| /* |
| * drivers/media/video/as3645a.c - AS3645A and LM3555 flash controllers driver |
| * |
| * Copyright (C) 2008-2011 Nokia Corporation |
| * Copyright (c) 2011, Intel Corporation. |
| * |
| * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * version 2 as published by the Free Software Foundation. |
| * |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA |
| * 02110-1301 USA |
| * |
| * TODO: |
| * - Check hardware FSTROBE control when sensor driver add support for this |
| * |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/i2c.h> |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| |
| #include <media/as3645a.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-device.h> |
| |
| #define AS_TIMER_MS_TO_CODE(t) (((t) - 100) / 50) |
| #define AS_TIMER_CODE_TO_MS(c) (50 * (c) + 100) |
| |
| /* Register definitions */ |
| |
| /* Read-only Design info register: Reset state: xxxx 0001 */ |
| #define AS_DESIGN_INFO_REG 0x00 |
| #define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4)) |
| #define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f) |
| |
| /* Read-only Version control register: Reset state: 0000 0000 |
| * for first engineering samples |
| */ |
| #define AS_VERSION_CONTROL_REG 0x01 |
| #define AS_VERSION_CONTROL_RFU(x) (((x) >> 4)) |
| #define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f) |
| |
| /* Read / Write (Indicator and timer register): Reset state: 0000 1111 */ |
| #define AS_INDICATOR_AND_TIMER_REG 0x02 |
| #define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0 |
| #define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4 |
| #define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6 |
| |
| /* Read / Write (Current set register): Reset state: 0110 1001 */ |
| #define AS_CURRENT_SET_REG 0x03 |
| #define AS_CURRENT_ASSIST_LIGHT_SHIFT 0 |
| #define AS_CURRENT_LED_DET_ON (1 << 3) |
| #define AS_CURRENT_FLASH_CURRENT_SHIFT 4 |
| |
| /* Read / Write (Control register): Reset state: 1011 0100 */ |
| #define AS_CONTROL_REG 0x04 |
| #define AS_CONTROL_MODE_SETTING_SHIFT 0 |
| #define AS_CONTROL_STROBE_ON (1 << 2) |
| #define AS_CONTROL_OUT_ON (1 << 3) |
| #define AS_CONTROL_EXT_TORCH_ON (1 << 4) |
| #define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5) |
| #define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5) |
| #define AS_CONTROL_COIL_PEAK_SHIFT 6 |
| |
| /* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */ |
| #define AS_FAULT_INFO_REG 0x05 |
| #define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1) |
| #define AS_FAULT_INFO_INDICATOR_LED (1 << 2) |
| #define AS_FAULT_INFO_LED_AMOUNT (1 << 3) |
| #define AS_FAULT_INFO_TIMEOUT (1 << 4) |
| #define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5) |
| #define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6) |
| #define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7) |
| |
| /* Boost register */ |
| #define AS_BOOST_REG 0x0d |
| #define AS_BOOST_CURRENT_DISABLE (0 << 0) |
| #define AS_BOOST_CURRENT_ENABLE (1 << 0) |
| |
| /* Password register is used to unlock boost register writing */ |
| #define AS_PASSWORD_REG 0x0f |
| #define AS_PASSWORD_UNLOCK_VALUE 0x55 |
| |
| enum as_mode { |
| AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT, |
| AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT, |
| AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT, |
| AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT, |
| }; |
| |
| /* |
| * struct as3645a |
| * |
| * @subdev: V4L2 subdev |
| * @pdata: Flash platform data |
| * @power_lock: Protects power_count |
| * @power_count: Power reference count |
