diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 0cfa7faac..51abe18d0 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -734,5 +734,8 @@
* examples/nsh: Added MMC/SD support for the LM3S6918
* arch/arm/src/lm3s: Fix logic for setting and clearing output GPIOs (critical
fix!).
- * drivers/mmcsd: Correct frequency calculation based on CSD settings.
+ * drivers/mmcsd: Found numerous errors in current MMC/SD SPI driver. Bad frequency
+ calculation based on CSD settings, inappropriate timeouts, odd code that looks like
+ a bad search and replace. Also needs support for SDHC ver 2.x. New MMC/SD is
+ largely redesigned and probably non-functional in the first check-in.
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index 2fb6c734d..7c22f7ea0 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -8,7 +8,7 @@
NuttX RTOS
-
Last Updated: May 23, 2009
+
Last Updated: May 26, 2009
@@ -1424,7 +1424,10 @@ nuttx-0.4.7 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
* examples/nsh: Added MMC/SD support for the LM3S6918
* arch/arm/src/lm3s: Fix logic for setting and clearing output GPIOs (critical
fix!).
- * drivers/mmcsd: Correct frequency calculation based on CSD settings.
+ * drivers/mmcsd: Found numerous errors in current MMC/SD SPI driver. Bad frequency
+ calculation based on CSD settings, inappropriate timeouts, odd code that looks like
+ a bad search and replace. Also needs support for SDHC ver 2.x. New MMC/SD is
+ largely redesigned and probably non-functional in the first check-in.
pascal-0.1.3 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index 096a6a54b..2dba9d0f5 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -286,6 +286,8 @@ defconfig -- This is a configuration file similar to the Linux
driver. Default is one.
CONFIG_MMCSD_READONLY - Provide read-only access. Default is
Read/Write
+ CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
+ Default is 20MHz.
TCP/IP and UDP support via uIP
CONFIG_NET - Enable or disable all network features
diff --git a/nuttx/configs/eagle100/httpd/defconfig b/nuttx/configs/eagle100/httpd/defconfig
index 044d5c5cb..e6b40982d 100644
--- a/nuttx/configs/eagle100/httpd/defconfig
+++ b/nuttx/configs/eagle100/httpd/defconfig
@@ -350,8 +350,12 @@ CONFIG_FS_ROMFS=n
# Number of MMC/SD slots supported by the driver
# CONFIG_MMCSD_READONLY
# Provide read-only access (default is read/write)
+# CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
+# Default is 20MHz.
+#
CONFIG_MMCSD_NSLOTS=1
CONFIG_MMCSD_READONLY=n
+CONFIG_MMCSD_SPICLOCK=12500000
#
# TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/eagle100/nettest/defconfig b/nuttx/configs/eagle100/nettest/defconfig
index c9679b551..fd74f7bed 100644
--- a/nuttx/configs/eagle100/nettest/defconfig
+++ b/nuttx/configs/eagle100/nettest/defconfig
@@ -350,8 +350,12 @@ CONFIG_FS_ROMFS=n
# Number of MMC/SD slots supported by the driver
# CONFIG_MMCSD_READONLY
# Provide read-only access (default is read/write)
+# CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
+# Default is 20MHz.
+#
CONFIG_MMCSD_NSLOTS=1
CONFIG_MMCSD_READONLY=n
+CONFIG_MMCSD_SPICLOCK=12500000
#
# TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/eagle100/nsh/defconfig b/nuttx/configs/eagle100/nsh/defconfig
index d40816e42..4bcb2decf 100644
--- a/nuttx/configs/eagle100/nsh/defconfig
+++ b/nuttx/configs/eagle100/nsh/defconfig
@@ -349,8 +349,12 @@ CONFIG_FS_ROMFS=n
# Number of MMC/SD slots supported by the driver
# CONFIG_MMCSD_READONLY
# Provide read-only access (default is read/write)
+# CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
+# Default is 20MHz.
+#
CONFIG_MMCSD_NSLOTS=1
CONFIG_MMCSD_READONLY=n
+CONFIG_MMCSD_SPICLOCK=12500000
#
# TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/eagle100/ostest/defconfig b/nuttx/configs/eagle100/ostest/defconfig
index 41f811dd1..cd430ca08 100644
--- a/nuttx/configs/eagle100/ostest/defconfig
+++ b/nuttx/configs/eagle100/ostest/defconfig
@@ -349,8 +349,12 @@ CONFIG_FS_ROMFS=n
# Number of MMC/SD slots supported by the driver
# CONFIG_MMCSD_READONLY
# Provide read-only access (default is read/write)
+# CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
+# Default is 20MHz.
