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 "cfg/cfg_usbmouse.h"
  40
  41 #define LOG_LEVEL  USB_MOUSE_LOG_LEVEL
  42 #define LOG_FORMAT USB_MOUSE_LOG_FORMAT
  43
  44 #include <cfg/log.h>
  45 #include <cfg/debug.h>
  46 #include <cfg/macros.h>
  47 #include <cfg/compiler.h>
  48 #include <cfg/module.h>
  49
  50 #include <cpu/power.h> // cpu_relax()
  51
  52 #include <drv/usb.h>
  53
  54 #include "drv/usb_hid.h"
  55 #include "drv/usbmouse.h"
  56
  57 /*
  58  * HID device configuration (usb-mouse)
  59  */
  60 #define USB_HID_VENDOR_ID       0xffff /* custom */
  61 #define USB_HID_PRODUCT_ID      0x0000
  62
  63 #define USB_HID_INTERFACES      1
  64 #define USB_HID_ENDPOINTS       1
  65
  66 #define USB_STRING_MANUFACTURER 1
  67 #define USB_STRING_PRODUCT      2
  68
  69 #define USB_HID_REPORT_EP       (USB_DIR_IN | 1)
  70
  71 static UsbDeviceDesc usb_hid_device_descriptor =
  72 {
  73         .bLength = sizeof(usb_hid_device_descriptor),
  74         .bDescriptorType = USB_DT_DEVICE,
  75         .bcdUSB = 0x100,
  76         .bDeviceClass = 0,
  77         .bDeviceSubClass = 0,
  78         .bDeviceProtocol = 0,
  79         .idVendor = USB_HID_VENDOR_ID,
  80         .idProduct = USB_HID_PRODUCT_ID,
  81         .bcdDevice = 0,
  82         .iManufacturer = USB_STRING_MANUFACTURER,
  83         .iProduct = USB_STRING_PRODUCT,
  84         .iSerialNumber = 0,
  85         .bNumConfigurations = 1,
  86 };
  87
  88 static const UsbConfigDesc usb_hid_config_descriptor =
  89 {
  90         .bLength = sizeof(usb_hid_config_descriptor),
  91         .bDescriptorType = USB_DT_CONFIG,
  92         .bNumInterfaces = USB_HID_INTERFACES,
  93         .bConfigurationValue = 1,
  94         .iConfiguration = 0,
  95         .bmAttributes = USB_CONFIG_ATT_ONE,
  96         .bMaxPower = 50, /* 100 mA */
  97 };
  98
  99 static const UsbInterfaceDesc usb_hid_interface_descriptor =
 100 {
 101         .bLength = sizeof(usb_hid_interface_descriptor),
 102         .bDescriptorType = USB_DT_INTERFACE,
 103         .bInterfaceNumber = 0,
 104         .bAlternateSetting = 0,
 105         .bNumEndpoints = USB_HID_ENDPOINTS,
 106         .bInterfaceClass = USB_CLASS_HID,
 107         .bInterfaceSubClass = USB_INTERFACE_SUBCLASS_BOOT,
 108         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE,
 109         .iInterface = 0,
 110 };
 111
 112 static const uint8_t hid_report_descriptor[] =
 113 {
 114         0x05, 0x01, // Usage Page (Generic Desktop)
 115         0x09, 0x02, // Usage (Mouse)
 116         0xA1, 0x01, // Collection (Application)
 117         0x09, 0x01, // Usage (Pointer)
 118         0xA1, 0x00, // Collection (Physical)
 119         0x05, 0x09, // Usage Page (Buttons)
 120         0x19, 0x01, // Usage Minimum (1)
 121         0x29, 0x03, // Usage Maximum (3)
 122         0x15, 0x00, // Logical Minimum (0)
 123         0x25, 0x01, // Logical Maximum (1)
 124         0x95, 0x03, // Report Count (3)
 125         0x75, 0x01, // Report Size (1)
 126         0x81, 0x02, // Input (Data, Variable, Absolute)
 127         0x95, 0x01, // Report Count (1)
 128         0x75, 0x05, // Report Size (5)
 129         0x81, 0x01, // Input (03=Logitech, 01=Hid spec:Constant)
 130         0x05, 0x01, // Usage Page (Generic Desktop)
 131         0x09, 0x30, // Usage (X)
 132         0x09, 0x31, // Usage (Y)
 133         0x09, 0x38, // Usage (Logitech:_)
 134         0x15, 0x81, // Logical Minimum (-127)
 135         0x25, 0x7F, // Logical Maximum (127)
 136         0x75, 0x08, // Report Size (8)
 137         0x95, 0x02, // Report Count (Logitech=3, Hid spec =2)
 138         0x81, 0x06, // Input (Data, Variable, Relative)
 139         0xC0,   // End Collection
 140         0xC0    // End Collection
 141 };
 142
 143 static const usb_HidDesc usb_hid_descriptor =
 144 {
 145         .bLength = sizeof(usb_hid_descriptor),
 146         .bDescriptorType = HID_DT_HID,
 147         .bcdHID = usb_cpu_to_le16((uint16_t)0x0110),
 148         .bCountryCode = 0,
 149         .bNumDescriptors = 1,
 150         .bDescriptorHidType = HID_DT_REPORT,
 151         .wDescriptorLength =
 152                 usb_cpu_to_le16((uint16_t)sizeof(hid_report_descriptor)),
 153 };
 154
 155 static const UsbEndpointDesc usb_hid_ep_descriptor =
 156 {
 157         .bLength = sizeof(usb_hid_ep_descriptor),
 158         .bDescriptorType = USB_DT_ENDPOINT,
 159         .bEndpointAddress = USB_HID_REPORT_EP,
 160         .bmAttributes = USB_ENDPOINT_XFER_INT,
 161         .wMaxPacketSize = usb_cpu_to_le16((uint16_t)4),
 162         .bInterval = 10, /* resolution in ms */
 163 };
 164
 165 static const UsbDescHeader *usb_hid_config[] =
 166 {
 167         (const UsbDescHeader *)&usb_hid_config_descriptor,
