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 35 static 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 65 static 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 97 /* Return the number of active ports, not counting the IMP (CPU) port */ 98 static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds) 99 { 100 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 101 unsigned int port, count = 0; 102 103 for (port = 0; port < ds->num_ports; port++) { 104 if (dsa_is_cpu_port(ds, port)) 105 continue; 106 if (priv->port_sts[port].enabled) 107 count++; 108 } 109 110 return count; 111 } 112 113 static void bcm_sf2_recalc_clock(struct dsa_switch *ds) 114 { 115 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 116 unsigned long new_rate; 117 unsigned int ports_active; 118 /* Frequenty in Mhz */ 119 static const unsigned long rate_table[] = { 120 59220000, 121 60820000, 122 62500000, 123 62500000, 124 }; 125 126 ports_active = bcm_sf2_num_active_ports(ds); 127 if (ports_active == 0 || !priv->clk_mdiv) 128 return; 129 130 /* If we overflow our table, just use the recommended operational 131 * frequency 132 */ 133 if (ports_active > ARRAY_SIZE(rate_table)) 134 new_rate = 90000000; 135 else 136 new_rate = rate_table[ports_active - 1]; 137 clk_set_rate(priv->clk_mdiv, new_rate); 138 } 139 140 static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port) 141 { 142 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 143 unsigned int i; 144 u32 reg, offset; 145 146 /* Enable the port memories */ 147 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); 148 reg &= ~P_TXQ_PSM_VDD(port); 149 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); 150 151 /* Enable forwarding */ 152 core_writel(priv, SW_FWDG_EN, CORE_SWMODE); 153 154 /* Enable IMP port in dumb mode */ 155 reg = core_readl(priv, CORE_SWITCH_CTRL); 156 reg |= MII_DUMB_FWDG_EN; 157 core_writel(priv, reg, CORE_SWITCH_CTRL); 158 159 /* Configure Traffic Class to QoS mapping, allow each priority to map 160 * to a different queue number 161 */ 162 reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port)); 163 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) 164 reg |= i << (PRT_TO_QID_SHIFT * i); 165 core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port)); 166 167 b53_brcm_hdr_setup(ds, port); 168 169 if (port == 8) { 170 if (priv->type == BCM4908_DEVICE_ID || 171 priv->type == BCM7445_DEVICE_ID) 172 offset = CORE_STS_OVERRIDE_IMP; 173 else 174 offset = CORE_STS_OVERRIDE_IMP2; 175 176 /* Force link status for IMP port */ 177 reg = core_readl(priv, offset); 178 reg |= (MII_SW_OR | LINK_STS); 179 if (priv->type == BCM4908_DEVICE_ID) 180 reg |= GMII_SPEED_UP_2G; 181 else 182 reg &= ~GMII_SPEED_UP_2G; 183 core_writel(priv, reg, offset); 184 185 /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */ 186 reg = core_readl(priv, CORE_IMP_CTL); 187 reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN); 188 reg &= ~(RX_DIS | TX_DIS); 189 core_writel(priv, reg, CORE_IMP_CTL); 190 } else { 191 reg = core_readl(priv, CORE_G_PCTL_PORT(port)); 192 reg &= ~(RX_DIS | TX_DIS); 193 core_writel(priv, reg, CORE_G_PCTL_PORT(port)); 194 } 195 196 priv->port_sts[port].enabled = true; 197 } 198 199 static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable) 200 { 201 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 202 u32 reg; 203 204 reg = reg_readl(priv, REG_SPHY_CNTRL); 205 if (enable) { 206 reg |= PHY_RESET; 207 reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | IDDQ_GLOBAL_PWR | CK25_DIS); 208 reg_writel(priv, reg, REG_SPHY_CNTRL); 209 udelay(21); 210 reg = reg_readl(priv, REG_SPHY_CNTRL); 211 reg &= ~PHY_RESET; 212 } else { 213 reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET; 214 reg_writel(priv, reg, REG_SPHY_CNTRL); 215 mdelay(1); 216 reg |= CK25_DIS; 217 } 218 reg_writel(priv, reg, REG_SPHY_CNTRL); 219 220 /* Use PHY-driven LED signaling */ 221 if (!enable) { 222 u16 led_ctrl = bcm_sf2_reg_led_base(priv, 0); 223 224 if (priv->type == BCM7278_DEVICE_ID || 225 priv->type == BCM7445_DEVICE_ID) { 226 reg = reg_led_readl(priv, led_ctrl, 0); 227 reg |= LED_CNTRL_SPDLNK_SRC_SEL; 228 reg_led_writel(priv, reg, led_ctrl, 0); 229 } 230 } 231 } 232 233 static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv, 234 int port) 235 { 236 unsigned int off; 237 238 switch (port) { 239 case 7: 240 off = P7_IRQ_OFF; 241 break; 242 case 0: 243 /* Port 0 interrupts are located on the first bank */ 244 intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF)); 245 return; 246 default: 247 off = P_IRQ_OFF(port); 248 break; 249 } 250 251 intrl2_1_mask_clear(priv, P_IRQ_MASK(off)); 252 } 253 254 static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv, 255 int port) 256 { 257 unsigned int off; 258 259 switch (port) { 260 case 7: 261 off = P7_IRQ_OFF; 262 break; 263 case 0: 264 /* Port 0 interrupts are located on the first bank */ 265 intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF)); 266 intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR); 267 return; 268 default: 269 off = P_IRQ_OFF(port); 270 break; 271 } 272 273 intrl2_1_mask_set(priv, P_IRQ_MASK(off)); 274 intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR); 275 } 276 277 static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, 278 struct phy_device *phy) 279 { 280 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 281 unsigned int i; 282 u32 reg; 283 284 if (!dsa_is_user_port(ds, port)) 285 return 0; 286 287 priv->port_sts[port].enabled = true; 288 289 bcm_sf2_recalc_clock(ds); 290 