| 1 | /* Derived from Applicom driver ac.c for SCO Unix */ |
| 2 | /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */ |
| 3 | /* dwmw2@infradead.org 30/8/98 */ |
| 4 | /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */ |
| 5 | /* This module is for Linux 2.1 and 2.2 series kernels. */ |
| 6 | /*****************************************************************************/ |
| 7 | /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */ |
| 8 | /* ceci pour reseter correctement apres une sortie sauvage */ |
| 9 | /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */ |
| 10 | /* LoopCount n'etait pas initialise a 0. */ |
| 11 | /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */ |
| 12 | /* pour liberer le bus */ |
| 13 | /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */ |
| 14 | /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */ |
| 15 | /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */ |
| 16 | /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */ |
| 17 | /* adresses de base des cartes, IOCTL 6 plus complet */ |
| 18 | /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */ |
| 19 | /* de code autre que le texte V2.6.1 en V2.8.0 */ |
| 20 | /*****************************************************************************/ |
| 21 | |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/miscdevice.h> |
| 29 | #include <linux/pci.h> |
| 30 | #include <linux/wait.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/fs.h> |
| 33 | |
| 34 | #include <asm/io.h> |
| 35 | #include <asm/uaccess.h> |
| 36 | |
| 37 | #include "applicom.h" |
| 38 | |
| 39 | |
| 40 | /* NOTE: We use for loops with {write,read}b() instead of |
| 41 | memcpy_{from,to}io throughout this driver. This is because |
| 42 | the board doesn't correctly handle word accesses - only |
| 43 | bytes. |
| 44 | */ |
| 45 | |
| 46 | |
| 47 | #undef DEBUG |
| 48 | |
| 49 | #define MAX_BOARD 8 /* maximum of pc board possible */ |
| 50 | #define MAX_ISA_BOARD 4 |
| 51 | #define LEN_RAM_IO 0x800 |
| 52 | #define AC_MINOR 157 |
| 53 | |
| 54 | #ifndef PCI_VENDOR_ID_APPLICOM |
| 55 | #define PCI_VENDOR_ID_APPLICOM 0x1389 |
| 56 | #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 |
| 57 | #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 |
| 58 | #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 |
| 59 | #endif |
| 60 | |
| 61 | static char *applicom_pci_devnames[] = { |
| 62 | "PCI board", |
| 63 | "PCI2000IBS / PCI2000CAN", |
| 64 | "PCI2000PFB" |
| 65 | }; |
| 66 | |
| 67 | static struct pci_device_id applicom_pci_tbl[] = { |
| 68 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, |
| 69 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, |
| 70 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, |
| 71 | { 0 } |
| 72 | }; |
| 73 | MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); |
| 74 | |
| 75 | MODULE_AUTHOR("David Woodhouse & Applicom International"); |
| 76 | MODULE_DESCRIPTION("Driver for Applicom Profibus card"); |
| 77 | MODULE_LICENSE("GPL"); |
| 78 | MODULE_ALIAS_MISCDEV(AC_MINOR); |
| 79 | |
| 80 | MODULE_SUPPORTED_DEVICE("ac"); |
| 81 | |
| 82 | |
| 83 | static struct applicom_board { |
| 84 | unsigned long PhysIO; |
| 85 | void __iomem *RamIO; |
| 86 | wait_queue_head_t FlagSleepSend; |
| 87 | long irq; |
| 88 | spinlock_t mutex; |
| 89 | } apbs[MAX_BOARD]; |
| 90 | |
| 91 | static unsigned int irq = 0; /* interrupt number IRQ */ |
| 92 | static unsigned long mem = 0; /* physical segment of board */ |
| 93 | |
| 94 | module_param(irq, uint, 0); |
| 95 | MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); |
| 96 | module_param(mem, ulong, 0); |
| 97 | MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); |
| 98 | |
| 99 | static unsigned int numboards; /* number of installed boards */ |
| 100 | static volatile unsigned char Dummy; |
| 101 | static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); |
| 102 | static unsigned int WriteErrorCount; /* number of write error */ |
| 103 | static unsigned int ReadErrorCount; /* number of read error */ |
| 104 | static unsigned int DeviceErrorCount; /* number of device error */ |
| 105 | |
| 106 | static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); |
