drivers/net/wireless/ath/ath5k/attach.c

   1 /*
   2  * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
   3  * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  *
  17  */
  18
  19 /*************************************\
  20 * Attach/Detach Functions and helpers *
  21 \*************************************/
  22
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include "ath5k.h"
  26 #include "reg.h"
  27 #include "debug.h"
  28 #include "base.h"
  29
  30 /**
  31  * ath5k_hw_post - Power On Self Test helper function
  32  *
  33  * @ah: The &struct ath5k_hw
  34  */
  35 static int ath5k_hw_post(struct ath5k_hw *ah)
  36 {
  37
  38         static const u32 static_pattern[4] = {
  39                 0x55555555,     0xaaaaaaaa,
  40                 0x66666666,     0x99999999
  41         };
  42         static const u16 regs[2] = { AR5K_STA_ID0, AR5K_PHY(8) };
  43         int i, c;
  44         u16 cur_reg;
  45         u32 var_pattern;
  46         u32 init_val;
  47         u32 cur_val;
  48
  49         for (c = 0; c < 2; c++) {
  50
  51                 cur_reg = regs[c];
  52
  53                 /* Save previous value */
  54                 init_val = ath5k_hw_reg_read(ah, cur_reg);
  55
  56                 for (i = 0; i < 256; i++) {
  57                         var_pattern = i << 16 | i;
  58                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
  59                         cur_val = ath5k_hw_reg_read(ah, cur_reg);
  60
  61                         if (cur_val != var_pattern) {
  62                                 ATH5K_ERR(ah->ah_sc, "POST Failed !!!\n");
  63                                 return -EAGAIN;
  64                         }
  65
  66                         /* Found on ndiswrapper dumps */
  67                         var_pattern = 0x0039080f;
  68                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
  69                 }
  70
  71                 for (i = 0; i < 4; i++) {
  72                         var_pattern = static_pattern[i];
  73                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
  74                         cur_val = ath5k_hw_reg_read(ah, cur_reg);
  75
  76                         if (cur_val != var_pattern) {
  77                                 ATH5K_ERR(ah->ah_sc, "POST Failed !!!\n");
  78                                 return -EAGAIN;
  79                         }
  80
  81                         /* Found on ndiswrapper dumps */
  82                         var_pattern = 0x003b080f;
  83                         ath5k_hw_reg_write(ah, var_pattern, cur_reg);
  84                 }
  85
  86                 /* Restore previous value */
  87                 ath5k_hw_reg_write(ah, init_val, cur_reg);
  88
  89         }
  90
  91         return 0;
  92
  93 }
  94
  95 /**
  96  * ath5k_hw_attach - Check if hw is supported and init the needed structs
  97  *
  98  * @sc: The &struct ath5k_softc we got from the driver's attach function
  99  *
 100  * Check if the device is supported, perform a POST and initialize the needed
 101  * structs. Returns -ENOMEM if we don't have memory for the needed structs,
 102  * -ENODEV if the device is not supported or prints an error msg if something
 103  * else went wrong.
 104  */
 105 int ath5k_hw_attach(struct ath5k_softc *sc)
 106 {
 107         struct ath5k_hw *ah = sc->ah;
 108         struct ath_common *common = ath5k_hw_common(ah);
 109         struct pci_dev *pdev = sc->pdev;
 110         struct ath5k_eeprom_info *ee;
 111         int ret;
 112         u32 srev;
 113
 114         /*
 115          * HW information
 116          */
 117         ah->ah_op_mode = NL80211_IFTYPE_STATION;
 118         ah->ah_radar.r_enabled = AR5K_TUNE_RADAR_ALERT;
 119         ah->ah_turbo = false;
 120         ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
 121         ah->ah_imr = 0;
 122         ah->ah_atim_window = 0;
 123         ah->ah_aifs = AR5K_TUNE_AIFS;
 124         ah->ah_cw_min = AR5K_TUNE_CWMIN;
 125         ah->ah_limit_tx_retries = AR5K_INIT_TX_RETRY;
 126         ah->ah_software_retry = false;
 127
 128         /*
 129          * Find the mac version
 130          */
 131         srev = ath5k_hw_reg_read(ah, AR5K_SREV);
 132         if (srev < AR5K_SREV_AR5311)
 133                 ah->ah_version = AR5K_AR5210;
 134         else if (srev < AR5K_SREV_AR5212)
 135                 ah->ah_version = AR5K_AR5211;
 136         else
 137                 ah->ah_version = AR5K_AR5212;
 138
 139         /*Fill the ath5k_hw struct with the needed functions*/
 140         ret = ath5k_hw_init_desc_functions(ah);
 141         if (ret)
 142                 goto err_free;
 143
 144         /* Bring device out of sleep and reset it's units */
 145         ret = ath5k_hw_nic_wakeup(ah, 0, true);
