rk/include/kernel/ide.h

#ifndef RK_IDE_H_
#define RK_IDE_H_

#include <stdint.h>

enum IDE_MODE {
    ISA_ONLY                             = 0x00,
    PCI_ONLY                             = 0x05,
    ISA_CAN_SWITCH                       = 0x0a,
    PCI_CAN_SWITCH                       = 0x0f,
    ISA_ONLY_BUS_MASTERING               = 0x80,
    PCI_ONLY_BUS_MASTERING               = 0x85,
    ISA_CAN_SWITCH_BUS_MASTERING         = 0x8a,
    PCI_CAN_SWITCH_BUS_MASTERING         = 0x8f,
};

#define ATA_PRIMARY   0
#define ATA_SECONDARY 1
#define ATA_MASTER    0
#define ATA_SLAVE     1

#define ATA_PRIMARY_IO   0x1F0
#define ATA_SECONDARY_IO 0x170

#define ATA_PRIMARY_DCR_AS   0x3F6
#define ATA_SECONDARY_DCR_AS 0x376

#define ATA_PRIMARY_IRQ   14
#define ATA_SECONDARY_IRQ 15

#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

#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 ATA_SR_BSY     0x80    // Busy
#define ATA_SR_DRDY    0x40    // Drive ready
#define ATA_SR_DF      0x20    // Drive write fault
#define ATA_SR_DSC     0x10    // Drive seek complete
#define ATA_SR_DRQ     0x08    // Data request ready
#define ATA_SR_CORR    0x04    // Corrected data
#define ATA_SR_IDX     0x02    // Index
#define ATA_SR_ERR     0x01    // Error

#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

uint16_t ide_select_drive(uint8_t bus, uint8_t drive);
uint8_t ide_identify(uint8_t bus, uint8_t drive, uint16_t *ide_buf);
uint8_t ata_read_sector(uint8_t bus, uint8_t drive, uint32_t lba, uint8_t *buf);

#endif