1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief SD Card LibI2C driver. |
---|
5 | */ |
---|
6 | |
---|
7 | /* |
---|
8 | * Copyright (c) 2008 |
---|
9 | * Embedded Brains GmbH |
---|
10 | * Obere Lagerstr. 30 |
---|
11 | * D-82178 Puchheim |
---|
12 | * Germany |
---|
13 | * rtems@embedded-brains.de |
---|
14 | * |
---|
15 | * The license and distribution terms for this file may be found in the file |
---|
16 | * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE. |
---|
17 | */ |
---|
18 | |
---|
19 | #ifndef LIBI2C_SD_CARD_H |
---|
20 | #define LIBI2C_SD_CARD_H |
---|
21 | |
---|
22 | #include <stdint.h> |
---|
23 | #include <stdbool.h> |
---|
24 | |
---|
25 | #include <rtems/libi2c.h> |
---|
26 | |
---|
27 | #ifdef __cplusplus |
---|
28 | extern "C" { |
---|
29 | #endif /* __cplusplus */ |
---|
30 | |
---|
31 | #define SD_CARD_IDLE_TOKEN 0xff |
---|
32 | |
---|
33 | /** |
---|
34 | * 1 idle token before command |
---|
35 | * 6 bytes for the command |
---|
36 | * 1 to 8 bytes for response start (N_CR) |
---|
37 | * 1 to 2 bytes for response |
---|
38 | * 1 idle token after command (minimum N_RC) |
---|
39 | */ |
---|
40 | #define SD_CARD_COMMAND_SIZE 18 |
---|
41 | |
---|
42 | #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 } |
---|
43 | |
---|
44 | #define SD_CARD_COMMAND_DEFAULT { \ |
---|
45 | SD_CARD_IDLE_TOKEN, \ |
---|
46 | 0x40, 0, 0, 0, 0, 0x95, \ |
---|
47 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
---|
48 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
---|
49 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
---|
50 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
---|
51 | SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \ |
---|
52 | SD_CARD_IDLE_TOKEN \ |
---|
53 | } |
---|
54 | |
---|
55 | #define SD_CARD_N_AC_MAX_DEFAULT 8 |
---|
56 | |
---|
57 | typedef struct { |
---|
58 | rtems_libi2c_drv_t driver; |
---|
59 | int table_index; |
---|
60 | rtems_device_minor_number minor; |
---|
61 | const char *device_name; |
---|
62 | const char *disk_device_name; |
---|
63 | rtems_libi2c_tfr_mode_t transfer_mode; |
---|
64 | uint8_t command [SD_CARD_COMMAND_SIZE]; |
---|
65 | uint8_t response [SD_CARD_COMMAND_SIZE]; |
---|
66 | int response_index; |
---|
67 | uint32_t n_ac_max; |
---|
68 | uint32_t block_number; |
---|
69 | uint32_t block_size; |
---|
70 | uint32_t block_size_shift; |
---|
71 | bool busy; |
---|
72 | bool verbose; |
---|
73 | bool schedule_if_busy; |
---|
74 | } sd_card_driver_entry; |
---|
75 | |
---|
76 | extern const rtems_driver_address_table sd_card_driver_ops; |
---|
77 | |
---|
78 | extern sd_card_driver_entry sd_card_driver_table []; |
---|
79 | |
---|
80 | #ifdef __cplusplus |
---|
81 | } |
---|
82 | #endif /* __cplusplus */ |
---|
83 | |
---|
84 | #endif /* LIBI2C_SD_CARD_H */ |
---|