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