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path: root/drivers/misc/cardreader/rts5261.c
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-rw-r--r--drivers/misc/cardreader/rts5261.c806
1 files changed, 806 insertions, 0 deletions
diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
new file mode 100644
index 000000000..67252512a
--- /dev/null
+++ b/drivers/misc/cardreader/rts5261.c
@@ -0,0 +1,806 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Driver for Realtek PCI-Express card reader
+ *
+ * Copyright(c) 2018-2019 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * Author:
+ * Rui FENG <rui_feng@realsil.com.cn>
+ * Wei WANG <wei_wang@realsil.com.cn>
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/rtsx_pci.h>
+
+#include "rts5261.h"
+#include "rtsx_pcr.h"
+
+static u8 rts5261_get_ic_version(struct rtsx_pcr *pcr)
+{
+ u8 val;
+
+ rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
+ return val & IC_VERSION_MASK;
+}
+
+static void rts5261_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
+{
+ u8 driving_3v3[4][3] = {
+ {0x96, 0x96, 0x96},
+ {0x96, 0x96, 0x96},
+ {0x7F, 0x7F, 0x7F},
+ {0x13, 0x13, 0x13},
+ };
+ u8 driving_1v8[4][3] = {
+ {0xB3, 0xB3, 0xB3},
+ {0x3A, 0x3A, 0x3A},
+ {0xE6, 0xE6, 0xE6},
+ {0x99, 0x99, 0x99},
+ };
+ u8 (*driving)[3], drive_sel;
+
+ if (voltage == OUTPUT_3V3) {
+ driving = driving_3v3;
+ drive_sel = pcr->sd30_drive_sel_3v3;
+ } else {
+ driving = driving_1v8;
+ drive_sel = pcr->sd30_drive_sel_1v8;
+ }
+
+ rtsx_pci_write_register(pcr, SD30_CLK_DRIVE_SEL,
+ 0xFF, driving[drive_sel][0]);
+
+ rtsx_pci_write_register(pcr, SD30_CMD_DRIVE_SEL,
+ 0xFF, driving[drive_sel][1]);
+
+ rtsx_pci_write_register(pcr, SD30_DAT_DRIVE_SEL,
+ 0xFF, driving[drive_sel][2]);
+}
+
+static void rts5261_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool runtime)
+{
+ /* Set relink_time to 0 */
+ rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, MASK_8_BIT_DEF, 0);
+ rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, MASK_8_BIT_DEF, 0);
+ rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3,
+ RELINK_TIME_MASK, 0);
+
+ if (pm_state == HOST_ENTER_S3)
+ rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3,
+ D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
+
+ if (!runtime) {
+ rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
+ CD_RESUME_EN_MASK, 0);
+ rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+
+ } else {
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ FORCE_PM_CONTROL | FORCE_PM_VALUE, 0);
+
+ rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
+ RTS5261_INFORM_RTD3_COLD, RTS5261_INFORM_RTD3_COLD);
+ rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
+ RTS5261_FORCE_PRSNT_LOW, RTS5261_FORCE_PRSNT_LOW);
+
+ }
+
+ rtsx_pci_write_register(pcr, RTS5261_REG_FPDCTL,
+ SSC_POWER_DOWN, SSC_POWER_DOWN);
+}
+
+static int rts5261_enable_auto_blink(struct rtsx_pcr *pcr)
+{
+ return rtsx_pci_write_register(pcr, OLT_LED_CTL,
+ LED_SHINE_MASK, LED_SHINE_EN);
+}
+
+static int rts5261_disable_auto_blink(struct rtsx_pcr *pcr)
+{
+ return rtsx_pci_write_register(pcr, OLT_LED_CTL,
+ LED_SHINE_MASK, LED_SHINE_DISABLE);
+}
+
+static int rts5261_turn_on_led(struct rtsx_pcr *pcr)
+{
+ return rtsx_pci_write_register(pcr, GPIO_CTL,
+ 0x02, 0x02);
+}
+
+static int rts5261_turn_off_led(struct rtsx_pcr *pcr)
