[linux-2.6-block.git] / arch / blackfin / include / asm / io.h

/*
 * Copyright 2004-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef _BFIN_IO_H
#define _BFIN_IO_H

#ifdef __KERNEL__

#ifndef __ASSEMBLY__
#include <linux/types.h>
#endif
#include <linux/compiler.h>

/*
 * These are for ISA/PCI shared memory _only_ and should never be used
 * on any other type of memory, including Zorro memory. They are meant to
 * access the bus in the bus byte order which is little-endian!.
 *
 * readX/writeX() are used to access memory mapped devices. On some
 * architectures the memory mapped IO stuff needs to be accessed
 * differently. On the bfin architecture, we just read/write the
 * memory location directly.
 */
#ifndef __ASSEMBLY__

static inline unsigned char readb(const volatile void __iomem *addr)
{
	unsigned int val;
	int tmp;

	__asm__ __volatile__ (
		"cli %1;"
		"NOP; NOP; SSYNC;"
		"%0 = b [%2] (z);"
		"sti %1;"
		: "=d"(val), "=d"(tmp)
		: "a"(addr)
	);

	return (unsigned char) val;
}

static inline unsigned short readw(const volatile void __iomem *addr)
{
	unsigned int val;
	int tmp;

	__asm__ __volatile__ (
		"cli %1;"
		"NOP; NOP; SSYNC;"
		"%0 = w [%2] (z);"
		"sti %1;"
		: "=d"(val), "=d"(tmp)
		: "a"(addr)
	);

	return (unsigned short) val;
}

static inline unsigned int readl(const volatile void __iomem *addr)
{
	unsigned int val;
	int tmp;

	__asm__ __volatile__ (
		"cli %1;"
		"NOP; NOP; SSYNC;"
		"%0 = [%2];"
		"sti %1;"
		: "=d"(val), "=d"(tmp)
		: "a"(addr)
	);

	return val;
}

#endif /*  __ASSEMBLY__ */

#define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b))
#define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b))
#define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))

#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
#define __raw_writeb writeb
#define __raw_writew writew
#define __raw_writel writel
#define memset_io(a, b, c)	memset((void *)(a), (b), (c))
#define memcpy_fromio(a, b, c)	memcpy((a), (void *)(b), (c))
#define memcpy_toio(a, b, c)	memcpy((void *)(a), (b), (c))

/* Convert "I/O port addresses" to actual addresses.  i.e. ugly casts. */
#define __io(port) ((void *)(unsigned long)(port))

#define inb(port)    readb(__io(port))
#define inw(port)    readw(__io(port))
#define inl(port)    readl(__io(port))
#define outb(x, port) writeb(x, __io(port))
#define outw(x, port) writew(x, __io(port))
#define outl(x, port) writel(x, __io(port))

#define inb_p(port)    inb(__io(port))
#define inw_p(port)    inw(__io(port))
#define inl_p(port)    inl(__io(port))
#define outb_p(x, port) outb(x, __io(port))
#define outw_p(x, port) outw(x, __io(port))
#define outl_p(x, port) outl(x, __io(port))

#define ioread8_rep(a, d, c)	readsb(a, d, c)
#define ioread16_rep(a, d, c)	readsw(a, d, c)
#define ioread32_rep(a, d, c)	readsl(a, d, c)
#define iowrite8_rep(a, s, c)	writesb(a, s, c)
#define iowrite16_rep(a, s, c)	writesw(a, s, c)
#define iowrite32_rep(a, s, c)	writesl(a, s, c)

#define ioread8(x)			readb(x)
#define ioread16(x)			readw(x)
#define ioread32(x)			readl(x)
#define iowrite8(val, x)		writeb(val, x)
#define iowrite16(val, x)		writew(val, x)
#define iowrite32(val, x)		writel(val, x)

#define mmiowb() wmb()

