[mirror_ubuntu-jammy-kernel.git] / drivers / usb / musb / mediatek.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2019 MediaTek Inc.
 *
 * Author:
 *  Min Guo <min.guo@mediatek.com>
 *  Yonglong Wu <yonglong.wu@mediatek.com>
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/usb/role.h>
#include <linux/usb/usb_phy_generic.h>
#include "musb_core.h"
#include "musb_dma.h"

#define USB_L1INTS		0x00a0
#define USB_L1INTM		0x00a4
#define MTK_MUSB_TXFUNCADDR	0x0480

/* MediaTek controller toggle enable and status reg */
#define MUSB_RXTOG		0x80
#define MUSB_RXTOGEN		0x82
#define MUSB_TXTOG		0x84
#define MUSB_TXTOGEN		0x86
#define MTK_TOGGLE_EN		GENMASK(15, 0)

#define TX_INT_STATUS		BIT(0)
#define RX_INT_STATUS		BIT(1)
#define USBCOM_INT_STATUS	BIT(2)
#define DMA_INT_STATUS		BIT(3)

#define DMA_INTR_STATUS_MSK	GENMASK(7, 0)
#define DMA_INTR_UNMASK_SET_MSK	GENMASK(31, 24)

struct mtk_glue {
	struct device *dev;
	struct musb *musb;
	struct platform_device *musb_pdev;
	struct platform_device *usb_phy;
	struct phy *phy;
	struct usb_phy *xceiv;
	enum phy_mode phy_mode;
	struct clk *main;
	struct clk *mcu;
	struct clk *univpll;
	enum usb_role role;
	struct usb_role_switch *role_sw;
};

static int mtk_musb_clks_get(struct mtk_glue *glue)
{
	struct device *dev = glue->dev;

	glue->main = devm_clk_get(dev, "main");
	if (IS_ERR(glue->main)) {
		dev_err(dev, "fail to get main clock\n");
		return PTR_ERR(glue->main);
	}

	glue->mcu = devm_clk_get(dev, "mcu");
	if (IS_ERR(glue->mcu)) {
		dev_err(dev, "fail to get mcu clock\n");
		return PTR_ERR(glue->mcu);
	}

	glue->univpll = devm_clk_get(dev, "univpll");
	if (IS_ERR(glue->univpll)) {
		dev_err(dev, "fail to get univpll clock\n");
		return PTR_ERR(glue->univpll);
	}

	return 0;
}

static int mtk_musb_clks_enable(struct mtk_glue *glue)
{
	int ret;

	ret = clk_prepare_enable(glue->main);
	if (ret) {
		dev_err(glue->dev, "failed to enable main clock\n");
		goto err_main_clk;
	}

	ret = clk_prepare_enable(glue->mcu);
	if (ret) {
		dev_err(glue->dev, "failed to enable mcu clock\n");
		goto err_mcu_clk;
	}

	ret = clk_prepare_enable(glue->univpll);
	if (ret) {
		dev_err(glue->dev, "failed to enable univpll clock\n");
		goto err_univpll_clk;
	}

	return 0;

err_univpll_clk:
	clk_disable_unprepare(glue->mcu);
err_mcu_clk:
	clk_disable_unprepare(glue->main);
err_main_clk:
	return ret;
}

static void mtk_musb_clks_disable(struct mtk_glue *glue)
{
	clk_disable_unprepare(glue->univpll);
	clk_disable_unprepare(glue->mcu);
	clk_disable_unprepare(glue->main);
}

static int mtk_otg_switch_set(struct mtk_glue *glue, enum usb_role role)
{
	struct musb *musb = glue->musb;
	u8 devctl = readb(musb->mregs + MUSB_DEVCTL);
	enum usb_role new_role;

	if (role == glue->role)
		return 0;

	switch (role) {
	case USB_ROLE_HOST:
		musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
		glue->phy_mode = PHY_MODE_USB_HOST;
		new_role = USB_ROLE_HOST;
		if (glue->role == USB_ROLE_NONE)
			phy_power_on(glue->phy);

		devctl |= MUSB_DEVCTL_SESSION;
		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
		MUSB_HST_MODE(musb);
		break;
	case USB_ROLE_DEVICE:
		musb->xceiv->otg->state = OTG_STATE_B_IDLE;
		glue->phy_mode = PHY_MODE_USB_DEVICE;
		new_role = USB_ROLE_DEVICE;
		devctl &= ~MUSB_DEVCTL_SESSION;
		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
		if (glue->role == USB_ROLE_NONE)
			phy_power_on(glue->phy);

