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raw | patch | inline | side by side (parent: 4b2e72d)
raw | patch | inline | side by side (parent: 4b2e72d)
author | Daniel jeong <daniel.jeong@ti.com> | |
Mon, 1 Dec 2014 05:50:46 +0000 (14:50 +0900) | ||
committer | Daniel jeong <daniel.jeong@ti.com> | |
Mon, 1 Dec 2014 05:50:46 +0000 (14:50 +0900) |
Signed-off-by: Daniel jeong <daniel.jeong@ti.com>
drivers/media/i2c/Kconfig | patch | blob | history | |
drivers/media/i2c/Makefile | patch | blob | history | |
drivers/media/i2c/lm3648.c | [new file with mode: 0644] | patch | blob |
include/media/lm3648.h | [new file with mode: 0644] | patch | blob |
index f2aac4eedd9d745ccc3a3e37f475a4f82f7dbfbb..d933011266438f18253b9ff8ed67b637cedf927b 100644 (file)
---help---
This is a driver for the lm3644 dual flash controllers. It controls
flash, torch and ir modes.
+
comment "Video improvement chips"
config VIDEO_UPD64031A
To compile this driver as a module, choose M here: the
module will be called upd64031a.
+config VIDEO_LM3648
+ tristate "LM3648 flash driver support"
+ depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
+ depends on MEDIA_CAMERA_SUPPORT
+ select REGMAP_I2C
+ ---help---
+ This is a driver for the lm3648 flash controllers. It controls
+ flash, torch and ir modes.
+
config VIDEO_UPD64083
tristate "NEC Electronics uPD64083 3-Dimensional Y/C separation"
depends on VIDEO_V4L2 && I2C
index a73441d568dc0350ae825903efa80fe02c14df1a..2194d71f63741f8513d451fe3e78ae120f5f64fd 100644 (file)
obj-$(CONFIG_VIDEO_LM3560) += lm3560.o
obj-$(CONFIG_VIDEO_LM3643) += lm3643.o
obj-$(CONFIG_VIDEO_LM3643) += lm3644.o
+obj-$(CONFIG_VIDEO_LM3648) += lm3648.o
obj-$(CONFIG_VIDEO_SMIAPP_PLL) += smiapp-pll.o
obj-$(CONFIG_VIDEO_AK881X) += ak881x.o
obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
diff --git a/drivers/media/i2c/lm3648.c b/drivers/media/i2c/lm3648.c
--- /dev/null
@@ -0,0 +1,401 @@
+/*
+ * drivers/media/i2c/lm3648.c
+ * General device driver for TI lm3648, Dual FLASH LED Driver
+ *
+ * Copyright (C) 2014 Texas Instruments
+ *
+ * Contact: Daniel Jeong <gshark.jeong@gmail.com>
+ * Ldd-Mlp <ldd-mlp@list.ti.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.
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <media/lm3648.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+/* registers definitions */
+#define REG_ENABLE 0x0c
+#define REG_TORCH_BR 0x05
+#define REG_FLASH_BR 0x03
+#define REG_FLASH_TOUT 0x08
+#define REG_FLAG1 0x0a
+#define REG_FLAG2 0x0b
+#define REG_STROBE_SRC 0x01
+
+#define MASK_ENABLE 0x03
+#define MASK_TORCH_BR 0x7f
+#define MASK_FLASH_BR 0x3f
+#define MASK_FLASH_TOUT 0x0f
+#define MASK_FLAG1 0xff
+#define MASK_FLAG2 0x1f
+#define MASK_STROBE_SRC 0x20
+
+/* Fault1 Mask */
+#define FAULT_TIMEOUT (1<<0)
+#define FAULT_UVLO (1<<1)
+#define FAULT_OVERTEMP (1<<2)
+#define FAULT_OCP (1<<3)
+#define FAULT_SHORT_CIRCUIT (0x7<<4)
+
+/* Fault2 Mask */
+#define FAULT_NTC_TRIP (0x19<<0)
+#define FAULT_OVP (1<<1)
+#define FAULT_IVFM (1<<2)
+
+enum led_mode {
+ MODE_SHDN = 0x00,
+ MODE_IR_DRV = 0x04,
+ MODE_TORCH = 0x08,
+ MODE_FLASH = 0x0c,
+};
+
+/*
+ * struct lm3648_flash
+ *
+ * @pdata: platform data
+ * @regmap: reg. map for i2c
+ * @lock: muxtex for serial access.
