linux-kernel - [PATCH V8 22/23] mmc: sdhci-pci: add UHS-II support framework

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Message-Id: <20230621100151.6329-23-victorshihgli@gmail.com>
Date:   Wed, 21 Jun 2023 18:01:50 +0800
From:   Victor Shih <victorshihgli@...il.com>
To:     ulf.hansson@...aro.org, adrian.hunter@...el.com
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        benchuanggli@...il.com, HL.Liu@...esyslogic.com.tw,
        Greg.tu@...esyslogic.com.tw, takahiro.akashi@...aro.org,
        dlunev@...omium.org, Victor Shih <victorshihgli@...il.com>,
        Ben Chuang <ben.chuang@...esyslogic.com.tw>,
        Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: [PATCH V8 22/23] mmc: sdhci-pci: add UHS-II support framework

From: Victor Shih <victor.shih@...esyslogic.com.tw>

This patch prepares for adding UHS-II support at a specific UHS-II
capable sdhci-pci controller, GL9755 for now.

Updates in V8:
 - Add config select MMC_SDHCI_UHS2 in Kconfig.

Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
---
 drivers/mmc/host/Kconfig          |  1 +
 drivers/mmc/host/sdhci-pci-core.c | 16 +++++++++++++++-
 drivers/mmc/host/sdhci-pci.h      |  3 +++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 215f1ab011dd..aa178384de16 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -111,6 +111,7 @@ config MMC_SDHCI_PCI
 	tristate "SDHCI support on PCI bus"
 	depends on MMC_SDHCI && PCI
 	select MMC_CQHCI
+	select MMC_SDHCI_UHS2
 	select IOSF_MBI if X86
 	select MMC_SDHCI_IO_ACCESSORS
 	help
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 1c2572c0f012..e84c2db41a70 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -40,6 +40,7 @@
 #include "sdhci.h"
 #include "sdhci-cqhci.h"
 #include "sdhci-pci.h"
+#include "sdhci-uhs2.h"
 
 static void sdhci_pci_hw_reset(struct sdhci_host *host);
 
@@ -2156,7 +2157,10 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 	if (scratch == (u32)-1)
 		dead = 1;
 
-	sdhci_remove_host(slot->host, dead);
+	if (slot->chip->fixes && slot->chip->fixes->remove_host)
+		slot->chip->fixes->remove_host(slot, dead);
+	else
+		sdhci_remove_host(slot->host, dead);
 
 	if (slot->chip->fixes && slot->chip->fixes->remove_slot)
 		slot->chip->fixes->remove_slot(slot, dead);
@@ -2164,6 +2168,16 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 	sdhci_free_host(slot->host);
 }
 
+int sdhci_pci_uhs2_add_host(struct sdhci_pci_slot *slot)
+{
+	return sdhci_uhs2_add_host(slot->host);
+}
+
+void sdhci_pci_uhs2_remove_host(struct sdhci_pci_slot *slot, int dead)
+{
+	sdhci_uhs2_remove_host(slot->host, dead);
+}
+
 static void sdhci_pci_runtime_pm_allow(struct device *dev)
 {
 	pm_suspend_ignore_children(dev, 1);
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index 9c8863956381..d5c9f02f3e14 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -141,6 +141,7 @@ struct sdhci_pci_fixes {
 	int			(*probe_slot) (struct sdhci_pci_slot *);
 	int			(*add_host) (struct sdhci_pci_slot *);
 	void			(*remove_slot) (struct sdhci_pci_slot *, int);
+	void			(*remove_host) (struct sdhci_pci_slot *, int);
 
 #ifdef CONFIG_PM_SLEEP
 	int			(*suspend) (struct sdhci_pci_chip *);
@@ -185,6 +186,8 @@ static inline void *sdhci_pci_priv(struct sdhci_pci_slot *slot)
 	return (void *)slot->private;
 }
 
+int sdhci_pci_uhs2_add_host(struct sdhci_pci_slot *slot);
+void sdhci_pci_uhs2_remove_host(struct sdhci_pci_slot *slot, int dead);
 #ifdef CONFIG_PM_SLEEP
 int sdhci_pci_resume_host(struct sdhci_pci_chip *chip);
 #endif
-- 
2.25.1