		MUSB_DEV_MODE(musb);
		break;
	case USB_ROLE_NONE:
		glue->phy_mode = PHY_MODE_USB_OTG;
		new_role = USB_ROLE_NONE;
		devctl &= ~MUSB_DEVCTL_SESSION;
		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
		if (glue->role != USB_ROLE_NONE)
			phy_power_off(glue->phy);

		break;
	default:
		dev_err(glue->dev, "Invalid State\n");
		return -EINVAL;
	}

	glue->role = new_role;
	phy_set_mode(glue->phy, glue->phy_mode);

	return 0;
}

static int musb_usb_role_sx_set(struct usb_role_switch *sw, enum usb_role role)
{
	return mtk_otg_switch_set(usb_role_switch_get_drvdata(sw), role);
}

static enum usb_role musb_usb_role_sx_get(struct usb_role_switch *sw)
{
	struct mtk_glue *glue = usb_role_switch_get_drvdata(sw);

	return glue->role;
}

static int mtk_otg_switch_init(struct mtk_glue *glue)
{
	struct usb_role_switch_desc role_sx_desc = { 0 };

	role_sx_desc.set = musb_usb_role_sx_set;
	role_sx_desc.get = musb_usb_role_sx_get;
	role_sx_desc.fwnode = dev_fwnode(glue->dev);
	role_sx_desc.driver_data = glue;
	glue->role_sw = usb_role_switch_register(glue->dev, &role_sx_desc);

	return PTR_ERR_OR_ZERO(glue->role_sw);
}

static void mtk_otg_switch_exit(struct mtk_glue *glue)
{
	return usb_role_switch_unregister(glue->role_sw);
}

static irqreturn_t generic_interrupt(int irq, void *__hci)
{
	unsigned long flags;
	irqreturn_t retval = IRQ_NONE;
	struct musb *musb = __hci;

	spin_lock_irqsave(&musb->lock, flags);
	musb->int_usb = musb_clearb(musb->mregs, MUSB_INTRUSB);
	musb->int_rx = musb_clearw(musb->mregs, MUSB_INTRRX);
	musb->int_tx = musb_clearw(musb->mregs, MUSB_INTRTX);

	if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) {
		/* ep0 FADDR must be 0 when (re)entering peripheral mode */
		musb_ep_select(musb->mregs, 0);
		musb_writeb(musb->mregs, MUSB_FADDR, 0);
	}

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

	spin_unlock_irqrestore(&musb->lock, flags);

	return retval;
}

static irqreturn_t mtk_musb_interrupt(int irq, void *dev_id)
{
	irqreturn_t retval = IRQ_NONE;
	struct musb *musb = (struct musb *)dev_id;
	u32 l1_ints;

	l1_ints = musb_readl(musb->mregs, USB_L1INTS) &
			musb_readl(musb->mregs, USB_L1INTM);

	if (l1_ints & (TX_INT_STATUS | RX_INT_STATUS | USBCOM_INT_STATUS))
		retval = generic_interrupt(irq, musb);

#if defined(CONFIG_USB_INVENTRA_DMA)
	if (l1_ints & DMA_INT_STATUS)
		retval = dma_controller_irq(irq, musb->dma_controller);
#endif
	return retval;
}

static u32 mtk_musb_busctl_offset(u8 epnum, u16 offset)
{
	return MTK_MUSB_TXFUNCADDR + offset + 8 * epnum;
}

static u8 mtk_musb_clearb(void __iomem *addr, unsigned int offset)
{
	u8 data;

	/* W1C */
	data = musb_readb(addr, offset);
	musb_writeb(addr, offset, data);
	return data;
}

static u16 mtk_musb_clearw(void __iomem *addr, unsigned int offset)
{
	u16 data;

	/* W1C */
	data = musb_readw(addr, offset);
	musb_writew(addr, offset, data);
	return data;
}

static int mtk_musb_set_mode(struct musb *musb, u8 mode)
{
	struct device *dev = musb->controller;
	struct mtk_glue *glue = dev_get_drvdata(dev->parent);
	enum phy_mode new_mode;
	enum usb_role new_role;

	switch (mode) {
	case MUSB_HOST:
		new_mode = PHY_MODE_USB_HOST;
		new_role = USB_ROLE_HOST;
		break;
	case MUSB_PERIPHERAL:
		new_mode = PHY_MODE_USB_DEVICE;
		new_role = USB_ROLE_DEVICE;
		break;
	case MUSB_OTG:
		new_mode = PHY_MODE_USB_OTG;
		new_role = USB_ROLE_NONE;
		break;
	default:
		dev_err(glue->dev, "Invalid mode request\n");
		return -EINVAL;
	}

	if (glue->phy_mode == new_mode)
		return 0;

	if (musb->port_mode != MUSB_OTG) {
		dev_err(glue->dev, "Does not support changing modes\n");
		return -EINVAL;
	}

	mtk_otg_switch_set(glue, new_role);
	return 0;
}

static int mtk_musb_init(struct musb *musb)
{
	struct device *dev = musb->controller;
	struct mtk_glue *glue = dev_get_drvdata(dev->parent);
	int ret;

	glue->musb = musb;
	musb->phy = glue->phy;
	musb->xceiv = glue->xceiv;
	musb->is_host = false;
	musb->isr = mtk_musb_interrupt;

	/* Set TX/RX toggle enable */
	musb_writew(musb->mregs, MUSB_TXTOGEN, MTK_TOGGLE_EN);
	musb_writew(musb->mregs, MUSB_RXTOGEN, MTK_TOGGLE_EN);

	if (musb->port_mode == MUSB_OTG) {
		ret = mtk_otg_switch_init(glue);
		if (ret)
			return ret;
	}

	ret = phy_init(glue->phy);
	if (ret)
		goto err_phy_init;

	ret = phy_power_on(glue->phy);
	if (ret)
		goto err_phy_power_on;

	phy_set_mode(glue->phy, glue->phy_mode);

