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linux/drivers/media/video/adv7180.c

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/*
* adv7180.c Analog Devices ADV7180 video decoder driver
* Copyright (c) 2009 Intel Corporation
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <media/v4l2-ioctl.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <linux/mutex.h>
#define DRIVER_NAME "adv7180"
#define ADV7180_INPUT_CONTROL_REG 0x00
#define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM 0x00
#define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM_PED 0x10
#define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_J_SECAM 0x20
#define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_M_SECAM 0x30
#define ADV7180_INPUT_CONTROL_NTSC_J 0x40
#define ADV7180_INPUT_CONTROL_NTSC_M 0x50
#define ADV7180_INPUT_CONTROL_PAL60 0x60
#define ADV7180_INPUT_CONTROL_NTSC_443 0x70
#define ADV7180_INPUT_CONTROL_PAL_BG 0x80
#define ADV7180_INPUT_CONTROL_PAL_N 0x90
#define ADV7180_INPUT_CONTROL_PAL_M 0xa0
#define ADV7180_INPUT_CONTROL_PAL_M_PED 0xb0
#define ADV7180_INPUT_CONTROL_PAL_COMB_N 0xc0
#define ADV7180_INPUT_CONTROL_PAL_COMB_N_PED 0xd0
#define ADV7180_INPUT_CONTROL_PAL_SECAM 0xe0
#define ADV7180_INPUT_CONTROL_PAL_SECAM_PED 0xf0
#define ADV7180_EXTENDED_OUTPUT_CONTROL_REG 0x04
#define ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS 0xC5
#define ADV7180_AUTODETECT_ENABLE_REG 0x07
#define ADV7180_AUTODETECT_DEFAULT 0x7f
#define ADV7180_ADI_CTRL_REG 0x0e
#define ADV7180_ADI_CTRL_IRQ_SPACE 0x20
#define ADV7180_STATUS1_REG 0x10
#define ADV7180_STATUS1_IN_LOCK 0x01
#define ADV7180_STATUS1_AUTOD_MASK 0x70
#define ADV7180_STATUS1_AUTOD_NTSM_M_J 0x00
#define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10
#define ADV7180_STATUS1_AUTOD_PAL_M 0x20
#define ADV7180_STATUS1_AUTOD_PAL_60 0x30
#define ADV7180_STATUS1_AUTOD_PAL_B_G 0x40
#define ADV7180_STATUS1_AUTOD_SECAM 0x50
#define ADV7180_STATUS1_AUTOD_PAL_COMB 0x60
#define ADV7180_STATUS1_AUTOD_SECAM_525 0x70
#define ADV7180_IDENT_REG 0x11
#define ADV7180_ID_7180 0x18
#define ADV7180_ICONF1_ADI 0x40
#define ADV7180_ICONF1_ACTIVE_LOW 0x01
#define ADV7180_ICONF1_PSYNC_ONLY 0x10
#define ADV7180_ICONF1_ACTIVE_TO_CLR 0xC0
#define ADV7180_IRQ1_LOCK 0x01
#define ADV7180_IRQ1_UNLOCK 0x02
#define ADV7180_ISR1_ADI 0x42
#define ADV7180_ICR1_ADI 0x43
#define ADV7180_IMR1_ADI 0x44
#define ADV7180_IMR2_ADI 0x48
#define ADV7180_IRQ3_AD_CHANGE 0x08
#define ADV7180_ISR3_ADI 0x4A
#define ADV7180_ICR3_ADI 0x4B
#define ADV7180_IMR3_ADI 0x4C
#define ADV7180_IMR4_ADI 0x50
struct adv7180_state {
struct v4l2_subdev sd;
struct work_struct work;
struct mutex mutex; /* mutual excl. when accessing chip */
int irq;
v4l2_std_id curr_norm;
bool autodetect;
};
static v4l2_std_id adv7180_std_to_v4l2(u8 status1)
{
switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
case ADV7180_STATUS1_AUTOD_NTSM_M_J:
return V4L2_STD_NTSC;
case ADV7180_STATUS1_AUTOD_NTSC_4_43:
return V4L2_STD_NTSC_443;
case ADV7180_STATUS1_AUTOD_PAL_M:
return V4L2_STD_PAL_M;
case ADV7180_STATUS1_AUTOD_PAL_60:
return V4L2_STD_PAL_60;
case ADV7180_STATUS1_AUTOD_PAL_B_G:
return V4L2_STD_PAL;
case ADV7180_STATUS1_AUTOD_SECAM:
return V4L2_STD_SECAM;
case ADV7180_STATUS1_AUTOD_PAL_COMB:
return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
case ADV7180_STATUS1_AUTOD_SECAM_525:
return V4L2_STD_SECAM;
default:
return V4L2_STD_UNKNOWN;
}
}
static int v4l2_std_to_adv7180(v4l2_std_id std)
{
if (std == V4L2_STD_PAL_60)
return ADV7180_INPUT_CONTROL_PAL60;
if (std == V4L2_STD_NTSC_443)
return ADV7180_INPUT_CONTROL_NTSC_443;
