Daiki Kato / sd-driver-hs

High-speed access version sd-driver.

Dependents:   SDBlockDevice_GR_PEACH SDBlockDevice_GR_PEACH HagridOS5

This library has modified SDBlockDevice.h based on revision "14: c7dba87" of sd-driver.
https://github.com/ARMmbed/sd-driver

features/filesystem/sd/SDBlockDevice.cpp@0:b22a1df967cb, 2017-03-23 (annotated)

Committer:
dkato
Date:
Thu Mar 23 08:25:54 2017 +0000
Revision:
0:b22a1df967cb
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:b22a1df967cb 1 /* mbed Microcontroller Library
dkato 0:b22a1df967cb 2 * Copyright (c) 2006-2012 ARM Limited
dkato 0:b22a1df967cb 3 *
dkato 0:b22a1df967cb 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
dkato 0:b22a1df967cb 5 * of this software and associated documentation files (the "Software"), to deal
dkato 0:b22a1df967cb 6 * in the Software without restriction, including without limitation the rights
dkato 0:b22a1df967cb 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
dkato 0:b22a1df967cb 8 * copies of the Software, and to permit persons to whom the Software is
dkato 0:b22a1df967cb 9 * furnished to do so, subject to the following conditions:
dkato 0:b22a1df967cb 10 *
dkato 0:b22a1df967cb 11 * The above copyright notice and this permission notice shall be included in
dkato 0:b22a1df967cb 12 * all copies or substantial portions of the Software.
dkato 0:b22a1df967cb 13 *
dkato 0:b22a1df967cb 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dkato 0:b22a1df967cb 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dkato 0:b22a1df967cb 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
dkato 0:b22a1df967cb 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dkato 0:b22a1df967cb 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
dkato 0:b22a1df967cb 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
dkato 0:b22a1df967cb 20 * SOFTWARE.
dkato 0:b22a1df967cb 21 */
dkato 0:b22a1df967cb 22 /* Introduction
dkato 0:b22a1df967cb 23 * ------------
dkato 0:b22a1df967cb 24 * SD and MMC cards support a number of interfaces, but common to them all
dkato 0:b22a1df967cb 25 * is one based on SPI. This is the one I'm implmenting because it means
dkato 0:b22a1df967cb 26 * it is much more portable even though not so performant, and we already
dkato 0:b22a1df967cb 27 * have the mbed SPI Interface!
dkato 0:b22a1df967cb 28 *
dkato 0:b22a1df967cb 29 * The main reference I'm using is Chapter 7, "SPI Mode" of:
dkato 0:b22a1df967cb 30 * http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf
dkato 0:b22a1df967cb 31 *
dkato 0:b22a1df967cb 32 * SPI Startup
dkato 0:b22a1df967cb 33 * -----------
dkato 0:b22a1df967cb 34 * The SD card powers up in SD mode. The SPI interface mode is selected by
dkato 0:b22a1df967cb 35 * asserting CS low and sending the reset command (CMD0). The card will
dkato 0:b22a1df967cb 36 * respond with a (R1) response.
dkato 0:b22a1df967cb 37 *
dkato 0:b22a1df967cb 38 * CMD8 is optionally sent to determine the voltage range supported, and
dkato 0:b22a1df967cb 39 * indirectly determine whether it is a version 1.x SD/non-SD card or
dkato 0:b22a1df967cb 40 * version 2.x. I'll just ignore this for now.
dkato 0:b22a1df967cb 41 *
dkato 0:b22a1df967cb 42 * ACMD41 is repeatedly issued to initialise the card, until "in idle"
dkato 0:b22a1df967cb 43 * (bit 0) of the R1 response goes to '0', indicating it is initialised.
dkato 0:b22a1df967cb 44 *
dkato 0:b22a1df967cb 45 * You should also indicate whether the host supports High Capicity cards,
dkato 0:b22a1df967cb 46 * and check whether the card is high capacity - i'll also ignore this
dkato 0:b22a1df967cb 47 *
dkato 0:b22a1df967cb 48 * SPI Protocol
dkato 0:b22a1df967cb 49 * ------------
dkato 0:b22a1df967cb 50 * The SD SPI protocol is based on transactions made up of 8-bit words, with
dkato 0:b22a1df967cb 51 * the host starting every bus transaction by asserting the CS signal low. The
dkato 0:b22a1df967cb 52 * card always responds to commands, data blocks and errors.
dkato 0:b22a1df967cb 53 *
dkato 0:b22a1df967cb 54 * The protocol supports a CRC, but by default it is off (except for the
dkato 0:b22a1df967cb 55 * first reset CMD0, where the CRC can just be pre-calculated, and CMD8)
dkato 0:b22a1df967cb 56 * I'll leave the CRC off I think!
dkato 0:b22a1df967cb 57 *
dkato 0:b22a1df967cb 58 * Standard capacity cards have variable data block sizes, whereas High
dkato 0:b22a1df967cb 59 * Capacity cards fix the size of data block to 512 bytes. I'll therefore
dkato 0:b22a1df967cb 60 * just always use the Standard Capacity cards with a block size of 512 bytes.
dkato 0:b22a1df967cb 61 * This is set with CMD16.
dkato 0:b22a1df967cb 62 *
dkato 0:b22a1df967cb 63 * You can read and write single blocks (CMD17, CMD25) or multiple blocks
dkato 0:b22a1df967cb 64 * (CMD18, CMD25). For simplicity, I'll just use single block accesses. When
dkato 0:b22a1df967cb 65 * the card gets a read command, it responds with a response token, and then
dkato 0:b22a1df967cb 66 * a data token or an error.
