2 * linux/drivers/acorn/scsi/fas216.h
4 * Copyright (C) 1997-2000 Russell King
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.
10 * FAS216 generic driver
22 /* FAS register definitions */
24 /* transfer count low */
25 #define REG_CTCL(x) ((x)->scsi.io_port)
26 #define REG_STCL(x) ((x)->scsi.io_port)
28 /* transfer count medium */
29 #define REG_CTCM(x) ((x)->scsi.io_port + (1 << (x)->scsi.io_shift))
30 #define REG_STCM(x) ((x)->scsi.io_port + (1 << (x)->scsi.io_shift))
33 #define REG_FF(x) ((x)->scsi.io_port + (2 << (x)->scsi.io_shift))
36 #define REG_CMD(x) ((x)->scsi.io_port + (3 << (x)->scsi.io_shift))
38 #define CMD_FLUSHFIFO 0x01
39 #define CMD_RESETCHIP 0x02
40 #define CMD_RESETSCSI 0x03
42 #define CMD_TRANSFERINFO 0x10
43 #define CMD_INITCMDCOMPLETE 0x11
44 #define CMD_MSGACCEPTED 0x12
45 #define CMD_PADBYTES 0x18
46 #define CMD_SETATN 0x1a
47 #define CMD_RSETATN 0x1b
49 #define CMD_SELECTWOATN 0x41
50 #define CMD_SELECTATN 0x42
51 #define CMD_SELECTATNSTOP 0x43
52 #define CMD_ENABLESEL 0x44
53 #define CMD_DISABLESEL 0x45
54 #define CMD_SELECTATN3 0x46
55 #define CMD_RESEL3 0x47
57 #define CMD_WITHDMA 0x80
59 /* status register (read) */
60 #define REG_STAT(x) ((x)->scsi.io_port + (4 << (x)->scsi.io_shift))
61 #define STAT_IO (1 << 0) /* IO phase */
62 #define STAT_CD (1 << 1) /* CD phase */
63 #define STAT_MSG (1 << 2) /* MSG phase */
64 #define STAT_TRANSFERDONE (1 << 3) /* Transfer completed */
65 #define STAT_TRANSFERCNTZ (1 << 4) /* Transfer counter is zero */
66 #define STAT_PARITYERROR (1 << 5) /* Parity error */
67 #define STAT_REALBAD (1 << 6) /* Something bad */
68 #define STAT_INT (1 << 7) /* Interrupt */
70 #define STAT_BUSMASK (STAT_MSG|STAT_CD|STAT_IO)
71 #define STAT_DATAOUT (0) /* Data out */
72 #define STAT_DATAIN (STAT_IO) /* Data in */
73 #define STAT_COMMAND (STAT_CD) /* Command out */
74 #define STAT_STATUS (STAT_CD|STAT_IO) /* Status In */
75 #define STAT_MESGOUT (STAT_MSG|STAT_CD) /* Message out */
76 #define STAT_MESGIN (STAT_MSG|STAT_CD|STAT_IO) /* Message In */
78 /* bus ID for select / reselect */
79 #define REG_SDID(x) ((x)->scsi.io_port + (4 << (x)->scsi.io_shift))
80 #define BUSID(target) ((target) & 7)
82 /* Interrupt status register (read) */
83 #define REG_INST(x) ((x)->scsi.io_port + (5 << (x)->scsi.io_shift))
84 #define INST_SELWOATN (1 << 0) /* Select w/o ATN */
85 #define INST_SELATN (1 << 1) /* Select w/ATN */
86 #define INST_RESELECTED (1 << 2) /* Reselected */
87 #define INST_FUNCDONE (1 << 3) /* Function done */
88 #define INST_BUSSERVICE (1 << 4) /* Bus service */
89 #define INST_DISCONNECT (1 << 5) /* Disconnect */
90 #define INST_ILLEGALCMD (1 << 6) /* Illegal command */
91 #define INST_BUSRESET (1 << 7) /* SCSI Bus reset */
93 /* Timeout register (write) */
94 #define REG_STIM(x) ((x)->scsi.io_port + (5 << (x)->scsi.io_shift))
96 /* Sequence step register (read) */
97 #define REG_IS(x) ((x)->scsi.io_port + (6 << (x)->scsi.io_shift))
99 #define IS_SELARB 0x00 /* Select & Arb ok */
100 #define IS_MSGBYTESENT 0x01 /* One byte message sent*/