+{
+ return rtsx_pci_write_register(pcr, GPIO_CTL,
+ 0x02, 0x00);
+}
+
+/* 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 rts5261_sd_pull_ctl_enable_tbl[] = {
+ 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 rts5261_sd_pull_ctl_disable_tbl[] = {
+ RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+ RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
+ 0,
+};
+
+static int rts5261_sd_set_sample_push_timing_sd30(struct rtsx_pcr *pcr)
+{
+ rtsx_pci_write_register(pcr, SD_CFG1, SD_MODE_SELECT_MASK
+ | SD_ASYNC_FIFO_NOT_RST, SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
+ rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, CLK_LOW_FREQ);
+ rtsx_pci_write_register(pcr, CARD_CLK_SOURCE, 0xFF,
+ CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
+ rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
+
+ return 0;
+}
+
+static int rts5261_card_power_on(struct rtsx_pcr *pcr, int card)
+{
+ struct rtsx_cr_option *option = &pcr->option;
+
+ if (option->ocp_en)
+ rtsx_pci_enable_ocp(pcr);
+
+ rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
+ CFG_SD_POW_AUTO_PD, CFG_SD_POW_AUTO_PD);
+
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG1,
+ RTS5261_LDO1_TUNE_MASK, RTS5261_LDO1_33);
+ rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
+ RTS5261_LDO1_POWERON, RTS5261_LDO1_POWERON);
+
+ rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
+ RTS5261_LDO3318_POWERON, RTS5261_LDO3318_POWERON);
+
+ msleep(20);
+
+ rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
+
+ /* Initialize SD_CFG1 register */
+ rtsx_pci_write_register(pcr, SD_CFG1, 0xFF,
+ SD_CLK_DIVIDE_128 | SD_20_MODE | SD_BUS_WIDTH_1BIT);
+
+ rtsx_pci_write_register(pcr, SD_SAMPLE_POINT_CTL,
+ 0xFF, SD20_RX_POS_EDGE);
+ rtsx_pci_write_register(pcr, SD_PUSH_POINT_CTL, 0xFF, 0);
+ rtsx_pci_write_register(pcr, CARD_STOP, SD_STOP | SD_CLR_ERR,
+ SD_STOP | SD_CLR_ERR);
+
+ /* Reset SD_CFG3 register */
+ rtsx_pci_write_register(pcr, SD_CFG3, SD30_CLK_END_EN, 0);
+ rtsx_pci_write_register(pcr, REG_SD_STOP_SDCLK_CFG,
+ SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
+ SD30_CLK_STOP_CFG0, 0);
+
+ if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50 ||
+ pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
+ rts5261_sd_set_sample_push_timing_sd30(pcr);
+
+ return 0;
+}
+
+static int rts5261_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
+{
+ int err;
+ u16 val = 0;
+
+ rtsx_pci_write_register(pcr, RTS5261_CARD_PWR_CTL,
+ RTS5261_PUPDC, RTS5261_PUPDC);
+
+ switch (voltage) {
+ case OUTPUT_3V3:
+ rtsx_pci_read_phy_register(pcr, PHY_TUNE, &val);
+ val |= PHY_TUNE_SDBUS_33;
+ err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
+ if (err < 0)
+ return err;
+
+ rtsx_pci_write_register(pcr, RTS5261_DV3318_CFG,
+ RTS5261_DV3318_TUNE_MASK, RTS5261_DV3318_33);
+ rtsx_pci_write_register(pcr, SD_PAD_CTL,
+ SD_IO_USING_1V8, 0);
+ break;
+ case OUTPUT_1V8:
+ rtsx_pci_read_phy_register(pcr, PHY_TUNE, &val);
+ val &= ~PHY_TUNE_SDBUS_33;
+ err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
+ if (err < 0)
+ return err;
+
+ rtsx_pci_write_register(pcr, RTS5261_DV3318_CFG,
+ RTS5261_DV3318_TUNE_MASK, RTS5261_DV3318_18);
+ rtsx_pci_write_register(pcr, SD_PAD_CTL,
+ SD_IO_USING_1V8, SD_IO_USING_1V8);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* set pad drive */