+ * @led_mode: V4L2 LED mode
+ * @ctrls_led: V4L2 contols
+ * @subdev_led: V4L2 subdev
+ * @mode_reg : mode register value
+ */
+struct lm3648_flash {
+ struct device *dev;
+ struct lm3648_platform_data *pdata;
+ struct regmap *regmap;
+
+ struct v4l2_ctrl_handler ctrls_led;
+ struct v4l2_subdev subdev_led;
+
+ u8 mode_reg;
+};
+
+#define to_lm3648_flash(_ctrl) \
+ container_of(_ctrl->handler, struct lm3648_flash, ctrls_led)
+
+/* enable mode control */
+static int lm3648_mode_ctrl(struct lm3648_flash *flash,
+ enum v4l2_flash_led_mode led_mode)
+{
+ switch (led_mode) {
+ case V4L2_FLASH_LED_MODE_NONE:
+ return regmap_write(flash->regmap,
+ REG_ENABLE, flash->mode_reg | MODE_SHDN);
+ case V4L2_FLASH_LED_MODE_IR:
+ return regmap_write(flash->regmap,
+ REG_ENABLE, flash->mode_reg | MODE_IR_DRV);
+ case V4L2_FLASH_LED_MODE_TORCH:
+ return regmap_write(flash->regmap,
+ REG_ENABLE, flash->mode_reg | MODE_TORCH);
+ case V4L2_FLASH_LED_MODE_FLASH:
+ return regmap_write(flash->regmap,
+ REG_ENABLE, flash->mode_reg | MODE_FLASH);
+ }
+ return -EINVAL;
+}
+
+/* V4L2 controls */
+static int lm3648_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct lm3648_flash *flash = to_lm3648_flash(ctrl);
+ unsigned int reg_val;
+ int rval;
+
+ if (ctrl->id != V4L2_CID_FLASH_FAULT)
+ return -EINVAL;
+
+ rval = regmap_read(flash->regmap, REG_FLAG1, ®_val);
+ if (rval < 0)
+ return rval;
+ ctrl->val = 0;
+ if (reg_val & FAULT_TIMEOUT)
+ ctrl->val |= V4L2_FLASH_FAULT_TIMEOUT;
+ if (reg_val & FAULT_UVLO)
+ ctrl->val |= V4L2_FLASH_FAULT_UNDER_VOLTAGE;
+ if (reg_val & FAULT_OVERTEMP)
+ ctrl->val |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
+ if (reg_val & FAULT_OCP)
+ ctrl->val |= V4L2_FLASH_FAULT_OVER_CURRENT;
+ if (reg_val & FAULT_SHORT_CIRCUIT)
+ ctrl->val |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
+
+ rval = regmap_read(flash->regmap, REG_FLAG2, ®_val);
+ if (rval < 0)
+ return rval;
+ if (reg_val & FAULT_NTC_TRIP)
+ ctrl->val |= V4L2_FLASH_FAULT_LED_OVER_TEMPERATURE;
+ if (reg_val & FAULT_OVP)
+ ctrl->val |= V4L2_FLASH_FAULT_OVER_VOLTAGE;
+ if (reg_val & FAULT_IVFM)
+ ctrl->val |= V4L2_FLASH_FAULT_INPUT_VOLTAGE;
+
+ return 0;
+}
+
+static int lm3648_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct lm3648_flash *flash = to_lm3648_flash(ctrl);
+ unsigned int reg_val;
+ int rval = -EINVAL;
+
+ switch (ctrl->id) {
+ case V4L2_CID_FLASH_LED_MODE:
+
+ if (ctrl->val != V4L2_FLASH_LED_MODE_FLASH)
+ return lm3648_mode_ctrl(flash, ctrl->val);
+ /* switch to SHDN mode before flash strobe on */
+ return lm3648_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);
+
+ case V4L2_CID_FLASH_STROBE_SOURCE:
+ return regmap_update_bits(flash->regmap,
+ REG_STROBE_SRC, MASK_STROBE_SRC,
+ (ctrl->val) << 5);
+
+ case V4L2_CID_FLASH_STROBE:
+
+ /* read and check current mode of chip to start flash */
+ rval = regmap_read(flash->regmap, REG_ENABLE, ®_val);
+ if (rval < 0 || ((reg_val & MASK_ENABLE) != MODE_SHDN))
+ return rval;
+ /* flash on */
+ return lm3648_mode_ctrl(flash, V4L2_FLASH_LED_MODE_FLASH);
+
+ case V4L2_CID_FLASH_STROBE_STOP:
+
+ /*
+ * flash mode will be turned automatically
