[linux-2.6-block.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@kernel.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/pnp.h>
#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 };

#ifdef CONFIG_PNP
static const struct pnp_device_id gemtek_pnp_devices[] = {
	/* AOpen FX-3D/Pro Radio */
	{.id = "ADS7183", .driver_data = 0},
	{.id = ""}
};

MODULE_DEVICE_TABLE(pnp, gemtek_pnp_devices);
#endif

static struct radio_isa_driver gemtek_driver = {
	.driver = {
		.match		= radio_isa_match,
		.probe		= radio_isa_probe,
		.remove		= radio_isa_remove,
		.driver		= {
			.name	= "radio-gemtek",
		},
	},
#ifdef CONFIG_PNP
	.pnp_driver = {
		.name		= "radio-gemtek",
		.id_table	= gemtek_pnp_devices,
		.probe		= radio_isa_pnp_probe,
		.remove		= radio_isa_pnp_remove,
	},
#endif
	.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;
#ifdef CONFIG_PNP
	pnp_register_driver(&gemtek_driver.pnp_driver);
#endif
	return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX);
}

static void __exit gemtek_exit(void)
{
	hardmute = true;	/* Turn off PLL */
#ifdef CONFIG_PNP
	pnp_unregister_driver(&gemtek_driver.pnp_driver);
#endif
	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>
32590819	18	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.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	*/
1da177e4 LT	24
6e6a8b5a	25	#include <linux/module.h> /* Modules */
1da177e4	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 */
38ed1aef	32	#include <linux/pnp.h>
9f1dfccf	33	#include <linux/slab.h>
35ea11ff	34	#include <media/v4l2-ioctl.h>
502b71b5	35	#include <media/v4l2-device.h>
f8c08524	36	#include "radio-isa.h"
1da177e4	37
4753647e PS	38	/*
	39	* Module info.
	40	*/
	41
29834c1a	42	MODULE_AUTHOR("Jonas Munsin, Pekka Seppänen <pexu@kapsi.fi>");
4753647e PS	43	MODULE_DESCRIPTION("A driver for the GemTek Radio card.");
4753647e PS	44	MODULE_LICENSE("GPL");
f8c08524	45	MODULE_VERSION("1.0.0");
4753647e PS	46
	47	/*
	48	* Module params.
	49	*/
d1c4ecde	50
1da177e4 LT	51	#ifndef CONFIG_RADIO_GEMTEK_PORT
	52	#define CONFIG_RADIO_GEMTEK_PORT -1
	53	#endif
4753647e PS	54	#ifndef CONFIG_RADIO_GEMTEK_PROBE
	55	#define CONFIG_RADIO_GEMTEK_PROBE 1
	56	#endif
1da177e4	57
f8c08524	58	#define GEMTEK_MAX 4
1da177e4	59
f8c08524 HV	60	static bool probe = CONFIG_RADIO_GEMTEK_PROBE;
	61	static bool hardmute;
	62	static int io[GEMTEK_MAX] = { [0] = CONFIG_RADIO_GEMTEK_PORT,
	63	[1 ... (GEMTEK_MAX - 1)] = -1 };
	64	static int radio_nr[GEMTEK_MAX] = { [0 ... (GEMTEK_MAX - 1)] = -1 };
4753647e PS	65
4753647e PS	66	module_param(probe, bool, 0444);
f8c08524	67	MODULE_PARM_DESC(probe, "Enable automatic device probing.");
4753647e PS	68
4753647e PS	69	module_param(hardmute, bool, 0644);
547633de	70	MODULE_PARM_DESC(hardmute, "Enable 'hard muting' by shutting down PLL, may reduce static noise.");
4753647e	71
f8c08524	72	module_param_array(io, int, NULL, 0444);
547633de	73	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).");
4753647e	74
f8c08524 HV	75	module_param_array(radio_nr, int, NULL, 0444);
f8c08524 HV	76	MODULE_PARM_DESC(radio_nr, "Radio device numbers");
4753647e	77
857e594a TP	78	/*
	79	* Frequency calculation constants. Intermediate frequency 10.52 MHz (nominal
	80	* value 10.7 MHz), reference divisor 6.39 kHz (nominal 6.25 kHz).
