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183 lines
6.1 KiB
C
Executable File
183 lines
6.1 KiB
C
Executable File
/*! \file ata.h \brief IDE-ATA hard disk interface driver. */
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//*****************************************************************************
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//
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// File Name : 'ata.h'
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// Title : IDE-ATA interface driver for hard disks
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// Author : Pascal Stang
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// Date : 11/22/2000
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// Revised : 12/29/2000
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// Version : 0.3
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// Target MCU : ATmega103 (should work for Atmel AVR Series)
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// Editor Tabs : 4
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//
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// NOTE: This code is currently below version 1.0, and therefore is considered
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// to be lacking in some functionality or documentation, or may not be fully
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// tested. Nonetheless, you can expect most functions to work.
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//
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// This code is distributed under the GNU Public License
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// which can be found at http://www.gnu.org/licenses/gpl.txt
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//
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//*****************************************************************************
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#ifndef ATA_H
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#define ATA_H
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#include "global.h"
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#include "ataconf.h"
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// constants
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#define DRIVE0 0
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#define STANDBY 0
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#define SLEEP 1
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#define IDLE 2
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// ATA status register bits
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#define ATA_SR_BSY 0x80
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#define ATA_SR_DRDY 0x40
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#define ATA_SR_DF 0x20
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#define ATA_SR_DSC 0x10
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#define ATA_SR_DRQ 0x08
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#define ATA_SR_CORR 0x04
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#define ATA_SR_IDX 0x02
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#define ATA_SR_ERR 0x01
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// ATA error register bits
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#define ATA_ER_UNC 0x40
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#define ATA_ER_MC 0x20
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#define ATA_ER_IDNF 0x10
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#define ATA_ER_MCR 0x08
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#define ATA_ER_ABRT 0x04
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#define ATA_ER_TK0NF 0x02
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#define ATA_ER_AMNF 0x01
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// ATA head register bits
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#define ATA_HEAD_USE_LBA 0x40
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/*
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// ATA registers
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#define ATA_REG_BASE 0x8000
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#define ATA_REG_DATAL 0x00
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#define ATA_REG_ERROR 0x01
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#define ATA_REG_SECCOUNT 0x02
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#define ATA_REG_STARTSEC 0x03
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#define ATA_REG_CYLLO 0x04
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#define ATA_REG_CYLHI 0x05
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#define ATA_REG_HDDEVSEL 0x06
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#define ATA_REG_CMDSTATUS1 0x07
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#define ATA_REG_CMDSTATUS2 0x08
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#define ATA_REG_ACTSTATUS 0x09
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#define ATA_REG_DATAH 0x10
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*/
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// ATA commands
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#define ATA_CMD_READ 0x20
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#define ATA_CMD_READNR 0x21
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#define ATA_CMD_WRITE 0x30
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#define ATA_CMD_WRITENR 0x31
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#define ATA_CMD_IDENTIFY 0xEC
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#define ATA_CMD_RECALIBRATE 0x10
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#define ATA_CMD_SPINDOWN 0xE0 // spin down disk immediately
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#define ATA_CMD_SPINUP 0xE1 // spin up disk immediately
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#define ATA_CMD_STANDBY_5SU 0xE2 // spin down disk and set auto-power-down timer (sectorcount*5sec)
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#define ATA_CMD_IDLE_5SU 0xE3 // keep disk spinning and set auto-power-down timer (sectorcount*5sec)
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#define ATA_CMD_SLEEP 0xE6 // sleep disk (wakeup only on HW or SW reset)
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#define ATA_CMD_STANDBY_01SU 0xF2 // spin down disk and set auto-power-down timer (sectorcount*0.1sec)
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#define ATA_CMD_IDLE_01SU 0xF3 // keep disk spinning and set auto-power-down timer (sectorcount*0.1sec)
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// ATA CHS disk parameters (examples, now we autodetect)
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#define ATA_DISKPARM_CLYS 0x03A6 // number of cylinders per platter
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#define ATA_DISKPARM_HEADS 0x10 // number of heads (usable plater sides)
