On Fri, Apr 26, 2013 at 11:22:48AM -0300, Mauro Carvalho Chehab wrote:
> Adds a code that (auto)detects gm7113c clones. The auto-detection
> here is not perfect, as, on contrary to what it would be expected
> by looking into its datasheets some devices would return, instead:
>
> saa7115 0-0025: chip 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 @
> 0x4a is unknown
>
> (found on a device labeled as GM7113C 1145 by Ezequiel Garcia)
>
> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com>
Tested-by: Jon Arne Jørgensen <jona...@jonarne.no>
> ---
> drivers/media/i2c/saa7115.c | 36 ++++++++++++++++++++++++++++++++++++
> include/media/v4l2-chip-ident.h | 2 ++
> 2 files changed, 38 insertions(+)
>
> diff --git a/drivers/media/i2c/saa7115.c b/drivers/media/i2c/saa7115.c
> index 9340e0c..950a536 100644
> --- a/drivers/media/i2c/saa7115.c
> +++ b/drivers/media/i2c/saa7115.c
> @@ -1640,6 +1640,36 @@ static int saa711x_detect_chip(struct i2c_client
> *client,
> }
> }
>
> + /* Check if it is a gm7113c */
> + if (!memcmp(name, "0000", 4)) {
> + chip_id = 0;
> + for (i = 0; i < 4; i++) {
> + chip_id = chip_id << 1;
> + chip_id |= (chip_ver[i] & 0x80) ? 1 : 0;
> + }
> +
> + /*
> + * Note: From the datasheet, only versions 1 and 2
> + * exists. However, tests on a device labeled as:
> + * "GM7113C 1145" returned "10" on all 16 chip
> + * version (reg 0x00) reads. So, we need to also
> + * accept at least verion 0. For now, let's just
> + * assume that a device that returns "0000" for
> + * the lower nibble is a gm7113c.
> + */
> +
> + strlcpy(name, "gm7113c", size);
> +
> + if (!autodetect && strcmp(name, id->name))
> + return -EINVAL;
> +
> + v4l_dbg(1, debug, client,
> + "It seems to be a %s chip (%*ph) @ 0x%x.\n",
> + name, 16, chip_ver, client->addr << 1);
> +
> + return V4L2_IDENT_GM7113C;
> + }
> +
> /* Chip was not discovered. Return its ID and don't bind */
> v4l_dbg(1, debug, client, "chip %*ph @ 0x%x is unknown.\n",
> 16, chip_ver, client->addr << 1);
> @@ -1669,6 +1699,11 @@ static int saa711x_probe(struct i2c_client *client,
> if (ident < 0)
> return ident;
>
> + if (ident == V4L2_IDENT_GM7113C) {
> + v4l_warn(client, "%s not yet supported\n", name);
> + return -ENODEV;
> + }
> +
> strlcpy(client->name, name, sizeof(client->name));
>
> state = kzalloc(sizeof(struct saa711x_state), GFP_KERNEL);
> @@ -1756,6 +1791,7 @@ static const struct i2c_device_id saa711x_id[] = {
> { "saa7114", 0 },
> { "saa7115", 0 },
> { "saa7118", 0 },
> + { "gm7113c", 0 },
> { }
> };
> MODULE_DEVICE_TABLE(i2c, saa711x_id);
> diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h
> index c259b36..543f89c 100644
> --- a/include/media/v4l2-chip-ident.h
> +++ b/include/media/v4l2-chip-ident.h
> @@ -52,6 +52,8 @@ enum {
> V4L2_IDENT_SAA7115 = 105,
> V4L2_IDENT_SAA7118 = 108,
>
> + V4L2_IDENT_GM7113C = 140,
> +
> /* module saa7127: reserved range 150-199 */
> V4L2_IDENT_SAA7127 = 157,
> V4L2_IDENT_SAA7129 = 159,
> --
> 1.8.1.4
>
> --
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