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- From bd9c250ef85e6f99aa5d59b21abb87d0a48f2f61 Mon Sep 17 00:00:00 2001
- From: Jonas Gorski <[email protected]>
- Date: Fri, 24 Jun 2016 22:20:39 +0200
- Subject: [PATCH 15/16] pinctrl: add a pincontrol driver for BCM6318
- Add a pincontrol driver for BCM6318. BCM6318 allows muxing most GPIOs
- to different functions. BCM6318 is similar to BCM6328 with the addition
- of a pad register, and the GPIO meaning of the mux register changes
- based on the GPIO number.
- Signed-off-by: Jonas Gorski <[email protected]>
- ---
- drivers/pinctrl/bcm63xx/Kconfig | 7 +
- drivers/pinctrl/bcm63xx/Makefile | 1 +
- drivers/pinctrl/bcm63xx/pinctrl-bcm6318.c | 564 ++++++++++++++++++++++++++++++
- 3 files changed, 572 insertions(+)
- create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6318.c
- --- a/drivers/pinctrl/bcm63xx/Kconfig
- +++ b/drivers/pinctrl/bcm63xx/Kconfig
- @@ -2,6 +2,13 @@ config PINCTRL_BCM63XX
- bool
- select GPIO_GENERIC
-
- +config PINCTRL_BCM6318
- + bool "BCM6318 pincontrol driver" if COMPILE_TEST
- + select PINMUX
- + select PINCONF
- + select PINCTRL_BCM63XX
- + select GENERIC_PINCONF
- +
- config PINCTRL_BCM6328
- bool "BCM6328 pincontrol driver" if COMPILE_TEST
- select PINMUX
- --- a/drivers/pinctrl/bcm63xx/Makefile
- +++ b/drivers/pinctrl/bcm63xx/Makefile
- @@ -1,4 +1,5 @@
- obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
- +obj-$(CONFIG_PINCTRL_BCM6318) += pinctrl-bcm6318.o
- obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
- obj-$(CONFIG_PINCTRL_BCM6348) += pinctrl-bcm6348.o
- obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o
- --- /dev/null
- +++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6318.c
- @@ -0,0 +1,564 @@
- +/*
- + * This file is subject to the terms and conditions of the GNU General Public
- + * License. See the file "COPYING" in the main directory of this archive
- + * for more details.
- + *
- + * Copyright (C) 2016 Jonas Gorski <[email protected]>
- + */
- +
- +#include <linux/kernel.h>
- +#include <linux/spinlock.h>
- +#include <linux/bitops.h>
- +#include <linux/gpio.h>
- +#include <linux/gpio/driver.h>
- +#include <linux/of.h>
- +#include <linux/of_gpio.h>
- +#include <linux/slab.h>
- +#include <linux/platform_device.h>
- +
- +#include <linux/pinctrl/pinconf.h>
- +#include <linux/pinctrl/pinconf-generic.h>
- +#include <linux/pinctrl/pinmux.h>
- +#include <linux/pinctrl/machine.h>
- +
- +#include "../core.h"
- +#include "../pinctrl-utils.h"
- +
- +#include "pinctrl-bcm63xx.h"
- +
- +#define BCM6318_NGPIO 50
- +
- +struct bcm6318_pingroup {
- + const char *name;
- + const unsigned * const pins;
- + const unsigned num_pins;
- +};
- +
- +struct bcm6318_function {
- + const char *name;
- + const char * const *groups;
- + const unsigned num_groups;
- +
- + unsigned mode_val:1;
- + unsigned mux_val:2;
- +};
- +
- +struct bcm6318_pinctrl {
- + struct pinctrl_dev *pctldev;
- + struct pinctrl_desc desc;
- +
- + void __iomem *mode;
