* [RFC 1/4] mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU
2017-08-30 12:59 [RFC 0/4] mmc: sdhci-msm: Add CQE support for sdhci-msm Ritesh Harjani
@ 2017-08-30 12:59 ` Ritesh Harjani
2017-08-30 12:59 ` [RFC 2/4] mmc: sdhci-msm: Add CQHCI support for sdhci-msm Ritesh Harjani
` (2 subsequent siblings)
3 siblings, 0 replies; 8+ messages in thread
From: Ritesh Harjani @ 2017-08-30 12:59 UTC (permalink / raw)
To: ulf.hansson, adrian.hunter
Cc: linux-mmc, linux-kernel, stummala, asutoshd, Ritesh Harjani
From: Ritesh Harjani <riteshh@codeaurora.org>
Without this patch the CQHCI registers are getting reset
again.
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
---
drivers/mmc/host/cqhci.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c
index 8650a13..2a7351c 100644
--- a/drivers/mmc/host/cqhci.c
+++ b/drivers/mmc/host/cqhci.c
@@ -262,6 +262,9 @@ static void __cqhci_enable(struct cqhci_host *cq_host)
cqhci_writel(cq_host, cqcfg, CQHCI_CFG);
+ cqcfg |= CQHCI_ENABLE;
+ cqhci_writel(cq_host, cqcfg, CQHCI_CFG);
+
cqhci_writel(cq_host, lower_32_bits(cq_host->desc_dma_base),
CQHCI_TDLBA);
cqhci_writel(cq_host, upper_32_bits(cq_host->desc_dma_base),
@@ -271,10 +274,6 @@ static void __cqhci_enable(struct cqhci_host *cq_host)
cqhci_set_irqs(cq_host, 0);
- cqcfg |= CQHCI_ENABLE;
-
- cqhci_writel(cq_host, cqcfg, CQHCI_CFG);
-
mmc->cqe_on = true;
if (cq_host->ops->enable)
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC 2/4] mmc: sdhci-msm: Add CQHCI support for sdhci-msm
2017-08-30 12:59 [RFC 0/4] mmc: sdhci-msm: Add CQE support for sdhci-msm Ritesh Harjani
2017-08-30 12:59 ` [RFC 1/4] mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU Ritesh Harjani
@ 2017-08-30 12:59 ` Ritesh Harjani
2017-08-30 12:59 ` [RFC 3/4] mmc: sdhci-msm: Change the desc_sz on cqe_enable/disable Ritesh Harjani
2017-08-30 12:59 ` [RFC 4/4] mmc: sdhci-msm: Handle unexpected interrupt case on enabling legacy IRQs on CQE halt Ritesh Harjani
3 siblings, 0 replies; 8+ messages in thread
From: Ritesh Harjani @ 2017-08-30 12:59 UTC (permalink / raw)
To: ulf.hansson, adrian.hunter
Cc: linux-mmc, linux-kernel, stummala, asutoshd, Ritesh Harjani
From: Ritesh Harjani <riteshh@codeaurora.org>
This adds CQHCI support for sdhci-msm platforms.
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
---
.../devicetree/bindings/mmc/sdhci-msm.txt | 1 +
drivers/mmc/host/Kconfig | 1 +
drivers/mmc/host/sdhci-msm.c | 90 +++++++++++++++++++++-
3 files changed, 91 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 0576264..897294f 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -5,6 +5,7 @@ and the properties used by the sdhci-msm driver.
Required properties:
- compatible: Should contain "qcom,sdhci-msm-v4".
+- compatible: "qcom,sdhci-msm-cqe" - Optional in case the controller support CQE.
