diff options
Diffstat (limited to 'drivers/mfd/menelaus.c')
| -rw-r--r-- | drivers/mfd/menelaus.c | 1269 |
1 files changed, 1269 insertions, 0 deletions
diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c new file mode 100644 index 000000000..d28ebe7ec --- /dev/null +++ b/drivers/mfd/menelaus.c @@ -0,0 +1,1269 @@ +/* + * Copyright (C) 2004 Texas Instruments, Inc. + * + * Some parts based tps65010.c: + * Copyright (C) 2004 Texas Instruments and + * Copyright (C) 2004-2005 David Brownell + * + * Some parts based on tlv320aic24.c: + * Copyright (C) by Kai Svahn <kai.svahn@nokia.com> + * + * Changes for interrupt handling and clean-up by + * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com> + * Cleanup and generalized support for voltage setting by + * Juha Yrjola + * Added support for controlling VCORE and regulator sleep states, + * Amit Kucheria <amit.kucheria@nokia.com> + * Copyright (C) 2005, 2006 Nokia Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/mutex.h> +#include <linux/workqueue.h> +#include <linux/delay.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/slab.h> +#include <linux/mfd/menelaus.h> +#include <linux/gpio.h> + +#include <asm/mach/irq.h> + + +#define DRIVER_NAME "menelaus" + +#define MENELAUS_I2C_ADDRESS 0x72 + +#define MENELAUS_REV 0x01 +#define MENELAUS_VCORE_CTRL1 0x02 +#define MENELAUS_VCORE_CTRL2 0x03 +#define MENELAUS_VCORE_CTRL3 0x04 +#define MENELAUS_VCORE_CTRL4 0x05 +#define MENELAUS_VCORE_CTRL5 0x06 +#define MENELAUS_DCDC_CTRL1 0x07 +#define MENELAUS_DCDC_CTRL2 0x08 +#define MENELAUS_DCDC_CTRL3 0x09 +#define MENELAUS_LDO_CTRL1 0x0A +#define MENELAUS_LDO_CTRL2 0x0B +#define MENELAUS_LDO_CTRL3 0x0C +#define MENELAUS_LDO_CTRL4 0x0D +#define MENELAUS_LDO_CTRL5 0x0E +#define MENELAUS_LDO_CTRL6 0x0F +#define MENELAUS_LDO_CTRL7 0x10 +#define MENELAUS_LDO_CTRL8 0x11 +#define MENELAUS_SLEEP_CTRL1 0x12 +#define MENELAUS_SLEEP_CTRL2 0x13 +#define MENELAUS_DEVICE_OFF 0x14 +#define MENELAUS_OSC_CTRL 0x15 +#define MENELAUS_DETECT_CTRL 0x16 +#define MENELAUS_INT_MASK1 0x17 +#define MENELAUS_INT_MASK2 0x18 +#define MENELAUS_INT_STATUS1 0x19 +#define MENELAUS_INT_STATUS2 0x1A +#define MENELAUS_INT_ACK1 0x1B +#define MENELAUS_INT_ACK2 0x1C +#define MENELAUS_GPIO_CTRL 0x1D +#define MENELAUS_GPIO_IN 0x1E +#define MENELAUS_GPIO_OUT 0x1F +#define MENELAUS_BBSMS 0x20 +#define MENELAUS_RTC_CTRL 0x21 +#define MENELAUS_RTC_UPDATE 0x22 +#define MENELAUS_RTC_SEC 0x23 +#define MENELAUS_RTC_MIN 0x24 +#define MENELAUS_RTC_HR 0x25 +#define MENELAUS_RTC_DAY 0x26 +#define MENELAUS_RTC_MON 0x27 +#define MENELAUS_RTC_YR 0x28 +#define MENELAUS_RTC_WKDAY 0x29 +#define MENELAUS_RTC_AL_SEC 0x2A +#define MENELAUS_RTC_AL_MIN 0x2B +#define MENELAUS_RTC_AL_HR 0x2C +#define MENELAUS_RTC_AL_DAY 0x2D +#define MENELAUS_RTC_AL_MON 0x2E +#define MENELAUS_RTC_AL_YR 0x2F +#define MENELAUS_RTC_COMP_MSB 0x30 +#define MENELAUS_RTC_COMP_LSB 0x31 +#define MENELAUS_S1_PULL_EN 0x32 +#define MENELAUS_S1_PULL_DIR 0x33 +#define MENELAUS_S2_PULL_EN 0x34 +#define MENELAUS_S2_PULL_DIR 0x35 +#define MENELAUS_MCT_CTRL1 0x36 +#define MENELAUS_MCT_CTRL2 0x37 +#define MENELAUS_MCT_CTRL3 0x38 +#define MENELAUS_MCT_PIN_ST 0x39 +#define MENELAUS_DEBOUNCE1 0x3A + +#define IH_MENELAUS_IRQS 12 +#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */ +#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */ +#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */ +#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */ +#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */ +#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */ +#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */ +#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */ +#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */ +#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */ +#define MENELAUS_RTCERR_IRQ 10 /* RTC error */ +#define MENELAUS_PSHBTN_IRQ 11 /* Push button */ +#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */ +#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */ +#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */ +#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */ + +/* VCORE_CTRL1 register */ +#define VCORE_CTRL1_BYP_COMP (1 << 5) +#define VCORE_CTRL1_HW_NSW (1 << 7) + +/* GPIO_CTRL register */ +#define GPIO_CTRL_SLOTSELEN (1 << 5) +#define GPIO_CTRL_SLPCTLEN (1 << 6) +#define GPIO1_DIR_INPUT (1 << 0) +#define GPIO2_DIR_INPUT (1 << 1) +#define GPIO3_DIR_INPUT (1 << 2) + +/* MCT_CTRL1 register */ +#define MCT_CTRL1_S1_CMD_OD (1 << 2) +#define MCT_CTRL1_S2_CMD_OD (1 << 3) + +/* MCT_CTRL2 register */ +#define MCT_CTRL2_VS2_SEL_D0 (1 << 0) +#define MCT_CTRL2_VS2_SEL_D1 (1 << 1) +#define MCT_CTRL2_S1CD_BUFEN (1 << 4) +#define MCT_CTRL2_S2CD_BUFEN (1 << 5) +#define MCT_CTRL2_S1CD_DBEN (1 << 6) +#define MCT_CTRL2_S2CD_BEN (1 << 7) + +/* MCT_CTRL3 register */ +#define MCT_CTRL3_SLOT1_EN (1 << 0) +#define MCT_CTRL3_SLOT2_EN (1 << 1) +#define MCT_CTRL3_S1_AUTO_EN (1 << 2) +#define MCT_CTRL3_S2_AUTO_EN (1 << 3) + +/* MCT_PIN_ST register */ +#define MCT_PIN_ST_S1_CD_ST (1 << 0) +#define MCT_PIN_ST_S2_CD_ST (1 << 1) + +static void menelaus_work(struct work_struct *_menelaus); + +struct menelaus_chip { + struct mutex lock; + struct i2c_client *client; + struct work_struct work; +#ifdef CONFIG_RTC_DRV_TWL92330 + struct rtc_device *rtc; + u8 rtc_control; + unsigned uie:1; +#endif + unsigned vcore_hw_mode:1; + u8 mask1, mask2; + void (*handlers[16])(struct menelaus_chip *); + void (*mmc_callback)(void *data, u8 mask); + void *mmc_callback_data; +}; + +static struct menelaus_chip *the_menelaus; + +static int menelaus_write_reg(int reg, u8 value) +{ + int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value); + + if (val < 0) { + pr_err(DRIVER_NAME ": write error"); + return val; + } + + return 0; +} + +static int menelaus_read_reg(int reg) +{ + int val = i2c_smbus_read_byte_data(the_menelaus->client, reg); + + if (val < 0) + pr_err(DRIVER_NAME ": read error"); + + return val; +} + +static int menelaus_enable_irq(int irq) +{ + if (irq > 7) { + irq -= 8; + the_menelaus->mask2 &= ~(1 << irq); + return menelaus_write_reg(MENELAUS_INT_MASK2, + the_menelaus->mask2); + } else { + the_menelaus->mask1 &= ~(1 << irq); + return menelaus_write_reg(MENELAUS_INT_MASK1, + the_menelaus->mask1); + } +} + +static int menelaus_disable_irq(int irq) +{ + if (irq > 7) { + irq -= 8; + the_menelaus->mask2 |= (1 << irq); + return menelaus_write_reg(MENELAUS_INT_MASK2, + the_menelaus->mask2); + } else { + the_menelaus->mask1 |= (1 << irq); + return menelaus_write_reg(MENELAUS_INT_MASK1, + the_menelaus->mask1); + } +} + +static int menelaus_ack_irq(int irq) +{ + if (irq > 7) + return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8)); + else + return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq); +} + +/* Adds a handler for an interrupt. Does not run in interrupt context */ +static int menelaus_add_irq_work(int irq, + void (*handler)(struct menelaus_chip *)) +{ + int ret = 0; + + mutex_lock(&the_menelaus->lock); + the_menelaus->handlers[irq] = handler; + ret = menelaus_enable_irq(irq); + mutex_unlock(&the_menelaus->lock); + + return ret; +} + +/* Removes handler for an interrupt */ +static int menelaus_remove_irq_work(int irq) +{ + int ret = 0; + + mutex_lock(&the_menelaus->lock); + ret = menelaus_disable_irq(irq); + the_menelaus->handlers[irq] = NULL; + mutex_unlock(&the_menelaus->lock); + + return ret; +} + +/* + * Gets scheduled when a card detect interrupt happens. Note that in some cases + * this line is wired to card cover switch rather than the card detect switch + * in each slot. In this case the cards are not seen by menelaus. + * FIXME: Add handling for D1 too + */ +static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw) +{ + int reg; + unsigned char card_mask = 0; + + reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST); + if (reg < 0) + return; + + if (!