| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2006 by Linus Nielsen Feltzing |
| * |
| * 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 "cpu.h" |
| #include "system.h" |
| #include "kernel.h" |
| #include "ata.h" |
| #include "usb.h" |
| |
| #define USB_RST_ASSERT GPBDAT &= ~(1 << 4) |
| #define USB_RST_DEASSERT GPBDAT |= (1 << 4) |
| |
| #define USB_VBUS_PWR_ASSERT GPBDAT |= (1 << 6) |
| #define USB_VBUS_PWR_DEASSERT GPBDAT &= ~(1 << 6) |
| |
| #define USB_UNIT_IS_PRESENT !(GPFDAT & 0x01) |
| #define USB_CRADLE_IS_PRESENT ((GPFDAT &0x02)&&((GPGDAT&(3<<13))==(1<<13))) |
| |
| #define USB_CRADLE_BUS_ENABLE GPHDAT |= (1 << 8) |
| #define USB_CRADLE_BUS_DISABLE GPHDAT &= ~(1 << 8) |
| |
| /* The usb detect is one pin to the cpu active low */ |
| int usb_detect(void) |
| { |
| if (USB_UNIT_IS_PRESENT | USB_CRADLE_IS_PRESENT) |
| return USB_INSERTED; |
| else |
| return USB_EXTRACTED; |
| } |
| |
| void usb_init_device(void) |
| { |
| /* Setup USB Cradle Power control (output, disabled, no pullup) */ |
| GPHCON=( GPHCON&~(1<<17) ) | (1<<16); |
| GPHUP|=1<<8; |
| USB_CRADLE_BUS_DISABLE; |
| |
| /* Setup VBUS PWR (output, asserted, no pullup) */ |
| GPBCON=( GPBCON&~(1<<13) ) | (1 << 12); |
| GPBUP|=1<<6; |
| USB_VBUS_PWR_ASSERT; |
| |
| sleep(HZ/20); |
| |
| /* Setup USB reset (output, asserted, no pullup) */ |
| GPBCON = (GPBCON & ~0x200) | 0x100; /* Make sure reset line is an output */ |
| GPBUP|=1<<4; |
| USB_RST_ASSERT; |
| |
| sleep(HZ/25); |
| USB_RST_DEASSERT; |
| |
| /* needed to complete the reset */ |
| ata_enable(false); |
| |
| sleep(HZ/15); /* 66ms */ |
| |
| ata_enable(true); |
| |
| sleep(HZ/25); |
| |
| /* leave chip in low power mode */ |
| USB_VBUS_PWR_DEASSERT; |
| |
| sleep(HZ/25); |
| } |
| |
| void usb_enable(bool on) |
| { |
| if (on) |
| { |
| USB_VBUS_PWR_ASSERT; |
| if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_ENABLE; |
| } |
| else |
| { |
| if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_DISABLE; |
| USB_VBUS_PWR_DEASSERT; |
| } |
| |
| sleep(HZ/20); // > 50ms for detecting the enable state change |
| } |