[deliverable/linux.git] / drivers / media / radio / radio-gemtek.c

/*
 * GemTek radio card driver
 *
 * Copyright 1998 Jonas Munsin <jmunsin@iki.fi>
 *
 * GemTek hasn't released any specs on the card, so the protocol had to
 * be reverse engineered with dosemu.
 *
 * Besides the protocol changes, this is mostly a copy of:
 *
 *    RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
 *
 *    Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
 *    Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
 *    Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
 *
 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
 *
 * Note: this card seems to swap the left and right audio channels!
 *
 * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
 */

#include <linux/module.h>	/* Modules 			*/
#include <linux/init.h>		/* Initdata			*/
#include <linux/ioport.h>	/* request_region		*/
#include <linux/delay.h>	/* udelay			*/
#include <linux/videodev2.h>	/* kernel radio structs		*/
#include <linux/mutex.h>
#include <linux/io.h>		/* outb, outb_p			*/
#include <linux/slab.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include "radio-isa.h"

/*
 * Module info.
 */

MODULE_AUTHOR("Jonas Munsin, Pekka Seppänen <pexu@kapsi.fi>");
MODULE_DESCRIPTION("A driver for the GemTek Radio card.");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");

/*
 * Module params.
 */

#ifndef CONFIG_RADIO_GEMTEK_PORT
#define CONFIG_RADIO_GEMTEK_PORT -1
#endif
#ifndef CONFIG_RADIO_GEMTEK_PROBE
#define CONFIG_RADIO_GEMTEK_PROBE 1
#endif

#define GEMTEK_MAX 4

static bool probe = CONFIG_RADIO_GEMTEK_PROBE;
static bool hardmute;
static int io[GEMTEK_MAX] = { [0] = CONFIG_RADIO_GEMTEK_PORT,
			      [1 ... (GEMTEK_MAX - 1)] = -1 };
static int radio_nr[GEMTEK_MAX]	= { [0 ... (GEMTEK_MAX - 1)] = -1 };

module_param(probe, bool, 0444);
MODULE_PARM_DESC(probe, "Enable automatic device probing.");

module_param(hardmute, bool, 0644);
MODULE_PARM_DESC(hardmute, "Enable 'hard muting' by shutting down PLL, may "
	 "reduce static noise.");

module_param_array(io, int, NULL, 0444);
MODULE_PARM_DESC(io, "Force I/O ports for the GemTek Radio card if automatic "
	 "probing is disabled or fails. The most common I/O ports are: 0x20c "
	 "0x30c, 0x24c or 0x34c (0x20c, 0x248 and 0x28c have been reported to "
	 "work for the combined sound/radiocard).");

module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(radio_nr, "Radio device numbers");

/*
 * Frequency calculation constants.  Intermediate frequency 10.52 MHz (nominal
 * value 10.7 MHz), reference divisor 6.39 kHz (nominal 6.25 kHz).
 */
#define FSCALE		8
#define IF_OFFSET	((unsigned int)(10.52 * 16000 * (1<<FSCALE)))
#define REF_FREQ	((unsigned int)(6.39 * 16 * (1<<FSCALE)))

#define GEMTEK_CK		0x01	/* Clock signal			*/
#define GEMTEK_DA		0x02	/* Serial data			*/
#define GEMTEK_CE		0x04	/* Chip enable			*/
#define GEMTEK_NS		0x08	/* No signal			*/
#define GEMTEK_MT		0x10	/* Line mute			*/
#define GEMTEK_STDF_3_125_KHZ	0x01	/* Standard frequency 3.125 kHz	*/
#define GEMTEK_PLL_OFF		0x07	/* PLL off			*/

#define BU2614_BUS_SIZE	32	/* BU2614 / BU2614FS bus size		*/

#define SHORT_DELAY 5		/* usec */
#define LONG_DELAY 75		/* usec */

struct gemtek {
	struct radio_isa_card isa;
	bool muted;
	u32 bu2614data;
};

