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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2013 secunet Security Networks AG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <usb/usb.h>
#include "generic_hub.h"
/* assume that host_to_device is overwritten if necessary */
#define DR_PORT gen_bmRequestType(host_to_device, class_type, other_recp)
/* status (and status change) bits */
#define PORT_CONNECTION 0x1
#define PORT_ENABLE 0x2
#define PORT_RESET 0x10
/* feature selectors (for setting / clearing features) */
#define SEL_PORT_RESET 0x4
#define SEL_PORT_POWER 0x8
#define SEL_C_PORT_CONNECTION 0x10
static int
usb_hub_port_status_changed(usbdev_t *const dev, const int port)
{
unsigned short buf[2] = { 0, 0 };
get_status (dev, port, DR_PORT, 4, buf);
clear_feature (dev, port, SEL_C_PORT_CONNECTION, DR_PORT);
return buf[1] & PORT_CONNECTION;
}
static int
usb_hub_port_connected(usbdev_t *const dev, const int port)
{
unsigned short buf[2] = { 0, 0 };
get_status (dev, port, DR_PORT, 4, buf);
return buf[0] & PORT_CONNECTION;
}
static int
usb_hub_port_in_reset(usbdev_t *const dev, const int port)
{
unsigned short buf[2] = { 0, 0 };
get_status (dev, port, DR_PORT, 4, buf);
return buf[0] & PORT_RESET;
}
static int
usb_hub_port_enabled(usbdev_t *const dev, const int port)
{
unsigned short buf[2] = { 0, 0 };
get_status (dev, port, DR_PORT, 4, buf);
return (buf[0] & PORT_ENABLE) != 0;
}
static int
usb_hub_port_speed(usbdev_t *const dev, const int port)
{
unsigned short buf[2] = { 0, 0 };
get_status (dev, port, DR_PORT, 4, buf);
if (buf[0] & PORT_ENABLE) {
/* bit 10 9
* 0 0 full speed
* 0 1 low speed
* 1 0 high speed
*/
return (buf[0] >> 9) & 0x3;
} else {
return -1;
}
}
static int
usb_hub_enable_port(usbdev_t *const dev, const int port)
{
set_feature(dev, port, SEL_PORT_POWER, DR_PORT);
return 0;
}
static int
usb_hub_start_port_reset(usbdev_t *const dev, const int port)
{
set_feature (dev, port, SEL_PORT_RESET, DR_PORT);
return 0;
}
static const generic_hub_ops_t usb_hub_ops = {
.hub_status_changed = NULL,
.port_status_changed = usb_hub_port_status_changed,
.port_connected = usb_hub_port_connected,
.port_in_reset = usb_hub_port_in_reset,
.port_enabled = usb_hub_port_enabled,
.port_speed = usb_hub_port_speed,
.enable_port = usb_hub_enable_port,
.disable_port = NULL,
.start_port_reset = usb_hub_start_port_reset,
.reset_port = generic_hub_resetport,
};
void
usb_hub_init(usbdev_t *const dev)
{
hub_descriptor_t *const descriptor = (hub_descriptor_t *)
get_descriptor(
dev,
gen_bmRequestType(device_to_host, class_type, dev_recp),
0x29, 0, 0);
if (!descriptor) {
usb_debug("usbhub: ERROR: Failed to fetch hub descriptor\n");
return;
}
const int num_ports = descriptor->bNbrPorts;
free(descriptor);
generic_hub_init(dev, num_ports, &usb_hub_ops);
}
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