add firmware/driver/sd.c which contains common code between SD drivers

ingenic SD driver needs more cleanup so it still doesn't use the common code
correct a comment in hotswap.c: card_extract_bits assume most significant word of register first (so, use this order)
fix debug menu which used MMC specific commands / bits positions in csd/cid
move the default block size of 512 into sd.h
move the mantissa & exponent table into a single file (sd.c) to reduce binsize. we don't need to export it anymore anyway

TODO : ingenic cleanup (will happen soon so building sd.c is not conditional)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21601 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 29 insertions, 110 deletions

diff --git a/firmware/target/arm/as3525/ata_sd_as3525.c b/firmware/target/arm/as3525/ata_sd_as3525.c
index c0fad722b6..74bdb90ed0 100644
--- a/firmware/target/arm/as3525/ata_sd_as3525.c
+++ b/firmware/target/arm/as3525/ata_sd_as3525.c
@@ -94,9 +94,7 @@ static const int pl180_base[NUM_VOLUMES] = {
 static int sd_select_bank(signed char bank);
 static int sd_init_card(const int drive);
 static void init_pl180_controller(const int drive);
-/* TODO : BLOCK_SIZE != SECTOR_SIZE ? */
-#define BLOCK_SIZE      512
-#define SECTOR_SIZE     512
+#define SECTOR_SIZE     512 /* XXX: different sector sizes ? */
 #define BLOCKS_PER_BANK 0x7a7800
 
 static tCardInfo card_info[NUM_VOLUMES];
@@ -241,12 +239,11 @@ static bool send_cmd(const int drive, const int cmd, const int arg,
 
 static int sd_init_card(const int drive)
 {
-    unsigned int  c_size;
-    unsigned long c_mult;
     unsigned long response;
     int max_tries = 100; /* max acmd41 attemps */
     bool sdhc;
-    unsigned char temp;
+    unsigned long temp_reg[4];
+    int i;
 
     if(!send_cmd(drive, SD_GO_IDLE_STATE, 0, MCI_NO_FLAGS, NULL))
         return -1;
@@ -284,17 +281,11 @@ static int sd_init_card(const int drive)
 
     /* send CID */
     if(!send_cmd(drive, SD_ALL_SEND_CID, 0, MCI_RESP|MCI_LONG_RESP|MCI_ARG,
-                            card_info[drive].cid))
+                            temp_reg))
         return -5;
 
-    /* ascii chars here */
-    card_info[drive].cid[0] = htobe32(card_info[drive].cid[0]);
-    card_info[drive].cid[1] = htobe32(card_info[drive].cid[1]);
-
-    /* adjust year<=>month, 1997 <=> 2000 */
-    temp = *((char*)card_info[drive].cid+13);
-    *((char*)card_info[drive].cid+13) =
-        (unsigned char)((temp >> 4) | (temp << 4)) + 3;
+    for(i=0; i<4; i++)
+        card_info[drive].cid[3-i] = temp_reg[i];
 
     /* send RCA */
     if(!send_cmd(drive, SD_SEND_RELATIVE_ADDR, 0, MCI_RESP|MCI_ARG,
@@ -303,29 +294,13 @@ static int sd_init_card(const int drive)
 
     /* send CSD */
     if(!send_cmd(drive, SD_SEND_CSD, card_info[drive].rca,
-                 MCI_RESP|MCI_LONG_RESP|MCI_ARG, card_info[drive].csd))
+                 MCI_RESP|MCI_LONG_RESP|MCI_ARG, temp_reg))
         return -7;
 
-    /* These calculations come from the Sandisk SD card product manual */
-    if( (card_info[drive].csd[3]>>30) == 0)
-    {
-        int max_read_bl_len;
-        /* CSD version 1.0 */
-        c_size = ((card_info[drive].csd[2] & 0x3ff) << 2) + (card_info[drive].csd[1]>>30) + 1;
-        c_mult = 4 << ((card_info[drive].csd[1] >> 15) & 7);
-        max_read_bl_len = 1 << ((card_info[drive].csd[2] >> 16) & 15);
-        card_info[drive].blocksize = BLOCK_SIZE;     /* Always use 512 byte blocks */
-        card_info[drive].numblocks = c_size * c_mult * (max_read_bl_len/512);
-    }
-#ifdef HAVE_MULTIVOLUME
-    else if( (card_info[drive].csd[3]>>30) == 1)
-    {
-        /* CSD version 2.0 */
-        c_size = ((card_info[drive].csd[2] & 0x3f) << 16) + (card_info[drive].csd[1]>>16) + 1;
-        card_info[drive].blocksize = BLOCK_SIZE;     /* Always use 512 byte blocks */
-        card_info[drive].numblocks = c_size << 10;
-    }
-#endif
+    for(i=0; i<4; i++)
+        card_info[drive].csd[3-i] = temp_reg[i];
+
+    sd_parse_csd(&card_info[drive]);
 
     if(!send_cmd(drive, SD_SELECT_CARD, card_info[drive].rca, MCI_ARG, NULL))
         return -9;
@@ -723,7 +698,7 @@ static int sd_transfer_sectors(IF_MV2(int drive,) unsigned long start,
 
