patch-2.1.88 linux/drivers/acorn/scsi/cumana_2.c

• Lines: 379
• Date: Sun Feb 15 08:58:11 1998
• Orig file: v2.1.87/linux/drivers/acorn/scsi/cumana_2.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.87/linux/drivers/acorn/scsi/cumana_2.c linux/drivers/acorn/scsi/cumana_2.c
@@ -0,0 +1,378 @@
+/*
+ * linux/arch/arm/drivers/scsi/cumana_2.c
+ *
+ * Copyright (C) 1997,1998 Russell King
+ *
+ * This driver is based on experimentation.  Hence, it may have made
+ * assumptions about the particular card that I have available, and
+ * may not be reliable!
+ *
+ * Changelog:
+ *  30-08-1997	RMK	0.0.0	Created, READONLY version
+ *  22-01-1998	RMK	0.0.1	Updated to 2.1.80
+ */
+
+#include <linux/module.h>
+#include <linux/blk.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/unistd.h>
+#include <linux/stat.h>
+
+#include <asm/delay.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ecard.h>
+
+#include "../../scsi/sd.h"
+#include "../../scsi/hosts.h"
+#include "cumana_2.h"
+#include "fas216.h"
+
+/* Hmm - this should go somewhere else */
+#define BUS_ADDR(x) ((((unsigned long)(x)) << 2) + IO_BASE)
+
+/* Configuration */
+#define XTALFREQ		40
+#define INT_POLARITY		CTRL_INT_HIGH
+
+/*
+ * List of devices that the driver will recognise
+ */
+#define CUMANASCSI2_LIST	{ MANU_CUMANA, PROD_CUMANA_SCSI_2 }
+
+/*
+ * Version
+ */
+#define VER_MAJOR	0
+#define VER_MINOR	0
+#define VER_PATCH	1
+
+static struct expansion_card *ecs[MAX_ECARDS];
+
+static struct proc_dir_entry proc_scsi_cumanascsi_2 = {
+	PROC_SCSI_QLOGICFAS, 6, "cumanascs2",
+	S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+/*
+ * Function: void cumanascsi_2_intr (int irq, void *dev_id, struct pt_regs *regs)
+ * Purpose : handle interrupts from Cumana SCSI 2 card
+ * Params  : irq - interrupt number
+ *	     dev_id - user-defined (Scsi_Host structure)
+ *	     regs - processor registers at interrupt
+ */
+static void cumanascsi_2_intr (int irq, void *dev_id, struct pt_regs *regs)
+{
+    struct Scsi_Host *instance = (struct Scsi_Host *)dev_id;
+
+    fas216_intr (instance);
+}
+
+/*
+ * Function: int cumanascsi_2_dma_setup (instance, SCpnt, direction)
+ * Purpose : initialises DMA/PIO
+ * Params  : instance  - host
+ *	     SCpnt     - command
+ *	     direction - DMA on to/off of card
+ * Returns : 0 if we should not set CMD_WITHDMA for transfer info command
+ */
+static fasdmatype_t cumanascsi_2_dma_setup (struct Scsi_Host *instance, Scsi_Pointer *SCp, fasdmadir_t direction)
+{
+    /*
+     * We don't do DMA
+     */
+    return fasdma_pseudo;
+}
+
+/*
+ * Function: int cumanascsi_2_dma_pseudo (instance, SCpnt, direction, transfer)
+ * Purpose : handles pseudo DMA
+ * Params  : instance  - host
+ *	     SCpnt     - command
+ *	     direction - DMA on to/off of card
+ *	     transfer  - minimum number of bytes we expect to transfer
+ * Returns : bytes transfered
+ */
+static int
+cumanascsi_2_dma_pseudo (struct Scsi_Host *instance, Scsi_Pointer *SCp,
+			 fasdmadir_t direction, int transfer)
+{
+    CumanaScsi2_Info *info = (CumanaScsi2_Info *)instance->hostdata;
+    unsigned int length;
+    unsigned char *addr;
+
+    length = SCp->this_residual;
+    addr = SCp->ptr;
+
+    if (direction == DMA_OUT)
+#if 0
+	while (length > 1) {
+	    unsigned long word;
+
+
+	    if (inb (REG0_STATUS(&info->info)) & STATUS_INT)
+		goto end;
+
+	    if (!(inb (info->cstatus) & CSTATUS_DRQ))
+		continue;
+
+	    word = *addr | (*addr + 1) << 8;
+	    outw (info->dmaarea);
+	    addr += 2;
+	    length -= 2;
+	}
+#else
+	printk ("PSEUDO_OUT???\n");
+#endif
+    else {
+	if (transfer && (transfer & 255)) {
+	    while (length >= 256) {
+		if (inb (REG0_STATUS(&info->info)) & STATUS_INT)
+		    goto end;
+	    
+		if (!(inb (info->cstatus) & CSTATUS_DRQ))
+		    continue;
+
+		insw (info->dmaarea, addr, 256 >> 1);
+		addr += 256;
