1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Broadcom Starfighter 2 DSA switch driver
   4 *
   5 * Copyright (C) 2014, Broadcom Corporation
   6 */
   7
   8#include <linux/list.h>
   9#include <linux/module.h>
  10#include <linux/netdevice.h>
  11#include <linux/interrupt.h>
  12#include <linux/platform_device.h>
  13#include <linux/phy.h>
  14#include <linux/phy_fixed.h>
  15#include <linux/phylink.h>
  16#include <linux/mii.h>
  17#include <linux/clk.h>
  18#include <linux/of.h>
  19#include <linux/of_irq.h>
  20#include <linux/of_address.h>
  21#include <linux/of_net.h>
  22#include <linux/of_mdio.h>
  23#include <net/dsa.h>
  24#include <linux/ethtool.h>
  25#include <linux/if_bridge.h>
  26#include <linux/brcmphy.h>
  27#include <linux/etherdevice.h>
  28#include <linux/platform_data/b53.h>
  29
  30#include "bcm_sf2.h"
  31#include "bcm_sf2_regs.h"
  32#include "b53/b53_priv.h"
  33#include "b53/b53_regs.h"
  34
  35static u16 bcm_sf2_reg_rgmii_cntrl(struct bcm_sf2_priv *priv, int port)
  36{
  37	switch (priv->type) {
  38	case BCM4908_DEVICE_ID:
  39		switch (port) {
  40		case 7:
  41			return REG_RGMII_11_CNTRL;
  42		default:
  43			break;
  44		}
  45		break;
  46	default:
  47		switch (port) {
  48		case 0:
  49			return REG_RGMII_0_CNTRL;
  50		case 1:
  51			return REG_RGMII_1_CNTRL;
  52		case 2:
  53			return REG_RGMII_2_CNTRL;
  54		default:
  55			break;
  56		}
  57	}
  58
  59	WARN_ONCE(1, "Unsupported port %d\n", port);
  60
  61	/* RO fallback reg */
  62	return REG_SWITCH_STATUS;
  63}
  64
  65static u16 bcm_sf2_reg_led_base(struct bcm_sf2_priv *priv, int port)
  66{
  67	switch (port) {
  68	case 0:
  69		return REG_LED_0_CNTRL;
  70	case 1:
  71		return REG_LED_1_CNTRL;
  72	case 2:
  73		return REG_LED_2_CNTRL;
  74	}
  75
  76	switch (priv->type) {
  77	case BCM4908_DEVICE_ID:
  78		switch (port) {
  79		case 3:
  80			return REG_LED_3_CNTRL;
  81		case 7:
  82			return REG_LED_4_CNTRL;
  83		default:
  84			break;
  85		}
  86		break;
  87	default:
  88		break;
  89	}
  90
  91	WARN_ONCE(1, "Unsupported port %d\n", port);
  92
  93	/* RO fallback reg */
  94	return REG_SWITCH_STATUS;
  95}
  96
  97static u32 bcm_sf2_port_override_offset(struct bcm_sf2_priv *priv, int port)
  98{
  99	switch (priv->type) {
 100	case BCM4908_DEVICE_ID:
 101	case BCM7445_DEVICE_ID:
 102		return port == 8 ? CORE_STS_OVERRIDE_IMP :
 103				   CORE_STS_OVERRIDE_GMIIP_PORT(port);
 104	case BCM7278_DEVICE_ID:
 105		return port == 8 ? CORE_STS_OVERRIDE_IMP2 :
 106				   CORE_STS_OVERRIDE_GMIIP2_PORT(port);
 107	default:
 108		WARN_ONCE(1, "Unsupported device: %d\n", priv->type);
 109	}
 110
 111	/* RO fallback register */
 112	return REG_SWITCH_STATUS;
 113}
 114
 115/* Return the number of active ports, not counting the IMP (CPU) port */
 116static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds)
 117{
 118	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 119	unsigned int port, count = 0;
 120
 121	for (port = 0; port < ds->num_ports; port++) {
 122		if (dsa_is_cpu_port(ds, port))
 123			continue;
 124		if (priv->port_sts[port].enabled)
 125			count++;
 126	}
 127
 128	return count;
 129}
 130
 131static void bcm_sf2_recalc_clock(struct dsa_switch *ds)
 132{
 133	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 134	unsigned long new_rate;
 135	unsigned int ports_active;
 136	/* Frequenty in Mhz */
 137	static const unsigned long rate_table[] = {
 138		59220000,
 139		60820000,
 140		62500000,
 141		62500000,
 142	};
 143
 144	ports_active = bcm_sf2_num_active_ports(ds);
 145	if (ports_active == 0 || !priv->clk_mdiv)
 146		return;
 147
 148	/* If we overflow our table, just use the recommended operational
 149	 * frequency
 150	 */
 151	if (ports_active > ARRAY_SIZE(rate_table))
 152		new_rate = 90000000;
 153	else
 154		new_rate = rate_table[ports_active - 1];
 155	clk_set_rate(priv->clk_mdiv, new_rate);
 156}
 157
 158static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
 159{
 160	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 161	unsigned int i;
 162	u32 reg;
 163
 164	/* Enable the port memories */
 165	reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
 166	reg &= ~P_TXQ_PSM_VDD(port);
 167	core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
 168
 169	/* Enable forwarding */
 170	core_writel(priv, SW_FWDG_EN, CORE_SWMODE);
 171
 172	/* Enable IMP port in dumb mode */
 173	reg = core_readl(priv, CORE_SWITCH_CTRL);
 174	reg |= MII_DUMB_FWDG_EN;
 175	core_writel(priv, reg, CORE_SWITCH_CTRL);
 176
 177	/* Configure Traffic Class to QoS mapping, allow each priority to map
 178	 * to a different queue number
 179	 */
 180	reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
 181	for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
 182		reg |= i << (PRT_TO_QID_SHIFT * i);
 183	core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
 184
 185	b53_brcm_hdr_setup(ds, port);
 186
 187	if (port == 8) {
 188		/* Enable Broadcast, Multicast, Unicast forwarding to IMP port */
 189		reg = core_readl(priv, CORE_IMP_CTL);
 190		reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN);
 191		reg &= ~(RX_DIS | TX_DIS);
 192		core_writel(priv, reg, CORE_IMP_CTL);
 193	} else {
 194		reg = core_readl(priv, CORE_G_PCTL_PORT(port));
 195		reg &= ~(RX_DIS | TX_DIS);
 196		core_writel(priv, reg, CORE_G_PCTL_PORT(port));
 197	}
 198
 199	priv->port_sts[port].enabled = true;
 200}
 201
 202static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable)
 203{
 204	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 205	u32 reg;
 206
 207	reg = reg_readl(priv, REG_SPHY_CNTRL);
 208	if (enable) {
 209		reg |= PHY_RESET;
 210		reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | IDDQ_GLOBAL_PWR | CK25_DIS);
 211		reg_writel(priv, reg, REG_SPHY_CNTRL);
 212		udelay(21);
 213		reg = reg_readl(priv, REG_SPHY_CNTRL);
 214		reg &= ~PHY_RESET;
 215	} else {
 216		reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET;
 217		reg_writel(priv, reg, REG_SPHY_CNTRL);
 218		mdelay(1);
 219		reg |= CK25_DIS;
 220	}
 221	reg_writel(priv, reg, REG_SPHY_CNTRL);
 222
 223	/* Use PHY-driven LED signaling */
 224	if (!enable) {
 225		u16 led_ctrl = bcm_sf2_reg_led_base(priv, 0);
 226
 227		if (priv->type == BCM7278_DEVICE_ID ||
 228		    priv->type == BCM7445_DEVICE_ID) {
 229			reg = reg_led_readl(priv, led_ctrl, 0);
 230			reg |= LED_CNTRL_SPDLNK_SRC_SEL;
 231			reg_led_writel(priv, reg, led_ctrl, 0);
 232		}
 233	}
 234}
 235
 236static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv,
 237					    int port)
 238{
 239	unsigned int off;
 240
 241	switch (port) {
 242	case 7:
 243		off = P7_IRQ_OFF;
 244		break;
 245	case 0:
 246		/* Port 0 interrupts are located on the first bank */
 247		intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF));
 248		return;
 249	default:
 250		off = P_IRQ_OFF(port);
 251		break;
