1 // SPDX-License-Identifier: GPL-2.0-only
10  *  It seems that the card is not linear to 0 volume. It cuts off
17  * 1999-05-06 - (C. van Schaik)
18  *	      - Make signal strength and stereo scans
19  *		kinder to cpu while in delay
20  * 1999-01-05 - (C. van Schaik)
21  *	      - Changed tuning to 1/160Mhz accuracy
22  *	      - Added stereo support
23  *		(card defaults to stereo)
24  *		(can explicitly force mono on the card)
25  *		(can detect if station is in stereo)
26  *	      - Added unmute function
27  *	      - Reworked ioctl functions
28  * 2002-07-15 - Fix Stereo typo
30  * 2006-07-24 - Converted to V4L2 API
33  * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
39  * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
45 #include <linux/delay.h>	/* udelay, msleep                 */
50 #include <media/v4l2-device.h>
51 #include <media/v4l2-ioctl.h>
52 #include "radio-isa.h"
60 #define CONFIG_RADIO_ZOLTRIX_PORT -1
66 			       [1 ... (ZOLTRIX_MAX - 1)] = -1 };
67 static int radio_nr[ZOLTRIX_MAX] = { [0 ... (ZOLTRIX_MAX - 1)] = -1 };
70 MODULE_PARM_DESC(io, "I/O addresses of the Zoltrix Radio Plus card (0x20c or 0x30c)");
84 	return zol ? &zol->isa : NULL;  in zoltrix_alloc()
91 	zol->curvol = vol;  in zoltrix_s_mute_volume()
92 	zol->muted = mute;  in zoltrix_s_mute_volume()
94 		outb(0, isa->io);  in zoltrix_s_mute_volume()
95 		outb(0, isa->io);  in zoltrix_s_mute_volume()
96 		inb(isa->io + 3);            /* Zoltrix needs to be read to confirm */  in zoltrix_s_mute_volume()
100 	outb(vol - 1, isa->io);  in zoltrix_s_mute_volume()
102 	inb(isa->io + 2);  in zoltrix_s_mute_volume()
110 	struct v4l2_device *v4l2_dev = &isa->v4l2_dev;  in zoltrix_s_frequency()
112 	bool stereo = isa->stereo;  in zoltrix_s_frequency()
117 		return -EINVAL;  in zoltrix_s_frequency()
120 	m = (freq / 160 - 8800) * 2;  in zoltrix_s_frequency()
126 	outb(0, isa->io);  in zoltrix_s_frequency()
127 	outb(0, isa->io);  in zoltrix_s_frequency()
128 	inb(isa->io + 3);            /* Zoltrix needs to be read to confirm */  in zoltrix_s_frequency()
130 	outb(0x40, isa->io);  in zoltrix_s_frequency()
131 	outb(0xc0, isa->io);  in zoltrix_s_frequency()
134 	while (i--) {  in zoltrix_s_frequency()
136 			outb(0x80, isa->io);  in zoltrix_s_frequency()
138 			outb(0x00, isa->io);  in zoltrix_s_frequency()
140 			outb(0x80, isa->io);  in zoltrix_s_frequency()
143 			outb(0xc0, isa->io);  in zoltrix_s_frequency()
145 			outb(0x40, isa->io);  in zoltrix_s_frequency()
147 			outb(0xc0, isa->io);  in zoltrix_s_frequency()
153 	outb(0x80, isa->io);  in zoltrix_s_frequency()
154 	outb(0xc0, isa->io);  in zoltrix_s_frequency()
155 	outb(0x40, isa->io);  in zoltrix_s_frequency()
157 	inb(isa->io + 2);  in zoltrix_s_frequency()
160 	return zoltrix_s_mute_volume(isa, zol->muted, zol->curvol);  in zoltrix_s_frequency()
169 	outb(0x00, isa->io);         /* This stuff I found to do nothing */  in zoltrix_g_rxsubchans()
170 	outb(zol->curvol, isa->io);  in zoltrix_g_rxsubchans()
173 	a = inb(isa->io);  in zoltrix_g_rxsubchans()
175 	b = inb(isa->io);  in zoltrix_g_rxsubchans()
186 	outb(0x00, isa->io);         /* This stuff I found to do nothing */  in zoltrix_g_signal()
187 	outb(zol->curvol, isa->io);  in zoltrix_g_signal()
190 	a = inb(isa->io);  in zoltrix_g_signal()
192 	b = inb(isa->io);  in zoltrix_g_signal()
197 	/* I found this out by playing with a binary scanner on the card io */  in zoltrix_g_signal()
203 	return zoltrix_s_frequency(isa, isa->freq);  in zoltrix_s_stereo()
223 			.name	= "radio-zoltrix",
231 	.card = "Zoltrix Radio Plus",