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0c68387672
These are only assigned, either directly or via the bcm63xx_pinctrl_soc struct, to the pmxops field in the pinctrl_desc struct and never modified, so make them const to allow the compiler to put them in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20210605185908.39982-3-rikard.falkeborn@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
499 lines
12 KiB
C
499 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for BCM6318 GPIO unit (pinctrl + GPIO)
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*
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* Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
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* Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
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*/
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#include <linux/bits.h>
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#include <linux/gpio/driver.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include "../pinctrl-utils.h"
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#include "pinctrl-bcm63xx.h"
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#define BCM6318_NUM_GPIOS 50
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#define BCM6318_NUM_MUX 48
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#define BCM6318_MODE_REG 0x18
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#define BCM6318_MUX_REG 0x1c
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#define BCM6328_MUX_MASK GENMASK(1, 0)
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#define BCM6318_PAD_REG 0x54
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#define BCM6328_PAD_MASK GENMASK(3, 0)
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struct bcm6318_pingroup {
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const char *name;
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const unsigned * const pins;
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const unsigned num_pins;
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};
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struct bcm6318_function {
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const char *name;
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const char * const *groups;
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const unsigned num_groups;
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unsigned mode_val:1;
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unsigned mux_val:2;
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};
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static const struct pinctrl_pin_desc bcm6318_pins[] = {
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PINCTRL_PIN(0, "gpio0"),
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PINCTRL_PIN(1, "gpio1"),
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PINCTRL_PIN(2, "gpio2"),
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PINCTRL_PIN(3, "gpio3"),
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PINCTRL_PIN(4, "gpio4"),
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PINCTRL_PIN(5, "gpio5"),
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PINCTRL_PIN(6, "gpio6"),
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PINCTRL_PIN(7, "gpio7"),
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PINCTRL_PIN(8, "gpio8"),
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PINCTRL_PIN(9, "gpio9"),
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PINCTRL_PIN(10, "gpio10"),
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PINCTRL_PIN(11, "gpio11"),
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PINCTRL_PIN(12, "gpio12"),
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PINCTRL_PIN(13, "gpio13"),
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PINCTRL_PIN(14, "gpio14"),
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PINCTRL_PIN(15, "gpio15"),
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PINCTRL_PIN(16, "gpio16"),
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PINCTRL_PIN(17, "gpio17"),
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PINCTRL_PIN(18, "gpio18"),
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PINCTRL_PIN(19, "gpio19"),
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PINCTRL_PIN(20, "gpio20"),
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PINCTRL_PIN(21, "gpio21"),
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PINCTRL_PIN(22, "gpio22"),
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PINCTRL_PIN(23, "gpio23"),
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PINCTRL_PIN(24, "gpio24"),
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PINCTRL_PIN(25, "gpio25"),
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PINCTRL_PIN(26, "gpio26"),
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PINCTRL_PIN(27, "gpio27"),
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PINCTRL_PIN(28, "gpio28"),
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PINCTRL_PIN(29, "gpio29"),
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PINCTRL_PIN(30, "gpio30"),
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PINCTRL_PIN(31, "gpio31"),
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PINCTRL_PIN(32, "gpio32"),
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PINCTRL_PIN(33, "gpio33"),
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PINCTRL_PIN(34, "gpio34"),
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PINCTRL_PIN(35, "gpio35"),
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PINCTRL_PIN(36, "gpio36"),
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PINCTRL_PIN(37, "gpio37"),
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PINCTRL_PIN(38, "gpio38"),
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PINCTRL_PIN(39, "gpio39"),
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PINCTRL_PIN(40, "gpio40"),
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PINCTRL_PIN(41, "gpio41"),
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PINCTRL_PIN(42, "gpio42"),
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PINCTRL_PIN(43, "gpio43"),
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PINCTRL_PIN(44, "gpio44"),
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PINCTRL_PIN(45, "gpio45"),
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PINCTRL_PIN(46, "gpio46"),
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PINCTRL_PIN(47, "gpio47"),
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PINCTRL_PIN(48, "gpio48"),
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PINCTRL_PIN(49, "gpio49"),
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};
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static unsigned gpio0_pins[] = { 0 };
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static unsigned gpio1_pins[] = { 1 };
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static unsigned gpio2_pins[] = { 2 };
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static unsigned gpio3_pins[] = { 3 };
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static unsigned gpio4_pins[] = { 4 };
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static unsigned gpio5_pins[] = { 5 };
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static unsigned gpio6_pins[] = { 6 };
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static unsigned gpio7_pins[] = { 7 };
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static unsigned gpio8_pins[] = { 8 };
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static unsigned gpio9_pins[] = { 9 };
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static unsigned gpio10_pins[] = { 10 };
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static unsigned gpio11_pins[] = { 11 };
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static unsigned gpio12_pins[] = { 12 };
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static unsigned gpio13_pins[] = { 13 };
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static unsigned gpio14_pins[] = { 14 };
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static unsigned gpio15_pins[] = { 15 };
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static unsigned gpio16_pins[] = { 16 };
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static unsigned gpio17_pins[] = { 17 };
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static unsigned gpio18_pins[] = { 18 };
