Commit | Line | Data |
---|---|---|
1c44f5f1 | 1 | /* |
38f539a6 | 2 | * linux/arch/arm/plat-pxa/gpio.c |
1c44f5f1 PZ |
3 | * |
4 | * Generic PXA GPIO handling | |
5 | * | |
6 | * Author: Nicolas Pitre | |
7 | * Created: Jun 15, 2001 | |
8 | * Copyright: MontaVista Software Inc. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
389eda15 HZ |
14 | #include <linux/clk.h> |
15 | #include <linux/err.h> | |
2f8163ba | 16 | #include <linux/gpio.h> |
157d2644 | 17 | #include <linux/gpio-pxa.h> |
1c44f5f1 | 18 | #include <linux/init.h> |
e3630db1 | 19 | #include <linux/irq.h> |
fced80c7 | 20 | #include <linux/io.h> |
157d2644 | 21 | #include <linux/platform_device.h> |
2eaa03b5 | 22 | #include <linux/syscore_ops.h> |
4aa78264 | 23 | #include <linux/slab.h> |
1c44f5f1 | 24 | |
feefe73f RH |
25 | #include <mach/irqs.h> |
26 | ||
157d2644 HZ |
27 | /* |
28 | * We handle the GPIOs by banks, each bank covers up to 32 GPIOs with | |
29 | * one set of registers. The register offsets are organized below: | |
30 | * | |
31 | * GPLR GPDR GPSR GPCR GRER GFER GEDR | |
32 | * BANK 0 - 0x0000 0x000C 0x0018 0x0024 0x0030 0x003C 0x0048 | |
33 | * BANK 1 - 0x0004 0x0010 0x001C 0x0028 0x0034 0x0040 0x004C | |
34 | * BANK 2 - 0x0008 0x0014 0x0020 0x002C 0x0038 0x0044 0x0050 | |
35 | * | |
36 | * BANK 3 - 0x0100 0x010C 0x0118 0x0124 0x0130 0x013C 0x0148 | |
37 | * BANK 4 - 0x0104 0x0110 0x011C 0x0128 0x0134 0x0140 0x014C | |
38 | * BANK 5 - 0x0108 0x0114 0x0120 0x012C 0x0138 0x0144 0x0150 | |
39 | * | |
40 | * NOTE: | |
41 | * BANK 3 is only available on PXA27x and later processors. | |
42 | * BANK 4 and 5 are only available on PXA935 | |
43 | */ | |
44 | ||
45 | #define GPLR_OFFSET 0x00 | |
46 | #define GPDR_OFFSET 0x0C | |
47 | #define GPSR_OFFSET 0x18 | |
48 | #define GPCR_OFFSET 0x24 | |
49 | #define GRER_OFFSET 0x30 | |
50 | #define GFER_OFFSET 0x3C | |
51 | #define GEDR_OFFSET 0x48 | |
52 | #define GAFR_OFFSET 0x54 | |
be24168f | 53 | #define ED_MASK_OFFSET 0x9C /* GPIO edge detection for AP side */ |
157d2644 HZ |
54 | |
55 | #define BANK_OFF(n) (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2)) | |
1c44f5f1 | 56 | |
3b8e285c EM |
57 | int pxa_last_gpio; |
58 | ||
1c44f5f1 PZ |
59 | struct pxa_gpio_chip { |
60 | struct gpio_chip chip; | |
0807da59 EM |
61 | void __iomem *regbase; |
62 | char label[10]; | |
63 | ||
64 | unsigned long irq_mask; | |
65 | unsigned long irq_edge_rise; | |
66 | unsigned long irq_edge_fall; | |
67 | ||
68 | #ifdef CONFIG_PM | |
69 | unsigned long saved_gplr; | |
70 | unsigned long saved_gpdr; | |
71 | unsigned long saved_grer; | |
72 | unsigned long saved_gfer; | |
73 | #endif | |
1c44f5f1 PZ |
74 | }; |
75 | ||
4929f5a8 HZ |
76 | enum { |
77 | PXA25X_GPIO = 0, | |
78 | PXA26X_GPIO, | |
79 | PXA27X_GPIO, | |
80 | PXA3XX_GPIO, | |
81 | PXA93X_GPIO, | |
