* [PATCH V1] mmc: tegra: support SDHCI SPEC 300
@ 2012-04-18 13:18 Pavan Kunapuli
2012-04-18 16:52 ` Stephen Warren
0 siblings, 1 reply; 3+ messages in thread
From: Pavan Kunapuli @ 2012-04-18 13:18 UTC (permalink / raw)
To: cjb, swarren, paul.gortmaker, olof, rmk+kernel, linux-mmc, linux-kernel
Cc: Pavan Kunapuli
Tegra3 SDHOST controller doesn't advertise
v3.00 support by default. This support has to
be enabled by configuring a vendor register in
the tegra3 sd host address space.
Signed-off-by: Pavan Kunapuli <pkunapuli@nvidia.com>
---
drivers/mmc/host/sdhci-tegra.c | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 53b2650..cff0c52 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -32,8 +32,13 @@
#include "sdhci-pltfm.h"
+/* Tegra SDHOST controller vendor register definitions */
+#define SDHCI_TEGRA_VENDOR_MISC_CTRL 0x120
+#define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20
+
#define NVQUIRK_FORCE_SDHCI_SPEC_200 BIT(0)
#define NVQUIRK_ENABLE_BLOCK_GAP_DET BIT(1)
+#define NVQUIRK_ENABLE_SDHCI_SPEC_300 BIT(2)
struct sdhci_tegra_soc_data {
struct sdhci_pltfm_data *pdata;
@@ -120,6 +125,25 @@ static irqreturn_t carddetect_irq(int irq, void *data)
return IRQ_HANDLED;
};
+static void tegra_sdhci_reset_exit(struct sdhci_host *host, u8 mask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_tegra *tegra_host = pltfm_host->priv;
+ const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data;
+
+ if (!(mask & SDHCI_RESET_ALL))
+ return;
+
+ /* Erratum: Enable SDHCI spec v3.00 support */
+ if (soc_data->nvquirks & NVQUIRK_ENABLE_SDHCI_SPEC_300) {
+ u32 misc_ctrl;
+
+ misc_ctrl = sdhci_readb(host, SDHCI_TEGRA_VENDOR_MISC_CTRL);
+ misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300;
+ sdhci_writeb(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL);
+ }
+}
+
static int tegra_sdhci_8bit(struct sdhci_host *host, int bus_width)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -148,6 +172,7 @@ static struct sdhci_ops tegra_sdhci_ops = {
.read_w = tegra_sdhci_readw,
.write_l = tegra_sdhci_writel,
.platform_8bit_width = tegra_sdhci_8bit,
+ .platform_reset_exit = tegra_sdhci_reset_exit,
};
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
@@ -178,6 +203,7 @@ static struct sdhci_pltfm_data sdhci_tegra30_pdata = {
static struct sdhci_tegra_soc_data soc_data_tegra30 = {
.pdata = &sdhci_tegra30_pdata,
+ .nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300,
};
#endif
--
1.7.1.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH V1] mmc: tegra: support SDHCI SPEC 300
2012-04-18 13:18 [PATCH V1] mmc: tegra: support SDHCI SPEC 300 Pavan Kunapuli
@ 2012-04-18 16:52 ` Stephen Warren
2012-04-19 0:07 ` Chris Ball
0 siblings, 1 reply; 3+ messages in thread
From: Stephen Warren @ 2012-04-18 16:52 UTC (permalink / raw)
To: Pavan Kunapuli
Cc: cjb, swarren, paul.gortmaker, olof, rmk+kernel, linux-mmc, linux-kernel
On 04/18/2012 07:18 AM, Pavan Kunapuli wrote:
> Tegra3 SDHOST controller doesn't advertise
> v3.00 support by default. This support has to
> be enabled by configuring a vendor register in
> the tegra3 sd host address space.
>
> Signed-off-by: Pavan Kunapuli <pkunapuli@nvidia.com>
FWIW,
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH V1] mmc: tegra: support SDHCI SPEC 300
2012-04-18 16:52 ` Stephen Warren
@ 2012-04-19 0:07 ` Chris Ball
0 siblings, 0 replies; 3+ messages in thread
From: Chris Ball @ 2012-04-19 0:07 UTC (permalink / raw)
To: Stephen Warren
Cc: Pavan Kunapuli, swarren, paul.gortmaker, olof, rmk+kernel,
linux-mmc, linux-kernel
Hi,
On Wed, Apr 18 2012, Stephen Warren wrote:
> On 04/18/2012 07:18 AM, Pavan Kunapuli wrote:
>> Tegra3 SDHOST controller doesn't advertise
>> v3.00 support by default. This support has to
>> be enabled by configuring a vendor register in
>> the tegra3 sd host address space.
>>
>> Signed-off-by: Pavan Kunapuli <pkunapuli@nvidia.com>
>
> FWIW,
>
> Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Thanks, pushed to mmc-next for 3.5.
- Chris.
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-04-18 16:52 ` Stephen Warren
2012-04-19 0:07 ` Chris Ball
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