diff options
| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-18 04:42:14 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-24 21:09:42 +0400 |
| commit | 89b329ef9d7cc16ed46fc991b21b2d45e7bf452c (patch) | |
| tree | 1cd9ce2b15423282d50e6a96ed5ff789030e7cdf /drivers/media/video/em28xx | |
| parent | 7640ea99339c687864f6131598e2eee2ca73cb9c (diff) | |
| download | linux-89b329ef9d7cc16ed46fc991b21b2d45e7bf452c.tar.xz | |
V4L/DVB (7610): em28xx: Select reg wait time based on chip ID
This is more conservative than just removing the msleep() from
em28xx_write_regs_req(), since some old hardware may still need it.
So, it will remove the sleep time only for those chips where this
removal were tested.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/em28xx')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-cards.c | 14 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 3 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx.h | 3 |
4 files changed, 20 insertions, 4 deletions
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c index 7dfea3ac9b2f..0c71e599c140 100644 --- a/drivers/media/video/em28xx/em28xx-cards.c +++ b/drivers/media/video/em28xx/em28xx-cards.c @@ -525,6 +525,20 @@ static void em28xx_set_model(struct em28xx *dev) */ void em28xx_pre_card_setup(struct em28xx *dev) { + int rc; + + dev->wait_after_write = 5; + rc = em28xx_read_reg(dev, CHIPID_REG); + if (rc > 0) { + switch (rc) { + case 36: + em28xx_info("chip ID is em2882/em2883\n"); + dev->wait_after_write = 0; + break; + default: + em28xx_info("em28xx chip ID = %d\n", rc); + } + } em28xx_set_model(dev); /* request some modules */ diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index 9cbc4788090c..e47b206187b5 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c @@ -153,6 +153,9 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, bufs, len, HZ); + if (dev->wait_after_write) + msleep(dev->wait_after_write); + kfree(bufs); return ret; } diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 1ac90322d681..a8aa09c5bc5f 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1927,10 +1927,6 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, dev->em28xx_read_reg_req = em28xx_read_reg_req; dev->is_em2800 = em28xx_boards[dev->model].is_em2800; - errCode = em28xx_read_reg(dev, CHIPID_REG); - if (errCode >= 0) - em28xx_info("em28xx chip ID = %d\n", errCode); - em28xx_pre_card_setup(dev); errCode = em28xx_config(dev); diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index 5b21efaf7844..8f12b848b1d1 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -331,6 +331,9 @@ struct em28xx { unsigned int max_range_640_480:1; unsigned int has_dvb:1; + /* Some older em28xx chips needs a waiting time after writing */ + unsigned int wait_after_write; + /* GPIO sequences for tuner callback */ struct em28xx_reg_seq *analog_gpio, *digital_gpio; |