1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2020-2021 NXP
4 */
5
6#include <linux/init.h>
7#include <linux/interconnect.h>
8#include <linux/ioctl.h>
9#include <linux/list.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/dma-map-ops.h>
13#include <linux/of.h>
14#include <linux/of_platform.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17#include <linux/types.h>
18#include <linux/pm_runtime.h>
19#include <linux/videodev2.h>
20#include <linux/of_reserved_mem.h>
21#include <media/v4l2-device.h>
22#include <media/videobuf2-v4l2.h>
23#include <media/v4l2-mem2mem.h>
24#include <media/v4l2-ioctl.h>
25#include <linux/debugfs.h>
26#include "vpu.h"
27#include "vpu_imx8q.h"
28
29bool debug;
30module_param(debug, bool, 0644);
31
32void vpu_writel(struct vpu_dev *vpu, u32 reg, u32 val)
33{
34	writel(val, vpu->base + reg);
35}
36
37u32 vpu_readl(struct vpu_dev *vpu, u32 reg)
38{
39	return readl(vpu->base + reg);
40}
41
42static void vpu_dev_get(struct vpu_dev *vpu)
43{
44	if (atomic_inc_return(&vpu->ref_vpu) == 1 && vpu->res->setup)
45		vpu->res->setup(vpu);
46}
47
48static void vpu_dev_put(struct vpu_dev *vpu)
49{
50	atomic_dec(&vpu->ref_vpu);
51}
52
53static void vpu_enc_get(struct vpu_dev *vpu)
54{
55	if (atomic_inc_return(&vpu->ref_enc) == 1 && vpu->res->setup_encoder)
56		vpu->res->setup_encoder(vpu);
57}
58
59static void vpu_enc_put(struct vpu_dev *vpu)
60{
61	atomic_dec(&vpu->ref_enc);
62}
63
64static void vpu_dec_get(struct vpu_dev *vpu)
65{
66	if (atomic_inc_return(&vpu->ref_dec) == 1 && vpu->res->setup_decoder)
67		vpu->res->setup_decoder(vpu);
68}
69
70static void vpu_dec_put(struct vpu_dev *vpu)
71{
72	atomic_dec(&vpu->ref_dec);
73}
74
75static int vpu_init_media_device(struct vpu_dev *vpu)
76{
77	vpu->mdev.dev = vpu->dev;
78	strscpy(vpu->mdev.model, "amphion-vpu", sizeof(vpu->mdev.model));
79	strscpy(vpu->mdev.bus_info, "platform: amphion-vpu", sizeof(vpu->mdev.bus_info));
80	media_device_init(&vpu->mdev);
81	vpu->v4l2_dev.mdev = &vpu->mdev;
82
83	return 0;
84}
85
86static int vpu_probe(struct platform_device *pdev)
87{
88	struct device *dev = &pdev->dev;
89	struct vpu_dev *vpu;
90	int ret;
91
92	dev_dbg(dev, "probe\n");
93	vpu = devm_kzalloc(dev, sizeof(*vpu), GFP_KERNEL);
94	if (!vpu)
95		return -ENOMEM;
96
97	vpu->pdev = pdev;
98	vpu->dev = dev;
99	mutex_init(&vpu->lock);
100	INIT_LIST_HEAD(&vpu->cores);
101	platform_set_drvdata(pdev, vpu);
102	atomic_set(&vpu->ref_vpu, 0);
103	atomic_set(&vpu->ref_enc, 0);
104	atomic_set(&vpu->ref_dec, 0);
105	vpu->get_vpu = vpu_dev_get;
106	vpu->put_vpu = vpu_dev_put;
107	vpu->get_enc = vpu_enc_get;
108	vpu->put_enc = vpu_enc_put;
109	vpu->get_dec = vpu_dec_get;
110	vpu->put_dec = vpu_dec_put;
111
112	vpu->base = devm_platform_ioremap_resource(pdev, 0);
113	if (IS_ERR(vpu->base))
114		return PTR_ERR(vpu->base);
115
116	vpu->res = of_device_get_match_data(dev);
117	if (!vpu->res)
118		return -ENODEV;
119
120	pm_runtime_enable(dev);
121
122	ret = v4l2_device_register(dev, &vpu->v4l2_dev);
123	if (ret)
124		goto err_vpu_deinit;
125
126	vpu_init_media_device(vpu);
127	vpu->encoder.type = VPU_CORE_TYPE_ENC;
128	vpu->encoder.function = MEDIA_ENT_F_PROC_VIDEO_ENCODER;
129	vpu->decoder.type = VPU_CORE_TYPE_DEC;
130	vpu->decoder.function = MEDIA_ENT_F_PROC_VIDEO_DECODER;
131	ret = vpu_add_func(vpu, &vpu->decoder);
132	if (ret)
