drivers/net/ethernet/atheros/atl1c/atl1c_hw.c

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/mii.h>
  24 #include <linux/crc32.h>
  25
  26 #include "atl1c.h"
  27
  28 /*
  29  * check_eeprom_exist
  30  * return 1 if eeprom exist
  31  */
  32 int atl1c_check_eeprom_exist(struct atl1c_hw *hw)
  33 {
  34         u32 data;
  35
  36         AT_READ_REG(hw, REG_TWSI_DEBUG, &data);
  37         if (data & TWSI_DEBUG_DEV_EXIST)
  38                 return 1;
  39
  40         AT_READ_REG(hw, REG_MASTER_CTRL, &data);
  41         if (data & MASTER_CTRL_OTP_SEL)
  42                 return 1;
  43         return 0;
  44 }
  45
  46 void atl1c_hw_set_mac_addr(struct atl1c_hw *hw)
  47 {
  48         u32 value;
  49         /*
  50          * 00-0B-6A-F6-00-DC
  51          * 0:  6AF600DC 1: 000B
  52          * low dword
  53          */
  54         value = (((u32)hw->mac_addr[2]) << 24) |
  55                 (((u32)hw->mac_addr[3]) << 16) |
  56                 (((u32)hw->mac_addr[4]) << 8)  |
  57                 (((u32)hw->mac_addr[5])) ;
  58         AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
  59         /* hight dword */
  60         value = (((u32)hw->mac_addr[0]) << 8) |
  61                 (((u32)hw->mac_addr[1])) ;
  62         AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
  63 }
  64
  65 /*
  66  * atl1c_get_permanent_address
  67  * return 0 if get valid mac address,
  68  */
  69 static int atl1c_get_permanent_address(struct atl1c_hw *hw)
  70 {
  71         u32 addr[2];
  72         u32 i;
  73         u32 otp_ctrl_data;
  74         u32 twsi_ctrl_data;
  75         u32 ltssm_ctrl_data;
  76         u32 wol_data;
  77         u8  eth_addr[ETH_ALEN];
  78         u16 phy_data;
  79         bool raise_vol = false;
  80
  81         /* init */
  82         addr[0] = addr[1] = 0;
  83         AT_READ_REG(hw, REG_OTP_CTRL, &otp_ctrl_data);
  84         if (atl1c_check_eeprom_exist(hw)) {
  85                 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  86                         /* Enable OTP CLK */
  87                         if (!(otp_ctrl_data & OTP_CTRL_CLK_EN)) {
  88                                 otp_ctrl_data |= OTP_CTRL_CLK_EN;
  89                                 AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
  90                                 AT_WRITE_FLUSH(hw);
  91                                 msleep(1);
  92                         }
  93                 }
  94
  95                 if (hw->nic_type == athr_l2c_b ||
  96                     hw->nic_type == athr_l2c_b2 ||
  97                     hw->nic_type == athr_l1d) {
  98                         atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x00);
  99                         if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &phy_data))
 100                                 goto out;
 101                         phy_data &= 0xFF7F;
 102                         atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data);
 103
 104                         atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x3B);
 105                         if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &phy_data))
 106                                 goto out;
 107                         phy_data |= 0x8;
 108                         atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data);
 109                         udelay(20);
 110                         raise_vol = true;
 111                 }
 112                 /* close open bit of ReadOnly*/
 113                 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &ltssm_ctrl_data);
 114                 ltssm_ctrl_data &= ~LTSSM_ID_EN_WRO;
 115                 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, ltssm_ctrl_data);
 116
 117                 /* clear any WOL settings */
 118                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 119                 AT_READ_REG(hw, REG_WOL_CTRL, &wol_data);
 120
 121
 122                 AT_READ_REG(hw, REG_TWSI_CTRL, &twsi_ctrl_data);
 123                 twsi_ctrl_data |= TWSI_CTRL_SW_LDSTART;
 124                 AT_WRITE_REG(hw, REG_TWSI_CTRL, twsi_ctrl_data);
 125                 for (i = 0; i < AT_TWSI_EEPROM_TIMEOUT; i++) {
 126                         msleep(10);
 127                         AT_READ_REG(hw, REG_TWSI_CTRL, &twsi_ctrl_data);
 128                         if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0)
 129                                 break;
 130                 }
 131                 if (i >= AT_TWSI_EEPROM_TIMEOUT)
