1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver 4 * 5 * Copyright (C) 2016 David Lechner <david@lechnology.com> 6 */ 7 8 #include <linux/clk.h> 9 #include <linux/io.h> 10 #include <linux/of.h> 11 #include <linux/mfd/da8xx-cfgchip.h> 12 #include <linux/mfd/syscon.h> 13 #include <linux/module.h> 14 #include <linux/phy/phy.h> 15 #include <linux/platform_data/phy-da8xx-usb.h> 16 #include <linux/platform_device.h> 17 #include <linux/regmap.h> 18 19 #define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) 20 21 struct da8xx_usb_phy { 22 struct phy_provider *phy_provider; 23 struct phy *usb11_phy; 24 struct phy *usb20_phy; 25 struct clk *usb11_clk; 26 struct clk *usb20_clk; 27 struct regmap *regmap; 28 }; 29 30 static int da8xx_usb11_phy_power_on(struct phy *phy) 31 { 32 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); 33 int ret; 34 35 ret = clk_prepare_enable(d_phy->usb11_clk); 36 if (ret) 37 return ret; 38 39 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 40 CFGCHIP2_USB1SUSPENDM); 41 42 return 0; 43 } 44 45 static int da8xx_usb11_phy_power_off(struct phy *phy) 46 { 47 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); 48 49 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0); 50 51 clk_disable_unprepare(d_phy->usb11_clk); 52 53 return 0; 54 } 55 56 static const struct phy_ops da8xx_usb11_phy_ops = { 57 .power_on = da8xx_usb11_phy_power_on, 58 .power_off = da8xx_usb11_phy_power_off, 59 .owner = THIS_MODULE, 60 }; 61 62 static int da8xx_usb20_phy_power_on(struct phy *phy) 63 { 64 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); 65 int ret; 66 67 ret = clk_prepare_enable(d_phy->usb20_clk); 68 if (ret) 69 return ret; 70 71 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0); 72 73 return 0; 74 } 75 76 static int da8xx_usb20_phy_power_off(struct phy *phy) 77 { 78 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); 79 80 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 81 CFGCHIP2_OTGPWRDN); 82 83 clk_disable_unprepare(d_phy->usb20_clk); 84 85 return 0; 86 } 87 88 static int da8xx_usb20_phy_set_mode(struct phy *phy, 89 enum phy_mode mode, int submode) 90 { 91 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); 92 u32 val; 93 94 switch (mode) { 95 case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */ 96 val = CFGCHIP2_OTGMODE_FORCE_HOST; 97 break; 98 case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */ 99 val = CFGCHIP2_OTGMODE_FORCE_DEVICE; 100 break; 101 case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */ 102 val = CFGCHIP2_OTGMODE_NO_OVERRIDE; 103 break; 104 default: 105 return -EINVAL; 106 } 107 108 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK, 109 val); 110 111 return 0; 112 } 113 114 static const struct phy_ops da8xx_usb20_phy_ops = { 115 .power_on = da8xx_usb20_phy_power_on, 116 .power_off = da8xx_usb20_phy_power_off, 117 .set_mode = da8xx_usb20_phy_set_mode, 118 .owner = THIS_MODULE, 119 }; 120 121 static struct phy *da8xx_usb_phy_of_xlate(struct device *dev, 122 struct of_phandle_args *args) 123 { 124 struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev); 125 126 if (!d_phy) 127 return ERR_PTR(-ENODEV); 128 129 switch (args->args[0]) { 130 case 0: 131 return d_phy->usb20_phy; 132 case 1: 133 return d_phy->usb11_phy; 134 default: 135 return ERR_PTR(-EINVAL); 136 } 137 } 138 139 static int da8xx_usb_phy_probe(struct platform_device *pdev) 140 { 141 struct device *dev = &pdev->dev; 142 struct da8xx_usb_phy_platform_data *pdata = dev->platform_data; 143 struct device_node *node = dev->of_node; 144 struct da8xx_usb_phy *d_phy; 145 146 d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL); 147 if (!d_phy) 148 return -ENOMEM; 149 150 if (pdata) 151 d_phy->regmap = pdata->cfgchip; 152 else 153 d_phy->regmap = syscon_regmap_lookup_by_compatible( 154 "ti,da830-cfgchip"); 155 if (IS_ERR(d_phy->regmap)) { 156 dev_err(dev, "Failed to get syscon\n"); 157 return PTR_ERR(d_phy->regmap); 158 } 159 160 d_phy->usb11_clk = devm_clk_get(dev, "usb1_clk48"); 161 if (IS_ERR(d_phy->usb11_clk)) { 162 dev_err(dev, "Failed to get usb1_clk48\n"); 163 return PTR_ERR(d_phy->usb11_clk); 164 } 165 166 d_phy->usb20_clk = devm_clk_get(dev, "usb0_clk48"); 167 if (IS_ERR(d_phy->usb20_clk)) { 168 dev_err(dev, "Failed to get usb0_clk48\n"); 169 return PTR_ERR(d_phy->usb20_clk); 170 } 171 172 d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops); 173 if (IS_ERR(d_phy->usb11_phy)) { 174 dev_err(dev, "Failed to create usb11 phy\n"); 175 return PTR_ERR(d_phy->usb11_phy); 176 } 177 178 d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops); 179 if (IS_ERR(d_phy->usb20_phy)) { 180 dev_err(dev, "Failed to create usb20 phy\n"); 181 return PTR_ERR(d_phy->usb20_phy); 182 } 183 184 platform_set_drvdata(pdev, d_phy); 185 phy_set_drvdata(d_phy->usb11_phy, d_phy); 186 phy_set_drvdata(d_phy->usb20_phy, d_phy); 187 188 if (node) { 189 d_phy->phy_provider = devm_of_phy_provider_register(dev, 190 da8xx_usb_phy_of_xlate); 191 if (IS_ERR(d_phy->phy_provider)) { 192 dev_err(dev, "Failed to create phy provider\n"); 193 return PTR_ERR(d_phy->phy_provider); 194 } 195 } else { 196 int ret; 197 198 ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy", 199 "ohci-da8xx"); 200 if (ret) 201 dev_warn(dev, "Failed to create usb11 phy lookup\n"); 202 ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy", 203 "musb-da8xx"); 204 if (ret) 205 dev_warn(dev, "Failed to create usb20 phy lookup\n"); 206 } 207 208 regmap_write_bits(d_phy->regmap, CFGCHIP(2), 209 PHY_INIT_BITS, PHY_INIT_BITS); 210 211 return 0; 212 } 213 214 static int da8xx_usb_phy_remove(struct platform_device *pdev) 215 { 216 struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev); 217 218 if (!pdev->dev.of_node) { 219 phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx"); 220 phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx"); 221 } 222 223 return 0; 224 } 225 226 static const struct of_device_id da8xx_usb_phy_ids[] = { 227 { .compatible = "ti,da830-usb-phy" }, 228 { } 229 }; 230 MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids); 231 232 static struct platform_driver da8xx_usb_phy_driver = { 233 .probe = da8xx_usb_phy_probe, 234 .remove = da8xx_usb_phy_remove, 235 .driver = { 236 .name = "da8xx-usb-phy", 237 .of_match_table = da8xx_usb_phy_ids, 238 }, 239 }; 240 241 module_platform_driver(da8xx_usb_phy_driver); 242 243 MODULE_ALIAS("platform:da8xx-usb-phy"); 244 MODULE_AUTHOR("David Lechner <david@lechnology.com>"); 245 MODULE_DESCRIPTION("TI DA8xx USB PHY driver"); 246 MODULE_LICENSE("GPL v2"); 247