+// SPDX-License-Identifier: GPL-2.0+
/*
- * Memory Setup stuff - taken from blob memsetup.S
+ * Copyright (C) 2013 Bo Shen <voice.shen@atmel.com>
*
* Copyright (C) 2009 Jens Scharsig (js_at_ng@scharsoft.de)
*
* Copyright (C) 2005 HP Labs
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * WARNING:
- *
- * As the code is right now, it expects all PIO ports A,B,C,...
- * to be evenly spaced in the memory map:
- * ATMEL_BASE_PIOA + port * sizeof at91pio_t
- * This might not necessaryly be true in future Atmel SoCs.
- * This code should be fixed to use a pointer array to the ports.
*/
#include <config.h>
#include <common.h>
+#include <clk.h>
+#include <dm.h>
#include <asm/io.h>
-#include <asm/sizes.h>
+#include <linux/sizes.h>
+#include <asm/gpio.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_pio.h>
+#define GPIO_PER_BANK 32
+
+static struct at91_port *at91_pio_get_port(unsigned port)
+{
+ switch (port) {
+ case AT91_PIO_PORTA:
+ return (struct at91_port *)ATMEL_BASE_PIOA;
+ case AT91_PIO_PORTB:
+ return (struct at91_port *)ATMEL_BASE_PIOB;
+ case AT91_PIO_PORTC:
+ return (struct at91_port *)ATMEL_BASE_PIOC;
+#if (ATMEL_PIO_PORTS > 3)
+ case AT91_PIO_PORTD:
+ return (struct at91_port *)ATMEL_BASE_PIOD;
+#if (ATMEL_PIO_PORTS > 4)
+ case AT91_PIO_PORTE:
+ return (struct at91_port *)ATMEL_BASE_PIOE;
+#endif
+#endif
+ default:
+ printf("Error: at91_gpio: Fail to get PIO base!\n");
+ return NULL;
+ }
+}
+
+static void at91_set_port_pullup(struct at91_port *at91_port, unsigned offset,
+ int use_pullup)
+{
+ u32 mask;
+
+ mask = 1 << offset;
+ if (use_pullup)
+ writel(mask, &at91_port->puer);
+ else
+ writel(mask, &at91_port->pudr);
+ writel(mask, &at91_port->per);
+}
+
int at91_set_pio_pullup(unsigned port, unsigned pin, int use_pullup)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+
+ if (at91_port && (pin < GPIO_PER_BANK))
+ at91_set_port_pullup(at91_port, pin, use_pullup);
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
- mask = 1 << pin;
- if (use_pullup)
- writel(1 << pin, &pio->port[port].puer);
- else
- writel(1 << pin, &pio->port[port].pudr);
- writel(mask, &pio->port[port].per);
- }
return 0;
}
*/
int at91_set_pio_periph(unsigned port, unsigned pin, int use_pullup)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
+ if (at91_port && (pin < GPIO_PER_BANK)) {
mask = 1 << pin;
- writel(mask, &pio->port[port].idr);
+ writel(mask, &at91_port->idr);
at91_set_pio_pullup(port, pin, use_pullup);
- writel(mask, &pio->port[port].per);
+ writel(mask, &at91_port->per);
}
+
return 0;
}
*/
int at91_set_a_periph(unsigned port, unsigned pin, int use_pullup)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
+ if (at91_port && (pin < GPIO_PER_BANK)) {
mask = 1 << pin;
- writel(mask, &pio->port[port].idr);
+ writel(mask, &at91_port->idr);
at91_set_pio_pullup(port, pin, use_pullup);
- writel(mask, &pio->port[port].asr);
- writel(mask, &pio->port[port].pdr);
+ writel(mask, &at91_port->mux.pio2.asr);
+ writel(mask, &at91_port->pdr);
}
+
return 0;
}
*/
int at91_set_b_periph(unsigned port, unsigned pin, int use_pullup)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
+ if (at91_port && (pin < GPIO_PER_BANK)) {
mask = 1 << pin;
- writel(mask, &pio->port[port].idr);
+ writel(mask, &at91_port->idr);
at91_set_pio_pullup(port, pin, use_pullup);
- writel(mask, &pio->port[port].bsr);
- writel(mask, &pio->port[port].pdr);
+ writel(mask, &at91_port->mux.pio2.bsr);
+ writel(mask, &at91_port->pdr);
}
+
return 0;
}
/*
- * mux the pin to the gpio controller (instead of "A" or "B" peripheral), and
- * configure it for an input.
+ * mux the pin to the "A" internal peripheral role.
