diff options
Diffstat (limited to 'payloads/libpayload/drivers/storage/ahci_atapi.c')
| -rw-r--r-- | payloads/libpayload/drivers/storage/ahci_atapi.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/storage/ahci_atapi.c b/payloads/libpayload/drivers/storage/ahci_atapi.c new file mode 100644 index 0000000000..11305c22c3 --- /dev/null +++ b/payloads/libpayload/drivers/storage/ahci_atapi.c @@ -0,0 +1,67 @@ +/* + * 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); +} |