130 lines
2.5 KiB
C
130 lines
2.5 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 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 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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#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 <= IDE_STATUS_OFFSET; i++)
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hw->io_ports[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
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hw->io_ports[IDE_CONTROL_OFFSET] = 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 inline void hwif_setup(ide_hwif_t *hwif)
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{
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default_hwif_iops(hwif);
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hwif->mmio = 1;
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hwif->OUTW = mm_outw;
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hwif->OUTSW = mm_outsw;
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hwif->INW = mm_inw;
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hwif->INSW = mm_insw;
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hwif->OUTSL = NULL;
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hwif->INSL = NULL;
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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;
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ide_hwif_t *hwif;
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int index;
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u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
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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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hwif = ide_find_port();
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if (hwif == NULL) {
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printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
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return -ENOENT;
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}
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index = hwif->index;
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ide_init_port_data(hwif, index);
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ide_init_port_hw(hwif, &hw);
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hwif_setup(hwif);
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hwif->host_flags = IDE_HFLAG_NO_IO_32BIT;
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printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", index);
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idx[0] = index;
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ide_device_add(idx, NULL);
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return 0;
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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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