xref: /openbmc/linux/drivers/input/tablet/acecad.c (revision 2d09ac95)
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 
usb_acecad_irq(struct urb * urb)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 
usb_acecad_open(struct input_dev * dev)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 
usb_acecad_close(struct input_dev * dev)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 
usb_acecad_probe(struct usb_interface * intf,const struct usb_device_id * id)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 
usb_acecad_disconnect(struct usb_interface * intf)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