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1/* NCR53C9x.c: Defines and structures for the NCR53C9x generic driver.
2 *
3 * Originaly esp.h: Defines and structures for the Sparc ESP
4 * (Enhanced SCSI Processor) driver under Linux.
5 *
6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
7 *
8 * Generalization by Jesper Skov (jskov@cygnus.co.uk)
9 *
10 * More generalization (for i386 stuff) by Tymm Twillman (tymm@computer.org)
11 */
12
13#ifndef NCR53C9X_H
14#define NCR53C9X_H
15
16#include <linux/interrupt.h>
17
18/* djweis for mac driver */
19#if defined(CONFIG_MAC)
20#define PAD_SIZE 15
21#else
22#define PAD_SIZE 3
23#endif
24
25/* Handle multiple hostadapters on Amiga
26 * generally PAD_SIZE = 3
27 * but there is one exception: Oktagon (PAD_SIZE = 1) */
28#if defined(CONFIG_OKTAGON_SCSI) || defined(CONFIG_OKTAGON_SCSI_MODULE)
29#undef PAD_SIZE
30#if defined(CONFIG_BLZ1230_SCSI) || defined(CONFIG_BLZ1230_SCSI_MODULE) || \
31 defined(CONFIG_BLZ2060_SCSI) || defined(CONFIG_BLZ2060_SCSI_MODULE) || \
32 defined(CONFIG_CYBERSTORM_SCSI) || defined(CONFIG_CYBERSTORM_SCSI_MODULE) || \
33 defined(CONFIG_CYBERSTORMII_SCSI) || defined(CONFIG_CYBERSTORMII_SCSI_MODULE) || \
34 defined(CONFIG_FASTLANE_SCSI) || defined(CONFIG_FASTLANE_SCSI_MODULE)
35#define MULTIPLE_PAD_SIZES
36#else
37#define PAD_SIZE 1
38#endif
39#endif
40
41/* Macros for debugging messages */
42
43#define DEBUG_ESP
44/* #define DEBUG_ESP_DATA */
45/* #define DEBUG_ESP_QUEUE */
46/* #define DEBUG_ESP_DISCONNECT */
47/* #define DEBUG_ESP_STATUS */
48/* #define DEBUG_ESP_PHASES */
49/* #define DEBUG_ESP_WORKBUS */
50/* #define DEBUG_STATE_MACHINE */
51/* #define DEBUG_ESP_CMDS */
52/* #define DEBUG_ESP_IRQS */
53/* #define DEBUG_SDTR */
54/* #define DEBUG_ESP_SG */
55
56/* Use the following to sprinkle debugging messages in a way which
57 * suits you if combinations of the above become too verbose when
58 * trying to track down a specific problem.
59 */
60/* #define DEBUG_ESP_MISC */
61
62#if defined(DEBUG_ESP)
63#define ESPLOG(foo) printk foo
64#else
65#define ESPLOG(foo)
66#endif /* (DEBUG_ESP) */
67
68#if defined(DEBUG_ESP_DATA)
69#define ESPDATA(foo) printk foo
70#else
71#define ESPDATA(foo)
72#endif
73
74#if defined(DEBUG_ESP_QUEUE)
75#define ESPQUEUE(foo) printk foo
76#else
77#define ESPQUEUE(foo)
78#endif
79
80#if defined(DEBUG_ESP_DISCONNECT)
81#define ESPDISC(foo) printk foo
82#else
83#define ESPDISC(foo)
84#endif
85
86#if defined(DEBUG_ESP_STATUS)
87#define ESPSTAT(foo) printk foo
88#else
89#define ESPSTAT(foo)
90#endif
91
92#if defined(DEBUG_ESP_PHASES)
93#define ESPPHASE(foo) printk foo
94#else
95#define ESPPHASE(foo)
96#endif
97
98#if defined(DEBUG_ESP_WORKBUS)
99#define ESPBUS(foo) printk foo
100#else
101#define ESPBUS(foo)
102#endif
103
104#if defined(DEBUG_ESP_IRQS)
105#define ESPIRQ(foo) printk foo
106#else
107#define ESPIRQ(foo)
108#endif
109
110#if defined(DEBUG_SDTR)
111#define ESPSDTR(foo) printk foo
112#else
113#define ESPSDTR(foo)
114#endif
115
116#if defined(DEBUG_ESP_MISC)
117#define ESPMISC(foo) printk foo
118#else
119#define ESPMISC(foo)
120#endif
121
122/*
123 * padding for register structure
124 */
125#ifdef CONFIG_JAZZ_ESP
126#define EREGS_PAD(n)
127#else
128#ifndef MULTIPLE_PAD_SIZES
129#define EREGS_PAD(n) unchar n[PAD_SIZE];
130#endif
131#endif
132
133/* The ESP SCSI controllers have their register sets in three
134 * "classes":
135 *
136 * 1) Registers which are both read and write.