*/
-int at91_set_pio_input(unsigned port, u32 pin, int use_pullup)
+int at91_pio3_set_a_periph(unsigned port, unsigned pin, int use_pullup)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
+ if (at91_port && (pin < GPIO_PER_BANK)) {
mask = 1 << pin;
- writel(mask, &pio->port[port].idr);
+ writel(mask, &at91_port->idr);
at91_set_pio_pullup(port, pin, use_pullup);
- writel(mask, &pio->port[port].odr);
- writel(mask, &pio->port[port].per);
+ writel(readl(&at91_port->mux.pio3.abcdsr1) & ~mask,
+ &at91_port->mux.pio3.abcdsr1);
+ writel(readl(&at91_port->mux.pio3.abcdsr2) & ~mask,
+ &at91_port->mux.pio3.abcdsr2);
+
+ writel(mask, &at91_port->pdr);
}
+
+ return 0;
+}
+
+/*
+ * mux the pin to the "B" internal peripheral role.
+ */
+int at91_pio3_set_b_periph(unsigned port, unsigned pin, int use_pullup)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ writel(mask, &at91_port->idr);
+ at91_set_pio_pullup(port, pin, use_pullup);
+ writel(readl(&at91_port->mux.pio3.abcdsr1) | mask,
+ &at91_port->mux.pio3.abcdsr1);
+ writel(readl(&at91_port->mux.pio3.abcdsr2) & ~mask,
+ &at91_port->mux.pio3.abcdsr2);
+
+ writel(mask, &at91_port->pdr);
+ }
+
+ return 0;
+}
+/*
+ * mux the pin to the "C" internal peripheral role.
+ */
+int at91_pio3_set_c_periph(unsigned port, unsigned pin, int use_pullup)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ writel(mask, &at91_port->idr);
+ at91_set_pio_pullup(port, pin, use_pullup);
+ writel(readl(&at91_port->mux.pio3.abcdsr1) & ~mask,
+ &at91_port->mux.pio3.abcdsr1);
+ writel(readl(&at91_port->mux.pio3.abcdsr2) | mask,
+ &at91_port->mux.pio3.abcdsr2);
+ writel(mask, &at91_port->pdr);
+ }
+
return 0;
}
+/*
+ * mux the pin to the "D" internal peripheral role.
+ */
+int at91_pio3_set_d_periph(unsigned port, unsigned pin, int use_pullup)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ writel(mask, &at91_port->idr);
+ at91_set_pio_pullup(port, pin, use_pullup);
+ writel(readl(&at91_port->mux.pio3.abcdsr1) | mask,
+ &at91_port->mux.pio3.abcdsr1);
+ writel(readl(&at91_port->mux.pio3.abcdsr2) | mask,
+ &at91_port->mux.pio3.abcdsr2);
+ writel(mask, &at91_port->pdr);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_DM_GPIO
+static bool at91_get_port_output(struct at91_port *at91_port, int offset)
+{
+ u32 mask, val;
+
+ mask = 1 << offset;
+ val = readl(&at91_port->osr);
+ return val & mask;
+}
+#endif
+
+static void at91_set_port_input(struct at91_port *at91_port, int offset,
+ int use_pullup)
+{
+ u32 mask;
+
+ mask = 1 << offset;
+ writel(mask, &at91_port->idr);
+ at91_set_port_pullup(at91_port, offset, use_pullup);
+ writel(mask, &at91_port->odr);
+ writel(mask, &at91_port->per);
+}
+
+/*
+ * mux the pin to the gpio controller (instead of "A" or "B" peripheral), and
+ * configure it for an input.
+ */
+int at91_set_pio_input(unsigned port, u32 pin, int use_pullup)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+
+ if (at91_port && (pin < GPIO_PER_BANK))
+ at91_set_port_input(at91_port, pin, use_pullup);
+
+ return 0;
+}
+
+static void at91_set_port_output(struct at91_port *at91_port, int offset,
+ int value)
+{
+ u32 mask;
+
+ mask = 1 << offset;
+ writel(mask, &at91_port->idr);
+ writel(mask, &at91_port->pudr);
+ if (value)
+ writel(mask, &at91_port->sodr);
+ else
+ writel(mask, &at91_port->codr);
+ writel(mask, &at91_port->oer);
+ writel(mask, &at91_port->per);
+}
+
/*
* mux the pin to the gpio controller (instead of "A" or "B" peripheral),
* and configure it for an output.
