linux-kernel - [RFC PATCH V3 10/21] mmc: sdhci: UHS-II support, dump UHS-II registers

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Date:   Fri, 10 Jul 2020 19:10:34 +0800
From:   Ben Chuang <benchuanggli@...il.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        ben.chuang@...esyslogic.com.tw, takahiro.akashi@...aro.org,
        greg.tu@...esyslogic.com.tw, Ben Chuang <benchuanggli@...il.com>
Subject: [RFC PATCH V3 10/21] mmc: sdhci: UHS-II support, 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.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 37b1158c1c0c..c2f6923d296c 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -111,6 +111,30 @@ void sdhci_dumpregs(struct sdhci_host *host)
 		}
 	}
 
+	if (IS_ENABLED(CONFIG_MMC_SDHCI_UHS2) &&
+	    host->mmc && host->mmc->flags & MMC_UHS2_SUPPORT) {
+		SDHCI_DUMP("==================== UHS2 ==================\n");
+		SDHCI_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_DUMP("Cmd:       0x%08x | Trn mode: 0x%08x\n",
+			   sdhci_readw(host, SDHCI_UHS2_COMMAND),
+			   sdhci_readw(host, SDHCI_UHS2_TRANS_MODE));
+		SDHCI_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_DUMP("Dev Int Code:  0x%08x\n",
+			   sdhci_readb(host, SDHCI_UHS2_DEV_INT_CODE));
+		SDHCI_DUMP("Reset:     0x%08x | Timer:    0x%08x\n",
+			   sdhci_readw(host, SDHCI_UHS2_SW_RESET),
+			   sdhci_readw(host, SDHCI_UHS2_TIMER_CTRL));
+		SDHCI_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_DUMP("ErrSigEn:  0x%08x\n",
+			   sdhci_readl(host, SDHCI_UHS2_ERR_INT_SIG_EN));
+	}
+
 	if (host->ops->dump_vendor_regs)
 		host->ops->dump_vendor_regs(host);
 
-- 
2.27.0