if (std == V4L2_STD_PAL_N)
return ADV7180_INPUT_CONTROL_PAL_N;
if (std == V4L2_STD_PAL_M)
return ADV7180_INPUT_CONTROL_PAL_M;
if (std == V4L2_STD_PAL_Nc)
return ADV7180_INPUT_CONTROL_PAL_COMB_N;
if (std & V4L2_STD_PAL)
return ADV7180_INPUT_CONTROL_PAL_BG;
if (std & V4L2_STD_NTSC)
return ADV7180_INPUT_CONTROL_NTSC_M;
if (std & V4L2_STD_SECAM)
return ADV7180_INPUT_CONTROL_PAL_SECAM;
return -EINVAL;
}
static u32 adv7180_status_to_v4l2(u8 status1)
{
if (!(status1 & ADV7180_STATUS1_IN_LOCK))
return V4L2_IN_ST_NO_SIGNAL;
return 0;
}
static int __adv7180_status(struct i2c_client *client, u32 *status,
v4l2_std_id *std)
{
int status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);
if (status1 < 0)
return status1;
if (status)
*status = adv7180_status_to_v4l2(status1);
if (std)
*std = adv7180_std_to_v4l2(status1);
return 0;
}
static inline struct adv7180_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct adv7180_state, sd);
}
static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
struct adv7180_state *state = to_state(sd);
int err = mutex_lock_interruptible(&state->mutex);
if (err)
return err;
/* when we are interrupt driven we know the state */
if (!state->autodetect || state->irq > 0)
*std = state->curr_norm;
else
err = __adv7180_status(v4l2_get_subdevdata(sd), NULL, std);
mutex_unlock(&state->mutex);
return err;
}
static int adv7180_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
struct adv7180_state *state = to_state(sd);
int ret = mutex_lock_interruptible(&state->mutex);
if (ret)
return ret;
ret = __adv7180_status(v4l2_get_subdevdata(sd), status, NULL);
mutex_unlock(&state->mutex);
return ret;
}
static int adv7180_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_ADV7180, 0);
}
static int adv7180_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct adv7180_state *state = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = mutex_lock_interruptible(&state->mutex);
if (ret)
return ret;
/* all standards -> autodetect */
if (std == V4L2_STD_ALL) {
ret = i2c_smbus_write_byte_data(client,
ADV7180_INPUT_CONTROL_REG,
ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM);
if (ret < 0)
goto out;
__adv7180_status(client, NULL, &state->curr_norm);
state->autodetect = true;
} else {
ret = v4l2_std_to_adv7180(std);
if (ret < 0)
goto out;
ret = i2c_smbus_write_byte_data(client,
ADV7180_INPUT_CONTROL_REG, ret);
if (ret < 0)
goto out;
state->curr_norm = std;
state->autodetect = false;
}
ret = 0;
out:
mutex_unlock(&state->mutex);
return ret;
}
static const struct v4l2_subdev_video_ops adv7180_video_ops = {
.querystd = adv7180_querystd,
.g_input_status = adv7180_g_input_status,
};
static const struct v4l2_subdev_core_ops adv7180_core_ops = {
.g_chip_ident = adv7180_g_chip_ident,
.s_std = adv7180_s_std,
};
static const struct v4l2_subdev_ops adv7180_ops = {
.core = &adv7180_core_ops,
.video = &adv7180_video_ops,
};
static void adv7180_work(struct work_struct *work)
{
struct adv7180_state *state = container_of(work, struct adv7180_state,
work);
struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
u8 isr3;
mutex_lock(&state->mutex);
i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
ADV7180_ADI_CTRL_IRQ_SPACE);
isr3 = i2c_smbus_read_byte_data(client, ADV7180_ISR3_ADI);
/* clear */
i2c_smbus_write_byte_data(client, ADV7180_ICR3_ADI, isr3);
i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, 0);
if (isr3 & ADV7180_IRQ3_AD_CHANGE && state->autodetect)
__adv7180_status(client, NULL, &state->curr_norm);
mutex_unlock(&state->mutex);
enable_irq(state->irq);
}