291 /* Clear the memory power down */ 292 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); 293 reg &= ~P_TXQ_PSM_VDD(port); 294 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); 295 296 /* Enable Broadcom tags for that port if requested */ 297 if (priv->brcm_tag_mask & BIT(port)) 298 b53_brcm_hdr_setup(ds, port); 299 300 /* Configure Traffic Class to QoS mapping, allow each priority to map 301 * to a different queue number 302 */ 303 reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port)); 304 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) 305 reg |= i << (PRT_TO_QID_SHIFT * i); 306 core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port)); 307 308 /* Re-enable the GPHY and re-apply workarounds */ 309 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) { 310 bcm_sf2_gphy_enable_set(ds, true); 311 if (phy) { 312 /* if phy_stop() has been called before, phy 313 * will be in halted state, and phy_start() 314 * will call resume. 315 * 316 * the resume path does not configure back 317 * autoneg settings, and since we hard reset 318 * the phy manually here, we need to reset the 319 * state machine also. 320 */ 321 phy->state = PHY_READY; 322 phy_init_hw(phy); 323 } 324 } 325 326 /* Enable MoCA port interrupts to get notified */ 327 if (port == priv->moca_port) 328 bcm_sf2_port_intr_enable(priv, port); 329 330 /* Set per-queue pause threshold to 32 */ 331 core_writel(priv, 32, CORE_TXQ_THD_PAUSE_QN_PORT(port)); 332 333 /* Set ACB threshold to 24 */ 334 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) { 335 reg = acb_readl(priv, ACB_QUEUE_CFG(port * 336 SF2_NUM_EGRESS_QUEUES + i)); 337 reg &= ~XOFF_THRESHOLD_MASK; 338 reg |= 24; 339 acb_writel(priv, reg, ACB_QUEUE_CFG(port * 340 SF2_NUM_EGRESS_QUEUES + i)); 341 } 342 343 return b53_enable_port(ds, port, phy); 344 } 345 346 static void bcm_sf2_port_disable(struct dsa_switch *ds, int port) 347 { 348 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 349 u32 reg; 350 351 /* Disable learning while in WoL mode */ 352 if (priv->wol_ports_mask & (1 << port)) { 353 reg = core_readl(priv, CORE_DIS_LEARN); 354 reg |= BIT(port); 355 core_writel(priv, reg, CORE_DIS_LEARN); 356 return; 357 } 358 359 if (port == priv->moca_port) 360 bcm_sf2_port_intr_disable(priv, port); 361 362 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) 363 bcm_sf2_gphy_enable_set(ds, false); 364 365 b53_disable_port(ds, port); 366 367 /* Power down the port memory */ 368 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); 369 reg |= P_TXQ_PSM_VDD(port); 370 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); 371 372 priv->port_sts[port].enabled = false; 373 374 bcm_sf2_recalc_clock(ds); 375 } 376 377 378 static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr, 379 int regnum, u16 val) 380 { 381 int ret = 0; 382 u32 reg; 383 384 reg = reg_readl(priv, REG_SWITCH_CNTRL); 385 reg |= MDIO_MASTER_SEL; 386 reg_writel(priv, reg, REG_SWITCH_CNTRL); 387 388 /* Page << 8 | offset */ 389 reg = 0x70; 390 reg <<= 2; 391 core_writel(priv, addr, reg); 392 393 /* Page << 8 | offset */ 394 reg = 0x80 << 8 | regnum << 1; 395 reg <<= 2; 396 397 if (op) 398 ret = core_readl(priv, reg); 399 else 400 core_writel(priv, val, reg); 401 402 reg = reg_readl(priv, REG_SWITCH_CNTRL); 403 reg &= ~MDIO_MASTER_SEL; 404 reg_writel(priv, reg, REG_SWITCH_CNTRL); 405 406 return ret & 0xffff; 407 } 408 409 static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum) 410 { 411 struct bcm_sf2_priv *priv = bus->priv; 412 413 /* Intercept reads from Broadcom pseudo-PHY address, else, send 414 * them to our master MDIO bus controller 415 */ 416 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr)) 417 return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0); 418 else 419 return mdiobus_read_nested(priv->master_mii_bus, addr, regnum); 420 } 421 422 static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum, 423 u16 val) 424 { 425 struct bcm_sf2_priv *priv = bus->priv; 426 427 /* Intercept writes to the Broadcom pseudo-PHY address, else, 428 * send them to our master MDIO bus controller 429 */ 430 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr)) 431 return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val); 432 else 433 return mdiobus_write_nested(priv->master_mii_bus, addr, 434 regnum, val); 435 } 436 437 static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id) 438 { 439 struct dsa_switch *ds = dev_id; 440 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 441 442 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & 443 ~priv->irq0_mask; 444 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); 445 446 return IRQ_HANDLED; 447 } 448 449 static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id) 450 { 451 struct dsa_switch *ds = dev_id; 452 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 453 454 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & 455 ~priv->irq1_mask; 456 intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR); 457 458 if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) { 459 priv->port_sts[7].link = true; 460 dsa_port_phylink_mac_change(ds, 7, true); 461 } 462 if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) { 463 priv->port_sts[7].link = false; 464 dsa_port_phylink_mac_change(ds, 7, false); 465 } 466 467 return IRQ_HANDLED; 468 } 469 470 static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv) 471 { 472 unsigned int timeout = 1000; 473 u32 reg; 474 int ret; 475 476 /* The watchdog reset does not work on 7278, we need to hit the 477 * "external" reset line through the reset controller. 