1 /*
2 * Copyright (c) 2018 Justin Watson
3 * Copyright (c) 2020 ATL Electronics
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 */
7
8 #define DT_DRV_COMPAT cypress_psoc6_gpio
9
10 #include <errno.h>
11 #include <zephyr/kernel.h>
12 #include <zephyr/device.h>
13 #include <zephyr/init.h>
14 #include <soc.h>
15 #include <zephyr/drivers/gpio.h>
16
17 #include <zephyr/drivers/gpio/gpio_utils.h>
18 #include "cy_gpio.h"
19 #include "cy_sysint.h"
20
21 #define LOG_LEVEL CONFIG_GPIO_LOG_LEVEL
22 #include <zephyr/logging/log.h>
23 LOG_MODULE_REGISTER(gpio_psoc6);
24
25 typedef void (*config_func_t)(const struct device *dev);
26
27 struct gpio_psoc6_config {
28 /* gpio_driver_config needs to be first */
29 struct gpio_driver_config common;
30 GPIO_PRT_Type *regs;
31 config_func_t config_func;
32 };
33
34 struct gpio_psoc6_runtime {
35 /* gpio_driver_data needs to be first */
36 struct gpio_driver_data common;
37 sys_slist_t cb;
38 };
39
gpio_psoc6_config(const struct device * dev,gpio_pin_t pin,gpio_flags_t flags)40 static int gpio_psoc6_config(const struct device *dev,
41 gpio_pin_t pin,
42 gpio_flags_t flags)
43 {
44 const struct gpio_psoc6_config * const cfg = dev->config;
45 GPIO_PRT_Type * const port = cfg->regs;
46 uint32_t drv_mode;
47 uint32_t pin_val;
48
49 if (flags & GPIO_OUTPUT) {
50 if (flags & GPIO_SINGLE_ENDED) {
51 drv_mode = (flags & GPIO_LINE_OPEN_DRAIN) ?
52 CY_GPIO_DM_OD_DRIVESLOW_IN_OFF :
53 CY_GPIO_DM_OD_DRIVESHIGH_IN_OFF;
54
55 pin_val = (flags & GPIO_LINE_OPEN_DRAIN) ? 1 : 0;
56 } else {
57 drv_mode = CY_GPIO_DM_STRONG_IN_OFF;
58
59 pin_val = (flags & GPIO_OUTPUT_INIT_HIGH) ? 1 : 0;
60 }
61 } else {
62 if ((flags & GPIO_PULL_UP) && (flags & GPIO_PULL_DOWN)) {
63 drv_mode = CY_GPIO_DM_PULLUP_DOWN_IN_OFF;
64 } else if (flags & GPIO_PULL_UP) {
65 drv_mode = CY_GPIO_DM_PULLUP_IN_OFF;
66 } else if (flags & GPIO_PULL_DOWN) {
67 drv_mode = CY_GPIO_DM_PULLDOWN_IN_OFF;
68 } else {
69 drv_mode = CY_GPIO_DM_ANALOG;
70 }
71
72 pin_val = (flags & GPIO_PULL_UP) ? 1 : 0;
73 }
74
75 if (flags & GPIO_INPUT) {
76 /* enable input buffer */
77 drv_mode |= CY_GPIO_DM_HIGHZ;
78 }
79
80 Cy_GPIO_Pin_FastInit(port, pin, drv_mode, pin_val, HSIOM_SEL_GPIO);
81 Cy_GPIO_SetVtrip(port, pin, CY_GPIO_VTRIP_CMOS);
82 Cy_GPIO_SetSlewRate(port, pin, CY_GPIO_SLEW_FAST);
83 Cy_GPIO_SetDriveSel(port, pin, CY_GPIO_DRIVE_FULL);
84
85 LOG_DBG("P: 0x%08x, Pin: %d, Mode: 0x%08x, Val: 0x%02x",
86 (unsigned int) port, pin, drv_mode, pin_val);
87
88 return 0;
89 }
90
gpio_psoc6_port_get_raw(const struct device * dev,uint32_t * value)91 static int gpio_psoc6_port_get_raw(const struct device *dev,
92 uint32_t *value)
93 {
94 const struct gpio_psoc6_config * const cfg = dev->config;