101 #define IS_NOTCOMMAND 0x02 /* Not in command state */
102 #define IS_EARLYPHASE 0x03 /* Early phase change */
103 #define IS_COMPLETE 0x04 /* Command ok */
104 #define IS_SOF 0x08 /* Sync off flag */
106 /* Transfer period step (write) */
107 #define REG_STP(x) ((x)->scsi.io_port + (6 << (x)->scsi.io_shift))
109 /* Synchronous Offset (write) */
110 #define REG_SOF(x) ((x)->scsi.io_port + (7 << (x)->scsi.io_shift))
112 /* Fifo state register (read) */
113 #define REG_CFIS(x) ((x)->scsi.io_port + (7 << (x)->scsi.io_shift))
114 #define CFIS_CF 0x1f /* Num bytes in FIFO */
115 #define CFIS_IS 0xe0 /* Step */
117 /* config register 1 */
118 #define REG_CNTL1(x) ((x)->scsi.io_port + (8 << (x)->scsi.io_shift))
119 #define CNTL1_CID (7 << 0) /* Chip ID */
120 #define CNTL1_STE (1 << 3) /* Self test enable */
121 #define CNTL1_PERE (1 << 4) /* Parity enable reporting en. */
122 #define CNTL1_PTE (1 << 5) /* Parity test enable */
123 #define CNTL1_DISR (1 << 6) /* Disable Irq on SCSI reset */
124 #define CNTL1_ETM (1 << 7) /* Extended Timing Mode */
126 /* Clock conversion factor (read) */
127 #define REG_CLKF(x) ((x)->scsi.io_port + (9 << (x)->scsi.io_shift))
128 #define CLKF_F37MHZ 0x00 /* 35.01 - 40 MHz */
129 #define CLKF_F10MHZ 0x02 /* 10 MHz */
130 #define CLKF_F12MHZ 0x03 /* 10.01 - 15 MHz */
131 #define CLKF_F17MHZ 0x04 /* 15.01 - 20 MHz */
132 #define CLKF_F22MHZ 0x05 /* 20.01 - 25 MHz */
133 #define CLKF_F27MHZ 0x06 /* 25.01 - 30 MHz */
134 #define CLKF_F32MHZ 0x07 /* 30.01 - 35 MHz */
136 /* Chip test register (write) */
137 #define REG0_FTM(x) ((x)->scsi.io_port + (10 << (x)->scsi.io_shift))
138 #define TEST_FTM 0x01 /* Force target mode */
139 #define TEST_FIM 0x02 /* Force initiator mode */
140 #define TEST_FHI 0x04 /* Force high impedance mode */
142 /* Configuration register 2 (read/write) */
143 #define REG_CNTL2(x) ((x)->scsi.io_port + (11 << (x)->scsi.io_shift))
144 #define CNTL2_PGDP (1 << 0) /* Pass Th/Generate Data Parity */
145 #define CNTL2_PGRP (1 << 1) /* Pass Th/Generate Reg Parity */
146 #define CNTL2_ACDPE (1 << 2) /* Abort on Cmd/Data Parity Err */
147 #define CNTL2_S2FE (1 << 3) /* SCSI2 Features Enable */
148 #define CNTL2_TSDR (1 << 4) /* Tristate DREQ */
149 #define CNTL2_SBO (1 << 5) /* Select Byte Order */
150 #define CNTL2_ENF (1 << 6) /* Enable features */
151 #define CNTL2_DAE (1 << 7) /* Data Alignment Enable */
153 /* Configuration register 3 (read/write) */
154 #define REG_CNTL3(x) ((x)->scsi.io_port + (12 << (x)->scsi.io_shift))
155 #define CNTL3_BS8 (1 << 0) /* Burst size 8 */
156 #define CNTL3_MDM (1 << 1) /* Modify DMA mode */
157 #define CNTL3_LBTM (1 << 2) /* Last Byte Transfer mode */
158 #define CNTL3_FASTCLK (1 << 3) /* Fast SCSI clocking */
159 #define CNTL3_FASTSCSI (1 << 4) /* Fast SCSI */
160 #define CNTL3_G2CB (1 << 5) /* Group2 SCSI support */
161 #define CNTL3_QTAG (1 << 6) /* Enable 3 byte msgs */
162 #define CNTL3_ADIDCHK (1 << 7) /* Additional ID check */
164 /* High transfer count (read/write) */
165 #define REG_CTCH(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
