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-rw-r--r--include/asm-arm/arch-davinci/gpio.h159
1 files changed, 0 insertions, 159 deletions
diff --git a/include/asm-arm/arch-davinci/gpio.h b/include/asm-arm/arch-davinci/gpio.h
deleted file mode 100644
index ff8de30b2fb3..000000000000
--- a/include/asm-arm/arch-davinci/gpio.h
+++ /dev/null
@@ -1,159 +0,0 @@
1/*
2 * TI DaVinci GPIO Support
3 *
4 * Copyright (c) 2006 David Brownell
5 * Copyright (c) 2007, MontaVista Software, Inc. <source@mvista.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13#ifndef __DAVINCI_GPIO_H
14#define __DAVINCI_GPIO_H
15
16#include <linux/io.h>
17#include <asm/hardware.h>
18
19/*
20 * basic gpio routines
21 *
22 * board-specific init should be done by arch/.../.../board-XXX.c (maybe
23 * initializing banks together) rather than boot loaders; kexec() won't
24 * go through boot loaders.
25 *
26 * the gpio clock will be turned on when gpios are used, and you may also
27 * need to pay attention to PINMUX0 and PINMUX1 to be sure those pins are
28 * used as gpios, not with other peripherals.
29 *
30 * GPIOs are numbered 0..(DAVINCI_N_GPIO-1). For documentation, and maybe
31 * for later updates, code should write GPIO(N) or:
32 * - GPIOV18(N) for 1.8V pins, N in 0..53; same as GPIO(0)..GPIO(53)
33 * - GPIOV33(N) for 3.3V pins, N in 0..17; same as GPIO(54)..GPIO(70)
34 *
35 * For GPIO IRQs use gpio_to_irq(GPIO(N)) or gpio_to_irq(GPIOV33(N)) etc
36 * for now, that's != GPIO(N)
37 */
38#define GPIO(X) (X) /* 0 <= X <= 70 */
39#define GPIOV18(X) (X) /* 1.8V i/o; 0 <= X <= 53 */
40#define GPIOV33(X) ((X)+54) /* 3.3V i/o; 0 <= X <= 17 */
41
42struct gpio_controller {
43 u32 dir;
44 u32 out_data;
45 u32 set_data;
46 u32 clr_data;
47 u32 in_data;
48 u32 set_rising;
49 u32 clr_rising;
50 u32 set_falling;
51 u32 clr_falling;
52 u32 intstat;
53};
54
55/* The __gpio_to_controller() and __gpio_mask() functions inline to constants
56 * with constant parameters; or in outlined code they execute at runtime.
57 *
58 * You'd access the controller directly when reading or writing more than
59 * one gpio value at a time, and to support wired logic where the value
60 * being driven by the cpu need not match the value read back.
61 *
62 * These are NOT part of the cross-platform GPIO interface
63 */
64static inline struct gpio_controller *__iomem
65__gpio_to_controller(unsigned gpio)
66{
67 void *__iomem ptr;
68
69 if (gpio < 32)
70 ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x10);
71 else if (gpio < 64)
72 ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x38);
73 else if (gpio < DAVINCI_N_GPIO)
74 ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x60);
75 else
76 ptr = NULL;
77 return ptr;
78}
79
80static inline u32 __gpio_mask(unsigned gpio)
81{
82 return 1 << (gpio % 32);
83}
84
85/* The get/set/clear functions will inline when called with constant
86 * parameters, for low-overhead bitbanging. Illegal constant parameters
87 * cause link-time errors.
88 *
89 * Otherwise, calls with variable parameters use outlined functions.
90 */
91extern int __error_inval_gpio(void);
92
93extern void __gpio_set(unsigned gpio, int value);
94extern int __gpio_get(unsigned gpio);
95
96static inline void gpio_set_value(unsigned gpio, int value)
97{
98 if (__builtin_constant_p(value)) {
99 struct gpio_controller *__iomem g;
100 u32 mask;
101
102 if (gpio >= DAVINCI_N_GPIO)
103 __error_inval_gpio();
104
105 g = __gpio_to_controller(gpio);
106 mask = __gpio_mask(gpio);
107 if (value)
108 __raw_writel(mask, &g->set_data);
109 else
110 __raw_writel(mask, &g->clr_data);
111 return;
112 }
113
114 __gpio_set(gpio, value);
115}
116
117/* Returns zero or nonzero; works for gpios configured as inputs OR
118 * as outputs.
119 *
120 * NOTE: changes in reported values are synchronized to the GPIO clock.
121 * This is most easily seen after calling gpio_set_value() and then immediatly
122 * gpio_get_value(), where the gpio_get_value() would return the old value
123 * until the GPIO clock ticks and the new value gets latched.
124 */
125
126static inline int gpio_get_value(unsigned gpio)
127{
128 struct gpio_controller *__iomem g;
129
130 if (!__builtin_constant_p(gpio))
131 return __gpio_get(gpio);
132
133 if (gpio >= DAVINCI_N_GPIO)
134 return __error_inval_gpio();
135
136 g = __gpio_to_controller(gpio);
137 return !!(__gpio_mask(gpio) & __raw_readl(&g->in_data));
138}
139
140/* powerup default direction is IN */
141extern int gpio_direction_input(unsigned gpio);
142extern int gpio_direction_output(unsigned gpio, int value);
143
144#include <asm-generic/gpio.h> /* cansleep wrappers */
145
146extern int gpio_request(unsigned gpio, const char *tag);
147extern void gpio_free(unsigned gpio);
148
149static inline int gpio_to_irq(unsigned gpio)
150{
151 return DAVINCI_N_AINTC_IRQ + gpio;
152}
153
154static inline int irq_to_gpio(unsigned irq)
155{
156 return irq - DAVINCI_N_AINTC_IRQ;
157}
158
159#endif /* __DAVINCI_GPIO_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 23:09:35 -0500