	81	*/
	82	#define FSCALE 8
	83	#define IF_OFFSET ((unsigned int)(10.52 * 16000 * (1<<FSCALE)))
	84	#define REF_FREQ ((unsigned int)(6.39 * 16 * (1<<FSCALE)))
	85
4753647e PS	86	#define GEMTEK_CK 0x01 /* Clock signal */
	87	#define GEMTEK_DA 0x02 /* Serial data */
	88	#define GEMTEK_CE 0x04 /* Chip enable */
	89	#define GEMTEK_NS 0x08 /* No signal */
	90	#define GEMTEK_MT 0x10 /* Line mute */
	91	#define GEMTEK_STDF_3_125_KHZ 0x01 /* Standard frequency 3.125 kHz */
	92	#define GEMTEK_PLL_OFF 0x07 /* PLL off */
	93
	94	#define BU2614_BUS_SIZE 32 /* BU2614 / BU2614FS bus size */
4753647e PS	95
	96	#define SHORT_DELAY 5 /* usec */
	97	#define LONG_DELAY 75 /* usec */
	98
502b71b5	99	struct gemtek {
f8c08524 HV	100	struct radio_isa_card isa;
f8c08524 HV	101	bool muted;
b25be979	102	u32 bu2614data;
1da177e4 LT	103	};
1da177e4 LT	104
6e6a8b5a	105	#define BU2614_FREQ_BITS 16 /* D0..D15, Frequency data */
b25be979	106	#define BU2614_PORT_BITS 3 /* P0..P2, Output port control data */
6e6a8b5a	107	#define BU2614_VOID_BITS 4 /* unused */
b25be979 TP	108	#define BU2614_FMES_BITS 1 /* CT, Frequency measurement beginning data */
	109	#define BU2614_STDF_BITS 3 /* R0..R2, Standard frequency data */
	110	#define BU2614_SWIN_BITS 1 /* S, Switch between FMIN / AMIN */
	111	#define BU2614_SWAL_BITS 1 /* PS, Swallow counter division (AMIN only)*/
	112	#define BU2614_VOID2_BITS 1 /* unused */
	113	#define BU2614_FMUN_BITS 1 /* GT, Frequency measurement time & unlock */
	114	#define BU2614_TEST_BITS 1 /* TS, Test data is input */
	115
6e6a8b5a	116	#define BU2614_FREQ_SHIFT 0
b25be979 TP	117	#define BU2614_PORT_SHIFT (BU2614_FREQ_BITS + BU2614_FREQ_SHIFT)
	118	#define BU2614_VOID_SHIFT (BU2614_PORT_BITS + BU2614_PORT_SHIFT)
	119	#define BU2614_FMES_SHIFT (BU2614_VOID_BITS + BU2614_VOID_SHIFT)
	120	#define BU2614_STDF_SHIFT (BU2614_FMES_BITS + BU2614_FMES_SHIFT)
	121	#define BU2614_SWIN_SHIFT (BU2614_STDF_BITS + BU2614_STDF_SHIFT)
	122	#define BU2614_SWAL_SHIFT (BU2614_SWIN_BITS + BU2614_SWIN_SHIFT)
	123	#define BU2614_VOID2_SHIFT (BU2614_SWAL_BITS + BU2614_SWAL_SHIFT)
	124	#define BU2614_FMUN_SHIFT (BU2614_VOID2_BITS + BU2614_VOID2_SHIFT)
	125	#define BU2614_TEST_SHIFT (BU2614_FMUN_BITS + BU2614_FMUN_SHIFT)
	126
	127	#define MKMASK(field) (((1<<BU2614_##field##_BITS) - 1) << \
	128	BU2614_##field##_SHIFT)
	129	#define BU2614_PORT_MASK MKMASK(PORT)
	130	#define BU2614_FREQ_MASK MKMASK(FREQ)
	131	#define BU2614_VOID_MASK MKMASK(VOID)
	132	#define BU2614_FMES_MASK MKMASK(FMES)
	133	#define BU2614_STDF_MASK MKMASK(STDF)
	134	#define BU2614_SWIN_MASK MKMASK(SWIN)
	135	#define BU2614_SWAL_MASK MKMASK(SWAL)
	136	#define BU2614_VOID2_MASK MKMASK(VOID2)
	137	#define BU2614_FMUN_MASK MKMASK(FMUN)
	138	#define BU2614_TEST_MASK MKMASK(TEST)
4753647e	139
4753647e PS	140	/*
4753647e PS	141	* Set data which will be sent to BU2614FS.
1da177e4	142	*/
b25be979 TP	143	#define gemtek_bu2614_set(dev, field, data) ((dev)->bu2614data = \
b25be979 TP	144	((dev)->bu2614data & ~field##_MASK) \| ((data) << field##_SHIFT))
4753647e PS	145
	146	/*
	147	* Transmit settings to BU2614FS over GemTek IC.
