projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ARM: OMAP: Use gpiolib
[deliverable/linux.git] / arch / arm / plat-omap / gpio.c
1 /*
2 * linux/arch/arm/plat-omap/gpio.c
3 *
4 * Support functions for OMAP GPIO
5 *
6 * Copyright (C) 2003-2005 Nokia Corporation
7 * Written by Juha Yrjölä <juha.yrjola@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/interrupt.h>
17 #include <linux/sysdev.h>
18 #include <linux/err.h>
19 #include <linux/clk.h>
20
21 #include <asm/hardware.h>
22 #include <asm/irq.h>
23 #include <asm/arch/irqs.h>
24 #include <asm/arch/gpio.h>
25 #include <asm/mach/irq.h>
26
27 #include <asm/io.h>
28
29 /*
30 * OMAP1510 GPIO registers
31 */
32 #define OMAP1510_GPIO_BASE (void __iomem *)0xfffce000
33 #define OMAP1510_GPIO_DATA_INPUT 0x00
34 #define OMAP1510_GPIO_DATA_OUTPUT 0x04
35 #define OMAP1510_GPIO_DIR_CONTROL 0x08
36 #define OMAP1510_GPIO_INT_CONTROL 0x0c
37 #define OMAP1510_GPIO_INT_MASK 0x10
38 #define OMAP1510_GPIO_INT_STATUS 0x14
39 #define OMAP1510_GPIO_PIN_CONTROL 0x18
40
41 #define OMAP1510_IH_GPIO_BASE 64
42
43 /*
44 * OMAP1610 specific GPIO registers
45 */
46 #define OMAP1610_GPIO1_BASE (void __iomem *)0xfffbe400
47 #define OMAP1610_GPIO2_BASE (void __iomem *)0xfffbec00
48 #define OMAP1610_GPIO3_BASE (void __iomem *)0xfffbb400
49 #define OMAP1610_GPIO4_BASE (void __iomem *)0xfffbbc00
50 #define OMAP1610_GPIO_REVISION 0x0000
51 #define OMAP1610_GPIO_SYSCONFIG 0x0010
52 #define OMAP1610_GPIO_SYSSTATUS 0x0014
53 #define OMAP1610_GPIO_IRQSTATUS1 0x0018
54 #define OMAP1610_GPIO_IRQENABLE1 0x001c
55 #define OMAP1610_GPIO_WAKEUPENABLE 0x0028
56 #define OMAP1610_GPIO_DATAIN 0x002c
57 #define OMAP1610_GPIO_DATAOUT 0x0030
58 #define OMAP1610_GPIO_DIRECTION 0x0034
59 #define OMAP1610_GPIO_EDGE_CTRL1 0x0038
60 #define OMAP1610_GPIO_EDGE_CTRL2 0x003c
61 #define OMAP1610_GPIO_CLEAR_IRQENABLE1 0x009c
62 #define OMAP1610_GPIO_CLEAR_WAKEUPENA 0x00a8
63 #define OMAP1610_GPIO_CLEAR_DATAOUT 0x00b0
64 #define OMAP1610_GPIO_SET_IRQENABLE1 0x00dc
65 #define OMAP1610_GPIO_SET_WAKEUPENA 0x00e8
66 #define OMAP1610_GPIO_SET_DATAOUT 0x00f0
67
68 /*
69 * OMAP730 specific GPIO registers
70 */
71 #define OMAP730_GPIO1_BASE (void __iomem *)0xfffbc000
72 #define OMAP730_GPIO2_BASE (void __iomem *)0xfffbc800
73 #define OMAP730_GPIO3_BASE (void __iomem *)0xfffbd000
74 #define OMAP730_GPIO4_BASE (void __iomem *)0xfffbd800
75 #define OMAP730_GPIO5_BASE (void __iomem *)0xfffbe000
76 #define OMAP730_GPIO6_BASE (void __iomem *)0xfffbe800
77 #define OMAP730_GPIO_DATA_INPUT 0x00
78 #define OMAP730_GPIO_DATA_OUTPUT 0x04
79 #define OMAP730_GPIO_DIR_CONTROL 0x08
80 #define OMAP730_GPIO_INT_CONTROL 0x0c
81 #define OMAP730_GPIO_INT_MASK 0x10
82 #define OMAP730_GPIO_INT_STATUS 0x14
83
84 /*
85 * omap24xx specific GPIO registers
86 */
87 #define OMAP242X_GPIO1_BASE (void __iomem *)0x48018000
88 #define OMAP242X_GPIO2_BASE (void __iomem *)0x4801a000
89 #define OMAP242X_GPIO3_BASE (void __iomem *)0x4801c000
90 #define OMAP242X_GPIO4_BASE (void __iomem *)0x4801e000
91
92 #define OMAP243X_GPIO1_BASE (void __iomem *)0x4900C000
93 #define OMAP243X_GPIO2_BASE (void __iomem *)0x4900E000
94 #define OMAP243X_GPIO3_BASE (void __iomem *)0x49010000
95 #define OMAP243X_GPIO4_BASE (void __iomem *)0x49012000
96 #define OMAP243X_GPIO5_BASE (void __iomem *)0x480B6000
97
98 #define OMAP24XX_GPIO_REVISION 0x0000
99 #define OMAP24XX_GPIO_SYSCONFIG 0x0010
100 #define OMAP24XX_GPIO_SYSSTATUS 0x0014
101 #define OMAP24XX_GPIO_IRQSTATUS1 0x0018
102 #define OMAP24XX_GPIO_IRQSTATUS2 0x0028
103 #define OMAP24XX_GPIO_IRQENABLE2 0x002c
104 #define OMAP24XX_GPIO_IRQENABLE1 0x001c
105 #define OMAP24XX_GPIO_CTRL 0x0030
106 #define OMAP24XX_GPIO_OE 0x0034
107 #define OMAP24XX_GPIO_DATAIN 0x0038
108 #define OMAP24XX_GPIO_DATAOUT 0x003c
109 #define OMAP24XX_GPIO_LEVELDETECT0 0x0040
110 #define OMAP24XX_GPIO_LEVELDETECT1 0x0044
111 #define OMAP24XX_GPIO_RISINGDETECT 0x0048
112 #define OMAP24XX_GPIO_FALLINGDETECT 0x004c
113 #define OMAP24XX_GPIO_DEBOUNCE_EN 0x0050
114 #define OMAP24XX_GPIO_DEBOUNCE_VAL 0x0054
115 #define OMAP24XX_GPIO_CLEARIRQENABLE1 0x0060
116 #define OMAP24XX_GPIO_SETIRQENABLE1 0x0064
117 #define OMAP24XX_GPIO_CLEARWKUENA 0x0080
118 #define OMAP24XX_GPIO_SETWKUENA 0x0084
119 #define OMAP24XX_GPIO_CLEARDATAOUT 0x0090
120 #define OMAP24XX_GPIO_SETDATAOUT 0x0094
121
122 /*
123 * omap34xx specific GPIO registers
124 */
125
126 #define OMAP34XX_GPIO1_BASE (void __iomem *)0x48310000
127 #define OMAP34XX_GPIO2_BASE (void __iomem *)0x49050000
128 #define OMAP34XX_GPIO3_BASE (void __iomem *)0x49052000
129 #define OMAP34XX_GPIO4_BASE (void __iomem *)0x49054000
130 #define OMAP34XX_GPIO5_BASE (void __iomem *)0x49056000
131 #define OMAP34XX_GPIO6_BASE (void __iomem *)0x49058000
132
133
134 struct gpio_bank {
135 void __iomem *base;
136 u16 irq;
137 u16 virtual_irq_start;
138 int method;
139 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
140 u32 suspend_wakeup;
141 u32 saved_wakeup;
142 #endif
143 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
144 u32 non_wakeup_gpios;
145 u32 enabled_non_wakeup_gpios;
146
147 u32 saved_datain;
148 u32 saved_fallingdetect;
149 u32 saved_risingdetect;
150 #endif
151 spinlock_t lock;
152 struct gpio_chip chip;
153 };
154
155 #define METHOD_MPUIO 0
156 #define METHOD_GPIO_1510 1
157 #define METHOD_GPIO_1610 2
158 #define METHOD_GPIO_730 3
159 #define METHOD_GPIO_24XX 4
160
161 #ifdef CONFIG_ARCH_OMAP16XX
162 static struct gpio_bank gpio_bank_1610[5] = {
163 { OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO},
164 { OMAP1610_GPIO1_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1610 },
165 { OMAP1610_GPIO2_BASE, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16, METHOD_GPIO_1610 },
166 { OMAP1610_GPIO3_BASE, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32, METHOD_GPIO_1610 },
167 { OMAP1610_GPIO4_BASE, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48, METHOD_GPIO_1610 },
168 };
169 #endif
170
171 #ifdef CONFIG_ARCH_OMAP15XX
172 static struct gpio_bank gpio_bank_1510[2] = {
173 { OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO },
174 { OMAP1510_GPIO_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1510 }
175 };
176 #endif
177
178 #ifdef CONFIG_ARCH_OMAP730
179 static struct gpio_bank gpio_bank_730[7] = {
180 { OMAP_MPUIO_BASE, INT_730_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO },
181 { OMAP730_GPIO1_BASE, INT_730_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_730 },
182 { OMAP730_GPIO2_BASE, INT_730_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_730 },
183 { OMAP730_GPIO3_BASE, INT_730_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_730 },
184 { OMAP730_GPIO4_BASE, INT_730_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_730 },
185 { OMAP730_GPIO5_BASE, INT_730_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_730 },
