1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2001-2005 Edouard TISSERANT <edouard.tisserant@wanadoo.fr> 4 * Copyright (c) 2004-2005 Stephane VOLTZ <svoltz@numericable.fr> 5 * 6 * USB Acecad "Acecad Flair" tablet support 7 * 8 * Changelog: 9 * v3.2 - Added sysfs support 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/slab.h> 14 #include <linux/module.h> 15 #include <linux/usb/input.h> 16 17 MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>"); 18 MODULE_DESCRIPTION("USB Acecad Flair tablet driver"); 19 MODULE_LICENSE("GPL"); 20 21 #define USB_VENDOR_ID_ACECAD 0x0460 22 #define USB_DEVICE_ID_FLAIR 0x0004 23 #define USB_DEVICE_ID_302 0x0008 24 25 struct usb_acecad { 26 char name[128]; 27 char phys[64]; 28 struct usb_interface *intf; 29 struct input_dev *input; 30 struct urb *irq; 31 32 unsigned char *data; 33 dma_addr_t data_dma; 34 }; 35 36 static void usb_acecad_irq(struct urb *urb) 37 { 38 struct usb_acecad *acecad = urb->context; 39 unsigned char *data = acecad->data; 40 struct input_dev *dev = acecad->input; 41 struct usb_interface *intf = acecad->intf; 42 struct usb_device *udev = interface_to_usbdev(intf); 43 int prox, status; 44 45 switch (urb->status) { 46 case 0: 47 /* success */ 48 break; 49 case -ECONNRESET: 50 case -ENOENT: 51 case -ESHUTDOWN: 52 /* this urb is terminated, clean up */ 53 dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n", 54 __func__, urb->status); 55 return; 56 default: 57 dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n", 58 __func__, urb->status); 59 goto resubmit; 60 } 61 62 prox = (data[0] & 0x04) >> 2; 63 input_report_key(dev, BTN_TOOL_PEN, prox); 64 65 if (prox) { 66 int x = data[1] | (data[2] << 8); 67 int y = data[3] | (data[4] << 8); 68 /* Pressure should compute the same way for flair and 302 */ 69 int pressure = data[5] | (data[6] << 8); 70 int touch = data[0] & 0x01; 71 int stylus = (data[0] & 0x10) >> 4; 72 int stylus2 = (data[0] & 0x20) >> 5; 73 input_report_abs(dev, ABS_X, x); 74 input_report_abs(dev, ABS_Y, y); 75 input_report_abs(dev, ABS_PRESSURE, pressure); 76 input_report_key(dev, BTN_TOUCH, touch); 77 input_report_key(dev, BTN_STYLUS, stylus); 78 input_report_key(dev, BTN_STYLUS2, stylus2); 79 } 80 81 /* event termination */ 82 input_sync(dev); 83 84 resubmit: 85 status = usb_submit_urb(urb, GFP_ATOMIC); 86 if (status) 87 dev_err(&intf->dev, 88 "can't resubmit intr, %s-%s/input0, status %d\n", 89 udev->bus->bus_name, 90 udev->devpath, status); 91 } 92 93 static int usb_acecad_open(struct input_dev *dev) 94 { 95 struct usb_acecad *acecad = input_get_drvdata(dev); 96 97 acecad->irq->dev = interface_to_usbdev(acecad->intf); 98 if (usb_submit_urb(acecad->irq, GFP_KERNEL)) 99 return -EIO; 100 101 return 0; 102 } 103 104 static void usb_acecad_close(struct input_dev *dev) 105 { 106 struct usb_acecad *acecad = input_get_drvdata(dev); 107 108 usb_kill_urb(acecad->irq); 109 } 110 111 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id) 112 { 113 struct usb_device *dev = interface_to_usbdev(intf); 114 struct usb_host_interface *interface = intf->cur_altsetting; 115 struct usb_endpoint_descriptor *endpoint; 116 struct usb_acecad *acecad; 117 struct input_dev *input_dev; 118 int pipe, maxp; 119 int err; 120 121 if (interface->desc.bNumEndpoints != 1) 122 return -ENODEV; 123 124 endpoint = &interface->endpoint[0].desc; 125 126 if (!usb_endpoint_is_int_in(endpoint)) 127 return -ENODEV; 128 129 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); 130 maxp = usb_maxpacket(dev, pipe); 131 132 acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL); 133 input_dev = input_allocate_device(); 134 if (!acecad || !input_dev) { 