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raw | patch | inline | side by side (parent: 054595f)
raw | patch | inline | side by side (parent: 054595f)
author | Daniel Jeong <gshark.jeong@gmail.com> | |
Thu, 26 Feb 2015 12:23:21 +0000 (21:23 +0900) | ||
committer | Daniel Jeong <gshark.jeong@gmail.com> | |
Thu, 26 Feb 2015 12:23:21 +0000 (21:23 +0900) |
Signed-off-by: Daniel Jeong <gshark.jeong@gmail.com>
drivers/media/i2c/Kconfig | patch | blob | history | |
drivers/media/i2c/Makefile | patch | blob | history | |
drivers/media/i2c/lm3632-flash.c | [new file with mode: 0644] | patch | blob |
drivers/mfd/lm3632.c | patch | blob | history |
index e97ec62a961c5eed1298225c8c4c4e68aa3e3656..12493e024c0c165fab12c0533871752787f3a429 100644 (file)
This is a driver for the lm3560 dual flash controllers. It controls
flash, torch LEDs.
+config VIDEO_LM3632
+ tristate "LM3632 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 lm3632 single flash controllers. It controls
+ flash, torch LEDs.
+
config VIDEO_LM3643
tristate "LM3643 dual flash driver support"
depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
index a44dc11dc026e3252402a3bec7484acab0f684f5..9fe54049877174ab453c1f99f30a92e6191cad99 100644 (file)
obj-$(CONFIG_VIDEO_ADP1653) += adp1653.o
obj-$(CONFIG_VIDEO_AS3645A) += as3645a.o
obj-$(CONFIG_VIDEO_LM3560) += lm3560.o
+obj-$(CONFIG_VIDEO_LM3632) += lm3632-flash.o
obj-$(CONFIG_VIDEO_LM3643) += lm3643.o
obj-$(CONFIG_VIDEO_LM3643) += lm3644.o
obj-$(CONFIG_VIDEO_LM3648) += lm3648.o
diff --git a/drivers/media/i2c/lm3632-flash.c b/drivers/media/i2c/lm3632-flash.c
--- /dev/null
@@ -0,0 +1,523 @@
+/*
+ * TI LM3632 Backlight Driver
+ *
+ * Copyright (C) 2015 Texas Instruments
+ *
+ * Author: Daniel Jeong <daniel.jeong@ti.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/err.h>
+#include <linux/mfd/lm3632.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+/* operation mode */
+enum led_opmode {
+ OPMODE_SHDN = 0x00,
+ OPMODE_TORCH = 0x01,
+ OPMODE_FLASH = 0x03,
+};
+
+/*
+ * register data
+ * @reg : register
+ * @mask : mask bits
+ * @shift : bit shift of data
+ */
+struct ctrl_reg {
+ unsigned int reg;
+ unsigned int mask;
+ unsigned int shift;
+};
+
+/*
+ * unit data
+ * @min : min value of brightness or timeout
+ * brightness : uA
+ * timeout : ms
+ * @step : step value of brightness or timeout
+ * brightness : uA
+ * timeout : ms
+ * @knee: knee point of step of brightness/timeout
+ * brightness : uA
+ * timeout : ms
+ * @knee_step : step value of brightness or timeout after knee point
+ * brightness : uA
+ * timeout : ms
+ * @max : max value of brightness or timeout
+ * brightness : uA
+ * timeout : ms
+ * @ctrl : register info to control brightness or timeout
+ */
+struct ssflash_config {
+ unsigned int min;
+ unsigned int step;
+ unsigned int knee;
+ unsigned int knee_step;
+ unsigned int max;
+ struct ctrl_reg ctrl;
+};
+
+/*
+ * @reg : fault register
+ * @mask : fault mask bit
+ * @v4l2_fault : bit mapping to V4L2_FLASH_FAULT_
+ * refer to include//uapi/linux/v4l2-controls.h
+ */
+struct ssflash_fault {
+ unsigned int reg;
+ unsigned int mask;
+ unsigned int v4l2_fault;
+};
+
+#define NUM_V4L2_FAULT 9
+
+/*
+ * ssflash data
+ * @name: device name
+ * @mode: operation mode control data
+ * @flash_br: flash brightness register and bit data
+ * @timeout: timeout control data
+ * @strobe: strobe control data
