142 lines
4.3 KiB
C
142 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#ifndef __MTK_TINYSYS_IPI_H__
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#define __MTK_TINYSYS_IPI_H__
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#include <linux/platform_device.h>
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#include <linux/soc/mediatek/mtk-mbox.h>
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#define IPI_SEND_WAIT 0
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#define IPI_SEND_POLLING 1
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enum mtk_ipi_dev {
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IPI_DEV_SCP,
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IPI_DEV_SSPM,
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IPI_DEV_ADSP,
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IPI_DEV_MCUPM,
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IPI_DEV_CPUEB,
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IPI_DEV_APUSYS,
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IPI_DEV_GPUEB,
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IPI_DEV_VCP,
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IPI_DEV_TOTAL,
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};
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enum ipi_stage {
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SEND_MSG,
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ISR_RECV_MSGV,
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RECV_MSG,
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SEND_ACK,
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ISR_RECV_ACK,
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RECV_ACK,
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UNUSED = 0xF,
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};
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typedef int (*ipi_tx_cb_t)(void *);
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struct ipimon_s {
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unsigned short idx;
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unsigned long long ts;
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};
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/**
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* struct mtk_ipi_chan_table - channel table that belong to mtk_ipi_device
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* @ept: the rpmsg endpoint of this channel
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* @rpchan: info used to create the endpoint
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* @pin_send: the mbox send pin table address of this channel
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* @pin_recv: the mbox receive pin table address of this channel
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* @holder: keep 1 if there are ipi waiters (to wait the reply)
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* @ipi_stage: transmission stage for t0~t5 (default is 0xF)
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* @ipi_seqno: sequence count of the IPI pin processed
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* @ipi_record: timestamp of each ipi transmission stage
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*
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* All of these data should be initialized by mtk_ipi_device_register()
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*/
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struct mtk_ipi_chan_table {
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struct rpmsg_endpoint *ept;
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struct mtk_rpmsg_channel_info *rpchan;
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struct mtk_mbox_pin_send *pin_send;
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struct mtk_mbox_pin_recv *pin_recv;
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atomic_t holder;
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unsigned int ipi_stage: 4,
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ipi_seqno : 28;
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struct ipimon_s ipi_record[3];
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int trysend_count;
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int polling_count;
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};
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/**
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* struct mtk_ipi_device - device for represent the tinysys using mtk ipi
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* @name: name of tinysys device
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* @id: device id (used to match between rpmsg drivers and devices)
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* @mrpdev: mtk rpmsg channel device
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* @mbdev: mtk mbox device
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* @table: channel table with endpoint & channel_info & mbox_pin info
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* @mutex_ipi_reg: the lock must be taken when user register ipi
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* @pre_cb: the callback handler before ipi send data
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* @post_cb: the callback handler after ipi send data
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* @prdata: private data for the callback use
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* @timeout_handler: the callback for waiting reply timeout
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* @lock_monitor: the lock for dump ipi timestamp
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* @ipi_last_done: the last processed ipi transmission
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* @ipi_inited: set when mtk_ipi_device_register() done
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*
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* Tinysys platform has necessary to define the vcalue of 'name', 'id', 'mbdev';
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* and optional to define the 'pre_cb', 'post_cb', 'prdata', 'timeout_handler'.
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* Othes would be initialized by mtk_ipi_device_register().
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*/
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struct mtk_ipi_device {
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const char *name;
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int id;
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struct mtk_rpmsg_device *mrpdev;
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struct mtk_mbox_device *mbdev;
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struct mtk_ipi_chan_table *table;
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struct mutex mutex_ipi_reg;
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ipi_tx_cb_t pre_cb;
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ipi_tx_cb_t post_cb;
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void *prdata;
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void (*timeout_handler)(int id);
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spinlock_t lock_monitor;
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int ipi_last_done;
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int ipi_inited;
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};
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#define IPI_ACTION_DONE 0
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#define IPI_DEV_ILLEGAL -1 /* ipi device is not initial */
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#define IPI_DUPLEX -2 /* the ipi has be registered */
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#define IPI_UNAVAILABLE -3 /* can't find this ipi pin define */
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#define IPI_NO_MSGBUF -4 /* receiver doesn't has message buffer */
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#define IPI_NO_MEMORY -5 /* message length is large than defined */
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#define IPI_PIN_BUSY -6 /* send message timeout */
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#define IPI_COMPL_TIMEOUT -7 /* polling or wait for ack ipi timeout */
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#define IPI_PRE_CB_FAIL -8 /* pre-callback fail */
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#define IPI_POST_CB_FAIL -9 /* post-callback fail */
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#define IPI_RPMSG_ERR -99 /* some error from rpmsg layer */
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int mtk_ipi_device_register(struct mtk_ipi_device *ipidev,
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struct platform_device *pdev, struct mtk_mbox_device *mbox,
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unsigned int ipi_chan_count);
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int mtk_ipi_device_reset(struct mtk_ipi_device *ipidev);
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int mtk_ipi_register(struct mtk_ipi_device *ipidev, int ipi_id,
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mbox_pin_cb_t cb, void *prdata, void *msg);
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int mtk_ipi_unregister(struct mtk_ipi_device *ipidev, int ipi_id);
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int mtk_ipi_send(struct mtk_ipi_device *ipidev, int ipi_id,
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int opt, void *data, int len, int retry_timeout);
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int mtk_ipi_send_compl(struct mtk_ipi_device *ipidev, int ipi_id,
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int opt, void *data, int len, unsigned long timeout);
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int mtk_ipi_recv(struct mtk_ipi_device *ipidev, int ipi_id);
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int mtk_ipi_recv_reply(struct mtk_ipi_device *ipidev, int ipi_id,
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void *reply_data, int len);
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void ipi_monitor_dump(struct mtk_ipi_device *ipidev);
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void mtk_ipi_tracking(struct mtk_ipi_device *ipidev, bool en);
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#endif
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