LXR linux/drivers/bus/fsl-mc/dpbp.c

   1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
   2/*
   3 * Copyright 2013-2016 Freescale Semiconductor Inc.
   4 *
   5 */
   6#include <linux/kernel.h>
   7#include <linux/fsl/mc.h>
   8
   9#include "fsl-mc-private.h"
  10
  11/**
  12 * dpbp_open() - Open a control session for the specified object.
  13 * @mc_io:      Pointer to MC portal's I/O object
  14 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
  15 * @dpbp_id:    DPBP unique ID
  16 * @token:      Returned token; use in subsequent API calls
  17 *
  18 * This function can be used to open a control session for an
  19 * already created object; an object may have been declared in
  20 * the DPL or by calling the dpbp_create function.
  21 * This function returns a unique authentication token,
  22 * associated with the specific object ID and the specific MC
  23 * portal; this token must be used in all subsequent commands for
  24 * this specific object
  25 *
  26 * Return:      '0' on Success; Error code otherwise.
  27 */
  28int dpbp_open(struct fsl_mc_io *mc_io,
  29              u32 cmd_flags,
  30              int dpbp_id,
  31              u16 *token)
  32{
  33        struct fsl_mc_command cmd = { 0 };
  34        struct dpbp_cmd_open *cmd_params;
  35        int err;
  36
  37        /* prepare command */
  38        cmd.header = mc_encode_cmd_header(DPBP_CMDID_OPEN,
  39                                          cmd_flags, 0);
  40        cmd_params = (struct dpbp_cmd_open *)cmd.params;
  41        cmd_params->dpbp_id = cpu_to_le32(dpbp_id);
  42
  43        /* send command to mc*/
  44        err = mc_send_command(mc_io, &cmd);
  45        if (err)
  46                return err;
  47
  48        /* retrieve response parameters */
  49        *token = mc_cmd_hdr_read_token(&cmd);
  50
  51        return err;
  52}
  53EXPORT_SYMBOL_GPL(dpbp_open);
  54
  55/**
  56 * dpbp_close() - Close the control session of the object
  57 * @mc_io:      Pointer to MC portal's I/O object
  58 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
  59 * @token:      Token of DPBP object
  60 *
  61 * After this function is called, no further operations are
  62 * allowed on the object without opening a new control session.
  63 *
  64 * Return:      '0' on Success; Error code otherwise.
  65 */
  66int dpbp_close(struct fsl_mc_io *mc_io,
  67               u32 cmd_flags,
  68               u16 token)
  69{
  70        struct fsl_mc_command cmd = { 0 };
  71
  72        /* prepare command */
  73        cmd.header = mc_encode_cmd_header(DPBP_CMDID_CLOSE, cmd_flags,
  74                                          token);
  75
  76        /* send command to mc*/
  77        return mc_send_command(mc_io, &cmd);
  78}
  79EXPORT_SYMBOL_GPL(dpbp_close);
  80
  81/**
  82 * dpbp_enable() - Enable the DPBP.
  83 * @mc_io:      Pointer to MC portal's I/O object
  84 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
  85 * @token:      Token of DPBP object
  86 *
  87 * Return:      '0' on Success; Error code otherwise.
  88 */
  89int dpbp_enable(struct fsl_mc_io *mc_io,
  90                u32 cmd_flags,
  91                u16 token)
  92{
  93        struct fsl_mc_command cmd = { 0 };
  94
  95        /* prepare command */
  96        cmd.header = mc_encode_cmd_header(DPBP_CMDID_ENABLE, cmd_flags,
  97                                          token);
  98
  99        /* send command to mc*/
 100        return mc_send_command(mc_io, &cmd);
 101}
 102EXPORT_SYMBOL_GPL(dpbp_enable);
 103
 104/**
 105 * dpbp_disable() - Disable the DPBP.
 106 * @mc_io:      Pointer to MC portal's I/O object
 107 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 108 * @token:      Token of DPBP object
 109 *
 110 * Return:      '0' on Success; Error code otherwise.
 111 */
 112int dpbp_disable(struct fsl_mc_io *mc_io,
 113                 u32 cmd_flags,
 114                 u16 token)
 115{
 116        struct fsl_mc_command cmd = { 0 };
 117
 118        /* prepare command */
 119        cmd.header = mc_encode_cmd_header(DPBP_CMDID_DISABLE,
 120                                          cmd_flags, token);
 121
 122        /* send command to mc*/
 123        return mc_send_command(mc_io, &cmd);
 124}
 125EXPORT_SYMBOL_GPL(dpbp_disable);
 126
 127/**
 128 * dpbp_reset() - Reset the DPBP, returns the object to initial state.
 129 * @mc_io:      Pointer to MC portal's I/O object
 130 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 131 * @token:      Token of DPBP object
 132 *
 133 * Return:      '0' on Success; Error code otherwise.
 134 */
 135int dpbp_reset(struct fsl_mc_io *mc_io,
 136               u32 cmd_flags,
 137               u16 token)
 138{
 139        struct fsl_mc_command cmd = { 0 };
 140
 141        /* prepare command */
 142        cmd.header = mc_encode_cmd_header(DPBP_CMDID_RESET,
 143                                          cmd_flags, token);
 144
 145        /* send command to mc*/
 146        return mc_send_command(mc_io, &cmd);
 147}
 148EXPORT_SYMBOL_GPL(dpbp_reset);
 149
 150/**
 151 * dpbp_get_attributes - Retrieve DPBP attributes.
 152 *
 153 * @mc_io:      Pointer to MC portal's I/O object
 154 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 155 * @token:      Token of DPBP object
 156 * @attr:       Returned object's attributes
 157 *
 158 * Return:      '0' on Success; Error code otherwise.
 159 */
 160int dpbp_get_attributes(struct fsl_mc_io *mc_io,
 161                        u32 cmd_flags,
 162                        u16 token,
 163                        struct dpbp_attr *attr)
 164{
 165        struct fsl_mc_command cmd = { 0 };
 166        struct dpbp_rsp_get_attributes *rsp_params;
 167        int err;
 168
 169        /* prepare command */
 170        cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_ATTR,
 171                                          cmd_flags, token);
 172
 173        /* send command to mc*/
 174        err = mc_send_command(mc_io, &cmd);
 175        if (err)
 176                return err;
 177
 178        /* retrieve response parameters */
 179        rsp_params = (struct dpbp_rsp_get_attributes *)cmd.params;
 180        attr->bpid = le16_to_cpu(rsp_params->bpid);
 181        attr->id = le32_to_cpu(rsp_params->id);
 182
 183        return 0;
 184}
 185EXPORT_SYMBOL_GPL(dpbp_get_attributes);
 186