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[media] si2157: rework firmware download logic a little bit

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Rework firmware selection / chip detection logic a little bit.
Add missing release_firmware() to error path.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Tested-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari 2014-07-13 20:05:28 -03:00 committed by Mauro Carvalho Chehab
parent b6b6fd6feb
commit 7d6bc608e0
1 changed files with 64 additions and 56 deletions
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120
drivers/media/tuners/si2157.c
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@ -82,11 +82,11 @@ err:
static int si2157_init(struct dvb_frontend *fe)
{
struct si2157 *s = fe->tuner_priv;
int ret, remaining;
int ret, len, remaining;
struct si2157_cmd cmd;
u8 chip, len = 0;
const struct firmware *fw = NULL;
u8 *fw_file;
unsigned int chip_id;
dev_dbg(&s->client->dev, "%s:\n", __func__);
@ -106,64 +106,69 @@ static int si2157_init(struct dvb_frontend *fe)
if (ret)
goto err;
chip = cmd.args[2]; /* 57 for Si2157, 58 for Si2158 */
chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
cmd.args[4] << 0;
/* Si2158 requires firmware download */
if (chip == 58) {
if (((cmd.args[1] & 0x0f) == 1) && (cmd.args[3] == '2') &&
(cmd.args[4] == '0'))
fw_file = SI2158_A20_FIRMWARE;
else {
dev_err(&s->client->dev,
"%s: no firmware file for Si%d-%c%c defined\n",
KBUILD_MODNAME, chip, cmd.args[3], cmd.args[4]);
ret = -EINVAL;
goto err;
}
/* cold state - try to download firmware */
dev_info(&s->client->dev, "%s: found a '%s' in cold state\n",
KBUILD_MODNAME, si2157_ops.info.name);
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, &s->client->dev);
if (ret) {
dev_err(&s->client->dev, "%s: firmware file '%s' not found\n",
KBUILD_MODNAME, fw_file);
goto err;
}
dev_info(&s->client->dev, "%s: downloading firmware from file '%s'\n",
KBUILD_MODNAME, fw_file);
/* firmware should be n chunks of 17 bytes */
if (fw->size % 17 != 0) {
dev_err(&s->client->dev, "%s: firmware file '%s' is invalid\n",
KBUILD_MODNAME, fw_file);
ret = -EINVAL;
goto err;
}
for (remaining = fw->size; remaining > 0; remaining -= 17) {
memcpy(&len, &fw->data[fw->size - remaining], 1);
memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1],
len);
cmd.wlen = len;
cmd.rlen = 1;
ret = si2157_cmd_execute(s, &cmd);
if (ret) {
dev_err(&s->client->dev,
"%s: firmware download failed=%d\n",
KBUILD_MODNAME, ret);
goto err;
}
}
release_firmware(fw);
fw = NULL;
#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
switch (chip_id) {
case SI2158_A20:
fw_file = SI2158_A20_FIRMWARE;
break;
case SI2157_A30:
goto skip_fw_download;
break;
default:
dev_err(&s->client->dev,
"%s: unkown chip version Si21%d-%c%c%c\n",
KBUILD_MODNAME, cmd.args[2], cmd.args[1],
cmd.args[3], cmd.args[4]);
ret = -EINVAL;
goto err;
}
/* cold state - try to download firmware */
dev_info(&s->client->dev, "%s: found a '%s' in cold state\n",
KBUILD_MODNAME, si2157_ops.info.name);
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, &s->client->dev);
if (ret) {
dev_err(&s->client->dev, "%s: firmware file '%s' not found\n",
KBUILD_MODNAME, fw_file);
goto err;
}
/* firmware should be n chunks of 17 bytes */
if (fw->size % 17 != 0) {
dev_err(&s->client->dev, "%s: firmware file '%s' is invalid\n",
KBUILD_MODNAME, fw_file);
ret = -EINVAL;
goto err;
}
dev_info(&s->client->dev, "%s: downloading firmware from file '%s'\n",
KBUILD_MODNAME, fw_file);
for (remaining = fw->size; remaining > 0; remaining -= 17) {
len = fw->data[fw->size - remaining];
memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
cmd.wlen = len;
cmd.rlen = 1;
ret = si2157_cmd_execute(s, &cmd);
if (ret) {
dev_err(&s->client->dev,
"%s: firmware download failed=%d\n",
KBUILD_MODNAME, ret);
goto err;
}
}
release_firmware(fw);
fw = NULL;
skip_fw_download:
/* reboot the tuner with new firmware? */
memcpy(cmd.args, "\x01\x01", 2);
cmd.wlen = 2;
@ -176,6 +181,9 @@ static int si2157_init(struct dvb_frontend *fe)
return 0;
err:
if (fw)
release_firmware(fw);
dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}