text: /*
   * 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;
  
  typedef union {
  	unsigned all			: 8;	/* all of the bits together */
  	struct {
  #ifdef __MIPSEB__
  		unsigned HOB		: 1;	/* 48-bit address ordering */
  		unsigned reserved456	: 3;
  		unsigned bit3		: 1;	/* ATA-2 thingy */
  		unsigned SRST		: 1;	/* host soft reset bit */
  		unsigned nIEN		: 1;	/* device INTRQ to host */
  		unsigned bit0		: 1;
  #else
  		unsigned bit0		: 1;
  		unsigned nIEN		: 1;	/* device INTRQ to host */
  		unsigned SRST		: 1;	/* host soft reset bit */
  		unsigned bit3		: 1;	/* ATA-2 thingy */
  		unsigned reserved456	: 3;
  		unsigned HOB		: 1;	/* 48-bit address ordering */
  #endif
  	} b;
  } control_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);
  }
  
  #if defined(CONFIG_SWAP_IO_SPACE_L) && defined(__MIPSEB__)
  
  /* get rid of defs from io.h - ide has its private and conflicting versions */
  #ifdef insw
  #undef insw
  #endif
  #ifdef outsw
  #undef outsw
  #endif
  #ifdef insl
  #undef insl
  #endif
  #ifdef outsl
  #undef outsl
  #endif
  
  #define insw(port, addr, count) ide_insw(port, addr, count)
  #define insl(port, addr, count) ide_insl(port, addr, count)
  #define outsw(port, addr, count) ide_outsw(port, addr, count)
  #define outsl(port, addr, count) ide_outsl(port, addr, count)
  
  static inline void ide_insw(unsigned long port, void *addr, unsigned int count)
  {
  	while (count--) {
  		*(u16 *)addr = *(volatile u16 *)(mips_io_port_base + port);
  		addr += 2;
  	}
  }
  
  static inline void ide_outsw(unsigned long port, void *addr, unsigned int count)
  {
  	while (count--) {
  		*(volatile u16 *)(mips_io_port_base + (port)) = *(u16 *)addr;
  		addr += 2;
  	}
  }
  
  static inline void ide_insl(unsigned long port, void *addr, unsigned int count)
  {
  	while (count--) {
  		*(u32 *)addr = *(volatile u32 *)(mips_io_port_base + port);
  		addr += 4;
  	}
  }
  
  static inline void ide_outsl(unsigned long port, void *addr, unsigned int count)
  {
  	while (count--) {
  		*(volatile u32 *)(mips_io_port_base + (port)) = *(u32 *)addr;
  		addr += 4;
  	}
  }
  
  #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 */
  