Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 195 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c
new file mode 100644
index 0000000000..0e9a378772
--- /dev/null
+++ b/drivers/media/radio/radio-aimslab.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AimsLab RadioTrack (aka RadioVeveal) driver
+ *
+ * Copyright 1997 M. Kirkwood
+ *
+ * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
+ * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>
+ * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
+ * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
+ *
+ * Notes on the hardware (reverse engineered from other peoples'
+ * reverse engineering of AIMS' code :-)
+ *
+ *  Frequency control is done digitally -- ie out(port,encodefreq(95.8));
+ *
+ *  The signal strength query is unsurprisingly inaccurate.  And it seems
+ *  to indicate that (on my card, at least) the frequency setting isn't
+ *  too great.  (I have to tune up .025MHz from what the freq should be
+ *  to get a report that the thing is tuned.)
+ *
+ *  Volume control is (ugh) analogue:
+ *   out(port, start_increasing_volume);
+ *   wait(a_wee_while);
+ *   out(port, stop_changing_the_volume);
+ *
+ * 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>	/* msleep			*/
+#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"
+#include "lm7000.h"
+
+MODULE_AUTHOR("M. Kirkwood");
+MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0.0");
+
+#ifndef CONFIG_RADIO_RTRACK_PORT
+#define CONFIG_RADIO_RTRACK_PORT -1
+#endif
+
+#define RTRACK_MAX 2
+
+static int io[RTRACK_MAX] = { [0] = CONFIG_RADIO_RTRACK_PORT,
+			      [1 ... (RTRACK_MAX - 1)] = -1 };
+static int radio_nr[RTRACK_MAX]	= { [0 ... (RTRACK_MAX - 1)] = -1 };
+
+module_param_array(io, int, NULL, 0444);
+MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)");
+module_param_array(radio_nr, int, NULL, 0444);
+MODULE_PARM_DESC(radio_nr, "Radio device numbers");
+
+struct rtrack {
+	struct radio_isa_card isa;
+	int curvol;
+};
+
+static struct radio_isa_card *rtrack_alloc(void)
+{
+	struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL);
+
+	if (rt)
+		rt->curvol = 0xff;
+	return rt ? &rt->isa : NULL;
+}
+
+#define AIMS_BIT_TUN_CE		(1 << 0)
+#define AIMS_BIT_TUN_CLK	(1 << 1)
+#define AIMS_BIT_TUN_DATA	(1 << 2)
+#define AIMS_BIT_VOL_CE		(1 << 3)
+#define AIMS_BIT_TUN_STRQ	(1 << 4)
+/* bit 5 is not connected */
+#define AIMS_BIT_VOL_UP		(1 << 6)	/* active low */
+#define AIMS_BIT_VOL_DN		(1 << 7)	/* active low */
+
+static void rtrack_set_pins(void *handle, u8 pins)
+{
+	struct radio_isa_card *isa = handle;
+	struct rtrack *rt = container_of(isa, struct rtrack, isa);
+	u8 bits = AIMS_BIT_VOL_DN | AIMS_BIT_VOL_UP | AIMS_BIT_TUN_STRQ;
+
+	if (!v4l2_ctrl_g_ctrl(rt->isa.mute))
+		bits |= AIMS_BIT_VOL_CE;
+
+	if (pins & LM7000_DATA)
+		bits |= AIMS_BIT_TUN_DATA;
+	if (pins & LM7000_CLK)
+		bits |= AIMS_BIT_TUN_CLK;
+	if (pins & LM7000_CE)
+		bits |= AIMS_BIT_TUN_CE;
+
+	outb_p(bits, rt->isa.io);
+}
+
+static int rtrack_s_frequency(struct radio_isa_card *isa, u32 freq)
+{
+	lm7000_set_freq(freq, isa, rtrack_set_pins);
+
+	return 0;
+}
+
+static u32 rtrack_g_signal(struct radio_isa_card *isa)
+{
+	/* bit set = no signal present */
+	return 0xffff * !(inb(isa->io) & 2);
+}
+
+static int rtrack_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
+{
+	struct rtrack *rt = container_of(isa, struct rtrack, isa);
+	int curvol = rt->curvol;
+
+	if (mute) {
+		outb(0xd0, isa->io);	/* volume steady + sigstr + off	*/
+		return 0;
+	}
+	if (vol == 0) {			/* volume = 0 means mute the card */
+		outb(0x48, isa->io);	/* volume down but still "on"	*/
+		msleep(curvol * 3);	/* make sure it's totally down	*/
+	} else if (curvol < vol) {
+		outb(0x98, isa->io);	/* volume up + sigstr + on	*/
+		for (; curvol < vol; curvol++)
+			mdelay(3);
+	} else if (curvol > vol) {
+		outb(0x58, isa->io);	/* volume down + sigstr + on	*/
+		for (; curvol > vol; curvol--)
+			mdelay(3);
+	}
+	outb(0xd8, isa->io);		/* volume steady + sigstr + on	*/
+	rt->curvol = vol;
+	return 0;
+}
+
+/* Mute card - prevents noisy bootups */
+static int rtrack_initialize(struct radio_isa_card *isa)
+{
+	/* this ensures that the volume is all the way up  */
+	outb(0x90, isa->io);	/* volume up but still "on"	*/
+	msleep(3000);		/* make sure it's totally up	*/
+	outb(0xc0, isa->io);	/* steady volume, mute card	*/
+	return 0;
+}
+
+static const struct radio_isa_ops rtrack_ops = {
+	.alloc = rtrack_alloc,
+	.init = rtrack_initialize,
+	.s_mute_volume = rtrack_s_mute_volume,
+	.s_frequency = rtrack_s_frequency,
+	.g_signal = rtrack_g_signal,
+};
+
+static const int rtrack_ioports[] = { 0x20f, 0x30f };
+
+static struct radio_isa_driver rtrack_driver = {
+	.driver = {
+		.match		= radio_isa_match,
+		.probe		= radio_isa_probe,
+		.remove		= radio_isa_remove,
+		.driver		= {
+			.name	= "radio-aimslab",
+		},
+	},
+	.io_params = io,
+	.radio_nr_params = radio_nr,
+	.io_ports = rtrack_ioports,
+	.num_of_io_ports = ARRAY_SIZE(rtrack_ioports),
+	.region_size = 2,
+	.card = "AIMSlab RadioTrack/RadioReveal",
+	.ops = &rtrack_ops,
+	.has_stereo = true,
+	.max_volume = 0xff,
+};
+
+static int __init rtrack_init(void)
+{
+	return isa_register_driver(&rtrack_driver.driver, RTRACK_MAX);
+}
+
+static void __exit rtrack_exit(void)
+{
+	isa_unregister_driver(&rtrack_driver.driver);
+}
+
+module_init(rtrack_init);
+module_exit(rtrack_exit);