+ rts5261_fill_driving(pcr, voltage);
+
+ return 0;
+}
+
+static void rts5261_stop_cmd(struct rtsx_pcr *pcr)
+{
+ rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
+ rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
+ rtsx_pci_write_register(pcr, RTS5260_DMA_RST_CTL_0,
+ RTS5260_DMA_RST | RTS5260_ADMA3_RST,
+ RTS5260_DMA_RST | RTS5260_ADMA3_RST);
+ rtsx_pci_write_register(pcr, RBCTL, RB_FLUSH, RB_FLUSH);
+}
+
+static void rts5261_card_before_power_off(struct rtsx_pcr *pcr)
+{
+ rts5261_stop_cmd(pcr);
+ rts5261_switch_output_voltage(pcr, OUTPUT_3V3);
+
+}
+
+static void rts5261_enable_ocp(struct rtsx_pcr *pcr)
+{
+ u8 val = 0;
+
+ val = SD_OCP_INT_EN | SD_DETECT_EN;
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
+ RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN,
+ RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN);
+ rtsx_pci_write_register(pcr, REG_OCPCTL, 0xFF, val);
+
+}
+
+static void rts5261_disable_ocp(struct rtsx_pcr *pcr)
+{
+ u8 mask = 0;
+
+ mask = SD_OCP_INT_EN | SD_DETECT_EN;
+ rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
+ RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN, 0);
+
+}
+
+static int rts5261_card_power_off(struct rtsx_pcr *pcr, int card)
+{
+ int err = 0;
+
+ rts5261_card_before_power_off(pcr);
+ err = rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
+ RTS5261_LDO_POWERON_MASK, 0);
+
+ rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
+ CFG_SD_POW_AUTO_PD, 0);
+ if (pcr->option.ocp_en)
+ rtsx_pci_disable_ocp(pcr);
+
+ return err;
+}
+
+static void rts5261_init_ocp(struct rtsx_pcr *pcr)
+{
+ struct rtsx_cr_option *option = &pcr->option;
+
+ if (option->ocp_en) {
+ u8 mask, val;
+
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
+ RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN,
+ RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN);
+
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
+ RTS5261_LDO1_OCP_THD_MASK, option->sd_800mA_ocp_thd);
+
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
+ RTS5261_LDO1_OCP_LMT_THD_MASK,
+ RTS5261_LDO1_LMT_THD_2000);
+
+ mask = SD_OCP_GLITCH_MASK;
+ val = pcr->hw_param.ocp_glitch;
+ rtsx_pci_write_register(pcr, REG_OCPGLITCH, mask, val);
+
+ rts5261_enable_ocp(pcr);
+ } else {
+ rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
+ RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN, 0);
+ }
+}
+
+static void rts5261_clear_ocpstat(struct rtsx_pcr *pcr)
+{
+ u8 mask = 0;
+ u8 val = 0;
+
+ mask = SD_OCP_INT_CLR | SD_OC_CLR;
+ val = SD_OCP_INT_CLR | SD_OC_CLR;
+
+ rtsx_pci_write_register(pcr, REG_OCPCTL, mask, val);
+
+ udelay(1000);
+ rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
+
+}
+
+static void rts5261_process_ocp(struct rtsx_pcr *pcr)
+{
+ if (!pcr->option.ocp_en)
+ return;
+
+ rtsx_pci_get_ocpstat(pcr, &pcr->ocp_stat);
+
+ if (pcr->ocp_stat & (SD_OC_NOW | SD_OC_EVER)) {
+ rts5261_clear_ocpstat(pcr);
+ rts5261_card_power_off(pcr, RTSX_SD_CARD);
+ rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, 0);
+ pcr->ocp_stat = 0;
+ }
+
+}
+
+static void rts5261_init_from_hw(struct rtsx_pcr *pcr)
+{
+ struct pci_dev *pdev = pcr->pci;
+ u32 lval1, lval2, i;
+ u16 setting_reg1, setting_reg2;
+ u8 valid, efuse_valid, tmp;
+
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ REG_EFUSE_POR | REG_EFUSE_POWER_MASK,
