183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 2e30a70c2SMarek Vasut /* 3e30a70c2SMarek Vasut * (C) Copyright 2015 Marek Vasut <marex@denx.de> 4e30a70c2SMarek Vasut * 5e30a70c2SMarek Vasut * DesignWare APB GPIO driver 6e30a70c2SMarek Vasut */ 7e30a70c2SMarek Vasut 8e30a70c2SMarek Vasut #include <common.h> 9e30a70c2SMarek Vasut #include <malloc.h> 10e30a70c2SMarek Vasut #include <asm/arch/gpio.h> 11e30a70c2SMarek Vasut #include <asm/gpio.h> 12e30a70c2SMarek Vasut #include <asm/io.h> 13e30a70c2SMarek Vasut #include <dm.h> 14e30a70c2SMarek Vasut #include <dm/device-internal.h> 15e30a70c2SMarek Vasut #include <dm/lists.h> 16e30a70c2SMarek Vasut #include <dm/root.h> 17e30a70c2SMarek Vasut #include <errno.h> 18e30a70c2SMarek Vasut 19e30a70c2SMarek Vasut DECLARE_GLOBAL_DATA_PTR; 20e30a70c2SMarek Vasut 212d0c2c47SPhil Edworthy #define GPIO_SWPORT_DR(p) (0x00 + (p) * 0xc) 222d0c2c47SPhil Edworthy #define GPIO_SWPORT_DDR(p) (0x04 + (p) * 0xc) 23e30a70c2SMarek Vasut #define GPIO_INTEN 0x30 24e30a70c2SMarek Vasut #define GPIO_INTMASK 0x34 25e30a70c2SMarek Vasut #define GPIO_INTTYPE_LEVEL 0x38 26e30a70c2SMarek Vasut #define GPIO_INT_POLARITY 0x3c 27e30a70c2SMarek Vasut #define GPIO_INTSTATUS 0x40 28e30a70c2SMarek Vasut #define GPIO_PORTA_DEBOUNCE 0x48 29e30a70c2SMarek Vasut #define GPIO_PORTA_EOI 0x4c 302d0c2c47SPhil Edworthy #define GPIO_EXT_PORT(p) (0x50 + (p) * 4) 31e30a70c2SMarek Vasut 32e30a70c2SMarek Vasut struct gpio_dwapb_platdata { 33e30a70c2SMarek Vasut const char *name; 34e30a70c2SMarek Vasut int bank; 35e30a70c2SMarek Vasut int pins; 36e30a70c2SMarek Vasut fdt_addr_t base; 37e30a70c2SMarek Vasut }; 38e30a70c2SMarek Vasut 39e30a70c2SMarek Vasut static int dwapb_gpio_direction_input(struct udevice *dev, unsigned pin) 40e30a70c2SMarek Vasut { 41e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 42e30a70c2SMarek Vasut 432d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin); 44e30a70c2SMarek Vasut return 0; 45e30a70c2SMarek Vasut } 46e30a70c2SMarek Vasut 47e30a70c2SMarek Vasut static int dwapb_gpio_direction_output(struct udevice *dev, unsigned pin, 48e30a70c2SMarek Vasut int val) 49e30a70c2SMarek Vasut { 50e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 51e30a70c2SMarek Vasut 522d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin); 53e30a70c2SMarek Vasut 54e30a70c2SMarek Vasut if (val) 552d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 56e30a70c2SMarek Vasut else 572d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 58e30a70c2SMarek Vasut 59e30a70c2SMarek Vasut return 0; 60e30a70c2SMarek Vasut } 61e30a70c2SMarek Vasut 62e30a70c2SMarek Vasut static int dwapb_gpio_get_value(struct udevice *dev, unsigned pin) 63e30a70c2SMarek Vasut { 64e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 652d0c2c47SPhil Edworthy return !!(readl(plat->base + GPIO_EXT_PORT(plat->bank)) & (1 << pin)); 66e30a70c2SMarek Vasut } 67e30a70c2SMarek Vasut 68e30a70c2SMarek Vasut 69e30a70c2SMarek Vasut static int dwapb_gpio_set_value(struct udevice *dev, unsigned pin, int val) 70e30a70c2SMarek Vasut { 71e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 72e30a70c2SMarek Vasut 73e30a70c2SMarek Vasut if (val) 742d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 75e30a70c2SMarek Vasut else 762d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 77e30a70c2SMarek Vasut 78e30a70c2SMarek Vasut return 0; 79e30a70c2SMarek Vasut } 80e30a70c2SMarek Vasut 81*71f2700bSLey Foon Tan static int dwapb_gpio_get_function(struct udevice *dev, unsigned offset) 82*71f2700bSLey Foon Tan { 83*71f2700bSLey Foon Tan struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 84*71f2700bSLey Foon Tan u32 gpio; 85*71f2700bSLey Foon Tan 86*71f2700bSLey Foon Tan gpio = readl(plat->base + GPIO_SWPORT_DDR(plat->bank)); 87*71f2700bSLey Foon Tan 88*71f2700bSLey Foon Tan if (gpio & BIT(offset)) 89*71f2700bSLey Foon Tan return GPIOF_OUTPUT; 90*71f2700bSLey Foon Tan else 91*71f2700bSLey Foon Tan return GPIOF_INPUT; 92*71f2700bSLey Foon