+#
CONFIG_MMCSD_NSLOTS=1
CONFIG_MMCSD_READONLY=n
+CONFIG_MMCSD_SPICLOCK=12500000
#
# TCP/IP and UDP support via uIP
diff --git a/nuttx/drivers/mmcsd/mmcsd_internal.h b/nuttx/drivers/mmcsd/mmcsd_internal.h
index c49429a42..1a81b59b5 100644
--- a/nuttx/drivers/mmcsd/mmcsd_internal.h
+++ b/nuttx/drivers/mmcsd/mmcsd_internal.h
@@ -1,7 +1,7 @@
/****************************************************************************
* drivers/mmcsd/mmcsd_internal.h
*
- * Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ * Copyright (C) 20082009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt
*
* Redistribution and use in source and binary forms, with or without
@@ -57,9 +57,16 @@
/* Card type */
-#define MMCSD_CARDTYPE_UNKNOWN 0
-#define MMCSD_CARDTYPE_MMC 1
-#define MMCSD_CARDTYPE_SD 2
+#define MMCSD_CARDTYPE_UNKNOWN 0 /* Unknown card type */
+#define MMCSD_CARDTYPE_MMC 1 /* Bit 0: MMC card */
+#define MMCSD_CARDTYPE_SDV1 2 /* Bit 1: SD version 1.x */
+#define MMCSD_CARDTYPE_SDV2 4 /* Bit 1: SD version 2.x with byte addressing */
+#define MMCSD_CARDTYPE_BLOCK 8 /* Bit 2: SD version 2.x with block addressing */
+
+#define IS_MMC(t) (((t) & MMCSD_CARDTYPE_MMC) != 0)
+#define IS_SD(t) (((t) & (MMCSD_CARDTYPE_SDV1|MMCSD_CARDTYPE_SDV2)) != 0)
+#define IS_SDV2(t) (((t) & MMCSD_CARDTYPE_SDV2) != 0)
+#define IS_BLOCK(t) (((t) & MMCSD_CARDTYPE_BLOCK) != 0)
/****************************************************************************
* Public Types
diff --git a/nuttx/drivers/mmcsd/mmcsd_spi.c b/nuttx/drivers/mmcsd/mmcsd_spi.c
index 71b7a5d03..a4860cbb9 100644
--- a/nuttx/drivers/mmcsd/mmcsd_spi.c
+++ b/nuttx/drivers/mmcsd/mmcsd_spi.c
@@ -38,15 +38,17 @@
****************************************************************************/
#include
-
+#include
#include
#include
#include
+#include
#include
#include
#include
+#include
#include
#include
#include
@@ -76,6 +78,10 @@
# define MMCSD_MODE 0444
#endif
+#ifndef CONFIG_MMCSD_SPICLOCK
+# define CONFIG_MMCSD_SPICLOCK 20000000
+#endif
+
/* Slot struct info *********************************************************/
/* Slot status definitions */
@@ -90,7 +96,9 @@
#define MMCSD_CMDARG_NONE 0
#define MMCSD_CMDARG_BLKLEN 1
#define MMCSD_CMDARG_ADDRESS 2
-#define MMCSD_CMDARG_DUMMY 3
+#define MMCSD_CMDARG_NSECT 3
+#define MMCSD_CMDARG_1AA 4
+#define MMCSD_CMDARG_DUMMY 5
/* These define the value returned by the MMC/SD command */
@@ -98,13 +106,26 @@
#define MMCSD_CMDRESP_R1B 1
#define MMCSD_CMDRESP_R2 2
#define MMCSD_CMDRESP_R3 3
+#define MMCSD_CMDRESP_R7 4
-/* Fudge factor for SD read timeout: ~100msec, Write Time out ~250ms. Units
- * of Hz.
+/* Time delays in units of the system clock. CLK_TCK is the number of clock
+ * ticks per second.
*/
-#define SD_READACCESSHZ 7
-#define SD_WRITEACCESSHZ 3
+#define MMCSD_DELAY_10MS (CLK_TCK/100 + 1)
+#define MMCSD_DELAY_50MS (CLK_TCK/20 + 1)
+#define MMCSD_DELAY_100MS (CLK_TCK/10 + 1)
+#define MMCSD_DELAY_250MS (CLK_TCK/4 + 1)
+#define MMCSD_DELAY_500MS (CLK_TCK/2 + 1)
+#define MMCSD_DELAY_1SEC (CLK_TCK + 1)
+
+#define ELAPSED_TIME(t) (g_system_timer-(t))
+#define START_TIME (g_system_timer)
+
+/* SD read timeout: ~100msec, Write Time out ~250ms. Units of clock ticks */
+
+#define SD_READACCESS MMCSD_DELAY_100MS
+#define SD_WRITEACCESS MMCSD_DELAY_250MS
/****************************************************************************
* Private Types
@@ -123,6 +144,8 @@ struct mmcsd_slot_s
uint32 nsectors; /* Number of blocks on the media */
uint32 taccess; /* Card access time */
uint32 twrite; /* Card write time */
+ uint32 ocr; /* Last 4 bytes of OCR (R3) */
+ uint32 r7; /* Last 4 bytes of R7 */
};
struct mmcsd_cmdinfo_s
@@ -146,6 +169,8 @@ static int mmcsd_waitready(FAR struct mmcsd_slot_s *slot);
static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
const struct mmcsd_cmdinfo_s *cmd, uint32 arg);
static void mmcsd_setblklen(FAR struct mmcsd_slot_s *slot, uint32 length);
+static uint32 mmcsd_nsac(FAR struct mmcsd_slot_s *slot, ubyte *csd, uint32 frequency);
+static uint32 mmcsd_taac(FAR struct mmcsd_slot_s *slot, ubyte *csd);
static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd);
static void mmcsd_checkwrprotect(FAR struct mmcsd_slot_s *slot, ubyte *csd);
static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
@@ -154,6 +179,13 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
#define mmcsd_getcsd(slot, csd) mmcsd_getcardinfo(slot, csd, &g_cmd9);
#define mmcsd_getcid(slot, cid) mmcsd_getcardinfo(slot, cid, &g_cmd10);
+static int mmcsd_recvblock(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
+ int nbytes);
+#if defined(CONFIG_FS_WRITABLE) && !defined(CONFIG_MMCSD_READONLY)
+static int mmcsd_xmitblock(FAR struct mmcsd_slot_s *slot, const ubyte *buffer,
+ int nbytes, ubyte token);
+#endif
+
/* Block driver interfaces **************************************************/
static int mmcsd_open(FAR struct inode *inode);
@@ -233,38 +265,46 @@ static const uint32 g_transpeedtu[16] =
* time from the end bit of the read command to start bit of the data block.
*
* The TAAC consists of a 3-bit time unit (TU) and a 4-bit time value (TV).
- * The access we need time is then given by:
+ * TAAC is in units of time; NSAC is in units of SPI clocks.
+ * The access time we need is then given by:
*
- * taccess = spifrequency / (TU*TV) + NAC
+ * taccess = TU*TV + NSAC/spifrequency
*
- * g_taactu holds the (1 / TU / 100 ) and g_taactv holds (100 / TV) so
- * that taccess can be computed without division.
+ * 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.
