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>
44 #include <asm/mach-types.h>
45 #include <asm/mach/irq.h>
47 #include <asm/arch/gpio.h>
48 #include <asm/arch/menelaus.h>
50 #define DRIVER_NAME "menelaus"
52 #define pr_err(fmt, arg...) printk(KERN_ERR DRIVER_NAME ": ", ## arg);
54 #define MENELAUS_I2C_ADDRESS 0x72
56 #define MENELAUS_REV 0x01
57 #define MENELAUS_VCORE_CTRL1 0x02
58 #define MENELAUS_VCORE_CTRL2 0x03
59 #define MENELAUS_VCORE_CTRL3 0x04
60 #define MENELAUS_VCORE_CTRL4 0x05
61 #define MENELAUS_VCORE_CTRL5 0x06
62 #define MENELAUS_DCDC_CTRL1 0x07
63 #define MENELAUS_DCDC_CTRL2 0x08
64 #define MENELAUS_DCDC_CTRL3 0x09
65 #define MENELAUS_LDO_CTRL1 0x0A
66 #define MENELAUS_LDO_CTRL2 0x0B
67 #define MENELAUS_LDO_CTRL3 0x0C
68 #define MENELAUS_LDO_CTRL4 0x0D
69 #define MENELAUS_LDO_CTRL5 0x0E
70 #define MENELAUS_LDO_CTRL6 0x0F
71 #define MENELAUS_LDO_CTRL7 0x10
72 #define MENELAUS_LDO_CTRL8 0x11
73 #define MENELAUS_SLEEP_CTRL1 0x12
74 #define MENELAUS_SLEEP_CTRL2 0x13
75 #define MENELAUS_DEVICE_OFF 0x14
76 #define MENELAUS_OSC_CTRL 0x15
77 #define MENELAUS_DETECT_CTRL 0x16
78 #define MENELAUS_INT_MASK1 0x17
79 #define MENELAUS_INT_MASK2 0x18
80 #define MENELAUS_INT_STATUS1 0x19
81 #define MENELAUS_INT_STATUS2 0x1A
82 #define MENELAUS_INT_ACK1 0x1B
83 #define MENELAUS_INT_ACK2 0x1C
84 #define MENELAUS_GPIO_CTRL 0x1D
85 #define MENELAUS_GPIO_IN 0x1E
86 #define MENELAUS_GPIO_OUT 0x1F
87 #define MENELAUS_BBSMS 0x20
88 #define MENELAUS_RTC_CTRL 0x21
89 #define MENELAUS_RTC_UPDATE 0x22
90 #define MENELAUS_RTC_SEC 0x23
91 #define MENELAUS_RTC_MIN 0x24
92 #define MENELAUS_RTC_HR 0x25
93 #define MENELAUS_RTC_DAY 0x26
94 #define MENELAUS_RTC_MON 0x27
95 #define MENELAUS_RTC_YR 0x28
96 #define MENELAUS_RTC_WKDAY 0x29
97 #define MENELAUS_RTC_AL_SEC 0x2A
98 #define MENELAUS_RTC_AL_MIN 0x2B
99 #define MENELAUS_RTC_AL_HR 0x2C
100 #define MENELAUS_RTC_AL_DAY 0x2D
101 #define MENELAUS_RTC_AL_MON 0x2E
102 #define MENELAUS_RTC_AL_YR 0x2F
103 #define MENELAUS_RTC_COMP_MSB 0x30
104 #define MENELAUS_RTC_COMP_LSB 0x31
105 #define MENELAUS_S1_PULL_EN 0x32
106 #define MENELAUS_S1_PULL_DIR 0x33
107 #define MENELAUS_S2_PULL_EN 0x34
108 #define MENELAUS_S2_PULL_DIR 0x35
109 #define MENELAUS_MCT_CTRL1 0x36
110 #define MENELAUS_MCT_CTRL2 0x37
111 #define MENELAUS_MCT_CTRL3 0x38
112 #define MENELAUS_MCT_PIN_ST 0x39
113 #define MENELAUS_DEBOUNCE1 0x3A
115 #define IH_MENELAUS_IRQS 12
116 #define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */
117 #define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */
118 #define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */
119 #define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */
120 #define MENELAUS_LOWBAT_IRQ 4 /* Low battery */
121 #define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */
122 #define MENELAUS_UVLO_IRQ 6 /* UVLO detect */
123 #define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */
124 #define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */
125 #define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */
126 #define MENELAUS_RTCERR_IRQ 10 /* RTC error */
127 #define MENELAUS_PSHBTN_IRQ 11 /* Push button */
128 #define MENELAUS_RESERVED12_IRQ 12 /* Reserved */
129 #define MENELAUS_RESERVED13_IRQ 13 /* Reserved */
130 #define MENELAUS_RESERVED14_IRQ 14 /* Reserved */
131 #define MENELAUS_RESERVED15_IRQ 15 /* Reserved */
133 static void menelaus_work(struct work_struct *_menelaus);
135 struct menelaus_chip {
137 struct i2c_client *client;
138 struct work_struct work;
139 #ifdef CONFIG_RTC_DRV_TWL92330
140 struct rtc_device *rtc;
144 unsigned vcore_hw_mode:1;
146 void (*handlers[16])(struct menelaus_chip *);
147 void (*mmc_callback)(void *data, u8 mask);
148 void *mmc_callback_data;
151 static struct menelaus_chip *the_menelaus;
153 static int menelaus_write_reg(int reg, u8 value)
155 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
158 pr_err("write error");
165 static int menelaus_read_reg(int reg)
167 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
170 pr_err("read error");
175 static int menelaus_enable_irq(int irq)
179 the_menelaus->mask2 &= ~(1 << irq);
180 return menelaus_write_reg(MENELAUS_INT_MASK2,
181 the_menelaus->mask2);
183 the_menelaus->mask1 &= ~(1 << irq);
184 return menelaus_write_reg(MENELAUS_INT_MASK1,
185 the_menelaus->mask1);
189 static int menelaus_disable_irq(int irq)
193 the_menelaus->mask2 |= (1 << irq);
194 return menelaus_write_reg(MENELAUS_INT_MASK2,
195 the_menelaus->mask2);
197 the_menelaus->mask1 |= (1 << irq);
198 return menelaus_write_reg(MENELAUS_INT_MASK1,
199 the_menelaus->mask1);
203 static int menelaus_ack_irq(int irq)
206 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
208 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
211 /* Adds a handler for an interrupt. Does not run in interrupt context */
212 static int menelaus_add_irq_work(int irq,
213 void (*handler)(struct menelaus_chip *))
217 mutex_lock(&the_menelaus->lock);
218 the_menelaus->handlers[irq] = handler;
219 ret = menelaus_enable_irq(irq);
220 mutex_unlock(&the_menelaus->lock);
225 /* Removes handler for an interrupt */
226 static int menelaus_remove_irq_work(int irq)
230 mutex_lock(&the_menelaus->lock);
231 ret = menelaus_disable_irq(irq);
232 the_menelaus->handlers[irq] = NULL;
233 mutex_unlock(&the_menelaus->lock);
239 * Gets scheduled when a card detect interrupt happens. Note that in some cases
240 * this line is wired to card cover switch rather than the card detect switch
241 * in each slot. In this case the cards are not seen by menelaus.
242 * FIXME: Add handling for D1 too
244 static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
247 unsigned char card_mask = 0;
249 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
254 card_mask |= (1 << 0);
257 card_mask |= (1 << 1);
259 if (menelaus_hw->mmc_callback)
260 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
265 * Toggles the MMC slots between open-drain and push-pull mode.
