1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Generic Generic NCR5380 driver
4 *
5 * Copyright 1993, Drew Eckhardt
6 * Visionary Computing
7 * (Unix and Linux consulting and custom programming)
8 * drew@colorado.edu
9 * +1 (303) 440-4894
10 *
11 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
12 * K.Lentin@cs.monash.edu.au
13 *
14 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
15 * ingmar@gonzo.schwaben.de
16 *
17 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
18 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
19 *
20 * Added ISAPNP support for DTC436 adapters,
21 * Thomas Sailer, sailer@ife.ee.ethz.ch
22 *
23 * See Documentation/scsi/g_NCR5380.rst for more info.
24 */
25
26 #include <asm/io.h>
27 #include <linux/blkdev.h>
28 #include <linux/module.h>
29 #include <scsi/scsi_host.h>
30 #include <linux/init.h>
31 #include <linux/ioport.h>
32 #include <linux/isa.h>
33 #include <linux/pnp.h>
34 #include <linux/interrupt.h>
35
36 /* Definitions for the core NCR5380 driver. */
37
38 #define NCR5380_read(reg) \
39 ioread8(hostdata->io + hostdata->offset + (reg))
40 #define NCR5380_write(reg, value) \
41 iowrite8(value, hostdata->io + hostdata->offset + (reg))
42
43 #define NCR5380_implementation_fields \
44 int offset; \
45 int c400_ctl_status; \
46 int c400_blk_cnt; \
47 int c400_host_buf; \
48 int io_width; \
49 int pdma_residual; \
50 int board
51
52 #define NCR5380_dma_xfer_len generic_NCR5380_dma_xfer_len
53 #define NCR5380_dma_recv_setup generic_NCR5380_precv
54 #define NCR5380_dma_send_setup generic_NCR5380_psend
55 #define NCR5380_dma_residual generic_NCR5380_dma_residual
56
57 #define NCR5380_intr generic_NCR5380_intr
58 #define NCR5380_queue_command generic_NCR5380_queue_command
59 #define NCR5380_abort generic_NCR5380_abort
60 #define NCR5380_host_reset generic_NCR5380_host_reset
61 #define NCR5380_info generic_NCR5380_info
62
63 #define NCR5380_io_delay(x) udelay(x)
64
65 #include "NCR5380.h"
66
67 #define DRV_MODULE_NAME "g_NCR5380"
68
69 #define NCR53C400_mem_base 0x3880
70 #define NCR53C400_host_buffer 0x3900
71 #define NCR53C400_region_size 0x3a00
72
73 #define BOARD_NCR5380 0
74 #define BOARD_NCR53C400 1
75 #define BOARD_NCR53C400A 2
76 #define BOARD_DTC3181E 3
77 #define BOARD_HP_C2502 4
78
79 #define IRQ_AUTO 254
80
81 #define MAX_CARDS 8
82 #define DMA_MAX_SIZE 32768
83
84 /* old-style parameters for compatibility */
85 static int ncr_irq = -1;
86 static int ncr_addr;
87 static int ncr_5380;
88 static int ncr_53c400;
89 static int ncr_53c400a;
90 static int dtc_3181e;
91 static int hp_c2502;
92 module_param_hw(ncr_irq, int, irq, 0);
93 module_param_hw(ncr_addr, int, ioport, 0);
94 module_param(ncr_5380, int, 0);
95 module_param(ncr_53c400, int, 0);
96 module_param(ncr_53c400a, int, 0);
97 module_param(dtc_3181e, int, 0);
98 module_param(hp_c2502, int, 0);
99
100 static int irq[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
101 module_param_hw_array(irq, int, irq, NULL, 0);
102 MODULE_PARM_DESC(irq, "IRQ number(s) (0=none, 254=auto [default])");
103
104 static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
105 module_param_hw_array(base, int, ioport, NULL, 0);
106 MODULE_PARM_DESC(base, "base address(es)");
107
108 static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
109 module_param_array(card, int, NULL, 0);
110 MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC3181E, 4=HP C2502)");
111
112 MODULE_ALIAS("g_NCR5380_mmio");
113 MODULE_DESCRIPTION("Generic NCR5380/NCR53C400 SCSI driver");
114 MODULE_LICENSE("GPL");
115
g_NCR5380_trigger_irq(struct Scsi_Host * instance)116 static void g_NCR5380_trigger_irq(struct Scsi_Host *instance)
117 {
118 struct NCR5380_hostdata *hostdata = shost_priv(instance);
119
120 /*
121 * An interrupt is triggered whenever BSY = false, SEL = true
122 * and a bit set in the SELECT_ENABLE_REG is asserted on the
123 * SCSI bus.
