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1// SPDX-License-Identifier: GPL-2.0+2/* Copyright (C) 2021 Maxlinear Corporation3 * Copyright (C) 2020 Intel Corporation4 *5 * Drivers for Maxlinear Ethernet GPY6 *7 */8 9#include <linux/module.h>10#include <linux/bitfield.h>11#include <linux/hwmon.h>12#include <linux/mutex.h>13#include <linux/phy.h>14#include <linux/polynomial.h>15#include <linux/property.h>16#include <linux/netdevice.h>17 18/* PHY ID */19#define PHY_ID_GPYx15B_MASK	0xFFFFFFFC20#define PHY_ID_GPY21xB_MASK	0xFFFFFFF921#define PHY_ID_GPY2xx		0x67C9DC0022#define PHY_ID_GPY115B		0x67C9DF0023#define PHY_ID_GPY115C		0x67C9DF1024#define PHY_ID_GPY211B		0x67C9DE0825#define PHY_ID_GPY211C		0x67C9DE1026#define PHY_ID_GPY212B		0x67C9DE0927#define PHY_ID_GPY212C		0x67C9DE2028#define PHY_ID_GPY215B		0x67C9DF0429#define PHY_ID_GPY215C		0x67C9DF2030#define PHY_ID_GPY241B		0x67C9DE4031#define PHY_ID_GPY241BM		0x67C9DE8032#define PHY_ID_GPY245B		0x67C9DEC033 34#define PHY_CTL1		0x1335#define PHY_CTL1_MDICD		BIT(3)36#define PHY_CTL1_MDIAB		BIT(2)37#define PHY_CTL1_AMDIX		BIT(0)38#define PHY_MIISTAT		0x18	/* MII state */39#define PHY_IMASK		0x19	/* interrupt mask */40#define PHY_ISTAT		0x1A	/* interrupt status */41#define PHY_FWV			0x1E	/* firmware version */42 43#define PHY_MIISTAT_SPD_MASK	GENMASK(2, 0)44#define PHY_MIISTAT_DPX		BIT(3)45#define PHY_MIISTAT_LS		BIT(10)46 47#define PHY_MIISTAT_SPD_10	048#define PHY_MIISTAT_SPD_100	149#define PHY_MIISTAT_SPD_1000	250#define PHY_MIISTAT_SPD_2500	451 52#define PHY_IMASK_WOL		BIT(15)	/* Wake-on-LAN */53#define PHY_IMASK_ANC		BIT(10)	/* Auto-Neg complete */54#define PHY_IMASK_ADSC		BIT(5)	/* Link auto-downspeed detect */55#define PHY_IMASK_DXMC		BIT(2)	/* Duplex mode change */56#define PHY_IMASK_LSPC		BIT(1)	/* Link speed change */57#define PHY_IMASK_LSTC		BIT(0)	/* Link state change */58#define PHY_IMASK_MASK		(PHY_IMASK_LSTC | \59				 PHY_IMASK_LSPC | \60				 PHY_IMASK_DXMC | \61				 PHY_IMASK_ADSC | \62				 PHY_IMASK_ANC)63 64#define PHY_FWV_REL_MASK	BIT(15)65#define PHY_FWV_MAJOR_MASK	GENMASK(11, 8)66#define PHY_FWV_MINOR_MASK	GENMASK(7, 0)67 68#define PHY_PMA_MGBT_POLARITY	0x8269#define PHY_MDI_MDI_X_MASK	GENMASK(1, 0)70#define PHY_MDI_MDI_X_NORMAL	0x371#define PHY_MDI_MDI_X_AB	0x272#define PHY_MDI_MDI_X_CD	0x173#define PHY_MDI_MDI_X_CROSS	0x074 75/* SGMII */76#define VSPEC1_SGMII_CTRL	0x0877#define VSPEC1_SGMII_CTRL_ANEN	BIT(12)		/* Aneg enable */78#define VSPEC1_SGMII_CTRL_ANRS	BIT(9)		/* Restart Aneg */79#define VSPEC1_SGMII_ANEN_ANRS	(VSPEC1_SGMII_CTRL_ANEN | \80				 VSPEC1_SGMII_CTRL_ANRS)81 82/* Temperature sensor */83#define VSPEC1_TEMP_STA	0x0E84#define VSPEC1_TEMP_STA_DATA	GENMASK(9, 0)85 86/* Mailbox */87#define VSPEC1_MBOX_DATA	0x588#define VSPEC1_MBOX_ADDRLO	0x689#define VSPEC1_MBOX_CMD		0x790#define VSPEC1_MBOX_CMD_ADDRHI	GENMASK(7, 0)91#define VSPEC1_MBOX_CMD_RD	(0 << 8)92#define VSPEC1_MBOX_CMD_READY	BIT(15)93 94/* WoL */95#define VPSPEC2_WOL_CTL		0x0E0696#define VPSPEC2_WOL_AD01	0x0E0897#define VPSPEC2_WOL_AD23	0x0E0998#define VPSPEC2_WOL_AD45	0x0E0A99#define WOL_EN			BIT(0)100 101/* Internal registers, access via mbox */102#define REG_GPIO0_OUT		0xd3ce00103 104struct gpy_priv {105	/* serialize mailbox acesses */106	struct mutex mbox_lock;107 108	u8 fw_major;109	u8 fw_minor;110	u32 wolopts;111 112	/* It takes 3 seconds to fully switch out of loopback mode before113	 * it can safely re-enter loopback mode. Record the time when114	 * loopback is disabled. Check and wait if necessary before loopback115	 * is enabled.116	 */117	u64 lb_dis_to;118};119 120static const struct {121	int major;122	int minor;123} ver_need_sgmii_reaneg[] = {124	{7, 0x6D},125	{8, 0x6D},126	{9, 0x73},127};128 129#if IS_ENABLED(CONFIG_HWMON)130/* The original translation formulae of the temperature (in degrees