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authorFinn Thain <fthain@telegraphics.com.au>2014-03-17 20:42:24 -0400
committerChristoph Hellwig <hch@lst.de>2014-05-28 06:16:28 -0400
commit757f5bad2b748dca6f82e660875320d156485ea5 (patch)
tree546120895d9d01ac96ab9c2c86f4fe135a3ea54a /drivers/scsi/sun3_scsi_vme.c
parent9f6620a318e87d73f8ce3daa7f84efc739d1fa2d (diff)
scsi/NCR5380: merge sun3_scsi_vme.c into sun3_scsi.c
The sun3 drivers suffer from a whole bunch of duplicated code. Fix this by following the g_NCR5380_mmio example. (Notionally, sun3_scsi relates to sun3_scsi_vme in the same way that g_NCR5380 relates to g_NCR5380_mmio.) Dead code is also removed: we now have working debug macros so SUN3_SCSI_DEBUG is undesirable. Dead code within #ifdef OLD_DMA is also dropped, consistent with sun3_scsi_vme.c. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Sam Creasey <sammy@sammy.net> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/sun3_scsi_vme.c')
-rw-r--r--drivers/scsi/sun3_scsi_vme.c583
1 files changed, 1 insertions, 582 deletions
diff --git a/drivers/scsi/sun3_scsi_vme.c b/drivers/scsi/sun3_scsi_vme.c
index 9e7974b56f12..1eeece6e2040 100644
--- a/drivers/scsi/sun3_scsi_vme.c
+++ b/drivers/scsi/sun3_scsi_vme.c
@@ -1,584 +1,3 @@
1 /*
2 * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
3 *
4 * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
5 *
6 * VME support added by Sam Creasey
7 *
8 * Adapted from sun3_scsi.c -- see there for other headers
9 *
10 * TODO: modify this driver to support multiple Sun3 SCSI VME boards
11 *
12 */
13
14#define AUTOSENSE
15
16#include <linux/types.h>
17#include <linux/stddef.h>
18#include <linux/ctype.h>
19#include <linux/delay.h>
20
21#include <linux/module.h>
22#include <linux/signal.h>
23#include <linux/ioport.h>
24#include <linux/init.h>
25#include <linux/blkdev.h>
26
27#include <asm/io.h>
28
29#include <asm/sun3ints.h>
30#include <asm/dvma.h>
31#include <asm/idprom.h>
32#include <asm/machines.h>
33
34#define SUN3_SCSI_VME 1#define SUN3_SCSI_VME
35 2
36#undef SUN3_SCSI_DEBUG 3#include "sun3_scsi.c"
37
38/* dma on! */
39#define REAL_DMA
40
41#include "scsi.h"
42#include "initio.h"
43#include <scsi/scsi_host.h>
44#include "sun3_scsi.h"
45#include "NCR5380.h"
46
47extern int sun3_map_test(unsigned long, char *);
48
49#define USE_WRAPPER
50/*#define RESET_BOOT */
51#define DRIVER_SETUP
52
53/*
54 * BUG can be used to trigger a strange code-size related hang on 2.1 kernels
55 */
56#ifdef BUG
57#undef RESET_BOOT
58#undef DRIVER_SETUP
59#endif
60
61/* #define SUPPORT_TAGS */
62
63//#define ENABLE_IRQ() enable_irq( SUN3_VEC_VMESCSI0 );
64#define ENABLE_IRQ()
65
66
67static irqreturn_t scsi_sun3_intr(int irq, void *dummy);
68static inline unsigned char sun3scsi_read(int reg);
69static inline void sun3scsi_write(int reg, int value);
70
71static int setup_can_queue = -1;
72module_param(setup_can_queue, int, 0);
73static int setup_cmd_per_lun = -1;
74module_param(setup_cmd_per_lun, int, 0);
75static int setup_sg_tablesize = -1;
76module_param(setup_sg_tablesize, int, 0);
77#ifdef SUPPORT_TAGS
78static int setup_use_tagged_queuing = -1;
79module_param(setup_use_tagged_queuing, int, 0);
80#endif
81static int setup_hostid = -1;
82module_param(setup_hostid, int, 0);
83
84static struct scsi_cmnd *sun3_dma_setup_done = NULL;
85
86#define AFTER_RESET_DELAY (HZ/2)
87
88/* ms to wait after hitting dma regs */
89#define SUN3_DMA_DELAY 10
90
91/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
92#define SUN3_DVMA_BUFSIZE 0xe000
93
94/* minimum number of bytes to do dma on */
95#define SUN3_DMA_MINSIZE 128
96
97static volatile unsigned char *sun3_scsi_regp;
98static volatile struct sun3_dma_regs *dregs;
99#ifdef OLDDMA
100static unsigned char *dmabuf = NULL; /* dma memory buffer */
101#endif
102static unsigned char *sun3_dma_orig_addr = NULL;
103static unsigned long sun3_dma_orig_count = 0;
104static int sun3_dma_active = 0;
105static unsigned long last_residual = 0;
106
107/*
108 * NCR 5380 register access functions
109 */
110
111static inline unsigned char sun3scsi_read(int reg)
112{
113 return( sun3_scsi_regp[reg] );
114}
115
116static inline void sun3scsi_write(int reg, int value)
117{
118 sun3_scsi_regp[reg] = value;
119}
120
121/*
122 * XXX: status debug
123 */
124static struct Scsi_Host *default_instance;
125
126/*
127 * Function : int sun3scsi_detect(struct scsi_host_template * tpnt)
128 *
129 * Purpose : initializes mac NCR5380 driver based on the
130 * command line / compile time port and irq definitions.
