[PATCH] libata-hp-prep: store attached SCSI device
[linux-2.6] / drivers / scsi / g_NCR5380.c
1 /*
2  * Generic Generic NCR5380 driver
3  *      
4  * Copyright 1993, Drew Eckhardt
5  *      Visionary Computing
6  *      (Unix and Linux consulting and custom programming)
7  *      drew@colorado.edu
8  *      +1 (303) 440-4894
9  *
10  * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
11  *    K.Lentin@cs.monash.edu.au
12  *
13  * NCR53C400A extensions (c) 1996, Ingmar Baumgart
14  *    ingmar@gonzo.schwaben.de
15  *
16  * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
17  * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
18  *
19  * Added ISAPNP support for DTC436 adapters,
20  * Thomas Sailer, sailer@ife.ee.ethz.ch
21  *
22  * ALPHA RELEASE 1. 
23  *
24  * For more information, please consult 
25  *
26  * NCR 5380 Family
27  * SCSI Protocol Controller
28  * Databook
29  *
30  * NCR Microelectronics
31  * 1635 Aeroplaza Drive
32  * Colorado Springs, CO 80916
33  * 1+ (719) 578-3400
34  * 1+ (800) 334-5454
35  */
36
37 /* 
38  * TODO : flesh out DMA support, find some one actually using this (I have
39  *      a memory mapped Trantor board that works fine)
40  */
41
42 /*
43  * Options :
44  *
45  * PARITY - enable parity checking.  Not supported.
46  *
47  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
48  *
49  * USLEEP - enable support for devices that don't disconnect.  Untested.
50  *
51  * The card is detected and initialized in one of several ways : 
52  * 1.  With command line overrides - NCR5380=port,irq may be 
53  *     used on the LILO command line to override the defaults.
54  *
55  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is 
56  *     specified as an array of address, irq, dma, board tuples.  Ie, for
57  *     one board at 0x350, IRQ5, no dma, I could say  
58  *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
59  * 
60  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an 
61  *      IRQ line if overridden on the command line.
62  *
63  * 3.  When included as a module, with arguments passed on the command line:
64  *         ncr_irq=xx   the interrupt
65  *         ncr_addr=xx  the port or base address (for port or memory
66  *                      mapped, resp.)
67  *         ncr_dma=xx   the DMA
68  *         ncr_5380=1   to set up for a NCR5380 board
69  *         ncr_53c400=1 to set up for a NCR53C400 board
70  *     e.g.
71  *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
72  *       for a port mapped NCR5380 board or
73  *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
74  *       for a memory mapped NCR53C400 board with interrupts disabled.
75  * 
76  * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
77  *      IRQ line if overridden on the command line.
78  *     
79  */
80
81 /*
82  * $Log: generic_NCR5380.c,v $
83  */
84
85 /* settings for DTC3181E card with only Mustek scanner attached */
86 #define USLEEP
87 #define USLEEP_POLL     1
88 #define USLEEP_SLEEP    20
89 #define USLEEP_WAITLONG 500
90
91 #define AUTOPROBE_IRQ
92 #define AUTOSENSE
93
94 #include <linux/config.h>
95
96 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
97 #define NCR53C400_PSEUDO_DMA 1
98 #define PSEUDO_DMA
99 #define NCR53C400
100 #define NCR5380_STATS
101 #undef NCR5380_STAT_LIMIT
102 #endif
103
104 #include <asm/system.h>
105 #include <asm/io.h>
106 #include <linux/signal.h>
107 #include <linux/sched.h>
108 #include <linux/blkdev.h>
109 #include "scsi.h"
110 #include <scsi/scsi_host.h>
111 #include "g_NCR5380.h"
112 #include "NCR5380.h"
113 #include <linux/stat.h>
114 #include <linux/init.h>
115 #include <linux/ioport.h>
116 #include <linux/isapnp.h>
117 #include <linux/delay.h>
118 #include <linux/interrupt.h>
119
120 #define NCR_NOT_SET 0
121 static int ncr_irq = NCR_NOT_SET;
122 static int ncr_dma = NCR_NOT_SET;
123 static int ncr_addr = NCR_NOT_SET;
124 static int ncr_5380 = NCR_NOT_SET;
125 static int ncr_53c400 = NCR_NOT_SET;
126 static int ncr_53c400a = NCR_NOT_SET;
127 static int dtc_3181e = NCR_NOT_SET;
128
129 static struct override {
130         NCR5380_map_type NCR5380_map_name;
131         int irq;
132         int dma;
133         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
134 } overrides
135 #ifdef GENERIC_NCR5380_OVERRIDE
136 [] __initdata = GENERIC_NCR5380_OVERRIDE;
137 #else
138 [1] __initdata = { { 0,},};