+ * from FLASH mode to SHDN mode after flash duration timeout
+ * read and check current mode of chip to stop flash
+ */
+ rval = regmap_read(flash->regmap, REG_ENABLE, ®_val);
+ if (rval < 0)
+ return rval;
+ if ((reg_val & MASK_ENABLE) == MODE_FLASH)
+ return lm3648_mode_ctrl(flash,
+ V4L2_FLASH_LED_MODE_NONE);
+ return rval;
+
+ case V4L2_CID_FLASH_TIMEOUT:
+ return regmap_update_bits(flash->regmap,
+ REG_FLASH_TOUT, MASK_FLASH_TOUT,
+ LM3648_FLASH_TOUT_ms_TO_REG
+ (ctrl->val));
+
+ case V4L2_CID_FLASH_INTENSITY:
+ return regmap_update_bits(flash->regmap,
+ REG_FLASH_BR, MASK_FLASH_BR,
+ LM3648_FLASH_BRT_uA_TO_REG
+ (ctrl->val));
+
+ case V4L2_CID_FLASH_TORCH_INTENSITY:
+ return regmap_update_bits(flash->regmap,
+ REG_TORCH_BR, MASK_TORCH_BR,
+ LM3648_TORCH_BRT_uA_TO_REG
+ (ctrl->val));
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops lm3648_led_ctrl_ops = {
+ .g_volatile_ctrl = lm3648_get_ctrl,
+ .s_ctrl = lm3648_set_ctrl,
+};
+
+static int lm3648_init_controls(struct lm3648_flash *flash)
+{
+ struct v4l2_ctrl *fault;
+ struct v4l2_ctrl_handler *hdl = &flash->ctrls_led;
+ const struct v4l2_ctrl_ops *ops = &lm3648_led_ctrl_ops;
+
+ v4l2_ctrl_handler_init(hdl, 8);
+ /* flash mode */
+ v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_LED_MODE,
+ V4L2_FLASH_LED_MODE_TORCH, ~0x7,
+ V4L2_FLASH_LED_MODE_NONE);
+
+ /* flash source */
+ v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_STROBE_SOURCE,
+ 0x1, ~0x3, V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
+
+ /* flash strobe */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
+ /* flash strobe stop */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
+
+ /* flash strobe timeout */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TIMEOUT,
+ LM3648_FLASH_TOUT_MIN,
+ LM3648_FLASH_TOUT_MAX,
+ LM3648_FLASH_TOUT_LOW_STEP, flash->pdata->flash_timeout);
+
+ /* max flash current */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY,
+ LM3648_FLASH_BRT_MIN,
+ LM3648_FLASH_BRT_MAX,
+ LM3648_FLASH_BRT_STEP,
+ LM3648_FLASH_BRT_MAX);
+
+ /* max torch current */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY,
+ LM3648_TORCH_BRT_MIN,
+ LM3648_TORCH_BRT_MAX,
+ LM3648_TORCH_BRT_STEP,
+ LM3648_TORCH_BRT_MAX);
+
+ /* fault */
+ fault = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_FAULT, 0,
+ V4L2_FLASH_FAULT_OVER_VOLTAGE
+ | V4L2_FLASH_FAULT_OVER_TEMPERATURE
+ | V4L2_FLASH_FAULT_SHORT_CIRCUIT
+ | V4L2_FLASH_FAULT_TIMEOUT, 0, 0);
+ if (fault != NULL)
+ fault->flags |= V4L2_CTRL_FLAG_VOLATILE;
+
+ if (hdl->error)
+ return hdl->error;
+
+ flash->subdev_led.ctrl_handler = hdl;
+ return 0;
+}
+
+/* initialize device */
+static const struct v4l2_subdev_ops lm3648_ops = {
+ .core = NULL,
+};
+
+static const struct regmap_config lm3648_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xFF,
+};
+
+static int lm3648_subdev_init(struct lm3648_flash *flash)
+{
+ struct i2c_client *client = to_i2c_client(flash->dev);
+ int rval;
+
+ v4l2_i2c_subdev_init(&flash->subdev_led, client, &lm3648_ops);
+ flash->subdev_led.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ strcpy(flash->subdev_led.name, LM3648_NAME);
