提交 210e207c 编写于 作者: T Tyler Trafford 提交者: Mauro Carvalho Chehab

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


- 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: NTyler Trafford <tatrafford@comcast.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@brturbo.com.br>
上级 83ac8722
......@@ -15,7 +15,6 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/module.h>
#include <linux/i2c.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)
{
if (i2c_master_send(client, data, size) < size) {
int sent;
if ((sent = i2c_master_send(client, data, size)) < size) {
if (fastfw) {
cx25840_err("333MHz i2c firmware load failed\n");
fastfw = 0;
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) {
cx25840_err
("100MHz i2c firmware load failed\n");
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册