Annotation of Gnu-Mach/linux/dev/drivers/scsi/g_NCR5380.c, revision 1.1.1.2

1.1       root        1: /*
                      2:  * Generic Generic NCR5380 driver
                      3:  *     
                      4:  * Copyright 1993, Drew Eckhardt
                      5:  *     Visionary Computing
                      6:  *     (Unix and Linux consulting and custom programming)
                      7:  *     [email protected]
                      8:  *      +1 (303) 440-4894
                      9:  *
                     10:  * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
                     11:  *    [email protected]
                     12:  *
                     13:  * ALPHA RELEASE 1. 
                     14:  *
                     15:  * For more information, please consult 
                     16:  *
                     17:  * NCR 5380 Family
                     18:  * SCSI Protocol Controller
                     19:  * Databook
                     20:  *
                     21:  * NCR Microelectronics
                     22:  * 1635 Aeroplaza Drive
                     23:  * Colorado Springs, CO 80916
                     24:  * 1+ (719) 578-3400
                     25:  * 1+ (800) 334-5454
                     26:  */
                     27: 
                     28: /* 
                     29:  * TODO : flesh out DMA support, find some one actually using this (I have
                     30:  *     a memory mapped Trantor board that works fine)
                     31:  */
                     32: 
                     33: /*
                     34:  * Options :
                     35:  *
                     36:  * PARITY - enable parity checking.  Not supported.
                     37:  *
                     38:  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
                     39:  *
                     40:  * USLEEP - enable support for devices that don't disconnect.  Untested.
                     41:  *
                     42:  * The card is detected and initialized in one of several ways : 
                     43:  * 1.  With command line overrides - NCR5380=port,irq may be 
                     44:  *     used on the LILO command line to override the defaults.
                     45:  *
                     46:  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is 
                     47:  *     specified as an array of address, irq, dma, board tuples.  Ie, for
                     48:  *     one board at 0x350, IRQ5, no dma, I could say  
                     49:  *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
                     50:  * 
                     51:  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an 
                     52:  *     IRQ line if overridden on the command line.
                     53:  *
                     54:  * 3.  When included as a module, with arguments passed on the command line:
                     55:  *         ncr_irq=xx  the interrupt
                     56:  *         ncr_addr=xx  the port or base address (for port or memory
                     57:  *                     mapped, resp.)
                     58:  *         ncr_dma=xx  the DMA
                     59:  *         ncr_5380=1  to set up for a NCR5380 board
                     60:  *         ncr_53c400=1        to set up for a NCR53C400 board
                     61:  *     e.g.
                     62:  *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
                     63:  *       for a port mapped NCR5380 board or
                     64:  *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
                     65:  *       for a memory mapped NCR53C400 board with interrupts disabled.
                     66:  * 
                     67:  * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
                     68:  *     IRQ line if overridden on the command line.
                     69:  *     
                     70:  */
                     71: 
                     72: #ifdef MACH
                     73: #define GENERIC_NCR5380_OVERRIDE {{(NCR5380_map_type)0x350,5,0,BOARD_NCR53C400}};
                     74: #define CONFIG_SCSI_GENERIC_NCR53C400
                     75: #define CONFIG_SCSI_G_NCR5380_MEM
                     76: #endif
                     77: 
                     78: #define AUTOPROBE_IRQ
                     79: #define AUTOSENSE
                     80: 
                     81: #include <linux/config.h>
                     82: 
                     83: #ifdef CONFIG_SCSI_GENERIC_NCR53C400
                     84: #define NCR53C400_PSEUDO_DMA 1
                     85: #define PSEUDO_DMA
                     86: #define NCR53C400
                     87: #define NCR5380_STATS
                     88: #undef NCR5380_STAT_LIMIT
                     89: #endif
                     90: #if defined(CONFIG_SCSI_G_NCR5380_PORT) && defined(CONFIG_SCSI_G_NCR5380_MEM)
                     91: #error You can not configure the Generic NCR 5380 SCSI Driver for memory mapped I/O and port mapped I/O at the same time (yet)
                     92: #endif
                     93: #if !defined(CONFIG_SCSI_G_NCR5380_PORT) && !defined(CONFIG_SCSI_G_NCR5380_MEM)
                     94: #error You must configure the Generic NCR 5380 SCSI Driver for one of memory mapped I/O and port mapped I/O.
