Merge tag 'v4.1-rc1' into patchwork
[firefly-linux-kernel-4.4.55.git] / 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
23 /* 
24  * TODO : flesh out DMA support, find some one actually using this (I have
25  *      a memory mapped Trantor board that works fine)
26  */
27
28 /*
29  * The card is detected and initialized in one of several ways : 
30  * 1.  With command line overrides - NCR5380=port,irq may be 
31  *     used on the LILO command line to override the defaults.
32  *
33  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is 
34  *     specified as an array of address, irq, dma, board tuples.  Ie, for
35  *     one board at 0x350, IRQ5, no dma, I could say  
36  *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
37  * 
38  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an 
39  *      IRQ line if overridden on the command line.
40  *
41  * 3.  When included as a module, with arguments passed on the command line:
42  *         ncr_irq=xx   the interrupt
43  *         ncr_addr=xx  the port or base address (for port or memory
44  *                      mapped, resp.)
45  *         ncr_dma=xx   the DMA
46  *         ncr_5380=1   to set up for a NCR5380 board
47  *         ncr_53c400=1 to set up for a NCR53C400 board
48  *     e.g.
49  *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
50  *       for a port mapped NCR5380 board or
51  *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
52  *       for a memory mapped NCR53C400 board with interrupts disabled.
53  * 
54  * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
55  *      IRQ line if overridden on the command line.
56  *     
57  */
58
59 /* settings for DTC3181E card with only Mustek scanner attached */
60 #define USLEEP_POLL     msecs_to_jiffies(10)
61 #define USLEEP_SLEEP    msecs_to_jiffies(200)
62 #define USLEEP_WAITLONG msecs_to_jiffies(5000)
63
64 #define AUTOPROBE_IRQ
65
66 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
67 #define NCR53C400_PSEUDO_DMA 1
68 #define PSEUDO_DMA
69 #define NCR53C400
70 #endif
71
72 #include <asm/io.h>
73 #include <linux/signal.h>
74 #include <linux/blkdev.h>
75 #include <scsi/scsi_host.h>
76 #include "g_NCR5380.h"
77 #include "NCR5380.h"
78 #include <linux/stat.h>
79 #include <linux/init.h>
80 #include <linux/ioport.h>
81 #include <linux/isapnp.h>
82 #include <linux/delay.h>
83 #include <linux/interrupt.h>
84
85 #define NCR_NOT_SET 0
86 static int ncr_irq = NCR_NOT_SET;
87 static int ncr_dma = NCR_NOT_SET;
88 static int ncr_addr = NCR_NOT_SET;
89 static int ncr_5380 = NCR_NOT_SET;
90 static int ncr_53c400 = NCR_NOT_SET;
91 static int ncr_53c400a = NCR_NOT_SET;
92 static int dtc_3181e = NCR_NOT_SET;
93
94 static struct override {
95         NCR5380_map_type NCR5380_map_name;
96         int irq;
97         int dma;
98         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
99 } overrides
100 #ifdef GENERIC_NCR5380_OVERRIDE
101 [] __initdata = GENERIC_NCR5380_OVERRIDE;
102 #else
103 [1] __initdata = { { 0,},};
104 #endif
105
106 #define NO_OVERRIDES ARRAY_SIZE(overrides)
107
108 #ifndef MODULE
109
110 /**
111  *      internal_setup          -       handle lilo command string override
112  *      @board: BOARD_* identifier for the board
113  *      @str: unused
114  *      @ints: numeric parameters
115  *
116  *      Do LILO command line initialization of the overrides array. Display
117  *      errors when needed
118  *
119  *      Locks: none
120  */
121
122 static void __init internal_setup(int board, char *str, int *ints)
123 {
124         static int commandline_current = 0;
125         switch (board) {
126         case BOARD_NCR5380:
127                 if (ints[0] != 2 && ints[0] != 3) {
128                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
129                         return;
130                 }
131                 break;
132         case BOARD_NCR53C400:
133                 if (ints[0] != 2) {
134                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
135                         return;
136                 }
137                 break;
138         case BOARD_NCR53C400A:
139                 if (ints[0] != 2) {
140                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
141                         return;
142                 }
143                 break;
144         case BOARD_DTC3181E:
145                 if (ints[0] != 2) {
146                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
147                         return;
148                 }
149                 break;
150         }
151
152         if (commandline_current < NO_OVERRIDES) {
153                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
154                 overrides[commandline_current].irq = ints[2];
155                 if (ints[0] == 3)
156                         overrides[commandline_current].dma = ints[3];
157                 else
158                         overrides[commandline_current].dma = DMA_NONE;
159                 overrides[commandline_current].board = board;
160                 ++commandline_current;
161         }
162 }
163
164
165 /**
166  *      do_NCR53C80_setup               -       set up entry point
167  *      @str: unused
168  *
169  *      Setup function invoked at boot to parse the ncr5380= command
170  *      line.
