78 static bool mpfs_mbox_busy(struct mpfs_mbox *mbox)  in mpfs_mbox_busy()  argument
82 	if (mbox->control_scb)  in mpfs_mbox_busy()
83 		regmap_read(mbox->control_scb, SERVICES_SR_OFFSET, &status);  in mpfs_mbox_busy()
85 		status = readl_relaxed(mbox->ctrl_base + SERVICES_SR_OFFSET);  in mpfs_mbox_busy()
92 	struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv;  in mpfs_mbox_last_tx_done()  local
93 	struct mpfs_mss_response *response = mbox->response;  in mpfs_mbox_last_tx_done()
96 	if (mpfs_mbox_busy(mbox))  in mpfs_mbox_last_tx_done()
105 	if (mbox->control_scb)  in mpfs_mbox_last_tx_done()
106 		regmap_read(mbox->control_scb, SERVICES_SR_OFFSET, &val);  in mpfs_mbox_last_tx_done()
108 		val = readl_relaxed(mbox->ctrl_base + SERVICES_SR_OFFSET);  in mpfs_mbox_last_tx_done()
117 	struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv;  in mpfs_mbox_send_data()  local
123 	mbox->response = msg->response;  in mpfs_mbox_send_data()
124 	mbox->resp_offset = msg->resp_offset;  in mpfs_mbox_send_data()
126 	if (mpfs_mbox_busy(mbox))  in mpfs_mbox_send_data()
136 				       mbox->mbox_base + msg->mbox_offset + index * 0x4);  in mpfs_mbox_send_data()
142 			val = readl_relaxed(mbox->mbox_base + msg->mbox_offset + index * 0x4);  in mpfs_mbox_send_data()
149 			writel_relaxed(val, mbox->mbox_base + msg->mbox_offset + index * 0x4);  in mpfs_mbox_send_data()
158 	if (mbox->control_scb)  in mpfs_mbox_send_data()
159 		regmap_write(mbox->control_scb, SERVICES_CR_OFFSET, tx_trigger);  in mpfs_mbox_send_data()
161 		writel_relaxed(tx_trigger, mbox->ctrl_base + SERVICES_CR_OFFSET);  in mpfs_mbox_send_data()
169 	struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv;  in mpfs_mbox_rx_data()  local
170 	struct mpfs_mss_response *response = mbox->response;  in mpfs_mbox_rx_data()
175 		dev_err(mbox->dev, "failed to assign memory for response %d\n", -ENOMEM);  in mpfs_mbox_rx_data()
184 	if (mpfs_mbox_busy(mbox)) {  in mpfs_mbox_rx_data()
185 		dev_err(mbox->dev, "got an interrupt but system controller is busy\n");  in mpfs_mbox_rx_data()
192 			readl_relaxed(mbox->mbox_base  in mpfs_mbox_rx_data()
193 				      + mbox->resp_offset + i * 0x4);  in mpfs_mbox_rx_data()
202 	struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv;  in mpfs_mbox_inbox_isr()  local
204 	if (mbox->control_scb)  in mpfs_mbox_inbox_isr()
205 		regmap_write(mbox->sysreg_scb, MESSAGE_INT_OFFSET, 0);  in mpfs_mbox_inbox_isr()
207 		writel_relaxed(0, mbox->int_reg);  in mpfs_mbox_inbox_isr()
216 	struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv;  in mpfs_mbox_startup()  local
219 	if (!mbox)  in mpfs_mbox_startup()
222 	ret = devm_request_irq(mbox->dev, mbox->irq, mpfs_mbox_inbox_isr, 0, "mpfs-mailbox", chan);  in mpfs_mbox_startup()
224 		dev_err(mbox->dev, "failed to register mailbox interrupt:%d\n", ret);  in mpfs_mbox_startup()
231 	struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv;  in mpfs_mbox_shutdown()  local
