1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2014 Marvell Technology Group Ltd. 4 * 5 * Antoine Tenart <antoine.tenart@free-electrons.com> 6 * Jisheng Zhang <jszhang@marvell.com> 7 */ 8 9 #include <linux/io.h> 10 #include <linux/module.h> 11 #include <linux/of_device.h> 12 #include <linux/phy/phy.h> 13 #include <linux/platform_device.h> 14 #include <linux/reset.h> 15 16 #define USB_PHY_PLL 0x04 17 #define USB_PHY_PLL_CONTROL 0x08 18 #define USB_PHY_TX_CTRL0 0x10 19 #define USB_PHY_TX_CTRL1 0x14 20 #define USB_PHY_TX_CTRL2 0x18 21 #define USB_PHY_RX_CTRL 0x20 22 #define USB_PHY_ANALOG 0x34 23 24 /* USB_PHY_PLL */ 25 #define CLK_REF_DIV(x) ((x) << 4) 26 #define FEEDBACK_CLK_DIV(x) ((x) << 8) 27 28 /* USB_PHY_PLL_CONTROL */ 29 #define CLK_STABLE BIT(0) 30 #define PLL_CTRL_PIN BIT(1) 31 #define PLL_CTRL_REG BIT(2) 32 #define PLL_ON BIT(3) 33 #define PHASE_OFF_TOL_125 (0x0 << 5) 34 #define PHASE_OFF_TOL_250 BIT(5) 35 #define KVC0_CALIB (0x0 << 9) 36 #define KVC0_REG_CTRL BIT(9) 37 #define KVC0_HIGH (0x0 << 10) 38 #define KVC0_LOW (0x3 << 10) 39 #define CLK_BLK_EN BIT(13) 40 41 /* USB_PHY_TX_CTRL0 */ 42 #define EXT_HS_RCAL_EN BIT(3) 43 #define EXT_FS_RCAL_EN BIT(4) 44 #define IMPCAL_VTH_DIV(x) ((x) << 5) 45 #define EXT_RS_RCAL_DIV(x) ((x) << 8) 46 #define EXT_FS_RCAL_DIV(x) ((x) << 12) 47 48 /* USB_PHY_TX_CTRL1 */ 49 #define TX_VDD15_14 (0x0 << 4) 50 #define TX_VDD15_15 BIT(4) 51 #define TX_VDD15_16 (0x2 << 4) 52 #define TX_VDD15_17 (0x3 << 4) 53 #define TX_VDD12_VDD (0x0 << 6) 54 #define TX_VDD12_11 BIT(6) 55 #define TX_VDD12_12 (0x2 << 6) 56 #define TX_VDD12_13 (0x3 << 6) 57 #define LOW_VDD_EN BIT(8) 58 #define TX_OUT_AMP(x) ((x) << 9) 59 60 /* USB_PHY_TX_CTRL2 */ 61 #define TX_CHAN_CTRL_REG(x) ((x) << 0) 62 #define DRV_SLEWRATE(x) ((x) << 4) 63 #define IMP_CAL_FS_HS_DLY_0 (0x0 << 6) 64 #define IMP_CAL_FS_HS_DLY_1 BIT(6) 65 #define IMP_CAL_FS_HS_DLY_2 (0x2 << 6) 66 #define IMP_CAL_FS_HS_DLY_3 (0x3 << 6) 67 #define FS_DRV_EN_MASK(x) ((x) << 8) 68 #define HS_DRV_EN_MASK(x) ((x) << 12) 69 70 /* USB_PHY_RX_CTRL */ 71 #define PHASE_FREEZE_DLY_2_CL (0x0 << 0) 72 #define PHASE_FREEZE_DLY_4_CL BIT(0) 73 #define ACK_LENGTH_8_CL (0x0 << 2) 74 #define ACK_LENGTH_12_CL BIT(2) 75 #define ACK_LENGTH_16_CL (0x2 << 2) 76 #define ACK_LENGTH_20_CL (0x3 << 2) 77 #define SQ_LENGTH_3 (0x0 << 4) 78 #define SQ_LENGTH_6 BIT(4) 79 #define SQ_LENGTH_9 (0x2 << 4) 80 #define SQ_LENGTH_12 (0x3 << 4) 81 #define DISCON_THRESHOLD_260 (0x0 << 6) 82 #define DISCON_THRESHOLD_270 BIT(6) 83 #define DISCON_THRESHOLD_280 (0x2 << 6) 84 #define DISCON_THRESHOLD_290 (0x3 << 6) 85 #define SQ_THRESHOLD(x) ((x) << 8) 86 #define LPF_COEF(x) ((x) << 12) 87 #define INTPL_CUR_10 (0x0 << 14) 88 #define INTPL_CUR_20 BIT(14) 89 #define INTPL_CUR_30 (0x2 << 14) 90 #define INTPL_CUR_40 (0x3 << 14) 91 92 /* USB_PHY_ANALOG */ 93 #define ANA_PWR_UP BIT(1) 94 #define ANA_PWR_DOWN BIT(2) 95 #define V2I_VCO_RATIO(x) ((x) << 7) 96 #define R_ROTATE_90 (0x0 << 10) 97 #define R_ROTATE_0 BIT(10) 98 #define MODE_TEST_EN BIT(11) 99 #define ANA_TEST_DC_CTRL(x) ((x) << 12) 100 101 static const u32 phy_berlin_pll_dividers[] = { 102 /* Berlin 2 */ 103 CLK_REF_DIV(0x6) | FEEDBACK_CLK_DIV(0x55), 104 /* Berlin 2CD/Q */ 105 CLK_REF_DIV(0xc) | FEEDBACK_CLK_DIV(0x54), 