Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 605 insertions, 0 deletions

diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c
new file mode 100644
index 0000000..d5fd17e
--- /dev/null
+++ b/drivers/scsi/mac_scsi.c
@@ -0,0 +1,605 @@
+/*
+ * Generic Macintosh NCR5380 driver
+ *
+ * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov>
+ *
+ * derived in part from:
+ */
+/*
+ * Generic Generic NCR5380 driver
+ *
+ * Copyright 1995, Russell King
+ *
+ * ALPHA RELEASE 1.
+ *
+ * For more information, please consult
+ *
+ * NCR 5380 Family
+ * SCSI Protocol Controller
+ * Databook
+ *
+ * NCR Microelectronics
+ * 1635 Aeroplaza Drive
+ * Colorado Springs, CO 80916
+ * 1+ (719) 578-3400
+ * 1+ (800) 334-5454
+ */
+
+/*
+ * $Log: mac_NCR5380.c,v $
+ */
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/machw.h>
+#include <asm/mac_via.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "mac_scsi.h"
+#include "NCR5380.h"
+
+#if 0
+#define NDEBUG (NDEBUG_INTR | NDEBUG_PSEUDO_DMA | NDEBUG_ARBITRATION | NDEBUG_SELECTION | NDEBUG_RESELECTION)
+#else
+#define NDEBUG (NDEBUG_ABORT)
+#endif
+
+#define RESET_BOOT
+#define DRIVER_SETUP
+
+#define	ENABLE_IRQ()	mac_enable_irq( IRQ_MAC_SCSI ); 
+#define	DISABLE_IRQ()	mac_disable_irq( IRQ_MAC_SCSI );
+
+extern void via_scsi_clear(void);
+
+#ifdef RESET_BOOT
+static void mac_scsi_reset_boot(struct Scsi_Host *instance);
+#endif
+
+static int setup_called = 0;
+static int setup_can_queue = -1;
+static int setup_cmd_per_lun = -1;
+static int setup_sg_tablesize = -1;
+static int setup_use_pdma = -1;
+#ifdef SUPPORT_TAGS
+static int setup_use_tagged_queuing = -1;
+#endif
+static int setup_hostid = -1;
+
+/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms,
+ * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more
+ * need ten times the standard value... */
+#define TOSHIBA_DELAY
+
+#ifdef TOSHIBA_DELAY
+#define	AFTER_RESET_DELAY	(5*HZ/2)
+#else
+#define	AFTER_RESET_DELAY	(HZ/2)
+#endif
+
+static volatile unsigned char *mac_scsi_regp = NULL;
+static volatile unsigned char *mac_scsi_drq  = NULL;
+static volatile unsigned char *mac_scsi_nodrq = NULL;
+
+
+/*
+ * NCR 5380 register access functions
+ */
+
+#if 0
+/* Debug versions */
+#define CTRL(p,v) (*ctrl = (v))
+
+static char macscsi_read(struct Scsi_Host *instance, int reg)
+{
+  int iobase = instance->io_port;
+  int i;
+  int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl;
+
+  CTRL(iobase, 0);
+  i = in_8(iobase + (reg<<4));
+  CTRL(iobase, 0x40);
+
+  return i;
+}
+
+static void macscsi_write(struct Scsi_Host *instance, int reg, int value)
+{
+  int iobase = instance->io_port;
+  int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl;
+
+  CTRL(iobase, 0);
+  out_8(iobase + (reg<<4), value);
+  CTRL(iobase, 0x40);
+}
+#else
+
+/* Fast versions */
+static __inline__ char macscsi_read(struct Scsi_Host *instance, int reg)
+{
+  return in_8(instance->io_port + (reg<<4));
+}
+
+static __inline__ void macscsi_write(struct Scsi_Host *instance, int reg, int value)
+{
+  out_8(instance->io_port + (reg<<4), value);
+}
+#endif
+
+
+/*
+ * Function : mac_scsi_setup(char *str)
+ *
+ * Purpose : booter command line initialization of the overrides array,
