Commit | Line | Data |
---|---|---|
3c92db9a EG |
1 | /* |
2 | * arch/arm/mach-tegra/gpio.c | |
3 | * | |
4 | * Copyright (c) 2010 Google, Inc | |
5 | * | |
6 | * Author: | |
7 | * Erik Gilling <konkers@google.com> | |
8 | * | |
9 | * This software is licensed under the terms of the GNU General Public | |
10 | * License version 2, as published by the Free Software Foundation, and | |
11 | * may be copied, distributed, and modified under those terms. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/init.h> | |
21 | #include <linux/irq.h> | |
2e47b8b3 | 22 | #include <linux/interrupt.h> |
3c92db9a EG |
23 | #include <linux/io.h> |
24 | #include <linux/gpio.h> | |
5c1e2c9d | 25 | #include <linux/of_device.h> |
88d8951e SW |
26 | #include <linux/platform_device.h> |
27 | #include <linux/module.h> | |
6f74dc9b | 28 | #include <linux/irqdomain.h> |
3e215d0a | 29 | #include <linux/pinctrl/consumer.h> |
3c92db9a | 30 | |
98022940 WD |
31 | #include <asm/mach/irq.h> |
32 | ||
3c92db9a | 33 | #include <mach/iomap.h> |
2ea67fd1 | 34 | #include <mach/suspend.h> |
3c92db9a EG |
35 | |
36 | #define GPIO_BANK(x) ((x) >> 5) | |
37 | #define GPIO_PORT(x) (((x) >> 3) & 0x3) | |
38 | #define GPIO_BIT(x) ((x) & 0x7) | |
39 | ||
5c1e2c9d SW |
40 | #define GPIO_REG(x) (GPIO_BANK(x) * tegra_gpio_bank_stride + \ |
41 | GPIO_PORT(x) * 4) | |
3c92db9a EG |
42 | |
43 | #define GPIO_CNF(x) (GPIO_REG(x) + 0x00) | |
44 | #define GPIO_OE(x) (GPIO_REG(x) + 0x10) | |
45 | #define GPIO_OUT(x) (GPIO_REG(x) + 0X20) | |
46 | #define GPIO_IN(x) (GPIO_REG(x) + 0x30) | |
47 | #define GPIO_INT_STA(x) (GPIO_REG(x) + 0x40) | |
48 | #define GPIO_INT_ENB(x) (GPIO_REG(x) + 0x50) | |
49 | #define GPIO_INT_LVL(x) (GPIO_REG(x) + 0x60) | |
50 | #define GPIO_INT_CLR(x) (GPIO_REG(x) + 0x70) | |
51 | ||
5c1e2c9d SW |
52 | #define GPIO_MSK_CNF(x) (GPIO_REG(x) + tegra_gpio_upper_offset + 0x00) |
53 | #define GPIO_MSK_OE(x) (GPIO_REG(x) + tegra_gpio_upper_offset + 0x10) | |
54 | #define GPIO_MSK_OUT(x) (GPIO_REG(x) + tegra_gpio_upper_offset + 0X20) | |
55 | #define GPIO_MSK_INT_STA(x) (GPIO_REG(x) + tegra_gpio_upper_offset + 0x40) | |
56 | #define GPIO_MSK_INT_ENB(x) (GPIO_REG(x) + tegra_gpio_upper_offset + 0x50) | |
57 | #define GPIO_MSK_INT_LVL(x) (GPIO_REG(x) + tegra_gpio_upper_offset + 0x60) | |
3c92db9a EG |
58 | |
59 | #define GPIO_INT_LVL_MASK 0x010101 | |
60 | #define GPIO_INT_LVL_EDGE_RISING 0x000101 | |
61 | #define GPIO_INT_LVL_EDGE_FALLING 0x000100 | |
62 | #define GPIO_INT_LVL_EDGE_BOTH 0x010100 | |
63 | #define GPIO_INT_LVL_LEVEL_HIGH 0x000001 | |
64 | #define GPIO_INT_LVL_LEVEL_LOW 0x000000 | |
65 | ||
66 | struct tegra_gpio_bank { | |
67 | int bank; | |
68 | int irq; | |
69 | spinlock_t lvl_lock[4]; | |
2e47b8b3 CC |
70 | #ifdef CONFIG_PM |
71 | u32 cnf[4]; | |
72 | u32 out[4]; | |
73 | u32 oe[4]; | |
74 | u32 int_enb[4]; | |
75 | u32 int_lvl[4]; | |
76 | #endif | |
