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/arch/sh/boards/renesas/systemh/io.c

https://bitbucket.org/evzijst/gittest
C | 283 lines | 212 code | 41 blank | 30 comment | 54 complexity | 37ac7170ec604d6cf9cfd13383b54f28 MD5 | raw file
  1/*
  2 * linux/arch/sh/boards/systemh/io.c
  3 *
  4 * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
  5 * Based largely on io_se.c.
  6 *
  7 * I/O routine for Hitachi 7751 Systemh.
  8 *
  9 */
 10
 11#include <linux/kernel.h>
 12#include <linux/types.h>
 13#include <asm/systemh/7751systemh.h>
 14#include <asm/addrspace.h>
 15#include <asm/io.h>
 16
 17#include <linux/pci.h>
 18#include "../../drivers/pci/pci-sh7751.h"
 19
 20/*
 21 * The 7751 SystemH Engine uses the built-in PCI controller (PCIC)
 22 * of the 7751 processor, and has a SuperIO accessible on its memory
 23 * bus.
 24 */
 25
 26#define PCIIOBR		(volatile long *)PCI_REG(SH7751_PCIIOBR)
 27#define PCIMBR          (volatile long *)PCI_REG(SH7751_PCIMBR)
 28#define PCI_IO_AREA	SH7751_PCI_IO_BASE
 29#define PCI_MEM_AREA	SH7751_PCI_CONFIG_BASE
 30
 31#define PCI_IOMAP(adr)	(PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
 32#define ETHER_IOMAP(adr) (0xB3000000 + (adr)) /*map to 16bits access area
 33                                                of smc lan chip*/
 34
 35#define maybebadio(name,port) \
 36  printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
 37	 #name, (port), (__u32) __builtin_return_address(0))
 38
 39static inline void delay(void)
 40{
 41	ctrl_inw(0xa0000000);
 42}
 43
 44static inline volatile __u16 *
 45port2adr(unsigned int port)
 46{
 47	if (port >= 0x2000)
 48		return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
 49#if 0
 50	else
 51		return (volatile __u16 *) (PA_SUPERIO + (port << 1));
 52#endif
 53	maybebadio(name,(unsigned long)port);
 54	return (volatile __u16*)port;
 55}
 56
 57/* In case someone configures the kernel w/o PCI support: in that */
 58/* scenario, don't ever bother to check for PCI-window addresses */
 59
 60/* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
 61#if defined(CONFIG_PCI)
 62#define CHECK_SH7751_PCIIO(port) \
 63  ((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
 64#else
 65#define CHECK_SH7751_PCIIO(port) (0)
 66#endif
 67
 68/*
 69 * General outline: remap really low stuff [eventually] to SuperIO,
 70 * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
 71 * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
 72 * should be way beyond the window, and is used  w/o translation for
 73 * compatibility.
 74 */
 75unsigned char sh7751systemh_inb(unsigned long port)
 76{
 77	if (PXSEG(port))
 78		return *(volatile unsigned char *)port;
 79	else if (CHECK_SH7751_PCIIO(port))
 80		return *(volatile unsigned char *)PCI_IOMAP(port);
 81	else if (port <= 0x3F1)
 82		return *(volatile unsigned char *)ETHER_IOMAP(port);
 83	else
 84		return (*port2adr(port))&0xff;
 85}
 86
 87unsigned char sh7751systemh_inb_p(unsigned long port)
 88{
 89	unsigned char v;
 90
 91        if (PXSEG(port))
 92                v = *(volatile unsigned char *)port;
 93	else if (CHECK_SH7751_PCIIO(port))
 94                v = *(volatile unsigned char *)PCI_IOMAP(port);
 95	else if (port <= 0x3F1)
 96		v = *(volatile unsigned char *)ETHER_IOMAP(port);
 97	else
 98		v = (*port2adr(port))&0xff;
 99	delay();
100	return v;
101}
102
103unsigned short sh7751systemh_inw(unsigned long port)
104{
105        if (PXSEG(port))
106                return *(volatile unsigned short *)port;
107	else if (CHECK_SH7751_PCIIO(port))
108                return *(volatile unsigned short *)PCI_IOMAP(port);
109	else if (port >= 0x2000)
110		return *port2adr(port);
111	else if (port <= 0x3F1)
112		return *(volatile unsigned int *)ETHER_IOMAP(port);
113	else
114		maybebadio(inw, port);
115	return 0;
116}
117
118unsigned int sh7751systemh_inl(unsigned long port)
119{
120        if (PXSEG(port))
121                return *(volatile unsigned long *)port;
122	else if (CHECK_SH7751_PCIIO(port))
123                return *(volatile unsigned int *)PCI_IOMAP(port);
124	else if (port >= 0x2000)
125		return *port2adr(port);
126	else if (port <= 0x3F1)
127		return *(volatile unsigned int *)ETHER_IOMAP(port);
128	else
129		maybebadio(inl, port);
130	return 0;
