1 // SPDX-License-Identifier: GPL-2.0-only 2 /******************************************************************************* 3 This contains the functions to handle the platform driver. 4 5 Copyright (C) 2007-2011 STMicroelectronics Ltd 6 7 8 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> 9 *******************************************************************************/ 10 11 #include <linux/device.h> 12 #include <linux/platform_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/module.h> 15 #include <linux/io.h> 16 #include <linux/of.h> 17 #include <linux/of_net.h> 18 #include <linux/of_mdio.h> 19 20 #include "stmmac.h" 21 #include "stmmac_platform.h" 22 23 #ifdef CONFIG_OF 24 25 /** 26 * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins 27 * @dev: struct device of the platform device 28 * @mcast_bins: Multicast filtering bins 29 * Description: 30 * this function validates the number of Multicast filtering bins specified 31 * by the configuration through the device tree. The Synopsys GMAC supports 32 * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC 33 * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds 34 * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is 35 * invalid and will cause the filtering algorithm to use Multicast 36 * promiscuous mode. 37 */ 38 static int dwmac1000_validate_mcast_bins(struct device *dev, int mcast_bins) 39 { 40 int x = mcast_bins; 41 42 switch (x) { 43 case HASH_TABLE_SIZE: 44 case 128: 45 case 256: 46 break; 47 default: 48 x = 0; 49 dev_info(dev, "Hash table entries set to unexpected value %d\n", 50 mcast_bins); 51 break; 52 } 53 return x; 54 } 55 56 /** 57 * dwmac1000_validate_ucast_entries - validate the Unicast address entries 58 * @dev: struct device of the platform device 59 * @ucast_entries: number of Unicast address entries 60 * Description: 61 * This function validates the number of Unicast address entries supported 62 * by a particular Synopsys 10/100/1000 controller. The Synopsys controller 63 * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter 64 * logic. This function validates a valid, supported configuration is 65 * selected, and defaults to 1 Unicast address if an unsupported 66 * configuration is selected. 67 */ 68 static int dwmac1000_validate_ucast_entries(struct device *dev, 69 int ucast_entries) 70 { 71 int x = ucast_entries; 72 73 switch (x) { 74 case 1 ... 32: 75 case 64: 76 case 128: 77 break; 78 default: 79 x = 1; 80 dev_info(dev, "Unicast table entries set to unexpected value %d\n", 81 ucast_entries); 82 break; 83 } 84 return x; 85 } 86 87 /** 88 * stmmac_axi_setup - parse DT parameters for programming the AXI register 89 * @pdev: platform device 90 * Description: 91 * if required, from device-tree the AXI internal register can be tuned 92 * by using platform parameters. 93 */ 94 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev) 95 { 96 struct device_node *np; 97 struct stmmac_axi *axi; 98 99 np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0); 100 if (!np) 101 return NULL; 102 103 axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL); 104 if (!axi) { 105 of_node_put(np); 106 return ERR_PTR(-ENOMEM); 107 } 108 109 axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en"); 110 axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm"); 111 axi->axi_kbbe = of_property_read_bool(np, "snps,kbbe"); 112 axi->axi_fb = of_property_read_bool(np, "snps,fb"); 113 axi->axi_mb = of_property_read_bool(np, "snps,mb"); 114 axi->axi_rb = of_property_read_bool(np, "snps,rb"); 115 116 if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt)) 117 axi->axi_wr_osr_lmt = 1; 118 if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt)) 119 axi->axi_rd_osr_lmt = 1; 120 of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN); 121 of_node_put(np); 122 123 return axi; 124 } 125 126 /** 127 * stmmac_mtl_setup - parse DT parameters for multiple queues configuration 128 * @pdev: platform device 129 * @plat: enet data 130 */ 131 static int stmmac_mtl_setup(struct platform_device *pdev, 132 struct plat_stmmacenet_data *plat) 133 { 134 struct device_node *q_node; 135 struct device_node *rx_node; 136 struct device_node *tx_node; 137 u8 queue = 0; 138 int ret = 0; 139 140 /* For backwards-compatibility with device trees that don't have any 141 * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back 142 * to one RX and TX queues each. 143 */ 144 plat->rx_queues_to_use = 1; 145 plat->tx_queues_to_use = 1; 146 147 /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need 148 * to always set this, otherwise Queue will be classified as AVB 149 * (because MTL_QUEUE_AVB = 0). 150 */ 151 plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB; 152 plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB; 153 154 rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0); 155 if (!rx_node) 156 return ret; 157 158 tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0); 159 if (!tx_node) { 160 of_node_put(rx_node); 161 return ret; 162 } 163 164 /* Processing RX queues common config */ 165 if (of_property_read_u32(rx_node, "snps,rx-queues-to-use", 166 &plat->rx_queues_to_use)) 167 plat->rx_queues_to_use = 1; 168 169 if (of_property_read_bool(rx_node, "snps,rx-sched-sp")) 170 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP; 171 else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp")) 172 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP; 173 else 174 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP; 175 176 /* Processing individual RX queue config */ 177 for_each_child_of_node(rx_node, q_node) { 178 if (queue >= plat->rx_queues_to_use) 179 break; 180 181 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) 182 plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; 183 else if (of_property_read_bool(q_node, "snps,avb-algorithm")) 184 plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB; 185 else 186 plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; 187 188 if (of_property_read_u32(q_node, "snps,map-to-dma-channel", 189 &plat->rx_queues_cfg[queue].chan)) 190 plat->rx_queues_cfg[queue].chan = queue; 191 /* TODO: Dynamic mapping to be included in the future */ 192 193 if (of_property_read_u32(q_node, "snps,priority", 194 &plat->rx_queues_cfg[queue].prio)) { 195 plat->rx_queues_cfg[queue].prio = 0; 196 plat->rx_queues_cfg[queue].use_prio = false; 197 } else { 198 plat->rx_queues_cfg[queue].use_prio = true; 199 } 200 201 /* RX queue specific packet type routing */ 202 if (of_property_read_bool(q_node, "snps,route-avcp")) 203 plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ; 204 else if (of_property_read_bool(q_node, "snps,route-ptp")) 205 plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ; 206 else if (of_property_read_bool(q_node, "snps,route-dcbcp")) 207 plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ; 208 else if (of_property_read_bool(q_node, "snps,route-up")) 209 plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ; 210 else if (of_property_read_bool(q_node, "snps,route-multi-broad")) 211 plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ; 212 else 213 plat->rx_queues_cfg[queue].pkt_route = 0x0; 214 215 queue++; 216 } 217 if (queue != plat->rx_queues_to_use) { 218 ret = -EINVAL; 219 dev_err(&pdev->dev, "Not all RX queues were configured\n"); 220 goto out; 221 } 222 223 /* Processing TX queues common config */ 224 if (of_property_read_u32(tx_node, "snps,tx-queues-to-use", 225 &plat->tx_queues_to_use)) 226 plat->tx_queues_to_use = 1; 227 228 if (of_property_read_bool(tx_node, "snps,tx-sched-wrr")) 229 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR; 230 else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq")) 231 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ; 232 else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr")) 233 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR; 