/* Driver for Realtek PCI-Express card reader * * Copyright(c) 2009 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> * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China */ #include <linux/module.h> #include <linux/bitops.h> #include <linux/delay.h> #include <linux/mfd/rtsx_pci.h> #include "rtsx_pcr.h" static u8 rtl8411_get_ic_version(struct rtsx_pcr *pcr) { u8 val; rtsx_pci_read_register(pcr, SYS_VER, &val); return val & 0x0F; } static int rtl8411_extra_init_hw(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CD_PAD_CTL, CD_DISABLE_MASK | CD_AUTO_DISABLE, CD_ENABLE); } static int rtl8411_turn_on_led(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00); } static int rtl8411_turn_off_led(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01); } static int rtl8411_enable_auto_blink(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D); } static int rtl8411_disable_auto_blink(struct rtsx_pcr *pcr) { return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00); } static int rtl8411_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, BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_CTL, BPP_LDO_POWB, BPP_LDO_SUSPEND); err = rtsx_pci_send_cmd(pcr, 100); if (err < 0) return err; /* To avoid too large in-rush current */ udelay(150); err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, BPP_POWER_MASK, BPP_POWER_10_PERCENT_ON); if (err < 0) return err; udelay(150); err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, BPP_POWER_MASK, BPP_POWER_15_PERCENT_ON); if (err < 0) return err; udelay(150); err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, BPP_POWER_MASK, BPP_POWER_ON); if (err < 0) return err; return rtsx_pci_write_register(pcr, LDO_CTL, BPP_LDO_POWB, BPP_LDO_ON); } static int rtl8411_card_power_off(struct rtsx_pcr *pcr, int card) { int err; err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, BPP_POWER_MASK, BPP_POWER_OFF); if (err < 0) return err; return rtsx_pci_write_register(pcr, LDO_CTL, BPP_LDO_POWB, BPP_LDO_SUSPEND); } static int rtl8411_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage) { u8 mask, val; int err; mask = (BPP_REG_TUNED18 << BPP_TUNED18_SHIFT_8411) | BPP_PAD_MASK; if (voltage == OUTPUT_3V3) { err = rtsx_pci_write_register(pcr, SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_D); if (err < 0) return err; val = (BPP_ASIC_3V3 << BPP_TUNED18_SHIFT_8411) | BPP_PAD_3V3; } else if (voltage == OUTPUT_1V8) { err = rtsx_pci_write_register(pcr, SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_B); if (err < 0) return err; val = (BPP_ASIC_1V8 << BPP_TUNED18_SHIFT_8411) | BPP_PAD_1V8; } else { return -EINVAL; } return rtsx_pci_write_register(pcr, LDO_CTL, mask, val); } static unsigned int rtl8411_cd_deglitch(struct rtsx_pcr *pcr) { unsigned int card_exist; card_exist = rtsx_pci_readl(pcr, RTSX_BIPR); card_exist &= CARD_EXIST; if (!card_exist) { /* Enable card CD */ rtsx_pci_write_register(pcr, CD_PAD_CTL, CD_DISABLE_MASK, CD_ENABLE); /* Enable card interrupt */ rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x00); return 0; } if (hweight32(card_exist) > 1) { rtsx_pci_write_register(pcr, CARD_PWR_CTL, BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON); msleep(100); card_exist = rtsx_pci_readl(pcr, RTSX_BIPR); if (card_exist & MS_EXIST) card_exist = MS_EXIST; else if (card_exist & SD_EXIST) card_exist = SD_EXIST; else card_exist = 0; rtsx_pci_write_register(pcr, CARD_PWR_CTL, BPP_POWER_MASK, BPP_POWER_OFF); dev_dbg(&(pcr->pci->dev), "After CD deglitch, card_exist = 0x%x\n", card_exist); } if (card_exist & MS_EXIST) { /* Disable SD interrupt */ rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x40); rtsx_pci_write_register(pcr, CD_PAD_CTL, CD_DISABLE_MASK, MS_CD_EN_ONLY); } else if (card_exist & SD_EXIST) { /* Disable MS interrupt */ rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x80); rtsx_pci_write_register(pcr, CD_PAD_CTL, CD_DISABLE_MASK, SD_CD_EN_ONLY); } return card_exist; } static int rtl8411_conv_clk_and_div_n(int input, int dir) { int output; if (dir == CLK_TO_DIV_N) output = input * 4 / 5 - 2; else output = (input + 2) * 5 / 4; return output; } static const struct pcr_ops rtl8411_pcr_ops = { .extra_init_hw = rtl8411_extra_init_hw, .optimize_phy = NULL, .turn_on_led = rtl8411_turn_on_led, .turn_off_led = rtl8411_turn_off_led, .enable_auto_blink = rtl8411_enable_auto_blink, .disable_auto_blink = rtl8411_disable_auto_blink, .card_power_on = rtl8411_card_power_on, .card_power_off = rtl8411_card_power_off, .switch_output_voltage = rtl8411_switch_output_voltage, .cd_deglitch = rtl8411_cd_deglitch, .conv_clk_and_div_n = rtl8411_conv_clk_and_div_n, }; /* 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 rtl8411_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, 0xA9), RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09), RTSX_REG_PAIR(CARD_PULL_CTL5, 0x09), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), 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 rtl8411_sd_pull_ctl_disable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65), RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95), RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09), RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), 0, }; /* MS Pull Control Enable: * MS CD ==> pull up * others ==> pull down */ static const u32 rtl8411_ms_pull_ctl_enable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65), RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95), RTSX_REG_PAIR(CARD_PULL_CTL4, 0x05), RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), 0, }; /* MS Pull Control Disable: * MS CD ==> pull up * others ==> pull down */ static const u32 rtl8411_ms_pull_ctl_disable_tbl[] = { RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65), RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95), RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09), RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05), RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), 0, }; void rtl8411_init_params(struct rtsx_pcr *pcr) { pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104; pcr->num_slots = 2; pcr->ops = &rtl8411_pcr_ops; pcr->ic_version = rtl8411_get_ic_version(pcr); pcr->sd_pull_ctl_enable_tbl = rtl8411_sd_pull_ctl_enable_tbl; pcr->sd_pull_ctl_disable_tbl = rtl8411_sd_pull_ctl_disable_tbl; pcr->ms_pull_ctl_enable_tbl = rtl8411_ms_pull_ctl_enable_tbl; pcr->ms_pull_ctl_disable_tbl = rtl8411_ms_pull_ctl_disable_tbl; }