drivers/misc/cardreader/rts5209.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Driver for Realtek PCI-Express card reader
   3  *
   4  * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
   5  *
   6  * Author:
   7  *   Wei WANG <wei_wang@realsil.com.cn>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/delay.h>
  12 #include <linux/rtsx_pci.h>
  13
  14 #include "rtsx_pcr.h"
  15
  16 static u8 rts5209_get_ic_version(struct rtsx_pcr *pcr)
  17 {
  18         u8 val;
  19
  20         val = rtsx_pci_readb(pcr, 0x1C);
  21         return val & 0x0F;
  22 }
  23
  24 static void rts5209_fetch_vendor_settings(struct rtsx_pcr *pcr)
  25 {
  26         struct pci_dev *pdev = pcr->pci;
  27         u32 reg;
  28
  29         pci_read_config_dword(pdev, PCR_SETTING_REG1, &reg);
  30         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
  31
  32         if (rts5209_vendor_setting1_valid(reg)) {
  33                 if (rts5209_reg_check_ms_pmos(reg))
  34                         pcr->flags |= PCR_MS_PMOS;
  35                 pcr->aspm_en = rts5209_reg_to_aspm(reg);
  36         }
  37
  38         pci_read_config_dword(pdev, PCR_SETTING_REG2, &reg);
  39         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
  40
  41         if (rts5209_vendor_setting2_valid(reg)) {
  42                 pcr->sd30_drive_sel_1v8 =
  43                         rts5209_reg_to_sd30_drive_sel_1v8(reg);
  44                 pcr->sd30_drive_sel_3v3 =
  45                         rts5209_reg_to_sd30_drive_sel_3v3(reg);
  46                 pcr->card_drive_sel = rts5209_reg_to_card_drive_sel(reg);
  47         }
  48 }
  49
  50 static void rts5209_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
  51 {
  52         rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07);
  53 }
  54
  55 static int rts5209_extra_init_hw(struct rtsx_pcr *pcr)
  56 {
  57         rtsx_pci_init_cmd(pcr);
  58
  59         /* Turn off LED */
  60         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO, 0xFF, 0x03);
  61         /* Reset ASPM state to default value */
  62         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
  63         /* Force CLKREQ# PIN to drive 0 to request clock */
  64         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
  65         /* Configure GPIO as output */
  66         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
  67         /* Configure driving */
  68         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
  69                         0xFF, pcr->sd30_drive_sel_3v3);
  70
  71         return rtsx_pci_send_cmd(pcr, 100);
  72 }
  73
  74 static int rts5209_optimize_phy(struct rtsx_pcr *pcr)
  75 {
  76         return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966);
  77 }
  78
  79 static int rts5209_turn_on_led(struct rtsx_pcr *pcr)
  80 {
  81         return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
  82 }
  83
  84 static int rts5209_turn_off_led(struct rtsx_pcr *pcr)
  85 {
  86         return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
  87 }
  88
  89 static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr)
  90 {
  91         return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
  92 }
  93
  94 static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr)
  95 {
  96         return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
  97 }
  98
  99 static int rts5209_card_power_on(struct rtsx_pcr *pcr, int card)
 100 {
 101         int err;
 102         u8 pwr_mask, partial_pwr_on, pwr_on;
 103
 104         pwr_mask = SD_POWER_MASK;
 105         partial_pwr_on = SD_PARTIAL_POWER_ON;
 106         pwr_on = SD_POWER_ON;
 107
 108         if ((pcr->flags & PCR_MS_PMOS) && (card == RTSX_MS_CARD)) {
 109                 pwr_mask = MS_POWER_MASK;
 110                 partial_pwr_on = MS_PARTIAL_POWER_ON;
 111                 pwr_on = MS_POWER_ON;
 112         }
 113
 114         rtsx_pci_init_cmd(pcr);
 115         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 116                         pwr_mask, partial_pwr_on);
 117         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 118                         LDO3318_PWR_MASK, 0x04);
 119         err = rtsx_pci_send_cmd(pcr, 100);
 120         if (err < 0)
 121                 return err;
 122
 123         /* To avoid too large in-rush current */
 124         udelay(150);
 125
 126         rtsx_pci_init_cmd(pcr);
 127         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, pwr_on);
 128         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 129                         LDO3318_PWR_MASK, 0x00);
 130         return rtsx_pci_send_cmd(pcr, 100);
 131 }
 132
 133 static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card)
 134 {
 135         u8 pwr_mask, pwr_off;
 136
 137         pwr_mask = SD_POWER_MASK;
 138         pwr_off = SD_POWER_OFF;
 139
 140         if ((pcr->flags & PCR_MS_PMOS) && (card == RTSX_MS_CARD)) {
 141                 pwr_mask = MS_POWER_MASK;
 142                 pwr_off = MS_POWER_OFF;
