[PATCH v2 0/6] mmc: sdhci-pci: Add some CD GPIO related quirks

[PATCH v2 0/6] mmc: sdhci-pci: Add some CD GPIO related quirks

[Andy Shevchenko]

It appears that one of the supported platform magically worked with the
custom IRQ handler (any hints how?) while having two PCB designs with
an opposite CD sense level. Here is an attempt to fix it by quirking out
CD GPIO.

Patch 1 is an actual fix for the mentioned platform.
Patch 2 is code deduplication to save few LOCs.
Patch 3-6 are dead code removals.

In v2:
- redone fix to use ->get_cd() instead of quirks (Adrian)
- due to above transformed previous clean up to the current patch 2
- added a new patch, i.e. patch 3
- added commit IDs to patch 4 (Adrian)
- mentioned dependencies on previous patches in patch 5 and 6 (Adrian)

Andy Shevchenko (6):
  mmc: sdhci-pci: Read card detect from ACPI for Intel Merrifield
  mmc: sdhci: Deduplicate sdhci_get_cd_nogpio()
  mmc: sdhci: Remove unused prototype declaration in the header
  mmc: sdhci-pci: Remove dead code (struct sdhci_pci_data et al)
  mmc: sdhci-pci: Remove dead code (cd_gpio, cd_irq et al)
  mmc: sdhci-pci: Remove dead code (rst_n_gpio et al)

 drivers/mmc/host/Makefile          |   1 -
 drivers/mmc/host/sdhci-acpi.c      |  14 +--
 drivers/mmc/host/sdhci-pci-core.c  | 159 ++++-------------------------
 drivers/mmc/host/sdhci-pci-data.c  |   6 --
 drivers/mmc/host/sdhci-pci.h       |   5 -
 drivers/mmc/host/sdhci.c           |  19 ++++
 drivers/mmc/host/sdhci.h           |   2 +-
 include/linux/mmc/sdhci-pci-data.h |  18 ----
 8 files changed, 39 insertions(+), 185 deletions(-)
 delete mode 100644 drivers/mmc/host/sdhci-pci-data.c
 delete mode 100644 include/linux/mmc/sdhci-pci-data.h

-- 
2.33.0

[PATCH v2 1/6] mmc: sdhci-pci: Read card detect from ACPI for Intel Merrifield

[Andy Shevchenko]

Intel Merrifield platform had been converted to use ACPI enumeration.
However, the driver missed an update to retrieve card detect GPIO.
Fix it here.

Unfortunately we can't rely on CD GPIO state because there are two
different PCB designs in the wild that are using the opposite card
detection sense and there is no way to distinguish those platforms,
that's why ignore CD GPIO completely and use it only as an event.

Fixes: 4590d98f5a4f ("sfi: Remove framework for deprecated firmware")
BugLink: https://github.com/edison-fw/meta-intel-edison/issues/135
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mmc/host/sdhci-pci-core.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index be19785227fe..d0f2edfe296c 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -616,16 +616,12 @@ static int intel_select_drive_strength(struct mmc_card *card,
 	return intel_host->drv_strength;
 }
 
-static int bxt_get_cd(struct mmc_host *mmc)
+static int sdhci_get_cd_nogpio(struct mmc_host *mmc)
 {
-	int gpio_cd = mmc_gpio_get_cd(mmc);
 	struct sdhci_host *host = mmc_priv(mmc);
 	unsigned long flags;
 	int ret = 0;
 
-	if (!gpio_cd)
-		return 0;
-
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (host->flags & SDHCI_DEVICE_DEAD)
@@ -638,6 +634,21 @@ static int bxt_get_cd(struct mmc_host *mmc)
 	return ret;
 }
 
+static int bxt_get_cd(struct mmc_host *mmc)
+{
+	int gpio_cd = mmc_gpio_get_cd(mmc);
+
+	if (!gpio_cd)
+		return 0;
+
+	return sdhci_get_cd_nogpio(mmc);
+}
+
+static int mrfld_get_cd(struct mmc_host *mmc)
+{
+	return sdhci_get_cd_nogpio(mmc);
+}
+
 #define SDHCI_INTEL_PWR_TIMEOUT_CNT	20
 #define SDHCI_INTEL_PWR_TIMEOUT_UDELAY	100
 
@@ -1341,6 +1352,14 @@ static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
 					 MMC_CAP_1_8V_DDR;
 		break;
 	case INTEL_MRFLD_SD:
+		slot->cd_idx = 0;
+		slot->cd_override_level = true;
+		/*
+		 * There are two PCB designs of SD card slot with the opposite
+		 * card detection sense. Quirk this out by ignoring GPIO state
+		 * completely in the custom ->get_cd() callback.
+		 */
+		slot->host->mmc_host_ops.get_cd = mrfld_get_cd;
 		slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
 		break;
 	case INTEL_MRFLD_SDIO:
-- 
2.33.0

[PATCH v2 2/6] mmc: sdhci: Deduplicate sdhci_get_cd_nogpio()

[Andy Shevchenko]

The analogue of the sdhci_get_cd_nogpio() is used in the sdhci-pci-core
and sdhci-acpi modules. Deduplicate it by moving to sdhci and exporting.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mmc/host/sdhci-acpi.c     | 14 +-------------
 drivers/mmc/host/sdhci-pci-core.c | 18 ------------------
 drivers/mmc/host/sdhci.c          | 19 +++++++++++++++++++
 drivers/mmc/host/sdhci.h          |  1 +
 4 files changed, 21 insertions(+), 31 deletions(-)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 8fe65f172a61..f1ef0d28b0dd 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -362,23 +362,11 @@ static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
 static int bxt_get_cd(struct mmc_host *mmc)
 {
 	int gpio_cd = mmc_gpio_get_cd(mmc);
-	struct sdhci_host *host = mmc_priv(mmc);
-	unsigned long flags;
-	int ret = 0;
 
 	if (!gpio_cd)
 		return 0;
 
