[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / radio / radio-aztech.c

/*
 * radio-aztech.c - Aztech radio card driver
 *
 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
 * Adapted to support the Video for Linux API by
 * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:
 *
 * Quay Ly
 * Donald Song
 * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)
 * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
 * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
 *
 * 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/io.h>		/* outb, outb_p			*/
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include "radio-isa.h"

MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
MODULE_DESCRIPTION("A driver for the Aztech radio card.");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");

/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
#ifndef CONFIG_RADIO_AZTECH_PORT
#define CONFIG_RADIO_AZTECH_PORT -1
#endif

#define AZTECH_MAX 2

static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,
			      [1 ... (AZTECH_MAX - 1)] = -1 };
static int radio_nr[AZTECH_MAX]	= { [0 ... (AZTECH_MAX - 1)] = -1 };
static const int radio_wait_time = 1000;

module_param_array(io, int, NULL, 0444);
MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(radio_nr, "Radio device numbers");

struct aztech {
	struct radio_isa_card isa;
	int curvol;
};

static void send_0_byte(struct aztech *az)
{
	udelay(radio_wait_time);
	outb_p(2 + az->curvol, az->isa.io);
	outb_p(64 + 2 + az->curvol, az->isa.io);
}

static void send_1_byte(struct aztech *az)
{
	udelay(radio_wait_time);
	outb_p(128 + 2 + az->curvol, az->isa.io);
	outb_p(128 + 64 + 2 + az->curvol, az->isa.io);
}

static struct radio_isa_card *aztech_alloc(void)
{
	struct aztech *az = kzalloc(sizeof(*az), GFP_KERNEL);

	return az ? &az->isa : NULL;
}

static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)
{
	struct aztech *az = container_of(isa, struct aztech, isa);
	int  i;

	freq += 171200;			/* Add 10.7 MHz IF		*/
	freq /= 800;			/* Convert to 50 kHz units	*/

	send_0_byte(az);		/*  0: LSB of frequency       */

	for (i = 0; i < 13; i++)	/*   : frequency bits (1-13)  */
		if (freq & (1 << i))
			send_1_byte(az);
		else
			send_0_byte(az);

	send_0_byte(az);		/* 14: test bit - always 0    */
	send_0_byte(az);		/* 15: test bit - always 0    */
	send_0_byte(az);		/* 16: band data 0 - always 0 */
	if (isa->stereo)		/* 17: stereo (1 to enable)   */
		send_1_byte(az);
	else
		send_0_byte(az);

	send_1_byte(az);		/* 18: band data 1 - unknown  */
	send_0_byte(az);		/* 19: time base - always 0   */
	send_0_byte(az);		/* 20: spacing (0 = 25 kHz)   */
	send_1_byte(az);		/* 21: spacing (1 = 25 kHz)   */
	send_0_byte(az);		/* 22: spacing (0 = 25 kHz)   */
	send_1_byte(az);		/* 23: AM/FM (FM = 1, always) */

	/* latch frequency */

	udelay(radio_wait_time);
	outb_p(128 + 64 + az->curvol, az->isa.io);

	return 0;
}

/* thanks to Michael Dwyer for giving me a dose of clues in
 * the signal strength department..
 *
 * This card has a stereo bit - bit 0 set = mono, not set = stereo
 */
static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)
{
	if (inb(isa->io) & 1)
		return V4L2_TUNER_SUB_MONO;
	return V4L2_TUNER_SUB_STEREO;
}

static int aztech_s_stereo(struct radio_isa_card *isa, bool stereo)
{
	return aztech_s_frequency(isa, isa->freq);
}

static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
{
	struct aztech *az = container_of(isa, struct aztech, isa);

	if (mute)
		vol = 0;
	az->curvol = (vol & 1) + ((vol & 2) << 1);
	outb(az->curvol, isa->io);
	return 0;
}

static const struct radio_isa_ops aztech_ops = {
	.alloc = aztech_alloc,
	.s_mute_volume = aztech_s_mute_volume,
	.s_frequency = aztech_s_frequency,
	.s_stereo = aztech_s_stereo,
	.g_rxsubchans = aztech_g_rxsubchans,
};

static const int aztech_ioports[] = { 0x350, 0x358 };

static struct radio_isa_driver aztech_driver = {
	.driver = {
		.match		= radio_isa_match,
		.probe		= radio_isa_probe,
		.remove		= radio_isa_remove,
		.driver		= {
			.name	= "radio-aztech",
		},
	},
	.io_params = io,
	.radio_nr_params = radio_nr,
	.io_ports = aztech_ioports,
	.num_of_io_ports = ARRAY_SIZE(aztech_ioports),
	.region_size = 2,
	.card = "Aztech Radio",
	.ops = &aztech_ops,
	.has_stereo = true,
	.max_volume = 3,
};

