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Integrating new MMC/SD design

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1827 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2009-05-26 23:45:45 +00:00
parent d68f3bc37a
commit e832c2ac9b
3 changed files with 144 additions and 100 deletions
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drivers/mmcsd/mmcsd_spi.c
+92 -93
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@@ -38,7 +38,6 @@
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <stdio.h>
@@ -153,6 +152,7 @@ struct mmcsd_cmdinfo_s
ubyte cmd;
ubyte arg;
ubyte resp;
ubyte chksum;
};
/****************************************************************************
@@ -271,7 +271,7 @@ static const uint32 g_transpeedtu[16] =
* taccess = TU*TV + NSAC/spifrequency
*
* g_taactu holds TU in units of nanoseconds and microseconds (you have to use
* the index to distiguish. g_taactv holds TV with 8-bits of fraction.
* the index to distiguish). g_taactv holds TV with 8-bits of fraction.
*/
#define MAX_USTUNDX 2
@@ -302,36 +302,21 @@ static const uint16 g_taactv[] =
/* Commands *****************************************************************/
static const struct mmcsd_cmdinfo_s g_cmd0 = {0x40, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd1 = {0x41, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd8 = {0x48, MMCSD_CMDARG_1AA, MMCSD_CMDRESP_R7};
static const struct mmcsd_cmdinfo_s g_cmd9 = {0x49, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd10 = {0x4a, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd12 = {0x4c, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd13 = {0x4d, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R2};
static const struct mmcsd_cmdinfo_s g_cmd16 = {0x50, MMCSD_CMDARG_BLKLEN, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd17 = {0x51, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd18 = {0x52, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd24 = {0x58, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd25 = {0x59, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd27 = {0x5b, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd28 = {0x5c, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1B};
static const struct mmcsd_cmdinfo_s g_cmd29 = {0x5d, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1B};
static const struct mmcsd_cmdinfo_s g_cmd30 = {0x5e, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd32 = {0x60, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd33 = {0x61, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd34 = {0x62, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd35 = {0x63, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd36 = {0x64, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd37 = {0x65, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd38 = {0x66, MMCSD_CMDARG_DUMMY, MMCSD_CMDRESP_R1B};
static const struct mmcsd_cmdinfo_s g_cmd42 = {0x6a, MMCSD_CMDARG_DUMMY, MMCSD_CMDRESP_R1B};
static const struct mmcsd_cmdinfo_s g_cmd55 = {0x77, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd56 = {0x78, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd58 = {0x7a, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R3};
static const struct mmcsd_cmdinfo_s g_cmd59 = {0x7b, MMCSD_CMDARG_DUMMY, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_acmd23 = {0x69, MMCSD_CMDARG_NSECT, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_acmd41 = {0x69, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1};
static const struct mmcsd_cmdinfo_s g_cmd0 = {CMD0, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0x95};
static const struct mmcsd_cmdinfo_s g_cmd1 = {CMD1, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd8 = {CMD8, MMCSD_CMDARG_1AA, MMCSD_CMDRESP_R7, 0x87};
static const struct mmcsd_cmdinfo_s g_cmd9 = {CMD9, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd10 = {CMD10, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd12 = {CMD12, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd16 = {CMD16, MMCSD_CMDARG_BLKLEN, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd17 = {CMD17, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd18 = {CMD18, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd24 = {CMD24, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd25 = {CMD25, MMCSD_CMDARG_ADDRESS, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd55 = {CMD55, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_cmd58 = {CMD58, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R3, 0xff};
static const struct mmcsd_cmdinfo_s g_acmd23 = {ACMD23, MMCSD_CMDARG_NSECT, MMCSD_CMDRESP_R1, 0xff};
static const struct mmcsd_cmdinfo_s g_acmd41 = {ACMD41, MMCSD_CMDARG_NONE, MMCSD_CMDRESP_R1, 0xff};
/****************************************************************************
* Private Functions
@@ -361,6 +346,9 @@ static void mmcsd_semtake(sem_t *sem)
* Description:
* Wait until the the card is no longer busy
*
* Assumptions:
* MMC/SD card already selected
*
****************************************************************************/
static int mmcsd_waitready(FAR struct mmcsd_slot_s *slot)
@@ -394,6 +382,9 @@ static int mmcsd_waitready(FAR struct mmcsd_slot_s *slot)
* Description:
* Send a command to MMC
*
* Assumptions:
* MMC/SD card already selected
*
****************************************************************************/
static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
@@ -404,10 +395,6 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
ubyte response = 0xff;
int i;
/* Select SPI */
SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
/* Send command code */
SPI_SEND(spi, cmd->cmd);
@@ -430,19 +417,16 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
}
/* Send CRC if needed. The SPI interface is initialized in non-protected
* mode. However, the reset command (CMD0) is received by the card while it
* is still in SD mode and, therefore, must have a valid CRC field.
