bertos/drv/usbmouse.c

   1 /**
   2  * \file
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   4  * This file is part of BeRTOS.
   5  *
   6  * Bertos is free software; you can redistribute it and/or modify
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   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,
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  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
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  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
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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 #include <drv/usb_endpoint.h>
  54
  55 #include "drv/usb_hid.h"
  56 #include "drv/usbmouse.h"
  57
  58 /*
  59  * HID device configuration (usb-mouse)
  60  */
  61 #define USB_HID_VENDOR_ID       0xffff /* custom */
  62 #define USB_HID_PRODUCT_ID      0x0000
  63
  64 #define USB_HID_INTERFACES      1
  65 #define USB_HID_ENDPOINTS       1
  66
  67 #define USB_STRING_MANUFACTURER 1
  68 #define USB_STRING_PRODUCT      2
  69
  70 #define USB_HID_REPORT_EP       (USB_DIR_IN | USB_MOUSE_EP_REPORT)
  71
  72 static UsbDeviceDesc usb_hid_device_descriptor =
  73 {
  74         .bLength = sizeof(usb_hid_device_descriptor),
  75         .bDescriptorType = USB_DT_DEVICE,
  76         .bcdUSB = 0x100,
  77         .bDeviceClass = 0,
  78         .bDeviceSubClass = 0,
  79         .bDeviceProtocol = 0,
  80         .idVendor = USB_HID_VENDOR_ID,
  81         .idProduct = USB_HID_PRODUCT_ID,
  82         .bcdDevice = 0,
  83         .iManufacturer = USB_STRING_MANUFACTURER,
  84         .iProduct = USB_STRING_PRODUCT,
  85         .iSerialNumber = 0,
  86         .bNumConfigurations = 1,
  87 };
  88
  89 static const UsbConfigDesc usb_hid_config_descriptor =
  90 {
  91         .bLength = sizeof(usb_hid_config_descriptor),
  92         .bDescriptorType = USB_DT_CONFIG,
  93         .bNumInterfaces = USB_HID_INTERFACES,
  94         .bConfigurationValue = 1,
  95         .iConfiguration = 0,
  96         .bmAttributes = USB_CONFIG_ATT_ONE,
  97         .bMaxPower = 50, /* 100 mA */
  98 };
  99
 100 static const UsbInterfaceDesc usb_hid_interface_descriptor =
 101 {
 102         .bLength = sizeof(usb_hid_interface_descriptor),
 103         .bDescriptorType = USB_DT_INTERFACE,
 104         .bInterfaceNumber = 0,
 105         .bAlternateSetting = 0,
 106         .bNumEndpoints = USB_HID_ENDPOINTS,
 107         .bInterfaceClass = USB_CLASS_HID,
 108         .bInterfaceSubClass = USB_INTERFACE_SUBCLASS_BOOT,
 109         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE,
 110         .iInterface = 0,
 111 };
 112
 113 static const uint8_t hid_report_descriptor[] =
 114 {
 115         0x05, 0x01, // Usage Page (Generic Desktop)
 116         0x09, 0x02, // Usage (Mouse)
 117         0xA1, 0x01, // Collection (Application)
 118         0x09, 0x01, // Usage (Pointer)
 119         0xA1, 0x00, // Collection (Physical)
 120         0x05, 0x09, // Usage Page (Buttons)
 121         0x19, 0x01, // Usage Minimum (1)
 122         0x29, 0x03, // Usage Maximum (3)
 123         0x15, 0x00, // Logical Minimum (0)
 124         0x25, 0x01, // Logical Maximum (1)
 125         0x95, 0x03, // Report Count (3)
 126         0x75, 0x01, // Report Size (1)
 127         0x81, 0x02, // Input (Data, Variable, Absolute)
 128         0x95, 0x01, // Report Count (1)
 129         0x75, 0x05, // Report Size (5)
 130         0x81, 0x01, // Input (03=Logitech, 01=Hid spec:Constant)
 131         0x05, 0x01, // Usage Page (Generic Desktop)
 132         0x09, 0x30, // Usage (X)
 133         0x09, 0x31, // Usage (Y)
 134         0x09, 0x38, // Usage (Logitech:_)
 135         0x15, 0x81, // Logical Minimum (-127)
 136         0x25, 0x7F, // Logical Maximum (127)
 137         0x75, 0x08, // Report Size (8)
 138         0x95, 0x02, // Report Count (Logitech=3, Hid spec =2)
 139         0x81, 0x06, // Input (Data, Variable, Relative)
 140         0xC0,   // End Collection
 141         0xC0    // End Collection
 142 };
 143
 144 static const usb_HidDesc usb_hid_descriptor =
 145 {
 146         .bLength = sizeof(usb_hid_descriptor),
 147         .bDescriptorType = HID_DT_HID,
 148         .bcdHID = usb_cpu_to_le16((uint16_t)0x0110),
 149         .bCountryCode = 0,
 150         .bNumDescriptors = 1,
 151         .bDescriptorHidType = HID_DT_REPORT,
 152         .wDescriptorLength =
 153                 usb_cpu_to_le16((uint16_t)sizeof(hid_report_descriptor)),
 154 };
 155
 156 static const UsbEndpointDesc usb_hid_ep_descriptor =
 157 {
 158         .bLength = sizeof(usb_hid_ep_descriptor),
 159         .bDescriptorType = USB_DT_ENDPOINT,
 160         .bEndpointAddress = USB_HID_REPORT_EP,
 161         .bmAttributes = USB_ENDPOINT_XFER_INT,
 162         .wMaxPacketSize = usb_cpu_to_le16((uint16_t)4),
 163         .bInterval = 10, /* resolution in ms */
 164 };
