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Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001/*
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01002 * Support functions for OMAP GPIO
3 *
Tony Lindgren92105bb2005-09-07 17:20:26 +01004 * Copyright (C) 2003-2005 Nokia Corporation
Jan Engelhardt96de0e22007-10-19 23:21:04 +02005 * Written by Juha Yrjölä <juha.yrjola@nokia.com>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01006 *
Santosh Shilimkar44169072009-05-28 14:16:04 -07007 * Copyright (C) 2009 Texas Instruments
8 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
9 *
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010010 * 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 */
14
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010015#include <linux/init.h>
16#include <linux/module.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010017#include <linux/interrupt.h>
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +020018#include <linux/syscore_ops.h>
Tony Lindgren92105bb2005-09-07 17:20:26 +010019#include <linux/err.h>
Russell Kingf8ce2542006-01-07 16:15:52 +000020#include <linux/clk.h>
Russell Kingfced80c2008-09-06 12:10:45 +010021#include <linux/io.h>
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -080022#include <linux/slab.h>
23#include <linux/pm_runtime.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010024
Russell Kinga09e64f2008-08-05 16:14:15 +010025#include <mach/hardware.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010026#include <asm/irq.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010027#include <mach/irqs.h>
28#include <mach/gpio.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010029#include <asm/mach/irq.h>
30
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010031struct gpio_bank {
Tony Lindgren9f7065d2009-10-19 15:25:20 -070032 unsigned long pbase;
Tony Lindgren92105bb2005-09-07 17:20:26 +010033 void __iomem *base;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010034 u16 irq;
35 u16 virtual_irq_start;
Tony Lindgren92105bb2005-09-07 17:20:26 +010036 int method;
Tony Lindgren140455f2010-02-12 12:26:48 -080037#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
Tony Lindgren92105bb2005-09-07 17:20:26 +010038 u32 suspend_wakeup;
39 u32 saved_wakeup;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -080040#endif
Juha Yrjola3ac4fa92006-12-06 17:13:52 -080041 u32 non_wakeup_gpios;
42 u32 enabled_non_wakeup_gpios;
43
44 u32 saved_datain;
45 u32 saved_fallingdetect;
46 u32 saved_risingdetect;
Kevin Hilmanb144ff62008-01-16 21:56:15 -080047 u32 level_mask;
Cory Maccarrone4318f362010-01-08 10:29:04 -080048 u32 toggle_mask;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010049 spinlock_t lock;
David Brownell52e31342008-03-03 12:43:23 -080050 struct gpio_chip chip;
Jouni Hogander89db9482008-12-10 17:35:24 -080051 struct clk *dbck;
Charulatha V058af1e2009-11-22 10:11:25 -080052 u32 mod_usage;
Kevin Hilman8865b9b2009-01-27 11:15:34 -080053 u32 dbck_enable_mask;
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -080054 struct device *dev;
55 bool dbck_flag;
Tony Lindgren5de62b82010-12-07 16:26:58 -080056 int stride;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010057};
58
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -080059#ifdef CONFIG_ARCH_OMAP3
Rajendra Nayak40c670f2008-09-26 17:47:48 +053060struct omap3_gpio_regs {
Rajendra Nayak40c670f2008-09-26 17:47:48 +053061 u32 irqenable1;
62 u32 irqenable2;
63 u32 wake_en;
64 u32 ctrl;
65 u32 oe;
66 u32 leveldetect0;
67 u32 leveldetect1;
68 u32 risingdetect;
69 u32 fallingdetect;
70 u32 dataout;
Rajendra Nayak40c670f2008-09-26 17:47:48 +053071};
72
73static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS];
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -080074#endif
75
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -080076/*
77 * TODO: Cleanup gpio_bank usage as it is having information
78 * related to all instances of the device
79 */
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010080static struct gpio_bank *gpio_bank;
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -080081
82static int bank_width;
83
Varadarajan, Charulathac95d10b2010-12-07 16:26:56 -080084/* TODO: Analyze removing gpio_bank_count usage from driver code */
85int gpio_bank_count;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010086
87static inline struct gpio_bank *get_gpio_bank(int gpio)
88{
Tony Lindgren6e60e792006-04-02 17:46:23 +010089 if (cpu_is_omap15xx()) {
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010090 if (OMAP_GPIO_IS_MPUIO(gpio))
91 return &gpio_bank[0];
92 return &gpio_bank[1];
93 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010094 if (cpu_is_omap16xx()) {
95 if (OMAP_GPIO_IS_MPUIO(gpio))
96 return &gpio_bank[0];
97 return &gpio_bank[1 + (gpio >> 4)];
98 }
Zebediah C. McClure56739a62009-03-23 18:07:40 -070099 if (cpu_is_omap7xx()) {
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100100 if (OMAP_GPIO_IS_MPUIO(gpio))
101 return &gpio_bank[0];
102 return &gpio_bank[1 + (gpio >> 5)];
103 }
Tony Lindgren92105bb2005-09-07 17:20:26 +0100104 if (cpu_is_omap24xx())
105 return &gpio_bank[gpio >> 5];
Santosh Shilimkar44169072009-05-28 14:16:04 -0700106 if (cpu_is_omap34xx() || cpu_is_omap44xx())
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -0800107 return &gpio_bank[gpio >> 5];
David Brownelle031ab22008-12-10 17:35:27 -0800108 BUG();
109 return NULL;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100110}
111
112static inline int get_gpio_index(int gpio)
113{
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700114 if (cpu_is_omap7xx())
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100115 return gpio & 0x1f;
Tony Lindgren92105bb2005-09-07 17:20:26 +0100116 if (cpu_is_omap24xx())
117 return gpio & 0x1f;
Santosh Shilimkar44169072009-05-28 14:16:04 -0700118 if (cpu_is_omap34xx() || cpu_is_omap44xx())
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -0800119 return gpio & 0x1f;
Tony Lindgren92105bb2005-09-07 17:20:26 +0100120 return gpio & 0x0f;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100121}
122
123static inline int gpio_valid(int gpio)
124{
125 if (gpio < 0)
126 return -1;
Tony Lindgrend11ac972008-01-12 15:35:04 -0800127 if (cpu_class_is_omap1() && OMAP_GPIO_IS_MPUIO(gpio)) {
Jonathan McDowell193e68b2006-09-25 12:41:30 +0300128 if (gpio >= OMAP_MAX_GPIO_LINES + 16)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100129 return -1;
130 return 0;
131 }
Tony Lindgren6e60e792006-04-02 17:46:23 +0100132 if (cpu_is_omap15xx() && gpio < 16)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100133 return 0;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100134 if ((cpu_is_omap16xx()) && gpio < 64)
135 return 0;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700136 if (cpu_is_omap7xx() && gpio < 192)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100137 return 0;
Tony Lindgren25d6f632010-08-02 14:21:39 +0300138 if (cpu_is_omap2420() && gpio < 128)
139 return 0;
140 if (cpu_is_omap2430() && gpio < 160)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100141 return 0;
Santosh Shilimkar44169072009-05-28 14:16:04 -0700142 if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && gpio < 192)
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -0800143 return 0;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100144 return -1;
145}
146
147static int check_gpio(int gpio)
148{
Roel Kluind32b20f2009-11-17 14:39:03 -0800149 if (unlikely(gpio_valid(gpio) < 0)) {
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100150 printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio);
151 dump_stack();
152 return -1;
153 }
154 return 0;
155}
156
157static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
158{
Tony Lindgren92105bb2005-09-07 17:20:26 +0100159 void __iomem *reg = bank->base;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100160 u32 l;
161
162 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800163#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100164 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800165 reg += OMAP_MPUIO_IO_CNTL / bank->stride;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100166 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800167#endif
168#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100169 case METHOD_GPIO_1510:
170 reg += OMAP1510_GPIO_DIR_CONTROL;
171 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800172#endif
173#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100174 case METHOD_GPIO_1610:
175 reg += OMAP1610_GPIO_DIRECTION;
176 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800177#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100178#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100179 case METHOD_GPIO_7XX:
180 reg += OMAP7XX_GPIO_DIR_CONTROL;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700181 break;
182#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800183#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100184 case METHOD_GPIO_24XX:
185 reg += OMAP24XX_GPIO_OE;
186 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800187#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530188#if defined(CONFIG_ARCH_OMAP4)
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800189 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530190 reg += OMAP4_GPIO_OE;
191 break;
192#endif
David Brownelle5c56ed2006-12-06 17:13:59 -0800193 default:
194 WARN_ON(1);
195 return;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100196 }
197 l = __raw_readl(reg);
198 if (is_input)
199 l |= 1 << gpio;
200 else
201 l &= ~(1 << gpio);
202 __raw_writel(l, reg);
203}
204
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100205static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
206{
Tony Lindgren92105bb2005-09-07 17:20:26 +0100207 void __iomem *reg = bank->base;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100208 u32 l = 0;
209
210 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800211#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100212 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800213 reg += OMAP_MPUIO_OUTPUT / bank->stride;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100214 l = __raw_readl(reg);
215 if (enable)
216 l |= 1 << gpio;
217 else
218 l &= ~(1 << gpio);
219 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800220#endif
221#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100222 case METHOD_GPIO_1510:
223 reg += OMAP1510_GPIO_DATA_OUTPUT;
224 l = __raw_readl(reg);
225 if (enable)
226 l |= 1 << gpio;
227 else
228 l &= ~(1 << gpio);
229 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800230#endif
231#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100232 case METHOD_GPIO_1610:
233 if (enable)
234 reg += OMAP1610_GPIO_SET_DATAOUT;
235 else
236 reg += OMAP1610_GPIO_CLEAR_DATAOUT;
237 l = 1 << gpio;
238 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800239#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100240#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100241 case METHOD_GPIO_7XX:
242 reg += OMAP7XX_GPIO_DATA_OUTPUT;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700243 l = __raw_readl(reg);
244 if (enable)
245 l |= 1 << gpio;
246 else
247 l &= ~(1 << gpio);
248 break;
249#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800250#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100251 case METHOD_GPIO_24XX:
252 if (enable)
253 reg += OMAP24XX_GPIO_SETDATAOUT;
254 else
255 reg += OMAP24XX_GPIO_CLEARDATAOUT;
256 l = 1 << gpio;
257 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800258#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530259#ifdef CONFIG_ARCH_OMAP4
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800260 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530261 if (enable)
262 reg += OMAP4_GPIO_SETDATAOUT;
263 else
264 reg += OMAP4_GPIO_CLEARDATAOUT;
265 l = 1 << gpio;
266 break;
267#endif
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100268 default:
David Brownelle5c56ed2006-12-06 17:13:59 -0800269 WARN_ON(1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100270 return;
271 }
272 __raw_writel(l, reg);
273}
274
Roger Quadrosb37c45b2009-08-05 16:53:24 +0300275static int _get_gpio_datain(struct gpio_bank *bank, int gpio)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100276{
Tony Lindgren92105bb2005-09-07 17:20:26 +0100277 void __iomem *reg;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100278
279 if (check_gpio(gpio) < 0)
David Brownelle5c56ed2006-12-06 17:13:59 -0800280 return -EINVAL;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100281 reg = bank->base;
282 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800283#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100284 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800285 reg += OMAP_MPUIO_INPUT_LATCH / bank->stride;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100286 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800287#endif
288#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100289 case METHOD_GPIO_1510:
290 reg += OMAP1510_GPIO_DATA_INPUT;
291 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800292#endif
293#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100294 case METHOD_GPIO_1610:
295 reg += OMAP1610_GPIO_DATAIN;
296 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800297#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100298#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100299 case METHOD_GPIO_7XX:
300 reg += OMAP7XX_GPIO_DATA_INPUT;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700301 break;
302#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800303#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100304 case METHOD_GPIO_24XX:
305 reg += OMAP24XX_GPIO_DATAIN;
306 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800307#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530308#ifdef CONFIG_ARCH_OMAP4
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800309 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530310 reg += OMAP4_GPIO_DATAIN;
311 break;
312#endif
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100313 default:
David Brownelle5c56ed2006-12-06 17:13:59 -0800314 return -EINVAL;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100315 }
Tony Lindgren92105bb2005-09-07 17:20:26 +0100316 return (__raw_readl(reg)
317 & (1 << get_gpio_index(gpio))) != 0;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100318}
319
Roger Quadrosb37c45b2009-08-05 16:53:24 +0300320static int _get_gpio_dataout(struct gpio_bank *bank, int gpio)
321{
322 void __iomem *reg;
323
324 if (check_gpio(gpio) < 0)
325 return -EINVAL;
326 reg = bank->base;
327
328 switch (bank->method) {
329#ifdef CONFIG_ARCH_OMAP1
330 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800331 reg += OMAP_MPUIO_OUTPUT / bank->stride;
Roger Quadrosb37c45b2009-08-05 16:53:24 +0300332 break;
333#endif
334#ifdef CONFIG_ARCH_OMAP15XX
335 case METHOD_GPIO_1510:
336 reg += OMAP1510_GPIO_DATA_OUTPUT;
337 break;
338#endif
339#ifdef CONFIG_ARCH_OMAP16XX
340 case METHOD_GPIO_1610:
341 reg += OMAP1610_GPIO_DATAOUT;
342 break;
343#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100344#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100345 case METHOD_GPIO_7XX:
346 reg += OMAP7XX_GPIO_DATA_OUTPUT;
Roger Quadrosb37c45b2009-08-05 16:53:24 +0300347 break;
348#endif
Charulatha V9f096862010-05-14 12:05:27 -0700349#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Roger Quadrosb37c45b2009-08-05 16:53:24 +0300350 case METHOD_GPIO_24XX:
351 reg += OMAP24XX_GPIO_DATAOUT;
352 break;
353#endif
Charulatha V9f096862010-05-14 12:05:27 -0700354#ifdef CONFIG_ARCH_OMAP4
355 case METHOD_GPIO_44XX:
356 reg += OMAP4_GPIO_DATAOUT;
357 break;
358#endif
Roger Quadrosb37c45b2009-08-05 16:53:24 +0300359 default:
360 return -EINVAL;
361 }
362
363 return (__raw_readl(reg) & (1 << get_gpio_index(gpio))) != 0;
364}
365
Tony Lindgren92105bb2005-09-07 17:20:26 +0100366#define MOD_REG_BIT(reg, bit_mask, set) \
367do { \
368 int l = __raw_readl(base + reg); \
369 if (set) l |= bit_mask; \
370 else l &= ~bit_mask; \
371 __raw_writel(l, base + reg); \
372} while(0)
373
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700374/**
375 * _set_gpio_debounce - low level gpio debounce time
376 * @bank: the gpio bank we're acting upon
377 * @gpio: the gpio number on this @gpio
378 * @debounce: debounce time to use
379 *
380 * OMAP's debounce time is in 31us steps so we need
381 * to convert and round up to the closest unit.
