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bce5c2ea | 1 | // SPDX-License-Identifier: GPL-2.0 |
8f314cfc HK |
2 | /* |
3 | * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX). | |
4 | * See http://www.hilscher.com for details. | |
5 | * | |
318af55d | 6 | * (C) 2007 Hans J. Koch <hjk@hansjkoch.de> |
8f314cfc HK |
7 | * (C) 2008 Manuel Traut <manut@linutronix.de> |
8 | * | |
8f314cfc HK |
9 | */ |
10 | ||
11 | #include <linux/device.h> | |
12 | #include <linux/io.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/pci.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
8f314cfc HK |
16 | #include <linux/uio_driver.h> |
17 | ||
18 | #define PCI_VENDOR_ID_HILSCHER 0x15CF | |
19 | #define PCI_DEVICE_ID_HILSCHER_NETX 0x0000 | |
d8408aef DT |
20 | #define PCI_DEVICE_ID_HILSCHER_NETPLC 0x0010 |
21 | #define PCI_SUBDEVICE_ID_NETPLC_RAM 0x0000 | |
22 | #define PCI_SUBDEVICE_ID_NETPLC_FLASH 0x0001 | |
8f314cfc HK |
23 | #define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235 |
24 | #define PCI_SUBDEVICE_ID_NXPCA 0x3335 | |
25 | ||
26 | #define DPM_HOST_INT_EN0 0xfff0 | |
27 | #define DPM_HOST_INT_STAT0 0xffe0 | |
28 | ||
29 | #define DPM_HOST_INT_MASK 0xe600ffff | |
30 | #define DPM_HOST_INT_GLOBAL_EN 0x80000000 | |
31 | ||
32 | static irqreturn_t netx_handler(int irq, struct uio_info *dev_info) | |
33 | { | |
34 | void __iomem *int_enable_reg = dev_info->mem[0].internal_addr | |
35 | + DPM_HOST_INT_EN0; | |
36 | void __iomem *int_status_reg = dev_info->mem[0].internal_addr | |
37 | + DPM_HOST_INT_STAT0; | |
38 | ||
39 | /* Is one of our interrupts enabled and active ? */ | |
40 | if (!(ioread32(int_enable_reg) & ioread32(int_status_reg) | |
41 | & DPM_HOST_INT_MASK)) | |
42 | return IRQ_NONE; | |
43 | ||
44 | /* Disable interrupt */ | |
45 | iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN, | |
46 | int_enable_reg); | |
47 | return IRQ_HANDLED; | |
48 | } | |
49 | ||
b17b75bb | 50 | static int netx_pci_probe(struct pci_dev *dev, |
8f314cfc HK |
51 | const struct pci_device_id *id) |
52 | { | |
53 | struct uio_info *info; | |
54 | int bar; | |
55 | ||
c3a74779 | 56 | info = devm_kzalloc(&dev->dev, sizeof(struct uio_info), GFP_KERNEL); |
8f314cfc HK |
57 | if (!info) |
58 | return -ENOMEM; | |
59 | ||
60 | if (pci_enable_device(dev)) | |
c3a74779 | 61 | return -ENODEV; |
8f314cfc HK |
62 | |
63 | if (pci_request_regions(dev, "netx")) | |
64 | goto out_disable; | |
65 | ||
66 | switch (id->device) { | |
67 | case PCI_DEVICE_ID_HILSCHER_NETX: | |
68 | bar = 0; | |
69 | info->name = "netx"; | |
70 | break; | |
d8408aef DT |
71 | case PCI_DEVICE_ID_HILSCHER_NETPLC: |
72 | bar = 0; | |
73 | info->name = "netplc"; | |
74 | break; | |
8f314cfc HK |
75 | default: |
76 | bar = 2; | |
77 | info->name = "netx_plx"; | |
78 | } | |
79 | ||
80 | /* BAR0 or 2 points to the card's dual port memory */ | |
81 | info->mem[0].addr = pci_resource_start(dev, bar); | |
82 | if (!info->mem[0].addr) | |
83 | goto out_release; | |
84 | info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar), | |