124 *
125 * Note that the bus is only driven when the phase control signals
126 * (I/O, C/D, and MSG) match those in the TCR.
127 */
128 NCR5380_write(TARGET_COMMAND_REG,
129 PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
130 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
131 NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
132 NCR5380_write(INITIATOR_COMMAND_REG,
133 ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
134
135 msleep(1);
136
137 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
138 NCR5380_write(SELECT_ENABLE_REG, 0);
139 NCR5380_write(TARGET_COMMAND_REG, 0);
140 }
141
142 /**
143 * g_NCR5380_probe_irq - find the IRQ of a NCR5380 or equivalent
144 * @instance: SCSI host instance
145 *
146 * Autoprobe for the IRQ line used by the card by triggering an IRQ
147 * and then looking to see what interrupt actually turned up.
148 */
149
g_NCR5380_probe_irq(struct Scsi_Host * instance)150 static int g_NCR5380_probe_irq(struct Scsi_Host *instance)
151 {
152 struct NCR5380_hostdata *hostdata = shost_priv(instance);
153 int irq_mask, irq;
154
155 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
156 irq_mask = probe_irq_on();
157 g_NCR5380_trigger_irq(instance);
158 irq = probe_irq_off(irq_mask);
159 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
160
161 if (irq <= 0)
162 return NO_IRQ;
163 return irq;
164 }
165
166 /*
167 * Configure I/O address of 53C400A or DTC436 by writing magic numbers
168 * to ports 0x779 and 0x379.
169 */
magic_configure(int idx,u8 irq,u8 magic[])170 static void magic_configure(int idx, u8 irq, u8 magic[])
171 {
172 u8 cfg = 0;
173
174 outb(magic[0], 0x779);
175 outb(magic[1], 0x379);
176 outb(magic[2], 0x379);
177 outb(magic[3], 0x379);
178 outb(magic[4], 0x379);
179
180 if (irq == 9)
181 irq = 2;
182
183 if (idx >= 0 && idx <= 7)
184 cfg = 0x80 | idx | (irq << 4);
185 outb(cfg, 0x379);
186 }
187
legacy_empty_irq_handler(int irq,void * dev_id)188 static irqreturn_t legacy_empty_irq_handler(int irq, void *dev_id)
189 {
190 return IRQ_HANDLED;
191 }
192
legacy_find_free_irq(int * irq_table)193 static int legacy_find_free_irq(int *irq_table)
194 {
195 while (*irq_table != -1) {
196 if (!request_irq(*irq_table, legacy_empty_irq_handler,
197 IRQF_PROBE_SHARED, "Test IRQ",
198 (void *)irq_table)) {
199 free_irq(*irq_table, (void *) irq_table);
200 return *irq_table;
201 }
202 irq_table++;
203 }
204 return -1;
205 }
206
207 static unsigned int ncr_53c400a_ports[] = {
208 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
209 };
210 static unsigned int dtc_3181e_ports[] = {
211 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
212 };
213 static u8 ncr_53c400a_magic[] = { /* 53C400A & DTC436 */
214 0x59, 0xb9, 0xc5, 0xae, 0xa6
215 };
216 static u8 hp_c2502_magic[] = { /* HP C2502 */
217 0x0f, 0x22, 0xf0, 0x20, 0x80
218 };
219 static int hp_c2502_irqs[] = {
220 9, 5, 7, 3, 4, -1
221 };