186 { OMAP730_GPIO6_BASE, INT_730_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_730 },
187 };
188 #endif
189
190 #ifdef CONFIG_ARCH_OMAP24XX
191
192 static struct gpio_bank gpio_bank_242x[4] = {
193 { OMAP242X_GPIO1_BASE, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX },
194 { OMAP242X_GPIO2_BASE, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX },
195 { OMAP242X_GPIO3_BASE, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX },
196 { OMAP242X_GPIO4_BASE, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX },
197 };
198
199 static struct gpio_bank gpio_bank_243x[5] = {
200 { OMAP243X_GPIO1_BASE, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX },
201 { OMAP243X_GPIO2_BASE, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX },
202 { OMAP243X_GPIO3_BASE, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX },
203 { OMAP243X_GPIO4_BASE, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX },
204 { OMAP243X_GPIO5_BASE, INT_24XX_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_24XX },
205 };
206
207 #endif
208
209 #ifdef CONFIG_ARCH_OMAP34XX
210 static struct gpio_bank gpio_bank_34xx[6] = {
211 { OMAP34XX_GPIO1_BASE, INT_34XX_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_24XX },
212 { OMAP34XX_GPIO2_BASE, INT_34XX_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_24XX },
213 { OMAP34XX_GPIO3_BASE, INT_34XX_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_24XX },
214 { OMAP34XX_GPIO4_BASE, INT_34XX_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_24XX },
215 { OMAP34XX_GPIO5_BASE, INT_34XX_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_24XX },
216 { OMAP34XX_GPIO6_BASE, INT_34XX_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_24XX },
217 };
218
219 #endif
220
221 static struct gpio_bank *gpio_bank;
222 static int gpio_bank_count;
223
224 static inline struct gpio_bank *get_gpio_bank(int gpio)
225 {
226 if (cpu_is_omap15xx()) {
227 if (OMAP_GPIO_IS_MPUIO(gpio))
228 return &gpio_bank[0];
229 return &gpio_bank[1];
230 }
231 if (cpu_is_omap16xx()) {
232 if (OMAP_GPIO_IS_MPUIO(gpio))
233 return &gpio_bank[0];
234 return &gpio_bank[1 + (gpio >> 4)];
235 }
236 if (cpu_is_omap730()) {
237 if (OMAP_GPIO_IS_MPUIO(gpio))
238 return &gpio_bank[0];
239 return &gpio_bank[1 + (gpio >> 5)];
240 }
241 if (cpu_is_omap24xx())
242 return &gpio_bank[gpio >> 5];
243 if (cpu_is_omap34xx())
244 return &gpio_bank[gpio >> 5];
245 }
246
247 static inline int get_gpio_index(int gpio)
248 {
249 if (cpu_is_omap730())
250 return gpio & 0x1f;
251 if (cpu_is_omap24xx())
252 return gpio & 0x1f;
253 if (cpu_is_omap34xx())
254 return gpio & 0x1f;
255 return gpio & 0x0f;
256 }
257
258 static inline int gpio_valid(int gpio)
259 {
260 if (gpio < 0)
261 return -1;
262 if (cpu_class_is_omap1() && OMAP_GPIO_IS_MPUIO(gpio)) {
263 if (gpio >= OMAP_MAX_GPIO_LINES + 16)
264 return -1;
265 return 0;
266 }
267 if (cpu_is_omap15xx() && gpio < 16)
268 return 0;
269 if ((cpu_is_omap16xx()) && gpio < 64)
270 return 0;
271 if (cpu_is_omap730() && gpio < 192)
272 return 0;
273 if (cpu_is_omap24xx() && gpio < 128)
274 return 0;
275 if (cpu_is_omap34xx() && gpio < 160)
276 return 0;
277 return -1;
278 }
279
280 static int check_gpio(int gpio)
281 {
282 if (unlikely(gpio_valid(gpio)) < 0) {
283 printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio);
284 dump_stack();
285 return -1;
286 }
287 return 0;
288 }
289
290 static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
291 {
292 void __iomem *reg = bank->base;
293 u32 l;
294
295 switch (bank->method) {
296 #ifdef CONFIG_ARCH_OMAP1
297 case METHOD_MPUIO:
298 reg += OMAP_MPUIO_IO_CNTL;
299 break;
300 #endif
301 #ifdef CONFIG_ARCH_OMAP15XX
302 case METHOD_GPIO_1510:
303 reg += OMAP1510_GPIO_DIR_CONTROL;
304 break;
305 #endif
306 #ifdef CONFIG_ARCH_OMAP16XX
307 case METHOD_GPIO_1610:
308 reg += OMAP1610_GPIO_DIRECTION;
309 break;
310 #endif
311 #ifdef CONFIG_ARCH_OMAP730
312 case METHOD_GPIO_730:
313 reg += OMAP730_GPIO_DIR_CONTROL;
314 break;
315 #endif
316 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
317 case METHOD_GPIO_24XX:
318 reg += OMAP24XX_GPIO_OE;
319 break;
320 #endif
321 default:
322 WARN_ON(1);
323 return;
324 }
325 l = __raw_readl(reg);
326 if (is_input)
327 l |= 1 << gpio;
328 else
329 l &= ~(1 << gpio);
330 __raw_writel(l, reg);
331 }
332
333 void omap_set_gpio_direction(int gpio, int is_input)
334 {
335 struct gpio_bank *bank;
336 unsigned long flags;
337
338 if (check_gpio(gpio) < 0)
339 return;
340 bank = get_gpio_bank(gpio);
341 spin_lock_irqsave(&bank->lock, flags);
342 _set_gpio_direction(bank, get_gpio_index(gpio), is_input);
343 spin_unlock_irqrestore(&bank->lock, flags);
344 }
345
346 static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
347 {
348 void __iomem *reg = bank->base;
349 u32 l = 0;
350
351 switch (bank->method) {
352 #ifdef CONFIG_ARCH_OMAP1
353 case METHOD_MPUIO:
354 reg += OMAP_MPUIO_OUTPUT;
355 l = __raw_readl(reg);
356 if (enable)
357 l |= 1 << gpio;
358 else
359 l &= ~(1 << gpio);
360 break;
361 #endif
362 #ifdef CONFIG_ARCH_OMAP15XX
363 case METHOD_GPIO_1510:
364 reg += OMAP1510_GPIO_DATA_OUTPUT;
365 l = __raw_readl(reg);
366 if (enable)
367 l |= 1 << gpio;
368 else
369 l &= ~(1 << gpio);
370 break;
371 #endif
372 #ifdef CONFIG_ARCH_OMAP16XX
373 case METHOD_GPIO_1610:
374 if (enable)
375 reg += OMAP1610_GPIO_SET_DATAOUT;
376 else
377 reg += OMAP1610_GPIO_CLEAR_DATAOUT;
378 l = 1 << gpio;
379 break;
380 #endif
381 #ifdef CONFIG_ARCH_OMAP730
382 case METHOD_GPIO_730:
383 reg += OMAP730_GPIO_DATA_OUTPUT;
384 l = __raw_readl(reg);
385 if (enable)
386 l |= 1 << gpio;
387 else
388 l &= ~(1 << gpio);
389 break;
390 #endif
391 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
392 case METHOD_GPIO_24XX:
393 if (enable)
394 reg += OMAP24XX_GPIO_SETDATAOUT;
395 else
396 reg += OMAP24XX_GPIO_CLEARDATAOUT;
397 l = 1 << gpio;
398 break;
399 #endif
400 default:
401 WARN_ON(1);
402 return;
403 }
404 __raw_writel(l, reg);
405 }
406
407 void omap_set_gpio_dataout(int gpio, int enable)
408 {
409 struct gpio_bank *bank;
410 unsigned long flags;
411
412 if (check_gpio(gpio) < 0)
413 return;
414 bank = get_gpio_bank(gpio);
415 spin_lock_irqsave(&bank->lock, flags);
416 _set_gpio_dataout(bank, get_gpio_index(gpio), enable);
417 spin_unlock_irqrestore(&bank->lock, flags);
418 }
419
420 int omap_get_gpio_datain(int gpio)
421 {
422 struct gpio_bank *bank;
423 void __iomem *reg;
424
425 if (check_gpio(gpio) < 0)
426 return -EINVAL;
427 bank = get_gpio_bank(gpio);
428 reg = bank->base;
429 switch (bank->method) {
430 #ifdef CONFIG_ARCH_OMAP1
431 case METHOD_MPUIO:
432 reg += OMAP_MPUIO_INPUT_LATCH;
433 break;
434 #endif
435 #ifdef CONFIG_ARCH_OMAP15XX
436 case METHOD_GPIO_1510:
437 reg += OMAP1510_GPIO_DATA_INPUT;
438 break;
439 #endif
440 #ifdef CONFIG_ARCH_OMAP16XX
