Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Modified in order to keep it compatible both with new and old videotext IOCTLs by |
| 3 | * Michael Geng <linux@MichaelGeng.de> |
| 4 | * |
| 5 | * Cleaned up to use existing videodev interface and allow the idea |
| 6 | * of multiple teletext decoders on the video4linux iface. Changed i2c |
| 7 | * to cover addressing clashes on device busses. It's also rebuilt so |
| 8 | * you can add arbitary multiple teletext devices to Linux video4linux |
| 9 | * now (well 32 anyway). |
| 10 | * |
| 11 | * Alan Cox <Alan.Cox@linux.org> |
| 12 | * |
| 13 | * The original driver was heavily modified to match the i2c interface |
| 14 | * It was truncated to use the WinTV boards, too. |
| 15 | * |
| 16 | * Copyright (c) 1998 Richard Guenther <richard.guenther@student.uni-tuebingen.de> |
| 17 | * |
| 18 | * $Id: saa5249.c,v 1.1 1998/03/30 22:23:23 alan Exp $ |
| 19 | * |
| 20 | * Derived From |
| 21 | * |
| 22 | * vtx.c: |
| 23 | * This is a loadable character-device-driver for videotext-interfaces |
| 24 | * (aka teletext). Please check the Makefile/README for a list of supported |
| 25 | * interfaces. |
| 26 | * |
| 27 | * Copyright (c) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de> |
| 28 | * |
| 29 | * |
| 30 | * This program is free software; you can redistribute it and/or modify |
| 31 | * it under the terms of the GNU General Public License as published by |
| 32 | * the Free Software Foundation; either version 2 of the License, or |
| 33 | * (at your option) any later version. |
| 34 | * |
| 35 | * This program is distributed in the hope that it will be useful, |
| 36 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 37 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 38 | * GNU General Public License for more details. |
| 39 | * |
| 40 | * You should have received a copy of the GNU General Public License |
| 41 | * along with this program; if not, write to the Free Software |
| 42 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 43 | * USA. |
| 44 | */ |
| 45 | |
| 46 | #include <linux/module.h> |
| 47 | #include <linux/kernel.h> |
| 48 | #include <linux/sched.h> |
| 49 | #include <linux/mm.h> |
| 50 | #include <linux/errno.h> |
| 51 | #include <linux/delay.h> |
| 52 | #include <linux/ioport.h> |
| 53 | #include <linux/slab.h> |
| 54 | #include <linux/init.h> |
| 55 | #include <stdarg.h> |
| 56 | #include <linux/i2c.h> |
| 57 | #include <linux/videotext.h> |
| 58 | #include <linux/videodev.h> |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 59 | #include <linux/mutex.h> |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | #include <asm/io.h> |
| 63 | #include <asm/uaccess.h> |
| 64 | |
| 65 | #define VTX_VER_MAJ 1 |
| 66 | #define VTX_VER_MIN 8 |
| 67 | |
| 68 | |
| 69 | |
| 70 | #define NUM_DAUS 4 |
| 71 | #define NUM_BUFS 8 |
| 72 | #define IF_NAME "SAA5249" |
| 73 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 74 | static const int disp_modes[8][3] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
| 76 | { 0x46, 0x03, 0x03 }, /* DISPOFF */ |
| 77 | { 0x46, 0xcc, 0xcc }, /* DISPNORM */ |
| 78 | { 0x44, 0x0f, 0x0f }, /* DISPTRANS */ |
| 79 | { 0x46, 0xcc, 0x46 }, /* DISPINS */ |
| 80 | { 0x44, 0x03, 0x03 }, /* DISPOFF, interlaced */ |
| 81 | { 0x44, 0xcc, 0xcc }, /* DISPNORM, interlaced */ |
| 82 | { 0x44, 0x0f, 0x0f }, /* DISPTRANS, interlaced */ |
| 83 | { 0x44, 0xcc, 0x46 } /* DISPINS, interlaced */ |
| 84 | }; |
| 85 | |
| 86 | |
| 87 | |
| 88 | #define PAGE_WAIT (300*HZ/1000) /* Time between requesting page and */ |
| 89 | /* checking status bits */ |
| 90 | #define PGBUF_EXPIRE (15*HZ) /* Time to wait before retransmitting */ |
| 91 | /* page regardless of infobits */ |
| 92 | typedef struct { |
| 93 | u8 pgbuf[VTX_VIRTUALSIZE]; /* Page-buffer */ |
| 94 | u8 laststat[10]; /* Last value of infobits for DAU */ |
| 95 | u8 sregs[7]; /* Page-request registers */ |
| 96 | unsigned long expire; /* Time when page will be expired */ |
