4  * SPDX-License-Identifier: Apache-2.0
12 #include <zephyr/dt-bindings/interrupt-controller/infineon-xmc4xxx-intc.h>
17 /* In Infineon XMC4XXX SoCs, gpio interrupts are triggered via an Event Request Unit (ERU) */
18 /* module. A subset of the GPIOs are connected to the ERU. The ERU monitors edge triggers */
24 /* unset on a negative edge (or vice-versa depending on the configuration). The value of */
28 /* The ERU configurations for supported port/pin combinations are stored in a devicetree file */
29 /* dts/arm/infineon/xmc4xxx_x_x-intc.dtsi. The configurations are stored in the opaque array */
30 /* uint16 port_line_mapping[]. The bitfields for the opaque entries are defined in */
31 /* dt-bindings/interrupt-controller/infineon-xmc4xxx-intc.h. */
56 				       enum gpio_int_trig trig,  in intc_xmc4xxx_gpio_enable_interrupt()  argument
60 	struct intc_xmc4xxx_data *data = dev->data;  in intc_xmc4xxx_gpio_enable_interrupt()
61 	const struct intc_xmc4xxx_config *config = dev->config;  in intc_xmc4xxx_gpio_enable_interrupt()
62 	int ret = -ENOTSUP;  in intc_xmc4xxx_gpio_enable_interrupt()
80 		cb = &data->cb[line];  in intc_xmc4xxx_gpio_enable_interrupt()
81 		if (cb->fn) {  in intc_xmc4xxx_gpio_enable_interrupt()
84 			ret = -EBUSY;  in intc_xmc4xxx_gpio_enable_interrupt()
91 		if (trig == GPIO_INT_TRIG_HIGH) {  in intc_xmc4xxx_gpio_enable_interrupt()
93 		} else if (trig == GPIO_INT_TRIG_LOW) {  in intc_xmc4xxx_gpio_enable_interrupt()
95 		} else if (trig == GPIO_INT_TRIG_BOTH) {  in intc_xmc4xxx_gpio_enable_interrupt()
98 			return -EINVAL;  in intc_xmc4xxx_gpio_enable_interrupt()
101 		cb->port_id = port_id;  in intc_xmc4xxx_gpio_enable_interrupt()
102 		cb->pin = pin;  in intc_xmc4xxx_gpio_enable_interrupt()
103 		cb->mode = mode;  in intc_xmc4xxx_gpio_enable_interrupt()
104 		cb->fn = fn;  in intc_xmc4xxx_gpio_enable_interrupt()
105 		cb->data = user_data;  in intc_xmc4xxx_gpio_enable_interrupt()
116 		eru = config->eru_regs[line >> 2];  in intc_xmc4xxx_gpio_enable_interrupt()
131 			if ((ret == 0 && trig == GPIO_INT_TRIG_LOW) ||  in intc_xmc4xxx_gpio_enable_interrupt()
132 			    (ret == 1 && trig == GPIO_INT_TRIG_HIGH)) {  in intc_xmc4xxx_gpio_enable_interrupt()
133 				eru->EXICON_b[eru_ch].FL = 1;  in intc_xmc4xxx_gpio_enable_interrupt()
147 	const struct intc_xmc4xxx_config *config = dev->config;  in intc_xmc4xxx_gpio_disable_interrupt()
148 	struct intc_xmc4xxx_data *data = dev->data;  in intc_xmc4xxx_gpio_disable_interrupt()
151 	for (int line = 0; line < ARRAY_SIZE(data->cb); line++) {  in intc_xmc4xxx_gpio_disable_interrupt()
154 		cb = &data->cb[line];  in intc_xmc4xxx_gpio_disable_interrupt()
156 		if (cb->fn && cb->port_id == port_id && cb->pin == pin) {  in intc_xmc4xxx_gpio_disable_interrupt()
157 			XMC_ERU_t *eru = config->eru_regs[line >> 2];  in intc_xmc4xxx_gpio_disable_interrupt()
159 			cb->fn = NULL;  in intc_xmc4xxx_gpio_disable_interrupt()
161 			eru->EXICON_b[eru_ch].PE = 0;  in intc_xmc4xxx_gpio_disable_interrupt()
163 			eru->EXICON_b[eru_ch].FL = 0;  in intc_xmc4xxx_gpio_disable_interrupt()
164 			/* no need to clear other variables in cb*/  in intc_xmc4xxx_gpio_disable_interrupt()
168 	return -EINVAL;  in intc_xmc4xxx_gpio_disable_interrupt()
175 	struct intc_xmc4xxx_data *data = dev->data;  in intc_xmc4xxx_isr()
176 	const struct intc_xmc4xxx_config *config = dev->config;  in intc_xmc4xxx_isr()
177 	struct isr_cb *cb = &data->cb[line];  in intc_xmc4xxx_isr()
178 	XMC_ERU_t *eru = config->eru_regs[line >> 2];  in intc_xmc4xxx_isr()
181 	/* The callback function may actually disable the interrupt and set cb->fn = NULL */  in intc_xmc4xxx_isr()
182 	/* as is done in tests/drivers/gpio/gpio_api_1pin. Assume that the callback function */  in intc_xmc4xxx_isr()
184 	/* in the same callback which could potentially set cb->fn again. */  in intc_xmc4xxx_isr()
185 	while (cb->fn) {  in intc_xmc4xxx_isr()
186 		cb->fn(cb->data, cb->pin);  in intc_xmc4xxx_isr()
188 		if (cb->mode == GPIO_INT_MODE_LEVEL && eru->EXICON_b[eru_ch].FL == 1) {  in intc_xmc4xxx_isr()
204 	/* connect irqs only if they defined by name in the dts */  in intc_xmc4xxx_init()