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/*
* This code is based on:
* git://github.com/swetland/omap4boot.git
*/
/*
* Copyright (C) 2010 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <common.h>
#include <mach/omap/omap4-silicon.h>
#include <mach/omap/omap4_rom_usb.h>
#include <mach/omap/generic.h>
#include <init.h>
static struct omap4_usbboot omap4_usbboot_data;
int omap4_usbboot_open(void)
{
int (*rom_get_per_driver)(struct per_driver **io, u32 device_type);
int (*rom_get_per_device)(struct per_handle **rh);
struct per_handle *boot;
int n;
u32 base;
if (omap4_usbboot_ready())
return 0;
if (omap4_revision() >= OMAP4460_ES1_0)
base = PUBLIC_API_BASE_4460;
else
base = PUBLIC_API_BASE_4430;
rom_get_per_driver = API(base + PUBLIC_GET_DRIVER_PER_OFFSET);
rom_get_per_device = API(base + PUBLIC_GET_DEVICE_PER_OFFSET);
n = rom_get_per_device(&boot);
if (n)
return n;
if ((boot->device_type != DEVICE_USB) &&
(boot->device_type != DEVICE_USBEXT))
return 0;
memset(&omap4_usbboot_data, 0, sizeof(omap4_usbboot_data));
n = rom_get_per_driver(&omap4_usbboot_data.io, boot->device_type);
if (n)
return n;
omap4_usbboot_data.dread.status = -1;
omap4_usbboot_data.dread.xfer_mode = boot->xfer_mode;
omap4_usbboot_data.dread.options = boot->options;
omap4_usbboot_data.dread.device_type = boot->device_type;
omap4_usbboot_data.dwrite.status = -1;
omap4_usbboot_data.dwrite.xfer_mode = boot->xfer_mode;
omap4_usbboot_data.dwrite.options = boot->options;
omap4_usbboot_data.dwrite.device_type = boot->device_type;
__asm__ __volatile__ ("cpsie i\n");
omap4_usbboot_data.ready = 1;
omap4_usbboot_puts("USB communications initialized\n");
return 0;
}
int omap4_usbboot_ready(void){
return omap4_usbboot_data.ready;
}
static void rom_read_callback(struct per_handle *rh)
{
omap4_usbboot_data.dread.status = rh->status;
return;
}
void omap4_usbboot_queue_read(void *data, unsigned len)
{
int n;
omap4_usbboot_data.dread.data = data;
omap4_usbboot_data.dread.length = len;
omap4_usbboot_data.dread.status = STATUS_WAITING;
omap4_usbboot_data.dread.xfer_mode = 1;
omap4_usbboot_data.dread.callback = rom_read_callback;
n = omap4_usbboot_data.io->read(&omap4_usbboot_data.dread);
if (n)
omap4_usbboot_data.dread.status = n;
}
int omap4_usbboot_wait_read(void)
{
int ret;
while (omap4_usbboot_data.dread.status == STATUS_WAITING)
cpu_relax();
ret = omap4_usbboot_data.dread.status;
omap4_usbboot_data.dread.status = -1;
return ret;
}
int omap4_usbboot_is_read_waiting(void)
{
barrier();
return omap4_usbboot_data.dread.status == STATUS_WAITING;
}
int omap4_usbboot_is_read_ok(void)
{
barrier();
return omap4_usbboot_data.dread.status == STATUS_OKAY;
}
static void rom_write_callback(struct per_handle *rh)
{
omap4_usbboot_data.dwrite.status = rh->status;
return;
}
void omap4_usbboot_queue_write(void *data, unsigned len)
{
int n;
omap4_usbboot_data.dwrite.data = data;
omap4_usbboot_data.dwrite.length = len;
omap4_usbboot_data.dwrite.status = STATUS_WAITING;
omap4_usbboot_data.dwrite.xfer_mode = 1;
omap4_usbboot_data.dwrite.callback = rom_write_callback;
n = omap4_usbboot_data.io->write(&omap4_usbboot_data.dwrite);
if (n)
omap4_usbboot_data.dwrite.status = n;
}
int omap4_usbboot_wait_write(void)
{
int ret;
while (omap4_usbboot_data.dwrite.status == STATUS_WAITING)
cpu_relax();
ret = omap4_usbboot_data.dwrite.status;
omap4_usbboot_data.dwrite.status = -1;
return ret;
}
#define USB_MAX_IO 65536
int omap4_usbboot_read(void *data, unsigned len)
{
unsigned xfer;
unsigned char *x = data;
int n;
while (len > 0) {
xfer = (len > USB_MAX_IO) ? USB_MAX_IO : len;
omap4_usbboot_queue_read(x, xfer);
n = omap4_usbboot_wait_read();
if (n)
return n;
x += xfer;
len -= xfer;
}
return 0;
}
int omap4_usbboot_write(void *data, unsigned len)
{
omap4_usbboot_queue_write(data, len);
return omap4_usbboot_wait_write();
}
void omap4_usbboot_close(void)
{
omap4_usbboot_data.io->close(&omap4_usbboot_data.dread);
}
void omap4_usbboot_puts(const char *s)
{
u32 c;
while ((c = *s++))
omap4_usbboot_write(&c, 4);
}
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