sched.h>
39 #include <linux/mutex.h>
40 #include <linux/workqueue.h>
41 #include <linux/delay.h>
42 #include <linux/rtc.h>
43 #include <linux/bcd.h>
45 #include <asm/mach-types.h>
46 #include <asm/mach/irq.h>
48 #include <asm/arch/gpio.h>
49 #include <asm/arch/menelaus.h>
51 #define DRIVER_NAME "menelaus"
53 #define pr_err(fmt, arg...) printk(KERN_ERR DRIVER_NAME ": ", ## arg);
55 #define MENELAUS_I2C_ADDRESS 0x72
57 #define MENELAUS_REV 0x01
58 #define MENELAUS_VCORE_CTRL1 0x02
59 #define MENELAUS_VCORE_CTRL2 0x03
60 #define MENELAUS_VCORE_CTRL3 0x04
61 #define MENELAUS_VCORE_CTRL4 0x05
62 #define MENELAUS_VCORE_CTRL5 0x06
63 #define MENELAUS_DCDC_CTRL1 0x07
64 #define MENELAUS_DCDC_CTRL2 0x08
65 #define MENELAUS_DCDC_CTRL3 0x09
66 #define MENELAUS_LDO_CTRL1 0x0A
67 #define MENELAUS_LDO_CTRL2 0x0B
68 #define MENELAUS_LDO_CTRL3 0x0C
69 #define MENELAUS_LDO_CTRL4 0x0D
70 #define MENELAUS_LDO_CTRL5 0x0E
71 #define MENELAUS_LDO_CTRL6 0x0F
72 #define MENELAUS_LDO_CTRL7 0x10
73 #define MENELAUS_LDO_CTRL8 0x11
74 #define MENELAUS_SLEEP_CTRL1 0x12
75 #define MENELAUS_SLEEP_CTRL2 0x13
76 #define MENELAUS_DEVICE_OFF 0x14
77 #define MENELAUS_OSC_CTRL 0x15
78 #define MENELAUS_DETECT_CTRL 0x16
79 #define MENELAUS_INT_MASK1 0x17
80 #define MENELAUS_INT_MASK2 0x18
81 #define MENELAUS_INT_STATUS1 0x19
82 #define MENELAUS_INT_STATUS2 0x1A
83 #define MENELAUS_INT_ACK1 0x1B
84 #define MENELAUS_INT_ACK2 0x1C
85 #define MENELAUS_GPIO_CTRL 0x1D
86 #define MENELAUS_GPIO_IN 0x1E
87 #define MENELAUS_GPIO_OUT 0x1F
88 #define MENELAUS_BBSMS 0x20
89 #define MENELAUS_RTC_CTRL 0x21
90 #define MENELAUS_RTC_UPDATE 0x22
91 #define MENELAUS_RTC_SEC 0x23
92 #define MENELAUS_RTC_MIN 0x24
93 #define MENELAUS_RTC_HR 0x25
94 #define MENELAUS_RTC_DAY 0x26
95 #define MENELAUS_RTC_MON 0x27
96 #define MENELAUS_RTC_YR 0x28
97 #define MENELAUS_RTC_WKDAY 0x29
98 #define MENELAUS_RTC_AL_SEC 0x2A
99 #define MENELAUS_RTC_AL_MIN 0x2B
100 #define MENELAUS_RTC_AL_HR 0x2C
101 #define MENELAUS_RTC_AL_DAY 0x2D
102 #define MENELAUS_RTC_AL_MON 0x2E
103 #define MENELAUS_RTC_AL_YR 0x2F
104 #define MENELAUS_RTC_COMP_MSB 0x30
105 #define MENELAUS_RTC_COMP_LSB 0x31
106 #define MENELAUS_S1_PULL_EN 0x32
107 #define MENELAUS_S1_PULL_DIR 0x33
108 #define MENELAUS_S2_PULL_EN 0x34
109 #define MENELAUS_S2_PULL_DIR 0x35
110 #define MENELAUS_MCT_CTRL1 0x36
111 #define MENELAUS_MCT_CTRL2 0x37
112 #define MENELAUS_MCT_CTRL3 0x38
113 #define MENELAUS_MCT_PIN_ST 0x39
114 #define MENELAUS_DEBOUNCE1 0x3A
116 #define IH_MENELAUS_IRQS 12
117 #define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */
118 #define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */
119 #define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */
120 #define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */
121 #define MENELAUS_LOWBAT_IRQ 4 /* Low battery */
122 #define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */
123 #define MENELAUS_UVLO_IRQ 6 /* UVLO detect */
124 #define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */
125 #define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */
126 #define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */
127 #define MENELAUS_RTCERR_IRQ 10 /* RTC error */
128 #define MENELAUS_PSHBTN_IRQ 11 /* Push button */
129 #define MENELAUS_RESERVED12_IRQ 12 /* Reserved */
130 #define MENELAUS_RESERVED13_IRQ 13 /* Reserved */
131 #define MENELAUS_RESERVED14_IRQ 14 /* Reserved */
132 #define MENELAUS_RESERVED15_IRQ 15 /* Reserved */
134 static void menelaus_work(struct work_struct *_menelaus);
136 struct menelaus_chip {
138 struct i2c_client *client;
139 struct work_struct work;
140 #ifdef CONFIG_RTC_DRV_TWL92330
141 struct rtc_device *rtc;
145 unsigned vcore_hw_mode:1;
147 void (*handlers[16])(struct menelaus_chip *);
148 void (*mmc_callback)(void *data, u8 mask);
149 void *mmc_callback_data;
152 static struct menelaus_chip *the_menelaus;
154 static int menelaus_write_reg(int reg, u8 value)
156 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
159 pr_err("write error");
166 static int menelaus_read_reg(int reg)
168 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
171 pr_err("read error");
176 static int menelaus_enable_irq(int irq)
180 the_menelaus->mask2 &= ~(1 << irq);
181 return menelaus_write_reg(MENELAUS_INT_MASK2,
182 the_menelaus->mask2);
184 the_menelaus->mask1 &= ~(1 << irq);
185 return menelaus_write_reg(MENELAUS_INT_MASK1,
186 the_menelaus->mask1);
190 static int menelaus_disable_irq(int irq)
194 the_menelaus->mask2 |= (1 << irq);
195 return menelaus_write_reg(MENELAUS_INT_MASK2,
196 the_menelaus->mask2);
198 the_menelaus->mask1 |= (1 << irq);
199 return menelaus_write_reg(MENELAUS_INT_MASK1,
200 the_menelaus->mask1);
204 static int menelaus_ack_irq(int irq)
207 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
209 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
212 /* Adds a handler for an interrupt. Does not run in interrupt context */
213 static int menelaus_add_irq_work(int irq,
214 void (*handler)(struct menelaus_chip *))
218 mutex_lock(&the_menelaus->lock);
219 the_menelaus->handlers[irq] = handler;
220 ret = menelaus_enable_irq(irq);
221 mutex_unlock(&the_menelaus->lock);
226 /* Removes handler for an interrupt */
227 static int menelaus_remove_irq_work(int irq)
231 mutex_lock(&the_menelaus->lock);
232 ret = menelaus_disable_irq(irq);
233 the_menelaus->handlers[irq] = NULL;
234 mutex_unlock(&the_menelaus->lock);
240 * Gets scheduled when a card detect interrupt happens. Note that in some cases
241 * this line is wired to card cover switch rather than the card detect switch
242 * in each slot. In this case the cards are not seen by menelaus.
243 * FIXME: Add handling for D1 too
245 static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
248 unsigned char card_mask = 0;
250 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
255 card_mask |= (1 << 0);
258 card_mask |= (1 << 1);
260 if (menelaus_hw->mmc_callback)
261 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
266 * Toggles the MMC slots between open-drain and push-pull mode.
