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/io.h> 27 #include <linux/of.h> 28 #include <linux/of_net.h> 29 #include <linux/of_device.h> 30 31 #include "stmmac.h" 32 #include "stmmac_platform.h" 33 34 static const struct of_device_id stmmac_dt_ids[] = { 35 /* SoC specific glue layers should come before generic bindings */ 36 { .compatible = "rockchip,rk3288-gmac", .data = &rk3288_gmac_data}, 37 { .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data}, 38 { .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data}, 39 { .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data}, 40 { .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data}, 41 { .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data}, 42 { .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data}, 43 { .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data }, 44 { .compatible = "st,spear600-gmac"}, 45 { .compatible = "snps,dwmac-3.610"}, 46 { .compatible = "snps,dwmac-3.70a"}, 47 { .compatible = "snps,dwmac-3.710"}, 48 { .compatible = "snps,dwmac"}, 49 { /* sentinel */ } 50 }; 51 MODULE_DEVICE_TABLE(of, stmmac_dt_ids); 52 53 #ifdef CONFIG_OF 54 55 /** 56 * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins 57 * @mcast_bins: Multicast filtering bins 58 * Description: 59 * this function validates the number of Multicast filtering bins specified 60 * by the configuration through the device tree. The Synopsys GMAC supports 61 * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC 62 * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds 63 * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is 64 * invalid and will cause the filtering algorithm to use Multicast 65 * promiscuous mode. 66 */ 67 static int dwmac1000_validate_mcast_bins(int mcast_bins) 68 { 69 int x = mcast_bins; 70 71 switch (x) { 72 case HASH_TABLE_SIZE: 73 case 128: 74 case 256: 75 break; 76 default: 77 x = 0; 78 pr_info("Hash table entries set to unexpected value %d", 79 mcast_bins); 80 break; 81 } 82 return x; 83 } 84 85 /** 86 * dwmac1000_validate_ucast_entries - validate the Unicast address entries 87 * @ucast_entries: number of Unicast address entries 88 * Description: 89 * This function validates the number of Unicast address entries supported 90 * by a particular Synopsys 10/100/1000 controller. The Synopsys controller 91 * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter 92 * logic. This function validates a valid, supported configuration is 93 * selected, and defaults to 1 Unicast address if an unsupported 94 * configuration is selected. 95 */ 96 static int dwmac1000_validate_ucast_entries(int ucast_entries) 97 { 98 int x = ucast_entries; 99 100 switch (x) { 101 case 1: 102 case 32: 103 case 64: 104 case 128: 105 break; 106 default: 107 x = 1; 108 pr_info("Unicast table entries set to unexpected value %d\n", 109 ucast_entries); 110 break; 111 } 112 return x; 113 } 114 115 /** 116 * stmmac_probe_config_dt - parse device-tree driver parameters 117 * @pdev: platform_device structure 118 * @plat: driver data platform structure 119 * @mac: MAC address to use 120 * Description: 121 * this function is to read the driver parameters from device-tree and 122 * set some private fields that will be used by the main at runtime. 123 */ 124 static int stmmac_probe_config_dt(struct platform_device *pdev, 125 struct plat_stmmacenet_data *plat, 126 const char **mac) 127 { 128 struct device_node *np = pdev->dev.of_node; 129 struct stmmac_dma_cfg *dma_cfg; 130 const struct of_device_id *device; 131 132 if (!np) 133 return -ENODEV; 134 135 device = of_match_device(stmmac_dt_ids, &pdev->dev); 136 if (!device) 137 return -ENODEV; 138 139 if (device->data) { 140 const struct stmmac_of_data *data = device->data; 141 plat->has_gmac = data->has_gmac; 142 plat->enh_desc = data->enh_desc; 143 plat->tx_coe = data->tx_coe; 144 plat->rx_coe = data->rx_coe; 145 plat->bugged_jumbo = data->bugged_jumbo; 146 plat->pmt = data->pmt; 147 plat->riwt_off = data->riwt_off; 148 plat->fix_mac_speed = data->fix_mac_speed; 149 plat->bus_setup = data->bus_setup; 150 plat->setup = data->setup; 151 plat->free = data->free; 152 plat->init = data->init; 153 plat->exit = data->exit; 154 } 155 156 *mac = of_get_mac_address(np); 157 plat->interface = of_get_phy_mode(np); 158 159 /* Get max speed of operation from device tree */ 160 if (of_property_read_u32(np, "max-speed", &plat->max_speed)) 161 plat->max_speed = -1; 162 163 plat->bus_id = of_alias_get_id(np, "ethernet"); 164 if (plat->bus_id < 0) 165 plat->bus_id = 0; 166 167 /* Default to phy auto-detection */ 168 plat->phy_addr = -1; 169 170 /* "snps,phy-addr" is not a standard property. Mark it as deprecated 171 * and warn of its use. Remove this when phy node support is added. 