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 <mchehab@xxxxxxxxxx>
Signed-off-by: Jon Arne Jørgensen <jonarne@xxxxxxxxxx>
Tested-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
---
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 aa92478..eb2c19d 100644
--- a/drivers/media/i2c/saa7115.c
+++ b/drivers/media/i2c/saa7115.c
@@ -1628,6 +1628,36 @@ 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.
+ */
+
+ snprintf(name, size, "gm7113c");
+
+ 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);
@@ -1657,6 +1687,11 @@ 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);
@@ -1744,6 +1779,7 @@ 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 4ee125b..ef7e1c4 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,
--
1.8.2.1
--
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