| 97 | unsigned clrfound : 1; /* VTXIOCCLRFOUND has been called */ |
| 98 | unsigned stopped : 1; /* VTXIOCSTOPDAU has been called */ |
| 99 | } vdau_t; |
| 100 | |
| 101 | struct saa5249_device |
| 102 | { |
| 103 | vdau_t vdau[NUM_DAUS]; /* Data for virtual DAUs (the 5249 only has one */ |
| 104 | /* real DAU, so we have to simulate some more) */ |
| 105 | int vtx_use_count; |
| 106 | int is_searching[NUM_DAUS]; |
| 107 | int disp_mode; |
| 108 | int virtual_mode; |
| 109 | struct i2c_client *client; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 110 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | |
| 114 | #define CCTWR 34 /* I²C write/read-address of vtx-chip */ |
| 115 | #define CCTRD 35 |
| 116 | #define NOACK_REPEAT 10 /* Retry access this many times on failure */ |
| 117 | #define CLEAR_DELAY (HZ/20) /* Time required to clear a page */ |
| 118 | #define READY_TIMEOUT (30*HZ/1000) /* Time to wait for ready signal of I²C-bus interface */ |
| 119 | #define INIT_DELAY 500 /* Time in usec to wait at initialization of CEA interface */ |
| 120 | #define START_DELAY 10 /* Time in usec to wait before starting write-cycle (CEA) */ |
| 121 | |
| 122 | #define VTX_DEV_MINOR 0 |
| 123 | |
| 124 | /* General defines and debugging support */ |
| 125 | |
| 126 | #ifndef FALSE |
| 127 | #define FALSE 0 |
| 128 | #define TRUE 1 |
| 129 | #endif |
| 130 | |
| 131 | #define RESCHED do { cond_resched(); } while(0) |
| 132 | |
| 133 | static struct video_device saa_template; /* Declared near bottom */ |
| 134 | |
| 135 | /* Addresses to scan */ |
| 136 | static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | I2C_CLIENT_INSMOD; |
| 138 | |
| 139 | static struct i2c_client client_template; |
| 140 | |
| 141 | static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind) |
| 142 | { |
| 143 | int pgbuf; |
| 144 | int err; |
| 145 | struct i2c_client *client; |
| 146 | struct video_device *vd; |
| 147 | struct saa5249_device *t; |
| 148 | |
| 149 | printk(KERN_INFO "saa5249: teletext chip found.\n"); |
| 150 | client=kmalloc(sizeof(*client), GFP_KERNEL); |
| 151 | if(client==NULL) |
| 152 | return -ENOMEM; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 153 | client_template.adapter = adap; |
| 154 | client_template.addr = addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | memcpy(client, &client_template, sizeof(*client)); |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 156 | t = kzalloc(sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | if(t==NULL) |
| 158 | { |
| 159 | kfree(client); |
| 160 | return -ENOMEM; |
| 161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | strlcpy(client->name, IF_NAME, I2C_NAME_SIZE); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 163 | mutex_init(&t->lock); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | /* |
| 166 | * Now create a video4linux device |
| 167 | */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 168 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 169 | vd = kmalloc(sizeof(struct video_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | if(vd==NULL) |
| 171 | { |
| 172 | kfree(t); |
| 173 | kfree(client); |
| 174 | return -ENOMEM; |
| 175 | } |
| 176 | i2c_set_clientdata(client, vd); |
| 177 | memcpy(vd, &saa_template, sizeof(*vd)); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 178 | |
| 179 | for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | { |
| 181 | memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf)); |
| 182 | memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs)); |
| 183 | memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat)); |
| 184 | t->vdau[pgbuf].expire = 0; |
| 185 | t->vdau[pgbuf].clrfound = TRUE; |
| 186 | t->vdau[pgbuf].stopped = TRUE; |
| 187 | t->is_searching[pgbuf] = FALSE; |
| 188 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 189 | vd->priv=t; |
| 190 | |
| 191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | /* |
| 193 | * Register it |
| 194 | */ |
| 195 | |
