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