267 int menelaus_set_mmc_opendrain(int slot, int enable)
271 if (slot != 1 && slot != 2)
273 mutex_lock(&the_menelaus->lock);
274 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
276 mutex_unlock(&the_menelaus->lock);
291 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
292 mutex_unlock(&the_menelaus->lock);
296 EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
298 int menelaus_set_slot_sel(int enable)
302 mutex_lock(&the_menelaus->lock);
303 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
311 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
313 mutex_unlock(&the_menelaus->lock);
316 EXPORT_SYMBOL(menelaus_set_slot_sel);
318 int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
322 if (slot != 1 && slot != 2)
327 mutex_lock(&the_menelaus->lock);
329 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
335 val |= (1 << 4) | (1 << 6);
337 val &= ~((1 << 4) | (1 << 6));
340 val |= (1 << 5) | (1 << 7);
342 val &= ~((1 << 5) | (1 << 7));
344 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
348 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
364 b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
367 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
371 /* Disable autonomous shutdown */
373 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
375 mutex_unlock(&the_menelaus->lock);
378 EXPORT_SYMBOL(menelaus_set_mmc_slot);
380 int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
385 the_menelaus->mmc_callback_data = data;
386 the_menelaus->mmc_callback = callback;
387 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
388 menelaus_mmc_cd_work);
391 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
392 menelaus_mmc_cd_work);
395 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
396 menelaus_mmc_cd_work);
399 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
400 menelaus_mmc_cd_work);
404 EXPORT_SYMBOL(menelaus_register_mmc_callback);
406 void menelaus_unregister_mmc_callback(void)
408 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
409 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
410 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
411 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
413 the_menelaus->mmc_callback = NULL;
414 the_menelaus->mmc_callback_data = 0;
416 EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
418 struct menelaus_vtg {
426 struct menelaus_vtg_value {
431 static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
432 int vtg_val, int mode)
435 struct i2c_client *c = the_menelaus->client;
437 mutex_lock(&the_menelaus->lock);
441 ret = menelaus_read_reg(vtg->vtg_reg);
444 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
445 val |= vtg_val << vtg->vtg_shift;
447 dev_dbg(&c->dev, "Setting voltage '%s'"
448 "to %d mV (reg 0x%02x, val 0x%02x)\n",
449 vtg->name, mV, vtg->vtg_reg, val);
451 ret = menelaus_write_reg(vtg->vtg_reg, val);
455 ret = menelaus_write_reg(vtg->mode_reg, mode);
457 mutex_unlock(&the_menelaus->lock);
459 /* Wait for voltage to stabilize */
465 static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
470 for (i = 0; i < n; i++, tbl++)
477 * Vcore can be programmed in two ways:
478 * SW-controlled: Required voltage is programmed into VCORE_CTRL1
479 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
482 * Call correct 'set' function accordingly
485 static const struct menelaus_vtg_value vcore_values[] = {
507 int menelaus_set_vcore_sw(unsigned int mV)
510 struct i2c_client *c = the_menelaus->client;
512 val = menelaus_get_vtg_value(mV, vcore_values,
513 ARRAY_SIZE(vcore_values));
517 dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val);
519 /* Set SW mode and the voltage in one go. */
520 mutex_lock(&the_menelaus->lock);
521 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
523 the_menelaus->vcore_hw_mode = 0;
524 mutex_unlock(&the_menelaus->lock);
530 int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
532 int fval, rval, val, ret;
533 struct i2c_client *c = the_menelaus->client;
535 rval = menelaus_get_vtg_value(roof_mV, vcore_values,
536 ARRAY_SIZE(vcore_values));
539 fval = menelaus_get_vtg_value(floor_mV, vcore_values,
540 ARRAY_SIZE(vcore_values));
544 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
547 mutex_lock(&the_menelaus->lock);
548 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
551 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
554 if (!the_menelaus->vcore_hw_mode) {
555 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