 252	}
 253
 254	intrl2_1_mask_clear(priv, P_IRQ_MASK(off));
 255}
 256
 257static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv,
 258					     int port)
 259{
 260	unsigned int off;
 261
 262	switch (port) {
 263	case 7:
 264		off = P7_IRQ_OFF;
 265		break;
 266	case 0:
 267		/* Port 0 interrupts are located on the first bank */
 268		intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF));
 269		intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR);
 270		return;
 271	default:
 272		off = P_IRQ_OFF(port);
 273		break;
 274	}
 275
 276	intrl2_1_mask_set(priv, P_IRQ_MASK(off));
 277	intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR);
 278}
 279
 280static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 281			      struct phy_device *phy)
 282{
 283	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 284	unsigned int i;
 285	u32 reg;
 286
 287	if (!dsa_is_user_port(ds, port))
 288		return 0;
 289
 290	priv->port_sts[port].enabled = true;
 291
 292	bcm_sf2_recalc_clock(ds);
 293
 294	/* Clear the memory power down */
 295	reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
 296	reg &= ~P_TXQ_PSM_VDD(port);
 297	core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
 298
 299	/* Enable Broadcom tags for that port if requested */
 300	if (priv->brcm_tag_mask & BIT(port))
 301		b53_brcm_hdr_setup(ds, port);
 302
 303	/* Configure Traffic Class to QoS mapping, allow each priority to map
 304	 * to a different queue number
 305	 */
 306	reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
 307	for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
 308		reg |= i << (PRT_TO_QID_SHIFT * i);
 309	core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
 310
 311	/* Re-enable the GPHY and re-apply workarounds */
 312	if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) {
 313		bcm_sf2_gphy_enable_set(ds, true);
 314		if (phy) {
 315			/* if phy_stop() has been called before, phy
 316			 * will be in halted state, and phy_start()
 317			 * will call resume.
 318			 *
 319			 * the resume path does not configure back
 320			 * autoneg settings, and since we hard reset
 321			 * the phy manually here, we need to reset the
 322			 * state machine also.
 323			 */
 324			phy->state = PHY_READY;
 325			phy_init_hw(phy);
 326		}
 327	}
 328
 329	/* Enable MoCA port interrupts to get notified */
 330	if (port == priv->moca_port)
 331		bcm_sf2_port_intr_enable(priv, port);
 332
 333	/* Set per-queue pause threshold to 32 */
 334	core_writel(priv, 32, CORE_TXQ_THD_PAUSE_QN_PORT(port));
 335
 336	/* Set ACB threshold to 24 */
 337	for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) {
 338		reg = acb_readl(priv, ACB_QUEUE_CFG(port *
 339						    SF2_NUM_EGRESS_QUEUES + i));
 340		reg &= ~XOFF_THRESHOLD_MASK;
 341		reg |= 24;
 342		acb_writel(priv, reg, ACB_QUEUE_CFG(port *
 343						    SF2_NUM_EGRESS_QUEUES + i));
 344	}
 345
 346	return b53_enable_port(ds, port, phy);
 347}
 348
 349static void bcm_sf2_port_disable(struct dsa_switch *ds, int port)
 350{
 351	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 352	u32 reg;
 353
 354	/* Disable learning while in WoL mode */
 355	if (priv->wol_ports_mask & (1 << port)) {
 356		reg = core_readl(priv, CORE_DIS_LEARN);
 357		reg |= BIT(port);
 358		core_writel(priv, reg, CORE_DIS_LEARN);
 359		return;
 360	}
 361
 362	if (port == priv->moca_port)
 363		bcm_sf2_port_intr_disable(priv, port);
 364
 365	if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1)
 366		bcm_sf2_gphy_enable_set(ds, false);
 367
 368	b53_disable_port(ds, port);
 369
 370	/* Power down the port memory */
 371	reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
 372	reg |= P_TXQ_PSM_VDD(port);
 373	core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
 374
 375	priv->port_sts[port].enabled = false;
 376
 377	bcm_sf2_recalc_clock(ds);
 378}
 379
 380
 381static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr,
 382			       int regnum, u16 val)
 383{
 384	int ret = 0;
 385	u32 reg;
 386
 387	reg = reg_readl(priv, REG_SWITCH_CNTRL);
 388	reg |= MDIO_MASTER_SEL;
 389	reg_writel(priv, reg, REG_SWITCH_CNTRL);
 390
 391	/* Page << 8 | offset */
 392	reg = 0x70;
 393	reg <<= 2;
 394	core_writel(priv, addr, reg);
 395
 396	/* Page << 8 | offset */
 397	reg = 0x80 << 8 | regnum << 1;
 398	reg <<= 2;
 399
 400	if (op)
 401		ret = core_readl(priv, reg);
 402	else
 403		core_writel(priv, val, reg);
 404
 405	reg = reg_readl(priv, REG_SWITCH_CNTRL);
 406	reg &= ~MDIO_MASTER_SEL;
 407	reg_writel(priv, reg, REG_SWITCH_CNTRL);
 408
 409	return ret & 0xffff;
 410}
 411
 412static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)
 413{
 414	struct bcm_sf2_priv *priv = bus->priv;
 415
 416	/* Intercept reads from Broadcom pseudo-PHY address, else, send
 417	 * them to our master MDIO bus controller
 418	 */
 419	if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
 420		return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0);
 421	else
 422		return mdiobus_read_nested(priv->master_mii_bus, addr, regnum);
 423}
 424
 425static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum,
 426				 u16 val)
 427{
 428	struct bcm_sf2_priv *priv = bus->priv;
 429
 430	/* Intercept writes to the Broadcom pseudo-PHY address, else,
 431	 * send them to our master MDIO bus controller
 432	 */
 433	if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
 434		return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val);
 435	else
 436		return mdiobus_write_nested(priv->master_mii_bus, addr,
 437				regnum, val);
 438}
 439
 440static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
 441{
 442	struct dsa_switch *ds = dev_id;
 443	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 444
 445	priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
 446				~priv->irq0_mask;
 447	intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
 448
 449	return IRQ_HANDLED;
 450}
 451
 452static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id)
 453{
 454	struct dsa_switch *ds = dev_id;
 455	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 456
 457	priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
 458				~priv->irq1_mask;
 459	intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
 460
 461	if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) {
 462		priv->port_sts[7].link = true;
 463		dsa_port_phylink_mac_change(ds, 7, true);
 464	}
 465	if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) {
 466		priv->port_sts[7].link = false;
 467		dsa_port_phylink_mac_change(ds, 7, false);
 468	}
 469
 470	return IRQ_HANDLED;
 471}
 472
 473static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv)
 474{
 475	unsigned int timeout = 1000;
 476	u32 reg;
 477	int ret;
 478
 479	/* The watchdog reset does not work on 7278, we need to hit the
 480	 * "external" reset line through the reset controller.