of Celsius)131 * are as follows:132 *133 *   T = -2.5761e-11*(N^4) + 9.7332e-8*(N^3) + -1.9165e-4*(N^2) +134 *       3.0762e-1*(N^1) + -5.2156e1135 *136 * where [-52.156, 137.961]C and N = [0, 1023].137 *138 * They must be accordingly altered to be suitable for the integer arithmetics.139 * The technique is called 'factor redistribution', which just makes sure the140 * multiplications and divisions are made so to have a result of the operations141 * within the integer numbers limit. In addition we need to translate the142 * formulae to accept millidegrees of Celsius. Here what it looks like after143 * the alterations:144 *145 *   T = -25761e-12*(N^4) + 97332e-9*(N^3) + -191650e-6*(N^2) +146 *       307620e-3*(N^1) + -52156147 *148 * where T = [-52156, 137961]mC and N = [0, 1023].149 */150static const struct polynomial poly_N_to_temp = {151	.terms = {152		{4,  -25761, 1000, 1},153		{3,   97332, 1000, 1},154		{2, -191650, 1000, 1},155		{1,  307620, 1000, 1},156		{0,  -52156,    1, 1}157	}158};159 160static int gpy_hwmon_read(struct device *dev,161			  enum hwmon_sensor_types type,162			  u32 attr, int channel, long *value)163{164	struct phy_device *phydev = dev_get_drvdata(dev);165	int ret;166 167	ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_TEMP_STA);168	if (ret < 0)169		return ret;170	if (!ret)171		return -ENODATA;172 173	*value = polynomial_calc(&poly_N_to_temp,174				 FIELD_GET(VSPEC1_TEMP_STA_DATA, ret));175 176	return 0;177}178 179static umode_t gpy_hwmon_is_visible(const void *data,180				    enum hwmon_sensor_types type,181				    u32 attr, int channel)182{183	return 0444;184}185 186static const struct hwmon_channel_info * const gpy_hwmon_info[] = {187	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),188	NULL189};190 191static const struct hwmon_ops gpy_hwmon_hwmon_ops = {192	.is_visible	= gpy_hwmon_is_visible,193	.read		= gpy_hwmon_read,194};195 196static const struct hwmon_chip_info gpy_hwmon_chip_info = {197	.ops		= &gpy_hwmon_hwmon_ops,198	.info		= gpy_hwmon_info,199};200 201static int gpy_hwmon_register(struct phy_device *phydev)202{203	struct device *dev = &phydev->mdio.dev;204	struct device *hwmon_dev;205	char *hwmon_name;206 207	hwmon_name = devm_hwmon_sanitize_name(dev, dev_name(dev));208	if (IS_ERR(hwmon_name))209		return PTR_ERR(hwmon_name);210 211	hwmon_dev = devm_hwmon_device_register_with_info(dev, hwmon_name,212							 phydev,213							 &gpy_hwmon_chip_info,214							 NULL);215 216	return PTR_ERR_OR_ZERO(hwmon_dev);217}218#else219static int gpy_hwmon_register(struct phy_device *phydev)220{221	return 0;222}223#endif224 225static int gpy_ack_interrupt(struct phy_device *phydev)226{227	int ret;228 229	/* Clear all pending interrupts */230	ret = phy_read(phydev, PHY_ISTAT);231	return ret < 0 ? ret : 0;232}233 234static int gpy_mbox_read(struct phy_device *phydev, u32 addr)235{236	struct gpy_priv *priv = phydev->priv;237	int val, ret;238	u16 cmd;239 240	mutex_lock(&priv->mbox_lock);241 242	ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_MBOX_ADDRLO,243			    addr);244	if (ret)245		goto out;246 247	cmd = VSPEC1_MBOX_CMD_RD;248	cmd |= FIELD_PREP(VSPEC1_MBOX_CMD_ADDRHI, addr >> 16);249 250	ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_MBOX_CMD, cmd);251	if (ret)252		goto out;253 254	/* The mbox read is used in the interrupt workaround. It was observed255	 * that a read might take up to 2.5ms. This is also the time for which256	 * the interrupt line is stuck low. To be on the safe side, poll the257	 * ready bit for 10ms.258	 */259	ret = phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1,260					VSPEC1_MBOX_CMD, val,261					(val & VSPEC1_MBOX_CMD_READY),262					500, 10000, false);263	if (ret)264		goto out;265 266	ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_MBOX_DATA);267 268out:269	