137 * 2) Registers which are read only.
138 * 3) Registers which are write only.
139 *
140 * Yet, they all live within the same IO space.
141 */
142
143#if !defined(__i386__) && !defined(__x86_64__)
144
145#ifndef MULTIPLE_PAD_SIZES
146
147#ifdef CONFIG_CPU_HAS_WB
148#include <asm/wbflush.h>
149#define esp_write(__reg, __val) do{(__reg) = (__val); wbflush();} while(0)
150#else
151#define esp_write(__reg, __val) ((__reg) = (__val))
152#endif
153#define esp_read(__reg) (__reg)
154
155struct ESP_regs {
156 /* Access Description Offset */
157 volatile unchar esp_tclow; /* rw Low bits of the transfer count 0x00 */
158 EREGS_PAD(tlpad1);
159 volatile unchar esp_tcmed; /* rw Mid bits of the transfer count 0x04 */
160 EREGS_PAD(fdpad);
161 volatile unchar esp_fdata; /* rw FIFO data bits 0x08 */
162 EREGS_PAD(cbpad);
163 volatile unchar esp_cmnd; /* rw SCSI command bits 0x0c */
164 EREGS_PAD(stpad);
165 volatile unchar esp_status; /* ro ESP status register 0x10 */
166#define esp_busid esp_status /* wo Bus ID for select/reselect 0x10 */
167 EREGS_PAD(irqpd);
168 volatile unchar esp_intrpt; /* ro Kind of interrupt 0x14 */
169#define esp_timeo esp_intrpt /* wo Timeout value for select/resel 0x14 */
170 EREGS_PAD(sspad);
171 volatile unchar esp_sstep; /* ro Sequence step register 0x18 */
172#define esp_stp esp_sstep /* wo Transfer period per sync 0x18 */
173 EREGS_PAD(ffpad);
174 volatile unchar esp_fflags; /* ro Bits of current FIFO info 0x1c */
175#define esp_soff esp_fflags /* wo Sync offset 0x1c */
176 EREGS_PAD(cf1pd);
177 volatile unchar esp_cfg1; /* rw First configuration register 0x20 */
178 EREGS_PAD(cfpad);
179 volatile unchar esp_cfact; /* wo Clock conversion factor 0x24 */
180 EREGS_PAD(ctpad);
181 volatile unchar esp_ctest; /* wo Chip test register 0x28 */
182 EREGS_PAD(cf2pd);
183 volatile unchar esp_cfg2; /* rw Second configuration register 0x2c */
184 EREGS_PAD(cf3pd);
185
186 /* The following is only found on the 53C9X series SCSI chips */
187 volatile unchar esp_cfg3; /* rw Third configuration register 0x30 */
188 EREGS_PAD(cf4pd);
189 volatile unchar esp_cfg4; /* rw Fourth configuration register 0x34 */
190 EREGS_PAD(thpd);
191 /* The following is found on all chips except the NCR53C90 (ESP100) */
192 volatile unchar esp_tchi; /* rw High bits of transfer count 0x38 */
193#define esp_uid esp_tchi /* ro Unique ID code 0x38 */
194 EREGS_PAD(fgpad);
195 volatile unchar esp_fgrnd; /* rw Data base for fifo 0x3c */
196};
197
198#else /* MULTIPLE_PAD_SIZES */
199
200#define esp_write(__reg, __val) (*(__reg) = (__val))
201#define esp_read(__reg) (*(__reg))
202
203struct ESP_regs {
204 unsigned char io_addr[64]; /* dummy */
205 /* Access Description Offset */
206#define esp_tclow io_addr /* rw Low bits of the transfer count 0x00 */
207#define esp_tcmed io_addr + (1<<(esp->shift)) /* rw Mid bits of the transfer count 0x04 */
208#define esp_fdata io_addr + (2<<(esp->shift)) /* rw FIFO data bits 0x08 */
209#define esp_cmnd io_addr + (3<<(esp->shift)) /* rw SCSI command bits 0x0c */
210#define esp_status io_addr + (4<<(esp->shift)) /* ro ESP status register 0x10 */
211#define esp_busid esp_status /* wo Bus ID for select/reselect 0x10 */
212#define esp_intrpt io_addr + (5<<(esp->shift)) /* ro Kind of interrupt 0x14 */
213#define esp_timeo esp_intrpt /* wo Timeout value for select/resel 0x14 */
214#define esp_sstep io_addr + (6<<(esp->shift)) /* ro Sequence step register 0x18 */
215#define esp_stp esp_sstep /* wo Transfer period per sync 0x18 */
216#define esp_fflags io_addr + (7<<(esp->shift)) /* ro Bits of current FIFO info 0x1c */
