1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * comedi/drivers/ni_labpc_pci.c
4 * Driver for National Instruments Lab-PC PCI-1200
5 * Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
6 */
7
8 /*
9 * Driver: ni_labpc_pci
10 * Description: National Instruments Lab-PC PCI-1200
11 * Devices: [National Instruments] PCI-1200 (ni_pci-1200)
12 * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
13 * Status: works
14 *
15 * This is the PCI-specific support split off from the ni_labpc driver.
16 *
17 * Configuration Options: not applicable, uses PCI auto config
18 *
19 * NI manuals:
20 * 340914a (pci-1200)
21 */
22
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/comedi/comedi_pci.h>
26
27 #include "ni_labpc.h"
28
29 enum labpc_pci_boardid {
30 BOARD_NI_PCI1200,
31 };
32
33 static const struct labpc_boardinfo labpc_pci_boards[] = {
34 [BOARD_NI_PCI1200] = {
35 .name = "ni_pci-1200",
36 .ai_speed = 10000,
37 .ai_scan_up = 1,
38 .has_ao = 1,
39 .is_labpc1200 = 1,
40 },
41 };
42
43 /* ripped from mite.h and mite_setup2() to avoid mite dependency */
44 #define MITE_IODWBSR 0xc0 /* IO Device Window Base Size Register */
45 #define WENAB BIT(7) /* window enable */
46
labpc_pci_mite_init(struct pci_dev * pcidev)47 static int labpc_pci_mite_init(struct pci_dev *pcidev)
48 {
49 void __iomem *mite_base;
50 u32 main_phys_addr;
51
52 /* ioremap the MITE registers (BAR 0) temporarily */
53 mite_base = pci_ioremap_bar(pcidev, 0);
54 if (!mite_base)
55 return -ENOMEM;
56
57 /* set data window to main registers (BAR 1) */
58 main_phys_addr = pci_resource_start(pcidev, 1);
59 writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
60
61 /* finished with MITE registers */
62 iounmap(mite_base);
63 return 0;
64 }
65
labpc_pci_auto_attach(struct comedi_device * dev,unsigned long context)66 static int labpc_pci_auto_attach(struct comedi_device *dev,
67 unsigned long context)
68 {
69 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
70 const struct labpc_boardinfo *board = NULL;
71 int ret;
72
73 if (context < ARRAY_SIZE(labpc_pci_boards))
74 board = &labpc_pci_boards[context];
75 if (!board)
76 return -ENODEV;
77 dev->board_ptr = board;
78 dev->board_name = board->name;
79
80 ret = comedi_pci_enable(dev);
81 if (ret)
82 return ret;
83
84 ret = labpc_pci_mite_init(pcidev);
85 if (ret)
86 return ret;
87
88 dev->mmio = pci_ioremap_bar(pcidev, 1);
89 if (!dev->mmio)
90 return -ENOMEM;
91
92 return labpc_common_attach(dev, pcidev->irq, IRQF_SHARED);
93 }
94
labpc_pci_detach(struct comedi_device * dev)95 static void labpc_pci_detach(struct comedi_device *dev)
96 {
97 labpc_common_detach(dev);
98 comedi_pci_detach(dev);
99 }
100
101 static struct comedi_driver labpc_pci_comedi_driver = {
102 .driver_name = "labpc_pci",
103 .module = THIS_MODULE,
104 .auto_attach = labpc_pci_auto_attach,
105 .detach = labpc_pci_detach,
106 };
107
108 static const struct pci_device_id labpc_pci_table[] = {
109 { PCI_VDEVICE(NI, 0x161), BOARD_NI_PCI1200 },
110 { 0 }
111 };
112 MODULE_DEVICE_TABLE(pci, labpc_pci_table);
113
labpc_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)114 static int labpc_pci_probe(struct pci_dev *dev,
115 const struct pci_device_id *id)
116 {
117 return comedi_pci_auto_config(dev, &labpc_pci_comedi_driver,
118 id->driver_data);
119 }
120
121 static struct pci_driver labpc_pci_driver = {
122 .name = "labpc_pci",
123 .id_table = labpc_pci_table,
124 .probe = labpc_pci_probe,
125 .remove = comedi_pci_auto_unconfig,
126 };
127 module_comedi_pci_driver(labpc_pci_comedi_driver, labpc_pci_driver);
128
129 MODULE_DESCRIPTION("Comedi: National Instruments Lab-PC PCI-1200 driver");
130 MODULE_AUTHOR("Comedi https://www.comedi.org");
131 MODULE_LICENSE("GPL");
132