dkato 0:b22a1df967cb 67 *
dkato 0:b22a1df967cb 68 * SPI Command Format
dkato 0:b22a1df967cb 69 * ------------------
dkato 0:b22a1df967cb 70 * Commands are 6-bytes long, containing the command, 32-bit argument, and CRC.
dkato 0:b22a1df967cb 71 *
dkato 0:b22a1df967cb 72 * +---------------+------------+------------+-----------+----------+--------------+
dkato 0:b22a1df967cb 73 * | 01 | cmd[5:0] | arg[31:24] | arg[23:16] | arg[15:8] | arg[7:0] | crc[6:0] | 1 |
dkato 0:b22a1df967cb 74 * +---------------+------------+------------+-----------+----------+--------------+
dkato 0:b22a1df967cb 75 *
dkato 0:b22a1df967cb 76 * As I'm not using CRC, I can fix that byte to what is needed for CMD0 (0x95)
dkato 0:b22a1df967cb 77 *
dkato 0:b22a1df967cb 78 * All Application Specific commands shall be preceded with APP_CMD (CMD55).
dkato 0:b22a1df967cb 79 *
dkato 0:b22a1df967cb 80 * SPI Response Format
dkato 0:b22a1df967cb 81 * -------------------
dkato 0:b22a1df967cb 82 * The main response format (R1) is a status byte (normally zero). Key flags:
dkato 0:b22a1df967cb 83 * idle - 1 if the card is in an idle state/initialising
dkato 0:b22a1df967cb 84 * cmd - 1 if an illegal command code was detected
dkato 0:b22a1df967cb 85 *
dkato 0:b22a1df967cb 86 * +-------------------------------------------------+
dkato 0:b22a1df967cb 87 * R1 | 0 | arg | addr | seq | crc | cmd | erase | idle |
dkato 0:b22a1df967cb 88 * +-------------------------------------------------+
dkato 0:b22a1df967cb 89 *
dkato 0:b22a1df967cb 90 * R1b is the same, except it is followed by a busy signal (zeros) until
dkato 0:b22a1df967cb 91 * the first non-zero byte when it is ready again.
dkato 0:b22a1df967cb 92 *
dkato 0:b22a1df967cb 93 * Data Response Token
dkato 0:b22a1df967cb 94 * -------------------
dkato 0:b22a1df967cb 95 * Every data block written to the card is acknowledged by a byte
dkato 0:b22a1df967cb 96 * response token
dkato 0:b22a1df967cb 97 *
dkato 0:b22a1df967cb 98 * +----------------------+
dkato 0:b22a1df967cb 99 * | xxx | 0 | status | 1 |
dkato 0:b22a1df967cb 100 * +----------------------+
dkato 0:b22a1df967cb 101 * 010 - OK!
dkato 0:b22a1df967cb 102 * 101 - CRC Error
dkato 0:b22a1df967cb 103 * 110 - Write Error
dkato 0:b22a1df967cb 104 *
dkato 0:b22a1df967cb 105 * Single Block Read and Write
dkato 0:b22a1df967cb 106 * ---------------------------
dkato 0:b22a1df967cb 107 *
dkato 0:b22a1df967cb 108 * Block transfers have a byte header, followed by the data, followed
dkato 0:b22a1df967cb 109 * by a 16-bit CRC. In our case, the data will always be 512 bytes.
dkato 0:b22a1df967cb 110 *
dkato 0:b22a1df967cb 111 * +------+---------+---------+- - - -+---------+-----------+----------+
dkato 0:b22a1df967cb 112 * | 0xFE | data[0] | data[1] | | data[n] | crc[15:8] | crc[7:0] |
dkato 0:b22a1df967cb 113 * +------+---------+---------+- - - -+---------+-----------+----------+
dkato 0:b22a1df967cb 114 */
dkato 0:b22a1df967cb 115
dkato 0:b22a1df967cb 116 /* If the target has no SPI support then SDCard is not supported */
dkato 0:b22a1df967cb 117 #ifdef DEVICE_SPI
dkato 0:b22a1df967cb 118
dkato 0:b22a1df967cb 119 #include "SDBlockDevice.h"
dkato 0:b22a1df967cb 120 #include "mbed_debug.h"
dkato 0:b22a1df967cb 121
dkato 0:b22a1df967cb 122 #define SD_COMMAND_TIMEOUT 5000
dkato 0:b22a1df967cb 123
dkato 0:b22a1df967cb 124 #define SD_DBG 0
dkato 0:b22a1df967cb 125
dkato 0:b22a1df967cb 126 #define SD_BLOCK_DEVICE_ERROR_WOULD_BLOCK -5001 /*!< operation would block */
dkato 0:b22a1df967cb 127 #define SD_BLOCK_DEVICE_ERROR_UNSUPPORTED -5002 /*!< unsupported operation */