- reg: Base address and length of the register in the following order:
- Host controller register map (required)
- SD Core register map (required)
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index b8c9ea5..a2524c7 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -430,6 +430,7 @@ config MMC_SDHCI_MSM
tristate "Qualcomm SDHCI Controller Support"
depends on ARCH_QCOM || (ARM && COMPILE_TEST)
depends on MMC_SDHCI_PLTFM
+ select MMC_CQHCI
help
This selects the Secure Digital Host Controller Interface (SDHCI)
support present in Qualcomm SOCs. The controller supports
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index df66724..346cdfb 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -23,6 +23,7 @@
#include <linux/iopoll.h>
#include "sdhci-pltfm.h"
+#include "cqhci.h"
#define CORE_MCI_VERSION 0x50
#define CORE_VERSION_MAJOR_SHIFT 28
@@ -1092,8 +1093,87 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock)
__sdhci_msm_set_clock(host, clock);
}
+/*****************************************************************************\
+ * *
+ * MSM Command Queue Engine (CQE) *
+ * *
+\*****************************************************************************/
+
+static u32 sdhci_msm_cqe_irq(struct sdhci_host *host, u32 intmask)
+{
+ int cmd_error = 0;
+ int data_error = 0;
+
+ if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+ return intmask;
+
+ cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+ return 0;
+}
+
+static const struct cqhci_host_ops sdhci_msm_cqhci_ops = {
+ .enable = sdhci_cqe_enable,
+ .disable = sdhci_cqe_disable,
+};
+
+#ifdef CONFIG_MMC_CQHCI
+static int sdhci_msm_cqe_add_host(struct sdhci_host *host,
+ struct platform_device *pdev)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ struct cqhci_host *cq_host;
+ bool dma64;
+ int ret;
+
+ ret = sdhci_setup_host(host);
+ if (ret)
+ return ret;
+
+ cq_host = cqhci_pltfm_init(pdev);
+ if (IS_ERR(cq_host)) {
+ ret = PTR_ERR(cq_host);
+ dev_err(&pdev->dev, "cqhci-pltfm init: failed: %d\n", ret);
+ goto cleanup;
+ }
+
+ msm_host->mmc->caps2 |= MMC_CAP2_CQE;
+ cq_host->ops = &sdhci_msm_cqhci_ops;
+
+ dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
+ if (dma64)
+ cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
+
+ ret = cqhci_init(cq_host, host->mmc, dma64);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: CQE init: failed (%d)\n", mmc_hostname(host->mmc),
+ ret);
+ goto cleanup;
+ }
+
+ ret = __sdhci_add_host(host);
+ if (ret)
+ goto cleanup;
+
+ dev_info(&pdev->dev, "%s: CQE init: success\n", mmc_hostname(host->mmc));
+ return ret;
+
+cleanup:
+ sdhci_cleanup_host(host);
+ return ret;
+}
+#else
+static void sdhci_msm_cqe_add_host(struct sdhci_host *host,
+ struct platform_device *pdev)
+{
+ dev_warn(&pdev->dev, "CQE config not enabled, defaulting to sdhci\n");
+ return sdhci_add_host(host);
+}
+#endif /* CONFIG_MMC_CQHCI */
+
static const struct of_device_id sdhci_msm_dt_match[] = {
{ .compatible = "qcom,sdhci-msm-v4" },
+ { .compatible = "qcom,sdhci-msm-cqe" },
{},
};
@@ -1107,6 +1187,7 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock)
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = sdhci_msm_set_uhs_signaling,
.voltage_switch = sdhci_msm_voltage_switch,
+ .irq = sdhci_msm_cqe_irq,
};
static const struct sdhci_pltfm_data sdhci_msm_pdata = {
@@ -1125,6 +1206,7 @@ static int sdhci_msm_probe(struct platform_device *pdev)
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_msm_host *msm_host;
struct resource *core_memres;
+ struct device_node *node = pdev->dev.of_node;
int ret;
u16 host_version, core_minor;
u32 core_version, config;
@@ -1277,7 +1359,13 @@ static int sdhci_msm_probe(struct platform_device *pdev)
pm_runtime_use_autosuspend(&pdev->dev);
host->mmc_host_ops.execute_tuning = sdhci_msm_execute_tuning;
- ret = sdhci_add_host(host);
+
+ if (of_device_is_compatible(node, "qcom,sdhci-msm-cqe")) {
+ dev_dbg(&pdev->dev, "node with qcom,sdhci-msm-cqe\n");
+ ret = sdhci_msm_cqe_add_host(host, pdev);
+ } else {
+ ret = sdhci_add_host(host);
+ }
if (ret)
goto pm_runtime_disable;
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC 3/4] mmc: sdhci-msm: Change the desc_sz on cqe_enable/disable.