-	spin_lock_irqsave(&host->lock, flags);
-
-	if (host->flags & SDHCI_DEVICE_DEAD)
-		goto out;
-
-	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
-out:
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	return ret;
+	return sdhci_get_cd_nogpio(mmc);
 }
 
 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index d0f2edfe296c..19e13dfae593 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -616,24 +616,6 @@ static int intel_select_drive_strength(struct mmc_card *card,
 	return intel_host->drv_strength;
 }
 
-static int sdhci_get_cd_nogpio(struct mmc_host *mmc)
-{
-	struct sdhci_host *host = mmc_priv(mmc);
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&host->lock, flags);
-
-	if (host->flags & SDHCI_DEVICE_DEAD)
-		goto out;
-
-	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
-out:
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	return ret;
-}
-
 static int bxt_get_cd(struct mmc_host *mmc)
 {
 	int gpio_cd = mmc_gpio_get_cd(mmc);
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 357b365bf0ec..1f4b052f6f27 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2419,6 +2419,25 @@ static int sdhci_get_cd(struct mmc_host *mmc)
 	return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 }
 
+int sdhci_get_cd_nogpio(struct mmc_host *mmc)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	if (host->flags & SDHCI_DEVICE_DEAD)
+		goto out;
+
+	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
+out:
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_get_cd_nogpio);
+
 static int sdhci_check_ro(struct sdhci_host *host)
 {
 	unsigned long flags;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index e8d04e42a5af..c593af479832 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -775,6 +775,7 @@ void sdhci_set_power_and_bus_voltage(struct sdhci_host *host,
 				     unsigned short vdd);
 void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
 			   unsigned short vdd);
+int sdhci_get_cd_nogpio(struct mmc_host *mmc);
 void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
 int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
 void sdhci_set_bus_width(struct sdhci_host *host, int width);
-- 
2.33.0

[PATCH v2 3/6] mmc: sdhci: Remove unused prototype declaration in the header

[Andy Shevchenko]

sdhci_card_detect() is not defined anywhere. Remove it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mmc/host/sdhci.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c593af479832..bb883553d3b4 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -750,7 +750,6 @@ static inline void *sdhci_priv(struct sdhci_host *host)
 	return host->private;
 }
 
-void sdhci_card_detect(struct sdhci_host *host);
 void __sdhci_read_caps(struct sdhci_host *host, const u16 *ver,
 		       const u32 *caps, const u32 *caps1);
 int sdhci_setup_host(struct sdhci_host *host);
-- 
2.33.0

[PATCH v2 4/6] mmc: sdhci-pci: Remove dead code (struct sdhci_pci_data et al)

[Andy Shevchenko]

The last user of this struct gone couple of releases ago. Besides that
there were not so many users of this API for 10+ years: one is implied
above Intel Merrifield (added 20160831 by 3976b0380b31, removed 20210211
by 4590d98f5a4f), and another is Intel Sunrisepoint (added 20150206 by
e1bfad6d936d, removed 20170320 by 51ced59cc02e).

Effectively this is a revert of the commit 52c506f0bc72 ("mmc: sdhci-pci:
add platform data").

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mmc/host/Makefile          |  1 -
 drivers/mmc/host/sdhci-pci-core.c  | 31 ++++--------------------------
 drivers/mmc/host/sdhci-pci-data.c  |  6 ------
 drivers/mmc/host/sdhci-pci.h       |  1 -
 include/linux/mmc/sdhci-pci-data.h | 18 -----------------
 5 files changed, 4 insertions(+), 53 deletions(-)
 delete mode 100644 drivers/mmc/host/sdhci-pci-data.c
 delete mode 100644 include/linux/mmc/sdhci-pci-data.h

diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 14004cc09aaa..ea36d379bd3c 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -14,7 +14,6 @@ obj-$(CONFIG_MMC_SDHCI)		+= sdhci.o
 obj-$(CONFIG_MMC_SDHCI_PCI)	+= sdhci-pci.o
 sdhci-pci-y			+= sdhci-pci-core.o sdhci-pci-o2micro.o sdhci-pci-arasan.o \
 				   sdhci-pci-dwc-mshc.o sdhci-pci-gli.o
-obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI))	+= sdhci-pci-data.o
 obj-$(CONFIG_MMC_SDHCI_ACPI)	+= sdhci-acpi.o
 obj-$(CONFIG_MMC_SDHCI_PXAV3)	+= sdhci-pxav3.o
 obj-$(CONFIG_MMC_SDHCI_PXAV2)	+= sdhci-pxav2.o
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 19e13dfae593..8938c63b1e77 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -17,8 +17,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
 #include <linux/device.h>
-#include <linux/mmc/host.h>
-#include <linux/mmc/mmc.h>
 #include <linux/scatterlist.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
@@ -26,11 +24,13 @@
 #include <linux/pm_runtime.h>
 #include <linux/pm_qos.h>
 #include <linux/debugfs.h>
-#include <linux/mmc/slot-gpio.h>
-#include <linux/mmc/sdhci-pci-data.h>
 #include <linux/acpi.h>
 #include <linux/dmi.h>
 
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/slot-gpio.h>
+
 #ifdef CONFIG_X86
 #include <asm/iosf_mbi.h>
 #endif
@@ -2131,22 +2131,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 	slot->cd_gpio = -EINVAL;
 	slot->cd_idx = -1;
 
