[linux.git] / drivers / scsi / t128.c

#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)
 *	[email protected]
 *      +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(struct 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(struct 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 struct 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,
	.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"
Commit	Line	Data
1da177e4 LT	1	#define AUTOSENSE
	2	#define PSEUDO_DMA
	3
	4	/*
	5	* Trantor T128/T128F/T228 driver
	6	* Note : architecturally, the T100 and T130 are different and won't
	7	* work
	8	*
	9	* Copyright 1993, Drew Eckhardt
	10	* Visionary Computing
	11	* (Unix and Linux consulting and custom programming)
	12	* [email protected]
	13	* +1 (303) 440-4894
	14	*
	15	* DISTRIBUTION RELEASE 3.
	16	*
	17	* For more information, please consult
	18	*
	19	* Trantor Systems, Ltd.
	20	* T128/T128F/T228 SCSI Host Adapter
	21	* Hardware Specifications
	22	*
	23	* Trantor Systems, Ltd.
	24	* 5415 Randall Place
	25	* Fremont, CA 94538
	26	* 1+ (415) 770-1400, FAX 1+ (415) 770-9910
	27	*
	28	* and
	29	*
	30	* NCR 5380 Family
	31	* SCSI Protocol Controller
	32	* Databook
	33	*
	34	* NCR Microelectronics
	35	* 1635 Aeroplaza Drive
	36	* Colorado Springs, CO 80916
	37	* 1+ (719) 578-3400
	38	* 1+ (800) 334-5454
	39	*/
	40
	41	/*
	42	* Options :
	43	* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
	44	* for commands that return with a CHECK CONDITION status.
	45	*
	46	* PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
	47	* increase compared to polled I/O.
	48	*
	49	* PARITY - enable parity checking. Not supported.
	50	*
	51	* SCSI2 - enable support for SCSI-II tagged queueing. Untested.
	52	*
	53	*
	54	* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You
	55	* only really want to use this if you're having a problem with
	56	* dropped characters during high speed communications, and even
	57	* then, you're going to be better off twiddling with transfersize.
	58	*
	59	* USLEEP - enable support for devices that don't disconnect. Untested.
	60	*
	61	* The card is detected and initialized in one of several ways :
	62	* 1. Autoprobe (default) - since the board is memory mapped,
	63	* a BIOS signature is scanned for to locate the registers.
	64	* An interrupt is triggered to autoprobe for the interrupt
65	* line.
66	*
67	* 2. With command line overrides - t128=address,irq may be
68	* used on the LILO command line to override the defaults.
69	*
70	* 3. With the T128_OVERRIDE compile time define. This is
71	* specified as an array of address, irq tuples. Ie, for
72	* one board at the default 0xcc000 address, IRQ5, I could say
73	* -DT128_OVERRIDE={{0xcc000, 5}}
74	*
75	* Note that if the override methods are used, place holders must
76	* be specified for other boards in the system.
77	*
78	* T128/T128F jumper/dipswitch settings (note : on my sample, the switches
79	* were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
80	*
81	* T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
82	* T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
83	* cc000 off off
84	* c8000 off on
85	* dc000 on off
86	* d8000 on on
87	*
88	*
89	* Interrupts
90	* There is a 12 pin jumper block, jp1, numbered as follows :
91	* T128 (JP1) T128F (J5)
92	* 2 4 6 8 10 12 11 9 7 5 3 1
93	* 1 3 5 7 9 11 12 10 8 6 4 2
94	*
95	* 3 2-4
96	* 5 1-3
97	* 7 3-5
98	* T128F only
99	* 10 8-10
100	* 12 7-9
101	* 14 10-12
102	* 15 9-11
103	*/
104
105	/*
106	* $Log: t128.c,v $
107	*/
108
109	#include <asm/system.h>
110	#include <linux/signal.h>
111	#include <linux/sched.h>
112	#include <asm/io.h>
113	#include <linux/blkdev.h>
114	#include <linux/interrupt.h>
115	#include <linux/stat.h>
116	#include <linux/init.h>
117	#include <linux/module.h>
118	#include <linux/delay.h>
119
120	#include "scsi.h"
121	#include <scsi/scsi_host.h>
122	#include "t128.h"
123	#define AUTOPROBE_IRQ
124	#include "NCR5380.h"
125
126	static struct override {
127	unsigned long address;
128	int irq;
129	} overrides
130	#ifdef T128_OVERRIDE
131	[] __initdata = T128_OVERRIDE;
132	#else
133	[4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
134	{0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
135	#endif
136
137	#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
138
139	static struct base {
140	unsigned int address;
141	int noauto;
142	} bases[] __initdata = {
143	{ 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
144	};
145
146	#define NO_BASES (sizeof (bases) / sizeof (struct base))
147
148	static struct signature {
149	const char *string;
150	int offset;
151	} signatures[] __initdata = {
152	{"TSROM: SCSI BIOS, Version 1.12", 0x36},
153	};
154
155	#define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
156
157	/*
158	* Function : t128_setup(char str, int ints)
159	*
160	* Purpose : LILO command line initialization of the overrides array,
161	*
162	* Inputs : str - unused, ints - array of integer parameters with ints[0]
163	* equal to the number of ints.
