1 // SPDX-License-Identifier: GPL-2.0-only
3 * Xilinx gpio driver for xps/axi_gpio IP.
5 * Copyright 2008 - 2013 Xilinx, Inc.
8 #include <linux/bitmap.h>
9 #include <linux/bitops.h>
10 #include <linux/clk.h>
11 #include <linux/errno.h>
12 #include <linux/gpio/driver.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/slab.h>
23 /* Register Offset Definitions */
24 #define XGPIO_DATA_OFFSET (0x0) /* Data register */
25 #define XGPIO_TRI_OFFSET (0x4) /* I/O direction register */
27 #define XGPIO_CHANNEL0_OFFSET 0x0
28 #define XGPIO_CHANNEL1_OFFSET 0x8
30 #define XGPIO_GIER_OFFSET 0x11c /* Global Interrupt Enable */
31 #define XGPIO_GIER_IE BIT(31)
32 #define XGPIO_IPISR_OFFSET 0x120 /* IP Interrupt Status */
33 #define XGPIO_IPIER_OFFSET 0x128 /* IP Interrupt Enable */
35 /* Read/Write access to the GPIO registers */
36 #if defined(CONFIG_ARCH_ZYNQ) || defined(CONFIG_X86)
37 # define xgpio_readreg(offset) readl(offset)
38 # define xgpio_writereg(offset, val) writel(val, offset)
40 # define xgpio_readreg(offset) __raw_readl(offset)
41 # define xgpio_writereg(offset, val) __raw_writel(val, offset)
45 * struct xgpio_instance - Stores information about GPIO device
47 * @regs: register block
48 * @hw_map: GPIO pin mapping on hardware side
49 * @sw_map: GPIO pin mapping on software side
50 * @state: GPIO write state shadow register
51 * @last_irq_read: GPIO read state register from last interrupt
52 * @dir: GPIO direction shadow register
53 * @gpio_lock: Lock used for synchronization
54 * @irq: IRQ used by GPIO device
56 * @enable: GPIO IRQ enable/disable bitfield
57 * @rising_edge: GPIO IRQ rising edge enable/disable bitfield
58 * @falling_edge: GPIO IRQ falling edge enable/disable bitfield
59 * @clk: clock resource for this driver
61 struct xgpio_instance {
64 DECLARE_BITMAP(hw_map, 64);
65 DECLARE_BITMAP(sw_map, 64);
66 DECLARE_BITMAP(state, 64);
67 DECLARE_BITMAP(last_irq_read, 64);
68 DECLARE_BITMAP(dir, 64);
69 spinlock_t gpio_lock; /* For serializing operations */
71 DECLARE_BITMAP(enable, 64);
72 DECLARE_BITMAP(rising_edge, 64);
73 DECLARE_BITMAP(falling_edge, 64);
77 static inline int xgpio_from_bit(struct xgpio_instance *chip, int bit)
79 return bitmap_bitremap(bit, chip->hw_map, chip->sw_map, 64);
82 static inline int xgpio_to_bit(struct xgpio_instance *chip, int gpio)
84 return bitmap_bitremap(gpio, chip->sw_map, chip->hw_map, 64);
87 static inline u32 xgpio_get_value32(const unsigned long *map, int bit)
89 const size_t index = BIT_WORD(bit);
90 const unsigned long offset = (bit % BITS_PER_LONG) & BIT(5);
92 return (map[index] >> offset) & 0xFFFFFFFFul;
95 static inline void xgpio_set_value32(unsigned long *map, int bit, u32 v)
97 const size_t index = BIT_WORD(bit);
98 const unsigned long offset = (bit % BITS_PER_LONG) & BIT(5);
100 map[index] &= ~(0xFFFFFFFFul << offset);
101 map[index] |= (unsigned long)v << offset;
104 static inline int xgpio_regoffset(struct xgpio_instance *chip, int ch)
108 return XGPIO_CHANNEL0_OFFSET;
110 return XGPIO_CHANNEL1_OFFSET;
116 static void xgpio_read_ch(struct xgpio_instance *chip, int reg, int bit, unsigned long *a)
118 void __iomem *addr = chip->regs + reg + xgpio_regoffset(chip, bit / 32);
120 xgpio_set_value32(a, bit, xgpio_readreg(addr));
123 static void xgpio_write_ch(struct xgpio_instance *chip, int reg, int bit, unsigned long *a)
125 void __iomem *addr = chip->regs + reg + xgpio_regoffset(chip, bit / 32);
127 xgpio_writereg(addr, xgpio_get_value32(a, bit));
130 static void xgpio_read_ch_all(struct xgpio_instance *chip, int reg, unsigned long *a)
132 int bit, lastbit = xgpio_to_bit(chip, chip->gc.ngpio - 1);
134 for (bit = 0; bit <= lastbit ; bit += 32)
135 xgpio_read_ch(chip, reg, bit, a);
138 static void xgpio_write_ch_all(struct xgpio_instance *chip, int reg, unsigned long *a)
140 int bit, lastbit = xgpio_to_bit(chip, chip->gc.ngpio - 1);
142 for (bit = 0; bit <= lastbit ; bit += 32)
143 xgpio_write_ch(chip, reg, bit, a);
147 * xgpio_get - Read the specified signal of the GPIO device.
148 * @gc: Pointer to gpio_chip device structure.
149 * @gpio: GPIO signal number.
151 * This function reads the specified signal of the GPIO device.
154 * 0 if direction of GPIO signals is set as input otherwise it
155 * returns negative error value.
157 static int xgpio_get(struct gpio_chip *gc, unsigned int gpio)
159 struct xgpio_instance *chip = gpiochip_get_data(gc);
160 int bit = xgpio_to_bit(chip, gpio);
161 DECLARE_BITMAP(state, 64);
163 xgpio_read_ch(chip, XGPIO_DATA_OFFSET, bit, state);
165 return test_bit(bit, state);
169 * xgpio_set - Write the specified signal of the GPIO device.
170 * @gc: Pointer to gpio_chip device structure.
171 * @gpio: GPIO signal number.
172 * @val: Value to be written to specified signal.
174 * This function writes the specified value in to the specified signal of the
177 static void xgpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
180 struct xgpio_instance *chip = gpiochip_get_data(gc);
181 int bit = xgpio_to_bit(chip, gpio);
183 spin_lock_irqsave(&chip->gpio_lock, flags);
185 /* Write to GPIO signal and set its direction to output */
186 __assign_bit(bit, chip->state, val);
188 xgpio_write_ch(chip, XGPIO_DATA_OFFSET, bit, chip->state);
190 spin_unlock_irqrestore(&chip->gpio_lock, flags);
194 * xgpio_set_multiple - Write the specified signals of the GPIO device.
195 * @gc: Pointer to gpio_chip device structure.
196 * @mask: Mask of the GPIOS to modify.
197 * @bits: Value to be wrote on each GPIO
199 * This function writes the specified values into the specified signals of the
202 static void xgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
205 DECLARE_BITMAP(hw_mask, 64);
206 DECLARE_BITMAP(hw_bits, 64);
207 DECLARE_BITMAP(state, 64);
209 struct xgpio_instance *chip = gpiochip_get_data(gc);
211 bitmap_remap(hw_mask, mask, chip->sw_map, chip->hw_map, 64);
212 bitmap_remap(hw_bits, bits, chip->sw_map, chip->hw_map, 64);
214 spin_lock_irqsave(&chip->gpio_lock, flags);
216 bitmap_replace(state, chip->state, hw_bits, hw_mask, 64);
218 xgpio_write_ch_all(chip, XGPIO_DATA_OFFSET, state);
220 bitmap_copy(chip->state, state, 64);
222 spin_unlock_irqrestore(&chip->gpio_lock, flags);
226 * xgpio_dir_in - Set the direction of the specified GPIO signal as input.
227 * @gc: Pointer to gpio_chip device structure.
228 * @gpio: GPIO signal number.
231 * 0 - if direction of GPIO signals is set as input
232 * otherwise it returns negative error value.
234 static int xgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
237 struct xgpio_instance *chip = gpiochip_get_data(gc);
238 int bit = xgpio_to_bit(chip, gpio);
240 spin_lock_irqsave(&chip->gpio_lock, flags);
242 /* Set the GPIO bit in shadow register and set direction as input */
243 __set_bit(bit, chip->dir);
244 xgpio_write_ch(chip, XGPIO_TRI_OFFSET, bit, chip->dir);
246 spin_unlock_irqrestore(&chip->gpio_lock, flags);
252 * xgpio_dir_out - Set the direction of the specified GPIO signal as output.
253 * @gc: Pointer to gpio_chip device structure.
254 * @gpio: GPIO signal number.
255 * @val: Value to be written to specified signal.
257 * This function sets the direction of specified GPIO signal as output.
260 * If all GPIO signals of GPIO chip is configured as input then it returns
261 * error otherwise it returns 0.
263 static int xgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
266 struct xgpio_instance *chip = gpiochip_get_data(gc);
267 int bit = xgpio_to_bit(chip, gpio);
269 spin_lock_irqsave(&chip->gpio_lock, flags);
271 /* Write state of GPIO signal */
272 __assign_bit(bit, chip->state, val);
273 xgpio_write_ch(chip, XGPIO_DATA_OFFSET, bit, chip->state);
275 /* Clear the GPIO bit in shadow register and set direction as output */
276 __clear_bit(bit, chip->dir);
277 xgpio_write_ch(chip, XGPIO_TRI_OFFSET, bit, chip->dir);
279 spin_unlock_irqrestore(&chip->gpio_lock, flags);
285 * xgpio_save_regs - Set initial values of GPIO pins
286 * @chip: Pointer to GPIO instance
288 static void xgpio_save_regs(struct xgpio_instance *chip)
290 xgpio_write_ch_all(chip, XGPIO_DATA_OFFSET, chip->state);
291 xgpio_write_ch_all(chip, XGPIO_TRI_OFFSET, chip->dir);
294 static int xgpio_request(struct gpio_chip *chip, unsigned int offset)
298 ret = pm_runtime_get_sync(chip->parent);
300 * If the device is already active pm_runtime_get() will return 1 on
301 * success, but gpio_request still needs to return 0.
303 return ret < 0 ? ret : 0;
306 static void xgpio_free(struct gpio_chip *chip, unsigned int offset)
308 pm_runtime_put(chip->parent);
311 static int __maybe_unused xgpio_suspend(struct device *dev)
313 struct xgpio_instance *gpio = dev_get_drvdata(dev);
314 struct irq_data *data = irq_get_irq_data(gpio->irq);
317 dev_dbg(dev, "IRQ not connected\n");
318 return pm_runtime_force_suspend(dev);
321 if (!irqd_is_wakeup_set(data))
322 return pm_runtime_force_suspend(dev);
328 * xgpio_remove - Remove method for the GPIO device.
329 * @pdev: pointer to the platform device
331 * This function remove gpiochips and frees all the allocated resources.
335 static int xgpio_remove(struct platform_device *pdev)
337 struct xgpio_instance *gpio = platform_get_drvdata(pdev);
339 pm_runtime_get_sync(&pdev->dev);
340 pm_runtime_put_noidle(&pdev->dev);
341 pm_runtime_disable(&pdev->dev);
342 clk_disable_unprepare(gpio->clk);
348 * xgpio_irq_ack - Acknowledge a child GPIO interrupt.
349 * @irq_data: per IRQ and chip data passed down to chip functions
350 * This currently does nothing, but irq_ack is unconditionally called by
351 * handle_edge_irq and therefore must be defined.
353 static void xgpio_irq_ack(struct irq_data *irq_data)
357 static int __maybe_unused xgpio_resume(struct device *dev)
359 struct xgpio_instance *gpio = dev_get_drvdata(dev);
360 struct irq_data *data = irq_get_irq_data(gpio->irq);
363 dev_dbg(dev, "IRQ not connected\n");
364 return pm_runtime_force_resume(dev);
367 if (!irqd_is_wakeup_set(data))
368 return pm_runtime_force_resume(dev);
373 static int __maybe_unused xgpio_runtime_suspend(struct device *dev)
375 struct xgpio_instance *gpio = dev_get_drvdata(dev);
377 clk_disable(gpio->clk);
382 static int __maybe_unused xgpio_runtime_resume(struct device *dev)
384 struct xgpio_instance *gpio = dev_get_drvdata(dev);
386 return clk_enable(gpio->clk);
389 static const struct dev_pm_ops xgpio_dev_pm_ops = {
390 SET_SYSTEM_SLEEP_PM_OPS(xgpio_suspend, xgpio_resume)
391 SET_RUNTIME_PM_OPS(xgpio_runtime_suspend,
392 xgpio_runtime_resume, NULL)
396 * xgpio_irq_mask - Write the specified signal of the GPIO device.
397 * @irq_data: per IRQ and chip data passed down to chip functions
399 static void xgpio_irq_mask(struct irq_data *irq_data)
402 struct xgpio_instance *chip = irq_data_get_irq_chip_data(irq_data);
403 int irq_offset = irqd_to_hwirq(irq_data);
404 int bit = xgpio_to_bit(chip, irq_offset);
405 u32 mask = BIT(bit / 32), temp;
407 spin_lock_irqsave(&chip->gpio_lock, flags);
409 __clear_bit(bit, chip->enable);
411 if (xgpio_get_value32(chip->enable, bit) == 0) {
412 /* Disable per channel interrupt */
413 temp = xgpio_readreg(chip->regs + XGPIO_IPIER_OFFSET);
415 xgpio_writereg(chip->regs + XGPIO_IPIER_OFFSET, temp);
417 spin_unlock_irqrestore(&chip->gpio_lock, flags);
419 gpiochip_disable_irq(&chip->gc, irq_offset);
423 * xgpio_irq_unmask - Write the specified signal of the GPIO device.
424 * @irq_data: per IRQ and chip data passed down to chip functions
426 static void xgpio_irq_unmask(struct irq_data *irq_data)
429 struct xgpio_instance *chip = irq_data_get_irq_chip_data(irq_data);
430 int irq_offset = irqd_to_hwirq(irq_data);
431 int bit = xgpio_to_bit(chip, irq_offset);
432 u32 old_enable = xgpio_get_value32(chip->enable, bit);
433 u32 mask = BIT(bit / 32), val;
435 gpiochip_enable_irq(&chip->gc, irq_offset);
437 spin_lock_irqsave(&chip->gpio_lock, flags);
439 __set_bit(bit, chip->enable);
441 if (old_enable == 0) {
442 /* Clear any existing per-channel interrupts */
443 val = xgpio_readreg(chip->regs + XGPIO_IPISR_OFFSET);
445 xgpio_writereg(chip->regs + XGPIO_IPISR_OFFSET, val);
447 /* Update GPIO IRQ read data before enabling interrupt*/
448 xgpio_read_ch(chip, XGPIO_DATA_OFFSET, bit, chip->last_irq_read);
450 /* Enable per channel interrupt */
451 val = xgpio_readreg(chip->regs + XGPIO_IPIER_OFFSET);
453 xgpio_writereg(chip->regs + XGPIO_IPIER_OFFSET, val);
456 spin_unlock_irqrestore(&chip->gpio_lock, flags);
460 * xgpio_set_irq_type - Write the specified signal of the GPIO device.
461 * @irq_data: Per IRQ and chip data passed down to chip functions
462 * @type: Interrupt type that is to be set for the gpio pin
465 * 0 if interrupt type is supported otherwise -EINVAL
467 static int xgpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
469 struct xgpio_instance *chip = irq_data_get_irq_chip_data(irq_data);
470 int irq_offset = irqd_to_hwirq(irq_data);
471 int bit = xgpio_to_bit(chip, irq_offset);
474 * The Xilinx GPIO hardware provides a single interrupt status
475 * indication for any state change in a given GPIO channel (bank).
476 * Therefore, only rising edge or falling edge triggers are
479 switch (type & IRQ_TYPE_SENSE_MASK) {
480 case IRQ_TYPE_EDGE_BOTH:
481 __set_bit(bit, chip->rising_edge);
482 __set_bit(bit, chip->falling_edge);
484 case IRQ_TYPE_EDGE_RISING:
485 __set_bit(bit, chip->rising_edge);
486 __clear_bit(bit, chip->falling_edge);
488 case IRQ_TYPE_EDGE_FALLING:
489 __clear_bit(bit, chip->rising_edge);
490 __set_bit(bit, chip->falling_edge);
496 irq_set_handler_locked(irq_data, handle_edge_irq);
501 * xgpio_irqhandler - Gpio interrupt service routine
502 * @desc: Pointer to interrupt description
504 static void xgpio_irqhandler(struct irq_desc *desc)
506 struct xgpio_instance *chip = irq_desc_get_handler_data(desc);
507 struct gpio_chip *gc = &chip->gc;
508 struct irq_chip *irqchip = irq_desc_get_chip(desc);
509 DECLARE_BITMAP(rising, 64);
510 DECLARE_BITMAP(falling, 64);
511 DECLARE_BITMAP(all, 64);
516 status = xgpio_readreg(chip->regs + XGPIO_IPISR_OFFSET);
517 xgpio_writereg(chip->regs + XGPIO_IPISR_OFFSET, status);
519 chained_irq_enter(irqchip, desc);
521 spin_lock(&chip->gpio_lock);
523 xgpio_read_ch_all(chip, XGPIO_DATA_OFFSET, all);
525 bitmap_complement(rising, chip->last_irq_read, 64);
526 bitmap_and(rising, rising, all, 64);
527 bitmap_and(rising, rising, chip->enable, 64);
528 bitmap_and(rising, rising, chip->rising_edge, 64);
530 bitmap_complement(falling, all, 64);
531 bitmap_and(falling, falling, chip->last_irq_read, 64);
532 bitmap_and(falling, falling, chip->enable, 64);
533 bitmap_and(falling, falling, chip->falling_edge, 64);
535 bitmap_copy(chip->last_irq_read, all, 64);
536 bitmap_or(all, rising, falling, 64);
538 spin_unlock(&chip->gpio_lock);
540 dev_dbg(gc->parent, "IRQ rising %*pb falling %*pb\n", 64, rising, 64, falling);
542 for_each_set_bit(bit, all, 64) {
543 irq_offset = xgpio_from_bit(chip, bit);
544 generic_handle_domain_irq(gc->irq.domain, irq_offset);
547 chained_irq_exit(irqchip, desc);
550 static const struct irq_chip xgpio_irq_chip = {
551 .name = "gpio-xilinx",
552 .irq_ack = xgpio_irq_ack,
553 .irq_mask = xgpio_irq_mask,
554 .irq_unmask = xgpio_irq_unmask,
555 .irq_set_type = xgpio_set_irq_type,
556 .flags = IRQCHIP_IMMUTABLE,
557 GPIOCHIP_IRQ_RESOURCE_HELPERS,
561 * xgpio_probe - Probe method for the GPIO device.
562 * @pdev: pointer to the platform device
565 * It returns 0, if the driver is bound to the GPIO device, or
566 * a negative value if there is an error.
568 static int xgpio_probe(struct platform_device *pdev)
570 struct xgpio_instance *chip;
572 struct device_node *np = pdev->dev.of_node;
577 struct gpio_irq_chip *girq;
580 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
584 platform_set_drvdata(pdev, chip);
586 /* First, check if the device is dual-channel */
587 of_property_read_u32(np, "xlnx,is-dual", &is_dual);
590 memset32(width, 0, ARRAY_SIZE(width));
591 memset32(state, 0, ARRAY_SIZE(state));
592 memset32(dir, 0xFFFFFFFF, ARRAY_SIZE(dir));
594 /* Update GPIO state shadow register with default value */
595 of_property_read_u32(np, "xlnx,dout-default", &state[0]);
596 of_property_read_u32(np, "xlnx,dout-default-2", &state[1]);
598 bitmap_from_arr32(chip->state, state, 64);
600 /* Update GPIO direction shadow register with default value */
601 of_property_read_u32(np, "xlnx,tri-default", &dir[0]);
602 of_property_read_u32(np, "xlnx,tri-default-2", &dir[1]);
