drivers/usb/musb-new/mt85xx.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Mediatek "glue layer"
  *
  * Copyright (C) 2019-2021 by Mediatek
  * Based on the AllWinner SUNXI "glue layer" code.
  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
  * Copyright (C) 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
  *
  * This file is part of the Inventra Controller Driver for Linux.
  */
 #include <common.h>
 #include <clk.h>
 #include <dm.h>
 #include <dm/device_compat.h>
 #include <dm/lists.h>
 #include <dm/root.h>
 #include <linux/delay.h>
 #include <linux/printk.h>
 #include <linux/usb/musb.h>
 #include <usb.h>
 #include "linux-compat.h"
 #include "musb_core.h"
 #include "musb_uboot.h"

 #define DBG_I(fmt, ...) \
 	pr_info(fmt, ##__VA_ARGS__)

 struct mtk_musb_config {
 	struct musb_hdrc_config *config;
 };

 struct mtk_musb_glue {
 	struct musb_host_data mdata;
 	struct clk usbpllclk;
 	struct clk usbmcuclk;
 	struct clk usbclk;
 	struct mtk_musb_config *cfg;
 	struct device dev;
 };

 #define to_mtk_musb_glue(d)	container_of(d, struct mtk_musb_glue, dev)

 /******************************************************************************
  * phy settings
  ******************************************************************************/
 #define USB20_PHY_BASE			0x11110800
 #define USBPHY_READ8(offset)	 \
 	readb((void *)(USB20_PHY_BASE + (offset)))
 #define USBPHY_WRITE8(offset, value)	\
 	writeb(value, (void *)(USB20_PHY_BASE + (offset)))
 #define USBPHY_SET8(offset, mask)	\
 	USBPHY_WRITE8(offset, (USBPHY_READ8(offset)) | (mask))
 #define USBPHY_CLR8(offset, mask)	\
 	USBPHY_WRITE8(offset, (USBPHY_READ8(offset)) & (~(mask)))

 static void mt_usb_phy_poweron(void)
 {
 	/*
 	 * switch to USB function.
 	 * (system register, force ip into usb mode).
 	 */
 	USBPHY_CLR8(0x6b, 0x04);
 	USBPHY_CLR8(0x6e, 0x01);
 	USBPHY_CLR8(0x21, 0x03);

 	/* RG_USB20_BC11_SW_EN = 1'b0 */
 	USBPHY_SET8(0x22, 0x04);
 	USBPHY_CLR8(0x1a, 0x80);

 	/* RG_USB20_DP_100K_EN = 1'b0 */
 	/* RG_USB20_DP_100K_EN = 1'b0 */
 	USBPHY_CLR8(0x22, 0x03);

 	/*OTG enable*/
 	USBPHY_SET8(0x20, 0x10);
 	/* release force suspendm */
 	USBPHY_CLR8(0x6a, 0x04);

 	mdelay(800);

 	/* force enter device mode */
 	USBPHY_CLR8(0x6c, 0x10);
 	USBPHY_SET8(0x6c, 0x2E);
 	USBPHY_SET8(0x6d, 0x3E);
 }

 static void mt_usb_phy_savecurrent(void)
 {
 	/*
 	 * switch to USB function.
 	 * (system register, force ip into usb mode).
 	 */
 	USBPHY_CLR8(0x6b, 0x04);
 	USBPHY_CLR8(0x6e, 0x01);
 	USBPHY_CLR8(0x21, 0x03);

 	/* release force suspendm */
 	USBPHY_CLR8(0x6a, 0x04);
 	USBPHY_SET8(0x68, 0x04);
 	/* RG_DPPULLDOWN./RG_DMPULLDOWN. */
 	USBPHY_SET8(0x68, 0xc0);
 	/* RG_XCVRSEL[1:0] = 2'b01 */
 	USBPHY_CLR8(0x68, 0x30);
 	USBPHY_SET8(0x68, 0x10);
 	/* RG_TERMSEL = 1'b1 */
 	USBPHY_SET8(0x68, 0x04);
 	/* RG_DATAIN[3:0] = 4'b0000 */
 	USBPHY_CLR8(0x69, 0x3c);

 	/*
 	 * force_dp_pulldown, force_dm_pulldown,
 	 * force_xcversel, force_termsel.
 	 */
 	USBPHY_SET8(0x6a, 0xba);

 	/* RG_USB20_BC11_SW_EN = 1'b0 */
 	USBPHY_CLR8(0x1a, 0x80);
 	/* RG_USB20_OTG_VBUSSCMP_EN = 1'b0 */
 	USBPHY_CLR8(0x1a, 0x10);

 	mdelay(800);