| * @led_mode: V4L2 flash LED mode |
| * @timeout: Flash timeout in microseconds |
| * @flash_current: Flash current (0=200mA ... 15=500mA). Maximum |
| * values are 400mA for two LEDs and 500mA for one LED. |
| * @assist_current: Torch/Assist light current (0=20mA, 1=40mA ... 7=160mA) |
| * @indicator_current: Indicator LED current (0=0mA, 1=2.5mA ... 4=10mA) |
| * @strobe_source: Flash strobe source (software or external) |
| */ |
| struct as3645a { |
| struct v4l2_subdev subdev; |
| const struct as3645a_platform_data *pdata; |
| |
| struct mutex power_lock; |
| int power_count; |
| |
| /* Controls */ |
| struct v4l2_ctrl_handler ctrls; |
| |
| enum v4l2_flash_led_mode led_mode; |
| unsigned int timeout; |
| u8 flash_current; |
| u8 assist_current; |
| u8 indicator_current; |
| enum v4l2_flash_strobe_source strobe_source; |
| }; |
| |
| #define to_as3645a(sd) container_of(sd, struct as3645a, subdev) |
| |
| /* Return negative errno else zero on success */ |
| static int as3645a_write(struct as3645a *flash, u8 addr, u8 val) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev); |
| int rval; |
| |
| rval = i2c_smbus_write_byte_data(client, addr, val); |
| |
| dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val, |
| rval < 0 ? "fail" : "ok"); |
| |
| return rval; |
| } |
| |
| /* Return negative errno else a data byte received from the device. */ |
| static int as3645a_read(struct as3645a *flash, u8 addr) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev); |
| int rval; |
| |
| rval = i2c_smbus_read_byte_data(client, addr); |
| |
| dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval, |
| rval < 0 ? "fail" : "ok"); |
| |
| return rval; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Hardware configuration and trigger |
| */ |
| |
| /* |
| * as3645a_set_config - Set flash configuration registers |
| * @flash: The flash |
| * |
| * Configure the hardware with flash, assist and indicator currents, as well as |
| * flash timeout. |
| * |
| * Return 0 on success, or a negative error code if an I2C communication error |
| * occurred. |
| */ |
| static int as3645a_set_config(struct as3645a *flash) |
| { |
| int ret; |
| u8 val; |
| |
| val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT) |
| | (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT) |
| | AS_CURRENT_LED_DET_ON; |
| |
| ret = as3645a_write(flash, AS_CURRENT_SET_REG, val); |
| if (ret < 0) |
| return ret; |
| |
| val = AS_TIMER_MS_TO_CODE(flash->timeout / 1000) |
| << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT; |
| |
| val |= (flash->pdata->vref << AS_INDICATOR_AND_TIMER_VREF_SHIFT) |
| | ((flash->indicator_current ? flash->indicator_current - 1 : 0) |
| << AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT); |
| |
| return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val); |
| } |
| |
| /* |
| * as3645a_set_control - Set flash control register |
| * @flash: The flash |
| * @mode: Desired output mode |
| * @on: Desired output state |
| * |
| * Configure the hardware with output mode and state. |
| * |
| * Return 0 on success, or a negative error code if an I2C communication error |
| * occurred. |
| */ |
| static int |
| as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on) |
| { |
| u8 reg; |
| |
| /* Configure output parameters and operation mode. */ |
| reg = (flash->pdata->peak << AS_CONTROL_COIL_PEAK_SHIFT) |
| | (on ? AS_CONTROL_OUT_ON : 0) |
| | mode; |
| |
| if (flash->led_mode == V4L2_FLASH_LED_MODE_FLASH && |
| flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL) { |
| reg |= AS_CONTROL_STROBE_TYPE_LEVEL |
| | AS_CONTROL_STROBE_ON; |
| } |
| |