-	/* Retrieve platform data if there is any */
-	if (*sdhci_pci_get_data)
-		slot->data = sdhci_pci_get_data(pdev, slotno);
-
-	if (slot->data) {
-		if (slot->data->setup) {
-			ret = slot->data->setup(slot->data);
-			if (ret) {
-				dev_err(&pdev->dev, "platform setup failed\n");
-				goto free;
-			}
-		}
-		slot->rst_n_gpio = slot->data->rst_n_gpio;
-		slot->cd_gpio = slot->data->cd_gpio;
-	}
-
 	host->hw_name = "PCI";
 	host->ops = chip->fixes && chip->fixes->ops ?
 		    chip->fixes->ops :
@@ -2233,10 +2217,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 		chip->fixes->remove_slot(slot, 0);
 
 cleanup:
-	if (slot->data && slot->data->cleanup)
-		slot->data->cleanup(slot->data);
-
-free:
 	sdhci_free_host(host);
 
 	return ERR_PTR(ret);
@@ -2259,9 +2239,6 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 	if (slot->chip->fixes && slot->chip->fixes->remove_slot)
 		slot->chip->fixes->remove_slot(slot, dead);
 
-	if (slot->data && slot->data->cleanup)
-		slot->data->cleanup(slot->data);
-
 	sdhci_free_host(slot->host);
 }
 
diff --git a/drivers/mmc/host/sdhci-pci-data.c b/drivers/mmc/host/sdhci-pci-data.c
deleted file mode 100644
index 18638fb363d8..000000000000
--- a/drivers/mmc/host/sdhci-pci-data.c
+++ /dev/null
@@ -1,6 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/module.h>
-#include <linux/mmc/sdhci-pci-data.h>
-
-struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev, int slotno);
-EXPORT_SYMBOL_GPL(sdhci_pci_get_data);
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index 8f90c4163bb5..15b36cd47860 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -156,7 +156,6 @@ struct sdhci_pci_fixes {
 struct sdhci_pci_slot {
 	struct sdhci_pci_chip	*chip;
 	struct sdhci_host	*host;
-	struct sdhci_pci_data	*data;
 
 	int			rst_n_gpio;
 	int			cd_gpio;
diff --git a/include/linux/mmc/sdhci-pci-data.h b/include/linux/mmc/sdhci-pci-data.h
deleted file mode 100644
index 1d42872d22f3..000000000000
--- a/include/linux/mmc/sdhci-pci-data.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef LINUX_MMC_SDHCI_PCI_DATA_H
-#define LINUX_MMC_SDHCI_PCI_DATA_H
-
-struct pci_dev;
-
-struct sdhci_pci_data {
-	struct pci_dev	*pdev;
-	int		slotno;
-	int		rst_n_gpio; /* Set to -EINVAL if unused */
-	int		cd_gpio;    /* Set to -EINVAL if unused */
-	int		(*setup)(struct sdhci_pci_data *data);
-	void		(*cleanup)(struct sdhci_pci_data *data);
-};
-
-extern struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev,
-				int slotno);
-#endif
-- 
2.33.0

[PATCH v2 5/6] mmc: sdhci-pci: Remove dead code (cd_gpio, cd_irq et al)

[Andy Shevchenko]

The last user of this struct gone couple of releases ago.
Remove the dead code for good and encourage people to use
MMC core functionality for that.

The removal is dependent on the previous removal of the
struct sdhci_pci_data.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mmc/host/sdhci-pci-core.c | 76 +------------------------------
 drivers/mmc/host/sdhci-pci.h      |  2 -
 2 files changed, 1 insertion(+), 77 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 8938c63b1e77..e2b6f60e9f01 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -345,73 +345,6 @@ static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
 	return 0;
 }
 
-#ifdef CONFIG_PM
-
-static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
-{
-	struct sdhci_pci_slot *slot = dev_id;
-	struct sdhci_host *host = slot->host;
-
-	mmc_detect_change(host->mmc, msecs_to_jiffies(200));
-	return IRQ_HANDLED;
-}
-
-static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
-{
-	int err, irq, gpio = slot->cd_gpio;
-
-	slot->cd_gpio = -EINVAL;
-	slot->cd_irq = -EINVAL;
-
-	if (!gpio_is_valid(gpio))
-		return;
-
-	err = devm_gpio_request(&slot->chip->pdev->dev, gpio, "sd_cd");
-	if (err < 0)
-		goto out;
-
-	err = gpio_direction_input(gpio);
-	if (err < 0)
-		goto out_free;
-
-	irq = gpio_to_irq(gpio);
-	if (irq < 0)
-		goto out_free;
-
-	err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
-			  IRQF_TRIGGER_FALLING, "sd_cd", slot);
-	if (err)
-		goto out_free;
-
-	slot->cd_gpio = gpio;
-	slot->cd_irq = irq;
-
-	return;
-
-out_free:
-	devm_gpio_free(&slot->chip->pdev->dev, gpio);
-out:
-	dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
-}
-
-static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
-{
-	if (slot->cd_irq >= 0)
-		free_irq(slot->cd_irq, slot);
-}
-
-#else
-
-static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
-{
-}
-
-static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
-{
-}
-
-#endif
-
 static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
 {
 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
@@ -2128,7 +2061,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 	slot->chip = chip;
 	slot->host = host;
 	slot->rst_n_gpio = -EINVAL;
-	slot->cd_gpio = -EINVAL;
 	slot->cd_idx = -1;
 
 	host->hw_name = "PCI";
@@ -2199,15 +2131,11 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 	if (ret)
 		goto remove;
 
