drivers/usb/host/xhci-mtk.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2019 MediaTek, Inc.
  * Authors: Chunfeng Yun <chunfeng.yun@mediatek.com>
  */

 #include <clk.h>
 #include <common.h>
 #include <dm.h>
 #include <dm/devres.h>
 #include <generic-phy.h>
 #include <malloc.h>
 #include <usb.h>
 #include <linux/errno.h>
 #include <linux/compat.h>
 #include <power/regulator.h>
 #include <linux/iopoll.h>
 #include <usb/xhci.h>

 /* IPPC (IP Port Control) registers */
 #define IPPC_IP_PW_CTRL0		0x00
 #define CTRL0_IP_SW_RST			BIT(0)

 #define IPPC_IP_PW_CTRL1		0x04
 #define CTRL1_IP_HOST_PDN		BIT(0)

 #define IPPC_IP_PW_STS1			0x10
 #define STS1_IP_SLEEP_STS		BIT(30)
 #define STS1_U3_MAC_RST			BIT(16)
 #define STS1_XHCI_RST			BIT(11)
 #define STS1_SYS125_RST			BIT(10)
 #define STS1_REF_RST			BIT(8)
 #define STS1_SYSPLL_STABLE		BIT(0)

 #define IPPC_IP_XHCI_CAP		0x24
 #define CAP_U3_PORT_NUM(p)		((p) & 0xff)
 #define CAP_U2_PORT_NUM(p)		(((p) >> 8) & 0xff)

 #define IPPC_U3_CTRL_0P			0x30
 #define CTRL_U3_PORT_HOST_SEL		BIT(2)
 #define CTRL_U3_PORT_PDN		BIT(1)
 #define CTRL_U3_PORT_DIS		BIT(0)

 #define IPPC_U2_CTRL_0P			0x50
 #define CTRL_U2_PORT_HOST_SEL		BIT(2)
 #define CTRL_U2_PORT_PDN		BIT(1)
 #define CTRL_U2_PORT_DIS		BIT(0)

 #define IPPC_U3_CTRL(p)	(IPPC_U3_CTRL_0P + ((p) * 0x08))
 #define IPPC_U2_CTRL(p)	(IPPC_U2_CTRL_0P + ((p) * 0x08))

 struct mtk_xhci {
 	struct xhci_ctrl ctrl;	/* Needs to come first in this struct! */
 	struct xhci_hccr *hcd;
 	void __iomem *ippc;
 	struct udevice *dev;
 	struct udevice *vusb33_supply;
 	struct udevice *vbus_supply;
 	struct clk_bulk clks;
 	struct phy_bulk phys;
 	int num_u2ports;
 	int num_u3ports;
 };

 static int xhci_mtk_host_enable(struct mtk_xhci *mtk)
 {
 	u32 value;
 	u32 check_val;
 	int ret;
 	int i;

 	/* power on host ip */
 	clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);

 	/* power on and enable all u3 ports */
 	for (i = 0; i < mtk->num_u3ports; i++) {
 		clrsetbits_le32(mtk->ippc + IPPC_U3_CTRL(i),
 				CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS,
 				CTRL_U3_PORT_HOST_SEL);
 	}

 	/* power on and enable all u2 ports */
 	for (i = 0; i < mtk->num_u2ports; i++) {
 		clrsetbits_le32(mtk->ippc + IPPC_U2_CTRL(i),
 				CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS,
 				CTRL_U2_PORT_HOST_SEL);
 	}

 	/*
 	 * wait for clocks to be stable, and clock domains reset to
 	 * be inactive after power on and enable ports
 	 */
 	check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
 			STS1_SYS125_RST | STS1_XHCI_RST;

 	if (mtk->num_u3ports)
 		check_val |= STS1_U3_MAC_RST;

 	ret = readl_poll_timeout(mtk->ippc + IPPC_IP_PW_STS1, value,
 				 (check_val == (value & check_val)), 20000);
 	if (ret)
 		dev_err(mtk->dev, "clocks are not stable 0x%x!\n", value);

 	return ret;
 }

 static int xhci_mtk_host_disable(struct mtk_xhci *mtk)
 {
 	int i;