| 196 | if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0) |
| 197 | { |
| 198 | kfree(t); |
| 199 | kfree(vd); |
| 200 | kfree(client); |
| 201 | return err; |
| 202 | } |
| 203 | t->client = client; |
| 204 | i2c_attach_client(client); |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * We do most of the hard work when we become a device on the i2c. |
| 210 | */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | static int saa5249_probe(struct i2c_adapter *adap) |
| 213 | { |
| 214 | if (adap->class & I2C_CLASS_TV_ANALOG) |
| 215 | return i2c_probe(adap, &addr_data, saa5249_attach); |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | static int saa5249_detach(struct i2c_client *client) |
| 220 | { |
| 221 | struct video_device *vd = i2c_get_clientdata(client); |
| 222 | i2c_detach_client(client); |
| 223 | video_unregister_device(vd); |
| 224 | kfree(vd->priv); |
| 225 | kfree(vd); |
| 226 | kfree(client); |
| 227 | return 0; |
| 228 | } |
| 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | /* new I2C driver support */ |
| 231 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 232 | static struct i2c_driver i2c_driver_videotext = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
Laurent Riffard | 604f28e | 2005-11-26 20:43:39 +0100 | [diff] [blame] | 234 | .driver = { |
Laurent Riffard | 604f28e | 2005-11-26 20:43:39 +0100 | [diff] [blame] | 235 | .name = IF_NAME, /* name */ |
| 236 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | .id = I2C_DRIVERID_SAA5249, /* in i2c.h */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | .attach_adapter = saa5249_probe, |
| 239 | .detach_client = saa5249_detach, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | }; |
| 241 | |
| 242 | static struct i2c_client client_template = { |
| 243 | .driver = &i2c_driver_videotext, |
| 244 | .name = "(unset)", |
| 245 | }; |
| 246 | |
| 247 | /* |
| 248 | * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual |
| 249 | * delay may be longer. |
| 250 | */ |
| 251 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 252 | static void jdelay(unsigned long delay) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
| 254 | sigset_t oldblocked = current->blocked; |
| 255 | |
| 256 | spin_lock_irq(¤t->sighand->siglock); |
| 257 | sigfillset(¤t->blocked); |
| 258 | recalc_sigpending(); |
| 259 | spin_unlock_irq(¤t->sighand->siglock); |
| 260 | msleep_interruptible(jiffies_to_msecs(delay)); |
| 261 | |
| 262 | spin_lock_irq(¤t->sighand->siglock); |
| 263 | current->blocked = oldblocked; |
| 264 | recalc_sigpending(); |
| 265 | spin_unlock_irq(¤t->sighand->siglock); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* |
| 270 | * I2C interfaces |
| 271 | */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 272 | |
| 273 | static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | { |
| 275 | char buf[64]; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | buf[0] = reg; |
| 278 | memcpy(buf+1, data, count); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if(i2c_master_send(t->client, buf, count+1)==count+1) |
| 281 | return 0; |
| 282 | return -1; |
| 283 | } |
| 284 | |
| 285 | static int i2c_senddata(struct saa5249_device *t, ...) |
| 286 | { |
| 287 | unsigned char buf[64]; |
| 288 | int v; |
| 289 | int ct=0; |
| 290 | va_list argp; |
| 291 | va_start(argp,t); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | while((v=va_arg(argp,int))!=-1) |
| 294 | buf[ct++]=v; |
| 295 | return i2c_sendbuf(t, buf[0], ct-1, buf+1); |
| 296 | } |
| 297 | |
| 298 | /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop |
| 299 | * handshaking is done by this routine, ack will be sent after the last byte to inhibit further |
| 300 | * sending of data. If uaccess is TRUE, data is written to user-space with put_user. |
| 301 | * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise |
| 302 | */ |
| 303 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 304 | static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | { |
| 306 | if(i2c_master_recv(t->client, buf, count)!=count) |
| 307 | return -1; |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | |
| 312 | /* |
| 313 | * Standard character-device-driver functions |
| 314 | */ |
| 315 | |
| 316 | static int do_saa5249_ioctl(struct inode *inode, struct file *file, |
| 317 | unsigned int cmd, void *arg) |
| 318 | { |
| 319 | static int virtual_mode = FALSE; |
| 320 | struct video_device *vd = video_devdata(file); |
| 321 | struct saa5249_device *t=vd->priv; |
| 322 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 323 | switch(cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 325 | case VTXIOCGETINFO: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { |
| 327 | vtx_info_t *info = arg; |
| 328 | info->version_major = VTX_VER_MAJ; |
| 329 | info->version_minor = VTX_VER_MIN; |
| 330 | info->numpages = NUM_DAUS; |
| 331 | /*info->cct_type = CCT_TYPE;*/ |
| 332 | return 0; |
| 333 | } |
| 334 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 335 | case VTXIOCCLRPAGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
| 337 | vtx_pagereq_t *req = arg; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 340 | return -EINVAL; |
| 341 | memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf)); |
| 342 | t->vdau[req->pgbuf].clrfound = TRUE; |
| 343 | return 0; |
| 344 | } |
| 345 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 346 | case VTXIOCCLRFOUND: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | vtx_pagereq_t *req = arg; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 351 | return -EINVAL; |
| 352 | t->vdau[req->pgbuf].clrfound = TRUE; |
| 353 | return 0; |
| 354 | } |
| 355 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 356 | case VTXIOCPAGEREQ: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
| 358 | vtx_pagereq_t *req = arg; |
| 359 | if (!(req->pagemask & PGMASK_PAGE)) |
| 360 | req->page = 0; |
| 361 | if (!(req->pagemask & PGMASK_HOUR)) |
| 362 | req->hour = 0; |
| 363 | if (!(req->pagemask & PGMASK_MINUTE)) |
| 364 | req->minute = 0; |
| 365 | if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */ |
| 366 | return -EINVAL; |
| 367 | req->page &= 0x7ff; |
| 368 | if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f || |
| 369 | req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 370 | return -EINVAL; |
| 371 | t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100); |
| 372 | t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf); |
| 373 | t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf); |
| 374 | t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10); |
| 375 | t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf); |
| 376 | t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10); |
| 377 | t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf); |
| 378 | t->vdau[req->pgbuf].stopped = FALSE; |
| 379 | t->vdau[req->pgbuf].clrfound = TRUE; |
| 380 | t->is_searching[req->pgbuf] = TRUE; |
| 381 | return 0; |
| 382 | } |
| 383 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 384 | case VTXIOCGETSTAT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | { |
| 386 | vtx_pagereq_t *req = arg; |
| 387 | u8 infobits[10]; |
| 388 | vtx_pageinfo_t info; |
| 389 | int a; |
| 390 | |
| 391 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 392 | return -EINVAL; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 393 | if (!t->vdau[req->pgbuf].stopped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
| 395 | if (i2c_senddata(t, 2, 0, -1) || |
| 396 | i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) || |
| 397 | i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) || |
| 398 | i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) || |
| 399 | i2c_senddata(t, 8, 0, 25, 0, -1)) |
| 400 | return -EIO; |
| 401 | jdelay(PAGE_WAIT); |
| 402 | if (i2c_getdata(t, 10, infobits)) |
| 403 | return -EIO; |
| 404 | |
