1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
4 */
5
6 /* #define DEBUG */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <dm/pinctrl.h>
11
12 static const char * const sandbox_pins[] = {
13 "SCL",
14 "SDA",
15 "TX",
16 "RX",
17 "W1"
18 };
19
20 static const char * const sandbox_pins_muxing[] = {
21 "I2C SCL",
22 "I2C SDA",
23 "Uart TX",
24 "Uart RX",
25 "1-wire gpio",
26 };
27
28 static const char * const sandbox_groups[] = {
29 "i2c",
30 "serial_a",
31 "serial_b",
32 "spi",
33 "w1",
34 };
35
36 static const char * const sandbox_functions[] = {
37 "i2c",
38 "serial",
39 "spi",
40 "w1",
41 };
42
43 static const struct pinconf_param sandbox_conf_params[] = {
44 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
45 { "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
46 { "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
47 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
48 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
49 { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
50 { "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
51 { "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
52 { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
53 { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
54 { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
55 };
56
sandbox_get_pins_count(struct udevice * dev)57 static int sandbox_get_pins_count(struct udevice *dev)
58 {
59 return ARRAY_SIZE(sandbox_pins);
60 }
61
sandbox_get_pin_name(struct udevice * dev,unsigned selector)62 static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
63 {
64 return sandbox_pins[selector];
65 }
66
sandbox_get_pin_muxing(struct udevice * dev,unsigned int selector,char * buf,int size)67 static int sandbox_get_pin_muxing(struct udevice *dev,
68 unsigned int selector,
69 char *buf, int size)
70 {
71 snprintf(buf, size, "%s", sandbox_pins_muxing[selector]);
72
73 return 0;
74 }
75
sandbox_get_groups_count(struct udevice * dev)76 static int sandbox_get_groups_count(struct udevice *dev)
77 {
78 return ARRAY_SIZE(sandbox_groups);
79 }
80
sandbox_get_group_name(struct udevice * dev,unsigned selector)81 static const char *sandbox_get_group_name(struct udevice *dev,
82 unsigned selector)
83 {
84 return sandbox_groups[selector];
85 }
86
sandbox_get_functions_count(struct udevice * dev)87 static int sandbox_get_functions_count(struct udevice *dev)
88 {
89 return ARRAY_SIZE(sandbox_functions);
90 }
91
sandbox_get_function_name(struct udevice * dev,unsigned selector)92 static const char *sandbox_get_function_name(struct udevice *dev,
93 unsigned selector)
94 {
95 return sandbox_functions[selector];
96 }
97
sandbox_pinmux_set(struct udevice * dev,unsigned pin_selector,unsigned func_selector)98 static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
99 unsigned func_selector)
100 {
101 debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
102 pin_selector, sandbox_get_pin_name(dev, pin_selector),
103 func_selector, sandbox_get_function_name(dev, func_selector));
104
105 return 0;
106 }
107
sandbox_pinmux_group_set(struct udevice * dev,unsigned group_selector,unsigned func_selector)108 static int sandbox_pinmux_group_set(struct udevice *dev,
109 unsigned group_selector,
110 unsigned func_selector)
111 {
112 debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
113 group_selector, sandbox_get_group_name(dev, group_selector),
114 func_selector, sandbox_get_function_name(dev, func_selector));
115
116 return 0;
117 }
118
sandbox_pinconf_set(struct udevice * dev,unsigned pin_selector,unsigned param,unsigned argument)119 static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
120 unsigned param, unsigned argument)
121 {
122 debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
123 pin_selector, sandbox_get_pin_name(dev, pin_selector),
124 param, argument);
125
126 return 0;
127 }
128
sandbox_pinconf_group_set(struct udevice * dev,unsigned group_selector,unsigned param,unsigned argument)129 static int sandbox_pinconf_group_set(struct udevice *dev,
130 unsigned group_selector,
131 unsigned param, unsigned argument)
132 {
133 debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
134 group_selector, sandbox_get_group_name(dev, group_selector),
135 param, argument);
136
137 return 0;
138 }
139
140 const struct pinctrl_ops sandbox_pinctrl_ops = {
141 .get_pins_count = sandbox_get_pins_count,
142 .get_pin_name = sandbox_get_pin_name,
143 .get_pin_muxing = sandbox_get_pin_muxing,
144 .get_groups_count = sandbox_get_groups_count,
145 .get_group_name = sandbox_get_group_name,
146 .get_functions_count = sandbox_get_functions_count,
147 .get_function_name = sandbox_get_function_name,
148 .pinmux_set = sandbox_pinmux_set,
149 .pinmux_group_set = sandbox_pinmux_group_set,
150 .pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
151 .pinconf_params = sandbox_conf_params,
152 .pinconf_set = sandbox_pinconf_set,
153 .pinconf_group_set = sandbox_pinconf_group_set,
154 .set_state = pinctrl_generic_set_state,
155 };
156
157 static const struct udevice_id sandbox_pinctrl_match[] = {
158 { .compatible = "sandbox,pinctrl" },
159 { /* sentinel */ }
160 };
161
162 U_BOOT_DRIVER(sandbox_pinctrl) = {
163 .name = "sandbox_pinctrl",
164 .id = UCLASS_PINCTRL,
165 .of_match = sandbox_pinctrl_match,
166 .ops = &sandbox_pinctrl_ops,
167 };
168