4 files changed, 72 insertions, 10 deletions

diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c
index dceebc0b1250..edea9e3d2dca 100644
--- a/drivers/media/video/saa7115.c
+++ b/drivers/media/video/saa7115.c
@@ -72,6 +72,10 @@ struct saa7115_state {
         int sat;
         enum v4l2_chip_ident ident;
         u32 audclk_freq;
+        u32 crystal_freq;
+        u8 ucgc;
+        u8 cgcdiv;
+        u8 apll;
 };
 
 /* ----------------------------------------------------------------------- */
@@ -375,10 +379,6 @@ static const unsigned char saa7113_init_auto_input[] = {
 };
 
 static const unsigned char saa7115_init_misc[] = {
-        0x38, 0x03,             /* audio stuff */
-        0x39, 0x10,
-        0x3a, 0x08,
-
         0x81, 0x01,             /* reg 0x15,0x16 define blanking window */
         0x82, 0x00,
         0x83, 0x01,             /* I port settings */
@@ -584,6 +584,7 @@ static int saa7115_set_audio_clock_freq(struct i2c_client *client, u32 freq)
         u32 acni;
         u32 hz;
         u64 f;
+        u8 acc = 0;     /* reg 0x3a, audio clock control */
 
         v4l_dbg(1, debug, client, "set audio clock freq: %d\n", freq);
 
@@ -591,18 +592,34 @@ static int saa7115_set_audio_clock_freq(struct i2c_client *client, u32 freq)
         if (freq < 32000 || freq > 48000)
                 return -EINVAL;
 
+        /* The saa7113 has no audio clock */
+        if (state->ident == V4L2_IDENT_SAA7113)
+                return 0;
+
         /* hz is the refresh rate times 100 */
         hz = (state->std & V4L2_STD_525_60) ? 5994 : 5000;
         /* acpf = (256 * freq) / field_frequency == (256 * 100 * freq) / hz */
         acpf = (25600 * freq) / hz;
         /* acni = (256 * freq * 2^23) / crystal_frequency =
                   (freq * 2^(8+23)) / crystal_frequency =
-                  (freq << 31) / 32.11 MHz */
+                  (freq << 31) / crystal_frequency */
         f = freq;
         f = f << 31;
-        do_div(f, 32110000);
+        do_div(f, state->crystal_freq);
         acni = f;
+        if (state->ucgc) {
+                acpf = acpf * state->cgcdiv / 16;
+                acni = acni * state->cgcdiv / 16;
+                acc = 0x80;
+                if (state->cgcdiv == 3)
+                        acc |= 0x40;
+        }
+        if (state->apll)
+                acc |= 0x08;
 
+        saa7115_write(client, 0x38, 0x03);
+        saa7115_write(client, 0x39, 0x10);
+        saa7115_write(client, 0x3a, acc);
         saa7115_write(client, 0x30, acpf & 0xff);
         saa7115_write(client, 0x31, (acpf >> 8) & 0xff);
         saa7115_write(client, 0x32, (acpf >> 16) & 0x03);
@@ -1260,6 +1277,21 @@ static int saa7115_command(struct i2c_client *client, unsigned int cmd, void *ar
                 }
                 break;
 
+        case VIDIOC_INT_S_CRYSTAL_FREQ:
+        {
+                struct v4l2_crystal_freq *freq = arg;
+
+                if (freq->freq != SAA7115_FREQ_32_11_MHZ &&
+                    freq->freq != SAA7115_FREQ_24_576_MHZ)
+                        return -EINVAL;
+                state->crystal_freq = freq->freq;
+                state->cgcdiv = (freq->flags & SAA7115_FREQ_FL_CGCDIV) ? 3 : 4;
+                state->ucgc = (freq->flags & SAA7115_FREQ_FL_UCGC) ? 1 : 0;
+                state->apll = (freq->flags & SAA7115_FREQ_FL_APLL) ? 1 : 0;
+                saa7115_set_audio_clock_freq(client, state->audclk_freq);
+                break;
+        }
+
         case VIDIOC_INT_DECODE_VBI_LINE:
                 saa7115_decode_vbi_line(client, arg);
                 break;
@@ -1401,10 +1433,13 @@ static int saa7115_attach(struct i2c_adapter *adapter, int address, int kind)
         v4l_dbg(1, debug, client, "writing init values\n");
 