441 case METHOD_GPIO_1610:
442 reg += OMAP1610_GPIO_DATAIN;
443 break;
444 #endif
445 #ifdef CONFIG_ARCH_OMAP730
446 case METHOD_GPIO_730:
447 reg += OMAP730_GPIO_DATA_INPUT;
448 break;
449 #endif
450 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
451 case METHOD_GPIO_24XX:
452 reg += OMAP24XX_GPIO_DATAIN;
453 break;
454 #endif
455 default:
456 return -EINVAL;
457 }
458 return (__raw_readl(reg)
459 & (1 << get_gpio_index(gpio))) != 0;
460 }
461
462 #define MOD_REG_BIT(reg, bit_mask, set) \
463 do { \
464 int l = __raw_readl(base + reg); \
465 if (set) l |= bit_mask; \
466 else l &= ~bit_mask; \
467 __raw_writel(l, base + reg); \
468 } while(0)
469
470 void omap_set_gpio_debounce(int gpio, int enable)
471 {
472 struct gpio_bank *bank;
473 void __iomem *reg;
474 u32 val, l = 1 << get_gpio_index(gpio);
475
476 if (cpu_class_is_omap1())
477 return;
478
479 bank = get_gpio_bank(gpio);
480 reg = bank->base;
481
482 reg += OMAP24XX_GPIO_DEBOUNCE_EN;
483 val = __raw_readl(reg);
484
485 if (enable)
486 val |= l;
487 else
488 val &= ~l;
489
490 __raw_writel(val, reg);
491 }
492 EXPORT_SYMBOL(omap_set_gpio_debounce);
493
494 void omap_set_gpio_debounce_time(int gpio, int enc_time)
495 {
496 struct gpio_bank *bank;
497 void __iomem *reg;
498
499 if (cpu_class_is_omap1())
500 return;
501
502 bank = get_gpio_bank(gpio);
503 reg = bank->base;
504
505 enc_time &= 0xff;
506 reg += OMAP24XX_GPIO_DEBOUNCE_VAL;
507 __raw_writel(enc_time, reg);
508 }
509 EXPORT_SYMBOL(omap_set_gpio_debounce_time);
510
511 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
512 static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
513 int trigger)
514 {
515 void __iomem *base = bank->base;
516 u32 gpio_bit = 1 << gpio;
517
518 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
519 trigger & __IRQT_LOWLVL);
520 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
521 trigger & __IRQT_HIGHLVL);
522 MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
523 trigger & __IRQT_RISEDGE);
524 MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
525 trigger & __IRQT_FALEDGE);
526
527 if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
528 if (trigger != 0)
529 __raw_writel(1 << gpio, bank->base
530 + OMAP24XX_GPIO_SETWKUENA);
531 else
532 __raw_writel(1 << gpio, bank->base
533 + OMAP24XX_GPIO_CLEARWKUENA);
534 } else {
535 if (trigger != 0)
536 bank->enabled_non_wakeup_gpios |= gpio_bit;
537 else
538 bank->enabled_non_wakeup_gpios &= ~gpio_bit;
539 }
540
541 /*
542 * FIXME: Possibly do 'set_irq_handler(j, handle_level_irq)' if only
543 * level triggering requested.
544 */
545 }
546 #endif
547
548 static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
549 {
550 void __iomem *reg = bank->base;
551 u32 l = 0;
552
553 switch (bank->method) {
554 #ifdef CONFIG_ARCH_OMAP1
555 case METHOD_MPUIO:
556 reg += OMAP_MPUIO_GPIO_INT_EDGE;
557 l = __raw_readl(reg);
558 if (trigger & __IRQT_RISEDGE)
559 l |= 1 << gpio;
560 else if (trigger & __IRQT_FALEDGE)
561 l &= ~(1 << gpio);
562 else
563 goto bad;
564 break;
565 #endif
566 #ifdef CONFIG_ARCH_OMAP15XX
567 case METHOD_GPIO_1510:
568 reg += OMAP1510_GPIO_INT_CONTROL;
569 l = __raw_readl(reg);
570 if (trigger & __IRQT_RISEDGE)
571 l |= 1 << gpio;
572 else if (trigger & __IRQT_FALEDGE)
573 l &= ~(1 << gpio);
574 else
575 goto bad;
576 break;
577 #endif
578 #ifdef CONFIG_ARCH_OMAP16XX
579 case METHOD_GPIO_1610:
580 if (gpio & 0x08)
581 reg += OMAP1610_GPIO_EDGE_CTRL2;
582 else
583 reg += OMAP1610_GPIO_EDGE_CTRL1;
584 gpio &= 0x07;
585 l = __raw_readl(reg);
586 l &= ~(3 << (gpio << 1));
587 if (trigger & __IRQT_RISEDGE)
588 l |= 2 << (gpio << 1);
589 if (trigger & __IRQT_FALEDGE)
590 l |= 1 << (gpio << 1);
591 if (trigger)
592 /* Enable wake-up during idle for dynamic tick */
593 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_SET_WAKEUPENA);
594 else
595 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA);
596 break;
597 #endif
598 #ifdef CONFIG_ARCH_OMAP730
599 case METHOD_GPIO_730:
600 reg += OMAP730_GPIO_INT_CONTROL;
601 l = __raw_readl(reg);
602 if (trigger & __IRQT_RISEDGE)
603 l |= 1 << gpio;
604 else if (trigger & __IRQT_FALEDGE)
605 l &= ~(1 << gpio);
606 else
607 goto bad;
608 break;
609 #endif
610 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
611 case METHOD_GPIO_24XX:
612 set_24xx_gpio_triggering(bank, gpio, trigger);
613 break;
614 #endif
615 default:
616 goto bad;
617 }
618 __raw_writel(l, reg);
619 return 0;
620 bad:
621 return -EINVAL;
622 }
623
624 static int gpio_irq_type(unsigned irq, unsigned type)
625 {
626 struct gpio_bank *bank;
627 unsigned gpio;
628 int retval;
629 unsigned long flags;
630
631 if (!cpu_class_is_omap2() && irq > IH_MPUIO_BASE)
632 gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
633 else
634 gpio = irq - IH_GPIO_BASE;
635
636 if (check_gpio(gpio) < 0)
637 return -EINVAL;
638
639 if (type & ~IRQ_TYPE_SENSE_MASK)
640 return -EINVAL;
641
642 /* OMAP1 allows only only edge triggering */
643 if (!cpu_class_is_omap2()
644 && (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
645 return -EINVAL;
646
647 bank = get_irq_chip_data(irq);
648 spin_lock_irqsave(&bank->lock, flags);
649 retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
650 if (retval == 0) {
651 irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
652 irq_desc[irq].status |= type;
653 }
654 spin_unlock_irqrestore(&bank->lock, flags);
655 return retval;
656 }
657
658 static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
659 {
660 void __iomem *reg = bank->base;
661
662 switch (bank->method) {
663 #ifdef CONFIG_ARCH_OMAP1
664 case METHOD_MPUIO:
665 /* MPUIO irqstatus is reset by reading the status register,
666 * so do nothing here */
667 return;
668 #endif
669 #ifdef CONFIG_ARCH_OMAP15XX
670 case METHOD_GPIO_1510:
671 reg += OMAP1510_GPIO_INT_STATUS;
672 break;
673 #endif
674 #ifdef CONFIG_ARCH_OMAP16XX
675 case METHOD_GPIO_1610:
676 reg += OMAP1610_GPIO_IRQSTATUS1;
677 break;
678 #endif
679 #ifdef CONFIG_ARCH_OMAP730
680 case METHOD_GPIO_730:
681 reg += OMAP730_GPIO_INT_STATUS;
682 break;
683 #endif
684 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
685 case METHOD_GPIO_24XX:
686 reg += OMAP24XX_GPIO_IRQSTATUS1;
687 break;
688 #endif
689 default:
690 WARN_ON(1);
691 return;
692 }
693 __raw_writel(gpio_mask, reg);
694
695 /* Workaround for clearing DSP GPIO interrupts to allow retention */
696 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
697 if (cpu_is_omap24xx() || cpu_is_omap34xx())
698 __raw_writel(gpio_mask, bank->base + OMAP24XX_GPIO_IRQSTATUS2);
699 #endif
700 }
701
702 static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
703 {
704 _clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio));
705 }
706
707 static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
708 {
709 void __iomem *reg = bank->base;