172 */ 173 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0) 174 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n"); 175 176 if (plat->phy_bus_name) 177 plat->mdio_bus_data = NULL; 178 else 179 plat->mdio_bus_data = 180 devm_kzalloc(&pdev->dev, 181 sizeof(struct stmmac_mdio_bus_data), 182 GFP_KERNEL); 183 184 of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size); 185 186 of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size); 187 188 plat->force_sf_dma_mode = 189 of_property_read_bool(np, "snps,force_sf_dma_mode"); 190 191 /* Set the maxmtu to a default of JUMBO_LEN in case the 192 * parameter is not present in the device tree. 193 */ 194 plat->maxmtu = JUMBO_LEN; 195 196 /* 197 * Currently only the properties needed on SPEAr600 198 * are provided. All other properties should be added 199 * once needed on other platforms. 200 */ 201 if (of_device_is_compatible(np, "st,spear600-gmac") || 202 of_device_is_compatible(np, "snps,dwmac-3.70a") || 203 of_device_is_compatible(np, "snps,dwmac")) { 204 /* Note that the max-frame-size parameter as defined in the 205 * ePAPR v1.1 spec is defined as max-frame-size, it's 206 * actually used as the IEEE definition of MAC Client 207 * data, or MTU. The ePAPR specification is confusing as 208 * the definition is max-frame-size, but usage examples 209 * are clearly MTUs 210 */ 211 of_property_read_u32(np, "max-frame-size", &plat->maxmtu); 212 of_property_read_u32(np, "snps,multicast-filter-bins", 213 &plat->multicast_filter_bins); 214 of_property_read_u32(np, "snps,perfect-filter-entries", 215 &plat->unicast_filter_entries); 216 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries( 217 plat->unicast_filter_entries); 218 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins( 219 plat->multicast_filter_bins); 220 plat->has_gmac = 1; 221 plat->pmt = 1; 222 } 223 224 if (of_device_is_compatible(np, "snps,dwmac-3.610") || 225 of_device_is_compatible(np, "snps,dwmac-3.710")) { 226 plat->enh_desc = 1; 227 plat->bugged_jumbo = 1; 228 plat->force_sf_dma_mode = 1; 229 } 230 231 if (of_find_property(np, "snps,pbl", NULL)) { 232 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), 233 GFP_KERNEL); 234 if (!dma_cfg) 235 return -ENOMEM; 236 plat->dma_cfg = dma_cfg; 237 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); 238 dma_cfg->fixed_burst = 239 of_property_read_bool(np, "snps,fixed-burst"); 240 dma_cfg->mixed_burst = 241 of_property_read_bool(np, "snps,mixed-burst"); 242 of_property_read_u32(np, "snps,burst_len", &dma_cfg->burst_len); 243 if (dma_cfg->burst_len < 0 || dma_cfg->burst_len > 256) 244 dma_cfg->burst_len = 0; 245 } 246 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode"); 247 if (plat->force_thresh_dma_mode) { 248 plat->force_sf_dma_mode = 0; 249 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set."); 250 } 251 252 return 0; 253 } 254 #else 255 static int stmmac_probe_config_dt(struct platform_device *pdev, 256 struct plat_stmmacenet_data *plat, 257 const char **mac) 258 { 259 return -ENOSYS; 260 } 261 #endif /* CONFIG_OF */ 262 263 /** 264 * stmmac_pltfr_probe - platform driver probe. 265 * @pdev: platform device pointer 266 * Description: platform_device probe function. It is to allocate 267 * the necessary platform resources, invoke custom helper (if required) and 268 * invoke the main probe function. 269 */ 270 static int stmmac_pltfr_probe(struct platform_device *pdev) 271 { 272 int ret = 0; 273 struct resource *res; 274 struct device *dev = &pdev->dev; 275 void __iomem *addr = NULL; 276 struct stmmac_priv *priv = NULL; 277 struct plat_stmmacenet_data *plat_dat = NULL; 278 const char *mac = NULL; 279 int irq, wol_irq, lpi_irq; 280 281 /* Get IRQ information early to have an ability to ask for deferred 282 * probe if needed before we went too far with resource allocation. 