131 *
132 * Inputs : tpnt - template for this SCSI adapter.
133 *
134 * Returns : 1 if a host adapter was found, 0 if not.
135 *
136 */
137
138static int __init sun3scsi_detect(struct scsi_host_template * tpnt)
139{
140 unsigned long ioaddr, irq = 0;
141 static int called = 0;
142 struct Scsi_Host *instance;
143 int i;
144 unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,
145 IOBASE_SUN3_VMESCSI + 0x4000,
146 0 };
147 unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,
148 SUN3_VEC_VMESCSI1,
149 0 };
150 /* check that this machine has an onboard 5380 */
151 switch(idprom->id_machtype) {
152 case SM_SUN3|SM_3_160:
153 case SM_SUN3|SM_3_260:
154 break;
155
156 default:
157 return 0;
158 }
159
160 if(called)
161 return 0;
162
163 tpnt->proc_name = "Sun3 5380 VME SCSI";
164
165 /* setup variables */
166 tpnt->can_queue =
167 (setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;
168 tpnt->cmd_per_lun =
169 (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;
170 tpnt->sg_tablesize =
171 (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;
172
173 if (setup_hostid >= 0)
174 tpnt->this_id = setup_hostid;
175 else {
176 /* use 7 as default */
177 tpnt->this_id = 7;
178 }
179
180 ioaddr = 0;
181 for(i = 0; addrs[i] != 0; i++) {
182 unsigned char x;
183
184 ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,
185 SUN3_PAGE_TYPE_VME16);
186 irq = vecs[i];
187 sun3_scsi_regp = (unsigned char *)ioaddr;
188
189 dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);
190
191 if(sun3_map_test((unsigned long)dregs, &x)) {
192 unsigned short oldcsr;
193
194 oldcsr = dregs->csr;
195 dregs->csr = 0;
196 udelay(SUN3_DMA_DELAY);
197 if(dregs->csr == 0x1400)
198 break;
199
200 dregs->csr = oldcsr;
201 }
202
203 iounmap((void *)ioaddr);
204 ioaddr = 0;
205 }
206
207 if(!ioaddr)
208 return 0;
209
210#ifdef SUPPORT_TAGS
211 if (setup_use_tagged_queuing < 0)
212 setup_use_tagged_queuing = USE_TAGGED_QUEUING;
213#endif
214
215 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
216 if(instance == NULL)
217 return 0;
218
219 default_instance = instance;
220
221 instance->io_port = (unsigned long) ioaddr;
222 instance->irq = irq;
223
224 NCR5380_init(instance, 0);
225
226 instance->n_io_port = 32;
227
228 ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
229
230 if (request_irq(instance->irq, scsi_sun3_intr,
231 0, "Sun3SCSI-5380VME", instance)) {
232#ifndef REAL_DMA
233 printk("scsi%d: IRQ%d not free, interrupts disabled\n",
234 instance->host_no, instance->irq);
235 instance->irq = SCSI_IRQ_NONE;
236#else
237 printk("scsi%d: IRQ%d not free, bailing out\n",
238 instance->host_no, instance->irq);
239 return 0;
240#endif
241 }
242
243 printk("scsi%d: Sun3 5380 VME at port %lX irq", instance->host_no, instance->io_port);
244 if (instance->irq == SCSI_IRQ_NONE)
245 printk ("s disabled");
246 else
247 printk (" %d", instance->irq);
248 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
249 instance->can_queue, instance->cmd_per_lun,
250 SUN3SCSI_PUBLIC_RELEASE);
251 printk("\nscsi%d:", instance->host_no);
252 NCR5380_print_options(instance);
253 printk("\n");
254
255 dregs->csr = 0;
256 udelay(SUN3_DMA_DELAY);
257 dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
258 udelay(SUN3_DMA_DELAY);
259 dregs->fifo_count = 0;
260 dregs->fifo_count_hi = 0;
261 dregs->dma_addr_hi = 0;
262 dregs->dma_addr_lo = 0;
263 dregs->dma_count_hi = 0;
264 dregs->dma_count_lo = 0;
265
266 dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
267
268 called = 1;
269
270#ifdef RESET_BOOT
271 sun3_scsi_reset_boot(instance);
272#endif
273
274 return 1;
275}
276
277int sun3scsi_release (struct Scsi_Host *shpnt)
278{
279 if (shpnt->irq != SCSI_IRQ_NONE)
280 free_irq(shpnt->irq, shpnt);
281
282 iounmap((void *)sun3_scsi_regp);
283
284 NCR5380_exit(shpnt);
285 return 0;
286}
287
288#ifdef RESET_BOOT
289/*
290 * Our 'bus reset on boot' function
291 */
292
293static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
294{
295 unsigned long end;
296
297 NCR5380_local_declare();
298 NCR5380_setup(instance);
299
300 /*
301 * Do a SCSI reset to clean up the bus during initialization. No
302 * messing with the queues, interrupts, or locks necessary here.
