arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_irq.c

   1 /*
   2  * linux/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_irq.c
   3  *
   4  * Toshiba RBTX4927 specific interrupt handlers
   5  *
   6  * Author: MontaVista Software, Inc.
   7  *         source@mvista.com
   8  *
   9  * Copyright 2001-2002 MontaVista Software Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  21  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  22  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  24  *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  25  *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  *  You should have received a copy of the GNU General Public License along
  28  *  with this program; if not, write to the Free Software Foundation, Inc.,
  29  *  675 Mass Ave, Cambridge, MA 02139, USA.
  30  */
  31
  32
  33 /*
  34 IRQ  Device
  35 00   RBTX4927-ISA/00
  36 01   RBTX4927-ISA/01 PS2/Keyboard
  37 02   RBTX4927-ISA/02 Cascade RBTX4927-ISA (irqs 8-15)
  38 03   RBTX4927-ISA/03
  39 04   RBTX4927-ISA/04
  40 05   RBTX4927-ISA/05
  41 06   RBTX4927-ISA/06
  42 07   RBTX4927-ISA/07
  43 08   RBTX4927-ISA/08
  44 09   RBTX4927-ISA/09
  45 10   RBTX4927-ISA/10
  46 11   RBTX4927-ISA/11
  47 12   RBTX4927-ISA/12 PS2/Mouse (not supported at this time)
  48 13   RBTX4927-ISA/13
  49 14   RBTX4927-ISA/14 IDE
  50 15   RBTX4927-ISA/15
  51
  52 16   TX4927-CP0/00 Software 0
  53 17   TX4927-CP0/01 Software 1
  54 18   TX4927-CP0/02 Cascade TX4927-CP0
  55 19   TX4927-CP0/03 Multiplexed -- do not use
  56 20   TX4927-CP0/04 Multiplexed -- do not use
  57 21   TX4927-CP0/05 Multiplexed -- do not use
  58 22   TX4927-CP0/06 Multiplexed -- do not use
  59 23   TX4927-CP0/07 CPU TIMER
  60
  61 24   TX4927-PIC/00
  62 25   TX4927-PIC/01
  63 26   TX4927-PIC/02
  64 27   TX4927-PIC/03 Cascade RBTX4927-IOC
  65 28   TX4927-PIC/04
  66 29   TX4927-PIC/05 RBTX4927 RTL-8019AS ethernet
  67 30   TX4927-PIC/06
  68 31   TX4927-PIC/07
  69 32   TX4927-PIC/08 TX4927 SerialIO Channel 0
  70 33   TX4927-PIC/09 TX4927 SerialIO Channel 1
  71 34   TX4927-PIC/10
  72 35   TX4927-PIC/11
  73 36   TX4927-PIC/12
  74 37   TX4927-PIC/13
  75 38   TX4927-PIC/14
  76 39   TX4927-PIC/15
  77 40   TX4927-PIC/16 TX4927 PCI PCI-C
  78 41   TX4927-PIC/17
  79 42   TX4927-PIC/18
  80 43   TX4927-PIC/19
  81 44   TX4927-PIC/20
  82 45   TX4927-PIC/21
  83 46   TX4927-PIC/22 TX4927 PCI PCI-ERR
  84 47   TX4927-PIC/23 TX4927 PCI PCI-PMA (not used)
  85 48   TX4927-PIC/24
  86 49   TX4927-PIC/25
  87 50   TX4927-PIC/26
  88 51   TX4927-PIC/27
  89 52   TX4927-PIC/28
  90 53   TX4927-PIC/29
  91 54   TX4927-PIC/30
  92 55   TX4927-PIC/31
  93
  94 56 RBTX4927-IOC/00 FPCIB0 PCI-D PJ4/A PJ5/B SB/C PJ6/D PJ7/A (SouthBridge/NotUsed)        [RTL-8139=PJ4]
  95 57 RBTX4927-IOC/01 FPCIB0 PCI-C PJ4/D PJ5/A SB/B PJ6/C PJ7/D (SouthBridge/NotUsed)        [RTL-8139=PJ5]
  96 58 RBTX4927-IOC/02 FPCIB0 PCI-B PJ4/C PJ5/D SB/A PJ6/B PJ7/C (SouthBridge/IDE/pin=1,INTR) [RTL-8139=NotSupported]
  97 59 RBTX4927-IOC/03 FPCIB0 PCI-A PJ4/B PJ5/C SB/D PJ6/A PJ7/B (SouthBridge/USB/pin=4)      [RTL-8139=PJ6]
  98 60 RBTX4927-IOC/04
  99 61 RBTX4927-IOC/05
 100 62 RBTX4927-IOC/06
 101 63 RBTX4927-IOC/07
 102
 103 NOTES:
 104 SouthBridge/INTR is mapped to SouthBridge/A=PCI-B/#58
 105 SouthBridge/ISA/pin=0 no pci irq used by this device