222
generic_NCR5380_init_one(const struct scsi_host_template * tpnt,struct device * pdev,int base,int irq,int board)223 static int generic_NCR5380_init_one(const struct scsi_host_template *tpnt,
224 struct device *pdev, int base, int irq, int board)
225 {
226 bool is_pmio = base <= 0xffff;
227 int ret;
228 int flags = 0;
229 unsigned int *ports = NULL;
230 u8 *magic = NULL;
231 int i;
232 int port_idx = -1;
233 unsigned long region_size;
234 struct Scsi_Host *instance;
235 struct NCR5380_hostdata *hostdata;
236 u8 __iomem *iomem;
237
238 switch (board) {
239 case BOARD_NCR5380:
240 flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
241 break;
242 case BOARD_NCR53C400A:
243 ports = ncr_53c400a_ports;
244 magic = ncr_53c400a_magic;
245 break;
246 case BOARD_HP_C2502:
247 ports = ncr_53c400a_ports;
248 magic = hp_c2502_magic;
249 break;
250 case BOARD_DTC3181E:
251 ports = dtc_3181e_ports;
252 magic = ncr_53c400a_magic;
253 break;
254 }
255
256 if (is_pmio && ports && magic) {
257 /* wakeup sequence for the NCR53C400A and DTC3181E */
258
259 /* Disable the adapter and look for a free io port */
260 magic_configure(-1, 0, magic);
261
262 region_size = 16;
263 if (base)
264 for (i = 0; ports[i]; i++) {
265 if (base == ports[i]) { /* index found */
266 if (!request_region(ports[i],
267 region_size,
268 "ncr53c80"))
269 return -EBUSY;
270 break;
271 }
272 }
273 else
274 for (i = 0; ports[i]; i++) {
275 if (!request_region(ports[i], region_size,
276 "ncr53c80"))
277 continue;
278 if (inb(ports[i]) == 0xff)
279 break;
280 release_region(ports[i], region_size);
281 }
282 if (ports[i]) {
283 /* At this point we have our region reserved */
284 magic_configure(i, 0, magic); /* no IRQ yet */
285 base = ports[i];
286 outb(0xc0, base + 9);
287 if (inb(base + 9) != 0x80) {
288 ret = -ENODEV;
289 goto out_release;
290 }
291 port_idx = i;
292 } else
293 return -EINVAL;
294 } else if (is_pmio) {
295 /* NCR5380 - no configuration, just grab */
296 region_size = 8;
297 if (!base || !request_region(base, region_size, "ncr5380"))
298 return -EBUSY;
299 } else { /* MMIO */
300 region_size = NCR53C400_region_size;
301 if (!request_mem_region(base, region_size, "ncr5380"))
302 return -EBUSY;
303 }
304
305 if (is_pmio)
306 iomem = ioport_map(base, region_size);
307 else
308 iomem = ioremap(base, region_size);
309
310 if (!iomem) {
311 ret = -ENOMEM;
312 goto out_release;
313 }
314
315 instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
316 if (instance == NULL) {
317 ret = -ENOMEM;
318 goto out_unmap;
319 }
320 hostdata = shost_priv(instance);
321
322 hostdata->board = board;
323 hostdata->io = iomem;
324 hostdata->region_size = region_size;
325
326 if (is_pmio) {
327 hostdata->io_port = base;
328 hostdata->io_width = 1; /* 8-bit PDMA by default */
329 hostdata->offset = 0;
330
331 /*
332 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
333 * the base address.
