lincan/src/tscan1.c

   1 /* tscan1.c
   2  * Linux CAN-bus device driver.
   3  * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
   4  * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
   5  * email:pisa@cmp.felk.cvut.cz
   6  * This software is released under the GPL-License.
   7  * Version lincan-0.3  17 Jun 2004
   8  *
   9  * The support for TS-CAN1 and TS-7KV provided by Ronald Gomes
  10  * from Technologic Systems <http://www.embeddedarm.com/>
  11  */
  12
  13 #include "../include/can.h"
  14 #include "../include/can_sysdep.h"
  15 #include "../include/main.h"
  16 #include "../include/pcm3680.h"
  17 #include "../include/sja1000p.h"
  18
  19 #include <linux/module.h>
  20 #include "../include/modparms.h"
  21 #include "../include/devcommon.h"
  22
  23 #include "../include/tscan1.h"
  24
  25 static CAN_DEFINE_SPINLOCK(ts7kv_win_lock);
  26
  27 long clock[MAX_HW_CARDS]={-1,-1,-1,-1,-1,-1,-1,-1};
  28 MODULE_PARM(clock, "1-" __MODULE_STRING(MAX_HW_CARDS)"i");
  29 MODULE_PARM_DESC(clock,"clock frequency for each board in step of 1kHz");
  30
  31 long tscanio[MAX_HW_CARDS]={-1,-1,-1,-1,-1,-1,-1,-1};
  32 MODULE_PARM(tscanio, "1-" __MODULE_STRING(MAX_HW_CARDS)"i");
  33 MODULE_PARM_DESC(tscanio,"TSCAN CAN controller IO address for each board");
  34
  35 #if defined(TS7XXX_IO8_BASE)&&defined(TSXXX_BASE_IO)
  36 int tsxxx_base=TS7XXX_IO8_BASE+TSXXX_BASE_IO;
  37 #elif defined(TS7XXX_IO8_BASE)
  38 int tsxxx_base=TS7XXX_IO8_BASE;
  39 #else /*TS7XXX_IO8_BASE*/
  40 unsigned long tsxxx_base=0;
  41 #endif /*TS7XXX_IO8_BASE*/
  42 MODULE_PARM(tsxxx_base, "1i");
  43 MODULE_PARM_DESC(tsxxx_base,"The base of the ISA/8-bit IO space for TSxxx CAN peripherals in the system");
  44
  45 unsigned short ts7kv_isused = 0x0;
  46
  47 /**
  48  * tscan1_request_io: - reserve io or memory range for can board
  49  * @candev: pointer to candevice/board which asks for io. Field @io_addr
  50  *      of @candev is used in most cases to define start of the range
  51  *
  52  * The function tscan1_request_io() is used to reserve the io-memory. If your
  53  * hardware uses a dedicated memory range as hardware control registers you
  54  * will have to add the code to reserve this memory as well.
  55  * %IO_RANGE is the io-memory range that gets reserved, please adjust according
  56  * your hardware. Example: #define IO_RANGE 0x100 for i82527 chips or
  57  * #define IO_RANGE 0x20 for sja1000 chips in basic CAN mode.