                     95: #endif
                     96: 
                     97: #include <asm/system.h>
                     98: #include <asm/io.h>
                     99: #include <linux/signal.h>
                    100: #include <linux/sched.h>
                    101: #include <linux/blk.h>
                    102: #include "scsi.h"
                    103: #include "hosts.h"
                    104: #include "g_NCR5380.h"
                    105: #include "NCR5380.h"
                    106: #include "constants.h"
                    107: #include "sd.h"
                    108: #include<linux/stat.h>
                    109: 
                    110: struct proc_dir_entry proc_scsi_g_ncr5380 = {
                    111:     PROC_SCSI_GENERIC_NCR5380, 9, "g_NCR5380",
                    112:     S_IFDIR | S_IRUGO | S_IXUGO, 2
                    113: };
                    114: 
                    115: #define NCR_NOT_SET 0
                    116: static int ncr_irq=NCR_NOT_SET;
                    117: static int ncr_dma=NCR_NOT_SET;
                    118: static int ncr_addr=NCR_NOT_SET;
                    119: static int ncr_5380=NCR_NOT_SET;
                    120: static int ncr_53c400=NCR_NOT_SET;
                    121: 
                    122: static struct override {
                    123:        NCR5380_implementation_fields;
                    124:     int irq;
                    125:     int dma;
                    126:     int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
                    127: } overrides 
                    128: #ifdef GENERIC_NCR5380_OVERRIDE 
                    129:     [] = GENERIC_NCR5380_OVERRIDE
                    130: #else
                    131:     [1] = {{0,},};
                    132: #endif
                    133: 
                    134: #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
                    135: 
                    136: /*
                    137:  * Function : static internal_setup(int board, char *str, int *ints)
                    138:  *
                    139:  * Purpose : LILO command line initialization of the overrides array,
                    140:  * 
                    141:  * Inputs : board - either BOARD_NCR5380 for a normal NCR5380 board, 
                    142:  *     or BOARD_NCR53C400 for a NCR53C400 board. str - unused, ints - 
                    143:  *     array of integer parameters with ints[0] equal to the number of ints.
                    144:  *
                    145:  */
                    146: 
                    147: static void internal_setup(int board, char *str, int *ints) {
                    148:     static int commandline_current = 0;
                    149:     switch (board) {
                    150:     case BOARD_NCR5380:
                    151:        if (ints[0] != 2 && ints[0] != 3) {
                    152:            printk("generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
                    153:            return;
                    154:        }
                    155:     case BOARD_NCR53C400:
                    156:        if (ints[0] != 2) {
                    157:            printk("generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
                    158:            return;
                    159:        }
                    160:     }
                    161: 
                    162:     if (commandline_current < NO_OVERRIDES) {
                    163:        overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type)ints[1];
                    164:        overrides[commandline_current].irq = ints[2];
                    165:        if (ints[0] == 3) 
                    166:            overrides[commandline_current].dma = ints[3];
                    167:        else 
                    168:            overrides[commandline_current].dma = DMA_NONE;
                    169:        overrides[commandline_current].board = board;
                    170:            ++commandline_current;
                    171:     }
                    172: }
                    173: 
                    174: /*
                    175:  * Function : generic_NCR5380_setup (char *str, int *ints)
                    176:  *
                    177:  * Purpose : LILO command line initialization of the overrides array,
                    178:  * 
                    179:  * Inputs : str - unused, ints - array of integer parameters with ints[0] 
                    180:  *     equal to the number of ints.
                    181:  */
                    182: 
                    183: void generic_NCR5380_setup (char *str, int *ints) {
                    184:     internal_setup (BOARD_NCR5380, str, ints);
                    185: }
                    186: 
                    187: /*
                    188:  * Function : generic_NCR53C400_setup (char *str, int *ints)
                    189:  *
                    190:  * Purpose : LILO command line initialization of the overrides array,
                    191:  * 
                    192:  * Inputs : str - unused, ints - array of integer parameters with ints[0] 
                    193:  *     equal to the number of ints.
                    194:  */
                    195: 
                    196: void generic_NCR53C400_setup (char *str, int *ints) {
                    197:     internal_setup (BOARD_NCR53C400, str, ints);
                    198: }
                    199: 
                    200: /* 
                    201:  * Function : int generic_NCR5380_detect(Scsi_Host_Template * tpnt)
                    202:  *
                    203:  * Purpose : initializes generic NCR5380 driver based on the 
                    204:  *     command line / compile time port and irq definitions.
