[PATCH v2 4/4] misc: rtsx: rts5249 support runtime PM

From: ricky_wu
Date: Wed Dec 02 2020 - 02:00:46 EST

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From: Ricky Wu <ricky_wu@xxxxxxxxxxx>

rtsx_pcr:
add callback functions to support runtime PM
add delay_work to put device to D3 after idle
over 10 sec

rts5249:
add extra init flow for rtd3 and set rtd3_en from
config setting

rtsx_pci_sdmmc:
child device support autosuspend

Signed-off-by: Ricky Wu <ricky_wu@xxxxxxxxxxx>
---
drivers/misc/cardreader/rts5249.c | 26 +++++--
drivers/misc/cardreader/rtsx_pcr.c | 106 ++++++++++++++++++++++++++++-
drivers/misc/cardreader/rtsx_pcr.h | 1 +
drivers/mmc/host/rtsx_pci_sdmmc.c | 16 +++++
include/linux/rtsx_pci.h | 2 +
5 files changed, 145 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/cardreader/rts5249.c b/drivers/misc/cardreader/rts5249.c
index b85279f1fc5e..b2676e7f5027 100644
--- a/drivers/misc/cardreader/rts5249.c
+++ b/drivers/misc/cardreader/rts5249.c
@@ -73,6 +73,9 @@ 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 (rtsx_check_mmc_support(reg))
pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg);
@@ -278,15 +281,28 @@ 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_PM_CTRL3, 0x01, 0x00);
- rtsx_pci_write_register(pcr, RTS524A_PME_FORCE_CTL, 0x30, 0x20);
+
+ if (pcr->rtd3_en) {
+ if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A)) {
+ rtsx_pci_write_register(pcr, RTS524A_PM_CTRL3, 0x01, 0x01);
+ rtsx_pci_write_register(pcr, RTS524A_PME_FORCE_CTL, 0x30, 0x30);
+ } else {
+ rtsx_pci_write_register(pcr, PM_CTRL3, 0x01, 0x01);
+ rtsx_pci_write_register(pcr, PME_FORCE_CTL, 0xFF, 0x33);
+ }
} else {
- rtsx_pci_write_register(pcr, PME_FORCE_CTL, 0xFF, 0x30);
- rtsx_pci_write_register(pcr, PM_CTRL3, 0x01, 0x00);
+ if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A)) {
+ rtsx_pci_write_register(pcr, RTS524A_PM_CTRL3, 0x01, 0x00);
+ rtsx_pci_write_register(pcr, RTS524A_PME_FORCE_CTL, 0x30, 0x20);
+ } else {
+ rtsx_pci_write_register(pcr, PME_FORCE_CTL, 0xFF, 0x30);
+ rtsx_pci_write_register(pcr, PM_CTRL3, 0x01, 0x00);
+ }
}

+
/*
* If u_force_clkreq_0 is enabled, CLKREQ# PIN will be forced
* to drive low, and we forcibly request clock.
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index 3612063cab09..2700d1997750 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -20,6 +20,8 @@
#include <linux/rtsx_pci.h>
#include <linux/mmc/card.h>
#include <asm/unaligned.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>

#include "rtsx_pcr.h"
#include "rts5261.h"
@@ -150,6 +152,12 @@ 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)
@@ -1081,6 +1089,16 @@ static void rtsx_pm_power_saving(struct rtsx_pcr *pcr)
rtsx_comm_pm_power_saving(pcr);
}

