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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
3 *
4 * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
5 *
Finn Thain757f5ba2014-03-18 11:42:24 +11006 * VME support added by Sam Creasey
7 *
8 * TODO: modify this driver to support multiple Sun3 SCSI VME boards
9 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * Adapted from mac_scsinew.c:
11 */
12/*
13 * Generic Macintosh NCR5380 driver
14 *
15 * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov>
16 *
17 * derived in part from:
18 */
19/*
20 * Generic Generic NCR5380 driver
21 *
22 * Copyright 1995, Russell King
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 */
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/ioport.h>
29#include <linux/init.h>
30#include <linux/blkdev.h>
Finn Thain0d31f872014-11-13 12:21:28 +110031#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <asm/dvma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <scsi/scsi_host.h>
37#include "sun3_scsi.h"
Finn Thain2231ef82014-11-12 16:12:12 +110038
39/* Definitions for the core NCR5380 driver. */
40
41#define REAL_DMA
Finn Thain2231ef82014-11-12 16:12:12 +110042/* #define SUPPORT_TAGS */
Finn Thain8dad0c52014-11-12 16:12:17 +110043/* minimum number of bytes to do dma on */
44#define DMA_MIN_SIZE 129
Finn Thain2231ef82014-11-12 16:12:12 +110045
46/* #define MAX_TAGS 32 */
47
48#define NCR5380_implementation_fields /* none */
49
50#define NCR5380_read(reg) sun3scsi_read(reg)
51#define NCR5380_write(reg, value) sun3scsi_write(reg, value)
52
53#define NCR5380_queue_command sun3scsi_queue_command
54#define NCR5380_bus_reset sun3scsi_bus_reset
55#define NCR5380_abort sun3scsi_abort
56#define NCR5380_show_info sun3scsi_show_info
57#define NCR5380_info sun3scsi_info
58
59#define NCR5380_dma_read_setup(instance, data, count) \
60 sun3scsi_dma_setup(data, count, 0)
61#define NCR5380_dma_write_setup(instance, data, count) \
62 sun3scsi_dma_setup(data, count, 1)
63#define NCR5380_dma_residual(instance) \
64 sun3scsi_dma_residual(instance)
65#define NCR5380_dma_xfer_len(instance, cmd, phase) \
66 sun3scsi_dma_xfer_len(cmd->SCp.this_residual, cmd, !((phase) & SR_IO))
67
Finn Thain8dad0c52014-11-12 16:12:17 +110068#define NCR5380_acquire_dma_irq(instance) (1)
69#define NCR5380_release_dma_irq(instance)
70
Finn Thain9f6620a2014-03-18 11:42:23 +110071#include "NCR5380.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Finn Thain2231ef82014-11-12 16:12:12 +110074extern int sun3_map_test(unsigned long, char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076static int setup_can_queue = -1;
77module_param(setup_can_queue, int, 0);
78static int setup_cmd_per_lun = -1;
79module_param(setup_cmd_per_lun, int, 0);
80static int setup_sg_tablesize = -1;
81module_param(setup_sg_tablesize, int, 0);
82#ifdef SUPPORT_TAGS
83static int setup_use_tagged_queuing = -1;
84module_param(setup_use_tagged_queuing, int, 0);
85#endif
86static int setup_hostid = -1;
87module_param(setup_hostid, int, 0);
88
Finn Thain2231ef82014-11-12 16:12:12 +110089/* #define RESET_BOOT */
Michael Schmitz2b0f8342014-05-02 20:43:01 +120090
Linus Torvalds1da177e2005-04-16 15:20:36 -070091#define AFTER_RESET_DELAY (HZ/2)
92
93/* ms to wait after hitting dma regs */
94#define SUN3_DMA_DELAY 10
95
96/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
97#define SUN3_DVMA_BUFSIZE 0xe000
98
Finn Thain2231ef82014-11-12 16:12:12 +110099static struct scsi_cmnd *sun3_dma_setup_done;
