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31#include <linux/kernel.h>
32#include <linux/slab.h>
33#include <linux/module.h>
34#include <linux/init.h>
35#include <linux/spinlock.h>
36#include <linux/usb/input.h>
37
38#define POWERMATE_VENDOR 0x077d
39#define POWERMATE_PRODUCT_NEW 0x0410
40#define POWERMATE_PRODUCT_OLD 0x04AA
41
42#define CONTOUR_VENDOR 0x05f3
43#define CONTOUR_JOG 0x0240
44
45
46#define SET_STATIC_BRIGHTNESS 0x01
47#define SET_PULSE_ASLEEP 0x02
48#define SET_PULSE_AWAKE 0x03
49#define SET_PULSE_MODE 0x04
50
51
52#define UPDATE_STATIC_BRIGHTNESS (1<<0)
53#define UPDATE_PULSE_ASLEEP (1<<1)
54#define UPDATE_PULSE_AWAKE (1<<2)
55#define UPDATE_PULSE_MODE (1<<3)
56
57
58
59
60#define POWERMATE_PAYLOAD_SIZE_MAX 6
61#define POWERMATE_PAYLOAD_SIZE_MIN 3
62struct powermate_device {
63 signed char *data;
64 dma_addr_t data_dma;
65 struct urb *irq, *config;
66 struct usb_ctrlrequest *configcr;
67 dma_addr_t configcr_dma;
68 struct usb_device *udev;
69 struct input_dev *input;
70 spinlock_t lock;
71 int static_brightness;
72 int pulse_speed;
73 int pulse_table;
74 int pulse_asleep;
75 int pulse_awake;
76 int requires_update;
77 char phys[64];
78};
79
80static char pm_name_powermate[] = "Griffin PowerMate";
81static char pm_name_soundknob[] = "Griffin SoundKnob";
82
83static void powermate_config_complete(struct urb *urb);
84
85
86static void powermate_irq(struct urb *urb)
87{
88 struct powermate_device *pm = urb->context;
89 int retval;
90
91 switch (urb->status) {
92 case 0:
93
94 break;
95 case -ECONNRESET:
96 case -ENOENT:
97 case -ESHUTDOWN:
98
99 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
100 return;
101 default:
102 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
103 goto exit;
104 }
105
106
107 input_report_key(pm->input, BTN_0, pm->data[0] & 0x01);
108 input_report_rel(pm->input, REL_DIAL, pm->data[1]);
109 input_sync(pm->input);
110
111exit:
112 retval = usb_submit_urb (urb, GFP_ATOMIC);
113 if (retval)
114 err ("%s - usb_submit_urb failed with result %d",
115 __func__, retval);
116}
117
118
119static void powermate_sync_state(struct powermate_device *pm)
120{
121 if (pm->requires_update == 0)
122 return;
123 if (pm->config->status == -EINPROGRESS)
124 return;
125
126 if (pm->requires_update & UPDATE_PULSE_ASLEEP){
127 pm->configcr->wValue = cpu_to_le16( SET_PULSE_ASLEEP );
128 pm->configcr->wIndex = cpu_to_le16( pm->pulse_asleep ? 1 : 0 );
129 pm->requires_update &= ~UPDATE_PULSE_ASLEEP;
130 }else if (pm->requires_update & UPDATE_PULSE_AWAKE){
131 pm->configcr->wValue = cpu_to_le16( SET_PULSE_AWAKE );
132 pm->configcr->wIndex = cpu_to_le16( pm->pulse_awake ? 1 : 0 );
133 pm->requires_update &= ~UPDATE_PULSE_AWAKE;
134 }else if (pm->requires_update & UPDATE_PULSE_MODE){
135 int op, arg;
136
137
138
139
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142
143
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150
151
152
153 if (pm->pulse_speed < 255) {
154 op = 0;
155 arg = 255 - pm->pulse_speed;