217#define esp_soff esp_fflags /* wo Sync offset 0x1c */
218#define esp_cfg1 io_addr + (8<<(esp->shift)) /* rw First configuration register 0x20 */
219#define esp_cfact io_addr + (9<<(esp->shift)) /* wo Clock conversion factor 0x24 */
220#define esp_ctest io_addr + (10<<(esp->shift)) /* wo Chip test register 0x28 */
221#define esp_cfg2 io_addr + (11<<(esp->shift)) /* rw Second configuration register 0x2c */
222
223 /* The following is only found on the 53C9X series SCSI chips */
224#define esp_cfg3 io_addr + (12<<(esp->shift)) /* rw Third configuration register 0x30 */
225#define esp_cfg4 io_addr + (13<<(esp->shift)) /* rw Fourth configuration register 0x34 */
226
227 /* The following is found on all chips except the NCR53C90 (ESP100) */
228#define esp_tchi io_addr + (14<<(esp->shift)) /* rw High bits of transfer count 0x38 */
229#define esp_uid esp_tchi /* ro Unique ID code 0x38 */
230#define esp_fgrnd io_addr + (15<<(esp->shift)) /* rw Data base for fifo 0x3c */
231};
232
233#endif
234
235#else /* !defined(__i386__) && !defined(__x86_64__) */
236
237#define esp_write(__reg, __val) outb((__val), (__reg))
238#define esp_read(__reg) inb((__reg))
239
240struct ESP_regs {
241 unsigned int io_addr;
242 /* Access Description Offset */
243#define esp_tclow io_addr /* rw Low bits of the transfer count 0x00 */
244#define esp_tcmed io_addr + 1 /* rw Mid bits of the transfer count 0x04 */
245#define esp_fdata io_addr + 2 /* rw FIFO data bits 0x08 */
246#define esp_cmnd io_addr + 3 /* rw SCSI command bits 0x0c */
247#define esp_status io_addr + 4 /* ro ESP status register 0x10 */
248#define esp_busid esp_status /* wo Bus ID for select/reselect 0x10 */
249#define esp_intrpt io_addr + 5 /* ro Kind of interrupt 0x14 */
250#define esp_timeo esp_intrpt /* wo Timeout value for select/resel 0x14 */
251#define esp_sstep io_addr + 6 /* ro Sequence step register 0x18 */
252#define esp_stp esp_sstep /* wo Transfer period per sync 0x18 */
253#define esp_fflags io_addr + 7 /* ro Bits of current FIFO info 0x1c */
254#define esp_soff esp_fflags /* wo Sync offset 0x1c */
255#define esp_cfg1 io_addr + 8 /* rw First configuration register 0x20 */
256#define esp_cfact io_addr + 9 /* wo Clock conversion factor 0x24 */
257#define esp_ctest io_addr + 10 /* wo Chip test register 0x28 */
258#define esp_cfg2 io_addr + 11 /* rw Second configuration register 0x2c */
259
260 /* The following is only found on the 53C9X series SCSI chips */
261#define esp_cfg3 io_addr + 12 /* rw Third configuration register 0x30 */
262#define esp_cfg4 io_addr + 13 /* rw Fourth configuration register 0x34 */
263
264 /* The following is found on all chips except the NCR53C90 (ESP100) */
265#define esp_tchi io_addr + 14 /* rw High bits of transfer count 0x38 */
266#define esp_uid esp_tchi /* ro Unique ID code 0x38 */
267#define esp_fgrnd io_addr + 15 /* rw Data base for fifo 0x3c */
268};
269
270#endif /* !defined(__i386__) && !defined(__x86_64__) */
271
272/* Various revisions of the ESP board. */
273enum esp_rev {
274 esp100 = 0x00, /* NCR53C90 - very broken */
275 esp100a = 0x01, /* NCR53C90A */
276 esp236 = 0x02,
277 fas236 = 0x03,
278 fas100a = 0x04,
279 fast = 0x05,
280 fas366 = 0x06,
281 fas216 = 0x07,
282 fsc = 0x08, /* SYM53C94-2 */
283 espunknown = 0x09
284};
285
286/* We allocate one of these for each scsi device and attach it to
287 * SDptr->hostdata for use in the driver
288 */
289struct esp_device {
290 unsigned char sync_min_period;
291 unsigned char sync_max_offset;
292 unsigned sync:1;
293 unsigned wide:1;
294 unsigned disconnect:1;
295};
296
