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Commit | Line | Data |
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af39bb8b | 1 | /* |
2 | * Coldfire generic GPIO support | |
3 | * | |
4 | * (C) Copyright 2009, Steven King <sfking@fdwdc.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License. | |
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 coldfire_gpio_h | |
17 | #define coldfire_gpio_h | |
18 | ||
19 | #include <linux/io.h> | |
af39bb8b | 20 | #include <asm/coldfire.h> |
21 | #include <asm/mcfsim.h> | |
eac57949 | 22 | #include <asm/mcfgpio.h> |
af39bb8b | 23 | /* |
24 | * The Generic GPIO functions | |
25 | * | |
26 | * If the gpio is a compile time constant and is one of the Coldfire gpios, | |
27 | * use the inline version, otherwise dispatch thru gpiolib. | |
28 | */ | |
29 | ||
30 | static inline int gpio_get_value(unsigned gpio) | |
31 | { | |
32 | if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) | |
eac57949 | 33 | return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio); |
af39bb8b | 34 | else |
35 | return __gpio_get_value(gpio); | |
36 | } | |
37 | ||
38 | static inline void gpio_set_value(unsigned gpio, int value) | |
39 | { | |
40 | if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) { | |
41 | if (gpio < MCFGPIO_SCR_START) { | |
42 | unsigned long flags; | |
43 | MCFGPIO_PORTTYPE data; | |
44 | ||
45 | local_irq_save(flags); | |
eac57949 | 46 | data = mcfgpio_read(__mcfgpio_podr(gpio)); |
af39bb8b | 47 | if (value) |
48 | data |= mcfgpio_bit(gpio); | |
49 | else | |
50 | data &= ~mcfgpio_bit(gpio); | |
eac57949 | 51 | mcfgpio_write(data, __mcfgpio_podr(gpio)); |
af39bb8b | 52 | local_irq_restore(flags); |
53 | } else { | |
54 | if (value) | |
55 | mcfgpio_write(mcfgpio_bit(gpio), | |
56 | MCFGPIO_SETR_PORT(gpio)); | |
57 | else | |
58 | mcfgpio_write(~mcfgpio_bit(gpio), | |
59 | MCFGPIO_CLRR_PORT(gpio)); | |
60 | } | |
61 | } else | |
62 | __gpio_set_value(gpio, value); | |
63 | } | |
64 | ||
65 | static inline int gpio_to_irq(unsigned gpio) | |
66 | { | |
bea8bcb1 SK |
67 | #if defined(MCFGPIO_IRQ_MIN) |
68 | if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX)) | |
69 | #else | |
70 | if (gpio < MCFGPIO_IRQ_MAX) | |
71 | #endif | |
72 | return gpio + MCFGPIO_IRQ_VECBASE; | |
73 | else | |
74 | return __gpio_to_irq(gpio); | |
af39bb8b | 75 | } |
76 | ||
77 | static inline int irq_to_gpio(unsigned irq) | |
78 | { | |
79 | return (irq >= MCFGPIO_IRQ_VECBASE && | |
80 | irq < (MCFGPIO_IRQ_VECBASE + MCFGPIO_IRQ_MAX)) ? | |
81 | irq - MCFGPIO_IRQ_VECBASE : -ENXIO; | |
82 | } | |
83 | ||
84 | static inline int gpio_cansleep(unsigned gpio) | |
85 | { | |
86 | return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio); | |
87 | } | |
88 | ||
89 | #endif |