1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
14 #include <dt-bindings/mailbox/qcom-ipcc.h>
16 /* IPCC Register offsets */
32  * struct qcom_ipcc_chan_info - Per-mailbox-channel info
33  * @client_id:	The client-id to which the interrupt has to be triggered
34  * @signal_id:	The signal-id to which the interrupt has to be triggered
42  * struct qcom_ipcc - Holder for the mailbox driver
44  * @base:		Base address of the IPCC frame associated to APSS
47  * @mchan:		The per-mailbox channel info array
76 	struct qcom_ipcc *ipcc = data;  in qcom_ipcc_irq_fn()  local
81 		hwirq = readl(ipcc->base + IPCC_REG_RECV_ID);  in qcom_ipcc_irq_fn()
85 		virq = irq_find_mapping(ipcc->irq_domain, hwirq);  in qcom_ipcc_irq_fn()
86 		writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_CLEAR);  in qcom_ipcc_irq_fn()
95 	struct qcom_ipcc *ipcc = irq_data_get_irq_chip_data(irqd);  in qcom_ipcc_mask_irq()  local
98 	writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_DISABLE);  in qcom_ipcc_mask_irq()
103 	struct qcom_ipcc *ipcc = irq_data_get_irq_chip_data(irqd);  in qcom_ipcc_unmask_irq()  local
106 	writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_ENABLE);  in qcom_ipcc_unmask_irq()
110 	.name = "ipcc",
119 	struct qcom_ipcc *ipcc = d->host_data;  in qcom_ipcc_domain_map()  local
122 	irq_set_chip_data(irq, ipcc);  in qcom_ipcc_domain_map()
135 		return -EINVAL;  in qcom_ipcc_domain_xlate()
150 	struct qcom_ipcc *ipcc = to_qcom_ipcc(chan->mbox);  in qcom_ipcc_mbox_send_data()  local
151 	struct qcom_ipcc_chan_info *mchan = chan->con_priv;  in qcom_ipcc_mbox_send_data()
154 	hwirq = qcom_ipcc_get_hwirq(mchan->client_id, mchan->signal_id);  in qcom_ipcc_mbox_send_data()
155 	writel(hwirq, ipcc->base + IPCC_REG_SEND_ID);  in qcom_ipcc_mbox_send_data()
162 	chan->con_priv = NULL;  in qcom_ipcc_mbox_shutdown()
168 	struct qcom_ipcc *ipcc = to_qcom_ipcc(mbox);  in qcom_ipcc_mbox_xlate()  local
174 	dev = ipcc->dev;  in qcom_ipcc_mbox_xlate()
176 	if (ph->args_count != 2)  in qcom_ipcc_mbox_xlate()
177 		return ERR_PTR(-EINVAL);  in qcom_ipcc_mbox_xlate()
179 	for (chan_id = 0; chan_id < mbox->num_chans; chan_id++) {  in qcom_ipcc_mbox_xlate()
180 		chan = &ipcc->chans[chan_id];  in qcom_ipcc_mbox_xlate()
181 		mchan = chan->con_priv;  in qcom_ipcc_mbox_xlate()
185 		else if (mchan->client_id == ph->args[0] &&  in qcom_ipcc_mbox_xlate()
186 				mchan->signal_id == ph->args[1])  in qcom_ipcc_mbox_xlate()
187 			return ERR_PTR(-EBUSY);  in qcom_ipcc_mbox_xlate()
190 	if (chan_id >= mbox->num_chans)  in qcom_ipcc_mbox_xlate()
191 		return ERR_PTR(-EBUSY);  in qcom_ipcc_mbox_xlate()
195 		return ERR_PTR(-ENOMEM);  in qcom_ipcc_mbox_xlate()
197 	mchan->client_id = ph->args[0];  in qcom_ipcc_mbox_xlate()
198 	mchan->signal_id = ph->args[1];  in qcom_ipcc_mbox_xlate()
199 	chan->con_priv = mchan;  in qcom_ipcc_mbox_xlate()
209 static int qcom_ipcc_setup_mbox(struct qcom_ipcc *ipcc,  in qcom_ipcc_setup_mbox()  argument
215 	struct device *dev = ipcc->dev;  in qcom_ipcc_setup_mbox()
222 	ipcc->num_chans = 0;  in qcom_ipcc_setup_mbox()
227 						"mboxes", "#mbox-cells");  in qcom_ipcc_setup_mbox()
230 						"#mbox-cells", j, &curr_ph);  in qcom_ipcc_setup_mbox()
233 				ipcc->num_chans++;  in qcom_ipcc_setup_mbox()
238 	if (!ipcc->num_chans)  in qcom_ipcc_setup_mbox()
241 	ipcc->chans = devm_kcalloc(dev, ipcc->num_chans,  in qcom_ipcc_setup_mbox()
243 	if (!ipcc->chans)  in qcom_ipcc_setup_mbox()
244 		return -ENOMEM;  in qcom_ipcc_setup_mbox()
246 	mbox = &ipcc->mbox;  in qcom_ipcc_setup_mbox()
247 	mbox->dev = dev;  in qcom_ipcc_setup_mbox()
248 	mbox->num_chans = ipcc->num_chans;  in qcom_ipcc_setup_mbox()
249 	mbox->chans = ipcc->chans;  in qcom_ipcc_setup_mbox()
250 	mbox->ops = &ipcc_mbox_chan_ops;  in qcom_ipcc_setup_mbox()
251 	mbox->of_xlate = qcom_ipcc_mbox_xlate;  in qcom_ipcc_setup_mbox()
252 	mbox->txdone_irq = false;  in qcom_ipcc_setup_mbox()
253 	mbox->txdone_poll = false;  in qcom_ipcc_setup_mbox()
260 	struct qcom_ipcc *ipcc = dev_get_drvdata(dev);  in qcom_ipcc_pm_resume()  local
264 	hwirq = readl(ipcc->base + IPCC_REG_RECV_ID);  in qcom_ipcc_pm_resume()
268 	virq = irq_find_mapping(ipcc->irq_domain, hwirq);  in qcom_ipcc_pm_resume()
270 	dev_dbg(dev, "virq: %d triggered client-id: %ld; signal-id: %ld\n", virq,  in qcom_ipcc_pm_resume()
278 	struct qcom_ipcc *ipcc;  in qcom_ipcc_probe()  local
284 	ipcc = devm_kzalloc(&pdev->dev, sizeof(*ipcc), GFP_KERNEL);  in qcom_ipcc_probe()
285 	if (!ipcc)  in qcom_ipcc_probe()
286 		return -ENOMEM;  in qcom_ipcc_probe()
288 	ipcc->dev = &pdev->dev;  in qcom_ipcc_probe()
290 	ipcc->base = devm_platform_ioremap_resource(pdev, 0);  in qcom_ipcc_probe()
291 	if (IS_ERR(ipcc->base))  in qcom_ipcc_probe()
292 		return PTR_ERR(ipcc->base);  in qcom_ipcc_probe()
295 	 * It is possible that boot firmware is using the same IPCC instance  in qcom_ipcc_probe()
301 	config_value = readl(ipcc->base + IPCC_REG_CONFIG);  in qcom_ipcc_probe()
304 		writel(config_value, ipcc->base + IPCC_REG_CONFIG);  in qcom_ipcc_probe()
307 	ipcc->irq = platform_get_irq(pdev, 0);  in qcom_ipcc_probe()
308 	if (ipcc->irq < 0)  in qcom_ipcc_probe()
309 		return ipcc->irq;  in qcom_ipcc_probe()
311 	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "ipcc_%d", id++);  in qcom_ipcc_probe()
313 		return -ENOMEM;  in qcom_ipcc_probe()
315 	ipcc->irq_domain = irq_domain_add_tree(pdev->dev.of_node,  in qcom_ipcc_probe()
316 					       &qcom_ipcc_irq_ops, ipcc);  in qcom_ipcc_probe()
317 	if (!ipcc->irq_domain)  in qcom_ipcc_probe()
318 		return -ENOMEM;  in qcom_ipcc_probe()
320 	ret = qcom_ipcc_setup_mbox(ipcc, pdev->dev.of_node);  in qcom_ipcc_probe()
324 	ret = devm_request_irq(&pdev->dev, ipcc->irq, qcom_ipcc_irq_fn,  in qcom_ipcc_probe()
326 			       IRQF_NO_THREAD, name, ipcc);  in qcom_ipcc_probe()
328 		dev_err(&pdev->dev, "Failed to register the irq: %d\n", ret);  in qcom_ipcc_probe()
332 	platform_set_drvdata(pdev, ipcc);  in qcom_ipcc_probe()
337 	if (ipcc->num_chans)  in qcom_ipcc_probe()
338 		mbox_controller_unregister(&ipcc->mbox);  in qcom_ipcc_probe()
340 	irq_domain_remove(ipcc->irq_domain);  in qcom_ipcc_probe()
347 	struct qcom_ipcc *ipcc = platform_get_drvdata(pdev);  in qcom_ipcc_remove()  local
349 	disable_irq_wake(ipcc->irq);  in qcom_ipcc_remove()
350 	irq_domain_remove(ipcc->irq_domain);  in qcom_ipcc_remove()
354 	{ .compatible = "qcom,ipcc"},
367 		.name = "qcom-ipcc",
382 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. IPCC driver");