k-chow/k/include/k/atapi.h
Julien CLEMENT d0f6a2592b fix: coding style
Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
2021-07-12 18:01:40 +02:00

88 lines
2.0 KiB
C

#ifndef ATAPI_H_
#define ATAPI_H_
# include <k/compiler.h>
# include <k/types.h>
/* Device Control Registers */
# define PRIMARY_DCR 0x3F6
# define SECONDARY_DCR 0x376
/* DCR bits */
# define INTERRUPT_DISABLE (1 << 1)
# define SRST (1 << 2)
/* Drive selection bytes */
# define ATA_PORT_MASTER 0x00
# define ATA_PORT_SLAVE 0x10
/* ATA bus IO ports */
# define PRIMARY_REG 0x1F0
# define SECONDARY_REG 0x170
/* ATA I/O registers */
# define ATA_REG_DATA(PORT) (PORT)
# define ATA_REG_FEATURES(PORT) ((PORT) + 1)
# define ATA_REG_ERROR_INFO(PORT) ((PORT) + 1)
# define ATA_REG_SECTOR_COUNT(PORT) ((PORT) + 2)
# define ATA_REG_SECTOR_NB(PORT) ((PORT) + 3)
# define ATA_REG_LBA_LO(PORT) ((PORT) + 3)
# define ATA_REG_CYLINDER_LOW(PORT) ((PORT) + 4)
# define ATA_REG_LBA_MI(PORT) ((PORT) + 4)
# define ATA_REG_CYLINDER_HIGH(PORT) ((PORT) + 5)
# define ATA_REG_LBA_HI(PORT) ((PORT) + 5)
# define ATA_REG_DRIVE(PORT) ((PORT) + 6)
# define ATA_REG_HEAD(PORT) ((PORT) + 6)
# define ATA_REG_COMMAND(PORT) ((PORT) + 7)
# define ATA_REG_STATUS(PORT) ((PORT) + 7)
/* Status bits */
# define ERR (1 << 0)
# define DRQ (1 << 3)
# define SRV (1 << 4)
# define DF (1 << 5)
# define RDY (1 << 6)
# define BSY (1 << 7)
# define ABRT (1 << 2)
/* ATAPI signature */
# define ATAPI_SIG_SC 0x01
# define ATAPI_SIG_LBA_LO 0x01
# define ATAPI_SIG_LBA_MI 0x14
# define ATAPI_SIG_LBA_HI 0xEB
/* ATA commands */
# define IDENTIFY_PACKET_DEVICE 0xA1
# define PACKET 0xA0
/* SCSI commands */
# define READ_12 0xA8
# define DPO (1 << 4)
# define ATAPI_BLK_CACHE_SZ 256
# define CD_BLOCK_SZ 2048
# define PACKET_SZ 12
# define PACKET_AWAIT_COMMAND 1
# define PACKET_DATA_TRANSMIT 2
# define PACKET_COMMAND_COMPLETE 3
struct SCSI_packet {
u8 op_code;
u8 flags_lo;
u8 lba_hi;
u8 lba_mihi;
u8 lba_milo;
u8 lba_lo;
u8 transfer_length_hi;
u8 transfer_length_mihi;
u8 transfer_length_milo;
u8 transfer_length_lo;
u8 flags_hi;
u8 control;
} __packed;
#endif /* !ATAPI_H_ */