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ata.h
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
*
* Values for ATA / PATA devices
*/
#pragma once
#define ATA_SR_BSY 0x80
#define ATA_SR_DRDY 0x40
#define ATA_SR_DF 0x20
#define ATA_SR_DSC 0x10
#define ATA_SR_DRQ 0x08
#define ATA_SR_CORR 0x04
#define ATA_SR_IDX 0x02
#define ATA_SR_ERR 0x01
#define ATA_ER_BBK 0x80
#define ATA_ER_UNC 0x40
#define ATA_ER_MC 0x20
#define ATA_ER_IDNF 0x10
#define ATA_ER_MCR 0x08
#define ATA_ER_ABRT 0x04
#define ATA_ER_TK0NF 0x02
#define ATA_ER_AMNF 0x01
#define ATA_CMD_READ_PIO 0x20
#define ATA_CMD_READ_PIO_EXT 0x24
#define ATA_CMD_READ_DMA 0xC8
#define ATA_CMD_READ_DMA_EXT 0x25
#define ATA_CMD_WRITE_PIO 0x30
#define ATA_CMD_WRITE_PIO_EXT 0x34
#define ATA_CMD_WRITE_DMA 0xCA
#define ATA_CMD_WRITE_DMA_EXT 0x35
#define ATA_CMD_CACHE_FLUSH 0xE7
#define ATA_CMD_CACHE_FLUSH_EXT 0xEA
#define ATA_CMD_PACKET 0xA0
#define ATA_CMD_IDENTIFY_PACKET 0xA1
#define ATA_CMD_IDENTIFY 0xEC
#define ATAPI_CMD_READ 0xA8
#define ATAPI_CMD_EJECT 0x1B
#define ATA_IDENT_DEVICETYPE 0
#define ATA_IDENT_CYLINDERS 2
#define ATA_IDENT_HEADS 6
#define ATA_IDENT_SECTORS 12
#define ATA_IDENT_SERIAL 20
#define ATA_IDENT_MODEL 54
#define ATA_IDENT_CAPABILITIES 98
#define ATA_IDENT_FIELDVALID 106
#define ATA_IDENT_MAX_LBA 120
#define ATA_IDENT_COMMANDSETS 164
#define ATA_IDENT_MAX_LBA_EXT 200
#define IDE_ATA 0x00
#define IDE_ATAPI 0x01
#define ATA_MASTER 0x00
#define ATA_SLAVE 0x01
#define ATA_REG_DATA 0x00
#define ATA_REG_ERROR 0x01
#define ATA_REG_FEATURES 0x01
#define ATA_REG_SECCOUNT0 0x02
#define ATA_REG_LBA0 0x03
#define ATA_REG_LBA1 0x04
#define ATA_REG_LBA2 0x05
#define ATA_REG_HDDEVSEL 0x06
#define ATA_REG_COMMAND 0x07
#define ATA_REG_STATUS 0x07
#define ATA_REG_SECCOUNT1 0x08
#define ATA_REG_LBA3 0x09
#define ATA_REG_LBA4 0x0A
#define ATA_REG_LBA5 0x0B
#define ATA_REG_CONTROL 0x0C
#define ATA_REG_ALTSTATUS 0x0C
#define ATA_REG_DEVADDRESS 0x0D
// Channels:
#define ATA_PRIMARY 0x00
#define ATA_SECONDARY 0x01
// Directions:
#define ATA_READ 0x00
#define ATA_WRITE 0x01
typedef struct {
uint16_t base;
uint16_t ctrl;
uint16_t bmide;
uint16_t nien;
} ide_channel_regs_t;
typedef struct {
uint8_t reserved;
uint8_t channel;
uint8_t drive;
uint16_t type;
uint16_t signature;
uint16_t capabilities;
uint32_t command_sets;
uint32_t size;
uint8_t model[41];
} ide_device_t;
typedef struct {
uint8_t status;
uint8_t chs_first_sector[3];
uint8_t type;
uint8_t chs_last_sector[3];
uint32_t lba_first_sector;
uint32_t sector_count;
} partition_t;
typedef struct {
uint16_t flags;
uint16_t unused1[9];
char serial[20];
uint16_t unused2[3];
char firmware[8];
char model[40];
uint16_t sectors_per_int;
uint16_t unused3;
uint16_t capabilities[2];
uint16_t unused4[2];
uint16_t valid_ext_data;
uint16_t unused5[5];
uint16_t size_of_rw_mult;
uint32_t sectors_28;
uint16_t unused6[38];
uint64_t sectors_48;
uint16_t unused7[152];
} __attribute__((packed)) ata_identify_t;
typedef struct {
uint8_t boostrap[446];
partition_t partitions[4];
uint8_t signature[2];
} __attribute__((packed)) mbr_t;
struct ata_device {
int io_base;
int control;
int slave;
int is_atapi;
ata_identify_t identity;
unsigned int atapi_lba;
unsigned int atapi_sector_size;
};
typedef union {
uint8_t command_bytes[12];
uint16_t command_words[6];
} atapi_command_t;