334 */
335 switch (board) {
336 case BOARD_NCR53C400:
337 hostdata->io_port += 8;
338 hostdata->c400_ctl_status = 0;
339 hostdata->c400_blk_cnt = 1;
340 hostdata->c400_host_buf = 4;
341 break;
342 case BOARD_DTC3181E:
343 hostdata->io_width = 2; /* 16-bit PDMA */
344 fallthrough;
345 case BOARD_NCR53C400A:
346 case BOARD_HP_C2502:
347 hostdata->c400_ctl_status = 9;
348 hostdata->c400_blk_cnt = 10;
349 hostdata->c400_host_buf = 8;
350 break;
351 }
352 } else {
353 hostdata->base = base;
354 hostdata->offset = NCR53C400_mem_base;
355 switch (board) {
356 case BOARD_NCR53C400:
357 hostdata->c400_ctl_status = 0x100;
358 hostdata->c400_blk_cnt = 0x101;
359 hostdata->c400_host_buf = 0x104;
360 break;
361 case BOARD_DTC3181E:
362 case BOARD_NCR53C400A:
363 case BOARD_HP_C2502:
364 pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
365 ret = -EINVAL;
366 goto out_unregister;
367 }
368 }
369
370 /* Check for vacant slot */
371 NCR5380_write(MODE_REG, 0);
372 if (NCR5380_read(MODE_REG) != 0) {
373 ret = -ENODEV;
374 goto out_unregister;
375 }
376
377 ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP);
378 if (ret)
379 goto out_unregister;
380
381 switch (board) {
382 case BOARD_NCR53C400:
383 case BOARD_DTC3181E:
384 case BOARD_NCR53C400A:
385 case BOARD_HP_C2502:
386 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
387 }
388
389 NCR5380_maybe_reset_bus(instance);
390
391 /* Compatibility with documented NCR5380 kernel parameters */
392 if (irq == 255 || irq == 0)
393 irq = NO_IRQ;
394 else if (irq == -1)
395 irq = IRQ_AUTO;
396
397 if (board == BOARD_HP_C2502) {
398 int *irq_table = hp_c2502_irqs;
399 int board_irq = -1;
400
401 switch (irq) {
402 case NO_IRQ:
403 board_irq = 0;
404 break;
405 case IRQ_AUTO:
406 board_irq = legacy_find_free_irq(irq_table);
407 break;
408 default:
409 while (*irq_table != -1)
410 if (*irq_table++ == irq)
411 board_irq = irq;
412 }
413
414 if (board_irq <= 0) {
415 board_irq = 0;
416 irq = NO_IRQ;
417 }
418
419 magic_configure(port_idx, board_irq, magic);
420 }
421
422 if (irq == IRQ_AUTO) {
423 instance->irq = g_NCR5380_probe_irq(instance);
424 if (instance->irq == NO_IRQ)
425 shost_printk(KERN_INFO, instance, "no irq detected\n");
426 } else {
427 instance->irq = irq;
428 if (instance->irq == NO_IRQ)
429 shost_printk(KERN_INFO, instance, "no irq provided\n");
430 }
431
432 if (instance->irq != NO_IRQ) {
433 if (request_irq(instance->irq, generic_NCR5380_intr,
434 0, "NCR5380", instance)) {
435 instance->irq = NO_IRQ;
436 shost_printk(KERN_INFO, instance,
437 "irq %d denied\n", instance->irq);
438 } else {
439 shost_printk(KERN_INFO, instance,
440 "irq %d acquired\n", instance->irq);
441 }
442 }
443
444 ret = scsi_add_host(instance, pdev);
445 if (ret)
446 goto out_free_irq;
447 scsi_scan_host(instance);
448 dev_set_drvdata(pdev, instance);
449 return 0;
450
451 out_free_irq:
452 if (instance->irq != NO_IRQ)
453 free_irq(instance->irq, instance);
454 NCR5380_exit(instance);
455 out_unregister:
456 scsi_host_put(instance);
457 out_unmap:
458 iounmap(iomem);
459 out_release:
460 if (is_pmio)
461 release_region(base, region_size);
462 else
463 release_mem_region(base, region_size);
464 return ret;
465 }
466
generic_NCR5380_release_resources(struct Scsi_Host * instance)467 static void generic_NCR5380_release_resources(struct Scsi_Host *instance)
468 {
469 struct NCR5380_hostdata *hostdata = shost_priv(instance);
470 void __iomem *iomem = hostdata->io;
471 unsigned long io_port = hostdata->io_port;
472 unsigned long base = hostdata->base;
473 unsigned long region_size = hostdata->region_size;
474
475 scsi_remove_host(instance);
476 if (instance->irq != NO_IRQ)
477 free_irq(instance->irq, instance);
478 NCR5380_exit(instance);
479 scsi_host_put(instance);
480 iounmap(iomem);
481 if (io_port)
482 release_region(io_port, region_size);
483 else
484 release_mem_region(base, region_size);
485 }
486
487 /* wait_for_53c80_access - wait for 53C80 registers to become accessible
488 * @hostdata: scsi host private data
489 *
490 * The registers within the 53C80 logic block are inaccessible until
491 * bit 7 in the 53C400 control status register gets asserted.
