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Commit 66a25bec authored by Vivek Pernamitta's avatar Vivek Pernamitta Committed by Gerrit - the friendly Code Review server
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msm: mhi: Check ERRDBG registers for device status 



Add support to check RDDM cookie in ERRDBG1,ERRDBG2 and ERRDBG3
registers to debug the the bootup failure when device
failed to enter MISSION mode.

Change-Id: Idaf00c082ffda97805e958ae083a331d9f0909e9
Signed-off-by: default avatarVivek Pernamitta <vpernami@codeaurora.org>
Signed-off-by: default avatarRamya SR <rsr@codeaurora.org>
parent f89c40b1

drivers/bus/mhi/core/mhi_boot.c

+26 −7
Original line number Original line Diff line number Diff line
@@ -143,6 +143,17 @@ bool mhi_scan_rddm_cookie(struct mhi_controller *mhi_cntrl, u32 cookie) 
{

{

	int ret;

	int ret;

	u32 val;

	u32 val;

	int i;

	bool result = false;

	struct {

		char *name;

		u32 offset;

	} error_reg[] = {

		{ "ERROR_DBG1", BHI_ERRDBG1 },

		{ "ERROR_DBG2", BHI_ERRDBG2 },

		{ "ERROR_DBG3", BHI_ERRDBG3 },

		{ NULL },

	};





	if (!mhi_cntrl->rddm_supported || !cookie)

	if (!mhi_cntrl->rddm_supported || !cookie)

		return false;

		return false;
@@ -152,15 +163,23 @@ bool mhi_scan_rddm_cookie(struct mhi_controller *mhi_cntrl, u32 cookie) 
	if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))

	if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))

		return false;

		return false;





	ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_ERRDBG2, &val);

	/* look for an RDDM cookie match in any of the error debug registers */

	for (i = 0; error_reg[i].name; i++) {

		ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi,

				   error_reg[i].offset, &val);

		if (ret)

		if (ret)

		return false;

			break;

		MHI_CNTRL_LOG("reg:%s value:0x%x\n", error_reg[i].name, val);





	MHI_CNTRL_LOG("BHI_ERRDBG2 value:0x%x\n", val);

		if (!(val ^ cookie)) {

	if (val == cookie)

			MHI_CNTRL_ERR("RDDM cookie found in %s\n",

					error_reg[i].name);

			return true;

			return true;

		}

	}





	return false;

	MHI_CNTRL_ERR("RDDM cookie not found\n");

	return result;

}

}

EXPORT_SYMBOL(mhi_scan_rddm_cookie);

EXPORT_SYMBOL(mhi_scan_rddm_cookie);