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Diffstat (limited to 'drivers/media/radio/radio-gemtek.c')
-rw-r--r--drivers/media/radio/radio-gemtek.c494
1 files changed, 99 insertions, 395 deletions
diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
index 36ce0611c037..2e639ce6f256 100644
--- a/drivers/media/radio/radio-gemtek.c
+++ b/drivers/media/radio/radio-gemtek.c
@@ -1,4 +1,7 @@
-/* GemTek radio card driver for Linux (C) 1998 Jonas Munsin <jmunsin@iki.fi>
+/*
+ * 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.
@@ -11,9 +14,12 @@
* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
*
- * TODO: Allow for more than one of these foolish entities :-)
- *
+ * 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 */
@@ -23,8 +29,10 @@
#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-ioctl.h>
#include <media/v4l2-device.h>
+#include "radio-isa.h"
/*
* Module info.
@@ -33,7 +41,7 @@
MODULE_AUTHOR("Jonas Munsin, Pekka Seppänen <pexu@kapsi.fi>");
MODULE_DESCRIPTION("A driver for the GemTek Radio card.");
MODULE_LICENSE("GPL");
-MODULE_VERSION("0.0.4");
+MODULE_VERSION("1.0.0");
/*
* Module params.
@@ -46,45 +54,29 @@ MODULE_VERSION("0.0.4");
#define CONFIG_RADIO_GEMTEK_PROBE 1
#endif
-static int io = CONFIG_RADIO_GEMTEK_PORT;
-static bool probe = CONFIG_RADIO_GEMTEK_PROBE;
-static bool hardmute;
-static bool shutdown = 1;
-static bool keepmuted = 1;
-static bool initmute = 1;
-static int radio_nr = -1;
+#define GEMTEK_MAX 4
-module_param(io, int, 0444);
-MODULE_PARM_DESC(io, "Force I/O port 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).");
+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. Note: only the most "
- "common I/O ports used by the card are probed.");
+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 "
+MODULE_PARM_DESC(hardmute, "Enable 'hard muting' by shutting down PLL, may "
"reduce static noise.");
-module_param(shutdown, bool, 0644);
-MODULE_PARM_DESC(shutdown, "Enable shutting down PLL and muting line when "
- "module is unloaded.");
-
-module_param(keepmuted, bool, 0644);
-MODULE_PARM_DESC(keepmuted, "Keep card muted even when frequency is changed.");
-
-module_param(initmute, bool, 0444);
-MODULE_PARM_DESC(initmute, "Mute card when module is loaded.");
-
-module_param(radio_nr, int, 0444);
+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).");
-/*
- * Functions for controlling the card.
- */
-#define GEMTEK_LOWFREQ (87*16000)
-#define GEMTEK_HIGHFREQ (108*16000)
+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
@@ -108,18 +100,11 @@ module_param(radio_nr, int, 0444);
#define LONG_DELAY 75 /* usec */
struct gemtek {
- struct v4l2_device v4l2_dev;
- struct video_device vdev;
- struct mutex lock;
- unsigned long lastfreq;
- int muted;
- int verified;
- int io;
+ struct radio_isa_card isa;
+ bool muted;
u32 bu2614data;
};
-static struct gemtek gemtek_card;
-
#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 */
@@ -166,31 +151,24 @@ static struct gemtek gemtek_card;
*/
static void gemtek_bu2614_transmit(struct gemtek *gt)
{
+ struct radio_isa_card *isa = &gt->isa;
int i, bit, q, mute;
- mutex_lock(&gt->lock);
-
mute = gt->muted ? GEMTEK_MT : 0x00;
- outb_p(mute | GEMTEK_DA | GEMTEK_CK, gt->io);
- udelay(SHORT_DELAY);
- outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, gt->io);
+ 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, gt->io);
+ outb_p(mute | GEMTEK_CE | bit, isa->io);
