dma.c File Reference

#include <device/mmio.h>
#include <console/console.h>
#include <stdint.h>
#include <soc/addressmap.h>
#include <soc/dma.h>

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Macros
#define	APB_DMA_OFFSET(n)    (struct apb_dma_channel_regs *)(TEGRA_APB_DMA_BASE + n)

Functions
int	dma_busy (struct apb_dma_channel *const channel)
struct apb_dma_channel *const	dma_claim (void)
void	dma_release (struct apb_dma_channel *const channel)
int	dma_start (struct apb_dma_channel *const channel)
int	dma_stop (struct apb_dma_channel *const channel)

Variables
struct apb_dma *const	apb_dma = (struct apb_dma *)TEGRA_APB_DMA_BASE
struct apb_dma_channel	apb_dma_channels []

Macro Definition Documentation

APB_DMA_OFFSET

#define APB_DMA_OFFSET

(

n

)

(struct apb_dma_channel_regs *)(TEGRA_APB_DMA_BASE + n)

Definition at line 11 of file dma.c.

Function Documentation

dma_busy()

int dma_busy

(

struct apb_dma_channel *const

channel

)

Definition at line 48 of file dma.c.

References APB_STA_DMA_ACTIVITY, read32(), apb_dma_channel::regs, and apb_dma_channel_regs::sta.

Referenced by dma_release(), and tegra_spi_dma_finish().

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dma_claim()

struct apb_dma_channel* const dma_claim

(

void

)

Definition at line 59 of file dma.c.

References APB_COMMAND_GEN, apb_dma_channels, ARRAY_SIZE, BIOS_DEBUG, apb_dma::command, apb_dma_channel::in_use, NULL, printk, read32(), apb_dma_channel::regs, and setbits32.

Referenced by tegra_spi_dma_prepare().

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dma_release()

void dma_release

(

struct apb_dma_channel *const

channel

)

Definition at line 92 of file dma.c.

References APB_COMMAND_GEN, apb_dma_channels, ARRAY_SIZE, clrbits32, apb_dma::command, dma_busy(), and apb_dma_channel::in_use.

Referenced by tegra_spi_dma_finish().

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dma_start()

int dma_start

(

struct apb_dma_channel *const

channel

)

Definition at line 111 of file dma.c.

References APB_CSR_ENB, apb_dma_channel::regs, and setbits32.

Referenced by tegra_spi_dma_start().

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dma_stop()

int dma_stop

(

struct apb_dma_channel *const

channel

)

Definition at line 121 of file dma.c.

References APB_CSR_ENB, clrbits32, and apb_dma_channel::regs.

Referenced by tegra_spi_dma_finish().

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Variable Documentation

apb_dma

struct apb_dma* const apb_dma = (struct apb_dma *)TEGRA_APB_DMA_BASE

Definition at line 9 of file dma.c.

apb_dma_channels

struct apb_dma_channel apb_dma_channels[]

Definition at line 9 of file dma.c.

Referenced by dma_claim(), and dma_release().