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28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/leds.h>
31#include <linux/module.h>
32#include <linux/slab.h>
33#include <linux/usb.h>
34#include <linux/workqueue.h>
35#include <media/v4l2-device.h>
36#include <media/drv-intf/tea575x.h>
37
38#if defined(CONFIG_LEDS_CLASS) || \
39 (defined(CONFIG_LEDS_CLASS_MODULE) && defined(CONFIG_RADIO_SHARK_MODULE))
40#define SHARK_USE_LEDS 1
41#endif
42
43
44
45
46MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
47MODULE_DESCRIPTION("Griffin radioSHARK, USB radio receiver driver");
48MODULE_LICENSE("GPL");
49
50#define SHARK_IN_EP 0x83
51#define SHARK_OUT_EP 0x05
52
53#define TEA575X_BIT_MONO (1<<22)
54#define TEA575X_BIT_BAND_MASK (3<<20)
55#define TEA575X_BIT_BAND_FM (0<<20)
56
57#define TB_LEN 6
58#define DRV_NAME "radioshark"
59
60#define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)
61
62
63enum { BLUE_LED, BLUE_PULSE_LED, RED_LED, NO_LEDS, BLUE_IS_PULSE };
64
65struct shark_device {
66 struct usb_device *usbdev;
67 struct v4l2_device v4l2_dev;
68 struct snd_tea575x tea;
69
70#ifdef SHARK_USE_LEDS
71 struct work_struct led_work;
72 struct led_classdev leds[NO_LEDS];
73 char led_names[NO_LEDS][32];
74 atomic_t brightness[NO_LEDS];
75 unsigned long brightness_new;
76#endif
77
78 u8 *transfer_buffer;
79 u32 last_val;
80};
81
82static atomic_t shark_instance = ATOMIC_INIT(0);
83
84static void shark_write_val(struct snd_tea575x *tea, u32 val)
85{
86 struct shark_device *shark = tea->private_data;
87 int i, res, actual_len;
88
89
90 if (shark->last_val == val)
91 return;
92
93 memset(shark->transfer_buffer, 0, TB_LEN);
94 shark->transfer_buffer[0] = 0xc0;
95 for (i = 0; i < 4; i++)
96 shark->transfer_buffer[i] |= (val >> (24 - i * 8)) & 0xff;
97
98 res = usb_interrupt_msg(shark->usbdev,
99 usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
100 shark->transfer_buffer, TB_LEN,
101 &actual_len, 1000);
102 if (res >= 0)
103 shark->last_val = val;
104 else
105 v4l2_err(&shark->v4l2_dev, "set-freq error: %d\n", res);
106}
107
108static u32 shark_read_val(struct snd_tea575x *tea)
109{
110 struct shark_device *shark = tea->private_data;
111 int i, res, actual_len;
112 u32 val = 0;
113
114 memset(shark->transfer_buffer, 0, TB_LEN);
115 shark->transfer_buffer[0] = 0x80;
116 res = usb_interrupt_msg(shark->usbdev,
117 usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
118 shark->transfer_buffer, TB_LEN,
119 &actual_len, 1000);
120 if (res < 0) {
121 v4l2_err(&shark->v4l2_dev, "request-status error: %d\n", res);
122 return shark->last_val;
123 }
124
125 res = usb_interrupt_msg(shark->usbdev,
126 usb_rcvintpipe(shark->usbdev, SHARK_IN_EP),
127 shark->transfer_buffer, TB_LEN,
128 &actual_len, 1000);
129 if (res < 0) {
130 v4l2_err(&shark->v4l2_dev, "get-status error: %d\n", res);
131 return shark->last_val;
132 }
133
134 for (i = 0; i < 4; i++)
135 val |= shark->transfer_buffer[i] << (24 - i * 8);
136
137 shark->last_val = val;
138
139
140
141
142
143
144 if (((val & TEA575X_BIT_BAND_MASK) == TEA575X_BIT_BAND_FM) &&
145 !(val & TEA575X_BIT_MONO))
146 shark->tea.stereo = true;
147 else
148 shark->tea.stereo = false;
149
150 return val;
151}
152
153static const struct snd_tea575x_ops shark_tea_ops = {
154 .write_val = shark_write_val,
155 .read_val = shark_read_val,
156};
157
158#ifdef SHARK_USE_LEDS
159static void shark_led_work(struct work_struct *work)
160{
161 struct shark_device *shark =
162 container_of(work, struct shark_device, led_work);
163 int i, res, brightness, actual_len;
164
165 for (i = 0; i < 3; i++) {
166 if (!test_and_clear_bit(i, &shark->brightness_new))
167 continue;
168