mutex_unlock(&priv->mbox_lock);270	return ret;271}272 273static int gpy_config_init(struct phy_device *phydev)274{275	/* Nothing to configure. Configuration Requirement Placeholder */276	return 0;277}278 279static int gpy21x_config_init(struct phy_device *phydev)280{281	__set_bit(PHY_INTERFACE_MODE_2500BASEX, phydev->possible_interfaces);282	__set_bit(PHY_INTERFACE_MODE_SGMII, phydev->possible_interfaces);283 284	return gpy_config_init(phydev);285}286 287static int gpy_probe(struct phy_device *phydev)288{289	struct device *dev = &phydev->mdio.dev;290	struct gpy_priv *priv;291	int fw_version;292	int ret;293 294	if (!phydev->is_c45) {295		ret = phy_get_c45_ids(phydev);296		if (ret < 0)297			return ret;298	}299 300	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);301	if (!priv)302		return -ENOMEM;303	phydev->priv = priv;304	mutex_init(&priv->mbox_lock);305 306	if (!device_property_present(dev, "maxlinear,use-broken-interrupts"))307		phydev->dev_flags |= PHY_F_NO_IRQ;308 309	fw_version = phy_read(phydev, PHY_FWV);310	if (fw_version < 0)311		return fw_version;312	priv->fw_major = FIELD_GET(PHY_FWV_MAJOR_MASK, fw_version);313	priv->fw_minor = FIELD_GET(PHY_FWV_MINOR_MASK, fw_version);314 315	ret = gpy_hwmon_register(phydev);316	if (ret)317		return ret;318 319	/* Show GPY PHY FW version in dmesg */320	phydev_info(phydev, "Firmware Version: %d.%d (0x%04X%s)\n",321		    priv->fw_major, priv->fw_minor, fw_version,322		    fw_version & PHY_FWV_REL_MASK ? "" : " test version");323 324	return 0;325}326 327static bool gpy_sgmii_need_reaneg(struct phy_device *phydev)328{329	struct gpy_priv *priv = phydev->priv;330	size_t i;331 332	for (i = 0; i < ARRAY_SIZE(ver_need_sgmii_reaneg); i++) {333		if (priv->fw_major != ver_need_sgmii_reaneg[i].major)334			continue;335		if (priv->fw_minor < ver_need_sgmii_reaneg[i].minor)336			return true;337		break;338	}339 340	return false;341}342 343static bool gpy_2500basex_chk(struct phy_device *phydev)344{345	int ret;346 347	ret = phy_read(phydev, PHY_MIISTAT);348	if (ret < 0) {349		phydev_err(phydev, "Error: MDIO register access failed: %d\n",350			   ret);351		return false;352	}353 354	if (!(ret & PHY_MIISTAT_LS) ||355	    FIELD_GET(PHY_MIISTAT_SPD_MASK, ret) != PHY_MIISTAT_SPD_2500)356		return false;357 358	phydev->speed = SPEED_2500;359	phydev->interface = PHY_INTERFACE_MODE_2500BASEX;360	phy_modify_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL,361		       VSPEC1_SGMII_CTRL_ANEN, 0);362	return true;363}364 365static bool gpy_sgmii_aneg_en(struct phy_device *phydev)366{367	int ret;368 369	ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL);370	if (ret < 0) {371		phydev_err(phydev, "Error: MMD register access failed: %d\n",372			   ret);373		return true;374	}375 376	return (ret & VSPEC1_SGMII_CTRL_ANEN) ? true : false;377}378 379static int gpy_config_mdix(struct phy_device *phydev, u8 ctrl)380{381	int ret;382	u16 val;383 384	switch (ctrl) {385	case ETH_TP_MDI_AUTO:386		val = PHY_CTL1_AMDIX;387		break;388	case ETH_TP_MDI_X:389		val = (PHY_CTL1_MDIAB | PHY_CTL1_MDICD);390		break;391	case ETH_TP_MDI:392		val = 0;393		break;394	default:395		return 0;396	}397 398	ret =  phy_modify(phydev, PHY_CTL1, PHY_CTL1_AMDIX | PHY_CTL1_MDIAB |399			  PHY_CTL1_MDICD, val);400	if (ret < 0)401		return ret;402 403	return genphy_c45_restart_aneg(phydev);404}405 406static int gpy_config_aneg(struct phy_device *phydev)407{408	bool changed = false;409	u32 adv;410	int ret;411 412	if (phydev->autoneg == AUTONEG_DISABLE) {413		/* Configure half duplex with genphy_setup_forced,414		 * because genphy_c45_pma_setup_forced does not support.415		 */416		return phydev->duplex != DUPLEX_FULL417			? genphy_setup_forced(phydev)418			: genphy_c45_pma_setup_forced(phydev);419	}420 421	ret = gpy_config_mdix(phydev,  phydev->mdix_ctrl);422	if (ret < 0)423		return ret;424 425	ret = genphy_c45_an_config_aneg(phydev);426	if (ret < 0)427		return ret;428	if (ret > 0)429		changed = true;430 431	adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);432	ret = phy_modify_changed(phydev, MII_CTRL1000,433				 ADVERTISE_1000FULL | ADVERTISE_1000HALF,434				 adv);435	if (ret < 0)436		return ret;437	if (ret > 0)438		changed = true;439 440	ret = genphy_c45_check_and_restart_aneg(phydev, changed);441	if (ret < 0)442		return ret;443 444	if (phydev->interface == PHY_INTERFACE_MODE_USXGMII ||445	    phydev->interface == PHY_INTERFACE_MODE_INTERNAL)446		return 0;447 448	/* No need to trigger re-ANEG if link speed is 2.5G or SGMII ANEG is449	 * disabled.450	 */451	if (!gpy_sgmii_need_reaneg(phydev) || gpy_2500basex_chk(phydev) ||452	    !gpy_sgmii_aneg_en(phydev))453		return 0;454 455	/* There is a design constraint in GPY2xx device where SGMII AN is456	 * only triggered when there is change of speed. If, PHY link457	 * partner`s speed is still same even after PHY TPI is down and up458	 * again, SGMII AN is not triggered and hence no new in-band message459	 * from GPY to MAC side SGMII.460	 * This could cause an issue during power up, when PHY is up prior to461	 * MAC. At this condition, once MAC side SGMII is up, MAC side SGMII462	 * wouldn`t receive new in-band message from GPY with correct link463	 * status, speed and duplex info.464	 *465	 * 1) If PHY is already up and TPI link status is still down (such as466	 *    hard reboot), TPI link status is polled for 4 seconds before467	 *    retriggerring SGMII AN.468	 * 2) If PHY is already up and TPI link status is also up (such as soft469	 *    reboot), polling of TPI link status is not needed and SGMII AN is470	 *    immediately retriggered.471	 * 3) Other conditions such as PHY is down, speed change etc, skip472	 *    retriggering SGMII AN. Note: in case of speed change, GPY FW will473	 *    initiate SGMII AN.474	 */475 476	if (phydev->state != PHY_UP)477		return 0;478 479	ret = phy_read_poll_timeout(phydev, MII_BMSR, ret, ret & BMSR_LSTATUS,480				    20000, 4000000, false);481	if (ret == -ETIMEDOUT)482		return 0;483	else if (ret < 0)484		return ret;485 486	/* Trigger SGMII AN. */487	return phy_modify_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL,488			      VSPEC1_SGMII_CTRL_ANRS, VSPEC1_SGMII_CTRL_ANRS);489}490 491static int gpy_update_mdix(struct phy_device *phydev)492{493	int ret;494 495	ret = phy_read(phydev, PHY_CTL1);496	if (ret < 0)497		return ret;498 499	if (ret & PHY_CTL1_AMDIX)500		phydev->mdix_ctrl = ETH_TP_MDI_AUTO;501	else502		if (ret & PHY_CTL1_MDICD || ret & PHY_CTL1_MDIAB)503			phydev->mdix_ctrl = ETH_TP_MDI_X;504		else505			phydev->mdix_ctrl = ETH_TP_MDI;506 507	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, PHY_PMA_MGBT_POLARITY);508	if (ret < 0)509		return ret;510 511	if ((ret & PHY_MDI_MDI_X_MASK) < PHY_MDI_MDI_X_NORMAL)512		phydev->mdix = ETH_TP_MDI_X;513	else514		phydev->mdix = ETH_TP_MDI;515 516	return 0;517}518 519static int gpy_update_interface(struct phy_device *phydev)520{521	int ret;522 523	/* Interface mode is fixed for USXGMII and integrated PHY */524	if (phydev->interface == PHY_INTERFACE_MODE_USXGMII ||525	    phydev->interface == PHY_INTERFACE_MODE_INTERNAL)526		return -EINVAL;527 528	/* Automatically switch SERDES interface between SGMII and 2500-BaseX529	 * according to speed. Disable ANEG in 2500-BaseX mode.530	 */531	switch (phydev->speed) {532	case SPEED_2500:533		phydev->interface = PHY_INTERFACE_MODE_2500BASEX;534		ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL,535				     VSPEC1_SGMII_CTRL_ANEN, 0);536		if (ret < 0) {537			phydev_err(phydev,538				   "Error: Disable of SGMII ANEG failed: %d\n",539				   ret);540			return ret;541		}542		break;543	case SPEED_1000:544	case SPEED_100:545	