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, 449 insertions, 0 deletions

diff --git a/drivers/scsi/t128.c b/drivers/scsi/t128.c
new file mode 100644
index 000000000000..6dc2897672a1
--- /dev/null
+++ b/drivers/scsi/t128.c
@@ -0,0 +1,449 @@
+#define AUTOSENSE
+#define PSEUDO_DMA
+
+/*
+ * Trantor T128/T128F/T228 driver
+ *	Note : architecturally, the T100 and T130 are different and won't 
+ * 	work
+ *
+ * Copyright 1993, Drew Eckhardt
+ *	Visionary Computing
+ *	(Unix and Linux consulting and custom programming)
+ *	drew@colorado.edu
+ *      +1 (303) 440-4894
+ *
+ * DISTRIBUTION RELEASE 3.
+ *
+ * For more information, please consult 
+ *
+ * Trantor Systems, Ltd.
+ * T128/T128F/T228 SCSI Host Adapter
+ * Hardware Specifications
+ * 
+ * Trantor Systems, Ltd. 
+ * 5415 Randall Place
+ * Fremont, CA 94538
+ * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
+ * 
+ * and 
+ *
+ * NCR 5380 Family
+ * SCSI Protocol Controller
+ * Databook
+ *
+ * NCR Microelectronics
+ * 1635 Aeroplaza Drive
+ * Colorado Springs, CO 80916
+ * 1+ (719) 578-3400
+ * 1+ (800) 334-5454
+ */
+
+/*
+ * Options : 
+ * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
+ *      for commands that return with a CHECK CONDITION status. 
+ *
+ * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
+ * increase compared to polled I/O.
+ *
+ * PARITY - enable parity checking.  Not supported.
+ * 
+ * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
+ *
+ *
+ * UNSAFE - leave interrupts enabled during pseudo-DMA transfers.  You
+ *          only really want to use this if you're having a problem with
+ *          dropped characters during high speed communications, and even
+ *          then, you're going to be better off twiddling with transfersize.
+ *
+ * USLEEP - enable support for devices that don't disconnect.  Untested.
+ *
+ * The card is detected and initialized in one of several ways : 
+ * 1.  Autoprobe (default) - since the board is memory mapped, 
+ *     a BIOS signature is scanned for to locate the registers.
+ *     An interrupt is triggered to autoprobe for the interrupt
+ *     line.
+ *
+ * 2.  With command line overrides - t128=address,irq may be 
+ *     used on the LILO command line to override the defaults.
+ *
+ * 3.  With the T128_OVERRIDE compile time define.  This is 
+ *     specified as an array of address, irq tuples.  Ie, for
+ *     one board at the default 0xcc000 address, IRQ5, I could say 
+ *     -DT128_OVERRIDE={{0xcc000, 5}}
+ *	
+ *     Note that if the override methods are used, place holders must
+ *     be specified for other boards in the system.
+ * 
+ * T128/T128F jumper/dipswitch settings (note : on my sample, the switches 
+ * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
+ *
+ * T128    Sw7 Sw8 Sw6 = 0ws Sw5 = boot 
+ * T128F   Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
+ * cc000   off off      
+ * c8000   off on
+ * dc000   on  off
+ * d8000   on  on
+ *
+ * 
+ * Interrupts 
+ * There is a 12 pin jumper block, jp1, numbered as follows : 
+ *   T128 (JP1)  	 T128F (J5)
+ * 2 4 6 8 10 12	11 9  7 5 3 1
+ * 1 3 5 7 9  11	12 10 8 6 4 2
+ *
+ * 3   2-4
+ * 5   1-3
+ * 7   3-5
+ * T128F only 
+ * 10 8-10
+ * 12 7-9
+ * 14 10-12
+ * 15 9-11
+ */
+ 
+/*
+ * $Log: t128.c,v $
+ */
+
+#include <asm/system.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "t128.h"
+#define AUTOPROBE_IRQ
+#include "NCR5380.h"
+
+static struct override {
+    unsigned long address;
+    int irq;
+} overrides 
+#ifdef T128_OVERRIDE
+    [] __initdata = T128_OVERRIDE;
+#else
+    [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO}, 
+        {0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
+#endif
+
+#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
+
+static struct base {
+    unsigned int address;
+    int noauto;
+} bases[] __initdata = {
+    { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
+};
+
+#define NO_BASES (sizeof (bases) / sizeof (struct base))
+
+static struct signature {
+    const char *string;
+    int offset;
+} signatures[] __initdata = {
+{"TSROM: SCSI BIOS, Version 1.12", 0x36},
+};
+
+#define NO_SIGNATURES (sizeof (signatures) /  sizeof (struct signature))
+
+/*
+ * Function : t128_setup(char *str, int *ints)
+ *
+ * Purpose : LILO command line initialization of the overrides array,
+ * 
+ * Inputs : str - unused, ints - array of integer parameters with ints[0]
+ *	equal to the number of ints.
