| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2007 by Jens Arnold |
| * |
| * 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 "adc.h" |
| #include "ata_mmc.h" |
| #include "cpu.h" |
| #include "hwcompat.h" |
| #include "system.h" |
| #include "usb.h" |
| |
| int usb_detect(void) |
| { |
| return (adc_read(ADC_USB_POWER) <= 512) ? USB_INSERTED : USB_EXTRACTED; |
| } |
| |
| void usb_enable(bool on) |
| { |
| if (on) |
| { |
| mmc_enable_int_flash_clock(!mmc_detect()); |
| |
| if (!(HW_MASK & MMC_CLOCK_POLARITY)) |
| and_b(~0x20, &PBDRH); /* old circuit needs SCK1 = low while on USB */ |
| or_b(0x20, &PADRL); /* enable USB */ |
| and_b(~0x08, &PADRL); /* assert card detect */ |
| } |
| else |
| { |
| if (!(HW_MASK & MMC_CLOCK_POLARITY)) |
| or_b(0x20, &PBDRH); /* reset SCK1 = high for old circuit */ |
| and_b(~0x20, &PADRL); /* disable USB */ |
| or_b(0x08, &PADRL); /* deassert card detect */ |
| } |
| } |
| |
| void usb_init_device(void) |
| { |
| PACR2 &= ~0x04C0; /* use PA3 (card detect) and PA5 (USB enabled) as GPIO */ |
| and_b(~0x20, &PADRL); /* disable USB */ |
| or_b(0x08, &PADRL); /* deassert card detect */ |
| or_b(0x28, &PAIORL); /* output for USB enable and card detect */ |
| } |