1 /* arch/arm/mach-s3c2410/include/mach/gpio-fns.h
2 *
3 * Copyright (c) 2003-2009 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * S3C2410 - hardware
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #ifndef __MACH_GPIO_FNS_H
14 #define __MACH_GPIO_FNS_H __FILE__
15
16 /* These functions are in the to-be-removed category and it is strongly
17 * encouraged not to use these in new code. They will be marked deprecated
18 * very soon.
19 *
20 * Most of the functionality can be either replaced by the gpiocfg calls
21 * for the s3c platform or by the generic GPIOlib API.
22 *
23 * As of 2.6.35-rc, these will be removed, with the few drivers using them
24 * either replaced or given a wrapper until the calls can be removed.
25 */
26
27 #include <plat/gpio-cfg.h>
28
s3c2410_gpio_cfgpin(unsigned int pin,unsigned int cfg)29 static inline void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int cfg)
30 {
31 /* 1:1 mapping between cfgpin and setcfg calls at the moment */
32 s3c_gpio_cfgpin(pin, cfg);
33 }
34
35 /* external functions for GPIO support
36 *
37 * These allow various different clients to access the same GPIO
38 * registers without conflicting. If your driver only owns the entire
39 * GPIO register, then it is safe to ioremap/__raw_{read|write} to it.
40 */
41
42 extern unsigned int s3c2410_gpio_getcfg(unsigned int pin);
43
44 /* s3c2410_gpio_getirq
45 *
46 * turn the given pin number into the corresponding IRQ number
47 *
48 * returns:
49 * < 0 = no interrupt for this pin
50 * >=0 = interrupt number for the pin
51 */
52
53 extern int s3c2410_gpio_getirq(unsigned int pin);
54
55 /* s3c2410_gpio_irqfilter
56 *
57 * set the irq filtering on the given pin
58 *
59 * on = 0 => disable filtering
60 * 1 => enable filtering
61 *
62 * config = S3C2410_EINTFLT_PCLK or S3C2410_EINTFLT_EXTCLK orred with
63 * width of filter (0 through 63)
64 *
65 *
66 */
67
68 extern int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
69 unsigned int config);
70
71 /* s3c2410_gpio_pullup
72 *
73 * This call should be replaced with s3c_gpio_setpull().
74 *
75 * As a note, there is currently no distinction between pull-up and pull-down
76 * in the s3c24xx series devices with only an on/off configuration.
77 */
78
79 /* s3c2410_gpio_pullup
80 *
81 * configure the pull-up control on the given pin
82 *
83 * to = 1 => disable the pull-up
84 * 0 => enable the pull-up
85 *
86 * eg;
87 *
88 * s3c2410_gpio_pullup(S3C2410_GPB(0), 0);
89 * s3c2410_gpio_pullup(S3C2410_GPE(8), 0);
90 */
91
92 extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to);
93
94 extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to);
95
96 extern unsigned int s3c2410_gpio_getpin(unsigned int pin);
97
98 #endif /* __MACH_GPIO_FNS_H */
99