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
49int 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 */
130fail3:
131	dprintk(MANTIS_ERROR, 1, "ERROR: <%d> I/O unmap", ret);
132	if (mantis->mmio)
133		iounmap(mantis->mmio);
134
135fail2:
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
140fail1:
141	dprintk(MANTIS_ERROR, 1, "ERROR: <%d> disabling device", ret);
142	pci_disable_device(pdev);
143
144fail0:
145	dprintk(MANTIS_ERROR, 1, "ERROR: <%d> exiting", ret);
146	return ret;
147}
148EXPORT_SYMBOL_GPL(mantis_pci_init);
149
150void 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}
164EXPORT_SYMBOL_GPL(mantis_pci_exit);
165
166MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
167MODULE_AUTHOR("Manu Abraham");
168MODULE_LICENSE("GPL");
169