#if defined(CONFIG_USB_INVENTRA_DMA)
	musb_writel(musb->mregs, MUSB_HSDMA_INTR,
		    DMA_INTR_STATUS_MSK | DMA_INTR_UNMASK_SET_MSK);
#endif
	musb_writel(musb->mregs, USB_L1INTM, TX_INT_STATUS | RX_INT_STATUS |
		    USBCOM_INT_STATUS | DMA_INT_STATUS);
	return 0;

err_phy_power_on:
	phy_exit(glue->phy);
err_phy_init:
	mtk_otg_switch_exit(glue);
	return ret;
}

static u16 mtk_musb_get_toggle(struct musb_qh *qh, int is_out)
{
	struct musb *musb = qh->hw_ep->musb;
	u8 epnum = qh->hw_ep->epnum;
	u16 toggle;

	toggle = musb_readw(musb->mregs, is_out ? MUSB_TXTOG : MUSB_RXTOG);
	return toggle & (1 << epnum);
}

static u16 mtk_musb_set_toggle(struct musb_qh *qh, int is_out, struct urb *urb)
{
	struct musb *musb = qh->hw_ep->musb;
	u8 epnum = qh->hw_ep->epnum;
	u16 value, toggle;

	toggle = usb_gettoggle(urb->dev, qh->epnum, is_out);

	if (is_out) {
		value = musb_readw(musb->mregs, MUSB_TXTOG);
		value |= toggle << epnum;
		musb_writew(musb->mregs, MUSB_TXTOG, value);
	} else {
		value = musb_readw(musb->mregs, MUSB_RXTOG);
		value |= toggle << epnum;
		musb_writew(musb->mregs, MUSB_RXTOG, value);
	}

	return 0;
}

static int mtk_musb_exit(struct musb *musb)
{
	struct device *dev = musb->controller;
	struct mtk_glue *glue = dev_get_drvdata(dev->parent);

	mtk_otg_switch_exit(glue);
	phy_power_off(glue->phy);
	phy_exit(glue->phy);
	mtk_musb_clks_disable(glue);

	pm_runtime_put_sync(dev);
	pm_runtime_disable(dev);
	return 0;
}

static const struct musb_platform_ops mtk_musb_ops = {
	.quirks = MUSB_DMA_INVENTRA,
	.init = mtk_musb_init,
	.get_toggle = mtk_musb_get_toggle,
	.set_toggle = mtk_musb_set_toggle,
	.exit = mtk_musb_exit,
#ifdef CONFIG_USB_INVENTRA_DMA
	.dma_init = musbhs_dma_controller_create_noirq,
	.dma_exit = musbhs_dma_controller_destroy,
#endif
	.clearb = mtk_musb_clearb,
	.clearw = mtk_musb_clearw,
	.busctl_offset = mtk_musb_busctl_offset,
	.set_mode = mtk_musb_set_mode,
};

#define MTK_MUSB_MAX_EP_NUM	8
#define MTK_MUSB_RAM_BITS	11

static struct musb_fifo_cfg mtk_musb_mode_cfg[] = {
	{ .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
	{ .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
	{ .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
	{ .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
	{ .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
	{ .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
	{ .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
	{ .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
	{ .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
	{ .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
	{ .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 1024, },
	{ .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 1024, },
	{ .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
	{ .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 64, },
};

static const struct musb_hdrc_config mtk_musb_hdrc_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 const struct platform_device_info mtk_dev_info = {
	.name = "musb-hdrc",
	.id = PLATFORM_DEVID_AUTO,
	.dma_mask = DMA_BIT_MASK(32),
};

static int mtk_musb_probe(struct platform_device *pdev)
{
	struct musb_hdrc_platform_data *pdata;
	struct mtk_glue *glue;
	struct platform_device_info pinfo;
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	int ret;

	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
	if (!glue)
		return -ENOMEM;

	glue->dev = dev;
	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	ret = of_platform_populate(np, NULL, NULL, dev);
	if (ret) {
		dev_err(dev, "failed to create child devices at %p\n", np);
		return ret;
	}

	ret = mtk_musb_clks_get(glue);
	if (ret)
		return ret;

	pdata->config = &mtk_musb_hdrc_config;
	pdata->platform_ops = &mtk_musb_ops;
	pdata->mode = usb_get_dr_mode(dev);

	if (IS_ENABLED(CONFIG_USB_MUSB_HOST))
		pdata->mode = USB_DR_MODE_HOST;
	else if (IS_ENABLED(CONFIG_USB_MUSB_GADGET))
		pdata->mode = USB_DR_MODE_PERIPHERAL;

