summaryrefslogtreecommitdiffstats
path: root/drivers/pinctrl/pinctrl-loongson2.c
blob: 4d4fbeadafb7cd94dd6053122efcb52dc6bc3255 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
// SPDX-License-Identifier: GPL-2.0+
/*
 * Author: zhanghongchen <zhanghongchen@loongson.cn>
 *         Yinbo Zhu <zhuyinbo@loongson.cn>
 * Copyright (C) 2022-2023 Loongson Technology Corporation Limited
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mod_devicetable.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/seq_file.h>

#include "core.h"
#include "pinctrl-utils.h"

#define PMX_GROUP(name, offset, bitv)					\
	{								\
		.grp = PINCTRL_PINGROUP((#name), (name ## _pins),	\
				ARRAY_SIZE((name ## _pins))),		\
		.reg = offset,						\
		.bit = bitv,						\
	}

#define SPECIFIC_GROUP(group)						\
	static const char * const group##_groups[] = {			\
		#group							\
	}

#define FUNCTION(fn)							\
	{								\
		.name = #fn,						\
		.groups = fn ## _groups,				\
		.num_groups = ARRAY_SIZE(fn ## _groups),		\
	}

struct loongson2_pinctrl {
	struct device *dev;
	struct pinctrl_dev *pcdev;
	struct pinctrl_desc desc;
	struct device_node *of_node;
	spinlock_t lock;
	void __iomem *reg_base;
};

struct loongson2_pmx_group {
	struct pingroup grp;
	unsigned int reg;
	unsigned int bit;
};

struct loongson2_pmx_func {
	const char *name;
	const char * const *groups;
	unsigned int num_groups;
};

#define LOONGSON2_PIN(x) PINCTRL_PIN(x, "gpio"#x)
static const struct pinctrl_pin_desc loongson2_pctrl_pins[] = {
	LOONGSON2_PIN(0),  LOONGSON2_PIN(1),  LOONGSON2_PIN(2),  LOONGSON2_PIN(3),
	LOONGSON2_PIN(4),  LOONGSON2_PIN(5),  LOONGSON2_PIN(6),  LOONGSON2_PIN(7),
	LOONGSON2_PIN(8),  LOONGSON2_PIN(9),  LOONGSON2_PIN(10), LOONGSON2_PIN(11),
	LOONGSON2_PIN(12), LOONGSON2_PIN(13), LOONGSON2_PIN(14),
	LOONGSON2_PIN(16), LOONGSON2_PIN(17), LOONGSON2_PIN(18), LOONGSON2_PIN(19),
	LOONGSON2_PIN(20), LOONGSON2_PIN(21), LOONGSON2_PIN(22), LOONGSON2_PIN(23),
	LOONGSON2_PIN(24), LOONGSON2_PIN(25), LOONGSON2_PIN(26), LOONGSON2_PIN(27),
	LOONGSON2_PIN(28), LOONGSON2_PIN(29), LOONGSON2_PIN(30),
	LOONGSON2_PIN(32), LOONGSON2_PIN(33), LOONGSON2_PIN(34), LOONGSON2_PIN(35),
	LOONGSON2_PIN(36), LOONGSON2_PIN(37), LOONGSON2_PIN(38), LOONGSON2_PIN(39),
	LOONGSON2_PIN(40), LOONGSON2_PIN(41),
	LOONGSON2_PIN(44), LOONGSON2_PIN(45), LOONGSON2_PIN(46), LOONGSON2_PIN(47),
	LOONGSON2_PIN(48), LOONGSON2_PIN(49), LOONGSON2_PIN(50), LOONGSON2_PIN(51),
	LOONGSON2_PIN(52), LOONGSON2_PIN(53), LOONGSON2_PIN(54), LOONGSON2_PIN(55),
	LOONGSON2_PIN(56), LOONGSON2_PIN(57), LOONGSON2_PIN(58), LOONGSON2_PIN(59),
	LOONGSON2_PIN(60), LOONGSON2_PIN(61), LOONGSON2_PIN(62), LOONGSON2_PIN(63),
};