                    205:  *
                    206:  * Inputs : tpnt - template for this SCSI adapter.
                    207:  * 
                    208:  * Returns : 1 if a host adapter was found, 0 if not.
                    209:  *
                    210:  */
                    211: 
                    212: int generic_NCR5380_detect(Scsi_Host_Template * tpnt) {
                    213:     static int current_override = 0;
                    214:     int count;
                    215:     int flags = 0;
                    216:     struct Scsi_Host *instance;
                    217: 
                    218:     if (ncr_irq != NCR_NOT_SET)
                    219:        overrides[0].irq=ncr_irq;
                    220:     if (ncr_dma != NCR_NOT_SET)
                    221:        overrides[0].dma=ncr_dma;
                    222:     if (ncr_addr != NCR_NOT_SET)
                    223:        overrides[0].NCR5380_map_name=(NCR5380_map_type)ncr_addr;
                    224:     if (ncr_5380 != NCR_NOT_SET)
                    225:        overrides[0].board=BOARD_NCR5380;
                    226:     else if (ncr_53c400 != NCR_NOT_SET)
                    227:        overrides[0].board=BOARD_NCR53C400;
                    228: 
                    229:     tpnt->proc_dir = &proc_scsi_g_ncr5380;
                    230: 
                    231:     for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
                    232:        if (!(overrides[current_override].NCR5380_map_name))
                    233:            continue;
                    234: 
                    235:        switch (overrides[current_override].board) {
                    236:        case BOARD_NCR5380:
                    237:            flags = FLAG_NO_PSEUDO_DMA;
                    238:            break;
                    239:        case BOARD_NCR53C400:
                    240:            flags = FLAG_NCR53C400;
                    241:            break;
                    242:        }
                    243: 
                    244:        instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
                    245:        instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
                    246: 
                    247:        NCR5380_init(instance, flags);
                    248: 
                    249:        if (overrides[current_override].irq != IRQ_AUTO)
                    250:            instance->irq = overrides[current_override].irq;
                    251:        else 
                    252:            instance->irq = NCR5380_probe_irq(instance, 0xffff);
                    253: 
                    254:        if (instance->irq != IRQ_NONE) 
                    255:            if (request_irq(instance->irq, generic_NCR5380_intr, SA_INTERRUPT, "NCR5380", NULL)) {
                    256:                printk("scsi%d : IRQ%d not free, interrupts disabled\n", 
                    257:                    instance->host_no, instance->irq);
                    258:                instance->irq = IRQ_NONE;
                    259:            } 
                    260: 
                    261:        if (instance->irq == IRQ_NONE) {
                    262:            printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
                    263:            printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
                    264:        }
                    265: 
                    266:        printk("scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int)instance->NCR5380_instance_name);
                    267:        if (instance->irq == IRQ_NONE)
                    268:            printk (" interrupts disabled");
                    269:        else 
                    270:            printk (" irq %d", instance->irq);
                    271:        printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
                    272:            CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
                    273:        NCR5380_print_options(instance);
                    274:        printk("\n");
                    275: 
                    276:        ++current_override;
                    277:        ++count;
                    278:     }
                    279:     return count;
                    280: }
                    281: 
                    282: const char * generic_NCR5380_info (struct Scsi_Host* host) {
                    283:     static const char string[]="Generic NCR5380/53C400 Driver";
                    284:     return string;
                    285: }
                    286: 
                    287: int generic_NCR5380_release_resources(struct Scsi_Host * instance)
                    288: {
                    289:     NCR5380_local_declare();
                    290: 
                    291:     NCR5380_setup(instance);
                    292: 
                    293:     if (instance->irq != IRQ_NONE)
                    294:        free_irq(instance->irq, NULL);
                    295: 
                    296:        return 0;
                    297: }
                    298: 
                    299: #ifdef BIOSPARAM
                    300: /*
                    301:  * Function : int generic_NCR5380_biosparam(Disk * disk, kdev_t dev, int *ip)
                    302:  *
                    303:  * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for 
                    304:  *     the specified device / size.
