C++ IOMUX_TO_IRQ函数代码示例

/*!
 * Invert the IOMUX/GPIO for SDHC1 SD1_DET.
 *
 * @param flag Flag represents whether the card is inserted/removed.
 *             Using this sensitive level of GPIO signal is changed.
 *
 **/
void sdhc_intr_clear(int flag)
{
	if (flag) {
		set_irq_type(IOMUX_TO_IRQ(PIN_GPIO37), IRQT_FALLING);
	} else {
		set_irq_type(IOMUX_TO_IRQ(PIN_GPIO37), IRQT_RISING);
	}
}

/*!
 * Invert the IOMUX/GPIO for SDHC1 SD1_DET.
 *
 * @param flag Flag represents whether the mmc card is inserted/removed.
 *             Using this sensitive level of GPIO signal is changed.
 *
 **/
void sdhc_intr_clear(int flag)
{
	if (flag) {
		set_irq_type(IOMUX_TO_IRQ(SP_SD2_DAT1), IRQT_FALLING);
	} else {
		set_irq_type(IOMUX_TO_IRQ(SP_SD2_DAT1), IRQT_RISING);
	}
}

static int mx31_3ds_sdhc1_init(struct device *dev,
			       irq_handler_t detect_irq,
			       void *data)
{
	int ret;

	ret = gpio_request_array(mx31_3ds_sdhc1_gpios,
				 ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
	if (ret) {
		pr_warning("Unable to request the SD/MMC GPIOs.\n");
		return ret;
	}

	ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_GPIO3_1),
			  detect_irq, IRQF_DISABLED |
			  IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
			  "sdhc1-detect", data);
	if (ret) {
		pr_warning("Unable to request the SD/MMC card-detect IRQ.\n");
		goto gpio_free;
	}

	return 0;

gpio_free:
	gpio_free_array(mx31_3ds_sdhc1_gpios,
			ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
	return ret;
}

static int pcm970_sdhc1_init(struct device *dev, irq_handler_t detect_irq,
		void *data)
{
	int ret;

	ret = gpio_request(SDHC1_GPIO_DET, "sdhc-detect");
	if (ret)
		return ret;

	gpio_direction_input(SDHC1_GPIO_DET);

#ifdef PCM970_SDHC_RW_SWITCH
	ret = gpio_request(SDHC1_GPIO_WP, "sdhc-wp");
	if (ret)
		goto err_gpio_free;
	gpio_direction_input(SDHC1_GPIO_WP);
#endif

	ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_SCK6), detect_irq,
			IRQF_DISABLED | IRQF_TRIGGER_FALLING,
				"sdhc-detect", data);
	if (ret)
		goto err_gpio_free_2;

	return 0;

err_gpio_free_2:
#ifdef PCM970_SDHC_RW_SWITCH
	gpio_free(SDHC1_GPIO_WP);
err_gpio_free:
#endif
	gpio_free(SDHC1_GPIO_DET);

	return ret;
}

/*!
 * zasevb_isp1301_bh()- call isp1301 bottom half handler
 * @param arg
 * This is a wrapper to the isp1301 bottom half handler, it
 * re-enables the gpio interrupt after processing complete.
 */
void *zasevb_isp1301_bh(void *arg)
{
        TRACE_MSG0(REMOVE_TCD, "ZASEVB GPIO INTERRUPT: ISP1301_BH");
        isp1301_bh(arg);
        TRACE_MSG0(REMOVE_TCD, "ZASEVB GPIO INTERRUPT: REENABLE");

        if (zasevb_int_disabled) {
                zasevb_int_disabled = FALSE;
                enable_irq(IOMUX_TO_IRQ(PIN_GPIO2));
        }
        return 0;
}

int mxc_iomux_gpio_isp1301_set (struct otg_instance *otg, int usb_mode)
{

        int gpio = 1;

        printk (KERN_INFO"MXC gpio setting for isp1301\n");

        isp1301_mod_init(otg, &zasevb_isp1301_bh);

        TRACE_MSG0(otg->tcd->TAG, "5. IOMUX and GPIO Interrupt Configuration");
        iomux_config_mux(PIN_GPIO2, OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);

