diff options
Diffstat (limited to 'drivers/bus/mhi/core/init.c')
| -rw-r--r-- | drivers/bus/mhi/core/init.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index fffcbcdeb6c6..e81cdd0207e2 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -843,6 +843,8 @@ EXPORT_SYMBOL_GPL(mhi_unregister_controller); int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl) { + struct device *dev = &mhi_cntrl->mhi_dev->dev; + u32 bhie_off; int ret; mutex_lock(&mhi_cntrl->pm_mutex); @@ -851,12 +853,44 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl) if (ret) goto error_dev_ctxt; + /* + * Allocate RDDM table if specified, this table is for debugging purpose + */ + if (mhi_cntrl->rddm_size) { + mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->rddm_image, + mhi_cntrl->rddm_size); + + /* + * This controller supports RDDM, so we need to manually clear + * BHIE RX registers since POR values are undefined. + */ + ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF, + &bhie_off); + if (ret) { + dev_err(dev, "Error getting BHIE offset\n"); + goto bhie_error; + } + + memset_io(mhi_cntrl->regs + bhie_off + BHIE_RXVECADDR_LOW_OFFS, + 0, BHIE_RXVECSTATUS_OFFS - BHIE_RXVECADDR_LOW_OFFS + + 4); + + if (mhi_cntrl->rddm_image) + mhi_rddm_prepare(mhi_cntrl, mhi_cntrl->rddm_image); + } + mhi_cntrl->pre_init = true; mutex_unlock(&mhi_cntrl->pm_mutex); return 0; +bhie_error: + if (mhi_cntrl->rddm_image) { + mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image); + mhi_cntrl->rddm_image = NULL; + } + error_dev_ctxt: mutex_unlock(&mhi_cntrl->pm_mutex); @@ -871,6 +905,11 @@ void mhi_unprepare_after_power_down(struct mhi_controller *mhi_cntrl) mhi_cntrl->fbc_image = NULL; } + if (mhi_cntrl->rddm_image) { + mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image); + mhi_cntrl->rddm_image = NULL; + } + mhi_deinit_dev_ctxt(mhi_cntrl); mhi_cntrl->pre_init = false; } |