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 /* Return the number of active ports, not counting the IMP (CPU) port */ 36 static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds) 37 { 38 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 39 unsigned int port, count = 0; 40 41 for (port = 0; port < ARRAY_SIZE(priv->port_sts); port++) { 42 if (dsa_is_cpu_port(ds, port)) 43 continue; 44 if (priv->port_sts[port].enabled) 45 count++; 46 } 47 48 return count; 49 } 50 51 static void bcm_sf2_recalc_clock(struct dsa_switch *ds) 52 { 53 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 54 unsigned long new_rate; 55 unsigned int ports_active; 56 /* Frequenty in Mhz */ 57 static const unsigned long rate_table[] = { 58 59220000, 59 60820000, 60 62500000, 61 62500000, 62 }; 63 64 ports_active = bcm_sf2_num_active_ports(ds); 65 if (ports_active == 0 || !priv->clk_mdiv) 66 return; 67 68 /* If we overflow our table, just use the recommended operational 69 * frequency 70 */ 71 if (ports_active > ARRAY_SIZE(rate_table)) 72 new_rate = 90000000; 73 else 74 new_rate = rate_table[ports_active - 1]; 75 clk_set_rate(priv->clk_mdiv, new_rate); 76 } 77 78 static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port) 79 { 80 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 81 unsigned int i; 82 u32 reg, offset; 83 84 /* Enable the port memories */ 85 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); 86 reg &= ~P_TXQ_PSM_VDD(port); 87 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); 88 89 /* Enable forwarding */ 90 core_writel(priv, SW_FWDG_EN, CORE_SWMODE); 91 92 /* Enable IMP port in dumb mode */ 93 reg = core_readl(priv, CORE_SWITCH_CTRL); 94 reg |= MII_DUMB_FWDG_EN; 95 core_writel(priv, reg, CORE_SWITCH_CTRL); 96 97 /* Configure Traffic Class to QoS mapping, allow each priority to map 98 * to a different queue number 99 */ 100 reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port)); 101 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) 102 reg |= i << (PRT_TO_QID_SHIFT * i); 103 core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port)); 104 105 b53_brcm_hdr_setup(ds, port); 106 107 if (port == 8) { 108 if (priv->type == BCM7445_DEVICE_ID) 109 offset = CORE_STS_OVERRIDE_IMP; 110 else 111 offset = CORE_STS_OVERRIDE_IMP2; 112 113 /* Force link status for IMP port */ 114 reg = core_readl(priv, offset); 115 reg |= (MII_SW_OR | LINK_STS); 116 reg &= ~GMII_SPEED_UP_2G; 117 core_writel(priv, reg, offset); 118 119 /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */ 120 reg = core_readl(priv, CORE_IMP_CTL); 121 reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN); 122 reg &= ~(RX_DIS | TX_DIS); 123 core_writel(priv, reg, CORE_IMP_CTL); 124 } else { 125 reg = core_readl(priv, CORE_G_PCTL_PORT(port)); 126 reg &= ~(RX_DIS | TX_DIS); 127 core_writel(priv, reg, CORE_G_PCTL_PORT(port)); 128 } 129 130 priv->port_sts[port].enabled = true; 131 } 132 133 static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable) 134 { 135 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 136 u32 reg; 137 138 reg = reg_readl(priv, REG_SPHY_CNTRL); 139 if (enable) { 140 reg |= PHY_RESET; 141 reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | IDDQ_GLOBAL_PWR | CK25_DIS); 142 reg_writel(priv, reg, REG_SPHY_CNTRL); 143 udelay(21); 144 reg = reg_readl(priv, REG_SPHY_CNTRL); 145 reg &= ~PHY_RESET; 146 } else { 147 reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET; 148 reg_writel(priv, reg, REG_SPHY_CNTRL); 149 mdelay(1); 150 reg |= CK25_DIS; 151 } 152 reg_writel(priv, reg, REG_SPHY_CNTRL); 153 154 /* Use PHY-driven LED signaling */ 155 if (!enable) { 156 reg = reg_readl(priv, REG_LED_CNTRL(0)); 157 reg |= SPDLNK_SRC_SEL; 158 reg_writel(priv, reg, REG_LED_CNTRL(0)); 159 } 160 } 161 162 static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv, 163 int port) 164 { 165 unsigned int off; 166 167 switch (port) { 168 case 7: 169 off = P7_IRQ_OFF; 170 break; 171 case 0: 172 /* Port 0 interrupts are located on the first bank */ 173 intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF)); 174 return; 175 default: 176 off = P_IRQ_OFF(port); 177 break; 178 } 179 180 intrl2_1_mask_clear(priv, P_IRQ_MASK(off)); 181 } 182 183 static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv, 184 int port) 185 { 186 unsigned int off; 187 188 switch (port) { 189 case 7: 190 off = P7_IRQ_OFF; 191 break; 192 case 0: 193 /* Port 0 interrupts are located on the first bank */ 194 intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF)); 195 intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR); 196 return; 197 default: 198 off = P_IRQ_OFF(port); 199 break; 200 } 201 202 intrl2_1_mask_set(priv, P_IRQ_MASK(off)); 203 intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR); 204 } 205 206 static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, 207 struct phy_device *phy) 208 { 209 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 210 unsigned int i; 211 u32 reg; 212 213 if (!dsa_is_user_port(ds, port)) 214 return 0; 215 216 priv->port_sts[port].enabled = true; 217 218 bcm_sf2_recalc_clock(ds); 219 220 /* Clear the memory power down */ 221 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); 222 reg &= ~P_TXQ_PSM_VDD(port); 223 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); 