+ *
+ * Inputs : str - comma delimited list of options
+ *
+ */
+
+static int __init mac_scsi_setup(char *str) {
+#ifdef DRIVER_SETUP	
+	int ints[7];
+	
+	(void)get_options( str, ARRAY_SIZE(ints), ints);
+	
+	if (setup_called++ || ints[0] < 1 || ints[0] > 6) {
+	    printk(KERN_WARNING "scsi: <mac5380>"
+		" Usage: mac5380=<can_queue>[,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>,<use_pdma>]\n");
+	    printk(KERN_ALERT "scsi: <mac5380> Bad Penguin parameters?\n");
+	    return 0;
+	}
+	    
+	if (ints[0] >= 1) {
+		if (ints[1] > 0)
+			/* no limits on this, just > 0 */
+			setup_can_queue = ints[1];
+	}
+	if (ints[0] >= 2) {
+		if (ints[2] > 0)
+			setup_cmd_per_lun = ints[2];
+	}
+	if (ints[0] >= 3) {
+		if (ints[3] >= 0) {
+			setup_sg_tablesize = ints[3];
+			/* Must be <= SG_ALL (255) */
+			if (setup_sg_tablesize > SG_ALL)
+				setup_sg_tablesize = SG_ALL;
+		}
+	}
+	if (ints[0] >= 4) {
+		/* Must be between 0 and 7 */
+		if (ints[4] >= 0 && ints[4] <= 7)
+			setup_hostid = ints[4];
+		else if (ints[4] > 7)
+			printk(KERN_WARNING "mac_scsi_setup: invalid host ID %d !\n", ints[4] );
+	}
+#ifdef SUPPORT_TAGS	
+	if (ints[0] >= 5) {
+		if (ints[5] >= 0)
+			setup_use_tagged_queuing = !!ints[5];
+	}
+	
+	if (ints[0] == 6) {
+	    if (ints[6] >= 0)
+		setup_use_pdma = ints[6];
+	}
+#else
+	if (ints[0] == 5) {
+	    if (ints[5] >= 0)
+		setup_use_pdma = ints[5];
+	}
+#endif /* SUPPORT_TAGS */
+	
+#endif /* DRIVER_SETUP */
+	return 1;
+}
+
+__setup("mac5380=", mac_scsi_setup);
+
+/*
+ * If you want to find the instance with (k)gdb ...
+ */
+#if NDEBUG
+static struct Scsi_Host *default_instance;
+#endif
+
+/*
+ * Function : int macscsi_detect(Scsi_Host_Template * tpnt)
+ *
+ * Purpose : initializes mac NCR5380 driver based on the
+ *	command line / compile time port and irq definitions.
+ *
+ * Inputs : tpnt - template for this SCSI adapter.
+ *
+ * Returns : 1 if a host adapter was found, 0 if not.
+ *
+ */
+ 
+int macscsi_detect(Scsi_Host_Template * tpnt)
+{
+    static int called = 0;
+    int flags = 0;
+    struct Scsi_Host *instance;
+
+    if (!MACH_IS_MAC || called)
+	return( 0 );
+
+    if (macintosh_config->scsi_type != MAC_SCSI_OLD)
+	return( 0 );
+
+    /* setup variables */
+    tpnt->can_queue =
+	(setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;
+    tpnt->cmd_per_lun =
+	(setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;
+    tpnt->sg_tablesize = 
+	(setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;
+
+    if (setup_hostid >= 0)
+	tpnt->this_id = setup_hostid;
+    else {
+	/* use 7 as default */
+	tpnt->this_id = 7;
+    }
+
+#ifdef SUPPORT_TAGS
+    if (setup_use_tagged_queuing < 0)
+	setup_use_tagged_queuing = USE_TAGGED_QUEUING;
+#endif
+
+    /* Once we support multiple 5380s (e.g. DuoDock) we'll do
+       something different here */
+    instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+#if NDEBUG
+    default_instance = instance;
+#endif
+    
+    if (macintosh_config->ident == MAC_MODEL_IIFX) {
+	mac_scsi_regp  = via1+0x8000;
+	mac_scsi_drq   = via1+0xE000;
+	mac_scsi_nodrq = via1+0xC000;
+	/* The IIFX should be able to do true DMA, but pseudo-dma doesn't work */
