1 // SPDX-License-Identifier: GPL-2.0-or-later
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
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>
34 #include <asm/mach/irq.h>
37 #define DRIVER_NAME "menelaus"
39 #define MENELAUS_I2C_ADDRESS 0x72
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
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 */
118 /* VCORE_CTRL1 register */
119 #define VCORE_CTRL1_BYP_COMP (1 << 5)
120 #define VCORE_CTRL1_HW_NSW (1 << 7)
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)
129 /* MCT_CTRL1 register */
130 #define MCT_CTRL1_S1_CMD_OD (1 << 2)
131 #define MCT_CTRL1_S2_CMD_OD (1 << 3)
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)
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)
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)
151 static void menelaus_work(struct work_struct *_menelaus);
153 struct menelaus_chip {
155 struct i2c_client *client;
156 struct work_struct work;
157 #ifdef CONFIG_RTC_DRV_TWL92330
158 struct rtc_device *rtc;
162 unsigned vcore_hw_mode:1;
164 void (*handlers[16])(struct menelaus_chip *);
165 void (*mmc_callback)(void *data, u8 mask);
166 void *mmc_callback_data;
169 static struct menelaus_chip *the_menelaus;
171 static int menelaus_write_reg(int reg, u8 value)
173 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
176 pr_err(DRIVER_NAME ": write error");
183 static int menelaus_read_reg(int reg)
185 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
188 pr_err(DRIVER_NAME ": read error");
193 static int menelaus_enable_irq(int irq)
197 the_menelaus->mask2 &= ~(1 << irq);
198 return menelaus_write_reg(MENELAUS_INT_MASK2,
199 the_menelaus->mask2);
201 the_menelaus->mask1 &= ~(1 << irq);
202 return menelaus_write_reg(MENELAUS_INT_MASK1,
203 the_menelaus->mask1);
207 static int menelaus_disable_irq(int irq)
211 the_menelaus->mask2 |= (1 << irq);
212 return menelaus_write_reg(MENELAUS_INT_MASK2,
213 the_menelaus->mask2);
215 the_menelaus->mask1 |= (1 << irq);
216 return menelaus_write_reg(MENELAUS_INT_MASK1,
217 the_menelaus->mask1);
221 static int menelaus_ack_irq(int irq)
224 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
226 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
229 /* Adds a handler for an interrupt. Does not run in interrupt context */
230 static int menelaus_add_irq_work(int irq,
231 void (*handler)(struct menelaus_chip *))
235 mutex_lock(&the_menelaus->lock);
236 the_menelaus->handlers[irq] = handler;
237 ret = menelaus_enable_irq(irq);
238 mutex_unlock(&the_menelaus->lock);
243 /* Removes handler for an interrupt */
244 static int menelaus_remove_irq_work(int irq)
248 mutex_lock(&the_menelaus->lock);
249 ret = menelaus_disable_irq(irq);
250 the_menelaus->handlers[irq] = NULL;
251 mutex_unlock(&the_menelaus->lock);
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
262 static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
265 unsigned char card_mask = 0;
267 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
272 card_mask |= MCT_PIN_ST_S1_CD_ST;
275 card_mask |= MCT_PIN_ST_S2_CD_ST;
277 if (menelaus_hw->mmc_callback)
278 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
283 * Toggles the MMC slots between open-drain and push-pull mode.