 132                         return -1;
 133         }
 134         /* Disable OTP_CLK */
 135         if ((hw->nic_type == athr_l1c || hw->nic_type == athr_l2c)) {
 136                 otp_ctrl_data &= ~OTP_CTRL_CLK_EN;
 137                 AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
 138                 msleep(1);
 139         }
 140         if (raise_vol) {
 141                 if (hw->nic_type == athr_l2c_b ||
 142                     hw->nic_type == athr_l2c_b2 ||
 143                     hw->nic_type == athr_l1d ||
 144                     hw->nic_type == athr_l1d_2) {
 145                         atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x00);
 146                         if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &phy_data))
 147                                 goto out;
 148                         phy_data |= 0x80;
 149                         atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data);
 150
 151                         atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x3B);
 152                         if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &phy_data))
 153                                 goto out;
 154                         phy_data &= 0xFFF7;
 155                         atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data);
 156                         udelay(20);
 157                 }
 158         }
 159
 160         /* maybe MAC-address is from BIOS */
 161         AT_READ_REG(hw, REG_MAC_STA_ADDR, &addr[0]);
 162         AT_READ_REG(hw, REG_MAC_STA_ADDR + 4, &addr[1]);
 163         *(u32 *) &eth_addr[2] = swab32(addr[0]);
 164         *(u16 *) &eth_addr[0] = swab16(*(u16 *)&addr[1]);
 165
 166         if (is_valid_ether_addr(eth_addr)) {
 167                 memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
 168                 return 0;
 169         }
 170
 171 out:
 172         return -1;
 173 }
 174
 175 bool atl1c_read_eeprom(struct atl1c_hw *hw, u32 offset, u32 *p_value)
 176 {
 177         int i;
 178         int ret = false;
 179         u32 otp_ctrl_data;
 180         u32 control;
 181         u32 data;
 182
 183         if (offset & 3)
 184                 return ret; /* address do not align */
 185
 186         AT_READ_REG(hw, REG_OTP_CTRL, &otp_ctrl_data);
 187         if (!(otp_ctrl_data & OTP_CTRL_CLK_EN))
 188                 AT_WRITE_REG(hw, REG_OTP_CTRL,
 189                                 (otp_ctrl_data | OTP_CTRL_CLK_EN));
 190
 191         AT_WRITE_REG(hw, REG_EEPROM_DATA_LO, 0);
 192         control = (offset & EEPROM_CTRL_ADDR_MASK) << EEPROM_CTRL_ADDR_SHIFT;
 193         AT_WRITE_REG(hw, REG_EEPROM_CTRL, control);
 194
 195         for (i = 0; i < 10; i++) {
 196                 udelay(100);
 197                 AT_READ_REG(hw, REG_EEPROM_CTRL, &control);
 198                 if (control & EEPROM_CTRL_RW)
 199                         break;
 200         }
 201         if (control & EEPROM_CTRL_RW) {
 202                 AT_READ_REG(hw, REG_EEPROM_CTRL, &data);
 203                 AT_READ_REG(hw, REG_EEPROM_DATA_LO, p_value);
 204                 data = data & 0xFFFF;
 205                 *p_value = swab32((data << 16) | (*p_value >> 16));
 206                 ret = true;
 207         }
 208         if (!(otp_ctrl_data & OTP_CTRL_CLK_EN))
 209                 AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
 210
 211         return ret;
 212 }
 213 /*
 214  * Reads the adapter's MAC address from the EEPROM
 215  *
 216  * hw - Struct containing variables accessed by shared code
 217  */
 218 int atl1c_read_mac_addr(struct atl1c_hw *hw)
 219 {
 220         int err = 0;
 221
 222         err = atl1c_get_permanent_address(hw);
 223         if (err)
 224                 random_ether_addr(hw->perm_mac_addr);
 225
 226         memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof(hw->perm_mac_addr));
 227         return 0;
 228 }
 229
 230 /*
 231  * atl1c_hash_mc_addr
 232  *  purpose
 233  *      set hash value for a multicast address
 234  *      hash calcu processing :
 235  *          1. calcu 32bit CRC for multicast address
 236  *          2. reverse crc with MSB to LSB
 237  */
 238 u32 atl1c_hash_mc_addr(struct atl1c_hw *hw, u8 *mc_addr)
 239 {
 240         u32 crc32;
 241         u32 value = 0;
 242         int i;
 243
 244         crc32 = ether_crc_le(6, mc_addr);
 245         for (i = 0; i < 32; i++)
 246                 value |= (((crc32 >> i) & 1) << (31 - i));
 247
 248         return value;
 249 }
 250
 251 /*
 252  * Sets the bit in the multicast table corresponding to the hash value.
