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gpio.h
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1 /*
2  * Copyright 2006-2009 Analog Devices Inc.
3  *
4  * Licensed under the GPL-2 or later.
5  */
6 
7 #ifndef __ARCH_BLACKFIN_GPIO_H__
8 #define __ARCH_BLACKFIN_GPIO_H__
9 
10 #define gpio_bank(x) ((x) >> 4)
11 #define gpio_bit(x) (1<<((x) & 0xF))
12 #define gpio_sub_n(x) ((x) & 0xF)
13 
14 #define GPIO_BANKSIZE 16
15 #define GPIO_BANK_NUM DIV_ROUND_UP(MAX_BLACKFIN_GPIOS, GPIO_BANKSIZE)
16 
17 #include <mach/gpio.h>
18 
19 #define PERIPHERAL_USAGE 1
20 #define GPIO_USAGE 0
21 
22 #ifndef BFIN_GPIO_PINT
23 # define BFIN_GPIO_PINT 0
24 #endif
25 
26 #ifndef __ASSEMBLY__
27 
28 #include <linux/compiler.h>
29 #include <linux/gpio.h>
30 
31 /***********************************************************
32 *
33 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
34 *
35 * INPUTS/OUTPUTS:
36 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
37 *
38 *
39 * DESCRIPTION: These functions abstract direct register access
40 * to Blackfin processor General Purpose
41 * Ports Regsiters
42 *
43 * CAUTION: These functions do not belong to the GPIO Driver API
44 *************************************************************
45 * MODIFICATION HISTORY :
46 **************************************************************/
47 
48 #if !BFIN_GPIO_PINT
49 void set_gpio_dir(unsigned, unsigned short);
50 void set_gpio_inen(unsigned, unsigned short);
51 void set_gpio_polar(unsigned, unsigned short);
52 void set_gpio_edge(unsigned, unsigned short);
53 void set_gpio_both(unsigned, unsigned short);
54 void set_gpio_data(unsigned, unsigned short);
55 void set_gpio_maska(unsigned, unsigned short);
56 void set_gpio_maskb(unsigned, unsigned short);
57 void set_gpio_toggle(unsigned);
58 void set_gpiop_dir(unsigned, unsigned short);
59 void set_gpiop_inen(unsigned, unsigned short);
60 void set_gpiop_polar(unsigned, unsigned short);
61 void set_gpiop_edge(unsigned, unsigned short);
62 void set_gpiop_both(unsigned, unsigned short);
63 void set_gpiop_data(unsigned, unsigned short);
64 void set_gpiop_maska(unsigned, unsigned short);
65 void set_gpiop_maskb(unsigned, unsigned short);
66 unsigned short get_gpio_dir(unsigned);
67 unsigned short get_gpio_inen(unsigned);
68 unsigned short get_gpio_polar(unsigned);
69 unsigned short get_gpio_edge(unsigned);
70 unsigned short get_gpio_both(unsigned);
71 unsigned short get_gpio_maska(unsigned);
72 unsigned short get_gpio_maskb(unsigned);
73 unsigned short get_gpio_data(unsigned);
74 unsigned short get_gpiop_dir(unsigned);
75 unsigned short get_gpiop_inen(unsigned);
76 unsigned short get_gpiop_polar(unsigned);
77 unsigned short get_gpiop_edge(unsigned);
78 unsigned short get_gpiop_both(unsigned);
79 unsigned short get_gpiop_maska(unsigned);
80 unsigned short get_gpiop_maskb(unsigned);
81 unsigned short get_gpiop_data(unsigned);
82 
83 struct gpio_port_t {
84  unsigned short data;
85  unsigned short dummy1;
86  unsigned short data_clear;
87  unsigned short dummy2;
88  unsigned short data_set;
89  unsigned short dummy3;
90  unsigned short toggle;
91  unsigned short dummy4;
92  unsigned short maska;
93  unsigned short dummy5;
94  unsigned short maska_clear;
95  unsigned short dummy6;
96  unsigned short maska_set;
97  unsigned short dummy7;
98  unsigned short maska_toggle;
99  unsigned short dummy8;
100  unsigned short maskb;
101  unsigned short dummy9;
102  unsigned short maskb_clear;
103  unsigned short dummy10;
104  unsigned short maskb_set;
105  unsigned short dummy11;
106  unsigned short maskb_toggle;
107  unsigned short dummy12;
108  unsigned short dir;
109  unsigned short dummy13;
110  unsigned short polar;
111  unsigned short dummy14;
112  unsigned short edge;
113  unsigned short dummy15;
114  unsigned short both;
115  unsigned short dummy16;
116  unsigned short inen;
117 };
118 #endif
119 
120 #ifdef BFIN_SPECIAL_GPIO_BANKS
121 void bfin_special_gpio_free(unsigned gpio);
122 int bfin_special_gpio_request(unsigned gpio, const char *label);
123 # ifdef CONFIG_PM
124 void bfin_special_gpio_pm_hibernate_restore(void);
125 void bfin_special_gpio_pm_hibernate_suspend(void);
126 # endif
127 #endif
128 
129 #ifdef CONFIG_PM
130 int bfin_pm_standby_ctrl(unsigned ctrl);
131 
132 static inline int bfin_pm_standby_setup(void)
133 {
134  return bfin_pm_standby_ctrl(1);
135 }
136 
137 static inline void bfin_pm_standby_restore(void)
138 {
139  bfin_pm_standby_ctrl(0);
140 }
141 
142 void bfin_gpio_pm_hibernate_restore(void);
143 void bfin_gpio_pm_hibernate_suspend(void);
144 void bfin_pint_suspend(void);
145 void bfin_pint_resume(void);
