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7#include <common.h>
8#include <dm.h>
9#include <dm/pinctrl.h>
10#include <dt-bindings/pinctrl/sandbox-pinmux.h>
11#include <log.h>
12#include <linux/bitops.h>
13
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20
21
22static const char * const sandbox_pins[] = {
23#define PIN(x) \
24 [x] = "P" #x
25 PIN(0),
26 PIN(1),
27 PIN(2),
28 PIN(3),
29 PIN(4),
30 PIN(5),
31 PIN(6),
32 PIN(7),
33 PIN(8),
34#undef PIN
35};
36
37static const char * const sandbox_pins_muxing[][2] = {
38 { "UART TX", "I2C SCL" },
39 { "UART RX", "I2C SDA" },
40 { "SPI SCLK", "I2S SCK" },
41 { "SPI MOSI", "I2S SD" },
42 { "SPI MISO", "I2S WS" },
43 { "GPIO0", "SPI CS0" },
44 { "GPIO1", "SPI CS1" },
45 { "GPIO2", "PWM0" },
46 { "GPIO3", "PWM1" },
47};
48
49#define SANDBOX_GROUP_I2C_UART 0
50#define SANDBOX_GROUP_SPI_I2S 1
51
52static const char * const sandbox_groups[] = {
53 [SANDBOX_GROUP_I2C_UART] = "I2C_UART",
54 [SANDBOX_GROUP_SPI_I2S] = "SPI_I2S",
55};
56
57static const char * const sandbox_functions[] = {
58#define FUNC(id) \
59 [SANDBOX_PINMUX_##id] = #id
60 FUNC(UART),
61 FUNC(I2C),
62 FUNC(SPI),
63 FUNC(I2S),
64 FUNC(GPIO),
65 FUNC(CS),
66 FUNC(PWM),
67#undef FUNC
68};
69
70static const struct pinconf_param sandbox_conf_params[] = {
71 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
72 { "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
73 { "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
74 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
75 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
76 { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
77 { "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
78 { "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
79 { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
80 { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
81 { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
82};
83
84
85struct sandbox_pinctrl_priv {
86 unsigned int mux;
87 unsigned int pins_param[ARRAY_SIZE(sandbox_pins)];
88 unsigned int pins_value[ARRAY_SIZE(sandbox_pins)];
89};
90
91static int sandbox_get_pins_count(struct udevice *dev)
92{
93 return ARRAY_SIZE(sandbox_pins);
94}
95
96static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
97{
98 return sandbox_pins[selector];
99}
100
101static int sandbox_get_pin_muxing(struct udevice *dev,
102 unsigned int selector,
103 char *buf, int size)
104{
105 const struct pinconf_param *p;
106 struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
107 int i;
108
109 snprintf(buf, size, "%s",
110 sandbox_pins_muxing[selector][!!(priv->mux & BIT(selector))]);
111
112 if (priv->pins_param[selector]) {
113 for (i = 0, p = sandbox_conf_params;
114 i < ARRAY_SIZE(sandbox_conf_params);
115 i++, p++) {
116 if ((priv->pins_param[selector] & BIT(p->param)) &&
117 (!!(priv->pins_value[selector] & BIT(p->param)) ==
118 p->default_value)) {
119 strncat(buf, " ", size);
120 strncat(buf, p->property, size);
121 }
122 }
123 }
124 strncat(buf, ".", size);
125
126 return 0;
127}
128
129static int sandbox_get_groups_count(struct udevice *dev)
130{
131 return ARRAY_SIZE(sandbox_groups);
132}
133
134static const char *sandbox_get_group_name(struct udevice *dev,
135 unsigned selector)
136{
137 return sandbox_groups[selector];
138}
139
140static int sandbox_get_functions_count(struct udevice *dev)
141{
142 return ARRAY_SIZE(sandbox_functions);
143}
144
145static const char *sandbox_get_function_name(struct udevice *dev,
146 unsigned selector)
147{
148 return sandbox_functions[selector];
149}
150
151static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
152 unsigned func_selector)
153{
154 int mux;
155 struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
156
157 debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
158 pin_selector, sandbox_get_pin_name(dev, pin_selector),
159 func_selector, sandbox_get_function_name(dev, func_selector));
160
161 if (pin_selector < 5)
