1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Intel(R) Trace Hub ACPI driver
4  *
5  * Copyright (C) 2017 Intel Corporation.
6  */
7 
8 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
9 
10 #include <linux/types.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/sysfs.h>
14 #include <linux/platform_device.h>
15 #include <linux/acpi.h>
16 
17 #include "intel_th.h"
18 
19 #define DRIVER_NAME "intel_th_acpi"
20 
21 static const struct intel_th_drvdata intel_th_acpi_pch = {
22 	.host_mode_only	= 1,
23 };
24 
25 static const struct intel_th_drvdata intel_th_acpi_uncore = {
26 	.host_mode_only	= 1,
27 };
28 
29 static const struct acpi_device_id intel_th_acpi_ids[] = {
30 	{ "INTC1000",	(kernel_ulong_t)&intel_th_acpi_uncore },
31 	{ "INTC1001",	(kernel_ulong_t)&intel_th_acpi_pch },
32 	{ "",		0 },
33 };
34 
35 MODULE_DEVICE_TABLE(acpi, intel_th_acpi_ids);
36 
intel_th_acpi_probe(struct platform_device * pdev)37 static int intel_th_acpi_probe(struct platform_device *pdev)
38 {
39 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
40 	struct resource resource[TH_MMIO_END];
41 	const struct acpi_device_id *id;
42 	struct intel_th *th;
43 	int i, r;
44 
45 	id = acpi_match_device(intel_th_acpi_ids, &pdev->dev);
46 	if (!id)
47 		return -ENODEV;
48 
49 	for (i = 0, r = 0; i < pdev->num_resources && r < TH_MMIO_END; i++)
50 		if (pdev->resource[i].flags &
51 		    (IORESOURCE_IRQ | IORESOURCE_MEM))
52 			resource[r++] = pdev->resource[i];
53 
54 	th = intel_th_alloc(&pdev->dev, (void *)id->driver_data, resource, r);
55 	if (IS_ERR(th))
56 		return PTR_ERR(th);
57 
58 	adev->driver_data = th;
59 
60 	return 0;
61 }
62 
intel_th_acpi_remove(struct platform_device * pdev)63 static int intel_th_acpi_remove(struct platform_device *pdev)
64 {
65 	struct intel_th *th = platform_get_drvdata(pdev);
66 
67 	intel_th_free(th);
68 
69 	return 0;
70 }
71 
72 static struct platform_driver intel_th_acpi_driver = {
73 	.probe		= intel_th_acpi_probe,
74 	.remove		= intel_th_acpi_remove,
75 	.driver		= {
76 		.name			= DRIVER_NAME,
77 		.acpi_match_table	= intel_th_acpi_ids,
78 	},
79 };
80 
81 module_platform_driver(intel_th_acpi_driver);
82 
83 MODULE_LICENSE("GPL v2");
84 MODULE_DESCRIPTION("Intel(R) Trace Hub ACPI controller driver");
85 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
86