710 int inv = 0;
711 u32 l;
712 u32 mask;
713
714 switch (bank->method) {
715 #ifdef CONFIG_ARCH_OMAP1
716 case METHOD_MPUIO:
717 reg += OMAP_MPUIO_GPIO_MASKIT;
718 mask = 0xffff;
719 inv = 1;
720 break;
721 #endif
722 #ifdef CONFIG_ARCH_OMAP15XX
723 case METHOD_GPIO_1510:
724 reg += OMAP1510_GPIO_INT_MASK;
725 mask = 0xffff;
726 inv = 1;
727 break;
728 #endif
729 #ifdef CONFIG_ARCH_OMAP16XX
730 case METHOD_GPIO_1610:
731 reg += OMAP1610_GPIO_IRQENABLE1;
732 mask = 0xffff;
733 break;
734 #endif
735 #ifdef CONFIG_ARCH_OMAP730
736 case METHOD_GPIO_730:
737 reg += OMAP730_GPIO_INT_MASK;
738 mask = 0xffffffff;
739 inv = 1;
740 break;
741 #endif
742 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
743 case METHOD_GPIO_24XX:
744 reg += OMAP24XX_GPIO_IRQENABLE1;
745 mask = 0xffffffff;
746 break;
747 #endif
748 default:
749 WARN_ON(1);
750 return 0;
751 }
752
753 l = __raw_readl(reg);
754 if (inv)
755 l = ~l;
756 l &= mask;
757 return l;
758 }
759
760 static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable)
761 {
762 void __iomem *reg = bank->base;
763 u32 l;
764
765 switch (bank->method) {
766 #ifdef CONFIG_ARCH_OMAP1
767 case METHOD_MPUIO:
768 reg += OMAP_MPUIO_GPIO_MASKIT;
769 l = __raw_readl(reg);
770 if (enable)
771 l &= ~(gpio_mask);
772 else
773 l |= gpio_mask;
774 break;
775 #endif
776 #ifdef CONFIG_ARCH_OMAP15XX
777 case METHOD_GPIO_1510:
778 reg += OMAP1510_GPIO_INT_MASK;
779 l = __raw_readl(reg);
780 if (enable)
781 l &= ~(gpio_mask);
782 else
783 l |= gpio_mask;
784 break;
785 #endif
786 #ifdef CONFIG_ARCH_OMAP16XX
787 case METHOD_GPIO_1610:
788 if (enable)
789 reg += OMAP1610_GPIO_SET_IRQENABLE1;
790 else
791 reg += OMAP1610_GPIO_CLEAR_IRQENABLE1;
792 l = gpio_mask;
793 break;
794 #endif
795 #ifdef CONFIG_ARCH_OMAP730
796 case METHOD_GPIO_730:
797 reg += OMAP730_GPIO_INT_MASK;
798 l = __raw_readl(reg);
799 if (enable)
800 l &= ~(gpio_mask);
801 else
802 l |= gpio_mask;
803 break;
804 #endif
805 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
806 case METHOD_GPIO_24XX:
807 if (enable)
808 reg += OMAP24XX_GPIO_SETIRQENABLE1;
809 else
810 reg += OMAP24XX_GPIO_CLEARIRQENABLE1;
811 l = gpio_mask;
812 break;
813 #endif
814 default:
815 WARN_ON(1);
816 return;
817 }
818 __raw_writel(l, reg);
819 }
820
821 static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
822 {
823 _enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable);
824 }
825
826 /*
827 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
828 * 1510 does not seem to have a wake-up register. If JTAG is connected
829 * to the target, system will wake up always on GPIO events. While
830 * system is running all registered GPIO interrupts need to have wake-up
831 * enabled. When system is suspended, only selected GPIO interrupts need
832 * to have wake-up enabled.
833 */
834 static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
835 {
836 unsigned long flags;
837
838 switch (bank->method) {
839 #ifdef CONFIG_ARCH_OMAP16XX
840 case METHOD_MPUIO:
841 case METHOD_GPIO_1610:
842 spin_lock_irqsave(&bank->lock, flags);
843 if (enable) {
844 bank->suspend_wakeup |= (1 << gpio);
845 enable_irq_wake(bank->irq);
846 } else {
847 disable_irq_wake(bank->irq);
848 bank->suspend_wakeup &= ~(1 << gpio);
849 }
850 spin_unlock_irqrestore(&bank->lock, flags);
851 return 0;
852 #endif
853 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
854 case METHOD_GPIO_24XX:
855 if (bank->non_wakeup_gpios & (1 << gpio)) {
856 printk(KERN_ERR "Unable to modify wakeup on "
857 "non-wakeup GPIO%d\n",
858 (bank - gpio_bank) * 32 + gpio);
859 return -EINVAL;
860 }
861 spin_lock_irqsave(&bank->lock, flags);
862 if (enable) {
863 bank->suspend_wakeup |= (1 << gpio);
864 enable_irq_wake(bank->irq);
865 } else {
866 disable_irq_wake(bank->irq);
867 bank->suspend_wakeup &= ~(1 << gpio);
868 }
869 spin_unlock_irqrestore(&bank->lock, flags);
870 return 0;
871 #endif
872 default:
873 printk(KERN_ERR "Can't enable GPIO wakeup for method %i\n",
874 bank->method);
875 return -EINVAL;
876 }
877 }
878
879 static void _reset_gpio(struct gpio_bank *bank, int gpio)
880 {
881 _set_gpio_direction(bank, get_gpio_index(gpio), 1);
882 _set_gpio_irqenable(bank, gpio, 0);
883 _clear_gpio_irqstatus(bank, gpio);
884 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
885 }
886
887 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
888 static int gpio_wake_enable(unsigned int irq, unsigned int enable)
889 {
890 unsigned int gpio = irq - IH_GPIO_BASE;
891 struct gpio_bank *bank;
892 int retval;
893
894 if (check_gpio(gpio) < 0)
895 return -ENODEV;
896 bank = get_irq_chip_data(irq);
897 retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
898
899 return retval;
900 }
901
902 int omap_request_gpio(int gpio)
903 {
904 struct gpio_bank *bank;
905 unsigned long flags;
906 int status;
907
908 if (check_gpio(gpio) < 0)
909 return -EINVAL;
910
911 status = gpio_request(gpio, NULL);
912 if (status < 0)
913 return status;
914
915 bank = get_gpio_bank(gpio);
916 spin_lock_irqsave(&bank->lock, flags);
917
918 /* Set trigger to none. You need to enable the desired trigger with
919 * request_irq() or set_irq_type().
920 */
921 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
922
923 #ifdef CONFIG_ARCH_OMAP15XX
924 if (bank->method == METHOD_GPIO_1510) {
925 void __iomem *reg;
926
927 /* Claim the pin for MPU */
928 reg = bank->base + OMAP1510_GPIO_PIN_CONTROL;
929 __raw_writel(__raw_readl(reg) | (1 << get_gpio_index(gpio)), reg);
930 }
931 #endif
932 spin_unlock_irqrestore(&bank->lock, flags);
933
934 return 0;
935 }
936
937 void omap_free_gpio(int gpio)
938 {
939 struct gpio_bank *bank;
940 unsigned long flags;
941
942 if (check_gpio(gpio) < 0)
943 return;
944 bank = get_gpio_bank(gpio);
945 spin_lock_irqsave(&bank->lock, flags);
946 if (unlikely(!gpiochip_is_requested(&bank->chip,
947 get_gpio_index(gpio)))) {
948 spin_unlock_irqrestore(&bank->lock, flags);
949 printk(KERN_ERR "omap-gpio: GPIO %d wasn't reserved!\n", gpio);
950 dump_stack();
951 return;
952 }
953 #ifdef CONFIG_ARCH_OMAP16XX
954 if (bank->method == METHOD_GPIO_1610) {
955 /* Disable wake-up during idle for dynamic tick */
956 void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
957 __raw_writel(1 << get_gpio_index(gpio), reg);
958 }
959 #endif
960 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
961 if (bank->method == METHOD_GPIO_24XX) {
962 /* Disable wake-up during idle for dynamic tick */
963 void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
964 __raw_writel(1 << get_gpio_index(gpio), reg);
965 }
966 #endif
967 _reset_gpio(bank, gpio);
968 spin_unlock_irqrestore(&bank->lock, flags);
969 gpio_free(gpio);
970 }
971
972 /*
973 * We need to unmask the GPIO bank interrupt as soon as possible to
974 * avoid missing GPIO interrupts for other lines in the bank.