	148	*/
502b71b5	149	static void gemtek_bu2614_transmit(struct gemtek *gt)
4753647e	150	{
f8c08524	151	struct radio_isa_card *isa = &gt->isa;
4753647e PS	152	int i, bit, q, mute;
4753647e PS	153
502b71b5	154	mute = gt->muted ? GEMTEK_MT : 0x00;
4753647e	155
f8c08524	156	outb_p(mute \| GEMTEK_CE \| GEMTEK_DA \| GEMTEK_CK, isa->io);
4753647e PS	157	udelay(LONG_DELAY);
4753647e PS	158
502b71b5 HV	159	for (i = 0, q = gt->bu2614data; i < 32; i++, q >>= 1) {
502b71b5 HV	160	bit = (q & 1) ? GEMTEK_DA : 0;
f8c08524	161	outb_p(mute \| GEMTEK_CE \| bit, isa->io);
502b71b5	162	udelay(SHORT_DELAY);
f8c08524	163	outb_p(mute \| GEMTEK_CE \| bit \| GEMTEK_CK, isa->io);
502b71b5	164	udelay(SHORT_DELAY);
4753647e PS	165	}
4753647e PS	166
f8c08524	167	outb_p(mute \| GEMTEK_DA \| GEMTEK_CK, isa->io);
4753647e	168	udelay(SHORT_DELAY);
1da177e4 LT	169	}
1da177e4 LT	170
4753647e	171	/*
857e594a	172	* Calculate divisor from FM-frequency for BU2614FS (3.125 KHz STDF expected).
4753647e	173	*/
857e594a	174	static unsigned long gemtek_convfreq(unsigned long freq)
1da177e4	175	{
f8c08524 HV	176	return ((freq << FSCALE) + IF_OFFSET + REF_FREQ / 2) / REF_FREQ;
	177	}
	178
	179	static struct radio_isa_card *gemtek_alloc(void)
	180	{
	181	struct gemtek gt = kzalloc(sizeof(gt), GFP_KERNEL);
	182
	183	if (gt)
	184	gt->muted = true;
	185	return gt ? &gt->isa : NULL;
4753647e PS	186	}
	187
	188	/*
	189	* Set FM-frequency.
	190	*/
f8c08524	191	static int gemtek_s_frequency(struct radio_isa_card *isa, u32 freq)
4753647e	192	{
f8c08524	193	struct gemtek *gt = container_of(isa, struct gemtek, isa);
4753647e	194
f8c08524 HV	195	if (hardmute && gt->muted)
f8c08524 HV	196	return 0;
4753647e	197
502b71b5 HV	198	gemtek_bu2614_set(gt, BU2614_PORT, 0);
	199	gemtek_bu2614_set(gt, BU2614_FMES, 0);
	200	gemtek_bu2614_set(gt, BU2614_SWIN, 0); /* FM-mode */
	201	gemtek_bu2614_set(gt, BU2614_SWAL, 0);
	202	gemtek_bu2614_set(gt, BU2614_FMUN, 1); /* GT bit set */
	203	gemtek_bu2614_set(gt, BU2614_TEST, 0);
502b71b5 HV	204	gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_STDF_3_125_KHZ);
502b71b5 HV	205	gemtek_bu2614_set(gt, BU2614_FREQ, gemtek_convfreq(freq));
502b71b5	206	gemtek_bu2614_transmit(gt);
f8c08524	207	return 0;
1da177e4 LT	208	}
1da177e4 LT	209
4753647e PS	210	/*
	211	* Set mute flag.
	212	*/
f8c08524	213	static int gemtek_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
1da177e4	214	{
f8c08524	215	struct gemtek *gt = container_of(isa, struct gemtek, isa);
4753647e	216	int i;
502b71b5	217
f8c08524	218	gt->muted = mute;
4753647e	219	if (hardmute) {
f8c08524 HV	220	if (!mute)
	221	return gemtek_s_frequency(isa, isa->freq);
	222
4753647e	223	/* Turn off PLL, disable data output */
502b71b5 HV	224	gemtek_bu2614_set(gt, BU2614_PORT, 0);
	225	gemtek_bu2614_set(gt, BU2614_FMES, 0); /* CT bit off */
	226	gemtek_bu2614_set(gt, BU2614_SWIN, 0); /* FM-mode */
	227	gemtek_bu2614_set(gt, BU2614_SWAL, 0);
	228	gemtek_bu2614_set(gt, BU2614_FMUN, 0); /* GT bit off */
	229	gemtek_bu2614_set(gt, BU2614_TEST, 0);
	230	gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_PLL_OFF);
	231	gemtek_bu2614_set(gt, BU2614_FREQ, 0);
	232	gemtek_bu2614_transmit(gt);
f8c08524	233	return 0;
502b71b5	234	}
4753647e	235
502b71b5	236	/* Read bus contents (CE, CK and DA). */
f8c08524	237	i = inb_p(isa->io);
502b71b5	238	/* Write it back with mute flag set. */
f8c08524	239	outb_p((i >> 5) \| (mute ? GEMTEK_MT : 0), isa->io);
502b71b5	240	udelay(SHORT_DELAY);
f8c08524	241	return 0;
1da177e4 LT	242	}
1da177e4 LT	243
f8c08524	244	static u32 gemtek_g_rxsubchans(struct radio_isa_card *isa)
1da177e4	245	{
f8c08524 HV	246	if (inb_p(isa->io) & GEMTEK_NS)
	247	return V4L2_TUNER_SUB_MONO;
	248	return V4L2_TUNER_SUB_STEREO;
4753647e	249	}
1da177e4	250
4753647e PS	251	/*
	252	* Check if requested card acts like GemTek Radio card.
