cumana_2.c

arm平台上的uclinux系统全部源代码

	}

end:
}

/* Prototype: int cumanascsi_2_dma_stop(host, SCpnt)
 * Purpose  : stops DMA/PIO
 * Params   : host  - host
 *	      SCpnt - command
 */
static void
cumanascsi_2_dma_stop(struct Scsi_Host *host, Scsi_Pointer *SCp)
{
	CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata;
	if (host->dma_channel != NO_DMA) {
		outb(ALATCH_DIS_DMA, info->alatch);
		disable_dma(host->dma_channel);
	}
}

/* Prototype: int cumanascsi_2_detect(Scsi_Host_Template * tpnt)
 * Purpose  : initialises Cumana SCSI 2 driver
 * Params   : tpnt - template for this SCSI adapter
 * Returns  : >0 if host found, 0 otherwise.
 */
int
cumanascsi_2_detect(Scsi_Host_Template *tpnt)
{
	static const card_ids cumanascsi_2_cids[] =
			{ CUMANASCSI2_LIST, { 0xffff, 0xffff} };
	int count = 0;
	struct Scsi_Host *host;
  
	tpnt->proc_dir = &proc_scsi_cumanascsi_2;
	memset(ecs, 0, sizeof (ecs));

	ecard_startfind();

	while (1) {
	    	CumanaScsi2_Info *info;

		ecs[count] = ecard_find(0, cumanascsi_2_cids);
		if (!ecs[count])
			break;

		ecard_claim(ecs[count]);

		host = scsi_register(tpnt, sizeof (CumanaScsi2_Info));
		if (!host) {
			ecard_release(ecs[count]);
			break;
		}

		host->io_port = ecard_address(ecs[count], ECARD_MEMC, 0);
		host->irq = ecs[count]->irq;
		host->dma_channel = ecs[count]->dma;
		info = (CumanaScsi2_Info *)host->hostdata;

		info->terms			= term[count] ? 1 : 0;
		cumanascsi_2_terminator_ctl(host, info->terms);

		info->info.scsi.io_port		= host->io_port + CUMANASCSI2_FAS216_OFFSET;
		info->info.scsi.io_shift	= CUMANASCSI2_FAS216_SHIFT;
		info->info.scsi.irq		= host->irq;
		info->info.ifcfg.clockrate	= CUMANASCSI2_XTALFREQ;
		info->info.ifcfg.select_timeout	= 255;
		info->info.ifcfg.asyncperiod	= CUMANASCSI2_ASYNC_PERIOD;
		info->info.ifcfg.sync_max_depth	= CUMANASCSI2_SYNC_DEPTH;
		info->info.ifcfg.cntl3		= CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
		info->info.ifcfg.disconnect_ok	= 1;
		info->info.ifcfg.wide_max_size	= 0;
		info->info.dma.setup		= cumanascsi_2_dma_setup;
		info->info.dma.pseudo		= cumanascsi_2_dma_pseudo;
		info->info.dma.stop		= cumanascsi_2_dma_stop;
		info->dmaarea			= host->io_port + CUMANASCSI2_PSEUDODMA;
		info->status			= host->io_port + CUMANASCSI2_STATUS;
		info->alatch			= host->io_port + CUMANASCSI2_ALATCH;

		ecs[count]->irqaddr	= (unsigned char *)ioaddr(info->status);
		ecs[count]->irqmask	= STATUS_INT;
		ecs[count]->irq_data	= (void *)info->alatch;
		ecs[count]->ops		= (expansioncard_ops_t *)&cumanascsi_2_ops;

		request_region(host->io_port + CUMANASCSI2_FAS216_OFFSET,
			       16 << CUMANASCSI2_FAS216_SHIFT, "cumanascsi2-fas");

		if (host->irq != NO_IRQ &&
		    request_irq(host->irq, cumanascsi_2_intr,
				SA_INTERRUPT, "cumanascsi2", host)) {
			printk("scsi%d: IRQ%d not free, interrupts disabled\n",
			       host->host_no, host->irq);
			host->irq = NO_IRQ;
			info->info.scsi.irq = NO_IRQ;
		}

		if (host->dma_channel != NO_DMA &&
		    request_dma(host->dma_channel, "cumanascsi2")) {
			printk("scsi%d: DMA%d not free, DMA disabled\n",
			       host->host_no, host->dma_channel);
			host->dma_channel = NO_DMA;
		}

		fas216_init(host);
		++count;
	}
	return count;
}

/* Prototype: int cumanascsi_2_release(struct Scsi_Host * host)
 * Purpose  : releases all resources used by this adapter
 * Params   : host - driver host structure to return info for.
 */
int cumanascsi_2_release(struct Scsi_Host *host)
{
	int i;

	fas216_release(host);

	if (host->irq != NO_IRQ)
		free_irq(host->irq, host);
	if (host->dma_channel != NO_DMA)
		free_dma(host->dma_channel);
	release_region(host->io_port + CUMANASCSI2_FAS216_OFFSET,
		       16 << CUMANASCSI2_FAS216_SHIFT);

	for (i = 0; i < MAX_ECARDS; i++)
		if (ecs[i] && host->io_port == ecard_address (ecs[i], ECARD_MEMC, 0))
			ecard_release (ecs[i]);
	return 0;
}