| 107 | static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); |
| 108 | static int ac_ioctl(struct inode *, struct file *, unsigned int, |
| 109 | unsigned long); |
| 110 | static irqreturn_t ac_interrupt(int, void *); |
| 111 | |
| 112 | static const struct file_operations ac_fops = { |
| 113 | .owner = THIS_MODULE, |
| 114 | .llseek = no_llseek, |
| 115 | .read = ac_read, |
| 116 | .write = ac_write, |
| 117 | .ioctl = ac_ioctl, |
| 118 | }; |
| 119 | |
| 120 | static struct miscdevice ac_miscdev = { |
| 121 | AC_MINOR, |
| 122 | "ac", |
| 123 | &ac_fops |
| 124 | }; |
| 125 | |
| 126 | static int dummy; /* dev_id for request_irq() */ |
| 127 | |
| 128 | static int ac_register_board(unsigned long physloc, void __iomem *loc, |
| 129 | unsigned char boardno) |
| 130 | { |
| 131 | volatile unsigned char byte_reset_it; |
| 132 | |
| 133 | if((readb(loc + CONF_END_TEST) != 0x00) || |
| 134 | (readb(loc + CONF_END_TEST + 1) != 0x55) || |
| 135 | (readb(loc + CONF_END_TEST + 2) != 0xAA) || |
| 136 | (readb(loc + CONF_END_TEST + 3) != 0xFF)) |
| 137 | return 0; |
| 138 | |
| 139 | if (!boardno) |
| 140 | boardno = readb(loc + NUMCARD_OWNER_TO_PC); |
| 141 | |
| 142 | if (!boardno || boardno > MAX_BOARD) { |
| 143 | printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", |
| 144 | boardno, physloc, MAX_BOARD); |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | if (apbs[boardno - 1].RamIO) { |
| 149 | printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", |
| 150 | boardno, physloc, boardno, apbs[boardno-1].PhysIO); |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | boardno--; |
| 155 | |
| 156 | apbs[boardno].PhysIO = physloc; |
| 157 | apbs[boardno].RamIO = loc; |
| 158 | init_waitqueue_head(&apbs[boardno].FlagSleepSend); |
| 159 | spin_lock_init(&apbs[boardno].mutex); |
| 160 | byte_reset_it = readb(loc + RAM_IT_TO_PC); |
| 161 | |
| 162 | numboards++; |
| 163 | return boardno + 1; |
| 164 | } |
| 165 | |
| 166 | static void __exit applicom_exit(void) |
| 167 | { |
| 168 | unsigned int i; |
| 169 | |
| 170 | misc_deregister(&ac_miscdev); |
| 171 | |
| 172 | for (i = 0; i < MAX_BOARD; i++) { |
| 173 | |
| 174 | if (!apbs[i].RamIO) |
| 175 | continue; |
| 176 | |
| 177 | if (apbs[i].irq) |
| 178 | free_irq(apbs[i].irq, &dummy); |
| 179 | |
| 180 | iounmap(apbs[i].RamIO); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | static int __init applicom_init(void) |
| 185 | { |
| 186 | int i, numisa = 0; |
| 187 | struct pci_dev *dev = NULL; |
| 188 | void __iomem *RamIO; |
| 189 | int boardno, ret; |
| 190 | |
| 191 | printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); |
| 192 | |
| 193 | /* No mem and irq given - check for a PCI card */ |
| 194 | |
| 195 | while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { |
| 196 | |
| 197 | if (!pci_match_id(applicom_pci_tbl, dev)) |
| 198 | continue; |
| 199 | |
| 200 | if (pci_enable_device(dev)) |
| 201 | return -EIO; |
| 202 | |
| 203 | RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO); |
| 204 | |
| 205 | if (!RamIO) { |
| 206 | printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " |
| 207 | "space at 0x%llx\n", |
| 208 | (unsigned long long)pci_resource_start(dev, 0)); |
| 209 | pci_disable_device(dev); |
| 210 | return -EIO; |
| 211 | } |
| 212 | |
| 213 | printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", |
| 214 | applicom_pci_devnames[dev->device-1], |
| 215 | (unsigned long long)pci_resource_start(dev, 0), |
| 216 | dev->irq); |
| 217 | |
| 218 | boardno = ac_register_board(pci_resource_start(dev, 0), |
| 219 | RamIO, 0); |
| 220 | if (!boardno) { |
| 221 | printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); |
| 222 | iounmap(RamIO); |
| 223 | pci_disable_device(dev); |
| 224 | continue; |
| 225 | } |
| 226 | |
| 227 | if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { |
| 228 | printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); |
| 229 | iounmap(RamIO); |
| 230 | pci_disable_device(dev); |
| 231 | apbs[boardno - 1].RamIO = NULL; |
| 232 | continue; |
| 233 | } |
| 234 | |
| 235 | /* Enable interrupts. */ |
| 236 | |
| 237 | writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); |
| 238 | |