 481	 */
 482	if (priv->type == BCM7278_DEVICE_ID) {
 483		ret = reset_control_assert(priv->rcdev);
 484		if (ret)
 485			return ret;
 486
 487		return reset_control_deassert(priv->rcdev);
 488	}
 489
 490	reg = core_readl(priv, CORE_WATCHDOG_CTRL);
 491	reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET;
 492	core_writel(priv, reg, CORE_WATCHDOG_CTRL);
 493
 494	do {
 495		reg = core_readl(priv, CORE_WATCHDOG_CTRL);
 496		if (!(reg & SOFTWARE_RESET))
 497			break;
 498
 499		usleep_range(1000, 2000);
 500	} while (timeout-- > 0);
 501
 502	if (timeout == 0)
 503		return -ETIMEDOUT;
 504
 505	return 0;
 506}
 507
 508static void bcm_sf2_crossbar_setup(struct bcm_sf2_priv *priv)
 509{
 510	struct device *dev = priv->dev->ds->dev;
 511	int shift;
 512	u32 mask;
 513	u32 reg;
 514	int i;
 515
 516	mask = BIT(priv->num_crossbar_ext_bits) - 1;
 517
 518	reg = reg_readl(priv, REG_CROSSBAR);
 519	switch (priv->type) {
 520	case BCM4908_DEVICE_ID:
 521		shift = CROSSBAR_BCM4908_INT_P7 * priv->num_crossbar_ext_bits;
 522		reg &= ~(mask << shift);
 523		if (0) /* FIXME */
 524			reg |= CROSSBAR_BCM4908_EXT_SERDES << shift;
 525		else if (priv->int_phy_mask & BIT(7))
 526			reg |= CROSSBAR_BCM4908_EXT_GPHY4 << shift;
 527		else if (phy_interface_mode_is_rgmii(priv->port_sts[7].mode))
 528			reg |= CROSSBAR_BCM4908_EXT_RGMII << shift;
 529		else if (WARN(1, "Invalid port mode\n"))
 530			return;
 531		break;
 532	default:
 533		return;
 534	}
 535	reg_writel(priv, reg, REG_CROSSBAR);
 536
 537	reg = reg_readl(priv, REG_CROSSBAR);
 538	for (i = 0; i < priv->num_crossbar_int_ports; i++) {
 539		shift = i * priv->num_crossbar_ext_bits;
 540
 541		dev_dbg(dev, "crossbar int port #%d - ext port #%d\n", i,
 542			(reg >> shift) & mask);
 543	}
 544}
 545
 546static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv)
 547{
 548	intrl2_0_mask_set(priv, 0xffffffff);
 549	intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
 550	intrl2_1_mask_set(priv, 0xffffffff);
 551	intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
 552}
 553
 554static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv,
 555				   struct device_node *dn)
 556{
 557	struct device *dev = priv->dev->ds->dev;
 558	struct bcm_sf2_port_status *port_st;
 559	struct device_node *port;
 560	unsigned int port_num;
 561	struct property *prop;
 562	int err;
 563
 564	priv->moca_port = -1;
 565
 566	for_each_available_child_of_node(dn, port) {
 567		if (of_property_read_u32(port, "reg", &port_num))
 568			continue;
 569
 570		if (port_num >= DSA_MAX_PORTS) {
 571			dev_err(dev, "Invalid port number %d\n", port_num);
 572			continue;
 573		}
 574
 575		port_st = &priv->port_sts[port_num];
 576
 577		/* Internal PHYs get assigned a specific 'phy-mode' property
 578		 * value: "internal" to help flag them before MDIO probing
 579		 * has completed, since they might be turned off at that
 580		 * time
 581		 */
 582		err = of_get_phy_mode(port, &port_st->mode);
 583		if (err)
 584			continue;
 585
 586		if (port_st->mode == PHY_INTERFACE_MODE_INTERNAL)
 587			priv->int_phy_mask |= 1 << port_num;
 588
 589		if (port_st->mode == PHY_INTERFACE_MODE_MOCA)
 590			priv->moca_port = port_num;
 591
 592		if (of_property_read_bool(port, "brcm,use-bcm-hdr"))
 593			priv->brcm_tag_mask |= 1 << port_num;
 594
 595		/* Ensure that port 5 is not picked up as a DSA CPU port
 596		 * flavour but a regular port instead. We should be using
 597		 * devlink to be able to set the port flavour.
 598		 */
 599		if (port_num == 5 && priv->type == BCM7278_DEVICE_ID) {
 600			prop = of_find_property(port, "ethernet", NULL);
 601			if (prop)
 602				of_remove_property(port, prop);
 603		}
 604	}
 605}
 606
 607static int bcm_sf2_mdio_register(struct dsa_switch *ds)
 608{
 609	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 610	struct device_node *dn, *child;
 611	struct phy_device *phydev;
 612	struct property *prop;
 613	static int index;
 614	int err, reg;
 615
 616	/* Find our integrated MDIO bus node */
 617	dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio");
 618	priv->master_mii_bus = of_mdio_find_bus(dn);
 619	if (!priv->master_mii_bus) {
 620		err = -EPROBE_DEFER;
 621		goto err_of_node_put;
 622	}
 623
 624	priv->user_mii_bus = mdiobus_alloc();
 625	if (!priv->user_mii_bus) {
 626		err = -ENOMEM;
 627		goto err_put_master_mii_bus_dev;
 628	}
 629
 630	priv->user_mii_bus->priv = priv;
 631	priv->user_mii_bus->name = "sf2 user mii";
 632	priv->user_mii_bus->read = bcm_sf2_sw_mdio_read;
 633	priv->user_mii_bus->write = bcm_sf2_sw_mdio_write;
 634	snprintf(priv->user_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d",
 635		 index++);
 636
 637	/* Include the pseudo-PHY address to divert reads towards our
 638	 * workaround. This is only required for 7445D0, since 7445E0
 639	 * disconnects the internal switch pseudo-PHY such that we can use the
 640	 * regular SWITCH_MDIO master controller instead.
 641	 *
 642	 * Here we flag the pseudo PHY as needing special treatment and would
 643	 * otherwise make all other PHY read/writes go to the master MDIO bus
 644	 * controller that comes with this switch backed by the "mdio-unimac"
 645	 * driver.
 646	 */
 647	if (of_machine_is_compatible("brcm,bcm7445d0"))
 648		priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0);
 649	else
 650		priv->indir_phy_mask = 0;
 651
 652	ds->phys_mii_mask = priv->indir_phy_mask;
 653	ds->user_mii_bus = priv->user_mii_bus;
 654	priv->user_mii_bus->parent = ds->dev->parent;
 655	priv->user_mii_bus->phy_mask = ~priv->indir_phy_mask;
 656
 657	/* We need to make sure that of_phy_connect() will not work by
 658	 * removing the 'phandle' and 'linux,phandle' properties and
 659	 * unregister the existing PHY device that was already registered.
