--- /dev/null
+From 45444cb631555e2dc16b95d779b10aa075c7482e Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Fri, 24 Jun 2016 22:14:13 +0200
+Subject: [PATCH 05/16] pinctrl: add a pincontrol driver for BCM6348
+
+Add a pincotrol driver for BCM6348. BCM6348 allow muxing five groups of
+up to ten gpios into fourteen potential functions. It does not allow
+muxing individual pins. Some functions require more than one group to be
+muxed to the same function.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/pinctrl/bcm63xx/Kconfig | 7 +
+ drivers/pinctrl/bcm63xx/Makefile | 1 +
+ drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c | 391 ++++++++++++++++++++++++++++++
+ 3 files changed, 399 insertions(+)
+ create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c
+
+--- a/drivers/pinctrl/bcm63xx/Kconfig
++++ b/drivers/pinctrl/bcm63xx/Kconfig
+@@ -8,3 +8,10 @@ config PINCTRL_BCM6328
+ select PINCONF
+ select PINCTRL_BCM63XX
+ select GENERIC_PINCONF
++
++config PINCTRL_BCM6348
++ bool "BCM6348 pincontrol driver" if COMPILE_TEST
++ select PINMUX
++ select PINCONF
++ select PINCTRL_BCM63XX
++ select GENERIC_PINCONF
+--- a/drivers/pinctrl/bcm63xx/Makefile
++++ b/drivers/pinctrl/bcm63xx/Makefile
+@@ -1,2 +1,3 @@
+ obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
+ obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
++obj-$(CONFIG_PINCTRL_BCM6348) += pinctrl-bcm6348.o
+--- /dev/null
++++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c
+@@ -0,0 +1,391 @@
++/*
++ * 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/kernel.h>
++#include <linux/spinlock.h>
++#include <linux/bitops.h>
++#include <linux/gpio.h>
++#include <linux/of.h>
++#include <linux/of_gpio.h>
++#include <linux/slab.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 BCM6348_NGPIO 37
++
++#define MAX_GROUP 4
++#define PINS_PER_GROUP 8
++#define PIN_TO_GROUP(pin) (MAX_GROUP - ((pin) / PINS_PER_GROUP))
++#define GROUP_SHIFT(pin) (PIN_TO_GROUP(pin) * 4)
++#define GROUP_MASK(pin) (0xf << GROUP_SHIFT(pin))
++
++struct bcm6348_pingroup {
++ const char *name;
++ const unsigned * const pins;
++ const unsigned num_pins;
++};
++
++struct bcm6348_function {
++ const char *name;
++ const char * const *groups;
++ const unsigned num_groups;
++ unsigned int value;
++};
++
++struct bcm6348_pinctrl {
++ struct pinctrl_dev *pctldev;
++ struct pinctrl_desc desc;
++
++ void __iomem *mode;
++
++ /* register access lock */
++ spinlock_t lock;
++
++ struct gpio_chip gpio[2];
++};
++
++#define BCM6348_PIN(a, b, group) \
++ { \
++ .number = a, \
++ .name = b, \
++ .drv_data = (void *)(group), \
++ }
++
++static const struct pinctrl_pin_desc bcm6348_pins[] = {
++ BCM6348_PIN(0, "gpio0", 4),
++ BCM6348_PIN(1, "gpio1", 4),
++ BCM6348_PIN(2, "gpio2", 4),
++ BCM6348_PIN(3, "gpio3", 4),
++ BCM6348_PIN(4, "gpio4", 4),
++ BCM6348_PIN(5, "gpio5", 4),
++ BCM6348_PIN(6, "gpio6", 4),
++ BCM6348_PIN(7, "gpio7", 4),
++ BCM6348_PIN(8, "gpio8", 3),
++ BCM6348_PIN(9, "gpio9", 3),
++ BCM6348_PIN(10, "gpio10", 3),
++ BCM6348_PIN(11, "gpio11", 3),
++ BCM6348_PIN(12, "gpio12", 3),
++ BCM6348_PIN(13, "gpio13", 3),
++ BCM6348_PIN(14, "gpio14", 3),
++ BCM6348_PIN(15, "gpio15", 3),
++ BCM6348_PIN(16, "gpio16", 2),
++ BCM6348_PIN(17, "gpio17", 2),
++ BCM6348_PIN(18, "gpio18", 2),
++ BCM6348_PIN(19, "gpio19", 2),
++ BCM6348_PIN(20, "gpio20", 2),
++ BCM6348_PIN(21, "gpio21", 2),
++ BCM6348_PIN(22, "gpio22", 1),
++ BCM6348_PIN(23, "gpio23", 1),
++ BCM6348_PIN(24, "gpio24", 1),
++ BCM6348_PIN(25, "gpio25", 1),
++ BCM6348_PIN(26, "gpio26", 1),
++ BCM6348_PIN(27, "gpio27", 1),
++ BCM6348_PIN(28, "gpio28", 1),
++ BCM6348_PIN(29, "gpio29", 1),
++ BCM6348_PIN(30, "gpio30", 1),
++ BCM6348_PIN(31, "gpio31", 1),
++ BCM6348_PIN(32, "gpio32", 0),
++ BCM6348_PIN(33, "gpio33", 0),
++ BCM6348_PIN(34, "gpio34", 0),
++ BCM6348_PIN(35, "gpio35", 0),
++ BCM6348_PIN(36, "gpio36", 0),
++};
++
++enum bcm6348_muxes {
++ BCM6348_MUX_GPIO = 0,
++ BCM6348_MUX_EXT_EPHY,
++ BCM6348_MUX_MII_SNOOP,