164	*
165	*/
166
167	void __init t128_setup(char str, int ints){
168	static int commandline_current = 0;
169	int i;
170	if (ints[0] != 2)
171	printk("t128_setup : usage t128=address,irq\n");
172	else
173	if (commandline_current < NO_OVERRIDES) {
174	overrides[commandline_current].address = ints[1];
175	overrides[commandline_current].irq = ints[2];
176	for (i = 0; i < NO_BASES; ++i)
177	if (bases[i].address == ints[1]) {
178	bases[i].noauto = 1;
179	break;
180	}
181	++commandline_current;
182	}
183	}
184
185	/*
d0be4a7d	186	* Function : int t128_detect(struct scsi_host_template * tpnt)
1da177e4 LT	187	*
	188	* Purpose : detects and initializes T128,T128F, or T228 controllers
	189	* that were autoprobed, overridden on the LILO command line,
	190	* or specified at compile time.
	191	*
	192	* Inputs : tpnt - template for this SCSI adapter.
	193	*
	194	* Returns : 1 if a host adapter was found, 0 if not.
	195	*
	196	*/
	197
d0be4a7d	198	int __init t128_detect(struct scsi_host_template * tpnt){
1da177e4 LT	199	static int current_override = 0, current_base = 0;
	200	struct Scsi_Host *instance;
	201	unsigned long base;
	202	void __iomem *p;
	203	int sig, count;
	204
	205	tpnt->proc_name = "t128";
	206	tpnt->proc_info = &t128_proc_info;
	207
	208	for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
	209	base = 0;
	210	p = NULL;
	211
	212	if (overrides[current_override].address) {
	213	base = overrides[current_override].address;
	214	p = ioremap(bases[current_base].address, 0x2000);
	215	if (!p)
	216	base = 0;
	217	} else
	218	for (; !base && (current_base < NO_BASES); ++current_base) {
	219	#if (TDEBUG & TDEBUG_INIT)
	220	printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
	221	#endif
	222	if (bases[current_base].noauto)
	223	continue;
	224	p = ioremap(bases[current_base].address, 0x2000);
	225	if (!p)
	226	continue;
	227	for (sig = 0; sig < NO_SIGNATURES; ++sig)
	228	if (check_signature(p + signatures[sig].offset,
	229	signatures[sig].string,
	230	strlen(signatures[sig].string))) {
	231	base = bases[current_base].address;
	232	#if (TDEBUG & TDEBUG_INIT)
	233	printk("scsi-t128 : detected board.\n");
	234	#endif
	235	goto found;
	236	}
	237	iounmap(p);
	238	}
	239
	240	#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
	241	printk("scsi-t128 : base = %08x\n", (unsigned int) base);
	242	#endif
	243
	244	if (!base)
	245	break;
	246
	247	found:
	248	instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
	249	if(instance == NULL)
	250	break;
	251
	252	instance->base = base;
	253	((struct NCR5380_hostdata *)instance->hostdata)->base = p;
	254
	255	NCR5380_init(instance, 0);
	256
	257	if (overrides[current_override].irq != IRQ_AUTO)
	258	instance->irq = overrides[current_override].irq;
	259	else
	260	instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
	261
	262	if (instance->irq != SCSI_IRQ_NONE)
263	if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128", instance)) {
264	printk("scsi%d : IRQ%d not free, interrupts disabled\n",
265	instance->host_no, instance->irq);
266	instance->irq = SCSI_IRQ_NONE;
267	}
268
269	if (instance->irq == SCSI_IRQ_NONE) {
270	printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
271	printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
272	}
273
274	#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
275	printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
276	#endif
277
278	printk("scsi%d : at 0x%08lx", instance->host_no, instance->base);
279	if (instance->irq == SCSI_IRQ_NONE)
280	printk (" interrupts disabled");
281	else
282	printk (" irq %d", instance->irq);
283	printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
284	CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);
285	NCR5380_print_options(instance);
286	printk("\n");
287
288	++current_override;
289	++count;
290	}
291	return count;
292	}
293
294	static int t128_release(struct Scsi_Host *shost)
295	{
296	NCR5380_local_declare();
297	NCR5380_setup(shost);
298	if (shost->irq)
299	free_irq(shost->irq, NULL);
300	NCR5380_exit(shost);
301	if (shost->io_port && shost->n_io_port)
302	release_region(shost->io_port, shost->n_io_port);
303	scsi_unregister(shost);
304	iounmap(base);
305	return 0;
306	}
307
308	/*
309	* Function : int t128_biosparam(Disk * disk, struct block_device dev, int ip)
310	*
311	* Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
312	* the specified device / size.
