// SPDX-License-Identifier: GPL-2.0+ /* * Driver for Broadcom BCM2835 GPIO unit (pinctrl + GPIO) * * Copyright (C) 2012 Chris Boot, Simon Arlott, Stephen Warren * * This driver is inspired by: * pinctrl-nomadik.c, please see original file for copyright information * pinctrl-tegra.c, please see original file for copyright information */ #include <linux/bitmap.h> #include <linux/bug.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/gpio/driver.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/irqdesc.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of_address.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/machine.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include <linux/pinctrl/pinconf-generic.h> #include <linux/platform_device.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/string_choices.h> #include <linux/types.h> #include <dt-bindings/pinctrl/bcm2835.h> #define MODULE_NAME … #define BCM2835_NUM_GPIOS … #define BCM2711_NUM_GPIOS … #define BCM2835_NUM_BANKS … #define BCM2835_NUM_IRQS … /* GPIO register offsets */ #define GPFSEL0 … #define GPSET0 … #define GPCLR0 … #define GPLEV0 … #define GPEDS0 … #define GPREN0 … #define GPFEN0 … #define GPHEN0 … #define GPLEN0 … #define GPAREN0 … #define GPAFEN0 … #define GPPUD … #define GPPUDCLK0 … #define GP_GPIO_PUP_PDN_CNTRL_REG0 … #define FSEL_REG(p) … #define FSEL_SHIFT(p) … #define GPIO_REG_OFFSET(p) … #define GPIO_REG_SHIFT(p) … #define PUD_2711_MASK … #define PUD_2711_REG_OFFSET(p) … #define PUD_2711_REG_SHIFT(p) … /* argument: bcm2835_pinconf_pull */ #define BCM2835_PINCONF_PARAM_PULL … #define BCM2711_PULL_NONE … #define BCM2711_PULL_UP … #define BCM2711_PULL_DOWN … struct bcm2835_pinctrl { … }; /* pins are just named GPIO0..GPIO53 */ #define BCM2835_GPIO_PIN(a) … static struct pinctrl_pin_desc bcm2835_gpio_pins[] = …; /* one pin per group */ static const char * const bcm2835_gpio_groups[] = …; enum bcm2835_fsel { … }; static const char * const bcm2835_functions[BCM2835_FSEL_COUNT] = …; static const char * const irq_type_names[] = …; static bool persist_gpio_outputs; module_param(persist_gpio_outputs, bool, 0444); MODULE_PARM_DESC(…) …; static inline u32 bcm2835_gpio_rd(struct bcm2835_pinctrl *pc, unsigned reg) { … } static inline void bcm2835_gpio_wr(struct bcm2835_pinctrl *pc, unsigned reg, u32 val) { … } static inline int bcm2835_gpio_get_bit(struct bcm2835_pinctrl *pc, unsigned reg, unsigned bit) { … } /* note NOT a read/modify/write cycle */ static inline void bcm2835_gpio_set_bit(struct bcm2835_pinctrl *pc, unsigned reg, unsigned bit) { … } static inline enum bcm2835_fsel bcm2835_pinctrl_fsel_get( struct bcm2835_pinctrl *pc, unsigned pin) { … } static inline void bcm2835_pinctrl_fsel_set( struct bcm2835_pinctrl *pc, unsigned pin, enum bcm2835_fsel fsel) { … } static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { … } static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset) { … } static int bcm2835_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) { … } static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { … } static int bcm2835_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { … } static int bcm2835_add_pin_ranges_fallback(struct gpio_chip *gc) { … } static const struct gpio_chip bcm2835_gpio_chip = …; static const struct gpio_chip bcm2711_gpio_chip = …; static void bcm2835_gpio_irq_handle_bank(struct bcm2835_pinctrl *pc, unsigned int bank, u32 mask) { … } static void bcm2835_gpio_irq_handler(struct irq_desc *desc) { … } static irqreturn_t bcm2835_gpio_wake_irq_handler(int irq, void *dev_id) { … } static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc, unsigned reg, unsigned offset, bool enable) { … } /* fast path for IRQ handler */ static void bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc, unsigned offset, bool enable) { … } static void bcm2835_gpio_irq_unmask(struct irq_data *data) { … } static void bcm2835_gpio_irq_mask(struct irq_data *data) { … } static int __bcm2835_gpio_irq_set_type_disabled(struct bcm2835_pinctrl *pc, unsigned offset, unsigned int type) { … } /* slower path for reconfiguring IRQ type */ static int __bcm2835_gpio_irq_set_type_enabled(struct bcm2835_pinctrl *pc, unsigned offset, unsigned int type) { … } static int bcm2835_gpio_irq_set_type(struct irq_data *data, unsigned int type) { … } static void bcm2835_gpio_irq_ack(struct irq_data *data) { … } static int bcm2835_gpio_irq_set_wake(struct irq_data *data, unsigned int on) { … } static const struct irq_chip bcm2835_gpio_irq_chip = …; static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev) { … } static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev, unsigned selector) { … } static int bcm2835_pctl_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, const unsigned **pins, unsigned *num_pins) { … } static void bcm2835_pctl_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned offset) { … } static void bcm2835_pctl_dt_free_map(struct pinctrl_dev *pctldev, struct pinctrl_map *maps, unsigned num_maps) { … } static int bcm2835_pctl_dt_node_to_map_func(struct bcm2835_pinctrl *pc, struct device_node *np, u32 pin, u32 fnum, struct pinctrl_map **maps) { … } static int bcm2835_pctl_dt_node_to_map_pull(struct bcm2835_pinctrl *pc, struct device_node *np, u32 pin, u32 pull, struct pinctrl_map **maps) { … } static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np, struct pinctrl_map **map, unsigned int *num_maps) { … } static const struct pinctrl_ops bcm2835_pctl_ops = …; static int bcm2835_pmx_free(struct pinctrl_dev *pctldev, unsigned offset) { … } static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev) { … } static const char *bcm2835_pmx_get_function_name(struct pinctrl_dev *pctldev, unsigned selector) { … } static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev, unsigned selector, const char * const **groups, unsigned * const num_groups) { … } static int bcm2835_pmx_set(struct pinctrl_dev *pctldev, unsigned func_selector, unsigned group_selector) { … } static void bcm2835_pmx_gpio_disable_free(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned offset) { … } static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned offset, bool input) { … } static const struct pinmux_ops bcm2835_pmx_ops = …; static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *config) { … } static void bcm2835_pull_config_set(struct bcm2835_pinctrl *pc, unsigned int pin, unsigned int arg) { … } static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int num_configs) { … } static const struct pinconf_ops bcm2835_pinconf_ops = …; static int bcm2711_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *config) { … } static void bcm2711_pull_config_set(struct bcm2835_pinctrl *pc, unsigned int pin, unsigned int arg) { … } static int bcm2711_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int num_configs) { … } static const struct pinconf_ops bcm2711_pinconf_ops = …; static const struct pinctrl_desc bcm2835_pinctrl_desc = …; static const struct pinctrl_desc bcm2711_pinctrl_desc = …; static const struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = …; static const struct pinctrl_gpio_range bcm2711_pinctrl_gpio_range = …; struct bcm_plat_data { … }; static const struct bcm_plat_data bcm2835_plat_data = …; static const struct bcm_plat_data bcm2711_plat_data = …; static const struct of_device_id bcm2835_pinctrl_match[] = …; MODULE_DEVICE_TABLE(of, bcm2835_pinctrl_match); static int bcm2835_pinctrl_probe(struct platform_device *pdev) { … } static struct platform_driver bcm2835_pinctrl_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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