234 else 235 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP; 236 237 queue = 0; 238 239 /* Processing individual TX queue config */ 240 for_each_child_of_node(tx_node, q_node) { 241 if (queue >= plat->tx_queues_to_use) 242 break; 243 244 if (of_property_read_u32(q_node, "snps,weight", 245 &plat->tx_queues_cfg[queue].weight)) 246 plat->tx_queues_cfg[queue].weight = 0x10 + queue; 247 248 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) { 249 plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; 250 } else if (of_property_read_bool(q_node, 251 "snps,avb-algorithm")) { 252 plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB; 253 254 /* Credit Base Shaper parameters used by AVB */ 255 if (of_property_read_u32(q_node, "snps,send_slope", 256 &plat->tx_queues_cfg[queue].send_slope)) 257 plat->tx_queues_cfg[queue].send_slope = 0x0; 258 if (of_property_read_u32(q_node, "snps,idle_slope", 259 &plat->tx_queues_cfg[queue].idle_slope)) 260 plat->tx_queues_cfg[queue].idle_slope = 0x0; 261 if (of_property_read_u32(q_node, "snps,high_credit", 262 &plat->tx_queues_cfg[queue].high_credit)) 263 plat->tx_queues_cfg[queue].high_credit = 0x0; 264 if (of_property_read_u32(q_node, "snps,low_credit", 265 &plat->tx_queues_cfg[queue].low_credit)) 266 plat->tx_queues_cfg[queue].low_credit = 0x0; 267 } else { 268 plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; 269 } 270 271 if (of_property_read_u32(q_node, "snps,priority", 272 &plat->tx_queues_cfg[queue].prio)) { 273 plat->tx_queues_cfg[queue].prio = 0; 274 plat->tx_queues_cfg[queue].use_prio = false; 275 } else { 276 plat->tx_queues_cfg[queue].use_prio = true; 277 } 278 279 plat->tx_queues_cfg[queue].coe_unsupported = 280 of_property_read_bool(q_node, "snps,coe-unsupported"); 281 282 queue++; 283 } 284 if (queue != plat->tx_queues_to_use) { 285 ret = -EINVAL; 286 dev_err(&pdev->dev, "Not all TX queues were configured\n"); 287 goto out; 288 } 289 290 out: 291 of_node_put(rx_node); 292 of_node_put(tx_node); 293 of_node_put(q_node); 294 295 return ret; 296 } 297 298 /** 299 * stmmac_of_get_mdio() - Gets the MDIO bus from the devicetree. 300 * @np: devicetree node 301 * 302 * The MDIO bus will be searched for in the following ways: 303 * 1. The compatible is "snps,dwc-qos-ethernet-4.10" && a "mdio" named 304 * child node exists 305 * 2. A child node with the "snps,dwmac-mdio" compatible is present 306 * 307 * Return: The MDIO node if present otherwise NULL 308 */ 309 static struct device_node *stmmac_of_get_mdio(struct device_node *np) 310 { 311 static const struct of_device_id need_mdio_ids[] = { 312 { .compatible = "snps,dwc-qos-ethernet-4.10" }, 313 {}, 314 }; 315 struct device_node *mdio_node = NULL; 316 317 if (of_match_node(need_mdio_ids, np)) { 318 mdio_node = of_get_child_by_name(np, "mdio"); 319 } else { 320 /** 321 * If snps,dwmac-mdio is passed from DT, always register 322 * the MDIO 323 */ 324 for_each_child_of_node(np, mdio_node) { 325 if (of_device_is_compatible(mdio_node, 326 "snps,dwmac-mdio")) 327 break; 328 } 329 } 330 331 return mdio_node; 332 } 333 334 /** 335 * stmmac_mdio_setup() - Populate platform related MDIO structures. 336 * @plat: driver data platform structure 337 * @np: devicetree node 338 * @dev: device pointer 339 * 340 * This searches for MDIO information from the devicetree. 341 * If an MDIO node is found, it's assigned to plat->mdio_node and 342 * plat->mdio_bus_data is allocated. 343 * If no connection can be determined, just plat->mdio_bus_data is allocated 344 * to indicate a bus should be created and scanned for a phy. 345 * If it's determined there's no MDIO bus needed, both are left NULL. 346 * 347 * This expects that plat->phy_node has already been searched for. 348 * 349 * Return: 0 on success, errno otherwise. 