diff options
Diffstat (limited to 'include/asm-arm/arch-s3c2410/dma.h')
| -rw-r--r-- | include/asm-arm/arch-s3c2410/dma.h | 151 |
1 files changed, 68 insertions, 83 deletions
diff --git a/include/asm-arm/arch-s3c2410/dma.h b/include/asm-arm/arch-s3c2410/dma.h index 72964f9b8414e..3661e465b0a5a 100644 --- a/include/asm-arm/arch-s3c2410/dma.h +++ b/include/asm-arm/arch-s3c2410/dma.h @@ -1,18 +1,13 @@ -/* linux/include/asm-arm/arch-bast/dma.h +/* linux/include/asm-arm/arch-s3c2410/dma.h * - * Copyright (C) 2003,2004 Simtec Electronics + * Copyright (C) 2003,2004,2006 Simtec Electronics * Ben Dooks <ben@simtec.co.uk> * - * Samsung S3C2410X DMA support + * Samsung S3C241XX DMA support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. - * - * Changelog: - * ??-May-2003 BJD Created file - * ??-Jun-2003 BJD Added more dma functionality to go with arch - * 10-Nov-2004 BJD Added sys_device support */ #ifndef __ASM_ARCH_DMA_H @@ -21,28 +16,26 @@ #include <linux/sysdev.h> #include "hardware.h" - /* * This is the maximum DMA address(physical address) that can be DMAd to. * */ -#define MAX_DMA_ADDRESS 0x20000000 +#define MAX_DMA_ADDRESS 0x40000000 #define MAX_DMA_TRANSFER_SIZE 0x100000 /* Data Unit is half word */ - /* we have 4 dma channels */ #define S3C2410_DMA_CHANNELS (4) /* types */ -typedef enum { +enum s3c2410_dma_state { S3C2410_DMA_IDLE, S3C2410_DMA_RUNNING, S3C2410_DMA_PAUSED -} s3c2410_dma_state_t; +}; -/* s3c2410_dma_loadst_t +/* enum s3c2410_dma_loadst * * This represents the state of the DMA engine, wrt to the loaded / running * transfers. Since we don't have any way of knowing exactly the state of @@ -70,44 +63,40 @@ typedef enum { * currently running. */ -typedef enum { +enum s3c2410_dma_loadst { S3C2410_DMALOAD_NONE, S3C2410_DMALOAD_1LOADED, S3C2410_DMALOAD_1RUNNING, S3C2410_DMALOAD_1LOADED_1RUNNING, -} s3c2410_dma_loadst_t; +}; -typedef enum { +enum s3c2410_dma_buffresult { S3C2410_RES_OK, S3C2410_RES_ERR, S3C2410_RES_ABORT -} s3c2410_dma_buffresult_t; - - -typedef enum s3c2410_dmasrc_e s3c2410_dmasrc_t; +}; -enum s3c2410_dmasrc_e { - S3C2410_DMASRC_HW, /* source is memory */ - S3C2410_DMASRC_MEM /* source is hardware */ +enum s3c2410_dmasrc { + S3C2410_DMASRC_HW, /* source is memory */ + S3C2410_DMASRC_MEM /* source is hardware */ }; -/* enum s3c2410_chan_op_e +/* enum s3c2410_chan_op * * operation codes passed to the DMA code by the user, and also used * to inform the current channel owner of any changes to the system state */ -enum s3c2410_chan_op_e { +enum s3c2410_chan_op { S3C2410_DMAOP_START, S3C2410_DMAOP_STOP, S3C2410_DMAOP_PAUSE, S3C2410_DMAOP_RESUME, S3C2410_DMAOP_FLUSH, - S3C2410_DMAOP_TIMEOUT, /* internal signal to handler */ + S3C2410_DMAOP_TIMEOUT, /* internal signal to handler */ + S3C2410_DMAOP_STARTED, /* indicate channel started */ }; -typedef enum s3c2410_chan_op_e s3c2410_chan_op_t; - /* flags */ #define S3C2410_DMAF_SLOW (1<<0) /* slow, so don't worry about @@ -116,104 +105,100 @@ typedef enum s3c2410_chan_op_e s3c2410_chan_op_t; /* dma buffer */ -typedef struct s3c2410_dma_buf_s s3c2410_dma_buf_t; - struct s3c2410_dma_client { char *name; }; -typedef struct s3c2410_dma_client s3c2410_dma_client_t; - /* s3c2410_dma_buf_s * * internally used buffer structure to describe a queued or running * buffer. */ -struct s3c2410_dma_buf_s { - s3c2410_dma_buf_t *next; - int magic; /* magic */ - int size; /* buffer size in bytes */ - dma_addr_t data; /* start of DMA data */ - dma_addr_t ptr; /* where the DMA got to [1] */ - void *id; /* client's id */ +struct s3c2410_dma_buf; +struct s3c2410_dma_buf { + struct s3c2410_dma_buf *next; + int magic; /* magic */ + int size; /* buffer size in bytes */ + dma_addr_t data; /* start of DMA data */ + dma_addr_t ptr; /* where the DMA got to [1] */ + void *id; /* client's id */ }; /* [1] is this updated for both recv/send modes? */ -typedef struct s3c2410_dma_chan_s s3c2410_dma_chan_t; +struct s3c2410_dma_chan; /* s3c2410_dma_cbfn_t * * buffer callback routine type */ -typedef void (*s3c2410_dma_cbfn_t)(s3c2410_dma_chan_t *, void *buf, int size, - s3c2410_dma_buffresult_t result); +typedef void (*s3c2410_dma_cbfn_t)(struct s3c2410_dma_chan *, + void *buf, int size, + enum s3c2410_dma_buffresult result); -typedef int (*s3c2410_dma_opfn_t)(s3c2410_dma_chan_t *, - s3c2410_chan_op_t ); +typedef int (*s3c2410_dma_opfn_t)(struct