case SPEED_10:546		phydev->interface = PHY_INTERFACE_MODE_SGMII;547		if (gpy_sgmii_aneg_en(phydev))548			break;549		/* Enable and restart SGMII ANEG for 10/100/1000Mbps link speed550		 * if ANEG is disabled (in 2500-BaseX mode).551		 */552		ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, VSPEC1_SGMII_CTRL,553				     VSPEC1_SGMII_ANEN_ANRS,554				     VSPEC1_SGMII_ANEN_ANRS);555		if (ret < 0) {556			phydev_err(phydev,557				   "Error: Enable of SGMII ANEG failed: %d\n",558				   ret);559			return ret;560		}561		break;562	}563 564	if (phydev->speed == SPEED_2500 || phydev->speed == SPEED_1000) {565		ret = genphy_read_master_slave(phydev);566		if (ret < 0)567			return ret;568	}569 570	return gpy_update_mdix(phydev);571}572 573static int gpy_read_status(struct phy_device *phydev)574{575	int ret;576 577	ret = genphy_update_link(phydev);578	if (ret)579		return ret;580 581	phydev->speed = SPEED_UNKNOWN;582	phydev->duplex = DUPLEX_UNKNOWN;583	phydev->pause = 0;584	phydev->asym_pause = 0;585 586	if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {587		ret = genphy_c45_read_lpa(phydev);588		if (ret < 0)589			return ret;590 591		/* Read the link partner's 1G advertisement */592		ret = phy_read(phydev, MII_STAT1000);593		if (ret < 0)594			return ret;595		mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, ret);596	} else if (phydev->autoneg == AUTONEG_DISABLE) {597		linkmode_zero(phydev->lp_advertising);598	}599 600	ret = phy_read(phydev, PHY_MIISTAT);601	if (ret < 0)602		return ret;603 604	phydev->link = (ret & PHY_MIISTAT_LS) ? 1 : 0;605	phydev->duplex = (ret & PHY_MIISTAT_DPX) ? DUPLEX_FULL : DUPLEX_HALF;606	switch (FIELD_GET(PHY_MIISTAT_SPD_MASK, ret)) {607	case PHY_MIISTAT_SPD_10:608		phydev->speed = SPEED_10;609		break;610	case PHY_MIISTAT_SPD_100:611		phydev->speed = SPEED_100;612		break;613	case PHY_MIISTAT_SPD_1000:614		phydev->speed = SPEED_1000;615		break;616	case PHY_MIISTAT_SPD_2500:617		phydev->speed = SPEED_2500;618		break;619	}620 621	if (phydev->link) {622		ret = gpy_update_interface(phydev);623		if (ret < 0)624			return ret;625	}626 627	return 0;628}629 630static int gpy_config_intr(struct phy_device *phydev)631{632	struct gpy_priv *priv = phydev->priv;633	u16 mask = 0;634	int ret;635 636	ret = gpy_ack_interrupt(phydev);637	if (ret)638		return ret;639 640	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)641		mask = PHY_IMASK_MASK;642 643	if (priv->wolopts & WAKE_MAGIC)644		mask |= PHY_IMASK_WOL;645 646	if (priv->wolopts & WAKE_PHY)647		mask |= PHY_IMASK_LSTC;648 649	return phy_write(phydev, PHY_IMASK, mask);650}651 652static irqreturn_t gpy_handle_interrupt(struct phy_device *phydev)653{654	int reg;655 656	reg = phy_read(phydev, PHY_ISTAT);657	if (reg < 0) {658		phy_error(phydev);659		return IRQ_NONE;660	}661 662	if (!(reg & PHY_IMASK_MASK))663		return IRQ_NONE;664 665	/* The PHY might leave the interrupt line asserted even after PHY_ISTAT666	 * is read. To avoid interrupt storms, delay the interrupt handling as667	 * long as the PHY drives the interrupt line. An internal bus read will668	 * stall as long as the interrupt line is asserted, thus just read a669	 * random register here.670	 * Because we cannot access the internal bus at all while the interrupt671	 * is driven by the PHY, there is no way to make the interrupt line672	 * unstuck (e.g. by changing the pinmux to GPIO input) during that time673	 * frame. Therefore, polling is the best we can do and won't do any more674	 * harm.675	 * It was observed that this bug happens on link state and link speed676	 * changes independent of the firmware version.677	 */678	if (reg & (PHY_IMASK_LSTC | PHY_IMASK_LSPC)) {679		reg = gpy_mbox_read(phydev, REG_GPIO0_OUT);680		if (reg < 0) {681			phy_error(phydev);682			return IRQ_NONE;683		}684	}685 686	phy_trigger_machine(phydev);687 