diff options
Diffstat (limited to 'drivers/mfd/rts5209.c')
| -rw-r--r-- | drivers/mfd/rts5209.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/drivers/mfd/rts5209.c b/drivers/mfd/rts5209.c new file mode 100644 index 00000000000..283a4f14808 --- /dev/null +++ b/drivers/mfd/rts5209.c @@ -0,0 +1,223 @@ +/* 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_init_vendor_cfg(struct rtsx_pcr *pcr) +{ + u32 val; + + rtsx_pci_read_config_dword(pcr, 0x724, &val); + dev_dbg(&(pcr->pci->dev), "Cfg 0x724: 0x%x\n", val); + + if (!(val & 0x80)) { + if (val & 0x08) + pcr->ms_pmos = false; + else + pcr->ms_pmos = true; + } +} + +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); + + 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->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->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 const struct pcr_ops rts5209_pcr_ops = { + .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, + .cd_deglitch = 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; + + rts5209_init_vendor_cfg(pcr); + + 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; +} |