[34] | 1 | /* |
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| 2 | * Linux host USB redirector |
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| 3 | * |
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| 4 | * Copyright (c) 2005 Fabrice Bellard |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 7 | * of this software and associated documentation files (the "Software"), to deal |
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| 8 | * in the Software without restriction, including without limitation the rights |
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| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 10 | * copies of the Software, and to permit persons to whom the Software is |
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| 11 | * furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included in |
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| 14 | * all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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| 22 | * THE SOFTWARE. |
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| 23 | */ |
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| 24 | #include "vl.h" |
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| 25 | |
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| 26 | #if defined(__linux__) |
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| 27 | #include <dirent.h> |
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| 28 | #include <sys/ioctl.h> |
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| 29 | /* Some versions of usbdevice_fs.h need __user to be defined for them. */ |
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| 30 | /* This may (harmlessly) conflict with a definition in linux/compiler.h. */ |
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| 31 | #define __user |
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| 32 | #include <linux/usbdevice_fs.h> |
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| 33 | #include <linux/version.h> |
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| 34 | |
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| 35 | /* We redefine it to avoid version problems */ |
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| 36 | struct usb_ctrltransfer { |
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| 37 | uint8_t bRequestType; |
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| 38 | uint8_t bRequest; |
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| 39 | uint16_t wValue; |
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| 40 | uint16_t wIndex; |
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| 41 | uint16_t wLength; |
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| 42 | uint32_t timeout; |
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| 43 | void *data; |
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| 44 | }; |
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| 45 | |
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| 46 | typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id, |
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| 47 | int vendor_id, int product_id, |
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| 48 | const char *product_name, int speed); |
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| 49 | static int usb_host_find_device(int *pbus_num, int *paddr, |
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| 50 | char *product_name, int product_name_size, |
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| 51 | const char *devname); |
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| 52 | |
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| 53 | //#define DEBUG |
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| 54 | |
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| 55 | #define USBDEVFS_PATH "/proc/bus/usb" |
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| 56 | #define PRODUCT_NAME_SZ 32 |
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| 57 | |
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| 58 | typedef struct USBHostDevice { |
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| 59 | USBDevice dev; |
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| 60 | int fd; |
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| 61 | } USBHostDevice; |
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| 62 | |
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| 63 | static void usb_host_handle_reset(USBDevice *dev) |
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| 64 | { |
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| 65 | #if 0 |
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| 66 | USBHostDevice *s = (USBHostDevice *)dev; |
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| 67 | /* USBDEVFS_RESET, but not the first time as it has already be |
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| 68 | done by the host OS */ |
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| 69 | ioctl(s->fd, USBDEVFS_RESET); |
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| 70 | #endif |
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| 71 | } |
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| 72 | |
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| 73 | static void usb_host_handle_destroy(USBDevice *dev) |
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| 74 | { |
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| 75 | USBHostDevice *s = (USBHostDevice *)dev; |
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| 76 | |
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| 77 | if (s->fd >= 0) |
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| 78 | close(s->fd); |
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| 79 | qemu_free(s); |
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| 80 | } |
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| 81 | |
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| 82 | static int usb_host_handle_control(USBDevice *dev, |
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| 83 | int request, |
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| 84 | int value, |
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| 85 | int index, |
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| 86 | int length, |
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| 87 | uint8_t *data) |
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| 88 | { |
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| 89 | USBHostDevice *s = (USBHostDevice *)dev; |
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| 90 | struct usb_ctrltransfer ct; |
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| 91 | int ret; |
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| 92 | |
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| 93 | if (request == (DeviceOutRequest | USB_REQ_SET_ADDRESS)) { |
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| 94 | /* specific SET_ADDRESS support */ |
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| 95 | dev->addr = value; |
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| 96 | return 0; |
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| 97 | } else { |
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| 98 | ct.bRequestType = request >> 8; |
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| 99 | ct.bRequest = request; |
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| 100 | ct.wValue = value; |
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| 101 | ct.wIndex = index; |
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| 102 | ct.wLength = length; |
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| 103 | ct.timeout = 50; |
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| 104 | ct.data = data; |
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| 105 | ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct); |
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| 106 | if (ret < 0) { |
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| 107 | switch(errno) { |
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| 108 | case ETIMEDOUT: |
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| 109 | return USB_RET_NAK; |
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| 110 | default: |
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| 111 | return USB_RET_STALL; |
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| 112 | } |
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| 113 | } else { |
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| 114 | return ret; |
