1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Simple driver for Texas Instruments LM3630A Backlight driver chip
4 * Copyright (C) 2012 Texas Instruments
5 */
6 #include <linux/module.h>
7 #include <linux/slab.h>
8 #include <linux/i2c.h>
9 #include <linux/backlight.h>
10 #include <linux/err.h>
11 #include <linux/delay.h>
12 #include <linux/uaccess.h>
13 #include <linux/interrupt.h>
14 #include <linux/regmap.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/pwm.h>
17 #include <linux/platform_data/lm3630a_bl.h>
18
19 #define REG_CTRL 0x00
20 #define REG_BOOST 0x02
21 #define REG_CONFIG 0x01
22 #define REG_BRT_A 0x03
23 #define REG_BRT_B 0x04
24 #define REG_I_A 0x05
25 #define REG_I_B 0x06
26 #define REG_INT_STATUS 0x09
27 #define REG_INT_EN 0x0A
28 #define REG_FAULT 0x0B
29 #define REG_PWM_OUTLOW 0x12
30 #define REG_PWM_OUTHIGH 0x13
31 #define REG_FILTER_STRENGTH 0x50
32 #define REG_MAX 0x50
33
34 #define INT_DEBOUNCE_MSEC 10
35
36 #define LM3630A_BANK_0 0
37 #define LM3630A_BANK_1 1
38
39 #define LM3630A_NUM_SINKS 2
40 #define LM3630A_SINK_0 0
41 #define LM3630A_SINK_1 1
42
43 struct lm3630a_chip {
44 struct device *dev;
45 struct delayed_work work;
46
47 int irq;
48 struct workqueue_struct *irqthread;
49 struct lm3630a_platform_data *pdata;
50 struct backlight_device *bleda;
51 struct backlight_device *bledb;
52 struct gpio_desc *enable_gpio;
53 struct regmap *regmap;
54 struct pwm_device *pwmd;
55 struct pwm_state pwmd_state;
56 };
57
58 /* i2c access */
lm3630a_read(struct lm3630a_chip * pchip,unsigned int reg)59 static int lm3630a_read(struct lm3630a_chip *pchip, unsigned int reg)
60 {
61 int rval;
62 unsigned int reg_val;
63
64 rval = regmap_read(pchip->regmap, reg, ®_val);
65 if (rval < 0)
66 return rval;
67 return reg_val & 0xFF;
68 }
69
lm3630a_write(struct lm3630a_chip * pchip,unsigned int reg,unsigned int data)70 static int lm3630a_write(struct lm3630a_chip *pchip,
71 unsigned int reg, unsigned int data)
72 {
73 return regmap_write(pchip->regmap, reg, data);
74 }
75
lm3630a_update(struct lm3630a_chip * pchip,unsigned int reg,unsigned int mask,unsigned int data)76 static int lm3630a_update(struct lm3630a_chip *pchip,
77 unsigned int reg, unsigned int mask,
78 unsigned int data)
79 {
80 return regmap_update_bits(pchip->regmap, reg, mask, data);
81 }
82
83 /* initialize chip */
lm3630a_chip_init(struct lm3630a_chip * pchip)84 static int lm3630a_chip_init(struct lm3630a_chip *pchip)
85 {
86 int rval;
87 struct lm3630a_platform_data *pdata = pchip->pdata;
88
89 usleep_range(1000, 2000);
90 /* set Filter Strength Register */
91 rval = lm3630a_write(pchip, REG_FILTER_STRENGTH, 0x03);
92 /* set Cofig. register */
93 rval |= lm3630a_update(pchip, REG_CONFIG, 0x07, pdata->pwm_ctrl);
94 /* set boost control */
95 rval |= lm3630a_write(pchip, REG_BOOST, 0x38);
96 /* set current A */
97 rval |= lm3630a_update(pchip, REG_I_A, 0x1F, 0x1F);
98 /* set current B */
99 rval |= lm3630a_write(pchip, REG_I_B, 0x1F);
100 /* set control */
101 rval |= lm3630a_update(pchip, REG_CTRL, 0x14, pdata->leda_ctrl);
102 rval |= lm3630a_update(pchip, REG_CTRL, 0x0B, pdata->ledb_ctrl);
103 usleep_range(1000, 2000);
104 /* set brightness A and B */
105 rval |= lm3630a_write(pchip, REG_BRT_A, pdata->leda_init_brt);
106 rval |= lm3630a_write(pchip, REG_BRT_B, pdata->ledb_init_brt);
107
108 if (rval < 0)
109 dev_err(pchip->dev, "i2c failed to access register\n");
110 return rval;
111 }
112
113 /* interrupt handling */
lm3630a_delayed_func(struct work_struct * work)114 static void lm3630a_delayed_func(struct work_struct *work)
115 {
116 int rval;
117 struct lm3630a_chip *pchip;
118
119 pchip = container_of(work, struct lm3630a_chip, work.work);
120
121 rval = lm3630a_read(pchip, REG_INT_STATUS);
122 if (rval < 0) {
123 dev_err(pchip->dev,