224 225 /* Enable learning */ 226 reg = core_readl(priv, CORE_DIS_LEARN); 227 reg &= ~BIT(port); 228 core_writel(priv, reg, CORE_DIS_LEARN); 229 230 /* Enable Broadcom tags for that port if requested */ 231 if (priv->brcm_tag_mask & BIT(port)) { 232 b53_brcm_hdr_setup(ds, port); 233 234 /* Disable learning on ASP port */ 235 if (port == 7) { 236 reg = core_readl(priv, CORE_DIS_LEARN); 237 reg |= BIT(port); 238 core_writel(priv, reg, CORE_DIS_LEARN); 239 } 240 } 241 242 /* Configure Traffic Class to QoS mapping, allow each priority to map 243 * to a different queue number 244 */ 245 reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port)); 246 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) 247 reg |= i << (PRT_TO_QID_SHIFT * i); 248 core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port)); 249 250 /* Re-enable the GPHY and re-apply workarounds */ 251 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) { 252 bcm_sf2_gphy_enable_set(ds, true); 253 if (phy) { 254 /* if phy_stop() has been called before, phy 255 * will be in halted state, and phy_start() 256 * will call resume. 257 * 258 * the resume path does not configure back 259 * autoneg settings, and since we hard reset 260 * the phy manually here, we need to reset the 261 * state machine also. 262 */ 263 phy->state = PHY_READY; 264 phy_init_hw(phy); 265 } 266 } 267 268 /* Enable MoCA port interrupts to get notified */ 269 if (port == priv->moca_port) 270 bcm_sf2_port_intr_enable(priv, port); 271 272 /* Set per-queue pause threshold to 32 */ 273 core_writel(priv, 32, CORE_TXQ_THD_PAUSE_QN_PORT(port)); 274 275 /* Set ACB threshold to 24 */ 276 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) { 277 reg = acb_readl(priv, ACB_QUEUE_CFG(port * 278 SF2_NUM_EGRESS_QUEUES + i)); 279 reg &= ~XOFF_THRESHOLD_MASK; 280 reg |= 24; 281 acb_writel(priv, reg, ACB_QUEUE_CFG(port * 282 SF2_NUM_EGRESS_QUEUES + i)); 283 } 284 285 return b53_enable_port(ds, port, phy); 286 } 287 288 static void bcm_sf2_port_disable(struct dsa_switch *ds, int port) 289 { 290 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 291 u32 reg; 292 293 /* Disable learning while in WoL mode */ 294 if (priv->wol_ports_mask & (1 << port)) { 295 reg = core_readl(priv, CORE_DIS_LEARN); 296 reg |= BIT(port); 297 core_writel(priv, reg, CORE_DIS_LEARN); 298 return; 299 } 300 301 if (port == priv->moca_port) 302 bcm_sf2_port_intr_disable(priv, port); 303 304 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) 305 bcm_sf2_gphy_enable_set(ds, false); 306 307 b53_disable_port(ds, port); 308 309 /* Power down the port memory */ 310 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); 311 reg |= P_TXQ_PSM_VDD(port); 312 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); 313 314 priv->port_sts[port].enabled = false; 315 316 bcm_sf2_recalc_clock(ds); 317 } 318 319 320 static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr, 321 int regnum, u16 val) 322 { 323 int ret = 0; 324 u32 reg; 325 326 reg = reg_readl(priv, REG_SWITCH_CNTRL); 327 reg |= MDIO_MASTER_SEL; 328 reg_writel(priv, reg, REG_SWITCH_CNTRL); 329 330 /* Page << 8 | offset */ 331 reg = 0x70; 332 reg <<= 2; 333 core_writel(priv, addr, reg); 334 335 /* Page << 8 | offset */ 336 reg = 0x80 << 8 | regnum << 1; 337 reg <<= 2; 338 339 if (op) 340 ret = core_readl(priv, reg); 341 else 342 core_writel(priv, val, reg); 343 344 reg = reg_readl(priv, REG_SWITCH_CNTRL); 345 reg &= ~MDIO_MASTER_SEL; 346 reg_writel(priv, reg, REG_SWITCH_CNTRL); 347 348 return ret & 0xffff; 349 } 350 351 static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum) 352 { 353 struct bcm_sf2_priv *priv = bus->priv; 354 355 /* Intercept reads from Broadcom pseudo-PHY address, else, send 356 * them to our master MDIO bus controller 357 */ 358 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr)) 359 return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0); 360 else 361 return mdiobus_read_nested(priv->master_mii_bus, addr, regnum); 362 } 363 364 static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum, 365 u16 val) 366 { 367 struct bcm_sf2_priv *priv = bus->priv; 368 369 /* Intercept writes to the Broadcom pseudo-PHY address, else, 370 * send them to our master MDIO bus controller 371 */ 372 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr)) 373 return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val); 374 else 375 return mdiobus_write_nested(priv->master_mii_bus, addr, 376 regnum, val); 377 } 378 379 static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id) 380 { 381 struct dsa_switch *ds = dev_id; 382 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 383 384 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & 385 ~priv->irq0_mask; 386 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); 387 388 return IRQ_HANDLED; 389 } 390 391 static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id) 392 { 393 struct dsa_switch *ds = dev_id; 394 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 395 396 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & 397 ~priv->irq1_mask; 398 intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR); 399 400 if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) { 401 priv->port_sts[7].link = true; 402 dsa_port_phylink_mac_change(ds, 7, true); 403 } 404 if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) { 405 priv->port_sts[7].link = false; 406 dsa_port_phylink_mac_change(ds, 7, false); 407 } 408 409 return IRQ_HANDLED; 410 } 411 412 static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv) 413 { 414 unsigned int timeout = 1000; 415 u32 reg; 416 int ret; 417 418 /* The watchdog reset does not work on 7278, we need to hit the 419 * "external" reset line through the reset controller. 