1 // SPDX-License-Identifier: GPL-2.0-only
2 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2
3 * by Eric Lammerts <eric@scintilla.utwente.nl>
5 * Based on radio-aztech.c. Original notes:
7 * Adapted to support the Video for Linux API by
8 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
12 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
13 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
14 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/ioport.h>
23 #include <linux/videodev2.h>
25 #include <linux/slab.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
28 #include "radio-isa.h"
30 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
31 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
32 MODULE_LICENSE("GPL");
33 MODULE_VERSION("0.1.99");
35 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
37 #ifndef CONFIG_RADIO_TRUST_PORT
38 #define CONFIG_RADIO_TRUST_PORT -1
43 static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT,
44 [1 ... (TRUST_MAX - 1)] = -1 };
45 static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 };
47 module_param_array(io, int, NULL, 0444);
48 MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)");
49 module_param_array(radio_nr, int, NULL, 0444);
50 MODULE_PARM_DESC(radio_nr, "Radio device numbers");
53 struct radio_isa_card isa;
57 static struct radio_isa_card *trust_alloc(void)
59 struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL);
61 return tr ? &tr->isa : NULL;
65 #define TDA7318_ADDR 0x88
66 #define TSA6060T_ADDR 0xc4
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)
74 static void write_i2c(struct trust *tr, int n, ...)
76 unsigned char val, mask;
90 val = va_arg(args, unsigned);
91 for (mask = 0x80; mask; mask >>= 1) {
101 /* acknowledge bit */
120 static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
122 struct trust *tr = container_of(isa, struct trust, isa);
124 tr->ioval = (tr->ioval & 0xf7) | (mute << 3);
125 outb(tr->ioval, isa->io);
126 write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f);
130 static int trust_s_stereo(struct radio_isa_card *isa, bool stereo)
132 struct trust *tr = container_of(isa, struct trust, isa);
134 tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2);
135 outb(tr->ioval, isa->io);
139 static u32 trust_g_signal(struct radio_isa_card *isa)
143 for (i = 0, v = 0; i < 100; i++)
145 return (v & 1) ? 0 : 0xffff;
148 static int trust_s_frequency(struct radio_isa_card *isa, u32 freq)
150 struct trust *tr = container_of(isa, struct trust, isa);
152 freq /= 160; /* Convert to 10 kHz units */
153 freq += 1070; /* Add 10.7 MHz IF */
154 write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1,
155 freq >> 7, 0x60 | ((freq >> 15) & 1), 0);
159 static int basstreble2chip[15] = {
160 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
163 static int trust_s_ctrl(struct v4l2_ctrl *ctrl)
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);
170 case V4L2_CID_AUDIO_BASS:
171 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]);
173 case V4L2_CID_AUDIO_TREBLE:
174 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]);
180 static const struct v4l2_ctrl_ops trust_ctrl_ops = {
181 .s_ctrl = trust_s_ctrl,
184 static int trust_initialize(struct radio_isa_card *isa)
186 struct trust *tr = container_of(isa, struct trust, isa);
189 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
190 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
191 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
192 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
193 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
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;
202 static 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,
211 static const int trust_ioports[] = { 0x350, 0x358 };
213 static struct radio_isa_driver trust_driver = {
215 .match = radio_isa_match,
216 .probe = radio_isa_probe,
217 .remove = radio_isa_remove,
219 .name = "radio-trust",
223 .radio_nr_params = radio_nr,
224 .io_ports = trust_ioports,
225 .num_of_io_ports = ARRAY_SIZE(trust_ioports),
227 .card = "Trust FM Radio",
233 static int __init trust_init(void)
235 return isa_register_driver(&trust_driver.driver, TRUST_MAX);
238 static void __exit trust_exit(void)
240 isa_unregister_driver(&trust_driver.driver);
243 module_init(trust_init);
244 module_exit(trust_exit);