1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for BCM6318 GPIO unit (pinctrl + GPIO) 4 * 5 * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com> 6 * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com> 7 */ 8 9 #include <linux/bits.h> 10 #include <linux/gpio/driver.h> 11 #include <linux/kernel.h> 12 #include <linux/of.h> 13 #include <linux/pinctrl/pinmux.h> 14 #include <linux/platform_device.h> 15 #include <linux/regmap.h> 16 17 #include "../pinctrl-utils.h" 18 19 #include "pinctrl-bcm63xx.h" 20 21 #define BCM6318_NUM_GPIOS 50 22 #define BCM6318_NUM_MUX 48 23 24 #define BCM6318_MODE_REG 0x18 25 #define BCM6318_MUX_REG 0x1c 26 #define BCM6328_MUX_MASK GENMASK(1, 0) 27 #define BCM6318_PAD_REG 0x54 28 #define BCM6328_PAD_MASK GENMASK(3, 0) 29 30 struct bcm6318_pingroup { 31 const char *name; 32 const unsigned * const pins; 33 const unsigned num_pins; 34 }; 35 36 struct bcm6318_function { 37 const char *name; 38 const char * const *groups; 39 const unsigned num_groups; 40 41 unsigned mode_val:1; 42 unsigned mux_val:2; 43 }; 44 45 static const struct pinctrl_pin_desc bcm6318_pins[] = { 46 PINCTRL_PIN(0, "gpio0"), 47 PINCTRL_PIN(1, "gpio1"), 48 PINCTRL_PIN(2, "gpio2"), 49 PINCTRL_PIN(3, "gpio3"), 50 PINCTRL_PIN(4, "gpio4"), 51 PINCTRL_PIN(5, "gpio5"), 52 PINCTRL_PIN(6, "gpio6"), 53 PINCTRL_PIN(7, "gpio7"), 54 PINCTRL_PIN(8, "gpio8"), 55 PINCTRL_PIN(9, "gpio9"), 56 PINCTRL_PIN(10, "gpio10"), 57 PINCTRL_PIN(11, "gpio11"), 58 PINCTRL_PIN(12, "gpio12"), 59 PINCTRL_PIN(13, "gpio13"), 60 PINCTRL_PIN(14, "gpio14"), 61 PINCTRL_PIN(15, "gpio15"), 62 PINCTRL_PIN(16, "gpio16"), 63 PINCTRL_PIN(17, "gpio17"), 64 PINCTRL_PIN(18, "gpio18"), 65 PINCTRL_PIN(19, "gpio19"), 66 PINCTRL_PIN(20, "gpio20"), 67 PINCTRL_PIN(21, "gpio21"), 68 PINCTRL_PIN(22, "gpio22"), 69 PINCTRL_PIN(23, "gpio23"), 70 PINCTRL_PIN(24, "gpio24"), 71 PINCTRL_PIN(25, "gpio25"), 72 PINCTRL_PIN(26, "gpio26"), 73 PINCTRL_PIN(27, "gpio27"), 74 PINCTRL_PIN(28, "gpio28"), 75 PINCTRL_PIN(29, "gpio29"), 76 PINCTRL_PIN(30, "gpio30"), 77 PINCTRL_PIN(31, "gpio31"), 78 PINCTRL_PIN(32, "gpio32"), 79 PINCTRL_PIN(33, "gpio33"), 80 PINCTRL_PIN(34, "gpio34"), 81 PINCTRL_PIN(35, "gpio35"), 82 PINCTRL_PIN(36, "gpio36"), 83 PINCTRL_PIN(37, "gpio37"), 84 PINCTRL_PIN(38, "gpio38"), 85 PINCTRL_PIN(39, "gpio39"), 86 PINCTRL_PIN(40, "gpio40"), 87 PINCTRL_PIN(41, "gpio41"), 88 PINCTRL_PIN(42, "gpio42"), 89 PINCTRL_PIN(43, "gpio43"), 90 PINCTRL_PIN(44, "gpio44"), 91 PINCTRL_PIN(45, "gpio45"), 92 PINCTRL_PIN(46, "gpio46"), 93 PINCTRL_PIN(47, "gpio47"), 94 PINCTRL_PIN(48, "gpio48"), 95 PINCTRL_PIN(49, "gpio49"), 96 }; 97 98 static unsigned gpio0_pins[] = { 0 }; 99 static unsigned gpio1_pins[] = { 1 }; 100 static unsigned gpio2_pins[] = { 2 }; 101 static unsigned gpio3_pins[] = { 