firmware/target/arm/imx233/sd-imx233.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2011 by Amaury Pouly
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "config.h"
  22 #include "system.h"
  23 #include "sd.h"
  24 #include "sdmmc.h"
  25 #include "ssp-imx233.h"
  26 #include "pinctrl-imx233.h"
  27 #include "button-target.h"
  28
  29 /**
  30  * This code assumes a single SD card slot
  31  */
  32
  33 #ifdef SANSA_FUZEPLUS
  34 #define SD_SSP      1
  35 #else
  36 #error You need to configure the ssp to use
  37 #endif
  38
  39 static tCardInfo card_info;
  40 static struct mutex sd_mutex;
  41
  42 static void sd_detect_callback(int ssp)
  43 {
  44     (void)ssp;
  45
  46     /* This is called only if the state was stable for 300ms - check state
  47      * and post appropriate event. */
  48     if(imx233_ssp_sdmmc_detect(SD_SSP))
  49         queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
  50     else
  51         queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0);
  52     printf("sd_detect_callback(%d)", imx233_ssp_sdmmc_detect(SD_SSP));
  53     imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback);
  54 }
  55
  56 int sd_init(void)
  57 {
  58     mutex_init(&sd_mutex);
  59
  60     imx233_ssp_start(SD_SSP);
  61     imx233_ssp_softreset(SD_SSP);
  62     imx233_ssp_set_mode(SD_SSP, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
  63     #ifdef SANSA_FUZEPLUS
  64     imx233_ssp_setup_ssp1_sd_mmc_pins(true, 4, PINCTRL_DRIVE_8mA, false);
  65     #endif
  66     imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback);
  67     /* SSPCLK @ 96MHz
  68      * gives bitrate of 96000 / 240 / 1 = 400kHz */
  69     imx233_ssp_set_timings(SD_SSP, 240, 0, 0xffff);
  70     imx233_ssp_set_bus_width(SD_SSP, 1);
  71     imx233_ssp_set_block_size(SD_SSP, 9);
  72
  73     return 0;
  74 }
  75
  76 int sd_read_sectors(IF_MD2(int drive,) unsigned long start, int count,
  77                      void* buf)
  78 {
  79     IF_MD((void) drive);
  80     (void) start;
  81     (void) count;
  82     (void) buf;
  83     return -1;
  84 }
  85
  86 int sd_write_sectors(IF_MD2(int drive,) unsigned long start, int count,
  87                      const void* buf)
  88 {
  89     IF_MD((void) drive);
  90     (void) start;
  91     (void) count;
  92     (void) buf;
  93     return -1;
  94 }
  95
  96 tCardInfo *card_get_info_target(int card_no)
  97 {
  98     (void)card_no;
  99     return NULL;
 100 }
 101
 102 int sd_num_drives(int first_drive)
 103 {
 104     (void) first_drive;
 105     return 1;
 106 }
 107
 108 bool sd_present(IF_MD(int drive))
 109 {
 110     IF_MD((void) drive);
 111     return imx233_ssp_sdmmc_detect(SD_SSP);
 112 }
 113