 	USBPHY_CLR8(0x6a, 0x04);
 	/* rg_usb20_pll_stable = 1 */
 	//USBPHY_SET8(0x63, 0x02);

 	mdelay(1);

 	/* force suspendm = 1 */
 	//USBPHY_SET8(0x6a, 0x04);
 }

 static void mt_usb_phy_recover(void)
 {
 	/* clean PUPD_BIST_EN */
 	/* PUPD_BIST_EN = 1'b0 */
 	/* PMIC will use it to detect charger type */
 	USBPHY_CLR8(0x1d, 0x10);

 	/* force_uart_en = 1'b0 */
 	USBPHY_CLR8(0x6b, 0x04);
 	/* RG_UART_EN = 1'b0 */
 	USBPHY_CLR8(0x6e, 0x01);
 	/* force_uart_en = 1'b0 */
 	USBPHY_CLR8(0x6a, 0x04);

 	USBPHY_CLR8(0x21, 0x03);
 	USBPHY_CLR8(0x68, 0xf4);

 	/* RG_DATAIN[3:0] = 4'b0000 */
 	USBPHY_CLR8(0x69, 0x3c);

 	USBPHY_CLR8(0x6a, 0xba);

 	/* RG_USB20_BC11_SW_EN = 1'b0 */
 	USBPHY_CLR8(0x1a, 0x80);
 	/* RG_USB20_OTG_VBUSSCMP_EN = 1'b1 */
 	USBPHY_SET8(0x1a, 0x10);

 	//HQA adjustment
 	USBPHY_CLR8(0x18, 0x08);
 	USBPHY_SET8(0x18, 0x06);
 	mdelay(800);

 	/* force enter device mode */
 	//USBPHY_CLR8(0x6c, 0x10);
 	//USBPHY_SET8(0x6c, 0x2E);
 	//USBPHY_SET8(0x6d, 0x3E);

 	/* enable VRT internal R architecture */
 	/* RG_USB20_INTR_EN = 1'b1 */
 	USBPHY_SET8(0x00, 0x20);
 }

 /******************************************************************************
  * MUSB Glue code
  ******************************************************************************/

 static irqreturn_t mtk_musb_interrupt(int irq, void *__hci)
 {
 	struct musb		*musb = __hci;
 	irqreturn_t		retval = IRQ_NONE;

 	/* read and flush interrupts */
 	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
 //	last_int_usb = musb->int_usb;
 	if (musb->int_usb)
 		musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
 	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
 	if (musb->int_tx)
 		musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
 	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
 	if (musb->int_rx)
 		musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);

 	if (musb->int_usb || musb->int_tx || musb->int_rx)
 		retval |= musb_interrupt(musb);

 	return retval;
 }

 /* musb_core does not call enable / disable in a balanced manner <sigh> */
 static bool enabled;

 static int mtk_musb_enable(struct musb *musb)
 {
 	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);

 	DBG_I("%s():\n", __func__);

 	musb_ep_select(musb->mregs, 0);
 	musb_writeb(musb->mregs, MUSB_FADDR, 0);

 	if (enabled)
 		return 0;

 	mt_usb_phy_recover();

 	enabled = true;

 	return 0;
 }

 static void mtk_musb_disable(struct musb *musb)
 {
 	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
 	int ret;

 	DBG_I("%s():\n", __func__);

 	if (!enabled)
 		return;

 	mt_usb_phy_savecurrent();

 	enabled = false;
 }

 static int mtk_musb_init(struct musb *musb)
 {
 	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
 	int ret;

 	DBG_I("%s():\n", __func__);

 	ret = clk_enable(&glue->usbpllclk);
 	if (ret) {
 		dev_err(musb->controller, "failed to enable usbpll clock\n");
 		return ret;
 	}
 	ret = clk_enable(&glue->usbmcuclk);
 	if (ret) {
 		dev_err(musb->controller, "failed to enable usbmcu clock\n");
 		return ret;
 	}
 	ret = clk_enable(&glue->usbclk);
 	if (ret) {
 		dev_err(musb->controller, "failed to enable usb clock\n");
 		return ret;
 	}

 	musb->isr = mtk_musb_interrupt;

 	return 0;
 }

 static int mtk_musb_exit(struct musb *musb)
 {
 	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);

 	clk_disable(&glue->usbclk);
 	clk_disable(&glue->usbmcuclk);
 	clk_disable(&glue->usbpllclk);

 	return 0;
 }

 static const struct musb_platform_ops mtk_musb_ops = {
 	.init		= mtk_musb_init,
 	.exit		= mtk_musb_exit,
 	.enable		= mtk_musb_enable,
 	.disable	= mtk_musb_disable,
 };

