321 lines
9 KiB
C
321 lines
9 KiB
C
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/* 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_MBOX_H__
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#define __MTK_MBOX_H__
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#include <linux/platform_device.h>
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#include <linux/completion.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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/*
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* mbox slot size definition
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* 1 slot for 4 bytes
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*/
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#define MBOX_SLOT_SIZE 4
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struct mtk_mbox_pin_send;
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struct mtk_mbox_pin_recv;
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typedef int (*mbox_rx_cb_t)(void *);
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typedef int (*mbox_pin_cb_t)(unsigned int ipi_id, void *prdata, void *data,
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unsigned int len);
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typedef void (*mbox_ipi_cb_t)(struct mtk_mbox_pin_recv *, void *);
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/*
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* mbox receive information
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*
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* poll_count :mbox polling success count
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* recv_irq_count :mbox receive irq count
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* notify_count :mbox irq notify count
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* cb_count :mbox execute callback function count
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* pre_timestamp :time stamp before callback function
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* post_timestamp :time stamp after callback function
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*/
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struct mtk_mbox_recv_record {
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uint32_t poll_count;
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uint32_t recv_irq_count;
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uint32_t notify_count;
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uint32_t cb_count;
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uint64_t pre_timestamp;
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uint64_t post_timestamp;
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};
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/*
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* mbox send information
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*
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*/
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struct mtk_mbox_send_record {
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};
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/*
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* mbox record information
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*
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* write_count :mbox write success count
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* busy_count :mbox read success count
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* trig_irq_count :mbox trigger irq success count
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*/
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struct mtk_mbox_record {
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uint32_t write_count;
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uint32_t busy_count;
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uint32_t trig_irq_count;
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};
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/*
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* mbox pin structure, this is for send definition,
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* ipi=endpoint=pin
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* mbox : (mbox number)mbox number of the pin, up to 16(plt)
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* offset : (slot)msg offset in share memory, up to 1024*4 KB(plt)
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* send_opt : (opt)send opt, 0:send ,1: send for response(plt)
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* lock : (lock)polling lock 0:unuse,1:used
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* msg_size : (slot)message size in words, 4 bytes alignment(plt)
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* pin_index : (bit offset)pin index in the mbox(plt)
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* chan_id : (u32) ipc channel id(plt)
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* mutex : (mutex)mutex for remote response
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* completion : (completion)completion for remote response
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* pin_lock : (spinlock_t)lock of the pin
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* send_record: send pin record information
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*/
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struct mtk_mbox_pin_send {
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unsigned int mbox : 4,
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offset : 20,
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send_opt : 2,
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lock : 2;
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unsigned int msg_size;
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unsigned int pin_index;
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unsigned int chan_id;
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struct mutex mutex_send;
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struct completion comp_ack; // to remove
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spinlock_t pin_lock;
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struct mtk_mbox_send_record send_record;
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};
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/*
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* mbox pin structure, this is for receive definition,
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* ipi=endpoint=pin
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* mbox : (mbox number)mbox number of the pin, up to 16(plt)
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* offset : (slot)msg offset in share memory, up to 1024*4 KB(plt)
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* recv_opt : (opt)recv option, 0:receive ,1: response(plt)
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* lock : (lock)polling lock 0:unuse,1:used
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* buf_full_opt : (opt)buffer option 0:drop, 1:assert, 2:overwrite(plt)
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* cb_ctx_opt : (opt)callback option 0:isr context, 1:process context(plt)
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* msg_size : (slot)msg used slots in the mbox, 4 bytes alignment(plt)
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* pin_index : (bit offset)pin index in the mbox(plt)
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* chan_id : (u32) ipc channel id(plt)
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* notify : (completion)notify process
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* mbox_pin_cb: (cb)cb function
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* pin_buf : (void*)buffer point
