1 files changed, 319 insertions, 0 deletions

diff --git a/arch/sh/boards/renesas/rts7751r2d/io.c b/arch/sh/boards/renesas/rts7751r2d/io.c
new file mode 100644
index 00000000000..c46f9154cfd
--- /dev/null
+++ b/arch/sh/boards/renesas/rts7751r2d/io.c
@@ -0,0 +1,319 @@
+/*
+ * linux/arch/sh/kernel/io_rts7751r2d.c
+ *
+ * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
+ * Based largely on io_se.c.
+ *
+ * I/O routine for Renesas Technology sales RTS7751R2D.
+ *
+ * Initial version only to support LAN access; some
+ * placeholder code from io_rts7751r2d.c left in with the
+ * expectation of later SuperIO and PCMCIA access.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/rts7751r2d/rts7751r2d.h>
+#include <asm/addrspace.h>
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include "../../../drivers/pci/pci-sh7751.h"
+
+/*
+ * The 7751R RTS7751R2D uses the built-in PCI controller (PCIC)
+ * of the 7751R processor, and has a SuperIO accessible via the PCI.
+ * The board also includes a PCMCIA controller on its memory bus,
+ * like the other Solution Engine boards.
+ */
+
+#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 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 unsigned long port2adr(unsigned int port)
+{
+        if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
+                if (port == 0x3f6)
+                        return (PA_AREA5_IO + 0x80c);
+                else
+                        return (PA_AREA5_IO + 0x1000 + ((port-0x1f0) << 1));
+        else
+                maybebadio(port2adr, (unsigned long)port);
+
+        return port;
+}
+
+static inline unsigned long port88796l(unsigned int port, int flag)
+{
+        unsigned long addr;
+
+        if (flag)
+                addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1);
+        else
+                addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1) + 0x1000;
+
+        return addr;
+}
+
+/* The 7751R RTS7751R2D seems to have everything hooked */
+/* up pretty normally (nothing on high-bytes only...) so this */
+/* shouldn't be needed */
+static inline int shifted_port(unsigned long port)
+{
+        /* For IDE registers, value is not shifted */
+        if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
+                return 0;
+        else
+                return 1;
+}
+
+/* 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
+
+#if defined(CONFIG_NE2000) || defined(CONFIG_NE2000_MODULE)
+#define CHECK_AX88796L_PORT(port) \
+  ((port >= AX88796L_IO_BASE) && (port < (AX88796L_IO_BASE+0x20)))
+#else
+#define CHECK_AX88796L_PORT(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 rts7751r2d_inb(unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                return (*(volatile unsigned short *)port88796l(port, 0)) & 0xff;
+        else if (PXSEG(port))
+                return *(volatile unsigned char *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                return *(volatile unsigned char *)PCI_IOMAP(port);
+        else
+                return (*(volatile unsigned short *)port2adr(port) & 0xff);
+}
+
+unsigned char rts7751r2d_inb_p(unsigned long port)
+{
+        unsigned char v;
+
+        if (CHECK_AX88796L_PORT(port))
+                v = (*(volatile unsigned short *)port88796l(port, 0)) & 0xff;
+        else if (PXSEG(port))
+                v = *(volatile unsigned char *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                v = *(volatile unsigned char *)PCI_IOMAP(port);
+        else
+                v = (*(volatile unsigned short *)port2adr(port) & 0xff);
+        delay();
+
+        return v;
+}
+
+unsigned short rts7751r2d_inw(unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                maybebadio(inw, port);
+        else if (PXSEG(port))
+                return *(volatile unsigned short *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                return *(volatile unsigned short *)PCI_IOMAP(port);
+        else
+                maybebadio(inw, port);
+
+        return 0;
+}
+
+unsigned int rts7751r2d_inl(unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                maybebadio(inl, port);
+        else if (PXSEG(port))
+                return *(volatile unsigned long *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                return *(volatile unsigned long *)PCI_IOMAP(port);
+        else
+                maybebadio(inl, port);
+
+        return 0;
+}
+
+void rts7751r2d_outb(unsigned char value, unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                *((volatile unsigned short *)port88796l(port, 0)) = value;
+        else if (PXSEG(port))
+                *(volatile unsigned char *)port = value;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                *(volatile unsigned char *)PCI_IOMAP(port) = value;
+        else
+                *(volatile unsigned short *)port2adr(port) = value;
+}
+
+void rts7751r2d_outb_p(unsigned char value, unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                *((volatile unsigned short *)port88796l(port, 0)) = value;
