summaryrefslogtreecommitdiffstats
path: root/drivers/media/radio/radio-maxiradio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/radio/radio-maxiradio.c')
-rw-r--r--drivers/media/radio/radio-maxiradio.c482
1 files changed, 482 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-maxiradio.c b/drivers/media/radio/radio-maxiradio.c
new file mode 100644
index 0000000..c777a17
--- /dev/null
+++ b/drivers/media/radio/radio-maxiradio.c
@@ -0,0 +1,482 @@
+/*
+ * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
+ * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
+ *
+ * Based in the radio Maestro PCI driver. Actually it uses the same chip
+ * for radio but different pci controller.
+ *
+ * I didn't have any specs I reversed engineered the protocol from
+ * the windows driver (radio.dll).
+ *
+ * The card uses the TEA5757 chip that includes a search function but it
+ * is useless as I haven't found any way to read back the frequency. If
+ * anybody does please mail me.
+ *
+ * For the pdf file see:
+ * http://www.semiconductors.philips.com/pip/TEA5757H/V1
+ *
+ *
+ * CHANGES:
+ * 0.75b
+ * - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
+ *
+ * 0.75 Sun Feb 4 22:51:27 EET 2001
+ * - tiding up
+ * - removed support for multiple devices as it didn't work anyway
+ *
+ * BUGS:
+ * - card unmutes if you change frequency
+ *
+ * (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
+ * - Conversion to V4L2 API
+ * - Uses video_ioctl2 for parsing and to add debug support
+ */
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <linux/mutex.h>
+
+#include <linux/pci.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+
+#define DRIVER_VERSION "0.77"
+
+#include <linux/version.h> /* for KERNEL_VERSION MACRO */
+#define RADIO_VERSION KERNEL_VERSION(0,7,7)
+
+static struct video_device maxiradio_radio;
+
+#define dprintk(num, fmt, arg...) \
+ do { \
+ if (maxiradio_radio.debug >= num) \
+ printk(KERN_DEBUG "%s: " fmt, \
+ maxiradio_radio.name, ## arg); } while (0)
+
+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,
+ }
+};
+
+#ifndef PCI_VENDOR_ID_GUILLEMOT
+#define PCI_VENDOR_ID_GUILLEMOT 0x5046
+#endif
+
+#ifndef PCI_DEVICE_ID_GUILLEMOT
+#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
+#endif
+
+
+/* TEA5757 pin mappings */
+static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
+
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+
+static unsigned long in_use;
+
+#define FREQ_LO 50*16000
+#define FREQ_HI 150*16000
+
+#define FREQ_IF 171200 /* 10.7*16000 */
+#define FREQ_STEP 200 /* 12.5*16 */
+
+/* (x==fmhz*16*1000) -> bits */
+#define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1)) \
+ /(FREQ_STEP<<2))<<2)
+
+#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
+
+
+static int maxiradio_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int maxiradio_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &in_use);
+ return 0;
+}
+
+static const struct file_operations maxiradio_fops = {
+ .owner = THIS_MODULE,
+ .open = maxiradio_exclusive_open,
+ .release = maxiradio_exclusive_release,
+ .ioctl = video_ioctl2,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = v4l_compat_ioctl32,
+#endif
+ .llseek = no_llseek,
+};
+
+static struct radio_device
+{
+ __u16 io, /* base of radio io */
+ muted, /* VIDEO_AUDIO_MUTE */
+ stereo, /* VIDEO_TUNER_STEREO_ON */
+ tuned; /* signal strength (0 or 0xffff) */
+
+ unsigned long freq;
+
+ struct mutex lock;
+} radio_unit = {
+ .muted =1,
+ .freq = FREQ_LO,
+};
+
+static void outbit(unsigned long bit, __u16 io)
+{
+ if (bit != 0)
+ {
+ outb( power|wren|data ,io); udelay(4);
+ outb( power|wren|data|clk ,io); udelay(4);
+ outb( power|wren|data ,io); udelay(4);
+ }
+ else
+ {
+ outb( power|wren ,io); udelay(4);
+ outb( power|wren|clk ,io); udelay(4);
+ outb( power|wren ,io); udelay(4);
+ }
+}
+
+static void turn_power(__u16 io, int p)
+{
+ if (p != 0) {
+ dprintk(1, "Radio powered on\n");
+ outb(power, io);
+ } else {
+ dprintk(1, "Radio powered off\n");
+ outb(0,io);
+ }
+}
+
+static void set_freq(__u16 io, __u32 freq)
+{
+ unsigned long int si;
+ int bl;
+ int val = FREQ2BITS(freq);
+
+ /* TEA5757 shift register bits (see pdf) */
+
+ outbit(0, io); /* 24 search */
+ outbit(1, io); /* 23 search up/down */
+
+ outbit(0, io); /* 22 stereo/mono */
+
+ outbit(0, io); /* 21 band */
+ outbit(0, io); /* 20 band (only 00=FM works I think) */
+
+ outbit(0, io); /* 19 port ? */
+ outbit(0, io); /* 18 port ? */
+
+ outbit(0, io); /* 17 search level */
+ outbit(0, io); /* 16 search level */
+
+ si = 0x8000;
+ for (bl = 1; bl <= 16; bl++) {
+ outbit(val & si, io);
+ si >>= 1;
+ }
+
+ dprintk(1, "Radio freq set to %d.%02d MHz\n",
+ freq / 16000,
+ freq % 16000 * 100 / 16000);
+
+ turn_power(io, 1);
+}
+
+static int get_stereo(__u16 io)
+{
+ outb(power,io);
+ udelay(4);
+
+ return !(inb(io) & mo_st);
+}
+
+static int get_tune(__u16 io)
+{
+ outb(power+clk,io);
+ udelay(4);
+
+ return !(inb(io) & mo_st);
+}
+
+
+static int vidioc_querycap (struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ strlcpy(v->driver, "radio-maxiradio", sizeof (v->driver));
+ strlcpy(v->card, "Maxi Radio FM2000 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)
+{
+ struct radio_device *card = video_drvdata(file);
+
+ if (v->index > 0)
+ return -EINVAL;
+
+ memset(v,0,sizeof(*v));
+ strcpy(v->name, "FM");
+ v->type = V4L2_TUNER_RADIO;
+
+ v->rangelow=FREQ_LO;
+ v->rangehigh=FREQ_HI;
+ v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
+ v->capability=V4L2_TUNER_CAP_LOW;
+ if(get_stereo(card->io))
+ v->audmode = V4L2_TUNER_MODE_STEREO;
+ else
+ v->audmode = V4L2_TUNER_MODE_MONO;
+ v->signal=0xffff*get_tune(card->io);
+
+ 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_g_audio (struct file *file, void *priv,
+ struct v4l2_audio *a)
+{
+ if (a->index > 1)
+ return -EINVAL;
+
+ strcpy(a->name, "FM");
+ 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 int vidioc_s_frequency (struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct radio_device *card = video_drvdata(file);
+
+ if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
+ dprintk(1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
+ f->frequency / 16000,
+ f->frequency % 16000 * 100 / 16000,
+ FREQ_LO / 16000, FREQ_HI / 16000);
+
+ return -EINVAL;
+ }
+
+ card->freq = f->frequency;
+ set_freq(card->io, card->freq);
+ msleep(125);
+
+ return 0;
+}
+
+static int vidioc_g_frequency (struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct radio_device *card = video_drvdata(file);
+
+ f->type = V4L2_TUNER_RADIO;
+ f->frequency = card->freq;
+
+ dprintk(4, "radio freq is %d.%02d MHz",
+ f->frequency / 16000,
+ f->frequency % 16000 * 100 / 16000);
+
+ 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 radio_device *card = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value=card->muted;
+ return (0);
+ }
+
+ return -EINVAL;
+}
+
+static int vidioc_s_ctrl (struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct radio_device *card = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ card->muted = ctrl->value;
+ if(card->muted)
+ turn_power(card->io, 0);
+ else
+ set_freq(card->io, card->freq);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_ioctl_ops maxiradio_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 maxiradio_radio = {
+ .name = "Maxi Radio FM2000 radio",
+ .fops = &maxiradio_fops,
+ .ioctl_ops = &maxiradio_ioctl_ops,
+ .release = video_device_release_empty,
+};
+
+static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ if(!request_region(pci_resource_start(pdev, 0),
+ pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
+ printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n");
+ goto err_out;
+ }
+
+ if (pci_enable_device(pdev))
+ goto err_out_free_region;
+
+ radio_unit.io = pci_resource_start(pdev, 0);
+ mutex_init(&radio_unit.lock);
+ video_set_drvdata(&maxiradio_radio, &radio_unit);
+
+ if (video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
+ printk("radio-maxiradio: can't register device!");
+ goto err_out_free_region;
+ }
+
+ printk(KERN_INFO "radio-maxiradio: version "
+ DRIVER_VERSION
+ " time "
+ __TIME__ " "
+ __DATE__
+ "\n");
+
+ printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n",
+ radio_unit.io);
+ return 0;
+
+err_out_free_region:
+ release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+err_out:
+ return -ENODEV;
+}
+
+static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
+{
+ video_unregister_device(&maxiradio_radio);
+ release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+}
+
+static struct pci_device_id maxiradio_pci_tbl[] = {
+ { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
+ PCI_ANY_ID, PCI_ANY_ID, },
+ { 0,}
+};
+
+MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
+
+static struct pci_driver maxiradio_driver = {
+ .name = "radio-maxiradio",
+ .id_table = maxiradio_pci_tbl,
+ .probe = maxiradio_init_one,
+ .remove = __devexit_p(maxiradio_remove_one),
+};
+
+static int __init maxiradio_radio_init(void)
+{
+ return pci_register_driver(&maxiradio_driver);
+}
+
+static void __exit maxiradio_radio_exit(void)
+{
+ pci_unregister_driver(&maxiradio_driver);
+}
+
+module_init(maxiradio_radio_init);
+module_exit(maxiradio_radio_exit);
+
+MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
+MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
+MODULE_LICENSE("GPL");
+
+module_param_named(debug,maxiradio_radio.debug, int, 0644);
+MODULE_PARM_DESC(debug,"activates debug info");
OpenPOWER on IntegriCloud