 253  * hw - Struct containing variables accessed by shared code
 254  * hash_value - Multicast address hash value
 255  */
 256 void atl1c_hash_set(struct atl1c_hw *hw, u32 hash_value)
 257 {
 258         u32 hash_bit, hash_reg;
 259         u32 mta;
 260
 261         /*
 262          * The HASH Table  is a register array of 2 32-bit registers.
 263          * It is treated like an array of 64 bits.  We want to set
 264          * bit BitArray[hash_value]. So we figure out what register
 265          * the bit is in, read it, OR in the new bit, then write
 266          * back the new value.  The register is determined by the
 267          * upper bit of the hash value and the bit within that
 268          * register are determined by the lower 5 bits of the value.
 269          */
 270         hash_reg = (hash_value >> 31) & 0x1;
 271         hash_bit = (hash_value >> 26) & 0x1F;
 272
 273         mta = AT_READ_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg);
 274
 275         mta |= (1 << hash_bit);
 276
 277         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg, mta);
 278 }
 279
 280 /*
 281  * Reads the value from a PHY register
 282  * hw - Struct containing variables accessed by shared code
 283  * reg_addr - address of the PHY register to read
 284  */
 285 int atl1c_read_phy_reg(struct atl1c_hw *hw, u16 reg_addr, u16 *phy_data)
 286 {
 287         u32 val;
 288         int i;
 289
 290         val = ((u32)(reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
 291                 MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW |
 292                 MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
 293
 294         AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
 295
 296         for (i = 0; i < MDIO_WAIT_TIMES; i++) {
 297                 udelay(2);
 298                 AT_READ_REG(hw, REG_MDIO_CTRL, &val);
 299                 if (!(val & (MDIO_START | MDIO_BUSY)))
 300                         break;
 301         }
 302         if (!(val & (MDIO_START | MDIO_BUSY))) {
 303                 *phy_data = (u16)val;
 304                 return 0;
 305         }
 306
 307         return -1;
 308 }
 309
 310 /*
 311  * Writes a value to a PHY register
 312  * hw - Struct containing variables accessed by shared code
 313  * reg_addr - address of the PHY register to write
 314  * data - data to write to the PHY
 315  */
 316 int atl1c_write_phy_reg(struct atl1c_hw *hw, u32 reg_addr, u16 phy_data)
 317 {
 318         int i;
 319         u32 val;
 320
 321         val = ((u32)(phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT   |
 322                (reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
 323                MDIO_SUP_PREAMBLE | MDIO_START |
 324                MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
 325
 326         AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
 327
 328         for (i = 0; i < MDIO_WAIT_TIMES; i++) {
 329                 udelay(2);
 330                 AT_READ_REG(hw, REG_MDIO_CTRL, &val);
 331                 if (!(val & (MDIO_START | MDIO_BUSY)))
 332                         break;
 333         }
 334
 335         if (!(val & (MDIO_START | MDIO_BUSY)))
 336                 return 0;
 337
 338         return -1;
 339 }
 340
 341 /*
 342  * Configures PHY autoneg and flow control advertisement settings
 343  *
 344  * hw - Struct containing variables accessed by shared code
 345  */
 346 static int atl1c_phy_setup_adv(struct atl1c_hw *hw)
 347 {
 348         u16 mii_adv_data = ADVERTISE_DEFAULT_CAP & ~ADVERTISE_ALL;
 349         u16 mii_giga_ctrl_data = GIGA_CR_1000T_DEFAULT_CAP &
 350                                 ~GIGA_CR_1000T_SPEED_MASK;
 351
 352         if (hw->autoneg_advertised & ADVERTISED_10baseT_Half)
 353                 mii_adv_data |= ADVERTISE_10HALF;
 354         if (hw->autoneg_advertised & ADVERTISED_10baseT_Full)
 355                 mii_adv_data |= ADVERTISE_10FULL;
 356         if (hw->autoneg_advertised & ADVERTISED_100baseT_Half)
 357                 mii_adv_data |= ADVERTISE_100HALF;
 358         if (hw->autoneg_advertised & ADVERTISED_100baseT_Full)
 359                 mii_adv_data |= ADVERTISE_100FULL;
 360