 168         (const UsbDescHeader *)&usb_hid_interface_descriptor,
 169         (const UsbDescHeader *)&usb_hid_descriptor,
 170         (const UsbDescHeader *)&usb_hid_ep_descriptor,
 171         NULL,
 172 };
 173
 174 static DEFINE_USB_STRING(language_str, "\x09\x04"); // Language ID: en_US
 175 static DEFINE_USB_STRING(manufacturer_str,
 176                 USB_STRING("B", "e", "R", "T", "O", "S"));
 177 static DEFINE_USB_STRING(product_str,
 178                 USB_STRING("U", "S", "B", " ", "M", "o", "u", "s", "e"));
 179
 180 static const UsbStringDesc *usb_hid_strings[] =
 181 {
 182         (UsbStringDesc *)&language_str,
 183         (UsbStringDesc *)&manufacturer_str,
 184         (UsbStringDesc *)&product_str,
 185         NULL,
 186 };
 187
 188 typedef struct mouse_report
 189 {
 190         uint8_t buttons;
 191         int8_t x;
 192         int8_t y;
 193 } PACKED mouse_report_t;
 194
 195 static mouse_report_t report;
 196
 197 static bool hid_mouse_configured;
 198
 199 static void usb_hid_event_cb(UsbCtrlRequest *ctrl)
 200 {
 201         uint16_t value = usb_le16_to_cpu(ctrl->wValue);
 202         uint16_t index = usb_le16_to_cpu(ctrl->wIndex);
 203         uint16_t length = usb_le16_to_cpu(ctrl->wLength);
 204         uint8_t type = ctrl->mRequestType;
 205         uint8_t request = ctrl->bRequest;
 206
 207         LOG_INFO("%s: s 0x%02x 0x%02x 0x%04x 0x%04x 0x%04x\n",
 208                 __func__, type, request, value, index, length);
 209         switch (ctrl->bRequest)
 210         {
 211         case USB_REQ_GET_DESCRIPTOR:
 212                 switch (value >> 8)
 213                 {
 214                 case HID_DT_HID:
 215                         LOG_INFO("%s: HID_DT_HID\n", __func__);
 216                         usb_endpointWrite(USB_DIR_IN | 0,
 217                                         &usb_hid_descriptor,
 218                                         sizeof(usb_hid_descriptor));
 219                         break;
 220                 case HID_DT_REPORT:
 221                         LOG_INFO("%s: HID_DT_REPORT\n", __func__);
 222                         usb_endpointWrite(USB_DIR_IN | 0,
 223                                         &hid_report_descriptor,
 224                                         sizeof(hid_report_descriptor));
 225                         hid_mouse_configured = true;
 226                         break;
 227                 }
 228                 break;
 229         case HID_REQ_GET_REPORT:
 230                 LOG_INFO("%s: HID_REQ_GET_REPORT\n", __func__);
 231                 break;
 232         case HID_REQ_SET_REPORT:
 233                 LOG_INFO("%s: HID_REQ_SET_REPORT\n", __func__);
 234                 break;
 235         case HID_REQ_GET_IDLE:
 236                 LOG_INFO("%s: HID_REQ_GET_IDLE\n", __func__);
 237                 break;
 238         case HID_REQ_SET_IDLE:
 239                 LOG_INFO("%s: HID_REQ_SET_IDLE\n", __func__);
 240                 usb_endpointWrite(USB_DIR_IN | 0, NULL, 0);
 241                 break;
 242         case HID_REQ_GET_PROTOCOL:
 243                 LOG_INFO("%s: HID_REQ_GET_PROTOCOL\n", __func__);
 244                 break;
 245         case HID_REQ_SET_PROTOCOL:
 246                 LOG_INFO("%s: HID_REQ_SET_PROTOCOL\n", __func__);
 247                 break;
 248         default:
 249                 LOG_ERR("%s: unknown request: 0x%02x\n",
 250                         __func__, ctrl->bRequest);
 251                 break;
 252         }
 253 }
 254
 255 /* Global usb-mouse descriptor that identifies the usb-mouse device */
 256 static UsbDevice usb_mouse = {
 257         .device = &usb_hid_device_descriptor,
 258         .config = usb_hid_config,
 259         .strings = usb_hid_strings,
 260         .event_cb = usb_hid_event_cb,
 261 };
 262
 263 /* Low-level usb-hid device initialization */
 264 static int usb_mouse_hw_init(void)
 265 {
 266         if (usb_deviceRegister(&usb_mouse) < 0)
 267                 return -1;
 268         LOG_INFO("usb-hid: registered new USB mouse device\n");
 269         return 0;
 270 }
 271
 272 /* Send a mouse event */
 273 void usbmouse_sendEvent(int8_t x, int8_t y, int8_t buttons)
 274 {
 275         report.x = x;
 276         report.y = y;
 277         report.buttons = buttons;
 278         usb_endpointWrite(USB_HID_REPORT_EP, &report, sizeof(report));
 279 }
 280
 281 /*
 282  * Initialize a USB HID device.
 283  *
 284  * TODO: support more than one device at the same time.
 285  */
 286 int usbmouse_init(UNUSED_ARG(int, unit))
 287 {
 288 #if CONFIG_KERN
 289         MOD_CHECK(proc);
 290 #endif
 291         usb_mouse_hw_init();
 292         while (!hid_mouse_configured)
 293                 cpu_relax();
 294         return 0;
 295 }