350 */ 351 static int stmmac_mdio_setup(struct plat_stmmacenet_data *plat, 352 struct device_node *np, struct device *dev) 353 { 354 bool legacy_mdio; 355 356 plat->mdio_node = stmmac_of_get_mdio(np); 357 if (plat->mdio_node) 358 dev_dbg(dev, "Found MDIO subnode\n"); 359 360 /* Legacy devicetrees allowed for no MDIO bus description and expect 361 * the bus to be scanned for devices. If there's no phy or fixed-link 362 * described assume this is the case since there must be something 363 * connected to the MAC. 364 */ 365 legacy_mdio = !of_phy_is_fixed_link(np) && !plat->phy_node; 366 if (legacy_mdio) 367 dev_info(dev, "Deprecated MDIO bus assumption used\n"); 368 369 if (plat->mdio_node || legacy_mdio) { 370 plat->mdio_bus_data = devm_kzalloc(dev, 371 sizeof(*plat->mdio_bus_data), 372 GFP_KERNEL); 373 if (!plat->mdio_bus_data) 374 return -ENOMEM; 375 376 plat->mdio_bus_data->needs_reset = true; 377 } 378 379 return 0; 380 } 381 382 /** 383 * stmmac_of_get_mac_mode - retrieves the interface of the MAC 384 * @np: - device-tree node 385 * Description: 386 * Similar to `of_get_phy_mode()`, this function will retrieve (from 387 * the device-tree) the interface mode on the MAC side. This assumes 388 * that there is mode converter in-between the MAC & PHY 389 * (e.g. GMII-to-RGMII). 390 */ 391 static int stmmac_of_get_mac_mode(struct device_node *np) 392 { 393 const char *pm; 394 int err, i; 395 396 err = of_property_read_string(np, "mac-mode", &pm); 397 if (err < 0) 398 return err; 399 400 for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) { 401 if (!strcasecmp(pm, phy_modes(i))) 402 return i; 403 } 404 405 return -ENODEV; 406 } 407 408 /* Compatible string array for all gmac4 devices */ 409 static const char * const stmmac_gmac4_compats[] = { 410 "snps,dwmac-4.00", 411 "snps,dwmac-4.10a", 412 "snps,dwmac-4.20a", 413 "snps,dwmac-5.10a", 414 "snps,dwmac-5.20", 415 "snps,dwmac-5.30a", 416 NULL 417 }; 418 419 /** 420 * stmmac_probe_config_dt - parse device-tree driver parameters 421 * @pdev: platform_device structure 422 * @mac: MAC address to use 423 * Description: 424 * this function is to read the driver parameters from device-tree and 425 * set some private fields that will be used by the main at runtime. 426 */ 427 static struct plat_stmmacenet_data * 428 stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) 429 { 430 struct device_node *np = pdev->dev.of_node; 431 struct plat_stmmacenet_data *plat; 432 struct stmmac_dma_cfg *dma_cfg; 433 static int bus_id = -ENODEV; 434 int phy_mode; 435 void *ret; 436 int rc; 437 438 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); 439 if (!plat) 440 return ERR_PTR(-ENOMEM); 441 442 rc = of_get_mac_address(np, mac); 443 if (rc) { 444 if (rc == -EPROBE_DEFER) 445 return ERR_PTR(rc); 446 447 eth_zero_addr(mac); 448 } 449 450 phy_mode = device_get_phy_mode(&pdev->dev); 451 if (phy_mode < 0) 452 return ERR_PTR(phy_mode); 453 454 plat->phy_interface = phy_mode; 455 rc = stmmac_of_get_mac_mode(np); 456 plat->mac_interface = rc < 0 ? plat->phy_interface : rc; 457 458 /* Some wrapper drivers still rely on phy_node. Let's save it while 459 * they are not converted to phylink. */ 460 plat->phy_node = of_parse_phandle(np, "phy-handle", 0); 461 462 /* PHYLINK automatically parses the phy-handle property */ 463 plat->port_node = of_fwnode_handle(np); 464 465 /* Get max speed of operation from device tree */ 466 of_property_read_u32(np, "max-speed", &plat->max_speed); 467 468 plat->bus_id = of_alias_get_id(np, "ethernet"); 469 if (plat->bus_id < 0) { 470 if (bus_id < 0) 471 bus_id = of_alias_get_highest_id("ethernet"); 472 /* No ethernet alias found, init at -1 so first bus_id is 0 */ 473 if (bus_id < 0) 474 bus_id = -1; 475 plat->bus_id = ++bus_id; 476 } 477 478 /* Default to phy auto-detection */ 479 plat->phy_addr = -1; 480 481 /* Default to get clk_csr from stmmac_clk_csr_set(), 482 * or get clk_csr from device tree. 483 */ 484 plat->clk_csr = -1; 485 if (of_property_read_u32(np, "snps,clk-csr", &plat->clk_csr)) 486 of_property_read_u32(np, "clk_csr", &plat->clk_csr); 487 488 /* "snps,phy-addr" is not a standard property. Mark it as deprecated 489 * and warn of its use. Remove this when phy node support is added. 