 106 SouthBridge/IDE/pin=1 no pci irq used by this device, using INTR via ISA IRQ14
 107 SouthBridge/USB/pin=4 using pci irq SouthBridge/D=PCI-A=#59
 108 SouthBridge/PMC/pin=0 no pci irq used by this device
 109 SuperIO/PS2/Keyboard, using INTR via ISA IRQ1
 110 SuperIO/PS2/Mouse, using INTR via ISA IRQ12 (mouse not currently supported)
 111 JP7 is not bus master -- do NOT use -- only 4 pci bus master's allowed -- SouthBridge, JP4, JP5, JP6
 112 */
 113
 114 #include <linux/init.h>
 115 #include <linux/kernel.h>
 116 #include <linux/types.h>
 117 #include <linux/mm.h>
 118 #include <linux/swap.h>
 119 #include <linux/ioport.h>
 120 #include <linux/sched.h>
 121 #include <linux/interrupt.h>
 122 #include <linux/pci.h>
 123 #include <linux/timex.h>
 124 #include <asm/bootinfo.h>
 125 #include <asm/page.h>
 126 #include <asm/io.h>
 127 #include <asm/irq.h>
 128 #include <asm/pci.h>
 129 #include <asm/processor.h>
 130 #include <asm/reboot.h>
 131 #include <asm/time.h>
 132 #include <asm/wbflush.h>
 133 #include <linux/bootmem.h>
 134 #include <linux/blkdev.h>
 135 #ifdef CONFIG_RTC_DS1742
 136 #include <linux/ds1742rtc.h>
 137 #endif
 138 #ifdef CONFIG_TOSHIBA_FPCIB0
 139 #include <asm/tx4927/smsc_fdc37m81x.h>
 140 #endif
 141 #include <asm/tx4927/toshiba_rbtx4927.h>
 142
 143
 144 #undef TOSHIBA_RBTX4927_IRQ_DEBUG
 145
 146 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 147 #define TOSHIBA_RBTX4927_IRQ_NONE        0x00000000
 148
 149 #define TOSHIBA_RBTX4927_IRQ_INFO          ( 1 <<  0 )
 150 #define TOSHIBA_RBTX4927_IRQ_WARN          ( 1 <<  1 )
 151 #define TOSHIBA_RBTX4927_IRQ_EROR          ( 1 <<  2 )
 152
 153 #define TOSHIBA_RBTX4927_IRQ_IOC_INIT      ( 1 << 10 )
 154 #define TOSHIBA_RBTX4927_IRQ_IOC_ENABLE    ( 1 << 13 )
 155 #define TOSHIBA_RBTX4927_IRQ_IOC_DISABLE   ( 1 << 14 )
 156
 157 #define TOSHIBA_RBTX4927_IRQ_ISA_INIT      ( 1 << 20 )
 158 #define TOSHIBA_RBTX4927_IRQ_ISA_ENABLE    ( 1 << 23 )
 159 #define TOSHIBA_RBTX4927_IRQ_ISA_DISABLE   ( 1 << 24 )
 160 #define TOSHIBA_RBTX4927_IRQ_ISA_MASK      ( 1 << 25 )
 161
 162 #define TOSHIBA_RBTX4927_SETUP_ALL         0xffffffff
 163 #endif
 164
 165
 166 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 167 static const u32 toshiba_rbtx4927_irq_debug_flag =
 168     (TOSHIBA_RBTX4927_IRQ_NONE | TOSHIBA_RBTX4927_IRQ_INFO |
 169      TOSHIBA_RBTX4927_IRQ_WARN | TOSHIBA_RBTX4927_IRQ_EROR
 170 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_INIT
 171 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_ENABLE
 172 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_DISABLE
 173 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_INIT
 174 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_ENABLE
 175 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_DISABLE
 176 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_MASK
 177     );
 178 #endif
 179
 180
 181 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 182 #define TOSHIBA_RBTX4927_IRQ_DPRINTK(flag,str...) \
 183         if ( (toshiba_rbtx4927_irq_debug_flag) & (flag) ) \
 184         { \
 185            char tmp[100]; \
 186            sprintf( tmp, str ); \
 187            printk( "%s(%s:%u)::%s", __FUNCTION__, __FILE__, __LINE__, tmp ); \
 188         }
 189 #else
 190 #define TOSHIBA_RBTX4927_IRQ_DPRINTK(flag,str...)
