diff mbox

[v3,07/13] mmc: mmci: add ddrmode mask to variant data

Message ID 1400849515-7343-1-git-send-email-srinivas.kandagatla@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Srinivas Kandagatla May 23, 2014, 12:51 p.m. UTC 
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch adds ddrmode mask to variant structure giving more flexibility
to the driver to support more SOCs which have different datactrl register
layout.

Without this patch datactrl register is updated with wrong ddrmode mask on non
ST SOCs, resulting in card detection failures.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/mmc/host/mmci.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Comments

Ulf Hansson May 26, 2014, 9:53 a.m. UTC | #1 
On 23 May 2014 14:51,  <srinivas.kandagatla@linaro.org> wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>
> This patch adds ddrmode mask to variant structure giving more flexibility
> to the driver to support more SOCs which have different datactrl register
> layout.
>
> Without this patch datactrl register is updated with wrong ddrmode mask on non
> ST SOCs, resulting in card detection failures.
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  drivers/mmc/host/mmci.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 1385554..dec70d2 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -59,6 +59,7 @@ static unsigned int fmax = 515633;
>   *               is asserted (likewise for RX)
>   * @sdio: variant supports SDIO
>   * @st_clkdiv: true if using a ST-specific clock divider algorithm
> + * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
>   * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
>   * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
>   *                  register
> @@ -76,6 +77,7 @@ struct variant_data {
>         unsigned int            datalength_bits;
>         unsigned int            fifosize;
>         unsigned int            fifohalfsize;
> +       unsigned int            datactrl_mask_ddrmode;
>         bool                    sdio;
>         bool                    st_clkdiv;
>         bool                    blksz_datactrl16;
> @@ -114,6 +116,7 @@ static struct variant_data variant_u300 = {
>         .fifosize               = 16 * 4,
>         .fifohalfsize           = 8 * 4,
>         .clkreg_enable          = MCI_ST_U300_HWFCEN,
> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>         .datalength_bits        = 16,
>         .sdio                   = true,
>         .pwrreg_powerup         = MCI_PWR_ON,
> @@ -126,6 +129,7 @@ static struct variant_data variant_nomadik = {
>         .fifosize               = 16 * 4,
>         .fifohalfsize           = 8 * 4,
>         .clkreg                 = MCI_CLK_ENABLE,
> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>         .datalength_bits        = 24,
>         .sdio                   = true,
>         .st_clkdiv              = true,
> @@ -140,6 +144,7 @@ static struct variant_data variant_ux500 = {
>         .fifohalfsize           = 8 * 4,
>         .clkreg                 = MCI_CLK_ENABLE,
>         .clkreg_enable          = MCI_ST_UX500_HWFCEN,
> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>         .datalength_bits        = 24,
>         .sdio                   = true,
>         .st_clkdiv              = true,
> @@ -155,6 +160,7 @@ static struct variant_data variant_ux500v2 = {
>         .fifohalfsize           = 8 * 4,
>         .clkreg                 = MCI_CLK_ENABLE,
>         .clkreg_enable          = MCI_ST_UX500_HWFCEN,
> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,

Only the ux500v2 supports DDR mode, using the MCI_ST_DPSM_DDRMODE bit.

>         .datalength_bits        = 24,
>         .sdio                   = true,
>         .st_clkdiv              = true,
> @@ -800,7 +806,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
>                 }
>
>         if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
> -               datactrl |= MCI_ST_DPSM_DDRMODE;
> +               datactrl |= variant->datactrl_mask_ddrmode;
>
>         /*
>          * Attempt to use DMA operation mode, if this
> --
> 1.9.1
>

