patch-2.4.6 linux/arch/sh/kernel/io_bigsur.c

• Lines: 250
• Date: Wed Jun 27 13:55:29 2001
• Orig file: v2.4.5/linux/arch/sh/kernel/io_bigsur.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/arch/sh/kernel/io_bigsur.c linux/arch/sh/kernel/io_bigsur.c
@@ -0,0 +1,249 @@
+/*
+ * include/asm-sh/io_bigsur.c
+ *
+ * By Dustin McIntire (dustin@sensoria.com) (c)2001
+ * Derived from io_hd64465.h, which bore the message:
+ * By Greg Banks <gbanks@pocketpenguins.com>
+ * (c) 2000 PocketPenguins Inc. 
+ * and from io_hd64461.h, which bore the message:
+ * Copyright 2000 Stuart Menefy (stuart.menefy@st.com)
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * IO functions for a Hitachi Big Sur Evaluation Board.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/machvec.h>
+#include <asm/io.h>
+#include <asm/bigsur.h>
+
+//#define BIGSUR_DEBUG 2
+#undef BIGSUR_DEBUG
+
+#ifdef BIGSUR_DEBUG
+#define DPRINTK(args...)	printk(args)
+#define DIPRINTK(n, args...)	if (BIGSUR_DEBUG>(n)) printk(args)
+#else
+#define DPRINTK(args...)
+#define DIPRINTK(n, args...)
+#endif
+
+
+/* Low iomap maps port 0-1K to addresses in 8byte chunks */
+#define BIGSUR_IOMAP_LO_THRESH 0x400
+#define BIGSUR_IOMAP_LO_SHIFT	3
+#define BIGSUR_IOMAP_LO_MASK	((1<<BIGSUR_IOMAP_LO_SHIFT)-1)
+#define BIGSUR_IOMAP_LO_NMAP	(BIGSUR_IOMAP_LO_THRESH>>BIGSUR_IOMAP_LO_SHIFT)
+static u32 bigsur_iomap_lo[BIGSUR_IOMAP_LO_NMAP];
+static u8 bigsur_iomap_lo_shift[BIGSUR_IOMAP_LO_NMAP];
+
+/* High iomap maps port 1K-64K to addresses in 1K chunks */
+#define BIGSUR_IOMAP_HI_THRESH 0x10000
+#define BIGSUR_IOMAP_HI_SHIFT	10
+#define BIGSUR_IOMAP_HI_MASK	((1<<BIGSUR_IOMAP_HI_SHIFT)-1)
+#define BIGSUR_IOMAP_HI_NMAP	(BIGSUR_IOMAP_HI_THRESH>>BIGSUR_IOMAP_HI_SHIFT)
+static u32 bigsur_iomap_hi[BIGSUR_IOMAP_HI_NMAP];
+static u8 bigsur_iomap_hi_shift[BIGSUR_IOMAP_HI_NMAP];
+
+#ifndef MAX
+#define MAX(a,b)    ((a)>(b)?(a):(b))
+#endif
+
+#define PORT2ADDR(x) (sh_mv.mv_isa_port2addr(x))
+
+void bigsur_port_map(u32 baseport, u32 nports, u32 addr, u8 shift)
+{
+    u32 port, endport = baseport + nports;
+
+    DPRINTK("bigsur_port_map(base=0x%0x, n=0x%0x, addr=0x%08x)\n",
+	    baseport, nports, addr);
+	    
+	for (port = baseport ;
+	     port < endport && port < BIGSUR_IOMAP_LO_THRESH ;
+	     port += (1<<BIGSUR_IOMAP_LO_SHIFT)) {
+	    	DPRINTK("    maplo[0x%x] = 0x%08x\n", port, addr);
+    	    bigsur_iomap_lo[port>>BIGSUR_IOMAP_LO_SHIFT] = addr;
+    	    bigsur_iomap_lo_shift[port>>BIGSUR_IOMAP_LO_SHIFT] = shift;
+	    	addr += (1<<(BIGSUR_IOMAP_LO_SHIFT));
+	}
+
+	for (port = MAX(baseport, BIGSUR_IOMAP_LO_THRESH) ;
+	     port < endport && port < BIGSUR_IOMAP_HI_THRESH ;
+	     port += (1<<BIGSUR_IOMAP_HI_SHIFT)) {
+	    	DPRINTK("    maphi[0x%x] = 0x%08x\n", port, addr);
+    	    bigsur_iomap_hi[port>>BIGSUR_IOMAP_HI_SHIFT] = addr;
+    	    bigsur_iomap_hi_shift[port>>BIGSUR_IOMAP_HI_SHIFT] = shift;
+	    	addr += (1<<(BIGSUR_IOMAP_HI_SHIFT));
+	}
+}
+EXPORT_SYMBOL(bigsur_port_map);
+
+void bigsur_port_unmap(u32 baseport, u32 nports)
+{
+    u32 port, endport = baseport + nports;
+	