382 */
383static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
384 unsigned debounce)
385{
386 void __iomem *reg = bank->base;
387 u32 val;
388 u32 l;
389
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -0800390 if (!bank->dbck_flag)
391 return;
392
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700393 if (debounce < 32)
394 debounce = 0x01;
395 else if (debounce > 7936)
396 debounce = 0xff;
397 else
398 debounce = (debounce / 0x1f) - 1;
399
400 l = 1 << get_gpio_index(gpio);
401
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -0800402 if (bank->method == METHOD_GPIO_44XX)
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700403 reg += OMAP4_GPIO_DEBOUNCINGTIME;
404 else
405 reg += OMAP24XX_GPIO_DEBOUNCE_VAL;
406
407 __raw_writel(debounce, reg);
408
409 reg = bank->base;
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -0800410 if (bank->method == METHOD_GPIO_44XX)
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700411 reg += OMAP4_GPIO_DEBOUNCENABLE;
412 else
413 reg += OMAP24XX_GPIO_DEBOUNCE_EN;
414
415 val = __raw_readl(reg);
416
417 if (debounce) {
418 val |= l;
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -0800419 clk_enable(bank->dbck);
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700420 } else {
421 val &= ~l;
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -0800422 clk_disable(bank->dbck);
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700423 }
Kevin Hilmanf7ec0b02010-06-09 13:53:07 +0300424 bank->dbck_enable_mask = val;
Felipe Balbi168ef3d2010-05-26 14:42:23 -0700425
426 __raw_writel(val, reg);
427}
428
Tony Lindgren140455f2010-02-12 12:26:48 -0800429#ifdef CONFIG_ARCH_OMAP2PLUS
Kevin Hilman5eb3bb92007-05-05 11:40:29 -0700430static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
431 int trigger)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100432{
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800433 void __iomem *base = bank->base;
Tony Lindgren92105bb2005-09-07 17:20:26 +0100434 u32 gpio_bit = 1 << gpio;
435
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530436 if (cpu_is_omap44xx()) {
437 MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT0, gpio_bit,
438 trigger & IRQ_TYPE_LEVEL_LOW);
439 MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT1, gpio_bit,
440 trigger & IRQ_TYPE_LEVEL_HIGH);
441 MOD_REG_BIT(OMAP4_GPIO_RISINGDETECT, gpio_bit,
442 trigger & IRQ_TYPE_EDGE_RISING);
443 MOD_REG_BIT(OMAP4_GPIO_FALLINGDETECT, gpio_bit,
444 trigger & IRQ_TYPE_EDGE_FALLING);
445 } else {
446 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
447 trigger & IRQ_TYPE_LEVEL_LOW);
448 MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
449 trigger & IRQ_TYPE_LEVEL_HIGH);
450 MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
451 trigger & IRQ_TYPE_EDGE_RISING);
452 MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
453 trigger & IRQ_TYPE_EDGE_FALLING);
454 }
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800455 if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530456 if (cpu_is_omap44xx()) {
Colin Cross0622b252011-06-06 13:38:17 -0700457 MOD_REG_BIT(OMAP4_GPIO_IRQWAKEN0, gpio_bit,
458 trigger != 0);
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530459 } else {
Chunqiu Wang699117a2009-06-24 17:13:39 +0000460 /*
461 * GPIO wakeup request can only be generated on edge
462 * transitions
463 */
464 if (trigger & IRQ_TYPE_EDGE_BOTH)
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530465 __raw_writel(1 << gpio, bank->base
Kevin Hilman5eb3bb92007-05-05 11:40:29 -0700466 + OMAP24XX_GPIO_SETWKUENA);
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530467 else
468 __raw_writel(1 << gpio, bank->base
Kevin Hilman5eb3bb92007-05-05 11:40:29 -0700469 + OMAP24XX_GPIO_CLEARWKUENA);
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530470 }
Tero Kristoa118b5f2008-12-22 14:27:12 +0200471 }
472 /* This part needs to be executed always for OMAP34xx */
473 if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) {
Chunqiu Wang699117a2009-06-24 17:13:39 +0000474 /*
475 * Log the edge gpio and manually trigger the IRQ
476 * after resume if the input level changes
477 * to avoid irq lost during PER RET/OFF mode
478 * Applies for omap2 non-wakeup gpio and all omap3 gpios
479 */
480 if (trigger & IRQ_TYPE_EDGE_BOTH)
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800481 bank->enabled_non_wakeup_gpios |= gpio_bit;
482 else
483 bank->enabled_non_wakeup_gpios &= ~gpio_bit;
484 }
Kevin Hilman5eb3bb92007-05-05 11:40:29 -0700485
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530486 if (cpu_is_omap44xx()) {
487 bank->level_mask =
488 __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT0) |
489 __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT1);
490 } else {
491 bank->level_mask =
492 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0) |
493 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
494 }
Tony Lindgren92105bb2005-09-07 17:20:26 +0100495}
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800496#endif
Tony Lindgren92105bb2005-09-07 17:20:26 +0100497
Uwe Kleine-König9198bcd2010-01-29 14:20:05 -0800498#ifdef CONFIG_ARCH_OMAP1
Cory Maccarrone4318f362010-01-08 10:29:04 -0800499/*
500 * This only applies to chips that can't do both rising and falling edge
501 * detection at once. For all other chips, this function is a noop.
502 */
503static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
504{
505 void __iomem *reg = bank->base;
506 u32 l = 0;
507
508 switch (bank->method) {
Cory Maccarrone4318f362010-01-08 10:29:04 -0800509 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800510 reg += OMAP_MPUIO_GPIO_INT_EDGE / bank->stride;
Cory Maccarrone4318f362010-01-08 10:29:04 -0800511 break;
Cory Maccarrone4318f362010-01-08 10:29:04 -0800512#ifdef CONFIG_ARCH_OMAP15XX
513 case METHOD_GPIO_1510:
514 reg += OMAP1510_GPIO_INT_CONTROL;
515 break;
516#endif
517#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
518 case METHOD_GPIO_7XX:
519 reg += OMAP7XX_GPIO_INT_CONTROL;
520 break;
521#endif
522 default:
523 return;
524 }
525
526 l = __raw_readl(reg);
527 if ((l >> gpio) & 1)
528 l &= ~(1 << gpio);
529 else
530 l |= 1 << gpio;
531
532 __raw_writel(l, reg);
533}
Uwe Kleine-König9198bcd2010-01-29 14:20:05 -0800534#endif
Cory Maccarrone4318f362010-01-08 10:29:04 -0800535
Tony Lindgren92105bb2005-09-07 17:20:26 +0100536static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
537{
538 void __iomem *reg = bank->base;
539 u32 l = 0;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100540
541 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800542#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100543 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800544 reg += OMAP_MPUIO_GPIO_INT_EDGE / bank->stride;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100545 l = __raw_readl(reg);
Janusz Krzysztofik29501572010-04-05 11:38:06 +0000546 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
Cory Maccarrone4318f362010-01-08 10:29:04 -0800547 bank->toggle_mask |= 1 << gpio;
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100548 if (trigger & IRQ_TYPE_EDGE_RISING)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100549 l |= 1 << gpio;
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100550 else if (trigger & IRQ_TYPE_EDGE_FALLING)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100551 l &= ~(1 << gpio);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100552 else
553 goto bad;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100554 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800555#endif
556#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100557 case METHOD_GPIO_1510:
558 reg += OMAP1510_GPIO_INT_CONTROL;
559 l = __raw_readl(reg);
Janusz Krzysztofik29501572010-04-05 11:38:06 +0000560 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
Cory Maccarrone4318f362010-01-08 10:29:04 -0800561 bank->toggle_mask |= 1 << gpio;
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100562 if (trigger & IRQ_TYPE_EDGE_RISING)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100563 l |= 1 << gpio;
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100564 else if (trigger & IRQ_TYPE_EDGE_FALLING)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100565 l &= ~(1 << gpio);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100566 else
567 goto bad;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100568 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800569#endif
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800570#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100571 case METHOD_GPIO_1610:
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100572 if (gpio & 0x08)
573 reg += OMAP1610_GPIO_EDGE_CTRL2;
574 else
575 reg += OMAP1610_GPIO_EDGE_CTRL1;
576 gpio &= 0x07;
577 l = __raw_readl(reg);
578 l &= ~(3 << (gpio << 1));
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100579 if (trigger & IRQ_TYPE_EDGE_RISING)
Tony Lindgren6e60e792006-04-02 17:46:23 +0100580 l |= 2 << (gpio << 1);
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100581 if (trigger & IRQ_TYPE_EDGE_FALLING)
Tony Lindgren6e60e792006-04-02 17:46:23 +0100582 l |= 1 << (gpio << 1);
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800583 if (trigger)
584 /* Enable wake-up during idle for dynamic tick */
585 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_SET_WAKEUPENA);
586 else
587 __raw_writel(1 << gpio, bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100588 break;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800589#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100590#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100591 case METHOD_GPIO_7XX:
592 reg += OMAP7XX_GPIO_INT_CONTROL;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700593 l = __raw_readl(reg);
Janusz Krzysztofik29501572010-04-05 11:38:06 +0000594 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
Cory Maccarrone4318f362010-01-08 10:29:04 -0800595 bank->toggle_mask |= 1 << gpio;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700596 if (trigger & IRQ_TYPE_EDGE_RISING)
597 l |= 1 << gpio;
598 else if (trigger & IRQ_TYPE_EDGE_FALLING)
599 l &= ~(1 << gpio);
600 else
601 goto bad;
602 break;
603#endif
Tony Lindgren140455f2010-02-12 12:26:48 -0800604#ifdef CONFIG_ARCH_OMAP2PLUS
Tony Lindgren92105bb2005-09-07 17:20:26 +0100605 case METHOD_GPIO_24XX:
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800606 case METHOD_GPIO_44XX:
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800607 set_24xx_gpio_triggering(bank, gpio, trigger);
Mika Westerbergf7c5cc42010-12-29 13:01:31 +0200608 return 0;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800609#endif
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100610 default:
Tony Lindgren92105bb2005-09-07 17:20:26 +0100611 goto bad;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100612 }
Tony Lindgren92105bb2005-09-07 17:20:26 +0100613 __raw_writel(l, reg);
