--- /dev/null
+From 393e9753f6492c1fdf55891ddee60d955ae8b119 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Fri, 24 Jun 2016 22:12:50 +0200
+Subject: [PATCH 03/16] pinctrl: add a pincontrol driver for BCM6328
+
+Add a pincontrol driver for BCM6328. BCM628 supports muxing 32 pins as
+GPIOs, as LEDs for the integrated LED controller, or various other
+functions. Its pincontrol mux registers also control other aspects, like
+switching the second USB port between host and device mode.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/pinctrl/bcm63xx/Kconfig | 7 +
+ drivers/pinctrl/bcm63xx/Makefile | 1 +
+ drivers/pinctrl/bcm63xx/pinctrl-bcm6328.c | 456 ++++++++++++++++++++++++++++++
+ 3 files changed, 464 insertions(+)
+ create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6328.c
+
+--- a/drivers/pinctrl/bcm63xx/Kconfig
++++ b/drivers/pinctrl/bcm63xx/Kconfig
+@@ -1,3 +1,10 @@
+ config PINCTRL_BRCM63XX
+ bool
+ select GPIO_GENERIC
++
++config PINCTRL_BRCM6328
++ bool "BCM6328 pincontrol driver" if COMPILE_TEST
++ select PINMUX
++ select PINCONF
++ select PINCTRL_BRCM63XX
++ select GENERIC_PINCONF
+--- a/drivers/pinctrl/bcm63xx/Makefile
++++ b/drivers/pinctrl/bcm63xx/Makefile
+@@ -1 +1,2 @@
+ obj-$(CONFIG_PINCTRL_BRCM63XX) += pinctrl-bcm63xx.o
++obj-$(CONFIG_PINCTRL_BRCM6328) += pinctrl-bcm6328.o
+--- /dev/null
++++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6328.c
+@@ -0,0 +1,456 @@
++/*
++ * 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 <jonas.gorski@gmail.com>
++ */
++
++#include <linux/bitops.h>
++#include <linux/gpio.h>
++#include <linux/kernel.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/of.h>
++#include <linux/of_gpio.h>
++#include <linux/platform_device.h>
++
++#include <linux/pinctrl/machine.h>
++#include <linux/pinctrl/pinconf.h>
++#include <linux/pinctrl/pinconf-generic.h>
++#include <linux/pinctrl/pinmux.h>
++
++#include "../core.h"
++#include "../pinctrl-utils.h"
++
++#include "pinctrl-bcm63xx.h"
++
++#define BCM6328_MUX_LO_REG 0x4
++#define BCM6328_MUX_HI_REG 0x0
++#define BCM6328_MUX_OTHER_REG 0x8
++
++#define BCM6328_NGPIO 32
++
++struct bcm6328_pingroup {
++ const char *name;
++ const unsigned * const pins;
++ const unsigned num_pins;
++};
++
++struct bcm6328_function {
++ const char *name;
++ const char * const *groups;
++ const unsigned num_groups;
++
++ unsigned mode_val:1;
++ unsigned mux_val:2;
++};
++
++struct bcm6328_pinctrl {
++ struct pinctrl_dev *pctldev;
++ struct pinctrl_desc desc;
++
++ void __iomem *mode;
++ void __iomem *mux[3];
++
++ /* register access lock */
++ spinlock_t lock;
++
++ struct gpio_chip gpio;
++};
++
++static const struct pinctrl_pin_desc bcm6328_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"),
++
++ /*
++ * No idea where they really are; so let's put them according
++ * to their mux offsets.
