3 files changed, 498 insertions, 0 deletions

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index d18be19c96cd..75c8a035539a 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -621,6 +621,15 @@ config VIDEO_AS3645A
           This is a driver for the AS3645A and LM3555 flash controllers. It has
           build in control for flash, torch and indicator LEDs.
 
+config VIDEO_LM3560
+        tristate "LM3560 dual 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 lm3560 dual flash controllers. It controls
+          flash, torch LEDs.
+
 comment "Video improvement chips"
 
 config VIDEO_UPD64031A
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 9f462df77b4a..e03f1776f4f4 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_VIDEO_S5K4ECGX)	+= s5k4ecgx.o
 obj-$(CONFIG_VIDEO_S5C73M3)     += s5c73m3/
 obj-$(CONFIG_VIDEO_ADP1653)     += adp1653.o
 obj-$(CONFIG_VIDEO_AS3645A)     += as3645a.o
+obj-$(CONFIG_VIDEO_LM3560)      += lm3560.o
 obj-$(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/lm3560.c b/drivers/media/i2c/lm3560.c
new file mode 100644
index 000000000000..3317a9ae3961
--- /dev/null
+++ b/drivers/media/i2c/lm3560.c
@@ -0,0 +1,488 @@
+/*
+ * drivers/media/i2c/lm3560.c
+ * General device driver for TI lm3560, FLASH LED Driver
+ *
+ * Copyright (C) 2013 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.
+ *
+ * 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
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/videodev2.h>
+#include <media/lm3560.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+/* registers definitions */
+#define REG_ENABLE              0x10
+#define REG_TORCH_BR    0xa0
+#define REG_FLASH_BR    0xb0
+#define REG_FLASH_TOUT  0xc0
+#define REG_FLAG                0xd0
+#define REG_CONFIG1             0xe0
+
+/* Fault Mask */
+#define FAULT_TIMEOUT   (1<<0)
+#define FAULT_OVERTEMP  (1<<1)
+#define FAULT_SHORT_CIRCUIT     (1<<2)
+
+enum led_enable {
+        MODE_SHDN = 0x0,
+        MODE_TORCH = 0x2,
+        MODE_FLASH = 0x3,
+};
+
+/* struct lm3560_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
+ */
+struct lm3560_flash {
+        struct device *dev;
+        struct lm3560_platform_data *pdata;
+        struct regmap *regmap;
+        struct mutex lock;
+
+        enum v4l2_flash_led_mode led_mode;
+        struct v4l2_ctrl_handler ctrls_led[LM3560_LED_MAX];
+        struct v4l2_subdev subdev_led[LM3560_LED_MAX];
+};
+
+#define to_lm3560_flash(_ctrl, _no)     \
+        container_of(_ctrl->handler, struct lm3560_flash, ctrls_led[_no])
+
+/* enable mode control */
+static int lm3560_mode_ctrl(struct lm3560_flash *flash)
+{
+        int rval = -EINVAL;
+
+        switch (flash->led_mode) {
+        case V4L2_FLASH_LED_MODE_NONE:
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_ENABLE, 0x03, MODE_SHDN);
+                break;
+        case V4L2_FLASH_LED_MODE_TORCH:
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_ENABLE, 0x03, MODE_TORCH);
+                break;
+        case V4L2_FLASH_LED_MODE_FLASH:
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_ENABLE, 0x03, MODE_FLASH);
+                break;
+        }
+        return rval;
+}
+
+/* led1/2  enable/disable */
+static int lm3560_enable_ctrl(struct lm3560_flash *flash,
+                              enum lm3560_led_id led_no, bool on)
+{
+        int rval;
+
+        if (led_no == LM3560_LED0) {
+                if (on == true)
+                        rval = regmap_update_bits(flash->regmap,
+                                                  REG_ENABLE, 0x08, 0x08);
+                else
+                        rval = regmap_update_bits(flash->regmap,
+                                                  REG_ENABLE, 0x08, 0x00);
+        } else {
+                if (on == true)
+                        rval = regmap_update_bits(flash->regmap,