233 	devm_free_irq(mbox->dev, mbox->irq, chan);  in mpfs_mbox_shutdown()
243 static inline int mpfs_mbox_syscon_probe(struct mpfs_mbox *mbox, struct platform_device *pdev)  in mpfs_mbox_syscon_probe()  argument
245 	mbox->control_scb = syscon_regmap_lookup_by_compatible("microchip,mpfs-control-scb");  in mpfs_mbox_syscon_probe()
246 	if (IS_ERR(mbox->control_scb))  in mpfs_mbox_syscon_probe()
247 		return PTR_ERR(mbox->control_scb);  in mpfs_mbox_syscon_probe()
249 	mbox->sysreg_scb = syscon_regmap_lookup_by_compatible("microchip,mpfs-sysreg-scb");  in mpfs_mbox_syscon_probe()
250 	if (IS_ERR(mbox->sysreg_scb))  in mpfs_mbox_syscon_probe()
251 		return PTR_ERR(mbox->sysreg_scb);  in mpfs_mbox_syscon_probe()
253 	mbox->mbox_base = devm_platform_ioremap_resource(pdev, 0);  in mpfs_mbox_syscon_probe()
254 	if (IS_ERR(mbox->mbox_base))  in mpfs_mbox_syscon_probe()
255 		return PTR_ERR(mbox->mbox_base);  in mpfs_mbox_syscon_probe()
260 static inline int mpfs_mbox_old_format_probe(struct mpfs_mbox *mbox, struct platform_device *pdev)  in mpfs_mbox_old_format_probe()  argument
264 	mbox->ctrl_base = devm_platform_ioremap_resource(pdev, 0);  in mpfs_mbox_old_format_probe()
265 	if (IS_ERR(mbox->ctrl_base))  in mpfs_mbox_old_format_probe()
266 		return PTR_ERR(mbox->ctrl_base);  in mpfs_mbox_old_format_probe()
268 	mbox->int_reg = devm_platform_ioremap_resource(pdev, 1);  in mpfs_mbox_old_format_probe()
269 	if (IS_ERR(mbox->int_reg))  in mpfs_mbox_old_format_probe()
270 		return PTR_ERR(mbox->int_reg);  in mpfs_mbox_old_format_probe()
272 	mbox->mbox_base = devm_platform_ioremap_resource(pdev, 2);  in mpfs_mbox_old_format_probe()
273 	if (IS_ERR(mbox->mbox_base)) // account for the old dt-binding w/ 2 regs  in mpfs_mbox_old_format_probe()
274 		mbox->mbox_base = mbox->ctrl_base + MAILBOX_REG_OFFSET;  in mpfs_mbox_old_format_probe()
281 	struct mpfs_mbox *mbox;  in mpfs_mbox_probe()  local
284 	mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox), GFP_KERNEL);  in mpfs_mbox_probe()
285 	if (!mbox)  in mpfs_mbox_probe()
288 	ret = mpfs_mbox_syscon_probe(mbox, pdev);  in mpfs_mbox_probe()
294 		mbox->control_scb = NULL;  in mpfs_mbox_probe()
295 		ret = mpfs_mbox_old_format_probe(mbox, pdev);  in mpfs_mbox_probe()
299 	mbox->irq = platform_get_irq(pdev, 0);  in mpfs_mbox_probe()
300 	if (mbox->irq < 0)  in mpfs_mbox_probe()
301 		return mbox->irq;  in mpfs_mbox_probe()
303 	mbox->dev = &pdev->dev;  in mpfs_mbox_probe()
305 	mbox->chans[0].con_priv = mbox;  in mpfs_mbox_probe()
306 	mbox->controller.dev = mbox->dev;  in mpfs_mbox_probe()
307 	mbox->controller.num_chans = 1;  in mpfs_mbox_probe()
308 	mbox->controller.chans = mbox->chans;  in mpfs_mbox_probe()
309 	mbox->controller.ops = &mpfs_mbox_ops;  in mpfs_mbox_probe()
310 	mbox->controller.txdone_poll = true;  in mpfs_mbox_probe()
311 	mbox->controller.txpoll_period = 10u;  in mpfs_mbox_probe()
313 	ret = devm_mbox_controller_register(&pdev->dev, &mbox->controller);  in mpfs_mbox_probe()