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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | // SPDX-License-Identifier: GPL-2.0-or-later /* * (C) Copyright 2022 - Analog Devices, Inc. * * Written and/or maintained by Timesys Corporation * * Author: Greg Malysa <greg.malysa@timesys.com> * Additional Contact: Nathan Barrett-Morrison <nathan.morrison@timesys.com> * * dm pinctrl implementation for ADI ADSP SoCs * */ #include <dm.h> #include <dm/pinctrl.h> #include <dm/device_compat.h> #include <linux/bitops.h> #include <linux/io.h> #define ADSP_PORT_MMIO_SIZE 0x80 #define ADSP_PORT_PIN_SIZE 16 #define ADSP_PORT_PORT_MUX_BITS 2 #define ADSP_PORT_PORT_MUX_MASK 0x03 #define ADSP_PINCTRL_FUNCTION_COUNT 4 #define ADSP_PORT_REG_FER 0x00 #define ADSP_PORT_REG_FER_SET 0x04 #define ADSP_PORT_REG_FER_CLEAR 0x08 #define ADSP_PORT_REG_DATA 0x0c #define ADSP_PORT_REG_DATA_SET 0x10 #define ADSP_PORT_REG_DATA_CLEAR 0x14 #define ADSP_PORT_REG_DIR 0x18 #define ADSP_PORT_REG_DIR_SET 0x1c #define ADSP_PORT_REG_DIR_CLEAR 0x20 #define ADSP_PORT_REG_INEN 0x24 #define ADSP_PORT_REG_INEN_SET 0x28 #define ADSP_PORT_REG_INEN_CLEAR 0x2c #define ADSP_PORT_REG_PORT_MUX 0x30 #define ADSP_PORT_REG_DATA_TGL 0x34 #define ADSP_PORT_REG_POLAR 0x38 #define ADSP_PORT_REG_POLAR_SET 0x3c #define ADSP_PORT_REG_POLAR_CLEAR 0x40 #define ADSP_PORT_REG_LOCK 0x44 #define ADSP_PORT_REG_TRIG_TGL 0x48 struct adsp_pinctrl_priv { void __iomem *base; int npins; char pinbuf[16]; }; static u32 get_port(unsigned int pin) { return pin / ADSP_PORT_PIN_SIZE; } static u32 get_offset(unsigned int pin) { return pin % ADSP_PORT_PIN_SIZE; } static int adsp_pinctrl_pinmux_set(struct udevice *udev, unsigned int pin, unsigned int func) { struct adsp_pinctrl_priv *priv = dev_get_priv(udev); void __iomem *portbase; u32 port, offset; u32 val; if (pin >= priv->npins) return -ENODEV; if (func >= ADSP_PINCTRL_FUNCTION_COUNT) return -EINVAL; port = get_port(pin); offset = get_offset(pin); portbase = priv->base + port * ADSP_PORT_MMIO_SIZE; val = ioread32(portbase + ADSP_PORT_REG_PORT_MUX); val &= ~(ADSP_PORT_PORT_MUX_MASK << (ADSP_PORT_PORT_MUX_BITS * offset)); val |= func << (ADSP_PORT_PORT_MUX_BITS * offset); iowrite32(val, portbase + ADSP_PORT_REG_PORT_MUX); iowrite32(BIT(offset), portbase + ADSP_PORT_REG_FER_SET); return 0; } static int adsp_pinctrl_set_state(struct udevice *udev, struct udevice *config) { const struct fdt_property *pinlist; int length = 0; int ret, i; u32 pin, function; pinlist = dev_read_prop(config, "adi,pins", &length); if (!pinlist) { dev_err(udev, "missing adi,pins property in pinctrl config node\n"); return -EINVAL; } if (length % (sizeof(uint32_t) * 2)) { dev_err(udev, "adi,pins property must be a multiple of two uint32_ts\n"); return -EINVAL; } for (i = 0; i < length / sizeof(uint32_t); i += 2) { ret = dev_read_u32_index(config, "adi,pins", i, &pin); if (ret) return ret; ret = dev_read_u32_index(config, "adi,pins", i + 1, &function); if (ret) return ret; ret = adsp_pinctrl_pinmux_set(udev, pin, function); if (ret) return ret; } return 0; } const struct pinctrl_ops adsp_pinctrl_ops = { .set_state = adsp_pinctrl_set_state, }; static int adsp_pinctrl_probe(struct udevice *udev) { struct adsp_pinctrl_priv *priv = dev_get_priv(udev); priv->base = dev_read_addr_ptr(udev); priv->npins = dev_read_u32_default(udev, "adi,npins", 0); if (!priv->base) { dev_err(udev, "Missing or invalid pinctrl base address\n"); return -ENOENT; } if (!priv->npins) { dev_err(udev, "Missing adi,npins property!\n"); return -ENOENT; } return 0; } static const struct udevice_id adsp_pinctrl_match[] = { { .compatible = "adi,adsp-pinctrl" }, { }, }; U_BOOT_DRIVER(adi_adsp_pinctrl) = { .name = "adi_adsp_pinctrl", .id = UCLASS_PINCTRL, .of_match = adsp_pinctrl_match, .probe = adsp_pinctrl_probe, .priv_auto = sizeof(struct adsp_pinctrl_priv), .ops = &adsp_pinctrl_ops, .flags = DM_FLAG_PRE_RELOC, }; |