+                                                  REG_ENABLE, 0x10, 0x10);
+                else
+                        rval = regmap_update_bits(flash->regmap,
+                                                  REG_ENABLE, 0x10, 0x00);
+        }
+        return rval;
+}
+
+/* torch1/2 brightness control */
+static int lm3560_torch_brt_ctrl(struct lm3560_flash *flash,
+                                 enum lm3560_led_id led_no, unsigned int brt)
+{
+        int rval;
+        u8 br_bits;
+
+        if (brt < LM3560_TORCH_BRT_MIN)
+                return lm3560_enable_ctrl(flash, led_no, false);
+        else
+                rval = lm3560_enable_ctrl(flash, led_no, true);
+
+        br_bits = LM3560_TORCH_BRT_uA_TO_REG(brt);
+        if (led_no == LM3560_LED0)
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_TORCH_BR, 0x07, br_bits);
+        else
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_TORCH_BR, 0x38, br_bits << 3);
+
+        return rval;
+}
+
+/* flash1/2 brightness control */
+static int lm3560_flash_brt_ctrl(struct lm3560_flash *flash,
+                                 enum lm3560_led_id led_no, unsigned int brt)
+{
+        int rval;
+        u8 br_bits;
+
+        if (brt < LM3560_FLASH_BRT_MIN)
+                return lm3560_enable_ctrl(flash, led_no, false);
+        else
+                rval = lm3560_enable_ctrl(flash, led_no, true);
+
+        br_bits = LM3560_FLASH_BRT_uA_TO_REG(brt);
+        if (led_no == LM3560_LED0)
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_FLASH_BR, 0x0f, br_bits);
+        else
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_FLASH_BR, 0xf0, br_bits << 4);
+
+        return rval;
+}
+
+/* V4L2 controls  */
+static int lm3560_get_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
+{
+        struct lm3560_flash *flash = to_lm3560_flash(ctrl, led_no);
+
+        mutex_lock(&flash->lock);
+
+        if (ctrl->id == V4L2_CID_FLASH_FAULT) {
+                int rval;
+                s32 fault = 0;
+                unsigned int reg_val;
+                rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
+                if (rval < 0)
+                        return rval;
+                if (rval & FAULT_SHORT_CIRCUIT)
+                        fault |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
+                if (rval & FAULT_OVERTEMP)
+                        fault |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
+                if (rval & FAULT_TIMEOUT)
+                        fault |= V4L2_FLASH_FAULT_TIMEOUT;
+                ctrl->cur.val = fault;
+                return 0;
+        }
+
+        mutex_unlock(&flash->lock);
+        return -EINVAL;
+}
+
+static int lm3560_set_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
+{
+        struct lm3560_flash *flash = to_lm3560_flash(ctrl, led_no);
+        u8 tout_bits;
+        int rval = -EINVAL;
+
+        mutex_lock(&flash->lock);
+
+        switch (ctrl->id) {
+        case V4L2_CID_FLASH_LED_MODE:
+                flash->led_mode = ctrl->val;
+                if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
+                        rval = lm3560_mode_ctrl(flash);
+                break;
+
+        case V4L2_CID_FLASH_STROBE_SOURCE:
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_CONFIG1, 0x04, (ctrl->val) << 2);
+                if (rval < 0)
+                        goto err_out;
+                break;
+
+        case V4L2_CID_FLASH_STROBE:
+                if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
+                        return -EBUSY;
+                flash->led_mode = V4L2_FLASH_LED_MODE_FLASH;
+                rval = lm3560_mode_ctrl(flash);
+                break;
+
+        case V4L2_CID_FLASH_STROBE_STOP:
+                if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
+                        return -EBUSY;
