1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later 2 /* 3 * Copyright 2008 - 2015 Freescale Semiconductor Inc. 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/init.h> 9 #include <linux/module.h> 10 #include <linux/of_address.h> 11 #include <linux/of_platform.h> 12 #include <linux/of_net.h> 13 #include <linux/of_mdio.h> 14 #include <linux/device.h> 15 #include <linux/phy.h> 16 #include <linux/netdevice.h> 17 #include <linux/phy_fixed.h> 18 #include <linux/phylink.h> 19 #include <linux/etherdevice.h> 20 #include <linux/libfdt_env.h> 21 #include <linux/platform_device.h> 22 23 #include "mac.h" 24 #include "fman_mac.h" 25 #include "fman_dtsec.h" 26 #include "fman_tgec.h" 27 #include "fman_memac.h" 28 29 MODULE_LICENSE("Dual BSD/GPL"); 30 MODULE_DESCRIPTION("FSL FMan MAC API based driver"); 31 32 struct mac_priv_s { 33 u8 cell_index; 34 struct fman *fman; 35 /* List of multicast addresses */ 36 struct list_head mc_addr_list; 37 struct platform_device *eth_dev; 38 u16 speed; 39 }; 40 41 struct mac_address { 42 u8 addr[ETH_ALEN]; 43 struct list_head list; 44 }; 45 46 static void mac_exception(struct mac_device *mac_dev, 47 enum fman_mac_exceptions ex) 48 { 49 if (ex == FM_MAC_EX_10G_RX_FIFO_OVFL) { 50 /* don't flag RX FIFO after the first */ 51 mac_dev->set_exception(mac_dev->fman_mac, 52 FM_MAC_EX_10G_RX_FIFO_OVFL, false); 53 dev_err(mac_dev->dev, "10G MAC got RX FIFO Error = %x\n", ex); 54 } 55 56 dev_dbg(mac_dev->dev, "%s:%s() -> %d\n", KBUILD_BASENAME ".c", 57 __func__, ex); 58 } 59 60 int fman_set_multi(struct net_device *net_dev, struct mac_device *mac_dev) 61 { 62 struct mac_priv_s *priv; 63 struct mac_address *old_addr, *tmp; 64 struct netdev_hw_addr *ha; 65 int err; 66 enet_addr_t *addr; 67 68 priv = mac_dev->priv; 69 70 /* Clear previous address list */ 71 list_for_each_entry_safe(old_addr, tmp, &priv->mc_addr_list, list) { 72 addr = (enet_addr_t *)old_addr->addr; 73 err = mac_dev->remove_hash_mac_addr(mac_dev->fman_mac, addr); 74 if (err < 0) 75 return err; 76 77 list_del(&old_addr->list); 78 kfree(old_addr); 79 } 80 81 /* Add all the addresses from the new list */ 82 netdev_for_each_mc_addr(ha, net_dev) { 83 addr = (enet_addr_t *)ha->addr; 84 err = mac_dev->add_hash_mac_addr(mac_dev->fman_mac, addr); 85 if (err < 0) 86 return err; 87 88 tmp = kmalloc(sizeof(*tmp), GFP_ATOMIC); 89 if (!tmp) 90 return -ENOMEM; 91 92 ether_addr_copy(tmp->addr, ha->addr); 93 list_add(&tmp->list, &priv->mc_addr_list); 94 } 95 return 0; 96 } 97 98 static DEFINE_MUTEX(eth_lock); 99 100 static struct platform_device *dpaa_eth_add_device(int fman_id, 101 struct mac_device *mac_dev) 102 { 103 struct platform_device *pdev; 104 struct dpaa_eth_data data; 105 struct mac_priv_s *priv; 106 static int dpaa_eth_dev_cnt; 107 int ret; 108 109 priv = mac_dev->priv; 110 111 data.mac_dev = mac_dev; 112 data.mac_hw_id = priv->cell_index; 113 data.fman_hw_id = fman_id; 114 115 mutex_lock(ð_lock); 116 pdev = platform_device_alloc("dpaa-ethernet", dpaa_eth_dev_cnt); 117 if (!pdev) { 118 ret = -ENOMEM; 119 goto no_mem; 120 } 121 122 pdev->dev.parent = mac_dev->dev; 123 124 ret = platform_device_add_data(pdev, &data, sizeof(data)); 125 if (ret) 126 goto err; 127 128 ret = platform_device_add(pdev); 129 if (ret) 130 goto err; 131 132 dpaa_eth_dev_cnt++; 133 mutex_unlock(ð_lock); 134 135 return pdev; 136 137 err: 138 platform_device_put(pdev); 139 no_mem: 140 mutex_unlock(ð_lock); 141 142 return ERR_PTR(ret); 