dkato 0:b22a1df967cb 128 #define SD_BLOCK_DEVICE_ERROR_PARAMETER -5003 /*!< invalid parameter */
dkato 0:b22a1df967cb 129 #define SD_BLOCK_DEVICE_ERROR_NO_INIT -5004 /*!< uninitialized */
dkato 0:b22a1df967cb 130 #define SD_BLOCK_DEVICE_ERROR_NO_DEVICE -5005 /*!< device is missing or not connected */
dkato 0:b22a1df967cb 131 #define SD_BLOCK_DEVICE_ERROR_WRITE_PROTECTED -5006 /*!< write protected */
dkato 0:b22a1df967cb 132
dkato 0:b22a1df967cb 133 SDBlockDevice::SDBlockDevice(PinName mosi, PinName miso, PinName sclk, PinName cs)
dkato 0:b22a1df967cb 134 : _spi(mosi, miso, sclk), _cs(cs), _is_initialized(0)
dkato 0:b22a1df967cb 135 {
dkato 0:b22a1df967cb 136 _cs = 1;
dkato 0:b22a1df967cb 137
dkato 0:b22a1df967cb 138 // Set default to 100kHz for initialisation and 1MHz for data transfer
dkato 0:b22a1df967cb 139 _init_sck = 100000;
dkato 0:b22a1df967cb 140 _transfer_sck = 1000000;
dkato 0:b22a1df967cb 141 }
dkato 0:b22a1df967cb 142
dkato 0:b22a1df967cb 143 SDBlockDevice::~SDBlockDevice()
dkato 0:b22a1df967cb 144 {
dkato 0:b22a1df967cb 145 if (_is_initialized) {
dkato 0:b22a1df967cb 146 deinit();
dkato 0:b22a1df967cb 147 }
dkato 0:b22a1df967cb 148 }
dkato 0:b22a1df967cb 149
dkato 0:b22a1df967cb 150 #define R1_IDLE_STATE (1 << 0)
dkato 0:b22a1df967cb 151 #define R1_ERASE_RESET (1 << 1)
dkato 0:b22a1df967cb 152 #define R1_ILLEGAL_COMMAND (1 << 2)
dkato 0:b22a1df967cb 153 #define R1_COM_CRC_ERROR (1 << 3)
dkato 0:b22a1df967cb 154 #define R1_ERASE_SEQUENCE_ERROR (1 << 4)
dkato 0:b22a1df967cb 155 #define R1_ADDRESS_ERROR (1 << 5)
dkato 0:b22a1df967cb 156 #define R1_PARAMETER_ERROR (1 << 6)
dkato 0:b22a1df967cb 157
dkato 0:b22a1df967cb 158 // Types
dkato 0:b22a1df967cb 159 // - v1.x Standard Capacity
dkato 0:b22a1df967cb 160 // - v2.x Standard Capacity
dkato 0:b22a1df967cb 161 // - v2.x High Capacity
dkato 0:b22a1df967cb 162 // - Not recognised as an SD Card
dkato 0:b22a1df967cb 163 #define SDCARD_FAIL 0
dkato 0:b22a1df967cb 164 #define SDCARD_V1 1
dkato 0:b22a1df967cb 165 #define SDCARD_V2 2
dkato 0:b22a1df967cb 166 #define SDCARD_V2HC 3
dkato 0:b22a1df967cb 167
dkato 0:b22a1df967cb 168 int SDBlockDevice::_initialise_card()
dkato 0:b22a1df967cb 169 {
dkato 0:b22a1df967cb 170 _dbg = SD_DBG;
dkato 0:b22a1df967cb 171 // Set to SCK for initialisation, and clock card with cs = 1
dkato 0:b22a1df967cb 172 _spi.lock();
dkato 0:b22a1df967cb 173 _spi.frequency(_init_sck);
dkato 0:b22a1df967cb 174 _cs = 1;
dkato 0:b22a1df967cb 175 for (int i = 0; i < 16; i++) {
dkato 0:b22a1df967cb 176 _spi.write(0xFF);
dkato 0:b22a1df967cb 177 }
dkato 0:b22a1df967cb 178 _spi.unlock();
dkato 0:b22a1df967cb 179
dkato 0:b22a1df967cb 180 // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
dkato 0:b22a1df967cb 181 if (_cmd(0, 0) != R1_IDLE_STATE) {
dkato 0:b22a1df967cb 182 debug_if(_dbg, "No disk, or could not put SD card in to SPI idle state\n");
dkato 0:b22a1df967cb 183 return SD_BLOCK_DEVICE_ERROR_NO_DEVICE;
dkato 0:b22a1df967cb 184 }
dkato 0:b22a1df967cb 185
dkato 0:b22a1df967cb 186 // send CMD8 to determine whther it is ver 2.x
dkato 0:b22a1df967cb 187 int r = _cmd8();
dkato 0:b22a1df967cb 188 if (r == R1_IDLE_STATE) {
dkato 0:b22a1df967cb 189 return _initialise_card_v2();
dkato 0:b22a1df967cb 190 } else if (r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
dkato 0:b22a1df967cb 191 return _initialise_card_v1();
dkato 0:b22a1df967cb 192 } else {
dkato 0:b22a1df967cb 193 debug_if(_dbg, "Not in idle state after sending CMD8 (not an SD card?)\n");
dkato 0:b22a1df967cb 194 return BD_ERROR_DEVICE_ERROR;
dkato 0:b22a1df967cb 195 }