688	return IRQ_HANDLED;689}690 691static int gpy_set_wol(struct phy_device *phydev,692		       struct ethtool_wolinfo *wol)693{694	struct net_device *attach_dev = phydev->attached_dev;695	struct gpy_priv *priv = phydev->priv;696	int ret;697 698	if (wol->wolopts & WAKE_MAGIC) {699		/* MAC address - Byte0:Byte1:Byte2:Byte3:Byte4:Byte5700		 * VPSPEC2_WOL_AD45 = Byte0:Byte1701		 * VPSPEC2_WOL_AD23 = Byte2:Byte3702		 * VPSPEC2_WOL_AD01 = Byte4:Byte5703		 */704		ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2,705				       VPSPEC2_WOL_AD45,706				       ((attach_dev->dev_addr[0] << 8) |707				       attach_dev->dev_addr[1]));708		if (ret < 0)709			return ret;710 711		ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2,712				       VPSPEC2_WOL_AD23,713				       ((attach_dev->dev_addr[2] << 8) |714				       attach_dev->dev_addr[3]));715		if (ret < 0)716			return ret;717 718		ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2,719				       VPSPEC2_WOL_AD01,720				       ((attach_dev->dev_addr[4] << 8) |721				       attach_dev->dev_addr[5]));722		if (ret < 0)723			return ret;724 725		/* Enable the WOL interrupt */726		ret = phy_write(phydev, PHY_IMASK, PHY_IMASK_WOL);727		if (ret < 0)728			return ret;729 730		/* Enable magic packet matching */731		ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2,732				       VPSPEC2_WOL_CTL,733				       WOL_EN);734		if (ret < 0)735			return ret;736 737		/* Clear the interrupt status register.738		 * Only WoL is enabled so clear all.739		 */740		ret = phy_read(phydev, PHY_ISTAT);741		if (ret < 0)742			return ret;743 744		priv->wolopts |= WAKE_MAGIC;745	} else {746		/* Disable magic packet matching */747		ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2,748					 VPSPEC2_WOL_CTL,749					 WOL_EN);750		if (ret < 0)751			return ret;752 753		/* Disable the WOL interrupt */754		ret = phy_clear_bits(phydev, PHY_IMASK, PHY_IMASK_WOL);755		if (ret < 0)756			return ret;757 758		priv->wolopts &= ~WAKE_MAGIC;759	}760 761	if (wol->wolopts & WAKE_PHY) {762		/* Enable the link state change interrupt */763		ret = phy_set_bits(phydev, PHY_IMASK, PHY_IMASK_LSTC);764		if (ret < 0)765			return ret;766 767		/* Clear the interrupt status register */768		ret = phy_read(phydev, PHY_ISTAT);769		if (ret < 0)770			return ret;771 772		if (ret & (PHY_IMASK_MASK & ~PHY_IMASK_LSTC))773			phy_trigger_machine(phydev);774 775		priv->wolopts |= WAKE_PHY;776		return 0;777	}778 779	priv->wolopts &= ~WAKE_PHY;780	/* Disable the link state change interrupt */781	return phy_clear_bits(phydev, PHY_IMASK, PHY_IMASK_LSTC);782}783 784static void gpy_get_wol(struct phy_device *phydev,785			struct ethtool_wolinfo *wol)786{787	struct gpy_priv *priv = phydev->priv;788 789	wol->supported = WAKE_MAGIC | WAKE_PHY;790	wol->wolopts = priv->wolopts;791}792 793static int gpy_loopback(struct phy_device *phydev, bool enable)794{795	struct gpy_priv *priv = phydev->priv;796	u16 set = 0;797	int ret;798 799	if (enable) {800		u64 now = get_jiffies_64();801 802		/* wait until 3 seconds from last disable */803		if (time_before64(now, priv->lb_dis_to))804			msleep(jiffies64_to_msecs(priv->lb_dis_to - now));805 806		set = BMCR_LOOPBACK;807	}808 809	ret = phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, set);810	if (ret <= 0)811		return ret;812 813	if (enable) {814		/* It takes some time for PHY device to switch into815		 * loopback mode.816		 */817		msleep(100);818	} else {819		priv->lb_dis_to = get_jiffies_64() + HZ * 3;820	}821 822	return 0;823}824 825static int gpy115_loopback(struct phy_device *phydev, bool enable)826{827	struct gpy_priv *priv = phydev->priv;828 829	if (enable)830		return gpy_loopback(phydev, enable);831 832	if (priv->fw_minor > 0x76)833		return gpy_loopback(phydev, 0);834 835	return genphy_soft_reset(phydev);836}837 