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Message-Id: <7dfc5692c89a4017591f475341f7178e473f7bb1.1639123045.git.mchehab+huawei@kernel.org>
Date: Fri, 10 Dec 2021 08:59:50 +0100
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: unlisted-recipients:; (no To-header on input)
Cc: linuxarm@...wei.com, mauro.chehab@...wei.com,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
Antti Palosaari <crope@....fi>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH RFC] media: si2157: get rid of chiptype data
The driver should be capable of autodetecting its type, so no
need to pass it via device driver's data.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
This is RFC, as this patch could potentially cause regressions, if some of the
data there would actually be quirks needed by some specific devices.
drivers/media/tuners/si2157.c | 40 +++++++++++++++++-------------
drivers/media/tuners/si2157_priv.h | 7 +-----
2 files changed, 24 insertions(+), 23 deletions(-)
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index bb590395e81a..8c33c412a203 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -185,6 +185,9 @@ static int si2157_find_and_load_firmware(struct dvb_frontend *fe)
return -EINVAL;
}
+ /* Update the part id based on device's report */
+ dev->part_id = part_id;
+
dev_info(&client->dev,
"found a 'Silicon Labs Si21%d-%c%c%c ROM 0x%02x'\n",
part_id, cmd.args[1], cmd.args[3], cmd.args[4], rom_id);
@@ -235,10 +238,10 @@ static int si2157_init(struct dvb_frontend *fe)
dev->if_frequency = 0; /* we no longer know current tuner state */
/* power up */
- if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
+ if (dev->part_id == SI2146) {
memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
cmd.wlen = 9;
- } else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
+ } else if (dev->part_id == SI2141) {
memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
cmd.wlen = 10;
} else {
@@ -247,11 +250,11 @@ static int si2157_init(struct dvb_frontend *fe)
}
cmd.rlen = 1;
ret = si2157_cmd_execute(client, &cmd);
- if (ret && (dev->chiptype != SI2157_CHIPTYPE_SI2141 || ret != -EAGAIN))
+ if (ret && (dev->part_id != SI2141 || ret != -EAGAIN))
goto err;
/* Si2141 needs a second command before it answers the revision query */
- if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
+ if (dev->part_id == SI2141) {
memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
cmd.wlen = 7;
ret = si2157_cmd_execute(client, &cmd);
@@ -493,7 +496,7 @@ static int si2157_set_params(struct dvb_frontend *fe)
if (ret)
goto err;
- if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
+ if (dev->part_id == SI2146)
memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
else
memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
@@ -560,9 +563,9 @@ static int si2157_set_analog_params(struct dvb_frontend *fe,
u8 color = 0; /* 0=NTSC/PAL, 0x10=SECAM */
u8 invert_analog = 1; /* analog tuner spectrum; 0=normal, 1=inverted */
- if (dev->chiptype != SI2157_CHIPTYPE_SI2157) {
- dev_info(&client->dev, "Analog tuning not supported for chiptype=%u\n",
- dev->chiptype);
+ if (dev->part_id != SI2157) {
+ dev_info(&client->dev, "Analog tuning not supported on Si21%d\n",
+ dev->part_id);
ret = -EINVAL;
goto err;
}
@@ -874,7 +877,7 @@ static int si2157_probe(struct i2c_client *client,
dev->inversion = cfg->inversion;
dev->dont_load_firmware = cfg->dont_load_firmware;
dev->if_port = cfg->if_port;
- dev->chiptype = (u8)id->driver_data;
+ dev->part_id = (u8)id->driver_data;
dev->if_frequency = 5000000; /* default value of property 0x0706 */
mutex_init(&dev->i2c_mutex);
INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
@@ -917,10 +920,8 @@ static int si2157_probe(struct i2c_client *client,
}
#endif
- dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
- dev->chiptype == SI2157_CHIPTYPE_SI2141 ? "Si2141" :
- dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
- "Si2146" : "Si2147/2148/2157/2158");
+ dev_info(&client->dev, "Silicon Labs Si21%d successfully attached\n",
+ dev->part_id);
return 0;
@@ -953,11 +954,16 @@ static int si2157_remove(struct i2c_client *client)
return 0;
}
+/*
+ * The part_id used here will only be used on buggy devices that don't
+ * accept firmware uploads. Non-buggy devices should just use "si2157" for
+ * all SiLabs TER tuners, as the driver should auto-detect it.
+ */
static const struct i2c_device_id si2157_id_table[] = {
- {"si2157", SI2157_CHIPTYPE_SI2157},
- {"si2146", SI2157_CHIPTYPE_SI2146},
- {"si2141", SI2157_CHIPTYPE_SI2141},
- {"si2177", SI2157_CHIPTYPE_SI2177},
+ {"si2157", SI2157},
+ {"si2146", SI2146},
+ {"si2141", SI2141},
+ {"si2177", SI2177},
{}
};
MODULE_DEVICE_TABLE(i2c, si2157_id_table);
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
index 0db21b082ba9..df17a5f03561 100644
--- a/drivers/media/tuners/si2157_priv.h
+++ b/drivers/media/tuners/si2157_priv.h
@@ -26,7 +26,7 @@ struct si2157_dev {
unsigned int active:1;
unsigned int inversion:1;
unsigned int dont_load_firmware:1;
- u8 chiptype;
+ u8 part_id;
u8 if_port;
u32 if_frequency;
u32 bandwidth;
@@ -58,11 +58,6 @@ struct si2157_tuner_info {
const char *fw_name, *fw_alt_name;
};
-#define SI2157_CHIPTYPE_SI2157 0
-#define SI2157_CHIPTYPE_SI2146 1
-#define SI2157_CHIPTYPE_SI2141 2
-#define SI2157_CHIPTYPE_SI2177 3
-
/* firmware command struct */
#define SI2157_ARGLEN 30
struct si2157_cmd {
--
2.33.1
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