dkato 0:b22a1df967cb 196 }
dkato 0:b22a1df967cb 197
dkato 0:b22a1df967cb 198 int SDBlockDevice::_initialise_card_v1()
dkato 0:b22a1df967cb 199 {
dkato 0:b22a1df967cb 200 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
dkato 0:b22a1df967cb 201 _cmd(55, 0);
dkato 0:b22a1df967cb 202 if (_cmd(41, 0) == 0) {
dkato 0:b22a1df967cb 203 _block_size = 512;
dkato 0:b22a1df967cb 204 debug_if(_dbg, "\n\rInit: SEDCARD_V1\n\r");
dkato 0:b22a1df967cb 205 return BD_ERROR_OK;
dkato 0:b22a1df967cb 206 }
dkato 0:b22a1df967cb 207 }
dkato 0:b22a1df967cb 208
dkato 0:b22a1df967cb 209 debug_if(_dbg, "Timeout waiting for v1.x card\n");
dkato 0:b22a1df967cb 210 return BD_ERROR_DEVICE_ERROR;
dkato 0:b22a1df967cb 211 }
dkato 0:b22a1df967cb 212
dkato 0:b22a1df967cb 213 int SDBlockDevice::_initialise_card_v2()
dkato 0:b22a1df967cb 214 {
dkato 0:b22a1df967cb 215 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
dkato 0:b22a1df967cb 216 wait_ms(50);
dkato 0:b22a1df967cb 217 _cmd58();
dkato 0:b22a1df967cb 218 _cmd(55, 0);
dkato 0:b22a1df967cb 219 if (_cmd(41, 0x40000000) == 0) {
dkato 0:b22a1df967cb 220 _cmd58();
dkato 0:b22a1df967cb 221 debug_if(_dbg, "\n\rInit: SDCARD_V2\n\r");
dkato 0:b22a1df967cb 222 _block_size = 1;
dkato 0:b22a1df967cb 223 return BD_ERROR_OK;
dkato 0:b22a1df967cb 224 }
dkato 0:b22a1df967cb 225 }
dkato 0:b22a1df967cb 226
dkato 0:b22a1df967cb 227 debug_if(_dbg, "Timeout waiting for v2.x card\n");
dkato 0:b22a1df967cb 228 return BD_ERROR_DEVICE_ERROR;
dkato 0:b22a1df967cb 229 }
dkato 0:b22a1df967cb 230
dkato 0:b22a1df967cb 231 int SDBlockDevice::init()
dkato 0:b22a1df967cb 232 {
dkato 0:b22a1df967cb 233 _lock.lock();
dkato 0:b22a1df967cb 234 int err = _initialise_card();
dkato 0:b22a1df967cb 235 _is_initialized = (err == BD_ERROR_OK);
dkato 0:b22a1df967cb 236 if (!_is_initialized) {
dkato 0:b22a1df967cb 237 debug_if(_dbg, "Fail to initialize card\n");
dkato 0:b22a1df967cb 238 _lock.unlock();
dkato 0:b22a1df967cb 239 return err;
dkato 0:b22a1df967cb 240 }
dkato 0:b22a1df967cb 241 debug_if(_dbg, "init card = %d\n", _is_initialized);
dkato 0:b22a1df967cb 242 _sectors = _sd_sectors();
dkato 0:b22a1df967cb 243
dkato 0:b22a1df967cb 244 // Set block length to 512 (CMD16)
dkato 0:b22a1df967cb 245 if (_cmd(16, 512) != 0) {
dkato 0:b22a1df967cb 246 debug_if(_dbg, "Set 512-byte block timed out\n");
dkato 0:b22a1df967cb 247 _lock.unlock();
dkato 0:b22a1df967cb 248 return BD_ERROR_DEVICE_ERROR;
dkato 0:b22a1df967cb 249 }
dkato 0:b22a1df967cb 250
dkato 0:b22a1df967cb 251 // Set SCK for data transfer
dkato 0:b22a1df967cb 252 _spi.frequency(_transfer_sck);
dkato 0:b22a1df967cb 253 _lock.unlock();
dkato 0:b22a1df967cb 254 return BD_ERROR_OK;
dkato 0:b22a1df967cb 255 }
dkato 0:b22a1df967cb 256
dkato 0:b22a1df967cb 257 int SDBlockDevice::deinit()
dkato 0:b22a1df967cb 258 {
dkato 0:b22a1df967cb 259 return 0;
dkato 0:b22a1df967cb 260 }
dkato 0:b22a1df967cb 261
dkato 0:b22a1df967cb 262 int SDBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size)
dkato 0:b22a1df967cb 263 {
dkato 0:b22a1df967cb 264 if (!is_valid_program(addr, size)) {
dkato 0:b22a1df967cb 265 return SD_BLOCK_DEVICE_ERROR_PARAMETER;
dkato 0:b22a1df967cb 266 }
dkato 0:b22a1df967cb 267
dkato 0:b22a1df967cb 268 _lock.lock();
dkato 0:b22a1df967cb 269 if (!_is_initialized) {
dkato 0:b22a1df967cb 270 _lock.unlock();
dkato 0:b22a1df967cb 271 return SD_BLOCK_DEVICE_ERROR_NO_INIT;
dkato 0:b22a1df967cb 272 }
dkato 0:b22a1df967cb 273
dkato 0:b22a1df967cb 274 const uint8_t *buffer = static_cast<const uint8_t*>(b);
dkato 0:b22a1df967cb 275 while (size > 0) {