 /* MTK OTG supports up to 7 endpoints */
 #define MTK_MUSB_MAX_EP_NUM		8
 #define MTK_MUSB_RAM_BITS		16

 static struct musb_fifo_cfg mtk_musb_mode_cfg[] = {
 	MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
 	MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
 	MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
 	MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
 	MUSB_EP_FIFO_SINGLE(5, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
 	MUSB_EP_FIFO_SINGLE(6, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(6, FIFO_RX, 512),
 	MUSB_EP_FIFO_SINGLE(7, FIFO_TX, 512),
 	MUSB_EP_FIFO_SINGLE(7, FIFO_RX, 512),
 };

 static struct musb_hdrc_config musb_config = {
 	.fifo_cfg       = mtk_musb_mode_cfg,
 	.fifo_cfg_size  = ARRAY_SIZE(mtk_musb_mode_cfg),
 	.multipoint	= true,
 	.dyn_fifo	= true,
 	.num_eps	= MTK_MUSB_MAX_EP_NUM,
 	.ram_bits	= MTK_MUSB_RAM_BITS,
 };

 static int musb_usb_probe(struct udevice *dev)
 {
 	struct mtk_musb_glue *glue = dev_get_priv(dev);
 	struct musb_host_data *host = &glue->mdata;
 	struct musb_hdrc_platform_data pdata;
 	void *base = dev_read_addr_ptr(dev);
 	int ret;

 	DBG_I("%s():\n", __func__);

 #ifdef CONFIG_USB_MUSB_HOST
 	struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
 #endif

 	if (!base)
 		return -EINVAL;

 	glue->cfg = (struct mtk_musb_config *)dev_get_driver_data(dev);
 	if (!glue->cfg)
 		return -EINVAL;

 	ret = clk_get_by_name(dev, "usbpll", &glue->usbpllclk);
 	if (ret) {
 		dev_err(dev, "failed to get usbpll clock\n");
 		return ret;
 	}
 	ret = clk_get_by_name(dev, "usbmcu", &glue->usbmcuclk);
 	if (ret) {
 		dev_err(dev, "failed to get usbmcu clock\n");
 		return ret;
 	}
 	ret = clk_get_by_name(dev, "usb", &glue->usbclk);
 	if (ret) {
 		dev_err(dev, "failed to get usb clock\n");
 		return ret;
 	}

 	memset(&pdata, 0, sizeof(pdata));
 	pdata.power = (u8)400;
 	pdata.platform_ops = &mtk_musb_ops;
 	pdata.config = glue->cfg->config;

 #ifdef CONFIG_USB_MUSB_HOST
 	priv->desc_before_addr = true;

 	pdata.mode = MUSB_HOST;
 	host->host = musb_init_controller(&pdata, &glue->dev, base);
 	if (!host->host)
 		return -EIO;

 	ret = musb_lowlevel_init(host);
 	if (!ret)
 		printf("MTK MUSB OTG (Host)\n");
 #else
 	pdata.mode = MUSB_PERIPHERAL;
 	host->host = musb_register(&pdata, &glue->dev, base);
 	if (!host->host)
 		return -EIO;

 	printf("MTK MUSB OTG (Peripheral)\n");
 #endif

 	mt_usb_phy_poweron();

 	return ret;
 }

 static int musb_usb_remove(struct udevice *dev)
 {
 	struct mtk_musb_glue *glue = dev_get_priv(dev);
 	struct musb_host_data *host = &glue->mdata;

 	musb_stop(host->host);
 	free(host->host);
 	host->host = NULL;

 	return 0;
 }

 static const struct mtk_musb_config mt8518_cfg = {
 	.config = &musb_config,
 };

 static const struct udevice_id mtk_musb_ids[] = {
 	{ .compatible = "mediatek,mt8518-musb",
 	  .data = (ulong)&mt8518_cfg },
 	{ }
 };

