firmware/target/coldfire/mpio/hd200/usb-hd200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id:$
   9  *
  10  * Copyright (C) 2010 Marcin Bukat
  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 <stdbool.h>
  23 #include "cpu.h"
  24 #include "system.h"
  25 #include "kernel.h"
  26 #include "usb.h"
  27
  28 void usb_init_device(void)
  29 {
  30     /* GPIO42 is USB detect input
  31      * but it also serves as MCLK2 for DAC
  32      */
  33     and_l(~(1<<4), &GPIO1_OUT);
  34     or_l((1<<4)|(1<<18), &GPIO1_ENABLE);   /* GPIO36 GPIO50 */
  35     or_l((1<<4)|(1<<5)|(1<<18), &GPIO1_FUNCTION); /* GPIO36 GPIO37 GPIO50 */
  36
  37      /* GPIO22 GPIO30*/
  38      /* GPIO31 has to be low to ATA work */
  39     or_l((1<<22)|(1<<30), &GPIO_OUT);
  40     or_l((1<<22)|(1<<30)|(1<<31), &GPIO_ENABLE);
  41     or_l((1<<22)|(1<<30)|(1<<31), &GPIO_FUNCTION);
  42 }
  43
  44 int usb_detect(void)
  45 {
  46     /* GPIO42 active low*/
  47     return (GPIO1_READ & (1<<10)) ? USB_EXTRACTED : USB_INSERTED;
  48 }
  49
  50 void usb_enable(bool on)
  51 {
  52
  53     if(on)
  54     {
  55         or_l((1<<18),&GPIO1_OUT); /* GPIO50 high */
  56
  57         and_l(~(1<<30),&GPIO_OUT);  /* GPIO30 low */
  58         /* GPIO36 low delay GPIO36 high delay */
  59         and_l(~(1<<4),&GPIO1_OUT);
  60         or_l((1<<4),&GPIO1_OUT);
  61
  62         and_l(~(1<<18),&GPIO1_OUT); /* GPIO50 low */
  63         sleep(HZ/5); /* delay 200 ms */
  64         and_l(~(1<<22),&GPIO_OUT); /* GPIO22 low */
  65     }
  66     else
  67     {
  68         /* GPIO36 low delay GPIO36 high delay */
  69         and_l(~(1<<4),&GPIO1_OUT);
  70         sleep(HZ/100);
  71         or_l((1<<4),&GPIO1_OUT);
  72         sleep(HZ/100);
  73
  74         or_l((1<<22),&GPIO_OUT);  /* GPIO22 high */
  75         or_l((1<<30),&GPIO_OUT);  /* GPIO30 high */
  76
  77         and_l(~(1<<4),&GPIO1_OUT); /* GPIO36 low */
  78
  79        while ( !(GPIO1_READ & (1<<5)) ) {}
  80        sleep(HZ);
  81     }
  82 }