#define BU2614_FREQ_BITS 	16 /* D0..D15, Frequency data		*/
#define BU2614_PORT_BITS	3 /* P0..P2, Output port control data	*/
#define BU2614_VOID_BITS	4 /* unused 				*/
#define BU2614_FMES_BITS	1 /* CT, Frequency measurement beginning data */
#define BU2614_STDF_BITS	3 /* R0..R2, Standard frequency data	*/
#define BU2614_SWIN_BITS	1 /* S, Switch between FMIN / AMIN	*/
#define BU2614_SWAL_BITS        1 /* PS, Swallow counter division (AMIN only)*/
#define BU2614_VOID2_BITS	1 /* unused				*/
#define BU2614_FMUN_BITS	1 /* GT, Frequency measurement time & unlock */
#define BU2614_TEST_BITS	1 /* TS, Test data is input		*/

#define BU2614_FREQ_SHIFT 	0
#define BU2614_PORT_SHIFT	(BU2614_FREQ_BITS + BU2614_FREQ_SHIFT)
#define BU2614_VOID_SHIFT	(BU2614_PORT_BITS + BU2614_PORT_SHIFT)
#define BU2614_FMES_SHIFT	(BU2614_VOID_BITS + BU2614_VOID_SHIFT)
#define BU2614_STDF_SHIFT	(BU2614_FMES_BITS + BU2614_FMES_SHIFT)
#define BU2614_SWIN_SHIFT	(BU2614_STDF_BITS + BU2614_STDF_SHIFT)
#define BU2614_SWAL_SHIFT	(BU2614_SWIN_BITS + BU2614_SWIN_SHIFT)
#define BU2614_VOID2_SHIFT	(BU2614_SWAL_BITS + BU2614_SWAL_SHIFT)
#define BU2614_FMUN_SHIFT	(BU2614_VOID2_BITS + BU2614_VOID2_SHIFT)
#define BU2614_TEST_SHIFT	(BU2614_FMUN_BITS + BU2614_FMUN_SHIFT)

#define MKMASK(field)	(((1<<BU2614_##field##_BITS) - 1) << \
			BU2614_##field##_SHIFT)
#define BU2614_PORT_MASK	MKMASK(PORT)
#define BU2614_FREQ_MASK	MKMASK(FREQ)
#define BU2614_VOID_MASK	MKMASK(VOID)
#define BU2614_FMES_MASK	MKMASK(FMES)
#define BU2614_STDF_MASK	MKMASK(STDF)
#define BU2614_SWIN_MASK	MKMASK(SWIN)
#define BU2614_SWAL_MASK	MKMASK(SWAL)
#define BU2614_VOID2_MASK	MKMASK(VOID2)
#define BU2614_FMUN_MASK	MKMASK(FMUN)
#define BU2614_TEST_MASK	MKMASK(TEST)

/*
 * Set data which will be sent to BU2614FS.
 */
#define gemtek_bu2614_set(dev, field, data) ((dev)->bu2614data = \
	((dev)->bu2614data & ~field##_MASK) | ((data) << field##_SHIFT))

/*
 * Transmit settings to BU2614FS over GemTek IC.
 */
static void gemtek_bu2614_transmit(struct gemtek *gt)
{
	struct radio_isa_card *isa = &gt->isa;
	int i, bit, q, mute;

	mute = gt->muted ? GEMTEK_MT : 0x00;

	outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, isa->io);
	udelay(LONG_DELAY);

	for (i = 0, q = gt->bu2614data; i < 32; i++, q >>= 1) {
		bit = (q & 1) ? GEMTEK_DA : 0;
		outb_p(mute | GEMTEK_CE | bit, isa->io);
		udelay(SHORT_DELAY);
		outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, isa->io);
		udelay(SHORT_DELAY);
	}

	outb_p(mute | GEMTEK_DA | GEMTEK_CK, isa->io);
	udelay(SHORT_DELAY);
}

/*
 * Calculate divisor from FM-frequency for BU2614FS (3.125 KHz STDF expected).
 */
static unsigned long gemtek_convfreq(unsigned long freq)
{
	return ((freq << FSCALE) + IF_OFFSET + REF_FREQ / 2) / REF_FREQ;
}

static struct radio_isa_card *gemtek_alloc(void)
{
	struct gemtek *gt = kzalloc(sizeof(*gt), GFP_KERNEL);

	if (gt)
		gt->muted = true;
	return gt ? &gt->isa : NULL;
}

/*
 * Set FM-frequency.
 */
static int gemtek_s_frequency(struct radio_isa_card *isa, u32 freq)
{
	struct gemtek *gt = container_of(isa, struct gemtek, isa);

	if (hardmute && gt->muted)
		return 0;

	gemtek_bu2614_set(gt, BU2614_PORT, 0);
	gemtek_bu2614_set(gt, BU2614_FMES, 0);
	gemtek_bu2614_set(gt, BU2614_SWIN, 0);	/* FM-mode	*/
	gemtek_bu2614_set(gt, BU2614_SWAL, 0);
	gemtek_bu2614_set(gt, BU2614_FMUN, 1);	/* GT bit set	*/
	gemtek_bu2614_set(gt, BU2614_TEST, 0);
	gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_STDF_3_125_KHZ);
	gemtek_bu2614_set(gt, BU2614_FREQ, gemtek_convfreq(freq));
	gemtek_bu2614_transmit(gt);
	return 0;
}

