1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Coldfire generic GPIO support
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * (C) Copyright 2009, Steven King <sfking@fdwdc.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef coldfire_gpio_h
9*4882a593Smuzhiyun #define coldfire_gpio_h
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/io.h>
12*4882a593Smuzhiyun #include <asm/coldfire.h>
13*4882a593Smuzhiyun #include <asm/mcfsim.h>
14*4882a593Smuzhiyun #include <asm/mcfgpio.h>
15*4882a593Smuzhiyun /*
16*4882a593Smuzhiyun * The Generic GPIO functions
17*4882a593Smuzhiyun *
18*4882a593Smuzhiyun * If the gpio is a compile time constant and is one of the Coldfire gpios,
19*4882a593Smuzhiyun * use the inline version, otherwise dispatch thru gpiolib.
20*4882a593Smuzhiyun */
21*4882a593Smuzhiyun
gpio_get_value(unsigned gpio)22*4882a593Smuzhiyun static inline int gpio_get_value(unsigned gpio)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX)
25*4882a593Smuzhiyun return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio);
26*4882a593Smuzhiyun else
27*4882a593Smuzhiyun return __gpio_get_value(gpio);
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
gpio_set_value(unsigned gpio,int value)30*4882a593Smuzhiyun static inline void gpio_set_value(unsigned gpio, int value)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) {
33*4882a593Smuzhiyun if (gpio < MCFGPIO_SCR_START) {
34*4882a593Smuzhiyun unsigned long flags;
35*4882a593Smuzhiyun MCFGPIO_PORTTYPE data;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun local_irq_save(flags);
38*4882a593Smuzhiyun data = mcfgpio_read(__mcfgpio_podr(gpio));
39*4882a593Smuzhiyun if (value)
40*4882a593Smuzhiyun data |= mcfgpio_bit(gpio);
41*4882a593Smuzhiyun else
42*4882a593Smuzhiyun data &= ~mcfgpio_bit(gpio);
43*4882a593Smuzhiyun mcfgpio_write(data, __mcfgpio_podr(gpio));
44*4882a593Smuzhiyun local_irq_restore(flags);
45*4882a593Smuzhiyun } else {
46*4882a593Smuzhiyun if (value)
47*4882a593Smuzhiyun mcfgpio_write(mcfgpio_bit(gpio),
48*4882a593Smuzhiyun MCFGPIO_SETR_PORT(gpio));
49*4882a593Smuzhiyun else
50*4882a593Smuzhiyun mcfgpio_write(~mcfgpio_bit(gpio),
51*4882a593Smuzhiyun MCFGPIO_CLRR_PORT(gpio));
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun } else
54*4882a593Smuzhiyun __gpio_set_value(gpio, value);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
gpio_to_irq(unsigned gpio)57*4882a593Smuzhiyun static inline int gpio_to_irq(unsigned gpio)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun #if defined(MCFGPIO_IRQ_MIN)
60*4882a593Smuzhiyun if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX))
61*4882a593Smuzhiyun #else
62*4882a593Smuzhiyun if (gpio < MCFGPIO_IRQ_MAX)
63*4882a593Smuzhiyun #endif
64*4882a593Smuzhiyun return gpio + MCFGPIO_IRQ_VECBASE;
65*4882a593Smuzhiyun else
66*4882a593Smuzhiyun return __gpio_to_irq(gpio);
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
irq_to_gpio(unsigned irq)69*4882a593Smuzhiyun static inline int irq_to_gpio(unsigned irq)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun return (irq >= MCFGPIO_IRQ_VECBASE &&
72*4882a593Smuzhiyun irq < (MCFGPIO_IRQ_VECBASE + MCFGPIO_IRQ_MAX)) ?
73*4882a593Smuzhiyun irq - MCFGPIO_IRQ_VECBASE : -ENXIO;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
gpio_cansleep(unsigned gpio)76*4882a593Smuzhiyun static inline int gpio_cansleep(unsigned gpio)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun #ifndef CONFIG_GPIOLIB
gpio_request_one(unsigned gpio,unsigned long flags,const char * label)82*4882a593Smuzhiyun static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun int err;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun err = gpio_request(gpio, label);
87*4882a593Smuzhiyun if (err)
88*4882a593Smuzhiyun return err;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun if (flags & GPIOF_DIR_IN)
91*4882a593Smuzhiyun err = gpio_direction_input(gpio);
92*4882a593Smuzhiyun else
93*4882a593Smuzhiyun err = gpio_direction_output(gpio,
94*4882a593Smuzhiyun (flags & GPIOF_INIT_HIGH) ? 1 : 0);
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun if (err)
97*4882a593Smuzhiyun gpio_free(gpio);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun return err;
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun #endif /* !CONFIG_GPIOLIB */
102*4882a593Smuzhiyun #endif
103