nvt-se
parent
e9d279620f
commit
28619eabc0
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@ -35,7 +35,7 @@ if advised of the possibility of such damage.
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This implementation was developed by the CST group at the FUB.
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For documentation and questions please use the web site
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http://scatterweb.mi.fu-berlin.de and the mailinglist
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http://scatterweb.mi.fu-berlin.de and the mailinglist
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scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
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Berlin, 2007
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*/
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@ -47,9 +47,9 @@ Berlin, 2007
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* @brief MMC-/SD-Card library
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*
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* @author Michael Baar <baar@inf.fu-berlin.de>
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* @version $Revision: 1.8 $
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* @version $Revision: 1.9 $
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*
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* $Id: sd.c,v 1.8 2009/05/26 12:15:46 nvt-se Exp $
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* $Id: sd.c,v 1.9 2009/05/26 13:00:07 nvt-se Exp $
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*
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* Initialisation and basic functions for read and write access
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*/
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@ -71,10 +71,10 @@ volatile sd_state_t sd_state;
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void
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sd_init(void)
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{
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// depending on the system global variables may not get initialised on startup
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/* depending on the system global variables may not get initialised on startup */
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memset((void *)&sd_state, 0, sizeof (sd_state));
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// initialize io ports
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/* initialize io ports */
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sd_init_platform();
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}
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@ -96,24 +96,24 @@ sd_init_card(sd_cache_t * pCache)
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return SD_INIT_SUCCESS;
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}
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// Wait for UART and switch to SPI mode
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/* Wait for UART and switch to SPI mode */
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if(!uart_lock_wait(UART_MODE_SPI)) {
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return SD_INIT_FAILED;
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}
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// reset card
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/* reset card */
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resetcnt = _sd_reset(&r3);
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if(resetcnt >= SD_RESET_RETRY_COUNT) {
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ret = SD_INIT_FAILED;
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goto sd_init_card_fail;
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}
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// Test for hardware compatibility
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/* Test for hardware compatibility */
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if((r3.ocr & SD_V_MASK) != SD_V_MASK) {
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ret = SD_INIT_NOTSUPP;
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goto sd_init_card_fail;
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}
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// Test for software compatibility
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/* Test for software compatibility */
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if(!_sd_read_register(&csd, SD_CMD_SEND_CSD, sizeof (struct sd_csd))) {
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ret = SD_INIT_FAILED;
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goto sd_init_card_fail;
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@ -138,7 +138,7 @@ sd_init_card_fail:
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if(ret != SD_INIT_SUCCESS) {
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return ret;
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}
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// state
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/* state */
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sd_state.MinBlockLen_bit = 9;
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sd_state.MaxBlockLen_bit = SD_CSD_READ_BL_LEN(csd);
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sd_state.Flags = SD_INITIALIZED;
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@ -186,7 +186,7 @@ sd_close(void)
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{
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sd_flush();
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// reset state
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/* reset state */
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memset((void *)&sd_state, 0, sizeof (sd_state));
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}
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@ -197,12 +197,12 @@ sd_set_blocklength(const uint8_t blocklength_bit)
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uint8_t ret;
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uint8_t arg[4];
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// test if already set
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/* test if already set */
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if(blocklength_bit == sd_state.BlockLen_bit) {
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return sd_state.BlockLen_bit;
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}
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// Wait for UART and switch to SPI mode
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/* Wait for UART and switch to SPI mode */
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if(!uart_lock_wait(UART_MODE_SPI)) {
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return sd_state.BlockLen_bit;
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}
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@ -210,7 +210,7 @@ sd_set_blocklength(const uint8_t blocklength_bit)
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((uint16_t *)arg)[1] = 0;
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((uint16_t *)arg)[0] = 1 << blocklength_bit;
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// set blocklength command
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/* set blocklength command */
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if(_sd_send_cmd(SD_CMD_SET_BLOCKLENGTH, SD_RESPONSE_SIZE_R1, arg, NULL)) {
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sd_state.BlockLen_bit = blocklength_bit;
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sd_state.BlockLen = ((uint16_t *)arg)[0];
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@ -219,17 +219,17 @@ sd_set_blocklength(const uint8_t blocklength_bit)
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ret = SD_BLOCKLENGTH_INVALID;
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}
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// unlock uart
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/* unlock uart */
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uart_unlock(UART_MODE_SPI);
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return ret;
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}
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//@}
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/*@} */
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///////////////////////////////////////////////////////////////////////////////
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// Public functions, Reading
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///////////////////////////////////////////////////////////////////////////////
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/*///////////////////////////////////////////////////////////////////////////// */
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/* Public functions, Reading */