+ *
+ */
+
+void __init t128_setup(char *str, int *ints){
+    static int commandline_current = 0;
+    int i;
+    if (ints[0] != 2) 
+	printk("t128_setup : usage t128=address,irq\n");
+    else 
+	if (commandline_current < NO_OVERRIDES) {
+	    overrides[commandline_current].address = ints[1];
+	    overrides[commandline_current].irq = ints[2];
+	    for (i = 0; i < NO_BASES; ++i)
+		if (bases[i].address == ints[1]) {
+		    bases[i].noauto = 1;
+		    break;
+		}
+	    ++commandline_current;
+	}
+}
+
+/* 
+ * Function : int t128_detect(Scsi_Host_Template * tpnt)
+ *
+ * Purpose : detects and initializes T128,T128F, or T228 controllers
+ *	that were autoprobed, overridden on the LILO command line, 
+ *	or specified at compile time.
+ *
+ * Inputs : tpnt - template for this SCSI adapter.
+ * 
+ * Returns : 1 if a host adapter was found, 0 if not.
+ *
+ */
+
+int __init t128_detect(Scsi_Host_Template * tpnt){
+    static int current_override = 0, current_base = 0;
+    struct Scsi_Host *instance;
+    unsigned long base;
+    void __iomem *p;
+    int sig, count;
+
+    tpnt->proc_name = "t128";
+    tpnt->proc_info = &t128_proc_info;
+
+    for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
+	base = 0;
+	p = NULL;
+
+	if (overrides[current_override].address) {
+	    base = overrides[current_override].address;
+	    p = ioremap(bases[current_base].address, 0x2000);
+	    if (!p)
+		base = 0;
+	} else 
+	    for (; !base && (current_base < NO_BASES); ++current_base) {
+#if (TDEBUG & TDEBUG_INIT)
+    printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
+#endif
+		if (bases[current_base].noauto)
+			continue;
+		p = ioremap(bases[current_base].address, 0x2000);
+		if (!p)
+			continue;
+		for (sig = 0; sig < NO_SIGNATURES; ++sig) 
+		    if (check_signature(p + signatures[sig].offset,
+					signatures[sig].string,
+					strlen(signatures[sig].string))) {
+			base = bases[current_base].address;
+#if (TDEBUG & TDEBUG_INIT)
+			printk("scsi-t128 : detected board.\n");
+#endif
+			goto found;
+		    }
+		iounmap(p);
+	    }
+
+#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
+	printk("scsi-t128 : base = %08x\n", (unsigned int) base);
+#endif
+
+	if (!base)
+	    break;
+
+found:
+	instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+	if(instance == NULL)
+		break;
+		
+	instance->base = base;
+	((struct NCR5380_hostdata *)instance->hostdata)->base = p;
+
+	NCR5380_init(instance, 0);
+
+	if (overrides[current_override].irq != IRQ_AUTO)
+	    instance->irq = overrides[current_override].irq;
+	else 
+	    instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
+
+	if (instance->irq != SCSI_IRQ_NONE) 
+	    if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128", instance)) {
+		printk("scsi%d : IRQ%d not free, interrupts disabled\n", 
+		    instance->host_no, instance->irq);
+		instance->irq = SCSI_IRQ_NONE;
+	    } 
+
+	if (instance->irq == SCSI_IRQ_NONE) {
+	    printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
+	    printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
+	}
+
+#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
+	printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
+#endif
+
+	printk("scsi%d : at 0x%08lx", instance->host_no, instance->base);
+	if (instance->irq == SCSI_IRQ_NONE)
+	    printk (" interrupts disabled");
+	else 
+	    printk (" irq %d", instance->irq);
+	printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
+	    CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);
+	NCR5380_print_options(instance);
+	printk("\n");
+
+	++current_override;
+	++count;
+    }
+    return count;
+}
+
+static int t128_release(struct Scsi_Host *shost)
+{
+	NCR5380_local_declare();
+	NCR5380_setup(shost);
+	if (shost->irq)
+		free_irq(shost->irq, NULL);
+	NCR5380_exit(shost);
+	if (shost->io_port && shost->n_io_port)
+		release_region(shost->io_port, shost->n_io_port);
+	scsi_unregister(shost);
+	iounmap(base);
+	return 0;
+}
+
+/*
+ * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip)
+ *
+ * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for 
+ *	the specified device / size.