+	flags = FLAG_NO_PSEUDO_DMA;
+    } else {
+	mac_scsi_regp  = via1+0x10000;
+	mac_scsi_drq   = via1+0x6000;
+	mac_scsi_nodrq = via1+0x12000;
+    }
+
+    if (! setup_use_pdma)
+	flags = FLAG_NO_PSEUDO_DMA;
+	
+    instance->io_port = (unsigned long) mac_scsi_regp;
+    instance->irq = IRQ_MAC_SCSI;
+
+#ifdef RESET_BOOT   
+    mac_scsi_reset_boot(instance);
+#endif
+    
+    NCR5380_init(instance, flags);
+
+    instance->n_io_port = 255;
+
+    ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
+
+    if (instance->irq != SCSI_IRQ_NONE)
+	if (request_irq(instance->irq, NCR5380_intr, IRQ_FLG_SLOW, 
+		"ncr5380", instance)) {
+	    printk(KERN_WARNING "scsi%d: IRQ%d not free, interrupts disabled\n",
+		   instance->host_no, instance->irq);
+	    instance->irq = SCSI_IRQ_NONE;
+	}
+
+    printk(KERN_INFO "scsi%d: generic 5380 at port %lX irq", instance->host_no, instance->io_port);
+    if (instance->irq == SCSI_IRQ_NONE)
+	printk (KERN_INFO "s disabled");
+    else
+	printk (KERN_INFO " %d", instance->irq);
+    printk(KERN_INFO " options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
+	   instance->can_queue, instance->cmd_per_lun, MACSCSI_PUBLIC_RELEASE);
+    printk(KERN_INFO "\nscsi%d:", instance->host_no);
+    NCR5380_print_options(instance);
+    printk("\n");
+    called = 1;
+    return 1;
+}
+
+int macscsi_release (struct Scsi_Host *shpnt)
+{
+	if (shpnt->irq != SCSI_IRQ_NONE)
+		free_irq (shpnt->irq, NCR5380_intr);
+	NCR5380_exit(shpnt);
+
+	return 0;
+}
+
+#ifdef RESET_BOOT
+/*
+ * Our 'bus reset on boot' function
+ */
+
+static void mac_scsi_reset_boot(struct Scsi_Host *instance)
+{
+	unsigned long end;
+
+	NCR5380_local_declare();
+	NCR5380_setup(instance);
+	
+	/*
+	 * Do a SCSI reset to clean up the bus during initialization. No messing
+	 * with the queues, interrupts, or locks necessary here.
+	 */
+
+	printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." );
+
+	/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
+	mac_disable_irq(IRQ_MAC_SCSI);
+
+	/* get in phase */
+	NCR5380_write( TARGET_COMMAND_REG,
+		      PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
+
+	/* assert RST */
+	NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
+	/* The min. reset hold time is 25us, so 40us should be enough */
+	udelay( 50 );
+	/* reset RST and interrupt */
+	NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
+	NCR5380_read( RESET_PARITY_INTERRUPT_REG );
+
+	for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
+		barrier();
+
+	/* switch on SCSI IRQ again */
+	mac_enable_irq(IRQ_MAC_SCSI);
+
+	printk(KERN_INFO " done\n" );
+}
+#endif
+
+const char * macscsi_info (struct Scsi_Host *spnt) {
+	return "";
+}
+
+/* 
+   Pseudo-DMA: (Ove Edlund)
+   The code attempts to catch bus errors that occur if one for example
+   "trips over the cable".
+   XXX: Since bus errors in the PDMA routines never happen on my 
+   computer, the bus error code is untested. 
+   If the code works as intended, a bus error results in Pseudo-DMA 
+   beeing disabled, meaning that the driver switches to slow handshake. 
+   If bus errors are NOT extremely rare, this has to be changed. 