 191 #endif
 192
 193
 194
 195
 196 #define TOSHIBA_RBTX4927_IRQ_IOC_RAW_BEG   0
 197 #define TOSHIBA_RBTX4927_IRQ_IOC_RAW_END   7
 198
 199 #define TOSHIBA_RBTX4927_IRQ_IOC_BEG  ((TX4927_IRQ_PIC_END+1)+TOSHIBA_RBTX4927_IRQ_IOC_RAW_BEG) /* 56 */
 200 #define TOSHIBA_RBTX4927_IRQ_IOC_END  ((TX4927_IRQ_PIC_END+1)+TOSHIBA_RBTX4927_IRQ_IOC_RAW_END) /* 63 */
 201
 202
 203 #define TOSHIBA_RBTX4927_IRQ_ISA_BEG MI8259_IRQ_ISA_BEG
 204 #define TOSHIBA_RBTX4927_IRQ_ISA_END MI8259_IRQ_ISA_END
 205 #define TOSHIBA_RBTX4927_IRQ_ISA_MID ((TOSHIBA_RBTX4927_IRQ_ISA_BEG+TOSHIBA_RBTX4927_IRQ_ISA_END+1)/2)
 206
 207
 208 #define TOSHIBA_RBTX4927_IRQ_NEST_IOC_ON_PIC TX4927_IRQ_NEST_EXT_ON_PIC
 209 #define TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_IOC (TOSHIBA_RBTX4927_IRQ_IOC_BEG+2)
 210 #define TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_ISA (TOSHIBA_RBTX4927_IRQ_ISA_BEG+2)
 211
 212 extern int tx4927_using_backplane;
 213
 214 #ifdef CONFIG_TOSHIBA_FPCIB0
 215 extern void enable_8259A_irq(unsigned int irq);
 216 extern void disable_8259A_irq(unsigned int irq);
 217 extern void mask_and_ack_8259A(unsigned int irq);
 218 #endif
 219
 220 static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq);
 221 static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq);
 222
 223 #ifdef CONFIG_TOSHIBA_FPCIB0
 224 static void toshiba_rbtx4927_irq_isa_enable(unsigned int irq);
 225 static void toshiba_rbtx4927_irq_isa_disable(unsigned int irq);
 226 static void toshiba_rbtx4927_irq_isa_mask_and_ack(unsigned int irq);
 227 #endif
 228
 229 #define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC"
 230 static struct irq_chip toshiba_rbtx4927_irq_ioc_type = {
 231         .typename = TOSHIBA_RBTX4927_IOC_NAME,
 232         .ack = toshiba_rbtx4927_irq_ioc_disable,
 233         .mask = toshiba_rbtx4927_irq_ioc_disable,
 234         .mask_ack = toshiba_rbtx4927_irq_ioc_disable,
 235         .unmask = toshiba_rbtx4927_irq_ioc_enable,
 236 };
 237 #define TOSHIBA_RBTX4927_IOC_INTR_ENAB 0xbc002000
 238 #define TOSHIBA_RBTX4927_IOC_INTR_STAT 0xbc002006
 239
 240
 241 #ifdef CONFIG_TOSHIBA_FPCIB0
 242 #define TOSHIBA_RBTX4927_ISA_NAME "RBTX4927-ISA"
 243 static struct irq_chip toshiba_rbtx4927_irq_isa_type = {
 244         .typename = TOSHIBA_RBTX4927_ISA_NAME,
 245         .ack = toshiba_rbtx4927_irq_isa_mask_and_ack,
 246         .mask = toshiba_rbtx4927_irq_isa_disable,
 247         .mask_ack = toshiba_rbtx4927_irq_isa_mask_and_ack,
 248         .unmask = toshiba_rbtx4927_irq_isa_enable,
 249 };
 250 #endif
 251
 252
 253 u32 bit2num(u32 num)
 254 {
 255         u32 i;
 256
 257         for (i = 0; i < (sizeof(num) * 8); i++) {
 258                 if (num & (1 << i)) {
 259                         return (i);
 260                 }
 261         }
 262         return (0);
 263 }
 264
 265 int toshiba_rbtx4927_irq_nested(int sw_irq)
 266 {
 267         u32 level3;
 268         u32 level4;
 269         u32 level5;
 270
 271         level3 = reg_rd08(TOSHIBA_RBTX4927_IOC_INTR_STAT) & 0x1f;
 272         if (level3) {
 273                 sw_irq = TOSHIBA_RBTX4927_IRQ_IOC_BEG + bit2num(level3);
 274                 if (sw_irq != TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_IOC) {
 275                         goto RETURN;
 276                 }
 277         }
 278 #ifdef CONFIG_TOSHIBA_FPCIB0
 279         {
 280                 if (tx4927_using_backplane) {
 281                         outb(0x0A, 0x20);
 282                         level4 = inb(0x20) & 0xff;
 283                         if (level4) {
 284                                 sw_irq =
 285                                     TOSHIBA_RBTX4927_IRQ_ISA_BEG +
 286                                     bit2num(level4);
 287                                 if (sw_irq !=
 288                                     TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_ISA) {
 289                                         goto RETURN;