static irqreturn_t adv7180_irq(int irq, void *devid)
{
struct adv7180_state *state = devid;
schedule_work(&state->work);
disable_irq_nosync(state->irq);
return IRQ_HANDLED;
}
/*
* Generic i2c probe
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
static __devinit int adv7180_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct adv7180_state *state;
struct v4l2_subdev *sd;
int ret;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL);
if (state == NULL) {
ret = -ENOMEM;
goto err;
}
state->irq = client->irq;
INIT_WORK(&state->work, adv7180_work);
mutex_init(&state->mutex);
state->autodetect = true;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &adv7180_ops);
/* Initialize adv7180 */
/* Enable autodetection */
ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM);
if (ret < 0)
goto err_unreg_subdev;
ret = i2c_smbus_write_byte_data(client, ADV7180_AUTODETECT_ENABLE_REG,
ADV7180_AUTODETECT_DEFAULT);
if (ret < 0)
goto err_unreg_subdev;
/* ITU-R BT.656-4 compatible */
ret = i2c_smbus_write_byte_data(client,
ADV7180_EXTENDED_OUTPUT_CONTROL_REG,
ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS);
if (ret < 0)
goto err_unreg_subdev;
/* read current norm */
__adv7180_status(client, NULL, &state->curr_norm);
/* register for interrupts */
if (state->irq > 0) {
ret = request_irq(state->irq, adv7180_irq, 0, DRIVER_NAME,
state);
if (ret)
goto err_unreg_subdev;
ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
ADV7180_ADI_CTRL_IRQ_SPACE);
if (ret < 0)
goto err_unreg_subdev;
/* config the Interrupt pin to be active low */
ret = i2c_smbus_write_byte_data(client, ADV7180_ICONF1_ADI,
ADV7180_ICONF1_ACTIVE_LOW | ADV7180_ICONF1_PSYNC_ONLY);
if (ret < 0)
goto err_unreg_subdev;
ret = i2c_smbus_write_byte_data(client, ADV7180_IMR1_ADI, 0);
if (ret < 0)
goto err_unreg_subdev;
ret = i2c_smbus_write_byte_data(client, ADV7180_IMR2_ADI, 0);
if (ret < 0)
goto err_unreg_subdev;
/* enable AD change interrupts interrupts */
ret = i2c_smbus_write_byte_data(client, ADV7180_IMR3_ADI,
ADV7180_IRQ3_AD_CHANGE);
if (ret < 0)
goto err_unreg_subdev;
ret = i2c_smbus_write_byte_data(client, ADV7180_IMR4_ADI, 0);
if (ret < 0)
goto err_unreg_subdev;
ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
0);
if (ret < 0)
goto err_unreg_subdev;
}
return 0;
err_unreg_subdev:
mutex_destroy(&state->mutex);
v4l2_device_unregister_subdev(sd);
kfree(state);
err:
printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", ret);
return ret;
}
static __devexit int adv7180_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct adv7180_state *state = to_state(sd);
if (state->irq > 0) {
free_irq(client->irq, state);
if (cancel_work_sync(&state->work)) {
/*
* Work was pending, therefore we need to enable
* IRQ here to balance the disable_irq() done in the
* interrupt handler.
*/
enable_irq(state->irq);
}
}
mutex_destroy(&state->mutex);
v4l2_device_unregister_subdev(sd);
kfree(to_state(sd));
return 0;
}
static const struct i2c_device_id adv7180_id[] = {
{DRIVER_NAME, 0},
{},
};
MODULE_DEVICE_TABLE(i2c, adv7180_id);
static struct i2c_driver adv7180_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
},
.probe = adv7180_probe,
.remove = __devexit_p(adv7180_remove),
.id_table = adv7180_id,
};
static __init int adv7180_init(void)
{
return i2c_add_driver(&adv7180_driver);
}
static __exit void adv7180_exit(void)
{
i2c_del_driver(&adv7180_driver);
}
module_init(adv7180_init);
module_exit(adv7180_exit);
MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
MODULE_AUTHOR("Mocean Laboratories");
MODULE_LICENSE("GPL v2");
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