You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
2.4 KiB
109 lines
2.4 KiB
/*
|
|
* 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(struct ide_hw *hw)
|
|
{
|
|
int i;
|
|
|
|
memset(hw, 0, sizeof(*hw));
|
|
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;
|
|
}
|
|
|
|
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,
|
|
.chipset = ide_generic,
|
|
};
|
|
|
|
static int __init h8300_ide_init(void)
|
|
{
|
|
struct ide_hw hw, *hws[] = { &hw };
|
|
|
|
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, 1, 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");
|
|
|