1 /* 2 * Renesas USB driver R-Car Gen. 3 initialization and power control 3 * 4 * Copyright (C) 2016 Renesas Electronics Corporation 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 */ 11 12 #include <linux/io.h> 13 #include "common.h" 14 #include "rcar3.h" 15 16 #define LPSTS 0x102 17 #define UGCTRL2 0x184 /* 32-bit register */ 18 19 /* Low Power Status register (LPSTS) */ 20 #define LPSTS_SUSPM 0x4000 21 22 /* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */ 23 #define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */ 24 #define UGCTRL2_USB0SEL_OTG 0x00000030 25 26 static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data) 27 { 28 iowrite32(data, priv->base + reg); 29 } 30 31 static int usbhs_rcar3_power_ctrl(struct platform_device *pdev, 32 void __iomem *base, int enable) 33 { 34 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 35 36 usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG); 37 38 if (enable) 39 usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM); 40 else 41 usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0); 42 43 return 0; 44 } 45 46 static int usbhs_rcar3_get_id(struct platform_device *pdev) 47 { 48 return USBHS_GADGET; 49 } 50 51 const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = { 52 .power_ctrl = usbhs_rcar3_power_ctrl, 53 .get_id = usbhs_rcar3_get_id, 54 }; 55