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Commit 4359d63a authored by Sujeev Dias's avatar Sujeev Dias
Browse files

mhi: core: Add support for new MHI hardware channel 



Add support for new MHI hardware channel 102 to be
use by MHI clients as ADPL channel.

CRs-Fixed: 1027069
Change-Id: Ib3c2019fc269064d097bb7f40f01d4580e63a603
Signed-off-by: default avatarSujeev Dias <sdias@codeaurora.org>
parent dae56d47

drivers/platform/msm/mhi/mhi.h

+2 −8
Original line number Diff line number Diff line
@@ -277,6 +277,8 @@ struct mhi_ring { 
	u32 overwrite_en;

	enum MHI_CHAN_DIR dir;

	struct db_mode db_mode;

	u32 msi_disable_cntr;

	u32 msi_enable_cntr;

};



enum MHI_CMD_STATUS {
@@ -351,12 +353,6 @@ struct mhi_client_handle { 
	int event_ring_index;

};



enum MHI_EVENT_POLLING {

	MHI_EVENT_POLLING_DISABLED = 0x0,

	MHI_EVENT_POLLING_ENABLED = 0x1,

	MHI_EVENT_POLLING_reserved = 0x80000000

};



enum MHI_TYPE_EVENT_RING {

	MHI_ER_DATA_TYPE = 0x1,

	MHI_ER_CTRL_TYPE = 0x2,
@@ -393,8 +389,6 @@ struct mhi_counters { 
	u32 m3_event_timeouts;

	u32 m0_event_timeouts;

	u32 m2_event_timeouts;

	u32 msi_disable_cntr;

	u32 msi_enable_cntr;

	u32 nr_irq_migrations;

	u32 *msi_counter;

	u32 *ev_counter;

drivers/platform/msm/mhi/mhi_hwio.h

+9 −9
Original line number Diff line number Diff line 
/* Copyright (c) 2014, 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
@@ -23,14 +23,14 @@ 




#define MHICFG (0x10)

#define MHICFG_RESERVED_BITS31_24_MASK 0xff000000

#define MHICFG_RESERVED_BITS31_24_SHIFT 0x18

#define MHICFG_NER_MASK 0xff0000

#define MHICFG_NER_SHIFT 0x10

#define MHICFG_RESERVED_BITS15_8_MASK 0xff00

#define MHICFG_RESERVED_BITS15_8_SHIFT 0x8

#define MHICFG_NCH_MASK 0xff

#define MHICFG_NCH_SHIFT 0x0

#define MHICFG_NHWER_MASK (0xff000000)

#define MHICFG_NHWER_SHIFT (24)

#define MHICFG_NER_MASK (0xff0000)

#define MHICFG_NER_SHIFT (16)

#define MHICFG_NHWCH_MASK (0xff00)

#define MHICFG_NHWCH_SHIFT (8)

#define MHICFG_NCH_MASK (0xff)

#define MHICFG_NCH_SHIFT (0)





#define CHDBOFF (0x18)

drivers/platform/msm/mhi/mhi_isr.c

+14 −12
Original line number Diff line number Diff line
@@ -277,20 +277,22 @@ struct mhi_result *mhi_poll(struct mhi_client_handle *client_handle) 


void mhi_mask_irq(struct mhi_client_handle *client_handle)

{

	disable_irq_nosync(MSI_TO_IRQ(client_handle->mhi_dev_ctxt,

					client_handle->msi_vec));

	client_handle->mhi_dev_ctxt->counters.msi_disable_cntr++;

	if (client_handle->mhi_dev_ctxt->counters.msi_disable_cntr >

		   (client_handle->mhi_dev_ctxt->counters.msi_enable_cntr + 1))

		mhi_log(MHI_MSG_INFO, "No nested IRQ disable Allowed\n");

	struct mhi_device_ctxt *mhi_dev_ctxt =

		client_handle->mhi_dev_ctxt;

	struct mhi_ring *ev_ring = &mhi_dev_ctxt->

		mhi_local_event_ctxt[client_handle->event_ring_index];



	disable_irq_nosync(MSI_TO_IRQ(mhi_dev_ctxt, client_handle->msi_vec));

	ev_ring->msi_disable_cntr++;

}



void mhi_unmask_irq(struct mhi_client_handle *client_handle)

{

	client_handle->mhi_dev_ctxt->counters.msi_enable_cntr++;

	enable_irq(MSI_TO_IRQ(client_handle->mhi_dev_ctxt,

			client_handle->msi_vec));

	if (client_handle->mhi_dev_ctxt->counters.msi_enable_cntr >

		   client_handle->mhi_dev_ctxt->counters.msi_disable_cntr)

		mhi_log(MHI_MSG_INFO, "No nested IRQ enable Allowed\n");

	struct mhi_device_ctxt *mhi_dev_ctxt =

		client_handle->mhi_dev_ctxt;

	struct mhi_ring *ev_ring = &mhi_dev_ctxt->

		mhi_local_event_ctxt[client_handle->event_ring_index];



	ev_ring->msi_enable_cntr++;

	enable_irq(MSI_TO_IRQ(mhi_dev_ctxt, client_handle->msi_vec));

}

drivers/platform/msm/mhi/mhi_macros.h

+0 −1
Original line number Diff line number Diff line
@@ -96,7 +96,6 @@ 
				((_mhi_dev_ctxt)->mmio_info.nr_event_rings - \

				((_mhi_dev_ctxt)->mmio_info.nr_hw_event_rings)))





/* MHI Transfer Ring Elements 7.4.1*/

#define TX_TRB_LEN

#define MHI_TX_TRB_LEN__SHIFT (0)

drivers/platform/msm/mhi/mhi_mmio_ops.c

+5 −0
Original line number Diff line number Diff line
@@ -144,6 +144,11 @@ int mhi_init_mmio(struct mhi_device_ctxt *mhi_dev_ctxt) 
				MHICFG,

				MHICFG_NER_MASK, MHICFG_NER_SHIFT,

				mhi_dev_ctxt->mmio_info.nr_event_rings);

	mhi_reg_write_field(mhi_dev_ctxt, mhi_dev_ctxt->mmio_info.mmio_addr,

			    MHICFG,

			    MHICFG_NHWER_MASK,

			    MHICFG_NHWER_SHIFT,

			    mhi_dev_ctxt->mmio_info.nr_hw_event_rings);



	pcie_dword_val = mhi_dev_ctxt->dev_space.ring_ctxt.dma_cc_list;

	pcie_word_val = HIGH_WORD(pcie_dword_val);