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tda1004x: Lock I2C bus during firmware load 

tda1004x doesn't allow firmware loads while it is busy with something
else. Avoid it to happen by locking the I2C bus during firmware transfer.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2012-09-28 16:28:51 -03:00
parent 25ec43d3e6
commit 347c4e9584
1 changed files with 6 additions and 2 deletions
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8
drivers/media/dvb-frontends/tda1004x.c
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@ -329,6 +329,7 @@ static int tda1004x_do_upload(struct tda1004x_state *state,
tda1004x_write_byteI(state, dspCodeCounterReg, 0); tda1004x_write_byteI(state, dspCodeCounterReg, 0);
fw_msg.addr = state->config->demod_address; fw_msg.addr = state->config->demod_address;
i2c_lock_adapter(state->i2c);
buf[0] = dspCodeInReg; buf[0] = dspCodeInReg;
while (pos != len) { while (pos != len) {
// work out how much to send this time // work out how much to send this time
@ -339,15 +340,18 @@ static int tda1004x_do_upload(struct tda1004x_state *state,
// send the chunk // send the chunk
memcpy(buf + 1, mem + pos, tx_size); memcpy(buf + 1, mem + pos, tx_size);
fw_msg.len = tx_size + 1; fw_msg.len = tx_size + 1;
if (i2c_transfer(state->i2c, &fw_msg, 1) != 1) { if (__i2c_transfer(state->i2c, &fw_msg, 1) != 1) {
printk(KERN_ERR "tda1004x: Error during firmware upload\n"); printk(KERN_ERR "tda1004x: Error during firmware upload\n");
i2c_unlock_adapter(state->i2c);
return -EIO; return -EIO;
} }
pos += tx_size; pos += tx_size;
dprintk("%s: fw_pos=0x%x\n", __func__, pos); dprintk("%s: fw_pos=0x%x\n", __func__, pos);
} }
// give the DSP a chance to settle 03/10/05 Hac i2c_unlock_adapter(state->i2c);
/* give the DSP a chance to settle 03/10/05 Hac */
msleep(100); msleep(100);
return 0; return 0;