171  */
172
173 static int __init do_NCR5380_setup(char *str)
174 {
175         int ints[10];
176
177         get_options(str, ARRAY_SIZE(ints), ints);
178         internal_setup(BOARD_NCR5380, str, ints);
179         return 1;
180 }
181
182 /**
183  *      do_NCR53C400_setup              -       set up entry point
184  *      @str: unused
185  *      @ints: integer parameters from kernel setup code
186  *
187  *      Setup function invoked at boot to parse the ncr53c400= command
188  *      line.
189  */
190
191 static int __init do_NCR53C400_setup(char *str)
192 {
193         int ints[10];
194
195         get_options(str, ARRAY_SIZE(ints), ints);
196         internal_setup(BOARD_NCR53C400, str, ints);
197         return 1;
198 }
199
200 /**
201  *      do_NCR53C400A_setup     -       set up entry point
202  *      @str: unused
203  *      @ints: integer parameters from kernel setup code
204  *
205  *      Setup function invoked at boot to parse the ncr53c400a= command
206  *      line.
207  */
208
209 static int __init do_NCR53C400A_setup(char *str)
210 {
211         int ints[10];
212
213         get_options(str, ARRAY_SIZE(ints), ints);
214         internal_setup(BOARD_NCR53C400A, str, ints);
215         return 1;
216 }
217
218 /**
219  *      do_DTC3181E_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 dtc3181e= command
224  *      line.
225  */
226
227 static int __init do_DTC3181E_setup(char *str)
228 {
229         int ints[10];
230
231         get_options(str, ARRAY_SIZE(ints), ints);
232         internal_setup(BOARD_DTC3181E, str, ints);
233         return 1;
234 }
235
236 #endif
237
238 /**
239  *      generic_NCR5380_detect  -       look for NCR5380 controllers
240  *      @tpnt: the scsi template
241  *
242  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
243  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
244  *      them.
245  *
246  *      The caller supplied NCR5380_init function is invoked from here, before
247  *      the interrupt line is taken.
248  *
249  *      Locks: none
250  */
251
252 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
253 {
254         static int current_override = 0;
255         int count;
256         unsigned int *ports;
257 #ifndef SCSI_G_NCR5380_MEM
258         int i;
259         unsigned long region_size = 16;
260 #endif
261         static unsigned int __initdata ncr_53c400a_ports[] = {
262                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
263         };
264         static unsigned int __initdata dtc_3181e_ports[] = {
265                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
266         };
267         int flags = 0;
268         struct Scsi_Host *instance;
269 #ifdef SCSI_G_NCR5380_MEM
270         unsigned long base;
271         void __iomem *iomem;
272 #endif
273
274         if (ncr_irq != NCR_NOT_SET)
275                 overrides[0].irq = ncr_irq;
276         if (ncr_dma != NCR_NOT_SET)
277                 overrides[0].dma = ncr_dma;
278         if (ncr_addr != NCR_NOT_SET)
279                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
280         if (ncr_5380 != NCR_NOT_SET)
281                 overrides[0].board = BOARD_NCR5380;
282         else if (ncr_53c400 != NCR_NOT_SET)
283                 overrides[0].board = BOARD_NCR53C400;
284         else if (ncr_53c400a != NCR_NOT_SET)
285                 overrides[0].board = BOARD_NCR53C400A;
286         else if (dtc_3181e != NCR_NOT_SET)
287                 overrides[0].board = BOARD_DTC3181E;
288 #ifndef SCSI_G_NCR5380_MEM
289         if (!current_override && isapnp_present()) {
290                 struct pnp_dev *dev = NULL;
291                 count = 0;
292                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
293                         if (count >= NO_OVERRIDES)
294                                 break;
295                         if (pnp_device_attach(dev) < 0)
296                                 continue;
297                         if (pnp_activate_dev(dev) < 0) {
298                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
299                                 pnp_device_detach(dev);
300                                 continue;
301                         }
302                         if (!pnp_port_valid(dev, 0)) {
303                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
304                                 pnp_device_detach(dev);
305                                 continue;
306                         }
307                         if (pnp_irq_valid(dev, 0))
308                                 overrides[count].irq = pnp_irq(dev, 0);
309                         else
310                                 overrides[count].irq = NO_IRQ;
311                         if (pnp_dma_valid(dev, 0))
312                                 overrides[count].dma = pnp_dma(dev, 0);
313                         else
314                                 overrides[count].dma = DMA_NONE;
315                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
316                         overrides[count].board = BOARD_DTC3181E;
317                         count++;
318                 }
319         }
