// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017-2018 HiSilicon Limited. // Copyright (c) 2017-2018 Linaro Limited. #include <linux/bitops.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/mailbox_controller.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/slab.h> #include "mailbox.h" #define MBOX_CHAN_MAX … #define MBOX_RX … #define MBOX_TX … #define MBOX_BASE(mbox, ch) … #define MBOX_SRC_REG … #define MBOX_DST_REG … #define MBOX_DCLR_REG … #define MBOX_DSTAT_REG … #define MBOX_MODE_REG … #define MBOX_IMASK_REG … #define MBOX_ICLR_REG … #define MBOX_SEND_REG … #define MBOX_DATA_REG … #define MBOX_IPC_LOCK_REG … #define MBOX_IPC_UNLOCK … #define MBOX_AUTOMATIC_ACK … #define MBOX_STATE_IDLE … #define MBOX_STATE_READY … #define MBOX_STATE_ACK … #define MBOX_MSG_LEN … /** * struct hi3660_chan_info - Hi3660 mailbox channel information * @dst_irq: Interrupt vector for remote processor * @ack_irq: Interrupt vector for local processor * * A channel can be used for TX or RX, it can trigger remote * processor interrupt to notify remote processor and can receive * interrupt if it has an incoming message. */ struct hi3660_chan_info { … }; /** * struct hi3660_mbox - Hi3660 mailbox controller data * @dev: Device to which it is attached * @base: Base address of the register mapping region * @chan: Representation of channels in mailbox controller * @mchan: Representation of channel info * @controller: Representation of a communication channel controller * * Mailbox controller includes 32 channels and can allocate * channel for message transferring. */ struct hi3660_mbox { … }; static struct hi3660_mbox *to_hi3660_mbox(struct mbox_controller *mbox) { … } static int hi3660_mbox_check_state(struct mbox_chan *chan) { … } static int hi3660_mbox_unlock(struct mbox_chan *chan) { … } static int hi3660_mbox_acquire_channel(struct mbox_chan *chan) { … } static int hi3660_mbox_startup(struct mbox_chan *chan) { … } static int hi3660_mbox_send_data(struct mbox_chan *chan, void *msg) { … } static const struct mbox_chan_ops hi3660_mbox_ops = …; static struct mbox_chan *hi3660_mbox_xlate(struct mbox_controller *controller, const struct of_phandle_args *spec) { … } static const struct of_device_id hi3660_mbox_of_match[] = …; MODULE_DEVICE_TABLE(of, hi3660_mbox_of_match); static int hi3660_mbox_probe(struct platform_device *pdev) { … } static struct platform_driver hi3660_mbox_driver = …; static int __init hi3660_mbox_init(void) { … } core_initcall(hi3660_mbox_init); static void __exit hi3660_mbox_exit(void) { … } module_exit(hi3660_mbox_exit); MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …;
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