diff options
Diffstat (limited to 'drivers/gpio/gpio-ingenic.c')
| -rw-r--r-- | drivers/gpio/gpio-ingenic.c | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/drivers/gpio/gpio-ingenic.c b/drivers/gpio/gpio-ingenic.c deleted file mode 100644 index e738e384a5ca..000000000000 --- a/drivers/gpio/gpio-ingenic.c +++ /dev/null @@ -1,392 +0,0 @@ -/* - * Ingenic JZ47xx GPIO driver - * - * Copyright (c) 2017 Paul Cercueil <paul@crapouillou.net> - * - * License terms: GNU General Public License (GPL) version 2 - */ - -#include <linux/gpio/driver.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/of_address.h> -#include <linux/of_device.h> -#include <linux/of_irq.h> -#include <linux/pinctrl/consumer.h> -#include <linux/regmap.h> - -#define GPIO_PIN 0x00 -#define GPIO_MSK 0x20 - -#define JZ4740_GPIO_DATA 0x10 -#define JZ4740_GPIO_SELECT 0x50 -#define JZ4740_GPIO_DIR 0x60 -#define JZ4740_GPIO_TRIG 0x70 -#define JZ4740_GPIO_FLAG 0x80 - -#define JZ4770_GPIO_INT 0x10 -#define JZ4770_GPIO_PAT1 0x30 -#define JZ4770_GPIO_PAT0 0x40 -#define JZ4770_GPIO_FLAG 0x50 - -#define REG_SET(x) ((x) + 0x4) -#define REG_CLEAR(x) ((x) + 0x8) - -enum jz_version { - ID_JZ4740, - ID_JZ4770, - ID_JZ4780, -}; - -struct ingenic_gpio_chip { - struct regmap *map; - struct gpio_chip gc; - struct irq_chip irq_chip; - unsigned int irq, reg_base; - enum jz_version version; -}; - -static u32 gpio_ingenic_read_reg(struct ingenic_gpio_chip *jzgc, u8 reg) -{ - unsigned int val; - - regmap_read(jzgc->map, jzgc->reg_base + reg, &val); - - return (u32) val; -} - -static void gpio_ingenic_set_bit(struct ingenic_gpio_chip *jzgc, - u8 reg, u8 offset, bool set) -{ - if (set) - reg = REG_SET(reg); - else - reg = REG_CLEAR(reg); - - regmap_write(jzgc->map, jzgc->reg_base + reg, BIT(offset)); -} - -static inline bool gpio_get_value(struct ingenic_gpio_chip *jzgc, u8 offset) -{ - unsigned int val = gpio_ingenic_read_reg(jzgc, GPIO_PIN); - - return !!(val & BIT(offset)); -} - -static void gpio_set_value(struct ingenic_gpio_chip *jzgc, u8 offset, int value) -{ - if (jzgc->version >= ID_JZ4770) - gpio_ingenic_set_bit(jzgc, JZ4770_GPIO_PAT0, offset, !!value); - else - gpio_ingenic_set_bit(jzgc, JZ4740_GPIO_DATA, offset, !!value); -} - -static void irq_set_type(struct ingenic_gpio_chip *jzgc, - u8 offset, unsigned int type) -{ - u8 reg1, reg2; - - if (jzgc->version >= ID_JZ4770) { - reg1 = JZ4770_GPIO_PAT1; - reg2 = JZ4770_GPIO_PAT0; - } else { - reg1 = JZ4740_GPIO_TRIG; - reg2 = JZ4740_GPIO_DIR; - } - - switch (type) { - case IRQ_TYPE_EDGE_RISING: - gpio_ingenic_set_bit(jzgc, reg2, offset, true); - gpio_ingenic_set_bit(jzgc, reg1, offset, true); - break; - case IRQ_TYPE_EDGE_FALLING: - gpio_ingenic_set_bit(jzgc, reg2, offset, false); - gpio_ingenic_set_bit(jzgc, reg1, offset, true); - break; - case IRQ_TYPE_LEVEL_HIGH: - gpio_ingenic_set_bit(jzgc, reg2, offset, true); - gpio_ingenic_set_bit(jzgc, reg1, offset, false); - break; - case IRQ_TYPE_LEVEL_LOW: - default: - gpio_ingenic_set_bit(jzgc, reg2, offset, false); - gpio_ingenic_set_bit(jzgc, reg1, offset, false); - break; - } -} - -static void ingenic_gpio_irq_mask(struct irq_data *irqd) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - - gpio_ingenic_set_bit(jzgc, GPIO_MSK, irqd->hwirq, true); -} - -static void ingenic_gpio_irq_unmask(struct irq_data *irqd) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - - gpio_ingenic_set_bit(jzgc, GPIO_MSK, irqd->hwirq, false); -} - -static void ingenic_gpio_irq_enable(struct irq_data *irqd) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - int irq = irqd->hwirq; - - if (jzgc->version >= ID_JZ4770) - gpio_ingenic_set_bit(jzgc, JZ4770_GPIO_INT, irq, true); - else - gpio_ingenic_set_bit(jzgc, JZ4740_GPIO_SELECT, irq, true); - - ingenic_gpio_irq_unmask(irqd); -} - -static void ingenic_gpio_irq_disable(struct irq_data *irqd) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - int irq = irqd->hwirq; - - ingenic_gpio_irq_mask(irqd); - - if (jzgc->version >= ID_JZ4770) - gpio_ingenic_set_bit(jzgc, JZ4770_GPIO_INT, irq, false); - else - gpio_ingenic_set_bit(jzgc, JZ4740_GPIO_SELECT, irq, false); -} - -static void ingenic_gpio_irq_ack(struct irq_data *irqd) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - int irq = irqd->hwirq; - bool high; - - if (irqd_get_trigger_type(irqd) == IRQ_TYPE_EDGE_BOTH) { - /* - * Switch to an interrupt for the opposite edge to the one that - * triggered the interrupt being ACKed. - */ - high = gpio_get_value(jzgc, irq); - if (high) - irq_set_type(jzgc, irq, IRQ_TYPE_EDGE_FALLING); - else - irq_set_type(jzgc, irq, IRQ_TYPE_EDGE_RISING); - } - - if (jzgc->version >= ID_JZ4770) - gpio_ingenic_set_bit(jzgc, JZ4770_GPIO_FLAG, irq, false); - else - gpio_ingenic_set_bit(jzgc, JZ4740_GPIO_DATA, irq, true); -} - -static int ingenic_gpio_irq_set_type(struct irq_data *irqd, unsigned int type) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - - switch (type) { - case IRQ_TYPE_EDGE_BOTH: - case IRQ_TYPE_EDGE_RISING: - case IRQ_TYPE_EDGE_FALLING: - irq_set_handler_locked(irqd, handle_edge_irq); - break; - case IRQ_TYPE_LEVEL_HIGH: - case IRQ_TYPE_LEVEL_LOW: - irq_set_handler_locked(irqd, handle_level_irq); - break; - default: - irq_set_handler_locked(irqd, handle_bad_irq); - } - - if (type == IRQ_TYPE_EDGE_BOTH) { - /* - * The hardware does not support interrupts on both edges. The - * best we can do is to set up a single-edge interrupt and then - * switch to the opposing edge when ACKing the interrupt. - */ - bool high = gpio_get_value(jzgc, irqd->hwirq); - - type = high ? IRQ_TYPE_EDGE_FALLING : IRQ_TYPE_EDGE_RISING; - } - - irq_set_type(jzgc, irqd->hwirq, type); - return 0; -} - -static int ingenic_gpio_irq_set_wake(struct irq_data *irqd, unsigned int on) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - - return irq_set_irq_wake(jzgc->irq, on); -} - -static void ingenic_gpio_irq_handler(struct irq_desc *desc) -{ - struct gpio_chip *gc = irq_desc_get_handler_data(desc); - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - struct irq_chip *irq_chip = irq_data_get_irq_chip(&desc->irq_data); - unsigned long flag, i; - - chained_irq_enter(irq_chip, desc); - - if (jzgc->version >= ID_JZ4770) - flag = gpio_ingenic_read_reg(jzgc, JZ4770_GPIO_FLAG); - else - flag = gpio_ingenic_read_reg(jzgc, JZ4740_GPIO_FLAG); - - for_each_set_bit(i, &flag, 32) - generic_handle_irq(irq_linear_revmap(gc->irq.domain, i)); - chained_irq_exit(irq_chip, desc); -} - -static void ingenic_gpio_set(struct gpio_chip *gc, - unsigned int offset, int value) -{ - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - - gpio_set_value(jzgc, offset, value); -} - -static int ingenic_gpio_get(struct gpio_chip *gc, unsigned int offset) -{ - struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); - - return (int) gpio_get_value(jzgc, offset); -} - -static int ingenic_gpio_direction_input(struct gpio_chip *gc, - unsigned int offset) -{ - return pinctrl_gpio_direction_input(gc->base + offset); -} - -static int ingenic_gpio_direction_output(struct gpio_chip *gc, - unsigned int