478 */ 479 if (priv->type == BCM7278_DEVICE_ID) { 480 ret = reset_control_assert(priv->rcdev); 481 if (ret) 482 return ret; 483 484 return reset_control_deassert(priv->rcdev); 485 } 486 487 reg = core_readl(priv, CORE_WATCHDOG_CTRL); 488 reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET; 489 core_writel(priv, reg, CORE_WATCHDOG_CTRL); 490 491 do { 492 reg = core_readl(priv, CORE_WATCHDOG_CTRL); 493 if (!(reg & SOFTWARE_RESET)) 494 break; 495 496 usleep_range(1000, 2000); 497 } while (timeout-- > 0); 498 499 if (timeout == 0) 500 return -ETIMEDOUT; 501 502 return 0; 503 } 504 505 static void bcm_sf2_crossbar_setup(struct bcm_sf2_priv *priv) 506 { 507 struct device *dev = priv->dev->ds->dev; 508 int shift; 509 u32 mask; 510 u32 reg; 511 int i; 512 513 mask = BIT(priv->num_crossbar_int_ports) - 1; 514 515 reg = reg_readl(priv, REG_CROSSBAR); 516 switch (priv->type) { 517 case BCM4908_DEVICE_ID: 518 shift = CROSSBAR_BCM4908_INT_P7 * priv->num_crossbar_int_ports; 519 reg &= ~(mask << shift); 520 if (0) /* FIXME */ 521 reg |= CROSSBAR_BCM4908_EXT_SERDES << shift; 522 else if (priv->int_phy_mask & BIT(7)) 523 reg |= CROSSBAR_BCM4908_EXT_GPHY4 << shift; 524 else if (phy_interface_mode_is_rgmii(priv->port_sts[7].mode)) 525 reg |= CROSSBAR_BCM4908_EXT_RGMII << shift; 526 else if (WARN(1, "Invalid port mode\n")) 527 return; 528 break; 529 default: 530 return; 531 } 532 reg_writel(priv, reg, REG_CROSSBAR); 533 534 reg = reg_readl(priv, REG_CROSSBAR); 535 for (i = 0; i < priv->num_crossbar_int_ports; i++) { 536 shift = i * priv->num_crossbar_int_ports; 537 538 dev_dbg(dev, "crossbar int port #%d - ext port #%d\n", i, 539 (reg >> shift) & mask); 540 } 541 } 542 543 static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv) 544 { 545 intrl2_0_mask_set(priv, 0xffffffff); 546 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 547 intrl2_1_mask_set(priv, 0xffffffff); 548 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 549 } 550 551 static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv, 552 struct device_node *dn) 553 { 554 struct device *dev = priv->dev->ds->dev; 555 struct bcm_sf2_port_status *port_st; 556 struct device_node *port; 557 unsigned int port_num; 558 struct property *prop; 559 int err; 560 561 priv->moca_port = -1; 562 563 for_each_available_child_of_node(dn, port) { 564 if (of_property_read_u32(port, "reg", &port_num)) 565 continue; 566 567 if (port_num >= DSA_MAX_PORTS) { 568 dev_err(dev, "Invalid port number %d\n", port_num); 569 continue; 570 } 571 572 port_st = &priv->port_sts[port_num]; 573 574 /* Internal PHYs get assigned a specific 'phy-mode' property 575 * value: "internal" to help flag them before MDIO probing 576 * has completed, since they might be turned off at that 577 * time 578 */ 579 err = of_get_phy_mode(port, &port_st->mode); 580 if (err) 581 continue; 582 583 if (port_st->mode == PHY_INTERFACE_MODE_INTERNAL) 584 priv->int_phy_mask |= 1 << port_num; 585 586 if (port_st->mode == PHY_INTERFACE_MODE_MOCA) 587 priv->moca_port = port_num; 588 589 if (of_property_read_bool(port, "brcm,use-bcm-hdr")) 590 priv->brcm_tag_mask |= 1 << port_num; 591 592 /* Ensure that port 5 is not picked up as a DSA CPU port 593 * flavour but a regular port instead. We should be using 594 * devlink to be able to set the port flavour. 595 */ 596 if (port_num == 5 && priv->type == BCM7278_DEVICE_ID) { 597 prop = of_find_property(port, "ethernet", NULL); 598 if (prop) 599 of_remove_property(port, prop); 600 } 601 } 602 } 603 604 static int bcm_sf2_mdio_register(struct dsa_switch *ds) 605 { 606 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 607 struct device_node *dn, *child; 608 struct phy_device *phydev; 609 struct property *prop; 610 static int index; 611 int err, reg; 612 613 /* Find our integrated MDIO bus node */ 614 dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio"); 615 priv->master_mii_bus = of_mdio_find_bus(dn); 616 if (!priv->master_mii_bus) { 617 of_node_put(dn); 618 return -EPROBE_DEFER; 619 } 620 621 get_device(&priv->master_mii_bus->dev); 622 priv->master_mii_dn = dn; 623 624 priv->slave_mii_bus = mdiobus_alloc(); 625 if (!priv->slave_mii_bus) { 626 of_node_put(dn); 627 return -ENOMEM; 628 } 629 630 priv->slave_mii_bus->priv = priv; 631 priv->slave_mii_bus->name = "sf2 slave mii"; 632 priv->slave_mii_bus->read = bcm_sf2_sw_mdio_read; 633 priv->slave_mii_bus->write = bcm_sf2_sw_mdio_write; 634 snprintf(priv->slave_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d", 635 index++); 636 priv->slave_mii_bus->dev.of_node = dn; 637 638 /* Include the pseudo-PHY address to divert reads towards our 639 * workaround. This is only required for 7445D0, since 7445E0 640 * disconnects the internal switch pseudo-PHY such that we can use the 641 * regular SWITCH_MDIO master controller instead. 642 * 643 * Here we flag the pseudo PHY as needing special treatment and would 644 * otherwise make all other PHY read/writes go to the master MDIO bus 645 * controller that comes with this switch backed by the "mdio-unimac" 646 * driver. 647 */ 648 if (of_machine_is_compatible("brcm,bcm7445d0")) 649 priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0); 650 else 651 priv->indir_phy_mask = 0; 652 653 ds->phys_mii_mask = priv->indir_phy_mask; 654 ds->slave_mii_bus = priv->slave_mii_bus; 655 priv->slave_mii_bus->parent = ds->dev->parent; 656 priv->slave_mii_bus->phy_mask = ~priv->indir_phy_mask; 657 658 /* We need to make sure that of_phy_connect() will not work by 659 * removing the 'phandle' and 'linux,phandle' properties and 660 * unregister the existing PHY device that was already registered. 