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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 "radio-tea5777.h"
37
38#if defined(CONFIG_LEDS_CLASS) || \
39 (defined(CONFIG_LEDS_CLASS_MODULE) && defined(CONFIG_RADIO_SHARK2_MODULE))
40#define SHARK_USE_LEDS 1
41#endif
42
43MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
44MODULE_DESCRIPTION("Griffin radioSHARK2, USB radio receiver driver");
45MODULE_LICENSE("GPL");
46
47static int debug;
48module_param(debug, int, 0);
49MODULE_PARM_DESC(debug, "Debug level (0-1)");
50
51#define SHARK_IN_EP 0x83
52#define SHARK_OUT_EP 0x05
53
54#define TB_LEN 7
55#define DRV_NAME "radioshark2"
56
57#define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)
58
59enum { BLUE_LED, RED_LED, NO_LEDS };
60
61struct shark_device {
62 struct usb_device *usbdev;
63 struct v4l2_device v4l2_dev;
64 struct radio_tea5777 tea;
65
66#ifdef SHARK_USE_LEDS
67 struct work_struct led_work;
68 struct led_classdev leds[NO_LEDS];
69 char led_names[NO_LEDS][32];
70 atomic_t brightness[NO_LEDS];
71 unsigned long brightness_new;
72#endif
73
74 u8 *transfer_buffer;
75};
76
77static atomic_t shark_instance = ATOMIC_INIT(0);
78
79static int shark_write_reg(struct radio_tea5777 *tea, u64 reg)
80{
81 struct shark_device *shark = tea->private_data;
82 int i, res, actual_len;
83
84 memset(shark->transfer_buffer, 0, TB_LEN);
85 shark->transfer_buffer[0] = 0x81;
86 for (i = 0; i < 6; i++)
87 shark->transfer_buffer[i + 1] = (reg >> (40 - i * 8)) & 0xff;
88
89 v4l2_dbg(1, debug, tea->v4l2_dev, "shark2-write: %*ph\n",
90 7, shark->transfer_buffer);
91
92 res = usb_interrupt_msg(shark->usbdev,
93 usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
94 shark->transfer_buffer, TB_LEN,
95 &actual_len, 1000);
96 if (res < 0) {
97 v4l2_err(tea->v4l2_dev, "write error: %d\n", res);
98 return res;
99 }
100
101 return 0;
102}
103
104static int shark_read_reg(struct radio_tea5777 *tea, u32 *reg_ret)
105{
106 struct shark_device *shark = tea->private_data;
107 int i, res, actual_len;
108 u32 reg = 0;
109
110 memset(shark->transfer_buffer, 0, TB_LEN);
111 shark->transfer_buffer[0] = 0x82;
112 res = usb_interrupt_msg(shark->usbdev,
113 usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
114 shark->transfer_buffer, TB_LEN,
115 &actual_len, 1000);
116 if (res < 0) {
117 v4l2_err(tea->v4l2_dev, "request-read error: %d\n", res);
118 return res;
119 }
120
121 res = usb_interrupt_msg(shark->usbdev,
122 usb_rcvintpipe(shark->usbdev, SHARK_IN_EP),
123 shark->transfer_buffer, TB_LEN,
124 &actual_len, 1000);
125 if (res < 0) {
126 v4l2_err(tea->v4l2_dev, "read error: %d\n", res);
127 return res;
128 }
129
130 for (i = 0; i < 3; i++)
131 reg |= shark->transfer_buffer[i] << (16 - i * 8);
132
133 v4l2_dbg(1, debug, tea->v4l2_dev, "shark2-read: %*ph\n",
134 3, shark->transfer_buffer);
135
136 *reg_ret = reg;
137 return 0;
138}
139
140static const struct radio_tea5777_ops shark_tea_ops = {
141 .write_reg = shark_write_reg,
142 .read_reg = shark_read_reg,
143};
144
145#ifdef SHARK_USE_LEDS
146static void shark_led_work(struct work_struct *work)
147{
148 struct shark_device *shark =
149 container_of(work, struct shark_device, led_work);
150 int i, res, brightness, actual_len;
151
152 for (i = 0; i < 2; i++) {
153 if (!test_and_clear_bit(i, &shark->brightness_new))
