linux-kernel - [PATCH V5 10/26] mmc: sdhci-uhs2: dump UHS-II registers

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Date:   Fri, 14 Oct 2022 19:45:45 +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 <victor.shih@...esyslogic.com.tw>,
        Ben Chuang <ben.chuang@...esyslogic.com.tw>
Subject: [PATCH V5 10/26] mmc: sdhci-uhs2: dump UHS-II registers

From: AKASHI Takahiro <takahiro.akashi@...aro.org>

Dump UHS-II specific registers, if available, in sdhci_dumpregs()
for informative/debugging use.

Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
---
 drivers/mmc/host/sdhci-uhs2.c | 30 ++++++++++++++++++++++++++++++
 drivers/mmc/host/sdhci-uhs2.h |  4 ++++
 drivers/mmc/host/sdhci.c      |  3 +++
 3 files changed, 37 insertions(+)

diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index f29d3a4ed43c..08905ed081fb 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -18,6 +18,36 @@
 #define DRIVER_NAME "sdhci_uhs2"
 #define DBG(f, x...) \
 	pr_debug(DRIVER_NAME " [%s()]: " f, __func__, ## x)
+#define SDHCI_UHS2_DUMP(f, x...) \
+	pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
+
+void sdhci_uhs2_dump_regs(struct sdhci_host *host)
+{
+	if (!host->mmc || !(host->mmc->flags & MMC_UHS2_SUPPORT))
+		return;
+
+	SDHCI_UHS2_DUMP("==================== UHS2 ==================\n");
+	SDHCI_UHS2_DUMP("Blk Size:  0x%08x | Blk Cnt:  0x%08x\n",
+			sdhci_readw(host, SDHCI_UHS2_BLOCK_SIZE),
+			sdhci_readl(host, SDHCI_UHS2_BLOCK_COUNT));
+	SDHCI_UHS2_DUMP("Cmd:       0x%08x | Trn mode: 0x%08x\n",
+			sdhci_readw(host, SDHCI_UHS2_COMMAND),
+			sdhci_readw(host, SDHCI_UHS2_TRANS_MODE));
+	SDHCI_UHS2_DUMP("Int Stat:  0x%08x | Dev Sel : 0x%08x\n",
+			sdhci_readw(host, SDHCI_UHS2_DEV_INT_STATUS),
+			sdhci_readb(host, SDHCI_UHS2_DEV_SELECT));
+	SDHCI_UHS2_DUMP("Dev Int Code:  0x%08x\n",
+			sdhci_readb(host, SDHCI_UHS2_DEV_INT_CODE));
+	SDHCI_UHS2_DUMP("Reset:     0x%08x | Timer:    0x%08x\n",
+			sdhci_readw(host, SDHCI_UHS2_SW_RESET),
+			sdhci_readw(host, SDHCI_UHS2_TIMER_CTRL));
+	SDHCI_UHS2_DUMP("ErrInt:    0x%08x | ErrIntEn: 0x%08x\n",
+			sdhci_readl(host, SDHCI_UHS2_ERR_INT_STATUS),
+			sdhci_readl(host, SDHCI_UHS2_ERR_INT_STATUS_EN));
+	SDHCI_UHS2_DUMP("ErrSigEn:  0x%08x\n",
+			sdhci_readl(host, SDHCI_UHS2_ERR_INT_SIG_EN));
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs);
 
 /*****************************************************************************\
  *                                                                           *
diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
index 5610affebdf3..afdb05d6056b 100644
--- a/drivers/mmc/host/sdhci-uhs2.h
+++ b/drivers/mmc/host/sdhci-uhs2.h
@@ -207,4 +207,8 @@
 #define SDHCI_UHS2_EMBED_CTRL	0xE6
 #define SDHCI_UHS2_VENDOR	0xE8
 
+struct sdhci_host;
+
+void sdhci_uhs2_dump_regs(struct sdhci_host *host);
+
 #endif /* __SDHCI_UHS2_H */
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 251172890af7..4434838475bf 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -110,6 +110,9 @@ void sdhci_dumpregs(struct sdhci_host *host)
 		}
 	}
 
+	if (host->ops->dump_uhs2_regs)
+		host->ops->dump_uhs2_regs(host);
+
 	if (host->ops->dump_vendor_regs)
 		host->ops->dump_vendor_regs(host);
 
-- 
2.25.1