static const unsigned int gpio_pins[] = {0, 1, 2, 3, 4, 5, 6, 7,
					 8, 9, 10, 11, 12, 13, 14,
					 16, 17, 18, 19, 20, 21, 22, 23,
					 24, 25, 26, 27, 28, 29, 30,
					 32, 33, 34, 35, 36, 37, 38, 39,
					 40,         43, 44, 45, 46, 47,
					 48, 49, 50, 51, 52, 53, 46, 55,
					 56, 57, 58, 59, 60, 61, 62, 63};
static const unsigned int sdio_pins[] = {36, 37, 38, 39, 40, 41};
static const unsigned int can1_pins[] = {34, 35};
static const unsigned int can0_pins[] = {32, 33};
static const unsigned int pwm3_pins[] = {23};
static const unsigned int pwm2_pins[] = {22};
static const unsigned int pwm1_pins[] = {21};
static const unsigned int pwm0_pins[] = {20};
static const unsigned int i2c1_pins[] = {18, 19};
static const unsigned int i2c0_pins[] = {16, 17};
static const unsigned int nand_pins[] = {44, 45, 46, 47, 48, 49, 50, 51,
					 52, 53, 54, 55, 56, 57, 58, 59, 60,
					 61, 62, 63};
static const unsigned int sata_led_pins[] = {14};
static const unsigned int i2s_pins[]    = {24, 25, 26, 27, 28};
static const unsigned int hda_pins[]    = {24, 25, 26, 27, 28, 29, 30};

static struct loongson2_pmx_group loongson2_pmx_groups[] = {
	PMX_GROUP(gpio, 0x0, 64),
	PMX_GROUP(sdio, 0x0, 20),
	PMX_GROUP(can1, 0x0, 17),
	PMX_GROUP(can0, 0x0, 16),
	PMX_GROUP(pwm3, 0x0, 15),
	PMX_GROUP(pwm2, 0x0, 14),
	PMX_GROUP(pwm1, 0x0, 13),
	PMX_GROUP(pwm0, 0x0, 12),
	PMX_GROUP(i2c1, 0x0, 11),
	PMX_GROUP(i2c0, 0x0, 10),
	PMX_GROUP(nand, 0x0, 9),
	PMX_GROUP(sata_led, 0x0, 8),
	PMX_GROUP(i2s, 0x0, 6),
	PMX_GROUP(hda, 0x0, 4),
};

SPECIFIC_GROUP(sdio);
SPECIFIC_GROUP(can1);
SPECIFIC_GROUP(can0);
SPECIFIC_GROUP(pwm3);
SPECIFIC_GROUP(pwm2);
SPECIFIC_GROUP(pwm1);
SPECIFIC_GROUP(pwm0);
SPECIFIC_GROUP(i2c1);
SPECIFIC_GROUP(i2c0);
SPECIFIC_GROUP(nand);
SPECIFIC_GROUP(sata_led);
SPECIFIC_GROUP(i2s);
SPECIFIC_GROUP(hda);

static const char * const gpio_groups[] = {
	"sdio",
	"can1", "can0",
	"pwm3", "pwm2", "pwm1", "pwm0",
	"i2c1", "i2c0",
	"nand",
	"sata_led",
	"i2s",
	"hda",
};

static const struct loongson2_pmx_func loongson2_pmx_functions[] = {
	FUNCTION(gpio),
	FUNCTION(sdio),
	FUNCTION(can1),
	FUNCTION(can0),
	FUNCTION(pwm3),
	FUNCTION(pwm2),
	FUNCTION(pwm1),
	FUNCTION(pwm0),
	FUNCTION(i2c1),
	FUNCTION(i2c0),
	FUNCTION(nand),
	FUNCTION(sata_led),
	FUNCTION(i2s),
	FUNCTION(hda),
};

static int loongson2_get_groups_count(struct pinctrl_dev *pcdev)
{
	return ARRAY_SIZE(loongson2_pmx_groups);
}

static const char *loongson2_get_group_name(struct pinctrl_dev *pcdev,
					unsigned int selector)
{
	return loongson2_pmx_groups[selector].grp.name;
}

static int loongson2_get_group_pins(struct pinctrl_dev *pcdev, unsigned int selector,
			const unsigned int **pins, unsigned int *num_pins)
{
	*pins = loongson2_pmx_groups[selector].grp.pins;
	*num_pins = loongson2_pmx_groups[selector].grp.npins;

