wd33c93.c

linux和2410结合开发 用他可以生成2410所需的zImage文件

                 instance->host_no, cmd->pid);
         printk("returning ABORT_SNOOZE. ");
    enable_irq(cmd->host->irq);
         return SCSI_ABORT_SNOOZE;
         }
      tmp = (Scsi_Cmnd *)tmp->host_scribble;
      }

/*
 * Case 4 : If we reached this point, the command was not found in any of
 *     the queues.
 *
 * We probably reached this point because of an unlikely race condition
 * between the command completing successfully and the abortion code,
 * so we won't panic, but we will notify the user in case something really
 * broke.
 */

/*   sti();*/
   wd33c93_execute (instance);

   enable_irq(cmd->host->irq);
   printk("scsi%d: warning : SCSI command probably completed successfully"
      "         before abortion. ", instance->host_no);
   return SCSI_ABORT_NOT_RUNNING;
}



#define MAX_WD33C93_HOSTS 4
#define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *)))
#define SETUP_BUFFER_SIZE 200
static char setup_buffer[SETUP_BUFFER_SIZE];
static char setup_used[MAX_SETUP_ARGS];
static int done_setup = 0;

int wd33c93_setup (char *str)
{
   int i;
   char *p1,*p2;

   /* The kernel does some processing of the command-line before calling
    * this function: If it begins with any decimal or hex number arguments,
    * ints[0] = how many numbers found and ints[1] through [n] are the values
    * themselves. str points to where the non-numeric arguments (if any)
    * start: We do our own parsing of those. We construct synthetic 'nosync'
    * keywords out of numeric args (to maintain compatibility with older
    * versions) and then add the rest of the arguments.
    */

   p1 = setup_buffer;
   *p1 = '\0';
#if 0
/*
 * Old style command line arguments are now dead
 */
   if (ints[0]) {
      for (i=0; i<ints[0]; i++) {
         x = vsprintf(p1,"nosync:0x%02x,",&(ints[i+1]));
         p1 += x;
         }
      }
#endif
   if (str)
      strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
   setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
   p1 = setup_buffer;
   i = 0;
   while (*p1 && (i < MAX_SETUP_ARGS)) {
      p2 = strchr(p1, ',');
      if (p2) {
         *p2 = '\0';
         if (p1 != p2)
            setup_args[i] = p1;
         p1 = p2 + 1;
         i++;
         }
      else {
         setup_args[i] = p1;
         break;
         }
      }
   for (i=0; i<MAX_SETUP_ARGS; i++)
      setup_used[i] = 0;
   done_setup = 1;

   return 1;
}

__setup("wd33c93", wd33c93_setup);


/* check_setup_args() returns index if key found, 0 if not
 */

static int check_setup_args(char *key, int *flags, int *val, char *buf)
{
int x;
char *cp;

   for  (x=0; x<MAX_SETUP_ARGS; x++) {
      if (setup_used[x])
         continue;
      if (!strncmp(setup_args[x], key, strlen(key)))
         break;
      if (!strncmp(setup_args[x], "next", strlen("next")))
         return 0;
      }
   if (x == MAX_SETUP_ARGS)
      return 0;
   setup_used[x] = 1;
   cp = setup_args[x] + strlen(key);
   *val = -1;
   if (*cp != ':')
      return ++x;
   cp++;
   if ((*cp >= '0') && (*cp <= '9')) {
      *val = simple_strtoul(cp,NULL,0);
      }
   return ++x;
}



void wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs,
		  dma_setup_t setup, dma_stop_t stop, int clock_freq)
{
struct WD33C93_hostdata *hostdata;
int i;
int flags;
int val;
char buf[32];

   if (!done_setup && setup_strings)
      wd33c93_setup(setup_strings);

   hostdata = (struct WD33C93_hostdata *)instance->hostdata;