420 */ 421 if (priv->type == BCM7278_DEVICE_ID && !IS_ERR(priv->rcdev)) { 422 ret = reset_control_assert(priv->rcdev); 423 if (ret) 424 return ret; 425 426 return reset_control_deassert(priv->rcdev); 427 } 428 429 reg = core_readl(priv, CORE_WATCHDOG_CTRL); 430 reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET; 431 core_writel(priv, reg, CORE_WATCHDOG_CTRL); 432 433 do { 434 reg = core_readl(priv, CORE_WATCHDOG_CTRL); 435 if (!(reg & SOFTWARE_RESET)) 436 break; 437 438 usleep_range(1000, 2000); 439 } while (timeout-- > 0); 440 441 if (timeout == 0) 442 return -ETIMEDOUT; 443 444 return 0; 445 } 446 447 static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv) 448 { 449 intrl2_0_mask_set(priv, 0xffffffff); 450 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 451 intrl2_1_mask_set(priv, 0xffffffff); 452 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); 453 } 454 455 static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv, 456 struct device_node *dn) 457 { 458 struct device_node *port; 459 unsigned int port_num; 460 struct property *prop; 461 phy_interface_t mode; 462 int err; 463 464 priv->moca_port = -1; 465 466 for_each_available_child_of_node(dn, port) { 467 if (of_property_read_u32(port, "reg", &port_num)) 468 continue; 469 470 /* Internal PHYs get assigned a specific 'phy-mode' property 471 * value: "internal" to help flag them before MDIO probing 472 * has completed, since they might be turned off at that 473 * time 474 */ 475 err = of_get_phy_mode(port, &mode); 476 if (err) 477 continue; 478 479 if (mode == PHY_INTERFACE_MODE_INTERNAL) 480 priv->int_phy_mask |= 1 << port_num; 481 482 if (mode == PHY_INTERFACE_MODE_MOCA) 483 priv->moca_port = port_num; 484 485 if (of_property_read_bool(port, "brcm,use-bcm-hdr")) 486 priv->brcm_tag_mask |= 1 << port_num; 487 488 /* Ensure that port 5 is not picked up as a DSA CPU port 489 * flavour but a regular port instead. We should be using 490 * devlink to be able to set the port flavour. 491 */ 492 if (port_num == 5 && priv->type == BCM7278_DEVICE_ID) { 493 prop = of_find_property(port, "ethernet", NULL); 494 if (prop) 495 of_remove_property(port, prop); 496 } 497 } 498 } 499 500 static int bcm_sf2_mdio_register(struct dsa_switch *ds) 501 { 502 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 503 struct device_node *dn, *child; 504 struct phy_device *phydev; 505 struct property *prop; 506 static int index; 507 int err, reg; 508 509 /* Find our integrated MDIO bus node */ 510 dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio"); 511 priv->master_mii_bus = of_mdio_find_bus(dn); 512 if (!priv->master_mii_bus) { 513 of_node_put(dn); 514 return -EPROBE_DEFER; 515 } 516 517 get_device(&priv->master_mii_bus->dev); 518 priv->master_mii_dn = dn; 519 520 priv->slave_mii_bus = devm_mdiobus_alloc(ds->dev); 521 if (!priv->slave_mii_bus) { 522 of_node_put(dn); 523 return -ENOMEM; 524 } 525 526 priv->slave_mii_bus->priv = priv; 527 priv->slave_mii_bus->name = "sf2 slave mii"; 528 priv->slave_mii_bus->read = bcm_sf2_sw_mdio_read; 529 priv->slave_mii_bus->write = bcm_sf2_sw_mdio_write; 530 snprintf(priv->slave_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d", 531 index++); 532 priv->slave_mii_bus->dev.of_node = dn; 533 534 /* Include the pseudo-PHY address to divert reads towards our 535 * workaround. This is only required for 7445D0, since 7445E0 536 * disconnects the internal switch pseudo-PHY such that we can use the 537 * regular SWITCH_MDIO master controller instead. 538 * 539 * Here we flag the pseudo PHY as needing special treatment and would 540 * otherwise make all other PHY read/writes go to the master MDIO bus 541 * controller that comes with this switch backed by the "mdio-unimac" 542 * driver. 543 */ 544 if (of_machine_is_compatible("brcm,bcm7445d0")) 545 priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0); 546 else 547 priv->indir_phy_mask = 0; 548 549 ds->phys_mii_mask = priv->indir_phy_mask; 550 ds->slave_mii_bus = priv->slave_mii_bus; 551 priv->slave_mii_bus->parent = ds->dev->parent; 552 priv->slave_mii_bus->phy_mask = ~priv->indir_phy_mask; 553 554 /* We need to make sure that of_phy_connect() will not work by 555 * removing the 'phandle' and 'linux,phandle' properties and 556 * unregister the existing PHY device that was already registered. 557 */ 558 for_each_available_child_of_node(dn, child) { 559 if (of_property_read_u32(child, "reg", ®) || 560 reg >= PHY_MAX_ADDR) 561 continue; 562 563 if (!