2 * linux/arch/sh/kernel/io_7751se.c
4 * Copyright (C) 2002 David McCullough <davidm@snapgear.com>
5 * Copyright (C) 2001 Ian da Silva, Jeremy Siegel
6 * Based largely on io_se.c.
8 * I/O routine for Hitachi 7751 SolutionEngine.
10 * Initial version only to support LAN access; some
11 * placeholder code from io_se.c left in with the
12 * expectation of later SuperIO and PCMCIA access.
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/pci.h>
19 #include <asm/addrspace.h>
22 #include <asm/pci-sh7751.h>
24 #ifdef CONFIG_SH_SECUREEDGE5410
25 unsigned short secureedge5410_ioport;
29 * The SnapGear uses the built-in PCI controller (PCIC)
30 * of the 7751 processor
33 #define PCIIOBR (volatile long *)PCI_REG(SH7751_PCIIOBR)
34 #define PCIMBR (volatile long *)PCI_REG(SH7751_PCIMBR)
35 #define PCI_IO_AREA SH7751_PCI_IO_BASE
36 #define PCI_MEM_AREA SH7751_PCI_CONFIG_BASE
39 #define PCI_IOMAP(adr) (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
42 #define maybebadio(name,port) \
43 printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
44 #name, (port), (__u32) __builtin_return_address(0))
47 static inline void delay(void)
53 static inline volatile __u16 *
54 port2adr(unsigned int port)
58 return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
60 maybebadio(name,port);
61 return (volatile __u16*)port;
65 /* In case someone configures the kernel w/o PCI support: in that */
66 /* scenario, don't ever bother to check for PCI-window addresses */
68 /* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
69 #if defined(CONFIG_PCI)
70 #define CHECK_SH7751_PCIIO(port) \
71 ((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
73 #define CHECK_SH7751_PCIIO(port) (0)
77 * General outline: remap really low stuff [eventually] to SuperIO,
78 * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
79 * is mapped through the PCI IO window. Stuff with high bits (PXSEG)
80 * should be way beyond the window, and is used w/o translation for
84 unsigned char snapgear_inb(unsigned long port)
87 return *(volatile unsigned char *)port;
88 else if (CHECK_SH7751_PCIIO(port))
89 return *(volatile unsigned char *)PCI_IOMAP(port);
91 return (*port2adr(port))&0xff;
95 unsigned char snapgear_inb_p(unsigned long port)
100 v = *(volatile unsigned char *)port;
101 else if (CHECK_SH7751_PCIIO(port))
102 v = *(volatile unsigned char *)PCI_IOMAP(port);
104 v = (*port2adr(port))&0xff;
110 unsigned short snapgear_inw(unsigned long port)
113 return *(volatile unsigned short *)port;
114 else if (CHECK_SH7751_PCIIO(port))
115 return *(volatile unsigned short *)PCI_IOMAP(port);
116 else if (port >= 0x2000)
117 return *port2adr(port);
119 maybebadio(inw, port);
124 unsigned int snapgear_inl(unsigned long port)
127 return *(volatile unsigned long *)port;
128 else if (CHECK_SH7751_PCIIO(port))
129 return *(volatile unsigned int *)PCI_IOMAP(port);
130 else if (port >= 0x2000)
131 return *port2adr(port);
133 maybebadio(inl, port);
138 void snapgear_outb(unsigned char value, unsigned long port)
142 *(volatile unsigned char *)port = value;
143 else if (CHECK_SH7751_PCIIO(port))
144 *((unsigned char*)PCI_IOMAP(port)) = value;
146 *(port2adr(port)) = value;
150 void snapgear_outb_p(unsigned char value, unsigned long port)
153 *(volatile unsigned char *)port = value;
154 else if (CHECK_SH7751_PCIIO(port))
155 *((unsigned char*)PCI_IOMAP(port)) = value;
157 *(port2adr(port)) = value;
162 void snapgear_outw(unsigned short value, unsigned long port)
165 *(volatile unsigned short *)port = value;
166 else if (CHECK_SH7751_PCIIO(port))
167 *((unsigned short *)PCI_IOMAP(port)) = value;
168 else if (port >= 0x2000)
169 *port2adr(port) = value;
171 maybebadio(outw, port);
175 void snapgear_outl(unsigned int value, unsigned long port)
178 *(volatile unsigned long *)port = value;
179 else if (CHECK_SH7751_PCIIO(port))
180 *((unsigned long*)PCI_IOMAP(port)) = value;
182 maybebadio(outl, port);
186 void snapgear_insb(unsigned long port, void *addr, unsigned long count)
188 unsigned char *p = addr;
189 while (count--) *p++ = snapgear_inb(port);
193 void snapgear_insw(unsigned long port, void *addr, unsigned long count)
195 unsigned short *p = addr;
196 while (count--) *p++ = snapgear_inw(port);
200 void snapgear_insl(unsigned long port, void *addr, unsigned long count)
202 maybebadio(insl, port);
206 void snapgear_outsb(unsigned long port, const void *addr, unsigned long count)
208 unsigned char *p = (unsigned char*)addr;
209 while (count--) snapgear_outb(*p++, port);
213 void snapgear_outsw(unsigned long port, const void *addr, unsigned long count)
215 unsigned short *p = (unsigned short*)addr;
216 while (count--) snapgear_outw(*p++, port);
220 void snapgear_outsl(unsigned long port, const void *addr, unsigned long count)
222 maybebadio(outsw, port);
226 /* For read/write calls, just copy generic (pass-thru); PCIMBR is */
227 /* already set up. For a larger memory space, these would need to */
228 /* reset PCIMBR as needed on a per-call basis... */
230 unsigned char snapgear_readb(unsigned long addr)
232 return (* ((volatile unsigned char *) addr));
236 unsigned short snapgear_readw(unsigned long addr)
238 return (* ((volatile unsigned short *) addr));
242 unsigned int snapgear_readl(unsigned long addr)
244 return (* ((volatile unsigned long *) addr));
248 void snapgear_writeb(unsigned char b, unsigned long addr)
250 *(volatile unsigned char*)addr = b;
254 void snapgear_writew(unsigned short b, unsigned long addr)
256 *(volatile unsigned short*)addr = b;
260 void snapgear_writel(unsigned int b, unsigned long addr)
262 *(volatile unsigned long*)addr = b;
266 /* Map ISA bus address to the real address. Only for PCMCIA. */
269 /* ISA page descriptor. */
270 static __u32 sh_isa_memmap[256];
274 sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
278 if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
282 sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff);
284 printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n",
285 start, length, offset, idx, sh_isa_memmap[idx]);
292 snapgear_isa_port2addr(unsigned long offset)
296 idx = (offset >> 12) & 0xff;
298 return sh_isa_memmap[idx] + offset;