1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * bdc_pci.c - BRCM BDC USB3.0 device controller PCI interface file.
4 *
5 * Copyright (C) 2014 Broadcom Corporation
6 *
7 * Author: Ashwini Pahuja
8 *
9 * Based on drivers under drivers/usb/
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/pci.h>
16 #include <linux/pci_ids.h>
17 #include <linux/platform_device.h>
18
19 #include "bdc.h"
20
21 #define BDC_PCI_PID 0x1570
22
23 struct bdc_pci {
24 struct device *dev;
25 struct platform_device *bdc;
26 };
27
bdc_setup_msi(struct pci_dev * pci)28 static int bdc_setup_msi(struct pci_dev *pci)
29 {
30 int ret;
31
32 ret = pci_enable_msi(pci);
33 if (ret) {
34 pr_err("failed to allocate MSI entry\n");
35 return ret;
36 }
37
38 return ret;
39 }
40
bdc_pci_probe(struct pci_dev * pci,const struct pci_device_id * id)41 static int bdc_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
42 {
43 struct resource res[2];
44 struct platform_device *bdc;
45 struct bdc_pci *glue;
46 int ret = -ENOMEM;
47
48 glue = devm_kzalloc(&pci->dev, sizeof(*glue), GFP_KERNEL);
49 if (!glue)
50 return -ENOMEM;
51
52 glue->dev = &pci->dev;
53 ret = pci_enable_device(pci);
54 if (ret) {
55 dev_err(&pci->dev, "failed to enable pci device\n");
56 return -ENODEV;
57 }
58 pci_set_master(pci);
59
60 bdc = platform_device_alloc(BRCM_BDC_NAME, PLATFORM_DEVID_AUTO);
61 if (!bdc)
62 return -ENOMEM;
63
64 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
65 bdc_setup_msi(pci);
66
67 res[0].start = pci_resource_start(pci, 0);
68 res[0].end = pci_resource_end(pci, 0);
69 res[0].name = BRCM_BDC_NAME;
70 res[0].flags = IORESOURCE_MEM;
71
72 res[1].start = pci->irq;
73 res[1].name = BRCM_BDC_NAME;
74 res[1].flags = IORESOURCE_IRQ;
75
76 ret = platform_device_add_resources(bdc, res, ARRAY_SIZE(res));
77 if (ret) {
78 dev_err(&pci->dev,
79 "couldn't add resources to bdc device\n");
80 platform_device_put(bdc);
81 return ret;
82 }
83
84 pci_set_drvdata(pci, glue);
85
86 dma_set_coherent_mask(&bdc->dev, pci->dev.coherent_dma_mask);
87
88 bdc->dev.dma_mask = pci->dev.dma_mask;
89 bdc->dev.dma_parms = pci->dev.dma_parms;
90 bdc->dev.parent = &pci->dev;
91 glue->bdc = bdc;
92
93 ret = platform_device_add(bdc);
94 if (ret) {
95 dev_err(&pci->dev, "failed to register bdc device\n");
96 platform_device_put(bdc);
97 return ret;
98 }
99
100 return 0;
101 }
102
bdc_pci_remove(struct pci_dev * pci)103 static void bdc_pci_remove(struct pci_dev *pci)
104 {
105 struct bdc_pci *glue = pci_get_drvdata(pci);
106
107 platform_device_unregister(glue->bdc);
108 pci_disable_msi(pci);
109 }
110
111 static struct pci_device_id bdc_pci_id_table[] = {
112 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BDC_PCI_PID), },
113 {} /* Terminating Entry */
114 };
115
116 MODULE_DEVICE_TABLE(pci, bdc_pci_id_table);
117
118 static struct pci_driver bdc_pci_driver = {
119 .name = "bdc-pci",
120 .id_table = bdc_pci_id_table,
121 .probe = bdc_pci_probe,
122 .remove = bdc_pci_remove,
123 };
124
125 MODULE_AUTHOR("Ashwini Pahuja <ashwini.linux@gmail.com>");
126 MODULE_LICENSE("GPL");
127 MODULE_DESCRIPTION("BRCM BDC USB3 PCI Glue layer");
128 module_pci_driver(bdc_pci_driver);
129