target/linux/coldfire/patches/038-m5445x_audio_rates.patch

   1 From de5f4660856350ac43f642bb7c5adf063fc68287 Mon Sep 17 00:00:00 2001
   2 From: Kurt Mahan <kmahan@freescale.com>
   3 Date: Mon, 10 Dec 2007 13:15:33 -0700
   4 Subject: [PATCH] Fix to allow playback at other than 44.1.
   5
   6 LTIBName: m5445x-audio-rates
   7 Signed-off-by: Kurt Mahan <kmahan@freescale.com>
   8 ---
   9  drivers/spi/ssi_audio.c |   34 ++++++++++++++++++++++++----------
  10  1 files changed, 24 insertions(+), 10 deletions(-)
  11
  12 --- a/drivers/spi/ssi_audio.c
  13 +++ b/drivers/spi/ssi_audio.c
  14 @@ -34,7 +34,6 @@
  15  #define SOUND_DEVICE_NAME "sound"
  16  #define DRIVER_NAME "ssi_audio"
  17
  18 -
  19  /* #define AUDIO_DEBUG */
  20
  21  #ifdef CONFIG_MMU
  22 @@ -315,24 +314,36 @@ static inline void disable_ssi(void)
  23  }
  24
  25  /* Audio CODEC initialization */
  26 -/* TODO: also the SSI frequency/dividers must be adjusted */
  27  static void adjust_codec_speed(void) {
  28  #ifdef AUDIO_DEBUG
  29         printk(DRIVER_NAME ":adjust_codec_speed: %d\n", audio_device->speed);
  30  #endif
  31 -
  32 -       if (audio_device->speed == 8000) {
  33 +       disable_ssi();
  34 +       switch (audio_device->speed) {
  35 +       case 8000:
  36 +               MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(255);
  37                 codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_8KHZ);
  38 -       } else if (audio_device->speed == 16000) {
  39 +               break;
  40 +       case 16000:
  41 +               MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(129);
  42                 codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_16KHZ);
  43 -       } else if (audio_device->speed == 22000) {
  44 +               break;
  45 +       case 22000:
  46 +       case 22050:
  47 +               MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(94);
  48                 codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_22KHZ);
  49 -       } else if (audio_device->speed == 44000 || audio_device->speed == 44100) {
  50 +               break;
  51 +       case 44000:
  52 +       case 44100:
  53 +               MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(47);
  54                 codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_44KHZ);
  55 -       } else if (audio_device->speed == 48000) {
  56 +               break;
  57 +       case 48000:
  58 +               MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(42);
  59                 codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_48KHZ);
  60 -       } else {
  61 -               /* default 44KHz */
  62 +               break;
  63 +       default:
  64 +               MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(47);
  65                 codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_44KHZ);
  66         }
  67  }
  68 @@ -712,6 +723,9 @@ static int ssi_audio_ioctl(struct inode
  69         case SNDCTL_DSP_SAMPLESIZE:
  70                 if (access_ok(VERIFY_READ, (void *) arg, sizeof(val))) {
  71                         get_user(val, (unsigned long *) arg);
  72 +#ifdef AUDIO_DEBUG
  73 +                       printk(DRIVER_NAME ":ssi_audio_ioctl: SNDCTL_DSP_SAMPLESIZE: %d\n", val);
  74 +#endif
  75                         ssi_audio_txdrain();
  76                         ssi_audio_setsamplesize(val);
  77                 } else {