Finn Thain0d31f872014-11-13 12:21:28 +1100100static unsigned char *sun3_scsi_regp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101static volatile struct sun3_dma_regs *dregs;
Finn Thain0d31f872014-11-13 12:21:28 +1100102static struct sun3_udc_regs *udc_regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103static unsigned char *sun3_dma_orig_addr = NULL;
104static unsigned long sun3_dma_orig_count = 0;
105static int sun3_dma_active = 0;
106static unsigned long last_residual = 0;
Finn Thain0d31f872014-11-13 12:21:28 +1100107static struct Scsi_Host *default_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109/*
110 * NCR 5380 register access functions
111 */
112
113static inline unsigned char sun3scsi_read(int reg)
114{
Finn Thain0d31f872014-11-13 12:21:28 +1100115 return in_8(sun3_scsi_regp + reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
117
118static inline void sun3scsi_write(int reg, int value)
119{
Finn Thain0d31f872014-11-13 12:21:28 +1100120 out_8(sun3_scsi_regp + reg, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121}
122
Finn Thain757f5ba2014-03-18 11:42:24 +1100123#ifndef SUN3_SCSI_VME
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124/* dma controller register access functions */
125
126static inline unsigned short sun3_udc_read(unsigned char reg)
127{
128 unsigned short ret;
129
130 dregs->udc_addr = UDC_CSR;
131 udelay(SUN3_DMA_DELAY);
132 ret = dregs->udc_data;
133 udelay(SUN3_DMA_DELAY);
134
135 return ret;
136}
137
138static inline void sun3_udc_write(unsigned short val, unsigned char reg)
139{
140 dregs->udc_addr = reg;
141 udelay(SUN3_DMA_DELAY);
142 dregs->udc_data = val;
143 udelay(SUN3_DMA_DELAY);
144}
Finn Thain757f5ba2014-03-18 11:42:24 +1100145#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147#ifdef RESET_BOOT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
149{
150 unsigned long end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152 /*
153 * Do a SCSI reset to clean up the bus during initialization. No
154 * messing with the queues, interrupts, or locks necessary here.
155 */
156
157 printk( "Sun3 SCSI: resetting the SCSI bus..." );
158
159 /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
160// sun3_disable_irq( IRQ_SUN3_SCSI );
161
162 /* get in phase */
163 NCR5380_write( TARGET_COMMAND_REG,
164 PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
165
166 /* assert RST */
167 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
168
169 /* The min. reset hold time is 25us, so 40us should be enough */
170 udelay( 50 );
171
172 /* reset RST and interrupt */
173 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
174 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
175
176 for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
177 barrier();
178
179 /* switch on SCSI IRQ again */
180// sun3_enable_irq( IRQ_SUN3_SCSI );
181
182 printk( " done\n" );
183}
184#endif
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186// safe bits for the CSR
187#define CSR_GOOD 0x060f
188
David Howells7d12e782006-10-05 14:55:46 +0100189static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
191 unsigned short csr = dregs->csr;
192 int handled = 0;
193
Finn Thain757f5ba2014-03-18 11:42:24 +1100194#ifdef SUN3_SCSI_VME
195 dregs->csr &= ~CSR_DMA_ENABLE;
196#endif
197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 if(csr & ~CSR_GOOD) {
199 if(csr & CSR_DMA_BUSERR) {
200 printk("scsi%d: bus error in dma\n", default_instance->host_no);
201 }
202
203 if(csr & CSR_DMA_CONFLICT) {
204 printk("scsi%d: dma conflict\n", default_instance->host_no);
205 }
206 handled = 1;
