1 /******************************************************************************* 2 This contains the functions to handle the platform driver. 3 4 Copyright (C) 2007-2011 STMicroelectronics Ltd 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> 23 *******************************************************************************/ 24 25 #include <linux/platform_device.h> 26 #include <linux/module.h> 27 #include <linux/io.h> 28 #include <linux/of.h> 29 #include <linux/of_net.h> 30 #include <linux/of_device.h> 31 #include <linux/of_mdio.h> 32 33 #include "stmmac.h" 34 #include "stmmac_platform.h" 35 36 #ifdef CONFIG_OF 37 38 /** 39 * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins 40 * @mcast_bins: Multicast filtering bins 41 * Description: 42 * this function validates the number of Multicast filtering bins specified 43 * by the configuration through the device tree. The Synopsys GMAC supports 44 * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC 45 * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds 46 * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is 47 * invalid and will cause the filtering algorithm to use Multicast 48 * promiscuous mode. 49 */ 50 static int dwmac1000_validate_mcast_bins(int mcast_bins) 51 { 52 int x = mcast_bins; 53 54 switch (x) { 55 case HASH_TABLE_SIZE: 56 case 128: 57 case 256: 58 break; 59 default: 60 x = 0; 61 pr_info("Hash table entries set to unexpected value %d", 62 mcast_bins); 63 break; 64 } 65 return x; 66 } 67 68 /** 69 * dwmac1000_validate_ucast_entries - validate the Unicast address entries 70 * @ucast_entries: number of Unicast address entries 71 * Description: 72 * This function validates the number of Unicast address entries supported 73 * by a particular Synopsys 10/100/1000 controller. The Synopsys controller 74 * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter 75 * logic. This function validates a valid, supported configuration is 76 * selected, and defaults to 1 Unicast address if an unsupported 77 * configuration is selected. 78 */ 79 static int dwmac1000_validate_ucast_entries(int ucast_entries) 80 { 81 int x = ucast_entries; 82 83 switch (x) { 84 case 1: 85 case 32: 86 case 64: 87 case 128: 88 break; 89 default: 90 x = 1; 91 pr_info("Unicast table entries set to unexpected value %d\n", 92 ucast_entries); 93 break; 94 } 95 return x; 96 } 97 98 /** 99 * stmmac_axi_setup - parse DT parameters for programming the AXI register 100 * @pdev: platform device 101 * @priv: driver private struct. 102 * Description: 103 * if required, from device-tree the AXI internal register can be tuned 104 * by using platform parameters. 105 */ 106 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev) 107 { 108 struct device_node *np; 109 struct stmmac_axi *axi; 110 111 np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0); 112 if (!np) 113 return NULL; 114 115 axi = kzalloc(sizeof(*axi), GFP_KERNEL); 116 if (!axi) { 117 of_node_put(np); 118 return ERR_PTR(-ENOMEM); 119 } 120 121 axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en"); 122 axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm"); 123 axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe"); 124 axi->axi_axi_all = of_property_read_bool(np, "snps,axi_all"); 125 axi->axi_fb = of_property_read_bool(np, "snps,axi_fb"); 126 axi->axi_mb = of_property_read_bool(np, "snps,axi_mb"); 127 axi->axi_rb = of_property_read_bool(np, "snps,axi_rb"); 128 129 of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt); 130 of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt); 131 of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN); 132 of_node_put(np); 133 134 return axi; 135 } 136 137 /** 138 * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources 139 * @plat: driver data platform structure 140 * @np: device tree node 141 * @dev: device pointer 142 * Description: 143 * The mdio bus will be allocated in case of a phy transceiver is on board; 144 * it will be NULL if the fixed-link is configured. 145 * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated 146 * in any case (for DSA, mdio must be registered even if fixed-link). 147 * The table below sums the supported configurations: 148 * ------------------------------- 149 * snps,phy-addr | Y 150 * ------------------------------- 151 * phy-handle | Y 152 * ------------------------------- 153 * fixed-link | N 154 * ------------------------------- 155 * snps,dwmac-mdio | 156 * even if | Y 157 * fixed-link | 158 * ------------------------------- 159 * 160 * It returns 0 in case of success otherwise -ENODEV. 