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>
18 /* 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
74 	struct qcom_ipcc *ipcc = data;  in qcom_ipcc_irq_fn()  local
79 		hwirq = readl(ipcc->base + IPCC_REG_RECV_ID);  in qcom_ipcc_irq_fn()
83 		virq = irq_find_mapping(ipcc->irq_domain, hwirq);  in qcom_ipcc_irq_fn()
84 		writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_CLEAR);  in qcom_ipcc_irq_fn()
93 	struct qcom_ipcc *ipcc = irq_data_get_irq_chip_data(irqd);  in qcom_ipcc_mask_irq()  local
96 	writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_DISABLE);  in qcom_ipcc_mask_irq()
101 	struct qcom_ipcc *ipcc = irq_data_get_irq_chip_data(irqd);  in qcom_ipcc_unmask_irq()  local
104 	writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_ENABLE);  in qcom_ipcc_unmask_irq()
108 	.name = "ipcc",
117 	struct qcom_ipcc *ipcc = d->host_data;  in qcom_ipcc_domain_map()  local
120 	irq_set_chip_data(irq, ipcc);  in qcom_ipcc_domain_map()
133 		return -EINVAL;  in qcom_ipcc_domain_xlate()
148 	struct qcom_ipcc *ipcc = to_qcom_ipcc(chan->mbox);  in qcom_ipcc_mbox_send_data()  local
149 	struct qcom_ipcc_chan_info *mchan = chan->con_priv;  in qcom_ipcc_mbox_send_data()
152 	hwirq = qcom_ipcc_get_hwirq(mchan->client_id, mchan->signal_id);  in qcom_ipcc_mbox_send_data()
153 	writel(hwirq, ipcc->base + IPCC_REG_SEND_ID);  in qcom_ipcc_mbox_send_data()
161 	struct qcom_ipcc *ipcc = to_qcom_ipcc(mbox);  in qcom_ipcc_mbox_xlate()  local
166 	if (ph->args_count != 2)  in qcom_ipcc_mbox_xlate()
167 		return ERR_PTR(-EINVAL);  in qcom_ipcc_mbox_xlate()
170 		chan = &ipcc->chan[i];  in qcom_ipcc_mbox_xlate()
171 		if (!chan->con_priv) {  in qcom_ipcc_mbox_xlate()
172 			mchan = &ipcc->mchan[i];  in qcom_ipcc_mbox_xlate()
173 			mchan->client_id = ph->args[0];  in qcom_ipcc_mbox_xlate()
174 			mchan->signal_id = ph->args[1];  in qcom_ipcc_mbox_xlate()
175 			chan->con_priv = mchan;  in qcom_ipcc_mbox_xlate()
182 	return chan ?: ERR_PTR(-EBUSY);  in qcom_ipcc_mbox_xlate()
189 static int qcom_ipcc_setup_mbox(struct qcom_ipcc *ipcc)  in qcom_ipcc_setup_mbox()  argument
192 	struct device *dev = ipcc->dev;  in qcom_ipcc_setup_mbox()
194 	mbox = &ipcc->mbox;  in qcom_ipcc_setup_mbox()
195 	mbox->dev = dev;  in qcom_ipcc_setup_mbox()
196 	mbox->num_chans = IPCC_MBOX_MAX_CHAN;  in qcom_ipcc_setup_mbox()
197 	mbox->chans = ipcc->chan;  in qcom_ipcc_setup_mbox()
198 	mbox->ops = &ipcc_mbox_chan_ops;  in qcom_ipcc_setup_mbox()
199 	mbox->of_xlate = qcom_ipcc_mbox_xlate;  in qcom_ipcc_setup_mbox()
200 	mbox->txdone_irq = false;  in qcom_ipcc_setup_mbox()
201 	mbox->txdone_poll = false;  in qcom_ipcc_setup_mbox()
208 	struct qcom_ipcc *ipcc;  in qcom_ipcc_probe()  local
211 	ipcc = devm_kzalloc(&pdev->dev, sizeof(*ipcc), GFP_KERNEL);  in qcom_ipcc_probe()
212 	if (!ipcc)  in qcom_ipcc_probe()
213 		return -ENOMEM;  in qcom_ipcc_probe()
215 	ipcc->dev = &pdev->dev;  in qcom_ipcc_probe()
217 	ipcc->base = devm_platform_ioremap_resource(pdev, 0);  in qcom_ipcc_probe()
218 	if (IS_ERR(ipcc->base))  in qcom_ipcc_probe()
219 		return PTR_ERR(ipcc->base);  in qcom_ipcc_probe()
221 	ipcc->irq = platform_get_irq(pdev, 0);  in qcom_ipcc_probe()
222 	if (ipcc->irq < 0)  in qcom_ipcc_probe()
223 		return ipcc->irq;  in qcom_ipcc_probe()
225 	ipcc->irq_domain = irq_domain_add_tree(pdev->dev.of_node,  in qcom_ipcc_probe()
226 					       &qcom_ipcc_irq_ops, ipcc);  in qcom_ipcc_probe()
227 	if (!ipcc->irq_domain)  in qcom_ipcc_probe()
228 		return -ENOMEM;  in qcom_ipcc_probe()
230 	ret = qcom_ipcc_setup_mbox(ipcc);  in qcom_ipcc_probe()
234 	ret = devm_request_irq(&pdev->dev, ipcc->irq, qcom_ipcc_irq_fn,  in qcom_ipcc_probe()
235 			       IRQF_TRIGGER_HIGH, "ipcc", ipcc);  in qcom_ipcc_probe()
237 		dev_err(&pdev->dev, "Failed to register the irq: %d\n", ret);  in qcom_ipcc_probe()
241 	enable_irq_wake(ipcc->irq);  in qcom_ipcc_probe()
242 	platform_set_drvdata(pdev, ipcc);  in qcom_ipcc_probe()
247 	irq_domain_remove(ipcc->irq_domain);  in qcom_ipcc_probe()
254 	struct qcom_ipcc *ipcc = platform_get_drvdata(pdev);  in qcom_ipcc_remove()  local
256 	disable_irq_wake(ipcc->irq);  in qcom_ipcc_remove()
257 	irq_domain_remove(ipcc->irq_domain);  in qcom_ipcc_remove()
263 	{ .compatible = "qcom,ipcc"},
272 		.name = "qcom-ipcc",
285 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. IPCC driver");