diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/ide/h8300 | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/ide/h8300')
-rw-r--r-- | drivers/ide/h8300/ide-h8300.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/ide/h8300/ide-h8300.c b/drivers/ide/h8300/ide-h8300.c new file mode 100644 index 000000000000..fb91cb8bf2d2 --- /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"); +} |