139 #endif
140
141
142 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
143
144 #ifndef MODULE 
145
146 /**
147  *      internal_setup          -       handle lilo command string override
148  *      @board: BOARD_* identifier for the board
149  *      @str: unused
150  *      @ints: numeric parameters
151  *
152  *      Do LILO command line initialization of the overrides array. Display
153  *      errors when needed
154  *
155  *      Locks: none
156  */
157
158 static void __init internal_setup(int board, char *str, int *ints)
159 {
160         static int commandline_current = 0;
161         switch (board) {
162         case BOARD_NCR5380:
163                 if (ints[0] != 2 && ints[0] != 3) {
164                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
165                         return;
166                 }
167                 break;
168         case BOARD_NCR53C400:
169                 if (ints[0] != 2) {
170                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
171                         return;
172                 }
173                 break;
174         case BOARD_NCR53C400A:
175                 if (ints[0] != 2) {
176                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
177                         return;
178                 }
179                 break;
180         case BOARD_DTC3181E:
181                 if (ints[0] != 2) {
182                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
183                         return;
184                 }
185                 break;
186         }
187
188         if (commandline_current < NO_OVERRIDES) {
189                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
190                 overrides[commandline_current].irq = ints[2];
191                 if (ints[0] == 3)
192                         overrides[commandline_current].dma = ints[3];
193                 else
194                         overrides[commandline_current].dma = DMA_NONE;
195                 overrides[commandline_current].board = board;
196                 ++commandline_current;
197         }
198 }
199
200
201 /**
202  *      do_NCR53C80_setup               -       set up entry point
203  *      @str: unused
204  *
205  *      Setup function invoked at boot to parse the ncr5380= command
206  *      line.
207  */
208
209 static int __init do_NCR5380_setup(char *str)
210 {
211         int ints[10];
212
213         get_options(str, sizeof(ints) / sizeof(int), ints);
214         internal_setup(BOARD_NCR5380, str, ints);
215         return 1;
216 }
217
218 /**
219  *      do_NCR53C400_setup              -       set up entry point
220  *      @str: unused
221  *      @ints: integer parameters from kernel setup code 
222  *
223  *      Setup function invoked at boot to parse the ncr53c400= command
224  *      line.
225  */
226
227 static int __init do_NCR53C400_setup(char *str)
228 {
229         int ints[10];
230
231         get_options(str, sizeof(ints) / sizeof(int), ints);
232         internal_setup(BOARD_NCR53C400, str, ints);
233         return 1;
234 }
235
236 /**
237  *      do_NCR53C400A_setup     -       set up entry point
238  *      @str: unused
239  *      @ints: integer parameters from kernel setup code 
240  *
241  *      Setup function invoked at boot to parse the ncr53c400a= command
242  *      line.
243  */
244
245 static int __init do_NCR53C400A_setup(char *str)
246 {
247         int ints[10];
248
249         get_options(str, sizeof(ints) / sizeof(int), ints);
250         internal_setup(BOARD_NCR53C400A, str, ints);
251         return 1;
252 }
253
254 /**
255  *      do_DTC3181E_setup       -       set up entry point
256  *      @str: unused
257  *      @ints: integer parameters from kernel setup code 
258  *
259  *      Setup function invoked at boot to parse the dtc3181e= command
260  *      line.
261  */
262
263 static int __init do_DTC3181E_setup(char *str)
264 {
265         int ints[10];
266
267         get_options(str, sizeof(ints) / sizeof(int), ints);
268         internal_setup(BOARD_DTC3181E, str, ints);
269         return 1;
270 }
271
272 #endif
273
274 /**
275  *      generic_NCR5380_detect  -       look for NCR5380 controllers
276  *      @tpnt: the scsi template
277  *
278  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
279  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
280  *      them.