 U_BOOT_DRIVER(mtk_musb) = {
 	.name		= "mtk_musb",
 #ifdef CONFIG_USB_MUSB_HOST
 	.id		= UCLASS_USB,
 #else
 	.id		= UCLASS_USB_GADGET_GENERIC,
 #endif
 	.of_match	= mtk_musb_ids,
 	.probe		= musb_usb_probe,
 	.remove		= musb_usb_remove,
 #ifdef CONFIG_USB_MUSB_HOST
 	.ops		= &musb_usb_ops,
 #endif
 	.plat_auto	= sizeof(struct usb_plat),
 	.priv_auto	= sizeof(struct mtk_musb_glue),
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Mediatek "glue layer"
	*
	* Copyright (C) 2019-2021 by Mediatek
	* Based on the AllWinner SUNXI "glue layer" code.
	* Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
	* Copyright (C) 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
	*
	* This file is part of the Inventra Controller Driver for Linux.
	*/
	#include <common.h>
	#include <clk.h>
	#include <dm.h>
	#include <dm/device_compat.h>
	#include <dm/lists.h>
	#include <dm/root.h>
	#include <linux/delay.h>
	#include <linux/printk.h>
	#include <linux/usb/musb.h>
	#include <usb.h>
	#include "linux-compat.h"
	#include "musb_core.h"
	#include "musb_uboot.h"

	#define DBG_I(fmt, ...) \
	pr_info(fmt, ##__VA_ARGS__)

	struct mtk_musb_config {
	struct musb_hdrc_config *config;
	};

	struct mtk_musb_glue {
	struct musb_host_data mdata;
	struct clk usbpllclk;
	struct clk usbmcuclk;
	struct clk usbclk;
	struct mtk_musb_config *cfg;
	struct device dev;
	};

	#define to_mtk_musb_glue(d) container_of(d, struct mtk_musb_glue, dev)

	/******************************************************************************
	* phy settings
	******************************************************************************/
	#define USB20_PHY_BASE 0x11110800
	#define USBPHY_READ8(offset) \
	readb((void *)(USB20_PHY_BASE + (offset)))
	#define USBPHY_WRITE8(offset, value) \
	writeb(value, (void *)(USB20_PHY_BASE + (offset)))
	#define USBPHY_SET8(offset, mask) \
	USBPHY_WRITE8(offset, (USBPHY_READ8(offset)) \| (mask))
	#define USBPHY_CLR8(offset, mask) \
	USBPHY_WRITE8(offset, (USBPHY_READ8(offset)) & (~(mask)))

	static void mt_usb_phy_poweron(void)
	{
	/*
	* switch to USB function.
	* (system register, force ip into usb mode).
	*/
	USBPHY_CLR8(0x6b, 0x04);
	USBPHY_CLR8(0x6e, 0x01);
	USBPHY_CLR8(0x21, 0x03);

	/* RG_USB20_BC11_SW_EN = 1'b0 */
	USBPHY_SET8(0x22, 0x04);
	USBPHY_CLR8(0x1a, 0x80);

	/* RG_USB20_DP_100K_EN = 1'b0 */
	/* RG_USB20_DP_100K_EN = 1'b0 */
	USBPHY_CLR8(0x22, 0x03);

	/OTG enable/
	USBPHY_SET8(0x20, 0x10);
	/* release force suspendm */
	USBPHY_CLR8(0x6a, 0x04);

	mdelay(800);

	/* force enter device mode */
	USBPHY_CLR8(0x6c, 0x10);
	USBPHY_SET8(0x6c, 0x2E);
	USBPHY_SET8(0x6d, 0x3E);
	}

	static void mt_usb_phy_savecurrent(void)
	{
	/*
	* switch to USB function.
	* (system register, force ip into usb mode).
	*/
	USBPHY_CLR8(0x6b, 0x04);
	USBPHY_CLR8(0x6e, 0x01);
	USBPHY_CLR8(0x21, 0x03);

	/* release force suspendm */
	USBPHY_CLR8(0x6a, 0x04);
	USBPHY_SET8(0x68, 0x04);
	/* RG_DPPULLDOWN./RG_DMPULLDOWN. */
	USBPHY_SET8(0x68, 0xc0);
	/* RG_XCVRSEL[1:0] = 2'b01 */
	USBPHY_CLR8(0x68, 0x30);
	USBPHY_SET8(0x68, 0x10);
	/* RG_TERMSEL = 1'b1 */
	USBPHY_SET8(0x68, 0x04);
	/* RG_DATAIN[3:0] = 4'b0000 */
	USBPHY_CLR8(0x69, 0x3c);

	/*
	* force_dp_pulldown, force_dm_pulldown,
	* force_xcversel, force_termsel.
	*/
	USBPHY_SET8(0x6a, 0xba);

