Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 2 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood |
| 4 | * Converted to new API by Alan Cox <Alan.Cox@linux.org> |
| 5 | * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> |
| 6 | * |
| 7 | * TODO: Allow for more than one of these foolish entities :-) |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #include <linux/module.h> /* Modules */ |
| 12 | #include <linux/init.h> /* Initdata */ |
Peter Osterlund | fb911ee | 2005-09-13 01:25:15 -0700 | [diff] [blame] | 13 | #include <linux/ioport.h> /* request_region */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/delay.h> /* udelay */ |
| 15 | #include <asm/io.h> /* outb, outb_p */ |
| 16 | #include <asm/uaccess.h> /* copy to/from user */ |
| 17 | #include <linux/videodev.h> /* kernel radio structs */ |
Mauro Carvalho Chehab | 5e87efa | 2006-06-05 10:26:32 -0300 | [diff] [blame] | 18 | #include <media/v4l2-common.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/config.h> /* CONFIG_RADIO_RTRACK2_PORT */ |
| 20 | #include <linux/spinlock.h> |
| 21 | |
| 22 | #ifndef CONFIG_RADIO_RTRACK2_PORT |
| 23 | #define CONFIG_RADIO_RTRACK2_PORT -1 |
| 24 | #endif |
| 25 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 26 | static int io = CONFIG_RADIO_RTRACK2_PORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | static int radio_nr = -1; |
| 28 | static spinlock_t lock; |
| 29 | |
| 30 | struct rt_device |
| 31 | { |
| 32 | int port; |
| 33 | unsigned long curfreq; |
| 34 | int muted; |
| 35 | }; |
| 36 | |
| 37 | |
| 38 | /* local things */ |
| 39 | |
| 40 | static void rt_mute(struct rt_device *dev) |
| 41 | { |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 42 | if(dev->muted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | return; |
| 44 | spin_lock(&lock); |
| 45 | outb(1, io); |
| 46 | spin_unlock(&lock); |
| 47 | dev->muted = 1; |
| 48 | } |
| 49 | |
| 50 | static void rt_unmute(struct rt_device *dev) |
| 51 | { |
| 52 | if(dev->muted == 0) |
| 53 | return; |
| 54 | spin_lock(&lock); |
| 55 | outb(0, io); |
| 56 | spin_unlock(&lock); |
| 57 | dev->muted = 0; |
| 58 | } |
| 59 | |
| 60 | static void zero(void) |
| 61 | { |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 62 | outb_p(1, io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | outb_p(3, io); |
| 64 | outb_p(1, io); |
| 65 | } |
| 66 | |
| 67 | static void one(void) |
| 68 | { |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 69 | outb_p(5, io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | outb_p(7, io); |
| 71 | outb_p(5, io); |
| 72 | } |
| 73 | |
| 74 | static int rt_setfreq(struct rt_device *dev, unsigned long freq) |
| 75 | { |
| 76 | int i; |
| 77 | |
| 78 | freq = freq / 200 + 856; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | spin_lock(&lock); |
| 81 | |
| 82 | outb_p(0xc8, io); |
| 83 | outb_p(0xc9, io); |
| 84 | outb_p(0xc9, io); |
| 85 | |
| 86 | for (i = 0; i < 10; i++) |
| 87 | zero (); |
| 88 | |
| 89 | for (i = 14; i >= 0; i--) |
| 90 | if (freq & (1 << i)) |
| 91 | one (); |
| 92 | else |
| 93 | zero (); |
| 94 | |
| 95 | outb_p(0xc8, io); |
| 96 | if (!dev->muted) |
| 97 | outb_p(0, io); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | spin_unlock(&lock); |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static int rt_getsigstr(struct rt_device *dev) |
| 104 | { |
| 105 | if (inb(io) & 2) /* bit set = no signal present */ |
| 106 | return 0; |
| 107 | return 1; /* signal present */ |
| 108 | } |
| 109 | |
| 110 | static int rt_do_ioctl(struct inode *inode, struct file *file, |
| 111 | unsigned int cmd, void *arg) |
| 112 | { |
| 113 | struct video_device *dev = video_devdata(file); |
| 114 | struct rt_device *rt=dev->priv; |
| 115 | |
| 116 | switch(cmd) |
| 117 | { |
| 118 | case VIDIOCGCAP: |
| 119 | { |
| 120 | struct video_capability *v = arg; |
| 121 | memset(v,0,sizeof(*v)); |
| 122 | v->type=VID_TYPE_TUNER; |
| 123 | v->channels=1; |
| 124 | v->audios=1; |
| 125 | strcpy(v->name, "RadioTrack II"); |
| 126 | return 0; |
| 127 | } |
| 128 | case VIDIOCGTUNER: |
| 129 | { |
| 130 | struct video_tuner *v = arg; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 131 | if(v->tuner) /* Only 1 tuner */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | return -EINVAL; |
| 133 | v->rangelow=88*16000; |
| 134 | v->rangehigh=108*16000; |
| 135 | v->flags=VIDEO_TUNER_LOW; |