 146         if (ret)
 147                 goto err_free;
 148
 149         /* Get MAC, PHY and RADIO revisions */
 150         ah->ah_mac_srev = srev;
 151         ah->ah_mac_version = AR5K_REG_MS(srev, AR5K_SREV_VER);
 152         ah->ah_mac_revision = AR5K_REG_MS(srev, AR5K_SREV_REV);
 153         ah->ah_phy_revision = ath5k_hw_reg_read(ah, AR5K_PHY_CHIP_ID) &
 154                         0xffffffff;
 155         ah->ah_radio_5ghz_revision = ath5k_hw_radio_revision(ah,
 156                         CHANNEL_5GHZ);
 157         ah->ah_phy = AR5K_PHY(0);
 158
 159         /* Try to identify radio chip based on it's srev */
 160         switch (ah->ah_radio_5ghz_revision & 0xf0) {
 161         case AR5K_SREV_RAD_5111:
 162                 ah->ah_radio = AR5K_RF5111;
 163                 ah->ah_single_chip = false;
 164                 ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
 165                                                         CHANNEL_2GHZ);
 166                 break;
 167         case AR5K_SREV_RAD_5112:
 168         case AR5K_SREV_RAD_2112:
 169                 ah->ah_radio = AR5K_RF5112;
 170                 ah->ah_single_chip = false;
 171                 ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
 172                                                         CHANNEL_2GHZ);
 173                 break;
 174         case AR5K_SREV_RAD_2413:
 175                 ah->ah_radio = AR5K_RF2413;
 176                 ah->ah_single_chip = true;
 177                 break;
 178         case AR5K_SREV_RAD_5413:
 179                 ah->ah_radio = AR5K_RF5413;
 180                 ah->ah_single_chip = true;
 181                 break;
 182         case AR5K_SREV_RAD_2316:
 183                 ah->ah_radio = AR5K_RF2316;
 184                 ah->ah_single_chip = true;
 185                 break;
 186         case AR5K_SREV_RAD_2317:
 187                 ah->ah_radio = AR5K_RF2317;
 188                 ah->ah_single_chip = true;
 189                 break;
 190         case AR5K_SREV_RAD_5424:
 191                 if (ah->ah_mac_version == AR5K_SREV_AR2425 ||
 192                 ah->ah_mac_version == AR5K_SREV_AR2417){
 193                         ah->ah_radio = AR5K_RF2425;
 194                         ah->ah_single_chip = true;
 195                 } else {
 196                         ah->ah_radio = AR5K_RF5413;
 197                         ah->ah_single_chip = true;
 198                 }
 199                 break;
 200         default:
 201                 /* Identify radio based on mac/phy srev */
 202                 if (ah->ah_version == AR5K_AR5210) {
 203                         ah->ah_radio = AR5K_RF5110;
 204                         ah->ah_single_chip = false;
 205                 } else if (ah->ah_version == AR5K_AR5211) {
 206                         ah->ah_radio = AR5K_RF5111;
 207                         ah->ah_single_chip = false;
 208                         ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
 209                                                                 CHANNEL_2GHZ);
 210                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4) ||
 211                 ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4) ||
 212                 ah->ah_phy_revision == AR5K_SREV_PHY_2425) {
 213                         ah->ah_radio = AR5K_RF2425;
 214                         ah->ah_single_chip = true;
 215                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2425;
 216                 } else if (srev == AR5K_SREV_AR5213A &&
 217                 ah->ah_phy_revision == AR5K_SREV_PHY_5212B) {
 218                         ah->ah_radio = AR5K_RF5112;
 219                         ah->ah_single_chip = false;
 220                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5112B;
 221                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2415 >> 4)) {
 222                         ah->ah_radio = AR5K_RF2316;
 223                         ah->ah_single_chip = true;
 224                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2316;
 225                 } else if (ah->ah_mac_version == (AR5K_SREV_AR5414 >> 4) ||
 226                 ah->ah_phy_revision == AR5K_SREV_PHY_5413) {
 227                         ah->ah_radio = AR5K_RF5413;
 228                         ah->ah_single_chip = true;
 229                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5413;
 230                 } else if (ah->ah_mac_version == (AR5K_SREV_AR2414 >> 4) ||
 231                 ah->ah_phy_revision == AR5K_SREV_PHY_2413) {
 232                         ah->ah_radio = AR5K_RF2413;
 233                         ah->ah_single_chip = true;
 234                         ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2413;