297/* We get one of these for each ESP probed. */
298struct NCR_ESP {
299 struct NCR_ESP *next; /* Next ESP on probed or NULL */
300 struct ESP_regs *eregs; /* All esp registers */
301 int dma; /* Who I do transfers with. */
302 void *dregs; /* And his registers. */
303 struct Scsi_Host *ehost; /* Backpointer to SCSI Host */
304
305 void *edev; /* Pointer to controller base/SBus */
306 int esp_id; /* Unique per-ESP ID number */
307
308 /* ESP Configuration Registers */
309 unsigned char config1; /* Copy of the 1st config register */
310 unsigned char config2; /* Copy of the 2nd config register */
311 unsigned char config3[16]; /* Copy of the 3rd config register */
312
313 /* The current command we are sending to the ESP chip. This esp_command
314 * ptr needs to be mapped in DVMA area so we can send commands and read
315 * from the ESP fifo without burning precious CPU cycles. Programmed I/O
316 * sucks when we have the DVMA to do it for us. The ESP is stupid and will
317 * only send out 6, 10, and 12 byte SCSI commands, others we need to send
318 * one byte at a time. esp_slowcmd being set says that we are doing one
319 * of the command types ESP doesn't understand, esp_scmdp keeps track of
320 * which byte we are sending, esp_scmdleft says how many bytes to go.
321 */
322 volatile unchar *esp_command; /* Location of command (CPU view) */
323 __u32 esp_command_dvma; /* Location of command (DVMA view) */
324 unsigned char esp_clen; /* Length of this command */
325 unsigned char esp_slowcmd;
326 unsigned char *esp_scmdp;
327 unsigned char esp_scmdleft;
328
329 /* The following are used to determine the cause of an IRQ. Upon every
330 * IRQ entry we synchronize these with the hardware registers.
331 */
332 unchar ireg; /* Copy of ESP interrupt register */
333 unchar sreg; /* Same for ESP status register */
334 unchar seqreg; /* The ESP sequence register */
335
336 /* The following is set when a premature interrupt condition is detected
337 * in some FAS revisions.
338 */
339 unchar fas_premature_intr_workaround;
340
341 /* To save register writes to the ESP, which can be expensive, we
342 * keep track of the previous value that various registers had for
343 * the last target we connected to. If they are the same for the
344 * current target, we skip the register writes as they are not needed.
345 */
346 unchar prev_soff, prev_stp, prev_cfg3;
347
348 /* For each target we keep track of save/restore data
349 * pointer information. This needs to be updated majorly
350 * when we add support for tagged queueing. -DaveM
351 */
352 struct esp_pointers {
353 char *saved_ptr;
354 struct scatterlist *saved_buffer;
355 int saved_this_residual;
356 int saved_buffers_residual;
357 } data_pointers[16] /*XXX [MAX_TAGS_PER_TARGET]*/;
358
359 /* Clock periods, frequencies, synchronization, etc. */
360 unsigned int cfreq; /* Clock frequency in HZ */
361 unsigned int cfact; /* Clock conversion factor */
362 unsigned int ccycle; /* One ESP clock cycle */
363 unsigned int ctick; /* One ESP clock time */
364 unsigned int radelay; /* FAST chip req/ack delay */
365 unsigned int neg_defp; /* Default negotiation period */
366 unsigned int sync_defp; /* Default sync transfer period */
367 unsigned int max_period; /* longest our period can be */
368 unsigned int min_period; /* shortest period we can withstand */
369 /* For slow to medium speed input clock rates we shoot for 5mb/s,
370 * but for high input clock rates we try to do 10mb/s although I
371 * don't think a transfer can even run that fast with an ESP even
372 * with DMA2 scatter gather pipelining.
