1 /*
2 * Copyright (c) 2023 ENE Technology Inc.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT ene_kb1200_gpio
8
9 #include <zephyr/drivers/gpio.h>
10 #include <zephyr/kernel.h>
11 #include <zephyr/drivers/gpio/gpio_utils.h>
12 #include <zephyr/sys/util_macro.h>
13 #include <zephyr/dt-bindings/gpio/ene-kb1200-gpio.h>
14 #include <reg/gpio.h>
15 #include <reg/gptd.h>
16
17 struct gpio_kb1200_data {
18 /* gpio_driver_data needs to be first */
19 struct gpio_driver_data common;
20 sys_slist_t cb;
21 };
22
23 struct gpio_kb1200_config {
24 /* gpio_driver_config needs to be first */
25 struct gpio_driver_config common;
26 /* base address of GPIO port */
27 struct gpio_regs *gpio_regs;
28 struct gptd_regs *gptd_regs;
29 };
30
gpio_kb1200_isr(const struct device * dev)31 static void gpio_kb1200_isr(const struct device *dev)
32 {
33 const struct gpio_kb1200_config *config = dev->config;
34 struct gpio_kb1200_data *context = dev->data;
35 uint32_t pending_flag = config->gptd_regs->GPTDPF;
36
37 gpio_fire_callbacks(&context->cb, dev, pending_flag);
38 config->gptd_regs->GPTDPF |= pending_flag;
39 }
40
kb1200_gpio_pin_configure(const struct device * dev,gpio_pin_t pin,gpio_flags_t flags)41 static int kb1200_gpio_pin_configure(const struct device *dev, gpio_pin_t pin, gpio_flags_t flags)
42 {
43 const struct gpio_kb1200_config *config = dev->config;
44
45 WRITE_BIT(config->gpio_regs->GPIOFS, pin, 0);
46 /* ene specific flags. low voltage mode,input voltage threshold (ViH & ViL) support 1.8V */
47 if (flags & KB1200_GPIO_VOLTAGE_POS) {
48 WRITE_BIT(config->gpio_regs->GPIOLV, pin, 1);
49 } else {
50 WRITE_BIT(config->gpio_regs->GPIOLV, pin, 0);
51 }
52 /* ene specific flags. max current driving ability, max support 16 mA */
53 if (flags & KB1200_GPIO_DRIVING_16MA) {
54 WRITE_BIT(config->gpio_regs->GPIODC, pin, 1);
55 } else {
56 WRITE_BIT(config->gpio_regs->GPIODC, pin, 0);
57 }
58 /* pull-up function */
59 if (flags & GPIO_PULL_UP) {
60 WRITE_BIT(config->gpio_regs->GPIOPU, pin, 1);
61 } else {
62 WRITE_BIT(config->gpio_regs->GPIOPU, pin, 0);
63 }
64 /* output data high/low */
65 if (flags & GPIO_OUTPUT_INIT_HIGH) {
66 WRITE_BIT(config->gpio_regs->GPIOD, pin, 1);
67 } else if (flags & GPIO_OUTPUT_INIT_LOW) {
68 WRITE_BIT(config->gpio_regs->GPIOD, pin, 0);
69 }
70 /* output enable function */
71 if (flags & GPIO_OUTPUT) {
72 /* setting open-drain only when output is enabled */
73 /* output type push-pull/open-drain */
74 if (flags & GPIO_SINGLE_ENDED) {
75 if (flags & GPIO_LINE_OPEN_DRAIN) {
76 WRITE_BIT(config->gpio_regs->GPIOOD, pin, 1);
77 } else {
78 WRITE_BIT(config->gpio_regs->GPIOOD, pin, 0);
79 }
80 } else {
81 WRITE_BIT(config->gpio_regs->GPIOOD, pin, 0);
82 }
83 WRITE_BIT(config->gpio_regs->GPIOOE, pin, 1);
84 } else {
85 WRITE_BIT(config->gpio_regs->GPIOOE, pin, 0);
86 /* disable open-drain when output is disabled */