*/
-static const uint32 g_taactu[8] =
+#define MAX_USTUNDX 2
+static const uint16 g_taactu[8] =
{
- 10000000, /* 0: 1 ns -> 1,000,000,000 Hz / 100 = 10,000,000 */
- 1000000, /* 1: 10 ns -> 100,000,000 Hz / 100 = 1,000,000 */
- 100000, /* 2: 100 ns -> 10,000,000 Hz / 100 = 100,000 */
- 10000, /* 3: 1 us -> 1,000,000 Hz / 100 = 10,000 */
- 1000, /* 4: 10 us -> 100,000 Hz / 100 = 1,000 */
- 100, /* 5: 100 us -> 10,000 Hz / 100 = 100 */
- 10, /* 6: 1 ms -> 1,000 Hz / 100 = 10 */
- 1, /* 7: 10 ms -> 100 Hz / 100 = 1 */
+/* Units of nanoseconds */
+
+ 1, /* 0: 1 ns */
+ 10, /* 1: 10 ns */
+ 100, /* 2: 100 ns */
+
+/* Units of microseconds */
+
+ 1, /* 3: 1 us 1,000 ns */
+ 10, /* 4: 10 us 10,000 ns */
+ 100, /* 5: 100 us 100,000 ns */
+ 1000, /* 6: 1 ms 1,000,000 ns*/
+ 10000, /* 7: 10 ms 10,000,000 ns */
};
-static const uint32 g_taactv[] =
+static const uint16 g_taactv[] =
{
- 0, 100, 83, 77, /* 0-3: Reserved, 100/1.0, 100/1.2, 100/1.3 */
- 67, 50, 40, 33, /* 4-7: 100/1.5, 100/2.0, 100/2.5, 100/3.0 */
- 29, 25, 22, 20, /* 8-11: 100/3.5, 100/4.0, 100/4.5, 100/5.0 */
- 18, 17, 14, 13 /* 12-15: 100/5.5, 100/6.0, 100/7.0, 100/8.0 */
+ 0x000, 0x100, 0x133, 0x14d, /* 0-3: Reserved, 1.0, 1.2, 1.3 */
+ 0x180, 0x200, 0x280, 0x300, /* 4-7: 1.5, 2.0, 2.5, 3.0 */
+ 0x380, 0x400, 0x480, 0x500, /* 8-11: 3.5, 4.0, 4.5, 5.0 */
+ 0x580, 0x600, 0x700, 0x800 /* 12-15: 5.5, 6.0, 7.0, 8.0 */
};
/* 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};
@@ -290,6 +330,7 @@ static const struct mmcsd_cmdinfo_s g_cmd55 = {0x77, MMCSD_CMDARG_NONE, MMCS
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};
/****************************************************************************
@@ -326,18 +367,22 @@ static int mmcsd_waitready(FAR struct mmcsd_slot_s *slot)
{
FAR struct spi_dev_s *spi = slot->spi;
ubyte response;
- int i;
+ uint32 start;
+ uint32 elapsed;
- /* Wait until the card is no longer busy */
+ /* Wait until the card is no longer busy (up to 500MS) */
- for (i = 0; i < slot->twrite; i++)
+ start = START_TIME;
+ do
{
response = SPI_SEND(spi, 0xff);
if (response == 0xff)
{
return OK;
}
+ elapsed = ELAPSED_TIME(start);
}
+ while (elapsed < MMCSD_DELAY_500MS);
fdbg("Card still busy, last response: %02x\n", response);
return -EBUSY;
@@ -391,7 +436,11 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
if (cmd->cmd == 0x40)
{
- SPI_SEND(spi, 0x95);
+ SPI_SEND(spi, 0x95); /* CRC for CMD0 */
+ }
+ else if (cmd->cmd == 0x58)
+ {
+ SPI_SEND(spi, 0x87); /* CRC for CMD8 */
}
else
{
@@ -416,44 +465,80 @@ static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
/* Interpret the response according to the command */
+ result = response;
switch (cmd->resp)
{
+ /* The R1B response is two bytes long */
+
case MMCSD_CMDRESP_R1B:
{
uint32 busy = 0;
- for (i = 0; i < slot->twrite && busy != 0xff; i++)
+ uint32 start;
+ uint32 elapsed;
+
+ start = START_TIME;
+ do
{
busy = SPI_SEND(spi, 0xff);
+ elapsed = ELAPSED_TIME(start);
}
- fvdbg("Return R1B=%02x\n", response);
+ while (elapsed < slot->twrite && busy != 0xff);
+
+ if (busy != 0xff)
+ {
+ fdbg("Failed: card still busy (%02x)\n", busy);
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ return (uint32)-1;
+ }
+
+ fvdbg("Return R1B=%04x\n", response);
}
- return (uint32)response;
+ break;
+
+ /* The R1 response is a single byte */
case MMCSD_CMDRESP_R1:
{
fvdbg("Return R1=%02x\n", response);
}
- return (uint32)response;
+ break;
+
+ /* The R2 response is two bytes long */
case MMCSD_CMDRESP_R2:
{
- result = ((uint32) response << 8) & 0x0000ff00;
+ result = ((uint32)(response & 0xff) << 8);
result |= SPI_SEND(spi, 0xff) & 0xff;
fvdbg("Return R2=%04x\n", result);
}
- return result;
+ break;
+
+ /* The R3 response is 5 bytes long */
case MMCSD_CMDRESP_R3:
+ {
+ slot->ocr = ((uint32)(response & 0xff) << 24);
+ slot->ocr |= ((uint32)(SPI_SEND(spi, 0xff) & 0xff) << 16);
+ slot->ocr |= ((uint32)(SPI_SEND(spi, 0xff) & 0xff) << 8);
+ slot->ocr |= SPI_SEND(spi, 0xff) & 0xff;
+ fvdbg("R1=%02x OCR=%08x\n", response, slot->ocr);
+ }
+
+ /* The R7 response is 5 bytes long */
+ case MMCSD_CMDRESP_R7:
default:
{
- result = ((uint32)response << 24) & 0xff000000;
- result |= ((uint32)SPI_SEND(spi, 0xff) << 16) & 0x00ff0000;
- result |= ((uint32)SPI_SEND(spi, 0xff) << 8) & 0x0000ff00;
- result |= SPI_SEND(spi, 0xff) & 0xff;
- fvdbg("Return R3=%08x\n", result);
+ slot->r7 = ((uint32)(response & 0xff) << 24);
+ 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);
}
- return result;
+ break;
}
+
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ return result;
}
/****************************************************************************
@@ -469,10 +554,67 @@ static void mmcsd_setblklen(FAR struct mmcsd_slot_s *slot, uint32 length)
FAR struct spi_dev_s *spi = slot->spi;
uint32 result;
+ SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
result = mmcsd_sendcmd(slot, &g_cmd16, length);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
}
+/****************************************************************************
+ * Name: mmcsd_nsac
+ *
+ * Description: Convert the value of the NSAC to millisconds
+ *
+ ****************************************************************************/
+
+static uint32 mmcsd_nsac(FAR struct mmcsd_slot_s *slot, ubyte *csd, uint32 frequency)
+{
+ /* NSAC is 8-bits width and is in units of 100 clock cycles. Therefore, the
+ * maximum value is 25.5K clock cycles.