(reg & 0x1)) + card_mask |= MCT_PIN_ST_S1_CD_ST; + + if (!(reg & 0x2)) + card_mask |= MCT_PIN_ST_S2_CD_ST; + + if (menelaus_hw->mmc_callback) + menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data, + card_mask); +} + +/* + * Toggles the MMC slots between open-drain and push-pull mode. + */ +int menelaus_set_mmc_opendrain(int slot, int enable) +{ + int ret, val; + + if (slot != 1 && slot != 2) + return -EINVAL; + mutex_lock(&the_menelaus->lock); + ret = menelaus_read_reg(MENELAUS_MCT_CTRL1); + if (ret < 0) { + mutex_unlock(&the_menelaus->lock); + return ret; + } + val = ret; + if (slot == 1) { + if (enable) + val |= MCT_CTRL1_S1_CMD_OD; + else + val &= ~MCT_CTRL1_S1_CMD_OD; + } else { + if (enable) + val |= MCT_CTRL1_S2_CMD_OD; + else + val &= ~MCT_CTRL1_S2_CMD_OD; + } + ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val); + mutex_unlock(&the_menelaus->lock); + + return ret; +} +EXPORT_SYMBOL(menelaus_set_mmc_opendrain); + +int menelaus_set_slot_sel(int enable) +{ + int ret; + + mutex_lock(&the_menelaus->lock); + ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); + if (ret < 0) + goto out; + ret |= GPIO2_DIR_INPUT; + if (enable) + ret |= GPIO_CTRL_SLOTSELEN; + else + ret &= ~GPIO_CTRL_SLOTSELEN; + ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); +out: + mutex_unlock(&the_menelaus->lock); + return ret; +} +EXPORT_SYMBOL(menelaus_set_slot_sel); + +int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en) +{ + int ret, val; + + if (slot != 1 && slot != 2) + return -EINVAL; + if (power >= 3) + return -EINVAL; + + mutex_lock(&the_menelaus->lock); + + ret = menelaus_read_reg(MENELAUS_MCT_CTRL2); + if (ret < 0) + goto out; + val = ret; + if (slot == 1) { + if (cd_en) + val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN; + else + val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN); + } else { + if (cd_en) + val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN; + else + val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN); + } + ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val); + if (ret < 0) + goto out; + + ret = menelaus_read_reg(MENELAUS_MCT_CTRL3); + if (ret < 0) + goto out; + val = ret; + if (slot == 1) { + if (enable) + val |= MCT_CTRL3_SLOT1_EN; + else + val &= ~MCT_CTRL3_SLOT1_EN; + } else { + int b; + + if (enable) + val |= MCT_CTRL3_SLOT2_EN; + else + val &= ~MCT_CTRL3_SLOT2_EN; + b = menelaus_read_reg(MENELAUS_MCT_CTRL2); + b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1); + b |= power; + ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b); + if (ret < 0) + goto out; + } + /* Disable autonomous shutdown */ + val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN); + ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val); +out: + mutex_unlock(&the_menelaus->lock); + return ret; +} +EXPORT_SYMBOL(menelaus_set_mmc_slot); + +int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask), + void *data) +{ + int ret = 0; + + the_menelaus->mmc_callback_data = data; + the_menelaus->mmc_callback = callback; + ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ, + menelaus_mmc_cd_work); + if (ret < 0) + return ret; + ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ, + menelaus_mmc_cd_work); + if (ret < 0) + return ret; + ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ, + menelaus_mmc_cd_work); + if (ret < 0) + return ret; + ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ, + menelaus_mmc_cd_work); + + return ret; +} +EXPORT_SYMBOL(menelaus_register_mmc_callback); + +void menelaus_unregister_mmc_callback(void) +{ + menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ); + menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ); + menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ); + menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ); + + the_menelaus->mmc_callback = NULL; + the_menelaus->mmc_callback_data = NULL; +} +EXPORT_SYMBOL(menelaus_unregister_mmc_callback); + +struct menelaus_vtg { + const char *name; + u8 vtg_reg; + u8 vtg_shift; + u8 vtg_bits; + u8 mode_reg; +}; + +struct menelaus_vtg_value { + u16 vtg; + u16 val; +}; + +static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV, + int vtg_val, int mode) +{ + int val, ret; + struct i2c_client *c = the_menelaus->client; + + mutex_lock(&the_menelaus->lock); + + ret = menelaus_read_reg(vtg->vtg_reg); + if (ret < 0) + goto out; + val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift); + val |= vtg_val << vtg->vtg_shift; + + dev_dbg(&c->dev, "Setting voltage '%s'" + "to %d mV (reg 0x%02x, val 0x%02x)\n", + vtg->name, mV, vtg->vtg_reg, val); + + ret = menelaus_write_reg(vtg->vtg_reg, val); + if (ret < 0) + goto out; + ret = menelaus_write_reg(vtg->mode_reg, mode); +out: + mutex_unlock(&the_menelaus->lock); + if (ret == 0) { + /* Wait for voltage to stabilize */ + msleep(1); + } + return ret; +} + +static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl, + int n) +{ + int i; + + for (i = 0; i < n; i++, tbl++) + if (tbl->vtg == vtg) + return tbl->val; + return -EINVAL; +} + +/* + * Vcore can be programmed in two ways: + * SW-controlled: Required voltage is programmed into VCORE_CTRL1 + * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3 + * and VCORE_CTRL4 + * + * Call correct 'set' function accordingly + */ + +static const struct menelaus_vtg_value vcore_values[] = { + { 1000, 0 }, + { 1025, 1 }, + { 1050, 2 }, + { 1075, 3 }, + { 1100, 4 }, + { 1125, 5 }, + { 1150, 6 }, + { 1175, 7 }, + { 1200, 8 }, + { 1225, 9 }, + { 1250, 10 }, + { 1275, 11 }, + { 1300, 12 }, + { 1325, 13 }, + { 1350, 14 }, + { 1375, 15 }, + { 1400, 16 }, + { 1425, 17 }, + { 1450, 18 }, +}; + +int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV) +{ + int fval, rval, val, ret; + struct i2c_client *c = the_menelaus->client; + + rval = menelaus_get_vtg_value(roof_mV, vcore_values, + ARRAY_SIZE(vcore_values)); + if (rval < 0) + return -EINVAL; + fval = menelaus_get_vtg_value(floor_mV, vcore_values, + ARRAY_SIZE(vcore_values)); + if (fval < 0) + return -EINVAL; + + dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n", + floor_mV, roof_mV); + + mutex_lock(&the_menelaus->lock); + ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval); + if (ret < 0) + goto out; + ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval); + if (ret < 0) + goto out; + if (!the_menelaus->vcore_hw_mode) { + val = menelaus_read_reg(MENELAUS_VCORE_CTRL1); + /* HW mode, turn OFF byte comparator */ + val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP); + ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val); + the_menelaus->vcore_hw_mode = 1; + } + msleep(1); +out: + mutex_unlock(&the_menelaus->lock); + return ret; +} + +static const struct menelaus_vtg vmem_vtg = { + .name = "VMEM", + .vtg_reg = MENELAUS_LDO_CTRL1, + .vtg_shift = 0, + .vtg_bits = 2, + .mode_reg = MENELAUS_LDO_CTRL3, +}; + +static const struct menelaus_vtg_value vmem_values[] = { + { 1500, 0 }, + { 1800, 1 }, + { 1900, 2 }, + { 2500, 3 }, +}; + +int menelaus_set_vmem(unsigned int mV) +{ + int val; + + if (mV == 0) + return menelaus_set_voltage(&vmem_vtg, 0, 0, 0); + + val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values)); + if (val < 0) + return -EINVAL; + return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02); +} +EXPORT_SYMBOL(menelaus_set_vmem); + +static const struct menelaus_vtg vio_vtg = { + .name = "VIO", + .vtg_reg = MENELAUS_LDO_CTRL1, + .vtg_shift = 2, + .vtg_bits = 2, + .mode_reg = MENELAUS_LDO_CTRL4, +}; + +static const struct menelaus_vtg_value vio_values[] = { + { 1500, 0 }, + { 1800, 1 }, + { 2500, 2 }, + { 2800, 3 }, +}; + +int menelaus_set_vio(unsigned int mV) +{ + int val; + + if (mV == 0) + return menelaus_set_voltage(&vio_vtg, 