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6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/io.h>
9#include <linux/slab.h>
10#include <linux/of.h>
11#include <linux/of_platform.h>
12#include <linux/platform_device.h>
13#include <linux/regmap.h>
14#include <linux/mailbox_controller.h>
15
16#define QCOM_APCS_IPC_BITS 32
17
18struct qcom_apcs_ipc {
19 struct mbox_controller mbox;
20 struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];
21
22 struct regmap *regmap;
23 unsigned long offset;
24 struct platform_device *clk;
25};
26
27struct qcom_apcs_ipc_data {
28 int offset;
29 char *clk_name;
30};
31
32static const struct qcom_apcs_ipc_data ipq6018_apcs_data = {
33 .offset = 8, .clk_name = "qcom,apss-ipq6018-clk"
34};
35
36static const struct qcom_apcs_ipc_data ipq8074_apcs_data = {
37 .offset = 8, .clk_name = NULL
38};
39
40static const struct qcom_apcs_ipc_data msm8916_apcs_data = {
41 .offset = 8, .clk_name = "qcom-apcs-msm8916-clk"
42};
43
44static const struct qcom_apcs_ipc_data msm8994_apcs_data = {
45 .offset = 8, .clk_name = NULL
46};
47
48static const struct qcom_apcs_ipc_data msm8996_apcs_data = {
49 .offset = 16, .clk_name = NULL
50};
51
52static const struct qcom_apcs_ipc_data msm8998_apcs_data = {
53 .offset = 8, .clk_name = NULL
54};
55
56static const struct qcom_apcs_ipc_data sdm660_apcs_data = {
57 .offset = 8, .clk_name = NULL
58};
59
60static const struct qcom_apcs_ipc_data apps_shared_apcs_data = {
61 .offset = 12, .clk_name = NULL
62};
63
64static const struct regmap_config apcs_regmap_config = {
65 .reg_bits = 32,
66 .reg_stride = 4,
67 .val_bits = 32,
68 .max_register = 0xFFC,
69 .fast_io = true,
70};
71
72static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)
73{
74 struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
75 struct qcom_apcs_ipc, mbox);
76 unsigned long idx = (unsigned long)chan->con_priv;
77
78 return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
79}
80
81static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
82 .send_data = qcom_apcs_ipc_send_data,
83};
84
85static int qcom_apcs_ipc_probe(struct platform_device *pdev)
86{
87 struct qcom_apcs_ipc *apcs;
88 const struct qcom_apcs_ipc_data *apcs_data;
89 struct regmap *regmap;
90 struct resource *res;
91 void __iomem *base;
92 unsigned long i;
93 int ret;
94
95 apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
96 if (!apcs)
97 return -ENOMEM;
98
99 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
100 base = devm_ioremap_resource(&pdev->dev, res);
101 if (IS_ERR(base))
102 return PTR_ERR(base);
103
104 regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
105 if (IS_ERR(regmap))
106 return PTR_ERR(regmap);
107
108 apcs_data = of_device_get_match_data(&pdev->dev);
109
110 apcs->regmap = regmap;
111 apcs->offset = apcs_data->offset;
112
113
114 for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
115 apcs->mbox_chans[i].con_priv = (void *)i;
116
117 apcs->mbox.dev = &pdev->dev;
118 apcs->mbox.ops = &qcom_apcs_ipc_ops;
119 apcs->mbox.chans = apcs->mbox_chans;
120 apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);
121
122 ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);
123 if (ret) {
124 dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
125 return ret;
126 }
127
128 if (apcs_data->clk_name) {
129 apcs->clk = platform_device_register_data(&pdev->dev,
130 apcs_data->clk_name,
131 PLATFORM_DEVID_NONE,
132 NULL, 0);
133 if (IS_ERR(apcs->clk))
134 dev_err(&pdev->dev, "failed to register APCS clk\n");
135 }
136
137 platform_set_drvdata(pdev, apcs);
138
139 return 0;
140}
141
142static int qcom_apcs_ipc_remove(struct platform_device *pdev)
143{
144 struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
145 struct platform_device *clk = apcs->clk;
146
147 platform_device_unregister(clk);
148
149 return 0;
150}
151
152
153static const struct of_device_id qcom_apcs_ipc_of_match[] = {
154 { .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
155 { .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq8074_apcs_data },
156 { .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
157 { .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
158 { .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
159 { .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8998_apcs_data },
160 { .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },
161 { .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },
162 { .compatible = "qcom,sdm660-apcs-hmss-global", .data = &sdm660_apcs_data },
163 { .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },
164 { .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data },
165 {}
166};
167MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);
168
169static struct platform_driver qcom_apcs_ipc_driver = {
170 .probe = qcom_apcs_ipc_probe,
171 .remove = qcom_apcs_ipc_remove,
172 .driver = {
173 .name = "qcom_apcs_ipc",
174 .of_match_table = qcom_apcs_ipc_of_match,
175 },
176};
177
178static int __init qcom_apcs_ipc_init(void)
179{
180 return platform_driver_register(&qcom_apcs_ipc_driver);
181}
182postcore_initcall(qcom_apcs_ipc_init);
183
184static void __exit qcom_apcs_ipc_exit(void)
185{
186 platform_driver_unregister(&qcom_apcs_ipc_driver);
187}
188module_exit(qcom_apcs_ipc_exit);
189
190MODULE_LICENSE("GPL v2");
191MODULE_DESCRIPTION("Qualcomm APCS IPC driver");
192
