platform: msm: Add snapshot of USB BAM driver (d08e0522) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/platform/msm/Kconfig

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		@@ -124,7 +124,7 @@ config IPA_EMULATION
		shall be connected via PCIE to X86 machine.

		config USB_BAM
		bool "USB BAM Driver"
		tristate "USB BAM Driver"
		depends on SPS && USB_GADGET
		help
		Enabling this option adds USB BAM Driver.

drivers/platform/msm/Makefile

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		@@ -6,3 +6,4 @@
		obj-$(CONFIG_GSI) += gsi/
		obj-$(CONFIG_IPA3) += ipa/
		obj-$(CONFIG_MSM_GENI_SE) += msm-geni-se.o
		obj-$(CONFIG_USB_BAM) += usb_bam.o

drivers/platform/msm/usb_bam.c

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File added.

Preview size limit exceeded, changes collapsed.

include/linux/usb_bam.h

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		/* SPDX-License-Identifier: GPL-2.0-only */
		/*
		* Copyright (c) 2011-2017, 2019 The Linux Foundation. All rights reserved.
		*/

		#ifndef _USB_BAM_H_
		#define _USB_BAM_H_

		#include <linux/msm-sps.h>
		#include <linux/device.h>
		#include <linux/errno.h>
		#include <linux/types.h>

		#define MAX_BAMS NUM_CTRL /* Bam per USB controllers */

		/* Supported USB controllers*/
		enum usb_ctrl {
		USB_CTRL_UNUSED = 0,
		NUM_CTRL,
		};

		enum peer_bam {
		QDSS_P_BAM = 0,
		MAX_PEER_BAMS,
		};

		enum usb_bam_pipe_dir {
		USB_TO_PEER_PERIPHERAL,
		PEER_PERIPHERAL_TO_USB,
		};

		enum usb_pipe_mem_type {
		SPS_PIPE_MEM = 0, /* Default, SPS dedicated pipe memory */
		SYSTEM_MEM, /* System RAM, requires allocation */
		OCI_MEM, /* Shared memory among peripherals */
		};

		enum usb_bam_pipe_type {
		USB_BAM_PIPE_BAM2BAM = 0, /* Connection is BAM2BAM (default) */
		USB_BAM_PIPE_SYS2BAM, /* Connection is SYS2BAM or BAM2SYS
		* depending on usb_bam_pipe_dir
		*/
		USB_BAM_MAX_PIPE_TYPES,
		};

		#if IS_ENABLED(CONFIG_USB_BAM)
		/**
		* Connect USB-to-Peripheral SPS connection.
		*
		* This function returns the allocated pipe number.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @idx - Connection index.
		*
		* @bam_pipe_idx - allocated pipe index.
		*
		* @iova - IPA address of USB peer BAM (i.e. QDSS BAM)
		*
		* @return 0 on success, negative value on error
		*
		*/
		int usb_bam_connect(enum usb_ctrl bam_type, int idx, u32 *bam_pipe_idx,
		unsigned long iova);

		/**
		* Register a wakeup callback from peer BAM.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @idx - Connection index.
		*
		* @callback - the callback function
		*
		* @return 0 on success, negative value on error
		*/
		int usb_bam_register_wake_cb(enum usb_ctrl bam_type, u8 idx,
		int (callback)(void ), void *param);

		/**
		* Register callbacks for start/stop of transfers.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @idx - Connection index
		*
		* @start - the callback function that will be called in USB
		* driver to start transfers
		* @stop - the callback function that will be called in USB
		* driver to stop transfers
		*
		* @param - context that the caller can supply
		*
		* @return 0 on success, negative value on error
		*/
		int usb_bam_register_start_stop_cbs(enum usb_ctrl bam_type,
		u8 idx,
		void (start)(void , enum usb_bam_pipe_dir),
		void (stop)(void , enum usb_bam_pipe_dir),
		void *param);

		/**
		* Disconnect USB-to-Periperal SPS connection.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @idx - Connection index.
		*
		* @return 0 on success, negative value on error
		*/
		int usb_bam_disconnect_pipe(enum usb_ctrl bam_type, u8 idx);

		/**
		* Returns usb bam connection parameters.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @idx - Connection index.
		*
		* @usb_bam_pipe_idx - Usb bam pipe index.
		*
		* @desc_fifo - Descriptor fifo parameters.
		*
		* @data_fifo - Data fifo parameters.
		*
		* @return pipe index on success, negative value on error.
		*/
		int get_bam2bam_connection_info(enum usb_ctrl bam_type, u8 idx,
		u32 usb_bam_pipe_idx, struct sps_mem_buffer desc_fifo,
		struct sps_mem_buffer data_fifo, enum usb_pipe_mem_type mem_type);