614 return 0;
615bad:
616 return -EINVAL;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100617}
618
Lennert Buytenheke9191022010-11-29 11:17:17 +0100619static int gpio_irq_type(struct irq_data *d, unsigned type)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100620{
621 struct gpio_bank *bank;
Tony Lindgren92105bb2005-09-07 17:20:26 +0100622 unsigned gpio;
623 int retval;
David Brownella6472532008-03-03 04:33:30 -0800624 unsigned long flags;
Tony Lindgren92105bb2005-09-07 17:20:26 +0100625
Lennert Buytenheke9191022010-11-29 11:17:17 +0100626 if (!cpu_class_is_omap2() && d->irq > IH_MPUIO_BASE)
627 gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100628 else
Lennert Buytenheke9191022010-11-29 11:17:17 +0100629 gpio = d->irq - IH_GPIO_BASE;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100630
631 if (check_gpio(gpio) < 0)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100632 return -EINVAL;
633
David Brownelle5c56ed2006-12-06 17:13:59 -0800634 if (type & ~IRQ_TYPE_SENSE_MASK)
Tony Lindgren6e60e792006-04-02 17:46:23 +0100635 return -EINVAL;
David Brownelle5c56ed2006-12-06 17:13:59 -0800636
637 /* OMAP1 allows only only edge triggering */
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -0800638 if (!cpu_class_is_omap2()
David Brownelle5c56ed2006-12-06 17:13:59 -0800639 && (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
Tony Lindgren92105bb2005-09-07 17:20:26 +0100640 return -EINVAL;
641
Lennert Buytenheke9191022010-11-29 11:17:17 +0100642 bank = irq_data_get_irq_chip_data(d);
David Brownella6472532008-03-03 04:33:30 -0800643 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100644 retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
David Brownella6472532008-03-03 04:33:30 -0800645 spin_unlock_irqrestore(&bank->lock, flags);
Kevin Hilman672e3022008-01-16 21:56:16 -0800646
647 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
Thomas Gleixner6845664a2011-03-24 13:25:22 +0100648 __irq_set_handler_locked(d->irq, handle_level_irq);
Kevin Hilman672e3022008-01-16 21:56:16 -0800649 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
Thomas Gleixner6845664a2011-03-24 13:25:22 +0100650 __irq_set_handler_locked(d->irq, handle_edge_irq);
Kevin Hilman672e3022008-01-16 21:56:16 -0800651
Tony Lindgren92105bb2005-09-07 17:20:26 +0100652 return retval;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100653}
654
655static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
656{
Tony Lindgren92105bb2005-09-07 17:20:26 +0100657 void __iomem *reg = bank->base;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100658
659 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800660#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100661 case METHOD_MPUIO:
662 /* MPUIO irqstatus is reset by reading the status register,
663 * so do nothing here */
664 return;
David Brownelle5c56ed2006-12-06 17:13:59 -0800665#endif
666#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100667 case METHOD_GPIO_1510:
668 reg += OMAP1510_GPIO_INT_STATUS;
669 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800670#endif
671#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100672 case METHOD_GPIO_1610:
673 reg += OMAP1610_GPIO_IRQSTATUS1;
674 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800675#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100676#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100677 case METHOD_GPIO_7XX:
678 reg += OMAP7XX_GPIO_INT_STATUS;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700679 break;
680#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800681#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100682 case METHOD_GPIO_24XX:
683 reg += OMAP24XX_GPIO_IRQSTATUS1;
684 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800685#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530686#if defined(CONFIG_ARCH_OMAP4)
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800687 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530688 reg += OMAP4_GPIO_IRQSTATUS0;
689 break;
690#endif
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100691 default:
David Brownelle5c56ed2006-12-06 17:13:59 -0800692 WARN_ON(1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100693 return;
694 }
695 __raw_writel(gpio_mask, reg);
Hiroshi DOYUbee79302006-09-25 12:41:46 +0300696
697 /* Workaround for clearing DSP GPIO interrupts to allow retention */
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800698 if (cpu_is_omap24xx() || cpu_is_omap34xx())
699 reg = bank->base + OMAP24XX_GPIO_IRQSTATUS2;
700 else if (cpu_is_omap44xx())
701 reg = bank->base + OMAP4_GPIO_IRQSTATUS1;
702
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530703 if (cpu_is_omap24xx() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
Roger Quadrosbedfd152009-04-23 11:10:50 -0700704 __raw_writel(gpio_mask, reg);
705
706 /* Flush posted write for the irq status to avoid spurious interrupts */
707 __raw_readl(reg);
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530708 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100709}
710
711static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
712{
713 _clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio));
714}
715
Imre Deakea6dedd2006-06-26 16:16:00 -0700716static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
717{
718 void __iomem *reg = bank->base;
Imre Deak99c47702006-06-26 16:16:07 -0700719 int inv = 0;
720 u32 l;
721 u32 mask;
Imre Deakea6dedd2006-06-26 16:16:00 -0700722
723 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800724#ifdef CONFIG_ARCH_OMAP1
Imre Deakea6dedd2006-06-26 16:16:00 -0700725 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800726 reg += OMAP_MPUIO_GPIO_MASKIT / bank->stride;
Imre Deak99c47702006-06-26 16:16:07 -0700727 mask = 0xffff;
728 inv = 1;
Imre Deakea6dedd2006-06-26 16:16:00 -0700729 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800730#endif
731#ifdef CONFIG_ARCH_OMAP15XX
Imre Deakea6dedd2006-06-26 16:16:00 -0700732 case METHOD_GPIO_1510:
733 reg += OMAP1510_GPIO_INT_MASK;
Imre Deak99c47702006-06-26 16:16:07 -0700734 mask = 0xffff;
735 inv = 1;
Imre Deakea6dedd2006-06-26 16:16:00 -0700736 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800737#endif
738#ifdef CONFIG_ARCH_OMAP16XX
Imre Deakea6dedd2006-06-26 16:16:00 -0700739 case METHOD_GPIO_1610:
740 reg += OMAP1610_GPIO_IRQENABLE1;
Imre Deak99c47702006-06-26 16:16:07 -0700741 mask = 0xffff;
Imre Deakea6dedd2006-06-26 16:16:00 -0700742 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800743#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100744#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100745 case METHOD_GPIO_7XX:
746 reg += OMAP7XX_GPIO_INT_MASK;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700747 mask = 0xffffffff;
748 inv = 1;
749 break;
750#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800751#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Imre Deakea6dedd2006-06-26 16:16:00 -0700752 case METHOD_GPIO_24XX:
753 reg += OMAP24XX_GPIO_IRQENABLE1;
Imre Deak99c47702006-06-26 16:16:07 -0700754 mask = 0xffffffff;
Imre Deakea6dedd2006-06-26 16:16:00 -0700755 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800756#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530757#if defined(CONFIG_ARCH_OMAP4)
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800758 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530759 reg += OMAP4_GPIO_IRQSTATUSSET0;
760 mask = 0xffffffff;
761 break;
762#endif
Imre Deakea6dedd2006-06-26 16:16:00 -0700763 default:
David Brownelle5c56ed2006-12-06 17:13:59 -0800764 WARN_ON(1);
Imre Deakea6dedd2006-06-26 16:16:00 -0700765 return 0;
766 }
767
Imre Deak99c47702006-06-26 16:16:07 -0700768 l = __raw_readl(reg);
769 if (inv)
770 l = ~l;
771 l &= mask;
772 return l;
Imre Deakea6dedd2006-06-26 16:16:00 -0700773}
774
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100775static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable)
776{
Tony Lindgren92105bb2005-09-07 17:20:26 +0100777 void __iomem *reg = bank->base;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100778 u32 l;
779
780 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -0800781#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100782 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -0800783 reg += OMAP_MPUIO_GPIO_MASKIT / bank->stride;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100784 l = __raw_readl(reg);
785 if (enable)
786 l &= ~(gpio_mask);
787 else
788 l |= gpio_mask;
789 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800790#endif
791#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100792 case METHOD_GPIO_1510:
793 reg += OMAP1510_GPIO_INT_MASK;
794 l = __raw_readl(reg);
795 if (enable)
796 l &= ~(gpio_mask);
797 else
798 l |= gpio_mask;
799 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800800#endif
801#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100802 case METHOD_GPIO_1610:
803 if (enable)
804 reg += OMAP1610_GPIO_SET_IRQENABLE1;
805 else
806 reg += OMAP1610_GPIO_CLEAR_IRQENABLE1;
807 l = gpio_mask;
808 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800809#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +0100810#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +0100811 case METHOD_GPIO_7XX:
812 reg += OMAP7XX_GPIO_INT_MASK;
Zebediah C. McClure56739a62009-03-23 18:07:40 -0700813 l = __raw_readl(reg);
814 if (enable)
815 l &= ~(gpio_mask);
816 else
817 l |= gpio_mask;
818 break;
819#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800820#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100821 case METHOD_GPIO_24XX:
822 if (enable)
823 reg += OMAP24XX_GPIO_SETIRQENABLE1;
824 else
825 reg += OMAP24XX_GPIO_CLEARIRQENABLE1;
826 l = gpio_mask;
827 break;
David Brownelle5c56ed2006-12-06 17:13:59 -0800828#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530829#ifdef CONFIG_ARCH_OMAP4
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800830 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +0530831 if (enable)
832 reg += OMAP4_GPIO_IRQSTATUSSET0;
833 else
834 reg += OMAP4_GPIO_IRQSTATUSCLR0;
835 l = gpio_mask;
836 break;
837#endif
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100838 default:
David Brownelle5c56ed2006-12-06 17:13:59 -0800839 WARN_ON(1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100840 return;
841 }
842 __raw_writel(l, reg);
843}
844
845static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
846{
847 _enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable);
848}
849
Tony Lindgren92105bb2005-09-07 17:20:26 +0100850/*
851 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
852 * 1510 does not seem to have a wake-up register. If JTAG is connected
853 * to the target, system will wake up always on GPIO events. While
854 * system is running all registered GPIO interrupts need to have wake-up
855 * enabled. When system is suspended, only selected GPIO interrupts need
856 * to have wake-up enabled.