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* prdata : (void*)private data
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* pin_lock: (spinlock_t)lock of the pin
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* recv_record: receive pin record information
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*/
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struct mtk_mbox_pin_recv {
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unsigned int mbox : 4,
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offset : 20,
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recv_opt : 2,
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lock : 2,
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buf_full_opt : 2,
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cb_ctx_opt : 2;
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unsigned int msg_size;
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unsigned int pin_index;
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unsigned int chan_id;
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struct completion notify;
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mbox_pin_cb_t mbox_pin_cb;
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void *pin_buf;
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void *prdata;
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spinlock_t pin_lock;
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struct mtk_mbox_recv_record recv_record;
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};
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/*
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* mtk mbox device,Mbox is a dedicate hardware of a tinysys consists of:
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* 1) a share memory tightly coupled to the tinysys
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* 2) several IRQs
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*
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* @ipi_cb: the callback handler for synchronization layer
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* @ipi_priv: private data for synchronization layer
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* @pre_cb: the callback handler in the begin of mbox receiving ipi
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* @post_cb: the callback handler in the end of mbox receiving ipi
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* @prdata: private data for the callback use
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*/
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struct mtk_mbox_device {
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/* Identity of the device */
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const char *name;
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unsigned int id;
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/* Following are platform specific interface*/
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struct mtk_mbox_pin_recv *pin_recv_table;
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struct mtk_mbox_pin_send *pin_send_table;
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struct mtk_mbox_info *info_table;
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unsigned int count;
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unsigned int recv_count;
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unsigned int send_count;
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void (*memcpy_to_tiny)(void __iomem *dest, const void *src, int size);
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void (*memcpy_from_tiny)(void *dest, const void __iomem *src, int size);
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mbox_ipi_cb_t ipi_cb;
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void *ipi_priv;
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mbox_rx_cb_t pre_cb;
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mbox_rx_cb_t post_cb;
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void *prdata;
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bool log_enable;
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};
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/*
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* mbox callback function context definition
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* 0: isr context, 1:process context
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*/
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enum MBOX_PIN_CTX {
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MBOX_CB_IN_ISR = 0,
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MBOX_CB_IN_PROCESS = 1,
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};
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/*
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* mbox buffer full action definition
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* 0:drop, 1:assert, 2:overwrite
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*/
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enum MBOX_BUF_OPT {
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MBOX_BUF_FULL_DROP = 0,
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MBOX_BUF_FULL_ASSERT = 1,
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MBOX_BUF_FULL_OVERWRITE = 2,
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MBOX_BUF_COPY_DONE = 3,
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MBOX_BUF_FULL_RET = 4,
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};
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/*
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* mbox recv action definition
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* 0:receive message, 1:receive ack
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*/
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enum MBOX_RECV_OPT {
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MBOX_RECV_MESSAGE = 0,
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MBOX_RECV_ACK = 1,
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};
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/*
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* mbox information
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*
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* mbdev :mbox device
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* irq_num:identity of mbox irq
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* id :mbox id
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* slot :how many slots that mbox used
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* opt :option for tx mode, 0:mbox, 1:share memory 2:queue
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* enable :mbox status, 0:disable, 1: enable
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* is64d :mbox is64d status, 0:32d, 1: 64d
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* base :mbox base address
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* set_irq_reg :mbox set irq register
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* clr_irq_reg :mbox clear irq register
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* init_base_reg:mbox initialize register
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* mbox lock :lock of mbox
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* record :mbox record information
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*/
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struct mtk_mbox_info {
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struct mtk_mbox_device *mbdev;
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int irq_num;
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unsigned int id;
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unsigned int slot;
