217 lines
5.6 KiB
C
217 lines
5.6 KiB
C
/*
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* H8/300 generic IDE interface
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*/
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#include <linux/init.h>
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#include <linux/ide.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#define DRV_NAME "ide-h8300"
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#define bswap(d) \
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({ \
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u16 r; \
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__asm__("mov.b %w1,r1h\n\t" \
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"mov.b %x1,r1l\n\t" \
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"mov.w r1,%0" \
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:"=r"(r) \
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:"r"(d) \
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:"er1"); \
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(r); \
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})
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static void mm_outw(u16 d, unsigned long a)
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{
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__asm__("mov.b %w0,r2h\n\t"
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"mov.b %x0,r2l\n\t"
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"mov.w r2,@%1"
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:
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:"r"(d),"r"(a)
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:"er2");
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}
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static u16 mm_inw(unsigned long a)
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{
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register u16 r __asm__("er0");
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__asm__("mov.w @%1,r2\n\t"
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"mov.b r2l,%x0\n\t"
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"mov.b r2h,%w0"
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:"=r"(r)
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:"r"(a)
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:"er2");
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return r;
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}
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static void h8300_tf_load(ide_drive_t *drive, ide_task_t *task)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct ide_io_ports *io_ports = &hwif->io_ports;
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struct ide_taskfile *tf = &task->tf;
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u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
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if (task->ftf_flags & IDE_FTFLAG_FLAGGED)
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HIHI = 0xFF;
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if (task->ftf_flags & IDE_FTFLAG_OUT_DATA)
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mm_outw((tf->hob_data << 8) | tf->data, io_ports->data_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
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outb(tf->hob_feature, io_ports->feature_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
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outb(tf->hob_nsect, io_ports->nsect_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
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outb(tf->hob_lbal, io_ports->lbal_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
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outb(tf->hob_lbam, io_ports->lbam_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
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outb(tf->hob_lbah, io_ports->lbah_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
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outb(tf->feature, io_ports->feature_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
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outb(tf->nsect, io_ports->nsect_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
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outb(tf->lbal, io_ports->lbal_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
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outb(tf->lbam, io_ports->lbam_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
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outb(tf->lbah, io_ports->lbah_addr);
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if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
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outb((tf->device & HIHI) | drive->select,
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io_ports->device_addr);
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}
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static void h8300_tf_read(ide_drive_t *drive, ide_task_t *task)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct ide_io_ports *io_ports = &hwif->io_ports;
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struct ide_taskfile *tf = &task->tf;
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if (task->ftf_flags & IDE_FTFLAG_IN_DATA) {
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u16 data = mm_inw(io_ports->data_addr);
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tf->data = data & 0xff;
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tf->hob_data = (data >> 8) & 0xff;
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}
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/* be sure we're looking at the low order bits */
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outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
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if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
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tf->feature = inb(io_ports->feature_addr);
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if (task->tf_flags & IDE_TFLAG_IN_NSECT)
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tf->nsect = inb(io_ports->nsect_addr);
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if (task->tf_flags & IDE_TFLAG_IN_LBAL)
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tf->lbal = inb(io_ports->lbal_addr);
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if (task->tf_flags & IDE_TFLAG_IN_LBAM)
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tf->lbam = inb(io_ports->lbam_addr);
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if (task->tf_flags & IDE_TFLAG_IN_LBAH)
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tf->lbah = inb(io_ports->lbah_addr);
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if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
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tf->device = inb(io_ports->device_addr);
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if (task->tf_flags & IDE_TFLAG_LBA48) {
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outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
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if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
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tf->hob_feature = inb(io_ports->feature_addr);
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if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
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tf->hob_nsect = inb(io_ports->nsect_addr);
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if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
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tf->hob_lbal = inb(io_ports->lbal_addr);
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if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
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tf->hob_lbam = inb(io_ports->lbam_addr);
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if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
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tf->hob_lbah = inb(io_ports->lbah_addr);
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}
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}
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static void mm_outsw(unsigned long addr, void *buf, u32 len)
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{
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unsigned short *bp = (unsigned short *)buf;
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for (; len > 0; len--, bp++)
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*(volatile u16 *)addr = bswap(*bp);
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}
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static void mm_insw(unsigned long addr, void *buf, u32 len)
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{
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unsigned short *bp = (unsigned short *)buf;
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for (; len > 0; len--, bp++)
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*bp = bswap(*(volatile u16 *)addr);
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}
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static void h8300_input_data(ide_drive_t *drive, struct request *rq,
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void *buf, unsigned int len)
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{
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mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
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}
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static void h8300_output_data(ide_drive_t *drive, struct request *rq,
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void *buf, unsigned int len)
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{
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mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
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}
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static const struct ide_tp_ops h8300_tp_ops = {
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.exec_command = ide_exec_command,
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.read_status = ide_read_status,
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.read_altstatus = ide_read_altstatus,
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.set_irq = ide_set_irq,
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.tf_load = h8300_tf_load,
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.tf_read = h8300_tf_read,
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.input_data = h8300_input_data,
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.output_data = h8300_output_data,
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};
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#define H8300_IDE_GAP (2)
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static inline void hw_setup(hw_regs_t *hw)
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{
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int i;
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memset(hw, 0, sizeof(hw_regs_t));
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for (i = 0; i <= 7; i++)
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hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
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hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
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hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
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hw->chipset = ide_generic;
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}
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static const struct ide_port_info h8300_port_info = {
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.tp_ops = &h8300_tp_ops,
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.host_flags = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
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};
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static int __init h8300_ide_init(void)
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{
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hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
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printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
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if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
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goto out_busy;
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if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
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release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
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goto out_busy;
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}
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hw_setup(&hw);
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return ide_host_add(&h8300_port_info, hws, NULL);
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out_busy:
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printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
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return -EBUSY;
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}
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module_init(h8300_ide_init);
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MODULE_LICENSE("GPL");
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