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// SPDX-License-Identifier: GPL-2.0+
/*
* drivers/usb/gadget/dwc2_udc_otg.c
* Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
*
* Copyright (C) 2008 for Samsung Electronics
*
* BSP Support for Samsung's UDC driver
* available at:
* git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
*
* State machine bugfixes:
* Marek Szyprowski <m.szyprowski@samsung.com>
*
* Ported to u-boot:
* Marek Szyprowski <m.szyprowski@samsung.com>
* Lukasz Majewski <l.majewski@samsumg.com>
*/
#include <common.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <malloc.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <asm/io.h>
#include <asm/mach-types.h>
#include "dwc2_udc_otg_regs.h"
#include "dwc2_udc_otg_priv.h"
#include <usb/dwc2_udc.h>
void otg_phy_init(struct dwc2_udc *dev)
{
unsigned int usb_phy_ctrl = dev->pdata->usb_phy_ctrl;
struct dwc2_usbotg_phy *phy =
(struct dwc2_usbotg_phy *)dev->pdata->regs_phy;
dev->pdata->phy_control(1);
/* USB PHY0 Enable */
printf("USB PHY0 Enable\n");
/* Enable PHY */
writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
writel((readl(&phy->phypwr)
&~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
&~FORCE_SUSPEND_0), &phy->phypwr);
else /* C110 GONI */
writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
&~FORCE_SUSPEND_0), &phy->phypwr);
if (s5p_cpu_id == 0x4412)
writel((readl(&phy->phyclk) & ~(EXYNOS4X12_ID_PULLUP0 |
EXYNOS4X12_COMMON_ON_N0)) | EXYNOS4X12_CLK_SEL_24MHZ,
&phy->phyclk); /* PLL 24Mhz */
else
writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)) |
CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
| PHY_SW_RST0, &phy->rstcon);
udelay(10);
writel(readl(&phy->rstcon)
&~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
udelay(10);
}
void otg_phy_off(struct dwc2_udc *dev)
{
unsigned int usb_phy_ctrl = dev->pdata->usb_phy_ctrl;
struct dwc2_usbotg_phy *phy =
(struct dwc2_usbotg_phy *)dev->pdata->regs_phy;
/* reset controller just in case */
writel(PHY_SW_RST0, &phy->rstcon);
udelay(20);
writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
udelay(20);
writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
| FORCE_SUSPEND_0, &phy->phypwr);
writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
&phy->phyclk);
udelay(10000);
dev->pdata->phy_control(0);
}
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