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> 18db6a158bSLey Foon Tan #include <reset.h> 19e30a70c2SMarek Vasut 20e30a70c2SMarek Vasut DECLARE_GLOBAL_DATA_PTR; 21e30a70c2SMarek Vasut 222d0c2c47SPhil Edworthy #define GPIO_SWPORT_DR(p) (0x00 + (p) * 0xc) 232d0c2c47SPhil 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 312d0c2c47SPhil Edworthy #define GPIO_EXT_PORT(p) (0x50 + (p) * 4) 32e30a70c2SMarek Vasut 33db6a158bSLey Foon Tan struct gpio_dwapb_priv { 34db6a158bSLey Foon Tan struct reset_ctl_bulk resets; 35db6a158bSLey Foon Tan }; 36db6a158bSLey Foon Tan 37e30a70c2SMarek Vasut struct gpio_dwapb_platdata { 38e30a70c2SMarek Vasut const char *name; 39e30a70c2SMarek Vasut int bank; 40e30a70c2SMarek Vasut int pins; 41e30a70c2SMarek Vasut fdt_addr_t base; 42e30a70c2SMarek Vasut }; 43e30a70c2SMarek Vasut 44e30a70c2SMarek Vasut static int dwapb_gpio_direction_input(struct udevice *dev, unsigned pin) 45e30a70c2SMarek Vasut { 46e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 47e30a70c2SMarek Vasut 482d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin); 49e30a70c2SMarek Vasut return 0; 50e30a70c2SMarek Vasut } 51e30a70c2SMarek Vasut 52e30a70c2SMarek Vasut static int dwapb_gpio_direction_output(struct udevice *dev, unsigned pin, 53e30a70c2SMarek Vasut int val) 54e30a70c2SMarek Vasut { 55e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 56e30a70c2SMarek Vasut 572d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin); 58e30a70c2SMarek Vasut 59e30a70c2SMarek Vasut if (val) 602d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 61e30a70c2SMarek Vasut else 622d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 63e30a70c2SMarek Vasut 64e30a70c2SMarek Vasut return 0; 65e30a70c2SMarek Vasut } 66e30a70c2SMarek Vasut 67e30a70c2SMarek Vasut static int dwapb_gpio_get_value(struct udevice *dev, unsigned pin) 68e30a70c2SMarek Vasut { 69e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 702d0c2c47SPhil Edworthy return !!(readl(plat->base + GPIO_EXT_PORT(plat->bank)) & (1 << pin)); 71e30a70c2SMarek Vasut } 72e30a70c2SMarek Vasut 73e30a70c2SMarek Vasut 74e30a70c2SMarek Vasut static int dwapb_gpio_set_value(struct udevice *dev, unsigned pin, int val) 75e30a70c2SMarek Vasut { 76e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 77e30a70c2SMarek Vasut 78e30a70c2SMarek Vasut if (val) 792d0c2c47SPhil Edworthy setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 80e30a70c2SMarek Vasut else 812d0c2c47SPhil Edworthy clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin); 82e30a70c2SMarek Vasut 83e30a70c2SMarek Vasut return 0; 84e30a70c2SMarek Vasut } 85e30a70c2SMarek Vasut 8671f2700bSLey Foon Tan static int dwapb_gpio_get_function(struct udevice *dev, unsigned offset) 8771f2700bSLey Foon Tan { 8871f2700bSLey Foon Tan struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 8971f2700bSLey Foon Tan u32 gpio; 9071f2700bSLey Foon Tan 9171f2700bSLey Foon Tan gpio = readl(plat->base + GPIO_SWPORT_DDR(plat->bank)); 9271f2700bSLey Foon Tan 9371f2700bSLey Foon Tan if (gpio & BIT(offset)) 9471f2700bSLey Foon Tan