8992e53c23
Restructure USB stack to not depend on PCI, and make PCI stub available on x86, but provide fixed BARs for ARM (Exynos 5) Change-Id: Iee7c8b134c22b661a9a515e24943470c9dbadd1f Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: https://gerrit.chromium.org/gerrit/49970 Reviewed-on: http://review.coreboot.org/4175 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
140 lines
4.2 KiB
C
140 lines
4.2 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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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 int
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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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*/
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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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