1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 1999-2001 Vojtech Pavlik 4 * 5 * USB HIDBP Mouse support 6 */ 7 8 /* 9 * 10 * Should you need to contact me, the author, you can do so either by 11 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 12 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/slab.h> 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/usb/input.h> 20 #include <linux/hid.h> 21 22 /* for apple IDs */ 23 #ifdef CONFIG_USB_HID_MODULE 24 #include "../hid-ids.h" 25 #endif 26 27 /* 28 * Version Information 29 */ 30 #define DRIVER_VERSION "v1.6" 31 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>" 32 #define DRIVER_DESC "USB HID Boot Protocol mouse driver" 33 34 MODULE_AUTHOR(DRIVER_AUTHOR); 35 MODULE_DESCRIPTION(DRIVER_DESC); 36 MODULE_LICENSE("GPL"); 37 38 struct usb_mouse { 39 char name[128]; 40 char phys[64]; 41 struct usb_device *usbdev; 42 struct input_dev *dev; 43 struct urb *irq; 44 45 signed char *data; 46 dma_addr_t data_dma; 47 }; 48 49 static void usb_mouse_irq(struct urb *urb) 50 { 51 struct usb_mouse *mouse = urb->context; 52 signed char *data = mouse->data; 53 struct input_dev *dev = mouse->dev; 54 int status; 55 56 switch (urb->status) { 57 case 0: /* success */ 58 break; 59 case -ECONNRESET: /* unlink */ 60 case -ENOENT: 61 case -ESHUTDOWN: 62 return; 63 /* -EPIPE: should clear the halt */ 64 default: /* error */ 65 goto resubmit; 66 } 67 68 input_report_key(dev, BTN_LEFT, data[0] & 0x01); 69 input_report_key(dev, BTN_RIGHT, data[0] & 0x02); 70 input_report_key(dev, BTN_MIDDLE, data[0] & 0x04); 71 input_report_key(dev, BTN_SIDE, data[0] & 0x08); 72 input_report_key(dev, BTN_EXTRA, data[0] & 0x10); 73 74 input_report_rel(dev, REL_X, data[1]); 75 input_report_rel(dev, REL_Y, data[2]); 76 input_report_rel(dev, REL_WHEEL, data[3]); 77 78 input_sync(dev); 79 resubmit: 80 status = usb_submit_urb (urb, GFP_ATOMIC); 81 if (status) 82 dev_err(&mouse->usbdev->dev, 83 "can't resubmit intr, %s-%s/input0, status %d\n", 84 mouse->usbdev->bus->bus_name, 85 mouse->usbdev->devpath, status); 86 } 87 88 static int usb_mouse_open(struct input_dev *dev) 89 { 90 struct usb_mouse *mouse = input_get_drvdata(dev); 91 92 mouse->irq->dev = mouse->usbdev; 93 if (usb_submit_urb(mouse->irq, GFP_KERNEL)) 94 return -EIO; 95 96 return 0; 97 } 98 99 static void usb_mouse_close(struct input_dev *dev) 100 { 101 struct usb_mouse *mouse = input_get_drvdata(dev); 102 103 usb_kill_urb(mouse->irq); 104 } 105 106 static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id) 107 { 108 struct usb_device *dev = interface_to_usbdev(intf); 109 struct usb_host_interface *interface; 110 struct usb_endpoint_descriptor *endpoint; 111 struct usb_mouse *mouse; 112 struct input_dev *input_dev; 113 int pipe, maxp; 114 int error = -ENOMEM; 115 116 interface = intf->cur_altsetting; 117 118 if (interface->desc.bNumEndpoints != 1) 119 return -ENODEV; 120 121 endpoint = &interface->endpoint[0].desc; 122 if (!usb_endpoint_is_int_in(endpoint)) 123 return -ENODEV; 124 125 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); 126 maxp = usb_maxpacket(dev, pipe); 127 128 mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL); 129 input_dev = input_allocate_device(); 130 if (!mouse || !input_dev) 131 goto fail1; 132 133 mouse->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &mouse->data_dma); 134 if (!mouse->data) 135 goto fail1; 136 137 mouse->irq = usb_alloc_urb(0, GFP_KERNEL); 138 if (!mouse->irq) 139 goto fail2; 140 141 mouse->usbdev = dev; 142 mouse->dev = input_dev; 143 144 if (dev->manufacturer) 145 strscpy(mouse->name, dev->manufacturer, sizeof(mouse->name)); 146 147 if (dev->product) { 148 if (dev->manufacturer) 149 strlcat(mouse->name, " ", sizeof(mouse->name)); 150 strlcat(mouse->name, dev->product, sizeof(mouse->name)); 151 } 152 153 if (!strlen(mouse->name)) 154 snprintf(mouse->name, sizeof(mouse->name), 155 "USB HIDBP Mouse %04x:%04x", 156 le16_to_cpu(dev->descriptor.idVendor), 157 le16_to_cpu(dev->descriptor.idProduct)); 158 159 usb_make_path(dev, mouse->phys, sizeof(mouse->phys)); 160 strlcat(mouse->phys, "/input0", sizeof(mouse->phys)); 161 162 input_dev->name = mouse->name; 163 input_dev->phys = mouse->phys; 164 usb_to_input_id(dev, &input_dev->id); 165 input_dev->dev.parent = &intf->dev; 166 167 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 168 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 169 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 170 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 171 input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | 172 BIT_MASK(BTN_EXTRA); 173 input_dev->relbit[0] |= BIT_MASK(REL_WHEEL); 174 175 input_set_drvdata(input_dev, mouse); 176 177 input_dev->open = usb_mouse_open; 178 input_dev->close = usb_mouse_close; 179 180 usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data, 181 (maxp > 8 ? 8 : maxp), 182 usb_mouse_irq, mouse, endpoint->bInterval); 183 mouse->irq->transfer_dma = mouse->data_dma; 184 mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 185 186 error = input_register_device(mouse->dev); 187 if (error) 188 goto fail3; 189 190 usb_set_intfdata(intf, mouse); 191 return 0; 192 193 fail3: 194 usb_free_urb(mouse->irq); 195 fail2: 196 usb_free_coherent(dev, 8, mouse->data, mouse->data_dma); 197 fail1: 198 input_free_device(input_dev); 199 kfree(mouse); 200 return error; 201 } 202 203 static void usb_mouse_disconnect(struct usb_interface *intf) 204 { 205 struct usb_mouse *mouse = usb_get_intfdata (intf); 206 207 usb_set_intfdata(intf, NULL); 208 if (mouse) { 209 usb_kill_urb(mouse->irq); 210 input_unregister_device(mouse->dev); 211 usb_free_urb(mouse->irq); 212 usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma); 213 kfree(mouse); 214 } 215 } 216 217 static const struct usb_device_id usb_mouse_id_table[] = { 218 { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, 219 USB_INTERFACE_PROTOCOL_MOUSE) }, 220 { } /* Terminating entry */ 221 }; 222 223 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table); 224 225 static struct usb_driver usb_mouse_driver = { 226 .name = "usbmouse", 227 .probe = usb_mouse_probe, 228 .disconnect = usb_mouse_disconnect, 229 .id_table = usb_mouse_id_table, 230 }; 231 232 module_usb_driver(usb_mouse_driver); 233