	switch (pdata->mode) {
	case USB_DR_MODE_HOST:
		glue->phy_mode = PHY_MODE_USB_HOST;
		glue->role = USB_ROLE_HOST;
		break;
	case USB_DR_MODE_PERIPHERAL:
		glue->phy_mode = PHY_MODE_USB_DEVICE;
		glue->role = USB_ROLE_DEVICE;
		break;
	case USB_DR_MODE_OTG:
		glue->phy_mode = PHY_MODE_USB_OTG;
		glue->role = USB_ROLE_NONE;
		break;
	default:
		dev_err(&pdev->dev, "Error 'dr_mode' property\n");
		return -EINVAL;
	}

	glue->phy = devm_of_phy_get_by_index(dev, np, 0);
	if (IS_ERR(glue->phy)) {
		dev_err(dev, "fail to getting phy %ld\n",
			PTR_ERR(glue->phy));
		return PTR_ERR(glue->phy);
	}

	glue->usb_phy = usb_phy_generic_register();
	if (IS_ERR(glue->usb_phy)) {
		dev_err(dev, "fail to registering usb-phy %ld\n",
			PTR_ERR(glue->usb_phy));
		return PTR_ERR(glue->usb_phy);
	}

	glue->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	if (IS_ERR(glue->xceiv)) {
		dev_err(dev, "fail to getting usb-phy %d\n", ret);
		ret = PTR_ERR(glue->xceiv);
		goto err_unregister_usb_phy;
	}

	platform_set_drvdata(pdev, glue);
	pm_runtime_enable(dev);
	pm_runtime_get_sync(dev);

	ret = mtk_musb_clks_enable(glue);
	if (ret)
		goto err_enable_clk;

	pinfo = mtk_dev_info;
	pinfo.parent = dev;
	pinfo.res = pdev->resource;
	pinfo.num_res = pdev->num_resources;
	pinfo.data = pdata;
	pinfo.size_data = sizeof(*pdata);

	glue->musb_pdev = platform_device_register_full(&pinfo);
	if (IS_ERR(glue->musb_pdev)) {
		ret = PTR_ERR(glue->musb_pdev);
		dev_err(dev, "failed to register musb device: %d\n", ret);
		goto err_device_register;
	}

	return 0;

err_device_register:
	mtk_musb_clks_disable(glue);
err_enable_clk:
	pm_runtime_put_sync(dev);
	pm_runtime_disable(dev);
err_unregister_usb_phy:
	usb_phy_generic_unregister(glue->usb_phy);
	return ret;
}

static int mtk_musb_remove(struct platform_device *pdev)
{
	struct mtk_glue *glue = platform_get_drvdata(pdev);
	struct platform_device *usb_phy = glue->usb_phy;

	platform_device_unregister(glue->musb_pdev);
	usb_phy_generic_unregister(usb_phy);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id mtk_musb_match[] = {
	{.compatible = "mediatek,mtk-musb",},
	{},
};
MODULE_DEVICE_TABLE(of, mtk_musb_match);
#endif

static struct platform_driver mtk_musb_driver = {
	.probe = mtk_musb_probe,
	.remove = mtk_musb_remove,
	.driver = {
		   .name = "musb-mtk",
		   .of_match_table = of_match_ptr(mtk_musb_match),
	},
};

module_platform_driver(mtk_musb_driver);