3 }; 102 static unsigned gpio4_pins[] = { 4 }; 103 static unsigned gpio5_pins[] = { 5 }; 104 static unsigned gpio6_pins[] = { 6 }; 105 static unsigned gpio7_pins[] = { 7 }; 106 static unsigned gpio8_pins[] = { 8 }; 107 static unsigned gpio9_pins[] = { 9 }; 108 static unsigned gpio10_pins[] = { 10 }; 109 static unsigned gpio11_pins[] = { 11 }; 110 static unsigned gpio12_pins[] = { 12 }; 111 static unsigned gpio13_pins[] = { 13 }; 112 static unsigned gpio14_pins[] = { 14 }; 113 static unsigned gpio15_pins[] = { 15 }; 114 static unsigned gpio16_pins[] = { 16 }; 115 static unsigned gpio17_pins[] = { 17 }; 116 static unsigned gpio18_pins[] = { 18 }; 117 static unsigned gpio19_pins[] = { 19 }; 118 static unsigned gpio20_pins[] = { 20 }; 119 static unsigned gpio21_pins[] = { 21 }; 120 static unsigned gpio22_pins[] = { 22 }; 121 static unsigned gpio23_pins[] = { 23 }; 122 static unsigned gpio24_pins[] = { 24 }; 123 static unsigned gpio25_pins[] = { 25 }; 124 static unsigned gpio26_pins[] = { 26 }; 125 static unsigned gpio27_pins[] = { 27 }; 126 static unsigned gpio28_pins[] = { 28 }; 127 static unsigned gpio29_pins[] = { 29 }; 128 static unsigned gpio30_pins[] = { 30 }; 129 static unsigned gpio31_pins[] = { 31 }; 130 static unsigned gpio32_pins[] = { 32 }; 131 static unsigned gpio33_pins[] = { 33 }; 132 static unsigned gpio34_pins[] = { 34 }; 133 static unsigned gpio35_pins[] = { 35 }; 134 static unsigned gpio36_pins[] = { 36 }; 135 static unsigned gpio37_pins[] = { 37 }; 136 static unsigned gpio38_pins[] = { 38 }; 137 static unsigned gpio39_pins[] = { 39 }; 138 static unsigned gpio40_pins[] = { 40 }; 139 static unsigned gpio41_pins[] = { 41 }; 140 static unsigned gpio42_pins[] = { 42 }; 141 static unsigned gpio43_pins[] = { 43 }; 142 static unsigned gpio44_pins[] = { 44 }; 143 static unsigned gpio45_pins[] = { 45 }; 144 static unsigned gpio46_pins[] = { 46 }; 145 static unsigned gpio47_pins[] = { 47 }; 146 static unsigned gpio48_pins[] = { 48 }; 147 static unsigned gpio49_pins[] = { 49 }; 148 149 #define BCM6318_GROUP(n) \ 150 { \ 151 .name = #n, \ 152 .pins = n##_pins, \ 153 .num_pins = ARRAY_SIZE(n##_pins), \ 154 } 155 156 static struct bcm6318_pingroup bcm6318_groups[] = { 157 BCM6318_GROUP(gpio0), 158 BCM6318_GROUP(gpio1), 159 BCM6318_GROUP(gpio2), 160 BCM6318_GROUP(gpio3), 161 BCM6318_GROUP(gpio4), 162 BCM6318_GROUP(gpio5), 163 BCM6318_GROUP(gpio6), 164 BCM6318_GROUP(gpio7), 165 BCM6318_GROUP(gpio8), 166 BCM6318_GROUP(gpio9), 167 BCM6318_GROUP(gpio10), 168 BCM6318_GROUP(gpio11), 169 BCM6318_GROUP(gpio12), 170 BCM6318_GROUP(gpio13), 171 BCM6318_GROUP(gpio14), 172 BCM6318_GROUP(gpio15), 173 BCM6318_GROUP(gpio16), 174 BCM6318_GROUP(gpio17), 175 BCM6318_GROUP(gpio18), 176 BCM6318_GROUP(gpio19), 177 BCM6318_GROUP(gpio20), 