[U-Boot] [PATCH v2] gpio: atmel: Add the PIO4 driver support
The PIO4 is introduced from SAMA5D2, as a new version for Atmel PIO controller.
Signed-off-by: Wenyou Yang wenyou.yang@atmel.com ---
Changes in v2: 1./ update the macro definitions according to the latest datasheet. 2./ change the return value to -ENODEV. 3./ add check to port_base, pin and return -ENODEV. 4./ change the return value for set/get_pio_output/input function.
arch/arm/mach-at91/include/mach/atmel_pio4.h | 48 +++++ drivers/gpio/Kconfig | 11 + drivers/gpio/Makefile | 1 + drivers/gpio/atmel_pio4.c | 294 ++++++++++++++++++++++++++ 4 files changed, 354 insertions(+) create mode 100644 arch/arm/mach-at91/include/mach/atmel_pio4.h create mode 100644 drivers/gpio/atmel_pio4.c
diff --git a/arch/arm/mach-at91/include/mach/atmel_pio4.h b/arch/arm/mach-at91/include/mach/atmel_pio4.h new file mode 100644 index 0000000..8bb4b12 --- /dev/null +++ b/arch/arm/mach-at91/include/mach/atmel_pio4.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2015 Atmel Corporation. + * Wenyou Yang wenyou.yang@atmel.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ATMEL_PIO4_H +#define __ATMEL_PIO4_H + +#ifndef __ASSEMBLY__ + +struct atmel_pio4_port { + u32 mskr; /* 0x00 PIO Mask Register */ + u32 cfgr; /* 0x04 PIO Configuration Register */ + u32 pdsr; /* 0x08 PIO Pin Data Status Register */ + u32 locksr; /* 0x0C PIO Lock Status Register */ + u32 sodr; /* 0x10 PIO Set Output Data Register */ + u32 codr; /* 0x14 PIO Clear Output Data Register */ + u32 odsr; /* 0x18 PIO Output Data Status Register */ + u32 reserved0; + u32 ier; /* 0x20 PIO Interrupt Enable Register */ + u32 idr; /* 0x24 PIO Interrupt Disable Register */ + u32 imr; /* 0x28 PIO Interrupt Mask Register */ + u32 isr; /* 0x2C PIO Interrupt Status Register */ + u32 reserved1[3]; + u32 iofr; /* 0x3C PIO I/O Freeze Register */ +}; + +#endif + +#define AT91_PIO_PORTA 0x0 +#define AT91_PIO_PORTB 0x1 +#define AT91_PIO_PORTC 0x2 +#define AT91_PIO_PORTD 0x3 + +int atmel_pio4_set_gpio(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_a_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_b_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_c_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_d_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_e_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_f_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_g_periph(u32 port, u32 pin, u32 use_pullup); +int atmel_pio4_set_pio_output(u32 port, u32 pin, u32 value); +int atmel_pio4_get_pio_input(u32 port, u32 pin); + +#endif diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index ef57a89..ddc47c6 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -21,6 +21,17 @@ config DWAPB_GPIO help Support for the Designware APB GPIO driver.
