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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 AMD
* Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
*
* 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#include <string.h>
#include <console/console.h>
#include <usbdebug.h>
#include <device/pci.h>
#include <pc80/mc146818rtc.h>
static struct ehci_debug_info dbg_info;
static struct device_operations *ehci_drv_ops;
static struct device_operations ehci_dbg_ops;
static void usbdebug_re_enable(unsigned ehci_base)
{
unsigned diff;
if (!dbg_info.ehci_debug)
return;
diff = (unsigned)dbg_info.ehci_caps - ehci_base;
dbg_info.ehci_regs -= diff;
dbg_info.ehci_debug -= diff;
dbg_info.ehci_caps = (void*)ehci_base;
dbg_info.status |= DBGP_EP_ENABLED;
}
static void usbdebug_disable(void)
{
dbg_info.status &= ~DBGP_EP_ENABLED;
}
static void pci_ehci_set_resources(struct device *dev)
{
struct resource *res;
printk(BIOS_DEBUG, "%s EHCI Debug Port hook triggered\n", dev_path(dev));
usbdebug_disable();
if (ehci_drv_ops->set_resources)
ehci_drv_ops->set_resources(dev);
res = find_resource(dev, EHCI_BAR_INDEX);
if (!res)
return;
usbdebug_re_enable((u32)res->base);
report_resource_stored(dev, res, "");
printk(BIOS_DEBUG, "%s EHCI Debug Port relocated\n", dev_path(dev));
}
void pci_ehci_read_resources(struct device *dev)
{
if (!ehci_drv_ops) {
memcpy(&ehci_dbg_ops, dev->ops, sizeof(ehci_dbg_ops));
ehci_drv_ops = dev->ops;
ehci_dbg_ops.set_resources = pci_ehci_set_resources;
dev->ops = &ehci_dbg_ops;
printk(BIOS_DEBUG, "%s EHCI BAR hook registered\n", dev_path(dev));
} else {
printk(BIOS_DEBUG, "More than one caller of %s from %s\n", __func__, dev_path(dev));
}
pci_dev_read_resources(dev);
}
static void dbgp_init(void)
{
#if !CONFIG_EARLY_CONSOLE
enable_usbdebug(CONFIG_USBDEBUG_DEFAULT_PORT);
#endif
usbdebug_init(CONFIG_EHCI_BAR, CONFIG_EHCI_DEBUG_OFFSET, &dbg_info);
}
static void dbgp_tx_byte(unsigned char data)
{
usbdebug_tx_byte(&dbg_info, data);
}
static unsigned char dbgp_rx_byte(void)
{
unsigned char data = 0xff;
if (dbgp_ep_is_active(&dbg_info))
dbgp_bulk_read_x(&dbg_info, &data, 1);
return data;
}
static void dbgp_tx_flush(void)
{
usbdebug_tx_flush(&dbg_info);
}
static int dbgp_tst_byte(void)
{
return dbgp_ep_is_active(&dbgp_info);
}
static const struct console_driver usbdebug_direct_console __console = {
.init = dbgp_init,
.tx_byte = dbgp_tx_byte,
.tx_flush = dbgp_tx_flush,
.rx_byte = dbgp_rx_byte,
.tst_byte = dbgp_tst_byte,
};
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