1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 //
3 // This file is provided under a dual BSD/GPLv2 license. When using or
4 // redistributing this file, you may do so under either license.
5 //
6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
7 //
8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
9 //
10
11 #include <linux/acpi.h>
12 #include <linux/firmware.h>
13 #include <linux/module.h>
14 #include <linux/pm_runtime.h>
15 #include <sound/soc-acpi.h>
16 #include <sound/soc-acpi-intel-match.h>
17 #include <sound/sof.h>
18 #include "../intel/common/soc-intel-quirks.h"
19 #include "ops.h"
20 #include "sof-acpi-dev.h"
21
22 /* platform specific devices */
23 #include "intel/shim.h"
24
25 static char *fw_path;
26 module_param(fw_path, charp, 0444);
27 MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
28
29 static char *tplg_path;
30 module_param(tplg_path, charp, 0444);
31 MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
32
33 static int sof_acpi_debug;
34 module_param_named(sof_acpi_debug, sof_acpi_debug, int, 0444);
35 MODULE_PARM_DESC(sof_acpi_debug, "SOF ACPI debug options (0x0 all off)");
36
37 #define SOF_ACPI_DISABLE_PM_RUNTIME BIT(0)
38
39 const struct dev_pm_ops sof_acpi_pm = {
40 SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
41 SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
42 snd_sof_runtime_idle)
43 };
44 EXPORT_SYMBOL_NS(sof_acpi_pm, SND_SOC_SOF_ACPI_DEV);
45
sof_acpi_probe_complete(struct device * dev)46 static void sof_acpi_probe_complete(struct device *dev)
47 {
48 dev_dbg(dev, "Completing SOF ACPI probe");
49
50 if (sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME)
51 return;
52
53 /* allow runtime_pm */
54 pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
55 pm_runtime_use_autosuspend(dev);
56 pm_runtime_enable(dev);
57 }
58
sof_acpi_probe(struct platform_device * pdev,const struct sof_dev_desc * desc)59 int sof_acpi_probe(struct platform_device *pdev, const struct sof_dev_desc *desc)
60 {
61 struct device *dev = &pdev->dev;
62 struct snd_sof_pdata *sof_pdata;
63
64 dev_dbg(dev, "ACPI DSP detected");
65
66 sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
67 if (!sof_pdata)
68 return -ENOMEM;
69
70 if (!desc->ops) {
71 dev_err(dev, "error: no matching ACPI descriptor ops\n");
72 return -ENODEV;
73 }
74
75 sof_pdata->desc = desc;
76 sof_pdata->dev = &pdev->dev;
77 sof_pdata->fw_filename = desc->default_fw_filename[SOF_IPC];
78
79 /* alternate fw and tplg filenames ? */
80 if (fw_path)
81 sof_pdata->fw_filename_prefix = fw_path;
82 else
83 sof_pdata->fw_filename_prefix =
84 sof_pdata->desc->default_fw_path[SOF_IPC];
85
86 if (tplg_path)
87 sof_pdata->tplg_filename_prefix = tplg_path;
88 else
89 sof_pdata->tplg_filename_prefix =
90 sof_pdata->desc->default_tplg_path[SOF_IPC];
91
92 /* set callback to be called on successful device probe to enable runtime_pm */
93 sof_pdata->sof_probe_complete = sof_acpi_probe_complete;
94
95 /* call sof helper for DSP hardware probe */
96 return snd_sof_device_probe(dev, sof_pdata);
97 }
98 EXPORT_SYMBOL_NS(sof_acpi_probe, SND_SOC_SOF_ACPI_DEV);
99
sof_acpi_remove(struct platform_device * pdev)100 int sof_acpi_remove(struct platform_device *pdev)
101 {
102 struct device *dev = &pdev->dev;
103
104 if (!(sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME))
105 pm_runtime_disable(dev);
106
107 /* call sof helper for DSP hardware remove */
108 snd_sof_device_remove(dev);
109
110 return 0;
111 }
112 EXPORT_SYMBOL_NS(sof_acpi_remove, SND_SOC_SOF_ACPI_DEV);
113
114 MODULE_LICENSE("Dual BSD/GPL");
115