xref: /openbmc/linux/drivers/hwtracing/intel_th/pci.c (revision abfbd895)
1 /*
2  * Intel(R) Trace Hub pci driver
3  *
4  * Copyright (C) 2014-2015 Intel Corporation.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms and conditions of the GNU General Public License,
8  * version 2, as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13  * more details.
14  */
15 
16 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
17 
18 #include <linux/types.h>
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/sysfs.h>
22 #include <linux/pci.h>
23 
24 #include "intel_th.h"
25 
26 #define DRIVER_NAME "intel_th_pci"
27 
28 #define BAR_MASK (BIT(TH_MMIO_CONFIG) | BIT(TH_MMIO_SW))
29 
30 static int intel_th_pci_probe(struct pci_dev *pdev,
31 			      const struct pci_device_id *id)
32 {
33 	struct intel_th *th;
34 	int err;
35 
36 	err = pcim_enable_device(pdev);
37 	if (err)
38 		return err;
39 
40 	err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
41 	if (err)
42 		return err;
43 
44 	th = intel_th_alloc(&pdev->dev, pdev->resource,
45 			    DEVICE_COUNT_RESOURCE, pdev->irq);
46 	if (IS_ERR(th))
47 		return PTR_ERR(th);
48 
49 	pci_set_drvdata(pdev, th);
50 
51 	return 0;
52 }
53 
54 static void intel_th_pci_remove(struct pci_dev *pdev)
55 {
56 	struct intel_th *th = pci_get_drvdata(pdev);
57 
58 	intel_th_free(th);
59 }
60 
61 static const struct pci_device_id intel_th_pci_id_table[] = {
62 	{
63 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
64 		.driver_data = (kernel_ulong_t)0,
65 	},
66 	{
67 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
68 		.driver_data = (kernel_ulong_t)0,
69 	},
70 	{ 0 },
71 };
72 
73 MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
74 
75 static struct pci_driver intel_th_pci_driver = {
76 	.name		= DRIVER_NAME,
77 	.id_table	= intel_th_pci_id_table,
78 	.probe		= intel_th_pci_probe,
79 	.remove		= intel_th_pci_remove,
80 };
81 
82 module_pci_driver(intel_th_pci_driver);
83 
84 MODULE_LICENSE("GPL v2");
85 MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
86 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
87