87 WRITE_BIT(config->gpio_regs->GPIOOD, pin, 0);
88 }
89 /* input function always enable */
90 WRITE_BIT(config->gpio_regs->GPIOIE, pin, 1);
91 return 0;
92 }
93
kb1200_gpio_port_get_raw(const struct device * dev,gpio_port_value_t * value)94 static int kb1200_gpio_port_get_raw(const struct device *dev, gpio_port_value_t *value)
95 {
96 const struct gpio_kb1200_config *config = dev->config;
97
98 *value = config->gpio_regs->GPIOIN;
99 return 0;
100 }
101
kb1200_gpio_port_set_masked_raw(const struct device * dev,gpio_port_pins_t mask,gpio_port_value_t value)102 static int kb1200_gpio_port_set_masked_raw(const struct device *dev, gpio_port_pins_t mask,
103 gpio_port_value_t value)
104 {
105 const struct gpio_kb1200_config *config = dev->config;
106
107 config->gpio_regs->GPIOD |= (value & mask);
108 return 0;
109 }
110
kb1200_gpio_port_set_bits_raw(const struct device * dev,gpio_port_pins_t pins)111 static int kb1200_gpio_port_set_bits_raw(const struct device *dev, gpio_port_pins_t pins)
112 {
113 const struct gpio_kb1200_config *config = dev->config;
114
115 config->gpio_regs->GPIOD |= pins;
116 return 0;
117 }
118
kb1200_gpio_port_clear_bits_raw(const struct device * dev,gpio_port_pins_t pins)119 static int kb1200_gpio_port_clear_bits_raw(const struct device *dev, gpio_port_pins_t pins)
120 {
121 const struct gpio_kb1200_config *config = dev->config;
122
123 config->gpio_regs->GPIOD &= ~pins;
124 return 0;
125 }
126
kb1200_gpio_port_toggle_bits(const struct device * dev,gpio_port_pins_t pins)127 static int kb1200_gpio_port_toggle_bits(const struct device *dev, gpio_port_pins_t pins)
128 {
129 const struct gpio_kb1200_config *config = dev->config;
130
131 config->gpio_regs->GPIOD ^= pins;
132 return 0;
133 }
134
kb1200_gpio_pin_interrupt_configure(const struct device * dev,gpio_pin_t pin,enum gpio_int_mode mode,enum gpio_int_trig trig)135 static int kb1200_gpio_pin_interrupt_configure(const struct device *dev, gpio_pin_t pin,
136 enum gpio_int_mode mode, enum gpio_int_trig trig)
137 {
138 const struct gpio_kb1200_config *config = dev->config;
139
140 /* Check if GPIO port needs interrupt support */
141 if ((mode & GPIO_INT_DISABLE) || (mode & GPIO_INT_ENABLE) == 0) {
142 /* Set the mask to disable the interrupt */
143 WRITE_BIT(config->gptd_regs->GPTDIE, pin, 0);
144 } else {
145 if (mode & GPIO_INT_EDGE) {
146 WRITE_BIT(config->gptd_regs->GPTDEL, pin, 0);
147 if (trig & GPIO_INT_HIGH_1) {
148 if (trig & GPIO_INT_LOW_0) { /* Falling & Rising edge trigger */
149 /* Enable toggle trigger */
150 WRITE_BIT(config->gptd_regs->GPTDCHG, pin, 1);
151 } else { /* Rising edge */
152 /* Disable toggle trigger */
153 WRITE_BIT(config->gptd_regs->GPTDCHG, pin, 0);
154 WRITE_BIT(config->gptd_regs->GPTDPS, pin, 1);
155 }
156 } else { /* Falling edge */
157 /* Disable Toggle trigger */