++ BCM6348_MUX_LEGACY_LED,
++ BCM6348_MUX_MII_PCCARD,
++ BCM6348_MUX_PCI,
++ BCM6348_MUX_SPI_MASTER_UART,
++ BCM6348_MUX_EXT_MII,
++ BCM6348_MUX_UTOPIA,
++ BCM6348_MUX_DIAG,
++};
++
++static unsigned group0_pins[] = {
++ 32, 33, 34, 35, 36,
++};
++
++static unsigned group1_pins[] = {
++ 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
++};
++
++static unsigned group2_pins[] = {
++ 16, 17, 18, 19, 20, 21,
++};
++
++static unsigned group3_pins[] = {
++ 8, 9, 10, 11, 12, 13, 14, 15,
++};
++
++static unsigned group4_pins[] = {
++ 0, 1, 2, 3, 4, 5, 6, 7,
++};
++
++#define BCM6348_GROUP(n) \
++ { \
++ .name = #n, \
++ .pins = n##_pins, \
++ .num_pins = ARRAY_SIZE(n##_pins), \
++ } \
++
++static struct bcm6348_pingroup bcm6348_groups[] = {
++ BCM6348_GROUP(group0),
++ BCM6348_GROUP(group1),
++ BCM6348_GROUP(group2),
++ BCM6348_GROUP(group3),
++ BCM6348_GROUP(group4),
++};
++
++static const char * const ext_mii_groups[] = {
++ "group0",
++ "group3",
++};
++
++static const char * const ext_ephy_groups[] = {
++ "group1",
++ "group4"
++};
++
++static const char * const mii_snoop_groups[] = {
++ "group1",
++ "group4",
++};
++
++static const char * const legacy_led_groups[] = {
++ "group4",
++};
++
++static const char * const mii_pccard_groups[] = {
++ "group1",
++};
++
++static const char * const pci_groups[] = {
++ "group2",
++};
++
++static const char * const spi_master_uart_groups[] = {
++ "group1",
++};
++
++static const char * const utopia_groups[] = {
++ "group0",
++ "group1",
++ "group3",
++};
++
++static const char * const diag_groups[] = {
++ "group0",
++ "group1",
++ "group2",
++ "group4",
++};
++
++#define BCM6348_FUN(n, f) \
++ { \
++ .name = #n, \
++ .groups = n##_groups, \
++ .num_groups = ARRAY_SIZE(n##_groups), \
++ .value = BCM6348_MUX_##f, \
++ }
++
++static const struct bcm6348_function bcm6348_funcs[] = {
++ BCM6348_FUN(ext_mii, EXT_MII),
++ BCM6348_FUN(ext_ephy, EXT_EPHY),
++ BCM6348_FUN(mii_snoop, MII_SNOOP),
++ BCM6348_FUN(legacy_led, LEGACY_LED),
++ BCM6348_FUN(mii_pccard, MII_PCCARD),
++ BCM6348_FUN(pci, PCI),
++ BCM6348_FUN(spi_master_uart, SPI_MASTER_UART),
++ BCM6348_FUN(utopia, UTOPIA),
++ BCM6348_FUN(diag, DIAG),
++};
++
++static int bcm6348_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6348_groups);
++}
++
++static const char *bcm6348_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
++ unsigned group)
++{
++ return bcm6348_groups[group].name;
++}
++
++static int bcm6348_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
++ unsigned group, const unsigned **pins,
++ unsigned *num_pins)
++{
++ *pins = bcm6348_groups[group].pins;
++ *num_pins = bcm6348_groups[group].num_pins;
++
++ return 0;
++}
++
++static int bcm6348_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6348_funcs);
++}
++
++static const char *bcm6348_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
++ unsigned selector)
++{
++ return bcm6348_funcs[selector].name;
++}
++
++static int bcm6348_pinctrl_get_groups(struct pinctrl_dev *pctldev,
++ unsigned selector,
++ const char * const **groups,
++ unsigned * const num_groups)
++{
++ *groups = bcm6348_funcs[selector].groups;
++ *num_groups = bcm6348_funcs[selector].num_groups;
++
++ return 0;
++}
++
++static void bcm6348_rmw_mux(struct bcm6348_pinctrl *pctl, u32 mask, u32 val)
++{
++ unsigned long flags;
++ u32 reg;
++
++ spin_lock_irqsave(&pctl->lock, flags);
++
++ reg = __raw_readl(pctl->mode);
++ reg &= ~mask;
++ reg |= val & mask;
++ __raw_writel(reg, pctl->mode);
++
++ spin_unlock_irqrestore(&pctl->lock, flags);
++}
++
++static int bcm6348_pinctrl_set_mux(struct pinctrl_dev *pctldev,
++ unsigned selector, unsigned group)
++{
++ struct bcm6348_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
++ const struct bcm6348_pingroup *grp = &bcm6348_groups[group];
++ const struct bcm6348_function *f = &bcm6348_funcs[selector];
++ u32 mask, val;
++
++ /*
++ * pins n..(n+7) share the same group, so we only need to look at
++ * the first pin.
