Initial import

1 files changed, 343 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
new file mode 100644
index 000000000..cff1eb144
--- /dev/null
+++ b/drivers/media/radio/radio-gemtek.c
@@ -0,0 +1,343 @@
+/*
+ * 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/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 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);