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1/*
2 * Copyright (c) 2017, Linaro Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/io.h>
17#include <linux/slab.h>
18#include <linux/of.h>
19#include <linux/of_platform.h>
20#include <linux/platform_device.h>
21#include <linux/regmap.h>
22#include <linux/mailbox_controller.h>
23
24#define QCOM_APCS_IPC_BITS 32
25
26struct qcom_apcs_ipc {
27 struct mbox_controller mbox;
28 struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];
29
30 struct regmap *regmap;
31 unsigned long offset;
32 struct platform_device *clk;
33};
34
35static const struct regmap_config apcs_regmap_config = {
36 .reg_bits = 32,
37 .reg_stride = 4,
38 .val_bits = 32,
39 .max_register = 0x1000,
40 .fast_io = true,
41};
42
43static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)
44{
45 struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
46 struct qcom_apcs_ipc, mbox);
47 unsigned long idx = (unsigned long)chan->con_priv;
48
49 return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
50}
51
52static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
53 .send_data = qcom_apcs_ipc_send_data,
54};
55
56static int qcom_apcs_ipc_probe(struct platform_device *pdev)
57{
58 struct device_node *np = pdev->dev.of_node;
59 struct qcom_apcs_ipc *apcs;
60 struct regmap *regmap;
61 struct resource *res;
62 unsigned long offset;
63 void __iomem *base;
64 unsigned long i;
65 int ret;
66
67 apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
68 if (!apcs)
69 return -ENOMEM;
70
71 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
72 base = devm_ioremap_resource(&pdev->dev, res);
73 if (IS_ERR(base))
74 return PTR_ERR(base);
75
76 regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
77 if (IS_ERR(regmap))
78 return PTR_ERR(regmap);
79
80 offset = (unsigned long)of_device_get_match_data(&pdev->dev);
81
82 apcs->regmap = regmap;
83 apcs->offset = offset;
84
85 /* Initialize channel identifiers */
86 for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
87 apcs->mbox_chans[i].con_priv = (void *)i;
88
89 apcs->mbox.dev = &pdev->dev;
90 apcs->mbox.ops = &qcom_apcs_ipc_ops;
91 apcs->mbox.chans = apcs->mbox_chans;
92 apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);
93
94 ret = mbox_controller_register(&apcs->mbox);
95 if (ret) {
96 dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
97 return ret;
98 }
99
100 if (of_device_is_compatible(np, "qcom,msm8916-apcs-kpss-global")) {
101 apcs->clk = platform_device_register_data(&pdev->dev,
102 "qcom-apcs-msm8916-clk",
103 -1, NULL, 0);
104 if (IS_ERR(apcs->clk))
105 dev_err(&pdev->dev, "failed to register APCS clk\n");
106 }
107
108 platform_set_drvdata(pdev, apcs);
109
110 return 0;
111}
112
113static int qcom_apcs_ipc_remove(struct platform_device *pdev)
114{
115 struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
116 struct platform_device *clk = apcs->clk;
117
118 mbox_controller_unregister(&apcs->mbox);
119 platform_device_unregister(clk);
120
121 return 0;
122}
123
124/* .data is the offset of the ipc register within the global block */
125static const struct of_device_id qcom_apcs_ipc_of_match[] = {
126 { .compatible = "qcom,msm8916-apcs-kpss-global", .data = (void *)8 },
127 { .compatible = "qcom,msm8996-apcs-hmss-global", .data = (void *)16 },
128 {}
129};
130MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);
131
132static struct platform_driver qcom_apcs_ipc_driver = {
133 .probe = qcom_apcs_ipc_probe,
134 .remove = qcom_apcs_ipc_remove,
135 .driver = {
136 .name = "qcom_apcs_ipc",
137 .of_match_table = qcom_apcs_ipc_of_match,
138 },
139};
140
141static int __init qcom_apcs_ipc_init(void)
142{
143 return platform_driver_register(&qcom_apcs_ipc_driver);
144}
145postcore_initcall(qcom_apcs_ipc_init);
146
147static void __exit qcom_apcs_ipc_exit(void)
148{
149 platform_driver_unregister(&qcom_apcs_ipc_driver);
150}
151module_exit(qcom_apcs_ipc_exit);
152
153MODULE_LICENSE("GPL v2");
154MODULE_DESCRIPTION("Qualcomm APCS IPC driver");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2017, Linaro Ltd
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>
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 sm6125_apcs_data = {
61 .offset = 8, .clk_name = NULL
62};
63
64static const struct qcom_apcs_ipc_data apps_shared_apcs_data = {
65 .offset = 12, .clk_name = NULL
66};
67
