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-rw-r--r--drivers/scsi/Kconfig15
-rw-r--r--drivers/scsi/Makefile2
-rw-r--r--drivers/scsi/seagate.c1667
3 files changed, 0 insertions, 1684 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index ad44557fe204..becbb09d4c9b 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1348,21 +1348,6 @@ config SCSI_LPFC
1348 This lpfc driver supports the Emulex LightPulse 1348 This lpfc driver supports the Emulex LightPulse
1349 Family of Fibre Channel PCI host adapters. 1349 Family of Fibre Channel PCI host adapters.
1350 1350
1351config SCSI_SEAGATE
1352 tristate "Seagate ST-02 and Future Domain TMC-8xx SCSI support"
1353 depends on X86 && ISA && SCSI
1354 select CHECK_SIGNATURE
1355 ---help---
1356 These are 8-bit SCSI controllers; the ST-01 is also supported by
1357 this driver. It is explained in section 3.9 of the SCSI-HOWTO,
1358 available from <http://www.tldp.org/docs.html#howto>. If it
1359 doesn't work out of the box, you may have to change some macros at
1360 compiletime, which are described in <file:drivers/scsi/seagate.c>.
1361
1362 To compile this driver as a module, choose M here: the
1363 module will be called seagate.
1364
1365# definitely looks not 64bit safe:
1366config SCSI_SIM710 1351config SCSI_SIM710
1367 tristate "Simple 53c710 SCSI support (Compaq, NCR machines)" 1352 tristate "Simple 53c710 SCSI support (Compaq, NCR machines)"
1368 depends on (EISA || MCA) && SCSI 1353 depends on (EISA || MCA) && SCSI
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 2cd739c0ac33..b5441f5a48fc 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -16,7 +16,6 @@
16 16
17CFLAGS_aha152x.o = -DAHA152X_STAT -DAUTOCONF 17CFLAGS_aha152x.o = -DAHA152X_STAT -DAUTOCONF
18CFLAGS_gdth.o = # -DDEBUG_GDTH=2 -D__SERIAL__ -D__COM2__ -DGDTH_STATISTICS 18CFLAGS_gdth.o = # -DDEBUG_GDTH=2 -D__SERIAL__ -D__COM2__ -DGDTH_STATISTICS
19CFLAGS_seagate.o = -DARBITRATE -DPARITY -DSEAGATE_USE_ASM
20 19
21subdir-$(CONFIG_PCMCIA) += pcmcia 20subdir-$(CONFIG_PCMCIA) += pcmcia
22 21
@@ -89,7 +88,6 @@ obj-$(CONFIG_SCSI_QLA_FC) += qla2xxx/
89obj-$(CONFIG_SCSI_QLA_ISCSI) += qla4xxx/ 88obj-$(CONFIG_SCSI_QLA_ISCSI) += qla4xxx/
90obj-$(CONFIG_SCSI_LPFC) += lpfc/ 89obj-$(CONFIG_SCSI_LPFC) += lpfc/
91obj-$(CONFIG_SCSI_PAS16) += pas16.o 90obj-$(CONFIG_SCSI_PAS16) += pas16.o
92obj-$(CONFIG_SCSI_SEAGATE) += seagate.o
93obj-$(CONFIG_SCSI_T128) += t128.o 91obj-$(CONFIG_SCSI_T128) += t128.o
94obj-$(CONFIG_SCSI_DMX3191D) += dmx3191d.o 92obj-$(CONFIG_SCSI_DMX3191D) += dmx3191d.o
95obj-$(CONFIG_SCSI_DTC3280) += dtc.o 93obj-$(CONFIG_SCSI_DTC3280) += dtc.o
diff --git a/drivers/scsi/seagate.c b/drivers/scsi/seagate.c
deleted file mode 100644
index b11324479b5b..000000000000
--- a/drivers/scsi/seagate.c
+++ /dev/null
@@ -1,1667 +0,0 @@
1/*
2 * seagate.c Copyright (C) 1992, 1993 Drew Eckhardt
3 * low level scsi driver for ST01/ST02, Future Domain TMC-885,
4 * TMC-950 by Drew Eckhardt <drew@colorado.edu>
5 *
6 * Note : TMC-880 boards don't work because they have two bits in
7 * the status register flipped, I'll fix this "RSN"
8 * [why do I have strong feeling that above message is from 1993? :-)
9 * pavel@ucw.cz]
10 *
11 * This card does all the I/O via memory mapped I/O, so there is no need
12 * to check or allocate a region of the I/O address space.
13 */
14
15/* 1996 - to use new read{b,w,l}, write{b,w,l}, and phys_to_virt
16 * macros, replaced assembler routines with C. There's probably a
17 * performance hit, but I only have a cdrom and can't tell. Define
18 * SEAGATE_USE_ASM if you want the old assembler code -- SJT
19 *
20 * 1998-jul-29 - created DPRINTK macros and made it work under
21 * linux 2.1.112, simplified some #defines etc. <pavel@ucw.cz>
22 *
23 * Aug 2000 - aeb - deleted seagate_st0x_biosparam(). It would try to
24 * read the physical disk geometry, a bad mistake. Of course it doesn't
25 * matter much what geometry one invents, but on large disks it
26 * returned 256 (or more) heads, causing all kind of failures.
27 * Of course this means that people might see a different geometry now,
28 * so boot parameters may be necessary in some cases.
29 */
30
31/*
32 * Configuration :
33 * To use without BIOS -DOVERRIDE=base_address -DCONTROLLER=FD or SEAGATE
34 * -DIRQ will override the default of 5.
35 * Note: You can now set these options from the kernel's "command line".
36 * The syntax is:
37 *
38 * st0x=ADDRESS,IRQ (for a Seagate controller)
39 * or:
40 * tmc8xx=ADDRESS,IRQ (for a TMC-8xx or TMC-950 controller)
41 * eg:
42 * tmc8xx=0xC8000,15
43 *
44 * will configure the driver for a TMC-8xx style controller using IRQ 15
45 * with a base address of 0xC8000.
46 *
47 * -DARBITRATE
48 * Will cause the host adapter to arbitrate for the
49 * bus for better SCSI-II compatibility, rather than just
50 * waiting for BUS FREE and then doing its thing. Should
51 * let us do one command per Lun when I integrate my
52 * reorganization changes into the distribution sources.
53 *
54 * -DDEBUG=65535
55 * Will activate debug code.
56 *
57 * -DFAST or -DFAST32
58 * Will use blind transfers where possible
59 *
60 * -DPARITY
61 * This will enable parity.
62 *
63 * -DSEAGATE_USE_ASM
64 * Will use older seagate assembly code. should be (very small amount)
65 * Faster.
66 *
67 * -DSLOW_RATE=50
68 * Will allow compatibility with broken devices that don't
69 * handshake fast enough (ie, some CD ROM's) for the Seagate
70 * code.
71 *
72 * 50 is some number, It will let you specify a default
73 * transfer rate if handshaking isn't working correctly.
74 *
75 * -DOLDCNTDATASCEME There is a new sceme to set the CONTROL
76 * and DATA reigsters which complies more closely
77 * with the SCSI2 standard. This hopefully eliminates
78 * the need to swap the order these registers are
79 * 'messed' with. It makes the following two options
80 * obsolete. To reenable the old sceme define this.
81 *
82 * The following to options are patches from the SCSI.HOWTO
83 *
84 * -DSWAPSTAT This will swap the definitions for STAT_MSG and STAT_CD.
85 *
86 * -DSWAPCNTDATA This will swap the order that seagate.c messes with
87 * the CONTROL an DATA registers.