s3c2410_dma_chan *, + enum s3c2410_chan_op ); -struct s3c2410_dma_stats_s { - unsigned long loads; - unsigned long timeout_longest; - unsigned long timeout_shortest; - unsigned long timeout_avg; - unsigned long timeout_failed; +struct s3c2410_dma_stats { + unsigned long loads; + unsigned long timeout_longest; + unsigned long timeout_shortest; + unsigned long timeout_avg; + unsigned long timeout_failed; }; -typedef struct s3c2410_dma_stats_s s3c2410_dma_stats_t; - -/* struct s3c2410_dma_chan_s +/* struct s3c2410_dma_chan * * full state information for each DMA channel */ -struct s3c2410_dma_chan_s { +struct s3c2410_dma_chan { /* channel state flags and information */ - unsigned char number; /* number of this dma channel */ - unsigned char in_use; /* channel allocated */ - unsigned char irq_claimed; /* irq claimed for channel */ - unsigned char irq_enabled; /* irq enabled for channel */ - unsigned char xfer_unit; /* size of an transfer */ + unsigned char number; /* number of this dma channel */ + unsigned char in_use; /* channel allocated */ + unsigned char irq_claimed; /* irq claimed for channel */ + unsigned char irq_enabled; /* irq enabled for channel */ + unsigned char xfer_unit; /* size of an transfer */ /* channel state */ - s3c2410_dma_state_t state; - s3c2410_dma_loadst_t load_state; - s3c2410_dma_client_t *client; + enum s3c2410_dma_state state; + enum s3c2410_dma_loadst load_state; + struct s3c2410_dma_client *client; /* channel configuration */ - s3c2410_dmasrc_t source; - unsigned long dev_addr; - unsigned long load_timeout; - unsigned int flags; /* channel flags */ + enum s3c2410_dmasrc source; + unsigned long dev_addr; + unsigned long load_timeout; + unsigned int flags; /* channel flags */ /* channel's hardware position and configuration */ - void __iomem *regs; /* channels registers */ - void __iomem *addr_reg; /* data address register */ - unsigned int irq; /* channel irq */ - unsigned long dcon; /* default value of DCON */ + void __iomem *regs; /* channels registers */ + void __iomem *addr_reg; /* data address register */ + unsigned int irq; /* channel irq */ + unsigned long dcon; /* default value of DCON */ /* driver handles */ - s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */ - s3c2410_dma_opfn_t op_fn; /* channel operation callback */ + s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */ + s3c2410_dma_opfn_t op_fn; /* channel op callback */ /* stats gathering */ - s3c2410_dma_stats_t *stats; - s3c2410_dma_stats_t stats_store; + struct s3c2410_dma_stats *stats; + struct s3c2410_dma_stats stats_store; /* buffer list and information */ - s3c2410_dma_buf_t *curr; /* current dma buffer */ - s3c2410_dma_buf_t *next; /* next buffer to load */ - s3c2410_dma_buf_t *end; /* end of queue */ + struct s3c2410_dma_buf *curr; /* current dma buffer */ + struct s3c2410_dma_buf *next; /* next buffer to load */ + struct s3c2410_dma_buf *end; /* end of queue */ /* system device */ struct sys_device dev; }; /* the currently allocated channel information */ -extern s3c2410_dma_chan_t s3c2410_chans[]; +extern struct s3c2410_dma_chan s3c2410_chans[]; /* note, we don't really use dma_device_t at the moment */ typedef unsigned long dma_device_t; @@ -226,7 +211,7 @@ typedef unsigned long dma_device_t; */ extern int s3c2410_dma_request(dmach_t channel, - s3c2410_dma_client_t *, void *dev); + struct s3c2410_dma_client *, void *dev); /* s3c2410_dma_ctrl @@ -234,7 +219,7 @@ extern int s3c2410_dma_request(dmach_t channel, * change the state of the dma channel */ -extern int s3c2410_dma_ctrl(dmach_t channel, s3c2410_chan_op_t op); +extern int s3c2410_dma_ctrl(dmach_t channel, enum s3c2410_chan_op op); /* s3c2410_dma_setflags * @@ -249,7 +234,7 @@ extern int s3c2410_dma_setflags(dmach_t channel, * free the dma channel (will also abort any outstanding operations) */ -extern int s3c2410_dma_free(dmach_t channel, s3c2410_dma_client_t *); +extern int s3c2410_dma_free(dmach_t channel, struct s3c2410_dma_client *); /* s3c2410_dma_enqueue * @@ -273,7 +258,7 @@ extern int s3c2410_dma_config(dmach_t channel, int xferunit, int dcon); * configure the device we're talking to */ -extern int s3c2410_dma_devconfig(int channel, s3c2410_dmasrc_t source, +extern int s3c2410_dma_devconfig(int channel, enum s3c2410_dmasrc source, int hwcfg, unsigned long devaddr); /* s3c2410_dma_getposition |