857 */
858static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
859{
Tony Lindgren4cc64202010-01-08 10:29:05 -0800860 unsigned long uninitialized_var(flags);
David Brownella6472532008-03-03 04:33:30 -0800861
Tony Lindgren92105bb2005-09-07 17:20:26 +0100862 switch (bank->method) {
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800863#ifdef CONFIG_ARCH_OMAP16XX
David Brownell11a78b72006-12-06 17:14:11 -0800864 case METHOD_MPUIO:
Tony Lindgren92105bb2005-09-07 17:20:26 +0100865 case METHOD_GPIO_1610:
David Brownella6472532008-03-03 04:33:30 -0800866 spin_lock_irqsave(&bank->lock, flags);
Kevin Hilmanb3bb4f62009-04-23 11:10:49 -0700867 if (enable)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100868 bank->suspend_wakeup |= (1 << gpio);
Kevin Hilmanb3bb4f62009-04-23 11:10:49 -0700869 else
Tony Lindgren92105bb2005-09-07 17:20:26 +0100870 bank->suspend_wakeup &= ~(1 << gpio);
David Brownella6472532008-03-03 04:33:30 -0800871 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100872 return 0;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800873#endif
Tony Lindgren140455f2010-02-12 12:26:48 -0800874#ifdef CONFIG_ARCH_OMAP2PLUS
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800875 case METHOD_GPIO_24XX:
Tony Lindgren3f1686a2010-02-15 09:27:25 -0800876 case METHOD_GPIO_44XX:
David Brownell11a78b72006-12-06 17:14:11 -0800877 if (bank->non_wakeup_gpios & (1 << gpio)) {
878 printk(KERN_ERR "Unable to modify wakeup on "
879 "non-wakeup GPIO%d\n",
880 (bank - gpio_bank) * 32 + gpio);
881 return -EINVAL;
882 }
David Brownella6472532008-03-03 04:33:30 -0800883 spin_lock_irqsave(&bank->lock, flags);
Kevin Hilmanb3bb4f62009-04-23 11:10:49 -0700884 if (enable)
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800885 bank->suspend_wakeup |= (1 << gpio);
Kevin Hilmanb3bb4f62009-04-23 11:10:49 -0700886 else
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800887 bank->suspend_wakeup &= ~(1 << gpio);
David Brownella6472532008-03-03 04:33:30 -0800888 spin_unlock_irqrestore(&bank->lock, flags);
Juha Yrjola3ac4fa92006-12-06 17:13:52 -0800889 return 0;
890#endif
Tony Lindgren92105bb2005-09-07 17:20:26 +0100891 default:
892 printk(KERN_ERR "Can't enable GPIO wakeup for method %i\n",
893 bank->method);
894 return -EINVAL;
895 }
896}
897
Tony Lindgren4196dd62006-09-25 12:41:38 +0300898static void _reset_gpio(struct gpio_bank *bank, int gpio)
899{
900 _set_gpio_direction(bank, get_gpio_index(gpio), 1);
901 _set_gpio_irqenable(bank, gpio, 0);
902 _clear_gpio_irqstatus(bank, gpio);
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +0100903 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
Tony Lindgren4196dd62006-09-25 12:41:38 +0300904}
905
Tony Lindgren92105bb2005-09-07 17:20:26 +0100906/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
Lennert Buytenheke9191022010-11-29 11:17:17 +0100907static int gpio_wake_enable(struct irq_data *d, unsigned int enable)
Tony Lindgren92105bb2005-09-07 17:20:26 +0100908{
Lennert Buytenheke9191022010-11-29 11:17:17 +0100909 unsigned int gpio = d->irq - IH_GPIO_BASE;
Tony Lindgren92105bb2005-09-07 17:20:26 +0100910 struct gpio_bank *bank;
911 int retval;
912
913 if (check_gpio(gpio) < 0)
914 return -ENODEV;
Lennert Buytenheke9191022010-11-29 11:17:17 +0100915 bank = irq_data_get_irq_chip_data(d);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100916 retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100917
918 return retval;
919}
920
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800921static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100922{
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800923 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
David Brownella6472532008-03-03 04:33:30 -0800924 unsigned long flags;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100925
David Brownella6472532008-03-03 04:33:30 -0800926 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100927
Tony Lindgren4196dd62006-09-25 12:41:38 +0300928 /* Set trigger to none. You need to enable the desired trigger with
929 * request_irq() or set_irq_type().
930 */
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800931 _set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100932
Tony Lindgren1a8bfa12005-11-10 14:26:50 +0000933#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100934 if (bank->method == METHOD_GPIO_1510) {
Tony Lindgren92105bb2005-09-07 17:20:26 +0100935 void __iomem *reg;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100936
Tony Lindgren92105bb2005-09-07 17:20:26 +0100937 /* Claim the pin for MPU */
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100938 reg = bank->base + OMAP1510_GPIO_PIN_CONTROL;
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800939 __raw_writel(__raw_readl(reg) | (1 << offset), reg);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100940 }
941#endif
Charulatha V058af1e2009-11-22 10:11:25 -0800942 if (!cpu_class_is_omap1()) {
943 if (!bank->mod_usage) {
Charulatha V9f096862010-05-14 12:05:27 -0700944 void __iomem *reg = bank->base;
Charulatha V058af1e2009-11-22 10:11:25 -0800945 u32 ctrl;
Charulatha V9f096862010-05-14 12:05:27 -0700946
947 if (cpu_is_omap24xx() || cpu_is_omap34xx())
948 reg += OMAP24XX_GPIO_CTRL;
949 else if (cpu_is_omap44xx())
950 reg += OMAP4_GPIO_CTRL;
951 ctrl = __raw_readl(reg);
Charulatha V058af1e2009-11-22 10:11:25 -0800952 /* Module is enabled, clocks are not gated */
Charulatha V9f096862010-05-14 12:05:27 -0700953 ctrl &= 0xFFFFFFFE;
954 __raw_writel(ctrl, reg);
Charulatha V058af1e2009-11-22 10:11:25 -0800955 }
956 bank->mod_usage |= 1 << offset;
957 }
David Brownella6472532008-03-03 04:33:30 -0800958 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100959
960 return 0;
961}
962
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800963static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100964{
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800965 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
David Brownella6472532008-03-03 04:33:30 -0800966 unsigned long flags;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100967
David Brownella6472532008-03-03 04:33:30 -0800968 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100969#ifdef CONFIG_ARCH_OMAP16XX
970 if (bank->method == METHOD_GPIO_1610) {
971 /* Disable wake-up during idle for dynamic tick */
972 void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800973 __raw_writel(1 << offset, reg);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100974 }
975#endif
Charulatha V9f096862010-05-14 12:05:27 -0700976#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
977 if (bank->method == METHOD_GPIO_24XX) {
Tony Lindgren92105bb2005-09-07 17:20:26 +0100978 /* Disable wake-up during idle for dynamic tick */
979 void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
Jarkko Nikula3ff164e2008-12-10 17:35:27 -0800980 __raw_writel(1 << offset, reg);
Tony Lindgren92105bb2005-09-07 17:20:26 +0100981 }
982#endif
Charulatha V9f096862010-05-14 12:05:27 -0700983#ifdef CONFIG_ARCH_OMAP4
984 if (bank->method == METHOD_GPIO_44XX) {
985 /* Disable wake-up during idle for dynamic tick */
986 void __iomem *reg = bank->base + OMAP4_GPIO_IRQWAKEN0;
987 __raw_writel(1 << offset, reg);
988 }
989#endif
Charulatha V058af1e2009-11-22 10:11:25 -0800990 if (!cpu_class_is_omap1()) {
991 bank->mod_usage &= ~(1 << offset);
992 if (!bank->mod_usage) {
Charulatha V9f096862010-05-14 12:05:27 -0700993 void __iomem *reg = bank->base;
Charulatha V058af1e2009-11-22 10:11:25 -0800994 u32 ctrl;
Charulatha V9f096862010-05-14 12:05:27 -0700995
996 if (cpu_is_omap24xx() || cpu_is_omap34xx())
997 reg += OMAP24XX_GPIO_CTRL;
998 else if (cpu_is_omap44xx())
999 reg += OMAP4_GPIO_CTRL;
1000 ctrl = __raw_readl(reg);
Charulatha V058af1e2009-11-22 10:11:25 -08001001 /* Module is disabled, clocks are gated */
1002 ctrl |= 1;
Charulatha V9f096862010-05-14 12:05:27 -07001003 __raw_writel(ctrl, reg);
Charulatha V058af1e2009-11-22 10:11:25 -08001004 }
1005 }
Jarkko Nikula3ff164e2008-12-10 17:35:27 -08001006 _reset_gpio(bank, bank->chip.base + offset);
David Brownella6472532008-03-03 04:33:30 -08001007 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001008}
1009
1010/*
1011 * We need to unmask the GPIO bank interrupt as soon as possible to
1012 * avoid missing GPIO interrupts for other lines in the bank.
1013 * Then we need to mask-read-clear-unmask the triggered GPIO lines
1014 * in the bank to avoid missing nested interrupts for a GPIO line.
1015 * If we wait to unmask individual GPIO lines in the bank after the
1016 * line's interrupt handler has been run, we may miss some nested
1017 * interrupts.
1018 */
Russell King10dd5ce2006-11-23 11:41:32 +00001019static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001020{
Tony Lindgren92105bb2005-09-07 17:20:26 +01001021 void __iomem *isr_reg = NULL;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001022 u32 isr;
Cory Maccarrone4318f362010-01-08 10:29:04 -08001023 unsigned int gpio_irq, gpio_index;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001024 struct gpio_bank *bank;
Imre Deakea6dedd2006-06-26 16:16:00 -07001025 u32 retrigger = 0;
1026 int unmasked = 0;
Will Deaconee144182011-02-21 13:46:08 +00001027 struct irq_chip *chip = irq_desc_get_chip(desc);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001028
Will Deaconee144182011-02-21 13:46:08 +00001029 chained_irq_enter(chip, desc);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001030
Thomas Gleixner6845664a2011-03-24 13:25:22 +01001031 bank = irq_get_handler_data(irq);
David Brownelle5c56ed2006-12-06 17:13:59 -08001032#ifdef CONFIG_ARCH_OMAP1
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001033 if (bank->method == METHOD_MPUIO)
Tony Lindgren5de62b82010-12-07 16:26:58 -08001034 isr_reg = bank->base +
1035 OMAP_MPUIO_GPIO_INT / bank->stride;
David Brownelle5c56ed2006-12-06 17:13:59 -08001036#endif
Tony Lindgren1a8bfa12005-11-10 14:26:50 +00001037#ifdef CONFIG_ARCH_OMAP15XX
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001038 if (bank->method == METHOD_GPIO_1510)
1039 isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS;
1040#endif
1041#if defined(CONFIG_ARCH_OMAP16XX)
1042 if (bank->method == METHOD_GPIO_1610)
1043 isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1;
1044#endif
Alistair Buxtonb718aa82009-09-23 18:56:19 +01001045#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
Alistair Buxton7c006922009-09-22 10:02:58 +01001046 if (bank->method == METHOD_GPIO_7XX)
1047 isr_reg = bank->base + OMAP7XX_GPIO_INT_STATUS;
Zebediah C. McClure56739a62009-03-23 18:07:40 -07001048#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -08001049#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +01001050 if (bank->method == METHOD_GPIO_24XX)
1051 isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
1052#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301053#if defined(CONFIG_ARCH_OMAP4)
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001054 if (bank->method == METHOD_GPIO_44XX)
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301055 isr_reg = bank->base + OMAP4_GPIO_IRQSTATUS0;
1056#endif
Evgeny Kuznetsovb1cc4c52010-12-07 16:25:40 -08001057
1058 if (WARN_ON(!isr_reg))
1059 goto exit;
1060
Tony Lindgren92105bb2005-09-07 17:20:26 +01001061 while(1) {
Tony Lindgren6e60e792006-04-02 17:46:23 +01001062 u32 isr_saved, level_mask = 0;
Imre Deakea6dedd2006-06-26 16:16:00 -07001063 u32 enabled;
Tony Lindgren6e60e792006-04-02 17:46:23 +01001064
Imre Deakea6dedd2006-06-26 16:16:00 -07001065 enabled = _get_gpio_irqbank_mask(bank);
1066 isr_saved = isr = __raw_readl(isr_reg) & enabled;
Tony Lindgren6e60e792006-04-02 17:46:23 +01001067
1068 if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
1069 isr &= 0x0000ffff;
1070
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -08001071 if (cpu_class_is_omap2()) {
Kevin Hilmanb144ff62008-01-16 21:56:15 -08001072 level_mask = bank->level_mask & enabled;
Imre Deakea6dedd2006-06-26 16:16:00 -07001073 }
Tony Lindgren6e60e792006-04-02 17:46:23 +01001074
1075 /* clear edge sensitive interrupts before handler(s) are
1076 called so that we don't miss any interrupt occurred while
1077 executing them */
1078 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 0);
1079 _clear_gpio_irqbank(bank, isr_saved & ~level_mask);
1080 _enable_gpio_irqbank(bank, isr_saved & ~level_mask, 1);
1081
1082 /* if there is only edge sensitive GPIO pin interrupts
1083 configured, we could unmask GPIO bank interrupt immediately */
Imre Deakea6dedd2006-06-26 16:16:00 -07001084 if (!level_mask && !unmasked) {
1085 unmasked = 1;
Will Deaconee144182011-02-21 13:46:08 +00001086 chained_irq_exit(chip, desc);
Imre Deakea6dedd2006-06-26 16:16:00 -07001087 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001088
Imre Deakea6dedd2006-06-26 16:16:00 -07001089 isr |= retrigger;
1090 retrigger = 0;
Tony Lindgren92105bb2005-09-07 17:20:26 +01001091 if (!isr)
1092 break;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001093
Tony Lindgren92105bb2005-09-07 17:20:26 +01001094 gpio_irq = bank->virtual_irq_start;
1095 for (; isr != 0; isr >>= 1, gpio_irq++) {
Cory Maccarrone4318f362010-01-08 10:29:04 -08001096 gpio_index = get_gpio_index(irq_to_gpio(gpio_irq));
1097
Tony Lindgren92105bb2005-09-07 17:20:26 +01001098 if (!(isr & 1))
1099 continue;
Thomas Gleixner29454dd2006-07-03 02:22:22 +02001100
Cory Maccarrone4318f362010-01-08 10:29:04 -08001101#ifdef CONFIG_ARCH_OMAP1
1102 /*
1103 * Some chips can't respond to both rising and falling
1104 * at the same time. If this irq was requested with
1105 * both flags, we need to flip the ICR data for the IRQ
1106 * to respond to the IRQ for the opposite direction.