 660	 */
 661	for_each_available_child_of_node(dn, child) {
 662		if (of_property_read_u32(child, "reg", &reg) ||
 663		    reg >= PHY_MAX_ADDR)
 664			continue;
 665
 666		if (!(priv->indir_phy_mask & BIT(reg)))
 667			continue;
 668
 669		prop = of_find_property(child, "phandle", NULL);
 670		if (prop)
 671			of_remove_property(child, prop);
 672
 673		prop = of_find_property(child, "linux,phandle", NULL);
 674		if (prop)
 675			of_remove_property(child, prop);
 676
 677		phydev = of_phy_find_device(child);
 678		if (phydev) {
 679			phy_device_remove(phydev);
 680			phy_device_free(phydev);
 681		}
 682	}
 683
 684	err = mdiobus_register(priv->user_mii_bus);
 685	if (err)
 686		goto err_free_user_mii_bus;
 687
 688	of_node_put(dn);
 689
 690	return 0;
 691
 692err_free_user_mii_bus:
 693	mdiobus_free(priv->user_mii_bus);
 694err_put_master_mii_bus_dev:
 695	put_device(&priv->master_mii_bus->dev);
 696err_of_node_put:
 697	of_node_put(dn);
 698	return err;
 699}
 700
 701static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv)
 702{
 703	mdiobus_unregister(priv->user_mii_bus);
 704	mdiobus_free(priv->user_mii_bus);
 705	put_device(&priv->master_mii_bus->dev);
 706}
 707
 708static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port)
 709{
 710	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 711
 712	/* The BCM7xxx PHY driver expects to find the integrated PHY revision
 713	 * in bits 15:8 and the patch level in bits 7:0 which is exactly what
 714	 * the REG_PHY_REVISION register layout is.
 715	 */
 716	if (priv->int_phy_mask & BIT(port))
 717		return priv->hw_params.gphy_rev;
 718	else
 719		return PHY_BRCM_AUTO_PWRDWN_ENABLE |
 720		       PHY_BRCM_DIS_TXCRXC_NOENRGY |
 721		       PHY_BRCM_IDDQ_SUSPEND;
 722}
 723
 724static void bcm_sf2_sw_get_caps(struct dsa_switch *ds, int port,
 725				struct phylink_config *config)
 726{
 727	unsigned long *interfaces = config->supported_interfaces;
 728	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 729
 730	if (priv->int_phy_mask & BIT(port)) {
 731		__set_bit(PHY_INTERFACE_MODE_INTERNAL, interfaces);
 732	} else if (priv->moca_port == port) {
 733		__set_bit(PHY_INTERFACE_MODE_MOCA, interfaces);
 734	} else {
 735		__set_bit(PHY_INTERFACE_MODE_MII, interfaces);
 736		__set_bit(PHY_INTERFACE_MODE_REVMII, interfaces);
 737		__set_bit(PHY_INTERFACE_MODE_GMII, interfaces);
 738		phy_interface_set_rgmii(interfaces);
 739	}
 740
 741	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
 742		MAC_10 | MAC_100 | MAC_1000;
 743}
 744
 745static void bcm_sf2_sw_mac_config(struct phylink_config *config,
 746				  unsigned int mode,
 747				  const struct phylink_link_state *state)
 748{
 749	struct dsa_port *dp = dsa_phylink_to_port(config);
 750	u32 id_mode_dis = 0, port_mode;
 751	struct bcm_sf2_priv *priv;
 752	u32 reg_rgmii_ctrl;
 753	u32 reg;
 754
 755	priv = bcm_sf2_to_priv(dp->ds);
 756
 757	if (dp->index == core_readl(priv, CORE_IMP0_PRT_ID))
 758		return;
 759
 760	switch (state->interface) {
 761	case PHY_INTERFACE_MODE_RGMII:
 762		id_mode_dis = 1;
 763		fallthrough;
 764	case PHY_INTERFACE_MODE_RGMII_TXID:
 765		port_mode = EXT_GPHY;
 766		break;
 767	case PHY_INTERFACE_MODE_MII:
 768		port_mode = EXT_EPHY;
 769		break;
 770	case PHY_INTERFACE_MODE_REVMII:
 771		port_mode = EXT_REVMII;
 772		break;
 773	default:
 774		/* Nothing required for all other PHYs: internal and MoCA */
 775		return;
 776	}
 777
 778	reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, dp->index);
 779
 780	/* Clear id_mode_dis bit, and the existing port mode, let
 781	 * RGMII_MODE_EN bet set by mac_link_{up,down}
 782	 */
 783	reg = reg_readl(priv, reg_rgmii_ctrl);
 784	reg &= ~ID_MODE_DIS;
 785	reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
 786
 787	reg |= port_mode;
 788	if (id_mode_dis)
 789		reg |= ID_MODE_DIS;
 790
 791	reg_writel(priv, reg, reg_rgmii_ctrl);
 792}
 793
 794static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port,
 795				    phy_interface_t interface, bool link)
 796{
 797	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 798	u32 reg_rgmii_ctrl;
 799	u32 reg;
 800
 801	if (!phy_interface_mode_is_rgmii(interface) &&
 802	    interface != PHY_INTERFACE_MODE_MII &&
 803	    interface != PHY_INTERFACE_MODE_REVMII)
 804		return;
 805
 806	reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
 807
 808	/* If the link is down, just disable the interface to conserve power */
 809	reg = reg_readl(priv, reg_rgmii_ctrl);
 810	if (link)
 811		reg |= RGMII_MODE_EN;
 812	else
 813		reg &= ~RGMII_MODE_EN;
 814	reg_writel(priv, reg, reg_rgmii_ctrl);
 815}
 816
 817static void bcm_sf2_sw_mac_link_down(struct phylink_config *config,
 818				     unsigned int mode,
 819				     phy_interface_t interface)
 820{
 821	struct dsa_port *dp = dsa_phylink_to_port(config);
 822	struct bcm_sf2_priv *priv;
 823	int port = dp->index;
 824	u32 reg, offset;
 825
 826	priv = bcm_sf2_to_priv(dp->ds);
 827	if (priv->wol_ports_mask & BIT(port))
 828		return;
 829
 830	offset = bcm_sf2_port_override_offset(priv, port);
 831	reg = core_readl(priv, offset);
 832	reg &= ~LINK_STS;
 833	core_writel(priv, reg, offset);
 834
 835	bcm_sf2_sw_mac_link_set(dp->ds, port, interface, false);
 836}
 837
 838static void bcm_sf2_sw_mac_link_up(struct phylink_config *config,
 839				   struct phy_device *phydev,
 840				   unsigned int mode,
 841				   phy_interface_t interface,
 
 842				   int speed, int duplex,
 843				   bool tx_pause, bool rx_pause)
 844{
 845	struct dsa_port *dp = dsa_phylink_to_port(config);
 846	struct bcm_sf2_priv *priv;
 847	u32 reg_rgmii_ctrl = 0;
 848	struct ethtool_keee *p;
 849	int port = dp->index;
 850	u32 reg, offset;
 851
 852	bcm_sf2_sw_mac_link_set(dp->ds, port, interface, true);
 853
 854	priv = bcm_sf2_to_priv(dp->ds);
 855	offset = bcm_sf2_port_override_offset(priv, port);
 856
 857	if (phy_interface_mode_is_rgmii(interface) ||
 858	    interface == PHY_INTERFACE_MODE_MII ||
 859	    interface == PHY_INTERFACE_MODE_REVMII) {
 860		reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
 861		reg = reg_readl(priv, reg_rgmii_ctrl);
 862		reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
 863
 864		if (tx_pause)
 865			reg |= TX_PAUSE_EN;
 866		if (rx_pause)
 867			reg |= RX_PAUSE_EN;
 868
 869		reg_writel(priv, reg, reg_rgmii_ctrl);
 870	}
 871
 872	reg = LINK_STS;
 873	if (port == 8) {
 874		if (priv->type == BCM4908_DEVICE_ID)
 875			reg |= GMII_SPEED_UP_2G;
 876		reg |= MII_SW_OR;
 877	} else {
 878		reg |= SW_OVERRIDE;
 879	}
 880
 881	switch (speed) {
 882	case SPEED_1000:
 883		reg |= SPDSTS_1000 << SPEED_SHIFT;
 884		break;
 885	case SPEED_100:
 886		reg |= SPDSTS_100 << SPEED_SHIFT;
 887		break;
 888	}
 889
 890	if (duplex == DUPLEX_FULL)
 891		reg |= DUPLX_MODE;
 892
 893	if (tx_pause)
 894		reg |= TXFLOW_CNTL;
 895	if (rx_pause)
 896		reg |= RXFLOW_CNTL;
 897
 898	core_writel(priv, reg, offset);
 899
 900	if (mode == MLO_AN_PHY && phydev) {
 901		p = &priv->dev->ports[port].eee;
 902		p->eee_enabled = b53_eee_init(dp->ds, port, phydev);
 903	}
 904}
 905
 906static void bcm_sf2_sw_fixed_state(struct dsa_switch *ds, int port,
 907				   struct phylink_link_state *status)
 908{
 909	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 910
 911	status->link = false;
 912
 913	/* MoCA port is special as we do not get link status from CORE_LNKSTS,
 914	 * which means that we need to force the link at the port override
 915	 * level to get the data to flow. We do use what the interrupt handler
 916	 * did determine before.
 917	 *
 918	 * For the other ports, we just force the link status, since this is
 919	 * a fixed PHY device.
 920	 */
 921	if (port == priv->moca_port) {
 922		status->link = priv->port_sts[port].link;
 923		/* For MoCA interfaces, also force a link down notification
 924		 * since some version of the user-space daemon (mocad) use
 925		 * cmd->autoneg to force the link, which messes up the PHY
 926		 * state machine and make it go in PHY_FORCING state instead.
 927		 */
 928		if (!status->link)
 929			netif_carrier_off(dsa_to_port(ds, port)->user);
 930		status->duplex = DUPLEX_FULL;
 931	} else {
 932		status->link = true;
 933	}
 934}
 935
 936static void bcm_sf2_enable_acb(struct dsa_switch *ds)
 937{
 938	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 939	u32 reg;
 940
 941	/* Enable ACB globally */
 942	reg = acb_readl(priv, ACB_CONTROL);
 943	reg |= (ACB_FLUSH_MASK << ACB_FLUSH_SHIFT);
 944	acb_writel(priv, reg, ACB_CONTROL);
 945	reg &= ~(ACB_FLUSH_MASK << ACB_FLUSH_SHIFT);
 946	reg |= ACB_EN | ACB_ALGORITHM;
 947	acb_writel(priv, reg, ACB_CONTROL);
 948}
 949
 950static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
 951{
 952	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 953	unsigned int port;
 954
 955	bcm_sf2_intr_disable(priv);
 956
 957	/* Disable all ports physically present including the IMP
 958	 * port, the other ones have already been disabled during
 959	 * bcm_sf2_sw_setup
 960	 */
 961	for (port = 0; port < ds->num_ports; port++) {
 962		if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port))
 963			bcm_sf2_port_disable(ds, port);
 964	}
 965
 966	if (!priv->wol_ports_mask)
 967		clk_disable_unprepare(priv->clk);
 968
 969	return 0;
 970}
 971
 972static int bcm_sf2_sw_resume(struct dsa_switch *ds)
 973{
 974	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 975	int ret;
 976
 977	if (!priv->wol_ports_mask)
 978		clk_prepare_enable(priv->clk);
 979
 980	ret = bcm_sf2_sw_rst(priv);
 981	if (ret) {
 982		pr_err("%s: failed to software reset switch\n", __func__);
 983		return ret;
 984	}
 985
 986	bcm_sf2_crossbar_setup(priv);
 987
 988	ret = bcm_sf2_cfp_resume(ds);
 989	if (ret)
 990		return ret;
 991
 992	if (priv->hw_params.num_gphy == 1)
 993		bcm_sf2_gphy_enable_set(ds, true);
 994
 995	ds->ops->setup(ds);
 996
 997	return 0;
 998}
 999
1000static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
1001			       struct ethtool_wolinfo *wol)
1002{
1003	struct net_device *p = dsa_port_to_conduit(dsa_to_port(ds, port));
1004	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1005	struct ethtool_wolinfo pwol = { };
1006
1007	/* Get the parent device WoL settings */
1008	if (p->ethtool_ops->get_wol)
1009		p->ethtool_ops->get_wol(p, &pwol);
1010
1011	/* Advertise the parent device supported settings */
1012	wol->supported = pwol.supported;
1013	memset(&wol->sopass, 0, sizeof(wol->sopass));
1014
1015	if (pwol.wolopts & WAKE_MAGICSECURE)
1016		memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass));
1017
1018	if (priv->wol_ports_mask & (1 << port))
1019		wol->wolopts = pwol.wolopts;
1020	else
1021		wol->wolopts = 0;
1022}
1023
1024static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
1025			      struct ethtool_wolinfo *wol)
1026{
1027	struct net_device *p = dsa_port_to_conduit(dsa_to_port(ds, port));
1028	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1029	s8 cpu_port = dsa_to_port(ds, port)->cpu_dp->index;
1030	struct ethtool_wolinfo pwol =  { };
1031
1032	if (p->ethtool_ops->get_wol)
1033		p->ethtool_ops->get_wol(p, &pwol);
1034	if (wol->wolopts & ~pwol.supported)
1035		return -EINVAL;
1036
1037	if (wol->wolopts)
1038		priv->wol_ports_mask |= (1 << port);
1039	else
1040		priv->wol_ports_mask &= ~(1 << port);
1041
1042	/* If we have at least one port enabled, make sure the CPU port
1043	 * is also enabled. If the CPU port is the last one enabled, we disable
1044	 * it since this configuration does not make sense.
1045	 */
1046	if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port))
1047		priv->wol_ports_mask |= (1 << cpu_port);
1048	else
1049		priv->wol_ports_mask &= ~(1 << cpu_port);
1050
1051	return p->ethtool_ops->set_wol(p, wol);
1052}
1053
1054static int bcm_sf2_sw_setup(struct dsa_switch *ds)
1055{
1056	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1057	unsigned int port;
1058
1059	/* Enable all valid ports and disable those unused */
1060	for (port = 0; port < priv->hw_params.num_ports; port++) {
1061		/* IMP port receives special treatment */
1062		if (dsa_is_user_port(ds, port))
1063			bcm_sf2_port_setup(ds, port, NULL);
1064		else if (dsa_is_cpu_port(ds, port))
1065			bcm_sf2_imp_setup(ds, port);
1066		else
1067			bcm_sf2_port_disable(ds, port);
1068	}
1069
1070	b53_configure_vlan(ds);
1071	bcm_sf2_enable_acb(ds);
1072
1073	return b53_setup_devlink_resources(ds);
1074}
1075
1076static void bcm_sf2_sw_teardown(struct dsa_switch *ds)
1077{
1078	dsa_devlink_resources_unregister(ds);
1079}
1080
1081/* The SWITCH_CORE register space is managed by b53 but operates on a page +
1082 * register basis so we need to translate that into an address that the
1083 * bus-glue understands.