268 int menelaus_set_mmc_opendrain(int slot, int enable)
272 if (slot != 1 && slot != 2)
274 mutex_lock(&the_menelaus->lock);
275 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
277 mutex_unlock(&the_menelaus->lock);
292 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
293 mutex_unlock(&the_menelaus->lock);
297 EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
299 int menelaus_set_slot_sel(int enable)
303 mutex_lock(&the_menelaus->lock);
304 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
312 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
314 mutex_unlock(&the_menelaus->lock);
317 EXPORT_SYMBOL(menelaus_set_slot_sel);
319 int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
323 if (slot != 1 && slot != 2)
328 mutex_lock(&the_menelaus->lock);
330 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
336 val |= (1 << 4) | (1 << 6);
338 val &= ~((1 << 4) | (1 << 6));
341 val |= (1 << 5) | (1 << 7);
343 val &= ~((1 << 5) | (1 << 7));
345 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
349 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
365 b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
368 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
372 /* Disable autonomous shutdown */
374 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
376 mutex_unlock(&the_menelaus->lock);
379 EXPORT_SYMBOL(menelaus_set_mmc_slot);
381 int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
386 the_menelaus->mmc_callback_data = data;
387 the_menelaus->mmc_callback = callback;
388 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
389 menelaus_mmc_cd_work);
392 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
393 menelaus_mmc_cd_work);
396 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
397 menelaus_mmc_cd_work);
400 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
401 menelaus_mmc_cd_work);
405 EXPORT_SYMBOL(menelaus_register_mmc_callback);
407 void menelaus_unregister_mmc_callback(void)
409 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
410 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
411 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
412 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
414 the_menelaus->mmc_callback = NULL;
415 the_menelaus->mmc_callback_data = 0;
417 EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
419 struct menelaus_vtg {
427 struct menelaus_vtg_value {
432 static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
433 int vtg_val, int mode)
436 struct i2c_client *c = the_menelaus->client;
438 mutex_lock(&the_menelaus->lock);
442 ret = menelaus_read_reg(vtg->vtg_reg);
445 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
446 val |= vtg_val << vtg->vtg_shift;
448 dev_dbg(&c->dev, "Setting voltage '%s'"
449 "to %d mV (reg 0x%02x, val 0x%02x)\n",
450 vtg->name, mV, vtg->vtg_reg, val);
452 ret = menelaus_write_reg(vtg->vtg_reg, val);
456 ret = menelaus_write_reg(vtg->mode_reg, mode);
458 mutex_unlock(&the_menelaus->lock);
460 /* Wait for voltage to stabilize */
466 static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
471 for (i = 0; i < n; i++, tbl++)
478 * Vcore can be programmed in two ways:
479 * SW-controlled: Required voltage is programmed into VCORE_CTRL1
480 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
483 * Call correct 'set' function accordingly
486 static const struct menelaus_vtg_value vcore_values[] = {
508 int menelaus_set_vcore_sw(unsigned int mV)
511 struct i2c_client *c = the_menelaus->client;
513 val = menelaus_get_vtg_value(mV, vcore_values,
514 ARRAY_SIZE(vcore_values));
518 dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val);
520 /* Set SW mode and the voltage in one go. */
521 mutex_lock(&the_menelaus->lock);
522 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
524 the_menelaus->vcore_hw_mode = 0;
525 mutex_unlock(&the_menelaus->lock);
531 int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
533 int fval, rval, val, ret;
534 struct i2c_client *c = the_menelaus->client;
536 rval = menelaus_get_vtg_value(roof_mV, vcore_values,
537 ARRAY_SIZE(vcore_values));
540 fval = menelaus_get_vtg_value(floor_mV, vcore_values,
541 ARRAY_SIZE(vcore_values));
545 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
548 mutex_lock(&the_menelaus->lock);
549 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
552 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
555 if (!the_menelaus->vcore_hw_mode) {
556 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
