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Commit 4d07888c authored by Tony Truong's avatar Tony Truong Committed by Gerrit - the friendly Code Review server
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mhi: core: Support BHI error register read 



In case of BHI failure, read the device BHI error registers
in the hopes of root causing the failure.

Change-Id: I0c695f7afc873d6fd5c0c9d88e9885799b228d46
Signed-off-by: default avatarAndrei Danaila <adanaila@codeaurora.org>
Signed-off-by: default avatarTony Truong <truong@codeaurora.org>
parent 7973a935

drivers/platform/msm/mhi/mhi_bhi.c

+10 −2
Original line number Diff line number Diff line 
/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -121,11 +121,19 @@ static ssize_t bhi_write(struct file *file, 
	mhi_reg_write(mhi_dev_ctxt, bhi_ctxt->bhi_base, BHI_INTVEC, 0);



	for (i = 0; i < BHI_POLL_NR_RETRIES; ++i) {

		u32 err = 0, errdbg1 = 0, errdbg2 = 0, errdbg3 = 0;



		err = mhi_reg_read(bhi_ctxt->bhi_base, BHI_ERRCODE);

		errdbg1 = mhi_reg_read(bhi_ctxt->bhi_base, BHI_ERRDBG1);

		errdbg2 = mhi_reg_read(bhi_ctxt->bhi_base, BHI_ERRDBG2);

		errdbg3 = mhi_reg_read(bhi_ctxt->bhi_base, BHI_ERRDBG3);

		tx_db_val = mhi_reg_read_field(bhi_ctxt->bhi_base,

						BHI_STATUS,

						BHI_STATUS_MASK,

						BHI_STATUS_SHIFT);

		mhi_log(MHI_MSG_CRITICAL, "BHI STATUS 0x%x\n", tx_db_val);

		mhi_log(MHI_MSG_CRITICAL,

		"BHI STATUS 0x%x, err:0x%x errdbg1:0x%x errdbg2:0x%x errdbg3:0x%x\n",

			tx_db_val, err, errdbg1, errdbg2, errdbg3);

		if (BHI_STATUS_SUCCESS != tx_db_val)

			mhi_log(MHI_MSG_CRITICAL,

				"Incorrect BHI status: %d retry: %d\n",