1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Author: zhanghongchen <zhanghongchen@loongson.cn> |
4 | * Yinbo Zhu <zhuyinbo@loongson.cn> |
5 | * Copyright (C) 2022-2023 Loongson Technology Corporation Limited |
6 | */ |
7 | |
8 | #include <linux/init.h> |
9 | #include <linux/module.h> |
10 | #include <linux/platform_device.h> |
11 | #include <linux/mod_devicetable.h> |
12 | #include <linux/pinctrl/pinmux.h> |
13 | #include <linux/pinctrl/pinconf-generic.h> |
14 | #include <linux/pinctrl/pinctrl.h> |
15 | #include <linux/bitops.h> |
16 | #include <linux/io.h> |
17 | #include <linux/seq_file.h> |
18 | |
19 | #include "core.h" |
20 | #include "pinctrl-utils.h" |
21 | |
22 | #define PMX_GROUP(name, offset, bitv) \ |
23 | { \ |
24 | .grp = PINCTRL_PINGROUP((#name), (name ## _pins), \ |
25 | ARRAY_SIZE((name ## _pins))), \ |
26 | .reg = offset, \ |
27 | .bit = bitv, \ |
28 | } |
29 | |
30 | #define SPECIFIC_GROUP(group) \ |
31 | static const char * const group##_groups[] = { \ |
32 | #group \ |
33 | } |
34 | |
35 | #define FUNCTION(fn) \ |
36 | { \ |
37 | .name = #fn, \ |
38 | .groups = fn ## _groups, \ |
39 | .num_groups = ARRAY_SIZE(fn ## _groups), \ |
40 | } |
41 | |
42 | struct loongson2_pinctrl { |
43 | struct device *dev; |
44 | struct pinctrl_dev *pcdev; |
45 | struct pinctrl_desc desc; |
46 | struct device_node *of_node; |
47 | spinlock_t lock; |
48 | void __iomem *reg_base; |
49 | }; |
50 | |
51 | struct loongson2_pmx_group { |
52 | struct pingroup grp; |
53 | unsigned int reg; |
54 | unsigned int bit; |
55 | }; |
56 | |
57 | struct loongson2_pmx_func { |
58 | const char *name; |
59 | const char * const *groups; |
60 | unsigned int num_groups; |
61 | }; |
62 | |
63 | #define LOONGSON2_PIN(x) PINCTRL_PIN(x, "gpio"#x) |
64 | static const struct pinctrl_pin_desc loongson2_pctrl_pins[] = { |
65 | LOONGSON2_PIN(0), LOONGSON2_PIN(1), LOONGSON2_PIN(2), LOONGSON2_PIN(3), |
66 | LOONGSON2_PIN(4), LOONGSON2_PIN(5), LOONGSON2_PIN(6), LOONGSON2_PIN(7), |
67 | LOONGSON2_PIN(8), LOONGSON2_PIN(9), LOONGSON2_PIN(10), LOONGSON2_PIN(11), |
68 | LOONGSON2_PIN(12), LOONGSON2_PIN(13), LOONGSON2_PIN(14), |
69 | LOONGSON2_PIN(16), LOONGSON2_PIN(17), LOONGSON2_PIN(18), LOONGSON2_PIN(19), |
70 | LOONGSON2_PIN(20), LOONGSON2_PIN(21), LOONGSON2_PIN(22), LOONGSON2_PIN(23), |
71 | LOONGSON2_PIN(24), LOONGSON2_PIN(25), LOONGSON2_PIN(26), LOONGSON2_PIN(27), |
72 | LOONGSON2_PIN(28), LOONGSON2_PIN(29), LOONGSON2_PIN(30), |
73 | LOONGSON2_PIN(32), LOONGSON2_PIN(33), LOONGSON2_PIN(34), LOONGSON2_PIN(35), |
74 | LOONGSON2_PIN(36), LOONGSON2_PIN(37), LOONGSON2_PIN(38), LOONGSON2_PIN(39), |
75 | LOONGSON2_PIN(40), LOONGSON2_PIN(41), |
76 | LOONGSON2_PIN(44), LOONGSON2_PIN(45), LOONGSON2_PIN(46), LOONGSON2_PIN(47), |
