On Thu, 6 Dec 2018 at 16:13, Ludovic Barre <ludovic.Barre@xxxxxx> wrote:
>
> From: Ludovic Barre <ludovic.barre@xxxxxx>
>
> On cmd12 (STOP_TRANSMISSION), STM32 sdmmc variant needs to set
> cmdstop bit in command register. The CPSM ("Command Path State Machine")
> treats the command as a Stop Transmission command and signals
> abort to the DPSM ("Data Path State Machine").
>
> Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
Applied for next, thanks!
Withholding patch2 for a while, as I need some more time to review it.
Kind regards
Uffe
> ---
> drivers/mmc/host/mmci.c | 6 ++++++
> drivers/mmc/host/mmci.h | 2 ++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 13fa640..e352f5a 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -21,6 +21,7 @@
> #include <linux/err.h>
> #include <linux/highmem.h>
> #include <linux/log2.h>
> +#include <linux/mmc/mmc.h>
> #include <linux/mmc/pm.h>
> #include <linux/mmc/host.h>
> #include <linux/mmc/card.h>
> @@ -274,6 +275,7 @@ static struct variant_data variant_stm32_sdmmc = {
> .cmdreg_lrsp_crc = MCI_CPSM_STM32_LRSP_CRC,
> .cmdreg_srsp_crc = MCI_CPSM_STM32_SRSP_CRC,
> .cmdreg_srsp = MCI_CPSM_STM32_SRSP,
> + .cmdreg_stop = MCI_CPSM_STM32_CMDSTOP,
> .data_cmd_enable = MCI_CPSM_STM32_CMDTRANS,
> .irq_pio_mask = MCI_IRQ_PIO_STM32_MASK,
> .datactrl_first = true,
> @@ -1100,6 +1102,10 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
> mmci_reg_delay(host);
> }
>
> + if (host->variant->cmdreg_stop &&
> + cmd->opcode == MMC_STOP_TRANSMISSION)
> + c |= host->variant->cmdreg_stop;
> +
> c |= cmd->opcode | host->variant->cmdreg_cpsm_enable;
> if (cmd->flags & MMC_RSP_PRESENT) {
> if (cmd->flags & MMC_RSP_136)
> diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
> index 550dd39..2422909 100644
> --- a/drivers/mmc/host/mmci.h
> +++ b/drivers/mmc/host/mmci.h
> @@ -264,6 +264,7 @@ struct mmci_host;
> * @cmdreg_lrsp_crc: enable value for long response with crc
> * @cmdreg_srsp_crc: enable value for short response with crc
> * @cmdreg_srsp: enable value for short response without crc
> + * @cmdreg_stop: enable value for stop and abort transmission
> * @datalength_bits: number of bits in the MMCIDATALENGTH register
> * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY
> * is asserted (likewise for RX)
> @@ -316,6 +317,7 @@ struct variant_data {
> unsigned int cmdreg_lrsp_crc;
> unsigned int cmdreg_srsp_crc;
> unsigned int cmdreg_srsp;
> + unsigned int cmdreg_stop;
> unsigned int datalength_bits;
> unsigned int fifosize;
> unsigned int fifohalfsize;
> --
> 2.7.4
>