MODULE_DESCRIPTION("MediaTek MUSB Glue Layer");
MODULE_AUTHOR("Min Guo <min.guo@mediatek.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
0990366b MG	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (C) 2019 MediaTek Inc.
	4	*
	5	* Author:
	6	* Min Guo <min.guo@mediatek.com>
	7	* Yonglong Wu <yonglong.wu@mediatek.com>
	8	*/
	9
	10	#include <linux/clk.h>
	11	#include <linux/dma-mapping.h>
	12	#include <linux/module.h>
	13	#include <linux/of_platform.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/usb/role.h>
	16	#include <linux/usb/usb_phy_generic.h>
	17	#include "musb_core.h"
	18	#include "musb_dma.h"
	19
	20	#define USB_L1INTS 0x00a0
	21	#define USB_L1INTM 0x00a4
	22	#define MTK_MUSB_TXFUNCADDR 0x0480
	23
	24	/* MediaTek controller toggle enable and status reg */
	25	#define MUSB_RXTOG 0x80
	26	#define MUSB_RXTOGEN 0x82
	27	#define MUSB_TXTOG 0x84
	28	#define MUSB_TXTOGEN 0x86
	29	#define MTK_TOGGLE_EN GENMASK(15, 0)
	30
	31	#define TX_INT_STATUS BIT(0)
	32	#define RX_INT_STATUS BIT(1)
	33	#define USBCOM_INT_STATUS BIT(2)
	34	#define DMA_INT_STATUS BIT(3)
	35
	36	#define DMA_INTR_STATUS_MSK GENMASK(7, 0)
	37	#define DMA_INTR_UNMASK_SET_MSK GENMASK(31, 24)
	38
	39	struct mtk_glue {
	40	struct device *dev;
	41	struct musb *musb;
	42	struct platform_device *musb_pdev;
	43	struct platform_device *usb_phy;
	44	struct phy *phy;
	45	struct usb_phy *xceiv;
	46	enum phy_mode phy_mode;
	47	struct clk *main;
	48	struct clk *mcu;
	49	struct clk *univpll;
	50	enum usb_role role;
	51	struct usb_role_switch *role_sw;
	52	};
	53
	54	static int mtk_musb_clks_get(struct mtk_glue *glue)
	55	{
	56	struct device *dev = glue->dev;
	57
	58	glue->main = devm_clk_get(dev, "main");
	59	if (IS_ERR(glue->main)) {
	60	dev_err(dev, "fail to get main clock\n");
	61	return PTR_ERR(glue->main);
	62	}
	63
	64	glue->mcu = devm_clk_get(dev, "mcu");
65	if (IS_ERR(glue->mcu)) {
66	dev_err(dev, "fail to get mcu clock\n");
67	return PTR_ERR(glue->mcu);
68	}
69
70	glue->univpll = devm_clk_get(dev, "univpll");
71	if (IS_ERR(glue->univpll)) {
72	dev_err(dev, "fail to get univpll clock\n");
73	return PTR_ERR(glue->univpll);
74	}
75
76	return 0;
77	}
78
79	static int mtk_musb_clks_enable(struct mtk_glue *glue)
80	{
81	int ret;
82
83	ret = clk_prepare_enable(glue->main);
84	if (ret) {
85	dev_err(glue->dev, "failed to enable main clock\n");
86	goto err_main_clk;
87	}
88
89	ret = clk_prepare_enable(glue->mcu);
90	if (ret) {
91	dev_err(glue->dev, "failed to enable mcu clock\n");
92	goto err_mcu_clk;
93	}
94
95	ret = clk_prepare_enable(glue->univpll);
96	if (ret) {
97	dev_err(glue->dev, "failed to enable univpll clock\n");
98	goto err_univpll_clk;
99	}
100
101	return 0;
102
103	err_univpll_clk:
104	clk_disable_unprepare(glue->mcu);
105	err_mcu_clk:
106	clk_disable_unprepare(glue->main);
107	err_main_clk:
108	return ret;
109	}
110
111	static void mtk_musb_clks_disable(struct mtk_glue *glue)
112	{
113	clk_disable_unprepare(glue->univpll);
114	clk_disable_unprepare(glue->mcu);
115	clk_disable_unprepare(glue->main);
116	}
117
bce3052f	118	static int mtk_otg_switch_set(struct mtk_glue *glue, enum usb_role role)
0990366b	119	{
0990366b MG	120	struct musb *musb = glue->musb;
	121	u8 devctl = readb(musb->mregs + MUSB_DEVCTL);
	122	enum usb_role new_role;
	123
	124	if (role == glue->role)
	125	return 0;
	126
	127	switch (role) {
	128	case USB_ROLE_HOST:
	129	musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
	130	glue->phy_mode = PHY_MODE_USB_HOST;
	131	new_role = USB_ROLE_HOST;
	132	if (glue->role == USB_ROLE_NONE)
	133	phy_power_on(glue->phy);
	134
	135	devctl \|= MUSB_DEVCTL_SESSION;
	136	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	137	MUSB_HST_MODE(musb);
	138	break;
	139	case USB_ROLE_DEVICE:
	140	musb->xceiv->otg->state = OTG_STATE_B_IDLE;
	141	glue->phy_mode = PHY_MODE_USB_DEVICE;
	142	new_role = USB_ROLE_DEVICE;
	143	devctl &= ~MUSB_DEVCTL_SESSION;
	144	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	145	if (glue->role == USB_ROLE_NONE)
	146	phy_power_on(glue->phy);
	147
	148	MUSB_DEV_MODE(musb);
	149	break;
	150	case USB_ROLE_NONE:
	151	glue->phy_mode = PHY_MODE_USB_OTG;
	152	new_role = USB_ROLE_NONE;
	153	devctl &= ~MUSB_DEVCTL_SESSION;
	154	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	155	if (glue->role != USB_ROLE_NONE)
	156	phy_power_off(glue->phy);
	157
	158	break;
	159	default:
	160	dev_err(glue->dev, "Invalid State\n");
	161	return -EINVAL;
	162	}
	163
	164	glue->role = new_role;
	165	phy_set_mode(glue->phy, glue->phy_mode);
	166
	167	return 0;
	168	}
	169
bce3052f	170	static int musb_usb_role_sx_set(struct usb_role_switch *sw, enum usb_role role)
0990366b	171	{
bce3052f HK	172	return mtk_otg_switch_set(usb_role_switch_get_drvdata(sw), role);
	173	}
	174
	175	static enum usb_role musb_usb_role_sx_get(struct usb_role_switch *sw)
	176	{
	177	struct mtk_glue *glue = usb_role_switch_get_drvdata(sw);
0990366b MG	178
	179	return glue->role;
	180	}
	181
	182	static int mtk_otg_switch_init(struct mtk_glue *glue)
	183	{
	184	struct usb_role_switch_desc role_sx_desc = { 0 };
	185
	186	role_sx_desc.set = musb_usb_role_sx_set;
	187	role_sx_desc.get = musb_usb_role_sx_get;
	188	role_sx_desc.fwnode = dev_fwnode(glue->dev);
bce3052f	189	role_sx_desc.driver_data = glue;
0990366b MG	190	glue->role_sw = usb_role_switch_register(glue->dev, &role_sx_desc);
	191
	192	return PTR_ERR_OR_ZERO(glue->role_sw);
	193	}
	194
	195	static void mtk_otg_switch_exit(struct mtk_glue *glue)
	196	{
	197	return usb_role_switch_unregister(glue->role_sw);
	198	}
	199
	200	static irqreturn_t generic_interrupt(int irq, void *__hci)
	201	{
	202	unsigned long flags;
	203	irqreturn_t retval = IRQ_NONE;
	204	struct musb *musb = __hci;
	205
	206	spin_lock_irqsave(&musb->lock, flags);
	207	musb->int_usb = musb_clearb(musb->mregs, MUSB_INTRUSB);
	208	musb->int_rx = musb_clearw(musb->mregs, MUSB_INTRRX);
	209	musb->int_tx = musb_clearw(musb->mregs, MUSB_INTRTX);
	210
402bcac4 ML	211	if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) {
	212	/* ep0 FADDR must be 0 when (re)entering peripheral mode */
	213	musb_ep_select(musb->mregs, 0);
	214	musb_writeb(musb->mregs, MUSB_FADDR, 0);
	215	}
	216
0990366b MG	217	if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx)
	218	retval = musb_interrupt(musb);
	219
	220	spin_unlock_irqrestore(&musb->lock, flags);
	221
	222	return retval;
	223	}
	224
	225	static irqreturn_t mtk_musb_interrupt(int irq, void *dev_id)
	226	{
	227	irqreturn_t retval = IRQ_NONE;
	228	struct musb musb = (struct musb )dev_id;
	229	u32 l1_ints;
	230
	231	l1_ints = musb_readl(musb->mregs, USB_L1INTS) &
	232	musb_readl(musb->mregs, USB_L1INTM);
	233
	234	if (l1_ints & (TX_INT_STATUS \| RX_INT_STATUS \| USBCOM_INT_STATUS))
	235	retval = generic_interrupt(irq, musb);
	236
	237	#if defined(CONFIG_USB_INVENTRA_DMA)
	238	if (l1_ints & DMA_INT_STATUS)
	239	retval = dma_controller_irq(irq, musb->dma_controller);
	240	#endif
	241	return retval;
	242	}
	243
	244	static u32 mtk_musb_busctl_offset(u8 epnum, u16 offset)
	245	{
	246	return MTK_MUSB_TXFUNCADDR + offset + 8 * epnum;
	247	}
	248
	249	static u8 mtk_musb_clearb(void __iomem *addr, unsigned int offset)
	250	{
	251	u8 data;
	252
	253	/* W1C */
	254	data = musb_readb(addr, offset);
	255	musb_writeb(addr, offset, data);
	256	return data;
	257	}
	258
	259	static u16 mtk_musb_clearw(void __iomem *addr, unsigned int offset)
	260	{
	261	u16 data;
	262
	263	/* W1C */
	264	data = musb_readw(addr, offset);
	265	musb_writew(addr, offset, data);
	266	return data;
	267	}
	268
	269	static int mtk_musb_set_mode(struct musb *musb, u8 mode)
	270	{
	271	struct device *dev = musb->controller;
	272	struct mtk_glue *glue = dev_get_drvdata(dev->parent);
	273	enum phy_mode new_mode;
	274	enum usb_role new_role;
	275
	276	switch (mode) {
	277	case MUSB_HOST:
	278	new_mode = PHY_MODE_USB_HOST;
	279	new_role = USB_ROLE_HOST;
	280	break;
281	case MUSB_PERIPHERAL:
282	new_mode = PHY_MODE_USB_DEVICE;
283	new_role = USB_ROLE_DEVICE;
284	break;
285	case MUSB_OTG:
286	new_mode = PHY_MODE_USB_OTG;
287	new_role = USB_ROLE_NONE;
288	break;
289	default:
290	dev_err(glue->dev, "Invalid mode request\n");
291	return -EINVAL;
292	}
293
294	if (glue->phy_mode == new_mode)
295	return 0;
296
297	if (musb->port_mode != MUSB_OTG) {
298	dev_err(glue->dev, "Does not support changing modes\n");
299	return -EINVAL;
300	}
301
bce3052f	302	mtk_otg_switch_set(glue, new_role);
0990366b MG	303	return 0;
