[U-Boot] [PATCH] gpio: atmel: Add the PIO4 driver support
Wenyou Yang
wenyou.yang at atmel.com
Tue Sep 8 08:33:29 CEST 2015
The PIO4 is introduced from SAMA5D2, as a new version
for Atmel PIO controller.
Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
---
arch/arm/mach-at91/include/mach/atmel_pio4.h | 48 +++++
drivers/gpio/Kconfig | 11 +
drivers/gpio/Makefile | 1 +
drivers/gpio/atmel_pio4.c | 278 ++++++++++++++++++++++++++
4 files changed, 338 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..5748da6
--- /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 at 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);
+void atmel_pio4_set_pio_output(u32 port, u32 pin, u32 value);
+u32 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..21095ce
--- /dev/null
+++ b/drivers/gpio/atmel_pio4.c
@@ -0,0 +1,278 @@
+/*
+ * Atmel PIO4 device driver
+ *
+ * Copyright (C) 2015 Atmel Corporation
+ * Wenyou.Yang <wenyou.yang at 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 (0x07 << 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 (0x01 << 8)
+#define ATMEL_PIO4_CFGR_PUEN (0x01 << 9)
+#define ATMEL_PIO4_CFGR_PDEN (0x01 << 10)
+#define ATMEL_PIO4_CFGR_IFEN (0x01 << 12)
+#define ATMEL_PIO4_CFGR_IFSCEN (0x01 << 13)
+#define ATMEL_PIO4_CFGR_OPD (0x01 << 14)
+#define ATMEL_PIO4_CFGR_SCHMITT (0x01 << 15)
+#define ATMEL_PIO4_CFGR_DRVSTR (0x03 << 16)
+#define ATMEL_PIO4_CFGR_DRVSTR_HIGH (0x00 << 16)
+#define ATMEL_PIO4_CFGR_DRVSTR_MEDIUM (0x01 << 16)
+#define ATMEL_PIO4_CFGR_DRVSTR_LOW (0x02 << 16)
+#define ATMEL_PIO4_CFGR_EVTSEL (0x07 << 24)
+#define ATMEL_PIO4_CFGR_EVTSEL_FALLING (0x00 << 24)
+#define ATMEL_PIO4_CFGR_EVTSEL_RISING (0x01 << 24)
+#define ATMEL_PIO4_CFGR_EVTSEL_BOTH (0x02 << 24)
+#define ATMEL_PIO4_CFGR_EVTSEL_LOW (0x03 << 24)
+#define ATMEL_PIO4_CFGR_EVTSEL_HIGH (0x04 << 24)
+#define ATMEL_PIO4_CFGR_PCFS (0x01 << 29)
+#define ATMEL_PIO4_CFGR_ICFS (0x01 << 30)
+#define ATMEL_PIO4_CFGR_TAMPEN (0x01 << 31)
+
+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!\n");
+ 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 -1;
+
+ port_base = atmel_pio4_port_base(port);
+ 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);
+}
+
+void atmel_pio4_set_pio_output(u32 port, u32 pin, u32 value)
+{
+ struct atmel_pio4_port *port_base;
+ u32 reg, mask;
+
+ port_base = atmel_pio4_port_base(port);
+ 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);
+}
+
+u32 atmel_pio4_get_pio_input(u32 port, u32 pin)
+{
+ struct atmel_pio4_port *port_base;
+ u32 reg, mask;
+
+ port_base = atmel_pio4_port_base(port);
+ 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
--
1.7.9.5
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