2 * linux/arch/sh/boards/systemh/io.c
4 * Copyright (C) 2001 Ian da Silva, Jeremy Siegel
5 * Based largely on io_se.c.
7 * I/O routine for Hitachi 7751 Systemh.
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <asm/systemh/7751systemh.h>
14 #include <asm/addrspace.h>
17 #include <linux/pci.h>
18 #include "../../drivers/pci/pci-sh7751.h"
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
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
31 #define PCI_IOMAP(adr) (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
32 #define ETHER_IOMAP(adr) (0xB3000000 + (adr)) /*map to 16bits access area
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))
39 static inline void delay(void)
44 static inline volatile __u16 *
45 port2adr(unsigned int port)
48 return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
51 return (volatile __u16 *) (PA_SUPERIO + (port << 1));
53 maybebadio(name,(unsigned long)port);
54 return (volatile __u16*)port;
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 */
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)))
65 #define CHECK_SH7751_PCIIO(port) (0)
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
75 unsigned char sh7751systemh_inb(unsigned long 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);
84 return (*port2adr(port))&0xff;
87 unsigned char sh7751systemh_inb_p(unsigned long 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);
98 v = (*port2adr(port))&0xff;
103 unsigned short sh7751systemh_inw(unsigned long 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);
114 maybebadio(inw, port);
118 unsigned int sh7751systemh_inl(unsigned long 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);
129 maybebadio(inl, port);
133 void sh7751systemh_outb(unsigned char value, unsigned long 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;
143 *(port2adr(port)) = value;
146 void sh7751systemh_outb_p(unsigned char value, unsigned long 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;
155 *(port2adr(port)) = value;
159 void sh7751systemh_outw(unsigned short value, unsigned long 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;
170 maybebadio(outw, port);
173 void sh7751systemh_outl(unsigned int value, unsigned long port)
176 *(volatile unsigned long *)port = value;
177 else if (CHECK_SH7751_PCIIO(port))
178 *((unsigned long*)PCI_IOMAP(port)) = value;
180 maybebadio(outl, port);
183 void sh7751systemh_insb(unsigned long port, void *addr, unsigned long count)
185 unsigned char *p = addr;
186 while (count--) *p++ = sh7751systemh_inb(port);
189 void sh7751systemh_insw(unsigned long port, void *addr, unsigned long count)
191 unsigned short *p = addr;
192 while (count--) *p++ = sh7751systemh_inw(port);
195 void sh7751systemh_insl(unsigned long port, void *addr, unsigned long count)
197 maybebadio(insl, port);
200 void sh7751systemh_outsb(unsigned long port, const void *addr, unsigned long count)
202 unsigned char *p = (unsigned char*)addr;
203 while (count--) sh7751systemh_outb(*p++, port);
206 void sh7751systemh_outsw(unsigned long port, const void *addr, unsigned long count)
208 unsigned short *p = (unsigned short*)addr;
209 while (count--) sh7751systemh_outw(*p++, port);
212 void sh7751systemh_outsl(unsigned long port, const void *addr, unsigned long count)
214 maybebadio(outsw, port);
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... */
221 unsigned char sh7751systemh_readb(unsigned long addr)
223 return *(volatile unsigned char*)addr;
226 unsigned short sh7751systemh_readw(unsigned long addr)
228 return *(volatile unsigned short*)addr;
231 unsigned int sh7751systemh_readl(unsigned long addr)
233 return *(volatile unsigned long*)addr;
236 void sh7751systemh_writeb(unsigned char b, unsigned long addr)
238 *(volatile unsigned char*)addr = b;
241 void sh7751systemh_writew(unsigned short b, unsigned long addr)
243 *(volatile unsigned short*)addr = b;
246 void sh7751systemh_writel(unsigned int b, unsigned long addr)
248 *(volatile unsigned long*)addr = b;
253 /* Map ISA bus address to the real address. Only for PCMCIA. */
255 /* ISA page descriptor. */
256 static __u32 sh_isa_memmap[256];
260 sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
264 if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
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]);
276 sh7751systemh_isa_port2addr(unsigned long offset)
280 idx = (offset >> 12) & 0xff;
282 return sh_isa_memmap[idx] + offset;