1 files changed, 94 insertions, 0 deletions

diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/usb-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/usb-meg-fx.c
new file mode 100644
index 0000000000..3aed8c3256
--- /dev/null
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/usb-meg-fx.c
@@ -0,0 +1,94 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * 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 "ata.h"
+
+#define USB_RST_ASSERT   GPBDAT &= ~(1 << 4)
+#define USB_RST_DEASSERT GPBDAT |=  (1 << 4)
+
+#define USB_VPLUS_PWR_ASSERT    GPBDAT |=  (1 << 6)
+#define USB_VPLUS_PWR_DEASSERT  GPBDAT &= ~(1 << 6)
+
+#define USB_UNIT_IS_PRESENT  !(GPFDAT & 0x01)
+#define USB_CRADLE_IS_PRESENT  ((GPFDAT &0x02)&&!(GPGDAT&1<<14))
+
+#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 */
+inline bool usb_detect(void)
+{
+    return USB_UNIT_IS_PRESENT | USB_CRADLE_IS_PRESENT;
+}
+
+void usb_init_device(void)
+{
+    /* Input is the default configuration, only pullups need to be disabled */
+    GPFUP|=0x02;
+
+    USB_VPLUS_PWR_ASSERT;
+    GPBCON=( GPBCON&~(1<<13) ) | (1 << 12);
+
+    sleep(HZ/20);
+
+    /* Reset the usb port */
+    USB_RST_ASSERT;
+    GPBCON = (GPBCON & ~0x200) | 0x100; /* Make sure reset line is an output */
+
+    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_VPLUS_PWR_DEASSERT;
+
+    sleep(HZ/25);
+}
+
+void usb_enable(bool on)
+{
+    if (on)
+    {
+        USB_VPLUS_PWR_ASSERT;
+        if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_ENABLE;
+    }
+    else
+    {
+        if(USB_CRADLE_IS_PRESENT) USB_CRADLE_BUS_DISABLE;
+        USB_VPLUS_PWR_DEASSERT;
+    }
+
+    /* Make sure USB_CRADLE_BUS pin is an output */
+    GPHCON=( GPHCON&~(1<<17) ) | (1<<16); /* Make the pin an output */
+    GPHUP|=1<<8;  /* Disable pullup in SOC as we are now driving */
+
+    sleep(HZ/20); // > 50ms for detecting the enable state change
+}