1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * UIO Hilscher CIF card driver |
4 | * |
5 | * (C) 2007 Hans J. Koch <hjk@hansjkoch.de> |
6 | * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de> |
7 | */ |
8 | |
9 | #include <linux/device.h> |
10 | #include <linux/module.h> |
11 | #include <linux/pci.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/uio_driver.h> |
14 | |
15 | #include <asm/io.h> |
16 | |
17 | #define PLX9030_INTCSR 0x4C |
18 | #define INTSCR_INT1_ENABLE 0x01 |
19 | #define INTSCR_INT1_STATUS 0x04 |
20 | #define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS) |
21 | |
22 | #define PCI_SUBVENDOR_ID_PEP 0x1518 |
23 | #define CIF_SUBDEVICE_PROFIBUS 0x430 |
24 | #define CIF_SUBDEVICE_DEVICENET 0x432 |
25 | |
26 | |
27 | static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info) |
28 | { |
29 | void __iomem *plx_intscr = dev_info->mem[0].internal_addr |
30 | + PLX9030_INTCSR; |
31 | |
32 | if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE) |
33 | != INT1_ENABLED_AND_ACTIVE) |
34 | return IRQ_NONE; |
35 | |
36 | /* Disable interrupt */ |
37 | iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr); |
38 | return IRQ_HANDLED; |
39 | } |
40 | |
41 | static int hilscher_pci_probe(struct pci_dev *dev, |
42 | const struct pci_device_id *id) |
43 | { |
44 | struct uio_info *info; |
45 | |
46 | info = devm_kzalloc(dev: &dev->dev, size: sizeof(struct uio_info), GFP_KERNEL); |
47 | if (!info) |
48 | return -ENOMEM; |
49 | |
50 | if (pci_enable_device(dev)) |
51 | return -ENODEV; |
52 | |
53 | if (pci_request_regions(dev, "hilscher" )) |
54 | goto out_disable; |
55 | |
56 | info->mem[0].addr = pci_resource_start(dev, 0); |
57 | if (!info->mem[0].addr) |
58 | goto out_release; |
59 | info->mem[0].internal_addr = pci_ioremap_bar(pdev: dev, bar: 0); |
60 | if (!info->mem[0].internal_addr) |
61 | goto out_release; |
62 | |
63 | info->mem[0].size = pci_resource_len(dev, 0); |
64 | info->mem[0].memtype = UIO_MEM_PHYS; |
65 | info->mem[1].addr = pci_resource_start(dev, 2); |
66 | info->mem[1].size = pci_resource_len(dev, 2); |
67 | info->mem[1].memtype = UIO_MEM_PHYS; |
68 | switch (id->subdevice) { |
69 | case CIF_SUBDEVICE_PROFIBUS: |
70 | info->name = "CIF_Profibus" ; |
71 | break; |
72 | case CIF_SUBDEVICE_DEVICENET: |
73 | info->name = "CIF_Devicenet" ; |
74 | break; |
75 | default: |
76 | info->name = "CIF_???" ; |
77 | } |
78 | info->version = "0.0.1" ; |
79 | info->irq = dev->irq; |
80 | info->irq_flags = IRQF_SHARED; |
81 | info->handler = hilscher_handler; |
82 | |
83 | if (uio_register_device(&dev->dev, info)) |
84 | goto out_unmap; |
85 | |
86 | pci_set_drvdata(pdev: dev, data: info); |
87 | |
88 | return 0; |
89 | out_unmap: |
90 | iounmap(addr: info->mem[0].internal_addr); |
91 | out_release: |
92 | pci_release_regions(dev); |
93 | out_disable: |
94 | pci_disable_device(dev); |
95 | return -ENODEV; |
96 | } |
97 | |
98 | static void hilscher_pci_remove(struct pci_dev *dev) |
99 | { |
100 | struct uio_info *info = pci_get_drvdata(pdev: dev); |
101 | |
102 | uio_unregister_device(info); |
103 | pci_release_regions(dev); |
104 | pci_disable_device(dev); |
105 | iounmap(addr: info->mem[0].internal_addr); |
106 | } |
107 | |
108 | static struct pci_device_id hilscher_pci_ids[] = { |
109 | { |
110 | .vendor = PCI_VENDOR_ID_PLX, |
111 | .device = PCI_DEVICE_ID_PLX_9030, |
112 | .subvendor = PCI_SUBVENDOR_ID_PEP, |
113 | .subdevice = CIF_SUBDEVICE_PROFIBUS, |
114 | }, |
115 | { |
116 | .vendor = PCI_VENDOR_ID_PLX, |
117 | .device = PCI_DEVICE_ID_PLX_9030, |
118 | .subvendor = PCI_SUBVENDOR_ID_PEP, |
119 | .subdevice = CIF_SUBDEVICE_DEVICENET, |
120 | }, |
121 | { 0, } |
122 | }; |
123 | |
124 | static struct pci_driver hilscher_pci_driver = { |
125 | .name = "hilscher" , |
126 | .id_table = hilscher_pci_ids, |
127 | .probe = hilscher_pci_probe, |
128 | .remove = hilscher_pci_remove, |
129 | }; |
130 | |
131 | module_pci_driver(hilscher_pci_driver); |
132 | MODULE_DEVICE_TABLE(pci, hilscher_pci_ids); |
133 | MODULE_LICENSE("GPL v2" ); |
134 | MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger" ); |
135 | |