- + void __iomem *mux[3];
- + void __iomem *pad[6];
- +
- + /* register access lock */
- + spinlock_t lock;
- +
- + struct gpio_chip gpio[2];
- +};
- +
- +static const struct pinctrl_pin_desc bcm6318_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"),
- + PINCTRL_PIN(30, "gpio30"),
- + PINCTRL_PIN(31, "gpio31"),
- + PINCTRL_PIN(32, "gpio32"),
- + PINCTRL_PIN(33, "gpio33"),
- + PINCTRL_PIN(34, "gpio34"),
- + PINCTRL_PIN(35, "gpio35"),
- + PINCTRL_PIN(36, "gpio36"),
- + PINCTRL_PIN(37, "gpio37"),
- + PINCTRL_PIN(38, "gpio38"),
- + PINCTRL_PIN(39, "gpio39"),
- + PINCTRL_PIN(40, "gpio40"),
- + PINCTRL_PIN(41, "gpio41"),
- + PINCTRL_PIN(42, "gpio42"),
- + PINCTRL_PIN(43, "gpio43"),
- + PINCTRL_PIN(44, "gpio44"),
- + PINCTRL_PIN(45, "gpio45"),
- + PINCTRL_PIN(46, "gpio46"),
- + PINCTRL_PIN(47, "gpio47"),
- + PINCTRL_PIN(48, "gpio48"),
- + PINCTRL_PIN(49, "gpio49"),
- +};
- +
- +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 gpio32_pins[] = { 32 };
- +static unsigned gpio33_pins[] = { 33 };
- +static unsigned gpio34_pins[] = { 34 };
- +static unsigned gpio35_pins[] = { 35 };
- +static unsigned gpio36_pins[] = { 36 };
- +static unsigned gpio37_pins[] = { 37 };
- +static unsigned gpio38_pins[] = { 38 };
- +static unsigned gpio39_pins[] = { 39 };
- +static unsigned gpio40_pins[] = { 40 };
- +static unsigned gpio41_pins[] = { 41 };
- +static unsigned gpio42_pins[] = { 42 };
- +static unsigned gpio43_pins[] = { 43 };
- +static unsigned gpio44_pins[] = { 44 };
- +static unsigned gpio45_pins[] = { 45 };
- +static unsigned gpio46_pins[] = { 46 };
- +static unsigned gpio47_pins[] = { 47 };
- +static unsigned gpio48_pins[] = { 48 };
- +static unsigned gpio49_pins[] = { 49 };
- +
- +#define BCM6318_GROUP(n) \
- + { \
- + .name = #n, \
- + .pins = n##_pins, \
- + .num_pins = ARRAY_SIZE(n##_pins), \
- + }
- +
- +static struct bcm6318_pingroup bcm6318_groups[] = {
- + BCM6318_GROUP(gpio0),
- + BCM6318_GROUP(gpio1),
- + BCM6318_GROUP(gpio2),
- + BCM6318_GROUP(gpio3),
- + BCM6318_GROUP(gpio4),
- + BCM6318_GROUP(gpio5),
- + BCM6318_GROUP(gpio6),
- + BCM6318_GROUP(gpio7),
- + BCM6318_GROUP(gpio8),
- + BCM6318_GROUP(gpio9),
- + BCM6318_GROUP(gpio10),
- + BCM6318_GROUP(gpio11),
- + BCM6318_GROUP(gpio12),
- + BCM6318_GROUP(gpio13),
- + BCM6318_GROUP(gpio14),
- + BCM6318_GROUP(gpio15),
- + BCM6318_GROUP(gpio16),
- + BCM6318_GROUP(gpio17),
- + BCM6318_GROUP(gpio18),
- + BCM6318_GROUP(gpio19),
- + BCM6318_GROUP(gpio20),
- + BCM6318_GROUP(gpio21),
- + BCM6318_GROUP(gpio22),
- + BCM6318_GROUP(gpio23),
- + BCM6318_GROUP(gpio24),
- + BCM6318_GROUP(gpio25),
- + BCM6318_GROUP(gpio26),
- + BCM6318_GROUP(gpio27),
- + BCM6318_GROUP(gpio28),
- + BCM6318_GROUP(gpio29),
- + BCM6318_GROUP(gpio30),
- + BCM6318_GROUP(gpio31),
- + BCM6318_GROUP(gpio32),
- + BCM6318_GROUP(gpio33),
- + BCM6318_GROUP(gpio34),
- + BCM6318_GROUP(gpio35),
- + BCM6318_GROUP(gpio36),
- + BCM6318_GROUP(gpio37),
- + BCM6318_GROUP(gpio38),
- + BCM6318_GROUP(gpio39),
- + BCM6318_GROUP(gpio40),
