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1da177e4 LT |
1 | |
2 | #define AUTOSENSE | |
3 | #define PSEUDO_DMA | |
4 | #define DONT_USE_INTR | |
5 | #define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */ | |
6 | #define xNDEBUG (NDEBUG_INTR+NDEBUG_RESELECTION+\ | |
7 | NDEBUG_SELECTION+NDEBUG_ARBITRATION) | |
8 | #define DMA_WORKS_RIGHT | |
9 | ||
10 | ||
11 | /* | |
12 | * DTC 3180/3280 driver, by | |
13 | * Ray Van Tassle rayvt@comm.mot.com | |
14 | * | |
15 | * taken from ... | |
16 | * Trantor T128/T128F/T228 driver by... | |
17 | * | |
18 | * Drew Eckhardt | |
19 | * Visionary Computing | |
20 | * (Unix and Linux consulting and custom programming) | |
21 | * drew@colorado.edu | |
22 | * +1 (303) 440-4894 | |
23 | * | |
24 | * DISTRIBUTION RELEASE 1. | |
25 | * | |
26 | * For more information, please consult | |
27 | * | |
28 | * NCR 5380 Family | |
29 | * SCSI Protocol Controller | |
30 | * Databook | |
31 | */ | |
32 | ||
33 | /* | |
34 | * Options : | |
35 | * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically | |
36 | * for commands that return with a CHECK CONDITION status. | |
37 | * | |
38 | * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance | |
39 | * increase compared to polled I/O. | |
40 | * | |
41 | * PARITY - enable parity checking. Not supported. | |
42 | * | |
43 | * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. | |
44 | * You probably want this. | |
45 | * | |
46 | * The card is detected and initialized in one of several ways : | |
47 | * 1. Autoprobe (default) - since the board is memory mapped, | |
48 | * a BIOS signature is scanned for to locate the registers. | |
49 | * An interrupt is triggered to autoprobe for the interrupt | |
50 | * line. | |
51 | * | |
52 | * 2. With command line overrides - dtc=address,irq may be | |
53 | * used on the LILO command line to override the defaults. | |
54 | * | |
55 | */ | |
56 | ||
57 | /*----------------------------------------------------------------*/ | |
58 | /* the following will set the monitor border color (useful to find | |
59 | where something crashed or gets stuck at */ | |
60 | /* 1 = blue | |
61 | 2 = green | |
62 | 3 = cyan | |
63 | 4 = red | |
64 | 5 = magenta | |
65 | 6 = yellow | |
66 | 7 = white | |
67 | */ | |
68 | #if 0 | |
69 | #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);} | |
70 | #else | |
71 | #define rtrc(i) {} | |
72 | #endif | |
73 | ||
74 | ||
75 | #include <asm/system.h> | |
76 | #include <linux/module.h> | |
77 | #include <linux/signal.h> | |
78 | #include <linux/sched.h> | |
79 | #include <linux/blkdev.h> | |
80 | #include <linux/delay.h> | |
81 | #include <linux/stat.h> | |
82 | #include <linux/string.h> | |
83 | #include <linux/init.h> | |
84 | #include <linux/interrupt.h> | |
85 | #include <asm/io.h> | |
86 | #include "scsi.h" | |
87 | #include <scsi/scsi_host.h> | |
88 | #include "dtc.h" | |
89 | #define AUTOPROBE_IRQ | |
90 | #include "NCR5380.h" | |
91 | ||
92 | ||
93 | #define DTC_PUBLIC_RELEASE 2 | |
94 | ||
95 | /*#define DTCDEBUG 0x1*/ | |
96 | #define DTCDEBUG_INIT 0x1 | |
97 | #define DTCDEBUG_TRANSFER 0x2 | |
98 | ||
99 | /* | |
100 | * The DTC3180 & 3280 boards are memory mapped. | |
101 | * | |
102 | */ | |
103 | ||
104 | /* | |
105 | */ | |
106 | /* Offset from DTC_5380_OFFSET */ | |
107 | #define DTC_CONTROL_REG 0x100 /* rw */ | |
108 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
109 | #define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */ | |
110 | ||
111 | #define CSR_RESET 0x80 /* wo Resets 53c400 */ | |
112 | #define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */ | |
113 | #define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */ | |
114 | #define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */ | |
115 | #define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */ | |
116 | #define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */ | |
117 | #define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */ | |
118 | #define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */ | |
119 | #define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */ | |
120 | #define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR) | |
121 | ||
122 | ||
