1 /*
2 Mantis PCI bridge driver
3
4 Copyright (C) Manu Abraham (abraham.manu@gmail.com)
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/kernel.h>
24 #include <asm/io.h>
25 #include <asm/page.h>
26 #include <linux/kmod.h>
27 #include <linux/vmalloc.h>
28 #include <linux/init.h>
29 #include <linux/device.h>
30 #include <linux/pci.h>
31
32 #include <asm/irq.h>
33 #include <linux/signal.h>
34 #include <linux/sched.h>
35 #include <linux/interrupt.h>
36
37 #include "dmxdev.h"
38 #include "dvbdev.h"
39 #include "dvb_demux.h"
40 #include "dvb_frontend.h"
41 #include "dvb_net.h"
42
43 #include "mantis_common.h"
44 #include "mantis_reg.h"
45 #include "mantis_pci.h"
46
47 #define DRIVER_NAME "Mantis Core"
48
mantis_pci_init(struct mantis_pci * mantis)49 int __devinit mantis_pci_init(struct mantis_pci *mantis)
50 {
51 u8 latency;
52 struct mantis_hwconfig *config = mantis->hwconfig;
53 struct pci_dev *pdev = mantis->pdev;
54 int err, ret = 0;
55
56 dprintk(MANTIS_ERROR, 0, "found a %s PCI %s device on (%02x:%02x.%x),\n",
57 config->model_name,
58 config->dev_type,
59 mantis->pdev->bus->number,
60 PCI_SLOT(mantis->pdev->devfn),
61 PCI_FUNC(mantis->pdev->devfn));
62
63 err = pci_enable_device(pdev);
64 if (err != 0) {
65 ret = -ENODEV;
66 dprintk(MANTIS_ERROR, 1, "ERROR: PCI enable failed <%i>", err);
67 goto fail0;
68 }
69
70 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
71 if (err != 0) {
72 dprintk(MANTIS_ERROR, 1, "ERROR: Unable to obtain 32 bit DMA <%i>", err);
73 ret = -ENOMEM;
74 goto fail1;
75 }
76
77 pci_set_master(pdev);
78
79 if (!request_mem_region(pci_resource_start(pdev, 0),
80 pci_resource_len(pdev, 0),
81 DRIVER_NAME)) {
82
83 dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 Request failed !");
84 ret = -ENODEV;
85 goto fail1;
86 }
87
88 mantis->mmio = ioremap(pci_resource_start(pdev, 0),
89 pci_resource_len(pdev, 0));
90
91 if (!mantis->mmio) {
92 dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 remap failed !");
93 ret = -ENODEV;
94 goto fail2;
95 }
96
97 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency);
98 mantis->latency = latency;
99 mantis->revision = pdev->revision;
100
101 dprintk(MANTIS_ERROR, 0, " Mantis Rev %d [%04x:%04x], ",
102 mantis->revision,
103 mantis->pdev->subsystem_vendor,
104 mantis->pdev->subsystem_device);
105
106 dprintk(MANTIS_ERROR, 0,
107 "irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n",
108 mantis->pdev->irq,
109 mantis->latency,
110 mantis->mantis_addr,
111 mantis->mmio);
112
113 err = request_irq(pdev->irq,
114 config->irq_handler,
115 IRQF_SHARED,
116 DRIVER_NAME,
117 mantis);
118
119 if (err != 0) {
120
121 dprintk(MANTIS_ERROR, 1, "ERROR: IRQ registration failed ! <%d>", err);
122 ret = -ENODEV;
123 goto fail3;
124 }
125
126 pci_set_drvdata(pdev, mantis);
127 return ret;
128
129 /* Error conditions */
130 fail3:
131 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> I/O unmap", ret);
132 if (mantis->mmio)
133 iounmap(mantis->mmio);
134
135 fail2:
136 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> releasing regions", ret);
137 release_mem_region(pci_resource_start(pdev, 0),
138 pci_resource_len(pdev, 0));
139
140 fail1:
141 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> disabling device", ret);
142 pci_disable_device(pdev);
143
144 fail0:
145 dprintk(MANTIS_ERROR, 1, "ERROR: <%d> exiting", ret);
146 pci_set_drvdata(pdev, NULL);
147 return ret;
148 }
149 EXPORT_SYMBOL_GPL(mantis_pci_init);
150
mantis_pci_exit(struct mantis_pci * mantis)151 void mantis_pci_exit(struct mantis_pci *mantis)
152 {
153 struct pci_dev *pdev = mantis->pdev;
154
155 dprintk(MANTIS_NOTICE, 1, " mem: 0x%p", mantis->mmio);
156 free_irq(pdev->irq, mantis);
157 if (mantis->mmio) {
158 iounmap(mantis->mmio);
159 release_mem_region(pci_resource_start(pdev, 0),
160 pci_resource_len(pdev, 0));
161 }
162
163 pci_disable_device(pdev);
164 pci_set_drvdata(pdev, NULL);
165 }
166 EXPORT_SYMBOL_GPL(mantis_pci_exit);
167
168 MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
169 MODULE_AUTHOR("Manu Abraham");
170 MODULE_LICENSE("GPL");
171