1da177e4c3
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!
119 lines
2.3 KiB
C
119 lines
2.3 KiB
C
/*
|
|
* drivers/ide/ide-h8300.c
|
|
* H8/300 generic IDE interface
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/config.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->OUTL = NULL;
|
|
hwif->INL = NULL;
|
|
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");
|
|
}
|