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1da177e4 LT |
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 | |
1da177e4 LT |
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 | /* | |
1da177e4 LT |
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 | ||
1da177e4 | 59 | /* settings for DTC3181E card with only Mustek scanner attached */ |
4e5a800c NMG |
60 | #define USLEEP_POLL msecs_to_jiffies(10) |
61 | #define USLEEP_SLEEP msecs_to_jiffies(200) | |
62 | #define USLEEP_WAITLONG msecs_to_jiffies(5000) | |
1da177e4 LT |
63 | |
64 | #define AUTOPROBE_IRQ | |
1da177e4 LT |
65 | |
66 | #ifdef CONFIG_SCSI_GENERIC_NCR53C400 | |
67 | #define NCR53C400_PSEUDO_DMA 1 | |
68 | #define PSEUDO_DMA | |
69 | #define NCR53C400 | |
1da177e4 LT |
70 | #endif |
71 | ||
1da177e4 LT |
72 | #include <asm/io.h> |
73 | #include <linux/signal.h> | |
1da177e4 | 74 | #include <linux/blkdev.h> |
1da177e4 LT |
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 { | |
c818cb64 | 95 | NCR5380_map_type NCR5380_map_name; |
1da177e4 LT |
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 | ||
6391a113 | 106 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
1da177e4 | 107 | |
6391a113 | 108 | #ifndef MODULE |
1da177e4 LT |
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 | ||
6391a113 | 177 | get_options(str, ARRAY_SIZE(ints), ints); |
1da177e4 LT |
178 | internal_setup(BOARD_NCR5380, str, ints); |
179 | return 1; | |
180 | } | |
181 | ||
182 | /** | |
183 | * do_NCR53C400_setup - set up entry point | |
184 | * @str: unused | |
6391a113 | 185 | * @ints: integer parameters from kernel setup code |
1da177e4 LT |
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 | ||
6391a113 | 195 | get_options(str, ARRAY_SIZE(ints), ints); |
1da177e4 LT |
196 | internal_setup(BOARD_NCR53C400, str, ints); |
197 | return 1; | |
198 | } | |
199 | ||
200 | /** | |
201 | * do_NCR53C400A_setup - set up entry point | |
202 | * @str: unused | |
6391a113 | 203 | * @ints: integer parameters from kernel setup code |
1da177e4 LT |
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 | ||
6391a113 | 213 | get_options(str, ARRAY_SIZE(ints), ints); |
1da177e4 LT |
214 | internal_setup(BOARD_NCR53C400A, str, ints); |
215 | return 1; | |
216 | } | |
217 | ||
218 | /** | |
219 | * do_DTC3181E_setup - set up entry point | |
220 | * @str: unused | |
6391a113 | 221 | * @ints: integer parameters from kernel setup code |
1da177e4 LT |
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 | ||
6391a113 | 231 | get_options(str, ARRAY_SIZE(ints), ints); |
1da177e4 LT |
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 | ||
ed8b9e7f | 252 | static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
253 | { |
254 | static int current_override = 0; | |
702a98c6 | 255 | int count; |
1da177e4 | 256 | unsigned int *ports; |
702a98c6 OZ |
257 | #ifndef SCSI_G_NCR5380_MEM |
258 | int i; | |
1da177e4 | 259 | unsigned long region_size = 16; |
702a98c6 | 260 | #endif |
1da177e4 LT |
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; | |
702a98c6 | 269 | #ifdef SCSI_G_NCR5380_MEM |
c818cb64 AV |
270 | unsigned long base; |
271 | void __iomem *iomem; | |
272 | #endif | |
1da177e4 LT |
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; | |
702a98c6 | 288 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
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; | |
c94babba | 295 | if (pnp_device_attach(dev) < 0) |
1da177e4 | 296 | continue; |
1da177e4 LT |
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 | |
22f5f10d | 310 | overrides[count].irq = NO_IRQ; |
1da177e4 LT |
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 | } | |
702a98c6 | 320 | #endif |
1da177e4 LT |
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 | ||
702a98c6 | 345 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
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 | |
c818cb64 AV |
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); | |
1da177e4 | 402 | continue; |
c818cb64 | 403 | } |
1da177e4 LT |
404 | #endif |
405 | instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); | |
406 | if (instance == NULL) { | |
702a98c6 | 407 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
408 | release_region(overrides[current_override].NCR5380_map_name, region_size); |
409 | #else | |
c818cb64 AV |
410 | iounmap(iomem); |
411 | release_mem_region(base, NCR5380_region_size); | |
1da177e4 LT |
412 | #endif |
413 | continue; | |
414 | } | |
415 | ||
416 | instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name; | |