1084 */
1085#define SF2_PAGE_REG_MKADDR(page, reg)	((page) << 10 | (reg) << 2)
1086
1087static int bcm_sf2_core_read8(struct b53_device *dev, u8 page, u8 reg,
1088			      u8 *val)
1089{
1090	struct bcm_sf2_priv *priv = dev->priv;
1091
1092	*val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
1093
1094	return 0;
1095}
1096
1097static int bcm_sf2_core_read16(struct b53_device *dev, u8 page, u8 reg,
1098			       u16 *val)
1099{
1100	struct bcm_sf2_priv *priv = dev->priv;
1101
1102	*val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
1103
1104	return 0;
1105}
1106
1107static int bcm_sf2_core_read32(struct b53_device *dev, u8 page, u8 reg,
1108			       u32 *val)
1109{
1110	struct bcm_sf2_priv *priv = dev->priv;
1111
1112	*val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
1113
1114	return 0;
1115}
1116
1117static int bcm_sf2_core_read64(struct b53_device *dev, u8 page, u8 reg,
1118			       u64 *val)
1119{
1120	struct bcm_sf2_priv *priv = dev->priv;
1121
1122	*val = core_readq(priv, SF2_PAGE_REG_MKADDR(page, reg));
1123
1124	return 0;
1125}
1126
1127static int bcm_sf2_core_write8(struct b53_device *dev, u8 page, u8 reg,
1128			       u8 value)
1129{
1130	struct bcm_sf2_priv *priv = dev->priv;
1131
1132	core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1133
1134	return 0;
1135}
1136
1137static int bcm_sf2_core_write16(struct b53_device *dev, u8 page, u8 reg,
1138				u16 value)
1139{
1140	struct bcm_sf2_priv *priv = dev->priv;
1141
1142	core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1143
1144	return 0;
1145}
1146
1147static int bcm_sf2_core_write32(struct b53_device *dev, u8 page, u8 reg,
1148				u32 value)
1149{
1150	struct bcm_sf2_priv *priv = dev->priv;
1151
1152	core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1153
1154	return 0;
1155}
1156
1157static int bcm_sf2_core_write64(struct b53_device *dev, u8 page, u8 reg,
1158				u64 value)
1159{
1160	struct bcm_sf2_priv *priv = dev->priv;
1161
1162	core_writeq(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1163
1164	return 0;
1165}
1166
1167static const struct b53_io_ops bcm_sf2_io_ops = {
1168	.read8	= bcm_sf2_core_read8,
1169	.read16	= bcm_sf2_core_read16,
1170	.read32	= bcm_sf2_core_read32,
1171	.read48	= bcm_sf2_core_read64,
1172	.read64	= bcm_sf2_core_read64,
1173	.write8	= bcm_sf2_core_write8,
1174	.write16 = bcm_sf2_core_write16,
1175	.write32 = bcm_sf2_core_write32,
1176	.write48 = bcm_sf2_core_write64,
1177	.write64 = bcm_sf2_core_write64,
1178};
1179
1180static void bcm_sf2_sw_get_strings(struct dsa_switch *ds, int port,
1181				   u32 stringset, uint8_t *data)
1182{
1183	int cnt = b53_get_sset_count(ds, port, stringset);
1184
1185	b53_get_strings(ds, port, stringset, data);
1186	data += cnt * ETH_GSTRING_LEN;
1187	bcm_sf2_cfp_get_strings(ds, port, stringset, &data);
1188}
1189
1190static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds, int port,
1191					 uint64_t *data)
1192{
1193	int cnt = b53_get_sset_count(ds, port, ETH_SS_STATS);
1194
1195	b53_get_ethtool_stats(ds, port, data);
1196	bcm_sf2_cfp_get_ethtool_stats(ds, port, data + cnt);
1197}
1198
1199static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds, int port,
1200				     int sset)
1201{
1202	int cnt = b53_get_sset_count(ds, port, sset);
1203
1204	if (cnt < 0)
1205		return cnt;
1206
1207	cnt += bcm_sf2_cfp_get_sset_count(ds, port, sset);
1208
1209	return cnt;
1210}
1211
1212static const struct phylink_mac_ops bcm_sf2_phylink_mac_ops = {
1213	.mac_config	= bcm_sf2_sw_mac_config,
1214	.mac_link_down	= bcm_sf2_sw_mac_link_down,
1215	.mac_link_up	= bcm_sf2_sw_mac_link_up,
1216};
1217
1218static const struct dsa_switch_ops bcm_sf2_ops = {
1219	.get_tag_protocol	= b53_get_tag_protocol,
1220	.setup			= bcm_sf2_sw_setup,
1221	.teardown		= bcm_sf2_sw_teardown,
1222	.get_strings		= bcm_sf2_sw_get_strings,
1223	.get_ethtool_stats	= bcm_sf2_sw_get_ethtool_stats,
1224	.get_sset_count		= bcm_sf2_sw_get_sset_count,
1225	.get_ethtool_phy_stats	= b53_get_ethtool_phy_stats,
1226	.get_phy_flags		= bcm_sf2_sw_get_phy_flags,
1227	.phylink_get_caps	= bcm_sf2_sw_get_caps,
 
 
 
1228	.phylink_fixed_state	= bcm_sf2_sw_fixed_state,
1229	.suspend		= bcm_sf2_sw_suspend,
1230	.resume			= bcm_sf2_sw_resume,
1231	.get_wol		= bcm_sf2_sw_get_wol,
1232	.set_wol		= bcm_sf2_sw_set_wol,
1233	.port_enable		= bcm_sf2_port_setup,
1234	.port_disable		= bcm_sf2_port_disable,
1235	.get_mac_eee		= b53_get_mac_eee,
1236	.set_mac_eee		= b53_set_mac_eee,
1237	.port_bridge_join	= b53_br_join,
1238	.port_bridge_leave	= b53_br_leave,
1239	.port_pre_bridge_flags	= b53_br_flags_pre,
1240	.port_bridge_flags	= b53_br_flags,
1241	.port_stp_state_set	= b53_br_set_stp_state,
1242	.port_fast_age		= b53_br_fast_age,
1243	.port_vlan_filtering	= b53_vlan_filtering,
1244	.port_vlan_add		= b53_vlan_add,
1245	.port_vlan_del		= b53_vlan_del,
1246	.port_fdb_dump		= b53_fdb_dump,
1247	.port_fdb_add		= b53_fdb_add,
1248	.port_fdb_del		= b53_fdb_del,
1249	.get_rxnfc		= bcm_sf2_get_rxnfc,
1250	.set_rxnfc		= bcm_sf2_set_rxnfc,
1251	.port_mirror_add	= b53_mirror_add,
1252	.port_mirror_del	= b53_mirror_del,
1253	.port_mdb_add		= b53_mdb_add,
1254	.port_mdb_del		= b53_mdb_del,
1255};
1256
1257struct bcm_sf2_of_data {
1258	u32 type;
1259	const u16 *reg_offsets;
1260	unsigned int core_reg_align;
1261	unsigned int num_cfp_rules;
1262	unsigned int num_crossbar_int_ports;
1263	unsigned int num_crossbar_ext_bits;
1264};
1265
1266static const u16 bcm_sf2_4908_reg_offsets[] = {
1267	[REG_SWITCH_CNTRL]	= 0x00,
1268	[REG_SWITCH_STATUS]	= 0x04,