| 239 | apbs[boardno - 1].irq = dev->irq; |
| 240 | } |
| 241 | |
| 242 | /* Finished with PCI cards. If none registered, |
| 243 | * and there was no mem/irq specified, exit */ |
| 244 | |
| 245 | if (!mem || !irq) { |
| 246 | if (numboards) |
| 247 | goto fin; |
| 248 | else { |
| 249 | printk(KERN_INFO "ac.o: No PCI boards found.\n"); |
| 250 | printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); |
| 251 | return -ENXIO; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /* Now try the specified ISA cards */ |
| 256 | |
| 257 | for (i = 0; i < MAX_ISA_BOARD; i++) { |
| 258 | RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO); |
| 259 | |
| 260 | if (!RamIO) { |
| 261 | printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); |
| 262 | continue; |
| 263 | } |
| 264 | |
| 265 | if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), |
| 266 | RamIO,i+1))) { |
| 267 | iounmap(RamIO); |
| 268 | continue; |
| 269 | } |
| 270 | |
| 271 | printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); |
| 272 | |
| 273 | if (!numisa) { |
| 274 | if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { |
| 275 | printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); |
| 276 | iounmap(RamIO); |
| 277 | apbs[boardno - 1].RamIO = NULL; |
| 278 | } |
| 279 | else |
| 280 | apbs[boardno - 1].irq = irq; |
| 281 | } |
| 282 | else |
| 283 | apbs[boardno - 1].irq = 0; |
| 284 | |
| 285 | numisa++; |
| 286 | } |
| 287 | |
| 288 | if (!numisa) |
| 289 | printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " |
| 290 | "at mem 0x%lx\n", mem); |
| 291 | |
| 292 | fin: |
| 293 | init_waitqueue_head(&FlagSleepRec); |
| 294 | |
| 295 | WriteErrorCount = 0; |
| 296 | ReadErrorCount = 0; |
| 297 | DeviceErrorCount = 0; |
| 298 | |
| 299 | if (numboards) { |
| 300 | ret = misc_register(&ac_miscdev); |
| 301 | if (ret) { |
| 302 | printk(KERN_WARNING "ac.o: Unable to register misc device\n"); |
| 303 | goto out; |
| 304 | } |
| 305 | for (i = 0; i < MAX_BOARD; i++) { |
| 306 | int serial; |
| 307 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; |
| 308 | |
| 309 | if (!apbs[i].RamIO) |
| 310 | continue; |
| 311 | |
| 312 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) |
| 313 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); |
| 314 | |
| 315 | boardname[serial] = 0; |
| 316 | |
| 317 | |
| 318 | printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", |
| 319 | i+1, boardname, |
| 320 | (int)(readb(apbs[i].RamIO + VERS) >> 4), |
| 321 | (int)(readb(apbs[i].RamIO + VERS) & 0xF)); |
| 322 | |
| 323 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + |
| 324 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + |
| 325 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); |
| 326 | |
| 327 | if (serial != 0) |
| 328 | printk(" S/N %d\n", serial); |
| 329 | else |
| 330 | printk("\n"); |
| 331 | } |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | else |
| 336 | return -ENXIO; |
| 337 | |
| 338 | out: |
| 339 | for (i = 0; i < MAX_BOARD; i++) { |
| 340 | if (!apbs[i].RamIO) |
| 341 | continue; |
| 342 | if (apbs[i].irq) |
| 343 | free_irq(apbs[i].irq, &dummy); |
| 344 | iounmap(apbs[i].RamIO); |
| 345 | } |
| 346 | pci_disable_device(dev); |
| 347 | return ret; |
| 348 | } |
| 349 | |
| 350 | module_init(applicom_init); |
| 351 | module_exit(applicom_exit); |
| 352 | |
| 353 | |
| 354 | static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) |
| 355 | { |
| 356 | unsigned int NumCard; /* Board number 1 -> 8 */ |
| 357 | unsigned int IndexCard; /* Index board number 0 -> 7 */ |
| 358 | unsigned char TicCard; /* Board TIC to send */ |
| 359 | unsigned long flags; /* Current priority */ |
| 360 | struct st_ram_io st_loc; |
| 361 | struct mailbox tmpmailbox; |
| 362 | #ifdef DEBUG |
| 363 | int c; |
| 364 | #endif |
| 365 | DECLARE_WAITQUEUE(wait, current); |
| 366 | |
| 367 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { |
| 368 | static int warncount = 5; |
| 369 | if (warncount) { |
| 370 | printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", |
| 371 | count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
| 372 | warncount--; |
| 373 | } |
| 374 | return -EINVAL; |
| 375 | } |
| 376 | |
