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(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); 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(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 }; 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