162 return -EINVAL;
163
164 switch (func_selector) {
165 case SANDBOX_PINMUX_GPIO:
166 mux = 0;
167 break;
168 case SANDBOX_PINMUX_CS:
169 case SANDBOX_PINMUX_PWM:
170 mux = BIT(pin_selector);
171 break;
172 default:
173 return -EINVAL;
174 }
175
176 priv->mux &= ~BIT(pin_selector);
177 priv->mux |= mux;
178 priv->pins_param[pin_selector] = 0;
179 priv->pins_value[pin_selector] = 0;
180
181 return 0;
182}
183
184static int sandbox_pinmux_group_set(struct udevice *dev,
185 unsigned group_selector,
186 unsigned func_selector)
187{
188 bool mux;
189 int i, group_start, group_end;
190 struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
191 unsigned int mask;
192
193 debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
194 group_selector, sandbox_get_group_name(dev, group_selector),
195 func_selector, sandbox_get_function_name(dev, func_selector));
196
197 if (group_selector == SANDBOX_GROUP_I2C_UART) {
198 group_start = 0;
199 group_end = 1;
200
201 if (func_selector == SANDBOX_PINMUX_UART)
202 mux = false;
203 else if (func_selector == SANDBOX_PINMUX_I2C)
204 mux = true;
205 else
206 return -EINVAL;
207 } else if (group_selector == SANDBOX_GROUP_SPI_I2S) {
208 group_start = 2;
209 group_end = 4;
210
211 if (func_selector == SANDBOX_PINMUX_SPI)
212 mux = false;
213 else if (func_selector == SANDBOX_PINMUX_I2S)
214 mux = true;
215 else
216 return -EINVAL;
217 } else {
218 return -EINVAL;
219 }
220
221 mask = GENMASK(group_end, group_start);
222 priv->mux &= ~mask;
223 priv->mux |= mux ? mask : 0;
224
225 for (i = group_start; i < group_end; i++) {
226 priv->pins_param[i] = 0;
227 priv->pins_value[i] = 0;
228 }
229
230 return 0;
231}
232
233static int sandbox_pinmux_property_set(struct udevice *dev, u32 pinmux_group)
234{
235 int ret;
236 unsigned pin_selector = pinmux_group & 0xFFFF;
237 unsigned func_selector = pinmux_group >> 16;
238
239 ret = sandbox_pinmux_set(dev, pin_selector, func_selector);
240 return ret ? ret : pin_selector;
241}
242
243static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
244 unsigned param, unsigned argument)
245{
246 struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
247
248 debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
249 pin_selector, sandbox_get_pin_name(dev, pin_selector),
250 param, argument);
251
252 priv->pins_param[pin_selector] |= BIT(param);
253 if (argument)
254 priv->pins_value[pin_selector] |= BIT(param);
255 else
256 priv->pins_value[pin_selector] &= ~BIT(param);
257
258 return 0;
259}
260
261static int sandbox_pinconf_group_set(struct udevice *dev,
262 unsigned group_selector,
263 unsigned param, unsigned argument)
264{
265 debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
266 group_selector, sandbox_get_group_name(dev, group_selector),
267 param, argument);
268
269 return 0;
270}
271
272const struct pinctrl_ops sandbox_pinctrl_ops = {
273 .get_pins_count = sandbox_get_pins_count,
274 .get_pin_name = sandbox_get_pin_name,
275 .get_pin_muxing = sandbox_get_pin_muxing,
276 .get_groups_count = sandbox_get_groups_count,
277 .get_group_name = sandbox_get_group_name,
278 .get_functions_count = sandbox_get_functions_count,
279 .get_function_name = sandbox_get_function_name,
280 .pinmux_set = sandbox_pinmux_set,
281 .pinmux_group_set = sandbox_pinmux_group_set,
282 .pinmux_property_set = sandbox_pinmux_property_set,
283 .pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
284 .pinconf_params = sandbox_conf_params,
285 .pinconf_set = sandbox_pinconf_set,
286 .pinconf_group_set = sandbox_pinconf_group_set,
287 .set_state = pinctrl_generic_set_state,
288};
289
290static const struct udevice_id sandbox_pinctrl_match[] = {
291 { .compatible = "sandbox,pinctrl" },
292 { }
293};
294
295U_BOOT_DRIVER(sandbox_pinctrl) = {
296 .name = "sandbox_pinctrl",
297 .id = UCLASS_PINCTRL,
298 .of_match = sandbox_pinctrl_match,
299 .priv_auto = sizeof(struct sandbox_pinctrl_priv),
300 .ops = &sandbox_pinctrl_ops,
301};
302
