@@ -29,6 +29,19 @@ config PINCTRL_BCM2835
help
Say Y here to enable the Broadcom BCM2835 GPIO driver.
+config PINCTRL_BCM6328
+ bool "Broadcom BCM6328 GPIO driver"
+ depends on OF_GPIO && (BMIPS_GENERIC || COMPILE_TEST)
+ select GPIO_REGMAP
+ select GPIOLIB_IRQCHIP
+ select IRQ_DOMAIN_HIERARCHY
+ select PINMUX
+ select PINCONF
+ select GENERIC_PINCONF
+ default BMIPS_GENERIC
+ help
+ Say Y here to enable the Broadcom BCM6328 GPIO driver.
+
config PINCTRL_IPROC_GPIO
bool "Broadcom iProc GPIO (with PINCONF) driver"
depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
@@ -3,6 +3,7 @@
obj-$(CONFIG_PINCTRL_BCM281XX) += pinctrl-bcm281xx.o
obj-$(CONFIG_PINCTRL_BCM2835) += pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
obj-$(CONFIG_PINCTRL_IPROC_GPIO) += pinctrl-iproc-gpio.o
obj-$(CONFIG_PINCTRL_CYGNUS_MUX) += pinctrl-cygnus-mux.o
obj-$(CONFIG_PINCTRL_NS) += pinctrl-ns.o
new file mode 100644
@@ -0,0 +1,481 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for BCM6328 GPIO unit (pinctrl + GPIO)
+ *
+ * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
+ * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/regmap.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.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"
+
+#define MODULE_NAME "bcm6328-pinctrl"
+#define BCM6328_BANK_GPIOS 32
+#define BCM6328_NUM_GPIOS 32
+
+#define BCM6328_DIROUT_REG 0x04
+#define BCM6328_DATA_REG 0x0c
+#define BCM6328_MODE_REG 0x18
+#define BCM6328_MUX_HI_REG 0x1c
+#define BCM6328_MUX_LO_REG 0x20
+#define BCM6328_MUX_OTHER_REG 0x24
+
+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 device *dev;
+ struct regmap *regs;
+
+ struct pinctrl_dev *pctl_dev;
+ struct pinctrl_desc pctl_desc;
+ struct pinctrl_gpio_range gpio_range;
+};
+
+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_reg_mask_xlate(struct gpio_regmap *gpio,
+ unsigned int base, unsigned int offset,
+ unsigned int *reg, unsigned int *mask)
+{
+ unsigned int line = offset % gpio->ngpio_per_reg;
+ unsigned int stride = offset / gpio->ngpio_per_reg;
+
+ *reg = base - stride * gpio->reg_stride;
+ *mask = BIT(line);
+
+ return 0;
+}
+
+static inline unsigned int bcm6328_mux_off(unsigned int pin)
+{
+ static const unsigned int bcm6328_mux[] = {
+ BCM6328_MUX_LO_REG,
+ BCM6328_MUX_HI_REG,
+ BCM6328_MUX_OTHER_REG
+ };
+
+ return bcm6328_mux[pin / 16];
+}
+
+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 *pc, unsigned pin,
+ unsigned int mode, unsigned int mux)
+{
+ if (pin < BCM6328_NUM_GPIOS)
+ regmap_update_bits(pc->regs, BCM6328_MODE_REG, BIT(pin),
+ mode ? BIT(pin) : 0);
+
+ regmap_update_bits(pc->regs, bcm6328_mux_off(pin),
+ 3UL << ((pin % 16) * 2),
+ mux << ((pin % 16) * 2));
+}
+
+static int bcm6328_pinctrl_set_mux(struct pinctrl_dev *pctldev,
+ unsigned selector, unsigned group)
+{
+ struct bcm6328_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+ const struct bcm6328_pingroup *pg = &bcm6328_groups[group];
+ const struct bcm6328_function *f = &bcm6328_funcs[selector];
+
+ bcm6328_rmw_mux(pc, pg->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 *pc = pinctrl_dev_get_drvdata(pctldev);
+
+ /* disable all functions using this pin */
+ bcm6328_rmw_mux(pc, 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,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+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 device *dev = &pdev->dev;
+ struct gpio_regmap_config grc = {0};
+ struct gpio_regmap *gr;
+ struct bcm6328_pinctrl *pc;
+ int err;
+
+ pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
+ if (!pc)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, pc);
+ pc->dev = dev;
+
+ pc->regs = syscon_node_to_regmap(dev->parent->of_node);
+ if (IS_ERR(pc->regs))
+ return PTR_ERR(pc->regs);
+
+ grc.parent = dev;
+ grc.ngpio = BCM6328_NUM_GPIOS;
+ grc.ngpio_per_reg = BCM6328_BANK_GPIOS;
+ grc.regmap = pc->regs;
+ grc.reg_dat_base = BCM6328_DATA_REG;
+ grc.reg_dir_out_base = BCM6328_DIROUT_REG;
+ grc.reg_mask_xlate = bcm6328_reg_mask_xlate;
+ grc.reg_set_base = BCM6328_DATA_REG;
+ grc.reg_stride = 4;
+
+ gr = devm_gpio_regmap_register(dev, &grc);
+ err = PTR_ERR_OR_ZERO(gr);
+ if (err) {
+ dev_err(dev, "could not add GPIO chip\n");
+ return err;
+ }
+
+ pc->pctl_desc.name = MODULE_NAME;
+ pc->pctl_desc.pins = bcm6328_pins;
+ pc->pctl_desc.npins = ARRAY_SIZE(bcm6328_pins);
+ pc->pctl_desc.pctlops = &bcm6328_pctl_ops;
+ pc->pctl_desc.pmxops = &bcm6328_pmx_ops;
+ pc->pctl_desc.owner = THIS_MODULE;
+
+ pc->pctl_dev = devm_pinctrl_register(dev, &pc->pctl_desc, pc);
+ if (IS_ERR(pc->pctl_dev)) {
+ gpiochip_remove(&gr->gpio_chip);
+ return PTR_ERR(pc->pctl_dev);
+ }
+
+ pc->gpio_range.name = MODULE_NAME;
+ pc->gpio_range.npins = BCM6328_NUM_GPIOS;
+ pc->gpio_range.base = gr->gpio_chip.base;
+ pc->gpio_range.gc = &gr->gpio_chip;
+ pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
+
+ dev_info(dev, "registered\n");
+
+ 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 = MODULE_NAME,
+ .of_match_table = bcm6328_pinctrl_match,
+ },
+};
+
+builtin_platform_driver(bcm6328_pinctrl_driver);