154 continue;
155
156 brightness = atomic_read(&shark->brightness[i]);
157 memset(shark->transfer_buffer, 0, TB_LEN);
158 shark->transfer_buffer[0] = 0x83 + i;
159 shark->transfer_buffer[1] = brightness;
160 res = usb_interrupt_msg(shark->usbdev,
161 usb_sndintpipe(shark->usbdev,
162 SHARK_OUT_EP),
163 shark->transfer_buffer, TB_LEN,
164 &actual_len, 1000);
165 if (res < 0)
166 v4l2_err(&shark->v4l2_dev, "set LED %s error: %d\n",
167 shark->led_names[i], res);
168 }
169}
170
171static void shark_led_set_blue(struct led_classdev *led_cdev,
172 enum led_brightness value)
173{
174 struct shark_device *shark =
175 container_of(led_cdev, struct shark_device, leds[BLUE_LED]);
176
177 atomic_set(&shark->brightness[BLUE_LED], value);
178 set_bit(BLUE_LED, &shark->brightness_new);
179 schedule_work(&shark->led_work);
180}
181
182static void shark_led_set_red(struct led_classdev *led_cdev,
183 enum led_brightness value)
184{
185 struct shark_device *shark =
186 container_of(led_cdev, struct shark_device, leds[RED_LED]);
187
188 atomic_set(&shark->brightness[RED_LED], value);
189 set_bit(RED_LED, &shark->brightness_new);
190 schedule_work(&shark->led_work);
191}
192
193static const struct led_classdev shark_led_templates[NO_LEDS] = {
194 [BLUE_LED] = {
195 .name = "%s:blue:",
196 .brightness = LED_OFF,
197 .max_brightness = 127,
198 .brightness_set = shark_led_set_blue,
199 },
200 [RED_LED] = {
201 .name = "%s:red:",
202 .brightness = LED_OFF,
203 .max_brightness = 1,
204 .brightness_set = shark_led_set_red,
205 },
206};
207
208static int shark_register_leds(struct shark_device *shark, struct device *dev)
209{
210 int i, retval;
211
212 atomic_set(&shark->brightness[BLUE_LED], 127);
213 INIT_WORK(&shark->led_work, shark_led_work);
214 for (i = 0; i < NO_LEDS; i++) {
215 shark->leds[i] = shark_led_templates[i];
216 snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
217 shark->leds[i].name, shark->v4l2_dev.name);
218 shark->leds[i].name = shark->led_names[i];
219 retval = led_classdev_register(dev, &shark->leds[i]);
220 if (retval) {
221 v4l2_err(&shark->v4l2_dev,
222 "couldn't register led: %s\n",
223 shark->led_names[i]);
224 return retval;
225 }
226 }
227 return 0;
228}
229
230static void shark_unregister_leds(struct shark_device *shark)
231{
232 int i;
233
234 for (i = 0; i < NO_LEDS; i++)
235 led_classdev_unregister(&shark->leds[i]);
236
237 cancel_work_sync(&shark->led_work);
238}
239
240static inline void shark_resume_leds(struct shark_device *shark)
241{
242 int i;
243
244 for (i = 0; i < NO_LEDS; i++)
245 set_bit(i, &shark->brightness_new);
246
247 schedule_work(&shark->led_work);
248}
249#else
250static int shark_register_leds(struct shark_device *shark, struct device *dev)
251{
252 v4l2_warn(&shark->v4l2_dev,
253 "CONFIG_LEDS_CLASS not enabled, LED support disabled\n");
254 return 0;
255}
256static inline void shark_unregister_leds(struct shark_device *shark) { }
257static inline void shark_resume_leds(struct shark_device *shark) { }
258#endif
259
260static void usb_shark_disconnect(struct usb_interface *intf)
261{
262 struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
263 struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
264
265 mutex_lock(&shark->tea.mutex);
266 v4l2_device_disconnect(&shark->v4l2_dev);