 361         if (hw->autoneg_advertised & ADVERTISED_Autoneg)
 362                 mii_adv_data |= ADVERTISE_10HALF  | ADVERTISE_10FULL |
 363                                 ADVERTISE_100HALF | ADVERTISE_100FULL;
 364
 365         if (hw->link_cap_flags & ATL1C_LINK_CAP_1000M) {
 366                 if (hw->autoneg_advertised & ADVERTISED_1000baseT_Half)
 367                         mii_giga_ctrl_data |= ADVERTISE_1000HALF;
 368                 if (hw->autoneg_advertised & ADVERTISED_1000baseT_Full)
 369                         mii_giga_ctrl_data |= ADVERTISE_1000FULL;
 370                 if (hw->autoneg_advertised & ADVERTISED_Autoneg)
 371                         mii_giga_ctrl_data |= ADVERTISE_1000HALF |
 372                                         ADVERTISE_1000FULL;
 373         }
 374
 375         if (atl1c_write_phy_reg(hw, MII_ADVERTISE, mii_adv_data) != 0 ||
 376             atl1c_write_phy_reg(hw, MII_CTRL1000, mii_giga_ctrl_data) != 0)
 377                 return -1;
 378         return 0;
 379 }
 380
 381 void atl1c_phy_disable(struct atl1c_hw *hw)
 382 {
 383         AT_WRITE_REGW(hw, REG_GPHY_CTRL,
 384                         GPHY_CTRL_PW_WOL_DIS | GPHY_CTRL_EXT_RESET);
 385 }
 386
 387 static void atl1c_phy_magic_data(struct atl1c_hw *hw)
 388 {
 389         u16 data;
 390
 391         data = ANA_LOOP_SEL_10BT | ANA_EN_MASK_TB | ANA_EN_10BT_IDLE |
 392                 ((1 & ANA_INTERVAL_SEL_TIMER_MASK) <<
 393                 ANA_INTERVAL_SEL_TIMER_SHIFT);
 394
 395         atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_18);
 396         atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 397
 398         data = (2 & ANA_SERDES_CDR_BW_MASK) | ANA_MS_PAD_DBG |
 399                 ANA_SERDES_EN_DEEM | ANA_SERDES_SEL_HSP | ANA_SERDES_EN_PLL |
 400                 ANA_SERDES_EN_LCKDT;
 401
 402         atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_5);
 403         atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 404
 405         data = (44 & ANA_LONG_CABLE_TH_100_MASK) |
 406                 ((33 & ANA_SHORT_CABLE_TH_100_MASK) <<
 407                 ANA_SHORT_CABLE_TH_100_SHIFT) | ANA_BP_BAD_LINK_ACCUM |
 408                 ANA_BP_SMALL_BW;
 409
 410         atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_54);
 411         atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 412
 413         data = (11 & ANA_IECHO_ADJ_MASK) | ((11 & ANA_IECHO_ADJ_MASK) <<
 414                 ANA_IECHO_ADJ_2_SHIFT) | ((8 & ANA_IECHO_ADJ_MASK) <<
 415                 ANA_IECHO_ADJ_1_SHIFT) | ((8 & ANA_IECHO_ADJ_MASK) <<
 416                 ANA_IECHO_ADJ_0_SHIFT);
 417
 418         atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_4);
 419         atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 420
 421         data = ANA_RESTART_CAL | ((7 & ANA_MANUL_SWICH_ON_MASK) <<
 422                 ANA_MANUL_SWICH_ON_SHIFT) | ANA_MAN_ENABLE |
 423                 ANA_SEL_HSP | ANA_EN_HB | ANA_OEN_125M;
 424
 425         atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_0);
 426         atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 427
 428         if (hw->ctrl_flags & ATL1C_HIB_DISABLE) {
 429                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_41);
 430                 if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &data) != 0)
 431                         return;
 432                 data &= ~ANA_TOP_PS_EN;
 433                 atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 434
 435                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, MII_ANA_CTRL_11);
 436                 if (atl1c_read_phy_reg(hw, MII_DBG_DATA, &data) != 0)
 437                         return;
 438                 data &= ~ANA_PS_HIB_EN;
 439                 atl1c_write_phy_reg(hw, MII_DBG_DATA, data);
 440         }
 441 }
 442
 443 int atl1c_phy_reset(struct atl1c_hw *hw)
 444 {
 445         struct atl1c_adapter *adapter = hw->adapter;
 446         struct pci_dev *pdev = adapter->pdev;
 447         u16 phy_data;
 448         u32 phy_ctrl_data = GPHY_CTRL_DEFAULT;
 449         u32 mii_ier_data = IER_LINK_UP | IER_LINK_DOWN;
 450         int err;
 451
