[PATCH v3 06/11] mmc: sdhci: reduce code duplication for aligned buffer

[Jaehoon Chung]

On 2/14/20 4:40 PM, Masahiro Yamada wrote:
> The same code is run for both SDHCI_QUIRK_32BIT_DMA_ADDR and
> define(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER).
> 
> Unify the code.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>

Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>

Best Regards,
Jaehoon Chung

> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/mmc/sdhci.c | 22 ++++++++--------------
>  include/sdhci.h     |  2 ++
>  2 files changed, 10 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
> index 18fbcb5f1864..b4713e7b9bba 100644
> --- a/drivers/mmc/sdhci.c
> +++ b/drivers/mmc/sdhci.c
> @@ -140,27 +140,16 @@ static void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data,
>  	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
>  
>  	if (host->flags & USE_SDMA) {
> -		if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
> -		    (host->start_addr & 0x7) != 0x0) {
> +		if (host->force_align_buffer ||
> +		    (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR &&
> +		     (host->start_addr & 0x7) != 0x0)) {
>  			*is_aligned = 0;
>  			host->start_addr = (unsigned long)host->align_buffer;
>  			if (data->flags != MMC_DATA_READ)
>  				memcpy(host->align_buffer, data->src,
>  				       trans_bytes);
>  		}
> -
> -#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
> -		/*
> -		 * Always use this bounce-buffer when
> -		 * CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
> -		 */
> -		*is_aligned = 0;
> -		host->start_addr = (unsigned long)host->align_buffer;
> -		if (data->flags != MMC_DATA_READ)
> -			memcpy(host->align_buffer, data->src, trans_bytes);
> -#endif
>  		sdhci_writel(host, host->start_addr, SDHCI_DMA_ADDRESS);
> -
>  	} else if (host->flags & (USE_ADMA | USE_ADMA64)) {
>  		sdhci_prepare_adma_table(host, data);
>  
> @@ -627,6 +616,11 @@ static int sdhci_init(struct mmc *mmc)
>  
>  #if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
>  	host->align_buffer = (void *)CONFIG_FIXED_SDHCI_ALIGNED_BUFFER;
> +	/*
> +	 * Always use this bounce-buffer when CONFIG_FIXED_SDHCI_ALIGNED_BUFFER
> +	 * is defined.
> +	 */
> +	host->force_align_buffer = true;
>  #else
>  	if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) {
>  		host->align_buffer = memalign(8, 512 * 1024);
> diff --git a/include/sdhci.h b/include/sdhci.h
> index 1358218270b8..7f8feefa450b 100644
> --- a/include/sdhci.h
> +++ b/include/sdhci.h
> @@ -9,6 +9,7 @@
>  #ifndef __SDHCI_HW_H
>  #define __SDHCI_HW_H
>  
> +#include <linux/types.h>
>  #include <asm/io.h>
>  #include <mmc.h>
>  #include <asm/gpio.h>
> @@ -322,6 +323,7 @@ struct sdhci_host {
>  
>  	struct mmc_config cfg;
>  	void *align_buffer;
> +	bool force_align_buffer;
>  	dma_addr_t start_addr;
>  	int flags;
>  #define USE_SDMA	(0x1 << 0)
>