514 lines
14 KiB
C
514 lines
14 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008-2010 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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//#define USB_DEBUG
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#include <libpayload-config.h>
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#include <usb/usb.h>
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hci_t *usb_hcs = 0;
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hci_t *
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new_controller (void)
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{
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hci_t *controller = malloc (sizeof (hci_t));
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if (controller) {
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/* atomic */
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controller->next = usb_hcs;
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usb_hcs = controller;
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/* atomic end */
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}
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return controller;
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}
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void
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detach_controller (hci_t *controller)
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{
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if (controller == NULL)
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return;
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if (usb_hcs == controller) {
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usb_hcs = controller->next;
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} else {
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hci_t *it = usb_hcs;
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while (it != NULL) {
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if (it->next == controller) {
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it->next = controller->next;
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return;
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}
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it = it->next;
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}
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}
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}
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/**
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* Shut down all controllers
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*/
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int
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usb_exit (void)
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{
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if (usb_hcs == 0)
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return 0;
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hci_t *controller = usb_hcs;
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while (controller != NULL) {
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controller->shutdown(controller);
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controller = controller->next;
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}
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return 0;
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}
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/**
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* Polls all hubs on all USB controllers, to find out about device changes
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*/
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void
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usb_poll (void)
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{
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if (usb_hcs == 0)
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return;
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hci_t *controller = usb_hcs;
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while (controller != NULL) {
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int i;
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for (i = 0; i < 128; i++) {
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if (controller->devices[i] != 0) {
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controller->devices[i]->poll (controller->devices[i]);
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}
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}
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controller = controller->next;
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}
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}
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void
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init_device_entry (hci_t *controller, int i)
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{
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if (controller->devices[i] != 0)
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usb_debug("warning: device %d reassigned?\n", i);
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controller->devices[i] = malloc(sizeof(usbdev_t));
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controller->devices[i]->controller = controller;
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controller->devices[i]->address = -1;
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controller->devices[i]->hub = -1;
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controller->devices[i]->port = -1;
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controller->devices[i]->init = usb_nop_init;
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controller->devices[i]->init (controller->devices[i]);
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}
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void
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set_feature (usbdev_t *dev, int endp, int feature, int rtype)
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{
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dev_req_t dr;
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dr.bmRequestType = rtype;
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dr.data_dir = host_to_device;
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dr.bRequest = SET_FEATURE;
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dr.wValue = feature;
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dr.wIndex = endp;
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dr.wLength = 0;
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dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
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}
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void
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get_status (usbdev_t *dev, int intf, int rtype, int len, void *data)
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{
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dev_req_t dr;
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dr.bmRequestType = rtype;
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dr.data_dir = device_to_host;
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dr.bRequest = GET_STATUS;
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dr.wValue = 0;
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dr.wIndex = intf;
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dr.wLength = len;
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dev->controller->control (dev, IN, sizeof (dr), &dr, len, data);
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}
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u8 *
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get_descriptor (usbdev_t *dev, unsigned char bmRequestType, int descType,
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int descIdx, int langID)
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{
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u8 buf[8];
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u8 *result;
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dev_req_t dr;
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int size;
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dr.bmRequestType = bmRequestType;
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dr.data_dir = device_to_host; // always like this for descriptors
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dr.bRequest = GET_DESCRIPTOR;
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dr.wValue = (descType << 8) | descIdx;
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dr.wIndex = langID;
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dr.wLength = 8;
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if (dev->controller->control (dev, IN, sizeof (dr), &dr, 8, buf)) {
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usb_debug ("getting descriptor size (type %x) failed\n",
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descType);
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}
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if (descType == 1) {
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device_descriptor_t *dd = (device_descriptor_t *) buf;
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usb_debug ("maxPacketSize0: %x\n", dd->bMaxPacketSize0);
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if (dd->bMaxPacketSize0 != 0)
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dev->endpoints[0].maxpacketsize = dd->bMaxPacketSize0;
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}
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/* special case for configuration descriptors: they carry all their
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subsequent descriptors with them, and keep the entire size at a
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different location */
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size = buf[0];
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if (buf[1] == 2) {
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int realsize = ((unsigned short *) (buf + 2))[0];
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size = realsize;
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}
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result = malloc (size);
