1 // SPDX-License-Identifier: GPL-2.0-only
6  * Copyright (C) 2013-2015 Fujitsu Semiconductor Ltd.
49 	struct platform_mhu_link *mlink = chan->con_priv;  in platform_mhu_rx_interrupt()
52 	val = readl_relaxed(mlink->rx_reg + INTR_STAT_OFS);  in platform_mhu_rx_interrupt()
58 	writel_relaxed(val, mlink->rx_reg + INTR_CLR_OFS);  in platform_mhu_rx_interrupt()
65 	struct platform_mhu_link *mlink = chan->con_priv;  in platform_mhu_last_tx_done()
66 	u32 val = readl_relaxed(mlink->tx_reg + INTR_STAT_OFS);  in platform_mhu_last_tx_done()
73 	struct platform_mhu_link *mlink = chan->con_priv;  in platform_mhu_send_data()
76 	writel_relaxed(*arg, mlink->tx_reg + INTR_SET_OFS);  in platform_mhu_send_data()
83 	struct platform_mhu_link *mlink = chan->con_priv;  in platform_mhu_startup()
87 	val = readl_relaxed(mlink->tx_reg + INTR_STAT_OFS);  in platform_mhu_startup()
88 	writel_relaxed(val, mlink->tx_reg + INTR_CLR_OFS);  in platform_mhu_startup()
90 	ret = request_irq(mlink->irq, platform_mhu_rx_interrupt,  in platform_mhu_startup()
93 		dev_err(chan->mbox->dev,  in platform_mhu_startup()
94 			"Unable to acquire IRQ %d\n", mlink->irq);  in platform_mhu_startup()
103 	struct platform_mhu_link *mlink = chan->con_priv;  in platform_mhu_shutdown()
105 	free_irq(mlink->irq, chan);  in platform_mhu_shutdown()
118 	struct platform_mhu *mhu;  in platform_mhu_probe()  local
119 	struct device *dev = &pdev->dev;  in platform_mhu_probe()
126 	mhu = devm_kzalloc(dev, sizeof(*mhu), GFP_KERNEL);  in platform_mhu_probe()
127 	if (!mhu)  in platform_mhu_probe()
128 		return -ENOMEM;  in platform_mhu_probe()
131 	mhu->base = devm_ioremap_resource(dev, res);  in platform_mhu_probe()
132 	if (IS_ERR(mhu->base)) {  in platform_mhu_probe()
134 		return PTR_ERR(mhu->base);  in platform_mhu_probe()
138 		mhu->chan[i].con_priv = &mhu->mlink[i];  in platform_mhu_probe()
139 		mhu->mlink[i].irq = platform_get_irq(pdev, i);  in platform_mhu_probe()
140 		if (mhu->mlink[i].irq < 0) {  in platform_mhu_probe()
142 			return mhu->mlink[i].irq;  in platform_mhu_probe()
144 		mhu->mlink[i].rx_reg = mhu->base + platform_mhu_reg[i];  in platform_mhu_probe()
145 		mhu->mlink[i].tx_reg = mhu->mlink[i].rx_reg + TX_REG_OFFSET;  in platform_mhu_probe()
148 	mhu->mbox.dev = dev;  in platform_mhu_probe()
149 	mhu->mbox.chans = &mhu->chan[0];  in platform_mhu_probe()
150 	mhu->mbox.num_chans = MHU_CHANS;  in platform_mhu_probe()
151 	mhu->mbox.ops = &platform_mhu_ops;  in platform_mhu_probe()
152 	mhu->mbox.txdone_irq = false;  in platform_mhu_probe()
153 	mhu->mbox.txdone_poll = true;  in platform_mhu_probe()
154 	mhu->mbox.txpoll_period = 1;  in platform_mhu_probe()
156 	platform_set_drvdata(pdev, mhu);  in platform_mhu_probe()
158 	err = devm_mbox_controller_register(dev, &mhu->mbox);  in platform_mhu_probe()
164 	dev_info(dev, "Platform MHU Mailbox registered\n");  in platform_mhu_probe()
169 	{ .compatible = "amlogic,meson-gxbb-mhu", },
177 		.name = "platform-mhu",
185 MODULE_ALIAS("platform:platform-mhu");
186 MODULE_DESCRIPTION("Platform MHU Driver");