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 };
18 
19 static const char * const sandbox_groups[] = {
20 	"i2c",
21 	"serial_a",
22 	"serial_b",
23 	"spi",
24 };
25 
26 static const char * const sandbox_functions[] = {
27 	"i2c",
28 	"serial",
29 	"spi",
30 };
31 
32 static const struct pinconf_param sandbox_conf_params[] = {
33 	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
34 	{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
35 	{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
36 	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
37 	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
38 	{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
39 	{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
40 	{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
41 	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
42 	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
43 	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
44 };
45 
46 static int sandbox_get_pins_count(struct udevice *dev)
47 {
48 	return ARRAY_SIZE(sandbox_pins);
49 }
50 
51 static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
52 {
53 	return sandbox_pins[selector];
54 }
55 
56 static int sandbox_get_groups_count(struct udevice *dev)
57 {
58 	return ARRAY_SIZE(sandbox_groups);
59 }
60 
61 static const char *sandbox_get_group_name(struct udevice *dev,
62 					  unsigned selector)
63 {
64 	return sandbox_groups[selector];
65 }
66 
67 static int sandbox_get_functions_count(struct udevice *dev)
68 {
69 	return ARRAY_SIZE(sandbox_functions);
70 }
71 
72 static const char *sandbox_get_function_name(struct udevice *dev,
73 					     unsigned selector)
74 {
75 	return sandbox_functions[selector];
76 }
77 
78 static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
79 			      unsigned func_selector)
80 {
81 	debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
82 	      pin_selector, sandbox_get_pin_name(dev, pin_selector),
83 	      func_selector, sandbox_get_function_name(dev, func_selector));
84 
85 	return 0;
86 }
87 
88 static int sandbox_pinmux_group_set(struct udevice *dev,
89 				    unsigned group_selector,
90 				    unsigned func_selector)
91 {
92 	debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
93 	      group_selector, sandbox_get_group_name(dev, group_selector),
94 	      func_selector, sandbox_get_function_name(dev, func_selector));
95 
96 	return 0;
97 }
98 
99 static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
100 			       unsigned param, unsigned argument)
101 {
102 	debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
103 	      pin_selector, sandbox_get_pin_name(dev, pin_selector),
104 	      param, argument);
105 
106 	return 0;
107 }
108 
109 static int sandbox_pinconf_group_set(struct udevice *dev,
110 				     unsigned group_selector,
111 				     unsigned param, unsigned argument)
112 {
113 	debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
114 	      group_selector, sandbox_get_group_name(dev, group_selector),
115 	      param, argument);
116 
117 	return 0;
118 }
119 
120 const struct pinctrl_ops sandbox_pinctrl_ops = {
121 	.get_pins_count = sandbox_get_pins_count,
122 	.get_pin_name = sandbox_get_pin_name,
123 	.get_groups_count = sandbox_get_groups_count,
124 	.get_group_name = sandbox_get_group_name,
125 	.get_functions_count = sandbox_get_functions_count,
126 	.get_function_name = sandbox_get_function_name,
127 	.pinmux_set = sandbox_pinmux_set,
128 	.pinmux_group_set = sandbox_pinmux_group_set,
129 	.pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
130 	.pinconf_params = sandbox_conf_params,
131 	.pinconf_set = sandbox_pinconf_set,
132 	.pinconf_group_set = sandbox_pinconf_group_set,
133 	.set_state = pinctrl_generic_set_state,
134 };
135 
136 static const struct udevice_id sandbox_pinctrl_match[] = {
137 	{ .compatible = "sandbox,pinctrl" },
138 	{ /* sentinel */ }
139 };
140 
141 U_BOOT_DRIVER(sandbox_pinctrl) = {
142 	.name = "sandbox_pinctrl",
143 	.id = UCLASS_PINCTRL,
144 	.of_match = sandbox_pinctrl_match,
145 	.ops = &sandbox_pinctrl_ops,
146 };
147