+// SPDX-License-Identifier: GPL-2.0+
/*
* 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 <clk.h>
#include <dm.h>
+#include <fdtdec.h>
+#include <malloc.h>
#include <asm/arch/hardware.h>
+#include <asm/gpio.h>
+#include <linux/bitops.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)
+DECLARE_GLOBAL_DATA_PTR;
static struct atmel_pio4_port *atmel_pio4_port_base(u32 port)
{
}
static int atmel_pio4_config_io_func(u32 port, u32 pin,
- u32 func, u32 use_pullup)
+ u32 func, u32 config)
{
struct atmel_pio4_port *port_base;
u32 reg, mask;
- if (pin >= ATMEL_PIO4_PINS_PER_BANK)
- return -ENODEV;
+ if (pin >= ATMEL_PIO_NPINS_PER_BANK)
+ return -EINVAL;
port_base = atmel_pio4_port_base(port);
if (!port_base)
- return -ENODEV;
+ return -EINVAL;
mask = 1 << pin;
reg = func;
- reg |= use_pullup ? ATMEL_PIO4_CFGR_PUEN : 0;
+ reg |= config;
writel(mask, &port_base->mskr);
writel(reg, &port_base->cfgr);
return 0;
}
-int atmel_pio4_set_gpio(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_gpio(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_GPIO,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_GPIO,
+ config);
}
-int atmel_pio4_set_a_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_a_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_A,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_A,
+ config);
}
-int atmel_pio4_set_b_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_b_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_B,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_B,
+ config);
}
-int atmel_pio4_set_c_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_c_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_C,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_C,
+ config);
}
-int atmel_pio4_set_d_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_d_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_D,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_D,
+ config);
}
-int atmel_pio4_set_e_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_e_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_E,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_E,
+ config);
}
-int atmel_pio4_set_f_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_f_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_F,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_F,
+ config);
}
-int atmel_pio4_set_g_periph(u32 port, u32 pin, u32 use_pullup)
+int atmel_pio4_set_g_periph(u32 port, u32 pin, u32 config)
{
return atmel_pio4_config_io_func(port, pin,
- ATMEL_PIO4_CFGR_FUNC_PERIPH_G,
- use_pullup);
+ ATMEL_PIO_CFGR_FUNC_PERIPH_G,
+ config);
}
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;
+ if (pin >= ATMEL_PIO_NPINS_PER_BANK)
+ return -EINVAL;
port_base = atmel_pio4_port_base(port);
if (!port_base)
- return -ENODEV;
+ return -EINVAL;
mask = 0x01 << pin;
- reg = ATMEL_PIO4_CFGR_FUNC_GPIO | ATMEL_PIO4_CFGR_DIR;
+ reg = ATMEL_PIO_CFGR_FUNC_GPIO | ATMEL_PIO_DIR_MASK;
writel(mask, &port_base->mskr);
writel(reg, &port_base->cfgr);
struct atmel_pio4_port *port_base;
u32 reg, mask;
- if (pin >= ATMEL_PIO4_PINS_PER_BANK)
- return -ENODEV;
+ if (pin >= ATMEL_PIO_NPINS_PER_BANK)
+ return -EINVAL;
port_base = atmel_pio4_port_base(port);
if (!port_base)
- return -ENODEV;
+ return -EINVAL;
mask = 0x01 << pin;
- reg = ATMEL_PIO4_CFGR_FUNC_GPIO;
+ reg = ATMEL_PIO_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
+#if CONFIG_IS_ENABLED(DM_GPIO)
+
+struct atmel_pioctrl_data {
+ u32 nbanks;
+};
+
+struct atmel_pio4_platdata {
+ struct atmel_pio4_port *reg_base;
+};
+
+static struct atmel_pio4_port *atmel_pio4_bank_base(struct udevice *dev,
+ u32 bank)
+{
