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
17MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
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(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
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);
255