124 "i2c failed to access REG_INT_STATUS Register\n");
125 return;
126 }
127
128 dev_info(pchip->dev, "REG_INT_STATUS Register is 0x%x\n", rval);
129 }
130
lm3630a_isr_func(int irq,void * chip)131 static irqreturn_t lm3630a_isr_func(int irq, void *chip)
132 {
133 int rval;
134 struct lm3630a_chip *pchip = chip;
135 unsigned long delay = msecs_to_jiffies(INT_DEBOUNCE_MSEC);
136
137 queue_delayed_work(pchip->irqthread, &pchip->work, delay);
138
139 rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
140 if (rval < 0) {
141 dev_err(pchip->dev, "i2c failed to access register\n");
142 return IRQ_NONE;
143 }
144 return IRQ_HANDLED;
145 }
146
lm3630a_intr_config(struct lm3630a_chip * pchip)147 static int lm3630a_intr_config(struct lm3630a_chip *pchip)
148 {
149 int rval;
150
151 rval = lm3630a_write(pchip, REG_INT_EN, 0x87);
152 if (rval < 0)
153 return rval;
154
155 INIT_DELAYED_WORK(&pchip->work, lm3630a_delayed_func);
156 pchip->irqthread = create_singlethread_workqueue("lm3630a-irqthd");
157 if (!pchip->irqthread) {
158 dev_err(pchip->dev, "create irq thread fail\n");
159 return -ENOMEM;
160 }
161 if (request_threaded_irq
162 (pchip->irq, NULL, lm3630a_isr_func,
163 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lm3630a_irq", pchip)) {
164 dev_err(pchip->dev, "request threaded irq fail\n");
165 destroy_workqueue(pchip->irqthread);
166 return -ENOMEM;
167 }
168 return rval;
169 }
170
lm3630a_pwm_ctrl(struct lm3630a_chip * pchip,int br,int br_max)171 static int lm3630a_pwm_ctrl(struct lm3630a_chip *pchip, int br, int br_max)
172 {
173 int err;
174
175 pchip->pwmd_state.period = pchip->pdata->pwm_period;
176
177 err = pwm_set_relative_duty_cycle(&pchip->pwmd_state, br, br_max);
178 if (err)
179 return err;
180
181 pchip->pwmd_state.enabled = pchip->pwmd_state.duty_cycle ? true : false;
182
183 return pwm_apply_state(pchip->pwmd, &pchip->pwmd_state);
184 }
185
186 /* update and get brightness */
lm3630a_bank_a_update_status(struct backlight_device * bl)187 static int lm3630a_bank_a_update_status(struct backlight_device *bl)
188 {
189 int ret;
190 struct lm3630a_chip *pchip = bl_get_data(bl);
191 enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
192
193 /* pwm control */
194 if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0)
195 return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
196 bl->props.max_brightness);
197
198 /* disable sleep */
199 ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
200 if (ret < 0)
201 goto out_i2c_err;
202 usleep_range(1000, 2000);
203 /* minimum brightness is 0x04 */
204 ret = lm3630a_write(pchip, REG_BRT_A, bl->props.brightness);
205
206 if (backlight_is_blank(bl) || (backlight_get_brightness(bl) < 0x4))
207 /* turn the string off */
208 ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0);
209 else
210 ret |= lm3630a_update(pchip, REG_CTRL,
211 LM3630A_LEDA_ENABLE, LM3630A_LEDA_ENABLE);
212 if (ret < 0)
213 goto out_i2c_err;
214 return 0;
215
216 out_i2c_err:
217 dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
218 return ret;
219 }
220
lm3630a_bank_a_get_brightness(struct backlight_device * bl)221 static int lm3630a_bank_a_get_brightness(struct backlight_device *bl)
222 {
223 int brightness, rval;
224 struct lm3630a_chip *pchip = bl_get_data(bl);
225 enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
226
227 if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) {
228 rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
229 if (rval < 0)
230 goto out_i2c_err;
231 brightness = (rval & 0x01) << 8;
232 rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
233 if (rval < 0)
234 goto out_i2c_err;
235 brightness |= rval;
236 goto out;
237 }
238
239 /* disable sleep */
240 rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
241 if (rval < 0)
242 goto out_i2c_err;
243 usleep_range(1000, 2000);
244 rval = lm3630a_read(pchip, REG_BRT_A);
245 if (rval < 0)
246 goto out_i2c_err;
247 brightness = rval;
248
249 out:
250 bl->props.brightness = brightness;
251 return bl->props.brightness;
252 out_i2c_err:
253 dev_err(pchip->dev, "i2c failed to access register\n");
254 return 0;
255 }
256
257 static const struct backlight_ops lm3630a_bank_a_ops = {
258 .options = BL_CORE_SUSPENDRESUME,
259 .update_status = lm3630a_bank_a_update_status,
260 .get_brightness = lm3630a_bank_a_get_brightness,
261 };
262
263 /* update and get brightness */
lm3630a_bank_b_update_status(struct backlight_device * bl)264 static int lm3630a_bank_b_update_status(struct backlight_device *bl)
265 {
266 int ret;
267 struct lm3630a_chip *pchip = bl_get_data(bl);
268 enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
269
270 /* pwm control */
271 if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0)
272 return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
273 bl->props.max_brightness);
274
275 /* disable sleep */
276 ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
277 if (ret < 0)
278 goto out_i2c_err;
279 usleep_range(1000, 2000);
280 /* minimum brightness is 0x04 */
281 ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness);
282
283 if (backlight_is_blank(bl) || (backlight_get_brightness(bl) < 0x4))
284 /* turn the string off */
285 ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDB_ENABLE, 0);
286 else
287 ret |= lm3630a_update(pchip, REG_CTRL,
288 LM3630A_LEDB_ENABLE, LM3630A_LEDB_ENABLE);
289 if (ret < 0)
290 goto out_i2c_err;
291 return 0;
292
293 out_i2c_err:
294 dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
295 return ret;
296 }
297
lm3630a_bank_b_get_brightness(struct backlight_device * bl)298 static int lm3630a_bank_b_get_brightness(struct backlight_device *bl)
299 {
300 int brightness, rval;
301 struct lm3630a_chip *pchip = bl_get_data(bl);
302 enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
303
304 if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) {
305 rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
306 if (rval < 0)
307 goto out_i2c_err;
308 brightness = (rval & 0x01) << 8;
309 rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
310 if (rval < 0)
311 goto out_i2c_err;
312 brightness |= rval;
313 goto out;
314 }
315
316 /* disable sleep */
317 rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
318 if (rval < 0)
319 goto out_i2c_err;
320 usleep_range(1000, 2000);
321 rval = lm3630a_read(pchip, REG_BRT_B);
322 if (rval < 0)
323 goto out_i2c_err;
324 brightness = rval;
325
326 out:
327 bl->props.brightness = brightness;
328 return bl->props.brightness;
329 out_i2c_err:
330 dev_err(pchip->dev, "i2c failed to access register\n");
331 return 0;
332 }
333
334 static const struct backlight_ops lm3630a_bank_b_ops = {
335 .options = BL_CORE_SUSPENDRESUME,
336 .update_status = lm3630a_bank_b_update_status,
337 .get_brightness = lm3630a_bank_b_get_brightness,
338 };
339
lm3630a_backlight_register(struct lm3630a_chip * pchip)340 static int lm3630a_backlight_register(struct lm3630a_chip *pchip)
341 {
342 struct lm3630a_platform_data *pdata = pchip->pdata;
343 struct backlight_properties props;
344 const char *label;
345
346 props.type = BACKLIGHT_RAW;
347 if (pdata->leda_ctrl != LM3630A_LEDA_DISABLE) {
348 props.brightness = pdata->leda_init_brt;
349 props.max_brightness = pdata->leda_max_brt;
350 label = pdata->leda_label ? pdata->leda_label : "lm3630a_leda";
351 pchip->bleda =
352 devm_backlight_device_register(pchip->dev, label,
353 pchip->dev, pchip,
354 &lm3630a_bank_a_ops, &props);
355 if (IS_ERR(pchip->bleda))
356 return PTR_ERR(pchip->bleda);
357 }
358
359 if ((pdata->ledb_ctrl != LM3630A_LEDB_DISABLE) &&
360 (pdata->ledb_ctrl != LM3630A_LEDB_ON_A)) {
361 props.brightness = pdata->ledb_init_brt;
362 props.max_brightness = pdata->ledb_max_brt;
363 label = pdata->ledb_label ? pdata->ledb_label : "lm3630a_ledb";
364 pchip->bledb =
365 devm_backlight_device_register(pchip->dev, label,
366 pchip->dev, pchip,
367 &lm3630a_bank_b_ops, &props);
368 if (IS_ERR(pchip->bledb))
369 return PTR_ERR(pchip->bledb);
370 }
371 return 0;
372 }
373
374 static const struct regmap_config lm3630a_regmap = {
375 .reg_bits = 8,
376 .val_bits = 8,
377 .max_register = REG_MAX,
378 };
379
lm3630a_parse_led_sources(struct fwnode_handle * node,int default_led_sources)380 static int lm3630a_parse_led_sources(struct fwnode_handle *node,
381 int default_led_sources)
382 {
383 u32 sources[LM3630A_NUM_SINKS];
384 int ret, num_sources, i;
385
386 num_sources = fwnode_property_count_u32(node, "led-sources");
387 if (num_sources < 0)
388 return default_led_sources;
389 else if (num_sources > ARRAY_SIZE(sources))
390 return -EINVAL;
391
392 ret = fwnode_property_read_u32_array(node, "led-sources", sources,
393 num_sources);
394 if (ret)
395 return ret;
396
397 for (i = 0; i < num_sources; i++) {
398 if (sources[i] != LM3630A_SINK_0 && sources[i] != LM3630A_SINK_1)
399 return -EINVAL;
400
401 ret |= BIT(sources[i]);
402 }
403
404 return ret;
405 }
406
lm3630a_parse_bank(struct lm3630a_platform_data * pdata,struct fwnode_handle * node,int * seen_led_sources)407 static int lm3630a_parse_bank(struct lm3630a_platform_data *pdata,
408 struct fwnode_handle *node, int *seen_led_sources)
409 {
410 int led_sources, ret;
411 const char *label;
412 u32 bank, val;
413 bool linear;
414
415 ret = fwnode_property_read_u32(node, "reg", &bank);
416 if (ret)
417 return ret;
418
419 if (bank != LM3630A_BANK_0 && bank != LM3630A_BANK_1)
420 return -EINVAL;
421
422 led_sources = lm3630a_parse_led_sources(node, BIT(bank));
423 if (led_sources < 0)
424 return led_sources;
425
426 if (*seen_led_sources & led_sources)
427 return -EINVAL;
428
429 *seen_led_sources |= led_sources;
430
431 linear = fwnode_property_read_bool(node,
432 "ti,linear-mapping-mode");
433 if (bank) {
434 if (led_sources & BIT(LM3630A_SINK_0) ||
435 !(led_sources & BIT(LM3630A_SINK_1)))
436 return -EINVAL;
437
438 pdata->ledb_ctrl = linear ?
439 LM3630A_LEDB_ENABLE_LINEAR :
440 LM3630A_LEDB_ENABLE;
441 } else {
442 if (!(led_sources & BIT(LM3630A_SINK_0)))
443 return -EINVAL;
444
445 pdata->leda_ctrl = linear ?
446 LM3630A_LEDA_ENABLE_LINEAR :
447 LM3630A_LEDA_ENABLE;
448
449 if (led_sources & BIT(LM3630A_SINK_1))
450 pdata->ledb_ctrl = LM3630A_LEDB_ON_A;
451 }
452
453 ret = fwnode_property_read_string(node, "label", &label);
454 if (!ret) {
455 if (bank)
456 pdata->ledb_label = label;
457 else
458 pdata->leda_label = label;
459 }
460
461 ret = fwnode_property_read_u32(node, "default-brightness",
462 &val);
463 if (!ret) {
464 if (bank)
465 pdata->ledb_init_brt = val;
466 else
467 pdata->leda_init_brt = val;
468 }
469
470 ret = fwnode_property_read_u32(node, "max-brightness", &val);
471 if (!ret) {
472 if (bank)
473 pdata->ledb_max_brt = val;
474 else
475 pdata->leda_max_brt = val;
476 }
477
478 return 0;
479 }
480
lm3630a_parse_node(struct lm3630a_chip * pchip,struct lm3630a_platform_data * pdata)481 static int lm3630a_parse_node(struct lm3630a_chip *pchip,
482 struct lm3630a_platform_data *pdata)
483 {
484 int ret = -ENODEV, seen_led_sources = 0;
485 struct fwnode_handle *node;
486
487 device_for_each_child_node(pchip->dev, node) {
488 ret = lm3630a_parse_bank(pdata, node, &seen_led_sources);
489 if (ret) {
490 fwnode_handle_put(node);
491 return ret;
492 }
493 }
494
495 return ret;
496 }
497
lm3630a_probe(struct i2c_client * client)498 static int lm3630a_probe(struct i2c_client *client)
499 {
