drivers/net/ethernet/intel/igb/e1000_82575.c

   1 /* Intel(R) Gigabit Ethernet Linux driver
   2  * Copyright(c) 2007-2014 Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * The full GNU General Public License is included in this distribution in
  17  * the file called "COPYING".
  18  *
  19  * Contact Information:
  20  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  21  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  22  */
  23
  24 /* e1000_82575
  25  * e1000_82576
  26  */
  27
  28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29
  30 #include <linux/types.h>
  31 #include <linux/if_ether.h>
  32 #include <linux/i2c.h>
  33
  34 #include "e1000_mac.h"
  35 #include "e1000_82575.h"
  36 #include "e1000_i210.h"
  37
  38 static s32  igb_get_invariants_82575(struct e1000_hw *);
  39 static s32  igb_acquire_phy_82575(struct e1000_hw *);
  40 static void igb_release_phy_82575(struct e1000_hw *);
  41 static s32  igb_acquire_nvm_82575(struct e1000_hw *);
  42 static void igb_release_nvm_82575(struct e1000_hw *);
  43 static s32  igb_check_for_link_82575(struct e1000_hw *);
  44 static s32  igb_get_cfg_done_82575(struct e1000_hw *);
  45 static s32  igb_init_hw_82575(struct e1000_hw *);
  46 static s32  igb_phy_hw_reset_sgmii_82575(struct e1000_hw *);
  47 static s32  igb_read_phy_reg_sgmii_82575(struct e1000_hw *, u32, u16 *);
  48 static s32  igb_read_phy_reg_82580(struct e1000_hw *, u32, u16 *);
  49 static s32  igb_write_phy_reg_82580(struct e1000_hw *, u32, u16);
  50 static s32  igb_reset_hw_82575(struct e1000_hw *);
  51 static s32  igb_reset_hw_82580(struct e1000_hw *);
  52 static s32  igb_set_d0_lplu_state_82575(struct e1000_hw *, bool);
  53 static s32  igb_set_d0_lplu_state_82580(struct e1000_hw *, bool);
  54 static s32  igb_set_d3_lplu_state_82580(struct e1000_hw *, bool);
  55 static s32  igb_setup_copper_link_82575(struct e1000_hw *);
  56 static s32  igb_setup_serdes_link_82575(struct e1000_hw *);
  57 static s32  igb_write_phy_reg_sgmii_82575(struct e1000_hw *, u32, u16);
  58 static void igb_clear_hw_cntrs_82575(struct e1000_hw *);
  59 static s32  igb_acquire_swfw_sync_82575(struct e1000_hw *, u16);
  60 static s32  igb_get_pcs_speed_and_duplex_82575(struct e1000_hw *, u16 *,
  61                                                  u16 *);
  62 static s32  igb_get_phy_id_82575(struct e1000_hw *);
  63 static void igb_release_swfw_sync_82575(struct e1000_hw *, u16);
  64 static bool igb_sgmii_active_82575(struct e1000_hw *);
  65 static s32  igb_reset_init_script_82575(struct e1000_hw *);
  66 static s32  igb_read_mac_addr_82575(struct e1000_hw *);
  67 static s32  igb_set_pcie_completion_timeout(struct e1000_hw *hw);
  68 static s32  igb_reset_mdicnfg_82580(struct e1000_hw *hw);
  69 static s32  igb_validate_nvm_checksum_82580(struct e1000_hw *hw);
  70 static s32  igb_update_nvm_checksum_82580(struct e1000_hw *hw);
  71 static s32 igb_validate_nvm_checksum_i350(struct e1000_hw *hw);
  72 static s32 igb_update_nvm_checksum_i350(struct e1000_hw *hw);
  73 static const u16 e1000_82580_rxpbs_table[] = {
  74         36, 72, 144, 1, 2, 4, 8, 16, 35, 70, 140 };
  75
  76 /**
  77  *  igb_sgmii_uses_mdio_82575 - Determine if I2C pins are for external MDIO
  78  *  @hw: pointer to the HW structure
  79  *
  80  *  Called to determine if the I2C pins are being used for I2C or as an
  81  *  external MDIO interface since the two options are mutually exclusive.
  82  **/
  83 static bool igb_sgmii_uses_mdio_82575(struct e1000_hw *hw)
  84 {
  85         u32 reg = 0;
  86         bool ext_mdio = false;
  87
  88         switch (hw->mac.type) {
  89         case e1000_82575:
  90         case e1000_82576:
  91                 reg = rd32(E1000_MDIC);
  92                 ext_mdio = !!(reg & E1000_MDIC_DEST);
  93                 break;
  94         case e1000_82580:
  95         case e1000_i350:
  96         case e1000_i354:
  97         case e1000_i210:
  98         case e1000_i211:
  99                 reg = rd32(E1000_MDICNFG);
 100                 ext_mdio = !!(reg & E1000_MDICNFG_EXT_MDIO);
 101                 break;
 102         default:
 103                 break;
 104         }
 105         return ext_mdio;
 106 }
 107
 108 /**
 109  *  igb_check_for_link_media_swap - Check which M88E1112 interface linked
 110  *  @hw: pointer to the HW structure
 111  *
 112  *  Poll the M88E1112 interfaces to see which interface achieved link.
 113  */
 114 static s32 igb_check_for_link_media_swap(struct e1000_hw *hw)
 115 {
 116         struct e1000_phy_info *phy = &hw->phy;
 117         s32 ret_val;
 118         u16 data;
 119         u8 port = 0;
 120
 121         /* Check the copper medium. */
 122         ret_val = phy->ops.write_reg(hw, E1000_M88E1112_PAGE_ADDR, 0);
 123         if (ret_val)
 124                 return ret_val;
 125
 126         ret_val = phy->ops.read_reg(hw, E1000_M88E1112_STATUS, &data);
 127         if (ret_val)
 128                 return ret_val;
 129
 130         if (data & E1000_M88E1112_STATUS_LINK)
 131                 port = E1000_MEDIA_PORT_COPPER;
 132
 133         /* Check the other medium. */
 134         ret_val = phy->ops.write_reg(hw, E1000_M88E1112_PAGE_ADDR, 1);
 135         if (ret_val)
 136                 return ret_val;
 137
 138         ret_val = phy->ops.read_reg(hw, E1000_M88E1112_STATUS, &data);
 139         if (ret_val)
 140                 return ret_val;
 141
 142         /* reset page to 0 */
 143         ret_val = phy->ops.write_reg(hw, E1000_M88E1112_PAGE_ADDR, 0);
 144         if (ret_val)
 145                 return ret_val;
 146
 147         if (data & E1000_M88E1112_STATUS_LINK)
 148                 port = E1000_MEDIA_PORT_OTHER;
 149
 150         /* Determine if a swap needs to happen. */
 151         if (port && (hw->dev_spec._82575.media_port != port)) {
 152                 hw->dev_spec._82575.media_port = port;
 153                 hw->dev_spec._82575.media_changed = true;
 154         } else {
 155                 ret_val = igb_check_for_link_82575(hw);
 156         }
 157
 158         return 0;
 159 }
 160
 161 /**
 162  *  igb_init_phy_params_82575 - Init PHY func ptrs.
 163  *  @hw: pointer to the HW structure
 164  **/
 165 static s32 igb_init_phy_params_82575(struct e1000_hw *hw)
 166 {
 167         struct e1000_phy_info *phy = &hw->phy;
 168         s32 ret_val = 0;
 169         u32 ctrl_ext;
 170
 171         if (hw->phy.media_type != e1000_media_type_copper) {
 172                 phy->type = e1000_phy_none;
 173                 goto out;
 174         }
 175
 176         phy->autoneg_mask       = AUTONEG_ADVERTISE_SPEED_DEFAULT;
 177         phy->reset_delay_us     = 100;
 178
 179         ctrl_ext = rd32(E1000_CTRL_EXT);
 180
 181         if (igb_sgmii_active_82575(hw)) {
 182                 phy->ops.reset = igb_phy_hw_reset_sgmii_82575;
 183                 ctrl_ext |= E1000_CTRL_I2C_ENA;
 184         } else {
 185                 phy->ops.reset = igb_phy_hw_reset;
 186                 ctrl_ext &= ~E1000_CTRL_I2C_ENA;
 187         }
 188
 189         wr32(E1000_CTRL_EXT, ctrl_ext);
 190         igb_reset_mdicnfg_82580(hw);
 191
 192         if (igb_sgmii_active_82575(hw) && !igb_sgmii_uses_mdio_82575(hw)) {
 193                 phy->ops.read_reg = igb_read_phy_reg_sgmii_82575;
 194                 phy->ops.write_reg = igb_write_phy_reg_sgmii_82575;
 195         } else {
 196                 switch (hw->mac.type) {
 197                 case e1000_82580:
 198                 case e1000_i350:
 199                 case e1000_i354:
 200                         phy->ops.read_reg = igb_read_phy_reg_82580;
 201                         phy->ops.write_reg = igb_write_phy_reg_82580;
 202                         break;
 203                 case e1000_i210:
 204                 case e1000_i211:
 205                         phy->ops.read_reg = igb_read_phy_reg_gs40g;
 206                         phy->ops.write_reg = igb_write_phy_reg_gs40g;
 207                         break;
 208                 default:
 209                         phy->ops.read_reg = igb_read_phy_reg_igp;
 210                         phy->ops.write_reg = igb_write_phy_reg_igp;
 211                 }
 212         }
 213
 214         /* set lan id */
 215         hw->bus.func = (rd32(E1000_STATUS) & E1000_STATUS_FUNC_MASK) >>
 216                         E1000_STATUS_FUNC_SHIFT;
 217
 218         /* Set phy->phy_addr and phy->id. */
 219         ret_val = igb_get_phy_id_82575(hw);
 220         if (ret_val)
 221                 return ret_val;
 222
 223         /* Verify phy id and set remaining function pointers */
 224         switch (phy->id) {
 225         case M88E1543_E_PHY_ID:
 226         case I347AT4_E_PHY_ID:
 227         case M88E1112_E_PHY_ID:
 228         case M88E1111_I_PHY_ID:
 229                 phy->type               = e1000_phy_m88;
 230                 phy->ops.check_polarity = igb_check_polarity_m88;
 231                 phy->ops.get_phy_info   = igb_get_phy_info_m88;
 232                 if (phy->id != M88E1111_I_PHY_ID)
 233                         phy->ops.get_cable_length =
 234                                          igb_get_cable_length_m88_gen2;
 235                 else
 236                         phy->ops.get_cable_length = igb_get_cable_length_m88;
 237                 phy->ops.force_speed_duplex = igb_phy_force_speed_duplex_m88;
 238                 /* Check if this PHY is confgured for media swap. */
 239                 if (phy->id == M88E1112_E_PHY_ID) {
 240                         u16 data;
 241
 242                         ret_val = phy->ops.write_reg(hw,
 243                                                      E1000_M88E1112_PAGE_ADDR,
 244                                                      2);
 245                         if (ret_val)
 246                                 goto out;
 247
 248                         ret_val = phy->ops.read_reg(hw,
 249                                                     E1000_M88E1112_MAC_CTRL_1,
 250                                                     &data);
 251                         if (ret_val)
 252                                 goto out;
 253
 254                         data = (data & E1000_M88E1112_MAC_CTRL_1_MODE_MASK) >>
 255                                E1000_M88E1112_MAC_CTRL_1_MODE_SHIFT;
 256                         if (data == E1000_M88E1112_AUTO_COPPER_SGMII ||
 257                             data == E1000_M88E1112_AUTO_COPPER_BASEX)
 258                                 hw->mac.ops.check_for_link =
 259                                                 igb_check_for_link_media_swap;
 260                 }
 261                 break;
 262         case IGP03E1000_E_PHY_ID:
 263                 phy->type = e1000_phy_igp_3;
 264                 phy->ops.get_phy_info = igb_get_phy_info_igp;
 265                 phy->ops.get_cable_length = igb_get_cable_length_igp_2;
 266                 phy->ops.force_speed_duplex = igb_phy_force_speed_duplex_igp;
 267                 phy->ops.set_d0_lplu_state = igb_set_d0_lplu_state_82575;
 268                 phy->ops.set_d3_lplu_state = igb_set_d3_lplu_state;
 269                 break;
 270         case I82580_I_PHY_ID:
 271         case I350_I_PHY_ID:
 272                 phy->type = e1000_phy_82580;
 273                 phy->ops.force_speed_duplex =
 274                                          igb_phy_force_speed_duplex_82580;
 275                 phy->ops.get_cable_length = igb_get_cable_length_82580;
 276                 phy->ops.get_phy_info = igb_get_phy_info_82580;
 277                 phy->ops.set_d0_lplu_state = igb_set_d0_lplu_state_82580;
 278                 phy->ops.set_d3_lplu_state = igb_set_d3_lplu_state_82580;
 279                 break;
 280         case I210_I_PHY_ID:
 281                 phy->type               = e1000_phy_i210;
 282                 phy->ops.check_polarity = igb_check_polarity_m88;
 283                 phy->ops.get_phy_info   = igb_get_phy_info_m88;
 284                 phy->ops.get_cable_length = igb_get_cable_length_m88_gen2;
 285                 phy->ops.set_d0_lplu_state = igb_set_d0_lplu_state_82580;
 286                 phy->ops.set_d3_lplu_state = igb_set_d3_lplu_state_82580;
 287                 phy->ops.force_speed_duplex = igb_phy_force_speed_duplex_m88;
 288                 break;
 289         default:
 290                 ret_val = -E1000_ERR_PHY;
 291                 goto out;
 292         }
 293
 294 out:
 295         return ret_val;
 296 }
 297
 298 /**
 299  *  igb_init_nvm_params_82575 - Init NVM func ptrs.
 300  *  @hw: pointer to the HW structure
 301  **/
 302 static s32 igb_init_nvm_params_82575(struct e1000_hw *hw)
 303 {
 304         struct e1000_nvm_info *nvm = &hw->nvm;
 305         u32 eecd = rd32(E1000_EECD);
 306         u16 size;
 307
 308         size = (u16)((eecd & E1000_EECD_SIZE_EX_MASK) >>
 309                      E1000_EECD_SIZE_EX_SHIFT);
 310
 311         /* Added to a constant, "size" becomes the left-shift value
 312          * for setting word_size.
 313          */
 314         size += NVM_WORD_SIZE_BASE_SHIFT;
 315
 316         /* Just in case size is out of range, cap it to the largest
 317          * EEPROM size supported
 318          */
 319         if (size > 15)
 320                 size = 15;
 321
 322         nvm->word_size = 1 << size;
 323         nvm->opcode_bits = 8;
 324         nvm->delay_usec = 1;
 325
 326         switch (nvm->override) {
 327         case e1000_nvm_override_spi_large:
 328                 nvm->page_size = 32;
 329                 nvm->address_bits = 16;
 330                 break;
 331         case e1000_nvm_override_spi_small:
 332                 nvm->page_size = 8;
 333                 nvm->address_bits = 8;
 334                 break;
 335         default:
 336                 nvm->page_size = eecd & E1000_EECD_ADDR_BITS ? 32 : 8;
 337                 nvm->address_bits = eecd & E1000_EECD_ADDR_BITS ?
 338                                     16 : 8;
 339                 break;
 340         }
 341         if (nvm->word_size == (1 << 15))
 342                 nvm->page_size = 128;
 343
 344         nvm->type = e1000_nvm_eeprom_spi;
 345
 346         /* NVM Function Pointers */
 347         nvm->ops.acquire = igb_acquire_nvm_82575;
 348         nvm->ops.release = igb_release_nvm_82575;
 349         nvm->ops.write = igb_write_nvm_spi;
 350         nvm->ops.validate = igb_validate_nvm_checksum;
 351         nvm->ops.update = igb_update_nvm_checksum;
 352         if (nvm->word_size < (1 << 15))
 353                 nvm->ops.read = igb_read_nvm_eerd;
 354         else
 355                 nvm->ops.read = igb_read_nvm_spi;
 356
 357         /* override generic family function pointers for specific descendants */
 358         switch (hw->mac.type) {
 359         case e1000_82580:
 360                 nvm->ops.validate = igb_validate_nvm_checksum_82580;
 361                 nvm->ops.update = igb_update_nvm_checksum_82580;
 362                 break;
 363         case e1000_i354:
 364         case e1000_i350:
 365                 nvm->ops.validate = igb_validate_nvm_checksum_i350;
 366                 nvm->ops.update = igb_update_nvm_checksum_i350;
 367                 break;
 368         default:
 369                 break;
 370         }
 371
 372         return 0;
 373 }
 374
 375 /**
 376  *  igb_init_mac_params_82575 - Init MAC func ptrs.
 377  *  @hw: pointer to the HW structure
 378  **/
 379 static s32 igb_init_mac_params_82575(struct e1000_hw *hw)
 380 {
 381         struct e1000_mac_info *mac = &hw->mac;
 382         struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
 383
 384         /* Set mta register count */
 385         mac->mta_reg_count = 128;
 386         /* Set rar entry count */
 387         switch (mac->type) {
 388         case e1000_82576:
 389                 mac->rar_entry_count = E1000_RAR_ENTRIES_82576;
 390                 break;
 391         case e1000_82580:
 392                 mac->rar_entry_count = E1000_RAR_ENTRIES_82580;
 393                 break;
 394         case e1000_i350:
 395         case e1000_i354:
 396                 mac->rar_entry_count = E1000_RAR_ENTRIES_I350;
 397                 break;
 398         default:
 399                 mac->rar_entry_count = E1000_RAR_ENTRIES_82575;
 400                 break;
 401         }
 402         /* reset */
 403         if (mac->type >= e1000_82580)
 404                 mac->ops.reset_hw = igb_reset_hw_82580;
 405         else
 406                 mac->ops.reset_hw = igb_reset_hw_82575;
 407
 408         if (mac->type >= e1000_i210) {
 409                 mac->ops.acquire_swfw_sync = igb_acquire_swfw_sync_i210;
 410                 mac->ops.release_swfw_sync = igb_release_swfw_sync_i210;
 411
 412         } else {
 413                 mac->ops.acquire_swfw_sync = igb_acquire_swfw_sync_82575;
 414                 mac->ops.release_swfw_sync = igb_release_swfw_sync_82575;
 415         }
 416
 417         /* Set if part includes ASF firmware */
 418         mac->asf_firmware_present = true;
 419         /* Set if manageability features are enabled. */
 420         mac->arc_subsystem_valid =
 421                 (rd32(E1000_FWSM) & E1000_FWSM_MODE_MASK)
 422                         ? true : false;
 423         /* enable EEE on i350 parts and later parts */
 424         if (mac->type >= e1000_i350)
 425                 dev_spec->eee_disable = false;
 426         else
 427                 dev_spec->eee_disable = true;
 428         /* Allow a single clear of the SW semaphore on I210 and newer */
 429         if (mac->type >= e1000_i210)
 430                 dev_spec->clear_semaphore_once = true;
 431         /* physical interface link setup */
 432         mac->ops.setup_physical_interface =
 433                 (hw->phy.media_type == e1000_media_type_copper)
 434                         ? igb_setup_copper_link_82575
 435                         : igb_setup_serdes_link_82575;
 436
 437         if (mac->type == e1000_82580) {
 438                 switch (hw->device_id) {
 439                 /* feature not supported on these id's */
 440                 case E1000_DEV_ID_DH89XXCC_SGMII:
 441                 case E1000_DEV_ID_DH89XXCC_SERDES:
 442                 case E1000_DEV_ID_DH89XXCC_BACKPLANE:
 443                 case E1000_DEV_ID_DH89XXCC_SFP:
 444                         break;
 445                 default:
 446                         hw->dev_spec._82575.mas_capable = true;
 447                         break;
 448                 }
 449         }
 450         return 0;
 451 }
 452
 453 /**
 454  *  igb_set_sfp_media_type_82575 - derives SFP module media type.
 455  *  @hw: pointer to the HW structure
 456  *
 457  *  The media type is chosen based on SFP module.
 458  *  compatibility flags retrieved from SFP ID EEPROM.
 459  **/
 460 static s32 igb_set_sfp_media_type_82575(struct e1000_hw *hw)
 461 {
 462         s32 ret_val = E1000_ERR_CONFIG;
 463         u32 ctrl_ext = 0;
 464         struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
 465         struct e1000_sfp_flags *eth_flags = &dev_spec->eth_flags;
 466         u8 tranceiver_type = 0;
 467         s32 timeout = 3;
 468
 469         /* Turn I2C interface ON and power on sfp cage */
 470         ctrl_ext = rd32(E1000_CTRL_EXT);
 471         ctrl_ext &= ~E1000_CTRL_EXT_SDP3_DATA;
 472         wr32(E1000_CTRL_EXT, ctrl_ext | E1000_CTRL_I2C_ENA);
 473
 474         wrfl();
 475
 476         /* Read SFP module data */
 477         while (timeout) {
 478                 ret_val = igb_read_sfp_data_byte(hw,
 479                         E1000_I2CCMD_SFP_DATA_ADDR(E1000_SFF_IDENTIFIER_OFFSET),
 480                         &tranceiver_type);
 481                 if (ret_val == 0)
 482                         break;
 483                 msleep(100);
 484                 timeout--;
 485         }
 486         if (ret_val != 0)
 487                 goto out;
 488
 489         ret_val = igb_read_sfp_data_byte(hw,
 490                         E1000_I2CCMD_SFP_DATA_ADDR(E1000_SFF_ETH_FLAGS_OFFSET),
 491                         (u8 *)eth_flags);
 492         if (ret_val != 0)
 493                 goto out;
 494
 495         /* Check if there is some SFP module plugged and powered */
 496         if ((tranceiver_type == E1000_SFF_IDENTIFIER_SFP) ||
 497             (tranceiver_type == E1000_SFF_IDENTIFIER_SFF)) {
 498                 dev_spec->module_plugged = true;
 499                 if (eth_flags->e1000_base_lx || eth_flags->e1000_base_sx) {
 500                         hw->phy.media_type = e1000_media_type_internal_serdes;
 501                 } else if (eth_flags->e100_base_fx) {
 502                         dev_spec->sgmii_active = true;
 503                         hw->phy.media_type = e1000_media_type_internal_serdes;
 504                 } else if (eth_flags->e1000_base_t) {
 505                         dev_spec->sgmii_active = true;
 506                         hw->phy.media_type = e1000_media_type_copper;
 507                 } else {
 508                         hw->phy.media_type = e1000_media_type_unknown;
 509                         hw_dbg("PHY module has not been recognized\n");
 510                         goto out;
 511                 }
 512         } else {
 513                 hw->phy.media_type = e1000_media_type_unknown;
 514         }
 515         ret_val = 0;
 516 out:
 517         /* Restore I2C interface setting */
 518         wr32(E1000_CTRL_EXT, ctrl_ext);
 519         return ret_val;
 520 }
 521
 522 static s32 igb_get_invariants_82575(struct e1000_hw *hw)
 523 {
 524         struct e1000_mac_info *mac = &hw->mac;
 525         struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
 526         s32 ret_val;
 527         u32 ctrl_ext = 0;
 528         u32 link_mode = 0;
 529
 530         switch (hw->device_id) {
 531         case E1000_DEV_ID_82575EB_COPPER:
 532         case E1000_DEV_ID_82575EB_FIBER_SERDES:
 533         case E1000_DEV_ID_82575GB_QUAD_COPPER:
 534                 mac->type = e1000_82575;
 535                 break;
 536         case E1000_DEV_ID_82576:
 537         case E1000_DEV_ID_82576_NS:
 538         case E1000_DEV_ID_82576_NS_SERDES:
 539         case E1000_DEV_ID_82576_FIBER:
 540         case E1000_DEV_ID_82576_SERDES:
 541         case E1000_DEV_ID_82576_QUAD_COPPER:
 542         case E1000_DEV_ID_82576_QUAD_COPPER_ET2:
 543         case E1000_DEV_ID_82576_SERDES_QUAD:
 544                 mac->type = e1000_82576;
 545                 break;
 546         case E1000_DEV_ID_82580_COPPER:
 547         case E1000_DEV_ID_82580_FIBER:
 548         case E1000_DEV_ID_82580_QUAD_FIBER:
 549         case E1000_DEV_ID_82580_SERDES:
 550         case E1000_DEV_ID_82580_SGMII:
 551         case E1000_DEV_ID_82580_COPPER_DUAL:
 552         case E1000_DEV_ID_DH89XXCC_SGMII:
 553         case E1000_DEV_ID_DH89XXCC_SERDES:
 554         case E1000_DEV_ID_DH89XXCC_BACKPLANE:
 555         case E1000_DEV_ID_DH89XXCC_SFP:
 556                 mac->type = e1000_82580;
 557                 break;
 558         case E1000_DEV_ID_I350_COPPER:
 559         case E1000_DEV_ID_I350_FIBER:
 560         case E1000_DEV_ID_I350_SERDES:
 561         case E1000_DEV_ID_I350_SGMII:
 562                 mac->type = e1000_i350;
 563                 break;
 564         case E1000_DEV_ID_I210_COPPER:
 565         case E1000_DEV_ID_I210_FIBER:
 566         case E1000_DEV_ID_I210_SERDES:
 567         case E1000_DEV_ID_I210_SGMII:
 568         case E1000_DEV_ID_I210_COPPER_FLASHLESS:
 569         case E1000_DEV_ID_I210_SERDES_FLASHLESS:
 570                 mac->type = e1000_i210;
 571                 break;
 572         case E1000_DEV_ID_I211_COPPER:
 573                 mac->type = e1000_i211;
 574                 break;
 575         case E1000_DEV_ID_I354_BACKPLANE_1GBPS:
 576         case E1000_DEV_ID_I354_SGMII:
 577         case E1000_DEV_ID_I354_BACKPLANE_2_5GBPS:
 578                 mac->type = e1000_i354;
 579                 break;
 580         default:
 581                 return -E1000_ERR_MAC_INIT;
 582                 break;
 583         }
 584
 585         /* Set media type */
 586         /* The 82575 uses bits 22:23 for link mode. The mode can be changed
 587          * based on the EEPROM. We cannot rely upon device ID. There
 588          * is no distinguishable difference between fiber and internal
 589          * SerDes mode on the 82575. There can be an external PHY attached
 590          * on the SGMII interface. For this, we'll set sgmii_active to true.
 591          */
 592         hw->phy.media_type = e1000_media_type_copper;
 593         dev_spec->sgmii_active = false;
 594         dev_spec->module_plugged = false;
 595
 596         ctrl_ext = rd32(E1000_CTRL_EXT);
 597
 598         link_mode = ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK;
 599         switch (link_mode) {
 600         case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
 601                 hw->phy.media_type = e1000_media_type_internal_serdes;
 602                 break;
 603         case E1000_CTRL_EXT_LINK_MODE_SGMII:
 604                 /* Get phy control interface type set (MDIO vs. I2C)*/
 605                 if (igb_sgmii_uses_mdio_82575(hw)) {
 606                         hw->phy.media_type = e1000_media_type_copper;
 607                         dev_spec->sgmii_active = true;
 608                         break;
 609                 }
 610                 /* fall through for I2C based SGMII */
 611         case E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES:
 612                 /* read media type from SFP EEPROM */
 613                 ret_val = igb_set_sfp_media_type_82575(hw);
 614                 if ((ret_val != 0) ||
 615                     (hw->phy.media_type == e1000_media_type_unknown)) {
 616                         /* If media type was not identified then return media
 617                          * type defined by the CTRL_EXT settings.
 618                          */
 619                         hw->phy.media_type = e1000_media_type_internal_serdes;
 620
 621                         if (link_mode == E1000_CTRL_EXT_LINK_MODE_SGMII) {
 622                                 hw->phy.media_type = e1000_media_type_copper;
 623                                 dev_spec->sgmii_active = true;
 624                         }
 625
 626                         break;
 627                 }
 628
 629                 /* do not change link mode for 100BaseFX */
 630                 if (dev_spec->eth_flags.e100_base_fx)
 631                         break;
 632
 633                 /* change current link mode setting */
 634                 ctrl_ext &= ~E1000_CTRL_EXT_LINK_MODE_MASK;
 635
 636                 if (hw->phy.media_type == e1000_media_type_copper)
 637                         ctrl_ext |= E1000_CTRL_EXT_LINK_MODE_SGMII;
 638                 else
 639                         ctrl_ext |= E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES;
 640
 641                 wr32(E1000_CTRL_EXT, ctrl_ext);
 642
 643                 break;
 644         default:
 645                 break;
 646         }
 647
 648         /* mac initialization and operations */
 649         ret_val = igb_init_mac_params_82575(hw);
 650         if (ret_val)
 651                 goto out;
 652
 653         /* NVM initialization */
 654         ret_val = igb_init_nvm_params_82575(hw);
 655         switch (hw->mac.type) {
 656         case e1000_i210:
 657         case e1000_i211:
 658                 ret_val = igb_init_nvm_params_i210(hw);
 659                 break;
 660         default:
 661                 break;
 662         }
 663
 664         if (ret_val)
 665                 goto out;
 666
 667         /* if part supports SR-IOV then initialize mailbox parameters */
 668         switch (mac->type) {
 669         case e1000_82576:
 670         case e1000_i350:
 671                 igb_init_mbx_params_pf(hw);
 672                 break;
 673         default:
 674                 break;
 675         }
 676
 677         /* setup PHY parameters */
 678         ret_val = igb_init_phy_params_82575(hw);
 679
 680 out:
 681         return ret_val;
 682 }
 683
 684 /**
 685  *  igb_acquire_phy_82575 - Acquire rights to access PHY
 686  *  @hw: pointer to the HW structure
 687  *
 688  *  Acquire access rights to the correct PHY.  This is a
 689  *  function pointer entry point called by the api module.
