1 /* 2 * 3 * Copyright (C) 2012 secunet Security Networks AG 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _STORAGE_ATA_H 30 #define _STORAGE_ATA_H 31 32 #include <stdint.h> 33 34 #include "storage.h" 35 36 /* ATA commands */ 37 enum { 38 ATA_READ_DMA = 0xc8, 39 ATA_READ_DMA_EXT = 0x25, 40 ATA_IDENTIFY_DEVICE = 0xec, 41 ATA_PACKET = 0xa0, 42 ATA_IDENTIFY_PACKET_DEVICE = 0xa1, 43 }; 44 45 /* 16-bit-word indices into id structure from ATA_IDENTIFY_DEVICE */ 46 enum { 47 ATA_CMDS_AND_FEATURE_SETS = 82, 48 ATA_ID_SECTOR_SIZE = 106, 49 ATA_ID_LOGICAL_SECTOR_SIZE = 117, 50 }; 51 52 #define DEFAULT_ATA_SECTOR_SIZE 512 53 54 struct ata_dev; 55 typedef struct ata_dev { 56 storage_dev_t storage_dev; 57 58 int (*identify)(struct ata_dev *, u8 *buf); 59 ssize_t (*read_sectors)(struct ata_dev *, lba_t start, size_t count, u8 *buf); 60 61 u8 read_cmd; 62 u8 identify_cmd; 63 size_t sector_size; 64 size_t sector_size_shift; 65 66 void (*detach_device)(struct ata_dev *); 67 } ata_dev_t; 68 69 int ata_attach_device(ata_dev_t *, storage_port_t); 70 71 char *ata_strncpy(char *dest, const u16 *src, size_t n); 72 int ata_set_sector_size(ata_dev_t *, u32 sector_size); 73 void ata_initialize_storage_ops(ata_dev_t *); 74 75 #endif 76