Tan } 93*71f2700bSLey Foon Tan 94e30a70c2SMarek Vasut static const struct dm_gpio_ops gpio_dwapb_ops = { 95e30a70c2SMarek Vasut .direction_input = dwapb_gpio_direction_input, 96e30a70c2SMarek Vasut .direction_output = dwapb_gpio_direction_output, 97e30a70c2SMarek Vasut .get_value = dwapb_gpio_get_value, 98e30a70c2SMarek Vasut .set_value = dwapb_gpio_set_value, 99*71f2700bSLey Foon Tan .get_function = dwapb_gpio_get_function, 100e30a70c2SMarek Vasut }; 101e30a70c2SMarek Vasut 102e30a70c2SMarek Vasut static int gpio_dwapb_probe(struct udevice *dev) 103e30a70c2SMarek Vasut { 104e30a70c2SMarek Vasut struct gpio_dev_priv *priv = dev_get_uclass_priv(dev); 105e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev->platdata; 106e30a70c2SMarek Vasut 107e30a70c2SMarek Vasut if (!plat) 108e30a70c2SMarek Vasut return 0; 109e30a70c2SMarek Vasut 110e30a70c2SMarek Vasut priv->gpio_count = plat->pins; 111e30a70c2SMarek Vasut priv->bank_name = plat->name; 112e30a70c2SMarek Vasut 113e30a70c2SMarek Vasut return 0; 114e30a70c2SMarek Vasut } 115e30a70c2SMarek Vasut 116e30a70c2SMarek Vasut static int gpio_dwapb_bind(struct udevice *dev) 117e30a70c2SMarek Vasut { 118e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 119e30a70c2SMarek Vasut const void *blob = gd->fdt_blob; 120e30a70c2SMarek Vasut struct udevice *subdev; 121e30a70c2SMarek Vasut fdt_addr_t base; 122e30a70c2SMarek Vasut int ret, node, bank = 0; 123e30a70c2SMarek Vasut 124e30a70c2SMarek Vasut /* If this is a child device, there is nothing to do here */ 125e30a70c2SMarek Vasut if (plat) 126e30a70c2SMarek Vasut return 0; 127e30a70c2SMarek Vasut 128e160f7d4SSimon Glass base = fdtdec_get_addr(blob, dev_of_offset(dev), "reg"); 129e30a70c2SMarek Vasut if (base == FDT_ADDR_T_NONE) { 130e30a70c2SMarek Vasut debug("Can't get the GPIO register base address\n"); 131e30a70c2SMarek Vasut return -ENXIO; 132e30a70c2SMarek Vasut } 133e30a70c2SMarek Vasut 134e160f7d4SSimon Glass for (node = fdt_first_subnode(blob, dev_of_offset(dev)); 135e30a70c2SMarek Vasut node > 0; 136e30a70c2SMarek Vasut node = fdt_next_subnode(blob, node)) { 137e30a70c2SMarek Vasut if (!fdtdec_get_bool(blob, node, "gpio-controller")) 138e30a70c2SMarek Vasut continue; 139e30a70c2SMarek Vasut 140e30a70c2SMarek Vasut plat = NULL; 141e30a70c2SMarek Vasut plat = calloc(1, sizeof(*plat)); 142e30a70c2SMarek Vasut if (!plat) 143e30a70c2SMarek Vasut return -ENOMEM; 144e30a70c2SMarek Vasut 145e30a70c2SMarek Vasut plat->base = base; 146e30a70c2SMarek Vasut plat->bank = bank; 147e30a70c2SMarek Vasut plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0); 148b02e4044SSimon Glass plat->name = fdt_stringlist_get(blob, node, "bank-name", 0, 149b02e4044SSimon Glass NULL); 150e30a70c2SMarek Vasut if (ret) 151e30a70c2SMarek Vasut goto err; 152e30a70c2SMarek Vasut 153e30a70c2SMarek Vasut ret = device_bind(dev, dev->driver, plat->name, 154e30a70c2SMarek Vasut plat, -1, &subdev); 155e30a70c2SMarek Vasut if (ret) 156e30a70c2SMarek Vasut goto err; 157e30a70c2SMarek Vasut 158e160f7d4SSimon Glass dev_set_of_offset(subdev, node); 159e30a70c2SMarek Vasut bank++; 160e30a70c2SMarek Vasut } 161e30a70c2SMarek Vasut 162e30a70c2SMarek Vasut return 0; 163e30a70c2SMarek Vasut 164e30a70c2SMarek Vasut err: 165e30a70c2SMarek Vasut free(plat); 166e30a70c2SMarek Vasut return ret; 167e30a70c2SMarek Vasut } 168e30a70c2SMarek Vasut 169e30a70c2SMarek Vasut static const struct udevice_id gpio_dwapb_ids[] = { 170e30a70c2SMarek Vasut { .compatible = "snps,dw-apb-gpio" }, 171e30a70c2SMarek Vasut { } 172e30a70c2SMarek Vasut }; 173e30a70c2SMarek Vasut 174e30a70c2SMarek Vasut U_BOOT_DRIVER(gpio_dwapb) = { 175e30a70c2SMarek Vasut .name = "gpio-dwapb", 176e30a70c2SMarek Vasut .id = UCLASS_GPIO, 177e30a70c2SMarek Vasut .of_match = gpio_dwapb_ids, 178e30a70c2SMarek Vasut .ops = &gpio_dwapb_ops, 179e30a70c2SMarek Vasut .bind = gpio_dwapb_bind, 180e30a70c2SMarek Vasut .probe = gpio_dwapb_probe, 181e30a70c2SMarek Vasut }; 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