3c92db9a EG |
77 | }; |
78 | ||
bdc93a77 | 79 | static struct irq_domain *irq_domain; |
88d8951e | 80 | static void __iomem *regs; |
3391811c | 81 | static u32 tegra_gpio_bank_count; |
5c1e2c9d SW |
82 | static u32 tegra_gpio_bank_stride; |
83 | static u32 tegra_gpio_upper_offset; | |
3391811c | 84 | static struct tegra_gpio_bank *tegra_gpio_banks; |
88d8951e SW |
85 | |
86 | static inline void tegra_gpio_writel(u32 val, u32 reg) | |
87 | { | |
88 | __raw_writel(val, regs + reg); | |
89 | } | |
90 | ||
91 | static inline u32 tegra_gpio_readl(u32 reg) | |
92 | { | |
93 | return __raw_readl(regs + reg); | |
94 | } | |
3c92db9a EG |
95 | |
96 | static int tegra_gpio_compose(int bank, int port, int bit) | |
97 | { | |
98 | return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7); | |
99 | } | |
100 | ||
101 | static void tegra_gpio_mask_write(u32 reg, int gpio, int value) | |
102 | { | |
103 | u32 val; | |
104 | ||
105 | val = 0x100 << GPIO_BIT(gpio); | |
106 | if (value) | |
107 | val |= 1 << GPIO_BIT(gpio); | |
88d8951e | 108 | tegra_gpio_writel(val, reg); |
3c92db9a EG |
109 | } |
110 | ||
3e215d0a | 111 | static void tegra_gpio_enable(int gpio) |
3c92db9a EG |
112 | { |
113 | tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 1); | |
114 | } | |
691e06c0 | 115 | EXPORT_SYMBOL_GPL(tegra_gpio_enable); |
3c92db9a | 116 | |
3e215d0a | 117 | static void tegra_gpio_disable(int gpio) |
3c92db9a EG |
118 | { |
119 | tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 0); | |
120 | } | |
691e06c0 | 121 | EXPORT_SYMBOL_GPL(tegra_gpio_disable); |
3c92db9a | 122 | |
3e215d0a SW |
123 | int tegra_gpio_request(struct gpio_chip *chip, unsigned offset) |
124 | { | |
125 | return pinctrl_request_gpio(offset); | |
126 | } | |
127 | ||
128 | void tegra_gpio_free(struct gpio_chip *chip, unsigned offset) | |
129 | { | |
130 | pinctrl_free_gpio(offset); | |
131 | tegra_gpio_disable(offset); | |
132 | } | |
133 | ||
3c92db9a EG |
134 | static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
135 | { | |
136 | tegra_gpio_mask_write(GPIO_MSK_OUT(offset), offset, value); | |
137 | } | |
138 | ||
139 | static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset) | |
140 | { | |
88d8951e | 141 | return (tegra_gpio_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1; |
3c92db9a EG |
142 | } |
143 | ||
144 | static int tegra_gpio_direction_input(struct gpio_chip *chip, unsigned offset) | |
145 | { | |
146 | tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 0); | |
3e215d0a | 147 | tegra_gpio_enable(offset); |
3c92db9a EG |
148 | return 0; |
149 | } | |
150 | ||
151 | static int tegra_gpio_direction_output(struct gpio_chip *chip, unsigned offset, | |
152 | int value) | |
153 | { | |
154 | tegra_gpio_set(chip, offset, value); | |
155 | tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 1); | |
3e215d0a | 156 | tegra_gpio_enable(offset); |