285 int menelaus_set_mmc_opendrain(int slot, int enable)
289 if (slot != 1 && slot != 2)
291 mutex_lock(&the_menelaus->lock);
292 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
294 mutex_unlock(&the_menelaus->lock);
300 val |= MCT_CTRL1_S1_CMD_OD;
302 val &= ~MCT_CTRL1_S1_CMD_OD;
305 val |= MCT_CTRL1_S2_CMD_OD;
307 val &= ~MCT_CTRL1_S2_CMD_OD;
309 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
310 mutex_unlock(&the_menelaus->lock);
314 EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
316 int menelaus_set_slot_sel(int enable)
320 mutex_lock(&the_menelaus->lock);
321 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
324 ret |= GPIO2_DIR_INPUT;
326 ret |= GPIO_CTRL_SLOTSELEN;
328 ret &= ~GPIO_CTRL_SLOTSELEN;
329 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
331 mutex_unlock(&the_menelaus->lock);
334 EXPORT_SYMBOL(menelaus_set_slot_sel);
336 int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
340 if (slot != 1 && slot != 2)
345 mutex_lock(&the_menelaus->lock);
347 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
353 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;
355 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);
358 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;
360 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);
362 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
366 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
372 val |= MCT_CTRL3_SLOT1_EN;
374 val &= ~MCT_CTRL3_SLOT1_EN;
379 val |= MCT_CTRL3_SLOT2_EN;
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);
385 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
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);
393 mutex_unlock(&the_menelaus->lock);
396 EXPORT_SYMBOL(menelaus_set_mmc_slot);
398 int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
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);
409 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
410 menelaus_mmc_cd_work);
413 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
414 menelaus_mmc_cd_work);
417 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
418 menelaus_mmc_cd_work);
422 EXPORT_SYMBOL(menelaus_register_mmc_callback);
424 void menelaus_unregister_mmc_callback(void)
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);
431 the_menelaus->mmc_callback = NULL;
432 the_menelaus->mmc_callback_data = NULL;
434 EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
436 struct menelaus_vtg {
444 struct menelaus_vtg_value {
449 static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
450 int vtg_val, int mode)
453 struct i2c_client *c = the_menelaus->client;
455 mutex_lock(&the_menelaus->lock);
457 ret = menelaus_read_reg(vtg->vtg_reg);
460 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
461 val |= vtg_val << vtg->vtg_shift;
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);
467 ret = menelaus_write_reg(vtg->vtg_reg, val);
470 ret = menelaus_write_reg(vtg->mode_reg, mode);
472 mutex_unlock(&the_menelaus->lock);
474 /* Wait for voltage to stabilize */
480 static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
485 for (i = 0; i < n; i++, tbl++)
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
497 * Call correct 'set' function accordingly
500 static const struct menelaus_vtg_value vcore_values[] = {
522 int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
524 int fval, rval, val, ret;
525 struct i2c_client *c = the_menelaus->client;
527 rval = menelaus_get_vtg_value(roof_mV, vcore_values,
528 ARRAY_SIZE(vcore_values));
531 fval = menelaus_get_vtg_value(floor_mV, vcore_values,
532 ARRAY_SIZE(vcore_values));
536 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
539 mutex_lock(&the_menelaus->lock);
540 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
543 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
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;
555 mutex_unlock(&the_menelaus->lock);
559 static const struct menelaus_vtg vmem_vtg = {
561 .vtg_reg = MENELAUS_LDO_CTRL1,
564 .mode_reg = MENELAUS_LDO_CTRL3,
567 static const struct menelaus_vtg_value vmem_values[] = {
574 int menelaus_set_vmem(unsigned int mV)
579 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
581 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
584 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
586 EXPORT_SYMBOL(menelaus_set_vmem);
588 static const struct menelaus_vtg vio_vtg = {
590 .vtg_reg = MENELAUS_LDO_CTRL1,
593 .mode_reg = MENELAUS_LDO_CTRL4,
596 static const struct menelaus_vtg_value vio_values[] = {
603 int menelaus_set_vio(unsigned int mV)
608 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
610 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
613 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
615 EXPORT_SYMBOL(menelaus_set_vio);
617 static const struct menelaus_vtg_value vdcdc_values[] = {
628 static const struct menelaus_vtg vdcdc2_vtg = {
630 .vtg_reg = MENELAUS_DCDC_CTRL1,
633 .mode_reg = MENELAUS_DCDC_CTRL2,
636 static const struct menelaus_vtg vdcdc3_vtg = {
638 .vtg_reg = MENELAUS_DCDC_CTRL1,
641 .mode_reg = MENELAUS_DCDC_CTRL3,