313	*
314	* Inputs : size = size of device in sectors (512 bytes), dev = block device
315	* major / minor, ip[] = {heads, sectors, cylinders}
316	*
317	* Returns : always 0 (success), initializes ip
318	*
319	*/
320
321	/*
322	* XXX Most SCSI boards use this mapping, I could be incorrect. Some one
323	* using hard disks on a trantor should verify that this mapping corresponds
324	* to that used by the BIOS / ASPI driver by running the linux fdisk program
325	* and matching the H_C_S coordinates to what DOS uses.
326	*/
327
328	int t128_biosparam(struct scsi_device sdev, struct block_device bdev,
329	sector_t capacity, int * ip)
330	{
331	ip[0] = 64;
332	ip[1] = 32;
333	ip[2] = capacity >> 11;
334	return 0;
335	}
336
337	/*
338	* Function : int NCR5380_pread (struct Scsi_Host *instance,
339	* unsigned char *dst, int len)
340	*
341	* Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
342	* dst
343	*
344	* Inputs : dst = destination, len = length in bytes
345	*
346	* Returns : 0 on success, non zero on a failure such as a watchdog
347	* timeout.
348	*/
349
350	static inline int NCR5380_pread (struct Scsi_Host instance, unsigned char dst,
351	int len) {
352	NCR5380_local_declare();
353	void __iomem *reg;
354	unsigned char *d = dst;
355	register int i = len;
356
357	NCR5380_setup(instance);
358	reg = base + T_DATA_REG_OFFSET;
359
360	#if 0
361	for (; i; --i) {
362	while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
363	#else
364	while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
365	for (; i; --i) {
366	#endif
367	*d++ = readb(reg);
368	}
369
370	if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
371	unsigned char tmp;
372	void __iomem *foo = base + T_CONTROL_REG_OFFSET;
373	tmp = readb(foo);
374	writeb(tmp \| T_CR_CT, foo);
375	writeb(tmp, foo);
376	printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
377	instance->host_no);
378	return -1;
379	} else
380	return 0;
381	}
382
383	/*
384	* Function : int NCR5380_pwrite (struct Scsi_Host *instance,
385	* unsigned char *src, int len)
386	*
387	* Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
388	* src
389	*
390	* Inputs : src = source, len = length in bytes
391	*
392	* Returns : 0 on success, non zero on a failure such as a watchdog
393	* timeout.
394	*/
395
396	static inline int NCR5380_pwrite (struct Scsi_Host instance, unsigned char src,
397	int len) {
398	NCR5380_local_declare();
399	void __iomem *reg;
400	unsigned char *s = src;
401	register int i = len;
402
403	NCR5380_setup(instance);
404	reg = base + T_DATA_REG_OFFSET;
405
406	#if 0
407	for (; i; --i) {
408	while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
409	#else
410	while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
411	for (; i; --i) {
412	#endif
413	writeb(*s++, reg);
414	}
415
416	if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
417	unsigned char tmp;
418	void __iomem *foo = base + T_CONTROL_REG_OFFSET;
419	tmp = readb(foo);
420	writeb(tmp \| T_CR_CT, foo);
421	writeb(tmp, foo);
422	printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
423	instance->host_no);
424	return -1;
425	} else
426	return 0;
427	}
428
429	MODULE_LICENSE("GPL");
430
431	#include "NCR5380.c"
432
d0be4a7d	433	static struct scsi_host_template driver_template = {
1da177e4 LT	434	.name = "Trantor T128/T128F/T228",
	435	.detect = t128_detect,
	436	.release = t128_release,
	437	.queuecommand = t128_queue_command,
	438	.eh_abort_handler = t128_abort,
	439	.eh_bus_reset_handler = t128_bus_reset,
1da177e4 LT	440	.bios_param = t128_biosparam,
	441	.can_queue = CAN_QUEUE,
	442	.this_id = 7,
	443	.sg_tablesize = SG_ALL,
	444	.cmd_per_lun = CMD_PER_LUN,
	445	.use_clustering = DISABLE_CLUSTERING,
	446	};
	447	#include "scsi_module.c"