 690  **/
 691 static s32 igb_acquire_phy_82575(struct e1000_hw *hw)
 692 {
 693         u16 mask = E1000_SWFW_PHY0_SM;
 694
 695         if (hw->bus.func == E1000_FUNC_1)
 696                 mask = E1000_SWFW_PHY1_SM;
 697         else if (hw->bus.func == E1000_FUNC_2)
 698                 mask = E1000_SWFW_PHY2_SM;
 699         else if (hw->bus.func == E1000_FUNC_3)
 700                 mask = E1000_SWFW_PHY3_SM;
 701
 702         return hw->mac.ops.acquire_swfw_sync(hw, mask);
 703 }
 704
 705 /**
 706  *  igb_release_phy_82575 - Release rights to access PHY
 707  *  @hw: pointer to the HW structure
 708  *
 709  *  A wrapper to release access rights to the correct PHY.  This is a
 710  *  function pointer entry point called by the api module.
 711  **/
 712 static void igb_release_phy_82575(struct e1000_hw *hw)
 713 {
 714         u16 mask = E1000_SWFW_PHY0_SM;
 715
 716         if (hw->bus.func == E1000_FUNC_1)
 717                 mask = E1000_SWFW_PHY1_SM;
 718         else if (hw->bus.func == E1000_FUNC_2)
 719                 mask = E1000_SWFW_PHY2_SM;
 720         else if (hw->bus.func == E1000_FUNC_3)
 721                 mask = E1000_SWFW_PHY3_SM;
 722
 723         hw->mac.ops.release_swfw_sync(hw, mask);
 724 }
 725
 726 /**
 727  *  igb_read_phy_reg_sgmii_82575 - Read PHY register using sgmii
 728  *  @hw: pointer to the HW structure
 729  *  @offset: register offset to be read
 730  *  @data: pointer to the read data
 731  *
 732  *  Reads the PHY register at offset using the serial gigabit media independent
 733  *  interface and stores the retrieved information in data.
 734  **/
 735 static s32 igb_read_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset,
 736                                           u16 *data)
 737 {
 738         s32 ret_val = -E1000_ERR_PARAM;
 739
 740         if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) {
 741                 hw_dbg("PHY Address %u is out of range\n", offset);
 742                 goto out;
 743         }
 744
 745         ret_val = hw->phy.ops.acquire(hw);
 746         if (ret_val)
 747                 goto out;
 748
 749         ret_val = igb_read_phy_reg_i2c(hw, offset, data);
 750
 751         hw->phy.ops.release(hw);
 752
 753 out:
 754         return ret_val;
 755 }
 756
 757 /**
 758  *  igb_write_phy_reg_sgmii_82575 - Write PHY register using sgmii
 759  *  @hw: pointer to the HW structure
 760  *  @offset: register offset to write to
 761  *  @data: data to write at register offset
 762  *
 763  *  Writes the data to PHY register at the offset using the serial gigabit
 764  *  media independent interface.
 765  **/
 766 static s32 igb_write_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset,
 767                                            u16 data)
 768 {
 769         s32 ret_val = -E1000_ERR_PARAM;
 770
 771
 772         if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) {
 773                 hw_dbg("PHY Address %d is out of range\n", offset);
 774                 goto out;
 775         }
 776
 777         ret_val = hw->phy.ops.acquire(hw);
 778         if (ret_val)
 779                 goto out;
 780
 781         ret_val = igb_write_phy_reg_i2c(hw, offset, data);
 782
 783         hw->phy.ops.release(hw);
 784
 785 out:
 786         return ret_val;
 787 }
 788
 789 /**
 790  *  igb_get_phy_id_82575 - Retrieve PHY addr and id
 791  *  @hw: pointer to the HW structure
 792  *
 793  *  Retrieves the PHY address and ID for both PHY's which do and do not use
 794  *  sgmi interface.
 795  **/
 796 static s32 igb_get_phy_id_82575(struct e1000_hw *hw)
 797 {
 798         struct e1000_phy_info *phy = &hw->phy;
 799         s32  ret_val = 0;
 800         u16 phy_id;
 801         u32 ctrl_ext;
 802         u32 mdic;
 803
 804         /* Extra read required for some PHY's on i354 */
 805         if (hw->mac.type == e1000_i354)
 806                 igb_get_phy_id(hw);
 807
 808         /* For SGMII PHYs, we try the list of possible addresses until
 809          * we find one that works.  For non-SGMII PHYs
 810          * (e.g. integrated copper PHYs), an address of 1 should
 811          * work.  The result of this function should mean phy->phy_addr
 812          * and phy->id are set correctly.
 813          */
 814         if (!(igb_sgmii_active_82575(hw))) {
 815                 phy->addr = 1;
 816                 ret_val = igb_get_phy_id(hw);
 817                 goto out;
 818         }
 819
 820         if (igb_sgmii_uses_mdio_82575(hw)) {
 821                 switch (hw->mac.type) {
 822                 case e1000_82575:
 823                 case e1000_82576:
 824                         mdic = rd32(E1000_MDIC);
 825                         mdic &= E1000_MDIC_PHY_MASK;
 826                         phy->addr = mdic >> E1000_MDIC_PHY_SHIFT;
 827                         break;
 828                 case e1000_82580:
 829                 case e1000_i350:
 830                 case e1000_i354:
 831                 case e1000_i210:
 832                 case e1000_i211:
 833                         mdic = rd32(E1000_MDICNFG);
 834                         mdic &= E1000_MDICNFG_PHY_MASK;
 835                         phy->addr = mdic >> E1000_MDICNFG_PHY_SHIFT;
 836                         break;
 837                 default:
 838                         ret_val = -E1000_ERR_PHY;
 839                         goto out;
 840                         break;
 841                 }
 842                 ret_val = igb_get_phy_id(hw);
 843                 goto out;
 844         }
 845
 846         /* Power on sgmii phy if it is disabled */
 847         ctrl_ext = rd32(E1000_CTRL_EXT);
 848         wr32(E1000_CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_SDP3_DATA);
 849         wrfl();
 850         msleep(300);
 851
 852         /* The address field in the I2CCMD register is 3 bits and 0 is invalid.
 853          * Therefore, we need to test 1-7
 854          */
 855         for (phy->addr = 1; phy->addr < 8; phy->addr++) {
 856                 ret_val = igb_read_phy_reg_sgmii_82575(hw, PHY_ID1, &phy_id);
 857                 if (ret_val == 0) {
 858                         hw_dbg("Vendor ID 0x%08X read at address %u\n",
 859                                phy_id, phy->addr);
 860                         /* At the time of this writing, The M88 part is
 861                          * the only supported SGMII PHY product.
 862                          */
 863                         if (phy_id == M88_VENDOR)
 864                                 break;
 865                 } else {
 866                         hw_dbg("PHY address %u was unreadable\n", phy->addr);
 867                 }
 868         }
 869
 870         /* A valid PHY type couldn't be found. */
 871         if (phy->addr == 8) {
 872                 phy->addr = 0;
 873                 ret_val = -E1000_ERR_PHY;
 874                 goto out;
 875         } else {
 876                 ret_val = igb_get_phy_id(hw);
 877         }
 878
 879         /* restore previous sfp cage power state */
 880         wr32(E1000_CTRL_EXT, ctrl_ext);
 881
 882 out:
 883         return ret_val;
 884 }
 885
 886 /**
 887  *  igb_phy_hw_reset_sgmii_82575 - Performs a PHY reset
 888  *  @hw: pointer to the HW structure
 889  *
 890  *  Resets the PHY using the serial gigabit media independent interface.
 891  **/
 892 static s32 igb_phy_hw_reset_sgmii_82575(struct e1000_hw *hw)
 893 {
 894         s32 ret_val;
 895
 896         /* This isn't a true "hard" reset, but is the only reset
 897          * available to us at this time.
 898          */
 899
 900         hw_dbg("Soft resetting SGMII attached PHY...\n");
 901
 902         /* SFP documentation requires the following to configure the SPF module
 903          * to work on SGMII.  No further documentation is given.
 904          */
 905         ret_val = hw->phy.ops.write_reg(hw, 0x1B, 0x8084);
 906         if (ret_val)
 907                 goto out;
 908
 909         ret_val = igb_phy_sw_reset(hw);
 910
 911 out:
 912         return ret_val;
 913 }
 914
 915 /**
 916  *  igb_set_d0_lplu_state_82575 - Set Low Power Linkup D0 state
 917  *  @hw: pointer to the HW structure
 918  *  @active: true to enable LPLU, false to disable
 919  *
 920  *  Sets the LPLU D0 state according to the active flag.  When
 921  *  activating LPLU this function also disables smart speed
 922  *  and vice versa.  LPLU will not be activated unless the
 923  *  device autonegotiation advertisement meets standards of
 924  *  either 10 or 10/100 or 10/100/1000 at all duplexes.
 925  *  This is a function pointer entry point only called by
 926  *  PHY setup routines.
 927  **/
 928 static s32 igb_set_d0_lplu_state_82575(struct e1000_hw *hw, bool active)
 929 {
 930         struct e1000_phy_info *phy = &hw->phy;
 931         s32 ret_val;
 932         u16 data;
 933
 934         ret_val = phy->ops.read_reg(hw, IGP02E1000_PHY_POWER_MGMT, &data);
 935         if (ret_val)
 936                 goto out;
 937
 938         if (active) {
 939                 data |= IGP02E1000_PM_D0_LPLU;
 940                 ret_val = phy->ops.write_reg(hw, IGP02E1000_PHY_POWER_MGMT,
 941                                                  data);
 942                 if (ret_val)
 943                         goto out;
 944
 945                 /* When LPLU is enabled, we should disable SmartSpeed */
 946                 ret_val = phy->ops.read_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
 947                                                 &data);
 948                 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
 949                 ret_val = phy->ops.write_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
 950                                                  data);
 951                 if (ret_val)
 952                         goto out;
 953         } else {
 954                 data &= ~IGP02E1000_PM_D0_LPLU;
 955                 ret_val = phy->ops.write_reg(hw, IGP02E1000_PHY_POWER_MGMT,
 956                                                  data);
 957                 /* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
 958                  * during Dx states where the power conservation is most
 959                  * important.  During driver activity we should enable
 960                  * SmartSpeed, so performance is maintained.
 961                  */
 962                 if (phy->smart_speed == e1000_smart_speed_on) {
 963                         ret_val = phy->ops.read_reg(hw,
 964                                         IGP01E1000_PHY_PORT_CONFIG, &data);
 965                         if (ret_val)
 966                                 goto out;
 967
 968                         data |= IGP01E1000_PSCFR_SMART_SPEED;
 969                         ret_val = phy->ops.write_reg(hw,
 970                                         IGP01E1000_PHY_PORT_CONFIG, data);
 971                         if (ret_val)
 972                                 goto out;
 973                 } else if (phy->smart_speed == e1000_smart_speed_off) {
 974                         ret_val = phy->ops.read_reg(hw,
 975                                         IGP01E1000_PHY_PORT_CONFIG, &data);
 976                         if (ret_val)
 977                                 goto out;
 978
 979                         data &= ~IGP01E1000_PSCFR_SMART_SPEED;
 980                         ret_val = phy->ops.write_reg(hw,
 981                                         IGP01E1000_PHY_PORT_CONFIG, data);
 982                         if (ret_val)
 983                                 goto out;
 984                 }
 985         }
 986
 987 out:
 988         return ret_val;
 989 }
 990
 991 /**
 992  *  igb_set_d0_lplu_state_82580 - Set Low Power Linkup D0 state
 993  *  @hw: pointer to the HW structure
 994  *  @active: true to enable LPLU, false to disable
 995  *
 996  *  Sets the LPLU D0 state according to the active flag.  When
 997  *  activating LPLU this function also disables smart speed
 998  *  and vice versa.  LPLU will not be activated unless the
 999  *  device autonegotiation advertisement meets standards of
1000  *  either 10 or 10/100 or 10/100/1000 at all duplexes.
1001  *  This is a function pointer entry point only called by
1002  *  PHY setup routines.
1003  **/
1004 static s32 igb_set_d0_lplu_state_82580(struct e1000_hw *hw, bool active)
1005 {
1006         struct e1000_phy_info *phy = &hw->phy;
1007         u16 data;
1008
1009         data = rd32(E1000_82580_PHY_POWER_MGMT);
1010
1011         if (active) {
1012                 data |= E1000_82580_PM_D0_LPLU;
1013
1014                 /* When LPLU is enabled, we should disable SmartSpeed */
1015                 data &= ~E1000_82580_PM_SPD;
1016         } else {
1017                 data &= ~E1000_82580_PM_D0_LPLU;
1018
1019                 /* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
1020                  * during Dx states where the power conservation is most
1021                  * important.  During driver activity we should enable
1022                  * SmartSpeed, so performance is maintained.
1023                  */
1024                 if (phy->smart_speed == e1000_smart_speed_on)
1025                         data |= E1000_82580_PM_SPD;
1026                 else if (phy->smart_speed == e1000_smart_speed_off)
1027                         data &= ~E1000_82580_PM_SPD; }
1028
1029         wr32(E1000_82580_PHY_POWER_MGMT, data);
1030         return 0;
1031 }
1032
1033 /**
1034  *  igb_set_d3_lplu_state_82580 - Sets low power link up state for D3
1035  *  @hw: pointer to the HW structure
1036  *  @active: boolean used to enable/disable lplu
1037  *
1038  *  Success returns 0, Failure returns 1
1039  *
1040  *  The low power link up (lplu) state is set to the power management level D3
1041  *  and SmartSpeed is disabled when active is true, else clear lplu for D3
1042  *  and enable Smartspeed.  LPLU and Smartspeed are mutually exclusive.  LPLU
1043  *  is used during Dx states where the power conservation is most important.
1044  *  During driver activity, SmartSpeed should be enabled so performance is
1045  *  maintained.
1046  **/
1047 static s32 igb_set_d3_lplu_state_82580(struct e1000_hw *hw, bool active)
1048 {
1049         struct e1000_phy_info *phy = &hw->phy;
1050         u16 data;
1051
1052         data = rd32(E1000_82580_PHY_POWER_MGMT);
1053
1054         if (!active) {
1055                 data &= ~E1000_82580_PM_D3_LPLU;
1056                 /* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
1057                  * during Dx states where the power conservation is most
1058                  * important.  During driver activity we should enable
1059                  * SmartSpeed, so performance is maintained.
