138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015
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* Bhuvanchandra DV, Toradex, Inc.
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <asm/gpio.h>
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#include <asm/mach-imx/iomux-v3.h>
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#include <asm/io.h>
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#include <malloc.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct vybrid_gpios {
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unsigned int chip;
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struct vybrid_gpio_regs *reg;
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};
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static int vybrid_gpio_direction_input(struct udevice *dev, unsigned gpio)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
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imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_IN);
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return 0;
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}
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static int vybrid_gpio_direction_output(struct udevice *dev, unsigned gpio,
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int value)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
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gpio_set_value(gpio, value);
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imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_OUT);
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return 0;
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}
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static int vybrid_gpio_get_value(struct udevice *dev, unsigned gpio)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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return ((readl(&gpios->reg->gpio_pdir) & (1 << gpio))) ? 1 : 0;
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}
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static int vybrid_gpio_set_value(struct udevice *dev, unsigned gpio,
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int value)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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if (value)
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writel((1 << gpio), &gpios->reg->gpio_psor);
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else
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writel((1 << gpio), &gpios->reg->gpio_pcor);
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return 0;
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}
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static int vybrid_gpio_get_function(struct udevice *dev, unsigned gpio)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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u32 g_state = 0;
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gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
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imx_iomux_gpio_get_function(gpio, &g_state);
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if (((g_state & (0x07 << PAD_MUX_MODE_SHIFT)) >> PAD_MUX_MODE_SHIFT) > 0)
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return GPIOF_FUNC;
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if (g_state & PAD_CTL_OBE_ENABLE)
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return GPIOF_OUTPUT;
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if (g_state & PAD_CTL_IBE_ENABLE)
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return GPIOF_INPUT;
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if (!(g_state & PAD_CTL_OBE_IBE_ENABLE))
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return GPIOF_UNUSED;
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return GPIOF_UNKNOWN;
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}
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static const struct dm_gpio_ops gpio_vybrid_ops = {
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.direction_input = vybrid_gpio_direction_input,
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.direction_output = vybrid_gpio_direction_output,
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.get_value = vybrid_gpio_get_value,
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.set_value = vybrid_gpio_set_value,
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.get_function = vybrid_gpio_get_function,
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};
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static int vybrid_gpio_probe(struct udevice *dev)
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{
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struct vybrid_gpios *gpios = dev_get_priv(dev);
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struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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uc_priv->bank_name = plat->port_name;
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uc_priv->gpio_count = VYBRID_GPIO_COUNT;
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gpios->reg = (struct vybrid_gpio_regs *)plat->base;
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gpios->chip = plat->chip;
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return 0;
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}
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static int vybrid_gpio_odata_to_platdata(struct udevice *dev)
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{
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struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
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fdt_addr_t base_addr;
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base_addr = devfdt_get_addr(dev);
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if (base_addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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plat->base = base_addr;
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plat->chip = dev->req_seq;
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plat->port_name = fdt_get_name(gd->fdt_blob, dev_of_offset(dev), NULL);
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return 0;
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}
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static const struct udevice_id vybrid_gpio_ids[] = {
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{ .compatible = "fsl,vf610-gpio" },
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{ }
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};
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U_BOOT_DRIVER(gpio_vybrid) = {
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.name = "gpio_vybrid",
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.id = UCLASS_GPIO,
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.ops = &gpio_vybrid_ops,
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.of_match = vybrid_gpio_ids,
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.ofdata_to_platdata = vybrid_gpio_odata_to_platdata,
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.probe = vybrid_gpio_probe,
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.priv_auto_alloc_size = sizeof(struct vybrid_gpios),
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.platdata_auto_alloc_size = sizeof(struct vybrid_gpio_platdata),
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};
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