On recent MSMs, ADM (Data Mover) HW is not present which means existing SDCC driver can perform data transfer in PIO (peripheral IO) mode only. But PIO mode requires lot of CPU attention which would mean consuming extra CPU MIPS. As a replacement on these recent MSMs, there is a new DMA HW engine named SPS-BAM (as part of Smart Peripheral System of MSM) is added for data movement between SDCC core and system memory. This patch has done changes in existing MSM SDCC driver for using SPS-BAM as DMA engine. This patch is just for early review. This patch is dependent on following 2 patches: https://patchwork.kernel.org/patch/586271/ http://www.spinics.net/lists/arm-kernel/msg118467.html Subhash Jadavani (1): mmc: msm_sdcc: Use SPS BAM as DMA engine drivers/mmc/host/Kconfig | 10 + drivers/mmc/host/Makefile | 1 + drivers/mmc/host/msm_sdcc.c | 929 +++++++++++++++++++++++++++++++++++++-- drivers/mmc/host/msm_sdcc.h | 47 ++ drivers/mmc/host/msm_sdcc_dml.c | 303 +++++++++++++ drivers/mmc/host/msm_sdcc_dml.h | 120 +++++ 6 files changed, 1374 insertions(+), 36 deletions(-) create mode 100644 drivers/mmc/host/msm_sdcc_dml.c create mode 100644 drivers/mmc/host/msm_sdcc_dml.h -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