udelay(SHORT_DELAY);
- outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, gt->io);
+ outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, isa->io);
udelay(SHORT_DELAY);
}
- outb_p(mute | GEMTEK_DA | GEMTEK_CK, gt->io);
+ outb_p(mute | GEMTEK_DA | GEMTEK_CK, isa->io);
udelay(SHORT_DELAY);
- outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, gt->io);
- udelay(LONG_DELAY);
-
- mutex_unlock(&gt->lock);
}
/*
@@ -198,21 +176,27 @@ static void gemtek_bu2614_transmit(struct gemtek *gt)
*/
static unsigned long gemtek_convfreq(unsigned long freq)
{
- return ((freq<<FSCALE) + IF_OFFSET + REF_FREQ/2) / REF_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 void gemtek_setfreq(struct gemtek *gt, unsigned long freq)
+static int gemtek_s_frequency(struct radio_isa_card *isa, u32 freq)
{
- if (keepmuted && hardmute && gt->muted)
- return;
+ struct gemtek *gt = container_of(isa, struct gemtek, isa);
- freq = clamp_val(freq, GEMTEK_LOWFREQ, GEMTEK_HIGHFREQ);
-
- gt->lastfreq = freq;
- gt->muted = 0;
+ if (hardmute && gt->muted)
+ return 0;
gemtek_bu2614_set(gt, BU2614_PORT, 0);
gemtek_bu2614_set(gt, BU2614_FMES, 0);
@@ -220,23 +204,25 @@ static void gemtek_setfreq(struct gemtek *gt, unsigned long freq)
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 void gemtek_mute(struct gemtek *gt)
+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 = 1;
-
+ 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 */
@@ -247,367 +233,85 @@ static void gemtek_mute(struct gemtek *gt)
gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_PLL_OFF);
gemtek_bu2614_set(gt, BU2614_FREQ, 0);
gemtek_bu2614_transmit(gt);
- return;
+ return 0;
}
- mutex_lock(&gt->lock);
-
/* Read bus contents (CE, CK and DA). */
- i = inb_p(gt->io);
+ i = inb_p(isa->io);
/* Write it back with mute flag set. */
- outb_p((i >> 5) | GEMTEK_MT, gt->io);
+ outb_p((i >> 5) | (mute ? GEMTEK_MT : 0), isa->io);
udelay(SHORT_DELAY);
-
- mutex_unlock(&gt->lock);
-}
-
-/*
- * Unset mute flag.
- */
-static void gemtek_unmute(struct gemtek *gt)
-{
- int i;
-
- gt->muted = 0;
- if (hardmute) {
- /* Turn PLL back on. */
- gemtek_setfreq(gt, gt->lastfreq);
- return;
- }
- mutex_lock(&gt->lock);
-
- i = inb_p(gt->io);
- outb_p(i >> 5, gt->io);
- udelay(SHORT_DELAY);
-
- mutex_unlock(&gt->lock);
+ return 0;
}
-/*
- * Get signal strength (= stereo status).
- */
-static inline int gemtek_getsigstr(struct gemtek *gt)
+static u32 gemtek_g_rxsubchans(struct radio_isa_card *isa)
{
- int sig;
-
- mutex_lock(&gt->lock);
- sig = inb_p(gt->io) & GEMTEK_NS ? 0 : 1;
- mutex_unlock(&gt->lock);
- return sig;
+ 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 int gemtek_verify(struct gemtek *gt, int port)
+static bool gemtek_probe(struct radio_isa_card *isa, int io)
{
int i, q;
- if (gt->verified == port)
- return 1;
-
- mutex_lock(&gt->lock);
-
- q = inb_p(port); /* Read bus contents before probing. */
+ 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, port);
+ outb_p(1 << i, io);
udelay(SHORT_DELAY);
- if ((inb_p(port) & (~GEMTEK_NS)) != (0x17 | (1 << (i + 5)))) {
- mutex_unlock(&gt->lock);
- return 0;
- }
+ if ((inb_p(io) & ~GEMTEK_NS) != (0x17 | (1 << (i + 5))))
+ return false;
}
- outb_p(q >> 5, port); /* Write bus contents back. */
+ outb_p(q >> 5, io); /* Write bus contents back. */
udelay(SHORT_DELAY);
-
- mutex_unlock(&gt->lock);
- gt->verified = port;
-
- return 1;
-}
-
-/*
- * Automatic probing for card.
- */
-static int gemtek_probe(struct gemtek *gt)
-{
- struct v4l2_device *v4l2_dev = &gt->v4l2_dev;
- int ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };
- int i;
-
- if (!probe) {
- v4l2_info(v4l2_dev, "Automatic device probing disabled.\n");
- return -1;
- }
-
- v4l2_info(v4l2_dev, "Automatic device probing enabled.\n");
-
- for (i = 0; i < ARRAY_SIZE(ioports); ++i) {
- v4l2_info(v4l2_dev, "Trying I/O port 0x%x...\n", ioports[i]);
-
- if (!request_region(ioports[i], 1, "gemtek-probe")) {
- v4l2_warn(v4l2_dev, "I/O port 0x%x busy!\n",
- ioports[i]);
- continue;
- }
-
- if (gemtek_verify(gt, ioports[i])) {
- v4l2_info(v4l2_dev, "Card found from I/O port "
- "0x%x!\n", ioports[i]);
-
- release_region(ioports[i], 1);
- gt->io = ioports[i];
- return gt->io;
- }
-
- release_region(ioports[i], 1);
- }
-
- v4l2_err(v4l2_dev, "Automatic probing failed!\n");
- return -1;
+ return true;
}
-/*
- * Video 4 Linux stuff.
- */
-
-static const struct v4l2_file_operations gemtek_fops = {
- .owner = THIS_MODULE,
- .unlocked_ioctl = video_ioctl2,
+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 int vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *v)
-{
- strlcpy(v->driver, "radio-gemtek", sizeof(v->driver));
- strlcpy(v->card, "GemTek", sizeof(v->card));
- strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
- v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
- return 0;
-}
-
-static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
-{
- struct gemtek *gt = video_drvdata(file);
-
- if (v->index > 0)
- return -EINVAL;
-
- strlcpy(v->name, "FM", sizeof(v->name));
- v->type = V4L2_TUNER_RADIO;
- v->rangelow = GEMTEK_LOWFREQ;
- v->rangehigh = GEMTEK_HIGHFREQ;
- v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
- v->signal = 0xffff * gemtek_getsigstr(gt);
- if (v->signal) {
- v->audmode = V4L2_TUNER_MODE_STEREO;
- v->rxsubchans = V4L2_TUNER_SUB_STEREO;
- } else {
- v->audmode = V4L2_TUNER_MODE_MONO;
- v->rxsubchans = V4L2_TUNER_SUB_MONO;
- }
- return 0;
-}
-
-static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
-{
- return (v->index != 0) ? -EINVAL : 0;
-}
-
-static int vidioc_g_frequency(struct file *file, void *priv,
- struct v4l2_frequency *f)
-{
- struct gemtek *gt = video_drvdata(file);
-
- if (f->tuner != 0)
- return -EINVAL;
- f->type = V4L2_TUNER_RADIO;
- f->frequency = gt->lastfreq;
- return 0;
-}
-
-static int vidioc_s_frequency(struct file *file, void *priv,
- struct v4l2_frequency *f)
-{
- struct gemtek *gt = video_drvdata(file);
-
- if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
- return -EINVAL;
- gemtek_setfreq(gt, f->frequency);
- return 0;
-}
-
-static int vidioc_queryctrl(struct file *file, void *priv,
- struct v4l2_queryctrl *qc)
-{
- switch (qc->id) {
- case V4L2_CID_AUDIO_MUTE:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
- default:
- return -EINVAL;
- }
-}
-
-static int vidioc_g_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct gemtek *gt = video_drvdata(file);
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- ctrl->value = gt->muted;
- return 0;
- }
- return -EINVAL;
-}
-
-static int vidioc_s_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct gemtek *gt = video_drvdata(file);
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- if (ctrl->value)
- gemtek_mute(gt);
- else
- gemtek_unmute(gt);
- return 0;
- }
- return -EINVAL;
-}
-
-static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
-{
- *i = 0;
- return 0;
-}
-
-static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
-{
- return (i != 0) ? -EINVAL : 0;
-}
-
-static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
-{
- a->index = 0;
- strlcpy(a->name, "Radio", sizeof(a->name));
- a->capability = V4L2_AUDCAP_STEREO;
- return 0;
-}
-
-static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
-{
- return (a->index != 0) ? -EINVAL : 0;
-}
-
-static const struct v4l2_ioctl_ops gemtek_ioctl_ops = {
- .vidioc_querycap = vidioc_querycap,
- .vidioc_g_tuner = vidioc_g_tuner,
- .vidioc_s_tuner = vidioc_s_tuner,
- .vidioc_g_audio = vidioc_g_audio,
- .vidioc_s_audio = vidioc_s_audio,
- .vidioc_g_input = vidioc_g_input,
- .vidioc_s_input = vidioc_s_input,
- .vidioc_g_frequency = vidioc_g_frequency,
- .vidioc_s_frequency = vidioc_s_frequency,
- .vidioc_queryctrl = vidioc_queryctrl,
- .vidioc_g_ctrl = vidioc_g_ctrl,
- .vidioc_s_ctrl = vidioc_s_ctrl
+static const int gemtek_ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };
+
+static struct radio_isa_driver gemtek_driver = {
+ .driver = {
+ .match = radio_isa_match,
+ .probe = radio_isa_probe,
+ .remove = radio_isa_remove,
+ .driver = {
+ .name = "radio-gemtek",
+ },
+ },
+ .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,
};
-/*
- * Initialization / cleanup related stuff.