146 
147 # if !BFIN_GPIO_PINT
148 int gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl);
149 
150 struct gpio_port_s {
151  unsigned short data;
152  unsigned short maska;
153  unsigned short maskb;
154  unsigned short dir;
155  unsigned short polar;
156  unsigned short edge;
157  unsigned short both;
158  unsigned short inen;
159 
160  unsigned short fer;
161  unsigned short reserved;
162  unsigned short mux;
163 };
164 # endif
165 #endif /*CONFIG_PM*/
166 
167 /***********************************************************
168 *
169 * FUNCTIONS: Blackfin GPIO Driver
170 *
171 * INPUTS/OUTPUTS:
172 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
173 *
174 *
175 * DESCRIPTION: Blackfin GPIO Driver API
176 *
177 * CAUTION:
178 *************************************************************
179 * MODIFICATION HISTORY :
180 **************************************************************/
181 
182 int bfin_gpio_request(unsigned gpio, const char *label);
183 void bfin_gpio_free(unsigned gpio);
184 int bfin_gpio_irq_request(unsigned gpio, const char *label);
185 void bfin_gpio_irq_free(unsigned gpio);
186 int bfin_gpio_direction_input(unsigned gpio);
187 int bfin_gpio_direction_output(unsigned gpio, int value);
188 int bfin_gpio_get_value(unsigned gpio);
189 void bfin_gpio_set_value(unsigned gpio, int value);
190 
191 #include <asm/irq.h>
192 #include <asm/errno.h>
193 
194 #ifdef CONFIG_GPIOLIB
195 #include <asm-generic/gpio.h> /* cansleep wrappers */
196 
197 static inline int gpio_get_value(unsigned int gpio)
198 {
199  if (gpio < MAX_BLACKFIN_GPIOS)
200  return bfin_gpio_get_value(gpio);
201  else
202  return __gpio_get_value(gpio);
203 }
204 
205 static inline void gpio_set_value(unsigned int gpio, int value)
206 {
207  if (gpio < MAX_BLACKFIN_GPIOS)
208  bfin_gpio_set_value(gpio, value);
209  else
210  __gpio_set_value(gpio, value);
211 }
212 
213 static inline int gpio_cansleep(unsigned int gpio)
214 {
215  return __gpio_cansleep(gpio);
216 }
217 
218 static inline int gpio_to_irq(unsigned gpio)
219 {
220  return __gpio_to_irq(gpio);
221 }
222 
223 #else /* !CONFIG_GPIOLIB */
224 
225 static inline int gpio_request(unsigned gpio, const char *label)
226 {
227  return bfin_gpio_request(gpio, label);
228 }
229 
230 static inline void gpio_free(unsigned gpio)
231 {
232  return bfin_gpio_free(gpio);
233 }
234 
235 static inline int gpio_direction_input(unsigned gpio)
236 {
237  return bfin_gpio_direction_input(gpio);
238 }
239 
240 static inline int gpio_direction_output(unsigned gpio, int value)
241 {
242  return bfin_gpio_direction_output(gpio, value);
243 }
244 
245 static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
246 {
247  return -EINVAL;
248 }
249 
250 static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
251 {
252  int err;
253 
254  err = bfin_gpio_request(gpio, label);
255  if (err)
256  return err;
257 
258  if (flags & GPIOF_DIR_IN)
259  err = bfin_gpio_direction_input(gpio);
260  else
261  err = bfin_gpio_direction_output(gpio,
262  (flags & GPIOF_INIT_HIGH) ? 1 : 0);
263 
264  if (err)
265  bfin_gpio_free(gpio);
266 
267  return err;
268 }
269 
270 static inline int gpio_request_array(const struct gpio *array, size_t num)
271 {
272  int i, err;
273 
274  for (i = 0; i < num; i++, array++) {
275  err = gpio_request_one(array->gpio, array->flags, array->label);
276  if (err)
277  goto err_free;
278  }
279  return 0;
280 
281 err_free:
282  while (i--)
283  bfin_gpio_free((--array)->gpio);
284  return err;
285 }
286 
287 static inline void gpio_free_array(const struct gpio *array, size_t num)
288 {
289  while (num--)
290  bfin_gpio_free((array++)->gpio);
291 }
292 
293 static inline int __gpio_get_value(unsigned gpio)
294 {
295  return bfin_gpio_get_value(gpio);
296 }
297 
298 static inline void __gpio_set_value(unsigned gpio, int value)
299 {
300  return bfin_gpio_set_value(gpio, value);
301 }
302 
303 static inline int gpio_get_value(unsigned gpio)
304 {
305  return __gpio_get_value(gpio);
306 }
307 
308 static inline void gpio_set_value(unsigned gpio, int value)
309 {
310  return __gpio_set_value(gpio, value);
311 }
312 
313 static inline int gpio_to_irq(unsigned gpio)
314 {
315  if (likely(gpio < MAX_BLACKFIN_GPIOS))
316  return gpio + GPIO_IRQ_BASE;
317 
318  return -EINVAL;
319 }
320 
321 #include <asm-generic/gpio.h> /* cansleep wrappers */
322 #endif /* !CONFIG_GPIOLIB */
323 
324 static inline int irq_to_gpio(unsigned irq)
325 {
326  return (irq - GPIO_IRQ_BASE);
327 }
328 
329 #endif /* __ASSEMBLY__ */
330 
331 #endif /* __ARCH_BLACKFIN_GPIO_H__ */
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