drivers/misc/cardreader/rts5229.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 rts5229_get_ic_version(struct rtsx_pcr *pcr)
  17 {
  18         u8 val;
  19
  20         rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
  21         return val & 0x0F;
  22 }
  23
  24 static void rts5229_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 (!rtsx_vendor_setting_valid(reg))
  33                 return;
  34
  35         pcr->aspm_en = rtsx_reg_to_aspm(reg);
  36         pcr->sd30_drive_sel_1v8 =
  37                 map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
  38         pcr->card_drive_sel &= 0x3F;
  39         pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
  40
  41         pci_read_config_dword(pdev, PCR_SETTING_REG2, &reg);
  42         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
  43         pcr->sd30_drive_sel_3v3 =
  44                 map_sd_drive(rtsx_reg_to_sd30_drive_sel_3v3(reg));
  45 }
  46
  47 static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
  48 {
  49         rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
  50 }
  51
  52 static int rts5229_extra_init_hw(struct rtsx_pcr *pcr)
  53 {
  54         rtsx_pci_init_cmd(pcr);
  55
  56         /* Configure GPIO as output */
  57         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
  58         /* Reset ASPM state to default value */
  59         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
  60         /* Force CLKREQ# PIN to drive 0 to request clock */
  61         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
  62         /* Switch LDO3318 source from DV33 to card_3v3 */
  63         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
  64         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
  65         /* LED shine disabled, set initial shine cycle period */
  66         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
  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 rts5229_optimize_phy(struct rtsx_pcr *pcr)
  75 {
  76         /* Optimize RX sensitivity */
  77         return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
  78 }
  79
  80 static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
  81 {
  82         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
  83 }
  84
  85 static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
  86 {
  87         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
  88 }
  89
  90 static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
  91 {
  92         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
  93 }
  94
  95 static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
  96 {
  97         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
  98 }
  99
 100 static int rts5229_card_power_on(struct rtsx_pcr *pcr, int card)
 101 {
 102         int err;
 103
 104         rtsx_pci_init_cmd(pcr);
 105         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 106                         SD_POWER_MASK, SD_PARTIAL_POWER_ON);
 107         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 108                         LDO3318_PWR_MASK, 0x02);
 109         err = rtsx_pci_send_cmd(pcr, 100);
 110         if (err < 0)
 111                 return err;
 112
 113         /* To avoid too large in-rush current */
 114         udelay(150);
 115
 116         rtsx_pci_init_cmd(pcr);
 117         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 118                         SD_POWER_MASK, SD_POWER_ON);
 119         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 120                         LDO3318_PWR_MASK, 0x06);
 121         return rtsx_pci_send_cmd(pcr, 100);
 122 }
 123
 124 static int rts5229_card_power_off(struct rtsx_pcr *pcr, int card)
 125 {
 126         rtsx_pci_init_cmd(pcr);
 127         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
 128                         SD_POWER_MASK | PMOS_STRG_MASK,
 129                         SD_POWER_OFF | PMOS_STRG_400mA);
 130         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
 131                         LDO3318_PWR_MASK, 0x00);
 132         return rtsx_pci_send_cmd(pcr, 100);
 133 }
 134
 135 static int rts5229_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 136 {
 137         int err;
 138
 139         if (voltage == OUTPUT_3V3) {
 140                 err = rtsx_pci_write_register(pcr,
 141                                 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
 142                 if (err < 0)
 143                         return err;
 144                 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
 145                 if (err < 0)
 146                         return err;
 147         } else if (voltage == OUTPUT_1V8) {
 148                 err = rtsx_pci_write_register(pcr,
 149                                 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
 150                 if (err < 0)
 151                         return err;
 152                 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
 153                 if (err < 0)
 154                         return err;
 155         } else {
 156                 return -EINVAL;
 157         }
 158
 159         return 0;
 160 }
 161
 162 static const struct pcr_ops rts5229_pcr_ops = {
 163         .fetch_vendor_settings = rts5229_fetch_vendor_settings,
 164         .extra_init_hw = rts5229_extra_init_hw,
 165         .optimize_phy = rts5229_optimize_phy,
 166         .turn_on_led = rts5229_turn_on_led,
 167         .turn_off_led = rts5229_turn_off_led,
 168         .enable_auto_blink = rts5229_enable_auto_blink,
 169         .disable_auto_blink = rts5229_disable_auto_blink,
 170         .card_power_on = rts5229_card_power_on,
 171         .card_power_off = rts5229_card_power_off,
 172         .switch_output_voltage = rts5229_switch_output_voltage,
 173         .cd_deglitch = NULL,
 174         .conv_clk_and_div_n = NULL,
 175         .force_power_down = rts5229_force_power_down,
 176 };
 177
 178 /* SD Pull Control Enable:
 179  *     SD_DAT[3:0] ==> pull up
 180  *     SD_CD       ==> pull up
 181  *     SD_WP       ==> pull up
 182  *     SD_CMD      ==> pull up
 183  *     SD_CLK      ==> pull down
 184  */
 185 static const u32 rts5229_sd_pull_ctl_enable_tbl1[] = {
 186         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
 187         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
 188         0,
 189 };
 190
 191 /* For RTS5229 version C */
 192 static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
 193         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
 194         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
 195         0,
 196 };
 197
 198 /* SD Pull Control Disable:
 199  *     SD_DAT[3:0] ==> pull down
 200  *     SD_CD       ==> pull up
 201  *     SD_WP       ==> pull down
 202  *     SD_CMD      ==> pull down
 203  *     SD_CLK      ==> pull down
 204  */
 205 static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
 206         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
 207         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
 208         0,
 209 };
 210
 211 /* For RTS5229 version C */
 212 static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
 213         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
 214         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
 215         0,
 216 };
 217
 218 /* MS Pull Control Enable:
 219  *     MS CD       ==> pull up
 220  *     others      ==> pull down
 221  */
 222 static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
 223         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 224         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 225         0,
 226 };
 227
 228 /* MS Pull Control Disable:
 229  *     MS CD       ==> pull up
 230  *     others      ==> pull down
 231  */
 232 static const u32 rts5229_ms_pull_ctl_disable_tbl[] = {
 233         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 234         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 235         0,
 236 };
 237
 238 void rts5229_init_params(struct rtsx_pcr *pcr)
 239 {
 240         pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
 241         pcr->num_slots = 2;
 242         pcr->ops = &rts5229_pcr_ops;
 243
 244         pcr->flags = 0;
 245         pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
 246         pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 247         pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 248         pcr->aspm_en = ASPM_L1_EN;
 249         pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
 250         pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
 251
 252         pcr->ic_version = rts5229_get_ic_version(pcr);
 253         if (pcr->ic_version == IC_VER_C) {
 254                 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
 255                 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
 256         } else {
 257                 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
 258                 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
 259         }
 260         pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
 261         pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
 262 }