131}
132
133void sh7751systemh_outb(unsigned char value, unsigned long port)
134{
135
136        if (PXSEG(port))
137                *(volatile unsigned char *)port = value;
138	else if (CHECK_SH7751_PCIIO(port))
139        	*((unsigned char*)PCI_IOMAP(port)) = value;
140	else if (port <= 0x3F1)
141		*(volatile unsigned char *)ETHER_IOMAP(port) = value;
142	else
143		*(port2adr(port)) = value;
144}
145
146void sh7751systemh_outb_p(unsigned char value, unsigned long port)
147{
148        if (PXSEG(port))
149                *(volatile unsigned char *)port = value;
150	else if (CHECK_SH7751_PCIIO(port))
151        	*((unsigned char*)PCI_IOMAP(port)) = value;
152	else if (port <= 0x3F1)
153		*(volatile unsigned char *)ETHER_IOMAP(port) = value;
154	else
155		*(port2adr(port)) = value;
156	delay();
157}
158
159void sh7751systemh_outw(unsigned short value, unsigned long port)
160{
161        if (PXSEG(port))
162                *(volatile unsigned short *)port = value;
163	else if (CHECK_SH7751_PCIIO(port))
164        	*((unsigned short *)PCI_IOMAP(port)) = value;
165	else if (port >= 0x2000)
166		*port2adr(port) = value;
167	else if (port <= 0x3F1)
168		*(volatile unsigned short *)ETHER_IOMAP(port) = value;
169	else
170		maybebadio(outw, port);
171}
172
173void sh7751systemh_outl(unsigned int value, unsigned long port)
174{
175        if (PXSEG(port))
176                *(volatile unsigned long *)port = value;
177	else if (CHECK_SH7751_PCIIO(port))
178        	*((unsigned long*)PCI_IOMAP(port)) = value;
179	else
180		maybebadio(outl, port);
181}
182
183void sh7751systemh_insb(unsigned long port, void *addr, unsigned long count)
184{
185	unsigned char *p = addr;
186	while (count--) *p++ = sh7751systemh_inb(port);
187}
188
189void sh7751systemh_insw(unsigned long port, void *addr, unsigned long count)
190{
191	unsigned short *p = addr;
192	while (count--) *p++ = sh7751systemh_inw(port);
193}
194
195void sh7751systemh_insl(unsigned long port, void *addr, unsigned long count)
196{
197	maybebadio(insl, port);
198}
199
200void sh7751systemh_outsb(unsigned long port, const void *addr, unsigned long count)
201{
202	unsigned char *p = (unsigned char*)addr;
203	while (count--) sh7751systemh_outb(*p++, port);
204}
205
206void sh7751systemh_outsw(unsigned long port, const void *addr, unsigned long count)
207{
208	unsigned short *p = (unsigned short*)addr;
209	while (count--) sh7751systemh_outw(*p++, port);
210}
211
212void sh7751systemh_outsl(unsigned long port, const void *addr, unsigned long count)
213{
214	maybebadio(outsw, port);
215}
216
217/* For read/write calls, just copy generic (pass-thru); PCIMBR is  */
218/* already set up.  For a larger memory space, these would need to */
219/* reset PCIMBR as needed on a per-call basis...                   */
220
221unsigned char sh7751systemh_readb(unsigned long addr)
222{
223	return *(volatile unsigned char*)addr;
224}
225
226unsigned short sh7751systemh_readw(unsigned long addr)
227{
228	return *(volatile unsigned short*)addr;
229}
230
231unsigned int sh7751systemh_readl(unsigned long addr)
232{
233	return *(volatile unsigned long*)addr;
234}
235
236void sh7751systemh_writeb(unsigned char b, unsigned long addr)
237{
238	*(volatile unsigned char*)addr = b;
239}
240
241void sh7751systemh_writew(unsigned short b, unsigned long addr)
242{
243	*(volatile unsigned short*)addr = b;
244}
245
246void sh7751systemh_writel(unsigned int b, unsigned long addr)
247{
248        *(volatile unsigned long*)addr = b;
249}
250
251
252
253/* Map ISA bus address to the real address. Only for PCMCIA.  */
254
255/* ISA page descriptor.  */
256static __u32 sh_isa_memmap[256];
257
258#if 0
259static int
260sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
261{
262	int idx;
263
264	if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
265		return -1;
266
267	idx = start >> 12;
268	sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff);
269	printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n",
270	       start, length, offset, idx, sh_isa_memmap[idx]);
271	return 0;
272}
273#endif
274
275unsigned long
276sh7751systemh_isa_port2addr(unsigned long offset)
277{
278	int idx;
279
280	idx = (offset >> 12) & 0xff;
281	offset &= 0xfff;
282	return sh_isa_memmap[idx] + offset;
283}