This has proven very useful in debugging SDHCI RPM interaction
issues.
Signed-off-by: Jeremy McNicoll <jeremymc@xxxxxxxxxx>
---
drivers/mmc/host/sdhci-msm.c | 79 ++++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/host/sdhci.c | 25 ++++++++++++++
drivers/mmc/host/sdhci.h | 1 +
3 files changed, 105 insertions(+)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index ee01d95..1fcda96 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -678,6 +678,84 @@ static int sdhci_msm_hs400_dll_calibration(struct sdhci_host *host)
return ret;
}
+
+
+#define MAX_TEST_BUS 20
+#define CORE_MCI_DATA_CNT 0x30
+#define CORE_MCI_FIFO_CNT 0x44
+#define CORE_MCI_STATUS 0x34
+#define CORE_VENDOR_SPEC_ADMA_ERR_ADDR0 0x114
+#define CORE_VENDOR_SPEC_ADMA_ERR_ADDR1 0x118
+#define CORE_TESTBUS_SEL2_BIT 4
+#define CORE_TESTBUS_SEL2 (1 << CORE_TESTBUS_SEL2_BIT)
+
+#define CORE_TESTBUS_ENA (1 << 3)
+
+#define CORE_TESTBUS_CONFIG 0x0CC
+
+#define CORE_SDCC_DEBUG_REG 0x124
+
+void sdhci_msm_dump_vendor_regs(struct sdhci_host *host)
+{
+
+ int tbsel, tbsel2;
+ int i, index = 0;
+ u32 test_bus_val = 0;
+ u32 debug_reg[MAX_TEST_BUS] = {0};
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_msm_host *msm_host;
+
+ pltfm_host = sdhci_priv(host);
+ msm_host = sdhci_pltfm_priv(pltfm_host);
+
+ pr_info("----------- VENDOR REGISTER DUMP -----------\n");
+ pr_info("Data cnt: 0x%08x | Fifo cnt: 0x%08x | Int sts: 0x%08x\n",
+ readl_relaxed(msm_host->core_mem + CORE_MCI_DATA_CNT),
+ readl_relaxed(msm_host->core_mem + CORE_MCI_FIFO_CNT),
+ readl_relaxed(msm_host->core_mem + CORE_MCI_STATUS));
+ pr_info("DLL cfg: 0x%08x | DLL sts: 0x%08x | SDCC ver: 0x%08x\n",
+ readl_relaxed(host->ioaddr + CORE_DLL_CONFIG),
+ readl_relaxed(host->ioaddr + CORE_DLL_STATUS),
+ readl_relaxed(msm_host->core_mem + CORE_MCI_VERSION));
+ pr_info("Vndr func: 0x%08x | Vndr adma err : addr0: 0x%08x addr1: 0x%08x\n",
+ readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC),
+ readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC_ADMA_ERR_ADDR0),
+ readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC_ADMA_ERR_ADDR1));
+
+ /*
+ * tbsel indicates [2:0] bits and tbsel2 indicates [7:4] bits
+ * of CORE_TESTBUS_CONFIG register.
+ *
+ * To select test bus 0 to 7 use tbsel and to select any test bus
+ * above 7 use (tbsel2 | tbsel) to get the test bus number. For eg,
+ * to select test bus 14, write 0x1E to CORE_TESTBUS_CONFIG register
+ * i.e., tbsel2[7:4] = 0001, tbsel[2:0] = 110.
+ */
+ for (tbsel2 = 0; tbsel2 < 3; tbsel2++) {
+ for (tbsel = 0; tbsel < 8; tbsel++) {
+ if (index >= MAX_TEST_BUS)
+ break;
+ test_bus_val = (tbsel2 << CORE_TESTBUS_SEL2_BIT) |
+ tbsel | CORE_TESTBUS_ENA;
+ writel_relaxed(test_bus_val,
+ msm_host->core_mem + CORE_TESTBUS_CONFIG);
+ debug_reg[index++] = readl_relaxed(msm_host->core_mem +
+ CORE_SDCC_DEBUG_REG);
+ }
+ }
+
+ for (i = 0; i < MAX_TEST_BUS; i = i + 4)
+ pr_info(" Test bus[%d to %d]: 0x%08x 0x%08x 0x%08x 0x%08x\n",
+ i, i + 3, debug_reg[i], debug_reg[i+1],
+ debug_reg[i+2], debug_reg[i+3]);
+ /* Disable test bus */
+ writel_relaxed(~CORE_TESTBUS_ENA, msm_host->core_mem +
+ CORE_TESTBUS_CONFIG);
+}
+
+
+
+
static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode)
{
int tuning_seq_cnt = 3;
@@ -1081,6 +1159,7 @@ static const struct sdhci_ops sdhci_msm_ops = {
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = sdhci_msm_set_uhs_signaling,
.voltage_switch = sdhci_msm_voltage_switch,
+ .dump_vendor_regs = sdhci_msm_dump_vendor_regs,
};
static const struct sdhci_pltfm_data sdhci_msm_pdata = {
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 71654b9..5911f98 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -47,6 +47,27 @@ static void sdhci_finish_data(struct sdhci_host *);
static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
+static void sdhci_dump_rpm_info(struct sdhci_host *host)
+{
+ struct mmc_host *mmc = host->mmc;
+
+ pr_info("%s: rpmstatus[pltfm](runtime-suspend:usage_count:disable_depth)(%d:%d:%d)\n",
+ mmc_hostname(mmc), mmc->parent->power.runtime_status,
+ atomic_read(&mmc->parent->power.usage_count),
+ mmc->parent->power.disable_depth);
+}
+
+
+static void sdhci_dump_state(struct sdhci_host *host)
+{
+ struct mmc_host *mmc = host->mmc;
+
+ pr_info("%s: clk: %d claimer: %s pwr: %d\n",
+ mmc_hostname(mmc), host->clock,
+ mmc->claimer->comm, host->pwr);
+ sdhci_dump_rpm_info(host);
+}
+
static void sdhci_dumpregs(struct sdhci_host *host)
{
pr_err(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n",
@@ -100,6 +121,10 @@ static void sdhci_dumpregs(struct sdhci_host *host)
readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
}
+ if (host->ops->dump_vendor_regs)
+ host->ops->dump_vendor_regs(host);
+
+ sdhci_dump_state(host);
pr_err(DRIVER_NAME ": ===========================================\n");
}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 766df17..c055e24 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -563,6 +563,7 @@ struct sdhci_ops {
struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
+ void (*dump_vendor_regs)(struct sdhci_host *host);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
2.6.1
--
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