294 lines
8.0 KiB
C
294 lines
8.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2013-2016 Freescale Semiconductor Inc.
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* Copyright 2016-2018 NXP
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*/
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#include <linux/fsl/mc.h>
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#include "dprtc.h"
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#include "dprtc-cmd.h"
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/**
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* dprtc_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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* @dprtc_id: DPRTC 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 dprtc_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 dprtc_open(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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int dprtc_id,
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u16 *token)
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{
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struct dprtc_cmd_open *cmd_params;
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struct fsl_mc_command cmd = { 0 };
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int err;
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_OPEN,
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cmd_flags,
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0);
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cmd_params = (struct dprtc_cmd_open *)cmd.params;
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cmd_params->dprtc_id = cpu_to_le32(dprtc_id);
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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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*token = mc_cmd_hdr_read_token(&cmd);
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return 0;
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}
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/**
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* dprtc_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 DPRTC 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 dprtc_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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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_CLOSE, cmd_flags,
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token);
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return mc_send_command(mc_io, &cmd);
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}
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/**
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* dprtc_set_irq_enable() - Set overall interrupt 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 DPRTC object
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* @irq_index: The interrupt index to configure
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* @en: Interrupt state - enable = 1, disable = 0
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*
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* Allows GPP software to control when interrupts are generated.
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* Each interrupt can have up to 32 causes. The enable/disable control's the
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* overall interrupt state. if the interrupt is disabled no causes will cause
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* an interrupt.
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dprtc_set_irq_enable(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u8 en)
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{
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struct dprtc_cmd_set_irq_enable *cmd_params;
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struct fsl_mc_command cmd = { 0 };
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_SET_IRQ_ENABLE,
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cmd_flags,
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token);
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cmd_params = (struct dprtc_cmd_set_irq_enable *)cmd.params;
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cmd_params->irq_index = irq_index;
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cmd_params->en = en;
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return mc_send_command(mc_io, &cmd);
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}
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/**
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* dprtc_get_irq_enable() - Get overall interrupt 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 DPRTC object
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* @irq_index: The interrupt index to configure
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* @en: Returned interrupt state - enable = 1, disable = 0
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dprtc_get_irq_enable(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u8 *en)
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{
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struct dprtc_rsp_get_irq_enable *rsp_params;
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struct dprtc_cmd_get_irq *cmd_params;
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struct fsl_mc_command cmd = { 0 };
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int err;
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_GET_IRQ_ENABLE,
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cmd_flags,
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token);
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cmd_params = (struct dprtc_cmd_get_irq *)cmd.params;
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cmd_params->irq_index = irq_index;
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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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rsp_params = (struct dprtc_rsp_get_irq_enable *)cmd.params;
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*en = rsp_params->en;
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return 0;
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}
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/**
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* dprtc_set_irq_mask() - Set interrupt mask.
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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 DPRTC object
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* @irq_index: The interrupt index to configure
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* @mask: Event mask to trigger interrupt;
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* each bit:
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* 0 = ignore event
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* 1 = consider event for asserting IRQ
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*
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* Every interrupt can have up to 32 causes and the interrupt model supports
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* masking/unmasking each cause independently
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dprtc_set_irq_mask(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 mask)
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{
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struct dprtc_cmd_set_irq_mask *cmd_params;
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struct fsl_mc_command cmd = { 0 };
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_SET_IRQ_MASK,
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cmd_flags,
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token);
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cmd_params = (struct dprtc_cmd_set_irq_mask *)cmd.params;
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cmd_params->mask = cpu_to_le32(mask);
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cmd_params->irq_index = irq_index;
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return mc_send_command(mc_io, &cmd);
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}
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/**
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* dprtc_get_irq_mask() - Get interrupt mask.
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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 DPRTC object
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* @irq_index: The interrupt index to configure
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* @mask: Returned event mask to trigger interrupt
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*
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* Every interrupt can have up to 32 causes and the interrupt model supports
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* masking/unmasking each cause independently
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dprtc_get_irq_mask(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 *mask)
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{
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struct dprtc_rsp_get_irq_mask *rsp_params;
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struct dprtc_cmd_get_irq *cmd_params;
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struct fsl_mc_command cmd = { 0 };
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int err;
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_GET_IRQ_MASK,
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cmd_flags,
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token);
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cmd_params = (struct dprtc_cmd_get_irq *)cmd.params;
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cmd_params->irq_index = irq_index;
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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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rsp_params = (struct dprtc_rsp_get_irq_mask *)cmd.params;
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*mask = le32_to_cpu(rsp_params->mask);
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return 0;
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}
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/**
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* dprtc_get_irq_status() - Get the current status of any pending interrupts.
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*
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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 DPRTC object
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* @irq_index: The interrupt index to configure
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* @status: Returned interrupts status - one bit per cause:
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* 0 = no interrupt pending
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* 1 = interrupt pending
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dprtc_get_irq_status(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 *status)
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{
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struct dprtc_cmd_get_irq_status *cmd_params;
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struct dprtc_rsp_get_irq_status *rsp_params;
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struct fsl_mc_command cmd = { 0 };
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int err;
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_GET_IRQ_STATUS,
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cmd_flags,
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token);
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cmd_params = (struct dprtc_cmd_get_irq_status *)cmd.params;
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cmd_params->status = cpu_to_le32(*status);
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cmd_params->irq_index = irq_index;
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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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rsp_params = (struct dprtc_rsp_get_irq_status *)cmd.params;
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*status = le32_to_cpu(rsp_params->status);
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return 0;
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}
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/**
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* dprtc_clear_irq_status() - Clear a pending interrupt's status
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*
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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 DPRTC object
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* @irq_index: The interrupt index to configure
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* @status: Bits to clear (W1C) - one bit per cause:
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* 0 = don't change
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* 1 = clear status bit
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dprtc_clear_irq_status(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 status)
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{
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struct dprtc_cmd_clear_irq_status *cmd_params;
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struct fsl_mc_command cmd = { 0 };
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cmd.header = mc_encode_cmd_header(DPRTC_CMDID_CLEAR_IRQ_STATUS,
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cmd_flags,
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token);
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cmd_params = (struct dprtc_cmd_clear_irq_status *)cmd.params;
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cmd_params->irq_index = irq_index;
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cmd_params->status = cpu_to_le32(status);
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return mc_send_command(mc_io, &cmd);
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}
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