838static struct phy_driver gpy_drivers[] = {839	{840		PHY_ID_MATCH_MODEL(PHY_ID_GPY2xx),841		.name		= "Maxlinear Ethernet GPY2xx",842		.get_features	= genphy_c45_pma_read_abilities,843		.config_init	= gpy_config_init,844		.probe		= gpy_probe,845		.suspend	= genphy_suspend,846		.resume		= genphy_resume,847		.config_aneg	= gpy_config_aneg,848		.aneg_done	= genphy_c45_aneg_done,849		.read_status	= gpy_read_status,850		.config_intr	= gpy_config_intr,851		.handle_interrupt = gpy_handle_interrupt,852		.set_wol	= gpy_set_wol,853		.get_wol	= gpy_get_wol,854		.set_loopback	= gpy_loopback,855	},856	{857		.phy_id		= PHY_ID_GPY115B,858		.phy_id_mask	= PHY_ID_GPYx15B_MASK,859		.name		= "Maxlinear Ethernet GPY115B",860		.get_features	= genphy_c45_pma_read_abilities,861		.config_init	= gpy_config_init,862		.probe		= gpy_probe,863		.suspend	= genphy_suspend,864		.resume		= genphy_resume,865		.config_aneg	= gpy_config_aneg,866		.aneg_done	= genphy_c45_aneg_done,867		.read_status	= gpy_read_status,868		.config_intr	= gpy_config_intr,869		.handle_interrupt = gpy_handle_interrupt,870		.set_wol	= gpy_set_wol,871		.get_wol	= gpy_get_wol,872		.set_loopback	= gpy115_loopback,873	},874	{875		PHY_ID_MATCH_MODEL(PHY_ID_GPY115C),876		.name		= "Maxlinear Ethernet GPY115C",877		.get_features	= genphy_c45_pma_read_abilities,878		.config_init	= gpy_config_init,879		.probe		= gpy_probe,880		.suspend	= genphy_suspend,881		.resume		= genphy_resume,882		.config_aneg	= gpy_config_aneg,883		.aneg_done	= genphy_c45_aneg_done,884		.read_status	= gpy_read_status,885		.config_intr	= gpy_config_intr,886		.handle_interrupt = gpy_handle_interrupt,887		.set_wol	= gpy_set_wol,888		.get_wol	= gpy_get_wol,889		.set_loopback	= gpy115_loopback,890	},891	{892		.phy_id		= PHY_ID_GPY211B,893		.phy_id_mask	= PHY_ID_GPY21xB_MASK,894		.name		= "Maxlinear Ethernet GPY211B",895		.get_features	= genphy_c45_pma_read_abilities,896		.config_init	= gpy21x_config_init,897		.probe		= gpy_probe,898		.suspend	= genphy_suspend,899		.resume		= genphy_resume,900		.config_aneg	= gpy_config_aneg,901		.aneg_done	= genphy_c45_aneg_done,902		.read_status	= gpy_read_status,903		.config_intr	= gpy_config_intr,904		.handle_interrupt = gpy_handle_interrupt,905		.set_wol	= gpy_set_wol,906		.get_wol	= gpy_get_wol,907		.set_loopback	= gpy_loopback,908	},909	{910		PHY_ID_MATCH_MODEL(PHY_ID_GPY211C),911		.name		= "Maxlinear Ethernet GPY211C",912		.get_features	= genphy_c45_pma_read_abilities,913		.config_init	= gpy21x_config_init,914		.probe		= gpy_probe,915		.suspend	= genphy_suspend,916		.resume		= genphy_resume,917		.config_aneg	= gpy_config_aneg,918		.aneg_done	= genphy_c45_aneg_done,919		.read_status	= gpy_read_status,920		.config_intr	= gpy_config_intr,921		.handle_interrupt = gpy_handle_interrupt,922		.set_wol	= gpy_set_wol,923		.get_wol	= gpy_get_wol,924		.set_loopback	= gpy_loopback,925	},926	{927		.phy_id		= PHY_ID_GPY212B,928		.phy_id_mask	= PHY_ID_GPY21xB_MASK,929		.name		= "Maxlinear Ethernet GPY212B",930		.get_features	= genphy_c45_pma_read_abilities,931		.config_init	= gpy21x_config_init,932		.probe		= gpy_probe,933		.suspend	= genphy_suspend,934		.resume		= genphy_resume,935		.config_aneg	= gpy_config_aneg,936		.aneg_done	= genphy_c45_aneg_done,937		.read_status	= gpy_read_status,938		.config_intr	= gpy_config_intr,939		.handle_interrupt = gpy_handle_interrupt,940		.set_wol	= gpy_set_wol,941		.get_wol	= gpy_get_wol,942		.set_loopback	= gpy_loopback,943	},944	{945		PHY_ID_MATCH_MODEL(PHY_ID_GPY212C),946		.name		= "Maxlinear Ethernet GPY212C",947		.get_features	= genphy_c45_pma_read_abilities,948		.config_init	= gpy21x_config_init,949		.probe		= gpy_probe,950		.suspend	= genphy_suspend,951		.resume		= genphy_resume,952		.config_aneg	= gpy_config_aneg,953		.aneg_done	= genphy_c45_aneg_done,954		.read_status	