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1254 lines
29 KiB
1254 lines
29 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2004 Texas Instruments, Inc. |
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* |
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* Some parts based tps65010.c: |
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* Copyright (C) 2004 Texas Instruments and |
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* Copyright (C) 2004-2005 David Brownell |
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* |
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* Some parts based on tlv320aic24.c: |
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* Copyright (C) by Kai Svahn <[email protected]> |
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* |
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* Changes for interrupt handling and clean-up by |
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* Tony Lindgren <[email protected]> and Imre Deak <[email protected]> |
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* Cleanup and generalized support for voltage setting by |
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* Juha Yrjola |
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* Added support for controlling VCORE and regulator sleep states, |
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* Amit Kucheria <[email protected]> |
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* Copyright (C) 2005, 2006 Nokia Corporation |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/sched.h> |
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#include <linux/mutex.h> |
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#include <linux/workqueue.h> |
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#include <linux/delay.h> |
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#include <linux/rtc.h> |
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#include <linux/bcd.h> |
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#include <linux/slab.h> |
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#include <linux/mfd/menelaus.h> |
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#include <linux/gpio.h> |
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|
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#include <asm/mach/irq.h> |
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|
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#define DRIVER_NAME "menelaus" |
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|
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#define MENELAUS_I2C_ADDRESS 0x72 |
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|
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#define MENELAUS_REV 0x01 |
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#define MENELAUS_VCORE_CTRL1 0x02 |
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#define MENELAUS_VCORE_CTRL2 0x03 |
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#define MENELAUS_VCORE_CTRL3 0x04 |
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#define MENELAUS_VCORE_CTRL4 0x05 |
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#define MENELAUS_VCORE_CTRL5 0x06 |
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#define MENELAUS_DCDC_CTRL1 0x07 |
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#define MENELAUS_DCDC_CTRL2 0x08 |
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#define MENELAUS_DCDC_CTRL3 0x09 |
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#define MENELAUS_LDO_CTRL1 0x0A |
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#define MENELAUS_LDO_CTRL2 0x0B |
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#define MENELAUS_LDO_CTRL3 0x0C |
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#define MENELAUS_LDO_CTRL4 0x0D |
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#define MENELAUS_LDO_CTRL5 0x0E |
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#define MENELAUS_LDO_CTRL6 0x0F |
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#define MENELAUS_LDO_CTRL7 0x10 |
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#define MENELAUS_LDO_CTRL8 0x11 |
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#define MENELAUS_SLEEP_CTRL1 0x12 |
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#define MENELAUS_SLEEP_CTRL2 0x13 |
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#define MENELAUS_DEVICE_OFF 0x14 |
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#define MENELAUS_OSC_CTRL 0x15 |
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#define MENELAUS_DETECT_CTRL 0x16 |
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#define MENELAUS_INT_MASK1 0x17 |
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#define MENELAUS_INT_MASK2 0x18 |
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#define MENELAUS_INT_STATUS1 0x19 |
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#define MENELAUS_INT_STATUS2 0x1A |
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#define MENELAUS_INT_ACK1 0x1B |
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#define MENELAUS_INT_ACK2 0x1C |
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#define MENELAUS_GPIO_CTRL 0x1D |
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#define MENELAUS_GPIO_IN 0x1E |
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#define MENELAUS_GPIO_OUT 0x1F |
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#define MENELAUS_BBSMS 0x20 |
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#define MENELAUS_RTC_CTRL 0x21 |
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#define MENELAUS_RTC_UPDATE 0x22 |
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#define MENELAUS_RTC_SEC 0x23 |
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#define MENELAUS_RTC_MIN 0x24 |
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#define MENELAUS_RTC_HR 0x25 |
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#define MENELAUS_RTC_DAY 0x26 |
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#define MENELAUS_RTC_MON 0x27 |
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#define MENELAUS_RTC_YR 0x28 |
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#define MENELAUS_RTC_WKDAY 0x29 |
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#define MENELAUS_RTC_AL_SEC 0x2A |
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#define MENELAUS_RTC_AL_MIN 0x2B |
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#define MENELAUS_RTC_AL_HR 0x2C |
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#define MENELAUS_RTC_AL_DAY 0x2D |
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#define MENELAUS_RTC_AL_MON 0x2E |
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#define MENELAUS_RTC_AL_YR 0x2F |
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#define MENELAUS_RTC_COMP_MSB 0x30 |
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#define MENELAUS_RTC_COMP_LSB 0x31 |
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#define MENELAUS_S1_PULL_EN 0x32 |
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#define MENELAUS_S1_PULL_DIR 0x33 |
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#define MENELAUS_S2_PULL_EN 0x34 |
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#define MENELAUS_S2_PULL_DIR 0x35 |
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#define MENELAUS_MCT_CTRL1 0x36 |
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#define MENELAUS_MCT_CTRL2 0x37 |
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#define MENELAUS_MCT_CTRL3 0x38 |
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#define MENELAUS_MCT_PIN_ST 0x39 |
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#define MENELAUS_DEBOUNCE1 0x3A |
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|
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#define IH_MENELAUS_IRQS 12 |
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#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */ |
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#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */ |
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#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */ |
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#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */ |
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#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */ |
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#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */ |
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#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */ |
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#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */ |
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#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */ |
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#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */ |
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#define MENELAUS_RTCERR_IRQ 10 /* RTC error */ |
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#define MENELAUS_PSHBTN_IRQ 11 /* Push button */ |
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#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */ |
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#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */ |
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#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */ |
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#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */ |
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|
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/* VCORE_CTRL1 register */ |
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#define VCORE_CTRL1_BYP_COMP (1 << 5) |
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#define VCORE_CTRL1_HW_NSW (1 << 7) |
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|
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/* GPIO_CTRL register */ |
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#define GPIO_CTRL_SLOTSELEN (1 << 5) |
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#define GPIO_CTRL_SLPCTLEN (1 << 6) |
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#define GPIO1_DIR_INPUT (1 << 0) |
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#define GPIO2_DIR_INPUT (1 << 1) |
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#define GPIO3_DIR_INPUT (1 << 2) |
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|
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/* MCT_CTRL1 register */ |
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#define MCT_CTRL1_S1_CMD_OD (1 << 2) |
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#define MCT_CTRL1_S2_CMD_OD (1 << 3) |
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|
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/* MCT_CTRL2 register */ |
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#define MCT_CTRL2_VS2_SEL_D0 (1 << 0) |
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#define MCT_CTRL2_VS2_SEL_D1 (1 << 1) |
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#define MCT_CTRL2_S1CD_BUFEN (1 << 4) |
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#define MCT_CTRL2_S2CD_BUFEN (1 << 5) |
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#define MCT_CTRL2_S1CD_DBEN (1 << 6) |
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#define MCT_CTRL2_S2CD_BEN (1 << 7) |
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|
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/* MCT_CTRL3 register */ |
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#define MCT_CTRL3_SLOT1_EN (1 << 0) |
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#define MCT_CTRL3_SLOT2_EN (1 << 1) |
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#define MCT_CTRL3_S1_AUTO_EN (1 << 2) |
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#define MCT_CTRL3_S2_AUTO_EN (1 << 3) |
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|
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/* MCT_PIN_ST register */ |
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#define MCT_PIN_ST_S1_CD_ST (1 << 0) |
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#define MCT_PIN_ST_S2_CD_ST (1 << 1) |
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|
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static void menelaus_work(struct work_struct *_menelaus); |
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|
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struct menelaus_chip { |
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struct mutex lock; |
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struct i2c_client *client; |
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struct work_struct work; |
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#ifdef CONFIG_RTC_DRV_TWL92330 |
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struct rtc_device *rtc; |
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u8 rtc_control; |
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unsigned uie:1; |
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#endif |
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unsigned vcore_hw_mode:1; |
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u8 mask1, mask2; |
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void (*handlers[16])(struct menelaus_chip *); |
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void (*mmc_callback)(void *data, u8 mask); |
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void *mmc_callback_data; |
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}; |
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static struct menelaus_chip *the_menelaus; |
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static int menelaus_write_reg(int reg, u8 value) |
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{ |
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int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value); |
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|
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if (val < 0) { |
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pr_err(DRIVER_NAME ": write error"); |
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return val; |
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} |
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return 0; |
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} |
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static int menelaus_read_reg(int reg) |
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{ |
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int val = i2c_smbus_read_byte_data(the_menelaus->client, reg); |
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|
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if (val < 0) |
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pr_err(DRIVER_NAME ": read error"); |
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return val; |
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} |
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static int menelaus_enable_irq(int irq) |
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{ |
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if (irq > 7) { |
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irq -= 8; |
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the_menelaus->mask2 &= ~(1 << irq); |
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return menelaus_write_reg(MENELAUS_INT_MASK2, |
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the_menelaus->mask2); |
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} else { |
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the_menelaus->mask1 &= ~(1 << irq); |
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return menelaus_write_reg(MENELAUS_INT_MASK1, |
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the_menelaus->mask1); |
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} |
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} |
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static int menelaus_disable_irq(int irq) |
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{ |
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if (irq > 7) { |
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irq -= 8; |
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the_menelaus->mask2 |= (1 << irq); |
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return menelaus_write_reg(MENELAUS_INT_MASK2, |
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the_menelaus->mask2); |
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} else { |
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the_menelaus->mask1 |= (1 << irq); |
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return menelaus_write_reg(MENELAUS_INT_MASK1, |
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the_menelaus->mask1); |
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} |
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} |
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static int menelaus_ack_irq(int irq) |
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{ |
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if (irq > 7) |
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return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8)); |
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else |
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return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq); |
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} |
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|
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/* Adds a handler for an interrupt. Does not run in interrupt context */ |
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static int menelaus_add_irq_work(int irq, |
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void (*handler)(struct menelaus_chip *)) |
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{ |
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int ret = 0; |
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|
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mutex_lock(&the_menelaus->lock); |
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the_menelaus->handlers[irq] = handler; |
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ret = menelaus_enable_irq(irq); |
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mutex_unlock(&the_menelaus->lock); |
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return ret; |
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} |
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/* Removes handler for an interrupt */ |
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static int menelaus_remove_irq_work(int irq) |
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{ |
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int ret = 0; |
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mutex_lock(&the_menelaus->lock); |
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ret = menelaus_disable_irq(irq); |
