| /* 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/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, ®); |
| dev_dbg(&(pcr->pci->dev), "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, ®); |
| dev_dbg(&(pcr->pci->dev), "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 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); |
| /* 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, |
| }; |
| |
| /* 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->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; |
| } |