161 */ 162 static int stmmac_dt_phy(struct plat_stmmacenet_data *plat, 163 struct device_node *np, struct device *dev) 164 { 165 bool mdio = true; 166 167 /* If phy-handle property is passed from DT, use it as the PHY */ 168 plat->phy_node = of_parse_phandle(np, "phy-handle", 0); 169 if (plat->phy_node) 170 dev_dbg(dev, "Found phy-handle subnode\n"); 171 172 /* If phy-handle is not specified, check if we have a fixed-phy */ 173 if (!plat->phy_node && of_phy_is_fixed_link(np)) { 174 if ((of_phy_register_fixed_link(np) < 0)) 175 return -ENODEV; 176 177 dev_dbg(dev, "Found fixed-link subnode\n"); 178 plat->phy_node = of_node_get(np); 179 mdio = false; 180 } 181 182 /* If snps,dwmac-mdio is passed from DT, always register the MDIO */ 183 for_each_child_of_node(np, plat->mdio_node) { 184 if (of_device_is_compatible(plat->mdio_node, "snps,dwmac-mdio")) 185 break; 186 } 187 188 if (plat->mdio_node) { 189 dev_dbg(dev, "Found MDIO subnode\n"); 190 mdio = true; 191 } 192 193 if (mdio) 194 plat->mdio_bus_data = 195 devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data), 196 GFP_KERNEL); 197 return 0; 198 } 199 200 /** 201 * stmmac_probe_config_dt - parse device-tree driver parameters 202 * @pdev: platform_device structure 203 * @plat: driver data platform structure 204 * @mac: MAC address to use 205 * Description: 206 * this function is to read the driver parameters from device-tree and 207 * set some private fields that will be used by the main at runtime. 208 */ 209 struct plat_stmmacenet_data * 210 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) 211 { 212 struct device_node *np = pdev->dev.of_node; 213 struct plat_stmmacenet_data *plat; 214 struct stmmac_dma_cfg *dma_cfg; 215 216 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); 217 if (!plat) 218 return ERR_PTR(-ENOMEM); 219 220 *mac = of_get_mac_address(np); 221 plat->interface = of_get_phy_mode(np); 222 223 /* Get max speed of operation from device tree */ 224 if (of_property_read_u32(np, "max-speed", &plat->max_speed)) 225 plat->max_speed = -1; 226 227 plat->bus_id = of_alias_get_id(np, "ethernet"); 228 if (plat->bus_id < 0) 229 plat->bus_id = 0; 230 231 /* Default to phy auto-detection */ 232 plat->phy_addr = -1; 233 234 /* "snps,phy-addr" is not a standard property. Mark it as deprecated 235 * and warn of its use. Remove this when phy node support is added. 236 */ 237 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0) 238 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n"); 239 240 /* To Configure PHY by using all device-tree supported properties */ 241 if (stmmac_dt_phy(plat, np, &pdev->dev)) 242 return ERR_PTR(-ENODEV); 243 244 of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size); 245 246 of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size); 247 248 plat->force_sf_dma_mode = 249 of_property_read_bool(np, "snps,force_sf_dma_mode"); 250 251 /* Set the maxmtu to a default of JUMBO_LEN in case the 252 * parameter is not present in the device tree. 253 */ 254 plat->maxmtu = JUMBO_LEN; 255 256 /* Set default value for multicast hash bins */ 257 plat->multicast_filter_bins = HASH_TABLE_SIZE; 258 259 /* Set default value for unicast filter entries */ 260 plat->unicast_filter_entries = 1; 261 262 /* 263 * Currently only the properties needed on SPEAr600 264 * are provided. All other properties should be added 265 * once needed on other platforms. 266 */ 267 if (of_device_is_compatible(np, "st,spear600-gmac") || 268 of_device_is_compatible(np, "snps,dwmac-3.50a") || 269 of_device_is_compatible(np, "snps,dwmac-3.70a") || 270 of_device_is_compatible(np, "snps,dwmac")) { 271 /* Note that the max-frame-size parameter as defined in the 272 * ePAPR v1.1 spec is defined as max-frame-size, it's 273 * actually used as the IEEE definition of MAC Client 274 * data, or MTU. The ePAPR specification is confusing as 275 * the definition is max-frame-size, but usage examples 276 * are clearly MTUs 277 */ 278 of_property_read_u32(np, "max-frame-size", &plat->maxmtu); 279 of_property_read_u32(np, "snps,multicast-filter-bins", 280 &plat->multicast_filter_bins); 281 of_property_read_u32(np, "snps,perfect-filter-entries", 282 &plat->unicast_filter_entries); 283 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries( 284 plat->unicast_filter_entries); 285 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins( 286 plat->multicast_filter_bins); 287 plat->has_gmac = 1; 288 plat->pmt = 1; 289 } 290 291 if (of_device_is_compatible(np, "snps,dwmac-4.00") || 292 of_device_is_compatible(np, "snps,dwmac-4.10a")) { 293 plat->has_gmac4 = 1; 294 plat->pmt = 1; 295 plat->tso_en = of_property_read_bool(np, "snps,tso"); 296 } 297 298 if (of_device_is_compatible(np, "snps,dwmac-3.610") || 299 of_device_is_compatible(np, "snps,dwmac-3.710")) { 300 plat->enh_desc = 1; 301 plat->bugged_jumbo = 1; 302 plat->force_sf_dma_mode = 1; 303 } 304 305 if (of_find_property(np, "snps,pbl", NULL)) { 306 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), 