/drivers/input/tablet/acecad.c

  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/*
 13 */
 14
 15#include <linux/kernel.h>
 16#include <linux/slab.h>
 17#include <linux/module.h>
 18#include <linux/usb/input.h>
 19
 20MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
 21MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
 22MODULE_LICENSE("GPL");
 23
 24#define USB_VENDOR_ID_ACECAD	0x0460
 25#define USB_DEVICE_ID_FLAIR	0x0004
 26#define USB_DEVICE_ID_302	0x0008
 27
 28struct usb_acecad {
 29	char name[128];
 30	char phys[64];
 31	struct usb_interface *intf;
 32	struct input_dev *input;
 33	struct urb *irq;
 34
 35	unsigned char *data;
 36	dma_addr_t data_dma;
 37};
 38
 39static void usb_acecad_irq(struct urb *urb)
 40{
 41	struct usb_acecad *acecad = urb->context;
 42	unsigned char *data = acecad->data;
 43	struct input_dev *dev = acecad->input;
 44	struct usb_interface *intf = acecad->intf;
 45	struct usb_device *udev = interface_to_usbdev(intf);
 46	int prox, status;
 47
 48	switch (urb->status) {
 49	case 0:
 50		/* success */
 51		break;
 52	case -ECONNRESET:
 53	case -ENOENT:
 54	case -ESHUTDOWN:
 55		/* this urb is terminated, clean up */
 56		dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
 57			__func__, urb->status);
 58		return;
 59	default:
 60		dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
 61			__func__, urb->status);
 62		goto resubmit;
 63	}
 64
 65	prox = (data[0] & 0x04) >> 2;
 66	input_report_key(dev, BTN_TOOL_PEN, prox);
 67
 68	if (prox) {
 69		int x = data[1] | (data[2] << 8);
 70		int y = data[3] | (data[4] << 8);
 71		/* Pressure should compute the same way for flair and 302 */
 72		int pressure = data[5] | (data[6] << 8);
 73		int touch = data[0] & 0x01;
 74		int stylus = (data[0] & 0x10) >> 4;
 75		int stylus2 = (data[0] & 0x20) >> 5;
 76		input_report_abs(dev, ABS_X, x);
 77		input_report_abs(dev, ABS_Y, y);
 78		input_report_abs(dev, ABS_PRESSURE, pressure);
 79		input_report_key(dev, BTN_TOUCH, touch);
 80		input_report_key(dev, BTN_STYLUS, stylus);
 81		input_report_key(dev, BTN_STYLUS2, stylus2);
 82	}
 83
 84	/* event termination */
 85	input_sync(dev);
 86
 87resubmit:
 88	status = usb_submit_urb(urb, GFP_ATOMIC);
 89	if (status)
 90		dev_err(&intf->dev,
 91			"can't resubmit intr, %s-%s/input0, status %d\n",
 92			udev->bus->bus_name,
 93			udev->devpath, status);
 94}
 95
 96static int usb_acecad_open(struct input_dev *dev)
 97{
 98	struct usb_acecad *acecad = input_get_drvdata(dev);
 99
100	acecad->irq->dev = interface_to_usbdev(acecad->intf);
101	if (usb_submit_urb(acecad->irq, GFP_KERNEL))
102		return -EIO;
103
104	return 0;
105}
106
107static void usb_acecad_close(struct input_dev *dev)
108{
109	struct usb_acecad *acecad = input_get_drvdata(dev);
110
111	usb_kill_urb(acecad->irq);
112}
113
114static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
115{
116	struct usb_device *dev = interface_to_usbdev(intf);
117	struct usb_host_interface *interface = intf->cur_altsetting;
118	struct usb_endpoint_descriptor *endpoint;
119	struct usb_acecad *acecad;
120	struct input_dev *input_dev;
121	int pipe, maxp;
122	int err;
123
124	if (interface->desc.bNumEndpoints != 1)
125		return -ENODEV;
126
127	endpoint = &interface->endpoint[0].desc;
128
129	if (!usb_endpoint_is_int_in(endpoint))
130		return -ENODEV;
131
132	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
133	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
134
135	acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
136	input_dev = input_allocate_device();
137	if (!acecad || !input_dev) {
138		err = -ENOMEM;
139		goto fail1;
140	}
141
142	acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
143	if (!acecad->data) {
144		err= -ENOMEM;
145		goto fail1;
146	}
147
148	acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
149	if (!acecad->irq) {
150		err = -ENOMEM;
151		goto fail2;
152	}
153
154	acecad->intf = intf;
155	acecad->input = input_dev;
156
157	if (dev->manufacturer)
158		strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
159
160	if (dev->product) {
161		if (dev->manufacturer)
162			strlcat(acecad->name, " ", sizeof(acecad->name));
163		strlcat(acecad->name, dev->product, sizeof(acecad->name));
164	}
165
166	usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
167	strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
168
169	input_dev->name = acecad->name;
170	input_dev->phys = acecad->phys;
171	usb_to_input_id(dev, &input_dev->id);
172	input_dev->dev.parent = &intf->dev;
173
174	input_set_drvdata(input_dev, acecad);
175
176	input_dev->open = usb_acecad_open;
177	input_dev->close = usb_acecad_close;
178
179	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
180	input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
181		BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
182		BIT_MASK(BTN_STYLUS2);
183
184	switch (id->driver_info) {
185	case 0:
186		input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
187		input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
188		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
189		if (!strlen(acecad->name))
190			snprintf(acecad->name, sizeof(acecad->name),
191				"USB Acecad Flair Tablet %04x:%04x",
192				le16_to_cpu(dev->descriptor.idVendor),
193				le16_to_cpu(dev->descriptor.idProduct));
194		break;
195
196	case 1:
197		input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
198		input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
199		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
200		if (!strlen(acecad->name))
201			snprintf(acecad->name, sizeof(acecad->name),
202				"USB Acecad 302 Tablet %04x:%04x",
203				le16_to_cpu(dev->descriptor.idVendor),
204				le16_to_cpu(dev->descriptor.idProduct));
205		break;
206	}
207
208	usb_fill_int_urb(acecad->irq, dev, pipe,
209			acecad->data, maxp > 8 ? 8 : maxp,
210			usb_acecad_irq, acecad, endpoint->bInterval);
211	acecad->irq->transfer_dma = acecad->data_dma;
212	acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
213
214	err = input_register_device(acecad->input);
215	if (err)
216		goto fail3;
217
218	usb_set_intfdata(intf, acecad);
219
220	return 0;
221
222 fail3:	usb_free_urb(acecad->irq);
223 fail2:	usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
224 fail1: input_free_device(input_dev);
225	kfree(acecad);
226	return err;
227}
228
229static void usb_acecad_disconnect(struct usb_interface *intf)
230{
231	struct usb_acecad *acecad = usb_get_intfdata(intf);
232	struct usb_device *udev = interface_to_usbdev(intf);
233
234	usb_set_intfdata(intf, NULL);
235
236	input_unregister_device(acecad->input);
237	usb_free_urb(acecad->irq);
238	usb_free_coherent(udev, 8, acecad->data, acecad->data_dma);
239	kfree(acecad);
240}
241
242static const struct usb_device_id usb_acecad_id_table[] = {
243	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
244	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),	 .driver_info = 1 },
245	{ }
246};
247
248MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
249
250static struct usb_driver usb_acecad_driver = {
251	.name =		"usb_acecad",
252	.probe =	usb_acecad_probe,
253	.disconnect =	usb_acecad_disconnect,
254	.id_table =	usb_acecad_id_table,
255};
256
257module_usb_driver(usb_acecad_driver);