Pull 5165 into release branch

[linux-2.6-omap-h63xx.git] / drivers / media / video / cx88 / cx88-core.c

diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c
index f01a631d0c002900aafdaed1a14c53b4746c053c..bb6eb54e19ceddcb4726ee9dfc5117baa8c73ef1 100644 (file)
--- a/drivers/media/video/cx88/cx88-core.c
+++ b/drivers/media/video/cx88/cx88-core.c
@@ -166,9 +166,9 @@ static u32* cx88_risc_field(u32 *rp, struct scatterlist *sglist,
                        offset = 0;
                        sg++;
                        while (todo > sg_dma_len(sg)) {
-                               *(rp++)=cpu_to_le32(RISC_WRITE|
+                               *(rp++)=cpu_to_le32(RISC_WRITE|
                                                    sg_dma_len(sg));
-                               *(rp++)=cpu_to_le32(sg_dma_address(sg));
+                               *(rp++)=cpu_to_le32(sg_dma_address(sg));
                                todo -= sg_dma_len(sg);
                                sg++;
                        }
@@ -837,6 +837,29 @@ static int set_pll(struct cx88_core *core, int prescale, u32 ofreq)
        return -1;
 }
 
+int cx88_start_audio_dma(struct cx88_core *core)
+{
+       /* setup fifo + format */
+       cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], 128, 0);
+       cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], 128, 0);
+
+       cx_write(MO_AUDD_LNGTH,    128); /* fifo bpl size */
+       cx_write(MO_AUDR_LNGTH,    128); /* fifo bpl size */
+
+       /* start dma */
+       cx_write(MO_AUD_DMACNTRL, 0x0003); /* Up and Down fifo enable */
+
+       return 0;
+}
+
+int cx88_stop_audio_dma(struct cx88_core *core)
+{
+       /* stop dma */
+       cx_write(MO_AUD_DMACNTRL, 0x0000);
+
+       return 0;
+}
+
 static int set_tvaudio(struct cx88_core *core)
 {
        struct cx88_tvnorm *norm = core->tvnorm;
@@ -877,12 +900,16 @@ static int set_tvaudio(struct cx88_core *core)
        cx88_set_tvaudio(core);
        /* cx88_set_stereo(dev,V4L2_TUNER_MODE_STEREO); */
 
-       cx_write(MO_AUDD_LNGTH,    128); /* fifo size */
-       cx_write(MO_AUDR_LNGTH,    128); /* fifo size */
-       cx_write(MO_AUD_DMACNTRL, 0x03); /* need audio fifo */
+/*
+   This should be needed only on cx88-alsa. It seems that some cx88 chips have
+   bugs and does require DMA enabled for it to work.
+ */
+       cx88_start_audio_dma(core);
        return 0;
 }
 
+
+
 int cx88_set_tvnorm(struct cx88_core *core, struct cx88_tvnorm *norm)
 {
        u32 fsc8;
@@ -1204,6 +1231,8 @@ EXPORT_SYMBOL(cx88_set_scale);
 EXPORT_SYMBOL(cx88_vdev_init);
 EXPORT_SYMBOL(cx88_core_get);
 EXPORT_SYMBOL(cx88_core_put);
+EXPORT_SYMBOL(cx88_start_audio_dma);
+EXPORT_SYMBOL(cx88_stop_audio_dma);
 
 /*
  * Local variables: