Initial import

1 files changed, 170 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-terratec.c b/drivers/media/radio/radio-terratec.c
new file mode 100644
index 000000000..be10a802e
--- /dev/null
+++ b/drivers/media/radio/radio-terratec.c
@@ -0,0 +1,170 @@
+/* Terratec ActiveRadio ISA Standalone card driver for Linux radio support
+ * (c) 1999 R. Offermanns (rolf@offermanns.de)
+ * based on the aimslab radio driver from M. Kirkwood
+ * many thanks to Michael Becker and Friedhelm Birth (from TerraTec)
+ *
+ *
+ * History:
+ * 1999-05-21	First preview release
+ *
+ *  Notes on the hardware:
+ *  There are two "main" chips on the card:
+ *  - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf)
+ *  - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf)
+ *  (you can get the datasheet at the above links)
+ *
+ *  Frequency control is done digitally -- ie out(port,encodefreq(95.8));
+ *  Volume Control is done digitally
+ *
+ * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
+ * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
+ */
+
+#include <linux/module.h>	/* Modules 			*/
+#include <linux/init.h>		/* Initdata			*/
+#include <linux/ioport.h>	/* request_region		*/
+#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-device.h>
+#include <media/v4l2-ioctl.h>
+#include "radio-isa.h"
+
+MODULE_AUTHOR("R. Offermans & others");
+MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.1.99");
+
+/* Note: there seems to be only one possible port (0x590), but without
+   hardware this is hard to verify. For now, this is the only one we will
+   support. */
+static int io = 0x590;
+static int radio_nr = -1;
+
+module_param(radio_nr, int, 0444);
+MODULE_PARM_DESC(radio_nr, "Radio device number");
+
+#define WRT_DIS 	0x00
+#define CLK_OFF		0x00
+#define IIC_DATA	0x01
+#define IIC_CLK		0x02
+#define DATA		0x04
+#define CLK_ON 		0x08
+#define WRT_EN		0x10
+
+static struct radio_isa_card *terratec_alloc(void)
+{
+	return kzalloc(sizeof(struct radio_isa_card), GFP_KERNEL);
+}
+
+static int terratec_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
+{
+	int i;
+
+	if (mute)
+		vol = 0;
+	vol = vol + (vol * 32); /* change both channels */
+	for (i = 0; i < 8; i++) {
+		if (vol & (0x80 >> i))
+			outb(0x80, isa->io + 1);
+		else
+			outb(0x00, isa->io + 1);
+	}
+	return 0;
+}
+
+
+/* this is the worst part in this driver */
+/* many more or less strange things are going on here, but hey, it works :) */
+
+static int terratec_s_frequency(struct radio_isa_card *isa, u32 freq)
+{
+	int i;
+	int p;
+	int temp;
+	long rest;
+	unsigned char buffer[25];		/* we have to bit shift 25 registers */
+
+	freq = freq / 160;			/* convert the freq. to a nice to handle value */
+	memset(buffer, 0, sizeof(buffer));
+
+	rest = freq * 10 + 10700;	/* I once had understood what is going on here */
+					/* maybe some wise guy (friedhelm?) can comment this stuff */
+	i = 13;
+	p = 10;
+	temp = 102400;
+	while (rest != 0) {
+		if (rest % temp  == rest)
+			buffer[i] = 0;
+		else {
+			buffer[i] = 1;
+			rest = rest - temp;
+		}
+		i--;
+		p--;
+		temp = temp / 2;
+	}
+
+	for (i = 24; i > -1; i--) {	/* bit shift the values to the radiocard */
+		if (buffer[i] == 1) {
+			outb(WRT_EN | DATA, isa->io);
+			outb(WRT_EN | DATA | CLK_ON, isa->io);
+			outb(WRT_EN | DATA, isa->io);
+		} else {
+			outb(WRT_EN | 0x00, isa->io);
+			outb(WRT_EN | 0x00 | CLK_ON, isa->io);
+		}
+	}
+	outb(0x00, isa->io);
+	return 0;
+}
+
+static u32 terratec_g_signal(struct radio_isa_card *isa)
+{
+	/* bit set = no signal present	*/
+	return (inb(isa->io) & 2) ? 0 : 0xffff;
+}
+
+static const struct radio_isa_ops terratec_ops = {
+	.alloc = terratec_alloc,
+	.s_mute_volume = terratec_s_mute_volume,
+	.s_frequency = terratec_s_frequency,
+	.g_signal = terratec_g_signal,
+};
+
+static const int terratec_ioports[] = { 0x590 };
+
+static struct radio_isa_driver terratec_driver = {
+	.driver = {
+		.match		= radio_isa_match,
+		.probe		= radio_isa_probe,
+		.remove		= radio_isa_remove,
+		.driver		= {
+			.name	= "radio-terratec",
+		},
+	},
+	.io_params = &io,
+	.radio_nr_params = &radio_nr,
+	.io_ports = terratec_ioports,
+	.num_of_io_ports = ARRAY_SIZE(terratec_ioports),
+	.region_size = 2,
+	.card = "TerraTec ActiveRadio",
+	.ops = &terratec_ops,
+	.has_stereo = true,
+	.max_volume = 10,
+};
+
+static int __init terratec_init(void)
+{
+	return isa_register_driver(&terratec_driver.driver, 1);
+}
+
+static void __exit terratec_exit(void)
+{
+	isa_unregister_driver(&terratec_driver.driver);
+}
+
+module_init(terratec_init);
+module_exit(terratec_exit);
+