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https://github.com/gbowne1/ClassicOS.git
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Gregory Bowne
23cb50a73f
implement the base ata pio mode driver so that the filesystems like fat16, fat32 work. This is the header for that. It will need a iso9660 driver for cdrom etc optical media
44 lines
1006 B
C
44 lines
1006 B
C
#ifndef ATA_H
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#define ATA_H
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#include <stdint.h>
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#include <stdbool.h>
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/* ATA I/O ports */
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#define ATA_PRIMARY_IO 0x1F0
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#define ATA_PRIMARY_CTRL 0x3F6
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/* ATA registers */
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#define ATA_REG_DATA 0x00
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#define ATA_REG_ERROR 0x01
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#define ATA_REG_FEATURES 0x01
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#define ATA_REG_SECCOUNT0 0x02
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#define ATA_REG_LBA0 0x03
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#define ATA_REG_LBA1 0x04
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#define ATA_REG_LBA2 0x05
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#define ATA_REG_HDDEVSEL 0x06
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#define ATA_REG_COMMAND 0x07
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#define ATA_REG_STATUS 0x07
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/* ATA commands */
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#define ATA_CMD_READ_PIO 0x20
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#define ATA_CMD_WRITE_PIO 0x30
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#define ATA_CMD_IDENTIFY 0xEC
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/* Status flags */
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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_DRQ 0x08
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#define ATA_SR_ERR 0x01
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/* Drive select */
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#define ATA_MASTER 0x00
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#define ATA_SLAVE 0x10
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/* Public API */
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bool ata_init(void);
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bool ata_read_sector(uint32_t lba, uint8_t* buffer);
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bool ata_write_sector(uint32_t lba, const uint8_t* buffer);
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#endif
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