+		length -= 256;
+	    }
+	}
+
+	while (length > 0) {
+	    unsigned long word;
+
+	    if (inb (REG0_STATUS(&info->info)) & STATUS_INT)
+		goto end;
+	    
+	    if (!(inb (info->cstatus) & CSTATUS_DRQ))
+		continue;
+
+	    word = inw (info->dmaarea);
+	    *addr++ = word;
+	    if (--length > 0) {
+		*addr++ = word >> 8;
+		length --;
+	    }
+	}
+    }
+
+end:
+    return SCp->this_residual - length;
+}
+
+/*
+ * Function: int cumanascsi_2_dma_stop (instance, SCpnt)
+ * Purpose : stops DMA/PIO
+ * Params  : instance  - host
+ *	     SCpnt     - command
+ */
+static void cumanascsi_2_dma_stop (struct Scsi_Host *instance, Scsi_Pointer *SCp)
+{
+    /*
+     * no DMA to stop
+     */
+}
+
+/*
+ * Function: 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 *instance;
+  
+    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]);
+
+	instance = scsi_register (tpnt, sizeof (CumanaScsi2_Info));
+	if (!instance) {
+	    ecard_release (ecs[count]);
+	    break;
+	}
+
+	instance->io_port = ecard_address (ecs[count], ECARD_MEMC, 0);
+	instance->irq = ecs[count]->irq;
+
+	ecs[count]->irqaddr = (unsigned char *)BUS_ADDR(instance->io_port);
+	ecs[count]->irqmask = CSTATUS_IRQ;
+
+	request_region (instance->io_port      ,  1, "cumanascsi2-stat");
+	request_region (instance->io_port + 128, 64, "cumanascsi2-dma");
+	request_region (instance->io_port + 192, 16, "cumanascsi2-fas");
+	if (request_irq (instance->irq, cumanascsi_2_intr, SA_INTERRUPT, "cumanascsi2", instance)) {
+	    printk ("scsi%d: IRQ%d not free, interrupts disabled\n",
+		      instance->host_no, instance->irq);
+	}
+
+	info = (CumanaScsi2_Info *)instance->hostdata;
+	info->info.scsi.io_port	= instance->io_port + 192;
+	info->info.scsi.irq	= instance->irq;
+	info->info.ifcfg.clockrate = XTALFREQ;
+	info->info.ifcfg.select_timeout = 255;
+	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		= instance->io_port + 128;
+	info->cstatus		= instance->io_port;
+
+	fas216_init (instance);
+	++count;
+    }
+    return count;
+}
+
+/*
+ * Function: 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.
+ * Returns : nothing
+ */
+int cumanascsi_2_release (struct Scsi_Host *instance)
+{
+    int i;
+
+    fas216_release (instance);
+
+    if (instance->irq != 255)
+	free_irq (instance->irq, instance);
+    release_region (instance->io_port, 1);
+    release_region (instance->io_port + 128, 32);
+    release_region (instance->io_port + 192, 16);
+
+    for (i = 0; i < MAX_ECARDS; i++)
+	if (ecs[i] && instance->io_port == ecard_address (ecs[i], ECARD_MEMC, 0))
+		ecard_release (ecs[i]);
+    return 0;
+}
+
+/*
+ * Function: 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 irq %d v%d.%d.%d scsi %s",
+		  host->hostt->name, host->io_port, host->irq,
+		  VER_MAJOR, VER_MINOR, VER_PATCH,
+		  info->info.scsi.type);
+
+    return string;
+}
+
+/*
+ * Function: 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;
+    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;
+
+    info = (CumanaScsi2_Info *)host->hostdata;
+    if (inout == 1)
+      return -EINVAL;
+
+    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\n"
+			"FAS    : %s\n\n"
+			"Statistics:\n",
+			host->io_port, host->irq, info->info.scsi.type);
+
+    pos += sprintf (buffer+pos,
+			"Queued commands: %-10ld   Issued commands: %-10ld\n"
+			"Done commands  : %-10ld   Reads          : %-10ld\n"
+			"Writes         : %-10ld   Others         : %-10ld\n"
+			"Disconnects    : %-10ld   Aborts         : %-10ld\n"
+			"Resets         : %-10ld\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);
+
+    pos += sprintf (buffer+pos, "\nAttached devices:%s\n", host->host_queue ? "" : " none");
+
+    for (scd = host->host_queue; scd; scd = scd->next) {
+	int len;
+
+	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/scsi_module.c"
+#endif