		/**
		* Returns usb bam connection parameters for qdss pipe.
		* @usb_bam_handle - Usb bam handle.
		* @usb_bam_pipe_idx - Usb bam pipe index.
		* @peer_pipe_idx - Peer pipe index.
		* @desc_fifo - Descriptor fifo parameters.
		* @data_fifo - Data fifo parameters.
		* @return pipe index on success, negative value on error.
		*/
		int get_qdss_bam_connection_info(
		unsigned long usb_bam_handle, u32 usb_bam_pipe_idx,
		u32 peer_pipe_idx, struct sps_mem_buffer desc_fifo,
		struct sps_mem_buffer data_fifo, enum usb_pipe_mem_type mem_type);

		/*
		* Indicates if the client of the USB BAM is ready to start
		* sending/receiving transfers.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @client - Usb pipe peer (a2, ipa, qdss...)
		*
		* @dir - In (from peer to usb) or out (from usb to peer)
		*
		* @num - Pipe number.
		*
		* @return 0 on success, negative value on error
		*/
		int usb_bam_get_connection_idx(enum usb_ctrl bam_type, enum peer_bam client,
		enum usb_bam_pipe_dir dir, u32 num);

		/*
		* return the usb controller bam type used for the supplied connection index
		*
		* @core_name - Core name (ssusb/hsusb/hsic).
		*
		* @return usb control bam type
		*/
		enum usb_ctrl usb_bam_get_bam_type(const char *core_name);

		/*
		* Indicates the type of connection the USB side of the connection is.
		*
		* @bam_type - USB BAM type - dwc3/CI/hsic
		*
		* @idx - Pipe number.
		*
		* @type - Type of connection
		*
		* @return 0 on success, negative value on error
		*/
		int usb_bam_get_pipe_type(enum usb_ctrl bam_type,
		u8 idx, enum usb_bam_pipe_type *type);

		/* Allocates memory for data fifo and descriptor fifos. */
		int usb_bam_alloc_fifos(enum usb_ctrl cur_bam, u8 idx);

		/* Frees memory for data fifo and descriptor fifos. */
		int usb_bam_free_fifos(enum usb_ctrl cur_bam, u8 idx);
		int get_qdss_bam_info(enum usb_ctrl cur_bam, u8 idx,
		phys_addr_t p_addr, u32 bam_size);
		#else
		static inline int usb_bam_connect(enum usb_ctrl bam, u8 idx, u32 *bam_pipe_idx,
		unsigned long iova)
		{
		return -ENODEV;
		}

		static inline int usb_bam_register_wake_cb(enum usb_ctrl bam_type, u8 idx,
		int (callback)(void ), void *param)
		{
		return -ENODEV;
		}

		static inline int usb_bam_register_start_stop_cbs(enum usb_ctrl bam, u8 idx,
		void (start)(void , enum usb_bam_pipe_dir),
		void (stop)(void , enum usb_bam_pipe_dir),
		void *param)
		{
		return -ENODEV;
		}

		static inline int usb_bam_disconnect_pipe(enum usb_ctrl bam_type, u8 idx)
		{
		return -ENODEV;
		}

		static inline int get_bam2bam_connection_info(enum usb_ctrl bam_type, u8 idx,
		u32 usb_bam_pipe_idx, struct sps_mem_buffer desc_fifo,
		struct sps_mem_buffer data_fifo, enum usb_pipe_mem_type mem_type)
		{
		return -ENODEV;
		}

		static inline int get_qdss_bam_connection_info(
		unsigned long usb_bam_handle, u32 usb_bam_pipe_idx,
		u32 peer_pipe_idx, struct sps_mem_buffer desc_fifo,
		struct sps_mem_buffer data_fifo, enum usb_pipe_mem_type mem_type)
		{
		return -ENODEV;
		}

		static inline int usb_bam_get_connection_idx(enum usb_ctrl bam_type,
		enum peer_bam client, enum usb_bam_pipe_dir dir, u32 num)
		{
		return -ENODEV;
		}

		static inline enum usb_ctrl usb_bam_get_bam_type(const char *core_nam)
		{
		return -ENODEV;
		}

		static inline int usb_bam_get_pipe_type(enum usb_ctrl bam_type, u8 idx,
		enum usb_bam_pipe_type *type)
		{
		return -ENODEV;
		}

		static inline int usb_bam_alloc_fifos(enum usb_ctrl cur_bam, u8 idx)
		{
		return false;
		}

		static inline int usb_bam_free_fifos(enum usb_ctrl cur_bam, u8 idx)
		{
		return false;
		}

		static inline int get_qdss_bam_info(enum usb_ctrl cur_bam, u8 idx,
		phys_addr_t p_addr, u32 bam_size)
		{
		return false;
		}
		#endif

		/* CONFIG_PM */
		#ifdef CONFIG_PM
		static inline int get_pm_runtime_counter(struct device *dev)
		{
		return atomic_read(&dev->power.usage_count);
		}
		#else
		/* !CONFIG_PM */
		static inline int get_pm_runtime_counter(struct device *dev)
		{ return -EOPNOTSUPP; }
		#endif
		#endif /* _USB_BAM_H_ */