1060                  */
1061                 if (phy->smart_speed == e1000_smart_speed_on)
1062                         data |= E1000_82580_PM_SPD;
1063                 else if (phy->smart_speed == e1000_smart_speed_off)
1064                         data &= ~E1000_82580_PM_SPD;
1065         } else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) ||
1066                    (phy->autoneg_advertised == E1000_ALL_NOT_GIG) ||
1067                    (phy->autoneg_advertised == E1000_ALL_10_SPEED)) {
1068                 data |= E1000_82580_PM_D3_LPLU;
1069                 /* When LPLU is enabled, we should disable SmartSpeed */
1070                 data &= ~E1000_82580_PM_SPD;
1071         }
1072
1073         wr32(E1000_82580_PHY_POWER_MGMT, data);
1074         return 0;
1075 }
1076
1077 /**
1078  *  igb_acquire_nvm_82575 - Request for access to EEPROM
1079  *  @hw: pointer to the HW structure
1080  *
1081  *  Acquire the necessary semaphores for exclusive access to the EEPROM.
1082  *  Set the EEPROM access request bit and wait for EEPROM access grant bit.
1083  *  Return successful if access grant bit set, else clear the request for
1084  *  EEPROM access and return -E1000_ERR_NVM (-1).
1085  **/
1086 static s32 igb_acquire_nvm_82575(struct e1000_hw *hw)
1087 {
1088         s32 ret_val;
1089
1090         ret_val = hw->mac.ops.acquire_swfw_sync(hw, E1000_SWFW_EEP_SM);
1091         if (ret_val)
1092                 goto out;
1093
1094         ret_val = igb_acquire_nvm(hw);
1095
1096         if (ret_val)
1097                 hw->mac.ops.release_swfw_sync(hw, E1000_SWFW_EEP_SM);
1098
1099 out:
1100         return ret_val;
1101 }
1102
1103 /**
1104  *  igb_release_nvm_82575 - Release exclusive access to EEPROM
1105  *  @hw: pointer to the HW structure
1106  *
1107  *  Stop any current commands to the EEPROM and clear the EEPROM request bit,
1108  *  then release the semaphores acquired.
1109  **/
1110 static void igb_release_nvm_82575(struct e1000_hw *hw)
1111 {
1112         igb_release_nvm(hw);
1113         hw->mac.ops.release_swfw_sync(hw, E1000_SWFW_EEP_SM);
1114 }
1115
1116 /**
1117  *  igb_acquire_swfw_sync_82575 - Acquire SW/FW semaphore
1118  *  @hw: pointer to the HW structure
1119  *  @mask: specifies which semaphore to acquire
1120  *
1121  *  Acquire the SW/FW semaphore to access the PHY or NVM.  The mask
1122  *  will also specify which port we're acquiring the lock for.
1123  **/
1124 static s32 igb_acquire_swfw_sync_82575(struct e1000_hw *hw, u16 mask)
1125 {
1126         u32 swfw_sync;
1127         u32 swmask = mask;
1128         u32 fwmask = mask << 16;
1129         s32 ret_val = 0;
1130         s32 i = 0, timeout = 200; /* FIXME: find real value to use here */
1131
1132         while (i < timeout) {
1133                 if (igb_get_hw_semaphore(hw)) {
1134                         ret_val = -E1000_ERR_SWFW_SYNC;
1135                         goto out;
1136                 }
1137
1138                 swfw_sync = rd32(E1000_SW_FW_SYNC);
1139                 if (!(swfw_sync & (fwmask | swmask)))
1140                         break;
1141
1142                 /* Firmware currently using resource (fwmask)
1143                  * or other software thread using resource (swmask)
1144                  */
1145                 igb_put_hw_semaphore(hw);
1146                 mdelay(5);
1147                 i++;
1148         }
1149
1150         if (i == timeout) {
1151                 hw_dbg("Driver can't access resource, SW_FW_SYNC timeout.\n");
1152                 ret_val = -E1000_ERR_SWFW_SYNC;
1153                 goto out;
1154         }
1155
1156         swfw_sync |= swmask;
1157         wr32(E1000_SW_FW_SYNC, swfw_sync);
1158
1159         igb_put_hw_semaphore(hw);
1160
1161 out:
1162         return ret_val;
1163 }
1164
1165 /**
1166  *  igb_release_swfw_sync_82575 - Release SW/FW semaphore
1167  *  @hw: pointer to the HW structure
1168  *  @mask: specifies which semaphore to acquire
1169  *
1170  *  Release the SW/FW semaphore used to access the PHY or NVM.  The mask
1171  *  will also specify which port we're releasing the lock for.
1172  **/
1173 static void igb_release_swfw_sync_82575(struct e1000_hw *hw, u16 mask)
1174 {
1175         u32 swfw_sync;
1176
1177         while (igb_get_hw_semaphore(hw) != 0)
1178                 ; /* Empty */
1179
1180         swfw_sync = rd32(E1000_SW_FW_SYNC);
1181         swfw_sync &= ~mask;
1182         wr32(E1000_SW_FW_SYNC, swfw_sync);
1183
1184         igb_put_hw_semaphore(hw);
1185 }
1186
1187 /**
1188  *  igb_get_cfg_done_82575 - Read config done bit
1189  *  @hw: pointer to the HW structure
1190  *
1191  *  Read the management control register for the config done bit for
1192  *  completion status.  NOTE: silicon which is EEPROM-less will fail trying
1193  *  to read the config done bit, so an error is *ONLY* logged and returns
1194  *  0.  If we were to return with error, EEPROM-less silicon
1195  *  would not be able to be reset or change link.
1196  **/
1197 static s32 igb_get_cfg_done_82575(struct e1000_hw *hw)
1198 {
1199         s32 timeout = PHY_CFG_TIMEOUT;
1200         u32 mask = E1000_NVM_CFG_DONE_PORT_0;
1201
1202         if (hw->bus.func == 1)
1203                 mask = E1000_NVM_CFG_DONE_PORT_1;
1204         else if (hw->bus.func == E1000_FUNC_2)
1205                 mask = E1000_NVM_CFG_DONE_PORT_2;
1206         else if (hw->bus.func == E1000_FUNC_3)
1207                 mask = E1000_NVM_CFG_DONE_PORT_3;
1208
1209         while (timeout) {
1210                 if (rd32(E1000_EEMNGCTL) & mask)
1211                         break;
1212                 usleep_range(1000, 2000);
1213                 timeout--;
1214         }
1215         if (!timeout)
1216                 hw_dbg("MNG configuration cycle has not completed.\n");
1217
1218         /* If EEPROM is not marked present, init the PHY manually */
1219         if (((rd32(E1000_EECD) & E1000_EECD_PRES) == 0) &&
1220             (hw->phy.type == e1000_phy_igp_3))
1221                 igb_phy_init_script_igp3(hw);
1222
1223         return 0;
1224 }
1225
1226 /**
1227  *  igb_get_link_up_info_82575 - Get link speed/duplex info
1228  *  @hw: pointer to the HW structure
1229  *  @speed: stores the current speed
1230  *  @duplex: stores the current duplex
1231  *
1232  *  This is a wrapper function, if using the serial gigabit media independent
1233  *  interface, use PCS to retrieve the link speed and duplex information.
1234  *  Otherwise, use the generic function to get the link speed and duplex info.
1235  **/
1236 static s32 igb_get_link_up_info_82575(struct e1000_hw *hw, u16 *speed,
1237                                         u16 *duplex)
1238 {
1239         s32 ret_val;
1240
1241         if (hw->phy.media_type != e1000_media_type_copper)
1242                 ret_val = igb_get_pcs_speed_and_duplex_82575(hw, speed,
1243                                                                duplex);
1244         else
1245                 ret_val = igb_get_speed_and_duplex_copper(hw, speed,
1246                                                                     duplex);
1247
1248         return ret_val;
1249 }
1250
1251 /**
1252  *  igb_check_for_link_82575 - Check for link
1253  *  @hw: pointer to the HW structure
1254  *
1255  *  If sgmii is enabled, then use the pcs register to determine link, otherwise
1256  *  use the generic interface for determining link.
1257  **/
1258 static s32 igb_check_for_link_82575(struct e1000_hw *hw)
1259 {
1260         s32 ret_val;
1261         u16 speed, duplex;
1262
1263         if (hw->phy.media_type != e1000_media_type_copper) {
1264                 ret_val = igb_get_pcs_speed_and_duplex_82575(hw, &speed,
1265                                                              &duplex);
1266                 /* Use this flag to determine if link needs to be checked or
1267                  * not.  If  we have link clear the flag so that we do not
1268                  * continue to check for link.
1269                  */
1270                 hw->mac.get_link_status = !hw->mac.serdes_has_link;
1271
1272                 /* Configure Flow Control now that Auto-Neg has completed.
1273                  * First, we need to restore the desired flow control
1274                  * settings because we may have had to re-autoneg with a
1275                  * different link partner.
1276                  */
1277                 ret_val = igb_config_fc_after_link_up(hw);
1278                 if (ret_val)
1279                         hw_dbg("Error configuring flow control\n");
1280         } else {
1281                 ret_val = igb_check_for_copper_link(hw);
1282         }
1283
1284         return ret_val;
1285 }
1286
1287 /**
1288  *  igb_power_up_serdes_link_82575 - Power up the serdes link after shutdown
1289  *  @hw: pointer to the HW structure
1290  **/
1291 void igb_power_up_serdes_link_82575(struct e1000_hw *hw)
1292 {
1293         u32 reg;
1294
1295
1296         if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
1297             !igb_sgmii_active_82575(hw))
1298                 return;
1299
1300         /* Enable PCS to turn on link */
1301         reg = rd32(E1000_PCS_CFG0);
1302         reg |= E1000_PCS_CFG_PCS_EN;
1303         wr32(E1000_PCS_CFG0, reg);
1304
1305         /* Power up the laser */
1306         reg = rd32(E1000_CTRL_EXT);
1307         reg &= ~E1000_CTRL_EXT_SDP3_DATA;
1308         wr32(E1000_CTRL_EXT, reg);
1309
1310         /* flush the write to verify completion */
1311         wrfl();
1312         usleep_range(1000, 2000);
1313 }
1314
1315 /**
1316  *  igb_get_pcs_speed_and_duplex_82575 - Retrieve current speed/duplex
1317  *  @hw: pointer to the HW structure
1318  *  @speed: stores the current speed
1319  *  @duplex: stores the current duplex
1320  *
1321  *  Using the physical coding sub-layer (PCS), retrieve the current speed and
1322  *  duplex, then store the values in the pointers provided.
1323  **/
1324 static s32 igb_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw, u16 *speed,
1325                                                 u16 *duplex)
1326 {
1327         struct e1000_mac_info *mac = &hw->mac;
1328         u32 pcs, status;
1329
1330         /* Set up defaults for the return values of this function */
1331         mac->serdes_has_link = false;
1332         *speed = 0;
1333         *duplex = 0;
1334
1335         /* Read the PCS Status register for link state. For non-copper mode,
1336          * the status register is not accurate. The PCS status register is
1337          * used instead.
1338          */
1339         pcs = rd32(E1000_PCS_LSTAT);
1340
1341         /* The link up bit determines when link is up on autoneg. The sync ok
1342          * gets set once both sides sync up and agree upon link. Stable link
1343          * can be determined by checking for both link up and link sync ok
1344          */
1345         if ((pcs & E1000_PCS_LSTS_LINK_OK) && (pcs & E1000_PCS_LSTS_SYNK_OK)) {
1346                 mac->serdes_has_link = true;
1347
1348                 /* Detect and store PCS speed */
1349                 if (pcs & E1000_PCS_LSTS_SPEED_1000)
1350                         *speed = SPEED_1000;
1351                 else if (pcs & E1000_PCS_LSTS_SPEED_100)
1352                         *speed = SPEED_100;
1353                 else
1354                         *speed = SPEED_10;
1355
1356                 /* Detect and store PCS duplex */
1357                 if (pcs & E1000_PCS_LSTS_DUPLEX_FULL)
1358                         *duplex = FULL_DUPLEX;
1359                 else
1360                         *duplex = HALF_DUPLEX;
1361
1362         /* Check if it is an I354 2.5Gb backplane connection. */
1363                 if (mac->type == e1000_i354) {
1364                         status = rd32(E1000_STATUS);
1365                         if ((status & E1000_STATUS_2P5_SKU) &&
1366                             !(status & E1000_STATUS_2P5_SKU_OVER)) {
1367                                 *speed = SPEED_2500;
1368                                 *duplex = FULL_DUPLEX;
1369                                 hw_dbg("2500 Mbs, ");
1370                                 hw_dbg("Full Duplex\n");
1371                         }
1372                 }
1373
1374         }
1375
1376         return 0;
1377 }
1378
1379 /**
1380  *  igb_shutdown_serdes_link_82575 - Remove link during power down
1381  *  @hw: pointer to the HW structure
1382  *
1383  *  In the case of fiber serdes, shut down optics and PCS on driver unload
1384  *  when management pass thru is not enabled.
1385  **/
1386 void igb_shutdown_serdes_link_82575(struct e1000_hw *hw)
1387 {
1388         u32 reg;
1389
1390         if (hw->phy.media_type != e1000_media_type_internal_serdes &&
1391             igb_sgmii_active_82575(hw))
1392                 return;
1393
1394         if (!igb_enable_mng_pass_thru(hw)) {
1395                 /* Disable PCS to turn off link */
1396                 reg = rd32(E1000_PCS_CFG0);
1397                 reg &= ~E1000_PCS_CFG_PCS_EN;
1398                 wr32(E1000_PCS_CFG0, reg);
1399
1400                 /* shutdown the laser */
1401                 reg = rd32(E1000_CTRL_EXT);
1402                 reg |= E1000_CTRL_EXT_SDP3_DATA;
1403                 wr32(E1000_CTRL_EXT, reg);
1404
1405                 /* flush the write to verify completion */
1406                 wrfl();
1407                 usleep_range(1000, 2000);
1408         }
1409 }
1410
1411 /**
1412  *  igb_reset_hw_82575 - Reset hardware
1413  *  @hw: pointer to the HW structure
1414  *
1415  *  This resets the hardware into a known state.  This is a
1416  *  function pointer entry point called by the api module.
1417  **/
1418 static s32 igb_reset_hw_82575(struct e1000_hw *hw)
1419 {
1420         u32 ctrl;
1421         s32 ret_val;
1422
1423         /* Prevent the PCI-E bus from sticking if there is no TLP connection
1424          * on the last TLP read/write transaction when MAC is reset.