#define IO_SPACE_LIMIT 0xffffffff

/* Values for nocacheflag and cmode */
#define IOMAP_NOCACHE_SER		1

#ifndef __ASSEMBLY__

extern void outsb(unsigned long port, const void *addr, unsigned long count);
extern void outsw(unsigned long port, const void *addr, unsigned long count);
extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
extern void outsl(unsigned long port, const void *addr, unsigned long count);

extern void insb(unsigned long port, void *addr, unsigned long count);
extern void insw(unsigned long port, void *addr, unsigned long count);
extern void insw_8(unsigned long port, void *addr, unsigned long count);
extern void insl(unsigned long port, void *addr, unsigned long count);
extern void insl_16(unsigned long port, void *addr, unsigned long count);

extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);

extern void dma_insb(unsigned long port, void *addr, unsigned short count);
extern void dma_insw(unsigned long port, void *addr, unsigned short count);
extern void dma_insl(unsigned long port, void *addr, unsigned short count);

static inline void readsl(const void __iomem *addr, void *buf, int len)
{
	insl((unsigned long)addr, buf, len);
}

static inline void readsw(const void __iomem *addr, void *buf, int len)
{
	insw((unsigned long)addr, buf, len);
}

static inline void readsb(const void __iomem *addr, void *buf, int len)
{
	insb((unsigned long)addr, buf, len);
}

static inline void writesl(const void __iomem *addr, const void *buf, int len)
{
	outsl((unsigned long)addr, buf, len);
}

static inline void writesw(const void __iomem *addr, const void *buf, int len)
{
	outsw((unsigned long)addr, buf, len);
}

static inline void writesb(const void __iomem *addr, const void *buf, int len)
{
	outsb((unsigned long)addr, buf, len);
}

/*
 * Map some physical address range into the kernel address space.
 */
static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
				int cacheflag)
{
	return (void __iomem *)physaddr;
}

/*
 * Unmap a ioremap()ed region again
 */
static inline void iounmap(void *addr)
{
}

/*
 * __iounmap unmaps nearly everything, so be careful
 * it doesn't free currently pointer/page tables anymore but it
 * wans't used anyway and might be added later.
 */
static inline void __iounmap(void *addr, unsigned long size)
{
}

/*
 * Set new cache mode for some kernel address space.
 * The caller must push data for that range itself, if such data may already
 * be in the cache.
 */
static inline void kernel_set_cachemode(void *addr, unsigned long size,
					int cmode)
{
}

static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
static inline void __iomem *ioremap_nocache(unsigned long physaddr,
					    unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}

extern void blkfin_inv_cache_all(void);

#endif

#define	ioport_map(port, nr)		((void __iomem*)(port))
#define	ioport_unmap(addr)

/* Pages to physical address... */
#define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)

#define phys_to_virt(vaddr)	((void *) (vaddr))
#define virt_to_phys(vaddr)	((unsigned long) (vaddr))

#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt

/*
 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 * access
 */
#define xlate_dev_mem_ptr(p)	__va(p)

/*
 * Convert a virtual cached pointer to an uncached pointer
 */
#define xlate_dev_kmem_ptr(p)	p