281  *
282  *      The caller supplied NCR5380_init function is invoked from here, before
283  *      the interrupt line is taken.
284  *
285  *      Locks: none
286  */
287
288 int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
289 {
290         static int current_override = 0;
291         int count, i;
292         unsigned int *ports;
293         unsigned long region_size = 16;
294         static unsigned int __initdata ncr_53c400a_ports[] = {
295                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
296         };
297         static unsigned int __initdata dtc_3181e_ports[] = {
298                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
299         };
300         int flags = 0;
301         struct Scsi_Host *instance;
302 #ifdef CONFIG_SCSI_G_NCR5380_MEM
303         unsigned long base;
304         void __iomem *iomem;
305 #endif
306
307         if (ncr_irq != NCR_NOT_SET)
308                 overrides[0].irq = ncr_irq;
309         if (ncr_dma != NCR_NOT_SET)
310                 overrides[0].dma = ncr_dma;
311         if (ncr_addr != NCR_NOT_SET)
312                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
313         if (ncr_5380 != NCR_NOT_SET)
314                 overrides[0].board = BOARD_NCR5380;
315         else if (ncr_53c400 != NCR_NOT_SET)
316                 overrides[0].board = BOARD_NCR53C400;
317         else if (ncr_53c400a != NCR_NOT_SET)
318                 overrides[0].board = BOARD_NCR53C400A;
319         else if (dtc_3181e != NCR_NOT_SET)
320                 overrides[0].board = BOARD_DTC3181E;
321
322         if (!current_override && isapnp_present()) {
323                 struct pnp_dev *dev = NULL;
324                 count = 0;
325                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
326                         if (count >= NO_OVERRIDES)
327                                 break;
328                         if (pnp_device_attach(dev) < 0) {
329                                 printk(KERN_ERR "dtc436e probe: attach failed\n");
330                                 continue;
331                         }
332                         if (pnp_activate_dev(dev) < 0) {
333                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
334                                 pnp_device_detach(dev);
335                                 continue;
336                         }
337                         if (!pnp_port_valid(dev, 0)) {
338                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
339                                 pnp_device_detach(dev);
340                                 continue;
341                         }
342                         if (pnp_irq_valid(dev, 0))
343                                 overrides[count].irq = pnp_irq(dev, 0);
344                         else
345                                 overrides[count].irq = SCSI_IRQ_NONE;
346                         if (pnp_dma_valid(dev, 0))
347                                 overrides[count].dma = pnp_dma(dev, 0);
348                         else
349                                 overrides[count].dma = DMA_NONE;
350                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
351                         overrides[count].board = BOARD_DTC3181E;
352                         count++;
353                 }
354         }
355
356         tpnt->proc_name = "g_NCR5380";
357
358         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
359                 if (!(overrides[current_override].NCR5380_map_name))
360                         continue;
361
362                 ports = NULL;
363                 switch (overrides[current_override].board) {
364                 case BOARD_NCR5380:
365                         flags = FLAG_NO_PSEUDO_DMA;
366                         break;
367                 case BOARD_NCR53C400:
368                         flags = FLAG_NCR53C400;
369                         break;
370                 case BOARD_NCR53C400A:
371                         flags = FLAG_NO_PSEUDO_DMA;
372                         ports = ncr_53c400a_ports;
373                         break;
374                 case BOARD_DTC3181E:
375                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
376                         ports = dtc_3181e_ports;
377                         break;
378                 }
379
380 #ifndef CONFIG_SCSI_G_NCR5380_MEM
381                 if (ports) {
382                         /* wakeup sequence for the NCR53C400A and DTC3181E */
383
384                         /* Disable the adapter and look for a free io port */
385                         outb(0x59, 0x779);
386                         outb(0xb9, 0x379);
387                         outb(0xc5, 0x379);
388                         outb(0xae, 0x379);
389                         outb(0xa6, 0x379);
390                         outb(0x00, 0x379);
391
392                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
393                                 for (i = 0; ports[i]; i++) {
394                                         if (!request_region(ports[i],  16, "ncr53c80"))
395                                                 continue;
396                                         if (overrides[current_override].NCR5380_map_name == ports[i])
397                                                 break;
398                                         release_region(ports[i], 16);
399                         } else
400                                 for (i = 0; ports[i]; i++) {
401                                         if (!request_region(ports[i],  16, "ncr53c80"))
402                                                 continue;