556 /* HW mode, turn OFF byte comparator */
557 val |= ((1 << 7) | (1 << 5));
558 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
559 the_menelaus->vcore_hw_mode = 1;
563 mutex_unlock(&the_menelaus->lock);
567 static const struct menelaus_vtg vmem_vtg = {
569 .vtg_reg = MENELAUS_LDO_CTRL1,
572 .mode_reg = MENELAUS_LDO_CTRL3,
575 static const struct menelaus_vtg_value vmem_values[] = {
582 int menelaus_set_vmem(unsigned int mV)
587 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
589 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
592 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
594 EXPORT_SYMBOL(menelaus_set_vmem);
596 static const struct menelaus_vtg vio_vtg = {
598 .vtg_reg = MENELAUS_LDO_CTRL1,
601 .mode_reg = MENELAUS_LDO_CTRL4,
604 static const struct menelaus_vtg_value vio_values[] = {
611 int menelaus_set_vio(unsigned int mV)
616 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
618 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
621 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
623 EXPORT_SYMBOL(menelaus_set_vio);
625 static const struct menelaus_vtg_value vdcdc_values[] = {
636 static const struct menelaus_vtg vdcdc2_vtg = {
638 .vtg_reg = MENELAUS_DCDC_CTRL1,
641 .mode_reg = MENELAUS_DCDC_CTRL2,
644 static const struct menelaus_vtg vdcdc3_vtg = {
646 .vtg_reg = MENELAUS_DCDC_CTRL1,
649 .mode_reg = MENELAUS_DCDC_CTRL3,
652 int menelaus_set_vdcdc(int dcdc, unsigned int mV)
654 const struct menelaus_vtg *vtg;
657 if (dcdc != 2 && dcdc != 3)
665 return menelaus_set_voltage(vtg, 0, 0, 0);
667 val = menelaus_get_vtg_value(mV, vdcdc_values,
668 ARRAY_SIZE(vdcdc_values));
671 return menelaus_set_voltage(vtg, mV, val, 0x03);
674 static const struct menelaus_vtg_value vmmc_values[] = {
681 static const struct menelaus_vtg vmmc_vtg = {
683 .vtg_reg = MENELAUS_LDO_CTRL1,
686 .mode_reg = MENELAUS_LDO_CTRL7,
689 int menelaus_set_vmmc(unsigned int mV)
694 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
696 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
699 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
701 EXPORT_SYMBOL(menelaus_set_vmmc);
704 static const struct menelaus_vtg_value vaux_values[] = {
711 static const struct menelaus_vtg vaux_vtg = {
713 .vtg_reg = MENELAUS_LDO_CTRL1,
716 .mode_reg = MENELAUS_LDO_CTRL6,
719 int menelaus_set_vaux(unsigned int mV)
724 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
726 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
729 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
731 EXPORT_SYMBOL(menelaus_set_vaux);
733 int menelaus_get_slot_pin_states(void)
735 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
737 EXPORT_SYMBOL(menelaus_get_slot_pin_states);
739 int menelaus_set_regulator_sleep(int enable, u32 val)
742 struct i2c_client *c = the_menelaus->client;
744 mutex_lock(&the_menelaus->lock);
745 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
749 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
751 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
754 t = ((1 << 6) | 0x04);
759 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
761 mutex_unlock(&the_menelaus->lock);
765 /*-----------------------------------------------------------------------*/
767 /* Handles Menelaus interrupts. Does not run in interrupt context */
768 static void menelaus_work(struct work_struct *_menelaus)
770 struct menelaus_chip *menelaus =
771 container_of(_menelaus, struct menelaus_chip, work);
772 void (*handler)(struct menelaus_chip *menelaus);
777 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
778 & ~menelaus->mask2) << 8;
779 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
785 int irq = fls(isr) - 1;
788 mutex_lock(&menelaus->lock);
789 menelaus_disable_irq(irq);
790 menelaus_ack_irq(irq);
791 handler = menelaus->handlers[irq];
794 menelaus_enable_irq(irq);
795 mutex_unlock(&menelaus->lock);
798 enable_irq(menelaus->client->irq);
802 * We cannot use I2C in interrupt context, so we just schedule work.
804 static irqreturn_t menelaus_irq(int irq, void *_menelaus)
806 struct menelaus_chip *menelaus = _menelaus;
808 disable_irq_nosync(irq);
809 (void)schedule_work(&menelaus->work);
814 /*-----------------------------------------------------------------------*/
817 * The RTC needs to be set once, then it runs on backup battery power.
818 * It supports alarms, including system wake alarms (from some modes);
819 * and 1/second IRQs if requested.
