110 lines
2.4 KiB
C
110 lines
2.4 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_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 ide_cmd *cmd,
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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 ide_cmd *cmd,
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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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.write_devctl = ide_write_devctl,
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.dev_select = ide_dev_select,
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.tf_load = ide_tf_load,
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.tf_read = ide_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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