drivers/mfd/rts5249.c

   1 /* Driver for Realtek PCI-Express card reader
   2  *
   3  * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2, or (at your option) any
   8  * later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author:
  19  *   Wei WANG <wei_wang@realsil.com.cn>
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/delay.h>
  24 #include <linux/mfd/rtsx_pci.h>
  25
  26 #include "rtsx_pcr.h"
  27
  28 static u8 rts5249_get_ic_version(struct rtsx_pcr *pcr)
  29 {
  30         u8 val;
  31
  32         rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
  33         return val & 0x0F;
  34 }
  35
  36 static void rts5249_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
  37 {
  38         u8 driving_3v3[4][3] = {
  39                 {0x11, 0x11, 0x11},
  40                 {0x55, 0x55, 0x5C},
  41                 {0x99, 0x99, 0x92},
  42                 {0x99, 0x99, 0x92},
  43         };
  44         u8 driving_1v8[4][3] = {
  45                 {0x3C, 0x3C, 0x3C},
  46                 {0xB3, 0xB3, 0xB3},
  47                 {0xFE, 0xFE, 0xFE},
  48                 {0xC4, 0xC4, 0xC4},
  49         };
  50         u8 (*driving)[3], drive_sel;
  51
  52         if (voltage == OUTPUT_3V3) {
  53                 driving = driving_3v3;
  54                 drive_sel = pcr->sd30_drive_sel_3v3;
  55         } else {
  56                 driving = driving_1v8;
  57                 drive_sel = pcr->sd30_drive_sel_1v8;
  58         }
  59
  60         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
  61                         0xFF, driving[drive_sel][0]);
  62         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
  63                         0xFF, driving[drive_sel][1]);
  64         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
  65                         0xFF, driving[drive_sel][2]);
  66 }
  67
  68 static void rts5249_fetch_vendor_settings(struct rtsx_pcr *pcr)
  69 {
  70         u32 reg;
  71
  72         rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
  73         dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
  74
  75         if (!rtsx_vendor_setting_valid(reg))
  76                 return;
  77
  78         pcr->aspm_en = rtsx_reg_to_aspm(reg);
  79         pcr->sd30_drive_sel_1v8 = rtsx_reg_to_sd30_drive_sel_1v8(reg);
  80         pcr->card_drive_sel &= 0x3F;
  81         pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
  82
  83         rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
  84         dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
  85         pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg);
  86         if (rtsx_reg_check_reverse_socket(reg))
  87                 pcr->flags |= PCR_REVERSE_SOCKET;
  88 }
  89
  90 static void rts5249_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
  91 {
  92         /* Set relink_time to 0 */
  93         rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, 0xFF, 0);
  94         rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, 0xFF, 0);
  95         rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3, 0x01, 0);
  96
  97         if (pm_state == HOST_ENTER_S3)
  98                 rtsx_pci_write_register(pcr, PM_CTRL3, 0x10, 0x10);
  99
 100         rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
 101 }
 102
 103 static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
 104 {
 105         rtsx_pci_init_cmd(pcr);
 106
 107         /* Configure GPIO as output */
 108         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
 109         /* Reset ASPM state to default value */
 110         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
 111         /* Switch LDO3318 source from DV33 to card_3v3 */
 112         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
 113         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
 114         /* LED shine disabled, set initial shine cycle period */
 115         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
 116         /* Configure driving */
 117         rts5249_fill_driving(pcr, OUTPUT_3V3);
 118         if (pcr->flags & PCR_REVERSE_SOCKET)
 119                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 120                                 AUTOLOAD_CFG_BASE + 3, 0xB0, 0xB0);
 121         else
 122                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 123                                 AUTOLOAD_CFG_BASE + 3, 0xB0, 0x80);
 124         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x10, 0x00);
 125
 126         return rtsx_pci_send_cmd(pcr, 100);
 127 }
 128