/*
 * Set mute flag.
 */
static int gemtek_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
{
	struct gemtek *gt = container_of(isa, struct gemtek, isa);
	int i;

	gt->muted = mute;
	if (hardmute) {
		if (!mute)
			return gemtek_s_frequency(isa, isa->freq);

		/* Turn off PLL, disable data output */
		gemtek_bu2614_set(gt, BU2614_PORT, 0);
		gemtek_bu2614_set(gt, BU2614_FMES, 0);	/* CT bit off	*/
		gemtek_bu2614_set(gt, BU2614_SWIN, 0);	/* FM-mode	*/
		gemtek_bu2614_set(gt, BU2614_SWAL, 0);
		gemtek_bu2614_set(gt, BU2614_FMUN, 0);	/* GT bit off	*/
		gemtek_bu2614_set(gt, BU2614_TEST, 0);
		gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_PLL_OFF);
		gemtek_bu2614_set(gt, BU2614_FREQ, 0);
		gemtek_bu2614_transmit(gt);
		return 0;
	}

	/* Read bus contents (CE, CK and DA). */
	i = inb_p(isa->io);
	/* Write it back with mute flag set. */
	outb_p((i >> 5) | (mute ? GEMTEK_MT : 0), isa->io);
	udelay(SHORT_DELAY);
	return 0;
}

static u32 gemtek_g_rxsubchans(struct radio_isa_card *isa)
{
	if (inb_p(isa->io) & GEMTEK_NS)
		return V4L2_TUNER_SUB_MONO;
	return V4L2_TUNER_SUB_STEREO;
}

/*
 * Check if requested card acts like GemTek Radio card.
 */
static bool gemtek_probe(struct radio_isa_card *isa, int io)
{
	int i, q;

	q = inb_p(io);	/* Read bus contents before probing. */
	/* Try to turn on CE, CK and DA respectively and check if card responds
	   properly. */
	for (i = 0; i < 3; ++i) {
		outb_p(1 << i, io);
		udelay(SHORT_DELAY);

		if ((inb_p(io) & ~GEMTEK_NS) != (0x17 | (1 << (i + 5))))
			return false;
	}
	outb_p(q >> 5, io);	/* Write bus contents back. */
	udelay(SHORT_DELAY);
	return true;
}

static const struct radio_isa_ops gemtek_ops = {
	.alloc = gemtek_alloc,
	.probe = gemtek_probe,
	.s_mute_volume = gemtek_s_mute_volume,
	.s_frequency = gemtek_s_frequency,
	.g_rxsubchans = gemtek_g_rxsubchans,
};

static const int gemtek_ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };

static struct radio_isa_driver gemtek_driver = {
	.driver = {
		.match		= radio_isa_match,
		.probe		= radio_isa_probe,
		.remove		= radio_isa_remove,
		.driver		= {
			.name	= "radio-gemtek",
		},
	},
	.io_params = io,
	.radio_nr_params = radio_nr,
	.io_ports = gemtek_ioports,
	.num_of_io_ports = ARRAY_SIZE(gemtek_ioports),
	.region_size = 1,
	.card = "GemTek Radio",
	.ops = &gemtek_ops,
	.has_stereo = true,
};

static int __init gemtek_init(void)
{
	gemtek_driver.probe = probe;
	return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX);
}

static void __exit gemtek_exit(void)
{
	hardmute = 1;	/* Turn off PLL */
	isa_unregister_driver(&gemtek_driver.driver);
}