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the_menelaus->handlers[irq] = NULL; |
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mutex_unlock(&the_menelaus->lock); |
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return ret; |
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} |
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/* |
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* Gets scheduled when a card detect interrupt happens. Note that in some cases |
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* this line is wired to card cover switch rather than the card detect switch |
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* in each slot. In this case the cards are not seen by menelaus. |
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* FIXME: Add handling for D1 too |
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*/ |
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static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw) |
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{ |
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int reg; |
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unsigned char card_mask = 0; |
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reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST); |
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if (reg < 0) |
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return; |
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if (!(reg & 0x1)) |
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card_mask |= MCT_PIN_ST_S1_CD_ST; |
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if (!(reg & 0x2)) |
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card_mask |= MCT_PIN_ST_S2_CD_ST; |
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if (menelaus_hw->mmc_callback) |
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menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data, |
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card_mask); |
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} |
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/* |
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* Toggles the MMC slots between open-drain and push-pull mode. |
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*/ |
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int menelaus_set_mmc_opendrain(int slot, int enable) |
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{ |
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int ret, val; |
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if (slot != 1 && slot != 2) |
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return -EINVAL; |
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mutex_lock(&the_menelaus->lock); |
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ret = menelaus_read_reg(MENELAUS_MCT_CTRL1); |
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if (ret < 0) { |
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mutex_unlock(&the_menelaus->lock); |
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return ret; |
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} |
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val = ret; |
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if (slot == 1) { |
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if (enable) |
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val |= MCT_CTRL1_S1_CMD_OD; |
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else |
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val &= ~MCT_CTRL1_S1_CMD_OD; |
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} else { |
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if (enable) |
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val |= MCT_CTRL1_S2_CMD_OD; |
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else |
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val &= ~MCT_CTRL1_S2_CMD_OD; |
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} |
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val); |
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mutex_unlock(&the_menelaus->lock); |
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|
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return ret; |
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} |
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EXPORT_SYMBOL(menelaus_set_mmc_opendrain); |
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int menelaus_set_slot_sel(int enable) |
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{ |
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int ret; |
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|
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mutex_lock(&the_menelaus->lock); |
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ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); |
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if (ret < 0) |
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goto out; |
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ret |= GPIO2_DIR_INPUT; |
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if (enable) |
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ret |= GPIO_CTRL_SLOTSELEN; |
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else |
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ret &= ~GPIO_CTRL_SLOTSELEN; |
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ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); |
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out: |
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mutex_unlock(&the_menelaus->lock); |
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return ret; |
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} |
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EXPORT_SYMBOL(menelaus_set_slot_sel); |
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int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en) |
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{ |
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int ret, val; |
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|
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if (slot != 1 && slot != 2) |
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return -EINVAL; |
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if (power >= 3) |
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return -EINVAL; |
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|
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mutex_lock(&the_menelaus->lock); |
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ret = menelaus_read_reg(MENELAUS_MCT_CTRL2); |
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if (ret < 0) |
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goto out; |
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val = ret; |
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if (slot == 1) { |
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if (cd_en) |
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val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN; |
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else |
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val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN); |
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} else { |
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if (cd_en) |
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val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN; |
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else |
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val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN); |
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} |
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val); |
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if (ret < 0) |
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goto out; |
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|
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ret = menelaus_read_reg(MENELAUS_MCT_CTRL3); |
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if (ret < 0) |
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goto out; |
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val = ret; |
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if (slot == 1) { |
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if (enable) |
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val |= MCT_CTRL3_SLOT1_EN; |
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else |
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val &= ~MCT_CTRL3_SLOT1_EN; |
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} else { |
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int b; |
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|
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if (enable) |
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val |= MCT_CTRL3_SLOT2_EN; |
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else |
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val &= ~MCT_CTRL3_SLOT2_EN; |
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b = menelaus_read_reg(MENELAUS_MCT_CTRL2); |
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b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1); |
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b |= power; |
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b); |
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if (ret < 0) |