207 }
208
209 if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
David Howells7d12e782006-10-05 14:55:46 +0100210 NCR5380_intr(irq, dummy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 handled = 1;
212 }
213
214 return IRQ_RETVAL(handled);
215}
216
217/*
218 * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
219 * reentering NCR5380_print_status seems to have ugly side effects
220 */
221
222/* this doesn't seem to get used at all -- sam */
223#if 0
224void sun3_sun3_debug (void)
225{
226 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228 if (default_instance) {
229 local_irq_save(flags);
230 NCR5380_print_status(default_instance);
231 local_irq_restore(flags);
232 }
233}
234#endif
235
236
237/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
238static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
239{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 void *addr;
241
242 if(sun3_dma_orig_addr != NULL)
243 dvma_unmap(sun3_dma_orig_addr);
244
Finn Thain757f5ba2014-03-18 11:42:24 +1100245#ifdef SUN3_SCSI_VME
246 addr = (void *)dvma_map_vme((unsigned long) data, count);
247#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 addr = (void *)dvma_map((unsigned long) data, count);
Finn Thain757f5ba2014-03-18 11:42:24 +1100249#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 sun3_dma_orig_addr = addr;
252 sun3_dma_orig_count = count;
Finn Thain757f5ba2014-03-18 11:42:24 +1100253
254#ifndef SUN3_SCSI_VME
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 dregs->fifo_count = 0;
256 sun3_udc_write(UDC_RESET, UDC_CSR);
257
258 /* reset fifo */
259 dregs->csr &= ~CSR_FIFO;
260 dregs->csr |= CSR_FIFO;
Finn Thain757f5ba2014-03-18 11:42:24 +1100261#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 /* set direction */
264 if(write_flag)
265 dregs->csr |= CSR_SEND;
266 else
267 dregs->csr &= ~CSR_SEND;
268
Finn Thain757f5ba2014-03-18 11:42:24 +1100269#ifdef SUN3_SCSI_VME
270 dregs->csr |= CSR_PACK_ENABLE;
271
272 dregs->dma_addr_hi = ((unsigned long)addr >> 16);
273 dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
274
275 dregs->dma_count_hi = 0;
276 dregs->dma_count_lo = 0;
277 dregs->fifo_count_hi = 0;
278 dregs->fifo_count = 0;
279#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 /* byte count for fifo */
281 dregs->fifo_count = count;
282
283 sun3_udc_write(UDC_RESET, UDC_CSR);
284
285 /* reset fifo */
286 dregs->csr &= ~CSR_FIFO;
287 dregs->csr |= CSR_FIFO;
288
289 if(dregs->fifo_count != count) {
290 printk("scsi%d: fifo_mismatch %04x not %04x\n",
291 default_instance->host_no, dregs->fifo_count,
292 (unsigned int) count);
Finn Thaind614f062014-03-18 11:42:16 +1100293 NCR5380_dprint(NDEBUG_DMA, default_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 }
295
296 /* setup udc */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8);
298 udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 udc_regs->count = count/2; /* count in words */
300 udc_regs->mode_hi = UDC_MODE_HIWORD;
301 if(write_flag) {
302 if(count & 1)
303 udc_regs->count++;
304 udc_regs->mode_lo = UDC_MODE_LSEND;
305 udc_regs->rsel = UDC_RSEL_SEND;
306 } else {
307 udc_regs->mode_lo = UDC_MODE_LRECV;
308 udc_regs->rsel = UDC_RSEL_RECV;
309 }
310
311 /* announce location of regs block */
312 sun3_udc_write(((dvma_vtob(udc_regs) & 0xff0000) >> 8),
313 UDC_CHN_HI);
314
315 sun3_udc_write((dvma_vtob(udc_regs) & 0xffff), UDC_CHN_LO);
316
317 /* set dma master on */
318 sun3_udc_write(0xd, UDC_MODE);
319
320 /* interrupt enable */
321 sun3_udc_write(UDC_INT_ENABLE, UDC_CSR);
