arch/mips/mach-ath79/reset.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
  * Copyright (C) 2018-2019 Rosy Song <rosysong@rosinson.com>
  */

 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
 #include <asm/io.h>
 #include <asm/addrspace.h>
 #include <asm/types.h>
 #include <mach/ath79.h>
 #include <mach/ar71xx_regs.h>

 /* QCA956X ETH_SGMII_SERDES Registers */
 #define SGMII_SERDES_RES_CALIBRATION_LSB 23
 #define SGMII_SERDES_RES_CALIBRATION_MASK 0x07800000
 #define SGMII_SERDES_RES_CALIBRATION_SET(x) \
 	(((x) << SGMII_SERDES_RES_CALIBRATION_LSB) & SGMII_SERDES_RES_CALIBRATION_MASK)
 #define SGMII_SERDES_CDR_BW_LSB 1
 #define SGMII_SERDES_CDR_BW_MASK 0x00000006
 #define SGMII_SERDES_CDR_BW_SET(x) \
 	(((x) << SGMII_SERDES_CDR_BW_LSB) & SGMII_SERDES_CDR_BW_MASK)
 #define SGMII_SERDES_TX_DR_CTRL_LSB 4
 #define SGMII_SERDES_TX_DR_CTRL_MASK 0x00000070
 #define SGMII_SERDES_TX_DR_CTRL_SET(x) \
 	(((x) << SGMII_SERDES_TX_DR_CTRL_LSB) & SGMII_SERDES_TX_DR_CTRL_MASK)
 #define SGMII_SERDES_PLL_BW_LSB 8
 #define SGMII_SERDES_PLL_BW_MASK 0x00000100
 #define SGMII_SERDES_PLL_BW_SET(x) \
 	(((x) << SGMII_SERDES_PLL_BW_LSB) & SGMII_SERDES_PLL_BW_MASK)
 #define SGMII_SERDES_EN_SIGNAL_DETECT_LSB 16
 #define SGMII_SERDES_EN_SIGNAL_DETECT_MASK 0x00010000
 #define SGMII_SERDES_EN_SIGNAL_DETECT_SET(x) \
 	(((x) << SGMII_SERDES_EN_SIGNAL_DETECT_LSB) & SGMII_SERDES_EN_SIGNAL_DETECT_MASK)
 #define SGMII_SERDES_FIBER_SDO_LSB 17
 #define SGMII_SERDES_FIBER_SDO_MASK 0x00020000
 #define SGMII_SERDES_FIBER_SDO_SET(x) \
 	(((x) << SGMII_SERDES_FIBER_SDO_LSB) & SGMII_SERDES_FIBER_SDO_MASK)
 #define SGMII_SERDES_VCO_REG_LSB 27
 #define SGMII_SERDES_VCO_REG_MASK 0x78000000
 #define SGMII_SERDES_VCO_REG_SET(x) \
 	(((x) << SGMII_SERDES_VCO_REG_LSB) & SGMII_SERDES_VCO_REG_MASK)
 #define SGMII_SERDES_VCO_FAST_LSB 9
 #define SGMII_SERDES_VCO_FAST_MASK 0x00000200
 #define SGMII_SERDES_VCO_FAST_GET(x) \
 	(((x) & SGMII_SERDES_VCO_FAST_MASK) >> SGMII_SERDES_VCO_FAST_LSB)
 #define SGMII_SERDES_VCO_SLOW_LSB 10
 #define SGMII_SERDES_VCO_SLOW_MASK 0x00000400
 #define SGMII_SERDES_VCO_SLOW_GET(x) \
 	(((x) & SGMII_SERDES_VCO_SLOW_MASK) >> SGMII_SERDES_VCO_SLOW_LSB)

 void _machine_restart(void)
 {
 	void __iomem *base;
 	u32 reg = 0;

 	base = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 			   MAP_NOCACHE);
 	if (soc_is_ar71xx())
 		reg = AR71XX_RESET_REG_RESET_MODULE;
 	else if (soc_is_ar724x())
 		reg = AR724X_RESET_REG_RESET_MODULE;
 	else if (soc_is_ar913x())
 		reg = AR913X_RESET_REG_RESET_MODULE;
 	else if (soc_is_ar933x())
 		reg = AR933X_RESET_REG_RESET_MODULE;
 	else if (soc_is_ar934x())
 		reg = AR934X_RESET_REG_RESET_MODULE;
 	else if (soc_is_qca953x())
 		reg = QCA953X_RESET_REG_RESET_MODULE;
 	else if (soc_is_qca955x())
 		reg = QCA955X_RESET_REG_RESET_MODULE;
 	else if (soc_is_qca956x())
 		reg = QCA956X_RESET_REG_RESET_MODULE;
 	else
 		puts("Reset register not defined for this SOC\n");

 	if (reg)
 		setbits_be32(base + reg, AR71XX_RESET_FULL_CHIP);

 	while (1)
 		/* NOP */;
 }

 u32 ath79_get_bootstrap(void)
 {
 	void __iomem *base;
 	u32 reg = 0;

