q40ide.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:2k
- /*
- * linux/drivers/ide/q40ide.c -- Q40 I/O port IDE Driver
- *
- * (c) Richard Zidlicky
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- *
- *
- */
- #include <linux/types.h>
- #include <linux/mm.h>
- #include <linux/interrupt.h>
- #include <linux/blkdev.h>
- #include <linux/hdreg.h>
- #include <linux/ide.h>
- /*
- * Bases of the IDE interfaces
- */
- #define Q40IDE_NUM_HWIFS 2
- #define PCIDE_BASE1 0x1f0
- #define PCIDE_BASE2 0x170
- #define PCIDE_BASE3 0x1e8
- #define PCIDE_BASE4 0x168
- #define PCIDE_BASE5 0x1e0
- #define PCIDE_BASE6 0x160
- static const q40ide_ioreg_t pcide_bases[Q40IDE_NUM_HWIFS] = {
- PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4 , PCIDE_BASE5,
- PCIDE_BASE6 */
- };
- /*
- * Offsets from one of the above bases
- */
- /* HD_DATA was redefined in asm-m68k/ide.h */
- #undef HD_DATA
- #define HD_DATA 0x1f0
- #define PCIDE_REG(x) ((q40ide_ioreg_t)(HD_##x-PCIDE_BASE1))
- static const int pcide_offsets[IDE_NR_PORTS] = {
- PCIDE_REG(DATA), PCIDE_REG(ERROR), PCIDE_REG(NSECTOR), PCIDE_REG(SECTOR),
- PCIDE_REG(LCYL), PCIDE_REG(HCYL), PCIDE_REG(CURRENT), PCIDE_REG(STATUS),
- PCIDE_REG(CMD)
- };
- static int q40ide_default_irq(q40ide_ioreg_t base)
- {
- switch (base) {
- case 0x1f0: return 14;
- case 0x170: return 15;
- case 0x1e8: return 11;
- default:
- return 0;
- }
- }
- /*
- * Probe for Q40 IDE interfaces
- */
- void q40ide_init(void)
- {
- int i;
- if (!MACH_IS_Q40)
- return ;
- for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
- hw_regs_t hw;
- ide_setup_ports(&hw,(ide_ioreg_t) pcide_bases[i], (int *)pcide_offsets,
- pcide_bases[i]+0x206,
- 0, NULL, q40ide_default_irq(pcide_bases[i]));
- ide_register_hw(&hw, NULL);
- }
- }