 	/* power down all u3 ports */
 	for (i = 0; i < mtk->num_u3ports; i++)
 		setbits_le32(mtk->ippc + IPPC_U3_CTRL(i), CTRL_U3_PORT_PDN);

 	/* power down all u2 ports */
 	for (i = 0; i < mtk->num_u2ports; i++)
 		setbits_le32(mtk->ippc + IPPC_U2_CTRL(i), CTRL_U2_PORT_PDN);

 	/* power down host ip */
 	setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);

 	return 0;
 }

 static int xhci_mtk_ssusb_init(struct mtk_xhci *mtk)
 {
 	u32 value;

 	/* reset whole ip */
 	setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL0, CTRL0_IP_SW_RST);
 	udelay(1);
 	clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL0, CTRL0_IP_SW_RST);

 	value = readl(mtk->ippc + IPPC_IP_XHCI_CAP);
 	mtk->num_u3ports = CAP_U3_PORT_NUM(value);
 	mtk->num_u2ports = CAP_U2_PORT_NUM(value);
 	dev_info(mtk->dev, "u2p:%d, u3p:%d\n",
 		 mtk->num_u2ports, mtk->num_u3ports);

 	return xhci_mtk_host_enable(mtk);
 }

 static int xhci_mtk_ofdata_get(struct mtk_xhci *mtk)
 {
 	struct udevice *dev = mtk->dev;
 	int ret = 0;

 	mtk->hcd = devfdt_remap_addr_name(dev, "mac");
 	if (!mtk->hcd) {
 		dev_err(dev, "failed to get xHCI base address\n");
 		return -ENXIO;
 	}

 	mtk->ippc = devfdt_remap_addr_name(dev, "ippc");
 	if (!mtk->ippc) {
 		dev_err(dev, "failed to get IPPC base address\n");
 		return -ENXIO;
 	}

 	dev_info(dev, "hcd: 0x%p, ippc: 0x%p\n", mtk->hcd, mtk->ippc);

 	ret = clk_get_bulk(dev, &mtk->clks);
 	if (ret) {
 		dev_err(dev, "failed to get clocks %d!\n", ret);
 		return ret;
 	}

 	ret = device_get_supply_regulator(dev, "vusb33-supply",
 					  &mtk->vusb33_supply);
 	if (ret)
 		debug("can't get vusb33 regulator %d!\n", ret);

 	ret = device_get_supply_regulator(dev, "vbus-supply",
 					  &mtk->vbus_supply);
 	if (ret)
 		debug("can't get vbus regulator %d!\n", ret);

 	return 0;
 }

 static int xhci_mtk_ldos_enable(struct mtk_xhci *mtk)
 {
 	int ret;

 	ret = regulator_set_enable(mtk->vusb33_supply, true);
 	if (ret < 0 && ret != -ENOSYS) {
 		dev_err(mtk->dev, "failed to enable vusb33 %d!\n", ret);
 		return ret;
 	}

 	ret = regulator_set_enable(mtk->vbus_supply, true);
 	if (ret < 0 && ret != -ENOSYS) {
 		dev_err(mtk->dev, "failed to enable vbus %d!\n", ret);
 		regulator_set_enable(mtk->vusb33_supply, false);
 		return ret;
 	}

 	return 0;
 }

 static void xhci_mtk_ldos_disable(struct mtk_xhci *mtk)
 {
 	regulator_set_enable(mtk->vbus_supply, false);
 	regulator_set_enable(mtk->vusb33_supply, false);
 }

 static int xhci_mtk_phy_setup(struct mtk_xhci *mtk)
 {
 	struct udevice *dev = mtk->dev;
 	struct phy_bulk *phys = &mtk->phys;
 	int ret;

 	ret = generic_phy_get_bulk(dev, phys);
 	if (ret)
 		return ret;

 	ret = generic_phy_init_bulk(phys);
 	if (ret)
 		return ret;

 	ret = generic_phy_power_on_bulk(phys);
 	if (ret)
 		generic_phy_exit_bulk(phys);

 	return ret;
 }

 static void xhci_mtk_phy_shutdown(struct mtk_xhci *mtk)
 {
 	generic_phy_power_off_bulk(&mtk->phys);
 	generic_phy_exit_bulk(&mtk->phys);
 }