(priv->indir_phy_mask & BIT(reg))) 564 continue; 565 566 prop = of_find_property(child, "phandle", NULL); 567 if (prop) 568 of_remove_property(child, prop); 569 570 prop = of_find_property(child, "linux,phandle", NULL); 571 if (prop) 572 of_remove_property(child, prop); 573 574 phydev = of_phy_find_device(child); 575 if (phydev) 576 phy_device_remove(phydev); 577 } 578 579 err = mdiobus_register(priv->slave_mii_bus); 580 if (err && dn) 581 of_node_put(dn); 582 583 return err; 584 } 585 586 static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv) 587 { 588 mdiobus_unregister(priv->slave_mii_bus); 589 of_node_put(priv->master_mii_dn); 590 } 591 592 static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port) 593 { 594 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 595 596 /* The BCM7xxx PHY driver expects to find the integrated PHY revision 597 * in bits 15:8 and the patch level in bits 7:0 which is exactly what 598 * the REG_PHY_REVISION register layout is. 599 */ 600 601 return priv->hw_params.gphy_rev; 602 } 603 604 static void bcm_sf2_sw_validate(struct dsa_switch *ds, int port, 605 unsigned long *supported, 606 struct phylink_link_state *state) 607 { 608 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 609 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 610 611 if (!phy_interface_mode_is_rgmii(state->interface) && 612 state->interface != PHY_INTERFACE_MODE_MII && 613 state->interface != PHY_INTERFACE_MODE_REVMII && 614 state->interface != PHY_INTERFACE_MODE_GMII && 615 state->interface != PHY_INTERFACE_MODE_INTERNAL && 616 state->interface != PHY_INTERFACE_MODE_MOCA) { 617 bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 618 if (port != core_readl(priv, CORE_IMP0_PRT_ID)) 619 dev_err(ds->dev, 620 "Unsupported interface: %d for port %d\n", 621 state->interface, port); 622 return; 623 } 624 625 /* Allow all the expected bits */ 626 phylink_set(mask, Autoneg); 627 phylink_set_port_modes(mask); 628 phylink_set(mask, Pause); 629 phylink_set(mask, Asym_Pause); 630 631 /* With the exclusion of MII and Reverse MII, we support Gigabit, 632 * including Half duplex 633 */ 634 if (state->interface != PHY_INTERFACE_MODE_MII && 635 state->interface != PHY_INTERFACE_MODE_REVMII) { 636 phylink_set(mask, 1000baseT_Full); 637 phylink_set(mask, 1000baseT_Half); 638 } 639 640 phylink_set(mask, 10baseT_Half); 641 phylink_set(mask, 10baseT_Full); 642 phylink_set(mask, 100baseT_Half); 643 phylink_set(mask, 100baseT_Full); 644 645 bitmap_and(supported, supported, mask, 646 __ETHTOOL_LINK_MODE_MASK_NBITS); 647 bitmap_and(state->advertising, state->advertising, mask, 648 __ETHTOOL_LINK_MODE_MASK_NBITS); 649 } 650 651 static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port, 652 unsigned int mode, 653 const struct phylink_link_state *state) 654 { 655 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 656 u32 id_mode_dis = 0, port_mode; 657 u32 reg; 658 659 if (port == core_readl(priv, CORE_IMP0_PRT_ID)) 660 return; 661 662 switch (state->interface) { 663 case PHY_INTERFACE_MODE_RGMII: 664 id_mode_dis = 1; 665 fallthrough; 666 case PHY_INTERFACE_MODE_RGMII_TXID: 667 port_mode = EXT_GPHY; 668 break; 669 case PHY_INTERFACE_MODE_MII: 670 port_mode = EXT_EPHY; 671 break; 672 case PHY_INTERFACE_MODE_REVMII: 673 port_mode = EXT_REVMII; 674 break; 675 default: 676 /* Nothing required for all other PHYs: internal and MoCA */ 677 return; 678 } 679 680 /* Clear id_mode_dis bit, and the existing port mode, let 681 * RGMII_MODE_EN bet set by mac_link_{up,down} 682 */ 683 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); 684 reg &= ~ID_MODE_DIS; 685 reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT); 686 687 reg |= port_mode; 688 if (id_mode_dis) 689 reg |= ID_MODE_DIS; 690 691 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); 692 } 693 694 static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port, 695 phy_interface_t interface, bool link) 696 { 697 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 698 u32 reg; 699 700 if (!phy_interface_mode_is_rgmii(interface) && 701 interface != PHY_INTERFACE_MODE_MII && 702 interface != PHY_INTERFACE_MODE_REVMII) 703 return; 704 705 /* If the link is down, just disable the interface to conserve power */ 706 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); 707 if (link) 708 reg |= RGMII_MODE_EN; 709 else 710 reg &= ~RGMII_MODE_EN; 711 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); 712 } 713 714 static void bcm_sf2_sw_mac_link_down(struct dsa_switch *ds, int port, 715 unsigned int mode, 716 phy_interface_t interface) 717 { 718 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 719 u32 reg, offset; 720 721 if (port != core_readl(priv, CORE_IMP0_PRT_ID)) { 722 if (priv->type == BCM7445_DEVICE_ID) 723 offset = CORE_STS_OVERRIDE_GMIIP_PORT(port); 724 else 725 offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port); 726 727 reg = core_readl(priv, offset); 728 reg &= ~LINK_STS; 729 core_writel(priv, reg, offset); 730 } 731 732 bcm_sf2_sw_mac_link_set(ds, port, interface, false); 733 } 734 735 static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port, 736 unsigned int mode, 737 phy_interface_t interface, 738 struct phy_device *phydev, 739 int speed, int duplex, 740 bool tx_pause, bool rx_pause) 741 { 742 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 743 struct ethtool_eee *p = &priv->dev->ports[port].eee; 744 u32 reg, offset; 745 746 bcm_sf2_sw_mac_link_set(ds, port, interface, true); 747 748 if (port != core_readl(priv, CORE_IMP0_PRT_ID)) { 749 if (priv->type == BCM7445_DEVICE_ID) 750 offset = CORE_STS_OVERRIDE_GMIIP_PORT(port); 751 else 752 offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port); 