156 } else if (pm->pulse_speed > 255) {
157 op = 2;
158 arg = pm->pulse_speed - 255;
159 } else {
160 op = 1;
161 arg = 0;
162 }
163 pm->configcr->wValue = cpu_to_le16( (pm->pulse_table << 8) | SET_PULSE_MODE );
164 pm->configcr->wIndex = cpu_to_le16( (arg << 8) | op );
165 pm->requires_update &= ~UPDATE_PULSE_MODE;
166 } else if (pm->requires_update & UPDATE_STATIC_BRIGHTNESS) {
167 pm->configcr->wValue = cpu_to_le16( SET_STATIC_BRIGHTNESS );
168 pm->configcr->wIndex = cpu_to_le16( pm->static_brightness );
169 pm->requires_update &= ~UPDATE_STATIC_BRIGHTNESS;
170 } else {
171 printk(KERN_ERR "powermate: unknown update required");
172 pm->requires_update = 0;
173 return;
174 }
175
176
177
178 pm->configcr->bRequestType = 0x41;
179 pm->configcr->bRequest = 0x01;
180 pm->configcr->wLength = 0;
181
182 usb_fill_control_urb(pm->config, pm->udev, usb_sndctrlpipe(pm->udev, 0),
183 (void *) pm->configcr, NULL, 0,
184 powermate_config_complete, pm);
185 pm->config->setup_dma = pm->configcr_dma;
186 pm->config->transfer_flags |= URB_NO_SETUP_DMA_MAP;
187
188 if (usb_submit_urb(pm->config, GFP_ATOMIC))
189 printk(KERN_ERR "powermate: usb_submit_urb(config) failed");
190}
191
192
193static void powermate_config_complete(struct urb *urb)
194{
195 struct powermate_device *pm = urb->context;
196 unsigned long flags;
197
198 if (urb->status)
199 printk(KERN_ERR "powermate: config urb returned %d\n", urb->status);
200
201 spin_lock_irqsave(&pm->lock, flags);
202 powermate_sync_state(pm);
203 spin_unlock_irqrestore(&pm->lock, flags);
204}
205
206
207static void powermate_pulse_led(struct powermate_device *pm, int static_brightness, int pulse_speed,
208 int pulse_table, int pulse_asleep, int pulse_awake)
209{
210 unsigned long flags;
211
212 if (pulse_speed < 0)
213 pulse_speed = 0;
214 if (pulse_table < 0)
215 pulse_table = 0;
216 if (pulse_speed > 510)
217 pulse_speed = 510;
218 if (pulse_table > 2)
219 pulse_table = 2;
220
221 pulse_asleep = !!pulse_asleep;
222 pulse_awake = !!pulse_awake;
223
224
225 spin_lock_irqsave(&pm->lock, flags);
226
227
228 if (static_brightness != pm->static_brightness) {
229 pm->static_brightness = static_brightness;
230 pm->requires_update |= UPDATE_STATIC_BRIGHTNESS;
231 }
232 if (pulse_asleep != pm->pulse_asleep) {
233 pm->pulse_asleep = pulse_asleep;
234 pm->requires_update |= (UPDATE_PULSE_ASLEEP | UPDATE_STATIC_BRIGHTNESS);
235 }
236 if (pulse_awake != pm->pulse_awake) {
237 pm->pulse_awake = pulse_awake;
238 pm->requires_update |= (UPDATE_PULSE_AWAKE | UPDATE_STATIC_BRIGHTNESS);
239 }
240 if (pulse_speed != pm->pulse_speed || pulse_table != pm->pulse_table) {
241 pm->pulse_speed = pulse_speed;
242 pm->pulse_table = pulse_table;
243 pm->requires_update |= UPDATE_PULSE_MODE;
244 }
245
246 powermate_sync_state(pm);
247
248 spin_unlock_irqrestore(&pm->lock, flags);
249}
250
251
252static int powermate_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int _value)
253{
254 unsigned int command = (unsigned int)_value;
