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14#include <linux/device.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/usb.h>
18#include <linux/usb/input.h>
19#include <media/rc-core.h>
20
21#define DRIVER_DESC "IgorPlug-USB IR Receiver"
22#define DRIVER_NAME "igorplugusb"
23
24#define HEADERLEN 3
25#define BUFLEN 36
26#define MAX_PACKET (HEADERLEN + BUFLEN)
27
28#define SET_INFRABUFFER_EMPTY 1
29#define GET_INFRACODE 2
30
31
32struct igorplugusb {
33 struct rc_dev *rc;
34 struct device *dev;
35
36 struct urb *urb;
37 struct usb_ctrlrequest request;
38
39 struct timer_list timer;
40
41 uint8_t buf_in[MAX_PACKET];
42
43 char phys[64];
44};
45
46static void igorplugusb_cmd(struct igorplugusb *ir, int cmd);
47
48static void igorplugusb_irdata(struct igorplugusb *ir, unsigned len)
49{
50 struct ir_raw_event rawir = {};
51 unsigned i, start, overflow;
52
53 dev_dbg(ir->dev, "irdata: %*ph (len=%u)", len, ir->buf_in, len);
54
55
56
57
58
59
60
61 overflow = ir->buf_in[2];
62 i = start = overflow + HEADERLEN;
63
64 if (start >= len) {
65 dev_err(ir->dev, "receive overflow invalid: %u", overflow);
66 } else {
67 if (overflow > 0)
68 dev_warn(ir->dev, "receive overflow, at least %u lost",
69 overflow);
70
71 do {
72 rawir.duration = ir->buf_in[i] * 85;
73 rawir.pulse = i & 1;
74
75 ir_raw_event_store_with_filter(ir->rc, &rawir);
76
77 if (++i == len)
78 i = HEADERLEN;
79 } while (i != start);
80
81
82 rawir.duration = ir->rc->timeout;
83 rawir.pulse = false;
84 ir_raw_event_store_with_filter(ir->rc, &rawir);
85
86 ir_raw_event_handle(ir->rc);
87 }
88
89 igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
90}
91
92static void igorplugusb_callback(struct urb *urb)
93{
94 struct usb_ctrlrequest *req;
95 struct igorplugusb *ir = urb->context;
96
97 req = (struct usb_ctrlrequest *)urb->setup_packet;
98
99 switch (urb->status) {
100 case 0:
101 if (req->bRequest == GET_INFRACODE &&
102 urb->actual_length > HEADERLEN)
103 igorplugusb_irdata(ir, urb->actual_length);
104 else
105 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(50));
106 break;
107 case -EPROTO:
108 case -ECONNRESET:
109 case -ENOENT:
110 case -ESHUTDOWN:
111 usb_unlink_urb(urb);
112 return;
113 default:
114 dev_warn(ir->dev, "Error: urb status = %d\n", urb->status);
115 igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
116 break;
117 }
118}
119
120static void igorplugusb_cmd(struct igorplugusb *ir, int cmd)
121{
122 int ret;
123
124 ir->request.bRequest = cmd;
125 ir->urb->transfer_flags = 0;
126 ret = usb_submit_urb(ir->urb, GFP_ATOMIC);
127 if (ret)
128 dev_err(ir->dev, "submit urb failed: %d", ret);
129}
130
131static void igorplugusb_timer(struct timer_list *t)
132{
133 struct igorplugusb *ir = from_timer(ir, t, timer);
134
135 igorplugusb_cmd(ir, GET_INFRACODE);
136}
137
138static int igorplugusb_probe(struct usb_interface *intf,
139 const struct usb_device_id *id)
140{
141 struct usb_device *udev;
142 struct usb_host_interface *idesc;
143 struct usb_endpoint_descriptor *ep;
144 struct igorplugusb *ir;