  58  * Return Value: The function returns zero on success or %-ENODEV on failure
  59  * File: src/tscan1.c
  60  */
  61 int tscan1_request_io(struct candevice_t *candev)
  62 {
  63         unsigned long can_io_addr;
  64         unsigned long remap_can_io_addr = 0;
  65         unsigned char mode;
  66         int i, j;
  67
  68
  69         if (!can_request_io_region(candev->io_addr, TSXXX_IO_RANGE, "tscan1-base")) {
  70                 CANMSG("Unable to request base IO port: 0x%lx\n", candev->io_addr);
  71                 return -ENODEV;
  72         } else {
  73                 DEBUGMSG("Registered base IO port: 0x%lx - 0x%lx\n",
  74                         candev->io_addr, candev->io_addr+TSXXX_IO_RANGE-1);
  75         }
  76
  77         can_io_addr = tscanio[candev->candev_idx];
  78
  79         if(can_io_addr && (can_io_addr != (unsigned long)-1)) {
  80                 remap_can_io_addr = tsxxx_base + can_io_addr;
  81
  82                 if (!can_request_io_region(remap_can_io_addr, TSXXX_CAN_RANGE, "tscan1-can")) {
  83                         CANMSG("Unable to request CAN IO port: 0x%lx\n", remap_can_io_addr);
  84                         can_release_io_region(candev->io_addr, TSXXX_IO_RANGE);
  85                         return -ENODEV;
  86                 } else {
  87                         DEBUGMSG("Registered CAN IO port: 0x%lx - 0x%lx\n",
  88                         remap_can_io_addr, remap_can_io_addr+TSXXX_CAN_RANGE-1);
  89                 }
  90         } else {
  91                 for(i = 0; 1; i++) {
  92
  93                         if(i>=8) {
  94                                 CANMSG("Unable find range for CAN IO port\n");
  95                                 can_release_io_region(candev->io_addr, TSXXX_IO_RANGE);
  96                                 return -ENODEV;
  97                         }
  98
  99                         can_io_addr = 0x100 + i * TSXXX_CAN_RANGE;
 100                         for (j = 0; j < MAX_HW_CARDS; j++) {
 101                                 if(tscanio[j] == can_io_addr) {
 102                                         j = -1;
 103                                         break;
 104                                 }
 105                         }
 106                         if(j<0)
 107                                 continue;
 108
 109                         remap_can_io_addr = tsxxx_base + can_io_addr;
 110
 111                         if (can_request_io_region(remap_can_io_addr, TSXXX_CAN_RANGE, "tscan1-can"))
 112                                 break;
 113                 }
 114
 115                 tscanio[candev->candev_idx] = can_io_addr;
 116
 117                 DEBUGMSG("Found free range and registered CAN IO port: 0x%lx - 0x%lx\n",
 118                         remap_can_io_addr, remap_can_io_addr+TSXXX_CAN_RANGE-1);
 119         }
 120
 121         candev->chip[0]->chip_base_addr = remap_can_io_addr;
 122         candev->chip[0]->msgobj[0]->obj_base_addr = remap_can_io_addr;
 123
 124         switch(can_io_addr) {
 125                 case 0x100:     mode=0x60; break;
 126                 case 0x120:     mode=0x61; break;
 127                 case 0x180:     mode=0x62; break;
 128                 case 0x1A0:     mode=0x63; break;
 129                 case 0x200:     mode=0x64; break;
 130                 case 0x240:     mode=0x65; break;
 131                 case 0x280:     mode=0x66; break;
 132                 case 0x320:     mode=0x67; break;
 133                 default:        mode=0x60; break;
 134         }
 135
 136         outb(0x00, candev->io_addr+TSCAN1_WIN_REG);
 137         outb(mode, candev->io_addr+TSCAN1_MOD_REG);
 138
 139         return 0;
 140 }
 141
 142 int ts7kv_request_io(struct candevice_t *candev)
 143 {
 144         if (!can_request_io_region(candev->io_addr, TSXXX_CAN_RANGE, "ts7kv-can")) {
 145                 CANMSG("Unable to request CAN IO port: 0x%lx\n", candev->io_addr);
 146                 return -ENODEV;
 147         } else {
 148                 DEBUGMSG("Registered CAN IO port: 0x%lx - 0x%lx\n",
 149                         candev->io_addr, candev->io_addr+TSXXX_CAN_RANGE-1);
 150         }
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * tscan1_release_io - free reserved io memory range
 157  * @candev: pointer to candevice/board which releases io
 158  *
 159  * The function tscan1_release_io() is used to free reserved io-memory.
 160  * In case you have reserved more io memory, don't forget to free it here.
 161  * IO_RANGE is the io-memory range that gets released, please adjust according
 162  * your hardware. Example: #define IO_RANGE 0x100 for i82527 chips or
 163  * #define IO_RANGE 0x20 for sja1000 chips in basic CAN mode.
 164  * Return Value: The function always returns zero
 165  * File: src/tscan1.c
 166  */
 167 int tscan1_release_io(struct candevice_t *candev)
 168 {
 169         unsigned long remap_can_io_addr;
 170
 171         if(candev->chip[0]){
 172                 remap_can_io_addr = candev->chip[0]->chip_base_addr;
 173                 if(remap_can_io_addr != (unsigned long)-1)
 174                         can_release_io_region(remap_can_io_addr, TSXXX_CAN_RANGE);
 175         }
 176
 177         outb(0x20, candev->io_addr+TSCAN1_MOD_REG);
 178
 179         can_release_io_region(candev->io_addr, TSXXX_IO_RANGE);
 180         return 0;
 181 }
 182
 183 int ts7kv_release_io(struct candevice_t *candev)
 184 {
 185         can_release_io_region(candev->io_addr, TSXXX_CAN_RANGE);
 186         return 0;
 187 }
 188
 189 /**
 190  * tscan1_reset - hardware reset routine
 191  * @candev: Pointer to candevice/board structure
 192  *
 193  * The function tscan1_reset() is used to give a hardware reset. This is
 194  * rather hardware specific so I haven't included example code. Don't forget to
 195  * check the reset status of the chip before returning.