178 BCM6318_GROUP(gpio21), 179 BCM6318_GROUP(gpio22), 180 BCM6318_GROUP(gpio23), 181 BCM6318_GROUP(gpio24), 182 BCM6318_GROUP(gpio25), 183 BCM6318_GROUP(gpio26), 184 BCM6318_GROUP(gpio27), 185 BCM6318_GROUP(gpio28), 186 BCM6318_GROUP(gpio29), 187 BCM6318_GROUP(gpio30), 188 BCM6318_GROUP(gpio31), 189 BCM6318_GROUP(gpio32), 190 BCM6318_GROUP(gpio33), 191 BCM6318_GROUP(gpio34), 192 BCM6318_GROUP(gpio35), 193 BCM6318_GROUP(gpio36), 194 BCM6318_GROUP(gpio37), 195 BCM6318_GROUP(gpio38), 196 BCM6318_GROUP(gpio39), 197 BCM6318_GROUP(gpio40), 198 BCM6318_GROUP(gpio41), 199 BCM6318_GROUP(gpio42), 200 BCM6318_GROUP(gpio43), 201 BCM6318_GROUP(gpio44), 202 BCM6318_GROUP(gpio45), 203 BCM6318_GROUP(gpio46), 204 BCM6318_GROUP(gpio47), 205 BCM6318_GROUP(gpio48), 206 BCM6318_GROUP(gpio49), 207 }; 208 209 /* GPIO_MODE */ 210 static const char * const led_groups[] = { 211 "gpio0", 212 "gpio1", 213 "gpio2", 214 "gpio3", 215 "gpio4", 216 "gpio5", 217 "gpio6", 218 "gpio7", 219 "gpio8", 220 "gpio9", 221 "gpio10", 222 "gpio11", 223 "gpio12", 224 "gpio13", 225 "gpio14", 226 "gpio15", 227 "gpio16", 228 "gpio17", 229 "gpio18", 230 "gpio19", 231 "gpio20", 232 "gpio21", 233 "gpio22", 234 "gpio23", 235 }; 236 237 /* PINMUX_SEL */ 238 static const char * const ephy0_spd_led_groups[] = { 239 "gpio0", 240 }; 241 242 static const char * const ephy1_spd_led_groups[] = { 243 "gpio1", 244 }; 245 246 static const char * const ephy2_spd_led_groups[] = { 247 "gpio2", 248 }; 249 250 static const char * const ephy3_spd_led_groups[] = { 251 "gpio3", 252 }; 253 254 static const char * const ephy0_act_led_groups[] = { 255 "gpio4", 256 }; 257 258 static const char * const ephy1_act_led_groups[] = { 259 "gpio5", 260 }; 261 262 static const char * const ephy2_act_led_groups[] = { 263 "gpio6", 264 }; 265 266 static const char * const ephy3_act_led_groups[] = { 267 "gpio7", 268 }; 269 270 static const char * const serial_led_data_groups[] = { 271 "gpio6", 272 }; 273 274 static const char * const serial_led_clk_groups[] = { 275 "gpio7", 276 }; 277 278 static const char * const inet_act_led_groups[] = { 279 "gpio8", 280 }; 281 282 static const char * const inet_fail_led_groups[] = { 283 "gpio9", 284 }; 285 286 static const char * const dsl_led_groups[] = { 287 "gpio10", 288 }; 289 290 static const char * const post_fail_led_groups[] = { 291 "gpio11", 292 }; 293 294 static const char * const wlan_wps_led_groups[] = { 295 "gpio12", 296 }; 297 298 static const char * const usb_pwron_groups[] = { 299 "gpio13", 300 }; 301 302 static const char * const usb_device_led_groups[] = { 303 "gpio13", 304 }; 305 306 static const char * const usb_active_groups[] = { 307 "gpio40", 308 }; 309 310 #define BCM6318_MODE_FUN(n) \ 311 { \ 312 .name = #n, \ 313 .groups = n##_groups, \ 