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/*///////////////////////////////////////////////////////////////////////////// */
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uint16_t
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sd_align_address(uint32_t * pAddress)
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{
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@ -257,7 +257,7 @@ sd_read_block(void (*const pBuffer), const uint32_t address)
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sdspi_read(pBuffer, sd_state.BlockLen, TRUE);
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// receive CRC16 and finish
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/* receive CRC16 and finish */
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_sd_read_stop(2);
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splx(s);
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@ -274,19 +274,19 @@ sd_read_byte(void *pBuffer, const uint32_t address)
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return sd_read_block(pBuffer, address);
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} else {
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uint32_t blAdr = address;
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uint16_t offset; // bytes from aligned address to start of first byte to keep
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// align
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uint16_t offset; /* bytes from aligned address to start of first byte to keep */
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/* align */
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offset = sd_align_address(&blAdr);
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// start
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/* start */
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if(!_sd_read_start(SD_CMD_READ_SINGLE_BLOCK, address)) {
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return FALSE;
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}
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// read
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/* read */
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sdspi_read(pBuffer, offset + 1, FALSE);
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// done
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/* done */
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_sd_read_stop(sd_state.BlockLen - offset - 1);
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}
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@ -298,84 +298,84 @@ sd_read_byte(void *pBuffer, const uint32_t address)
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unsigned int
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sd_read(void *pBuffer, unsigned long address, unsigned int size)
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{
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unsigned char *p; // pointer to current pos in receive buffer
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unsigned int offset; // bytes from aligned address to start of first byte to keep
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unsigned int read_count; // num bytes to read in one iteration
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bool dump_flag; // number of bytes to dump in last iteration
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unsigned int num_bytes_read; // number of bytes read into receive buffer
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unsigned char *p; /* pointer to current pos in receive buffer */
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unsigned int offset; /* bytes from aligned address to start of first byte to keep */
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unsigned int read_count; /* num bytes to read in one iteration */
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bool dump_flag; /* number of bytes to dump in last iteration */
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unsigned int num_bytes_read; /* number of bytes read into receive buffer */
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unsigned char ret;
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//
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// parameter processing
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//
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/* */
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/* parameter processing */
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/* */
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if(size == 0) {
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return 0;
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}
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// align to block
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/* align to block */
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offset = sd_align_address(&address);
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if((offset == 0) && (sd_state.BlockLen == size)) {
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// best case: perfectly block aligned, no chunking
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// -> do shortcut
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/* best case: perfectly block aligned, no chunking */
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/* -> do shortcut */
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return sd_read_block(pBuffer, address);
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}
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// calculate first block
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/* calculate first block */
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if(size > sd_state.BlockLen) {
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read_count = sd_state.BlockLen;
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} else {
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read_count = size;
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}
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//
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// Data transfer
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//
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/* */
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/* Data transfer */
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/* */
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s = splhigh(s);
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// request data transfer
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/* request data transfer */
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ret = _sd_read_start(SD_CMD_READ_SINGLE_BLOCK, address);
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if(!ret) {
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splx(s);
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return 0;
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}
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// run to offset
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/* run to offset */
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if(offset) {
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sdspi_read(pBuffer, offset, FALSE); // dump till offset
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sdspi_read(pBuffer, offset, FALSE); /* dump till offset */
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dump_flag = ((read_count + offset) < sd_state.BlockLen);
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if(!dump_flag) {
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read_count = sd_state.BlockLen - offset; // max bytes to read from first block
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read_count = sd_state.BlockLen - offset; /* max bytes to read from first block */
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}
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} else {
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dump_flag = (read_count < sd_state.BlockLen);
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}
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//
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// block read loop
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//
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/* */
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/* block read loop */
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/* */
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num_bytes_read = 0;
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p = pBuffer;
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do {
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// whole block will be processed
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size -= read_count; // global counter
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/* whole block will be processed */
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size -= read_count; /* global counter */