	/* RG_USB20_BC11_SW_EN = 1'b0 */
	USBPHY_CLR8(0x1a, 0x80);
	/* RG_USB20_OTG_VBUSSCMP_EN = 1'b0 */
	USBPHY_CLR8(0x1a, 0x10);

	mdelay(800);

	USBPHY_CLR8(0x6a, 0x04);
	/* rg_usb20_pll_stable = 1 */
	//USBPHY_SET8(0x63, 0x02);

	mdelay(1);

	/* force suspendm = 1 */
	//USBPHY_SET8(0x6a, 0x04);
	}

	static void mt_usb_phy_recover(void)
	{
	/* clean PUPD_BIST_EN */
	/* PUPD_BIST_EN = 1'b0 */
	/* PMIC will use it to detect charger type */
	USBPHY_CLR8(0x1d, 0x10);

	/* force_uart_en = 1'b0 */
	USBPHY_CLR8(0x6b, 0x04);
	/* RG_UART_EN = 1'b0 */
	USBPHY_CLR8(0x6e, 0x01);
	/* force_uart_en = 1'b0 */
	USBPHY_CLR8(0x6a, 0x04);

	USBPHY_CLR8(0x21, 0x03);
	USBPHY_CLR8(0x68, 0xf4);

	/* RG_DATAIN[3:0] = 4'b0000 */
	USBPHY_CLR8(0x69, 0x3c);

	USBPHY_CLR8(0x6a, 0xba);

	/* RG_USB20_BC11_SW_EN = 1'b0 */
	USBPHY_CLR8(0x1a, 0x80);
	/* RG_USB20_OTG_VBUSSCMP_EN = 1'b1 */
	USBPHY_SET8(0x1a, 0x10);

	//HQA adjustment
	USBPHY_CLR8(0x18, 0x08);
	USBPHY_SET8(0x18, 0x06);
	mdelay(800);

	/* force enter device mode */
	//USBPHY_CLR8(0x6c, 0x10);
	//USBPHY_SET8(0x6c, 0x2E);
	//USBPHY_SET8(0x6d, 0x3E);

	/* enable VRT internal R architecture */
	/* RG_USB20_INTR_EN = 1'b1 */
	USBPHY_SET8(0x00, 0x20);
	}

	/******************************************************************************
	* MUSB Glue code
	******************************************************************************/

	static irqreturn_t mtk_musb_interrupt(int irq, void *__hci)
	{
	struct musb *musb = __hci;
	irqreturn_t retval = IRQ_NONE;

	/* read and flush interrupts */
	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	// last_int_usb = musb->int_usb;
	if (musb->int_usb)
	musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	if (musb->int_tx)
	musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
	if (musb->int_rx)
	musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);

	if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx)
	retval \|= musb_interrupt(musb);

	return retval;
	}

	/* musb_core does not call enable / disable in a balanced manner <sigh> */
	static bool enabled;

	static int mtk_musb_enable(struct musb *musb)
	{
	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);

	DBG_I("%s():\n", __func__);

	musb_ep_select(musb->mregs, 0);
	musb_writeb(musb->mregs, MUSB_FADDR, 0);

	if (enabled)
	return 0;

	mt_usb_phy_recover();

	enabled = true;

	return 0;
	}

	static void mtk_musb_disable(struct musb *musb)
	{
	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
	int ret;

	DBG_I("%s():\n", __func__);

	if (!enabled)
	return;

	mt_usb_phy_savecurrent();

	enabled = false;
	}

	static int mtk_musb_init(struct musb *musb)
	{
	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
	int ret;

	DBG_I("%s():\n", __func__);

	ret = clk_enable(&glue->usbpllclk);
	if (ret) {
	dev_err(musb->controller, "failed to enable usbpll clock\n");
	return ret;
	}
	ret = clk_enable(&glue->usbmcuclk);
	if (ret) {
	dev_err(musb->controller, "failed to enable usbmcu clock\n");
	return ret;
	}
	ret = clk_enable(&glue->usbclk);
	if (ret) {
	dev_err(musb->controller, "failed to enable usb clock\n");
	return ret;
	}

	musb->isr = mtk_musb_interrupt;

	return 0;
	}

	static int mtk_musb_exit(struct musb *musb)
	{
	struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);

	clk_disable(&glue->usbclk);
	clk_disable(&glue->usbmcuclk);
	clk_disable(&glue->usbpllclk);

	return 0;
	}

	static const struct musb_platform_ops mtk_musb_ops = {
	.init = mtk_musb_init,
	.exit = mtk_musb_exit,
	.enable = mtk_musb_enable,
	.disable = mtk_musb_disable,
	};

