On apq8016, apq8084 and apq8074 platforms, when we want to do a
software reset, we need to poke some additional vendor specific
registers. If we don't do so, the following error message appears:
mmc0: Reset 0x1 never completed.
sdhci: =========== REGISTER DUMP (mmc0)===========
sdhci: Sys addr: 0x00000000 | Version: 0x00002e02
sdhci: Blk size: 0x00004000 | Blk cnt: 0x00000000
sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
sdhci: Present: 0x01f80000 | Host ctl: 0x00000000
sdhci: Power: 0x00000000 | Blk gap: 0x00000000
sdhci: Wake-up: 0x00000000 | Clock: 0x00000003
sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
sdhci: Int enab: 0x00000000 | Sig enab: 0x00000000
sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
sdhci: Caps: 0x322dc8b2 | Caps_1: 0x00008007
sdhci: Cmd: 0x00000000 | Max curr: 0x00000000
sdhci: Host ctl2: 0x00000000
sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x0000000000000000
sdhci: ===========================================
Fix it by implementing the custom sdhci_reset() function,
which does what is needed.
Signed-off-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
---
drivers/mmc/host/sdhci-msm.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 8ef44a2a2fd9..87a124a37408 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -505,6 +505,23 @@ static irqreturn_t sdhci_msm_pwr_irq(int irq, void *data)
return IRQ_HANDLED;
}
+void sdhci_msm_reset(struct sdhci_host *host, u8 mask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+
+ if (mask & SDHCI_RESET_ALL) {
+ u32 val = readl_relaxed(msm_host->core_mem + CORE_POWER);
+
+ val |= CORE_SW_RST;
+ writel_relaxed(val, msm_host->core_mem + CORE_POWER);
+
+ sdhci_msm_voltage_switch(host);
+ }
+
+ sdhci_reset(host, mask);
+}
+
static const struct of_device_id sdhci_msm_dt_match[] = {
{ .compatible = "qcom,sdhci-msm-v4" },
{},
@@ -514,7 +531,7 @@ MODULE_DEVICE_TABLE(of, sdhci_msm_dt_match);
static const struct sdhci_ops sdhci_msm_ops = {
.platform_execute_tuning = sdhci_msm_execute_tuning,
- .reset = sdhci_reset,
+ .reset = sdhci_msm_reset,
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = sdhci_msm_set_uhs_signaling,
--
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