RE: [PATCH] mmc: dw_mmc: Support predefined multiple block transfers.

Seungwon Jeon
2011-09-28T01:20:25Z

This is a duplicate patch from our security machine.
Please ignore this resending.

Best regards,
Seungwon Jeon.
>
> This patch adds the support for predefined multiple block read/write.
>
> Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
> ---
> drivers/mmc/host/dw_mmc.c | 32 ++++++++++++++++++++++++++------
> 1 files changed, 26 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 0ed1d28..36a5576 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -588,11 +588,10 @@ static void dw_mci_setup_bus(struct dw_mci_slot
> *slot)
> mci_writel(host, CTYPE, (slot->ctype << slot->id));
> }
>
> -static void dw_mci_start_request(struct dw_mci *host,
> - struct dw_mci_slot *slot)
> +static void __dw_mci_start_request(struct dw_mci *host,
> + struct dw_mci_slot *slot, struct mmc_command
> *cmd)
> {
> struct mmc_request *mrq;
> - struct mmc_command *cmd;
> struct mmc_data *data;
> u32 cmdflags;
>
> @@ -610,14 +609,13 @@ static void dw_mci_start_request(struct dw_mci *host,
> host->completed_events = 0;
> host->data_status = 0;
>
> - data = mrq->data;
> + data = cmd->data;
> if (data) {
> dw_mci_set_timeout(host);
> mci_writel(host, BYTCNT, data->blksz*data->blocks);
> mci_writel(host, BLKSIZ, data->blksz);
> }
>
> - cmd = mrq->cmd;
> cmdflags = dw_mci_prepare_command(slot->mmc, cmd);
>
> /* this is the first command, send the initialization clock */
> @@ -635,6 +633,16 @@ static void dw_mci_start_request(struct dw_mci *host,
> host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq-
> >stop);
> }
>
> +static void dw_mci_start_request(struct dw_mci *host,
> + struct dw_mci_slot *slot)
> +{
> + struct mmc_request *mrq = slot->mrq;
> + struct mmc_command *cmd;
> +
> + cmd = mrq->sbc ? mrq->sbc : mrq->cmd;
> + __dw_mci_start_request(host, slot, cmd);
> +}
> +
> /* must be called with host->lock held */
> static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot
> *slot,
> struct mmc_request *mrq)
> @@ -889,7 +897,13 @@ static void dw_mci_tasklet_func(unsigned long priv)
> cmd = host->cmd;
> host->cmd = NULL;
> set_bit(EVENT_CMD_COMPLETE, &host->completed_events);
> - dw_mci_command_complete(host, host->mrq->cmd);
> + dw_mci_command_complete(host, cmd);
> + if ((cmd == host->mrq->sbc) && !cmd->error) {
> + prev_state = state = STATE_SENDING_CMD;
> + __dw_mci_start_request(host, host->cur_slot,
> host->mrq->cmd);
> + goto unlock;
> + }
> +
> if (!host->mrq->data || cmd->error) {
> dw_mci_request_end(host, host->mrq);
> goto unlock;
> @@ -967,6 +981,12 @@ static void dw_mci_tasklet_func(unsigned long priv)
> goto unlock;
> }
>
> + if (host->mrq->sbc && !data->error) {
> + data->stop->error = 0;
> + dw_mci_request_end(host, host->mrq);
> + goto unlock;
> + }
> +
> prev_state = state = STATE_SENDING_STOP;
> if (!data->error)
> send_stop_cmd(host, data);
> --
> 1.7.0.4