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   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/config.h>
 115 #include <linux/init.h>
 116 #include <linux/kernel.h>
 117 #include <linux/types.h>
 118 #include <linux/mm.h>
 119 #include <linux/swap.h>
 120 #include <linux/ioport.h>
 121 #include <linux/sched.h>
 122 #include <linux/interrupt.h>
 123 #include <linux/pci.h>
 124 #include <linux/timex.h>
 125 #include <asm/bootinfo.h>
 126 #include <asm/page.h>
 127 #include <asm/io.h>
 128 #include <asm/irq.h>
 129 #include <asm/pci.h>
 130 #include <asm/processor.h>
 131 #include <asm/ptrace.h>
 132 #include <asm/reboot.h>
 133 #include <asm/time.h>
 134 #include <linux/bootmem.h>
 135 #include <linux/blkdev.h>
 136 #ifdef CONFIG_RTC_DS1742
 137 #include <linux/ds1742rtc.h>
 138 #endif
 139 #ifdef CONFIG_TOSHIBA_FPCIB0
 140 #include <asm/tx4927/smsc_fdc37m81x.h>
 141 #endif
 142 #include <asm/tx4927/toshiba_rbtx4927.h>
 143
 144
 145 #undef TOSHIBA_RBTX4927_IRQ_DEBUG
 146
 147 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 148 #define TOSHIBA_RBTX4927_IRQ_NONE        0x00000000
 149
 150 #define TOSHIBA_RBTX4927_IRQ_INFO          ( 1 <<  0 )
 151 #define TOSHIBA_RBTX4927_IRQ_WARN          ( 1 <<  1 )
 152 #define TOSHIBA_RBTX4927_IRQ_EROR          ( 1 <<  2 )
 153
 154 #define TOSHIBA_RBTX4927_IRQ_IOC_INIT      ( 1 << 10 )
 155 #define TOSHIBA_RBTX4927_IRQ_IOC_STARTUP   ( 1 << 11 )
 156 #define TOSHIBA_RBTX4927_IRQ_IOC_SHUTDOWN  ( 1 << 12 )
 157 #define TOSHIBA_RBTX4927_IRQ_IOC_ENABLE    ( 1 << 13 )
 158 #define TOSHIBA_RBTX4927_IRQ_IOC_DISABLE   ( 1 << 14 )
 159 #define TOSHIBA_RBTX4927_IRQ_IOC_MASK      ( 1 << 15 )
 160 #define TOSHIBA_RBTX4927_IRQ_IOC_ENDIRQ    ( 1 << 16 )
 161
 162 #define TOSHIBA_RBTX4927_IRQ_ISA_INIT      ( 1 << 20 )
 163 #define TOSHIBA_RBTX4927_IRQ_ISA_STARTUP   ( 1 << 21 )
 164 #define TOSHIBA_RBTX4927_IRQ_ISA_SHUTDOWN  ( 1 << 22 )
 165 #define TOSHIBA_RBTX4927_IRQ_ISA_ENABLE    ( 1 << 23 )
 166 #define TOSHIBA_RBTX4927_IRQ_ISA_DISABLE   ( 1 << 24 )
 167 #define TOSHIBA_RBTX4927_IRQ_ISA_MASK      ( 1 << 25 )
 168 #define TOSHIBA_RBTX4927_IRQ_ISA_ENDIRQ    ( 1 << 26 )
 169
 170 #define TOSHIBA_RBTX4927_SETUP_ALL         0xffffffff
 171 #endif
 172
 173
 174 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 175 static const u32 toshiba_rbtx4927_irq_debug_flag =
 176     (TOSHIBA_RBTX4927_IRQ_NONE | TOSHIBA_RBTX4927_IRQ_INFO |
 177      TOSHIBA_RBTX4927_IRQ_WARN | TOSHIBA_RBTX4927_IRQ_EROR
 178 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_INIT
 179 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_STARTUP
 180 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_SHUTDOWN
 181 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_ENABLE
 182 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_DISABLE
 183 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_MASK
 184 //                                                 | TOSHIBA_RBTX4927_IRQ_IOC_ENDIRQ
 185 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_INIT
 186 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_STARTUP
 187 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_SHUTDOWN
 188 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_ENABLE
 189 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_DISABLE
 190 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_MASK
 191 //                                                 | TOSHIBA_RBTX4927_IRQ_ISA_ENDIRQ
 192     );
 193 #endif
 194
 195
 196 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 197 #define TOSHIBA_RBTX4927_IRQ_DPRINTK(flag,str...) \
 198         if ( (toshiba_rbtx4927_irq_debug_flag) & (flag) ) \
 199         { \
 200            char tmp[100]; \
 201            sprintf( tmp, str ); \
 202            printk( "%s(%s:%u)::%s", __FUNCTION__, __FILE__, __LINE__, tmp ); \
 203         }
 204 #else
 205 #define TOSHIBA_RBTX4927_IRQ_DPRINTK(flag,str...)