82 | MMP_GPIO = 0x10, | |
83 | MMP2_GPIO, | |
84 | }; | |
85 | ||
0807da59 EM |
86 | static DEFINE_SPINLOCK(gpio_lock); |
87 | static struct pxa_gpio_chip *pxa_gpio_chips; | |
4929f5a8 | 88 | static int gpio_type; |
157d2644 | 89 | static void __iomem *gpio_reg_base; |
0807da59 EM |
90 | |
91 | #define for_each_gpio_chip(i, c) \ | |
92 | for (i = 0, c = &pxa_gpio_chips[0]; i <= pxa_last_gpio; i += 32, c++) | |
93 | ||
94 | static inline void __iomem *gpio_chip_base(struct gpio_chip *c) | |
95 | { | |
96 | return container_of(c, struct pxa_gpio_chip, chip)->regbase; | |
97 | } | |
98 | ||
a065685d | 99 | static inline struct pxa_gpio_chip *gpio_to_pxachip(unsigned gpio) |
0807da59 EM |
100 | { |
101 | return &pxa_gpio_chips[gpio_to_bank(gpio)]; | |
102 | } | |
103 | ||
4929f5a8 HZ |
104 | static inline int gpio_is_pxa_type(int type) |
105 | { | |
106 | return (type & MMP_GPIO) == 0; | |
107 | } | |
108 | ||
109 | static inline int gpio_is_mmp_type(int type) | |
110 | { | |
111 | return (type & MMP_GPIO) != 0; | |
112 | } | |
113 | ||
157d2644 HZ |
114 | /* GPIO86/87/88/89 on PXA26x have their direction bits in PXA_GPDR(2 inverted, |
115 | * as well as their Alternate Function value being '1' for GPIO in GAFRx. | |
116 | */ | |
117 | static inline int __gpio_is_inverted(int gpio) | |
118 | { | |
119 | if ((gpio_type == PXA26X_GPIO) && (gpio > 85)) | |
120 | return 1; | |
121 | return 0; | |
122 | } | |
123 | ||
124 | /* | |
125 | * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate | |
126 | * function of a GPIO, and GPDRx cannot be altered once configured. It | |
127 | * is attributed as "occupied" here (I know this terminology isn't | |
128 | * accurate, you are welcome to propose a better one :-) | |
129 | */ | |
130 | static inline int __gpio_is_occupied(unsigned gpio) | |
131 | { | |
132 | struct pxa_gpio_chip *pxachip; | |
133 | void __iomem *base; | |
134 | unsigned long gafr = 0, gpdr = 0; | |
135 | int ret, af = 0, dir = 0; | |
136 | ||
137 | pxachip = gpio_to_pxachip(gpio); | |
138 | base = gpio_chip_base(&pxachip->chip); | |
139 | gpdr = readl_relaxed(base + GPDR_OFFSET); | |
140 | ||
141 | switch (gpio_type) { | |
142 | case PXA25X_GPIO: | |
143 | case PXA26X_GPIO: | |
144 | case PXA27X_GPIO: | |
145 | gafr = readl_relaxed(base + GAFR_OFFSET); | |
146 | af = (gafr >> ((gpio & 0xf) * 2)) & 0x3; | |
147 | dir = gpdr & GPIO_bit(gpio); | |
148 | ||
149 | if (__gpio_is_inverted(gpio)) | |
150 | ret = (af != 1) || (dir == 0); | |
151 | else | |
152 | ret = (af != 0) || (dir != 0); | |
153 | break; | |
154 | default: | |
155 | ret = gpdr & GPIO_bit(gpio); | |
156 | break; | |
157 | } | |
158 | return ret; | |
159 | } | |
160 | ||
4929f5a8 HZ |
161 | #ifdef CONFIG_ARCH_PXA |
162 | static inline int __pxa_gpio_to_irq(int gpio) | |
163 | { | |