        //Setting interrupt for ISP1301
        #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
        set_irq_type(IOMUX_TO_IRQ(PIN_GPIO2), IRQF_TRIGGER_FALLING);
        #else
        set_irq_type(IOMUX_TO_IRQ(PIN_GPIO2), IRQT_FALLING);
        #endif
        gpio = request_irq(IOMUX_TO_IRQ(PIN_GPIO2), zasevb_gpio_int_hndlr,
                        0, "ISP1301", (void *)&ocd_ops);
        THROW_IF(gpio, error);


        iomux_config_mux(PIN_USB_XRXD,  OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);
        iomux_config_mux(PIN_USB_VMOUT, OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);
        iomux_config_mux(PIN_USB_VPOUT, OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);
        iomux_config_mux(PIN_USB_VPIN,  OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);
        iomux_config_mux(PIN_USB_TXENB, OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);
        iomux_config_mux(PIN_USB_VMIN,  OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);



        CATCH(error) {
                printk(KERN_INFO"%s: failed\n", __FUNCTION__);
                UNLESS (gpio) gpio_free_irq (ZGPIO_PORT, ZGPIO_PIN, GPIO_HIGH_PRIO);
                return -EINVAL;
        }

        return 0;
}

/*!
 * Power Key initialization.
 */
static int __init mxc_init_power_key(void)
{
	/* Set power key as wakeup resource */
	int irq, ret;
	irq = IOMUX_TO_IRQ(MX51_PIN_EIM_A27);
	set_irq_type(irq, IRQF_TRIGGER_RISING);
	ret = request_irq(irq, power_key_int, 0, "power_key", 0);
	if (ret)
		pr_info("register on-off key interrupt failed\n");
	else
		enable_irq_wake(irq);
	return ret;
}

static int __init mxc_expio_init(void)
{
	int i;

	mx35_3stack_board_io = (u32) ioremap(BOARD_IO_ADDR, SZ_4K);
	if (mx35_3stack_board_io == 0)
		return -ENOMEM;

	if ((__raw_readw(mx35_3stack_board_io + MAGIC_NUMBER1_REG) != 0xAAAA) ||
	    (__raw_readw(mx35_3stack_board_io + MAGIC_NUMBER2_REG) != 0x5555))
		return -ENODEV;

	pr_info("3-Stack Debug board detected, rev = 0x%04X\n",
		readw(mx35_3stack_board_io + CPLD_CODE_VER_REG));

	/*
	 * Configure INT line as GPIO input
	 */
	mxc_request_iomux(EXPIO_PARENT_INT, MUX_CONFIG_FUNC);
	gpio_request(IOMUX_TO_GPIO(EXPIO_PARENT_INT), NULL);
	gpio_direction_input(IOMUX_TO_GPIO(EXPIO_PARENT_INT));

	/* disable the interrupt and clear the status */
	__raw_writew(0, mx35_3stack_board_io + INTR_MASK_REG);
	__raw_writew(0xFFFF, mx35_3stack_board_io + INTR_RESET_REG);
	__raw_writew(0, mx35_3stack_board_io + INTR_RESET_REG);
	__raw_writew(0x1F, mx35_3stack_board_io + INTR_MASK_REG);
	for (i = MXC_BOARD_IRQ_START; i < (MXC_BOARD_IRQ_START + MXC_BOARD_IRQS);
	     i++) {
		set_irq_chip(i, &expio_irq_chip);
		set_irq_handler(i, handle_level_irq);
		set_irq_flags(i, IRQF_VALID);
	}
	set_irq_type(IOMUX_TO_IRQ(EXPIO_PARENT_INT), IRQF_TRIGGER_LOW);
	set_irq_chained_handler(IOMUX_TO_IRQ(EXPIO_PARENT_INT),
				mxc_expio_irq_handler);
	return 0;
}

int volume_get_irq(int line_direction)
{
	iomux_pin_name_t gpio;
	int err = -1;

	switch (line_direction) {
	case 0: gpio = VOLUME_UP_gpio;
		break;
	case 1: gpio = VOLUME_DOWN_gpio;
		break;
	default: return err;
	}
	return IOMUX_TO_IRQ(gpio);
}

/*!
 * Setup the IOMUX/GPIO for SDHC1 SD1_DET.
 *
 * @param  host Pointer to MMC/SD host structure.
 * @param  handler      GPIO ISR function pointer for the GPIO signal.
 * @return The function returns 0 on success and -1 on failure.
 *
 **/
int sdhc_intr_setup(void *host,
		    irqreturn_t(*handler) (int, void *, struct pt_regs *))
{
	int ret;

	/* MMC1_SDDET is connected to GPIO37 */
	iomux_config_mux(PIN_GPIO37, OUTPUTCONFIG_FUNC, INPUTCONFIG_FUNC);

