| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2010 Marcin Bukat |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "config.h" |
| #include <stdbool.h> |
| #include "cpu.h" |
| #include "system.h" |
| #include "kernel.h" |
| #include "usb.h" |
| |
| void usb_init_device(void) |
| { |
| /* GPIO42 is USB detect input |
| * but it also serves as MCLK2 for DAC |
| */ |
| and_l(~(1<<4), &GPIO1_OUT); /* GPIO36 low */ |
| or_l((1<<4), &GPIO1_ENABLE); /* GPIO36 */ |
| or_l((1<<4)|(1<<5), &GPIO1_FUNCTION); /* GPIO36 GPIO37 */ |
| |
| /* GPIO22 GPIO30 high */ |
| or_l((1<<22)|(1<<30), &GPIO_OUT); |
| or_l((1<<22)|(1<<30), &GPIO_ENABLE); |
| or_l((1<<22)|(1<<30), &GPIO_FUNCTION); |
| } |
| |
| int usb_detect(void) |
| { |
| /* GPIO42 active low*/ |
| return (GPIO1_READ & (1<<10)) ? USB_EXTRACTED : USB_INSERTED; |
| } |
| |
| void usb_enable(bool on) |
| { |
| /* one second timeout */ |
| unsigned char timeout = 10; |
| |
| if(on) |
| { |
| and_l(~(1<<30),&GPIO_OUT); /* GPIO30 low */ |
| and_l(~(1<<22),&GPIO_OUT); /* GPIO22 low */ |
| |
| or_l((1<<4),&GPIO1_OUT); /* GPIO36 high */ |
| |
| } |
| else |
| { |
| or_l((1<<22),&GPIO_OUT); /* GPIO22 high */ |
| or_l((1<<30),&GPIO_OUT); /* GPIO30 high */ |
| |
| and_l(~(1<<4),&GPIO1_OUT); /* GPIO36 low */ |
| |
| while ( !(GPIO1_READ & (1<<5)) && timeout--) |
| { |
| sleep(HZ/10); |
| } |
| sleep(HZ); |
| } |
| } |