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#define ATA_DISKPARM_SECTORS 0x11 // number of sectors per head per cylinder
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// ATA Identity fields
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// all offsets refer to word offset (2 byte increments)
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#define ATA_IDENT_DEVICETYPE 0 // specifies ATA/ATAPI, removable/non-removable
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#define ATA_IDENT_CYLINDERS 1 // number of logical cylinders
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#define ATA_IDENT_HEADS 3 // number of logical heads
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#define ATA_IDENT_SECTORS 6 // number of sectors per track
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#define ATA_IDENT_SERIAL 10 // drive model name (20 characters)
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#define ATA_IDENT_MODEL 27 // drive model name (40 characters)
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#define ATA_IDENT_FIELDVALID 53 // indicates field validity of higher words (bit0: words54-58, bit1: words 64-70)
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#define ATA_IDENT_LBASECTORS 60 // number of sectors in LBA translation mode
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// drive mode defines (for ataSetDrivePowerMode() )
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#define ATA_DISKMODE_SPINDOWN 0
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#define ATA_DISKMODE_SPINUP 1
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#define ATA_DISKMODE_SETTIMEOUT 2
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#define ATA_DISKMODE_SLEEP 3
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// typedefs
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// drive info structure
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typedef struct
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{
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unsigned int cylinders;
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unsigned char heads;
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unsigned char sectors;
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unsigned long sizeinsectors;
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unsigned char LBAsupport;
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char model[41];
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} typeDriveInfo;
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// Prototypes
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void ataInit(void);
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void ataDriveInit(void);
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void ataDriveSelect(u08 DriveNo);
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void ataSetDrivePowerMode(u08 DriveNo, u08 mode, u08 timeout);
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u08 ataReadByte(u08 reg);
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void ataWriteByte(u08 reg, u08 data);
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void ataShowRegisters(unsigned char DriveNo);
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u08 ataSWReset(void);
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void ataDiskErr(void);
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void ataPrintSector( u08 *Buffer);
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void ataReadDataBuffer(u08 *Buffer, u16 numBytes);
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void ataWriteDataBuffer(u08 *Buffer, u16 numBytes);
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u08 ataStatusWait(u08 mask, u08 waitStatus);
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// read and write routines for CHS based drives
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unsigned char ataReadSectorsCHS( unsigned char Drive,
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unsigned char Head,
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unsigned int Track,
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unsigned char Sector,
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unsigned int numsectors,
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unsigned char *Buffer);
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unsigned char ataWriteSectorsCHS( unsigned char Drive,
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unsigned char Head,
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unsigned int Track,
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unsigned char Sector,
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unsigned int numsectors,
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unsigned char *Buffer);
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// read and write routines for LBA based drives
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unsigned char ataReadSectorsLBA( unsigned char Drive,
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unsigned long lba,
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unsigned int numsectors,
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unsigned char *Buffer);
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unsigned char ataWriteSectorsLBA( unsigned char Drive,
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unsigned long lba,
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unsigned int numsectors,
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unsigned char *Buffer);
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// generic read and write routines using LBA
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// uses native or translated LBA addressing
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// given autodetected drive type
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unsigned char ataReadSectors( unsigned char Drive,
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unsigned long lba,
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unsigned int numsectors,
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unsigned char *Buffer);
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unsigned char ataWriteSectors( unsigned char Drive,
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unsigned long lba,
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unsigned int numsectors,
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unsigned char *Buffer);
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//unsigned char IdentifyDrive(unsigned char DriveNo, unsigned char *Buffer, tdefDriveInfo *DriveInfo);
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//unsigned char SetMode(unsigned char DriveNo, unsigned char Mode, unsigned char PwrDown);
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//unsigned char ATA_Idle(unsigned char Drive);
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#endif
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