255 struct powermate_device *pm = input_get_drvdata(dev);
256
257 if (type == EV_MSC && code == MSC_PULSELED){
258
259
260
261
262
263
264
265 int static_brightness = command & 0xFF;
266 int pulse_speed = (command >> 8) & 0x1FF;
267 int pulse_table = (command >> 17) & 0x3;
268 int pulse_asleep = (command >> 19) & 0x1;
269 int pulse_awake = (command >> 20) & 0x1;
270
271 powermate_pulse_led(pm, static_brightness, pulse_speed, pulse_table, pulse_asleep, pulse_awake);
272 }
273
274 return 0;
275}
276
277static int powermate_alloc_buffers(struct usb_device *udev, struct powermate_device *pm)
278{
279 pm->data = usb_buffer_alloc(udev, POWERMATE_PAYLOAD_SIZE_MAX,
280 GFP_ATOMIC, &pm->data_dma);
281 if (!pm->data)
282 return -1;
283
284 pm->configcr = usb_buffer_alloc(udev, sizeof(*(pm->configcr)),
285 GFP_ATOMIC, &pm->configcr_dma);
286 if (!pm->configcr)
287 return -1;
288
289 return 0;
290}
291
292static void powermate_free_buffers(struct usb_device *udev, struct powermate_device *pm)
293{
294 usb_buffer_free(udev, POWERMATE_PAYLOAD_SIZE_MAX,
295 pm->data, pm->data_dma);
296 usb_buffer_free(udev, sizeof(*(pm->configcr)),
297 pm->configcr, pm->configcr_dma);
298}
299
300
301static int powermate_probe(struct usb_interface *intf, const struct usb_device_id *id)
302{
303 struct usb_device *udev = interface_to_usbdev (intf);
304 struct usb_host_interface *interface;
305 struct usb_endpoint_descriptor *endpoint;
306 struct powermate_device *pm;
307 struct input_dev *input_dev;
308 int pipe, maxp;
309 int error = -ENOMEM;
310
311 interface = intf->cur_altsetting;
312 endpoint = &interface->endpoint[0].desc;
313 if (!usb_endpoint_is_int_in(endpoint))
314 return -EIO;
315
316 usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
317 0x0a, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
318 0, interface->desc.bInterfaceNumber, NULL, 0,
319 USB_CTRL_SET_TIMEOUT);
320
321 pm = kzalloc(sizeof(struct powermate_device), GFP_KERNEL);
322 input_dev = input_allocate_device();
323 if (!pm || !input_dev)
324 goto fail1;
325
326 if (powermate_alloc_buffers(udev, pm))
327 goto fail2;
328
329 pm->irq = usb_alloc_urb(0, GFP_KERNEL);
330 if (!pm->irq)
331 goto fail2;
332
333 pm->config = usb_alloc_urb(0, GFP_KERNEL);
334 if (!pm->config)
335 goto fail3;
336
337 pm->udev = udev;
338 pm->input = input_dev;
339
340 usb_make_path(udev, pm->phys, sizeof(pm->phys));
341 strlcpy(pm->phys, "/input0", sizeof(pm->phys));
342
343 spin_lock_init(&pm->lock);
344
345 switch (le16_to_cpu(udev->descriptor.idProduct)) {
346 case POWERMATE_PRODUCT_NEW:
347 input_dev->name = pm_name_powermate;
348 break;
349 case POWERMATE_PRODUCT_OLD:
350 input_dev->name = pm_name_soundknob;
351 break;
352 default:
353 input_dev->name = pm_name_soundknob;
354 printk(KERN_WARNING "powermate: unknown product id %04x\n",
355 le16_to_cpu(udev->descriptor.idProduct));
356 }
357
358 input_dev->phys = pm->phys;
359 usb_to_input_id(udev, &input_dev->id);
360 input_dev->dev.parent = &intf->dev;
