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/*
* Renesas USB driver R-Car Gen. 3 initialization and power control
*
* Copyright (C) 2016 Renesas Electronics Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/delay.h>
#include <linux/io.h>
#include "common.h"
#include "rcar3.h"
#define LPSTS 0x102
#define UGCTRL2 0x184 /* 32-bit register */
/* Low Power Status register (LPSTS) */
#define LPSTS_SUSPM 0x4000
/* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */
#define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */
#define UGCTRL2_USB0SEL_OTG 0x00000030
static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)
{
iowrite32(data, priv->base + reg);
}
static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
void __iomem *base, int enable)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG);
if (enable) {
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
/* The controller on R-Car Gen3 needs to wait up to 45 usec */
udelay(45);
} else {
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
}
return 0;
}
static int usbhs_rcar3_get_id(struct platform_device *pdev)
{
return USBHS_GADGET;
}
const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = {
.power_ctrl = usbhs_rcar3_power_ctrl,
.get_id = usbhs_rcar3_get_id,
};
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