246 lines
6.4 KiB
C
246 lines
6.4 KiB
C
/*-
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* Copyright (c) 2014 Nahanni Systems Inc.
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* All rights reserved.
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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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*
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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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/*
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* USB emulation designed as following diagram. It devided into three layers:
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* HCD: USB host controller device layer, like xHCI, eHCI...
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* USB core: middle abstraction layer for USB statck.
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* USB Port Mapper: This layer supports to share physical USB
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* devices(physical ports) to spcified virtual USB port of
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* HCD DM. All the commands and data transfers are through
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* Libusb to access native USB stack.
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*
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* +---------------+
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* | |
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* +----------+----------+ |
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* | ACRN DM | |
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* | +-----------------+ | |
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* | | HCD (xHCI) | | |
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* | +-----------------+ | |
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* | | | |
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* | +-----------------+ | |
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* | | USB Core | | |
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* | +-----------------+ | |
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* | | | |
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* | +-----------------+ | |
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* | | USB Port Mapper | | |
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* | +-----------------+ | |
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* | | | |
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* | +-----------------+ | |
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* | | Libusb | | |
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* | +-----------------+ | |
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* +---------------------+ |
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* Service OS User Space | User OS User Space
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* |
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* -------------------------- | ---------------------------
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* |
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* Service OS Kernel Space | User OS Kernel Space
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* |
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* | +-----------------+
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* | | USB Core |
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* | +-----------------+
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* | |
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* | +-----------------+
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* | | HCD |
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* | | (xHCI/uHCI/...) |
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* | +--------+--------+
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* | |
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* +-------------+
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* Current distribution:
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* HCD: xhci.{h,c}
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* USB core: usb_core.{h,c}
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* USB device: usb_mouse.c usb_pmapper.{h,c}
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*/
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#include <sys/types.h>
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "usb_core.h"
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SET_DECLARE(usb_emu_set, struct usb_devemu);
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int usb_log_level;
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struct usb_devemu *
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usb_emu_finddev(char *name)
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{
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struct usb_devemu **udpp, *udp;
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SET_FOREACH(udpp, usb_emu_set) {
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udp = *udpp;
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if (!strcmp(udp->ue_emu, name))
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return udp;
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}
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return NULL;
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}
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struct usb_data_xfer_block *
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usb_data_xfer_append(struct usb_data_xfer *xfer, void *buf, int blen,
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void *hci_data, int ccs)
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{
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struct usb_data_xfer_block *xb;
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if (xfer->ndata >= USB_MAX_XFER_BLOCKS)
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return NULL;
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xb = &xfer->data[xfer->tail];
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xb->buf = buf;
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xb->blen = blen;
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xb->hci_data = hci_data;
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xb->ccs = ccs;
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xb->processed = USB_XFER_BLK_FREE;
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xb->bdone = 0;
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xfer->ndata++;
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xfer->tail = (xfer->tail + 1) % USB_MAX_XFER_BLOCKS;
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return xb;
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}
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int
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usb_native_is_bus_existed(uint8_t bus_num)
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{
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char buf[128];
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snprintf(buf, sizeof(buf), "%s/usb%d", NATIVE_USBSYS_DEVDIR, bus_num);
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return access(buf, R_OK) ? 0 : 1;
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}
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int
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usb_native_is_ss_port(uint8_t bus_of_port)
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{
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char buf[128];
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char speed[8];
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int rc, fd;
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int usb2_speed_sz = sizeof(NATIVE_USB2_SPEED);
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int usb3_speed_sz = sizeof(NATIVE_USB3_SPEED);
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assert(usb_native_is_bus_existed(bus_of_port));
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snprintf(buf, sizeof(buf), "%s/usb%d/speed", NATIVE_USBSYS_DEVDIR,
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bus_of_port);
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if (access(buf, R_OK)) {
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UPRINTF(LWRN, "can't find speed file\r\n");
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return 0;
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}
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fd = open(buf, O_RDONLY);
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if (fd < 0) {
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UPRINTF(LWRN, "fail to open maxchild file\r\n");
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return 0;
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}
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rc = read(fd, &speed, sizeof(speed));
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if (rc < 0) {
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UPRINTF(LWRN, "fail to read speed file\r\n");
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goto errout;
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}
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if (rc < usb2_speed_sz) {
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UPRINTF(LWRN, "read invalid speed data\r\n");
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goto errout;
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}
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if (strncmp(speed, NATIVE_USB3_SPEED, usb3_speed_sz))
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goto errout;
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close(fd);
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return 1;
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errout:
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close(fd);
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return 0;
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}
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int
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usb_native_is_port_existed(uint8_t bus_num, uint8_t port_num)
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{
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int native_port_cnt;
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int rc, fd;
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char buf[128];
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char cnt[8];
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if (!usb_native_is_bus_existed(bus_num))
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return 0;
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snprintf(buf, sizeof(buf), "%s/usb%d/maxchild", NATIVE_USBSYS_DEVDIR,
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bus_num);
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if (access(buf, R_OK)) {
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UPRINTF(LWRN, "can't find maxchild file\r\n");
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return 0;
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}
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fd = open(buf, O_RDONLY);
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if (fd < 0) {
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UPRINTF(LWRN, "fail to open maxchild file\r\n");
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return 0;
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}
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rc = read(fd, &cnt, sizeof(cnt));
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if (rc < 0) {
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UPRINTF(LWRN, "fail to read maxchild file\r\n");
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close(fd);
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return 0;
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}
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native_port_cnt = atoi(cnt);
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if (port_num > native_port_cnt || port_num < 0) {
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UPRINTF(LWRN, "invalid port_num %d, max port count %d\r\n",
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port_num, native_port_cnt);
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close(fd);
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return 0;
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}
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close(fd);
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return 1;
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}
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void usb_parse_log_level(char level)
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{
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switch (level) {
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case 'F':
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case 'f':
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usb_set_log_level(LFTL);
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break;
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case 'W':
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case 'w':
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usb_set_log_level(LWRN);
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break;
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case 'I':
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case 'i':
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usb_set_log_level(LINF);
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break;
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case 'D':
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case 'd':
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usb_set_log_level(LDBG);
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break;
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case 'V':
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case 'v':
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usb_set_log_level(LVRB);
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break;
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default:
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usb_set_log_level(LFTL);
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}
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}
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