373 */
374#define SYNC_DEFP_SLOW 0x32 /* 5mb/s */
375#define SYNC_DEFP_FAST 0x19 /* 10mb/s */
376
377 unsigned int snip; /* Sync. negotiation in progress */
378 unsigned int wnip; /* WIDE negotiation in progress */
379 unsigned int targets_present; /* targets spoken to before */
380
381 int current_transfer_size; /* Set at beginning of data dma */
382
383 unchar espcmdlog[32]; /* Log of current esp cmds sent. */
384 unchar espcmdent; /* Current entry in esp cmd log. */
385
386 /* Misc. info about this ESP */
387 enum esp_rev erev; /* ESP revision */
388 int irq; /* IRQ for this ESP */
389 int scsi_id; /* Who am I as initiator? */
390 int scsi_id_mask; /* Bitmask of 'me'. */
391 int diff; /* Differential SCSI bus? */
392 int slot; /* Slot the adapter occupies */
393
394 /* Our command queues, only one cmd lives in the current_SC queue. */
395 Scsi_Cmnd *issue_SC; /* Commands to be issued */
396 Scsi_Cmnd *current_SC; /* Who is currently working the bus */
397 Scsi_Cmnd *disconnected_SC; /* Commands disconnected from the bus */
398
399 /* Message goo */
400 unchar cur_msgout[16];
401 unchar cur_msgin[16];
402 unchar prevmsgout, prevmsgin;
403 unchar msgout_len, msgin_len;
404 unchar msgout_ctr, msgin_ctr;
405
406 /* States that we cannot keep in the per cmd structure because they
407 * cannot be assosciated with any specific command.
408 */
409 unchar resetting_bus;
410 wait_queue_head_t reset_queue;
411
412 unchar do_pio_cmds; /* Do command transfer with pio */
413
414 /* How much bits do we have to shift the registers */
415 unsigned char shift;
416
417 /* Functions handling DMA
418 */
419 /* Required functions */
420 int (*dma_bytes_sent)(struct NCR_ESP *, int);
421 int (*dma_can_transfer)(struct NCR_ESP *, Scsi_Cmnd *);
422 void (*dma_dump_state)(struct NCR_ESP *);
423 void (*dma_init_read)(struct NCR_ESP *, __u32, int);
424 void (*dma_init_write)(struct NCR_ESP *, __u32, int);
425 void (*dma_ints_off)(struct NCR_ESP *);
426 void (*dma_ints_on)(struct NCR_ESP *);
427 int (*dma_irq_p)(struct NCR_ESP *);
428 int (*dma_ports_p)(struct NCR_ESP *);
429 void (*dma_setup)(struct NCR_ESP *, __u32, int, int);
430
431 /* Optional functions (i.e. may be initialized to 0) */
432 void (*dma_barrier)(struct NCR_ESP *);
433 void (*dma_drain)(struct NCR_ESP *);
434 void (*dma_invalidate)(struct NCR_ESP *);
435 void (*dma_irq_entry)(struct NCR_ESP *);
436 void (*dma_irq_exit)(struct NCR_ESP *);
437 void (*dma_led_off)(struct NCR_ESP *);
438 void (*dma_led_on)(struct NCR_ESP *);
439 void (*dma_poll)(struct NCR_ESP *, unsigned char *);
440 void (*dma_reset)(struct NCR_ESP *);
441
442 /* Optional virtual DMA functions */
443 void (*dma_mmu_get_scsi_one)(struct NCR_ESP *, Scsi_Cmnd *);
444 void (*dma_mmu_get_scsi_sgl)(struct NCR_ESP *, Scsi_Cmnd *);
445 void (*dma_mmu_release_scsi_one)(struct NCR_ESP *, Scsi_Cmnd *);
446 void (*dma_mmu_release_scsi_sgl)(struct NCR_ESP *, Scsi_Cmnd *);
447 void (*dma_advance_sg)(Scsi_Cmnd *);
448};
449
450/* Bitfield meanings for the above registers. */
451
452/* ESP config reg 1, read-write, found on all ESP chips */
453#define ESP_CONFIG1_ID 0x07 /* My BUS ID bits */
454#define ESP_CONFIG1_CHTEST 0x08 /* Enable ESP chip tests */
455#define ESP_CONFIG1_PENABLE 0x10 /* Enable parity checks */
456#define ESP_CONFIG1_PARTEST 0x20 /* Parity test mode enabled? */
457#define ESP_CONFIG1_SRRDISAB 0x40 /* Disable SCSI reset reports */
458#define ESP_CONFIG1_SLCABLE 0x80 /* Enable slow cable mode */
459
460/* ESP config reg 2, read-write, found only on esp100a+esp200+esp236+fsc chips */
461#define ESP_CONFIG2_DMAPARITY 0x01 /* enable DMA Parity (200,236,fsc) */
462#define ESP_CONFIG2_REGPARITY 0x02 /* enable reg Parity (200,236,fsc) */
463#define ESP_CONFIG2_BADPARITY 0x04 /* Bad parity target abort */
464#define ESP_CONFIG2_SCSI2ENAB 0x08 /* Enable SCSI-2 features (tmode only) */
465#define ESP_CONFIG2_HI 0x10 /* High Impedance DREQ ??? */
466#define ESP_CONFIG2_HMEFENAB 0x10 /* HME features enable */
467#define ESP_CONFIG2_BCM 0x20 /* Enable byte-ctrl (236,fsc) */
468#define ESP_CONFIG2_FENAB 0x40 /* Enable features (fas100,esp216,fsc) */
469#define ESP_CONFIG2_SPL 0x40 /* Enable status-phase latch (esp236) */
470#define ESP_CONFIG2_RFB 0x80 /* Reserve FIFO byte (fsc) */
471#define ESP_CONFIG2_MAGIC 0xe0 /* Invalid bits... */
472
473/* ESP config register 3 read-write, found only esp236+fas236+fas100a+fsc chips */
474#define ESP_CONFIG3_FCLOCK 0x01 /* FAST SCSI clock rate (esp100a/fas366) */
475#define ESP_CONFIG3_TEM 0x01 /* Enable thresh-8 mode (esp/fas236/fsc) */
476#define ESP_CONFIG3_FAST 0x02 /* Enable FAST SCSI (esp100a) */
477#define ESP_CONFIG3_ADMA 0x02 /* Enable alternate-dma (esp/fas236/fsc) */
478#define ESP_CONFIG3_TENB 0x04 /* group2 SCSI2 support (esp100a) */
479#define ESP_CONFIG3_SRB 0x04 /* Save residual byte (esp/fas236/fsc) */
480#define ESP_CONFIG3_TMS 0x08 /* Three-byte msg's ok (esp100a) */
481#define ESP_CONFIG3_FCLK 0x08 /* Fast SCSI clock rate (esp/fas236/fsc) */
482#define ESP_CONFIG3_IDMSG 0x10 /* ID message checking (esp100a) */
483#define ESP_CONFIG3_FSCSI 0x10 /* Enable FAST SCSI (esp/fas236/fsc) */
484#define ESP_CONFIG3_GTM 0x20 /* group2 SCSI2 support (esp/fas236/fsc) */
485#define ESP_CONFIG3_TBMS 0x40 /* Three-byte msg's ok (esp/fas236/fsc) */
486#define ESP_CONFIG3_IMS 0x80 /* ID msg chk'ng (esp/fas236/fsc) */
487
488/* ESP config register 4 read-write, found only on fsc chips */
489#define ESP_CONFIG4_BBTE 0x01 /* Back-to-Back transfer enable */
490#define ESP_CONFIG4_TEST 0x02 /* Transfer counter test mode */
491#define ESP_CONFIG4_EAN 0x04 /* Enable Active Negotiation */
492
493/* ESP command register read-write */
494/* Group 1 commands: These may be sent at any point in time to the ESP
495 * chip. None of them can generate interrupts 'cept
496 * the "SCSI bus reset" command if you have not disabled
497 * SCSI reset interrupts in the config1 ESP register.
498 */
499#define ESP_CMD_NULL 0x00 /* Null command, ie. a nop */
500#define ESP_CMD_FLUSH 0x01 /* FIFO Flush */
501#define ESP_CMD_RC 0x02 /* Chip reset */
502#define ESP_CMD_RS 0x03 /* SCSI bus reset */
503
504/* Group 2 commands: ESP must be an initiator and connected to a target
505 * for these commands to work.
506 */
507#define ESP_CMD_TI 0x10 /* Transfer Information */
508#define ESP_CMD_ICCSEQ 0x11 /* Initiator cmd complete sequence */
509#define ESP_CMD_MOK 0x12 /* Message okie-dokie */
510#define ESP_CMD_TPAD 0x18 /* Transfer Pad */
511#define ESP_CMD_SATN 0x1a /* Set ATN */
512#define ESP_CMD_RATN 0x1b /* De-assert ATN */
513
514/* Group 3 commands: ESP must be in the MSGOUT or MSGIN state and be connected
515 * to a target as the initiator for these commands to work.