1425          */
1426         ret_val = igb_disable_pcie_master(hw);
1427         if (ret_val)
1428                 hw_dbg("PCI-E Master disable polling has failed.\n");
1429
1430         /* set the completion timeout for interface */
1431         ret_val = igb_set_pcie_completion_timeout(hw);
1432         if (ret_val)
1433                 hw_dbg("PCI-E Set completion timeout has failed.\n");
1434
1435         hw_dbg("Masking off all interrupts\n");
1436         wr32(E1000_IMC, 0xffffffff);
1437
1438         wr32(E1000_RCTL, 0);
1439         wr32(E1000_TCTL, E1000_TCTL_PSP);
1440         wrfl();
1441
1442         usleep_range(10000, 20000);
1443
1444         ctrl = rd32(E1000_CTRL);
1445
1446         hw_dbg("Issuing a global reset to MAC\n");
1447         wr32(E1000_CTRL, ctrl | E1000_CTRL_RST);
1448
1449         ret_val = igb_get_auto_rd_done(hw);
1450         if (ret_val) {
1451                 /* When auto config read does not complete, do not
1452                  * return with an error. This can happen in situations
1453                  * where there is no eeprom and prevents getting link.
1454                  */
1455                 hw_dbg("Auto Read Done did not complete\n");
1456         }
1457
1458         /* If EEPROM is not present, run manual init scripts */
1459         if ((rd32(E1000_EECD) & E1000_EECD_PRES) == 0)
1460                 igb_reset_init_script_82575(hw);
1461
1462         /* Clear any pending interrupt events. */
1463         wr32(E1000_IMC, 0xffffffff);
1464         rd32(E1000_ICR);
1465
1466         /* Install any alternate MAC address into RAR0 */
1467         ret_val = igb_check_alt_mac_addr(hw);
1468
1469         return ret_val;
1470 }
1471
1472 /**
1473  *  igb_init_hw_82575 - Initialize hardware
1474  *  @hw: pointer to the HW structure
1475  *
1476  *  This inits the hardware readying it for operation.
1477  **/
1478 static s32 igb_init_hw_82575(struct e1000_hw *hw)
1479 {
1480         struct e1000_mac_info *mac = &hw->mac;
1481         s32 ret_val;
1482         u16 i, rar_count = mac->rar_entry_count;
1483
1484         if ((hw->mac.type >= e1000_i210) &&
1485             !(igb_get_flash_presence_i210(hw))) {
1486                 ret_val = igb_pll_workaround_i210(hw);
1487                 if (ret_val)
1488                         return ret_val;
1489         }
1490
1491         /* Initialize identification LED */
1492         ret_val = igb_id_led_init(hw);
1493         if (ret_val) {
1494                 hw_dbg("Error initializing identification LED\n");
1495                 /* This is not fatal and we should not stop init due to this */
1496         }
1497
1498         /* Disabling VLAN filtering */
1499         hw_dbg("Initializing the IEEE VLAN\n");
1500         if ((hw->mac.type == e1000_i350) || (hw->mac.type == e1000_i354))
1501                 igb_clear_vfta_i350(hw);
1502         else
1503                 igb_clear_vfta(hw);
1504
1505         /* Setup the receive address */
1506         igb_init_rx_addrs(hw, rar_count);
1507
1508         /* Zero out the Multicast HASH table */
1509         hw_dbg("Zeroing the MTA\n");
1510         for (i = 0; i < mac->mta_reg_count; i++)
1511                 array_wr32(E1000_MTA, i, 0);
1512
1513         /* Zero out the Unicast HASH table */
1514         hw_dbg("Zeroing the UTA\n");
1515         for (i = 0; i < mac->uta_reg_count; i++)
1516                 array_wr32(E1000_UTA, i, 0);
1517
1518         /* Setup link and flow control */
1519         ret_val = igb_setup_link(hw);
1520
1521         /* Clear all of the statistics registers (clear on read).  It is
1522          * important that we do this after we have tried to establish link
1523          * because the symbol error count will increment wildly if there
1524          * is no link.
1525          */
1526         igb_clear_hw_cntrs_82575(hw);
1527         return ret_val;
1528 }
1529
1530 /**
1531  *  igb_setup_copper_link_82575 - Configure copper link settings
1532  *  @hw: pointer to the HW structure
1533  *
1534  *  Configures the link for auto-neg or forced speed and duplex.  Then we check
1535  *  for link, once link is established calls to configure collision distance
1536  *  and flow control are called.
1537  **/
1538 static s32 igb_setup_copper_link_82575(struct e1000_hw *hw)
1539 {
1540         u32 ctrl;
1541         s32  ret_val;
1542         u32 phpm_reg;
1543
1544         ctrl = rd32(E1000_CTRL);
1545         ctrl |= E1000_CTRL_SLU;
1546         ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
1547         wr32(E1000_CTRL, ctrl);
1548
1549         /* Clear Go Link Disconnect bit on supported devices */
1550         switch (hw->mac.type) {
1551         case e1000_82580:
1552         case e1000_i350:
1553         case e1000_i210:
1554         case e1000_i211:
1555                 phpm_reg = rd32(E1000_82580_PHY_POWER_MGMT);
1556                 phpm_reg &= ~E1000_82580_PM_GO_LINKD;
1557                 wr32(E1000_82580_PHY_POWER_MGMT, phpm_reg);
1558                 break;
1559         default:
1560                 break;
1561         }
1562
1563         ret_val = igb_setup_serdes_link_82575(hw);
1564         if (ret_val)
1565                 goto out;
1566
1567         if (igb_sgmii_active_82575(hw) && !hw->phy.reset_disable) {
1568                 /* allow time for SFP cage time to power up phy */
1569                 msleep(300);
1570
1571                 ret_val = hw->phy.ops.reset(hw);
1572                 if (ret_val) {
1573                         hw_dbg("Error resetting the PHY.\n");
1574                         goto out;
1575                 }
1576         }
1577         switch (hw->phy.type) {
1578         case e1000_phy_i210:
1579         case e1000_phy_m88:
1580                 switch (hw->phy.id) {
1581                 case I347AT4_E_PHY_ID:
1582                 case M88E1112_E_PHY_ID:
1583                 case M88E1543_E_PHY_ID:
1584                 case I210_I_PHY_ID:
1585                         ret_val = igb_copper_link_setup_m88_gen2(hw);
1586                         break;
1587                 default:
1588                         ret_val = igb_copper_link_setup_m88(hw);
1589                         break;
1590                 }
1591                 break;
1592         case e1000_phy_igp_3:
1593                 ret_val = igb_copper_link_setup_igp(hw);
1594                 break;
1595         case e1000_phy_82580:
1596                 ret_val = igb_copper_link_setup_82580(hw);
1597                 break;
1598         default:
1599                 ret_val = -E1000_ERR_PHY;
1600                 break;
1601         }
1602
1603         if (ret_val)
1604                 goto out;
1605
1606         ret_val = igb_setup_copper_link(hw);
1607 out:
1608         return ret_val;
1609 }
1610
1611 /**
1612  *  igb_setup_serdes_link_82575 - Setup link for serdes
1613  *  @hw: pointer to the HW structure
1614  *
1615  *  Configure the physical coding sub-layer (PCS) link.  The PCS link is
1616  *  used on copper connections where the serialized gigabit media independent
1617  *  interface (sgmii), or serdes fiber is being used.  Configures the link
1618  *  for auto-negotiation or forces speed/duplex.
1619  **/
1620 static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
1621 {
1622         u32 ctrl_ext, ctrl_reg, reg, anadv_reg;
1623         bool pcs_autoneg;
1624         s32 ret_val = 0;
1625         u16 data;
1626
1627         if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
1628             !igb_sgmii_active_82575(hw))
1629                 return ret_val;
1630
1631
1632         /* On the 82575, SerDes loopback mode persists until it is
1633          * explicitly turned off or a power cycle is performed.  A read to
1634          * the register does not indicate its status.  Therefore, we ensure
1635          * loopback mode is disabled during initialization.
1636          */
1637         wr32(E1000_SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);
1638
1639         /* power on the sfp cage if present and turn on I2C */
1640         ctrl_ext = rd32(E1000_CTRL_EXT);
1641         ctrl_ext &= ~E1000_CTRL_EXT_SDP3_DATA;
1642         ctrl_ext |= E1000_CTRL_I2C_ENA;
1643         wr32(E1000_CTRL_EXT, ctrl_ext);
1644
1645         ctrl_reg = rd32(E1000_CTRL);
1646         ctrl_reg |= E1000_CTRL_SLU;
1647
1648         if (hw->mac.type == e1000_82575 || hw->mac.type == e1000_82576) {
1649                 /* set both sw defined pins */
1650                 ctrl_reg |= E1000_CTRL_SWDPIN0 | E1000_CTRL_SWDPIN1;
1651
1652                 /* Set switch control to serdes energy detect */
1653                 reg = rd32(E1000_CONNSW);
1654                 reg |= E1000_CONNSW_ENRGSRC;
1655                 wr32(E1000_CONNSW, reg);
1656         }
1657
1658         reg = rd32(E1000_PCS_LCTL);
1659
1660         /* default pcs_autoneg to the same setting as mac autoneg */
1661         pcs_autoneg = hw->mac.autoneg;
1662
1663         switch (ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK) {
1664         case E1000_CTRL_EXT_LINK_MODE_SGMII:
1665                 /* sgmii mode lets the phy handle forcing speed/duplex */
1666                 pcs_autoneg = true;
1667                 /* autoneg time out should be disabled for SGMII mode */
1668                 reg &= ~(E1000_PCS_LCTL_AN_TIMEOUT);
1669                 break;
1670         case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
1671                 /* disable PCS autoneg and support parallel detect only */
1672                 pcs_autoneg = false;
1673         default:
1674                 if (hw->mac.type == e1000_82575 ||
1675                     hw->mac.type == e1000_82576) {
1676                         ret_val = hw->nvm.ops.read(hw, NVM_COMPAT, 1, &data);
1677                         if (ret_val) {
1678                                 hw_dbg(KERN_DEBUG "NVM Read Error\n\n");
1679                                 return ret_val;
1680                         }
1681
1682                         if (data & E1000_EEPROM_PCS_AUTONEG_DISABLE_BIT)
1683                                 pcs_autoneg = false;
1684                 }
1685
1686                 /* non-SGMII modes only supports a speed of 1000/Full for the
1687                  * link so it is best to just force the MAC and let the pcs
1688                  * link either autoneg or be forced to 1000/Full
1689                  */
1690                 ctrl_reg |= E1000_CTRL_SPD_1000 | E1000_CTRL_FRCSPD |
1691                                 E1000_CTRL_FD | E1000_CTRL_FRCDPX;
1692
1693                 /* set speed of 1000/Full if speed/duplex is forced */
1694                 reg |= E1000_PCS_LCTL_FSV_1000 | E1000_PCS_LCTL_FDV_FULL;
1695                 break;
1696         }
1697
1698         wr32(E1000_CTRL, ctrl_reg);
1699
1700         /* New SerDes mode allows for forcing speed or autonegotiating speed
1701          * at 1gb. Autoneg should be default set by most drivers. This is the
1702          * mode that will be compatible with older link partners and switches.
1703          * However, both are supported by the hardware and some drivers/tools.
1704          */
1705         reg &= ~(E1000_PCS_LCTL_AN_ENABLE | E1000_PCS_LCTL_FLV_LINK_UP |
1706                 E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK);
1707
1708         if (pcs_autoneg) {
1709                 /* Set PCS register for autoneg */
1710                 reg |= E1000_PCS_LCTL_AN_ENABLE | /* Enable Autoneg */
1711                        E1000_PCS_LCTL_AN_RESTART; /* Restart autoneg */
1712
1713                 /* Disable force flow control for autoneg */
1714                 reg &= ~E1000_PCS_LCTL_FORCE_FCTRL;
1715
1716                 /* Configure flow control advertisement for autoneg */
1717                 anadv_reg = rd32(E1000_PCS_ANADV);
1718                 anadv_reg &= ~(E1000_TXCW_ASM_DIR | E1000_TXCW_PAUSE);
1719                 switch (hw->fc.requested_mode) {
1720                 case e1000_fc_full:
1721                 case e1000_fc_rx_pause:
1722                         anadv_reg |= E1000_TXCW_ASM_DIR;
1723                         anadv_reg |= E1000_TXCW_PAUSE;
1724                         break;
1725                 case e1000_fc_tx_pause:
1726                         anadv_reg |= E1000_TXCW_ASM_DIR;
1727                         break;
1728                 default:
1729                         break;
1730                 }
1731                 wr32(E1000_PCS_ANADV, anadv_reg);
1732
1733                 hw_dbg("Configuring Autoneg:PCS_LCTL=0x%08X\n", reg);
1734         } else {
1735                 /* Set PCS register for forced link */
1736                 reg |= E1000_PCS_LCTL_FSD;        /* Force Speed */
1737
1738                 /* Force flow control for forced link */
1739                 reg |= E1000_PCS_LCTL_FORCE_FCTRL;
1740
1741                 hw_dbg("Configuring Forced Link:PCS_LCTL=0x%08X\n", reg);
1742         }
1743
1744         wr32(E1000_PCS_LCTL, reg);
1745
1746         if (!pcs_autoneg && !igb_sgmii_active_82575(hw))
1747                 igb_force_mac_fc(hw);
1748
1749         return ret_val;
1750 }
1751
1752 /**
1753  *  igb_sgmii_active_82575 - Return sgmii state
1754  *  @hw: pointer to the HW structure
1755  *
1756  *  82575 silicon has a serialized gigabit media independent interface (sgmii)
1757  *  which can be enabled for use in the embedded applications.  Simply
1758  *  return the current state of the sgmii interface.
1759  **/
1760 static bool igb_sgmii_active_82575(struct e1000_hw *hw)
1761 {
1762         struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
1763         return dev_spec->sgmii_active;
1764 }
1765
1766 /**
1767  *  igb_reset_init_script_82575 - Inits HW defaults after reset
1768  *  @hw: pointer to the HW structure
1769  *
1770  *  Inits recommended HW defaults after a reset when there is no EEPROM
1771  *  detected. This is only for the 82575.