821 #ifdef CONFIG_RTC_DRV_TWL92330
823 #define RTC_CTRL_RTC_EN (1 << 0)
824 #define RTC_CTRL_AL_EN (1 << 1)
825 #define RTC_CTRL_MODE12 (1 << 2)
826 #define RTC_CTRL_EVERY_MASK (3 << 3)
827 #define RTC_CTRL_EVERY_SEC (0 << 3)
828 #define RTC_CTRL_EVERY_MIN (1 << 3)
829 #define RTC_CTRL_EVERY_HR (2 << 3)
830 #define RTC_CTRL_EVERY_DAY (3 << 3)
832 #define RTC_UPDATE_EVERY 0x08
834 #define RTC_HR_PM (1 << 7)
836 static void menelaus_to_time(char *regs, struct rtc_time *t)
838 t->tm_sec = BCD2BIN(regs[0]);
839 t->tm_min = BCD2BIN(regs[1]);
840 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
841 t->tm_hour = BCD2BIN(regs[2] & 0x1f) - 1;
842 if (regs[2] & RTC_HR_PM)
845 t->tm_hour = BCD2BIN(regs[2] & 0x3f);
846 t->tm_mday = BCD2BIN(regs[3]);
847 t->tm_mon = BCD2BIN(regs[4]) - 1;
848 t->tm_year = BCD2BIN(regs[5]) + 100;
851 static int time_to_menelaus(struct rtc_time *t, int regnum)
855 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_sec));
859 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_min));
863 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
864 hour = t->tm_hour + 1;
866 hour = RTC_HR_PM | BIN2BCD(hour - 12);
868 hour = BIN2BCD(hour);
870 hour = BIN2BCD(t->tm_hour);
871 status = menelaus_write_reg(regnum++, hour);
875 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mday));
879 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mon + 1));
883 status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_year - 100));
889 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
894 static int menelaus_read_time(struct device *dev, struct rtc_time *t)
896 struct i2c_msg msg[2];
900 /* block read date and time registers */
901 regs[0] = MENELAUS_RTC_SEC;
903 msg[0].addr = MENELAUS_I2C_ADDRESS;
908 msg[1].addr = MENELAUS_I2C_ADDRESS;
909 msg[1].flags = I2C_M_RD;
910 msg[1].len = sizeof(regs);
913 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
915 dev_err(dev, "%s error %d\n", "read", status);
919 menelaus_to_time(regs, t);
920 t->tm_wday = BCD2BIN(regs[6]);
925 static int menelaus_set_time(struct device *dev, struct rtc_time *t)
929 /* write date and time registers */
930 status = time_to_menelaus(t, MENELAUS_RTC_SEC);
933 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, BIN2BCD(t->tm_wday));
935 dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
936 "err %d\n", MENELAUS_RTC_WKDAY, status);
940 /* now commit the write */
941 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
943 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
949 static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
951 struct i2c_msg msg[2];
955 /* block read alarm registers */
956 regs[0] = MENELAUS_RTC_AL_SEC;
958 msg[0].addr = MENELAUS_I2C_ADDRESS;
963 msg[1].addr = MENELAUS_I2C_ADDRESS;
964 msg[1].flags = I2C_M_RD;
965 msg[1].len = sizeof(regs);
968 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
970 dev_err(dev, "%s error %d\n", "alarm read", status);
974 menelaus_to_time(regs, &w->time);
976 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
978 /* NOTE we *could* check if actually pending... */
984 static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
988 if (the_menelaus->client->irq <= 0 && w->enabled)
991 /* clear previous alarm enable */
992 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
993 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
994 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
995 the_menelaus->rtc_control);
1000 /* write alarm registers */
1001 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
1005 /* enable alarm if requested */
1007 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1008 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1009 the_menelaus->rtc_control);
1015 #ifdef CONFIG_RTC_INTF_DEV
1017 static void menelaus_rtc_update_work(struct menelaus_chip *m)
1019 /* report 1/sec update */
1020 local_irq_disable();
1021 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1025 static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1029 if (the_menelaus->client->irq <= 0)
1030 return -ENOIOCTLCMD;
1035 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1037 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1040 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1042 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1044 /* 1/second "update" IRQ */
1046 if (the_menelaus->uie)
1048 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1049 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1050 menelaus_rtc_update_work);
1052 the_menelaus->uie = 1;
1055 if (!the_menelaus->uie)
1057 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1059 the_menelaus->uie = 0;
1062 return -ENOIOCTLCMD;
1064 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1068 #define menelaus_ioctl NULL