403                                         if (inb(ports[i]) == 0xff)
404                                                 break;
405                                         release_region(ports[i], 16);
406                                 }
407                         if (ports[i]) {
408                                 /* At this point we have our region reserved */
409                                 outb(0x59, 0x779);
410                                 outb(0xb9, 0x379);
411                                 outb(0xc5, 0x379);
412                                 outb(0xae, 0x379);
413                                 outb(0xa6, 0x379);
414                                 outb(0x80 | i, 0x379);  /* set io port to be used */
415                                 outb(0xc0, ports[i] + 9);
416                                 if (inb(ports[i] + 9) != 0x80)
417                                         continue;
418                                 else
419                                         overrides[current_override].NCR5380_map_name = ports[i];
420                         } else
421                                 continue;
422                 }
423                 else
424                 {
425                         /* Not a 53C400A style setup - just grab */
426                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
427                                 continue;
428                         region_size = NCR5380_region_size;
429                 }
430 #else
431                 base = overrides[current_override].NCR5380_map_name;
432                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
433                         continue;
434                 iomem = ioremap(base, NCR5380_region_size);
435                 if (!iomem) {
436                         release_mem_region(base, NCR5380_region_size);
437                         continue;
438                 }
439 #endif
440                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
441                 if (instance == NULL) {
442 #ifndef CONFIG_SCSI_G_NCR5380_MEM
443                         release_region(overrides[current_override].NCR5380_map_name, region_size);
444 #else
445                         iounmap(iomem);
446                         release_mem_region(base, NCR5380_region_size);
447 #endif
448                         continue;
449                 }
450
451                 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
452 #ifndef CONFIG_SCSI_G_NCR5380_MEM
453                 instance->n_io_port = region_size;
454 #else
455                 ((struct NCR5380_hostdata *)instance->hostdata).iomem = iomem;
456 #endif
457
458                 NCR5380_init(instance, flags);
459
460                 if (overrides[current_override].irq != IRQ_AUTO)
461                         instance->irq = overrides[current_override].irq;
462                 else
463                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
464
465                 if (instance->irq != SCSI_IRQ_NONE)
466                         if (request_irq(instance->irq, generic_NCR5380_intr, SA_INTERRUPT, "NCR5380", instance)) {
467                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
468                                 instance->irq = SCSI_IRQ_NONE;
469                         }
470
471                 if (instance->irq == SCSI_IRQ_NONE) {
472                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
473                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
474                 }
475
476                 printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
477                 if (instance->irq == SCSI_IRQ_NONE)
478                         printk(" interrupts disabled");
479                 else
480                         printk(" irq %d", instance->irq);
481                 printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
482                 NCR5380_print_options(instance);
483                 printk("\n");
484
485                 ++current_override;
486                 ++count;
487         }
488         return count;
489 }
490
491 /**
492  *      generic_NCR5380_info    -       reporting string
493  *      @host: NCR5380 to report on
494  *
495  *      Report driver information for the NCR5380
496  */
497         
498 const char *generic_NCR5380_info(struct Scsi_Host *host)
499 {
500         static const char string[] = "Generic NCR5380/53C400 Driver";
501         return string;
502 }
503
504 /**
505  *      generic_NCR5380_release_resources       -       free resources
506  *      @instance: host adapter to clean up 
507  *
508  *      Free the generic interface resources from this adapter.
509  *
510  *      Locks: none
511  */
512  
513 int generic_NCR5380_release_resources(struct Scsi_Host *instance)
514 {
515         NCR5380_local_declare();
516         NCR5380_setup(instance);
517         
518         if (instance->irq != SCSI_IRQ_NONE)
519                 free_irq(instance->irq, NULL);
520         NCR5380_exit(instance);
521
522 #ifndef CONFIG_SCSI_G_NCR5380_MEM
523         release_region(instance->NCR5380_instance_name, instance->n_io_port);
524 #else
525         iounmap(((struct NCR5380_hostdata *)instance->hostdata).iomem);
526         release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
527 #endif
528
529
530         return 0;
531 }
532
533 #ifdef BIOSPARAM
534 /**
535  *      generic_NCR5380_biosparam
536  *      @disk: disk to compute geometry for
537  *      @dev: device identifier for this disk
538  *      @ip: sizes to fill in
539  *
540  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified 
541  *      device / size.