303 */
304
305 printk( "Sun3 SCSI: resetting the SCSI bus..." );
306
307 /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
308// sun3_disable_irq( IRQ_SUN3_SCSI );
309
310 /* get in phase */
311 NCR5380_write( TARGET_COMMAND_REG,
312 PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
313
314 /* assert RST */
315 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
316
317 /* The min. reset hold time is 25us, so 40us should be enough */
318 udelay( 50 );
319
320 /* reset RST and interrupt */
321 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
322 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
323
324 for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
325 barrier();
326
327 /* switch on SCSI IRQ again */
328// sun3_enable_irq( IRQ_SUN3_SCSI );
329
330 printk( " done\n" );
331}
332#endif
333
334static const char * sun3scsi_info (struct Scsi_Host *spnt) {
335 return "";
336}
337
338// safe bits for the CSR
339#define CSR_GOOD 0x060f
340
341static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
342{
343 unsigned short csr = dregs->csr;
344 int handled = 0;
345
346 dregs->csr &= ~CSR_DMA_ENABLE;
347
348
349#ifdef SUN3_SCSI_DEBUG
350 printk("scsi_intr csr %x\n", csr);
351#endif
352
353 if(csr & ~CSR_GOOD) {
354 if(csr & CSR_DMA_BUSERR) {
355 printk("scsi%d: bus error in dma\n", default_instance->host_no);
356#ifdef SUN3_SCSI_DEBUG
357 printk("scsi: residual %x count %x addr %p dmaaddr %x\n",
358 dregs->fifo_count,
359 dregs->dma_count_lo | (dregs->dma_count_hi << 16),
360 sun3_dma_orig_addr,
361 dregs->dma_addr_lo | (dregs->dma_addr_hi << 16));
362#endif
363 }
364
365 if(csr & CSR_DMA_CONFLICT) {
366 printk("scsi%d: dma conflict\n", default_instance->host_no);
367 }
368 handled = 1;
369 }
370
371 if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
372 NCR5380_intr(irq, dummy);
373 handled = 1;
374 }
375
376 return IRQ_RETVAL(handled);
377}
378
379/*
380 * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
381 * reentering NCR5380_print_status seems to have ugly side effects
382 */
383
384/* this doesn't seem to get used at all -- sam */
385#if 0
386void sun3_sun3_debug (void)
387{
388 unsigned long flags;
389 NCR5380_local_declare();
390
391 if (default_instance) {
392 local_irq_save(flags);
393 NCR5380_print_status(default_instance);
394 local_irq_restore(flags);
395 }
396}
397#endif
398
399
400/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
401static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
402{
403 void *addr;
404
405 if(sun3_dma_orig_addr != NULL)
406 dvma_unmap(sun3_dma_orig_addr);
407
408// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);
409 addr = (void *)dvma_map_vme((unsigned long) data, count);
410
411 sun3_dma_orig_addr = addr;
412 sun3_dma_orig_count = count;
413
414#ifdef SUN3_SCSI_DEBUG
415 printk("scsi: dma_setup addr %p count %x\n", addr, count);
416#endif
417
418// dregs->fifo_count = 0;
419#if 0
420 /* reset fifo */
421 dregs->csr &= ~CSR_FIFO;
422 dregs->csr |= CSR_FIFO;
423#endif
424 /* set direction */
425 if(write_flag)
426 dregs->csr |= CSR_SEND;
427 else
428 dregs->csr &= ~CSR_SEND;
429
430 /* reset fifo */
431// dregs->csr &= ~CSR_FIFO;
432// dregs->csr |= CSR_FIFO;
433
434 dregs->csr |= CSR_PACK_ENABLE;
435
436 dregs->dma_addr_hi = ((unsigned long)addr >> 16);
437 dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
438