1071 /* REVISIT no compensation register support ... */
1073 static const struct rtc_class_ops menelaus_rtc_ops = {
1074 .ioctl = menelaus_ioctl,
1075 .read_time = menelaus_read_time,
1076 .set_time = menelaus_set_time,
1077 .read_alarm = menelaus_read_alarm,
1078 .set_alarm = menelaus_set_alarm,
1081 static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1084 local_irq_disable();
1085 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
1088 /* then disable it; alarms are oneshot */
1089 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1090 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1093 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1095 int alarm = (m->client->irq > 0);
1097 /* assume 32KDETEN pin is pulled high */
1098 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
1099 dev_dbg(&m->client->dev, "no 32k oscillator\n");
1103 /* support RTC alarm; it can issue wakeups */
1105 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
1106 menelaus_rtc_alarm_work) < 0) {
1107 dev_err(&m->client->dev, "can't handle RTC alarm\n");
1110 device_init_wakeup(&m->client->dev, 1);
1113 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
1114 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
1115 if (!(m->rtc_control & RTC_CTRL_RTC_EN)
1116 || (m->rtc_control & RTC_CTRL_AL_EN)
1117 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
1118 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
1119 dev_warn(&m->client->dev, "rtc clock needs setting\n");
1120 m->rtc_control |= RTC_CTRL_RTC_EN;
1122 m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
1123 m->rtc_control &= ~RTC_CTRL_AL_EN;
1124 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
1127 m->rtc = rtc_device_register(DRIVER_NAME,
1129 &menelaus_rtc_ops, THIS_MODULE);
1130 if (IS_ERR(m->rtc)) {
1132 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1133 device_init_wakeup(&m->client->dev, 0);
1135 dev_err(&m->client->dev, "can't register RTC: %d\n",
1136 (int) PTR_ERR(m->rtc));
1137 the_menelaus->rtc = NULL;
1143 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1150 /*-----------------------------------------------------------------------*/
1152 static struct i2c_driver menelaus_i2c_driver;
1154 static int menelaus_probe(struct i2c_client *client)
1156 struct menelaus_chip *menelaus;
1159 struct menelaus_platform_data *menelaus_pdata =
1160 client->dev.platform_data;
1163 dev_dbg(&client->dev, "only one %s for now\n",
1168 menelaus = kzalloc(sizeof *menelaus, GFP_KERNEL);
1172 i2c_set_clientdata(client, menelaus);
1174 the_menelaus = menelaus;
1175 menelaus->client = client;
1177 /* If a true probe check the device */
1178 rev = menelaus_read_reg(MENELAUS_REV);
1180 pr_err("device not found");
1185 /* Ack and disable all Menelaus interrupts */
1186 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
1187 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
1188 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
1189 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
1190 menelaus->mask1 = 0xff;
1191 menelaus->mask2 = 0xff;
1193 /* Set output buffer strengths */
1194 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1196 if (client->irq > 0) {
1197 err = request_irq(client->irq, menelaus_irq, IRQF_DISABLED,
1198 DRIVER_NAME, menelaus);
1200 dev_dbg(&client->dev, "can't get IRQ %d, err %d",
1206 mutex_init(&menelaus->lock);
1207 INIT_WORK(&menelaus->work, menelaus_work);
1209 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1211 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1215 menelaus->vcore_hw_mode = 1;
1217 menelaus->vcore_hw_mode = 0;
1219 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1220 err = menelaus_pdata->late_init(&client->dev);
1225 menelaus_rtc_init(menelaus);
1229 free_irq(client->irq, menelaus);
1230 flush_scheduled_work();
1236 static int __exit menelaus_remove(struct i2c_client *client)
1238 struct menelaus_chip *menelaus = i2c_get_clientdata(client);
1240 free_irq(client->irq, menelaus);
1242 i2c_set_clientdata(client, NULL);
1243 the_menelaus = NULL;
1247 static struct i2c_driver menelaus_i2c_driver = {
1249 .name = DRIVER_NAME,
1251 .probe = menelaus_probe,
1252 .remove = __exit_p(menelaus_remove),
1255 static int __init menelaus_init(void)
1259 res = i2c_add_driver(&menelaus_i2c_driver);
1261 pr_err("driver registration failed\n");
1268 static void __exit menelaus_exit(void)
1270 i2c_del_driver(&menelaus_i2c_driver);
1272 /* FIXME: Shutdown menelaus parts that can be shut down */
1275 MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1276 MODULE_DESCRIPTION("I2C interface for Menelaus.");
1277 MODULE_LICENSE("GPL");
1279 module_init(menelaus_init);
1280 module_exit(menelaus_exit);