0, 0, 0); + + val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values)); + if (val < 0) + return -EINVAL; + return menelaus_set_voltage(&vio_vtg, mV, val, 0x02); +} +EXPORT_SYMBOL(menelaus_set_vio); + +static const struct menelaus_vtg_value vdcdc_values[] = { + { 1500, 0 }, + { 1800, 1 }, + { 2000, 2 }, + { 2200, 3 }, + { 2400, 4 }, + { 2800, 5 }, + { 3000, 6 }, + { 3300, 7 }, +}; + +static const struct menelaus_vtg vdcdc2_vtg = { + .name = "VDCDC2", + .vtg_reg = MENELAUS_DCDC_CTRL1, + .vtg_shift = 0, + .vtg_bits = 3, + .mode_reg = MENELAUS_DCDC_CTRL2, +}; + +static const struct menelaus_vtg vdcdc3_vtg = { + .name = "VDCDC3", + .vtg_reg = MENELAUS_DCDC_CTRL1, + .vtg_shift = 3, + .vtg_bits = 3, + .mode_reg = MENELAUS_DCDC_CTRL3, +}; + +int menelaus_set_vdcdc(int dcdc, unsigned int mV) +{ + const struct menelaus_vtg *vtg; + int val; + + if (dcdc != 2 && dcdc != 3) + return -EINVAL; + if (dcdc == 2) + vtg = &vdcdc2_vtg; + else + vtg = &vdcdc3_vtg; + + if (mV == 0) + return menelaus_set_voltage(vtg, 0, 0, 0); + + val = menelaus_get_vtg_value(mV, vdcdc_values, + ARRAY_SIZE(vdcdc_values)); + if (val < 0) + return -EINVAL; + return menelaus_set_voltage(vtg, mV, val, 0x03); +} + +static const struct menelaus_vtg_value vmmc_values[] = { + { 1850, 0 }, + { 2800, 1 }, + { 3000, 2 }, + { 3100, 3 }, +}; + +static const struct menelaus_vtg vmmc_vtg = { + .name = "VMMC", + .vtg_reg = MENELAUS_LDO_CTRL1, + .vtg_shift = 6, + .vtg_bits = 2, + .mode_reg = MENELAUS_LDO_CTRL7, +}; + +int menelaus_set_vmmc(unsigned int mV) +{ + int val; + + if (mV == 0) + return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0); + + val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values)); + if (val < 0) + return -EINVAL; + return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02); +} +EXPORT_SYMBOL(menelaus_set_vmmc); + + +static const struct menelaus_vtg_value vaux_values[] = { + { 1500, 0 }, + { 1800, 1 }, + { 2500, 2 }, + { 2800, 3 }, +}; + +static const struct menelaus_vtg vaux_vtg = { + .name = "VAUX", + .vtg_reg = MENELAUS_LDO_CTRL1, + .vtg_shift = 4, + .vtg_bits = 2, + .mode_reg = MENELAUS_LDO_CTRL6, +}; + +int menelaus_set_vaux(unsigned int mV) +{ + int val; + + if (mV == 0) + return menelaus_set_voltage(&vaux_vtg, 0, 0, 0); + + val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values)); + if (val < 0) + return -EINVAL; + return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02); +} +EXPORT_SYMBOL(menelaus_set_vaux); + +int menelaus_get_slot_pin_states(void) +{ + return menelaus_read_reg(MENELAUS_MCT_PIN_ST); +} +EXPORT_SYMBOL(menelaus_get_slot_pin_states); + +int menelaus_set_regulator_sleep(int enable, u32 val) +{ + int t, ret; + struct i2c_client *c = the_menelaus->client; + + mutex_lock(&the_menelaus->lock); + ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val); + if (ret < 0) + goto out; + + dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val); + + ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); + if (ret < 0) + goto out; + t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT); + if (enable) + ret |= t; + else + ret &= ~t; + ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); +out: + mutex_unlock(&the_menelaus->lock); + return ret; +} + +/*-----------------------------------------------------------------------*/ + +/* Handles Menelaus interrupts. Does not run in interrupt context */ +static void menelaus_work(struct work_struct *_menelaus) +{ + struct menelaus_chip *menelaus = + container_of(_menelaus, struct menelaus_chip, work); + void (*handler)(struct menelaus_chip *menelaus); + + while (1) { + unsigned isr; + + isr = (menelaus_read_reg(MENELAUS_INT_STATUS2) + & ~menelaus->mask2) << 8; + isr |= menelaus_read_reg(MENELAUS_INT_STATUS1) + & ~menelaus->mask1; + if (!isr) + break; + + while (isr) { + int irq = fls(isr) - 1; + isr &= ~(1 << irq); + + mutex_lock(&menelaus->lock); + menelaus_disable_irq(irq); + menelaus_ack_irq(irq); + handler = menelaus->handlers[irq]; + if (handler) + handler(menelaus); + menelaus_enable_irq(irq); + mutex_unlock(&menelaus->lock); + } + } + enable_irq(menelaus->client->irq); +} + +/* + * We cannot use I2C in interrupt context, so we just schedule work. + */ +static irqreturn_t menelaus_irq(int irq, void *_menelaus) +{ + struct menelaus_chip *menelaus = _menelaus; + + disable_irq_nosync(irq); + (void)schedule_work(&menelaus->work); + + return IRQ_HANDLED; +} + +/*-----------------------------------------------------------------------*/ + +/* + * The RTC needs to be set once, then it runs on backup battery power. + * It supports alarms, including system wake alarms (from some modes); + * and 1/second IRQs if requested. + */ +#ifdef CONFIG_RTC_DRV_TWL92330 + +#define RTC_CTRL_RTC_EN (1 << 0) +#define RTC_CTRL_AL_EN (1 << 1) +#define RTC_CTRL_MODE12 (1 << 2) +#define RTC_CTRL_EVERY_MASK (3 << 3) +#define RTC_CTRL_EVERY_SEC (0 << 3) +#define RTC_CTRL_EVERY_MIN (1 << 3) +#define RTC_CTRL_EVERY_HR (2 << 3) +#define RTC_CTRL_EVERY_DAY (3 << 3) + +#define RTC_UPDATE_EVERY 0x08 + +#define RTC_HR_PM (1 << 7) + +static void menelaus_to_time(char *regs, struct rtc_time *t) +{ + t->tm_sec = bcd2bin(regs[0]); + t->tm_min = bcd2bin(regs[1]); + if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { + t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1; + if (regs[2] & RTC_HR_PM) + t->tm_hour += 12; + } else + t->tm_hour = bcd2bin(regs[2] & 0x3f); + t->tm_mday = bcd2bin(regs[3]); + t->tm_mon = bcd2bin(regs[4]) - 1; + t->tm_year = bcd2bin(regs[5]) + 100; +} + +static int time_to_menelaus(struct rtc_time *t, int regnum) +{ + int hour, status; + + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec)); + if (status < 0) + goto fail; + + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min)); + if (status < 0) + goto fail; + + if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { + hour = t->tm_hour + 1; + if (hour > 12) + hour = RTC_HR_PM | bin2bcd(hour - 12); + else + hour = bin2bcd(hour); + } else + hour = bin2bcd(t->tm_hour); + status = menelaus_write_reg(regnum++, hour); + if (status < 0) + goto fail; + + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday)); + if (status < 0) + goto fail; + + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1)); + if (status < 0) + goto fail; + + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100)); + if (status < 0) + goto fail; + + return 0; +fail: + dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n", + --regnum, status); + return status; +} + +static int menelaus_read_time(struct device *dev, struct rtc_time *t) +{ + struct i2c_msg msg[2]; + char regs[7]; + int status; + + /* block read date and time registers */ + regs[0] = MENELAUS_RTC_SEC; + + msg[0].addr = MENELAUS_I2C_ADDRESS; + msg[0].flags = 0; + msg[0].len = 1; + msg[0].buf = regs; + + msg[1].addr = MENELAUS_I2C_ADDRESS; + msg[1].flags = I2C_M_RD; + msg[1].len = sizeof(regs); + msg[1].buf = regs; + + status = i2c_transfer(the_menelaus->client->adapter, msg, 2); + if (status != 2) { + dev_err(dev, "%s error %d\n", "read", status); + return -EIO; + } + + menelaus_to_time(regs, t); + t->tm_wday = bcd2bin(regs[6]); + + return 0; +} + +static int menelaus_set_time(struct device *dev, struct rtc_time *t) +{ + int status; + + /* write date and time registers */ + status = time_to_menelaus(t, MENELAUS_RTC_SEC); + if (status < 0) + return status; + status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday)); + if (status < 0) { + dev_err(&the_menelaus->client->dev, "rtc write reg %02x " + "err %d\n", MENELAUS_RTC_WKDAY, status); + return status; + } + + /* now commit the write */ + status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY); + if (status < 0) + dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n", + status); + + return 0; +} + +static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w) +{ + struct i2c_msg msg[2]; + char regs[6]; + int status; + + /* block read alarm registers */ + regs[0] = MENELAUS_RTC_AL_SEC; + + msg[0].addr = MENELAUS_I2C_ADDRESS; + msg[0].flags = 0; + msg[0].len = 1; + msg[0].buf = regs; + + msg[1].addr = MENELAUS_I2C_ADDRESS; + msg[1].flags = I2C_M_RD; + msg[1].len = sizeof(regs); + msg[1].buf = regs; + + status = i2c_transfer(the_menelaus->client->adapter, msg, 2); + if (status != 2) { + dev_err(dev, "%s error %d\n", "alarm read", status); + return -EIO; + } + + menelaus_to_time(regs, &w->time); + + w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN); + + /* NOTE we *could* check if actually pending... */ + w->pending = 0; + + return 0; +} + +static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w) +{ + int status; + + if (the_menelaus->client->irq <= 0 && w->enabled) + return -ENODEV; + + /* clear previous alarm enable */ + if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) { + the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; + status = menelaus_write_reg(MENELAUS_RTC_CTRL, + the_menelaus->rtc_control); + if (status < 0) + return status; + } + + /* write alarm registers */ + status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC); + if (status < 0) + return status; + + /* enable alarm if requested */ + if (w->enabled) { + the_menelaus->rtc_control |= RTC_CTRL_AL_EN; + status = menelaus_write_reg(MENELAUS_RTC_CTRL, + the_menelaus->rtc_control); + } + + return status; +} + +#ifdef CONFIG_RTC_INTF_DEV + +static void menelaus_rtc_update_work(struct menelaus_chip *m) +{ + /* report 1/sec update */ + rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF); +} + +static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg) +{ + int status; + + if (the_menelaus->client->irq <= 0) + return -ENOIOCTLCMD; + + switch (cmd) { + /* alarm IRQ */ + case RTC_AIE_ON: + if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) + return 0; + the_menelaus->rtc_control |= RTC_CTRL_AL_EN; + break; + case RTC_AIE_OFF: + if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN)) + return 0; + the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; + break; + /* 1/second "update" IRQ */ + case RTC_UIE_ON: + if (the_menelaus->uie) + return 0; + status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); + status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ, + menelaus_rtc_update_work); + if (status == 0) + the_menelaus->uie = 1; + return status; + case RTC_UIE_OFF: + if (!the_menelaus->uie) + return 0; + status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); + if (status == 0) + the_menelaus->uie = 0; + return status; + default: + return -ENOIOCTLCMD; + } + return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); +} + +#else +#define menelaus_ioctl NULL +#endif + +/* REVISIT no compensation register support ... */ + +static const struct rtc_class_ops menelaus_rtc_ops = { + .ioctl = menelaus_ioctl, + .read_time = menelaus_read_time, + .set_time = menelaus_set_time, + .read_alarm = menelaus_read_alarm, + .set_alarm = menelaus_set_alarm, +}; + +static void menelaus_rtc_alarm_work(struct menelaus_chip *m) +{ + /* report alarm */ + rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF); + + /* then disable it; alarms are oneshot */ + the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; + menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); +} + +static inline void menelaus_rtc_init(struct menelaus_chip *m) +{ + int alarm = (m->client->irq > 0); + int err; + + /* assume 32KDETEN pin is pulled high */ + if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) { + dev_dbg(&m->client->dev, "no 32k oscillator\n"); + return; + } + + m->rtc = devm_rtc_allocate_device(&m->client->dev); + if (IS_ERR(m->rtc)) + return; + + m->rtc->ops = &menelaus_rtc_ops; + + /* support RTC alarm; it can issue wakeups */ + if (alarm) { + if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ, + menelaus_rtc_alarm_work) < 0) { + dev_err(&m->client->dev, "can't handle RTC alarm\n"); + return; + } + device_init_wakeup(&m->client->dev, 1); + } + + /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */ + m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL); + if (!