439 dregs->dma_count_hi = 0;
440 dregs->dma_count_lo = 0;
441 dregs->fifo_count_hi = 0;
442 dregs->fifo_count = 0;
443
444#ifdef SUN3_SCSI_DEBUG
445 printk("scsi: dma_setup done csr %x\n", dregs->csr);
446#endif
447 return count;
448
449}
450
451static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
452{
453 return last_residual;
454}
455
456static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
457 struct scsi_cmnd *cmd,
458 int write_flag)
459{
460 if (cmd->request->cmd_type == REQ_TYPE_FS)
461 return wanted;
462 else
463 return 0;
464}
465
466static int sun3scsi_dma_start(unsigned long count, char *data)
467{
468
469 unsigned short csr;
470
471 csr = dregs->csr;
472#ifdef SUN3_SCSI_DEBUG
473 printk("scsi: dma_start data %p count %x csr %x fifo %x\n", data, count, csr, dregs->fifo_count);
474#endif
475
476 dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
477 dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
478
479 dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
480 dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
481
482// if(!(csr & CSR_DMA_ENABLE))
483// dregs->csr |= CSR_DMA_ENABLE;
484
485 return 0;
486}
487
488/* clean up after our dma is done */
489static int sun3scsi_dma_finish(int write_flag)
490{
491 unsigned short fifo;
492 int ret = 0;
493
494 sun3_dma_active = 0;
495
496 dregs->csr &= ~CSR_DMA_ENABLE;
497
498 fifo = dregs->fifo_count;
499 if(write_flag) {
500 if((fifo > 0) && (fifo < sun3_dma_orig_count))
501 fifo++;
502 }
503
504 last_residual = fifo;
505#ifdef SUN3_SCSI_DEBUG
506 printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count);
507#endif
508 /* empty bytes from the fifo which didn't make it */
509 if((!write_flag) && (dregs->csr & CSR_LEFT)) {
510 unsigned char *vaddr;
511
512#ifdef SUN3_SCSI_DEBUG
513 printk("scsi: got left over bytes\n");
514#endif
515
516 vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
517
518 vaddr += (sun3_dma_orig_count - fifo);
519 vaddr--;
520
521 switch(dregs->csr & CSR_LEFT) {
522 case CSR_LEFT_3:
523 *vaddr = (dregs->bpack_lo & 0xff00) >> 8;
524 vaddr--;
525
526 case CSR_LEFT_2:
527 *vaddr = (dregs->bpack_hi & 0x00ff);
528 vaddr--;
529
530 case CSR_LEFT_1:
531 *vaddr = (dregs->bpack_hi & 0xff00) >> 8;
532 break;
533 }
534
535
536 }
537
538 dvma_unmap(sun3_dma_orig_addr);
539 sun3_dma_orig_addr = NULL;
540
541 dregs->dma_addr_hi = 0;
542 dregs->dma_addr_lo = 0;
543 dregs->dma_count_hi = 0;
544 dregs->dma_count_lo = 0;
545
546 dregs->fifo_count = 0;
547 dregs->fifo_count_hi = 0;
548
549 dregs->csr &= ~CSR_SEND;
550
551// dregs->csr |= CSR_DMA_ENABLE;
552
553#if 0
554 /* reset fifo */
555 dregs->csr &= ~CSR_FIFO;
556 dregs->csr |= CSR_FIFO;
557#endif
558 sun3_dma_setup_done = NULL;
559
560 return ret;
561
562}
563
564#include "sun3_NCR5380.c"
565
566static struct scsi_host_template driver_template = {
567 .name = SUN3_SCSI_NAME,
568 .detect = sun3scsi_detect,
569 .release = sun3scsi_release,
570 .info = sun3scsi_info,
571 .queuecommand = sun3scsi_queue_command,
572 .eh_abort_handler = sun3scsi_abort,
573 .eh_bus_reset_handler = sun3scsi_bus_reset,
574 .can_queue = CAN_QUEUE,
575 .this_id = 7,
576 .sg_tablesize = SG_TABLESIZE,
577 .cmd_per_lun = CMD_PER_LUN,
578 .use_clustering = DISABLE_CLUSTERING
579};
580
581
582#include "scsi_module.c"
583
584MODULE_LICENSE("GPL");
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