492 */
493
wait_for_53c80_access(struct NCR5380_hostdata * hostdata)494 static void wait_for_53c80_access(struct NCR5380_hostdata *hostdata)
495 {
496 int count = 10000;
497
498 do {
499 if (hostdata->board == BOARD_DTC3181E)
500 udelay(4); /* DTC436 chip hangs without this */
501 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)
502 return;
503 } while (--count > 0);
504
505 scmd_printk(KERN_ERR, hostdata->connected,
506 "53c80 registers not accessible, device will be reset\n");
507 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET);
508 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
509 }
510
511 /**
512 * generic_NCR5380_precv - pseudo DMA receive
513 * @hostdata: scsi host private data
514 * @dst: buffer to write into
515 * @len: transfer size
516 *
517 * Perform a pseudo DMA mode receive from a 53C400 or equivalent device.
518 */
519
generic_NCR5380_precv(struct NCR5380_hostdata * hostdata,unsigned char * dst,int len)520 static inline int generic_NCR5380_precv(struct NCR5380_hostdata *hostdata,
521 unsigned char *dst, int len)
522 {
523 int residual;
524 int start = 0;
525
526 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR);
527 NCR5380_write(hostdata->c400_blk_cnt, len / 128);
528
529 do {
530 if (start == len - 128) {
531 /* Ignore End of DMA interrupt for the final buffer */
532 if (NCR5380_poll_politely(hostdata, hostdata->c400_ctl_status,
533 CSR_HOST_BUF_NOT_RDY, 0, 0) < 0)
534 break;
535 } else {
536 if (NCR5380_poll_politely2(hostdata, hostdata->c400_ctl_status,
537 CSR_HOST_BUF_NOT_RDY, 0,
538 hostdata->c400_ctl_status,
539 CSR_GATED_53C80_IRQ,
540 CSR_GATED_53C80_IRQ, 0) < 0 ||
541 NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
542 break;
543 }
544
545 if (hostdata->io_port && hostdata->io_width == 2)
546 insw(hostdata->io_port + hostdata->c400_host_buf,
547 dst + start, 64);
548 else if (hostdata->io_port)
549 insb(hostdata->io_port + hostdata->c400_host_buf,
550 dst + start, 128);
551 else
552 memcpy_fromio(dst + start,
553 hostdata->io + NCR53C400_host_buffer, 128);
554 start += 128;
555 } while (start < len);
556
557 residual = len - start;
558
559 if (residual != 0) {
560 /* 53c80 interrupt or transfer timeout. Reset 53c400 logic. */
561 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET);
562 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
563 }
564 wait_for_53c80_access(hostdata);
565
566 if (residual == 0 && NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
567 BASR_END_DMA_TRANSFER,
568 BASR_END_DMA_TRANSFER,
569 0) < 0)
570 scmd_printk(KERN_ERR, hostdata->connected, "%s: End of DMA timeout\n",
571 __func__);
572
573 hostdata->pdma_residual = residual;
574
575 return 0;
576 }
577
578 /**
579 * generic_NCR5380_psend - pseudo DMA send
580 * @hostdata: scsi host private data
581 * @src: buffer to read from
582 * @len: transfer size
583 *
584 * Perform a pseudo DMA mode send to a 53C400 or equivalent device.