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unsigned int opt;
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bool enable;
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bool is64d;
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void __iomem *base;
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void __iomem *set_irq_reg;
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void __iomem *clr_irq_reg;
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void __iomem *init_base_reg;
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void __iomem *send_status_reg;
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void __iomem *recv_status_reg;
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spinlock_t mbox_lock;
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struct mtk_mbox_record record;
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};
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/*
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* mbox return value definition
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*/
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enum MBOX_RETURN {
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MBOX_POST_CB_ERR = -8,
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MBOX_PRE_CB_ERR = -7,
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MBOX_READ_SZ_ERR = -6,
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MBOX_WRITE_SZ_ERR = -5,
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MBOX_PARA_ERR = -4,
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MBOX_CONFIG_ERR = -3,
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MBOX_IRQ_ERR = -2,
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MBOX_PLT_ERR = -1,
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MBOX_DONE = 0,
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MBOX_PIN_BUSY = 1,
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};
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/*
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* mbox message options
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* 0: mbox
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* 1: share memory
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* 2: mbox with queue
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* 3: share memory with queue
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*/
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enum {
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MBOX_OPT_DIRECT = 0,
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MBOX_OPT_SMEM = 1,
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MBOX_OPT_QUEUE_DIR = 2,
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MBOX_OPT_QUEUE_SMEM = 3,
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};
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/*
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* mtk ipi message header
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*
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* id :message id
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* len :data length in byte
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* options :options
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* reserved :reserved
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*/
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struct mtk_ipi_msg_hd {
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uint32_t id;
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uint32_t len;
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uint32_t options;
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uint32_t reserved;
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};
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struct mtk_ipi_msg {
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struct mtk_ipi_msg_hd ipihd;
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void *data;
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};
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int mtk_mbox_write_hd(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int slot, void *msg);
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int mtk_mbox_read_hd(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int slot, void *dest);
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int mtk_mbox_write(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int slot, void *data, unsigned int len);
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int mtk_mbox_read(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int slot, void *data, unsigned int len);
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int mtk_mbox_clr_irq(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int irq);
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int mtk_mbox_trigger_irq(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int irq);
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unsigned int mtk_mbox_read_recv_irq(struct mtk_mbox_device *mbdev,
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unsigned int mbox);
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int mtk_mbox_set_base_addr(struct mtk_mbox_device *mbdev, unsigned int mbox,
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unsigned int addr);
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unsigned int mtk_mbox_check_send_irq(struct mtk_mbox_device *mbdev,
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unsigned int mbox, unsigned int pin_index);
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int mtk_mbox_probe(struct platform_device *pdev, struct mtk_mbox_device *mbdev,
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unsigned int mbox);
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int mtk_mbox_scp_probe(struct platform_device *pdev, struct mtk_mbox_device *mbdev,
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unsigned int mbox);
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int mtk_mbox_cb_register(struct mtk_mbox_device *mbdev, unsigned int pin_offset,
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mbox_pin_cb_t mbox_pin_cb, void *prdata);
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int mtk_mbox_polling(struct mtk_mbox_device *mbdev, unsigned int mbox,
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void *data, struct mtk_mbox_pin_recv *pin_recv);
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int mtk_smem_init(struct platform_device *pdev, struct mtk_mbox_device *mbdev,
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unsigned int mbox, void __iomem *base,
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void __iomem *set_irq_reg, void __iomem *clr_irq_reg,
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void __iomem *send_status_reg, void __iomem *recv_status_reg);
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void mtk_mbox_dump_all(struct mtk_mbox_device *mbdev);
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void mtk_mbox_dump_recv(struct mtk_mbox_device *mbdev, unsigned int pin);
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void mtk_mbox_dump_recv_pin(struct mtk_mbox_device *mbdev,
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struct mtk_mbox_pin_recv *pin_recv);
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void mtk_mbox_dump_send(struct mtk_mbox_device *mbdev, unsigned int pin);
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void mtk_mbox_dump(struct mtk_mbox_device *mbdev, unsigned int mbox);
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int mtk_mbox_log_enable(struct mtk_mbox_device *mbdev, bool enable);
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void mtk_mbox_reset_record(struct mtk_mbox_device *mbdev);
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#endif
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