 	base = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 			   MAP_NOCACHE);
 	if (soc_is_ar933x())
 		reg = AR933X_RESET_REG_BOOTSTRAP;
 	else if (soc_is_ar934x())
 		reg = AR934X_RESET_REG_BOOTSTRAP;
 	else if (soc_is_qca953x())
 		reg = QCA953X_RESET_REG_BOOTSTRAP;
 	else if (soc_is_qca955x())
 		reg = QCA955X_RESET_REG_BOOTSTRAP;
 	else if (soc_is_qca956x())
 		reg = QCA956X_RESET_REG_BOOTSTRAP;
 	else
 		puts("Bootstrap register not defined for this SOC\n");

 	if (reg)
 		return readl(base + reg);

 	return 0;
 }

 static int eth_init_ar933x(void)
 {
 	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *gregs = map_physmem(AR933X_GMAC_BASE, AR933X_GMAC_SIZE,
 					  MAP_NOCACHE);
 	const u32 mask = AR933X_RESET_GE0_MAC | AR933X_RESET_GE0_MDIO |
 			 AR933X_RESET_GE1_MAC | AR933X_RESET_GE1_MDIO |
 			 AR933X_RESET_ETH_SWITCH |
 			 AR933X_RESET_ETH_SWITCH_ANALOG;

 	/* Clear MDIO slave EN bit. */
 	clrbits_be32(rregs + AR933X_RESET_REG_BOOTSTRAP, BIT(17));
 	mdelay(10);

 	/* Get Atheros S26 PHY out of reset. */
 	clrsetbits_be32(pregs + AR933X_PLL_SWITCH_CLOCK_CONTROL_REG,
 			0x1f, 0x10);
 	mdelay(10);

 	setbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
 	mdelay(10);
 	clrbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
 	mdelay(10);

 	/* Configure AR93xx GMAC register. */
 	clrsetbits_be32(gregs + AR933X_GMAC_REG_ETH_CFG,
 			AR933X_ETH_CFG_MII_GE0_MASTER |
 			AR933X_ETH_CFG_MII_GE0_SLAVE,
 			AR933X_ETH_CFG_MII_GE0_SLAVE);
 	return 0;
 }

 static int eth_init_ar934x(void)
 {
 	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *gregs = map_physmem(AR934X_GMAC_BASE, AR934X_GMAC_SIZE,
 					  MAP_NOCACHE);
 	const u32 mask = AR934X_RESET_GE0_MAC | AR934X_RESET_GE0_MDIO |
 			 AR934X_RESET_GE1_MAC | AR934X_RESET_GE1_MDIO |
 			 AR934X_RESET_ETH_SWITCH_ANALOG;
 	u32 reg;

 	reg = readl(rregs + AR934X_RESET_REG_BOOTSTRAP);
 	if (reg & AR934X_BOOTSTRAP_REF_CLK_40)
 		writel(0x570, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
 	else
 		writel(0x271, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
 	writel(BIT(26) | BIT(25), pregs + AR934X_PLL_ETH_XMII_CONTROL_REG);

 	setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);
 	clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);

 	/* Configure AR934x GMAC register. */
 	writel(AR934X_ETH_CFG_RGMII_GMAC0, gregs + AR934X_GMAC_REG_ETH_CFG);
 	return 0;
 }

 static int eth_init_qca953x(void)
 {
 	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 					  MAP_NOCACHE);
 	const u32 mask = QCA953X_RESET_GE0_MAC | QCA953X_RESET_GE0_MDIO |
 			 QCA953X_RESET_GE1_MAC | QCA953X_RESET_GE1_MDIO |
 			 QCA953X_RESET_ETH_SWITCH_ANALOG |
 			 QCA953X_RESET_ETH_SWITCH;

 	setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);
 	clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);

 	return 0;
 }

 static int qca956x_sgmii_cal(void)
 {
 	int i;
 	u32 reg, rev_sgmii_val;
 	u32 vco_fast, vco_slow;
 	u32 start_val = 0, end_val = 0;
 	void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 					  MAP_NOCACHE);
 	const u32 mask = QCA956X_RESET_SGMII_ASSERT | QCA956X_RESET_SGMII;

 	writel(BIT(2) | BIT(0), pregs + QCA956X_PLL_ETH_SGMII_SERDES_REG);

 	reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
 	vco_fast = SGMII_SERDES_VCO_FAST_GET(reg);
 	vco_slow = SGMII_SERDES_VCO_SLOW_GET(reg);

 	/* Set resistor calibration from 0000 to 1111 */
 	for (i = 0; i < 0x10; i++) {
 		reg = (readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) &
 		      ~SGMII_SERDES_RES_CALIBRATION_MASK) |
 		      SGMII_SERDES_RES_CALIBRATION_SET(i);
 		writel(reg, gregs + QCA956X_GMAC_REG_SGMII_SERDES);

 		udelay(50);

 		reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
 		if (vco_fast != SGMII_SERDES_VCO_FAST_GET(reg) ||
 		    vco_slow != SGMII_SERDES_VCO_SLOW_GET(reg)) {
 			if (start_val == 0) {
 				start_val = i;
 				end_val = i;
 			} else {
 				end_val = i;
 			}
 		}
 		vco_fast = SGMII_SERDES_VCO_FAST_GET(reg);
 		vco_slow = SGMII_SERDES_VCO_SLOW_GET(reg);
 	}

