static int snd_aicapcm_pcm_open(struct snd_pcm_substream
*substream)
{
struct snd_pcm_runtime *runtime;
struct aica_channel *channel;
struct snd_card_aica *dreamcastcard;
if (!enable)
return -ENOENT;
dreamcastcard = substream->pcm->private_data;
channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
if (!channel)
return -ENOMEM;
/* set defaults for channel */
channel->sfmt = SM_8BIT;
channel->cmd = AICA_CMD_START;
channel->vol = dreamcastcard->master_volume;
channel->pan = 0x80;
channel->pos = 0;
channel->flags = 0; /* default to mono */
dreamcastcard->channel = channel;
runtime = substream->runtime;
runtime->hw = snd_pcm_aica_playback_hw;
spu_enable();
dreamcastcard->clicks = 0;
dreamcastcard->current_period = 0;
dreamcastcard->dma_check = 0;
return 0;
}
int snd_init_firmware(const char *filename) {
file_t f;
size_t sz;
uint8 *buff;
f = fs_open(filename, O_RDONLY);
if(f < 0) {
ds_printf("DS_ERROR: Can't open firmware %s\n", filename);
return -1;
}
sz = fs_total(f);
ds_printf("DS_PROCESS: Loading firmware %s (%d bytes) into SPU RAM\n", filename, sz);
buff = (uint8*)malloc(sz);
fs_read(f, buff, sz);
fs_close(f);
spu_disable();
spu_memset(0, 0, AICA_RAM_START);
spu_memload(0, buff, sz);
/* Enable the AICA and give it a few ms to start up */
spu_enable();
timer_spin_sleep(10);
/* Initialize the RAM allocator */
snd_mem_init(AICA_RAM_START);
return 0;
}
/* Initialize driver; note that this replaces the AICA program so that
if you had anything else going on, it's gone now! */
int snd_init() {
int amt;
/* Finish loading the stream driver */
if (!initted) {
spu_disable();
spu_memset(0, 0, AICA_RAM_START);
amt = snd_stream_drv_end - snd_stream_drv;
if (amt % 4)
amt = (amt + 4) & ~3;
printf("snd_init(): loading %d bytes into SPU RAM\n", amt);
spu_memload(0, snd_stream_drv, amt);
/* Enable the AICA and give it a few ms to start up */
spu_enable();
timer_spin_sleep(10);
/* Initialize the RAM allocator */
snd_mem_init(AICA_RAM_START);
/* Setup semaphores */
sem_qram = sem_create(1);
}
initted = 1;
return 0;
}
/*
* Halt the sound processor, clear the memory,
* load some default ARM7 code, and then restart ARM7
*/
static void spu_reset(void)
{
unsigned long flags;
spu_disable();
spu_memset(0, 0, 0x200000 / 4);
/* Put ARM7 in endless loop */
local_irq_save(flags);
__raw_writel(0xea000002, SPU_MEMORY_BASE);
local_irq_restore(flags);
spu_enable();
}
static int load_aica_firmware(void)
{
int err;
const struct firmware *fw_entry;
spu_reset();
err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
if (unlikely(err))
return err;
/* write firmware into memory */
spu_disable();
spu_memload(0, fw_entry->data, fw_entry->size);
spu_enable();
release_firmware(fw_entry);
return err;
}
void copy_s3m(char *song, int len) {
spu_disable();
spu_memload(0x10000, song, len);
spu_memload(0, s3mplay, sizeof(s3mplay));
/* Switch channels to mono if uncommented */
/* snd_dbg[1] = 1; */
printf("Load OK, starting ARM\n");
spu_enable();
while(*snd_dbg != 3)
;
while(*snd_dbg == 3)
;
}