Finn Thain757f5ba2014-03-18 11:42:24 +1100322#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324 return count;
325
326}
327
Finn Thain757f5ba2014-03-18 11:42:24 +1100328#ifndef SUN3_SCSI_VME
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)
330{
331 unsigned short resid;
332
333 dregs->udc_addr = 0x32;
334 udelay(SUN3_DMA_DELAY);
335 resid = dregs->udc_data;
336 udelay(SUN3_DMA_DELAY);
337 resid *= 2;
338
339 return (unsigned long) resid;
340}
Finn Thain757f5ba2014-03-18 11:42:24 +1100341#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
344{
345 return last_residual;
346}
347
Henne811c9362006-10-03 19:51:59 +0200348static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
349 struct scsi_cmnd *cmd,
350 int write_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
Christoph Hellwig33659eb2010-08-07 18:17:56 +0200352 if (cmd->request->cmd_type == REQ_TYPE_FS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 return wanted;
354 else
355 return 0;
356}
357
358static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)
359{
Finn Thain757f5ba2014-03-18 11:42:24 +1100360#ifdef SUN3_SCSI_VME
361 unsigned short csr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Finn Thain757f5ba2014-03-18 11:42:24 +1100363 csr = dregs->csr;
364
365 dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
366 dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
367
368 dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
369 dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
370
371/* if(!(csr & CSR_DMA_ENABLE))
372 * dregs->csr |= CSR_DMA_ENABLE;
373 */
374#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 sun3_udc_write(UDC_CHN_START, UDC_CSR);
Finn Thain757f5ba2014-03-18 11:42:24 +1100376#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 return 0;
379}
380
381/* clean up after our dma is done */
382static int sun3scsi_dma_finish(int write_flag)
383{
Finn Thain757f5ba2014-03-18 11:42:24 +1100384 unsigned short __maybe_unused count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 unsigned short fifo;
386 int ret = 0;
387
388 sun3_dma_active = 0;
Finn Thain757f5ba2014-03-18 11:42:24 +1100389
390#ifdef SUN3_SCSI_VME
391 dregs->csr &= ~CSR_DMA_ENABLE;
392
393 fifo = dregs->fifo_count;
394 if (write_flag) {
395 if ((fifo > 0) && (fifo < sun3_dma_orig_count))
396 fifo++;
397 }
398
399 last_residual = fifo;
400 /* empty bytes from the fifo which didn't make it */
401 if ((!write_flag) && (dregs->csr & CSR_LEFT)) {
402 unsigned char *vaddr;
403
404 vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
405
406 vaddr += (sun3_dma_orig_count - fifo);
407 vaddr--;
408
409 switch (dregs->csr & CSR_LEFT) {
410 case CSR_LEFT_3:
411 *vaddr = (dregs->bpack_lo & 0xff00) >> 8;
412 vaddr--;
413
414 case CSR_LEFT_2:
415 *vaddr = (dregs->bpack_hi & 0x00ff);
416 vaddr--;
417
418 case CSR_LEFT_1:
419 *vaddr = (dregs->bpack_hi & 0xff00) >> 8;
420 break;
421 }
422 }
423#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 // check to empty the fifo on a read
425 if(!write_flag) {
426 int tmo = 20000; /* .2 sec */
427
428 while(1) {
429 if(dregs->csr & CSR_FIFO_EMPTY)
430 break;
431
432 if(--tmo <= 0) {
433 printk("sun3scsi: fifo failed to empty!\n");
434 return 1;
435 }
436 udelay(10);
437 }
438 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440 count = sun3scsi_dma_count(default_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 fifo = dregs->fifo_count;
443 last_residual = fifo;
444
445 /* empty bytes from the fifo which didn't make it */
446 if((!write_flag) && (count - fifo) == 2) {
