1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * APM X-Gene SLIMpro MailBox Driver
18 #define MBOX_CON_NAME			"slimpro-mbox"
35  * X-Gene SlimPRO mailbox channel information
52  * X-Gene SlimPRO Mailbox controller data
54  * X-Gene SlimPRO Mailbox controller has 8 communication channels.
70 	writel(msg[1], mb_chan->reg + REG_DB_DOUT0);  in mb_chan_send_msg()
71 	writel(msg[2], mb_chan->reg + REG_DB_DOUT1);  in mb_chan_send_msg()
72 	writel(msg[0], mb_chan->reg + REG_DB_OUT);  in mb_chan_send_msg()
77 	mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0);  in mb_chan_recv_msg()
78 	mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1);  in mb_chan_recv_msg()
79 	mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN);  in mb_chan_recv_msg()
84 	u32 val = readl(mb_chan->reg + REG_DB_STAT);  in mb_chan_status_ack()
87 		writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT);  in mb_chan_status_ack()
95 	u32 val = readl(mb_chan->reg + REG_DB_STAT);  in mb_chan_status_avail()
99 		writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT);  in mb_chan_status_avail()
110 		mbox_chan_txdone(mb_chan->chan, 0);  in slimpro_mbox_irq()
113 		mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg);  in slimpro_mbox_irq()
120 	struct slimpro_mbox_chan *mb_chan = chan->con_priv;  in slimpro_mbox_send_data()
128 	struct slimpro_mbox_chan *mb_chan = chan->con_priv;  in slimpro_mbox_startup()
132 	rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0,  in slimpro_mbox_startup()
135 		dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n",  in slimpro_mbox_startup()
136 			mb_chan->irq);  in slimpro_mbox_startup()
142 	       mb_chan->reg + REG_DB_STAT);  in slimpro_mbox_startup()
144 	val = readl(mb_chan->reg + REG_DB_STATMASK);  in slimpro_mbox_startup()
146 	writel(val, mb_chan->reg + REG_DB_STATMASK);  in slimpro_mbox_startup()
153 	struct slimpro_mbox_chan *mb_chan = chan->con_priv;  in slimpro_mbox_shutdown()
157 	val = readl(mb_chan->reg + REG_DB_STATMASK);  in slimpro_mbox_shutdown()
159 	writel(val, mb_chan->reg + REG_DB_STATMASK);  in slimpro_mbox_shutdown()
161 	devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan);  in slimpro_mbox_shutdown()
177 	ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL);  in slimpro_mbox_probe()
179 		return -ENOMEM;  in slimpro_mbox_probe()
189 		ctx->mc[i].irq = platform_get_irq(pdev, i);  in slimpro_mbox_probe()
190 		if (ctx->mc[i].irq < 0) {  in slimpro_mbox_probe()
192 				dev_err(&pdev->dev, "no available IRQ\n");  in slimpro_mbox_probe()
193 				return -EINVAL;  in slimpro_mbox_probe()
195 			dev_info(&pdev->dev, "no IRQ for channel %d\n", i);  in slimpro_mbox_probe()
199 		ctx->mc[i].dev = &pdev->dev;  in slimpro_mbox_probe()
200 		ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET;  in slimpro_mbox_probe()
201 		ctx->mc[i].chan = &ctx->chans[i];  in slimpro_mbox_probe()
202 		ctx->chans[i].con_priv = &ctx->mc[i];  in slimpro_mbox_probe()
206 	ctx->mb_ctrl.dev = &pdev->dev;  in slimpro_mbox_probe()
207 	ctx->mb_ctrl.chans = ctx->chans;  in slimpro_mbox_probe()
208 	ctx->mb_ctrl.txdone_irq = true;  in slimpro_mbox_probe()
209 	ctx->mb_ctrl.ops = &slimpro_mbox_ops;  in slimpro_mbox_probe()
210 	ctx->mb_ctrl.num_chans = i;  in slimpro_mbox_probe()
212 	rc = devm_mbox_controller_register(&pdev->dev, &ctx->mb_ctrl);  in slimpro_mbox_probe()
214 		dev_err(&pdev->dev,  in slimpro_mbox_probe()
215 			"APM X-Gene SLIMpro MailBox register failed:%d\n", rc);  in slimpro_mbox_probe()
219 	dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n");  in slimpro_mbox_probe()
224 	{.compatible = "apm,xgene-slimpro-mbox" },
240 		.name = "xgene-slimpro-mbox",
259 MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver");