bertos/drv/usbmouse.c

   1 /**
   2  * \file
   3  * <!--
   4  * This file is part of BeRTOS.
   5  *
   6  * Bertos is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  * As a special exception, you may use this file as part of a free software
  21  * library without restriction.  Specifically, if other files instantiate
  22  * templates or use macros or inline functions from this file, or you compile
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  24  * file does not by itself cause the resulting executable to be covered by
  25  * the GNU General Public License.  This exception does not however
  26  * invalidate any other reasons why the executable file might be covered by
  27  * the GNU General Public License.
  28  *
  29  * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
  30  *
  31  * -->
  32  *
  33  * \author Andrea Righi <arighi@develer.com>
  34  *
  35  * \brief Generic USB mouse device driver.
  36  *
  37  */
  38
  39 #include "usb_hid.h"
  40 #include "usbmouse.h"
  41
  42 #include "cfg/cfg_usbmouse.h"
  43
  44 #define LOG_LEVEL  USB_MOUSE_LOG_LEVEL
  45 #define LOG_FORMAT USB_MOUSE_LOG_FORMAT
  46
  47 #include <cfg/log.h>
  48 #include <cfg/debug.h>
  49 #include <cfg/macros.h>
  50 #include <cfg/compiler.h>
  51 #include <cfg/module.h>
  52
  53 #include <cpu/power.h> // cpu_relax()
  54
  55 #include <drv/usb.h>
  56 #include <drv/usb_endpoint.h>
  57
  58
  59 /*
  60  * HID device configuration (usb-mouse)
  61  */
  62 #define USB_HID_VENDOR_ID       USB_MOUSE_VENDOR_ID
  63 #define USB_HID_PRODUCT_ID      USB_MOUSE_PRODUCT_ID
  64
  65 #define USB_HID_INTERFACES      1
  66 #define USB_HID_ENDPOINTS       1
  67
  68 #define USB_STRING_MANUFACTURER 1
  69 #define USB_STRING_PRODUCT      2
  70
  71 #define USB_HID_REPORT_EP       (USB_DIR_IN | USB_MOUSE_EP_REPORT)
  72
  73 static UsbDeviceDesc usb_hid_device_descriptor =
  74 {
  75         .bLength = sizeof(usb_hid_device_descriptor),
  76         .bDescriptorType = USB_DT_DEVICE,
  77         .bcdUSB = 0x100,
  78         .bDeviceClass = 0,
  79         .bDeviceSubClass = 0,
  80         .bDeviceProtocol = 0,
  81         .idVendor = USB_HID_VENDOR_ID,
  82         .idProduct = USB_HID_PRODUCT_ID,
  83         .bcdDevice = 0,
  84         .iManufacturer = USB_STRING_MANUFACTURER,
  85         .iProduct = USB_STRING_PRODUCT,
  86         .iSerialNumber = 0,
  87         .bNumConfigurations = 1,
  88 };
  89
  90 static const UsbConfigDesc usb_hid_config_descriptor =
  91 {
  92         .bLength = sizeof(usb_hid_config_descriptor),
  93         .bDescriptorType = USB_DT_CONFIG,
  94         .bNumInterfaces = USB_HID_INTERFACES,
  95         .bConfigurationValue = 1,
  96         .iConfiguration = 0,
  97         .bmAttributes = USB_CONFIG_ATT_ONE,
  98         .bMaxPower = 50, /* 100 mA */
  99 };
 100
 101 static const UsbInterfaceDesc usb_hid_interface_descriptor =
 102 {
 103         .bLength = sizeof(usb_hid_interface_descriptor),
 104         .bDescriptorType = USB_DT_INTERFACE,
 105         .bInterfaceNumber = 0,
 106         .bAlternateSetting = 0,
 107         .bNumEndpoints = USB_HID_ENDPOINTS,
 108         .bInterfaceClass = USB_CLASS_HID,
 109         .bInterfaceSubClass = USB_INTERFACE_SUBCLASS_BOOT,
 110         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE,
 111         .iInterface = 0,
 112 };
 113
 114 static const uint8_t hid_report_descriptor[] =
 115 {
 116         0x05, 0x01, // Usage Page (Generic Desktop)
 117         0x09, 0x02, // Usage (Mouse)
