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Diffstat (limited to 'include/asm-powerpc/dbdma.h')
| -rw-r--r-- | include/asm-powerpc/dbdma.h | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/include/asm-powerpc/dbdma.h b/include/asm-powerpc/dbdma.h deleted file mode 100644 index e23f07e..0000000 --- a/include/asm-powerpc/dbdma.h +++ /dev/null @@ -1,108 +0,0 @@ -/* - * Definitions for using the Apple Descriptor-Based DMA controller - * in Power Macintosh computers. - * - * Copyright (C) 1996 Paul Mackerras. - */ - -#ifdef __KERNEL__ -#ifndef _ASM_DBDMA_H_ -#define _ASM_DBDMA_H_ -/* - * DBDMA control/status registers. All little-endian. - */ -struct dbdma_regs { - unsigned int control; /* lets you change bits in status */ - unsigned int status; /* DMA and device status bits (see below) */ - unsigned int cmdptr_hi; /* upper 32 bits of command address */ - unsigned int cmdptr; /* (lower 32 bits of) command address (phys) */ - unsigned int intr_sel; /* select interrupt condition bit */ - unsigned int br_sel; /* select branch condition bit */ - unsigned int wait_sel; /* select wait condition bit */ - unsigned int xfer_mode; - unsigned int data2ptr_hi; - unsigned int data2ptr; - unsigned int res1; - unsigned int address_hi; - unsigned int br_addr_hi; - unsigned int res2[3]; -}; - -/* Bits in control and status registers */ -#define RUN 0x8000 -#define PAUSE 0x4000 -#define FLUSH 0x2000 -#define WAKE 0x1000 -#define DEAD 0x0800 -#define ACTIVE 0x0400 -#define BT 0x0100 -#define DEVSTAT 0x00ff - -/* - * DBDMA command structure. These fields are all little-endian! - */ -struct dbdma_cmd { - unsigned short req_count; /* requested byte transfer count */ - unsigned short command; /* command word (has bit-fields) */ - unsigned int phy_addr; /* physical data address */ - unsigned int cmd_dep; /* command-dependent field */ - unsigned short res_count; /* residual count after completion */ - unsigned short xfer_status; /* transfer status */ -}; - -/* DBDMA command values in command field */ -#define OUTPUT_MORE 0 /* transfer memory data to stream */ -#define OUTPUT_LAST 0x1000 /* ditto followed by end marker */ -#define INPUT_MORE 0x2000 /* transfer stream data to memory */ -#define INPUT_LAST 0x3000 /* ditto, expect end marker */ -#define STORE_WORD 0x4000 /* write word (4 bytes) to device reg */ -#define LOAD_WORD 0x5000 /* read word (4 bytes) from device reg */ -#define DBDMA_NOP 0x6000 /* do nothing */ -#define DBDMA_STOP 0x7000 /* suspend processing */ - -/* Key values in command field */ -#define KEY_STREAM0 0 /* usual data stream */ -#define KEY_STREAM1 0x100 /* control/status stream */ -#define KEY_STREAM2 0x200 /* device-dependent stream */ -#define KEY_STREAM3 0x300 /* device-dependent stream */ -#define KEY_REGS 0x500 /* device register space */ -#define KEY_SYSTEM 0x600 /* system memory-mapped space */ -#define KEY_DEVICE 0x700 /* device memory-mapped space */ - -/* Interrupt control values in command field */ -#define INTR_NEVER 0 /* don't interrupt */ -#define INTR_IFSET 0x10 /* intr if condition bit is 1 */ -#define INTR_IFCLR 0x20 /* intr if condition bit is 0 */ -#define INTR_ALWAYS 0x30 /* always interrupt */ - -/* Branch control values in command field */ -#define BR_NEVER 0 /* don't branch */ -#define BR_IFSET 0x4 /* branch if condition bit is 1 */ -#define BR_IFCLR 0x8 /* branch if condition bit is 0 */ -#define BR_ALWAYS 0xc /* always branch */ - -/* Wait control values in command field */ -#define WAIT_NEVER 0 /* don't wait */ -#define WAIT_IFSET 1 /* wait if condition bit is 1 */ -#define WAIT_IFCLR 2 /* wait if condition bit is 0 */ -#define WAIT_ALWAYS 3 /* always wait */ - -/* Align an address for a DBDMA command structure */ -#define DBDMA_ALIGN(x) (((unsigned long)(x) + sizeof(struct dbdma_cmd) - 1) \ - & -sizeof(struct dbdma_cmd)) - -/* Useful macros */ -#define DBDMA_DO_STOP(regs) do { \ - out_le32(&((regs)->control), (RUN|FLUSH)<<16); \ - while(in_le32(&((regs)->status)) & (ACTIVE|FLUSH)) \ - ; \ -} while(0) - -#define DBDMA_DO_RESET(regs) do { \ - out_le32(&((regs)->control), (ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN)<<16);\ - while(in_le32(&((regs)->status)) & (RUN)) \ - ; \ -} while(0) - -#endif /* _ASM_DBDMA_H_ */ -#endif /* __KERNEL__ */ |