	304	}
	305
	306	static int mtk_musb_init(struct musb *musb)
	307	{
	308	struct device *dev = musb->controller;
	309	struct mtk_glue *glue = dev_get_drvdata(dev->parent);
	310	int ret;
	311
	312	glue->musb = musb;
	313	musb->phy = glue->phy;
	314	musb->xceiv = glue->xceiv;
	315	musb->is_host = false;
	316	musb->isr = mtk_musb_interrupt;
	317
	318	/* Set TX/RX toggle enable */
	319	musb_writew(musb->mregs, MUSB_TXTOGEN, MTK_TOGGLE_EN);
	320	musb_writew(musb->mregs, MUSB_RXTOGEN, MTK_TOGGLE_EN);
	321
	322	if (musb->port_mode == MUSB_OTG) {
	323	ret = mtk_otg_switch_init(glue);
	324	if (ret)
	325	return ret;
	326	}
	327
	328	ret = phy_init(glue->phy);
	329	if (ret)
	330	goto err_phy_init;
	331
	332	ret = phy_power_on(glue->phy);
	333	if (ret)
	334	goto err_phy_power_on;
	335
	336	phy_set_mode(glue->phy, glue->phy_mode);
	337
	338	#if defined(CONFIG_USB_INVENTRA_DMA)
	339	musb_writel(musb->mregs, MUSB_HSDMA_INTR,
	340	DMA_INTR_STATUS_MSK \| DMA_INTR_UNMASK_SET_MSK);
	341	#endif
	342	musb_writel(musb->mregs, USB_L1INTM, TX_INT_STATUS \| RX_INT_STATUS \|
	343	USBCOM_INT_STATUS \| DMA_INT_STATUS);
	344	return 0;
	345
	346	err_phy_power_on:
	347	phy_exit(glue->phy);
	348	err_phy_init:
	349	mtk_otg_switch_exit(glue);
	350	return ret;
	351	}
	352
	353	static u16 mtk_musb_get_toggle(struct musb_qh *qh, int is_out)
	354	{
	355	struct musb *musb = qh->hw_ep->musb;
	356	u8 epnum = qh->hw_ep->epnum;
	357	u16 toggle;
	358
	359	toggle = musb_readw(musb->mregs, is_out ? MUSB_TXTOG : MUSB_RXTOG);
	360	return toggle & (1 << epnum);
	361	}
	362
	363	static u16 mtk_musb_set_toggle(struct musb_qh qh, int is_out, struct urb urb)
	364	{
	365	struct musb *musb = qh->hw_ep->musb;
	366	u8 epnum = qh->hw_ep->epnum;
367	u16 value, toggle;
368
369	toggle = usb_gettoggle(urb->dev, qh->epnum, is_out);
370
371	if (is_out) {
372	value = musb_readw(musb->mregs, MUSB_TXTOG);
373	value \|= toggle << epnum;
374	musb_writew(musb->mregs, MUSB_TXTOG, value);
375	} else {
376	value = musb_readw(musb->mregs, MUSB_RXTOG);
377	value \|= toggle << epnum;
378	musb_writew(musb->mregs, MUSB_RXTOG, value);
379	}
380
381	return 0;
382	}
383
384	static int mtk_musb_exit(struct musb *musb)
385	{
386	struct device *dev = musb->controller;
387	struct mtk_glue *glue = dev_get_drvdata(dev->parent);
388
389	mtk_otg_switch_exit(glue);
390	phy_power_off(glue->phy);
391	phy_exit(glue->phy);
392	mtk_musb_clks_disable(glue);
393
394	pm_runtime_put_sync(dev);
395	pm_runtime_disable(dev);
396	return 0;
397	}
398
399	static const struct musb_platform_ops mtk_musb_ops = {
400	.quirks = MUSB_DMA_INVENTRA,
401	.init = mtk_musb_init,
402	.get_toggle = mtk_musb_get_toggle,
403	.set_toggle = mtk_musb_set_toggle,
404	.exit = mtk_musb_exit,
405	#ifdef CONFIG_USB_INVENTRA_DMA
406	.dma_init = musbhs_dma_controller_create_noirq,
407	.dma_exit = musbhs_dma_controller_destroy,
408	#endif
409	.clearb = mtk_musb_clearb,
410	.clearw = mtk_musb_clearw,
411	.busctl_offset = mtk_musb_busctl_offset,
412	.set_mode = mtk_musb_set_mode,
413	};
414
415	#define MTK_MUSB_MAX_EP_NUM 8
416	#define MTK_MUSB_RAM_BITS 11
417
418	static struct musb_fifo_cfg mtk_musb_mode_cfg[] = {
419	{ .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
420	{ .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
421	{ .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
422	{ .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
423	{ .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
424	{ .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
425	{ .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
426	{ .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
427	{ .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
428	{ .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
429	{ .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 1024, },
430	{ .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 1024, },
431	{ .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, },
432	{ .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 64, },
433	};
434
435	static const struct musb_hdrc_config mtk_musb_hdrc_config = {
436	.fifo_cfg = mtk_musb_mode_cfg,
437	.fifo_cfg_size = ARRAY_SIZE(mtk_musb_mode_cfg),
438	.multipoint = true,