++ */
++ mask = GROUP_MASK(grp->pins[0]);
++ val = f->value << GROUP_SHIFT(grp->pins[0]);
++
++ bcm6348_rmw_mux(pctl, mask, val);
++
++ return 0;
++}
++
++static int bcm6348_gpio_request_enable(struct pinctrl_dev *pctldev,
++ struct pinctrl_gpio_range *range,
++ unsigned offset)
++{
++ struct bcm6348_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
++ struct pin_desc *desc;
++ u32 mask;
++
++ /* don't reconfigure if already muxed */
++ desc = pin_desc_get(pctldev, offset);
++ if (desc->mux_usecount)
++ return 0;
++
++ mask = GROUP_MASK(offset);
++
++ /* disable all functions using this pin */
++ bcm6348_rmw_mux(pctl, mask, 0);
++
++ return 0;
++}
++
++static struct pinctrl_ops bcm6348_pctl_ops = {
++ .get_groups_count = bcm6348_pinctrl_get_group_count,
++ .get_group_name = bcm6348_pinctrl_get_group_name,
++ .get_group_pins = bcm6348_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 bcm6348_pmx_ops = {
++ .get_functions_count = bcm6348_pinctrl_get_func_count,
++ .get_function_name = bcm6348_pinctrl_get_func_name,
++ .get_function_groups = bcm6348_pinctrl_get_groups,
++ .set_mux = bcm6348_pinctrl_set_mux,
++ .gpio_request_enable = bcm6348_gpio_request_enable,
++ .strict = true,
++};
++
++static int bcm6348_pinctrl_probe(struct platform_device *pdev)
++{
++ struct bcm6348_pinctrl *pctl;
++ struct resource *res;
++ void __iomem *mode;
++
++ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mode");
++ mode = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(mode))
++ return PTR_ERR(mode);
++
++ pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
++ if (!pctl)
++ return -ENOMEM;
++
++ spin_lock_init(&pctl->lock);
++
++ pctl->mode = mode;
++
++ /* disable all muxes by default */
++ __raw_writel(0, pctl->mode);
++
++ pctl->desc.name = dev_name(&pdev->dev);
++ pctl->desc.owner = THIS_MODULE;
++ pctl->desc.pctlops = &bcm6348_pctl_ops;
++ pctl->desc.pmxops = &bcm6348_pmx_ops;
++
++ pctl->desc.npins = ARRAY_SIZE(bcm6348_pins);
++ pctl->desc.pins = bcm6348_pins;
++
++ platform_set_drvdata(pdev, pctl);
++
++ pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
++ pctl->gpio, BCM6348_NGPIO);
++ if (IS_ERR(pctl->pctldev))
++ return PTR_ERR(pctl->pctldev);
++
++ return 0;
++}
++
++static const struct of_device_id bcm6348_pinctrl_match[] = {
++ { .compatible = "brcm,bcm6348-pinctrl", },
++ { },
++};
++
++static struct platform_driver bcm6348_pinctrl_driver = {
++ .probe = bcm6348_pinctrl_probe,
++ .driver = {
++ .name = "bcm6348-pinctrl",
++ .of_match_table = bcm6348_pinctrl_match,
++ },
++};
++
++builtin_platform_driver(bcm6348_pinctrl_driver);
projects / openwrt / staging / chunkeey.git / blobdiff