From 388be4883952872b48c8e4789ff77d5b3b9cadb7 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sat, 26 Jun 2010 12:54:21 +0100 Subject: staging:iio: tsl2563 abi fixes and interrupt handling Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/light/tsl2563.c | 389 +++++++++++++++++++++++++++--------- 1 file changed, 299 insertions(+), 90 deletions(-) (limited to 'drivers/staging/iio/light/tsl2563.c') diff --git a/drivers/staging/iio/light/tsl2563.c b/drivers/staging/iio/light/tsl2563.c index e4b0a5ef1c1..98f8b78f5d8 100644 --- a/drivers/staging/iio/light/tsl2563.c +++ b/drivers/staging/iio/light/tsl2563.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -117,15 +118,17 @@ struct tsl2563_chip { struct iio_dev *indio_dev; struct delayed_work poweroff_work; + struct work_struct work_thresh; + s64 event_timestamp; /* Remember state for suspend and resume functions */ pm_message_t state; struct tsl2563_gainlevel_coeff *gainlevel; - /* Thresholds are in lux */ u16 low_thres; u16 high_thres; u8 intr; + bool int_enabled; /* Calibration coefficients */ u32 calib0; @@ -189,17 +192,29 @@ static int tsl2563_get_power(struct tsl2563_chip *chip) static int tsl2563_configure(struct tsl2563_chip *chip) { - struct i2c_client *client = chip->client; int ret; - ret = tsl2563_write(client, TSL2563_REG_TIMING, + ret = tsl2563_write(chip->client, TSL2563_REG_TIMING, chip->gainlevel->gaintime); if (ret) - goto out; - - ret = tsl2563_write(client, TSL2563_REG_INT, chip->intr); - -out: + goto error_ret; + ret = tsl2563_write(chip->client, TSL2563_REG_HIGHLOW, + chip->high_thres & 0xFF); + if (ret) + goto error_ret; + ret = tsl2563_write(chip->client, TSL2563_REG_HIGHHIGH, + (chip->high_thres >> 8) & 0xFF); + if (ret) + goto error_ret; + ret = tsl2563_write(chip->client, TSL2563_REG_LOWLOW, + chip->low_thres & 0xFF); + if (ret) + goto error_ret; + ret = tsl2563_write(chip->client, TSL2563_REG_LOWHIGH, + (chip->low_thres >> 8) & 0xFF); +/* Interrupt register is automatically written anyway if it is relevant + so is not here */ +error_ret: return ret; } @@ -323,21 +338,23 @@ static int tsl2563_get_adc(struct tsl2563_chip *chip) if (chip->state.event != PM_EVENT_ON) goto out; - cancel_delayed_work(&chip->poweroff_work); - - if (!tsl2563_get_power(chip)) { - ret = tsl2563_set_power(chip, 1); - if (ret) - goto out; - ret = tsl2563_configure(chip); - if (ret) - goto out; - tsl2563_wait_adc(chip); + if (!chip->int_enabled) { + cancel_delayed_work(&chip->poweroff_work); + + if (!tsl2563_get_power(chip)) { + ret = tsl2563_set_power(chip, 1); + if (ret) + goto out; + ret = tsl2563_configure(chip); + if (ret) + goto out; + tsl2563_wait_adc(chip); + } } while (retry) { ret = tsl2563_read(client, - TSL2563_REG_DATA0LOW | TSL2563_CLEARINT, + TSL2563_REG_DATA0LOW, buf0, sizeof(buf0)); if (ret != sizeof(buf0)) goto out; @@ -356,7 +373,8 @@ static int tsl2563_get_adc(struct tsl2563_chip *chip) chip->data0 = normalize_adc(adc0, chip->gainlevel->gaintime); chip->data1 = normalize_adc(adc1, chip->gainlevel->gaintime); - schedule_delayed_work(&chip->poweroff_work, 5 * HZ); + if (!chip->int_enabled) + schedule_delayed_work(&chip->poweroff_work, 5 * HZ); ret = 0; out: @@ -449,11 +467,12 @@ static unsigned int adc_to_lux(u32 adc0, u32 adc1) /* Sysfs interface */ /*--------------------------------------------------------------*/ -static ssize_t tsl2563_adc0_show(struct device *dev, +static ssize_t tsl2563_adc_show(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct tsl2563_chip *chip = indio_dev->dev_data; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int ret; mutex_lock(&chip->lock); @@ -462,26 +481,14 @@ static ssize_t tsl2563_adc0_show(struct device *dev, if (ret) goto out; - ret = snprintf(buf, PAGE_SIZE, "%d\n", chip->data0); -out: - mutex_unlock(&chip->lock); - return ret; -} - -static ssize_t tsl2563_adc1_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct tsl2563_chip *chip = indio_dev->dev_data; - int ret; - - mutex_lock(&chip->lock); - - ret = tsl2563_get_adc(chip); - if (ret) - goto out; - - ret = snprintf(buf, PAGE_SIZE, "%d\n", chip->data1); + switch (this_attr->address) { + case 0: + ret = snprintf(buf, PAGE_SIZE, "%d\n", chip->data0); + break; + case 1: + ret = snprintf(buf, PAGE_SIZE, "%d\n", chip->data1); + break; + } out: mutex_unlock(&chip->lock); return ret; @@ -527,37 +534,36 @@ static ssize_t format_calib(char *buf, int len, u32 calib) return snprintf(buf, PAGE_SIZE, "%d\n", calib_to_sysfs(calib)); } -static ssize_t tsl2563_calib0_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct tsl2563_chip *chip = indio_dev->dev_data; - int ret; - - mutex_lock(&chip->lock); - ret = format_calib(buf, PAGE_SIZE, chip->calib0); - mutex_unlock(&chip->lock); - return ret; -} - -static ssize_t tsl2563_calib1_show(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t tsl2563_calib_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct tsl2563_chip *chip = indio_dev->dev_data; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int ret; mutex_lock(&chip->lock); - ret = format_calib(buf, PAGE_SIZE, chip->calib1); + switch (this_attr->address) { + case 0: + ret = format_calib(buf, PAGE_SIZE, chip->calib0); + break; + case 1: + ret = format_calib(buf, PAGE_SIZE, chip->calib1); + break; + default: + ret = -ENODEV; + } mutex_unlock(&chip->lock); return ret; } -static int do_calib_store(struct device *dev, const char *buf, size_t len, - int ch) +static ssize_t tsl2563_calib_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct tsl2563_chip *chip = indio_dev->dev_data; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int value; u32 calib; @@ -566,37 +572,27 @@ static int do_calib_store(struct device *dev, const char *buf, size_t len, calib = calib_from_sysfs(value); - if (ch) - chip->calib1 = calib; - else + switch (this_attr->address) { + case 0: chip->calib0 = calib; + break; + case 1: + chip->calib1 = calib; + break; + } return len; } -static ssize_t tsl2563_calib0_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - return do_calib_store(dev, buf, len, 0); -} - -static ssize_t tsl2563_calib1_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - return do_calib_store(dev, buf, len, 1); -} - -/* AmitXXXX: Convert to IIO_DEV_ATTR_LIGHT* as in tsl2561 - * once I understand what they mean */ -static DEVICE_ATTR(adc0, S_IRUGO, tsl2563_adc0_show, NULL); -static DEVICE_ATTR(adc1, S_IRUGO, tsl2563_adc1_show, NULL); +static IIO_DEVICE_ATTR(intensity_both_raw, S_IRUGO, + tsl2563_adc_show, NULL, 0); +static IIO_DEVICE_ATTR(intensity_ir_raw, S_IRUGO, + tsl2563_adc_show, NULL, 1); static DEVICE_ATTR(illuminance0_input, S_IRUGO, tsl2563_lux_show, NULL); -static DEVICE_ATTR(calib0, S_IRUGO | S_IWUSR, - tsl2563_calib0_show, tsl2563_calib0_store); -static DEVICE_ATTR(calib1, S_IRUGO | S_IWUSR, - tsl2563_calib1_show, tsl2563_calib1_store); +static IIO_DEVICE_ATTR(intensity_both_calibgain, S_IRUGO | S_IWUSR, + tsl2563_calib_show, tsl2563_calib_store, 0); +static IIO_DEVICE_ATTR(intensity_ir_calibgain, S_IRUGO | S_IWUSR, + tsl2563_calib_show, tsl2563_calib_store, 