500 struct lm3630a_platform_data *pdata = dev_get_platdata(&client->dev);
501 struct lm3630a_chip *pchip;
502 int rval;
503
504 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
505 dev_err(&client->dev, "fail : i2c functionality check\n");
506 return -EOPNOTSUPP;
507 }
508
509 pchip = devm_kzalloc(&client->dev, sizeof(struct lm3630a_chip),
510 GFP_KERNEL);
511 if (!pchip)
512 return -ENOMEM;
513 pchip->dev = &client->dev;
514
515 pchip->regmap = devm_regmap_init_i2c(client, &lm3630a_regmap);
516 if (IS_ERR(pchip->regmap)) {
517 rval = PTR_ERR(pchip->regmap);
518 dev_err(&client->dev, "fail : allocate reg. map: %d\n", rval);
519 return rval;
520 }
521
522 i2c_set_clientdata(client, pchip);
523 if (pdata == NULL) {
524 pdata = devm_kzalloc(pchip->dev,
525 sizeof(struct lm3630a_platform_data),
526 GFP_KERNEL);
527 if (pdata == NULL)
528 return -ENOMEM;
529
530 /* default values */
531 pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS;
532 pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS;
533 pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS;
534 pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS;
535
536 rval = lm3630a_parse_node(pchip, pdata);
537 if (rval) {
538 dev_err(&client->dev, "fail : parse node\n");
539 return rval;
540 }
541 }
542 pchip->pdata = pdata;
543
544 pchip->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable",
545 GPIOD_OUT_HIGH);
546 if (IS_ERR(pchip->enable_gpio)) {
547 rval = PTR_ERR(pchip->enable_gpio);
548 return rval;
549 }
550
551 /* chip initialize */
552 rval = lm3630a_chip_init(pchip);
553 if (rval < 0) {
554 dev_err(&client->dev, "fail : init chip\n");
555 return rval;
556 }
557 /* backlight register */
558 rval = lm3630a_backlight_register(pchip);
559 if (rval < 0) {
560 dev_err(&client->dev, "fail : backlight register.\n");
561 return rval;
562 }
563 /* pwm */
564 if (pdata->pwm_ctrl != LM3630A_PWM_DISABLE) {
565 pchip->pwmd = devm_pwm_get(pchip->dev, "lm3630a-pwm");
566 if (IS_ERR(pchip->pwmd)) {
567 dev_err(&client->dev, "fail : get pwm device\n");
568 return PTR_ERR(pchip->pwmd);
569 }
570
571 pwm_init_state(pchip->pwmd, &pchip->pwmd_state);
572 }
573
574 /* interrupt enable : irq 0 is not allowed */
575 pchip->irq = client->irq;
576 if (pchip->irq) {
577 rval = lm3630a_intr_config(pchip);
578 if (rval < 0)
579 return rval;
580 }
581 dev_info(&client->dev, "LM3630A backlight register OK.\n");
582 return 0;
583 }
584
lm3630a_remove(struct i2c_client * client)585 static void lm3630a_remove(struct i2c_client *client)
586 {
587 int rval;
588 struct lm3630a_chip *pchip = i2c_get_clientdata(client);
589
590 rval = lm3630a_write(pchip, REG_BRT_A, 0);
591 if (rval < 0)
592 dev_err(pchip->dev, "i2c failed to access register\n");
593
594 rval = lm3630a_write(pchip, REG_BRT_B, 0);
595 if (rval < 0)
596 dev_err(pchip->dev, "i2c failed to access register\n");
597
598 if (pchip->irq) {
599 free_irq(pchip->irq, pchip);
600 destroy_workqueue(pchip->irqthread);
601 }
602 }
603
604 static const struct i2c_device_id lm3630a_id[] = {
605 {LM3630A_NAME, 0},
606 {}
607 };
608
609 MODULE_DEVICE_TABLE(i2c, lm3630a_id);
610
611 static const struct of_device_id lm3630a_match_table[] = {
612 { .compatible = "ti,lm3630a", },
613 { },
614 };
615
616 MODULE_DEVICE_TABLE(of, lm3630a_match_table);
617
618 static struct i2c_driver lm3630a_i2c_driver = {
619 .driver = {
620 .name = LM3630A_NAME,
621 .of_match_table = lm3630a_match_table,
622 },
623 .probe = lm3630a_probe,
624 .remove = lm3630a_remove,
625 .id_table = lm3630a_id,
626 };
627
628 module_i2c_driver(lm3630a_i2c_driver);
629
630 MODULE_DESCRIPTION("Texas Instruments Backlight driver for LM3630A");
631 MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
632 MODULE_AUTHOR("LDD MLP <ldd-mlp@list.ti.com>");
633 MODULE_LICENSE("GPL v2");
634