 	if (start_val == 0)
 		rev_sgmii_val = 0x7;
 	else
 		rev_sgmii_val = (start_val + end_val) >> 1;

 	writel((readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) &
 	       ~SGMII_SERDES_RES_CALIBRATION_MASK) |
 	       SGMII_SERDES_RES_CALIBRATION_SET(rev_sgmii_val),
 	       gregs + QCA956X_GMAC_REG_SGMII_SERDES);

 	writel(BIT(2) | BIT(0), pregs + QCA956X_PLL_ETH_SGMII_SERDES_REG);

 	reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
 	writel(SGMII_SERDES_CDR_BW_SET(3) | SGMII_SERDES_TX_DR_CTRL_SET(1) |
 	       SGMII_SERDES_PLL_BW_SET(1) | SGMII_SERDES_EN_SIGNAL_DETECT_SET(1) |
 	       SGMII_SERDES_FIBER_SDO_SET(1) | SGMII_SERDES_VCO_REG_SET(3) | reg,
 	       gregs + QCA956X_GMAC_REG_SGMII_SERDES);

 	setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);
 	clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);

 	while (!(readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) & BIT(15)))
 		/* NOP */;

 	return 0;
 }

 static int qca956x_sgmii_setup(void)
 {
 	int i;
 	u32 s = 0, reg = 0;
 	u32 _regs[] = {
 		BIT(4),	/* HW_RX_125M_N */
 		BIT(2),	/* RX_125M_N */
 		BIT(3),	/* TX_125M_N */
 		BIT(0),	/* RX_CLK_N */
 		BIT(1),	/* TX_CLK_N */
 	};
 	void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
 					  MAP_NOCACHE);

 	/* Force sgmii mode */
 	writel(BIT(6) | BIT(15) | BIT(8), gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
 	udelay(10);
 	writel(0x2 | BIT(5) | (0x2 << 6), gregs + QCA956X_GMAC_REG_SGMII_CONFIG);

 	/* SGMII reset sequence sugguest by qca systems team. */
 	writel(0, gregs + QCA956X_GMAC_REG_SGMII_RESET);
 	for (i = 0; i < ARRAY_SIZE(_regs); i++) {
 		reg |= _regs[i];
 		writel(reg, gregs + QCA956X_GMAC_REG_SGMII_RESET);
 	}

 	writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) & ~BIT(15),
 	       gregs + QCA956X_GMAC_REG_MR_AN_CTRL);

 	/*
 	 * WARNING: Across resets SGMII link status goes to weird state.
 	 * if 0xb8070058 (SGMII_DEBUG Register) reads other than 0xf or 0x10
 	 * for sure we are in bad state.
 	 * Issue a PHY RESET in MR_AN_CONTROL_ADDRESS to keep going.
 	 */
 	i = 0;
 	s = (readl(gregs + QCA956X_GMAC_REG_SGMII_DEBUG) & 0xff);
 	while (!(s == 0xf || s == 0x10)) {
 		writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) | BIT(15),
 		       gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
 		udelay(100);
 		writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) & ~BIT(15),
 		       gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
 		if (i++ == 10)
 			break;
 		s = (readl(gregs + QCA956X_GMAC_REG_SGMII_DEBUG) & 0xff);
 	}

 	return 0;
 }

 static int qca956x_s17_reset(void)
 {
 	void __iomem *regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 					  MAP_NOCACHE);
 	const u32 mask = QCA956X_RESET_SGMII_ASSERT | QCA956X_RESET_SGMII |
 			 QCA956X_RESET_EXTERNAL | QCA956X_RESET_SGMII_ANALOG |
 			 QCA956X_RESET_SWITCH;
 	/* Bits(Reserved in datasheet) should be set to 1 */
 	const u32 mask_r = QCA956X_RESET_SGMII_ASSERT | QCA956X_RESET_SGMII |
 			 QCA956X_RESET_EXTERNAL;

 	setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);
 	clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask_r);
 	mdelay(1);

 	/* Reset s17 switch(GPIO11) SYS_RST_L */
 	writel(readl(regs + AR71XX_GPIO_REG_OE) & ~BIT(11),
 	       regs + AR71XX_GPIO_REG_OE);
 	udelay(100);

 	writel(readl(regs + AR71XX_GPIO_REG_OUT) & ~BIT(11),
 	       regs + AR71XX_GPIO_REG_OUT);
 	udelay(100);
 	writel(readl(regs + AR71XX_GPIO_REG_OUT) | BIT(11),
 	       regs + AR71XX_GPIO_REG_OUT);

 	return 0;
 }

 static int qca956x_init_mdio(void)
 {
 	u32 reg;
 	void __iomem *regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
 						MAP_NOCACHE);
 	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
 					  MAP_NOCACHE);
 	const u32 mask = QCA956X_RESET_GE0_MDIO | QCA956X_RESET_GE0_MAC |
 			 QCA956X_RESET_GE1_MDIO | QCA956X_RESET_GE1_MAC;

 	setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);
 	clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
 	mdelay(1);

 	/* GPIO4 as MDI */
 	reg = readl(regs + QCA956X_GPIO_REG_IN_ENABLE3);
 	reg &= ~(0xff << 16);
 	reg |= (0x4 << 16);
 	writel(reg, regs + QCA956X_GPIO_REG_IN_ENABLE3);