447 unsigned short data;
448 unsigned char *vaddr;
449
450 data = dregs->fifo_data;
451 vaddr = (unsigned char *)dvma_btov(sun3_dma_orig_addr);
452
453 vaddr += (sun3_dma_orig_count - fifo);
454
455 vaddr[-2] = (data & 0xff00) >> 8;
456 vaddr[-1] = (data & 0xff);
457 }
Finn Thain757f5ba2014-03-18 11:42:24 +1100458#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460 dvma_unmap(sun3_dma_orig_addr);
461 sun3_dma_orig_addr = NULL;
Finn Thain757f5ba2014-03-18 11:42:24 +1100462
463#ifdef SUN3_SCSI_VME
464 dregs->dma_addr_hi = 0;
465 dregs->dma_addr_lo = 0;
466 dregs->dma_count_hi = 0;
467 dregs->dma_count_lo = 0;
468
469 dregs->fifo_count = 0;
470 dregs->fifo_count_hi = 0;
471
472 dregs->csr &= ~CSR_SEND;
473/* dregs->csr |= CSR_DMA_ENABLE; */
474#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 sun3_udc_write(UDC_RESET, UDC_CSR);
476 dregs->fifo_count = 0;
477 dregs->csr &= ~CSR_SEND;
478
479 /* reset fifo */
480 dregs->csr &= ~CSR_FIFO;
481 dregs->csr |= CSR_FIFO;
Finn Thain757f5ba2014-03-18 11:42:24 +1100482#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484 sun3_dma_setup_done = NULL;
485
486 return ret;
487
488}
489
Finn Thain8dad0c52014-11-12 16:12:17 +1100490#include "atari_NCR5380.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Finn Thain0d31f872014-11-13 12:21:28 +1100492#ifdef SUN3_SCSI_VME
493#define SUN3_SCSI_NAME "Sun3 NCR5380 VME SCSI"
494#define DRV_MODULE_NAME "sun3_scsi_vme"
495#else
496#define SUN3_SCSI_NAME "Sun3 NCR5380 SCSI"
497#define DRV_MODULE_NAME "sun3_scsi"
498#endif
499
500#define PFX DRV_MODULE_NAME ": "
501
502static struct scsi_host_template sun3_scsi_template = {
503 .module = THIS_MODULE,
504 .proc_name = DRV_MODULE_NAME,
Geert Uytterhoeven9dcc26c2013-04-10 13:52:09 +0200505 .show_info = sun3scsi_show_info,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 .name = SUN3_SCSI_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 .info = sun3scsi_info,
508 .queuecommand = sun3scsi_queue_command,
509 .eh_abort_handler = sun3scsi_abort,
510 .eh_bus_reset_handler = sun3scsi_bus_reset,
Finn Thaind572f652014-11-12 16:12:00 +1100511 .can_queue = 16,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 .this_id = 7,
Finn Thaind572f652014-11-12 16:12:00 +1100513 .sg_tablesize = SG_NONE,
514 .cmd_per_lun = 2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 .use_clustering = DISABLE_CLUSTERING
516};
517
Finn Thain0d31f872014-11-13 12:21:28 +1100518static int __init sun3_scsi_probe(struct platform_device *pdev)
519{
520 struct Scsi_Host *instance;
521 int error;
522 struct resource *irq, *mem;
523 unsigned char *ioaddr;
Finn Thainca513fc2014-11-12 16:12:19 +1100524 int host_flags = 0;
Finn Thain0d31f872014-11-13 12:21:28 +1100525#ifdef SUN3_SCSI_VME
526 int i;
527#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Finn Thain0d31f872014-11-13 12:21:28 +1100529 if (setup_can_queue > 0)
530 sun3_scsi_template.can_queue = setup_can_queue;
531 if (setup_cmd_per_lun > 0)
532 sun3_scsi_template.cmd_per_lun = setup_cmd_per_lun;
533 if (setup_sg_tablesize >= 0)
534 sun3_scsi_template.sg_tablesize = setup_sg_tablesize;
535 if (setup_hostid >= 0)
536 sun3_scsi_template.this_id = setup_hostid & 7;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
Finn Thain0d31f872014-11-13 12:21:28 +1100538#ifdef SUN3_SCSI_VME
539 ioaddr = NULL;
540 for (i = 0; i < 2; i++) {
541 unsigned char x;
542
543 irq = platform_get_resource(pdev, IORESOURCE_IRQ, i);
544 mem = platform_get_resource(pdev, IORESOURCE_MEM, i);
545 if (!irq || !mem)
546 break;
547