661 */ 662 for_each_available_child_of_node(dn, child) { 663 if (of_property_read_u32(child, "reg", ®) || 664 reg >= PHY_MAX_ADDR) 665 continue; 666 667 if (!(priv->indir_phy_mask & BIT(reg))) 668 continue; 669 670 prop = of_find_property(child, "phandle", NULL); 671 if (prop) 672 of_remove_property(child, prop); 673 674 prop = of_find_property(child, "linux,phandle", NULL); 675 if (prop) 676 of_remove_property(child, prop); 677 678 phydev = of_phy_find_device(child); 679 if (phydev) 680 phy_device_remove(phydev); 681 } 682 683 err = mdiobus_register(priv->slave_mii_bus); 684 if (err && dn) { 685 mdiobus_free(priv->slave_mii_bus); 686 of_node_put(dn); 687 } 688 689 return err; 690 } 691 692 static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv) 693 { 694 mdiobus_unregister(priv->slave_mii_bus); 695 mdiobus_free(priv->slave_mii_bus); 696 of_node_put(priv->master_mii_dn); 697 } 698 699 static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port) 700 { 701 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 702 703 /* The BCM7xxx PHY driver expects to find the integrated PHY revision 704 * in bits 15:8 and the patch level in bits 7:0 which is exactly what 705 * the REG_PHY_REVISION register layout is. 706 */ 707 if (priv->int_phy_mask & BIT(port)) 708 return priv->hw_params.gphy_rev; 709 else 710 return PHY_BRCM_AUTO_PWRDWN_ENABLE | 711 PHY_BRCM_DIS_TXCRXC_NOENRGY | 712 PHY_BRCM_IDDQ_SUSPEND; 713 } 714 715 static void bcm_sf2_sw_validate(struct dsa_switch *ds, int port, 716 unsigned long *supported, 717 struct phylink_link_state *state) 718 { 719 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 720 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 721 722 if (!phy_interface_mode_is_rgmii(state->interface) && 723 state->interface != PHY_INTERFACE_MODE_MII && 724 state->interface != PHY_INTERFACE_MODE_REVMII && 725 state->interface != PHY_INTERFACE_MODE_GMII && 726 state->interface != PHY_INTERFACE_MODE_INTERNAL && 727 state->interface != PHY_INTERFACE_MODE_MOCA) { 728 linkmode_zero(supported); 729 if (port != core_readl(priv, CORE_IMP0_PRT_ID)) 730 dev_err(ds->dev, 731 "Unsupported interface: %d for port %d\n", 732 state->interface, port); 733 return; 734 } 735 736 /* Allow all the expected bits */ 737 phylink_set(mask, Autoneg); 738 phylink_set_port_modes(mask); 739 phylink_set(mask, Pause); 740 phylink_set(mask, Asym_Pause); 741 742 /* With the exclusion of MII and Reverse MII, we support Gigabit, 743 * including Half duplex 744 */ 745 if (state->interface != PHY_INTERFACE_MODE_MII && 746 state->interface != PHY_INTERFACE_MODE_REVMII) { 747 phylink_set(mask, 1000baseT_Full); 748 phylink_set(mask, 1000baseT_Half); 749 } 750 751 phylink_set(mask, 10baseT_Half); 752 phylink_set(mask, 10baseT_Full); 753 phylink_set(mask, 100baseT_Half); 754 phylink_set(mask, 100baseT_Full); 755 756 linkmode_and(supported, supported, mask); 757 linkmode_and(state->advertising, state->advertising, mask); 758 } 759 760 static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port, 761 unsigned int mode, 762 const struct phylink_link_state *state) 763 { 764 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 765 u32 id_mode_dis = 0, port_mode; 766 u32 reg_rgmii_ctrl; 767 u32 reg; 768 769 if (port == core_readl(priv, CORE_IMP0_PRT_ID)) 770 return; 771 772 switch (state->interface) { 773 case PHY_INTERFACE_MODE_RGMII: 774 id_mode_dis = 1; 775 fallthrough; 776 case PHY_INTERFACE_MODE_RGMII_TXID: 777 port_mode = EXT_GPHY; 778 break; 779 case PHY_INTERFACE_MODE_MII: 780 port_mode = EXT_EPHY; 781 break; 782 case PHY_INTERFACE_MODE_REVMII: 783 port_mode = EXT_REVMII; 784 break; 785 default: 786 /* Nothing required for all other PHYs: internal and MoCA */ 787 return; 788 } 789 790 reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port); 791 792 /* Clear id_mode_dis bit, and the existing port mode, let 793 * RGMII_MODE_EN bet set by mac_link_{up,down} 794 */ 795 reg = reg_readl(priv, reg_rgmii_ctrl); 796 reg &= ~ID_MODE_DIS; 797 reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT); 798 799 reg |= port_mode; 800 if (id_mode_dis) 801 reg |= ID_MODE_DIS; 802 803 reg_writel(priv, reg, reg_rgmii_ctrl); 804 } 805 806 static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port, 807 phy_interface_t interface, bool link) 808 { 809 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 810 u32 reg_rgmii_ctrl; 811 u32 reg; 812 813 if (!phy_interface_mode_is_rgmii(interface) && 814 interface != PHY_INTERFACE_MODE_MII && 815 interface != PHY_INTERFACE_MODE_REVMII) 816 return; 817 818 reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port); 819 820 /* If the link is down, just disable the interface to conserve power */ 821 reg = reg_readl(priv, reg_rgmii_ctrl); 822 if (link) 823 reg |= RGMII_MODE_EN; 824 else 825 reg &= ~RGMII_MODE_EN; 826 reg_writel(priv, reg, reg_rgmii_ctrl); 827 } 828 829 static void bcm_sf2_sw_mac_link_down(struct dsa_switch *ds, int port, 830 unsigned int mode, 831 phy_interface_t interface) 832 { 833 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 834 u32 reg, offset; 835 836 if (port != core_readl(priv, CORE_IMP0_PRT_ID)) { 837 if (priv->type == BCM4908_DEVICE_ID || 838 priv->type == BCM7445_DEVICE_ID) 839 offset = CORE_STS_OVERRIDE_GMIIP_PORT(port); 840 else 841 offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port); 842 843 reg = core_readl(priv, offset); 844 reg &= ~LINK_STS; 845 core_writel(priv, reg, offset); 846 } 847 848 