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[ARM] pxa: introduce plat-pxa for PXA common code and add DMA support 

1. introduce folder of 'arch/arm/plat-pxa' for common code across different
   PXA processor families

2. initially moved DMA code into plat-pxa

3. common code in <mach/dma.h> moved into <plat/dma.h>, new processors
   should implement its own <mach/dma.h>, provide the following required
   definitions and '#include <plat/dma.h>' in the end:

   - DMAC_REGS_VIRT for mapped virtual address of the DMA registers'
     physical I/O memory

Signed-off-by: Eric Miao <eric.miao@marvell.com>
hifive-unleashed-5.1
Eric Miao 2009-01-20 12:06:01 +08:00
parent e2bb5befd7
commit bd5ce43323
8 changed files with 105 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/Kconfig
View File

@ -481,6 +481,7 @@ config ARCH_PXA
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
select TICK_ONESHOT
select PLAT_PXA
help
Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
@ -618,6 +619,7 @@ source "arch/arm/mach-loki/Kconfig"
source "arch/arm/mach-mv78xx0/Kconfig"
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
source "arch/arm/mach-sa1100/Kconfig"
@ -687,6 +689,9 @@ config PLAT_IOP
config PLAT_ORION
bool
config PLAT_PXA
bool
source arch/arm/mm/Kconfig
config IWMMXT

1
arch/arm/Makefile
View File

@ -109,6 +109,7 @@ ifeq ($(CONFIG_ARCH_SA1100),y)
textofs-$(CONFIG_SA1111) := 0x00208000
endif
machine-$(CONFIG_ARCH_PXA) := pxa
plat-$(CONFIG_PLAT_PXA) := pxa
machine-$(CONFIG_ARCH_L7200) := l7200
machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
textofs-$(CONFIG_ARCH_CLPS711X) := 0x00028000

2
arch/arm/mach-pxa/Makefile
View File

@ -3,7 +3,7 @@
#
# Common support (must be linked before board specific support)
obj-y += clock.o devices.o generic.o irq.o dma.o \
obj-y += clock.o devices.o generic.o irq.o \
time.o gpio.o reset.o
obj-$(CONFIG_PM) += pm.o sleep.o standby.o

