diff options
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/target/arm/imx31/gigabeat-s/pcm-imx31.c | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/firmware/target/arm/imx31/gigabeat-s/pcm-imx31.c b/firmware/target/arm/imx31/gigabeat-s/pcm-imx31.c index c29c4b2930..b62051e41d 100644 --- a/firmware/target/arm/imx31/gigabeat-s/pcm-imx31.c +++ b/firmware/target/arm/imx31/gigabeat-s/pcm-imx31.c @@ -29,66 +29,24 @@ static int pcm_freq = HW_SAMPR_DEFAULT; /* 44.1 is default */ void fiq_handler(void) __attribute__((naked)); -/* Implement separately on recording and playback - simply disable the - specific DMA interrupt. Disable the FIQ itself only temporarily to sync - with the DMA interrupt and restore its previous state. The pcm routines - will call the lockout first then call into these low-level routines. */ -struct dma_lock -{ - int locked; - unsigned long state; -}; - -static struct dma_play_lock = -{ - .locked = 0, - .state = 0, /* Initialize this as disabled */ -}; - void pcm_play_lock(void) { - int status = set_fiq_status(FIQ_DISABLED); - if (++dma_play_lock.locked == 1) - ; /* Mask the DMA interrupt */ - set_fiq_status(status); } void pcm_play_unlock(void) { - int status = set_fiq_status(FIQ_DISABLED); - if (--dma_play_lock.locked == 0) - ; /* Unmask the DMA interrupt if enabled */ - set_fiq_status(status); } static void _pcm_apply_settings(void) { - if (pcm_freq != pcm_curr_sampr) - { - pcm_curr_sampr = pcm_freq; - /* Change hardware sample rate */ - /* */ - } } void pcm_apply_settings(void) { - /* Lockout FIQ and sync the hardware to the settings */ - int oldstatus = set_fiq_status(FIQ_DISABLED); - _pcm_apply_settings(); - set_fiq_status(oldstatus); } void pcm_play_dma_init(void) { - pcm_set_frequency(SAMPR_44); - -#if 0 - /* Do basic init enable output in pcm_postinit if popping is a - problem at boot to enable a lenghy delay and let the boot - process continue */ - audiohw_init(); -#endif } void pcm_postinit(void) @@ -98,19 +56,11 @@ void pcm_postinit(void) /* Connect the DMA and start filling the FIFO */ static void play_start_pcm(void) { -#if 0 - /* unmask DMA interrupt when unlocking */ - dma_play_lock.state = 0; /* Set to allow pcm_play_unlock to unmask interrupt */ -#endif } /* Disconnect the DMA and wait for the FIFO to clear */ static void play_stop_pcm(void) { -#if 0 - /* Keep interrupt masked when unlocking */ - dma_play_lock.state = 0; /* Set to keep pcm_play_unlock from unmasking interrupt */ -#endif } void pcm_play_dma_start(const void *addr, size_t size) @@ -121,30 +71,16 @@ void pcm_play_dma_start(const void *addr, size_t size) void pcm_play_dma_stop(void) { - play_stop_pcm(); } void pcm_play_dma_pause(bool pause) { - if (pause) - { - play_stop_pcm(); - } - else - { - play_start_pcm(); - } } /* Get more samples to play out - call pcm_play_dma_stop and pcm_play_dma_stopped_callback if the data runs out */ void fiq_handler(void) { -#if 0 - /* Callback missing or no more DMA to do */ - pcm_play_dma_stop(); - pcm_play_dma_stopped_callback(); -#endif } /* Set the pcm frequency hardware will use when play is next started or @@ -152,7 +88,6 @@ void fiq_handler(void) hardware here but simply cache it. */ void pcm_set_frequency(unsigned int frequency) { - pcm_freq = frequency; } /* Return the number of bytes waiting - full L-R sample pairs only */ |