 196  * Return Value: The function returns zero on success or %-ENODEV on failure
 197  * File: src/tscan1.c
 198  */
 199 int tscan1_reset(struct candevice_t *candev)
 200 {
 201         unsigned short i=0, chipnr;
 202         struct canchip_t *chip;
 203
 204         DEBUGMSG("Resetting %s hardware ...\n", candev->hwname);
 205
 206         for(chipnr=0;chipnr<candev->nr_sja1000_chips;chipnr++) {
 207                 chip=candev->chip[chipnr];
 208                 can_write_reg(chip, sjaMOD_RM, SJAMOD);
 209                 udelay(1000);
 210                 can_write_reg(chip, 0x00, SJAIER);
 211                 udelay(1000);
 212                 i=20;
 213                 while (can_read_reg(chip, SJAMOD)&sjaMOD_RM){
 214                         if(!i--) return -ENODEV;
 215                         udelay(1000);
 216                         can_write_reg(chip, 0, SJAMOD);
 217                 }
 218                 udelay(1000);
 219                 can_write_reg(chip, sjaCDR_PELICAN, SJACDR);
 220                 can_write_reg(chip, 0x00, SJAIER);
 221         }
 222
 223         return 0;
 224 }
 225
 226 #define RESET_ADDR 0x100
 227 #define NR_82527 0
 228 #define NR_SJA1000 1
 229
 230 int tscan1_check_presence(unsigned long remap_io_addr, int *pjmp)
 231 {
 232         int result = -ENODEV;
 233
 234         if (!can_request_io_region(remap_io_addr, TSXXX_IO_RANGE, "tscan1-probe"))
 235                 return -ENODEV;
 236
 237         do {
 238                 if (inb(remap_io_addr+TSXXX_ID0_REG)!=TSCAN1_ID0 ||
 239                         inb(remap_io_addr+TSXXX_ID1_REG)!=TSCAN1_ID1)
 240                         break;
 241
 242                 outb(0x00, remap_io_addr+TSCAN1_WIN_REG);
 243                 outb(0x20, remap_io_addr+TSCAN1_MOD_REG);
 244
 245                 if(pjmp)
 246                         *pjmp = inb(remap_io_addr+TSCAN1_JMP_REG);
 247
 248                 result = 0;
 249         } while (0);
 250
 251         can_release_io_region(remap_io_addr, TSXXX_IO_RANGE);
 252
 253         return result;
 254 }
 255
 256
 257 /**
 258  * tscan1_init_hw_data - Initialize hardware cards
 259  * @candev: Pointer to candevice/board structure
 260  *
 261  * The function tscan1_init_hw_data() is used to initialize the hardware
 262  * structure containing information about the installed CAN-board.
 263  * %RESET_ADDR represents the io-address of the hardware reset register.
 264  * %NR_82527 represents the number of intel 82527 chips on the board.
 265  * %NR_SJA1000 represents the number of philips sja1000 chips on the board.
 266  * The flags entry can currently only be %CANDEV_PROGRAMMABLE_IRQ to indicate that
 267  * the hardware uses programmable interrupts.
