/* Driver for Realtek PCI-Express card reader * * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, see <http://www.gnu.org/licenses/>. * * Author: * Wei WANG <wei_wang@realsil.com.cn> */ #include <linux/module.h> #include <linux/delay.h> #include <linux/mfd/rtsx_pci.h> #include "rtsx_pcr.h" static u8 rts5209_get_ic_version(struct rtsx_pcr *pcr) { u8 val; val = rtsx_pci_readb(pcr, 0x1C); return val & 0x0F; } static void rts5209_fetch_vendor_settings(struct rtsx_pcr *pcr) { u32 reg; rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, ®); pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg); if (rts5209_vendor_setting1_valid(reg)) { if (rts5209_reg_check_ms_pmos(reg)) pcr->flags |= PCR_MS_PMOS; pcr->aspm_en = rts5209_reg_to_aspm(reg); } rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, ®); pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg); if (rts5209_vendor_setting2_valid(reg)) { pcr->sd30_drive_sel_1v8 = rts5209_reg_to_sd30_drive_sel_1v8(reg); pcr->sd30_drive_sel_3v3 = rts5209_reg_to_sd30_drive_sel_3v3(reg); pcr->card_drive_sel = rts5209_reg_to_card_drive_sel(reg); } } static void rts5209_force_power_down(struct rtsx_pcr *pcr, u8 pm_state) { rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07); } static int rts5209_extra_init_hw(struct rtsx_pcr *pcr) { rtsx_pci_init_cmd(pcr); /* Turn off LED */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO, 0xFF, 0x03); /* Reset ASPM state to default value */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0); /* Force CLKREQ# PIN to drive 0 to request clock */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08); /* Configure GPIO as output */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03); /* Configure driving */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL, 0xFF, pcr->sd30_drive_sel_3v3); return rtsx_pci_send_cmd(pcr, 100); } static int rts5209_optimize_phy(struct rtsx_pcr *pcr) { return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966); } static int rts5209_turn_on_led(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00); } static int rts5209_turn_off_led(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01); } static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D); } static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00); } static int rts5209_card_power_on(struct rtsx_pcr *pcr, int card) { int err; u8 pwr_mask, partial_pwr_on, pwr_on; pwr_mask = SD_POWER_MASK; partial_pwr_on = SD_PARTIAL_POWER_ON; pwr_on = SD_POWER_ON; if ((pcr->flags & PCR_MS_PMOS) && (card == RTSX_MS_CARD)) { pwr_mask = MS_POWER_MASK; partial_pwr_on = MS_PARTIAL_POWER_ON; pwr_on = MS_POWER_ON; } rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, partial_pwr_on); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL, LDO3318_PWR_MASK, 0x04); err = rtsx_pci_send_cmd(pcr, 100); if (err < 0) return err; /* To avoid too large in-rush current */ udelay(150); rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, pwr_on); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL, LDO3318_PWR_MASK, 0x00); err = rtsx_pci_send_cmd(pcr, 100); if (err < 0) return err; return 0; } static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card) { u8 pwr_mask, pwr_off; pwr_mask = SD_POWER_MASK; pwr_off = SD_POWER_OFF; if ((pcr->flags & PCR_MS_PMOS) && (card == RTSX_MS_CARD)) { pwr_mask = MS_POWER_MASK; pwr_off = MS_POWER_OFF; } rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask | PMOS_STRG_MASK, pwr_off | PMOS_STRG_400mA); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL, LDO3318_PWR_MASK, 0x06); return rtsx_pci_send_cmd(pcr, 100); } static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage) { int err; if (voltage == OUTPUT_3V3) { err = rtsx_pci_write_register(pcr, SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3); if (err < 0) return err; err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24); if (err < 0) return err; } else if (voltage == OUTPUT_1V8) { err = rtsx_pci_write_register(pcr, SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8); if (err < 0) return err; err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24); if (err < 0) return err; } else { return -EINVAL; } return 0; } static const struct pcr_ops rts5209_pcr_ops = { .fetch_vendor_settings = rts5209_fetch_vendor_settings, .extra_init_hw = rts5209_extra_init_hw, .optimize_phy = rts5209_optimize_phy, .turn_on_led = rts5209_turn_on_led, .turn_off_led = rts5209_turn_off_led, .enable_auto_blink = rts5209_enable_auto_blink, .disable_auto_blink = rts5209_disable_auto_blink, .card_power_on = rts5209_card_power_on, .card_power_off = rts5209_card_power_off, .switch_output_voltage = rts5209_switch_output_voltage, .cd_deglitch = NULL, .conv_clk_and_div_n = NULL, .force_power_down = rts5209_force_power_down, }; /* SD Pull Control Enable: * SD_DAT[3:0] ==> pull up * SD_CD ==> pull up * SD_WP ==> pull up * SD_CMD ==> pull up * SD_CLK ==> pull down */ static const u32 rts5209_sd_pull_ctl_enable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA), RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA), RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9), 0, }; /* SD Pull Control Disable: * SD_DAT[3:0] ==> pull down * SD_CD ==> pull up * SD_WP ==> pull down * SD_CMD ==> pull down * SD_CLK ==> pull down */ static const u32 rts5209_sd_pull_ctl_disable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5), 0, }; /* MS Pull Control Enable: * MS CD ==> pull up * others ==> pull down */ static const u32 rts5209_ms_pull_ctl_enable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15), 0, }; /* MS Pull Control Disable: * MS CD ==> pull up * others ==> pull down */ static const u32 rts5209_ms_pull_ctl_disable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15), 0, }; void rts5209_init_params(struct rtsx_pcr *pcr) { pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104 | EXTRA_CAPS_MMC_8BIT; pcr->num_slots = 2; pcr->ops = &rts5209_pcr_ops; pcr->flags = 0; pcr->card_drive_sel = RTS5209_CARD_DRIVE_DEFAULT; pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B; pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D; pcr->aspm_en = ASPM_L1_EN; pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16); pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5); pcr->ic_version = rts5209_get_ic_version(pcr); pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl; pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl; pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl; pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl; }