+static void rtsx_pci_rtd3_work(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, rtd3_work);
+
+ pcr_dbg(pcr, "--> %s\n", __func__);
+ if (!pcr->is_runtime_suspended)
+ pm_runtime_put(&(pcr->pci->dev));
+}
+
static void rtsx_pci_idle_work(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
@@ -1100,6 +1118,9 @@ static void rtsx_pci_idle_work(struct work_struct *work)
rtsx_pm_power_saving(pcr);

mutex_unlock(&pcr->pcr_mutex);
+
+ if (pcr->rtd3_en)
+ mod_delayed_work(system_wq, &pcr->rtd3_work, msecs_to_jiffies(10000));
}

static void rtsx_base_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
@@ -1579,6 +1600,15 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
rtsx_pcr_cells[i].platform_data = handle;
rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
}
+
+ if (pcr->rtd3_en) {
+ INIT_DELAYED_WORK(&pcr->rtd3_work, rtsx_pci_rtd3_work);
+ pm_runtime_allow(&pcidev->dev);
+ pm_runtime_enable(&pcidev->dev);
+ pcr->is_runtime_suspended = false;
+ }
+
+
ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
if (ret < 0)
@@ -1616,6 +1646,9 @@ static void rtsx_pci_remove(struct pci_dev *pcidev)
struct pcr_handle *handle = pci_get_drvdata(pcidev);
struct rtsx_pcr *pcr = handle->pcr;

+ if (pcr->rtd3_en)
+ pm_runtime_get_noresume(&pcr->pci->dev);
+
pcr->remove_pci = true;

/* Disable interrupts at the pcr level */
@@ -1626,6 +1659,8 @@ static void rtsx_pci_remove(struct pci_dev *pcidev)

cancel_delayed_work_sync(&pcr->carddet_work);
cancel_delayed_work_sync(&pcr->idle_work);
+ if (pcr->rtd3_en)
+ cancel_delayed_work_sync(&pcr->rtd3_work);

mfd_remove_devices(&pcidev->dev);

@@ -1643,6 +1678,11 @@ static void rtsx_pci_remove(struct pci_dev *pcidev)
idr_remove(&rtsx_pci_idr, pcr->id);
spin_unlock(&rtsx_pci_lock);

+ if (pcr->rtd3_en) {
+ pm_runtime_disable(&pcr->pci->dev);
+ pm_runtime_put_noidle(&pcr->pci->dev);
+ }
+
kfree(pcr->slots);
kfree(pcr);
kfree(handle);
@@ -1724,13 +1764,77 @@ static void rtsx_pci_shutdown(struct pci_dev *pcidev)
pci_disable_msi(pcr->pci);
}

+static int rtsx_pci_runtime_suspend(struct device *device)
+{
+ struct pci_dev *pcidev = to_pci_dev(device);
+ struct pcr_handle *handle;
+ struct rtsx_pcr *pcr;
+
+ handle = pci_get_drvdata(pcidev);
+ pcr = handle->pcr;
+ dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
+
+ 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);
+
+ free_irq(pcr->irq, (void *)pcr);
+
+ mutex_unlock(&pcr->pcr_mutex);
+
+ pcr->is_runtime_suspended = true;
+
+ return 0;
+}
+
+static int rtsx_pci_runtime_resume(struct device *device)
+{
+ struct pci_dev *pcidev = to_pci_dev(device);
+ struct pcr_handle *handle;
+ struct rtsx_pcr *pcr;
+ int ret = 0;
+
+ handle = pci_get_drvdata(pcidev);
+ pcr = handle->pcr;
+ dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
+
+ mutex_lock(&pcr->pcr_mutex);
+
+ rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
+ rtsx_pci_acquire_irq(pcr);
+ synchronize_irq(pcr->irq);
+
+ if (pcr->ops->fetch_vendor_settings)
+ pcr->ops->fetch_vendor_settings(pcr);
+
+ rtsx_pci_init_hw(pcr);
+
+ if (pcr->slots[RTSX_SD_CARD].p_dev != NULL) {
+ pcr->slots[RTSX_SD_CARD].card_event(
+ pcr->slots[RTSX_SD_CARD].p_dev);
+ }
+
+ schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
+
+ mutex_unlock(&pcr->pcr_mutex);
+ return ret;
+}
+
#else /* CONFIG_PM */

#define rtsx_pci_shutdown NULL
+#define rtsx_pci_runtime_suspend NULL
+#define rtsx_pic_runtime_resume NULL

