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/*
* H8/300 generic IDE interface
*/
#include <linux/init.h>
#include <linux/ide.h>
#include <asm/io.h>
#include <asm/irq.h>
#define DRV_NAME "ide-h8300"
#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_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);
}
static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
}
static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
}
static const struct ide_tp_ops h8300_tp_ops = {
.exec_command = ide_exec_command,
.read_status = ide_read_status,
.read_altstatus = ide_read_altstatus,
.write_devctl = ide_write_devctl,
.dev_select = ide_dev_select,
.tf_load = ide_tf_load,
.tf_read = ide_tf_read,
.input_data = h8300_input_data,
.output_data = h8300_output_data,
};
#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 <= 7; i++)
hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
hw->chipset = ide_generic;
}
static const struct ide_port_info h8300_port_info = {
.tp_ops = &h8300_tp_ops,
.host_flags = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
};
static int __init h8300_ide_init(void)
{
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
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);
return ide_host_add(&h8300_port_info, hws, NULL);
out_busy:
printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
return -EBUSY;
}
module_init(h8300_ide_init);
MODULE_LICENSE("GPL");
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