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CMI: add code from Linux source.
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@crazii
crazii committed Jan 20, 2024
1 parent 0b48fd9 commit 1d57f76
Showing 1 changed file with 40 additions and 14 deletions.
54 changes: 40 additions & 14 deletions mpxplay/au_cards/sc_cmi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -255,6 +255,8 @@
*/
#define CM_REG_FM_PCI 0x50

#define CM_REG_EXT_MISC 0x90

/*
* for CMI-8338 .. this is not valid for CMI-8738.
*/
Expand All @@ -277,9 +279,10 @@
* extended registers
*/
#define CM_REG_CH0_FRAME1 0x80 /* base address */
#define CM_REG_CH0_FRAME2 0x84
#define CM_REG_CH1_FRAME1 0x88 /* 0-15: count of samples at bus master; buffer size */
#define CM_REG_CH1_FRAME2 0x8C /* 16-31: count of samples at codec; fragment size */
#define CM_REG_CH0_FRAME2 0x84 /* 0-15: count of samples at bus master; buffer size */
/* 16-31: count of samples at codec; fragment size */
#define CM_REG_CH1_FRAME1 0x88
#define CM_REG_CH1_FRAME2 0x8C

/*
* size of i/o region
Expand All @@ -295,6 +298,8 @@
/*
* pci ids
*/
#define PCI_DEVICE_ID_CMEDIA_CM8338A 0x0100
#define PCI_DEVICE_ID_CMEDIA_CM8338B 0x0101
#define PCI_DEVICE_ID_CMEDIA_CM8738 0x0111
#define PCI_DEVICE_ID_CMEDIA_CM8738B 0x0112

Expand Down Expand Up @@ -429,11 +434,11 @@ static unsigned int snd_cmipci_rate_freq(unsigned int rate)
return 7; // 48k
}

static void snd_cmipci_ch_reset(cmi8x38_card *cm, int ch) //reset ADC
static void snd_cmipci_ch_reset(cmi8x38_card *cm, int ch) //reset ADC channel 1
{
int reset = CM_RST_CH0 << ch;
snd_cmipci_write_32(cm, CM_REG_FUNCTRL0, CM_CHADC0 | reset);
snd_cmipci_write_32(cm, CM_REG_FUNCTRL0, CM_CHADC0 & (~reset));
snd_cmipci_write_32(cm, CM_REG_FUNCTRL0, CM_CHADC1 | reset);
snd_cmipci_write_32(cm, CM_REG_FUNCTRL0, CM_CHADC1 & (~reset));
pds_delay_10us(1);
}

Expand Down Expand Up @@ -522,9 +527,13 @@ static void query_chip(cmi8x38_card *cm)
static void cmi8x38_chip_init(struct cmi8x38_card *cm)
{
unsigned int val;
cm->ctrl = 0; // ch0 playback
cm->ctrl = 0; // ch0 playback

query_chip(cm);
cm->chip_version = 0;
cm->max_channels = 2;
if (cm->pci_dev->device_id != PCI_DEVICE_ID_CMEDIA_CM8338A &&
cm->pci_dev->device_id != PCI_DEVICE_ID_CMEDIA_CM8338B)
query_chip(cm);

/* initialize codec registers */
snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_RESET); //reset DSP/Bus master
Expand All @@ -533,6 +542,8 @@ static void cmi8x38_chip_init(struct cmi8x38_card *cm)
pds_delay_10us(10);
//choose the right mixerset based on chip_version
CMI8X38_choose_mixerset(cm);
if(cm->chip_version <= 37)
pcibios_WriteConfig_Dword(cm->pci_dev, 0x40, 0); //disable DMA slave

snd_cmipci_write_32(cm, CM_REG_INT_HLDCLR, 0); /* disable ints */
snd_cmipci_ch_reset(cm, CM_CH_PLAY);
Expand All @@ -543,6 +554,14 @@ static void cmi8x38_chip_init(struct cmi8x38_card *cm)
snd_cmipci_write_32(cm, CM_REG_CHFORMAT, 0);
snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_ENDBDAC|CM_N4SPK3D);
snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_XCHGDAC);

//magic from Linux source
if (cm->chip_version) {
snd_cmipci_write_8(cm, CM_REG_EXT_MISC, 0x20); /* magic */
snd_cmipci_write_8(cm, CM_REG_EXT_MISC + 1, 0x09); /* more magic */
}
snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL|CM_AC3EN2); //disable 32bit PCM/AC3

/* Set Bus Master Request */
snd_cmipci_set_bit(cm, CM_REG_FUNCTRL1, CM_BREQ);

Expand Down Expand Up @@ -686,9 +705,9 @@ static void CMI8X38_setrate(struct mpxplay_audioout_info_s *aui)
//hw config

//reset dac, disable ch
card->ctrl &= ~CM_CHEN0;
snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl | CM_RST_CH0);
snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl & ~CM_RST_CH0);
//card->ctrl &= ~CM_CHEN0;
//snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl | CM_RST_CH0);
//snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl & ~CM_RST_CH0);

//format cfg
card->fmt=0;
Expand Down Expand Up @@ -746,8 +765,8 @@ static void CMI8X38_setrate(struct mpxplay_audioout_info_s *aui)
// set format
val = snd_cmipci_read_32(card, CM_REG_CHFORMAT);

val &= CM_ADCDACLEN_MASK;
val |= CM_ADCDACLEN_130; //adc sample resolution
//val &= CM_ADCDACLEN_MASK;
//val |= CM_ADCDACLEN_130; //adc sample resolution, also 00 will work (highest)

val &= ~CM_CH0FMT_MASK;
val |= card->fmt << CM_CH0FMT_SHIFT;
Expand All @@ -766,18 +785,25 @@ static void CMI8X38_start(struct mpxplay_audioout_info_s *aui)
{
struct cmi8x38_card *card=aui->card_private_data;
#ifdef SBEMU
snd_cmipci_write_32(card, CM_REG_INT_HLDCLR, CM_TDMA_INT_EN|CM_CH1_INT_EN|CM_CH0_INT_EN); /* enable ints */
snd_cmipci_write_32(card, CM_REG_INT_HLDCLR, CM_CH0_INT_EN); /* enable ints */
#endif
card->ctrl |= CM_CHEN0;
card->ctrl &= ~CM_PAUSE0;
card->ctrl &= ~CM_CHADC0;
snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl);
}

static void CMI8X38_stop(struct mpxplay_audioout_info_s *aui)
{
struct cmi8x38_card *card=aui->card_private_data;
#ifdef SBEMU
snd_cmipci_write_32(card, CM_REG_INT_HLDCLR, 0); /* disable ints */
#endif
card->ctrl &= ~CM_CHEN0;
card->ctrl |= CM_PAUSE0;
snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl);
snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl | CM_RST_CH0);
snd_cmipci_write_32(card, CM_REG_FUNCTRL0, card->ctrl & ~CM_RST_CH0);
}

static long CMI8X38_getbufpos(struct mpxplay_audioout_info_s *aui)
Expand Down

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