| 377 | if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) |
| 378 | return -EFAULT; |
| 379 | |
| 380 | if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], |
| 381 | sizeof(struct mailbox))) |
| 382 | return -EFAULT; |
| 383 | |
| 384 | NumCard = st_loc.num_card; /* board number to send */ |
| 385 | TicCard = st_loc.tic_des_from_pc; /* tic number to send */ |
| 386 | IndexCard = NumCard - 1; |
| 387 | |
| 388 | if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO) |
| 389 | return -EINVAL; |
| 390 | |
| 391 | #ifdef DEBUG |
| 392 | printk("Write to applicom card #%d. struct st_ram_io follows:", |
| 393 | IndexCard+1); |
| 394 | |
| 395 | for (c = 0; c < sizeof(struct st_ram_io);) { |
| 396 | |
| 397 | printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); |
| 398 | |
| 399 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { |
| 400 | printk(" %2.2X", ((unsigned char *) &st_loc)[c]); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | printk("\nstruct mailbox follows:"); |
| 405 | |
| 406 | for (c = 0; c < sizeof(struct mailbox);) { |
| 407 | printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); |
| 408 | |
| 409 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { |
| 410 | printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | printk("\n"); |
| 415 | #endif |
| 416 | |
| 417 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); |
| 418 | |
| 419 | /* Test octet ready correct */ |
| 420 | if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { |
| 421 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
| 422 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); |
| 423 | printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", |
| 424 | IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); |
| 425 | DeviceErrorCount++; |
| 426 | return -EIO; |
| 427 | } |
| 428 | |
| 429 | /* Place ourselves on the wait queue */ |
| 430 | set_current_state(TASK_INTERRUPTIBLE); |
| 431 | add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); |
| 432 | |
| 433 | /* Check whether the card is ready for us */ |
| 434 | while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { |
| 435 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
| 436 | /* It's busy. Sleep. */ |
| 437 | |
| 438 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); |
| 439 | schedule(); |
| 440 | if (signal_pending(current)) { |
| 441 | remove_wait_queue(&apbs[IndexCard].FlagSleepSend, |
| 442 | &wait); |
| 443 | return -EINTR; |
| 444 | } |
| 445 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); |
| 446 | set_current_state(TASK_INTERRUPTIBLE); |
| 447 | } |
| 448 | |
| 449 | /* We may not have actually slept */ |
| 450 | set_current_state(TASK_RUNNING); |
| 451 | remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); |
| 452 | |
| 453 | writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
| 454 | |
| 455 | /* Which is best - lock down the pages with rawio and then |
| 456 | copy directly, or use bounce buffers? For now we do the latter |
| 457 | because it works with 2.2 still */ |
| 458 | { |
| 459 | unsigned char *from = (unsigned char *) &tmpmailbox; |
| 460 | void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; |
| 461 | int c; |
| 462 | |
| 463 | for (c = 0; c < sizeof(struct mailbox); c++) |
| 464 | writeb(*(from++), to++); |
| 465 | } |
| 466 | |
| 467 | writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); |
| 468 | writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); |
| 469 | writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); |
| 470 | writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); |
| 471 | writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
| 472 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
| 473 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
| 474 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static int do_ac_read(int IndexCard, char __user *buf, |
| 479 | struct st_ram_io *st_loc, struct mailbox *mailbox) |
| 480 | { |
| 481 | void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; |
| 482 | unsigned char *to = (unsigned char *)mailbox; |
| 483 | #ifdef DEBUG |
| 484 | int c; |
| 485 | #endif |
| 486 | |
| 487 | st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); |
| 488 | st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); |
| 489 | |
| 490 | |
| 491 | { |
| 492 | int c; |
| 493 | |
| 494 | for (c = 0; c < sizeof(struct mailbox); c++) |
| 495 | *(to++) = readb(from++); |
| 496 | } |
| 497 | writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); |
| 498 | writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); |
| 499 | writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); |
| 500 | writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), |
| 501 | apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); |
| 502 | writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); |
| 503 | writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); |
| 504 | writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
| 505 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
| 506 | |
| 507 | #ifdef DEBUG |
| 508 | printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); |
| 509 | |
| 510 | for (c = 0; c < sizeof(struct st_ram_io);) { |
| 511 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); |
| 512 | |
| 513 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { |
| 514 | printk(" %2.2X", ((unsigned char *)st_loc)[c]); |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | printk("\nstruct mailbox follows:"); |
| 519 | |
| 520 | for (c = 0; c < sizeof(struct mailbox);) { |
| 521 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); |
| 522 | |
| 523 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { |
| 524 | printk(" %2.2X", ((unsigned char *)mailbox)[c]); |
| 525 | } |
| 526 | } |
| 527 | printk("\n"); |
| 528 | #endif |
| 529 | return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
| 530 | } |
| 531 | |
| 532 | static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) |
| 533 | { |
| 534 | unsigned long flags; |
| 535 | unsigned int i; |
| 536 | unsigned char tmp; |
| 537 | int ret = 0; |
| 538 | DECLARE_WAITQUEUE(wait, current); |
| 539 | #ifdef DEBUG |
| 540 | int loopcount=0; |
| 541 | #endif |
| 542 | /* No need to ratelimit this. Only root can trigger it anyway */ |
| 543 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { |
| 544 | printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", |
| 545 | count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
| 546 | return -EINVAL; |
| 547 | } |
| 548 | |
| 549 | while(1) { |
| 550 | /* Stick ourself on the wait queue */ |
| 551 | set_current_state(TASK_INTERRUPTIBLE); |
| 552 | add_wait_queue(&FlagSleepRec, &wait); |
| 553 | |
| 554 | /* Scan each board, looking for one which has a packet for us */ |
| 555 | for (i=0; i < MAX_BOARD; i++) { |
| 556 | if (!apbs[i].RamIO) |
| 557 | continue; |
| 558 | spin_lock_irqsave(&apbs[i].mutex, flags); |
| 559 | |
| 560 | tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); |
| 561 | |
| 562 | if (tmp == 2) { |
| 563 | struct st_ram_io st_loc; |
| 564 | struct mailbox mailbox; |
| 565 | |
| 566 | /* Got a packet for us */ |
| 567 | ret = do_ac_read(i, buf, &st_loc, &mailbox); |
| 568 | spin_unlock_irqrestore(&apbs[i].mutex, flags); |
| 569 | set_current_state(TASK_RUNNING); |
| 570 | remove_wait_queue(&FlagSleepRec, &wait); |
| 571 | |
| 572 | if (copy_to_user(buf, &st_loc, sizeof(st_loc))) |
| 573 | return -EFAULT; |
| 574 | if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) |
| 575 | return -EFAULT; |
| 576 | return tmp; |
| 577 | } |
| 578 | |
| 579 | if (tmp > 2) { |
| 580 | /* Got an error */ |
| 581 | Dummy = readb(apbs[i].RamIO + VERS); |
| 582 | |
| 583 | spin_unlock_irqrestore(&apbs[i].mutex, flags); |
| 584 | set_current_state(TASK_RUNNING); |
| 585 | remove_wait_queue(&FlagSleepRec, &wait); |
| 586 | |
| 587 | printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", |
| 588 | i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); |
| 589 | DeviceErrorCount++; |
| 590 | return -EIO; |
| 591 | } |
| 592 | |
| 593 | /* Nothing for us. Try the next board */ |
| 594 | Dummy = readb(apbs[i].RamIO + VERS); |
| 595 | spin_unlock_irqrestore(&apbs[i].mutex, flags); |
| 596 | |
| 597 | } /* per board */ |
| 598 | |
| 599 | /* OK - No boards had data for us. Sleep now */ |
| 600 | |
| 601 | schedule(); |