975 * Then we need to mask-read-clear-unmask the triggered GPIO lines
976 * in the bank to avoid missing nested interrupts for a GPIO line.
977 * If we wait to unmask individual GPIO lines in the bank after the
978 * line's interrupt handler has been run, we may miss some nested
979 * interrupts.
980 */
981 static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
982 {
983 void __iomem *isr_reg = NULL;
984 u32 isr;
985 unsigned int gpio_irq;
986 struct gpio_bank *bank;
987 u32 retrigger = 0;
988 int unmasked = 0;
989
990 desc->chip->ack(irq);
991
992 bank = get_irq_data(irq);
993 #ifdef CONFIG_ARCH_OMAP1
994 if (bank->method == METHOD_MPUIO)
995 isr_reg = bank->base + OMAP_MPUIO_GPIO_INT;
996 #endif
997 #ifdef CONFIG_ARCH_OMAP15XX
998 if (bank->method == METHOD_GPIO_1510)
999 isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS;
1000 #endif
1001 #if defined(CONFIG_ARCH_OMAP16XX)
1002 if (bank->method == METHOD_GPIO_1610)
1003 isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1;
1004 #endif
1005 #ifdef CONFIG_ARCH_OMAP730
1006 if (bank->method == METHOD_GPIO_730)
1007 isr_reg = bank->base + OMAP730_GPIO_INT_STATUS;
1008 #endif
1009 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1010 if (bank->method == METHOD_GPIO_24XX)
1011 isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
1012 #endif
1013 while(1) {
1014 u32 isr_saved, level_mask = 0;
1015 u32 enabled;
1016
1017 enabled = _get_gpio_irqbank_mask(bank);
1018 isr_saved = isr = __raw_readl(isr_reg) & enabled;
1019
1020 if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
1021 isr &= 0x0000ffff;
1022
1023 if (cpu_class_is_omap2()) {
1024 level_mask =
1025 __raw_readl(bank->base +
1026 OMAP24XX_GPIO_LEVELDETECT0) |
1027 __raw_readl(bank->base +
1028 OMAP24XX_GPIO_LEVELDETECT1);
1029 level_mask &= enabled;
1030 }
1031
1032 /* clear edge sensitive interrupts before handler(s) are
1033 called so that we don't miss any interrupt occurred while
1034 executing them */
1035 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 0);
1036 _clear_gpio_irqbank(bank, isr_saved & ~level_mask);
1037 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 1);
1038
1039 /* if there is only edge sensitive GPIO pin interrupts
1040 configured, we could unmask GPIO bank interrupt immediately */
1041 if (!level_mask && !unmasked) {
1042 unmasked = 1;
1043 desc->chip->unmask(irq);
1044 }
1045
1046 isr |= retrigger;
1047 retrigger = 0;
1048 if (!isr)
1049 break;
1050
1051 gpio_irq = bank->virtual_irq_start;
1052 for (; isr != 0; isr >>= 1, gpio_irq++) {
1053 struct irq_desc *d;
1054 int irq_mask;
1055 if (!(isr & 1))
1056 continue;
1057 d = irq_desc + gpio_irq;
1058 /* Don't run the handler if it's already running
1059 * or was disabled lazely.
1060 */
1061 if (unlikely((d->depth ||
1062 (d->status & IRQ_INPROGRESS)))) {
1063 irq_mask = 1 <<
1064 (gpio_irq - bank->virtual_irq_start);
1065 /* The unmasking will be done by
1066 * enable_irq in case it is disabled or
1067 * after returning from the handler if
1068 * it's already running.
1069 */
1070 _enable_gpio_irqbank(bank, irq_mask, 0);
1071 if (!d->depth) {
1072 /* Level triggered interrupts
1073 * won't ever be reentered
1074 */
1075 BUG_ON(level_mask & irq_mask);
1076 d->status |= IRQ_PENDING;
1077 }
1078 continue;
1079 }
1080
1081 desc_handle_irq(gpio_irq, d);
1082
1083 if (unlikely((d->status & IRQ_PENDING) && !d->depth)) {
1084 irq_mask = 1 <<
1085 (gpio_irq - bank->virtual_irq_start);
1086 d->status &= ~IRQ_PENDING;
1087 _enable_gpio_irqbank(bank, irq_mask, 1);
1088 retrigger |= irq_mask;
1089 }
1090 }
1091
1092 if (cpu_class_is_omap2()) {
1093 /* clear level sensitive interrupts after handler(s) */
1094 _enable_gpio_irqbank(bank, isr_saved & level_mask, 0);
1095 _clear_gpio_irqbank(bank, isr_saved & level_mask);
1096 _enable_gpio_irqbank(bank, isr_saved & level_mask, 1);
1097 }
1098
1099 }
1100 /* if bank has any level sensitive GPIO pin interrupt
1101 configured, we must unmask the bank interrupt only after
1102 handler(s) are executed in order to avoid spurious bank
1103 interrupt */
1104 if (!unmasked)
1105 desc->chip->unmask(irq);
1106
1107 }
1108
1109 static void gpio_irq_shutdown(unsigned int irq)
1110 {
1111 unsigned int gpio = irq - IH_GPIO_BASE;
1112 struct gpio_bank *bank = get_irq_chip_data(irq);
1113
1114 _reset_gpio(bank, gpio);
1115 }
1116
1117 static void gpio_ack_irq(unsigned int irq)
1118 {
1119 unsigned int gpio = irq - IH_GPIO_BASE;
1120 struct gpio_bank *bank = get_irq_chip_data(irq);
1121
1122 _clear_gpio_irqstatus(bank, gpio);
1123 }
1124
1125 static void gpio_mask_irq(unsigned int irq)
1126 {
1127 unsigned int gpio = irq - IH_GPIO_BASE;
1128 struct gpio_bank *bank = get_irq_chip_data(irq);
1129
1130 _set_gpio_irqenable(bank, gpio, 0);
1131 }
1132
1133 static void gpio_unmask_irq(unsigned int irq)
1134 {
1135 unsigned int gpio = irq - IH_GPIO_BASE;
1136 struct gpio_bank *bank = get_irq_chip_data(irq);
1137
1138 _set_gpio_irqenable(bank, gpio, 1);
1139 }
1140
1141 static struct irq_chip gpio_irq_chip = {
1142 .name = "GPIO",
1143 .shutdown = gpio_irq_shutdown,
1144 .ack = gpio_ack_irq,
1145 .mask = gpio_mask_irq,
1146 .unmask = gpio_unmask_irq,
1147 .set_type = gpio_irq_type,
1148 .set_wake = gpio_wake_enable,
1149 };
1150
1151 /*---------------------------------------------------------------------*/
1152
1153 #ifdef CONFIG_ARCH_OMAP1
1154
1155 /* MPUIO uses the always-on 32k clock */
1156
1157 static void mpuio_ack_irq(unsigned int irq)
1158 {
1159 /* The ISR is reset automatically, so do nothing here. */
1160 }
1161
1162 static void mpuio_mask_irq(unsigned int irq)
1163 {
1164 unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
1165 struct gpio_bank *bank = get_irq_chip_data(irq);
1166
1167 _set_gpio_irqenable(bank, gpio, 0);
1168 }
1169
1170 static void mpuio_unmask_irq(unsigned int irq)
1171 {
1172 unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
1173 struct gpio_bank *bank = get_irq_chip_data(irq);
1174
1175 _set_gpio_irqenable(bank, gpio, 1);
1176 }
1177
1178 static struct irq_chip mpuio_irq_chip = {
1179 .name = "MPUIO",
1180 .ack = mpuio_ack_irq,
1181 .mask = mpuio_mask_irq,
1182 .unmask = mpuio_unmask_irq,
1183 .set_type = gpio_irq_type,
1184 #ifdef CONFIG_ARCH_OMAP16XX
1185 /* REVISIT: assuming only 16xx supports MPUIO wake events */
1186 .set_wake = gpio_wake_enable,
1187 #endif
1188 };
1189
1190
1191 #define bank_is_mpuio(bank) ((bank)->method == METHOD_MPUIO)
1192
1193
1194 #ifdef CONFIG_ARCH_OMAP16XX
1195
1196 #include <linux/platform_device.h>
1197
1198 static int omap_mpuio_suspend_late(struct platform_device *pdev, pm_message_t mesg)
1199 {
1200 struct gpio_bank *bank = platform_get_drvdata(pdev);
1201 void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
1202 unsigned long flags;
1203
1204 spin_lock_irqsave(&bank->lock, flags);
1205 bank->saved_wakeup = __raw_readl(mask_reg);
1206 __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
1207 spin_unlock_irqrestore(&bank->lock, flags);
1208
1209 return 0;
1210 }
1211
1212 static int omap_mpuio_resume_early(struct platform_device *pdev)
1213 {
1214 struct gpio_bank *bank = platform_get_drvdata(pdev);
1215 void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
1216 unsigned long flags;
1217
1218 spin_lock_irqsave(&bank->lock, flags);
1219 __raw_writel(bank->saved_wakeup, mask_reg);
1220 spin_unlock_irqrestore(&bank->lock, flags);
1221
1222 return 0;
1223 }
1224
1225 /* use platform_driver for this, now that there's no longer any
1226 * point to sys_device (other than not disturbing old code).