- + BCM6318_GROUP(gpio41),
- + BCM6318_GROUP(gpio42),
- + BCM6318_GROUP(gpio43),
- + BCM6318_GROUP(gpio44),
- + BCM6318_GROUP(gpio45),
- + BCM6318_GROUP(gpio46),
- + BCM6318_GROUP(gpio47),
- + BCM6318_GROUP(gpio48),
- + BCM6318_GROUP(gpio49),
- +};
- +
- +/* GPIO_MODE */
- +static const char * const led_groups[] = {
- + "gpio0",
- + "gpio1",
- + "gpio2",
- + "gpio3",
- + "gpio4",
- + "gpio5",
- + "gpio6",
- + "gpio7",
- + "gpio8",
- + "gpio9",
- + "gpio10",
- + "gpio11",
- + "gpio12",
- + "gpio13",
- + "gpio14",
- + "gpio15",
- + "gpio16",
- + "gpio17",
- + "gpio18",
- + "gpio19",
- + "gpio20",
- + "gpio21",
- + "gpio22",
- + "gpio23",
- +};
- +
- +/* PINMUX_SEL */
- +static const char * const ephy0_spd_led_groups[] = {
- + "gpio0",
- +};
- +
- +static const char * const ephy1_spd_led_groups[] = {
- + "gpio1",
- +};
- +
- +static const char * const ephy2_spd_led_groups[] = {
- + "gpio2",
- +};
- +
- +static const char * const ephy3_spd_led_groups[] = {
- + "gpio3",
- +};
- +
- +static const char * const ephy0_act_led_groups[] = {
- + "gpio4",
- +};
- +
- +static const char * const ephy1_act_led_groups[] = {
- + "gpio5",
- +};
- +
- +static const char * const ephy2_act_led_groups[] = {
- + "gpio6",
- +};
- +
- +static const char * const ephy3_act_led_groups[] = {
- + "gpio7",
- +};
- +
- +static const char * const serial_led_data_groups[] = {
- + "gpio6",
- +};
- +
- +static const char * const serial_led_clk_groups[] = {
- + "gpio7",
- +};
- +
- +static const char * const inet_act_led_groups[] = {
- + "gpio8",
- +};
- +
- +static const char * const inet_fail_led_groups[] = {
- + "gpio9",
- +};
- +
- +static const char * const dsl_led_groups[] = {
- + "gpio10",
- +};
- +
- +static const char * const post_fail_led_groups[] = {
- + "gpio11",
- +};
- +
- +static const char * const wlan_wps_led_groups[] = {
- + "gpio12",
- +};
- +
- +static const char * const usb_pwron_groups[] = {
- + "gpio13",
- +};
- +
- +static const char * const usb_device_led_groups[] = {
- + "gpio13",
- +};
- +
- +static const char * const usb_active_groups[] = {
- + "gpio40",
- +};
- +
- +#define BCM6318_MODE_FUN(n) \
- + { \
- + .name = #n, \
- + .groups = n##_groups, \
- + .num_groups = ARRAY_SIZE(n##_groups), \
- + .mode_val = 1, \
- + }
- +
- +#define BCM6318_MUX_FUN(n, mux) \
- + { \
- + .name = #n, \
- + .groups = n##_groups, \
- + .num_groups = ARRAY_SIZE(n##_groups), \
- + .mux_val = mux, \
- + }
- +
- +static const struct bcm6318_function bcm6318_funcs[] = {
- + BCM6318_MODE_FUN(led),
- + BCM6318_MUX_FUN(ephy0_spd_led, 1),
- + BCM6318_MUX_FUN(ephy1_spd_led, 1),
- + BCM6318_MUX_FUN(ephy2_spd_led, 1),
- + BCM6318_MUX_FUN(ephy3_spd_led, 1),
- + BCM6318_MUX_FUN(ephy0_act_led, 1),
- + BCM6318_MUX_FUN(ephy1_act_led, 1),
- + BCM6318_MUX_FUN(ephy2_act_led, 1),
- + BCM6318_MUX_FUN(ephy3_act_led, 1),
- + BCM6318_MUX_FUN(serial_led_data, 3),
- + BCM6318_MUX_FUN(serial_led_clk, 3),
- + BCM6318_MUX_FUN(inet_act_led, 1),
- + BCM6318_MUX_FUN(inet_fail_led, 1),
- + BCM6318_MUX_FUN(dsl_led, 1),