83
arch/arm/mach-pxa/include/mach/dma.h
View File

@ -16,87 +16,6 @@
/* DMA Controller Registers Definitions */
#define DMAC_REGS_VIRT io_p2v(0x40000000)
#define DMAC_REG(x) (*((volatile u32 *)(DMAC_REGS_VIRT + (x))))
#define DCSR(n) DMAC_REG((n) << 2)
#define DALGN DMAC_REG(0x00a0) /* DMA Alignment Register */
#define DINT DMAC_REG(0x00f0) /* DMA Interrupt Register */
#define DDADR(n) DMAC_REG(0x0200 + ((n) << 4))
#define DSADR(n) DMAC_REG(0x0204 + ((n) << 4))
#define DTADR(n) DMAC_REG(0x0208 + ((n) << 4))
#define DCMD(n) DMAC_REG(0x020c + ((n) << 4))
#define DRCMR(n) DMAC_REG((((n) < 64) ? 0x0100 : 0x1100) + \
(((n) & 0x3f) << 2))
#define DCSR_RUN (1 << 31) /* Run Bit (read / write) */
#define DCSR_NODESC (1 << 30) /* No-Descriptor Fetch (read / write) */
#define DCSR_STOPIRQEN (1 << 29) /* Stop Interrupt Enable (read / write) */
#define DCSR_REQPEND (1 << 8) /* Request Pending (read-only) */
#define DCSR_STOPSTATE (1 << 3) /* Stop State (read-only) */
#define DCSR_ENDINTR (1 << 2) /* End Interrupt (read / write) */
#define DCSR_STARTINTR (1 << 1) /* Start Interrupt (read / write) */
#define DCSR_BUSERR (1 << 0) /* Bus Error Interrupt (read / write) */
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
#define DCSR_EORIRQEN (1 << 28) /* End of Receive Interrupt Enable (R/W) */
#define DCSR_EORJMPEN (1 << 27) /* Jump to next descriptor on EOR */
#define DCSR_EORSTOPEN (1 << 26) /* STOP on an EOR */
#define DCSR_SETCMPST (1 << 25) /* Set Descriptor Compare Status */
#define DCSR_CLRCMPST (1 << 24) /* Clear Descriptor Compare Status */
#define DCSR_CMPST (1 << 10) /* The Descriptor Compare Status */
#define DCSR_EORINTR (1 << 9) /* The end of Receive */
#endif
#define DRCMR_MAPVLD (1 << 7) /* Map Valid (read / write) */
#define DRCMR_CHLNUM 0x1f /* mask for Channel Number (read / write) */
#define DDADR_DESCADDR 0xfffffff0 /* Address of next descriptor (mask) */
#define DDADR_STOP (1 << 0) /* Stop (read / write) */
#define DCMD_INCSRCADDR (1 << 31) /* Source Address Increment Setting. */
#define DCMD_INCTRGADDR (1 << 30) /* Target Address Increment Setting. */
#define DCMD_FLOWSRC (1 << 29) /* Flow Control by the source. */
#define DCMD_FLOWTRG (1 << 28) /* Flow Control by the target. */
#define DCMD_STARTIRQEN (1 << 22) /* Start Interrupt Enable */
#define DCMD_ENDIRQEN (1 << 21) /* End Interrupt Enable */
#define DCMD_ENDIAN (1 << 18) /* Device Endian-ness. */
#define DCMD_BURST8 (1 << 16) /* 8 byte burst */
#define DCMD_BURST16 (2 << 16) /* 16 byte burst */
#define DCMD_BURST32 (3 << 16) /* 32 byte burst */
#define DCMD_WIDTH1 (1 << 14) /* 1 byte width */
#define DCMD_WIDTH2 (2 << 14) /* 2 byte width (HalfWord) */
#define DCMD_WIDTH4 (3 << 14) /* 4 byte width (Word) */
#define DCMD_LENGTH 0x01fff /* length mask (max = 8K - 1) */
/*
* Descriptor structure for PXA's DMA engine
* Note: this structure must always be aligned to a 16-byte boundary.
*/
typedef struct pxa_dma_desc {
volatile u32 ddadr; /* Points to the next descriptor + flags */
volatile u32 dsadr; /* DSADR value for the current transfer */
volatile u32 dtadr; /* DTADR value for the current transfer */
volatile u32 dcmd; /* DCMD value for the current transfer */
} pxa_dma_desc;
typedef enum {
DMA_PRIO_HIGH = 0,
DMA_PRIO_MEDIUM = 1,
DMA_PRIO_LOW = 2
} pxa_dma_prio;
/*
* DMA registration
*/
int __init pxa_init_dma(int irq, int num_ch);
int pxa_request_dma (char *name,
pxa_dma_prio prio,
void (*irq_handler)(int, void *),
void *data);
void pxa_free_dma (int dma_ch);
#include <plat/dma.h>
#endif /* _ASM_ARCH_DMA_H */

3
arch/arm/plat-pxa/Kconfig 100644
View File

@ -0,0 +1,3 @@
if PLAT_PXA
endif

6
arch/arm/plat-pxa/Makefile 100644
View File

@ -0,0 +1,6 @@
#
# Makefile for code common across different PXA processor families
#
obj-y := dma.o

6
arch/arm/mach-pxa/dma.c → arch/arm/plat-pxa/dma.c
View File

@ -1,5 +1,5 @@
/*
* linux/arch/arm/mach-pxa/dma.c
* linux/arch/arm/plat-pxa/dma.c
*
* PXA DMA registration and IRQ dispatching
*
@ -34,8 +34,8 @@ static struct dma_channel *dma_channels;
static int num_dma_channels;
int pxa_request_dma (char *name, pxa_dma_prio prio,
void (*irq_handler)(int, void *),
void *data)
void (*irq_handler)(int, void *),
void *data)
{
unsigned long flags;
int i, found = 0;

