// SPDX-License-Identifier: GPL-2.0-only /* * Spreadtrum mailbox driver * * Copyright (c) 2020 Spreadtrum Communications Inc. */ #include <linux/delay.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/mailbox_controller.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/clk.h> #define SPRD_MBOX_ID … #define SPRD_MBOX_MSG_LOW … #define SPRD_MBOX_MSG_HIGH … #define SPRD_MBOX_TRIGGER … #define SPRD_MBOX_FIFO_RST … #define SPRD_MBOX_FIFO_STS … #define SPRD_MBOX_IRQ_STS … #define SPRD_MBOX_IRQ_MSK … #define SPRD_MBOX_LOCK … #define SPRD_MBOX_FIFO_DEPTH … /* Bit and mask definition for inbox's SPRD_MBOX_FIFO_STS register */ #define SPRD_INBOX_FIFO_DELIVER_MASK … #define SPRD_INBOX_FIFO_OVERLOW_MASK … #define SPRD_INBOX_FIFO_DELIVER_SHIFT … #define SPRD_INBOX_FIFO_BUSY_MASK … /* Bit and mask definition for SPRD_MBOX_IRQ_STS register */ #define SPRD_MBOX_IRQ_CLR … /* Bit and mask definition for outbox's SPRD_MBOX_FIFO_STS register */ #define SPRD_OUTBOX_FIFO_FULL … #define SPRD_OUTBOX_FIFO_WR_SHIFT … #define SPRD_OUTBOX_FIFO_RD_SHIFT … #define SPRD_OUTBOX_FIFO_POS_MASK … /* Bit and mask definition for inbox's SPRD_MBOX_IRQ_MSK register */ #define SPRD_INBOX_FIFO_BLOCK_IRQ … #define SPRD_INBOX_FIFO_OVERFLOW_IRQ … #define SPRD_INBOX_FIFO_DELIVER_IRQ … #define SPRD_INBOX_FIFO_IRQ_MASK … /* Bit and mask definition for outbox's SPRD_MBOX_IRQ_MSK register */ #define SPRD_OUTBOX_FIFO_NOT_EMPTY_IRQ … #define SPRD_OUTBOX_FIFO_IRQ_MASK … #define SPRD_OUTBOX_BASE_SPAN … #define SPRD_MBOX_CHAN_MAX … #define SPRD_SUPP_INBOX_ID_SC9863A … struct sprd_mbox_priv { … }; static struct sprd_mbox_priv *to_sprd_mbox_priv(struct mbox_controller *mbox) { … } static u32 sprd_mbox_get_fifo_len(struct sprd_mbox_priv *priv, u32 fifo_sts) { … } static irqreturn_t do_outbox_isr(void __iomem *base, struct sprd_mbox_priv *priv) { … } static irqreturn_t sprd_mbox_outbox_isr(int irq, void *data) { … } static irqreturn_t sprd_mbox_supp_isr(int irq, void *data) { … } static irqreturn_t sprd_mbox_inbox_isr(int irq, void *data) { … } static int sprd_mbox_send_data(struct mbox_chan *chan, void *msg) { … } static int sprd_mbox_flush(struct mbox_chan *chan, unsigned long timeout) { … } static int sprd_mbox_startup(struct mbox_chan *chan) { … } static void sprd_mbox_shutdown(struct mbox_chan *chan) { … } static const struct mbox_chan_ops sprd_mbox_ops = …; static void sprd_mbox_disable(void *data) { … } static int sprd_mbox_probe(struct platform_device *pdev) { … } static const struct of_device_id sprd_mbox_of_match[] = …; MODULE_DEVICE_TABLE(of, sprd_mbox_of_match); static struct platform_driver sprd_mbox_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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