 129 static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
 130 {
 131         int err;
 132
 133         err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV,
 134                         PHY_REG_REV_RESV | PHY_REG_REV_RXIDLE_LATCHED |
 135                         PHY_REG_REV_P1_EN | PHY_REG_REV_RXIDLE_EN |
 136                         PHY_REG_REV_RX_PWST | PHY_REG_REV_CLKREQ_DLY_TIMER_1_0 |
 137                         PHY_REG_REV_STOP_CLKRD | PHY_REG_REV_STOP_CLKWR);
 138         if (err < 0)
 139                 return err;
 140
 141         msleep(1);
 142
 143         err = rtsx_pci_write_phy_register(pcr, PHY_BPCR,
 144                         PHY_BPCR_IBRXSEL | PHY_BPCR_IBTXSEL |
 145                         PHY_BPCR_IB_FILTER | PHY_BPCR_CMIRROR_EN);
 146         if (err < 0)
 147                 return err;
 148         err = rtsx_pci_write_phy_register(pcr, PHY_PCR,
 149                         PHY_PCR_FORCE_CODE | PHY_PCR_OOBS_CALI_50 |
 150                         PHY_PCR_OOBS_VCM_08 | PHY_PCR_OOBS_SEN_90 |
 151                         PHY_PCR_RSSI_EN);
 152         if (err < 0)
 153                 return err;
 154         err = rtsx_pci_write_phy_register(pcr, PHY_RCR2,
 155                         PHY_RCR2_EMPHASE_EN | PHY_RCR2_NADJR |
 156                         PHY_RCR2_CDR_CP_10 | PHY_RCR2_CDR_SR_2 |
 157                         PHY_RCR2_FREQSEL_12 | PHY_RCR2_CPADJEN |
 158                         PHY_RCR2_CDR_SC_8 | PHY_RCR2_CALIB_LATE);
 159         if (err < 0)
 160                 return err;
 161         err = rtsx_pci_write_phy_register(pcr, PHY_FLD4,
 162                         PHY_FLD4_FLDEN_SEL | PHY_FLD4_REQ_REF |
 163                         PHY_FLD4_RXAMP_OFF | PHY_FLD4_REQ_ADDA |
 164                         PHY_FLD4_BER_COUNT | PHY_FLD4_BER_TIMER |
 165                         PHY_FLD4_BER_CHK_EN);
 166         if (err < 0)
 167                 return err;
 168         err = rtsx_pci_write_phy_register(pcr, PHY_RDR, PHY_RDR_RXDSEL_1_9);
 169         if (err < 0)
 170                 return err;
 171         err = rtsx_pci_write_phy_register(pcr, PHY_RCR1,
 172                         PHY_RCR1_ADP_TIME | PHY_RCR1_VCO_COARSE);
 173         if (err < 0)
 174                 return err;
 175         err = rtsx_pci_write_phy_register(pcr, PHY_FLD3,
 176                         PHY_FLD3_TIMER_4 | PHY_FLD3_TIMER_6 |
 177                         PHY_FLD3_RXDELINK);
 178         if (err < 0)
 179                 return err;
 180         return rtsx_pci_write_phy_register(pcr, PHY_TUNE,
 181                         PHY_TUNE_TUNEREF_1_0 | PHY_TUNE_VBGSEL_1252 |
 182                         PHY_TUNE_SDBUS_33 | PHY_TUNE_TUNED18 |
 183                         PHY_TUNE_TUNED12);
 184 }
 185
 186 static int rts5249_turn_on_led(struct rtsx_pcr *pcr)
 187 {
 188         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
 189 }
 190
 191 static int rts5249_turn_off_led(struct rtsx_pcr *pcr)
 192 {
 193         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
 194 }
 195
 196 static int rts5249_enable_auto_blink(struct rtsx_pcr *pcr)
 197 {
 198         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
 199 }
 200
 201 static int rts5249_disable_auto_blink(struct rtsx_pcr *pcr)
 202 {
 203         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
 204 }
 205
 206 static int rts5249_card_power_on(struct rtsx_pcr *pcr, int card)
 207 {
 208         int err;
 209
 210         rtsx_pci_init_cmd(pcr);
 211         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 212                         SD_POWER_MASK, SD_VCC_PARTIAL_POWER_ON);
 213         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 214                         LDO3318_PWR_MASK, 0x02);
 215         err = rtsx_pci_send_cmd(pcr, 100);
 216         if (err < 0)
 217                 return err;
 218
 219         msleep(5);
 220
 221         rtsx_pci_init_cmd(pcr);
 222         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 223                         SD_POWER_MASK, SD_VCC_POWER_ON);
 224         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 225                         LDO3318_PWR_MASK, 0x06);
 226         err = rtsx_pci_send_cmd(pcr, 100);
 227         if (err < 0)
 228                 return err;
 229
 230         return 0;
 231 }
 232
 233 static int rts5249_card_power_off(struct rtsx_pcr *pcr, int card)
 234 {
 235         rtsx_pci_init_cmd(pcr);
 236         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 237                         SD_POWER_MASK, SD_POWER_OFF);
 238         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 239                         LDO3318_PWR_MASK, 0x00);
 240         return rtsx_pci_send_cmd(pcr, 100);
 241 }
 242
 243 static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 244 {
 245         int err;
 246
 247         if (voltage == OUTPUT_3V3) {
 248                 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 | 0x24);
 249                 if (err < 0)
 250                         return err;
 251         } else if (voltage == OUTPUT_1V8) {
 252                 err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
 253                 if (err < 0)
 254                         return err;
 255                 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 | 0x24);
 256                 if (err < 0)
 257                         return err;
 258         } else {
 259                 return -EINVAL;
 260         }
 261
 262         /* set pad drive */
 263         rtsx_pci_init_cmd(pcr);
 264         rts5249_fill_driving(pcr, voltage);
 265         return rtsx_pci_send_cmd(pcr, 100);
 266 }
 267
 268 static const struct pcr_ops rts5249_pcr_ops = {
 269         .fetch_vendor_settings = rts5249_fetch_vendor_settings,
 270         .extra_init_hw = rts5249_extra_init_hw,
 271         .optimize_phy = rts5249_optimize_phy,
 272         .turn_on_led = rts5249_turn_on_led,
 273         .turn_off_led = rts5249_turn_off_led,
 274         .enable_auto_blink = rts5249_enable_auto_blink,
 275         .disable_auto_blink = rts5249_disable_auto_blink,
 276         .card_power_on = rts5249_card_power_on,
 277         .card_power_off = rts5249_card_power_off,
 278         .switch_output_voltage = rts5249_switch_output_voltage,
 279         .force_power_down = rts5249_force_power_down,
 280 };
 281
 282 /* SD Pull Control Enable:
 283  *     SD_DAT[3:0] ==> pull up
 284  *     SD_CD       ==> pull up
 285  *     SD_WP       ==> pull up
 286  *     SD_CMD      ==> pull up
 287  *     SD_CLK      ==> pull down
 288  */
 289 static const u32 rts5249_sd_pull_ctl_enable_tbl[] = {
 290         RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
 291         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
 292         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
 293         RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
 294         0,
 295 };
 296
 297 /* SD Pull Control Disable:
 298  *     SD_DAT[3:0] ==> pull down
 299  *     SD_CD       ==> pull up
 300  *     SD_WP       ==> pull down
 301  *     SD_CMD      ==> pull down
 302  *     SD_CLK      ==> pull down
 303  */
 304 static const u32 rts5249_sd_pull_ctl_disable_tbl[] = {
 305         RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
 306         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
 307         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
 308         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 309         0,
 310 };
 311
 312 /* MS Pull Control Enable:
 313  *     MS CD       ==> pull up
 314  *     others      ==> pull down
 315  */
 316 static const u32 rts5249_ms_pull_ctl_enable_tbl[] = {
 317         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 318         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 319         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 320         0,
 321 };
 322
 323 /* MS Pull Control Disable:
 324  *     MS CD       ==> pull up
 325  *     others      ==> pull down
 326  */
 327 static const u32 rts5249_ms_pull_ctl_disable_tbl[] = {
 328         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 329         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 330         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 331         0,
 332 };
 333
 334 void rts5249_init_params(struct rtsx_pcr *pcr)
 335 {
 336         pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
 337         pcr->num_slots = 2;
 338         pcr->ops = &rts5249_pcr_ops;
 339
 340         pcr->flags = 0;
 341         pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
 342         pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_C;
 343         pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
 344         pcr->aspm_en = ASPM_L1_EN;
 345         pcr->tx_initial_phase = SET_CLOCK_PHASE(1, 29, 16);
 346         pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
 347
 348         pcr->ic_version = rts5249_get_ic_version(pcr);
 349         pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
 350         pcr->sd_pull_ctl_disable_tbl = rts5249_sd_pull_ctl_disable_tbl;
 351         pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
 352         pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
 353 }