1e30a70c2SMarek Vasut /* 2e30a70c2SMarek Vasut * (C) Copyright 2015 Marek Vasut <marex@denx.de> 3e30a70c2SMarek Vasut * 4e30a70c2SMarek Vasut * DesignWare APB GPIO driver 5e30a70c2SMarek Vasut * 6e30a70c2SMarek Vasut * SPDX-License-Identifier: GPL-2.0+ 7e30a70c2SMarek Vasut */ 8e30a70c2SMarek Vasut 9e30a70c2SMarek Vasut #include <common.h> 10e30a70c2SMarek Vasut #include <malloc.h> 11e30a70c2SMarek Vasut #include <asm/arch/gpio.h> 12e30a70c2SMarek Vasut #include <asm/gpio.h> 13e30a70c2SMarek Vasut #include <asm/io.h> 14e30a70c2SMarek Vasut #include <dm.h> 15e30a70c2SMarek Vasut #include <dm/device-internal.h> 16e30a70c2SMarek Vasut #include <dm/lists.h> 17e30a70c2SMarek Vasut #include <dm/root.h> 18e30a70c2SMarek Vasut #include <errno.h> 19e30a70c2SMarek Vasut 20e30a70c2SMarek Vasut DECLARE_GLOBAL_DATA_PTR; 21e30a70c2SMarek Vasut 22*2d0c2c47SPhil Edworthy #define GPIO_SWPORT_DR(p) (0x00 + (p) * 0xc) 23*2d0c2c47SPhil Edworthy #define GPIO_SWPORT_DDR(p) (0x04 + (p) * 0xc) 24e30a70c2SMarek Vasut #define GPIO_INTEN 0x30 25e30a70c2SMarek Vasut #define GPIO_INTMASK 0x34 26e30a70c2SMarek Vasut #define GPIO_INTTYPE_LEVEL 0x38 27e30a70c2SMarek Vasut #define GPIO_INT_POLARITY 0x3c 28e30a70c2SMarek Vasut #define GPIO_INTSTATUS 0x40 29e30a70c2SMarek Vasut #define GPIO_PORTA_DEBOUNCE 0x48 30e30a70c2SMarek Vasut #define GPIO_PORTA_EOI 0x4c 31*2d0c2c47SPhil Edworthy #define GPIO_EXT_PORT(p) (0x50 + (p) * 4) 32e30a70c2SMarek Vasut 33e30a70c2SMarek Vasut struct gpio_dwapb_platdata { 34e30a70c2SMarek Vasut const char *name; 35e30a70c2SMarek Vasut int bank; 36e30a70c2SMarek Vasut int pins; 37e30a70c2SMarek Vasut fdt_addr_t base; 38e30a70c2SMarek Vasut }; 39e30a70c2SMarek Vasut 40e30a70c2SMarek Vasut static int dwapb_gpio_direction_input(struct udevice *dev, unsigned pin) 41e30a70c2SMarek Vasut { 42e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 43e30a70c2SMarek Vasut 44*2d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin); 45e30a70c2SMarek Vasut return 0; 46e30a70c2SMarek Vasut } 47e30a70c2SMarek Vasut 48e30a70c2SMarek Vasut static int dwapb_gpio_direction_output(struct udevice *dev, unsigned pin, 49e30a70c2SMarek Vasut int val) 50e30a70c2SMarek Vasut { 51e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 52e30a70c2SMarek Vasut 53*2d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin); 54e30a70c2SMarek Vasut 55e30a70c2SMarek Vasut if (val) 56*2d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 57e30a70c2SMarek Vasut else 58*2d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 59e30a70c2SMarek Vasut 60e30a70c2SMarek Vasut return 0; 61e30a70c2SMarek Vasut } 62e30a70c2SMarek Vasut 63e30a70c2SMarek Vasut static int dwapb_gpio_get_value(struct udevice *dev, unsigned pin) 64e30a70c2SMarek Vasut { 65e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 66*2d0c2c47SPhil Edworthy return !!(readl(plat->base + GPIO_EXT_PORT(plat->bank)) & (1 << pin)); 67e30a70c2SMarek Vasut } 68e30a70c2SMarek Vasut 69e30a70c2SMarek Vasut 70e30a70c2SMarek Vasut static int dwapb_gpio_set_value(struct udevice *dev, unsigned pin, int val) 71e30a70c2SMarek Vasut { 72e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 73e30a70c2SMarek Vasut 74e30a70c2SMarek Vasut if (val) 75*2d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 76e30a70c2SMarek Vasut else 77*2d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 78e30a70c2SMarek Vasut 79e30a70c2SMarek Vasut return 0; 80e30a70c2SMarek Vasut } 81e30a70c2SMarek Vasut 82e30a70c2SMarek Vasut static const struct dm_gpio_ops gpio_dwapb_ops = { 83e30a70c2SMarek Vasut .direction_input = dwapb_gpio_direction_input, 84e30a70c2SMarek Vasut .direction_output = dwapb_gpio_direction_output, 85e30a70c2SMarek Vasut .get_value = dwapb_gpio_get_value, 86e30a70c2SMarek Vasut .set_value = dwapb_gpio_set_value, 87e30a70c2SMarek Vasut }; 88e30a70c2SMarek Vasut 89e30a70c2SMarek Vasut static int gpio_dwapb_probe(struct udevice *dev) 90e30a70c2SMarek Vasut { 91e30a70c2SMarek Vasut struct gpio_dev_priv *priv = dev_get_uclass_priv(dev); 92e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev->platdata; 93e30a70c2SMarek Vasut 94e30a70c2SMarek Vasut if (!plat) 95e30a70c2SMarek Vasut return 0; 96e30a70c2SMarek Vasut 97e30a70c2SMarek Vasut priv->gpio_count = plat->pins; 98e30a70c2SMarek Vasut priv->bank_name = plat->name; 99e30a70c2SMarek Vasut 100e30a70c2SMarek Vasut return 0; 101e30a70c2SMarek Vasut } 102e30a70c2SMarek Vasut 103e30a70c2SMarek Vasut static int gpio_dwapb_bind(struct udevice *dev) 104e30a70c2SMarek Vasut { 105e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 106e30a70c2SMarek Vasut const void *blob = gd->fdt_blob; 107e30a70c2SMarek Vasut struct udevice *subdev; 108e30a70c2SMarek Vasut fdt_addr_t base; 109e30a70c2SMarek Vasut int ret, node, bank = 0; 110e30a70c2SMarek Vasut 111e30a70c2SMarek Vasut /* If this is a child device, there is nothing to do here */ 112e30a70c2SMarek Vasut if (plat) 113e30a70c2SMarek Vasut return 0; 114e30a70c2SMarek Vasut 115e30a70c2SMarek Vasut base = fdtdec_get_addr(blob, dev->of_offset, "reg"); 116e30a70c2SMarek Vasut if (base == FDT_ADDR_T_NONE) { 117e30a70c2SMarek Vasut debug("Can't get the GPIO register base address\n"); 118e30a70c2SMarek Vasut return -ENXIO; 119e30a70c2SMarek Vasut } 120e30a70c2SMarek Vasut 121e30a70c2SMarek Vasut for (node = fdt_first_subnode(blob, dev->of_offset); 122e30a70c2SMarek Vasut node > 0; 123e30a70c2SMarek Vasut node = fdt_next_subnode(blob, node)) { 124e30a70c2SMarek Vasut if (!fdtdec_get_bool(blob, node, "gpio-controller")) 125e30a70c2SMarek Vasut continue; 126e30a70c2SMarek Vasut 127e30a70c2SMarek Vasut plat = NULL; 128e30a70c2SMarek Vasut plat = calloc(1, sizeof(*plat)); 129e30a70c2SMarek Vasut if (!plat) 130e30a70c2SMarek Vasut return -ENOMEM; 131e30a70c2SMarek Vasut 132e30a70c2SMarek Vasut plat->base = base; 133e30a70c2SMarek Vasut plat->bank = bank; 134e30a70c2SMarek Vasut plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0); 135b02e4044SSimon Glass plat->name = fdt_stringlist_get(blob, node, "bank-name", 0, 136b02e4044SSimon Glass NULL); 137e30a70c2SMarek Vasut if (ret) 138e30a70c2SMarek Vasut goto err; 139e30a70c2SMarek Vasut 140e30a70c2SMarek Vasut ret = device_bind(dev, dev->driver, plat->name, 141e30a70c2SMarek Vasut plat, -1, &subdev); 142e30a70c2SMarek Vasut if (ret) 143e30a70c2SMarek Vasut goto err; 144e30a70c2SMarek Vasut 145e30a70c2SMarek Vasut subdev->of_offset = node; 146e30a70c2SMarek Vasut bank++; 147e30a70c2SMarek Vasut } 148e30a70c2SMarek Vasut 149e30a70c2SMarek Vasut return 0; 150e30a70c2SMarek Vasut 151e30a70c2SMarek Vasut err: 152e30a70c2SMarek Vasut free(plat); 153e30a70c2SMarek Vasut return ret; 154e30a70c2SMarek Vasut } 155e30a70c2SMarek Vasut 156e30a70c2SMarek Vasut static const struct udevice_id gpio_dwapb_ids[] = { 157e30a70c2SMarek Vasut { .compatible = "snps,dw-apb-gpio" }, 158e30a70c2SMarek Vasut { } 159e30a70c2SMarek Vasut }; 160e30a70c2SMarek Vasut 161e30a70c2SMarek Vasut U_BOOT_DRIVER(gpio_dwapb) = { 162e30a70c2SMarek Vasut .name = "gpio-dwapb", 163e30a70c2SMarek Vasut .id = UCLASS_GPIO, 164e30a70c2SMarek Vasut .of_match = gpio_dwapb_ids, 165e30a70c2SMarek Vasut .ops = &gpio_dwapb_ops, 166e30a70c2SMarek Vasut .bind = gpio_dwapb_bind, 167e30a70c2SMarek Vasut .probe = gpio_dwapb_probe, 168e30a70c2SMarek Vasut }; 169