3c92db9a EG |
157 | return 0; |
158 | } | |
159 | ||
438a99c0 SW |
160 | static int tegra_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
161 | { | |
bdc93a77 | 162 | return irq_find_mapping(irq_domain, offset); |
438a99c0 | 163 | } |
3c92db9a EG |
164 | |
165 | static struct gpio_chip tegra_gpio_chip = { | |
166 | .label = "tegra-gpio", | |
3e215d0a SW |
167 | .request = tegra_gpio_request, |
168 | .free = tegra_gpio_free, | |
3c92db9a EG |
169 | .direction_input = tegra_gpio_direction_input, |
170 | .get = tegra_gpio_get, | |
171 | .direction_output = tegra_gpio_direction_output, | |
172 | .set = tegra_gpio_set, | |
438a99c0 | 173 | .to_irq = tegra_gpio_to_irq, |
3c92db9a | 174 | .base = 0, |
3c92db9a EG |
175 | }; |
176 | ||
37337a8d | 177 | static void tegra_gpio_irq_ack(struct irq_data *d) |
3c92db9a | 178 | { |
6f74dc9b | 179 | int gpio = d->hwirq; |
3c92db9a | 180 | |
88d8951e | 181 | tegra_gpio_writel(1 << GPIO_BIT(gpio), GPIO_INT_CLR(gpio)); |
3c92db9a EG |
182 | } |
183 | ||
37337a8d | 184 | static void tegra_gpio_irq_mask(struct irq_data *d) |
3c92db9a | 185 | { |
6f74dc9b | 186 | int gpio = d->hwirq; |
3c92db9a EG |
187 | |
188 | tegra_gpio_mask_write(GPIO_MSK_INT_ENB(gpio), gpio, 0); | |
189 | } | |
190 | ||
37337a8d | 191 | static void tegra_gpio_irq_unmask(struct irq_data *d) |
3c92db9a | 192 | { |
6f74dc9b | 193 | int gpio = d->hwirq; |
3c92db9a EG |
194 | |
195 | tegra_gpio_mask_write(GPIO_MSK_INT_ENB(gpio), gpio, 1); | |
196 | } | |
197 | ||
37337a8d | 198 | static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type) |
3c92db9a | 199 | { |
6f74dc9b | 200 | int gpio = d->hwirq; |
37337a8d | 201 | struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d); |
3c92db9a EG |
202 | int port = GPIO_PORT(gpio); |
203 | int lvl_type; | |
204 | int val; | |
205 | unsigned long flags; | |
206 | ||
207 | switch (type & IRQ_TYPE_SENSE_MASK) { | |
208 | case IRQ_TYPE_EDGE_RISING: | |
209 | lvl_type = GPIO_INT_LVL_EDGE_RISING; | |
210 | break; | |
211 | ||
212 | case IRQ_TYPE_EDGE_FALLING: | |
213 | lvl_type = GPIO_INT_LVL_EDGE_FALLING; | |
214 | break; | |
215 | ||
216 | case IRQ_TYPE_EDGE_BOTH: | |
217 | lvl_type = GPIO_INT_LVL_EDGE_BOTH; | |
218 | break; | |
219 | ||
220 | case IRQ_TYPE_LEVEL_HIGH: | |
221 | lvl_type = GPIO_INT_LVL_LEVEL_HIGH; | |
222 | break; | |
223 | ||
224 | case IRQ_TYPE_LEVEL_LOW: | |
225 | lvl_type = GPIO_INT_LVL_LEVEL_LOW; | |
226 | break; | |
227 | ||
228 | default: | |
229 | return -EINVAL; | |
230 | } | |
231 | ||
232 | spin_lock_irqsave(&bank->lvl_lock[port], flags); | |
233 | ||
88d8951e | 234 | val = tegra_gpio_readl(GPIO_INT_LVL(gpio)); |
3c92db9a EG |
235 | val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio)); |
236 | val |= lvl_type << GPIO_BIT(gpio); | |
88d8951e | 237 | tegra_gpio_writel(val, GPIO_INT_LVL(gpio)); |
3c92db9a EG |
238 | |