-	sdhci_pci_add_own_cd(slot);
-
 	/*
 	 * Check if the chip needs a separate GPIO for card detect to wake up
 	 * from runtime suspend.  If it is not there, don't allow runtime PM.
-	 * Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure.
 	 */
-	if (chip->fixes && chip->fixes->own_cd_for_runtime_pm &&
-	    !gpio_is_valid(slot->cd_gpio) && slot->cd_idx < 0)
+	if (chip->fixes && chip->fixes->own_cd_for_runtime_pm && slot->cd_idx < 0)
 		chip->allow_runtime_pm = false;
 
 	return slot;
@@ -2227,8 +2155,6 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 	int dead;
 	u32 scratch;
 
-	sdhci_pci_remove_own_cd(slot);
-
 	dead = 0;
 	scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
 	if (scratch == (u32)-1)
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index 15b36cd47860..8bb3b9c78589 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -158,8 +158,6 @@ struct sdhci_pci_slot {
 	struct sdhci_host	*host;
 
 	int			rst_n_gpio;
-	int			cd_gpio;
-	int			cd_irq;
 
 	int			cd_idx;
 	bool			cd_override_level;
-- 
2.33.0

[PATCH v2 6/6] mmc: sdhci-pci: Remove dead code (rst_n_gpio et al)

[Andy Shevchenko]

There is no user of this member. Remove the dead code for good.

The removal is dependent on previous removal of cd_gpio, cd_irq.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mmc/host/sdhci-pci-core.c | 27 ---------------------------
 drivers/mmc/host/sdhci-pci.h      |  2 --
 2 files changed, 29 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index e2b6f60e9f01..6f9877546830 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -1915,21 +1915,6 @@ int sdhci_pci_enable_dma(struct sdhci_host *host)
 	return 0;
 }
 
-static void sdhci_pci_gpio_hw_reset(struct sdhci_host *host)
-{
-	struct sdhci_pci_slot *slot = sdhci_priv(host);
-	int rst_n_gpio = slot->rst_n_gpio;
-
-	if (!gpio_is_valid(rst_n_gpio))
-		return;
-	gpio_set_value_cansleep(rst_n_gpio, 0);
-	/* For eMMC, minimum is 1us but give it 10us for good measure */
-	udelay(10);
-	gpio_set_value_cansleep(rst_n_gpio, 1);
-	/* For eMMC, minimum is 200us but give it 300us for good measure */
-	usleep_range(300, 1000);
-}
-
 static void sdhci_pci_hw_reset(struct sdhci_host *host)
 {
 	struct sdhci_pci_slot *slot = sdhci_priv(host);
@@ -2060,7 +2045,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 
 	slot->chip = chip;
 	slot->host = host;
-	slot->rst_n_gpio = -EINVAL;
 	slot->cd_idx = -1;
 
 	host->hw_name = "PCI";
@@ -2086,17 +2070,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 			goto cleanup;
 	}
 
-	if (gpio_is_valid(slot->rst_n_gpio)) {
-		if (!devm_gpio_request(&pdev->dev, slot->rst_n_gpio, "eMMC_reset")) {
-			gpio_direction_output(slot->rst_n_gpio, 1);
-			slot->host->mmc->caps |= MMC_CAP_HW_RESET;
-			slot->hw_reset = sdhci_pci_gpio_hw_reset;
-		} else {
-			dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
-			slot->rst_n_gpio = -EINVAL;
-		}
-	}
-
 	host->mmc->pm_caps = MMC_PM_KEEP_POWER;
 	host->mmc->slotno = slotno;
 	host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index 8bb3b9c78589..5e3193278ff9 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -157,8 +157,6 @@ struct sdhci_pci_slot {
 	struct sdhci_pci_chip	*chip;
 	struct sdhci_host	*host;
 
-	int			rst_n_gpio;
-
 	int			cd_idx;
 	bool			cd_override_level;
 
-- 
2.33.0

Re: [PATCH v2 1/6] mmc: sdhci-pci: Read card detect from ACPI for Intel Merrifield

[Adrian Hunter]

On 13/10/2021 23:17, Andy Shevchenko wrote:
> Intel Merrifield platform had been converted to use ACPI enumeration.
> However, the driver missed an update to retrieve card detect GPIO.
> Fix it here.
> 
> Unfortunately we can't rely on CD GPIO state because there are two
> different PCB designs in the wild that are using the opposite card
> detection sense and there is no way to distinguish those platforms,
> that's why ignore CD GPIO completely and use it only as an event.
> 
> Fixes: 4590d98f5a4f ("sfi: Remove framework for deprecated firmware")
> BugLink: https://github.com/edison-fw/meta-intel-edison/issues/135
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/sdhci-pci-core.c | 29 ++++++++++++++++++++++++-----
>  1 file changed, 24 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index be19785227fe..d0f2edfe296c 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -616,16 +616,12 @@ static int intel_select_drive_strength(struct mmc_card *card,
>  	return intel_host->drv_strength;
>  }
>  
> -static int bxt_get_cd(struct mmc_host *mmc)
> +static int sdhci_get_cd_nogpio(struct mmc_host *mmc)
>  {
> -	int gpio_cd = mmc_gpio_get_cd(mmc);
>  	struct sdhci_host *host = mmc_priv(mmc);
>  	unsigned long flags;
>  	int ret = 0;
>  
> -	if (!gpio_cd)
> -		return 0;
> -
>  	spin_lock_irqsave(&host->lock, flags);
>  
>  	if (host->flags & SDHCI_DEVICE_DEAD)
> @@ -638,6 +634,21 @@ static int bxt_get_cd(struct mmc_host *mmc)
>  	return ret;
>  }
>  
> +static int bxt_get_cd(struct mmc_host *mmc)
> +{
> +	int gpio_cd = mmc_gpio_get_cd(mmc);
> +
> +	if (!gpio_cd)
> +		return 0;
> +
> +	return sdhci_get_cd_nogpio(mmc);
> +}
> +
> +static int mrfld_get_cd(struct mmc_host *mmc)
> +{
> +	return sdhci_get_cd_nogpio(mmc);
> +}
> +
>  #define SDHCI_INTEL_PWR_TIMEOUT_CNT	20
>  #define SDHCI_INTEL_PWR_TIMEOUT_UDELAY	100
>  
> @@ -1341,6 +1352,14 @@ static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
>  					 MMC_CAP_1_8V_DDR;
>  		break;
>  	case INTEL_MRFLD_SD:
> +		slot->cd_idx = 0;
> +		slot->cd_override_level = true;
> +		/*
> +		 * There are two PCB designs of SD card slot with the opposite
> +		 * card detection sense. Quirk this out by ignoring GPIO state
> +		 * completely in the custom ->get_cd() callback.
> +		 */
> +		slot->host->mmc_host_ops.get_cd = mrfld_get_cd;
>  		slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
>  		break;
>  	case INTEL_MRFLD_SDIO:
> 