320 #endif
321         tpnt->proc_name = "g_NCR5380";
322
323         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
324                 if (!(overrides[current_override].NCR5380_map_name))
325                         continue;
326
327                 ports = NULL;
328                 switch (overrides[current_override].board) {
329                 case BOARD_NCR5380:
330                         flags = FLAG_NO_PSEUDO_DMA;
331                         break;
332                 case BOARD_NCR53C400:
333                         flags = FLAG_NCR53C400;
334                         break;
335                 case BOARD_NCR53C400A:
336                         flags = FLAG_NO_PSEUDO_DMA;
337                         ports = ncr_53c400a_ports;
338                         break;
339                 case BOARD_DTC3181E:
340                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
341                         ports = dtc_3181e_ports;
342                         break;
343                 }
344
345 #ifndef SCSI_G_NCR5380_MEM
346                 if (ports) {
347                         /* wakeup sequence for the NCR53C400A and DTC3181E */
348
349                         /* Disable the adapter and look for a free io port */
350                         outb(0x59, 0x779);
351                         outb(0xb9, 0x379);
352                         outb(0xc5, 0x379);
353                         outb(0xae, 0x379);
354                         outb(0xa6, 0x379);
355                         outb(0x00, 0x379);
356
357                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
358                                 for (i = 0; ports[i]; i++) {
359                                         if (!request_region(ports[i],  16, "ncr53c80"))
360                                                 continue;
361                                         if (overrides[current_override].NCR5380_map_name == ports[i])
362                                                 break;
363                                         release_region(ports[i], 16);
364                         } else
365                                 for (i = 0; ports[i]; i++) {
366                                         if (!request_region(ports[i],  16, "ncr53c80"))
367                                                 continue;
368                                         if (inb(ports[i]) == 0xff)
369                                                 break;
370                                         release_region(ports[i], 16);
371                                 }
372                         if (ports[i]) {
373                                 /* At this point we have our region reserved */
374                                 outb(0x59, 0x779);
375                                 outb(0xb9, 0x379);
376                                 outb(0xc5, 0x379);
377                                 outb(0xae, 0x379);
378                                 outb(0xa6, 0x379);
379                                 outb(0x80 | i, 0x379);  /* set io port to be used */
380                                 outb(0xc0, ports[i] + 9);
381                                 if (inb(ports[i] + 9) != 0x80)
382                                         continue;
383                                 else
384                                         overrides[current_override].NCR5380_map_name = ports[i];
385                         } else
386                                 continue;
387                 }
388                 else
389                 {
390                         /* Not a 53C400A style setup - just grab */
391                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
392                                 continue;
393                         region_size = NCR5380_region_size;
394                 }
395 #else
396                 base = overrides[current_override].NCR5380_map_name;
397                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
398                         continue;
399                 iomem = ioremap(base, NCR5380_region_size);
400                 if (!iomem) {
401                         release_mem_region(base, NCR5380_region_size);
402                         continue;
403                 }
404 #endif
405                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
406                 if (instance == NULL) {
407 #ifndef SCSI_G_NCR5380_MEM
408                         release_region(overrides[current_override].NCR5380_map_name, region_size);
409 #else
410                         iounmap(iomem);
411                         release_mem_region(base, NCR5380_region_size);
412 #endif
413                         continue;
414                 }
415
416                 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
417 #ifndef SCSI_G_NCR5380_MEM
418                 instance->n_io_port = region_size;
419 #else
420                 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
421 #endif
422
423                 NCR5380_init(instance, flags);
424
425                 if (overrides[current_override].irq != IRQ_AUTO)
426                         instance->irq = overrides[current_override].irq;
427                 else