static int __init aztech_init(void)
{
	return isa_register_driver(&aztech_driver.driver, AZTECH_MAX);
}

static void __exit aztech_exit(void)
{
	isa_unregister_driver(&aztech_driver.driver);
}

module_init(aztech_init);
module_exit(aztech_exit);
Commit	Line	Data
3088fba8 HV	1	/*
3088fba8 HV	2	* radio-aztech.c - Aztech radio card driver
1da177e4	3	*
3088fba8	4	* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>
a4366af4	5	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
4286c6f6	6	* Adapted to support the Video for Linux API by
1da177e4 LT	7	* Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
	8	*
	9	* Quay Ly
	10	* Donald Song
4286c6f6	11	* Jason Lewis (jlewis@twilight.vtc.vsc.edu)
1da177e4 LT	12	* Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
	13	* William McGrath (wmcgrath@twilight.vtc.vsc.edu)
	14	*
3088fba8	15	* Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
1da177e4 LT	16	*/
	17
	18	#include <linux/module.h> /* Modules */
	19	#include <linux/init.h> /* Initdata */
fb911ee8	20	#include <linux/ioport.h> /* request_region */
1da177e4	21	#include <linux/delay.h> /* udelay */
a4366af4	22	#include <linux/videodev2.h> /* kernel radio structs */
e697e12e	23	#include <linux/io.h> /* outb, outb_p */
9f1dfccf	24	#include <linux/slab.h>
e697e12e	25	#include <media/v4l2-device.h>
35ea11ff	26	#include <media/v4l2-ioctl.h>
3088fba8 HV	27	#include <media/v4l2-ctrls.h>
3088fba8 HV	28	#include "radio-isa.h"
1da177e4	29
e697e12e HV	30	MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
	31	MODULE_DESCRIPTION("A driver for the Aztech radio card.");
	32	MODULE_LICENSE("GPL");
3088fba8	33	MODULE_VERSION("1.0.0");
a4366af4	34
1da177e4	35	/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
1da177e4 LT	36	#ifndef CONFIG_RADIO_AZTECH_PORT
	37	#define CONFIG_RADIO_AZTECH_PORT -1
	38	#endif
	39
3088fba8	40	#define AZTECH_MAX 2
1da177e4	41
3088fba8 HV	42	static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,
	43	[1 ... (AZTECH_MAX - 1)] = -1 };
	44	static int radio_nr[AZTECH_MAX] = { [0 ... (AZTECH_MAX - 1)] = -1 };
	45	static const int radio_wait_time = 1000;
e697e12e	46
3088fba8 HV	47	module_param_array(io, int, NULL, 0444);
	48	MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");
	49	module_param_array(radio_nr, int, NULL, 0444);
	50	MODULE_PARM_DESC(radio_nr, "Radio device numbers");
	51
	52	struct aztech {
	53	struct radio_isa_card isa;
1da177e4	54	int curvol;
1da177e4 LT	55	};
1da177e4 LT	56
e697e12e	57	static void send_0_byte(struct aztech *az)
1da177e4 LT	58	{
1da177e4 LT	59	udelay(radio_wait_time);
3088fba8 HV	60	outb_p(2 + az->curvol, az->isa.io);
3088fba8 HV	61	outb_p(64 + 2 + az->curvol, az->isa.io);
1da177e4 LT	62	}
1da177e4 LT	63
e697e12e	64	static void send_1_byte(struct aztech *az)
1da177e4	65	{
3088fba8 HV	66	udelay(radio_wait_time);
	67	outb_p(128 + 2 + az->curvol, az->isa.io);
	68	outb_p(128 + 64 + 2 + az->curvol, az->isa.io);
1da177e4 LT	69	}
1da177e4 LT	70
3088fba8	71	static struct radio_isa_card *aztech_alloc(void)
1da177e4	72	{
3088fba8	73	struct aztech az = kzalloc(sizeof(az), GFP_KERNEL);
e697e12e	74
3088fba8	75	return az ? &az->isa : NULL;
1da177e4 LT	76	}
1da177e4 LT	77
3088fba8	78	static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)
1da177e4	79	{
3088fba8	80	struct aztech *az = container_of(isa, struct aztech, isa);
1da177e4 LT	81	int i;
1da177e4 LT	82
3088fba8 HV	83	freq += 171200; /* Add 10.7 MHz IF */
