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https://github.com/torvalds/linux
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d817ac4e18
Different card reader has different method to switch output voltage, add this callback to let the card reader implement its individual switch function. This is needed as rtl8411 has a specific switch output voltage procedure. Signed-off-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
244 lines
6.2 KiB
C
244 lines
6.2 KiB
C
/* Driver for Realtek PCI-Express card reader
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*
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* Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Wei WANG <wei_wang@realsil.com.cn>
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* No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/mfd/rtsx_pci.h>
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#include "rtsx_pcr.h"
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static u8 rts5209_get_ic_version(struct rtsx_pcr *pcr)
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{
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u8 val;
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val = rtsx_pci_readb(pcr, 0x1C);
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return val & 0x0F;
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}
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static void rts5209_init_vendor_cfg(struct rtsx_pcr *pcr)
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{
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u32 val;
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rtsx_pci_read_config_dword(pcr, 0x724, &val);
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dev_dbg(&(pcr->pci->dev), "Cfg 0x724: 0x%x\n", val);
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if (!(val & 0x80)) {
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if (val & 0x08)
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pcr->ms_pmos = false;
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else
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pcr->ms_pmos = true;
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}
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}
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static int rts5209_extra_init_hw(struct rtsx_pcr *pcr)
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{
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rtsx_pci_init_cmd(pcr);
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/* Turn off LED */
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO, 0xFF, 0x03);
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/* Configure GPIO as output */
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
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return rtsx_pci_send_cmd(pcr, 100);
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}
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static int rts5209_optimize_phy(struct rtsx_pcr *pcr)
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{
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return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966);
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}
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static int rts5209_turn_on_led(struct rtsx_pcr *pcr)
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{
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return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
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}
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static int rts5209_turn_off_led(struct rtsx_pcr *pcr)
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{
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return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
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}
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static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr)
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{
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return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
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}
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static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr)
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{
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return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
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}
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static int rts5209_card_power_on(struct rtsx_pcr *pcr, int card)
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{
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int err;
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u8 pwr_mask, partial_pwr_on, pwr_on;
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pwr_mask = SD_POWER_MASK;
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partial_pwr_on = SD_PARTIAL_POWER_ON;
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pwr_on = SD_POWER_ON;
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if (pcr->ms_pmos && (card == RTSX_MS_CARD)) {
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pwr_mask = MS_POWER_MASK;
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partial_pwr_on = MS_PARTIAL_POWER_ON;
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pwr_on = MS_POWER_ON;
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}
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rtsx_pci_init_cmd(pcr);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
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pwr_mask, partial_pwr_on);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
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LDO3318_PWR_MASK, 0x04);
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err = rtsx_pci_send_cmd(pcr, 100);
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if (err < 0)
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return err;
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/* To avoid too large in-rush current */
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udelay(150);
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rtsx_pci_init_cmd(pcr);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, pwr_on);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
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LDO3318_PWR_MASK, 0x00);
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err = rtsx_pci_send_cmd(pcr, 100);
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if (err < 0)
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return err;
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return 0;
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}
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static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card)
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{
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u8 pwr_mask, pwr_off;
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pwr_mask = SD_POWER_MASK;
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pwr_off = SD_POWER_OFF;
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if (pcr->ms_pmos && (card == RTSX_MS_CARD)) {
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pwr_mask = MS_POWER_MASK;
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pwr_off = MS_POWER_OFF;
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}
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rtsx_pci_init_cmd(pcr);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
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pwr_mask | PMOS_STRG_MASK, pwr_off | PMOS_STRG_400mA);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
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LDO3318_PWR_MASK, 0X06);
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return rtsx_pci_send_cmd(pcr, 100);
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}
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static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
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{
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int err;
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if (voltage == OUTPUT_3V3) {
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err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
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if (err < 0)
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return err;
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} else if (voltage == OUTPUT_1V8) {
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err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
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if (err < 0)
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return err;
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} else {
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return -EINVAL;
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}
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return 0;
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}
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static const struct pcr_ops rts5209_pcr_ops = {
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.extra_init_hw = rts5209_extra_init_hw,
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.optimize_phy = rts5209_optimize_phy,
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.turn_on_led = rts5209_turn_on_led,
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.turn_off_led = rts5209_turn_off_led,
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.enable_auto_blink = rts5209_enable_auto_blink,
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.disable_auto_blink = rts5209_disable_auto_blink,
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.card_power_on = rts5209_card_power_on,
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.card_power_off = rts5209_card_power_off,
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.switch_output_voltage = rts5209_switch_output_voltage,
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.cd_deglitch = NULL,
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};
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/* SD Pull Control Enable:
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* SD_DAT[3:0] ==> pull up
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* SD_CD ==> pull up
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* SD_WP ==> pull up
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* SD_CMD ==> pull up
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* SD_CLK ==> pull down
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*/
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static const u32 rts5209_sd_pull_ctl_enable_tbl[] = {
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RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
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RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
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RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
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0,
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};
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/* SD Pull Control Disable:
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* SD_DAT[3:0] ==> pull down
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* SD_CD ==> pull up
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* SD_WP ==> pull down
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* SD_CMD ==> pull down
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* SD_CLK ==> pull down
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*/
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static const u32 rts5209_sd_pull_ctl_disable_tbl[] = {
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RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55),
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RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
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RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
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0,
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};
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/* MS Pull Control Enable:
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* MS CD ==> pull up
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* others ==> pull down
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*/
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static const u32 rts5209_ms_pull_ctl_enable_tbl[] = {
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RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
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RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
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RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
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0,
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};
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/* MS Pull Control Disable:
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* MS CD ==> pull up
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* others ==> pull down
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*/
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static const u32 rts5209_ms_pull_ctl_disable_tbl[] = {
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RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
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RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
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RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
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0,
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};
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void rts5209_init_params(struct rtsx_pcr *pcr)
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{
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pcr->extra_caps = EXTRA_CAPS_SD_SDR50 |
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EXTRA_CAPS_SD_SDR104 | EXTRA_CAPS_MMC_8BIT;
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pcr->num_slots = 2;
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pcr->ops = &rts5209_pcr_ops;
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rts5209_init_vendor_cfg(pcr);
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pcr->ic_version = rts5209_get_ic_version(pcr);
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pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
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pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl;
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pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl;
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pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl;
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}
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