158 WRITE_BIT(config->gptd_regs->GPTDCHG, pin, 0);
159 WRITE_BIT(config->gptd_regs->GPTDPS, pin, 0);
160 }
161 } else {
162 WRITE_BIT(config->gptd_regs->GPTDEL, pin, 1);
163 /* Disable Toggle trigger */
164 WRITE_BIT(config->gptd_regs->GPTDCHG, pin, 0);
165 if (trig & GPIO_INT_HIGH_1) {
166 WRITE_BIT(config->gptd_regs->GPTDPS, pin, 1);
167 } else {
168 WRITE_BIT(config->gptd_regs->GPTDPS, pin, 0);
169 }
170 }
171 /* clear pending flag */
172 WRITE_BIT(config->gptd_regs->GPTDPF, pin, 1);
173 /* Enable the interrupt */
174 WRITE_BIT(config->gptd_regs->GPTDIE, pin, 1);
175 }
176 return 0;
177 }
178
kb1200_gpio_manage_callback(const struct device * dev,struct gpio_callback * cb,bool set)179 static int kb1200_gpio_manage_callback(const struct device *dev, struct gpio_callback *cb, bool set)
180 {
181 struct gpio_kb1200_data *context = dev->data;
182
183 gpio_manage_callback(&context->cb, cb, set);
184 return 0;
185 }
186
kb1200_gpio_get_pending_int(const struct device * dev)187 static uint32_t kb1200_gpio_get_pending_int(const struct device *dev)
188 {
189 const struct gpio_kb1200_config *const config = dev->config;
190
191 return config->gptd_regs->GPTDPF;
192 }
193
194 static DEVICE_API(gpio, kb1200_gpio_api) = {
195 .pin_configure = kb1200_gpio_pin_configure,
196 .port_get_raw = kb1200_gpio_port_get_raw,
197 .port_set_masked_raw = kb1200_gpio_port_set_masked_raw,
198 .port_set_bits_raw = kb1200_gpio_port_set_bits_raw,
199 .port_clear_bits_raw = kb1200_gpio_port_clear_bits_raw,
200 .port_toggle_bits = kb1200_gpio_port_toggle_bits,
201 .pin_interrupt_configure = kb1200_gpio_pin_interrupt_configure,
202 .manage_callback = kb1200_gpio_manage_callback,
203 .get_pending_int = kb1200_gpio_get_pending_int,
204 };
205
206 #define KB1200_GPIO_INIT(n) \
207 static int kb1200_gpio_##n##_init(const struct device *dev) \
208 { \
209 IRQ_CONNECT(DT_INST_IRQ_BY_IDX(n, 0, irq), DT_INST_IRQ_BY_IDX(n, 0, priority), \
210 gpio_kb1200_isr, DEVICE_DT_INST_GET(n), 0); \
211 irq_enable(DT_INST_IRQ_BY_IDX(n, 0, irq)); \
212 IRQ_CONNECT(DT_INST_IRQ_BY_IDX(n, 1, irq), DT_INST_IRQ_BY_IDX(n, 1, priority), \
213 gpio_kb1200_isr, DEVICE_DT_INST_GET(n), 0); \
214 irq_enable(DT_INST_IRQ_BY_IDX(n, 1, irq)); \
215 return 0; \
216 }; \
217 static const struct gpio_kb1200_config port_##n##_kb1200_config = { \
218 .common = {.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n)}, \
219 .gpio_regs = (struct gpio_regs *)DT_INST_REG_ADDR_BY_IDX(n, 0), \
220 .gptd_regs = (struct gptd_regs *)DT_INST_REG_ADDR_BY_IDX(n, 1), \
221 }; \
222 static struct gpio_kb1200_data gpio_kb1200_##n##_data; \
223 DEVICE_DT_INST_DEFINE(n, kb1200_gpio_##n##_init, NULL, &gpio_kb1200_##n##_data, \
224 &port_##n##_kb1200_config, PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY, \
225 &kb1200_gpio_api);
226
227 DT_INST_FOREACH_STATUS_OKAY(KB1200_GPIO_INIT)
228