77 | LOONGSON2_PIN(48), LOONGSON2_PIN(49), LOONGSON2_PIN(50), LOONGSON2_PIN(51), |
78 | LOONGSON2_PIN(52), LOONGSON2_PIN(53), LOONGSON2_PIN(54), LOONGSON2_PIN(55), |
79 | LOONGSON2_PIN(56), LOONGSON2_PIN(57), LOONGSON2_PIN(58), LOONGSON2_PIN(59), |
80 | LOONGSON2_PIN(60), LOONGSON2_PIN(61), LOONGSON2_PIN(62), LOONGSON2_PIN(63), |
81 | }; |
82 | |
83 | static const unsigned int gpio_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, |
84 | 8, 9, 10, 11, 12, 13, 14, |
85 | 16, 17, 18, 19, 20, 21, 22, 23, |
86 | 24, 25, 26, 27, 28, 29, 30, |
87 | 32, 33, 34, 35, 36, 37, 38, 39, |
88 | 40, 43, 44, 45, 46, 47, |
89 | 48, 49, 50, 51, 52, 53, 46, 55, |
90 | 56, 57, 58, 59, 60, 61, 62, 63}; |
91 | static const unsigned int sdio_pins[] = {36, 37, 38, 39, 40, 41}; |
92 | static const unsigned int can1_pins[] = {34, 35}; |
93 | static const unsigned int can0_pins[] = {32, 33}; |
94 | static const unsigned int pwm3_pins[] = {23}; |
95 | static const unsigned int pwm2_pins[] = {22}; |
96 | static const unsigned int pwm1_pins[] = {21}; |
97 | static const unsigned int pwm0_pins[] = {20}; |
98 | static const unsigned int i2c1_pins[] = {18, 19}; |
99 | static const unsigned int i2c0_pins[] = {16, 17}; |
100 | static const unsigned int nand_pins[] = {44, 45, 46, 47, 48, 49, 50, 51, |
101 | 52, 53, 54, 55, 56, 57, 58, 59, 60, |
102 | 61, 62, 63}; |
103 | static const unsigned int sata_led_pins[] = {14}; |
104 | static const unsigned int i2s_pins[] = {24, 25, 26, 27, 28}; |
105 | static const unsigned int hda_pins[] = {24, 25, 26, 27, 28, 29, 30}; |
106 | |
107 | static struct loongson2_pmx_group loongson2_pmx_groups[] = { |
108 | PMX_GROUP(gpio, 0x0, 64), |
109 | PMX_GROUP(sdio, 0x0, 20), |
110 | PMX_GROUP(can1, 0x0, 17), |
111 | PMX_GROUP(can0, 0x0, 16), |
112 | PMX_GROUP(pwm3, 0x0, 15), |
113 | PMX_GROUP(pwm2, 0x0, 14), |
114 | PMX_GROUP(pwm1, 0x0, 13), |
115 | PMX_GROUP(pwm0, 0x0, 12), |
116 | PMX_GROUP(i2c1, 0x0, 11), |
117 | PMX_GROUP(i2c0, 0x0, 10), |
118 | PMX_GROUP(nand, 0x0, 9), |
119 | PMX_GROUP(sata_led, 0x0, 8), |
120 | PMX_GROUP(i2s, 0x0, 6), |
121 | PMX_GROUP(hda, 0x0, 4), |
122 | }; |
123 | |
124 | SPECIFIC_GROUP(sdio); |
125 | SPECIFIC_GROUP(can1); |
126 | SPECIFIC_GROUP(can0); |
127 | SPECIFIC_GROUP(pwm3); |
128 | SPECIFIC_GROUP(pwm2); |
129 | SPECIFIC_GROUP(pwm1); |
130 | SPECIFIC_GROUP(pwm0); |
131 | SPECIFIC_GROUP(i2c1); |
132 | SPECIFIC_GROUP(i2c0); |
133 | SPECIFIC_GROUP(nand); |
134 | SPECIFIC_GROUP(sata_led); |
135 | SPECIFIC_GROUP(i2s); |
136 | SPECIFIC_GROUP(hda); |
137 | |
138 | static const char * const gpio_groups[] = { |
139 | "sdio" , |
140 | "can1" , "can0" , |
141 | "pwm3" , "pwm2" , "pwm1" , "pwm0" , |
142 | "i2c1" , "i2c0" , |
143 | "nand" , |
144 | "sata_led" , |
145 | "i2s" , |
146 | "hda" , |
147 | }; |
148 | |
