mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
5fd54ace47
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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 UGCTRL 0x180 /* 32-bit register */
|
|
#define UGCTRL2 0x184 /* 32-bit register */
|
|
#define UGSTS 0x188 /* 32-bit register */
|
|
|
|
/* Low Power Status register (LPSTS) */
|
|
#define LPSTS_SUSPM 0x4000
|
|
|
|
/* R-Car D3 only: USB General control register (UGCTRL) */
|
|
#define UGCTRL_PLLRESET 0x00000001
|
|
#define UGCTRL_CONNECT 0x00000004
|
|
|
|
/*
|
|
* USB General control register 2 (UGCTRL2)
|
|
* Remarks: bit[31:11] and bit[9:6] should be 0
|
|
*/
|
|
#define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */
|
|
#define UGCTRL2_USB0SEL_HSUSB 0x00000020
|
|
#define UGCTRL2_USB0SEL_OTG 0x00000030
|
|
#define UGCTRL2_VBUSSEL 0x00000400
|
|
|
|
/* R-Car D3 only: USB General status register (UGSTS) */
|
|
#define UGSTS_LOCK 0x00000100
|
|
|
|
static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)
|
|
{
|
|
iowrite32(data, priv->base + reg);
|
|
}
|
|
|
|
static u32 usbhs_read32(struct usbhs_priv *priv, u32 reg)
|
|
{
|
|
return ioread32(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 |
|
|
UGCTRL2_VBUSSEL);
|
|
|
|
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;
|
|
}
|
|
|
|
/* R-Car D3 needs to release UGCTRL.PLLRESET */
|
|
static int usbhs_rcar3_power_and_pll_ctrl(struct platform_device *pdev,
|
|
void __iomem *base, int enable)
|
|
{
|
|
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
|
|
u32 val;
|
|
int timeout = 1000;
|
|
|
|
if (enable) {
|
|
usbhs_write32(priv, UGCTRL, 0); /* release PLLRESET */
|
|
usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 |
|
|
UGCTRL2_USB0SEL_HSUSB);
|
|
|
|
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
|
|
do {
|
|
val = usbhs_read32(priv, UGSTS);
|
|
udelay(1);
|
|
} while (!(val & UGSTS_LOCK) && timeout--);
|
|
usbhs_write32(priv, UGCTRL, UGCTRL_CONNECT);
|
|
} else {
|
|
usbhs_write32(priv, UGCTRL, 0);
|
|
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
|
|
usbhs_write32(priv, UGCTRL, UGCTRL_PLLRESET);
|
|
}
|
|
|
|
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,
|
|
};
|
|
|
|
const struct renesas_usbhs_platform_callback usbhs_rcar3_with_pll_ops = {
|
|
.power_ctrl = usbhs_rcar3_power_and_pll_ctrl,
|
|
.get_id = usbhs_rcar3_get_id,
|
|
};
|