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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 5022#define BCM6318_NUM_MUX 4823 24#define BCM6318_MODE_REG 0x1825#define BCM6318_MUX_REG 0x1c26#define BCM6328_MUX_MASK GENMASK(1, 0)27#define BCM6318_PAD_REG 0x5428#define BCM6328_PAD_MASK GENMASK(3, 0)29 30struct 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 39static 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 92static unsigned gpio0_pins[] = { 0 };93static unsigned gpio1_pins[] = { 1 };94static unsigned gpio2_pins[] = { 2 };95static unsigned gpio3_pins[] = { 3 };96static unsigned gpio4_pins[] = { 4 };97static unsigned gpio5_pins[] = { 5 };98static unsigned gpio6_pins[] = { 6 };99static unsigned gpio7_pins[] = { 7 };100static unsigned gpio8_pins[] = { 8 };101static unsigned gpio9_pins[] = { 9 };102static unsigned gpio10_pins[] = { 10 };103static unsigned gpio11_pins[] = { 11 };104static unsigned gpio12_pins[] = { 12 };105static unsigned gpio13_pins[] = { 13 };106static unsigned gpio14_pins[] = { 14 };107static unsigned gpio15_pins[] = { 15 };108static unsigned gpio16_pins[] = { 16 };109static unsigned gpio17_pins[] = { 17 };110static unsigned gpio18_pins[] = { 18 };111static unsigned gpio19_pins[] = { 19 };112static unsigned gpio20_pins[] = { 20 };113static unsigned gpio21_pins[] = { 21 };114static unsigned gpio22_pins[] = { 22 };115static unsigned gpio23_pins[] = { 23 };116static unsigned gpio24_pins[] = { 24 };117static unsigned gpio25_pins[] = { 25 };118static unsigned gpio26_pins[] = { 26 };119static unsigned gpio27_pins[] = { 27 };120static unsigned gpio28_pins[] = { 28 };121static unsigned gpio29_pins[] = { 29 };122static unsigned gpio30_pins[] = { 30 };123static unsigned gpio31_pins[] = { 31 };124static unsigned gpio32_pins[] = { 32 };125static unsigned gpio33_pins[] = { 33 };126static unsigned gpio34_pins[] = { 34 };127static unsigned gpio35_pins[] = { 35 };128static unsigned gpio36_pins[] = { 36 };129static unsigned gpio37_pins[] = { 37 };130static unsigned gpio38_pins[] = { 38 };131static unsigned gpio39_pins[] = { 39 };132static unsigned gpio40_pins[] = { 40 };133static unsigned gpio41_pins[] = { 41 };134static unsigned gpio42_pins[] = { 42 };135static unsigned gpio43_pins[] = { 43 };136static unsigned gpio44_pins[] = { 44 };137static unsigned gpio45_pins[] = { 45 };138static unsigned gpio46_pins[] = { 46 };139static unsigned gpio47_pins[] = { 47 };140static unsigned gpio48_pins[] = { 48 };141static unsigned gpio49_pins[] = { 49 };142 143static 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 */197static 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 */225static const char * const ephy0_spd_led_groups[] = {226 "gpio0",227};228 229static const char * const ephy1_spd_led_groups[] = {230 "gpio1",231};232 233static const char * const ephy2_spd_led_groups[] = {234 "gpio2",235};236 237static const char * const ephy3_spd_led_groups[] = {238 "gpio3",239};240 241static const char * const ephy0_act_led_groups[] = {242 "gpio4",243};244 245static const char * const ephy1_act_led_groups[] = {246 "gpio5",247};248 249static const char * const ephy2_act_led_groups[] = {250 "gpio6",251};252 253static const char * const ephy3_act_led_groups[] = {254 "gpio7",255};256 257static const char * const serial_led_data_groups[] = {258 "gpio6",259};260 261static const char * const serial_led_clk_groups[] = {262 "gpio7",263};264 265static const char * const inet_act_led_groups[] = {266 "gpio8",267};268 269static const char * const inet_fail_led_groups[] = {270 "gpio9",271};272 273static const char * const dsl_led_groups[] = {274 "gpio10",275};276 277static const char * const post_fail_led_groups[] = {278 "gpio11",279};280 281static const char * const wlan_wps_led_groups[] = {282 "gpio12",283};284 285static const char * const usb_pwron_groups[] = {286 "gpio13",287};288 289static const char * const usb_device_led_groups[] = {290 "gpio13",291};292 293static 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 313static 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 335static inline unsigned int bcm6318_mux_off(unsigned int pin)336{337 return BCM6318_MUX_REG + (pin / 16) * 4;338}339 340static inline unsigned int bcm6318_pad_off(unsigned int pin)341{342 return BCM6318_PAD_REG + (pin / 8) * 4;343}344 345static int bcm6318_pinctrl_get_group_count(struct pinctrl_dev *pctldev)346{347 return ARRAY_SIZE(bcm6318_groups);348}349 350static const char *bcm6318_pinctrl_get_group_name(struct pinctrl_dev *pctldev,351 unsigned group)352{353 return bcm6318_groups[group].name;354}355 356static 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 366static int bcm6318_pinctrl_get_func_count(struct pinctrl_dev *pctldev)367{368 return ARRAY_SIZE(bcm6318_funcs);369}370 371static const char *bcm6318_pinctrl_get_func_name(struct pinctrl_dev *pctldev,372 unsigned selector)373{374 return bcm6318_funcs[selector].name;375}376 377static 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 388static 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 402static 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 410static 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 422static 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 442static 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 450static 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 459static 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 467static int bcm6318_pinctrl_probe(struct platform_device *pdev)468{469 return bcm63xx_pinctrl_probe(pdev, &bcm6318_soc, NULL);470}471 472static const struct of_device_id bcm6318_pinctrl_match[] = {473 { .compatible = "brcm,bcm6318-pinctrl", },474 { /* sentinel */ }475};476 477static 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 485builtin_platform_driver(bcm6318_pinctrl_driver);486