753 754 if (interface == PHY_INTERFACE_MODE_RGMII || 755 interface == PHY_INTERFACE_MODE_RGMII_TXID || 756 interface == PHY_INTERFACE_MODE_MII || 757 interface == PHY_INTERFACE_MODE_REVMII) { 758 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); 759 reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN); 760 761 if (tx_pause) 762 reg |= TX_PAUSE_EN; 763 if (rx_pause) 764 reg |= RX_PAUSE_EN; 765 766 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); 767 } 768 769 reg = SW_OVERRIDE | LINK_STS; 770 switch (speed) { 771 case SPEED_1000: 772 reg |= SPDSTS_1000 << SPEED_SHIFT; 773 break; 774 case SPEED_100: 775 reg |= SPDSTS_100 << SPEED_SHIFT; 776 break; 777 } 778 779 if (duplex == DUPLEX_FULL) 780 reg |= DUPLX_MODE; 781 782 core_writel(priv, reg, offset); 783 } 784 785 if (mode == MLO_AN_PHY && phydev) 786 p->eee_enabled = b53_eee_init(ds, port, phydev); 787 } 788 789 static void bcm_sf2_sw_fixed_state(struct dsa_switch *ds, int port, 790 struct phylink_link_state *status) 791 { 792 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 793 794 status->link = false; 795 796 /* MoCA port is special as we do not get link status from CORE_LNKSTS, 797 * which means that we need to force the link at the port override 798 * level to get the data to flow. We do use what the interrupt handler 799 * did determine before. 800 * 801 * For the other ports, we just force the link status, since this is 802 * a fixed PHY device. 803 */ 804 if (port == priv->moca_port) { 805 status->link = priv->port_sts[port].link; 806 /* For MoCA interfaces, also force a link down notification 807 * since some version of the user-space daemon (mocad) use 808 * cmd->autoneg to force the link, which messes up the PHY 809 * state machine and make it go in PHY_FORCING state instead. 810 */ 811 if (!status->link) 812 netif_carrier_off(dsa_to_port(ds, port)->slave); 813 status->duplex = DUPLEX_FULL; 814 } else { 815 status->link = true; 816 } 817 } 818 819 static void bcm_sf2_enable_acb(struct dsa_switch *ds) 820 { 821 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 822 u32 reg; 823 824 /* Enable ACB globally */ 825 reg = acb_readl(priv, ACB_CONTROL); 826 reg |= (ACB_FLUSH_MASK << ACB_FLUSH_SHIFT); 827 acb_writel(priv, reg, ACB_CONTROL); 828 reg &= ~(ACB_FLUSH_MASK << ACB_FLUSH_SHIFT); 829 reg |= ACB_EN | ACB_ALGORITHM; 830 acb_writel(priv, reg, ACB_CONTROL); 831 } 832 833 static int bcm_sf2_sw_suspend(struct dsa_switch *ds) 834 { 835 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 836 unsigned int port; 837 838 bcm_sf2_intr_disable(priv); 839 840 /* Disable all ports physically present including the IMP 841 * port, the other ones have already been disabled during 842 * bcm_sf2_sw_setup 843 */ 844 for (port = 0; port < ds->num_ports; port++) { 845 if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port)) 846 bcm_sf2_port_disable(ds, port); 847 } 848 849 if (!priv->wol_ports_mask) 850 clk_disable_unprepare(priv->clk); 851 852 return 0; 853 } 854 855 static int bcm_sf2_sw_resume(struct dsa_switch *ds) 856 { 857 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 858 int ret; 859 860 if (!priv->wol_ports_mask) 861 clk_prepare_enable(priv->clk); 862 863 ret = bcm_sf2_sw_rst(priv); 864 if (ret) { 865 pr_err("%s: failed to software reset switch\n", __func__); 866 return ret; 867 } 868 869 ret = bcm_sf2_cfp_resume(ds); 870 if (ret) 871 return ret; 872 873 if (priv->hw_params.num_gphy == 1) 874 bcm_sf2_gphy_enable_set(ds, true); 875 876 ds->ops->setup(ds); 877 878 return 0; 879 } 880 881 static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port, 882 struct ethtool_wolinfo *wol) 883 { 884 struct net_device *p = dsa_to_port(ds, port)->cpu_dp->master; 885 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 886 struct ethtool_wolinfo pwol = { }; 887 888 /* Get the parent device WoL settings */ 889 if (p->ethtool_ops->get_wol) 890 p->ethtool_ops->get_wol(p, &pwol); 891 892 /* Advertise the parent device supported settings */ 893 wol->supported = pwol.supported; 894 memset(&wol->sopass, 0, sizeof(wol->sopass)); 895 896 if (pwol.wolopts & WAKE_MAGICSECURE) 897 memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass)); 898 899 if (priv->wol_ports_mask & (1 << port)) 900 wol->wolopts = pwol.wolopts; 901 else 902 wol->wolopts = 0; 903 } 904 905 static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port, 906 struct ethtool_wolinfo *wol) 907 { 908 struct net_device *p = dsa_to_port(ds, port)->cpu_dp->master; 909 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 910 s8 cpu_port = dsa_to_port(ds, port)->cpu_dp->index; 911 struct ethtool_wolinfo pwol = { }; 912 913 if (p->ethtool_ops->get_wol) 914 p->ethtool_ops->get_wol(p, &pwol); 915 if (wol->wolopts & ~pwol.supported) 916 return -EINVAL; 917 918 if (wol->wolopts) 919 priv->wol_ports_mask |= (1 << port); 920 else 921 priv->wol_ports_mask &= ~(1 << port); 922 923 /* If we have at least one port enabled, make sure the CPU port 924 * is also enabled. If the CPU port is the last one enabled, we disable 925 * it since this configuration does not make sense. 