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goto out; |
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} |
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/* Disable autonomous shutdown */ |
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val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN); |
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ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val); |
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out: |
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mutex_unlock(&the_menelaus->lock); |
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return ret; |
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} |
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EXPORT_SYMBOL(menelaus_set_mmc_slot); |
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|
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int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask), |
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void *data) |
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{ |
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int ret = 0; |
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|
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the_menelaus->mmc_callback_data = data; |
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the_menelaus->mmc_callback = callback; |
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ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ, |
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menelaus_mmc_cd_work); |
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if (ret < 0) |
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return ret; |
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ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ, |
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menelaus_mmc_cd_work); |
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if (ret < 0) |
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return ret; |
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ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ, |
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menelaus_mmc_cd_work); |
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if (ret < 0) |
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return ret; |
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ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ, |
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menelaus_mmc_cd_work); |
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|
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return ret; |
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} |
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EXPORT_SYMBOL(menelaus_register_mmc_callback); |
|
|
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void menelaus_unregister_mmc_callback(void) |
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{ |
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menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ); |
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menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ); |
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menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ); |
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menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ); |
|
|
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the_menelaus->mmc_callback = NULL; |
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the_menelaus->mmc_callback_data = NULL; |
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} |
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EXPORT_SYMBOL(menelaus_unregister_mmc_callback); |
|
|
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struct menelaus_vtg { |
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const char *name; |
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u8 vtg_reg; |
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u8 vtg_shift; |
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u8 vtg_bits; |
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u8 mode_reg; |
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}; |
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|
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struct menelaus_vtg_value { |
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u16 vtg; |
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u16 val; |
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}; |
|
|
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static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV, |
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int vtg_val, int mode) |
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{ |
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int val, ret; |
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struct i2c_client *c = the_menelaus->client; |
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|
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mutex_lock(&the_menelaus->lock); |
|
|
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ret = menelaus_read_reg(vtg->vtg_reg); |
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if (ret < 0) |
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goto out; |
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val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift); |
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val |= vtg_val << vtg->vtg_shift; |
|
|
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dev_dbg(&c->dev, "Setting voltage '%s'" |
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"to %d mV (reg 0x%02x, val 0x%02x)\n", |
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vtg->name, mV, vtg->vtg_reg, val); |
|
|
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ret = menelaus_write_reg(vtg->vtg_reg, val); |
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if (ret < 0) |
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goto out; |
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ret = menelaus_write_reg(vtg->mode_reg, mode); |
|
out: |
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mutex_unlock(&the_menelaus->lock); |
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if (ret == 0) { |
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/* Wait for voltage to stabilize */ |
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msleep(1); |
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} |
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return ret; |
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} |
|
|
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static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl, |
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int n) |
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{ |
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int i; |
|
|
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for (i = 0; i < n; i++, tbl++) |
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if (tbl->vtg == vtg) |
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return tbl->val; |
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return -EINVAL; |
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} |
|
|
|
/* |
|
* Vcore can be programmed in two ways: |
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* SW-controlled: Required voltage is programmed into VCORE_CTRL1 |
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* HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3 |
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* and VCORE_CTRL4 |
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* |
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* Call correct 'set' function accordingly |
|
*/ |
|
|
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static const struct menelaus_vtg_value vcore_values[] = { |
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{ 1000, 0 }, |
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{ 1025, 1 }, |
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{ 1050, 2 }, |
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{ 1075, 3 }, |
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{ 1100, 4 }, |
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{ 1125, 5 }, |
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{ 1150, 6 }, |
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{ 1175, 7 }, |
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{ 1200, 8 }, |
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{ 1225, 9 }, |
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{ 1250, 10 }, |
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{ 1275, 11 }, |
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{ 1300, 12 }, |
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{ 1325, 13 }, |
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{ 1350, 14 }, |
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{ 1375, 15 }, |
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{ 1400, 16 }, |
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{ 1425, 17 }, |
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{ 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 = devm_rtc_register_device(m->rtc); |
|
if (err) { |
|
if (alarm) { |
|
menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ); |
|
device_init_wakeup(&m->client->dev, 0); |
|
} |
|
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");
|
|
|