 206 #endif
 207
 208
 209
 210
 211 #define TOSHIBA_RBTX4927_IRQ_IOC_RAW_BEG   0
 212 #define TOSHIBA_RBTX4927_IRQ_IOC_RAW_END   7
 213
 214 #define TOSHIBA_RBTX4927_IRQ_IOC_BEG  ((TX4927_IRQ_PIC_END+1)+TOSHIBA_RBTX4927_IRQ_IOC_RAW_BEG) /* 56 */
 215 #define TOSHIBA_RBTX4927_IRQ_IOC_END  ((TX4927_IRQ_PIC_END+1)+TOSHIBA_RBTX4927_IRQ_IOC_RAW_END) /* 63 */
 216
 217
 218 #define TOSHIBA_RBTX4927_IRQ_ISA_BEG MI8259_IRQ_ISA_BEG
 219 #define TOSHIBA_RBTX4927_IRQ_ISA_END MI8259_IRQ_ISA_END
 220 #define TOSHIBA_RBTX4927_IRQ_ISA_MID ((TOSHIBA_RBTX4927_IRQ_ISA_BEG+TOSHIBA_RBTX4927_IRQ_ISA_END+1)/2)
 221
 222
 223 #define TOSHIBA_RBTX4927_IRQ_NEST_IOC_ON_PIC TX4927_IRQ_NEST_EXT_ON_PIC
 224 #define TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_IOC (TOSHIBA_RBTX4927_IRQ_IOC_BEG+2)
 225 #define TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_ISA (TOSHIBA_RBTX4927_IRQ_ISA_BEG+2)
 226
 227 extern int tx4927_using_backplane;
 228
 229 #ifdef CONFIG_TOSHIBA_FPCIB0
 230 extern void enable_8259A_irq(unsigned int irq);
 231 extern void disable_8259A_irq(unsigned int irq);
 232 extern void mask_and_ack_8259A(unsigned int irq);
 233 #endif
 234
 235 static unsigned int toshiba_rbtx4927_irq_ioc_startup(unsigned int irq);
 236 static void toshiba_rbtx4927_irq_ioc_shutdown(unsigned int irq);
 237 static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq);
 238 static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq);
 239 static void toshiba_rbtx4927_irq_ioc_mask_and_ack(unsigned int irq);
 240 static void toshiba_rbtx4927_irq_ioc_end(unsigned int irq);
 241
 242 #ifdef CONFIG_TOSHIBA_FPCIB0
 243 static unsigned int toshiba_rbtx4927_irq_isa_startup(unsigned int irq);
 244 static void toshiba_rbtx4927_irq_isa_shutdown(unsigned int irq);
 245 static void toshiba_rbtx4927_irq_isa_enable(unsigned int irq);
 246 static void toshiba_rbtx4927_irq_isa_disable(unsigned int irq);
 247 static void toshiba_rbtx4927_irq_isa_mask_and_ack(unsigned int irq);
 248 static void toshiba_rbtx4927_irq_isa_end(unsigned int irq);
 249 #endif
 250
 251 static DEFINE_SPINLOCK(toshiba_rbtx4927_ioc_lock);
 252
 253
 254 #define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC"
 255 static struct hw_interrupt_type toshiba_rbtx4927_irq_ioc_type = {
 256         .typename = TOSHIBA_RBTX4927_IOC_NAME,
 257         .startup = toshiba_rbtx4927_irq_ioc_startup,
 258         .shutdown = toshiba_rbtx4927_irq_ioc_shutdown,
 259         .enable = toshiba_rbtx4927_irq_ioc_enable,
 260         .disable = toshiba_rbtx4927_irq_ioc_disable,
 261         .ack = toshiba_rbtx4927_irq_ioc_mask_and_ack,
 262         .end = toshiba_rbtx4927_irq_ioc_end,
 263         .set_affinity = NULL
 264 };
 265 #define TOSHIBA_RBTX4927_IOC_INTR_ENAB 0xbc002000
 266 #define TOSHIBA_RBTX4927_IOC_INTR_STAT 0xbc002006
 267
 268
 269 #ifdef CONFIG_TOSHIBA_FPCIB0
 270 #define TOSHIBA_RBTX4927_ISA_NAME "RBTX4927-ISA"
 271 static struct hw_interrupt_type toshiba_rbtx4927_irq_isa_type = {
 272         .typename = TOSHIBA_RBTX4927_ISA_NAME,
 273         .startup = toshiba_rbtx4927_irq_isa_startup,
 274         .shutdown = toshiba_rbtx4927_irq_isa_shutdown,
 275         .enable = toshiba_rbtx4927_irq_isa_enable,
 276         .disable = toshiba_rbtx4927_irq_isa_disable,
 277         .ack = toshiba_rbtx4927_irq_isa_mask_and_ack,
 278         .end = toshiba_rbtx4927_irq_isa_end,
 279         .set_affinity = NULL
 280 };
 281 #endif
 282
 283
 284 u32 bit2num(u32 num)
 285 {
 286         u32 i;
 287
 288         for (i = 0; i < (sizeof(num) * 8); i++) {
 289                 if (num & (1 << i)) {
 290                         return (i);
 291                 }
 292         }
 293         return (0);
 294 }
 295
 296 int toshiba_rbtx4927_irq_nested(int sw_irq)
 297 {
 298         u32 level3;
 299         u32 level4;
 300         u32 level5;
 301