* mode. However, the reset command (CMD0) and CMD8 are received by the
* card while it is still in SD mode and, therefore, must have a valid
* CRC field.
*/
if (cmd->cmd == 0x40)
{
SPI_SEND(spi, 0x95); /* CRC for CMD0 */
}
else if (cmd->cmd == 0x58)
{
SPI_SEND(spi, 0x87); /* CRC for CMD8 */
}
else
SPI_SEND(spi, cmd->chksum);
/* Skip stuff byte on CMD12 */
if (cmd->cmd == CMD12)
{
SPI_SEND(spi, 0xff);
}
@@ -459,7 +443,6 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
if ((response & 0x80) != 0)
{
fdbg("Failed: i=%d response=%02x\n", i, response);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return (uint32)-1;
}
@@ -487,7 +470,6 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
if (busy != 0xff)
{
fdbg("Failed: card still busy (%02x)\n", busy);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return (uint32)-1;
}
@@ -532,12 +514,11 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
slot->r7 |= ((uint32)(SPI_SEND(spi, 0xff) & 0xff) << 16);
slot->r7 |= ((uint32)(SPI_SEND(spi, 0xff) & 0xff) << 8);
slot->r7 |= SPI_SEND(spi, 0xff) & 0xff;
fvdbg("R1=%08x R7=%08x\n", response, slot->r7);
fvdbg("R1=%02x R7=%08x\n", response, slot->r7);
}
break;
}
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return result;
}
@@ -547,22 +528,27 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
* Description:
* Set block length
*
* Assumptions:
* MMC/SD card already selected
*
****************************************************************************/
static void mmcsd_setblklen(FAR struct mmcsd_slot_s *slot, uint32 length)
{
FAR struct spi_dev_s *spi = slot->spi;
uint32 result;
uint32 response;
SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
result = mmcsd_sendcmd(slot, &g_cmd16, length);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
fvdbg("Set block length to %d\n", length);
response = mmcsd_sendcmd(slot, &g_cmd16, length);
if (response != MMCSD_SPIR1_OK)
{
fdbg("Failed to set block length: %02x\n", response);
}
}
/****************************************************************************
* Name: mmcsd_nsac
*
* Description: Convert the value of the NSAC to millisconds
* Description: Convert the value of the NSAC to microseconds
*
****************************************************************************/
@@ -572,14 +558,15 @@ static uint32 mmcsd_nsac(FAR struct mmcsd_slot_s *slot, ubyte *csd, uint32 frequ
* maximum value is 25.5K clock cycles.
*/
uint32 nsac = MMCSD_CSD_NSAC(csd) * 100000;
return (nsac + (frequency >> 1)) / frequency;
uint32 nsac = MMCSD_CSD_NSAC(csd) * (100*1000); /* 1,000 * NSAC */
uint32 fhkz = (frequency + 500) / 1000; /* frequency / 1,000 */
return (nsac + (fhkz >> 1)) / fhkz; /* 1,000,000 * NSAC / frequency */
}
/****************************************************************************
* Name: mmcsd_taac
*
* Description: Convert the value of the TAAC to millisconds
* Description: Convert the value of the TAAC to microseconds
*
****************************************************************************/
@@ -601,17 +588,16 @@ static uint32 mmcsd_taac(FAR struct mmcsd_slot_s *slot, ubyte *csd)
if (tundx <= MAX_USTUNDX)
{
/* The maximum value of the nanosecond TAAC is 800 ns. The rounded
* answer in milliseconds will always be zero.