                    305:  * 
                    306:  * Inputs : size = size of device in sectors (512 bytes), dev = block device
                    307:  *     major / minor, ip[] = {heads, sectors, cylinders}  
                    308:  *
                    309:  * Returns : always 0 (success), initializes ip
                    310:  *     
                    311:  */
                    312: 
                    313: /* 
                    314:  * XXX Most SCSI boards use this mapping, I could be incorrect.  Some one
                    315:  * using hard disks on a trantor should verify that this mapping corresponds
                    316:  * to that used by the BIOS / ASPI driver by running the linux fdisk program
                    317:  * and matching the H_C_S coordinates to what DOS uses.
                    318:  */
                    319: 
                    320: int generic_NCR5380_biosparam(Disk * disk, kdev_t dev, int *ip)
                    321: {
                    322:   int size = disk->capacity;
                    323:   ip[0] = 64;
                    324:   ip[1] = 32;
                    325:   ip[2] = size >> 11;
                    326:   return 0;
                    327: }
                    328: #endif
                    329: 
                    330: #if NCR53C400_PSEUDO_DMA
                    331: static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,    int len)
                    332: {
                    333:     int blocks = len / 128;
                    334:     int start = 0;
                    335:     int i;
                    336:     int bl;
                    337:     NCR5380_local_declare();
                    338: 
                    339:     NCR5380_setup(instance);
                    340: 
                    341: #if (NDEBUG & NDEBUG_C400_PREAD)
                    342:     printk("53C400r: About to read %d blocks for %d bytes\n", blocks, len);
                    343: #endif
                    344: 
                    345:     NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
                    346:     NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
                    347:     while (1) {
                    348:     
                    349: #if (NDEBUG & NDEBUG_C400_PREAD)
                    350:        printk("53C400r: %d blocks left\n", blocks);
                    351: #endif
                    352: 
                    353:        if ((bl=NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
                    354: #if (NDEBUG & NDEBUG_C400_PREAD)
                    355:            if (blocks)
                    356:                printk("53C400r: blocks still == %d\n", blocks);
                    357:            else
                    358:                printk("53C400r: Exiting loop\n");
                    359: #endif
                    360:            break;
                    361:        }
                    362: 
                    363: #if 1
                    364:        if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
                    365:            printk("53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
                    366:            return -1;
                    367:        }
                    368: #endif
                    369: 
                    370: #if (NDEBUG & NDEBUG_C400_PREAD)
                    371:        printk("53C400r: Waiting for buffer, bl=%d\n", bl);
                    372: #endif
                    373: 
                    374:        while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
                    375:            ;
                    376: #if (NDEBUG & NDEBUG_C400_PREAD)
                    377:        printk("53C400r: Transferring 128 bytes\n");
                    378: #endif
                    379: 
                    380: #ifdef CONFIG_SCSI_G_NCR5380_PORT
                    381:        for (i=0; i<128; i++)
                    382:            dst[start+i] = NCR5380_read(C400_HOST_BUFFER);
                    383: #else
                    384:        /* implies CONFIG_SCSI_G_NCR5380_MEM */
                    385:        memmove(dst+start,NCR53C400_host_buffer+NCR5380_map_name,128);
                    386: #endif
                    387:        start+=128;
                    388:        blocks--;
                    389:     }
                    390: 
                    391:     if (blocks) {
                    392: #if (NDEBUG & NDEBUG_C400_PREAD)
                    393:        printk("53C400r: EXTRA: Waiting for buffer\n");
                    394: #endif
                    395:        while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
                    396:            ;
                    397: 
                    398: #if (NDEBUG & NDEBUG_C400_PREAD)
                    399:        printk("53C400r: Transferring EXTRA 128 bytes\n");
                    400: #endif
                    401: #ifdef CONFIG_SCSI_G_NCR5380_PORT
                    402:        for (i=0; i<128; i++)
                    403:            dst[start+i] = NCR5380_read(C400_HOST_BUFFER);
                    404: #else
                    405:        /* implies CONFIG_SCSI_G_NCR5380_MEM */
                    406:        memmove(dst+start,NCR53C400_host_buffer+NCR5380_map_name,128);
                    407: #endif
                    408:        start+=128;
                    409:        blocks--;
                    410:     }
                    411: #if (NDEBUG & NDEBUG_C400_PREAD)
                    412:     else
                    413:        printk("53C400r: No EXTRA required\n");
                    414: #endif
                    415: 
                    416: #if (NDEBUG & NDEBUG_C400_PREAD)
                    417:     printk("53C400r: Final values: blocks=%d   start=%d\n", blocks, start);
                    418: #endif
                    419: 
                    420:     if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
                    421:        printk("53C400r: no 53C80 gated irq after transfer");
                    422: #if (NDEBUG & NDEBUG_C400_PREAD)
                    423:     else
                    424:        printk("53C400r: Got 53C80 interrupt and tried to clear it\n");
                    425: #endif
                    426: 
                    427: /* DON'T DO THIS - THEY NEVER ARRIVE!
