MHI_STATUS probe_clients(mhi_device_ctxt *mhi_dev_ctxt,STATE_TRANSITION new_state) { int ret_val = 0; if (new_state == STATE_TRANSITION_AMSS) { probe_clients(mhi_dev_ctxt, STATE_TRANSITION_SBL); mhi_dev_ctxt->mhi_rmnet_dev = platform_device_alloc("mhi_rmnet",-1); ret_val = platform_device_add(mhi_dev_ctxt->mhi_rmnet_dev); if (ret_val) mhi_log(MHI_MSG_CRITICAL, "Failed to add MHI_RmNET device.\n"); } else if (new_state == STATE_TRANSITION_SBL) { if (0 == mhi_dev_ctxt->flags.uci_probed) { mhi_dev_ctxt->mhi_uci_dev = platform_device_alloc("mhi_uci",-1); ret_val = platform_device_add(mhi_dev_ctxt->mhi_uci_dev); if (ret_val) mhi_log(MHI_MSG_CRITICAL, "Failed to add MHI_SHIM device.\n"); mhi_dev_ctxt->flags.uci_probed = 1; } } return ret_val; }
MHI_STATUS process_SBL_transition(mhi_device_ctxt *mhi_dev_ctxt, STATE_TRANSITION cur_work_item) { MHI_STATUS ret_val; u32 chan; mhi_chan_ctxt *chan_ctxt; mhi_log(MHI_MSG_INFO, "Processing SBL state transition\n"); for (chan = 0; chan <= MHI_CLIENT_SAHARA_IN; ++chan) { chan_ctxt = &mhi_dev_ctxt->mhi_ctrl_seg->mhi_cc_list[chan]; if (MHI_CHAN_STATE_ENABLED == chan_ctxt->mhi_chan_state ) { ret_val = mhi_send_cmd(mhi_dev_ctxt, MHI_COMMAND_START_CHAN, chan); if (MHI_STATUS_SUCCESS != ret_val) { mhi_log(MHI_MSG_VERBOSE, "Starting Channel 0x%x \n", chan); mhi_log(MHI_MSG_CRITICAL, "Failed to start chan0x%x, ret 0x%x\n", chan, ret_val); return MHI_STATUS_ERROR; } else { atomic_inc( &mhi_dev_ctxt->start_cmd_pending_ack); } } wait_event_interruptible(*mhi_dev_ctxt->chan_start_complete, atomic_read(&mhi_dev_ctxt->start_cmd_pending_ack) == 0); } if (!mhi_dev_ctxt->flags.mhi_clients_probed) { ret_val = probe_clients(mhi_dev_ctxt, cur_work_item); } return MHI_STATUS_SUCCESS; }
MHI_STATUS process_AMSS_transition(mhi_device_ctxt *mhi_dev_ctxt, STATE_TRANSITION cur_work_item) { MHI_STATUS ret_val; u32 chan; unsigned long flags; mhi_chan_ctxt *chan_ctxt; mhi_log(MHI_MSG_INFO, "Processing AMSS state transition\n"); write_lock_irqsave(&mhi_dev_ctxt->xfer_lock, flags); atomic_inc(&mhi_dev_ctxt->flags.data_pending); mhi_assert_device_wake(mhi_dev_ctxt); write_unlock_irqrestore(&mhi_dev_ctxt->xfer_lock, flags); ret_val = mhi_add_elements_to_event_rings(mhi_dev_ctxt, cur_work_item); if (MHI_STATUS_SUCCESS != ret_val) return MHI_STATUS_ERROR; for (chan = 0; chan <= MHI_MAX_CHANNELS; ++chan) { if (VALID_CHAN_NR(chan)) { chan_ctxt = &mhi_dev_ctxt->mhi_ctrl_seg->mhi_cc_list[chan]; if (MHI_CHAN_STATE_ENABLED == chan_ctxt->mhi_chan_state) { mhi_log(MHI_MSG_INFO, "Starting Channel 0x%x \n", chan); ret_val = mhi_send_cmd(mhi_dev_ctxt, MHI_COMMAND_START_CHAN, chan); if (MHI_STATUS_SUCCESS != ret_val) { mhi_log(MHI_MSG_CRITICAL, "Failed to start chan0x%x,0x%x\n", chan, ret_val); return MHI_STATUS_ERROR; } else { atomic_inc( &mhi_dev_ctxt->start_cmd_pending_ack); } } } } mhi_log(MHI_MSG_INFO, "Waiting for cmd completions\n"); wait_event_interruptible(*mhi_dev_ctxt->chan_start_complete, atomic_read(&mhi_dev_ctxt->start_cmd_pending_ack) == 0); if (0 == mhi_dev_ctxt->flags.mhi_initialized) { mhi_dev_ctxt->flags.mhi_initialized = 1; ret_val = mhi_set_state_of_all_channels(mhi_dev_ctxt, MHI_CHAN_STATE_RUNNING); if (MHI_STATUS_SUCCESS != ret_val) mhi_log(MHI_MSG_CRITICAL, "Failed to set local chan state\n"); if (!mhi_dev_ctxt->flags.mhi_clients_probed) { ret_val = probe_clients(mhi_dev_ctxt, cur_work_item); if (ret_val != MHI_STATUS_SUCCESS) mhi_log(MHI_MSG_CRITICAL, "Failed to probe MHI CORE clients.\n"); mhi_dev_ctxt->flags.mhi_clients_probed = 1; ring_all_ev_dbs(mhi_dev_ctxt); ring_all_chan_dbs(mhi_dev_ctxt); ring_all_cmd_dbs(mhi_dev_ctxt); } else { ring_all_chan_dbs(mhi_dev_ctxt); mhi_log(MHI_MSG_CRITICAL, "Notifying clients that MHI is enabled\n"); mhi_notify_clients(mhi_dev_ctxt, MHI_CB_MHI_ENABLED); } if (ret_val != MHI_STATUS_SUCCESS) mhi_log(MHI_MSG_CRITICAL, "Failed to probe MHI CORE clients, ret 0x%x \n", ret_val); } atomic_dec(&mhi_dev_ctxt->flags.data_pending); mhi_log(MHI_MSG_INFO, "Exited\n"); return MHI_STATUS_SUCCESS; }