+ Lee
On 12 September 2016 at 16:15, Chris Brandt <chris.brandt@xxxxxxxxxxx> wrote:
> For the r7s72100 SOC, the DATA_PORT register was changed to 32-bits wide.
> Therefore a new flag has been created that will allow 32-bit reads/writes
> to the DATA_PORT register instead of 16-bit (because 16-bits accesses are
> not supported).
>
> Signed-off-by: Chris Brandt <chris.brandt@xxxxxxxxxxx>
> ---
> v3:
> * changed loops to memcpy
> v2:
> * changed 'data * 0xFF' to 'data & 0xFF'
> * added 'const' for sd_ctrl_write32_rep
> ---
> drivers/mmc/host/tmio_mmc.h | 12 ++++++++++++
> drivers/mmc/host/tmio_mmc_pio.c | 30 ++++++++++++++++++++++++++++++
> include/linux/mfd/tmio.h | 5 +++++
This header file needs to be split up. The mmc specific bits, should
be moved to a local header file under driver/mmc/host/*.
Sure, we don't need to do that as part of $subject patch, but then I
need an ack from Lee Jones, the mfd maintainer. I have added him on
cc.
> 3 files changed, 47 insertions(+)
>
> diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
> index ecb99fc..a99e634 100644
> --- a/drivers/mmc/host/tmio_mmc.h
> +++ b/drivers/mmc/host/tmio_mmc.h
> @@ -237,6 +237,12 @@ static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int ad
> readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
> }
>
> +static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr,
> + u32 *buf, int count)
> +{
> + readsl(host->ctl + (addr << host->bus_shift), buf, count);
> +}
> +
> static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
> {
> /* If there is a hook and it returns non-zero then there
> @@ -259,4 +265,10 @@ static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int
> writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
> }
>
> +static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr,
> + const u32 *buf, int count)
> +{
> + writesl(host->ctl + (addr << host->bus_shift), buf, count);
> +}
> +
> #endif
> diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
> index 017a4dc..59fac7d 100644
> --- a/drivers/mmc/host/tmio_mmc_pio.c
> +++ b/drivers/mmc/host/tmio_mmc_pio.c
> @@ -443,6 +443,36 @@ static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
> /*
> * Transfer the data
> */
> + if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
> + u8 data[4] = { };
> +
> + if (is_read)
> + sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
> + count >> 2);
> + else
> + sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
> + count >> 2);
> +
> + /* if count was multiple of 4 */
> + if (!(count & 0x3))
> + return;
> +
> + buf8 = (u8 *)(buf + (count >> 2));
> + count %= 4;
> +
> + if (is_read) {
> + sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
> + (u32 *)data, 1);
> + memcpy(buf8, data, count);
> + } else {
> + memcpy(data, buf8, count);
> + sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
> + (u32 *)data, 1);
> + }
> +
> + return;
> + }
> +
> if (is_read)
> sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
> else
> diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
> index 3b95dc7..0dbcb7e 100644
> --- a/include/linux/mfd/tmio.h
> +++ b/include/linux/mfd/tmio.h
> @@ -100,6 +100,11 @@
> #define TMIO_MMC_SDIO_STATUS_QUIRK (1 << 8)
>
> /*
> + * Some controllers have a 32-bit wide data port register
> + */
> +#define TMIO_MMC_32BIT_DATA_PORT (1 << 9)
> +
> +/*
> * Some controllers allows to set SDx actual clock
> */
> #define TMIO_MMC_CLK_ACTUAL (1 << 10)
> --
> 2.9.2
>
>
Kind regards
Uffe
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