                    428:     printk("53C400r: Waiting for 53C80 registers\n");
                    429:     while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
                    430:        ;
                    431: */
                    432: 
                    433:     if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
                    434:        printk("53C400r: no end dma signal\n");
                    435: #if (NDEBUG & NDEBUG_C400_PREAD)
                    436:     else
                    437:        printk("53C400r: end dma as expected\n");
                    438: #endif
                    439: 
                    440:     NCR5380_write(MODE_REG, MR_BASE);
                    441:     NCR5380_read(RESET_PARITY_INTERRUPT_REG);
                    442:     return 0;
                    443: }
                    444:                
                    445: static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,    int len)
                    446: {
                    447:     int blocks = len / 128;
                    448:     int start = 0;
                    449:     int i;
                    450:     int bl;
                    451:     NCR5380_local_declare();
                    452: 
                    453:     NCR5380_setup(instance);
                    454: 
                    455: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    456:     printk("53C400w: About to write %d blocks for %d bytes\n", blocks, len);
                    457: #endif
                    458: 
                    459:     NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
                    460:     NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
                    461:     while (1) {
                    462:        if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
                    463:            printk("53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
                    464:            return -1;
                    465:        }
                    466: 
                    467:        if ((bl=NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
                    468: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    469:            if (blocks)
                    470:                printk("53C400w: exiting loop, blocks still == %d\n", blocks);
                    471:            else
                    472:                printk("53C400w: exiting loop\n");
                    473: #endif
                    474:            break;
                    475:        }
                    476: 
                    477: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    478:        printk("53C400w: %d blocks left\n", blocks);
                    479: 
                    480:        printk("53C400w: waiting for buffer, bl=%d\n", bl);
                    481: #endif
                    482:        while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
                    483:            ;
                    484: 
                    485: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    486:        printk("53C400w: transferring 128 bytes\n");
                    487: #endif
                    488: #ifdef CONFIG_SCSI_G_NCR5380_PORT
                    489:        for (i=0; i<128; i++)
                    490:            NCR5380_write(C400_HOST_BUFFER, src[start+i]);
                    491: #else
                    492:        /* implies CONFIG_SCSI_G_NCR5380_MEM */
                    493:        memmove(NCR53C400_host_buffer+NCR5380_map_name,src+start,128);
                    494: #endif
                    495:        start+=128;
                    496:        blocks--;
                    497:     }
                    498:     if (blocks) {
                    499: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    500:        printk("53C400w: EXTRA waiting for buffer\n");
                    501: #endif
                    502:        while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
                    503:            ;
                    504: 
                    505: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    506:        printk("53C400w: transferring EXTRA 128 bytes\n");
                    507: #endif
                    508: #ifdef CONFIG_SCSI_G_NCR5380_PORT
                    509:        for (i=0; i<128; i++)
                    510:            NCR5380_write(C400_HOST_BUFFER, src[start+i]);
                    511: #else
                    512:        /* implies CONFIG_SCSI_G_NCR5380_MEM */
                    513:        memmove(NCR53C400_host_buffer+NCR5380_map_name,src+start,128);
                    514: #endif
                    515:        start+=128;
                    516:        blocks--;
                    517:     }
                    518: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    519:     else
                    520:        printk("53C400w: No EXTRA required\n");
                    521: #endif
                    522:     
                    523: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    524:     printk("53C400w: Final values: blocks=%d   start=%d\n", blocks, start);
                    525: #endif
                    526: 
                    527: #if 0
                    528:     printk("53C400w: waiting for registers to be available\n");
                    529:     THEY NEVER DO!
                    530:     while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
                    531:        ;
                    532:     printk("53C400w: Got em\n");
                    533: #endif
                    534: 
                    535:     /* Let's wait for this instead - could be ugly */
                    536:     /* All documentation says to check for this. Maybe my hardware is too
                    537:      * fast. Waiting for it seems to work fine! KLL
                    538:      */
                    539:     while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
                    540:        ;
                    541: 
                    542:     /*
                    543:      * I know. i is certainly != 0 here but the loop is new. See previous
                    544:      * comment.