 268  * Return Value: The function always returns zero
 269  * File: src/tscan1.c
 270  */
 271
 272 int tscan1_init_hw_data(struct candevice_t *candev)
 273 {
 274         int i, j, jmp;
 275         unsigned long io_addr;
 276         unsigned long remap_io_addr;
 277
 278         io_addr = candev->io_addr;
 279
 280         if(io_addr && (io_addr != (unsigned long)-1)) {
 281                 remap_io_addr = io_addr = tsxxx_base;
 282
 283                 if(tscan1_check_presence(remap_io_addr, &jmp)){
 284                         CANMSG("No TSCAN1 card found at address 0xlx\n");
 285                         return -ENODEV;
 286                 }
 287         } else {
 288                 DEBUGMSG("Scanning bus for TS-CAN1 boards...\n");
 289
 290                 for (i=0; 1;i++)
 291                 {
 292                         if(i >= 4) {
 293                                 CANMSG("No TS-CAN1 boards found for slot %d\n", candev->candev_idx);
 294                                 return -ENODEV;
 295                         }
 296
 297                         io_addr = TSCAN1_BASE_IO + i*TSXXX_IO_RANGE;
 298                         remap_io_addr = io_addr = tsxxx_base;
 299
 300                         for (j = 0; j < MAX_HW_CARDS; j++) {
 301                                 if(io[j] == io_addr){
 302                                         j = -1;
 303                                         break;
 304                                 }
 305                         }
 306                         if(j<0)
 307                                 continue;
 308
 309                         if(!tscan1_check_presence(remap_io_addr, &jmp))
 310                                 break;
 311
 312                 }
 313                 DEBUGMSG("TS-CAN1 board was found at 0x%lx for driver slot %d\n",
 314                                         io_addr, candev->candev_idx);
 315
 316                 io[candev->candev_idx] = io_addr;
 317         }
 318
 319         candev->io_addr = remap_io_addr;
 320         /* unused reset address is used to store jumper setting */
 321         candev->res_addr = jmp;
 322
 323         candev->nr_82527_chips=NR_82527;
 324         candev->nr_sja1000_chips=NR_SJA1000;
 325         candev->nr_all_chips=NR_82527+NR_SJA1000;
 326         candev->flags &= ~CANDEV_PROGRAMMABLE_IRQ;
 327
 328         DEBUGMSG("Memory region at 0x%lx assigned to sja1000 of driver %d/%s\n",
 329                 candev->io_addr, candev->candev_idx, candev->hwname);
 330
 331         return 0;
 332 }
 333
 334
 335 int ts7kv_check_presence(unsigned long remap_io_addr, int *pjmp)
 336 {
 337         int result = -ENODEV;
 338
 339         if (!can_request_io_region(remap_io_addr, TSXXX_IO_RANGE, "ts7kv-probe"))
 340                 return -ENODEV;
 341
 342         do {
 343                 if (inb(remap_io_addr+TSXXX_ID0_REG)!=TS7KV_ID0 ||
 344                         inb(remap_io_addr+TSXXX_ID1_REG)!=TS7KV_ID1)
 345                         break;
 346
 347                 if(pjmp)
 348                         *pjmp = inb(remap_io_addr+TS7KV_JMP_REG);
 349
 350                 result = 0;
 351         } while (0);
 352
 353         can_release_io_region(remap_io_addr, TSXXX_IO_RANGE);
 354
 355         return result;
 356 }
 357
 358 int ts7kv_init_hw_data(struct candevice_t *candev)
 359 {
 360         int i, j, jmp;
 361         unsigned long io_addr;
 362         unsigned long remap_io_addr;
 363         unsigned long can_io_addr;
 364
 365         io_addr = candev->io_addr;
 366
 367         if(io_addr && (io_addr != (unsigned long)-1)) {
 368                 remap_io_addr = io_addr = tsxxx_base;
 369
 370                 if(ts7kv_check_presence(remap_io_addr, &jmp)){
 371                         CANMSG("No TS7KV card found at address 0xlx\n");
 372                         return -ENODEV;
 373                 }