88 */
89
90#include <linux/module.h>
91#include <linux/interrupt.h>
92#include <linux/spinlock.h>
93#include <linux/signal.h>
94#include <linux/string.h>
95#include <linux/proc_fs.h>
96#include <linux/init.h>
97#include <linux/blkdev.h>
98#include <linux/stat.h>
99#include <linux/delay.h>
100#include <linux/io.h>
101
102#include <asm/system.h>
103#include <asm/uaccess.h>
104
105#include <scsi/scsi_cmnd.h>
106#include <scsi/scsi_device.h>
107#include <scsi/scsi.h>
108
109#include <scsi/scsi_dbg.h>
110#include <scsi/scsi_host.h>
111
112
113#ifdef DEBUG
114#define DPRINTK( when, msg... ) do { if ( (DEBUG & (when)) == (when) ) printk( msg ); } while (0)
115#else
116#define DPRINTK( when, msg... ) do { } while (0)
117#define DEBUG 0
118#endif
119#define DANY( msg... ) DPRINTK( 0xffff, msg );
120
121#ifndef IRQ
122#define IRQ 5
123#endif
124
125#ifdef FAST32
126#define FAST
127#endif
128
129#undef LINKED /* Linked commands are currently broken! */
130
131#if defined(OVERRIDE) && !defined(CONTROLLER)
132#error Please use -DCONTROLLER=SEAGATE or -DCONTROLLER=FD to override controller type
133#endif
134
135#ifndef __i386__
136#undef SEAGATE_USE_ASM
137#endif
138
139/*
140 Thanks to Brian Antoine for the example code in his Messy-Loss ST-01
141 driver, and Mitsugu Suzuki for information on the ST-01
142 SCSI host.
143*/
144
145/*
146 CONTROL defines
147*/
148
149#define CMD_RST 0x01
150#define CMD_SEL 0x02
151#define CMD_BSY 0x04
152#define CMD_ATTN 0x08
153#define CMD_START_ARB 0x10
154#define CMD_EN_PARITY 0x20
155#define CMD_INTR 0x40
156#define CMD_DRVR_ENABLE 0x80
157
158/*
159 STATUS
160*/
161#ifdef SWAPSTAT
162#define STAT_MSG 0x08
163#define STAT_CD 0x02
164#else
165#define STAT_MSG 0x02
166#define STAT_CD 0x08
167#endif
168
169#define STAT_BSY 0x01
170#define STAT_IO 0x04
171#define STAT_REQ 0x10
172#define STAT_SEL 0x20
173#define STAT_PARITY 0x40
174#define STAT_ARB_CMPL 0x80
175
176/*
177 REQUESTS
178*/
179
180#define REQ_MASK (STAT_CD | STAT_IO | STAT_MSG)
181#define REQ_DATAOUT 0
182#define REQ_DATAIN STAT_IO
183#define REQ_CMDOUT STAT_CD
184#define REQ_STATIN (STAT_CD | STAT_IO)
185#define REQ_MSGOUT (STAT_MSG | STAT_CD)
186#define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO)
187
188extern volatile int seagate_st0x_timeout;
189
190#ifdef PARITY
191#define BASE_CMD CMD_EN_PARITY
192#else
193#define BASE_CMD 0
194#endif
195
196/*
197 Debugging code
198*/
199
200#define PHASE_BUS_FREE 1
201#define PHASE_ARBITRATION 2
202#define PHASE_SELECTION 4
203#define PHASE_DATAIN 8
204#define PHASE_DATAOUT 0x10
205#define PHASE_CMDOUT 0x20
206#define PHASE_MSGIN 0x40
207#define PHASE_MSGOUT 0x80
208#define PHASE_STATUSIN 0x100
209#define PHASE_ETC (PHASE_DATAIN | PHASE_DATAOUT | PHASE_CMDOUT | PHASE_MSGIN | PHASE_MSGOUT | PHASE_STATUSIN)
210#define PRINT_COMMAND 0x200
211#define PHASE_EXIT 0x400
212#define PHASE_RESELECT 0x800
213#define DEBUG_FAST 0x1000
214#define DEBUG_SG 0x2000
215#define DEBUG_LINKED 0x4000
216#define DEBUG_BORKEN 0x8000
217
218/*
219 * Control options - these are timeouts specified in .01 seconds.
220 */
221
222/* 30, 20 work */
223#define ST0X_BUS_FREE_DELAY 25
224#define ST0X_SELECTION_DELAY 25
225
226#define SEAGATE 1 /* these determine the type of the controller */
227#define FD 2
228
229#define ST0X_ID_STR "Seagate ST-01/ST-02"
230#define FD_ID_STR "TMC-8XX/TMC-950"
231
232static int internal_command (unsigned char target, unsigned char lun,
233 const void *cmnd,
234 void *buff, int bufflen, int reselect);
235
236static int incommand; /* set if arbitration has finished
237 and we are in some command phase. */
238
239static unsigned int base_address = 0; /* Where the card ROM starts, used to
240 calculate memory mapped register
241 location. */
242
243static void __iomem *st0x_cr_sr; /* control register write, status
244 register read. 256 bytes in
245 length.
246 Read is status of SCSI BUS, as per
247 STAT masks. */
248
249static void __iomem *st0x_dr; /* data register, read write 256
250 bytes in length. */
251
252static volatile int st0x_aborted = 0; /* set when we are aborted, ie by a
253 time out, etc. */
254
255static unsigned char controller_type = 0; /* set to SEAGATE for ST0x
256 boards or FD for TMC-8xx
257 boards */
258static int irq = IRQ;
259
260module_param(base_address, uint, 0);
261module_param(controller_type, byte, 0);
262module_param(irq, int, 0);
263MODULE_LICENSE("GPL");
264
265
266#define retcode(result) (((result) << 16) | (message << 8) | status)
267#define STATUS ((u8) readb(st0x_cr_sr))
268#define DATA ((u8) readb(st0x_dr))
269#define WRITE_CONTROL(d) { writeb((d), st0x_cr_sr); }
270#define WRITE_DATA(d) { writeb((d), st0x_dr); }
271
272#ifndef OVERRIDE
273static unsigned int seagate_bases[] = {
274 0xc8000, 0xca000, 0xcc000,
275 0xce000, 0xdc000, 0xde000
276};
277
278typedef struct {
279 const unsigned char *signature;
280 unsigned offset;
281 unsigned length;
282 unsigned char type;
283} Signature;
284
285static Signature __initdata signatures[] = {
286 {"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE},
287 {"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE},
288
289/*
290 * The following two lines are NOT mistakes. One detects ROM revision
291 * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter,
292 * and this is not going to change, the "SEAGATE" and "SCSI" together
293 * are probably "good enough"
294 */
295
296 {"SEAGATE SCSI BIOS ", 16, 17, SEAGATE},
297 {"SEAGATE SCSI BIOS ", 17, 17, SEAGATE},
298
299/*
300 * However, future domain makes several incompatible SCSI boards, so specific
301 * signatures must be used.
302 */
303
304 {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 46, FD},
305 {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FD},
306 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90", 5, 47, FD},
307 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90", 5, 47, FD},
308 {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FD},
309 {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FD},
310 {"IBM F1 BIOS V1.1004/30/92", 5, 25, FD},
311 {"FUTURE DOMAIN TMC-950", 5, 21, FD},
312 /* Added for 2.2.16 by Matthias_Heidbrink@b.maus.de */
313 {"IBM F1 V1.2009/22/93", 5, 25, FD},
314};
315
316#define NUM_SIGNATURES ARRAY_SIZE(signatures)
317#endif /* n OVERRIDE */
318
319/*
320 * hostno stores the hostnumber, as told to us by the init routine.
321 */
322
323static int hostno = -1;
324static void seagate_reconnect_intr (int, void *);
325static irqreturn_t do_seagate_reconnect_intr (int, void *);
326static int seagate_st0x_bus_reset(struct scsi_cmnd *);
327
328#ifdef FAST
329static int fast = 1;
330#else
331#define fast 0
332#endif
333
334#ifdef SLOW_RATE
335/*
336 * Support for broken devices :
337 * The Seagate board has a handshaking problem. Namely, a lack
338 * thereof for slow devices. You can blast 600K/second through
339 * it if you are polling for each byte, more if you do a blind
340 * transfer. In the first case, with a fast device, REQ will
341 * transition high-low or high-low-high before your loop restarts
342 * and you'll have no problems. In the second case, the board
343 * will insert wait states for up to 13.2 usecs for REQ to
344 * transition low->high, and everything will work.
345 *
346 * However, there's nothing in the state machine that says
347 * you *HAVE* to see a high-low-high set of transitions before
348 * sending the next byte, and slow things like the Trantor CD ROMS
349 * will break because of this.
350 *
351 * So, we need to slow things down, which isn't as simple as it
352 * seems. We can't slow things down period, because then people
353 * who don't recompile their kernels will shoot me for ruining
354 * their performance. We need to do it on a case per case basis.
355 *
356 * The best for performance will be to, only for borken devices
357 * (this is stored on a per-target basis in the scsi_devices array)
358 *
359 * Wait for a low->high transition before continuing with that
360 * transfer. If we timeout, continue anyways. We don't need
361 * a long timeout, because REQ should only be asserted until the
362 * corresponding ACK is received and processed.
363 *
364 * Note that we can't use the system timer for this, because of
365 * resolution, and we *really* can't use the timer chip since
366 * gettimeofday() and the beeper routines use that. So,
367 * the best thing for us to do will be to calibrate a timing
368 * loop in the initialization code using the timer chip before
369 * gettimeofday() can screw with it.
370 *
371 * FIXME: this is broken (not borken :-). Empty loop costs less than
372 * loop with ISA access in it! -- pavel@ucw.cz
373 */
374
375static int borken_calibration = 0;
376
377static void __init borken_init (void)
378{
379 register int count = 0, start = jiffies + 1, stop = start + 25;
380
381 /* FIXME: There may be a better approach, this is a straight port for
382 now */
383 preempt_disable();
384 while (time_before (jiffies, start))
385 cpu_relax();
386 for (; time_before (jiffies, stop); ++count)
387 cpu_relax();
388 preempt_enable();
389
390/*
391 * Ok, we now have a count for .25 seconds. Convert to a
392 * count per second and divide by transfer rate in K. */
393
394 borken_calibration = (count * 4) / (SLOW_RATE * 1024);
395
396 if (borken_calibration < 1)
397 borken_calibration = 1;
398}
399
400static inline void borken_wait (void)
401{
402 register int count;
403
404 for (count = borken_calibration; count && (STATUS & STAT_REQ); --count)
405 cpu_relax();
406
407#if (DEBUG & DEBUG_BORKEN)
408 if (count)
409 printk ("scsi%d : borken timeout\n", hostno);
410#endif
411}
412
413#endif /* def SLOW_RATE */
414
415/* These beasts only live on ISA, and ISA means 8MHz. Each ULOOP()
416 * contains at least one ISA access, which takes more than 0.125
417 * usec. So if we loop 8 times time in usec, we are safe.
418 */
419
420#define ULOOP( i ) for (clock = i*8;;)
421#define TIMEOUT (!(clock--))
422
423static int __init seagate_st0x_detect (struct scsi_host_template * tpnt)
424{
425 struct Scsi_Host *instance;
426 int i, j;
427 unsigned long cr, dr;
428
429 tpnt->proc_name = "seagate";
430/*
431 * First, we try for the manual override.
432 */
433 DANY ("Autodetecting ST0x / TMC-8xx\n");
434
435 if (hostno != -1) {
436 printk (KERN_ERR "seagate_st0x_detect() called twice?!\n");
437 return 0;
438 }
439
440/* If the user specified the controller type from the command line,
441 controller_type will be non-zero, so don't try to detect one */
442
443 if (!controller_type) {
444#ifdef OVERRIDE
445 base_address = OVERRIDE;
446 controller_type = CONTROLLER;
447
448 DANY ("Base address overridden to %x, controller type is %s\n",
449 base_address,
450 controller_type == SEAGATE ? "SEAGATE" : "FD");
451#else /* OVERRIDE */
452/*
453 * To detect this card, we simply look for the signature
454 * from the BIOS version notice in all the possible locations
455 * of the ROM's. This has a nice side effect of not trashing
456 * any register locations that might be used by something else.
457 *
458 * XXX - note that we probably should be probing the address
459 * space for the on-board RAM instead.
460 */
461
462 for (i = 0; i < ARRAY_SIZE(seagate_bases); ++i) {
463 void __iomem *p = ioremap(seagate_bases[i], 0x2000);
464 if (!p)
465 continue;
466 for (j = 0; j < NUM_SIGNATURES; ++j)
467 if (check_signature(p + signatures[j].offset, signatures[j].signature, signatures[j].length)) {
468 base_address = seagate_bases[i];
469 controller_type = signatures[j].type;
470 break;
471 }
472 iounmap(p);
473 }
474#endif /* OVERRIDE */
475 }
476 /* (! controller_type) */
477 tpnt->this_id = (controller_type == SEAGATE) ? 7 : 6;
478 tpnt->name = (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR;
479
480 if (!base_address) {
481 printk(KERN_INFO "seagate: ST0x/TMC-8xx not detected.\n");
482 return 0;
483 }
484
485 cr = base_address + (controller_type == SEAGATE ? 0x1a00 : 0x1c00);
486 dr = cr + 0x200;
487 st0x_cr_sr = ioremap(cr, 0x100);
488 st0x_dr = ioremap(dr, 0x100);
489
490 DANY("%s detected. Base address = %x, cr = %x, dr = %x\n",
491 tpnt->name, base_address, cr, dr);
492
493 /*
494 * At all times, we will use IRQ 5. Should also check for IRQ3
495 * if we lose our first interrupt.
496 */
497 instance = scsi_register (tpnt, 0);
498 if (instance == NULL)
499 return 0;
500
501 hostno = instance->host_no;
502 if (request_irq (irq, do_seagate_reconnect_intr, IRQF_DISABLED, (controller_type == SEAGATE) ? "seagate" : "tmc-8xx", instance)) {
503 printk(KERN_ERR "scsi%d : unable to allocate IRQ%d\n", hostno, irq);
504 return 0;
505 }
506 instance->irq = irq;
507 instance->io_port = base_address;
508#ifdef SLOW_RATE
509 printk(KERN_INFO "Calibrating borken timer... ");
510 borken_init();
511 printk(" %d cycles per transfer\n", borken_calibration);
512#endif
513 printk (KERN_INFO "This is one second... ");
514 {
515 int clock;
516 ULOOP (1 * 1000 * 1000) {
517 STATUS;
518 if (TIMEOUT)
519 break;
520 }
521 }
522
523 printk ("done, %s options:"
524#ifdef ARBITRATE
525 " ARBITRATE"
526#endif
527#if DEBUG
528 " DEBUG"
529#endif
530#ifdef FAST
531 " FAST"
532#ifdef FAST32
533 "32"
534#endif
535#endif
536#ifdef LINKED
537 " LINKED"
538#endif
539#ifdef PARITY
540 " PARITY"
541#endif
542#ifdef SEAGATE_USE_ASM
543 " SEAGATE_USE_ASM"
544#endif
545#ifdef SLOW_RATE
546 " SLOW_RATE"
547#endif
548#ifdef SWAPSTAT
549 " SWAPSTAT"
550#endif
551#ifdef SWAPCNTDATA
552 " SWAPCNTDATA"
553#endif
554 "\n", tpnt->name);
555 return 1;
556}
557
558static const char *seagate_st0x_info (struct Scsi_Host *shpnt)
559{
560 static char buffer[64];
561
562 snprintf(buffer, 64, "%s at irq %d, address 0x%05X",
563 (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR,
564 irq, base_address);
565 return buffer;
566}
567
568/*
569 * These are our saved pointers for the outstanding command that is
570 * waiting for a reconnect
571 */
572
573static unsigned char current_target, current_lun;
574static unsigned char *current_cmnd, *current_data;
575static int current_nobuffs;
576static struct scatterlist *current_buffer;
577static int current_bufflen;
578
579#ifdef LINKED
580/*
581 * linked_connected indicates whether or not we are currently connected to
582 * linked_target, linked_lun and in an INFORMATION TRANSFER phase,
583 * using linked commands.
584 */
585
586static int linked_connected = 0;
587static unsigned char linked_target, linked_lun;
588#endif
589
590static void (*done_fn) (struct scsi_cmnd *) = NULL;
591static struct scsi_cmnd *SCint = NULL;
592
593/*
594 * These control whether or not disconnect / reconnect will be attempted,
595 * or are being attempted.