1107 * This will be indicated in the bank toggle_mask.
1108 */
1109 if (bank->toggle_mask & (1 << gpio_index))
1110 _toggle_gpio_edge_triggering(bank, gpio_index);
1111#endif
1112
Dmitry Baryshkovd8aa0252008-10-09 13:36:24 +01001113 generic_handle_irq(gpio_irq);
Tony Lindgren92105bb2005-09-07 17:20:26 +01001114 }
Tony Lindgren1a8bfa12005-11-10 14:26:50 +00001115 }
Imre Deakea6dedd2006-06-26 16:16:00 -07001116 /* if bank has any level sensitive GPIO pin interrupt
1117 configured, we must unmask the bank interrupt only after
1118 handler(s) are executed in order to avoid spurious bank
1119 interrupt */
Evgeny Kuznetsovb1cc4c52010-12-07 16:25:40 -08001120exit:
Imre Deakea6dedd2006-06-26 16:16:00 -07001121 if (!unmasked)
Will Deaconee144182011-02-21 13:46:08 +00001122 chained_irq_exit(chip, desc);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001123}
1124
Lennert Buytenheke9191022010-11-29 11:17:17 +01001125static void gpio_irq_shutdown(struct irq_data *d)
Tony Lindgren4196dd62006-09-25 12:41:38 +03001126{
Lennert Buytenheke9191022010-11-29 11:17:17 +01001127 unsigned int gpio = d->irq - IH_GPIO_BASE;
1128 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
Colin Cross85ec7b92011-06-06 13:38:18 -07001129 unsigned long flags;
Tony Lindgren4196dd62006-09-25 12:41:38 +03001130
Colin Cross85ec7b92011-06-06 13:38:18 -07001131 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren4196dd62006-09-25 12:41:38 +03001132 _reset_gpio(bank, gpio);
Colin Cross85ec7b92011-06-06 13:38:18 -07001133 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren4196dd62006-09-25 12:41:38 +03001134}
1135
Lennert Buytenheke9191022010-11-29 11:17:17 +01001136static void gpio_ack_irq(struct irq_data *d)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001137{
Lennert Buytenheke9191022010-11-29 11:17:17 +01001138 unsigned int gpio = d->irq - IH_GPIO_BASE;
1139 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001140
1141 _clear_gpio_irqstatus(bank, gpio);
1142}
1143
Lennert Buytenheke9191022010-11-29 11:17:17 +01001144static void gpio_mask_irq(struct irq_data *d)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001145{
Lennert Buytenheke9191022010-11-29 11:17:17 +01001146 unsigned int gpio = d->irq - IH_GPIO_BASE;
1147 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
Colin Cross85ec7b92011-06-06 13:38:18 -07001148 unsigned long flags;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001149
Colin Cross85ec7b92011-06-06 13:38:18 -07001150 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001151 _set_gpio_irqenable(bank, gpio, 0);
Kevin Hilman55b60192009-06-04 15:57:10 -07001152 _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
Colin Cross85ec7b92011-06-06 13:38:18 -07001153 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001154}
1155
Lennert Buytenheke9191022010-11-29 11:17:17 +01001156static void gpio_unmask_irq(struct irq_data *d)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001157{
Lennert Buytenheke9191022010-11-29 11:17:17 +01001158 unsigned int gpio = d->irq - IH_GPIO_BASE;
1159 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
Kevin Hilmanb144ff62008-01-16 21:56:15 -08001160 unsigned int irq_mask = 1 << get_gpio_index(gpio);
Thomas Gleixner8c04a172011-03-24 12:40:15 +01001161 u32 trigger = irqd_get_trigger_type(d);
Colin Cross85ec7b92011-06-06 13:38:18 -07001162 unsigned long flags;
Kevin Hilman55b60192009-06-04 15:57:10 -07001163
Colin Cross85ec7b92011-06-06 13:38:18 -07001164 spin_lock_irqsave(&bank->lock, flags);
Kevin Hilman55b60192009-06-04 15:57:10 -07001165 if (trigger)
1166 _set_gpio_triggering(bank, get_gpio_index(gpio), trigger);
Kevin Hilmanb144ff62008-01-16 21:56:15 -08001167
1168 /* For level-triggered GPIOs, the clearing must be done after
1169 * the HW source is cleared, thus after the handler has run */
1170 if (bank->level_mask & irq_mask) {
1171 _set_gpio_irqenable(bank, gpio, 0);
1172 _clear_gpio_irqstatus(bank, gpio);
1173 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001174
Kevin Hilman4de8c752008-01-16 21:56:14 -08001175 _set_gpio_irqenable(bank, gpio, 1);
Colin Cross85ec7b92011-06-06 13:38:18 -07001176 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001177}
1178
David Brownelle5c56ed2006-12-06 17:13:59 -08001179static struct irq_chip gpio_irq_chip = {
1180 .name = "GPIO",
Lennert Buytenheke9191022010-11-29 11:17:17 +01001181 .irq_shutdown = gpio_irq_shutdown,
1182 .irq_ack = gpio_ack_irq,
1183 .irq_mask = gpio_mask_irq,
1184 .irq_unmask = gpio_unmask_irq,
1185 .irq_set_type = gpio_irq_type,
1186 .irq_set_wake = gpio_wake_enable,
David Brownelle5c56ed2006-12-06 17:13:59 -08001187};
1188
1189/*---------------------------------------------------------------------*/
1190
1191#ifdef CONFIG_ARCH_OMAP1
1192
1193/* MPUIO uses the always-on 32k clock */
1194
Lennert Buytenheke9191022010-11-29 11:17:17 +01001195static void mpuio_ack_irq(struct irq_data *d)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001196{
1197 /* The ISR is reset automatically, so do nothing here. */
1198}
1199
Lennert Buytenheke9191022010-11-29 11:17:17 +01001200static void mpuio_mask_irq(struct irq_data *d)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001201{
Lennert Buytenheke9191022010-11-29 11:17:17 +01001202 unsigned int gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
1203 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001204
1205 _set_gpio_irqenable(bank, gpio, 0);
1206}
1207
Lennert Buytenheke9191022010-11-29 11:17:17 +01001208static void mpuio_unmask_irq(struct irq_data *d)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001209{
Lennert Buytenheke9191022010-11-29 11:17:17 +01001210 unsigned int gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
1211 struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001212
1213 _set_gpio_irqenable(bank, gpio, 1);
1214}
1215
David Brownelle5c56ed2006-12-06 17:13:59 -08001216static struct irq_chip mpuio_irq_chip = {
1217 .name = "MPUIO",
Lennert Buytenheke9191022010-11-29 11:17:17 +01001218 .irq_ack = mpuio_ack_irq,
1219 .irq_mask = mpuio_mask_irq,
1220 .irq_unmask = mpuio_unmask_irq,
1221 .irq_set_type = gpio_irq_type,
David Brownell11a78b72006-12-06 17:14:11 -08001222#ifdef CONFIG_ARCH_OMAP16XX
1223 /* REVISIT: assuming only 16xx supports MPUIO wake events */
Lennert Buytenheke9191022010-11-29 11:17:17 +01001224 .irq_set_wake = gpio_wake_enable,
David Brownell11a78b72006-12-06 17:14:11 -08001225#endif
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001226};
1227
David Brownelle5c56ed2006-12-06 17:13:59 -08001228
1229#define bank_is_mpuio(bank) ((bank)->method == METHOD_MPUIO)
1230
David Brownell11a78b72006-12-06 17:14:11 -08001231
1232#ifdef CONFIG_ARCH_OMAP16XX
1233
1234#include <linux/platform_device.h>
1235
Magnus Damm79ee0312009-07-08 13:22:04 +02001236static int omap_mpuio_suspend_noirq(struct device *dev)
David Brownell11a78b72006-12-06 17:14:11 -08001237{
Magnus Damm79ee0312009-07-08 13:22:04 +02001238 struct platform_device *pdev = to_platform_device(dev);
David Brownell11a78b72006-12-06 17:14:11 -08001239 struct gpio_bank *bank = platform_get_drvdata(pdev);
Tony Lindgren5de62b82010-12-07 16:26:58 -08001240 void __iomem *mask_reg = bank->base +
1241 OMAP_MPUIO_GPIO_MASKIT / bank->stride;
David Brownella6472532008-03-03 04:33:30 -08001242 unsigned long flags;
David Brownell11a78b72006-12-06 17:14:11 -08001243
David Brownella6472532008-03-03 04:33:30 -08001244 spin_lock_irqsave(&bank->lock, flags);
David Brownell11a78b72006-12-06 17:14:11 -08001245 bank->saved_wakeup = __raw_readl(mask_reg);
1246 __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
David Brownella6472532008-03-03 04:33:30 -08001247 spin_unlock_irqrestore(&bank->lock, flags);
David Brownell11a78b72006-12-06 17:14:11 -08001248
1249 return 0;
1250}
1251
Magnus Damm79ee0312009-07-08 13:22:04 +02001252static int omap_mpuio_resume_noirq(struct device *dev)
David Brownell11a78b72006-12-06 17:14:11 -08001253{
Magnus Damm79ee0312009-07-08 13:22:04 +02001254 struct platform_device *pdev = to_platform_device(dev);
David Brownell11a78b72006-12-06 17:14:11 -08001255 struct gpio_bank *bank = platform_get_drvdata(pdev);
Tony Lindgren5de62b82010-12-07 16:26:58 -08001256 void __iomem *mask_reg = bank->base +
1257 OMAP_MPUIO_GPIO_MASKIT / bank->stride;
David Brownella6472532008-03-03 04:33:30 -08001258 unsigned long flags;
David Brownell11a78b72006-12-06 17:14:11 -08001259
David Brownella6472532008-03-03 04:33:30 -08001260 spin_lock_irqsave(&bank->lock, flags);
David Brownell11a78b72006-12-06 17:14:11 -08001261 __raw_writel(bank->saved_wakeup, mask_reg);
David Brownella6472532008-03-03 04:33:30 -08001262 spin_unlock_irqrestore(&bank->lock, flags);
David Brownell11a78b72006-12-06 17:14:11 -08001263
1264 return 0;
1265}
1266
Alexey Dobriyan47145212009-12-14 18:00:08 -08001267static const struct dev_pm_ops omap_mpuio_dev_pm_ops = {
Magnus Damm79ee0312009-07-08 13:22:04 +02001268 .suspend_noirq = omap_mpuio_suspend_noirq,
1269 .resume_noirq = omap_mpuio_resume_noirq,
1270};
1271
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02001272/* use platform_driver for this. */
