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