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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
[linux/fpc-iii.git] / drivers / scsi / arm / fas216.h
blobc57c16ef81936b9978482ecb46c16571d80c06fb
1 /*
2 * linux/drivers/acorn/scsi/fas216.h
3 *
4 * Copyright (C) 1997-2000 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * FAS216 generic driver
11 */
12 #ifndef FAS216_H
13 #define FAS216_H
14
15 #include <scsi/scsi_eh.h>
16
17 #include "queue.h"
18 #include "msgqueue.h"
19
20 /* FAS register definitions */
21
22 /* transfer count low */
23 #define REG_CTCL (0)
24 #define REG_STCL (0)
25
26 /* transfer count medium */
27 #define REG_CTCM (1)
28 #define REG_STCM (1)
29
30 /* fifo data */
31 #define REG_FF (2)
32
33 /* command */
34 #define REG_CMD (3)
35 #define CMD_NOP 0x00
36 #define CMD_FLUSHFIFO 0x01
37 #define CMD_RESETCHIP 0x02
38 #define CMD_RESETSCSI 0x03
39
40 #define CMD_TRANSFERINFO 0x10
41 #define CMD_INITCMDCOMPLETE 0x11
42 #define CMD_MSGACCEPTED 0x12
43 #define CMD_PADBYTES 0x18
44 #define CMD_SETATN 0x1a
45 #define CMD_RSETATN 0x1b
46
47 #define CMD_SELECTWOATN 0x41
48 #define CMD_SELECTATN 0x42
49 #define CMD_SELECTATNSTOP 0x43
50 #define CMD_ENABLESEL 0x44
51 #define CMD_DISABLESEL 0x45
52 #define CMD_SELECTATN3 0x46
53 #define CMD_RESEL3 0x47
54
55 #define CMD_WITHDMA 0x80
56
57 /* status register (read) */
58 #define REG_STAT (4)
59 #define STAT_IO (1 << 0) /* IO phase */
60 #define STAT_CD (1 << 1) /* CD phase */
61 #define STAT_MSG (1 << 2) /* MSG phase */
62 #define STAT_TRANSFERDONE (1 << 3) /* Transfer completed */
63 #define STAT_TRANSFERCNTZ (1 << 4) /* Transfer counter is zero */
64 #define STAT_PARITYERROR (1 << 5) /* Parity error */
65 #define STAT_REALBAD (1 << 6) /* Something bad */
66 #define STAT_INT (1 << 7) /* Interrupt */
67
68 #define STAT_BUSMASK (STAT_MSG|STAT_CD|STAT_IO)
69 #define STAT_DATAOUT (0) /* Data out */
70 #define STAT_DATAIN (STAT_IO) /* Data in */
71 #define STAT_COMMAND (STAT_CD) /* Command out */
72 #define STAT_STATUS (STAT_CD|STAT_IO) /* Status In */
73 #define STAT_MESGOUT (STAT_MSG|STAT_CD) /* Message out */
74 #define STAT_MESGIN (STAT_MSG|STAT_CD|STAT_IO) /* Message In */
75
76 /* bus ID for select / reselect */
77 #define REG_SDID (4)
78 #define BUSID(target) ((target) & 7)
79
80 /* Interrupt status register (read) */
81 #define REG_INST (5)
82 #define INST_SELWOATN (1 << 0) /* Select w/o ATN */
83 #define INST_SELATN (1 << 1) /* Select w/ATN */
84 #define INST_RESELECTED (1 << 2) /* Reselected */
85 #define INST_FUNCDONE (1 << 3) /* Function done */
86 #define INST_BUSSERVICE (1 << 4) /* Bus service */
87 #define INST_DISCONNECT (1 << 5) /* Disconnect */
88 #define INST_ILLEGALCMD (1 << 6) /* Illegal command */
89 #define INST_BUSRESET (1 << 7) /* SCSI Bus reset */
90
91 /* Timeout register (write) */
92 #define REG_STIM (5)
93
94 /* Sequence step register (read) */
95 #define REG_IS (6)
96 #define IS_BITS 0x07
97 #define IS_SELARB 0x00 /* Select & Arb ok */
98 #define IS_MSGBYTESENT 0x01 /* One byte message sent*/
99 #define IS_NOTCOMMAND 0x02 /* Not in command state */
100 #define IS_EARLYPHASE 0x03 /* Early phase change */
101 #define IS_COMPLETE 0x04 /* Command ok */
102 #define IS_SOF 0x08 /* Sync off flag */
103
104 /* Transfer period step (write) */
105 #define REG_STP (6)
106
107 /* Synchronous Offset (write) */
108 #define REG_SOF (7)
109
110 /* Fifo state register (read) */
111 #define REG_CFIS (7)
112 #define CFIS_CF 0x1f /* Num bytes in FIFO */
113 #define CFIS_IS 0xe0 /* Step */
114
115 /* config register 1 */
116 #define REG_CNTL1 (8)
117 #define CNTL1_CID (7 << 0) /* Chip ID */
118 #define CNTL1_STE (1 << 3) /* Self test enable */
119 #define CNTL1_PERE (1 << 4) /* Parity enable reporting en. */