	/* check if a card in the slot if so we need to start with
	 * the proper edge definition
	 */
	sdhc_intr_clear(sdhc_find_card());

	ret = request_irq(IOMUX_TO_IRQ(PIN_GPIO37), handler, 0, "MXCMMC", host);
	return ret;
}

static int mxc_mmc1_init(struct device *dev,
			 irq_handler_t detect_irq, void *data)
{
	int ret;

	gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
	gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);

	mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
	mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
	mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
	mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
	mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
	mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);

	ret = gpio_request(gpio_det, "MMC detect");
	if (ret)
		return ret;

	ret = gpio_request(gpio_wp, "MMC w/p");
	if (ret)
		goto exit_free_det;

	gpio_direction_input(gpio_det);
	gpio_direction_input(gpio_wp);

	ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), detect_irq,
			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
			  "MMC detect", data);
	if (ret)
		goto exit_free_wp;

	return 0;

exit_free_wp:
	gpio_free(gpio_wp);

exit_free_det:
	gpio_free(gpio_det);

	return ret;
}

/*!
 * Setup the IOMUX/GPIO for SDHC1 SD1_DET.
 *
 * @param  host Pointer to MMC/SD host structure.
 * @param  handler      GPIO ISR function pointer for the GPIO signal.
 * @return The function returns 0 on success and -1 on failure.
 *
 **/
int sdhc_intr_setup(void *host,
		    irqreturn_t(*handler) (int, void *, struct pt_regs *))
{
	int ret;

	/* use SD2_DAT1 as GPIO for SD1_DET */
	iomux_config_mux(SP_SD2_DAT1, OUTPUTCONFIG_DEFAULT,
			 INPUTCONFIG_DEFAULT);

	/* check if a card in the slot if so we need to start with
	 * the proper edge definition
	 */
	sdhc_intr_clear(sdhc_find_card());

	ret = request_irq(IOMUX_TO_IRQ(SP_SD2_DAT1), handler,
			  0, "MXCMMC", host);
	return ret;
}

/*
 * Return the card detect pin.
 */
int sdhc_init_card_det(int id)
{
#if defined(GPIO_SDHC_ENABLE)
	if (id == 0) {
		int ret = 0;
		mxc_request_iomux(MX37_PIN_UART1_CTS, IOMUX_CONFIG_ALT4);
		mxc_iomux_set_pad(MX37_PIN_UART1_CTS, PAD_CTL_DRV_HIGH |
				  PAD_CTL_HYS_NONE | PAD_CTL_PKE_NONE | PAD_CTL_SRE_FAST);
		mxc_set_gpio_direction(MX37_PIN_UART1_CTS, 1);
		pr_info("[Henry/0206] SD detect pin initialized!!\n");
		ret = IOMUX_TO_IRQ(MX37_PIN_UART1_CTS);
		mxc_free_iomux(MX37_PIN_UART1_CTS, IOMUX_CONFIG_ALT4);
		return ret;
	} else {		/* config the det pin for SDHC2 */
		return 0;

	}
#endif
}

int fiveway_get_irq(int line_direction)
{
	iomux_pin_name_t gpio;
	int err = -1;

	switch (line_direction) {
	case 0: gpio = FIVEWAY_up_gpio;
		break;
	case 1: gpio = FIVEWAY_down_gpio;
		break;
	case 2: gpio = FIVEWAY_left_gpio;
		break;
	case 3: gpio = FIVEWAY_right_gpio;
		break;
	case 4: gpio = FIVEWAY_select_gpio;
		break;
	default: return err;
	}
	return IOMUX_TO_IRQ(gpio);
}

/*!
 * Power Key initialization.
 */
static int __init mxc_init_power_key(void)
{
	/*Set power key as wakeup resource */
	int irq, ret;

	mxc_request_iomux(MX25_PIN_A25, MUX_CONFIG_ALT5);
	mxc_iomux_set_pad(MX25_PIN_A25, PAD_CTL_DRV_NORMAL);
	gpio_request(IOMUX_TO_GPIO(MX25_PIN_A25), NULL);
	gpio_direction_input(IOMUX_TO_GPIO(MX25_PIN_A25));

	irq = IOMUX_TO_IRQ(MX25_PIN_A25);
	set_irq_type(irq, IRQF_TRIGGER_RISING);
	ret = request_irq(irq, power_key_int, 0, "power_key", 0);
	if (ret)
		pr_info("register on-off key interrupt failed\n");
	else
		enable_irq_wake(irq);

	return ret;
}