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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2017, STMicroelectronics - All Rights Reserved * Author(s): Patrice Chotard, <patrice.chotard@foss.st.com> for STMicroelectronics. */ #include <log.h> #include <asm/global_data.h> #include <asm/io.h> #include <bitfield.h> #include <dm.h> #include <errno.h> #include <fdtdec.h> #include <generic-phy.h> #include <linux/libfdt.h> #include <regmap.h> #include <reset-uclass.h> #include <syscon.h> #include <wait_bit.h> #include <linux/printk.h> #include <linux/bitops.h> #include <linux/compat.h> DECLARE_GLOBAL_DATA_PTR; /* Default PHY_SEL and REFCLKSEL configuration */ #define STIH407_USB_PICOPHY_CTRL_PORT_CONF 0x6 /* ports parameters overriding */ #define STIH407_USB_PICOPHY_PARAM_DEF 0x39a4dc #define PHYPARAM_REG 1 #define PHYCTRL_REG 2 #define PHYPARAM_NB 3 struct sti_usb_phy { struct regmap *regmap; struct reset_ctl global_ctl; struct reset_ctl port_ctl; int param; int ctrl; }; static int sti_usb_phy_deassert(struct sti_usb_phy *phy) { int ret; ret = reset_deassert(&phy->global_ctl); if (ret < 0) { pr_err("PHY global deassert failed: %d", ret); return ret; } ret = reset_deassert(&phy->port_ctl); if (ret < 0) pr_err("PHY port deassert failed: %d", ret); return ret; } static int sti_usb_phy_init(struct phy *usb_phy) { struct udevice *dev = usb_phy->dev; struct sti_usb_phy *phy = dev_get_priv(dev); void __iomem *reg; /* set ctrl picophy value */ reg = (void __iomem *)phy->regmap->ranges[0].start + phy->ctrl; /* CTRL_PORT mask is 0x1f */ clrsetbits_le32(reg, 0x1f, STIH407_USB_PICOPHY_CTRL_PORT_CONF); /* set ports parameters overriding */ reg = (void __iomem *)phy->regmap->ranges[0].start + phy->param; /* PARAM_DEF mask is 0xffffffff */ clrsetbits_le32(reg, 0xffffffff, STIH407_USB_PICOPHY_PARAM_DEF); return sti_usb_phy_deassert(phy); } static int sti_usb_phy_exit(struct phy *usb_phy) { struct udevice *dev = usb_phy->dev; struct sti_usb_phy *phy = dev_get_priv(dev); int ret; ret = reset_assert(&phy->port_ctl); if (ret < 0) { pr_err("PHY port assert failed: %d", ret); return ret; } ret = reset_assert(&phy->global_ctl); if (ret < 0) pr_err("PHY global assert failed: %d", ret); return ret; } struct phy_ops sti_usb_phy_ops = { .init = sti_usb_phy_init, .exit = sti_usb_phy_exit, }; int sti_usb_phy_probe(struct udevice *dev) { struct sti_usb_phy *priv = dev_get_priv(dev); struct udevice *syscon; struct ofnode_phandle_args syscfg_phandle; u32 cells[PHYPARAM_NB]; int ret, count; /* get corresponding syscon phandle */ ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, &syscfg_phandle); if (ret < 0) { pr_err("Can't get syscfg phandle: %d\n", ret); return ret; } ret = uclass_get_device_by_ofnode(UCLASS_SYSCON, syscfg_phandle.node, &syscon); if (ret) { pr_err("unable to find syscon device (%d)\n", ret); return ret; } priv->regmap = syscon_get_regmap(syscon); if (!priv->regmap) { pr_err("unable to find regmap\n"); return -ENODEV; } /* get phy param offset */ count = fdtdec_get_int_array_count(gd->fdt_blob, dev_of_offset(dev), "st,syscfg", cells, ARRAY_SIZE(cells)); if (count < 0) { pr_err("Bad PHY st,syscfg property %d\n", count); return -EINVAL; } if (count > PHYPARAM_NB) { pr_err("Unsupported PHY param count %d\n", count); return -EINVAL; } priv->param = cells[PHYPARAM_REG]; priv->ctrl = cells[PHYCTRL_REG]; /* get global reset control */ ret = reset_get_by_name(dev, "global", &priv->global_ctl); if (ret) { pr_err("can't get global reset for %s (%d)", dev->name, ret); return ret; } /* get port reset control */ ret = reset_get_by_name(dev, "port", &priv->port_ctl); if (ret) { pr_err("can't get port reset for %s (%d)", dev->name, ret); return ret; } return 0; } static const struct udevice_id sti_usb_phy_ids[] = { { .compatible = "st,stih407-usb2-phy" }, { } }; U_BOOT_DRIVER(sti_usb_phy) = { .name = "sti_usb_phy", .id = UCLASS_PHY, .of_match = sti_usb_phy_ids, .probe = sti_usb_phy_probe, .ops = &sti_usb_phy_ops, .priv_auto = sizeof(struct sti_usb_phy), }; |