| /* |
| * This file is part of the libpayload project. |
| * |
| * Copyright (C) 2012 secunet Security Networks AG |
| * Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com> |
| * |
| * 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. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <libpayload.h> |
| #include <pci.h> |
| #include <storage/ata.h> |
| #include <storage/ahci.h> |
| |
| |
| #include "ahci_private.h" |
| |
| |
| ssize_t ahci_packet_read_cmd(atapi_dev_t *const _dev, |
| const u8 *const cmd, const size_t cmdlen, |
| u8 *const buf, const size_t buflen) |
| { |
| ahci_dev_t *const dev = (ahci_dev_t *)_dev; |
| |
| if ((cmdlen != 12) && (cmdlen != 16)) { |
| printf("ahci: Only 12- and 16-byte packet commands allowed.\n"); |
| return -1; |
| } |
| |
| const size_t len = ahci_cmdslot_prepare(dev, buf, buflen, 0); |
| u16 byte_limit = MIN(len, 63 * 1024); /* like Linux */ |
| if (byte_limit & 1) ++byte_limit; /* even limit */ |
| |
| dev->cmdlist[0].cmd |= CMD_ATAPI; |
| dev->cmdtable->fis[0] = FIS_HOST_TO_DEVICE; |
| dev->cmdtable->fis[1] = FIS_H2D_CMD; |
| dev->cmdtable->fis[2] = ATA_PACKET; |
| dev->cmdtable->fis[5] = byte_limit & 0xff; |
| dev->cmdtable->fis[6] = byte_limit >> 8; |
| memcpy((void *)dev->cmdtable->atapi_cmd, cmd, cmdlen); |
| |
| return ahci_cmdslot_exec(dev); |
| } |