585 */
586
generic_NCR5380_psend(struct NCR5380_hostdata * hostdata,unsigned char * src,int len)587 static inline int generic_NCR5380_psend(struct NCR5380_hostdata *hostdata,
588 unsigned char *src, int len)
589 {
590 int residual;
591 int start = 0;
592
593 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
594 NCR5380_write(hostdata->c400_blk_cnt, len / 128);
595
596 do {
597 if (NCR5380_poll_politely2(hostdata, hostdata->c400_ctl_status,
598 CSR_HOST_BUF_NOT_RDY, 0,
599 hostdata->c400_ctl_status,
600 CSR_GATED_53C80_IRQ,
601 CSR_GATED_53C80_IRQ, 0) < 0 ||
602 NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) {
603 /* Both 128 B buffers are in use */
604 if (start >= 128)
605 start -= 128;
606 if (start >= 128)
607 start -= 128;
608 break;
609 }
610
611 if (start >= len && NCR5380_read(hostdata->c400_blk_cnt) == 0)
612 break;
613
614 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
615 /* Host buffer is empty, other one is in use */
616 if (start >= 128)
617 start -= 128;
618 break;
619 }
620
621 if (start >= len)
622 continue;
623
624 if (hostdata->io_port && hostdata->io_width == 2)
625 outsw(hostdata->io_port + hostdata->c400_host_buf,
626 src + start, 64);
627 else if (hostdata->io_port)
628 outsb(hostdata->io_port + hostdata->c400_host_buf,
629 src + start, 128);
630 else
631 memcpy_toio(hostdata->io + NCR53C400_host_buffer,
632 src + start, 128);
633 start += 128;
634 } while (1);
635
636 residual = len - start;
637
638 if (residual != 0) {
639 /* 53c80 interrupt or transfer timeout. Reset 53c400 logic. */
640 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET);
641 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
642 }
643 wait_for_53c80_access(hostdata);
644
645 if (residual == 0) {
646 if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG,
647 TCR_LAST_BYTE_SENT, TCR_LAST_BYTE_SENT,
648 0) < 0)
649 scmd_printk(KERN_ERR, hostdata->connected,
650 "%s: Last Byte Sent timeout\n", __func__);
651
652 if (NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
653 BASR_END_DMA_TRANSFER, BASR_END_DMA_TRANSFER,
654 0) < 0)
655 scmd_printk(KERN_ERR, hostdata->connected, "%s: End of DMA timeout\n",
656 __func__);
657 }
658
659 hostdata->pdma_residual = residual;
660
661 return 0;
662 }
663
generic_NCR5380_dma_xfer_len(struct NCR5380_hostdata * hostdata,struct scsi_cmnd * cmd)664 static int generic_NCR5380_dma_xfer_len(struct NCR5380_hostdata *hostdata,
665 struct scsi_cmnd *cmd)
666 {
667 int transfersize = NCR5380_to_ncmd(cmd)->this_residual;
668
669 if (hostdata->flags & FLAG_NO_PSEUDO_DMA)
670 return 0;
671
672 /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */
673 if (transfersize % 128)
674 return 0;
675
676 /* Limit PDMA send to 512 B to avoid random corruption on DTC3181E */
677 if (hostdata->board == BOARD_DTC3181E &&
678 cmd->sc_data_direction == DMA_TO_DEVICE)
679 transfersize = min(transfersize, 512);
680
681 return min(transfersize, DMA_MAX_SIZE);
682 }
683
generic_NCR5380_dma_residual(struct NCR5380_hostdata * hostdata)684 static int generic_NCR5380_dma_residual(struct NCR5380_hostdata *hostdata)
685 {
686 return hostdata->pdma_residual;
687 }
688
689 /* Include the core driver code. */
690
691 #include "NCR5380.c"
692
693 static const struct scsi_host_template driver_template = {
694 .module = THIS_MODULE,
695 .proc_name = DRV_MODULE_NAME,
696 .name = "Generic NCR5380/NCR53C400 SCSI",
697 .info = generic_NCR5380_info,
698 .queuecommand = generic_NCR5380_queue_command,
699 .eh_abort_handler = generic_NCR5380_abort,