702a98c6 | 417 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 | 418 | instance->n_io_port = region_size; |
c818cb64 | 419 | #else |
702a98c6 | 420 | ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem; |
1da177e4 LT |
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 | ||
22f5f10d FT |
430 | /* Compatibility with documented NCR5380 kernel parameters */ |
431 | if (instance->irq == 255) | |
432 | instance->irq = NO_IRQ; | |
433 | ||
434 | if (instance->irq != NO_IRQ) | |
1e641664 | 435 | if (request_irq(instance->irq, generic_NCR5380_intr, |
4909cc2b | 436 | 0, "NCR5380", instance)) { |
1da177e4 | 437 | printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); |
22f5f10d | 438 | instance->irq = NO_IRQ; |
1da177e4 LT |
439 | } |
440 | ||
22f5f10d | 441 | if (instance->irq == NO_IRQ) { |
1da177e4 LT |
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 | ||
1da177e4 LT |
446 | ++current_override; |
447 | ++count; | |
448 | } | |
449 | return count; | |
450 | } | |
451 | ||
1da177e4 LT |
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 | ||
ed8b9e7f | 461 | static int generic_NCR5380_release_resources(struct Scsi_Host *instance) |
1da177e4 LT |
462 | { |
463 | NCR5380_local_declare(); | |
464 | NCR5380_setup(instance); | |
465 | ||
22f5f10d | 466 | if (instance->irq != NO_IRQ) |
1e641664 | 467 | free_irq(instance->irq, instance); |
1da177e4 LT |
468 | NCR5380_exit(instance); |
469 | ||
702a98c6 | 470 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
471 | release_region(instance->NCR5380_instance_name, instance->n_io_port); |
472 | #else | |
702a98c6 | 473 | iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem); |
1da177e4 LT |
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 | ||
8d9e0f46 | 510 | #ifdef NCR53C400_PSEUDO_DMA |
1da177e4 LT |
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 | * | |
25985edc | 518 | * Perform a pseudo DMA mode read from an NCR53C400 or equivalent |
1da177e4 LT |
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 | ||
702a98c6 | 543 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
544 | { |
545 | int i; | |
546 | for (i = 0; i < 128; i++) | |
547 | dst[start + i] = NCR5380_read(C400_HOST_BUFFER); | |
548 | } | |
549 | #else | |
702a98c6 | 550 | /* implies SCSI_G_NCR5380_MEM */ |
c818cb64 | 551 | memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128); |
1da177e4 LT |
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 | ||
702a98c6 | 563 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
564 | { |
565 | int i; | |
566 | for (i = 0; i < 128; i++) | |
567 | dst[start + i] = NCR5380_read(C400_HOST_BUFFER); | |
568 | } | |
569 | #else | |
702a98c6 | 570 | /* implies SCSI_G_NCR5380_MEM */ |
c818cb64 | 571 | memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128); |
1da177e4 LT |
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 | * | |
25985edc | 602 | * Perform a pseudo DMA mode read from an NCR53C400 or equivalent |
1da177e4 LT |
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 | |
702a98c6 | 629 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
630 | { |
631 | for (i = 0; i < 128; i++) | |
632 | NCR5380_write(C400_HOST_BUFFER, src[start + i]); | |
633 | } | |
634 | #else | |
702a98c6 | 635 | /* implies SCSI_G_NCR5380_MEM */ |
c818cb64 | 636 | memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128); |
1da177e4 LT |
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 | ||
702a98c6 | 645 | #ifndef SCSI_G_NCR5380_MEM |
1da177e4 LT |
646 | { |
647 | for (i = 0; i < 128; i++) | |
648 | NCR5380_write(C400_HOST_BUFFER, src[start + i]); | |
649 | } | |
650 | #else | |
702a98c6 | 651 | /* implies SCSI_G_NCR5380_MEM */ |
c818cb64 | 652 | memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128); |
1da177e4 LT |
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 | ||
d0be4a7d | 698 | static struct scsi_host_template driver_template = { |
dd7ab71b | 699 | .show_info = generic_NCR5380_show_info, |
8c32513b | 700 | .name = "Generic NCR5380/NCR53C400 SCSI", |
1da177e4 LT |
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, | |
1da177e4 LT |
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 | ||
b026e8ed | 726 | #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE) |
6f039790 | 727 | static struct isapnp_device_id id_table[] = { |
1da177e4 LT |
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); | |
702a98c6 | 736 | #endif |
1da177e4 LT |
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); |