On 19 September 2014 06:48, Kuninori Morimoto
<[email protected]> wrote:
>
> Hi Ulf
>
> ping ?
>
>> From: Kuninori Morimoto <[email protected]>
>>
>> Current tmio is using sd_ctrl_read16/write16_rep()
>> for data transfer.
>> It works if transfer size was even number,
>> but, last 1 byte will be ignored if
>> transfer size was odd number.
>> This patch adds new tmio_mmc_transfer_data()
>> and solve this issue.
>>
>> Tested-by: Shinobu Uehara <[email protected]>
>> Signed-off-by: Kuninori Morimoto <[email protected]>
Thanks! Applied for next.
Kind regards
Uffe
>> ---
>> v2 -> v3
>>
>> - remove cast
>> - remove extra variable
>>
>> drivers/mmc/host/tmio_mmc_pio.c | 39
>> +++++++++++++++++++++++++++++++++++----
>> 1 file changed, 35 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/mmc/host/tmio_mmc_pio.c
>> b/drivers/mmc/host/tmio_mmc_pio.c
>> index ff5ff0f..692e578 100644
>> --- a/drivers/mmc/host/tmio_mmc_pio.c
>> +++ b/drivers/mmc/host/tmio_mmc_pio.c
>> @@ -376,6 +376,40 @@ static int tmio_mmc_start_command(struct tmio_mmc_host
>> *host, struct mmc_command
>> return 0;
>> }
>>
>> +static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
>> + unsigned short *buf,
>> + unsigned int count)
>> +{
>> + int is_read = host->data->flags & MMC_DATA_READ;
>> + u8 *buf8;
>> +
>> + /*
>> + * Transfer the data
>> + */
>> + if (is_read)
>> + sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
>> + else
>> + sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
>> +
>> + /* if count was even number */
>> + if (!(count & 0x1))
>> + return;
>> +
>> + /* if count was odd number */
>> + buf8 = (u8 *)(buf + (count >> 1));
>> +
>> + /*
>> + * FIXME
>> + *
>> + * driver and this function are assuming that
>> + * it is used as little endian
>> + */
>> + if (is_read)
>> + *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff;
>> + else
>> + sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8);
>> +}
>> +
>> /*
>> * This chip always returns (at least?) as much data as you ask for.
>> * I'm unsure what happens if you ask for less than a block. This should be
>> @@ -408,10 +442,7 @@ static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
>> count, host->sg_off, data->flags);
>>
>> /* Transfer the data */
>> - if (data->flags & MMC_DATA_READ)
>> - sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
>> - else
>> - sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
>> + tmio_mmc_transfer_data(host, buf, count);
>>
>> host->sg_off += count;
>>
>> --
>> 1.7.9.5
>>
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