1); static ssize_t tsl2563_show_name(struct device *dev, struct device_attribute *attr, @@ -610,11 +606,11 @@ static ssize_t tsl2563_show_name(struct device *dev, static DEVICE_ATTR(name, S_IRUGO, tsl2563_show_name, NULL); static struct attribute *tsl2563_attributes[] = { - &dev_attr_adc0.attr, - &dev_attr_adc1.attr, + &iio_dev_attr_intensity_both_raw.dev_attr.attr, + &iio_dev_attr_intensity_ir_raw.dev_attr.attr, &dev_attr_illuminance0_input.attr, - &dev_attr_calib0.attr, - &dev_attr_calib1.attr, + &iio_dev_attr_intensity_both_calibgain.dev_attr.attr, + &iio_dev_attr_intensity_ir_calibgain.dev_attr.attr, &dev_attr_name.attr, NULL }; @@ -623,6 +619,192 @@ static const struct attribute_group tsl2563_group = { .attrs = tsl2563_attributes, }; +static ssize_t tsl2563_read_thresh(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2563_chip *chip = indio_dev->dev_data; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + u16 val = 0; + switch (this_attr->address) { + case TSL2563_REG_HIGHLOW: + val = chip->high_thres; + break; + case TSL2563_REG_LOWLOW: + val = chip->low_thres; + break; + } + return snprintf(buf, PAGE_SIZE, "%d\n", val); +} + +static ssize_t tsl2563_write_thresh(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2563_chip *chip = indio_dev->dev_data; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + unsigned long val; + int ret; + + ret = strict_strtoul(buf, 10, &val); + if (ret) + return ret; + mutex_lock(&chip->lock); + ret = tsl2563_write(chip->client, this_attr->address, val & 0xFF); + if (ret) + goto error_ret; + ret = tsl2563_write(chip->client, this_attr->address + 1, + (val >> 8) & 0xFF); + switch (this_attr->address) { + case TSL2563_REG_HIGHLOW: + chip->high_thres = val; + break; + case TSL2563_REG_LOWLOW: + chip->low_thres = val; + break; + } + +error_ret: + mutex_unlock(&chip->lock); + + return ret < 0 ? ret : len; +} + +static IIO_DEVICE_ATTR(intensity_both_thresh_high_value, + S_IRUGO | S_IWUSR, + tsl2563_read_thresh, + tsl2563_write_thresh, + TSL2563_REG_HIGHLOW); + +static IIO_DEVICE_ATTR(intensity_both_thresh_low_value, + S_IRUGO | S_IWUSR, + tsl2563_read_thresh, + tsl2563_write_thresh, + TSL2563_REG_LOWLOW); + +static int tsl2563_int_th(struct iio_dev *dev_info, + int index, + s64 timestamp, + int not_test) +{ + struct tsl2563_chip *chip = dev_info->dev_data; + + chip->event_timestamp = timestamp; + schedule_work(&chip->work_thresh); + + return 0; +} + +static void tsl2563_int_bh(struct work_struct *work_s) +{ + struct tsl2563_chip *chip + = container_of(work_s, + struct tsl2563_chip, work_thresh); + u8 cmd = TSL2563_CMD | TSL2563_CLEARINT; + + iio_push_event(chip->indio_dev, 0, + IIO_EVENT_CODE_LIGHT_BASE, + chip->event_timestamp); + + /* reenable_irq */ + enable_irq(chip->client->irq); + /* clear the interrupt and push the event */ + i2c_master_send(chip->client, &cmd, sizeof(cmd)); + +} + +static ssize_t tsl2563_write_interrupt_config(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2563_chip *chip = indio_dev->dev_data; + struct iio_event_attr *this_attr = to_iio_event_attr(attr); + int input, ret = 0; + + ret = sscanf(buf, "%d", &input); + if (ret != 1) + return -EINVAL; + mutex_lock(&chip->lock); + if (input && !