1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
* (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
*
* Based in the radio Maestro PCI driver. Actually it uses the same chip
* for radio but different pci controller.
*
* I didn't have any specs I reversed engineered the protocol from
* the windows driver (radio.dll).
*
* The card uses the TEA5757 chip that includes a search function but it
* is useless as I haven't found any way to read back the frequency. If
* anybody does please mail me.
*
* For the pdf file see:
* http://www.nxp.com/acrobat_download2/expired_datasheets/TEA5757_5759_3.pdf
*
*
* CHANGES:
* 0.75b
* - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
*
* 0.75 Sun Feb 4 22:51:27 EET 2001
* - tiding up
* - removed support for multiple devices as it didn't work anyway
*
* BUGS:
* - card unmutes if you change frequency
*
* (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@kernel.org>:
* - Conversion to V4L2 API
* - Uses video_ioctl2 for parsing and to add debug support
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/videodev2.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <media/drv-intf/tea575x.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000.");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");
static int radio_nr = -1;
module_param(radio_nr, int, 0644);
MODULE_PARM_DESC(radio_nr, "Radio device number");
/* TEA5757 pin mappings */
static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;
static atomic_t maxiradio_instance = ATOMIC_INIT(0);
#define PCI_VENDOR_ID_GUILLEMOT 0x5046
#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
struct maxiradio
{
struct snd_tea575x tea;
struct v4l2_device v4l2_dev;
struct pci_dev *pdev;
u16 io; /* base of radio io */
};
static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
{
return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
}
static void maxiradio_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)
{
struct maxiradio *dev = tea->private_data;
u8 bits = 0;
bits |= (pins & TEA575X_DATA) ? data : 0;
bits |= (pins & TEA575X_CLK) ? clk : 0;
bits |= (pins & TEA575X_WREN) ? wren : 0;
bits |= power;
outb(bits, dev->io);
}
/* Note: this card cannot read out the data of the shift registers,
only the mono/stereo pin works. */
static u8 maxiradio_tea575x_get_pins(struct snd_tea575x *tea)
{
struct maxiradio *dev = tea->private_data;
u8 bits = inb(dev->io);
return ((bits & data) ? TEA575X_DATA : 0) |
((bits & mo_st) ? TEA575X_MOST : 0);
}
static void maxiradio_tea575x_set_direction(struct snd_tea575x *tea, bool output)
{
}
static const struct snd_tea575x_ops maxiradio_tea_ops = {
.set_pins = maxiradio_tea575x_set_pins,
.get_pins = maxiradio_tea575x_get_pins,
.set_direction = maxiradio_tea575x_set_direction,
};
static int maxiradio_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct maxiradio *dev;
struct v4l2_device *v4l2_dev;
int retval = -ENOMEM;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
dev_err(&pdev->dev, "not enough memory\n");
return -ENOMEM;
}
v4l2_dev = &dev->v4l2_dev;
v4l2_device_set_name(v4l2_dev, "maxiradio", &maxiradio_instance);
retval = v4l2_device_register(&pdev->dev, v4l2_dev);
if (retval < 0) {
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
goto errfr;
}
dev->tea.private_data = dev;
dev->tea.ops = &maxiradio_tea_ops;
/* The data pin cannot be read. This may be a hardware limitation, or
we just don't know how to read it. */
dev->tea.cannot_read_data = true;
dev->tea.v4l2_dev = v4l2_dev;
dev->tea.radio_nr = radio_nr;
strscpy(dev->tea.card, "Maxi Radio FM2000", sizeof(dev->tea.card));
snprintf(dev->tea.bus_info, sizeof(dev->tea.bus_info),
"PCI:%s", pci_name(pdev));
retval = -ENODEV;
if (!request_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0), v4l2_dev->name)) {
dev_err(&pdev->dev, "can't reserve I/O ports\n");
goto err_hdl;
}
if (pci_enable_device(pdev))
goto err_out_free_region;
dev->io = pci_resource_start(pdev, 0);
if (snd_tea575x_init(&dev->tea, THIS_MODULE)) {
printk(KERN_ERR "radio-maxiradio: Unable to detect TEA575x tuner\n");
goto err_out_free_region;
}
return 0;
err_out_free_region:
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
err_hdl:
v4l2_device_unregister(v4l2_dev);
errfr:
kfree(dev);
return retval;
}
static void maxiradio_remove(struct pci_dev *pdev)
{
struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
struct maxiradio *dev = to_maxiradio(v4l2_dev);
snd_tea575x_exit(&dev->tea);
/* Turn off power */
outb(0, dev->io);
v4l2_device_unregister(v4l2_dev);
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
kfree(dev);
}
static const struct pci_device_id maxiradio_pci_tbl[] = {
{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
PCI_ANY_ID, PCI_ANY_ID, },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
static struct pci_driver maxiradio_driver = {
.name = "radio-maxiradio",
.id_table = maxiradio_pci_tbl,
.probe = maxiradio_probe,
.remove = maxiradio_remove,
};
module_pci_driver(maxiradio_driver);
|
