* Copyright (C) 2011
* Stefano Babic, DENX Software Engineering, <sbabic@denx.de>
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <errno.h>
+#include <dm.h>
+#include <malloc.h>
#include <asm/arch/imx-regs.h>
#include <asm/gpio.h>
#include <asm/io.h>
-#include <errno.h>
enum mxc_gpio_direction {
MXC_GPIO_DIRECTION_IN,
MXC_GPIO_DIRECTION_OUT,
};
+#define GPIO_PER_BANK 32
+
+struct mxc_gpio_plat {
+ int bank_index;
+ struct gpio_regs *regs;
+};
+
+struct mxc_bank_info {
+ struct gpio_regs *regs;
+};
+
+#ifndef CONFIG_DM_GPIO
+#define GPIO_TO_PORT(n) ((n) / 32)
/* GPIO port description */
static unsigned long gpio_ports[] = {
[0] = GPIO1_BASE_ADDR,
[1] = GPIO2_BASE_ADDR,
[2] = GPIO3_BASE_ADDR,
-#if defined(CONFIG_MX51) || defined(CONFIG_MX53)
+#if defined(CONFIG_SOC_MX25) || defined(CONFIG_SOC_MX27) || defined(CONFIG_SOC_MX51) || \
+ defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
[3] = GPIO4_BASE_ADDR,
#endif
-#if defined(CONFIG_MX53)
+#if defined(CONFIG_SOC_MX27) || defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
[4] = GPIO5_BASE_ADDR,
+#ifndef CONFIG_SOX_MX6UL
[5] = GPIO6_BASE_ADDR,
+#endif
+#endif
+#if defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+#if !(defined(CONFIG_SOC_MX6UL) || defined(CONFIG_SOC_MX6ULL))
[6] = GPIO7_BASE_ADDR,
#endif
+#endif
};
static int mxc_gpio_direction(unsigned int gpio,
enum mxc_gpio_direction direction)
{
- unsigned int port = gpio >> 5;
+ unsigned int port = GPIO_TO_PORT(gpio);
struct gpio_regs *regs;
u32 l;
- if (port >= ARRAY_SIZE(gpio_ports))
- return -EINVAL;
+ if (port >= ARRAY_SIZE(gpio_ports)) {
+ printf("%s: Invalid GPIO %d\n", __func__, gpio);
+ return -1;
+ }
gpio &= 0x1f;
return 0;
}
-void gpio_set_value(int gpio, int value)
+int gpio_set_value(unsigned gpio, int value)
{
- unsigned int port = gpio >> 5;
+ unsigned int port = GPIO_TO_PORT(gpio);
struct gpio_regs *regs;
u32 l;
- if (port >= ARRAY_SIZE(gpio_ports))
- return;
+ if (port >= ARRAY_SIZE(gpio_ports)) {
+ printf("%s: Invalid GPIO %d\n", __func__, gpio);
+ return -1;
+ }
gpio &= 0x1f;
else
l &= ~(1 << gpio);
writel(l, ®s->gpio_dr);
+
+ return 0;
}
-int gpio_get_value(int gpio)
+int gpio_get_value(unsigned gpio)
{
- unsigned int port = gpio >> 5;
+ unsigned int port = GPIO_TO_PORT(gpio);
struct gpio_regs *regs;
- u32 l;
+ u32 val;
- if (port >= ARRAY_SIZE(gpio_ports))
- return -EINVAL;
+ if (port >= ARRAY_SIZE(gpio_ports)) {
+ printf("%s: Invalid GPIO %d\n", __func__, gpio);
+ return -1;
+ }
gpio &= 0x1f;
regs = (struct gpio_regs *)gpio_ports[port];
- l = (readl(®s->gpio_dr) >> gpio) & 0x01;
+ if (readl(®s->gpio_dir) & (1 << gpio)) {
+ printf("WARNING: Reading status of output GPIO_%d_%d\n",
+ port - GPIO_TO_PORT(0), gpio);
+ val = (readl(®s->gpio_dr) >> gpio) & 0x01;
+ } else {
+ val = (readl(®s->gpio_psr) >> gpio) & 0x01;
+ }
+ return val;
+}
- return l;
+int gpio_request(unsigned gpio, const char *label)
+{
+ unsigned int port = GPIO_TO_PORT(gpio);
+ if (port >= ARRAY_SIZE(gpio_ports)) {
+ printf("%s: Invalid GPIO %d\n", __func__, gpio);
+ return -1;
+ }
+ return 0;
}
-int gpio_request(int gp, const char *label)
+int gpio_free(unsigned gpio)
{
- unsigned int port = gp >> 5;
- if (port >= ARRAY_SIZE(gpio_ports))
- return -EINVAL;
+ unsigned int port = GPIO_TO_PORT(gpio);
+ if (port >= ARRAY_SIZE(gpio_ports)) {
+ printf("%s: Invalid GPIO %d\n", __func__, gpio);
+ return -1;
+ }
return 0;
}
-void gpio_free(int gp)
+int gpio_direction_input(unsigned gpio)
{
+ return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_IN);
}
-void gpio_toggle_value(int gp)
+int gpio_direction_output(unsigned gpio, int value)
{
- gpio_set_value(gp, !gpio_get_value(gp));
+ int ret = gpio_set_value(gpio, value);