David Brownell11a78b72006-12-06 17:14:11 -08001273static struct platform_driver omap_mpuio_driver = {
David Brownell11a78b72006-12-06 17:14:11 -08001274 .driver = {
1275 .name = "mpuio",
Magnus Damm79ee0312009-07-08 13:22:04 +02001276 .pm = &omap_mpuio_dev_pm_ops,
David Brownell11a78b72006-12-06 17:14:11 -08001277 },
1278};
1279
1280static struct platform_device omap_mpuio_device = {
1281 .name = "mpuio",
1282 .id = -1,
1283 .dev = {
1284 .driver = &omap_mpuio_driver.driver,
1285 }
1286 /* could list the /proc/iomem resources */
1287};
1288
1289static inline void mpuio_init(void)
1290{
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001291 struct gpio_bank *bank = get_gpio_bank(OMAP_MPUIO(0));
1292 platform_set_drvdata(&omap_mpuio_device, bank);
David Brownellfcf126d2007-04-02 12:46:47 -07001293
David Brownell11a78b72006-12-06 17:14:11 -08001294 if (platform_driver_register(&omap_mpuio_driver) == 0)
1295 (void) platform_device_register(&omap_mpuio_device);
1296}
1297
1298#else
1299static inline void mpuio_init(void) {}
1300#endif /* 16xx */
1301
David Brownelle5c56ed2006-12-06 17:13:59 -08001302#else
1303
1304extern struct irq_chip mpuio_irq_chip;
1305
1306#define bank_is_mpuio(bank) 0
David Brownell11a78b72006-12-06 17:14:11 -08001307static inline void mpuio_init(void) {}
David Brownelle5c56ed2006-12-06 17:13:59 -08001308
1309#endif
1310
1311/*---------------------------------------------------------------------*/
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001312
David Brownell52e31342008-03-03 12:43:23 -08001313/* REVISIT these are stupid implementations! replace by ones that
1314 * don't switch on METHOD_* and which mostly avoid spinlocks
1315 */
1316
1317static int gpio_input(struct gpio_chip *chip, unsigned offset)
1318{
1319 struct gpio_bank *bank;
1320 unsigned long flags;
1321
1322 bank = container_of(chip, struct gpio_bank, chip);
1323 spin_lock_irqsave(&bank->lock, flags);
1324 _set_gpio_direction(bank, offset, 1);
1325 spin_unlock_irqrestore(&bank->lock, flags);
1326 return 0;
1327}
1328
Roger Quadrosb37c45b2009-08-05 16:53:24 +03001329static int gpio_is_input(struct gpio_bank *bank, int mask)
1330{
1331 void __iomem *reg = bank->base;
1332
1333 switch (bank->method) {
1334 case METHOD_MPUIO:
Tony Lindgren5de62b82010-12-07 16:26:58 -08001335 reg += OMAP_MPUIO_IO_CNTL / bank->stride;
Roger Quadrosb37c45b2009-08-05 16:53:24 +03001336 break;
1337 case METHOD_GPIO_1510:
1338 reg += OMAP1510_GPIO_DIR_CONTROL;
1339 break;
1340 case METHOD_GPIO_1610:
1341 reg += OMAP1610_GPIO_DIRECTION;
1342 break;
Alistair Buxton7c006922009-09-22 10:02:58 +01001343 case METHOD_GPIO_7XX:
1344 reg += OMAP7XX_GPIO_DIR_CONTROL;
Roger Quadrosb37c45b2009-08-05 16:53:24 +03001345 break;
1346 case METHOD_GPIO_24XX:
1347 reg += OMAP24XX_GPIO_OE;
1348 break;
Charulatha V9f096862010-05-14 12:05:27 -07001349 case METHOD_GPIO_44XX:
1350 reg += OMAP4_GPIO_OE;
1351 break;
1352 default:
1353 WARN_ONCE(1, "gpio_is_input: incorrect OMAP GPIO method");
1354 return -EINVAL;
Roger Quadrosb37c45b2009-08-05 16:53:24 +03001355 }
1356 return __raw_readl(reg) & mask;
1357}
1358
David Brownell52e31342008-03-03 12:43:23 -08001359static int gpio_get(struct gpio_chip *chip, unsigned offset)
1360{
Roger Quadrosb37c45b2009-08-05 16:53:24 +03001361 struct gpio_bank *bank;
1362 void __iomem *reg;
1363 int gpio;
1364 u32 mask;
1365
1366 gpio = chip->base + offset;
1367 bank = get_gpio_bank(gpio);
1368 reg = bank->base;
1369 mask = 1 << get_gpio_index(gpio);
1370
1371 if (gpio_is_input(bank, mask))
1372 return _get_gpio_datain(bank, gpio);
1373 else
1374 return _get_gpio_dataout(bank, gpio);
David Brownell52e31342008-03-03 12:43:23 -08001375}
1376
1377static int gpio_output(struct gpio_chip *chip, unsigned offset, int value)
1378{
1379 struct gpio_bank *bank;
1380 unsigned long flags;
1381
1382 bank = container_of(chip, struct gpio_bank, chip);
1383 spin_lock_irqsave(&bank->lock, flags);
1384 _set_gpio_dataout(bank, offset, value);
1385 _set_gpio_direction(bank, offset, 0);
1386 spin_unlock_irqrestore(&bank->lock, flags);
1387 return 0;
1388}
1389
Felipe Balbi168ef3d2010-05-26 14:42:23 -07001390static int gpio_debounce(struct gpio_chip *chip, unsigned offset,
1391 unsigned debounce)
1392{
1393 struct gpio_bank *bank;
1394 unsigned long flags;
1395
1396 bank = container_of(chip, struct gpio_bank, chip);
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001397
1398 if (!bank->dbck) {
1399 bank->dbck = clk_get(bank->dev, "dbclk");
1400 if (IS_ERR(bank->dbck))
1401 dev_err(bank->dev, "Could not get gpio dbck\n");
1402 }
1403
Felipe Balbi168ef3d2010-05-26 14:42:23 -07001404 spin_lock_irqsave(&bank->lock, flags);
1405 _set_gpio_debounce(bank, offset, debounce);
1406 spin_unlock_irqrestore(&bank->lock, flags);
1407
1408 return 0;
1409}
1410
David Brownell52e31342008-03-03 12:43:23 -08001411static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1412{
1413 struct gpio_bank *bank;
1414 unsigned long flags;
1415
1416 bank = container_of(chip, struct gpio_bank, chip);
1417 spin_lock_irqsave(&bank->lock, flags);
1418 _set_gpio_dataout(bank, offset, value);
1419 spin_unlock_irqrestore(&bank->lock, flags);
1420}
1421
David Brownella007b702008-12-10 17:35:25 -08001422static int gpio_2irq(struct gpio_chip *chip, unsigned offset)
1423{
1424 struct gpio_bank *bank;
1425
1426 bank = container_of(chip, struct gpio_bank, chip);
1427 return bank->virtual_irq_start + offset;
1428}
1429
David Brownell52e31342008-03-03 12:43:23 -08001430/*---------------------------------------------------------------------*/
1431
Tony Lindgren9a748052010-12-07 16:26:56 -08001432static void __init omap_gpio_show_rev(struct gpio_bank *bank)
Tony Lindgren9f7065d2009-10-19 15:25:20 -07001433{
1434 u32 rev;
1435
Tony Lindgren9a748052010-12-07 16:26:56 -08001436 if (cpu_is_omap16xx() && !(bank->method != METHOD_MPUIO))
1437 rev = __raw_readw(bank->base + OMAP1610_GPIO_REVISION);
Tony Lindgren9f7065d2009-10-19 15:25:20 -07001438 else if (cpu_is_omap24xx() || cpu_is_omap34xx())
Tony Lindgren9a748052010-12-07 16:26:56 -08001439 rev = __raw_readl(bank->base + OMAP24XX_GPIO_REVISION);
Tony Lindgren9f7065d2009-10-19 15:25:20 -07001440 else if (cpu_is_omap44xx())
Tony Lindgren9a748052010-12-07 16:26:56 -08001441 rev = __raw_readl(bank->base + OMAP4_GPIO_REVISION);
Tony Lindgren9f7065d2009-10-19 15:25:20 -07001442 else
1443 return;
1444
1445 printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
1446 (rev >> 4) & 0x0f, rev & 0x0f);
1447}
1448
David Brownell8ba55c52008-02-26 11:10:50 -08001449/* This lock class tells lockdep that GPIO irqs are in a different
1450 * category than their parents, so it won't report false recursion.
1451 */
1452static struct lock_class_key gpio_lock_class;
1453
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001454static inline int init_gpio_info(struct platform_device *pdev)
1455{
1456 /* TODO: Analyze removing gpio_bank_count usage from driver code */
1457 gpio_bank = kzalloc(gpio_bank_count * sizeof(struct gpio_bank),
1458 GFP_KERNEL);
1459 if (!gpio_bank) {
1460 dev_err(&pdev->dev, "Memory alloc failed for gpio_bank\n");
1461 return -ENOMEM;
1462 }
1463 return 0;
1464}
1465
1466/* TODO: Cleanup cpu_is_* checks */
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001467static void omap_gpio_mod_init(struct gpio_bank *bank, int id)
1468{
1469 if (cpu_class_is_omap2()) {
1470 if (cpu_is_omap44xx()) {
1471 __raw_writel(0xffffffff, bank->base +
1472 OMAP4_GPIO_IRQSTATUSCLR0);
1473 __raw_writel(0x00000000, bank->base +
1474 OMAP4_GPIO_DEBOUNCENABLE);
1475 /* Initialize interface clk ungated, module enabled */
1476 __raw_writel(0, bank->base + OMAP4_GPIO_CTRL);
1477 } else if (cpu_is_omap34xx()) {
1478 __raw_writel(0x00000000, bank->base +
1479 OMAP24XX_GPIO_IRQENABLE1);
1480 __raw_writel(0xffffffff, bank->base +
1481 OMAP24XX_GPIO_IRQSTATUS1);
1482 __raw_writel(0x00000000, bank->base +
1483 OMAP24XX_GPIO_DEBOUNCE_EN);
1484
1485 /* Initialize interface clk ungated, module enabled */
1486 __raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL);
1487 } else if (cpu_is_omap24xx()) {
1488 static const u32 non_wakeup_gpios[] = {
1489 0xe203ffc0, 0x08700040
1490 };
1491 if (id < ARRAY_SIZE(non_wakeup_gpios))
1492 bank->non_wakeup_gpios = non_wakeup_gpios[id];
1493 }
1494 } else if (cpu_class_is_omap1()) {
1495 if (bank_is_mpuio(bank))
Tony Lindgren5de62b82010-12-07 16:26:58 -08001496 __raw_writew(0xffff, bank->base +
1497 OMAP_MPUIO_GPIO_MASKIT / bank->stride);
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001498 if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) {
1499 __raw_writew(0xffff, bank->base
1500 + OMAP1510_GPIO_INT_MASK);
1501 __raw_writew(0x0000, bank->base
1502 + OMAP1510_GPIO_INT_STATUS);
1503 }
1504 if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) {
1505 __raw_writew(0x0000, bank->base
1506 + OMAP1610_GPIO_IRQENABLE1);
1507 __raw_writew(0xffff, bank->base
1508 + OMAP1610_GPIO_IRQSTATUS1);
1509 __raw_writew(0x0014, bank->base
1510 + OMAP1610_GPIO_SYSCONFIG);
1511
1512 /*
1513 * Enable system clock for GPIO module.
