V4L/DVB (9269): cx88: add I2S-ADC tvaudio method

This adds I2S-ADC tvaudio mode as a formal method of audio
delivery.

This fixes one bug and adds fm audio via I2S-ADC on cards
that support it.

The bug occured before when I2S-ADC mode was initiated on
composite/s-video open but was then reset within 500ms
by the audio thread which used any previous audio tuning
details.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cx88/cx88-tvaudio.c b/drivers/media/video/cx88/cx88-tvaudio.c
index 3a1977f..7dd506b 100644 (file)
--- a/drivers/media/video/cx88/cx88-tvaudio.c
+++ b/drivers/media/video/cx88/cx88-tvaudio.c
@@ -767,6 +767,14 @@ void cx88_set_tvaudio(struct cx88_core *core)
        case WW_FM:
                set_audio_standard_FM(core, radio_deemphasis);
                break;
+       case WW_I2SADC:
+               set_audio_start(core, 0x01);
+               /* Slave/Philips/Autobaud */
+               cx_write(AUD_I2SINPUTCNTL, 0);
+               /* Switch to "I2S ADC mode" */
+               cx_write(AUD_I2SCNTL, 0x1);
+               set_audio_finish(core, EN_I2SIN_ENABLE);
+               break;
        case WW_NONE:
        default:
                printk("%s/0: unknown tv audio mode [%d]\n",
@@ -895,6 +903,9 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
                        break;
                }
                break;
+       case WW_I2SADC:
+               /* DO NOTHING */
+               break;
        }
 
        if (UNSET != ctl) {

diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index be45955..3904b73 100644 (file)
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -426,24 +426,7 @@ int cx88_video_mux(struct cx88_core *core, unsigned int input)
 
        /* if there are audioroutes defined, we have an external
           ADC to deal with audio */
-
        if (INPUT(input).audioroute) {
-
-               /* cx2388's C-ADC is connected to the tuner only.
-                  When used with S-Video, that ADC is busy dealing with
-                  chroma, so an external must be used for baseband audio */
-
-               if (INPUT(input).type != CX88_VMUX_TELEVISION &&
-                       INPUT(input).type != CX88_RADIO) {
-                       /* "ADC mode" */
-                       cx_write(AUD_I2SCNTL, 0x1);
-                       cx_set(AUD_CTL, EN_I2SIN_ENABLE);
-               } else {
-                       /* Normal mode */
-                       cx_write(AUD_I2SCNTL, 0x0);
-                       cx_clear(AUD_CTL, EN_I2SIN_ENABLE);
-               }
-
                /* The wm8775 module has the "2" route hardwired into
                   the initialization. Some boards may use different
                   routes for different inputs. HVR-1300 surely does */
@@ -454,9 +437,19 @@ int cx88_video_mux(struct cx88_core *core, unsigned int input)
                        route.input = INPUT(input).audioroute;
                        cx88_call_i2c_clients(core,
                                VIDIOC_INT_S_AUDIO_ROUTING, &route);
-
                }
-
+               /* cx2388's C-ADC is connected to the tuner only.
+                  When used with S-Video, that ADC is busy dealing with
+                  chroma, so an external must be used for baseband audio */
+               if (INPUT(input).type != CX88_VMUX_TELEVISION ) {
+                       /* "I2S ADC mode" */
+                       core->tvaudio = WW_I2SADC;
+                       cx88_set_tvaudio(core);
+               } else {
+                       /* Normal mode */
+                       cx_write(AUD_I2SCNTL, 0x0);
+                       cx_clear(AUD_CTL, EN_I2SIN_ENABLE);
+               }
        }
 
        return 0;
@@ -832,9 +825,24 @@ static int video_open(struct inode *inode, struct file *file)
                cx_write(MO_GP0_IO, core->board.radio.gpio0);
                cx_write(MO_GP1_IO, core->board.radio.gpio1);
                cx_write(MO_GP2_IO, core->board.radio.gpio2);
-               core->tvaudio = WW_FM;
-               cx88_set_tvaudio(core);
-               cx88_set_stereo(core,V4L2_TUNER_MODE_STEREO,1);
+               if (core->board.radio.audioroute) {
+                       if(core->board.audio_chip &&
+                               core->board.audio_chip == V4L2_IDENT_WM8775) {
+                               struct v4l2_routing route;
+
+                               route.input = core->board.radio.audioroute;
+                               cx88_call_i2c_clients(core,
+                                       VIDIOC_INT_S_AUDIO_ROUTING, &route);
+                       }
+                       /* "I2S ADC mode" */
+                       core->tvaudio = WW_I2SADC;
+                       cx88_set_tvaudio(core);
+               } else {
+                       /* FM Mode */
+                       core->tvaudio = WW_FM;
+                       cx88_set_tvaudio(core);
+                       cx88_set_stereo(core,V4L2_TUNER_MODE_STEREO,1);
+               }
                cx88_call_i2c_clients(core,AUDC_SET_RADIO,NULL);
        }
        unlock_kernel();

diff --git a/drivers/media/video/cx88/cx88.h b/drivers/media/video/cx88/cx88.h
index 100ffc4..76207c2 100644 (file)
--- a/drivers/media/video/cx88/cx88.h
+++ b/drivers/media/video/cx88/cx88.h
@@ -630,6 +630,7 @@ extern void cx88_setup_xc3028(struct cx88_core *core, struct xc2028_ctrl *ctl);
 #define WW_EIAJ                 7
 #define WW_I2SPT        8
 #define WW_FM           9
+#define WW_I2SADC       10
 
 void cx88_set_tvaudio(struct cx88_core *core);
 void cx88_newstation(struct cx88_core *core);