1 /*
2    Copyright (C) 2010, 2012, 2017 Rocky Bernstein <rocky@gnu.org>
3 
4    This program is free software: you can redistribute it and/or modify
5    it under the terms of the GNU General Public License as published by
6    the Free Software Foundation, either version 3 of the License, or
7    (at your option) any later version.
8 
9    This program is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License
15    along with this program.  If not, see <http://www.gnu.org/licenses/>.
16 */
17 
18 #ifndef CDIO_DRIVER_MMC_CMD_HELPER_H_
19 #define CDIO_DRIVER_MMC_CMD_HELPER_H_
20 
21 /* Boilerplate initialization code to setup running MMC command.  We
22    assume variables 'p_cdio', 'p_buf', and 'i_size' are previously
23    defined.  It does the following:
24 
25    1. Defines a cdb variable,
26    2. zeros cdb variable
27    3  Checks to see if we have a cdio object and can run an MMC command
28    4. Sets up the command field of cdb to passed in value mmc_cmd.
29 */
30 #define MMC_CMD_SETUP(mmc_cmd)                                          \
31     mmc_cdb_t cdb = {{0, }};                                            \
32                                                                         \
33     if ( ! p_cdio ) return DRIVER_OP_UNINIT;                            \
34     if ( ! p_cdio->op.run_mmc_cmd ) return DRIVER_OP_UNSUPPORTED;       \
35                                                                         \
36     CDIO_MMC_SET_COMMAND(cdb.field, mmc_cmd)
37 
38 /* Boilerplate initialization code to setup running MMC read command
39    needs to set the cdb 16-bit length field. See above
40    comment for MMC_CMD_SETUP.
41 */
42 #define MMC_CMD_SETUP_READ16(mmc_cmd)                                   \
43     MMC_CMD_SETUP(mmc_cmd);                                             \
44                                                                         \
45     /* Setup to read header, to get length of data */                   \
46     CDIO_MMC_SET_READ_LENGTH16(cdb.field, i_size)
47 
48 /* Boilerplate code to run a MMC command.
49 
50    We assume variables 'p_cdio', 'mmc_timeout_ms', 'cdb', 'i_size' and
51    'p_buf' are defined previously.
52 
53    'direction' is the SCSI direction (read, write, none) of the
54    command.
55 */
56 #define MMC_RUN_CMD(direction, i_timeout)                               \
57     p_cdio->op.run_mmc_cmd(p_cdio->env,                                 \
58         i_timeout,                                                      \
59         mmc_get_cmd_len(cdb.field[0]),                                  \
60         &cdb,                                                           \
61         direction, i_size, p_buf)
62 
63 #endif /* CDIO_DRIVER_MMC_CMD_HELPER_H_ */
64