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path: root/drivers/media/radio/radio-sf16fmi.c
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Diffstat (limited to 'drivers/media/radio/radio-sf16fmi.c')
-rw-r--r--drivers/media/radio/radio-sf16fmi.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c
new file mode 100644
index 0000000..329c90b
--- /dev/null
+++ b/drivers/media/radio/radio-sf16fmi.c
@@ -0,0 +1,416 @@
+/* SF16FMI radio driver for Linux radio support
+ * heavily based on rtrack driver...
+ * (c) 1997 M. Kirkwood
+ * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
+ *
+ * Fitted to new interface by Alan Cox <alan.cox@linux.org>
+ * Made working and cleaned up functions <mikael.hedin@irf.se>
+ * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
+ *
+ * Notes on the hardware
+ *
+ * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
+ * No volume control - only mute/unmute - you have to use line volume
+ * control on SB-part of SF16FMI
+ *
+ * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
+ */
+
+#include <linux/version.h>
+#include <linux/kernel.h> /* __setup */
+#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 <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <linux/isapnp.h>
+#include <asm/io.h> /* outb, outb_p */
+#include <asm/uaccess.h> /* copy to/from user */
+#include <linux/mutex.h>
+
+#define RADIO_VERSION KERNEL_VERSION(0,0,2)
+
+static struct v4l2_queryctrl radio_qctrl[] = {
+ {
+ .id = V4L2_CID_AUDIO_MUTE,
+ .name = "Mute",
+ .minimum = 0,
+ .maximum = 1,
+ .default_value = 1,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ }
+};
+
+struct fmi_device
+{
+ unsigned long in_use;
+ int port;
+ int curvol; /* 1 or 0 */
+ unsigned long curfreq; /* freq in kHz */
+ __u32 flags;
+};
+
+static int io = -1;
+static int radio_nr = -1;
+static struct pnp_dev *dev = NULL;
+static struct mutex lock;
+
+/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
+/* It is only useful to give freq in intervall of 800 (=0.05Mhz),
+ * other bits will be truncated, e.g 92.7400016 -> 92.7, but
+ * 92.7400017 -> 92.75
+ */
+#define RSF16_ENCODE(x) ((x)/800+214)
+#define RSF16_MINFREQ 87*16000
+#define RSF16_MAXFREQ 108*16000
+
+static void outbits(int bits, unsigned int data, int port)
+{
+ while(bits--) {
+ if(data & 1) {
+ outb(5, port);
+ udelay(6);
+ outb(7, port);
+ udelay(6);
+ } else {
+ outb(1, port);
+ udelay(6);
+ outb(3, port);
+ udelay(6);
+ }
+ data>>=1;
+ }
+}
+
+static inline void fmi_mute(int port)
+{
+ mutex_lock(&lock);
+ outb(0x00, port);
+ mutex_unlock(&lock);
+}
+
+static inline void fmi_unmute(int port)
+{
+ mutex_lock(&lock);
+ outb(0x08, port);
+ mutex_unlock(&lock);
+}
+
+static inline int fmi_setfreq(struct fmi_device *dev)
+{
+ int myport = dev->port;
+ unsigned long freq = dev->curfreq;
+
+ mutex_lock(&lock);
+
+ outbits(16, RSF16_ENCODE(freq), myport);
+ outbits(8, 0xC0, myport);
+ msleep(143); /* was schedule_timeout(HZ/7) */
+ mutex_unlock(&lock);
+ if (dev->curvol) fmi_unmute(myport);
+ return 0;
+}
+
+static inline int fmi_getsigstr(struct fmi_device *dev)
+{
+ int val;
+ int res;
+ int myport = dev->port;
+
+
+ mutex_lock(&lock);
+ val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */
+ outb(val, myport);
+ outb(val | 0x10, myport);
+ msleep(143); /* was schedule_timeout(HZ/7) */
+ res = (int)inb(myport+1);
+ outb(val, myport);
+
+ mutex_unlock(&lock);
+ return (res & 2) ? 0 : 0xFFFF;
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
+ strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
+ sprintf(v->bus_info, "ISA");
+ v->version = RADIO_VERSION;
+ v->capabilities = V4L2_CAP_TUNER;
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ int mult;
+ struct fmi_device *fmi = video_drvdata(file);
+
+ if (v->index > 0)
+ return -EINVAL;
+
+ strcpy(v->name, "FM");
+ v->type = V4L2_TUNER_RADIO;
+ mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
+ v->rangelow = RSF16_MINFREQ/mult;
+ v->rangehigh = RSF16_MAXFREQ/mult;
+ v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
+ v->capability = fmi->flags&V4L2_TUNER_CAP_LOW;
+ v->audmode = V4L2_TUNER_MODE_STEREO;
+ v->signal = fmi_getsigstr(fmi);
+ return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ if (v->index > 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct fmi_device *fmi = video_drvdata(file);
+
+ if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
+ f->frequency *= 1000;
+ if (f->frequency < RSF16_MINFREQ ||
