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