diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/88pm860x-core.c | 226 |
1 files changed, 219 insertions, 7 deletions
diff --git a/drivers/mfd/88pm860x-core.c b/drivers/mfd/88pm860x-core.c index 72b00304dc3a..9185f0d945f4 100644 --- a/drivers/mfd/88pm860x-core.c +++ b/drivers/mfd/88pm860x-core.c @@ -11,6 +11,7 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/mfd/core.h> @@ -67,15 +68,209 @@ static struct mfd_cell pm8607_devs[] = { PM8607_REG_DEVS(ldo14, LDO14), }; -static void device_8606_init(struct pm860x_chip *chip, struct i2c_client *i2c, - struct pm860x_platform_data *pdata) +#define CHECK_IRQ(irq) \ +do { \ + if ((irq < 0) || (irq >= PM860X_NUM_IRQ)) \ + return -EINVAL; \ +} while (0) + +/* IRQs only occur on 88PM8607 */ +int pm860x_mask_irq(struct pm860x_chip *chip, int irq) +{ + struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \ + : chip->companion; + int offset, data, ret; + + CHECK_IRQ(irq); + + offset = (irq >> 3) + PM8607_INT_MASK_1; + data = 1 << (irq % 8); + ret = pm860x_set_bits(i2c, offset, data, 0); + + return ret; +} +EXPORT_SYMBOL(pm860x_mask_irq); + +int pm860x_unmask_irq(struct pm860x_chip *chip, int irq) +{ + struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \ + : chip->companion; + int offset, data, ret; + + CHECK_IRQ(irq); + + offset = (irq >> 3) + PM8607_INT_MASK_1; + data = 1 << (irq % 8); + ret = pm860x_set_bits(i2c, offset, data, data); + + return ret; +} +EXPORT_SYMBOL(pm860x_unmask_irq); + +#define INT_STATUS_NUM (3) + +static irqreturn_t pm8607_irq_thread(int irq, void *data) +{ + DECLARE_BITMAP(irq_status, PM860X_NUM_IRQ); + struct pm860x_chip *chip = data; + struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \ + : chip->companion; + unsigned char status_buf[INT_STATUS_NUM << 1]; + unsigned long value; + int i, ret; + + irq_status[0] = 0; + + /* read out status register */ + ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1, + INT_STATUS_NUM << 1, status_buf); + if (ret < 0) + goto out; + if (chip->irq_mode) { + /* 0, clear by read. 1, clear by write */ + ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1, + INT_STATUS_NUM, status_buf); + if (ret < 0) + goto out; + } + + /* clear masked interrupt status */ + for (i = 0, value = 0; i < INT_STATUS_NUM; i++) { + status_buf[i] &= status_buf[i + INT_STATUS_NUM]; + irq_status[0] |= status_buf[i] << (i * 8); + } + + while (!bitmap_empty(irq_status, PM860X_NUM_IRQ)) { + irq = find_first_bit(irq_status, PM860X_NUM_IRQ); + clear_bit(irq, irq_status); + dev_dbg(chip->dev, "Servicing IRQ #%d\n", irq); + + mutex_lock(&chip->irq_lock); + if (chip->irq[irq].handler) + chip->irq[irq].handler(irq, chip->irq[irq].data); + else { + pm860x_mask_irq(chip, irq); + dev_err(chip->dev, "Nobody cares IRQ %d. " + "Now mask it.\n", irq); + for (i = 0; i < (INT_STATUS_NUM << 1); i++) { + dev_err(chip->dev, "status[%d]:%x\n", i, + status_buf[i]); + } + } + mutex_unlock(&chip->irq_lock); + } +out: + return IRQ_HANDLED; +} + +int pm860x_request_irq(struct pm860x_chip *chip, int irq, + irq_handler_t handler, void *data) { + CHECK_IRQ(irq); + if (!handler) + return -EINVAL; + + mutex_lock(&chip->irq_lock); + chip->irq[irq].handler = handler; + chip->irq[irq].data = data; + mutex_unlock(&chip->irq_lock); + + return 0; } +EXPORT_SYMBOL(pm860x_request_irq); -static void device_8607_init(struct pm860x_chip *chip, struct i2c_client *i2c, - struct pm860x_platform_data *pdata) +int pm860x_free_irq(struct pm860x_chip *chip, int irq) { - int i, count; + CHECK_IRQ(irq); + + mutex_lock(&chip->irq_lock); + chip->irq[irq].handler = NULL; + chip->irq[irq].data = NULL; + mutex_unlock(&chip->irq_lock); + + return 