1772  **/
1773 static s32 igb_reset_init_script_82575(struct e1000_hw *hw)
1774 {
1775         if (hw->mac.type == e1000_82575) {
1776                 hw_dbg("Running reset init script for 82575\n");
1777                 /* SerDes configuration via SERDESCTRL */
1778                 igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x00, 0x0C);
1779                 igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x01, 0x78);
1780                 igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x1B, 0x23);
1781                 igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x23, 0x15);
1782
1783                 /* CCM configuration via CCMCTL register */
1784                 igb_write_8bit_ctrl_reg(hw, E1000_CCMCTL, 0x14, 0x00);
1785                 igb_write_8bit_ctrl_reg(hw, E1000_CCMCTL, 0x10, 0x00);
1786
1787                 /* PCIe lanes configuration */
1788                 igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x00, 0xEC);
1789                 igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x61, 0xDF);
1790                 igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x34, 0x05);
1791                 igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x2F, 0x81);
1792
1793                 /* PCIe PLL Configuration */
1794                 igb_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x02, 0x47);
1795                 igb_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x14, 0x00);
1796                 igb_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x10, 0x00);
1797         }
1798
1799         return 0;
1800 }
1801
1802 /**
1803  *  igb_read_mac_addr_82575 - Read device MAC address
1804  *  @hw: pointer to the HW structure
1805  **/
1806 static s32 igb_read_mac_addr_82575(struct e1000_hw *hw)
1807 {
1808         s32 ret_val = 0;
1809
1810         /* If there's an alternate MAC address place it in RAR0
1811          * so that it will override the Si installed default perm
1812          * address.
1813          */
1814         ret_val = igb_check_alt_mac_addr(hw);
1815         if (ret_val)
1816                 goto out;
1817
1818         ret_val = igb_read_mac_addr(hw);
1819
1820 out:
1821         return ret_val;
1822 }
1823
1824 /**
1825  * igb_power_down_phy_copper_82575 - Remove link during PHY power down
1826  * @hw: pointer to the HW structure
1827  *
1828  * In the case of a PHY power down to save power, or to turn off link during a
1829  * driver unload, or wake on lan is not enabled, remove the link.
1830  **/
1831 void igb_power_down_phy_copper_82575(struct e1000_hw *hw)
1832 {
1833         /* If the management interface is not enabled, then power down */
1834         if (!(igb_enable_mng_pass_thru(hw) || igb_check_reset_block(hw)))
1835                 igb_power_down_phy_copper(hw);
1836 }
1837
1838 /**
1839  *  igb_clear_hw_cntrs_82575 - Clear device specific hardware counters
1840  *  @hw: pointer to the HW structure
1841  *
1842  *  Clears the hardware counters by reading the counter registers.
1843  **/
1844 static void igb_clear_hw_cntrs_82575(struct e1000_hw *hw)
1845 {
1846         igb_clear_hw_cntrs_base(hw);
1847
1848         rd32(E1000_PRC64);
1849         rd32(E1000_PRC127);
1850         rd32(E1000_PRC255);
1851         rd32(E1000_PRC511);
1852         rd32(E1000_PRC1023);
1853         rd32(E1000_PRC1522);
1854         rd32(E1000_PTC64);
1855         rd32(E1000_PTC127);
1856         rd32(E1000_PTC255);
1857         rd32(E1000_PTC511);
1858         rd32(E1000_PTC1023);
1859         rd32(E1000_PTC1522);
1860
1861         rd32(E1000_ALGNERRC);
1862         rd32(E1000_RXERRC);
1863         rd32(E1000_TNCRS);
1864         rd32(E1000_CEXTERR);
1865         rd32(E1000_TSCTC);
1866         rd32(E1000_TSCTFC);
1867
1868         rd32(E1000_MGTPRC);
1869         rd32(E1000_MGTPDC);
1870         rd32(E1000_MGTPTC);
1871
1872         rd32(E1000_IAC);
1873         rd32(E1000_ICRXOC);
1874
1875         rd32(E1000_ICRXPTC);
1876         rd32(E1000_ICRXATC);
1877         rd32(E1000_ICTXPTC);
1878         rd32(E1000_ICTXATC);
1879         rd32(E1000_ICTXQEC);
1880         rd32(E1000_ICTXQMTC);
1881         rd32(E1000_ICRXDMTC);
1882
1883         rd32(E1000_CBTMPC);
1884         rd32(E1000_HTDPMC);
1885         rd32(E1000_CBRMPC);
1886         rd32(E1000_RPTHC);
1887         rd32(E1000_HGPTC);
1888         rd32(E1000_HTCBDPC);
1889         rd32(E1000_HGORCL);
1890         rd32(E1000_HGORCH);
1891         rd32(E1000_HGOTCL);
1892         rd32(E1000_HGOTCH);
1893         rd32(E1000_LENERRS);
1894
1895         /* This register should not be read in copper configurations */
1896         if (hw->phy.media_type == e1000_media_type_internal_serdes ||
1897             igb_sgmii_active_82575(hw))
1898                 rd32(E1000_SCVPC);
1899 }
1900
1901 /**
1902  *  igb_rx_fifo_flush_82575 - Clean rx fifo after RX enable
1903  *  @hw: pointer to the HW structure
1904  *
1905  *  After rx enable if managability is enabled then there is likely some
1906  *  bad data at the start of the fifo and possibly in the DMA fifo.  This
1907  *  function clears the fifos and flushes any packets that came in as rx was
1908  *  being enabled.
1909  **/
1910 void igb_rx_fifo_flush_82575(struct e1000_hw *hw)
1911 {
1912         u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled;
1913         int i, ms_wait;
1914
1915         if (hw->mac.type != e1000_82575 ||
1916             !(rd32(E1000_MANC) & E1000_MANC_RCV_TCO_EN))
1917                 return;
1918
1919         /* Disable all RX queues */
1920         for (i = 0; i < 4; i++) {
1921                 rxdctl[i] = rd32(E1000_RXDCTL(i));
1922                 wr32(E1000_RXDCTL(i),
1923                      rxdctl[i] & ~E1000_RXDCTL_QUEUE_ENABLE);
1924         }
1925         /* Poll all queues to verify they have shut down */
1926         for (ms_wait = 0; ms_wait < 10; ms_wait++) {
1927                 usleep_range(1000, 2000);
1928                 rx_enabled = 0;
1929                 for (i = 0; i < 4; i++)
1930                         rx_enabled |= rd32(E1000_RXDCTL(i));
1931                 if (!(rx_enabled & E1000_RXDCTL_QUEUE_ENABLE))
1932                         break;
1933         }
1934
1935         if (ms_wait == 10)
1936                 hw_dbg("Queue disable timed out after 10ms\n");
1937
1938         /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all
1939          * incoming packets are rejected.  Set enable and wait 2ms so that
1940          * any packet that was coming in as RCTL.EN was set is flushed
1941          */
1942         rfctl = rd32(E1000_RFCTL);
1943         wr32(E1000_RFCTL, rfctl & ~E1000_RFCTL_LEF);
1944
1945         rlpml = rd32(E1000_RLPML);
1946         wr32(E1000_RLPML, 0);
1947
1948         rctl = rd32(E1000_RCTL);
1949         temp_rctl = rctl & ~(E1000_RCTL_EN | E1000_RCTL_SBP);
1950         temp_rctl |= E1000_RCTL_LPE;
1951
1952         wr32(E1000_RCTL, temp_rctl);
1953         wr32(E1000_RCTL, temp_rctl | E1000_RCTL_EN);
1954         wrfl();
1955         usleep_range(2000, 3000);
1956
1957         /* Enable RX queues that were previously enabled and restore our
1958          * previous state
1959          */
1960         for (i = 0; i < 4; i++)
1961                 wr32(E1000_RXDCTL(i), rxdctl[i]);
1962         wr32(E1000_RCTL, rctl);
1963         wrfl();
1964
1965         wr32(E1000_RLPML, rlpml);
1966         wr32(E1000_RFCTL, rfctl);
1967
1968         /* Flush receive errors generated by workaround */
1969         rd32(E1000_ROC);
1970         rd32(E1000_RNBC);
1971         rd32(E1000_MPC);
1972 }
1973
1974 /**
1975  *  igb_set_pcie_completion_timeout - set pci-e completion timeout
1976  *  @hw: pointer to the HW structure
1977  *
1978  *  The defaults for 82575 and 82576 should be in the range of 50us to 50ms,
1979  *  however the hardware default for these parts is 500us to 1ms which is less
1980  *  than the 10ms recommended by the pci-e spec.  To address this we need to
1981  *  increase the value to either 10ms to 200ms for capability version 1 config,
1982  *  or 16ms to 55ms for version 2.
1983  **/
1984 static s32 igb_set_pcie_completion_timeout(struct e1000_hw *hw)
1985 {
1986         u32 gcr = rd32(E1000_GCR);
1987         s32 ret_val = 0;
1988         u16 pcie_devctl2;
1989
1990         /* only take action if timeout value is defaulted to 0 */
1991         if (gcr & E1000_GCR_CMPL_TMOUT_MASK)
1992                 goto out;
1993
1994         /* if capabilities version is type 1 we can write the
1995          * timeout of 10ms to 200ms through the GCR register
1996          */
1997         if (!(gcr & E1000_GCR_CAP_VER2)) {
1998                 gcr |= E1000_GCR_CMPL_TMOUT_10ms;
1999                 goto out;
2000         }
2001
2002         /* for version 2 capabilities we need to write the config space
2003          * directly in order to set the completion timeout value for
2004          * 16ms to 55ms
2005          */
2006         ret_val = igb_read_pcie_cap_reg(hw, PCIE_DEVICE_CONTROL2,
2007                                         &pcie_devctl2);
2008         if (ret_val)
2009                 goto out;
2010
2011         pcie_devctl2 |= PCIE_DEVICE_CONTROL2_16ms;
2012
2013         ret_val = igb_write_pcie_cap_reg(hw, PCIE_DEVICE_CONTROL2,
2014                                          &pcie_devctl2);
2015 out:
2016         /* disable completion timeout resend */
2017         gcr &= ~E1000_GCR_CMPL_TMOUT_RESEND;
2018
2019         wr32(E1000_GCR, gcr);
2020         return ret_val;
2021 }
2022
2023 /**
2024  *  igb_vmdq_set_anti_spoofing_pf - enable or disable anti-spoofing
2025  *  @hw: pointer to the hardware struct
2026  *  @enable: state to enter, either enabled or disabled
2027  *  @pf: Physical Function pool - do not set anti-spoofing for the PF
2028  *
2029  *  enables/disables L2 switch anti-spoofing functionality.
2030  **/
2031 void igb_vmdq_set_anti_spoofing_pf(struct e1000_hw *hw, bool enable, int pf)
2032 {
2033         u32 reg_val, reg_offset;
2034
2035         switch (hw->mac.type) {
2036         case e1000_82576:
2037                 reg_offset = E1000_DTXSWC;
2038                 break;
2039         case e1000_i350:
2040         case e1000_i354:
2041                 reg_offset = E1000_TXSWC;
2042                 break;
2043         default:
2044                 return;
2045         }
2046
2047         reg_val = rd32(reg_offset);
2048         if (enable) {
2049                 reg_val |= (E1000_DTXSWC_MAC_SPOOF_MASK |
2050                              E1000_DTXSWC_VLAN_SPOOF_MASK);
2051                 /* The PF can spoof - it has to in order to
2052                  * support emulation mode NICs
2053                  */
2054                 reg_val ^= (1 << pf | 1 << (pf + MAX_NUM_VFS));
2055         } else {
2056                 reg_val &= ~(E1000_DTXSWC_MAC_SPOOF_MASK |
2057                              E1000_DTXSWC_VLAN_SPOOF_MASK);
2058         }
2059         wr32(reg_offset, reg_val);
2060 }
2061
2062 /**
2063  *  igb_vmdq_set_loopback_pf - enable or disable vmdq loopback
2064  *  @hw: pointer to the hardware struct
2065  *  @enable: state to enter, either enabled or disabled
2066  *
2067  *  enables/disables L2 switch loopback functionality.
2068  **/
2069 void igb_vmdq_set_loopback_pf(struct e1000_hw *hw, bool enable)
2070 {
2071         u32 dtxswc;
2072
2073         switch (hw->mac.type) {
2074         case e1000_82576:
2075                 dtxswc = rd32(E1000_DTXSWC);
2076                 if (enable)
2077                         dtxswc |= E1000_DTXSWC_VMDQ_LOOPBACK_EN;
2078                 else
2079                         dtxswc &= ~E1000_DTXSWC_VMDQ_LOOPBACK_EN;
2080                 wr32(E1000_DTXSWC, dtxswc);
2081                 break;
2082         case e1000_i354:
2083         case e1000_i350:
2084                 dtxswc = rd32(E1000_TXSWC);
2085                 if (enable)
2086                         dtxswc |= E1000_DTXSWC_VMDQ_LOOPBACK_EN;
2087                 else
2088                         dtxswc &= ~E1000_DTXSWC_VMDQ_LOOPBACK_EN;
2089                 wr32(E1000_TXSWC, dtxswc);
2090                 break;
2091         default:
2092                 /* Currently no other hardware supports loopback */
2093                 break;
2094         }
2095
2096 }
2097
2098 /**
2099  *  igb_vmdq_set_replication_pf - enable or disable vmdq replication
2100  *  @hw: pointer to the hardware struct
2101  *  @enable: state to enter, either enabled or disabled
2102  *
2103  *  enables/disables replication of packets across multiple pools.
2104  **/
2105 void igb_vmdq_set_replication_pf(struct e1000_hw *hw, bool enable)
2106 {
2107         u32 vt_ctl = rd32(E1000_VT_CTL);
2108
2109         if (enable)
2110                 vt_ctl |= E1000_VT_CTL_VM_REPL_EN;
2111         else
2112                 vt_ctl &= ~E1000_VT_CTL_VM_REPL_EN;
2113
2114         wr32(E1000_VT_CTL, vt_ctl);
2115 }
2116
2117 /**
2118  *  igb_read_phy_reg_82580 - Read 82580 MDI control register
2119  *  @hw: pointer to the HW structure
2120  *  @offset: register offset to be read
2121  *  @data: pointer to the read data
2122  *
2123  *  Reads the MDI control register in the PHY at offset and stores the
2124  *  information read to data.
2125  **/
2126 static s32 igb_read_phy_reg_82580(struct e1000_hw *hw, u32 offset, u16 *data)
2127 {
2128         s32 ret_val;
2129
2130         ret_val = hw->phy.ops.acquire(hw);
2131         if (ret_val)
2132                 goto out;
2133
2134         ret_val = igb_read_phy_reg_mdic(hw, offset, data);
2135
2136         hw->phy.ops.release(hw);
2137
2138 out:
2139         return ret_val;
2140 }
2141
2142 /**
2143  *  igb_write_phy_reg_82580 - Write 82580 MDI control register
2144  *  @hw: pointer to the HW structure
2145  *  @offset: register offset to write to
2146  *  @data: data to write to register at offset
2147  *
2148  *  Writes data to MDI control register in the PHY at offset.
