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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 coresystems GmbH
*
* 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>
// assume that host_to_device is overwritten if necessary
#define DR_PORT gen_bmRequestType(host_to_device, class_type, other_recp)
#define PORT_RESET 0x4
#define PORT_POWER 0x8
typedef struct {
int num_ports;
int *ports;
hub_descriptor_t *descriptor;
} usbhub_inst_t;
#define HUB_INST(dev) ((usbhub_inst_t*)(dev)->data)
static void
usb_hub_destroy (usbdev_t *dev)
{
free (HUB_INST (dev)->ports);
free (HUB_INST (dev)->descriptor);
free (HUB_INST (dev));
}
static void
usb_hub_scanport (usbdev_t *dev, int port)
{
int newdev;
unsigned short buf[2];
usbdev_t *newdev_t;
get_status (dev, port, DR_PORT, 4, buf);
int portstatus = ((buf[0] & 1) == 0);
int datastatus = (HUB_INST (dev)->ports[port] == -1);
if (portstatus == datastatus)
return; // no change - FIXME: read right fields for that test
if (!datastatus) {
int devno = HUB_INST (dev)->ports[port];
if (devno == -1)
fatal ("FATAL: illegal devno!\n");
dev->controller->devices[devno].destroy (&dev->controller->
devices[devno]);
init_device_entry (dev->controller, devno);
HUB_INST (dev)->ports[port] = -1;
return;
}
set_feature (dev, port, PORT_RESET, DR_PORT);
mdelay (20);
get_status (dev, port, DR_PORT, 4, buf);
int lowspeed = (buf[0] >> 9) & 1;
newdev = set_address (dev->controller, lowspeed);
if (newdev == -1)
return;
newdev_t = &dev->controller->devices[newdev];
HUB_INST (dev)->ports[port] = newdev;
newdev_t->address = newdev;
newdev_t->hub = dev->address;
newdev_t->port = port;
// determine responsible driver
newdev_t->init (newdev_t);
}
static int
usb_hub_report_port_changes (usbdev_t *dev)
{
int port;
unsigned short buf[2];
for (port = 1; port <= HUB_INST (dev)->num_ports; port++) {
get_status (dev, port, DR_PORT, 4, buf);
// FIXME: proper change detection
int portstatus = ((buf[0] & 1) == 0);
int datastatus = (HUB_INST (dev)->ports[port] == -1);
if (portstatus != datastatus)
return port;
}
// no change
return -1;
}
static void
usb_hub_enable_port (usbdev_t *dev, int port)
{
set_feature (dev, port, PORT_POWER, DR_PORT);
mdelay (20);
}
#if 0
static void
usb_hub_disable_port (usbdev_t *dev, int port)
{
}
#endif
static void
usb_hub_poll (usbdev_t *dev)
{
int port;
while ((port = usb_hub_report_port_changes (dev)) != -1)
usb_hub_scanport (dev, port);
}
void
usb_hub_init (usbdev_t *dev)
{
int i;
dev->destroy = usb_hub_destroy;
dev->poll = usb_hub_poll;
dev->data = malloc (sizeof (usbhub_inst_t));
HUB_INST (dev)->descriptor =
(hub_descriptor_t *) get_descriptor (dev,
gen_bmRequestType
(device_to_host,
class_type, dev_recp),
0x29, 0, 0);
HUB_INST (dev)->num_ports = HUB_INST (dev)->descriptor->bNbrPorts;
HUB_INST (dev)->ports =
malloc (sizeof (int) * (HUB_INST (dev)->num_ports + 1));
for (i = 1; i <= HUB_INST (dev)->num_ports; i++)
HUB_INST (dev)->ports[i] = -1;
for (i = 1; i <= HUB_INST (dev)->num_ports; i++)
usb_hub_enable_port (dev, i);
}
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