diff options
Diffstat (limited to 'drivers/media/radio/radio-maxiradio.c')
-rw-r--r-- | drivers/media/radio/radio-maxiradio.c | 482 |
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"); |