542  * 
543  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
544  *      using hard disks on a trantor should verify that this mapping
545  *      corresponds to that used by the BIOS / ASPI driver by running the linux
546  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
547  *
548  *      Locks: none
549  */
550
551 static int
552 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
553                           sector_t capacity, int *ip)
554 {
555         ip[0] = 64;
556         ip[1] = 32;
557         ip[2] = capacity >> 11;
558         return 0;
559 }
560 #endif
561
562 #if NCR53C400_PSEUDO_DMA
563
564 /**
565  *      NCR5380_pread           -       pseudo DMA read
566  *      @instance: adapter to read from
567  *      @dst: buffer to read into
568  *      @len: buffer length
569  *
570  *      Perform a psuedo DMA mode read from an NCR53C400 or equivalent
571  *      controller
572  */
573  
574 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
575 {
576         int blocks = len / 128;
577         int start = 0;
578         int bl;
579
580         NCR5380_local_declare();
581         NCR5380_setup(instance);
582
583         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
584         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
585         while (1) {
586                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
587                         break;
588                 }
589                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
590                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
591                         return -1;
592                 }
593                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
594
595 #ifndef CONFIG_SCSI_G_NCR5380_MEM
596                 {
597                         int i;
598                         for (i = 0; i < 128; i++)
599                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
600                 }
601 #else
602                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
603                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
604 #endif
605                 start += 128;
606                 blocks--;
607         }
608
609         if (blocks) {
610                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
611                 {
612                         // FIXME - no timeout
613                 }
614
615 #ifndef CONFIG_SCSI_G_NCR5380_MEM
616                 {
617                         int i;  
618                         for (i = 0; i < 128; i++)
619                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
620                 }
621 #else
622                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
623                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
624 #endif
625                 start += 128;
626                 blocks--;
627         }
628
629         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
630                 printk("53C400r: no 53C80 gated irq after transfer");
631
632 #if 0
633         /*
634          *      DON'T DO THIS - THEY NEVER ARRIVE!
635          */
636         printk("53C400r: Waiting for 53C80 registers\n");
637         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
638                 ;
639 #endif
640         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
641                 printk(KERN_ERR "53C400r: no end dma signal\n");
642                 
643         NCR5380_write(MODE_REG, MR_BASE);
644         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
645         return 0;
646 }
647
648 /**
649  *      NCR5380_write           -       pseudo DMA write
650  *      @instance: adapter to read from
651  *      @dst: buffer to read into
652  *      @len: buffer length
653  *
654  *      Perform a psuedo DMA mode read from an NCR53C400 or equivalent
655  *      controller
656  */
657
658 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
659 {
660         int blocks = len / 128;
661         int start = 0;
662         int bl;
663         int i;
664
665         NCR5380_local_declare();
666         NCR5380_setup(instance);
667
668         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
669         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
670         while (1) {
671                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
672                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
673                         return -1;
674                 }
675
676                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
677                         break;
678                 }
679                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
680                         ; // FIXME - timeout
681 #ifndef CONFIG_SCSI_G_NCR5380_MEM
682                 {
683                         for (i = 0; i < 128; i++)
684                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
685                 }
686 #else
687                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
688                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
689 #endif
690                 start += 128;
691                 blocks--;
692         }
693         if (blocks) {
694                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
695                         ; // FIXME - no timeout
696
697 #ifndef CONFIG_SCSI_G_NCR5380_MEM
698                 {
699                         for (i = 0; i < 128; i++)
700                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
701                 }
702 #else
703                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
704                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
705 #endif
706                 start += 128;
707                 blocks--;
708         }
709
710 #if 0
711         printk("53C400w: waiting for registers to be available\n");
712         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
713         printk("53C400w: Got em\n");
714 #endif
715
716         /* Let's wait for this instead - could be ugly */
717         /* All documentation says to check for this. Maybe my hardware is too
718          * fast. Waiting for it seems to work fine! KLL
719          */
720         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
721                 ;       // FIXME - no timeout
722
723         /*
724          * I know. i is certainly != 0 here but the loop is new. See previous
725          * comment.
