mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 14:30:50 +00:00
71b973a42c
This adds DMA support for newer SH-4A CPUs, particularly SH7763/64/80/85. This also enables multi IRQ support for platforms that have multiple vectors bound to the same IRQ source. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
#ifndef __ASM_CPU_SH4_DMA_H
|
|
#define __ASM_CPU_SH4_DMA_H
|
|
|
|
/* SH7751/7760/7780 DMA IRQ sources */
|
|
|
|
#ifdef CONFIG_CPU_SH4A
|
|
|
|
#define DMAOR_INIT (DMAOR_DME)
|
|
#define CHCR_TS_MASK 0x18
|
|
#define CHCR_TS_SHIFT 3
|
|
|
|
#include <cpu/dma-sh4a.h>
|
|
#else /* CONFIG_CPU_SH4A */
|
|
/*
|
|
* SH7750/SH7751/SH7760
|
|
*/
|
|
#define DMTE0_IRQ 34
|
|
#define DMTE4_IRQ 44
|
|
#define DMTE6_IRQ 46
|
|
#define DMAE0_IRQ 38
|
|
|
|
#define DMAOR_INIT (0x8000|DMAOR_DME)
|
|
#define SH_DMAC_BASE0 0xffa00000
|
|
#define SH_DMAC_BASE1 0xffa00070
|
|
/* Definitions for the SuperH DMAC */
|
|
#define TM_BURST 0x00000080
|
|
#define TS_8 0x00000010
|
|
#define TS_16 0x00000020
|
|
#define TS_32 0x00000030
|
|
#define TS_64 0x00000000
|
|
|
|
#define CHCR_TS_MASK 0x70
|
|
#define CHCR_TS_SHIFT 4
|
|
|
|
#define DMAOR_COD 0x00000008
|
|
|
|
/*
|
|
* The SuperH DMAC supports a number of transmit sizes, we list them here,
|
|
* with their respective values as they appear in the CHCR registers.
|
|
*
|
|
* Defaults to a 64-bit transfer size.
|
|
*/
|
|
enum {
|
|
XMIT_SZ_64BIT,
|
|
XMIT_SZ_8BIT,
|
|
XMIT_SZ_16BIT,
|
|
XMIT_SZ_32BIT,
|
|
XMIT_SZ_256BIT,
|
|
};
|
|
|
|
/*
|
|
* The DMA count is defined as the number of bytes to transfer.
|
|
*/
|
|
static unsigned int ts_shift[] __maybe_unused = {
|
|
[XMIT_SZ_64BIT] = 3,
|
|
[XMIT_SZ_8BIT] = 0,
|
|
[XMIT_SZ_16BIT] = 1,
|
|
[XMIT_SZ_32BIT] = 2,
|
|
[XMIT_SZ_256BIT] = 5,
|
|
};
|
|
#endif
|
|
|
|
#endif /* __ASM_CPU_SH4_DMA_H */
|