 static int xhci_mtk_probe(struct udevice *dev)
 {
 	struct mtk_xhci *mtk = dev_get_priv(dev);
 	struct xhci_hcor *hcor;
 	int ret;

 	mtk->dev = dev;
 	ret = xhci_mtk_ofdata_get(mtk);
 	if (ret)
 		return ret;

 	ret = xhci_mtk_ldos_enable(mtk);
 	if (ret)
 		goto ldos_err;

 	ret = clk_enable_bulk(&mtk->clks);
 	if (ret)
 		goto clks_err;

 	ret = xhci_mtk_phy_setup(mtk);
 	if (ret)
 		goto phys_err;

 	ret = xhci_mtk_ssusb_init(mtk);
 	if (ret)
 		goto ssusb_init_err;

 	hcor = (struct xhci_hcor *)((uintptr_t)mtk->hcd +
 			HC_LENGTH(xhci_readl(&mtk->hcd->cr_capbase)));

 	return xhci_register(dev, mtk->hcd, hcor);

 ssusb_init_err:
 	xhci_mtk_phy_shutdown(mtk);
 phys_err:
 	clk_disable_bulk(&mtk->clks);
 clks_err:
 	xhci_mtk_ldos_disable(mtk);
 ldos_err:
 	return ret;
 }

 static int xhci_mtk_remove(struct udevice *dev)
 {
 	struct mtk_xhci *mtk = dev_get_priv(dev);

 	xhci_deregister(dev);
 	xhci_mtk_host_disable(mtk);
 	xhci_mtk_ldos_disable(mtk);
 	clk_disable_bulk(&mtk->clks);

 	return 0;
 }

 static const struct udevice_id xhci_mtk_ids[] = {
 	{ .compatible = "mediatek,mtk-xhci" },
 	{ }
 };

 U_BOOT_DRIVER(usb_xhci) = {
 	.name = "xhci-mtk",
 	.id = UCLASS_USB,
 	.of_match = xhci_mtk_ids,
 	.probe = xhci_mtk_probe,
 	.remove = xhci_mtk_remove,
 	.ops = &xhci_usb_ops,
 	.bind = dm_scan_fdt_dev,
 	.priv_auto_alloc_size = sizeof(struct mtk_xhci),
 	.flags = DM_FLAG_ALLOC_PRIV_DMA,
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (c) 2019 MediaTek, Inc.
	* Authors: Chunfeng Yun <chunfeng.yun@mediatek.com>
	*/

	#include <clk.h>
	#include <common.h>
	#include <dm.h>
	#include <dm/devres.h>
	#include <generic-phy.h>
	#include <malloc.h>
	#include <usb.h>
	#include <linux/errno.h>
	#include <linux/compat.h>
	#include <power/regulator.h>
	#include <linux/iopoll.h>
	#include <usb/xhci.h>

	/* IPPC (IP Port Control) registers */
	#define IPPC_IP_PW_CTRL0 0x00
	#define CTRL0_IP_SW_RST BIT(0)

	#define IPPC_IP_PW_CTRL1 0x04
	#define CTRL1_IP_HOST_PDN BIT(0)

	#define IPPC_IP_PW_STS1 0x10
	#define STS1_IP_SLEEP_STS BIT(30)
	#define STS1_U3_MAC_RST BIT(16)
	#define STS1_XHCI_RST BIT(11)
	#define STS1_SYS125_RST BIT(10)
	#define STS1_REF_RST BIT(8)
	#define STS1_SYSPLL_STABLE BIT(0)

	#define IPPC_IP_XHCI_CAP 0x24
	#define CAP_U3_PORT_NUM(p) ((p) & 0xff)
	#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff)

	#define IPPC_U3_CTRL_0P 0x30
	#define CTRL_U3_PORT_HOST_SEL BIT(2)
	#define CTRL_U3_PORT_PDN BIT(1)
	#define CTRL_U3_PORT_DIS BIT(0)

	#define IPPC_U2_CTRL_0P 0x50
	#define CTRL_U2_PORT_HOST_SEL BIT(2)
	#define CTRL_U2_PORT_PDN BIT(1)
	#define CTRL_U2_PORT_DIS BIT(0)