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// read to receive buffer
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/* read to receive buffer */
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sdspi_read(p, read_count, TRUE);
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p += read_count; // increment buffer pointer
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p += read_count; /* increment buffer pointer */
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num_bytes_read += read_count;
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// finish block
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/* finish block */
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if(dump_flag) {
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// cancel remaining bytes (last iteration)
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/* cancel remaining bytes (last iteration) */
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_sd_read_stop(sd_state.BlockLen - read_count - offset);
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break;
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// unselect is included in send_cmd
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/* unselect is included in send_cmd */
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} else {
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sdspi_idle(2); // receive CRC16
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sdspi_idle(2); /* receive CRC16 */
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if(size != 0) {
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// address calculation for next block
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/* address calculation for next block */
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offset = 0;
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address += sd_state.BlockLen;
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if(size > sd_state.BlockLen) {
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@ -393,7 +393,7 @@ sd_read(void *pBuffer, unsigned long address, unsigned int size)
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return 0;
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}
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} else {
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// finished
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/* finished */
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_sd_read_stop(0);
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break;
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}
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@ -405,11 +405,11 @@ sd_read(void *pBuffer, unsigned long address, unsigned int size)
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return num_bytes_read;
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}
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#endif // SD_READ_ANY
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#endif /* SD_READ_ANY */
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///////////////////////////////////////////////////////////////////////////////
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// Public functions, Writing
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///////////////////////////////////////////////////////////////////////////////
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/*///////////////////////////////////////////////////////////////////////////// */
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/* Public functions, Writing */
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/*///////////////////////////////////////////////////////////////////////////// */
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#if SD_WRITE
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enum sd_write_ret
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_sd_write_finish(void)
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@ -427,10 +427,10 @@ _sd_write_finish(void)
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s = splhigh();
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// dummy crc
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/* dummy crc */
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sdspi_idle(2);
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// receive data response (ZZS___ 3 bits crc response)
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/* receive data response (ZZS___ 3 bits crc response) */
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for(i = 0; i < SD_TIMEOUT_NCR; i++) {
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ret = sdspi_rx();
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if((ret > 0) && (ret < 0xFF)) {
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@ -442,23 +442,23 @@ _sd_write_finish(void)
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}
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}
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// wait for data to be written
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/* wait for data to be written */
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_sd_wait_standby(NULL);
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splx(s);
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sdspi_unselect();
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if(ret) {
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// data transfer to sd card buffer was successful
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// query for result of actual write operation
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/* data transfer to sd card buffer was successful */
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/* query for result of actual write operation */
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ret = _sd_send_cmd(SD_CMD_SEND_STATUS, SD_RESPONSE_SIZE_R2, NULL, &r2);
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if(ret && (r2 == 0)) {
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result = SD_WRITE_SUCCESS;
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}
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} else {
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// data transfer to sd card buffer failed
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/* data transfer to sd card buffer failed */
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}
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// unlock uart (locked from every write operation)
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/* unlock uart (locked from every write operation) */
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uart_unlock(UART_MODE_SPI);
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return result;
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@ -486,17 +486,18 @@ _sd_write_block(const uint32_t * pAddress, const void *pBuffer, int increment)
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uint8_t r1, ret;
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int s;
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// block write-access on write protection
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/* block write-access on write protection */
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if(sd_protected()) {
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return SD_WRITE_PROTECTED_ERR;
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}
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// acquire uart
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/* acquire uart */
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if(!uart_lock_wait(UART_MODE_SPI)) {
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return SD_WRITE_INTERFACE_ERR;
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}
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// start write
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/* start write */
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s = splhigh();
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SD_LED_WRITE_ON;
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r1 = 0;
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ret = _sd_send_cmd(SD_CMD_WRITE_SINGLE_BLOCK, SD_RESPONSE_SIZE_R1,
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@ -504,12 +505,13 @@ _sd_write_block(const uint32_t * pAddress, const void *pBuffer, int increment)
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if(!ret || r1) {
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leds_on(LEDS_ALL);
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_sd_reset(NULL);
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splx(s);
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uart_unlock(UART_MODE_SPI);
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SD_LED_WRITE_OFF;
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return SD_WRITE_COMMAND_ERR;
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}
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// write data