596 */
597
598#define NO_RECONNECT 0
599#define RECONNECT_NOW 1
600#define CAN_RECONNECT 2
601
602/*
603 * LINKED_RIGHT indicates that we are currently connected to the correct target
604 * for this command, LINKED_WRONG indicates that we are connected to the wrong
605 * target. Note that these imply CAN_RECONNECT and require defined(LINKED).
606 */
607
608#define LINKED_RIGHT 3
609#define LINKED_WRONG 4
610
611/*
612 * This determines if we are expecting to reconnect or not.
613 */
614
615static int should_reconnect = 0;
616
617/*
618 * The seagate_reconnect_intr routine is called when a target reselects the
619 * host adapter. This occurs on the interrupt triggered by the target
620 * asserting SEL.
621 */
622
623static irqreturn_t do_seagate_reconnect_intr(int irq, void *dev_id)
624{
625 unsigned long flags;
626 struct Scsi_Host *dev = dev_id;
627
628 spin_lock_irqsave (dev->host_lock, flags);
629 seagate_reconnect_intr (irq, dev_id);
630 spin_unlock_irqrestore (dev->host_lock, flags);
631 return IRQ_HANDLED;
632}
633
634static void seagate_reconnect_intr (int irq, void *dev_id)
635{
636 int temp;
637 struct scsi_cmnd *SCtmp;
638
639 DPRINTK (PHASE_RESELECT, "scsi%d : seagate_reconnect_intr() called\n", hostno);
640
641 if (!should_reconnect)
642 printk(KERN_WARNING "scsi%d: unexpected interrupt.\n", hostno);
643 else {
644 should_reconnect = 0;
645
646 DPRINTK (PHASE_RESELECT, "scsi%d : internal_command(%d, %08x, %08x, RECONNECT_NOW\n",
647 hostno, current_target, current_data, current_bufflen);
648
649 temp = internal_command (current_target, current_lun, current_cmnd, current_data, current_bufflen, RECONNECT_NOW);
650
651 if (msg_byte(temp) != DISCONNECT) {
652 if (done_fn) {
653 DPRINTK(PHASE_RESELECT, "scsi%d : done_fn(%d,%08x)", hostno, hostno, temp);
654 if (!SCint)
655 panic ("SCint == NULL in seagate");
656 SCtmp = SCint;
657 SCint = NULL;
658 SCtmp->result = temp;
659 done_fn(SCtmp);
660 } else
661 printk(KERN_ERR "done_fn() not defined.\n");
662 }
663 }
664}
665
666/*
667 * The seagate_st0x_queue_command() function provides a queued interface
668 * to the seagate SCSI driver. Basically, it just passes control onto the
669 * seagate_command() function, after fixing it so that the done_fn()
670 * is set to the one passed to the function. We have to be very careful,
671 * because there are some commands on some devices that do not disconnect,
672 * and if we simply call the done_fn when the command is done then another
673 * command is started and queue_command is called again... We end up
674 * overflowing the kernel stack, and this tends not to be such a good idea.
675 */
676
677static int recursion_depth = 0;
678
679static int seagate_st0x_queue_command(struct scsi_cmnd * SCpnt,
680 void (*done) (struct scsi_cmnd *))
681{
682 int result, reconnect;
683 struct scsi_cmnd *SCtmp;
684
685 DANY ("seagate: que_command");
686 done_fn = done;
687 current_target = SCpnt->device->id;
688 current_lun = SCpnt->device->lun;
689 current_cmnd = SCpnt->cmnd;
690 current_data = (unsigned char *) SCpnt->request_buffer;
691 current_bufflen = SCpnt->request_bufflen;
692 SCint = SCpnt;
693 if (recursion_depth)
694 return 1;
695 recursion_depth++;
696 do {
697#ifdef LINKED
698 /*
699 * Set linked command bit in control field of SCSI command.
700 */
701
702 current_cmnd[SCpnt->cmd_len] |= 0x01;
703 if (linked_connected) {
704 DPRINTK (DEBUG_LINKED, "scsi%d : using linked commands, current I_T_L nexus is ", hostno);
705 if (linked_target == current_target && linked_lun == current_lun)
706 {
707 DPRINTK(DEBUG_LINKED, "correct\n");
708 reconnect = LINKED_RIGHT;
709 } else {
710 DPRINTK(DEBUG_LINKED, "incorrect\n");
711 reconnect = LINKED_WRONG;
712 }
713 } else
714#endif /* LINKED */
715 reconnect = CAN_RECONNECT;
716
717 result = internal_command(SCint->device->id, SCint->device->lun, SCint->cmnd,
718 SCint->request_buffer, SCint->request_bufflen, reconnect);
719 if (msg_byte(result) == DISCONNECT)
720 break;
721 SCtmp = SCint;
722 SCint = NULL;
723 SCtmp->result = result;
724 done_fn(SCtmp);
725 }
726 while (SCint);
727 recursion_depth--;
728 return 0;
729}
730
731static int internal_command (unsigned char target, unsigned char lun,
732 const void *cmnd, void *buff, int bufflen, int reselect)
733{
734 unsigned char *data = NULL;
735 struct scatterlist *buffer = NULL;
736 int clock, temp, nobuffs = 0, done = 0, len = 0;
737#if DEBUG
738 int transfered = 0, phase = 0, newphase;
739#endif
740 register unsigned char status_read;
741 unsigned char tmp_data, tmp_control, status = 0, message = 0;
742 unsigned transfersize = 0, underflow = 0;
743#ifdef SLOW_RATE
744 int borken = (int) SCint->device->borken; /* Does the current target require
745 Very Slow I/O ? */
746#endif
747
748 incommand = 0;
749 st0x_aborted = 0;
750
751#if (DEBUG & PRINT_COMMAND)
752 printk("scsi%d : target = %d, command = ", hostno, target);
753 __scsi_print_command((unsigned char *) cmnd);
754#endif
755
756#if (DEBUG & PHASE_RESELECT)
757 switch (reselect) {
758 case RECONNECT_NOW:
759 printk("scsi%d : reconnecting\n", hostno);
760 break;
761#ifdef LINKED
762 case LINKED_RIGHT:
763 printk("scsi%d : connected, can reconnect\n", hostno);
764 break;
765 case LINKED_WRONG:
766 printk("scsi%d : connected to wrong target, can reconnect\n",
767 hostno);
768 break;
769#endif
770 case CAN_RECONNECT:
771 printk("scsi%d : allowed to reconnect\n", hostno);
772 break;
773 default:
774 printk("scsi%d : not allowed to reconnect\n", hostno);
775 }
776#endif
777
778 if (target == (controller_type == SEAGATE ? 7 : 6))
779 return DID_BAD_TARGET;
780
781 /*
782 * We work it differently depending on if this is is "the first time,"
783 * or a reconnect. If this is a reselect phase, then SEL will
784 * be asserted, and we must skip selection / arbitration phases.
785 */
786
787 switch (reselect) {
788 case RECONNECT_NOW:
789 DPRINTK (PHASE_RESELECT, "scsi%d : phase RESELECT \n", hostno);
790 /*
791 * At this point, we should find the logical or of our ID
792 * and the original target's ID on the BUS, with BSY, SEL,
793 * and I/O signals asserted.
794 *
795 * After ARBITRATION phase is completed, only SEL, BSY,
796 * and the target ID are asserted. A valid initiator ID
797 * is not on the bus until IO is asserted, so we must wait
798 * for that.
799 */
800 ULOOP (100 * 1000) {
801 temp = STATUS;
802 if ((temp & STAT_IO) && !(temp & STAT_BSY))
803 break;
804 if (TIMEOUT) {
805 DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for IO .\n", hostno);
806 return (DID_BAD_INTR << 16);
807 }
808 }
809
810 /*
811 * After I/O is asserted by the target, we can read our ID
812 * and its ID off of the BUS.