169 brightness = atomic_read(&shark->brightness[i]);
170 memset(shark->transfer_buffer, 0, TB_LEN);
171 if (i != RED_LED) {
172 shark->transfer_buffer[0] = 0xA0 + i;
173 shark->transfer_buffer[1] = brightness;
174 } else
175 shark->transfer_buffer[0] = brightness ? 0xA9 : 0xA8;
176 res = usb_interrupt_msg(shark->usbdev,
177 usb_sndintpipe(shark->usbdev, 0x05),
178 shark->transfer_buffer, TB_LEN,
179 &actual_len, 1000);
180 if (res < 0)
181 v4l2_err(&shark->v4l2_dev, "set LED %s error: %d\n",
182 shark->led_names[i], res);
183 }
184}
185
186static void shark_led_set_blue(struct led_classdev *led_cdev,
187 enum led_brightness value)
188{
189 struct shark_device *shark =
190 container_of(led_cdev, struct shark_device, leds[BLUE_LED]);
191
192 atomic_set(&shark->brightness[BLUE_LED], value);
193 set_bit(BLUE_LED, &shark->brightness_new);
194 clear_bit(BLUE_IS_PULSE, &shark->brightness_new);
195 schedule_work(&shark->led_work);
196}
197
198static void shark_led_set_blue_pulse(struct led_classdev *led_cdev,
199 enum led_brightness value)
200{
201 struct shark_device *shark = container_of(led_cdev,
202 struct shark_device, leds[BLUE_PULSE_LED]);
203
204 atomic_set(&shark->brightness[BLUE_PULSE_LED], 256 - value);
205 set_bit(BLUE_PULSE_LED, &shark->brightness_new);
206 set_bit(BLUE_IS_PULSE, &shark->brightness_new);
207 schedule_work(&shark->led_work);
208}
209
210static void shark_led_set_red(struct led_classdev *led_cdev,
211 enum led_brightness value)
212{
213 struct shark_device *shark =
214 container_of(led_cdev, struct shark_device, leds[RED_LED]);
215
216 atomic_set(&shark->brightness[RED_LED], value);
217 set_bit(RED_LED, &shark->brightness_new);
218 schedule_work(&shark->led_work);
219}
220
221static const struct led_classdev shark_led_templates[NO_LEDS] = {
222 [BLUE_LED] = {
223 .name = "%s:blue:",
224 .brightness = LED_OFF,
225 .max_brightness = 127,
226 .brightness_set = shark_led_set_blue,
227 },
228 [BLUE_PULSE_LED] = {
229 .name = "%s:blue-pulse:",
230 .brightness = LED_OFF,
231 .max_brightness = 255,
232 .brightness_set = shark_led_set_blue_pulse,
233 },
234 [RED_LED] = {
235 .name = "%s:red:",
236 .brightness = LED_OFF,
237 .max_brightness = 1,
238 .brightness_set = shark_led_set_red,
239 },
240};
241
242static int shark_register_leds(struct shark_device *shark, struct device *dev)
243{
244 int i, retval;
245
246 atomic_set(&shark->brightness[BLUE_LED], 127);
247 INIT_WORK(&shark->led_work, shark_led_work);
248 for (i = 0; i < NO_LEDS; i++) {
249 shark->leds[i] = shark_led_templates[i];
250 snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
251 shark->leds[i].name, shark->v4l2_dev.name);
252 shark->leds[i].name = shark->led_names[i];
253 retval = led_classdev_register(dev, &shark->leds[i]);
254 if (retval) {
255 v4l2_err(&shark->v4l2_dev,
256 "couldn't register led: %s\n",
257 shark->led_names[i]);
258 return retval;
259 }
260 }
261 return 0;
262}
263
264static void shark_unregister_leds(struct shark_device *shark)
265{
266 int i;
267
268 for (i = 0; i < NO_LEDS; i++)
269 led_classdev_unregister(&shark->leds[i]);
270
271 cancel_work_sync(&shark->led_work);
272}
273
274static inline void shark_resume_leds(struct shark_device *shark)
275{
276 if (test_bit(BLUE_IS_PULSE, &shark->brightness_new))
277 set_bit(BLUE_PULSE_LED, &shark->brightness_new);
278 else
279 set_bit(BLUE_LED, &shark->brightness_new);
280 set_bit(RED_LED, &shark->brightness_new);
281 schedule_work(&shark->led_work);
282}
283#else
284static int shark_register_leds(struct shark_device *shark, struct device *dev)
285{
286 v4l2_warn(&shark->v4l2_dev,
287 "CONFIG_LEDS_CLASS not enabled, LED support disabled\n");
288 return 0;
289}