314 .num_groups = ARRAY_SIZE(n##_groups), \ 315 .mode_val = 1, \ 316 } 317 318 #define BCM6318_MUX_FUN(n, mux) \ 319 { \ 320 .name = #n, \ 321 .groups = n##_groups, \ 322 .num_groups = ARRAY_SIZE(n##_groups), \ 323 .mux_val = mux, \ 324 } 325 326 static const struct bcm6318_function bcm6318_funcs[] = { 327 BCM6318_MODE_FUN(led), 328 BCM6318_MUX_FUN(ephy0_spd_led, 1), 329 BCM6318_MUX_FUN(ephy1_spd_led, 1), 330 BCM6318_MUX_FUN(ephy2_spd_led, 1), 331 BCM6318_MUX_FUN(ephy3_spd_led, 1), 332 BCM6318_MUX_FUN(ephy0_act_led, 1), 333 BCM6318_MUX_FUN(ephy1_act_led, 1), 334 BCM6318_MUX_FUN(ephy2_act_led, 1), 335 BCM6318_MUX_FUN(ephy3_act_led, 1), 336 BCM6318_MUX_FUN(serial_led_data, 3), 337 BCM6318_MUX_FUN(serial_led_clk, 3), 338 BCM6318_MUX_FUN(inet_act_led, 1), 339 BCM6318_MUX_FUN(inet_fail_led, 1), 340 BCM6318_MUX_FUN(dsl_led, 1), 341 BCM6318_MUX_FUN(post_fail_led, 1), 342 BCM6318_MUX_FUN(wlan_wps_led, 1), 343 BCM6318_MUX_FUN(usb_pwron, 1), 344 BCM6318_MUX_FUN(usb_device_led, 2), 345 BCM6318_MUX_FUN(usb_active, 2), 346 }; 347 348 static inline unsigned int bcm6318_mux_off(unsigned int pin) 349 { 350 return BCM6318_MUX_REG + (pin / 16) * 4; 351 } 352 353 static inline unsigned int bcm6318_pad_off(unsigned int pin) 354 { 355 return BCM6318_PAD_REG + (pin / 8) * 4; 356 } 357 358 static int bcm6318_pinctrl_get_group_count(struct pinctrl_dev *pctldev) 359 { 360 return ARRAY_SIZE(bcm6318_groups); 361 } 362 363 static const char *bcm6318_pinctrl_get_group_name(struct pinctrl_dev *pctldev, 364 unsigned group) 365 { 366 return bcm6318_groups[group].name; 367 } 368 369 static int bcm6318_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, 370 unsigned group, const unsigned **pins, 371 unsigned *num_pins) 372 { 373 *pins = bcm6318_groups[group].pins; 374 *num_pins = bcm6318_groups[group].num_pins; 375 376 return 0; 377 } 378 379 static int bcm6318_pinctrl_get_func_count(struct pinctrl_dev *pctldev) 380 { 381 return ARRAY_SIZE(bcm6318_funcs); 382 } 383 384 static const char *bcm6318_pinctrl_get_func_name(struct pinctrl_dev *pctldev, 385 unsigned selector) 386 { 387 return bcm6318_funcs[selector].name; 388 } 389 390 static int bcm6318_pinctrl_get_groups(struct pinctrl_dev *pctldev, 391 unsigned selector, 392 const char * const **groups, 393 unsigned * const num_groups) 394 { 395 *groups = bcm6318_funcs[selector].groups; 396 *num_groups = bcm6318_funcs[selector].num_groups; 397 398 return 0; 399 } 400 401 static inline void bcm6318_rmw_mux(struct bcm63xx_pinctrl *pc, unsigned pin, 402 unsigned int mode, unsigned int mux) 403 { 404 if (pin < BCM63XX_BANK_GPIOS) 405 regmap_update_bits(pc->regs, BCM6318_MODE_REG, BIT(pin), 406 mode ? BIT(pin) : 0); 407 408 if (pin < BCM6318_NUM_MUX) 409 regmap_update_bits(pc->regs, 410 