Kind regards
Ulf Hansson
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Srinivas Kandagatla May 26, 2014, 5:06 p.m. UTC | #2 
On 26/05/14 10:53, Ulf Hansson wrote:
> On 23 May 2014 14:51,  <srinivas.kandagatla@linaro.org> wrote:
>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>>
>> This patch adds ddrmode mask to variant structure giving more flexibility
>> to the driver to support more SOCs which have different datactrl register
>> layout.
>>
>> Without this patch datactrl register is updated with wrong ddrmode mask on non
>> ST SOCs, resulting in card detection failures.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
>> ---
>>   drivers/mmc/host/mmci.c | 8 +++++++-
>>   1 file changed, 7 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
>> index 1385554..dec70d2 100644
>> --- a/drivers/mmc/host/mmci.c
>> +++ b/drivers/mmc/host/mmci.c
>> @@ -59,6 +59,7 @@ static unsigned int fmax = 515633;
>>    *               is asserted (likewise for RX)
>>    * @sdio: variant supports SDIO
>>    * @st_clkdiv: true if using a ST-specific clock divider algorithm
>> + * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
>>    * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
>>    * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
>>    *                  register
>> @@ -76,6 +77,7 @@ struct variant_data {
>>          unsigned int            datalength_bits;
>>          unsigned int            fifosize;
>>          unsigned int            fifohalfsize;
>> +       unsigned int            datactrl_mask_ddrmode;
>>          bool                    sdio;
>>          bool                    st_clkdiv;
>>          bool                    blksz_datactrl16;
>> @@ -114,6 +116,7 @@ static struct variant_data variant_u300 = {
>>          .fifosize               = 16 * 4,
>>          .fifohalfsize           = 8 * 4,
>>          .clkreg_enable          = MCI_ST_U300_HWFCEN,
>> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>>          .datalength_bits        = 16,
>>          .sdio                   = true,
>>          .pwrreg_powerup         = MCI_PWR_ON,
>> @@ -126,6 +129,7 @@ static struct variant_data variant_nomadik = {
>>          .fifosize               = 16 * 4,
>>          .fifohalfsize           = 8 * 4,
>>          .clkreg                 = MCI_CLK_ENABLE,
>> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>>          .datalength_bits        = 24,
>>          .sdio                   = true,
>>          .st_clkdiv              = true,
>> @@ -140,6 +144,7 @@ static struct variant_data variant_ux500 = {
>>          .fifohalfsize           = 8 * 4,
>>          .clkreg                 = MCI_CLK_ENABLE,
>>          .clkreg_enable          = MCI_ST_UX500_HWFCEN,
>> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>>          .datalength_bits        = 24,
>>          .sdio                   = true,
>>          .st_clkdiv              = true,
>> @@ -155,6 +160,7 @@ static struct variant_data variant_ux500v2 = {
>>          .fifohalfsize           = 8 * 4,
>>          .clkreg                 = MCI_CLK_ENABLE,
>>          .clkreg_enable          = MCI_ST_UX500_HWFCEN,
>> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>
> Only the ux500v2 supports DDR mode, using the MCI_ST_DPSM_DDRMODE bit.

Thanks for pointing this out, I was not sure which variants actually 
used this bit, so just replicated what was there before this change.

I will add this flag to only ux500v2 in next version.


Thanks,
srini
>
>>          .datalength_bits        = 24,
>>          .sdio                   = true,
>>          .st_clkdiv              = true,
>> @@ -800,7 +806,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
>>                  }
>>
>>          if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
>> -               datactrl |= MCI_ST_DPSM_DDRMODE;
>> +               datactrl |= variant->datactrl_mask_ddrmode;
>>
>>          /*
>>           * Attempt to use DMA operation mode, if this
>> --
>> 1.9.1
>>
>
> Kind regards
> Ulf Hansson
>
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diff mbox

Patch

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 1385554..dec70d2 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -59,6 +59,7 @@  static unsigned int fmax = 515633;
  *		  is asserted (likewise for RX)
  * @sdio: variant supports SDIO
  * @st_clkdiv: true if using a ST-specific clock divider algorithm
+ * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
  * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
  * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
  *		     register
@@ -76,6 +77,7 @@  struct variant_data {
 	unsigned int		datalength_bits;
 	unsigned int		fifosize;
 	unsigned int		fifohalfsize;
+	unsigned int		datactrl_mask_ddrmode;
 	bool			sdio;
 	bool			st_clkdiv;
 	bool			blksz_datactrl16;
@@ -114,6 +116,7 @@  static struct variant_data variant_u300 = {
 	.fifosize		= 16 * 4,
 	.fifohalfsize		= 8 * 4,
 	.clkreg_enable		= MCI_ST_U300_HWFCEN,
+	.datactrl_mask_ddrmode	= MCI_ST_DPSM_DDRMODE,
 	.datalength_bits	= 16,
 	.sdio			= true,
 	.pwrreg_powerup		= MCI_PWR_ON,
@@ -126,6 +129,7 @@  static struct variant_data variant_nomadik = {
 	.fifosize		= 16 * 4,
 	.fifohalfsize		= 8 * 4,
 	.clkreg			= MCI_CLK_ENABLE,
+	.datactrl_mask_ddrmode	= MCI_ST_DPSM_DDRMODE,
 	.datalength_bits	= 24,
 	.sdio			= true,
 	.st_clkdiv		= true,
@@ -140,6 +144,7 @@  static struct variant_data variant_ux500 = {
 	.fifohalfsize		= 8 * 4,
 	.clkreg			= MCI_CLK_ENABLE,
 	.clkreg_enable		= MCI_ST_UX500_HWFCEN,
+	.datactrl_mask_ddrmode	= MCI_ST_DPSM_DDRMODE,
 	.datalength_bits	= 24,
 	.sdio			= true,
 	.st_clkdiv		= true,
@@ -155,6 +160,7 @@  static struct variant_data variant_ux500v2 = {
 	.fifohalfsize		= 8 * 4,
 	.clkreg			= MCI_CLK_ENABLE,
 	.clkreg_enable		= MCI_ST_UX500_HWFCEN,
+	.datactrl_mask_ddrmode	= MCI_ST_DPSM_DDRMODE,
 	.datalength_bits	= 24,
 	.sdio			= true,
 	.st_clkdiv		= true,
@@ -800,7 +806,7 @@  static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
 		}
 
 	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
-		datactrl |= MCI_ST_DPSM_DDRMODE;
+		datactrl |= variant->datactrl_mask_ddrmode;
 
 	/*
 	 * Attempt to use DMA operation mode, if this