                    545:      */
                    546:     if (i) {
                    547: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    548:        printk("53C400w: got 53C80 gated irq (last block)\n");
                    549: #endif
                    550:        if (!((i=NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
                    551:            printk("53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n",i);
                    552: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    553:        else
                    554:            printk("53C400w: Got END OF DMA\n");
                    555: #endif
                    556:     }
                    557:     else
                    558:        printk("53C400w: no 53C80 gated irq after transfer (last block)\n");
                    559: 
                    560: #if 0
                    561:     if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
                    562:        printk("53C400w: no end dma signal\n");
                    563:     }
                    564: #endif
                    565: 
                    566: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    567:     printk("53C400w: waiting for last byte...\n");
                    568: #endif
                    569:     while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
                    570:        ;
                    571: 
                    572: #if (NDEBUG & NDEBUG_C400_PWRITE)
                    573:     printk("53C400w:     got last byte.\n");
                    574:     printk("53C400w: pwrite exiting with status 0, whoopee!\n");
                    575: #endif
                    576:     return 0;
                    577: }
                    578: #endif /* PSEUDO_DMA */
                    579: 
                    580: #include "NCR5380.c"
                    581: 
                    582: #define PRINTP(x) len += sprintf(buffer+len, x)
                    583: #define ANDP ,
                    584: 
                    585: static int sprint_opcode(char* buffer, int len, int opcode) {
                    586:     int start = len;
                    587:     PRINTP("0x%02x " ANDP opcode);
                    588:     return len-start;
                    589: }
                    590: 
                    591: static int sprint_command (char* buffer, int len, unsigned char *command) {
                    592:     int i,s,start=len;
                    593:     len += sprint_opcode(buffer, len, command[0]);
                    594:     for ( i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
                    595:        PRINTP("%02x " ANDP command[i]);
                    596:     PRINTP("\n");
                    597:     return len-start;
                    598: }
                    599: 
                    600: static int sprint_Scsi_Cmnd (char* buffer, int len, Scsi_Cmnd *cmd) {
                    601:     int start = len;
                    602:     PRINTP("host number %d destination target %d, lun %d\n" ANDP
                    603:        cmd->host->host_no ANDP
                    604:        cmd->target ANDP
                    605:        cmd->lun);
                    606:     PRINTP("        command = ");
                    607:     len += sprint_command (buffer, len, cmd->cmnd);
                    608:     return len-start;
                    609: }
                    610: 
                    611: int generic_NCR5380_proc_info(char* buffer, char** start, off_t offset, int length, int hostno, int inout)
                    612: {
                    613:     int len = 0;
                    614:     NCR5380_local_declare();
                    615:     unsigned char status;
                    616:     int i;
                    617:     struct Scsi_Host *scsi_ptr;
                    618:     Scsi_Cmnd *ptr;
                    619:     Scsi_Device *dev;
                    620:     struct NCR5380_hostdata *hostdata;
                    621: 
                    622:     cli();
                    623: 
                    624:     for (scsi_ptr = first_instance; scsi_ptr; scsi_ptr=scsi_ptr->next)
                    625:        if (scsi_ptr->host_no == hostno)
                    626:            break;
                    627:     NCR5380_setup(scsi_ptr);
                    628:     hostdata = (struct NCR5380_hostdata *)scsi_ptr->hostdata;
                    629: 
                    630:     PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
                    631:     PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
                    632:     PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
                    633: #ifdef NCR53C400
                    634:     PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
                    635:     PRINTP("NCR53C400 card%s detected\n" ANDP  (((struct NCR5380_hostdata *)scsi_ptr->hostdata)->flags & FLAG_NCR53C400)?"":" not");
                    636: # if NCR53C400_PSEUDO_DMA
                    637:     PRINTP("NCR53C400 pseudo DMA used\n");
                    638: # endif
                    639: #else
                    640:     PRINTP("NO NCR53C400 driver extensions\n");
                    641: #endif
                    642:     PRINTP("Using %s mapping at %s 0x%x, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
                    643:     if (scsi_ptr->irq == IRQ_NONE)
