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linux/drivers/media/i2c/adv7393.c
Laurent Pinchart c02b211df6 [media] media: i2c: Convert to devm_kzalloc() 
Using the managed function the kfree() calls can be removed from the
probe error path and the remove handler.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-05-21 07:52:15 -03:00

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/*
* adv7393 - ADV7393 Video Encoder Driver
*
* The encoder hardware does not support SECAM.
*
* Copyright (C) 2010-2012 ADVANSEE - http://www.advansee.com/
* Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
*
* Based on ADV7343 driver,
*
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed .as is. WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/videodev2.h>
#include <linux/uaccess.h>
#include <media/adv7393.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>
#include "adv7393_regs.h"
MODULE_DESCRIPTION("ADV7393 video encoder driver");
MODULE_LICENSE("GPL");
static bool debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debug level 0-1");
struct adv7393_state {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
u8 reg00;
u8 reg01;
u8 reg02;
u8 reg35;
u8 reg80;
u8 reg82;
u32 output;
v4l2_std_id std;
};
static inline struct adv7393_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct adv7393_state, sd);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct adv7393_state, hdl)->sd;
}
static inline int adv7393_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_write_byte_data(client, reg, value);
}
static const u8 adv7393_init_reg_val[] = {
ADV7393_SOFT_RESET, ADV7393_SOFT_RESET_DEFAULT,
ADV7393_POWER_MODE_REG, ADV7393_POWER_MODE_REG_DEFAULT,
ADV7393_HD_MODE_REG1, ADV7393_HD_MODE_REG1_DEFAULT,
ADV7393_HD_MODE_REG2, ADV7393_HD_MODE_REG2_DEFAULT,
ADV7393_HD_MODE_REG3, ADV7393_HD_MODE_REG3_DEFAULT,
ADV7393_HD_MODE_REG4, ADV7393_HD_MODE_REG4_DEFAULT,
ADV7393_HD_MODE_REG5, ADV7393_HD_MODE_REG5_DEFAULT,
ADV7393_HD_MODE_REG6, ADV7393_HD_MODE_REG6_DEFAULT,
ADV7393_HD_MODE_REG7, ADV7393_HD_MODE_REG7_DEFAULT,
ADV7393_SD_MODE_REG1, ADV7393_SD_MODE_REG1_DEFAULT,
ADV7393_SD_MODE_REG2, ADV7393_SD_MODE_REG2_DEFAULT,
ADV7393_SD_MODE_REG3, ADV7393_SD_MODE_REG3_DEFAULT,
ADV7393_SD_MODE_REG4, ADV7393_SD_MODE_REG4_DEFAULT,
ADV7393_SD_MODE_REG5, ADV7393_SD_MODE_REG5_DEFAULT,
ADV7393_SD_MODE_REG6, ADV7393_SD_MODE_REG6_DEFAULT,
ADV7393_SD_MODE_REG7, ADV7393_SD_MODE_REG7_DEFAULT,
ADV7393_SD_MODE_REG8, ADV7393_SD_MODE_REG8_DEFAULT,
ADV7393_SD_TIMING_REG0, ADV7393_SD_TIMING_REG0_DEFAULT,
ADV7393_SD_HUE_ADJUST, ADV7393_SD_HUE_ADJUST_DEFAULT,
ADV7393_SD_CGMS_WSS0, ADV7393_SD_CGMS_WSS0_DEFAULT,
ADV7393_SD_BRIGHTNESS_WSS, ADV7393_SD_BRIGHTNESS_WSS_DEFAULT,
};
/*
* 2^32
* FSC(reg) = FSC (HZ) * --------
* 27000000
*/
static const struct adv7393_std_info stdinfo[] = {
{
/* FSC(Hz) = 4,433,618.75 Hz */
SD_STD_NTSC, 705268427, V4L2_STD_NTSC_443,
}, {
/* FSC(Hz) = 3,579,545.45 Hz */
SD_STD_NTSC, 569408542, V4L2_STD_NTSC,
}, {
/* FSC(Hz) = 3,575,611.00 Hz */
SD_STD_PAL_M, 568782678, V4L2_STD_PAL_M,
}, {
/* FSC(Hz) = 3,582,056.00 Hz */
SD_STD_PAL_N, 569807903, V4L2_STD_PAL_Nc,
}, {
/* FSC(Hz) = 4,433,618.75 Hz */
SD_STD_PAL_N, 705268427, V4L2_STD_PAL_N,
}, {
/* FSC(Hz) = 4,433,618.75 Hz */
SD_STD_PAL_M, 705268427, V4L2_STD_PAL_60,
}, {
/* FSC(Hz) = 4,433,618.75 Hz */
SD_STD_PAL_BDGHI, 705268427, V4L2_STD_PAL,
},
};
static int adv7393_setstd(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct adv7393_state *state = to_state(sd);
const struct adv7393_std_info *std_info;
