This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / ide / h8300 / ide-h8300.c

diff --git a/drivers/ide/h8300/ide-h8300.c b/drivers/ide/h8300/ide-h8300.c
new file mode 100644 (file)
index 0000000..fb91cb8
--- /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");
+}