1269	[REG_DIR_DATA_WRITE]	= 0x08,
1270	[REG_DIR_DATA_READ]	= 0x0c,
1271	[REG_SWITCH_REVISION]	= 0x10,
1272	[REG_PHY_REVISION]	= 0x14,
1273	[REG_SPHY_CNTRL]	= 0x24,
1274	[REG_CROSSBAR]		= 0xc8,
1275	[REG_RGMII_11_CNTRL]	= 0x014c,
1276	[REG_LED_0_CNTRL]		= 0x40,
1277	[REG_LED_1_CNTRL]		= 0x4c,
1278	[REG_LED_2_CNTRL]		= 0x58,
1279	[REG_LED_3_CNTRL]		= 0x64,
1280	[REG_LED_4_CNTRL]		= 0x88,
1281	[REG_LED_5_CNTRL]		= 0xa0,
1282	[REG_LED_AGGREGATE_CTRL]	= 0xb8,
1283
1284};
1285
1286static const struct bcm_sf2_of_data bcm_sf2_4908_data = {
1287	.type		= BCM4908_DEVICE_ID,
1288	.core_reg_align	= 0,
1289	.reg_offsets	= bcm_sf2_4908_reg_offsets,
1290	.num_cfp_rules	= 256,
1291	.num_crossbar_int_ports = 2,
1292	.num_crossbar_ext_bits = 2,
1293};
1294
1295/* Register offsets for the SWITCH_REG_* block */
1296static const u16 bcm_sf2_7445_reg_offsets[] = {
1297	[REG_SWITCH_CNTRL]	= 0x00,
1298	[REG_SWITCH_STATUS]	= 0x04,
1299	[REG_DIR_DATA_WRITE]	= 0x08,
1300	[REG_DIR_DATA_READ]	= 0x0C,
1301	[REG_SWITCH_REVISION]	= 0x18,
1302	[REG_PHY_REVISION]	= 0x1C,
1303	[REG_SPHY_CNTRL]	= 0x2C,
1304	[REG_RGMII_0_CNTRL]	= 0x34,
1305	[REG_RGMII_1_CNTRL]	= 0x40,
1306	[REG_RGMII_2_CNTRL]	= 0x4c,
1307	[REG_LED_0_CNTRL]	= 0x90,
1308	[REG_LED_1_CNTRL]	= 0x94,
1309	[REG_LED_2_CNTRL]	= 0x98,
1310};
1311
1312static const struct bcm_sf2_of_data bcm_sf2_7445_data = {
1313	.type		= BCM7445_DEVICE_ID,
1314	.core_reg_align	= 0,
1315	.reg_offsets	= bcm_sf2_7445_reg_offsets,
1316	.num_cfp_rules	= 256,
1317};
1318
1319static const u16 bcm_sf2_7278_reg_offsets[] = {
1320	[REG_SWITCH_CNTRL]	= 0x00,
1321	[REG_SWITCH_STATUS]	= 0x04,
1322	[REG_DIR_DATA_WRITE]	= 0x08,
1323	[REG_DIR_DATA_READ]	= 0x0c,
1324	[REG_SWITCH_REVISION]	= 0x10,
1325	[REG_PHY_REVISION]	= 0x14,
1326	[REG_SPHY_CNTRL]	= 0x24,
1327	[REG_RGMII_0_CNTRL]	= 0xe0,
1328	[REG_RGMII_1_CNTRL]	= 0xec,
1329	[REG_RGMII_2_CNTRL]	= 0xf8,
1330	[REG_LED_0_CNTRL]	= 0x40,
1331	[REG_LED_1_CNTRL]	= 0x4c,
1332	[REG_LED_2_CNTRL]	= 0x58,
1333};
1334
1335static const struct bcm_sf2_of_data bcm_sf2_7278_data = {
1336	.type		= BCM7278_DEVICE_ID,
1337	.core_reg_align	= 1,
1338	.reg_offsets	= bcm_sf2_7278_reg_offsets,
1339	.num_cfp_rules	= 128,
1340};
1341
1342static const struct of_device_id bcm_sf2_of_match[] = {
1343	{ .compatible = "brcm,bcm4908-switch",
1344	  .data = &bcm_sf2_4908_data
1345	},
1346	{ .compatible = "brcm,bcm7445-switch-v4.0",
1347	  .data = &bcm_sf2_7445_data
1348	},
1349	{ .compatible = "brcm,bcm7278-switch-v4.0",
1350	  .data = &bcm_sf2_7278_data
1351	},
1352	{ .compatible = "brcm,bcm7278-switch-v4.8",
1353	  .data = &bcm_sf2_7278_data
1354	},
1355	{ /* sentinel */ },
1356};
1357MODULE_DEVICE_TABLE(of, bcm_sf2_of_match);
1358
1359static int bcm_sf2_sw_probe(struct platform_device *pdev)
1360{
1361	const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME;
1362	struct device_node *dn = pdev->dev.of_node;
1363	const struct of_device_id *of_id = NULL;
1364	const struct bcm_sf2_of_data *data;
1365	struct b53_platform_data *pdata;
1366	struct dsa_switch_ops *ops;
1367	struct device_node *ports;
1368	struct bcm_sf2_priv *priv;
1369	struct b53_device *dev;
1370	struct dsa_switch *ds;
1371	void __iomem **base;
1372	unsigned int i;
1373	u32 reg, rev;
1374	int ret;
1375
1376	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1377	if (!priv)
1378		return -ENOMEM;
1379
1380	ops = devm_kzalloc(&pdev->dev, sizeof(*ops), GFP_KERNEL);
1381	if (!ops)
1382		return -ENOMEM;
1383
1384	dev = b53_switch_alloc(&pdev->dev, &bcm_sf2_io_ops, priv);
1385	if (!dev)
1386		return -ENOMEM;
1387
1388	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
1389	if (!pdata)
1390		return -ENOMEM;
1391
1392	of_id = of_match_node(bcm_sf2_of_match, dn);
1393	if (!of_id || !of_id->data)
1394		return -EINVAL;
1395
1396	data = of_id->data;
1397
1398	/* Set SWITCH_REG register offsets and SWITCH_CORE align factor */
1399	priv->type = data->type;
1400	priv->reg_offsets = data->reg_offsets;
1401	priv->core_reg_align = data->core_reg_align;
1402	priv->num_cfp_rules = data->num_cfp_rules;
1403	priv->num_crossbar_int_ports = data->num_crossbar_int_ports;
1404	priv->num_crossbar_ext_bits = data->num_crossbar_ext_bits;
1405
1406	priv->rcdev = devm_reset_control_get_optional_exclusive(&pdev->dev,
1407								"switch");
1408	if (IS_ERR(priv->rcdev))
1409		return PTR_ERR(priv->rcdev);
1410
1411	/* Auto-detection using standard registers will not work, so
1412	 * provide an indication of what kind of device we are for
1413	 * b53_common to work with
1414	 */
1415	pdata->chip_id = priv->type;
1416	dev->pdata = pdata;
1417
1418	priv->dev = dev;
1419	ds = dev->ds;
1420	ds->ops = &bcm_sf2_ops;
1421	ds->phylink_mac_ops = &bcm_sf2_phylink_mac_ops;
1422
1423	/* Advertise the 8 egress queues */
1424	ds->num_tx_queues = SF2_NUM_EGRESS_QUEUES;
1425
1426	dev_set_drvdata(&pdev->dev, priv);
1427
1428	spin_lock_init(&priv->indir_lock);
1429	mutex_init(&priv->cfp.lock);
1430	INIT_LIST_HEAD(&priv->cfp.rules_list);
1431
1432	/* CFP rule #0 cannot be used for specific classifications, flag it as
1433	 * permanently used
1434	 */
1435	set_bit(0, priv->cfp.used);
1436	set_bit(0, priv->cfp.unique);
1437
1438	/* Balance of_node_put() done by of_find_node_by_name() */
1439	of_node_get(dn);
1440	ports = of_find_node_by_name(dn, "ports");
1441	if (ports) {
1442		bcm_sf2_identify_ports(priv, ports);
1443		of_node_put(ports);
1444	}
1445
1446	priv->irq0 = irq_of_parse_and_map(dn, 0);
1447	priv->irq1 = irq_of_parse_and_map(dn, 1);
1448
1449	base = &priv->core;
1450	for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
