From f311c822faee404df6983e14bbd876201111aa18 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 3 Oct 2005 13:48:37 +0300 Subject: [PATCH] ARM: OMAP: Add support for 24xx Menelaus I2C PM chip Add support for 24xx Menelaus I2C PM chip. Based on TI's 2.6.9 code. --- drivers/i2c/chips/Kconfig | 6 + drivers/i2c/chips/Makefile | 1 + drivers/i2c/chips/menelaus.c | 487 +++++++++++++++++++++++++++ include/asm-arm/arch-omap/irqs.h | 1 + include/asm-arm/arch-omap/menelaus.h | 22 ++ 5 files changed, 517 insertions(+) create mode 100644 drivers/i2c/chips/menelaus.c create mode 100644 include/asm-arm/arch-omap/menelaus.h diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig index dee39325760..7015e93c89b 100644 --- a/drivers/i2c/chips/Kconfig +++ b/drivers/i2c/chips/Kconfig @@ -116,6 +116,12 @@ config GPIOEXPANDER_OMAP If you say yes here you get support for I/O expander calls to configure IrDA, Camera and audio devices endmenu +config MENELAUS + bool "Menelaus PM chip" + depends on I2C=y && ARCH_OMAP24XX + help + Say yes here if you have Menelaus chip on your board + config SENSORS_M41T00 tristate "ST M41T00 RTC chip" depends on I2C && PPC32 diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile index c60a38e588b..d56f09b4ea3 100644 --- a/drivers/i2c/chips/Makefile +++ b/drivers/i2c/chips/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o obj-$(CONFIG_TPS65010) += tps65010.o obj-$(CONFIG_SENSORS_TLV320AIC23) += tlv320aic23.o obj-$(CONFIG_GPIOEXPANDER_OMAP) += gpio_expander_omap.o +obj-$(CONFIG_MENELAUS) += menelaus.o ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/i2c/chips/menelaus.c b/drivers/i2c/chips/menelaus.c new file mode 100644 index 00000000000..f77c9dfd29d --- /dev/null +++ b/drivers/i2c/chips/menelaus.c @@ -0,0 +1,487 @@ +/* + * drivers/i2c/chips/menelaus.c + * + * 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 + * + * Changes for interrupt handling and clean-up by + * Tony Lindgren and Imre Deak + * Copyright (C) 2005 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 +#include +#include +#include + +#include +#include + +#include +#include +#include + +#define DRIVER_NAME "menelaus" + +#define pr_err(fmt, arg...) printk(KERN_ERR DRIVER_NAME ": ", ## arg); + +#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 */ + +static void menelaus_work(void * _menelaus); + +/* Initialized by menelaus_init */ +static unsigned short normal_i2c[] = { MENELAUS_I2C_ADDRESS, I2C_CLIENT_END }; + +I2C_CLIENT_INSMOD; + +struct menelaus_chip { + unsigned long initialized; + struct semaphore lock; + struct i2c_client client; + struct work_struct work; + int irq; + void *handlers[16]; + void (*mmc_callback)(unsigned long data, u8 mask); + unsigned long mmc_callback_data; +}; + +static struct menelaus_chip menelaus; + +static void menelaus_write(u8 value, u8 reg) +{ + if (i2c_smbus_write_byte_data(&menelaus.client, reg, value) < 0) + pr_err("write error"); +} + +static u8 menelaus_read(u8 reg) +{ + int val = i2c_smbus_read_byte_data(&menelaus.client, reg); + + if (val < 0) { + pr_err("read error"); + return 0; + } + + return val; +} + +static void menelaus_enable_irq(int irq) +{ + if (irq > 7) + menelaus_write(menelaus_read(MENELAUS_INT_MASK2) & + ~(1 << (irq - 8)), MENELAUS_INT_MASK2); + else + menelaus_write(menelaus_read(MENELAUS_INT_MASK1) & + ~(1 << irq), MENELAUS_INT_MASK1); +} + +static void menelaus_disable_irq(int irq) +{ + if (irq > 7) + menelaus_write(menelaus_read(MENELAUS_INT_MASK2) + | (1 << (irq - 8)), MENELAUS_INT_MASK2); + else + menelaus_write(menelaus_read(MENELAUS_INT_MASK1) + | (1 << irq), MENELAUS_INT_MASK1); +} + +static void menelaus_ack_irq(int irq) +{ + if (irq > 7) + menelaus_write(1 << (irq - 8), MENELAUS_INT_ACK2); + else + menelaus_write(1 << irq, MENELAUS_INT_ACK1); +} + +/* Adds a handler for an interrupt. Does not run in interrupt context */ +static int menelaus_add_irq_work(int irq, void * handler) +{ + down(&menelaus.lock); + menelaus.handlers[irq] = handler; + menelaus_enable_irq(irq); + up(&menelaus.lock); + + return 0; +} + +/* Removes handler for an interrupt */ +static void menelaus_remove_irq_work(int irq) +{ + down(&menelaus.lock); + menelaus_disable_irq(irq); + menelaus.handlers[irq] = NULL; + up(&menelaus.lock); +} + +/*-----------------------------------------------------------------------*/ + +/* + * Toggles the MMC slots between open-drain and push-pull mode. + * We always set both slots the same way. + */ +void menelaus_mmc_opendrain(int enable) +{ + unsigned char reg = menelaus_read(MENELAUS_MCT_CTRL1); + + if (enable) + reg |= (0x3 << 2); + else + reg &= ~(0x3 << 2); + + menelaus_write(reg, MENELAUS_MCT_CTRL1); +} +EXPORT_SYMBOL(menelaus_mmc_opendrain); + +/* + * 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 int menelaus_mmc_cd_work(struct menelaus_chip *menelaus) +{ + unsigned char reg; + unsigned char card_mask = 0; + + reg = menelaus_read(MENELAUS_MCT_PIN_ST); + + if (!(reg & 0x1)) + card_mask |= (1 << 0); + + if (!(reg & 0x2)) + card_mask |= (1 << 1); + + if (menelaus->mmc_callback) + menelaus->mmc_callback(menelaus->mmc_callback_data, card_mask); + + return 0; +} + +/* Initializes MMC slots */ +void menelaus_mmc_register(void (*callback)(u8 card_mask), unsigned long data) +{ + int reg; + + /* DCDC3 to 3V */ + reg = menelaus_read(MENELAUS_DCDC_CTRL1); + reg |= 0x6 << 4; + menelaus_write(reg, MENELAUS_DCDC_CTRL1); + + reg = menelaus_read(MENELAUS_DCDC_CTRL3); + reg |= 0x6; + menelaus_write(reg, MENELAUS_DCDC_CTRL3); + + /* Enable both slots, do not set auto shutdown */ + reg = menelaus_read(MENELAUS_MCT_CTRL3); + reg |= 0x3; + menelaus_write(reg, MENELAUS_MCT_CTRL3); + + /* Enable card detect for both slots, slot 2 powered from DCDC3 */ + reg = menelaus_read(MENELAUS_MCT_CTRL2); + reg |= 0xf0; + menelaus_write(reg, MENELAUS_MCT_CTRL2); + + /* Set both slots in open-drain mode, card detect normally closed */ + reg = menelaus_read(MENELAUS_MCT_CTRL1); + reg |= 0xfc; + menelaus_write(reg, MENELAUS_MCT_CTRL1); + + /* Set MMC voltage */ + reg = menelaus_read(MENELAUS_LDO_CTRL7); + reg |= 0x03; + menelaus_write(reg, MENELAUS_LDO_CTRL7); + + menelaus.mmc_callback_data = data; + menelaus.mmc_callback = callback; + + menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ, menelaus_mmc_cd_work); + menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ, menelaus_mmc_cd_work); + menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ, menelaus_mmc_cd_work); + menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ, menelaus_mmc_cd_work); +} +EXPORT_SYMBOL(menelaus_mmc_register); + +void menelaus_mmc_remove(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); + + menelaus.mmc_callback = NULL; + menelaus.mmc_callback_data = 0; + + /* FIXME: Shutdown MMC components of Menelaus */ +} +EXPORT_SYMBOL(menelaus_mmc_remove); + +/*-----------------------------------------------------------------------*/ + +/* Handles Menelaus interrupts. Does not run in interrupt context */ +static void menelaus_work(void * _menelaus) +{ + struct menelaus_chip *menelaus = _menelaus; + int (*handler)(struct menelaus_chip *menelaus); + + while (1) { + int i; + unsigned char isr; + + isr = menelaus_read(MENELAUS_INT_STATUS1) | + (menelaus_read(MENELAUS_INT_STATUS2) << 8); + + if (!isr) + break; + + for (i = 0; i < IH_MENELAUS_IRQS; i++) { + if (isr & (1 << i)) { + down(&menelaus->lock); + menelaus_disable_irq(i); + menelaus_ack_irq(i); + if (menelaus->handlers[i]) { + handler = menelaus->handlers[i]; + handler(menelaus); + } + menelaus_enable_irq(i); + up(&menelaus->lock); + } + } + } + enable_irq(menelaus->irq); +} + +/* + * We cannot use I2C in interrupt context, so we just schedule work. + */ +static irqreturn_t menelaus_irq(int irq, void *_menelaus, struct pt_regs *regs) +{ + struct menelaus_chip *menelaus = _menelaus; + + disable_irq_nosync(irq); + (void)schedule_work(&menelaus->work); + + return IRQ_HANDLED; +} + +static struct i2c_driver