428                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
429
430                 /* Compatibility with documented NCR5380 kernel parameters */
431                 if (instance->irq == 255)
432                         instance->irq = NO_IRQ;
433
434                 if (instance->irq != NO_IRQ)
435                         if (request_irq(instance->irq, generic_NCR5380_intr,
436                                         0, "NCR5380", instance)) {
437                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
438                                 instance->irq = NO_IRQ;
439                         }
440
441                 if (instance->irq == NO_IRQ) {
442                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
443                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
444                 }
445
446                 ++current_override;
447                 ++count;
448         }
449         return count;
450 }
451
452 /**
453  *      generic_NCR5380_release_resources       -       free resources
454  *      @instance: host adapter to clean up 
455  *
456  *      Free the generic interface resources from this adapter.
457  *
458  *      Locks: none
459  */
460  
461 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
462 {
463         NCR5380_local_declare();
464         NCR5380_setup(instance);
465         
466         if (instance->irq != NO_IRQ)
467                 free_irq(instance->irq, instance);
468         NCR5380_exit(instance);
469
470 #ifndef SCSI_G_NCR5380_MEM
471         release_region(instance->NCR5380_instance_name, instance->n_io_port);
472 #else
473         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
474         release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
475 #endif
476
477
478         return 0;
479 }
480
481 #ifdef BIOSPARAM
482 /**
483  *      generic_NCR5380_biosparam
484  *      @disk: disk to compute geometry for
485  *      @dev: device identifier for this disk
486  *      @ip: sizes to fill in
487  *
488  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified 
489  *      device / size.
490  * 
491  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
492  *      using hard disks on a trantor should verify that this mapping
493  *      corresponds to that used by the BIOS / ASPI driver by running the linux
494  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
495  *
496  *      Locks: none
497  */
498
499 static int
500 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
501                           sector_t capacity, int *ip)
502 {
503         ip[0] = 64;
504         ip[1] = 32;
505         ip[2] = capacity >> 11;
506         return 0;
507 }
508 #endif
509
510 #ifdef NCR53C400_PSEUDO_DMA
511
512 /**
513  *      NCR5380_pread           -       pseudo DMA read
514  *      @instance: adapter to read from
515  *      @dst: buffer to read into
516  *      @len: buffer length
517  *
518  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
519  *      controller
520  */
521  
522 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
523 {
524         int blocks = len / 128;
525         int start = 0;
526         int bl;
527
528         NCR5380_local_declare();
529         NCR5380_setup(instance);
530
531         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
532         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
533         while (1) {
534                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
535                         break;
536                 }
537                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
538                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
539                         return -1;
540                 }
541                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
542
543 #ifndef SCSI_G_NCR5380_MEM
544                 {
545                         int i;
546                         for (i = 0; i < 128; i++)
547                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
548                 }
549 #else
550                 /* implies SCSI_G_NCR5380_MEM */
551                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
552 #endif
553                 start += 128;
554                 blocks--;
555         }
556
557         if (blocks) {
558                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
559                 {
560                         // FIXME - no timeout
561                 }
562
563 #ifndef SCSI_G_NCR5380_MEM
564                 {
565                         int i;  
566                         for (i = 0; i < 128; i++)
567                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
568                 }
569 #else
570                 /* implies SCSI_G_NCR5380_MEM */
571                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
572 #endif
573                 start += 128;
574                 blocks--;
575         }
576
577         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
578                 printk("53C400r: no 53C80 gated irq after transfer");
579
580 #if 0
581         /*
582          *      DON'T DO THIS - THEY NEVER ARRIVE!