145 struct rc_dev *rc;
146 int ret = -ENOMEM;
147
148 udev = interface_to_usbdev(intf);
149 idesc = intf->cur_altsetting;
150
151 if (idesc->desc.bNumEndpoints != 1) {
152 dev_err(&intf->dev, "incorrect number of endpoints");
153 return -ENODEV;
154 }
155
156 ep = &idesc->endpoint[0].desc;
157 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_control(ep)) {
158 dev_err(&intf->dev, "endpoint incorrect");
159 return -ENODEV;
160 }
161
162 ir = devm_kzalloc(&intf->dev, sizeof(*ir), GFP_KERNEL);
163 if (!ir)
164 return -ENOMEM;
165
166 ir->dev = &intf->dev;
167
168 timer_setup(&ir->timer, igorplugusb_timer, 0);
169
170 ir->request.bRequest = GET_INFRACODE;
171 ir->request.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
172 ir->request.wLength = cpu_to_le16(sizeof(ir->buf_in));
173
174 ir->urb = usb_alloc_urb(0, GFP_KERNEL);
175 if (!ir->urb)
176 goto fail;
177
178 usb_fill_control_urb(ir->urb, udev,
179 usb_rcvctrlpipe(udev, 0), (uint8_t *)&ir->request,
180 ir->buf_in, sizeof(ir->buf_in), igorplugusb_callback, ir);
181
182 usb_make_path(udev, ir->phys, sizeof(ir->phys));
183
184 rc = rc_allocate_device(RC_DRIVER_IR_RAW);
185 if (!rc)
186 goto fail;
187
188 rc->device_name = DRIVER_DESC;
189 rc->input_phys = ir->phys;
190 usb_to_input_id(udev, &rc->input_id);
191 rc->dev.parent = &intf->dev;
192
193
194
195
196 rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER &
197 ~(RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | RC_PROTO_BIT_NEC32 |
198 RC_PROTO_BIT_RC6_6A_20 | RC_PROTO_BIT_RC6_6A_24 |
199 RC_PROTO_BIT_RC6_6A_32 | RC_PROTO_BIT_RC6_MCE |
200 RC_PROTO_BIT_SONY20 | RC_PROTO_BIT_SANYO);
201
202 rc->priv = ir;
203 rc->driver_name = DRIVER_NAME;
204 rc->map_name = RC_MAP_HAUPPAUGE;
205 rc->timeout = MS_TO_US(100);
206 rc->rx_resolution = 85;
207
208 ir->rc = rc;
209 ret = rc_register_device(rc);
210 if (ret) {
211 dev_err(&intf->dev, "failed to register rc device: %d", ret);
212 goto fail;
213 }
214
215 usb_set_intfdata(intf, ir);
216
217 igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
218
219 return 0;
220fail:
221 rc_free_device(ir->rc);
222 usb_free_urb(ir->urb);
223 del_timer(&ir->timer);
224
225 return ret;
226}
227
228static void igorplugusb_disconnect(struct usb_interface *intf)
229{
230 struct igorplugusb *ir = usb_get_intfdata(intf);
231
232 rc_unregister_device(ir->rc);
233 del_timer_sync(&ir->timer);
234 usb_set_intfdata(intf, NULL);
235 usb_kill_urb(ir->urb);
236 usb_free_urb(ir->urb);
237}
238
239static const struct usb_device_id igorplugusb_table[] = {
240
241 { USB_DEVICE(0x03eb, 0x0002) },
242
243 { USB_DEVICE(0x03eb, 0x21fe) },
244
245 { }
246};
247
248static struct usb_driver igorplugusb_driver = {
249 .name = DRIVER_NAME,
250 .probe = igorplugusb_probe,
251 .disconnect = igorplugusb_disconnect,
252 .id_table = igorplugusb_table
253};
254
255module_usb_driver(igorplugusb_driver);
256
257MODULE_DESCRIPTION(DRIVER_DESC);
258MODULE_AUTHOR("Sean Young <sean@mess.org>");
259MODULE_LICENSE("GPL");
260MODULE_DEVICE_TABLE(usb, igorplugusb_table);
261