	#define IPPC_U3_CTRL(p) (IPPC_U3_CTRL_0P + ((p) * 0x08))
	#define IPPC_U2_CTRL(p) (IPPC_U2_CTRL_0P + ((p) * 0x08))

	struct mtk_xhci {
	struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
	struct xhci_hccr *hcd;
	void __iomem *ippc;
	struct udevice *dev;
	struct udevice *vusb33_supply;
	struct udevice *vbus_supply;
	struct clk_bulk clks;
	struct phy_bulk phys;
	int num_u2ports;
	int num_u3ports;
	};

	static int xhci_mtk_host_enable(struct mtk_xhci *mtk)
	{
	u32 value;
	u32 check_val;
	int ret;
	int i;

	/* power on host ip */
	clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);

	/* power on and enable all u3 ports */
	for (i = 0; i < mtk->num_u3ports; i++) {
	clrsetbits_le32(mtk->ippc + IPPC_U3_CTRL(i),
	CTRL_U3_PORT_PDN \| CTRL_U3_PORT_DIS,
	CTRL_U3_PORT_HOST_SEL);
	}

	/* power on and enable all u2 ports */
	for (i = 0; i < mtk->num_u2ports; i++) {
	clrsetbits_le32(mtk->ippc + IPPC_U2_CTRL(i),
	CTRL_U2_PORT_PDN \| CTRL_U2_PORT_DIS,
	CTRL_U2_PORT_HOST_SEL);
	}

	/*
	* wait for clocks to be stable, and clock domains reset to
	* be inactive after power on and enable ports
	*/
	check_val = STS1_SYSPLL_STABLE \| STS1_REF_RST \|
	STS1_SYS125_RST \| STS1_XHCI_RST;

	if (mtk->num_u3ports)
	check_val \|= STS1_U3_MAC_RST;

	ret = readl_poll_timeout(mtk->ippc + IPPC_IP_PW_STS1, value,
	(check_val == (value & check_val)), 20000);
	if (ret)
	dev_err(mtk->dev, "clocks are not stable 0x%x!\n", value);

	return ret;
	}

	static int xhci_mtk_host_disable(struct mtk_xhci *mtk)
	{
	int i;

	/* power down all u3 ports */
	for (i = 0; i < mtk->num_u3ports; i++)
	setbits_le32(mtk->ippc + IPPC_U3_CTRL(i), CTRL_U3_PORT_PDN);

	/* power down all u2 ports */
	for (i = 0; i < mtk->num_u2ports; i++)
	setbits_le32(mtk->ippc + IPPC_U2_CTRL(i), CTRL_U2_PORT_PDN);

	/* power down host ip */
	setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);

	return 0;
	}

	static int xhci_mtk_ssusb_init(struct mtk_xhci *mtk)
	{
	u32 value;

	/* reset whole ip */
	setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL0, CTRL0_IP_SW_RST);
	udelay(1);
	clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL0, CTRL0_IP_SW_RST);

	value = readl(mtk->ippc + IPPC_IP_XHCI_CAP);
	mtk->num_u3ports = CAP_U3_PORT_NUM(value);
	mtk->num_u2ports = CAP_U2_PORT_NUM(value);
	dev_info(mtk->dev, "u2p:%d, u3p:%d\n",
	mtk->num_u2ports, mtk->num_u3ports);

	return xhci_mtk_host_enable(mtk);
	}

	static int xhci_mtk_ofdata_get(struct mtk_xhci *mtk)
	{
	struct udevice *dev = mtk->dev;
	int ret = 0;

	mtk->hcd = devfdt_remap_addr_name(dev, "mac");
	if (!mtk->hcd) {
	dev_err(dev, "failed to get xHCI base address\n");
	return -ENXIO;
	}

	mtk->ippc = devfdt_remap_addr_name(dev, "ippc");
	if (!mtk->ippc) {
	dev_err(dev, "failed to get IPPC base address\n");
	return -ENXIO;
	}

	dev_info(dev, "hcd: 0x%p, ippc: 0x%p\n", mtk->hcd, mtk->ippc);

	ret = clk_get_bulk(dev, &mtk->clks);
	if (ret) {
	dev_err(dev, "failed to get clocks %d!\n", ret);
	return ret;
	}