307 GFP_KERNEL); 308 if (!dma_cfg) { 309 of_node_put(plat->phy_node); 310 return ERR_PTR(-ENOMEM); 311 } 312 plat->dma_cfg = dma_cfg; 313 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); 314 dma_cfg->aal = of_property_read_bool(np, "snps,aal"); 315 dma_cfg->fixed_burst = 316 of_property_read_bool(np, "snps,fixed-burst"); 317 dma_cfg->mixed_burst = 318 of_property_read_bool(np, "snps,mixed-burst"); 319 } 320 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode"); 321 if (plat->force_thresh_dma_mode) { 322 plat->force_sf_dma_mode = 0; 323 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set."); 324 } 325 326 of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed); 327 328 plat->axi = stmmac_axi_setup(pdev); 329 330 return plat; 331 } 332 #else 333 struct plat_stmmacenet_data * 334 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) 335 { 336 return ERR_PTR(-ENOSYS); 337 } 338 #endif /* CONFIG_OF */ 339 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt); 340 341 int stmmac_get_platform_resources(struct platform_device *pdev, 342 struct stmmac_resources *stmmac_res) 343 { 344 struct resource *res; 345 346 memset(stmmac_res, 0, sizeof(*stmmac_res)); 347 348 /* Get IRQ information early to have an ability to ask for deferred 349 * probe if needed before we went too far with resource allocation. 350 */ 351 stmmac_res->irq = platform_get_irq_byname(pdev, "macirq"); 352 if (stmmac_res->irq < 0) { 353 if (stmmac_res->irq != -EPROBE_DEFER) { 354 dev_err(&pdev->dev, 355 "MAC IRQ configuration information not found\n"); 356 } 357 return stmmac_res->irq; 358 } 359 360 /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq 361 * The external wake up irq can be passed through the platform code 362 * named as "eth_wake_irq" 363 * 364 * In case the wake up interrupt is not passed from the platform 365 * so the driver will continue to use the mac irq (ndev->irq) 366 */ 367 stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 368 if (stmmac_res->wol_irq < 0) { 369 if (stmmac_res->wol_irq == -EPROBE_DEFER) 370 return -EPROBE_DEFER; 371 stmmac_res->wol_irq = stmmac_res->irq; 372 } 373 374 stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); 375 if (stmmac_res->lpi_irq == -EPROBE_DEFER) 376 return -EPROBE_DEFER; 377 378 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 379 stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res); 380 381 return PTR_ERR_OR_ZERO(stmmac_res->addr); 382 } 383 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources); 384 385 /** 386 * stmmac_pltfr_remove 387 * @pdev: platform device pointer 388 * Description: this function calls the main to free the net resources 389 * and calls the platforms hook and release the resources (e.g. mem). 390 */ 391 int stmmac_pltfr_remove(struct platform_device *pdev) 392 { 393 struct net_device *ndev = platform_get_drvdata(pdev); 394 struct stmmac_priv *priv = netdev_priv(ndev); 395 int ret = stmmac_dvr_remove(&pdev->dev); 396 397 if (priv->plat->exit) 398 priv->plat->exit(pdev, priv->plat->bsp_priv); 399 400 return ret; 401 } 402 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove); 403 404 #ifdef CONFIG_PM_SLEEP 405 /** 406 * stmmac_pltfr_suspend 407 * @dev: device pointer 408 * Description: this function is invoked when suspend the driver and it direcly 409 * call the main suspend function and then, if required, on some platform, it 410 * can call an exit helper. 411 */ 412 static int stmmac_pltfr_suspend(struct device *dev) 413 { 414 int ret; 415 struct net_device *ndev = dev_get_drvdata(dev); 416 struct stmmac_priv *priv = netdev_priv(ndev); 417 struct platform_device *pdev = to_platform_device(dev); 418 419 ret = stmmac_suspend(dev); 420 if (priv->plat->exit) 421 priv->plat->exit(pdev, priv->plat->bsp_priv); 422 423 return ret; 424 } 425 426 /** 427 * stmmac_pltfr_resume 428 * @dev: device pointer 429 * Description: this function is invoked when resume the driver before calling 430 * the main resume function, on some platforms, it can call own init helper 431 * if required. 432 */ 433 static int stmmac_pltfr_resume(struct device *dev) 434 { 435 struct net_device *ndev = dev_get_drvdata(dev); 436 struct stmmac_priv *priv = netdev_priv(ndev); 437 struct platform_device *pdev = to_platform_device(dev); 438 439 if (priv->plat->init) 440 priv->plat->init(pdev, priv->plat->bsp_priv); 441 442 return stmmac_resume(dev); 443 } 444 #endif /* CONFIG_PM_SLEEP */ 445 446 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend, 447 stmmac_pltfr_resume); 448 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops); 449 450 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support"); 451 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 452 MODULE_LICENSE("GPL"); 453