164 | if (gpio_is_pxa_type(gpio_type)) | |
165 | return PXA_GPIO_TO_IRQ(gpio); | |
166 | return -1; | |
167 | } | |
168 | ||
169 | static inline int __pxa_irq_to_gpio(int irq) | |
170 | { | |
171 | if (gpio_is_pxa_type(gpio_type)) | |
172 | return irq - PXA_GPIO_TO_IRQ(0); | |
173 | return -1; | |
174 | } | |
175 | #else | |
176 | static inline int __pxa_gpio_to_irq(int gpio) { return -1; } | |
177 | static inline int __pxa_irq_to_gpio(int irq) { return -1; } | |
178 | #endif | |
179 | ||
180 | #ifdef CONFIG_ARCH_MMP | |
181 | static inline int __mmp_gpio_to_irq(int gpio) | |
182 | { | |
183 | if (gpio_is_mmp_type(gpio_type)) | |
184 | return MMP_GPIO_TO_IRQ(gpio); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | static inline int __mmp_irq_to_gpio(int irq) | |
189 | { | |
190 | if (gpio_is_mmp_type(gpio_type)) | |
191 | return irq - MMP_GPIO_TO_IRQ(0); | |
192 | return -1; | |
193 | } | |
194 | #else | |
195 | static inline int __mmp_gpio_to_irq(int gpio) { return -1; } | |
196 | static inline int __mmp_irq_to_gpio(int irq) { return -1; } | |
197 | #endif | |
198 | ||
199 | static int pxa_gpio_to_irq(struct gpio_chip *chip, unsigned offset) | |
200 | { | |
201 | int gpio, ret; | |
202 | ||
203 | gpio = chip->base + offset; | |
204 | ret = __pxa_gpio_to_irq(gpio); | |
205 | if (ret >= 0) | |
206 | return ret; | |
207 | return __mmp_gpio_to_irq(gpio); | |
208 | } | |
209 | ||
210 | int pxa_irq_to_gpio(int irq) | |
211 | { | |
212 | int ret; | |
213 | ||
214 | ret = __pxa_irq_to_gpio(irq); | |
215 | if (ret >= 0) | |
216 | return ret; | |
217 | return __mmp_irq_to_gpio(irq); | |
218 | } | |
219 | ||
1c44f5f1 PZ |
220 | static int pxa_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
221 | { | |
0807da59 EM |
222 | void __iomem *base = gpio_chip_base(chip); |
223 | uint32_t value, mask = 1 << offset; | |
224 | unsigned long flags; | |
225 | ||
226 | spin_lock_irqsave(&gpio_lock, flags); | |
227 | ||
df664d20 | 228 | value = readl_relaxed(base + GPDR_OFFSET); |
067455aa EM |
229 | if (__gpio_is_inverted(chip->base + offset)) |
230 | value |= mask; | |
231 | else | |
232 | value &= ~mask; | |
df664d20 | 233 | writel_relaxed(value, base + GPDR_OFFSET); |
1c44f5f1 | 234 | |
0807da59 | 235 | spin_unlock_irqrestore(&gpio_lock, flags); |
1c44f5f1 PZ |
236 | return 0; |
237 | } | |
238 | ||
239 | static int pxa_gpio_direction_output(struct gpio_chip *chip, | |
0807da59 | 240 | unsigned offset, int value) |
1c44f5f1 | 241 | { |
0807da59 EM |
242 | void __iomem *base = gpio_chip_base(chip); |
243 | uint32_t tmp, mask = 1 << offset; | |
244 | unsigned long flags; | |
245 | ||
df664d20 | 246 | writel_relaxed(mask, base + (value ? GPSR_OFFSET : GPCR_OFFSET)); |
0807da59 EM |
247 | |
248 | spin_lock_irqsave(&gpio_lock, flags); | |
249 | ||