0; +} +EXPORT_SYMBOL(pm860x_free_irq); + +static int __devinit device_irq_init(struct pm860x_chip *chip, + struct pm860x_platform_data *pdata) +{ + struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \ + : chip->companion; + unsigned char status_buf[INT_STATUS_NUM]; + int data, mask, ret = -EINVAL; + + mutex_init(&chip->irq_lock); + + mask = PM8607_B0_MISC1_INV_INT | PM8607_B0_MISC1_INT_CLEAR + | PM8607_B0_MISC1_INT_MASK; + data = 0; + chip->irq_mode = 0; + if (pdata && pdata->irq_mode) { + /* + * irq_mode defines the way of clearing interrupt. If it's 1, + * clear IRQ by write. Otherwise, clear it by read. + * This control bit is valid from 88PM8607 B0 steping. + */ + data |= PM8607_B0_MISC1_INT_CLEAR; + chip->irq_mode = 1; + } + ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, mask, data); + if (ret < 0) + goto out; + + /* mask all IRQs */ + memset(status_buf, 0, INT_STATUS_NUM); + ret = pm860x_bulk_write(i2c, PM8607_INT_MASK_1, + INT_STATUS_NUM, status_buf); + if (ret < 0) + goto out; + + if (chip->irq_mode) { + /* clear interrupt status by write */ + memset(status_buf, 0xFF, INT_STATUS_NUM); + ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1, + INT_STATUS_NUM, status_buf); + } else { + /* clear interrupt status by read */ + ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1, + INT_STATUS_NUM, status_buf); + } + if (ret < 0) + goto out; + + memset(chip->irq, 0, sizeof(struct pm860x_irq) * PM860X_NUM_IRQ); + + ret = request_threaded_irq(i2c->irq, NULL, pm8607_irq_thread, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + "88PM8607", chip); + if (ret < 0) { + dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq); + goto out; + } + chip->chip_irq = i2c->irq; + return 0; +out: + return ret; +} + +static void __devexit device_irq_exit(struct pm860x_chip *chip) +{ + if (chip->chip_irq >= 0) + free_irq(chip->chip_irq, chip); +} + +static void __devinit device_8606_init(struct pm860x_chip *chip, + struct i2c_client *i2c, + struct pm860x_platform_data *pdata) +{ +} + +static void __devinit device_8607_init(struct pm860x_chip *chip, + struct i2c_client *i2c, + struct pm860x_platform_data *pdata) +{ + int i, count, data; int ret; ret = pm860x_reg_read(i2c, PM8607_CHIP_ID); @@ -91,7 +286,6 @@ static void device_8607_init(struct pm860x_chip *chip, struct i2c_client *i2c, "Chip ID: %02x\n", ret); goto out; } - chip->chip_version = ret; ret = pm860x_reg_read(i2c, PM8607_BUCK3); if (ret < 0) { @@ -101,12 +295,26 @@ static void device_8607_init(struct pm860x_chip *chip, struct i2c_client *i2c, if (ret & PM8607_BUCK3_DOUBLE) chip->buck3_double = 1; - ret = pm860x_reg_read(i2c, PM8607_MISC1); + ret = pm860x_reg_read(i2c, PM8607_B0_MISC1); if (ret < 0) { dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret); goto out; } + if (pdata && (pdata->i2c_port == PI2C_PORT)) + data = PM8607_B0_MISC1_PI2C; + else + data = 0; + ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, PM8607_B0_MISC1_PI2C, data); + if (ret < 0) { + dev_err(chip->dev, "Failed to access MISC1:%d\n", ret); + goto out; + } + + ret = device_irq_init(chip, pdata); + if (ret < 0) + goto out; + count = ARRAY_SIZE(pm8607_devs); for (i = 0; i < count; i++) { ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i], @@ -123,6 +331,8 @@ out: int pm860x_device_init(struct pm860x_chip *chip, struct pm860x_platform_data *pdata) { + chip->chip_irq = -EINVAL; + switch (chip->id) { case CHIP_PM8606: device_8606_init(chip, chip->client, pdata); @@ -142,11 +352,13 @@ int pm860x_device_init(struct pm860x_chip *chip, break; } } + return 0; } void pm860x_device_exit(struct pm860x_chip *chip) { + device_irq_exit(chip); mfd_remove_devices(chip->dev); } |