813 */
814
815 if (!((temp = DATA) & (controller_type == SEAGATE ? 0x80 : 0x40))) {
816 DPRINTK (PHASE_RESELECT, "scsi%d : detected reconnect request to different target.\n\tData bus = %d\n", hostno, temp);
817 return (DID_BAD_INTR << 16);
818 }
819
820 if (!(temp & (1 << current_target))) {
821 printk(KERN_WARNING "scsi%d : Unexpected reselect interrupt. Data bus = %d\n", hostno, temp);
822 return (DID_BAD_INTR << 16);
823 }
824
825 buffer = current_buffer;
826 cmnd = current_cmnd; /* WDE add */
827 data = current_data; /* WDE add */
828 len = current_bufflen; /* WDE add */
829 nobuffs = current_nobuffs;
830
831 /*
832 * We have determined that we have been selected. At this
833 * point, we must respond to the reselection by asserting
834 * BSY ourselves
835 */
836
837#if 1
838 WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY);
839#else
840 WRITE_CONTROL (BASE_CMD | CMD_BSY);
841#endif
842
843 /*
844 * The target will drop SEL, and raise BSY, at which time
845 * we must drop BSY.
846 */
847
848 ULOOP (100 * 1000) {
849 if (!(STATUS & STAT_SEL))
850 break;
851 if (TIMEOUT) {
852 WRITE_CONTROL (BASE_CMD | CMD_INTR);
853 DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for SEL.\n", hostno);
854 return (DID_BAD_INTR << 16);
855 }
856 }
857 WRITE_CONTROL (BASE_CMD);
858 /*
859 * At this point, we have connected with the target
860 * and can get on with our lives.
861 */
862 break;
863 case CAN_RECONNECT:
864#ifdef LINKED
865 /*
866 * This is a bletcherous hack, just as bad as the Unix #!
867 * interpreter stuff. If it turns out we are using the wrong
868 * I_T_L nexus, the easiest way to deal with it is to go into
869 * our INFORMATION TRANSFER PHASE code, send a ABORT
870 * message on MESSAGE OUT phase, and then loop back to here.
871 */
872connect_loop:
873#endif
874 DPRINTK (PHASE_BUS_FREE, "scsi%d : phase = BUS FREE \n", hostno);
875
876 /*
877 * BUS FREE PHASE
878 *
879 * On entry, we make sure that the BUS is in a BUS FREE
880 * phase, by insuring that both BSY and SEL are low for
881 * at least one bus settle delay. Several reads help
882 * eliminate wire glitch.
883 */
884
885#ifndef ARBITRATE
886#error FIXME: this is broken: we may not use jiffies here - we are under cli(). It will hardlock.
887 clock = jiffies + ST0X_BUS_FREE_DELAY;
888
889 while (((STATUS | STATUS | STATUS) & (STAT_BSY | STAT_SEL)) && (!st0x_aborted) && time_before (jiffies, clock))
890 cpu_relax();
891
892 if (time_after (jiffies, clock))
893 return retcode (DID_BUS_BUSY);
894 else if (st0x_aborted)
895 return retcode (st0x_aborted);
896#endif
897 DPRINTK (PHASE_SELECTION, "scsi%d : phase = SELECTION\n", hostno);
898
899 clock = jiffies + ST0X_SELECTION_DELAY;
900
901 /*
902 * Arbitration/selection procedure :
903 * 1. Disable drivers
904 * 2. Write HOST adapter address bit
905 * 3. Set start arbitration.
906 * 4. We get either ARBITRATION COMPLETE or SELECT at this
907 * point.
908 * 5. OR our ID and targets on bus.
909 * 6. Enable SCSI drivers and asserted SEL and ATTN
910 */
911
912#ifdef ARBITRATE
913 /* FIXME: verify host lock is always held here */
914 WRITE_CONTROL(0);
915 WRITE_DATA((controller_type == SEAGATE) ? 0x80 : 0x40);
916 WRITE_CONTROL(CMD_START_ARB);
917
918 ULOOP (ST0X_SELECTION_DELAY * 10000) {
919 status_read = STATUS;
920 if (status_read & STAT_ARB_CMPL)
921 break;
922 if (st0x_aborted) /* FIXME: What? We are going to do something even after abort? */
923 break;
924 if (TIMEOUT || (status_read & STAT_SEL)) {
925 printk(KERN_WARNING "scsi%d : arbitration lost or timeout.\n", hostno);
926 WRITE_CONTROL (BASE_CMD);
927 return retcode (DID_NO_CONNECT);
928 }
929 }
930 DPRINTK (PHASE_SELECTION, "scsi%d : arbitration complete\n", hostno);
931#endif
932
933 /*
934 * When the SCSI device decides that we're gawking at it,
935 * it will respond by asserting BUSY on the bus.
936 *
937 * Note : the Seagate ST-01/02 product manual says that we
938 * should twiddle the DATA register before the control
939 * register. However, this does not work reliably so we do
940 * it the other way around.
941 *
942 * Probably could be a problem with arbitration too, we
943 * really should try this with a SCSI protocol or logic
944 * analyzer to see what is going on.
945 */
946 tmp_data = (unsigned char) ((1 << target) | (controller_type == SEAGATE ? 0x80 : 0x40));
947 tmp_control = BASE_CMD | CMD_DRVR_ENABLE | CMD_SEL | (reselect ? CMD_ATTN : 0);
948
949 /* FIXME: verify host lock is always held here */
950#ifdef OLDCNTDATASCEME
951#ifdef SWAPCNTDATA
952 WRITE_CONTROL (tmp_control);
953 WRITE_DATA (tmp_data);
954#else
955 WRITE_DATA (tmp_data);
956 WRITE_CONTROL (tmp_control);
957#endif
958#else
959 tmp_control ^= CMD_BSY; /* This is guesswork. What used to be in driver */
960 WRITE_CONTROL (tmp_control); /* could never work: it sent data into control */
961 WRITE_DATA (tmp_data); /* register and control info into data. Hopefully */
962 tmp_control ^= CMD_BSY; /* fixed, but order of first two may be wrong. */
963 WRITE_CONTROL (tmp_control); /* -- pavel@ucw.cz */
964#endif
965
966 ULOOP (250 * 1000) {
967 if (st0x_aborted) {
968 /*
969 * If we have been aborted, and we have a
970 * command in progress, IE the target
971 * still has BSY asserted, then we will
972 * reset the bus, and notify the midlevel
973 * driver to expect sense.
974 */
975
976 WRITE_CONTROL (BASE_CMD);
977 if (STATUS & STAT_BSY) {
978 printk(KERN_WARNING "scsi%d : BST asserted after we've been aborted.\n", hostno);
979 seagate_st0x_bus_reset(NULL);
980 return retcode (DID_RESET);
981 }
982 return retcode (st0x_aborted);
983 }
984 if (STATUS & STAT_BSY)
985 break;
986 if (TIMEOUT) {
987 DPRINTK (PHASE_SELECTION, "scsi%d : NO CONNECT with target %d, stat = %x \n", hostno, target, STATUS);
988 return retcode (DID_NO_CONNECT);
989 }
990 }
991
992 /* Establish current pointers. Take into account scatter / gather */
993
994 if ((nobuffs = SCint->use_sg)) {
995#if (DEBUG & DEBUG_SG)
996 {
997 int i;
998 printk("scsi%d : scatter gather requested, using %d buffers.\n", hostno, nobuffs);
999 for (i = 0; i < nobuffs; ++i)
1000 printk("scsi%d : buffer %d address = %p length = %d\n",
1001 hostno, i,
1002 sg_virt(&buffer[i]),
1003 buffer[i].length);
1004 }
1005#endif
1006
1007 buffer = (struct scatterlist *) SCint->request_buffer;
1008 len = buffer->length;
1009 data = sg_virt(buffer);
1010 } else {
1011 DPRINTK (DEBUG_SG, "scsi%d : scatter gather not requested.\n", hostno);
1012 buffer = NULL;
1013 len = SCint->request_bufflen;
1014 data = (unsigned char *) SCint->request_buffer;
1015 }
1016
1017 DPRINTK (PHASE_DATAIN | PHASE_DATAOUT, "scsi%d : len = %d\n",
1018 hostno, len);
1019
1020 break;
1021#ifdef LINKED
1022 case LINKED_RIGHT:
1023 break;
1024 case LINKED_WRONG:
1025 break;
1026#endif
1027 } /* end of switch(reselect) */
1028
1029 /*
1030 * There are several conditions under which we wish to send a message :
1031 * 1. When we are allowing disconnect / reconnect, and need to
1032 * establish the I_T_L nexus via an IDENTIFY with the DiscPriv bit
1033 * set.
