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Date: Tue, 16 Jun 2009 01:14:29 -0300
From: Mauro Carvalho Chehab <mchehab@...radead.org>
To: Richard Röjfors
<richard.rojfors.ext@...ean-labs.com>
Cc: linux-media@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RESEND][PATCH] video: Initial support for ADV7180
Em Mon, 15 Jun 2009 17:13:28 +0200
Richard Röjfors <richard.rojfors.ext@...ean-labs.com> escreveu:
> This is an initial driver for Analog Devices ADV7180 Video Decoder.
>
> So far it only supports query standard.
Hmm... it seems too preliminar for merging. Also, as this is an i2c ancillary
driver, it would be interesting if you could send it together with the bridge
or platform driver that uses it.
Cheers,
Mauro.
>
> Signed-off-by: Richard Röjfors <richard.rojfors.ext@...ean-labs.com>
> ---
> Index: linux-2.6.30-rc7/drivers/media/video/adv7180.c
> ===================================================================
> --- linux-2.6.30-rc7/drivers/media/video/adv7180.c (revision 0)
> +++ linux-2.6.30-rc7/drivers/media/video/adv7180.c (revision 867)
> @@ -0,0 +1,221 @@
> +/*
> + * 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/i2c-id.h>
> +#include <media/v4l2-ioctl.h>
> +#include <linux/videodev2.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-chip-ident.h>
> +#include <media/v4l2-i2c-drv.h>
> +
> +
> +#define ADV7180_INPUT_CONTROL_REG 0x00
> +#define ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM 0x00
> +#define ADV7180_AUTODETECT_ENABLE_REG 0x07
> +#define ADV7180_AUTODETECT_DEFAULT 0x7f
> +
> +
> +#define ADV7180_STATUS1_REG 0x10
> +#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
> +
> +
> +static unsigned short normal_i2c[] = { 0x42 >> 1, I2C_CLIENT_END };
> +
> +I2C_CLIENT_INSMOD;
> +
> +struct adv7180_state {
> + struct v4l2_subdev sd;
> +};
> +
> +static v4l2_std_id determine_norm(struct i2c_client *client)
> +{
> + u8 status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);
> +
> + switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
> + case ADV7180_STATUS1_AUTOD_NTSM_M_J:
> + return V4L2_STD_NTSC_M_JP;
> + 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 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 i2c_client *client = v4l2_get_subdevdata(sd);
> +
> + *(v4l2_std_id *)std = determine_norm(client);
> + return 0;
> +}
> +
> +static int adv7180_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
> +{
> + return -EINVAL;
> +}
> +
> +static int adv7180_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
> +{
> + return -EINVAL;
> +}
> +
> +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_log_status(struct v4l2_subdev *sd)
> +{
> + v4l2_info(sd, "Normal operation\n");
> + return 0;
> +}
> +
> +static irqreturn_t adv7180_irq(int irq, void *devid)
> +{
> + return IRQ_NONE;
> +}
> +
> +static const struct v4l2_subdev_video_ops adv7180_video_ops = {
> + .querystd = adv7180_querystd,
> +};
> +
> +static const struct v4l2_subdev_core_ops adv7180_core_ops = {
> + .log_status = adv7180_log_status,
> + .g_chip_ident = adv7180_g_chip_ident,
> + .g_ctrl = adv7180_g_ctrl,
> + .s_ctrl = adv7180_s_ctrl,
> +};
> +
> +static const struct v4l2_subdev_ops adv7180_ops = {
> + .core = &adv7180_core_ops,
> + .video = &adv7180_video_ops,
> +};
> +
> +/*
> + * Generic i2c probe
> + * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
> + */
> +
> +static int adv7180_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct adv7180_state *state;