120 #define CNTL1_PTE (1 << 5) /* Parity test enable */
121 #define CNTL1_DISR (1 << 6) /* Disable Irq on SCSI reset */
122 #define CNTL1_ETM (1 << 7) /* Extended Timing Mode */
123
124 /* Clock conversion factor (read) */
125 #define REG_CLKF (9)
126 #define CLKF_F37MHZ 0x00 /* 35.01 - 40 MHz */
127 #define CLKF_F10MHZ 0x02 /* 10 MHz */
128 #define CLKF_F12MHZ 0x03 /* 10.01 - 15 MHz */
129 #define CLKF_F17MHZ 0x04 /* 15.01 - 20 MHz */
130 #define CLKF_F22MHZ 0x05 /* 20.01 - 25 MHz */
131 #define CLKF_F27MHZ 0x06 /* 25.01 - 30 MHz */
132 #define CLKF_F32MHZ 0x07 /* 30.01 - 35 MHz */
133
134 /* Chip test register (write) */
135 #define REG_FTM (10)
136 #define TEST_FTM 0x01 /* Force target mode */
137 #define TEST_FIM 0x02 /* Force initiator mode */
138 #define TEST_FHI 0x04 /* Force high impedance mode */
139
140 /* Configuration register 2 (read/write) */
141 #define REG_CNTL2 (11)
142 #define CNTL2_PGDP (1 << 0) /* Pass Th/Generate Data Parity */
143 #define CNTL2_PGRP (1 << 1) /* Pass Th/Generate Reg Parity */
144 #define CNTL2_ACDPE (1 << 2) /* Abort on Cmd/Data Parity Err */
145 #define CNTL2_S2FE (1 << 3) /* SCSI2 Features Enable */
146 #define CNTL2_TSDR (1 << 4) /* Tristate DREQ */
147 #define CNTL2_SBO (1 << 5) /* Select Byte Order */
148 #define CNTL2_ENF (1 << 6) /* Enable features */
149 #define CNTL2_DAE (1 << 7) /* Data Alignment Enable */
150
151 /* Configuration register 3 (read/write) */
152 #define REG_CNTL3 (12)
153 #define CNTL3_BS8 (1 << 0) /* Burst size 8 */
154 #define CNTL3_MDM (1 << 1) /* Modify DMA mode */
155 #define CNTL3_LBTM (1 << 2) /* Last Byte Transfer mode */
156 #define CNTL3_FASTCLK (1 << 3) /* Fast SCSI clocking */
157 #define CNTL3_FASTSCSI (1 << 4) /* Fast SCSI */
158 #define CNTL3_G2CB (1 << 5) /* Group2 SCSI support */
159 #define CNTL3_QTAG (1 << 6) /* Enable 3 byte msgs */
160 #define CNTL3_ADIDCHK (1 << 7) /* Additional ID check */
161
162 /* High transfer count (read/write) */
163 #define REG_CTCH (14)
164 #define REG_STCH (14)
165
166 /* ID register (read only) */
167 #define REG_ID (14)
168
169 /* Data alignment */
170 #define REG_DAL (15)
171
172 typedef enum {
173 PHASE_IDLE, /* we're not planning on doing anything */
174 PHASE_SELECTION, /* selecting a device */
175 PHASE_SELSTEPS, /* selection with command steps */
176 PHASE_COMMAND, /* command sent */
177 PHASE_MESSAGESENT, /* selected, and we're sending cmd */
178 PHASE_DATAOUT, /* data out to device */
179 PHASE_DATAIN, /* data in from device */
180 PHASE_MSGIN, /* message in from device */
181 PHASE_MSGIN_DISCONNECT, /* disconnecting from bus */
182 PHASE_MSGOUT, /* after message out phase */
183 PHASE_MSGOUT_EXPECT, /* expecting message out */
184 PHASE_STATUS, /* status from device */
185 PHASE_DONE /* Command complete */
186 } phase_t;
187
188 typedef enum {
189 DMA_OUT, /* DMA from memory to chip */
190 DMA_IN /* DMA from chip to memory */
191 } fasdmadir_t;
192
193 typedef enum {
194 fasdma_none, /* No dma */
195 fasdma_pio, /* PIO mode */
196 fasdma_pseudo, /* Pseudo DMA */
197 fasdma_real_block, /* Real DMA, on block by block basis */
198 fasdma_real_all /* Real DMA, on request by request */
199 } fasdmatype_t;
200
201 typedef enum {
202 neg_wait, /* Negotiate with device */
203 neg_inprogress, /* Negotiation sent */
204 neg_complete, /* Negotiation complete */
205 neg_targcomplete, /* Target completed negotiation */
206 neg_invalid /* Negotiation not supported */
207 } neg_t;
208
209 #define MAGIC 0x441296bdUL
210 #define NR_MSGS 8
211
212 #define FASCAP_DMA (1 << 0)
213 #define FASCAP_PSEUDODMA (1 << 1)
214
215 typedef struct {
216 unsigned long magic_start;
217 spinlock_t host_lock;
218 struct Scsi_Host *host; /* host */
219 struct scsi_cmnd *SCpnt; /* currently processing command */