	return 0;
}

static void loongson2_pin_dbg_show(struct pinctrl_dev *pcdev, struct seq_file *s,
			       unsigned int offset)
{
	seq_printf(s, " %s", dev_name(pcdev->dev));
}

static const struct pinctrl_ops loongson2_pctrl_ops = {
	.get_groups_count	= loongson2_get_groups_count,
	.get_group_name		= loongson2_get_group_name,
	.get_group_pins		= loongson2_get_group_pins,
	.dt_node_to_map		= pinconf_generic_dt_node_to_map_all,
	.dt_free_map		= pinctrl_utils_free_map,
	.pin_dbg_show		= loongson2_pin_dbg_show,
};

static int loongson2_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned int func_num,
			      unsigned int group_num)
{
	struct loongson2_pinctrl *pctrl = pinctrl_dev_get_drvdata(pcdev);
	void __iomem *reg = pctrl->reg_base +
				loongson2_pmx_groups[group_num].reg;
	unsigned int mux_bit = loongson2_pmx_groups[group_num].bit;
	unsigned int val;
	unsigned long flags;

	spin_lock_irqsave(&pctrl->lock, flags);
	val = readl(reg);
	if (func_num == 0)
		val &= ~BIT(mux_bit);
	else
		val |= BIT(mux_bit);
	writel(val, reg);
	spin_unlock_irqrestore(&pctrl->lock, flags);

	return 0;
}

static int loongson2_pmx_get_funcs_count(struct pinctrl_dev *pcdev)
{
	return ARRAY_SIZE(loongson2_pmx_functions);
}

static const char *loongson2_pmx_get_func_name(struct pinctrl_dev *pcdev,
				    unsigned int selector)
{
	return loongson2_pmx_functions[selector].name;
}

static int loongson2_pmx_get_groups(struct pinctrl_dev *pcdev,
			 unsigned int selector,
			 const char * const **groups,
			 unsigned int * const num_groups)
{
	*groups = loongson2_pmx_functions[selector].groups;
	*num_groups = loongson2_pmx_functions[selector].num_groups;

	return 0;
}

static const struct pinmux_ops loongson2_pmx_ops = {
	.set_mux = loongson2_pmx_set_mux,
	.get_functions_count = loongson2_pmx_get_funcs_count,
	.get_function_name = loongson2_pmx_get_func_name,
	.get_function_groups = loongson2_pmx_get_groups,
};

static int loongson2_pinctrl_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct loongson2_pinctrl *pctrl;

	pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
	if (!pctrl)
		return -ENOMEM;

	pctrl->reg_base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(pctrl->reg_base))
		return PTR_ERR(pctrl->reg_base);

	spin_lock_init(&pctrl->lock);

	pctrl->dev = dev;
	pctrl->desc.name	= "pinctrl-loongson2";
	pctrl->desc.owner	= THIS_MODULE;
	pctrl->desc.pctlops	= &loongson2_pctrl_ops;
	pctrl->desc.pmxops	= &loongson2_pmx_ops;
	pctrl->desc.pins	= loongson2_pctrl_pins;
	pctrl->desc.npins	= ARRAY_SIZE(loongson2_pctrl_pins);

	pctrl->pcdev = devm_pinctrl_register(pctrl->dev, &pctrl->desc, pctrl);
	if (IS_ERR(pctrl->pcdev))
		return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->pcdev),
				     "can't register pinctrl device");

	return 0;
}

static const struct of_device_id loongson2_pinctrl_dt_match[] = {
	{
		.compatible = "loongson,ls2k-pinctrl",
	},
	{ }
};
MODULE_DEVICE_TABLE(of, loongson2_pinctrl_dt_match);

static struct platform_driver loongson2_pinctrl_driver = {
	.probe		= loongson2_pinctrl_probe,
	.driver = {
		.name	= "loongson2-pinctrl",
		.of_match_table = loongson2_pinctrl_dt_match,
	},
};

static int __init loongson2_pinctrl_init(void)
{
	return platform_driver_register(&loongson2_pinctrl_driver);
}
arch_initcall(loongson2_pinctrl_init);

static void __exit loongson2_pinctrl_exit(void)
{
	platform_driver_unregister(&loongson2_pinctrl_driver);
}
module_exit(loongson2_pinctrl_exit);

MODULE_DESCRIPTION("Loongson2 Pinctrl driver");
MODULE_LICENSE("GPL");