diff options
author | Bhaumik Bhatt <bbhatt@codeaurora.org> | 2022-04-18 20:50:26 +0300 |
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committer | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2022-04-23 16:27:32 +0300 |
commit | d126bfeaf72161c4028769d735ce4a778a029657 (patch) | |
tree | 950a2a96b38c5b06cffa1639a160949bb66c0848 /drivers/bus/mhi | |
parent | 0bca889fd6fe6fbedf6de6f807c8f588cb4e639d (diff) | |
download | linux-d126bfeaf72161c4028769d735ce4a778a029657.tar.xz |
bus: mhi: host: Optimize and update MMIO register write method
As of now, MMIO writes done after ready state transition use the
mhi_write_reg_field() API even though the whole register is being
written in most cases. Optimize this process by using mhi_write_reg()
API instead for those writes and use the mhi_write_reg_field()
API for MHI config registers only.
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1650304226-11080-3-git-send-email-quic_jhugo@quicinc.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/bus/mhi')
-rw-r--r-- | drivers/bus/mhi/host/init.c | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c index 38426111cf6e..cbb86b21063e 100644 --- a/drivers/bus/mhi/host/init.c +++ b/drivers/bus/mhi/host/init.c @@ -439,74 +439,65 @@ int mhi_init_mmio(struct mhi_controller *mhi_cntrl) struct device *dev = &mhi_cntrl->mhi_dev->dev; struct { u32 offset; - u32 mask; u32 val; } reg_info[] = { { - CCABAP_HIGHER, U32_MAX, + CCABAP_HIGHER, upper_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr), }, { - CCABAP_LOWER, U32_MAX, + CCABAP_LOWER, lower_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr), }, { - ECABAP_HIGHER, U32_MAX, + ECABAP_HIGHER, upper_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr), }, { - ECABAP_LOWER, U32_MAX, + ECABAP_LOWER, lower_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr), }, { - CRCBAP_HIGHER, U32_MAX, + CRCBAP_HIGHER, upper_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr), }, { - CRCBAP_LOWER, U32_MAX, + CRCBAP_LOWER, lower_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr), }, { - MHICFG, MHICFG_NER_MASK, - mhi_cntrl->total_ev_rings, - }, - { - MHICFG, MHICFG_NHWER_MASK, - mhi_cntrl->hw_ev_rings, - }, - { - MHICTRLBASE_HIGHER, U32_MAX, + MHICTRLBASE_HIGHER, upper_32_bits(mhi_cntrl->iova_start), }, { - MHICTRLBASE_LOWER, U32_MAX, + MHICTRLBASE_LOWER, lower_32_bits(mhi_cntrl->iova_start), }, { - MHIDATABASE_HIGHER, U32_MAX, + MHIDATABASE_HIGHER, upper_32_bits(mhi_cntrl->iova_start), }, { - MHIDATABASE_LOWER, U32_MAX, + MHIDATABASE_LOWER, lower_32_bits(mhi_cntrl->iova_start), }, { - MHICTRLLIMIT_HIGHER, U32_MAX, + MHICTRLLIMIT_HIGHER, upper_32_bits(mhi_cntrl->iova_stop), }, { - MHICTRLLIMIT_LOWER, U32_MAX, + MHICTRLLIMIT_LOWER, lower_32_bits(mhi_cntrl->iova_stop), }, { - MHIDATALIMIT_HIGHER, U32_MAX, + MHIDATALIMIT_HIGHER, upper_32_bits(mhi_cntrl->iova_stop), }, { - MHIDATALIMIT_LOWER, U32_MAX, + MHIDATALIMIT_LOWER, lower_32_bits(mhi_cntrl->iova_stop), }, - { 0, 0, 0 } + {0, 0} }; dev_dbg(dev, "Initializing MHI registers\n"); @@ -547,13 +538,22 @@ int mhi_init_mmio(struct mhi_controller *mhi_cntrl) mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING].ring.db_addr = base + CRDB_LOWER; /* Write to MMIO registers */ - for (i = 0; reg_info[i].offset; i++) { - ret = mhi_write_reg_field(mhi_cntrl, base, reg_info[i].offset, - reg_info[i].mask, reg_info[i].val); - if (ret) { - dev_err(dev, "Unable to write to MMIO registers\n"); - return ret; - } + for (i = 0; reg_info[i].offset; i++) + mhi_write_reg(mhi_cntrl, base, reg_info[i].offset, + reg_info[i].val); + + ret = mhi_write_reg_field(mhi_cntrl, base, MHICFG, MHICFG_NER_MASK, + mhi_cntrl->total_ev_rings); + if (ret) { + dev_err(dev, "Unable to write MHICFG register\n"); + return ret; + } + + ret = mhi_write_reg_field(mhi_cntrl, base, MHICFG, MHICFG_NHWER_MASK, + mhi_cntrl->hw_ev_rings); + if (ret) { + dev_err(dev, "Unable to write MHICFG register\n"); + return ret; } return 0; |