1514 * The CAM_CLK_CTRL *is* really the right place.
1515 */
1516 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
1517 ULPD_CAM_CLK_CTRL);
1518 }
1519 if (cpu_is_omap7xx() && bank->method == METHOD_GPIO_7XX) {
1520 __raw_writel(0xffffffff, bank->base
1521 + OMAP7XX_GPIO_INT_MASK);
1522 __raw_writel(0x00000000, bank->base
1523 + OMAP7XX_GPIO_INT_STATUS);
1524 }
1525 }
1526}
1527
Russell Kingd52b31d2011-05-27 13:56:12 -07001528static void __devinit omap_gpio_chip_init(struct gpio_bank *bank)
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001529{
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001530 int j;
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001531 static int gpio;
1532
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001533 bank->mod_usage = 0;
1534 /*
1535 * REVISIT eventually switch from OMAP-specific gpio structs
1536 * over to the generic ones
1537 */
1538 bank->chip.request = omap_gpio_request;
1539 bank->chip.free = omap_gpio_free;
1540 bank->chip.direction_input = gpio_input;
1541 bank->chip.get = gpio_get;
1542 bank->chip.direction_output = gpio_output;
1543 bank->chip.set_debounce = gpio_debounce;
1544 bank->chip.set = gpio_set;
1545 bank->chip.to_irq = gpio_2irq;
1546 if (bank_is_mpuio(bank)) {
1547 bank->chip.label = "mpuio";
1548#ifdef CONFIG_ARCH_OMAP16XX
1549 bank->chip.dev = &omap_mpuio_device.dev;
1550#endif
1551 bank->chip.base = OMAP_MPUIO(0);
1552 } else {
1553 bank->chip.label = "gpio";
1554 bank->chip.base = gpio;
1555 gpio += bank_width;
1556 }
1557 bank->chip.ngpio = bank_width;
1558
1559 gpiochip_add(&bank->chip);
1560
1561 for (j = bank->virtual_irq_start;
1562 j < bank->virtual_irq_start + bank_width; j++) {
Thomas Gleixner1475b852011-03-22 17:11:09 +01001563 irq_set_lockdep_class(j, &gpio_lock_class);
Thomas Gleixner6845664a2011-03-24 13:25:22 +01001564 irq_set_chip_data(j, bank);
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001565 if (bank_is_mpuio(bank))
Thomas Gleixner6845664a2011-03-24 13:25:22 +01001566 irq_set_chip(j, &mpuio_irq_chip);
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001567 else
Thomas Gleixner6845664a2011-03-24 13:25:22 +01001568 irq_set_chip(j, &gpio_irq_chip);
1569 irq_set_handler(j, handle_simple_irq);
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001570 set_irq_flags(j, IRQF_VALID);
1571 }
Thomas Gleixner6845664a2011-03-24 13:25:22 +01001572 irq_set_chained_handler(bank->irq, gpio_irq_handler);
1573 irq_set_handler_data(bank->irq, bank);
Varadarajan, Charulatha2fae7fb2010-12-07 16:26:55 -08001574}
1575
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001576static int __devinit omap_gpio_probe(struct platform_device *pdev)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001577{
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001578 static int gpio_init_done;
1579 struct omap_gpio_platform_data *pdata;
1580 struct resource *res;
1581 int id;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001582 struct gpio_bank *bank;
1583
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001584 if (!pdev->dev.platform_data)
1585 return -EINVAL;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001586
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001587 pdata = pdev->dev.platform_data;
Syed Mohammed Khasim56a25642006-12-06 17:14:08 -08001588
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001589 if (!gpio_init_done) {
1590 int ret;
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -08001591
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001592 ret = init_gpio_info(pdev);
1593 if (ret)
1594 return ret;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001595 }
1596
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001597 id = pdev->id;
1598 bank = &gpio_bank[id];
1599
1600 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1601 if (unlikely(!res)) {
1602 dev_err(&pdev->dev, "GPIO Bank %i Invalid IRQ resource\n", id);
1603 return -ENODEV;
1604 }
1605
1606 bank->irq = res->start;
1607 bank->virtual_irq_start = pdata->virtual_irq_start;
1608 bank->method = pdata->bank_type;
1609 bank->dev = &pdev->dev;
1610 bank->dbck_flag = pdata->dbck_flag;
Tony Lindgren5de62b82010-12-07 16:26:58 -08001611 bank->stride = pdata->bank_stride;
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001612 bank_width = pdata->bank_width;
1613
1614 spin_lock_init(&bank->lock);
1615
1616 /* Static mapping, never released */
1617 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1618 if (unlikely(!res)) {
1619 dev_err(&pdev->dev, "GPIO Bank %i Invalid mem resource\n", id);
1620 return -ENODEV;
1621 }
1622
1623 bank->base = ioremap(res->start, resource_size(res));
1624 if (!bank->base) {
1625 dev_err(&pdev->dev, "Could not ioremap gpio bank%i\n", id);
1626 return -ENOMEM;
1627 }
1628
1629 pm_runtime_enable(bank->dev);
1630 pm_runtime_get_sync(bank->dev);
1631
1632 omap_gpio_mod_init(bank, id);
1633 omap_gpio_chip_init(bank);
Tony Lindgren9a748052010-12-07 16:26:56 -08001634 omap_gpio_show_rev(bank);
Tony Lindgren9f7065d2009-10-19 15:25:20 -07001635
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001636 if (!gpio_init_done)
1637 gpio_init_done = 1;
1638
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001639 return 0;
1640}
1641
Tony Lindgren140455f2010-02-12 12:26:48 -08001642#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02001643static int omap_gpio_suspend(void)
Tony Lindgren92105bb2005-09-07 17:20:26 +01001644{
1645 int i;
1646
Syed Mohammed, Khasim5492fb12007-11-29 16:15:11 -08001647 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
Tony Lindgren92105bb2005-09-07 17:20:26 +01001648 return 0;
1649
1650 for (i = 0; i < gpio_bank_count; i++) {
1651 struct gpio_bank *bank = &gpio_bank[i];
1652 void __iomem *wake_status;
1653 void __iomem *wake_clear;
1654 void __iomem *wake_set;
David Brownella6472532008-03-03 04:33:30 -08001655 unsigned long flags;
Tony Lindgren92105bb2005-09-07 17:20:26 +01001656
1657 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -08001658#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren92105bb2005-09-07 17:20:26 +01001659 case METHOD_GPIO_1610:
1660 wake_status = bank->base + OMAP1610_GPIO_WAKEUPENABLE;
1661 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1662 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1663 break;
David Brownelle5c56ed2006-12-06 17:13:59 -08001664#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -08001665#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +01001666 case METHOD_GPIO_24XX:
Tero Kristo723fdb72008-11-26 14:35:16 -08001667 wake_status = bank->base + OMAP24XX_GPIO_WAKE_EN;
Tony Lindgren92105bb2005-09-07 17:20:26 +01001668 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1669 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
1670 break;
David Brownelle5c56ed2006-12-06 17:13:59 -08001671#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301672#ifdef CONFIG_ARCH_OMAP4
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001673 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301674 wake_status = bank->base + OMAP4_GPIO_IRQWAKEN0;
1675 wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
1676 wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
1677 break;
1678#endif
Tony Lindgren92105bb2005-09-07 17:20:26 +01001679 default:
1680 continue;
1681 }
1682
David Brownella6472532008-03-03 04:33:30 -08001683 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +01001684 bank->saved_wakeup = __raw_readl(wake_status);
1685 __raw_writel(0xffffffff, wake_clear);
1686 __raw_writel(bank->suspend_wakeup, wake_set);
David Brownella6472532008-03-03 04:33:30 -08001687 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +01001688 }
1689
1690 return 0;
1691}
1692
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02001693static void omap_gpio_resume(void)
Tony Lindgren92105bb2005-09-07 17:20:26 +01001694{
1695 int i;
1696
Tero Kristo723fdb72008-11-26 14:35:16 -08001697 if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02001698 return;
Tony Lindgren92105bb2005-09-07 17:20:26 +01001699
1700 for (i = 0; i < gpio_bank_count; i++) {
1701 struct gpio_bank *bank = &gpio_bank[i];
1702 void __iomem *wake_clear;
1703 void __iomem *wake_set;
David Brownella6472532008-03-03 04:33:30 -08001704 unsigned long flags;
Tony Lindgren92105bb2005-09-07 17:20:26 +01001705
1706 switch (bank->method) {
David Brownelle5c56ed2006-12-06 17:13:59 -08001707#ifdef CONFIG_ARCH_OMAP16XX
Tony Lindgren92105bb2005-09-07 17:20:26 +01001708 case METHOD_GPIO_1610:
1709 wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
1710 wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
1711 break;
David Brownelle5c56ed2006-12-06 17:13:59 -08001712#endif
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -08001713#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
Tony Lindgren92105bb2005-09-07 17:20:26 +01001714 case METHOD_GPIO_24XX:
Tony Lindgren0d9356c2006-09-25 12:41:45 +03001715 wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
1716 wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
Tony Lindgren92105bb2005-09-07 17:20:26 +01001717 break;
David Brownelle5c56ed2006-12-06 17:13:59 -08001718#endif
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301719#ifdef CONFIG_ARCH_OMAP4
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001720 case METHOD_GPIO_44XX:
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301721 wake_clear = bank->base + OMAP4_GPIO_IRQWAKEN0;
1722 wake_set = bank->base + OMAP4_GPIO_IRQWAKEN0;
1723 break;
1724#endif
Tony Lindgren92105bb2005-09-07 17:20:26 +01001725 default:
1726 continue;
1727 }
1728
David Brownella6472532008-03-03 04:33:30 -08001729 spin_lock_irqsave(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +01001730 __raw_writel(0xffffffff, wake_clear);
1731 __raw_writel(bank->saved_wakeup, wake_set);
David Brownella6472532008-03-03 04:33:30 -08001732 spin_unlock_irqrestore(&bank->lock, flags);
Tony Lindgren92105bb2005-09-07 17:20:26 +01001733 }
Tony Lindgren92105bb2005-09-07 17:20:26 +01001734}
1735
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02001736static struct syscore_ops omap_gpio_syscore_ops = {
Tony Lindgren92105bb2005-09-07 17:20:26 +01001737 .suspend = omap_gpio_suspend,
1738 .resume = omap_gpio_resume,
1739};
1740
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001741#endif
1742
Tony Lindgren140455f2010-02-12 12:26:48 -08001743#ifdef CONFIG_ARCH_OMAP2PLUS
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001744
1745static int workaround_enabled;
1746
Paul Walmsley72e06d02010-12-21 21:05:16 -07001747void omap2_gpio_prepare_for_idle(int off_mode)
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001748{
1749 int i, c = 0;
Tero Kristoa118b5f2008-12-22 14:27:12 +02001750 int min = 0;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001751
Tero Kristoa118b5f2008-12-22 14:27:12 +02001752 if (cpu_is_omap34xx())
1753 min = 1;
Kevin Hilman43ffcd92009-01-27 11:09:24 -08001754
Tero Kristoa118b5f2008-12-22 14:27:12 +02001755 for (i = min; i < gpio_bank_count; i++) {
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001756 struct gpio_bank *bank = &gpio_bank[i];
Sanjeev Premica828762010-09-23 18:27:18 -07001757 u32 l1 = 0, l2 = 0;
Kevin Hilman0aed04352010-09-22 16:06:27 -07001758 int j;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001759
