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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Rockchip Electronics
*
* 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 <usb/usb.h>
#include "generic_hub.h"
#include "dwc2_private.h"
#include "dwc2.h"
static int
dwc2_rh_port_status_changed(usbdev_t *const dev, const int port)
{
hprt_t hprt;
int changed;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
changed = hprt.prtconndet;
/* Clear connect detect flag */
if (changed) {
hprt.d32 &= HPRT_W1C_MASK;
hprt.prtconndet = 1;
writel(hprt.d32, dwc2->hprt0);
}
return changed;
}
static int
dwc2_rh_port_connected(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
return hprt.prtconnsts;
}
static int
dwc2_rh_port_in_reset(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
return hprt.prtrst;
}
static int
dwc2_rh_port_enabled(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
return hprt.prtena;
}
static usb_speed
dwc2_rh_port_speed(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
if (hprt.prtena) {
switch (hprt.prtspd) {
case PRTSPD_HIGH:
return HIGH_SPEED;
case PRTSPD_FULL:
return FULL_SPEED;
case PRTSPD_LOW:
return LOW_SPEED;
}
}
return -1;
}
static int
dwc2_rh_reset_port(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
hprt.d32 &= HPRT_W1C_MASK;
hprt.prtrst = 1;
writel(hprt.d32, dwc2->hprt0);
/* Wait a bit while reset is active. */
mdelay(50);
/* Deassert reset. */
hprt.prtrst = 0;
writel(hprt.d32, dwc2->hprt0);
/*
* If reset and speed enum success the DWC2 core will set enable bit
* after port reset bit is deasserted
*/
mdelay(1);
hprt.d32 = readl(dwc2->hprt0);
usb_debug("%s reset port ok, hprt = 0x%08x\n", __func__, hprt.d32);
if (!hprt.prtena) {
usb_debug("%s enable port fail! hprt = 0x%08x\n",
__func__, hprt.d32);
return -1;
}
return 0;
}
static int
dwc2_rh_enable_port(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
/* Power on the port */
hprt.d32 = readl(dwc2->hprt0);
hprt.d32 &= HPRT_W1C_MASK;
hprt.prtpwr = 1;
writel(hprt.d32, dwc2->hprt0);
return 0;
}
static int
dwc2_rh_disable_port(usbdev_t *const dev, const int port)
{
hprt_t hprt;
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
hprt.d32 = readl(dwc2->hprt0);
hprt.d32 &= HPRT_W1C_MASK;
/* Disable the port*/
hprt.prtena = 1;
/* Power off the port */
hprt.prtpwr = 0;
writel(hprt.d32, dwc2->hprt0);
return 0;
}
static const generic_hub_ops_t dwc2_rh_ops = {
.hub_status_changed = NULL,
.port_status_changed = dwc2_rh_port_status_changed,
.port_connected = dwc2_rh_port_connected,
.port_in_reset = dwc2_rh_port_in_reset,
.port_enabled = dwc2_rh_port_enabled,
.port_speed = dwc2_rh_port_speed,
.enable_port = dwc2_rh_enable_port,
.disable_port = dwc2_rh_disable_port,
.start_port_reset = NULL,
.reset_port = dwc2_rh_reset_port,
};
void
dwc2_rh_init(usbdev_t *dev)
{
dwc_ctrl_t *const dwc2 = DWC2_INST(dev->controller);
/* we can set them here because a root hub _really_ shouldn't
appear elsewhere */
dev->address = 0;
dev->hub = -1;
dev->port = -1;
generic_hub_init(dev, 1, &dwc2_rh_ops);
usb_debug("dwc2_rh_init HPRT 0x%08x p = %p\n ",
readl(dwc2->hprt0), dwc2->hprt0);
usb_debug("DWC2: root hub init done\n");
}
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