439	.dyn_fifo = true,
440	.num_eps = MTK_MUSB_MAX_EP_NUM,
441	.ram_bits = MTK_MUSB_RAM_BITS,
442	};
443
444	static const struct platform_device_info mtk_dev_info = {
445	.name = "musb-hdrc",
446	.id = PLATFORM_DEVID_AUTO,
447	.dma_mask = DMA_BIT_MASK(32),
448	};
449
450	static int mtk_musb_probe(struct platform_device *pdev)
451	{
452	struct musb_hdrc_platform_data *pdata;
453	struct mtk_glue *glue;
454	struct platform_device_info pinfo;
455	struct device *dev = &pdev->dev;
456	struct device_node *np = dev->of_node;
c87c2731	457	int ret;
0990366b MG	458
	459	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
	460	if (!glue)
	461	return -ENOMEM;
	462
	463	glue->dev = dev;
	464	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	465	if (!pdata)
	466	return -ENOMEM;
	467
	468	ret = of_platform_populate(np, NULL, NULL, dev);
	469	if (ret) {
	470	dev_err(dev, "failed to create child devices at %p\n", np);
	471	return ret;
	472	}
	473
	474	ret = mtk_musb_clks_get(glue);
	475	if (ret)
	476	return ret;
	477
	478	pdata->config = &mtk_musb_hdrc_config;
	479	pdata->platform_ops = &mtk_musb_ops;
	480	pdata->mode = usb_get_dr_mode(dev);
	481
	482	if (IS_ENABLED(CONFIG_USB_MUSB_HOST))
	483	pdata->mode = USB_DR_MODE_HOST;
	484	else if (IS_ENABLED(CONFIG_USB_MUSB_GADGET))
	485	pdata->mode = USB_DR_MODE_PERIPHERAL;
	486
	487	switch (pdata->mode) {
	488	case USB_DR_MODE_HOST:
	489	glue->phy_mode = PHY_MODE_USB_HOST;
	490	glue->role = USB_ROLE_HOST;
	491	break;
	492	case USB_DR_MODE_PERIPHERAL:
	493	glue->phy_mode = PHY_MODE_USB_DEVICE;
	494	glue->role = USB_ROLE_DEVICE;
	495	break;
	496	case USB_DR_MODE_OTG:
	497	glue->phy_mode = PHY_MODE_USB_OTG;
	498	glue->role = USB_ROLE_NONE;
	499	break;
	500	default:
	501	dev_err(&pdev->dev, "Error 'dr_mode' property\n");
	502	return -EINVAL;
	503	}
	504
	505	glue->phy = devm_of_phy_get_by_index(dev, np, 0);
	506	if (IS_ERR(glue->phy)) {
	507	dev_err(dev, "fail to getting phy %ld\n",
	508	PTR_ERR(glue->phy));
	509	return PTR_ERR(glue->phy);
	510	}
	511
	512	glue->usb_phy = usb_phy_generic_register();
	513	if (IS_ERR(glue->usb_phy)) {
	514	dev_err(dev, "fail to registering usb-phy %ld\n",
	515	PTR_ERR(glue->usb_phy));
	516	return PTR_ERR(glue->usb_phy);
	517	}
	518
	519	glue->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	520	if (IS_ERR(glue->xceiv)) {
	521	dev_err(dev, "fail to getting usb-phy %d\n", ret);
522	ret = PTR_ERR(glue->xceiv);
523	goto err_unregister_usb_phy;
524	}
525
526	platform_set_drvdata(pdev, glue);
527	pm_runtime_enable(dev);
528	pm_runtime_get_sync(dev);
529
530	ret = mtk_musb_clks_enable(glue);
531	if (ret)
532	goto err_enable_clk;
533
534	pinfo = mtk_dev_info;
535	pinfo.parent = dev;
536	pinfo.res = pdev->resource;
537	pinfo.num_res = pdev->num_resources;
538	pinfo.data = pdata;
539	pinfo.size_data = sizeof(*pdata);
540
541	glue->musb_pdev = platform_device_register_full(&pinfo);
542	if (IS_ERR(glue->musb_pdev)) {
543	ret = PTR_ERR(glue->musb_pdev);
544	dev_err(dev, "failed to register musb device: %d\n", ret);
545	goto err_device_register;
546	}
547
548	return 0;
549
550	err_device_register:
551	mtk_musb_clks_disable(glue);
552	err_enable_clk:
553	pm_runtime_put_sync(dev);
554	pm_runtime_disable(dev);
555	err_unregister_usb_phy:
556	usb_phy_generic_unregister(glue->usb_phy);
557	return ret;
558	}
559
560	static int mtk_musb_remove(struct platform_device *pdev)
561	{
562	struct mtk_glue *glue = platform_get_drvdata(pdev);
563	struct platform_device *usb_phy = glue->usb_phy;
564
565	platform_device_unregister(glue->musb_pdev);
566	usb_phy_generic_unregister(usb_phy);
567
568	return 0;
569	}
570
571	#ifdef CONFIG_OF
572	static const struct of_device_id mtk_musb_match[] = {
573	{.compatible = "mediatek,mtk-musb",},
574	{},
575	};
576	MODULE_DEVICE_TABLE(of, mtk_musb_match);
577	#endif
578
579	static struct platform_driver mtk_musb_driver = {
580	.probe = mtk_musb_probe,
581	.remove = mtk_musb_remove,
582	.driver = {
583	.name = "musb-mtk",
584	.of_match_table = of_match_ptr(mtk_musb_match),
585	},
586	};
587
588	module_platform_driver(mtk_musb_driver);
589
590	MODULE_DESCRIPTION("MediaTek MUSB Glue Layer");
591	MODULE_AUTHOR("Min Guo <min.guo@mediatek.com>");
592	MODULE_LICENSE("GPL v2");