926 */ 927 if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port)) 928 priv->wol_ports_mask |= (1 << cpu_port); 929 else 930 priv->wol_ports_mask &= ~(1 << cpu_port); 931 932 return p->ethtool_ops->set_wol(p, wol); 933 } 934 935 static int bcm_sf2_sw_setup(struct dsa_switch *ds) 936 { 937 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); 938 unsigned int port; 939 940 /* Enable all valid ports and disable those unused */ 941 for (port = 0; port < priv->hw_params.num_ports; port++) { 942 /* IMP port receives special treatment */ 943 if (dsa_is_user_port(ds, port)) 944 bcm_sf2_port_setup(ds, port, NULL); 945 else if (dsa_is_cpu_port(ds, port)) 946 bcm_sf2_imp_setup(ds, port); 947 else 948 bcm_sf2_port_disable(ds, port); 949 } 950 951 b53_configure_vlan(ds); 952 bcm_sf2_enable_acb(ds); 953 954 return b53_setup_devlink_resources(ds); 955 } 956 957 static void bcm_sf2_sw_teardown(struct dsa_switch *ds) 958 { 959 dsa_devlink_resources_unregister(ds); 960 } 961 962 /* The SWITCH_CORE register space is managed by b53 but operates on a page + 963 * register basis so we need to translate that into an address that the 964 * bus-glue understands. 965 */ 966 #define SF2_PAGE_REG_MKADDR(page, reg) ((page) << 10 | (reg) << 2) 967 968 static int bcm_sf2_core_read8(struct b53_device *dev, u8 page, u8 reg, 969 u8 *val) 970 { 971 struct bcm_sf2_priv *priv = dev->priv; 972 973 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); 974 975 return 0; 976 } 977 978 static int bcm_sf2_core_read16(struct b53_device *dev, u8 page, u8 reg, 979 u16 *val) 980 { 981 struct bcm_sf2_priv *priv = dev->priv; 982 983 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); 984 985 return 0; 986 } 987 988 static int bcm_sf2_core_read32(struct b53_device *dev, u8 page, u8 reg, 989 u32 *val) 990 { 991 struct bcm_sf2_priv *priv = dev->priv; 992 993 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); 994 995 return 0; 996 } 997 998 static int bcm_sf2_core_read64(struct b53_device *dev, u8 page, u8 reg, 999 u64 *val) 1000 { 1001 struct bcm_sf2_priv *priv = dev->priv; 1002 1003 *val = core_readq(priv, SF2_PAGE_REG_MKADDR(page, reg)); 1004 1005 return 0; 1006 } 1007 1008 static int bcm_sf2_core_write8(struct b53_device *dev, u8 page, u8 reg, 1009 u8 value) 1010 { 1011 struct bcm_sf2_priv *priv = dev->priv; 1012 1013 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1014 1015 return 0; 1016 } 1017 1018 static int bcm_sf2_core_write16(struct b53_device *dev, u8 page, u8 reg, 1019 u16 value) 1020 { 1021 struct bcm_sf2_priv *priv = dev->priv; 1022 1023 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1024 1025 return 0; 1026 } 1027 1028 static int bcm_sf2_core_write32(struct b53_device *dev, u8 page, u8 reg, 1029 u32 value) 1030 { 1031 struct bcm_sf2_priv *priv = dev->priv; 1032 1033 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1034 1035 return 0; 1036 } 1037 1038 static int bcm_sf2_core_write64(struct b53_device *dev, u8 page, u8 reg, 1039 u64 value) 1040 { 1041 struct bcm_sf2_priv *priv = dev->priv; 1042 1043 core_writeq(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); 1044 1045 return 0; 1046 } 1047 1048 static const struct b53_io_ops bcm_sf2_io_ops = { 1049 .read8 = bcm_sf2_core_read8, 1050 .read16 = bcm_sf2_core_read16, 1051 .read32 = bcm_sf2_core_read32, 1052 .read48 = bcm_sf2_core_read64, 1053 .read64 = bcm_sf2_core_read64, 1054 .write8 = bcm_sf2_core_write8, 1055 .write16 = bcm_sf2_core_write16, 1056 .write32 = bcm_sf2_core_write32, 1057 .write48 = bcm_sf2_core_write64, 1058 .write64 = bcm_sf2_core_write64, 1059 }; 1060 1061 static void bcm_sf2_sw_get_strings(struct dsa_switch *ds, int port, 1062 u32 stringset, uint8_t *data) 1063 { 1064 int cnt = b53_get_sset_count(ds, port, stringset); 1065 1066 b53_get_strings(ds, port, stringset, data); 1067 bcm_sf2_cfp_get_strings(ds, port, stringset, 1068 data + cnt * ETH_GSTRING_LEN); 1069 } 1070 1071 static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds, int port, 1072 uint64_t *data) 1073 { 1074 int cnt = b53_get_sset_count(ds, port, ETH_SS_STATS); 1075 1076 b53_get_ethtool_stats(ds, port, data); 1077 bcm_sf2_cfp_get_ethtool_stats(ds, port, data + cnt); 1078 } 1079 1080 static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds, int port, 1081 int sset) 1082 { 1083 int cnt = b53_get_sset_count(ds, port, sset); 1084 1085 if (cnt < 0) 1086 return cnt; 1087 1088 cnt += bcm_sf2_cfp_get_sset_count(ds, port, sset); 1089 1090 return cnt; 1091 } 1092 1093 static const struct dsa_switch_ops bcm_sf2_ops = { 1094 .get_tag_protocol = b53_get_tag_protocol, 1095 .setup = bcm_sf2_sw_setup, 1096 .teardown = bcm_sf2_sw_teardown, 1097 .get_strings = bcm_sf2_sw_get_strings, 1098 .get_ethtool_stats = bcm_sf2_sw_get_ethtool_stats, 1099 .get_sset_count = bcm_sf2_sw_get_sset_count, 1100 .get_ethtool_phy_stats = b53_get_ethtool_phy_stats, 1101 .get_phy_flags = bcm_sf2_sw_get_phy_flags, 1102 .phylink_validate = bcm_sf2_sw_validate, 1103 .phylink_mac_config = bcm_sf2_sw_mac_config, 1104 .phylink_mac_link_down = bcm_sf2_sw_mac_link_down, 1105 .phylink_mac_link_up = bcm_sf2_sw_mac_link_up, 1106 .phylink_fixed_state = bcm_sf2_sw_fixed_state, 1107 .suspend = bcm_sf2_sw_suspend, 1108 .resume = bcm_sf2_sw_resume, 1109 .get_wol = bcm_sf2_sw_get_wol, 1110 .set_wol = bcm_sf2_sw_set_wol, 1111 .port_enable = bcm_sf2_port_setup, 1112 .port_disable = bcm_sf2_port_disable, 1113 .get_mac_eee = b53_get_mac_eee, 1114 .set_mac_eee = b53_set_mac_eee, 1115 .port_bridge_join = b53_br_join, 1116 .port_bridge_leave = b53_br_leave, 1117 .port_stp_state_set = b53_br_set_stp_state, 1118 .port_fast_age = b53_br_fast_age, 1119 .port_vlan_filtering = b53_vlan_filtering, 1120 .port_vlan_prepare = b53_vlan_prepare, 1121 .port_vlan_add = b53_vlan_add, 1122 .port_vlan_del = b53_vlan_del, 1123 .port_fdb_dump = b53_fdb_dump, 1124 .port_fdb_add = b53_fdb_add, 1125 .port_fdb_del = b53_fdb_del, 1126 .get_rxnfc = bcm_sf2_get_rxnfc, 1127 .set_rxnfc = bcm_sf2_set_rxnfc, 1128 .port_mirror_add = b53_mirror_add, 1129 .port_mirror_del = b53_mirror_del, 1130 .port_mdb_prepare = b53_mdb_prepare, 1131 .port_mdb_add = b53_mdb_add, 1132 .port_mdb_del = b53_mdb_del, 1133 }; 1134 1135 struct bcm_sf2_of_data { 1136 u32 type; 1137 const u16 *reg_offsets; 1138 unsigned int core_reg_align; 1139 unsigned int num_cfp_rules; 1140 }; 1141 1142 /* Register offsets for the SWITCH_REG_* block */ 1143 static const u16 bcm_sf2_7445_reg_offsets[] = { 1144 [REG_SWITCH_CNTRL] = 0x00, 1145 [REG_SWITCH_STATUS] = 0x04, 1146 [REG_DIR_DATA_WRITE] = 0x08, 1147 [REG_DIR_DATA_READ] = 0x0C, 1148 [REG_SWITCH_REVISION] = 0x18, 1149 [REG_PHY_REVISION] = 0x1C, 1150 [REG_SPHY_CNTRL] = 0x2C, 1151 [REG_RGMII_0_CNTRL] = 0x34, 1152 [REG_RGMII_1_CNTRL] = 0x40, 1153 [REG_RGMII_2_CNTRL] = 0x4c, 1154 [REG_LED_0_CNTRL] = 0x90, 1155 [REG_LED_1_CNTRL] = 0x94, 1156 [REG_LED_2_CNTRL] = 0x98, 1157 }; 1158 1159 static const struct bcm_sf2_of_data bcm_sf2_7445_data = { 1160 .type = BCM7445_DEVICE_ID, 1161 .core_reg_align = 0, 1162 .reg_offsets = bcm_sf2_7445_reg_offsets, 1163 .num_cfp_rules = 256, 1164 }; 1165 1166 static const u16 bcm_sf2_7278_reg_offsets[] = { 1167 [REG_SWITCH_CNTRL] = 0x00, 1168 [REG_SWITCH_STATUS] = 0x04, 1169 [REG_DIR_DATA_WRITE] = 0x08, 1170 [REG_DIR_DATA_READ] = 0x0c, 1171 [REG_SWITCH_REVISION] = 0x10, 1172 [REG_PHY_REVISION] = 0x14, 1173 [REG_SPHY_CNTRL] = 0x24, 1174 [REG_RGMII_0_CNTRL] = 0xe0, 1175 [REG_RGMII_1_CNTRL] = 0xec, 1176 [REG_RGMII_2_CNTRL] = 0xf8, 1177 [REG_LED_0_CNTRL] = 0x40, 1178 [REG_LED_1_CNTRL] = 0x4c, 1179 [REG_LED_2_CNTRL] = 0x58, 1180 }; 1181 1182 static const struct bcm_sf2_of_data bcm_sf2_7278_data = { 1183 .type = BCM7278_DEVICE_ID, 1184 .core_reg_align = 1, 1185 .reg_offsets = bcm_sf2_7278_reg_offsets, 1186 .num_cfp_rules = 128, 1187 }; 1188 1189 static const struct of_device_id bcm_sf2_of_match[] = { 1190 { .compatible = "brcm,bcm7445-switch-v4.0", 1191 .data = &bcm_sf2_7445_data 1192 }, 1193 { .compatible = "brcm,bcm7278-switch-v4.0", 1194 .data = &bcm_sf2_7278_data 1195 }, 1196 { .compatible = "brcm,bcm7278-switch-v4.8", 1197 .data = &bcm_sf2_7278_data 1198 }, 1199 { /* sentinel */ }, 1200 }; 1201 MODULE_DEVICE_TABLE(of, bcm_sf2_of_match); 1202 1203 static int bcm_sf2_sw_probe(struct platform_device *pdev) 1204 { 1205 const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME; 1206 struct device_node *dn = pdev->dev.of_node; 1207 const struct of_device_id *of_id = NULL; 1208 const struct bcm_sf2_of_data *data; 1209 struct b53_platform_data *pdata; 1210 struct dsa_switch_ops *ops; 1211 struct device_node *ports; 1212 struct bcm_sf2_priv *priv; 1213 struct b53_device *dev; 1214 struct dsa_switch *ds; 1215 void __iomem **base; 1216 unsigned int i; 1217 u32 reg, rev; 1218 int ret; 1219 1220 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1221 if (!priv) 1222 return -ENOMEM; 1223 1224 ops = devm_kzalloc(&pdev->dev, sizeof(*ops), GFP_KERNEL); 1225 if (!ops) 1226 return -ENOMEM; 1227 1228 dev = b53_switch_alloc(&pdev->dev, &bcm_sf2_io_ops, priv); 1229 if (!dev) 1230 return -ENOMEM; 1231 1232 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 1233 if (!pdata) 1234 return -ENOMEM; 1235 1236 of_id = of_match_node(bcm_sf2_of_match, dn); 1237 if (!of_id || !of_id->data) 1238 return -EINVAL; 1239 1240 data = of_id->data; 1241 1242 /* Set SWITCH_REG register offsets and SWITCH_CORE align factor */ 1243 priv->type = data->type; 1244 priv->reg_offsets = data->reg_offsets; 1245 priv->core_reg_align = data->core_reg_align; 1246 priv->num_cfp_rules = data->num_cfp_rules; 1247 1248 priv->rcdev = devm_reset_control_get_optional_exclusive(&pdev->dev, 1249 "switch"); 1250 if (PTR_ERR(priv->rcdev) == -EPROBE_DEFER) 1251 return PTR_ERR(priv->rcdev); 1252 1253 /* Auto-detection using standard registers will not work, so 1254 * provide an indication of what kind of device we are for 1255 * b53_common to work with 1256 */ 1257 pdata->chip_id = priv->type; 1258 dev->pdata = pdata; 1259 1260 priv->dev = dev; 1261 ds = dev->ds; 1262 ds->ops = &bcm_sf2_ops; 1263 1264 /* Advertise the 8 egress queues */ 1265 ds->num_tx_queues = SF2_NUM_EGRESS_QUEUES; 1266 1267 dev_set_drvdata(&pdev->dev, priv); 1268 1269 spin_lock_init(&priv->indir_lock); 1270 mutex_init(&priv->cfp.lock); 1271 INIT_LIST_HEAD(&priv->cfp.rules_list); 1272 1273 /* CFP rule #0 cannot be used for specific classifications, flag it as 1274 * permanently used 1275 */ 1276 set_bit(0, priv->cfp.used); 1277 set_bit(0, priv->cfp.unique); 1278 1279 /* Balance of_node_put() done by of_find_node_by_name() */ 1280 of_node_get(dn); 1281 ports = of_find_node_by_name(dn, "ports"); 1282 if (ports) { 1283 bcm_sf2_identify_ports(priv, ports); 1284 of_node_put(ports); 1285 } 1286 1287 priv->irq0 = irq_of_parse_and_map(dn, 0); 1288 priv->irq1 = irq_of_parse_and_map(dn, 1); 1289 1290 base = &priv->core; 