548 ioaddr = sun3_ioremap(mem->start, resource_size(mem),
549 SUN3_PAGE_TYPE_VME16);
550 dregs = (struct sun3_dma_regs *)(ioaddr + 8);
551
552 if (sun3_map_test((unsigned long)dregs, &x)) {
553 unsigned short oldcsr;
554
555 oldcsr = dregs->csr;
556 dregs->csr = 0;
557 udelay(SUN3_DMA_DELAY);
558 if (dregs->csr == 0x1400)
559 break;
560
561 dregs->csr = oldcsr;
562 }
563
564 iounmap(ioaddr);
565 ioaddr = NULL;
566 }
567 if (!ioaddr)
568 return -ENODEV;
569#else
570 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
571 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
572 if (!irq || !mem)
573 return -ENODEV;
574
575 ioaddr = ioremap(mem->start, resource_size(mem));
576 dregs = (struct sun3_dma_regs *)(ioaddr + 8);
577
578 udc_regs = dvma_malloc(sizeof(struct sun3_udc_regs));
579 if (!udc_regs) {
580 pr_err(PFX "couldn't allocate DVMA memory!\n");
581 iounmap(ioaddr);
582 return -ENOMEM;
583 }
584#endif
585
586 sun3_scsi_regp = ioaddr;
587
588 instance = scsi_host_alloc(&sun3_scsi_template,
589 sizeof(struct NCR5380_hostdata));
590 if (!instance) {
591 error = -ENOMEM;
592 goto fail_alloc;
593 }
594 default_instance = instance;
595
596 instance->io_port = (unsigned long)ioaddr;
597 instance->irq = irq->start;
598
Finn Thainca513fc2014-11-12 16:12:19 +1100599#ifdef SUPPORT_TAGS
600 host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
601#endif
602
603 NCR5380_init(instance, host_flags);
Finn Thain0d31f872014-11-13 12:21:28 +1100604
605 error = request_irq(instance->irq, scsi_sun3_intr, 0,
606 "NCR5380", instance);
607 if (error) {
608#ifdef REAL_DMA
609 pr_err(PFX "scsi%d: IRQ %d not free, bailing out\n",
610 instance->host_no, instance->irq);
611 goto fail_irq;
612#else
613 pr_warn(PFX "scsi%d: IRQ %d not free, interrupts disabled\n",
614 instance->host_no, instance->irq);
615 instance->irq = NO_IRQ;
616#endif
617 }
618
619 dregs->csr = 0;
620 udelay(SUN3_DMA_DELAY);
621 dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
622 udelay(SUN3_DMA_DELAY);
623 dregs->fifo_count = 0;
624#ifdef SUN3_SCSI_VME
625 dregs->fifo_count_hi = 0;
626 dregs->dma_addr_hi = 0;
627 dregs->dma_addr_lo = 0;
628 dregs->dma_count_hi = 0;
629 dregs->dma_count_lo = 0;
630
631 dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
632#endif
633
634#ifdef RESET_BOOT
635 sun3_scsi_reset_boot(instance);
636#endif
637
638 error = scsi_add_host(instance, NULL);
639 if (error)
640 goto fail_host;
641
642 platform_set_drvdata(pdev, instance);
643
644 scsi_scan_host(instance);
645 return 0;
646
647fail_host:
648 if (instance->irq != NO_IRQ)
649 free_irq(instance->irq, instance);
650fail_irq:
651 NCR5380_exit(instance);
652 scsi_host_put(instance);
653fail_alloc:
654 if (udc_regs)
655 dvma_free(udc_regs);
656 iounmap(sun3_scsi_regp);
657 return error;
658}
659
660static int __exit sun3_scsi_remove(struct platform_device *pdev)
661{
662 struct Scsi_Host *instance = platform_get_drvdata(pdev);
663
664 scsi_remove_host(instance);
665 if (instance->irq != NO_IRQ)
666 free_irq(instance->irq, instance);
667 NCR5380_exit(instance);
668 scsi_host_put(instance);
669 if (udc_regs)
670 dvma_free(udc_regs);
671 iounmap(sun3_scsi_regp);
672 return 0;
673}
674
675static struct platform_driver sun3_scsi_driver = {
676 .remove = __exit_p(sun3_scsi_remove),
677 .driver = {
678 .name = DRV_MODULE_NAME,
679 .owner = THIS_MODULE,
680 },
681};
682
683module_platform_driver_probe(sun3_scsi_driver, sun3_scsi_probe);
684
685MODULE_ALIAS("platform:" DRV_MODULE_NAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686MODULE_LICENSE("GPL");