--- /dev/null
+/*
+ * 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@infradead.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);
Code Review / kvmfornfv.git / blobdiff