 290                                 }
 291                         }
 292
 293                         outb(0x0A, 0xA0);
 294                         level5 = inb(0xA0) & 0xff;
 295                         if (level5) {
 296                                 sw_irq =
 297                                     TOSHIBA_RBTX4927_IRQ_ISA_MID +
 298                                     bit2num(level5);
 299                                 goto RETURN;
 300                         }
 301                 }
 302         }
 303 #endif
 304
 305       RETURN:
 306         return (sw_irq);
 307 }
 308
 309 //#define TOSHIBA_RBTX4927_PIC_ACTION(s) { no_action, 0, CPU_MASK_NONE, s, NULL, NULL }
 310 #define TOSHIBA_RBTX4927_PIC_ACTION(s) { no_action, IRQF_SHARED, CPU_MASK_NONE, s, NULL, NULL }
 311 static struct irqaction toshiba_rbtx4927_irq_ioc_action =
 312 TOSHIBA_RBTX4927_PIC_ACTION(TOSHIBA_RBTX4927_IOC_NAME);
 313 #ifdef CONFIG_TOSHIBA_FPCIB0
 314 static struct irqaction toshiba_rbtx4927_irq_isa_master =
 315 TOSHIBA_RBTX4927_PIC_ACTION(TOSHIBA_RBTX4927_ISA_NAME "/M");
 316 static struct irqaction toshiba_rbtx4927_irq_isa_slave =
 317 TOSHIBA_RBTX4927_PIC_ACTION(TOSHIBA_RBTX4927_ISA_NAME "/S");
 318 #endif
 319
 320
 321 /**********************************************************************************/
 322 /* Functions for ioc                                                              */
 323 /**********************************************************************************/
 324
 325
 326 static void __init toshiba_rbtx4927_irq_ioc_init(void)
 327 {
 328         int i;
 329
 330         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_INIT,
 331                                      "beg=%d end=%d\n",
 332                                      TOSHIBA_RBTX4927_IRQ_IOC_BEG,
 333                                      TOSHIBA_RBTX4927_IRQ_IOC_END);
 334
 335         for (i = TOSHIBA_RBTX4927_IRQ_IOC_BEG;
 336              i <= TOSHIBA_RBTX4927_IRQ_IOC_END; i++)
 337                 set_irq_chip_and_handler(i, &toshiba_rbtx4927_irq_ioc_type,
 338                                          handle_level_irq);
 339
 340         setup_irq(TOSHIBA_RBTX4927_IRQ_NEST_IOC_ON_PIC,
 341                   &toshiba_rbtx4927_irq_ioc_action);
 342 }
 343
 344 static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq)
 345 {
 346         volatile unsigned char v;
 347
 348         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_ENABLE,
 349                                      "irq=%d\n", irq);
 350
 351         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 352             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 353                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 354                                              "bad irq=%d\n", irq);
 355                 panic("\n");
 356         }
 357
 358         v = TX4927_RD08(TOSHIBA_RBTX4927_IOC_INTR_ENAB);
 359         v |= (1 << (irq - TOSHIBA_RBTX4927_IRQ_IOC_BEG));
 360         TOSHIBA_RBTX4927_WR08(TOSHIBA_RBTX4927_IOC_INTR_ENAB, v);
 361 }
 362
 363
 364 static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq)
 365 {
 366         volatile unsigned char v;
 367
 368         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_DISABLE,
 369                                      "irq=%d\n", irq);
 370
 371         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 372             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 373                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 374                                              "bad irq=%d\n", irq);
 375                 panic("\n");
 376         }
 377
 378         v = TX4927_RD08(TOSHIBA_RBTX4927_IOC_INTR_ENAB);
 379         v &= ~(1 << (irq - TOSHIBA_RBTX4927_IRQ_IOC_BEG));
 380         TOSHIBA_RBTX4927_WR08(TOSHIBA_RBTX4927_IOC_INTR_ENAB, v);
 381 }
 382
 383