 118         0xA1, 0x01, // Collection (Application)
 119         0x09, 0x01, // Usage (Pointer)
 120         0xA1, 0x00, // Collection (Physical)
 121         0x05, 0x09, // Usage Page (Buttons)
 122         0x19, 0x01, // Usage Minimum (1)
 123         0x29, 0x03, // Usage Maximum (3)
 124         0x15, 0x00, // Logical Minimum (0)
 125         0x25, 0x01, // Logical Maximum (1)
 126         0x95, 0x03, // Report Count (3)
 127         0x75, 0x01, // Report Size (1)
 128         0x81, 0x02, // Input (Data, Variable, Absolute)
 129         0x95, 0x01, // Report Count (1)
 130         0x75, 0x05, // Report Size (5)
 131         0x81, 0x01, // Input (03=Logitech, 01=Hid spec:Constant)
 132         0x05, 0x01, // Usage Page (Generic Desktop)
 133         0x09, 0x30, // Usage (X)
 134         0x09, 0x31, // Usage (Y)
 135         0x09, 0x38, // Usage (Logitech:_)
 136         0x15, 0x81, // Logical Minimum (-127)
 137         0x25, 0x7F, // Logical Maximum (127)
 138         0x75, 0x08, // Report Size (8)
 139         0x95, 0x02, // Report Count (Logitech=3, Hid spec =2)
 140         0x81, 0x06, // Input (Data, Variable, Relative)
 141         0xC0,   // End Collection
 142         0xC0    // End Collection
 143 };
 144
 145 static const usb_HidDesc usb_hid_descriptor =
 146 {
 147         .bLength = sizeof(usb_hid_descriptor),
 148         .bDescriptorType = HID_DT_HID,
 149         .bcdHID = usb_cpu_to_le16((uint16_t)0x0110),
 150         .bCountryCode = 0,
 151         .bNumDescriptors = 1,
 152         .bDescriptorHidType = HID_DT_REPORT,
 153         .wDescriptorLength =
 154                 usb_cpu_to_le16((uint16_t)sizeof(hid_report_descriptor)),
 155 };
 156
 157 static const UsbEndpointDesc usb_hid_ep_descriptor =
 158 {
 159         .bLength = sizeof(usb_hid_ep_descriptor),
 160         .bDescriptorType = USB_DT_ENDPOINT,
 161         .bEndpointAddress = USB_HID_REPORT_EP,
 162         .bmAttributes = USB_ENDPOINT_XFER_INT,
 163         .wMaxPacketSize = usb_cpu_to_le16((uint16_t)4),
 164         .bInterval = 10, /* resolution in ms */
 165 };
 166
 167 static const UsbDescHeader *usb_hid_config[] =
 168 {
 169         (const UsbDescHeader *)&usb_hid_config_descriptor,
 170         (const UsbDescHeader *)&usb_hid_interface_descriptor,
 171         (const UsbDescHeader *)&usb_hid_descriptor,
 172         (const UsbDescHeader *)&usb_hid_ep_descriptor,
 173         NULL,
 174 };
 175
 176 static const DEFINE_USB_STRING(language_str, "\x09\x04"); // Language ID: en_US
 177 static const DEFINE_USB_STRING(manufacturer_str,
 178                 USB_STRING("B", "e", "R", "T", "O", "S"));
 179 static const DEFINE_USB_STRING(product_str,
 180                 USB_STRING("U", "S", "B", " ", "M", "o", "u", "s", "e"));
 181
 182 static const UsbStringDesc *usb_hid_strings[] =
 183 {
 184         (const UsbStringDesc *)&language_str,
 185         (const UsbStringDesc *)&manufacturer_str,
 186         (const UsbStringDesc *)&product_str,
 187         NULL,
 188 };
 189
 190 typedef struct mouse_report
 191 {
 192         uint8_t buttons;
 193         int8_t x;
 194         int8_t y;
 195 } PACKED mouse_report_t;
 196
 197 static mouse_report_t report;
 198
 199 static bool hid_mouse_configured;
 200
 201 static void usb_hid_event_cb(UsbCtrlRequest *ctrl)
 202 {
 203         uint16_t value = usb_le16_to_cpu(ctrl->wValue);
 204         uint16_t index = usb_le16_to_cpu(ctrl->wIndex);
 205         uint16_t length = usb_le16_to_cpu(ctrl->wLength);
