evie/android_kernel_oneplus_msm8998
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mhi: core: Support BHI error register read

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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: Andrei Danaila <adanaila@codeaurora.org>
Signed-off-by: Tony Truong <truong@codeaurora.org>
This commit is contained in:
Tony Truong 2015-10-06 14:17:02 -07:00 • committed by David Keitel
parent b755b7ceb4
commit bf52eb669d
1 changed files with 10 additions and 2 deletions
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12
drivers/platform/msm/mhi/mhi_bhi.c
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@ -1,4 +1,4 @@
/* 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",