644 int menelaus_set_vdcdc(int dcdc, unsigned int mV)
646 const struct menelaus_vtg *vtg;
649 if (dcdc != 2 && dcdc != 3)
657 return menelaus_set_voltage(vtg, 0, 0, 0);
659 val = menelaus_get_vtg_value(mV, vdcdc_values,
660 ARRAY_SIZE(vdcdc_values));
663 return menelaus_set_voltage(vtg, mV, val, 0x03);
666 static const struct menelaus_vtg_value vmmc_values[] = {
673 static const struct menelaus_vtg vmmc_vtg = {
675 .vtg_reg = MENELAUS_LDO_CTRL1,
678 .mode_reg = MENELAUS_LDO_CTRL7,
681 int menelaus_set_vmmc(unsigned int mV)
686 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
688 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
691 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
693 EXPORT_SYMBOL(menelaus_set_vmmc);
696 static const struct menelaus_vtg_value vaux_values[] = {
703 static const struct menelaus_vtg vaux_vtg = {
705 .vtg_reg = MENELAUS_LDO_CTRL1,
708 .mode_reg = MENELAUS_LDO_CTRL6,
711 int menelaus_set_vaux(unsigned int mV)
716 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
718 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
721 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
723 EXPORT_SYMBOL(menelaus_set_vaux);
725 int menelaus_get_slot_pin_states(void)
727 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
729 EXPORT_SYMBOL(menelaus_get_slot_pin_states);
731 int menelaus_set_regulator_sleep(int enable, u32 val)
734 struct i2c_client *c = the_menelaus->client;
736 mutex_lock(&the_menelaus->lock);
737 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
741 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
743 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
746 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);
751 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
753 mutex_unlock(&the_menelaus->lock);
757 /*-----------------------------------------------------------------------*/
759 /* Handles Menelaus interrupts. Does not run in interrupt context */
760 static void menelaus_work(struct work_struct *_menelaus)
762 struct menelaus_chip *menelaus =
763 container_of(_menelaus, struct menelaus_chip, work);
764 void (*handler)(struct menelaus_chip *menelaus);
769 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
770 & ~menelaus->mask2) << 8;
771 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
777 int irq = fls(isr) - 1;
780 mutex_lock(&menelaus->lock);
781 menelaus_disable_irq(irq);
782 menelaus_ack_irq(irq);
783 handler = menelaus->handlers[irq];
786 menelaus_enable_irq(irq);
787 mutex_unlock(&menelaus->lock);
790 enable_irq(menelaus->client->irq);
794 * We cannot use I2C in interrupt context, so we just schedule work.
796 static irqreturn_t menelaus_irq(int irq, void *_menelaus)
798 struct menelaus_chip *menelaus = _menelaus;
800 disable_irq_nosync(irq);
801 (void)schedule_work(&menelaus->work);
806 /*-----------------------------------------------------------------------*/
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.
813 #ifdef CONFIG_RTC_DRV_TWL92330
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)
824 #define RTC_UPDATE_EVERY 0x08
826 #define RTC_HR_PM (1 << 7)
828 static void menelaus_to_time(char *regs, struct rtc_time *t)
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)
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;
843 static int time_to_menelaus(struct rtc_time *t, int regnum)
847 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));
851 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));
855 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
856 hour = t->tm_hour + 1;
858 hour = RTC_HR_PM | bin2bcd(hour - 12);
860 hour = bin2bcd(hour);
862 hour = bin2bcd(t->tm_hour);
863 status = menelaus_write_reg(regnum++, hour);
867 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));
871 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));
875 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));
881 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
886 static int menelaus_read_time(struct device *dev, struct rtc_time *t)
888 struct i2c_msg msg[2];
892 /* block read date and time registers */
893 regs[0] = MENELAUS_RTC_SEC;
895 msg[0].addr = MENELAUS_I2C_ADDRESS;
900 msg[1].addr = MENELAUS_I2C_ADDRESS;
901 msg[1].flags = I2C_M_RD;
902 msg[1].len = sizeof(regs);
905 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
907 dev_err(dev, "%s error %d\n", "read", status);
911 menelaus_to_time(regs, t);
912 t->tm_wday = bcd2bin(regs[6]);
917 static int menelaus_set_time(struct device *dev, struct rtc_time *t)
921 /* write date and time registers */
922 status = time_to_menelaus(t, MENELAUS_RTC_SEC);
925 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));
927 dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
928 "err %d\n", MENELAUS_RTC_WKDAY, status);
932 /* now commit the write */
933 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
935 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
941 static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
943 struct i2c_msg msg[2];
947 /* block read alarm registers */
948 regs[0] = MENELAUS_RTC_AL_SEC;
950 msg[0].addr = MENELAUS_I2C_ADDRESS;