+config ATMEL_PIO4 + bool "ATMEL PIO4 driver" + depends on DM + default n + help + Say yes here to support the Atmel PIO4 driver. + The PIO4 is new version of Atmel PIO controller, which manages + up to 128 fully programmable input/output lines. Each I/O line + may be dedicated as a general purpose I/O or be assigned to + a function of an embedded peripheral. + config LPC32XX_GPIO bool "LPC32XX GPIO driver" depends on DM diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index c58aa4d..fb4fd25 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -12,6 +12,7 @@ endif obj-$(CONFIG_DM_GPIO) += gpio-uclass.o
obj-$(CONFIG_AT91_GPIO) += at91_gpio.o +obj-$(CONFIG_ATMEL_PIO4) += atmel_pio4.o obj-$(CONFIG_INTEL_ICH6_GPIO) += intel_ich6_gpio.o obj-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o obj-$(CONFIG_KONA_GPIO) += kona_gpio.o diff --git a/drivers/gpio/atmel_pio4.c b/drivers/gpio/atmel_pio4.c new file mode 100644 index 0000000..99affeb --- /dev/null +++ b/drivers/gpio/atmel_pio4.c @@ -0,0 +1,294 @@ +/* + * Atmel PIO4 device driver + * + * Copyright (C) 2015 Atmel Corporation + * Wenyou.Yang wenyou.yang@atmel.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <dm.h> +#include <asm/arch/hardware.h> +#include <mach/gpio.h> +#include <mach/atmel_pio4.h> + +#define ATMEL_PIO4_PINS_PER_BANK 32 + +/* + * Register Field Definitions + */ +#define ATMEL_PIO4_CFGR_FUNC (0x7 << 0) +#define ATMEL_PIO4_CFGR_FUNC_GPIO (0x0 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_A (0x1 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_B (0x2 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_C (0x3 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_D (0x4 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_E (0x5 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_F (0x6 << 0) +#define ATMEL_PIO4_CFGR_FUNC_PERIPH_G (0x7 << 0) +#define ATMEL_PIO4_CFGR_DIR (0x1 << 8) +#define ATMEL_PIO4_CFGR_PUEN (0x1 << 9) +#define ATMEL_PIO4_CFGR_PDEN (0x1 << 10) +#define ATMEL_PIO4_CFGR_IFEN (0x1 << 12) +#define ATMEL_PIO4_CFGR_IFSCEN (0x1 << 13) +#define ATMEL_PIO4_CFGR_OPD (0x1 << 14) +#define ATMEL_PIO4_CFGR_SCHMITT (0x1 << 15) +#define ATMEL_PIO4_CFGR_DRVSTR (0x3 << 16) +#define ATMEL_PIO4_CFGR_DRVSTR_LOW0 (0x0 << 16) +#define ATMEL_PIO4_CFGR_DRVSTR_LOW1 (0x1 << 16) +#define ATMEL_PIO4_CFGR_DRVSTR_MEDIUM (0x2 << 16) +#define ATMEL_PIO4_CFGR_DRVSTR_HIGH (0x3 << 16) +#define ATMEL_PIO4_CFGR_EVTSEL (0x7 << 24) +#define ATMEL_PIO4_CFGR_EVTSEL_FALLING (0x0 << 24) +#define ATMEL_PIO4_CFGR_EVTSEL_RISING (0x1 << 24) +#define ATMEL_PIO4_CFGR_EVTSEL_BOTH (0x2 << 24) +#define ATMEL_PIO4_CFGR_EVTSEL_LOW (0x3 << 24) +#define ATMEL_PIO4_CFGR_EVTSEL_HIGH (0x4 << 24) +#define ATMEL_PIO4_CFGR_PCFS (0x1 << 29) +#define ATMEL_PIO4_CFGR_ICFS (0x1 << 30) + +static struct atmel_pio4_port *atmel_pio4_port_base(u32 port) +{ + struct atmel_pio4_port *base = NULL; + + switch (port) { + case AT91_PIO_PORTA: + base = (struct atmel_pio4_port *)ATMEL_BASE_PIOA; + break; + case AT91_PIO_PORTB: + base = (struct atmel_pio4_port *)ATMEL_BASE_PIOB; + break; + case AT91_PIO_PORTC: + base = (struct atmel_pio4_port *)ATMEL_BASE_PIOC; + break; + case AT91_PIO_PORTD: + base = (struct atmel_pio4_port *)ATMEL_BASE_PIOD; + break; + default: + printf("Error: Atmel PIO4: Failed to get PIO base of port#%d!\n", + port); + break; + } + + return base; +} + +static int atmel_pio4_config_io_func(u32 port, u32 pin, + u32 func, u32 use_pullup) +{ + struct atmel_pio4_port *port_base; + u32 reg, mask; + + if (pin >= ATMEL_PIO4_PINS_PER_BANK) + return -ENODEV; + + port_base = atmel_pio4_port_base(port); + if (!port_base) + return -ENODEV; + + mask = 1 << pin; + reg = func; + reg |= use_pullup ? ATMEL_PIO4_CFGR_PUEN : 0; + + writel(mask, &port_base->mskr); + writel(reg, &port_base->cfgr); + + return 0; +} + +int atmel_pio4_set_gpio(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_GPIO, + use_pullup); +} + +int atmel_pio4_set_a_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_A, + use_pullup); +} + +int