| 405 | if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 406 | (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | time_after_eq(jiffies, t->vdau[req->pgbuf].expire))) |
| 408 | { /* check if new page arrived */ |
| 409 | if (i2c_senddata(t, 8, 0, 0, 0, -1) || |
| 410 | i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf)) |
| 411 | return -EIO; |
| 412 | t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE; |
| 413 | memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 414 | if (t->virtual_mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
| 416 | /* Packet X/24 */ |
| 417 | if (i2c_senddata(t, 8, 0, 0x20, 0, -1) || |
| 418 | i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40)) |
| 419 | return -EIO; |
| 420 | /* Packet X/27/0 */ |
| 421 | if (i2c_senddata(t, 8, 0, 0x21, 0, -1) || |
| 422 | i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40)) |
| 423 | return -EIO; |
| 424 | /* Packet 8/30/0...8/30/15 |
| 425 | * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30, |
| 426 | * so we should undo this here. |
| 427 | */ |
| 428 | if (i2c_senddata(t, 8, 0, 0x22, 0, -1) || |
| 429 | i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40)) |
| 430 | return -EIO; |
| 431 | } |
| 432 | t->vdau[req->pgbuf].clrfound = FALSE; |
| 433 | memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits)); |
| 434 | } |
| 435 | else |
| 436 | { |
| 437 | memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)); |
| 438 | } |
| 439 | } |
| 440 | else |
| 441 | { |
| 442 | memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)); |
| 443 | } |
| 444 | |
| 445 | info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f); |
| 446 | if (info.pagenum < 0x100) |
| 447 | info.pagenum += 0x800; |
| 448 | info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f); |
| 449 | info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f); |
| 450 | info.charset = ((infobits[7] >> 1) & 7); |
| 451 | info.delete = !!(infobits[3] & 8); |
| 452 | info.headline = !!(infobits[5] & 4); |
| 453 | info.subtitle = !!(infobits[5] & 8); |
| 454 | info.supp_header = !!(infobits[6] & 1); |
| 455 | info.update = !!(infobits[6] & 2); |
| 456 | info.inter_seq = !!(infobits[6] & 4); |
| 457 | info.dis_disp = !!(infobits[6] & 8); |
| 458 | info.serial = !!(infobits[7] & 1); |
| 459 | info.notfound = !!(infobits[8] & 0x10); |
| 460 | info.pblf = !!(infobits[9] & 0x20); |
| 461 | info.hamming = 0; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 462 | for (a = 0; a <= 7; a++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 464 | if (infobits[a] & 0xf0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
| 466 | info.hamming = 1; |
| 467 | break; |
| 468 | } |
| 469 | } |
| 470 | if (t->vdau[req->pgbuf].clrfound) |
| 471 | info.notfound = 1; |
| 472 | if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t))) |
| 473 | return -EFAULT; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 474 | if (!info.hamming && !info.notfound) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | { |
| 476 | t->is_searching[req->pgbuf] = FALSE; |
| 477 | } |
| 478 | return 0; |
| 479 | } |
| 480 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 481 | case VTXIOCGETPAGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | { |
| 483 | vtx_pagereq_t *req = arg; |
| 484 | int start, end; |
| 485 | |
| 486 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 || |
| 487 | req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE)) |
| 488 | return -EINVAL; |
| 489 | if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1)) |
| 490 | return -EFAULT; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 491 | |
| 492 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | * Always read the time directly from SAA5249 |
| 494 | */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 495 | |
| 496 | if (req->start <= 39 && req->end >= 32) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
| 498 | int len; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 499 | char buf[16]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | start = max(req->start, 32); |