df664d20 | 250 | tmp = readl_relaxed(base + GPDR_OFFSET); |
067455aa EM |
251 | if (__gpio_is_inverted(chip->base + offset)) |
252 | tmp &= ~mask; | |
253 | else | |
254 | tmp |= mask; | |
df664d20 | 255 | writel_relaxed(tmp, base + GPDR_OFFSET); |
1c44f5f1 | 256 | |
0807da59 | 257 | spin_unlock_irqrestore(&gpio_lock, flags); |
1c44f5f1 PZ |
258 | return 0; |
259 | } | |
260 | ||
1c44f5f1 PZ |
261 | static int pxa_gpio_get(struct gpio_chip *chip, unsigned offset) |
262 | { | |
df664d20 | 263 | return readl_relaxed(gpio_chip_base(chip) + GPLR_OFFSET) & (1 << offset); |
1c44f5f1 PZ |
264 | } |
265 | ||
1c44f5f1 PZ |
266 | static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
267 | { | |
df664d20 | 268 | writel_relaxed(1 << offset, gpio_chip_base(chip) + |
0807da59 | 269 | (value ? GPSR_OFFSET : GPCR_OFFSET)); |
1c44f5f1 PZ |
270 | } |
271 | ||
157d2644 | 272 | static int __devinit pxa_init_gpio_chip(int gpio_end) |
a58fbcd8 | 273 | { |
0807da59 EM |
274 | int i, gpio, nbanks = gpio_to_bank(gpio_end) + 1; |
275 | struct pxa_gpio_chip *chips; | |
a58fbcd8 | 276 | |
4aa78264 | 277 | chips = kzalloc(nbanks * sizeof(struct pxa_gpio_chip), GFP_KERNEL); |
0807da59 EM |
278 | if (chips == NULL) { |
279 | pr_err("%s: failed to allocate GPIO chips\n", __func__); | |
280 | return -ENOMEM; | |
a58fbcd8 | 281 | } |
a58fbcd8 | 282 | |
0807da59 EM |
283 | for (i = 0, gpio = 0; i < nbanks; i++, gpio += 32) { |
284 | struct gpio_chip *c = &chips[i].chip; | |
e3630db1 | 285 | |
0807da59 | 286 | sprintf(chips[i].label, "gpio-%d", i); |
157d2644 | 287 | chips[i].regbase = gpio_reg_base + BANK_OFF(i); |
0807da59 EM |
288 | |
289 | c->base = gpio; | |
290 | c->label = chips[i].label; | |
291 | ||
292 | c->direction_input = pxa_gpio_direction_input; | |
293 | c->direction_output = pxa_gpio_direction_output; | |
294 | c->get = pxa_gpio_get; | |
295 | c->set = pxa_gpio_set; | |
4929f5a8 | 296 | c->to_irq = pxa_gpio_to_irq; |
0807da59 EM |
297 | |
298 | /* number of GPIOs on last bank may be less than 32 */ | |
299 | c->ngpio = (gpio + 31 > gpio_end) ? (gpio_end - gpio + 1) : 32; | |
300 | gpiochip_add(c); | |
301 | } | |
302 | pxa_gpio_chips = chips; | |
303 | return 0; | |
304 | } | |
e3630db1 | 305 | |
a8f6faeb EM |
306 | /* Update only those GRERx and GFERx edge detection register bits if those |
307 | * bits are set in c->irq_mask | |
308 | */ | |
309 | static inline void update_edge_detect(struct pxa_gpio_chip *c) | |
310 | { | |
311 | uint32_t grer, gfer; | |
312 | ||
df664d20 HZ |
313 | grer = readl_relaxed(c->regbase + GRER_OFFSET) & ~c->irq_mask; |
314 | gfer = readl_relaxed(c->regbase + GFER_OFFSET) & ~c->irq_mask; | |
a8f6faeb EM |
315 | grer |= c->irq_edge_rise & c->irq_mask; |
316 | gfer |= c->irq_edge_fall & c->irq_mask; | |
df664d20 HZ |
317 | writel_relaxed(grer, c->regbase + GRER_OFFSET); |
