diff options
author | Nico Huber <nico.huber@secunet.com> | 2012-08-30 15:36:57 +0200 |
---|---|---|
committer | Peter Stuge <peter@stuge.se> | 2012-10-27 02:52:58 +0200 |
commit | 1f6bd94fa8e683f83887f6847295d45a4d4f3731 (patch) | |
tree | ad4f31ed218d5512f741745537951d61a3f46689 /payloads/libpayload/include/storage/ata.h | |
parent | 7baadac40364cdbf20c2add19f2aac678d3b603a (diff) |
libpayload: New AHCI, ATA and ATAPI drivers
This adds a new interface for storage devices. A driver for ATA and
ATAPI drives on AHCI host controllers comes along.
The interface is very simple and was designed to match FILO's needs.
It consists of three functions:
void storage_initialize(void);
Initializes controllers. Should be called once at startup.
storage_poll_t storage_probe(size_t dev_num);
with typedef enum {
POLL_NO_DEVICE = -2,
POLL_ERROR = -1,
POLL_NO_MEDIUM = 0,
POLL_MEDIUM_PRESENT = 1,
} storage_poll_t;
Looks for a drive with number dev_num (drives are counted from
zero) and polls for a medium in the drive if appropriate.
int storage_read_blocks512(size_t dev_num,
u64 start, size_t count,
unsigned char *buf);
Reads count blocks of 512 bytes from block start of drive dev_num
into buf.
Change-Id: I1c85796b7f8e379ff3817a61b1837636b57e182b
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1622
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Peter Stuge <peter@stuge.se>
Diffstat (limited to 'payloads/libpayload/include/storage/ata.h')
-rw-r--r-- | payloads/libpayload/include/storage/ata.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/payloads/libpayload/include/storage/ata.h b/payloads/libpayload/include/storage/ata.h new file mode 100644 index 0000000000..c8422490e3 --- /dev/null +++ b/payloads/libpayload/include/storage/ata.h @@ -0,0 +1,77 @@ +/* + * This file is part of the libpayload project. + * + * Copyright (C) 2012 secunet Security Networks AG + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef _STORAGE_ATA_H +#define _STORAGE_ATA_H + +#include <stdint.h> + +#include "storage.h" + + +/* ATA commands */ +enum { + ATA_READ_DMA = 0xc8, + ATA_READ_DMA_EXT = 0x25, + ATA_IDENTIFY_DEVICE = 0xec, + ATA_PACKET = 0xa0, + ATA_IDENTIFY_PACKET_DEVICE = 0xa1, +}; + +/* 16-bit-word indices into id structure from ATA_IDENTIFY_DEVICE */ +enum { + ATA_CMDS_AND_FEATURE_SETS = 82, + ATA_ID_SECTOR_SIZE = 106, + ATA_ID_LOGICAL_SECTOR_SIZE = 117, +}; + +#define DEFAULT_ATA_SECTOR_SIZE 512 + +struct ata_dev; +typedef struct ata_dev { + storage_dev_t storage_dev; + + int (*identify)(struct ata_dev *, u8 *buf); + ssize_t (*read_sectors)(struct ata_dev *, lba_t start, size_t count, u8 *buf); + + u8 read_cmd; + u8 identify_cmd; + size_t sector_size; + size_t sector_size_shift; + + void (*detach_device)(struct ata_dev *); +} ata_dev_t; + +int ata_attach_device(ata_dev_t *, storage_port_t); + +char *ata_strncpy(char *dest, const u16 *src, size_t n); +int ata_set_sector_size(ata_dev_t *, u32 sector_size); +void ata_initialize_storage_ops(ata_dev_t *); + +#endif |