1 // SPDX-License-Identifier: GPL-2.0-only
42 	struct mbox_controller mbox;  member
54 	struct rockchip_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in rockchip_mbox_send_data()
56 	struct rockchip_mbox_chan *chans = mb->chans;  in rockchip_mbox_send_data()
59 		return -EINVAL;  in rockchip_mbox_send_data()
61 	if (msg->rx_size > mb->buf_size) {  in rockchip_mbox_send_data()
62 		dev_err(mb->mbox.dev, "Transmit size over buf size(%d)\n",  in rockchip_mbox_send_data()
63 			mb->buf_size);  in rockchip_mbox_send_data()
64 		return -EINVAL;  in rockchip_mbox_send_data()
67 	dev_dbg(mb->mbox.dev, "Chan[%d]: A2B message, cmd 0x%08x\n",  in rockchip_mbox_send_data()
68 		chans->idx, msg->cmd);  in rockchip_mbox_send_data()
70 	mb->chans[chans->idx].msg = msg;  in rockchip_mbox_send_data()
72 	writel_relaxed(msg->cmd, mb->mbox_base + MAILBOX_A2B_CMD(chans->idx));  in rockchip_mbox_send_data()
73 	writel_relaxed(msg->rx_size, mb->mbox_base +  in rockchip_mbox_send_data()
74 		       MAILBOX_A2B_DAT(chans->idx));  in rockchip_mbox_send_data()
81 	struct rockchip_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in rockchip_mbox_startup()
84 	writel_relaxed((1 << mb->mbox.num_chans) - 1,  in rockchip_mbox_startup()
85 		       mb->mbox_base + MAILBOX_B2A_INTEN);  in rockchip_mbox_startup()
92 	struct rockchip_mbox *mb = dev_get_drvdata(chan->mbox->dev);  in rockchip_mbox_shutdown()
93 	struct rockchip_mbox_chan *chans = mb->chans;  in rockchip_mbox_shutdown()
96 	writel_relaxed(0, mb->mbox_base + MAILBOX_B2A_INTEN);  in rockchip_mbox_shutdown()
98 	mb->chans[chans->idx].msg = NULL;  in rockchip_mbox_shutdown()
111 	u32 status = readl_relaxed(mb->mbox_base + MAILBOX_B2A_STATUS);  in rockchip_mbox_irq()
113 	for (idx = 0; idx < mb->mbox.num_chans; idx++) {  in rockchip_mbox_irq()
114 		if ((status & (1 << idx)) && (irq == mb->chans[idx].irq)) {  in rockchip_mbox_irq()
115 			/* Clear mbox interrupt */  in rockchip_mbox_irq()
117 				       mb->mbox_base + MAILBOX_B2A_STATUS);  in rockchip_mbox_irq()
131 	for (idx = 0; idx < mb->mbox.num_chans; idx++) {  in rockchip_mbox_isr()
132 		if (irq != mb->chans[idx].irq)  in rockchip_mbox_isr()
135 		msg = mb->chans[idx].msg;  in rockchip_mbox_isr()
137 			dev_err(mb->mbox.dev,  in rockchip_mbox_isr()
142 		mbox_chan_received_data(&mb->mbox.chans[idx], msg);  in rockchip_mbox_isr()
143 		mb->chans[idx].msg = NULL;  in rockchip_mbox_isr()
145 		dev_dbg(mb->mbox.dev, "Chan[%d]: B2A message, cmd 0x%08x\n",  in rockchip_mbox_isr()
146 			idx, msg->cmd);  in rockchip_mbox_isr()
159 	{ .compatible = "rockchip,rk3368-mailbox", .data = &rk3368_drv_data},
171 	if (!pdev->dev.of_node)  in rockchip_mbox_probe()
172 		return -ENODEV;  in rockchip_mbox_probe()
174 	drv_data = (const struct rockchip_mbox_data *) device_get_match_data(&pdev->dev);  in rockchip_mbox_probe()
176 	mb = devm_kzalloc(&pdev->dev, sizeof(*mb), GFP_KERNEL);  in rockchip_mbox_probe()
178 		return -ENOMEM;  in rockchip_mbox_probe()
180 	mb->chans = devm_kcalloc(&pdev->dev, drv_data->num_chans,  in rockchip_mbox_probe()
181 				 sizeof(*mb->chans), GFP_KERNEL);  in rockchip_mbox_probe()
182 	if (!mb->chans)  in rockchip_mbox_probe()
183 		return -ENOMEM;  in rockchip_mbox_probe()
185 	mb->mbox.chans = devm_kcalloc(&pdev->dev, drv_data->num_chans,  in rockchip_mbox_probe()
186 				      sizeof(*mb->mbox.chans), GFP_KERNEL);  in rockchip_mbox_probe()
187 	if (!mb->mbox.chans)  in rockchip_mbox_probe()
188 		return -ENOMEM;  in rockchip_mbox_probe()
192 	mb->mbox.dev = &pdev->dev;  in rockchip_mbox_probe()
193 	mb->mbox.num_chans = drv_data->num_chans;  in rockchip_mbox_probe()
194 	mb->mbox.ops = &rockchip_mbox_chan_ops;  in rockchip_mbox_probe()
195 	mb->mbox.txdone_irq = true;  in rockchip_mbox_probe()
197 	mb->mbox_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in rockchip_mbox_probe()
198 	if (IS_ERR(mb->mbox_base))  in rockchip_mbox_probe()
199 		return PTR_ERR(mb->mbox_base);  in rockchip_mbox_probe()
202 	mb->buf_size = (size_t)resource_size(res) / (drv_data->num_chans * 2);  in rockchip_mbox_probe()
204 	mb->pclk = devm_clk_get(&pdev->dev, "pclk_mailbox");  in rockchip_mbox_probe()
205 	if (IS_ERR(mb->pclk)) {  in rockchip_mbox_probe()
206 		ret = PTR_ERR(mb->pclk);  in rockchip_mbox_probe()
207 		dev_err(&pdev->dev, "failed to get pclk_mailbox clock: %d\n",  in rockchip_mbox_probe()
212 	ret = clk_prepare_enable(mb->pclk);  in rockchip_mbox_probe()
214 		dev_err(&pdev->dev, "failed to enable pclk: %d\n", ret);  in rockchip_mbox_probe()
218 	for (i = 0; i < mb->mbox.num_chans; i++) {  in rockchip_mbox_probe()
223 		ret = devm_request_threaded_irq(&pdev->dev, irq,  in rockchip_mbox_probe()
226 						dev_name(&pdev->dev), mb);  in rockchip_mbox_probe()
230 		mb->chans[i].idx = i;  in rockchip_mbox_probe()
231 		mb->chans[i].irq = irq;  in rockchip_mbox_probe()
232 		mb->chans[i].mb = mb;  in rockchip_mbox_probe()
233 		mb->chans[i].msg = NULL;  in rockchip_mbox_probe()
236 	ret = devm_mbox_controller_register(&pdev->dev, &mb->mbox);  in rockchip_mbox_probe()
238 		dev_err(&pdev->dev, "Failed to register mailbox: %d\n", ret);  in rockchip_mbox_probe()
246 		.name = "rockchip-mailbox",
254 MODULE_AUTHOR("Addy Ke <addy.ke@rock-chips.com>");
255 MODULE_AUTHOR("Caesar Wang <wxt@rock-chips.com>");