[media] dib0700: fixup PLL config for PCTV 340e

Based on a reference trace under Windows, reverse engineer the PLL config.
Note that the xtal is not yet setup, and the timf cannot be determined yet
because my reference trace doesn't actually achieve a signal lock.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Cc: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 41 insertions, 1 deletions

diff --git a/drivers/media/dvb/dvb-usb/dib0700_devices.c b/drivers/media/dvb/dvb-usb/dib0700_devices.c
index aaf1eabf175f..790fca63248a 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_devices.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_devices.c
@@ -2735,13 +2735,53 @@ static struct dibx000_agc_config stk7700p_7000p_xc4000_agc_config = {
         .perform_agc_softsplit = 0x00,
 };
 
+/* validation:
+   reg 900 (0x0384) = 0x0e60
+   reg 903 (0x0387) = 0x0027
+   reg 18 (0x0012) = 0x0321
+   reg 19 (0x0013) = 0x1620
+   reg 21 (0x0015) = 0x0265
+   reg 22 (0x0016) =  0x6cbd
+   reg 23 (0x0017) = 0x0138
+   reg 24 (0x0018) = 0x1381
+   reg 72 (0x0048) = 0xd257
+   internal = 52500
+   sampling = never seems to be used?
+   pll_prediv = 1
+   pll_ratio = 7
+   pll_range = 3
+   pll_reset = 1
+   pll_bypass = 0
+   enable_refdiv = 0
+   bypclk_div = 0
+   IO_CLK_en_core = 1
+   ADClkSrc = 1
+   modulo = 0
+   sad_cfg: = 0xd257
+            refsel = (3 << 14)
+            sel = (1 << 12)
+            freq_15k = (599 << 0)
+   ifreq = 40201405
+   timf = ? (need lock to compute)
+   xtal_hz = ? (val dependent on exact tuning freq)
+ */
+static struct dibx000_bandwidth_config stk7700p_xc4000_pll_config = {
+        52500, 30000, // internal, sampling
+        1, 7, 3, 1, 0, // pll_cfg: prediv, ratio, range, reset, bypass
+        0, 0, 1, 1, 0, // misc: refdiv, bypclk_div, IO_CLK_en_core, ADClkSrc, modulo
+        (3 << 14) | (1 << 12) | (599 << 0), // sad_cfg: refsel, sel, freq_15k
+        40201405, // ifreq
+        20452225, // timf
+        30000000, // xtal
+};
+
 /* FIXME: none of these inputs are validated yet */
 static struct dib7000p_config pctv_340e_config = {
         .output_mpeg2_in_188_bytes = 1, // validated L3317: 0x00eb=0x0066
 
         .agc_config_count = 1,
         .agc = &stk7700p_7000p_xc4000_agc_config,
-        .bw  = &stk7700p_pll_config,
+        .bw  = &stk7700p_xc4000_pll_config,
 
         .gpio_dir = DIB7000M_GPIO_DEFAULT_DIRECTIONS,
         .gpio_val = DIB7000M_GPIO_DEFAULT_VALUES,