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path: root/drivers/media/radio/radio-maestro.c
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Diffstat (limited to 'drivers/media/radio/radio-maestro.c')
-rw-r--r--drivers/media/radio/radio-maestro.c332
1 files changed, 332 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c
new file mode 100644
index 00000000000..e62147e4ed1
--- /dev/null
+++ b/drivers/media/radio/radio-maestro.c
@@ -0,0 +1,332 @@
+/* Maestro PCI sound card radio driver for Linux support
+ * (c) 2000 A. Tlalka, atlka@pg.gda.pl
+ * Notes on the hardware
+ *
+ * + Frequency control is done digitally
+ * + No volume control - only mute/unmute - you have to use Aux line volume
+ * control on Maestro card to set the volume
+ * + Radio status (tuned/not_tuned and stereo/mono) is valid some time after
+ * frequency setting (>100ms) and only when the radio is unmuted.
+ * version 0.02
+ * + io port is automatically detected - only the first radio is used
+ * version 0.03
+ * + thread access locking additions
+ * version 0.04
+ * + code improvements
+ * + VIDEO_TUNER_LOW is permanent
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <linux/pci.h>
+#include <linux/videodev.h>
+
+#define DRIVER_VERSION "0.04"
+
+#define PCI_VENDOR_ESS 0x125D
+#define PCI_DEVICE_ID_ESS_ESS1968 0x1968 /* Maestro 2 */
+#define PCI_DEVICE_ID_ESS_ESS1978 0x1978 /* Maestro 2E */
+
+#define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
+
+#define IO_MASK 4 /* mask register offset from GPIO_DATA
+ bits 1=unmask write to given bit */
+#define IO_DIR 8 /* direction register offset from GPIO_DATA
+ bits 0/1=read/write direction */
+
+#define GPIO6 0x0040 /* mask bits for GPIO lines */
+#define GPIO7 0x0080
+#define GPIO8 0x0100
+#define GPIO9 0x0200
+
+#define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
+#define STR_CLK GPIO7
+#define STR_WREN GPIO8
+#define STR_MOST GPIO9
+
+#define FREQ_LO 50*16000
+#define FREQ_HI 150*16000
+
+#define FREQ_IF 171200 /* 10.7*16000 */
+#define FREQ_STEP 200 /* 12.5*16 */
+
+#define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
+ /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
+
+#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
+
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+
+static int radio_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg);
+
+static struct file_operations maestro_fops = {
+ .owner = THIS_MODULE,
+ .open = video_exclusive_open,
+ .release = video_exclusive_release,
+ .ioctl = radio_ioctl,
+ .llseek = no_llseek,
+};
+
+static struct video_device maestro_radio=
+{
+ .owner = THIS_MODULE,
+ .name = "Maestro radio",
+ .type = VID_TYPE_TUNER,
+ .hardware = VID_HARDWARE_SF16MI,
+ .fops = &maestro_fops,
+};
+
+static struct radio_device
+{
+ __u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
+ muted, /* VIDEO_AUDIO_MUTE */
+ stereo, /* VIDEO_TUNER_STEREO_ON */
+ tuned; /* signal strength (0 or 0xffff) */
+ struct semaphore lock;
+} radio_unit = {0, 0, 0, 0, };
+
+static __u32 radio_bits_get(struct radio_device *dev)
+{
+ register __u16 io=dev->io, l, rdata;
+ register __u32 data=0;
+ __u16 omask;
+ omask = inw(io + IO_MASK);
+ outw(~(STR_CLK | STR_WREN), io + IO_MASK);
+ outw(0, io);
+ udelay(16);
+
+ for (l=24;l--;) {
+ outw(STR_CLK, io); /* HI state */
+ udelay(2);
+ if(!l)
+ dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
+ outw(0, io); /* LO state */
+ udelay(2);
+ data <<= 1; /* shift data */
+ rdata = inw(io);
+ if(!l)
+ dev->stereo = rdata & STR_MOST ?
+ 0 : VIDEO_TUNER_STEREO_ON;
+ else
+ if(rdata & STR_DATA)
+ data++;
+ udelay(2);
+ }
+ if(dev->muted)
+ outw(STR_WREN, io);
+ udelay(4);
+ outw(omask, io + IO_MASK);
+ return data & 0x3ffe;
+}
+
+static void radio_bits_set(struct radio_device *dev, __u32 data)
+{
+ register __u16 io=dev->io, l, bits;
+ __u16 omask, odir;
+ omask = inw(io + IO_MASK);
+ odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
+ outw(odir | STR_DATA, io + IO_DIR);
+ outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
+ udelay(16);
+ for (l=25;l;l--) {
+ bits = ((data >> 18) & STR_DATA) | STR_WREN ;
+ data <<= 1; /* shift data */
+ outw(bits, io); /* start strobe */
+ udelay(2);
+ outw(bits | STR_CLK, io); /* HI level */
+ udelay(2);
+ outw(bits, io); /* LO level */
+ udelay(4);
+ }
+ if(!dev->muted)
+ outw(0, io);
+ udelay(4);
+ outw(omask, io + IO_MASK);
+ outw(odir, io + IO_DIR);