1227 */
1228 static struct platform_driver omap_mpuio_driver = {
1229 .suspend_late = omap_mpuio_suspend_late,
1230 .resume_early = omap_mpuio_resume_early,
1231 .driver = {
1232 .name = "mpuio",
1233 },
1234 };
1235
1236 static struct platform_device omap_mpuio_device = {
1237 .name = "mpuio",
1238 .id = -1,
1239 .dev = {
1240 .driver = &omap_mpuio_driver.driver,
1241 }
1242 /* could list the /proc/iomem resources */
1243 };
1244
1245 static inline void mpuio_init(void)
1246 {
1247 platform_set_drvdata(&omap_mpuio_device, &gpio_bank_1610[0]);
1248
1249 if (platform_driver_register(&omap_mpuio_driver) == 0)
1250 (void) platform_device_register(&omap_mpuio_device);
1251 }
1252
1253 #else
1254 static inline void mpuio_init(void) {}
1255 #endif /* 16xx */
1256
1257 #else
1258
1259 extern struct irq_chip mpuio_irq_chip;
1260
1261 #define bank_is_mpuio(bank) 0
1262 static inline void mpuio_init(void) {}
1263
1264 #endif
1265
1266 /*---------------------------------------------------------------------*/
1267
1268 /* REVISIT these are stupid implementations! replace by ones that
1269 * don't switch on METHOD_* and which mostly avoid spinlocks
1270 */
1271
1272 static int gpio_input(struct gpio_chip *chip, unsigned offset)
1273 {
1274 struct gpio_bank *bank;
1275 unsigned long flags;
1276
1277 bank = container_of(chip, struct gpio_bank, chip);
1278 spin_lock_irqsave(&bank->lock, flags);
1279 _set_gpio_direction(bank, offset, 1);
1280 spin_unlock_irqrestore(&bank->lock, flags);
1281 return 0;
1282 }
1283
1284 static int gpio_get(struct gpio_chip *chip, unsigned offset)
1285 {
1286 return omap_get_gpio_datain(chip->base + offset);
1287 }
1288
1289 static int gpio_output(struct gpio_chip *chip, unsigned offset, int value)
1290 {
1291 struct gpio_bank *bank;
1292 unsigned long flags;
1293
1294 bank = container_of(chip, struct gpio_bank, chip);
1295 spin_lock_irqsave(&bank->lock, flags);
1296 _set_gpio_dataout(bank, offset, value);
1297 _set_gpio_direction(bank, offset, 0);
1298 spin_unlock_irqrestore(&bank->lock, flags);
1299 return 0;
1300 }
1301
1302 static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1303 {
1304 struct gpio_bank *bank;
1305 unsigned long flags;
1306
1307 bank = container_of(chip, struct gpio_bank, chip);
1308 spin_lock_irqsave(&bank->lock, flags);
1309 _set_gpio_dataout(bank, offset, value);
1310 spin_unlock_irqrestore(&bank->lock, flags);
1311 }
1312
1313 /*---------------------------------------------------------------------*/
1314
1315 static int initialized;
1316 #if !defined(CONFIG_ARCH_OMAP3)
1317 static struct clk * gpio_ick;
1318 #endif
1319
1320 #if defined(CONFIG_ARCH_OMAP2)
1321 static struct clk * gpio_fck;
1322 #endif
1323
1324 #if defined(CONFIG_ARCH_OMAP2430)
1325 static struct clk * gpio5_ick;
1326 static struct clk * gpio5_fck;
1327 #endif
1328
1329 #if defined(CONFIG_ARCH_OMAP3)
1330 static struct clk *gpio_fclks[OMAP34XX_NR_GPIOS];
1331 static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS];
1332 #endif
1333
1334 /* This lock class tells lockdep that GPIO irqs are in a different
1335 * category than their parents, so it won't report false recursion.
1336 */
1337 static struct lock_class_key gpio_lock_class;
1338
1339 static int __init _omap_gpio_init(void)
1340 {
1341 int i;
1342 int gpio = 0;
1343 struct gpio_bank *bank;
1344 #if defined(CONFIG_ARCH_OMAP3)
1345 char clk_name[11];
1346 #endif
1347
1348 initialized = 1;
1349
1350 #if defined(CONFIG_ARCH_OMAP1)
1351 if (cpu_is_omap15xx()) {
1352 gpio_ick = clk_get(NULL, "arm_gpio_ck");
1353 if (IS_ERR(gpio_ick))
1354 printk("Could not get arm_gpio_ck\n");
1355 else
1356 clk_enable(gpio_ick);
1357 }
1358 #endif
1359 #if defined(CONFIG_ARCH_OMAP2)
1360 if (cpu_class_is_omap2()) {
1361 gpio_ick = clk_get(NULL, "gpios_ick");
1362 if (IS_ERR(gpio_ick))
1363 printk("Could not get gpios_ick\n");
1364 else
1365 clk_enable(gpio_ick);
1366 gpio_fck = clk_get(NULL, "gpios_fck");
1367 if (IS_ERR(gpio_fck))
1368 printk("Could not get gpios_fck\n");
1369 else
1370 clk_enable(gpio_fck);
1371
1372 /*
1373 * On 2430 & 3430 GPIO 5 uses CORE L4 ICLK
1374 */
1375 #if defined(CONFIG_ARCH_OMAP2430)
1376 if (cpu_is_omap2430()) {
1377 gpio5_ick = clk_get(NULL, "gpio5_ick");
1378 if (IS_ERR(gpio5_ick))
1379 printk("Could not get gpio5_ick\n");
1380 else
1381 clk_enable(gpio5_ick);
1382 gpio5_fck = clk_get(NULL, "gpio5_fck");
1383 if (IS_ERR(gpio5_fck))
1384 printk("Could not get gpio5_fck\n");
1385 else
1386 clk_enable(gpio5_fck);
1387 }
1388 #endif
1389 }
1390 #endif
1391
1392 #if defined(CONFIG_ARCH_OMAP3)
1393 if (cpu_is_omap34xx()) {
1394 for (i = 0; i < OMAP34XX_NR_GPIOS; i++) {
1395 sprintf(clk_name, "gpio%d_ick", i + 1);
1396 gpio_iclks[i] = clk_get(NULL, clk_name);
1397 if (IS_ERR(gpio_iclks[i]))
1398 printk(KERN_ERR "Could not get %s\n", clk_name);
1399 else
1400 clk_enable(gpio_iclks[i]);
1401 sprintf(clk_name, "gpio%d_fck", i + 1);
1402 gpio_fclks[i] = clk_get(NULL, clk_name);
1403 if (IS_ERR(gpio_fclks[i]))
1404 printk(KERN_ERR "Could not get %s\n", clk_name);
1405 else
1406 clk_enable(gpio_fclks[i]);
1407 }
1408 }
1409 #endif
1410
1411
1412 #ifdef CONFIG_ARCH_OMAP15XX
1413 if (cpu_is_omap15xx()) {
1414 printk(KERN_INFO "OMAP1510 GPIO hardware\n");
1415 gpio_bank_count = 2;
1416 gpio_bank = gpio_bank_1510;
1417 }
1418 #endif
1419 #if defined(CONFIG_ARCH_OMAP16XX)
1420 if (cpu_is_omap16xx()) {
1421 u32 rev;
1422
1423 gpio_bank_count = 5;
1424 gpio_bank = gpio_bank_1610;
1425 rev = omap_readw(gpio_bank[1].base + OMAP1610_GPIO_REVISION);
1426 printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
1427 (rev >> 4) & 0x0f, rev & 0x0f);
1428 }
1429 #endif
1430 #ifdef CONFIG_ARCH_OMAP730
1431 if (cpu_is_omap730()) {
1432 printk(KERN_INFO "OMAP730 GPIO hardware\n");
1433 gpio_bank_count = 7;
1434 gpio_bank = gpio_bank_730;
1435 }
1436 #endif
1437
1438 #ifdef CONFIG_ARCH_OMAP24XX
1439 if (cpu_is_omap242x()) {
1440 int rev;
1441
1442 gpio_bank_count = 4;
1443 gpio_bank = gpio_bank_242x;
1444 rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
1445 printk(KERN_INFO "OMAP242x GPIO hardware version %d.%d\n",
1446 (rev >> 4) & 0x0f, rev & 0x0f);
1447 }
1448 if (cpu_is_omap243x()) {
1449 int rev;
1450
1451 gpio_bank_count = 5;
1452 gpio_bank = gpio_bank_243x;
1453 rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
1454 printk(KERN_INFO "OMAP243x GPIO hardware version %d.%d\n",
1455 (rev >> 4) & 0x0f, rev & 0x0f);
1456 }
1457 #endif
1458 #ifdef CONFIG_ARCH_OMAP34XX
1459 if (cpu_is_omap34xx()) {
1460 int rev;
1461
1462 gpio_bank_count = OMAP34XX_NR_GPIOS;