1034 *
1035 * 2. When we are doing linked commands, are have the wrong I_T_L
1036 * nexus established and want to send an ABORT message.
1037 */
1038
1039 /* GCC does not like an ifdef inside a macro, so do it the hard way. */
1040#ifdef LINKED
1041 WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT)|| (reselect == LINKED_WRONG))? CMD_ATTN : 0));
1042#else
1043 WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT))? CMD_ATTN : 0));
1044#endif
1045
1046 /*
1047 * INFORMATION TRANSFER PHASE
1048 *
1049 * The nasty looking read / write inline assembler loops we use for
1050 * DATAIN and DATAOUT phases are approximately 4-5 times as fast as
1051 * the 'C' versions - since we're moving 1024 bytes of data, this
1052 * really adds up.
1053 *
1054 * SJT: The nasty-looking assembler is gone, so it's slower.
1055 *
1056 */
1057
1058 DPRINTK (PHASE_ETC, "scsi%d : phase = INFORMATION TRANSFER\n", hostno);
1059
1060 incommand = 1;
1061 transfersize = SCint->transfersize;
1062 underflow = SCint->underflow;
1063
1064 /*
1065 * Now, we poll the device for status information,
1066 * and handle any requests it makes. Note that since we are unsure
1067 * of how much data will be flowing across the system, etc and
1068 * cannot make reasonable timeouts, that we will instead have the
1069 * midlevel driver handle any timeouts that occur in this phase.
1070 */
1071
1072 while (((status_read = STATUS) & STAT_BSY) && !st0x_aborted && !done) {
1073#ifdef PARITY
1074 if (status_read & STAT_PARITY) {
1075 printk(KERN_ERR "scsi%d : got parity error\n", hostno);
1076 st0x_aborted = DID_PARITY;
1077 }
1078#endif
1079 if (status_read & STAT_REQ) {
1080#if ((DEBUG & PHASE_ETC) == PHASE_ETC)
1081 if ((newphase = (status_read & REQ_MASK)) != phase) {
1082 phase = newphase;
1083 switch (phase) {
1084 case REQ_DATAOUT:
1085 printk ("scsi%d : phase = DATA OUT\n", hostno);
1086 break;
1087 case REQ_DATAIN:
1088 printk ("scsi%d : phase = DATA IN\n", hostno);
1089 break;
1090 case REQ_CMDOUT:
1091 printk
1092 ("scsi%d : phase = COMMAND OUT\n", hostno);
1093 break;
1094 case REQ_STATIN:
1095 printk ("scsi%d : phase = STATUS IN\n", hostno);
1096 break;
1097 case REQ_MSGOUT:
1098 printk
1099 ("scsi%d : phase = MESSAGE OUT\n", hostno);
1100 break;
1101 case REQ_MSGIN:
1102 printk ("scsi%d : phase = MESSAGE IN\n", hostno);
1103 break;
1104 default:
1105 printk ("scsi%d : phase = UNKNOWN\n", hostno);
1106 st0x_aborted = DID_ERROR;
1107 }
1108 }
1109#endif
1110 switch (status_read & REQ_MASK) {
1111 case REQ_DATAOUT:
1112 /*
1113 * If we are in fast mode, then we simply splat
1114 * the data out in word-sized chunks as fast as
1115 * we can.
1116 */
1117
1118 if (!len) {
1119#if 0
1120 printk("scsi%d: underflow to target %d lun %d \n", hostno, target, lun);
1121 st0x_aborted = DID_ERROR;
1122 fast = 0;
1123#endif
1124 break;
1125 }
1126
1127 if (fast && transfersize
1128 && !(len % transfersize)
1129 && (len >= transfersize)
1130#ifdef FAST32
1131 && !(transfersize % 4)
1132#endif
1133 ) {
1134 DPRINTK (DEBUG_FAST,
1135 "scsi%d : FAST transfer, underflow = %d, transfersize = %d\n"
1136 " len = %d, data = %08x\n",
1137 hostno, SCint->underflow,
1138 SCint->transfersize, len,
1139 data);
1140
1141 /* SJT: Start. Fast Write */
1142#ifdef SEAGATE_USE_ASM
1143 __asm__ ("cld\n\t"
1144#ifdef FAST32
1145 "shr $2, %%ecx\n\t"
1146 "1:\t"
1147 "lodsl\n\t"
1148 "movl %%eax, (%%edi)\n\t"
1149#else
1150 "1:\t"
1151 "lodsb\n\t"
1152 "movb %%al, (%%edi)\n\t"
1153#endif
1154 "loop 1b;"
1155 /* output */ :
1156 /* input */ :"D" (st0x_dr),
1157 "S"
1158 (data),
1159 "c" (SCint->transfersize)
1160/* clobbered */
1161 : "eax", "ecx",
1162 "esi");
1163#else /* SEAGATE_USE_ASM */
1164 memcpy_toio(st0x_dr, data, transfersize);
1165#endif /* SEAGATE_USE_ASM */
1166/* SJT: End */
1167 len -= transfersize;
1168 data += transfersize;
1169 DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data);
1170 } else {
1171 /*
1172 * We loop as long as we are in a
1173 * data out phase, there is data to
1174 * send, and BSY is still active.
1175 */
1176
1177/* SJT: Start. Slow Write. */
1178#ifdef SEAGATE_USE_ASM
1179
1180 int __dummy_1, __dummy_2;
1181
1182/*
1183 * We loop as long as we are in a data out phase, there is data to send,
1184 * and BSY is still active.
