Commit 5b4258f6 authored by Ricky Wu's avatar Ricky Wu Committed by Greg Kroah-Hartman
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misc: rtsx: rts5249 support runtime PM 



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: default avatarRicky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/20201202065857.19412-1-ricky_wu@realtek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 121e9c6b

drivers/misc/cardreader/rts5249.c

+21 −5
Original line number Diff line number Diff line
@@ -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);
@@ -278,14 +281,27 @@ 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);



	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 {

		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

drivers/misc/cardreader/rtsx_pcr.c

+105 −1
Original line number Diff line number Diff line
@@ -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,

drivers/misc/cardreader/rtsx_pcr.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

drivers/mmc/host/rtsx_pci_sdmmc.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/rtsx_pci.h

+2 −0
Original line number Diff line number Diff line
@@ -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)