 	/* GPIO4 as MDO */
 	reg = readl(regs + QCA956X_GPIO_REG_OUT_FUNC1);
 	reg &= ~0xff;
 	reg |= 0x20;
 	writel(reg, regs + QCA956X_GPIO_REG_OUT_FUNC1);

 	/* Init MDC(GPIO3) / MDIO(GPIO4) */
 	reg = readl(regs + AR71XX_GPIO_REG_OE);
 	reg &= ~BIT(4);
 	writel(reg, regs + AR71XX_GPIO_REG_OE);
 	udelay(100);

 	reg = readl(regs + AR71XX_GPIO_REG_OE);
 	reg &= ~BIT(3);
 	writel(reg, regs + AR71XX_GPIO_REG_OE);
 	udelay(100);

 	/* GPIO3 as MDI */
 	reg = readl(regs + QCA956X_GPIO_REG_OUT_FUNC0);
 	reg &= ~(0xff << 24);
 	reg |= (0x21 << 24);
 	writel(reg, regs + QCA956X_GPIO_REG_OUT_FUNC0);

 	return 0;
 }

 static int eth_init_qca956x(void)
 {
 	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
 					  MAP_NOCACHE);
 	void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
 					  MAP_NOCACHE);

 	qca956x_sgmii_cal();
 	qca956x_s17_reset();
 	qca956x_init_mdio();

 	if (ath79_get_bootstrap() & QCA956X_BOOTSTRAP_REF_CLK_40)
 		writel(0x45500, pregs + QCA956X_PLL_SWITCH_CLK_CTRL_REG);
 	else
 		writel(0xc5200, pregs + QCA956X_PLL_SWITCH_CLK_CTRL_REG);

 	qca956x_sgmii_setup();

 	writel((3 << 16) | (3 << 14) | (1 << 0) | (1 << 6),
 	       gregs + QCA956X_GMAC_REG_ETH_CFG);

 	writel((1 << 31) | (2 << 28) | (2 << 26) | (1 << 25),
 	       pregs + QCA956X_PLL_ETH_XMII_CTRL_REG);
 	mdelay(1);

 	return 0;
 }

 int ath79_eth_reset(void)
 {
 	/*
 	 * Un-reset ethernet. DM still doesn't have any notion of reset
 	 * framework, so we do it by hand here.
 	 */
 	if (soc_is_ar933x())
 		return eth_init_ar933x();
 	if (soc_is_ar934x())
 		return eth_init_ar934x();
 	if (soc_is_qca953x())
 		return eth_init_qca953x();
 	if (soc_is_qca956x())
 		return eth_init_qca956x();

 	return -EINVAL;
 }

 static int usb_reset_ar933x(void __iomem *reset_regs)
 {
 	/* Ungate the USB block */
 	setbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
 		     AR933X_RESET_USBSUS_OVERRIDE);
 	mdelay(1);
 	clrbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
 		     AR933X_RESET_USB_HOST);
 	mdelay(1);
 	clrbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
 		     AR933X_RESET_USB_PHY);
 	mdelay(1);

 	return 0;
 }

 static int usb_reset_ar934x(void __iomem *reset_regs)
 {
 	/* Ungate the USB block */
 	setbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
 		     AR934X_RESET_USBSUS_OVERRIDE);
 	mdelay(1);
 	clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
 		     AR934X_RESET_USB_PHY);
 	mdelay(1);
 	clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
 		     AR934X_RESET_USB_PHY_ANALOG);
 	mdelay(1);
 	clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
 		     AR934X_RESET_USB_HOST);
 	mdelay(1);

 	return 0;
 }

 static int usb_reset_qca953x(void __iomem *reset_regs)
 {
 	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
 					  MAP_NOCACHE);

 	clrsetbits_be32(pregs + QCA953X_PLL_SWITCH_CLOCK_CONTROL_REG,
 			0xf00, 0x200);
 	mdelay(10);

 	/* Ungate the USB block */
 	setbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
 		     QCA953X_RESET_USBSUS_OVERRIDE);
 	mdelay(1);
 	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
 		     QCA953X_RESET_USB_PHY);
 	mdelay(1);
 	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
 		     QCA953X_RESET_USB_PHY_ANALOG);
 	mdelay(1);
 	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
 		     QCA953X_RESET_USB_HOST);
 	mdelay(1);
 	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
 		     QCA953X_RESET_USB_PHY_PLL_PWD_EXT);
 	mdelay(1);

 	return 0;
 }

 int ath79_usb_reset(void)
 {
 	void __iomem *usbc_regs = map_physmem(AR71XX_USB_CTRL_BASE,
 					      AR71XX_USB_CTRL_SIZE,
 					      MAP_NOCACHE);
 	void __iomem *reset_regs = map_physmem(AR71XX_RESET_BASE,
 					       AR71XX_RESET_SIZE,
 					       MAP_NOCACHE);
 	/*
 	 * Turn on the Buff and Desc swap bits.
 	 * NOTE: This write into an undocumented register in mandatory to
 	 *       get the USB controller operational in BigEndian mode.
 	 */
 	writel(0xf0000, usbc_regs + AR71XX_USB_CTRL_REG_CONFIG);

 	if (soc_is_ar933x())
 		return usb_reset_ar933x(reset_regs);
 	if (soc_is_ar934x())
 		return usb_reset_ar934x(reset_regs);
 	if (soc_is_qca953x())
 		return usb_reset_qca953x(reset_regs);

 	return -EINVAL;
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
	* Copyright (C) 2018-2019 Rosy Song <rosysong@rosinson.com>
	*/