239 | spin_unlock_irqrestore(&bank->lvl_lock[port], flags); | |
240 | ||
d941136f SW |
241 | tegra_gpio_mask_write(GPIO_MSK_OE(gpio), gpio, 0); |
242 | tegra_gpio_enable(gpio); | |
243 | ||
3c92db9a | 244 | if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) |
6845664a | 245 | __irq_set_handler_locked(d->irq, handle_level_irq); |
3c92db9a | 246 | else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) |
6845664a | 247 | __irq_set_handler_locked(d->irq, handle_edge_irq); |
3c92db9a EG |
248 | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) | |
253 | { | |
254 | struct tegra_gpio_bank *bank; | |
255 | int port; | |
256 | int pin; | |
257 | int unmasked = 0; | |
98022940 | 258 | struct irq_chip *chip = irq_desc_get_chip(desc); |
3c92db9a | 259 | |
98022940 | 260 | chained_irq_enter(chip, desc); |
3c92db9a | 261 | |
6845664a | 262 | bank = irq_get_handler_data(irq); |
3c92db9a EG |
263 | |
264 | for (port = 0; port < 4; port++) { | |
265 | int gpio = tegra_gpio_compose(bank->bank, port, 0); | |
88d8951e SW |
266 | unsigned long sta = tegra_gpio_readl(GPIO_INT_STA(gpio)) & |
267 | tegra_gpio_readl(GPIO_INT_ENB(gpio)); | |
268 | u32 lvl = tegra_gpio_readl(GPIO_INT_LVL(gpio)); | |
3c92db9a EG |
269 | |
270 | for_each_set_bit(pin, &sta, 8) { | |
88d8951e | 271 | tegra_gpio_writel(1 << pin, GPIO_INT_CLR(gpio)); |
3c92db9a EG |
272 | |
273 | /* if gpio is edge triggered, clear condition | |
274 | * before executing the hander so that we don't | |
275 | * miss edges | |
276 | */ | |
277 | if (lvl & (0x100 << pin)) { | |
278 | unmasked = 1; | |
98022940 | 279 | chained_irq_exit(chip, desc); |
3c92db9a EG |
280 | } |
281 | ||
282 | generic_handle_irq(gpio_to_irq(gpio + pin)); | |
283 | } | |
284 | } | |
285 | ||
286 | if (!unmasked) | |
98022940 | 287 | chained_irq_exit(chip, desc); |
3c92db9a EG |
288 | |
289 | } | |
290 | ||
2e47b8b3 CC |
291 | #ifdef CONFIG_PM |
292 | void tegra_gpio_resume(void) | |
293 | { | |
294 | unsigned long flags; | |
c8309ef6 CC |
295 | int b; |
296 | int p; | |
2e47b8b3 CC |
297 | |
298 | local_irq_save(flags); | |
299 | ||
3391811c | 300 | for (b = 0; b < tegra_gpio_bank_count; b++) { |
2e47b8b3 CC |
301 | struct tegra_gpio_bank *bank = &tegra_gpio_banks[b]; |
302 | ||
303 | for (p = 0; p < ARRAY_SIZE(bank->oe); p++) { | |
304 | unsigned int gpio = (b<<5) | (p<<3); | |
88d8951e SW |
305 | tegra_gpio_writel(bank->cnf[p], GPIO_CNF(gpio)); |
306 | tegra_gpio_writel(bank->out[p], GPIO_OUT(gpio)); | |
307 | tegra_gpio_writel(bank->oe[p], GPIO_OE(gpio)); | |
308 | tegra_gpio_writel(bank->int_lvl[p], GPIO_INT_LVL(gpio)); | |
309 | tegra_gpio_writel(bank->int_enb[p], GPIO_INT_ENB(gpio)); | |
2e47b8b3 CC |
310 | } |
311 | } | |
312 | ||
313 | local_irq_restore(flags); | |
2e47b8b3 CC |
314 | } |
315 | ||
316 | void tegra_gpio_suspend(void) | |
317 | { | |
318 | unsigned long flags; | |
c8309ef6 CC |
319 | int b; |
320 | int p; | |
