Changeset 501

Timestamp:

Aug 29, 2013, 11:35:11 AM (11 years ago)

Author:

bouyer

Message:

Add support for >= v2, SDHC cards (larger than 2GB).
Tested with a 512MB < v2 and a 4GB cards.

Location:

trunk/softs/tsar_boot

Files:

• include/sdcard.h (modified) (3 diffs)
• src/sdcard.c (modified) (6 diffs)

trunk/softs/tsar_boot/include/sdcard.h

@@ -23 +23 @@
 
     /**
-     * Capacity of the SDCARD in terms of bytes
-     */
-    unsigned int capacity;
-
-    /**
      * Block length of the SDCARD
      */
@@ -46 +41 @@
      */
     int    slave_id;
+
+    /* is the card high capacity ? */
+    int sdhc;
 };
 
@@ -105 +103 @@
  */
 void sdcard_dev_lseek(struct sdcard_dev * sdcard, unsigned int pos);
-
-/**
- * \param   sdcard  : Pointer to the initialized block device
- *
- * \return  block device capacity
- *
- * \brief   Get the block device capacity
- * 
- * The block device access pointer is relocated in terms of blocks
- */
-unsigned int sdcard_dev_get_capacity(struct sdcard_dev * sdcard);
 
 /**

trunk/softs/tsar_boot/src/sdcard.c

@@ -8 +8 @@
 
 #include <sdcard.h>
+#include <boot_tty.h>
 
 /**
@@ -157 +158 @@
 int sdcard_dev_open(struct sdcard_dev * sdcard, struct spi_dev * spi, int ss)
 {
-    unsigned char args[4];
+        unsigned char args[4];
         unsigned char sdcard_rsp;
-        unsigned int  iter;
+        unsigned int  iter, ersp;
 
         sdcard->spi      = spi;
-    sdcard->slave_id = ss;
+        sdcard->slave_id = ss;
 
         /* 
-     * Supply SD card ramp up time (min 74 cycles)
-     */
+        * Supply SD card ramp up time (min 74 cycles)
+        */
         _sdcard_gen_tick(sdcard, 10);
 
-    /* 
-     * Assert slave select signal
-     * Send CMD0 (Reset Command)
-     * Deassert slave select signal
-     */
+        /* 
+        * Assert slave select signal
+        * Send CMD0 (Reset Command)
+        * Deassert slave select signal
+        */
         _sdcard_enable(sdcard);
 
-    args[0] = 0;
-    args[1] = 0;
-    args[2] = 0;
-    args[3] = 0;
+        args[0] = 0;
+        args[1] = 0;
+        args[2] = 0;
+        args[3] = 0;
         sdcard_rsp = _sdcard_send_command(sdcard, 0, SDCARD_CMD, args, 0x4A);
         if ( sdcard_rsp != 0x01 )
         {
+                boot_puts("card CMD0 failed ");
                 return sdcard_rsp;
         }
 
         _sdcard_disable(sdcard);
+        /*
+         * send CMD8. If card is pre-v2, It will reply with illegal command.
+         * Otherwise we announce sdhc support.
+         */
         _sdcard_enable(sdcard);
+        args[0] = 0;
+        args[1] = 0;
+        args[2] = 0x01;
+        args[3] = 0x01;
+        sdcard_rsp = _sdcard_send_command(sdcard, 8, SDCARD_CMD, args, 0x63);
+        if (!SDCARD_CHECK_R1_VALID(sdcard_rsp)) {
+                boot_puts("card CMD8 failed ");
+                return sdcard_rsp;
+        }
+        if (!SDCARD_CHECK_R1_ERROR(sdcard_rsp)) {
+                /* no error, command accepted. get whole reply */
+                ersp = _sdcard_receive_char(sdcard);
+                ersp = (ersp << 8) | _sdcard_receive_char(sdcard);
+                ersp = (ersp << 8) | _sdcard_receive_char(sdcard);
+                ersp = (ersp << 8) | _sdcard_receive_char(sdcard);
+                if ((ersp & 0xffff) != 0x0101) {
+                        /* voltage mismatch */
+                        boot_puts("card CMD8 mismatch: ");
+                        boot_putx(ersp);
+                        return sdcard_rsp;
+                }
+                boot_puts("v2 or later ");
+                sdcard->sdhc = 1;
+        } else if ((sdcard_rsp & SDCARD_R1_ILLEGAL_CMD) == 0) {
+                /* other error */
+                boot_puts("card CMD8 error ");
+                return sdcard_rsp;
+        } else {
+                sdcard->sdhc = 0;
+        }
+        _sdcard_disable(sdcard);
+        /* send CMD41, enabling the card */
+        _sdcard_enable(sdcard);
+        args[0] = sdcard->sdhc ? 0x40: 0;
+        args[1] = 0;
+        args[2] = 0;
+        args[3] = 0;
 
         iter = 0;
@@ -202 +245 @@
 
         _sdcard_disable(sdcard);
-
-        return sdcard_rsp;
+        if (sdcard_rsp) {
+                boot_puts("SD ACMD41 failed ");
+                return sdcard_rsp;
+        }
+        if (sdcard->sdhc != 0) {
+                /* get the card capacity to see if it's really HC */
+                _sdcard_enable(sdcard);
+                args[0] = sdcard->sdhc ? 0x40: 0;
+                args[1] = 0;
+                args[2] = 0;
+                args[3] = 0;
+                sdcard_rsp = _sdcard_send_command(sdcard, 58, SDCARD_CMD,
+                    args, 0x00);
+                if (sdcard_rsp) {
+                        boot_puts("SD CMD58 failed ");
+                        return sdcard_rsp;
+                }
+                ersp = _sdcard_receive_char(sdcard);
+                ersp = (ersp << 8) | _sdcard_receive_char(sdcard);
+                ersp = (ersp << 8) | _sdcard_receive_char(sdcard);
+                ersp = (ersp << 8) | _sdcard_receive_char(sdcard);
+                if (ersp & 0x40000000) {
+                        boot_puts("SDHC ");
+                } else {
+                        sdcard->sdhc = 0;
+                }
+                _sdcard_disable(sdcard);
+        }
+        boot_puts("card detected ");
+        return 0;
 }
 
@@ -235 +306 @@
      */
     i = count;
-    while( i++ < (sdcard->block_length + 2) ) _sdcard_receive_char(sdcard);
+    while( i++ < (512 + 2) ) _sdcard_receive_char(sdcard);
 
     _sdcard_disable(sdcard);
@@ -257 +328 @@
 }
 
-unsigned int sdcard_dev_get_capacity(struct sdcard_dev * sdcard)
-{
-        return sdcard->capacity;
-}
-
 int sdcard_dev_set_blocklen(struct sdcard_dev * sdcard, unsigned int len)
 {
@@ -268 +334 @@
     register int i;
 
+    if (len != 512)
+        return 1;
+
+    if (sdcard->sdhc) {
+        sdcard->block_length = 1;
+        return 0;
+    }
+
     for (i = 0; i < 4; i++)
         args[i] = (len >> (32 - (i+1)*8)) & 0xFF;