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 <media/dmxdev.h>
38 #include <media/dvbdev.h>
39 #include <media/dvb_demux.h>
40 #include <media/dvb_frontend.h>
41 #include <media/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 
49 int 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 	return ret;
147 }
148 EXPORT_SYMBOL_GPL(mantis_pci_init);
149 
150 void mantis_pci_exit(struct mantis_pci *mantis)
151 {
152 	struct pci_dev *pdev = mantis->pdev;
153 
154 	dprintk(MANTIS_NOTICE, 1, " mem: 0x%p", mantis->mmio);
155 	free_irq(pdev->irq, mantis);
156 	if (mantis->mmio) {
157 		iounmap(mantis->mmio);
158 		release_mem_region(pci_resource_start(pdev, 0),
159 				   pci_resource_len(pdev, 0));
160 	}
161 
162 	pci_disable_device(pdev);
163 }
164 EXPORT_SYMBOL_GPL(mantis_pci_exit);
165 
166 MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
167 MODULE_AUTHOR("Manu Abraham");
168 MODULE_LICENSE("GPL");
169