1185 */
1186/* Local variables : len = ecx , data = esi,
1187 st0x_cr_sr = ebx, st0x_dr = edi
1188*/
1189 __asm__ (
1190 /* Test for any data here at all. */
1191 "orl %%ecx, %%ecx\n\t"
1192 "jz 2f\n\t" "cld\n\t"
1193/* "movl st0x_cr_sr, %%ebx\n\t" */
1194/* "movl st0x_dr, %%edi\n\t" */
1195 "1:\t"
1196 "movb (%%ebx), %%al\n\t"
1197 /* Test for BSY */
1198 "test $1, %%al\n\t"
1199 "jz 2f\n\t"
1200 /* Test for data out phase - STATUS & REQ_MASK should be
1201 REQ_DATAOUT, which is 0. */
1202 "test $0xe, %%al\n\t"
1203 "jnz 2f\n\t"
1204 /* Test for REQ */
1205 "test $0x10, %%al\n\t"
1206 "jz 1b\n\t"
1207 "lodsb\n\t"
1208 "movb %%al, (%%edi)\n\t"
1209 "loop 1b\n\t" "2:\n"
1210 /* output */ :"=S" (data), "=c" (len),
1211 "=b"
1212 (__dummy_1),
1213 "=D" (__dummy_2)
1214/* input */
1215 : "0" (data), "1" (len),
1216 "2" (st0x_cr_sr),
1217 "3" (st0x_dr)
1218/* clobbered */
1219 : "eax");
1220#else /* SEAGATE_USE_ASM */
1221 while (len) {
1222 unsigned char stat;
1223
1224 stat = STATUS;
1225 if (!(stat & STAT_BSY)
1226 || ((stat & REQ_MASK) !=
1227 REQ_DATAOUT))
1228 break;
1229 if (stat & STAT_REQ) {
1230 WRITE_DATA (*data++);
1231 --len;
1232 }
1233 }
1234#endif /* SEAGATE_USE_ASM */
1235/* SJT: End. */
1236 }
1237
1238 if (!len && nobuffs) {
1239 --nobuffs;
1240 ++buffer;
1241 len = buffer->length;
1242 data = sg_virt(buffer);
1243 DPRINTK (DEBUG_SG,
1244 "scsi%d : next scatter-gather buffer len = %d address = %08x\n",
1245 hostno, len, data);
1246 }
1247 break;
1248
1249 case REQ_DATAIN:
1250#ifdef SLOW_RATE
1251 if (borken) {
1252#if (DEBUG & (PHASE_DATAIN))
1253 transfered += len;
1254#endif
1255 for (; len && (STATUS & (REQ_MASK | STAT_REQ)) == (REQ_DATAIN | STAT_REQ); --len) {
1256 *data++ = DATA;
1257 borken_wait();
1258 }
1259#if (DEBUG & (PHASE_DATAIN))
1260 transfered -= len;
1261#endif
1262 } else
1263#endif
1264
1265 if (fast && transfersize
1266 && !(len % transfersize)
1267 && (len >= transfersize)
1268#ifdef FAST32
1269 && !(transfersize % 4)
1270#endif
1271 ) {
1272 DPRINTK (DEBUG_FAST,
1273 "scsi%d : FAST transfer, underflow = %d, transfersize = %d\n"
1274 " len = %d, data = %08x\n",
1275 hostno, SCint->underflow,
1276 SCint->transfersize, len,
1277 data);
1278
1279/* SJT: Start. Fast Read */
1280#ifdef SEAGATE_USE_ASM
1281 __asm__ ("cld\n\t"
1282#ifdef FAST32
1283 "shr $2, %%ecx\n\t"
1284 "1:\t"
1285 "movl (%%esi), %%eax\n\t"
1286 "stosl\n\t"
1287#else
1288 "1:\t"
1289 "movb (%%esi), %%al\n\t"
1290 "stosb\n\t"
1291#endif
1292 "loop 1b\n\t"
1293 /* output */ :
1294 /* input */ :"S" (st0x_dr),
1295 "D"
1296 (data),
1297 "c" (SCint->transfersize)
1298/* clobbered */
1299 : "eax", "ecx",
1300 "edi");
1301#else /* SEAGATE_USE_ASM */
1302 memcpy_fromio(data, st0x_dr, len);
1303#endif /* SEAGATE_USE_ASM */
1304/* SJT: End */
1305 len -= transfersize;
1306 data += transfersize;
1307#if (DEBUG & PHASE_DATAIN)
1308 printk ("scsi%d: transfered += %d\n", hostno, transfersize);
1309 transfered += transfersize;
1310#endif
1311
1312 DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data);
1313 } else {
1314
1315#if (DEBUG & PHASE_DATAIN)
1316 printk ("scsi%d: transfered += %d\n", hostno, len);
1317 transfered += len; /* Assume we'll transfer it all, then
1318 subtract what we *didn't* transfer */
1319#endif
1320
1321/*
1322 * We loop as long as we are in a data in phase, there is room to read,
1323 * and BSY is still active
1324 */
1325
1326/* SJT: Start. */
1327#ifdef SEAGATE_USE_ASM
1328
1329 int __dummy_3, __dummy_4;
1330
1331/* Dummy clobbering variables for the new gcc-2.95 */
1332
1333/*
1334 * We loop as long as we are in a data in phase, there is room to read,
1335 * and BSY is still active
1336 */
1337 /* Local variables : ecx = len, edi = data
1338 esi = st0x_cr_sr, ebx = st0x_dr */
1339 __asm__ (
1340 /* Test for room to read */
1341 "orl %%ecx, %%ecx\n\t"
1342 "jz 2f\n\t" "cld\n\t"
1343/* "movl st0x_cr_sr, %%esi\n\t" */
1344/* "movl st0x_dr, %%ebx\n\t" */
1345 "1:\t"
1346 "movb (%%esi), %%al\n\t"
1347 /* Test for BSY */
1348 "test $1, %%al\n\t"
1349 "jz 2f\n\t"
1350 /* Test for data in phase - STATUS & REQ_MASK should be REQ_DATAIN,
1351 = STAT_IO, which is 4. */
1352 "movb $0xe, %%ah\n\t"
1353 "andb %%al, %%ah\n\t"
1354 "cmpb $0x04, %%ah\n\t"
1355 "jne 2f\n\t"
1356 /* Test for REQ */
1357 "test $0x10, %%al\n\t"
1358 "jz 1b\n\t"
1359 "movb (%%ebx), %%al\n\t"
1360 "stosb\n\t"
1361 "loop 1b\n\t" "2:\n"
1362 /* output */ :"=D" (data), "=c" (len),
1363 "=S"
1364 (__dummy_3),
1365 "=b" (__dummy_4)
1366/* input */
1367 : "0" (data), "1" (len),
1368 "2" (st0x_cr_sr),
1369 "3" (st0x_dr)
1370/* clobbered */
1371 : "eax");
1372#else /* SEAGATE_USE_ASM */
1373 while (len) {
1374 unsigned char stat;
1375
1376 stat = STATUS;
1377 if (!(stat & STAT_BSY)
1378 || ((stat & REQ_MASK) !=
1379 REQ_DATAIN))
1380 break;
1381 if (stat & STAT_REQ) {
1382 *data++ = DATA;
1383 --len;
1384 }
1385 }
1386#endif /* SEAGATE_USE_ASM */
1387/* SJT: End. */
1388#if (DEBUG & PHASE_DATAIN)
1389 printk ("scsi%d: transfered -= %d\n", hostno, len);
1390 transfered -= len; /* Since we assumed all of Len got *
1391 transfered, correct our mistake */
1392#endif
1393 }
1394
1395 if (!len && nobuffs) {
1396 --nobuffs;
1397 ++buffer;
1398 len = buffer->length;
1399 data = sg_virt(buffer);
1400 DPRINTK (DEBUG_SG, "scsi%d : next scatter-gather buffer len = %d address = %08x\n", hostno, len, data);
1401 }
1402 break;
1403
1404 case REQ_CMDOUT:
1405 while (((status_read = STATUS) & STAT_BSY) &&
1406 ((status_read & REQ_MASK) == REQ_CMDOUT))
1407 if (status_read & STAT_REQ) {
1408 WRITE_DATA (*(const unsigned char *) cmnd);
1409 cmnd = 1 + (const unsigned char *)cmnd;
1410#ifdef SLOW_RATE
1411 if (borken)
1412 borken_wait ();
1413#endif
1414 }
1415 break;
1416
1417 case REQ_STATIN:
1418 status = DATA;
1419 break;
1420
1421 case REQ_MSGOUT:
1422 /*
1423 * We can only have sent a MSG OUT if we
1424 * requested to do this by raising ATTN.
1425 * So, we must drop ATTN.
1426 */
1427 WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE);
1428 /*
1429 * If we are reconnecting, then we must
1430 * send an IDENTIFY message in response
1431 * to MSGOUT.
1432 */
1433 switch (reselect) {
1434 case CAN_RECONNECT:
1435 WRITE_DATA (IDENTIFY (1, lun));
1436 DPRINTK (PHASE_RESELECT | PHASE_MSGOUT, "scsi%d : sent IDENTIFY message.\n", hostno);
1437 break;
1438#ifdef LINKED
1439 case LINKED_WRONG:
1440 WRITE_DATA (ABORT);
1441 linked_connected = 0;
1442 reselect = CAN_RECONNECT;
1443 goto connect_loop;
1444 DPRINTK (PHASE_MSGOUT | DEBUG_LINKED, "scsi%d : sent ABORT message to cancel incorrect I_T_L nexus.\n", hostno);
1445#endif /* LINKED */
1446 DPRINTK (DEBUG_LINKED, "correct\n");
1447 default:
1448 WRITE_DATA (NOP);
1449 printk("scsi%d : target %d requested MSGOUT, sent NOP message.\n", hostno, target);
1450 }
1451 break;
1452
1453 case REQ_MSGIN:
1454 switch (message = DATA) {
1455 case DISCONNECT:
1456 DANY("seagate: deciding to disconnect\n");
1457 should_reconnect = 1;
1458 current_data = data; /* WDE add */
1459 current_buffer = buffer;
1460 current_bufflen = len; /* WDE add */
1461 current_nobuffs = nobuffs;
1462#ifdef LINKED
1463 linked_connected = 0;
1464#endif
1465 done = 1;
1466 DPRINTK ((PHASE_RESELECT | PHASE_MSGIN), "scsi%d : disconnected.\n", hostno);
1467 break;
1468
1469#ifdef LINKED
1470 case LINKED_CMD_COMPLETE:
1471 case LINKED_FLG_CMD_COMPLETE:
1472#endif
1473 case COMMAND_COMPLETE:
1474 /*
1475 * Note : we should check for underflow here.
