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b158b69a37
The invoked functions already return zero on success or a negative errno code so there is no need to open code the logic in the caller. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
278 lines
7.7 KiB
C
278 lines
7.7 KiB
C
/* Driver for Realtek PCI-Express card reader
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*
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* Copyright(c) 2009-2013 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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*/
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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_fetch_vendor_settings(struct rtsx_pcr *pcr)
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{
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u32 reg;
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rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, ®);
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pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
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if (rts5209_vendor_setting1_valid(reg)) {
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if (rts5209_reg_check_ms_pmos(reg))
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pcr->flags |= PCR_MS_PMOS;
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pcr->aspm_en = rts5209_reg_to_aspm(reg);
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}
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rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, ®);
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pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
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if (rts5209_vendor_setting2_valid(reg)) {
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pcr->sd30_drive_sel_1v8 =
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rts5209_reg_to_sd30_drive_sel_1v8(reg);
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pcr->sd30_drive_sel_3v3 =
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rts5209_reg_to_sd30_drive_sel_3v3(reg);
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pcr->card_drive_sel = rts5209_reg_to_card_drive_sel(reg);
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}
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}
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static void rts5209_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
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{
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rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07);
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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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/* Reset ASPM state to default value */
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
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/* Force CLKREQ# PIN to drive 0 to request clock */
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
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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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/* Configure driving */
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
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0xFF, pcr->sd30_drive_sel_3v3);
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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->flags & 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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return rtsx_pci_send_cmd(pcr, 100);
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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->flags & 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_register(pcr,
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SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
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if (err < 0)
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return err;
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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_register(pcr,
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SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
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if (err < 0)
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return err;
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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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.fetch_vendor_settings = rts5209_fetch_vendor_settings,
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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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.conv_clk_and_div_n = NULL,
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.force_power_down = rts5209_force_power_down,
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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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pcr->flags = 0;
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pcr->card_drive_sel = RTS5209_CARD_DRIVE_DEFAULT;
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pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
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pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
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pcr->aspm_en = ASPM_L1_EN;
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pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
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pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
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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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