projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| cf6c31fc | 89 | #ifndef CONFIG_GPIOLIB |
| b2dfaa8d GU |
90 | static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) |
| 91 | { | |
| 92 | int err; | |
| 93 | ||
| 94 | err = gpio_request(gpio, label); | |
| 95 | if (err) | |
| 96 | return err; | |
| 97 | ||
| 98 | if (flags & GPIOF_DIR_IN) | |
| 99 | err = gpio_direction_input(gpio); | |
| 100 | else | |
| 101 | err = gpio_direction_output(gpio, | |
| 102 | (flags & GPIOF_INIT_HIGH) ? 1 : 0); | |
| 103 | ||
| 104 | if (err) | |
| 105 | gpio_free(gpio); | |
| 106 | ||
| 107 | return err; | |
| 108 | } | |
| cf6c31fc | 109 | #endif /* !CONFIG_GPIOLIB */ |
| af39bb8b | 110 | #endif |