+ rval = lm3648_init_controls(flash);
+ if (rval)
+ goto err_out;
+ rval = media_entity_init(&flash->subdev_led.entity, 0, NULL, 0);
+ if (rval < 0)
+ goto err_out;
+ flash->subdev_led.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
+ return rval;
+
+err_out:
+ v4l2_ctrl_handler_free(&flash->ctrls_led);
+ return rval;
+}
+
+static int lm3648_init_device(struct lm3648_flash *flash)
+{
+ unsigned int reg_val;
+ int rval;
+
+ /* read the value of mode register to reduce redundant i2c accesses */
+ rval = regmap_read(flash->regmap, REG_ENABLE, ®_val);
+ if (rval < 0)
+ return rval;
+ flash->mode_reg = reg_val & 0xfc;
+
+ /* output disable */
+ rval = lm3648_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);
+ if (rval < 0)
+ return rval;
+
+ /* Reset flag register */
+ rval = regmap_read(flash->regmap, REG_FLAG1, ®_val);
+ if (rval < 0)
+ return rval;
+ return regmap_read(flash->regmap, REG_FLAG2, ®_val);
+}
+
+static int lm3648_probe(struct i2c_client *client,
+ const struct i2c_device_id *devid)
+{
+ struct lm3648_flash *flash;
+ struct lm3648_platform_data *pdata = dev_get_platdata(&client->dev);
+ int rval;
+
+ flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
+ if (flash == NULL)
+ return -ENOMEM;
+
+ flash->regmap = devm_regmap_init_i2c(client, &lm3648_regmap);
+ if (IS_ERR(flash->regmap))
+ return PTR_ERR(flash->regmap);
+
+ /* check device tree if there is no platform data */
+ if (pdata == NULL) {
+ pdata = devm_kzalloc(&client->dev,
+ sizeof(struct lm3648_platform_data),
+ GFP_KERNEL);
+ if (pdata == NULL)
+ return -ENOMEM;
+ /* use default data in case of no platform data */
+ pdata->flash_timeout = LM3648_FLASH_TOUT_MAX;
+ }
+ flash->pdata = pdata;
+ flash->dev = &client->dev;
+
+ rval = lm3648_subdev_init(flash);
+ if (rval < 0)
+ return rval;
+
+ rval = lm3648_init_device(flash);
+ if (rval < 0)
+ return rval;
+
+ i2c_set_clientdata(client, flash);
+
+ return 0;
+}
+
+static int lm3648_remove(struct i2c_client *client)
+{
+ struct lm3648_flash *flash = i2c_get_clientdata(client);
+
+ v4l2_device_unregister_subdev(&flash->subdev_led);
+ v4l2_ctrl_handler_free(&flash->ctrls_led);
+ media_entity_cleanup(&flash->subdev_led.entity);
+
+ return 0;
+}
+
+static const struct i2c_device_id lm3648_id_table[] = {
+ {LM3648_NAME, 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm3648_id_table);
+
+static struct i2c_driver lm3648_i2c_driver = {
+ .driver = {
+ .name = LM3648_NAME,
+ },
+ .probe = lm3648_probe,
+ .remove = lm3648_remove,
+ .id_table = lm3648_id_table,
+};
+
+module_i2c_driver(lm3648_i2c_driver);
+
+MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
+MODULE_AUTHOR("Ldd Mlp <ldd-mlp@list.ti.com>");
+MODULE_DESCRIPTION("Texas Instruments LM3648 Flash LED driver");
+MODULE_LICENSE("GPL");
diff --git a/include/media/lm3648.h b/include/media/lm3648.h
--- /dev/null
+++ b/include/media/lm3648.h
@@ -0,0 +1,69 @@
+/*
+ * include/media/lm3648.h
+ *
+ * Copyright (C) 2014 Texas Instruments
+ *
+ * Contact: Daniel Jeong <gshark.jeong@gmail.com>
+ * Ldd-Mlp <ldd-mlp@list.ti.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.