| 602 | remove_wait_queue(&FlagSleepRec, &wait); |
| 603 | |
| 604 | if (signal_pending(current)) |
| 605 | return -EINTR; |
| 606 | |
| 607 | #ifdef DEBUG |
| 608 | if (loopcount++ > 2) { |
| 609 | printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); |
| 610 | } |
| 611 | #endif |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | static irqreturn_t ac_interrupt(int vec, void *dev_instance) |
| 616 | { |
| 617 | unsigned int i; |
| 618 | unsigned int FlagInt; |
| 619 | unsigned int LoopCount; |
| 620 | int handled = 0; |
| 621 | |
| 622 | // printk("Applicom interrupt on IRQ %d occurred\n", vec); |
| 623 | |
| 624 | LoopCount = 0; |
| 625 | |
| 626 | do { |
| 627 | FlagInt = 0; |
| 628 | for (i = 0; i < MAX_BOARD; i++) { |
| 629 | |
| 630 | /* Skip if this board doesn't exist */ |
| 631 | if (!apbs[i].RamIO) |
| 632 | continue; |
| 633 | |
| 634 | spin_lock(&apbs[i].mutex); |
| 635 | |
| 636 | /* Skip if this board doesn't want attention */ |
| 637 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { |
| 638 | spin_unlock(&apbs[i].mutex); |
| 639 | continue; |
| 640 | } |
| 641 | |
| 642 | handled = 1; |
| 643 | FlagInt = 1; |
| 644 | writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); |
| 645 | |
| 646 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { |
| 647 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", |
| 648 | i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); |
| 649 | DeviceErrorCount++; |
| 650 | } |
| 651 | |
| 652 | if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && |
| 653 | (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { |
| 654 | |
| 655 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", |
| 656 | i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); |
| 657 | DeviceErrorCount++; |
| 658 | } |
| 659 | |
| 660 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ |
| 661 | if (waitqueue_active(&FlagSleepRec)) { |
| 662 | wake_up_interruptible(&FlagSleepRec); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ |
| 667 | if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ |
| 668 | wake_up_interruptible(&apbs[i].FlagSleepSend); |
| 669 | } |
| 670 | } |
| 671 | Dummy = readb(apbs[i].RamIO + VERS); |
| 672 | |
| 673 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { |
| 674 | /* There's another int waiting on this card */ |
| 675 | spin_unlock(&apbs[i].mutex); |
| 676 | i--; |
| 677 | } else { |
| 678 | spin_unlock(&apbs[i].mutex); |
| 679 | } |
| 680 | } |
| 681 | if (FlagInt) |
| 682 | LoopCount = 0; |
| 683 | else |
| 684 | LoopCount++; |
| 685 | } while(LoopCount < 2); |
| 686 | return IRQ_RETVAL(handled); |
| 687 | } |
| 688 | |
| 689 | |
| 690 | |
| 691 | static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
| 692 | |
| 693 | { /* @ ADG ou ATO selon le cas */ |
| 694 | int i; |
| 695 | unsigned char IndexCard; |
| 696 | void __iomem *pmem; |
| 697 | int ret = 0; |
| 698 | volatile unsigned char byte_reset_it; |
| 699 | struct st_ram_io *adgl; |
| 700 | void __user *argp = (void __user *)arg; |
| 701 | |
| 702 | /* In general, the device is only openable by root anyway, so we're not |
| 703 | particularly concerned that bogus ioctls can flood the console. */ |
| 704 | |
| 705 | adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL); |
| 706 | if (!adgl) |
| 707 | return -ENOMEM; |
| 708 | |
| 709 | if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) { |
| 710 | kfree(adgl); |
| 711 | return -EFAULT; |
| 712 | } |
| 713 | |
| 714 | IndexCard = adgl->num_card-1; |
| 715 | |
| 716 | if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { |
| 717 | static int warncount = 10; |
| 718 | if (warncount) { |
| 719 | printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); |
| 720 | warncount--; |
| 721 | } |
| 722 | kfree(adgl); |
| 723 | return -EINVAL; |
| 724 | } |
| 725 | |
| 726 | switch (cmd) { |
| 727 | |
| 728 | case 0: |
| 729 | pmem = apbs[IndexCard].RamIO; |
| 730 | for (i = 0; i < sizeof(struct st_ram_io); i++) |
| 731 | ((unsigned char *)adgl)[i]=readb(pmem++); |
| 732 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) |
| 733 | ret = -EFAULT; |
| 734 | break; |
| 735 | case 1: |
| 736 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; |