+ msleep(125);
+}
+
+inline static int radio_function(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ struct video_device *dev = video_devdata(file);
+ struct radio_device *card=dev->priv;
+
+ switch(cmd) {
+ case VIDIOCGCAP: {
+ struct video_capability *v = arg;
+ memset(v,0,sizeof(*v));
+ strcpy(v->name, "Maestro radio");
+ v->type=VID_TYPE_TUNER;
+ v->channels=v->audios=1;
+ return 0;
+ }
+ case VIDIOCGTUNER: {
+ struct video_tuner *v = arg;
+ if(v->tuner)
+ return -EINVAL;
+ (void)radio_bits_get(card);
+ v->flags = VIDEO_TUNER_LOW | card->stereo;
+ v->signal = card->tuned;
+ strcpy(v->name, "FM");
+ v->rangelow = FREQ_LO;
+ v->rangehigh = FREQ_HI;
+ v->mode = VIDEO_MODE_AUTO;
+ return 0;
+ }
+ case VIDIOCSTUNER: {
+ struct video_tuner *v = arg;
+ if(v->tuner!=0)
+ return -EINVAL;
+ return 0;
+ }
+ case VIDIOCGFREQ: {
+ unsigned long *freq = arg;
+ *freq = BITS2FREQ(radio_bits_get(card));
+ return 0;
+ }
+ case VIDIOCSFREQ: {
+ unsigned long *freq = arg;
+ if (*freq<FREQ_LO || *freq>FREQ_HI )
+ return -EINVAL;
+ radio_bits_set(card, FREQ2BITS(*freq));
+ return 0;
+ }
+ case VIDIOCGAUDIO: {
+ struct video_audio *v = arg;
+ memset(v,0,sizeof(*v));
+ strcpy(v->name, "Radio");
+ v->flags=VIDEO_AUDIO_MUTABLE | card->muted;
+ v->mode=VIDEO_SOUND_STEREO;
+ return 0;
+ }
+ case VIDIOCSAUDIO: {
+ struct video_audio *v = arg;
+ if(v->audio)
+ return -EINVAL;
+ {
+ register __u16 io=card->io;
+ register __u16 omask = inw(io + IO_MASK);
+ outw(~STR_WREN, io + IO_MASK);
+ outw((card->muted = v->flags & VIDEO_AUDIO_MUTE)
+ ? STR_WREN : 0, io);
+ udelay(4);
+ outw(omask, io + IO_MASK);
+ msleep(125);
+ return 0;
+ }
+ }
+ case VIDIOCGUNIT: {
+ struct video_unit *v = arg;
+ v->video=VIDEO_NO_UNIT;
+ v->vbi=VIDEO_NO_UNIT;
+ v->radio=dev->minor;
+ v->audio=0;
+ v->teletext=VIDEO_NO_UNIT;
+ return 0;
+ }
+ default: return -ENOIOCTLCMD;
+ }
+}
+
+static int radio_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct video_device *dev = video_devdata(file);
+ struct radio_device *card=dev->priv;
+ int ret;
+
+ down(&card->lock);
+ ret = video_usercopy(inode, file, cmd, arg, radio_function);
+ up(&card->lock);
+ return ret;
+}
+
+static __u16 radio_install(struct pci_dev *pcidev);
+
+MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
+MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
+MODULE_LICENSE("GPL");
+
+static void __exit maestro_radio_exit(void)
+{
+ video_unregister_device(&maestro_radio);
+}
+
+static int __init maestro_radio_init(void)
+{
+ register __u16 found=0;
+ struct pci_dev *pcidev = NULL;
+ while(!found && (pcidev = pci_find_device(PCI_VENDOR_ESS,
+ PCI_DEVICE_ID_ESS_ESS1968,
+ pcidev)))
+ found |= radio_install(pcidev);
+ while(!found && (pcidev = pci_find_device(PCI_VENDOR_ESS,
+ PCI_DEVICE_ID_ESS_ESS1978,
+ pcidev)))
+ found |= radio_install(pcidev);
+ if(!found) {
+ printk(KERN_INFO "radio-maestro: no devices found.\n");
+ return -ENODEV;
+ }
+ return 0;
+}
+
+module_init(maestro_radio_init);
+module_exit(maestro_radio_exit);
+
+inline static __u16 radio_power_on(struct radio_device *dev)
+{
+ register __u16 io=dev->io;
+ register __u32 ofreq;
+ __u16 omask, odir;
+ omask = inw(io + IO_MASK);
+ odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
+ outw(odir & ~STR_WREN, io + IO_DIR);
+ dev->muted = inw(io) & STR_WREN ? 0 : VIDEO_AUDIO_MUTE;
+ outw(odir, io + IO_DIR);
+ outw(~(STR_WREN | STR_CLK), io + IO_MASK);
+ outw(dev->muted ? 0 : STR_WREN, io);
+ udelay(16);
+ outw(omask, io + IO_MASK);
+ ofreq = radio_bits_get(dev);
+ if((ofreq<FREQ2BITS(FREQ_LO)) || (ofreq>FREQ2BITS(FREQ_HI)))
+ ofreq = FREQ2BITS(FREQ_LO);
+ radio_bits_set(dev, ofreq);
+ return (ofreq == radio_bits_get(dev));
+}
+
+static __u16 radio_install(struct pci_dev *pcidev)
+{
+ if(((pcidev->class >> 8) & 0xffff) != PCI_CLASS_MULTIMEDIA_AUDIO)
+ return 0;
+
+ radio_unit.io = pcidev->resource[0].start + GPIO_DATA;
+ maestro_radio.priv = &radio_unit;
+ init_MUTEX(&radio_unit.lock);
+
+ if(radio_power_on(&radio_unit)) {
+ if(video_register_device(&maestro_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
+ printk("radio-maestro: can't register device!");
+ return 0;
+ }
+ printk(KERN_INFO "radio-maestro: version "
+ DRIVER_VERSION
+ " time "
+ __TIME__ " "
+ __DATE__
+ "\n");
+ printk(KERN_INFO "radio-maestro: radio chip initialized\n");
+ return 1;
+ } else
+ return 0;
+}
+
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