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         if ((retVal = FNAME_SDCBUS(WaitCmd)(SDHCI_PS_CMD_INHIBIT|SDHCI_PS_DATA_INHIBIT, 1000, sdcUnit->sdcu_Bus)) != -1)
  34         {
  35             /* Wait for units ready status */
  36             FNAME_SDCUNIT(WaitStatus)(1000, sdcUnit);
  37         }
  38     }
  39     return retVal;
  40 }
  41
  42 ULONG FNAME_SDCUNIT(MMCChangeFrequency)(struct sdcard_Unit *sdcUnit)
  43 {
  44     UBYTE               sdcRespBuf[512];
  45     UBYTE               sdcCardType;
  46     struct TagItem      sdcChFreqTags[] =
  47     {
  48         {SDCARD_TAG_CMD,        MMC_CMD_SEND_EXT_CSD},
  49         {SDCARD_TAG_ARG,        0},
  50         {SDCARD_TAG_RSPTYPE,    MMC_RSP_R1},
  51         {SDCARD_TAG_RSP,        0},
  52         {SDCARD_TAG_DATA,       (IPTR)sdcRespBuf},
  53         {SDCARD_TAG_DATALEN,    512},
  54         {SDCARD_TAG_DATAFLAGS,  MMC_DATA_READ},
  55         {TAG_DONE,              0}
  56     };
  57
  58     D(bug("[SDCard%02ld] %s()\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  59
  60     if (sdcUnit->sdcu_Bus->sdcb_BusFlags & AF_Bus_SPI)
  61         return 0;
  62
  63     D(bug("[SDCard%02ld] %s: Querying Ext_CSD ... \n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  64     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))
  65     {
  66         D(bug("[SDCard%02ld] %s: Query Failed\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  67         return 0;
  68     }
  69     D(bug("[SDCard%02ld] %s: Query Response = %08x\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__, sdcChFreqTags[3].ti_Data));
  70
  71     sdcCardType = sdcRespBuf[0xC4] & 0xF;
  72
  73     D(bug("[SDCard%02ld] %s: CardType = %d\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__, sdcCardType));
  74
  75     if (FNAME_SDCUNIT(MMCSwitch)(EXT_CSD_HS_TIMING, 1, sdcUnit) != -1)
  76     {
  77         D(bug("[SDCard%02ld] %s: Switch failed\n", sdcUnit->sdcu_UnitNum, __PRETTY_FUNCTION__));
  78         return -1;
  79     }
  80
  81     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))
  82     {
  83         if (sdcRespBuf[0xB9])
  84         {
  85             /* MMC supports 26MHz High-Speed mode .. */
  86             sdcUnit->sdcu_Flags |= AF_Card_HighSpeed;
  87
  88             /* is 52MHz mode also supported? */
  89             if (sdcCardType & MMC_HS_52MHZ)
  90                 sdcUnit->sdcu_Flags |= AF_Card_HighSpeed52;
  91         }
  92     }
  93     return 0;
  94 }