bcm_sf2_sw_mac_link_set(ds, port, interface, false); 849 } 850 851 static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port, 852 unsigned int mode, 853 phy_interface_t interface, 854 struct phy_device *phydev, 855 int speed, int duplex, 856 bool tx_pause, bool rx_pause) 857 { 858 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 859 struct ethtool_eee *p = &priv->dev->ports[port].eee; 860 861 bcm_sf2_sw_mac_link_set(ds, port, interface, true); 862 863 if (port != core_readl(priv, CORE_IMP0_PRT_ID)) { 864 u32 reg_rgmii_ctrl = 0; 865 u32 reg, offset; 866 867 if (priv->type == BCM4908_DEVICE_ID || 868 priv->type == BCM7445_DEVICE_ID) 869 offset = CORE_STS_OVERRIDE_GMIIP_PORT(port); 870 else 871 offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port); 872 873 if (interface == PHY_INTERFACE_MODE_RGMII || 874 interface == PHY_INTERFACE_MODE_RGMII_TXID || 875 interface == PHY_INTERFACE_MODE_MII || 876 interface == PHY_INTERFACE_MODE_REVMII) { 877 reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port); 878 reg = reg_readl(priv, reg_rgmii_ctrl); 879 reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN); 880 881 if (tx_pause) 882 reg |= TX_PAUSE_EN; 883 if (rx_pause) 884 reg |= RX_PAUSE_EN; 885 886 reg_writel(priv, reg, reg_rgmii_ctrl); 887 } 888 889 reg = SW_OVERRIDE | LINK_STS; 890 switch (speed) { 891 case SPEED_1000: 892 reg |= SPDSTS_1000 << SPEED_SHIFT; 893 break; 894 case SPEED_100: 895 reg |= SPDSTS_100 << SPEED_SHIFT; 896 break; 897 } 898 899 if (duplex == DUPLEX_FULL) 900 reg |= DUPLX_MODE; 901 902 core_writel(priv, reg, offset); 903 } 904 905 if (mode == MLO_AN_PHY && phydev) 906 p->eee_enabled = b53_eee_init(ds, port, phydev); 907 } 908 909 static void bcm_sf2_sw_fixed_state(struct dsa_switch *ds, int port, 910 struct phylink_link_state *status) 911 { 912 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 913 914 status->link = false; 915 916 /* MoCA port is special as we do not get link status from CORE_LNKSTS, 917 * which means that we need to force the link at the port override 918 * level to get the data to flow. We do use what the interrupt handler 919 * did determine before. 920 * 921 * For the other ports, we just force the link status, since this is 922 * a fixed PHY device. 923 */ 924 if (port == priv->moca_port) { 925 status->link = priv->port_sts[port].link; 926 /* For MoCA interfaces, also force a link down notification 927 * since some version of the user-space daemon (mocad) use 928 * cmd->autoneg to force the link, which messes up the PHY 929 * state machine and make it go in PHY_FORCING state instead. 930 */ 931 if (!status->link) 932 netif_carrier_off(dsa_to_port(ds, port)->slave); 933 status->duplex = DUPLEX_FULL; 934 } else { 935 status->link = true; 936 } 937 } 938 939 static void bcm_sf2_enable_acb(struct dsa_switch *ds) 940 { 941 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 942 u32 reg; 943 944 /* Enable ACB globally */ 945 reg = acb_readl(priv, ACB_CONTROL); 946 reg |= (ACB_FLUSH_MASK << ACB_FLUSH_SHIFT); 947 acb_writel(priv, reg, ACB_CONTROL); 948 reg &= ~(ACB_FLUSH_MASK << ACB_FLUSH_SHIFT); 949 reg |= ACB_EN | ACB_ALGORITHM; 950 acb_writel(priv, reg, ACB_CONTROL); 951 } 952 953 static int bcm_sf2_sw_suspend(struct dsa_switch *ds) 954 { 955 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 956 unsigned int port; 957 958 bcm_sf2_intr_disable(priv); 959 960 /* Disable all ports physically present including the IMP 961 * port, the other ones have already been disabled during 962 * bcm_sf2_sw_setup 963 */ 964 for (port = 0; port < ds->num_ports; port++) { 965 if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port)) 966 bcm_sf2_port_disable(ds, port); 967 } 968 969 if (!priv->wol_ports_mask) 970 clk_disable_unprepare(priv->clk); 971 972 return 0; 973 } 974 975 static int bcm_sf2_sw_resume(struct dsa_switch *ds) 976 { 977 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 978 int ret; 979 980 if (!priv->wol_ports_mask) 981 clk_prepare_enable(priv->clk); 982 983 ret = bcm_sf2_sw_rst(priv); 984 if (ret) { 985 pr_err("%s: failed to software reset switch\n", __func__); 986 return ret; 987 } 988 989 bcm_sf2_crossbar_setup(priv); 990 991 ret = bcm_sf2_cfp_resume(ds); 992 if (ret) 993 return ret; 994 995 if (priv->hw_params.num_gphy == 1) 996 bcm_sf2_gphy_enable_set(ds, true); 997 998 ds->ops->setup(ds); 999 1000 return 0; 1001 } 1002 1003 static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port, 1004 struct ethtool_wolinfo *wol) 1005 { 1006 struct net_device *p = dsa_to_port(ds, port)->cpu_dp->master; 1007 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 1008 struct ethtool_wolinfo pwol = { }; 1009 1010 /* Get the parent device WoL settings */ 1011 if (p->ethtool_ops->get_wol) 1012 p->ethtool_ops->get_wol(p, &pwol); 1013 1014 /* Advertise the parent device supported settings */ 1015 wol->supported = pwol.supported; 1016 memset(&wol->sopass, 0, sizeof(wol->sopass)); 1017 1018 if (pwol.wolopts & WAKE_MAGICSECURE) 1019 memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass)); 1020 1021 if (priv->wol_ports_mask & (1 << port)) 1022 wol->wolopts = pwol.wolopts; 1023 else 1024 wol->wolopts = 0; 1025 } 1026 1027 static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port, 1028 struct ethtool_wolinfo *wol) 1029 { 1030 struct net_device *p = dsa_to_port(ds, port)->cpu_dp->master; 1031 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 1032 s8 cpu_port = dsa_to_port(ds, port)->cpu_dp->index; 1033 struct ethtool_wolinfo pwol = { }; 1034 1035 if (p->ethtool_ops->get_wol) 1036 p->ethtool_ops->get_wol(p, &pwol); 1037 if (wol->wolopts & ~pwol.supported) 1038 return -EINVAL; 1039 1040 if (wol->wolopts) 1041 priv->wol_ports_mask |= (1 << port); 1042 else 1043 priv->wol_ports_mask &= ~(1 << port); 1044 1045 /* If we have at least one port enabled, make sure the CPU port 1046 * is also enabled. If the CPU port is the last one enabled, we disable 1047 * it since this configuration does not make sense. 