menelaus_i2c_driver; + +static int menelaus_probe(struct i2c_adapter *adapter, int address, int kind) +{ + struct i2c_client *c; + int rev = 0; + int err = 0, i; + + if (test_and_set_bit(0, &menelaus.initialized)) + return -EBUSY; + + c = &menelaus.client; + strncpy(c->name, DRIVER_NAME, sizeof(c->name)); + c->addr = address; + c->adapter = adapter; + c->driver = &menelaus_i2c_driver; + c->flags = 0; + + if ((err = i2c_attach_client(c)) < 0) { + pr_err("couldn't attach\n"); + goto fail1; + } + + /* If a true probe check the device */ + if (kind < 0 && (rev = menelaus_read(MENELAUS_REV)) < 0) { + pr_err("device not found"); + err = -ENODEV; + goto fail2; + } + + /* Most likely Menelaus interrupt is at SYS_NIRQ */ + omap_cfg_reg(W19_24XX_SYS_NIRQ); + menelaus.irq = INT_24XX_SYS_NIRQ; + + /* Disable all menelaus interrupts */ + for (i = 0; i < 16; i++) { + menelaus_ack_irq(i); + menelaus_disable_irq(i); + } + + err = request_irq(menelaus.irq, menelaus_irq, SA_INTERRUPT, + DRIVER_NAME, &menelaus); + if (err) + printk(KERN_ERR "Could not get Menelaus IRQ\n"); + + init_MUTEX(&menelaus.lock); + INIT_WORK(&menelaus.work, menelaus_work, &menelaus); + + if (kind < 0) + pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f); + + return 0; + +fail2: + i2c_detach_client(c); +fail1: + clear_bit(0, &menelaus.initialized); + return err; +} + +static int menelaus_remove(struct i2c_client *client) +{ + int err; + + free_irq(menelaus.irq, &menelaus); + + if ((err = i2c_detach_client(client))) { + pr_err("client deregistration failed\n"); + return err; + } + + clear_bit(0, &menelaus.initialized); + + return 0; +} + +/*-----------------------------------------------------------------------*/ + +static int menelaus_scan_bus(struct i2c_adapter *bus) +{ + if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_WRITE_BYTE)) { + pr_err("invalid i2c bus functionality\n"); + return -EINVAL; + } + + return i2c_probe(bus, &addr_data, menelaus_probe); +} + +static struct i2c_driver menelaus_i2c_driver = { + .owner = THIS_MODULE, + .name = DRIVER_NAME, + .id = I2C_DRIVERID_EXP0, /*FIXME:accroding to i2c-ids.h */ + .class = I2C_CLASS_HWMON, + .flags = I2C_DF_NOTIFY, + .attach_adapter = menelaus_scan_bus, + .detach_client = menelaus_remove, +}; + +static int __init menelaus_init(void) +{ + int res; + + if ((res = i2c_add_driver(&menelaus_i2c_driver)) < 0) { + pr_err("driver registration failed\n"); + return res; + } + + return 0; +} + +static void __exit menelaus_exit(void) +{ + if (i2c_del_driver(&menelaus_i2c_driver) < 0) + pr_err("driver remove failed\n"); + + /* FIXME: Shutdown menelaus parts that can be shut down */ +} + +MODULE_AUTHOR("Texas Instruments, Inc."); +MODULE_DESCRIPTION("I2C interface for Menelaus."); +MODULE_LICENSE("GPL"); + +module_init(menelaus_init); +module_exit(menelaus_exit); diff --git a/include/asm-arm/arch-omap/irqs.h b/include/asm-arm/arch-omap/irqs.h index dc991fee5d7..45f03dcd53b 100644 --- a/include/asm-arm/arch-omap/irqs.h +++ b/include/asm-arm/arch-omap/irqs.h @@ -231,6 +231,7 @@ #define INT_730_DMA_CH15 (62 + IH2_BASE) #define INT_730_NAND (63 + IH2_BASE) +#define INT_24XX_SYS_NIRQ 7 #define INT_24XX_GPIO_BANK1 29 #define INT_24XX_GPIO_BANK2 30 #define INT_24XX_GPIO_BANK3 31 diff --git a/include/asm-arm/arch-omap/menelaus.h b/include/asm-arm/arch-omap/menelaus.h new file mode 100644 index 00000000000..46be8b8d634 --- /dev/null +++ b/include/asm-arm/arch-omap/menelaus.h @@ -0,0 +1,22 @@ +/* + * linux/include/asm-arm/arch-omap/menelaus.h + * + * Functions to access Menelaus power management chip + */ + +#ifndef __ASM_ARCH_MENELAUS_H +#define __ASM_ARCH_MENELAUS_H + +extern void menelaus_mmc_register(void (*callback)(u8 card_mask), + unsigned long data); +extern void menelaus_mmc_remove(void); +extern void menelaus_mmc_opendrain(int enable); + +#if defined(CONFIG_ARCH_OMAP24XX) && defined(CONFIG_MENELAUS) +#define omap_has_menelaus() 1 +#else +#define omap_has_menelaus() 0 +#endif + +#endif + -- 2.41.1