1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* linux/arch/arm/plat-s3c/include/plat/gpio-cfg-helper.h
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* S3C Platform - GPIO pin configuration helper definitions
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/* This is meant for core cpu support, machine or other driver files
* should not be including this header.
*/
#ifndef __PLAT_GPIO_CFG_HELPERS_H
#define __PLAT_GPIO_CFG_HELPERS_H __FILE__
/* As a note, all gpio configuration functions are entered exclusively, either
* with the relevant lock held or the system prevented from doing anything else
* by disabling interrupts.
*/
static inline int s3c_gpio_do_setcfg(struct s3c_gpio_chip *chip,
unsigned int off, unsigned int config)
{
return (chip->config->set_config)(chip, off, config);
}
static inline int s3c_gpio_do_setpull(struct s3c_gpio_chip *chip,
unsigned int off, s3c_gpio_pull_t pull)
{
return (chip->config->set_pull)(chip, off, pull);
}
/**
* s3c_gpio_setcfg_s3c24xx - S3C24XX style GPIO configuration.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @cfg: The configuration value to set.
*
* This helper deal with the GPIO cases where the control register
* has two bits of configuration per gpio, which have the following
* functions:
* 00 = input
* 01 = output
* 1x = special function
*/
extern int s3c_gpio_setcfg_s3c24xx(struct s3c_gpio_chip *chip,
unsigned int off, unsigned int cfg);
/**
* s3c_gpio_setcfg_s3c24xx_a - S3C24XX style GPIO configuration (Bank A)
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @cfg: The configuration value to set.
*
* This helper deal with the GPIO cases where the control register
* has one bit of configuration for the gpio, where setting the bit
* means the pin is in special function mode and unset means output.
*/
extern int s3c_gpio_setcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
unsigned int off, unsigned int cfg);
/**
* s3c_gpio_setcfg_s3c64xx_4bit - S3C64XX 4bit single register GPIO config.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @cfg: The configuration value to set.
*
* This helper deal with the GPIO cases where the control register has 4 bits
* of control per GPIO, generally in the form of:
* 0000 = Input
* 0001 = Output
* others = Special functions (dependant on bank)
*
* Note, since the code to deal with the case where there are two control
* registers instead of one, we do not have a separate set of functions for
* each case.
*/
extern int s3c_gpio_setcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
unsigned int off, unsigned int cfg);
/* Pull-{up,down} resistor controls.
*
* S3C2410,S3C2440,S3C24A0 = Pull-UP,
* S3C2412,S3C2413 = Pull-Down
* S3C6400,S3C6410 = Pull-Both [None,Down,Up,Undef]
* S3C2443 = Pull-Both [not same as S3C6400]
*/
/**
* s3c_gpio_setpull_1up() - Pull configuration for choice of up or none.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @param: pull: The pull mode being requested.
*
* This is a helper function for the case where we have GPIOs with one
* bit configuring the presence of a pull-up resistor.
*/
extern int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
unsigned int off, s3c_gpio_pull_t pull);
/**
* s3c_gpio_setpull_1down() - Pull configuration for choice of down or none
* @chip: The gpio chip that is being configured
* @off: The offset for the GPIO being configured
* @param: pull: The pull mode being requested
*
* This is a helper function for the case where we have GPIOs with one
* bit configuring the presence of a pull-down resistor.
*/
extern int s3c_gpio_setpull_1down(struct s3c_gpio_chip *chip,
unsigned int off, s3c_gpio_pull_t pull);
/**
* s3c_gpio_setpull_upown() - Pull configuration for choice of up, down or none
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @param: pull: The pull mode being requested.
*
* This is a helper function for the case where we have GPIOs with two
* bits configuring the presence of a pull resistor, in the following
* order:
* 00 = No pull resistor connected
* 01 = Pull-up resistor connected
* 10 = Pull-down resistor connected
*/
extern int s3c_gpio_setpull_updown(struct s3c_gpio_chip *chip,
unsigned int off, s3c_gpio_pull_t pull);
/**
* s3c_gpio_getpull_updown() - Get configuration for choice of up, down or none
* @chip: The gpio chip that the GPIO pin belongs to
* @off: The offset to the pin to get the configuration of.
*
* This helper function reads the state of the pull-{up,down} resistor for the
* given GPIO in the same case as s3c_gpio_setpull_upown.
*/
extern s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip,
unsigned int off);
/**
* s3c_gpio_setpull_s3c2443() - Pull configuration for s3c2443.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @param: pull: The pull mode being requested.
*
* This is a helper function for the case where we have GPIOs with two
* bits configuring the presence of a pull resistor, in the following
* order:
* 00 = Pull-up resistor connected
* 10 = Pull-down resistor connected
* x1 = No pull up resistor
*/
extern int s3c_gpio_setpull_s3c2443(struct s3c_gpio_chip *chip,
unsigned int off, s3c_gpio_pull_t pull);
/**
* s3c_gpio_getpull_s3c2443() - Get configuration for s3c2443 pull resistors
* @chip: The gpio chip that the GPIO pin belongs to.
* @off: The offset to the pin to get the configuration of.
*
* This helper function reads the state of the pull-{up,down} resistor for the
* given GPIO in the same case as s3c_gpio_setpull_upown.
*/
extern s3c_gpio_pull_t s3c_gpio_getpull_s3c24xx(struct s3c_gpio_chip *chip,
unsigned int off);
#endif /* __PLAT_GPIO_CFG_HELPERS_H */
|