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static unsigned gpio19_pins[] = { 19 };
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static unsigned gpio20_pins[] = { 20 };
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static unsigned gpio21_pins[] = { 21 };
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static unsigned gpio22_pins[] = { 22 };
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static unsigned gpio23_pins[] = { 23 };
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static unsigned gpio24_pins[] = { 24 };
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static unsigned gpio25_pins[] = { 25 };
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static unsigned gpio26_pins[] = { 26 };
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static unsigned gpio27_pins[] = { 27 };
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static unsigned gpio28_pins[] = { 28 };
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static unsigned gpio29_pins[] = { 29 };
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static unsigned gpio30_pins[] = { 30 };
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static unsigned gpio31_pins[] = { 31 };
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static unsigned gpio32_pins[] = { 32 };
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static unsigned gpio33_pins[] = { 33 };
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static unsigned gpio34_pins[] = { 34 };
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static unsigned gpio35_pins[] = { 35 };
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static unsigned gpio36_pins[] = { 36 };
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static unsigned gpio37_pins[] = { 37 };
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static unsigned gpio38_pins[] = { 38 };
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static unsigned gpio39_pins[] = { 39 };
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static unsigned gpio40_pins[] = { 40 };
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static unsigned gpio41_pins[] = { 41 };
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static unsigned gpio42_pins[] = { 42 };
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static unsigned gpio43_pins[] = { 43 };
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static unsigned gpio44_pins[] = { 44 };
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static unsigned gpio45_pins[] = { 45 };
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static unsigned gpio46_pins[] = { 46 };
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static unsigned gpio47_pins[] = { 47 };
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static unsigned gpio48_pins[] = { 48 };
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static unsigned gpio49_pins[] = { 49 };
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#define BCM6318_GROUP(n) \
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{ \
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.name = #n, \
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.pins = n##_pins, \
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.num_pins = ARRAY_SIZE(n##_pins), \
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}
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static struct bcm6318_pingroup bcm6318_groups[] = {
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BCM6318_GROUP(gpio0),
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BCM6318_GROUP(gpio1),
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BCM6318_GROUP(gpio2),
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BCM6318_GROUP(gpio3),
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BCM6318_GROUP(gpio4),
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BCM6318_GROUP(gpio5),
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BCM6318_GROUP(gpio6),
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BCM6318_GROUP(gpio7),
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BCM6318_GROUP(gpio8),
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BCM6318_GROUP(gpio9),
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BCM6318_GROUP(gpio10),
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BCM6318_GROUP(gpio11),
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BCM6318_GROUP(gpio12),
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BCM6318_GROUP(gpio13),
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BCM6318_GROUP(gpio14),
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BCM6318_GROUP(gpio15),
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BCM6318_GROUP(gpio16),
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BCM6318_GROUP(gpio17),
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BCM6318_GROUP(gpio18),
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BCM6318_GROUP(gpio19),
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BCM6318_GROUP(gpio20),
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BCM6318_GROUP(gpio21),
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BCM6318_GROUP(gpio22),
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BCM6318_GROUP(gpio23),
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BCM6318_GROUP(gpio24),
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BCM6318_GROUP(gpio25),
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BCM6318_GROUP(gpio26),
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BCM6318_GROUP(gpio27),
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BCM6318_GROUP(gpio28),
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BCM6318_GROUP(gpio29),
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BCM6318_GROUP(gpio30),
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BCM6318_GROUP(gpio31),
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BCM6318_GROUP(gpio32),
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BCM6318_GROUP(gpio33),
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BCM6318_GROUP(gpio34),
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BCM6318_GROUP(gpio35),
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BCM6318_GROUP(gpio36),
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BCM6318_GROUP(gpio37),
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BCM6318_GROUP(gpio38),
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BCM6318_GROUP(gpio39),
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BCM6318_GROUP(gpio40),
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BCM6318_GROUP(gpio41),
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BCM6318_GROUP(gpio42),
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BCM6318_GROUP(gpio43),
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BCM6318_GROUP(gpio44),
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BCM6318_GROUP(gpio45),
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BCM6318_GROUP(gpio46),
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BCM6318_GROUP(gpio47),
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BCM6318_GROUP(gpio48),
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BCM6318_GROUP(gpio49),
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};
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/* GPIO_MODE */
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static const char * const led_groups[] = {
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"gpio0",
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"gpio1",
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"gpio2",
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"gpio3",
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"gpio4",
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"gpio5",
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"gpio6",
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"gpio7",
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"gpio8",
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"gpio9",
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"gpio10",
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"gpio11",
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"gpio12",
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"gpio13",
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"gpio14",
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"gpio15",
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"gpio16",
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"gpio17",