1476 */
1477 DPRINTK(PHASE_MSGIN, "scsi%d : command complete.\n", hostno);
1478 done = 1;
1479 break;
1480 case ABORT:
1481 DPRINTK(PHASE_MSGIN, "scsi%d : abort message.\n", hostno);
1482 done = 1;
1483 break;
1484 case SAVE_POINTERS:
1485 current_buffer = buffer;
1486 current_bufflen = len; /* WDE add */
1487 current_data = data; /* WDE mod */
1488 current_nobuffs = nobuffs;
1489 DPRINTK (PHASE_MSGIN, "scsi%d : pointers saved.\n", hostno);
1490 break;
1491 case RESTORE_POINTERS:
1492 buffer = current_buffer;
1493 cmnd = current_cmnd;
1494 data = current_data; /* WDE mod */
1495 len = current_bufflen;
1496 nobuffs = current_nobuffs;
1497 DPRINTK(PHASE_MSGIN, "scsi%d : pointers restored.\n", hostno);
1498 break;
1499 default:
1500
1501 /*
1502 * IDENTIFY distinguishes itself
1503 * from the other messages by
1504 * setting the high bit.
1505 *
1506 * Note : we need to handle at
1507 * least one outstanding command
1508 * per LUN, and need to hash the
1509 * SCSI command for that I_T_L
1510 * nexus based on the known ID
1511 * (at this point) and LUN.
1512 */
1513
1514 if (message & 0x80) {
1515 DPRINTK (PHASE_MSGIN, "scsi%d : IDENTIFY message received from id %d, lun %d.\n", hostno, target, message & 7);
1516 } else {
1517 /*
1518 * We should go into a
1519 * MESSAGE OUT phase, and
1520 * send a MESSAGE_REJECT
1521 * if we run into a message
1522 * that we don't like. The
1523 * seagate driver needs
1524 * some serious
1525 * restructuring first
1526 * though.
1527 */
1528 DPRINTK (PHASE_MSGIN, "scsi%d : unknown message %d from target %d.\n", hostno, message, target);
1529 }
1530 }
1531 break;
1532 default:
1533 printk(KERN_ERR "scsi%d : unknown phase.\n", hostno);
1534 st0x_aborted = DID_ERROR;
1535 } /* end of switch (status_read & REQ_MASK) */
1536#ifdef SLOW_RATE
1537 /*
1538 * I really don't care to deal with borken devices in
1539 * each single byte transfer case (ie, message in,
1540 * message out, status), so I'll do the wait here if
1541 * necessary.
1542 */
1543 if(borken)
1544 borken_wait();
1545#endif
1546
1547 } /* if(status_read & STAT_REQ) ends */
1548 } /* while(((status_read = STATUS)...) ends */
1549
1550 DPRINTK(PHASE_DATAIN | PHASE_DATAOUT | PHASE_EXIT, "scsi%d : Transfered %d bytes\n", hostno, transfered);
1551
1552#if (DEBUG & PHASE_EXIT)
1553#if 0 /* Doesn't work for scatter/gather */
1554 printk("Buffer : \n");
1555 for(i = 0; i < 20; ++i)
1556 printk("%02x ", ((unsigned char *) data)[i]); /* WDE mod */
1557 printk("\n");
1558#endif
1559 printk("scsi%d : status = ", hostno);
1560 scsi_print_status(status);
1561 printk(" message = %02x\n", message);
1562#endif
1563
1564 /* We shouldn't reach this until *after* BSY has been deasserted */
1565
1566#ifdef LINKED
1567 else
1568 {
1569 /*
1570 * Fix the message byte so that unsuspecting high level drivers
1571 * don't puke when they see a LINKED COMMAND message in place of
1572 * the COMMAND COMPLETE they may be expecting. Shouldn't be
1573 * necessary, but it's better to be on the safe side.
1574 *
1575 * A non LINKED* message byte will indicate that the command
1576 * completed, and we are now disconnected.
1577 */
1578
1579 switch (message) {
1580 case LINKED_CMD_COMPLETE:
1581 case LINKED_FLG_CMD_COMPLETE:
1582 message = COMMAND_COMPLETE;
1583 linked_target = current_target;
1584 linked_lun = current_lun;
1585 linked_connected = 1;
1586 DPRINTK (DEBUG_LINKED, "scsi%d : keeping I_T_L nexus established for linked command.\n", hostno);
1587 /* We also will need to adjust status to accommodate intermediate
1588 conditions. */
1589 if ((status == INTERMEDIATE_GOOD) || (status == INTERMEDIATE_C_GOOD))
1590 status = GOOD;
1591 break;
1592 /*
1593 * We should also handle what are "normal" termination
1594 * messages here (ABORT, BUS_DEVICE_RESET?, and
1595 * COMMAND_COMPLETE individually, and flake if things
1596 * aren't right.
1597 */
1598 default:
1599 DPRINTK (DEBUG_LINKED, "scsi%d : closing I_T_L nexus.\n", hostno);
1600 linked_connected = 0;
1601 }
1602 }
1603#endif /* LINKED */
1604
1605 if (should_reconnect) {
1606 DPRINTK (PHASE_RESELECT, "scsi%d : exiting seagate_st0x_queue_command() with reconnect enabled.\n", hostno);
1607 WRITE_CONTROL (BASE_CMD | CMD_INTR);
1608 } else
1609 WRITE_CONTROL (BASE_CMD);
1610
1611 return retcode (st0x_aborted);
1612} /* end of internal_command */
1613
1614static int seagate_st0x_abort(struct scsi_cmnd * SCpnt)
1615{
1616 st0x_aborted = DID_ABORT;
1617 return SUCCESS;
1618}
1619
1620#undef ULOOP
1621#undef TIMEOUT
1622
1623/*
1624 * the seagate_st0x_reset function resets the SCSI bus
1625 *
1626 * May be called with SCpnt = NULL
1627 */
1628
1629static int seagate_st0x_bus_reset(struct scsi_cmnd * SCpnt)
1630{
1631 /* No timeouts - this command is going to fail because it was reset. */
1632 DANY ("scsi%d: Reseting bus... ", hostno);
1633
1634 /* assert RESET signal on SCSI bus. */
1635 WRITE_CONTROL (BASE_CMD | CMD_RST);
1636
1637 mdelay (20);
1638
1639 WRITE_CONTROL (BASE_CMD);
1640 st0x_aborted = DID_RESET;
1641
1642 DANY ("done.\n");
1643 return SUCCESS;
1644}
1645
1646static int seagate_st0x_release(struct Scsi_Host *shost)
1647{
1648 if (shost->irq)
1649 free_irq(shost->irq, shost);
1650 release_region(shost->io_port, shost->n_io_port);
1651 return 0;
1652}
1653
1654static struct scsi_host_template driver_template = {
1655 .detect = seagate_st0x_detect,
1656 .release = seagate_st0x_release,
1657 .info = seagate_st0x_info,
1658 .queuecommand = seagate_st0x_queue_command,
1659 .eh_abort_handler = seagate_st0x_abort,
1660 .eh_bus_reset_handler = seagate_st0x_bus_reset,
1661 .can_queue = 1,
1662 .this_id = 7,
1663 .sg_tablesize = SG_ALL,
1664 .cmd_per_lun = 1,
1665 .use_clustering = DISABLE_CLUSTERING,
1666};
1667#include "scsi_module.c"
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-08 09:48:06 -0500