 143         }
 144
 145         rtsx_pci_init_cmd(pcr);
 146         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 147                         pwr_mask | PMOS_STRG_MASK, pwr_off | PMOS_STRG_400mA);
 148         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 149                         LDO3318_PWR_MASK, 0x06);
 150         return rtsx_pci_send_cmd(pcr, 100);
 151 }
 152
 153 static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 154 {
 155         int err;
 156
 157         if (voltage == OUTPUT_3V3) {
 158                 err = rtsx_pci_write_register(pcr,
 159                                 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
 160                 if (err < 0)
 161                         return err;
 162                 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
 163                 if (err < 0)
 164                         return err;
 165         } else if (voltage == OUTPUT_1V8) {
 166                 err = rtsx_pci_write_register(pcr,
 167                                 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
 168                 if (err < 0)
 169                         return err;
 170                 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
 171                 if (err < 0)
 172                         return err;
 173         } else {
 174                 return -EINVAL;
 175         }
 176
 177         return 0;
 178 }
 179
 180 static const struct pcr_ops rts5209_pcr_ops = {
 181         .fetch_vendor_settings = rts5209_fetch_vendor_settings,
 182         .extra_init_hw = rts5209_extra_init_hw,
 183         .optimize_phy = rts5209_optimize_phy,
 184         .turn_on_led = rts5209_turn_on_led,
 185         .turn_off_led = rts5209_turn_off_led,
 186         .enable_auto_blink = rts5209_enable_auto_blink,
 187         .disable_auto_blink = rts5209_disable_auto_blink,
 188         .card_power_on = rts5209_card_power_on,
 189         .card_power_off = rts5209_card_power_off,
 190         .switch_output_voltage = rts5209_switch_output_voltage,
 191         .cd_deglitch = NULL,
 192         .conv_clk_and_div_n = NULL,
 193         .force_power_down = rts5209_force_power_down,
 194 };
 195
 196 /* SD Pull Control Enable:
 197  *     SD_DAT[3:0] ==> pull up
 198  *     SD_CD       ==> pull up
 199  *     SD_WP       ==> pull up
 200  *     SD_CMD      ==> pull up
 201  *     SD_CLK      ==> pull down
 202  */
 203 static const u32 rts5209_sd_pull_ctl_enable_tbl[] = {
 204         RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
 205         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
 206         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
 207         0,
 208 };
 209
 210 /* SD Pull Control Disable:
 211  *     SD_DAT[3:0] ==> pull down
 212  *     SD_CD       ==> pull up
 213  *     SD_WP       ==> pull down
 214  *     SD_CMD      ==> pull down
 215  *     SD_CLK      ==> pull down
 216  */
 217 static const u32 rts5209_sd_pull_ctl_disable_tbl[] = {
 218         RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55),
 219         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
 220         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
 221         0,
 222 };
 223
 224 /* MS Pull Control Enable:
 225  *     MS CD       ==> pull up
 226  *     others      ==> pull down
 227  */
 228 static const u32 rts5209_ms_pull_ctl_enable_tbl[] = {
 229         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 230         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 231         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 232         0,
 233 };
 234
 235 /* MS Pull Control Disable:
 236  *     MS CD       ==> pull up
 237  *     others      ==> pull down
 238  */
 239 static const u32 rts5209_ms_pull_ctl_disable_tbl[] = {
 240         RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
 241         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 242         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 243         0,
 244 };
 245
 246 void rts5209_init_params(struct rtsx_pcr *pcr)
 247 {
 248         pcr->extra_caps = EXTRA_CAPS_SD_SDR50 |
 249                 EXTRA_CAPS_SD_SDR104 | EXTRA_CAPS_MMC_8BIT;
 250         pcr->num_slots = 2;
 251         pcr->ops = &rts5209_pcr_ops;
 252
 253         pcr->flags = 0;
 254         pcr->card_drive_sel = RTS5209_CARD_DRIVE_DEFAULT;
 255         pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 256         pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 257         pcr->aspm_en = ASPM_L1_EN;
 258         pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
 259         pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
 260
 261         pcr->ic_version = rts5209_get_ic_version(pcr);
 262         pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
 263         pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl;
 264         pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl;
 265         pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl;
 266 }