* answer in microseconds will be at most 1.
*/
return 0;
return 1;
}
else
{
/* Return the answer in milliseconds */
/* Return the answer in microseconds */
uint32 taacus = (g_taactu[tundx]*g_taactv[MMCSD_CSD_TAAC_TIMEVALUE(csd)] + 0x80) >> 8;
return (taacus + 500) / 1000;
return (g_taactu[tundx]*g_taactv[MMCSD_CSD_TAAC_TIMEVALUE(csd)] + 0x80) >> 8;
}
}
@@ -625,6 +611,7 @@ static uint32 mmcsd_taac(FAR struct mmcsd_slot_s *slot, ubyte *csd)
static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
{
FAR struct spi_dev_s *spi = slot->spi;
uint32 maxfrequency;
uint32 frequency;
uint32 readbllen;
uint32 csizemult;
@@ -632,16 +619,19 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
/* Calculate SPI max clock */
frequency =
maxfrequency =
g_transpeedtu[MMCSD_CSD_TRANSPEED_TIMEVALUE(csd)] *
g_transpeedru[MMCSD_CSD_TRANSPEED_TRANSFERRATEUNIT(csd)];
/* Clip the max frequency to account for board limitations */
frequency = maxfrequency;
if (frequency > CONFIG_MMCSD_SPICLOCK)
{
frequency = CONFIG_MMCSD_SPICLOCK;
}
/* Set the SPI frequency to that value */
/* Set the actual SPI frequency as close as possible to that value */
frequency = SPI_SETFREQUENCY(spi, frequency);
@@ -655,20 +645,26 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
*
* taccess = TU*TV + NSAC/spifrequency
*
* First get the access time in milliseconds.
* Example: TAAC = 1.5 ms, NSAC = 0, r2wfactor = 4, CLK_TCK=100
* taccessus = 1,500uS
* taccess = (1,500 * 100) / 100,000) + 1 = 2 (ideal, 1.5)
* twrite = (1,500 * 4 * 100) / 100,000) + 1 = 7 (ideal 6.0)
*
* First get the access time in microseconds
*/
uint32 taccessms = mmcsd_taac(slot, csd) + mmcsd_nsac(slot, csd, frequency);
uint32 taccessus = mmcsd_taac(slot, csd) + mmcsd_nsac(slot, csd, frequency);
/* Then convert to system clock ticks. The maximum read access is 10 * the
* tacc value: taccess = 10 * taccessms / CLK_TCK / 1000, or
/* Then convert to system clock ticks. The maximum read access is 10 times
* the tacc value: taccess = 10 * (taccessus / 1,000,000) * CLK_TCK, or
*/
slot->taccess = taccessms / CLK_TCK / 100 + 1;
slot->taccess = (taccessus * CLK_TCK) / 100000 + 1;
/* The write access time is larger by the R2WFACTOR */
/* NOTE that we add one to taccess to assure that we wait at least this
* time. The write access time is larger by the R2WFACTOR: */
slot->twrite = taccessms * MMCSD_CSD_R2WFACTOR(csd) / CLK_TCK / 100 + 1;
slot->taccess = (taccessus * MMCSD_CSD_R2WFACTOR(csd) * CLK_TCK) / 100000 + 1;
}
else
{
@@ -680,9 +676,11 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
slot->twrite = SD_WRITEACCESS;
}
fvdbg("Frequency: %d\n", frequency);
fvdbg("Read access time: %d\n", slot->taccess);
fvdbg("Write access time: %d\n", slot->twrite);
fvdbg("SPI Frequency\n");
fvdbg(" Maximum: %d Hz\n", maxfrequency);
fvdbg(" Actual: %d Hz\n", frequency);
fvdbg("Read access time: %d ticks\n", slot->taccess);
fvdbg("Write access time: %d ticks\n", slot->twrite);
/* Get the physical geometry of the card: sector size and number of
* sectors. The card's total capacity is computed from
@@ -772,6 +770,9 @@ static void mmcsd_checkwrprotect(FAR struct mmcsd_slot_s *slot, ubyte *csd)
* Description:
* Read CSD or CID registers
*
* Assumptions:
* MMC/SD card already selected
*
****************************************************************************/
static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