+        else if (PXSEG(port))
+                *(volatile unsigned char *)port = value;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                *(volatile unsigned char *)PCI_IOMAP(port) = value;
+        else
+                *(volatile unsigned short *)port2adr(port) = value;
+        delay();
+}
+
+void rts7751r2d_outw(unsigned short value, unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                maybebadio(outw, port);
+        else if (PXSEG(port))
+                *(volatile unsigned short *)port = value;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                *(volatile unsigned short *)PCI_IOMAP(port) = value;
+        else
+                maybebadio(outw, port);
+}
+
+void rts7751r2d_outl(unsigned int value, unsigned long port)
+{
+        if (CHECK_AX88796L_PORT(port))
+                maybebadio(outl, port);
+        else if (PXSEG(port))
+                *(volatile unsigned long *)port = value;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                *(volatile unsigned long *)PCI_IOMAP(port) = value;
+        else
+                maybebadio(outl, port);
+}
+
+void rts7751r2d_insb(unsigned long port, void *addr, unsigned long count)
+{
+        volatile __u8 *bp;
+        volatile __u16 *p;
+
+        if (CHECK_AX88796L_PORT(port)) {
+                p = (volatile unsigned short *)port88796l(port, 0);
+                while (count--) *((unsigned char *) addr)++ = *p & 0xff;
+        } else if (PXSEG(port))
+                while (count--) *((unsigned char *) addr)++ = *(volatile unsigned char *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
+                bp = (__u8 *)PCI_IOMAP(port);
+                while (count--) *((volatile unsigned char *) addr)++ = *bp;
+        } else {
+                p = (volatile unsigned short *)port2adr(port);
+                while (count--) *((unsigned char *) addr)++ = *p & 0xff;
+        }
+}
+
+void rts7751r2d_insw(unsigned long port, void *addr, unsigned long count)
+{
+        volatile __u16 *p;
+
+        if (CHECK_AX88796L_PORT(port))
+                p = (volatile unsigned short *)port88796l(port, 1);
+        else if (PXSEG(port))
+                p = (volatile unsigned short *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                p = (volatile unsigned short *)PCI_IOMAP(port);
+        else
+                p = (volatile unsigned short *)port2adr(port);
+        while (count--) *((__u16 *) addr)++ = *p;
+}
+
+void rts7751r2d_insl(unsigned long port, void *addr, unsigned long count)
+{
+        if (CHECK_AX88796L_PORT(port))
+                maybebadio(insl, port);
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
+                volatile __u32 *p = (__u32 *)PCI_IOMAP(port);
+
+                while (count--) *((__u32 *) addr)++ = *p;
+        } else
+                maybebadio(insl, port);
+}
+
+void rts7751r2d_outsb(unsigned long port, const void *addr, unsigned long count)
+{
+        volatile __u8 *bp;
+        volatile __u16 *p;
+
+        if (CHECK_AX88796L_PORT(port)) {
+                p = (volatile unsigned short *)port88796l(port, 0);
+                while (count--) *p = *((unsigned char *) addr)++;
+        } else if (PXSEG(port))
+                while (count--) *(volatile unsigned char *)port = *((unsigned char *) addr)++;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
+                bp = (__u8 *)PCI_IOMAP(port);
+                while (count--) *bp = *((volatile unsigned char *) addr)++;
+        } else {
+                p = (volatile unsigned short *)port2adr(port);
+                while (count--) *p = *((unsigned char *) addr)++;
+        }
+}
+
+void rts7751r2d_outsw(unsigned long port, const void *addr, unsigned long count)
+{
+        volatile __u16 *p;
+
+        if (CHECK_AX88796L_PORT(port))
+                p = (volatile unsigned short *)port88796l(port, 1);
+        else if (PXSEG(port))
+                p = (volatile unsigned short *)port;
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
+                p = (volatile unsigned short *)PCI_IOMAP(port);
+        else
+                p = (volatile unsigned short *)port2adr(port);
+        while (count--) *p = *((__u16 *) addr)++;
+}
+
+void rts7751r2d_outsl(unsigned long port, const void *addr, unsigned long count)
+{
+        if (CHECK_AX88796L_PORT(port))
+                maybebadio(outsl, port);
+        else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
+                volatile __u32 *p = (__u32 *)PCI_IOMAP(port);
+
+                while (count--) *p = *((__u32 *) addr)++;
+        } else
+                maybebadio(outsl, port);
+}
+
+void *rts7751r2d_ioremap(unsigned long offset, unsigned long size)
+{
+        if (offset >= 0xfd000000)
+                return (void *)offset;
+        else
+                return (void *)P2SEGADDR(offset);
+}
+EXPORT_SYMBOL(rts7751r2d_ioremap);
+
+unsigned long rts7751r2d_isa_port2addr(unsigned long offset)
+{
+        return port2adr(offset);
+}