1 // SPDX-License-Identifier: GPL-2.0-only
30 	struct mbox_controller mbox;  member
39 	return chan - chan->mbox->chans;  in ch_num()
44 	return !(readl(mb->tx_regs + IPCR_STATUS) & BIT(idx));  in ast2700_mbox_tx_done()
51 	int num_words = mb->msg_size / sizeof(u32);  in ast2700_mbox_irq()
57 	status = readl(mb->rx_regs + IPCR_ENABLE) &  in ast2700_mbox_irq()
58 		 readl(mb->rx_regs + IPCR_STATUS);  in ast2700_mbox_irq()
63 	for (n = 0; n < mb->mbox.num_chans; ++n) {  in ast2700_mbox_irq()
64 		struct mbox_chan *chan = &mb->mbox.chans[n];  in ast2700_mbox_irq()
69 		data_reg = mb->rx_regs + IPCR_DATA + mb->msg_size * n;  in ast2700_mbox_irq()
70 		word_data = chan->con_priv;  in ast2700_mbox_irq()
75 		mbox_chan_received_data(chan, chan->con_priv);  in ast2700_mbox_irq()
78 		writel(RX_IRQ(n), mb->rx_regs + IPCR_STATUS);  in ast2700_mbox_irq()
86 	struct ast2700_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in ast2700_mbox_send_data()
88 	void __iomem *data_reg = mb->tx_regs + IPCR_DATA + mb->msg_size * idx;  in ast2700_mbox_send_data()
90 	int num_words = mb->msg_size / sizeof(u32);  in ast2700_mbox_send_data()
93 	if (!(readl(mb->tx_regs + IPCR_ENABLE) & BIT(idx))) {  in ast2700_mbox_send_data()
94 		dev_warn(mb->mbox.dev, "%s: Ch-%d not enabled yet\n", __func__, idx);  in ast2700_mbox_send_data()
95 		return -ENODEV;  in ast2700_mbox_send_data()
99 		dev_warn(mb->mbox.dev, "%s: Ch-%d last data has not finished\n", __func__, idx);  in ast2700_mbox_send_data()
100 		return -EBUSY;  in ast2700_mbox_send_data()
107 	writel(BIT(idx), mb->tx_regs + IPCR_TX_TRIG);  in ast2700_mbox_send_data()
108 	dev_dbg(mb->mbox.dev, "%s: Ch-%d sent\n", __func__, idx);  in ast2700_mbox_send_data()
115 	struct ast2700_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in ast2700_mbox_startup()
117 	void __iomem *reg = mb->rx_regs + IPCR_ENABLE;  in ast2700_mbox_startup()
120 	spin_lock_irqsave(&mb->lock, flags);  in ast2700_mbox_startup()
122 	spin_unlock_irqrestore(&mb->lock, flags);  in ast2700_mbox_startup()
129 	struct ast2700_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in ast2700_mbox_shutdown()
131 	void __iomem *reg = mb->rx_regs + IPCR_ENABLE;  in ast2700_mbox_shutdown()
134 	spin_lock_irqsave(&mb->lock, flags);  in ast2700_mbox_shutdown()
136 	spin_unlock_irqrestore(&mb->lock, flags);  in ast2700_mbox_shutdown()
141 	struct ast2700_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in ast2700_mbox_last_tx_done()
158 	struct device *dev = &pdev->dev;  in ast2700_mbox_probe()
161 	if (!pdev->dev.of_node)  in ast2700_mbox_probe()
162 		return -ENODEV;  in ast2700_mbox_probe()
164 	dev_data = device_get_match_data(&pdev->dev);  in ast2700_mbox_probe()
168 		return -ENOMEM;  in ast2700_mbox_probe()
170 	mb->mbox.chans = devm_kcalloc(&pdev->dev, dev_data->num_chans,  in ast2700_mbox_probe()
171 				      sizeof(*mb->mbox.chans), GFP_KERNEL);  in ast2700_mbox_probe()
172 	if (!mb->mbox.chans)  in ast2700_mbox_probe()
173 		return -ENOMEM;  in ast2700_mbox_probe()
176 	for (int i = 0; i < dev_data->num_chans; i++) {  in ast2700_mbox_probe()
177 		mb->mbox.chans[i].con_priv = devm_kcalloc(dev, dev_data->msg_size,  in ast2700_mbox_probe()
179 		if (!mb->mbox.chans[i].con_priv)  in ast2700_mbox_probe()
180 			return -ENOMEM;  in ast2700_mbox_probe()
185 	mb->tx_regs = devm_platform_ioremap_resource_byname(pdev, "tx");  in ast2700_mbox_probe()
186 	if (IS_ERR(mb->tx_regs))  in ast2700_mbox_probe()
187 		return PTR_ERR(mb->tx_regs);  in ast2700_mbox_probe()
189 	mb->rx_regs = devm_platform_ioremap_resource_byname(pdev, "rx");  in ast2700_mbox_probe()
190 	if (IS_ERR(mb->rx_regs))  in ast2700_mbox_probe()
191 		return PTR_ERR(mb->rx_regs);  in ast2700_mbox_probe()
193 	mb->msg_size = dev_data->msg_size;  in ast2700_mbox_probe()
194 	mb->mbox.dev = dev;  in ast2700_mbox_probe()
195 	mb->mbox.num_chans = dev_data->num_chans;  in ast2700_mbox_probe()
196 	mb->mbox.ops = &ast2700_mbox_chan_ops;  in ast2700_mbox_probe()
197 	mb->mbox.txdone_irq = false;  in ast2700_mbox_probe()
198 	mb->mbox.txdone_poll = true;  in ast2700_mbox_probe()
199 	mb->mbox.txpoll_period = 5;  in ast2700_mbox_probe()
200 	spin_lock_init(&mb->lock);  in ast2700_mbox_probe()
210 	return devm_mbox_controller_register(dev, &mb->mbox);  in ast2700_mbox_probe()
219 	{ .compatible = "aspeed,ast2700-mailbox", .data = &ast2700_dev_data },
226 		.name = "ast2700-mailbox",