516 */
517#define ESP_CMD_SMSG 0x20 /* Send message */
518#define ESP_CMD_SSTAT 0x21 /* Send status */
519#define ESP_CMD_SDATA 0x22 /* Send data */
520#define ESP_CMD_DSEQ 0x23 /* Discontinue Sequence */
521#define ESP_CMD_TSEQ 0x24 /* Terminate Sequence */
522#define ESP_CMD_TCCSEQ 0x25 /* Target cmd cmplt sequence */
523#define ESP_CMD_DCNCT 0x27 /* Disconnect */
524#define ESP_CMD_RMSG 0x28 /* Receive Message */
525#define ESP_CMD_RCMD 0x29 /* Receive Command */
526#define ESP_CMD_RDATA 0x2a /* Receive Data */
527#define ESP_CMD_RCSEQ 0x2b /* Receive cmd sequence */
528
529/* Group 4 commands: The ESP must be in the disconnected state and must
530 * not be connected to any targets as initiator for
531 * these commands to work.
532 */
533#define ESP_CMD_RSEL 0x40 /* Reselect */
534#define ESP_CMD_SEL 0x41 /* Select w/o ATN */
535#define ESP_CMD_SELA 0x42 /* Select w/ATN */
536#define ESP_CMD_SELAS 0x43 /* Select w/ATN & STOP */
537#define ESP_CMD_ESEL 0x44 /* Enable selection */
538#define ESP_CMD_DSEL 0x45 /* Disable selections */
539#define ESP_CMD_SA3 0x46 /* Select w/ATN3 */
540#define ESP_CMD_RSEL3 0x47 /* Reselect3 */
541
542/* This bit enables the ESP's DMA */
543#define ESP_CMD_DMA 0x80 /* Do DMA? */
544
545/* ESP status register read-only */
546#define ESP_STAT_PIO 0x01 /* IO phase bit */
547#define ESP_STAT_PCD 0x02 /* CD phase bit */
548#define ESP_STAT_PMSG 0x04 /* MSG phase bit */
549#define ESP_STAT_PMASK 0x07 /* Mask of phase bits */
550#define ESP_STAT_TDONE 0x08 /* Transfer Completed */
551#define ESP_STAT_TCNT 0x10 /* Transfer Counter Is Zero */
552#define ESP_STAT_PERR 0x20 /* Parity error */
553#define ESP_STAT_SPAM 0x40 /* Real bad error */
554/* This indicates the 'interrupt pending' condition, it is a reserved
555 * bit on old revs of the ESP (ESP100, ESP100A, FAS100A).
556 */
557#define ESP_STAT_INTR 0x80 /* Interrupt */
558
559/* The status register can be masked with ESP_STAT_PMASK and compared
560 * with the following values to determine the current phase the ESP
561 * (at least thinks it) is in. For our purposes we also add our own
562 * software 'done' bit for our phase management engine.
563 */
564#define ESP_DOP (0) /* Data Out */
565#define ESP_DIP (ESP_STAT_PIO) /* Data In */
566#define ESP_CMDP (ESP_STAT_PCD) /* Command */
567#define ESP_STATP (ESP_STAT_PCD|ESP_STAT_PIO) /* Status */
568#define ESP_MOP (ESP_STAT_PMSG|ESP_STAT_PCD) /* Message Out */
569#define ESP_MIP (ESP_STAT_PMSG|ESP_STAT_PCD|ESP_STAT_PIO) /* Message In */
570
571/* ESP interrupt register read-only */
572#define ESP_INTR_S 0x01 /* Select w/o ATN */
573#define ESP_INTR_SATN 0x02 /* Select w/ATN */
574#define ESP_INTR_RSEL 0x04 /* Reselected */
575#define ESP_INTR_FDONE 0x08 /* Function done */
576#define ESP_INTR_BSERV 0x10 /* Bus service */
577#define ESP_INTR_DC 0x20 /* Disconnect */
578#define ESP_INTR_IC 0x40 /* Illegal command given */
579#define ESP_INTR_SR 0x80 /* SCSI bus reset detected */
580
581/* Interrupt status macros */
582#define ESP_SRESET_IRQ(esp) ((esp)->intreg & (ESP_INTR_SR))
583#define ESP_ILLCMD_IRQ(esp) ((esp)->intreg & (ESP_INTR_IC))
584#define ESP_SELECT_WITH_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_SATN))
585#define ESP_SELECT_WITHOUT_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_S))
586#define ESP_SELECTION_IRQ(esp) ((ESP_SELECT_WITH_ATN_IRQ(esp)) || \
587 (ESP_SELECT_WITHOUT_ATN_IRQ(esp)))
