1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief SD Card LibI2C driver. |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2008 |
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9 | * Embedded Brains GmbH |
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10 | * Obere Lagerstr. 30 |
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11 | * D-82178 Puchheim |
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12 | * Germany |
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13 | * rtems@embedded-brains.de |
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14 | * |
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15 | * The license and distribution terms for this file may be |
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16 | * found in the file LICENSE in this distribution or at |
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17 | * http://www.rtems.org/license/LICENSE. |
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18 | */ |
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19 | |
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20 | #ifndef LIBI2C_SD_CARD_H |
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21 | #define LIBI2C_SD_CARD_H |
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22 | |
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23 | #include <stdint.h> |
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24 | #include <stdbool.h> |
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25 | |
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26 | #include <rtems/libi2c.h> |
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27 | |
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28 | #ifdef __cplusplus |
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29 | extern "C" { |
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30 | #endif /* __cplusplus */ |
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31 | |
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32 | #define SD_CARD_IDLE_TOKEN 0xff |
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33 | |
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34 | /** |
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35 | * 1 idle token before command |
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36 | * 6 bytes for the command |
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37 | * 1 to 8 bytes for response start (N_CR) |
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38 | * 1 to 2 bytes for response |
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39 | * 1 idle token after command (minimum N_RC) |
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40 | */ |
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41 | #define SD_CARD_COMMAND_SIZE 18 |
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42 | |
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43 | #define SD_CARD_TRANSFER_MODE_DEFAULT { .baudrate = 400000, .bits_per_char = 8, .lsb_first = FALSE, .clock_inv = FALSE, .clock_phs = FALSE, .idle_char = SD_CARD_IDLE_TOKEN } |
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44 | |
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45 | #define SD_CARD_COMMAND_DEFAULT { \ |
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46 | SD_CARD_IDLE_TOKEN, \ |
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47 | 0x40, 0, 0, 0, 0, 0x95, \ |
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48 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
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49 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
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50 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
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51 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
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52 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
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53 | SD_CARD_IDLE_TOKEN \ |
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54 | } |
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55 | |
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56 | /* Default speed = 400kbps, default timeout = 100ms, n_ac_max is in bytes */ |
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57 | #define SD_CARD_N_AC_MAX_DEFAULT 5000 |
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58 | |
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59 | typedef struct { |
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60 | const char *device_name; |
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61 | rtems_device_minor_number bus; |
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62 | rtems_libi2c_tfr_mode_t transfer_mode; |
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63 | uint8_t command [SD_CARD_COMMAND_SIZE]; |
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64 | uint8_t response [SD_CARD_COMMAND_SIZE]; |
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65 | int response_index; |
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66 | uint32_t n_ac_max; |
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67 | uint32_t block_number; |
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68 | uint32_t block_size; |
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69 | uint32_t block_size_shift; |
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70 | bool busy; |
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71 | bool verbose; |
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72 | bool schedule_if_busy; |
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73 | uint32_t retries; |
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74 | } sd_card_driver_entry; |
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75 | |
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76 | extern sd_card_driver_entry sd_card_driver_table []; |
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77 | |
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78 | extern size_t sd_card_driver_table_size; |
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79 | |
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80 | rtems_status_code sd_card_register( void); |
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81 | |
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82 | #ifdef __cplusplus |
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83 | } |
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84 | #endif /* __cplusplus */ |
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85 | |
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86 | #endif /* LIBI2C_SD_CARD_H */ |
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