+
+ if (ret < 0)
+ return ret;
+
+ return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_OUT);
}
+#endif
-int gpio_direction_input(int gp)
+#ifdef CONFIG_DM_GPIO
+#include <fdtdec.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+static int mxc_gpio_is_output(struct gpio_regs *regs, int offset)
{
- return mxc_gpio_direction(gp, MXC_GPIO_DIRECTION_IN);
+ u32 val;
+
+ val = readl(®s->gpio_dir);
+
+ return val & (1 << offset) ? 1 : 0;
}
-int gpio_direction_output(int gp, int value)
+static void mxc_gpio_bank_direction(struct gpio_regs *regs, int offset,
+ enum mxc_gpio_direction direction)
{
- int ret = mxc_gpio_direction(gp, MXC_GPIO_DIRECTION_OUT);
+ u32 l;
- if (ret < 0)
- return ret;
+ l = readl(®s->gpio_dir);
+
+ switch (direction) {
+ case MXC_GPIO_DIRECTION_OUT:
+ l |= 1 << offset;
+ break;
+ case MXC_GPIO_DIRECTION_IN:
+ l &= ~(1 << offset);
+ }
+ writel(l, ®s->gpio_dir);
+}
+
+static void mxc_gpio_bank_set_value(struct gpio_regs *regs, int offset,
+ int value)
+{
+ u32 l;
+
+ l = readl(®s->gpio_dr);
+ if (value)
+ l |= 1 << offset;
+ else
+ l &= ~(1 << offset);
+ writel(l, ®s->gpio_dr);
+}
+
+static int mxc_gpio_bank_get_value(struct gpio_regs *regs, int offset)
+{
+ return (readl(®s->gpio_psr) >> offset) & 0x01;
+}
+
+/* set GPIO pin 'gpio' as an input */
+static int mxc_gpio_direction_input(struct udevice *dev, unsigned offset)
+{
+ struct mxc_bank_info *bank = dev_get_priv(dev);
+
+ /* Configure GPIO direction as input. */
+ mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_IN);
+
+ return 0;
+}
+
+/* set GPIO pin 'gpio' as an output, with polarity 'value' */
+static int mxc_gpio_direction_output(struct udevice *dev, unsigned offset,
+ int value)
+{
+ struct mxc_bank_info *bank = dev_get_priv(dev);
+
+ /* Configure GPIO output value. */
+ mxc_gpio_bank_set_value(bank->regs, offset, value);
+
+ /* Configure GPIO direction as output. */
+ mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_OUT);
+
+ return 0;
+}
+
+/* read GPIO IN value of pin 'gpio' */
+static int mxc_gpio_get_value(struct udevice *dev, unsigned offset)
+{
+ struct mxc_bank_info *bank = dev_get_priv(dev);
+
+ return mxc_gpio_bank_get_value(bank->regs, offset);
+}
+
+/* write GPIO OUT value to pin 'gpio' */
+static int mxc_gpio_set_value(struct udevice *dev, unsigned offset,
+ int value)
+{
+ struct mxc_bank_info *bank = dev_get_priv(dev);
+
+ mxc_gpio_bank_set_value(bank->regs, offset, value);
+
+ return 0;
+}
+
+static int mxc_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+ struct mxc_bank_info *bank = dev_get_priv(dev);
+
+ /* GPIOF_FUNC is not implemented yet */
+ if (mxc_gpio_is_output(bank->regs, offset))
+ return GPIOF_OUTPUT;
+ else
+ return GPIOF_INPUT;
+}
+
+static const struct dm_gpio_ops gpio_mxc_ops = {
+ .direction_input = mxc_gpio_direction_input,
+ .direction_output = mxc_gpio_direction_output,
+ .get_value = mxc_gpio_get_value,
+ .set_value = mxc_gpio_set_value,
+ .get_function = mxc_gpio_get_function,
+};
+
+static int mxc_gpio_probe(struct udevice *dev)
+{
+ struct mxc_bank_info *bank = dev_get_priv(dev);
+ struct mxc_gpio_plat *plat = dev_get_platdata(dev);
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ int banknum;
+ char name[18], *str;
+
+ banknum = plat->bank_index;
+ sprintf(name, "GPIO%d_", banknum + 1);
+ str = strdup(name);
+ if (!str)
+ return -ENOMEM;
+ uc_priv->bank_name = str;
+ uc_priv->gpio_count = GPIO_PER_BANK;
+ bank->regs = plat->regs;
- gpio_set_value(gp, value);
return 0;
}
+
+static int mxc_gpio_bind(struct udevice *dev)
+{
+ struct mxc_gpio_plat *plat = dev->platdata;
+ fdt_addr_t addr;
+
+ /*
+ * If platdata already exsits, directly return.