+*/
+
+#define CP_IO_TO_MEM(s,d,len)				\
+__asm__ __volatile__					\
+    ("    cmp.w  #4,%2\n"				\
+     "    bls    8f\n"					\
+     "    move.w %1,%%d0\n"				\
+     "    neg.b  %%d0\n"				\
+     "    and.w  #3,%%d0\n"				\
+     "    sub.w  %%d0,%2\n"				\
+     "    bra    2f\n"					\
+     " 1: move.b (%0),(%1)+\n"				\
+     " 2: dbf    %%d0,1b\n"				\
+     "    move.w %2,%%d0\n"				\
+     "    lsr.w  #5,%%d0\n"				\
+     "    bra    4f\n"					\
+     " 3: move.l (%0),(%1)+\n"				\
+     "31: move.l (%0),(%1)+\n"				\
+     "32: move.l (%0),(%1)+\n"				\
+     "33: move.l (%0),(%1)+\n"				\
+     "34: move.l (%0),(%1)+\n"				\
+     "35: move.l (%0),(%1)+\n"				\
+     "36: move.l (%0),(%1)+\n"				\
+     "37: move.l (%0),(%1)+\n"				\
+     " 4: dbf    %%d0,3b\n"				\
+     "    move.w %2,%%d0\n"				\
+     "    lsr.w  #2,%%d0\n"				\
+     "    and.w  #7,%%d0\n"				\
+     "    bra    6f\n"					\
+     " 5: move.l (%0),(%1)+\n"				\
+     " 6: dbf    %%d0,5b\n"				\
+     "    and.w  #3,%2\n"				\
+     "    bra    8f\n"					\
+     " 7: move.b (%0),(%1)+\n"				\
+     " 8: dbf    %2,7b\n"				\
+     "    moveq.l #0, %2\n"				\
+     " 9: \n"						\
+     ".section .fixup,\"ax\"\n"				\
+     "    .even\n"					\
+     "90: moveq.l #1, %2\n"				\
+     "    jra 9b\n"					\
+     ".previous\n"					\
+     ".section __ex_table,\"a\"\n"			\
+     "   .align 4\n"					\
+     "   .long  1b,90b\n"				\
+     "   .long  3b,90b\n"				\
+     "   .long 31b,90b\n"				\
+     "   .long 32b,90b\n"				\
+     "   .long 33b,90b\n"				\
+     "   .long 34b,90b\n"				\
+     "   .long 35b,90b\n"				\
+     "   .long 36b,90b\n"				\
+     "   .long 37b,90b\n"				\
+     "   .long  5b,90b\n"				\
+     "   .long  7b,90b\n"				\
+     ".previous"					\
+     : "=a"(s), "=a"(d), "=d"(len)			\
+     : "0"(s), "1"(d), "2"(len)				\
+     : "d0")
+
+
+static int macscsi_pread (struct Scsi_Host *instance,
+			  unsigned char *dst, int len)
+{
+   unsigned char *d;
+   volatile unsigned char *s;
+
+   NCR5380_local_declare();
+   NCR5380_setup(instance);
+
+   s = mac_scsi_drq+0x60;
+   d = dst;
+
+/* These conditions are derived from MacOS */
+
+   while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 
+         && !(NCR5380_read(STATUS_REG) & SR_REQ))
+      ;
+   if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 
+         && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) {
+      printk(KERN_ERR "Error in macscsi_pread\n");
+      return -1;
+   }
+
+   CP_IO_TO_MEM(s, d, len);
+   
+   if (len != 0) {
+      printk(KERN_NOTICE "Bus error in macscsi_pread\n");
+      return -1;
+   }
+   
+   return 0;
+}
+
+
+#define CP_MEM_TO_IO(s,d,len)				\
+__asm__ __volatile__					\
+    ("    cmp.w  #4,%2\n"				\
+     "    bls    8f\n"					\
+     "    move.w %0,%%d0\n"				\
+     "    neg.b  %%d0\n"				\
+     "    and.w  #3,%%d0\n"				\
+     "    sub.w  %%d0,%2\n"				\
+     "    bra    2f\n"					\
+     " 1: move.b (%0)+,(%1)\n"				\
+     " 2: dbf    %%d0,1b\n"				\
+     "    move.w %2,%%d0\n"				\
