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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2020 NovaTech LLC * George McCollister <george.mccollister@gmail.com> */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/mdio.h> #include <linux/module.h> #include <linux/phy.h> #include <linux/if_vlan.h> #include <linux/of.h> #include "xrs700x.h" #include "xrs700x_reg.h" #define XRS_MDIO_IBA0 0x10 #define XRS_MDIO_IBA1 0x11 #define XRS_MDIO_IBD 0x14 #define XRS_IB_READ 0x0 #define XRS_IB_WRITE 0x1 static int xrs700x_mdio_reg_read(void *context, unsigned int reg, unsigned int *val) { struct mdio_device *mdiodev = context; struct device *dev = &mdiodev->dev; u16 uval; int ret; uval = (u16)FIELD_GET(GENMASK(31, 16), reg); ret = mdiobus_write(mdiodev->bus, mdiodev->addr, XRS_MDIO_IBA1, uval); if (ret < 0) { dev_err(dev, "xrs mdiobus_write returned %d\n", ret); return ret; } uval = (u16)((reg & GENMASK(15, 1)) | XRS_IB_READ); ret = mdiobus_write(mdiodev->bus, mdiodev->addr, XRS_MDIO_IBA0, uval); if (ret < 0) { dev_err(dev, "xrs mdiobus_write returned %d\n", ret); return ret; } ret = mdiobus_read(mdiodev->bus, mdiodev->addr, XRS_MDIO_IBD); if (ret < 0) { dev_err(dev, "xrs mdiobus_read returned %d\n", ret); return ret; } *val = (unsigned int)ret; return 0; } static int xrs700x_mdio_reg_write(void *context, unsigned int reg, unsigned int val) { struct mdio_device *mdiodev = context; struct device *dev = &mdiodev->dev; u16 uval; int ret; ret = mdiobus_write(mdiodev->bus, mdiodev->addr, XRS_MDIO_IBD, (u16)val); if (ret < 0) { dev_err(dev, "xrs mdiobus_write returned %d\n", ret); return ret; } uval = (u16)FIELD_GET(GENMASK(31, 16), reg); ret = mdiobus_write(mdiodev->bus, mdiodev->addr, XRS_MDIO_IBA1, uval); if (ret < 0) { dev_err(dev, "xrs mdiobus_write returned %d\n", ret); return ret; } uval = (u16)((reg & GENMASK(15, 1)) | XRS_IB_WRITE); ret = mdiobus_write(mdiodev->bus, mdiodev->addr, XRS_MDIO_IBA0, uval); if (ret < 0) { dev_err(dev, "xrs mdiobus_write returned %d\n", ret); return ret; } return 0; } static const struct regmap_config xrs700x_mdio_regmap_config = { .val_bits = 16, .reg_stride = 2, .reg_bits = 32, .pad_bits = 0, .write_flag_mask = 0, .read_flag_mask = 0, .reg_read = xrs700x_mdio_reg_read, .reg_write = xrs700x_mdio_reg_write, .max_register = XRS_VLAN(VLAN_N_VID - 1), .cache_type = REGCACHE_NONE, .reg_format_endian = REGMAP_ENDIAN_BIG, .val_format_endian = REGMAP_ENDIAN_BIG }; static int xrs700x_mdio_probe(struct mdio_device *mdiodev) { struct xrs700x *priv; int ret; priv = xrs700x_switch_alloc(&mdiodev->dev, mdiodev); if (!priv) return -ENOMEM; priv->regmap = devm_regmap_init(&mdiodev->dev, NULL, mdiodev, &xrs700x_mdio_regmap_config); if (IS_ERR(priv->regmap)) { ret = PTR_ERR(priv->regmap); dev_err(&mdiodev->dev, "Failed to initialize regmap: %d\n", ret); return ret; } dev_set_drvdata(&mdiodev->dev, priv); ret = xrs700x_switch_register(priv); /* Main DSA driver may not be started yet. */ if (ret) return ret; return 0; } static void xrs700x_mdio_remove(struct mdio_device *mdiodev) { struct xrs700x *priv = dev_get_drvdata(&mdiodev->dev); xrs700x_switch_remove(priv); } static const struct of_device_id __maybe_unused xrs700x_mdio_dt_ids[] = { { .compatible = "arrow,xrs7003e", .data = &xrs7003e_info }, { .compatible = "arrow,xrs7003f", .data = &xrs7003f_info }, { .compatible = "arrow,xrs7004e", .data = &xrs7004e_info }, { .compatible = "arrow,xrs7004f", .data = &xrs7004f_info }, {}, }; MODULE_DEVICE_TABLE(of, xrs700x_mdio_dt_ids); static struct mdio_driver xrs700x_mdio_driver = { .mdiodrv.driver = { .name = "xrs700x-mdio", .of_match_table = of_match_ptr(xrs700x_mdio_dt_ids), }, .probe = xrs700x_mdio_probe, .remove = xrs700x_mdio_remove, }; mdio_module_driver(xrs700x_mdio_driver); MODULE_AUTHOR("George McCollister <george.mccollister@gmail.com>"); MODULE_DESCRIPTION("Arrow SpeedChips XRS700x DSA MDIO driver"); MODULE_LICENSE("GPL v2"); |