123 | #define DTC_BLK_CNT 0x101 /* rw | |
124 | * # of 128-byte blocks to transfer */ | |
125 | ||
126 | ||
127 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
128 | ||
129 | #define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */ | |
130 | #define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer | |
131 | * after disconnect/reconnect*/ | |
132 | ||
133 | #define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */ | |
134 | ||
135 | /*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */ | |
136 | #define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */ | |
137 | ||
138 | static struct override { | |
139 | unsigned int address; | |
140 | int irq; | |
141 | } overrides | |
142 | #ifdef OVERRIDE | |
143 | [] __initdata = OVERRIDE; | |
144 | #else | |
145 | [4] __initdata = { { | |
146 | 0, IRQ_AUTO}, { | |
147 | 0, IRQ_AUTO}, { | |
148 | 0, IRQ_AUTO}, { | |
149 | 0, IRQ_AUTO}}; | |
150 | #endif | |
151 | ||
152 | #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override)) | |
153 | ||
154 | static struct base { | |
155 | unsigned long address; | |
156 | int noauto; | |
157 | } bases[] __initdata = { | |
158 | { 0xcc000, 0 }, | |
159 | { 0xc8000, 0 }, | |
160 | { 0xdc000, 0 }, | |
161 | { 0xd8000, 0 } | |
162 | }; | |
163 | ||
164 | #define NO_BASES (sizeof (bases) / sizeof (struct base)) | |
165 | ||
166 | static const struct signature { | |
167 | const char *string; | |
168 | int offset; | |
169 | } signatures[] = { | |
170 | {"DATA TECHNOLOGY CORPORATION BIOS", 0x25}, | |
171 | }; | |
172 | ||
173 | #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature)) | |
174 | ||
175 | #ifndef MODULE | |
176 | /* | |
177 | * Function : dtc_setup(char *str, int *ints) | |
178 | * | |
179 | * Purpose : LILO command line initialization of the overrides array, | |
180 | * | |
181 | * Inputs : str - unused, ints - array of integer parameters with ints[0] | |
182 | * equal to the number of ints. | |
183 | * | |
184 | */ | |
185 | ||
186 | static void __init dtc_setup(char *str, int *ints) | |
187 | { | |
188 | static int commandline_current = 0; | |
189 | int i; | |
190 | if (ints[0] != 2) | |
191 | printk("dtc_setup: usage dtc=address,irq\n"); | |
192 | else if (commandline_current < NO_OVERRIDES) { | |
193 | overrides[commandline_current].address = ints[1]; | |
194 | overrides[commandline_current].irq = ints[2]; | |
195 | for (i = 0; i < NO_BASES; ++i) | |
196 | if (bases[i].address == ints[1]) { | |
197 | bases[i].noauto = 1; | |
198 | break; | |
199 | } | |
200 | ++commandline_current; | |
201 | } | |
202 | } | |
203 | #endif | |
204 | ||
205 | /* | |
206 | * Function : int dtc_detect(Scsi_Host_Template * tpnt) | |
207 | * | |
208 | * Purpose : detects and initializes DTC 3180/3280 controllers | |
209 | * that were autoprobed, overridden on the LILO command line, | |
210 | * or specified at compile time. | |
211 | * | |
212 | * Inputs : tpnt - template for this SCSI adapter. | |
213 | * | |
214 | * Returns : 1 if a host adapter was found, 0 if not. | |
215 | * | |
216 | */ | |
217 | ||
218 | static int __init dtc_detect(Scsi_Host_Template * tpnt) | |
219 | { | |
220 | static int current_override = 0, current_base = 0; | |
221 | struct Scsi_Host *instance; | |
222 | unsigned int addr; | |
223 | void __iomem *base; | |
224 | int sig, count; | |
225 | ||
226 | tpnt->proc_name = "dtc3x80"; | |
227 | tpnt->proc_info = &dtc_proc_info; | |
228 | ||
229 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { | |
230 | addr = 0; | |
231 | base = NULL; | |
232 | ||
233 | if (overrides[current_override].address) { | |
234 | addr = overrides[current_override].address; | |
235 | base = ioremap(addr, 0x2000); | |
236 | if (!base) | |
237 | addr = 0; | |
238 | } else | |
239 | for (; !addr && (current_base < NO_BASES); ++current_base) { | |
240 | #if (DTCDEBUG & DTCDEBUG_INIT) | |
241 | printk("scsi-dtc : probing address %08x\n", bases[current_base].address); | |
242 | #endif | |
243 | if (bases[current_base].noauto) | |
244 | continue; | |
245 | base = ioremap(bases[current_base].address, 0x2000); | |
246 | if (!base) | |
247 | continue; | |
248 | for (sig = 0; sig < NO_SIGNATURES; ++sig) { | |
249 | if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { | |
250 | addr = bases[current_base].address; | |
251 | #if (DTCDEBUG & DTCDEBUG_INIT) | |
252 | printk("scsi-dtc : detected board.\n"); | |
253 | #endif | |
254 | goto found; | |
255 | } | |
256 | } | |
257 | iounmap(base); | |
258 | } | |
259 | ||
260 | #if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT) | |
261 | printk("scsi-dtc : base = %08x\n", addr); | |
262 | #endif | |
263 | ||
264 | if (!addr) | |
265 | break; | |
266 | ||
267 | found: | |
268 | instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); | |
269 | if (instance == NULL) | |
270 | break; | |
271 | ||
272 | instance->base = addr; | |
273 | ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base; | |
274 | ||
275 | NCR5380_init(instance, 0); | |
276 | ||
277 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */ | |
278 | if (overrides[current_override].irq != IRQ_AUTO) | |
279 | instance->irq = overrides[current_override].irq; | |
280 | else | |
281 | instance->irq = NCR5380_probe_irq(instance, DTC_IRQS); | |
282 | ||
283 | #ifndef DONT_USE_INTR | |
284 | /* With interrupts enabled, it will sometimes hang when doing heavy | |
285 | * reads. So better not enable them until I finger it out. */ | |
286 | if (instance->irq != SCSI_IRQ_NONE) | |
287 | if (request_irq(instance->irq, dtc_intr, SA_INTERRUPT, "dtc", instance)) { | |
288 | printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); | |
289 | instance->irq = SCSI_IRQ_NONE; | |
290 | } | |
291 | ||
292 | if (instance->irq == SCSI_IRQ_NONE) { | |
293 | printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); | |
294 | printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
295 | } | |
296 | #else | |
297 | if (instance->irq != SCSI_IRQ_NONE) | |
298 | printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no); | |
299 | instance->irq = SCSI_IRQ_NONE; | |
300 | #endif | |
301 | #if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT) | |
302 | printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); | |
303 | #endif | |
304 | ||
305 | printk(KERN_INFO "scsi%d : at 0x%05X", instance->host_no, (int) instance->base); | |
306 | if (instance->irq == SCSI_IRQ_NONE) | |
307 | printk(" interrupts disabled"); | |
308 | else | |
309 | printk(" irq %d", instance->irq); | |
310 | printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, DTC_PUBLIC_RELEASE); | |
311 | NCR5380_print_options(instance); | |
312 | printk("\n"); | |
313 | ||
314 | ++current_override; | |
315 | ++count; | |
316 | } | |
317 | return count; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
322 | * | |
323 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
324 | * the specified device / size. | |
325 | * | |
326 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
327 | * major / minor, ip[] = {heads, sectors, cylinders} | |
328 | * | |
329 | * Returns : always 0 (success), initializes ip | |
330 | * | |
331 | */ | |
332 | ||
333 | /* | |
334 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
335 | * using hard disks on a trantor should verify that this mapping corresponds | |
336 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
337 | * and matching the H_C_S coordinates to what DOS uses. | |
338 | */ | |
339 | ||
340 | static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev, | |
341 | sector_t capacity, int *ip) | |
342 | { | |
343 | int size = capacity; | |
344 | ||
345 | ip[0] = 64; | |
346 | ip[1] = 32; | |
347 | ip[2] = size >> 11; | |
348 | return 0; | |
349 | } | |
350 | ||
351 | ||
352 | /**************************************************************** | |
353 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
354 | * unsigned char *dst, int len) | |
355 | * | |
356 | * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to | |
357 | * dst | |
358 | * | |
359 | * Inputs : dst = destination, len = length in bytes | |
360 | * | |
361 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
362 | * timeout. | |
363 | */ | |
364 | ||
365 | static int dtc_maxi = 0; | |
366 | static int dtc_wmaxi = 0; | |
367 | ||
368 | static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) | |
369 | { | |
370 | unsigned char *d = dst; | |
371 | int i; /* For counting time spent in the poll-loop */ | |
