LXR linux/drivers/staging/rtl8723bs/core/rtw

   1/******************************************************************************
   2 *
   3 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of version 2 of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12 * more details.
  13 *
  14 ******************************************************************************/
  15#define _RTW_EEPROM_C_
  16
  17#include <drv_conf.h>
  18#include <osdep_service.h>
  19#include <drv_types.h>
  20
  21void up_clk(_adapter *padapter,  u16 *x)
  22{
  23_func_enter_;
  24        *x = *x | _EESK;
  25        rtw_write8(padapter, EE_9346CR, (u8)*x);
  26        udelay(CLOCK_RATE);
  27
  28_func_exit_;
  29
  30}
  31
  32void down_clk(_adapter *padapter, u16 *x)
  33{
  34_func_enter_;
  35        *x = *x & ~_EESK;
  36        rtw_write8(padapter, EE_9346CR, (u8)*x);
  37        udelay(CLOCK_RATE);
  38_func_exit_;
  39}
  40
  41void shift_out_bits(_adapter *padapter, u16 data, u16 count)
  42{
  43        u16 x, mask;
  44_func_enter_;
  45
  46        if (padapter->bSurpriseRemoved == true) {
  47                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
  48                goto out;
  49        }
  50        mask = 0x01 << (count - 1);
  51        x = rtw_read8(padapter, EE_9346CR);
  52
  53        x &= ~(_EEDO | _EEDI);
  54
  55        do {
  56                x &= ~_EEDI;
  57                if (data & mask)
  58                        x |= _EEDI;
  59                if (padapter->bSurpriseRemoved == true) {
  60                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
  61                goto out;
  62                }
  63                rtw_write8(padapter, EE_9346CR, (u8)x);
  64                udelay(CLOCK_RATE);
  65                up_clk(padapter, &x);
  66                down_clk(padapter, &x);
  67                mask = mask >> 1;
  68        } while (mask);
  69        if (padapter->bSurpriseRemoved == true) {
  70                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
  71                goto out;
  72        }
  73        x &= ~_EEDI;
  74        rtw_write8(padapter, EE_9346CR, (u8)x);
  75out:
  76_func_exit_;
  77}
  78
  79u16 shift_in_bits(_adapter *padapter)
  80{
  81        u16 x, d = 0, i;
  82_func_enter_;
  83        if (padapter->bSurpriseRemoved == true) {
  84                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
  85                goto out;
  86        }
  87        x = rtw_read8(padapter, EE_9346CR);
  88
  89        x &= ~(_EEDO | _EEDI);
  90        d = 0;
  91
  92        for (i = 0; i < 16; i++) {
  93                d = d << 1;
  94                up_clk(padapter, &x);
  95        if (padapter->bSurpriseRemoved == true) {
  96                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
  97                goto out;
  98        }
  99                x = rtw_read8(padapter, EE_9346CR);
 100
 101                x &= ~(_EEDI);
 102                if (x & _EEDO)
 103                d |= 1;
 104
 105                down_clk(padapter, &x);
 106        }
 107out:
 108_func_exit_;
 109
 110        return d;
 111}
 112
 113void standby(_adapter *padapter)
 114{
 115        u8   x;
 116_func_enter_;
 117        x = rtw_read8(padapter, EE_9346CR);
 118
 119        x &= ~(_EECS | _EESK);
 120        rtw_write8(padapter, EE_9346CR, x);
 121
 122        udelay(CLOCK_RATE);
 123        x |= _EECS;
 124        rtw_write8(padapter, EE_9346CR, x);
 125        udelay(CLOCK_RATE);
 126_func_exit_;
 127}
 128
 129u16 wait_eeprom_cmd_done(_adapter *padapter)
 130{
 131        u8 x;
 132        u16 i, res = false;
 133_func_enter_;
 134        standby(padapter);
 135        for (i = 0; i < 200; i++) {
 136                x = rtw_read8(padapter, EE_9346CR);
 137                if (x & _EEDO) {
 138                        res = true;
 139                        goto exit;
 140                        }
 141                udelay(CLOCK_RATE);
 142        }
 143exit:
 144_func_exit_;
 145        return res;
 146}
 147
 148void eeprom_clean(_adapter *padapter)
 149{
 150        u16 x;
 151_func_enter_;
 152        if (padapter->bSurpriseRemoved == true) {
 153                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 154                goto out;
 155        }
 156        x = rtw_read8(padapter, EE_9346CR);
 157        if (padapter->bSurpriseRemoved == true) {
 158                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 159                goto out;
 160        }
 161        x &= ~(_EECS | _EEDI);
 162        rtw_write8(padapter, EE_9346CR, (u8)x);
 163        if (padapter->bSurpriseRemoved == true) {
 164                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 165                goto out;
 166        }
 167        up_clk(padapter, &x);
 168                if (padapter->bSurpriseRemoved == true) {
 169                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 170                goto out;
 171        }
 172        down_clk(padapter, &x);
 173out:
 174_func_exit_;
 175}
 176
 177void eeprom_write16(_adapter *padapter, u16 reg, u16 data)
 178{
 179        u8 x;
 180
 181_func_enter_;
 182
 183        x = rtw_read8(padapter, EE_9346CR);
 184
 185        x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
 186        x |= _EEM1 | _EECS;
 187        rtw_write8(padapter, EE_9346CR, x);
 188
 189        shift_out_bits(padapter, EEPROM_EWEN_OPCODE, 5);
 190
 191        if (padapter->EepromAddressSize == 8)   /*CF+ and SDIO*/
 192                shift_out_bits(padapter, 0, 6);
 193        else                                                                    /*USB*/
 194                shift_out_bits(padapter, 0, 4);
 195
 196        standby(padapter);
 197
 198/* Commented out by rcnjko, 2004.0
 199*        Erase this particular word.  Write the erase opcode and register
 200*        number in that order. The opcode is 3bits in length; reg is 6 bits long.