@@ -782,7 +783,6 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
ubyte response;
int i;
SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
SPI_SEND(spi, 0xff);
/* Send the CMD9 or CMD10 */
@@ -791,7 +791,7 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
if (result != MMCSD_SPIR1_OK)
{
fdbg("CMD9/10 failed: R1=%02x\n", result);
goto errout_with_eio;
return -EIO;
}
/* Try up to 8 times to find the start of block (or until an error occurs) */
@@ -809,7 +809,7 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
if (response != 0 && (response & MMCSD_SPIDET_UPPER) == 0)
{
fdbg("%d. Data transfer error: %02x\n", i, response);
goto errout_with_eio;
return -EIO;
}
else if (response == MMCSD_SPIDT_STARTBLKSNGL)
{
@@ -822,13 +822,11 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
SPI_SEND(spi, 0xff);
SPI_SEND(spi, 0xff);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return OK;
}
}
errout_with_eio:
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
fdbg("%d. Did not find start of block\n");
return -EIO;
}
@@ -1127,7 +1125,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
SPI_SEND(spi, 0xff);
mmcsd_semgive(&slot->sem);
fvdbg("(%d) Read %d bytes:\n", elapsed, nbytes);
fvdbg("Read %d bytes:\n", nbytes);
mmcsd_dumpbuffer(buffer, nbytes);
return nsectors;
@@ -1356,7 +1354,10 @@ static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
/* Re-sample the CSD */
mmcsd_semtake(&slot->sem);
SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
ret = mmcsd_getcsd(slot, csd);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
if (ret < 0)
{
mmcsd_semgive(&slot->sem);
@@ -1420,7 +1421,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
uint32 elapsed;
int i, j;
/* Assume that the card is not ready (we'll clear this on successful car
/* Assume that the card is not ready (we'll clear this on successful card
* initialization.
*/
@@ -1458,19 +1459,18 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
for (i = 0; i < 2; i++)
{
SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
SPI_SEND(spi, 0xff);
for (j = 10; j; j--)
{
SPI_SEND(spi, 0xff);
}
/* Send CMD0 (GO_TO_IDLE) to put MMC/SD in IDLE/SPI mode */
/* Send CMD0 (GO_TO_IDLE) to put MMC/SD in IDLE/SPI mode.
* Return from CMD0 is R1 which should now show IDLE STATE
*/
result = mmcsd_sendcmd(slot, &g_cmd0, 0);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
/* Return from CMD0 is R1 which should now show IDLE STATE */
if (result == MMCSD_SPIR1_IDLESTATE)
{
fvdbg("Card is in IDLE state\n");
@@ -1483,6 +1483,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
if (result != MMCSD_SPIR1_IDLESTATE)
{
fdbg("Send CMD0 failed: R1=%02x\n", result);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return -EIO;
}
@@ -1491,8 +1492,6 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
/* Check for SDHC Version 2.x. CMD 8 is reserved on SD version 1.0 and MMC. */
fvdbg("Send CMD8\n");
SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
SPI_SEND(spi, 0xff);
result = mmcsd_sendcmd(slot, &g_cmd8, 0x1aa);
if (result == MMCSD_SPIR1_IDLESTATE)
@@ -1641,7 +1640,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
mmcsd_decodecsd(slot, csd);
mmcsd_checkwrprotect(slot, csd);
/* SD Version block length is always 512 */
/* SD Version 2.xx block length is always 512 */
if (!IS_SDV2(slot->type))
{