 206         uint8_t type = ctrl->mRequestType;
 207         uint8_t request = ctrl->bRequest;
 208
 209         LOG_INFO("%s: s 0x%02x 0x%02x 0x%04x 0x%04x 0x%04x\n",
 210                 __func__, type, request, value, index, length);
 211         switch (ctrl->bRequest)
 212         {
 213         case USB_REQ_GET_DESCRIPTOR:
 214                 switch (value >> 8)
 215                 {
 216                 case HID_DT_HID:
 217                         LOG_INFO("%s: HID_DT_HID\n", __func__);
 218                         usb_endpointWrite(USB_DIR_IN | 0,
 219                                         &usb_hid_descriptor,
 220                                         sizeof(usb_hid_descriptor));
 221                         break;
 222                 case HID_DT_REPORT:
 223                         LOG_INFO("%s: HID_DT_REPORT\n", __func__);
 224                         usb_endpointWrite(USB_DIR_IN | 0,
 225                                         &hid_report_descriptor,
 226                                         sizeof(hid_report_descriptor));
 227                         hid_mouse_configured = true;
 228                         break;
 229                 }
 230                 break;
 231         case HID_REQ_GET_REPORT:
 232                 LOG_INFO("%s: HID_REQ_GET_REPORT\n", __func__);
 233                 break;
 234         case HID_REQ_SET_REPORT:
 235                 LOG_INFO("%s: HID_REQ_SET_REPORT\n", __func__);
 236                 break;
 237         case HID_REQ_GET_IDLE:
 238                 LOG_INFO("%s: HID_REQ_GET_IDLE\n", __func__);
 239                 break;
 240         case HID_REQ_SET_IDLE:
 241                 LOG_INFO("%s: HID_REQ_SET_IDLE\n", __func__);
 242                 usb_endpointWrite(USB_DIR_IN | 0, NULL, 0);
 243                 break;
 244         case HID_REQ_GET_PROTOCOL:
 245                 LOG_INFO("%s: HID_REQ_GET_PROTOCOL\n", __func__);
 246                 break;
 247         case HID_REQ_SET_PROTOCOL:
 248                 LOG_INFO("%s: HID_REQ_SET_PROTOCOL\n", __func__);
 249                 break;
 250         default:
 251                 LOG_ERR("%s: unknown request: 0x%02x\n",
 252                         __func__, ctrl->bRequest);
 253                 break;
 254         }
 255 }
 256
 257 /* Global usb-mouse descriptor that identifies the usb-mouse device */
 258 static UsbDevice usb_mouse = {
 259         .device = &usb_hid_device_descriptor,
 260         .config = usb_hid_config,
 261         .strings = usb_hid_strings,
 262         .event_cb = usb_hid_event_cb,
 263 };
 264
 265 /* Low-level usb-hid device initialization */
 266 static int usb_mouse_hw_init(void)
 267 {
 268         if (usb_deviceRegister(&usb_mouse) < 0)
 269                 return -1;
 270         LOG_INFO("usb-hid: registered new USB mouse device\n");
 271         return 0;
 272 }
 273
 274 /* Send a mouse event */
 275 void usbmouse_sendEvent(int8_t x, int8_t y, int8_t buttons)
 276 {
 277         report.x = x;
 278         report.y = y;
 279         report.buttons = buttons;
 280         usb_endpointWrite(USB_HID_REPORT_EP, &report, sizeof(report));
 281 }
 282
 283 /*
 284  * Initialize a USB HID device.
 285  *
 286  * TODO: support more than one device at the same time.
 287  */
 288 int usbmouse_init(UNUSED_ARG(int, unit))
 289 {
 290 #if CONFIG_KERN
 291         MOD_CHECK(proc);
 292 #endif
 293         usb_mouse_hw_init();
 294         while (!hid_mouse_configured)
 295                 cpu_relax();
 296         return 0;
 297 }