726          */
727         if (i) {
728                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
729                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
730         } else
731                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
732
733 #if 0
734         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
735                 printk(KERN_ERR "53C400w: no end dma signal\n");
736         }
737 #endif
738         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
739                 ;       // TIMEOUT
740         return 0;
741 }
742 #endif                          /* PSEUDO_DMA */
743
744 /*
745  *      Include the NCR5380 core code that we build our driver around   
746  */
747  
748 #include "NCR5380.c"
749
750 #define PRINTP(x) len += sprintf(buffer+len, x)
751 #define ANDP ,
752
753 static int sprint_opcode(char *buffer, int len, int opcode)
754 {
755         int start = len;
756         PRINTP("0x%02x " ANDP opcode);
757         return len - start;
758 }
759
760 static int sprint_command(char *buffer, int len, unsigned char *command)
761 {
762         int i, s, start = len;
763         len += sprint_opcode(buffer, len, command[0]);
764         for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
765                 PRINTP("%02x " ANDP command[i]);
766         PRINTP("\n");
767         return len - start;
768 }
769
770 /**
771  *      sprintf_Scsi_Cmnd       -       print a scsi command
772  *      @buffer: buffr to print into
773  *      @len: buffer length
774  *      @cmd: SCSI command block
775  *      
776  *      Print out the target and command data in hex
777  */
778
779 static int sprint_Scsi_Cmnd(char *buffer, int len, Scsi_Cmnd * cmd)
780 {
781         int start = len;
782         PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
783         PRINTP("        command = ");
784         len += sprint_command(buffer, len, cmd->cmnd);
785         return len - start;
786 }
787
788 /**
789  *      generic_NCR5380_proc_info       -       /proc for NCR5380 driver
790  *      @buffer: buffer to print into
791  *      @start: start position
792  *      @offset: offset into buffer
793  *      @len: length
794  *      @hostno: instance to affect
795  *      @inout: read/write
796  *
797  *      Provide the procfs information for the 5380 controller. We fill
798  *      this with useful debugging information including the commands
799  *      being executed, disconnected command queue and the statistical
800  *      data
801  *
802  *      Locks: global cli/lock for queue walk
803  */
804  
805 static int generic_NCR5380_proc_info(struct Scsi_Host *scsi_ptr, char *buffer, char **start, off_t offset, int length, int inout)
806 {
807         int len = 0;
808         NCR5380_local_declare();
809         unsigned long flags;
810         unsigned char status;
811         int i;
812         Scsi_Cmnd *ptr;
813         struct NCR5380_hostdata *hostdata;
814 #ifdef NCR5380_STATS
815         struct scsi_device *dev;
816         extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
817 #endif
818
819         NCR5380_setup(scsi_ptr);
820         hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;
821
822         spin_lock_irqsave(scsi_ptr->host_lock, flags);
823         PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
824         PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
825         PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
826 #ifdef NCR53C400
827         PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
828         PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
829 # if NCR53C400_PSEUDO_DMA
830         PRINTP("NCR53C400 pseudo DMA used\n");
831 # endif
832 #else
833         PRINTP("NO NCR53C400 driver extensions\n");
834 #endif
835         PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
836         if (scsi_ptr->irq == SCSI_IRQ_NONE)
837                 PRINTP("no interrupt\n");
838         else
839                 PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
840
841 #ifdef NCR5380_STATS
842         if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
843                 PRINTP("There are commands pending, transfer rates may be crud\n");
844         if (hostdata->pendingr)
845                 PRINTP("  %d pending reads" ANDP hostdata->pendingr);
846         if (hostdata->pendingw)
847                 PRINTP("  %d pending writes" ANDP hostdata->pendingw);
848         if (hostdata->pendingr || hostdata->pendingw)
