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authorDevin Heitmueller <dheitmueller@linuxtv.org>2008-12-29 22:27:30 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-12-30 09:40:35 -0200
commited14e1c2f419a380c7a1a3483ac2443d20a24355 (patch)
tree293192d47aa8d96ee69e5c8c77399443ecf967fc
parent60b4bde48b36c0315ef41fd38c339b9c7e68c46f (diff)
V4L/DVB (10119): em28xx: fix corrupted XCLK value
Correct problem introduced during the board refactoring where the XCLK frequency would get zero'd out. The sequence of events was as follows: em28xx_pre_card_setup() called em28xx_set_model() em28xx_set_model() would memcpy to dev->board configuration em28xx_pre_card_setup() would set the dev->board.xclk if not set em28xx_pre_card_setup() would set the XCLK register based on dev->board.xclk ... em28xx_card_setup() would call em28xx_set_model() em28xx_set_model() would memcpy to dev->board configuration (clearing out value of dev->board.xclk set in em28xx_pre_card_setup) ... em28xx_audio_analog_set() sets the XCLK register based on dev->board.xclk (which now contains zero) The change sets the default XCLK and I2C Clock fields in the board definition inside of em28xx_set_model() so that subsequent calls do not cause the values to be overwritten. Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/video/em28xx/em28xx-cards.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index 11ce63578e9..c427c0eeba1 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -1403,6 +1403,17 @@ EXPORT_SYMBOL_GPL(em28xx_tuner_callback);
static void inline em28xx_set_model(struct em28xx *dev)
{
memcpy(&dev->board, &em28xx_boards[dev->model], sizeof(dev->board));
+
+ /* Those are the default values for the majority of boards
+ Use those values if not specified otherwise at boards entry
+ */
+ if (!dev->board.xclk)
+ dev->board.xclk = EM28XX_XCLK_IR_RC5_MODE |
+ EM28XX_XCLK_FREQUENCY_12MHZ;
+
+ if (!dev->board.i2c_speed)
+ dev->board.i2c_speed = EM28XX_I2C_CLK_WAIT_ENABLE |
+ EM28XX_I2C_FREQ_100_KHZ;
}
/* Since em28xx_pre_card_setup() requires a proper dev->model,
@@ -1464,17 +1475,8 @@ void em28xx_pre_card_setup(struct em28xx *dev)
if (rc >= 0)
dev->reg_gpo = rc;
- /* Those are the default values for the majority of boards
- Use those values if not specified otherwise at boards entry
- */
- if (!dev->board.xclk)
- dev->board.xclk = EM28XX_XCLK_IR_RC5_MODE |
- EM28XX_XCLK_FREQUENCY_12MHZ;
-
- if (!dev->board.i2c_speed)
- dev->board.i2c_speed = EM28XX_I2C_CLK_WAIT_ENABLE |
- EM28XX_I2C_FREQ_100_KHZ;
-
+ /* Set the initial XCLK and I2C clock values based on the board
+ definition */
em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk & 0x7f);
em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, dev->board.i2c_speed);
msleep(50);