aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-msm/gpio.c85
-rw-r--r--arch/arm/mach-msm/include/mach/gpio.h142
2 files changed, 227 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/gpio.c b/arch/arm/mach-msm/gpio.c
new file mode 100644
index 000000000000..bc32c845c7b0
--- /dev/null
+++ b/arch/arm/mach-msm/gpio.c
@@ -0,0 +1,85 @@
1/* linux/arch/arm/mach-msm/gpio.c
2 *
3 * Copyright (C) 2007 Google, Inc.
4 * Copyright (c) 2009, Code Aurora Forum. All rights reserved.
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 */
16
17#include <linux/module.h>
18#include <mach/gpio.h>
19#include "proc_comm.h"
20
21int gpio_tlmm_config(unsigned config, unsigned disable)
22{
23 return msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &config, &disable);
24}
25EXPORT_SYMBOL(gpio_tlmm_config);
26
27int msm_gpios_enable(const struct msm_gpio *table, int size)
28{
29 int rc;
30 int i;
31 const struct msm_gpio *g;
32 for (i = 0; i < size; i++) {
33 g = table + i;
34 rc = gpio_tlmm_config(g->gpio_cfg, GPIO_ENABLE);
35 if (rc) {
36 pr_err("gpio_tlmm_config(0x%08x, GPIO_ENABLE)"
37 " <%s> failed: %d\n",
38 g->gpio_cfg, g->label ?: "?", rc);
39 pr_err("pin %d func %d dir %d pull %d drvstr %d\n",
40 GPIO_PIN(g->gpio_cfg), GPIO_FUNC(g->gpio_cfg),
41 GPIO_DIR(g->gpio_cfg), GPIO_PULL(g->gpio_cfg),
42 GPIO_DRVSTR(g->gpio_cfg));
43 goto err;
44 }
45 }
46 return 0;
47err:
48 msm_gpios_disable(table, i);
49 return rc;
50}
51EXPORT_SYMBOL(msm_gpios_enable);
52
53void msm_gpios_disable(const struct msm_gpio *table, int size)
54{
55 int rc;
56 int i;
57 const struct msm_gpio *g;
58 for (i = size-1; i >= 0; i--) {
59 g = table + i;
60 rc = gpio_tlmm_config(g->gpio_cfg, GPIO_DISABLE);
61 if (rc) {
62 pr_err("gpio_tlmm_config(0x%08x, GPIO_DISABLE)"
63 " <%s> failed: %d\n",
64 g->gpio_cfg, g->label ?: "?", rc);
65 pr_err("pin %d func %d dir %d pull %d drvstr %d\n",
66 GPIO_PIN(g->gpio_cfg), GPIO_FUNC(g->gpio_cfg),
67 GPIO_DIR(g->gpio_cfg), GPIO_PULL(g->gpio_cfg),
68 GPIO_DRVSTR(g->gpio_cfg));
69 }
70 }
71}
72EXPORT_SYMBOL(msm_gpios_disable);
73
74int msm_gpios_request_enable(const struct msm_gpio *table, int size)
75{
76 int rc = msm_gpios_enable(table, size);
77 return rc;
78}
79EXPORT_SYMBOL(msm_gpios_request_enable);
80
81void msm_gpios_disable_free(const struct msm_gpio *table, int size)
82{
83 msm_gpios_disable(table, size);
84}
85EXPORT_SYMBOL(msm_gpios_disable_free);
diff --git a/arch/arm/mach-msm/include/mach/gpio.h b/arch/arm/mach-msm/include/mach/gpio.h
new file mode 100644
index 000000000000..262b441b4374
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/gpio.h
@@ -0,0 +1,142 @@
1/*
2 * Copyright (C) 2007 Google, Inc.
3 * Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
4 * Author: Mike Lockwood <lockwood@android.com>
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 */
16#ifndef __ASM_ARCH_MSM_GPIO_H
17#define __ASM_ARCH_MSM_GPIO_H
18
19/**
20 * struct msm_gpio - GPIO pin description
21 * @gpio_cfg - configuration bitmap, as per gpio_tlmm_config()
22 * @label - textual label
23 *
24 * Usually, GPIO's are operated by sets.