 201*       shift_out_bits(Adapter, EEPROM_ERASE_OPCODE, 3);
 202*       shift_out_bits(Adapter, reg, Adapter->EepromAddressSize);
 203*
 204*       if (wait_eeprom_cmd_done(Adapter ) == false)
 205*       {
 206*               return;
 207*       }
 208*/
 209
 210        standby(padapter);
 211
 212        /* write the new word to the EEPROM*/
 213
 214        /* send the write opcode the EEPORM*/
 215        shift_out_bits(padapter, EEPROM_WRITE_OPCODE, 3);
 216
 217        /* select which word in the EEPROM that we are writing to.*/
 218        shift_out_bits(padapter, reg, padapter->EepromAddressSize);
 219
 220        /* write the data to the selected EEPROM word.*/
 221        shift_out_bits(padapter, data, 16);
 222
 223        if (wait_eeprom_cmd_done(padapter) == false) {
 224
 225                goto exit;
 226        }
 227
 228        standby(padapter);
 229
 230        shift_out_bits(padapter, EEPROM_EWDS_OPCODE, 5);
 231        shift_out_bits(padapter, reg, 4);
 232
 233        eeprom_clean(padapter);
 234exit:
 235_func_exit_;
 236        return;
 237}
 238
 239u16 eeprom_read16(_adapter *padapter, u16 reg) /*ReadEEprom*/
 240{
 241
 242        u16 x;
 243        u16 data = 0;
 244
 245_func_enter_;
 246
 247        if (padapter->bSurpriseRemoved == true) {
 248                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 249                goto out;
 250        }
 251        /* select EEPROM, reset bits, set _EECS*/
 252        x = rtw_read8(padapter, EE_9346CR);
 253
 254        if (padapter->bSurpriseRemoved == true) {
 255                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 256                goto out;
 257        }
 258
 259        x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
 260        x |= _EEM1 | _EECS;
 261        rtw_write8(padapter, EE_9346CR, (unsigned char)x);
 262
 263        /* write the read opcode and register number in that order*/
 264        /* The opcode is 3bits in length, reg is 6 bits long*/
 265        shift_out_bits(padapter, EEPROM_READ_OPCODE, 3);
 266        shift_out_bits(padapter, reg, padapter->EepromAddressSize);
 267
 268        /* Now read the data (16 bits) in from the selected EEPROM word*/
 269        data = shift_in_bits(padapter);
 270
 271        eeprom_clean(padapter);
 272out:
 273_func_exit_;
 274        return data;
 275
 276
 277}
 278
 279
 280
 281
 282/*From even offset*/
 283void eeprom_read_sz(_adapter *padapter, u16 reg, u8 *data, u32 sz)
 284{
 285
 286        u16 x, data16;
 287        u32 i;
 288_func_enter_;
 289        if (padapter->bSurpriseRemoved == true) {
 290                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 291                goto out;
 292        }
 293        /* select EEPROM, reset bits, set _EECS*/
 294        x = rtw_read8(padapter, EE_9346CR);
 295
 296        if (padapter->bSurpriseRemoved == true) {
 297                RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
 298                goto out;
 299        }
 300
 301        x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
 302        x |= _EEM1 | _EECS;
 303        rtw_write8(padapter, EE_9346CR, (unsigned char)x);
 304
 305        /* write the read opcode and register number in that order*/
 306        /* The opcode is 3bits in length, reg is 6 bits long*/
 307        shift_out_bits(padapter, EEPROM_READ_OPCODE, 3);
 308        shift_out_bits(padapter, reg, padapter->EepromAddressSize);
 309
 310
 311        for (i = 0; i < sz; i += 2) {
 312                data16 = shift_in_bits(padapter);
 313                data[i] = data16 & 0xff;
 314                data[i+1] = data16 >> 8;
 315        }
 316
 317        eeprom_clean(padapter);
 318out:
 319_func_exit_;
 320
 321
 322
 323}
 324
 325
 326/*addr_off : address offset of the entry in eeprom (not the tuple number of eeprom (reg); that is addr_off !=reg)*/
 327u8 eeprom_read(_adapter *padapter, u32 addr_off, u8 sz, u8 *rbuf)
 328{
 329        u8 quotient, remainder, addr_2align_odd;
 330        u16 reg, stmp, i = 0, idx = 0;
 331_func_enter_;
 332        reg = (u16)(addr_off >> 1);
 333        addr_2align_odd = (u8)(addr_off & 0x1);
 334
 335        /*read that start at high part: e.g  1,3,5,7,9,...*/
 336        if (addr_2align_odd) {
 337                stmp = eeprom_read16(padapter, reg);
 338                rbuf[idx++] = (u8) ((stmp>>8)&0xff); /*return hogh-part of the short*/
 339                reg++; sz--;
 340        }
 341
 342        quotient = sz >> 1;
 343        remainder = sz & 0x1;
 344
 345        for (i = 0; i < quotient; i++) {
 346                stmp = eeprom_read16(padapter, reg+i);
 347                rbuf[idx++] = (u8) (stmp&0xff);
 348                rbuf[idx++] = (u8) ((stmp>>8)&0xff);
 349        }
 350
 351        reg = reg+i;
 352        if (remainder) { /*end of read at lower part of short : 0,2,4,6,...*/
 353                stmp = eeprom_read16(padapter, reg);
 354                rbuf[idx] = (u8)(stmp & 0xff);
 355        }
 356_func_exit_;
 357        return true;
 358}
 359
 360
 361
 362void read_eeprom_content(_adapter *padapter)
 363{
 364
 365_func_enter_;
 366
 367
 368_func_exit_;
 369}
 370