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s = splhigh();
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/* write data */
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sdspi_select();
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sdspi_tx(0xFF);
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sdspi_tx(SD_TOKEN_WRITE);
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@ -517,7 +519,7 @@ _sd_write_block(const uint32_t * pAddress, const void *pBuffer, int increment)
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SD_LED_WRITE_OFF;
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// finish write
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/* finish write */
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#if SPI_DMA_WRITE
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sdspi_dma_lock = TRUE;
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splx(s);
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@ -535,19 +537,17 @@ sd_set_block(const uint32_t address, const char (*const pChar))
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return _sd_write_block(&address, pChar, FALSE);
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}
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enum sd_write_ret
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sd_write_block(const uint32_t address, void const (*const pBuffer))
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{
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return _sd_write_block(&address, pBuffer, TRUE);
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}
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// Supporting functions
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///////////////////////////////////////////////////////////////////////////////
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/*///////////////////////////////////////////////////////////////////////////// */
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/* Supporting functions */
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/*///////////////////////////////////////////////////////////////////////////// */
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/**
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@ -559,7 +559,7 @@ inline bool _sd_get_op_cond(struct sd_response_r1 * pResponse)
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{
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bool ret;
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// SD style
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/* SD style */
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ret = _sd_send_cmd(SD_CMD_APP_SECIFIC_CMD, SD_RESPONSE_SIZE_R1, NULL,
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pResponse);
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@ -568,7 +568,7 @@ inline bool _sd_get_op_cond(struct sd_response_r1 * pResponse)
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ret = _sd_send_cmd(SD_ACMD_SEND_OP_COND, SD_RESPONSE_SIZE_R1, &arg,
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pResponse);
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} else {
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// MMC style init
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/* MMC style init */
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ret = _sd_send_cmd(SD_CMD_SEND_OP_COND, SD_RESPONSE_SIZE_R1, NULL,
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pResponse);
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if(*((uint8_t *)pResponse) & SD_R1_ERROR_MASK) {
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@ -653,11 +653,12 @@ _sd_send_cmd(const uint8_t command,
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int i; /* loop counter */
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int s; /* interrupt state */
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sdspi_select();
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#if SD_WRITE && SPI_DMA_WRITE
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sd_write_flush();
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#endif
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sdspi_select();
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cmd[0] |= command;
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if(pArg != NULL) {
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cmd[1] = ((uint8_t *)pArg)[3];
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@ -669,7 +670,7 @@ _sd_send_cmd(const uint8_t command,
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s = splhigh();
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sdspi_write(cmd, 6, 1);
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// wait for start bit
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/* wait for start bit */
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i = SD_TIMEOUT_NCR;
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do {
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data = sdspi_rx();
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@ -684,10 +685,10 @@ _sd_send_cmd(const uint8_t command,
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_sd_send_cmd_response:
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s = splhigh();
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// start bit received, read response with size i
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/* start bit received, read response with size i */
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i = response_size - 1;
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if(pResponse != NULL) {
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// copy response to response buffer
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/* copy response to response buffer */
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do {
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((uint8_t *)pResponse)[i] = data;
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if(i == 0) {
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|
@ -698,11 +699,11 @@ _sd_send_cmd_response:
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i--;
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} while(1);
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} else {
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// receive and ignore response
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/* receive and ignore response */
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sdspi_read(&data, i, 0);
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}
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// done successfully
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/* done successfully */
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sdspi_unselect();
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splx(s);
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@ -710,7 +711,7 @@ _sd_send_cmd_response:
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return TRUE;
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sd_send_cmd_fail:
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// failed
|
||||
/* failed */
|
||||
sdspi_unselect();
|
||||
return FALSE;
|
||||
|
||||
|
|
@ -744,7 +745,7 @@ _sd_read_start(uint8_t cmd, uint32_t address)
|
|||
uint8_t ret;
|
||||
uint16_t i;
|
||||
|
||||
// aquire uart
|
||||
/* acquire uart */
|
||||
if(!uart_lock_wait(UART_MODE_SPI)) {
|
||||
return FALSE;
|
||||
}
|
||||
|
|
@ -754,26 +755,15 @@ _sd_read_start(uint8_t cmd, uint32_t address)
|
|||
goto _sd_read_start_fail;
|
||||
}
|
||||
|
||||
// Wait for start bit (0)
|
||||
/* Wait for start bit (0) */
|
||||
sdspi_select();
|
||||
|
||||
i = sdspi_wait_token(0xFF, 0xFF, SD_TOKEN_READ, SD_TIMEOUT_READ);
|
||||
|
||||
if(i < SD_TIMEOUT_READ) {
|
||||
// token received, data bytes follow
|
||||
/* token received, data bytes follow */
|
||||
SD_LED_READ_ON;
|
||||
|
||||
/*
|
||||
Following code handles error tokens. Since these are currently not used in the
|
||||
application they can just be ignored. Anyway this is still useful when debugging.
|
||||
else if( (data != 0) && (data & SD_DATA_ERROR_TOKEN_MASK) == data ) {
|
||||
// data error token
|
||||
sdspi_rx();
|
||||
break;
|
||||
} */
|
||||
return TRUE;
|
||||
} else {
|
||||
// error or timeout
|
||||
}
|
||||
|
||||
_sd_read_start_fail:
|
||||
|
|
@ -789,7 +779,7 @@ _sd_read_start_fail:
|
|||
void
|
||||
_sd_read_stop(uint16_t count)
|
||||
{
|
||||
// finish block + crc
|
||||
/* finish block + crc */
|
||||
if(count) {
|
||||
uint8_t dump;
|
||||
|
||||
|
|
@ -799,11 +789,11 @@ _sd_read_stop(uint16_t count)
|
|||
|
||||
SD_LED_READ_OFF;
|
||||
|
||||
// wait for switch to standby mode
|
||||
/* wait for switch to standby mode */
|
||||
if(!_sd_wait_standby(NULL)) {
|
||||
_sd_reset(NULL);
|
||||
}
|
||||
|
||||
// unlock uart (locked from _sd_read_start)
|
||||
/* unlock uart (locked from _sd_read_start) */
|
||||
uart_unlock(UART_MODE_SPI);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue