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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2016-2017 NVIDIA Corporation
4 *
5 * Author: Thierry Reding <treding@nvidia.com>
6 */
7
8#include <linux/gpio/driver.h>
9#include <linux/interrupt.h>
10#include <linux/irq.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/platform_device.h>
14
15#include <dt-bindings/gpio/tegra186-gpio.h>
16#include <dt-bindings/gpio/tegra194-gpio.h>
17
18/* security registers */
19#define TEGRA186_GPIO_CTL_SCR 0x0c
20#define TEGRA186_GPIO_CTL_SCR_SEC_WEN BIT(28)
21#define TEGRA186_GPIO_CTL_SCR_SEC_REN BIT(27)
22
23#define TEGRA186_GPIO_INT_ROUTE_MAPPING(p, x) (0x14 + (p) * 0x20 + (x) * 4)
24
25/* control registers */
26#define TEGRA186_GPIO_ENABLE_CONFIG 0x00
27#define TEGRA186_GPIO_ENABLE_CONFIG_ENABLE BIT(0)
28#define TEGRA186_GPIO_ENABLE_CONFIG_OUT BIT(1)
29#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_NONE (0x0 << 2)
30#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL (0x1 << 2)
31#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE (0x2 << 2)
32#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE (0x3 << 2)
33#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK (0x3 << 2)
34#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL BIT(4)
35#define TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE BIT(5)
36#define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT BIT(6)
37
38#define TEGRA186_GPIO_DEBOUNCE_CONTROL 0x04
39#define TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(x) ((x) & 0xff)
40
41#define TEGRA186_GPIO_INPUT 0x08
42#define TEGRA186_GPIO_INPUT_HIGH BIT(0)
43
44#define TEGRA186_GPIO_OUTPUT_CONTROL 0x0c
45#define TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED BIT(0)
46
47#define TEGRA186_GPIO_OUTPUT_VALUE 0x10
48#define TEGRA186_GPIO_OUTPUT_VALUE_HIGH BIT(0)
49
50#define TEGRA186_GPIO_INTERRUPT_CLEAR 0x14
51
52#define TEGRA186_GPIO_INTERRUPT_STATUS(x) (0x100 + (x) * 4)
53
54struct tegra_gpio_port {
55 const char *name;
56 unsigned int bank;
57 unsigned int port;
58 unsigned int pins;
59};
60
61struct tegra186_pin_range {
62 unsigned int offset;
63 const char *group;
64};
65
66struct tegra_gpio_soc {
67 const struct tegra_gpio_port *ports;
68 unsigned int num_ports;
69 const char *name;
70 unsigned int instance;
71
72 const struct tegra186_pin_range *pin_ranges;
73 unsigned int num_pin_ranges;
74 const char *pinmux;
75};
76
77struct tegra_gpio {
78 struct gpio_chip gpio;
79 struct irq_chip intc;
80 unsigned int num_irq;
81 unsigned int *irq;
82
83 const struct tegra_gpio_soc *soc;
84
85 void __iomem *secure;
86 void __iomem *base;
87};
88
89static const struct tegra_gpio_port *
90tegra186_gpio_get_port(struct tegra_gpio *gpio, unsigned int *pin)
91{
92 unsigned int start = 0, i;
93
94 for (i = 0; i < gpio->soc->num_ports; i++) {
95 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
96
97 if (*pin >= start && *pin < start + port->pins) {
98 *pin -= start;
99 return port;
100 }
101
102 start += port->pins;
103 }
104
105 return NULL;
106}
107
108static void __iomem *tegra186_gpio_get_base(struct tegra_gpio *gpio,
109 unsigned int pin)
110{
111 const struct tegra_gpio_port *port;
112 unsigned int offset;
113
114 port = tegra186_gpio_get_port(gpio, &pin);
115 if (!port)
116 return NULL;
117
118 offset = port->bank * 0x1000 + port->port * 0x200;
119
120 return gpio->base + offset + pin * 0x20;
121}
122
123static int tegra186_gpio_get_direction(struct gpio_chip *chip,
124 unsigned int offset)
125{
126 struct tegra_gpio *gpio = gpiochip_get_data(chip);
127 void __iomem *base;
128 u32 value;
129
130 base = tegra186_gpio_get_base(gpio, offset);
131 if (WARN_ON(base == NULL))
132 return -ENODEV;
133
134 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
135 if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT)
136 return GPIO_LINE_DIRECTION_OUT;
137
138 return GPIO_LINE_DIRECTION_IN;
139}
140
141static int tegra186_gpio_direction_input(struct gpio_chip *chip,
142 unsigned int offset)
143{
144 struct tegra_gpio *gpio = gpiochip_get_data(chip);
145 void __iomem *base;
146 u32 value;
147
148 base = tegra186_gpio_get_base(gpio, offset);
149 if (WARN_ON(base == NULL))
150 return -ENODEV;
151
152 value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL);
153 value |= TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED;
154 writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL);
155
156 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
157 value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE;
158 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_OUT;
159 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
160
161 return 0;
162}
163
164static int tegra186_gpio_direction_output(struct gpio_chip *chip,
165 unsigned int offset, int level)
166{
167 struct tegra_gpio *gpio = gpiochip_get_data(chip);
168 void __iomem *base;
169 u32 value;
170
171 /* configure output level first */
172 chip->set(chip, offset, level);
173
174 base = tegra186_gpio_get_base(gpio, offset);
175 if (WARN_ON(base == NULL))
176 return -EINVAL;
177
178 /* set the direction */
179 value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL);
180 value &= ~TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED;
181 writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL);
182
183 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
184 value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE;
185 value |= TEGRA186_GPIO_ENABLE_CONFIG_OUT;
186 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
187
188 return 0;
189}
190
191static int tegra186_gpio_get(struct gpio_chip *chip, unsigned int offset)
192{
193 struct tegra_gpio *gpio = gpiochip_get_data(chip);
194 void __iomem *base;
195 u32 value;
196
197 base = tegra186_gpio_get_base(gpio, offset);
198 if (WARN_ON(base == NULL))
199 return -ENODEV;
200
201 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
202 if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT)
203 value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE);
204 else
205 value = readl(base + TEGRA186_GPIO_INPUT);
206
207 return value & BIT(0);
208}
209
210static void tegra186_gpio_set(struct gpio_chip *chip, unsigned int offset,
211 int level)
212{
213 struct tegra_gpio *gpio = gpiochip_get_data(chip);
214 void __iomem *base;
215 u32 value;
216
217 base = tegra186_gpio_get_base(gpio, offset);
218 if (WARN_ON(base == NULL))
219 return;
220
221 value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE);
222 if (level == 0)
223 value &= ~TEGRA186_GPIO_OUTPUT_VALUE_HIGH;
224 else
225 value |= TEGRA186_GPIO_OUTPUT_VALUE_HIGH;
226
227 writel(value, base + TEGRA186_GPIO_OUTPUT_VALUE);
228}
229
230static int tegra186_gpio_set_config(struct gpio_chip *chip,
231 unsigned int offset,
232 unsigned long config)
233{
234 struct tegra_gpio *gpio = gpiochip_get_data(chip);
235 u32 debounce, value;
236 void __iomem *base;
237
238 base = tegra186_gpio_get_base(gpio, offset);
239 if (base == NULL)
240 return -ENXIO;
241
242 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
243 return -ENOTSUPP;
244
245 debounce = pinconf_to_config_argument(config);
246
247 /*
248 * The Tegra186 GPIO controller supports a maximum of 255 ms debounce
249 * time.
250 */
251 if (debounce > 255000)
252 return -EINVAL;
253
254 debounce = DIV_ROUND_UP(debounce, USEC_PER_MSEC);
255
256 value = TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(debounce);
257 writel(value, base + TEGRA186_GPIO_DEBOUNCE_CONTROL);
258
259 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
260 value |= TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE;
261 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
262
263 return 0;
264}
265
266static int tegra186_gpio_add_pin_ranges(struct gpio_chip *chip)
267{
268 struct tegra_gpio *gpio = gpiochip_get_data(chip);
269 struct pinctrl_dev *pctldev;
270 struct device_node *np;
271 unsigned int i, j;
272 int err;
273
274 if (!gpio->soc->pinmux || gpio->soc->num_pin_ranges == 0)
275 return 0;
276
277 np = of_find_compatible_node(NULL, NULL, gpio->soc->pinmux);
278 if (!np)
279 return -ENODEV;
280
281 pctldev = of_pinctrl_get(np);
282 of_node_put(np);
283 if (!pctldev)
284 return -EPROBE_DEFER;
285
286 for (i = 0; i < gpio->soc->num_pin_ranges; i++) {
287 unsigned int pin = gpio->soc->pin_ranges[i].offset, port;
288 const char *group = gpio->soc->pin_ranges[i].group;
289
290 port = pin / 8;
291 pin = pin % 8;
292
293 if (port >= gpio->soc->num_ports) {
294 dev_warn(chip->parent, "invalid port %u for %s\n",
295 port, group);
296 continue;
297 }
298
299 for (j = 0; j < port; j++)
300 pin += gpio->soc->ports[j].pins;
301
302 err = gpiochip_add_pingroup_range(chip, pctldev, pin, group);
303 if (err < 0)
304 return err;
305 }
306
307 return 0;
308}
309
310static int tegra186_gpio_of_xlate(struct gpio_chip *chip,
311 const struct of_phandle_args *spec,
312 u32 *flags)
313{
314 struct tegra_gpio *gpio = gpiochip_get_data(chip);
315 unsigned int port, pin, i, offset = 0;
316
317 if (WARN_ON(chip->of_gpio_n_cells < 2))
318 return -EINVAL;
319
320 if (WARN_ON(spec->args_count < chip->of_gpio_n_cells))
321 return -EINVAL;
322
323 port = spec->args[0] / 8;
324 pin = spec->args[0] % 8;
325
326 if (port >= gpio->soc->num_ports) {
327 dev_err(chip->parent, "invalid port number: %u\n", port);
328 return -EINVAL;
329 }
330
331 for (i = 0; i < port; i++)
332 offset += gpio->soc->ports[i].pins;
333
334 if (flags)
335 *flags = spec->args[1];
336
337 return offset + pin;
338}
339
340static void tegra186_irq_ack(struct irq_data *data)
341{
342 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
343 void __iomem *base;
344
345 base = tegra186_gpio_get_base(gpio, data->hwirq);
346 if (WARN_ON(base == NULL))
347 return;
348
349 writel(1, base + TEGRA186_GPIO_INTERRUPT_CLEAR);
350}
351
352static void tegra186_irq_mask(struct irq_data *data)
353{
354 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
355 void __iomem *base;
356 u32 value;
357
358 base = tegra186_gpio_get_base(gpio, data->hwirq);
359 if (WARN_ON(base == NULL))
360 return;
361
362 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
363 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT;
364 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
365}
366
367static void tegra186_irq_unmask(struct irq_data *data)
368{
369 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
370 void __iomem *base;
371 u32 value;
372
373 base = tegra186_gpio_get_base(gpio, data->hwirq);
374 if (WARN_ON(base == NULL))
375 return;
376
377 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
378 value |= TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT;
379 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
380}
381
382static int tegra186_irq_set_type(struct irq_data *data, unsigned int type)
383{
384 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
385 void __iomem *base;
386 u32 value;
387
388 base = tegra186_gpio_get_base(gpio, data->hwirq);
389 if (WARN_ON(base == NULL))
390 return -ENODEV;
391
392 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
393 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK;
394 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL;
395
396 switch (type & IRQ_TYPE_SENSE_MASK) {
397 case IRQ_TYPE_NONE:
398 break;
399
400 case IRQ_TYPE_EDGE_RISING:
401 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE;
402 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL;
403 break;
404
405 case IRQ_TYPE_EDGE_FALLING:
406 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE;
407 break;
408
409 case IRQ_TYPE_EDGE_BOTH:
410 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE;
411 break;
412
413 case IRQ_TYPE_LEVEL_HIGH:
414 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL;
415 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL;
416 break;
417
418 case IRQ_TYPE_LEVEL_LOW:
419 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL;
420 break;
421
422 default:
423 return -EINVAL;
424 }
425
426 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
427
428 if ((type & IRQ_TYPE_EDGE_BOTH) == 0)
429 irq_set_handler_locked(data, handle_level_irq);
430 else
431 irq_set_handler_locked(data, handle_edge_irq);
432
433 return irq_chip_set_type_parent(data, type);
434}
435
436static void tegra186_gpio_irq(struct irq_desc *desc)
437{
438 struct tegra_gpio *gpio = irq_desc_get_handler_data(desc);
439 struct irq_domain *domain = gpio->gpio.irq.domain;
440 struct irq_chip *chip = irq_desc_get_chip(desc);
441 unsigned int parent = irq_desc_get_irq(desc);
442 unsigned int i, offset = 0;
443
444 chained_irq_enter(chip, desc);
445
446 for (i = 0; i < gpio->soc->num_ports; i++) {
447 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
448 unsigned int pin, irq;
449 unsigned long value;
450 void __iomem *base;
451
452 base = gpio->base + port->bank * 0x1000 + port->port * 0x200;
453
454 /* skip ports that are not associated with this bank */
455 if (parent != gpio->irq[port->bank])
456 goto skip;
457
458 value = readl(base + TEGRA186_GPIO_INTERRUPT_STATUS(1));
459
460 for_each_set_bit(pin, &value, port->pins) {
461 irq = irq_find_mapping(domain, offset + pin);
462 if (WARN_ON(irq == 0))
463 continue;
464
465 generic_handle_irq(irq);
466 }
467
468skip:
469 offset += port->pins;
470 }
471
472 chained_irq_exit(chip, desc);
473}
474
475static int tegra186_gpio_irq_domain_translate(struct irq_domain *domain,
476 struct irq_fwspec *fwspec,
477 unsigned long *hwirq,
478 unsigned int *type)
479{
480 struct tegra_gpio *gpio = gpiochip_get_data(domain->host_data);
481 unsigned int port, pin, i, offset = 0;
482
483 if (WARN_ON(gpio->gpio.of_gpio_n_cells < 2))
484 return -EINVAL;
485
486 if (WARN_ON(fwspec->param_count < gpio->gpio.of_gpio_n_cells))
487 return -EINVAL;
488
489 port = fwspec->param[0] / 8;
490 pin = fwspec->param[0] % 8;
491
492 if (port >= gpio->soc->num_ports)
493 return -EINVAL;
494
495 for (i = 0; i < port; i++)
496 offset += gpio->soc->ports[i].pins;
497
498 *type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
499 *hwirq = offset + pin;
500
501 return 0;
502}
503
504static void *tegra186_gpio_populate_parent_fwspec(struct gpio_chip *chip,
505 unsigned int parent_hwirq,
506 unsigned int parent_type)
507{
508 struct tegra_gpio *gpio = gpiochip_get_data(chip);
509 struct irq_fwspec *fwspec;
510
511 fwspec = kmalloc(sizeof(*fwspec), GFP_KERNEL);
512 if (!fwspec)
513 return NULL;
514
515 fwspec->fwnode = chip->irq.parent_domain->fwnode;
516 fwspec->param_count = 3;
517 fwspec->param[0] = gpio->soc->instance;
518 fwspec->param[1] = parent_hwirq;
519 fwspec->param[2] = parent_type;
520
521 return fwspec;
522}
523
524static int tegra186_gpio_child_to_parent_hwirq(struct gpio_chip *chip,
525 unsigned int hwirq,
526 unsigned int type,
527 unsigned int *parent_hwirq,
528 unsigned int *parent_type)
529{
530 *parent_hwirq = chip->irq.child_offset_to_irq(chip, hwirq);
531 *parent_type = type;
532
533 return 0;
534}
535
536static unsigned int tegra186_gpio_child_offset_to_irq(struct gpio_chip *chip,
537 unsigned int offset)
538{
539 struct tegra_gpio *gpio = gpiochip_get_data(chip);
540 unsigned int i;
541
542 for (i = 0; i < gpio->soc->num_ports; i++) {
543 if (offset < gpio->soc->ports[i].pins)
544 break;
545
546 offset -= gpio->soc->ports[i].pins;
547 }
548
549 return offset + i * 8;
550}
551
552static const struct of_device_id tegra186_pmc_of_match[] = {
553 { .compatible = "nvidia,tegra186-pmc" },
554 { .compatible = "nvidia,tegra194-pmc" },
555 { /* sentinel */ }
556};
557
558static void tegra186_gpio_init_route_mapping(struct tegra_gpio *gpio)
559{
560 unsigned int i, j;
561 u32 value;
562
563 for (i = 0; i < gpio->soc->num_ports; i++) {
564 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
565 unsigned int offset, p = port->port;
566 void __iomem *base;
567
568 base = gpio->secure + port->bank * 0x1000 + 0x800;
569
570 value = readl(base + TEGRA186_GPIO_CTL_SCR);
571
572 /*
573 * For controllers that haven't been locked down yet, make
574 * sure to program the default interrupt route mapping.
575 */
576 if ((value & TEGRA186_GPIO_CTL_SCR_SEC_REN) == 0 &&
577 (value & TEGRA186_GPIO_CTL_SCR_SEC_WEN) == 0) {
578 for (j = 0; j < 8; j++) {
579 offset = TEGRA186_GPIO_INT_ROUTE_MAPPING(p, j);
580
581 value = readl(base + offset);
582 value = BIT(port->pins) - 1;
583 writel(value, base + offset);
584 }
585 }
586 }
587}
588
589static int tegra186_gpio_probe(struct platform_device *pdev)
590{
591 unsigned int i, j, offset;
592 struct gpio_irq_chip *irq;
593 struct tegra_gpio *gpio;
594 struct device_node *np;
595 char **names;
596 int err;
597
598 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
599 if (!gpio)
600 return -ENOMEM;
601
602 gpio->soc = of_device_get_match_data(&pdev->dev);
603
604 gpio->secure = devm_platform_ioremap_resource_byname(pdev, "security");
605 if (IS_ERR(gpio->secure))
606 return PTR_ERR(gpio->secure);
607
608 gpio->base = devm_platform_ioremap_resource_byname(pdev, "gpio");
609 if (IS_ERR(gpio->base))
610 return PTR_ERR(gpio->base);
611
612 err = platform_irq_count(pdev);
613 if (err < 0)
614 return err;
615
616 gpio->num_irq = err;
617
618 gpio->irq = devm_kcalloc(&pdev->dev, gpio->num_irq, sizeof(*gpio->irq),
619 GFP_KERNEL);
620 if (!gpio->irq)
621 return -ENOMEM;
622
623 for (i = 0; i < gpio->num_irq; i++) {
624 err = platform_get_irq(pdev, i);
625 if (err < 0)
626 return err;
627
628 gpio->irq[i] = err;
629 }
630
631 gpio->gpio.label = gpio->soc->name;
632 gpio->gpio.parent = &pdev->dev;
633
634 gpio->gpio.request = gpiochip_generic_request;
635 gpio->gpio.free = gpiochip_generic_free;
636 gpio->gpio.get_direction = tegra186_gpio_get_direction;
637 gpio->gpio.direction_input = tegra186_gpio_direction_input;
638 gpio->gpio.direction_output = tegra186_gpio_direction_output;
639 gpio->gpio.get = tegra186_gpio_get,
640 gpio->gpio.set = tegra186_gpio_set;
641 gpio->gpio.set_config = tegra186_gpio_set_config;
642 gpio->gpio.add_pin_ranges = tegra186_gpio_add_pin_ranges;
643
644 gpio->gpio.base = -1;
645
646 for (i = 0; i < gpio->soc->num_ports; i++)
647 gpio->gpio.ngpio += gpio->soc->ports[i].pins;
648
649 names = devm_kcalloc(gpio->gpio.parent, gpio->gpio.ngpio,
650 sizeof(*names), GFP_KERNEL);
651 if (!names)
652 return -ENOMEM;
653
654 for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) {
655 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
656 char *name;
657
658 for (j = 0; j < port->pins; j++) {
659 name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL,
660 "P%s.%02x", port->name, j);
661 if (!name)
662 return -ENOMEM;
663
664 names[offset + j] = name;
665 }
666
667 offset += port->pins;
668 }
669
670 gpio->gpio.names = (const char * const *)names;
671
672 gpio->gpio.of_node = pdev->dev.of_node;
673 gpio->gpio.of_gpio_n_cells = 2;
674 gpio->gpio.of_xlate = tegra186_gpio_of_xlate;
675
676 gpio->intc.name = pdev->dev.of_node->name;
677 gpio->intc.irq_ack = tegra186_irq_ack;
678 gpio->intc.irq_mask = tegra186_irq_mask;
679 gpio->intc.irq_unmask = tegra186_irq_unmask;
680 gpio->intc.irq_set_type = tegra186_irq_set_type;
681 gpio->intc.irq_set_wake = irq_chip_set_wake_parent;
682
683 irq = &gpio->gpio.irq;
684 irq->chip = &gpio->intc;
685 irq->fwnode = of_node_to_fwnode(pdev->dev.of_node);
686 irq->child_to_parent_hwirq = tegra186_gpio_child_to_parent_hwirq;
687 irq->populate_parent_alloc_arg = tegra186_gpio_populate_parent_fwspec;
688 irq->child_offset_to_irq = tegra186_gpio_child_offset_to_irq;
689 irq->child_irq_domain_ops.translate = tegra186_gpio_irq_domain_translate;
690 irq->handler = handle_simple_irq;
691 irq->default_type = IRQ_TYPE_NONE;
692 irq->parent_handler = tegra186_gpio_irq;
693 irq->parent_handler_data = gpio;
694 irq->num_parents = gpio->num_irq;
695 irq->parents = gpio->irq;
696
697 np = of_find_matching_node(NULL, tegra186_pmc_of_match);
698 if (np) {
699 irq->parent_domain = irq_find_host(np);
700 of_node_put(np);
701
702 if (!irq->parent_domain)
703 return -EPROBE_DEFER;
704 }
705
706 tegra186_gpio_init_route_mapping(gpio);
707
708 irq->map = devm_kcalloc(&pdev->dev, gpio->gpio.ngpio,
709 sizeof(*irq->map), GFP_KERNEL);
710 if (!irq->map)
711 return -ENOMEM;
712
713 for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) {
714 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
715
716 for (j = 0; j < port->pins; j++)
717 irq->map[offset + j] = irq->parents[port->bank];
718
719 offset += port->pins;
720 }
721
722 platform_set_drvdata(pdev, gpio);
723
724 err = devm_gpiochip_add_data(&pdev->dev, &gpio->gpio, gpio);
725 if (err < 0)
726 return err;
727
728 return 0;
729}
730
731static int tegra186_gpio_remove(struct platform_device *pdev)
732{
733 return 0;
734}
735
736#define TEGRA186_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
737 [TEGRA186_MAIN_GPIO_PORT_##_name] = { \
738 .name = #_name, \
739 .bank = _bank, \
740 .port = _port, \
741 .pins = _pins, \
742 }
743
744static const struct tegra_gpio_port tegra186_main_ports[] = {
745 TEGRA186_MAIN_GPIO_PORT( A, 2, 0, 7),
746 TEGRA186_MAIN_GPIO_PORT( B, 3, 0, 7),
747 TEGRA186_MAIN_GPIO_PORT( C, 3, 1, 7),
748 TEGRA186_MAIN_GPIO_PORT( D, 3, 2, 6),
749 TEGRA186_MAIN_GPIO_PORT( E, 2, 1, 8),
750 TEGRA186_MAIN_GPIO_PORT( F, 2, 2, 6),
751 TEGRA186_MAIN_GPIO_PORT( G, 4, 1, 6),
752 TEGRA186_MAIN_GPIO_PORT( H, 1, 0, 7),
753 TEGRA186_MAIN_GPIO_PORT( I, 0, 4, 8),
754 TEGRA186_MAIN_GPIO_PORT( J, 5, 0, 8),
755 TEGRA186_MAIN_GPIO_PORT( K, 5, 1, 1),
756 TEGRA186_MAIN_GPIO_PORT( L, 1, 1, 8),
757 TEGRA186_MAIN_GPIO_PORT( M, 5, 3, 6),
758 TEGRA186_MAIN_GPIO_PORT( N, 0, 0, 7),
759 TEGRA186_MAIN_GPIO_PORT( O, 0, 1, 4),
760 TEGRA186_MAIN_GPIO_PORT( P, 4, 0, 7),
761 TEGRA186_MAIN_GPIO_PORT( Q, 0, 2, 6),
762 TEGRA186_MAIN_GPIO_PORT( R, 0, 5, 6),
763 TEGRA186_MAIN_GPIO_PORT( T, 0, 3, 4),
764 TEGRA186_MAIN_GPIO_PORT( X, 1, 2, 8),
765 TEGRA186_MAIN_GPIO_PORT( Y, 1, 3, 7),
766 TEGRA186_MAIN_GPIO_PORT(BB, 2, 3, 2),
767 TEGRA186_MAIN_GPIO_PORT(CC, 5, 2, 4),
768};
769
770static const struct tegra_gpio_soc tegra186_main_soc = {
771 .num_ports = ARRAY_SIZE(tegra186_main_ports),
772 .ports = tegra186_main_ports,
773 .name = "tegra186-gpio",
774 .instance = 0,
775};
776
777#define TEGRA186_AON_GPIO_PORT(_name, _bank, _port, _pins) \
778 [TEGRA186_AON_GPIO_PORT_##_name] = { \
779 .name = #_name, \
780 .bank = _bank, \
781 .port = _port, \
782 .pins = _pins, \
783 }
784
785static const struct tegra_gpio_port tegra186_aon_ports[] = {
786 TEGRA186_AON_GPIO_PORT( S, 0, 1, 5),
787 TEGRA186_AON_GPIO_PORT( U, 0, 2, 6),
788 TEGRA186_AON_GPIO_PORT( V, 0, 4, 8),
789 TEGRA186_AON_GPIO_PORT( W, 0, 5, 8),
790 TEGRA186_AON_GPIO_PORT( Z, 0, 7, 4),
791 TEGRA186_AON_GPIO_PORT(AA, 0, 6, 8),
792 TEGRA186_AON_GPIO_PORT(EE, 0, 3, 3),
793 TEGRA186_AON_GPIO_PORT(FF, 0, 0, 5),
794};
795
796static const struct tegra_gpio_soc tegra186_aon_soc = {
797 .num_ports = ARRAY_SIZE(tegra186_aon_ports),
798 .ports = tegra186_aon_ports,
799 .name = "tegra186-gpio-aon",
800 .instance = 1,
801};
802
803#define TEGRA194_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
804 [TEGRA194_MAIN_GPIO_PORT_##_name] = { \
805 .name = #_name, \
806 .bank = _bank, \
807 .port = _port, \
808 .pins = _pins, \
809 }
810
811static const struct tegra_gpio_port tegra194_main_ports[] = {
812 TEGRA194_MAIN_GPIO_PORT( A, 1, 2, 8),
813 TEGRA194_MAIN_GPIO_PORT( B, 4, 7, 2),
814 TEGRA194_MAIN_GPIO_PORT( C, 4, 3, 8),
815 TEGRA194_MAIN_GPIO_PORT( D, 4, 4, 4),
816 TEGRA194_MAIN_GPIO_PORT( E, 4, 5, 8),
817 TEGRA194_MAIN_GPIO_PORT( F, 4, 6, 6),
818 TEGRA194_MAIN_GPIO_PORT( G, 4, 0, 8),
819 TEGRA194_MAIN_GPIO_PORT( H, 4, 1, 8),
820 TEGRA194_MAIN_GPIO_PORT( I, 4, 2, 5),
821 TEGRA194_MAIN_GPIO_PORT( J, 5, 1, 6),
822 TEGRA194_MAIN_GPIO_PORT( K, 3, 0, 8),
823 TEGRA194_MAIN_GPIO_PORT( L, 3, 1, 4),
824 TEGRA194_MAIN_GPIO_PORT( M, 2, 3, 8),
825 TEGRA194_MAIN_GPIO_PORT( N, 2, 4, 3),
826 TEGRA194_MAIN_GPIO_PORT( O, 5, 0, 6),
827 TEGRA194_MAIN_GPIO_PORT( P, 2, 5, 8),
828 TEGRA194_MAIN_GPIO_PORT( Q, 2, 6, 8),
829 TEGRA194_MAIN_GPIO_PORT( R, 2, 7, 6),
830 TEGRA194_MAIN_GPIO_PORT( S, 3, 3, 8),
831 TEGRA194_MAIN_GPIO_PORT( T, 3, 4, 8),
832 TEGRA194_MAIN_GPIO_PORT( U, 3, 5, 1),
833 TEGRA194_MAIN_GPIO_PORT( V, 1, 0, 8),
834 TEGRA194_MAIN_GPIO_PORT( W, 1, 1, 2),
835 TEGRA194_MAIN_GPIO_PORT( X, 2, 0, 8),
836 TEGRA194_MAIN_GPIO_PORT( Y, 2, 1, 8),
837 TEGRA194_MAIN_GPIO_PORT( Z, 2, 2, 8),
838 TEGRA194_MAIN_GPIO_PORT(FF, 3, 2, 2),
839 TEGRA194_MAIN_GPIO_PORT(GG, 0, 0, 2)
840};
841
842static const struct tegra186_pin_range tegra194_main_pin_ranges[] = {
843 { TEGRA194_MAIN_GPIO(GG, 0), "pex_l5_clkreq_n_pgg0" },
844 { TEGRA194_MAIN_GPIO(GG, 1), "pex_l5_rst_n_pgg1" },
845};
846
847static const struct tegra_gpio_soc tegra194_main_soc = {
848 .num_ports = ARRAY_SIZE(tegra194_main_ports),
849 .ports = tegra194_main_ports,
850 .name = "tegra194-gpio",
851 .instance = 0,
852 .num_pin_ranges = ARRAY_SIZE(tegra194_main_pin_ranges),
853 .pin_ranges = tegra194_main_pin_ranges,
854 .pinmux = "nvidia,tegra194-pinmux",
855};
856
857#define TEGRA194_AON_GPIO_PORT(_name, _bank, _port, _pins) \
858 [TEGRA194_AON_GPIO_PORT_##_name] = { \
859 .name = #_name, \
860 .bank = _bank, \
861 .port = _port, \
862 .pins = _pins, \
863 }
864
865static const struct tegra_gpio_port tegra194_aon_ports[] = {
866 TEGRA194_AON_GPIO_PORT(AA, 0, 3, 8),
867 TEGRA194_AON_GPIO_PORT(BB, 0, 4, 4),
868 TEGRA194_AON_GPIO_PORT(CC, 0, 1, 8),
869 TEGRA194_AON_GPIO_PORT(DD, 0, 2, 3),
870 TEGRA194_AON_GPIO_PORT(EE, 0, 0, 7)
871};
872
873static const struct tegra_gpio_soc tegra194_aon_soc = {
874 .num_ports = ARRAY_SIZE(tegra194_aon_ports),
875 .ports = tegra194_aon_ports,
876 .name = "tegra194-gpio-aon",
877 .instance = 1,
878};
879
880static const struct of_device_id tegra186_gpio_of_match[] = {
881 {
882 .compatible = "nvidia,tegra186-gpio",
883 .data = &tegra186_main_soc
884 }, {
885 .compatible = "nvidia,tegra186-gpio-aon",
886 .data = &tegra186_aon_soc
887 }, {
888 .compatible = "nvidia,tegra194-gpio",
889 .data = &tegra194_main_soc
890 }, {
891 .compatible = "nvidia,tegra194-gpio-aon",
892 .data = &tegra194_aon_soc
893 }, {
894 /* sentinel */
895 }
896};
897MODULE_DEVICE_TABLE(of, tegra186_gpio_of_match);
898
899static struct platform_driver tegra186_gpio_driver = {
900 .driver = {
901 .name = "tegra186-gpio",
902 .of_match_table = tegra186_gpio_of_match,
903 },
904 .probe = tegra186_gpio_probe,
905 .remove = tegra186_gpio_remove,
906};
907module_platform_driver(tegra186_gpio_driver);
908
909MODULE_DESCRIPTION("NVIDIA Tegra186 GPIO controller driver");
910MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
911MODULE_LICENSE("GPL v2");
1/*
2 * Copyright (c) 2016-2017 NVIDIA Corporation
3 *
4 * Author: Thierry Reding <treding@nvidia.com>
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 */
10
11#include <linux/gpio/driver.h>
12#include <linux/interrupt.h>
13#include <linux/irq.h>
14#include <linux/module.h>
15#include <linux/of_device.h>
16#include <linux/platform_device.h>
17
18#include <dt-bindings/gpio/tegra186-gpio.h>
19
20#define TEGRA186_GPIO_ENABLE_CONFIG 0x00
21#define TEGRA186_GPIO_ENABLE_CONFIG_ENABLE BIT(0)
22#define TEGRA186_GPIO_ENABLE_CONFIG_OUT BIT(1)
23#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_NONE (0x0 << 2)
24#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL (0x1 << 2)
25#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE (0x2 << 2)
26#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE (0x3 << 2)
27#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK (0x3 << 2)
28#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL BIT(4)
29#define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT BIT(6)
30
31#define TEGRA186_GPIO_DEBOUNCE_CONTROL 0x04
32#define TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(x) ((x) & 0xff)
33
34#define TEGRA186_GPIO_INPUT 0x08
35#define TEGRA186_GPIO_INPUT_HIGH BIT(0)
36
37#define TEGRA186_GPIO_OUTPUT_CONTROL 0x0c
38#define TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED BIT(0)
39
40#define TEGRA186_GPIO_OUTPUT_VALUE 0x10
41#define TEGRA186_GPIO_OUTPUT_VALUE_HIGH BIT(0)
42
43#define TEGRA186_GPIO_INTERRUPT_CLEAR 0x14
44
45#define TEGRA186_GPIO_INTERRUPT_STATUS(x) (0x100 + (x) * 4)
46
47struct tegra_gpio_port {
48 const char *name;
49 unsigned int offset;
50 unsigned int pins;
51 unsigned int irq;
52};
53
54struct tegra_gpio_soc {
55 const struct tegra_gpio_port *ports;
56 unsigned int num_ports;
57 const char *name;
58};
59
60struct tegra_gpio {
61 struct gpio_chip gpio;
62 struct irq_chip intc;
63 unsigned int num_irq;
64 unsigned int *irq;
65
66 const struct tegra_gpio_soc *soc;
67
68 void __iomem *base;
69};
70
71static const struct tegra_gpio_port *
72tegra186_gpio_get_port(struct tegra_gpio *gpio, unsigned int *pin)
73{
74 unsigned int start = 0, i;
75
76 for (i = 0; i < gpio->soc->num_ports; i++) {
77 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
78
79 if (*pin >= start && *pin < start + port->pins) {
80 *pin -= start;
81 return port;
82 }
83
84 start += port->pins;
85 }
86
87 return NULL;
88}
89
90static void __iomem *tegra186_gpio_get_base(struct tegra_gpio *gpio,
91 unsigned int pin)
92{
93 const struct tegra_gpio_port *port;
94
95 port = tegra186_gpio_get_port(gpio, &pin);
96 if (!port)
97 return NULL;
98
99 return gpio->base + port->offset + pin * 0x20;
100}
101
102static int tegra186_gpio_get_direction(struct gpio_chip *chip,
103 unsigned int offset)
104{
105 struct tegra_gpio *gpio = gpiochip_get_data(chip);
106 void __iomem *base;
107 u32 value;
108
109 base = tegra186_gpio_get_base(gpio, offset);
110 if (WARN_ON(base == NULL))
111 return -ENODEV;
112
113 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
114 if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT)
115 return 0;
116
117 return 1;
118}
119
120static int tegra186_gpio_direction_input(struct gpio_chip *chip,
121 unsigned int offset)
122{
123 struct tegra_gpio *gpio = gpiochip_get_data(chip);
124 void __iomem *base;
125 u32 value;
126
127 base = tegra186_gpio_get_base(gpio, offset);
128 if (WARN_ON(base == NULL))
129 return -ENODEV;
130
131 value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL);
132 value |= TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED;
133 writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL);
134
135 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
136 value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE;
137 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_OUT;
138 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
139
140 return 0;
141}
142
143static int tegra186_gpio_direction_output(struct gpio_chip *chip,
144 unsigned int offset, int level)
145{
146 struct tegra_gpio *gpio = gpiochip_get_data(chip);
147 void __iomem *base;
148 u32 value;
149
150 /* configure output level first */
151 chip->set(chip, offset, level);
152
153 base = tegra186_gpio_get_base(gpio, offset);
154 if (WARN_ON(base == NULL))
155 return -EINVAL;
156
157 /* set the direction */
158 value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL);
159 value &= ~TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED;
160 writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL);
161
162 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
163 value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE;
164 value |= TEGRA186_GPIO_ENABLE_CONFIG_OUT;
165 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
166
167 return 0;
168}
169
170static int tegra186_gpio_get(struct gpio_chip *chip, unsigned int offset)
171{
172 struct tegra_gpio *gpio = gpiochip_get_data(chip);
173 void __iomem *base;
174 u32 value;
175
176 base = tegra186_gpio_get_base(gpio, offset);
177 if (WARN_ON(base == NULL))
178 return -ENODEV;
179
180 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
181 if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT)
182 value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE);
183 else
184 value = readl(base + TEGRA186_GPIO_INPUT);
185
186 return value & BIT(0);
187}
188
189static void tegra186_gpio_set(struct gpio_chip *chip, unsigned int offset,
190 int level)
191{
192 struct tegra_gpio *gpio = gpiochip_get_data(chip);
193 void __iomem *base;
194 u32 value;
195
196 base = tegra186_gpio_get_base(gpio, offset);
197 if (WARN_ON(base == NULL))
198 return;
199
200 value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE);
201 if (level == 0)
202 value &= ~TEGRA186_GPIO_OUTPUT_VALUE_HIGH;
203 else
204 value |= TEGRA186_GPIO_OUTPUT_VALUE_HIGH;
205
206 writel(value, base + TEGRA186_GPIO_OUTPUT_VALUE);
207}
208
209static int tegra186_gpio_of_xlate(struct gpio_chip *chip,
210 const struct of_phandle_args *spec,
211 u32 *flags)
212{
213 struct tegra_gpio *gpio = gpiochip_get_data(chip);
214 unsigned int port, pin, i, offset = 0;
215
216 if (WARN_ON(chip->of_gpio_n_cells < 2))
217 return -EINVAL;
218
219 if (WARN_ON(spec->args_count < chip->of_gpio_n_cells))
220 return -EINVAL;
221
222 port = spec->args[0] / 8;
223 pin = spec->args[0] % 8;
224
225 if (port >= gpio->soc->num_ports) {
226 dev_err(chip->parent, "invalid port number: %u\n", port);
227 return -EINVAL;
228 }
229
230 for (i = 0; i < port; i++)
231 offset += gpio->soc->ports[i].pins;
232
233 if (flags)
234 *flags = spec->args[1];
235
236 return offset + pin;
237}
238
239static void tegra186_irq_ack(struct irq_data *data)
240{
241 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
242 void __iomem *base;
243
244 base = tegra186_gpio_get_base(gpio, data->hwirq);
245 if (WARN_ON(base == NULL))
246 return;
247
248 writel(1, base + TEGRA186_GPIO_INTERRUPT_CLEAR);
249}
250
251static void tegra186_irq_mask(struct irq_data *data)
252{
253 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
254 void __iomem *base;
255 u32 value;
256
257 base = tegra186_gpio_get_base(gpio, data->hwirq);
258 if (WARN_ON(base == NULL))
259 return;
260
261 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
262 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT;
263 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
264}
265
266static void tegra186_irq_unmask(struct irq_data *data)
267{
268 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
269 void __iomem *base;
270 u32 value;
271
272 base = tegra186_gpio_get_base(gpio, data->hwirq);
273 if (WARN_ON(base == NULL))
274 return;
275
276 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
277 value |= TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT;
278 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
279}
280
281static int tegra186_irq_set_type(struct irq_data *data, unsigned int flow)
282{
283 struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data);
284 void __iomem *base;
285 u32 value;
286
287 base = tegra186_gpio_get_base(gpio, data->hwirq);
288 if (WARN_ON(base == NULL))
289 return -ENODEV;
290
291 value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
292 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK;
293 value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL;
294
295 switch (flow & IRQ_TYPE_SENSE_MASK) {
296 case IRQ_TYPE_NONE:
297 break;
298
299 case IRQ_TYPE_EDGE_RISING:
300 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE;
301 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL;
302 break;
303
304 case IRQ_TYPE_EDGE_FALLING:
305 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE;
306 break;
307
308 case IRQ_TYPE_EDGE_BOTH:
309 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE;
310 break;
311
312 case IRQ_TYPE_LEVEL_HIGH:
313 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL;
314 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL;
315 break;
316
317 case IRQ_TYPE_LEVEL_LOW:
318 value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL;
319 break;
320
321 default:
322 return -EINVAL;
323 }
324
325 writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
326
327 if ((flow & IRQ_TYPE_EDGE_BOTH) == 0)
328 irq_set_handler_locked(data, handle_level_irq);
329 else
330 irq_set_handler_locked(data, handle_edge_irq);
331
332 return 0;
333}
334
335static void tegra186_gpio_irq(struct irq_desc *desc)
336{
337 struct tegra_gpio *gpio = irq_desc_get_handler_data(desc);
338 struct irq_domain *domain = gpio->gpio.irq.domain;
339 struct irq_chip *chip = irq_desc_get_chip(desc);
340 unsigned int parent = irq_desc_get_irq(desc);
341 unsigned int i, offset = 0;
342
343 chained_irq_enter(chip, desc);
344
345 for (i = 0; i < gpio->soc->num_ports; i++) {
346 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
347 void __iomem *base = gpio->base + port->offset;
348 unsigned int pin, irq;
349 unsigned long value;
350
351 /* skip ports that are not associated with this controller */
352 if (parent != gpio->irq[port->irq])
353 goto skip;
354
355 value = readl(base + TEGRA186_GPIO_INTERRUPT_STATUS(1));
356
357 for_each_set_bit(pin, &value, port->pins) {
358 irq = irq_find_mapping(domain, offset + pin);
359 if (WARN_ON(irq == 0))
360 continue;
361
362 generic_handle_irq(irq);
363 }
364
365skip:
366 offset += port->pins;
367 }
368
369 chained_irq_exit(chip, desc);
370}
371
372static int tegra186_gpio_irq_domain_xlate(struct irq_domain *domain,
373 struct device_node *np,
374 const u32 *spec, unsigned int size,
375 unsigned long *hwirq,
376 unsigned int *type)
377{
378 struct tegra_gpio *gpio = gpiochip_get_data(domain->host_data);
379 unsigned int port, pin, i, offset = 0;
380
381 if (size < 2)
382 return -EINVAL;
383
384 port = spec[0] / 8;
385 pin = spec[0] % 8;
386
387 if (port >= gpio->soc->num_ports) {
388 dev_err(gpio->gpio.parent, "invalid port number: %u\n", port);
389 return -EINVAL;
390 }
391
392 for (i = 0; i < port; i++)
393 offset += gpio->soc->ports[i].pins;
394
395 *type = spec[1] & IRQ_TYPE_SENSE_MASK;
396 *hwirq = offset + pin;
397
398 return 0;
399}
400
401static const struct irq_domain_ops tegra186_gpio_irq_domain_ops = {
402 .map = gpiochip_irq_map,
403 .unmap = gpiochip_irq_unmap,
404 .xlate = tegra186_gpio_irq_domain_xlate,
405};
406
407static int tegra186_gpio_probe(struct platform_device *pdev)
408{
409 unsigned int i, j, offset;
410 struct gpio_irq_chip *irq;
411 struct tegra_gpio *gpio;
412 struct resource *res;
413 char **names;
414 int err;
415
416 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
417 if (!gpio)
418 return -ENOMEM;
419
420 gpio->soc = of_device_get_match_data(&pdev->dev);
421
422 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gpio");
423 gpio->base = devm_ioremap_resource(&pdev->dev, res);
424 if (IS_ERR(gpio->base))
425 return PTR_ERR(gpio->base);
426
427 err = platform_irq_count(pdev);
428 if (err < 0)
429 return err;
430
431 gpio->num_irq = err;
432
433 gpio->irq = devm_kcalloc(&pdev->dev, gpio->num_irq, sizeof(*gpio->irq),
434 GFP_KERNEL);
435 if (!gpio->irq)
436 return -ENOMEM;
437
438 for (i = 0; i < gpio->num_irq; i++) {
439 err = platform_get_irq(pdev, i);
440 if (err < 0)
441 return err;
442
443 gpio->irq[i] = err;
444 }
445
446 gpio->gpio.label = gpio->soc->name;
447 gpio->gpio.parent = &pdev->dev;
448
449 gpio->gpio.get_direction = tegra186_gpio_get_direction;
450 gpio->gpio.direction_input = tegra186_gpio_direction_input;
451 gpio->gpio.direction_output = tegra186_gpio_direction_output;
452 gpio->gpio.get = tegra186_gpio_get,
453 gpio->gpio.set = tegra186_gpio_set;
454
455 gpio->gpio.base = -1;
456
457 for (i = 0; i < gpio->soc->num_ports; i++)
458 gpio->gpio.ngpio += gpio->soc->ports[i].pins;
459
460 names = devm_kcalloc(gpio->gpio.parent, gpio->gpio.ngpio,
461 sizeof(*names), GFP_KERNEL);
462 if (!names)
463 return -ENOMEM;
464
465 for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) {
466 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
467 char *name;
468
469 for (j = 0; j < port->pins; j++) {
470 name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL,
471 "P%s.%02x", port->name, j);
472 if (!name)
473 return -ENOMEM;
474
475 names[offset + j] = name;
476 }
477
478 offset += port->pins;
479 }
480
481 gpio->gpio.names = (const char * const *)names;
482
483 gpio->gpio.of_node = pdev->dev.of_node;
484 gpio->gpio.of_gpio_n_cells = 2;
485 gpio->gpio.of_xlate = tegra186_gpio_of_xlate;
486
487 gpio->intc.name = pdev->dev.of_node->name;
488 gpio->intc.irq_ack = tegra186_irq_ack;
489 gpio->intc.irq_mask = tegra186_irq_mask;
490 gpio->intc.irq_unmask = tegra186_irq_unmask;
491 gpio->intc.irq_set_type = tegra186_irq_set_type;
492
493 irq = &gpio->gpio.irq;
494 irq->chip = &gpio->intc;
495 irq->domain_ops = &tegra186_gpio_irq_domain_ops;
496 irq->handler = handle_simple_irq;
497 irq->default_type = IRQ_TYPE_NONE;
498 irq->parent_handler = tegra186_gpio_irq;
499 irq->parent_handler_data = gpio;
500 irq->num_parents = gpio->num_irq;
501 irq->parents = gpio->irq;
502
503 irq->map = devm_kcalloc(&pdev->dev, gpio->gpio.ngpio,
504 sizeof(*irq->map), GFP_KERNEL);
505 if (!irq->map)
506 return -ENOMEM;
507
508 for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) {
509 const struct tegra_gpio_port *port = &gpio->soc->ports[i];
510
511 for (j = 0; j < port->pins; j++)
512 irq->map[offset + j] = irq->parents[port->irq];
513
514 offset += port->pins;
515 }
516
517 platform_set_drvdata(pdev, gpio);
518
519 err = devm_gpiochip_add_data(&pdev->dev, &gpio->gpio, gpio);
520 if (err < 0)
521 return err;
522
523 return 0;
524}
525
526static int tegra186_gpio_remove(struct platform_device *pdev)
527{
528 return 0;
529}
530
531#define TEGRA_MAIN_GPIO_PORT(port, base, count, controller) \
532 [TEGRA_MAIN_GPIO_PORT_##port] = { \
533 .name = #port, \
534 .offset = base, \
535 .pins = count, \
536 .irq = controller, \
537 }
538
539static const struct tegra_gpio_port tegra186_main_ports[] = {
540 TEGRA_MAIN_GPIO_PORT( A, 0x2000, 7, 2),
541 TEGRA_MAIN_GPIO_PORT( B, 0x3000, 7, 3),
542 TEGRA_MAIN_GPIO_PORT( C, 0x3200, 7, 3),
543 TEGRA_MAIN_GPIO_PORT( D, 0x3400, 6, 3),
544 TEGRA_MAIN_GPIO_PORT( E, 0x2200, 8, 2),
545 TEGRA_MAIN_GPIO_PORT( F, 0x2400, 6, 2),
546 TEGRA_MAIN_GPIO_PORT( G, 0x4200, 6, 4),
547 TEGRA_MAIN_GPIO_PORT( H, 0x1000, 7, 1),
548 TEGRA_MAIN_GPIO_PORT( I, 0x0800, 8, 0),
549 TEGRA_MAIN_GPIO_PORT( J, 0x5000, 8, 5),
550 TEGRA_MAIN_GPIO_PORT( K, 0x5200, 1, 5),
551 TEGRA_MAIN_GPIO_PORT( L, 0x1200, 8, 1),
552 TEGRA_MAIN_GPIO_PORT( M, 0x5600, 6, 5),
553 TEGRA_MAIN_GPIO_PORT( N, 0x0000, 7, 0),
554 TEGRA_MAIN_GPIO_PORT( O, 0x0200, 4, 0),
555 TEGRA_MAIN_GPIO_PORT( P, 0x4000, 7, 4),
556 TEGRA_MAIN_GPIO_PORT( Q, 0x0400, 6, 0),
557 TEGRA_MAIN_GPIO_PORT( R, 0x0a00, 6, 0),
558 TEGRA_MAIN_GPIO_PORT( T, 0x0600, 4, 0),
559 TEGRA_MAIN_GPIO_PORT( X, 0x1400, 8, 1),
560 TEGRA_MAIN_GPIO_PORT( Y, 0x1600, 7, 1),
561 TEGRA_MAIN_GPIO_PORT(BB, 0x2600, 2, 2),
562 TEGRA_MAIN_GPIO_PORT(CC, 0x5400, 4, 5),
563};
564
565static const struct tegra_gpio_soc tegra186_main_soc = {
566 .num_ports = ARRAY_SIZE(tegra186_main_ports),
567 .ports = tegra186_main_ports,
568 .name = "tegra186-gpio",
569};
570
571#define TEGRA_AON_GPIO_PORT(port, base, count, controller) \
572 [TEGRA_AON_GPIO_PORT_##port] = { \
573 .name = #port, \
574 .offset = base, \
575 .pins = count, \
576 .irq = controller, \
577 }
578
579static const struct tegra_gpio_port tegra186_aon_ports[] = {
580 TEGRA_AON_GPIO_PORT( S, 0x0200, 5, 0),
581 TEGRA_AON_GPIO_PORT( U, 0x0400, 6, 0),
582 TEGRA_AON_GPIO_PORT( V, 0x0800, 8, 0),
583 TEGRA_AON_GPIO_PORT( W, 0x0a00, 8, 0),
584 TEGRA_AON_GPIO_PORT( Z, 0x0e00, 4, 0),
585 TEGRA_AON_GPIO_PORT(AA, 0x0c00, 8, 0),
586 TEGRA_AON_GPIO_PORT(EE, 0x0600, 3, 0),
587 TEGRA_AON_GPIO_PORT(FF, 0x0000, 5, 0),
588};
589
590static const struct tegra_gpio_soc tegra186_aon_soc = {
591 .num_ports = ARRAY_SIZE(tegra186_aon_ports),
592 .ports = tegra186_aon_ports,
593 .name = "tegra186-gpio-aon",
594};
595
596static const struct of_device_id tegra186_gpio_of_match[] = {
597 {
598 .compatible = "nvidia,tegra186-gpio",
599 .data = &tegra186_main_soc
600 }, {
601 .compatible = "nvidia,tegra186-gpio-aon",
602 .data = &tegra186_aon_soc
603 }, {
604 /* sentinel */
605 }
606};
607
608static struct platform_driver tegra186_gpio_driver = {
609 .driver = {
610 .name = "tegra186-gpio",
611 .of_match_table = tegra186_gpio_of_match,
612 },
613 .probe = tegra186_gpio_probe,
614 .remove = tegra186_gpio_remove,
615};
616module_platform_driver(tegra186_gpio_driver);
617
618MODULE_DESCRIPTION("NVIDIA Tegra186 GPIO controller driver");
619MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
620MODULE_LICENSE("GPL v2");