283 */ 284 irq = platform_get_irq_byname(pdev, "macirq"); 285 if (irq < 0) { 286 if (irq != -EPROBE_DEFER) { 287 dev_err(dev, 288 "MAC IRQ configuration information not found\n"); 289 } 290 return irq; 291 } 292 293 /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq 294 * The external wake up irq can be passed through the platform code 295 * named as "eth_wake_irq" 296 * 297 * In case the wake up interrupt is not passed from the platform 298 * so the driver will continue to use the mac irq (ndev->irq) 299 */ 300 wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 301 if (wol_irq < 0) { 302 if (wol_irq == -EPROBE_DEFER) 303 return -EPROBE_DEFER; 304 wol_irq = irq; 305 } 306 307 lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); 308 if (lpi_irq == -EPROBE_DEFER) 309 return -EPROBE_DEFER; 310 311 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 312 addr = devm_ioremap_resource(dev, res); 313 if (IS_ERR(addr)) 314 return PTR_ERR(addr); 315 316 plat_dat = dev_get_platdata(&pdev->dev); 317 318 if (!plat_dat) 319 plat_dat = devm_kzalloc(&pdev->dev, 320 sizeof(struct plat_stmmacenet_data), 321 GFP_KERNEL); 322 if (!plat_dat) { 323 pr_err("%s: ERROR: no memory", __func__); 324 return -ENOMEM; 325 } 326 327 /* Set default value for multicast hash bins */ 328 plat_dat->multicast_filter_bins = HASH_TABLE_SIZE; 329 330 /* Set default value for unicast filter entries */ 331 plat_dat->unicast_filter_entries = 1; 332 333 if (pdev->dev.of_node) { 334 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); 335 if (ret) { 336 pr_err("%s: main dt probe failed", __func__); 337 return ret; 338 } 339 } 340 341 /* Custom setup (if needed) */ 342 if (plat_dat->setup) { 343 plat_dat->bsp_priv = plat_dat->setup(pdev); 344 if (IS_ERR(plat_dat->bsp_priv)) 345 return PTR_ERR(plat_dat->bsp_priv); 346 } 347 348 /* Custom initialisation (if needed)*/ 349 if (plat_dat->init) { 350 ret = plat_dat->init(pdev, plat_dat->bsp_priv); 351 if (unlikely(ret)) 352 return ret; 353 } 354 355 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); 356 if (IS_ERR(priv)) { 357 pr_err("%s: main driver probe failed", __func__); 358 return PTR_ERR(priv); 359 } 360 361 /* Copy IRQ values to priv structure which is now avaialble */ 362 priv->dev->irq = irq; 363 priv->wol_irq = wol_irq; 364 priv->lpi_irq = lpi_irq; 365 366 /* Get MAC address if available (DT) */ 367 if (mac) 368 memcpy(priv->dev->dev_addr, mac, ETH_ALEN); 369 370 platform_set_drvdata(pdev, priv->dev); 371 372 pr_debug("STMMAC platform driver registration completed"); 373 374 return 0; 375 } 376 377 /** 378 * stmmac_pltfr_remove 379 * @pdev: platform device pointer 380 * Description: this function calls the main to free the net resources 381 * and calls the platforms hook and release the resources (e.g. mem). 382 */ 383 static int stmmac_pltfr_remove(struct platform_device *pdev) 384 { 385 struct net_device *ndev = platform_get_drvdata(pdev); 386 struct stmmac_priv *priv = netdev_priv(ndev); 387 int ret = stmmac_dvr_remove(ndev); 388 389 if (priv->plat->exit) 390 priv->plat->exit(pdev, priv->plat->bsp_priv); 391 392 if (priv->plat->free) 393 priv->plat->free(pdev, priv->plat->bsp_priv); 394 395 return ret; 396 } 397 398 #ifdef CONFIG_PM_SLEEP 399 /** 400 * stmmac_pltfr_suspend 401 * @dev: device pointer 402 * Description: this function is invoked when suspend the driver and it direcly 403 * call the main suspend function and then, if required, on some platform, it 404 * can call an exit helper. 405 */ 406 static int stmmac_pltfr_suspend(struct device *dev) 407 { 408 int ret; 409 struct net_device *ndev = dev_get_drvdata(dev); 410 struct stmmac_priv *priv = netdev_priv(ndev); 411 struct platform_device *pdev = to_platform_device(dev); 412 413 ret = stmmac_suspend(ndev); 414 if (priv->plat->exit) 415 priv->plat->exit(pdev, priv->plat->bsp_priv); 416 417 return ret; 418 } 419 420 /** 421 * stmmac_pltfr_resume 422 * @dev: device pointer 423 * Description: this function is invoked when resume the driver before calling 424 * the main resume function, on some platforms, it can call own init helper 425 * if required. 426 */ 427 static int stmmac_pltfr_resume(struct device *dev) 428 { 429 struct net_device *ndev = dev_get_drvdata(dev); 430 struct stmmac_priv *priv = netdev_priv(ndev); 431 struct platform_device *pdev = to_platform_device(dev); 432 433 if (priv->plat->init) 434 priv->plat->init(pdev, priv->plat->bsp_priv); 435 436 return stmmac_resume(ndev); 437 } 438 #endif /* CONFIG_PM_SLEEP */ 439 440 static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, 441 stmmac_pltfr_suspend, stmmac_pltfr_resume); 442 443 static struct platform_driver stmmac_pltfr_driver = { 444 .probe = stmmac_pltfr_probe, 445 .remove = stmmac_pltfr_remove, 446 .driver = { 447 .name = STMMAC_RESOURCE_NAME, 448 .pm = &stmmac_pltfr_pm_ops, 449 .of_match_table = of_match_ptr(stmmac_dt_ids), 450 }, 451 }; 452 453 module_platform_driver(stmmac_pltfr_driver); 454 455 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); 456 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 457 MODULE_LICENSE("GPL"); 458