+ f->frequency > RSF16_MAXFREQ )
+ return -EINVAL;
+ /*rounding in steps of 800 to match th freq
+ that will be used */
+ fmi->curfreq = (f->frequency/800)*800;
+ fmi_setfreq(fmi);
+ return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct fmi_device *fmi = video_drvdata(file);
+
+ f->type = V4L2_TUNER_RADIO;
+ f->frequency = fmi->curfreq;
+ if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
+ f->frequency /= 1000;
+ return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
+ if (qc->id && qc->id == radio_qctrl[i].id) {
+ memcpy(qc, &(radio_qctrl[i]),
+ sizeof(*qc));
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct fmi_device *fmi = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = fmi->curvol;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct fmi_device *fmi = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ if (ctrl->value)
+ fmi_mute(fmi->port);
+ else
+ fmi_unmute(fmi->port);
+ fmi->curvol = ctrl->value;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_audio(struct file *file, void *priv,
+ struct v4l2_audio *a)
+{
+ if (a->index > 1)
+ return -EINVAL;
+
+ strcpy(a->name, "Radio");
+ a->capability = V4L2_AUDCAP_STEREO;
+ return 0;
+}
+
+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)
+{
+ if (i != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int vidioc_s_audio(struct file *file, void *priv,
+ struct v4l2_audio *a)
+{
+ if (a->index != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static struct fmi_device fmi_unit;
+
+static int fmi_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &fmi_unit.in_use) ? -EBUSY : 0;
+}
+
+static int fmi_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &fmi_unit.in_use);
+ return 0;
+}
+
+static const struct file_operations fmi_fops = {
+ .owner = THIS_MODULE,
+ .open = fmi_exclusive_open,
+ .release = fmi_exclusive_release,
+ .ioctl = video_ioctl2,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = v4l_compat_ioctl32,
+#endif
+ .llseek = no_llseek,
+};
+
+static const struct v4l2_ioctl_ops fmi_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 struct video_device fmi_radio = {
+ .name = "SF16FMx radio",
+ .fops = &fmi_fops,
+ .ioctl_ops = &fmi_ioctl_ops,
+ .release = video_device_release_empty,
+};
+
+/* ladis: this is my card. does any other types exist? */
+static struct isapnp_device_id id_table[] __devinitdata = {
+ { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+ ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
+ { ISAPNP_CARD_END, },
+};
+
+MODULE_DEVICE_TABLE(isapnp, id_table);
+
+static int __init isapnp_fmi_probe(void)
+{
+ int i = 0;
+
+ while (id_table[i].card_vendor != 0 && dev == NULL) {
+ dev = pnp_find_dev(NULL, id_table[i].vendor,
+ id_table[i].function, NULL);
+ i++;
+ }
+
+ if (!dev)
+ return -ENODEV;
+ if (pnp_device_attach(dev) < 0)
+ return -EAGAIN;
+ if (pnp_activate_dev(dev) < 0) {
+ printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n");
+ pnp_device_detach(dev);
+ return -ENOMEM;
+ }
+ if (!pnp_port_valid(dev, 0)) {
+ pnp_device_detach(dev);
+ return -ENODEV;
+ }
+
+ i = pnp_port_start(dev, 0);
+ printk ("radio-sf16fmi: PnP reports card at %#x\n", i);
+
+ return i;
+}
+
+static int __init fmi_init(void)
+{
+ if (io < 0)
+ io = isapnp_fmi_probe();
+ if (io < 0) {
+ printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n");
+ return io;
+ }
+ if (!request_region(io, 2, "radio-sf16fmi")) {
+ printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
+ pnp_device_detach(dev);
+ return -EBUSY;
+ }
+
+ fmi_unit.port = io;
+ fmi_unit.curvol = 0;
+ fmi_unit.curfreq = 0;
+ fmi_unit.flags = V4L2_TUNER_CAP_LOW;
+ video_set_drvdata(&fmi_radio, &fmi_unit);
+
+ mutex_init(&lock);
+
+ if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
+ release_region(io, 2);
+ return -EINVAL;
+ }
+
+ printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
+ /* mute card - prevents noisy bootups */
+ fmi_mute(io);
+ return 0;
+}
+
+MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
+MODULE_DESCRIPTION("A driver for the SF16MI radio.");
+MODULE_LICENSE("GPL");
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
+module_param(radio_nr, int, 0);
+
+static void __exit fmi_cleanup_module(void)
+{
+ video_unregister_device(&fmi_radio);
+ release_region(io, 2);
+ if (dev)
+ pnp_device_detach(dev);
+}
+
+module_init(fmi_init);
+module_exit(fmi_cleanup_module);
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