+                flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
+                rval = lm3560_mode_ctrl(flash);
+                break;
+
+        case V4L2_CID_FLASH_TIMEOUT:
+                tout_bits = LM3560_FLASH_TOUT_ms_TO_REG(ctrl->val);
+                rval = regmap_update_bits(flash->regmap,
+                                          REG_FLASH_TOUT, 0x1f, tout_bits);
+                break;
+
+        case V4L2_CID_FLASH_INTENSITY:
+                rval = lm3560_flash_brt_ctrl(flash, led_no, ctrl->val);
+                break;
+
+        case V4L2_CID_FLASH_TORCH_INTENSITY:
+                rval = lm3560_torch_brt_ctrl(flash, led_no, ctrl->val);
+                break;
+        }
+
+        mutex_unlock(&flash->lock);
+err_out:
+        return rval;
+}
+
+static int lm3560_led1_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+        return lm3560_get_ctrl(ctrl, LM3560_LED1);
+}
+
+static int lm3560_led1_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+        return lm3560_set_ctrl(ctrl, LM3560_LED1);
+}
+
+static int lm3560_led0_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+        return lm3560_get_ctrl(ctrl, LM3560_LED0);
+}
+
+static int lm3560_led0_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+        return lm3560_set_ctrl(ctrl, LM3560_LED0);
+}
+
+static const struct v4l2_ctrl_ops lm3560_led_ctrl_ops[LM3560_LED_MAX] = {
+        [LM3560_LED0] = {
+                         .g_volatile_ctrl = lm3560_led0_get_ctrl,
+                         .s_ctrl = lm3560_led0_set_ctrl,
+                         },
+        [LM3560_LED1] = {
+                         .g_volatile_ctrl = lm3560_led1_get_ctrl,
+                         .s_ctrl = lm3560_led1_set_ctrl,
+                         }
+};
+
+static int lm3560_init_controls(struct lm3560_flash *flash,
+                                enum lm3560_led_id led_no)
+{
+        struct v4l2_ctrl *fault;
+        u32 max_flash_brt = flash->pdata->max_flash_brt[led_no];
+        u32 max_torch_brt = flash->pdata->max_torch_brt[led_no];
+        struct v4l2_ctrl_handler *hdl = &flash->ctrls_led[led_no];
+        const struct v4l2_ctrl_ops *ops = &lm3560_led_ctrl_ops[led_no];
+
+        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->led_mode = 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,
+                          LM3560_FLASH_TOUT_MIN,
+                          flash->pdata->max_flash_timeout,
+                          LM3560_FLASH_TOUT_STEP,
+                          flash->pdata->max_flash_timeout);
+
+        /* flash brt */
+        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY,
+                          LM3560_FLASH_BRT_MIN, max_flash_brt,
+                          LM3560_FLASH_BRT_STEP, max_flash_brt);
+
+        /* torch brt */
+        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY,
+                          LM3560_TORCH_BRT_MIN, max_torch_brt,
+                          LM3560_TORCH_BRT_STEP, max_torch_brt);
+
+        /* 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[led_no].ctrl_handler = hdl;
+        return 0;
+}
+
+/* initialize device */
+static const struct v4l2_subdev_ops lm3560_ops = {
+        .core = NULL,
+};
+
+static const struct regmap_config lm3560_regmap = {
+        .reg_bits = 8,
+        .val_bits = 8,
+        .max_register = 0xFF,
+};
+
+static int lm3560_subdev_init(struct lm3560_flash *flash,
+                              enum lm3560_led_id led_no, char *led_name)
+{
+        struct i2c_client *client = to_i2c_client(flash->dev);
+        int rval;
+
+        v4l2_i2c_subdev_init(&flash->subdev_led[led_no], client, &lm3560_ops);
+        flash->subdev_led[led_no].flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+        strcpy(flash->subdev_led[led_no].name, led_name);
+        rval = lm3560_init_controls(flash, led_no);
+        if (rval)
+                goto err_out;