| return as3645a_write(flash, AS_CONTROL_REG, reg); |
| } |
| |
| /* |
| * as3645a_set_output - Configure output and operation mode |
| * @flash: Flash controller |
| * @strobe: Strobe the flash (only valid in flash mode) |
| * |
| * Turn the LEDs output on/off and set the operation mode based on the current |
| * parameters. |
| * |
| * The AS3645A can't control the indicator LED independently of the flash/torch |
| * LED. If the flash controller is in V4L2_FLASH_LED_MODE_NONE mode, set the |
| * chip to indicator mode. Otherwise set it to assist light (torch) or flash |
| * mode. |
| * |
| * In indicator and assist modes, turn the output on/off based on the indicator |
| * and torch currents. In software strobe flash mode, turn the output on/off |
| * based on the strobe parameter. |
| */ |
| static int as3645a_set_output(struct as3645a *flash, bool strobe) |
| { |
| enum as_mode mode; |
| bool on; |
| |
| switch (flash->led_mode) { |
| case V4L2_FLASH_LED_MODE_NONE: |
| on = flash->indicator_current != 0; |
| mode = AS_MODE_INDICATOR; |
| break; |
| case V4L2_FLASH_LED_MODE_TORCH: |
| on = true; |
| mode = AS_MODE_ASSIST; |
| break; |
| case V4L2_FLASH_LED_MODE_FLASH: |
| on = strobe; |
| mode = AS_MODE_FLASH; |
| break; |
| default: |
| BUG(); |
| } |
| |
| /* Configure output parameters and operation mode. */ |
| return as3645a_set_control(flash, mode, on); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 controls |
| */ |
| |
| static int as3645a_is_active(struct as3645a *flash) |
| { |
| int ret; |
| |
| ret = as3645a_read(flash, AS_CONTROL_REG); |
| return ret < 0 ? ret : !!(ret & AS_CONTROL_OUT_ON); |
| } |
| |
| static int as3645a_read_fault(struct as3645a *flash) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev); |
| int rval; |
| |
| /* NOTE: reading register clear fault status */ |
| rval = as3645a_read(flash, AS_FAULT_INFO_REG); |
| if (rval < 0) |
| return rval; |
| |
| if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT) |
| dev_dbg(&client->dev, "Inductor Peak limit fault\n"); |
| |
| if (rval & AS_FAULT_INFO_INDICATOR_LED) |
| dev_dbg(&client->dev, "Indicator LED fault: " |
| "Short circuit or open loop\n"); |
| |
| dev_dbg(&client->dev, "%u connected LEDs\n", |
| rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1); |
| |
| if (rval & AS_FAULT_INFO_TIMEOUT) |
| dev_dbg(&client->dev, "Timeout fault\n"); |
| |
| if (rval & AS_FAULT_INFO_OVER_TEMPERATURE) |
| dev_dbg(&client->dev, "Over temperature fault\n"); |
| |
| if (rval & AS_FAULT_INFO_SHORT_CIRCUIT) |
| dev_dbg(&client->dev, "Short circuit fault\n"); |
| |
| if (rval & AS_FAULT_INFO_OVER_VOLTAGE) |
| dev_dbg(&client->dev, "Over voltage fault: " |
| "Indicates missing capacitor or open connection\n"); |
| |
| return rval; |
| } |
| |
| static int as3645a_get_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct as3645a *flash = |
| container_of(ctrl->handler, struct as3645a, ctrls); |
| struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev); |
| int value; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_FLASH_FAULT: |
| value = as3645a_read_fault(flash); |
| if (value < 0) |
| return value; |
| |
| ctrl->cur.val = 0; |
| if (value & AS_FAULT_INFO_SHORT_CIRCUIT) |
| ctrl->cur.val |= V4L2_FLASH_FAULT_SHORT_CIRCUIT; |
| if (value & AS_FAULT_INFO_OVER_TEMPERATURE) |
| ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_TEMPERATURE; |
| if (value & AS_FAULT_INFO_TIMEOUT) |
| ctrl->cur.val |= V4L2_FLASH_FAULT_TIMEOUT; |
| if (value & AS_FAULT_INFO_OVER_VOLTAGE) |
| ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_VOLTAGE; |
| if (value & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT) |
| ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_CURRENT; |
| if (value & AS_FAULT_INFO_INDICATOR_LED) |
| ctrl->cur.val |= V4L2_FLASH_FAULT_INDICATOR; |
| break; |
| |
| case V4L2_CID_FLASH_STROBE_STATUS: |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) { |
| ctrl->cur.val = 0; |
| break; |
| } |
| |
| value = as3645a_is_active(flash); |
| if (value < 0) |
| return value; |
| |
| ctrl->cur.val = value; |
| break; |
| } |
| |
| dev_dbg(&client->dev, "G_CTRL %08x:%d\n", ctrl->id, ctrl->cur.val); |
| |
| return 0; |
| } |
| |
| static int as3645a_set_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct as3645a *flash = |
| container_of(ctrl->handler, struct as3645a, ctrls); |
| struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev); |
| int ret; |
| |
| dev_dbg(&client->dev, "S_CTRL %08x:%d\n", ctrl->id, ctrl->val); |
| |
| /* If a control that doesn't apply to the current mode is modified, |
| * we store the value and return immediately. The setting will be |
| * applied when the LED mode is changed. Otherwise we apply the setting |
| * immediately. |
| */ |
| |
| switch (ctrl->id) { |
| case V4L2_CID_FLASH_LED_MODE: |
| if (flash->indicator_current) |
| return -EBUSY; |
| |
| ret = as3645a_set_config(flash); |
| if (ret < 0) |
| return ret; |
| |
| flash->led_mode = ctrl->val; |
| return as3645a_set_output(flash, false); |
| |
| case V4L2_CID_FLASH_STROBE_SOURCE: |
| flash->strobe_source = ctrl->val; |
| |
| /* Applies to flash mode only. */ |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) |
| break; |
| |
| return as3645a_set_output(flash, false); |
| |
| case V4L2_CID_FLASH_STROBE: |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) |
| return -EBUSY; |
| |
| return as3645a_set_output(flash, true); |
| |
| case V4L2_CID_FLASH_STROBE_STOP: |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) |
| return -EBUSY; |
| |
| return as3645a_set_output(flash, false); |
| |
| case V4L2_CID_FLASH_TIMEOUT: |
| flash->timeout = ctrl->val; |
| |
| /* Applies to flash mode only. */ |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) |
| break; |
| |
| return as3645a_set_config(flash); |
| |
| case V4L2_CID_FLASH_INTENSITY: |
| flash->flash_current = (ctrl->val - AS3645A_FLASH_INTENSITY_MIN) |
| / AS3645A_FLASH_INTENSITY_STEP; |
| |
| /* Applies to flash mode only. */ |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) |
| break; |
| |
| return as3645a_set_config(flash); |
| |
| case V4L2_CID_FLASH_TORCH_INTENSITY: |
| flash->assist_current = |
| (ctrl->val - AS3645A_TORCH_INTENSITY_MIN) |
| / AS3645A_TORCH_INTENSITY_STEP; |
| |
| /* Applies to torch mode only. */ |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_TORCH) |
| break; |
| |
| return as3645a_set_config(flash); |
| |
| case V4L2_CID_FLASH_INDICATOR_INTENSITY: |
| if (flash->led_mode != V4L2_FLASH_LED_MODE_NONE) |
| return -EBUSY; |
| |
| flash->indicator_current = |
| (ctrl->val - AS3645A_INDICATOR_INTENSITY_MIN) |
| / AS3645A_INDICATOR_INTENSITY_STEP; |
| |
| ret = as3645a_set_config(flash); |
| if (ret < 0) |
| return ret; |
| |
| if ((ctrl->val == 0) == (ctrl->cur.val == 0)) |
| break; |
| |
| return as3645a_set_output(flash, false); |
| } |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ctrl_ops as3645a_ctrl_ops = { |
| .g_volatile_ctrl = as3645a_get_ctrl, |
| .s_ctrl = as3645a_set_ctrl, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 subdev core operations |
| */ |
| |
| /* Put device into know state. */ |
| static int as3645a_setup(struct as3645a *flash) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev); |
| int ret; |
| |
| /* clear errors */ |
