Esempio n. 1
0
static u8 dht22_sun5i_read_bit() {
    if (dht22_sun5i_gpio_direction != PIN_DIR_IN) {
        dht22_sun5i_gpio_direction = PIN_DIR_IN;
        PIN_DIR(PIN_DIR_IN);
    }
    PIN_DIR(0);
    return PIN_GET();
}
Esempio n. 2
0
/* Init driver */
static int __init dht22_sun5i_init_driver() {
    int err = 0;
    int dht22_used = 0;
    script_gpio_set_t info;

    dht22_sun5i_proc = proc_mkdir("dht22", NULL);
    create_proc_read_entry("raw_data", 0444, dht22_sun5i_proc, dht22_sun5i_proc_read, NULL);

    err = script_parser_fetch("dht22_para", "dht22_used", &dht22_used, sizeof (dht22_used) / sizeof (int));
    if (!dht22_used || err) {
        printk(KERN_INFO "%s: dht22-bus is not used in config\n", __FUNCTION__);
        return -EINVAL;
    }

    err = script_parser_fetch("dht22_para", "dht22_pin", (int *) &info, sizeof (script_gpio_set_t));
    if (err) {
        printk(KERN_INFO "%s: can not get \"dht22_para\" \"dht22_pin\" gpio handler, already used by others?", __FUNCTION__);
        return -EBUSY;
    }
    dht22_sun5i_gpio_handler = gpio_request_ex("dht22_para", "dht22_pin");
    dht22_sun5i_gpio_direction = PIN_DIR_OUT;
    PIN_DIR(PIN_DIR_OUT);

    return 0;
}
Esempio n. 3
0
static void dht22_sun5i_write_bit(u8 bit) {
    if (dht22_sun5i_gpio_direction != PIN_DIR_OUT) {
        dht22_sun5i_gpio_direction = PIN_DIR_OUT;
        PIN_DIR(PIN_DIR_OUT);
    }
    PIN_SET(bit);
}
Esempio n. 4
0
File: pinmap.c Progetto: sg-/mbed-os
void pin_function(PinName pin, int function)
{
    uint32_t port = 0;
    uint8_t bit = 0;
    uint8_t i = 0;
    uint8_t func = 0;
    uint8_t dir = 0;

    // Assert that pin is valid
    MBED_ASSERT(pin != NC);

    // Calculate pin function and pin direction
    func = PIN_FUNC(function);
    dir  = PIN_DIR(function);
    // Calculate port and pin position
    port = PIN_PORT(pin);
    bit  = PIN_POS(pin);
    // Set function if function is in range
    if (func <= PIN_FUNC_MAX) {
        // Disable other functions
        for (i = 0; i < PIN_FUNC_MAX; i++) {
            if (i != (func - 1)) {
                GPIO_DisableFuncReg((GPIO_Port)port, i, (1 << bit));
            }
        }
        // Set pin function
        if (func) {
            GPIO_EnableFuncReg((GPIO_Port)port, (uint8_t)(func - 1), (1 << bit));
        }
    }

    // Set direction if direction is in range
    switch (dir) {
        case PIN_INPUT:
            GPIO_SetInputEnableReg((GPIO_Port)port, (1 << bit), ENABLE);
            GPIO_SetOutputEnableReg((GPIO_Port)port, (1 << bit), DISABLE);
            break;
        case PIN_OUTPUT:
            GPIO_SetOutputEnableReg((GPIO_Port)port, (1 << bit), ENABLE);
            GPIO_SetInputEnableReg((GPIO_Port)port, (1 << bit), DISABLE);
            break;
        case PIN_INOUT:
            GPIO_SetOutputEnableReg((GPIO_Port)port, (1 << bit), ENABLE);
            GPIO_SetInputEnableReg((GPIO_Port)port, (1 << bit), ENABLE);
            break;
        default:
            break;
    }
}
Esempio n. 5
0
/**
 * config_pin - configure a pin's mux attributes
 * @cfg: pin confguration
 *
 * Configures a pin's mode (alternate function or GPIO), its pull up status,
 * and its sleep mode based on the specified configuration.  The @cfg is
 * usually one of the SoC specific macros defined in mach/<soc>-pins.h.  These
 * are constructed using, and can be further enhanced with, the macros in
 * plat/pincfg.h.
 *
 * If a pin's mode is set to GPIO, it is configured as an input to avoid
 * side-effects.  The gpio can be manipulated later using standard GPIO API
 * calls.
 */
static void config_pin(pin_cfg_t cfg)
{
    int pin = PIN_NUM(cfg);
    int pull = PIN_PULL(cfg);
    int af = PIN_ALT(cfg);
    int output = PIN_DIR(cfg);
    int val = PIN_VAL(cfg);

    if (output)
        db8500_gpio_make_output(pin, val);
    else {
        db8500_gpio_make_input(pin);
        db8500_gpio_set_pull(pin, pull);
    }

    gpio_set_mode(pin, af);
}
Esempio n. 6
0
static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
			     pin_cfg_t cfg, bool sleep, unsigned int *slpmregs)
{
	static const char *afnames[] = {
		[NMK_GPIO_ALT_GPIO]	= "GPIO",
		[NMK_GPIO_ALT_A]	= "A",
		[NMK_GPIO_ALT_B]	= "B",
		[NMK_GPIO_ALT_C]	= "C"
	};
	static const char *pullnames[] = {
		[NMK_GPIO_PULL_NONE]	= "none",
		[NMK_GPIO_PULL_UP]	= "up",
		[NMK_GPIO_PULL_DOWN]	= "down",
		[3] /* illegal */	= "??"
	};
	static const char *slpmnames[] = {
		[NMK_GPIO_SLPM_INPUT]		= "input/wakeup",
		[NMK_GPIO_SLPM_NOCHANGE]	= "no-change/no-wakeup",
	};

	int pin = PIN_NUM(cfg);
	int pull = PIN_PULL(cfg);
	int af = PIN_ALT(cfg);
	int slpm = PIN_SLPM(cfg);
	int output = PIN_DIR(cfg);
	int val = PIN_VAL(cfg);
	bool glitch = af == NMK_GPIO_ALT_C;

	dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n",
		pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm],
		output ? "output " : "input",
		output ? (val ? "high" : "low") : "");

	if (sleep) {
		int slpm_pull = PIN_SLPM_PULL(cfg);
		int slpm_output = PIN_SLPM_DIR(cfg);
		int slpm_val = PIN_SLPM_VAL(cfg);

		af = NMK_GPIO_ALT_GPIO;

		/*
		 * The SLPM_* values are normal values + 1 to allow zero to
		 * mean "same as normal".
		 */
		if (slpm_pull)
			pull = slpm_pull - 1;
		if (slpm_output)
			output = slpm_output - 1;
		if (slpm_val)
			val = slpm_val - 1;

		dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
			pin,
			slpm_pull ? pullnames[pull] : "same",
			slpm_output ? (output ? "output" : "input") : "same",
			slpm_val ? (val ? "high" : "low") : "same");
	}

	if (output)
		__nmk_gpio_make_output(nmk_chip, offset, val);
	else {
		__nmk_gpio_make_input(nmk_chip, offset);
		__nmk_gpio_set_pull(nmk_chip, offset, pull);
	}

	__nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg));

	/*
	 * If the pin is switching to altfunc, and there was an interrupt
	 * installed on it which has been lazy disabled, actually mask the
	 * interrupt to prevent spurious interrupts that would occur while the
	 * pin is under control of the peripheral.  Only SKE does this.
	 */
	if (af != NMK_GPIO_ALT_GPIO)
		nmk_gpio_disable_lazy_irq(nmk_chip, offset);

	/*
	 * If we've backed up the SLPM registers (glitch workaround), modify
	 * the backups since they will be restored.
	 */
	if (slpmregs) {
		if (slpm == NMK_GPIO_SLPM_NOCHANGE)
			slpmregs[nmk_chip->bank] |= BIT(offset);
		else
			slpmregs[nmk_chip->bank] &= ~BIT(offset);
	} else
		__nmk_gpio_set_slpm(nmk_chip, offset, slpm);

	__nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch);
}
Esempio n. 7
0
int nmk_pin_config_set(struct pinctrl_dev *pctldev,
		       unsigned pin,
		       unsigned long config)
{
	static const char *pullnames[] = {
		[NMK_GPIO_PULL_NONE]	= "none",
		[NMK_GPIO_PULL_UP]	= "up",
		[NMK_GPIO_PULL_DOWN]	= "down",
		[3] /* illegal */	= "??"
	};
	static const char *slpmnames[] = {
		[NMK_GPIO_SLPM_INPUT]		= "input/wakeup",
		[NMK_GPIO_SLPM_NOCHANGE]	= "no-change/no-wakeup",
	};
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
	struct nmk_gpio_chip *nmk_chip;
	struct pinctrl_gpio_range *range;
	struct gpio_chip *chip;
	unsigned bit;

	/*
	 * The pin config contains pin number and altfunction fields, here
	 * we just ignore that part. It's being handled by the framework and
	 * pinmux callback respectively.
	 */
	pin_cfg_t cfg = (pin_cfg_t) config;
	int pull = PIN_PULL(cfg);
	int slpm = PIN_SLPM(cfg);
	int output = PIN_DIR(cfg);
	int val = PIN_VAL(cfg);
	bool lowemi = PIN_LOWEMI(cfg);
	bool gpiomode = PIN_GPIOMODE(cfg);
	bool sleep = PIN_SLEEPMODE(cfg);

	range = nmk_match_gpio_range(pctldev, pin);
	if (!range) {
		dev_err(npct->dev, "invalid pin offset %d\n", pin);
		return -EINVAL;
	}
	if (!range->gc) {
		dev_err(npct->dev, "GPIO chip missing in range for pin %d\n",
			pin);
		return -EINVAL;
	}
	chip = range->gc;
	nmk_chip = container_of(chip, struct nmk_gpio_chip, chip);

	if (sleep) {
		int slpm_pull = PIN_SLPM_PULL(cfg);
		int slpm_output = PIN_SLPM_DIR(cfg);
		int slpm_val = PIN_SLPM_VAL(cfg);