+ struct atmel_pio4_platdata *plat = dev_get_platdata(dev);
+ struct atmel_pio4_port *port_base =
+ (struct atmel_pio4_port *)((u32)plat->reg_base +
+ ATMEL_PIO_BANK_OFFSET * bank);
+
+ return port_base;
+}
+
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;
+ u32 bank = ATMEL_PIO_BANK(offset);
+ u32 line = ATMEL_PIO_LINE(offset);
+ struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
+ u32 mask = BIT(line);
writel(mask, &port_base->mskr);
- writel(reg, &port_base->cfgr);
+
+ clrbits_le32(&port_base->cfgr,
+ ATMEL_PIO_CFGR_FUNC_MASK | ATMEL_PIO_DIR_MASK);
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;
+ u32 bank = ATMEL_PIO_BANK(offset);
+ u32 line = ATMEL_PIO_LINE(offset);
+ struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
+ u32 mask = BIT(line);
writel(mask, &port_base->mskr);
- writel(reg, &port_base->cfgr);
+
+ clrsetbits_le32(&port_base->cfgr,
+ ATMEL_PIO_CFGR_FUNC_MASK, ATMEL_PIO_DIR_MASK);
if (value)
writel(mask, &port_base->sodr);
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;
+ u32 bank = ATMEL_PIO_BANK(offset);
+ u32 line = ATMEL_PIO_LINE(offset);
+ struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
+ u32 mask = BIT(line);
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;
+ u32 bank = ATMEL_PIO_BANK(offset);
+ u32 line = ATMEL_PIO_LINE(offset);
+ struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
+ u32 mask = BIT(line);
if (value)
writel(mask, &port_base->sodr);
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;
+ u32 bank = ATMEL_PIO_BANK(offset);
+ u32 line = ATMEL_PIO_LINE(offset);
+ struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
+ u32 mask = BIT(line);
writel(mask, &port_base->mskr);
return (readl(&port_base->cfgr) &
- ATMEL_PIO4_CFGR_DIR) ? GPIOF_OUTPUT : GPIOF_INPUT;
+ ATMEL_PIO_DIR_MASK) ? GPIOF_OUTPUT : GPIOF_INPUT;
}
static const struct dm_gpio_ops atmel_pio4_ops = {
.get_function = atmel_pio4_get_function,
};
+static int atmel_pio4_bind(struct udevice *dev)
+{
+ return dm_scan_fdt_dev(dev);
+}
+
static int atmel_pio4_probe(struct udevice *dev)
{
- struct at91_port_platdata *plat = dev_get_platdata(dev);
+ struct atmel_pio4_platdata *plat = dev_get_platdata(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct atmel_pioctrl_data *pioctrl_data;
+ struct clk clk;
+ fdt_addr_t addr_base;
+ u32 nbanks;
+ int ret;
+
+ ret = clk_get_by_index(dev, 0, &clk);
+ if (ret)
+ return ret;
+
+ ret = clk_enable(&clk);
+ if (ret)
+ return ret;
+
+ clk_free(&clk);
+
+ addr_base = devfdt_get_addr(dev);
+ if (addr_base == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->reg_base = (struct atmel_pio4_port *)addr_base;
- uc_priv->bank_name = plat->bank_name;
- uc_priv->gpio_count = ATMEL_PIO4_PINS_PER_BANK;
+ pioctrl_data = (struct atmel_pioctrl_data *)dev_get_driver_data(dev);
+ nbanks = pioctrl_data->nbanks;
+
+ uc_priv->bank_name = fdt_get_name(gd->fdt_blob, dev_of_offset(dev),
+ NULL);
+ uc_priv->gpio_count = nbanks * ATMEL_PIO_NPINS_PER_BANK;
return 0;
}
+/*
+ * The number of banks can be different from a SoC to another one.
+ * We can have up to 16 banks.
+ */
+static const struct atmel_pioctrl_data atmel_sama5d2_pioctrl_data = {
+ .nbanks = 4,
+};
+
+static const struct udevice_id atmel_pio4_ids[] = {
+ {
+ .compatible = "atmel,sama5d2-gpio",
+ .data = (ulong)&atmel_sama5d2_pioctrl_data,
+ },
+ {}
+};
+
U_BOOT_DRIVER(gpio_atmel_pio4) = {
.name = "gpio_atmel_pio4",
.id = UCLASS_GPIO,
.ops = &atmel_pio4_ops,
.probe = atmel_pio4_probe,
+ .bind = atmel_pio4_bind,
+ .of_match = atmel_pio4_ids,
+ .platdata_auto_alloc_size = sizeof(struct atmel_pio4_platdata),
};
+
#endif
projects / oweals / u-boot.git / blobdiff