1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 Mantis PCI bridge driver
4
5 Copyright (C) Manu Abraham (abraham.manu@gmail.com)
6
7 */
8
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/kernel.h>
12 #include <asm/io.h>
13 #include <asm/page.h>
14 #include <linux/kmod.h>
15 #include <linux/vmalloc.h>
16 #include <linux/init.h>
17 #include <linux/device.h>
18 #include <linux/pci.h>
19
20 #include <asm/irq.h>
21 #include <linux/signal.h>
22 #include <linux/sched.h>
23 #include <linux/interrupt.h>
24
25 #include <media/dmxdev.h>
26 #include <media/dvbdev.h>
27 #include <media/dvb_demux.h>
28 #include <media/dvb_frontend.h>
29 #include <media/dvb_net.h>
30
31 #include "mantis_common.h"
32 #include "mantis_reg.h"
33 #include "mantis_pci.h"
34
35 #define DRIVER_NAME "Mantis Core"
36
mantis_pci_init(struct mantis_pci * mantis)37 int mantis_pci_init(struct mantis_pci *mantis)
38 {
39 u8 latency;
40 struct mantis_hwconfig *config = mantis->hwconfig;
41 struct pci_dev *pdev = mantis->pdev;
42 int err, ret = 0;
43
44 dprintk(MANTIS_ERROR, 0, "found a %s PCI %s device on (%02x:%02x.%x),\n",
45 config->model_name,
46 config->dev_type,
47 mantis->pdev->bus->number,
48 PCI_SLOT(mantis->pdev->devfn),
49 PCI_FUNC(mantis->pdev->devfn));
50
51 err = pci_enable_device(pdev);
52 if (err != 0) {
53 ret = -ENODEV;
54 dprintk(MANTIS_ERROR, 1, "ERROR: PCI enable failed <%i>", err);
55 goto fail0;
56 }
57
58 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
59 if (err != 0) {
60 dprintk(MANTIS_ERROR, 1, "ERROR: Unable to obtain 32 bit DMA <%i>", err);
61 ret = -ENOMEM;
62 goto fail1;
63 }
64
65 pci_set_master(pdev);
66
67 if (!request_mem_region(pci_resource_start(pdev, 0),
68 pci_resource_len(pdev, 0),
69 DRIVER_NAME)) {
70
71 dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 Request failed !");
72 ret = -ENODEV;
73 goto fail1;
74 }
75
76 mantis->mmio = ioremap(pci_resource_start(pdev, 0),
77 pci_resource_len(pdev, 0));
78
79 if (!mantis->mmio) {
80 dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 remap failed !");
81 ret = -ENODEV;
82 goto fail2;
83 }
84
85 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency);
86 mantis->latency = latency;
87 mantis->revision = pdev->revision;
88
89 dprintk(MANTIS_ERROR, 0, " Mantis Rev %d [%04x:%04x], ",
90 mantis->revision,
91 mantis->pdev->subsystem_vendor,
92 mantis->pdev->subsystem_device);
93
94 dprintk(MANTIS_ERROR, 0,
95 "irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n",
96 mantis->pdev->irq,
97 mantis->latency,
98 mantis->mantis_addr,
99 mantis->mmio);
100
101 err = request_irq(pdev->irq,
102 config->irq_handler,
103 IRQF_SHARED,
104 DRIVER_NAME,
105 mantis);
106
107 if (err != 0) {
108
109 dprintk(MANTIS_ERROR, 1, "ERROR: IRQ registration failed ! <%d>", err);
110 ret = -ENODEV;
111 goto fail3;
112 }
113
114 pci_set_drvdata(pdev, mantis);
115 return ret;
116
117 /* Error conditions */
118 fail3:
119 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> I/O unmap", ret);
120 if (mantis->mmio)
121 iounmap(mantis->mmio);
122
123 fail2:
124 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> releasing regions", ret);
125 release_mem_region(pci_resource_start(pdev, 0),
126 pci_resource_len(pdev, 0));
127
128 fail1:
129 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> disabling device", ret);
130 pci_disable_device(pdev);
131
132 fail0:
133 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> exiting", ret);
134 return ret;
135 }
136 EXPORT_SYMBOL_GPL(mantis_pci_init);
137
mantis_pci_exit(struct mantis_pci * mantis)138 void mantis_pci_exit(struct mantis_pci *mantis)
139 {
140 struct pci_dev *pdev = mantis->pdev;
141
142 dprintk(MANTIS_NOTICE, 1, " mem: 0x%p", mantis->mmio);
143 free_irq(pdev->irq, mantis);
144 if (mantis->mmio) {
145 iounmap(mantis->mmio);
146 release_mem_region(pci_resource_start(pdev, 0),
147 pci_resource_len(pdev, 0));
148 }
149
150 pci_disable_device(pdev);
151 }
152 EXPORT_SYMBOL_GPL(mantis_pci_exit);
153
154 MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
155 MODULE_AUTHOR("Manu Abraham");
156 MODULE_LICENSE("GPL");
157