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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/cchips/hd6446x/hd64465/io.c
downloadlinux-stericsson-9e734775f7c22d2f89943ad6c745571f1930105f.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sh/cchips/hd6446x/hd64465/io.c')
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1 files changed, 216 insertions, 0 deletions
diff --git a/arch/sh/cchips/hd6446x/hd64465/io.c b/arch/sh/cchips/hd6446x/hd64465/io.c
new file mode 100644
index 000000000000..99ac709c550e
--- /dev/null
+++ b/arch/sh/cchips/hd6446x/hd64465/io.c
@@ -0,0 +1,216 @@
+/*
+ * $Id: io.c,v 1.4 2003/08/03 03:05:10 lethal Exp $
+ * by Greg Banks <gbanks@pocketpenguins.com>
+ * (c) 2000 PocketPenguins Inc
+ *
+ * Derived from io_hd64461.c, which bore the message:
+ * Copyright (C) 2000 YAEGASHI Takeshi
+ *
+ * Typical I/O routines for HD64465 system.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/io.h>
+#include <asm/hd64465/hd64465.h>
+
+
+#define HD64465_DEBUG 0
+
+#if HD64465_DEBUG
+#define DPRINTK(args...) printk(args)
+#define DIPRINTK(n, args...) if (hd64465_io_debug>(n)) printk(args)
+#else
+#define DPRINTK(args...)
+#define DIPRINTK(n, args...)
+#endif
+
+
+
+/* This is a hack suitable only for debugging IO port problems */
+int hd64465_io_debug;
+EXPORT_SYMBOL(hd64465_io_debug);
+
+/* Low iomap maps port 0-1K to addresses in 8byte chunks */
+#define HD64465_IOMAP_LO_THRESH 0x400
+#define HD64465_IOMAP_LO_SHIFT 3
+#define HD64465_IOMAP_LO_MASK ((1<<HD64465_IOMAP_LO_SHIFT)-1)
+#define HD64465_IOMAP_LO_NMAP (HD64465_IOMAP_LO_THRESH>>HD64465_IOMAP_LO_SHIFT)
+static unsigned long hd64465_iomap_lo[HD64465_IOMAP_LO_NMAP];
+static unsigned char hd64465_iomap_lo_shift[HD64465_IOMAP_LO_NMAP];
+
+/* High iomap maps port 1K-64K to addresses in 1K chunks */
+#define HD64465_IOMAP_HI_THRESH 0x10000
+#define HD64465_IOMAP_HI_SHIFT 10
+#define HD64465_IOMAP_HI_MASK ((1<<HD64465_IOMAP_HI_SHIFT)-1)
+#define HD64465_IOMAP_HI_NMAP (HD64465_IOMAP_HI_THRESH>>HD64465_IOMAP_HI_SHIFT)
+static unsigned long hd64465_iomap_hi[HD64465_IOMAP_HI_NMAP];
+static unsigned char hd64465_iomap_hi_shift[HD64465_IOMAP_HI_NMAP];
+
+#ifndef MAX
+#define MAX(a,b) ((a)>(b)?(a):(b))
+#endif
+
+#define PORT2ADDR(x) (sh_mv.mv_isa_port2addr(x))
+
+void hd64465_port_map(unsigned short baseport, unsigned int nports,
+ unsigned long addr, unsigned char shift)
+{
+ unsigned int port, endport = baseport + nports;
+
+ DPRINTK("hd64465_port_map(base=0x%04hx, n=0x%04hx, addr=0x%08lx,endport=0x%04x)\n",
+ baseport, nports, addr,endport);
+
+ for (port = baseport ;
+ port < endport && port < HD64465_IOMAP_LO_THRESH ;
+ port += (1<<HD64465_IOMAP_LO_SHIFT)) {
+ DPRINTK(" maplo[0x%x] = 0x%08lx\n", port, addr);
+ hd64465_iomap_lo[port>>HD64465_IOMAP_LO_SHIFT] = addr;
+ hd64465_iomap_lo_shift[port>>HD64465_IOMAP_LO_SHIFT] = shift;
+ addr += (1<<(HD64465_IOMAP_LO_SHIFT));
+ }
+
+ for (port = MAX(baseport, HD64465_IOMAP_LO_THRESH) ;
+ port < endport && port < HD64465_IOMAP_HI_THRESH ;
+ port += (1<<HD64465_IOMAP_HI_SHIFT)) {
+ DPRINTK(" maphi[0x%x] = 0x%08lx\n", port, addr);
+ hd64465_iomap_hi[port>>HD64465_IOMAP_HI_SHIFT] = addr;
+ hd64465_iomap_hi_shift[port>>HD64465_IOMAP_HI_SHIFT] = shift;
+ addr += (1<<(HD64465_IOMAP_HI_SHIFT));
+ }
+}
+EXPORT_SYMBOL(hd64465_port_map);
+
+void hd64465_port_unmap(unsigned short baseport, unsigned int nports)
+{
+ unsigned int port, endport = baseport + nports;