2e47b8b3 | 321 | |
2e47b8b3 | 322 | local_irq_save(flags); |
3391811c | 323 | for (b = 0; b < tegra_gpio_bank_count; b++) { |
2e47b8b3 CC |
324 | struct tegra_gpio_bank *bank = &tegra_gpio_banks[b]; |
325 | ||
326 | for (p = 0; p < ARRAY_SIZE(bank->oe); p++) { | |
327 | unsigned int gpio = (b<<5) | (p<<3); | |
88d8951e SW |
328 | bank->cnf[p] = tegra_gpio_readl(GPIO_CNF(gpio)); |
329 | bank->out[p] = tegra_gpio_readl(GPIO_OUT(gpio)); | |
330 | bank->oe[p] = tegra_gpio_readl(GPIO_OE(gpio)); | |
331 | bank->int_enb[p] = tegra_gpio_readl(GPIO_INT_ENB(gpio)); | |
332 | bank->int_lvl[p] = tegra_gpio_readl(GPIO_INT_LVL(gpio)); | |
2e47b8b3 CC |
333 | } |
334 | } | |
335 | local_irq_restore(flags); | |
336 | } | |
337 | ||
37337a8d | 338 | static int tegra_gpio_wake_enable(struct irq_data *d, unsigned int enable) |
2e47b8b3 | 339 | { |
37337a8d | 340 | struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d); |
6845664a | 341 | return irq_set_irq_wake(bank->irq, enable); |
2e47b8b3 CC |
342 | } |
343 | #endif | |
3c92db9a EG |
344 | |
345 | static struct irq_chip tegra_gpio_irq_chip = { | |
346 | .name = "GPIO", | |
37337a8d LB |
347 | .irq_ack = tegra_gpio_irq_ack, |
348 | .irq_mask = tegra_gpio_irq_mask, | |
349 | .irq_unmask = tegra_gpio_irq_unmask, | |
350 | .irq_set_type = tegra_gpio_irq_set_type, | |
2e47b8b3 | 351 | #ifdef CONFIG_PM |
37337a8d | 352 | .irq_set_wake = tegra_gpio_wake_enable, |
2e47b8b3 | 353 | #endif |
3c92db9a EG |
354 | }; |
355 | ||
5c1e2c9d SW |
356 | struct tegra_gpio_soc_config { |
357 | u32 bank_stride; | |
358 | u32 upper_offset; | |
359 | }; | |
360 | ||
361 | static struct tegra_gpio_soc_config tegra20_gpio_config = { | |
362 | .bank_stride = 0x80, | |
363 | .upper_offset = 0x800, | |
364 | }; | |
365 | ||
366 | static struct tegra_gpio_soc_config tegra30_gpio_config = { | |
367 | .bank_stride = 0x100, | |
368 | .upper_offset = 0x80, | |
369 | }; | |
370 | ||
371 | static struct of_device_id tegra_gpio_of_match[] __devinitdata = { | |
372 | { .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config }, | |
373 | { .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config }, | |
374 | { }, | |
375 | }; | |
3c92db9a EG |
376 | |
377 | /* This lock class tells lockdep that GPIO irqs are in a different | |
378 | * category than their parents, so it won't report false recursion. | |
379 | */ | |
380 | static struct lock_class_key gpio_lock_class; | |
381 | ||
88d8951e | 382 | static int __devinit tegra_gpio_probe(struct platform_device *pdev) |
3c92db9a | 383 | { |
5c1e2c9d SW |
384 | const struct of_device_id *match; |
385 | struct tegra_gpio_soc_config *config; | |
3391811c | 386 | int irq_base; |
88d8951e | 387 | struct resource *res; |
3c92db9a | 388 | struct tegra_gpio_bank *bank; |
47008001 | 389 | int gpio; |
3c92db9a EG |
390 | int i; |
391 | int j; | |
392 | ||
5c1e2c9d SW |