| ret = as3645a_read(flash, AS_FAULT_INFO_REG); |
| if (ret < 0) |
| return ret; |
| |
| dev_dbg(&client->dev, "Fault info: %02x\n", ret); |
| |
| ret = as3645a_set_config(flash); |
| if (ret < 0) |
| return ret; |
| |
| ret = as3645a_set_output(flash, false); |
| if (ret < 0) |
| return ret; |
| |
| /* read status */ |
| ret = as3645a_read_fault(flash); |
| if (ret < 0) |
| return ret; |
| |
| dev_dbg(&client->dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n", |
| as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG)); |
| dev_dbg(&client->dev, "AS_CURRENT_SET_REG: %02x\n", |
| as3645a_read(flash, AS_CURRENT_SET_REG)); |
| dev_dbg(&client->dev, "AS_CONTROL_REG: %02x\n", |
| as3645a_read(flash, AS_CONTROL_REG)); |
| |
| return ret & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0; |
| } |
| |
| static int __as3645a_set_power(struct as3645a *flash, int on) |
| { |
| int ret; |
| |
| if (!on) |
| as3645a_set_control(flash, AS_MODE_EXT_TORCH, false); |
| |
| if (flash->pdata->set_power) { |
| ret = flash->pdata->set_power(&flash->subdev, on); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (!on) |
| return 0; |
| |
| ret = as3645a_setup(flash); |
| if (ret < 0) { |
| if (flash->pdata->set_power) |
| flash->pdata->set_power(&flash->subdev, 0); |
| } |
| |
| return ret; |
| } |
| |
| static int as3645a_set_power(struct v4l2_subdev *sd, int on) |
| { |
| struct as3645a *flash = to_as3645a(sd); |
| int ret = 0; |
| |
| mutex_lock(&flash->power_lock); |
| |
| if (flash->power_count == !on) { |
| ret = __as3645a_set_power(flash, !!on); |
| if (ret < 0) |
| goto done; |
| } |
| |
| flash->power_count += on ? 1 : -1; |
| WARN_ON(flash->power_count < 0); |
| |
| done: |
| mutex_unlock(&flash->power_lock); |
| return ret; |
| } |
| |
| static int as3645a_registered(struct v4l2_subdev *sd) |
| { |
| struct as3645a *flash = to_as3645a(sd); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| int rval, man, model, rfu, version; |
| const char *vendor; |
| |
| /* Power up the flash driver and read manufacturer ID, model ID, RFU |
| * and version. |
| */ |
| rval = as3645a_set_power(&flash->subdev, 1); |
| if (rval < 0) |
| return rval; |
| |
| rval = as3645a_read(flash, AS_DESIGN_INFO_REG); |
| if (rval < 0) |
| goto power_off; |
| |
| man = AS_DESIGN_INFO_FACTORY(rval); |
| model = AS_DESIGN_INFO_MODEL(rval); |
| |
| rval = as3645a_read(flash, AS_VERSION_CONTROL_REG); |
| if (rval < 0) |
| goto power_off; |
| |
| rfu = AS_VERSION_CONTROL_RFU(rval); |
| version = AS_VERSION_CONTROL_VERSION(rval); |
| |
| /* Verify the chip model and version. */ |
| if (model != 0x01 || rfu != 0x00) { |
| dev_err(&client->dev, "AS3645A not detected " |
| "(model %d rfu %d)\n", model, rfu); |
| rval = -ENODEV; |
| goto power_off; |
| } |
| |
| switch (man) { |
| case 1: |
| vendor = "AMS, Austria Micro Systems"; |
| break; |
| case 2: |
| vendor = "ADI, Analog Devices Inc."; |
| break; |
| case 3: |
| vendor = "NSC, National Semiconductor"; |
| break; |
| case 4: |
| vendor = "NXP"; |
| break; |
| case 5: |
| vendor = "TI, Texas Instrument"; |
| break; |
| default: |
| vendor = "Unknown"; |
| } |
| |
| dev_info(&client->dev, "Chip vendor: %s (%d) Version: %d\n", vendor, |
| man, version); |
| |
| rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE); |
| if (rval < 0) |
| goto power_off; |
| |
| rval = as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE); |
| if (rval < 0) |
| goto power_off; |
| |
| /* Setup default values. This makes sure that the chip is in a known |
| * state, in case the power rail can't be controlled. |
| */ |
| rval = as3645a_setup(flash); |
| |