 302         level3 = reg_rd08(TOSHIBA_RBTX4927_IOC_INTR_STAT) & 0x1f;
 303         if (level3) {
 304                 sw_irq = TOSHIBA_RBTX4927_IRQ_IOC_BEG + bit2num(level3);
 305                 if (sw_irq != TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_IOC) {
 306                         goto RETURN;
 307                 }
 308         }
 309 #ifdef CONFIG_TOSHIBA_FPCIB0
 310         {
 311                 if (tx4927_using_backplane) {
 312                         outb(0x0A, 0x20);
 313                         level4 = inb(0x20) & 0xff;
 314                         if (level4) {
 315                                 sw_irq =
 316                                     TOSHIBA_RBTX4927_IRQ_ISA_BEG +
 317                                     bit2num(level4);
 318                                 if (sw_irq !=
 319                                     TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_ISA) {
 320                                         goto RETURN;
 321                                 }
 322                         }
 323
 324                         outb(0x0A, 0xA0);
 325                         level5 = inb(0xA0) & 0xff;
 326                         if (level5) {
 327                                 sw_irq =
 328                                     TOSHIBA_RBTX4927_IRQ_ISA_MID +
 329                                     bit2num(level5);
 330                                 goto RETURN;
 331                         }
 332                 }
 333         }
 334 #endif
 335
 336       RETURN:
 337         return (sw_irq);
 338 }
 339
 340 //#define TOSHIBA_RBTX4927_PIC_ACTION(s) { no_action, 0, CPU_MASK_NONE, s, NULL, NULL }
 341 #define TOSHIBA_RBTX4927_PIC_ACTION(s) { no_action, SA_SHIRQ, CPU_MASK_NONE, s, NULL, NULL }
 342 static struct irqaction toshiba_rbtx4927_irq_ioc_action =
 343 TOSHIBA_RBTX4927_PIC_ACTION(TOSHIBA_RBTX4927_IOC_NAME);
 344 #ifdef CONFIG_TOSHIBA_FPCIB0
 345 static struct irqaction toshiba_rbtx4927_irq_isa_master =
 346 TOSHIBA_RBTX4927_PIC_ACTION(TOSHIBA_RBTX4927_ISA_NAME "/M");
 347 static struct irqaction toshiba_rbtx4927_irq_isa_slave =
 348 TOSHIBA_RBTX4927_PIC_ACTION(TOSHIBA_RBTX4927_ISA_NAME "/S");
 349 #endif
 350
 351
 352 /**********************************************************************************/
 353 /* Functions for ioc                                                              */
 354 /**********************************************************************************/
 355
 356
 357 static void __init toshiba_rbtx4927_irq_ioc_init(void)
 358 {
 359         int i;
 360
 361         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_INIT,
 362                                      "beg=%d end=%d\n",
 363                                      TOSHIBA_RBTX4927_IRQ_IOC_BEG,
 364                                      TOSHIBA_RBTX4927_IRQ_IOC_END);
 365
 366         for (i = TOSHIBA_RBTX4927_IRQ_IOC_BEG;
 367              i <= TOSHIBA_RBTX4927_IRQ_IOC_END; i++) {
 368                 irq_desc[i].status = IRQ_DISABLED;
 369                 irq_desc[i].action = 0;
 370                 irq_desc[i].depth = 3;
 371                 irq_desc[i].handler = &toshiba_rbtx4927_irq_ioc_type;
 372         }
 373
 374         setup_irq(TOSHIBA_RBTX4927_IRQ_NEST_IOC_ON_PIC,
 375                   &toshiba_rbtx4927_irq_ioc_action);
 376
 377         return;
 378 }
 379
 380 static unsigned int toshiba_rbtx4927_irq_ioc_startup(unsigned int irq)
 381 {
 382         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_STARTUP,
 383                                      "irq=%d\n", irq);
 384
 385         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 386             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 387                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 388                                              "bad irq=%d\n", irq);
 389                 panic("\n");