 374         } else {
 375                 DEBUGMSG("Scanning bus for TS7KV boards...\n");
 376
 377                 for (i=0; 1;i++)
 378                 {
 379                         if(i >= 4) {
 380                                 CANMSG("No TS7KV boards found for slot %d\n", candev->candev_idx);
 381                                 return -ENODEV;
 382                         }
 383
 384                         io_addr = TS7KV_BASE_IO + i*TSXXX_IO_RANGE;
 385                         remap_io_addr = io_addr = tsxxx_base;
 386
 387                         for (j = 0; j < MAX_HW_CARDS; j++) {
 388                                 if(io[j] == io_addr){
 389                                         j = -1;
 390                                         break;
 391                                 }
 392                         }
 393                         if(j<0)
 394                                 continue;
 395
 396                         if(!ts7kv_check_presence(remap_io_addr, &jmp))
 397                                 break;
 398
 399                 }
 400                 DEBUGMSG("TS7KV board was found at 0x%lx for driver slot %d\n",
 401                                         io_addr, candev->candev_idx);
 402
 403                 io[candev->candev_idx] = io_addr;
 404         }
 405
 406         can_io_addr = ((io_addr>>3)&0x03)*0x20;
 407         tscanio[candev->candev_idx] = can_io_addr;
 408
 409         /* dev_base_addr address is used to store remapped PLD base address */
 410         candev->dev_base_addr = remap_io_addr;
 411
 412         /* dev_base_addr address is used to store remapped slave window address */
 413         candev->io_addr = can_io_addr+tsxxx_base;
 414
 415         /* unused reset address is used to store jumper setting */
 416         candev->res_addr = jmp;
 417
 418         candev->nr_82527_chips=NR_82527;
 419         candev->nr_sja1000_chips=NR_SJA1000;
 420         candev->nr_all_chips=NR_82527+NR_SJA1000;
 421         candev->flags &= ~CANDEV_PROGRAMMABLE_IRQ;
 422
 423         DEBUGMSG("Memory region at 0x%lx assigned to sja1000 of driver %d/%s\n",
 424                 candev->io_addr, candev->candev_idx, candev->hwname);
 425
 426         return 0;
 427 }
 428
 429 /**
 430  * tscan1_init_chip_data - Initialize chips
 431  * @candev: Pointer to candevice/board structure
 432  * @chipnr: Number of the CAN chip on the hardware card
 433  *
 434  * The function tscan1_init_chip_data() is used to initialize the hardware
 435  * structure containing information about the CAN chips.
 436  * %CHIP_TYPE represents the type of CAN chip. %CHIP_TYPE can be "i82527" or
 437  * "sja1000".
 438  * The @chip_base_addr entry represents the start of the 'official' memory map
 439  * of the installed chip. It's likely that this is the same as the @io_addr
 440  * argument supplied at module loading time.
 441  * The @clock entry holds the chip clock value in Hz.
 442  * The entry @sja_cdr_reg holds hardware specific options for the Clock Divider
 443  * register. Options defined in the %sja1000.h file:
 444  * %sjaCDR_CLKOUT_MASK, %sjaCDR_CLK_OFF, %sjaCDR_RXINPEN, %sjaCDR_CBP, %sjaCDR_PELICAN
 445  * The entry @sja_ocr_reg holds hardware specific options for the Output Control
 446  * register. Options defined in the %sja1000.h file:
 447  * %sjaOCR_MODE_BIPHASE, %sjaOCR_MODE_TEST, %sjaOCR_MODE_NORMAL, %sjaOCR_MODE_CLOCK,
 448  * %sjaOCR_TX0_LH, %sjaOCR_TX1_ZZ.
 449  * The entry @int_clk_reg holds hardware specific options for the Clock Out
 450  * register. Options defined in the %i82527.h file:
 451  * %iCLK_CD0, %iCLK_CD1, %iCLK_CD2, %iCLK_CD3, %iCLK_SL0, %iCLK_SL1.
 452  * The entry @int_bus_reg holds hardware specific options for the Bus
 453  * Configuration register. Options defined in the %i82527.h file:
 454  * %iBUS_DR0, %iBUS_DR1, %iBUS_DT1, %iBUS_POL, %iBUS_CBY.