+ REG_EFUSE_POR | REG_EFUSE_POWERON);
+ udelay(1);
+ rtsx_pci_write_register(pcr, RTS5261_EFUSE_ADDR,
+ RTS5261_EFUSE_ADDR_MASK, 0x00);
+ rtsx_pci_write_register(pcr, RTS5261_EFUSE_CTL,
+ RTS5261_EFUSE_ENABLE | RTS5261_EFUSE_MODE_MASK,
+ RTS5261_EFUSE_ENABLE);
+
+ /* Wait transfer end */
+ for (i = 0; i < MAX_RW_REG_CNT; i++) {
+ rtsx_pci_read_register(pcr, RTS5261_EFUSE_CTL, &tmp);
+ if ((tmp & 0x80) == 0)
+ break;
+ }
+ rtsx_pci_read_register(pcr, RTS5261_EFUSE_READ_DATA, &tmp);
+ efuse_valid = ((tmp & 0x0C) >> 2);
+ pcr_dbg(pcr, "Load efuse valid: 0x%x\n", efuse_valid);
+
+ pci_read_config_dword(pdev, PCR_SETTING_REG2, &lval2);
+ pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, lval2);
+ /* 0x816 */
+ valid = (u8)((lval2 >> 16) & 0x03);
+
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ REG_EFUSE_POR, 0);
+ pcr_dbg(pcr, "Disable efuse por!\n");
+
+ if (efuse_valid == 2 || efuse_valid == 3) {
+ if (valid == 3) {
+ /* Bypass efuse */
+ setting_reg1 = PCR_SETTING_REG1;
+ setting_reg2 = PCR_SETTING_REG2;
+ } else {
+ /* Use efuse data */
+ setting_reg1 = PCR_SETTING_REG4;
+ setting_reg2 = PCR_SETTING_REG5;
+ }
+ } else if (efuse_valid == 0) {
+ // default
+ setting_reg1 = PCR_SETTING_REG1;
+ setting_reg2 = PCR_SETTING_REG2;
+ } else {
+ return;
+ }
+
+ pci_read_config_dword(pdev, setting_reg2, &lval2);
+ pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", setting_reg2, lval2);
+
+ if (!rts5261_vendor_setting_valid(lval2)) {
+ /* Not support MMC default */
+ pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
+ pcr_dbg(pcr, "skip fetch vendor setting\n");
+ return;
+ }
+
+ if (!rts5261_reg_check_mmc_support(lval2))
+ pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
+
+ pcr->rtd3_en = rts5261_reg_to_rtd3(lval2);
+
+ if (rts5261_reg_check_reverse_socket(lval2))
+ pcr->flags |= PCR_REVERSE_SOCKET;
+
+ pci_read_config_dword(pdev, setting_reg1, &lval1);
+ pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", setting_reg1, lval1);
+
+ pcr->aspm_en = rts5261_reg_to_aspm(lval1);
+ pcr->sd30_drive_sel_1v8 = rts5261_reg_to_sd30_drive_sel_1v8(lval1);
+ pcr->sd30_drive_sel_3v3 = rts5261_reg_to_sd30_drive_sel_3v3(lval1);
+
+ if (setting_reg1 == PCR_SETTING_REG1) {
+ /* store setting */
+ rtsx_pci_write_register(pcr, 0xFF0C, 0xFF, (u8)(lval1 & 0xFF));
+ rtsx_pci_write_register(pcr, 0xFF0D, 0xFF, (u8)((lval1 >> 8) & 0xFF));
+ rtsx_pci_write_register(pcr, 0xFF0E, 0xFF, (u8)((lval1 >> 16) & 0xFF));
+ rtsx_pci_write_register(pcr, 0xFF0F, 0xFF, (u8)((lval1 >> 24) & 0xFF));
+ rtsx_pci_write_register(pcr, 0xFF10, 0xFF, (u8)(lval2 & 0xFF));
+ rtsx_pci_write_register(pcr, 0xFF11, 0xFF, (u8)((lval2 >> 8) & 0xFF));
+ rtsx_pci_write_register(pcr, 0xFF12, 0xFF, (u8)((lval2 >> 16) & 0xFF));
+
+ pci_write_config_dword(pdev, PCR_SETTING_REG4, lval1);
+ lval2 = lval2 & 0x00FFFFFF;
+ pci_write_config_dword(pdev, PCR_SETTING_REG5, lval2);
+ }
+}
+
+static void rts5261_init_from_cfg(struct rtsx_pcr *pcr)
+{
+ struct rtsx_cr_option *option = &pcr->option;
+
+ if (option->ltr_en) {
+ if (option->ltr_enabled)
+ rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
+ }
+}
+
+static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
+{
+ struct rtsx_cr_option *option = &pcr->option;
+ u32 val;
+
+ rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