 384 /**********************************************************************************/
 385 /* Functions for isa                                                              */
 386 /**********************************************************************************/
 387
 388
 389 #ifdef CONFIG_TOSHIBA_FPCIB0
 390 static void __init toshiba_rbtx4927_irq_isa_init(void)
 391 {
 392         int i;
 393
 394         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_INIT,
 395                                      "beg=%d end=%d\n",
 396                                      TOSHIBA_RBTX4927_IRQ_ISA_BEG,
 397                                      TOSHIBA_RBTX4927_IRQ_ISA_END);
 398
 399         for (i = TOSHIBA_RBTX4927_IRQ_ISA_BEG;
 400              i <= TOSHIBA_RBTX4927_IRQ_ISA_END; i++)
 401                 set_irq_chip_and_handler(i, &toshiba_rbtx4927_irq_isa_type,
 402                                          handle_level_irq);
 403
 404         setup_irq(TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_IOC,
 405                   &toshiba_rbtx4927_irq_isa_master);
 406         setup_irq(TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_ISA,
 407                   &toshiba_rbtx4927_irq_isa_slave);
 408
 409         /* make sure we are looking at IRR (not ISR) */
 410         outb(0x0A, 0x20);
 411         outb(0x0A, 0xA0);
 412 }
 413 #endif
 414
 415
 416 #ifdef CONFIG_TOSHIBA_FPCIB0
 417 static void toshiba_rbtx4927_irq_isa_enable(unsigned int irq)
 418 {
 419         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_ENABLE,
 420                                      "irq=%d\n", irq);
 421
 422         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 423             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 424                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 425                                              "bad irq=%d\n", irq);
 426                 panic("\n");
 427         }
 428
 429         enable_8259A_irq(irq);
 430 }
 431 #endif
 432
 433
 434 #ifdef CONFIG_TOSHIBA_FPCIB0
 435 static void toshiba_rbtx4927_irq_isa_disable(unsigned int irq)
 436 {
 437         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_DISABLE,
 438                                      "irq=%d\n", irq);
 439
 440         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 441             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 442                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 443                                              "bad irq=%d\n", irq);
 444                 panic("\n");
 445         }
 446
 447         disable_8259A_irq(irq);
 448 }
 449 #endif
 450
 451
 452 #ifdef CONFIG_TOSHIBA_FPCIB0
 453 static void toshiba_rbtx4927_irq_isa_mask_and_ack(unsigned int irq)
 454 {
 455         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_MASK,
 456                                      "irq=%d\n", irq);
 457
 458         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 459             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 460                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 461                                              "bad irq=%d\n", irq);
 462                 panic("\n");
 463         }
 464
 465         mask_and_ack_8259A(irq);
 466 }
 467 #endif
 468
 469
 470 void __init arch_init_irq(void)
 471 {
 472         extern void tx4927_irq_init(void);
 473
 474         tx4927_irq_init();
 475         toshiba_rbtx4927_irq_ioc_init();
 476 #ifdef CONFIG_TOSHIBA_FPCIB0
 477         {
 478                 if (tx4927_using_backplane) {
 479                         toshiba_rbtx4927_irq_isa_init();
 480                 }
 481         }
 482 #endif
 483
 484         wbflush();
 485 }
 486
 487 void toshiba_rbtx4927_irq_dump(char *key)
 488 {
 489 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 490         {
 491                 u32 i, j = 0;