 455  * Return Value: The function always returns zero
 456  * File: src/tscan1.c
 457  */
 458 int tscan1_init_chip_data(struct candevice_t *candev, int chipnr)
 459 {
 460         unsigned long clk;
 461         int jmp;
 462         int irq = -1;
 463
 464         clk = clock[candev->candev_idx];
 465         if(!clk || (clk == -1))
 466                 clk = 16000 * 1000;
 467         else
 468                 clk *= 1000;
 469
 470         /* unused reset address is used to store jumper setting */
 471         jmp = candev->res_addr;
 472
 473         if (jmp&0x10 && jmp&0x20) irq=TSXXX_IRQ5;
 474         else if (jmp&0x10) irq=TSXXX_IRQ6;
 475         else if (jmp&0x20) irq=TSXXX_IRQ7;
 476
 477         if(irq<0) {
 478                 CANMSG("Jumpers select no IRQ for TSCAN1 at 0x%lx of driver %d/%s\n",
 479                         candev->io_addr, candev->candev_idx, candev->hwname);
 480                 return -ENODEV;
 481         }
 482         candev->chip[chipnr]->chip_irq = irq;
 483
 484         sja1000p_fill_chipspecops(candev->chip[chipnr]);
 485
 486         candev->chip[chipnr]->clock = clk;
 487         candev->chip[chipnr]->int_clk_reg = 0x0;
 488         candev->chip[chipnr]->int_bus_reg = 0x0;
 489         candev->chip[chipnr]->sja_cdr_reg = sjaCDR_CBP | sjaCDR_CLK_OFF;
 490         candev->chip[chipnr]->sja_ocr_reg = sjaOCR_MODE_NORMAL | sjaOCR_TX0_LH;
 491         /*
 492          * The address is assigned during tscan1_request_io()
 493          * according to found free ranges or tscanio option
 494          */
 495         candev->chip[chipnr]->chip_base_addr = (unsigned long)-1;
 496
 497         return 0;
 498 }
 499
 500 int ts7kv_init_chip_data(struct candevice_t *candev, int chipnr)
 501 {
 502         unsigned long clk;
 503         int jmp;
 504         int irq = -1;
 505
 506         clk = clock[candev->candev_idx];
 507         if(!clk || (clk == -1))
 508                 clk = 24000 * 1000;
 509         else
 510                 clk *= 1000;
 511
 512         /* unused reset address is used to store jumper setting */
 513         jmp = candev->res_addr;
 514
 515         if (jmp&0x10 && jmp&0x20) irq=TSXXX_IRQ5;
 516         else if (jmp&0x10) irq=TSXXX_IRQ6;
 517         else if (jmp&0x20) irq=TSXXX_IRQ7;
 518
 519         if(irq<0) {
 520                 CANMSG("Jumpers select no IRQ for TS7KV CAN at 0x%lx of driver %d/%s\n",
 521                         candev->io_addr, candev->candev_idx, candev->hwname);
 522                 return -ENODEV;
 523         }
 524
 525         candev->chip[chipnr]->chip_irq = irq;
 526
 527         sja1000p_fill_chipspecops(candev->chip[chipnr]);
 528
 529         candev->chip[chipnr]->clock = clk;
 530         candev->chip[chipnr]->int_clk_reg = 0x0;
 531         candev->chip[chipnr]->int_bus_reg = 0x0;
 532         candev->chip[chipnr]->sja_cdr_reg = sjaCDR_CBP | sjaCDR_CLK_OFF;
 533         candev->chip[chipnr]->sja_ocr_reg = sjaOCR_MODE_NORMAL | sjaOCR_TX0_LH;
 534         candev->chip[chipnr]->chip_base_addr = candev->io_addr;
 535
 536         return 0;
 537 }
 538
 539 /**
 540  * tscan1_init_obj_data - Initialize message buffers
 541  * @chip: Pointer to chip specific structure
 542  * @objnr: Number of the message buffer
 543  *
 544  * The function tscan1_init_obj_data() is used to initialize the hardware
 545  * structure containing information about the different message objects on the
 546  * CAN chip. In case of the sja1000 there's only one message object but on the
 547  * i82527 chip there are 15.
 548  * The code below is for a i82527 chip and initializes the object base addresses
 549  * The entry @obj_base_addr represents the first memory address of the message
 550  * object. In case of the sja1000 @obj_base_addr is taken the same as the chips
 551  * base address.
 552  * Unless the hardware uses a segmented memory map, flags can be set zero.
 553  * Return Value: The function always returns zero
 554  * File: src/tscan1.c
 555  */
 556 int tscan1_init_obj_data(struct canchip_t *chip, int objnr)
 557 {
 558         chip->msgobj[objnr]->obj_base_addr = chip->chip_base_addr;
 559         return 0;
 560 }
 561
 562 /**
 563  * tscan1_program_irq - program interrupts
 564  * @candev: Pointer to candevice/board structure
 565  *
 566  * The function tscan1_program_irq() is used for hardware that uses
 567  * programmable interrupts. If your hardware doesn't use programmable interrupts
 568  * you should not set the @candevices_t->flags entry to %CANDEV_PROGRAMMABLE_IRQ and
 569  * leave this function unedited. Again this function is hardware specific so
 570  * there's no example code.