+ CD_RESUME_EN_MASK, CD_RESUME_EN_MASK);
+
+ rts5261_init_from_cfg(pcr);
+ rts5261_init_from_hw(pcr);
+
+ /* power off efuse */
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ REG_EFUSE_POWER_MASK, REG_EFUSE_POWEROFF);
+ rtsx_pci_write_register(pcr, L1SUB_CONFIG1,
+ AUX_CLK_ACTIVE_SEL_MASK, MAC_CKSW_DONE);
+ rtsx_pci_write_register(pcr, L1SUB_CONFIG3, 0xFF, 0);
+
+ if (is_version_higher_than(pcr, PID_5261, IC_VER_B)) {
+ val = rtsx_pci_readl(pcr, RTSX_DUM_REG);
+ rtsx_pci_writel(pcr, RTSX_DUM_REG, val | 0x1);
+ }
+ rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
+ RTS5261_AUX_CLK_16M_EN, 0);
+
+ /* Release PRSNT# */
+ rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
+ RTS5261_FORCE_PRSNT_LOW, 0);
+ rtsx_pci_write_register(pcr, FUNC_FORCE_CTL,
+ FUNC_FORCE_UPME_XMT_DBG, FUNC_FORCE_UPME_XMT_DBG);
+
+ rtsx_pci_write_register(pcr, PCLK_CTL,
+ PCLK_MODE_SEL, PCLK_MODE_SEL);
+
+ rtsx_pci_write_register(pcr, PM_EVENT_DEBUG, PME_DEBUG_0, PME_DEBUG_0);
+ rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, CLK_PM_EN, CLK_PM_EN);
+
+ /* LED shine disabled, set initial shine cycle period */
+ rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x0F, 0x02);
+
+ /* Configure driving */
+ rts5261_fill_driving(pcr, OUTPUT_3V3);
+
+ if (pcr->flags & PCR_REVERSE_SOCKET)
+ rtsx_pci_write_register(pcr, PETXCFG, 0x30, 0x30);
+ else
+ rtsx_pci_write_register(pcr, PETXCFG, 0x30, 0x00);
+
+ /*
+ * If u_force_clkreq_0 is enabled, CLKREQ# PIN will be forced
+ * to drive low, and we forcibly request clock.
+ */
+ if (option->force_clkreq_0)
+ rtsx_pci_write_register(pcr, PETXCFG,
+ FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_LOW);
+ else
+ rtsx_pci_write_register(pcr, PETXCFG,
+ FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
+
+ rtsx_pci_write_register(pcr, PWD_SUSPEND_EN, 0xFF, 0xFB);
+
+ if (pcr->rtd3_en) {
+ rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x01);
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ FORCE_PM_CONTROL | FORCE_PM_VALUE,
+ FORCE_PM_CONTROL | FORCE_PM_VALUE);
+ } else {
+ rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
+ rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+ FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+ }
+ rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, D3_DELINK_MODE_EN, 0x00);
+
+ /* Clear Enter RTD3_cold Information*/
+ rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
+ RTS5261_INFORM_RTD3_COLD, 0);
+
+ return 0;
+}
+
+static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)
+{
+ u8 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
+ u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
+
+ if (pcr->aspm_enabled == enable)
+ return;
+
+ val |= (pcr->aspm_en & 0x02);
+ rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
+ pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+ PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
+ pcr->aspm_enabled = enable;
+}
+
+static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
+{
+ u8 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
+ u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
+
+ if (pcr->aspm_enabled == enable)
+ return;
+
+ pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+ PCI_EXP_LNKCTL_ASPMC, 0);
+ rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
+ rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
+ udelay(10);
+ pcr->aspm_enabled = enable;
+}
+
+static void rts5261_set_aspm(struct rtsx_pcr *pcr, bool enable)
+{
+ if (enable)
+ rts5261_enable_aspm(pcr, true);
+ else
+ rts5261_disable_aspm(pcr, false);
+}
+
+static void rts5261_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
+{
+ struct rtsx_cr_option *option = &pcr->option;
+ int aspm_L1_1, aspm_L1_2;
+ u8 val = 0;
+
+ aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
+ aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
+
+ if (active) {
+ /* run, latency: 60us */
+ if (aspm_L1_1)
+ val = option->ltr_l1off_snooze_sspwrgate;
+ } else {
+ /* l1off, latency: 300us */
+ if (aspm_L1_2)
+ val = option->ltr_l1off_sspwrgate;
+ }
+
+ rtsx_set_l1off_sub(pcr, val);
+}
+
+static const struct pcr_ops rts5261_pcr_ops = {
+ .turn_on_led = rts5261_turn_on_led,
+ .turn_off_led = rts5261_turn_off_led,
+ .extra_init_hw = rts5261_extra_init_hw,
+ .enable_auto_blink = rts5261_enable_auto_blink,
+ .disable_auto_blink = rts5261_disable_auto_blink,
+ .card_power_on = rts5261_card_power_on,
+ .card_power_off = rts5261_card_power_off,
+ .switch_output_voltage = rts5261_switch_output_voltage,
+ .force_power_down = rts5261_force_power_down,
+ .stop_cmd = rts5261_stop_cmd,
+ .set_aspm = rts5261_set_aspm,
+ .set_l1off_cfg_sub_d0 = rts5261_set_l1off_cfg_sub_d0,
+ .enable_ocp = rts5261_enable_ocp,
+ .disable_ocp = rts5261_disable_ocp,
+ .init_ocp = rts5261_init_ocp,
+ .process_ocp = rts5261_process_ocp,
+ .clear_ocpstat = rts5261_clear_ocpstat,
+};
+
+static inline u8 double_ssc_depth(u8 depth)
+{
+ return ((depth > 1) ? (depth - 1) : depth);
+}
+
+int rts5261_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
+ u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
+{
+ int err, clk;
+ u16 n;
+ u8 clk_divider, mcu_cnt, div;
+ static const u8 depth[] = {
+ [RTSX_SSC_DEPTH_4M] = RTS5261_SSC_DEPTH_4M,
+ [RTSX_SSC_DEPTH_2M] = RTS5261_SSC_DEPTH_2M,
+ [RTSX_SSC_DEPTH_1M] = RTS5261_SSC_DEPTH_1M,
+ [RTSX_SSC_DEPTH_500K] = RTS5261_SSC_DEPTH_512K,
+ };
+
+ if (initial_mode) {
+ /* We use 250k(around) here, in initial stage */
+ if (is_version_higher_than(pcr, PID_5261, IC_VER_C)) {
+ clk_divider = SD_CLK_DIVIDE_256;
+ card_clock = 60000000;
+ } else {
+ clk_divider = SD_CLK_DIVIDE_128;
+ card_clock = 30000000;
+ }
+ } else {
+ clk_divider = SD_CLK_DIVIDE_0;
+ }
+ err = rtsx_pci_write_register(pcr, SD_CFG1,
+ SD_CLK_DIVIDE_MASK, clk_divider);
+ if (err < 0)
+ return err;
+
+ card_clock /= 1000000;
+ pcr_dbg(pcr, "Switch card clock to %dMHz\n", card_clock);
+
+ clk = card_clock;
+ if (!initial_mode && double_clk)
+ clk = card_clock * 2;
+ pcr_dbg(pcr, "Internal SSC clock: %dMHz (cur_clock = %d)\n",
+ clk, pcr->cur_clock);
+
+ if (clk == pcr->cur_clock)
+ return 0;
+
+ if (pcr->ops->conv_clk_and_div_n)
+ n = pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
+ else
+ n = clk - 4;
+ if ((clk <= 4) || (n > 396))
+ return -EINVAL;
+
+ mcu_cnt = 125/clk + 3;
+ if (mcu_cnt > 15)
+ mcu_cnt = 15;
+
+ div = CLK_DIV_1;
+ while ((n < MIN_DIV_N_PCR - 4) && (div < CLK_DIV_8)) {
+ if (pcr->ops->conv_clk_and_div_n) {
+ int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
+ DIV_N_TO_CLK) * 2;
+ n = pcr->ops->conv_clk_and_div_n(dbl_clk,
+ CLK_TO_DIV_N);
+ } else {
