2 * Renesas USB driver R-Car Gen. 3 initialization and power control
4 * Copyright (C) 2016 Renesas Electronics Corporation
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.
12 #include <linux/delay.h>
18 #define UGCTRL2 0x184 /* 32-bit register */
20 /* Low Power Status register (LPSTS) */
21 #define LPSTS_SUSPM 0x4000
23 /* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */
24 #define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */
25 #define UGCTRL2_USB0SEL_OTG 0x00000030
27 static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)
29 iowrite32(data, priv->base + reg);
32 static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
33 void __iomem *base, int enable)
35 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
37 usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG);
40 usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
41 /* The controller on R-Car Gen3 needs to wait up to 45 usec */
44 usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
50 static int usbhs_rcar3_get_id(struct platform_device *pdev)
55 const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = {
56 .power_ctrl = usbhs_rcar3_power_ctrl,
57 .get_id = usbhs_rcar3_get_id,