490 */ 491 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0) 492 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n"); 493 494 rc = stmmac_mdio_setup(plat, np, &pdev->dev); 495 if (rc) { 496 ret = ERR_PTR(rc); 497 goto error_put_phy; 498 } 499 500 of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size); 501 502 of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size); 503 504 plat->force_sf_dma_mode = 505 of_property_read_bool(np, "snps,force_sf_dma_mode"); 506 507 if (of_property_read_bool(np, "snps,en-tx-lpi-clockgating")) { 508 dev_warn(&pdev->dev, 509 "OF property snps,en-tx-lpi-clockgating is deprecated, please convert driver to use STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP\n"); 510 plat->flags |= STMMAC_FLAG_EN_TX_LPI_CLOCKGATING; 511 } 512 513 /* Set the maxmtu to a default of JUMBO_LEN in case the 514 * parameter is not present in the device tree. 515 */ 516 plat->maxmtu = JUMBO_LEN; 517 518 /* Set default value for multicast hash bins */ 519 plat->multicast_filter_bins = HASH_TABLE_SIZE; 520 521 /* Set default value for unicast filter entries */ 522 plat->unicast_filter_entries = 1; 523 524 /* 525 * Currently only the properties needed on SPEAr600 526 * are provided. All other properties should be added 527 * once needed on other platforms. 528 */ 529 if (of_device_is_compatible(np, "st,spear600-gmac") || 530 of_device_is_compatible(np, "snps,dwmac-3.50a") || 531 of_device_is_compatible(np, "snps,dwmac-3.70a") || 532 of_device_is_compatible(np, "snps,dwmac-3.72a") || 533 of_device_is_compatible(np, "snps,dwmac")) { 534 /* Note that the max-frame-size parameter as defined in the 535 * ePAPR v1.1 spec is defined as max-frame-size, it's 536 * actually used as the IEEE definition of MAC Client 537 * data, or MTU. The ePAPR specification is confusing as 538 * the definition is max-frame-size, but usage examples 539 * are clearly MTUs 540 */ 541 of_property_read_u32(np, "max-frame-size", &plat->maxmtu); 542 of_property_read_u32(np, "snps,multicast-filter-bins", 543 &plat->multicast_filter_bins); 544 of_property_read_u32(np, "snps,perfect-filter-entries", 545 &plat->unicast_filter_entries); 546 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries( 547 &pdev->dev, plat->unicast_filter_entries); 548 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins( 549 &pdev->dev, plat->multicast_filter_bins); 550 plat->has_gmac = 1; 551 plat->pmt = 1; 552 } 553 554 if (of_device_is_compatible(np, "snps,dwmac-3.40a")) { 555 plat->has_gmac = 1; 556 plat->enh_desc = 1; 557 plat->tx_coe = 1; 558 plat->bugged_jumbo = 1; 559 plat->pmt = 1; 560 } 561 562 if (of_device_compatible_match(np, stmmac_gmac4_compats)) { 563 plat->has_gmac4 = 1; 564 plat->has_gmac = 0; 565 plat->pmt = 1; 566 if (of_property_read_bool(np, "snps,tso")) 567 plat->flags |= STMMAC_FLAG_TSO_EN; 568 } 569 570 if (of_device_is_compatible(np, "snps,dwmac-3.610") || 571 of_device_is_compatible(np, "snps,dwmac-3.710")) { 572 plat->enh_desc = 1; 573 plat->bugged_jumbo = 1; 574 plat->force_sf_dma_mode = 1; 575 } 576 577 if (of_device_is_compatible(np, "snps,dwxgmac")) { 578 plat->has_xgmac = 1; 579 plat->pmt = 1; 580 if (of_property_read_bool(np, "snps,tso")) 581 plat->flags |= STMMAC_FLAG_TSO_EN; 582 } 583 584 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), 585 GFP_KERNEL); 586 if (!dma_cfg) { 587 ret = ERR_PTR(-ENOMEM); 588 goto error_put_mdio; 589 } 590 plat->dma_cfg = dma_cfg; 591 592 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); 593 if (!dma_cfg->pbl) 594 dma_cfg->pbl = DEFAULT_DMA_PBL; 595 of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl); 596 of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl); 597 dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8"); 598 599 dma_cfg->aal = of_property_read_bool(np, "snps,aal"); 600 dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst"); 601 dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst"); 602 603 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode"); 604 if (plat->force_thresh_dma_mode && plat->force_sf_dma_mode) { 605 plat->force_sf_dma_mode = 0; 606 dev_warn(&pdev->dev, 607 "force_sf_dma_mode is ignored if force_thresh_dma_mode is set.