diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-i2c.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-i2c.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c index 4739fc7e6eb..36f5a9bc8b7 100644 --- a/drivers/media/video/em28xx/em28xx-i2c.c +++ b/drivers/media/video/em28xx/em28xx-i2c.c @@ -181,16 +181,25 @@ static int em2800_i2c_recv_bytes(struct em28xx *dev, unsigned char addr, /* * em28xx_i2c_send_bytes() - * untested for more than 4 bytes */ static int em28xx_i2c_send_bytes(void *data, unsigned char addr, char *buf, short len, int stop) { int wrcount = 0; struct em28xx *dev = (struct em28xx *)data; + int write_timeout, ret; wrcount = dev->em28xx_write_regs_req(dev, stop ? 2 : 3, addr, buf, len); + /* Seems to be required after a write */ + for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0; + write_timeout -= 5) { + ret = dev->em28xx_read_reg(dev, 0x05); + if (!ret) + break; + msleep(5); + } + return wrcount; } @@ -218,9 +227,7 @@ static int em28xx_i2c_recv_bytes(struct em28xx *dev, unsigned char addr, */ static int em28xx_i2c_check_for_device(struct em28xx *dev, unsigned char addr) { - char msg; int ret; - msg = addr; ret = dev->em28xx_read_reg_req(dev, 2, addr); if (ret < 0) { @@ -332,7 +339,9 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) struct em28xx_eeprom *em_eeprom = (void *)eedata; int i, err, size = len, block; - if (dev->chip_id == CHIP_ID_EM2874 || dev->chip_id == CHIP_ID_EM28174) { + if (dev->chip_id == CHIP_ID_EM2874 || + dev->chip_id == CHIP_ID_EM28174 || + dev->chip_id == CHIP_ID_EM2884) { /* Empia switched to a 16-bit addressable eeprom in newer devices. While we could certainly write a routine to read the eeprom, there is nothing of use in there that cannot be |