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Commit 36809d1c authored by Tingwei Zhang's avatar Tingwei Zhang
Browse files

soc: qcom: Add a snapshot of QDSS bridge driver 



This is the snapshot of the QDSS bridge driver as of msm-4.14 commit
4f22a43 (soc: qcom: qdss_bridge: Add spin_lock for accessing lists).
Use DEVICE_ATTR_RW for mode.

Change-Id: I5fcd2ea772ff47e5fc9e4c4b35a5f954e593e066
Signed-off-by: default avatarTingwei Zhang <tingwei@codeaurora.org>
parent bdd918fd

drivers/soc/qcom/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -531,6 +531,15 @@ config QCOM_GLINK_PKT 
	  This enable the userspace clients to read and write to

	  some glink packets channel.



config QCOM_QDSS_BRIDGE

	bool "Configure bridge driver for QTI/Qualcomm Technologies, Inc. MDM"

	depends on MHI_BUS

	help

	  The driver will help route diag traffic from modem side over the QDSS

	  sub-system to USB on APSS side. The driver acts as a bridge between the

	  MHI and USB interface.

	  If unsure, say N.



config MSM_CDSP_LOADER

	tristate "CDSP loader support"

	help

drivers/soc/qcom/Makefile

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@@ -58,6 +58,7 @@ obj-$(CONFIG_QCOM_BUS_SCALING) += msm_bus/ 
obj-$(CONFIG_QCOM_FSA4480_I2C) += fsa4480-i2c.o

obj-$(CONFIG_QCOM_GLINK) += glink_probe.o

obj-$(CONFIG_QCOM_GLINK_PKT) += glink_pkt.o

obj-$(CONFIG_QCOM_QDSS_BRIDGE) += qdss_bridge.o

obj-$(CONFIG_QSEE_IPC_IRQ) += qsee_ipc_irq.o

obj-$(CONFIG_QSEE_IPC_IRQ_BRIDGE) += qsee_ipc_irq_bridge.o

obj-$(CONFIG_QPNP_PBS) += qpnp-pbs.o

drivers/soc/qcom/qdss_bridge.c

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+932 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/soc/qcom/qdss_bridge.h

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/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

 */



#ifndef _QDSS_BRIDGE_H

#define _QDSS_BRIDGE_H



struct qdss_buf_tbl_lst {

	struct list_head link;

	unsigned char *buf;

	struct qdss_request *usb_req;

	atomic_t available;

};



struct qdss_mhi_buf_tbl_t {

	struct list_head link;

	unsigned char *buf;

	size_t len;

};



enum mhi_transfer_mode {

	MHI_TRANSFER_TYPE_USB,

	MHI_TRANSFER_TYPE_UCI,

};



enum open_status {

	DISABLE,

	ENABLE,

	SSR,

};



struct qdss_bridge_drvdata {

	int alias;

	enum open_status opened;

	struct completion completion;

	size_t mtu;

	enum mhi_transfer_mode mode;

	spinlock_t lock;

	struct device *dev;

	struct cdev cdev;

	struct mhi_device *mhi_dev;

	struct work_struct read_work;

	struct work_struct read_done_work;

	struct work_struct open_work;

	struct work_struct close_work;

	struct workqueue_struct *mhi_wq;

	struct mhi_client_handle *hdl;

	struct mhi_client_info_t *client_info;

	struct list_head buf_tbl;

	struct list_head mhi_buf_tbl;

	struct list_head read_done_list;

	struct usb_qdss_ch *usb_ch;

	struct qdss_mhi_buf_tbl_t *cur_buf;

	wait_queue_head_t uci_wq;

	size_t rx_size;

};



#endif