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97fb5e8d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
25bfee16 BA |
2 | /* |
3 | * Copyright (c) 2017, Linaro Ltd | |
25bfee16 BA |
4 | */ |
5 | ||
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> | |
c6a8b171 | 13 | #include <linux/regmap.h> |
25bfee16 BA |
14 | #include <linux/mailbox_controller.h> |
15 | ||
16 | #define QCOM_APCS_IPC_BITS 32 | |
17 | ||
18 | struct qcom_apcs_ipc { | |
19 | struct mbox_controller mbox; | |
20 | struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS]; | |
21 | ||
c6a8b171 | 22 | struct regmap *regmap; |
25bfee16 | 23 | unsigned long offset; |
c815d769 | 24 | struct platform_device *clk; |
25bfee16 BA |
25 | }; |
26 | ||
9b007938 SM |
27 | struct qcom_apcs_ipc_data { |
28 | int offset; | |
29 | char *clk_name; | |
30 | }; | |
31 | ||
e9f901dc SM |
32 | static const struct qcom_apcs_ipc_data ipq6018_apcs_data = { |
33 | .offset = 8, .clk_name = "qcom,apss-ipq6018-clk" | |
34 | }; | |
35 | ||
9b007938 SM |
36 | static const struct qcom_apcs_ipc_data msm8916_apcs_data = { |
37 | .offset = 8, .clk_name = "qcom-apcs-msm8916-clk" | |
38 | }; | |
39 | ||
dde68056 KD |
40 | static const struct qcom_apcs_ipc_data msm8994_apcs_data = { |
41 | .offset = 8, .clk_name = NULL | |
42 | }; | |
43 | ||
9b007938 SM |
44 | static const struct qcom_apcs_ipc_data msm8996_apcs_data = { |
45 | .offset = 16, .clk_name = NULL | |
46 | }; | |
47 | ||
9b007938 SM |
48 | static const struct qcom_apcs_ipc_data apps_shared_apcs_data = { |
49 | .offset = 12, .clk_name = NULL | |
50 | }; | |
51 | ||
c319f78c MS |
52 | static const struct qcom_apcs_ipc_data sdx55_apcs_data = { |
53 | .offset = 0x1008, .clk_name = "qcom-sdx55-acps-clk" | |
54 | }; | |
55 | ||
c6a8b171 GD |
56 | static const struct regmap_config apcs_regmap_config = { |
57 | .reg_bits = 32, | |
58 | .reg_stride = 4, | |
59 | .val_bits = 32, | |
c319f78c | 60 | .max_register = 0x1008, |
c6a8b171 GD |
61 | .fast_io = true, |
62 | }; | |
63 | ||
25bfee16 BA |
64 | static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data) |
65 | { | |
66 | struct qcom_apcs_ipc *apcs = container_of(chan->mbox, | |
67 | struct qcom_apcs_ipc, mbox); | |
68 | unsigned long idx = (unsigned long)chan->con_priv; | |
69 | ||
c6a8b171 | 70 | return regmap_write(apcs->regmap, apcs->offset, BIT(idx)); |
25bfee16 BA |
71 | } |
72 | ||
73 | static const struct mbox_chan_ops qcom_apcs_ipc_ops = { | |
74 | .send_data = qcom_apcs_ipc_send_data, | |
75 | }; | |
76 | ||
77 | static int qcom_apcs_ipc_probe(struct platform_device *pdev) | |
78 | { | |
79 | struct qcom_apcs_ipc *apcs; | |
9b007938 | 80 | const struct qcom_apcs_ipc_data *apcs_data; |
c6a8b171 | 81 | struct regmap *regmap; |
25bfee16 BA |
82 | void __iomem *base; |
83 | unsigned long i; | |
84 | int ret; | |
85 | ||
86 | apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL); | |
87 | if (!apcs) | |
88 | return -ENOMEM; | |
89 | ||
78c6798c | 90 | base = devm_platform_ioremap_resource(pdev, 0); |
25bfee16 BA |
91 | if (IS_ERR(base)) |
92 | return PTR_ERR(base); | |
93 | ||
c6a8b171 GD |
94 | regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config); |
95 | if (IS_ERR(regmap)) | |
96 | return PTR_ERR(regmap); | |
97 | ||
9b007938 | 98 | apcs_data = of_device_get_match_data(&pdev->dev); |
25bfee16 | 99 | |
c6a8b171 | 100 | apcs->regmap = regmap; |
9b007938 | 101 | apcs->offset = apcs_data->offset; |
25bfee16 BA |
102 | |
103 | /* Initialize channel identifiers */ | |
104 | for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++) | |
105 | apcs->mbox_chans[i].con_priv = (void *)i; | |
106 | ||
107 | apcs->mbox.dev = &pdev->dev; | |
108 | apcs->mbox.ops = &qcom_apcs_ipc_ops; | |
109 | apcs->mbox.chans = apcs->mbox_chans; | |
110 | apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans); | |