25 * This struct accumulate all GPIO information in single source
26 * and facilitete group operations provided by msm_gpios_xxx()
27 */
28struct msm_gpio {
29 u32 gpio_cfg;
30 const char *label;
31};
32
33/**
34 * msm_gpios_request_enable() - request and enable set of GPIOs
35 *
36 * Request and configure set of GPIO's
37 * In case of error, all operations rolled back.
38 * Return error code.
39 *
40 * @table: GPIO table
41 * @size: number of entries in @table
42 */
43int msm_gpios_request_enable(const struct msm_gpio *table, int size);
44
45/**
46 * msm_gpios_disable_free() - disable and free set of GPIOs
47 *
48 * @table: GPIO table
49 * @size: number of entries in @table
50 */
51void msm_gpios_disable_free(const struct msm_gpio *table, int size);
52
53/**
54 * msm_gpios_request() - request set of GPIOs
55 * In case of error, all operations rolled back.
56 * Return error code.
57 *
58 * @table: GPIO table
59 * @size: number of entries in @table
60 */
61int msm_gpios_request(const struct msm_gpio *table, int size);
62
63/**
64 * msm_gpios_free() - free set of GPIOs
65 *
66 * @table: GPIO table
67 * @size: number of entries in @table
68 */
69void msm_gpios_free(const struct msm_gpio *table, int size);
70
71/**
72 * msm_gpios_enable() - enable set of GPIOs
73 * In case of error, all operations rolled back.
74 * Return error code.
75 *
76 * @table: GPIO table
77 * @size: number of entries in @table
78 */
79int msm_gpios_enable(const struct msm_gpio *table, int size);
80
81/**
82 * msm_gpios_disable() - disable set of GPIOs
83 *
84 * @table: GPIO table
85 * @size: number of entries in @table
86 */
87void msm_gpios_disable(const struct msm_gpio *table, int size);
88
89/* GPIO TLMM (Top Level Multiplexing) Definitions */
90
91/* GPIO TLMM: Function -- GPIO specific */
92
93/* GPIO TLMM: Direction */
94enum {
95 GPIO_INPUT,
96 GPIO_OUTPUT,
97};
98
99/* GPIO TLMM: Pullup/Pulldown */
100enum {
101 GPIO_NO_PULL,
102 GPIO_PULL_DOWN,
103 GPIO_KEEPER,
104 GPIO_PULL_UP,
105};
106
107/* GPIO TLMM: Drive Strength */
108enum {
109 GPIO_2MA,
110 GPIO_4MA,
111 GPIO_6MA,
112 GPIO_8MA,
113 GPIO_10MA,
114 GPIO_12MA,
115 GPIO_14MA,
116 GPIO_16MA,
117};
118
119enum {
120 GPIO_ENABLE,
121 GPIO_DISABLE,
122};
123
124#define GPIO_CFG(gpio, func, dir, pull, drvstr) \
125 ((((gpio) & 0x3FF) << 4) | \
126 ((func) & 0xf) | \
127 (((dir) & 0x1) << 14) | \
128 (((pull) & 0x3) << 15) | \
129 (((drvstr) & 0xF) << 17))
130
131/**
132 * extract GPIO pin from bit-field used for gpio_tlmm_config
133 */
134#define GPIO_PIN(gpio_cfg) (((gpio_cfg) >> 4) & 0x3ff)
135#define GPIO_FUNC(gpio_cfg) (((gpio_cfg) >> 0) & 0xf)
136#define GPIO_DIR(gpio_cfg) (((gpio_cfg) >> 14) & 0x1)
137#define GPIO_PULL(gpio_cfg) (((gpio_cfg) >> 15) & 0x3)
138#define GPIO_DRVSTR(gpio_cfg) (((gpio_cfg) >> 17) & 0xf)
139
140int gpio_tlmm_config(unsigned config, unsigned disable);
141
142#endif /* __ASM_ARCH_MSM_GPIO_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 05:16:25 -0500