1 // Low level ATA disk definitions
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU GPLv3 license.
11 #include "types.h" // u16
14 struct ata_pio_command {
32 // Function definitions
33 void ata_reset(u16 device);
34 int ata_transfer(struct ata_pio_command *cmd);
35 int ata_cmd_packet(u16 device, u8 *cmdbuf, u8 cmdlen
36 , u16 header, u32 length, void *far_buffer);
37 int cdrom_read(u16 device, u32 lba, u32 count
38 , void *far_buffer, u16 skip);
42 ata_cmd_data(u16 biosid, u16 command, u32 lba, u16 count, void *far_buffer)
44 u8 slave = biosid % 2;
46 struct ata_pio_command cmd;
47 cmd.far_buffer = far_buffer;
50 if (count >= (1<<8) || lba + count >= (1<<28)) {
51 cmd.sector_count2 = count >> 8;
52 cmd.lba_low2 = lba >> 24;
61 cmd.sector_count = count;
63 cmd.lba_mid = lba >> 8;
64 cmd.lba_high = lba >> 16;
65 cmd.device = ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
66 | ((lba >> 24) & 0xf) | ATA_CB_DH_LBA);
67 cmd.command = command;
68 return ata_transfer(&cmd);