1/*
  2 * H8/300 generic IDE interface
  3 */
  4
  5#include <linux/init.h>
  6#include <linux/ide.h>
  7
  8#include <asm/io.h>
  9#include <asm/irq.h>
 10
 11#define DRV_NAME "ide-h8300"
 12
 13#define bswap(d) \
 14({					\
 15	u16 r;				\
 16	__asm__("mov.b %w1,r1h\n\t"	\
 17		"mov.b %x1,r1l\n\t"	\
 18		"mov.w r1,%0"		\
 19		:"=r"(r)		\
 20		:"r"(d)			\
 21		:"er1");		\
 22	(r);				\
 23})
 24
 25static void mm_outsw(unsigned long addr, void *buf, u32 len)
 26{
 27	unsigned short *bp = (unsigned short *)buf;
 28	for (; len > 0; len--, bp++)
 29		*(volatile u16 *)addr = bswap(*bp);
 30}
 31
 32static void mm_insw(unsigned long addr, void *buf, u32 len)
 33{
 34	unsigned short *bp = (unsigned short *)buf;
 35	for (; len > 0; len--, bp++)
 36		*bp = bswap(*(volatile u16 *)addr);
 37}
 38
 39static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
 40			     void *buf, unsigned int len)
 41{
 42	mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 43}
 44
 45static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
 46			      void *buf, unsigned int len)
 47{
 48	mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 49}
 50
 51static const struct ide_tp_ops h8300_tp_ops = {
 52	.exec_command		= ide_exec_command,
 53	.read_status		= ide_read_status,
 54	.read_altstatus		= ide_read_altstatus,
 55	.write_devctl		= ide_write_devctl,
 56
 57	.dev_select		= ide_dev_select,
 58	.tf_load		= ide_tf_load,
 59	.tf_read		= ide_tf_read,
 60
 61	.input_data		= h8300_input_data,
 62	.output_data		= h8300_output_data,
 63};
 64
 65#define H8300_IDE_GAP (2)
 66
 67static inline void hw_setup(struct ide_hw *hw)
 68{
 69	int i;
 70
 71	memset(hw, 0, sizeof(*hw));
 72	for (i = 0; i <= 7; i++)
 73		hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
 74	hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
 75	hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
 76}
 77
 78static const struct ide_port_info h8300_port_info = {
 79	.tp_ops			= &h8300_tp_ops,
 80	.host_flags		= IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
 81	.chipset		= ide_generic,
 82};
 83
 84static int __init h8300_ide_init(void)
 85{
 86	struct ide_hw hw, *hws[] = { &hw };
 87
 88	printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
 89
 90	if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
 91		goto out_busy;
 92	if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
 93		release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
 94		goto out_busy;
 95	}
 96
 97	hw_setup(&hw);
 98
 99	return ide_host_add(&h8300_port_info, hws, 1, NULL);
100
101out_busy:
102	printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
103
104	return -EBUSY;
105}
106
107module_init(h8300_ide_init);
108
109MODULE_LICENSE("GPL");