85 | pci_resource_len(dev, bar)); | |
86 | ||
87 | if (!info->mem[0].internal_addr) | |
88 | goto out_release; | |
89 | ||
90 | info->mem[0].size = pci_resource_len(dev, bar); | |
91 | info->mem[0].memtype = UIO_MEM_PHYS; | |
92 | info->irq = dev->irq; | |
93 | info->irq_flags = IRQF_SHARED; | |
94 | info->handler = netx_handler; | |
95 | info->version = "0.0.1"; | |
96 | ||
97 | /* Make sure all interrupts are disabled */ | |
98 | iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0); | |
99 | ||
100 | if (uio_register_device(&dev->dev, info)) | |
101 | goto out_unmap; | |
102 | ||
103 | pci_set_drvdata(dev, info); | |
104 | dev_info(&dev->dev, "Found %s card, registered UIO device.\n", | |
105 | info->name); | |
106 | ||
107 | return 0; | |
108 | ||
109 | out_unmap: | |
110 | iounmap(info->mem[0].internal_addr); | |
111 | out_release: | |
112 | pci_release_regions(dev); | |
113 | out_disable: | |
114 | pci_disable_device(dev); | |
8f314cfc HK |
115 | return -ENODEV; |
116 | } | |
117 | ||
118 | static void netx_pci_remove(struct pci_dev *dev) | |
119 | { | |
120 | struct uio_info *info = pci_get_drvdata(dev); | |
121 | ||
122 | /* Disable all interrupts */ | |
123 | iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0); | |
124 | uio_unregister_device(info); | |
125 | pci_release_regions(dev); | |
126 | pci_disable_device(dev); | |
8f314cfc | 127 | iounmap(info->mem[0].internal_addr); |
8f314cfc HK |
128 | } |
129 | ||
130 | static struct pci_device_id netx_pci_ids[] = { | |
131 | { | |
132 | .vendor = PCI_VENDOR_ID_HILSCHER, | |
133 | .device = PCI_DEVICE_ID_HILSCHER_NETX, | |
134 | .subvendor = 0, | |
135 | .subdevice = 0, | |
136 | }, | |
d8408aef DT |
137 | { |
138 | .vendor = PCI_VENDOR_ID_HILSCHER, | |
139 | .device = PCI_DEVICE_ID_HILSCHER_NETPLC, | |
140 | .subvendor = PCI_VENDOR_ID_HILSCHER, | |
141 | .subdevice = PCI_SUBDEVICE_ID_NETPLC_RAM, | |
142 | }, | |
143 | { | |
144 | .vendor = PCI_VENDOR_ID_HILSCHER, | |
145 | .device = PCI_DEVICE_ID_HILSCHER_NETPLC, | |
146 | .subvendor = PCI_VENDOR_ID_HILSCHER, | |
147 | .subdevice = PCI_SUBDEVICE_ID_NETPLC_FLASH, | |
148 | }, | |
8f314cfc HK |
149 | { |
150 | .vendor = PCI_VENDOR_ID_PLX, | |
151 | .device = PCI_DEVICE_ID_PLX_9030, | |
152 | .subvendor = PCI_VENDOR_ID_PLX, | |
153 | .subdevice = PCI_SUBDEVICE_ID_NXSB_PCA, | |
154 | }, | |
155 | { | |
156 | .vendor = PCI_VENDOR_ID_PLX, | |
157 | .device = PCI_DEVICE_ID_PLX_9030, | |
158 | .subvendor = PCI_VENDOR_ID_PLX, | |
159 | .subdevice = PCI_SUBDEVICE_ID_NXPCA, | |
160 | }, | |
161 | { 0, } | |
162 | }; | |
163 | ||
164 | static struct pci_driver netx_pci_driver = { | |
165 | .name = "netx", | |
166 | .id_table = netx_pci_ids, | |
167 | .probe = netx_pci_probe, | |
168 | .remove = netx_pci_remove, | |
169 | }; | |
170 | ||
b59f9a05 | 171 | module_pci_driver(netx_pci_driver); |
8f314cfc HK |
172 | MODULE_DEVICE_TABLE(pci, netx_pci_ids); |
173 | MODULE_LICENSE("GPL v2"); | |
174 | MODULE_AUTHOR("Hans J. Koch, Manuel Traut"); |