220 struct scsi_cmnd *origSCpnt; /* original connecting command */
221 struct scsi_cmnd *reqSCpnt; /* request sense command */
222 struct scsi_cmnd *rstSCpnt; /* reset command */
223 struct scsi_cmnd *pending_SCpnt[8]; /* per-device pending commands */
224 int next_pending; /* next pending device */
225
226 /*
227 * Error recovery
228 */
229 wait_queue_head_t eh_wait;
230 struct timer_list eh_timer;
231 unsigned int rst_dev_status;
232 unsigned int rst_bus_status;
233
234 /* driver information */
235 struct {
236 phase_t phase; /* current phase */
237 void __iomem *io_base; /* iomem base of FAS216 */
238 unsigned int io_shift; /* shift to adjust reg offsets by */
239 unsigned char cfg[4]; /* configuration registers */
240 const char *type; /* chip type */
241 unsigned int irq; /* interrupt */
242 int dma; /* dma channel */
243
244 struct scsi_pointer SCp; /* current commands data pointer */
245
246 MsgQueue_t msgs; /* message queue for connected device */
247
248 unsigned int async_stp; /* Async transfer STP value */
249 unsigned char msgin_fifo; /* bytes in fifo at time of message in */
250 unsigned char message[256]; /* last message received from device */
251
252 unsigned char disconnectable:1; /* this command can be disconnected */
253 unsigned char aborting:1; /* aborting command */
254 } scsi;
255
256 /* statistics information */
257 struct {
258 unsigned int queues;
259 unsigned int removes;
260 unsigned int fins;
261 unsigned int reads;
262 unsigned int writes;
263 unsigned int miscs;
264 unsigned int disconnects;
265 unsigned int aborts;
266 unsigned int bus_resets;
267 unsigned int host_resets;
268 } stats;
269
270 /* configuration information */
271 struct {
272 unsigned char clockrate; /* clock rate of FAS device (MHz) */
273 unsigned char select_timeout; /* timeout (R5) */
274 unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */
275 unsigned char wide_max_size; /* Maximum wide transfer size */
276 unsigned char cntl3; /* Control Reg 3 */
277 unsigned int asyncperiod; /* Async transfer period (ns) */
278 unsigned int capabilities; /* driver capabilities */
279 unsigned int disconnect_ok:1; /* Disconnects allowed? */
280 } ifcfg;
281
282 /* queue handling */
283 struct {
284 Queue_t issue; /* issue queue */
285 Queue_t disconnected; /* disconnected command queue */
286 } queues;
287
288 /* per-device info */
289 struct fas216_device {
290 unsigned char disconnect_ok:1; /* device can disconnect */
291 unsigned char parity_enabled:1; /* parity checking enabled */
292 unsigned char parity_check:1; /* need to check parity checking */
293 unsigned char period; /* sync xfer period in (*4ns) */
294 unsigned char stp; /* synchronous transfer period */
295 unsigned char sof; /* synchronous offset register */
296 unsigned char wide_xfer; /* currently negociated wide transfer */
297 neg_t sync_state; /* synchronous transfer mode */
298 neg_t wide_state; /* wide transfer mode */
299 } device[8];
300 unsigned long busyluns[64/sizeof(unsigned long)];/* array of bits indicating LUNs busy */
301
302 /* dma */
303 struct {
304 fasdmatype_t transfer_type; /* current type of DMA transfer */
305 fasdmatype_t (*setup) (struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma);
306 void (*pseudo)(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, int transfer);
307 void (*stop) (struct Scsi_Host *host, struct scsi_pointer *SCp);
308 } dma;
309
310 /* miscellaneous */
311 int internal_done; /* flag to indicate request done */
312 struct scsi_eh_save ses; /* holds request sense restore info */
313 unsigned long magic_end;
314 } FAS216_Info;
315
316 /* Function: int fas216_init (struct Scsi_Host *instance)
317 * Purpose : initialise FAS/NCR/AMD SCSI structures.