#endif				/* __KERNEL__ */

#endif				/* _BFIN_IO_H */
Commit	Line	Data
96f1050d RG	1	/*
	2	* Copyright 2004-2009 Analog Devices Inc.
	3	*
	4	* Licensed under the GPL-2 or later.
	5	*/
	6
1394f032 BW	7	#ifndef _BFIN_IO_H
	8	#define _BFIN_IO_H
	9
	10	#ifdef __KERNEL__
	11
	12	#ifndef __ASSEMBLY__
	13	#include <linux/types.h>
	14	#endif
	15	#include <linux/compiler.h>
	16
	17	/*
	18	* These are for ISA/PCI shared memory _only_ and should never be used
	19	* on any other type of memory, including Zorro memory. They are meant to
	20	* access the bus in the bus byte order which is little-endian!.
	21	*
	22	* readX/writeX() are used to access memory mapped devices. On some
	23	* architectures the memory mapped IO stuff needs to be accessed
	24	* differently. On the bfin architecture, we just read/write the
	25	* memory location directly.
	26	*/
	27	#ifndef __ASSEMBLY__
	28
216e39db	29	static inline unsigned char readb(const volatile void __iomem *addr)
1394f032 BW	30	{
	31	unsigned int val;
	32	int tmp;
	33
2d40292b MF	34	__asm__ __volatile__ (
	35	"cli %1;"
	36	"NOP; NOP; SSYNC;"
	37	"%0 = b [%2] (z);"
	38	"sti %1;"
	39	: "=d"(val), "=d"(tmp)
	40	: "a"(addr)
	41	);
1394f032 BW	42
	43	return (unsigned char) val;
	44	}
	45
216e39db	46	static inline unsigned short readw(const volatile void __iomem *addr)
1394f032 BW	47	{
	48	unsigned int val;
	49	int tmp;
	50
2d40292b MF	51	__asm__ __volatile__ (
	52	"cli %1;"
	53	"NOP; NOP; SSYNC;"
	54	"%0 = w [%2] (z);"
	55	"sti %1;"
	56	: "=d"(val), "=d"(tmp)
	57	: "a"(addr)
	58	);
1394f032 BW	59
	60	return (unsigned short) val;
	61	}
	62
216e39db	63	static inline unsigned int readl(const volatile void __iomem *addr)
1394f032 BW	64	{
	65	unsigned int val;
	66	int tmp;
	67
2d40292b MF	68	__asm__ __volatile__ (
	69	"cli %1;"
	70	"NOP; NOP; SSYNC;"
	71	"%0 = [%2];"
	72	"sti %1;"
	73	: "=d"(val), "=d"(tmp)
	74	: "a"(addr)
	75	);
	76
1394f032 BW	77	return val;
	78	}
	79
	80	#endif /* __ASSEMBLY__ */
	81
2d40292b MF	82	#define writeb(b, addr) (void)(((volatile unsigned char ) (addr)) = (b))
	83	#define writew(b, addr) (void)(((volatile unsigned short ) (addr)) = (b))
	84	#define writel(b, addr) (void)(((volatile unsigned int ) (addr)) = (b))
1394f032 BW	85
	86	#define __raw_readb readb
	87	#define __raw_readw readw
	88	#define __raw_readl readl
	89	#define __raw_writeb writeb
	90	#define __raw_writew writew
	91	#define __raw_writel writel
2d40292b MF	92	#define memset_io(a, b, c) memset((void *)(a), (b), (c))
	93	#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
	94	#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
1394f032	95
f75196c4 MF	96	/* Convert "I/O port addresses" to actual addresses. i.e. ugly casts. */
	97	#define __io(port) ((void *)(unsigned long)(port))
	98
	99	#define inb(port) readb(__io(port))
	100	#define inw(port) readw(__io(port))
	101	#define inl(port) readl(__io(port))
2d40292b MF	102	#define outb(x, port) writeb(x, __io(port))
	103	#define outw(x, port) writew(x, __io(port))
	104	#define outl(x, port) writel(x, __io(port))
f75196c4 MF	105
	106	#define inb_p(port) inb(__io(port))
	107	#define inw_p(port) inw(__io(port))
	108	#define inl_p(port) inl(__io(port))
2d40292b MF	109	#define outb_p(x, port) outb(x, __io(port))
	110	#define outw_p(x, port) outw(x, __io(port))
	111	#define outl_p(x, port) outl(x, __io(port))
	112
	113	#define ioread8_rep(a, d, c) readsb(a, d, c)
	114	#define ioread16_rep(a, d, c) readsw(a, d, c)
	115	#define ioread32_rep(a, d, c) readsl(a, d, c)
	116	#define iowrite8_rep(a, s, c) writesb(a, s, c)
	117	#define iowrite16_rep(a, s, c) writesw(a, s, c)
	118	#define iowrite32_rep(a, s, c) writesl(a, s, c)
	119
	120	#define ioread8(x) readb(x)
	121	#define ioread16(x) readw(x)
	122	#define ioread32(x) readl(x)
	123	#define iowrite8(val, x) writeb(val, x)
	124	#define iowrite16(val, x) writew(val, x)
	125	#define iowrite32(val, x) writel(val, x)
1394f032	126
ecdbfc1a MF	127	#define mmiowb() wmb()
ecdbfc1a MF	128
1394f032 BW	129	#define IO_SPACE_LIMIT 0xffffffff
	130
	131	/* Values for nocacheflag and cmode */
	132	#define IOMAP_NOCACHE_SER 1
	133
	134	#ifndef __ASSEMBLY__
	135
b7b2d344 BW	136	extern void outsb(unsigned long port, const void *addr, unsigned long count);