   hostdata->regs = regs;
   hostdata->clock_freq = clock_freq;
   hostdata->dma_setup = setup;
   hostdata->dma_stop = stop;
   hostdata->dma_bounce_buffer = NULL;
   hostdata->dma_bounce_len = 0;
   for (i = 0; i < 8; i++) {
      hostdata->busy[i] = 0;
      hostdata->sync_xfer[i] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF);
      hostdata->sync_stat[i] = SS_UNSET;  /* using default sync values */
#ifdef PROC_STATISTICS
      hostdata->cmd_cnt[i] = 0;
      hostdata->disc_allowed_cnt[i] = 0;
      hostdata->disc_done_cnt[i] = 0;
#endif
      }
   hostdata->input_Q = NULL;
   hostdata->selecting = NULL;
   hostdata->connected = NULL;
   hostdata->disconnected_Q = NULL;
   hostdata->state = S_UNCONNECTED;
   hostdata->dma = D_DMA_OFF;
   hostdata->level2 = L2_BASIC;
   hostdata->disconnect = DIS_ADAPTIVE;
   hostdata->args = DEBUG_DEFAULTS;
   hostdata->incoming_ptr = 0;
   hostdata->outgoing_len = 0;
   hostdata->default_sx_per = DEFAULT_SX_PER;
   hostdata->no_sync = 0xff;     /* sync defaults to off */
   hostdata->no_dma = 0;         /* default is DMA enabled */

#ifdef PROC_INTERFACE
   hostdata->proc = PR_VERSION|PR_INFO|PR_STATISTICS|
                    PR_CONNECTED|PR_INPUTQ|PR_DISCQ|
                    PR_STOP;
#ifdef PROC_STATISTICS
   hostdata->dma_cnt = 0;
   hostdata->pio_cnt = 0;
   hostdata->int_cnt = 0;
#endif
#endif


   if (check_setup_args("nosync",&flags,&val,buf))
      hostdata->no_sync = val;

   if (check_setup_args("nodma",&flags,&val,buf))
      hostdata->no_dma = (val == -1) ? 1 : val;

   if (check_setup_args("period",&flags,&val,buf))
      hostdata->default_sx_per = sx_table[round_period((unsigned int)val)].period_ns;

   if (check_setup_args("disconnect",&flags,&val,buf)) {
      if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS))
         hostdata->disconnect = val;
      else
         hostdata->disconnect = DIS_ADAPTIVE;
      }

   if (check_setup_args("level2",&flags,&val,buf))
      hostdata->level2 = val;

   if (check_setup_args("debug",&flags,&val,buf))
      hostdata->args = val & DB_MASK;

   if (check_setup_args("clock",&flags,&val,buf)) {
      if (val>7 && val<11)
         val = WD33C93_FS_8_10;
      else if (val>11 && val<16)
         val = WD33C93_FS_12_15;
      else if (val>15 && val<21)
         val = WD33C93_FS_16_20;
      else
         val = WD33C93_FS_8_10;
      hostdata->clock_freq = val;
      }

   if ((i = check_setup_args("next",&flags,&val,buf))) {
      while (i)
         setup_used[--i] = 1;
      }

#ifdef PROC_INTERFACE
   if (check_setup_args("proc",&flags,&val,buf))
      hostdata->proc = val;
#endif


   { unsigned long flags;
     save_flags(flags);
     cli();
     reset_wd33c93(instance);
     restore_flags(flags);
   }

   printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",instance->host_no,
         (hostdata->chip==C_WD33C93)?"WD33c93":
         (hostdata->chip==C_WD33C93A)?"WD33c93A":
         (hostdata->chip==C_WD33C93B)?"WD33c93B":"unknown",
         hostdata->microcode,hostdata->no_sync,hostdata->no_dma);
#ifdef DEBUGGING_ON
   printk(" debug_flags=0x%02x\n",hostdata->args);
#else
   printk(" debugging=OFF\n");
#endif
   printk("           setup_args=");
   for (i=0; i<MAX_SETUP_ARGS; i++)
      printk("%s,",setup_args[i]);
   printk("\n");
   printk("           Version %s - %s, Compiled %s at %s\n",
               WD33C93_VERSION,WD33C93_DATE,__DATE__,__TIME__);
   MOD_INC_USE_COUNT;
}


int wd33c93_proc_info(char *buf, char **start, off_t off, int len, int hn, int in)
{

#ifdef PROC_INTERFACE

char *bp;
char tbuf[128];
unsigned long flags;
struct Scsi_Host *instance;
struct WD33C93_hostdata *hd;
Scsi_Cmnd *cmd;
int x,i;
static int stop = 0;

   for (instance=scsi_hostlist; instance; instance=instance->next) {
      if (instance->host_no == hn)
         break;
      }
   if (!instance) {
      printk("*** Hmm... Can't find host #%d!\n",hn);
      return (-ESRCH);
      }
   hd = (struct WD33C93_hostdata *)instance->hostdata;