| power_off: |
| as3645a_set_power(&flash->subdev, 0); |
| |
| return rval; |
| } |
| |
| static int as3645a_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) |
| { |
| return as3645a_set_power(sd, 1); |
| } |
| |
| static int as3645a_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) |
| { |
| return as3645a_set_power(sd, 0); |
| } |
| |
| static const struct v4l2_subdev_core_ops as3645a_core_ops = { |
| .s_power = as3645a_set_power, |
| }; |
| |
| static const struct v4l2_subdev_ops as3645a_ops = { |
| .core = &as3645a_core_ops, |
| }; |
| |
| static const struct v4l2_subdev_internal_ops as3645a_internal_ops = { |
| .registered = as3645a_registered, |
| .open = as3645a_open, |
| .close = as3645a_close, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * I2C driver |
| */ |
| #ifdef CONFIG_PM |
| |
| static int as3645a_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct v4l2_subdev *subdev = i2c_get_clientdata(client); |
| struct as3645a *flash = to_as3645a(subdev); |
| int rval; |
| |
| if (flash->power_count == 0) |
| return 0; |
| |
| rval = __as3645a_set_power(flash, 0); |
| |
| dev_dbg(&client->dev, "Suspend %s\n", rval < 0 ? "failed" : "ok"); |
| |
| return rval; |
| } |
| |
| static int as3645a_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct v4l2_subdev *subdev = i2c_get_clientdata(client); |
| struct as3645a *flash = to_as3645a(subdev); |
| int rval; |
| |
| if (flash->power_count == 0) |
| return 0; |
| |
| rval = __as3645a_set_power(flash, 1); |
| |
| dev_dbg(&client->dev, "Resume %s\n", rval < 0 ? "fail" : "ok"); |
| |
| return rval; |
| } |
| |
| #else |
| |
| #define as3645a_suspend NULL |
| #define as3645a_resume NULL |
| |
| #endif /* CONFIG_PM */ |
| |
| /* |
| * as3645a_init_controls - Create controls |
| * @flash: The flash |
| * |
| * The number of LEDs reported in platform data is used to compute default |
| * limits. Parameters passed through platform data can override those limits. |
| */ |
| static int as3645a_init_controls(struct as3645a *flash) |
| { |
| const struct as3645a_platform_data *pdata = flash->pdata; |
| struct v4l2_ctrl *ctrl; |
| int maximum; |
| |
| v4l2_ctrl_handler_init(&flash->ctrls, 10); |
| |
| /* V4L2_CID_FLASH_LED_MODE */ |
| v4l2_ctrl_new_std_menu(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_LED_MODE, 2, ~7, |
| V4L2_FLASH_LED_MODE_NONE); |
| |
| /* V4L2_CID_FLASH_STROBE_SOURCE */ |
| v4l2_ctrl_new_std_menu(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_STROBE_SOURCE, |
| pdata->ext_strobe ? 1 : 0, |
| pdata->ext_strobe ? ~3 : ~1, |
| V4L2_FLASH_STROBE_SOURCE_SOFTWARE); |
| |
| flash->strobe_source = V4L2_FLASH_STROBE_SOURCE_SOFTWARE; |
| |
| /* V4L2_CID_FLASH_STROBE */ |
| v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_STROBE, 0, 0, 0, 0); |
| |
| /* V4L2_CID_FLASH_STROBE_STOP */ |
| v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0); |
| |
| /* V4L2_CID_FLASH_STROBE_STATUS */ |
| ctrl = v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_STROBE_STATUS, 0, 1, 1, 1); |
| if (ctrl != NULL) |
| ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
| |
| /* V4L2_CID_FLASH_TIMEOUT */ |
| maximum = pdata->timeout_max; |
| |
| v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_TIMEOUT, AS3645A_FLASH_TIMEOUT_MIN, |
| maximum, AS3645A_FLASH_TIMEOUT_STEP, maximum); |
| |
| flash->timeout = maximum; |
| |
| /* V4L2_CID_FLASH_INTENSITY */ |
| maximum = pdata->flash_max_current; |
| |
| v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_INTENSITY, AS3645A_FLASH_INTENSITY_MIN, |
| maximum, AS3645A_FLASH_INTENSITY_STEP, maximum); |
| |
| flash->flash_current = (maximum - AS3645A_FLASH_INTENSITY_MIN) |