1463 gpio_bank = gpio_bank_34xx;
1464 rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
1465 printk(KERN_INFO "OMAP34xx GPIO hardware version %d.%d\n",
1466 (rev >> 4) & 0x0f, rev & 0x0f);
1467 }
1468 #endif
1469 for (i = 0; i < gpio_bank_count; i++) {
1470 int j, gpio_count = 16;
1471
1472 bank = &gpio_bank[i];
1473 bank->base = IO_ADDRESS(bank->base);
1474 spin_lock_init(&bank->lock);
1475 if (bank_is_mpuio(bank))
1476 omap_writew(0xFFFF, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_MASKIT);
1477 if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) {
1478 __raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK);
1479 __raw_writew(0x0000, bank->base + OMAP1510_GPIO_INT_STATUS);
1480 }
1481 if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) {
1482 __raw_writew(0x0000, bank->base + OMAP1610_GPIO_IRQENABLE1);
1483 __raw_writew(0xffff, bank->base + OMAP1610_GPIO_IRQSTATUS1);
1484 __raw_writew(0x0014, bank->base + OMAP1610_GPIO_SYSCONFIG);
1485 }
1486 if (cpu_is_omap730() && bank->method == METHOD_GPIO_730) {
1487 __raw_writel(0xffffffff, bank->base + OMAP730_GPIO_INT_MASK);
1488 __raw_writel(0x00000000, bank->base + OMAP730_GPIO_INT_STATUS);
1489
1490 gpio_count = 32; /* 730 has 32-bit GPIOs */
1491 }
1492
1493 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1494 if (bank->method == METHOD_GPIO_24XX) {
1495 static const u32 non_wakeup_gpios[] = {
1496 0xe203ffc0, 0x08700040
1497 };
1498
1499 __raw_writel(0x00000000, bank->base + OMAP24XX_GPIO_IRQENABLE1);
1500 __raw_writel(0xffffffff, bank->base + OMAP24XX_GPIO_IRQSTATUS1);
1501 __raw_writew(0x0015, bank->base + OMAP24XX_GPIO_SYSCONFIG);
1502
1503 /* Initialize interface clock ungated, module enabled */
1504 __raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL);
1505 if (i < ARRAY_SIZE(non_wakeup_gpios))
1506 bank->non_wakeup_gpios = non_wakeup_gpios[i];
1507 gpio_count = 32;
1508 }
1509 #endif
1510
1511 /* REVISIT eventually switch from OMAP-specific gpio structs
1512 * over to the generic ones
1513 */
1514 bank->chip.direction_input = gpio_input;
1515 bank->chip.get = gpio_get;
1516 bank->chip.direction_output = gpio_output;
1517 bank->chip.set = gpio_set;
1518 if (bank_is_mpuio(bank)) {
1519 bank->chip.label = "mpuio";
1520 bank->chip.base = OMAP_MPUIO(0);
1521 } else {
1522 bank->chip.label = "gpio";
1523 bank->chip.base = gpio;
1524 gpio += gpio_count;
1525 }
1526 bank->chip.ngpio = gpio_count;
1527
1528 gpiochip_add(&bank->chip);
1529
1530 for (j = bank->virtual_irq_start;
1531 j < bank->virtual_irq_start + gpio_count; j++) {
1532 lockdep_set_class(&irq_desc[j].lock, &gpio_lock_class);
1533 set_irq_chip_data(j, bank);
1534 if (bank_is_mpuio(bank))
1535 set_irq_chip(j, &mpuio_irq_chip);
1536 else
1537 set_irq_chip(j, &gpio_irq_chip);
1538 set_irq_handler(j, handle_simple_irq);
1539 set_irq_flags(j, IRQF_VALID);
1540 }
1541 set_irq_chained_handler(bank->irq, gpio_irq_handler);
1542 set_irq_data(bank->irq, bank);
1543 }
1544
1545 /* Enable system clock for GPIO module.
1546 * The CAM_CLK_CTRL *is* really the right place. */
1547 if (cpu_is_omap16xx())
1548 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, ULPD_CAM_CLK_CTRL);
1549
1550 /* Enable autoidle for the OCP interface */
1551 if (cpu_is_omap24xx())
1552 omap_writel(1 << 0, 0x48019010);
1553 if (cpu_is_omap34xx())
1554 omap_writel(1 << 0, 0x48306814);
1555
1556 return 0;
1557 }
1558
1559 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1560 static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
1561 {
1562 int i;
1563
1564 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
1565 return 0;
1566
1567 for (i = 0; i < gpio_bank_count; i++) {
1568 struct gpio_bank *bank = &gpio_bank[i];
1569 void __iomem *wake_status;
1570 void __iomem *wake_clear;
1571 void __iomem *wake_set;
1572 unsigned long flags;
1573
1574 switch (bank->method) {
1575 #ifdef CONFIG_ARCH_OMAP16XX
1576 case METHOD_GPIO_1610:
1577 wake_status = bank->base + OMAP1610_GPIO_WAKEUPENABLE;
1578 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1579 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1580 break;
1581 #endif
1582 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1583 case METHOD_GPIO_24XX:
1584 wake_status = bank->base + OMAP24XX_GPIO_SETWKUENA;
1585 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1586 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1587 break;
1588 #endif
1589 default:
1590 continue;
1591 }
1592
1593 spin_lock_irqsave(&bank->lock, flags);
1594 bank->saved_wakeup = __raw_readl(wake_status);
1595 __raw_writel(0xffffffff, wake_clear);
1596 __raw_writel(bank->suspend_wakeup, wake_set);
1597 spin_unlock_irqrestore(&bank->lock, flags);
1598 }
1599
1600 return 0;
1601 }
1602
1603 static int omap_gpio_resume(struct sys_device *dev)
1604 {
1605 int i;
1606
1607 if (!cpu_is_omap24xx() && !cpu_is_omap16xx())
1608 return 0;
1609
1610 for (i = 0; i < gpio_bank_count; i++) {
1611 struct gpio_bank *bank = &gpio_bank[i];
1612 void __iomem *wake_clear;
1613 void __iomem *wake_set;
1614 unsigned long flags;
1615
1616 switch (bank->method) {
1617 #ifdef CONFIG_ARCH_OMAP16XX
1618 case METHOD_GPIO_1610:
1619 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1620 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1621 break;
1622 #endif
1623 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1624 case METHOD_GPIO_24XX:
1625 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1626 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1627 break;
1628 #endif
1629 default:
1630 continue;
1631 }
1632
1633 spin_lock_irqsave(&bank->lock, flags);
1634 __raw_writel(0xffffffff, wake_clear);
1635 __raw_writel(bank->saved_wakeup, wake_set);
1636 spin_unlock_irqrestore(&bank->lock, flags);
1637 }
1638
1639 return 0;
1640 }
1641
1642 static struct sysdev_class omap_gpio_sysclass = {
1643 .name = "gpio",
1644 .suspend = omap_gpio_suspend,
1645 .resume = omap_gpio_resume,
1646 };
1647
1648 static struct sys_device omap_gpio_device = {
1649 .id = 0,
1650 .cls = &omap_gpio_sysclass,
1651 };
1652
1653 #endif
1654
1655 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1656
1657 static int workaround_enabled;
1658
1659 void omap2_gpio_prepare_for_retention(void)
1660 {
1661 int i, c = 0;
1662
1663 /* Remove triggering for all non-wakeup GPIOs. Otherwise spurious
1664 * IRQs will be generated. See OMAP2420 Errata item 1.101. */
1665 for (i = 0; i < gpio_bank_count; i++) {
1666 struct gpio_bank *bank = &gpio_bank[i];
1667 u32 l1, l2;
1668
1669 if (!(bank->enabled_non_wakeup_gpios))