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"gpio18",
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"gpio19",
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"gpio20",
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"gpio21",
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"gpio22",
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"gpio23",
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};
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/* PINMUX_SEL */
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static const char * const ephy0_spd_led_groups[] = {
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"gpio0",
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};
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static const char * const ephy1_spd_led_groups[] = {
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"gpio1",
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};
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static const char * const ephy2_spd_led_groups[] = {
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"gpio2",
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};
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static const char * const ephy3_spd_led_groups[] = {
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"gpio3",
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};
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static const char * const ephy0_act_led_groups[] = {
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"gpio4",
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};
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static const char * const ephy1_act_led_groups[] = {
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"gpio5",
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};
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static const char * const ephy2_act_led_groups[] = {
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"gpio6",
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};
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static const char * const ephy3_act_led_groups[] = {
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"gpio7",
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};
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static const char * const serial_led_data_groups[] = {
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"gpio6",
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};
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static const char * const serial_led_clk_groups[] = {
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"gpio7",
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};
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static const char * const inet_act_led_groups[] = {
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"gpio8",
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};
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static const char * const inet_fail_led_groups[] = {
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"gpio9",
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};
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static const char * const dsl_led_groups[] = {
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"gpio10",
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};
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static const char * const post_fail_led_groups[] = {
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"gpio11",
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};
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static const char * const wlan_wps_led_groups[] = {
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"gpio12",
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};
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static const char * const usb_pwron_groups[] = {
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"gpio13",
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};
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static const char * const usb_device_led_groups[] = {
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"gpio13",
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};
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static const char * const usb_active_groups[] = {
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"gpio40",
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};
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#define BCM6318_MODE_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.mode_val = 1, \
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}
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#define BCM6318_MUX_FUN(n, mux) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.mux_val = mux, \
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}
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static const struct bcm6318_function bcm6318_funcs[] = {
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BCM6318_MODE_FUN(led),
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BCM6318_MUX_FUN(ephy0_spd_led, 1),
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BCM6318_MUX_FUN(ephy1_spd_led, 1),
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BCM6318_MUX_FUN(ephy2_spd_led, 1),
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BCM6318_MUX_FUN(ephy3_spd_led, 1),
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BCM6318_MUX_FUN(ephy0_act_led, 1),
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BCM6318_MUX_FUN(ephy1_act_led, 1),
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BCM6318_MUX_FUN(ephy2_act_led, 1),
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BCM6318_MUX_FUN(ephy3_act_led, 1),
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BCM6318_MUX_FUN(serial_led_data, 3),
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BCM6318_MUX_FUN(serial_led_clk, 3),
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BCM6318_MUX_FUN(inet_act_led, 1),
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BCM6318_MUX_FUN(inet_fail_led, 1),
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BCM6318_MUX_FUN(dsl_led, 1),
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BCM6318_MUX_FUN(post_fail_led, 1),
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BCM6318_MUX_FUN(wlan_wps_led, 1),
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BCM6318_MUX_FUN(usb_pwron, 1),
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BCM6318_MUX_FUN(usb_device_led, 2),
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BCM6318_MUX_FUN(usb_active, 2),
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};
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static inline unsigned int bcm6318_mux_off(unsigned int pin)
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{
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return BCM6318_MUX_REG + (pin / 16) * 4;
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}
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static inline unsigned int bcm6318_pad_off(unsigned int pin)
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{
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return BCM6318_PAD_REG + (pin / 8) * 4;
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}
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static int bcm6318_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
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{
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return ARRAY_SIZE(bcm6318_groups);
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}
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static const char *bcm6318_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
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unsigned group)
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{
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return bcm6318_groups[group].name;
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}
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static int bcm6318_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned group, const unsigned **pins,
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unsigned *num_pins)
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{
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*pins = bcm6318_groups[group].pins;
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*num_pins = bcm6318_groups[group].num_pins;