361
362 input_set_drvdata(input_dev, pm);
363
364 input_dev->event = powermate_input_event;
365
366 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) |
367 BIT_MASK(EV_MSC);
368 input_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0);
369 input_dev->relbit[BIT_WORD(REL_DIAL)] = BIT_MASK(REL_DIAL);
370 input_dev->mscbit[BIT_WORD(MSC_PULSELED)] = BIT_MASK(MSC_PULSELED);
371
372
373 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
374 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
375
376 if (maxp < POWERMATE_PAYLOAD_SIZE_MIN || maxp > POWERMATE_PAYLOAD_SIZE_MAX) {
377 printk(KERN_WARNING "powermate: Expected payload of %d--%d bytes, found %d bytes!\n",
378 POWERMATE_PAYLOAD_SIZE_MIN, POWERMATE_PAYLOAD_SIZE_MAX, maxp);
379 maxp = POWERMATE_PAYLOAD_SIZE_MAX;
380 }
381
382 usb_fill_int_urb(pm->irq, udev, pipe, pm->data,
383 maxp, powermate_irq,
384 pm, endpoint->bInterval);
385 pm->irq->transfer_dma = pm->data_dma;
386 pm->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
387
388
389 if (usb_submit_urb(pm->irq, GFP_KERNEL)) {
390 error = -EIO;
391 goto fail4;
392 }
393
394 error = input_register_device(pm->input);
395 if (error)
396 goto fail5;
397
398
399
400 pm->requires_update = UPDATE_PULSE_ASLEEP | UPDATE_PULSE_AWAKE | UPDATE_PULSE_MODE | UPDATE_STATIC_BRIGHTNESS;
401 powermate_pulse_led(pm, 0x80, 255, 0, 1, 0);
402
403 usb_set_intfdata(intf, pm);
404 return 0;
405
406 fail5: usb_kill_urb(pm->irq);
407 fail4: usb_free_urb(pm->config);
408 fail3: usb_free_urb(pm->irq);
409 fail2: powermate_free_buffers(udev, pm);
410 fail1: input_free_device(input_dev);
411 kfree(pm);
412 return error;
413}
414
415
416static void powermate_disconnect(struct usb_interface *intf)
417{
418 struct powermate_device *pm = usb_get_intfdata (intf);
419
420 usb_set_intfdata(intf, NULL);
421 if (pm) {
422 pm->requires_update = 0;
423 usb_kill_urb(pm->irq);
424 input_unregister_device(pm->input);
425 usb_free_urb(pm->irq);
426 usb_free_urb(pm->config);
427 powermate_free_buffers(interface_to_usbdev(intf), pm);
428
429 kfree(pm);
430 }
431}
432
433static struct usb_device_id powermate_devices [] = {
434 { USB_DEVICE(POWERMATE_VENDOR, POWERMATE_PRODUCT_NEW) },
435 { USB_DEVICE(POWERMATE_VENDOR, POWERMATE_PRODUCT_OLD) },
436 { USB_DEVICE(CONTOUR_VENDOR, CONTOUR_JOG) },
437 { }
438};
439
440MODULE_DEVICE_TABLE (usb, powermate_devices);
441
442static struct usb_driver powermate_driver = {
443 .name = "powermate",
444 .probe = powermate_probe,
445 .disconnect = powermate_disconnect,
446 .id_table = powermate_devices,
447};
448
449static int __init powermate_init(void)
450{
451 return usb_register(&powermate_driver);
452}
453
454static void __exit powermate_cleanup(void)
455{
456 usb_deregister(&powermate_driver);
457}
458
459module_init(powermate_init);
460module_exit(powermate_cleanup);
461
462MODULE_AUTHOR( "William R Sowerbutts" );
463MODULE_DESCRIPTION( "Griffin Technology, Inc PowerMate driver" );
464MODULE_LICENSE("GPL");
465