mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 18:41:23 +00:00
[media] cx24116: add config option to split firmware download
It is very rare I2C adapter hardware which can provide 32kB I2C write as one write. Add .i2c_wr_max option to set desired max packet size. Split transaction to smaller pieces according to that option. Signed-off-by: Antti Palosaari <crope@iki.fi> Cc: Steven Toth <stoth@hauppauge.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
parent
f3b1af1964
commit
107d7b181d
@ -566,7 +566,7 @@ static int cx24116_load_firmware(struct dvb_frontend *fe,
|
||||
{
|
||||
struct cx24116_state *state = fe->demodulator_priv;
|
||||
struct cx24116_cmd cmd;
|
||||
int i, ret;
|
||||
int i, ret, len, remaining;
|
||||
unsigned char vers[4];
|
||||
|
||||
dprintk("%s\n", __func__);
|
||||
@ -603,8 +603,19 @@ static int cx24116_load_firmware(struct dvb_frontend *fe,
|
||||
cx24116_writereg(state, 0xF5, 0x00);
|
||||
cx24116_writereg(state, 0xF6, 0x00);
|
||||
|
||||
/* write the entire firmware as one transaction */
|
||||
cx24116_writeregN(state, 0xF7, fw->data, fw->size);
|
||||
/* Split firmware to the max I2C write len and write.
|
||||
* This overflows 16 bit intentionally in order to get max write
|
||||
* len when i2c_wr_max is set to 0. */
|
||||
for (remaining = fw->size; remaining > 0;
|
||||
remaining -= (u16) (state->config->i2c_wr_max - 1)) {
|
||||
|
||||
len = remaining;
|
||||
if (len > (u16) (state->config->i2c_wr_max - 1))
|
||||
len = (u16) (state->config->i2c_wr_max - 1);
|
||||
|
||||
cx24116_writeregN(state, 0xF7, &fw->data[fw->size - remaining],
|
||||
len);
|
||||
}
|
||||
|
||||
cx24116_writereg(state, 0xF4, 0x10);
|
||||
cx24116_writereg(state, 0xF0, 0x00);
|
||||
|
@ -35,6 +35,9 @@ struct cx24116_config {
|
||||
|
||||
/* Need to set MPEG parameters */
|
||||
u8 mpg_clk_pos_pol:0x02;
|
||||
|
||||
/* max bytes I2C provider can write at once */
|
||||
u16 i2c_wr_max;
|
||||
};
|
||||
|
||||
#if defined(CONFIG_DVB_CX24116) || \
|
||||
|
Loading…
Reference in New Issue
Block a user