Kevin Hilman0aed04352010-09-22 16:06:27 -07001760 for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
Kevin Hilman8865b9b2009-01-27 11:15:34 -08001761 clk_disable(bank->dbck);
1762
Paul Walmsley72e06d02010-12-21 21:05:16 -07001763 if (!off_mode)
Kevin Hilman43ffcd92009-01-27 11:09:24 -08001764 continue;
1765
1766 /* If going to OFF, remove triggering for all
1767 * non-wakeup GPIOs. Otherwise spurious IRQs will be
1768 * generated. See OMAP2420 Errata item 1.101. */
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001769 if (!(bank->enabled_non_wakeup_gpios))
1770 continue;
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001771
1772 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1773 bank->saved_datain = __raw_readl(bank->base +
1774 OMAP24XX_GPIO_DATAIN);
1775 l1 = __raw_readl(bank->base +
1776 OMAP24XX_GPIO_FALLINGDETECT);
1777 l2 = __raw_readl(bank->base +
1778 OMAP24XX_GPIO_RISINGDETECT);
1779 }
1780
1781 if (cpu_is_omap44xx()) {
1782 bank->saved_datain = __raw_readl(bank->base +
1783 OMAP4_GPIO_DATAIN);
1784 l1 = __raw_readl(bank->base +
1785 OMAP4_GPIO_FALLINGDETECT);
1786 l2 = __raw_readl(bank->base +
1787 OMAP4_GPIO_RISINGDETECT);
1788 }
1789
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001790 bank->saved_fallingdetect = l1;
1791 bank->saved_risingdetect = l2;
1792 l1 &= ~bank->enabled_non_wakeup_gpios;
1793 l2 &= ~bank->enabled_non_wakeup_gpios;
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001794
1795 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1796 __raw_writel(l1, bank->base +
1797 OMAP24XX_GPIO_FALLINGDETECT);
1798 __raw_writel(l2, bank->base +
1799 OMAP24XX_GPIO_RISINGDETECT);
1800 }
1801
1802 if (cpu_is_omap44xx()) {
1803 __raw_writel(l1, bank->base + OMAP4_GPIO_FALLINGDETECT);
1804 __raw_writel(l2, bank->base + OMAP4_GPIO_RISINGDETECT);
1805 }
1806
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001807 c++;
1808 }
1809 if (!c) {
1810 workaround_enabled = 0;
1811 return;
1812 }
1813 workaround_enabled = 1;
1814}
1815
Kevin Hilman43ffcd92009-01-27 11:09:24 -08001816void omap2_gpio_resume_after_idle(void)
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001817{
1818 int i;
Tero Kristoa118b5f2008-12-22 14:27:12 +02001819 int min = 0;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001820
Tero Kristoa118b5f2008-12-22 14:27:12 +02001821 if (cpu_is_omap34xx())
1822 min = 1;
1823 for (i = min; i < gpio_bank_count; i++) {
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001824 struct gpio_bank *bank = &gpio_bank[i];
Sanjeev Premica828762010-09-23 18:27:18 -07001825 u32 l = 0, gen, gen0, gen1;
Kevin Hilman0aed04352010-09-22 16:06:27 -07001826 int j;
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001827
Kevin Hilman0aed04352010-09-22 16:06:27 -07001828 for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
Kevin Hilman8865b9b2009-01-27 11:15:34 -08001829 clk_enable(bank->dbck);
1830
Kevin Hilman43ffcd92009-01-27 11:09:24 -08001831 if (!workaround_enabled)
1832 continue;
1833
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001834 if (!(bank->enabled_non_wakeup_gpios))
1835 continue;
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001836
1837 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1838 __raw_writel(bank->saved_fallingdetect,
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001839 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001840 __raw_writel(bank->saved_risingdetect,
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001841 bank->base + OMAP24XX_GPIO_RISINGDETECT);
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001842 l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
1843 }
1844
1845 if (cpu_is_omap44xx()) {
1846 __raw_writel(bank->saved_fallingdetect,
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301847 bank->base + OMAP4_GPIO_FALLINGDETECT);
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001848 __raw_writel(bank->saved_risingdetect,
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301849 bank->base + OMAP4_GPIO_RISINGDETECT);
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001850 l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN);
1851 }
1852
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001853 /* Check if any of the non-wakeup interrupt GPIOs have changed
1854 * state. If so, generate an IRQ by software. This is
1855 * horribly racy, but it's the best we can do to work around
1856 * this silicon bug. */
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001857 l ^= bank->saved_datain;
Tero Kristoa118b5f2008-12-22 14:27:12 +02001858 l &= bank->enabled_non_wakeup_gpios;
Eero Nurkkala82dbb9d2009-08-28 10:51:36 -07001859
1860 /*
1861 * No need to generate IRQs for the rising edge for gpio IRQs
1862 * configured with falling edge only; and vice versa.
1863 */
1864 gen0 = l & bank->saved_fallingdetect;
1865 gen0 &= bank->saved_datain;
1866
1867 gen1 = l & bank->saved_risingdetect;
1868 gen1 &= ~(bank->saved_datain);
1869
1870 /* FIXME: Consider GPIO IRQs with level detections properly! */
1871 gen = l & (~(bank->saved_fallingdetect) &
1872 ~(bank->saved_risingdetect));
1873 /* Consider all GPIO IRQs needed to be updated */
1874 gen |= gen0 | gen1;
1875
1876 if (gen) {
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001877 u32 old0, old1;
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001878
Sergio Aguirref00d6492010-03-03 16:21:08 +00001879 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001880 old0 = __raw_readl(bank->base +
1881 OMAP24XX_GPIO_LEVELDETECT0);
1882 old1 = __raw_readl(bank->base +
1883 OMAP24XX_GPIO_LEVELDETECT1);
Sergio Aguirref00d6492010-03-03 16:21:08 +00001884 __raw_writel(old0 | gen, bank->base +
Eero Nurkkala82dbb9d2009-08-28 10:51:36 -07001885 OMAP24XX_GPIO_LEVELDETECT0);
Sergio Aguirref00d6492010-03-03 16:21:08 +00001886 __raw_writel(old1 | gen, bank->base +
Eero Nurkkala82dbb9d2009-08-28 10:51:36 -07001887 OMAP24XX_GPIO_LEVELDETECT1);
Sergio Aguirref00d6492010-03-03 16:21:08 +00001888 __raw_writel(old0, bank->base +
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001889 OMAP24XX_GPIO_LEVELDETECT0);
Sergio Aguirref00d6492010-03-03 16:21:08 +00001890 __raw_writel(old1, bank->base +
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001891 OMAP24XX_GPIO_LEVELDETECT1);
1892 }
1893
1894 if (cpu_is_omap44xx()) {
1895 old0 = __raw_readl(bank->base +
1896 OMAP4_GPIO_LEVELDETECT0);
1897 old1 = __raw_readl(bank->base +
Syed Rafiuddin78a1a6d2009-07-28 18:57:30 +05301898 OMAP4_GPIO_LEVELDETECT1);
Tony Lindgren3f1686a2010-02-15 09:27:25 -08001899 __raw_writel(old0 | l, bank->base +
1900 OMAP4_GPIO_LEVELDETECT0);
1901 __raw_writel(old1 | l, bank->base +
1902 OMAP4_GPIO_LEVELDETECT1);
1903 __raw_writel(old0, bank->base +
1904 OMAP4_GPIO_LEVELDETECT0);
1905 __raw_writel(old1, bank->base +
1906 OMAP4_GPIO_LEVELDETECT1);
1907 }
Juha Yrjola3ac4fa92006-12-06 17:13:52 -08001908 }
1909 }
1910
1911}
1912
Tony Lindgren92105bb2005-09-07 17:20:26 +01001913#endif
1914
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -08001915#ifdef CONFIG_ARCH_OMAP3
Rajendra Nayak40c670f2008-09-26 17:47:48 +05301916/* save the registers of bank 2-6 */
1917void omap_gpio_save_context(void)
1918{
1919 int i;
1920
1921 /* saving banks from 2-6 only since GPIO1 is in WKUP */
1922 for (i = 1; i < gpio_bank_count; i++) {
1923 struct gpio_bank *bank = &gpio_bank[i];
Rajendra Nayak40c670f2008-09-26 17:47:48 +05301924 gpio_context[i].irqenable1 =
1925 __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1);
1926 gpio_context[i].irqenable2 =
1927 __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE2);
1928 gpio_context[i].wake_en =
1929 __raw_readl(bank->base + OMAP24XX_GPIO_WAKE_EN);
1930 gpio_context[i].ctrl =
1931 __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
1932 gpio_context[i].oe =
1933 __raw_readl(bank->base + OMAP24XX_GPIO_OE);
1934 gpio_context[i].leveldetect0 =
1935 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
1936 gpio_context[i].leveldetect1 =
1937 __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
1938 gpio_context[i].risingdetect =
1939 __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
1940 gpio_context[i].fallingdetect =
1941 __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
1942 gpio_context[i].dataout =
1943 __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT);
Rajendra Nayak40c670f2008-09-26 17:47:48 +05301944 }
1945}
1946
1947/* restore the required registers of bank 2-6 */
1948void omap_gpio_restore_context(void)
1949{
1950 int i;
1951
1952 for (i = 1; i < gpio_bank_count; i++) {
1953 struct gpio_bank *bank = &gpio_bank[i];
Rajendra Nayak40c670f2008-09-26 17:47:48 +05301954 __raw_writel(gpio_context[i].irqenable1,
1955 bank->base + OMAP24XX_GPIO_IRQENABLE1);
1956 __raw_writel(gpio_context[i].irqenable2,
1957 bank->base + OMAP24XX_GPIO_IRQENABLE2);
1958 __raw_writel(gpio_context[i].wake_en,
1959 bank->base + OMAP24XX_GPIO_WAKE_EN);
1960 __raw_writel(gpio_context[i].ctrl,
1961 bank->base + OMAP24XX_GPIO_CTRL);
1962 __raw_writel(gpio_context[i].oe,
1963 bank->base + OMAP24XX_GPIO_OE);
1964 __raw_writel(gpio_context[i].leveldetect0,
1965 bank->base + OMAP24XX_GPIO_LEVELDETECT0);
1966 __raw_writel(gpio_context[i].leveldetect1,
1967 bank->base + OMAP24XX_GPIO_LEVELDETECT1);
1968 __raw_writel(gpio_context[i].risingdetect,
1969 bank->base + OMAP24XX_GPIO_RISINGDETECT);
1970 __raw_writel(gpio_context[i].fallingdetect,
1971 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
1972 __raw_writel(gpio_context[i].dataout,
1973 bank->base + OMAP24XX_GPIO_DATAOUT);
Rajendra Nayak40c670f2008-09-26 17:47:48 +05301974 }
1975}
1976#endif
1977
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001978static struct platform_driver omap_gpio_driver = {
1979 .probe = omap_gpio_probe,
1980 .driver = {
1981 .name = "omap_gpio",
1982 },
1983};
1984
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001985/*
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001986 * gpio driver register needs to be done before
1987 * machine_init functions access gpio APIs.
1988 * Hence omap_gpio_drv_reg() is a postcore_initcall.
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001989 */
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001990static int __init omap_gpio_drv_reg(void)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001991{
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001992 return platform_driver_register(&omap_gpio_driver);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001993}
Varadarajan, Charulatha77640aa2010-12-07 16:26:57 -08001994postcore_initcall(omap_gpio_drv_reg);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001995
Tony Lindgren92105bb2005-09-07 17:20:26 +01001996static int __init omap_gpio_sysinit(void)
1997{
David Brownell11a78b72006-12-06 17:14:11 -08001998 mpuio_init();
1999
Tony Lindgren140455f2010-02-12 12:26:48 -08002000#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02002001 if (cpu_is_omap16xx() || cpu_class_is_omap2())
2002 register_syscore_ops(&omap_gpio_syscore_ops);
Tony Lindgren92105bb2005-09-07 17:20:26 +01002003#endif
2004
Rafael J. Wysocki3c437ff2011-04-22 22:02:46 +02002005 return 0;
Tony Lindgren92105bb2005-09-07 17:20:26 +01002006}
2007
Tony Lindgren92105bb2005-09-07 17:20:26 +01002008arch_initcall(omap_gpio_sysinit);