diff options
Diffstat (limited to 'arch/blackfin/include/asm/dma.h')
-rw-r--r-- | arch/blackfin/include/asm/dma.h | 156 |
1 files changed, 116 insertions, 40 deletions
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h index 4928e7a..690c25f 100644 --- a/arch/blackfin/include/asm/dma.h +++ b/arch/blackfin/include/asm/dma.h @@ -129,50 +129,126 @@ void blackfin_dma_resume(void); /******************************************************************************* * DMA API's *******************************************************************************/ -/* functions to set register mode */ -void set_dma_start_addr(unsigned int channel, unsigned long addr); -void set_dma_next_desc_addr(unsigned int channel, unsigned long addr); -void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr); -void set_dma_x_count(unsigned int channel, unsigned short x_count); -void set_dma_x_modify(unsigned int channel, short x_modify); -void set_dma_y_count(unsigned int channel, unsigned short y_count); -void set_dma_y_modify(unsigned int channel, short y_modify); -void set_dma_config(unsigned int channel, unsigned short config); -unsigned short set_bfin_dma_config(char direction, char flow_mode, - char intr_mode, char dma_mode, char width, - char syncmode); -void set_dma_curr_addr(unsigned int channel, unsigned long addr); - -/* get curr status for polling */ -unsigned short get_dma_curr_irqstat(unsigned int channel); -unsigned short get_dma_curr_xcount(unsigned int channel); -unsigned short get_dma_curr_ycount(unsigned int channel); -unsigned long get_dma_next_desc_ptr(unsigned int channel); -unsigned long get_dma_curr_desc_ptr(unsigned int channel); -unsigned long get_dma_curr_addr(unsigned int channel); - -/* set large DMA mode descriptor */ -void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg); - -/* check if current channel is in use */ -int dma_channel_active(unsigned int channel); - -/* common functions must be called in any mode */ +extern struct dma_channel dma_ch[MAX_DMA_CHANNELS]; +extern struct dma_register *dma_io_base_addr[MAX_DMA_CHANNELS]; +extern int channel2irq(unsigned int channel); + +static inline void set_dma_start_addr(unsigned int channel, unsigned long addr) +{ + dma_ch[channel].regs->start_addr = addr; +} +static inline void set_dma_next_desc_addr(unsigned int channel, unsigned long addr) +{ + dma_ch[channel].regs->next_desc_ptr = addr; +} +static inline void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr) +{ + dma_ch[channel].regs->curr_desc_ptr = addr; +} +static inline void set_dma_x_count(unsigned int channel, unsigned short x_count) +{ + dma_ch[channel].regs->x_count = x_count; +} +static inline void set_dma_y_count(unsigned int channel, unsigned short y_count) +{ + dma_ch[channel].regs->y_count = y_count; +} +static inline void set_dma_x_modify(unsigned int channel, short x_modify) +{ + dma_ch[channel].regs->x_modify = x_modify; +} +static inline void set_dma_y_modify(unsigned int channel, short y_modify) +{ + dma_ch[channel].regs->y_modify = y_modify; +} +static inline void set_dma_config(unsigned int channel, unsigned short config) +{ + dma_ch[channel].regs->cfg = config; +} +static inline void set_dma_curr_addr(unsigned int channel, unsigned long addr) +{ + dma_ch[channel].regs->curr_addr_ptr = addr; +} + +static inline unsigned short +set_bfin_dma_config(char direction, char flow_mode, + char intr_mode, char dma_mode, char width, char syncmode) +{ + return (direction << 1) | (width << 2) | (dma_mode << 4) | + (intr_mode << 6) | (flow_mode << 12) | (syncmode << 5); +} + +static inline unsigned short get_dma_curr_irqstat(unsigned int channel) +{ + return dma_ch[channel].regs->irq_status; +} +static inline unsigned short get_dma_curr_xcount(unsigned int channel) +{ + return dma_ch[channel].regs->curr_x_count; +} +static inline unsigned short get_dma_curr_ycount(unsigned int channel) +{ + return dma_ch[channel].regs->curr_y_count; +} +static inline unsigned long get_dma_next_desc_ptr(unsigned int channel) +{ + return dma_ch[channel].regs->next_desc_ptr; +} +static inline unsigned long get_dma_curr_desc_ptr(unsigned int channel) +{ + return dma_ch[channel].regs->curr_desc_ptr; +} +static inline unsigned long get_dma_curr_addr(unsigned int channel) +{ + return dma_ch[channel].regs->curr_addr_ptr; +} + +static inline void set_dma_sg(unsigned int channel, struct dmasg *sg, int ndsize) +{ + dma_ch[channel].regs->cfg |= ((ndsize & 0x0F) << 8); + dma_ch[channel].regs->next_desc_ptr = (unsigned long)sg; +} + +static inline int dma_channel_active(unsigned int channel) +{ + if (dma_ch[channel].chan_status == DMA_CHANNEL_FREE) + return 0; + else + return 1; +} + +static inline void disable_dma(unsigned int channel) +{ + dma_ch[channel].regs->cfg &= ~DMAEN; + SSYNC(); + dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED; +} +static inline void enable_dma(unsigned int channel) +{ + dma_ch[channel].regs->curr_x_count = 0; + dma_ch[channel].regs->curr_y_count = 0; + dma_ch[channel].regs->cfg |= DMAEN; + dma_ch[channel].chan_status = DMA_CHANNEL_ENABLED; +} void free_dma(unsigned int channel); -int dma_channel_active(unsigned int channel); /* check if a channel is in use */ -void disable_dma(unsigned int channel); -void enable_dma(unsigned int channel); int request_dma(unsigned int channel, const char *device_id); -int set_dma_callback(unsigned int channel, irq_handler_t callback, - void *data); -void dma_disable_irq(unsigned int channel); -void dma_enable_irq(unsigned int channel); -void clear_dma_irqstat(unsigned int channel); +int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data); + +static inline void dma_disable_irq(unsigned int channel) +{ + disable_irq(dma_ch[channel].irq); +} +static inline void dma_enable_irq(unsigned int channel) +{ + enable_irq(dma_ch[channel].irq); +} +static inline void clear_dma_irqstat(unsigned int channel) +{ + dma_ch[channel].regs->irq_status = DMA_DONE | DMA_ERR; +} + void *dma_memcpy(void *dest, const void *src, size_t count); void *safe_dma_memcpy(void *dest, const void *src, size_t count); void blackfin_dma_early_init(void); -extern int channel2irq(unsigned int channel); -extern struct dma_register *dma_io_base_addr[MAX_DMA_CHANNELS]; - #endif |