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-rw-r--r--arch/sh/boards/renesas/systemh/io.c283
1 files changed, 283 insertions, 0 deletions
diff --git a/arch/sh/boards/renesas/systemh/io.c b/arch/sh/boards/renesas/systemh/io.c
new file mode 100644
index 000000000000..cf979011aa94
--- /dev/null
+++ b/arch/sh/boards/renesas/systemh/io.c
@@ -0,0 +1,283 @@
+/*
+ * linux/arch/sh/boards/systemh/io.c
+ *
+ * Copyright (C) 2001 Ian da Silva, Jeremy Siegel
+ * Based largely on io_se.c.
+ *
+ * I/O routine for Hitachi 7751 Systemh.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/systemh/7751systemh.h>
+#include <asm/addrspace.h>
+#include <asm/io.h>
+
+#include <linux/pci.h>
+#include "../../drivers/pci/pci-sh7751.h"
+
+/*
+ * The 7751 SystemH Engine uses the built-in PCI controller (PCIC)
+ * of the 7751 processor, and has a SuperIO accessible on its memory
+ * bus.
+ */
+
+#define PCIIOBR (volatile long *)PCI_REG(SH7751_PCIIOBR)
+#define PCIMBR (volatile long *)PCI_REG(SH7751_PCIMBR)
+#define PCI_IO_AREA SH7751_PCI_IO_BASE
+#define PCI_MEM_AREA SH7751_PCI_CONFIG_BASE
+
+#define PCI_IOMAP(adr) (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
+#define ETHER_IOMAP(adr) (0xB3000000 + (adr)) /*map to 16bits access area
+ of smc lan chip*/
+
+#define maybebadio(name,port) \
+ printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
+ #name, (port), (__u32) __builtin_return_address(0))
+
+static inline void delay(void)
+{
+ ctrl_inw(0xa0000000);
+}
+
+static inline volatile __u16 *
+port2adr(unsigned int port)
+{
+ if (port >= 0x2000)
+ return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
+#if 0
+ else
+ return (volatile __u16 *) (PA_SUPERIO + (port << 1));
+#endif
+ maybebadio(name,(unsigned long)port);
+ return (volatile __u16*)port;
+}
+
+/* In case someone configures the kernel w/o PCI support: in that */
+/* scenario, don't ever bother to check for PCI-window addresses */
+
+/* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
+#if defined(CONFIG_PCI)
+#define CHECK_SH7751_PCIIO(port) \
+ ((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
+#else
+#define CHECK_SH7751_PCIIO(port) (0)
+#endif
+
+/*
+ * General outline: remap really low stuff [eventually] to SuperIO,
+ * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
+ * is mapped through the PCI IO window. Stuff with high bits (PXSEG)
+ * should be way beyond the window, and is used w/o translation for
+ * compatibility.
+ */
+unsigned char sh7751systemh_inb(unsigned long port)
+{
+ if (PXSEG(port))
+ return *(volatile unsigned char *)port;
+ else if (CHECK_SH7751_PCIIO(port))
+ return *(volatile unsigned char *)PCI_IOMAP(port);
+ else if (port <= 0x3F1)
+ return *(volatile unsigned char *)ETHER_IOMAP(port);
+ else
+ return (*port2adr(port))&0xff;
+}
+
+unsigned char sh7751systemh_inb_p(unsigned long port)
+{
+ unsigned char v;
+
+ if (PXSEG(port))
+ v = *(volatile unsigned char *)port;
+ else if (CHECK_SH7751_PCIIO(port))
+ v = *(volatile unsigned char *)PCI_IOMAP(port);
+ else if (port <= 0x3F1)
+ v = *(volatile unsigned char *)ETHER_IOMAP(port);
+ else
+ v = (*port2adr(port))&0xff;
+ delay();
+ return v;
+}
+
+unsigned short sh7751systemh_inw(unsigned long port)
+{
+ if (PXSEG(port))
+ return *(volatile unsigned short *)port;
+ else if (CHECK_SH7751_PCIIO(port))
+ return *(volatile unsigned short *)PCI_IOMAP(port);
+ else if (port >= 0x2000)
+ return *port2adr(port);
+ else if (port <= 0x3F1)
+ return *(volatile unsigned int *)ETHER_IOMAP(port);
+ else
+ maybebadio(inw, port);
+ return 0;
+}
+
+unsigned int sh7751systemh_inl(unsigned long port)
+{
+ if (PXSEG(port))
+ return *(volatile unsigned long *)port;
+ else if (CHECK_SH7751_PCIIO(port))
+ return *(volatile unsigned int *)PCI_IOMAP(port);
+ else if (port >= 0x2000)
+ return *port2adr(port);
+ else if (port <= 0x3F1)
+ return *(volatile unsigned int *)ETHER_IOMAP(port);
+ else
+ maybebadio(inl, port);
+ return 0;
+}
+
+void sh7751systemh_outb(unsigned char value, unsigned long port)
+{
+
+ if (PXSEG(port))
+ *(volatile unsigned char *)port = value;
+ else if (CHECK_SH7751_PCIIO(port))
+ *((unsigned char*)PCI_IOMAP(port)) = value;
+ else if (port <= 0x3F1)
+ *(volatile unsigned char *)ETHER_IOMAP(port) = value;
+ else
+ *(port2adr(port)) = value;
+}
+
+void sh7751systemh_outb_p(unsigned char value, unsigned long port)
+{
+ if (PXSEG(port))
+ *(volatile unsigned char *)port = value;
+ else if (CHECK_SH7751_PCIIO(port))
+ *((unsigned char*)PCI_IOMAP(port)) = value;
+ else if (port <= 0x3F1)
+ *(volatile unsigned char *)ETHER_IOMAP(port) = value;
+ else
+ *(port2adr(port)) = value;
+ delay();
+}
+
+void sh7751systemh_outw(unsigned short value, unsigned long port)
+{
+ if (PXSEG(port))
+ *(volatile unsigned short *)port = value;
+ else if (CHECK_SH7751_PCIIO(port))
+ *((unsigned short *)PCI_IOMAP(port)) = value;
+ else if (port >= 0x2000)
+ *port2adr(port) = value;
+ else if (port <= 0x3F1)
+ *(volatile unsigned short *)ETHER_IOMAP(port) = value;
+ else
+ maybebadio(outw, port);
+}
+
+void sh7751systemh_outl(unsigned int value, unsigned long port)
+{
+ if (PXSEG(port))
+ *(volatile unsigned long *)port = value;
+ else if (CHECK_SH7751_PCIIO(port))
+ *((unsigned long*)PCI_IOMAP(port)) = value;
+ else
+ maybebadio(outl, port);
+}
+
+void sh7751systemh_insb(unsigned long port, void *addr, unsigned long count)
+{
+ unsigned char *p = addr;
+ while (count--) *p++ = sh7751systemh_inb(port);
+}
+
+void sh7751systemh_insw(unsigned long port, void *addr, unsigned long count)
+{
+ unsigned short *p = addr;
+ while (count--) *p++ = sh7751systemh_inw(port);
+}
+
+void sh7751systemh_insl(unsigned long port, void *addr, unsigned long count)
+{
+ maybebadio(insl, port);
+}
+
+void sh7751systemh_outsb(unsigned long port, const void *addr, unsigned long count)
+{
+ unsigned char *p = (unsigned char*)addr;
+ while (count--) sh7751systemh_outb(*p++, port);
+}
+
+void sh7751systemh_outsw(unsigned long port, const void *addr, unsigned long count)
+{
+ unsigned short *p = (unsigned short*)addr;
+ while (count--) sh7751systemh_outw(*p++, port);
+}
+
+void sh7751systemh_outsl(unsigned long port, const void *addr, unsigned long count)
+{
+ maybebadio(outsw, port);
+}
+
+/* For read/write calls, just copy generic (pass-thru); PCIMBR is */
+/* already set up. For a larger memory space, these would need to */
+/* reset PCIMBR as needed on a per-call basis... */
+
+unsigned char sh7751systemh_readb(unsigned long addr)
+{
+ return *(volatile unsigned char*)addr;
+}
+
+unsigned short sh7751systemh_readw(unsigned long addr)
+{
+ return *(volatile unsigned short*)addr;
+}
+
+unsigned int sh7751systemh_readl(unsigned long addr)
+{
+ return *(volatile unsigned long*)addr;
+}
+
+void sh7751systemh_writeb(unsigned char b, unsigned long addr)
+{
+ *(volatile unsigned char*)addr = b;
+}
+
+void sh7751systemh_writew(unsigned short b, unsigned long addr)
+{
+ *(volatile unsigned short*)addr = b;
+}
+
+void sh7751systemh_writel(unsigned int b, unsigned long addr)
+{
+ *(volatile unsigned long*)addr = b;
+}
+
+
+
+/* Map ISA bus address to the real address. Only for PCMCIA. */
+
+/* ISA page descriptor. */
+static __u32 sh_isa_memmap[256];
+
+#if 0
+static int
+sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
+{
+ int idx;
+
+ if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
+ return -1;
+
+ idx = start >> 12;
+ sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff);
+ printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n",
+ start, length, offset, idx, sh_isa_memmap[idx]);
+ return 0;
+}
+#endif
+
+unsigned long
+sh7751systemh_isa_port2addr(unsigned long offset)
+{
+ int idx;
+
+ idx = (offset >> 12) & 0xff;
+ offset &= 0xfff;
+ return sh_isa_memmap[idx] + offset;
+}
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