linux-kernel - Re: [PATCH V14 16/21] mmc: sdhci-uhs2: add request() and others

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Message-ID: <e7d7a434-665b-4912-a2ae-a51e10e332d5@intel.com>
Date: Tue, 30 Jan 2024 17:31:27 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: Victor Shih <victorshihgli@...il.com>, ulf.hansson@...aro.org
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
 benchuanggli@...il.com, HL.Liu@...esyslogic.com.tw,
 Greg.tu@...esyslogic.com.tw, takahiro.akashi@...aro.org,
 dlunev@...omium.org, Ben Chuang <ben.chuang@...esyslogic.com.tw>,
 Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V14 16/21] mmc: sdhci-uhs2: add request() and others

On 23/01/24 08:28, Victor Shih wrote:
> From: Victor Shih <victor.shih@...esyslogic.com.tw>
> 
> This is a sdhci version of mmc's request operation.
> It covers both UHS-I and UHS-II.
> 
> Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
> Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
> ---
> 
> Updates in V14:
>  - Use mmc_card_uhs2() to stead sdhci_uhs2_mode() in the
>    sdhci_uhs2_request().
> 
> Updates in V13:
>  - Re-order function to avoid declaration.
>  - Remove unnecessary function.
> 
> Updates in V11:
>  - Drop the check mmc_card_uhs2_hd_mode(host->mmc)
>    in sdhci_uhs2_set_transfer_mode().
> 
> Updates in V10:
>  - Use tmode_half_duplex to instead of uhs2_tmode0_flag
>    in sdhci_uhs2_set_transfer_mode().
> 
> Updates in V9:
>  - Modify the annotations in __sdhci_uhs2_send_command().
> 
> Updates in V8:
>  - Adjust the position of matching brackets in
>    sdhci_uhs2_send_command_retry().
>  - Modify CameCase definition in __sdhci_uhs2_finish_command().
>  - Modify error message in __sdhci_uhs2_finish_command().
>  - sdhci_uhs2_send_command_retry() to instead of sdhci_uhs2_send_command()
>    in sdhci_uhs2_request().
>  - Use sdhci_uhs2_mode() to simplify code in sdhci_uhs2_request_atomic().
>  - Add forward declaration for sdhci_send_command().
> 
> Updates in V7:
>  - Cancel export state of some functions.
>  - Remove unnecessary whitespace changes.
> 
> Updates in V6:
>  - Add uhs2_dev_cmd() to simplify code.
>  - Remove unnecessary functions.
>  - Cancel export state of some functions.
>  - Drop use CONFIG_MMC_DEBUG().
>  - Wrap at 100 columns in some functions.
> 
> ---
> 
>  drivers/mmc/host/sdhci-uhs2.c | 379 +++++++++++++++++++++++++++++++++-
>  drivers/mmc/host/sdhci.c      |  49 +++--
>  drivers/mmc/host/sdhci.h      |   8 +
>  3 files changed, 420 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> index 0c543899ed6c..b47bcf6f890f 100644
> --- a/drivers/mmc/host/sdhci-uhs2.c
> +++ b/drivers/mmc/host/sdhci-uhs2.c
> @@ -14,6 +14,8 @@
>  #include <linux/module.h>
>  #include <linux/iopoll.h>
>  #include <linux/bitfield.h>
> +#include <linux/mmc/mmc.h>
> +#include <linux/mmc/host.h>
>  
>  #include "sdhci.h"
>  #include "sdhci-uhs2.h"
> @@ -29,6 +31,8 @@
>  #define UHS2_INTERFACE_DETECT_TIMEOUT_100MS	100000
>  #define UHS2_LANE_SYNC_TIMEOUT_150MS		150000
>  
> +#define UHS2_ARG_IOADR_MASK 0xfff
> +
>  void sdhci_uhs2_dump_regs(struct sdhci_host *host)
>  {
>  	if (!(mmc_card_uhs2(host->mmc)))
> @@ -63,6 +67,11 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs);
>   *                                                                           *
>  \*****************************************************************************/
>  
> +static inline u16 uhs2_dev_cmd(struct mmc_command *cmd)
> +{
> +	return be16_to_cpu((__be16)cmd->uhs2_cmd->arg) & UHS2_ARG_IOADR_MASK;
> +}
> +
>  static inline int mmc_opt_regulator_set_ocr(struct mmc_host *mmc,
>  					    struct regulator *supply,
>  					    unsigned short vdd_bit)
> @@ -140,7 +149,7 @@ static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, un
>  
>  static u8 sdhci_calc_timeout_uhs2(struct sdhci_host *host, u8 *cmd_res, u8 *dead_lock)
>  {
> -	/* timeout in us */
> +	/* timeout in us */#define UHS2_ARG_IOADR_MASK 0xfff

Extraneous "#define UHS2_ARG_IOADR_MASK 0xfff"