+ * @torch_br: torch brightness register and bit data
+ * @fault: fault data
+ * @func: initialize function
+ */
+struct ssflash_data {
+ char *name;
+ struct ctrl_reg mode;
+ struct ssflash_config flash_br;
+ struct ssflash_config timeout;
+ struct ctrl_reg strobe;
+
+ struct ssflash_config torch_br;
+ struct ssflash_fault fault[NUM_V4L2_FAULT];
+
+ int (*func)(struct lm3632 *lm3632);
+};
+
+/*
+ * struct ssflash_flash
+ * @dev: device
+ * @ctrls_led: V4L2 contols
+ * @subdev_led: V4L2 subdev
+ * @data : chip control data
+ */
+struct ssflash_flash {
+ struct device *dev;
+ struct lm3632 *lm3632;
+ struct v4l2_ctrl_handler ctrls_led;
+ struct v4l2_subdev subdev_led;
+ const struct ssflash_data *data;
+};
+
+#define to_ssflash_flash(_ctrl) \
+ container_of(_ctrl->handler, struct ssflash_flash, ctrls_led)
+
+static int ssflash_lm3632_init(struct lm3632 *lm3632)
+{
+ int rval;
+ /* disable flash enable */
+ rval = lm3632_update_bits(lm3632, 0x0a, 0x06, 0x00);
+ /* torch 150mA, flash 200mA */
+ rval |= lm3632_update_bits(lm3632, 0x06, 0xff, 0x51);
+ return rval;
+}
+
+static const struct ssflash_data flash_lm3632 = {
+ .name = "lm3632_flash",
+ .mode = {
+ .reg = 0x0a, .mask = 0x06, .shift = 1
+ },
+ .flash_br = {
+ .min = 100000, .step = 100000, .max = 1500000,
+ .ctrl = {
+ .reg = 0x06, .mask = 0x0f, .shift = 0
+ },
+ },
+ .timeout = {
+ .min = 32, .step = 32, .max = 1024,
+ .ctrl = {
+ .reg = 0x07, .mask = 0x1f, .shift = 0
+ }
+ },
+ .torch_br = {
+ .min = 25000, .step = 25000, .max = 375000,
+ .ctrl = {
+ .reg = 0x06, .mask = 0xf0, .shift = 4
+ }
+ },
+ .strobe = {
+ .reg = 0x09, .mask = 0x10, .shift = 4
+ },
+ .fault = {
+ [0] = {
+ .reg = 0x0b, .mask = 0x02,
+ .v4l2_fault = V4L2_FLASH_FAULT_TIMEOUT,
+ },
+ [1] = {
+ .reg = 0x0b, .mask = 0x02,
+ .v4l2_fault = V4L2_FLASH_FAULT_OVER_TEMPERATURE,
+ },
+ [2] = {
+ .reg = 0x0b, .mask = 0x04,
+ .v4l2_fault = V4L2_FLASH_FAULT_SHORT_CIRCUIT,
+ },
+ [3] = {
+ .reg = 0x0b, .mask = 0x08,
+ .v4l2_fault = V4L2_FLASH_FAULT_OVER_VOLTAGE,
+ },
+ },
+ .func = ssflash_lm3632_init
+};
+
+static u8 ssflash_conv_val_to_reg(unsigned int val,
+ unsigned int min, unsigned int step,
+ unsigned int knee, unsigned int knee_step,
+ unsigned int max)
+{
+ if (val >= max)
+ return 0xff;
+
+ if (knee <= min)
+ return (u8)(val < min ? 0 : (val - min)/step);
+ return (u8)val < min ? 0 :
+ (val < knee ? (val-min)/step :
+ (val-knee)/knee_step + (knee-min)/step);
+}
+
+/* mode control */
+static int ssflash_mode_ctrl(struct ssflash_flash *flash,
+ enum v4l2_flash_led_mode v4l_led_mode)
+{
+ const struct ssflash_data *data = flash->data;
+ enum led_opmode opmode;
+
+ switch (v4l_led_mode) {
+ case V4L2_FLASH_LED_MODE_NONE:
+ opmode = OPMODE_SHDN;
+ break;
+ case V4L2_FLASH_LED_MODE_TORCH:
+ opmode = OPMODE_TORCH;
+ break;
+ case V4L2_FLASH_LED_MODE_FLASH:
+ opmode = OPMODE_FLASH;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return lm3632_update_bits(flash->lm3632, data->mode.reg,
+ data->mode.mask, opmode << data->mode.shift);
+}
+
+/* torch brightness control */
+static int ssflash_torch_brt_ctrl
+ (struct ssflash_flash *flash, unsigned int brt)
+{
+ const struct ssflash_data *data = flash->data;
+ int rval;
+ u8 br_bits;
+
+ br_bits = ssflash_conv_val_to_reg(brt,
+ data->torch_br.min, data->torch_br.step,
+ data->torch_br.knee, data->torch_br.knee_step,
+ data->torch_br.max);
+
+ rval = lm3632_update_bits(flash->lm3632,