95 GPIO_PRT_Type * const port = cfg->regs;
96
97 *value = GPIO_PRT_IN(port);
98
99 LOG_DBG("P: 0x%08x, V: 0x%08x", (unsigned int) port, *value);
100
101 return 0;
102 }
103
gpio_psoc6_port_set_masked_raw(const struct device * dev,uint32_t mask,uint32_t value)104 static int gpio_psoc6_port_set_masked_raw(const struct device *dev,
105 uint32_t mask,
106 uint32_t value)
107 {
108 const struct gpio_psoc6_config * const cfg = dev->config;
109 GPIO_PRT_Type * const port = cfg->regs;
110
111 GPIO_PRT_OUT(port) = (GPIO_PRT_IN(port) & ~mask) | (mask & value);
112
113 return 0;
114 }
115
gpio_psoc6_port_set_bits_raw(const struct device * dev,uint32_t mask)116 static int gpio_psoc6_port_set_bits_raw(const struct device *dev,
117 uint32_t mask)
118 {
119 const struct gpio_psoc6_config * const cfg = dev->config;
120 GPIO_PRT_Type * const port = cfg->regs;
121
122 GPIO_PRT_OUT_SET(port) = mask;
123
124 return 0;
125 }
126
gpio_psoc6_port_clear_bits_raw(const struct device * dev,uint32_t mask)127 static int gpio_psoc6_port_clear_bits_raw(const struct device *dev,
128 uint32_t mask)
129 {
130 const struct gpio_psoc6_config * const cfg = dev->config;
131 GPIO_PRT_Type * const port = cfg->regs;
132
133 GPIO_PRT_OUT_CLR(port) = mask;
134
135 return 0;
136 }
137
gpio_psoc6_port_toggle_bits(const struct device * dev,uint32_t mask)138 static int gpio_psoc6_port_toggle_bits(const struct device *dev,
139 uint32_t mask)
140 {
141 const struct gpio_psoc6_config * const cfg = dev->config;
142 GPIO_PRT_Type * const port = cfg->regs;
143
144 GPIO_PRT_OUT_INV(port) = mask;
145
146 return 0;
147 }
148
gpio_psoc6_pin_interrupt_configure(const struct device * dev,gpio_pin_t pin,enum gpio_int_mode mode,enum gpio_int_trig trig)149 static int gpio_psoc6_pin_interrupt_configure(const struct device *dev,
150 gpio_pin_t pin,
151 enum gpio_int_mode mode,
152 enum gpio_int_trig trig)
153 {
154 const struct gpio_psoc6_config * const cfg = dev->config;
155 GPIO_PRT_Type * const port = cfg->regs;
156 uint32_t is_enabled = ((mode == GPIO_INT_MODE_DISABLED) ? 0 : 1);
157 uint32_t lv_trg = CY_GPIO_INTR_DISABLE;
158
159 if (mode == GPIO_INT_MODE_LEVEL) {
160 return -ENOTSUP;
161 }
162
163 if (is_enabled) {
164 switch (trig) {
165 case GPIO_INT_TRIG_BOTH:
166 lv_trg = CY_GPIO_INTR_BOTH;
167 break;
168 case GPIO_INT_TRIG_HIGH:
169 lv_trg = CY_GPIO_INTR_RISING;
170 break;
171 case GPIO_INT_TRIG_LOW:
172 lv_trg = CY_GPIO_INTR_FALLING;
173 break;
174 }
175 }
176
177 Cy_GPIO_ClearInterrupt(port, pin);
178 Cy_GPIO_SetInterruptEdge(port, pin, lv_trg);
179 Cy_GPIO_SetInterruptMask(port, pin, is_enabled);
180 /**
181 * The driver will set 50ns glitch free filter for any interrupt.