	#include <linux/bitops.h>
	#include <linux/delay.h>
	#include <linux/errno.h>
	#include <asm/io.h>
	#include <asm/addrspace.h>
	#include <asm/types.h>
	#include <mach/ath79.h>
	#include <mach/ar71xx_regs.h>

	/* QCA956X ETH_SGMII_SERDES Registers */
	#define SGMII_SERDES_RES_CALIBRATION_LSB 23
	#define SGMII_SERDES_RES_CALIBRATION_MASK 0x07800000
	#define SGMII_SERDES_RES_CALIBRATION_SET(x) \
	(((x) << SGMII_SERDES_RES_CALIBRATION_LSB) & SGMII_SERDES_RES_CALIBRATION_MASK)
	#define SGMII_SERDES_CDR_BW_LSB 1
	#define SGMII_SERDES_CDR_BW_MASK 0x00000006
	#define SGMII_SERDES_CDR_BW_SET(x) \
	(((x) << SGMII_SERDES_CDR_BW_LSB) & SGMII_SERDES_CDR_BW_MASK)
	#define SGMII_SERDES_TX_DR_CTRL_LSB 4
	#define SGMII_SERDES_TX_DR_CTRL_MASK 0x00000070
	#define SGMII_SERDES_TX_DR_CTRL_SET(x) \
	(((x) << SGMII_SERDES_TX_DR_CTRL_LSB) & SGMII_SERDES_TX_DR_CTRL_MASK)
	#define SGMII_SERDES_PLL_BW_LSB 8
	#define SGMII_SERDES_PLL_BW_MASK 0x00000100
	#define SGMII_SERDES_PLL_BW_SET(x) \
	(((x) << SGMII_SERDES_PLL_BW_LSB) & SGMII_SERDES_PLL_BW_MASK)
	#define SGMII_SERDES_EN_SIGNAL_DETECT_LSB 16
	#define SGMII_SERDES_EN_SIGNAL_DETECT_MASK 0x00010000
	#define SGMII_SERDES_EN_SIGNAL_DETECT_SET(x) \
	(((x) << SGMII_SERDES_EN_SIGNAL_DETECT_LSB) & SGMII_SERDES_EN_SIGNAL_DETECT_MASK)
	#define SGMII_SERDES_FIBER_SDO_LSB 17
	#define SGMII_SERDES_FIBER_SDO_MASK 0x00020000
	#define SGMII_SERDES_FIBER_SDO_SET(x) \
	(((x) << SGMII_SERDES_FIBER_SDO_LSB) & SGMII_SERDES_FIBER_SDO_MASK)
	#define SGMII_SERDES_VCO_REG_LSB 27
	#define SGMII_SERDES_VCO_REG_MASK 0x78000000
	#define SGMII_SERDES_VCO_REG_SET(x) \
	(((x) << SGMII_SERDES_VCO_REG_LSB) & SGMII_SERDES_VCO_REG_MASK)
	#define SGMII_SERDES_VCO_FAST_LSB 9
	#define SGMII_SERDES_VCO_FAST_MASK 0x00000200
	#define SGMII_SERDES_VCO_FAST_GET(x) \
	(((x) & SGMII_SERDES_VCO_FAST_MASK) >> SGMII_SERDES_VCO_FAST_LSB)
	#define SGMII_SERDES_VCO_SLOW_LSB 10
	#define SGMII_SERDES_VCO_SLOW_MASK 0x00000400
	#define SGMII_SERDES_VCO_SLOW_GET(x) \
	(((x) & SGMII_SERDES_VCO_SLOW_MASK) >> SGMII_SERDES_VCO_SLOW_LSB)

	void _machine_restart(void)
	{
	void __iomem *base;
	u32 reg = 0;

	base = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	if (soc_is_ar71xx())
	reg = AR71XX_RESET_REG_RESET_MODULE;
	else if (soc_is_ar724x())
	reg = AR724X_RESET_REG_RESET_MODULE;
	else if (soc_is_ar913x())
	reg = AR913X_RESET_REG_RESET_MODULE;
	else if (soc_is_ar933x())
	reg = AR933X_RESET_REG_RESET_MODULE;
	else if (soc_is_ar934x())
	reg = AR934X_RESET_REG_RESET_MODULE;
	else if (soc_is_qca953x())
	reg = QCA953X_RESET_REG_RESET_MODULE;
	else if (soc_is_qca955x())
	reg = QCA955X_RESET_REG_RESET_MODULE;
	else if (soc_is_qca956x())
	reg = QCA956X_RESET_REG_RESET_MODULE;
	else
	puts("Reset register not defined for this SOC\n");

	if (reg)
	setbits_be32(base + reg, AR71XX_RESET_FULL_CHIP);