106 }; 107 108 struct phy_berlin_usb_priv { 109 void __iomem *base; 110 struct reset_control *rst_ctrl; 111 u32 pll_divider; 112 }; 113 114 static int phy_berlin_usb_power_on(struct phy *phy) 115 { 116 struct phy_berlin_usb_priv *priv = phy_get_drvdata(phy); 117 118 reset_control_reset(priv->rst_ctrl); 119 120 writel(priv->pll_divider, 121 priv->base + USB_PHY_PLL); 122 writel(CLK_STABLE | PLL_CTRL_REG | PHASE_OFF_TOL_250 | KVC0_REG_CTRL | 123 CLK_BLK_EN, priv->base + USB_PHY_PLL_CONTROL); 124 writel(V2I_VCO_RATIO(0x5) | R_ROTATE_0 | ANA_TEST_DC_CTRL(0x5), 125 priv->base + USB_PHY_ANALOG); 126 writel(PHASE_FREEZE_DLY_4_CL | ACK_LENGTH_16_CL | SQ_LENGTH_12 | 127 DISCON_THRESHOLD_270 | SQ_THRESHOLD(0xa) | LPF_COEF(0x2) | 128 INTPL_CUR_30, priv->base + USB_PHY_RX_CTRL); 129 130 writel(TX_VDD12_13 | TX_OUT_AMP(0x3), priv->base + USB_PHY_TX_CTRL1); 131 writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4), 132 priv->base + USB_PHY_TX_CTRL0); 133 134 writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4) | 135 EXT_FS_RCAL_DIV(0x2), priv->base + USB_PHY_TX_CTRL0); 136 137 writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4), 138 priv->base + USB_PHY_TX_CTRL0); 139 writel(TX_CHAN_CTRL_REG(0xf) | DRV_SLEWRATE(0x3) | IMP_CAL_FS_HS_DLY_3 | 140 FS_DRV_EN_MASK(0xd), priv->base + USB_PHY_TX_CTRL2); 141 142 return 0; 143 } 144 145 static const struct phy_ops phy_berlin_usb_ops = { 146 .power_on = phy_berlin_usb_power_on, 147 .owner = THIS_MODULE, 148 }; 149 150 static const struct of_device_id phy_berlin_usb_of_match[] = { 151 { 152 .compatible = "marvell,berlin2-usb-phy", 153 .data = &phy_berlin_pll_dividers[0], 154 }, 155 { 156 .compatible = "marvell,berlin2cd-usb-phy", 157 .data = &phy_berlin_pll_dividers[1], 158 }, 159 { }, 160 }; 161 MODULE_DEVICE_TABLE(of, phy_berlin_usb_of_match); 162 163 static int phy_berlin_usb_probe(struct platform_device *pdev) 164 { 165 const struct of_device_id *match = 166 of_match_device(phy_berlin_usb_of_match, &pdev->dev); 167 struct phy_berlin_usb_priv *priv; 168 struct phy *phy; 169 struct phy_provider *phy_provider; 170 171 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 172 if (!priv) 173 return -ENOMEM; 174 175 priv->base = devm_platform_ioremap_resource(pdev, 0); 176 if (IS_ERR(priv->base)) 177 return PTR_ERR(priv->base); 178 179 priv->rst_ctrl = devm_reset_control_get(&pdev->dev, NULL); 180 if (IS_ERR(priv->rst_ctrl)) 181 return PTR_ERR(priv->rst_ctrl); 182 183 priv->pll_divider = *((u32 *)match->data); 184 185 phy = devm_phy_create(&pdev->dev, NULL, &phy_berlin_usb_ops); 186 if (IS_ERR(phy)) { 187 dev_err(&pdev->dev, "failed to create PHY\n"); 188 return PTR_ERR(phy); 189 } 190 191 phy_set_drvdata(phy, priv); 192 193 phy_provider = 194 devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); 195 return PTR_ERR_OR_ZERO(phy_provider); 196 } 197 198 static struct platform_driver phy_berlin_usb_driver = { 199 .probe = phy_berlin_usb_probe, 200 .driver = { 201 .name = "phy-berlin-usb", 202 .of_match_table = phy_berlin_usb_of_match, 203 }, 204 }; 205 module_platform_driver(phy_berlin_usb_driver); 206 207 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); 208 MODULE_DESCRIPTION("Marvell Berlin PHY driver for USB"); 209 MODULE_LICENSE("GPL"); 210