	/* MTK OTG supports up to 7 endpoints */
	#define MTK_MUSB_MAX_EP_NUM 8
	#define MTK_MUSB_RAM_BITS 16

	static struct musb_fifo_cfg mtk_musb_mode_cfg[] = {
	MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
	MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
	MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
	MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
	MUSB_EP_FIFO_SINGLE(5, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
	MUSB_EP_FIFO_SINGLE(6, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(6, FIFO_RX, 512),
	MUSB_EP_FIFO_SINGLE(7, FIFO_TX, 512),
	MUSB_EP_FIFO_SINGLE(7, FIFO_RX, 512),
	};

	static struct musb_hdrc_config musb_config = {
	.fifo_cfg = mtk_musb_mode_cfg,
	.fifo_cfg_size = ARRAY_SIZE(mtk_musb_mode_cfg),
	.multipoint = true,
	.dyn_fifo = true,
	.num_eps = MTK_MUSB_MAX_EP_NUM,
	.ram_bits = MTK_MUSB_RAM_BITS,
	};

	static int musb_usb_probe(struct udevice *dev)
	{
	struct mtk_musb_glue *glue = dev_get_priv(dev);
	struct musb_host_data *host = &glue->mdata;
	struct musb_hdrc_platform_data pdata;
	void *base = dev_read_addr_ptr(dev);
	int ret;

	DBG_I("%s():\n", __func__);

	#ifdef CONFIG_USB_MUSB_HOST
	struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
	#endif

	if (!base)
	return -EINVAL;

	glue->cfg = (struct mtk_musb_config *)dev_get_driver_data(dev);
	if (!glue->cfg)
	return -EINVAL;

	ret = clk_get_by_name(dev, "usbpll", &glue->usbpllclk);
	if (ret) {
	dev_err(dev, "failed to get usbpll clock\n");
	return ret;
	}
	ret = clk_get_by_name(dev, "usbmcu", &glue->usbmcuclk);
	if (ret) {
	dev_err(dev, "failed to get usbmcu clock\n");
	return ret;
	}
	ret = clk_get_by_name(dev, "usb", &glue->usbclk);
	if (ret) {
	dev_err(dev, "failed to get usb clock\n");
	return ret;
	}

	memset(&pdata, 0, sizeof(pdata));
	pdata.power = (u8)400;
	pdata.platform_ops = &mtk_musb_ops;
	pdata.config = glue->cfg->config;

	#ifdef CONFIG_USB_MUSB_HOST
	priv->desc_before_addr = true;

	pdata.mode = MUSB_HOST;
	host->host = musb_init_controller(&pdata, &glue->dev, base);
	if (!host->host)
	return -EIO;

	ret = musb_lowlevel_init(host);
	if (!ret)
	printf("MTK MUSB OTG (Host)\n");
	#else
	pdata.mode = MUSB_PERIPHERAL;
	host->host = musb_register(&pdata, &glue->dev, base);
	if (!host->host)
	return -EIO;

	printf("MTK MUSB OTG (Peripheral)\n");
	#endif

	mt_usb_phy_poweron();

	return ret;
	}

	static int musb_usb_remove(struct udevice *dev)
	{
	struct mtk_musb_glue *glue = dev_get_priv(dev);
	struct musb_host_data *host = &glue->mdata;

	musb_stop(host->host);
	free(host->host);
	host->host = NULL;

	return 0;
	}

	static const struct mtk_musb_config mt8518_cfg = {
	.config = &musb_config,
	};

	static const struct udevice_id mtk_musb_ids[] = {
	{ .compatible = "mediatek,mt8518-musb",
	.data = (ulong)&mt8518_cfg },
	{ }
	};

	U_BOOT_DRIVER(mtk_musb) = {
	.name = "mtk_musb",
	#ifdef CONFIG_USB_MUSB_HOST
	.id = UCLASS_USB,
	#else
	.id = UCLASS_USB_GADGET_GENERIC,
	#endif
	.of_match = mtk_musb_ids,
	.probe = musb_usb_probe,
	.remove = musb_usb_remove,
	#ifdef CONFIG_USB_MUSB_HOST
	.ops = &musb_usb_ops,
	#endif
	.plat_auto = sizeof(struct usb_plat),
	.priv_auto = sizeof(struct mtk_musb_glue),
	};