1291 for (i = 0; i < BCM_SF2_REGS_NUM; i++) { 1292 *base = devm_platform_ioremap_resource(pdev, i); 1293 if (IS_ERR(*base)) { 1294 pr_err("unable to find register: %s\n", reg_names[i]); 1295 return PTR_ERR(*base); 1296 } 1297 base++; 1298 } 1299 1300 priv->clk = devm_clk_get_optional(&pdev->dev, "sw_switch"); 1301 if (IS_ERR(priv->clk)) 1302 return PTR_ERR(priv->clk); 1303 1304 clk_prepare_enable(priv->clk); 1305 1306 priv->clk_mdiv = devm_clk_get_optional(&pdev->dev, "sw_switch_mdiv"); 1307 if (IS_ERR(priv->clk_mdiv)) { 1308 ret = PTR_ERR(priv->clk_mdiv); 1309 goto out_clk; 1310 } 1311 1312 clk_prepare_enable(priv->clk_mdiv); 1313 1314 ret = bcm_sf2_sw_rst(priv); 1315 if (ret) { 1316 pr_err("unable to software reset switch: %d\n", ret); 1317 goto out_clk_mdiv; 1318 } 1319 1320 bcm_sf2_gphy_enable_set(priv->dev->ds, true); 1321 1322 ret = bcm_sf2_mdio_register(ds); 1323 if (ret) { 1324 pr_err("failed to register MDIO bus\n"); 1325 goto out_clk_mdiv; 1326 } 1327 1328 bcm_sf2_gphy_enable_set(priv->dev->ds, false); 1329 1330 ret = bcm_sf2_cfp_rst(priv); 1331 if (ret) { 1332 pr_err("failed to reset CFP\n"); 1333 goto out_mdio; 1334 } 1335 1336 /* Disable all interrupts and request them */ 1337 bcm_sf2_intr_disable(priv); 1338 1339 ret = devm_request_irq(&pdev->dev, priv->irq0, bcm_sf2_switch_0_isr, 0, 1340 "switch_0", ds); 1341 if (ret < 0) { 1342 pr_err("failed to request switch_0 IRQ\n"); 1343 goto out_mdio; 1344 } 1345 1346 ret = devm_request_irq(&pdev->dev, priv->irq1, bcm_sf2_switch_1_isr, 0, 1347 "switch_1", ds); 1348 if (ret < 0) { 1349 pr_err("failed to request switch_1 IRQ\n"); 1350 goto out_mdio; 1351 } 1352 1353 /* Reset the MIB counters */ 1354 reg = core_readl(priv, CORE_GMNCFGCFG); 1355 reg |= RST_MIB_CNT; 1356 core_writel(priv, reg, CORE_GMNCFGCFG); 1357 reg &= ~RST_MIB_CNT; 1358 core_writel(priv, reg, CORE_GMNCFGCFG); 1359 1360 /* Get the maximum number of ports for this switch */ 1361 priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1; 1362 if (priv->hw_params.num_ports > DSA_MAX_PORTS) 1363 priv->hw_params.num_ports = DSA_MAX_PORTS; 1364 1365 /* Assume a single GPHY setup if we can't read that property */ 1366 if (of_property_read_u32(dn, "brcm,num-gphy", 1367 &priv->hw_params.num_gphy)) 1368 priv->hw_params.num_gphy = 1; 1369 1370 rev = reg_readl(priv, REG_SWITCH_REVISION); 1371 priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) & 1372 SWITCH_TOP_REV_MASK; 1373 priv->hw_params.core_rev = (rev & SF2_REV_MASK); 1374 1375 rev = reg_readl(priv, REG_PHY_REVISION); 1376 priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK; 1377 1378 ret = b53_switch_register(dev); 1379 if (ret) 1380 goto out_mdio; 1381 1382 dev_info(&pdev->dev, 1383 "Starfighter 2 top: %x.%02x, core: %x.%02x, IRQs: %d, %d\n", 1384 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff, 1385 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff, 1386 priv->irq0, priv->irq1); 1387 1388 return 0; 1389 1390 out_mdio: 1391 bcm_sf2_mdio_unregister(priv); 1392 out_clk_mdiv: 1393 clk_disable_unprepare(priv->clk_mdiv); 1394 out_clk: 1395 clk_disable_unprepare(priv->clk); 1396 return ret; 1397 } 1398 1399 static int bcm_sf2_sw_remove(struct platform_device *pdev) 1400 { 1401 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); 1402 1403 priv->wol_ports_mask = 0; 1404 /* Disable interrupts */ 1405 bcm_sf2_intr_disable(priv); 1406 dsa_unregister_switch(priv->dev->ds); 1407 bcm_sf2_cfp_exit(priv->dev->ds); 1408 bcm_sf2_mdio_unregister(priv); 1409 clk_disable_unprepare(priv->clk_mdiv); 1410 clk_disable_unprepare(priv->clk); 1411 if (priv->type == BCM7278_DEVICE_ID && !IS_ERR(priv->rcdev)) 1412 reset_control_assert(priv->rcdev); 1413 1414 return 0; 1415 } 1416 1417 static void bcm_sf2_sw_shutdown(struct platform_device *pdev) 1418 { 1419 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); 1420 1421 /* For a kernel about to be kexec'd we want to keep the GPHY on for a 1422 * successful MDIO bus scan to occur. If we did turn off the GPHY 1423 * before (e.g: port_disable), this will also power it back on. 1424 * 1425 * Do not rely on kexec_in_progress, just power the PHY on. 1426 */ 1427 if (priv->hw_params.num_gphy == 1) 1428 bcm_sf2_gphy_enable_set(priv->dev->ds, true); 1429 } 1430 1431 #ifdef CONFIG_PM_SLEEP 1432 static int bcm_sf2_suspend(struct device *dev) 1433 { 1434 struct bcm_sf2_priv *priv = dev_get_drvdata(dev); 1435 1436 return dsa_switch_suspend(priv->dev->ds); 1437 } 1438 1439 static int bcm_sf2_resume(struct device *dev) 1440 { 1441 struct bcm_sf2_priv *priv = dev_get_drvdata(dev); 1442 1443 return dsa_switch_resume(priv->dev->ds); 1444 } 1445 #endif /* CONFIG_PM_SLEEP */ 1446 1447 static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops, 1448 bcm_sf2_suspend, bcm_sf2_resume); 1449 1450 1451 static struct platform_driver bcm_sf2_driver = { 1452 .probe = bcm_sf2_sw_probe, 1453 .remove = bcm_sf2_sw_remove, 1454 .shutdown = bcm_sf2_sw_shutdown, 1455 .driver = { 1456 .name = "brcm-sf2", 1457 .of_match_table = bcm_sf2_of_match, 1458 .pm = &bcm_sf2_pm_ops, 1459 }, 1460 }; 1461 module_platform_driver(bcm_sf2_driver); 1462 1463 MODULE_AUTHOR("Broadcom Corporation"); 1464 MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip"); 1465 MODULE_LICENSE("GPL"); 1466 MODULE_ALIAS("platform:brcm-sf2"); 1467