| 501 | end = min(req->end, 39); |
| 502 | len=end-start+1; |
| 503 | if (i2c_senddata(t, 8, 0, 0, start, -1) || |
| 504 | i2c_getdata(t, len, buf)) |
| 505 | return -EIO; |
| 506 | if(copy_to_user(req->buffer+start-req->start, buf, len)) |
| 507 | return -EFAULT; |
| 508 | } |
| 509 | /* Insert the current header if DAU is still searching for a page */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 510 | if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | { |
| 512 | char buf[32]; |
| 513 | int len; |
| 514 | start = max(req->start, 7); |
| 515 | end = min(req->end, 31); |
| 516 | len=end-start+1; |
| 517 | if (i2c_senddata(t, 8, 0, 0, start, -1) || |
| 518 | i2c_getdata(t, len, buf)) |
| 519 | return -EIO; |
| 520 | if(copy_to_user(req->buffer+start-req->start, buf, len)) |
| 521 | return -EFAULT; |
| 522 | } |
| 523 | return 0; |
| 524 | } |
| 525 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 526 | case VTXIOCSTOPDAU: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | { |
| 528 | vtx_pagereq_t *req = arg; |
| 529 | |
| 530 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 531 | return -EINVAL; |
| 532 | t->vdau[req->pgbuf].stopped = TRUE; |
| 533 | t->is_searching[req->pgbuf] = FALSE; |
| 534 | return 0; |
| 535 | } |
| 536 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 537 | case VTXIOCPUTPAGE: |
| 538 | case VTXIOCSETDISP: |
| 539 | case VTXIOCPUTSTAT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | return 0; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 541 | |
| 542 | case VTXIOCCLRCACHE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | { |
| 544 | if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11, |
| 545 | ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', |
| 546 | ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1)) |
| 547 | return -EIO; |
| 548 | if (i2c_senddata(t, 3, 0x20, -1)) |
| 549 | return -EIO; |
| 550 | jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */ |
| 551 | return 0; |
| 552 | } |
| 553 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 554 | case VTXIOCSETVIRT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | { |
| 556 | /* The SAA5249 has virtual-row reception turned on always */ |
| 557 | t->virtual_mode = (int)(long)arg; |
| 558 | return 0; |
| 559 | } |
| 560 | } |
| 561 | return -EINVAL; |
| 562 | } |
| 563 | |
| 564 | /* |
| 565 | * Translates old vtx IOCTLs to new ones |
| 566 | * |
| 567 | * This keeps new kernel versions compatible with old userspace programs. |
| 568 | */ |
| 569 | static inline unsigned int vtx_fix_command(unsigned int cmd) |
| 570 | { |
| 571 | switch (cmd) { |
| 572 | case VTXIOCGETINFO_OLD: |
| 573 | cmd = VTXIOCGETINFO; |
| 574 | break; |
| 575 | case VTXIOCCLRPAGE_OLD: |
| 576 | cmd = VTXIOCCLRPAGE; |
| 577 | break; |
| 578 | case VTXIOCCLRFOUND_OLD: |
| 579 | cmd = VTXIOCCLRFOUND; |
| 580 | break; |
| 581 | case VTXIOCPAGEREQ_OLD: |
| 582 | cmd = VTXIOCPAGEREQ; |
| 583 | break; |
| 584 | case VTXIOCGETSTAT_OLD: |
| 585 | cmd = VTXIOCGETSTAT; |
| 586 | break; |
| 587 | case VTXIOCGETPAGE_OLD: |
| 588 | cmd = VTXIOCGETPAGE; |
| 589 | break; |
| 590 | case VTXIOCSTOPDAU_OLD: |
| 591 | cmd = VTXIOCSTOPDAU; |
| 592 | break; |
| 593 | case VTXIOCPUTPAGE_OLD: |
| 594 | cmd = VTXIOCPUTPAGE; |
| 595 | break; |
| 596 | case VTXIOCSETDISP_OLD: |
| 597 | cmd = VTXIOCSETDISP; |
| 598 | break; |
| 599 | case VTXIOCPUTSTAT_OLD: |
| 600 | cmd = VTXIOCPUTSTAT; |
| 601 | break; |
| 602 | case VTXIOCCLRCACHE_OLD: |
| 603 | cmd = VTXIOCCLRCACHE; |
| 604 | break; |
| 605 | case VTXIOCSETVIRT_OLD: |
| 606 | cmd = VTXIOCSETVIRT; |
| 607 | break; |
| 608 | } |
| 609 | return cmd; |
| 610 | } |
| 611 | |
| 612 | /* |
| 613 | * Handle the locking |
| 614 | */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 615 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | static int saa5249_ioctl(struct inode *inode, struct file *file, |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 617 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