267 radio_tea5777_exit(&shark->tea);
268 mutex_unlock(&shark->tea.mutex);
269
270 shark_unregister_leds(shark);
271
272 v4l2_device_put(&shark->v4l2_dev);
273}
274
275static void usb_shark_release(struct v4l2_device *v4l2_dev)
276{
277 struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
278
279 v4l2_device_unregister(&shark->v4l2_dev);
280 kfree(shark->transfer_buffer);
281 kfree(shark);
282}
283
284static int usb_shark_probe(struct usb_interface *intf,
285 const struct usb_device_id *id)
286{
287 struct shark_device *shark;
288 int retval = -ENOMEM;
289
290 shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
291 if (!shark)
292 return retval;
293
294 shark->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
295 if (!shark->transfer_buffer)
296 goto err_alloc_buffer;
297
298 v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);
299
300 retval = shark_register_leds(shark, &intf->dev);
301 if (retval)
302 goto err_reg_leds;
303
304 shark->v4l2_dev.release = usb_shark_release;
305 retval = v4l2_device_register(&intf->dev, &shark->v4l2_dev);
306 if (retval) {
307 v4l2_err(&shark->v4l2_dev, "couldn't register v4l2_device\n");
308 goto err_reg_dev;
309 }
310
311 shark->usbdev = interface_to_usbdev(intf);
312 shark->tea.v4l2_dev = &shark->v4l2_dev;
313 shark->tea.private_data = shark;
314 shark->tea.ops = &shark_tea_ops;
315 shark->tea.has_am = true;
316 shark->tea.write_before_read = true;
317 strlcpy(shark->tea.card, "Griffin radioSHARK2",
318 sizeof(shark->tea.card));
319 usb_make_path(shark->usbdev, shark->tea.bus_info,
320 sizeof(shark->tea.bus_info));
321
322 retval = radio_tea5777_init(&shark->tea, THIS_MODULE);
323 if (retval) {
324 v4l2_err(&shark->v4l2_dev, "couldn't init tea5777\n");
325 goto err_init_tea;
326 }
327
328 return 0;
329
330err_init_tea:
331 v4l2_device_unregister(&shark->v4l2_dev);
332err_reg_dev:
333 shark_unregister_leds(shark);
334err_reg_leds:
335 kfree(shark->transfer_buffer);
336err_alloc_buffer:
337 kfree(shark);
338
339 return retval;
340}
341
342#ifdef CONFIG_PM
343static int usb_shark_suspend(struct usb_interface *intf, pm_message_t message)
344{
345 return 0;
346}
347
348static int usb_shark_resume(struct usb_interface *intf)
349{
350 struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
351 struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
352 int ret;
353
354 mutex_lock(&shark->tea.mutex);
355 ret = radio_tea5777_set_freq(&shark->tea);
356 mutex_unlock(&shark->tea.mutex);
357
358 shark_resume_leds(shark);
359
360 return ret;
361}
362#endif
363
364
365static struct usb_device_id usb_shark_device_table[] = {
366 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
367 USB_DEVICE_ID_MATCH_INT_CLASS,
368 .idVendor = 0x077d,
369 .idProduct = 0x627a,
370 .bcdDevice_lo = 0x0010,
371 .bcdDevice_hi = 0x0010,
372 .bInterfaceClass = 3,
373 },
374 { }
375};
376MODULE_DEVICE_TABLE(usb, usb_shark_device_table);
377
378static struct usb_driver usb_shark_driver = {
379 .name = DRV_NAME,
380 .probe = usb_shark_probe,
381 .disconnect = usb_shark_disconnect,
382 .id_table = usb_shark_device_table,
383#ifdef CONFIG_PM
384 .suspend = usb_shark_suspend,
385 .resume = usb_shark_resume,
386 .reset_resume = usb_shark_resume,
387#endif
388};
389module_usb_driver(usb_shark_driver);
390
