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, 0x18},
  40                 {0x55, 0x55, 0x5C},
  41                 {0xFF, 0xFF, 0xFF},
  42                 {0x96, 0x96, 0x96},
  43         };
  44         u8 driving_1v8[4][3] = {
  45                 {0xC4, 0xC4, 0xC4},
  46                 {0x3C, 0x3C, 0x3C},
  47                 {0xFE, 0xFE, 0xFE},
  48                 {0xB3, 0xB3, 0xB3},
  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, PETXCFG, 0xB0, 0xB0);
 120         else
 121                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0xB0, 0x80);
 122         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x10, 0x00);
 123
 124         return rtsx_pci_send_cmd(pcr, 100);
 125 }
 126
 127 static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
 128 {
 129         int err;
 130
 131         err = rtsx_gops_pm_reset(pcr);
 132         if (err < 0)
 133                 return err;
 134
 135         err = rtsx_pci_write_phy_register(pcr, PHY_REV,
 136                         PHY_REV_RESV | PHY_REV_RXIDLE_LATCHED |
 137                         PHY_REV_P1_EN | PHY_REV_RXIDLE_EN |
 138                         PHY_REV_CLKREQ_TX_EN | PHY_REV_RX_PWST |
 139                         PHY_REV_CLKREQ_DT_1_0 | PHY_REV_STOP_CLKRD |
 140                         PHY_REV_STOP_CLKWR);
 141         if (err < 0)
 142                 return err;
 143
 144         msleep(1);
 145
 146         err = rtsx_pci_write_phy_register(pcr, PHY_BPCR,
 147                         PHY_BPCR_IBRXSEL | PHY_BPCR_IBTXSEL |
 148                         PHY_BPCR_IB_FILTER | PHY_BPCR_CMIRROR_EN);
 149         if (err < 0)
 150                 return err;
 151
 152         err = rtsx_pci_write_phy_register(pcr, PHY_PCR,
 153                         PHY_PCR_FORCE_CODE | PHY_PCR_OOBS_CALI_50 |
 154                         PHY_PCR_OOBS_VCM_08 | PHY_PCR_OOBS_SEN_90 |
 155                         PHY_PCR_RSSI_EN | PHY_PCR_RX10K);
 156         if (err < 0)
 157                 return err;
 158
 159         err = rtsx_pci_write_phy_register(pcr, PHY_RCR2,
 160                         PHY_RCR2_EMPHASE_EN | PHY_RCR2_NADJR |
 161                         PHY_RCR2_CDR_SR_2 | PHY_RCR2_FREQSEL_12 |
 162                         PHY_RCR2_CDR_SC_12P | PHY_RCR2_CALIB_LATE);
 163         if (err < 0)
 164                 return err;
 165
 166         err = rtsx_pci_write_phy_register(pcr, PHY_FLD4,
 167                         PHY_FLD4_FLDEN_SEL | PHY_FLD4_REQ_REF |
 168                         PHY_FLD4_RXAMP_OFF | PHY_FLD4_REQ_ADDA |
 169                         PHY_FLD4_BER_COUNT | PHY_FLD4_BER_TIMER |
 170                         PHY_FLD4_BER_CHK_EN);
 171         if (err < 0)
 172                 return err;
 173         err = rtsx_pci_write_phy_register(pcr, PHY_RDR,
 174                         PHY_RDR_RXDSEL_1_9 | PHY_SSC_AUTO_PWD);
 175         if (err < 0)
 176                 return err;
 177         err = rtsx_pci_write_phy_register(pcr, PHY_RCR1,
 178                         PHY_RCR1_ADP_TIME_4 | PHY_RCR1_VCO_COARSE);
 179         if (err < 0)
 180                 return err;
 181         err = rtsx_pci_write_phy_register(pcr, PHY_FLD3,
 182                         PHY_FLD3_TIMER_4 | PHY_FLD3_TIMER_6 |
 183                         PHY_FLD3_RXDELINK);
 184         if (err < 0)
 185                 return err;
 186
 187         return rtsx_pci_write_phy_register(pcr, PHY_TUNE,
 188                         PHY_TUNE_TUNEREF_1_0 | PHY_TUNE_VBGSEL_1252 |
 189                         PHY_TUNE_SDBUS_33 | PHY_TUNE_TUNED18 |
 190                         PHY_TUNE_TUNED12 | PHY_TUNE_TUNEA12);
 191 }
 192
 193 static int rts5249_turn_on_led(struct rtsx_pcr *pcr)
 194 {
 195         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
 196 }
 197
 198 static int rts5249_turn_off_led(struct rtsx_pcr *pcr)
 199 {
 200         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
 201 }
 202
 203 static int rts5249_enable_auto_blink(struct rtsx_pcr *pcr)
 204 {
 205         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
 206 }
 207
 208 static int rts5249_disable_auto_blink(struct rtsx_pcr *pcr)
 209 {
 210         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
 211 }
 212
 213 static int rts5249_card_power_on(struct rtsx_pcr *pcr, int card)
 214 {
 215         int err;
 216
 217         rtsx_pci_init_cmd(pcr);
 218         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 219                         SD_POWER_MASK, SD_VCC_PARTIAL_POWER_ON);
 220         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 221                         LDO3318_PWR_MASK, 0x02);
 222         err = rtsx_pci_send_cmd(pcr, 100);
 223         if (err < 0)
 224                 return err;
 225
 226         msleep(5);
 227
 228         rtsx_pci_init_cmd(pcr);
 229         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 230                         SD_POWER_MASK, SD_VCC_POWER_ON);
 231         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 232                         LDO3318_PWR_MASK, 0x06);
 233         err = rtsx_pci_send_cmd(pcr, 100);
