/* 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> * Roger Tseng <rogerable@realtek.com> */ #include <linux/module.h> #include <linux/delay.h> #include <linux/mfd/rtsx_pci.h> #include "rtsx_pcr.h" static void rts5227_fill_driving(struct rtsx_pcr *pcr, u8 voltage) { u8 driving_3v3[4][3] = { {0x13, 0x13, 0x13}, {0x96, 0x96, 0x96}, {0x7F, 0x7F, 0x7F}, {0x96, 0x96, 0x96}, }; u8 driving_1v8[4][3] = { {0x99, 0x99, 0x99}, {0xAA, 0xAA, 0xAA}, {0xFE, 0xFE, 0xFE}, {0xB3, 0xB3, 0xB3}, }; u8 (*driving)[3], drive_sel; if (voltage == OUTPUT_3V3) { driving = driving_3v3; drive_sel = pcr->sd30_drive_sel_3v3; } else { driving = driving_1v8; drive_sel = pcr->sd30_drive_sel_1v8; } rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL, 0xFF, driving[drive_sel][0]); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL, 0xFF, driving[drive_sel][1]); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL, 0xFF, driving[drive_sel][2]); } static void rts5227_fetch_vendor_settings(struct rtsx_pcr *pcr) { u32 reg; rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, ®); dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg); if (!rtsx_vendor_setting_valid(reg)) return; pcr->aspm_en = rtsx_reg_to_aspm(reg); pcr->sd30_drive_sel_1v8 = rtsx_reg_to_sd30_drive_sel_1v8(reg); pcr->card_drive_sel &= 0x3F; pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg); rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, ®); dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg); pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg); if (rtsx_reg_check_reverse_socket(reg)) pcr->flags |= PCR_REVERSE_SOCKET; } static void rts5227_force_power_down(struct rtsx_pcr *pcr, u8 pm_state) { /* Set relink_time to 0 */ rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, 0xFF, 0); rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, 0xFF, 0); rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3, 0x01, 0); if (pm_state == HOST_ENTER_S3) rtsx_pci_write_register(pcr, PM_CTRL3, 0x10, 0x10); rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03); } static int rts5227_extra_init_hw(struct rtsx_pcr *pcr) { u16 cap; rtsx_pci_init_cmd(pcr); /* Configure GPIO as output */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02); /* Reset ASPM state to default value */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0); /* Switch LDO3318 source from DV33 to card_3v3 */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01); /* LED shine disabled, set initial shine cycle period */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02); /* Configure LTR */ pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &cap); if (cap & PCI_EXP_DEVCTL2_LTR_EN) rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LTR_CTL, 0xFF, 0xA3); /* Configure OBFF */ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OBFF_CFG, 0x03, 0x03); /* Configure driving */ rts5227_fill_driving(pcr, OUTPUT_3V3); /* Configure force_clock_req */ if (pcr->flags & PCR_REVERSE_SOCKET) rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, AUTOLOAD_CFG_BASE + 3, 0xB8, 0xB8); else rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, AUTOLOAD_CFG_BASE + 3, 0xB8, 0x88); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x10, 0x00); return rtsx_pci_send_cmd(pcr, 100); } static int rts5227_optimize_phy(struct rtsx_pcr *pcr) { /* Optimize RX sensitivity */ return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42); } static int rts5227_turn_on_led(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02); } static int rts5227_turn_off_led(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00); } static int rts5227_enable_auto_blink(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08); } static int rts5227_disable_auto_blink(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00); } static int rts5227_card_power_on(struct rtsx_pcr *pcr, int card) { int err; rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, SD_POWER_MASK, SD_PARTIAL_POWER_ON); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL, LDO3318_PWR_MASK, 0x02); 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, SD_POWER_MASK, SD_POWER_ON); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL, LDO3318_PWR_MASK, 0x06); err = rtsx_pci_send_cmd(pcr, 100); if (err < 0) return err; return 0; } static int rts5227_card_power_off(struct rtsx_pcr *pcr, int card) { rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, SD_POWER_MASK | PMOS_STRG_MASK, SD_POWER_OFF | PMOS_STRG_400mA); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL, LDO3318_PWR_MASK, 0X00); return rtsx_pci_send_cmd(pcr, 100); } static int rts5227_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage) { int err; if (voltage == OUTPUT_3V3) { err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24); if (err < 0) return err; } else if (voltage == OUTPUT_1V8) { err = rtsx_pci_write_phy_register(pcr, 0x11, 0x3C02); if (err < 0) return err; err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C80 | 0x24); if (err < 0) return err; } else { return -EINVAL; } /* set pad drive */ rtsx_pci_init_cmd(pcr); rts5227_fill_driving(pcr, voltage); return rtsx_pci_send_cmd(pcr, 100); } static const struct pcr_ops rts5227_pcr_ops = { .fetch_vendor_settings = rts5227_fetch_vendor_settings, .extra_init_hw = rts5227_extra_init_hw, .optimize_phy = rts5227_optimize_phy, .turn_on_led = rts5227_turn_on_led, .turn_off_led = rts5227_turn_off_led, .enable_auto_blink = rts5227_enable_auto_blink, .disable_auto_blink = rts5227_disable_auto_blink, .card_power_on = rts5227_card_power_on, .card_power_off = rts5227_card_power_off, .switch_output_voltage = rts5227_switch_output_voltage, .cd_deglitch = NULL, .conv_clk_and_div_n = NULL, .force_power_down = rts5227_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 rts5227_sd_pull_ctl_enable_tbl[] = { 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 rts5227_sd_pull_ctl_disable_tbl[] = { 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 rts5227_ms_pull_ctl_enable_tbl[] = { 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 rts5227_ms_pull_ctl_disable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15), 0, }; void rts5227_init_params(struct rtsx_pcr *pcr) { pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104; pcr->num_slots = 2; pcr->ops = &rts5227_pcr_ops; pcr->flags = 0; pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT; pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B; pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B; pcr->aspm_en = ASPM_L1_EN; pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15); pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 7, 7); pcr->sd_pull_ctl_enable_tbl = rts5227_sd_pull_ctl_enable_tbl; pcr->sd_pull_ctl_disable_tbl = rts5227_sd_pull_ctl_disable_tbl; pcr->ms_pull_ctl_enable_tbl = rts5227_ms_pull_ctl_enable_tbl; pcr->ms_pull_ctl_disable_tbl = rts5227_ms_pull_ctl_disable_tbl; }