143 } 144 145 static const struct of_device_id mac_match[] = { 146 { .compatible = "fsl,fman-dtsec", .data = dtsec_initialization }, 147 { .compatible = "fsl,fman-xgec", .data = tgec_initialization }, 148 { .compatible = "fsl,fman-memac", .data = memac_initialization }, 149 {} 150 }; 151 MODULE_DEVICE_TABLE(of, mac_match); 152 153 static int mac_probe(struct platform_device *_of_dev) 154 { 155 int err, i, nph; 156 int (*init)(struct mac_device *mac_dev, struct device_node *mac_node, 157 struct fman_mac_params *params); 158 struct device *dev; 159 struct device_node *mac_node, *dev_node; 160 struct mac_device *mac_dev; 161 struct platform_device *of_dev; 162 struct mac_priv_s *priv; 163 struct fman_mac_params params; 164 u32 val; 165 u8 fman_id; 166 phy_interface_t phy_if; 167 168 dev = &_of_dev->dev; 169 mac_node = dev->of_node; 170 init = of_device_get_match_data(dev); 171 172 mac_dev = devm_kzalloc(dev, sizeof(*mac_dev), GFP_KERNEL); 173 if (!mac_dev) 174 return -ENOMEM; 175 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 176 if (!priv) 177 return -ENOMEM; 178 platform_set_drvdata(_of_dev, mac_dev); 179 180 /* Save private information */ 181 mac_dev->priv = priv; 182 mac_dev->dev = dev; 183 184 INIT_LIST_HEAD(&priv->mc_addr_list); 185 186 /* Get the FM node */ 187 dev_node = of_get_parent(mac_node); 188 if (!dev_node) { 189 dev_err(dev, "of_get_parent(%pOF) failed\n", 190 mac_node); 191 return -EINVAL; 192 } 193 194 of_dev = of_find_device_by_node(dev_node); 195 if (!of_dev) { 196 dev_err(dev, "of_find_device_by_node(%pOF) failed\n", dev_node); 197 err = -EINVAL; 198 goto _return_of_node_put; 199 } 200 mac_dev->fman_dev = &of_dev->dev; 201 202 /* Get the FMan cell-index */ 203 err = of_property_read_u32(dev_node, "cell-index", &val); 204 if (err) { 205 dev_err(dev, "failed to read cell-index for %pOF\n", dev_node); 206 err = -EINVAL; 207 goto _return_dev_put; 208 } 209 /* cell-index 0 => FMan id 1 */ 210 fman_id = (u8)(val + 1); 211 212 priv->fman = fman_bind(mac_dev->fman_dev); 213 if (!priv->fman) { 214 dev_err(dev, "fman_bind(%pOF) failed\n", dev_node); 215 err = -ENODEV; 216 goto _return_dev_put; 217 } 218 219 /* Two references have been taken in of_find_device_by_node() 220 * and fman_bind(). Release one of them here. The second one 221 * will be released in mac_remove(). 222 */ 223 put_device(mac_dev->fman_dev); 224 of_node_put(dev_node); 225 dev_node = NULL; 226 227 /* Get the address of the memory mapped registers */ 228 mac_dev->res = platform_get_mem_or_io(_of_dev, 0); 229 if (!mac_dev->res) { 230 dev_err(dev, "could not get registers\n"); 231 err = -EINVAL; 232 goto _return_dev_put; 233 } 234 235 err = devm_request_resource(dev, fman_get_mem_region(priv->fman), 236 mac_dev->res); 237 if (err) { 238 dev_err_probe(dev, err, "could not request resource\n"); 239 goto _return_dev_put; 240 } 241 242 mac_dev->vaddr = devm_ioremap(dev, mac_dev->res->start, 243 resource_size(mac_dev->res)); 244 if (!mac_dev->vaddr) { 245 dev_err(dev, "devm_ioremap() failed\n"); 246 err = -EIO; 247 goto _return_dev_put; 248 } 249 250 if (!of_device_is_available(mac_node)) { 251 err = -ENODEV; 252 goto _return_dev_put; 253 } 254 255 /* Get the cell-index */ 256 err = of_property_read_u32(mac_node, "cell-index", &val); 257 if (err) { 258 dev_err(dev, "failed to read cell-index for %pOF\n", mac_node); 259 err = -EINVAL; 260 goto _return_dev_put; 261 } 262 priv->cell_index = (u8)val; 