 390         }
 391
 392         toshiba_rbtx4927_irq_ioc_enable(irq);
 393
 394         return (0);
 395 }
 396
 397
 398 static void toshiba_rbtx4927_irq_ioc_shutdown(unsigned int irq)
 399 {
 400         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_SHUTDOWN,
 401                                      "irq=%d\n", irq);
 402
 403         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 404             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 405                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 406                                              "bad irq=%d\n", irq);
 407                 panic("\n");
 408         }
 409
 410         toshiba_rbtx4927_irq_ioc_disable(irq);
 411
 412         return;
 413 }
 414
 415
 416 static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq)
 417 {
 418         unsigned long flags;
 419         volatile unsigned char v;
 420
 421         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_ENABLE,
 422                                      "irq=%d\n", irq);
 423
 424         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 425             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 426                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 427                                              "bad irq=%d\n", irq);
 428                 panic("\n");
 429         }
 430
 431         spin_lock_irqsave(&toshiba_rbtx4927_ioc_lock, flags);
 432
 433         v = TX4927_RD08(TOSHIBA_RBTX4927_IOC_INTR_ENAB);
 434         v |= (1 << (irq - TOSHIBA_RBTX4927_IRQ_IOC_BEG));
 435         TOSHIBA_RBTX4927_WR08(TOSHIBA_RBTX4927_IOC_INTR_ENAB, v);
 436
 437         spin_unlock_irqrestore(&toshiba_rbtx4927_ioc_lock, flags);
 438
 439         return;
 440 }
 441
 442
 443 static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq)
 444 {
 445         unsigned long flags;
 446         volatile unsigned char v;
 447
 448         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_DISABLE,
 449                                      "irq=%d\n", irq);
 450
 451         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 452             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 453                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 454                                              "bad irq=%d\n", irq);
 455                 panic("\n");
 456         }
 457
 458         spin_lock_irqsave(&toshiba_rbtx4927_ioc_lock, flags);
 459
 460         v = TX4927_RD08(TOSHIBA_RBTX4927_IOC_INTR_ENAB);
 461         v &= ~(1 << (irq - TOSHIBA_RBTX4927_IRQ_IOC_BEG));
 462         TOSHIBA_RBTX4927_WR08(TOSHIBA_RBTX4927_IOC_INTR_ENAB, v);
 463
 464         spin_unlock_irqrestore(&toshiba_rbtx4927_ioc_lock, flags);
 465
 466         return;
 467 }
 468
 469
 470 static void toshiba_rbtx4927_irq_ioc_mask_and_ack(unsigned int irq)
 471 {
 472         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_MASK,
 473                                      "irq=%d\n", irq);
 474
 475         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 476             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 477                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 478                                              "bad irq=%d\n", irq);
 479                 panic("\n");
 480         }
 481
 482         toshiba_rbtx4927_irq_ioc_disable(irq);
 483
 484         return;
 485 }
 486
 487
 488 static void toshiba_rbtx4927_irq_ioc_end(unsigned int irq)
 489 {
 490         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_IOC_ENDIRQ,
 491                                      "irq=%d\n", irq);
 492
 493         if (irq < TOSHIBA_RBTX4927_IRQ_IOC_BEG
 494             || irq > TOSHIBA_RBTX4927_IRQ_IOC_END) {
 495                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 496                                              "bad irq=%d\n", irq);