849                 PRINTP("\n");
850         shost_for_each_device(dev, scsi_ptr) {
851                 unsigned long br = hostdata->bytes_read[dev->id];
852                 unsigned long bw = hostdata->bytes_write[dev->id];
853                 long tr = hostdata->time_read[dev->id] / HZ;
854                 long tw = hostdata->time_write[dev->id] / HZ;
855
856                 PRINTP("  T:%d %s " ANDP dev->id ANDP(dev->type < MAX_SCSI_DEVICE_CODE) ? scsi_device_types[(int) dev->type] : "Unknown");
857                 for (i = 0; i < 8; i++)
858                         if (dev->vendor[i] >= 0x20)
859                                 *(buffer + (len++)) = dev->vendor[i];
860                 *(buffer + (len++)) = ' ';
861                 for (i = 0; i < 16; i++)
862                         if (dev->model[i] >= 0x20)
863                                 *(buffer + (len++)) = dev->model[i];
864                 *(buffer + (len++)) = ' ';
865                 for (i = 0; i < 4; i++)
866                         if (dev->rev[i] >= 0x20)
867                                 *(buffer + (len++)) = dev->rev[i];
868                 *(buffer + (len++)) = ' ';
869
870                 PRINTP("\n%10ld kb read    in %5ld secs" ANDP br / 1024 ANDP tr);
871                 if (tr)
872                         PRINTP(" @ %5ld bps" ANDP br / tr);
873
874                 PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
875                 if (tw)
876                         PRINTP(" @ %5ld bps" ANDP bw / tw);
877                 PRINTP("\n");
878         }
879 #endif
880
881         status = NCR5380_read(STATUS_REG);
882         if (!(status & SR_REQ))
883                 PRINTP("REQ not asserted, phase unknown.\n");
884         else {
885                 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
886                 PRINTP("Phase %s\n" ANDP phases[i].name);
887         }
888
889         if (!hostdata->connected) {
890                 PRINTP("No currently connected command\n");
891         } else {
892                 len += sprint_Scsi_Cmnd(buffer, len, (Scsi_Cmnd *) hostdata->connected);
893         }
894
895         PRINTP("issue_queue\n");
896
897         for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
898                 len += sprint_Scsi_Cmnd(buffer, len, ptr);
899
900         PRINTP("disconnected_queue\n");
901
902         for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
903                 len += sprint_Scsi_Cmnd(buffer, len, ptr);
904
905         *start = buffer + offset;
906         len -= offset;
907         if (len > length)
908                 len = length;
909         spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
910         return len;
911 }
912
913 #undef PRINTP
914 #undef ANDP
915
916 static struct scsi_host_template driver_template = {
917         .proc_info              = generic_NCR5380_proc_info,
918         .name                   = "Generic NCR5380/NCR53C400 Scsi Driver",
919         .detect                 = generic_NCR5380_detect,
920         .release                = generic_NCR5380_release_resources,
921         .info                   = generic_NCR5380_info,
922         .queuecommand           = generic_NCR5380_queue_command,
923         .eh_abort_handler       = generic_NCR5380_abort,
924         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
925         .bios_param             = NCR5380_BIOSPARAM,
926         .can_queue              = CAN_QUEUE,
927         .this_id                = 7,
928         .sg_tablesize           = SG_ALL,
929         .cmd_per_lun            = CMD_PER_LUN,
930         .use_clustering         = DISABLE_CLUSTERING,
931 };
932 #include <linux/module.h>
933 #include "scsi_module.c"
934
935 module_param(ncr_irq, int, 0);
936 module_param(ncr_dma, int, 0);
937 module_param(ncr_addr, int, 0);
938 module_param(ncr_5380, int, 0);
939 module_param(ncr_53c400, int, 0);
940 module_param(ncr_53c400a, int, 0);
941 module_param(dtc_3181e, int, 0);
942 MODULE_LICENSE("GPL");
943
944
945 static struct isapnp_device_id id_table[] __devinitdata = {
946         {
947          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
948          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
949          0},
950         {0}
951 };
952
953 MODULE_DEVICE_TABLE(isapnp, id_table);
954
955
956 __setup("ncr5380=", do_NCR5380_setup);
957 __setup("ncr53c400=", do_NCR53C400_setup);
958 __setup("ncr53c400a=", do_NCR53C400A_setup);
959 __setup("dtc3181e=", do_DTC3181E_setup);