| 136 | v->mode=VIDEO_MODE_AUTO; |
| 137 | v->signal=0xFFFF*rt_getsigstr(rt); |
| 138 | strcpy(v->name, "FM"); |
| 139 | return 0; |
| 140 | } |
| 141 | case VIDIOCSTUNER: |
| 142 | { |
| 143 | struct video_tuner *v = arg; |
| 144 | if(v->tuner!=0) |
| 145 | return -EINVAL; |
| 146 | /* Only 1 tuner so no setting needed ! */ |
| 147 | return 0; |
| 148 | } |
| 149 | case VIDIOCGFREQ: |
| 150 | { |
| 151 | unsigned long *freq = arg; |
| 152 | *freq = rt->curfreq; |
| 153 | return 0; |
| 154 | } |
| 155 | case VIDIOCSFREQ: |
| 156 | { |
| 157 | unsigned long *freq = arg; |
| 158 | rt->curfreq = *freq; |
| 159 | rt_setfreq(rt, rt->curfreq); |
| 160 | return 0; |
| 161 | } |
| 162 | case VIDIOCGAUDIO: |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 163 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | struct video_audio *v = arg; |
| 165 | memset(v,0, sizeof(*v)); |
| 166 | v->flags|=VIDEO_AUDIO_MUTABLE; |
| 167 | v->volume=1; |
| 168 | v->step=65535; |
| 169 | strcpy(v->name, "Radio"); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 170 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | } |
| 172 | case VIDIOCSAUDIO: |
| 173 | { |
| 174 | struct video_audio *v = arg; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 175 | if(v->audio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return -EINVAL; |
| 177 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 178 | if(v->flags&VIDEO_AUDIO_MUTE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | rt_mute(rt); |
| 180 | else |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 181 | rt_unmute(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | default: |
| 186 | return -ENOIOCTLCMD; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | static int rt_ioctl(struct inode *inode, struct file *file, |
| 191 | unsigned int cmd, unsigned long arg) |
| 192 | { |
| 193 | return video_usercopy(inode, file, cmd, arg, rt_do_ioctl); |
| 194 | } |
| 195 | |
| 196 | static struct rt_device rtrack2_unit; |
| 197 | |
| 198 | static struct file_operations rtrack2_fops = { |
| 199 | .owner = THIS_MODULE, |
| 200 | .open = video_exclusive_open, |
| 201 | .release = video_exclusive_release, |
| 202 | .ioctl = rt_ioctl, |
Arnd Bergmann | 0d0fbf8 | 2006-01-09 15:24:57 -0200 | [diff] [blame] | 203 | .compat_ioctl = v4l_compat_ioctl32, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | .llseek = no_llseek, |
| 205 | }; |
| 206 | |
| 207 | static struct video_device rtrack2_radio= |
| 208 | { |
| 209 | .owner = THIS_MODULE, |
| 210 | .name = "RadioTrack II radio", |
| 211 | .type = VID_TYPE_TUNER, |
| 212 | .hardware = VID_HARDWARE_RTRACK2, |
| 213 | .fops = &rtrack2_fops, |
| 214 | }; |
| 215 | |
| 216 | static int __init rtrack2_init(void) |
| 217 | { |
| 218 | if(io==-1) |
| 219 | { |
| 220 | printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n"); |
| 221 | return -EINVAL; |
| 222 | } |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 223 | if (!request_region(io, 4, "rtrack2")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
| 225 | printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io); |
| 226 | return -EBUSY; |
| 227 | } |
| 228 | |
| 229 | rtrack2_radio.priv=&rtrack2_unit; |
| 230 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 231 | spin_lock_init(&lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1) |
| 233 | { |
| 234 | release_region(io, 4); |
| 235 | return -EINVAL; |
| 236 | } |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n"); |
| 239 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 240 | /* mute card - prevents noisy bootups */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | outb(1, io); |
| 242 | rtrack2_unit.muted = 1; |
| 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | MODULE_AUTHOR("Ben Pfaff"); |
| 248 | MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); |
| 249 | MODULE_LICENSE("GPL"); |
| 250 | |
| 251 | module_param(io, int, 0); |
| 252 | MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); |
| 253 | module_param(radio_nr, int, 0); |
| 254 | |
| 255 | static void __exit rtrack2_cleanup_module(void) |
| 256 | { |
| 257 | video_unregister_device(&rtrack2_radio); |
| 258 | release_region(io,4); |
| 259 | } |
| 260 | |
| 261 | module_init(rtrack2_init); |
| 262 | module_exit(rtrack2_cleanup_module); |
| 263 | |
| 264 | /* |
| 265 | Local variables: |
| 266 | compile-command: "mmake" |
| 267 | End: |
| 268 | */ |