         /* Set bank_start to the correct unit (blocks or bytes) */
         if(!(card_info[drive].ocr & (1<<30)))   /* not SDHC */
-            bank_start *= BLOCK_SIZE;
+            bank_start *= SD_BLOCK_SIZE;
 
         if(!send_cmd(drive, cmd, bank_start, MCI_ARG, NULL))
         {
@@ -877,22 +852,7 @@ void sd_enable(bool on)
 
 tCardInfo *card_get_info_target(int card_no)
 {
-    unsigned char temp;
-    tCardInfo *card = &card_info[card_no];
-
-    temp = card->csd[3];
-    card->speed = sd_mantissa[temp & 7] * sd_exponent[(temp >> 3) & 0xf];
-
-    temp = card->csd[3] >> 8;
-    card->nsac = 100 * temp;
-
-    temp = (card->csd[3] >> 16) & 0x7f;    /* bit 7 reserved */
-    card->taac = sd_mantissa[temp >> 3] * sd_exponent[temp & 7];
-
-    temp = (card->csd[0] >> 26) & 7;
-    card->r2w_factor = temp;
-
-    return card;
+    return &card_info[card_no];
 }
 
 bool card_detect_target(void)
diff --git a/firmware/target/arm/ata-sd-pp.c b/firmware/target/arm/ata-sd-pp.c
index 8f30195791..df13a119f8 100644
--- a/firmware/target/arm/ata-sd-pp.c
+++ b/firmware/target/arm/ata-sd-pp.c
@@ -36,7 +36,6 @@
 #include "sd.h"
 #include "storage.h"
 
-#define BLOCK_SIZE      512
 #define SECTOR_SIZE     512
 #define BLOCKS_PER_BANK 0x7a7800
 
@@ -552,7 +551,7 @@ static int sd_select_bank(unsigned char bank)
 
     /* Write the card data */
     write_buf = card_data;
-    for (i = 0; i < BLOCK_SIZE/2; i += FIFO_LEN)
+    for (i = 0; i < SD_BLOCK_SIZE/2; i += FIFO_LEN)
     {
         /* Wait for the FIFO to empty */
         if (sd_poll_status(STAT_XMIT_FIFO_EMPTY, 10000))
@@ -652,10 +651,9 @@ static void sd_init_device(int card_no)
     unsigned long response = 0;
 #endif
     unsigned int  i;
-    unsigned int  c_size;
-    unsigned long c_mult;
     unsigned char carddata[512];
     unsigned char *dataptr;
+    unsigned long temp_reg[4];
     int ret;
 
 /* Enable and initialise controller */
@@ -733,38 +731,25 @@ static void sd_init_device(int card_no)
         }
     }
 
-    ret = sd_command(SD_ALL_SEND_CID, 0, currcard->cid, CMDAT_RES_TYPE2);
+    ret = sd_command(SD_ALL_SEND_CID, 0, temp_reg, CMDAT_RES_TYPE2);
     if (ret < 0)
         goto card_init_error;
 
+    for(i=0; i<4; i++)
+        currcard->cid[i] = temp_reg[3-i];
+
     ret = sd_command(SD_SEND_RELATIVE_ADDR, 0, &currcard->rca, CMDAT_RES_TYPE1);
     if (ret < 0)
         goto card_init_error;
 
-    ret = sd_command(SD_SEND_CSD, currcard->rca, currcard->csd, CMDAT_RES_TYPE2);
+    ret = sd_command(SD_SEND_CSD, currcard->rca, temp_reg, CMDAT_RES_TYPE2);
     if (ret < 0)
         goto card_init_error;
 