int num_std;
u8 reg;
u32 val;
int err = 0;
int i;
num_std = ARRAY_SIZE(stdinfo);
for (i = 0; i < num_std; i++) {
if (stdinfo[i].stdid & std)
break;
}
if (i == num_std) {
v4l2_dbg(1, debug, sd,
"Invalid std or std is not supported: %llx\n",
(unsigned long long)std);
return -EINVAL;
}
std_info = &stdinfo[i];
/* Set the standard */
val = state->reg80 & ~SD_STD_MASK;
val |= std_info->standard_val3;
err = adv7393_write(sd, ADV7393_SD_MODE_REG1, val);
if (err < 0)
goto setstd_exit;
state->reg80 = val;
/* Configure the input mode register */
val = state->reg01 & ~INPUT_MODE_MASK;
val |= SD_INPUT_MODE;
err = adv7393_write(sd, ADV7393_MODE_SELECT_REG, val);
if (err < 0)
goto setstd_exit;
state->reg01 = val;
/* Program the sub carrier frequency registers */
val = std_info->fsc_val;
for (reg = ADV7393_FSC_REG0; reg <= ADV7393_FSC_REG3; reg++) {
err = adv7393_write(sd, reg, val);
if (err < 0)
goto setstd_exit;
val >>= 8;
}
val = state->reg82;
/* Pedestal settings */
if (std & (V4L2_STD_NTSC | V4L2_STD_NTSC_443))
val |= SD_PEDESTAL_EN;
else
val &= SD_PEDESTAL_DI;
err = adv7393_write(sd, ADV7393_SD_MODE_REG2, val);
if (err < 0)
goto setstd_exit;
state->reg82 = val;
setstd_exit:
if (err != 0)
v4l2_err(sd, "Error setting std, write failed\n");
return err;
}
static int adv7393_setoutput(struct v4l2_subdev *sd, u32 output_type)
{
struct adv7393_state *state = to_state(sd);
u8 val;
int err = 0;
if (output_type > ADV7393_SVIDEO_ID) {
v4l2_dbg(1, debug, sd,
"Invalid output type or output type not supported:%d\n",
output_type);
return -EINVAL;
}
/* Enable Appropriate DAC */
val = state->reg00 & 0x03;
if (output_type == ADV7393_COMPOSITE_ID)
val |= ADV7393_COMPOSITE_POWER_VALUE;
else if (output_type == ADV7393_COMPONENT_ID)
val |= ADV7393_COMPONENT_POWER_VALUE;
else
val |= ADV7393_SVIDEO_POWER_VALUE;
err = adv7393_write(sd, ADV7393_POWER_MODE_REG, val);
if (err < 0)
goto setoutput_exit;
state->reg00 = val;
/* Enable YUV output */
val = state->reg02 | YUV_OUTPUT_SELECT;
err = adv7393_write(sd, ADV7393_MODE_REG0, val);
if (err < 0)
goto setoutput_exit;
state->reg02 = val;
/* configure SD DAC Output 1 bit */
val = state->reg82;
if (output_type == ADV7393_COMPONENT_ID)
val &= SD_DAC_OUT1_DI;
else
val |= SD_DAC_OUT1_EN;
err = adv7393_write(sd, ADV7393_SD_MODE_REG2, val);
if (err < 0)
goto setoutput_exit;
state->reg82 = val;
/* configure ED/HD Color DAC Swap bit to zero */
val = state->reg35 & HD_DAC_SWAP_DI;
err = adv7393_write(sd, ADV7393_HD_MODE_REG6, val);
if (err < 0)
goto setoutput_exit;
state->reg35 = val;
setoutput_exit:
if (err != 0)
v4l2_err(sd, "Error setting output, write failed\n");
return err;
}
static int adv7393_log_status(struct v4l2_subdev *sd)
{
struct adv7393_state *state = to_state(sd);
v4l2_info(sd, "Standard: %llx\n", (unsigned long long)state->std);
v4l2_info(sd, "Output: %s\n", (state->output == 0) ? "Composite" :
((state->output == 1) ? "Component" : "S-Video"));
return 0;
}
static int adv7393_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
return adv7393_write(sd, ADV7393_SD_BRIGHTNESS_WSS,
ctrl->val & SD_BRIGHTNESS_VALUE_MASK);
case V4L2_CID_HUE:
return adv7393_write(sd, ADV7393_SD_HUE_ADJUST,
ctrl->val - ADV7393_HUE_MIN);
case V4L2_CID_GAIN:
return adv7393_write(sd, ADV7393_DAC123_OUTPUT_LEVEL,
ctrl->val);
}
return -EINVAL;
}
static int adv7393_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *chip)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7393, 0);
}
static const struct v4l2_ctrl_ops adv7393_ctrl_ops = {
