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99 lines
2.6 KiB
99 lines
2.6 KiB
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) |
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/* |
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* Copyright 2013-2016 Freescale Semiconductor Inc. |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/fsl/mc.h> |
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#include "fsl-mc-private.h" |
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/** |
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* dpmcp_open() - Open a control session for the specified object. |
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* @mc_io: Pointer to MC portal's I/O object |
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' |
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* @dpmcp_id: DPMCP unique ID |
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* @token: Returned token; use in subsequent API calls |
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* |
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* This function can be used to open a control session for an |
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* already created object; an object may have been declared in |
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* the DPL or by calling the dpmcp_create function. |
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* This function returns a unique authentication token, |
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* associated with the specific object ID and the specific MC |
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* portal; this token must be used in all subsequent commands for |
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* this specific object |
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* |
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* Return: '0' on Success; Error code otherwise. |
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*/ |
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int dpmcp_open(struct fsl_mc_io *mc_io, |
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u32 cmd_flags, |
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int dpmcp_id, |
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u16 *token) |
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{ |
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struct fsl_mc_command cmd = { 0 }; |
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struct dpmcp_cmd_open *cmd_params; |
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int err; |
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/* prepare command */ |
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cmd.header = mc_encode_cmd_header(DPMCP_CMDID_OPEN, |
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cmd_flags, 0); |
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cmd_params = (struct dpmcp_cmd_open *)cmd.params; |
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cmd_params->dpmcp_id = cpu_to_le32(dpmcp_id); |
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/* send command to mc*/ |
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err = mc_send_command(mc_io, &cmd); |
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if (err) |
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return err; |
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/* retrieve response parameters */ |
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*token = mc_cmd_hdr_read_token(&cmd); |
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return err; |
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} |
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/** |
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* dpmcp_close() - Close the control session of the object |
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* @mc_io: Pointer to MC portal's I/O object |
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' |
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* @token: Token of DPMCP object |
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* |
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* After this function is called, no further operations are |
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* allowed on the object without opening a new control session. |
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* |
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* Return: '0' on Success; Error code otherwise. |
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*/ |
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int dpmcp_close(struct fsl_mc_io *mc_io, |
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u32 cmd_flags, |
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u16 token) |
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{ |
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struct fsl_mc_command cmd = { 0 }; |
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/* prepare command */ |
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cmd.header = mc_encode_cmd_header(DPMCP_CMDID_CLOSE, |
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cmd_flags, token); |
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/* send command to mc*/ |
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return mc_send_command(mc_io, &cmd); |
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} |
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/** |
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* dpmcp_reset() - Reset the DPMCP, returns the object to initial state. |
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* @mc_io: Pointer to MC portal's I/O object |
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' |
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* @token: Token of DPMCP object |
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* |
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* Return: '0' on Success; Error code otherwise. |
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*/ |
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int dpmcp_reset(struct fsl_mc_io *mc_io, |
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u32 cmd_flags, |
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u16 token) |
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{ |
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struct fsl_mc_command cmd = { 0 }; |
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/* prepare command */ |
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cmd.header = mc_encode_cmd_header(DPMCP_CMDID_RESET, |
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cmd_flags, token); |
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/* send command to mc*/ |
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return mc_send_command(mc_io, &cmd); |
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}
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