 234         if (err < 0)
 235                 return err;
 236
 237         return 0;
 238 }
 239
 240 static int rts5249_card_power_off(struct rtsx_pcr *pcr, int card)
 241 {
 242         rtsx_pci_init_cmd(pcr);
 243         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 244                         SD_POWER_MASK, SD_POWER_OFF);
 245         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 246                         LDO3318_PWR_MASK, 0x00);
 247         return rtsx_pci_send_cmd(pcr, 100);
 248 }
 249
 250 static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 251 {
 252         int err;
 253
 254         if (voltage == OUTPUT_3V3) {
 255                 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 | 0x24);
 256                 if (err < 0)
 257                         return err;
 258         } else if (voltage == OUTPUT_1V8) {
 259                 err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
 260                 if (err < 0)
 261                         return err;
 262                 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 | 0x24);
 263                 if (err < 0)
 264                         return err;
 265         } else {
 266                 return -EINVAL;
 267         }
 268
 269         /* set pad drive */
 270         rtsx_pci_init_cmd(pcr);
 271         rts5249_fill_driving(pcr, voltage);
 272         return rtsx_pci_send_cmd(pcr, 100);
 273 }
 274
 275 static const struct pcr_ops rts5249_pcr_ops = {
 276         .fetch_vendor_settings = rts5249_fetch_vendor_settings,
 277         .extra_init_hw = rts5249_extra_init_hw,
 278         .optimize_phy = rts5249_optimize_phy,
 279         .turn_on_led = rts5249_turn_on_led,
 280         .turn_off_led = rts5249_turn_off_led,
 281         .enable_auto_blink = rts5249_enable_auto_blink,
 282         .disable_auto_blink = rts5249_disable_auto_blink,
 283         .card_power_on = rts5249_card_power_on,
 284         .card_power_off = rts5249_card_power_off,
 285         .switch_output_voltage = rts5249_switch_output_voltage,
 286         .force_power_down = rts5249_force_power_down,
 287 };
 288
 289 /* SD Pull Control Enable:
 290  *     SD_DAT[3:0] ==> pull up
 291  *     SD_CD       ==> pull up
 292  *     SD_WP       ==> pull up
 293  *     SD_CMD      ==> pull up
 294  *     SD_CLK      ==> pull down
 295  */
 296 static const u32 rts5249_sd_pull_ctl_enable_tbl[] = {
 297         RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
 298         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
 299         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
 300         RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
 301         0,
 302 };
 303
 304 /* SD Pull Control Disable:
 305  *     SD_DAT[3:0] ==> pull down
 306  *     SD_CD       ==> pull up
 307  *     SD_WP       ==> pull down
 308  *     SD_CMD      ==> pull down
 309  *     SD_CLK      ==> pull down
 310  */
 311 static const u32 rts5249_sd_pull_ctl_disable_tbl[] = {
 312         RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
 313         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
 314         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
 315         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 316         0,
 317 };
 318
 319 /* MS Pull Control Enable:
 320  *     MS CD       ==> pull up
 321  *     others      ==> pull down
 322  */
 323 static const u32 rts5249_ms_pull_ctl_enable_tbl[] = {
 324         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 325         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 326         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 327         0,
 328 };
 329
 330 /* MS Pull Control Disable:
 331  *     MS CD       ==> pull up
 332  *     others      ==> pull down
 333  */
 334 static const u32 rts5249_ms_pull_ctl_disable_tbl[] = {
 335         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 336         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 337         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 338         0,
 339 };
 340
 341 void rts5249_init_params(struct rtsx_pcr *pcr)
 342 {
 343         pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
 344         pcr->num_slots = 2;
 345         pcr->ops = &rts5249_pcr_ops;
 346
 347         pcr->flags = 0;
 348         pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
 349         pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
 350         pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
 351         pcr->aspm_en = ASPM_L1_EN;
 352         pcr->tx_initial_phase = SET_CLOCK_PHASE(1, 29, 16);
 353         pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
 354
 355         pcr->ic_version = rts5249_get_ic_version(pcr);
 356         pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
 357         pcr->sd_pull_ctl_disable_tbl = rts5249_sd_pull_ctl_disable_tbl;
 358         pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
 359         pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
 360 }