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| 115 | } |
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| 116 | } |
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| 117 | } |
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| 118 | |
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| 119 | static int usb_host_handle_data(USBDevice *dev, int pid, |
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| 120 | uint8_t devep, |
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| 121 | uint8_t *data, int len) |
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| 122 | { |
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| 123 | USBHostDevice *s = (USBHostDevice *)dev; |
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| 124 | struct usbdevfs_bulktransfer bt; |
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| 125 | int ret; |
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| 126 | |
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| 127 | /* XXX: optimize and handle all data types by looking at the |
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| 128 | config descriptor */ |
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| 129 | if (pid == USB_TOKEN_IN) |
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| 130 | devep |= 0x80; |
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| 131 | bt.ep = devep; |
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| 132 | bt.len = len; |
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| 133 | bt.timeout = 50; |
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| 134 | bt.data = data; |
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| 135 | ret = ioctl(s->fd, USBDEVFS_BULK, &bt); |
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| 136 | if (ret < 0) { |
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| 137 | switch(errno) { |
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| 138 | case ETIMEDOUT: |
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| 139 | return USB_RET_NAK; |
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| 140 | case EPIPE: |
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| 141 | default: |
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| 142 | #ifdef DEBUG |
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| 143 | printf("handle_data: errno=%d\n", errno); |
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| 144 | #endif |
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| 145 | return USB_RET_STALL; |
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| 146 | } |
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| 147 | } else { |
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| 148 | return ret; |
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| 149 | } |
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| 150 | } |
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| 151 | |
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| 152 | /* XXX: exclude high speed devices or implement EHCI */ |
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| 153 | USBDevice *usb_host_device_open(const char *devname) |
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| 154 | { |
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| 155 | int fd, interface, ret, i; |
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| 156 | USBHostDevice *dev; |
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| 157 | struct usbdevfs_connectinfo ci; |
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| 158 | uint8_t descr[1024]; |
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| 159 | char buf[1024]; |
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| 160 | int descr_len, dev_descr_len, config_descr_len, nb_interfaces; |
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| 161 | int bus_num, addr; |
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| 162 | char product_name[PRODUCT_NAME_SZ]; |
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| 163 | |
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| 164 | if (usb_host_find_device(&bus_num, &addr, |
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| 165 | product_name, sizeof(product_name), |
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| 166 | devname) < 0) |
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| 167 | return NULL; |
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| 168 | |
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| 169 | snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d", |
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| 170 | bus_num, addr); |
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| 171 | fd = open(buf, O_RDWR); |
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| 172 | if (fd < 0) { |
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| 173 | perror(buf); |
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| 174 | return NULL; |
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| 175 | } |
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| 176 | |
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| 177 | /* read the config description */ |
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| 178 | descr_len = read(fd, descr, sizeof(descr)); |
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| 179 | if (descr_len <= 0) { |
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| 180 | perror("read descr"); |
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| 181 | goto fail; |
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| 182 | } |
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| 183 | |
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| 184 | i = 0; |
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| 185 | dev_descr_len = descr[0]; |
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| 186 | if (dev_descr_len > descr_len) |
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| 187 | goto fail; |
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| 188 | i += dev_descr_len; |
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| 189 | config_descr_len = descr[i]; |
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| 190 | if (i + config_descr_len > descr_len) |
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| 191 | goto fail; |
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| 192 | nb_interfaces = descr[i + 4]; |
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| 193 | if (nb_interfaces != 1) { |
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| 194 | /* NOTE: currently we grab only one interface */ |
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| 195 | fprintf(stderr, "usb_host: only one interface supported\n"); |
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| 196 | goto fail; |
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| 197 | } |
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| 198 | |
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| 199 | #ifdef USBDEVFS_DISCONNECT |
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| 200 | /* earlier Linux 2.4 do not support that */ |
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| 201 | { |
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| 202 | struct usbdevfs_ioctl ctrl; |
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| 203 | ctrl.ioctl_code = USBDEVFS_DISCONNECT; |
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| 204 | ctrl.ifno = 0; |
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| 205 | ret = ioctl(fd, USBDEVFS_IOCTL, &ctrl); |
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| 206 | if (ret < 0 && errno != ENODATA) { |
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| 207 | perror("USBDEVFS_DISCONNECT"); |
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| 208 | goto fail; |
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| 209 | } |
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| 210 | } |
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| 211 | #endif |
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| 212 | |
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| 213 | /* XXX: only grab if all interfaces are free */ |
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| 214 | interface = 0; |
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| 215 | ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &interface); |
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| 216 | if (ret < 0) { |
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| 217 | if (errno == EBUSY) { |
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| 218 | fprintf(stderr, "usb_host: device already grabbed\n"); |
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| 219 | } else { |
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| 220 | perror("USBDEVFS_CLAIMINTERFACE"); |
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| 221 | } |
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| 222 | fail: |
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| 223 | close(fd); |
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| 224 | return NULL; |
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| 225 | } |
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| 226 | |
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| 227 | ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci); |
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| 228 | if (ret < 0) { |
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| 229 | perror("USBDEVFS_CONNECTINFO"); |
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| 230 | goto fail; |
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| 231 | } |
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| 232 | |
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| 233 | #ifdef DEBUG |
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| 234 | printf("host USB device %d.%d grabbed\n", bus_num, addr); |
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| 235 | #endif |
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| 236 | |
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| 237 | dev = qemu_mallocz(sizeof(USBHostDevice)); |
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| 238 | if (!dev) |
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| 239 | goto fail; |
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| 240 | dev->fd = fd; |
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| 241 | if (ci.slow) |
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| 242 | dev->dev.speed = USB_SPEED_LOW; |
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| 243 | else |
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| 244 | dev->dev.speed = USB_SPEED_HIGH; |
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| 245 | dev->dev.handle_packet = usb_generic_handle_packet; |
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| 246 | |
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| 247 | dev->dev.handle_reset = usb_host_handle_reset; |
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| 248 | dev->dev.handle_control = usb_host_handle_control; |
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| 249 | dev->dev.handle_data = usb_host_handle_data; |
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| 250 | dev->dev.handle_destroy = usb_host_handle_destroy; |
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| 251 | |
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| 252 | if (product_name[0] == '\0') |
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| 253 | snprintf(dev->dev.devname, sizeof(dev->dev.devname), |
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| 254 | "host:%s", devname); |
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| 255 | else |
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| 256 | pstrcpy(dev->dev.devname, sizeof(dev->dev.devname), |
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| 257 | product_name); |
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| 258 | |
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| 259 | return (USBDevice *)dev; |
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| 260 | } |
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| 261 | |
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| 262 | static int get_tag_value(char *buf, int buf_size, |
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| 263 | const char *str, const char *tag, |
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| 264 | const char *stopchars) |
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| 265 | { |
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| 266 | const char *p; |
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| 267 | char *q; |
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| 268 | p = strstr(str, tag); |
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| 269 | if (!p) |
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| 270 | return -1; |
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| 271 | p += strlen(tag); |
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| 272 | while (isspace(*p)) |
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| 273 | p++; |
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| 274 | q = buf; |
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| 275 | while (*p != '\0' && !strchr(stopchars, *p)) { |
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| 276 | if ((q - buf) < (buf_size - 1)) |
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| 277 | *q++ = *p; |
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| 278 | p++; |
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| 279 | } |
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| 280 | *q = '\0'; |
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| 281 | return q - buf; |
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| 282 | } |
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| 283 | |
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| 284 | static int usb_host_scan(void *opaque, USBScanFunc *func) |
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| 285 | { |
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| 286 | FILE *f; |
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| 287 | char line[1024]; |
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| 288 | char buf[1024]; |
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| 289 | int bus_num, addr, speed, device_count, class_id, product_id, vendor_id; |
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| 290 | int ret; |
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| 291 | char product_name[512]; |
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| 292 | |
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| 293 | f = fopen(USBDEVFS_PATH "/devices", "r"); |
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| 294 | if (!f) { |
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| 295 | term_printf("Could not open %s\n", USBDEVFS_PATH "/devices"); |
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| 296 | return 0; |
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| 297 | } |
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| 298 | device_count = 0; |
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| 299 | bus_num = addr = speed = class_id = product_id = vendor_id = 0; |
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| 300 | ret = 0; |
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| 301 | for(;;) { |
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| 302 | if (fgets(line, sizeof(line), f) == NULL) |
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| 303 | break; |
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| 304 | if (strlen(line) > 0) |
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| 305 | line[strlen(line) - 1] = '\0'; |
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| 306 | if (line[0] == 'T' && line[1] == ':') { |
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| 307 | if (device_count && (vendor_id || product_id)) { |
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| 308 | /* New device. Add the previously discovered device. */ |
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| 309 | ret = func(opaque, bus_num, addr, class_id, vendor_id, |
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| 310 | product_id, product_name, speed); |
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| 311 | if (ret) |
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| 312 | goto the_end; |
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| 313 | } |
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| 314 | if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0) |
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| 315 | goto fail; |
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| 316 | bus_num = atoi(buf); |
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| 317 | if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0) |
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| 318 | goto fail; |
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| 319 | addr = atoi(buf); |
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| 320 | if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0) |
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| 321 | goto fail; |
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| 322 | if (!strcmp(buf, "480")) |
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| 323 | speed = USB_SPEED_HIGH; |
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| 324 | else if (!strcmp(buf, "1.5")) |
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| 325 | speed = USB_SPEED_LOW; |
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| 326 | else |
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| 327 | speed = USB_SPEED_FULL; |
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| 328 | product_name[0] = '\0'; |
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| 329 | class_id = 0xff; |
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| 330 | device_count++; |
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| 331 | product_id = 0; |
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| 332 | vendor_id = 0; |
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| 333 | } else if (line[0] == 'P' && line[1] == ':') { |
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| 334 | if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0) |
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| 335 | goto fail; |
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| 336 | vendor_id = strtoul(buf, NULL, 16); |
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| 337 | if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0) |
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| 338 | goto fail; |
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| 339 | product_id = strtoul(buf, NULL, 16); |
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| 340 | } else if (line[0] == 'S' && line[1] == ':') { |
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| 341 | if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0) |
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| 342 | goto fail; |
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| 343 | pstrcpy(product_name, sizeof(product_name), buf); |
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| 344 | } else if (line[0] == 'D' && line[1] == ':') { |
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| 345 | if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0) |
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| 346 | goto fail; |
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| 347 | class_id = strtoul(buf, NULL, 16); |
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| 348 | } |
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| 349 | fail: ; |
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| 350 | } |
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| 351 | if (device_count && (vendor_id || product_id)) { |
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| 352 | /* Add the last device. */ |
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| 353 | ret = func(opaque, bus_num, addr, class_id, vendor_id, |
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| 354 | product_id, product_name, speed); |
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| 355 | } |
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| 356 | the_end: |
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| 357 | fclose(f); |
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| 358 | return ret; |
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| 359 | } |
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| 360 | |
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| 361 | typedef struct FindDeviceState { |
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| 362 | int vendor_id; |
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| 363 | int product_id; |
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| 364 | int bus_num; |
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| 365 | int addr; |
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| 366 | char product_name[PRODUCT_NAME_SZ]; |
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| 367 | } FindDeviceState; |
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| 368 | |
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| 369 | static int usb_host_find_device_scan(void *opaque, int bus_num, int addr, |
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| 370 | int class_id, |
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| 371 | int vendor_id, int product_id, |
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| 372 | const char *product_name, int speed) |
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| 373 | { |
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| 374 | FindDeviceState *s = opaque; |
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| 375 | if ((vendor_id == s->vendor_id && |
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| 376 | product_id == s->product_id) || |
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| 377 | (bus_num == s->bus_num && |
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| 378 | addr == s->addr)) { |
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| 379 | pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name); |
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| 380 | s->bus_num = bus_num; |
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| 381 | s->addr = addr; |
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| 382 | return 1; |
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| 383 | } else { |
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| 384 | return 0; |
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| 385 | } |
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| 386 | } |
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| 387 | |
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| 388 | /* the syntax is : |
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| 389 | 'bus.addr' (decimal numbers) or |
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| 390 | 'vendor_id:product_id' (hexa numbers) */ |
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| 391 | static int usb_host_find_device(int *pbus_num, int *paddr, |
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| 392 | char *product_name, int product_name_size, |
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| 393 | const char *devname) |
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| 394 | { |
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| 395 | const char *p; |
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| 396 | int ret; |
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| 397 | FindDeviceState fs; |
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| 398 | |
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| 399 | p = strchr(devname, '.'); |
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| 400 | if (p) { |
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| 401 | *pbus_num = strtoul(devname, NULL, 0); |
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| 402 | *paddr = strtoul(p + 1, NULL, 0); |
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| 403 | fs.bus_num = *pbus_num; |
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| 404 | fs.addr = *paddr; |
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| 405 | ret = usb_host_scan(&fs, usb_host_find_device_scan); |
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| 406 | if (ret) |
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| 407 | pstrcpy(product_name, product_name_size, fs.product_name); |
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| 408 | return 0; |
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| 409 | } |
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| 410 | p = strchr(devname, ':'); |
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| 411 | if (p) { |
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| 412 | fs.vendor_id = strtoul(devname, NULL, 16); |
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| 413 | fs.product_id = strtoul(p + 1, NULL, 16); |
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| 414 | ret = usb_host_scan(&fs, usb_host_find_device_scan); |
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| 415 | if (ret) { |
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| 416 | *pbus_num = fs.bus_num; |
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| 417 | *paddr = fs.addr; |
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| 418 | pstrcpy(product_name, product_name_size, fs.product_name); |
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| 419 | return 0; |
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| 420 | } |
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| 421 | } |
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| 422 | return -1; |
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| 423 | } |
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| 424 | |
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| 425 | /**********************/ |
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| 426 | /* USB host device info */ |
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| 427 | |
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| 428 | struct usb_class_info { |
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| 429 | int class; |
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| 430 | const char *class_name; |
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| 431 | }; |
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| 432 | |
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| 433 | static const struct usb_class_info usb_class_info[] = { |
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| 434 | { USB_CLASS_AUDIO, "Audio"}, |
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| 435 | { USB_CLASS_COMM, "Communication"}, |
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| 436 | { USB_CLASS_HID, "HID"}, |
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| 437 | { USB_CLASS_HUB, "Hub" }, |
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| 438 | { USB_CLASS_PHYSICAL, "Physical" }, |
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| 439 | { USB_CLASS_PRINTER, "Printer" }, |
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| 440 | { USB_CLASS_MASS_STORAGE, "Storage" }, |
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| 441 | { USB_CLASS_CDC_DATA, "Data" }, |
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| 442 | { USB_CLASS_APP_SPEC, "Application Specific" }, |
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| 443 | { USB_CLASS_VENDOR_SPEC, "Vendor Specific" }, |
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| 444 | { USB_CLASS_STILL_IMAGE, "Still Image" }, |
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| 445 | { USB_CLASS_CSCID, "Smart Card" }, |
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| 446 | { USB_CLASS_CONTENT_SEC, "Content Security" }, |
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| 447 | { -1, NULL } |
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| 448 | }; |
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| 449 | |
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| 450 | static const char *usb_class_str(uint8_t class) |
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| 451 | { |
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| 452 | const struct usb_class_info *p; |
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| 453 | for(p = usb_class_info; p->class != -1; p++) { |
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| 454 | if (p->class == class) |
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| 455 | break; |
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| 456 | } |
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| 457 | return p->class_name; |
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| 458 | } |
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| 459 | |
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| 460 | void usb_info_device(int bus_num, int addr, int class_id, |
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| 461 | int vendor_id, int product_id, |
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| 462 | const char *product_name, |
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| 463 | int speed) |
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| 464 | { |
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| 465 | const char *class_str, *speed_str; |
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| 466 | |
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| 467 | switch(speed) { |
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| 468 | case USB_SPEED_LOW: |
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| 469 | speed_str = "1.5"; |
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| 470 | break; |
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| 471 | case USB_SPEED_FULL: |
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| 472 | speed_str = "12"; |
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| 473 | break; |
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| 474 | case USB_SPEED_HIGH: |
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| 475 | speed_str = "480"; |
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| 476 | break; |
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| 477 | default: |
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| 478 | speed_str = "?"; |
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| 479 | break; |
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| 480 | } |
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| 481 | |
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| 482 | term_printf(" Device %d.%d, speed %s Mb/s\n", |
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| 483 | bus_num, addr, speed_str); |
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| 484 | class_str = usb_class_str(class_id); |
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| 485 | if (class_str) |
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| 486 | term_printf(" %s:", class_str); |
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| 487 | else |
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| 488 | term_printf(" Class %02x:", class_id); |
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| 489 | term_printf(" USB device %04x:%04x", vendor_id, product_id); |
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| 490 | if (product_name[0] != '\0') |
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| 491 | term_printf(", %s", product_name); |
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| 492 | term_printf("\n"); |
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| 493 | } |
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| 494 | |
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| 495 | static int usb_host_info_device(void *opaque, int bus_num, int addr, |
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| 496 | int class_id, |
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| 497 | int vendor_id, int product_id, |
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| 498 | const char *product_name, |
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| 499 | int speed) |
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| 500 | { |
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| 501 | usb_info_device(bus_num, addr, class_id, vendor_id, product_id, |
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| 502 | product_name, speed); |
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| 503 | return 0; |
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| 504 | } |
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| 505 | |
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| 506 | void usb_host_info(void) |
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| 507 | { |
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| 508 | usb_host_scan(NULL, usb_host_info_device); |
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| 509 | } |
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| 510 | |
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| 511 | #else |
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| 512 | |
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| 513 | void usb_host_info(void) |
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| 514 | { |
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| 515 | term_printf("USB host devices not supported\n"); |
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| 516 | } |
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| 517 | |
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| 518 | /* XXX: modify configure to compile the right host driver */ |
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| 519 | USBDevice *usb_host_device_open(const char *devname) |
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| 520 | { |
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| 521 | return NULL; |
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| 522 | } |
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| 523 | |
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| 524 | #endif |
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