offset, int value) -{ - ingenic_gpio_set(gc, offset, value); - return pinctrl_gpio_direction_output(gc->base + offset); -} - -static const struct of_device_id ingenic_gpio_of_match[] = { - { .compatible = "ingenic,jz4740-gpio", .data = (void *)ID_JZ4740 }, - { .compatible = "ingenic,jz4770-gpio", .data = (void *)ID_JZ4770 }, - { .compatible = "ingenic,jz4780-gpio", .data = (void *)ID_JZ4780 }, - {}, -}; -MODULE_DEVICE_TABLE(of, ingenic_gpio_of_match); - -static int ingenic_gpio_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct ingenic_gpio_chip *jzgc; - u32 bank; - int err; - - jzgc = devm_kzalloc(dev, sizeof(*jzgc), GFP_KERNEL); - if (!jzgc) - return -ENOMEM; - - jzgc->map = dev_get_drvdata(dev->parent); - if (!jzgc->map) { - dev_err(dev, "Cannot get parent regmap\n"); - return -ENXIO; - } - - err = of_property_read_u32(dev->of_node, "reg", &bank); - if (err) { - dev_err(dev, "Cannot read \"reg\" property: %i\n", err); - return err; - } - - jzgc->reg_base = bank * 0x100; - - jzgc->gc.label = devm_kasprintf(dev, GFP_KERNEL, "GPIO%c", 'A' + bank); - if (!jzgc->gc.label) - return -ENOMEM; - - /* DO NOT EXPAND THIS: FOR BACKWARD GPIO NUMBERSPACE COMPATIBIBILITY - * ONLY: WORK TO TRANSITION CONSUMERS TO USE THE GPIO DESCRIPTOR API IN - * <linux/gpio/consumer.h> INSTEAD. - */ - jzgc->gc.base = bank * 32; - - jzgc->gc.ngpio = 32; - jzgc->gc.parent = dev; - jzgc->gc.of_node = dev->of_node; - jzgc->gc.owner = THIS_MODULE; - jzgc->version = (enum jz_version)of_device_get_match_data(dev); - - jzgc->gc.set = ingenic_gpio_set; - jzgc->gc.get = ingenic_gpio_get; - jzgc->gc.direction_input = ingenic_gpio_direction_input; - jzgc->gc.direction_output = ingenic_gpio_direction_output; - - if (of_property_read_bool(dev->of_node, "gpio-ranges")) { - jzgc->gc.request = gpiochip_generic_request; - jzgc->gc.free = gpiochip_generic_free; - } - - err = devm_gpiochip_add_data(dev, &jzgc->gc, jzgc); - if (err) - return err; - - jzgc->irq = irq_of_parse_and_map(dev->of_node, 0); - if (!jzgc->irq) - return -EINVAL; - - jzgc->irq_chip.name = jzgc->gc.label; - jzgc->irq_chip.irq_enable = ingenic_gpio_irq_enable; - jzgc->irq_chip.irq_disable = ingenic_gpio_irq_disable; - jzgc->irq_chip.irq_unmask = ingenic_gpio_irq_unmask; - jzgc->irq_chip.irq_mask = ingenic_gpio_irq_mask; - jzgc->irq_chip.irq_ack = ingenic_gpio_irq_ack; - jzgc->irq_chip.irq_set_type = ingenic_gpio_irq_set_type; - jzgc->irq_chip.irq_set_wake = ingenic_gpio_irq_set_wake; - jzgc->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND; - - err = gpiochip_irqchip_add(&jzgc->gc, &jzgc->irq_chip, 0, - handle_level_irq, IRQ_TYPE_NONE); - if (err) - return err; - - gpiochip_set_chained_irqchip(&jzgc->gc, &jzgc->irq_chip, - jzgc->irq, ingenic_gpio_irq_handler); - return 0; -} - -static int ingenic_gpio_remove(struct platform_device *pdev) -{ - return 0; -} - -static struct platform_driver ingenic_gpio_driver = { - .driver = { - .name = "gpio-ingenic", - .of_match_table = of_match_ptr(ingenic_gpio_of_match), - }, - .probe = ingenic_gpio_probe, - .remove = ingenic_gpio_remove, -}; - -static int __init ingenic_gpio_drv_register(void) -{ - return platform_driver_register(&ingenic_gpio_driver); -} -subsys_initcall(ingenic_gpio_drv_register); - -static void __exit ingenic_gpio_drv_unregister(void) -{ - platform_driver_unregister(&ingenic_gpio_driver); -} -module_exit(ingenic_gpio_drv_unregister); - -MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>"); -MODULE_DESCRIPTION("Ingenic JZ47xx GPIO driver"); -MODULE_LICENSE("GPL"); |