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   1 /*
   2  * Copyright © 2013 Keith Packard <keithp@keithp.com>
   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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #ifndef _AO_SDCARD_H_
  19 #define _AO_SDCARD_H_
  20
  21 uint8_t
  22 ao_sdcard_read_block(uint32_t block, uint8_t *data);
  23
  24 uint8_t
  25 ao_sdcard_write_block(uint32_t block, uint8_t *data);
  26
  27 void
  28 ao_sdcard_init(void);
  29
  30 /* Commands */
  31 #define SDCARD_GO_IDLE_STATE            0
  32 #define SDCARD_SEND_OP_COND             1
  33 #define SDCARD_SEND_IF_COND             8
  34 #define SDCARD_SEND_CSD                 9
  35 #define SDCARD_SEND_CID                 10
  36 #define SDCARD_SEND_STATUS              13
  37 #define SDCARD_SET_BLOCKLEN             16
  38 #define SDCARD_READ_BLOCK               17
  39 #define SDCARD_WRITE_BLOCK              24
  40 #define SDCARD_WRITE_MULTIPLE_BLOCK     25
  41 #define SDCARD_ERASE_WR_BLK_START       32
  42 #define SDCARD_ERASE_WR_BLK_END         33
  43 #define SDCARD_ERASE                    38
  44 #define SDCARD_APP_CMD                  55
  45 #define SDCARD_READ_OCR                 58
  46
  47 /* App commands */
  48 #define SDCARD_APP_SET_WR_BLK_ERASE_COUNT       23
  49 #define SDCARD_APP_SEND_OP_COMD                 41
  50
  51 /* Status */
  52 #define SDCARD_STATUS_READY_STATE       0x00
  53 #define SDCARD_STATUS_IDLE_STATE        0x01
  54 #define SDCARD_STATUS_ERASE_RESET       0x02
  55 #define SDCARD_STATUS_ILLEGAL_COMMAND   0x04
  56 #define SDCARD_STATUS_COM_CRC_ERROR     0x08
  57 #define SDCARD_STATUS_ERASE_SEQ_ERROR   0x10
  58 #define SDCARD_STATUS_ADDRESS_ERROR     0x20
  59 #define SDCARD_STATUS_PARAMETER_ERROR   0x40
  60 #define SDCARD_STATUS_TIMEOUT           0xff
  61
  62 #define SDCARD_DATA_START_BLOCK         0xfe
  63 #define SDCARD_STOP_TRAN_TOKEN          0xfd
  64 #define SDCARD_WRITE_MULTIPLE_TOKEN     0xfc
  65 #define SDCARD_DATA_RES_MASK            0x1f
  66 #define SDCARD_DATA_RES_ACCEPTED        0x05
  67
  68 #define SDCARD_CMD_TIMEOUT              AO_MS_TO_TICKS(20)
  69 #define SDCARD_BUSY_TIMEOUT             AO_MS_TO_TICKS(20)
  70 #define SDCARD_BLOCK_TIMEOUT            AO_MS_TO_TICKS(200)
  71 #define SDCARD_IDLE_RETRY               10
  72 #define SDCARD_OP_COND_RETRY            10
  73
  74 enum ao_sdtype {
  75         ao_sdtype_unknown,
  76         ao_sdtype_mmc3,
  77         ao_sdtype_sd1,
  78         ao_sdtype_sd2byte,
  79         ao_sdtype_sd2block,
  80 };
  81
  82 #endif /* _AO_SDCARD_H_ */