955 msg[1].addr = MENELAUS_I2C_ADDRESS;
956 msg[1].flags = I2C_M_RD;
957 msg[1].len = sizeof(regs);
960 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
962 dev_err(dev, "%s error %d\n", "alarm read", status);
966 menelaus_to_time(regs, &w->time);
968 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
970 /* NOTE we *could* check if actually pending... */
976 static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
980 if (the_menelaus->client->irq <= 0 && w->enabled)
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);
992 /* write alarm registers */
993 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
997 /* enable alarm if requested */
999 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1000 status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1001 the_menelaus->rtc_control);
1007 #ifdef CONFIG_RTC_INTF_DEV
1009 static void menelaus_rtc_update_work(struct menelaus_chip *m)
1011 /* report 1/sec update */
1012 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1015 static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1019 if (the_menelaus->client->irq <= 0)
1020 return -ENOIOCTLCMD;
1025 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1027 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1030 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1032 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1034 /* 1/second "update" IRQ */
1036 if (the_menelaus->uie)
1038 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1039 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1040 menelaus_rtc_update_work);
1042 the_menelaus->uie = 1;
1045 if (!the_menelaus->uie)
1047 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1049 the_menelaus->uie = 0;
1052 return -ENOIOCTLCMD;
1054 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1058 #define menelaus_ioctl NULL
1061 /* REVISIT no compensation register support ... */
1063 static 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,
1071 static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1074 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
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);
1081 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1083 int alarm = (m->client->irq > 0);
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");
1092 m->rtc = devm_rtc_allocate_device(&m->client->dev);
1096 m->rtc->ops = &menelaus_rtc_ops;
1098 /* support RTC alarm; it can issue wakeups */
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");
1105 device_init_wakeup(&m->client->dev, 1);
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;
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);
1122 err = devm_rtc_register_device(m->rtc);
1125 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1126 device_init_wakeup(&m->client->dev, 0);
1128 the_menelaus->rtc = NULL;
1134 static inline void menelaus_rtc_init(struct menelaus_chip *m)
1141 /*-----------------------------------------------------------------------*/
1143 static struct i2c_driver menelaus_i2c_driver;
1145 static int menelaus_probe(struct i2c_client *client,
1146 const struct i2c_device_id *id)
1148 struct menelaus_chip *menelaus;
1151 struct menelaus_platform_data *menelaus_pdata =
1152 dev_get_platdata(&client->dev);
1155 dev_dbg(&client->dev, "only one %s for now\n",
1160 menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL);
1164 i2c_set_clientdata(client, menelaus);
1166 the_menelaus = menelaus;
1167 menelaus->client = client;
1169 /* If a true probe check the device */
1170 rev = menelaus_read_reg(MENELAUS_REV);
1172 pr_err(DRIVER_NAME ": device not found");
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;
1184 /* Set output buffer strengths */
1185 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1187 if (client->irq > 0) {
1188 err = request_irq(client->irq, menelaus_irq, 0,
1189 DRIVER_NAME, menelaus);
1191 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
1197 mutex_init(&menelaus->lock);
1198 INIT_WORK(&menelaus->work, menelaus_work);
1200 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1202 err = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1205 if (err & VCORE_CTRL1_HW_NSW)
1206 menelaus->vcore_hw_mode = 1;
1208 menelaus->vcore_hw_mode = 0;
1210 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1211 err = menelaus_pdata->late_init(&client->dev);
1216 menelaus_rtc_init(menelaus);
1220 free_irq(client->irq, menelaus);
1221 flush_work(&menelaus->work);
1225 static void menelaus_remove(struct i2c_client *client)
1227 struct menelaus_chip *menelaus = i2c_get_clientdata(client);
1229 free_irq(client->irq, menelaus);
1230 flush_work(&menelaus->work);
1231 the_menelaus = NULL;
1234 static const struct i2c_device_id menelaus_id[] = {
1238 MODULE_DEVICE_TABLE(i2c, menelaus_id);
1240 static struct i2c_driver menelaus_i2c_driver = {
1242 .name = DRIVER_NAME,
1244 .probe = menelaus_probe,
1245 .remove = menelaus_remove,
1246 .id_table = menelaus_id,
1249 module_i2c_driver(menelaus_i2c_driver);
1251 MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1252 MODULE_DESCRIPTION("I2C interface for Menelaus.");
1253 MODULE_LICENSE("GPL");