+ n = (n + 4) * 2 - 4;
+ }
+ div++;
+ }
+
+ n = (n / 2) - 1;
+ pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
+
+ ssc_depth = depth[ssc_depth];
+ if (double_clk)
+ ssc_depth = double_ssc_depth(ssc_depth);
+
+ if (ssc_depth) {
+ if (div == CLK_DIV_2) {
+ if (ssc_depth > 1)
+ ssc_depth -= 1;
+ else
+ ssc_depth = RTS5261_SSC_DEPTH_8M;
+ } else if (div == CLK_DIV_4) {
+ if (ssc_depth > 2)
+ ssc_depth -= 2;
+ else
+ ssc_depth = RTS5261_SSC_DEPTH_8M;
+ } else if (div == CLK_DIV_8) {
+ if (ssc_depth > 3)
+ ssc_depth -= 3;
+ else
+ ssc_depth = RTS5261_SSC_DEPTH_8M;
+ }
+ } else {
+ ssc_depth = 0;
+ }
+ pcr_dbg(pcr, "ssc_depth = %d\n", ssc_depth);
+
+ rtsx_pci_init_cmd(pcr);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
+ CLK_LOW_FREQ, CLK_LOW_FREQ);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
+ 0xFF, (div << 4) | mcu_cnt);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
+ SSC_DEPTH_MASK, ssc_depth);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
+ if (vpclk) {
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
+ PHASE_NOT_RESET, 0);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
+ PHASE_NOT_RESET, 0);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
+ PHASE_NOT_RESET, PHASE_NOT_RESET);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
+ PHASE_NOT_RESET, PHASE_NOT_RESET);
+ }
+
+ err = rtsx_pci_send_cmd(pcr, 2000);
+ if (err < 0)
+ return err;
+
+ /* Wait SSC clock stable */
+ udelay(SSC_CLOCK_STABLE_WAIT);
+ err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
+ if (err < 0)
+ return err;
+
+ pcr->cur_clock = clk;
+ return 0;
+
+}
+
+void rts5261_init_params(struct rtsx_pcr *pcr)
+{
+ struct rtsx_cr_option *option = &pcr->option;
+ struct rtsx_hw_param *hw_param = &pcr->hw_param;
+ u8 val;
+
+ pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
+ rtsx_pci_read_register(pcr, RTS5261_FW_STATUS, &val);
+ if (!(val & RTS5261_EXPRESS_LINK_FAIL_MASK))
+ pcr->extra_caps |= EXTRA_CAPS_SD_EXPRESS;
+ pcr->num_slots = 1;
+ pcr->ops = &rts5261_pcr_ops;
+
+ pcr->flags = 0;
+ pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
+ pcr->sd30_drive_sel_1v8 = 0x00;
+ pcr->sd30_drive_sel_3v3 = 0x00;
+ pcr->aspm_en = ASPM_L1_EN;
+ pcr->aspm_mode = ASPM_MODE_REG;
+ pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 11);
+ pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
+
+ pcr->ic_version = rts5261_get_ic_version(pcr);
+ pcr->sd_pull_ctl_enable_tbl = rts5261_sd_pull_ctl_enable_tbl;
+ pcr->sd_pull_ctl_disable_tbl = rts5261_sd_pull_ctl_disable_tbl;
+
+ pcr->reg_pm_ctrl3 = RTS5261_AUTOLOAD_CFG3;
+
+ option->dev_flags = (LTR_L1SS_PWR_GATE_CHECK_CARD_EN
+ | LTR_L1SS_PWR_GATE_EN);
+ option->ltr_en = true;
+
+ /* init latency of active, idle, L1OFF to 60us, 300us, 3ms */
+ option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
+ option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
+ option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
+ option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
+ option->ltr_l1off_sspwrgate = 0x7F;
+ option->ltr_l1off_snooze_sspwrgate = 0x78;
+
+ option->ocp_en = 1;
+ hw_param->interrupt_en |= SD_OC_INT_EN;
+ hw_param->ocp_glitch = SD_OCP_GLITCH_800U;
+ option->sd_800mA_ocp_thd = RTS5261_LDO1_OCP_THD_1040;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 07:08:51 +0000