318 | writel_relaxed(gfer, c->regbase + GFER_OFFSET); | |
a8f6faeb EM |
319 | } |
320 | ||
a3f4c927 | 321 | static int pxa_gpio_irq_type(struct irq_data *d, unsigned int type) |
e3630db1 | 322 | { |
0807da59 | 323 | struct pxa_gpio_chip *c; |
4929f5a8 | 324 | int gpio = pxa_irq_to_gpio(d->irq); |
0807da59 | 325 | unsigned long gpdr, mask = GPIO_bit(gpio); |
e3630db1 | 326 | |
a065685d | 327 | c = gpio_to_pxachip(gpio); |
e3630db1 | 328 | |
329 | if (type == IRQ_TYPE_PROBE) { | |
330 | /* Don't mess with enabled GPIOs using preconfigured edges or | |
331 | * GPIOs set to alternate function or to output during probe | |
332 | */ | |
0807da59 | 333 | if ((c->irq_edge_rise | c->irq_edge_fall) & GPIO_bit(gpio)) |
e3630db1 | 334 | return 0; |
689c04a3 | 335 | |
336 | if (__gpio_is_occupied(gpio)) | |
e3630db1 | 337 | return 0; |
689c04a3 | 338 | |
e3630db1 | 339 | type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; |
340 | } | |
341 | ||
df664d20 | 342 | gpdr = readl_relaxed(c->regbase + GPDR_OFFSET); |
0807da59 | 343 | |
067455aa | 344 | if (__gpio_is_inverted(gpio)) |
df664d20 | 345 | writel_relaxed(gpdr | mask, c->regbase + GPDR_OFFSET); |
067455aa | 346 | else |
df664d20 | 347 | writel_relaxed(gpdr & ~mask, c->regbase + GPDR_OFFSET); |
e3630db1 | 348 | |
349 | if (type & IRQ_TYPE_EDGE_RISING) | |
0807da59 | 350 | c->irq_edge_rise |= mask; |
e3630db1 | 351 | else |
0807da59 | 352 | c->irq_edge_rise &= ~mask; |
e3630db1 | 353 | |
354 | if (type & IRQ_TYPE_EDGE_FALLING) | |
0807da59 | 355 | c->irq_edge_fall |= mask; |
e3630db1 | 356 | else |
0807da59 | 357 | c->irq_edge_fall &= ~mask; |
e3630db1 | 358 | |
a8f6faeb | 359 | update_edge_detect(c); |
e3630db1 | 360 | |
a3f4c927 | 361 | pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, d->irq, gpio, |
e3630db1 | 362 | ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""), |
363 | ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : "")); | |
364 | return 0; | |
365 | } | |
366 | ||
e3630db1 | 367 | static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc) |
368 | { | |
0807da59 EM |
369 | struct pxa_gpio_chip *c; |
370 | int loop, gpio, gpio_base, n; | |
371 | unsigned long gedr; | |
e3630db1 | 372 | |
373 | do { | |
e3630db1 | 374 | loop = 0; |
0807da59 EM |
375 | for_each_gpio_chip(gpio, c) { |
376 | gpio_base = c->chip.base; | |
377 | ||
df664d20 | 378 | gedr = readl_relaxed(c->regbase + GEDR_OFFSET); |
0807da59 | 379 | gedr = gedr & c->irq_mask; |
df664d20 | 380 | writel_relaxed(gedr, c->regbase + GEDR_OFFSET); |
e3630db1 | 381 | |
0807da59 EM |
382 | n = find_first_bit(&gedr, BITS_PER_LONG); |
383 | while (n < BITS_PER_LONG) { | |
384 | loop = 1; | |
e3630db1 | 385 | |
0807da59 EM |
386 | generic_handle_irq(gpio_to_irq(gpio_base + n)); |
387 | n = find_next_bit(&gedr, BITS_PER_LONG, n + 1); | |