*/
int at91_set_pio_output(unsigned port, u32 pin, int value)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+
+ if (at91_port && (pin < GPIO_PER_BANK))
+ at91_set_port_output(at91_port, pin, value);
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
- mask = 1 << pin;
- writel(mask, &pio->port[port].idr);
- writel(mask, &pio->port[port].pudr);
- if (value)
- writel(mask, &pio->port[port].sodr);
- else
- writel(mask, &pio->port[port].codr);
- writel(mask, &pio->port[port].oer);
- writel(mask, &pio->port[port].per);
- }
return 0;
}
*/
int at91_set_pio_deglitch(unsigned port, unsigned pin, int is_on)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
+ if (at91_port && (pin < GPIO_PER_BANK)) {
mask = 1 << pin;
if (is_on)
- writel(mask, &pio->port[port].ifer);
+ writel(mask, &at91_port->ifer);
else
- writel(mask, &pio->port[port].ifdr);
+ writel(mask, &at91_port->ifdr);
+ }
+
+ return 0;
+}
+
+/*
+ * enable/disable the glitch filter. mostly used with IRQ handling.
+ */
+int at91_pio3_set_pio_deglitch(unsigned port, unsigned pin, int is_on)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ if (is_on) {
+ writel(mask, &at91_port->mux.pio3.ifscdr);
+ writel(mask, &at91_port->ifer);
+ } else {
+ writel(mask, &at91_port->ifdr);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * enable/disable the debounce filter.
+ */
+int at91_pio3_set_pio_debounce(unsigned port, unsigned pin, int is_on, int div)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ if (is_on) {
+ writel(mask, &at91_port->mux.pio3.ifscer);
+ writel(div & PIO_SCDR_DIV, &at91_port->mux.pio3.scdr);
+ writel(mask, &at91_port->ifer);
+ } else {
+ writel(mask, &at91_port->ifdr);
+ }
}
+
+ return 0;
+}
+
+/*
+ * enable/disable the pull-down.
+ * If pull-up already enabled while calling the function, we disable it.
+ */
+int at91_pio3_set_pio_pulldown(unsigned port, unsigned pin, int is_on)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ if (is_on) {
+ at91_set_pio_pullup(port, pin, 0);
+ writel(mask, &at91_port->mux.pio3.ppder);
+ } else
+ writel(mask, &at91_port->mux.pio3.ppddr);
+ }
+
+ return 0;
+}
+
+int at91_pio3_set_pio_pullup(unsigned port, unsigned pin, int use_pullup)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+
+ if (use_pullup)
+ at91_pio3_set_pio_pulldown(port, pin, 0);
+
+ if (at91_port && (pin < GPIO_PER_BANK))
+ at91_set_port_pullup(at91_port, pin, use_pullup);
+
+ return 0;
+}
+
+/*
+ * disable Schmitt trigger
+ */
+int at91_pio3_set_pio_disable_schmitt_trig(unsigned port, unsigned pin)
+{
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
+
+ if (at91_port && (pin < GPIO_PER_BANK)) {
+ mask = 1 << pin;
+ writel(readl(&at91_port->schmitt) | mask,
+ &at91_port->schmitt);
+ }
+
return 0;
}
*/
int at91_set_pio_multi_drive(unsigned port, unsigned pin, int is_on)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+ u32 mask;
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
+ if (at91_port && (pin < GPIO_PER_BANK)) {
mask = 1 << pin;
if (is_on)
- writel(mask, &pio->port[port].mder);
+ writel(mask, &at91_port->mder);
else
- writel(mask, &pio->port[port].mddr);
+ writel(mask, &at91_port->mddr);
}
+
return 0;
}
+static void at91_set_port_value(struct at91_port *at91_port, int offset,
+ int value)
+{
+ u32 mask;
+
+ mask = 1 << offset;
+ if (value)
+ writel(mask, &at91_port->sodr);
+ else
+ writel(mask, &at91_port->codr);
+}
+
/*
* assuming the pin is muxed as a gpio output, set its value.
*/
int at91_set_pio_value(unsigned port, unsigned pin, int value)
{
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
+
+ if (at91_port && (pin < GPIO_PER_BANK))
+ at91_set_port_value(at91_port, pin, value);
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
- mask = 1 << pin;
- if (value)
- writel(mask, &pio->port[port].sodr);
- else
- writel(mask, &pio->port[port].codr);
- }
return 0;
}
+static int at91_get_port_value(struct at91_port *at91_port, int offset)
+{
+ u32 pdsr = 0, mask;
+
+ mask = 1 << offset;
+ pdsr = readl(&at91_port->pdsr) & mask;
+
+ return pdsr != 0;
+}
/*
* read the pin's value (works even if it's not muxed as a gpio).