+     "    lsr.w  #5,%%d0\n"				\
+     "    bra    4f\n"					\
+     " 3: move.l (%0)+,(%1)\n"				\
+     "31: move.l (%0)+,(%1)\n"				\
+     "32: move.l (%0)+,(%1)\n"				\
+     "33: move.l (%0)+,(%1)\n"				\
+     "34: move.l (%0)+,(%1)\n"				\
+     "35: move.l (%0)+,(%1)\n"				\
+     "36: move.l (%0)+,(%1)\n"				\
+     "37: move.l (%0)+,(%1)\n"				\
+     " 4: dbf    %%d0,3b\n"				\
+     "    move.w %2,%%d0\n"				\
+     "    lsr.w  #2,%%d0\n"				\
+     "    and.w  #7,%%d0\n"				\
+     "    bra    6f\n"					\
+     " 5: move.l (%0)+,(%1)\n"				\
+     " 6: dbf    %%d0,5b\n"				\
+     "    and.w  #3,%2\n"				\
+     "    bra    8f\n"					\
+     " 7: move.b (%0)+,(%1)\n"				\
+     " 8: dbf    %2,7b\n"				\
+     "    moveq.l #0, %2\n"				\
+     " 9: \n"						\
+     ".section .fixup,\"ax\"\n"				\
+     "    .even\n"					\
+     "90: moveq.l #1, %2\n"				\
+     "    jra 9b\n"					\
+     ".previous\n"					\
+     ".section __ex_table,\"a\"\n"			\
+     "   .align 4\n"					\
+     "   .long  1b,90b\n"				\
+     "   .long  3b,90b\n"				\
+     "   .long 31b,90b\n"				\
+     "   .long 32b,90b\n"				\
+     "   .long 33b,90b\n"				\
+     "   .long 34b,90b\n"				\
+     "   .long 35b,90b\n"				\
+     "   .long 36b,90b\n"				\
+     "   .long 37b,90b\n"				\
+     "   .long  5b,90b\n"				\
+     "   .long  7b,90b\n"				\
+     ".previous"					\
+     : "=a"(s), "=a"(d), "=d"(len)			\
+     : "0"(s), "1"(d), "2"(len)				\
+     : "d0")
+
+static int macscsi_pwrite (struct Scsi_Host *instance,
+				  unsigned char *src, int len)
+{
+   unsigned char *s;
+   volatile unsigned char *d;
+
+   NCR5380_local_declare();
+   NCR5380_setup(instance);
+
+   s = src;
+   d = mac_scsi_drq;
+   
+/* These conditions are derived from MacOS */
+
+   while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 
+         && (!(NCR5380_read(STATUS_REG) & SR_REQ) 
+            || (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) 
+      ;
+   if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) {
+      printk(KERN_ERR "Error in macscsi_pwrite\n");
+      return -1;
+   }
+
+   CP_MEM_TO_IO(s, d, len);   
+
+   if (len != 0) {
+      printk(KERN_NOTICE "Bus error in macscsi_pwrite\n");
+      return -1;
+   }
+   
+   return 0;
+}
+
+
+/* These control the behaviour of the generic 5380 core */
+#define AUTOSENSE
+#define PSEUDO_DMA
+
+#include "NCR5380.c"
+
+static Scsi_Host_Template driver_template = {
+	.proc_name			= "Mac5380",
+	.proc_info			= macscsi_proc_info,
+	.name				= "Macintosh NCR5380 SCSI",
+	.detect				= macscsi_detect,
+	.release			= macscsi_release,
+	.info				= macscsi_info,
+	.queuecommand			= macscsi_queue_command,
+	.eh_abort_handler		= macscsi_abort,
+	.eh_bus_reset_handler		= macscsi_bus_reset,
+	.eh_device_reset_handler	= macscsi_device_reset,
+	.eh_host_reset_handler		= macscsi_host_reset,
+	.can_queue			= CAN_QUEUE,
+	.this_id			= 7,
+	.sg_tablesize			= SG_ALL,
+	.cmd_per_lun			= CMD_PER_LUN,
+	.unchecked_isa_dma		= 0,
+	.use_clustering			= DISABLE_CLUSTERING
+};
+
+
+#include "scsi_module.c"