	while (1)
	/* NOP */;
	}

	u32 ath79_get_bootstrap(void)
	{
	void __iomem *base;
	u32 reg = 0;

	base = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	if (soc_is_ar933x())
	reg = AR933X_RESET_REG_BOOTSTRAP;
	else if (soc_is_ar934x())
	reg = AR934X_RESET_REG_BOOTSTRAP;
	else if (soc_is_qca953x())
	reg = QCA953X_RESET_REG_BOOTSTRAP;
	else if (soc_is_qca955x())
	reg = QCA955X_RESET_REG_BOOTSTRAP;
	else if (soc_is_qca956x())
	reg = QCA956X_RESET_REG_BOOTSTRAP;
	else
	puts("Bootstrap register not defined for this SOC\n");

	if (reg)
	return readl(base + reg);

	return 0;
	}

	static int eth_init_ar933x(void)
	{
	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
	MAP_NOCACHE);
	void __iomem *gregs = map_physmem(AR933X_GMAC_BASE, AR933X_GMAC_SIZE,
	MAP_NOCACHE);
	const u32 mask = AR933X_RESET_GE0_MAC \| AR933X_RESET_GE0_MDIO \|
	AR933X_RESET_GE1_MAC \| AR933X_RESET_GE1_MDIO \|
	AR933X_RESET_ETH_SWITCH \|
	AR933X_RESET_ETH_SWITCH_ANALOG;

	/* Clear MDIO slave EN bit. */
	clrbits_be32(rregs + AR933X_RESET_REG_BOOTSTRAP, BIT(17));
	mdelay(10);

	/* Get Atheros S26 PHY out of reset. */
	clrsetbits_be32(pregs + AR933X_PLL_SWITCH_CLOCK_CONTROL_REG,
	0x1f, 0x10);
	mdelay(10);

	setbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
	mdelay(10);
	clrbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
	mdelay(10);

	/* Configure AR93xx GMAC register. */
	clrsetbits_be32(gregs + AR933X_GMAC_REG_ETH_CFG,
	AR933X_ETH_CFG_MII_GE0_MASTER \|
	AR933X_ETH_CFG_MII_GE0_SLAVE,
	AR933X_ETH_CFG_MII_GE0_SLAVE);
	return 0;
	}

	static int eth_init_ar934x(void)
	{
	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
	MAP_NOCACHE);
	void __iomem *gregs = map_physmem(AR934X_GMAC_BASE, AR934X_GMAC_SIZE,
	MAP_NOCACHE);
	const u32 mask = AR934X_RESET_GE0_MAC \| AR934X_RESET_GE0_MDIO \|
	AR934X_RESET_GE1_MAC \| AR934X_RESET_GE1_MDIO \|
	AR934X_RESET_ETH_SWITCH_ANALOG;
	u32 reg;

	reg = readl(rregs + AR934X_RESET_REG_BOOTSTRAP);
	if (reg & AR934X_BOOTSTRAP_REF_CLK_40)
	writel(0x570, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
	else
	writel(0x271, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
	writel(BIT(26) \| BIT(25), pregs + AR934X_PLL_ETH_XMII_CONTROL_REG);

	setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);
	clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);

	/* Configure AR934x GMAC register. */
	writel(AR934X_ETH_CFG_RGMII_GMAC0, gregs + AR934X_GMAC_REG_ETH_CFG);
	return 0;
	}

	static int eth_init_qca953x(void)
	{
	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	const u32 mask = QCA953X_RESET_GE0_MAC \| QCA953X_RESET_GE0_MDIO \|
	QCA953X_RESET_GE1_MAC \| QCA953X_RESET_GE1_MDIO \|
	QCA953X_RESET_ETH_SWITCH_ANALOG \|
	QCA953X_RESET_ETH_SWITCH;

	setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);
	clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);

	return 0;
	}

	static int qca956x_sgmii_cal(void)
	{
	int i;
	u32 reg, rev_sgmii_val;
	u32 vco_fast, vco_slow;
	u32 start_val = 0, end_val = 0;
	void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
	MAP_NOCACHE);
	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
	MAP_NOCACHE);
	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	const u32 mask = QCA956X_RESET_SGMII_ASSERT \| QCA956X_RESET_SGMII;

	writel(BIT(2) \| BIT(0), pregs + QCA956X_PLL_ETH_SGMII_SERDES_REG);

	reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
	vco_fast = SGMII_SERDES_VCO_FAST_GET(reg);
	vco_slow = SGMII_SERDES_VCO_SLOW_GET(reg);