700 .eh_host_reset_handler = generic_NCR5380_host_reset,
701 .can_queue = 16,
702 .this_id = 7,
703 .sg_tablesize = SG_ALL,
704 .cmd_per_lun = 2,
705 .dma_boundary = PAGE_SIZE - 1,
706 .cmd_size = sizeof(struct NCR5380_cmd),
707 .max_sectors = 128,
708 };
709
generic_NCR5380_isa_match(struct device * pdev,unsigned int ndev)710 static int generic_NCR5380_isa_match(struct device *pdev, unsigned int ndev)
711 {
712 int ret = generic_NCR5380_init_one(&driver_template, pdev, base[ndev],
713 irq[ndev], card[ndev]);
714 if (ret) {
715 if (base[ndev])
716 printk(KERN_WARNING "Card not found at address 0x%03x\n",
717 base[ndev]);
718 return 0;
719 }
720
721 return 1;
722 }
723
generic_NCR5380_isa_remove(struct device * pdev,unsigned int ndev)724 static void generic_NCR5380_isa_remove(struct device *pdev,
725 unsigned int ndev)
726 {
727 generic_NCR5380_release_resources(dev_get_drvdata(pdev));
728 dev_set_drvdata(pdev, NULL);
729 }
730
731 static struct isa_driver generic_NCR5380_isa_driver = {
732 .match = generic_NCR5380_isa_match,
733 .remove = generic_NCR5380_isa_remove,
734 .driver = {
735 .name = DRV_MODULE_NAME
736 },
737 };
738
739 #ifdef CONFIG_PNP
740 static const struct pnp_device_id generic_NCR5380_pnp_ids[] = {
741 { .id = "DTC436e", .driver_data = BOARD_DTC3181E },
742 { .id = "" }
743 };
744 MODULE_DEVICE_TABLE(pnp, generic_NCR5380_pnp_ids);
745
generic_NCR5380_pnp_probe(struct pnp_dev * pdev,const struct pnp_device_id * id)746 static int generic_NCR5380_pnp_probe(struct pnp_dev *pdev,
747 const struct pnp_device_id *id)
748 {
749 int base, irq;
750
751 if (pnp_activate_dev(pdev) < 0)
752 return -EBUSY;
753
754 base = pnp_port_start(pdev, 0);
755 irq = pnp_irq(pdev, 0);
756
757 return generic_NCR5380_init_one(&driver_template, &pdev->dev, base, irq,
758 id->driver_data);
759 }
760
generic_NCR5380_pnp_remove(struct pnp_dev * pdev)761 static void generic_NCR5380_pnp_remove(struct pnp_dev *pdev)
762 {
763 generic_NCR5380_release_resources(pnp_get_drvdata(pdev));
764 pnp_set_drvdata(pdev, NULL);
765 }
766
767 static struct pnp_driver generic_NCR5380_pnp_driver = {
768 .name = DRV_MODULE_NAME,
769 .id_table = generic_NCR5380_pnp_ids,
770 .probe = generic_NCR5380_pnp_probe,
771 .remove = generic_NCR5380_pnp_remove,
772 };
773 #endif /* defined(CONFIG_PNP) */
774
775 static int pnp_registered, isa_registered;
776
generic_NCR5380_init(void)777 static int __init generic_NCR5380_init(void)
778 {
779 int ret = 0;
780
781 /* compatibility with old-style parameters */
782 if (irq[0] == -1 && base[0] == 0 && card[0] == -1) {
783 irq[0] = ncr_irq;
784 base[0] = ncr_addr;
785 if (ncr_5380)
786 card[0] = BOARD_NCR5380;
787 if (ncr_53c400)
788 card[0] = BOARD_NCR53C400;
789 if (ncr_53c400a)
790 card[0] = BOARD_NCR53C400A;
791 if (dtc_3181e)
792 card[0] = BOARD_DTC3181E;
793 if (hp_c2502)
794 card[0] = BOARD_HP_C2502;
795 }
796
797 #ifdef CONFIG_PNP
798 if (!pnp_register_driver(&generic_NCR5380_pnp_driver))
799 pnp_registered = 1;
800 #endif
801 ret = isa_register_driver(&generic_NCR5380_isa_driver, MAX_CARDS);
802 if (!ret)
803 isa_registered = 1;
804
805 return (pnp_registered || isa_registered) ? 0 : ret;
806 }
807
generic_NCR5380_exit(void)808 static void __exit generic_NCR5380_exit(void)
809 {
810 #ifdef CONFIG_PNP
811 if (pnp_registered)
812 pnp_unregister_driver(&generic_NCR5380_pnp_driver);
813 #endif
814 if (isa_registered)
815 isa_unregister_driver(&generic_NCR5380_isa_driver);
816 }
817
818 module_init(generic_NCR5380_init);
819 module_exit(generic_NCR5380_exit);
820