393 | match = of_match_device(tegra_gpio_of_match, &pdev->dev); |
394 | if (match) | |
395 | config = (struct tegra_gpio_soc_config *)match->data; | |
396 | else | |
397 | config = &tegra20_gpio_config; | |
398 | ||
399 | tegra_gpio_bank_stride = config->bank_stride; | |
400 | tegra_gpio_upper_offset = config->upper_offset; | |
401 | ||
3391811c SW |
402 | for (;;) { |
403 | res = platform_get_resource(pdev, IORESOURCE_IRQ, tegra_gpio_bank_count); | |
404 | if (!res) | |
405 | break; | |
406 | tegra_gpio_bank_count++; | |
407 | } | |
408 | if (!tegra_gpio_bank_count) { | |
409 | dev_err(&pdev->dev, "Missing IRQ resource\n"); | |
410 | return -ENODEV; | |
411 | } | |
412 | ||
413 | tegra_gpio_chip.ngpio = tegra_gpio_bank_count * 32; | |
414 | ||
415 | tegra_gpio_banks = devm_kzalloc(&pdev->dev, | |
416 | tegra_gpio_bank_count * sizeof(*tegra_gpio_banks), | |
417 | GFP_KERNEL); | |
418 | if (!tegra_gpio_banks) { | |
419 | dev_err(&pdev->dev, "Couldn't allocate bank structure\n"); | |
420 | return -ENODEV; | |
421 | } | |
422 | ||
423 | irq_base = irq_alloc_descs(-1, 0, tegra_gpio_chip.ngpio, 0); | |
424 | if (irq_base < 0) { | |
6f74dc9b SW |
425 | dev_err(&pdev->dev, "Couldn't allocate IRQ numbers\n"); |
426 | return -ENODEV; | |
427 | } | |
bdc93a77 SW |
428 | irq_domain = irq_domain_add_legacy(pdev->dev.of_node, |
429 | tegra_gpio_chip.ngpio, irq_base, 0, | |
430 | &irq_domain_simple_ops, NULL); | |
6f74dc9b | 431 | |
3391811c | 432 | for (i = 0; i < tegra_gpio_bank_count; i++) { |
88d8951e SW |
433 | res = platform_get_resource(pdev, IORESOURCE_IRQ, i); |
434 | if (!res) { | |
435 | dev_err(&pdev->dev, "Missing IRQ resource\n"); | |
436 | return -ENODEV; | |
437 | } | |
438 | ||
439 | bank = &tegra_gpio_banks[i]; | |
440 | bank->bank = i; | |
441 | bank->irq = res->start; | |
442 | } | |
443 | ||
444 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
445 | if (!res) { | |
446 | dev_err(&pdev->dev, "Missing MEM resource\n"); | |
447 | return -ENODEV; | |
448 | } | |
449 | ||
aedd4fdf | 450 | regs = devm_request_and_ioremap(&pdev->dev, res); |
88d8951e SW |
451 | if (!regs) { |
452 | dev_err(&pdev->dev, "Couldn't ioremap regs\n"); | |
453 | return -ENODEV; | |
454 | } | |
455 | ||
4a3398ee | 456 | for (i = 0; i < tegra_gpio_bank_count; i++) { |
3c92db9a EG |
457 | for (j = 0; j < 4; j++) { |
458 | int gpio = tegra_gpio_compose(i, j, 0); | |
88d8951e | 459 | tegra_gpio_writel(0x00, GPIO_INT_ENB(gpio)); |
3c92db9a EG |
460 | } |
461 | } | |
462 | ||
df221227 | 463 | #ifdef CONFIG_OF_GPIO |
88d8951e SW |
464 | tegra_gpio_chip.of_node = pdev->dev.of_node; |
465 | #endif | |
df221227 | 466 | |
3c92db9a EG |
467 | gpiochip_add(&tegra_gpio_chip); |
468 | ||
3391811c | 469 | for (gpio = 0; gpio < tegra_gpio_chip.ngpio; gpio++) { |
bdc93a77 | 470 | int irq = irq_find_mapping(irq_domain, gpio); |
47008001 | 471 | /* No validity check; all Tegra GPIOs are valid IRQs */ |