149 | static const struct loongson2_pmx_func loongson2_pmx_functions[] = { |
150 | FUNCTION(gpio), |
151 | FUNCTION(sdio), |
152 | FUNCTION(can1), |
153 | FUNCTION(can0), |
154 | FUNCTION(pwm3), |
155 | FUNCTION(pwm2), |
156 | FUNCTION(pwm1), |
157 | FUNCTION(pwm0), |
158 | FUNCTION(i2c1), |
159 | FUNCTION(i2c0), |
160 | FUNCTION(nand), |
161 | FUNCTION(sata_led), |
162 | FUNCTION(i2s), |
163 | FUNCTION(hda), |
164 | }; |
165 | |
166 | static int loongson2_get_groups_count(struct pinctrl_dev *pcdev) |
167 | { |
168 | return ARRAY_SIZE(loongson2_pmx_groups); |
169 | } |
170 | |
171 | static const char *loongson2_get_group_name(struct pinctrl_dev *pcdev, |
172 | unsigned int selector) |
173 | { |
174 | return loongson2_pmx_groups[selector].grp.name; |
175 | } |
176 | |
177 | static int loongson2_get_group_pins(struct pinctrl_dev *pcdev, unsigned int selector, |
178 | const unsigned int **pins, unsigned int *num_pins) |
179 | { |
180 | *pins = loongson2_pmx_groups[selector].grp.pins; |
181 | *num_pins = loongson2_pmx_groups[selector].grp.npins; |
182 | |
183 | return 0; |
184 | } |
185 | |
186 | static void loongson2_pin_dbg_show(struct pinctrl_dev *pcdev, struct seq_file *s, |
187 | unsigned int offset) |
188 | { |
189 | seq_printf(m: s, fmt: " %s" , dev_name(dev: pcdev->dev)); |
190 | } |
191 | |
192 | static const struct pinctrl_ops loongson2_pctrl_ops = { |
193 | .get_groups_count = loongson2_get_groups_count, |
194 | .get_group_name = loongson2_get_group_name, |
195 | .get_group_pins = loongson2_get_group_pins, |
196 | .dt_node_to_map = pinconf_generic_dt_node_to_map_all, |
197 | .dt_free_map = pinctrl_utils_free_map, |
198 | .pin_dbg_show = loongson2_pin_dbg_show, |
199 | }; |
200 | |
201 | static int loongson2_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned int func_num, |
202 | unsigned int group_num) |
203 | { |
204 | struct loongson2_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev: pcdev); |
205 | void __iomem *reg = pctrl->reg_base + |
206 | loongson2_pmx_groups[group_num].reg; |
207 | unsigned int mux_bit = loongson2_pmx_groups[group_num].bit; |
208 | unsigned int val; |
209 | unsigned long flags; |
210 | |
211 | spin_lock_irqsave(&pctrl->lock, flags); |
212 | val = readl(addr: reg); |
213 | if (func_num == 0) |
214 | val &= ~BIT(mux_bit); |
215 | else |
216 | val |= BIT(mux_bit); |
217 | writel(val, addr: reg); |
218 | spin_unlock_irqrestore(lock: &pctrl->lock, flags); |
219 | |
220 | return 0; |
221 | } |
222 | |
223 | static int loongson2_pmx_get_funcs_count(struct pinctrl_dev *pcdev) |
224 | { |
225 | return ARRAY_SIZE(loongson2_pmx_functions); |
226 | } |
227 | |
228 | static const char *loongson2_pmx_get_func_name(struct pinctrl_dev *pcdev, |
229 | unsigned int selector) |
230 | { |
231 | return loongson2_pmx_functions[selector].name; |