+    DPRINTK("bigsur_port_unmap(base=0x%0x, n=0x%0x)\n", baseport, nports);
+
+	for (port = baseport ;
+	     port < endport && port < BIGSUR_IOMAP_LO_THRESH ;
+	     port += (1<<BIGSUR_IOMAP_LO_SHIFT)) {
+    	    bigsur_iomap_lo[port>>BIGSUR_IOMAP_LO_SHIFT] = 0;
+	}
+
+	for (port = MAX(baseport, BIGSUR_IOMAP_LO_THRESH) ;
+	     port < endport && port < BIGSUR_IOMAP_HI_THRESH ;
+	     port += (1<<BIGSUR_IOMAP_HI_SHIFT)) {
+    	    bigsur_iomap_hi[port>>BIGSUR_IOMAP_HI_SHIFT] = 0;
+	}
+}
+EXPORT_SYMBOL(bigsur_port_unmap);
+
+unsigned long bigsur_isa_port2addr(unsigned long port)
+{
+    unsigned long addr = 0;
+	unsigned char shift;
+
+	/* Physical address not in P0, do nothing */
+	if (PXSEG(port)) addr = port;
+	/* physical address in P0, map to P2 */
+	else if (port >= 0x30000)
+	    addr = P2SEGADDR(port);
+	/* Big Sur I/O + HD64465 registers 0x10000-0x30000 */
+	else if (port >= BIGSUR_IOMAP_HI_THRESH)
+	    addr = BIGSUR_INTERNAL_BASE + (port - BIGSUR_IOMAP_HI_THRESH);
+	/* Handle remapping of high IO/PCI IO ports */
+	else if (port >= BIGSUR_IOMAP_LO_THRESH) {
+	    addr = bigsur_iomap_hi[port >> BIGSUR_IOMAP_HI_SHIFT];
+	    shift = bigsur_iomap_hi_shift[port >> BIGSUR_IOMAP_HI_SHIFT];
+	    if (addr != 0)
+		    addr += (port & BIGSUR_IOMAP_HI_MASK) << shift;
+	}
+	/* Handle remapping of low IO ports */
+	else {
+	    addr = bigsur_iomap_lo[port >> BIGSUR_IOMAP_LO_SHIFT];
+	    shift = bigsur_iomap_lo_shift[port >> BIGSUR_IOMAP_LO_SHIFT];
+	    if (addr != 0)
+	    	addr += (port & BIGSUR_IOMAP_LO_MASK) << shift;
+	}
+
+    DIPRINTK(2, "PORT2ADDR(0x%08lx) = 0x%08lx\n", port, addr);
+
+	return addr;
+}
+
+static inline void delay(void)
+{
+	ctrl_inw(0xa0000000);
+}
+
+unsigned char bigsur_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 bigsur_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 bigsur_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 bigsur_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 bigsur_insb(unsigned long port, void *buffer, unsigned long count)
+{
+	unsigned char *buf=buffer;
+	while(count--) *buf++=inb(port);
+}
+
+void bigsur_insw(unsigned long port, void *buffer, unsigned long count)
+{
+	unsigned short *buf=buffer;
+	while(count--) *buf++=inw(port);
+}
+
+void bigsur_insl(unsigned long port, void *buffer, unsigned long count)
+{
+	unsigned long *buf=buffer;
+	while(count--) *buf++=inl(port);
+}
+
+void bigsur_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 bigsur_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 bigsur_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 bigsur_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;
+}
+
+void bigsur_outsb(unsigned long port, const void *buffer, unsigned long count)
+{
+	const unsigned char *buf=buffer;
+	while(count--) outb(*buf++, port);
+}
+
+void bigsur_outsw(unsigned long port, const void *buffer, unsigned long count)
+{
+	const unsigned short *buf=buffer;
+	while(count--) outw(*buf++, port);
+}
+
+void bigsur_outsl(unsigned long port, const void *buffer, unsigned long count)
+{
+	const unsigned long *buf=buffer;
+	while(count--) outl(*buf++, port);
+}
+