From 347c4e95845fad1853c0e3da6603a44c5d6122b3 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 28 Sep 2012 16:28:51 -0300 Subject: [PATCH] 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 --- drivers/media/dvb-frontends/tda1004x.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/media/dvb-frontends/tda1004x.c b/drivers/media/dvb-frontends/tda1004x.c index 35d72b46aa1e..a2631be7ffac 100644 --- a/drivers/media/dvb-frontends/tda1004x.c +++ b/drivers/media/dvb-frontends/tda1004x.c @@ -329,6 +329,7 @@ static int tda1004x_do_upload(struct tda1004x_state *state, tda1004x_write_byteI(state, dspCodeCounterReg, 0); fw_msg.addr = state->config->demod_address; + i2c_lock_adapter(state->i2c); buf[0] = dspCodeInReg; while (pos != len) { // work out how much to send this time @@ -339,15 +340,18 @@ static int tda1004x_do_upload(struct tda1004x_state *state, // send the chunk memcpy(buf + 1, mem + pos, tx_size); 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"); + i2c_unlock_adapter(state->i2c); return -EIO; } pos += tx_size; 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); return 0;