604 bitmap_from_arr32(chip->dir, dir, 64);
607 * Check device node and parent device node for device width
608 * and assume default width of 32
610 if (of_property_read_u32(np, "xlnx,gpio-width", &width[0]))
616 if (is_dual && of_property_read_u32(np, "xlnx,gpio2-width", &width[1]))
622 /* Setup software pin mapping */
623 bitmap_set(chip->sw_map, 0, width[0] + width[1]);
625 /* Setup hardware pin mapping */
626 bitmap_set(chip->hw_map, 0, width[0]);
627 bitmap_set(chip->hw_map, 32, width[1]);
629 spin_lock_init(&chip->gpio_lock);
632 chip->gc.ngpio = bitmap_weight(chip->hw_map, 64);
633 chip->gc.parent = &pdev->dev;
634 chip->gc.direction_input = xgpio_dir_in;
635 chip->gc.direction_output = xgpio_dir_out;
636 chip->gc.get = xgpio_get;
637 chip->gc.set = xgpio_set;
638 chip->gc.request = xgpio_request;
639 chip->gc.free = xgpio_free;
640 chip->gc.set_multiple = xgpio_set_multiple;
642 chip->gc.label = dev_name(&pdev->dev);
644 chip->regs = devm_platform_ioremap_resource(pdev, 0);
645 if (IS_ERR(chip->regs)) {
646 dev_err(&pdev->dev, "failed to ioremap memory resource\n");
647 return PTR_ERR(chip->regs);
650 chip->clk = devm_clk_get_optional(&pdev->dev, NULL);
651 if (IS_ERR(chip->clk))
652 return dev_err_probe(&pdev->dev, PTR_ERR(chip->clk), "input clock not found.\n");
654 status = clk_prepare_enable(chip->clk);
656 dev_err(&pdev->dev, "Failed to prepare clk\n");
659 pm_runtime_get_noresume(&pdev->dev);
660 pm_runtime_set_active(&pdev->dev);
661 pm_runtime_enable(&pdev->dev);
663 xgpio_save_regs(chip);
665 chip->irq = platform_get_irq_optional(pdev, 0);
669 /* Disable per-channel interrupts */
670 xgpio_writereg(chip->regs + XGPIO_IPIER_OFFSET, 0);
671 /* Clear any existing per-channel interrupts */
672 temp = xgpio_readreg(chip->regs + XGPIO_IPISR_OFFSET);
673 xgpio_writereg(chip->regs + XGPIO_IPISR_OFFSET, temp);
674 /* Enable global interrupts */
675 xgpio_writereg(chip->regs + XGPIO_GIER_OFFSET, XGPIO_GIER_IE);
677 girq = &chip->gc.irq;
678 gpio_irq_chip_set_chip(girq, &xgpio_irq_chip);
679 girq->parent_handler = xgpio_irqhandler;
680 girq->num_parents = 1;
681 girq->parents = devm_kcalloc(&pdev->dev, 1,
682 sizeof(*girq->parents),
684 if (!girq->parents) {
688 girq->parents[0] = chip->irq;
689 girq->default_type = IRQ_TYPE_NONE;
690 girq->handler = handle_bad_irq;
693 status = devm_gpiochip_add_data(&pdev->dev, &chip->gc, chip);
695 dev_err(&pdev->dev, "failed to add GPIO chip\n");
699 pm_runtime_put(&pdev->dev);
703 pm_runtime_disable(&pdev->dev);
704 pm_runtime_put_noidle(&pdev->dev);
705 clk_disable_unprepare(chip->clk);
709 static const struct of_device_id xgpio_of_match[] = {
710 { .compatible = "xlnx,xps-gpio-1.00.a", },
711 { /* end of list */ },
714 MODULE_DEVICE_TABLE(of, xgpio_of_match);
716 static struct platform_driver xgpio_plat_driver = {
717 .probe = xgpio_probe,
718 .remove = xgpio_remove,
720 .name = "gpio-xilinx",
721 .of_match_table = xgpio_of_match,
722 .pm = &xgpio_dev_pm_ops,
726 static int __init xgpio_init(void)
728 return platform_driver_register(&xgpio_plat_driver);
731 subsys_initcall(xgpio_init);
733 static void __exit xgpio_exit(void)
735 platform_driver_unregister(&xgpio_plat_driver);
737 module_exit(xgpio_exit);
739 MODULE_AUTHOR("Xilinx, Inc.");
740 MODULE_DESCRIPTION("Xilinx GPIO driver");
741 MODULE_LICENSE("GPL");