mmc: sdhci-msm: dump vendor specific registers during error

Implement dump_vendor_registers host operation to print the
vendor specific registers in addition to standard SDHC
register during error conditions.
Signed-off-by: NSahitya Tummala <stummala@codeaurora.org>
Signed-off-by: NSarthak Garg <sartgarg@codeaurora.org>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1590139950-7288-9-git-send-email-sartgarg@codeaurora.orgSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-msm.c

@@ -1874,6 +1874,36 @@ static void sdhci_msm_reset(struct sdhci_host *host, u8 mask)
 	sdhci_reset(host, mask);
 }
 
+#define DRIVER_NAME "sdhci_msm"
+#define SDHCI_MSM_DUMP(f, x...) \
+	pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
+
+void sdhci_msm_dump_vendor_regs(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+	const struct sdhci_msm_offset *msm_offset = msm_host->offset;
+
+	SDHCI_MSM_DUMP("----------- VENDOR REGISTER DUMP -----------\n");
+
+	SDHCI_MSM_DUMP(
+			"DLL sts: 0x%08x | DLL cfg:  0x%08x | DLL cfg2: 0x%08x\n",
+		readl_relaxed(host->ioaddr + msm_offset->core_dll_status),
+		readl_relaxed(host->ioaddr + msm_offset->core_dll_config),
+		readl_relaxed(host->ioaddr + msm_offset->core_dll_config_2));
+	SDHCI_MSM_DUMP(
+			"DLL cfg3: 0x%08x | DLL usr ctl:  0x%08x | DDR cfg: 0x%08x\n",
+		readl_relaxed(host->ioaddr + msm_offset->core_dll_config_3),
+		readl_relaxed(host->ioaddr + msm_offset->core_dll_usr_ctl),
+		readl_relaxed(host->ioaddr + msm_offset->core_ddr_config));
+	SDHCI_MSM_DUMP(
+			"Vndr func: 0x%08x | Vndr func2 : 0x%08x Vndr func3: 0x%08x\n",
+		readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec),
+		readl_relaxed(host->ioaddr +
+			msm_offset->core_vendor_spec_func2),
+		readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec3));
+}
+
 static const struct sdhci_msm_variant_ops mci_var_ops = {
 	.msm_readl_relaxed = sdhci_msm_mci_variant_readl_relaxed,
 	.msm_writel_relaxed = sdhci_msm_mci_variant_writel_relaxed,
@@ -1929,6 +1959,7 @@ static const struct sdhci_ops sdhci_msm_ops = {
 	.write_w = sdhci_msm_writew,
 	.write_b = sdhci_msm_writeb,
 	.irq	= sdhci_msm_cqe_irq,
+	.dump_vendor_regs = sdhci_msm_dump_vendor_regs,
 };
 
 static const struct sdhci_pltfm_data sdhci_msm_pdata = {