ide.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:6k
- /*
- * 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.
- *
- * This file contains the MIPS architecture specific IDE code.
- *
- * Copyright (C) 1994-1996 Linus Torvalds & authors
- */
- #ifndef __ASM_IDE_H
- #define __ASM_IDE_H
- #ifdef __KERNEL__
- #include <linux/config.h>
- #include <asm/io.h>
- #ifndef MAX_HWIFS
- # ifdef CONFIG_BLK_DEV_IDEPCI
- #define MAX_HWIFS 10
- # else
- #define MAX_HWIFS 6
- # endif
- #endif
- #define ide__sti() __sti()
- struct ide_ops {
- int (*ide_default_irq)(ide_ioreg_t base);
- ide_ioreg_t (*ide_default_io_base)(int index);
- void (*ide_init_hwif_ports)(hw_regs_t *hw, ide_ioreg_t data_port,
- ide_ioreg_t ctrl_port, int *irq);
- int (*ide_request_irq)(unsigned int irq, void (*handler)(int, void *,
- struct pt_regs *), unsigned long flags,
- const char *device, void *dev_id);
- void (*ide_free_irq)(unsigned int irq, void *dev_id);
- int (*ide_check_region) (ide_ioreg_t from, unsigned int extent);
- void (*ide_request_region)(ide_ioreg_t from, unsigned int extent,
- const char *name);
- void (*ide_release_region)(ide_ioreg_t from, unsigned int extent);
- };
- extern struct ide_ops *ide_ops;
- static __inline__ int ide_default_irq(ide_ioreg_t base)
- {
- return ide_ops->ide_default_irq(base);
- }
- static __inline__ ide_ioreg_t ide_default_io_base(int index)
- {
- return ide_ops->ide_default_io_base(index);
- }
- static inline void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port,
- ide_ioreg_t ctrl_port, int *irq)
- {
- ide_ops->ide_init_hwif_ports(hw, data_port, ctrl_port, irq);
- }
- static __inline__ void ide_init_default_hwifs(void)
- {
- #ifndef CONFIG_BLK_DEV_IDEPCI
- hw_regs_t hw;
- int index;
- for(index = 0; index < MAX_HWIFS; index++) {
- ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
- hw.irq = ide_default_irq(ide_default_io_base(index));
- ide_register_hw(&hw, NULL);
- }
- #endif /* CONFIG_BLK_DEV_IDEPCI */
- }
- typedef union {
- unsigned all : 8; /* all of the bits together */
- struct {
- #ifdef __MIPSEB__
- unsigned bit7 : 1; /* always 1 */
- unsigned lba : 1; /* using LBA instead of CHS */
- unsigned bit5 : 1; /* always 1 */
- unsigned unit : 1; /* drive select number, 0 or 1 */
- unsigned head : 4; /* always zeros here */
- #else
- unsigned head : 4; /* always zeros here */
- unsigned unit : 1; /* drive select number, 0 or 1 */
- unsigned bit5 : 1; /* always 1 */
- unsigned lba : 1; /* using LBA instead of CHS */
- unsigned bit7 : 1; /* always 1 */
- #endif
- } b;
- } select_t;
- static __inline__ int ide_request_irq(unsigned int irq, void (*handler)(int,void *, struct pt_regs *),
- unsigned long flags, const char *device, void *dev_id)
- {
- return ide_ops->ide_request_irq(irq, handler, flags, device, dev_id);
- }
- static __inline__ void ide_free_irq(unsigned int irq, void *dev_id)
- {
- ide_ops->ide_free_irq(irq, dev_id);
- }
- static __inline__ int ide_check_region (ide_ioreg_t from, unsigned int extent)
- {
- return ide_ops->ide_check_region(from, extent);
- }
- static __inline__ void ide_request_region(ide_ioreg_t from,
- unsigned int extent, const char *name)
- {
- ide_ops->ide_request_region(from, extent, name);
- }
- static __inline__ void ide_release_region(ide_ioreg_t from,
- unsigned int extent)
- {
- ide_ops->ide_release_region(from, extent);
- }
- #undef SUPPORT_VLB_SYNC
- #define SUPPORT_VLB_SYNC 0
- #if defined(__MIPSEB__)
- #define T_CHAR (0x0000) /* char: don't touch */
- #define T_SHORT (0x4000) /* short: 12 -> 21 */
- #define T_INT (0x8000) /* int: 1234 -> 4321 */
- #define T_TEXT (0xc000) /* text: 12 -> 21 */
- #define T_MASK_TYPE (0xc000)
- #define T_MASK_COUNT (0x3fff)
- #define D_CHAR(cnt) (T_CHAR | (cnt))
- #define D_SHORT(cnt) (T_SHORT | (cnt))
- #define D_INT(cnt) (T_INT | (cnt))
- #define D_TEXT(cnt) (T_TEXT | (cnt))
- static u_short driveid_types[] = {
- D_SHORT(10), /* config - vendor2 */
- D_TEXT(20), /* serial_no */
- D_SHORT(3), /* buf_type - ecc_bytes */
- D_TEXT(48), /* fw_rev - model */
- D_CHAR(2), /* max_multsect - vendor3 */
- D_SHORT(1), /* dword_io */
- D_CHAR(2), /* vendor4 - capability */
- D_SHORT(1), /* reserved50 */
- D_CHAR(4), /* vendor5 - tDMA */
- D_SHORT(4), /* field_valid - cur_sectors */
- D_INT(1), /* cur_capacity */
- D_CHAR(2), /* multsect - multsect_valid */
- D_INT(1), /* lba_capacity */
- D_SHORT(194) /* dma_1word - reservedyy */
- };
- #define num_driveid_types (sizeof(driveid_types)/sizeof(*driveid_types))
- static __inline__ void ide_fix_driveid(struct hd_driveid *id)
- {
- u_char *p = (u_char *)id;
- int i, j, cnt;
- u_char t;
- for (i = 0; i < num_driveid_types; i++) {
- cnt = driveid_types[i] & T_MASK_COUNT;
- switch (driveid_types[i] & T_MASK_TYPE) {
- case T_CHAR:
- p += cnt;
- break;
- case T_SHORT:
- for (j = 0; j < cnt; j++) {
- t = p[0];
- p[0] = p[1];
- p[1] = t;
- p += 2;
- }
- break;
- case T_INT:
- for (j = 0; j < cnt; j++) {
- t = p[0];
- p[0] = p[3];
- p[3] = t;
- t = p[1];
- p[1] = p[2];
- p[2] = t;
- p += 4;
- }
- break;
- case T_TEXT:
- for (j = 0; j < cnt; j += 2) {
- t = p[0];
- p[0] = p[1];
- p[1] = t;
- p += 2;
- }
- break;
- };
- }
- }
- #else /* defined(CONFIG_SWAP_IO_SPACE) && defined(__MIPSEB__) */
- #define ide_fix_driveid(id) do {} while (0)
- #endif
- /*
- * The following are not needed for the non-m68k ports
- */
- #define ide_ack_intr(hwif) (1)
- #define ide_release_lock(lock) do {} while (0)
- #define ide_get_lock(lock, hdlr, data) do {} while (0)
- #endif /* __KERNEL__ */
- #endif /* __ASM_IDE_H */