-    /* These calculations come from the Sandisk SD card product manual */
-    if( (currcard->csd[3]>>30) == 0)
-    {
-        int max_read_bl_len;
-        /* CSD version 1.0 */
-        c_size = ((currcard->csd[2] & 0x3ff) << 2) + (currcard->csd[1]>>30) + 1;
-        c_mult = 4 << ((currcard->csd[1] >> 15) & 7);
-        max_read_bl_len = 1 << ((currcard->csd[2] >> 16) & 15);
-        currcard->blocksize = BLOCK_SIZE;     /* Always use 512 byte blocks */
-        currcard->numblocks = c_size * c_mult * (max_read_bl_len/512);
-    }
-#ifdef HAVE_HOTSWAP
-    else if( (currcard->csd[3]>>30) == 1)
-    {
-        /* CSD version 2.0 */
-        c_size = ((currcard->csd[2] & 0x3f) << 16) + (currcard->csd[1]>>16) + 1;
-        currcard->blocksize = BLOCK_SIZE;     /* Always use 512 byte blocks */
-        currcard->numblocks = c_size << 10;
-    }
-#endif /* HAVE_HOTSWAP */
+    for(i=0; i<4; i++)
+        currcard->csd[i] = temp_reg[3-i];
+
+    sd_parse_csd(currcard);
     
     MMC_CLKRT = 0;  /* switch to highest clock rate */
 
@@ -805,7 +790,7 @@ static void sd_init_device(int card_no)
         The first 512 bits contain the status information
         TODO: Do something useful with this! */
         dataptr = carddata;
-        for (i = 0; i < BLOCK_SIZE/2; i += FIFO_LEN)
+        for (i = 0; i < SD_BLOCK_SIZE/2; i += FIFO_LEN)
         {
             /* Wait for the FIFO to be full */
             if (sd_poll_status(STAT_RECV_FIFO_FULL, 100000))
@@ -924,13 +909,13 @@ sd_read_retry:
     else
 #endif
     {
-        ret = sd_command(SD_READ_MULTIPLE_BLOCK, start * BLOCK_SIZE, NULL,
+        ret = sd_command(SD_READ_MULTIPLE_BLOCK, start * SD_BLOCK_SIZE, NULL,
                          0x1c00 | CMDAT_BUSY | CMDAT_DATA_EN | CMDAT_RES_TYPE1);
     }
     if (ret < 0)
         goto sd_read_error;
 
-    /* TODO: Don't assume BLOCK_SIZE == SECTOR_SIZE */
+    /* TODO: Don't assume SD_BLOCK_SIZE == SECTOR_SIZE */
 
     buf_end = (unsigned char *)inbuf + incount * currcard->blocksize;
     for (buf = inbuf; buf < buf_end;)
@@ -1042,7 +1027,7 @@ sd_write_retry:
     else
 #endif
     {
-        ret = sd_command(SD_WRITE_MULTIPLE_BLOCK, start*BLOCK_SIZE, NULL,
+        ret = sd_command(SD_WRITE_MULTIPLE_BLOCK, start*SD_BLOCK_SIZE, NULL,
                          CMDAT_WR_RD | CMDAT_DATA_EN | CMDAT_RES_TYPE1);
     }
     if (ret < 0)
@@ -1290,35 +1275,9 @@ int sd_init(void)
     return ret;
 }
 
-/* move the sd-card info to mmc struct */
 tCardInfo *card_get_info_target(int card_no)
 {
-    int i, temp;
-    static tCardInfo card;
-    static const char mantissa[] = {  /* *10 */
-        0,  10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
-    static const int exponent[] = {  /* use varies */
-      1,10,100,1000,10000,100000,1000000,10000000,100000000,1000000000 };
-
-    card.initialized  = card_info[card_no].initialized;
-    card.ocr          = card_info[card_no].ocr;
-    for(i=0; i<4; i++)  card.csd[i] = card_info[card_no].csd[3-i];
-    for(i=0; i<4; i++)  card.cid[i] = card_info[card_no].cid[3-i];
-    card.numblocks    = card_info[card_no].numblocks;
-    card.blocksize    = card_info[card_no].blocksize;
-    temp              = card_extract_bits(card.csd, 98, 3);
-    card.speed        = mantissa[card_extract_bits(card.csd, 102, 4)]
-                      * exponent[temp > 2 ? 7 : temp + 4];
-    card.nsac         = 100 * card_extract_bits(card.csd, 111, 8);
-    temp              = card_extract_bits(card.csd, 114, 3);
-    card.taac         = mantissa[card_extract_bits(card.csd, 118, 4)]
-                      * exponent[temp] / 10;
-    card.cid[0]       = htobe32(card.cid[0]); /* ascii chars here */
-    card.cid[1]       = htobe32(card.cid[1]); /* ascii chars here */
-    temp = *((char*)card.cid+13); /* adjust year<=>month, 1997 <=> 2000 */
-    *((char*)card.cid+13) = (unsigned char)((temp >> 4) | (temp << 4)) + 3;
-
-    return &card;
+    return &card_info[card_no];
 }
 
 bool card_detect_target(void)