> + struct v4l2_subdev *sd;
> +
> + /* 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 = kmalloc(sizeof(struct adv7180_state), GFP_KERNEL);
> + if (state == NULL)
> + return -ENOMEM;
> + sd = &state->sd;
> + v4l2_i2c_subdev_init(sd, client, &adv7180_ops);
> +
> + /* Initialize adv7180 */
> +
> + /* register interrupt, can be used later */
> + if (client->irq > 0) {
> + /* we can use IRQ */
> + int err = request_irq(client->irq, adv7180_irq, IRQF_SHARED,
> + "adv7180", sd);
> + if (err) {
> + printk(KERN_ERR "adv7180: Failed to request IRQ\n");
> + v4l2_device_unregister_subdev(sd);
> + kfree(state);
> + return err;
> + }
> + }
> +
> + /* enable autodetection */
> + i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
> + ADV7180_INPUT_CONTROL_PAL_BG_NTSC_J_SECAM);
> + i2c_smbus_write_byte_data(client, ADV7180_AUTODETECT_ENABLE_REG,
> + ADV7180_AUTODETECT_DEFAULT);
> + return 0;
> +}
> +
> +static int adv7180_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +
> + if (client->irq > 0)
> + free_irq(client->irq, sd);
> +
> + v4l2_device_unregister_subdev(sd);
> + kfree(to_state(sd));
> + return 0;
> +}
> +
> +static const struct i2c_device_id adv7180_id[] = {
> + { "adv7180", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, adv7180_id);
> +
> +static struct v4l2_i2c_driver_data v4l2_i2c_data = {
> + .name = "adv7180",
> + .probe = adv7180_probe,
> + .remove = adv7180_remove,
> + .id_table = adv7180_id,
> +};
> +
> +MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
> +MODULE_AUTHOR("Mocean Laboratories");
> +MODULE_LICENSE("GPL v2");
> +
> Index: linux-2.6.30-rc7/drivers/media/video/Kconfig
> ===================================================================
> --- linux-2.6.30-rc7/drivers/media/video/Kconfig (revision 861)
> +++ linux-2.6.30-rc7/drivers/media/video/Kconfig (working copy)
> @@ -265,6 +265,15 @@
>
> comment "Video decoders"
>
> +config VIDEO_ADV7180
> + tristate "Analog Devices ADV7180 decoder"
> + depends on VIDEO_V4L2 && I2C
> + ---help---
> + Support for the Analog Devices ADV7180 video decoder.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called adv7180.
> +
> config VIDEO_BT819
> tristate "BT819A VideoStream decoder"
> depends on VIDEO_V4L2 && I2C
> Index: linux-2.6.30-rc7/drivers/media/video/Makefile
> ===================================================================
> --- linux-2.6.30-rc7/drivers/media/video/Makefile (revision 861)
> +++ linux-2.6.30-rc7/drivers/media/video/Makefile (working copy)
> @@ -49,6 +49,7 @@
> obj-$(CONFIG_VIDEO_SAA7191) += saa7191.o
> obj-$(CONFIG_VIDEO_ADV7170) += adv7170.o
> obj-$(CONFIG_VIDEO_ADV7175) += adv7175.o
> +obj-$(CONFIG_VIDEO_ADV7180) += adv7180.o
> obj-$(CONFIG_VIDEO_VPX3220) += vpx3220.o
> obj-$(CONFIG_VIDEO_BT819) += bt819.o
> obj-$(CONFIG_VIDEO_BT856) += bt856.o
> Index: linux-2.6.30-rc7/include/media/v4l2-chip-ident.h
> ===================================================================
> --- linux-2.6.30-rc7/include/media/v4l2-chip-ident.h (revision 861)
> +++ linux-2.6.30-rc7/include/media/v4l2-chip-ident.h (working copy)
> @@ -131,6 +131,9 @@
> /* module adv7175: just ident 7175 */
> V4L2_IDENT_ADV7175 = 7175,
>
> + /* module adv7180: just ident 7180 */
> + V4L2_IDENT_ADV7180 = 7180,
> +
> /* module saa7185: just ident 7185 */
> V4L2_IDENT_SAA7185 = 7185,
>
> --
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Cheers,
Mauro
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