290static inline void shark_unregister_leds(struct shark_device *shark) { }
291static inline void shark_resume_leds(struct shark_device *shark) { }
292#endif
293
294static void usb_shark_disconnect(struct usb_interface *intf)
295{
296 struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
297 struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
298
299 mutex_lock(&shark->tea.mutex);
300 v4l2_device_disconnect(&shark->v4l2_dev);
301 snd_tea575x_exit(&shark->tea);
302 mutex_unlock(&shark->tea.mutex);
303
304 shark_unregister_leds(shark);
305
306 v4l2_device_put(&shark->v4l2_dev);
307}
308
309static void usb_shark_release(struct v4l2_device *v4l2_dev)
310{
311 struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
312
313 v4l2_device_unregister(&shark->v4l2_dev);
314 kfree(shark->transfer_buffer);
315 kfree(shark);
316}
317
318static int usb_shark_probe(struct usb_interface *intf,
319 const struct usb_device_id *id)
320{
321 struct shark_device *shark;
322 int retval = -ENOMEM;
323
324 shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
325 if (!shark)
326 return retval;
327
328 shark->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
329 if (!shark->transfer_buffer)
330 goto err_alloc_buffer;
331
332 v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);
333
334 retval = shark_register_leds(shark, &intf->dev);
335 if (retval)
336 goto err_reg_leds;
337
338 shark->v4l2_dev.release = usb_shark_release;
339 retval = v4l2_device_register(&intf->dev, &shark->v4l2_dev);
340 if (retval) {
341 v4l2_err(&shark->v4l2_dev, "couldn't register v4l2_device\n");
342 goto err_reg_dev;
343 }
344
345 shark->usbdev = interface_to_usbdev(intf);
346 shark->tea.v4l2_dev = &shark->v4l2_dev;
347 shark->tea.private_data = shark;
348 shark->tea.radio_nr = -1;
349 shark->tea.ops = &shark_tea_ops;
350 shark->tea.cannot_mute = true;
351 shark->tea.has_am = true;
352 strlcpy(shark->tea.card, "Griffin radioSHARK",
353 sizeof(shark->tea.card));
354 usb_make_path(shark->usbdev, shark->tea.bus_info,
355 sizeof(shark->tea.bus_info));
356
357 retval = snd_tea575x_init(&shark->tea, THIS_MODULE);
358 if (retval) {
359 v4l2_err(&shark->v4l2_dev, "couldn't init tea5757\n");
360 goto err_init_tea;
361 }
362
363 return 0;
364
365err_init_tea:
366 v4l2_device_unregister(&shark->v4l2_dev);
367err_reg_dev:
368 shark_unregister_leds(shark);
369err_reg_leds:
370 kfree(shark->transfer_buffer);
371err_alloc_buffer:
372 kfree(shark);
373
374 return retval;
375}
376
377#ifdef CONFIG_PM
378static int usb_shark_suspend(struct usb_interface *intf, pm_message_t message)
379{
380 return 0;
381}
382
383static int usb_shark_resume(struct usb_interface *intf)
384{
385 struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
386 struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
387
388 mutex_lock(&shark->tea.mutex);
389 snd_tea575x_set_freq(&shark->tea);
390 mutex_unlock(&shark->tea.mutex);
391
392 shark_resume_leds(shark);
393
394 return 0;
395}
396#endif
397
398
399static struct usb_device_id usb_shark_device_table[] = {
400 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
401 USB_DEVICE_ID_MATCH_INT_CLASS,
402 .idVendor = 0x077d,
403 .idProduct = 0x627a,
404 .bcdDevice_lo = 0x0001,
405 .bcdDevice_hi = 0x0001,
406 .bInterfaceClass = 3,
407 },
408 { }
409};
410MODULE_DEVICE_TABLE(usb, usb_shark_device_table);
411
412static struct usb_driver usb_shark_driver = {
413 .name = DRV_NAME,
414 .probe = usb_shark_probe,
415 .disconnect = usb_shark_disconnect,
416 .id_table = usb_shark_device_table,
417#ifdef CONFIG_PM
418 .suspend = usb_shark_suspend,
419 .resume = usb_shark_resume,
420 .reset_resume = usb_shark_resume,
421#endif
422};
423module_usb_driver(usb_shark_driver);
424
