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/*
* drivers/ide/h8300/ide-h8300.c
* H8/300 generic IDE interface
*/
#include <linux/init.h>
#include <linux/ide.h>
#include <asm/io.h>
#include <asm/irq.h>
#define bswap(d) \
({ \
u16 r; \
__asm__("mov.b %w1,r1h\n\t" \
"mov.b %x1,r1l\n\t" \
"mov.w r1,%0" \
:"=r"(r) \
:"r"(d) \
:"er1"); \
(r); \
})
static void mm_outw(u16 d, unsigned long a)
{
__asm__("mov.b %w0,r2h\n\t"
"mov.b %x0,r2l\n\t"
"mov.w r2,@%1"
:
:"r"(d),"r"(a)
:"er2");
}
static u16 mm_inw(unsigned long a)
{
register u16 r __asm__("er0");
__asm__("mov.w @%1,r2\n\t"
"mov.b r2l,%x0\n\t"
"mov.b r2h,%w0"
:"=r"(r)
:"r"(a)
:"er2");
return r;
}
static void mm_outsw(unsigned long addr, void *buf, u32 len)
{
unsigned short *bp = (unsigned short *)buf;
for (; len > 0; len--, bp++)
*(volatile u16 *)addr = bswap(*bp);
}
static void mm_insw(unsigned long addr, void *buf, u32 len)
{
unsigned short *bp = (unsigned short *)buf;
for (; len > 0; len--, bp++)
*bp = bswap(*(volatile u16 *)addr);
}
#define H8300_IDE_GAP (2)
static inline void hw_setup(hw_regs_t *hw)
{
int i;
memset(hw, 0, sizeof(hw_regs_t));
for (i = 0; i <= IDE_STATUS_OFFSET; i++)
hw->io_ports[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
hw->io_ports[IDE_CONTROL_OFFSET] = CONFIG_H8300_IDE_ALT;
hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
hw->dma = NO_DMA;
hw->chipset = ide_generic;
}
static inline void hwif_setup(ide_hwif_t *hwif)
{
default_hwif_iops(hwif);
hwif->mmio = 2;
hwif->OUTW = mm_outw;
hwif->OUTSW = mm_outsw;
hwif->INW = mm_inw;
hwif->INSW = mm_insw;
hwif->OUTSL = NULL;
hwif->INSL = NULL;
}
void __init h8300_ide_init(void)
{
hw_regs_t hw;
ide_hwif_t *hwif;
int idx;
if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
goto out_busy;
if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
goto out_busy;
}
hw_setup(&hw);
/* register if */
idx = ide_register_hw(&hw, &hwif);
if (idx == -1) {
printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
return;
}
hwif_setup(hwif);
printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", idx);
return;
out_busy:
printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
}
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