+ * 
+ * Inputs : size = size of device in sectors (512 bytes), dev = block device
+ *	major / minor, ip[] = {heads, sectors, cylinders}  
+ *
+ * Returns : always 0 (success), initializes ip
+ *	
+ */
+
+/* 
+ * XXX Most SCSI boards use this mapping, I could be incorrect.  Some one
+ * using hard disks on a trantor should verify that this mapping corresponds
+ * to that used by the BIOS / ASPI driver by running the linux fdisk program
+ * and matching the H_C_S coordinates to what DOS uses.
+ */
+
+int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
+		sector_t capacity, int * ip)
+{
+  ip[0] = 64;
+  ip[1] = 32;
+  ip[2] = capacity >> 11;
+  return 0;
+}
+
+/*
+ * Function : int NCR5380_pread (struct Scsi_Host *instance, 
+ *	unsigned char *dst, int len)
+ *
+ * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to 
+ *	dst
+ * 
+ * Inputs : dst = destination, len = length in bytes
+ *
+ * Returns : 0 on success, non zero on a failure such as a watchdog 
+ * 	timeout.
+ */
+
+static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
+    int len) {
+    NCR5380_local_declare();
+    void __iomem *reg;
+    unsigned char *d = dst;
+    register int i = len;
+
+    NCR5380_setup(instance);
+    reg = base + T_DATA_REG_OFFSET;
+
+#if 0
+    for (; i; --i) {
+	while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+#else
+    while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+    for (; i; --i) {
+#endif
+	*d++ = readb(reg);
+    }
+
+    if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
+	unsigned char tmp;
+	void __iomem *foo = base + T_CONTROL_REG_OFFSET;
+	tmp = readb(foo);
+	writeb(tmp | T_CR_CT, foo);
+	writeb(tmp, foo);
+	printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
+	    instance->host_no);
+	return -1;
+    } else
+	return 0;
+}
+
+/*
+ * Function : int NCR5380_pwrite (struct Scsi_Host *instance, 
+ *	unsigned char *src, int len)
+ *
+ * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
+ *	src
+ * 
+ * Inputs : src = source, len = length in bytes
+ *
+ * Returns : 0 on success, non zero on a failure such as a watchdog 
+ * 	timeout.
+ */
+
+static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
+    int len) {
+    NCR5380_local_declare();
+    void __iomem *reg;
+    unsigned char *s = src;
+    register int i = len;
+
+    NCR5380_setup(instance);
+    reg = base + T_DATA_REG_OFFSET;
+
+#if 0
+    for (; i; --i) {
+	while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+#else
+    while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+    for (; i; --i) {
+#endif
+	writeb(*s++, reg);
+    }
+
+    if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
+	unsigned char tmp;
+	void __iomem *foo = base + T_CONTROL_REG_OFFSET;
+	tmp = readb(foo);
+	writeb(tmp | T_CR_CT, foo);
+	writeb(tmp, foo);
+	printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
+	    instance->host_no);
+	return -1;
+    } else 
+	return 0;
+}
+
+MODULE_LICENSE("GPL");
+
+#include "NCR5380.c"
+
+static Scsi_Host_Template driver_template = {
+	.name           = "Trantor T128/T128F/T228",
+	.detect         = t128_detect,
+	.release        = t128_release,
+	.queuecommand   = t128_queue_command,
+	.eh_abort_handler = t128_abort,
+	.eh_bus_reset_handler    = t128_bus_reset,
+	.eh_host_reset_handler   = t128_host_reset,
+	.eh_device_reset_handler = t128_device_reset,
+	.bios_param     = t128_biosparam,
+	.can_queue      = CAN_QUEUE,
+        .this_id        = 7,
+	.sg_tablesize   = SG_ALL,
+	.cmd_per_lun    = CMD_PER_LUN,
+	.use_clustering = DISABLE_CLUSTERING,
+};
+#include "scsi_module.c"