#endif /* CONFIG_PM */

-static SIMPLE_DEV_PM_OPS(rtsx_pci_pm_ops, rtsx_pci_suspend, rtsx_pci_resume);
+static const struct dev_pm_ops rtsx_pci_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(rtsx_pci_suspend, rtsx_pci_resume)
+ SET_RUNTIME_PM_OPS(rtsx_pci_runtime_suspend, rtsx_pci_runtime_resume, NULL)
+};

static struct pci_driver rtsx_pci_driver = {
.name = DRV_NAME_RTSX_PCI,
diff --git a/drivers/misc/cardreader/rtsx_pcr.h b/drivers/misc/cardreader/rtsx_pcr.h
index fe5f4ca0f937..daf057c4eea6 100644
--- a/drivers/misc/cardreader/rtsx_pcr.h
+++ b/drivers/misc/cardreader/rtsx_pcr.h
@@ -90,6 +90,7 @@ static inline u8 map_sd_drive(int idx)

#define rtsx_check_mmc_support(reg) ((reg) & 0x10)
#define rtsx_reg_to_rtd3(reg) ((reg) & 0x02)
+#define rtsx_reg_to_rtd3_uhsii(reg) ((reg) & 0x04)
#define rtsx_reg_to_aspm(reg) (((reg) >> 28) & 0x03)
#define rtsx_reg_to_sd30_drive_sel_1v8(reg) (((reg) >> 26) & 0x03)
#define rtsx_reg_to_sd30_drive_sel_3v3(reg) (((reg) >> 5) & 0x03)
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 93be9fa97098..94cdd3b322b5 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -20,6 +20,7 @@
#include <linux/mmc/card.h>
#include <linux/rtsx_pci.h>
#include <asm/unaligned.h>
+#include <linux/pm_runtime.h>

struct realtek_pci_sdmmc {
struct platform_device *pdev;
@@ -1343,6 +1344,7 @@ static void init_extra_caps(struct realtek_pci_sdmmc *host)
static void realtek_init_host(struct realtek_pci_sdmmc *host)
{
struct mmc_host *mmc = host->mmc;
+ struct rtsx_pcr *pcr = host->pcr;

mmc->f_min = 250000;
mmc->f_max = 208000000;
@@ -1350,6 +1352,8 @@ static void realtek_init_host(struct realtek_pci_sdmmc *host)
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
+ if (pcr->rtd3_en)
+ mmc->caps = mmc->caps | MMC_CAP_AGGRESSIVE_PM;
mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
mmc->max_current_330 = 400;
mmc->max_current_180 = 800;
@@ -1407,6 +1411,13 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)

realtek_init_host(host);

+ if (pcr->rtd3_en) {
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 5000);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ }
+
+
mmc_add_host(mmc);

return 0;
@@ -1426,6 +1437,11 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
pcr->slots[RTSX_SD_CARD].card_event = NULL;
mmc = host->mmc;

+ if (pcr->rtd3_en) {
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ }
+
cancel_work_sync(&host->work);

mutex_lock(&host->host_mutex);
diff --git a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h
index 745f5e73f99a..f895ccabbe29 100644
--- a/include/linux/rtsx_pci.h
+++ b/include/linux/rtsx_pci.h
@@ -1174,6 +1174,7 @@ struct rtsx_pcr {

struct delayed_work carddet_work;
struct delayed_work idle_work;
+ struct delayed_work rtd3_work;

spinlock_t lock;
struct mutex pcr_mutex;
@@ -1183,6 +1184,7 @@ struct rtsx_pcr {
unsigned int cur_clock;
bool remove_pci;
bool msi_en;
+ bool is_runtime_suspended;

#define EXTRA_CAPS_SD_SDR50 (1 << 0)
#define EXTRA_CAPS_SD_SDR104 (1 << 1)
--
2.17.1

Next message: Joel Stanley: "Re: [PATCH v2 3/3] edac: Supporting AST2400 and AST2600 edac driver"
Previous message: Dan Carpenter: "[PATCH net-next] octeontx2-af: debugfs: delete dead code"
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