module_init(gemtek_init);
module_exit(gemtek_exit);
Commit	Line	Data
f8c08524 HV	1	/*
	2	* GemTek radio card driver
	3	*
	4	* Copyright 1998 Jonas Munsin <jmunsin@iki.fi>
1da177e4 LT	5	*
	6	* GemTek hasn't released any specs on the card, so the protocol had to
	7	* be reverse engineered with dosemu.
	8	*
	9	* Besides the protocol changes, this is mostly a copy of:
	10	*
	11	* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
4286c6f6	12	*
1da177e4	13	* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
d9b01449	14	* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
1da177e4 LT	15	* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
1da177e4 LT	16	*
f8c08524	17	* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
d1c4ecde	18	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
f8c08524 HV	19	*
	20	* Note: this card seems to swap the left and right audio channels!
	21	*
	22	* Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
1da177e4 LT	23	*/
	24
	25	#include <linux/module.h> /* Modules */
	26	#include <linux/init.h> /* Initdata */
fb911ee8	27	#include <linux/ioport.h> /* request_region */
1da177e4	28	#include <linux/delay.h> /* udelay */
d1c4ecde	29	#include <linux/videodev2.h> /* kernel radio structs */
502b71b5 HV	30	#include <linux/mutex.h>
502b71b5 HV	31	#include <linux/io.h> /* outb, outb_p */
9f1dfccf	32	#include <linux/slab.h>
35ea11ff	33	#include <media/v4l2-ioctl.h>
502b71b5	34	#include <media/v4l2-device.h>
f8c08524	35	#include "radio-isa.h"
1da177e4	36
4753647e PS	37	/*
	38	* Module info.
	39	*/
	40
29834c1a	41	MODULE_AUTHOR("Jonas Munsin, Pekka Seppänen <pexu@kapsi.fi>");
4753647e PS	42	MODULE_DESCRIPTION("A driver for the GemTek Radio card.");
4753647e PS	43	MODULE_LICENSE("GPL");
f8c08524	44	MODULE_VERSION("1.0.0");
4753647e PS	45
	46	/*
	47	* Module params.
	48	*/
d1c4ecde	49
1da177e4 LT	50	#ifndef CONFIG_RADIO_GEMTEK_PORT
	51	#define CONFIG_RADIO_GEMTEK_PORT -1
	52	#endif
4753647e PS	53	#ifndef CONFIG_RADIO_GEMTEK_PROBE
	54	#define CONFIG_RADIO_GEMTEK_PROBE 1
	55	#endif
1da177e4	56
f8c08524	57	#define GEMTEK_MAX 4
1da177e4	58
f8c08524 HV	59	static bool probe = CONFIG_RADIO_GEMTEK_PROBE;
	60	static bool hardmute;
	61	static int io[GEMTEK_MAX] = { [0] = CONFIG_RADIO_GEMTEK_PORT,
	62	[1 ... (GEMTEK_MAX - 1)] = -1 };
	63	static int radio_nr[GEMTEK_MAX] = { [0 ... (GEMTEK_MAX - 1)] = -1 };
4753647e PS	64
4753647e PS	65	module_param(probe, bool, 0444);
f8c08524	66	MODULE_PARM_DESC(probe, "Enable automatic device probing.");
4753647e PS	67
4753647e PS	68	module_param(hardmute, bool, 0644);
f8c08524	69	MODULE_PARM_DESC(hardmute, "Enable 'hard muting' by shutting down PLL, may "
4753647e PS	70	"reduce static noise.");
4753647e PS	71
f8c08524 HV	72	module_param_array(io, int, NULL, 0444);
	73	MODULE_PARM_DESC(io, "Force I/O ports for the GemTek Radio card if automatic "
	74	"probing is disabled or fails. The most common I/O ports are: 0x20c "
	75	"0x30c, 0x24c or 0x34c (0x20c, 0x248 and 0x28c have been reported to "
	76	"work for the combined sound/radiocard).");
4753647e	77
f8c08524 HV	78	module_param_array(radio_nr, int, NULL, 0444);