 571  * Return value: The function returns zero on success or %-ENODEV on failure
 572  * File: src/tscan1.c
 573  */
 574 int tscan1_program_irq(struct candevice_t *candev)
 575 {
 576         return 0;
 577 }
 578
 579 /**
 580  * tscan1_write_register - Low level write register routine
 581  * @data: data to be written
 582  * @address: memory address to write to
 583  *
 584  * The function tscan1_write_register() is used to write to hardware registers
 585  * on the CAN chip. You should only have to edit this function if your hardware
 586  * uses some specific write process.
 587  * Return Value: The function does not return a value
 588  * File: src/tscan1.c
 589  */
 590 void tscan1_write_register(unsigned data, unsigned long address)
 591 {
 592         outb(data, address);
 593 }
 594
 595 void ts7kv_write_register(unsigned data, unsigned long address)
 596 {
 597         unsigned long base = address & ~0x1f;
 598         unsigned char nwin = 0x10;
 599         unsigned char savewin;
 600
 601         can_spin_irqflags_t flags;
 602
 603         if((address&0x1f) > 0x1d) {
 604                 nwin++;
 605                 address -= 0x10;
 606         }
 607
 608         can_spin_lock_irqsave(&ts7kv_win_lock,flags);
 609         savewin = inb(base+TS7KV_WIN_REG);
 610         if(nwin == savewin) {
 611                 outb(data, address);
 612         }else{
 613                 outb(nwin, base+TS7KV_WIN_REG);
 614                 outb(data, address);
 615                 outb(savewin, base+TS7KV_WIN_REG);
 616         }
 617         can_spin_unlock_irqrestore(&ts7kv_win_lock,flags);
 618 }
 619
 620 /**
 621  * tscan1_read_register - Low level read register routine
 622  * @address: memory address to read from
 623  *
 624  * The function tscan1_read_register() is used to read from hardware registers
 625  * on the CAN chip. You should only have to edit this function if your hardware
 626  * uses some specific read process.
 627  * Return Value: The function returns the value stored in @address
 628  * File: src/tscan1.c
 629  */
 630 unsigned tscan1_read_register(unsigned long address)
 631 {
 632         return inb(address);
 633 }
 634
 635 unsigned ts7kv_read_register(unsigned long address)
 636 {
 637         unsigned long base = address & ~0x1f;
 638         unsigned char nwin = 0x10;
 639         unsigned char savewin;
 640         unsigned val;
 641
 642         can_spin_irqflags_t flags;
 643
 644         if((address&0x1f) > 0x1d) {
 645                 nwin++;
 646                 address -= 0x10;
 647         }
 648
 649         can_spin_lock_irqsave(&ts7kv_win_lock,flags);
 650         savewin = inb(base+TS7KV_WIN_REG);
 651         if(nwin == savewin) {
 652                 val = inb(address);
 653         }else{
 654                 outb(nwin, base+TS7KV_WIN_REG);
 655                 val = inb(address);
 656                 outb(savewin, base+TS7KV_WIN_REG);
 657         }
 658         can_spin_unlock_irqrestore(&ts7kv_win_lock,flags);
 659
 660         return val;
 661 }
 662
 663 int tscan1_register(struct hwspecops_t *hwspecops)
 664 {
 665         hwspecops->request_io = tscan1_request_io;
 666         hwspecops->release_io = tscan1_release_io;
 667         hwspecops->reset = tscan1_reset;
 668         hwspecops->init_hw_data = tscan1_init_hw_data;
 669         hwspecops->init_chip_data = tscan1_init_chip_data;
 670         hwspecops->init_obj_data = tscan1_init_obj_data;
 671         hwspecops->write_register = tscan1_write_register;
 672         hwspecops->read_register = tscan1_read_register;
 673         hwspecops->program_irq = tscan1_program_irq;
 674         return 0;
 675 }
 676
 677 extern int ts7kv_register(struct hwspecops_t *hwspecops)
 678 {
 679         hwspecops->request_io = ts7kv_request_io;
 680         hwspecops->release_io = ts7kv_release_io;
 681         hwspecops->reset = tscan1_reset;
 682         hwspecops->init_hw_data = ts7kv_init_hw_data;
 683         hwspecops->init_chip_data = ts7kv_init_chip_data;
 684         hwspecops->init_obj_data = tscan1_init_obj_data;
 685         hwspecops->write_register = ts7kv_write_register;
 686         hwspecops->read_register = ts7kv_read_register;
 687         hwspecops->program_irq = tscan1_program_irq;
 688         return 0;
 689 }