+ */
+
+ uint32 nsac = MMCSD_CSD_NSAC(csd) * 100000;
+ return (nsac + (frequency >> 1)) / frequency;
+}
+
+/****************************************************************************
+ * Name: mmcsd_taac
+ *
+ * Description: Convert the value of the TAAC to millisconds
+ *
+ ****************************************************************************/
+
+static uint32 mmcsd_taac(FAR struct mmcsd_slot_s *slot, ubyte *csd)
+{
+ int tundx;
+
+ /*The TAAC consists of a 3-bit time unit (TU) and a 4-bit time value (TV).
+ * TAAC is in units of time; NSAC is in units of SPI clocks.
+ * The access time we need is then given by:
+ *
+ * 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.
+ */
+
+ tundx = MMCSD_CSD_TAAC_TIMEUNIT(csd);
+ if (tundx <= MAX_USTUNDX)
+ {
+ /* The maximum value of the nanosecond TAAC is 800 ns. The rounded
+ * answer in milliseconds will always be zero.
+ */
+
+ return 0;
+ }
+ else
+ {
+ /* Return the answer in milliseconds */
+
+ uint32 taacus = (g_taactu[tundx]*g_taactv[MMCSD_CSD_TAAC_TIMEVALUE(csd)] + 0x80) >> 8;
+ return (taacus + 500) / 1000;
+ }
+}
+
/****************************************************************************
* Name: mmcsd_decodecsd
*
@@ -484,6 +626,9 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
{
FAR struct spi_dev_s *spi = slot->spi;
uint32 frequency;
+ uint32 readbllen;
+ uint32 csizemult;
+ uint32 csize;
/* Calculate SPI max clock */
@@ -491,32 +636,48 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
g_transpeedtu[MMCSD_CSD_TRANSPEED_TIMEVALUE(csd)] *
g_transpeedru[MMCSD_CSD_TRANSPEED_TRANSFERRATEUNIT(csd)];
- if (frequency > 20000000)
+ if (frequency > CONFIG_MMCSD_SPICLOCK)
{
- frequency = 20000000;
+ frequency = CONFIG_MMCSD_SPICLOCK;
}
/* Set the SPI frequency to that value */
frequency = SPI_SETFREQUENCY(spi, frequency);
- /* Now determine the delay to */
+ /* Now determine the delay to access data */
if (slot->type == MMCSD_CARDTYPE_MMC)
{
- slot->taccess =
- g_taactu[MMCSD_CSD_TAAC_TIMEUNIT(csd)] *
- g_taactv[MMCSD_CSD_TAAC_TIMEVALUE(csd)];
+ /* The TAAC consists of a 3-bit time unit (TU) and a 4-bit time value (TV).
+ * TAAC is in units of time; NSAC is in units of SPI clocks.
+ * The access time we need is then given by:
+ *
+ * taccess = TU*TV + NSAC/spifrequency
+ *
+ * First get the access time in milliseconds.
+ */
- slot->taccess = frequency / slot->taccess;
- slot->taccess += 1 << (MMCSD_CSD_NSAC(csd) + 4);
- slot->taccess *= 10;
- slot->twrite = slot->taccess * MMCSD_CSD_R2WFACTOR(csd);
+ uint32 taccessms = 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
+ */
+
+ slot->taccess = taccessms / CLK_TCK / 100 + 1;
+
+ /* The write access time is larger by the R2WFACTOR */
+
+ slot->twrite = taccessms * MMCSD_CSD_R2WFACTOR(csd) / CLK_TCK / 100 + 1;
}
else
{
- slot->taccess = frequency / SD_READACCESSHZ;
- slot->twrite = frequency / SD_WRITEACCESSHZ;
+ /* For SD, the average is still given by the TAAC+NSAC, but the
+ * maximum are the constants 100 and 250MS
+ */
+
+ slot->taccess = SD_READACCESS;
+ slot->twrite = SD_WRITEACCESS;
}
fvdbg("Frequency: %d\n", frequency);
@@ -526,10 +687,10 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
/* Get the physical geometry of the card: sector size and number of
* sectors. The card's total capacity is computed from
*
- * capacity = BLOCKNR * BLOCK_LEN
- * BLOCKNR = (C_SIZE+1)*MULT
- * MULT = 2**(C_SIZE_MULT+2) (C_SIZE_MULT < 8)
- * BLOCK_LEN = 2**READD_BL_LEN (READ_BL_LEN < 12)
+ * capacity = BLOCKNR * BLOCK_LEN
+ * BLOCKNR = (C_SIZE+1)*MULT
+ * MULT = 2**(C_SIZE_MULT+2) (C_SIZE_MULT < 8)
+ * BLOCK_LEN = 2**READ_BL_LEN (READ_BL_LEN < 12)
*
* Or
*
@@ -540,39 +701,39 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
* nsectors = ((C_SIZE+1) << (C_SIZE_MULT + 2))
*/
- if (MMCSD_CSD_CSDSTRUCT(csd) == 1)
+ if (MMCSD_CSD_CSDSTRUCT(csd) != 0)
{
- /* SDC ver 2.00 */
+ /* SDC structure ver 2.xx */
/* Note: On SD card WRITE_BL_LEN is always the same as READ_BL_LEN */
- int readbllen = SD20_CSD_READBLLEN(csd);
- int csizemult = (SD20_CSD_CSIZEMULT(csd) + 2);
+ readbllen = SD20_CSD_READBLLEN(csd);
+ csizemult = SD20_CSD_CSIZEMULT(csd) + 2;
+ csize = SD20_CSD_CSIZE(csd) + 1;
+ }
+ else
+ {
+ /* MMC or SD structure ver 1.xx */
+ /* Note: On SD card WRITE_BL_LEN is always the same as READ_BL_LEN */
- /* "To make 2 GByte card, the Maximum Block Length (READ_BL_LEN=WRITE_BL_LEN)
- * shall be set to 1024 bytes. However, the Block Length, set by CMD16, shall
- * be up to 512 bytes to keep consistency with 512 bytes Maximum Block Length
- * cards (Less than and equal 2 Gbyte cards)."