 235                 } else {
 236                         ATH5K_ERR(sc, "Couldn't identify radio revision.\n");
 237                         ret = -ENODEV;
 238                         goto err_free;
 239                 }
 240         }
 241
 242
 243         /* Return on unsuported chips (unsupported eeprom etc) */
 244         if ((srev >= AR5K_SREV_AR5416) &&
 245         (srev < AR5K_SREV_AR2425)) {
 246                 ATH5K_ERR(sc, "Device not yet supported.\n");
 247                 ret = -ENODEV;
 248                 goto err_free;
 249         }
 250
 251         /*
 252          * POST
 253          */
 254         ret = ath5k_hw_post(ah);
 255         if (ret)
 256                 goto err_free;
 257
 258         /* Enable pci core retry fix on Hainan (5213A) and later chips */
 259         if (srev >= AR5K_SREV_AR5213A)
 260                 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_RETRY_FIX);
 261
 262         /*
 263          * Get card capabilities, calibration values etc
 264          * TODO: EEPROM work
 265          */
 266         ret = ath5k_eeprom_init(ah);
 267         if (ret) {
 268                 ATH5K_ERR(sc, "unable to init EEPROM\n");
 269                 goto err_free;
 270         }
 271
 272         ee = &ah->ah_capabilities.cap_eeprom;
 273
 274         /*
 275          * Write PCI-E power save settings
 276          */
 277         if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) {
 278                 ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
 279                 ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
 280
 281                 /* Shut off RX when elecidle is asserted */
 282                 ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES);
 283                 ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES);
 284
 285                 /* If serdes programing is enabled, increase PCI-E
 286                  * tx power for systems with long trace from host
 287                  * to minicard connector. */
 288                 if (ee->ee_serdes)
 289                         ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES);
 290                 else
 291                         ath5k_hw_reg_write(ah, 0xf6800579, AR5K_PCIE_SERDES);
 292
 293                 /* Shut off PLL and CLKREQ active in L1 */
 294                 ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES);
 295
 296                 /* Preserve other settings */
 297                 ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES);
 298                 ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES);
 299                 ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES);
 300
 301                 /* Reset SERDES to load new settings */
 302                 ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET);
 303                 mdelay(1);
 304         }
 305
 306         /* Get misc capabilities */
 307         ret = ath5k_hw_set_capabilities(ah);
 308         if (ret) {
 309                 ATH5K_ERR(sc, "unable to get device capabilities: 0x%04x\n",
 310                         sc->pdev->device);
 311                 goto err_free;
 312         }
 313
 314         /* Crypto settings */
 315         ah->ah_aes_support = srev >= AR5K_SREV_AR5212_V4 &&
 316                 (ee->ee_version >= AR5K_EEPROM_VERSION_5_0 &&
 317                  !AR5K_EEPROM_AES_DIS(ee->ee_misc5));
 318
 319         if (srev >= AR5K_SREV_AR2414) {
 320                 ah->ah_combined_mic = true;
 321                 AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,
 322                         AR5K_MISC_MODE_COMBINED_MIC);
 323         }
 324
 325         /* MAC address is cleared until add_interface */
 326         ath5k_hw_set_lladdr(ah, (u8[ETH_ALEN]){});
 327
 328         /* Set BSSID to bcast address: ff:ff:ff:ff:ff:ff for now */
 329         memcpy(common->curbssid, ath_bcast_mac, ETH_ALEN);
 330         ath5k_hw_set_associd(ah);
 331         ath5k_hw_set_opmode(ah);
 332
 333         ath5k_hw_rfgain_opt_init(ah);
 334
 335         ath5k_hw_init_nfcal_hist(ah);
 336
 337         /* turn on HW LEDs */
 338         ath5k_hw_set_ledstate(ah, AR5K_LED_INIT);
 339
 340         return 0;
 341 err_free:
 342         kfree(ah);
 343         return ret;
 344 }
 345
 346 /**
 347  * ath5k_hw_detach - Free the ath5k_hw struct
 348  *
 349  * @ah: The &struct ath5k_hw
 350  */
 351 void ath5k_hw_detach(struct ath5k_hw *ah)
 352 {
 353         ATH5K_TRACE(ah->ah_sc);
 354
 355         __set_bit(ATH_STAT_INVALID, ah->ah_sc->status);
 356
 357         if (ah->ah_rf_banks != NULL)
 358                 kfree(ah->ah_rf_banks);
 359
 360         ath5k_eeprom_detach(ah);
 361
 362         /* assume interrupts are down */
 363 }