\n"); 608 } 609 610 of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed); 611 612 plat->axi = stmmac_axi_setup(pdev); 613 614 rc = stmmac_mtl_setup(pdev, plat); 615 if (rc) { 616 ret = ERR_PTR(rc); 617 goto error_put_mdio; 618 } 619 620 /* clock setup */ 621 if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) { 622 plat->stmmac_clk = devm_clk_get(&pdev->dev, 623 STMMAC_RESOURCE_NAME); 624 if (IS_ERR(plat->stmmac_clk)) { 625 dev_warn(&pdev->dev, "Cannot get CSR clock\n"); 626 plat->stmmac_clk = NULL; 627 } 628 clk_prepare_enable(plat->stmmac_clk); 629 } 630 631 plat->pclk = devm_clk_get_optional(&pdev->dev, "pclk"); 632 if (IS_ERR(plat->pclk)) { 633 ret = plat->pclk; 634 goto error_pclk_get; 635 } 636 clk_prepare_enable(plat->pclk); 637 638 /* Fall-back to main clock in case of no PTP ref is passed */ 639 plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref"); 640 if (IS_ERR(plat->clk_ptp_ref)) { 641 plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk); 642 plat->clk_ptp_ref = NULL; 643 dev_info(&pdev->dev, "PTP uses main clock\n"); 644 } else { 645 plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref); 646 dev_dbg(&pdev->dev, "PTP rate %lu\n", plat->clk_ptp_rate); 647 } 648 649 plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev, 650 STMMAC_RESOURCE_NAME); 651 if (IS_ERR(plat->stmmac_rst)) { 652 ret = plat->stmmac_rst; 653 goto error_hw_init; 654 } 655 656 plat->stmmac_ahb_rst = devm_reset_control_get_optional_shared( 657 &pdev->dev, "ahb"); 658 if (IS_ERR(plat->stmmac_ahb_rst)) { 659 ret = plat->stmmac_ahb_rst; 660 goto error_hw_init; 661 } 662 663 return plat; 664 665 error_hw_init: 666 clk_disable_unprepare(plat->pclk); 667 error_pclk_get: 668 clk_disable_unprepare(plat->stmmac_clk); 669 error_put_mdio: 670 of_node_put(plat->mdio_node); 671 error_put_phy: 672 of_node_put(plat->phy_node); 673 674 return ret; 675 } 676 677 static void devm_stmmac_remove_config_dt(void *data) 678 { 679 struct plat_stmmacenet_data *plat = data; 680 681 clk_disable_unprepare(plat->stmmac_clk); 682 clk_disable_unprepare(plat->pclk); 683 of_node_put(plat->mdio_node); 684 of_node_put(plat->phy_node); 685 } 686 687 /** 688 * devm_stmmac_probe_config_dt 689 * @pdev: platform_device structure 690 * @mac: MAC address to use 691 * Description: Devres variant of stmmac_probe_config_dt(). 692 */ 693 struct plat_stmmacenet_data * 694 devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) 695 { 696 struct plat_stmmacenet_data *plat; 697 int ret; 698 699 plat = stmmac_probe_config_dt(pdev, mac); 700 if (IS_ERR(plat)) 701 return plat; 702 703 ret = devm_add_action_or_reset(&pdev->dev, 704 devm_stmmac_remove_config_dt, plat); 705 if (ret) 706 return ERR_PTR(ret); 707 708 return plat; 709 } 710 #else 711 struct plat_stmmacenet_data * 712 devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) 713 { 714 return ERR_PTR(-EINVAL); 715 } 716 #endif /* CONFIG_OF */ 717 EXPORT_SYMBOL_GPL(devm_stmmac_probe_config_dt); 718 719 struct clk *stmmac_pltfr_find_clk(struct plat_stmmacenet_data *plat_dat, 720 const char *name) 721 { 722 for (int i = 0; i < plat_dat->num_clks; i++) 723 if (strcmp(plat_dat->clks[i].id, name) == 0) 724 return plat_dat->clks[i].clk; 725 726 return NULL; 727 } 728 EXPORT_SYMBOL_GPL(stmmac_pltfr_find_clk); 729 730 int stmmac_get_platform_resources(struct platform_device *pdev, 731 struct stmmac_resources *stmmac_res) 732 { 733 memset(stmmac_res, 0, sizeof(*stmmac_res)); 734 735 /* Get IRQ information early to have an ability to ask for deferred 736 * probe if needed before we went too far with resource allocation. 737 */ 738 stmmac_res->irq = platform_get_irq_byname(pdev, "macirq"); 739 if (stmmac_res->irq < 0) 740 return stmmac_res->irq; 741 742 /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq 743 * The external wake up irq can be passed through the platform code 744 * named as "eth_wake_irq" 745 * 746 * In case the wake up interrupt is not passed from the platform 747 * so the driver will continue to use the mac irq (ndev->irq) 748 */ 749 stmmac_res->wol_irq = 750 platform_get_irq_byname_optional(pdev, "eth_wake_irq"); 751 if (stmmac_res->wol_irq < 0) { 752 if (stmmac_res->wol_irq == -EPROBE_DEFER) 753 return -EPROBE_DEFER; 754 dev_info(&pdev->dev, "IRQ eth_wake_irq not found\n"); 755 stmmac_res->wol_irq = stmmac_res->irq; 756 } 757 758 stmmac_res->lpi_irq = 759 platform_get_irq_byname_optional(pdev, "eth_lpi"); 760 if (stmmac_res->lpi_irq < 0) { 761 if (stmmac_res->lpi_irq == -EPROBE_DEFER) 762 return -EPROBE_DEFER; 763 dev_info(&pdev->dev, "IRQ eth_lpi not found\n"); 764 } 765 766 stmmac_res->sfty_irq = 767 platform_get_irq_byname_optional(pdev, "sfty"); 768 if (stmmac_res->sfty_irq < 0) { 769 if (stmmac_res->sfty_irq == -EPROBE_DEFER) 770 return -EPROBE_DEFER; 771 dev_info(&pdev->dev, "IRQ sfty not found\n"); 772 } 773 774 stmmac_res->addr = devm_platform_ioremap_resource(pdev, 0); 775 776 return PTR_ERR_OR_ZERO(stmmac_res->addr); 777 } 778 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources); 779 780 /** 781 * stmmac_pltfr_init 782 * @pdev: pointer to the platform device 783 * @plat: driver data platform structure 784 * Description: Call the platform's init callback (if any) and propagate 785 * the return value. 786 */ 787 static int stmmac_pltfr_init(struct platform_device *pdev, 788 struct plat_stmmacenet_data *plat) 789 { 790 int ret = 0; 791 792 if (plat->init) 793 ret = plat->init(pdev, plat->bsp_priv); 794 795 return ret; 796 } 797 798 /** 799 * stmmac_pltfr_exit 800 * @pdev: pointer to the platform device 801 * @plat: driver data platform structure 802 * Description: Call the platform's exit callback (if any). 803 */ 804 static void stmmac_pltfr_exit(struct platform_device *pdev, 805 struct plat_stmmacenet_data *plat) 806 { 807 if (plat->exit) 808 plat->exit(pdev, plat->bsp_priv); 809 } 810 811 /** 812 * stmmac_pltfr_probe 813 * @pdev: platform device pointer 814 * @plat: driver data platform structure 815 * @res: stmmac resources structure 816 * Description: This calls the platform's init() callback and probes the 817 * stmmac driver. 818 */ 819 int stmmac_pltfr_probe(struct platform_device *pdev, 820 struct plat_stmmacenet_data *plat, 821 struct stmmac_resources *res) 822 { 823 int ret; 824 825 ret = stmmac_pltfr_init(pdev, plat); 826 if (ret) 827 return ret; 828 829 ret = stmmac_dvr_probe(&pdev->dev, plat, res); 830 if (ret) { 831 stmmac_pltfr_exit(pdev, plat); 832 return ret; 833 } 834 835 return ret; 836 } 837 EXPORT_SYMBOL_GPL(stmmac_pltfr_probe); 838 839 static void devm_stmmac_pltfr_remove(void *data) 840 { 841 struct platform_device *pdev = data; 842 843 stmmac_pltfr_remove(pdev); 844 } 845 846 /** 847 * devm_stmmac_pltfr_probe 848 * @pdev: pointer to the platform device 849 * @plat: driver data platform structure 850 * @res: stmmac resources 851 * Description: Devres variant of stmmac_pltfr_probe(). Allows users to skip 852 * calling stmmac_pltfr_remove() on driver detach. 853 */ 854 int devm_stmmac_pltfr_probe(struct platform_device *pdev, 855 struct plat_stmmacenet_data *plat, 856 struct stmmac_resources *res) 857 { 858 int ret; 859 860 ret = stmmac_pltfr_probe(pdev, plat, res); 861 if (ret) 862 return ret; 863 864 return devm_add_action_or_reset(&pdev->dev, devm_stmmac_pltfr_remove, 865 pdev); 866 } 867 EXPORT_SYMBOL_GPL(devm_stmmac_pltfr_probe); 868 869 /** 870 * stmmac_pltfr_remove 871 * @pdev: pointer to the platform device 872 * Description: This undoes the effects of stmmac_pltfr_probe() by removing the 873 * driver and calling the platform's exit() callback. 874 */ 875 void stmmac_pltfr_remove(struct platform_device *pdev) 876 { 877 struct net_device *ndev = platform_get_drvdata(pdev); 878 struct stmmac_priv *priv = netdev_priv(ndev); 879 struct plat_stmmacenet_data *plat = priv->plat; 880 881 stmmac_dvr_remove(&pdev->dev); 882 stmmac_pltfr_exit(pdev, plat); 883 } 884 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove); 885 886 /** 887 * stmmac_pltfr_suspend 888 * @dev: device pointer 889 * Description: this function is invoked when suspend the driver and it direcly 890 * call the main suspend function and then, if required, on some platform, it 891 * can call an exit helper. 892 */ 893 static int __maybe_unused stmmac_pltfr_suspend(struct device *dev) 894 { 895 int ret; 896 struct net_device *ndev = dev_get_drvdata(dev); 897 struct stmmac_priv *priv = netdev_priv(ndev); 898 struct platform_device *pdev = to_platform_device(dev); 899 900 ret = stmmac_suspend(dev); 901 stmmac_pltfr_exit(pdev, priv->plat); 902 903 return ret; 904 } 905 906 /** 907 * stmmac_pltfr_resume 908 * @dev: device pointer 909 * Description: this function is invoked when resume the driver before calling 910 * the main resume function, on some platforms, it can call own init helper 911 * if required. 912 */ 913 static int __maybe_unused stmmac_pltfr_resume(struct device *dev) 914 { 915 struct net_device *ndev = dev_get_drvdata(dev); 916 struct stmmac_priv *priv = netdev_priv(ndev); 917 struct platform_device *pdev = to_platform_device(dev); 918 int ret; 919 920 ret = stmmac_pltfr_init(pdev, priv->plat); 921 if (ret) 922 return ret; 923 924 return stmmac_resume(dev); 925 } 926 927 static int __maybe_unused stmmac_runtime_suspend(struct device *dev) 928 { 929 struct net_device *ndev = dev_get_drvdata(dev); 930 struct stmmac_priv *priv = netdev_priv(ndev); 931 932 stmmac_bus_clks_config(priv, false); 933 934 return 0; 935 } 936 937 static int __maybe_unused stmmac_runtime_resume(struct device *dev) 938 { 939 struct net_device *ndev = dev_get_drvdata(dev); 940 struct stmmac_priv *priv = netdev_priv(ndev); 941 942 return stmmac_bus_clks_config(priv, true); 943 } 944 945 static int __maybe_unused stmmac_pltfr_noirq_suspend(struct device *dev) 946 { 947 struct net_device *ndev = dev_get_drvdata(dev); 948 struct stmmac_priv *priv = netdev_priv(ndev); 949 int ret; 950 951 if (!netif_running(ndev)) 952 return 0; 953 954 if (!device_may_wakeup(priv->device) || !priv->plat->pmt) { 955 /* Disable clock in case of PWM is off */ 956 clk_disable_unprepare(priv->plat->clk_ptp_ref); 957 958 ret = pm_runtime_force_suspend(dev); 959 if (ret) 960 return ret; 961 } 962 963 return 0; 964 } 965 966 static int __maybe_unused stmmac_pltfr_noirq_resume(struct device *dev) 967 { 968 struct net_device *ndev = dev_get_drvdata(dev); 969 struct stmmac_priv *priv = netdev_priv(ndev); 970 int ret; 971 972 if (!netif_running(ndev)) 973 return 0; 974 975 if (!device_may_wakeup(priv->device) || !priv->plat->pmt) { 976 /* enable the clk previously disabled */ 977 ret = pm_runtime_force_resume(dev); 978 if (ret) 979 return ret; 980 981 ret = clk_prepare_enable(priv->plat->clk_ptp_ref); 982 if (ret < 0) { 983 netdev_warn(priv->dev, 984 "failed to enable PTP reference clock: %pe\n", 985 ERR_PTR(ret)); 986 return ret; 987 } 988 } 989 990 return 0; 991 } 992 993 const struct dev_pm_ops stmmac_pltfr_pm_ops = { 994 SET_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_suspend, stmmac_pltfr_resume) 995 SET_RUNTIME_PM_OPS(stmmac_runtime_suspend, stmmac_runtime_resume, NULL) 996 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_noirq_suspend, stmmac_pltfr_noirq_resume) 997 }; 998 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops); 999 1000 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support"); 1001 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 1002 MODULE_LICENSE("GPL"); 1003