232 | } |
233 | |
234 | static int loongson2_pmx_get_groups(struct pinctrl_dev *pcdev, |
235 | unsigned int selector, |
236 | const char * const **groups, |
237 | unsigned int * const num_groups) |
238 | { |
239 | *groups = loongson2_pmx_functions[selector].groups; |
240 | *num_groups = loongson2_pmx_functions[selector].num_groups; |
241 | |
242 | return 0; |
243 | } |
244 | |
245 | static const struct pinmux_ops loongson2_pmx_ops = { |
246 | .set_mux = loongson2_pmx_set_mux, |
247 | .get_functions_count = loongson2_pmx_get_funcs_count, |
248 | .get_function_name = loongson2_pmx_get_func_name, |
249 | .get_function_groups = loongson2_pmx_get_groups, |
250 | }; |
251 | |
252 | static int loongson2_pinctrl_probe(struct platform_device *pdev) |
253 | { |
254 | struct device *dev = &pdev->dev; |
255 | struct loongson2_pinctrl *pctrl; |
256 | |
257 | pctrl = devm_kzalloc(dev, size: sizeof(*pctrl), GFP_KERNEL); |
258 | if (!pctrl) |
259 | return -ENOMEM; |
260 | |
261 | pctrl->reg_base = devm_platform_ioremap_resource(pdev, index: 0); |
262 | if (IS_ERR(ptr: pctrl->reg_base)) |
263 | return PTR_ERR(ptr: pctrl->reg_base); |
264 | |
265 | spin_lock_init(&pctrl->lock); |
266 | |
267 | pctrl->dev = dev; |
268 | pctrl->desc.name = "pinctrl-loongson2" ; |
269 | pctrl->desc.owner = THIS_MODULE; |
270 | pctrl->desc.pctlops = &loongson2_pctrl_ops; |
271 | pctrl->desc.pmxops = &loongson2_pmx_ops; |
272 | pctrl->desc.pins = loongson2_pctrl_pins; |
273 | pctrl->desc.npins = ARRAY_SIZE(loongson2_pctrl_pins); |
274 | |
275 | pctrl->pcdev = devm_pinctrl_register(dev: pctrl->dev, pctldesc: &pctrl->desc, driver_data: pctrl); |
276 | if (IS_ERR(ptr: pctrl->pcdev)) |
277 | return dev_err_probe(dev: pctrl->dev, err: PTR_ERR(ptr: pctrl->pcdev), |
278 | fmt: "can't register pinctrl device" ); |
279 | |
280 | return 0; |
281 | } |
282 | |
283 | static const struct of_device_id loongson2_pinctrl_dt_match[] = { |
284 | { |
285 | .compatible = "loongson,ls2k-pinctrl" , |
286 | }, |
287 | { } |
288 | }; |
289 | |
290 | static struct platform_driver loongson2_pinctrl_driver = { |
291 | .probe = loongson2_pinctrl_probe, |
292 | .driver = { |
293 | .name = "loongson2-pinctrl" , |
294 | .of_match_table = loongson2_pinctrl_dt_match, |
295 | }, |
296 | }; |
297 | |
298 | static int __init loongson2_pinctrl_init(void) |
299 | { |
300 | return platform_driver_register(&loongson2_pinctrl_driver); |
301 | } |
302 | arch_initcall(loongson2_pinctrl_init); |
303 | |
304 | static void __exit loongson2_pinctrl_exit(void) |
305 | { |
306 | platform_driver_unregister(&loongson2_pinctrl_driver); |
307 | } |
308 | module_exit(loongson2_pinctrl_exit); |
309 | |
310 | MODULE_DESCRIPTION("Loongson2 Pinctrl driver" ); |
311 | MODULE_LICENSE("GPL" ); |
312 | |