/* If 'in' is TRUE we need to _read_ the proc file. We accept the following
 * keywords (same format as command-line, but only ONE per read):
 *    debug
 *    disconnect
 *    period
 *    resync
 *    proc
 *    nodma
 */

   if (in) {
      buf[len] = '\0';
      bp = buf;
      if (!strncmp(bp,"debug:",6)) {
         bp += 6;
         hd->args = simple_strtoul(bp,NULL,0) & DB_MASK;
         }
      else if (!strncmp(bp,"disconnect:",11)) {
         bp += 11;
         x = simple_strtoul(bp,NULL,0);
         if (x < DIS_NEVER || x > DIS_ALWAYS)
            x = DIS_ADAPTIVE;
         hd->disconnect = x;
         }
      else if (!strncmp(bp,"period:",7)) {
         bp += 7;
         x = simple_strtoul(bp,NULL,0);
         hd->default_sx_per = sx_table[round_period((unsigned int)x)].period_ns;
         }
      else if (!strncmp(bp,"resync:",7)) {
         bp += 7;
         x = simple_strtoul(bp,NULL,0);
         for (i=0; i<7; i++)
            if (x & (1<<i))
               hd->sync_stat[i] = SS_UNSET;
         }
      else if (!strncmp(bp,"proc:",5)) {
         bp += 5;
         hd->proc = simple_strtoul(bp,NULL,0);
         }
      else if (!strncmp(bp,"nodma:",6)) {
         bp += 6;
         hd->no_dma = simple_strtoul(bp,NULL,0);
         }
      else if (!strncmp(bp,"level2:",7)) {
         bp += 7;
         hd->level2 = simple_strtoul(bp,NULL,0);
         }
      return len;
      }

   save_flags(flags);
   cli();
   bp = buf;
   *bp = '\0';
   if (hd->proc & PR_VERSION) {
      sprintf(tbuf,"\nVersion %s - %s. Compiled %s %s",
            WD33C93_VERSION,WD33C93_DATE,__DATE__,__TIME__);
      strcat(bp,tbuf);
      }
   if (hd->proc & PR_INFO) {
      sprintf(tbuf,"\nclock_freq=%02x no_sync=%02x no_dma=%d",
            hd->clock_freq,hd->no_sync,hd->no_dma);
      strcat(bp,tbuf);
      strcat(bp,"\nsync_xfer[] =       ");
      for (x=0; x<7; x++) {
         sprintf(tbuf,"\t%02x",hd->sync_xfer[x]);
         strcat(bp,tbuf);
         }
      strcat(bp,"\nsync_stat[] =       ");
      for (x=0; x<7; x++) {
         sprintf(tbuf,"\t%02x",hd->sync_stat[x]);
         strcat(bp,tbuf);
         }
      }
#ifdef PROC_STATISTICS
   if (hd->proc & PR_STATISTICS) {
      strcat(bp,"\ncommands issued:    ");
      for (x=0; x<7; x++) {
         sprintf(tbuf,"\t%ld",hd->cmd_cnt[x]);
         strcat(bp,tbuf);
         }
      strcat(bp,"\ndisconnects allowed:");
      for (x=0; x<7; x++) {
         sprintf(tbuf,"\t%ld",hd->disc_allowed_cnt[x]);
         strcat(bp,tbuf);
         }
      strcat(bp,"\ndisconnects done:   ");
      for (x=0; x<7; x++) {
         sprintf(tbuf,"\t%ld",hd->disc_done_cnt[x]);
         strcat(bp,tbuf);
         }
      sprintf(tbuf,"\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO",
            hd->int_cnt,hd->dma_cnt,hd->pio_cnt);
      strcat(bp,tbuf);
      }
#endif
   if (hd->proc & PR_CONNECTED) {
      strcat(bp,"\nconnected:     ");
      if (hd->connected) {
         cmd = (Scsi_Cmnd *)hd->connected;
         sprintf(tbuf," %ld-%d:%d(%02x)",
               cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
         strcat(bp,tbuf);
         }
      }
   if (hd->proc & PR_INPUTQ) {
      strcat(bp,"\ninput_Q:       ");
      cmd = (Scsi_Cmnd *)hd->input_Q;
      while (cmd) {
         sprintf(tbuf," %ld-%d:%d(%02x)",
               cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
         strcat(bp,tbuf);
         cmd = (Scsi_Cmnd *)cmd->host_scribble;
         }
      }
   if (hd->proc & PR_DISCQ) {
      strcat(bp,"\ndisconnected_Q:");
      cmd = (Scsi_Cmnd *)hd->disconnected_Q;
      while (cmd) {
         sprintf(tbuf,"