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Commit 0d0ad5be authored by Sujeev Dias's avatar Sujeev Dias Committed by Gerrit - the friendly Code Review server
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mhi: core: add support to dump debug registers 



For debugging purpose provide a public api to dump MHI status
registers.

CRs-Fixed: 2382884
Change-Id: I012b7e1cdf598071fc0059c30f47f5bf7e28efee
Signed-off-by: default avatarSujeev Dias <sdias@codeaurora.org>
parent 409af4b4

drivers/bus/mhi/core/mhi_main.c

+51 −0
Original line number Diff line number Diff line
@@ -2224,3 +2224,54 @@ int mhi_get_remote_time(struct mhi_device *mhi_dev, 
	return ret;

}

EXPORT_SYMBOL(mhi_get_remote_time);



void mhi_debug_reg_dump(struct mhi_controller *mhi_cntrl)

{

	enum mhi_dev_state state;

	enum mhi_ee ee;

	int i, ret;

	u32 val;

	void __iomem *mhi_base = mhi_cntrl->regs;

	void __iomem *bhi_base = mhi_cntrl->bhi;

	void __iomem *bhie_base = mhi_cntrl->bhie;

	void __iomem *wake_db = mhi_cntrl->wake_db;

	struct {

		const char *name;

		int offset;

		void *base;

	} debug_reg[] = {

		{ "MHI_CNTRL", MHICTRL, mhi_base},

		{ "MHI_STATUS", MHISTATUS, mhi_base},

		{ "MHI_WAKE_DB", 0, wake_db},

		{ "BHI_EXECENV", BHI_EXECENV, bhi_base},

		{ "BHI_STATUS", BHI_STATUS, bhi_base},

		{ "BHI_ERRCODE", BHI_ERRCODE, bhi_base},

		{ "BHI_ERRDBG1", BHI_ERRDBG1, bhi_base},

		{ "BHI_ERRDBG2", BHI_ERRDBG2, bhi_base},

		{ "BHI_ERRDBG3", BHI_ERRDBG3, bhi_base},

		{ "BHIE_TXVEC_DB", BHIE_TXVECDB_OFFS, bhie_base},

		{ "BHIE_TXVEC_STATUS", BHIE_TXVECSTATUS_OFFS, bhie_base},

		{ "BHIE_RXVEC_DB", BHIE_RXVECDB_OFFS, bhie_base},

		{ "BHIE_RXVEC_STATUS", BHIE_RXVECSTATUS_OFFS, bhie_base},

		{ NULL },

	};



	MHI_LOG("host pm_state:%s dev_state:%s ee:%s\n",

		to_mhi_pm_state_str(mhi_cntrl->pm_state),

		TO_MHI_STATE_STR(mhi_cntrl->dev_state),

		TO_MHI_EXEC_STR(mhi_cntrl->ee));



	state = mhi_get_mhi_state(mhi_cntrl);

	ee = mhi_get_exec_env(mhi_cntrl);



	MHI_LOG("device ee:%s dev_state:%s\n", TO_MHI_EXEC_STR(ee),

		TO_MHI_STATE_STR(state));



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

		ret = mhi_read_reg(mhi_cntrl, debug_reg[i].base,

				   debug_reg[i].offset, &val);

		MHI_LOG("reg:%s val:0x%x, ret:%d\n", debug_reg[i].name, val,

			ret);

	}

}

EXPORT_SYMBOL(mhi_debug_reg_dump);

include/linux/mhi.h

+6 −0
Original line number Diff line number Diff line
@@ -647,6 +647,12 @@ static inline bool mhi_is_active(struct mhi_device *mhi_dev) 
		mhi_cntrl->dev_state <= MHI_STATE_M3);

}



/**

 * mhi_debug_reg_dump - dump MHI registers for debug purpose

 * @mhi_cntrl: MHI controller

 */

void mhi_debug_reg_dump(struct mhi_controller *mhi_cntrl);



#ifndef CONFIG_ARCH_QCOM



#ifdef CONFIG_MHI_DEBUG