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memset (result, 0, size);
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dr.wLength = size;
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if (dev->controller->
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control (dev, IN, sizeof (dr), &dr, size, result)) {
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usb_debug ("getting descriptor (type %x, size %x) failed\n",
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descType, size);
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}
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return result;
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}
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void
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set_configuration (usbdev_t *dev)
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{
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dev_req_t dr;
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dr.bmRequestType = 0;
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dr.bRequest = SET_CONFIGURATION;
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dr.wValue = dev->configuration[5];
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dr.wIndex = 0;
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dr.wLength = 0;
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dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
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}
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int
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clear_feature (usbdev_t *dev, int endp, int feature, int rtype)
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{
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dev_req_t dr;
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dr.bmRequestType = rtype;
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dr.data_dir = host_to_device;
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dr.bRequest = CLEAR_FEATURE;
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dr.wValue = feature;
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dr.wIndex = endp;
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dr.wLength = 0;
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return dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
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}
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int
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clear_stall (endpoint_t *ep)
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{
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usbdev_t *dev = ep->dev;
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int endp = ep->endpoint;
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int rtype = gen_bmRequestType (host_to_device, standard_type,
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endp ? endp_recp : dev_recp);
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int ret = clear_feature (dev, endp, ENDPOINT_HALT, rtype);
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ep->toggle = 0;
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return ret;
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}
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/* returns free address or -1 */
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static int
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get_free_address (hci_t *controller)
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{
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int i;
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for (i = 1; i < 128; i++) {
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if (controller->devices[i] == 0)
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return i;
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}
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usb_debug ("no free address found\n");
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return -1; // no free address
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}
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static int
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set_address (hci_t *controller, int speed, int hubport, int hubaddr)
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{
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int adr = get_free_address (controller); // address to set
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dev_req_t dr;
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configuration_descriptor_t *cd;
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device_descriptor_t *dd;
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memset (&dr, 0, sizeof (dr));
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dr.data_dir = host_to_device;
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dr.req_type = standard_type;
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dr.req_recp = dev_recp;
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dr.bRequest = SET_ADDRESS;
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dr.wValue = adr;
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dr.wIndex = 0;
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dr.wLength = 0;
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init_device_entry(controller, adr);
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usbdev_t *dev = controller->devices[adr];
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// dummy values for registering the address
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dev->address = 0;
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dev->hub = hubaddr;
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dev->port = hubport;
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dev->speed = speed;
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dev->endpoints[0].dev = dev;
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dev->endpoints[0].endpoint = 0;
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dev->endpoints[0].maxpacketsize = 8;
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dev->endpoints[0].toggle = 0;
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dev->endpoints[0].direction = SETUP;
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mdelay (50);
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if (dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0)) {
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usb_debug ("set_address failed\n");
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return -1;
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}
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mdelay (50);
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dev->address = adr;
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dev->descriptor = get_descriptor (dev, gen_bmRequestType
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(device_to_host, standard_type, dev_recp), 1, 0, 0);
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dd = (device_descriptor_t *) dev->descriptor;
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usb_debug ("* found device (0x%04x:0x%04x, USB %x.%x)",
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dd->idVendor, dd->idProduct,
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dd->bcdUSB >> 8, dd->bcdUSB & 0xff);
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dev->quirks = usb_quirk_check(dd->idVendor, dd->idProduct);
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usb_debug ("\ndevice has %x configurations\n", dd->bNumConfigurations);
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if (dd->bNumConfigurations == 0) {
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/* device isn't usable */
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usb_debug ("... no usable configuration!\n");
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dev->address = 0;
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return -1;
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}
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dev->configuration = get_descriptor (dev, gen_bmRequestType
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(device_to_host, standard_type, dev_recp), 2, 0, 0);
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cd = (configuration_descriptor_t *) dev->configuration;
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set_configuration (dev);
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interface_descriptor_t *interface =
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(interface_descriptor_t *) (((char *) cd) + cd->bLength);
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{
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int i;
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int num = cd->bNumInterfaces;
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interface_descriptor_t *current = interface;
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usb_debug ("device has %x interfaces\n", num);
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if (num > 1) {
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int interfaces = usb_interface_check(dd->idVendor, dd->idProduct);
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if (interfaces) {
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/* Well known device, don't warn */
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num = interfaces;
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} else {
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usb_debug ("\nNOTICE: This driver defaults to using the first interface.\n"
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"This might be the wrong choice and lead to limited functionality\n"
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"of the device. Please report such a case to coreboot@coreboot.org\n"
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"as you might be the first.\n");
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/* we limit to the first interface, as there was no need to
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* implement something else for the time being. If you need
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* it, see the SetInterface and GetInterface functions in
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* the USB specification, and adapt appropriately.
