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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
51 break;
52 case -ECONNRESET:
53 case -ENOENT:
54 case -ESHUTDOWN:
55
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
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
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);
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);
258
