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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2001-2005 Edouard TISSERANT <[email protected]>
4 * Copyright (c) 2004-2005 Stephane VOLTZ <[email protected]>
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
17MODULE_AUTHOR("Edouard TISSERANT <[email protected]>");
18MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
19MODULE_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
25struct 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
36static 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
84resubmit:
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
93static 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
104static 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
111static 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_obj(*acecad);
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
226static 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
239static 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
245MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
246
247static 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
254module_usb_driver(usb_acecad_driver);