3c92db9a | 472 | |
47008001 | 473 | bank = &tegra_gpio_banks[GPIO_BANK(gpio)]; |
3c92db9a | 474 | |
47008001 SW |
475 | irq_set_lockdep_class(irq, &gpio_lock_class); |
476 | irq_set_chip_data(irq, bank); | |
477 | irq_set_chip_and_handler(irq, &tegra_gpio_irq_chip, | |
f38c02f3 | 478 | handle_simple_irq); |
47008001 | 479 | set_irq_flags(irq, IRQF_VALID); |
3c92db9a EG |
480 | } |
481 | ||
3391811c | 482 | for (i = 0; i < tegra_gpio_bank_count; i++) { |
3c92db9a EG |
483 | bank = &tegra_gpio_banks[i]; |
484 | ||
6845664a TG |
485 | irq_set_chained_handler(bank->irq, tegra_gpio_irq_handler); |
486 | irq_set_handler_data(bank->irq, bank); | |
3c92db9a EG |
487 | |
488 | for (j = 0; j < 4; j++) | |
489 | spin_lock_init(&bank->lvl_lock[j]); | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
88d8951e SW |
495 | static struct platform_driver tegra_gpio_driver = { |
496 | .driver = { | |
497 | .name = "tegra-gpio", | |
498 | .owner = THIS_MODULE, | |
499 | .of_match_table = tegra_gpio_of_match, | |
500 | }, | |
501 | .probe = tegra_gpio_probe, | |
502 | }; | |
503 | ||
504 | static int __init tegra_gpio_init(void) | |
505 | { | |
506 | return platform_driver_register(&tegra_gpio_driver); | |
507 | } | |
3c92db9a EG |
508 | postcore_initcall(tegra_gpio_init); |
509 | ||
510 | #ifdef CONFIG_DEBUG_FS | |
511 | ||
512 | #include <linux/debugfs.h> | |
513 | #include <linux/seq_file.h> | |
514 | ||
515 | static int dbg_gpio_show(struct seq_file *s, void *unused) | |
516 | { | |
517 | int i; | |
518 | int j; | |
519 | ||
4a3398ee | 520 | for (i = 0; i < tegra_gpio_bank_count; i++) { |
3c92db9a EG |
521 | for (j = 0; j < 4; j++) { |
522 | int gpio = tegra_gpio_compose(i, j, 0); | |
2e47b8b3 CC |
523 | seq_printf(s, |
524 | "%d:%d %02x %02x %02x %02x %02x %02x %06x\n", | |
525 | i, j, | |
88d8951e SW |
526 | tegra_gpio_readl(GPIO_CNF(gpio)), |
527 | tegra_gpio_readl(GPIO_OE(gpio)), | |
528 | tegra_gpio_readl(GPIO_OUT(gpio)), | |
529 | tegra_gpio_readl(GPIO_IN(gpio)), | |
530 | tegra_gpio_readl(GPIO_INT_STA(gpio)), | |
531 | tegra_gpio_readl(GPIO_INT_ENB(gpio)), | |
532 | tegra_gpio_readl(GPIO_INT_LVL(gpio))); | |
3c92db9a EG |
533 | } |
534 | } | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static int dbg_gpio_open(struct inode *inode, struct file *file) | |
539 | { | |
540 | return single_open(file, dbg_gpio_show, &inode->i_private); | |
541 | } | |
542 | ||
543 | static const struct file_operations debug_fops = { | |
544 | .open = dbg_gpio_open, | |
545 | .read = seq_read, | |
546 | .llseek = seq_lseek, | |
547 | .release = single_release, | |
548 | }; | |
549 | ||
550 | static int __init tegra_gpio_debuginit(void) | |
551 | { | |
552 | (void) debugfs_create_file("tegra_gpio", S_IRUGO, | |
553 | NULL, NULL, &debug_fops); | |
554 | return 0; | |
555 | } | |
556 | late_initcall(tegra_gpio_debuginit); | |
557 | #endif |