- */
-#if 0
+ readbllen = MMCSD_CSD_READBLLEN(csd);
+ csizemult = MMCSD_CSD_CSIZEMULT(csd) + 2;
+ csize = MMCSD_CSD_CSIZE(csd) + 1;
+ }
+
+ /* SDHC cards have fixed sector size of 512 bytes */
+
+ if (IS_SDV2(slot->type))
+ {
if (readbllen > 9)
{
fdbg("Forcing 512 byte sector size\n");
csizemult += (readbllen - 9);
readbllen = 9;
}
-#endif
- slot->sectorsize = 1 << readbllen;
- slot->nsectors = (SD20_CSD_CSIZE(csd) + 1) << csizemult;
- }
- else
- {
- /* MMC or SD ver 1.xx */
- /* Note: On SD card WRITE_BL_LEN is always the same as READ_BL_LEN */
-
- slot->sectorsize = 1 << MMCSD_CSD_READBLLEN(csd);
- slot->nsectors = (MMCSD_CSD_CSIZE(csd) + 1) << (MMCSD_CSD_CSIZEMULT(csd) + 2);
}
+ slot->sectorsize = 1 << readbllen;
+ slot->nsectors = csize << csizemult;
fvdbg("Sector size: %d\n", slot->sectorsize);
fvdbg("Number of sectors: %d\n", slot->nsectors);
}
@@ -580,7 +741,7 @@ static void mmcsd_decodecsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
/****************************************************************************
* Name: mmcsd_checkwrprotect
*
- * Description:
+ * Description:
*
****************************************************************************/
@@ -621,7 +782,7 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
ubyte response;
int i;
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
SPI_SEND(spi, 0xff);
/* Send the CMD9 or CMD10 */
@@ -671,6 +832,95 @@ errout_with_eio:
return -EIO;
}
+/****************************************************************************
+ * Name: mmcsd_recvblock
+ *
+ * Description: Receive a data block from the card
+ *
+ ****************************************************************************/
+
+static int mmcsd_recvblock(FAR struct mmcsd_slot_s *slot, ubyte *buffer, int nbytes)
+{
+ FAR struct spi_dev_s *spi = slot->spi;
+ uint32 start;
+ uint32 elapsed;
+ ubyte token;
+
+ /* Wait up to the maximum to receive a valid data token. taccess is the
+ * time from when the command is sent until the first byte of data is
+ * received */
+
+ start = START_TIME;
+ do
+ {
+ token = SPI_SEND(spi, 0xff);
+ elapsed = ELAPSED_TIME(start);
+ }
+ while (token == 0xff && elapsed < slot->taccess);
+
+ if (token == MMCSD_SPIDT_STARTBLKSNGL)
+ {
+ /* Receive the block */
+
+ SPI_RECVBLOCK(spi, buffer, nbytes);
+
+ /* Discard the CRC */
+
+ SPI_SEND(spi, 0xff);
+ SPI_SEND(spi, 0xff);
+ return OK;
+ }
+
+ fdbg("Did not received data token (%02x)\n", token);
+ return ERROR;
+}
+
+/****************************************************************************
+ * Name: mmcsd_xmitblock
+ *
+ * Description: Transmit a data block to the card
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_FS_WRITABLE) && !defined(CONFIG_MMCSD_READONLY)
+static int mmcsd_xmitblock(FAR struct mmcsd_slot_s *slot, const ubyte *buffer,
+ int nbytes, ubyte token)
+{
+ FAR struct spi_dev_s *spi = slot->spi;
+ ubyte response;
+
+ /* Start the block transfer:
+ * 1. 0xff (sync)
+ * 2. 0xfe or 0xfc (start of block token)
+ * 3. Followed by the block of data and 2 byte CRC
+ */
+
+ SPI_SEND(spi, 0xff); /* sync */
+ SPI_SEND(spi, token); /* data token */
+
+ /* Transmit the block to the MMC/SD card */
+
+ (void)SPI_SNDBLOCK(spi, buffer, nbytes);
+
+ /* Add the bogus CRC. By default, the SPI interface is initialized in
+ * non-protected mode. However, we still have to send bogus CRC values
+ */
+
+ SPI_SEND(spi, 0xff);
+ SPI_SEND(spi, 0xff);
+
+ /* Now get the data response */
+
+ response = SPI_SEND(spi, 0xff);
+ if ((response & MMCSD_SPIDR_MASK) != MMCSD_SPIDR_ACCEPTED)
+ {
+ fdbg("Bad data response: %02x\n", response);
+ return -EIO;
+ }
+ return OK;
+}
+#endif /* CONFIG_FS_WRITABLE && !CONFIG_MMCSD_READONLY */
+
/****************************************************************************
* Block Driver Operations
****************************************************************************/
@@ -714,7 +964,7 @@ static int mmcsd_open(FAR struct inode *inode)
/* Select the slave */
mmcsd_semtake(&slot->sem);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
/* Verify that the MMC/SD card is alive and ready for business */
@@ -751,8 +1001,8 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
FAR struct spi_dev_s *spi;
size_t nbytes;
off_t offset;
- ubyte response;
- int i;
+ ubyte response;
+ int i;
fvdbg("start_sector=%d nsectors=%d\n", start_sector, nsectors);
@@ -801,66 +1051,85 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
/* Convert sector and nsectors to nbytes and byte offset */
nbytes = nsectors * slot->sectorsize;
- offset = start_sector * slot->sectorsize;
- fvdbg("nbytes=%d offset=%d\n", nbytes, offset);
+ if (IS_BLOCK(slot->type))
+ {
+ offset = start_sector;
+ fvdbg("nbytes=%d sector offset=%d\n", nbytes, offset);
+ }
+ else
+ {
+ offset = start_sector * slot->sectorsize;
+ fvdbg("nbytes=%d byte offset=%d\n", nbytes, offset);
+ }
/* Select the slave and synchronize */
mmcsd_semtake(&slot->sem);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
SPI_SEND(spi, 0xff);
- /* Send CMD17: Reads a block of the size selected by the SET_BLOCKLEN
- * command and verify that good R1 status is returned
- */
+ /* Single or multiple block read? */
- response = mmcsd_sendcmd(slot, &g_cmd17, offset);
- if (response != MMCSD_SPIR1_OK)
+ if (nsectors == 1)
{
- fdbg("CMD17 failed: R1=%02x\n", response);
- goto errout_with_eio;
- }
-
- /* Loop only for the computed timeout */
-
- for (i = 0; i < slot->taccess; i++)
- {
- /* Synchronize */
-
- response = SPI_SEND(spi, 0xff);
- fvdbg("(%d) SPI send returned %02x\n", i, response);
-
- /* If a read operation fails and the card cannot provide the requested
- * data, it will send a data error token instead. The 4 least
- * significant bits are the same as those in the R2 response.