f8c08524 HV	79	MODULE_PARM_DESC(radio_nr, "Radio device numbers");
4753647e	80
857e594a TP	81	/*
	82	* Frequency calculation constants. Intermediate frequency 10.52 MHz (nominal
	83	* value 10.7 MHz), reference divisor 6.39 kHz (nominal 6.25 kHz).
	84	*/
	85	#define FSCALE 8
	86	#define IF_OFFSET ((unsigned int)(10.52 * 16000 * (1<<FSCALE)))
	87	#define REF_FREQ ((unsigned int)(6.39 * 16 * (1<<FSCALE)))
	88
4753647e PS	89	#define GEMTEK_CK 0x01 /* Clock signal */
	90	#define GEMTEK_DA 0x02 /* Serial data */
	91	#define GEMTEK_CE 0x04 /* Chip enable */
	92	#define GEMTEK_NS 0x08 /* No signal */
	93	#define GEMTEK_MT 0x10 /* Line mute */
	94	#define GEMTEK_STDF_3_125_KHZ 0x01 /* Standard frequency 3.125 kHz */
	95	#define GEMTEK_PLL_OFF 0x07 /* PLL off */
	96
	97	#define BU2614_BUS_SIZE 32 /* BU2614 / BU2614FS bus size */
4753647e PS	98
	99	#define SHORT_DELAY 5 /* usec */
	100	#define LONG_DELAY 75 /* usec */
	101
502b71b5	102	struct gemtek {
f8c08524 HV	103	struct radio_isa_card isa;
f8c08524 HV	104	bool muted;
b25be979	105	u32 bu2614data;
1da177e4 LT	106	};
1da177e4 LT	107
b25be979 TP	108	#define BU2614_FREQ_BITS 16 /* D0..D15, Frequency data */
	109	#define BU2614_PORT_BITS 3 /* P0..P2, Output port control data */
	110	#define BU2614_VOID_BITS 4 /* unused */
	111	#define BU2614_FMES_BITS 1 /* CT, Frequency measurement beginning data */
	112	#define BU2614_STDF_BITS 3 /* R0..R2, Standard frequency data */
	113	#define BU2614_SWIN_BITS 1 /* S, Switch between FMIN / AMIN */
	114	#define BU2614_SWAL_BITS 1 /* PS, Swallow counter division (AMIN only)*/
	115	#define BU2614_VOID2_BITS 1 /* unused */
	116	#define BU2614_FMUN_BITS 1 /* GT, Frequency measurement time & unlock */
	117	#define BU2614_TEST_BITS 1 /* TS, Test data is input */
	118
	119	#define BU2614_FREQ_SHIFT 0
	120	#define BU2614_PORT_SHIFT (BU2614_FREQ_BITS + BU2614_FREQ_SHIFT)
	121	#define BU2614_VOID_SHIFT (BU2614_PORT_BITS + BU2614_PORT_SHIFT)
	122	#define BU2614_FMES_SHIFT (BU2614_VOID_BITS + BU2614_VOID_SHIFT)
	123	#define BU2614_STDF_SHIFT (BU2614_FMES_BITS + BU2614_FMES_SHIFT)
	124	#define BU2614_SWIN_SHIFT (BU2614_STDF_BITS + BU2614_STDF_SHIFT)
	125	#define BU2614_SWAL_SHIFT (BU2614_SWIN_BITS + BU2614_SWIN_SHIFT)
	126	#define BU2614_VOID2_SHIFT (BU2614_SWAL_BITS + BU2614_SWAL_SHIFT)
	127	#define BU2614_FMUN_SHIFT (BU2614_VOID2_BITS + BU2614_VOID2_SHIFT)
	128	#define BU2614_TEST_SHIFT (BU2614_FMUN_BITS + BU2614_FMUN_SHIFT)
	129
	130	#define MKMASK(field) (((1<<BU2614_##field##_BITS) - 1) << \
	131	BU2614_##field##_SHIFT)
	132	#define BU2614_PORT_MASK MKMASK(PORT)
	133	#define BU2614_FREQ_MASK MKMASK(FREQ)
	134	#define BU2614_VOID_MASK MKMASK(VOID)
	135	#define BU2614_FMES_MASK MKMASK(FMES)
	136	#define BU2614_STDF_MASK MKMASK(STDF)
	137	#define BU2614_SWIN_MASK MKMASK(SWIN)
	138	#define BU2614_SWAL_MASK MKMASK(SWAL)
	139	#define BU2614_VOID2_MASK MKMASK(VOID2)
	140	#define BU2614_FMUN_MASK MKMASK(FMUN)
	141	#define BU2614_TEST_MASK MKMASK(TEST)
4753647e	142
4753647e PS	143	/*
4753647e PS	144	* Set data which will be sent to BU2614FS.
1da177e4	145	*/
b25be979 TP	146	#define gemtek_bu2614_set(dev, field, data) ((dev)->bu2614data = \
b25be979 TP	147	((dev)->bu2614data & ~field##_MASK) \| ((data) << field##_SHIFT))
4753647e PS	148
	149	/*
	150	* Transmit settings to BU2614FS over GemTek IC.
	151	*/
502b71b5	152	static void gemtek_bu2614_transmit(struct gemtek *gt)
4753647e	153	{
f8c08524	154	struct radio_isa_card *isa = &gt->isa;
4753647e PS	155	int i, bit, q, mute;
4753647e PS	156
502b71b5	157	mute = gt->muted ? GEMTEK_MT : 0x00;
4753647e	158
f8c08524	159	outb_p(mute \| GEMTEK_CE \| GEMTEK_DA \| GEMTEK_CK, isa->io);
4753647e PS	160	udelay(LONG_DELAY);
4753647e PS	161
502b71b5 HV	162	for (i = 0, q = gt->bu2614data; i < 32; i++, q >>= 1) {
502b71b5 HV	163	bit = (q & 1) ? GEMTEK_DA : 0;
f8c08524	164	outb_p(mute \| GEMTEK_CE \| bit, isa->io);
502b71b5	165	udelay(SHORT_DELAY);
f8c08524	166	outb_p(mute \| GEMTEK_CE \| bit \| GEMTEK_CK, isa->io);
502b71b5	167	udelay(SHORT_DELAY);
4753647e PS	168	}
4753647e PS	169
f8c08524	170	outb_p(mute \| GEMTEK_DA \| GEMTEK_CK, isa->io);
4753647e	171	udelay(SHORT_DELAY);
1da177e4 LT	172	}
1da177e4 LT	173
4753647e	174	/*
857e594a	175	* Calculate divisor from FM-frequency for BU2614FS (3.125 KHz STDF expected).
4753647e	176	*/
857e594a	177	static unsigned long gemtek_convfreq(unsigned long freq)
1da177e4	178	{
f8c08524 HV	179	return ((freq << FSCALE) + IF_OFFSET + REF_FREQ / 2) / REF_FREQ;
	180	}
	181
	182	static struct radio_isa_card *gemtek_alloc(void)
	183	{
	184	struct gemtek gt = kzalloc(sizeof(gt), GFP_KERNEL);
	185
	186	if (gt)
	187	gt->muted = true;
	188	return gt ? &gt->isa : NULL;
4753647e PS	189	}
	190
	191	/*
	192	* Set FM-frequency.
	193	*/
f8c08524	194	static int gemtek_s_frequency(struct radio_isa_card *isa, u32 freq)
4753647e	195	{
f8c08524	196	struct gemtek *gt = container_of(isa, struct gemtek, isa);
4753647e	197
f8c08524 HV	198	if (hardmute && gt->muted)
f8c08524 HV	199	return 0;
4753647e	200
502b71b5 HV	201	gemtek_bu2614_set(gt, BU2614_PORT, 0);
	202	gemtek_bu2614_set(gt, BU2614_FMES, 0);
	203	gemtek_bu2614_set(gt, BU2614_SWIN, 0); /* FM-mode */
	204	gemtek_bu2614_set(gt, BU2614_SWAL, 0);
	205	gemtek_bu2614_set(gt, BU2614_FMUN, 1); /* GT bit set */
	206	gemtek_bu2614_set(gt, BU2614_TEST, 0);
502b71b5 HV	207	gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_STDF_3_125_KHZ);
502b71b5 HV	208	gemtek_bu2614_set(gt, BU2614_FREQ, gemtek_convfreq(freq));
502b71b5	209	gemtek_bu2614_transmit(gt);
f8c08524	210	return 0;
1da177e4 LT	211	}
1da177e4 LT	212
4753647e PS	213	/*
	214	* Set mute flag.
	215	*/
f8c08524	216	static int gemtek_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
1da177e4	217	{
f8c08524	218	struct gemtek *gt = container_of(isa, struct gemtek, isa);
4753647e	219	int i;
502b71b5	220
f8c08524	221	gt->muted = mute;
4753647e	222	if (hardmute) {
f8c08524 HV	223	if (!mute)
	224	return gemtek_s_frequency(isa, isa->freq);
	225
4753647e	226	/* Turn off PLL, disable data output */
502b71b5 HV	227	gemtek_bu2614_set(gt, BU2614_PORT, 0);
	228	gemtek_bu2614_set(gt, BU2614_FMES, 0); /* CT bit off */