 452         if (hw->ctrl_flags & ATL1C_HIB_DISABLE)
 453                 phy_ctrl_data &= ~GPHY_CTRL_HIB_EN;
 454
 455         AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl_data);
 456         AT_WRITE_FLUSH(hw);
 457         msleep(40);
 458         phy_ctrl_data |= GPHY_CTRL_EXT_RESET;
 459         AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl_data);
 460         AT_WRITE_FLUSH(hw);
 461         msleep(10);
 462
 463         if (hw->nic_type == athr_l2c_b) {
 464                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x0A);
 465                 atl1c_read_phy_reg(hw, MII_DBG_DATA, &phy_data);
 466                 atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data & 0xDFFF);
 467         }
 468
 469         if (hw->nic_type == athr_l2c_b ||
 470             hw->nic_type == athr_l2c_b2 ||
 471             hw->nic_type == athr_l1d ||
 472             hw->nic_type == athr_l1d_2) {
 473                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x3B);
 474                 atl1c_read_phy_reg(hw, MII_DBG_DATA, &phy_data);
 475                 atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data & 0xFFF7);
 476                 msleep(20);
 477         }
 478         if (hw->nic_type == athr_l1d) {
 479                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x29);
 480                 atl1c_write_phy_reg(hw, MII_DBG_DATA, 0x929D);
 481         }
 482         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c_b2
 483                 || hw->nic_type == athr_l2c) {
 484                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x29);
 485                 atl1c_write_phy_reg(hw, MII_DBG_DATA, 0xB6DD);
 486         }
 487         err = atl1c_write_phy_reg(hw, MII_IER, mii_ier_data);
 488         if (err) {
 489                 if (netif_msg_hw(adapter))
 490                         dev_err(&pdev->dev,
 491                                 "Error enable PHY linkChange Interrupt\n");
 492                 return err;
 493         }
 494         if (!(hw->ctrl_flags & ATL1C_FPGA_VERSION))
 495                 atl1c_phy_magic_data(hw);
 496         return 0;
 497 }
 498
 499 int atl1c_phy_init(struct atl1c_hw *hw)
 500 {
 501         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
 502         struct pci_dev *pdev = adapter->pdev;
 503         int ret_val;
 504         u16 mii_bmcr_data = BMCR_RESET;
 505
 506         if ((atl1c_read_phy_reg(hw, MII_PHYSID1, &hw->phy_id1) != 0) ||
 507                 (atl1c_read_phy_reg(hw, MII_PHYSID2, &hw->phy_id2) != 0)) {
 508                 dev_err(&pdev->dev, "Error get phy ID\n");
 509                 return -1;
 510         }
 511         switch (hw->media_type) {
 512         case MEDIA_TYPE_AUTO_SENSOR:
 513                 ret_val = atl1c_phy_setup_adv(hw);
 514                 if (ret_val) {
 515                         if (netif_msg_link(adapter))
 516                                 dev_err(&pdev->dev,
 517                                         "Error Setting up Auto-Negotiation\n");
 518                         return ret_val;
 519                 }
 520                 mii_bmcr_data |= BMCR_ANENABLE | BMCR_ANRESTART;
 521                 break;
 522         case MEDIA_TYPE_100M_FULL:
 523                 mii_bmcr_data |= BMCR_SPEED100 | BMCR_FULLDPLX;
 524                 break;
 525         case MEDIA_TYPE_100M_HALF:
 526                 mii_bmcr_data |= BMCR_SPEED100;
 527                 break;
 528         case MEDIA_TYPE_10M_FULL:
 529                 mii_bmcr_data |= BMCR_FULLDPLX;
 530                 break;
 531         case MEDIA_TYPE_10M_HALF:
 532                 break;
 533         default:
 534                 if (netif_msg_link(adapter))
 535                         dev_err(&pdev->dev, "Wrong Media type %d\n",
 536                                 hw->media_type);
 537                 return -1;
 538                 break;
 539         }
 540
 541         ret_val = atl1c_write_phy_reg(hw, MII_BMCR, mii_bmcr_data);
 542         if (ret_val)
 543                 return ret_val;
 544         hw->phy_configured = true;
 545
 546         return 0;
 547 }
 548
 549 /*
 550  * Detects the current speed and duplex settings of the hardware.