263 264 /* Get the MAC address */ 265 err = of_get_mac_address(mac_node, mac_dev->addr); 266 if (err) 267 dev_warn(dev, "of_get_mac_address(%pOF) failed\n", mac_node); 268 269 /* Get the port handles */ 270 nph = of_count_phandle_with_args(mac_node, "fsl,fman-ports", NULL); 271 if (unlikely(nph < 0)) { 272 dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n", 273 mac_node); 274 err = nph; 275 goto _return_dev_put; 276 } 277 278 if (nph != ARRAY_SIZE(mac_dev->port)) { 279 dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n", 280 mac_node); 281 err = -EINVAL; 282 goto _return_dev_put; 283 } 284 285 /* PORT_NUM determines the size of the port array */ 286 for (i = 0; i < PORT_NUM; i++) { 287 /* Find the port node */ 288 dev_node = of_parse_phandle(mac_node, "fsl,fman-ports", i); 289 if (!dev_node) { 290 dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n", 291 mac_node); 292 err = -EINVAL; 293 goto _return_dev_arr_put; 294 } 295 296 of_dev = of_find_device_by_node(dev_node); 297 if (!of_dev) { 298 dev_err(dev, "of_find_device_by_node(%pOF) failed\n", 299 dev_node); 300 err = -EINVAL; 301 goto _return_dev_arr_put; 302 } 303 mac_dev->fman_port_devs[i] = &of_dev->dev; 304 305 mac_dev->port[i] = fman_port_bind(mac_dev->fman_port_devs[i]); 306 if (!mac_dev->port[i]) { 307 dev_err(dev, "dev_get_drvdata(%pOF) failed\n", 308 dev_node); 309 err = -EINVAL; 310 goto _return_dev_arr_put; 311 } 312 /* Two references have been taken in of_find_device_by_node() 313 * and fman_port_bind(). Release one of them here. The second 314 * one will be released in mac_remove(). 315 */ 316 put_device(mac_dev->fman_port_devs[i]); 317 of_node_put(dev_node); 318 dev_node = NULL; 319 } 320 321 /* Get the PHY connection type */ 322 err = of_get_phy_mode(mac_node, &phy_if); 323 if (err) { 324 dev_warn(dev, 325 "of_get_phy_mode() for %pOF failed. Defaulting to SGMII\n", 326 mac_node); 327 phy_if = PHY_INTERFACE_MODE_SGMII; 328 } 329 mac_dev->phy_if = phy_if; 330 331 params.mac_id = priv->cell_index; 332 params.fm = (void *)priv->fman; 333 params.exception_cb = mac_exception; 334 params.event_cb = mac_exception; 335 336 err = init(mac_dev, mac_node, ¶ms); 337 if (err < 0) 338 goto _return_dev_arr_put; 339 340 if (!is_zero_ether_addr(mac_dev->addr)) 341 dev_info(dev, "FMan MAC address: %pM\n", mac_dev->addr); 342 343 priv->eth_dev = dpaa_eth_add_device(fman_id, mac_dev); 344 if (IS_ERR(priv->eth_dev)) { 345 err = PTR_ERR(priv->eth_dev); 346 dev_err(dev, "failed to add Ethernet platform device for MAC %d\n", 347 priv->cell_index); 348 priv->eth_dev = NULL; 349 } 350 351 return err; 352 353 _return_dev_arr_put: 354 /* mac_dev is kzalloc'ed */ 355 for (i = 0; i < PORT_NUM; i++) 356 put_device(mac_dev->fman_port_devs[i]); 357 _return_dev_put: 358 put_device(mac_dev->fman_dev); 359 _return_of_node_put: 360 of_node_put(dev_node); 361 return err; 362 } 363 364 static void mac_remove(struct platform_device *pdev) 365 { 366 struct mac_device *mac_dev = platform_get_drvdata(pdev); 367 int i; 368 369 for (i = 0; i < PORT_NUM; i++) 370 put_device(mac_dev->fman_port_devs[i]); 371 put_device(mac_dev->fman_dev); 372 373 platform_device_unregister(mac_dev->priv->eth_dev); 374 } 375 376 static struct platform_driver mac_driver = { 377 .driver = { 378 .name = KBUILD_MODNAME, 379 .of_match_table = mac_match, 380 }, 381 .probe = mac_probe, 382 .remove_new = mac_remove, 383 }; 384 385 builtin_platform_driver(mac_driver); 386