+ /* Send CMD17: Reads a block of the size selected by the SET_BLOCKLEN
+ * command and verify that good R1 status is returned
*/
- if (response != 0 && (response & MMCSD_SPIDET_UPPER) == 0)
+ response = mmcsd_sendcmd(slot, &g_cmd17, offset);
+ if (response != MMCSD_SPIR1_OK)
{
- fdbg("(%d) Data transfer error: %02x\n", i, response);
+ fdbg("CMD17 failed: R1=%02x\n", response);
goto errout_with_eio;
}
- else if (response == MMCSD_SPIDT_STARTBLKSNGL)
+
+ /* Receive the block */
+
+ if (mmcsd_recvblock(slot, buffer, slot->sectorsize) != 0)
{
- /* Receive the block of data */
-
- SPI_RECVBLOCK(spi, buffer, nbytes);
-
- /* Receive and ignore the two CRC bytes */
-
- SPI_SEND(spi, 0xff);
- SPI_SEND(spi, 0xff);
-
- /* On success, return the number of sectors transfer */
-
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
- mmcsd_semgive(&slot->sem);
-
- fvdbg("(%d) Read %d bytes:\n", i, nbytes);
- mmcsd_dumpbuffer(buffer, nbytes);
- return nsectors;
+ fdbg("Failed: to receive the block\n");
+ goto errout_with_eio;
}
}
+ else
+ {
+ /* Send CMD17: Reads a block of the size selected by the SET_BLOCKLEN
+ * command and verify that good R1 status is returned
+ */
+
+ response = mmcsd_sendcmd(slot, &g_cmd18, offset);
+ if (response != MMCSD_SPIR1_OK)
+ {
+ fdbg("CMD118 failed: R1=%02x\n", response);
+ goto errout_with_eio;
+ }
+
+ /* Receive each block */
+
+ for (i = 0; i < nsectors; i++)
+ {
+ if (mmcsd_recvblock(slot, buffer, slot->sectorsize) != 0)
+ {
+ fdbg("Failed: to receive the block\n");
+ goto errout_with_eio;
+ }
+ buffer += slot->sectorsize;
+ }
+
+ /* Send CMD12: Stops transmission */
+
+ response = mmcsd_sendcmd(slot, &g_cmd12, 0);
+ }
+
+ /* On success, return the number of sectors transfer */
+
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SEND(spi, 0xff);
+ mmcsd_semgive(&slot->sem);
+
+ fvdbg("(%d) Read %d bytes:\n", elapsed, nbytes);
+ mmcsd_dumpbuffer(buffer, nbytes);
+ return nsectors;
errout_with_eio:
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
@@ -886,6 +1155,7 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
off_t offset;
ubyte response;
int ret;
+ int i;
fvdbg("start_sector=%d nsectors=%d\n", start_sector, nsectors);
@@ -942,74 +1212,102 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
/* Convert sector and nsectors to nbytes and byte offset */
nbytes = nsectors * slot->sectorsize;
- offset = start_sector * slot->sectorsize;
- fvdbg("Writing %d bytes to offset %d:\n", nbytes, offset);
+ if (IS_BLOCK(slot->type))
+ {
+ offset = start_sector;
+ fvdbg("nbytes=%d sector offset=%d\n", nbytes, offset);
+ }
+ else
+ {
+ offset = start_sector * slot->sectorsize;
+ fvdbg("nbytes=%d byte offset=%d\n", nbytes, offset);
+ }
mmcsd_dumpbuffer(buffer, nbytes);
/* Select the slave and synchronize */
mmcsd_semtake(&slot->sem);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
SPI_SEND(spi, 0xff);
- /* Send CMD24 (WRITE_BLOCK) and verify that good R1 status is returned */
+ /* Single or multiple block transfer? */
- response = mmcsd_sendcmd(slot, &g_cmd24, offset);
- if (response != MMCSD_SPIR1_OK)
+ if (nsectors == 1)
{
- fdbg("CMD24 failed: R1=%02x\n", response);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
- ret = -EIO;
- goto errout_with_sem;
+ /* Send CMD24 (WRITE_BLOCK) and verify that good R1 status is returned */
+
+ response = mmcsd_sendcmd(slot, &g_cmd24, offset);
+ if (response != MMCSD_SPIR1_OK)
+ {
+ fdbg("CMD24 failed: R1=%02x\n", response);
+ goto errout_with_sem;
+ }
+
+ /* Then transfer the sector */
+
+ if (mmcsd_xmitblock(slot, buffer, slot->sectorsize, 0xfe) != 0)
+ {
+ fdbg("Block transfer failed\n");
+ goto errout_with_sem;
+ }
}
-
- /* Start the block transfer:
- * 1. 0xff (sync)
- * 2. 0xfe (start of block)
- * 3. Followed by the block of data
- */
-
- SPI_SEND(spi, 0xff);
- SPI_SEND(spi, MMCSD_SPIDT_STARTBLKSNGL);
- (void)SPI_SNDBLOCK(spi, buffer, nbytes);
-
- /* Add the bogus CRC. By default, the SPI interface is initialized in
- * non-protected mode. However, we still have to send bogus CRC values
- */
-
- SPI_SEND(spi, 0xff);
- SPI_SEND(spi, 0xff);
-
- /* Now get the data response */
-
- response = SPI_SEND(spi, 0xff);
- if ((response & MMCSD_SPIDR_MASK) != MMCSD_SPIDR_ACCEPTED)
+ else
{
- fdbg("Bad data response: %02x\n", response);
- ret = -EIO;
- goto errout_with_sem;
+ /* Set the number of blocks to be pre-erased (SD only) */
+
+ if (IS_SD(slot->type))
+ {
+ response = mmcsd_sendcmd(slot, &g_acmd23, nsectors);
+ if (response != MMCSD_SPIR1_OK)
+ {
+ fdbg("ACMD23 failed: R1=%02x\n", response);
+ goto errout_with_sem;
+ }
+ }
+
+ /* Send CMD25: Continuously write blocks of data until the
+ * tranmission is stopped.