 551  *
 552  * hw - Struct containing variables accessed by shared code
 553  * speed - Speed of the connection
 554  * duplex - Duplex setting of the connection
 555  */
 556 int atl1c_get_speed_and_duplex(struct atl1c_hw *hw, u16 *speed, u16 *duplex)
 557 {
 558         int err;
 559         u16 phy_data;
 560
 561         /* Read   PHY Specific Status Register (17) */
 562         err = atl1c_read_phy_reg(hw, MII_GIGA_PSSR, &phy_data);
 563         if (err)
 564                 return err;
 565
 566         if (!(phy_data & GIGA_PSSR_SPD_DPLX_RESOLVED))
 567                 return -1;
 568
 569         switch (phy_data & GIGA_PSSR_SPEED) {
 570         case GIGA_PSSR_1000MBS:
 571                 *speed = SPEED_1000;
 572                 break;
 573         case GIGA_PSSR_100MBS:
 574                 *speed = SPEED_100;
 575                 break;
 576         case  GIGA_PSSR_10MBS:
 577                 *speed = SPEED_10;
 578                 break;
 579         default:
 580                 return -1;
 581                 break;
 582         }
 583
 584         if (phy_data & GIGA_PSSR_DPLX)
 585                 *duplex = FULL_DUPLEX;
 586         else
 587                 *duplex = HALF_DUPLEX;
 588
 589         return 0;
 590 }
 591
 592 int atl1c_phy_power_saving(struct atl1c_hw *hw)
 593 {
 594         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
 595         struct pci_dev *pdev = adapter->pdev;
 596         int ret = 0;
 597         u16 autoneg_advertised = ADVERTISED_10baseT_Half;
 598         u16 save_autoneg_advertised;
 599         u16 phy_data;
 600         u16 mii_lpa_data;
 601         u16 speed = SPEED_0;
 602         u16 duplex = FULL_DUPLEX;
 603         int i;
 604
 605         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 606         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 607         if (phy_data & BMSR_LSTATUS) {
 608                 atl1c_read_phy_reg(hw, MII_LPA, &mii_lpa_data);
 609                 if (mii_lpa_data & LPA_10FULL)
 610                         autoneg_advertised = ADVERTISED_10baseT_Full;
 611                 else if (mii_lpa_data & LPA_10HALF)
 612                         autoneg_advertised = ADVERTISED_10baseT_Half;
 613                 else if (mii_lpa_data & LPA_100HALF)
 614                         autoneg_advertised = ADVERTISED_100baseT_Half;
 615                 else if (mii_lpa_data & LPA_100FULL)
 616                         autoneg_advertised = ADVERTISED_100baseT_Full;
 617
 618                 save_autoneg_advertised = hw->autoneg_advertised;
 619                 hw->phy_configured = false;
 620                 hw->autoneg_advertised = autoneg_advertised;
 621                 if (atl1c_restart_autoneg(hw) != 0) {
 622                         dev_dbg(&pdev->dev, "phy autoneg failed\n");
 623                         ret = -1;
 624                 }
 625                 hw->autoneg_advertised = save_autoneg_advertised;
 626
 627                 if (mii_lpa_data) {
 628                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
 629                                 mdelay(100);
 630                                 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 631                                 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 632                                 if (phy_data & BMSR_LSTATUS) {
 633                                         if (atl1c_get_speed_and_duplex(hw, &speed,
 634                                                                         &duplex) != 0)
 635                                                 dev_dbg(&pdev->dev,
 636                                                         "get speed and duplex failed\n");
 637                                         break;
 638                                 }
 639                         }
 640                 }
 641         } else {
 642                 speed = SPEED_10;
 643                 duplex = HALF_DUPLEX;
 644         }
 645         adapter->link_speed = speed;
 646         adapter->link_duplex = duplex;
 647
 648         return ret;
 649 }
 650
 651 int atl1c_restart_autoneg(struct atl1c_hw *hw)
 652 {
 653         int err = 0;
 654         u16 mii_bmcr_data = BMCR_RESET;
 655
 656         err = atl1c_phy_setup_adv(hw);
 657         if (err)
 658                 return err;
 659         mii_bmcr_data |= BMCR_ANENABLE | BMCR_ANRESTART;
 660
 661         return atl1c_write_phy_reg(hw, MII_BMCR, mii_bmcr_data);
 662 }