+ * Actually only when DT is not supported, platdata
+ * is statically initialized in U_BOOT_DEVICES.Here
+ * will return.
+ */
+ if (plat)
+ return 0;
+
+ addr = dev_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -ENODEV;
+
+ /*
+ * TODO:
+ * When every board is converted to driver model and DT is supported,
+ * this can be done by auto-alloc feature, but not using calloc
+ * to alloc memory for platdata.
+ */
+ plat = calloc(1, sizeof(*plat));
+ if (!plat)
+ return -ENOMEM;
+
+ plat->regs = (struct gpio_regs *)addr;
+ plat->bank_index = dev->req_seq;
+ dev->platdata = plat;
+
+ return 0;
+}
+
+static const struct udevice_id mxc_gpio_ids[] = {
+ { .compatible = "fsl,imx35-gpio" },
+ { }
+};
+
+U_BOOT_DRIVER(gpio_mxc) = {
+ .name = "gpio_mxc",
+ .id = UCLASS_GPIO,
+ .ops = &gpio_mxc_ops,
+ .probe = mxc_gpio_probe,
+ .priv_auto_alloc_size = sizeof(struct mxc_bank_info),
+ .of_match = mxc_gpio_ids,
+ .bind = mxc_gpio_bind,
+};
+
+#if !CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct mxc_gpio_plat mxc_plat[] = {
+ { 0, (struct gpio_regs *)GPIO1_BASE_ADDR },
+ { 1, (struct gpio_regs *)GPIO2_BASE_ADDR },
+ { 2, (struct gpio_regs *)GPIO3_BASE_ADDR },
+#if defined(CONFIG_SOC_MX25) || defined(CONFIG_SOC_MX27) || defined(CONFIG_SOC_MX51) || \
+ defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+ { 3, (struct gpio_regs *)GPIO4_BASE_ADDR },
+#endif
+#if defined(CONFIG_SOC_MX27) || defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+ { 4, (struct gpio_regs *)GPIO5_BASE_ADDR },
+ { 5, (struct gpio_regs *)GPIO6_BASE_ADDR },
+#endif
+#if defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+ { 6, (struct gpio_regs *)GPIO7_BASE_ADDR },
+#endif
+};
+
+U_BOOT_DEVICES(mxc_gpios) = {
+ { "gpio_mxc", &mxc_plat[0] },
+ { "gpio_mxc", &mxc_plat[1] },
+ { "gpio_mxc", &mxc_plat[2] },
+#if defined(CONFIG_SOC_MX25) || defined(CONFIG_SOC_MX27) || defined(CONFIG_SOC_MX51) || \
+ defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+ { "gpio_mxc", &mxc_plat[3] },
+#endif
+#if defined(CONFIG_SOC_MX27) || defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+ { "gpio_mxc", &mxc_plat[4] },
+ { "gpio_mxc", &mxc_plat[5] },
+#endif
+#if defined(CONFIG_SOC_MX53) || defined(CONFIG_ARCH_MX6)
+ { "gpio_mxc", &mxc_plat[6] },
+#endif
+};
+#endif
+#endif
projects / karo-tx-uboot.git / blobdiff