 497                 panic("\n");
 498         }
 499
 500         if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
 501                 toshiba_rbtx4927_irq_ioc_enable(irq);
 502         }
 503
 504         return;
 505 }
 506
 507
 508 /**********************************************************************************/
 509 /* Functions for isa                                                              */
 510 /**********************************************************************************/
 511
 512
 513 #ifdef CONFIG_TOSHIBA_FPCIB0
 514 static void __init toshiba_rbtx4927_irq_isa_init(void)
 515 {
 516         int i;
 517
 518         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_INIT,
 519                                      "beg=%d end=%d\n",
 520                                      TOSHIBA_RBTX4927_IRQ_ISA_BEG,
 521                                      TOSHIBA_RBTX4927_IRQ_ISA_END);
 522
 523         for (i = TOSHIBA_RBTX4927_IRQ_ISA_BEG;
 524              i <= TOSHIBA_RBTX4927_IRQ_ISA_END; i++) {
 525                 irq_desc[i].status = IRQ_DISABLED;
 526                 irq_desc[i].action = 0;
 527                 irq_desc[i].depth =
 528                     ((i < TOSHIBA_RBTX4927_IRQ_ISA_MID) ? (4) : (5));
 529                 irq_desc[i].handler = &toshiba_rbtx4927_irq_isa_type;
 530         }
 531
 532         setup_irq(TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_IOC,
 533                   &toshiba_rbtx4927_irq_isa_master);
 534         setup_irq(TOSHIBA_RBTX4927_IRQ_NEST_ISA_ON_ISA,
 535                   &toshiba_rbtx4927_irq_isa_slave);
 536
 537         /* make sure we are looking at IRR (not ISR) */
 538         outb(0x0A, 0x20);
 539         outb(0x0A, 0xA0);
 540
 541         return;
 542 }
 543 #endif
 544
 545
 546 #ifdef CONFIG_TOSHIBA_FPCIB0
 547 static unsigned int toshiba_rbtx4927_irq_isa_startup(unsigned int irq)
 548 {
 549         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_STARTUP,
 550                                      "irq=%d\n", irq);
 551
 552         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 553             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 554                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 555                                              "bad irq=%d\n", irq);
 556                 panic("\n");
 557         }
 558
 559         toshiba_rbtx4927_irq_isa_enable(irq);
 560
 561         return (0);
 562 }
 563 #endif
 564
 565
 566 #ifdef CONFIG_TOSHIBA_FPCIB0
 567 static void toshiba_rbtx4927_irq_isa_shutdown(unsigned int irq)
 568 {
 569         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_SHUTDOWN,
 570                                      "irq=%d\n", irq);
 571
 572         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 573             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 574                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 575                                              "bad irq=%d\n", irq);
 576                 panic("\n");
 577         }
 578
 579         toshiba_rbtx4927_irq_isa_disable(irq);
 580
 581         return;
 582 }
 583 #endif
 584
 585
 586 #ifdef CONFIG_TOSHIBA_FPCIB0
 587 static void toshiba_rbtx4927_irq_isa_enable(unsigned int irq)
 588 {
 589         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_ENABLE,
 590                                      "irq=%d\n", irq);
 591
 592         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 593             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 594                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 595                                              "bad irq=%d\n", irq);
 596                 panic("\n");
 597         }
 598
 599         enable_8259A_irq(irq);