372 | NCR5380_local_declare(); | |
373 | NCR5380_setup(instance); | |
374 | ||
375 | i = 0; | |
376 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
377 | NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); | |
378 | if (instance->irq == SCSI_IRQ_NONE) | |
379 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ); | |
380 | else | |
381 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE); | |
382 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
383 | rtrc(1); | |
384 | while (len > 0) { | |
385 | rtrc(2); | |
386 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
387 | ++i; | |
388 | rtrc(3); | |
389 | memcpy_fromio(d, base + DTC_DATA_BUF, 128); | |
390 | d += 128; | |
391 | len -= 128; | |
392 | rtrc(7); | |
393 | /*** with int's on, it sometimes hangs after here. | |
394 | * Looks like something makes HBNR go away. */ | |
395 | } | |
396 | rtrc(4); | |
397 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
398 | ++i; | |
399 | NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ | |
400 | rtrc(0); | |
401 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
402 | if (i > dtc_maxi) | |
403 | dtc_maxi = i; | |
404 | return (0); | |
405 | } | |
406 | ||
407 | /**************************************************************** | |
408 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
409 | * unsigned char *src, int len) | |
410 | * | |
411 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
412 | * src | |
413 | * | |
414 | * Inputs : src = source, len = length in bytes | |
415 | * | |
416 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
417 | * timeout. | |
418 | */ | |
419 | ||
420 | static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) | |
421 | { | |
422 | int i; | |
423 | NCR5380_local_declare(); | |
424 | NCR5380_setup(instance); | |
425 | ||
426 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
427 | NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); | |
428 | /* set direction (write) */ | |
429 | if (instance->irq == SCSI_IRQ_NONE) | |
430 | NCR5380_write(DTC_CONTROL_REG, 0); | |
431 | else | |
432 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); | |
433 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
434 | for (i = 0; len > 0; ++i) { | |
435 | rtrc(5); | |
436 | /* Poll until the host buffer can accept data. */ | |
437 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
438 | ++i; | |
439 | rtrc(3); | |
440 | memcpy_toio(base + DTC_DATA_BUF, src, 128); | |
441 | src += 128; | |
442 | len -= 128; | |
443 | } | |
444 | rtrc(4); | |
445 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
446 | ++i; | |
447 | rtrc(6); | |
448 | /* Wait until the last byte has been sent to the disk */ | |
449 | while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) | |
450 | ++i; | |
451 | rtrc(7); | |
452 | /* Check for parity error here. fixme. */ | |
453 | NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ | |
454 | rtrc(0); | |
455 | if (i > dtc_wmaxi) | |
456 | dtc_wmaxi = i; | |
457 | return (0); | |
458 | } | |
459 | ||
460 | MODULE_LICENSE("GPL"); | |
461 | ||
462 | #include "NCR5380.c" | |
463 | ||
464 | static int dtc_release(struct Scsi_Host *shost) | |
465 | { | |
466 | NCR5380_local_declare(); | |
467 | NCR5380_setup(shost); | |
468 | if (shost->irq) | |
469 | free_irq(shost->irq, NULL); | |
470 | NCR5380_exit(shost); | |
471 | if (shost->io_port && shost->n_io_port) | |
472 | release_region(shost->io_port, shost->n_io_port); | |
473 | scsi_unregister(shost); | |
474 | iounmap(base); | |
475 | return 0; | |
476 | } | |
477 | ||
478 | static Scsi_Host_Template driver_template = { | |
479 | .name = "DTC 3180/3280 ", | |
480 | .detect = dtc_detect, | |
481 | .release = dtc_release, | |
482 | .queuecommand = dtc_queue_command, | |
483 | .eh_abort_handler = dtc_abort, | |
484 | .eh_bus_reset_handler = dtc_bus_reset, | |
485 | .eh_device_reset_handler = dtc_device_reset, | |
486 | .eh_host_reset_handler = dtc_host_reset, | |
487 | .bios_param = dtc_biosparam, | |
488 | .can_queue = CAN_QUEUE, | |
489 | .this_id = 7, | |
490 | .sg_tablesize = SG_ALL, | |
491 | .cmd_per_lun = CMD_PER_LUN, | |
492 | .use_clustering = DISABLE_CLUSTERING, | |
493 | }; | |
494 | #include "scsi_module.c" |