1048 */ 1049 if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port)) 1050 priv->wol_ports_mask |= (1 << cpu_port); 1051 else 1052 priv->wol_ports_mask &= ~(1 << cpu_port); 1053 1054 return p->ethtool_ops->set_wol(p, wol); 1055 } 1056 1057 static int bcm_sf2_sw_setup(struct dsa_switch *ds) 1058 { 1059 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 1060 unsigned int port; 1061 1062 /* Enable all valid ports and disable those unused */ 1063 for (port = 0; port < priv->hw_params.num_ports; port++) { 1064 /* IMP port receives special treatment */ 1065 if (dsa_is_user_port(ds, port)) 1066 bcm_sf2_port_setup(ds, port, NULL); 1067 else if (dsa_is_cpu_port(ds, port)) 1068 bcm_sf2_imp_setup(ds, port); 1069 else 1070 bcm_sf2_port_disable(ds, port); 1071 } 1072 1073 b53_configure_vlan(ds); 1074 bcm_sf2_enable_acb(ds); 1075 1076 return b53_setup_devlink_resources(ds); 1077 } 1078 1079 static void bcm_sf2_sw_teardown(struct dsa_switch *ds) 1080 { 1081 dsa_devlink_resources_unregister(ds); 1082 } 1083 1084 /* The SWITCH_CORE register space is managed by b53 but operates on a page + 1085 * register basis so we need to translate that into an address that the 1086 * bus-glue understands. 1087 */ 1088 #define SF2_PAGE_REG_MKADDR(page, reg) ((page) << 10 | (reg) << 2) 1089 1090 static int bcm_sf2_core_read8(struct b53_device *dev, u8 page, u8 reg, 1091 u8 *val) 1092 { 1093 struct bcm_sf2_priv *priv = dev->priv; 1094 1095 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); 1096 1097 return 0; 1098 } 1099 1100 static int bcm_sf2_core_read16(struct b53_device *dev, u8 page, u8 reg, 1101 u16 *val) 1102 { 1103 struct bcm_sf2_priv *priv = dev->priv; 1104 1105 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); 1106 1107 return 0; 1108 } 1109 1110 static int bcm_sf2_core_read32(struct b53_device *dev, u8 page, u8 reg, 1111 u32 *val) 1112 { 1113 struct bcm_sf2_priv *priv = dev->priv; 1114 1115 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); 1116 1117 return 0; 1118 } 1119 1120 static int bcm_sf2_core_read64(struct b53_device *dev, u8 page, u8 reg, 1121 u64 *val) 1122 { 1123 struct bcm_sf2_priv *priv = dev->priv; 1124 1125 *val = core_readq(priv, SF2_PAGE_REG_MKADDR(page, reg)); 1126 1127 return 0; 1128 } 1129 1130 static int bcm_sf2_core_write8(struct b53_device *dev, u8 page, u8 reg, 1131 u8 value) 1132 { 1133 struct bcm_sf2_priv *priv = dev->priv; 1134 1135 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1136 1137 return 0; 1138 } 1139 1140 static int bcm_sf2_core_write16(struct b53_device *dev, u8 page, u8 reg, 1141 u16 value) 1142 { 1143 struct bcm_sf2_priv *priv = dev->priv; 1144 1145 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1146 1147 return 0; 1148 } 1149 1150 static int bcm_sf2_core_write32(struct b53_device *dev, u8 page, u8 reg, 1151 u32 value) 1152 { 1153 struct bcm_sf2_priv *priv = dev->priv; 1154 1155 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1156 1157 return 0; 1158 } 1159 1160 static int bcm_sf2_core_write64(struct b53_device *dev, u8 page, u8 reg, 1161 u64 value) 1162 { 1163 struct bcm_sf2_priv *priv = dev->priv; 1164 1165 core_writeq(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1166 1167 return 0; 1168 } 1169 1170 static const struct b53_io_ops bcm_sf2_io_ops = { 1171 .read8 = bcm_sf2_core_read8, 1172 .read16 = bcm_sf2_core_read16, 1173 .read32 = bcm_sf2_core_read32, 1174 .read48 = bcm_sf2_core_read64, 1175 .read64 = bcm_sf2_core_read64, 1176 .write8 = bcm_sf2_core_write8, 1177 .write16 = bcm_sf2_core_write16, 1178 .write32 = bcm_sf2_core_write32, 1179 .write48 = bcm_sf2_core_write64, 1180 .write64 = bcm_sf2_core_write64, 1181 }; 1182 1183 static void bcm_sf2_sw_get_strings(struct dsa_switch *ds, int port, 1184 u32 stringset, uint8_t *data) 1185 { 1186 int cnt = b53_get_sset_count(ds, port, stringset); 1187 1188 b53_get_strings(ds, port, stringset, data); 1189 bcm_sf2_cfp_get_strings(ds, port, stringset, 1190 data + cnt * ETH_GSTRING_LEN); 1191 } 1192 1193 static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds, int port, 1194 uint64_t *data) 1195 { 1196 int cnt = b53_get_sset_count(ds, port, ETH_SS_STATS); 1197 1198 b53_get_ethtool_stats(ds, port, data); 1199 bcm_sf2_cfp_get_ethtool_stats(ds, port, data + cnt); 1200 } 1201 1202 static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds, int port, 1203 int sset) 1204 { 1205 int cnt = b53_get_sset_count(ds, port, sset); 1206 1207 if (cnt < 0) 1208 return cnt; 1209 1210 cnt += bcm_sf2_cfp_get_sset_count(ds, port, sset); 1211 1212 return cnt; 1213 } 1214 1215 static const struct dsa_switch_ops bcm_sf2_ops = { 1216 .get_tag_protocol = b53_get_tag_protocol, 1217 .setup = bcm_sf2_sw_setup, 1218 .teardown = bcm_sf2_sw_teardown, 1219 .get_strings = bcm_sf2_sw_get_strings, 1220 .get_ethtool_stats = bcm_sf2_sw_get_ethtool_stats, 1221 .get_sset_count = bcm_sf2_sw_get_sset_count, 1222 .get_ethtool_phy_stats = b53_get_ethtool_phy_stats, 1223 .get_phy_flags = bcm_sf2_sw_get_phy_flags, 1224 .phylink_validate = bcm_sf2_sw_validate, 1225 .phylink_mac_config = bcm_sf2_sw_mac_config, 1226 .phylink_mac_link_down = bcm_sf2_sw_mac_link_down, 1227 .phylink_mac_link_up = bcm_sf2_sw_mac_link_up, 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 1257 struct 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 }; 1264 1265 static const u16 bcm_sf2_4908_reg_offsets[] = { 1266 [REG_SWITCH_CNTRL] = 0x00, 1267 [REG_SWITCH_STATUS] = 0x04, 1268 [REG_DIR_DATA_WRITE] = 0x08, 1269 [REG_DIR_DATA_READ] = 0x0c, 1270 [REG_SWITCH_REVISION] = 0x10, 1271 [REG_PHY_REVISION] = 0x14, 1272 [REG_SPHY_CNTRL] = 0x24, 1273 [REG_CROSSBAR] = 0xc8, 1274 [REG_RGMII_11_CNTRL] = 0x014c, 1275 [REG_LED_0_CNTRL] = 0x40, 1276 [REG_LED_1_CNTRL] = 0x4c, 1277 [REG_LED_2_CNTRL] = 0x58, 1278 [REG_LED_3_CNTRL] = 0x64, 1279 [REG_LED_4_CNTRL] = 0x88, 1280 [REG_LED_5_CNTRL] = 0xa0, 1281 [REG_LED_AGGREGATE_CTRL] = 0xb8, 1282 1283 }; 1284 1285 static const struct bcm_sf2_of_data bcm_sf2_4908_data = { 1286 .type = BCM4908_DEVICE_ID, 1287 .core_reg_align = 0, 1288 .reg_offsets = bcm_sf2_4908_reg_offsets, 1289 .num_cfp_rules = 256, 1290 .num_crossbar_int_ports = 2, 1291 }; 1292 1293 /* Register offsets for the SWITCH_REG_* block */ 1294 static const u16 bcm_sf2_7445_reg_offsets[] = { 1295 [REG_SWITCH_CNTRL] = 0x00, 1296 [REG_SWITCH_STATUS] = 0x04, 1297 [REG_DIR_DATA_WRITE] = 0x08, 1298 [REG_DIR_DATA_READ] = 0x0C, 1299 [REG_SWITCH_REVISION] = 0x18, 1300 [REG_PHY_REVISION] = 0x1C, 1301 [REG_SPHY_CNTRL] = 0x2C, 1302 [REG_RGMII_0_CNTRL] = 0x34, 1303 [REG_RGMII_1_CNTRL] = 0x40, 1304 [REG_RGMII_2_CNTRL] = 0x4c, 1305 [REG_LED_0_CNTRL] = 0x90, 1306 [REG_LED_1_CNTRL] = 0x94, 1307 [REG_LED_2_CNTRL] = 0x98, 1308 }; 1309 1310 static const struct bcm_sf2_of_data bcm_sf2_7445_data = { 1311 .type = BCM7445_DEVICE_ID, 1312 .core_reg_align = 0, 1313 .reg_offsets = bcm_sf2_7445_reg_offsets, 1314 .num_cfp_rules = 256, 1315 }; 1316 1317 static const u16 bcm_sf2_7278_reg_offsets[] = { 1318 [REG_SWITCH_CNTRL] = 0x00, 1319 [REG_SWITCH_STATUS] = 0x04, 1320 [REG_DIR_DATA_WRITE] = 0x08, 1321 [REG_DIR_DATA_READ] = 0x0c, 1322 [REG_SWITCH_REVISION] = 0x10, 1323 [REG_PHY_REVISION] = 0x14, 1324 [REG_SPHY_CNTRL] = 0x24, 1325 [REG_RGMII_0_CNTRL] = 0xe0, 1326 [REG_RGMII_1_CNTRL] = 0xec, 1327 [REG_RGMII_2_CNTRL] = 0xf8, 1328 [REG_LED_0_CNTRL] = 0x40, 1329 [REG_LED_1_CNTRL] = 0x4c, 1330 [REG_LED_2_CNTRL] = 0x58, 1331 }; 1332 1333 static const struct bcm_sf2_of_data bcm_sf2_7278_data = { 1334 .type = BCM7278_DEVICE_ID, 1335 .core_reg_align = 1, 1336 .reg_offsets = bcm_sf2_7278_reg_offsets, 1337 .num_cfp_rules = 128, 1338 }; 1339 1340 static const struct of_device_id bcm_sf2_of_match[] = { 1341 { .compatible = "brcm,bcm4908-switch", 1342 .data = &bcm_sf2_4908_data 1343 }, 1344 { .compatible = "brcm,bcm7445-switch-v4.0", 1345 .data = &bcm_sf2_7445_data 1346 }, 1347 { .compatible = "brcm,bcm7278-switch-v4.0", 1348 .data = &bcm_sf2_7278_data 1349 }, 1350 { .compatible = "brcm,bcm7278-switch-v4.8", 1351 .data = &bcm_sf2_7278_data 1352 }, 1353 { /* sentinel */ }, 1354 }; 1355 MODULE_DEVICE_TABLE(of, bcm_sf2_of_match); 1356 1357 static int bcm_sf2_sw_probe(struct platform_device *pdev) 1358 { 1359 const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME; 1360 struct device_node *dn = pdev->dev.of_node; 1361 const struct of_device_id *of_id = NULL; 1362 const struct bcm_sf2_of_data *data; 1363 struct b53_platform_data *pdata; 1364 struct dsa_switch_ops *ops; 1365 struct device_node *ports; 1366 struct bcm_sf2_priv *priv; 1367 struct b53_device *dev; 1368 struct dsa_switch *ds; 1369 void __iomem **base; 1370 unsigned int i; 1371 u32 reg, rev; 1372 int ret; 1373 1374 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1375 if (!priv) 1376 return -ENOMEM; 1377 1378 ops = devm_kzalloc(&pdev->dev, sizeof(*ops), GFP_KERNEL); 1379 if (!ops) 1380 return -ENOMEM; 1381 1382 dev = b53_switch_alloc(&pdev->dev, &bcm_sf2_io_ops, priv); 1383 if (!dev) 1384 return -ENOMEM; 1385 1386 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 1387 if (!pdata) 1388 return -ENOMEM; 1389 1390 of_id = of_match_node(bcm_sf2_of_match, dn); 1391 if (!of_id || !of_id->data) 1392 return -EINVAL; 1393 1394 data = of_id->data; 1395 1396 /* Set SWITCH_REG register offsets and SWITCH_CORE align factor */ 1397 priv->type = data->type; 1398 priv->reg_offsets = data->reg_offsets; 1399 priv->core_reg_align = data->core_reg_align; 1400 priv->num_cfp_rules = data->num_cfp_rules; 1401 priv->num_crossbar_int_ports = data->num_crossbar_int_ports; 1402 1403 priv->rcdev = devm_reset_control_get_optional_exclusive(&pdev->dev, 1404 "switch"); 1405 if (IS_ERR(priv->rcdev)) 1406 return PTR_ERR(priv->rcdev); 1407 1408 /* Auto-detection using standard registers will not work, so 1409 * provide an indication of what kind of device we are for 1410 * b53_common to work with 1411 */ 1412 pdata->chip_id = priv->type; 1413 dev->pdata = pdata; 1414 1415 priv->dev = dev; 1416 ds = dev->ds; 1417 ds->ops = &bcm_sf2_ops; 1418 1419 /* Advertise the 8 egress queues */ 1420 ds->num_tx_queues = SF2_NUM_EGRESS_QUEUES; 1421 1422 dev_set_drvdata(&pdev->dev, priv); 1423 1424 spin_lock_init(&priv->indir_lock); 1425 mutex_init(&priv->cfp.lock); 1426 INIT_LIST_HEAD(&priv->cfp.rules_list); 1427 1428 /* CFP rule #0 cannot be used for specific classifications, flag it as 1429 * permanently used 1430 */ 1431 set_bit(0, priv->cfp.used); 1432 set_bit(0, priv->cfp.unique); 1433 1434 /* Balance of_node_put() done by of_find_node_by_name() */ 1435 of_node_get(dn); 1436 ports = of_find_node_by_name(dn, "ports"); 1437 if (ports) { 1438 bcm_sf2_identify_ports(priv, ports); 1439 of_node_put(ports); 1440 } 1441 1442 priv->irq0 = irq_of_parse_and_map(dn, 0); 1443 priv->irq1 = irq_of_parse_and_map(dn, 