rom/devs/sdcard/sdcard_mmcunit.c

   1 /*
   2     Copyright © 2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define DEBUG 0
   7 #include <aros/debug.h>
   8
   9 #include <hardware/mmc.h>
  10 #include <hardware/sdhc.h>
  11
  12 #include "sdcard_base.h"
  13 #include "sdcard_unit.h"
  14
  15 ULONG FNAME_SDCUNIT(MMCSwitch)(UBYTE offset, UBYTE value, struct sdcard_Unit *sdcUnit)
  16 {
  17     struct TagItem sdcSwitchTags[] =
  18     {
  19         {SDCARD_TAG_CMD,        MMC_CMD_SWITCH},
  20         {SDCARD_TAG_ARG,        0},
  21         {SDCARD_TAG_RSPTYPE,    MMC_RSP_R1b},
  22         {SDCARD_TAG_RSP,        0},
  23         {TAG_DONE,              0}
  24     };
  25     ULONG retVal;
  26
  27     D(bug("[SDCard%02ld] %s()\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  28
  29     sdcSwitchTags[1].ti_Data = (MMC_SWITCH_WRITE_BYTE << 24) | (offset << 16) | (value << 8);
  30
  31     if ((retVal = FNAME_SDCBUS(SendCmd)(sdcSwitchTags, sdcUnit->sdcu_Bus)) != -1)
  32     {
  33         /* Wait for units ready status */
  34         FNAME_SDCUNIT(WaitStatus)(1000, sdcUnit);
  35     }
  36     return retVal;
  37 }
  38
  39 ULONG FNAME_SDCUNIT(MMCChangeFrequency)(struct sdcard_Unit *sdcUnit)
  40 {
  41     UBYTE               sdcRespBuf[512];
  42     UBYTE               sdcCardType;
  43     struct TagItem      sdcChFreqTags[] =
  44     {
  45         {SDCARD_TAG_CMD,        MMC_CMD_SEND_EXT_CSD},
  46         {SDCARD_TAG_ARG,        0},
  47         {SDCARD_TAG_RSPTYPE,    MMC_RSP_R1},
  48         {SDCARD_TAG_RSP,        0},
  49         {SDCARD_TAG_DATA,       (IPTR)sdcRespBuf},
  50         {SDCARD_TAG_DATALEN,    512},
  51         {SDCARD_TAG_DATAFLAGS,  MMC_DATA_READ},
  52         {TAG_DONE,              0}
  53     };
  54
  55     D(bug("[SDCard%02ld] %s()\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  56
  57     if (sdcUnit->sdcu_Bus->sdcb_BusFlags & AF_Bus_SPI)
  58         return 0;
  59
  60     D(bug("[SDCard%02ld] %s: Querying Ext_CSD ... \n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  61     if ((FNAME_SDCBUS(SendCmd)(sdcChFreqTags, sdcUnit->sdcu_Bus) == -1) || (FNAME_SDCBUS(WaitCmd)(SDHCI_PS_CMD_INHIBIT|SDHCI_PS_DATA_INHIBIT, 1000, sdcUnit->sdcu_Bus) == -1))
  62     {
  63         D(bug("[SDCard%02ld] %s: Query Failed\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  64         return 0;
  65     }
  66     D(bug("[SDCard%02ld] %s: Query Response = %08x\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__, sdcChFreqTags[3].ti_Data));
  67
  68     sdcCardType = sdcRespBuf[0xC4] & 0xF;
  69
  70     D(bug("[SDCard%02ld] %s: CardType = %d\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__, sdcCardType));
  71
  72     if (FNAME_SDCUNIT(MMCSwitch)(EXT_CSD_HS_TIMING, 1, sdcUnit) != -1)
  73     {
  74         D(bug("[SDCard%02ld] %s: Switch failed\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  75         return -1;
  76     }
  77
  78     if ((FNAME_SDCBUS(SendCmd)(sdcChFreqTags, sdcUnit->sdcu_Bus) != -1) || (FNAME_SDCBUS(WaitCmd)(SDHCI_PS_CMD_INHIBIT|SDHCI_PS_DATA_INHIBIT, 1000, sdcUnit->sdcu_Bus) != -1))
  79     {
  80         if (sdcRespBuf[0xB9])
  81         {
  82             /* MMC supports 26MHz High-Speed mode .. */
  83             sdcUnit->sdcu_Flags |= AF_Card_HighSpeed;
  84
  85             /* is 52MHz mode also supported? */
  86             if (sdcCardType & MMC_HS_52MHZ)
  87                 sdcUnit->sdcu_Flags |= AF_Card_HighSpeed52;
  88         }
  89     }
  90     return 0;
  91 }