                    644:        PRINTP("no interrupt\n");
                    645:     else
                    646:        PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
                    647: 
                    648: #ifdef NCR5380_STATS
                    649:     if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
                    650:        PRINTP("There are commands pending, transfer rates may be crud\n");
                    651:     if (hostdata->pendingr)
                    652:        PRINTP("  %d pending reads" ANDP hostdata->pendingr);
                    653:     if (hostdata->pendingw)
                    654:        PRINTP("  %d pending writes" ANDP hostdata->pendingw);
                    655:     if (hostdata->pendingr || hostdata->pendingw)
                    656:        PRINTP("\n");
                    657:     for (dev = scsi_devices; dev; dev=dev->next) {
                    658:        if (dev->host == scsi_ptr) {
                    659:            unsigned long br = hostdata->bytes_read[dev->id];
                    660:            unsigned long bw = hostdata->bytes_write[dev->id];
                    661:            long tr = hostdata->time_read[dev->id] / HZ;
                    662:            long tw = hostdata->time_write[dev->id] / HZ;
                    663: 
                    664:            PRINTP("  T:%d %s " ANDP dev->id ANDP (dev->type < MAX_SCSI_DEVICE_CODE) ? scsi_device_types[(int)dev->type] : "Unknown");
                    665:            for (i=0; i<8; i++)
                    666:                if (dev->vendor[i] >= 0x20)
                    667:                    *(buffer+(len++)) = dev->vendor[i];
                    668:            *(buffer+(len++)) = ' ';
                    669:            for (i=0; i<16; i++)
                    670:                if (dev->model[i] >= 0x20)
                    671:                    *(buffer+(len++)) = dev->model[i];
                    672:            *(buffer+(len++)) = ' ';
                    673:            for (i=0; i<4; i++)
                    674:                if (dev->rev[i] >= 0x20)
                    675:                    *(buffer+(len++)) = dev->rev[i];
                    676:            *(buffer+(len++)) = ' ';
                    677:                                    
                    678:            PRINTP("\n%10ld kb read    in %5ld secs" ANDP br/1024 ANDP tr);
                    679:            if (tr)
                    680:                PRINTP(" @ %5ld bps" ANDP br / tr); 
                    681: 
                    682:            PRINTP("\n%10ld kb written in %5ld secs" ANDP bw/1024 ANDP tw);
                    683:            if (tw)
                    684:                PRINTP(" @ %5ld bps" ANDP bw / tw); 
                    685:            PRINTP("\n");
                    686:        }
                    687:     }
                    688: #endif
                    689:        
                    690:     status = NCR5380_read(STATUS_REG);
                    691:     if (!(status & SR_REQ))
                    692:        PRINTP("REQ not asserted, phase unknown.\n");
                    693:     else {
                    694:        for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
                    695:                    (phases[i].value != (status & PHASE_MASK)); ++i)
                    696:            ;
                    697:        PRINTP("Phase %s\n" ANDP phases[i].name);
                    698:     }
                    699: 
                    700:     if (!hostdata->connected) {
                    701:        PRINTP("No currently connected command\n");
                    702:     } else {
                    703:        len += sprint_Scsi_Cmnd (buffer, len, (Scsi_Cmnd *) hostdata->connected);
                    704:     }
                    705: 
                    706:     PRINTP("issue_queue\n");
                    707: 
                    708:     for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr;
                    709:                ptr = (Scsi_Cmnd *) ptr->host_scribble)
                    710:        len += sprint_Scsi_Cmnd (buffer, len, ptr);
                    711: 
                    712:     PRINTP("disconnected_queue\n");
                    713: 
                    714:     for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr;
                    715:                ptr = (Scsi_Cmnd *) ptr->host_scribble)
                    716:        len += sprint_Scsi_Cmnd (buffer, len, ptr);
                    717:        
                    718:     *start = buffer + offset;
                    719:     len -= offset;
                    720:     if (len > length)
                    721:            len = length;
                    722:     sti();
                    723:     return len;
                    724: }
                    725: 
                    726: #undef PRINTP
                    727: #undef ANDP
                    728: 
                    729: #ifdef MODULE
                    730: /* Eventually this will go into an include file, but this will be later */
                    731: Scsi_Host_Template driver_template = GENERIC_NCR5380;
                    732: 
                    733: #include <linux/module.h>
                    734: #include "scsi_module.c"
                    735: #endif

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