= gpy_read_status,955		.config_intr	= gpy_config_intr,956		.handle_interrupt = gpy_handle_interrupt,957		.set_wol	= gpy_set_wol,958		.get_wol	= gpy_get_wol,959		.set_loopback	= gpy_loopback,960	},961	{962		.phy_id		= PHY_ID_GPY215B,963		.phy_id_mask	= PHY_ID_GPYx15B_MASK,964		.name		= "Maxlinear Ethernet GPY215B",965		.get_features	= genphy_c45_pma_read_abilities,966		.config_init	= gpy21x_config_init,967		.probe		= gpy_probe,968		.suspend	= genphy_suspend,969		.resume		= genphy_resume,970		.config_aneg	= gpy_config_aneg,971		.aneg_done	= genphy_c45_aneg_done,972		.read_status	= gpy_read_status,973		.config_intr	= gpy_config_intr,974		.handle_interrupt = gpy_handle_interrupt,975		.set_wol	= gpy_set_wol,976		.get_wol	= gpy_get_wol,977		.set_loopback	= gpy_loopback,978	},979	{980		PHY_ID_MATCH_MODEL(PHY_ID_GPY215C),981		.name		= "Maxlinear Ethernet GPY215C",982		.get_features	= genphy_c45_pma_read_abilities,983		.config_init	= gpy21x_config_init,984		.probe		= gpy_probe,985		.suspend	= genphy_suspend,986		.resume		= genphy_resume,987		.config_aneg	= gpy_config_aneg,988		.aneg_done	= genphy_c45_aneg_done,989		.read_status	= gpy_read_status,990		.config_intr	= gpy_config_intr,991		.handle_interrupt = gpy_handle_interrupt,992		.set_wol	= gpy_set_wol,993		.get_wol	= gpy_get_wol,994		.set_loopback	= gpy_loopback,995	},996	{997		PHY_ID_MATCH_MODEL(PHY_ID_GPY241B),998		.name		= "Maxlinear Ethernet GPY241B",999		.get_features	= genphy_c45_pma_read_abilities,1000		.config_init	= gpy_config_init,1001		.probe		= gpy_probe,1002		.suspend	= genphy_suspend,1003		.resume		= genphy_resume,1004		.config_aneg	= gpy_config_aneg,1005		.aneg_done	= genphy_c45_aneg_done,1006		.read_status	= gpy_read_status,1007		.config_intr	= gpy_config_intr,1008		.handle_interrupt = gpy_handle_interrupt,1009		.set_wol	= gpy_set_wol,1010		.get_wol	= gpy_get_wol,1011		.set_loopback	= gpy_loopback,1012	},1013	{1014		PHY_ID_MATCH_MODEL(PHY_ID_GPY241BM),1015		.name		= "Maxlinear Ethernet GPY241BM",1016		.get_features	= genphy_c45_pma_read_abilities,1017		.config_init	= gpy_config_init,1018		.probe		= gpy_probe,1019		.suspend	= genphy_suspend,1020		.resume		= genphy_resume,1021		.config_aneg	= gpy_config_aneg,1022		.aneg_done	= genphy_c45_aneg_done,1023		.read_status	= gpy_read_status,1024		.config_intr	= gpy_config_intr,1025		.handle_interrupt = gpy_handle_interrupt,1026		.set_wol	= gpy_set_wol,1027		.get_wol	= gpy_get_wol,1028		.set_loopback	= gpy_loopback,1029	},1030	{1031		PHY_ID_MATCH_MODEL(PHY_ID_GPY245B),1032		.name		= "Maxlinear Ethernet GPY245B",1033		.get_features	= genphy_c45_pma_read_abilities,1034		.config_init	= gpy_config_init,1035		.probe		= gpy_probe,1036		.suspend	= genphy_suspend,1037		.resume		= genphy_resume,1038		.config_aneg	= gpy_config_aneg,1039		.aneg_done	= genphy_c45_aneg_done,1040		.read_status	= gpy_read_status,1041		.config_intr	= gpy_config_intr,1042		.handle_interrupt = gpy_handle_interrupt,1043		.set_wol	= gpy_set_wol,1044		.get_wol	= gpy_get_wol,1045		.set_loopback	= gpy_loopback,1046	},1047};1048module_phy_driver(gpy_drivers);1049 1050static struct mdio_device_id __maybe_unused gpy_tbl[] = {1051	{PHY_ID_MATCH_MODEL(PHY_ID_GPY2xx)},1052	{PHY_ID_GPY115B, PHY_ID_GPYx15B_MASK},1053	{PHY_ID_MATCH_MODEL(PHY_ID_GPY115C)},1054	{PHY_ID_GPY211B, PHY_ID_GPY21xB_MASK},1055	{PHY_ID_MATCH_MODEL(PHY_ID_GPY211C)},1056	{PHY_ID_GPY212B, PHY_ID_GPY21xB_MASK},1057	{PHY_ID_MATCH_MODEL(PHY_ID_GPY212C)},1058	{PHY_ID_GPY215B, PHY_ID_GPYx15B_MASK},1059	{PHY_ID_MATCH_MODEL(PHY_ID_GPY215C)},1060	{PHY_ID_MATCH_MODEL(PHY_ID_GPY241B)},1061	{PHY_ID_MATCH_MODEL(PHY_ID_GPY241BM)},1062	{PHY_ID_MATCH_MODEL(PHY_ID_GPY245B)},1063	{ }1064};1065MODULE_DEVICE_TABLE(mdio, gpy_tbl);1066 1067MODULE_DESCRIPTION("Maxlinear Ethernet GPY Driver");1068MODULE_AUTHOR("Xu Liang");1069MODULE_LICENSE("GPL");1070