318 * Params : instance - a driver-specific filled-out structure
319 * Returns : 0 on success
320 */
321 extern int fas216_init (struct Scsi_Host *instance);
322
323 /* Function: int fas216_add (struct Scsi_Host *instance, struct device *dev)
324 * Purpose : initialise FAS/NCR/AMD SCSI ic.
325 * Params : instance - a driver-specific filled-out structure
326 * Returns : 0 on success
327 */
328 extern int fas216_add (struct Scsi_Host *instance, struct device *dev);
329
330 /* Function: int fas216_queue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt)
331 * Purpose : queue a command for adapter to process.
332 * Params : h - host adapter
333 * : SCpnt - Command to queue
334 * Returns : 0 - success, else error
335 */
336 extern int fas216_queue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt);
337
338 /* Function: int fas216_noqueue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt)
339 * Purpose : queue a command for adapter to process, and process it to completion.
340 * Params : h - host adapter
341 * : SCpnt - Command to queue
342 * Returns : 0 - success, else error
343 */
344 extern int fas216_noqueue_command(struct Scsi_Host *, struct scsi_cmnd *);
345
346 /* Function: irqreturn_t fas216_intr (FAS216_Info *info)
347 * Purpose : handle interrupts from the interface to progress a command
348 * Params : info - interface to service
349 */
350 extern irqreturn_t fas216_intr (FAS216_Info *info);
351
352 extern void fas216_remove (struct Scsi_Host *instance);
353
354 /* Function: void fas216_release (struct Scsi_Host *instance)
355 * Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
356 * Params : instance - a driver-specific filled-out structure
357 * Returns : 0 on success
358 */
359 extern void fas216_release (struct Scsi_Host *instance);
360
361 extern void fas216_print_host(FAS216_Info *info, struct seq_file *m);
362 extern void fas216_print_stats(FAS216_Info *info, struct seq_file *m);
363 extern void fas216_print_devices(FAS216_Info *info, struct seq_file *m);
364
365 /* Function: int fas216_eh_abort(struct scsi_cmnd *SCpnt)
366 * Purpose : abort this command
367 * Params : SCpnt - command to abort
368 * Returns : FAILED if unable to abort
369 */
370 extern int fas216_eh_abort(struct scsi_cmnd *SCpnt);
371
372 /* Function: int fas216_eh_device_reset(struct scsi_cmnd *SCpnt)
373 * Purpose : Reset the device associated with this command
374 * Params : SCpnt - command specifing device to reset
375 * Returns : FAILED if unable to reset
376 */
377 extern int fas216_eh_device_reset(struct scsi_cmnd *SCpnt);
378
379 /* Function: int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt)
380 * Purpose : Reset the complete bus associated with this command
381 * Params : SCpnt - command specifing bus to reset
382 * Returns : FAILED if unable to reset
383 */
384 extern int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt);
385
386 /* Function: int fas216_eh_host_reset(struct scsi_cmnd *SCpnt)
387 * Purpose : Reset the host associated with this command
388 * Params : SCpnt - command specifing host to reset
389 * Returns : FAILED if unable to reset
390 */
391 extern int fas216_eh_host_reset(struct scsi_cmnd *SCpnt);
392
393 #endif /* FAS216_H */
Linux with added FPC-III support