	229	gemtek_bu2614_set(gt, BU2614_SWIN, 0); /* FM-mode */
	230	gemtek_bu2614_set(gt, BU2614_SWAL, 0);
	231	gemtek_bu2614_set(gt, BU2614_FMUN, 0); /* GT bit off */
	232	gemtek_bu2614_set(gt, BU2614_TEST, 0);
	233	gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_PLL_OFF);
	234	gemtek_bu2614_set(gt, BU2614_FREQ, 0);
	235	gemtek_bu2614_transmit(gt);
f8c08524	236	return 0;
502b71b5	237	}
4753647e	238
502b71b5	239	/* Read bus contents (CE, CK and DA). */
f8c08524	240	i = inb_p(isa->io);
502b71b5	241	/* Write it back with mute flag set. */
f8c08524	242	outb_p((i >> 5) \| (mute ? GEMTEK_MT : 0), isa->io);
502b71b5	243	udelay(SHORT_DELAY);
f8c08524	244	return 0;
1da177e4 LT	245	}
1da177e4 LT	246
f8c08524	247	static u32 gemtek_g_rxsubchans(struct radio_isa_card *isa)
1da177e4	248	{
f8c08524 HV	249	if (inb_p(isa->io) & GEMTEK_NS)
	250	return V4L2_TUNER_SUB_MONO;
	251	return V4L2_TUNER_SUB_STEREO;
4753647e	252	}
1da177e4	253
4753647e PS	254	/*
	255	* Check if requested card acts like GemTek Radio card.
	256	*/
f8c08524	257	static bool gemtek_probe(struct radio_isa_card *isa, int io)
4753647e	258	{
4753647e	259	int i, q;
1da177e4	260
f8c08524	261	q = inb_p(io); /* Read bus contents before probing. */
4753647e PS	262	/* Try to turn on CE, CK and DA respectively and check if card responds
	263	properly. */
	264	for (i = 0; i < 3; ++i) {
f8c08524	265	outb_p(1 << i, io);
4753647e	266	udelay(SHORT_DELAY);
1da177e4	267
f8c08524 HV	268	if ((inb_p(io) & ~GEMTEK_NS) != (0x17 \| (1 << (i + 5))))
f8c08524 HV	269	return false;
4753647e	270	}
f8c08524	271	outb_p(q >> 5, io); /* Write bus contents back. */
4753647e	272	udelay(SHORT_DELAY);
f8c08524	273	return true;
1da177e4 LT	274	}
1da177e4 LT	275
f8c08524 HV	276	static const struct radio_isa_ops gemtek_ops = {
	277	.alloc = gemtek_alloc,
	278	.probe = gemtek_probe,
	279	.s_mute_volume = gemtek_s_mute_volume,
	280	.s_frequency = gemtek_s_frequency,
	281	.g_rxsubchans = gemtek_g_rxsubchans,
4753647e PS	282	};
4753647e PS	283
f8c08524 HV	284	static const int gemtek_ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };
	285
	286	static struct radio_isa_driver gemtek_driver = {
	287	.driver = {
	288	.match = radio_isa_match,
	289	.probe = radio_isa_probe,
	290	.remove = radio_isa_remove,
	291	.driver = {
	292	.name = "radio-gemtek",
	293	},
	294	},
	295	.io_params = io,
	296	.radio_nr_params = radio_nr,
	297	.io_ports = gemtek_ioports,
	298	.num_of_io_ports = ARRAY_SIZE(gemtek_ioports),
	299	.region_size = 1,
	300	.card = "GemTek Radio",
	301	.ops = &gemtek_ops,
	302	.has_stereo = true,
1da177e4 LT	303	};
1da177e4 LT	304
1da177e4 LT	305	static int __init gemtek_init(void)
1da177e4 LT	306	{
f8c08524 HV	307	gemtek_driver.probe = probe;
f8c08524 HV	308	return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX);
1da177e4 LT	309	}
1da177e4 LT	310
4753647e	311	static void __exit gemtek_exit(void)
1da177e4	312	{
f8c08524 HV	313	hardmute = 1; /* Turn off PLL */
f8c08524 HV	314	isa_unregister_driver(&gemtek_driver.driver);
1da177e4 LT	315	}
	316
	317	module_init(gemtek_init);
4753647e	318	module_exit(gemtek_exit);