bcm6318_mux_off(pin), 411 BCM6328_MUX_MASK << ((pin % 16) * 2), 412 mux << ((pin % 16) * 2)); 413 } 414 415 static inline void bcm6318_set_pad(struct bcm63xx_pinctrl *pc, unsigned pin, 416 uint8_t val) 417 { 418 regmap_update_bits(pc->regs, bcm6318_pad_off(pin), 419 BCM6328_PAD_MASK << ((pin % 8) * 4), 420 val << ((pin % 8) * 4)); 421 } 422 423 static int bcm6318_pinctrl_set_mux(struct pinctrl_dev *pctldev, 424 unsigned selector, unsigned group) 425 { 426 struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); 427 const struct bcm6318_pingroup *pg = &bcm6318_groups[group]; 428 const struct bcm6318_function *f = &bcm6318_funcs[selector]; 429 430 bcm6318_rmw_mux(pc, pg->pins[0], f->mode_val, f->mux_val); 431 432 return 0; 433 } 434 435 static int bcm6318_gpio_request_enable(struct pinctrl_dev *pctldev, 436 struct pinctrl_gpio_range *range, 437 unsigned offset) 438 { 439 struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); 440 441 /* disable all functions using this pin */ 442 if (offset < 13) { 443 /* GPIOs 0-12 use mux 0 as GPIO function */ 444 bcm6318_rmw_mux(pc, offset, 0, 0); 445 } else if (offset < 42) { 446 /* GPIOs 13-41 use mux 3 as GPIO function */ 447 bcm6318_rmw_mux(pc, offset, 0, 3); 448 449 bcm6318_set_pad(pc, offset, 0); 450 } 451 452 return 0; 453 } 454 455 static const struct pinctrl_ops bcm6318_pctl_ops = { 456 .dt_free_map = pinctrl_utils_free_map, 457 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, 458 .get_group_name = bcm6318_pinctrl_get_group_name, 459 .get_group_pins = bcm6318_pinctrl_get_group_pins, 460 .get_groups_count = bcm6318_pinctrl_get_group_count, 461 }; 462 463 static struct pinmux_ops bcm6318_pmx_ops = { 464 .get_function_groups = bcm6318_pinctrl_get_groups, 465 .get_function_name = bcm6318_pinctrl_get_func_name, 466 .get_functions_count = bcm6318_pinctrl_get_func_count, 467 .gpio_request_enable = bcm6318_gpio_request_enable, 468 .set_mux = bcm6318_pinctrl_set_mux, 469 .strict = true, 470 }; 471 472 static const struct bcm63xx_pinctrl_soc bcm6318_soc = { 473 .ngpios = BCM6318_NUM_GPIOS, 474 .npins = ARRAY_SIZE(bcm6318_pins), 475 .pctl_ops = &bcm6318_pctl_ops, 476 .pins = bcm6318_pins, 477 .pmx_ops = &bcm6318_pmx_ops, 478 }; 479 480 static int bcm6318_pinctrl_probe(struct platform_device *pdev) 481 { 482 return bcm63xx_pinctrl_probe(pdev, &bcm6318_soc, NULL); 483 } 484 485 static const struct of_device_id bcm6318_pinctrl_match[] = { 486 { .compatible = "brcm,bcm6318-pinctrl", }, 487 { /* sentinel */ } 488 }; 489 490 static struct platform_driver bcm6318_pinctrl_driver = { 491 .probe = bcm6318_pinctrl_probe, 492 .driver = { 493 .name = "bcm6318-pinctrl", 494 .of_match_table = bcm6318_pinctrl_match, 495 }, 496 }; 497 498 builtin_platform_driver(bcm6318_pinctrl_driver); 499