+
+ DPRINTK("hd64465_port_unmap(base=0x%04hx, n=0x%04hx)\n",
+ baseport, nports);
+
+ for (port = baseport ;
+ port < endport && port < HD64465_IOMAP_LO_THRESH ;
+ port += (1<<HD64465_IOMAP_LO_SHIFT)) {
+ hd64465_iomap_lo[port>>HD64465_IOMAP_LO_SHIFT] = 0;
+ }
+
+ for (port = MAX(baseport, HD64465_IOMAP_LO_THRESH) ;
+ port < endport && port < HD64465_IOMAP_HI_THRESH ;
+ port += (1<<HD64465_IOMAP_HI_SHIFT)) {
+ hd64465_iomap_hi[port>>HD64465_IOMAP_HI_SHIFT] = 0;
+ }
+}
+EXPORT_SYMBOL(hd64465_port_unmap);
+
+unsigned long hd64465_isa_port2addr(unsigned long port)
+{
+ unsigned long addr = 0;
+ unsigned char shift;
+
+ /* handle remapping of low IO ports */
+ if (port < HD64465_IOMAP_LO_THRESH) {
+ addr = hd64465_iomap_lo[port >> HD64465_IOMAP_LO_SHIFT];
+ shift = hd64465_iomap_lo_shift[port >> HD64465_IOMAP_LO_SHIFT];
+ if (addr != 0)
+ addr += (port & HD64465_IOMAP_LO_MASK) << shift;
+ else
+ printk(KERN_NOTICE "io_hd64465: access to un-mapped port %lx\n", port);
+ } else if (port < HD64465_IOMAP_HI_THRESH) {
+ addr = hd64465_iomap_hi[port >> HD64465_IOMAP_HI_SHIFT];
+ shift = hd64465_iomap_hi_shift[port >> HD64465_IOMAP_HI_SHIFT];
+ if (addr != 0)
+ addr += (port & HD64465_IOMAP_HI_MASK) << shift;
+ else
+ printk(KERN_NOTICE "io_hd64465: access to un-mapped port %lx\n", port);
+ }
+
+ /* HD64465 internal devices (0xb0000000) */
+ else if (port < 0x20000)
+ addr = CONFIG_HD64465_IOBASE + port - 0x10000;
+
+ /* Whole physical address space (0xa0000000) */
+ else
+ addr = P2SEGADDR(port);
+
+ DIPRINTK(2, "PORT2ADDR(0x%08lx) = 0x%08lx\n", port, addr);
+
+ return addr;
+}
+
+static inline void delay(void)
+{
+ ctrl_inw(0xa0000000);
+}
+
+unsigned char hd64465_inb(unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+ unsigned long b = (addr == 0 ? 0 : *(volatile unsigned char*)addr);
+
+ DIPRINTK(0, "inb(%08lx) = %02x\n", addr, (unsigned)b);
+ return b;
+}
+
+unsigned char hd64465_inb_p(unsigned long port)
+{
+ unsigned long v;
+ unsigned long addr = PORT2ADDR(port);
+
+ v = (addr == 0 ? 0 : *(volatile unsigned char*)addr);
+ delay();
+ DIPRINTK(0, "inb_p(%08lx) = %02x\n", addr, (unsigned)v);
+ return v;
+}
+
+unsigned short hd64465_inw(unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+ unsigned long b = (addr == 0 ? 0 : *(volatile unsigned short*)addr);
+ DIPRINTK(0, "inw(%08lx) = %04lx\n", addr, b);
+ return b;
+}
+
+unsigned int hd64465_inl(unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+ unsigned int b = (addr == 0 ? 0 : *(volatile unsigned long*)addr);
+ DIPRINTK(0, "inl(%08lx) = %08x\n", addr, b);
+ return b;
+}
+
+void hd64465_outb(unsigned char b, unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+
+ DIPRINTK(0, "outb(%02x, %08lx)\n", (unsigned)b, addr);
+ if (addr != 0)
+ *(volatile unsigned char*)addr = b;
+}
+
+void hd64465_outb_p(unsigned char b, unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+
+ DIPRINTK(0, "outb_p(%02x, %08lx)\n", (unsigned)b, addr);
+ if (addr != 0)
+ *(volatile unsigned char*)addr = b;
+ delay();
+}
+
+void hd64465_outw(unsigned short b, unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+ DIPRINTK(0, "outw(%04x, %08lx)\n", (unsigned)b, addr);
+ if (addr != 0)
+ *(volatile unsigned short*)addr = b;
+}
+
+void hd64465_outl(unsigned int b, unsigned long port)
+{
+ unsigned long addr = PORT2ADDR(port);
+ DIPRINTK(0, "outl(%08x, %08lx)\n", b, addr);
+ if (addr != 0)
+ *(volatile unsigned long*)addr = b;
+}
+