+ */
+
+ response = mmcsd_sendcmd(slot, &g_cmd25, offset);
+ if (response != MMCSD_SPIR1_OK)
+ {
+ fdbg("CMD25 failed: R1=%02x\n", response);
+ goto errout_with_sem;
+ }
+
+ /* Transmit each block */
+
+ for (i = 0; i < nsectors; i++)
+ {
+ if (mmcsd_xmitblock(slot, buffer, slot->sectorsize, 0xfc) != 0)
+ {
+ fdbg("Failed: to receive the block\n");
+ goto errout_with_sem;
+ }
+ buffer += slot->sectorsize;
+ }
+
+ /* Send the stop transmission token */
+
+ SPI_SEND(spi, MMCSD_SPIDT_STOPTRANS);
}
/* Wait until the card is no longer busy */
ret = mmcsd_waitready(slot);
SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SEND(spi, 0xff);
mmcsd_semgive(&slot->sem);
- /* Verify that the card successfully became non-busy */
-
- if (ret < 0)
- {
- return ret;
- }
-
/* The success return value is the number of sectors written */
return nsectors;
errout_with_sem:
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
mmcsd_semgive(&slot->sem);
- return ret;
+ return -EIO;
}
#endif
@@ -1118,6 +1416,8 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
FAR struct spi_dev_s *spi = slot->spi;
ubyte csd[16];
uint32 result = MMCSD_SPIR1_IDLESTATE;
+ uint32 start;
+ uint32 elapsed;
int i, j;
/* Assume that the card is not ready (we'll clear this on successful car
@@ -1145,7 +1445,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
/* Set the maximum access time out */
- slot->taccess = MMCSD_IDMODE_CLOCK / SD_READACCESSHZ;
+ slot->taccess = SD_READACCESS;
/* The SD card wakes up in SD mode. It will enter SPI mode if the chip select signal is
* asserted (negative) during the reception of the reset command (CMD0) and the card is in
@@ -1157,7 +1457,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
fvdbg("Send CMD0\n");
for (i = 0; i < 2; i++)
{
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
for (j = 10; j; j--)
{
@@ -1186,62 +1486,141 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
return -EIO;
}
- /* Determinate Card type SD or MMC */
+ slot->type = MMCSD_CARDTYPE_UNKNOWN;
- slot->type = MMCSD_CARDTYPE_MMC;
+ /* Check for SDHC Version 2.x. CMD 8 is reserved on SD version 1.0 and MMC. */
- for (i = 100; i; --i)
+ 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)
{
- fvdbg("%d. Send CMD55\n", i);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
- SPI_SEND(spi, 0xff);
- result = mmcsd_sendcmd(slot, &g_cmd55, 0);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ /* Should also check the operating voltage here */
- fvdbg("%d. Send ACMD41\n", i);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
- SPI_SEND(spi, 0xff);
- result = mmcsd_sendcmd(slot, &g_acmd41, 0);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
-
- /* If this is an MMC card, it will response with ILLEGAL COMMAND */
-
- if (result & MMCSD_SPIR1_ILLEGALCMD)
+ if ((slot->r7 & MMCSD_SPIR7_ECHO_MASK) == 0xaa)
{
- /* MMC card may be CMD1 for MMC Init sequence will be complete within
- * 500ms */
+ /* Try CMD55/ACMD41 up to 100 times */
- for (i = 100; i; --i)
+ start = START_TIME;
+ elapsed = 0;
+ do
{
- fvdbg("%d. Send CMD1\n", i);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ fvdbg("%d. Send CMD55\n", i);
SPI_SEND(spi, 0xff);
- result = mmcsd_sendcmd(slot, &g_cmd1, 0);
- SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
-
- if (result == MMCSD_SPIR1_OK)
+ result = mmcsd_sendcmd(slot, &g_cmd55, 0);
+ if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
{
- fvdbg("%d. Identified MMC card\n", i);
- slot->type = MMCSD_CARDTYPE_MMC;
- break;
+ fvdbg("%d. Send ACMD41\n", i);
+ SPI_SEND(spi, 0xff);
+ result = mmcsd_sendcmd(slot, &g_acmd41, 1 << 30);
+ if (result == MMCSD_SPIR1_OK)
+ {
+ break;
+ }
}
- up_mdelay(50);
+ elapsed = ELAPSED_TIME(start);
}
- break;
- }
- else if (result == MMCSD_SPIR1_OK)
- {
- fvdbg("%d. Identified SD card\n", i);
- slot->type = MMCSD_CARDTYPE_SD;
- break;
- }
+ while (elapsed < MMCSD_DELAY_1SEC);
- up_mdelay(50);
+ /* Check if ACMD41 was sent successfully */
+
+ if (elapsed < MMCSD_DELAY_1SEC)
+ {
+ fvdbg("Send CMD58\n");
+ SPI_SEND(spi, 0xff);
+ result = mmcsd_sendcmd(slot, &g_cmd58, 0);
+ if (result == MMCSD_SPIR1_OK)
+ {
+ fvdbg("OCR: %08x\n", slot->ocr);
+ if ((slot->ocr & MMCSD_OCR_CCS) != 0)
+ {
+ fdbg("Identified SD ver2 card/with block access\n");
+ slot->type = MMCSD_CARDTYPE_SDV2|MMCSD_CARDTYPE_BLOCK;
+ }
+ else
+ {
+ fdbg("Identified SD ver2 card\n");
+ slot->type = MMCSD_CARDTYPE_SDV2;
+ }
+ }
+ }
+ }
}
