/* 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 #include #include #include #include #include #include #include "compat.h" #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,15) #include #endif #include #include #define DRIVER_VERSION "0.05" #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 /(FREQ_STEP #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 int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent); static void maestro_remove(struct pci_dev *pdev); static struct pci_device_id maestro_r_pci_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968), .class = PCI_CLASS_MULTIMEDIA_AUDIO .class_mask = 0xffff00 }, { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978), .class = PCI_CLASS_MULTIMEDIA_AUDIO .class_mask = 0xffff00 }, { 0 } }; MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl); static struct pci_driver maestro_r_driver = { .name = "maestro_radio", .id_table = maestro_r_pci_tbl, .probe = maestro_probe, .remove = __devexit_p(maestro_remove), }; static struct file_operations maestro_fops = { .owner = THIS_MODULE, .open = video_exclusive_open, .release = video_exclusive_release, .ioctl = radio_ioctl, .compat_ioctl = v4l_compat_ioctl32, .llseek = no_llseek, }; static struct video_device maestro_radio = { .name = "Maestro radio", .type = VID_TYPE_TUNER, .hardware = VID_HARDWARE_SF16MI, .fops = &maestro_fops, }; 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 mutex lock; }; 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 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 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); } static inline 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 = video_get_drvdata(dev); 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 = video_get_drvdata(dev); int ret; mutex_lock(&card->lock); ret = video_usercopy(inode, file, cmd, arg, radio_function); mutex_unlock(&card->lock); return ret; } static u16 __devinit 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 int __devinit maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct radio_device *radio_unit; struct video_device *maestro_radio_inst; int retval; retval = pci_enable_device(pdev); if (retval) { dev_err(&pdev->dev, "enabling pci device failed!\n"); goto err; } retval = -ENOMEM; radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL); if (radio_unit == NULL) { dev_err(&pdev->dev, "not enough memory\n"); goto err; } radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA; mutex_init(&radio_unit->lock); maestro_radio_inst = video_device_alloc(); if (maestro_radio_inst == NULL) { dev_err(&pdev->dev, "not enough memory\n"); goto errfr; } memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio)); video_set_drvdata(maestro_radio_inst, radio_unit); pci_set_drvdata(pdev, maestro_radio_inst); retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, radio_nr); if (retval) { printk(KERN_ERR "can't register video device!\n"); goto errfr1; } if (!radio_power_on(radio_unit)) { retval = -EIO; goto errunr; } dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " " __DATE__ "\n"); dev_info(&pdev->dev, "radio chip initialized\n"); return 0; errunr: video_unregister_device(maestro_radio_inst); errfr1: kfree(maestro_radio_inst); errfr: kfree(radio_unit); err: return retval; } static void __devexit maestro_remove(struct pci_dev *pdev) { struct video_device *vdev = pci_get_drvdata(pdev); video_unregister_device(vdev); } static int __init maestro_radio_init(void) { int retval = pci_register_driver(&maestro_r_driver); if (retval) printk(KERN_ERR "error during registration pci driver\n"); return retval; } static void __exit maestro_radio_exit(void) { pci_unregister_driver(&maestro_r_driver); } module_init(maestro_radio_init); module_exit(maestro_radio_exit); MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl"); MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio."); MODULE_LICENSE("GPL");