b7b2d344 BW	137	extern void outsw(unsigned long port, const void *addr, unsigned long count);
59069676	138	extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
b7b2d344	139	extern void outsl(unsigned long port, const void *addr, unsigned long count);
1394f032	140
b7b2d344 BW	141	extern void insb(unsigned long port, void *addr, unsigned long count);
b7b2d344 BW	142	extern void insw(unsigned long port, void *addr, unsigned long count);
59069676	143	extern void insw_8(unsigned long port, void *addr, unsigned long count);
b7b2d344	144	extern void insl(unsigned long port, void *addr, unsigned long count);
5c91fb90	145	extern void insl_16(unsigned long port, void *addr, unsigned long count);
23ee968d	146
b7b2d344 BW	147	extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
	148	extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
	149	extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);
23ee968d	150
b7b2d344 BW	151	extern void dma_insb(unsigned long port, void *addr, unsigned short count);
	152	extern void dma_insw(unsigned long port, void *addr, unsigned short count);
	153	extern void dma_insl(unsigned long port, void *addr, unsigned short count);
1394f032	154
121e598f BW	155	static inline void readsl(const void __iomem addr, void buf, int len)
	156	{
	157	insl((unsigned long)addr, buf, len);
	158	}
	159
	160	static inline void readsw(const void __iomem addr, void buf, int len)
	161	{
	162	insw((unsigned long)addr, buf, len);
	163	}
	164
	165	static inline void readsb(const void __iomem addr, void buf, int len)
	166	{
	167	insb((unsigned long)addr, buf, len);
	168	}
	169
	170	static inline void writesl(const void __iomem addr, const void buf, int len)
	171	{
	172	outsl((unsigned long)addr, buf, len);
	173	}
	174
	175	static inline void writesw(const void __iomem addr, const void buf, int len)
	176	{
	177	outsw((unsigned long)addr, buf, len);
	178	}
	179
	180	static inline void writesb(const void __iomem addr, const void buf, int len)
	181	{
	182	outsb((unsigned long)addr, buf, len);
	183	}
	184
1394f032 BW	185	/*
	186	* Map some physical address range into the kernel address space.
	187	*/
	188	static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
	189	int cacheflag)
	190	{
	191	return (void __iomem *)physaddr;
	192	}
	193
	194	/*
	195	* Unmap a ioremap()ed region again
	196	*/
	197	static inline void iounmap(void *addr)
	198	{
	199	}
	200
	201	/*
	202	* __iounmap unmaps nearly everything, so be careful
	203	* it doesn't free currently pointer/page tables anymore but it
	204	* wans't used anyway and might be added later.
	205	*/
	206	static inline void __iounmap(void *addr, unsigned long size)
	207	{
	208	}
	209
	210	/*
	211	* Set new cache mode for some kernel address space.
	212	* The caller must push data for that range itself, if such data may already
	213	* be in the cache.
	214	*/
	215	static inline void kernel_set_cachemode(void *addr, unsigned long size,
	216	int cmode)
	217	{
	218	}
	219
	220	static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
	221	{
	222	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
	223	}
	224	static inline void __iomem *ioremap_nocache(unsigned long physaddr,
	225	unsigned long size)
	226	{
	227	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
	228	}
	229
	230	extern void blkfin_inv_cache_all(void);
	231
	232	#endif
	233
	234	#define ioport_map(port, nr) ((void __iomem*)(port))
	235	#define ioport_unmap(addr)
	236
1394f032	237	/* Pages to physical address... */
1394f032 BW	238	#define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
1394f032 BW	239
1394f032 BW	240	#define phys_to_virt(vaddr) ((void *) (vaddr))
	241	#define virt_to_phys(vaddr) ((unsigned long) (vaddr))
	242
	243	#define virt_to_bus virt_to_phys
	244	#define bus_to_virt phys_to_virt
	245
	246	/*
	247	* Convert a physical pointer to a virtual kernel pointer for /dev/mem
	248	* access
	249	*/
	250	#define xlate_dev_mem_ptr(p) __va(p)
	251
	252	/*
	253	* Convert a virtual cached pointer to an uncached pointer
	254	*/
	255	#define xlate_dev_kmem_ptr(p) p
	256
	257	#endif /* __KERNEL__ */
	258
	259	#endif /* _BFIN_IO_H */