*/
int at91_get_pio_value(unsigned port, unsigned pin)
{
- u32 pdsr = 0;
- at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
- u32 mask;
+ struct at91_port *at91_port = at91_pio_get_port(port);
- if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
- mask = 1 << pin;
- pdsr = readl(&pio->port[port].pdsr) & mask;
- }
- return pdsr != 0;
+ if (at91_port && (pin < GPIO_PER_BANK))
+ return at91_get_port_value(at91_port, pin);
+
+ return 0;
+}
+
+#ifndef CONFIG_DM_GPIO
+/* Common GPIO API */
+
+int gpio_request(unsigned gpio, const char *label)
+{
+ return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+ return 0;
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+ at91_set_pio_input(at91_gpio_to_port(gpio),
+ at91_gpio_to_pin(gpio), 0);
+ return 0;
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+ at91_set_pio_output(at91_gpio_to_port(gpio),
+ at91_gpio_to_pin(gpio), value);
+ return 0;
+}
+
+int gpio_get_value(unsigned gpio)
+{
+ return at91_get_pio_value(at91_gpio_to_port(gpio),
+ at91_gpio_to_pin(gpio));
+}
+
+int gpio_set_value(unsigned gpio, int value)
+{
+ at91_set_pio_value(at91_gpio_to_port(gpio),
+ at91_gpio_to_pin(gpio), value);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_DM_GPIO
+
+struct at91_port_priv {
+ struct at91_port *regs;
+};
+
+/* set GPIO pin 'gpio' as an input */
+static int at91_gpio_direction_input(struct udevice *dev, unsigned offset)
+{
+ struct at91_port_priv *port = dev_get_priv(dev);
+
+ at91_set_port_input(port->regs, offset, 0);
+
+ return 0;
+}
+
+/* set GPIO pin 'gpio' as an output, with polarity 'value' */
+static int at91_gpio_direction_output(struct udevice *dev, unsigned offset,
+ int value)
+{
+ struct at91_port_priv *port = dev_get_priv(dev);
+
+ at91_set_port_output(port->regs, offset, value);
+
+ return 0;
+}
+
+/* read GPIO IN value of pin 'gpio' */
+static int at91_gpio_get_value(struct udevice *dev, unsigned offset)
+{
+ struct at91_port_priv *port = dev_get_priv(dev);
+
+ return at91_get_port_value(port->regs, offset);
+}
+
+/* write GPIO OUT value to pin 'gpio' */
+static int at91_gpio_set_value(struct udevice *dev, unsigned offset,
+ int value)
+{
+ struct at91_port_priv *port = dev_get_priv(dev);
+
+ at91_set_port_value(port->regs, offset, value);
+
+ return 0;
+}
+
+static int at91_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+ struct at91_port_priv *port = dev_get_priv(dev);
+
+ /* GPIOF_FUNC is not implemented yet */
+ if (at91_get_port_output(port->regs, offset))
+ return GPIOF_OUTPUT;
+ else
+ return GPIOF_INPUT;
+}
+
+static const struct dm_gpio_ops gpio_at91_ops = {
+ .direction_input = at91_gpio_direction_input,
+ .direction_output = at91_gpio_direction_output,
+ .get_value = at91_gpio_get_value,
+ .set_value = at91_gpio_set_value,
+ .get_function = at91_gpio_get_function,
+};
+
+static int at91_gpio_probe(struct udevice *dev)
+{
+ struct at91_port_priv *port = dev_get_priv(dev);
+ struct at91_port_platdata *plat = dev_get_platdata(dev);
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct clk clk;
+ 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);
+
+ uc_priv->bank_name = plat->bank_name;
+ uc_priv->gpio_count = GPIO_PER_BANK;
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ plat->base_addr = (uint32_t)devfdt_get_addr_ptr(dev);
+#endif
+ port->regs = (struct at91_port *)plat->base_addr;
+
+ return 0;
}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id at91_gpio_ids[] = {
+ { .compatible = "atmel,at91rm9200-gpio" },
+ { }
+};
+#endif
+
+U_BOOT_DRIVER(gpio_at91) = {
+ .name = "gpio_at91",
+ .id = UCLASS_GPIO,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = at91_gpio_ids,
+ .platdata_auto_alloc_size = sizeof(struct at91_port_platdata),
+#endif
+ .ops = &gpio_at91_ops,
+ .probe = at91_gpio_probe,
+ .priv_auto_alloc_size = sizeof(struct at91_port_priv),
+};
+#endif
projects / u-boot / blobdiff