- + BCM6318_MUX_FUN(post_fail_led, 1),
- + BCM6318_MUX_FUN(wlan_wps_led, 1),
- + BCM6318_MUX_FUN(usb_pwron, 1),
- + BCM6318_MUX_FUN(usb_device_led, 2),
- + BCM6318_MUX_FUN(usb_active, 2),
- +};
- +
- +static int bcm6318_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
- +{
- + return ARRAY_SIZE(bcm6318_groups);
- +}
- +
- +static const char *bcm6318_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
- + unsigned group)
- +{
- + return bcm6318_groups[group].name;
- +}
- +
- +static int bcm6318_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
- + unsigned group, const unsigned **pins,
- + unsigned *num_pins)
- +{
- + *pins = bcm6318_groups[group].pins;
- + *num_pins = bcm6318_groups[group].num_pins;
- +
- + return 0;
- +}
- +
- +static int bcm6318_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
- +{
- + return ARRAY_SIZE(bcm6318_funcs);
- +}
- +
- +static const char *bcm6318_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
- + unsigned selector)
- +{
- + return bcm6318_funcs[selector].name;
- +}
- +
- +static int bcm6318_pinctrl_get_groups(struct pinctrl_dev *pctldev,
- + unsigned selector,
- + const char * const **groups,
- + unsigned * const num_groups)
- +{
- + *groups = bcm6318_funcs[selector].groups;
- + *num_groups = bcm6318_funcs[selector].num_groups;
- +
- + return 0;
- +}
- +
- +static void bcm6318_rmw_mux(struct bcm6318_pinctrl *pctl, unsigned pin,
- + u32 mode, u32 mux)
- +{
- + unsigned long flags;
- + u32 reg;
- +
- + spin_lock_irqsave(&pctl->lock, flags);
- + if (pin < 32) {
- + reg = __raw_readl(pctl->mode);
- + reg &= ~BIT(pin);
- + if (mode)
- + reg |= BIT(pin);
- + __raw_writel(reg, pctl->mode);
- + }
- +
- + if (pin < 48) {
- + reg = __raw_readl(pctl->mux[pin / 16]);
- + reg &= ~(3UL << ((pin % 16) * 2));
- + reg |= mux << ((pin % 16) * 2);
- + __raw_writel(reg, pctl->mux[pin / 16]);
- + }
- + spin_unlock_irqrestore(&pctl->lock, flags);
- +}
- +
- +static void bcm6318_set_pad(struct bcm6318_pinctrl *pctl, unsigned pin, u8 val)
- +{
- + unsigned long flags;
- + u32 reg;
- +
- + spin_lock_irqsave(&pctl->lock, flags);
- + reg = __raw_readl(pctl->pad[pin / 8]);
- + reg &= ~(0xfUL << ((pin % 8) * 4));
- + reg |= val << ((pin % 8) * 4);
- + __raw_writel(reg, pctl->pad[pin / 8]);
- + spin_unlock_irqrestore(&pctl->lock, flags);
- +}
- +
- +static int bcm6318_pinctrl_set_mux(struct pinctrl_dev *pctldev,
- + unsigned selector, unsigned group)
- +{
- + struct bcm6318_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
- + const struct bcm6318_pingroup *grp = &bcm6318_groups[group];
- + const struct bcm6318_function *f = &bcm6318_funcs[selector];
- +
- + bcm6318_rmw_mux(pctl, grp->pins[0], f->mode_val, f->mux_val);
- +
- + return 0;
- +}
- +
- +static int bcm6318_gpio_request_enable(struct pinctrl_dev *pctldev,
- + struct pinctrl_gpio_range *range,
- + unsigned offset)
- +{
- + struct bcm6318_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
- +
- + /* disable all functions using this pin */