+ */
+
+#ifndef __LM3648_H__
+#define __LM3648_H__
+
+#include <media/v4l2-subdev.h>
+
+#define LM3648_NAME "lm3648"
+#define LM3648_I2C_ADDR (0x63)
+
+/* TOTAL FLASH Brightness Max
+ * min 21800uA, step 23450uA, max 1500000uA
+ */
+#define LM3648_FLASH_BRT_MIN 21800
+#define LM3648_FLASH_BRT_STEP 23450
+#define LM3648_FLASH_BRT_MAX 1500000
+#define LM3648_FLASH_BRT_uA_TO_REG(a) \
+ ((a) < LM3648_FLASH_BRT_MIN ? 0 : \
+ ((((a) - LM3648_FLASH_BRT_MIN) / LM3648_FLASH_BRT_STEP)))
+
+/* TOTAL TORCH Brightness Max
+ * min 1954uA, step 2800uA, max 357600uA
+ */
+#define LM3648_TORCH_BRT_MIN 1954
+#define LM3648_TORCH_BRT_STEP 2800
+#define LM3648_TORCH_BRT_MAX 357600
+#define LM3648_TORCH_BRT_uA_TO_REG(a) \
+ ((a) < LM3648_TORCH_BRT_MIN ? 0 : \
+ ((((a) - LM3648_TORCH_BRT_MIN) / LM3648_TORCH_BRT_STEP)))
+
+/* FLASH TIMEOUT DURATION
+ * min 10ms, max 400ms
+ * step 10ms in range from 10ms to 100ms
+ * setp 50ms in range from 100ms to 400ms
+ */
+#define LM3648_FLASH_TOUT_MIN 10
+#define LM3648_FLASH_TOUT_LOW_STEP 10
+#define LM3648_FLASH_TOUT_LOW_MAX 100
+#define LM3648_FLASH_TOUT_HIGH_STEP 50
+#define LM3648_FLASH_TOUT_MAX 400
+#define LM3648_FLASH_TOUT_ms_TO_REG(a) \
+ ((a) < LM3648_FLASH_TOUT_MIN ? 0 : \
+ ((a) <= LM3648_FLASH_TOUT_LOW_MAX ? \
+ (((a) - LM3648_FLASH_TOUT_MIN) / LM3648_FLASH_TOUT_LOW_STEP) : \
+ ((((a) - LM3648_FLASH_TOUT_LOW_MAX) / LM3648_FLASH_TOUT_HIGH_STEP) \
+ +((LM3648_FLASH_TOUT_LOW_MAX - LM3648_FLASH_TOUT_MIN) \
+ / LM3648_FLASH_TOUT_LOW_STEP))))
+
+/* struct lm3648_platform_data
+ *
+ * @flash_timeout: flash timeout
+ */
+struct lm3648_platform_data {
+
+ u32 flash_timeout;
+};
+
+#endif /* __LM3648_H__ */