 600
 601         return;
 602 }
 603 #endif
 604
 605
 606 #ifdef CONFIG_TOSHIBA_FPCIB0
 607 static void toshiba_rbtx4927_irq_isa_disable(unsigned int irq)
 608 {
 609         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_DISABLE,
 610                                      "irq=%d\n", irq);
 611
 612         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 613             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 614                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 615                                              "bad irq=%d\n", irq);
 616                 panic("\n");
 617         }
 618
 619         disable_8259A_irq(irq);
 620
 621         return;
 622 }
 623 #endif
 624
 625
 626 #ifdef CONFIG_TOSHIBA_FPCIB0
 627 static void toshiba_rbtx4927_irq_isa_mask_and_ack(unsigned int irq)
 628 {
 629         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_MASK,
 630                                      "irq=%d\n", irq);
 631
 632         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 633             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 634                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 635                                              "bad irq=%d\n", irq);
 636                 panic("\n");
 637         }
 638
 639         mask_and_ack_8259A(irq);
 640
 641         return;
 642 }
 643 #endif
 644
 645
 646 #ifdef CONFIG_TOSHIBA_FPCIB0
 647 static void toshiba_rbtx4927_irq_isa_end(unsigned int irq)
 648 {
 649         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_ISA_ENDIRQ,
 650                                      "irq=%d\n", irq);
 651
 652         if (irq < TOSHIBA_RBTX4927_IRQ_ISA_BEG
 653             || irq > TOSHIBA_RBTX4927_IRQ_ISA_END) {
 654                 TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_EROR,
 655                                              "bad irq=%d\n", irq);
 656                 panic("\n");
 657         }
 658
 659         if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
 660                 toshiba_rbtx4927_irq_isa_enable(irq);
 661         }
 662
 663         return;
 664 }
 665 #endif
 666
 667
 668 void __init arch_init_irq(void)
 669 {
 670         extern void tx4927_irq_init(void);
 671
 672         local_irq_disable();
 673
 674         tx4927_irq_init();
 675         toshiba_rbtx4927_irq_ioc_init();
 676 #ifdef CONFIG_TOSHIBA_FPCIB0
 677         {
 678                 if (tx4927_using_backplane) {
 679                         toshiba_rbtx4927_irq_isa_init();
 680                 }
 681         }
 682 #endif
 683
 684         wbflush();
 685
 686         return;
 687 }
 688
 689 void toshiba_rbtx4927_irq_dump(char *key)
 690 {
 691 #ifdef TOSHIBA_RBTX4927_IRQ_DEBUG
 692         {
 693                 u32 i, j = 0;
 694                 for (i = 0; i < NR_IRQS; i++) {
 695                         if (strcmp(irq_desc[i].handler->typename, "none")
 696                             == 0)
 697                                 continue;
 698
 699                         if ((i >= 1)
 700                             && (irq_desc[i - 1].handler->typename ==
 701                                 irq_desc[i].handler->typename)) {
 702                                 j++;
 703                         } else {
 704                                 j = 0;
 705                         }
 706                         TOSHIBA_RBTX4927_IRQ_DPRINTK
 707                             (TOSHIBA_RBTX4927_IRQ_INFO,
 708                              "%s irq=0x%02x/%3d s=0x%08x h=0x%08x a=0x%08x ah=0x%08x d=%1d n=%s/%02d\n",
 709                              key, i, i, irq_desc[i].status,
 710                              (u32) irq_desc[i].handler,
 711                              (u32) irq_desc[i].action,
 712                              (u32) (irq_desc[i].action ? irq_desc[i].
