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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.
*/
//#define USB_DEBUG
#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
/* request type (USB 3.0 hubs only) */
#define SET_HUB_DEPTH 12
static int
usb_hub_port_status_changed(usbdev_t *const dev, const int port)
{
unsigned short buf[2];
int ret = get_status (dev, port, DR_PORT, sizeof(buf), buf);
if (ret >= 0) {
ret = buf[1] & PORT_CONNECTION;
if (ret)
clear_feature (dev, port, SEL_C_PORT_CONNECTION,
DR_PORT);
}
return ret;
}
static int
usb_hub_port_connected(usbdev_t *const dev, const int port)
{
unsigned short buf[2];
int ret = get_status (dev, port, DR_PORT, sizeof(buf), buf);
if (ret >= 0)
ret = buf[0] & PORT_CONNECTION;
return ret;
}
static int
usb_hub_port_in_reset(usbdev_t *const dev, const int port)
{
unsigned short buf[2];
int ret = get_status (dev, port, DR_PORT, sizeof(buf), buf);
if (ret >= 0)
ret = buf[0] & PORT_RESET;
return ret;
}
static int
usb_hub_port_enabled(usbdev_t *const dev, const int port)
{
unsigned short buf[2];
int ret = get_status (dev, port, DR_PORT, sizeof(buf), buf);
if (ret >= 0)
ret = buf[0] & PORT_ENABLE;
return ret;
}
static usb_speed
usb_hub_port_speed(usbdev_t *const dev, const int port)
{
unsigned short buf[2];
int ret = get_status (dev, port, DR_PORT, sizeof(buf), buf);
if (ret >= 0 && (buf[0] & PORT_ENABLE)) {
/* SuperSpeed hubs can only have SuperSpeed devices. */
if (dev->speed == SUPER_SPEED)
return SUPER_SPEED;
/*[bit] 10 9 (USB 2.0 port status word)
* 0 0 full speed
* 0 1 low speed
* 1 0 high speed
* 1 1 invalid
*/
ret = (buf[0] >> 9) & 0x3;
if (ret != 0x3)
return ret;
}
return -1;
}
static int
usb_hub_enable_port(usbdev_t *const dev, const int port)
{
return set_feature(dev, port, SEL_PORT_POWER, DR_PORT);
}
static int
usb_hub_start_port_reset(usbdev_t *const dev, const int port)
{
return set_feature (dev, port, SEL_PORT_RESET, DR_PORT);
}
static void usb_hub_set_hub_depth(usbdev_t *const dev)
{
dev_req_t dr = {
.bmRequestType = gen_bmRequestType(host_to_device,
class_type, dev_recp),
.bRequest = SET_HUB_DEPTH,
.wValue = 0,
.wIndex = 0,
.wLength = 0,
};
usbdev_t *parent = dev;
while (parent->hub > 0) {
parent = dev->controller->devices[parent->hub];
dr.wValue++;
}
int ret = dev->controller->control(dev, OUT, sizeof(dr), &dr, 0, NULL);
if (ret < 0)
usb_debug("Failed SET_HUB_DEPTH(%d) on hub %d: %d\n",
dr.wValue, dev->address, ret);
}
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,
};
/* Clear CSC if set and enumerate port if it's connected regardless of change
bits. Some broken hubs don't set CSC if already connected during reset. */
static void
usb_hub_port_initialize(usbdev_t *const dev, const int port)
{
unsigned short buf[2];
int ret = get_status(dev, port, DR_PORT, sizeof(buf), buf);
if (ret < 0)
return;
if (buf[1] & PORT_CONNECTION)
clear_feature(dev, port, SEL_C_PORT_CONNECTION, DR_PORT);
if (buf[0] & PORT_CONNECTION)
generic_hub_scanport(dev, port);
}
void
usb_hub_init(usbdev_t *const dev)
{
int type = dev->speed == SUPER_SPEED ? 0x2a : 0x29; /* similar enough */
hub_descriptor_t desc; /* won't fit the whole thing, we don't care */
if (get_descriptor(dev, gen_bmRequestType(device_to_host, class_type,
dev_recp), type, 0, &desc, sizeof(desc)) != sizeof(desc)) {
usb_debug("get_descriptor(HUB) failed\n");
usb_detach_device(dev->controller, dev->address);
return;
}
if (dev->speed == SUPER_SPEED)
usb_hub_set_hub_depth(dev);
if (generic_hub_init(dev, desc.bNbrPorts, &usb_hub_ops) < 0)
return;
int port;
for (port = 1; port <= GEN_HUB(dev)->num_ports; ++port)
usb_hub_port_initialize(dev, port);
}
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