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return 0;
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}
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static int bcm6318_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
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{
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return ARRAY_SIZE(bcm6318_funcs);
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}
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static const char *bcm6318_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
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unsigned selector)
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{
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return bcm6318_funcs[selector].name;
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}
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static int bcm6318_pinctrl_get_groups(struct pinctrl_dev *pctldev,
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unsigned selector,
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const char * const **groups,
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unsigned * const num_groups)
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{
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*groups = bcm6318_funcs[selector].groups;
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*num_groups = bcm6318_funcs[selector].num_groups;
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return 0;
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}
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static inline void bcm6318_rmw_mux(struct bcm63xx_pinctrl *pc, unsigned pin,
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unsigned int mode, unsigned int mux)
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{
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if (pin < BCM63XX_BANK_GPIOS)
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regmap_update_bits(pc->regs, BCM6318_MODE_REG, BIT(pin),
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mode ? BIT(pin) : 0);
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if (pin < BCM6318_NUM_MUX)
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regmap_update_bits(pc->regs,
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bcm6318_mux_off(pin),
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BCM6328_MUX_MASK << ((pin % 16) * 2),
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mux << ((pin % 16) * 2));
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}
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static inline void bcm6318_set_pad(struct bcm63xx_pinctrl *pc, unsigned pin,
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uint8_t val)
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{
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regmap_update_bits(pc->regs, bcm6318_pad_off(pin),
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BCM6328_PAD_MASK << ((pin % 8) * 4),
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val << ((pin % 8) * 4));
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}
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static int bcm6318_pinctrl_set_mux(struct pinctrl_dev *pctldev,
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unsigned selector, unsigned group)
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{
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struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
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const struct bcm6318_pingroup *pg = &bcm6318_groups[group];
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const struct bcm6318_function *f = &bcm6318_funcs[selector];
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bcm6318_rmw_mux(pc, pg->pins[0], f->mode_val, f->mux_val);
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return 0;
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}
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static int bcm6318_gpio_request_enable(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned offset)
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{
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struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
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/* disable all functions using this pin */
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if (offset < 13) {
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/* GPIOs 0-12 use mux 0 as GPIO function */
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bcm6318_rmw_mux(pc, offset, 0, 0);
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} else if (offset < 42) {
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/* GPIOs 13-41 use mux 3 as GPIO function */
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bcm6318_rmw_mux(pc, offset, 0, 3);
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bcm6318_set_pad(pc, offset, 0);
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}
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return 0;
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}
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static const struct pinctrl_ops bcm6318_pctl_ops = {
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.dt_free_map = pinctrl_utils_free_map,
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.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
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.get_group_name = bcm6318_pinctrl_get_group_name,
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.get_group_pins = bcm6318_pinctrl_get_group_pins,
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.get_groups_count = bcm6318_pinctrl_get_group_count,
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};
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static const struct pinmux_ops bcm6318_pmx_ops = {
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.get_function_groups = bcm6318_pinctrl_get_groups,
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.get_function_name = bcm6318_pinctrl_get_func_name,
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.get_functions_count = bcm6318_pinctrl_get_func_count,
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.gpio_request_enable = bcm6318_gpio_request_enable,
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.set_mux = bcm6318_pinctrl_set_mux,
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.strict = true,
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};
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static const struct bcm63xx_pinctrl_soc bcm6318_soc = {
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.ngpios = BCM6318_NUM_GPIOS,
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.npins = ARRAY_SIZE(bcm6318_pins),
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.pctl_ops = &bcm6318_pctl_ops,
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.pins = bcm6318_pins,
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.pmx_ops = &bcm6318_pmx_ops,
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};
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static int bcm6318_pinctrl_probe(struct platform_device *pdev)
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{
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return bcm63xx_pinctrl_probe(pdev, &bcm6318_soc, NULL);
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}
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static const struct of_device_id bcm6318_pinctrl_match[] = {
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{ .compatible = "brcm,bcm6318-pinctrl", },
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{ /* sentinel */ }
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};
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static struct platform_driver bcm6318_pinctrl_driver = {
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.probe = bcm6318_pinctrl_probe,
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.driver = {
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.name = "bcm6318-pinctrl",
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.of_match_table = bcm6318_pinctrl_match,
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},
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};
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builtin_platform_driver(bcm6318_pinctrl_driver);
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