Date:   Thu, 13 Jan 2022 10:50:41 +0000
From:   Ricky WU <ricky_wu@...ltek.com>
To:     "arnd@...db.de" <arnd@...db.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Ricky WU <ricky_wu@...ltek.com>,
        "christophe.jaillet@...adoo.fr" <christophe.jaillet@...adoo.fr>,
        "kai.heng.feng@...onical.com" <kai.heng.feng@...onical.com>,
        "yang.lee@...ux.alibaba.com" <yang.lee@...ux.alibaba.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] misc: rtsx: modify rtd3 flow

move pm_runtime_get() to _runtime_resume
when System enter S3, do not have sd_request and do not
call start_run to pm_runtime_get() cause is_runtime_suspended status
not correct

set more register in power_down flow to make plugin or unplug
card do not wake up system when system is at S3

Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
---
 drivers/misc/cardreader/rts5249.c  | 31 ++++++++++++++++++++++++++++--
 drivers/misc/cardreader/rtsx_pcr.c | 17 ++++++++--------
 drivers/misc/cardreader/rtsx_pcr.h |  1 +
 3 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/drivers/misc/cardreader/rts5249.c b/drivers/misc/cardreader/rts5249.c
index 53f3a1f45c4a..69e32f075ca9 100644
--- a/drivers/misc/cardreader/rts5249.c
+++ b/drivers/misc/cardreader/rts5249.c
@@ -74,7 +74,8 @@ static void rtsx_base_fetch_vendor_settings(struct rtsx_pcr *pcr)
 	pci_read_config_dword(pdev, PCR_SETTING_REG2, &reg);
 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
 
-	pcr->rtd3_en = rtsx_reg_to_rtd3_uhsii(reg);
+	if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A))
+		pcr->rtd3_en = rtsx_reg_to_rtd3_uhsii(reg);
 
 	if (rtsx_check_mmc_support(reg))
 		pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
@@ -143,6 +144,27 @@ static int rts5249_init_from_hw(struct rtsx_pcr *pcr)
 	return 0;
 }
 
+static void rts52xa_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
+{
+	/* 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);
+
+	rtsx_pci_write_register(pcr, RTS524A_PM_CTRL3,
+			D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
+
+	if (!pcr->is_runtime_suspended) {
+		rtsx_pci_write_register(pcr, RTS524A_AUTOLOAD_CFG1,
+				CD_RESUME_EN_MASK, 0);
+		rtsx_pci_write_register(pcr, RTS524A_PM_CTRL3, 0x01, 0x00);
+		rtsx_pci_write_register(pcr, RTS524A_PME_FORCE_CTL, 0x30, 0x20);
+	}
+
+	rtsx_pci_write_register(pcr, FPDCTL, ALL_POWER_DOWN, ALL_POWER_DOWN);
+}
+
 static void rts52xa_save_content_from_efuse(struct rtsx_pcr *pcr)
 {
 	u8 cnt, sv;
@@ -281,8 +303,11 @@ static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
 
 	rtsx_pci_send_cmd(pcr, CMD_TIMEOUT_DEF);
 
-	if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A))
+	if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A)) {
 		rtsx_pci_write_register(pcr, REG_VREF, PWD_SUSPND_EN, PWD_SUSPND_EN);
+		rtsx_pci_write_register(pcr, RTS524A_AUTOLOAD_CFG1,
+			CD_RESUME_EN_MASK, CD_RESUME_EN_MASK);
+	}
 
 	if (pcr->rtd3_en) {
 		if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A)) {
@@ -724,6 +749,7 @@ static const struct pcr_ops rts524a_pcr_ops = {
 	.card_power_on = rtsx_base_card_power_on,
 	.card_power_off = rtsx_base_card_power_off,
 	.switch_output_voltage = rtsx_base_switch_output_voltage,
+	.force_power_down = rts52xa_force_power_down,
 	.set_l1off_cfg_sub_d0 = rts5250_set_l1off_cfg_sub_d0,
 };
 
@@ -841,6 +867,7 @@ static const struct pcr_ops rts525a_pcr_ops = {
 	.card_power_on = rts525a_card_power_on,
 	.card_power_off = rtsx_base_card_power_off,
 	.switch_output_voltage = rts525a_switch_output_voltage,
+	.force_power_down = rts52xa_force_power_down,
 	.set_l1off_cfg_sub_d0 = rts5250_set_l1off_cfg_sub_d0,
 };
 
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index 6ac509c1821c..a83adfb122dc 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -152,12 +152,6 @@ void rtsx_pci_start_run(struct rtsx_pcr *pcr)
 	if (pcr->remove_pci)
 		return;
 
-	if (pcr->rtd3_en)
-		if (pcr->is_runtime_suspended) {
-			pm_runtime_get(&(pcr->pci->dev));
-			pcr->is_runtime_suspended = false;
-		}
-
 	if (pcr->state != PDEV_STAT_RUN) {
 		pcr->state = PDEV_STAT_RUN;
 		if (pcr->ops->enable_auto_blink)
@@ -1597,6 +1591,7 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
 	pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
 	pcr->card_inserted = 0;
 	pcr->card_removed = 0;
+	pcr->rtd3_en = 0;
 	INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
 	INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
 
@@ -1796,17 +1791,16 @@ static int rtsx_pci_runtime_suspend(struct device *device)
 	pcr = handle->pcr;
 	dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
 
+	pcr->is_runtime_suspended = true;
+
 	cancel_delayed_work(&pcr->carddet_work);
 	cancel_delayed_work(&pcr->rtd3_work);
 	cancel_delayed_work(&pcr->idle_work);
 
 	mutex_lock(&pcr->pcr_mutex);
 	rtsx_pci_power_off(pcr, HOST_ENTER_S3);
-
 	mutex_unlock(&pcr->pcr_mutex);
 
-	pcr->is_runtime_suspended = true;
-
 	return 0;
 }
 
@@ -1820,6 +1814,11 @@ static int rtsx_pci_runtime_resume(struct device *device)
 	pcr = handle->pcr;
 	dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
 
+	if (pcr->is_runtime_suspended) {
+		pm_runtime_get(&(pcr->pci->dev));
+		pcr->is_runtime_suspended = false;
+	}
+
 	mutex_lock(&pcr->pcr_mutex);
 
 	rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
diff --git a/drivers/misc/cardreader/rtsx_pcr.h b/drivers/misc/cardreader/rtsx_pcr.h
index daf057c4eea6..b93975268e6d 100644
--- a/drivers/misc/cardreader/rtsx_pcr.h
+++ b/drivers/misc/cardreader/rtsx_pcr.h
@@ -25,6 +25,7 @@
 #define REG_EFUSE_POWEROFF		0x00
 #define RTS5250_CLK_CFG3		0xFF79
 #define RTS525A_CFG_MEM_PD		0xF0
+#define RTS524A_AUTOLOAD_CFG1	0xFF7C
 #define RTS524A_PM_CTRL3		0xFF7E
 #define RTS525A_BIOS_CFG		0xFF2D
 #define RTS525A_LOAD_BIOS_FLAG	0x01
-- 
2.25.1

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