| / AS3645A_FLASH_INTENSITY_STEP; |
| |
| /* V4L2_CID_FLASH_TORCH_INTENSITY */ |
| maximum = pdata->torch_max_current; |
| |
| v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_TORCH_INTENSITY, |
| AS3645A_TORCH_INTENSITY_MIN, maximum, |
| AS3645A_TORCH_INTENSITY_STEP, |
| AS3645A_TORCH_INTENSITY_MIN); |
| |
| flash->assist_current = 0; |
| |
| /* V4L2_CID_FLASH_INDICATOR_INTENSITY */ |
| v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_INDICATOR_INTENSITY, |
| AS3645A_INDICATOR_INTENSITY_MIN, |
| AS3645A_INDICATOR_INTENSITY_MAX, |
| AS3645A_INDICATOR_INTENSITY_STEP, |
| AS3645A_INDICATOR_INTENSITY_MIN); |
| |
| flash->indicator_current = 0; |
| |
| /* V4L2_CID_FLASH_FAULT */ |
| ctrl = v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops, |
| V4L2_CID_FLASH_FAULT, 0, |
| V4L2_FLASH_FAULT_OVER_VOLTAGE | |
| V4L2_FLASH_FAULT_TIMEOUT | |
| V4L2_FLASH_FAULT_OVER_TEMPERATURE | |
| V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0); |
| if (ctrl != NULL) |
| ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
| |
| flash->subdev.ctrl_handler = &flash->ctrls; |
| |
| return flash->ctrls.error; |
| } |
| |
| static int as3645a_probe(struct i2c_client *client, |
| const struct i2c_device_id *devid) |
| { |
| struct as3645a *flash; |
| int ret; |
| |
| if (client->dev.platform_data == NULL) |
| return -ENODEV; |
| |
| flash = kzalloc(sizeof(*flash), GFP_KERNEL); |
| if (flash == NULL) |
| return -ENOMEM; |
| |
| flash->pdata = client->dev.platform_data; |
| |
| v4l2_i2c_subdev_init(&flash->subdev, client, &as3645a_ops); |
| flash->subdev.internal_ops = &as3645a_internal_ops; |
| flash->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; |
| |
| ret = as3645a_init_controls(flash); |
| if (ret < 0) |
| goto done; |
| |
| ret = media_entity_init(&flash->subdev.entity, 0, NULL, 0); |
| if (ret < 0) |
| goto done; |
| |
| flash->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH; |
| |
| mutex_init(&flash->power_lock); |
| |
| flash->led_mode = V4L2_FLASH_LED_MODE_NONE; |
| |
| done: |
| if (ret < 0) { |
| v4l2_ctrl_handler_free(&flash->ctrls); |
| kfree(flash); |
| } |
| |
| return ret; |
| } |
| |
| static int __exit as3645a_remove(struct i2c_client *client) |
| { |
| struct v4l2_subdev *subdev = i2c_get_clientdata(client); |
| struct as3645a *flash = to_as3645a(subdev); |
| |
| v4l2_device_unregister_subdev(subdev); |
| v4l2_ctrl_handler_free(&flash->ctrls); |
| media_entity_cleanup(&flash->subdev.entity); |
| mutex_destroy(&flash->power_lock); |
| kfree(flash); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id as3645a_id_table[] = { |
| { AS3645A_NAME, 0 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(i2c, as3645a_id_table); |
| |
| static const struct dev_pm_ops as3645a_pm_ops = { |
| .suspend = as3645a_suspend, |
| .resume = as3645a_resume, |
| }; |
| |
| static struct i2c_driver as3645a_i2c_driver = { |
| .driver = { |
| .name = AS3645A_NAME, |
| .pm = &as3645a_pm_ops, |
| }, |
| .probe = as3645a_probe, |
| .remove = __exit_p(as3645a_remove), |
| .id_table = as3645a_id_table, |
| }; |
| |
| static int __init as3645a_init(void) |
| { |
| int rval; |
| |
| rval = i2c_add_driver(&as3645a_i2c_driver); |
| if (rval) |
| pr_err("%s: Failed to register the driver\n", AS3645A_NAME); |
| |
| return rval; |
| } |
| |
| static void __exit as3645a_exit(void) |
| { |
| i2c_del_driver(&as3645a_i2c_driver); |
| } |
| |
| module_init(as3645a_init); |
| module_exit(as3645a_exit); |
| |
| MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); |
| MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones"); |
| MODULE_LICENSE("GPL"); |