mirror of
https://github.com/LIV2/lide.device.git
synced 2025-12-06 00:32:45 +00:00
Matt Harlum
45db8c4b21
* Optimizations for size etc * Make endskip actually skip to the end * Save last ATA Error * Remove need for divide by using right shifts
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
#ifndef _ATA_H
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#define _ATA_H
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#include <stdbool.h>
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#include "device.h"
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#define MAX_TRANSFER_SECTORS 255 // Max amount of sectors to transfer per read/write command
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#if MAX_TRANSFER_SECTORS > 256
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#error "MAX_TRANSFER_SECTORS cannot be larger than 256"
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#endif
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#define CHANNEL_0 0x1000
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#define CHANNEL_1 0x2000
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#define NEXT_REG 0x200
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// BYTE Offsets
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#define ata_reg_data 0x000
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#define ata_reg_error 0x200
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#define ata_reg_features 0x200
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#define ata_reg_sectorCount 0x400
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#define ata_reg_lbaLow 0x600
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#define ata_reg_lbaMid 0x800
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#define ata_reg_lbaHigh 0xA00
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#define ata_reg_devHead 0xC00
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#define ata_reg_status 0xE00
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#define ata_reg_command 0xE00
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#define drv_sel_secondary (1<<4)
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#define ata_flag_busy (1<<7)
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#define ata_flag_ready (1<<6)
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#define ata_flag_drq (1<<3)
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#define ata_flag_error (1<<0)
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#define ATA_CMD_IDENTIFY 0xEC
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#define ATA_CMD_READ 0x20
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#define ATA_CMD_WRITE 0x30
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// Identify data word offsets
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#define ata_identify_cylinders 1
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#define ata_identify_heads 3
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#define ata_identify_sectorsize 5
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#define ata_identify_sectors 6
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#define ata_identify_serial 10
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#define ata_identify_fw_rev 23
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#define ata_identify_model 27
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#define ata_identify_capabilities 49
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#define ata_identify_logical_sectors 60
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#define ata_identify_pio_modes 64
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#define ata_capability_lba (1<<9)
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#define ata_capability_dma (1<<8)
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enum xfer_dir {
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READ,
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WRITE
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};
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bool ata_init_unit(struct IDEUnit *);
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bool ata_identify(struct IDEUnit *, UWORD *);
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BYTE ata_transfer(void *buffer, ULONG lba, ULONG count, ULONG *actual, struct IDEUnit *unit, enum xfer_dir);
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void read_fast (void *, void *);
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void write_fast (void *, void *);
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#endif |