588#define ESP_RESELECTION_IRQ(esp) ((esp)->intreg & (ESP_INTR_RSEL))
589
590/* ESP sequence step register read-only */
591#define ESP_STEP_VBITS 0x07 /* Valid bits */
592#define ESP_STEP_ASEL 0x00 /* Selection&Arbitrate cmplt */
593#define ESP_STEP_SID 0x01 /* One msg byte sent */
594#define ESP_STEP_NCMD 0x02 /* Was not in command phase */
595#define ESP_STEP_PPC 0x03 /* Early phase chg caused cmnd
596 * bytes to be lost
597 */
598#define ESP_STEP_FINI4 0x04 /* Command was sent ok */
599
600/* Ho hum, some ESP's set the step register to this as well... */
601#define ESP_STEP_FINI5 0x05
602#define ESP_STEP_FINI6 0x06
603#define ESP_STEP_FINI7 0x07
604#define ESP_STEP_SOM 0x08 /* Synchronous Offset Max */
605
606/* ESP chip-test register read-write */
607#define ESP_TEST_TARG 0x01 /* Target test mode */
608#define ESP_TEST_INI 0x02 /* Initiator test mode */
609#define ESP_TEST_TS 0x04 /* Tristate test mode */
610
611/* ESP unique ID register read-only, found on fas236+fas100a+fsc only */
612#define ESP_UID_F100A 0x00 /* FAS100A */
613#define ESP_UID_F236 0x02 /* FAS236 */
614#define ESP_UID_FSC 0xa2 /* NCR53CF9x-2 */
615#define ESP_UID_REV 0x07 /* ESP revision */
616#define ESP_UID_FAM 0xf8 /* ESP family */
617
618/* ESP fifo flags register read-only */
619/* Note that the following implies a 16 byte FIFO on the ESP. */
620#define ESP_FF_FBYTES 0x1f /* Num bytes in FIFO */
621#define ESP_FF_ONOTZERO 0x20 /* offset ctr not zero (esp100,fsc) */
622#define ESP_FF_SSTEP 0xe0 /* Sequence step */
623
624/* ESP clock conversion factor register write-only */
625#define ESP_CCF_F0 0x00 /* 35.01MHz - 40MHz */
626#define ESP_CCF_NEVER 0x01 /* Set it to this and die */
627#define ESP_CCF_F2 0x02 /* 10MHz */
628#define ESP_CCF_F3 0x03 /* 10.01MHz - 15MHz */
629#define ESP_CCF_F4 0x04 /* 15.01MHz - 20MHz */
630#define ESP_CCF_F5 0x05 /* 20.01MHz - 25MHz */
631#define ESP_CCF_F6 0x06 /* 25.01MHz - 30MHz */
632#define ESP_CCF_F7 0x07 /* 30.01MHz - 35MHz */
633
634#define ESP_BUS_TIMEOUT 275 /* In milli-seconds */
635#define ESP_TIMEO_CONST 8192
636#define FSC_TIMEO_CONST 7668
637#define ESP_NEG_DEFP(mhz, cfact) \
638 ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact)))
639#define FSC_NEG_DEFP(mhz, cfact) \
640 ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (7668 * (cfact)))
641#define ESP_MHZ_TO_CYCLE(mhertz) ((1000000000) / ((mhertz) / 1000))
642#define ESP_TICK(ccf, cycle) ((7682 * (ccf) * (cycle) / 1000))
643
644
645/* UGLY, UGLY, UGLY! */
646extern int nesps, esps_in_use, esps_running;
647
648/* For our interrupt engine. */
649#define for_each_esp(esp) \
650 for((esp) = espchain; (esp); (esp) = (esp)->next)
651
652
653/* External functions */
654extern void esp_bootup_reset(struct NCR_ESP *esp, struct ESP_regs *eregs);
655extern struct NCR_ESP *esp_allocate(struct scsi_host_template *, void *);
656extern void esp_deallocate(struct NCR_ESP *);
657extern void esp_release(void);
658extern void esp_initialize(struct NCR_ESP *);
659extern irqreturn_t esp_intr(int, void *);
660extern const char *esp_info(struct Scsi_Host *);
661extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
662extern int esp_abort(Scsi_Cmnd *);
663extern int esp_reset(Scsi_Cmnd *);
664extern int esp_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset, int length,
665 int inout);
666extern int esp_slave_alloc(struct scsi_device *);
667extern void esp_slave_destroy(struct scsi_device *);
668#endif /* !(NCR53C9X_H) */