| 619 | struct video_device *vd = video_devdata(file); |
| 620 | struct saa5249_device *t=vd->priv; |
| 621 | int err; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | cmd = vtx_fix_command(cmd); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 624 | mutex_lock(&t->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 626 | mutex_unlock(&t->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return err; |
| 628 | } |
| 629 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 630 | static int saa5249_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | { |
| 632 | struct video_device *vd = video_devdata(file); |
| 633 | struct saa5249_device *t=vd->priv; |
| 634 | int err,pgbuf; |
| 635 | |
| 636 | err = video_exclusive_open(inode,file); |
| 637 | if (err < 0) |
| 638 | return err; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 639 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | if (t->client==NULL) { |
| 641 | err = -ENODEV; |
| 642 | goto fail; |
| 643 | } |
| 644 | |
| 645 | if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */ |
| 646 | /* Turn off parity checks (we do this ourselves) */ |
| 647 | i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) || |
| 648 | /* Display TV-picture, no virtual rows */ |
| 649 | i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1)) /* Set display to page 4 */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
| 652 | err = -EIO; |
| 653 | goto fail; |
| 654 | } |
| 655 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 656 | for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | { |
| 658 | memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf)); |
| 659 | memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs)); |
| 660 | memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat)); |
| 661 | t->vdau[pgbuf].expire = 0; |
| 662 | t->vdau[pgbuf].clrfound = TRUE; |
| 663 | t->vdau[pgbuf].stopped = TRUE; |
| 664 | t->is_searching[pgbuf] = FALSE; |
| 665 | } |
| 666 | t->virtual_mode=FALSE; |
| 667 | return 0; |
| 668 | |
| 669 | fail: |
| 670 | video_exclusive_release(inode,file); |
| 671 | return err; |
| 672 | } |
| 673 | |
| 674 | |
| 675 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 676 | static int saa5249_release(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | { |
| 678 | struct video_device *vd = video_devdata(file); |
| 679 | struct saa5249_device *t=vd->priv; |
| 680 | i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */ |
| 681 | i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */ |
| 682 | video_exclusive_release(inode,file); |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static int __init init_saa_5249 (void) |
| 687 | { |
| 688 | printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n", |
| 689 | VTX_VER_MAJ, VTX_VER_MIN); |
| 690 | return i2c_add_driver(&i2c_driver_videotext); |
| 691 | } |
| 692 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 693 | static void __exit cleanup_saa_5249 (void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
| 695 | i2c_del_driver(&i2c_driver_videotext); |
| 696 | } |
| 697 | |
| 698 | module_init(init_saa_5249); |
| 699 | module_exit(cleanup_saa_5249); |
| 700 | |
| 701 | static struct file_operations saa_fops = { |
| 702 | .owner = THIS_MODULE, |
| 703 | .open = saa5249_open, |
| 704 | .release = saa5249_release, |
| 705 | .ioctl = saa5249_ioctl, |
Arnd Bergmann | 0d0fbf8 | 2006-01-09 15:24:57 -0200 | [diff] [blame] | 706 | .compat_ioctl = v4l_compat_ioctl32, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | .llseek = no_llseek, |
| 708 | }; |
| 709 | |
| 710 | static struct video_device saa_template = |
| 711 | { |
| 712 | .owner = THIS_MODULE, |
| 713 | .name = IF_NAME, |
| 714 | .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */ |
| 715 | .hardware = VID_HARDWARE_SAA5249, |
| 716 | .fops = &saa_fops, |
| 717 | }; |
| 718 | |
| 719 | MODULE_LICENSE("GPL"); |