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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 | // SPDX-License-Identifier: GPL-2.0+ /* * Driver for BCM6368 GPIO unit (pinctrl + GPIO) * * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com> * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com> */ #include <linux/bits.h> #include <linux/gpio/driver.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/pinctrl/pinmux.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include "../pinctrl-utils.h" #include "pinctrl-bcm63xx.h" #define BCM6368_NUM_GPIOS 38 #define BCM6368_MODE_REG 0x18 #define BCM6368_BASEMODE_REG 0x38 #define BCM6368_BASEMODE_MASK 0x7 #define BCM6368_BASEMODE_GPIO 0x0 #define BCM6368_BASEMODE_UART1 0x1 struct bcm6368_function { const char *name; const char * const *groups; const unsigned num_groups; unsigned dir_out:16; unsigned basemode:3; }; struct bcm6368_priv { struct regmap_field *overlays; }; #define BCM6368_BASEMODE_PIN(a, b) \ { \ .number = a, \ .name = b, \ .drv_data = (void *)true \ } static const struct pinctrl_pin_desc bcm6368_pins[] = { PINCTRL_PIN(0, "gpio0"), PINCTRL_PIN(1, "gpio1"), PINCTRL_PIN(2, "gpio2"), PINCTRL_PIN(3, "gpio3"), PINCTRL_PIN(4, "gpio4"), PINCTRL_PIN(5, "gpio5"), PINCTRL_PIN(6, "gpio6"), PINCTRL_PIN(7, "gpio7"), PINCTRL_PIN(8, "gpio8"), PINCTRL_PIN(9, "gpio9"), PINCTRL_PIN(10, "gpio10"), PINCTRL_PIN(11, "gpio11"), PINCTRL_PIN(12, "gpio12"), PINCTRL_PIN(13, "gpio13"), PINCTRL_PIN(14, "gpio14"), PINCTRL_PIN(15, "gpio15"), PINCTRL_PIN(16, "gpio16"), PINCTRL_PIN(17, "gpio17"), PINCTRL_PIN(18, "gpio18"), PINCTRL_PIN(19, "gpio19"), PINCTRL_PIN(20, "gpio20"), PINCTRL_PIN(21, "gpio21"), PINCTRL_PIN(22, "gpio22"), PINCTRL_PIN(23, "gpio23"), PINCTRL_PIN(24, "gpio24"), PINCTRL_PIN(25, "gpio25"), PINCTRL_PIN(26, "gpio26"), PINCTRL_PIN(27, "gpio27"), PINCTRL_PIN(28, "gpio28"), PINCTRL_PIN(29, "gpio29"), BCM6368_BASEMODE_PIN(30, "gpio30"), BCM6368_BASEMODE_PIN(31, "gpio31"), BCM6368_BASEMODE_PIN(32, "gpio32"), BCM6368_BASEMODE_PIN(33, "gpio33"), PINCTRL_PIN(34, "gpio34"), PINCTRL_PIN(35, "gpio35"), PINCTRL_PIN(36, "gpio36"), PINCTRL_PIN(37, "gpio37"), }; static unsigned gpio0_pins[] = { 0 }; static unsigned gpio1_pins[] = { 1 }; static unsigned gpio2_pins[] = { 2 }; static unsigned gpio3_pins[] = { 3 }; static unsigned gpio4_pins[] = { 4 }; static unsigned gpio5_pins[] = { 5 }; static unsigned gpio6_pins[] = { 6 }; static unsigned gpio7_pins[] = { 7 }; static unsigned gpio8_pins[] = { 8 }; static unsigned gpio9_pins[] = { 9 }; static unsigned gpio10_pins[] = { 10 }; static unsigned gpio11_pins[] = { 11 }; static unsigned gpio12_pins[] = { 12 }; static unsigned gpio13_pins[] = { 13 }; static unsigned gpio14_pins[] = { 14 }; static unsigned gpio15_pins[] = { 15 }; static unsigned gpio16_pins[] = { 16 }; static unsigned gpio17_pins[] = { 17 }; static unsigned gpio18_pins[] = { 18 }; static unsigned gpio19_pins[] = { 19 }; static unsigned