dkato 0:b22a1df967cb 276 bd_addr_t block = addr / 512;
dkato 0:b22a1df967cb 277 // set write address for single block (CMD24)
dkato 0:b22a1df967cb 278 if (_cmd(24, block * _block_size) != 0) {
dkato 0:b22a1df967cb 279 _lock.unlock();
dkato 0:b22a1df967cb 280 return BD_ERROR_DEVICE_ERROR;
dkato 0:b22a1df967cb 281 }
dkato 0:b22a1df967cb 282
dkato 0:b22a1df967cb 283 // send the data block
dkato 0:b22a1df967cb 284 _write(buffer, 512);
dkato 0:b22a1df967cb 285 buffer += 512;
dkato 0:b22a1df967cb 286 addr += 512;
dkato 0:b22a1df967cb 287 size -= 512;
dkato 0:b22a1df967cb 288 }
dkato 0:b22a1df967cb 289 _lock.unlock();
dkato 0:b22a1df967cb 290 return 0;
dkato 0:b22a1df967cb 291 }
dkato 0:b22a1df967cb 292
dkato 0:b22a1df967cb 293 int SDBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size)
dkato 0:b22a1df967cb 294 {
dkato 0:b22a1df967cb 295 if (!is_valid_read(addr, size)) {
dkato 0:b22a1df967cb 296 return SD_BLOCK_DEVICE_ERROR_PARAMETER;
dkato 0:b22a1df967cb 297 }
dkato 0:b22a1df967cb 298
dkato 0:b22a1df967cb 299 _lock.lock();
dkato 0:b22a1df967cb 300 if (!_is_initialized) {
dkato 0:b22a1df967cb 301 _lock.unlock();
dkato 0:b22a1df967cb 302 return SD_BLOCK_DEVICE_ERROR_PARAMETER;
dkato 0:b22a1df967cb 303 }
dkato 0:b22a1df967cb 304
dkato 0:b22a1df967cb 305 uint8_t *buffer = static_cast<uint8_t *>(b);
dkato 0:b22a1df967cb 306 while (size > 0) {
dkato 0:b22a1df967cb 307 bd_addr_t block = addr / 512;
dkato 0:b22a1df967cb 308 // set read address for single block (CMD17)
dkato 0:b22a1df967cb 309 if (_cmd(17, block * _block_size) != 0) {
dkato 0:b22a1df967cb 310 _lock.unlock();
dkato 0:b22a1df967cb 311 return BD_ERROR_DEVICE_ERROR;
dkato 0:b22a1df967cb 312 }
dkato 0:b22a1df967cb 313
dkato 0:b22a1df967cb 314 // receive the data
dkato 0:b22a1df967cb 315 _read(buffer, 512);
dkato 0:b22a1df967cb 316 buffer += 512;
dkato 0:b22a1df967cb 317 addr += 512;
dkato 0:b22a1df967cb 318 size -= 512;
dkato 0:b22a1df967cb 319 }
dkato 0:b22a1df967cb 320 _lock.unlock();
dkato 0:b22a1df967cb 321 return 0;
dkato 0:b22a1df967cb 322 }
dkato 0:b22a1df967cb 323
dkato 0:b22a1df967cb 324 int SDBlockDevice::erase(bd_addr_t addr, bd_size_t size)
dkato 0:b22a1df967cb 325 {
dkato 0:b22a1df967cb 326 return 0;
dkato 0:b22a1df967cb 327 }
dkato 0:b22a1df967cb 328
dkato 0:b22a1df967cb 329 bd_size_t SDBlockDevice::get_read_size() const
dkato 0:b22a1df967cb 330 {
dkato 0:b22a1df967cb 331 return 512;
dkato 0:b22a1df967cb 332 }
dkato 0:b22a1df967cb 333
dkato 0:b22a1df967cb 334 bd_size_t SDBlockDevice::get_program_size() const
dkato 0:b22a1df967cb 335 {
dkato 0:b22a1df967cb 336 return 512;
dkato 0:b22a1df967cb 337 }
dkato 0:b22a1df967cb 338
dkato 0:b22a1df967cb 339 bd_size_t SDBlockDevice::get_erase_size() const
dkato 0:b22a1df967cb 340 {
dkato 0:b22a1df967cb 341 return 512;
dkato 0:b22a1df967cb 342 }
dkato 0:b22a1df967cb 343
dkato 0:b22a1df967cb 344 bd_size_t SDBlockDevice::size() const
dkato 0:b22a1df967cb 345 {
dkato 0:b22a1df967cb 346 bd_size_t sectors = 0;
dkato 0:b22a1df967cb 347 if(_is_initialized) {
dkato 0:b22a1df967cb 348 sectors = _sectors;
dkato 0:b22a1df967cb 349 }
dkato 0:b22a1df967cb 350 return 512*sectors;
dkato 0:b22a1df967cb 351 }
dkato 0:b22a1df967cb 352
dkato 0:b22a1df967cb 353 void SDBlockDevice::debug(bool dbg)
dkato 0:b22a1df967cb 354 {
dkato 0:b22a1df967cb 355 _dbg = dbg;
dkato 0:b22a1df967cb 356 }
dkato 0:b22a1df967cb 357
dkato 0:b22a1df967cb 358
dkato 0:b22a1df967cb 359 // PRIVATE FUNCTIONS
dkato 0:b22a1df967cb 360 int SDBlockDevice::_cmd(int cmd, int arg) {
dkato 0:b22a1df967cb 361 _spi.lock();
dkato 0:b22a1df967cb 362 _cs = 0;
