e00ba2168b
This patch removes the confusing concept of a special "xhci_speed" with a different numeric value from the usual speed used throughout the USB core (except for the places directly interacting with the xHC, which are explicitly marked). It also moves the MPS0 decoding function into the core and moves some definitions around in preparation of later changes that will make the stack SuperSpeed-ready. It makes both set_address implementations share a constant for the specification-defined SetAddress() recovery delay and removes pointless additional delays from the non-XHCI version. Change-Id: I422379d05d4a502b12dae183504e5231add5466a Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/170664 Reviewed-by: Stefan Reinauer <reinauer@google.com> Commit-Queue: Ronald Minnich <rminnich@chromium.org> (cherry picked from commit f160d4439c0d7cea1d2e6b97207935d61dcbb2f2) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6776 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
141 lines
4.3 KiB
C
141 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) 2013 secunet Security Networks AG
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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 <usb/usb.h>
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#include "generic_hub.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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/* status (and status change) bits */
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#define PORT_CONNECTION 0x1
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#define PORT_ENABLE 0x2
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#define PORT_RESET 0x10
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/* feature selectors (for setting / clearing features) */
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#define SEL_PORT_RESET 0x4
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#define SEL_PORT_POWER 0x8
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#define SEL_C_PORT_CONNECTION 0x10
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static int
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usb_hub_port_status_changed(usbdev_t *const dev, const int port)
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{
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unsigned short buf[2] = { 0, 0 };
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get_status (dev, port, DR_PORT, 4, buf);
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if (buf[1] & PORT_CONNECTION)
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clear_feature (dev, port, SEL_C_PORT_CONNECTION, DR_PORT);
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return buf[1] & PORT_CONNECTION;
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}
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static int
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usb_hub_port_connected(usbdev_t *const dev, const int port)
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{
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unsigned short buf[2] = { 0, 0 };
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get_status (dev, port, DR_PORT, 4, buf);
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return buf[0] & PORT_CONNECTION;
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}
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static int
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usb_hub_port_in_reset(usbdev_t *const dev, const int port)
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{
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unsigned short buf[2] = { 0, 0 };
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get_status (dev, port, DR_PORT, 4, buf);
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return buf[0] & PORT_RESET;
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}
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static int
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usb_hub_port_enabled(usbdev_t *const dev, const int port)
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{
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unsigned short buf[2] = { 0, 0 };
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get_status (dev, port, DR_PORT, 4, buf);
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return (buf[0] & PORT_ENABLE) != 0;
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}
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static usb_speed
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usb_hub_port_speed(usbdev_t *const dev, const int port)
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{
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unsigned short buf[2] = { 0, 0 };
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get_status (dev, port, DR_PORT, 4, buf);
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if (buf[0] & PORT_ENABLE) {
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/* bit 10 9
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* 0 0 full speed
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* 0 1 low speed
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* 1 0 high speed
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* 1 1 super speed (hack, not in spec!)
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*/
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return (buf[0] >> 9) & 0x3;
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} else {
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return -1;
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}
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}
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static int
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usb_hub_enable_port(usbdev_t *const dev, const int port)
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{
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set_feature(dev, port, SEL_PORT_POWER, DR_PORT);
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return 0;
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}
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static int
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usb_hub_start_port_reset(usbdev_t *const dev, const int port)
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{
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set_feature (dev, port, SEL_PORT_RESET, DR_PORT);
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return 0;
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}
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static const generic_hub_ops_t usb_hub_ops = {
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.hub_status_changed = NULL,
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.port_status_changed = usb_hub_port_status_changed,
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.port_connected = usb_hub_port_connected,
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.port_in_reset = usb_hub_port_in_reset,
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.port_enabled = usb_hub_port_enabled,
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.port_speed = usb_hub_port_speed,
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.enable_port = usb_hub_enable_port,
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.disable_port = NULL,
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.start_port_reset = usb_hub_start_port_reset,
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.reset_port = generic_hub_resetport,
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};
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void
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usb_hub_init(usbdev_t *const dev)
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{
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hub_descriptor_t *const descriptor = (hub_descriptor_t *)
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get_descriptor(
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dev,
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gen_bmRequestType(device_to_host, class_type, dev_recp),
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0x29, 0, 0);
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if (!descriptor) {
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usb_debug("usbhub: ERROR: Failed to fetch hub descriptor\n");
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return;
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}
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const int num_ports = descriptor->bNbrPorts;
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free(descriptor);
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generic_hub_init(dev, num_ports, &usb_hub_ops);
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}
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