.s_ctrl = adv7393_s_ctrl,
};
static const struct v4l2_subdev_core_ops adv7393_core_ops = {
.log_status = adv7393_log_status,
.g_chip_ident = adv7393_g_chip_ident,
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
.g_ctrl = v4l2_subdev_g_ctrl,
.s_ctrl = v4l2_subdev_s_ctrl,
.queryctrl = v4l2_subdev_queryctrl,
.querymenu = v4l2_subdev_querymenu,
};
static int adv7393_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct adv7393_state *state = to_state(sd);
int err = 0;
if (state->std == std)
return 0;
err = adv7393_setstd(sd, std);
if (!err)
state->std = std;
return err;
}
static int adv7393_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct adv7393_state *state = to_state(sd);
int err = 0;
if (state->output == output)
return 0;
err = adv7393_setoutput(sd, output);
if (!err)
state->output = output;
return err;
}
static const struct v4l2_subdev_video_ops adv7393_video_ops = {
.s_std_output = adv7393_s_std_output,
.s_routing = adv7393_s_routing,
};
static const struct v4l2_subdev_ops adv7393_ops = {
.core = &adv7393_core_ops,
.video = &adv7393_video_ops,
};
static int adv7393_initialize(struct v4l2_subdev *sd)
{
struct adv7393_state *state = to_state(sd);
int err = 0;
int i;
for (i = 0; i < ARRAY_SIZE(adv7393_init_reg_val); i += 2) {
err = adv7393_write(sd, adv7393_init_reg_val[i],
adv7393_init_reg_val[i+1]);
if (err) {
v4l2_err(sd, "Error initializing\n");
return err;
}
}
/* Configure for default video standard */
err = adv7393_setoutput(sd, state->output);
if (err < 0) {
v4l2_err(sd, "Error setting output during init\n");
return -EINVAL;
}
err = adv7393_setstd(sd, state->std);
if (err < 0) {
v4l2_err(sd, "Error setting std during init\n");
return -EINVAL;
}
return err;
}
static int adv7393_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct adv7393_state *state;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
state->reg00 = ADV7393_POWER_MODE_REG_DEFAULT;
state->reg01 = 0x00;
state->reg02 = 0x20;
state->reg35 = ADV7393_HD_MODE_REG6_DEFAULT;
state->reg80 = ADV7393_SD_MODE_REG1_DEFAULT;
state->reg82 = ADV7393_SD_MODE_REG2_DEFAULT;
state->output = ADV7393_COMPOSITE_ID;
state->std = V4L2_STD_NTSC;
v4l2_i2c_subdev_init(&state->sd, client, &adv7393_ops);
v4l2_ctrl_handler_init(&state->hdl, 3);
v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
V4L2_CID_BRIGHTNESS, ADV7393_BRIGHTNESS_MIN,
ADV7393_BRIGHTNESS_MAX, 1,
ADV7393_BRIGHTNESS_DEF);
v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
V4L2_CID_HUE, ADV7393_HUE_MIN,
ADV7393_HUE_MAX, 1,
ADV7393_HUE_DEF);
v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
V4L2_CID_GAIN, ADV7393_GAIN_MIN,
ADV7393_GAIN_MAX, 1,
ADV7393_GAIN_DEF);
state->sd.ctrl_handler = &state->hdl;
if (state->hdl.error) {
int err = state->hdl.error;
v4l2_ctrl_handler_free(&state->hdl);
return err;
}
v4l2_ctrl_handler_setup(&state->hdl);
err = adv7393_initialize(&state->sd);
if (err)
v4l2_ctrl_handler_free(&state->hdl);
return err;
}
static int adv7393_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct adv7393_state *state = to_state(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&state->hdl);
return 0;
}
static const struct i2c_device_id adv7393_id[] = {
{"adv7393", 0},
{},
};
MODULE_DEVICE_TABLE(i2c, adv7393_id);
static struct i2c_driver adv7393_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "adv7393",
},
.probe = adv7393_probe,
.remove = adv7393_remove,
.id_table = adv7393_id,
};
module_i2c_driver(adv7393_driver);
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