- if (i == 0)
+ /* Check for SDC version 1.x or MMC */
+
+ else
{
- fdbg("Retry exhausted\n");
+ /* Both the MMC card and the SD card support CMD55 */
+
+ fvdbg("Send CMD55\n");
+ SPI_SEND(spi, 0xff);
+ result = mmcsd_sendcmd(slot, &g_cmd55, 0);
+ if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
+ {
+ /* But ACMD41 is supported only on SD */
+
+ fvdbg("Send ACMD41\n");
+ SPI_SEND(spi, 0xff);
+ result = mmcsd_sendcmd(slot, &g_acmd41, 0);
+ if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
+ {
+ fdbg("Identified SD ver1 card\n");
+ slot->type = MMCSD_CARDTYPE_SDV1;
+ }
+ }
+
+ /* Make sure that we are out of the Idle state */
+
+ start = START_TIME;
+ elapsed = 0;
+ do
+ {
+ if (IS_SD(slot->type))
+ {
+ fvdbg("%d. Send CMD55\n", i);
+ result = mmcsd_sendcmd(slot, &g_cmd55, 0);
+ if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
+ {
+ fvdbg("%d. Send ACMD41\n", i);
+ SPI_SEND(spi, 0xff);
+ result = mmcsd_sendcmd(slot, &g_acmd41, 0);
+ if (result == MMCSD_SPIR1_OK)
+ {
+ break;
+ }
+ }
+ }
+ else
+ {
+ fvdbg("%d. Send CMD1\n", i);
+ SPI_SEND(spi, 0xff);
+ result = mmcsd_sendcmd(slot, &g_cmd1, 0);
+ if (result == MMCSD_SPIR1_OK)
+ {
+ fdbg("%d. Identified MMC card\n", i);
+ slot->type = MMCSD_CARDTYPE_MMC;
+ break;
+ }
+ }
+ elapsed = ELAPSED_TIME(start);
+ }
+ while (elapsed < MMCSD_DELAY_1SEC);
+
+ if (elapsed >= MMCSD_DELAY_1SEC)
+ {
+ fdbg("Failed to exit IDLE state\n");
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
+ return -EIO;
+ }
+ }
+
+ if (slot->type == MMCSD_CARDTYPE_UNKNOWN)
+ {
+ fdbg("Failed to identify card\n");
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return -EIO;
}
@@ -1252,31 +1631,25 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
if (result != OK)
{
fdbg("mmcsd_getcsd(CMD9) failed: %d\n", result);
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return -EIO;
}
-
-#if defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_FS)
- if (slot->type == MMCSD_CARDTYPE_MMC)
- {
- fdbg("Found MMC card\n");
- }
- else if (MMCSD_CSD_CSDSTRUCT(csd) == 1)
- {
- fdbg("Found SDHC card\n");
- }
- else
- {
- fdbg("Found SD card\n");
- }
mmcsd_dmpcsd(csd, slot->type);
-#endif
/* CSD data and set block size */
mmcsd_decodecsd(slot, csd);
mmcsd_checkwrprotect(slot, csd);
- mmcsd_setblklen(slot, slot->sectorsize);
+
+ /* SD Version block length is always 512 */
+
+ if (!IS_SDV2(slot->type))
+ {
+ mmcsd_setblklen(slot, slot->sectorsize);
+ }
+
slot->state &= ~MMCSD_SLOTSTATUS_NOTREADY;
+ SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
return OK;
}
diff --git a/nuttx/drivers/mmcsd/mmcsd_spi.h b/nuttx/drivers/mmcsd/mmcsd_spi.h
index dea902446..7ad59aee1 100644
--- a/nuttx/drivers/mmcsd/mmcsd_spi.h
+++ b/nuttx/drivers/mmcsd/mmcsd_spi.h
@@ -79,6 +79,15 @@
#define MMCSD_SPIR2_ADDRERROR 0x2000 /* Address error */
#define MMCSD_SPIR2_PARAMERROR 0x4000 /* Parameter error */
+/* Last 4 bytes of the 5 byte R7 response */
+
+#define MMCSD_SPIR7_VERSION_SHIFT 28 /* Bits 28-31: Command version number */
+#define MMCSD_SPIR7_VERSION_MASK (0x0f << MMCSD_SPIR7_VERSION_SHIFT)
+#define MMCSD_SPIR7_VOLTAGE_SHIFT 8 /* Bits 8-11: Voltage accepted */
+#define MMCSD_SPIR7_VOLTAGE_MASK (0x0f << MMCSD_SPIR7_VOLTAGE_SHIFT)
+#define MMCSD_SPIR7_ECHO_SHIFT 0 /* Bits 0-7: Echoed check pattern */
+#define MMCSD_SPIR7_ECHO_MASK (0x0f << MMCSD_SPIR7_ECHO_SHIFT)
+
/* Data Response */
#define MMCSD_SPIDR_MASK 0x1f /* Mask for valid data response bits */
@@ -100,6 +109,20 @@
#define MMCSD_SPIDET_CARDECCFAIL 0x04 /* Card ECC failed */
#define MMCSD_SPIDET_OUTOFRANGE 0x08 /* Out of range */
+/* Operating Conditions register */
+
+#define MMCSD_OCR_V27 (1 << 15) /* Bit 15: 2.7-2.8V */
+#define MMCSD_OCR_V28 (1 << 16) /* Bit 16: 2.8-2.9V */
+#define MMCSD_OCR_V29 (1 << 17) /* Bit 17: 2.9-3.0V */
+#define MMCSD_OCR_V30 (1 << 18) /* Bit 18: 3.0-3.1V */
+#define MMCSD_OCR_V31 (1 << 19) /* Bit 19: 3.1-3.2V */
+#define MMCSD_OCR_V32 (1 << 20) /* Bit 20: 3.2-3.3V */
+#define MMCSD_OCR_V33 (1 << 21) /* Bit 21: 3.3-3.4V */
+#define MMCSD_OCR_V34 (1 << 22) /* Bit 22: 3.4-3.5V */
+#define MMCSD_OCR_V35 (1 << 23) /* Bit 23: 3.5-3.6V */
+#define MMCSD_OCR_CCS (1 << 30) /* Bit 30: Card capacity status */
+#define MMCSD_OCR_BUSY (1 << 31) /* Bit 31: Card powered up status bit */
+
/****************************************************************************
* Public Types
****************************************************************************/