85
arch/arm/plat-pxa/include/plat/dma.h 100644
View File

@ -0,0 +1,85 @@
#ifndef __PLAT_DMA_H
#define __PLAT_DMA_H
#define DMAC_REG(x) (*((volatile u32 *)(DMAC_REGS_VIRT + (x))))
#define DCSR(n) DMAC_REG((n) << 2)
#define DALGN DMAC_REG(0x00a0) /* DMA Alignment Register */
#define DINT DMAC_REG(0x00f0) /* DMA Interrupt Register */
#define DDADR(n) DMAC_REG(0x0200 + ((n) << 4))
#define DSADR(n) DMAC_REG(0x0204 + ((n) << 4))
#define DTADR(n) DMAC_REG(0x0208 + ((n) << 4))
#define DCMD(n) DMAC_REG(0x020c + ((n) << 4))
#define DRCMR(n) DMAC_REG((((n) < 64) ? 0x0100 : 0x1100) + \
(((n) & 0x3f) << 2))
#define DCSR_RUN (1 << 31) /* Run Bit (read / write) */
#define DCSR_NODESC (1 << 30) /* No-Descriptor Fetch (read / write) */
#define DCSR_STOPIRQEN (1 << 29) /* Stop Interrupt Enable (read / write) */
#define DCSR_REQPEND (1 << 8) /* Request Pending (read-only) */
#define DCSR_STOPSTATE (1 << 3) /* Stop State (read-only) */
#define DCSR_ENDINTR (1 << 2) /* End Interrupt (read / write) */
#define DCSR_STARTINTR (1 << 1) /* Start Interrupt (read / write) */
#define DCSR_BUSERR (1 << 0) /* Bus Error Interrupt (read / write) */
#define DCSR_EORIRQEN (1 << 28) /* End of Receive Interrupt Enable (R/W) */
#define DCSR_EORJMPEN (1 << 27) /* Jump to next descriptor on EOR */
#define DCSR_EORSTOPEN (1 << 26) /* STOP on an EOR */
#define DCSR_SETCMPST (1 << 25) /* Set Descriptor Compare Status */
#define DCSR_CLRCMPST (1 << 24) /* Clear Descriptor Compare Status */
#define DCSR_CMPST (1 << 10) /* The Descriptor Compare Status */
#define DCSR_EORINTR (1 << 9) /* The end of Receive */
#define DRCMR_MAPVLD (1 << 7) /* Map Valid (read / write) */
#define DRCMR_CHLNUM 0x1f /* mask for Channel Number (read / write) */
#define DDADR_DESCADDR 0xfffffff0 /* Address of next descriptor (mask) */
#define DDADR_STOP (1 << 0) /* Stop (read / write) */
#define DCMD_INCSRCADDR (1 << 31) /* Source Address Increment Setting. */
#define DCMD_INCTRGADDR (1 << 30) /* Target Address Increment Setting. */
#define DCMD_FLOWSRC (1 << 29) /* Flow Control by the source. */
#define DCMD_FLOWTRG (1 << 28) /* Flow Control by the target. */
#define DCMD_STARTIRQEN (1 << 22) /* Start Interrupt Enable */
#define DCMD_ENDIRQEN (1 << 21) /* End Interrupt Enable */
#define DCMD_ENDIAN (1 << 18) /* Device Endian-ness. */
#define DCMD_BURST8 (1 << 16) /* 8 byte burst */
#define DCMD_BURST16 (2 << 16) /* 16 byte burst */
#define DCMD_BURST32 (3 << 16) /* 32 byte burst */
#define DCMD_WIDTH1 (1 << 14) /* 1 byte width */
#define DCMD_WIDTH2 (2 << 14) /* 2 byte width (HalfWord) */
#define DCMD_WIDTH4 (3 << 14) /* 4 byte width (Word) */
#define DCMD_LENGTH 0x01fff /* length mask (max = 8K - 1) */
/*
* Descriptor structure for PXA's DMA engine
* Note: this structure must always be aligned to a 16-byte boundary.
*/
typedef struct pxa_dma_desc {
volatile u32 ddadr; /* Points to the next descriptor + flags */
volatile u32 dsadr; /* DSADR value for the current transfer */
volatile u32 dtadr; /* DTADR value for the current transfer */
volatile u32 dcmd; /* DCMD value for the current transfer */
} pxa_dma_desc;
typedef enum {
DMA_PRIO_HIGH = 0,
DMA_PRIO_MEDIUM = 1,
DMA_PRIO_LOW = 2
} pxa_dma_prio;
/*
* DMA registration
*/
int __init pxa_init_dma(int irq, int num_ch);
int pxa_request_dma (char *name,
pxa_dma_prio prio,
void (*irq_handler)(int, void *),
void *data);
void pxa_free_dma (int dma_ch);
#endif /* __PLAT_DMA_H */