dkato 0:b22a1df967cb 363
dkato 0:b22a1df967cb 364 // send a command
dkato 0:b22a1df967cb 365 _spi.write(0x40 | cmd);
dkato 0:b22a1df967cb 366 _spi.write(arg >> 24);
dkato 0:b22a1df967cb 367 _spi.write(arg >> 16);
dkato 0:b22a1df967cb 368 _spi.write(arg >> 8);
dkato 0:b22a1df967cb 369 _spi.write(arg >> 0);
dkato 0:b22a1df967cb 370 _spi.write(0x95);
dkato 0:b22a1df967cb 371
dkato 0:b22a1df967cb 372 // wait for the repsonse (response[7] == 0)
dkato 0:b22a1df967cb 373 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
dkato 0:b22a1df967cb 374 int response = _spi.write(0xFF);
dkato 0:b22a1df967cb 375 if (!(response & 0x80)) {
dkato 0:b22a1df967cb 376 _cs = 1;
dkato 0:b22a1df967cb 377 _spi.write(0xFF);
dkato 0:b22a1df967cb 378 _spi.unlock();
dkato 0:b22a1df967cb 379 return response;
dkato 0:b22a1df967cb 380 }
dkato 0:b22a1df967cb 381 }
dkato 0:b22a1df967cb 382 _cs = 1;
dkato 0:b22a1df967cb 383 _spi.write(0xFF);
dkato 0:b22a1df967cb 384 _spi.unlock();
dkato 0:b22a1df967cb 385 return -1; // timeout
dkato 0:b22a1df967cb 386 }
dkato 0:b22a1df967cb 387 int SDBlockDevice::_cmdx(int cmd, int arg) {
dkato 0:b22a1df967cb 388 _spi.lock();
dkato 0:b22a1df967cb 389 _cs = 0;
dkato 0:b22a1df967cb 390
dkato 0:b22a1df967cb 391 // send a command
dkato 0:b22a1df967cb 392 _spi.write(0x40 | cmd);
dkato 0:b22a1df967cb 393 _spi.write(arg >> 24);
dkato 0:b22a1df967cb 394 _spi.write(arg >> 16);
dkato 0:b22a1df967cb 395 _spi.write(arg >> 8);
dkato 0:b22a1df967cb 396 _spi.write(arg >> 0);
dkato 0:b22a1df967cb 397 _spi.write(0x95);
dkato 0:b22a1df967cb 398
dkato 0:b22a1df967cb 399 // wait for the repsonse (response[7] == 0)
dkato 0:b22a1df967cb 400 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
dkato 0:b22a1df967cb 401 int response = _spi.write(0xFF);
dkato 0:b22a1df967cb 402 if (!(response & 0x80)) {
dkato 0:b22a1df967cb 403 _cs = 1;
dkato 0:b22a1df967cb 404 _spi.unlock();
dkato 0:b22a1df967cb 405 return response;
dkato 0:b22a1df967cb 406 }
dkato 0:b22a1df967cb 407 }
dkato 0:b22a1df967cb 408 _cs = 1;
dkato 0:b22a1df967cb 409 _spi.write(0xFF);
dkato 0:b22a1df967cb 410 _spi.unlock();
dkato 0:b22a1df967cb 411 return -1; // timeout
dkato 0:b22a1df967cb 412 }
dkato 0:b22a1df967cb 413
dkato 0:b22a1df967cb 414
dkato 0:b22a1df967cb 415 int SDBlockDevice::_cmd58() {
dkato 0:b22a1df967cb 416 _spi.lock();
dkato 0:b22a1df967cb 417 _cs = 0;
dkato 0:b22a1df967cb 418 int arg = 0;
dkato 0:b22a1df967cb 419
dkato 0:b22a1df967cb 420 // send a command
dkato 0:b22a1df967cb 421 _spi.write(0x40 | 58);
dkato 0:b22a1df967cb 422 _spi.write(arg >> 24);
dkato 0:b22a1df967cb 423 _spi.write(arg >> 16);
dkato 0:b22a1df967cb 424 _spi.write(arg >> 8);
dkato 0:b22a1df967cb 425 _spi.write(arg >> 0);
dkato 0:b22a1df967cb 426 _spi.write(0x95);
dkato 0:b22a1df967cb 427
dkato 0:b22a1df967cb 428 // wait for the repsonse (response[7] == 0)
dkato 0:b22a1df967cb 429 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
dkato 0:b22a1df967cb 430 int response = _spi.write(0xFF);
dkato 0:b22a1df967cb 431 if (!(response & 0x80)) {
dkato 0:b22a1df967cb 432 int ocr = _spi.write(0xFF) << 24;
dkato 0:b22a1df967cb 433 ocr |= _spi.write(0xFF) << 16;
dkato 0:b22a1df967cb 434 ocr |= _spi.write(0xFF) << 8;
dkato 0:b22a1df967cb 435 ocr |= _spi.write(0xFF) << 0;
dkato 0:b22a1df967cb 436 _cs = 1;
dkato 0:b22a1df967cb 437 _spi.write(0xFF);
dkato 0:b22a1df967cb 438 _spi.unlock();
dkato 0:b22a1df967cb 439 return response;
dkato 0:b22a1df967cb 440 }
dkato 0:b22a1df967cb 441 }
dkato 0:b22a1df967cb 442 _cs = 1;
dkato 0:b22a1df967cb 443 _spi.write(0xFF);