2017-08-30 12:59 [RFC 0/4] mmc: sdhci-msm: Add CQE support for sdhci-msm Ritesh Harjani
2017-08-30 12:59 ` [RFC 1/4] mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU Ritesh Harjani
2017-08-30 12:59 ` [RFC 2/4] mmc: sdhci-msm: Add CQHCI support for sdhci-msm Ritesh Harjani
@ 2017-08-30 12:59 ` Ritesh Harjani
2017-08-30 12:59 ` [RFC 4/4] mmc: sdhci-msm: Handle unexpected interrupt case on enabling legacy IRQs on CQE halt Ritesh Harjani
3 siblings, 0 replies; 8+ messages in thread
From: Ritesh Harjani @ 2017-08-30 12:59 UTC (permalink / raw)
To: ulf.hansson, adrian.hunter
Cc: linux-mmc, linux-kernel, stummala, asutoshd, Ritesh Harjani
From: Ritesh Harjani <riteshh@codeaurora.org>
When CMDQ is halted the HW expects descriptor size to
be same which is using in CMDQ mode.
Thus adjust the desc_sz of sdhci accordingly.
Without this patch below command gives ADMA error
when CQE is enabled.
cat /sys/kernel/debug/mmc0/mmc0:0001/ext_csd
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
---
drivers/mmc/host/sdhci-msm.c | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 346cdfb..baa3409 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -1111,9 +1111,29 @@ static u32 sdhci_msm_cqe_irq(struct sdhci_host *host, u32 intmask)
return 0;
}
+void sdhci_msm_cqe_enable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ if (host->flags & SDHCI_USE_64_BIT_DMA)
+ host->desc_sz = 12;
+
+ sdhci_cqe_enable(mmc);
+}
+
+void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ if (host->flags & SDHCI_USE_64_BIT_DMA)
+ host->desc_sz = 16;
+
+ sdhci_cqe_disable(mmc, recovery);
+}
+
static const struct cqhci_host_ops sdhci_msm_cqhci_ops = {
- .enable = sdhci_cqe_enable,
- .disable = sdhci_cqe_disable,
+ .enable = sdhci_msm_cqe_enable,
+ .disable = sdhci_msm_cqe_disable,
};
#ifdef CONFIG_MMC_CQHCI
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [RFC 4/4] mmc: sdhci-msm: Handle unexpected interrupt case on enabling legacy IRQs on CQE halt
2017-08-30 12:59 [RFC 0/4] mmc: sdhci-msm: Add CQE support for sdhci-msm Ritesh Harjani
` (2 preceding siblings ...)
2017-08-30 12:59 ` [RFC 3/4] mmc: sdhci-msm: Change the desc_sz on cqe_enable/disable Ritesh Harjani
@ 2017-08-30 12:59 ` Ritesh Harjani
3 siblings, 0 replies; 8+ messages in thread
From: Ritesh Harjani @ 2017-08-30 12:59 UTC (permalink / raw)
To: ulf.hansson, adrian.hunter
Cc: linux-mmc, linux-kernel, stummala, asutoshd, Ritesh Harjani
From: Ritesh Harjani <riteshh@codeaurora.org>
There is a case when enabling the legacy IRQs and halting CQE is
resuling into a command response interrupt without any command in
progress. This patch handles such case here.
Error signature without this patch:-
mmc0: Got command interrupt 0x00000001 even though no command operation
was in progress.
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
---
drivers/mmc/host/sdhci-msm.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index baa3409..8fdc2c0 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -1124,10 +1124,21 @@ void sdhci_msm_cqe_enable(struct mmc_host *mmc)
void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery)
{
struct sdhci_host *host = mmc_priv(mmc);
+ unsigned long flags;
+ u32 ctrl;
if (host->flags & SDHCI_USE_64_BIT_DMA)
host->desc_sz = 16;
+ spin_lock_irqsave(&host->lock, flags);
+
+ ctrl = sdhci_readl(host, SDHCI_INT_ENABLE);
+ ctrl |= SDHCI_INT_RESPONSE;
+ sdhci_writel(host, ctrl, SDHCI_INT_ENABLE);
+ sdhci_writel(host, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
sdhci_cqe_disable(mmc, recovery);
}
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
^ permalink raw reply related [flat|nested] 8+ messages in thread