gpio20_pins[] = { 20 }; static unsigned gpio21_pins[] = { 21 }; static unsigned gpio22_pins[] = { 22 }; static unsigned gpio23_pins[] = { 23 }; static unsigned gpio24_pins[] = { 24 }; static unsigned gpio25_pins[] = { 25 }; static unsigned gpio26_pins[] = { 26 }; static unsigned gpio27_pins[] = { 27 }; static unsigned gpio28_pins[] = { 28 }; static unsigned gpio29_pins[] = { 29 }; static unsigned gpio30_pins[] = { 30 }; static unsigned gpio31_pins[] = { 31 }; static unsigned uart1_grp_pins[] = { 30, 31, 32, 33 }; static struct pingroup bcm6368_groups[] = { BCM_PIN_GROUP(gpio0), BCM_PIN_GROUP(gpio1), BCM_PIN_GROUP(gpio2), BCM_PIN_GROUP(gpio3), BCM_PIN_GROUP(gpio4), BCM_PIN_GROUP(gpio5), BCM_PIN_GROUP(gpio6), BCM_PIN_GROUP(gpio7), BCM_PIN_GROUP(gpio8), BCM_PIN_GROUP(gpio9), BCM_PIN_GROUP(gpio10), BCM_PIN_GROUP(gpio11), BCM_PIN_GROUP(gpio12), BCM_PIN_GROUP(gpio13), BCM_PIN_GROUP(gpio14), BCM_PIN_GROUP(gpio15), BCM_PIN_GROUP(gpio16), BCM_PIN_GROUP(gpio17), BCM_PIN_GROUP(gpio18), BCM_PIN_GROUP(gpio19), BCM_PIN_GROUP(gpio20), BCM_PIN_GROUP(gpio21), BCM_PIN_GROUP(gpio22), BCM_PIN_GROUP(gpio23), BCM_PIN_GROUP(gpio24), BCM_PIN_GROUP(gpio25), BCM_PIN_GROUP(gpio26), BCM_PIN_GROUP(gpio27), BCM_PIN_GROUP(gpio28), BCM_PIN_GROUP(gpio29), BCM_PIN_GROUP(gpio30), BCM_PIN_GROUP(gpio31), BCM_PIN_GROUP(uart1_grp), }; static const char * const analog_afe_0_groups[] = { "gpio0", }; static const char * const analog_afe_1_groups[] = { "gpio1", }; static const char * const sys_irq_groups[] = { "gpio2", }; static const char * const serial_led_data_groups[] = { "gpio3", }; static const char * const serial_led_clk_groups[] = { "gpio4", }; static const char * const inet_led_groups[] = { "gpio5", }; static const char * const ephy0_led_groups[] = { "gpio6", }; static const char * const ephy1_led_groups[] = { "gpio7", }; static const char * const ephy2_led_groups[] = { "gpio8", }; static const char * const ephy3_led_groups[] = { "gpio9", }; static const char * const robosw_led_data_groups[] = { "gpio10", }; static const char * const robosw_led_clk_groups[] = { "gpio11", }; static const char * const robosw_led0_groups[] = { "gpio12", }; static const char * const robosw_led1_groups[] = { "gpio13", }; static const char * const usb_device_led_groups[] = { "gpio14", }; static const char * const pci_req1_groups[] = { "gpio16", }; static const char * const pci_gnt1_groups[] = { "gpio17", }; static const char * const pci_intb_groups[] = { "gpio18", }; static const char * const pci_req0_groups[] = { "gpio19", }; static const char * const pci_gnt0_groups[] = { "gpio20", }; static const char * const pcmcia_cd1_groups[] = { "gpio22", }; static const char * const pcmcia_cd2_groups[] = { "gpio23", }; static const char * const pcmcia_vs1_groups[] = { "gpio24", }; static const char * const pcmcia_vs2_groups[] = { "gpio25", }; static const char * const ebi_cs2_groups[] = { "gpio26", }; static const char * const