From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/media/radio/radio-maestro.c | 332 ++++++++++++++++++++++++++++++++++++ 1 file changed, 332 insertions(+) create mode 100644 drivers/media/radio/radio-maestro.c (limited to 'drivers/media/radio/radio-maestro.c') diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c new file mode 100644 index 000000000000..e62147e4ed1b --- /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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 (*freqFREQ_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((ofreqFREQ2BITS(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; +} + -- cgit v1.2.3-59-g8ed1b