atmel_pio4_set_b_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_B, + use_pullup); +} + +int atmel_pio4_set_c_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_C, + use_pullup); +} + +int atmel_pio4_set_d_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_D, + use_pullup); +} + +int atmel_pio4_set_e_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_E, + use_pullup); +} + +int atmel_pio4_set_f_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_F, + use_pullup); +} + +int atmel_pio4_set_g_periph(u32 port, u32 pin, u32 use_pullup) +{ + return atmel_pio4_config_io_func(port, pin, + ATMEL_PIO4_CFGR_FUNC_PERIPH_G, + use_pullup); +} + +int atmel_pio4_set_pio_output(u32 port, u32 pin, u32 value) +{ + struct atmel_pio4_port *port_base; + u32 reg, mask; + + if (pin >= ATMEL_PIO4_PINS_PER_BANK) + return -ENODEV; + + port_base = atmel_pio4_port_base(port); + if (!port_base) + return -ENODEV; + + mask = 0x01 << pin; + reg = ATMEL_PIO4_CFGR_FUNC_GPIO | ATMEL_PIO4_CFGR_DIR; + + writel(mask, &port_base->mskr); + writel(reg, &port_base->cfgr); + + if (value) + writel(mask, &port_base->sodr); + else + writel(mask, &port_base->codr); +} + +int atmel_pio4_get_pio_input(u32 port, u32 pin) +{ + struct atmel_pio4_port *port_base; + u32 reg, mask; + + if (pin >= ATMEL_PIO4_PINS_PER_BANK) + return -ENODEV; + + port_base = atmel_pio4_port_base(port); + if (!port_base) + return -ENODEV; + + mask = 0x01 << pin; + reg = ATMEL_PIO4_CFGR_FUNC_GPIO; + + writel(mask, &port_base->mskr); + writel(reg, &port_base->cfgr); + + return (readl(&port_base->pdsr) & mask) ? 1 : 0; +} + +#ifdef CONFIG_DM_GPIO +static int atmel_pio4_direction_input(struct udevice *dev, unsigned offset) +{ + struct at91_port_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; + u32 mask = 0x01 << offset; + u32 reg = ATMEL_PIO4_CFGR_FUNC_GPIO; + + writel(mask, &port_base->mskr); + writel(reg, &port_base->cfgr); + + return 0; +} + +static int atmel_pio4_direction_output(struct udevice *dev, + unsigned offset, int value) +{ + struct at91_port_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; + u32 mask = 0x01 << offset; + u32 reg = ATMEL_PIO4_CFGR_FUNC_GPIO | ATMEL_PIO4_CFGR_DIR; + + writel(mask, &port_base->mskr); + writel(reg, &port_base->cfgr); + + if (value) + writel(mask, &port_base->sodr); + else + writel(mask, &port_base->codr); + + return 0; +} + +static int atmel_pio4_get_value(struct udevice *dev, unsigned offset) +{ + struct at91_port_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; + u32 mask = 0x01 << offset; + + return (readl(&port_base->pdsr) & mask) ? 1 : 0; +} + +static int atmel_pio4_set_value(struct udevice *dev, + unsigned offset, int value) +{ + struct at91_port_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; + u32 mask = 0x01 << offset; + + if (value) + writel(mask, &port_base->sodr); + else + writel(mask, &port_base->codr); + + return 0; +} + +static int atmel_pio4_get_function(struct udevice *dev, unsigned offset) +{ + struct at91_port_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; + u32 mask = 0x01 << offset; + + writel(mask, &port_base->mskr); + + return (readl(&port_base->cfgr) & + ATMEL_PIO4_CFGR_DIR) ? GPIOF_OUTPUT : GPIOF_INPUT; +} + +static const struct dm_gpio_ops atmel_pio4_ops = { + .direction_input = atmel_pio4_direction_input, + .direction_output = atmel_pio4_direction_output, + .get_value = atmel_pio4_get_value, + .set_value = atmel_pio4_set_value, + .get_function = atmel_pio4_get_function, +}; + +static int atmel_pio4_probe(struct udevice *dev) +{ + struct at91_port_platdata *plat = dev_get_platdata(dev); + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + uc_priv->bank_name = plat->bank_name; + uc_priv->gpio_count = ATMEL_PIO4_PINS_PER_BANK; + + return 0; +} + +U_BOOT_DRIVER(gpio_atmel_pio4) = { + .name = "gpio_atmel_pio4", + .id = UCLASS_GPIO, + .ops = &atmel_pio4_ops, + .probe = atmel_pio4_probe, +}; +#endif
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Wenyou Yang