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path: root/drivers/media/dvb/frontends/tda1004x.c
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Diffstat (limited to 'drivers/media/dvb/frontends/tda1004x.c')
-rw-r--r--drivers/media/dvb/frontends/tda1004x.c30
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/media/dvb/frontends/tda1004x.c b/drivers/media/dvb/frontends/tda1004x.c
index 1465ff77b0c..4981cef8b44 100644
--- a/drivers/media/dvb/frontends/tda1004x.c
+++ b/drivers/media/dvb/frontends/tda1004x.c
@@ -162,7 +162,7 @@ static int tda1004x_read_byte(struct tda1004x_state *state, int reg)
if (ret != 2) {
dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg,
ret);
- return -1;
+ return -EINVAL;
}
dprintk("%s: success reg=0x%x, data=0x%x, ret=%i\n", __func__,
@@ -481,16 +481,18 @@ static void tda10046_init_plls(struct dvb_frontend* fe)
static int tda10046_fwupload(struct dvb_frontend* fe)
{
struct tda1004x_state* state = fe->demodulator_priv;
- int ret;
+ int ret, confc4;
const struct firmware *fw;
/* reset + wake up chip */
if (state->config->xtal_freq == TDA10046_XTAL_4M) {
- tda1004x_write_byteI(state, TDA1004X_CONFC4, 0);
+ confc4 = 0;
} else {
dprintk("%s: 16MHz Xtal, reducing I2C speed\n", __func__);
- tda1004x_write_byteI(state, TDA1004X_CONFC4, 0x80);
+ confc4 = 0x80;
}
+ tda1004x_write_byteI(state, TDA1004X_CONFC4, confc4);
+
tda1004x_write_mask(state, TDA10046H_CONF_TRISTATE1, 1, 0);
/* set GPIO 1 and 3 */
if (state->config->gpio_config != TDA10046_GPTRI) {
@@ -508,13 +510,29 @@ static int tda10046_fwupload(struct dvb_frontend* fe)
if (tda1004x_check_upload_ok(state) == 0)
return 0;
+ /*
+ For i2c normal work, we need to slow down the bus speed.
+ However, the slow down breaks the eeprom firmware load.
+ So, use normal speed for eeprom booting and then restore the
+ i2c speed after that. Tested with MSI TV @nyware A/D board,
+ that comes with firmware version 29 inside their eeprom.
+
+ It should also be noticed that no other I2C transfer should
+ be in course while booting from eeprom, otherwise, tda10046
+ goes into an instable state. So, proper locking are needed
+ at the i2c bus master.
+ */
printk(KERN_INFO "tda1004x: trying to boot from eeprom\n");
- tda1004x_write_mask(state, TDA1004X_CONFC4, 4, 4);
+ tda1004x_write_byteI(state, TDA1004X_CONFC4, 4);
msleep(300);
- /* don't re-upload unless necessary */
+ tda1004x_write_byteI(state, TDA1004X_CONFC4, confc4);
+
+ /* Checks if eeprom firmware went without troubles */
if (tda1004x_check_upload_ok(state) == 0)
return 0;
+ /* eeprom firmware didn't work. Load one manually. */
+
if (state->config->request_firmware != NULL) {
/* request the firmware, this will block until someone uploads it */
printk(KERN_INFO "tda1004x: waiting for firmware upload...\n");