         /* init to 60hz/48khz */
-        if (state->ident == V4L2_IDENT_SAA7113)
+        if (state->ident == V4L2_IDENT_SAA7113) {
+                state->crystal_freq = SAA7115_FREQ_24_576_MHZ;
                 saa7115_writeregs(client, saa7113_init_auto_input);
-        else
+        } else {
+                state->crystal_freq = SAA7115_FREQ_32_11_MHZ;
                 saa7115_writeregs(client, saa7115_init_auto_input);
+        }
         saa7115_writeregs(client, saa7115_init_misc);
         saa7115_writeregs(client, saa7115_cfg_60hz_fullres_x);
         saa7115_writeregs(client, saa7115_cfg_60hz_fullres_y);
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index d330fa985bcc..ad92e07e74f7 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -331,7 +331,8 @@ static const char *v4l2_int_ioctls[] = {
         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
-        [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING"
+        [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
+        [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ"
 };
 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 
@@ -667,6 +668,12 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg)
                 printk ("%s: input=0x%x, output=0x%x\n", s, p->input, p->output);
                 break;
         }
+        case VIDIOC_INT_S_CRYSTAL_FREQ:
+        {
+                struct v4l2_crystal_freq *p=arg;
+                printk ("%s: freq=%u, flags=0x%x\n", s, p->freq, p->flags);
+                break;
+        }
         case VIDIOC_G_SLICED_VBI_CAP:
         {
                 struct v4l2_sliced_vbi_cap *p=arg;
diff --git a/include/media/saa7115.h b/include/media/saa7115.h
index 6b4836f3f057..9f0e2285a099 100644
--- a/include/media/saa7115.h
+++ b/include/media/saa7115.h
@@ -1,5 +1,5 @@
 /*
-    saa7115.h - definition for saa7113/4/5 inputs
+    saa7115.h - definition for saa7113/4/5 inputs and frequency flags
 
     Copyright (C) 2006 Hans Verkuil (hverkuil@xs4all.nl)
 
@@ -33,5 +33,14 @@
 #define SAA7115_SVIDEO2    8
 #define SAA7115_SVIDEO3    9
 
+/* SAA7115 v4l2_crystal_freq frequency values */
+#define SAA7115_FREQ_32_11_MHZ  32110000   /* 32.11 MHz crystal, SAA7114/5 only */
+#define SAA7115_FREQ_24_576_MHZ 24576000   /* 24.576 MHz crystal */
+
+/* SAA7115 v4l2_crystal_freq audio clock control flags */
+#define SAA7115_FREQ_FL_UCGC   (1 << 0)    /* SA 3A[7], UCGC, SAA7115 only */
+#define SAA7115_FREQ_FL_CGCDIV (1 << 1)    /* SA 3A[6], CGCDIV, SAA7115 only */
+#define SAA7115_FREQ_FL_APLL   (1 << 2)    /* SA 3A[3], APLL, SAA7114/5 only */
+
 #endif
 
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 642520acdfa7..827f7edcd665 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -211,4 +211,15 @@ struct v4l2_routing {
 #define VIDIOC_INT_S_VIDEO_ROUTING      _IOW ('d', 111, struct v4l2_routing)
 #define VIDIOC_INT_G_VIDEO_ROUTING      _IOR ('d', 112, struct v4l2_routing)
 
+struct v4l2_crystal_freq {
+        u32 freq;       /* frequency in Hz of the crystal */
+        u32 flags;      /* device specific flags */
+};
+
+/* Sets the frequency of the crystal used to generate the clocks.
+   An extra flags field allows device specific configuration regarding
+   clock frequency dividers, etc. If not used, then set flags to 0.
+   If the frequency is not supported, then -EINVAL is returned. */
+#define VIDIOC_INT_S_CRYSTAL_FREQ       _IOW ('d', 113, struct v4l2_crystal_freq)
+
 #endif /* V4L2_COMMON_H_ */