3088fba8 HV	84	freq /= 800; /* Convert to 50 kHz units */
4286c6f6	85
e697e12e	86	send_0_byte(az); /* 0: LSB of frequency */
1da177e4 LT	87
1da177e4 LT	88	for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
3088fba8	89	if (freq & (1 << i))
e697e12e	90	send_1_byte(az);
1da177e4	91	else
e697e12e	92	send_0_byte(az);
1da177e4	93
e697e12e HV	94	send_0_byte(az); /* 14: test bit - always 0 */
	95	send_0_byte(az); /* 15: test bit - always 0 */
	96	send_0_byte(az); /* 16: band data 0 - always 0 */
3088fba8	97	if (isa->stereo) /* 17: stereo (1 to enable) */
e697e12e	98	send_1_byte(az);
1da177e4	99	else
e697e12e	100	send_0_byte(az);
1da177e4	101
e697e12e HV	102	send_1_byte(az); /* 18: band data 1 - unknown */
	103	send_0_byte(az); /* 19: time base - always 0 */
	104	send_0_byte(az); /* 20: spacing (0 = 25 kHz) */
	105	send_1_byte(az); /* 21: spacing (1 = 25 kHz) */
	106	send_0_byte(az); /* 22: spacing (0 = 25 kHz) */
	107	send_1_byte(az); /* 23: AM/FM (FM = 1, always) */
1da177e4 LT	108
	109	/* latch frequency */
	110
e697e12e	111	udelay(radio_wait_time);
3088fba8	112	outb_p(128 + 64 + az->curvol, az->isa.io);
676b0ac7	113
a0c05ab9 MCC	114	return 0;
	115	}
	116
3088fba8 HV	117	/* thanks to Michael Dwyer for giving me a dose of clues in
	118	* the signal strength department..
	119	*
	120	* This card has a stereo bit - bit 0 set = mono, not set = stereo
	121	*/
	122	static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)
e697e12e	123	{
3088fba8 HV	124	if (inb(isa->io) & 1)
	125	return V4L2_TUNER_SUB_MONO;
	126	return V4L2_TUNER_SUB_STEREO;
e697e12e HV	127	}
e697e12e HV	128
3088fba8	129	static int aztech_s_stereo(struct radio_isa_card *isa, bool stereo)
99218fe4	130	{
3088fba8	131	return aztech_s_frequency(isa, isa->freq);
99218fe4 MCC	132	}
99218fe4 MCC	133
3088fba8	134	static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
99218fe4	135	{
3088fba8	136	struct aztech *az = container_of(isa, struct aztech, isa);
99218fe4	137
3088fba8 HV	138	if (mute)
	139	vol = 0;
	140	az->curvol = (vol & 1) + ((vol & 2) << 1);
	141	outb(az->curvol, isa->io);
99218fe4 MCC	142	return 0;
	143	}
	144
3088fba8 HV	145	static const struct radio_isa_ops aztech_ops = {
	146	.alloc = aztech_alloc,
	147	.s_mute_volume = aztech_s_mute_volume,
	148	.s_frequency = aztech_s_frequency,
	149	.s_stereo = aztech_s_stereo,
	150	.g_rxsubchans = aztech_g_rxsubchans,
1da177e4 LT	151	};
1da177e4 LT	152
3088fba8 HV	153	static const int aztech_ioports[] = { 0x350, 0x358 };
	154
	155	static struct radio_isa_driver aztech_driver = {
	156	.driver = {
	157	.match = radio_isa_match,
	158	.probe = radio_isa_probe,
	159	.remove = radio_isa_remove,
	160	.driver = {
	161	.name = "radio-aztech",
	162	},
	163	},
	164	.io_params = io,
	165	.radio_nr_params = radio_nr,
	166	.io_ports = aztech_ioports,
	167	.num_of_io_ports = ARRAY_SIZE(aztech_ioports),
	168	.region_size = 2,
	169	.card = "Aztech Radio",
	170	.ops = &aztech_ops,
	171	.has_stereo = true,
	172	.max_volume = 3,
1da177e4 LT	173	};
	174
	175	static int __init aztech_init(void)
	176	{
3088fba8	177	return isa_register_driver(&aztech_driver.driver, AZTECH_MAX);
1da177e4 LT	178	}
1da177e4 LT	179
e697e12e	180	static void __exit aztech_exit(void)
1da177e4	181	{
3088fba8	182	isa_unregister_driver(&aztech_driver.driver);
1da177e4 LT	183	}
	184
	185	module_init(aztech_init);
e697e12e	186	module_exit(aztech_exit);