	/* Set resistor calibration from 0000 to 1111 */
	for (i = 0; i < 0x10; i++) {
	reg = (readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) &
	~SGMII_SERDES_RES_CALIBRATION_MASK) \|
	SGMII_SERDES_RES_CALIBRATION_SET(i);
	writel(reg, gregs + QCA956X_GMAC_REG_SGMII_SERDES);

	udelay(50);

	reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
	if (vco_fast != SGMII_SERDES_VCO_FAST_GET(reg) \|\|
	vco_slow != SGMII_SERDES_VCO_SLOW_GET(reg)) {
	if (start_val == 0) {
	start_val = i;
	end_val = i;
	} else {
	end_val = i;
	}
	}
	vco_fast = SGMII_SERDES_VCO_FAST_GET(reg);
	vco_slow = SGMII_SERDES_VCO_SLOW_GET(reg);
	}

	if (start_val == 0)
	rev_sgmii_val = 0x7;
	else
	rev_sgmii_val = (start_val + end_val) >> 1;

	writel((readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) &
	~SGMII_SERDES_RES_CALIBRATION_MASK) \|
	SGMII_SERDES_RES_CALIBRATION_SET(rev_sgmii_val),
	gregs + QCA956X_GMAC_REG_SGMII_SERDES);

	writel(BIT(2) \| BIT(0), pregs + QCA956X_PLL_ETH_SGMII_SERDES_REG);

	reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
	writel(SGMII_SERDES_CDR_BW_SET(3) \| SGMII_SERDES_TX_DR_CTRL_SET(1) \|
	SGMII_SERDES_PLL_BW_SET(1) \| SGMII_SERDES_EN_SIGNAL_DETECT_SET(1) \|
	SGMII_SERDES_FIBER_SDO_SET(1) \| SGMII_SERDES_VCO_REG_SET(3) \| reg,
	gregs + QCA956X_GMAC_REG_SGMII_SERDES);

	setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);
	clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);

	while (!(readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) & BIT(15)))
	/* NOP */;

	return 0;
	}

	static int qca956x_sgmii_setup(void)
	{
	int i;
	u32 s = 0, reg = 0;
	u32 _regs[] = {
	BIT(4), /* HW_RX_125M_N */
	BIT(2), /* RX_125M_N */
	BIT(3), /* TX_125M_N */
	BIT(0), /* RX_CLK_N */
	BIT(1), /* TX_CLK_N */
	};
	void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
	MAP_NOCACHE);

	/* Force sgmii mode */
	writel(BIT(6) \| BIT(15) \| BIT(8), gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
	udelay(10);
	writel(0x2 \| BIT(5) \| (0x2 << 6), gregs + QCA956X_GMAC_REG_SGMII_CONFIG);

	/* SGMII reset sequence sugguest by qca systems team. */
	writel(0, gregs + QCA956X_GMAC_REG_SGMII_RESET);
	for (i = 0; i < ARRAY_SIZE(_regs); i++) {
	reg \|= _regs[i];
	writel(reg, gregs + QCA956X_GMAC_REG_SGMII_RESET);
	}

	writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) & ~BIT(15),
	gregs + QCA956X_GMAC_REG_MR_AN_CTRL);

	/*
	* WARNING: Across resets SGMII link status goes to weird state.
	* if 0xb8070058 (SGMII_DEBUG Register) reads other than 0xf or 0x10
	* for sure we are in bad state.
	* Issue a PHY RESET in MR_AN_CONTROL_ADDRESS to keep going.
	*/
	i = 0;
	s = (readl(gregs + QCA956X_GMAC_REG_SGMII_DEBUG) & 0xff);
	while (!(s == 0xf \|\| s == 0x10)) {
	writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) \| BIT(15),
	gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
	udelay(100);
	writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) & ~BIT(15),
	gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
	if (i++ == 10)
	break;
	s = (readl(gregs + QCA956X_GMAC_REG_SGMII_DEBUG) & 0xff);
	}

	return 0;
	}

	static int qca956x_s17_reset(void)
	{
	void __iomem *regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
	MAP_NOCACHE);
	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	const u32 mask = QCA956X_RESET_SGMII_ASSERT \| QCA956X_RESET_SGMII \|
	QCA956X_RESET_EXTERNAL \| QCA956X_RESET_SGMII_ANALOG \|
	QCA956X_RESET_SWITCH;
	/* Bits(Reserved in datasheet) should be set to 1 */
	const u32 mask_r = QCA956X_RESET_SGMII_ASSERT \| QCA956X_RESET_SGMII \|
	QCA956X_RESET_EXTERNAL;

	setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);
	clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask_r);
	mdelay(1);

	/* Reset s17 switch(GPIO11) SYS_RST_L */
	writel(readl(regs + AR71XX_GPIO_REG_OE) & ~BIT(11),
	regs + AR71XX_GPIO_REG_OE);
	udelay(100);

	writel(readl(regs + AR71XX_GPIO_REG_OUT) & ~BIT(11),
	regs + AR71XX_GPIO_REG_OUT);
	udelay(100);
	writel(readl(regs + AR71XX_GPIO_REG_OUT) \| BIT(11),
	regs + AR71XX_GPIO_REG_OUT);

	return 0;
	}

	static int qca956x_init_mdio(void)
	{
	u32 reg;
	void __iomem *regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
	MAP_NOCACHE);
	void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	const u32 mask = QCA956X_RESET_GE0_MDIO \| QCA956X_RESET_GE0_MAC \|
	QCA956X_RESET_GE1_MDIO \| QCA956X_RESET_GE1_MAC;

	setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);
	clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
	mdelay(1);

	/* GPIO4 as MDI */
	reg = readl(regs + QCA956X_GPIO_REG_IN_ENABLE3);
	reg &= ~(0xff << 16);
	reg \|= (0x4 << 16);
	writel(reg, regs + QCA956X_GPIO_REG_IN_ENABLE3);

