diff options
Diffstat (limited to 'arch/arm/plat-stmp3xxx/include/mach/dma.h')
| -rw-r--r-- | arch/arm/plat-stmp3xxx/include/mach/dma.h | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/arch/arm/plat-stmp3xxx/include/mach/dma.h b/arch/arm/plat-stmp3xxx/include/mach/dma.h deleted file mode 100644 index 7c58557c676..00000000000 --- a/arch/arm/plat-stmp3xxx/include/mach/dma.h +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Freescale STMP37XX/STMP378X DMA helper interface - * - * Embedded Alley Solutions, Inc <source@embeddedalley.com> - * - * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. - * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. - */ - -/* - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html - */ -#ifndef __ASM_PLAT_STMP3XXX_DMA_H -#define __ASM_PLAT_STMP3XXX_DMA_H - -#include <linux/platform_device.h> -#include <linux/dmapool.h> - -#if !defined(MAX_PIO_WORDS) -#define MAX_PIO_WORDS (15) -#endif - -#define STMP3XXX_BUS_APBH 0 -#define STMP3XXX_BUS_APBX 1 -#define STMP3XXX_DMA_MAX_CHANNEL 16 -#define STMP3XXX_DMA_BUS(dma) ((dma) / 16) -#define STMP3XXX_DMA_CHANNEL(dma) ((dma) % 16) -#define STMP3XXX_DMA(channel, bus) ((bus) * 16 + (channel)) -#define MAX_DMA_ADDRESS 0xffffffff -#define MAX_DMA_CHANNELS 32 - -struct stmp3xxx_dma_command { - u32 next; - u32 cmd; - union { - u32 buf_ptr; - u32 alternate; - }; - u32 pio_words[MAX_PIO_WORDS]; -}; - -struct stmp3xxx_dma_descriptor { - struct stmp3xxx_dma_command *command; - dma_addr_t handle; - - /* The virtual address of the buffer pointer */ - void *virtual_buf_ptr; - /* The next descriptor in a the DMA chain (optional) */ - struct stmp3xxx_dma_descriptor *next_descr; -}; - -struct stmp37xx_circ_dma_chain { - unsigned total_count; - struct stmp3xxx_dma_descriptor *chain; - - unsigned free_index; - unsigned free_count; - unsigned active_index; - unsigned active_count; - unsigned cooked_index; - unsigned cooked_count; - - int bus; - unsigned channel; -}; - -static inline struct stmp3xxx_dma_descriptor - *stmp3xxx_dma_circ_get_free_head(struct stmp37xx_circ_dma_chain *chain) -{ - return &(chain->chain[chain->free_index]); -} - -static inline struct stmp3xxx_dma_descriptor - *stmp3xxx_dma_circ_get_cooked_head(struct stmp37xx_circ_dma_chain *chain) -{ - return &(chain->chain[chain->cooked_index]); -} - -int stmp3xxx_dma_request(int ch, struct device *dev, const char *name); -int stmp3xxx_dma_release(int ch); -int stmp3xxx_dma_allocate_command(int ch, - struct stmp3xxx_dma_descriptor *descriptor); -int stmp3xxx_dma_free_command(int ch, - struct stmp3xxx_dma_descriptor *descriptor); -void stmp3xxx_dma_continue(int channel, u32 semaphore); -void stmp3xxx_dma_go(int ch, struct stmp3xxx_dma_descriptor *head, - u32 semaphore); -int stmp3xxx_dma_running(int ch); -int stmp3xxx_dma_make_chain(int ch, struct stmp37xx_circ_dma_chain *chain, - struct stmp3xxx_dma_descriptor descriptors[], - unsigned items); -void stmp3xxx_dma_free_chain(struct stmp37xx_circ_dma_chain *chain); -void stmp37xx_circ_clear_chain(struct stmp37xx_circ_dma_chain *chain); -void stmp37xx_circ_advance_free(struct stmp37xx_circ_dma_chain *chain, - unsigned count); -void stmp37xx_circ_advance_active(struct stmp37xx_circ_dma_chain *chain, - unsigned count); -unsigned stmp37xx_circ_advance_cooked(struct stmp37xx_circ_dma_chain *chain); -int stmp3xxx_dma_read_semaphore(int ch); -void stmp3xxx_dma_init(void); -void stmp3xxx_dma_set_alt_target(int ch, int target); -void stmp3xxx_dma_suspend(void); -void stmp3xxx_dma_resume(void); - -/* - * STMP37xx and STMP378x have different DMA control - * registers layout - */ - -void stmp3xxx_arch_dma_freeze(int ch); -void stmp3xxx_arch_dma_unfreeze(int ch); -void stmp3xxx_arch_dma_reset_channel(int ch); -void stmp3xxx_arch_dma_enable_interrupt(int ch); -void stmp3xxx_arch_dma_clear_interrupt(int ch); -int stmp3xxx_arch_dma_is_interrupt(int ch); - -static inline void stmp3xxx_dma_reset_channel(int ch) -{ - stmp3xxx_arch_dma_reset_channel(ch); -} - - -static inline void stmp3xxx_dma_freeze(int ch) -{ - stmp3xxx_arch_dma_freeze(ch); -} - -static inline void stmp3xxx_dma_unfreeze(int ch) -{ - stmp3xxx_arch_dma_unfreeze(ch); -} - -static inline void stmp3xxx_dma_enable_interrupt(int ch) -{ - stmp3xxx_arch_dma_enable_interrupt(ch); -} - -static inline void stmp3xxx_dma_clear_interrupt(int ch) -{ - stmp3xxx_arch_dma_clear_interrupt(ch); -} - -static inline int stmp3xxx_dma_is_interrupt(int ch) -{ - return stmp3xxx_arch_dma_is_interrupt(ch); -} - -#endif /* __ASM_PLAT_STMP3XXX_DMA_H */ |