 165
 166 static const UsbDescHeader *usb_hid_config[] =
 167 {
 168         (const UsbDescHeader *)&usb_hid_config_descriptor,
 169         (const UsbDescHeader *)&usb_hid_interface_descriptor,
 170         (const UsbDescHeader *)&usb_hid_descriptor,
 171         (const UsbDescHeader *)&usb_hid_ep_descriptor,
 172         NULL,
 173 };
 174
 175 static const DEFINE_USB_STRING(language_str, "\x09\x04"); // Language ID: en_US
 176 static const DEFINE_USB_STRING(manufacturer_str,
 177                 USB_STRING("B", "e", "R", "T", "O", "S"));
 178 static const DEFINE_USB_STRING(product_str,
 179                 USB_STRING("U", "S", "B", " ", "M", "o", "u", "s", "e"));
 180
 181 static const UsbStringDesc *usb_hid_strings[] =
 182 {
 183         (const UsbStringDesc *)&language_str,
 184         (const UsbStringDesc *)&manufacturer_str,
 185         (const UsbStringDesc *)&product_str,
 186         NULL,
 187 };
 188
 189 typedef struct mouse_report
 190 {
 191         uint8_t buttons;
 192         int8_t x;
 193         int8_t y;
 194 } PACKED mouse_report_t;
 195
 196 static mouse_report_t report;
 197
 198 static bool hid_mouse_configured;
 199
 200 static void usb_hid_event_cb(UsbCtrlRequest *ctrl)
 201 {
 202         uint16_t value = usb_le16_to_cpu(ctrl->wValue);
 203         uint16_t index = usb_le16_to_cpu(ctrl->wIndex);
 204         uint16_t length = usb_le16_to_cpu(ctrl->wLength);
 205         uint8_t type = ctrl->mRequestType;
 206         uint8_t request = ctrl->bRequest;
 207
 208         LOG_INFO("%s: s 0x%02x 0x%02x 0x%04x 0x%04x 0x%04x\n",
 209                 __func__, type, request, value, index, length);
 210         switch (ctrl->bRequest)
 211         {
 212         case USB_REQ_GET_DESCRIPTOR:
 213                 switch (value >> 8)
 214                 {
 215                 case HID_DT_HID:
 216                         LOG_INFO("%s: HID_DT_HID\n", __func__);
 217                         usb_endpointWrite(USB_DIR_IN | 0,
 218                                         &usb_hid_descriptor,
 219                                         sizeof(usb_hid_descriptor));
 220                         break;
 221                 case HID_DT_REPORT:
 222                         LOG_INFO("%s: HID_DT_REPORT\n", __func__);
 223                         usb_endpointWrite(USB_DIR_IN | 0,
 224                                         &hid_report_descriptor,
 225                                         sizeof(hid_report_descriptor));
 226                         hid_mouse_configured = true;
 227                         break;
 228                 }
 229                 break;
 230         case HID_REQ_GET_REPORT:
 231                 LOG_INFO("%s: HID_REQ_GET_REPORT\n", __func__);
 232                 break;
 233         case HID_REQ_SET_REPORT:
 234                 LOG_INFO("%s: HID_REQ_SET_REPORT\n", __func__);
 235                 break;
 236         case HID_REQ_GET_IDLE:
 237                 LOG_INFO("%s: HID_REQ_GET_IDLE\n", __func__);
 238                 break;
 239         case HID_REQ_SET_IDLE:
 240                 LOG_INFO("%s: HID_REQ_SET_IDLE\n", __func__);
 241                 usb_endpointWrite(USB_DIR_IN | 0, NULL, 0);
 242                 break;
 243         case HID_REQ_GET_PROTOCOL:
 244                 LOG_INFO("%s: HID_REQ_GET_PROTOCOL\n", __func__);
 245                 break;
 246         case HID_REQ_SET_PROTOCOL:
 247                 LOG_INFO("%s: HID_REQ_SET_PROTOCOL\n", __func__);
 248                 break;
 249         default:
 250                 LOG_ERR("%s: unknown request: 0x%02x\n",
 251                         __func__, ctrl->bRequest);
 252                 break;
 253         }
 254 }
 255
 256 /* Global usb-mouse descriptor that identifies the usb-mouse device */
 257 static UsbDevice usb_mouse = {
 258         .device = &usb_hid_device_descriptor,
 259         .config = usb_hid_config,
 260         .strings = usb_hid_strings,
 261         .event_cb = usb_hid_event_cb,
 262 };
 263
 264 /* Low-level usb-hid device initialization */
 265 static int usb_mouse_hw_init(void)
 266 {
 267         if (usb_deviceRegister(&usb_mouse) < 0)
 268                 return -1;
 269         LOG_INFO("usb-hid: registered new USB mouse device\n");
 270         return 0;
 271 }
 272
 273 /* Send a mouse event */
 274 void usbmouse_sendEvent(int8_t x, int8_t y, int8_t buttons)
 275 {
 276         report.x = x;
 277         report.y = y;
 278         report.buttons = buttons;
 279         usb_endpointWrite(USB_HID_REPORT_EP, &report, sizeof(report));
 280 }
 281
 282 /*
 283  * Initialize a USB HID device.
 284  *
 285  * TODO: support more than one device at the same time.
 286  */
 287 int usbmouse_init(UNUSED_ARG(int, unit))
 288 {
 289 #if CONFIG_KERN
 290         MOD_CHECK(proc);
 291 #endif
 292         usb_mouse_hw_init();
 293         while (!hid_mouse_configured)
 294                 cpu_relax();
 295         return 0;
 296 }