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*/
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num = (num > 1) ? 1 : num;
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}
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}
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for (i = 0; i < num; i++) {
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int j;
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usb_debug (" #%x has %x endpoints, interface %x:%x, protocol %x\n",
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current->bInterfaceNumber, current->bNumEndpoints, current->bInterfaceClass, current->bInterfaceSubClass, current->bInterfaceProtocol);
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endpoint_descriptor_t *endp =
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(endpoint_descriptor_t *) (((char *) current)
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+ current->bLength);
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if (interface->bInterfaceClass == 0x3)
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endp = (endpoint_descriptor_t *) (((char *) endp) + ((char *) endp)[0]); // ignore HID descriptor
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memset (dev->endpoints, 0, sizeof (dev->endpoints));
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dev->num_endp = 1; // 0 always exists
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dev->endpoints[0].dev = dev;
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dev->endpoints[0].maxpacketsize = dd->bMaxPacketSize0;
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dev->endpoints[0].direction = SETUP;
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dev->endpoints[0].type = CONTROL;
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for (j = 1; j <= current->bNumEndpoints; j++) {
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#ifdef USB_DEBUG
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static const char *transfertypes[4] = {
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"control", "isochronous", "bulk", "interrupt"
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};
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usb_debug (" #%x: Endpoint %x (%s), max packet size %x, type %s\n", j, endp->bEndpointAddress & 0x7f, ((endp->bEndpointAddress & 0x80) != 0) ? "in" : "out", endp->wMaxPacketSize, transfertypes[endp->bmAttributes]);
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#endif
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endpoint_t *ep =
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&dev->endpoints[dev->num_endp++];
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ep->dev = dev;
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ep->endpoint = endp->bEndpointAddress;
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ep->toggle = 0;
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ep->maxpacketsize = endp->wMaxPacketSize;
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ep->direction =
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((endp->bEndpointAddress & 0x80) ==
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0) ? OUT : IN;
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ep->type = endp->bmAttributes;
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endp = (endpoint_descriptor_t
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*) (((char *) endp) + endp->bLength);
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}
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current = (interface_descriptor_t *) endp;
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}
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}
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int class = dd->bDeviceClass;
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if (class == 0)
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class = interface->bInterfaceClass;
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enum {
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audio_device = 0x01,
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comm_device = 0x02,
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hid_device = 0x03,
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physical_device = 0x05,
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imaging_device = 0x06,
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printer_device = 0x07,
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msc_device = 0x08,
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hub_device = 0x09,
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cdc_device = 0x0a,
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ccid_device = 0x0b,
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security_device = 0x0d,
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video_device = 0x0e,
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healthcare_device = 0x0f,
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diagnostic_device = 0xdc,
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wireless_device = 0xe0,
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misc_device = 0xef,
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};
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usb_debug(", class: ");
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switch (class) {
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case audio_device:
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usb_debug("audio\n");
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break;
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case comm_device:
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usb_debug("communication\n");
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break;
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case hid_device:
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usb_debug ("HID\n");
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#ifdef CONFIG_USB_HID
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controller->devices[adr]->init = usb_hid_init;
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return adr;
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#else
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usb_debug ("NOTICE: USB HID support not compiled in\n");
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#endif
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break;
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case physical_device:
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usb_debug("physical\n");
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break;
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case imaging_device:
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usb_debug("camera\n");
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break;
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case printer_device:
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usb_debug("printer\n");
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break;
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case msc_device:
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usb_debug ("MSC\n");
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#ifdef CONFIG_USB_MSC
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controller->devices[adr]->init = usb_msc_init;
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return adr;
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#else
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usb_debug ("NOTICE: USB MSC support not compiled in\n");
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#endif
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break;
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case hub_device:
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usb_debug ("hub\n");
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#ifdef CONFIG_USB_HUB
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controller->devices[adr]->init = usb_hub_init;
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return adr;
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#else
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usb_debug ("NOTICE: USB hub support not compiled in.\n");
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#endif
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break;
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case cdc_device:
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usb_debug("CDC\n");
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break;
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case ccid_device:
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usb_debug("smartcard / CCID\n");
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break;
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case security_device:
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usb_debug("content security\n");
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break;
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case video_device:
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usb_debug("video\n");
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break;
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case healthcare_device:
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usb_debug("healthcare\n");
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break;
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case diagnostic_device:
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usb_debug("diagnostic\n");
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break;
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case wireless_device:
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usb_debug("wireless\n");
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break;
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default:
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usb_debug("unsupported class %x\n", class);
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break;
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}
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controller->devices[adr]->init = usb_generic_init;
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return adr;
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}
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/*
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* Should be called by the hub drivers whenever a physical detach occurs
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* and can be called by usb class drivers if they are unsatisfied with a
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* malfunctioning device.
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*/
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void
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usb_detach_device(hci_t *controller, int devno)
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{
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/* check if device exists, as we may have
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been called yet by the usb class driver */
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if (controller->devices[devno]) {
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controller->devices[devno]->destroy (controller->devices[devno]);
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free(controller->devices[devno]);
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controller->devices[devno] = NULL;
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}
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}
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int
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usb_attach_device(hci_t *controller, int hubaddress, int port, int speed)
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{
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static const char* speeds[] = { "full", "low", "high" };
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usb_debug ("%sspeed device\n", (speed <= 2) ? speeds[speed] : "invalid value - no");
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int newdev = set_address (controller, speed, port, hubaddress);
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if (newdev == -1)
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return -1;
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usbdev_t *newdev_t = controller->devices[newdev];
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// determine responsible driver - current done in set_address
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newdev_t->init (newdev_t);
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/* init() may have called usb_detach_device() yet, so check */
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return controller->devices[newdev] ? newdev : -1;
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}
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static void
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usb_generic_destroy (usbdev_t *dev)
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{
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if (usb_generic_remove)
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usb_generic_remove(dev);
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}
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void
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usb_generic_init (usbdev_t *dev)
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{
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dev->data = NULL;
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dev->destroy = usb_generic_destroy;
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if (usb_generic_create)
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usb_generic_create(dev);
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}
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