+ data->torch_br.ctrl.reg,
+ data->torch_br.ctrl.mask,
+ br_bits << data->torch_br.ctrl.shift);
+
+ return rval;
+}
+
+/* flash brightness control */
+static int ssflash_flash_brt_ctrl(struct ssflash_flash *flash,
+ unsigned int brt)
+{
+ const struct ssflash_data *data = flash->data;
+ int rval;
+ u8 br_bits;
+
+ br_bits = ssflash_conv_val_to_reg(brt,
+ data->flash_br.min,
+ data->flash_br.step,
+ data->flash_br.knee,
+ data->flash_br.knee_step,
+ data->flash_br.max);
+
+ rval = lm3632_update_bits(flash->lm3632,
+ data->flash_br.ctrl.reg,
+ data->flash_br.ctrl.mask,
+ br_bits << data->flash_br.ctrl.shift);
+
+ return rval;
+}
+
+/* fault status */
+static int ssflash_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+ return -EINVAL;
+}
+
+static int ssflash_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct ssflash_flash *flash = to_ssflash_flash(ctrl);
+ const struct ssflash_data *data = flash->data;
+ u8 tout_bits, reg_val;
+ int rval = -EINVAL;
+
+ switch (ctrl->id) {
+ case V4L2_CID_FLASH_LED_MODE:
+ if (ctrl->val != V4L2_FLASH_LED_MODE_FLASH)
+ return ssflash_mode_ctrl(flash, ctrl->val);
+ /* switch to SHDN mode before flash strobe on */
+ rval = ssflash_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);
+ rval |= ssflash_mode_ctrl(flash, ctrl->val);
+ return rval;
+
+ case V4L2_CID_FLASH_TORCH_INTENSITY:
+ return ssflash_torch_brt_ctrl(flash, ctrl->val);
+
+ case V4L2_CID_FLASH_INTENSITY:
+ return ssflash_flash_brt_ctrl(flash, ctrl->val);
+
+ case V4L2_CID_FLASH_STROBE_SOURCE:
+ return lm3632_update_bits(flash->lm3632,
+ data->strobe.reg, data->strobe.mask,
+ (ctrl->val) << data->strobe.shift);
+
+ case V4L2_CID_FLASH_STROBE:
+ /* read and check current mode of chip to start flash */
+ rval = lm3632_read_byte(flash->lm3632,
+ data->mode.reg, ®_val);
+ if (rval < 0 ||
+ (((reg_val & data->mode.mask)>>data->mode.shift)
+ != OPMODE_SHDN))
+ return rval;
+ /* flash on */
+ return ssflash_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 = lm3632_read_byte(flash->lm3632,
+ data->mode.reg, ®_val);
+ if (rval < 0)
+ return rval;
+ if (((reg_val & data->mode.mask)
+ >> data->mode.shift) == OPMODE_FLASH)
+ return ssflash_mode_ctrl(flash,
+ V4L2_FLASH_LED_MODE_NONE);
+ return rval;
+
+ case V4L2_CID_FLASH_TIMEOUT:
+ tout_bits = ssflash_conv_val_to_reg(ctrl->val,
+ data->timeout.min,
+ data->timeout.step,
+ data->timeout.knee,
+ data->timeout.knee_step,
+ data->timeout.max);
+
+ rval = lm3632_update_bits(flash->lm3632,
+ data->timeout.ctrl.reg,
+ data->timeout.ctrl.mask,
+ tout_bits << data->timeout.ctrl.shift);
+ }
+ return rval;
+}
+
+static int ssflash_led_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+ return ssflash_get_ctrl(ctrl);
+}
+
+static int ssflash_led_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ return ssflash_set_ctrl(ctrl);
+}
+
+static const struct v4l2_ctrl_ops ssflash_led_ctrl_ops = {
+ .g_volatile_ctrl = ssflash_led_get_ctrl,
+ .s_ctrl = ssflash_led_set_ctrl,
+};
+
+static int ssflash_init_controls(struct ssflash_flash *flash)
+{
+ struct v4l2_ctrl *fault;
+ struct v4l2_ctrl_handler *hdl = &flash->ctrls_led;
+ const struct v4l2_ctrl_ops *ops = &ssflash_led_ctrl_ops;
+ const struct ssflash_data *data = flash->data;
+ s64 fault_max = 0;
+ int icnt;
+
+ 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,
+ data->timeout.min,
+ data->timeout.max,
+ data->timeout.step,
+ data->timeout.max);
+ /* flash brt */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY,
+ data->flash_br.min,
+ data->flash_br.max,
+ data->flash_br.step,
+ data->flash_br.max);
+ /* torch brt */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY,
+ data->torch_br.min,
+ data->torch_br.max,
+ data->torch_br.step,
+ data->torch_br.max);
+ /* fault */
+ for (icnt = 0; icnt < NUM_V4L2_FAULT; icnt++)
+ fault_max |= data->fault[icnt].v4l2_fault;
+ fault = v4l2_ctrl_new_std(hdl,
+ ops, V4L2_CID_FLASH_FAULT, 0, fault_max, 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 ssflash_ops = {
+ .core = NULL,
+};
+
+static int ssflash_subdev_init(struct ssflash_flash *flash)
+{
+ int rval;
+
+ v4l2_subdev_init(&flash->subdev_led, &ssflash_ops);
+ flash->subdev_led.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ strcpy(flash->subdev_led.name, flash->data->name);
+
+ rval = ssflash_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 ssflash_init_device(struct ssflash_flash *flash)
+{
+ int rval;
+
+ /* output disable */
+ rval = ssflash_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);
+ if (rval < 0)
+ return rval;
+
+ if (flash->data->func != NULL) {
+ rval = flash->data->func(flash->lm3632);
+ if (rval < 0)
+ return rval;
+ }
+
+ return rval;
+}
+
+static int lm3632_flash_probe(struct platform_device *pdev)
+{
+ struct lm3632 *lm3632 = dev_get_drvdata(pdev->dev.parent);
+ struct ssflash_flash *flash;
+ int rval;
+
+ flash = devm_kzalloc(&pdev->dev, sizeof(*flash), GFP_KERNEL);
+ if (flash == NULL)
+ return -ENOMEM;
+
+ flash->dev = &pdev->dev;
+ flash->lm3632 = lm3632;
+ flash->data = (const struct ssflash_data *)&flash_lm3632;
+ platform_set_drvdata(pdev, flash);
+
+ rval = ssflash_subdev_init(flash);
+ if (rval < 0)
+ return rval;
+
+ rval = ssflash_init_device(flash);
+ if (rval < 0)
+ return rval;
+
+ return 0;
+}
+
+static int lm3632_flash_remove(struct platform_device *pdev)
+{
+ struct ssflash_flash *flash = platform_get_drvdata(pdev);
+
+ v4l2_device_unregister_subdev(&flash->subdev_led);
+ v4l2_ctrl_handler_free(&flash->ctrls_led);
+ media_entity_cleanup(&flash->subdev_led.entity);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id lm3632_flash_of_match[] = {
+ { .compatible = "ti,lm3632-flash", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lm3632_flash_of_match);
+#endif
+
+static struct platform_driver lm3632_flash_driver = {
+ .probe = lm3632_flash_probe,
+ .remove = lm3632_flash_remove,
+ .driver = {
+ .name = "lm3632-flash",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(lm3632_flash_of_match),
+ },
+};
+module_platform_driver(lm3632_flash_driver);
+
+MODULE_DESCRIPTION("TI LM3632 Flash Driver");
+MODULE_AUTHOR("Daniel Jeong");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lm3632-flash");
diff --git a/drivers/mfd/lm3632.c b/drivers/mfd/lm3632.c
index 4e0e98cf6c6b58222fcb8811f4c0436ccbdd8e7c..d33917c5262595d0a50f8f874b4f9e1efdf829ba 100644 (file)
--- a/drivers/mfd/lm3632.c
+++ b/drivers/mfd/lm3632.c
.of_compatible = "ti,lm3632-backlight", \
}
+#define LM3632_DEV_FLASH \
+{ \
+ .name = "lm3632-flash", \
+ .of_compatible = "ti,lm3632-flash", \
+}
+
+static struct mfd_cell lm3632_devs[] = {
static struct mfd_cell lm3632_devs[] = {
/* 3 Regulators */
LM3632_DEV_LCD_BIAS(1),
/* Backlight */
LM3632_DEV_BL,
+ /* Torch Flash */
+ LM3632_DEV_FLASH,
};
int lm3632_read_byte(struct lm3632 *lm3632, u8 reg, u8 *read)