Re: [PATCH v2 2/6] mmc: sdhci: Deduplicate sdhci_get_cd_nogpio()

[Adrian Hunter]

On 13/10/2021 23:17, Andy Shevchenko wrote:
> The analogue of the sdhci_get_cd_nogpio() is used in the sdhci-pci-core
> and sdhci-acpi modules. Deduplicate it by moving to sdhci and exporting.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/sdhci-acpi.c     | 14 +-------------
>  drivers/mmc/host/sdhci-pci-core.c | 18 ------------------
>  drivers/mmc/host/sdhci.c          | 19 +++++++++++++++++++
>  drivers/mmc/host/sdhci.h          |  1 +
>  4 files changed, 21 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
> index 8fe65f172a61..f1ef0d28b0dd 100644
> --- a/drivers/mmc/host/sdhci-acpi.c
> +++ b/drivers/mmc/host/sdhci-acpi.c
> @@ -362,23 +362,11 @@ static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
>  static int bxt_get_cd(struct mmc_host *mmc)
>  {
>  	int gpio_cd = mmc_gpio_get_cd(mmc);
> -	struct sdhci_host *host = mmc_priv(mmc);
> -	unsigned long flags;
> -	int ret = 0;
>  
>  	if (!gpio_cd)
>  		return 0;
>  
> -	spin_lock_irqsave(&host->lock, flags);
> -
> -	if (host->flags & SDHCI_DEVICE_DEAD)
> -		goto out;
> -
> -	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
> -out:
> -	spin_unlock_irqrestore(&host->lock, flags);
> -
> -	return ret;
> +	return sdhci_get_cd_nogpio(mmc);
>  }
>  
>  static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index d0f2edfe296c..19e13dfae593 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -616,24 +616,6 @@ static int intel_select_drive_strength(struct mmc_card *card,
>  	return intel_host->drv_strength;
>  }
>  
> -static int sdhci_get_cd_nogpio(struct mmc_host *mmc)
> -{
> -	struct sdhci_host *host = mmc_priv(mmc);
> -	unsigned long flags;
> -	int ret = 0;
> -
> -	spin_lock_irqsave(&host->lock, flags);
> -
> -	if (host->flags & SDHCI_DEVICE_DEAD)
> -		goto out;
> -
> -	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
> -out:
> -	spin_unlock_irqrestore(&host->lock, flags);
> -
> -	return ret;
> -}
> -
>  static int bxt_get_cd(struct mmc_host *mmc)
>  {
>  	int gpio_cd = mmc_gpio_get_cd(mmc);
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 357b365bf0ec..1f4b052f6f27 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -2419,6 +2419,25 @@ static int sdhci_get_cd(struct mmc_host *mmc)
>  	return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
>  }
>  
> +int sdhci_get_cd_nogpio(struct mmc_host *mmc)
> +{
> +	struct sdhci_host *host = mmc_priv(mmc);
> +	unsigned long flags;
> +	int ret = 0;
> +
> +	spin_lock_irqsave(&host->lock, flags);
> +
> +	if (host->flags & SDHCI_DEVICE_DEAD)
> +		goto out;
> +
> +	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
> +out:
> +	spin_unlock_irqrestore(&host->lock, flags);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(sdhci_get_cd_nogpio);
> +
>  static int sdhci_check_ro(struct sdhci_host *host)
>  {
>  	unsigned long flags;
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index e8d04e42a5af..c593af479832 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -775,6 +775,7 @@ void sdhci_set_power_and_bus_voltage(struct sdhci_host *host,
>  				     unsigned short vdd);
>  void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
>  			   unsigned short vdd);
> +int sdhci_get_cd_nogpio(struct mmc_host *mmc);
>  void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
>  int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
>  void sdhci_set_bus_width(struct sdhci_host *host, int width);
> 

Re: [PATCH v2 3/6] mmc: sdhci: Remove unused prototype declaration in the header

[Adrian Hunter]

On 13/10/2021 23:17, Andy Shevchenko wrote:
> sdhci_card_detect() is not defined anywhere. Remove it.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/sdhci.h | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index c593af479832..bb883553d3b4 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -750,7 +750,6 @@ static inline void *sdhci_priv(struct sdhci_host *host)
>  	return host->private;
>  }
>  
> -void sdhci_card_detect(struct sdhci_host *host);
>  void __sdhci_read_caps(struct sdhci_host *host, const u16 *ver,
>  		       const u32 *caps, const u32 *caps1);
>  int sdhci_setup_host(struct sdhci_host *host);
> 

Re: [PATCH v2 4/6] mmc: sdhci-pci: Remove dead code (struct sdhci_pci_data et al)

[Adrian Hunter]

On 13/10/2021 23:17, Andy Shevchenko wrote:
> The last user of this struct gone couple of releases ago. Besides that
> there were not so many users of this API for 10+ years: one is implied
> above Intel Merrifield (added 20160831 by 3976b0380b31, removed 20210211
> by 4590d98f5a4f), and another is Intel Sunrisepoint (added 20150206 by
> e1bfad6d936d, removed 20170320 by 51ced59cc02e).