135 err = -ENOMEM; 136 goto fail1; 137 } 138 139 acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma); 140 if (!acecad->data) { 141 err= -ENOMEM; 142 goto fail1; 143 } 144 145 acecad->irq = usb_alloc_urb(0, GFP_KERNEL); 146 if (!acecad->irq) { 147 err = -ENOMEM; 148 goto fail2; 149 } 150 151 acecad->intf = intf; 152 acecad->input = input_dev; 153 154 if (dev->manufacturer) 155 strscpy(acecad->name, dev->manufacturer, sizeof(acecad->name)); 156 157 if (dev->product) { 158 if (dev->manufacturer) 159 strlcat(acecad->name, " ", sizeof(acecad->name)); 160 strlcat(acecad->name, dev->product, sizeof(acecad->name)); 161 } 162 163 usb_make_path(dev, acecad->phys, sizeof(acecad->phys)); 164 strlcat(acecad->phys, "/input0", sizeof(acecad->phys)); 165 166 input_dev->name = acecad->name; 167 input_dev->phys = acecad->phys; 168 usb_to_input_id(dev, &input_dev->id); 169 input_dev->dev.parent = &intf->dev; 170 171 input_set_drvdata(input_dev, acecad); 172 173 input_dev->open = usb_acecad_open; 174 input_dev->close = usb_acecad_close; 175 176 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 177 input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) | 178 BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) | 179 BIT_MASK(BTN_STYLUS2); 180 181 switch (id->driver_info) { 182 case 0: 183 input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0); 184 input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0); 185 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0); 186 if (!strlen(acecad->name)) 187 snprintf(acecad->name, sizeof(acecad->name), 188 "USB Acecad Flair Tablet %04x:%04x", 189 le16_to_cpu(dev->descriptor.idVendor), 190 le16_to_cpu(dev->descriptor.idProduct)); 191 break; 192 193 case 1: 194 input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0); 195 input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0); 196 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0); 197 if (!strlen(acecad->name)) 198 snprintf(acecad->name, sizeof(acecad->name), 199 "USB Acecad 302 Tablet %04x:%04x", 200 le16_to_cpu(dev->descriptor.idVendor), 201 le16_to_cpu(dev->descriptor.idProduct)); 202 break; 203 } 204 205 usb_fill_int_urb(acecad->irq, dev, pipe, 206 acecad->data, maxp > 8 ? 8 : maxp, 207 usb_acecad_irq, acecad, endpoint->bInterval); 208 acecad->irq->transfer_dma = acecad->data_dma; 209 acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 210 211 err = input_register_device(acecad->input); 212 if (err) 213 goto fail3; 214 215 usb_set_intfdata(intf, acecad); 216 217 return 0; 218 219 fail3: usb_free_urb(acecad->irq); 220 fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma); 221 fail1: input_free_device(input_dev); 222 kfree(acecad); 223 return err; 224 } 225 226 static void usb_acecad_disconnect(struct usb_interface *intf) 227 { 228 struct usb_acecad *acecad = usb_get_intfdata(intf); 229 struct usb_device *udev = interface_to_usbdev(intf); 230 231 usb_set_intfdata(intf, NULL); 232 233 input_unregister_device(acecad->input); 234 usb_free_urb(acecad->irq); 235 usb_free_coherent(udev, 8, acecad->data, acecad->data_dma); 236 kfree(acecad); 237 } 238 239 static const struct usb_device_id usb_acecad_id_table[] = { 240 { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 }, 241 { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302), .driver_info = 1 }, 242 { } 243 }; 244 245 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table); 246 247 static struct usb_driver usb_acecad_driver = { 248 .name = "usb_acecad", 249 .probe = usb_acecad_probe, 250 .disconnect = usb_acecad_disconnect, 251 .id_table = usb_acecad_id_table, 252 }; 253 254 module_usb_driver(usb_acecad_driver); 255