1451		*base = devm_platform_ioremap_resource(pdev, i);
1452		if (IS_ERR(*base)) {
1453			pr_err("unable to find register: %s\n", reg_names[i]);
1454			return PTR_ERR(*base);
1455		}
1456		base++;
1457	}
1458
1459	priv->clk = devm_clk_get_optional(&pdev->dev, "sw_switch");
1460	if (IS_ERR(priv->clk))
1461		return PTR_ERR(priv->clk);
1462
1463	ret = clk_prepare_enable(priv->clk);
1464	if (ret)
1465		return ret;
1466
1467	priv->clk_mdiv = devm_clk_get_optional(&pdev->dev, "sw_switch_mdiv");
1468	if (IS_ERR(priv->clk_mdiv)) {
1469		ret = PTR_ERR(priv->clk_mdiv);
1470		goto out_clk;
1471	}
1472
1473	ret = clk_prepare_enable(priv->clk_mdiv);
1474	if (ret)
1475		goto out_clk;
1476
1477	ret = bcm_sf2_sw_rst(priv);
1478	if (ret) {
1479		pr_err("unable to software reset switch: %d\n", ret);
1480		goto out_clk_mdiv;
1481	}
1482
1483	bcm_sf2_crossbar_setup(priv);
1484
1485	bcm_sf2_gphy_enable_set(priv->dev->ds, true);
1486
1487	ret = bcm_sf2_mdio_register(ds);
1488	if (ret) {
1489		pr_err("failed to register MDIO bus\n");
1490		goto out_clk_mdiv;
1491	}
1492
1493	bcm_sf2_gphy_enable_set(priv->dev->ds, false);
1494
1495	ret = bcm_sf2_cfp_rst(priv);
1496	if (ret) {
1497		pr_err("failed to reset CFP\n");
1498		goto out_mdio;
1499	}
1500
1501	/* Disable all interrupts and request them */
1502	bcm_sf2_intr_disable(priv);
1503
1504	ret = devm_request_irq(&pdev->dev, priv->irq0, bcm_sf2_switch_0_isr, 0,
1505			       "switch_0", ds);
1506	if (ret < 0) {
1507		pr_err("failed to request switch_0 IRQ\n");
1508		goto out_mdio;
1509	}
1510
1511	ret = devm_request_irq(&pdev->dev, priv->irq1, bcm_sf2_switch_1_isr, 0,
1512			       "switch_1", ds);
1513	if (ret < 0) {
1514		pr_err("failed to request switch_1 IRQ\n");
1515		goto out_mdio;
1516	}
1517
1518	/* Reset the MIB counters */
1519	reg = core_readl(priv, CORE_GMNCFGCFG);
1520	reg |= RST_MIB_CNT;
1521	core_writel(priv, reg, CORE_GMNCFGCFG);
1522	reg &= ~RST_MIB_CNT;
1523	core_writel(priv, reg, CORE_GMNCFGCFG);
1524
1525	/* Get the maximum number of ports for this switch */
1526	priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1;
1527	if (priv->hw_params.num_ports > DSA_MAX_PORTS)
1528		priv->hw_params.num_ports = DSA_MAX_PORTS;
1529
1530	/* Assume a single GPHY setup if we can't read that property */
1531	if (of_property_read_u32(dn, "brcm,num-gphy",
1532				 &priv->hw_params.num_gphy))
1533		priv->hw_params.num_gphy = 1;
1534
1535	rev = reg_readl(priv, REG_SWITCH_REVISION);
1536	priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) &
1537					SWITCH_TOP_REV_MASK;
1538	priv->hw_params.core_rev = (rev & SF2_REV_MASK);
1539
1540	rev = reg_readl(priv, REG_PHY_REVISION);
1541	priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK;
1542
1543	ret = b53_switch_register(dev);
1544	if (ret)
1545		goto out_mdio;
1546
1547	dev_info(&pdev->dev,
1548		 "Starfighter 2 top: %x.%02x, core: %x.%02x, IRQs: %d, %d\n",
1549		 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff,
1550		 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff,
1551		 priv->irq0, priv->irq1);
1552
1553	return 0;
1554
1555out_mdio:
1556	bcm_sf2_mdio_unregister(priv);
1557out_clk_mdiv:
1558	clk_disable_unprepare(priv->clk_mdiv);
1559out_clk:
1560	clk_disable_unprepare(priv->clk);
1561	return ret;
1562}
1563
1564static void bcm_sf2_sw_remove(struct platform_device *pdev)
1565{
1566	struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1567
1568	if (!priv)
1569		return;
1570
1571	priv->wol_ports_mask = 0;
1572	/* Disable interrupts */
1573	bcm_sf2_intr_disable(priv);
1574	dsa_unregister_switch(priv->dev->ds);
1575	bcm_sf2_cfp_exit(priv->dev->ds);
1576	bcm_sf2_mdio_unregister(priv);
1577	clk_disable_unprepare(priv->clk_mdiv);
1578	clk_disable_unprepare(priv->clk);
1579	if (priv->type == BCM7278_DEVICE_ID)
1580		reset_control_assert(priv->rcdev);
1581}
1582
1583static void bcm_sf2_sw_shutdown(struct platform_device *pdev)
1584{
1585	struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1586
1587	if (!priv)
1588		return;
1589
1590	/* For a kernel about to be kexec'd we want to keep the GPHY on for a
1591	 * successful MDIO bus scan to occur. If we did turn off the GPHY
1592	 * before (e.g: port_disable), this will also power it back on.
1593	 *
1594	 * Do not rely on kexec_in_progress, just power the PHY on.
1595	 */
1596	if (priv->hw_params.num_gphy == 1)
1597		bcm_sf2_gphy_enable_set(priv->dev->ds, true);
1598
1599	dsa_switch_shutdown(priv->dev->ds);
1600
1601	platform_set_drvdata(pdev, NULL);
1602}
1603
1604#ifdef CONFIG_PM_SLEEP
1605static int bcm_sf2_suspend(struct device *dev)
1606{
1607	struct bcm_sf2_priv *priv = dev_get_drvdata(dev);
1608
1609	return dsa_switch_suspend(priv->dev->ds);
1610}
1611
1612static int bcm_sf2_resume(struct device *dev)
1613{
1614	struct bcm_sf2_priv *priv = dev_get_drvdata(dev);
1615
1616	return dsa_switch_resume(priv->dev->ds);
1617}
1618#endif /* CONFIG_PM_SLEEP */
1619
1620static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops,
1621			 bcm_sf2_suspend, bcm_sf2_resume);
1622
1623
1624static struct platform_driver bcm_sf2_driver = {
1625	.probe	= bcm_sf2_sw_probe,
1626	.remove = bcm_sf2_sw_remove,
1627	.shutdown = bcm_sf2_sw_shutdown,
1628	.driver = {
1629		.name = "brcm-sf2",
1630		.of_match_table = bcm_sf2_of_match,
1631		.pm = &bcm_sf2_pm_ops,
1632	},
1633};
1634module_platform_driver(bcm_sf2_driver);
1635
1636MODULE_AUTHOR("Broadcom Corporation");
1637MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip");
1638MODULE_LICENSE("GPL");
1639MODULE_ALIAS("platform:brcm-sf2");