1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/ide/h8300/ide-h8300.c b/drivers/ide/h8300/ide-h8300.c
new file mode 100644
index 000000000000..fb91cb8bf2d2
--- /dev/null
+++ b/drivers/ide/h8300/ide-h8300.c
@@ -0,0 +1,119 @@
+/*
+ * 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");
+}