182 */
183 Cy_GPIO_SetFilter(port, pin);
184
185 LOG_DBG("config: Pin: %d, Trg: %d", pin, lv_trg);
186
187 return 0;
188 }
189
gpio_psoc6_isr(const struct device * dev)190 static void gpio_psoc6_isr(const struct device *dev)
191 {
192 const struct gpio_psoc6_config * const cfg = dev->config;
193 GPIO_PRT_Type * const port = cfg->regs;
194 struct gpio_psoc6_runtime *context = dev->data;
195 uint32_t int_stat;
196
197 int_stat = GPIO_PRT_INTR_MASKED(port);
198
199 /* Any INTR MMIO registers AHB clearing must be preceded with an AHB
200 * read access. Taken from Cy_GPIO_ClearInterrupt()
201 */
202 (void)GPIO_PRT_INTR(port);
203 GPIO_PRT_INTR(port) = int_stat;
204 /* This read ensures that the initial write has been flushed out to HW
205 */
206 (void)GPIO_PRT_INTR(port);
207
208 gpio_fire_callbacks(&context->cb, dev, int_stat);
209 }
210
gpio_psoc6_manage_callback(const struct device * port,struct gpio_callback * callback,bool set)211 static int gpio_psoc6_manage_callback(const struct device *port,
212 struct gpio_callback *callback,
213 bool set)
214 {
215 struct gpio_psoc6_runtime *context = port->data;
216
217 return gpio_manage_callback(&context->cb, callback, set);
218 }
219
gpio_psoc6_get_pending_int(const struct device * dev)220 static uint32_t gpio_psoc6_get_pending_int(const struct device *dev)
221 {
222 const struct gpio_psoc6_config * const cfg = dev->config;
223 GPIO_PRT_Type * const port = cfg->regs;
224
225 LOG_DBG("Pending: 0x%08x", GPIO_PRT_INTR_MASKED(port));
226
227 return GPIO_PRT_INTR_MASKED(port);
228 }
229
230 static const struct gpio_driver_api gpio_psoc6_api = {
231 .pin_configure = gpio_psoc6_config,
232 .port_get_raw = gpio_psoc6_port_get_raw,
233 .port_set_masked_raw = gpio_psoc6_port_set_masked_raw,
234 .port_set_bits_raw = gpio_psoc6_port_set_bits_raw,
235 .port_clear_bits_raw = gpio_psoc6_port_clear_bits_raw,
236 .port_toggle_bits = gpio_psoc6_port_toggle_bits,
237 .pin_interrupt_configure = gpio_psoc6_pin_interrupt_configure,
238 .manage_callback = gpio_psoc6_manage_callback,
239 .get_pending_int = gpio_psoc6_get_pending_int,
240 };
241
gpio_psoc6_init(const struct device * dev)242 int gpio_psoc6_init(const struct device *dev)
243 {
244 const struct gpio_psoc6_config * const cfg = dev->config;
245
246 cfg->config_func(dev);
247
248 return 0;
249 }
250
251 #define GPIO_PSOC6_INIT(n) \
252 static void port_##n##_psoc6_config_func(const struct device *dev); \
253 \
254 static const struct gpio_psoc6_config port_##n##_psoc6_config = { \
255 .common = { \
256 .port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n),\
257 }, \
258 .regs = (GPIO_PRT_Type *)DT_INST_REG_ADDR(n), \
259 .config_func = port_##n##_psoc6_config_func, \
260 }; \
261 \
262 static struct gpio_psoc6_runtime port_##n##_psoc6_runtime = { 0 }; \
263 \
264 DEVICE_DT_INST_DEFINE(n, gpio_psoc6_init, NULL, \
265 &port_##n##_psoc6_runtime, \
266 &port_##n##_psoc6_config, PRE_KERNEL_1, \
267 CONFIG_GPIO_INIT_PRIORITY, \
268 &gpio_psoc6_api); \
269 \
270 static void port_##n##_psoc6_config_func(const struct device *dev) \
271 { \
272 CY_PSOC6_DT_INST_NVIC_INSTALL(n, gpio_psoc6_isr); \
273 };
274
275 DT_INST_FOREACH_STATUS_OKAY(GPIO_PSOC6_INIT)
276