- + if (offset < 13) {
- + /* GPIOs 0-12 use mux 0 as GPIO function */
- + bcm6318_rmw_mux(pctl, offset, 0, 0);
- + } else if (offset < 42) {
- + /* GPIOs 13-41 use mux 3 as GPIO function */
- + bcm6318_rmw_mux(pctl, offset, 0, 3);
- +
- + /* FIXME: revert to old value for non gpio? */
- + bcm6318_set_pad(pctl, offset, 0);
- + } else {
- + /* no idea, really */
- + }
- +
- + return 0;
- +}
- +
- +static struct pinctrl_ops bcm6318_pctl_ops = {
- + .get_groups_count = bcm6318_pinctrl_get_group_count,
- + .get_group_name = bcm6318_pinctrl_get_group_name,
- + .get_group_pins = bcm6318_pinctrl_get_group_pins,
- +#ifdef CONFIG_OF
- + .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
- + .dt_free_map = pinctrl_utils_free_map,
- +#endif
- +};
- +
- +static struct pinmux_ops bcm6318_pmx_ops = {
- + .get_functions_count = bcm6318_pinctrl_get_func_count,
- + .get_function_name = bcm6318_pinctrl_get_func_name,
- + .get_function_groups = bcm6318_pinctrl_get_groups,
- + .set_mux = bcm6318_pinctrl_set_mux,
- + .gpio_request_enable = bcm6318_gpio_request_enable,
- + .strict = true,
- +};
- +
- +static int bcm6318_pinctrl_probe(struct platform_device *pdev)
- +{
- + struct bcm6318_pinctrl *pctl;
- + struct resource *res;
- + void __iomem *mode, *mux, *pad;
- + unsigned i;
- +
- + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mode");
- + mode = devm_ioremap_resource(&pdev->dev, res);
- + if (IS_ERR(mode))
- + return PTR_ERR(mode);
- +
- + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mux");
- + mux = devm_ioremap_resource(&pdev->dev, res);
- + if (IS_ERR(mux))
- + return PTR_ERR(mux);
- +
- + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pad");
- + pad = devm_ioremap_resource(&pdev->dev, res);
- + if (IS_ERR(pad))
- + return PTR_ERR(pad);
- +
- + pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
- + if (!pctl)
- + return -ENOMEM;
- +
- + spin_lock_init(&pctl->lock);
- +
- + pctl->mode = mode;
- +
- + for (i = 0; i < 3; i++)
- + pctl->mux[i] = mux + (i * 4);
- +
- + for (i = 0; i < 6; i++)
- + pctl->pad[i] = pad + (i * 4);
- +
- + pctl->desc.name = dev_name(&pdev->dev);
- + pctl->desc.owner = THIS_MODULE;
- + pctl->desc.pctlops = &bcm6318_pctl_ops;
- + pctl->desc.pmxops = &bcm6318_pmx_ops;
- +
- + pctl->desc.npins = ARRAY_SIZE(bcm6318_pins);
- + pctl->desc.pins = bcm6318_pins;
- +
- + platform_set_drvdata(pdev, pctl);
- +
- + pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
- + pctl->gpio, BCM6318_NGPIO);
- + if (IS_ERR(pctl->pctldev))
- + return PTR_ERR(pctl->pctldev);
- +
- + return 0;
- +}
- +
- +static const struct of_device_id bcm6318_pinctrl_match[] = {
- + { .compatible = "brcm,bcm6318-pinctrl", },
- + { },
- +};
- +
- +static struct platform_driver bcm6318_pinctrl_driver = {
- + .probe = bcm6318_pinctrl_probe,
- + .driver = {
- + .name = "bcm6318-pinctrl",
- + .of_match_table = bcm6318_pinctrl_match,
- + },
- +};
- +
- +builtin_platform_driver(bcm6318_pinctrl_driver);
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