68static const struct qcom_apcs_ipc_data sdx55_apcs_data = {
69 .offset = 0x1008, .clk_name = "qcom-sdx55-acps-clk"
70};
71
72static const struct regmap_config apcs_regmap_config = {
73 .reg_bits = 32,
74 .reg_stride = 4,
75 .val_bits = 32,
76 .max_register = 0x1008,
77 .fast_io = true,
78};
79
80static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)
81{
82 struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
83 struct qcom_apcs_ipc, mbox);
84 unsigned long idx = (unsigned long)chan->con_priv;
85
86 return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
87}
88
89static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
90 .send_data = qcom_apcs_ipc_send_data,
91};
92
93static int qcom_apcs_ipc_probe(struct platform_device *pdev)
94{
95 struct qcom_apcs_ipc *apcs;
96 const struct qcom_apcs_ipc_data *apcs_data;
97 struct regmap *regmap;
98 struct resource *res;
99 void __iomem *base;
100 unsigned long i;
101 int ret;
102
103 apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
104 if (!apcs)
105 return -ENOMEM;
106
107 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
108 base = devm_ioremap_resource(&pdev->dev, res);
109 if (IS_ERR(base))
110 return PTR_ERR(base);
111
112 regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
113 if (IS_ERR(regmap))
114 return PTR_ERR(regmap);
115
116 apcs_data = of_device_get_match_data(&pdev->dev);
117
118 apcs->regmap = regmap;
119 apcs->offset = apcs_data->offset;
120
121 /* Initialize channel identifiers */
122 for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
123 apcs->mbox_chans[i].con_priv = (void *)i;
124
125 apcs->mbox.dev = &pdev->dev;
126 apcs->mbox.ops = &qcom_apcs_ipc_ops;
127 apcs->mbox.chans = apcs->mbox_chans;
128 apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);
129
130 ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);
131 if (ret) {
132 dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
133 return ret;
134 }
135
136 if (apcs_data->clk_name) {
137 apcs->clk = platform_device_register_data(&pdev->dev,
138 apcs_data->clk_name,
139 PLATFORM_DEVID_AUTO,
140 NULL, 0);
141 if (IS_ERR(apcs->clk))
142 dev_err(&pdev->dev, "failed to register APCS clk\n");
143 }
144
145 platform_set_drvdata(pdev, apcs);
146
147 return 0;
148}
149
150static int qcom_apcs_ipc_remove(struct platform_device *pdev)
151{
152 struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
153 struct platform_device *clk = apcs->clk;
154
155 platform_device_unregister(clk);
156
157 return 0;
158}
159
160/* .data is the offset of the ipc register within the global block */
161static const struct of_device_id qcom_apcs_ipc_of_match[] = {
162 { .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
163 { .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq8074_apcs_data },
164 { .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
165 { .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data },
166 { .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
167 { .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
168 { .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8998_apcs_data },
169 { .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },
170 { .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },
171 { .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data },
172 { .compatible = "qcom,sdm660-apcs-hmss-global", .data = &sdm660_apcs_data },
173 { .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },
174 { .compatible = "qcom,sm6125-apcs-hmss-global", .data = &sm6125_apcs_data },
175 { .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data },
176 { .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data },
177 {}
178};
179MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);
180
181static struct platform_driver qcom_apcs_ipc_driver = {
182 .probe = qcom_apcs_ipc_probe,
183 .remove = qcom_apcs_ipc_remove,
184 .driver = {
185 .name = "qcom_apcs_ipc",
186 .of_match_table = qcom_apcs_ipc_of_match,
187 },
188};
189
190static int __init qcom_apcs_ipc_init(void)
191{
192 return platform_driver_register(&qcom_apcs_ipc_driver);
193}
194postcore_initcall(qcom_apcs_ipc_init);
195
196static void __exit qcom_apcs_ipc_exit(void)
197{
198 platform_driver_unregister(&qcom_apcs_ipc_driver);
199}
200module_exit(qcom_apcs_ipc_exit);
201
202MODULE_LICENSE("GPL v2");
203MODULE_DESCRIPTION("Qualcomm APCS IPC driver");