	ret = device_get_supply_regulator(dev, "vusb33-supply",
	&mtk->vusb33_supply);
	if (ret)
	debug("can't get vusb33 regulator %d!\n", ret);

	ret = device_get_supply_regulator(dev, "vbus-supply",
	&mtk->vbus_supply);
	if (ret)
	debug("can't get vbus regulator %d!\n", ret);

	return 0;
	}

	static int xhci_mtk_ldos_enable(struct mtk_xhci *mtk)
	{
	int ret;

	ret = regulator_set_enable(mtk->vusb33_supply, true);
	if (ret < 0 && ret != -ENOSYS) {
	dev_err(mtk->dev, "failed to enable vusb33 %d!\n", ret);
	return ret;
	}

	ret = regulator_set_enable(mtk->vbus_supply, true);
	if (ret < 0 && ret != -ENOSYS) {
	dev_err(mtk->dev, "failed to enable vbus %d!\n", ret);
	regulator_set_enable(mtk->vusb33_supply, false);
	return ret;
	}

	return 0;
	}

	static void xhci_mtk_ldos_disable(struct mtk_xhci *mtk)
	{
	regulator_set_enable(mtk->vbus_supply, false);
	regulator_set_enable(mtk->vusb33_supply, false);
	}

	static int xhci_mtk_phy_setup(struct mtk_xhci *mtk)
	{
	struct udevice *dev = mtk->dev;
	struct phy_bulk *phys = &mtk->phys;
	int ret;

	ret = generic_phy_get_bulk(dev, phys);
	if (ret)
	return ret;

	ret = generic_phy_init_bulk(phys);
	if (ret)
	return ret;

	ret = generic_phy_power_on_bulk(phys);
	if (ret)
	generic_phy_exit_bulk(phys);

	return ret;
	}

	static void xhci_mtk_phy_shutdown(struct mtk_xhci *mtk)
	{
	generic_phy_power_off_bulk(&mtk->phys);
	generic_phy_exit_bulk(&mtk->phys);
	}

	static int xhci_mtk_probe(struct udevice *dev)
	{
	struct mtk_xhci *mtk = dev_get_priv(dev);
	struct xhci_hcor *hcor;
	int ret;

	mtk->dev = dev;
	ret = xhci_mtk_ofdata_get(mtk);
	if (ret)
	return ret;

	ret = xhci_mtk_ldos_enable(mtk);
	if (ret)
	goto ldos_err;

	ret = clk_enable_bulk(&mtk->clks);
	if (ret)
	goto clks_err;

	ret = xhci_mtk_phy_setup(mtk);
	if (ret)
	goto phys_err;

	ret = xhci_mtk_ssusb_init(mtk);
	if (ret)
	goto ssusb_init_err;

	hcor = (struct xhci_hcor *)((uintptr_t)mtk->hcd +
	HC_LENGTH(xhci_readl(&mtk->hcd->cr_capbase)));

	return xhci_register(dev, mtk->hcd, hcor);

	ssusb_init_err:
	xhci_mtk_phy_shutdown(mtk);
	phys_err:
	clk_disable_bulk(&mtk->clks);
	clks_err:
	xhci_mtk_ldos_disable(mtk);
	ldos_err:
	return ret;
	}

	static int xhci_mtk_remove(struct udevice *dev)
	{
	struct mtk_xhci *mtk = dev_get_priv(dev);

	xhci_deregister(dev);
	xhci_mtk_host_disable(mtk);
	xhci_mtk_ldos_disable(mtk);
	clk_disable_bulk(&mtk->clks);

	return 0;
	}

	static const struct udevice_id xhci_mtk_ids[] = {
	{ .compatible = "mediatek,mtk-xhci" },
	{ }
	};

	U_BOOT_DRIVER(usb_xhci) = {
	.name = "xhci-mtk",
	.id = UCLASS_USB,
	.of_match = xhci_mtk_ids,
	.probe = xhci_mtk_probe,
	.remove = xhci_mtk_remove,
	.ops = &xhci_usb_ops,
	.bind = dm_scan_fdt_dev,
	.priv_auto_alloc_size = sizeof(struct mtk_xhci),
	.flags = DM_FLAG_ALLOC_PRIV_DMA,
	};