ebi_cs3_groups[] = { "gpio27", }; static const char * const spi_cs2_groups[] = { "gpio28", }; static const char * const spi_cs3_groups[] = { "gpio29", }; static const char * const spi_cs4_groups[] = { "gpio30", }; static const char * const spi_cs5_groups[] = { "gpio31", }; static const char * const uart1_groups[] = { "uart1_grp", }; #define BCM6368_FUN(n, out) \ { \ .name = #n, \ .groups = n##_groups, \ .num_groups = ARRAY_SIZE(n##_groups), \ .dir_out = out, \ } #define BCM6368_BASEMODE_FUN(n, val, out) \ { \ .name = #n, \ .groups = n##_groups, \ .num_groups = ARRAY_SIZE(n##_groups), \ .basemode = BCM6368_BASEMODE_##val, \ .dir_out = out, \ } static const struct bcm6368_function bcm6368_funcs[] = { BCM6368_FUN(analog_afe_0, 1), BCM6368_FUN(analog_afe_1, 1), BCM6368_FUN(sys_irq, 1), BCM6368_FUN(serial_led_data, 1), BCM6368_FUN(serial_led_clk, 1), BCM6368_FUN(inet_led, 1), BCM6368_FUN(ephy0_led, 1), BCM6368_FUN(ephy1_led, 1), BCM6368_FUN(ephy2_led, 1), BCM6368_FUN(ephy3_led, 1), BCM6368_FUN(robosw_led_data, 1), BCM6368_FUN(robosw_led_clk, 1), BCM6368_FUN(robosw_led0, 1), BCM6368_FUN(robosw_led1, 1), BCM6368_FUN(usb_device_led, 1), BCM6368_FUN(pci_req1, 0), BCM6368_FUN(pci_gnt1, 0), BCM6368_FUN(pci_intb, 0), BCM6368_FUN(pci_req0, 0), BCM6368_FUN(pci_gnt0, 0), BCM6368_FUN(pcmcia_cd1, 0), BCM6368_FUN(pcmcia_cd2, 0), BCM6368_FUN(pcmcia_vs1, 0), BCM6368_FUN(pcmcia_vs2, 0), BCM6368_FUN(ebi_cs2, 1), BCM6368_FUN(ebi_cs3, 1), BCM6368_FUN(spi_cs2, 1), BCM6368_FUN(spi_cs3, 1), BCM6368_FUN(spi_cs4, 1), BCM6368_FUN(spi_cs5, 1), BCM6368_BASEMODE_FUN(uart1, UART1, 0x6), }; static int bcm6368_pinctrl_get_group_count(struct pinctrl_dev *pctldev) { return ARRAY_SIZE(bcm6368_groups); } static const char *bcm6368_pinctrl_get_group_name(struct pinctrl_dev *pctldev, unsigned group) { return bcm6368_groups[group].name; } static int bcm6368_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, const unsigned **pins, unsigned *npins) { *pins = bcm6368_groups[group].pins; *npins = bcm6368_groups[group].npins; return 0; } static int bcm6368_pinctrl_get_func_count(struct pinctrl_dev *pctldev) { return ARRAY_SIZE(bcm6368_funcs); } static const char *bcm6368_pinctrl_get_func_name(struct pinctrl_dev *pctldev, unsigned selector) { return bcm6368_funcs[selector].name; } static int bcm6368_pinctrl_get_groups(struct pinctrl_dev *pctldev, unsigned selector, const char * const **groups, unsigned * const num_groups) { *groups = bcm6368_funcs[selector].groups; *num_groups = bcm6368_funcs[selector].num_groups; return 0; } static int bcm6368_pinctrl_set_mux(struct pinctrl_dev *pctldev, unsigned selector, unsigned group) { struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); struct bcm6368_priv *priv = pc->driver_data; const struct pingroup *pg = &bcm6368_groups[group]; const struct bcm6368_function *fun = &bcm6368_funcs[selector]; int i, pin; if (fun->basemode) { unsigned int mask = 0; for (i = 0; i < pg->npins; i++) { pin = pg->pins[i]; if (pin < BCM63XX_BANK_GPIOS) mask |= BIT(pin); } regmap_update_bits(pc->regs, BCM6368_MODE_REG, mask, 0); regmap_field_write(priv->overlays, fun->basemode); } else { pin = pg->pins[0]; if (bcm6368_pins[pin].drv_data) regmap_field_write(priv->overlays, BCM6368_BASEMODE_GPIO); regmap_update_bits(pc->regs, BCM6368_MODE_REG, BIT(pin), BIT(pin)); } for (pin = 0; pin < pg->npins; pin++) { struct pinctrl_gpio_range *range; int hw_gpio = bcm6368_pins[pin].number; range = pinctrl_find_gpio_range_from_pin(pctldev, hw_gpio); if (range) { struct gpio_chip *gc = range->gc; if (fun->dir_out & BIT(pin)) gc->direction_output(gc, hw_gpio, 0); else gc->direction_input(gc, hw_gpio); } } return 0; } static int bcm6368_gpio_request_enable(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned offset) { struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); struct bcm6368_priv *priv = pc->driver_data; if (offset >= BCM63XX_BANK_GPIOS && !bcm6368_pins[offset].drv_data) return 0; /* disable all functions using this pin */ if (offset < BCM63XX_BANK_GPIOS) regmap_update_bits(pc->regs, BCM6368_MODE_REG, BIT(offset), 0); if (bcm6368_pins[offset].drv_data) regmap_field_write(priv->overlays, BCM6368_BASEMODE_GPIO); return 0; } static const struct pinctrl_ops bcm6368_pctl_ops = { .dt_free_map = pinctrl_utils_free_map, .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, .get_group_name = bcm6368_pinctrl_get_group_name, .get_group_pins = bcm6368_pinctrl_get_group_pins, .get_groups_count = bcm6368_pinctrl_get_group_count, }; static const struct pinmux_ops bcm6368_pmx_ops = { .get_function_groups = bcm6368_pinctrl_get_groups, .get_function_name = bcm6368_pinctrl_get_func_name, .get_functions_count = bcm6368_pinctrl_get_func_count, .gpio_request_enable = bcm6368_gpio_request_enable, .set_mux = bcm6368_pinctrl_set_mux, .strict = true, }; static const struct bcm63xx_pinctrl_soc bcm6368_soc = { .ngpios = BCM6368_NUM_GPIOS, .npins = ARRAY_SIZE(bcm6368_pins), .pctl_ops = &bcm6368_pctl_ops, .pins = bcm6368_pins, .pmx_ops = &bcm6368_pmx_ops, }; static int bcm6368_pinctrl_probe(struct platform_device *pdev) { struct reg_field overlays = REG_FIELD(BCM6368_BASEMODE_REG, 0, 15); struct device *dev = &pdev->dev; struct bcm63xx_pinctrl *pc; struct bcm6368_priv *priv; int err; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; err = bcm63xx_pinctrl_probe(pdev, &bcm6368_soc, (void *) priv); if (err) return err; pc = platform_get_drvdata(pdev); priv->overlays = devm_regmap_field_alloc(dev, pc->regs, overlays); if (IS_ERR(priv->overlays)) return PTR_ERR(priv->overlays); return 0; } static const struct of_device_id bcm6368_pinctrl_match[] = { { .compatible = "brcm,bcm6368-pinctrl", }, { /* sentinel */ } }; static struct platform_driver bcm6368_pinctrl_driver = { .probe = bcm6368_pinctrl_probe, .driver = { .name = "bcm6368-pinctrl", .of_match_table = bcm6368_pinctrl_match, }, }; builtin_platform_driver(bcm6368_pinctrl_driver); |