// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2013-2016 Freescale Semiconductor Inc. * Copyright 2016-2018 NXP */ #include <linux/fsl/mc.h> #include "dprtc.h" #include "dprtc-cmd.h" /** * dprtc_open() - Open a control session for the specified object. * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @dprtc_id: DPRTC unique ID * @token: Returned token; use in subsequent API calls * * This function can be used to open a control session for an * already created object; an object may have been declared in * the DPL or by calling the dprtc_create function. * This function returns a unique authentication token, * associated with the specific object ID and the specific MC * portal; this token must be used in all subsequent commands for * this specific object * * Return: '0' on Success; Error code otherwise. */ int dprtc_open(struct fsl_mc_io *mc_io, u32 cmd_flags, int dprtc_id, u16 *token) { struct dprtc_cmd_open *cmd_params; struct fsl_mc_command cmd = { 0 }; int err; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_OPEN, cmd_flags, 0); cmd_params = (struct dprtc_cmd_open *)cmd.params; cmd_params->dprtc_id = cpu_to_le32(dprtc_id); err = mc_send_command(mc_io, &cmd); if (err) return err; *token = mc_cmd_hdr_read_token(&cmd); return 0; } /** * dprtc_close() - Close the control session of the object * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * * After this function is called, no further operations are * allowed on the object without opening a new control session. * * Return: '0' on Success; Error code otherwise. */ int dprtc_close(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token) { struct fsl_mc_command cmd = { 0 }; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_CLOSE, cmd_flags, token); return mc_send_command(mc_io, &cmd); } /** * dprtc_set_irq_enable() - Set overall interrupt state. * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * @irq_index: The interrupt index to configure * @en: Interrupt state - enable = 1, disable = 0 * * Allows GPP software to control when interrupts are generated. * Each interrupt can have up to 32 causes. The enable/disable control's the * overall interrupt state. if the interrupt is disabled no causes will cause * an interrupt. * * Return: '0' on Success; Error code otherwise. */ int dprtc_set_irq_enable(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token, u8 irq_index, u8 en) { struct dprtc_cmd_set_irq_enable *cmd_params; struct fsl_mc_command cmd = { 0 }; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_SET_IRQ_ENABLE, cmd_flags, token); cmd_params = (struct dprtc_cmd_set_irq_enable *)cmd.params; cmd_params->irq_index = irq_index; cmd_params->en = en; return mc_send_command(mc_io, &cmd); } /** * dprtc_get_irq_enable() - Get overall interrupt state * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * @irq_index: The interrupt index to configure * @en: Returned interrupt state - enable = 1, disable = 0 * * Return: '0' on Success; Error code otherwise. */ int dprtc_get_irq_enable(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token, u8 irq_index, u8 *en) { struct dprtc_rsp_get_irq_enable *rsp_params; struct dprtc_cmd_get_irq *cmd_params; struct fsl_mc_command cmd = { 0 }; int err; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_GET_IRQ_ENABLE, cmd_flags, token); cmd_params = (struct dprtc_cmd_get_irq *)cmd.params; cmd_params->irq_index = irq_index; err = mc_send_command(mc_io, &cmd); if (err) return err; rsp_params = (struct dprtc_rsp_get_irq_enable *)cmd.params; *en = rsp_params->en; return 0; } /** * dprtc_set_irq_mask() - Set interrupt mask. * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * @irq_index: The interrupt index to configure * @mask: Event mask to trigger interrupt; * each bit: * 0 = ignore event * 1 = consider event for asserting IRQ * * Every interrupt can have up to 32 causes and the interrupt model supports * masking/unmasking each cause independently * * Return: '0' on Success; Error code otherwise. */ int dprtc_set_irq_mask(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token, u8 irq_index, u32 mask) { struct dprtc_cmd_set_irq_mask *cmd_params; struct fsl_mc_command cmd = { 0 }; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_SET_IRQ_MASK, cmd_flags, token); cmd_params = (struct dprtc_cmd_set_irq_mask *)cmd.params; cmd_params->mask = cpu_to_le32(mask); cmd_params->irq_index = irq_index; return mc_send_command(mc_io, &cmd); } /** * dprtc_get_irq_mask() - Get interrupt mask. * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * @irq_index: The interrupt index to configure * @mask: Returned event mask to trigger interrupt * * Every interrupt can have up to 32 causes and the interrupt model supports * masking/unmasking each cause independently * * Return: '0' on Success; Error code otherwise. */ int dprtc_get_irq_mask(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token, u8 irq_index, u32 *mask) { struct dprtc_rsp_get_irq_mask *rsp_params; struct dprtc_cmd_get_irq *cmd_params; struct fsl_mc_command cmd = { 0 }; int err; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_GET_IRQ_MASK, cmd_flags, token); cmd_params = (struct dprtc_cmd_get_irq *)cmd.params; cmd_params->irq_index = irq_index; err = mc_send_command(mc_io, &cmd); if (err) return err; rsp_params = (struct dprtc_rsp_get_irq_mask *)cmd.params; *mask = le32_to_cpu(rsp_params->mask); return 0; } /** * dprtc_get_irq_status() - Get the current status of any pending interrupts. * * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * @irq_index: The interrupt index to configure * @status: Returned interrupts status - one bit per cause: * 0 = no interrupt pending * 1 = interrupt pending * * Return: '0' on Success; Error code otherwise. */ int dprtc_get_irq_status(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token, u8 irq_index, u32 *status) { struct dprtc_cmd_get_irq_status *cmd_params; struct dprtc_rsp_get_irq_status *rsp_params; struct fsl_mc_command cmd = { 0 }; int err; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_GET_IRQ_STATUS, cmd_flags, token); cmd_params = (struct dprtc_cmd_get_irq_status *)cmd.params; cmd_params->status = cpu_to_le32(*status); cmd_params->irq_index = irq_index; err = mc_send_command(mc_io, &cmd); if (err) return err; rsp_params = (struct dprtc_rsp_get_irq_status *)cmd.params; *status = le32_to_cpu(rsp_params->status); return 0; } /** * dprtc_clear_irq_status() - Clear a pending interrupt's status * * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @token: Token of DPRTC object * @irq_index: The interrupt index to configure * @status: Bits to clear (W1C) - one bit per cause: * 0 = don't change * 1 = clear status bit * * Return: '0' on Success; Error code otherwise. */ int dprtc_clear_irq_status(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token, u8 irq_index, u32 status) { struct dprtc_cmd_clear_irq_status *cmd_params; struct fsl_mc_command cmd = { 0 }; cmd.header = mc_encode_cmd_header(DPRTC_CMDID_CLEAR_IRQ_STATUS, cmd_flags, token); cmd_params = (struct dprtc_cmd_clear_irq_status *)cmd.params; cmd_params->irq_index = irq_index; cmd_params->status = cpu_to_le32(status); return mc_send_command(mc_io, &cmd); }
