151 lines
4.3 KiB
C
151 lines
4.3 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 coresystems GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <usb/usb.h>
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// assume that host_to_device is overwritten if necessary
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#define DR_PORT gen_bmRequestType(host_to_device, class_type, other_recp)
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#define PORT_RESET 0x4
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#define PORT_POWER 0x8
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typedef struct {
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int num_ports;
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int *ports;
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hub_descriptor_t *descriptor;
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} usbhub_inst_t;
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#define HUB_INST(dev) ((usbhub_inst_t*)(dev)->data)
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static void
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usb_hub_destroy (usbdev_t *dev)
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{
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free (HUB_INST (dev)->ports);
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free (HUB_INST (dev)->descriptor);
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free (HUB_INST (dev));
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}
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static void
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usb_hub_scanport (usbdev_t *dev, int port)
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{
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unsigned short buf[2];
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get_status (dev, port, DR_PORT, 4, buf);
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int portstatus = ((buf[0] & 1) == 0);
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int datastatus = (HUB_INST (dev)->ports[port] == -1);
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if (portstatus == datastatus)
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return; // no change - FIXME: read right fields for that test
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if (!datastatus) {
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int devno = HUB_INST (dev)->ports[port];
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if (devno == -1)
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fatal ("FATAL: illegal devno!\n");
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usb_detach_device(dev->controller, devno);
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HUB_INST (dev)->ports[port] = -1;
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return;
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}
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set_feature (dev, port, PORT_RESET, DR_PORT);
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mdelay (20);
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get_status (dev, port, DR_PORT, 4, buf);
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int lowspeed = (buf[0] >> 9) & 1;
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HUB_INST (dev)->ports[port] = usb_attach_device(dev->controller, dev->address, port, lowspeed);
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}
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static int
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usb_hub_report_port_changes (usbdev_t *dev)
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{
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int port;
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unsigned short buf[2];
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for (port = 1; port <= HUB_INST (dev)->num_ports; port++) {
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get_status (dev, port, DR_PORT, 4, buf);
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// FIXME: proper change detection
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int portstatus = ((buf[0] & 1) == 0);
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int datastatus = (HUB_INST (dev)->ports[port] == -1);
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if (portstatus != datastatus)
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return port;
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}
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// no change
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return -1;
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}
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static void
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usb_hub_enable_port (usbdev_t *dev, int port)
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{
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set_feature (dev, port, PORT_POWER, DR_PORT);
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mdelay (20);
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}
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#if 0
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static void
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usb_hub_disable_port (usbdev_t *dev, int port)
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{
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}
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#endif
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static void
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usb_hub_poll (usbdev_t *dev)
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{
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int port;
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while ((port = usb_hub_report_port_changes (dev)) != -1)
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usb_hub_scanport (dev, port);
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}
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void
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usb_hub_init (usbdev_t *dev)
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{
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int i;
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dev->destroy = usb_hub_destroy;
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dev->poll = usb_hub_poll;
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dev->data = malloc (sizeof (usbhub_inst_t));
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if (!dev->data)
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usb_fatal("Not enough memory for USB hub.\n");
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HUB_INST (dev)->descriptor =
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(hub_descriptor_t *) get_descriptor (dev,
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gen_bmRequestType
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(device_to_host,
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class_type, dev_recp),
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0x29, 0, 0);
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HUB_INST (dev)->num_ports = HUB_INST (dev)->descriptor->bNbrPorts;
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HUB_INST (dev)->ports =
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malloc (sizeof (int) * (HUB_INST (dev)->num_ports + 1));
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if (! HUB_INST (dev)->ports)
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usb_fatal("Not enough memory for USB hub ports.\n");
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for (i = 1; i <= HUB_INST (dev)->num_ports; i++)
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HUB_INST (dev)->ports[i] = -1;
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for (i = 1; i <= HUB_INST (dev)->num_ports; i++)
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usb_hub_enable_port (dev, i);
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}
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