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V4L/DVB (3198): make cx25840 recover from some firmware load failures

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- In the rare event that a 333MHz i2c firmware load fails after
writing some data, this fix makes the driver reset the DL_ADDR
registers to the proper values before continuing on with 100MHz
transfers.

Signed-off-by: Tyler Trafford <tatrafford@comcast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
This commit is contained in:
Tyler Trafford 2006-01-09 15:25:29 -02:00 • committed by Mauro Carvalho Chehab
parent 83ac8722be
commit 210e207c1d
1 changed files with 11 additions and 2 deletions
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13
drivers/media/video/cx25840/cx25840-firmware.c
View file

@ -15,7 +15,6 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/ */
#include <linux/module.h> #include <linux/module.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/i2c-algo-bit.h> #include <linux/i2c-algo-bit.h>
@ -94,13 +93,23 @@ static inline int check_fw_load(struct i2c_client *client, int size)
static inline int fw_write(struct i2c_client *client, u8 * data, int size) static inline int fw_write(struct i2c_client *client, u8 * data, int size)
{ {
if (i2c_master_send(client, data, size) < size) { int sent;
if ((sent = i2c_master_send(client, data, size)) < size) {
if (fastfw) { if (fastfw) {
cx25840_err("333MHz i2c firmware load failed\n"); cx25840_err("333MHz i2c firmware load failed\n");
fastfw = 0; fastfw = 0;
set_i2c_delay(client, 10); set_i2c_delay(client, 10);
if (sent > 2) {
u16 dl_addr = cx25840_read(client, 0x801) << 8;
dl_addr |= cx25840_read(client, 0x800);
dl_addr -= sent - 2;
cx25840_write(client, 0x801, dl_addr >> 8);
cx25840_write(client, 0x800, dl_addr & 0xff);
}
if (i2c_master_send(client, data, size) < size) { if (i2c_master_send(client, data, size) < size) {
cx25840_err cx25840_err
("100MHz i2c firmware load failed\n"); ("100MHz i2c firmware load failed\n");