1 /* SF16-FMR2 radio driver for Linux
2 * Copyright (c) 2011 Ondrej Zary
4 * Original driver was (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
5 * but almost nothing remained here after conversion to generic TEA575x
9 #include <linux/delay.h>
10 #include <linux/module.h> /* Modules */
11 #include <linux/init.h> /* Initdata */
12 #include <linux/ioport.h> /* request_region */
13 #include <linux/io.h> /* outb, outb_p */
14 #include <sound/tea575x-tuner.h>
16 MODULE_AUTHOR("Ondrej Zary");
17 MODULE_DESCRIPTION("MediaForte SF16-FMR2 FM radio card driver");
18 MODULE_LICENSE("GPL");
22 struct snd_tea575x tea;
23 struct v4l2_ctrl *volume;
24 struct v4l2_ctrl *balance;
27 /* the port is hardwired so no need to support multiple cards */
28 #define FMR2_PORT 0x384
29 static struct fmr2 fmr2_card;
31 /* TEA575x tuner pins */
32 #define STR_DATA (1 << 0)
33 #define STR_CLK (1 << 1)
34 #define STR_WREN (1 << 2)
35 #define STR_MOST (1 << 3)
36 /* PT2254A/TC9154A volume control pins */
37 #define PT_ST (1 << 4)
38 #define PT_CK (1 << 5)
39 #define PT_DATA (1 << 6)
40 /* volume control presence pin */
41 #define FMR2_HASVOL (1 << 7)
43 static void fmr2_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)
45 struct fmr2 *fmr2 = tea->private_data;
48 bits |= (pins & TEA575X_DATA) ? STR_DATA : 0;
49 bits |= (pins & TEA575X_CLK) ? STR_CLK : 0;
50 /* WRITE_ENABLE is inverted, DATA must be high during read */
51 bits |= (pins & TEA575X_WREN) ? 0 : STR_WREN | STR_DATA;
56 static u8 fmr2_tea575x_get_pins(struct snd_tea575x *tea)
58 struct fmr2 *fmr2 = tea->private_data;
59 u8 bits = inb(fmr2->io);
61 return (bits & STR_DATA) ? TEA575X_DATA : 0 |
62 (bits & STR_MOST) ? TEA575X_MOST : 0;
65 static void fmr2_tea575x_set_direction(struct snd_tea575x *tea, bool output)
69 static struct snd_tea575x_ops fmr2_tea_ops = {
70 .set_pins = fmr2_tea575x_set_pins,
71 .get_pins = fmr2_tea575x_get_pins,
72 .set_direction = fmr2_tea575x_set_direction,
75 /* TC9154A/PT2254A volume control */
77 /* 18-bit shift register bit definitions */
78 #define TC9154A_ATT_MAJ_0DB (1 << 0)
79 #define TC9154A_ATT_MAJ_10DB (1 << 1)
80 #define TC9154A_ATT_MAJ_20DB (1 << 2)
81 #define TC9154A_ATT_MAJ_30DB (1 << 3)
82 #define TC9154A_ATT_MAJ_40DB (1 << 4)
83 #define TC9154A_ATT_MAJ_50DB (1 << 5)
84 #define TC9154A_ATT_MAJ_60DB (1 << 6)
86 #define TC9154A_ATT_MIN_0DB (1 << 7)
87 #define TC9154A_ATT_MIN_2DB (1 << 8)
88 #define TC9154A_ATT_MIN_4DB (1 << 9)
89 #define TC9154A_ATT_MIN_6DB (1 << 10)
90 #define TC9154A_ATT_MIN_8DB (1 << 11)
91 /* bit 12 is ignored */
92 #define TC9154A_CHANNEL_LEFT (1 << 13)
93 #define TC9154A_CHANNEL_RIGHT (1 << 14)
94 /* bits 15, 16, 17 must be 0 */
96 #define TC9154A_ATT_MAJ(x) (1 << x)
97 #define TC9154A_ATT_MIN(x) (1 << (7 + x))
99 static void tc9154a_set_pins(struct fmr2 *fmr2, u8 pins)
104 outb(pins, fmr2->io);
107 static void tc9154a_set_attenuation(struct fmr2 *fmr2, int att, u32 channel)
113 reg = TC9154A_ATT_MAJ(att / 10) | TC9154A_ATT_MIN((att % 10) / 2);
115 /* write 18-bit shift register, LSB first */
116 for (i = 0; i < 18; i++) {
117 bit = reg & (1 << i) ? PT_DATA : 0;
118 tc9154a_set_pins(fmr2, bit);
120 tc9154a_set_pins(fmr2, bit | PT_CK);
122 tc9154a_set_pins(fmr2, bit);
125 /* latch register data */
127 tc9154a_set_pins(fmr2, PT_ST);
129 tc9154a_set_pins(fmr2, 0);
132 static int fmr2_s_ctrl(struct v4l2_ctrl *ctrl)
134 struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);
135 struct fmr2 *fmr2 = tea->private_data;
136 int volume, balance, left, right;
139 case V4L2_CID_AUDIO_VOLUME:
141 balance = fmr2->balance->cur.val;
143 case V4L2_CID_AUDIO_BALANCE:
145 volume = fmr2->volume->cur.val;
151 left = right = volume;
153 right = max(0, right + balance);
155 left = max(0, left - balance);
157 tc9154a_set_attenuation(fmr2, abs(left - 68), TC9154A_CHANNEL_LEFT);
158 tc9154a_set_attenuation(fmr2, abs(right - 68), TC9154A_CHANNEL_RIGHT);
163 static const struct v4l2_ctrl_ops fmr2_ctrl_ops = {
164 .s_ctrl = fmr2_s_ctrl,
167 static int fmr2_tea_ext_init(struct snd_tea575x *tea)
169 struct fmr2 *fmr2 = tea->private_data;
171 if (inb(fmr2->io) & FMR2_HASVOL) {
172 fmr2->volume = v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_VOLUME, 0, 68, 2, 56);
173 fmr2->balance = v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_BALANCE, -68, 68, 2, 0);
174 if (tea->ctrl_handler.error) {
175 printk(KERN_ERR "radio-sf16fmr2: can't initialize contrls\n");
176 return tea->ctrl_handler.error;
183 static int __init fmr2_init(void)
185 struct fmr2 *fmr2 = &fmr2_card;
187 fmr2->io = FMR2_PORT;
189 if (!request_region(fmr2->io, 2, "SF16-FMR2")) {
190 printk(KERN_ERR "radio-sf16fmr2: I/O port 0x%x already in use\n", fmr2->io);
194 fmr2->tea.private_data = fmr2;
195 fmr2->tea.ops = &fmr2_tea_ops;
196 fmr2->tea.ext_init = fmr2_tea_ext_init;
197 strlcpy(fmr2->tea.card, "SF16-FMR2", sizeof(fmr2->tea.card));
198 strcpy(fmr2->tea.bus_info, "ISA");
200 if (snd_tea575x_init(&fmr2->tea)) {
201 printk(KERN_ERR "radio-sf16fmr2: Unable to detect TEA575x tuner\n");
202 release_region(fmr2->io, 2);
206 printk(KERN_INFO "radio-sf16fmr2: SF16-FMR2 radio card at 0x%x.\n", fmr2->io);
210 static void __exit fmr2_exit(void)
212 struct fmr2 *fmr2 = &fmr2_card;
214 snd_tea575x_exit(&fmr2->tea);
215 release_region(fmr2->io, 2);
218 module_init(fmr2_init);
219 module_exit(fmr2_exit);