111 | ||
83dd44a1 | 112 | ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox); |
25bfee16 BA |
113 | if (ret) { |
114 | dev_err(&pdev->dev, "failed to register APCS IPC controller\n"); | |
115 | return ret; | |
116 | } | |
117 | ||
9b007938 | 118 | if (apcs_data->clk_name) { |
c815d769 | 119 | apcs->clk = platform_device_register_data(&pdev->dev, |
9b007938 | 120 | apcs_data->clk_name, |
96e39e95 | 121 | PLATFORM_DEVID_AUTO, |
16d52f33 | 122 | NULL, 0); |
c815d769 GD |
123 | if (IS_ERR(apcs->clk)) |
124 | dev_err(&pdev->dev, "failed to register APCS clk\n"); | |
125 | } | |
126 | ||
25bfee16 BA |
127 | platform_set_drvdata(pdev, apcs); |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | static int qcom_apcs_ipc_remove(struct platform_device *pdev) | |
133 | { | |
134 | struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev); | |
c815d769 | 135 | struct platform_device *clk = apcs->clk; |
25bfee16 | 136 | |
c815d769 | 137 | platform_device_unregister(clk); |
25bfee16 BA |
138 | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* .data is the offset of the ipc register within the global block */ | |
143 | static const struct of_device_id qcom_apcs_ipc_of_match[] = { | |
e9f901dc | 144 | { .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data }, |
f5fe925d | 145 | { .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq6018_apcs_data }, |
9b007938 | 146 | { .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data }, |
8a7cdb10 | 147 | { .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data }, |
e5c11ee3 | 148 | { .compatible = "qcom,msm8953-apcs-kpss-global", .data = &msm8994_apcs_data }, |
5c0fab31 | 149 | { .compatible = "qcom,msm8976-apcs-kpss-global", .data = &msm8994_apcs_data }, |
dde68056 | 150 | { .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data }, |
9b007938 | 151 | { .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data }, |
4523ec8b | 152 | { .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8994_apcs_data }, |
db28a59e | 153 | { .compatible = "qcom,qcm2290-apcs-hmss-global", .data = &msm8994_apcs_data }, |
9b007938 SM |
154 | { .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data }, |
155 | { .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data }, | |
d10c851f | 156 | { .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data }, |
4523ec8b | 157 | { .compatible = "qcom,sdm660-apcs-hmss-global", .data = &msm8994_apcs_data }, |
9b007938 | 158 | { .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data }, |
4523ec8b | 159 | { .compatible = "qcom,sm6125-apcs-hmss-global", .data = &msm8994_apcs_data }, |
9b007938 | 160 | { .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data }, |
4523ec8b | 161 | { .compatible = "qcom,sm6115-apcs-hmss-global", .data = &msm8994_apcs_data }, |
c319f78c | 162 | { .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data }, |
25bfee16 BA |
163 | {} |
164 | }; | |
165 | MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match); | |
166 | ||
167 | static struct platform_driver qcom_apcs_ipc_driver = { | |
168 | .probe = qcom_apcs_ipc_probe, | |
169 | .remove = qcom_apcs_ipc_remove, | |
170 | .driver = { | |
171 | .name = "qcom_apcs_ipc", | |
172 | .of_match_table = qcom_apcs_ipc_of_match, | |
173 | }, | |
174 | }; | |
175 | ||
176 | static int __init qcom_apcs_ipc_init(void) | |
177 | { | |
178 | return platform_driver_register(&qcom_apcs_ipc_driver); | |
179 | } | |
180 | postcore_initcall(qcom_apcs_ipc_init); | |
181 | ||
182 | static void __exit qcom_apcs_ipc_exit(void) | |
183 | { | |
184 | platform_driver_unregister(&qcom_apcs_ipc_driver); | |
185 | } | |
186 | module_exit(qcom_apcs_ipc_exit); | |
187 | ||
188 | MODULE_LICENSE("GPL v2"); | |
189 | MODULE_DESCRIPTION("Qualcomm APCS IPC driver"); |