linux/drivers/misc/cardreader/rts5229.c
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   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
  16static 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
  24static 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
  47static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
  48{
  49        rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
  50}
  51
  52static 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
  74static 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
  80static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
  81{
  82        return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
  83}
  84
  85static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
  86{
  87        return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
  88}
  89
  90static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
  91{
  92        return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
  93}
  94
  95static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
  96{
  97        return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
  98}
  99
 100static 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
 124static 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
 135static 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
 162static 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 */
 185static 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 */
 192static 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 */
 205static 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 */
 212static 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 */
 222static 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 */
 232static 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
 238void 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->aspm_mode = ASPM_MODE_CFG;
 250        pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
 251        pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
 252
 253        pcr->ic_version = rts5229_get_ic_version(pcr);
 254        if (pcr->ic_version == IC_VER_C) {
 255                pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
 256                pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
 257        } else {
 258                pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
 259                pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
 260        }
 261        pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
 262        pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
 263}
 264