diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-core.c | 106 |
1 files changed, 88 insertions, 18 deletions
diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index a6446e637f17..56ead3d37926 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -259,6 +259,13 @@ static void cx23885_initialize(struct i2c_client *client) struct cx25840_state *state = to_state(i2c_get_clientdata(client)); struct workqueue_struct *q; + /* + * Come out of digital power down + * The CX23888, at least, needs this, otherwise registers aside from + * 0x0-0x2 can't be read or written. + */ + cx25840_write(client, 0x000, 0); + /* Internal Reset */ cx25840_and_or(client, 0x102, ~0x01, 0x01); cx25840_and_or(client, 0x102, ~0x01, 0x00); @@ -269,18 +276,45 @@ static void cx23885_initialize(struct i2c_client *client) /* DIF in reset? */ cx25840_write(client, 0x398, 0); - /* Trust the default xtal, no division */ - /* This changes for the cx23888 products */ + /* + * Trust the default xtal, no division + * '885: 28.636363... MHz + * '887: 25.000000 MHz + * '888: 50.000000 MHz + */ cx25840_write(client, 0x2, 0x76); - /* Bring down the regulator for AUX clk */ + /* Power up all the PLL's and DLL */ cx25840_write(client, 0x1, 0x40); - /* Sys PLL frac */ - cx25840_write4(client, 0x11c, 0x01d1744c); - - /* Sys PLL int */ - cx25840_write4(client, 0x118, 0x00000416); + /* Sys PLL */ + switch (state->id) { + case V4L2_IDENT_CX23888_AV: + /* + * 50.0 MHz * (0xb + 0xe8ba26/0x2000000)/4 = 5 * 28.636363 MHz + * 572.73 MHz before post divide + */ + cx25840_write4(client, 0x11c, 0x00e8ba26); + cx25840_write4(client, 0x118, 0x0000040b); + break; + case V4L2_IDENT_CX23887_AV: + /* + * 25.0 MHz * (0x16 + 0x1d1744c/0x2000000)/4 = 5 * 28.636363 MHz + * 572.73 MHz before post divide + */ + cx25840_write4(client, 0x11c, 0x01d1744c); + cx25840_write4(client, 0x118, 0x00000416); + break; + case V4L2_IDENT_CX23885_AV: + default: + /* + * 28.636363 MHz * (0x14 + 0x0/0x2000000)/4 = 5 * 28.636363 MHz + * 572.73 MHz before post divide + */ + cx25840_write4(client, 0x11c, 0x00000000); + cx25840_write4(client, 0x118, 0x00000414); + break; + } /* Disable DIF bypass */ cx25840_write4(client, 0x33c, 0x00000001); @@ -288,11 +322,15 @@ static void cx23885_initialize(struct i2c_client *client) /* DIF Src phase inc */ cx25840_write4(client, 0x340, 0x0df7df83); - /* Vid PLL frac */ - cx25840_write4(client, 0x10c, 0x01b6db7b); - - /* Vid PLL int */ - cx25840_write4(client, 0x108, 0x00000512); + /* + * Vid PLL + * Setup for a BT.656 pixel clock of 13.5 Mpixels/second + * + * 28.636363 MHz * (0xf + 0x02be2c9/0x2000000)/4 = 8 * 13.5 MHz + * 432.0 MHz before post divide + */ + cx25840_write4(client, 0x10c, 0x002be2c9); + cx25840_write4(client, 0x108, 0x0000040f); /* Luma */ cx25840_write4(client, 0x414, 0x00107d12); @@ -300,11 +338,43 @@ static void cx23885_initialize(struct i2c_client *client) /* Chroma */ cx25840_write4(client, 0x420, 0x3d008282); - /* Aux PLL frac */ - cx25840_write4(client, 0x114, 0x017dbf48); - - /* Aux PLL int */ - cx25840_write4(client, 0x110, 0x000a030e); + /* + * Aux PLL + * Initial setup for audio sample clock: + * 48 ksps, 16 bits/sample, x160 multiplier = 122.88 MHz + * Intial I2S output/master clock(?): + * 48 ksps, 16 bits/sample, x16 multiplier = 12.288 MHz + */ + switch (state->id) { + case V4L2_IDENT_CX23888_AV: + /* + * 50.0 MHz * (0x7 + 0x0bedfa4/0x2000000)/3 = 122.88 MHz + * 368.64 MHz before post divide + * 122.88 MHz / 0xa = 12.288 MHz + */ + cx25840_write4(client, 0x114, 0x00bedfa4); + cx25840_write4(client, 0x110, 0x000a0307); + break; + case V4L2_IDENT_CX23887_AV: + /* + * 25.0 MHz * (0xe + 0x17dbf48/0x2000000)/3 = 122.88 MHz + * 368.64 MHz before post divide + * 122.88 MHz / 0xa = 12.288 MHz + */ + cx25840_write4(client, 0x114, 0x017dbf48); + cx25840_write4(client, 0x110, 0x000a030e); + break; + case V4L2_IDENT_CX23885_AV: + default: + /* + * 28.636363 MHz * (0xc + 0x1bf0c9e/0x2000000)/3 = 122.88 MHz + * 368.64 MHz before post divide + * 122.88 MHz / 0xa = 12.288 MHz + */ + cx25840_write4(client, 0x114, 0x01bf0c9e); + cx25840_write4(client, 0x110, 0x000a030c); + break; + }; /* ADC2 input select */ cx25840_write(client, 0x102, 0x10); |
