io_bigsur.c
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上传日期:2013-04-10
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- /*
- * 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%08xn", 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%08xn", 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%08lxn", 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) = %02xn", 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) = %02xn", 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) = %04lxn", 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) = %08xn", 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);
- }