1670 continue;
1671 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1672 bank->saved_datain = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
1673 l1 = __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
1674 l2 = __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
1675 #endif
1676 bank->saved_fallingdetect = l1;
1677 bank->saved_risingdetect = l2;
1678 l1 &= ~bank->enabled_non_wakeup_gpios;
1679 l2 &= ~bank->enabled_non_wakeup_gpios;
1680 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1681 __raw_writel(l1, bank->base + OMAP24XX_GPIO_FALLINGDETECT);
1682 __raw_writel(l2, bank->base + OMAP24XX_GPIO_RISINGDETECT);
1683 #endif
1684 c++;
1685 }
1686 if (!c) {
1687 workaround_enabled = 0;
1688 return;
1689 }
1690 workaround_enabled = 1;
1691 }
1692
1693 void omap2_gpio_resume_after_retention(void)
1694 {
1695 int i;
1696
1697 if (!workaround_enabled)
1698 return;
1699 for (i = 0; i < gpio_bank_count; i++) {
1700 struct gpio_bank *bank = &gpio_bank[i];
1701 u32 l;
1702
1703 if (!(bank->enabled_non_wakeup_gpios))
1704 continue;
1705 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1706 __raw_writel(bank->saved_fallingdetect,
1707 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
1708 __raw_writel(bank->saved_risingdetect,
1709 bank->base + OMAP24XX_GPIO_RISINGDETECT);
1710 #endif
1711 /* Check if any of the non-wakeup interrupt GPIOs have changed
1712 * state. If so, generate an IRQ by software. This is
1713 * horribly racy, but it's the best we can do to work around
1714 * this silicon bug. */
1715 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1716 l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
1717 #endif
1718 l ^= bank->saved_datain;
1719 l &= bank->non_wakeup_gpios;
1720 if (l) {
1721 u32 old0, old1;
1722 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1723 old0 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
1724 old1 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
1725 __raw_writel(old0 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT0);
1726 __raw_writel(old1 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT1);
1727 __raw_writel(old0, bank->base + OMAP24XX_GPIO_LEVELDETECT0);
1728 __raw_writel(old1, bank->base + OMAP24XX_GPIO_LEVELDETECT1);
1729 #endif
1730 }
1731 }
1732
1733 }
1734
1735 #endif
1736
1737 /*
1738 * This may get called early from board specific init
1739 * for boards that have interrupts routed via FPGA.
1740 */
1741 int __init omap_gpio_init(void)
1742 {
1743 if (!initialized)
1744 return _omap_gpio_init();
1745 else
1746 return 0;
1747 }
1748
1749 static int __init omap_gpio_sysinit(void)
1750 {
1751 int ret = 0;
1752
1753 if (!initialized)
1754 ret = _omap_gpio_init();
1755
1756 mpuio_init();
1757
1758 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
1759 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
1760 if (ret == 0) {
1761 ret = sysdev_class_register(&omap_gpio_sysclass);
1762 if (ret == 0)
1763 ret = sysdev_register(&omap_gpio_device);
1764 }
1765 }
1766 #endif
1767
1768 return ret;
1769 }
1770
1771 EXPORT_SYMBOL(omap_request_gpio);
1772 EXPORT_SYMBOL(omap_free_gpio);
1773 EXPORT_SYMBOL(omap_set_gpio_direction);
1774 EXPORT_SYMBOL(omap_set_gpio_dataout);
1775 EXPORT_SYMBOL(omap_get_gpio_datain);
1776
1777 arch_initcall(omap_gpio_sysinit);
1778
1779
1780 #ifdef CONFIG_DEBUG_FS
1781
1782 #include <linux/debugfs.h>
1783 #include <linux/seq_file.h>
1784
1785 static int gpio_is_input(struct gpio_bank *bank, int mask)
1786 {
1787 void __iomem *reg = bank->base;
1788
1789 switch (bank->method) {
1790 case METHOD_MPUIO:
1791 reg += OMAP_MPUIO_IO_CNTL;
1792 break;
1793 case METHOD_GPIO_1510:
1794 reg += OMAP1510_GPIO_DIR_CONTROL;
1795 break;
1796 case METHOD_GPIO_1610:
1797 reg += OMAP1610_GPIO_DIRECTION;
1798 break;
1799 case METHOD_GPIO_730:
1800 reg += OMAP730_GPIO_DIR_CONTROL;
1801 break;
1802 case METHOD_GPIO_24XX:
1803 reg += OMAP24XX_GPIO_OE;
1804 break;
1805 }
1806 return __raw_readl(reg) & mask;
1807 }
1808
1809
1810 static int dbg_gpio_show(struct seq_file *s, void *unused)
1811 {
1812 unsigned i, j, gpio;
1813
1814 for (i = 0, gpio = 0; i < gpio_bank_count; i++) {
1815 struct gpio_bank *bank = gpio_bank + i;
1816 unsigned bankwidth = 16;
1817 u32 mask = 1;
1818
1819 if (bank_is_mpuio(bank))
1820 gpio = OMAP_MPUIO(0);
1821 else if (cpu_class_is_omap2() || cpu_is_omap730())
1822 bankwidth = 32;
1823
1824 for (j = 0; j < bankwidth; j++, gpio++, mask <<= 1) {
1825 unsigned irq, value, is_in, irqstat;
1826 const char *label;
1827
1828 label = gpiochip_is_requested(&bank->chip, j);
1829 if (!label)
1830 continue;
1831
1832 irq = bank->virtual_irq_start + j;
1833 value = omap_get_gpio_datain(gpio);
1834 is_in = gpio_is_input(bank, mask);
1835
1836 if (bank_is_mpuio(bank))
1837 seq_printf(s, "MPUIO %2d ", j);
1838 else
1839 seq_printf(s, "GPIO %3d ", gpio);
1840 seq_printf(s, "(%10s): %s %s",
1841 label,
1842 is_in ? "in " : "out",
1843 value ? "hi" : "lo");
1844
1845 /* FIXME for at least omap2, show pullup/pulldown state */
1846
1847 irqstat = irq_desc[irq].status;
1848 if (is_in && ((bank->suspend_wakeup & mask)
1849 || irqstat & IRQ_TYPE_SENSE_MASK)) {
1850 char *trigger = NULL;
1851
1852 switch (irqstat & IRQ_TYPE_SENSE_MASK) {
1853 case IRQ_TYPE_EDGE_FALLING:
1854 trigger = "falling";
1855 break;
1856 case IRQ_TYPE_EDGE_RISING:
1857 trigger = "rising";
1858 break;
1859 case IRQ_TYPE_EDGE_BOTH:
1860 trigger = "bothedge";
1861 break;
1862 case IRQ_TYPE_LEVEL_LOW:
1863 trigger = "low";
1864 break;
1865 case IRQ_TYPE_LEVEL_HIGH:
1866 trigger = "high";
1867 break;
1868 case IRQ_TYPE_NONE:
1869 trigger = "(?)";
1870 break;
1871 }
1872 seq_printf(s, ", irq-%d %-8s%s",
1873 irq, trigger,
1874 (bank->suspend_wakeup & mask)
1875 ? " wakeup" : "");
1876 }
1877 seq_printf(s, "\n");
1878 }
1879
1880 if (bank_is_mpuio(bank)) {
1881 seq_printf(s, "\n");
1882 gpio = 0;
1883 }
1884 }
1885 return 0;
1886 }
1887
1888 static int dbg_gpio_open(struct inode *inode, struct file *file)
1889 {
1890 return single_open(file, dbg_gpio_show, &inode->i_private);
1891 }
1892
1893 static const struct file_operations debug_fops = {
1894 .open = dbg_gpio_open,
1895 .read = seq_read,
1896 .llseek = seq_lseek,
1897 .release = single_release,
1898 };
1899
1900 static int __init omap_gpio_debuginit(void)
1901 {
1902 (void) debugfs_create_file("omap_gpio", S_IRUGO,
1903 NULL, NULL, &debug_fops);
1904 return 0;
1905 }
1906 late_initcall(omap_gpio_debuginit);
1907 #endif
Linux kernel - Deliverables
This page took 0.088599 seconds and 6 git commands to generate.