(m->rtc_control & RTC_CTRL_RTC_EN) + || (m->rtc_control & RTC_CTRL_AL_EN) + || (m->rtc_control & RTC_CTRL_EVERY_MASK)) { + if (!(m->rtc_control & RTC_CTRL_RTC_EN)) { + dev_warn(&m->client->dev, "rtc clock needs setting\n"); + m->rtc_control |= RTC_CTRL_RTC_EN; + } + m->rtc_control &= ~RTC_CTRL_EVERY_MASK; + m->rtc_control &= ~RTC_CTRL_AL_EN; + menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control); + } + + err = rtc_register_device(m->rtc); + if (err) { + if (alarm) { + menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ); + device_init_wakeup(&m->client->dev, 0); + } + dev_err(&m->client->dev, "can't register RTC: %d\n", + (int) PTR_ERR(m->rtc)); + the_menelaus->rtc = NULL; + } +} + +#else + +static inline void menelaus_rtc_init(struct menelaus_chip *m) +{ + /* nothing */ +} + +#endif + +/*-----------------------------------------------------------------------*/ + +static struct i2c_driver menelaus_i2c_driver; + +static int menelaus_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct menelaus_chip *menelaus; + int rev = 0; + int err = 0; + struct menelaus_platform_data *menelaus_pdata = + dev_get_platdata(&client->dev); + + if (the_menelaus) { + dev_dbg(&client->dev, "only one %s for now\n", + DRIVER_NAME); + return -ENODEV; + } + + menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL); + if (!menelaus) + return -ENOMEM; + + i2c_set_clientdata(client, menelaus); + + the_menelaus = menelaus; + menelaus->client = client; + + /* If a true probe check the device */ + rev = menelaus_read_reg(MENELAUS_REV); + if (rev < 0) { + pr_err(DRIVER_NAME ": device not found"); + return -ENODEV; + } + + /* Ack and disable all Menelaus interrupts */ + menelaus_write_reg(MENELAUS_INT_ACK1, 0xff); + menelaus_write_reg(MENELAUS_INT_ACK2, 0xff); + menelaus_write_reg(MENELAUS_INT_MASK1, 0xff); + menelaus_write_reg(MENELAUS_INT_MASK2, 0xff); + menelaus->mask1 = 0xff; + menelaus->mask2 = 0xff; + + /* Set output buffer strengths */ + menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73); + + if (client->irq > 0) { + err = request_irq(client->irq, menelaus_irq, 0, + DRIVER_NAME, menelaus); + if (err) { + dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", + client->irq, err); + return err; + } + } + + mutex_init(&menelaus->lock); + INIT_WORK(&menelaus->work, menelaus_work); + + pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f); + + err = menelaus_read_reg(MENELAUS_VCORE_CTRL1); + if (err < 0) + goto fail; + if (err & VCORE_CTRL1_HW_NSW) + menelaus->vcore_hw_mode = 1; + else + menelaus->vcore_hw_mode = 0; + + if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) { + err = menelaus_pdata->late_init(&client->dev); + if (err < 0) + goto fail; + } + + menelaus_rtc_init(menelaus); + + return 0; +fail: + free_irq(client->irq, menelaus); + flush_work(&menelaus->work); + return err; +} + +static int menelaus_remove(struct i2c_client *client) +{ + struct menelaus_chip *menelaus = i2c_get_clientdata(client); + + free_irq(client->irq, menelaus); + flush_work(&menelaus->work); + the_menelaus = NULL; + return 0; +} + +static const struct i2c_device_id menelaus_id[] = { + { "menelaus", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, menelaus_id); + +static struct i2c_driver menelaus_i2c_driver = { + .driver = { + .name = DRIVER_NAME, + }, + .probe = menelaus_probe, + .remove = menelaus_remove, + .id_table = menelaus_id, +}; + +module_i2c_driver(menelaus_i2c_driver); + +MODULE_AUTHOR("Texas Instruments, Inc. (and others)"); +MODULE_DESCRIPTION("I2C interface for Menelaus."); +MODULE_LICENSE("GPL"); |