From 90be3cb4f1a45b8be4a4ec264cd66c2f8e893fcb Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Fri, 24 Jun 2016 22:18:25 +0200 Subject: [PATCH 11/16] pinctrl: add a pincontrol driver for BCM6368 Add a pincontrol driver for BCM6368. BCM6368 allows muxing the first 32 GPIOs onto alternative functions. Not all are documented. Signed-off-by: Jonas Gorski --- drivers/pinctrl/bcm63xx/Kconfig | 15 + drivers/pinctrl/bcm63xx/Makefile | 1 + drivers/pinctrl/bcm63xx/pinctrl-bcm6368.c | 573 ++++++++++++++++++++++++++++++ 3 files changed, 589 insertions(+) create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6368.c --- a/drivers/pinctrl/bcm63xx/Kconfig +++ b/drivers/pinctrl/bcm63xx/Kconfig @@ -23,3 +23,11 @@ config PINCTRL_BCM6362 select PINCONF select PINCTRL_BCM63XX select GENERIC_PINCONF + +config PINCTRL_BCM6368 + bool "BCM6368 pincontrol driver" + select PINMUX + select PINCONF + select PINCTRL_BCM63XX + select GENERIC_PINCONF + select MFD_SYSCON --- a/drivers/pinctrl/bcm63xx/Makefile +++ b/drivers/pinctrl/bcm63xx/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o obj-$(CONFIG_PINCTRL_BCM6362) += pinctrl-bcm6362.o +obj-$(CONFIG_PINCTRL_BCM6368) += pinctrl-bcm6368.o --- /dev/null +++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6368.c @@ -0,0 +1,570 @@ +/* + * 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 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../core.h" +#include "../pinctrl-utils.h" + +#include "pinctrl-bcm63xx.h" + +#define BCM6368_NGPIO 38 + +#define BCM6368_BASEMODE_MASK 0x7 +#define BCM6368_BASEMODE_GPIO 0x0 +#define BCM6368_BASEMODE_UART1 0x1 + +struct bcm6368_pingroup { + const char *name; + const unsigned * const pins; + const unsigned num_pins; +}; + +struct bcm6368_function { + const char *name; + const char * const *groups; + const unsigned num_groups; + + unsigned dir_out:16; + unsigned basemode:3; +}; + +struct bcm6368_pinctrl { + struct pinctrl_dev *pctldev; + struct pinctrl_desc desc; + + void __iomem *mode; + struct regmap_field *overlay; + + /* register access lock */ + spinlock_t lock; + + struct gpio_chip gpio[2]; +}; + +#define BCM6368_BASEMODE_PIN(a, b) \ + { \ + .number = a, \ + .name = b, \ + .drv_data = (void *)true \ + } + +static const struct pinctrl_pin_desc bcm6368_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"), + BCM6368_BASEMODE_PIN(30, "gpio30"), + BCM6368_BASEMODE_PIN(31, "gpio31"), + BCM6368_BASEMODE_PIN(32, "gpio32"), + BCM6368_BASEMODE_PIN(33, "gpio33"), + PINCTRL_PIN(34, "gpio34"), + PINCTRL_PIN(35, "gpio35"), + PINCTRL_PIN(36, "gpio36"), + PINCTRL_PIN(37, "gpio37"), +}; + +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 uart1_grp_pins[] = { 30, 31, 32, 33 }; + +#define BCM6368_GROUP(n) \ + { \ + .name = #n, \ + .pins = n##_pins, \ + .num_pins = ARRAY_SIZE(n##_pins), \ + } + +static struct bcm6368_pingroup