(chip->intr & 0x30)) { + iio_add_event_to_list(this_attr->listel, + &indio_dev->interrupts[0]->ev_list); + chip->intr &= ~0x30; + chip->intr |= 0x10; + /* ensure the chip is actually on */ + cancel_delayed_work(&chip->poweroff_work); + if (!tsl2563_get_power(chip)) { + ret = tsl2563_set_power(chip, 1); + if (ret) + goto out; + ret = tsl2563_configure(chip); + if (ret) + goto out; + } + ret = tsl2563_write(chip->client, TSL2563_REG_INT, chip->intr); + chip->int_enabled = true; + } + + if (!input && (chip->intr & 0x30)) { + chip->intr |= ~0x30; + ret = tsl2563_write(chip->client, TSL2563_REG_INT, chip->intr); + iio_remove_event_from_list(this_attr->listel, + &indio_dev->interrupts[0]->ev_list); + chip->int_enabled = false; + /* now the interrupt is not enabled, we can go to sleep */ + schedule_delayed_work(&chip->poweroff_work, 5 * HZ); + } +out: + mutex_unlock(&chip->lock); + + return (ret < 0) ? ret : len; +} + +static ssize_t tsl2563_read_interrupt_config(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2563_chip *chip = indio_dev->dev_data; + int ret; + u8 rxbuf; + ssize_t len; + + mutex_lock(&chip->lock); + ret = tsl2563_read(chip->client, + TSL2563_REG_INT, + &rxbuf, + sizeof(rxbuf)); + mutex_unlock(&chip->lock); + if (ret < 0) + goto error_ret; + len = snprintf(buf, PAGE_SIZE, "%d\n", !!(rxbuf & 0x30)); +error_ret: + + return (ret < 0) ? ret : len; +} + +IIO_EVENT_ATTR(intensity_both_thresh_both_en, + tsl2563_read_interrupt_config, + tsl2563_write_interrupt_config, + 0, + tsl2563_int_th); + +static struct attribute *tsl2563_event_attributes[] = { + &iio_event_attr_intensity_both_thresh_both_en.dev_attr.attr, + &iio_dev_attr_intensity_both_thresh_high_value.dev_attr.attr, + &iio_dev_attr_intensity_both_thresh_low_value.dev_attr.attr, + NULL, +}; + +static struct attribute_group tsl2563_event_attribute_group = { + .attrs = tsl2563_event_attributes, +}; + /*--------------------------------------------------------------*/ /* Probe, Attach, Remove */ /*--------------------------------------------------------------*/ @@ -641,6 +823,7 @@ static int __devinit tsl2563_probe(struct i2c_client *client, if (!chip) return -ENOMEM; + INIT_WORK(&chip->work_thresh, tsl2563_int_bh); i2c_set_clientdata(client, chip); chip->client = client; @@ -679,18 +862,36 @@ static int __devinit tsl2563_probe(struct i2c_client *client, chip->indio_dev->dev_data = (void *)(chip); chip->indio_dev->driver_module = THIS_MODULE; chip->indio_dev->modes = INDIO_DIRECT_MODE; + if (client->irq) { + chip->indio_dev->num_interrupt_lines = 1; + chip->indio_dev->event_attrs + = &tsl2563_event_attribute_group; + } ret = iio_device_register(chip->indio_dev); if (ret) goto fail1; + if (client->irq) { + ret = iio_register_interrupt_line(client->irq, + chip->indio_dev, + 0, + IRQF_TRIGGER_RISING, + client->name); + if (ret) + goto fail2; + } err = tsl2563_configure(chip); if (err) - goto fail2; + goto fail3; INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work); + /* The interrupt cannot yet be enabled so this is fine without lock */ schedule_delayed_work(&chip->poweroff_work, 5 * HZ); return 0; +fail3: + if (client->irq) + iio_unregister_interrupt_line(chip->indio_dev, 0); fail2: iio_device_unregister(chip->indio_dev); fail1: @@ -701,7 +902,15 @@ fail1: static int tsl2563_remove(struct i2c_client *client) { struct tsl2563_chip *chip = i2c_get_clientdata(client); - + if (!chip->int_enabled) + cancel_delayed_work(&chip->poweroff_work); + /* Ensure that interrupts are disabled - then flush any bottom halves */ + chip->intr |= ~0x30; + tsl2563_write(chip->client, TSL2563_REG_INT, chip->intr); + flush_scheduled_work(); + tsl2563_set_power(chip, 0); + if (client->irq) + iio_unregister_interrupt_line(chip->indio_dev, 0); iio_device_unregister(chip->indio_dev); kfree(chip); -- cgit v1.2.3