583          */
584         printk("53C400r: Waiting for 53C80 registers\n");
585         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
586                 ;
587 #endif
588         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
589                 printk(KERN_ERR "53C400r: no end dma signal\n");
590                 
591         NCR5380_write(MODE_REG, MR_BASE);
592         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
593         return 0;
594 }
595
596 /**
597  *      NCR5380_write           -       pseudo DMA write
598  *      @instance: adapter to read from
599  *      @dst: buffer to read into
600  *      @len: buffer length
601  *
602  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
603  *      controller
604  */
605
606 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
607 {
608         int blocks = len / 128;
609         int start = 0;
610         int bl;
611         int i;
612
613         NCR5380_local_declare();
614         NCR5380_setup(instance);
615
616         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
617         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
618         while (1) {
619                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
620                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
621                         return -1;
622                 }
623
624                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
625                         break;
626                 }
627                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
628                         ; // FIXME - timeout
629 #ifndef SCSI_G_NCR5380_MEM
630                 {
631                         for (i = 0; i < 128; i++)
632                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
633                 }
634 #else
635                 /* implies SCSI_G_NCR5380_MEM */
636                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
637 #endif
638                 start += 128;
639                 blocks--;
640         }
641         if (blocks) {
642                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
643                         ; // FIXME - no timeout
644
645 #ifndef SCSI_G_NCR5380_MEM
646                 {
647                         for (i = 0; i < 128; i++)
648                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
649                 }
650 #else
651                 /* implies SCSI_G_NCR5380_MEM */
652                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
653 #endif
654                 start += 128;
655                 blocks--;
656         }
657
658 #if 0
659         printk("53C400w: waiting for registers to be available\n");
660         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
661         printk("53C400w: Got em\n");
662 #endif
663
664         /* Let's wait for this instead - could be ugly */
665         /* All documentation says to check for this. Maybe my hardware is too
666          * fast. Waiting for it seems to work fine! KLL
667          */
668         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
669                 ;       // FIXME - no timeout
670
671         /*
672          * I know. i is certainly != 0 here but the loop is new. See previous
673          * comment.
674          */
675         if (i) {
676                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
677                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
678         } else
679                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
680
681 #if 0
682         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
683                 printk(KERN_ERR "53C400w: no end dma signal\n");
684         }
685 #endif
686         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
687                 ;       // TIMEOUT
688         return 0;
689 }
690 #endif                          /* PSEUDO_DMA */
691
692 /*
693  *      Include the NCR5380 core code that we build our driver around   
694  */
695  
696 #include "NCR5380.c"
697
698 static struct scsi_host_template driver_template = {
699         .show_info              = generic_NCR5380_show_info,
700         .name                   = "Generic NCR5380/NCR53C400 SCSI",
701         .detect                 = generic_NCR5380_detect,
702         .release                = generic_NCR5380_release_resources,
703         .info                   = generic_NCR5380_info,
704         .queuecommand           = generic_NCR5380_queue_command,
705         .eh_abort_handler       = generic_NCR5380_abort,
706         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
707         .bios_param             = NCR5380_BIOSPARAM,
708         .can_queue              = CAN_QUEUE,
709         .this_id                = 7,
710         .sg_tablesize           = SG_ALL,
711         .cmd_per_lun            = CMD_PER_LUN,
712         .use_clustering         = DISABLE_CLUSTERING,
713 };
714 #include <linux/module.h>
715 #include "scsi_module.c"
716
717 module_param(ncr_irq, int, 0);
718 module_param(ncr_dma, int, 0);
719 module_param(ncr_addr, int, 0);
720 module_param(ncr_5380, int, 0);
721 module_param(ncr_53c400, int, 0);
722 module_param(ncr_53c400a, int, 0);
723 module_param(dtc_3181e, int, 0);
724 MODULE_LICENSE("GPL");
725
726 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
727 static struct isapnp_device_id id_table[] = {
728         {
729          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
730          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
731          0},
732         {0}
733 };
734
735 MODULE_DEVICE_TABLE(isapnp, id_table);
736 #endif
737
738 __setup("ncr5380=", do_NCR5380_setup);
739 __setup("ncr53c400=", do_NCR53C400_setup);
740 __setup("ncr53c400a=", do_NCR53C400A_setup);
741 __setup("dtc3181e=", do_DTC3181E_setup);