| 737 | for (i = 0; i < 4; i++) |
| 738 | adgl->conf_end_test[i] = readb(pmem++); |
| 739 | for (i = 0; i < 2; i++) |
| 740 | adgl->error_code[i] = readb(pmem++); |
| 741 | for (i = 0; i < 4; i++) |
| 742 | adgl->parameter_error[i] = readb(pmem++); |
| 743 | pmem = apbs[IndexCard].RamIO + VERS; |
| 744 | adgl->vers = readb(pmem); |
| 745 | pmem = apbs[IndexCard].RamIO + TYPE_CARD; |
| 746 | for (i = 0; i < 20; i++) |
| 747 | adgl->reserv1[i] = readb(pmem++); |
| 748 | *(int *)&adgl->reserv1[20] = |
| 749 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + |
| 750 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + |
| 751 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); |
| 752 | |
| 753 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) |
| 754 | ret = -EFAULT; |
| 755 | break; |
| 756 | case 2: |
| 757 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; |
| 758 | for (i = 0; i < 10; i++) |
| 759 | writeb(0xff, pmem++); |
| 760 | writeb(adgl->data_from_pc_ready, |
| 761 | apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
| 762 | |
| 763 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
| 764 | |
| 765 | for (i = 0; i < MAX_BOARD; i++) { |
| 766 | if (apbs[i].RamIO) { |
| 767 | byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); |
| 768 | } |
| 769 | } |
| 770 | break; |
| 771 | case 3: |
| 772 | pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; |
| 773 | writeb(adgl->tic_des_from_pc, pmem); |
| 774 | break; |
| 775 | case 4: |
| 776 | pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; |
| 777 | adgl->tic_owner_to_pc = readb(pmem++); |
| 778 | adgl->numcard_owner_to_pc = readb(pmem); |
| 779 | if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) |
| 780 | ret = -EFAULT; |
| 781 | break; |
| 782 | case 5: |
| 783 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); |
| 784 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); |
| 785 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); |
| 786 | writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
| 787 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
| 788 | break; |
| 789 | case 6: |
| 790 | printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); |
| 791 | printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); |
| 792 | printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); |
| 793 | printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); |
| 794 | for (i = 0; i < MAX_BOARD; i++) { |
| 795 | int serial; |
| 796 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; |
| 797 | |
| 798 | if (!apbs[i].RamIO) |
| 799 | continue; |
| 800 | |
| 801 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) |
| 802 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); |
| 803 | boardname[serial] = 0; |
| 804 | |
| 805 | printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", |
| 806 | i+1, |
| 807 | (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), |
| 808 | (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), |
| 809 | boardname); |
| 810 | |
| 811 | |
| 812 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + |
| 813 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + |
| 814 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); |
| 815 | |
| 816 | if (serial != 0) |
| 817 | printk(" S/N %d\n", serial); |
| 818 | else |
| 819 | printk("\n"); |
| 820 | } |
| 821 | if (DeviceErrorCount != 0) |
| 822 | printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); |
| 823 | if (ReadErrorCount != 0) |
| 824 | printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); |
| 825 | if (WriteErrorCount != 0) |
| 826 | printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); |
| 827 | if (waitqueue_active(&FlagSleepRec)) |
| 828 | printk(KERN_INFO "Process in read pending\n"); |
| 829 | for (i = 0; i < MAX_BOARD; i++) { |
| 830 | if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) |
| 831 | printk(KERN_INFO "Process in write pending board %d\n",i+1); |
| 832 | } |
| 833 | break; |
| 834 | default: |
| 835 | ret = -ENOTTY; |
| 836 | break; |
| 837 | } |
| 838 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
| 839 | kfree(adgl); |
| 840 | return 0; |
| 841 | } |
| 842 | |