 492                 for (i = 0; i < NR_IRQS; i++) {
 493                         if (strcmp(irq_desc[i].chip->typename, "none")
 494                             == 0)
 495                                 continue;
 496
 497                         if ((i >= 1)
 498                             && (irq_desc[i - 1].chip->typename ==
 499                                 irq_desc[i].chip->typename)) {
 500                                 j++;
 501                         } else {
 502                                 j = 0;
 503                         }
 504                         TOSHIBA_RBTX4927_IRQ_DPRINTK
 505                             (TOSHIBA_RBTX4927_IRQ_INFO,
 506                              "%s irq=0x%02x/%3d s=0x%08x h=0x%08x a=0x%08x ah=0x%08x d=%1d n=%s/%02d\n",
 507                              key, i, i, irq_desc[i].status,
 508                              (u32) irq_desc[i].chip,
 509                              (u32) irq_desc[i].action,
 510                              (u32) (irq_desc[i].action ? irq_desc[i].
 511                                     action->handler : 0),
 512                              irq_desc[i].depth,
 513                              irq_desc[i].chip->typename, j);
 514                 }
 515         }
 516 #endif
 517 }
 518
 519 void toshiba_rbtx4927_irq_dump_pics(char *s)
 520 {
 521         u32 level0_m;
 522         u32 level0_s;
 523         u32 level1_m;
 524         u32 level1_s;
 525         u32 level2;
 526         u32 level2_p;
 527         u32 level2_s;
 528         u32 level3_m;
 529         u32 level3_s;
 530         u32 level4_m;
 531         u32 level4_s;
 532         u32 level5_m;
 533         u32 level5_s;
 534
 535         if (s == NULL)
 536                 s = "null";
 537
 538         level0_m = (read_c0_status() & 0x0000ff00) >> 8;
 539         level0_s = (read_c0_cause() & 0x0000ff00) >> 8;
 540
 541         level1_m = level0_m;
 542         level1_s = level0_s & 0x87;
 543
 544         level2 = TX4927_RD(0xff1ff6a0);
 545         level2_p = (((level2 & 0x10000)) ? 0 : 1);
 546         level2_s = (((level2 & 0x1f) == 0x1f) ? 0 : (level2 & 0x1f));
 547
 548         level3_m = reg_rd08(TOSHIBA_RBTX4927_IOC_INTR_ENAB) & 0x1f;
 549         level3_s = reg_rd08(TOSHIBA_RBTX4927_IOC_INTR_STAT) & 0x1f;
 550
 551         level4_m = inb(0x21);
 552         outb(0x0A, 0x20);
 553         level4_s = inb(0x20);
 554
 555         level5_m = inb(0xa1);
 556         outb(0x0A, 0xa0);
 557         level5_s = inb(0xa0);
 558
 559         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 560                                      "dump_raw_pic() ");
 561         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 562                                      "cp0:m=0x%02x/s=0x%02x ", level0_m,
 563                                      level0_s);
 564         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 565                                      "cp0:m=0x%02x/s=0x%02x ", level1_m,
 566                                      level1_s);
 567         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 568                                      "pic:e=0x%02x/s=0x%02x ", level2_p,
 569                                      level2_s);
 570         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 571                                      "ioc:m=0x%02x/s=0x%02x ", level3_m,
 572                                      level3_s);
 573         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 574                                      "sbm:m=0x%02x/s=0x%02x ", level4_m,
 575                                      level4_s);
 576         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 577                                      "sbs:m=0x%02x/s=0x%02x ", level5_m,
 578                                      level5_s);
 579         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO, "[%s]\n",
 580                                      s);
 581 }