++ */
++ PINCTRL_PIN(36, "hsspi_cs1"),
++ PINCTRL_PIN(38, "usb_p2"),
++};
++
++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 hsspi_cs1_pins[] = { 36 };
++static unsigned usb_port1_pins[] = { 38 };
++
++#define BCM6328_GROUP(n) \
++ { \
++ .name = #n, \
++ .pins = n##_pins, \
++ .num_pins = ARRAY_SIZE(n##_pins), \
++ }
++
++static struct bcm6328_pingroup bcm6328_groups[] = {
++ BCM6328_GROUP(gpio0),
++ BCM6328_GROUP(gpio1),
++ BCM6328_GROUP(gpio2),
++ BCM6328_GROUP(gpio3),
++ BCM6328_GROUP(gpio4),
++ BCM6328_GROUP(gpio5),
++ BCM6328_GROUP(gpio6),
++ BCM6328_GROUP(gpio7),
++ BCM6328_GROUP(gpio8),
++ BCM6328_GROUP(gpio9),
++ BCM6328_GROUP(gpio10),
++ BCM6328_GROUP(gpio11),
++ BCM6328_GROUP(gpio12),
++ BCM6328_GROUP(gpio13),
++ BCM6328_GROUP(gpio14),
++ BCM6328_GROUP(gpio15),
++ BCM6328_GROUP(gpio16),
++ BCM6328_GROUP(gpio17),
++ BCM6328_GROUP(gpio18),
++ BCM6328_GROUP(gpio19),
++ BCM6328_GROUP(gpio20),
++ BCM6328_GROUP(gpio21),
++ BCM6328_GROUP(gpio22),
++ BCM6328_GROUP(gpio23),
++ BCM6328_GROUP(gpio24),
++ BCM6328_GROUP(gpio25),
++ BCM6328_GROUP(gpio26),
++ BCM6328_GROUP(gpio27),
++ BCM6328_GROUP(gpio28),
++ BCM6328_GROUP(gpio29),
++ BCM6328_GROUP(gpio30),
++ BCM6328_GROUP(gpio31),
++
++ BCM6328_GROUP(hsspi_cs1),
++ BCM6328_GROUP(usb_port1),
++};
++
++/* 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 serial_led_data_groups[] = {
++ "gpio6",
++};
++
++static const char * const serial_led_clk_groups[] = {
++ "gpio7",
++};
++
++static const char * const inet_act_led_groups[] = {
++ "gpio11",
++};
++
++static const char * const pcie_clkreq_groups[] = {
++ "gpio16",
++};
++
++static const char * const ephy0_act_led_groups[] = {
++ "gpio25",
++};
++
++static const char * const ephy1_act_led_groups[] = {
++ "gpio26",
++};
++
++static const char * const ephy2_act_led_groups[] = {
++ "gpio27",
++};
++
++static const char * const ephy3_act_led_groups[] = {
++ "gpio28",
++};
++
++static const char * const hsspi_cs1_groups[] = {
++ "hsspi_cs1"
++};
++
++static const char * const usb_host_port_groups[] = {
++ "usb_port1",
++};
++
++static const char * const usb_device_port_groups[] = {
++ "usb_port1",
++};
++
++#define BCM6328_MODE_FUN(n) \
++ { \
++ .name = #n, \
++ .groups = n##_groups, \
++ .num_groups = ARRAY_SIZE(n##_groups), \
++ .mode_val = 1, \
++ }
++
++#define BCM6328_MUX_FUN(n, mux) \
++ { \
++ .name = #n, \
++ .groups = n##_groups, \
++ .num_groups = ARRAY_SIZE(n##_groups), \
++ .mux_val = mux, \
++ }
++
++static const struct bcm6328_function bcm6328_funcs[] = {
++ BCM6328_MODE_FUN(led),
++ BCM6328_MUX_FUN(serial_led_data, 2),
++ BCM6328_MUX_FUN(serial_led_clk, 2),
++ BCM6328_MUX_FUN(inet_act_led, 1),
++ BCM6328_MUX_FUN(pcie_clkreq, 2),
++ BCM6328_MUX_FUN(ephy0_act_led, 1),
++ BCM6328_MUX_FUN(ephy1_act_led, 1),
++ BCM6328_MUX_FUN(ephy2_act_led, 1),
++ BCM6328_MUX_FUN(ephy3_act_led, 1),
++ BCM6328_MUX_FUN(hsspi_cs1, 2),
++ BCM6328_MUX_FUN(usb_host_port, 1),
++ BCM6328_MUX_FUN(usb_device_port, 2),
++};
++
++static int bcm6328_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6328_groups);
++}
++
++static const char *bcm6328_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
++ unsigned group)
++{
++ return bcm6328_groups[group].name;
++}
++
++static int bcm6328_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
++ unsigned group, const unsigned **pins,
++ unsigned *num_pins)
++{
++ *pins = bcm6328_groups[group].pins;