	253	*/
f8c08524	254	static bool gemtek_probe(struct radio_isa_card *isa, int io)
4753647e	255	{
4753647e	256	int i, q;
1da177e4	257
f8c08524	258	q = inb_p(io); /* Read bus contents before probing. */
4753647e PS	259	/* Try to turn on CE, CK and DA respectively and check if card responds
	260	properly. */
	261	for (i = 0; i < 3; ++i) {
f8c08524	262	outb_p(1 << i, io);
4753647e	263	udelay(SHORT_DELAY);
1da177e4	264
f8c08524 HV	265	if ((inb_p(io) & ~GEMTEK_NS) != (0x17 \| (1 << (i + 5))))
f8c08524 HV	266	return false;
4753647e	267	}
f8c08524	268	outb_p(q >> 5, io); /* Write bus contents back. */
4753647e	269	udelay(SHORT_DELAY);
f8c08524	270	return true;
1da177e4 LT	271	}
1da177e4 LT	272
f8c08524 HV	273	static const struct radio_isa_ops gemtek_ops = {
	274	.alloc = gemtek_alloc,
	275	.probe = gemtek_probe,
	276	.s_mute_volume = gemtek_s_mute_volume,
	277	.s_frequency = gemtek_s_frequency,
	278	.g_rxsubchans = gemtek_g_rxsubchans,
4753647e PS	279	};
4753647e PS	280
f8c08524 HV	281	static const int gemtek_ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };
f8c08524 HV	282
38ed1aef	283	#ifdef CONFIG_PNP
db4a8505	284	static const struct pnp_device_id gemtek_pnp_devices[] = {
38ed1aef OZ	285	/* AOpen FX-3D/Pro Radio */
	286	{.id = "ADS7183", .driver_data = 0},
	287	{.id = ""}
	288	};
	289
	290	MODULE_DEVICE_TABLE(pnp, gemtek_pnp_devices);
	291	#endif
	292
f8c08524 HV	293	static struct radio_isa_driver gemtek_driver = {
	294	.driver = {
	295	.match = radio_isa_match,
	296	.probe = radio_isa_probe,
	297	.remove = radio_isa_remove,
	298	.driver = {
	299	.name = "radio-gemtek",
	300	},
	301	},
38ed1aef OZ	302	#ifdef CONFIG_PNP
	303	.pnp_driver = {
	304	.name = "radio-gemtek",
	305	.id_table = gemtek_pnp_devices,
	306	.probe = radio_isa_pnp_probe,
	307	.remove = radio_isa_pnp_remove,
	308	},
	309	#endif
f8c08524 HV	310	.io_params = io,
	311	.radio_nr_params = radio_nr,
	312	.io_ports = gemtek_ioports,
	313	.num_of_io_ports = ARRAY_SIZE(gemtek_ioports),
	314	.region_size = 1,
	315	.card = "GemTek Radio",
	316	.ops = &gemtek_ops,
	317	.has_stereo = true,
1da177e4 LT	318	};
1da177e4 LT	319
1da177e4 LT	320	static int __init gemtek_init(void)
1da177e4 LT	321	{
f8c08524	322	gemtek_driver.probe = probe;
38ed1aef OZ	323	#ifdef CONFIG_PNP
	324	pnp_register_driver(&gemtek_driver.pnp_driver);
	325	#endif
f8c08524	326	return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX);
1da177e4 LT	327	}
1da177e4 LT	328
4753647e	329	static void __exit gemtek_exit(void)
1da177e4	330	{
8b4b6818	331	hardmute = true; /* Turn off PLL */
38ed1aef OZ	332	#ifdef CONFIG_PNP
	333	pnp_unregister_driver(&gemtek_driver.pnp_driver);
	334	#endif
f8c08524	335	isa_unregister_driver(&gemtek_driver.driver);
1da177e4 LT	336	}
	337
	338	module_init(gemtek_init);
4753647e	339	module_exit(gemtek_exit);