557 /* HW mode, turn OFF byte comparator */
558 val |= ((1 << 7) | (1 << 5));
559 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
560 the_menelaus->vcore_hw_mode = 1;
564 mutex_unlock(&the_menelaus->lock);
568 static const struct menelaus_vtg vmem_vtg = {
570 .vtg_reg = MENELAUS_LDO_CTRL1,
573 .mode_reg = MENELAUS_LDO_CTRL3,
576 static const struct menelaus_vtg_value vmem_values[] = {
583 int menelaus_set_vmem(unsigned int mV)
588 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
590 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
593 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
595 EXPORT_SYMBOL(menelaus_set_vmem);
597 static const struct menelaus_vtg vio_vtg = {
599 .vtg_reg = MENELAUS_LDO_CTRL1,
602 .mode_reg = MENELAUS_LDO_CTRL4,
605 static const struct menelaus_vtg_value vio_values[] = {
612 int menelaus_set_vio(unsigned int mV)
617 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
619 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
622 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
624 EXPORT_SYMBOL(menelaus_set_vio);
626 static const struct menelaus_vtg_value vdcdc_values[] = {
637 static const struct menelaus_vtg vdcdc2_vtg = {
639 .vtg_reg = MENELAUS_DCDC_CTRL1,
642 .mode_reg = MENELAUS_DCDC_CTRL2,
645 static const struct menelaus_vtg vdcdc3_vtg = {
647 .vtg_reg = MENELAUS_DCDC_CTRL1,
650 .mode_reg = MENELAUS_DCDC_CTRL3,
653 int menelaus_set_vdcdc(int dcdc, unsigned int mV)
655 const struct menelaus_vtg *vtg;
658 if (dcdc != 2 && dcdc != 3)
666 return menelaus_set_voltage(vtg, 0, 0, 0);
668 val = menelaus_get_vtg_value(mV, vdcdc_values,
669 ARRAY_SIZE(vdcdc_values));
672 return menelaus_set_voltage(vtg, mV, val, 0x03);
675 static const struct menelaus_vtg_value vmmc_values[] = {
682 static const struct menelaus_vtg vmmc_vtg = {
684 .vtg_reg = MENELAUS_LDO_CTRL1,
687 .mode_reg = MENELAUS_LDO_CTRL7,
690 int menelaus_set_vmmc(unsigned int mV)
695 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
697 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
700 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
702 EXPORT_SYMBOL(menelaus_set_vmmc);
705 static const struct menelaus_vtg_value vaux_values[] = {
712 static const struct menelaus_vtg vaux_vtg = {
714 .vtg_reg = MENELAUS_LDO_CTRL1,
717 .mode_reg = MENELAUS_LDO_CTRL6,
720 int menelaus_set_vaux(unsigned int mV)
725 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
727 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
730 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
732 EXPORT_SYMBOL(menelaus_set_vaux);
734 int menelaus_get_slot_pin_states(void)
736 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
738 EXPORT_SYMBOL(menelaus_get_slot_pin_states);
740 int menelaus_set_regulator_sleep(int enable, u32 val)
743 struct i2c_client *c = the_menelaus->client;
745 mutex_lock(&the_menelaus->lock);
746 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
750 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
752 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
755 t = ((1 << 6) | 0x04);
760 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
762 mutex_unlock(&the_menelaus->lock);
766 /*-----------------------------------------------------------------------*/
768 /* Handles Menelaus interrupts. Does not run in interrupt context */
769 static void menelaus_work(struct work_struct *_menelaus)
771 struct menelaus_chip *menelaus =
772 container_of(_menelaus, struct menelaus_chip, work);
773 void (*handler)(struct menelaus_chip *menelaus);
778 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
779 & ~menelaus->mask2) << 8;
780 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
786 int irq = fls(isr) - 1;
789 mutex_lock(&menelaus->lock);
790 menelaus_disable_irq(irq);
791 menelaus_ack_irq(irq);
792 handler = menelaus->handlers[irq];
795 menelaus_enable_irq(irq);
796 mutex_unlock(&menelaus->lock);
799 enable_irq(menelaus->client->irq);
803 * We cannot use I2C in interrupt context, so we just schedule work.
805 static irqreturn_t menelaus_irq(int irq, void *_menelaus)
807 struct menelaus_chip *menelaus = _menelaus;
809 disable_irq_nosync(irq);
810 (void)schedule_work(&menelaus->work);
815 /*-----------------------------------------------------------------------*/
818 * The RTC needs to be set once, then it runs on backup battery power.
819 * It supports alarms, including system wake alarms (from some modes);
820 * and 1/second IRQs if requested.