++ *num_pins = bcm6328_groups[group].num_pins;
++
++ return 0;
++}
++
++static int bcm6328_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6328_funcs);
++}
++
++static const char *bcm6328_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
++ unsigned selector)
++{
++ return bcm6328_funcs[selector].name;
++}
++
++static int bcm6328_pinctrl_get_groups(struct pinctrl_dev *pctldev,
++ unsigned selector,
++ const char * const **groups,
++ unsigned * const num_groups)
++{
++ *groups = bcm6328_funcs[selector].groups;
++ *num_groups = bcm6328_funcs[selector].num_groups;
++
++ return 0;
++}
++
++static void bcm6328_rmw_mux(struct bcm6328_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);
++ }
++
++ 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 int bcm6328_pinctrl_set_mux(struct pinctrl_dev *pctldev,
++ unsigned selector, unsigned group)
++{
++ struct bcm6328_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
++ const struct bcm6328_pingroup *grp = &bcm6328_groups[group];
++ const struct bcm6328_function *f = &bcm6328_funcs[selector];
++
++ bcm6328_rmw_mux(pctl, grp->pins[0], f->mode_val, f->mux_val);
++
++ return 0;
++}
++
++static int bcm6328_gpio_request_enable(struct pinctrl_dev *pctldev,
++ struct pinctrl_gpio_range *range,
++ unsigned offset)
++{
++ struct bcm6328_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
++
++ /* disable all functions using this pin */
++ bcm6328_rmw_mux(pctl, offset, 0, 0);
++
++ return 0;
++}
++
++static struct pinctrl_ops bcm6328_pctl_ops = {
++ .get_groups_count = bcm6328_pinctrl_get_group_count,
++ .get_group_name = bcm6328_pinctrl_get_group_name,
++ .get_group_pins = bcm6328_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 bcm6328_pmx_ops = {
++ .get_functions_count = bcm6328_pinctrl_get_func_count,
++ .get_function_name = bcm6328_pinctrl_get_func_name,
++ .get_function_groups = bcm6328_pinctrl_get_groups,
++ .set_mux = bcm6328_pinctrl_set_mux,
++ .gpio_request_enable = bcm6328_gpio_request_enable,
++ .strict = true,
++};
++
++static int bcm6328_pinctrl_probe(struct platform_device *pdev)
++{
++ struct bcm6328_pinctrl *pctl;
++ struct resource *res;
++ void __iomem *mode, *mux;
++
++ 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);
++
++ pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
++ if (!pctl)
++ return -ENOMEM;
++
++ spin_lock_init(&pctl->lock);
++
++ pctl->mode = mode;
++ pctl->mux[0] = mux + BCM6328_MUX_LO_REG;
++ pctl->mux[1] = mux + BCM6328_MUX_HI_REG;
++ pctl->mux[2] = mux + BCM6328_MUX_OTHER_REG;
++
++ pctl->desc.name = dev_name(&pdev->dev);
++ pctl->desc.owner = THIS_MODULE;
++ pctl->desc.pctlops = &bcm6328_pctl_ops;
++ pctl->desc.pmxops = &bcm6328_pmx_ops;
++
++ pctl->desc.npins = ARRAY_SIZE(bcm6328_pins);
++ pctl->desc.pins = bcm6328_pins;
++
++ platform_set_drvdata(pdev, pctl);
++
++ pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
++ &pctl->gpio, BCM6328_NGPIO);
++ if (IS_ERR(pctl->pctldev))
++ return PTR_ERR(pctl->pctldev);
++
++ return 0;
++}
++
++static const struct of_device_id bcm6328_pinctrl_match[] = {
++ { .compatible = "brcm,bcm6328-pinctrl", },
++ { },
++};
++
++static struct platform_driver bcm6328_pinctrl_driver = {
++ .probe = bcm6328_pinctrl_probe,
++ .driver = {
++ .name = "bcm6328-pinctrl",
++ .of_match_table = bcm6328_pinctrl_match,
++ },
++};
++
++builtin_platform_driver(bcm6328_pinctrl_driver);
projects / openwrt / staging / ldir.git / blobdiff