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19#include <stdarg.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/ioport.h>
23#include <linux/videodev2.h>
24#include <linux/io.h>
25#include <linux/slab.h>
26#include <media/v4l2-device.h>
27#include <media/v4l2-ioctl.h>
28#include "radio-isa.h"
29
30MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
31MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
32MODULE_LICENSE("GPL");
33MODULE_VERSION("0.1.99");
34
35
36
37#ifndef CONFIG_RADIO_TRUST_PORT
38#define CONFIG_RADIO_TRUST_PORT -1
39#endif
40
41#define TRUST_MAX 2
42
43static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT,
44 [1 ... (TRUST_MAX - 1)] = -1 };
45static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 };
46
47module_param_array(io, int, NULL, 0444);
48MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)");
49module_param_array(radio_nr, int, NULL, 0444);
50MODULE_PARM_DESC(radio_nr, "Radio device numbers");
51
52struct trust {
53 struct radio_isa_card isa;
54 int ioval;
55};
56
57static struct radio_isa_card *trust_alloc(void)
58{
59 struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL);
60
61 return tr ? &tr->isa : NULL;
62}
63
64
65#define TDA7318_ADDR 0x88
66#define TSA6060T_ADDR 0xc4
67
68#define TR_DELAY do { inb(tr->isa.io); inb(tr->isa.io); inb(tr->isa.io); } while (0)
69#define TR_SET_SCL outb(tr->ioval |= 2, tr->isa.io)
70#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->isa.io)
71#define TR_SET_SDA outb(tr->ioval |= 1, tr->isa.io)
72#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->isa.io)
73
74static void write_i2c(struct trust *tr, int n, ...)
75{
76 unsigned char val, mask;
77 va_list args;
78
79 va_start(args, n);
80
81
82 TR_SET_SDA;
83 TR_SET_SCL;
84 TR_DELAY;
85 TR_CLR_SDA;
86 TR_CLR_SCL;
87 TR_DELAY;
88
89 for (; n; n--) {
90 val = va_arg(args, unsigned);
91 for (mask = 0x80; mask; mask >>= 1) {
92 if (val & mask)
93 TR_SET_SDA;
94 else
95 TR_CLR_SDA;
96 TR_SET_SCL;
97 TR_DELAY;
98 TR_CLR_SCL;
99 TR_DELAY;
100 }
101
102 TR_SET_SDA;
103 TR_SET_SCL;
104 TR_DELAY;
105 TR_CLR_SCL;
106 TR_DELAY;
107 }
108
109
110 TR_CLR_SDA;
111 TR_DELAY;
112 TR_SET_SCL;
113 TR_DELAY;
114 TR_SET_SDA;
115 TR_DELAY;
116
117 va_end(args);
118}
119
120static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
121{
122 struct trust *tr = container_of(isa, struct trust, isa);
123
124 tr->ioval = (tr->ioval & 0xf7) | (mute << 3);
125 outb(tr->ioval, isa->io);
126 write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f);
127 return 0;
128}
129
130static int trust_s_stereo(struct radio_isa_card *isa, bool stereo)
131{
132 struct trust *tr = container_of(isa, struct trust, isa);
133
134 tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2);
135 outb(tr->ioval, isa->io);
136 return 0;
137}
138
139static u32 trust_g_signal(struct radio_isa_card *isa)
140{
141 int i, v;
142
143 for (i = 0, v = 0; i < 100; i++)
144 v |= inb(isa->io);
145 return (v & 1) ? 0 : 0xffff;
146}
147
148static int trust_s_frequency(struct radio_isa_card *isa, u32 freq)
149{
150 struct trust *tr = container_of(isa, struct trust, isa);
151
152 freq /= 160;
153 freq += 1070;
154 write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1,
155 freq >> 7, 0x60 | ((freq >> 15) & 1), 0);
156 return 0;
157}
158
159static int basstreble2chip[15] = {
160 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
161};
162
163static int trust_s_ctrl(struct v4l2_ctrl *ctrl)
164{
165 struct radio_isa_card *isa =
166 container_of(ctrl->handler, struct radio_isa_card, hdl);
167 struct trust *tr = container_of(isa, struct trust, isa);
168
169 switch (ctrl->id) {
170 case V4L2_CID_AUDIO_BASS:
171 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]);
172 return 0;
173 case V4L2_CID_AUDIO_TREBLE:
174 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]);
175 return 0;
176 }
177 return -EINVAL;
178}
179
180static const struct v4l2_ctrl_ops trust_ctrl_ops = {
181 .s_ctrl = trust_s_ctrl,
182};
183
184static int trust_initialize(struct radio_isa_card *isa)
185{
186 struct trust *tr = container_of(isa, struct trust, isa);
187
188 tr->ioval = 0xf;
189 write_i2c(tr, 2, TDA7318_ADDR, 0x80);
190 write_i2c(tr, 2, TDA7318_ADDR, 0xa0);
191 write_i2c(tr, 2, TDA7318_ADDR, 0xc0);
192 write_i2c(tr, 2, TDA7318_ADDR, 0xe0);
193 write_i2c(tr, 2, TDA7318_ADDR, 0x40);
194
195 v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,
196 V4L2_CID_AUDIO_BASS, 0, 15, 1, 8);
197 v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,
198 V4L2_CID_AUDIO_TREBLE, 0, 15, 1, 8);
199 return isa->hdl.error;
200}
201
202static const struct radio_isa_ops trust_ops = {
203 .init = trust_initialize,
204 .alloc = trust_alloc,
205 .s_mute_volume = trust_s_mute_volume,
206 .s_frequency = trust_s_frequency,
207 .s_stereo = trust_s_stereo,
208 .g_signal = trust_g_signal,
209};
210
211static const int trust_ioports[] = { 0x350, 0x358 };
212
213static struct radio_isa_driver trust_driver = {
214 .driver = {
215 .match = radio_isa_match,
216 .probe = radio_isa_probe,
217 .remove = radio_isa_remove,
218 .driver = {
219 .name = "radio-trust",
220 },
221 },
222 .io_params = io,
223 .radio_nr_params = radio_nr,
224 .io_ports = trust_ioports,
225 .num_of_io_ports = ARRAY_SIZE(trust_ioports),
226 .region_size = 2,
227 .card = "Trust FM Radio",
228 .ops = &trust_ops,
229 .has_stereo = true,
230 .max_volume = 31,
231};
232
233static int __init trust_init(void)
234{
235 return isa_register_driver(&trust_driver.driver, TRUST_MAX);
236}
237
238static void __exit trust_exit(void)
239{
240 isa_unregister_driver(&trust_driver.driver);
241}
242
243module_init(trust_init);
244module_exit(trust_exit);
245