+        rval = media_entity_init(&flash->subdev_led[led_no].entity, 0, NULL, 0);
+        if (rval < 0)
+                goto err_out;
+        flash->subdev_led[led_no].entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
+
+        return rval;
+
+err_out:
+        v4l2_ctrl_handler_free(&flash->ctrls_led[led_no]);
+        return rval;
+}
+
+static int lm3560_init_device(struct lm3560_flash *flash)
+{
+        int rval;
+        unsigned int reg_val;
+
+        /* set peak current */
+        rval = regmap_update_bits(flash->regmap,
+                                  REG_FLASH_TOUT, 0x60, flash->pdata->peak);
+        if (rval < 0)
+                return rval;
+        /* output disable */
+        flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
+        rval = lm3560_mode_ctrl(flash);
+        if (rval < 0)
+                return rval;
+        /* Reset faults */
+        rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
+        return rval;
+}
+
+static int lm3560_probe(struct i2c_client *client,
+                        const struct i2c_device_id *devid)
+{
+        struct lm3560_flash *flash;
+        struct lm3560_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, &lm3560_regmap);
+        if (IS_ERR(flash->regmap)) {
+                rval = PTR_ERR(flash->regmap);
+                return rval;
+        }
+
+        /* if there is no platform data, use chip default value */
+        if (pdata == NULL) {
+                pdata =
+                    kzalloc(sizeof(struct lm3560_platform_data), GFP_KERNEL);
+                if (pdata == NULL)
+                        return -ENODEV;
+                pdata->peak = LM3560_PEAK_3600mA;
+                pdata->max_flash_timeout = LM3560_FLASH_TOUT_MAX;
+                /* led 1 */
+                pdata->max_flash_brt[LM3560_LED0] = LM3560_FLASH_BRT_MAX;
+                pdata->max_torch_brt[LM3560_LED0] = LM3560_TORCH_BRT_MAX;
+                /* led 2 */
+                pdata->max_flash_brt[LM3560_LED1] = LM3560_FLASH_BRT_MAX;
+                pdata->max_torch_brt[LM3560_LED1] = LM3560_TORCH_BRT_MAX;
+        }
+        flash->pdata = pdata;
+        flash->dev = &client->dev;
+        mutex_init(&flash->lock);
+
+        rval = lm3560_subdev_init(flash, LM3560_LED0, "lm3560-led0");
+        if (rval < 0)
+                return rval;
+
+        rval = lm3560_subdev_init(flash, LM3560_LED1, "lm3560-led1");
+        if (rval < 0)
+                return rval;
+
+        rval = lm3560_init_device(flash);
+        if (rval < 0)
+                return rval;
+
+        return 0;
+}
+
+static int lm3560_remove(struct i2c_client *client)
+{
+        struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+        struct lm3560_flash *flash = container_of(subdev, struct lm3560_flash,
+                                                  subdev_led[LM3560_LED_MAX]);
+        unsigned int i;
+
+        for (i = LM3560_LED0; i < LM3560_LED_MAX; i++) {
+                v4l2_device_unregister_subdev(&flash->subdev_led[i]);
+                v4l2_ctrl_handler_free(&flash->ctrls_led[i]);
+                media_entity_cleanup(&flash->subdev_led[i].entity);
+        }
+
+        return 0;
+}
+
+static const struct i2c_device_id lm3560_id_table[] = {
+        {LM3560_NAME, 0},
+        {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm3560_id_table);
+
+static struct i2c_driver lm3560_i2c_driver = {
+        .driver = {
+                   .name = LM3560_NAME,
+                   .pm = NULL,
+                   },
+        .probe = lm3560_probe,
+        .remove = lm3560_remove,
+        .id_table = lm3560_id_table,
+};
+
+module_i2c_driver(lm3560_i2c_driver);
+
+MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
+MODULE_AUTHOR("Ldd Mlp <ldd-mlp@list.ti.com>");
+MODULE_DESCRIPTION("Texas Instruments LM3560 LED flash driver");
+MODULE_LICENSE("GPL");