388 | } | |
e3630db1 | 389 | } |
390 | } while (loop); | |
391 | } | |
392 | ||
a3f4c927 | 393 | static void pxa_ack_muxed_gpio(struct irq_data *d) |
e3630db1 | 394 | { |
4929f5a8 | 395 | int gpio = pxa_irq_to_gpio(d->irq); |
a065685d | 396 | struct pxa_gpio_chip *c = gpio_to_pxachip(gpio); |
0807da59 | 397 | |
df664d20 | 398 | writel_relaxed(GPIO_bit(gpio), c->regbase + GEDR_OFFSET); |
e3630db1 | 399 | } |
400 | ||
a3f4c927 | 401 | static void pxa_mask_muxed_gpio(struct irq_data *d) |
e3630db1 | 402 | { |
4929f5a8 | 403 | int gpio = pxa_irq_to_gpio(d->irq); |
a065685d | 404 | struct pxa_gpio_chip *c = gpio_to_pxachip(gpio); |
0807da59 EM |
405 | uint32_t grer, gfer; |
406 | ||
407 | c->irq_mask &= ~GPIO_bit(gpio); | |
408 | ||
df664d20 HZ |
409 | grer = readl_relaxed(c->regbase + GRER_OFFSET) & ~GPIO_bit(gpio); |
410 | gfer = readl_relaxed(c->regbase + GFER_OFFSET) & ~GPIO_bit(gpio); | |
411 | writel_relaxed(grer, c->regbase + GRER_OFFSET); | |
412 | writel_relaxed(gfer, c->regbase + GFER_OFFSET); | |
e3630db1 | 413 | } |
414 | ||
a3f4c927 | 415 | static void pxa_unmask_muxed_gpio(struct irq_data *d) |
e3630db1 | 416 | { |
4929f5a8 | 417 | int gpio = pxa_irq_to_gpio(d->irq); |
a065685d | 418 | struct pxa_gpio_chip *c = gpio_to_pxachip(gpio); |
0807da59 EM |
419 | |
420 | c->irq_mask |= GPIO_bit(gpio); | |
a8f6faeb | 421 | update_edge_detect(c); |
e3630db1 | 422 | } |
423 | ||
424 | static struct irq_chip pxa_muxed_gpio_chip = { | |
425 | .name = "GPIO", | |
a3f4c927 LB |
426 | .irq_ack = pxa_ack_muxed_gpio, |
427 | .irq_mask = pxa_mask_muxed_gpio, | |
428 | .irq_unmask = pxa_unmask_muxed_gpio, | |
429 | .irq_set_type = pxa_gpio_irq_type, | |
e3630db1 | 430 | }; |
431 | ||
478e223c HZ |
432 | static int pxa_gpio_nums(void) |
433 | { | |
434 | int count = 0; | |
435 | ||
436 | #ifdef CONFIG_ARCH_PXA | |
437 | if (cpu_is_pxa25x()) { | |
438 | #ifdef CONFIG_CPU_PXA26x | |
439 | count = 89; | |
440 | gpio_type = PXA26X_GPIO; | |
441 | #elif defined(CONFIG_PXA25x) | |
442 | count = 84; | |
443 | gpio_type = PXA26X_GPIO; | |
444 | #endif /* CONFIG_CPU_PXA26x */ | |
445 | } else if (cpu_is_pxa27x()) { | |
446 | count = 120; | |
447 | gpio_type = PXA27X_GPIO; | |
448 | } else if (cpu_is_pxa93x() || cpu_is_pxa95x()) { | |
449 | count = 191; | |
450 | gpio_type = PXA93X_GPIO; | |
451 | } else if (cpu_is_pxa3xx()) { | |
452 | count = 127; | |
453 | gpio_type = PXA3XX_GPIO; | |
454 | } | |
455 | #endif /* CONFIG_ARCH_PXA */ | |
456 | ||
457 | #ifdef CONFIG_ARCH_MMP | |
458 | if (cpu_is_pxa168() || cpu_is_pxa910()) { | |
459 | count = 127; | |
460 | gpio_type = MMP_GPIO; | |
461 | } else if (cpu_is_mmp2()) { | |
462 | count = 191; | |
463 | gpio_type = MMP2_GPIO; | |
464 | } | |
465 | #endif /* CONFIG_ARCH_MMP */ | |
466 | return count; | |
467 | } | |
468 | ||