- */
-
static int __init gemtek_init(void)
{
- struct gemtek *gt = &gemtek_card;
- struct v4l2_device *v4l2_dev = &gt->v4l2_dev;
- int res;
-
- strlcpy(v4l2_dev->name, "gemtek", sizeof(v4l2_dev->name));
-
- v4l2_info(v4l2_dev, "GemTek Radio card driver: v0.0.3\n");
-
- mutex_init(&gt->lock);
-
- gt->verified = -1;
- gt->io = io;
- gemtek_probe(gt);
- if (gt->io) {
- if (!request_region(gt->io, 1, "gemtek")) {
- v4l2_err(v4l2_dev, "I/O port 0x%x already in use.\n", gt->io);
- return -EBUSY;
- }
-
- if (!gemtek_verify(gt, gt->io))
- v4l2_warn(v4l2_dev, "Card at I/O port 0x%x does not "
- "respond properly, check your "
- "configuration.\n", gt->io);
- else
- v4l2_info(v4l2_dev, "Using I/O port 0x%x.\n", gt->io);
- } else if (probe) {
- v4l2_err(v4l2_dev, "Automatic probing failed and no "
- "fixed I/O port defined.\n");
- return -ENODEV;
- } else {
- v4l2_err(v4l2_dev, "Automatic probing disabled but no fixed "
- "I/O port defined.");
- return -EINVAL;
- }
-
- res = v4l2_device_register(NULL, v4l2_dev);
- if (res < 0) {
- v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
- release_region(gt->io, 1);
- return res;
- }
-
- strlcpy(gt->vdev.name, v4l2_dev->name, sizeof(gt->vdev.name));
- gt->vdev.v4l2_dev = v4l2_dev;
- gt->vdev.fops = &gemtek_fops;
- gt->vdev.ioctl_ops = &gemtek_ioctl_ops;
- gt->vdev.release = video_device_release_empty;
- video_set_drvdata(&gt->vdev, gt);
-
- /* Set defaults */
- gt->lastfreq = GEMTEK_LOWFREQ;
- gt->bu2614data = 0;
-
- if (initmute)
- gemtek_mute(gt);
-
- if (video_register_device(&gt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
- v4l2_device_unregister(v4l2_dev);
- release_region(gt->io, 1);
- return -EBUSY;
- }
-
- return 0;
+ gemtek_driver.probe = probe;
+ return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX);
}
-/*
- * Module cleanup
- */
static void __exit gemtek_exit(void)
{
- struct gemtek *gt = &gemtek_card;
- struct v4l2_device *v4l2_dev = &gt->v4l2_dev;
-
- if (shutdown) {
- hardmute = 1; /* Turn off PLL */
- gemtek_mute(gt);
- } else {
- v4l2_info(v4l2_dev, "Module unloaded but card not muted!\n");
- }
-
- video_unregister_device(&gt->vdev);
- v4l2_device_unregister(&gt->v4l2_dev);
- release_region(gt->io, 1);
+ hardmute = 1; /* Turn off PLL */
+ isa_unregister_driver(&gemtek_driver.driver);
}
module_init(gemtek_init);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.