Please use the standard way of showing commits
i.e. commit xxxxxxxxxxxx ("blah blah")

> 
> Effectively this is a revert of the commit 52c506f0bc72 ("mmc: sdhci-pci:
> add platform data").
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

With above change:

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/Makefile          |  1 -
>  drivers/mmc/host/sdhci-pci-core.c  | 31 ++++--------------------------
>  drivers/mmc/host/sdhci-pci-data.c  |  6 ------
>  drivers/mmc/host/sdhci-pci.h       |  1 -
>  include/linux/mmc/sdhci-pci-data.h | 18 -----------------
>  5 files changed, 4 insertions(+), 53 deletions(-)
>  delete mode 100644 drivers/mmc/host/sdhci-pci-data.c
>  delete mode 100644 include/linux/mmc/sdhci-pci-data.h
> 
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index 14004cc09aaa..ea36d379bd3c 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -14,7 +14,6 @@ obj-$(CONFIG_MMC_SDHCI)		+= sdhci.o
>  obj-$(CONFIG_MMC_SDHCI_PCI)	+= sdhci-pci.o
>  sdhci-pci-y			+= sdhci-pci-core.o sdhci-pci-o2micro.o sdhci-pci-arasan.o \
>  				   sdhci-pci-dwc-mshc.o sdhci-pci-gli.o
> -obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI))	+= sdhci-pci-data.o
>  obj-$(CONFIG_MMC_SDHCI_ACPI)	+= sdhci-acpi.o
>  obj-$(CONFIG_MMC_SDHCI_PXAV3)	+= sdhci-pxav3.o
>  obj-$(CONFIG_MMC_SDHCI_PXAV2)	+= sdhci-pxav2.o
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index 19e13dfae593..8938c63b1e77 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -17,8 +17,6 @@
>  #include <linux/dma-mapping.h>
>  #include <linux/slab.h>
>  #include <linux/device.h>
> -#include <linux/mmc/host.h>
> -#include <linux/mmc/mmc.h>
>  #include <linux/scatterlist.h>
>  #include <linux/io.h>
>  #include <linux/iopoll.h>
> @@ -26,11 +24,13 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/pm_qos.h>
>  #include <linux/debugfs.h>
> -#include <linux/mmc/slot-gpio.h>
> -#include <linux/mmc/sdhci-pci-data.h>
>  #include <linux/acpi.h>
>  #include <linux/dmi.h>
>  
> +#include <linux/mmc/host.h>
> +#include <linux/mmc/mmc.h>
> +#include <linux/mmc/slot-gpio.h>
> +
>  #ifdef CONFIG_X86
>  #include <asm/iosf_mbi.h>
>  #endif
> @@ -2131,22 +2131,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
>  	slot->cd_gpio = -EINVAL;
>  	slot->cd_idx = -1;
>  
> -	/* Retrieve platform data if there is any */
> -	if (*sdhci_pci_get_data)
> -		slot->data = sdhci_pci_get_data(pdev, slotno);
> -
> -	if (slot->data) {
> -		if (slot->data->setup) {
> -			ret = slot->data->setup(slot->data);
> -			if (ret) {
> -				dev_err(&pdev->dev, "platform setup failed\n");
> -				goto free;
> -			}
> -		}
> -		slot->rst_n_gpio = slot->data->rst_n_gpio;
> -		slot->cd_gpio = slot->data->cd_gpio;
> -	}
> -
>  	host->hw_name = "PCI";
>  	host->ops = chip->fixes && chip->fixes->ops ?
>  		    chip->fixes->ops :
> @@ -2233,10 +2217,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
>  		chip->fixes->remove_slot(slot, 0);
>  
>  cleanup:
> -	if (slot->data && slot->data->cleanup)
> -		slot->data->cleanup(slot->data);
> -
> -free:
>  	sdhci_free_host(host);
>  
>  	return ERR_PTR(ret);
> @@ -2259,9 +2239,6 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
>  	if (slot->chip->fixes && slot->chip->fixes->remove_slot)
>  		slot->chip->fixes->remove_slot(slot, dead);
>  
> -	if (slot->data && slot->data->cleanup)
> -		slot->data->cleanup(slot->data);
> -
>  	sdhci_free_host(slot->host);
>  }
>  
> diff --git a/drivers/mmc/host/sdhci-pci-data.c b/drivers/mmc/host/sdhci-pci-data.c
> deleted file mode 100644
> index 18638fb363d8..000000000000
> --- a/drivers/mmc/host/sdhci-pci-data.c
> +++ /dev/null
> @@ -1,6 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -#include <linux/module.h>
> -#include <linux/mmc/sdhci-pci-data.h>
> -
> -struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev, int slotno);
> -EXPORT_SYMBOL_GPL(sdhci_pci_get_data);
> diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
> index 8f90c4163bb5..15b36cd47860 100644
> --- a/drivers/mmc/host/sdhci-pci.h
> +++ b/drivers/mmc/host/sdhci-pci.h
> @@ -156,7 +156,6 @@ struct sdhci_pci_fixes {
>  struct sdhci_pci_slot {
>  	struct sdhci_pci_chip	*chip;
>  	struct sdhci_host	*host;
> -	struct sdhci_pci_data	*data;
>  
>  	int			rst_n_gpio;
>  	int			cd_gpio;
> diff --git a/include/linux/mmc/sdhci-pci-data.h b/include/linux/mmc/sdhci-pci-data.h
> deleted file mode 100644
> index 1d42872d22f3..000000000000
> --- a/include/linux/mmc/sdhci-pci-data.h
> +++ /dev/null
> @@ -1,18 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -#ifndef LINUX_MMC_SDHCI_PCI_DATA_H
> -#define LINUX_MMC_SDHCI_PCI_DATA_H
> -
> -struct pci_dev;
> -
> -struct sdhci_pci_data {
> -	struct pci_dev	*pdev;
> -	int		slotno;
> -	int		rst_n_gpio; /* Set to -EINVAL if unused */
> -	int		cd_gpio;    /* Set to -EINVAL if unused */
> -	int		(*setup)(struct sdhci_pci_data *data);
> -	void		(*cleanup)(struct sdhci_pci_data *data);
> -};
> -
> -extern struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev,
> -				int slotno);
> -#endif
> 

