1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/ide/ide-h8300.c b/drivers/ide/ide-h8300.c
new file mode 100644
index 00000000..520f42c5
--- /dev/null
+++ b/drivers/ide/ide-h8300.c
@@ -0,0 +1,109 @@
+/*
+ * 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");