		/* All pins go into GPIO mode at sleep */
		gpiomode = true;

		/*
		 * The SLPM_* values are normal values + 1 to allow zero to
		 * mean "same as normal".
		 */
		if (slpm_pull)
			pull = slpm_pull - 1;
		if (slpm_output)
			output = slpm_output - 1;
		if (slpm_val)
			val = slpm_val - 1;

		dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
			pin,
			slpm_pull ? pullnames[pull] : "same",
			slpm_output ? (output ? "output" : "input") : "same",
			slpm_val ? (val ? "high" : "low") : "same");
	}

	dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n",
		pin, cfg, pullnames[pull], slpmnames[slpm],
		output ? "output " : "input",
		output ? (val ? "high" : "low") : "",
		lowemi ? "on" : "off" );

	clk_enable(nmk_chip->clk);
	bit = pin % NMK_GPIO_PER_CHIP;
	if (gpiomode)
		/* No glitch when going to GPIO mode */
		__nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
	if (output)
		__nmk_gpio_make_output(nmk_chip, bit, val);
	else {
		__nmk_gpio_make_input(nmk_chip, bit);
		__nmk_gpio_set_pull(nmk_chip, bit, pull);
	}
	/* TODO: isn't this only applicable on output pins? */
	__nmk_gpio_set_lowemi(nmk_chip, bit, lowemi);

	__nmk_gpio_set_slpm(nmk_chip, bit, slpm);
	clk_disable(nmk_chip->clk);
	return 0;
}
static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
			     pin_cfg_t cfg, bool sleep, unsigned int *slpmregs)
{
	static const char *afnames[] = {
		[NMK_GPIO_ALT_GPIO]	= "GPIO",
		[NMK_GPIO_ALT_A]	= "A",
		[NMK_GPIO_ALT_B]	= "B",
		[NMK_GPIO_ALT_C]	= "C"
	};
	static const char *pullnames[] = {
		[NMK_GPIO_PULL_NONE]	= "none",
		[NMK_GPIO_PULL_UP]	= "up",
		[NMK_GPIO_PULL_DOWN]	= "down",
		[3] /* illegal */	= "??"
	};
	static const char *slpmnames[] = {
		[NMK_GPIO_SLPM_INPUT]		= "input/wakeup",
		[NMK_GPIO_SLPM_NOCHANGE]	= "no-change/no-wakeup",
	};

	int pin = PIN_NUM(cfg);
	int pull = PIN_PULL(cfg);
	int af = PIN_ALT(cfg);
	int slpm = PIN_SLPM(cfg);
	int output = PIN_DIR(cfg);
	int val = PIN_VAL(cfg);
	bool glitch = af == NMK_GPIO_ALT_C;

	dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n",
		pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm],
		output ? "output " : "input",
		output ? (val ? "high" : "low") : "");

	if (sleep) {
		int slpm_pull = PIN_SLPM_PULL(cfg);
		int slpm_output = PIN_SLPM_DIR(cfg);
		int slpm_val = PIN_SLPM_VAL(cfg);

		af = NMK_GPIO_ALT_GPIO;

		/*
		 * The SLPM_* values are normal values + 1 to allow zero to
		 * mean "same as normal".
		 */
		if (slpm_pull)
			pull = slpm_pull - 1;
		if (slpm_output)
			output = slpm_output - 1;
		if (slpm_val)
			val = slpm_val - 1;

		dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
			pin,
			slpm_pull ? pullnames[pull] : "same",
			slpm_output ? (output ? "output" : "input") : "same",
			slpm_val ? (val ? "high" : "low") : "same");
	}

	if (output)
		__nmk_gpio_make_output(nmk_chip, offset, val);
	else {
		__nmk_gpio_make_input(nmk_chip, offset);
		__nmk_gpio_set_pull(nmk_chip, offset, pull);
	}

	/*
	 * If we've backed up the SLPM registers (glitch workaround), modify
	 * the backups since they will be restored.
	 */
	if (slpmregs) {
		if (slpm == NMK_GPIO_SLPM_NOCHANGE)
			slpmregs[nmk_chip->bank] |= BIT(offset);
		else
			slpmregs[nmk_chip->bank] &= ~BIT(offset);
	} else
		__nmk_gpio_set_slpm(nmk_chip, offset, slpm);

	__nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch);
}