2149  **/
2150 static s32 igb_write_phy_reg_82580(struct e1000_hw *hw, u32 offset, u16 data)
2151 {
2152         s32 ret_val;
2153
2154
2155         ret_val = hw->phy.ops.acquire(hw);
2156         if (ret_val)
2157                 goto out;
2158
2159         ret_val = igb_write_phy_reg_mdic(hw, offset, data);
2160
2161         hw->phy.ops.release(hw);
2162
2163 out:
2164         return ret_val;
2165 }
2166
2167 /**
2168  *  igb_reset_mdicnfg_82580 - Reset MDICNFG destination and com_mdio bits
2169  *  @hw: pointer to the HW structure
2170  *
2171  *  This resets the the MDICNFG.Destination and MDICNFG.Com_MDIO bits based on
2172  *  the values found in the EEPROM.  This addresses an issue in which these
2173  *  bits are not restored from EEPROM after reset.
2174  **/
2175 static s32 igb_reset_mdicnfg_82580(struct e1000_hw *hw)
2176 {
2177         s32 ret_val = 0;
2178         u32 mdicnfg;
2179         u16 nvm_data = 0;
2180
2181         if (hw->mac.type != e1000_82580)
2182                 goto out;
2183         if (!igb_sgmii_active_82575(hw))
2184                 goto out;
2185
2186         ret_val = hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
2187                                    NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
2188                                    &nvm_data);
2189         if (ret_val) {
2190                 hw_dbg("NVM Read Error\n");
2191                 goto out;
2192         }
2193
2194         mdicnfg = rd32(E1000_MDICNFG);
2195         if (nvm_data & NVM_WORD24_EXT_MDIO)
2196                 mdicnfg |= E1000_MDICNFG_EXT_MDIO;
2197         if (nvm_data & NVM_WORD24_COM_MDIO)
2198                 mdicnfg |= E1000_MDICNFG_COM_MDIO;
2199         wr32(E1000_MDICNFG, mdicnfg);
2200 out:
2201         return ret_val;
2202 }
2203
2204 /**
2205  *  igb_reset_hw_82580 - Reset hardware
2206  *  @hw: pointer to the HW structure
2207  *
2208  *  This resets function or entire device (all ports, etc.)
2209  *  to a known state.
2210  **/
2211 static s32 igb_reset_hw_82580(struct e1000_hw *hw)
2212 {
2213         s32 ret_val = 0;
2214         /* BH SW mailbox bit in SW_FW_SYNC */
2215         u16 swmbsw_mask = E1000_SW_SYNCH_MB;
2216         u32 ctrl;
2217         bool global_device_reset = hw->dev_spec._82575.global_device_reset;
2218
2219         hw->dev_spec._82575.global_device_reset = false;
2220
2221         /* due to hw errata, global device reset doesn't always
2222          * work on 82580
2223          */
2224         if (hw->mac.type == e1000_82580)
2225                 global_device_reset = false;
2226
2227         /* Get current control state. */
2228         ctrl = rd32(E1000_CTRL);
2229
2230         /* Prevent the PCI-E bus from sticking if there is no TLP connection
2231          * on the last TLP read/write transaction when MAC is reset.
2232          */
2233         ret_val = igb_disable_pcie_master(hw);
2234         if (ret_val)
2235                 hw_dbg("PCI-E Master disable polling has failed.\n");
2236
2237         hw_dbg("Masking off all interrupts\n");
2238         wr32(E1000_IMC, 0xffffffff);
2239         wr32(E1000_RCTL, 0);
2240         wr32(E1000_TCTL, E1000_TCTL_PSP);
2241         wrfl();
2242
2243         usleep_range(10000, 11000);
2244
2245         /* Determine whether or not a global dev reset is requested */
2246         if (global_device_reset &&
2247                 hw->mac.ops.acquire_swfw_sync(hw, swmbsw_mask))
2248                         global_device_reset = false;
2249
2250         if (global_device_reset &&
2251                 !(rd32(E1000_STATUS) & E1000_STAT_DEV_RST_SET))
2252                 ctrl |= E1000_CTRL_DEV_RST;
2253         else
2254                 ctrl |= E1000_CTRL_RST;
2255
2256         wr32(E1000_CTRL, ctrl);
2257         wrfl();
2258
2259         /* Add delay to insure DEV_RST has time to complete */
2260         if (global_device_reset)
2261                 usleep_range(5000, 6000);
2262
2263         ret_val = igb_get_auto_rd_done(hw);
2264         if (ret_val) {
2265                 /* When auto config read does not complete, do not
2266                  * return with an error. This can happen in situations
2267                  * where there is no eeprom and prevents getting link.
2268                  */
2269                 hw_dbg("Auto Read Done did not complete\n");
2270         }
2271
2272         /* clear global device reset status bit */
2273         wr32(E1000_STATUS, E1000_STAT_DEV_RST_SET);
2274
2275         /* Clear any pending interrupt events. */
2276         wr32(E1000_IMC, 0xffffffff);
2277         rd32(E1000_ICR);
2278
2279         ret_val = igb_reset_mdicnfg_82580(hw);
2280         if (ret_val)
2281                 hw_dbg("Could not reset MDICNFG based on EEPROM\n");
2282
2283         /* Install any alternate MAC address into RAR0 */
2284         ret_val = igb_check_alt_mac_addr(hw);
2285
2286         /* Release semaphore */
2287         if (global_device_reset)
2288                 hw->mac.ops.release_swfw_sync(hw, swmbsw_mask);
2289
2290         return ret_val;
2291 }
2292
2293 /**
2294  *  igb_rxpbs_adjust_82580 - adjust RXPBS value to reflect actual RX PBA size
2295  *  @data: data received by reading RXPBS register
2296  *
2297  *  The 82580 uses a table based approach for packet buffer allocation sizes.
2298  *  This function converts the retrieved value into the correct table value
2299  *     0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7
2300  *  0x0 36  72 144   1   2   4   8  16
2301  *  0x8 35  70 140 rsv rsv rsv rsv rsv
2302  */
2303 u16 igb_rxpbs_adjust_82580(u32 data)
2304 {
2305         u16 ret_val = 0;
2306
2307         if (data < ARRAY_SIZE(e1000_82580_rxpbs_table))
2308                 ret_val = e1000_82580_rxpbs_table[data];
2309
2310         return ret_val;
2311 }
2312
2313 /**
2314  *  igb_validate_nvm_checksum_with_offset - Validate EEPROM
2315  *  checksum
2316  *  @hw: pointer to the HW structure
2317  *  @offset: offset in words of the checksum protected region
2318  *
2319  *  Calculates the EEPROM checksum by reading/adding each word of the EEPROM
2320  *  and then verifies that the sum of the EEPROM is equal to 0xBABA.
2321  **/
2322 static s32 igb_validate_nvm_checksum_with_offset(struct e1000_hw *hw,
2323                                                  u16 offset)
2324 {
2325         s32 ret_val = 0;
2326         u16 checksum = 0;
2327         u16 i, nvm_data;
2328
2329         for (i = offset; i < ((NVM_CHECKSUM_REG + offset) + 1); i++) {
2330                 ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data);
2331                 if (ret_val) {
2332                         hw_dbg("NVM Read Error\n");
2333                         goto out;
2334                 }
2335                 checksum += nvm_data;
2336         }
2337
2338         if (checksum != (u16) NVM_SUM) {
2339                 hw_dbg("NVM Checksum Invalid\n");
2340                 ret_val = -E1000_ERR_NVM;
2341                 goto out;
2342         }
2343
2344 out:
2345         return ret_val;
2346 }
2347
2348 /**
2349  *  igb_update_nvm_checksum_with_offset - Update EEPROM
2350  *  checksum
2351  *  @hw: pointer to the HW structure
2352  *  @offset: offset in words of the checksum protected region
2353  *
2354  *  Updates the EEPROM checksum by reading/adding each word of the EEPROM
2355  *  up to the checksum.  Then calculates the EEPROM checksum and writes the
2356  *  value to the EEPROM.
2357  **/
2358 static s32 igb_update_nvm_checksum_with_offset(struct e1000_hw *hw, u16 offset)
2359 {
2360         s32 ret_val;
2361         u16 checksum = 0;
2362         u16 i, nvm_data;
2363
2364         for (i = offset; i < (NVM_CHECKSUM_REG + offset); i++) {
2365                 ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data);
2366                 if (ret_val) {
2367                         hw_dbg("NVM Read Error while updating checksum.\n");
2368                         goto out;
2369                 }
2370                 checksum += nvm_data;
2371         }
2372         checksum = (u16) NVM_SUM - checksum;
2373         ret_val = hw->nvm.ops.write(hw, (NVM_CHECKSUM_REG + offset), 1,
2374                                 &checksum);
2375         if (ret_val)
2376                 hw_dbg("NVM Write Error while updating checksum.\n");
2377
2378 out:
2379         return ret_val;
2380 }
2381
2382 /**
2383  *  igb_validate_nvm_checksum_82580 - Validate EEPROM checksum
2384  *  @hw: pointer to the HW structure
2385  *
2386  *  Calculates the EEPROM section checksum by reading/adding each word of
2387  *  the EEPROM and then verifies that the sum of the EEPROM is
2388  *  equal to 0xBABA.
2389  **/
2390 static s32 igb_validate_nvm_checksum_82580(struct e1000_hw *hw)
2391 {
2392         s32 ret_val = 0;
2393         u16 eeprom_regions_count = 1;
2394         u16 j, nvm_data;
2395         u16 nvm_offset;
2396
2397         ret_val = hw->nvm.ops.read(hw, NVM_COMPATIBILITY_REG_3, 1, &nvm_data);
2398         if (ret_val) {
2399                 hw_dbg("NVM Read Error\n");
2400                 goto out;
2401         }
2402
2403         if (nvm_data & NVM_COMPATIBILITY_BIT_MASK) {
2404                 /* if checksums compatibility bit is set validate checksums
2405                  * for all 4 ports.
2406                  */
2407                 eeprom_regions_count = 4;
2408         }
2409
2410         for (j = 0; j < eeprom_regions_count; j++) {
2411                 nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
2412                 ret_val = igb_validate_nvm_checksum_with_offset(hw,
2413                                                                 nvm_offset);
2414                 if (ret_val != 0)
2415                         goto out;
2416         }
2417
2418 out:
2419         return ret_val;
2420 }
2421
2422 /**
2423  *  igb_update_nvm_checksum_82580 - Update EEPROM checksum
2424  *  @hw: pointer to the HW structure
2425  *
2426  *  Updates the EEPROM section checksums for all 4 ports by reading/adding
2427  *  each word of the EEPROM up to the checksum.  Then calculates the EEPROM
2428  *  checksum and writes the value to the EEPROM.
2429  **/
2430 static s32 igb_update_nvm_checksum_82580(struct e1000_hw *hw)
2431 {
2432         s32 ret_val;
2433         u16 j, nvm_data;
2434         u16 nvm_offset;
2435
2436         ret_val = hw->nvm.ops.read(hw, NVM_COMPATIBILITY_REG_3, 1, &nvm_data);
2437         if (ret_val) {
2438                 hw_dbg("NVM Read Error while updating checksum compatibility bit.\n");
2439                 goto out;
2440         }
2441
2442         if ((nvm_data & NVM_COMPATIBILITY_BIT_MASK) == 0) {
2443                 /* set compatibility bit to validate checksums appropriately */
2444                 nvm_data = nvm_data | NVM_COMPATIBILITY_BIT_MASK;
2445                 ret_val = hw->nvm.ops.write(hw, NVM_COMPATIBILITY_REG_3, 1,
2446                                         &nvm_data);
2447                 if (ret_val) {
2448                         hw_dbg("NVM Write Error while updating checksum compatibility bit.\n");
2449                         goto out;
2450                 }
2451         }
2452
2453         for (j = 0; j < 4; j++) {
2454                 nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
2455                 ret_val = igb_update_nvm_checksum_with_offset(hw, nvm_offset);
2456                 if (ret_val)
2457                         goto out;
2458         }
2459
2460 out:
2461         return ret_val;
2462 }
2463
2464 /**
2465  *  igb_validate_nvm_checksum_i350 - Validate EEPROM checksum
2466  *  @hw: pointer to the HW structure
2467  *
2468  *  Calculates the EEPROM section checksum by reading/adding each word of
2469  *  the EEPROM and then verifies that the sum of the EEPROM is
2470  *  equal to 0xBABA.
2471  **/
2472 static s32 igb_validate_nvm_checksum_i350(struct e1000_hw *hw)
2473 {
2474         s32 ret_val = 0;
2475         u16 j;
2476         u16 nvm_offset;
2477
2478         for (j = 0; j < 4; j++) {
2479                 nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
2480                 ret_val = igb_validate_nvm_checksum_with_offset(hw,
2481                                                                 nvm_offset);
2482                 if (ret_val != 0)
2483                         goto out;
2484         }
2485
2486 out:
2487         return ret_val;
2488 }
2489
2490 /**
2491  *  igb_update_nvm_checksum_i350 - Update EEPROM checksum
2492  *  @hw: pointer to the HW structure
2493  *
2494  *  Updates the EEPROM section checksums for all 4 ports by reading/adding
2495  *  each word of the EEPROM up to the checksum.  Then calculates the EEPROM
2496  *  checksum and writes the value to the EEPROM.
2497  **/
2498 static s32 igb_update_nvm_checksum_i350(struct e1000_hw *hw)
2499 {
2500         s32 ret_val = 0;
2501         u16 j;
2502         u16 nvm_offset;
2503
2504         for (j = 0; j < 4; j++) {
2505                 nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
2506                 ret_val = igb_update_nvm_checksum_with_offset(hw, nvm_offset);
2507                 if (ret_val != 0)
2508                         goto out;
2509         }
2510
2511 out:
2512         return ret_val;
2513 }
2514
2515 /**
2516  *  __igb_access_emi_reg - Read/write EMI register
2517  *  @hw: pointer to the HW structure
2518  *  @addr: EMI address to program
2519  *  @data: pointer to value to read/write from/to the EMI address
2520  *  @read: boolean flag to indicate read or write
2521  **/
2522 static s32 __igb_access_emi_reg(struct e1000_hw *hw, u16 address,
2523                                   u16 *data, bool read)
2524 {
2525         s32 ret_val = 0;
2526
2527         ret_val = hw->phy.ops.write_reg(hw, E1000_EMIADD, address);
2528         if (ret_val)
2529                 return ret_val;
2530
2531         if (read)
2532                 ret_val = hw->phy.ops.read_reg(hw, E1000_EMIDATA, data);
2533         else
2534                 ret_val = hw->phy.ops.write_reg(hw, E1000_EMIDATA, *data);
2535
2536         return ret_val;
2537 }
2538
2539 /**
2540  *  igb_read_emi_reg - Read Extended Management Interface register
2541  *  @hw: pointer to the HW structure
2542  *  @addr: EMI address to program
2543  *  @data: value to be read from the EMI address
2544  **/
2545 s32 igb_read_emi_reg(struct e1000_hw *hw, u16 addr, u16 *data)
2546 {
2547         return __igb_access_emi_reg(hw, addr, data, true);
2548 }
2549
2550 /**
2551  *  igb_set_eee_i350 - Enable/disable EEE support
2552  *  @hw: pointer to the HW structure
2553  *
2554  *  Enable/disable EEE based on setting in dev_spec structure.
