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/*
* 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_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 h8300_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_io_ports *io_ports = &hwif->io_ports;
struct ide_taskfile *tf = &cmd->tf;
u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
HIHI = 0xFF;
if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA)
mm_outw((tf->hob_data << 8) | tf->data, io_ports->data_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
outb(tf->hob_feature, io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
outb(tf->hob_nsect, io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
outb(tf->hob_lbal, io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
outb(tf->hob_lbam, io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
outb(tf->hob_lbah, io_ports->lbah_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
outb(tf->feature, io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
outb(tf->nsect, io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
outb(tf->lbal, io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
outb(tf->lbam, io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
outb(tf->lbah, io_ports->lbah_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
outb((tf->device & HIHI) | drive->select,
io_ports->device_addr);
}
static void h8300_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_io_ports *io_ports = &hwif->io_ports;
struct ide_taskfile *tf = &cmd->tf;
if (cmd->ftf_flags & IDE_FTFLAG_IN_DATA) {
u16 data = mm_inw(io_ports->data_addr);
tf->data = data & 0xff;
tf->hob_data = (data >> 8) & 0xff;
}
/* be sure we're looking at the low order bits */
outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
tf->feature = inb(io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
tf->nsect = inb(io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
tf->lbal = inb(io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
tf->lbam = inb(io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
tf->lbah = inb(io_ports->lbah_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
tf->device = inb(io_ports->device_addr);
if (cmd->tf_flags & IDE_TFLAG_LBA48) {
outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
tf->hob_feature = inb(io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
tf->hob_nsect = inb(io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
tf->hob_lbal = inb(io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
tf->hob_lbam = inb(io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
tf->hob_lbah = inb(io_ports->lbah_addr);
}
}
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,
.tf_load = h8300_tf_load,
.tf_read = h8300_tf_read,
.input_data = h8300_input_data,
.output_data = h8300_output_data,
};
#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 <= 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;
hw->chipset = ide_generic;
}
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,
};
static int __init h8300_ide_init(void)
{
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
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, 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");
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