bcm6368_groups[] = { + BCM6368_GROUP(gpio0), + BCM6368_GROUP(gpio1), + BCM6368_GROUP(gpio2), + BCM6368_GROUP(gpio3), + BCM6368_GROUP(gpio4), + BCM6368_GROUP(gpio5), + BCM6368_GROUP(gpio6), + BCM6368_GROUP(gpio7), + BCM6368_GROUP(gpio8), + BCM6368_GROUP(gpio9), + BCM6368_GROUP(gpio10), + BCM6368_GROUP(gpio11), + BCM6368_GROUP(gpio12), + BCM6368_GROUP(gpio13), + BCM6368_GROUP(gpio14), + BCM6368_GROUP(gpio15), + BCM6368_GROUP(gpio16), + BCM6368_GROUP(gpio17), + BCM6368_GROUP(gpio18), + BCM6368_GROUP(gpio19), + BCM6368_GROUP(gpio20), + BCM6368_GROUP(gpio21), + BCM6368_GROUP(gpio22), + BCM6368_GROUP(gpio23), + BCM6368_GROUP(gpio24), + BCM6368_GROUP(gpio25), + BCM6368_GROUP(gpio26), + BCM6368_GROUP(gpio27), + BCM6368_GROUP(gpio28), + BCM6368_GROUP(gpio29), + BCM6368_GROUP(gpio30), + BCM6368_GROUP(gpio31), + BCM6368_GROUP(uart1_grp), +}; + +static const char * const analog_afe_0_groups[] = { + "gpio0", +}; + +static const char * const analog_afe_1_groups[] = { + "gpio1", +}; + +static const char * const sys_irq_groups[] = { + "gpio2", +}; + +static const char * const serial_led_data_groups[] = { + "gpio3", +}; + +static const char * const serial_led_clk_groups[] = { + "gpio4", +}; + +static const char * const inet_led_groups[] = { + "gpio5", +}; + +static const char * const ephy0_led_groups[] = { + "gpio6", +}; + +static const char * const ephy1_led_groups[] = { + "gpio7", +}; + +static const char * const ephy2_led_groups[] = { + "gpio8", +}; + +static const char * const ephy3_led_groups[] = { + "gpio9", +}; + +static const char * const robosw_led_data_groups[] = { + "gpio10", +}; + +static const char * const robosw_led_clk_groups[] = { + "gpio11", +}; + +static const char * const robosw_led0_groups[] = { + "gpio12", +}; + +static const char * const robosw_led1_groups[] = { + "gpio13", +}; + +static const char * const usb_device_led_groups[] = { + "gpio14", +}; + +static const char * const pci_req1_groups[] = { + "gpio16", +}; + +static const char * const pci_gnt1_groups[] = { + "gpio17", +}; + +static const char * const pci_intb_groups[] = { + "gpio18", +}; + +static const char * const pci_req0_groups[] = { + "gpio19", +}; + +static const char * const pci_gnt0_groups[] = { + "gpio20", +}; + +static const char * const pcmcia_cd1_groups[] = { + "gpio22", +}; + +static const char * const pcmcia_cd2_groups[] = { + "gpio23", +}; + +static const char * const pcmcia_vs1_groups[] = { + "gpio24", +}; + +static const char * const pcmcia_vs2_groups[] = { + "gpio25", +}; + +static const char * const ebi_cs2_groups[] = { + "gpio26", +}; + +static const char * const ebi_cs3_groups[] = { + "gpio27", +}; + +static const char * const spi_cs2_groups[] = { + "gpio28", +}; + +static const char * const spi_cs3_groups[] = { + "gpio29", +}; + +static const char * const spi_cs4_groups[] = { + "gpio30", +}; + +static const char * const spi_cs5_groups[] = { + "gpio31", +}; + +static const char * const uart1_groups[] = { + "uart1_grp", +}; + +#define BCM6368_FUN(n, out) \ + { \ + .name = #n, \ + .groups = n##_groups, \ + .num_groups = ARRAY_SIZE(n##_groups), \ + .dir_out = out, \ + } + +#define BCM6368_BASEMODE_FUN(n, val, out) \ + { \ + .name = #n, \ + .groups = n##_groups, \ + .num_groups = ARRAY_SIZE(n##_groups), \ + .basemode = BCM6368_BASEMODE_##val, \ + .dir_out = out, \ + } + +static const struct bcm6368_function bcm6368_funcs[] = { + BCM6368_FUN(analog_afe_0, 1), + BCM6368_FUN(analog_afe_1, 1), + BCM6368_FUN(sys_irq, 1), + BCM6368_FUN(serial_led_data, 1), + BCM6368_FUN(serial_led_clk, 1), + BCM6368_FUN(inet_led, 1), + BCM6368_FUN(ephy0_led, 1), + BCM6368_FUN(ephy1_led, 1), + BCM6368_FUN(ephy2_led, 1), + BCM6368_FUN(ephy3_led, 1), + BCM6368_FUN(robosw_led_data, 1), + BCM6368_FUN(robosw_led_clk, 1), + BCM6368_FUN(robosw_led0, 1), + BCM6368_FUN(robosw_led1, 1), + BCM6368_FUN(usb_device_led, 1), + BCM6368_FUN(pci_req1, 0), + BCM6368_FUN(pci_gnt1, 0), + BCM6368_FUN(pci_intb, 0), + BCM6368_FUN(pci_req0, 0), + BCM6368_FUN(pci_gnt0, 0), + BCM6368_FUN(pcmcia_cd1, 0), + BCM6368_FUN(pcmcia_cd2, 0), + BCM6368_FUN(pcmcia_vs1, 0), + BCM6368_FUN(pcmcia_vs2, 0), + BCM6368_FUN(ebi_cs2, 1), + BCM6368_FUN(ebi_cs3, 1), + BCM6368_FUN(spi_cs2, 1), + BCM6368_FUN(spi_cs3, 1), + BCM6368_FUN(spi_cs4, 1), + BCM6368_FUN(spi_cs5, 1), + BCM6368_BASEMODE_FUN(uart1, UART1, 0x6), +}; + +static int bcm6368_pinctrl_get_group_count(struct pinctrl_dev *pctldev) +{ + return ARRAY_SIZE(bcm6368_groups); +} + +static const char *bcm6368_pinctrl_get_group_name(struct pinctrl_dev *pctldev, + unsigned group) +{ + return bcm6368_groups[group].name; +} + +static int bcm6368_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned group, const unsigned **pins, + unsigned *num_pins) +{ + *pins = bcm6368_groups[group].pins; + *num_pins = bcm6368_groups[group].num_pins; + + return 0; +} + +static int bcm6368_pinctrl_get_func_count(struct pinctrl_dev *pctldev) +{ + return ARRAY_SIZE(bcm6368_funcs); +} + +static const char *bcm6368_pinctrl_get_func_name(struct pinctrl_dev *pctldev, + unsigned selector) +{ + return bcm6368_funcs[selector].name; +} + +static int bcm6368_pinctrl_get_groups(struct pinctrl_dev *pctldev, + unsigned selector, + const char * const **groups, + unsigned * const num_groups) +{ + *groups = bcm6368_funcs[selector].groups; + *num_groups = bcm6368_funcs[selector].num_groups; + + return 0; +} + +static void bcm6368_rmw_mux(struct bcm6368_pinctrl *pctl, void __iomem *reg, + u32 mask, u32 val) +{ + u32 tmp; + + tmp = __raw_readl(reg); + tmp &= ~mask; + tmp |= (val & mask); + __raw_writel(tmp, reg); +} + +static int bcm6368_pinctrl_set_mux(struct pinctrl_dev *pctldev, + unsigned selector, unsigned group) +{ + struct bcm6368_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + const struct bcm6368_pingroup *grp = &bcm6368_groups[group]; + const struct bcm6368_function *fun = &bcm6368_funcs[selector]; + unsigned long flags; + int i, pin; + + spin_lock_irqsave(&pctl->lock, flags); + if (fun->basemode) { + u32 mask = 0; + + for (i = 0; i < grp->num_pins; i++) { + pin = grp->pins[i]; + if (pin < 32) + mask |= BIT(pin); + } + + bcm6368_rmw_mux(pctl, pctl->mode, mask, 0); + regmap_field_write(pctl->overlay, fun->basemode); + } else { + pin = grp->pins[0]; + + if (bcm6368_pins[pin].drv_data) + regmap_field_write(pctl->overlay, + BCM6368_BASEMODE_GPIO); + + bcm6368_rmw_mux(pctl, pctl->mode, BIT(pin), BIT(pin)); + } + spin_unlock_irqrestore(&pctl->lock, flags); + + for (pin = 0; pin < grp->num_pins; pin++) { + int hw_gpio = bcm6368_pins[pin].number; + struct gpio_chip *gc = &pctl->gpio[hw_gpio / 32]; + + if (fun->dir_out & BIT(pin)) + gc->direction_output(gc, hw_gpio % 32, 0); + else + gc->direction_input(gc, hw_gpio % 32); + } + + return 0; +} + +static int bcm6368_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned offset) +{ + struct bcm6368_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + unsigned long flags; + + if (offset >= 32 && !bcm6368_pins[offset].drv_data) + return 0; + + spin_lock_irqsave(&pctl->lock, flags); + /* disable all functions using this pin */ + if (offset < 32) + bcm6368_rmw_mux(pctl, pctl->mode, BIT(offset), 0); + + if (bcm6368_pins[offset].drv_data) + regmap_field_write(pctl->overlay, BCM6368_BASEMODE_GPIO); + + spin_unlock_irqrestore(&pctl->lock, flags); + + return 0; +} + +static struct pinctrl_ops bcm6368_pctl_ops = { + .get_groups_count = bcm6368_pinctrl_get_group_count, + .get_group_name = bcm6368_pinctrl_get_group_name, + .get_group_pins = bcm6368_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 bcm6368_pmx_ops = { + .get_functions_count = bcm6368_pinctrl_get_func_count, + .get_function_name = bcm6368_pinctrl_get_func_name, + .get_function_groups = bcm6368_pinctrl_get_groups, + .set_mux = bcm6368_pinctrl_set_mux, + .gpio_request_enable = bcm6368_gpio_request_enable, + .strict = true, +}; + +static int bcm6368_pinctrl_probe(struct platform_device *pdev) +{ + struct bcm6368_pinctrl *pctl; + struct resource *res; + void __iomem *mode; + struct regmap *basemode; + struct reg_field overlay = REG_FIELD(0, 0, 3); + + basemode = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "brcm,gpiobasemode"); + + if (IS_ERR(basemode)) + return PTR_ERR(basemode); + + 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; + + pctl->overlay = devm_regmap_field_alloc(&pdev->dev, basemode, overlay); + if (IS_ERR(pctl->overlay)) + return PTR_ERR(pctl->overlay); + + 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 = &bcm6368_pctl_ops; + pctl->desc.pmxops = &bcm6368_pmx_ops; + + pctl->desc.npins = ARRAY_SIZE(bcm6368_pins); + pctl->desc.pins = bcm6368_pins; + + platform_set_drvdata(pdev, pctl); + + pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl, + pctl->gpio, BCM6368_NGPIO); + if (IS_ERR(pctl->pctldev)) + return PTR_ERR(pctl->pctldev); + + return 0; +} + +static const struct of_device_id bcm6368_pinctrl_match[] = { + { .compatible = "brcm,bcm6368-pinctrl", }, + { }, +}; + +static struct platform_driver bcm6368_pinctrl_driver = { + .probe = bcm6368_pinctrl_probe, + .driver = { + .name = "bcm6368-pinctrl", + .of_match_table = bcm6368_pinctrl_match, + }, +}; + +builtin_platform_driver(bcm6368_pinctrl_driver);