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498 lines
12 KiB
498 lines
12 KiB
// 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 <[email protected]> |
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* Copyright (C) 2016 Jonas Gorski <[email protected]> |
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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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