return GPIOF_OUTPUT; 9571f2700bSLey Foon Tan else 9671f2700bSLey Foon Tan return GPIOF_INPUT; 9771f2700bSLey Foon Tan } 9871f2700bSLey Foon Tan 99e30a70c2SMarek Vasut static const struct dm_gpio_ops gpio_dwapb_ops = { 100e30a70c2SMarek Vasut .direction_input = dwapb_gpio_direction_input, 101e30a70c2SMarek Vasut .direction_output = dwapb_gpio_direction_output, 102e30a70c2SMarek Vasut .get_value = dwapb_gpio_get_value, 103e30a70c2SMarek Vasut .set_value = dwapb_gpio_set_value, 10471f2700bSLey Foon Tan .get_function = dwapb_gpio_get_function, 105e30a70c2SMarek Vasut }; 106e30a70c2SMarek Vasut 107db6a158bSLey Foon Tan static int gpio_dwapb_reset(struct udevice *dev) 108db6a158bSLey Foon Tan { 109db6a158bSLey Foon Tan int ret; 110db6a158bSLey Foon Tan struct gpio_dwapb_priv *priv = dev_get_priv(dev); 111db6a158bSLey Foon Tan 112db6a158bSLey Foon Tan ret = reset_get_bulk(dev, &priv->resets); 113db6a158bSLey Foon Tan if (ret) { 114db6a158bSLey Foon Tan /* Return 0 if error due to !CONFIG_DM_RESET and reset 115db6a158bSLey Foon Tan * DT property is not present. 116db6a158bSLey Foon Tan */ 117db6a158bSLey Foon Tan if (ret == -ENOENT || ret == -ENOTSUPP) 118db6a158bSLey Foon Tan return 0; 119db6a158bSLey Foon Tan 120db6a158bSLey Foon Tan dev_warn(dev, "Can't get reset: %d\n", ret); 121db6a158bSLey Foon Tan return ret; 122db6a158bSLey Foon Tan } 123db6a158bSLey Foon Tan 124db6a158bSLey Foon Tan ret = reset_deassert_bulk(&priv->resets); 125db6a158bSLey Foon Tan if (ret) { 126db6a158bSLey Foon Tan reset_release_bulk(&priv->resets); 127db6a158bSLey Foon Tan dev_err(dev, "Failed to reset: %d\n", ret); 128db6a158bSLey Foon Tan return ret; 129db6a158bSLey Foon Tan } 130db6a158bSLey Foon Tan 131db6a158bSLey Foon Tan return 0; 132db6a158bSLey Foon Tan } 133db6a158bSLey Foon Tan 134e30a70c2SMarek Vasut static int gpio_dwapb_probe(struct udevice *dev) 135e30a70c2SMarek Vasut { 136e30a70c2SMarek Vasut struct gpio_dev_priv *priv = dev_get_uclass_priv(dev); 137e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev->platdata; 138e30a70c2SMarek Vasut 139db6a158bSLey Foon Tan if (!plat) { 140db6a158bSLey Foon Tan /* Reset on parent device only */ 141db6a158bSLey Foon Tan return gpio_dwapb_reset(dev); 142db6a158bSLey Foon Tan } 143e30a70c2SMarek Vasut 144e30a70c2SMarek Vasut priv->gpio_count = plat->pins; 145e30a70c2SMarek Vasut priv->bank_name = plat->name; 146e30a70c2SMarek Vasut 147e30a70c2SMarek Vasut return 0; 148e30a70c2SMarek Vasut } 149e30a70c2SMarek Vasut 150e30a70c2SMarek Vasut static int gpio_dwapb_bind(struct udevice *dev) 151e30a70c2SMarek Vasut { 152e30a70c2SMarek Vasut struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 153e30a70c2SMarek Vasut const void *blob = gd->fdt_blob; 154e30a70c2SMarek Vasut struct udevice *subdev; 155e30a70c2SMarek Vasut fdt_addr_t base; 156e30a70c2SMarek Vasut int ret, node, bank = 0; 157e30a70c2SMarek Vasut 158e30a70c2SMarek Vasut /* If this is a child device, there is nothing to do here */ 159e30a70c2SMarek Vasut if (plat) 160e30a70c2SMarek Vasut return 0; 161e30a70c2SMarek Vasut 1629ea35444SLey Foon Tan base = dev_read_addr(dev); 163e30a70c2SMarek Vasut if (base == FDT_ADDR_T_NONE) { 164e30a70c2SMarek Vasut debug("Can't get the GPIO register base address\n"); 165e30a70c2SMarek Vasut return -ENXIO; 166e30a70c2SMarek Vasut } 167e30a70c2SMarek Vasut 168e160f7d4SSimon Glass for (node = fdt_first_subnode(blob, dev_of_offset(dev)); 169e30a70c2SMarek Vasut node > 0; 170e30a70c2SMarek Vasut node = fdt_next_subnode(blob, node)) { 171e30a70c2SMarek Vasut if (!fdtdec_get_bool(blob, node, "gpio-controller")) 172e30a70c2SMarek Vasut continue; 173e30a70c2SMarek Vasut 17486d56a5dSLey Foon Tan plat = devm_kcalloc(dev, 1, sizeof(*plat), GFP_KERNEL); 175e30a70c2SMarek Vasut if (!plat) 176e30a70c2SMarek Vasut return -ENOMEM; 177e30a70c2SMarek Vasut 178e30a70c2SMarek Vasut plat->base = base; 179e30a70c2SMarek Vasut plat->bank = bank; 180e30a70c2SMarek Vasut plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0); 181b02e4044SSimon Glass plat->name = fdt_stringlist_get(blob, node, "bank-name", 0, 182b02e4044SSimon Glass NULL); 183*89f1fe5bSSimon Goldschmidt if (!plat->name) { 184*89f1fe5bSSimon Goldschmidt /* 185*89f1fe5bSSimon Goldschmidt * Fall back to node name. This means accessing pins 186*89f1fe5bSSimon Goldschmidt * via bank name won't work. 187*89f1fe5bSSimon Goldschmidt */ 188*89f1fe5bSSimon Goldschmidt plat->name = fdt_get_name(blob, node, NULL); 189*89f1fe5bSSimon Goldschmidt } 190e30a70c2SMarek Vasut 191e30a70c2SMarek Vasut ret = device_bind(dev, dev->driver, plat->name, 192e30a70c2SMarek Vasut plat, -1, &subdev); 193e30a70c2SMarek Vasut if (ret) 19486d56a5dSLey Foon Tan return ret; 195e30a70c2SMarek Vasut 196e160f7d4SSimon Glass dev_set_of_offset(subdev, node); 197e30a70c2SMarek Vasut bank++; 198e30a70c2SMarek Vasut } 199e30a70c2SMarek Vasut 200e30a70c2SMarek Vasut return 0; 201e30a70c2SMarek Vasut } 202e30a70c2SMarek Vasut 203db6a158bSLey Foon Tan static int gpio_dwapb_remove(struct udevice *dev) 204db6a158bSLey Foon Tan { 205db6a158bSLey Foon Tan struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); 206db6a158bSLey Foon Tan struct gpio_dwapb_priv *priv = dev_get_priv(dev); 207db6a158bSLey Foon Tan 208db6a158bSLey Foon Tan if (!plat && priv) 209db6a158bSLey Foon Tan return reset_release_bulk(&priv->resets); 210db6a158bSLey Foon Tan 211db6a158bSLey Foon Tan return 0; 212db6a158bSLey Foon Tan } 213db6a158bSLey Foon Tan 214e30a70c2SMarek Vasut static const struct udevice_id gpio_dwapb_ids[] = { 215e30a70c2SMarek Vasut { .compatible = "snps,dw-apb-gpio" }, 216e30a70c2SMarek Vasut { } 217e30a70c2SMarek Vasut }; 218e30a70c2SMarek Vasut 219e30a70c2SMarek Vasut U_BOOT_DRIVER(gpio_dwapb) = { 220e30a70c2SMarek Vasut .name = "gpio-dwapb", 221e30a70c2SMarek Vasut .id = UCLASS_GPIO, 222e30a70c2SMarek Vasut .of_match = gpio_dwapb_ids, 223e30a70c2SMarek Vasut .ops = &gpio_dwapb_ops, 224e30a70c2SMarek Vasut .bind = gpio_dwapb_bind, 225e30a70c2SMarek Vasut .probe = gpio_dwapb_probe, 226db6a158bSLey Foon Tan .remove = gpio_dwapb_remove, 227db6a158bSLey Foon Tan .priv_auto_alloc_size = sizeof(struct gpio_dwapb_priv), 228e30a70c2SMarek Vasut }; 229