 713                                     action->handler : 0),
 714                              irq_desc[i].depth,
 715                              irq_desc[i].handler->typename, j);
 716                 }
 717         }
 718 #endif
 719         return;
 720 }
 721
 722 void toshiba_rbtx4927_irq_dump_pics(char *s)
 723 {
 724         u32 level0_m;
 725         u32 level0_s;
 726         u32 level1_m;
 727         u32 level1_s;
 728         u32 level2;
 729         u32 level2_p;
 730         u32 level2_s;
 731         u32 level3_m;
 732         u32 level3_s;
 733         u32 level4_m;
 734         u32 level4_s;
 735         u32 level5_m;
 736         u32 level5_s;
 737
 738         if (s == NULL)
 739                 s = "null";
 740
 741         level0_m = (read_c0_status() & 0x0000ff00) >> 8;
 742         level0_s = (read_c0_cause() & 0x0000ff00) >> 8;
 743
 744         level1_m = level0_m;
 745         level1_s = level0_s & 0x87;
 746
 747         level2 = TX4927_RD(0xff1ff6a0);
 748         level2_p = (((level2 & 0x10000)) ? 0 : 1);
 749         level2_s = (((level2 & 0x1f) == 0x1f) ? 0 : (level2 & 0x1f));
 750
 751         level3_m = reg_rd08(TOSHIBA_RBTX4927_IOC_INTR_ENAB) & 0x1f;
 752         level3_s = reg_rd08(TOSHIBA_RBTX4927_IOC_INTR_STAT) & 0x1f;
 753
 754         level4_m = inb(0x21);
 755         outb(0x0A, 0x20);
 756         level4_s = inb(0x20);
 757
 758         level5_m = inb(0xa1);
 759         outb(0x0A, 0xa0);
 760         level5_s = inb(0xa0);
 761
 762         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 763                                      "dump_raw_pic() ");
 764         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 765                                      "cp0:m=0x%02x/s=0x%02x ", level0_m,
 766                                      level0_s);
 767         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 768                                      "cp0:m=0x%02x/s=0x%02x ", level1_m,
 769                                      level1_s);
 770         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 771                                      "pic:e=0x%02x/s=0x%02x ", level2_p,
 772                                      level2_s);
 773         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 774                                      "ioc:m=0x%02x/s=0x%02x ", level3_m,
 775                                      level3_s);
 776         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 777                                      "sbm:m=0x%02x/s=0x%02x ", level4_m,
 778                                      level4_s);
 779         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO,
 780                                      "sbs:m=0x%02x/s=0x%02x ", level5_m,
 781                                      level5_s);
 782         TOSHIBA_RBTX4927_IRQ_DPRINTK(TOSHIBA_RBTX4927_IRQ_INFO, "[%s]\n",
 783                                      s);
 784
 785         return;
 786 }