157d2644 | 469 | static int __devinit pxa_gpio_probe(struct platform_device *pdev) |
e3630db1 | 470 | { |
0807da59 | 471 | struct pxa_gpio_chip *c; |
157d2644 | 472 | struct resource *res; |
389eda15 HZ |
473 | struct clk *clk; |
474 | int gpio, irq, ret; | |
157d2644 | 475 | int irq0 = 0, irq1 = 0, irq_mux, gpio_offset = 0; |
e3630db1 | 476 | |
478e223c HZ |
477 | pxa_last_gpio = pxa_gpio_nums(); |
478 | if (!pxa_last_gpio) | |
157d2644 HZ |
479 | return -EINVAL; |
480 | ||
481 | irq0 = platform_get_irq_byname(pdev, "gpio0"); | |
482 | irq1 = platform_get_irq_byname(pdev, "gpio1"); | |
483 | irq_mux = platform_get_irq_byname(pdev, "gpio_mux"); | |
484 | if ((irq0 > 0 && irq1 <= 0) || (irq0 <= 0 && irq1 > 0) | |
485 | || (irq_mux <= 0)) | |
486 | return -EINVAL; | |
487 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
488 | if (!res) | |
489 | return -EINVAL; | |
490 | gpio_reg_base = ioremap(res->start, resource_size(res)); | |
491 | if (!gpio_reg_base) | |
492 | return -EINVAL; | |
493 | ||
494 | if (irq0 > 0) | |
495 | gpio_offset = 2; | |
e3630db1 | 496 | |
389eda15 HZ |
497 | clk = clk_get(&pdev->dev, NULL); |
498 | if (IS_ERR(clk)) { | |
499 | dev_err(&pdev->dev, "Error %ld to get gpio clock\n", | |
500 | PTR_ERR(clk)); | |
501 | iounmap(gpio_reg_base); | |
502 | return PTR_ERR(clk); | |
503 | } | |
504 | ret = clk_prepare(clk); | |
505 | if (ret) { | |
506 | clk_put(clk); | |
507 | iounmap(gpio_reg_base); | |
508 | return ret; | |
509 | } | |
510 | ret = clk_enable(clk); | |
511 | if (ret) { | |
512 | clk_unprepare(clk); | |
513 | clk_put(clk); | |
514 | iounmap(gpio_reg_base); | |
515 | return ret; | |
516 | } | |
517 | ||
0807da59 | 518 | /* Initialize GPIO chips */ |
157d2644 | 519 | pxa_init_gpio_chip(pxa_last_gpio); |
0807da59 | 520 | |
e3630db1 | 521 | /* clear all GPIO edge detects */ |
0807da59 | 522 | for_each_gpio_chip(gpio, c) { |
df664d20 HZ |
523 | writel_relaxed(0, c->regbase + GFER_OFFSET); |
524 | writel_relaxed(0, c->regbase + GRER_OFFSET); | |
525 | writel_relaxed(~0,c->regbase + GEDR_OFFSET); | |
be24168f HZ |
526 | /* unmask GPIO edge detect for AP side */ |
527 | if (gpio_is_mmp_type(gpio_type)) | |
528 | writel_relaxed(~0, c->regbase + ED_MASK_OFFSET); | |
e3630db1 | 529 | } |
530 | ||
87c49e20 HZ |
531 | #ifdef CONFIG_ARCH_PXA |
532 | irq = gpio_to_irq(0); | |
533 | irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip, | |
534 | handle_edge_irq); | |
535 | set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); | |
536 | irq_set_chained_handler(IRQ_GPIO0, pxa_gpio_demux_handler); | |
537 | ||
538 | irq = gpio_to_irq(1); | |
539 | irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip, | |
540 | handle_edge_irq); | |
541 | set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); | |