1); 1444 1445 base = &priv->core; 1446 for (i = 0; i < BCM_SF2_REGS_NUM; i++) { 1447 *base = devm_platform_ioremap_resource(pdev, i); 1448 if (IS_ERR(*base)) { 1449 pr_err("unable to find register: %s\n", reg_names[i]); 1450 return PTR_ERR(*base); 1451 } 1452 base++; 1453 } 1454 1455 priv->clk = devm_clk_get_optional(&pdev->dev, "sw_switch"); 1456 if (IS_ERR(priv->clk)) 1457 return PTR_ERR(priv->clk); 1458 1459 clk_prepare_enable(priv->clk); 1460 1461 priv->clk_mdiv = devm_clk_get_optional(&pdev->dev, "sw_switch_mdiv"); 1462 if (IS_ERR(priv->clk_mdiv)) { 1463 ret = PTR_ERR(priv->clk_mdiv); 1464 goto out_clk; 1465 } 1466 1467 clk_prepare_enable(priv->clk_mdiv); 1468 1469 ret = bcm_sf2_sw_rst(priv); 1470 if (ret) { 1471 pr_err("unable to software reset switch: %d\n", ret); 1472 goto out_clk_mdiv; 1473 } 1474 1475 bcm_sf2_crossbar_setup(priv); 1476 1477 bcm_sf2_gphy_enable_set(priv->dev->ds, true); 1478 1479 ret = bcm_sf2_mdio_register(ds); 1480 if (ret) { 1481 pr_err("failed to register MDIO bus\n"); 1482 goto out_clk_mdiv; 1483 } 1484 1485 bcm_sf2_gphy_enable_set(priv->dev->ds, false); 1486 1487 ret = bcm_sf2_cfp_rst(priv); 1488 if (ret) { 1489 pr_err("failed to reset CFP\n"); 1490 goto out_mdio; 1491 } 1492 1493 /* Disable all interrupts and request them */ 1494 bcm_sf2_intr_disable(priv); 1495 1496 ret = devm_request_irq(&pdev->dev, priv->irq0, bcm_sf2_switch_0_isr, 0, 1497 "switch_0", ds); 1498 if (ret < 0) { 1499 pr_err("failed to request switch_0 IRQ\n"); 1500 goto out_mdio; 1501 } 1502 1503 ret = devm_request_irq(&pdev->dev, priv->irq1, bcm_sf2_switch_1_isr, 0, 1504 "switch_1", ds); 1505 if (ret < 0) { 1506 pr_err("failed to request switch_1 IRQ\n"); 1507 goto out_mdio; 1508 } 1509 1510 /* Reset the MIB counters */ 1511 reg = core_readl(priv, CORE_GMNCFGCFG); 1512 reg |= RST_MIB_CNT; 1513 core_writel(priv, reg, CORE_GMNCFGCFG); 1514 reg &= ~RST_MIB_CNT; 1515 core_writel(priv, reg, CORE_GMNCFGCFG); 1516 1517 /* Get the maximum number of ports for this switch */ 1518 priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1; 1519 if (priv->hw_params.num_ports > DSA_MAX_PORTS) 1520 priv->hw_params.num_ports = DSA_MAX_PORTS; 1521 1522 /* Assume a single GPHY setup if we can't read that property */ 1523 if (of_property_read_u32(dn, "brcm,num-gphy", 1524 &priv->hw_params.num_gphy)) 1525 priv->hw_params.num_gphy = 1; 1526 1527 rev = reg_readl(priv, REG_SWITCH_REVISION); 1528 priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) & 1529 SWITCH_TOP_REV_MASK; 1530 priv->hw_params.core_rev = (rev & SF2_REV_MASK); 1531 1532 rev = reg_readl(priv, REG_PHY_REVISION); 1533 priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK; 1534 1535 ret = b53_switch_register(dev); 1536 if (ret) 1537 goto out_mdio; 1538 1539 dev_info(&pdev->dev, 1540 "Starfighter 2 top: %x.%02x, core: %x.%02x, IRQs: %d, %d\n", 1541 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff, 1542 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff, 1543 priv->irq0, priv->irq1); 1544 1545 return 0; 1546 1547 out_mdio: 1548 bcm_sf2_mdio_unregister(priv); 1549 out_clk_mdiv: 1550 clk_disable_unprepare(priv->clk_mdiv); 1551 out_clk: 1552 clk_disable_unprepare(priv->clk); 1553 return ret; 1554 } 1555 1556 static int bcm_sf2_sw_remove(struct platform_device *pdev) 1557 { 1558 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); 1559 1560 if (!priv) 1561 return 0; 1562 1563 priv->wol_ports_mask = 0; 1564 /* Disable interrupts */ 1565 bcm_sf2_intr_disable(priv); 1566 dsa_unregister_switch(priv->dev->ds); 1567 bcm_sf2_cfp_exit(priv->dev->ds); 1568 bcm_sf2_mdio_unregister(priv); 1569 clk_disable_unprepare(priv->clk_mdiv); 1570 clk_disable_unprepare(priv->clk); 1571 if (priv->type == BCM7278_DEVICE_ID) 1572 reset_control_assert(priv->rcdev); 1573 1574 platform_set_drvdata(pdev, NULL); 1575 1576 return 0; 1577 } 1578 1579 static void bcm_sf2_sw_shutdown(struct platform_device *pdev) 1580 { 1581 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); 1582 1583 if (!priv) 1584 return; 1585 1586 /* For a kernel about to be kexec'd we want to keep the GPHY on for a 1587 * successful MDIO bus scan to occur. If we did turn off the GPHY 1588 * before (e.g: port_disable), this will also power it back on. 1589 * 1590 * Do not rely on kexec_in_progress, just power the PHY on. 1591 */ 1592 if (priv->hw_params.num_gphy == 1) 1593 bcm_sf2_gphy_enable_set(priv->dev->ds, true); 1594 1595 dsa_switch_shutdown(priv->dev->ds); 1596 1597 platform_set_drvdata(pdev, NULL); 1598 } 1599 1600 #ifdef CONFIG_PM_SLEEP 1601 static int bcm_sf2_suspend(struct device *dev) 1602 { 1603 struct bcm_sf2_priv *priv = dev_get_drvdata(dev); 1604 1605 return dsa_switch_suspend(priv->dev->ds); 1606 } 1607 1608 static int bcm_sf2_resume(struct device *dev) 1609 { 1610 struct bcm_sf2_priv *priv = dev_get_drvdata(dev); 1611 1612 return dsa_switch_resume(priv->dev->ds); 1613 } 1614 #endif /* CONFIG_PM_SLEEP */ 1615 1616 static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops, 1617 bcm_sf2_suspend, bcm_sf2_resume); 1618 1619 1620 static struct platform_driver bcm_sf2_driver = { 1621 .probe = bcm_sf2_sw_probe, 1622 .remove = bcm_sf2_sw_remove, 1623 .shutdown = bcm_sf2_sw_shutdown, 1624 .driver = { 1625 .name = "brcm-sf2", 1626 .of_match_table = bcm_sf2_of_match, 1627 .pm = &bcm_sf2_pm_ops, 1628 }, 1629 }; 1630 module_platform_driver(bcm_sf2_driver); 1631 1632 MODULE_AUTHOR("Broadcom Corporation"); 1633 MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip"); 1634 MODULE_LICENSE("GPL"); 1635 MODULE_ALIAS("platform:brcm-sf2"); 1636