2555  *
2556  **/
2557 s32 igb_set_eee_i350(struct e1000_hw *hw)
2558 {
2559         u32 ipcnfg, eeer;
2560
2561         if ((hw->mac.type < e1000_i350) ||
2562             (hw->phy.media_type != e1000_media_type_copper))
2563                 goto out;
2564         ipcnfg = rd32(E1000_IPCNFG);
2565         eeer = rd32(E1000_EEER);
2566
2567         /* enable or disable per user setting */
2568         if (!(hw->dev_spec._82575.eee_disable)) {
2569                 u32 eee_su = rd32(E1000_EEE_SU);
2570
2571                 ipcnfg |= (E1000_IPCNFG_EEE_1G_AN | E1000_IPCNFG_EEE_100M_AN);
2572                 eeer |= (E1000_EEER_TX_LPI_EN | E1000_EEER_RX_LPI_EN |
2573                         E1000_EEER_LPI_FC);
2574
2575                 /* This bit should not be set in normal operation. */
2576                 if (eee_su & E1000_EEE_SU_LPI_CLK_STP)
2577                         hw_dbg("LPI Clock Stop Bit should not be set!\n");
2578
2579         } else {
2580                 ipcnfg &= ~(E1000_IPCNFG_EEE_1G_AN |
2581                         E1000_IPCNFG_EEE_100M_AN);
2582                 eeer &= ~(E1000_EEER_TX_LPI_EN |
2583                         E1000_EEER_RX_LPI_EN |
2584                         E1000_EEER_LPI_FC);
2585         }
2586         wr32(E1000_IPCNFG, ipcnfg);
2587         wr32(E1000_EEER, eeer);
2588         rd32(E1000_IPCNFG);
2589         rd32(E1000_EEER);
2590 out:
2591
2592         return 0;
2593 }
2594
2595 /**
2596  *  igb_set_eee_i354 - Enable/disable EEE support
2597  *  @hw: pointer to the HW structure
2598  *
2599  *  Enable/disable EEE legacy mode based on setting in dev_spec structure.
2600  *
2601  **/
2602 s32 igb_set_eee_i354(struct e1000_hw *hw)
2603 {
2604         struct e1000_phy_info *phy = &hw->phy;
2605         s32 ret_val = 0;
2606         u16 phy_data;
2607
2608         if ((hw->phy.media_type != e1000_media_type_copper) ||
2609             (phy->id != M88E1543_E_PHY_ID))
2610                 goto out;
2611
2612         if (!hw->dev_spec._82575.eee_disable) {
2613                 /* Switch to PHY page 18. */
2614                 ret_val = phy->ops.write_reg(hw, E1000_M88E1543_PAGE_ADDR, 18);
2615                 if (ret_val)
2616                         goto out;
2617
2618                 ret_val = phy->ops.read_reg(hw, E1000_M88E1543_EEE_CTRL_1,
2619                                             &phy_data);
2620                 if (ret_val)
2621                         goto out;
2622
2623                 phy_data |= E1000_M88E1543_EEE_CTRL_1_MS;
2624                 ret_val = phy->ops.write_reg(hw, E1000_M88E1543_EEE_CTRL_1,
2625                                              phy_data);
2626                 if (ret_val)
2627                         goto out;
2628
2629                 /* Return the PHY to page 0. */
2630                 ret_val = phy->ops.write_reg(hw, E1000_M88E1543_PAGE_ADDR, 0);
2631                 if (ret_val)
2632                         goto out;
2633
2634                 /* Turn on EEE advertisement. */
2635                 ret_val = igb_read_xmdio_reg(hw, E1000_EEE_ADV_ADDR_I354,
2636                                              E1000_EEE_ADV_DEV_I354,
2637                                              &phy_data);
2638                 if (ret_val)
2639                         goto out;
2640
2641                 phy_data |= E1000_EEE_ADV_100_SUPPORTED |
2642                             E1000_EEE_ADV_1000_SUPPORTED;
2643                 ret_val = igb_write_xmdio_reg(hw, E1000_EEE_ADV_ADDR_I354,
2644                                                 E1000_EEE_ADV_DEV_I354,
2645                                                 phy_data);
2646         } else {
2647                 /* Turn off EEE advertisement. */
2648                 ret_val = igb_read_xmdio_reg(hw, E1000_EEE_ADV_ADDR_I354,
2649                                              E1000_EEE_ADV_DEV_I354,
2650                                              &phy_data);
2651                 if (ret_val)
2652                         goto out;
2653
2654                 phy_data &= ~(E1000_EEE_ADV_100_SUPPORTED |
2655                               E1000_EEE_ADV_1000_SUPPORTED);
2656                 ret_val = igb_write_xmdio_reg(hw, E1000_EEE_ADV_ADDR_I354,
2657                                               E1000_EEE_ADV_DEV_I354,
2658                                               phy_data);
2659         }
2660
2661 out:
2662         return ret_val;
2663 }
2664
2665 /**
2666  *  igb_get_eee_status_i354 - Get EEE status
2667  *  @hw: pointer to the HW structure
2668  *  @status: EEE status
2669  *
2670  *  Get EEE status by guessing based on whether Tx or Rx LPI indications have
2671  *  been received.
2672  **/
2673 s32 igb_get_eee_status_i354(struct e1000_hw *hw, bool *status)
2674 {
2675         struct e1000_phy_info *phy = &hw->phy;
2676         s32 ret_val = 0;
2677         u16 phy_data;
2678
2679         /* Check if EEE is supported on this device. */
2680         if ((hw->phy.media_type != e1000_media_type_copper) ||
2681             (phy->id != M88E1543_E_PHY_ID))
2682                 goto out;
2683
2684         ret_val = igb_read_xmdio_reg(hw, E1000_PCS_STATUS_ADDR_I354,
2685                                      E1000_PCS_STATUS_DEV_I354,
2686                                      &phy_data);
2687         if (ret_val)
2688                 goto out;
2689
2690         *status = phy_data & (E1000_PCS_STATUS_TX_LPI_RCVD |
2691                               E1000_PCS_STATUS_RX_LPI_RCVD) ? true : false;
2692
2693 out:
2694         return ret_val;
2695 }
2696
2697 static const u8 e1000_emc_temp_data[4] = {
2698         E1000_EMC_INTERNAL_DATA,
2699         E1000_EMC_DIODE1_DATA,
2700         E1000_EMC_DIODE2_DATA,
2701         E1000_EMC_DIODE3_DATA
2702 };
2703 static const u8 e1000_emc_therm_limit[4] = {
2704         E1000_EMC_INTERNAL_THERM_LIMIT,
2705         E1000_EMC_DIODE1_THERM_LIMIT,
2706         E1000_EMC_DIODE2_THERM_LIMIT,
2707         E1000_EMC_DIODE3_THERM_LIMIT
2708 };
2709
2710 #ifdef CONFIG_IGB_HWMON
2711 /**
2712  *  igb_get_thermal_sensor_data_generic - Gathers thermal sensor data
2713  *  @hw: pointer to hardware structure
2714  *
2715  *  Updates the temperatures in mac.thermal_sensor_data
2716  **/
2717 static s32 igb_get_thermal_sensor_data_generic(struct e1000_hw *hw)
2718 {
2719         u16 ets_offset;
2720         u16 ets_cfg;
2721         u16 ets_sensor;
2722         u8  num_sensors;
2723         u8  sensor_index;
2724         u8  sensor_location;
2725         u8  i;
2726         struct e1000_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;
2727
2728         if ((hw->mac.type != e1000_i350) || (hw->bus.func != 0))
2729                 return E1000_NOT_IMPLEMENTED;
2730
2731         data->sensor[0].temp = (rd32(E1000_THMJT) & 0xFF);
2732
2733         /* Return the internal sensor only if ETS is unsupported */
2734         hw->nvm.ops.read(hw, NVM_ETS_CFG, 1, &ets_offset);
2735         if ((ets_offset == 0x0000) || (ets_offset == 0xFFFF))
2736                 return 0;
2737
2738         hw->nvm.ops.read(hw, ets_offset, 1, &ets_cfg);
2739         if (((ets_cfg & NVM_ETS_TYPE_MASK) >> NVM_ETS_TYPE_SHIFT)
2740             != NVM_ETS_TYPE_EMC)
2741                 return E1000_NOT_IMPLEMENTED;
2742
2743         num_sensors = (ets_cfg & NVM_ETS_NUM_SENSORS_MASK);
2744         if (num_sensors > E1000_MAX_SENSORS)
2745                 num_sensors = E1000_MAX_SENSORS;
2746
2747         for (i = 1; i < num_sensors; i++) {
2748                 hw->nvm.ops.read(hw, (ets_offset + i), 1, &ets_sensor);
2749                 sensor_index = ((ets_sensor & NVM_ETS_DATA_INDEX_MASK) >>
2750                                 NVM_ETS_DATA_INDEX_SHIFT);
2751                 sensor_location = ((ets_sensor & NVM_ETS_DATA_LOC_MASK) >>
2752                                    NVM_ETS_DATA_LOC_SHIFT);
2753
2754                 if (sensor_location != 0)
2755                         hw->phy.ops.read_i2c_byte(hw,
2756                                         e1000_emc_temp_data[sensor_index],
2757                                         E1000_I2C_THERMAL_SENSOR_ADDR,
2758                                         &data->sensor[i].temp);
2759         }
2760         return 0;
2761 }
2762
2763 /**
2764  *  igb_init_thermal_sensor_thresh_generic - Sets thermal sensor thresholds
2765  *  @hw: pointer to hardware structure
2766  *
2767  *  Sets the thermal sensor thresholds according to the NVM map
2768  *  and save off the threshold and location values into mac.thermal_sensor_data
2769  **/
2770 static s32 igb_init_thermal_sensor_thresh_generic(struct e1000_hw *hw)
2771 {
2772         u16 ets_offset;
2773         u16 ets_cfg;
2774         u16 ets_sensor;
2775         u8  low_thresh_delta;
2776         u8  num_sensors;
2777         u8  sensor_index;
2778         u8  sensor_location;
2779         u8  therm_limit;
2780         u8  i;
2781         struct e1000_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;
2782
2783         if ((hw->mac.type != e1000_i350) || (hw->bus.func != 0))
2784                 return E1000_NOT_IMPLEMENTED;
2785
2786         memset(data, 0, sizeof(struct e1000_thermal_sensor_data));
2787
2788         data->sensor[0].location = 0x1;
2789         data->sensor[0].caution_thresh =
2790                 (rd32(E1000_THHIGHTC) & 0xFF);
2791         data->sensor[0].max_op_thresh =
2792                 (rd32(E1000_THLOWTC) & 0xFF);
2793
2794         /* Return the internal sensor only if ETS is unsupported */
2795         hw->nvm.ops.read(hw, NVM_ETS_CFG, 1, &ets_offset);
2796         if ((ets_offset == 0x0000) || (ets_offset == 0xFFFF))
2797                 return 0;
2798
2799         hw->nvm.ops.read(hw, ets_offset, 1, &ets_cfg);
2800         if (((ets_cfg & NVM_ETS_TYPE_MASK) >> NVM_ETS_TYPE_SHIFT)
2801             != NVM_ETS_TYPE_EMC)
2802                 return E1000_NOT_IMPLEMENTED;
2803
2804         low_thresh_delta = ((ets_cfg & NVM_ETS_LTHRES_DELTA_MASK) >>
2805                             NVM_ETS_LTHRES_DELTA_SHIFT);
2806         num_sensors = (ets_cfg & NVM_ETS_NUM_SENSORS_MASK);
2807
2808         for (i = 1; i <= num_sensors; i++) {
2809                 hw->nvm.ops.read(hw, (ets_offset + i), 1, &ets_sensor);
2810                 sensor_index = ((ets_sensor & NVM_ETS_DATA_INDEX_MASK) >>
2811                                 NVM_ETS_DATA_INDEX_SHIFT);
2812                 sensor_location = ((ets_sensor & NVM_ETS_DATA_LOC_MASK) >>
2813                                    NVM_ETS_DATA_LOC_SHIFT);
2814                 therm_limit = ets_sensor & NVM_ETS_DATA_HTHRESH_MASK;
2815
2816                 hw->phy.ops.write_i2c_byte(hw,
2817                         e1000_emc_therm_limit[sensor_index],
2818                         E1000_I2C_THERMAL_SENSOR_ADDR,
2819                         therm_limit);
2820
2821                 if ((i < E1000_MAX_SENSORS) && (sensor_location != 0)) {
2822                         data->sensor[i].location = sensor_location;
2823                         data->sensor[i].caution_thresh = therm_limit;
2824                         data->sensor[i].max_op_thresh = therm_limit -
2825                                                         low_thresh_delta;
2826                 }
2827         }
2828         return 0;
2829 }
2830
2831 #endif
2832 static struct e1000_mac_operations e1000_mac_ops_82575 = {
2833         .init_hw              = igb_init_hw_82575,
2834         .check_for_link       = igb_check_for_link_82575,
2835         .rar_set              = igb_rar_set,
2836         .read_mac_addr        = igb_read_mac_addr_82575,
2837         .get_speed_and_duplex = igb_get_link_up_info_82575,
2838 #ifdef CONFIG_IGB_HWMON
2839         .get_thermal_sensor_data = igb_get_thermal_sensor_data_generic,
2840         .init_thermal_sensor_thresh = igb_init_thermal_sensor_thresh_generic,
2841 #endif
2842 };
2843
2844 static struct e1000_phy_operations e1000_phy_ops_82575 = {
2845         .acquire              = igb_acquire_phy_82575,
2846         .get_cfg_done         = igb_get_cfg_done_82575,
2847         .release              = igb_release_phy_82575,
2848         .write_i2c_byte       = igb_write_i2c_byte,
2849         .read_i2c_byte        = igb_read_i2c_byte,
2850 };
2851
2852 static struct e1000_nvm_operations e1000_nvm_ops_82575 = {
2853         .acquire              = igb_acquire_nvm_82575,
2854         .read                 = igb_read_nvm_eerd,
2855         .release              = igb_release_nvm_82575,
2856         .write                = igb_write_nvm_spi,
2857 };
2858
2859 const struct e1000_info e1000_82575_info = {
2860         .get_invariants = igb_get_invariants_82575,
2861         .mac_ops = &e1000_mac_ops_82575,
2862         .phy_ops = &e1000_phy_ops_82575,
2863         .nvm_ops = &e1000_nvm_ops_82575,
2864 };
2865