133		goto err_add_decoder;
134	ret = vpu_add_func(vpu, &vpu->encoder);
135	if (ret)
136		goto err_add_encoder;
137	ret = media_device_register(&vpu->mdev);
138	if (ret)
139		goto err_vpu_media;
140	vpu->debugfs = debugfs_create_dir("amphion_vpu", NULL);
141
142	of_platform_populate(dev->of_node, NULL, NULL, dev);
143
144	return 0;
145
146err_vpu_media:
147	vpu_remove_func(&vpu->encoder);
148err_add_encoder:
149	vpu_remove_func(&vpu->decoder);
150err_add_decoder:
151	media_device_cleanup(&vpu->mdev);
152	v4l2_device_unregister(&vpu->v4l2_dev);
153err_vpu_deinit:
154	pm_runtime_set_suspended(dev);
155	pm_runtime_disable(dev);
156
157	return ret;
158}
159
160static void vpu_remove(struct platform_device *pdev)
161{
162	struct vpu_dev *vpu = platform_get_drvdata(pdev);
163	struct device *dev = &pdev->dev;
164
165	debugfs_remove_recursive(vpu->debugfs);
166	vpu->debugfs = NULL;
167
168	pm_runtime_disable(dev);
169
170	media_device_unregister(&vpu->mdev);
171	vpu_remove_func(&vpu->decoder);
172	vpu_remove_func(&vpu->encoder);
173	media_device_cleanup(&vpu->mdev);
174	v4l2_device_unregister(&vpu->v4l2_dev);
175	mutex_destroy(&vpu->lock);
176}
177
178static int __maybe_unused vpu_runtime_resume(struct device *dev)
179{
180	return 0;
181}
182
183static int __maybe_unused vpu_runtime_suspend(struct device *dev)
184{
185	return 0;
186}
187
188static int __maybe_unused vpu_resume(struct device *dev)
189{
190	return 0;
191}
192
193static int __maybe_unused vpu_suspend(struct device *dev)
194{
195	return 0;
196}
197
198static const struct dev_pm_ops vpu_pm_ops = {
199	SET_RUNTIME_PM_OPS(vpu_runtime_suspend, vpu_runtime_resume, NULL)
200	SET_SYSTEM_SLEEP_PM_OPS(vpu_suspend, vpu_resume)
201};
202
203static struct vpu_resources imx8qxp_res = {
204	.plat_type = IMX8QXP,
205	.mreg_base = 0x40000000,
206	.setup = vpu_imx8q_setup,
207	.setup_encoder = vpu_imx8q_setup_enc,
208	.setup_decoder = vpu_imx8q_setup_dec,
209	.reset = vpu_imx8q_reset
210};
211
212static struct vpu_resources imx8qm_res = {
213	.plat_type = IMX8QM,
214	.mreg_base = 0x40000000,
215	.setup = vpu_imx8q_setup,
216	.setup_encoder = vpu_imx8q_setup_enc,
217	.setup_decoder = vpu_imx8q_setup_dec,
218	.reset = vpu_imx8q_reset
219};
220
221static const struct of_device_id vpu_dt_match[] = {
222	{ .compatible = "nxp,imx8qxp-vpu", .data = &imx8qxp_res },
223	{ .compatible = "nxp,imx8qm-vpu", .data = &imx8qm_res },
224	{}
225};
226MODULE_DEVICE_TABLE(of, vpu_dt_match);
227
228static struct platform_driver amphion_vpu_driver = {
229	.probe = vpu_probe,
230	.remove_new = vpu_remove,
231	.driver = {
232		.name = "amphion-vpu",
233		.of_match_table = vpu_dt_match,
234		.pm = &vpu_pm_ops,
235	},
236};
237
238static int __init vpu_driver_init(void)
239{
240	int ret;
241
242	ret = platform_driver_register(&amphion_vpu_driver);
243	if (ret)
244		return ret;
245
246	ret = vpu_core_driver_init();
247	if (ret)
248		platform_driver_unregister(&amphion_vpu_driver);
249
250	return ret;
251}
252
253static void __exit vpu_driver_exit(void)
254{
255	vpu_core_driver_exit();
256	platform_driver_unregister(&amphion_vpu_driver);
257}
258module_init(vpu_driver_init);
259module_exit(vpu_driver_exit);
260
261MODULE_AUTHOR("Freescale Semiconductor, Inc.");
262MODULE_DESCRIPTION("Linux VPU driver for Freescale i.MX8Q");
263MODULE_LICENSE("GPL v2");
264