dkato 0:b22a1df967cb 444 _spi.unlock();
dkato 0:b22a1df967cb 445 return -1; // timeout
dkato 0:b22a1df967cb 446 }
dkato 0:b22a1df967cb 447
dkato 0:b22a1df967cb 448 int SDBlockDevice::_cmd8() {
dkato 0:b22a1df967cb 449 _spi.lock();
dkato 0:b22a1df967cb 450 _cs = 0;
dkato 0:b22a1df967cb 451
dkato 0:b22a1df967cb 452 // send a command
dkato 0:b22a1df967cb 453 _spi.write(0x40 | 8); // CMD8
dkato 0:b22a1df967cb 454 _spi.write(0x00); // reserved
dkato 0:b22a1df967cb 455 _spi.write(0x00); // reserved
dkato 0:b22a1df967cb 456 _spi.write(0x01); // 3.3v
dkato 0:b22a1df967cb 457 _spi.write(0xAA); // check pattern
dkato 0:b22a1df967cb 458 _spi.write(0x87); // crc
dkato 0:b22a1df967cb 459
dkato 0:b22a1df967cb 460 // wait for the repsonse (response[7] == 0)
dkato 0:b22a1df967cb 461 for (int i = 0; i < SD_COMMAND_TIMEOUT * 1000; i++) {
dkato 0:b22a1df967cb 462 char response[5];
dkato 0:b22a1df967cb 463 response[0] = _spi.write(0xFF);
dkato 0:b22a1df967cb 464 if (!(response[0] & 0x80)) {
dkato 0:b22a1df967cb 465 for (int j = 1; j < 5; j++) {
dkato 0:b22a1df967cb 466 response[i] = _spi.write(0xFF);
dkato 0:b22a1df967cb 467 }
dkato 0:b22a1df967cb 468 _cs = 1;
dkato 0:b22a1df967cb 469 _spi.write(0xFF);
dkato 0:b22a1df967cb 470 _spi.unlock();
dkato 0:b22a1df967cb 471 return response[0];
dkato 0:b22a1df967cb 472 }
dkato 0:b22a1df967cb 473 }
dkato 0:b22a1df967cb 474 _cs = 1;
dkato 0:b22a1df967cb 475 _spi.write(0xFF);
dkato 0:b22a1df967cb 476 _spi.unlock();
dkato 0:b22a1df967cb 477 return -1; // timeout
dkato 0:b22a1df967cb 478 }
dkato 0:b22a1df967cb 479
dkato 0:b22a1df967cb 480 int SDBlockDevice::_read(uint8_t *buffer, uint32_t length) {
dkato 0:b22a1df967cb 481 _spi.lock();
dkato 0:b22a1df967cb 482 _cs = 0;
dkato 0:b22a1df967cb 483
dkato 0:b22a1df967cb 484 // read until start byte (0xFF)
dkato 0:b22a1df967cb 485 while (_spi.write(0xFF) != 0xFE);
dkato 0:b22a1df967cb 486
dkato 0:b22a1df967cb 487 // read data
dkato 0:b22a1df967cb 488 for (uint32_t i = 0; i < length; i++) {
dkato 0:b22a1df967cb 489 buffer[i] = _spi.write(0xFF);
dkato 0:b22a1df967cb 490 }
dkato 0:b22a1df967cb 491 _spi.write(0xFF); // checksum
dkato 0:b22a1df967cb 492 _spi.write(0xFF);
dkato 0:b22a1df967cb 493
dkato 0:b22a1df967cb 494 _cs = 1;
dkato 0:b22a1df967cb 495 _spi.write(0xFF);
dkato 0:b22a1df967cb 496 _spi.unlock();
dkato 0:b22a1df967cb 497 return 0;
dkato 0:b22a1df967cb 498 }
dkato 0:b22a1df967cb 499
dkato 0:b22a1df967cb 500 int SDBlockDevice::_write(const uint8_t*buffer, uint32_t length) {
dkato 0:b22a1df967cb 501 _spi.lock();
dkato 0:b22a1df967cb 502 _cs = 0;
dkato 0:b22a1df967cb 503
dkato 0:b22a1df967cb 504 // indicate start of block
dkato 0:b22a1df967cb 505 _spi.write(0xFE);
dkato 0:b22a1df967cb 506
dkato 0:b22a1df967cb 507 // write the data
dkato 0:b22a1df967cb 508 for (uint32_t i = 0; i < length; i++) {
dkato 0:b22a1df967cb 509 _spi.write(buffer[i]);
dkato 0:b22a1df967cb 510 }
dkato 0:b22a1df967cb 511
dkato 0:b22a1df967cb 512 // write the checksum
dkato 0:b22a1df967cb 513 _spi.write(0xFF);
dkato 0:b22a1df967cb 514 _spi.write(0xFF);
dkato 0:b22a1df967cb 515
dkato 0:b22a1df967cb 516 // check the response token
dkato 0:b22a1df967cb 517 if ((_spi.write(0xFF) & 0x1F) != 0x05) {
dkato 0:b22a1df967cb 518 _cs = 1;
dkato 0:b22a1df967cb 519 _spi.write(0xFF);
dkato 0:b22a1df967cb 520 _spi.unlock();
dkato 0:b22a1df967cb 521 return 1;
dkato 0:b22a1df967cb 522 }
dkato 0:b22a1df967cb 523
dkato 0:b22a1df967cb 524 // wait for write to finish
dkato 0:b22a1df967cb 525 while (_spi.write(0xFF) == 0);
dkato 0:b22a1df967cb 526
dkato 0:b22a1df967cb 527 _cs = 1;
dkato 0:b22a1df967cb 528 _spi.write(0xFF);
dkato 0:b22a1df967cb 529 _spi.unlock();
dkato 0:b22a1df967cb 530 return 0;
dkato 0:b22a1df967cb 531 }
dkato 0:b22a1df967cb 532
dkato 0:b22a1df967cb 533 static uint32_t ext_bits(unsigned char *data, int msb, int lsb) {
dkato 0:b22a1df967cb 534 uint32_t bits = 0;
dkato 0:b22a1df967cb 535 uint32_t size = 1 + msb - lsb;
dkato 0:b22a1df967cb 536 for (uint32_t i = 0; i < size; i++) {
dkato 0:b22a1df967cb 537 uint32_t position = lsb + i;
dkato 0:b22a1df967cb 538 uint32_t byte = 15 - (position >> 3);
dkato 0:b22a1df967cb 539 uint32_t bit = position & 0x7;
dkato 0:b22a1df967cb 540 uint32_t value = (data[byte] >> bit) & 1;
dkato 0:b22a1df967cb 541 bits |= value << i;
dkato 0:b22a1df967cb 542 }
dkato 0:b22a1df967cb 543 return bits;
dkato 0:b22a1df967cb 544 }
dkato 0:b22a1df967cb 545
dkato 0:b22a1df967cb 546 uint32_t SDBlockDevice::_sd_sectors() {
dkato 0:b22a1df967cb 547 uint32_t c_size, c_size_mult, read_bl_len;
dkato 0:b22a1df967cb 548 uint32_t block_len, mult, blocknr, capacity;
dkato 0:b22a1df967cb 549 uint32_t hc_c_size;
dkato 0:b22a1df967cb 550 uint32_t blocks;
dkato 0:b22a1df967cb 551
dkato 0:b22a1df967cb 552 // CMD9, Response R2 (R1 byte + 16-byte block read)
dkato 0:b22a1df967cb 553 if (_cmdx(9, 0) != 0) {
dkato 0:b22a1df967cb 554 debug_if(_dbg, "Didn't get a response from the disk\n");
dkato 0:b22a1df967cb 555 return 0;
dkato 0:b22a1df967cb 556 }
dkato 0:b22a1df967cb 557
dkato 0:b22a1df967cb 558 uint8_t csd[16];
dkato 0:b22a1df967cb 559 if (_read(csd, 16) != 0) {
dkato 0:b22a1df967cb 560 debug_if(_dbg, "Couldn't read csd response from disk\n");
dkato 0:b22a1df967cb 561 return 0;
dkato 0:b22a1df967cb 562 }
dkato 0:b22a1df967cb 563
dkato 0:b22a1df967cb 564 // csd_structure : csd[127:126]
dkato 0:b22a1df967cb 565 // c_size : csd[73:62]
dkato 0:b22a1df967cb 566 // c_size_mult : csd[49:47]
dkato 0:b22a1df967cb 567 // read_bl_len : csd[83:80] - the *maximum* read block length
dkato 0:b22a1df967cb 568
dkato 0:b22a1df967cb 569 int csd_structure = ext_bits(csd, 127, 126);
dkato 0:b22a1df967cb 570
dkato 0:b22a1df967cb 571 switch (csd_structure) {
dkato 0:b22a1df967cb 572 case 0:
dkato 0:b22a1df967cb 573 _block_size = 512;
dkato 0:b22a1df967cb 574 c_size = ext_bits(csd, 73, 62);
dkato 0:b22a1df967cb 575 c_size_mult = ext_bits(csd, 49, 47);
dkato 0:b22a1df967cb 576 read_bl_len = ext_bits(csd, 83, 80);
dkato 0:b22a1df967cb 577
dkato 0:b22a1df967cb 578 block_len = 1 << read_bl_len;
dkato 0:b22a1df967cb 579 mult = 1 << (c_size_mult + 2);
dkato 0:b22a1df967cb 580 blocknr = (c_size + 1) * mult;
dkato 0:b22a1df967cb 581 capacity = blocknr * block_len;
dkato 0:b22a1df967cb 582 blocks = capacity / 512;
dkato 0:b22a1df967cb 583 debug_if(_dbg, "\n\rSDBlockDevice\n\rc_size: %d \n\rcapacity: %ld \n\rsectors: %lld\n\r", c_size, capacity, blocks);
dkato 0:b22a1df967cb 584 break;
dkato 0:b22a1df967cb 585
dkato 0:b22a1df967cb 586 case 1:
dkato 0:b22a1df967cb 587 _block_size = 1;
dkato 0:b22a1df967cb 588 hc_c_size = ext_bits(csd, 63, 48);
dkato 0:b22a1df967cb 589 blocks = (hc_c_size+1)*1024;
dkato 0:b22a1df967cb 590 debug_if(_dbg, "\n\rSDHC Card \n\rhc_c_size: %d\n\rcapacity: %lld \n\rsectors: %lld\n\r", hc_c_size, blocks*512, blocks);
dkato 0:b22a1df967cb 591 break;
dkato 0:b22a1df967cb 592
dkato 0:b22a1df967cb 593 default:
dkato 0:b22a1df967cb 594 debug_if(_dbg, "CSD struct unsupported\r\n");
dkato 0:b22a1df967cb 595 return 0;
dkato 0:b22a1df967cb 596 };
dkato 0:b22a1df967cb 597 return blocks;
dkato 0:b22a1df967cb 598 }
dkato 0:b22a1df967cb 599
dkato 0:b22a1df967cb 600 #endif /* DEVICE_SPI */