Re: [PATCH v2 5/6] mmc: sdhci-pci: Remove dead code (cd_gpio, cd_irq et al)

[Adrian Hunter]

On 13/10/2021 23:17, Andy Shevchenko wrote:
> The last user of this struct gone couple of releases ago.
> Remove the dead code for good and encourage people to use
> MMC core functionality for that.
> 
> The removal is dependent on the previous removal of the
> struct sdhci_pci_data.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/sdhci-pci-core.c | 76 +------------------------------
>  drivers/mmc/host/sdhci-pci.h      |  2 -
>  2 files changed, 1 insertion(+), 77 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index 8938c63b1e77..e2b6f60e9f01 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -345,73 +345,6 @@ static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
>  	return 0;
>  }
>  
> -#ifdef CONFIG_PM
> -
> -static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
> -{
> -	struct sdhci_pci_slot *slot = dev_id;
> -	struct sdhci_host *host = slot->host;
> -
> -	mmc_detect_change(host->mmc, msecs_to_jiffies(200));
> -	return IRQ_HANDLED;
> -}
> -
> -static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
> -{
> -	int err, irq, gpio = slot->cd_gpio;
> -
> -	slot->cd_gpio = -EINVAL;
> -	slot->cd_irq = -EINVAL;
> -
> -	if (!gpio_is_valid(gpio))
> -		return;
> -
> -	err = devm_gpio_request(&slot->chip->pdev->dev, gpio, "sd_cd");
> -	if (err < 0)
> -		goto out;
> -
> -	err = gpio_direction_input(gpio);
> -	if (err < 0)
> -		goto out_free;
> -
> -	irq = gpio_to_irq(gpio);
> -	if (irq < 0)
> -		goto out_free;
> -
> -	err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
> -			  IRQF_TRIGGER_FALLING, "sd_cd", slot);
> -	if (err)
> -		goto out_free;
> -
> -	slot->cd_gpio = gpio;
> -	slot->cd_irq = irq;
> -
> -	return;
> -
> -out_free:
> -	devm_gpio_free(&slot->chip->pdev->dev, gpio);
> -out:
> -	dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
> -}
> -
> -static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
> -{
> -	if (slot->cd_irq >= 0)
> -		free_irq(slot->cd_irq, slot);
> -}
> -
> -#else
> -
> -static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
> -{
> -}
> -
> -static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
> -{
> -}
> -
> -#endif
> -
>  static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
>  {
>  	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
> @@ -2128,7 +2061,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
>  	slot->chip = chip;
>  	slot->host = host;
>  	slot->rst_n_gpio = -EINVAL;
> -	slot->cd_gpio = -EINVAL;
>  	slot->cd_idx = -1;
>  
>  	host->hw_name = "PCI";
> @@ -2199,15 +2131,11 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
>  	if (ret)
>  		goto remove;
>  
> -	sdhci_pci_add_own_cd(slot);
> -
>  	/*
>  	 * Check if the chip needs a separate GPIO for card detect to wake up
>  	 * from runtime suspend.  If it is not there, don't allow runtime PM.
> -	 * Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure.
>  	 */
> -	if (chip->fixes && chip->fixes->own_cd_for_runtime_pm &&
> -	    !gpio_is_valid(slot->cd_gpio) && slot->cd_idx < 0)
> +	if (chip->fixes && chip->fixes->own_cd_for_runtime_pm && slot->cd_idx < 0)
>  		chip->allow_runtime_pm = false;
>  
>  	return slot;
> @@ -2227,8 +2155,6 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
>  	int dead;
>  	u32 scratch;
>  
> -	sdhci_pci_remove_own_cd(slot);
> -
>  	dead = 0;
>  	scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
>  	if (scratch == (u32)-1)
> diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
> index 15b36cd47860..8bb3b9c78589 100644
> --- a/drivers/mmc/host/sdhci-pci.h
> +++ b/drivers/mmc/host/sdhci-pci.h
> @@ -158,8 +158,6 @@ struct sdhci_pci_slot {
>  	struct sdhci_host	*host;
>  
>  	int			rst_n_gpio;
> -	int			cd_gpio;
> -	int			cd_irq;
>  
>  	int			cd_idx;
>  	bool			cd_override_level;
> 

Re: [PATCH v2 6/6] mmc: sdhci-pci: Remove dead code (rst_n_gpio et al)

[Adrian Hunter]

On 13/10/2021 23:17, Andy Shevchenko wrote:
> There is no user of this member. Remove the dead code for good.
> 
> The removal is dependent on previous removal of cd_gpio, cd_irq.

I got that wrong, I think it is actually dependent on the sdhci_pci_data
removal?

> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

With above resolved:

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/sdhci-pci-core.c | 27 ---------------------------
>  drivers/mmc/host/sdhci-pci.h      |  2 --
>  2 files changed, 29 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index e2b6f60e9f01..6f9877546830 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -1915,21 +1915,6 @@ int sdhci_pci_enable_dma(struct sdhci_host *host)
>  	return 0;
>  }
>  
> -static void sdhci_pci_gpio_hw_reset(struct sdhci_host *host)
> -{
> -	struct sdhci_pci_slot *slot = sdhci_priv(host);
> -	int rst_n_gpio = slot->rst_n_gpio;
> -
> -	if (!gpio_is_valid(rst_n_gpio))
> -		return;
> -	gpio_set_value_cansleep(rst_n_gpio, 0);
> -	/* For eMMC, minimum is 1us but give it 10us for good measure */
> -	udelay(10);
> -	gpio_set_value_cansleep(rst_n_gpio, 1);
> -	/* For eMMC, minimum is 200us but give it 300us for good measure */
> -	usleep_range(300, 1000);
> -}
> -
>  static void sdhci_pci_hw_reset(struct sdhci_host *host)
>  {
>  	struct sdhci_pci_slot *slot = sdhci_priv(host);
> @@ -2060,7 +2045,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
>  
>  	slot->chip = chip;
>  	slot->host = host;
> -	slot->rst_n_gpio = -EINVAL;
>  	slot->cd_idx = -1;
>  
>  	host->hw_name = "PCI";
> @@ -2086,17 +2070,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
>  			goto cleanup;
>  	}
>  
> -	if (gpio_is_valid(slot->rst_n_gpio)) {
> -		if (!devm_gpio_request(&pdev->dev, slot->rst_n_gpio, "eMMC_reset")) {
> -			gpio_direction_output(slot->rst_n_gpio, 1);
> -			slot->host->mmc->caps |= MMC_CAP_HW_RESET;
> -			slot->hw_reset = sdhci_pci_gpio_hw_reset;
> -		} else {
> -			dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
> -			slot->rst_n_gpio = -EINVAL;
> -		}
> -	}
> -
>  	host->mmc->pm_caps = MMC_PM_KEEP_POWER;
>  	host->mmc->slotno = slotno;
>  	host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
> diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
> index 8bb3b9c78589..5e3193278ff9 100644
> --- a/drivers/mmc/host/sdhci-pci.h
> +++ b/drivers/mmc/host/sdhci-pci.h
> @@ -157,8 +157,6 @@ struct sdhci_pci_slot {
>  	struct sdhci_pci_chip	*chip;
>  	struct sdhci_host	*host;
>  
> -	int			rst_n_gpio;
> -
>  	int			cd_idx;
>  	bool			cd_override_level;
>  
> 

Re: [PATCH v2 1/6] mmc: sdhci-pci: Read card detect from ACPI for Intel Merrifield

[Ulf Hansson]

On Wed, 13 Oct 2021 at 22:17, Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> Intel Merrifield platform had been converted to use ACPI enumeration.
> However, the driver missed an update to retrieve card detect GPIO.
> Fix it here.
>
> Unfortunately we can't rely on CD GPIO state because there are two
> different PCB designs in the wild that are using the opposite card
> detection sense and there is no way to distinguish those platforms,
> that's why ignore CD GPIO completely and use it only as an event.
>
> Fixes: 4590d98f5a4f ("sfi: Remove framework for deprecated firmware")
> BugLink: https://github.com/edison-fw/meta-intel-edison/issues/135
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Applied for fixes and by adding a stable tag, thanks!

Note that, I am expecting yet another version of the remaining patches
in the series, allowing you to address the final comments from Adrian.

Kind regards
Uffe

> ---
>  drivers/mmc/host/sdhci-pci-core.c | 29 ++++++++++++++++++++++++-----
>  1 file changed, 24 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index be19785227fe..d0f2edfe296c 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -616,16 +616,12 @@ static int intel_select_drive_strength(struct mmc_card *card,
>         return intel_host->drv_strength;
>  }
>
> -static int bxt_get_cd(struct mmc_host *mmc)
> +static int sdhci_get_cd_nogpio(struct mmc_host *mmc)
>  {
> -       int gpio_cd = mmc_gpio_get_cd(mmc);
>         struct sdhci_host *host = mmc_priv(mmc);
>         unsigned long flags;
>         int ret = 0;
>
> -       if (!gpio_cd)
> -               return 0;
> -
>         spin_lock_irqsave(&host->lock, flags);
>
>         if (host->flags & SDHCI_DEVICE_DEAD)
> @@ -638,6 +634,21 @@ static int bxt_get_cd(struct mmc_host *mmc)
>         return ret;
>  }
>
> +static int bxt_get_cd(struct mmc_host *mmc)
> +{
> +       int gpio_cd = mmc_gpio_get_cd(mmc);
> +
> +       if (!gpio_cd)
> +               return 0;
> +
> +       return sdhci_get_cd_nogpio(mmc);
> +}
> +
> +static int mrfld_get_cd(struct mmc_host *mmc)
> +{
> +       return sdhci_get_cd_nogpio(mmc);
> +}
> +
>  #define SDHCI_INTEL_PWR_TIMEOUT_CNT    20
>  #define SDHCI_INTEL_PWR_TIMEOUT_UDELAY 100
>
> @@ -1341,6 +1352,14 @@ static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
>                                          MMC_CAP_1_8V_DDR;
>                 break;
>         case INTEL_MRFLD_SD:
> +               slot->cd_idx = 0;
> +               slot->cd_override_level = true;
> +               /*
> +                * There are two PCB designs of SD card slot with the opposite
> +                * card detection sense. Quirk this out by ignoring GPIO state
> +                * completely in the custom ->get_cd() callback.
> +                */
> +               slot->host->mmc_host_ops.get_cd = mrfld_get_cd;
>                 slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
>                 break;
>         case INTEL_MRFLD_SDIO:
> --
> 2.33.0
>