+++ /dev/null
-/*
- * drivers/media/i2c/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.
- *
- * 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 <linux/slab.h>
-
-#include <media/i2c/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 = devm_kzalloc(&client->dev, 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_pads_init(&flash->subdev.entity, 0, NULL);
- if (ret < 0)
- goto done;
-
- flash->subdev.entity.function = MEDIA_ENT_F_FLASH;
-
- mutex_init(&flash->power_lock);
-
- flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
-
-done:
- if (ret < 0)
- v4l2_ctrl_handler_free(&flash->ctrls);
-
- return ret;
-}
-
-static int 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);
-
- 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 = as3645a_remove,
- .id_table = as3645a_id_table,
-};
-
-module_i2c_driver(as3645a_i2c_driver);
-
-MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
-MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
-MODULE_LICENSE("GPL");
projects / linux.git / commitdiff