	/* GPIO4 as MDO */
	reg = readl(regs + QCA956X_GPIO_REG_OUT_FUNC1);
	reg &= ~0xff;
	reg \|= 0x20;
	writel(reg, regs + QCA956X_GPIO_REG_OUT_FUNC1);

	/* Init MDC(GPIO3) / MDIO(GPIO4) */
	reg = readl(regs + AR71XX_GPIO_REG_OE);
	reg &= ~BIT(4);
	writel(reg, regs + AR71XX_GPIO_REG_OE);
	udelay(100);

	reg = readl(regs + AR71XX_GPIO_REG_OE);
	reg &= ~BIT(3);
	writel(reg, regs + AR71XX_GPIO_REG_OE);
	udelay(100);

	/* GPIO3 as MDI */
	reg = readl(regs + QCA956X_GPIO_REG_OUT_FUNC0);
	reg &= ~(0xff << 24);
	reg \|= (0x21 << 24);
	writel(reg, regs + QCA956X_GPIO_REG_OUT_FUNC0);

	return 0;
	}

	static int eth_init_qca956x(void)
	{
	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
	MAP_NOCACHE);
	void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
	MAP_NOCACHE);

	qca956x_sgmii_cal();
	qca956x_s17_reset();
	qca956x_init_mdio();

	if (ath79_get_bootstrap() & QCA956X_BOOTSTRAP_REF_CLK_40)
	writel(0x45500, pregs + QCA956X_PLL_SWITCH_CLK_CTRL_REG);
	else
	writel(0xc5200, pregs + QCA956X_PLL_SWITCH_CLK_CTRL_REG);

	qca956x_sgmii_setup();

	writel((3 << 16) \| (3 << 14) \| (1 << 0) \| (1 << 6),
	gregs + QCA956X_GMAC_REG_ETH_CFG);

	writel((1 << 31) \| (2 << 28) \| (2 << 26) \| (1 << 25),
	pregs + QCA956X_PLL_ETH_XMII_CTRL_REG);
	mdelay(1);

	return 0;
	}

	int ath79_eth_reset(void)
	{
	/*
	* Un-reset ethernet. DM still doesn't have any notion of reset
	* framework, so we do it by hand here.
	*/
	if (soc_is_ar933x())
	return eth_init_ar933x();
	if (soc_is_ar934x())
	return eth_init_ar934x();
	if (soc_is_qca953x())
	return eth_init_qca953x();
	if (soc_is_qca956x())
	return eth_init_qca956x();

	return -EINVAL;
	}

	static int usb_reset_ar933x(void __iomem *reset_regs)
	{
	/* Ungate the USB block */
	setbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
	AR933X_RESET_USBSUS_OVERRIDE);
	mdelay(1);
	clrbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
	AR933X_RESET_USB_HOST);
	mdelay(1);
	clrbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
	AR933X_RESET_USB_PHY);
	mdelay(1);

	return 0;
	}

	static int usb_reset_ar934x(void __iomem *reset_regs)
	{
	/* Ungate the USB block */
	setbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
	AR934X_RESET_USBSUS_OVERRIDE);
	mdelay(1);
	clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
	AR934X_RESET_USB_PHY);
	mdelay(1);
	clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
	AR934X_RESET_USB_PHY_ANALOG);
	mdelay(1);
	clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
	AR934X_RESET_USB_HOST);
	mdelay(1);

	return 0;
	}

	static int usb_reset_qca953x(void __iomem *reset_regs)
	{
	void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
	MAP_NOCACHE);

	clrsetbits_be32(pregs + QCA953X_PLL_SWITCH_CLOCK_CONTROL_REG,
	0xf00, 0x200);
	mdelay(10);

	/* Ungate the USB block */
	setbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
	QCA953X_RESET_USBSUS_OVERRIDE);
	mdelay(1);
	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
	QCA953X_RESET_USB_PHY);
	mdelay(1);
	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
	QCA953X_RESET_USB_PHY_ANALOG);
	mdelay(1);
	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
	QCA953X_RESET_USB_HOST);
	mdelay(1);
	clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
	QCA953X_RESET_USB_PHY_PLL_PWD_EXT);
	mdelay(1);

	return 0;
	}

	int ath79_usb_reset(void)
	{
	void __iomem *usbc_regs = map_physmem(AR71XX_USB_CTRL_BASE,
	AR71XX_USB_CTRL_SIZE,
	MAP_NOCACHE);
	void __iomem *reset_regs = map_physmem(AR71XX_RESET_BASE,
	AR71XX_RESET_SIZE,
	MAP_NOCACHE);
	/*
	* Turn on the Buff and Desc swap bits.
	* NOTE: This write into an undocumented register in mandatory to
	* get the USB controller operational in BigEndian mode.
	*/
	writel(0xf0000, usbc_regs + AR71XX_USB_CTRL_REG_CONFIG);

	if (soc_is_ar933x())
	return usb_reset_ar933x(reset_regs);
	if (soc_is_ar934x())
	return usb_reset_ar934x(reset_regs);
	if (soc_is_qca953x())
	return usb_reset_qca953x(reset_regs);

	return -EINVAL;
	}