zhanghongchen | f73f88a | 2022-11-14 10:49:41 +0800 | [diff] [blame] | 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; |
Linus Walleij | 7ebfe10 | 2022-11-25 11:34:35 +0100 | [diff] [blame] | 48 | void __iomem *reg_base; |
zhanghongchen | f73f88a | 2022-11-14 10:49:41 +0800 | [diff] [blame] | 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(s, " %s", dev_name(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(pcdev); |
Linus Walleij | 7ebfe10 | 2022-11-25 11:34:35 +0100 | [diff] [blame] | 205 | void __iomem *reg = pctrl->reg_base + |
zhanghongchen | f73f88a | 2022-11-14 10:49:41 +0800 | [diff] [blame] | 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(reg); |
| 213 | if (func_num == 0) |
| 214 | val &= ~BIT(mux_bit); |
| 215 | else |
| 216 | val |= BIT(mux_bit); |
| 217 | writel(val, reg); |
| 218 | spin_unlock_irqrestore(&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, sizeof(*pctrl), GFP_KERNEL); |
| 258 | if (!pctrl) |
| 259 | return -ENOMEM; |
| 260 | |
| 261 | pctrl->reg_base = devm_platform_ioremap_resource(pdev, 0); |
| 262 | if (IS_ERR(pctrl->reg_base)) |
| 263 | return PTR_ERR(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(pctrl->dev, &pctrl->desc, pctrl); |
| 276 | if (IS_ERR(pctrl->pcdev)) |
| 277 | return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->pcdev), |
| 278 | "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 | }; |
Krzysztof Kozlowski | 75589d6 | 2024-04-11 08:46:12 +0200 | [diff] [blame] | 289 | MODULE_DEVICE_TABLE(of, loongson2_pinctrl_dt_match); |
zhanghongchen | f73f88a | 2022-11-14 10:49:41 +0800 | [diff] [blame] | 290 | |
| 291 | static struct platform_driver loongson2_pinctrl_driver = { |
| 292 | .probe = loongson2_pinctrl_probe, |
| 293 | .driver = { |
| 294 | .name = "loongson2-pinctrl", |
| 295 | .of_match_table = loongson2_pinctrl_dt_match, |
| 296 | }, |
| 297 | }; |
| 298 | |
| 299 | static int __init loongson2_pinctrl_init(void) |
| 300 | { |
| 301 | return platform_driver_register(&loongson2_pinctrl_driver); |
| 302 | } |
| 303 | arch_initcall(loongson2_pinctrl_init); |
| 304 | |
| 305 | static void __exit loongson2_pinctrl_exit(void) |
| 306 | { |
| 307 | platform_driver_unregister(&loongson2_pinctrl_driver); |
| 308 | } |
| 309 | module_exit(loongson2_pinctrl_exit); |
| 310 | |
| 311 | MODULE_DESCRIPTION("Loongson2 Pinctrl driver"); |
| 312 | MODULE_LICENSE("GPL"); |