1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2017, Linaro Ltd
6 #include <linux/kernel.h>
7 #include <linux/module.h>
9 #include <linux/slab.h>
11 #include <linux/of_platform.h>
12 #include <linux/platform_device.h>
13 #include <linux/regmap.h>
14 #include <linux/mailbox_controller.h>
16 #define QCOM_APCS_IPC_BITS 32
18 struct qcom_apcs_ipc {
19 struct mbox_controller mbox;
20 struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];
22 struct regmap *regmap;
24 struct platform_device *clk;
27 struct qcom_apcs_ipc_data {
32 static const struct qcom_apcs_ipc_data ipq6018_apcs_data = {
33 .offset = 8, .clk_name = "qcom,apss-ipq6018-clk"
36 static const struct qcom_apcs_ipc_data ipq8074_apcs_data = {
37 .offset = 8, .clk_name = NULL
40 static const struct qcom_apcs_ipc_data msm8916_apcs_data = {
41 .offset = 8, .clk_name = "qcom-apcs-msm8916-clk"
44 static const struct qcom_apcs_ipc_data msm8994_apcs_data = {
45 .offset = 8, .clk_name = NULL
48 static const struct qcom_apcs_ipc_data msm8996_apcs_data = {
49 .offset = 16, .clk_name = NULL
52 static const struct qcom_apcs_ipc_data msm8998_apcs_data = {
53 .offset = 8, .clk_name = NULL
56 static const struct qcom_apcs_ipc_data sdm660_apcs_data = {
57 .offset = 8, .clk_name = NULL
60 static const struct qcom_apcs_ipc_data apps_shared_apcs_data = {
61 .offset = 12, .clk_name = NULL
64 static const struct qcom_apcs_ipc_data sdx55_apcs_data = {
65 .offset = 0x1008, .clk_name = "qcom-sdx55-acps-clk"
68 static const struct regmap_config apcs_regmap_config = {
72 .max_register = 0x1008,
76 static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)
78 struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
79 struct qcom_apcs_ipc, mbox);
80 unsigned long idx = (unsigned long)chan->con_priv;
82 return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
85 static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
86 .send_data = qcom_apcs_ipc_send_data,
89 static int qcom_apcs_ipc_probe(struct platform_device *pdev)
91 struct qcom_apcs_ipc *apcs;
92 const struct qcom_apcs_ipc_data *apcs_data;
93 struct regmap *regmap;
99 apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
103 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
104 base = devm_ioremap_resource(&pdev->dev, res);
106 return PTR_ERR(base);
108 regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
110 return PTR_ERR(regmap);
112 apcs_data = of_device_get_match_data(&pdev->dev);
114 apcs->regmap = regmap;
115 apcs->offset = apcs_data->offset;
117 /* Initialize channel identifiers */
118 for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
119 apcs->mbox_chans[i].con_priv = (void *)i;
121 apcs->mbox.dev = &pdev->dev;
122 apcs->mbox.ops = &qcom_apcs_ipc_ops;
123 apcs->mbox.chans = apcs->mbox_chans;
124 apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);
126 ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);
128 dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
132 if (apcs_data->clk_name) {
133 apcs->clk = platform_device_register_data(&pdev->dev,
137 if (IS_ERR(apcs->clk))
138 dev_err(&pdev->dev, "failed to register APCS clk\n");
141 platform_set_drvdata(pdev, apcs);
146 static int qcom_apcs_ipc_remove(struct platform_device *pdev)
148 struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
149 struct platform_device *clk = apcs->clk;
151 platform_device_unregister(clk);
156 /* .data is the offset of the ipc register within the global block */
157 static const struct of_device_id qcom_apcs_ipc_of_match[] = {
158 { .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
159 { .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq8074_apcs_data },
160 { .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
161 { .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
162 { .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
163 { .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8998_apcs_data },
164 { .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },
165 { .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },
166 { .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data },
167 { .compatible = "qcom,sdm660-apcs-hmss-global", .data = &sdm660_apcs_data },
168 { .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },
169 { .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data },
170 { .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data },
173 MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);
175 static struct platform_driver qcom_apcs_ipc_driver = {
176 .probe = qcom_apcs_ipc_probe,
177 .remove = qcom_apcs_ipc_remove,
179 .name = "qcom_apcs_ipc",
180 .of_match_table = qcom_apcs_ipc_of_match,
184 static int __init qcom_apcs_ipc_init(void)
186 return platform_driver_register(&qcom_apcs_ipc_driver);
188 postcore_initcall(qcom_apcs_ipc_init);
190 static void __exit qcom_apcs_ipc_exit(void)
192 platform_driver_unregister(&qcom_apcs_ipc_driver);
194 module_exit(qcom_apcs_ipc_exit);
196 MODULE_LICENSE("GPL v2");
197 MODULE_DESCRIPTION("Qualcomm APCS IPC driver");