822 #ifdef CONFIG_RTC_DRV_TWL92330
824 #define RTC_CTRL_RTC_EN (1 << 0)
825 #define RTC_CTRL_AL_EN (1 << 1)
826 #define RTC_CTRL_MODE12 (1 << 2)
827 #define RTC_CTRL_EVERY_MASK (3 << 3)
828 #define RTC_CTRL_EVERY_SEC (0 << 3)
829 #define RTC_CTRL_EVERY_MIN (1 << 3)
830 #define RTC_CTRL_EVERY_HR (2 << 3)
831 #define RTC_CTRL_EVERY_DAY (3 << 3)
833 #define RTC_UPDATE_EVERY 0x08
835 #define RTC_HR_PM (1 << 7)
837 static void menelaus_to_time(char *regs, struct rtc_time *t)
839 t->tm_sec = BCD2BIN(regs[0]);
840 t->tm_min = BCD2BIN(regs[1]);
841 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
842 t->tm_hour = BCD2BIN(regs[2] & 0x1f) - 1;
843 if (regs[2] & RTC_HR_PM)
846 t->tm_hour = BCD2BIN(regs[2] & 0x3f);
847 t->tm_mday = BCD2BIN(regs[3]);
848 t->tm_mon = BCD2BIN(regs[4]) - 1;
849 t->tm_year = BCD2BIN(regs[5]) + 100;
852 static int time_to_menelaus(struct rtc_time *t, int regnum)
856 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_sec));
860 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_min));
864 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
865 hour = t->tm_hour + 1;
867 hour = RTC_HR_PM | BIN2BCD(hour - 12);
869 hour = BIN2BCD(hour);
871 hour = BIN2BCD(t->tm_hour);
872 status = menelaus_write_reg(regnum++, hour);
876 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mday));
880 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mon + 1));
884 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_year - 100));
890 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
895 static int menelaus_read_time(struct device *dev, struct rtc_time *t)
897 struct i2c_msg msg[2];
901 /* block read date and time registers */
902 regs[0] = MENELAUS_RTC_SEC;
904 msg[0].addr = MENELAUS_I2C_ADDRESS;
909 msg[1].addr = MENELAUS_I2C_ADDRESS;
910 msg[1].flags = I2C_M_RD;
911 msg[1].len = sizeof(regs);
914 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
916 dev_err(dev, "%s error %d\n", "read", status);
920 menelaus_to_time(regs, t);
921 t->tm_wday = BCD2BIN(regs[6]);
926 static int menelaus_set_time(struct device *dev, struct rtc_time *t)
930 /* write date and time registers */
931 status = time_to_menelaus(t, MENELAUS_RTC_SEC);
934 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, BIN2BCD(t->tm_wday));
936 dev_err(&the_menelaus->client->dev, "rtc write reg %02x",
937 "err %d\n", MENELAUS_RTC_WKDAY, status);
941 /* now commit the write */
942 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
944 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
950 static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
952 struct i2c_msg msg[2];
956 /* block read alarm registers */
957 regs[0] = MENELAUS_RTC_AL_SEC;
959 msg[0].addr = MENELAUS_I2C_ADDRESS;
964 msg[1].addr = MENELAUS_I2C_ADDRESS;
965 msg[1].flags = I2C_M_RD;
966 msg[1].len = sizeof(regs);
969 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
971 dev_err(dev, "%s error %d\n", "alarm read", status);
975 menelaus_to_time(regs, &w->time);
977 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
979 /* NOTE we *could* check if actually pending... */
985 static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
989 if (the_menelaus->client->irq <= 0 && w->enabled)
992 /* clear previous alarm enable */
993 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
994 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
995 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
996 the_menelaus->rtc_control);
1001 /* write alarm registers */
1002 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
1006 /* enable alarm if requested */
1008 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1009 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1010 the_menelaus->rtc_control);
1016 #ifdef CONFIG_RTC_INTF_DEV
1018 static void menelaus_rtc_update_work(struct menelaus_chip *m)
1020 /* report 1/sec update */
1021 local_irq_disable();
1022 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1026 static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1030 if (the_menelaus->client->irq <= 0)
1031 return -ENOIOCTLCMD;
1036 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1038 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1041 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1043 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1045 /* 1/second "update" IRQ */
1047 if (the_menelaus->uie)
1049 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1050 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1051 menelaus_rtc_update_work);
1053 the_menelaus->uie = 1;
1056 if (!the_menelaus->uie)
1058 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1060 the_menelaus->uie = 0;
1063 return -ENOIOCTLCMD;
1065 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1069 #define menelaus_ioctl NULL
1072 /* REVISIT no compensation register support ... */
1074 static const struct rtc_class_ops menelaus_rtc_ops = {
1075 .ioctl = menelaus_ioctl,
1076 .read_time = menelaus_read_time,
1077 .set_time = menelaus_set_time,
1078 .read_alarm = menelaus_read_alarm,
1079 .set_alarm = menelaus_set_alarm,
1082 static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1085 local_irq_disable();
1086 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
1089 /* then disable it; alarms are oneshot */
1090 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1091 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1094 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1096 int alarm = (m->client->irq > 0);
1098 /* assume 32KDETEN pin is pulled high */
1099 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
1100 dev_dbg(&m->client->dev, "no 32k oscillator\n");
1104 /* support RTC alarm; it can issue wakeups */
1106 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
1107 menelaus_rtc_alarm_work) < 0) {
1108 dev_err(&m->client->dev, "can't handle RTC alarm\n");
1111 device_init_wakeup(&m->client->dev, 1);
1114 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
1115 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
1116 if (!(m->rtc_control & RTC_CTRL_RTC_EN)
1117 || (m->rtc_control & RTC_CTRL_AL_EN)
1118 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
1119 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
1120 dev_warn(&m->client->dev, "rtc clock needs setting\n");
1121 m->rtc_control |= RTC_CTRL_RTC_EN;
1123 m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
1124 m->rtc_control &= ~RTC_CTRL_AL_EN;
1125 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
1128 m->rtc = rtc_device_register(DRIVER_NAME,
1130 &menelaus_rtc_ops, THIS_MODULE);
1131 if (IS_ERR(m->rtc)) {
1133 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1134 device_init_wakeup(&m->client->dev, 0);
1136 dev_err(&m->client->dev, "can't register RTC: %d\n",
1137 (int) PTR_ERR(m->rtc));
1138 the_menelaus->rtc = NULL;
1144 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1151 /*-----------------------------------------------------------------------*/
1153 static struct i2c_driver menelaus_i2c_driver;
1155 static int menelaus_probe(struct i2c_client *client)
1157 struct menelaus_chip *menelaus;
1160 struct menelaus_platform_data *menelaus_pdata =
1161 client->dev.platform_data;
1164 dev_dbg(&client->dev, "only one %s for now\n",
1169 menelaus = kzalloc(sizeof *menelaus, GFP_KERNEL);
1173 i2c_set_clientdata(client, menelaus);
1175 the_menelaus = menelaus;
1176 menelaus->client = client;
1178 /* If a true probe check the device */
1179 rev = menelaus_read_reg(MENELAUS_REV);
1181 pr_err("device not found");
1186 /* Ack and disable all Menelaus interrupts */
1187 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
1188 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
1189 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
1190 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
1191 menelaus->mask1 = 0xff;
1192 menelaus->mask2 = 0xff;
1194 /* Set output buffer strengths */
1195 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1197 if (client->irq > 0) {
1198 err = request_irq(client->irq, menelaus_irq, IRQF_DISABLED,
1199 DRIVER_NAME, menelaus);
1201 dev_dbg(&client->dev, "can't get IRQ %d, err %d",
1207 mutex_init(&menelaus->lock);
1208 INIT_WORK(&menelaus->work, menelaus_work);
1210 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1212 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1216 menelaus->vcore_hw_mode = 1;
1218 menelaus->vcore_hw_mode = 0;
1220 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1221 err = menelaus_pdata->late_init(&client->dev);
1226 menelaus_rtc_init(menelaus);
1230 free_irq(client->irq, menelaus);
1231 flush_scheduled_work();
1237 static int __exit menelaus_remove(struct i2c_client *client)
1239 struct menelaus_chip *menelaus = i2c_get_clientdata(client);
1241 free_irq(client->irq, menelaus);
1243 i2c_set_clientdata(client, NULL);
1244 the_menelaus = NULL;
1248 static struct i2c_driver menelaus_i2c_driver = {
1250 .name = DRIVER_NAME,
1252 .probe = menelaus_probe,
1253 .remove = __exit_p(menelaus_remove),
1256 static int __init menelaus_init(void)
1260 res = i2c_add_driver(&menelaus_i2c_driver);
1262 pr_err("driver registration failed\n");
1269 static void __exit menelaus_exit(void)
1271 i2c_del_driver(&menelaus_i2c_driver);
1273 /* FIXME: Shutdown menelaus parts that can be shut down */
1276 MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1277 MODULE_DESCRIPTION("I2C interface for Menelaus.");
1278 MODULE_LICENSE("GPL");
1280 module_init(menelaus_init);
1281 module_exit(menelaus_exit);