542 | irq_set_chained_handler(IRQ_GPIO1, pxa_gpio_demux_handler); | |
543 | #endif | |
544 | ||
157d2644 HZ |
545 | for (irq = gpio_to_irq(gpio_offset); |
546 | irq <= gpio_to_irq(pxa_last_gpio); irq++) { | |
f38c02f3 TG |
547 | irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip, |
548 | handle_edge_irq); | |
e3630db1 | 549 | set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); |
550 | } | |
551 | ||
157d2644 HZ |
552 | irq_set_chained_handler(irq_mux, pxa_gpio_demux_handler); |
553 | return 0; | |
554 | } | |
555 | ||
556 | static struct platform_driver pxa_gpio_driver = { | |
557 | .probe = pxa_gpio_probe, | |
558 | .driver = { | |
559 | .name = "pxa-gpio", | |
560 | }, | |
561 | }; | |
562 | ||
563 | static int __init pxa_gpio_init(void) | |
564 | { | |
565 | return platform_driver_register(&pxa_gpio_driver); | |
e3630db1 | 566 | } |
157d2644 | 567 | postcore_initcall(pxa_gpio_init); |
663707c1 | 568 | |
569 | #ifdef CONFIG_PM | |
2eaa03b5 | 570 | static int pxa_gpio_suspend(void) |
663707c1 | 571 | { |
0807da59 EM |
572 | struct pxa_gpio_chip *c; |
573 | int gpio; | |
663707c1 | 574 | |
0807da59 | 575 | for_each_gpio_chip(gpio, c) { |
df664d20 HZ |
576 | c->saved_gplr = readl_relaxed(c->regbase + GPLR_OFFSET); |
577 | c->saved_gpdr = readl_relaxed(c->regbase + GPDR_OFFSET); | |
578 | c->saved_grer = readl_relaxed(c->regbase + GRER_OFFSET); | |
579 | c->saved_gfer = readl_relaxed(c->regbase + GFER_OFFSET); | |
663707c1 | 580 | |
581 | /* Clear GPIO transition detect bits */ | |
df664d20 | 582 | writel_relaxed(0xffffffff, c->regbase + GEDR_OFFSET); |
663707c1 | 583 | } |
584 | return 0; | |
585 | } | |
586 | ||
2eaa03b5 | 587 | static void pxa_gpio_resume(void) |
663707c1 | 588 | { |
0807da59 EM |
589 | struct pxa_gpio_chip *c; |
590 | int gpio; | |
663707c1 | 591 | |
0807da59 | 592 | for_each_gpio_chip(gpio, c) { |
663707c1 | 593 | /* restore level with set/clear */ |
df664d20 HZ |
594 | writel_relaxed( c->saved_gplr, c->regbase + GPSR_OFFSET); |
595 | writel_relaxed(~c->saved_gplr, c->regbase + GPCR_OFFSET); | |
663707c1 | 596 | |
df664d20 HZ |
597 | writel_relaxed(c->saved_grer, c->regbase + GRER_OFFSET); |
598 | writel_relaxed(c->saved_gfer, c->regbase + GFER_OFFSET); | |
599 | writel_relaxed(c->saved_gpdr, c->regbase + GPDR_OFFSET); | |
663707c1 | 600 | } |
663707c1 | 601 | } |
602 | #else | |
603 | #define pxa_gpio_suspend NULL | |
604 | #define pxa_gpio_resume NULL | |
605 | #endif | |
606 | ||
2eaa03b5 | 607 | struct syscore_ops pxa_gpio_syscore_ops = { |
663707c1 | 608 | .suspend = pxa_gpio_suspend, |
609 | .resume = pxa_gpio_resume, | |
610 | }; | |
157d2644 HZ |
611 | |
612 | static int __init pxa_gpio_sysinit(void) | |
613 | { | |
614 | register_syscore_ops(&pxa_gpio_syscore_ops); | |
615 | return 0; | |
616 | } | |
617 | postcore_initcall(pxa_gpio_sysinit); |