/* Prototype: const char *cumanascsi_2_info(struct Scsi_Host * host)
 * Purpose  : returns a descriptive string about this interface,
 * Params   : host - driver host structure to return info for.
 * Returns  : pointer to a static buffer containing null terminated string.
 */
const char *cumanascsi_2_info(struct Scsi_Host *host)
{
	CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata;
	static char string[100], *p;

	p = string;
	p += sprintf(string, "%s at port %X ",
		     host->hostt->name, host->io_port);

	if (host->irq != NO_IRQ)
		p += sprintf(p, "irq %d ", host->irq);
	else
		p += sprintf(p, "NO IRQ ");

	if (host->dma_channel != NO_DMA)
		p += sprintf(p, "dma %d ", host->dma_channel);
	else
		p += sprintf(p, "NO DMA ");

	p += sprintf(p, "v%d.%d.%d scsi %s",
		     VER_MAJOR, VER_MINOR, VER_PATCH,
		     info->info.scsi.type);

	p += sprintf(p, " terminators %s",
		     info->terms ? "on" : "off");

	return string;
}

/* Prototype: int cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
 * Purpose  : Set a driver specific function
 * Params   : host   - host to setup
 *          : buffer - buffer containing string describing operation
 *          : length - length of string
 * Returns  : -EINVAL, or 0
 */
static int
cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
{
	int ret = length;

	if (length >= 11 && strcmp(buffer, "CUMANASCSI2") == 0) {
		buffer += 11;
		length -= 11;

		if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
			if (buffer[5] == '1')
				cumanascsi_2_terminator_ctl(host, 1);
			else if (buffer[5] == '0')
				cumanascsi_2_terminator_ctl(host, 0);
			else
				ret = -EINVAL;
		} else
			ret = -EINVAL;
	} else
		ret = -EINVAL;

	return ret;
}

/* Prototype: int cumanascsi_2_proc_info(char *buffer, char **start, off_t offset,
 *					 int length, int host_no, int inout)
 * Purpose  : Return information about the driver to a user process accessing
 *	      the /proc filesystem.
 * Params   : buffer - a buffer to write information to
 *	      start  - a pointer into this buffer set by this routine to the start
 *		       of the required information.
 *	      offset - offset into information that we have read upto.
 *	      length - length of buffer
 *	      host_no - host number to return information for
 *	      inout  - 0 for reading, 1 for writing.
 * Returns  : length of data written to buffer.
 */
int cumanascsi_2_proc_info (char *buffer, char **start, off_t offset,
			    int length, int host_no, int inout)
{
	int pos, begin, first;
	struct Scsi_Host *host = scsi_hostlist;
	CumanaScsi2_Info *info;
	Scsi_Device *scd;

	while (host) {
		if (host->host_no == host_no)
			break;
		host = host->next;
	}
	if (!host)
		return 0;

	if (inout == 1)
		return cumanascsi_2_set_proc_info(host, buffer, length);

	info = (CumanaScsi2_Info *)host->hostdata;

	begin = 0;
	pos = sprintf(buffer,
			"Cumana SCSI II driver version %d.%d.%d\n",
			VER_MAJOR, VER_MINOR, VER_PATCH);
	pos += sprintf(buffer + pos,
			"Address: %08X    IRQ : %d     DMA : %d\n"
			"FAS    : %-10s  TERM: %-3s\n\n"
			"Statistics:\n",
			host->io_port, host->irq, host->dma_channel,
			info->info.scsi.type, info->terms ? "on" : "off");

	pos += sprintf(buffer+pos,
			"Queued commands: %-10u   Issued commands: %-10u\n"
			"Done commands  : %-10u   Reads          : %-10u\n"
			"Writes         : %-10u   Others         : %-10u\n"
			"Disconnects    : %-10u   Aborts         : %-10u\n"
			"Resets         : %-10u\n",
			info->info.stats.queues,      info->info.stats.removes,
			info->info.stats.fins,        info->info.stats.reads,
			info->info.stats.writes,      info->info.stats.miscs,
			info->info.stats.disconnects, info->info.stats.aborts,
			info->info.stats.resets);

	first = 1;
	for (scd = scsi_devices; scd; scd = scd->next) {
		if (scd->host == host) {
			int len;

			if (first) {
				pos += sprintf(buffer+pos,
					       "\nAttached devices:\n");
				first = 0;
			}

			proc_print_scsidevice(scd, buffer, &len, pos);
			pos += len;
			pos += sprintf(buffer+pos, "Extensions: ");
			if (scd->tagged_supported)
				pos += sprintf(buffer+pos, "TAG %sabled [%d] ",
					       scd->tagged_queue ? "en" : "dis",
					       scd->current_tag);
			pos += sprintf(buffer+pos, "\n");

			if (pos + begin < offset) {
				begin += pos;
				pos = 0;
			}
			if (pos + begin > offset + length)
				break;
		}
	}

	*start = buffer + (offset - begin);
	pos -= offset - begin;
	if (pos > length)
		pos = length;

	return pos;
}

#ifdef MODULE
Scsi_Host_Template driver_template = CUMANASCSI_2;

#include "scsi_module.c"
#endif