166 #define REG_STCH(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
168 /* ID reigster (read only) */
169 #define REG1_ID(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
172 #define REG0_DAL(x) ((x)->scsi.io_port + (15 << (x)->scsi.io_shift))
175 PHASE_IDLE, /* we're not planning on doing anything */
176 PHASE_SELECTION, /* selecting a device */
177 PHASE_SELSTEPS, /* selection with command steps */
178 PHASE_COMMAND, /* command sent */
179 PHASE_MESSAGESENT, /* selected, and we're sending cmd */
180 PHASE_RECONNECTED, /* reconnected */
181 PHASE_DATAOUT, /* data out to device */
182 PHASE_DATAIN, /* data in from device */
183 PHASE_MSGIN, /* message in from device */
184 PHASE_MSGIN_DISCONNECT, /* disconnecting from bus */
185 PHASE_MSGOUT, /* after message out phase */
186 PHASE_MSGOUT_EXPECT, /* expecting message out */
187 PHASE_STATUS, /* status from device */
188 PHASE_DONE /* Command complete */
192 DMA_OUT, /* DMA from memory to chip */
193 DMA_IN /* DMA from chip to memory */
197 fasdma_none, /* No dma */
198 fasdma_pio, /* PIO mode */
199 fasdma_pseudo, /* Pseudo DMA */
200 fasdma_real_block, /* Real DMA, on block by block basis */
201 fasdma_real_all /* Real DMA, on request by request */
205 neg_wait, /* Negociate with device */
206 neg_inprogress, /* Negociation sent */
207 neg_complete, /* Negociation complete */
208 neg_targcomplete, /* Target completed negociation */
209 neg_invalid /* Negociation not supported */
212 #define MAGIC 0x441296bdUL
216 unsigned long magic_start;
217 struct Scsi_Host *host; /* host */
218 Scsi_Cmnd *SCpnt; /* currently processing command */
219 Scsi_Cmnd *origSCpnt; /* original connecting command */
220 Scsi_Cmnd *reqSCpnt; /* request sense command */
222 /* driver information */
224 unsigned int io_port; /* base address of FAS216 */
225 unsigned int io_shift; /* shift to adjust reg offsets by */
226 unsigned int irq; /* interrupt */
227 unsigned char cfg[4]; /* configuration registers */
228 const char *type; /* chip type */
229 phase_t phase; /* current phase */
232 unsigned char target; /* reconnected target */
233 unsigned char lun; /* reconnected lun */
234 unsigned char tag; /* reconnected tag */
237 Scsi_Pointer SCp; /* current commands data pointer */
239 MsgQueue_t msgs; /* message queue for connected device */
241 unsigned int async_stp; /* Async transfer STP value */
242 unsigned char msgin_fifo; /* bytes in fifo at time of message in */
243 unsigned char message[256]; /* last message received from device */
244 unsigned int msglen; /* length of last message received */
246 unsigned char disconnectable:1; /* this command can be disconnected */
247 unsigned char aborting:1; /* aborting command */
250 /* statistics information */
253 unsigned int removes;
258 unsigned int disconnects;
260 unsigned int bus_resets;
261 unsigned int host_resets;
264 /* configuration information */
266 unsigned char clockrate; /* clock rate of FAS device (MHz) */
267 unsigned char select_timeout; /* timeout (R5) */
268 unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */
269 unsigned char wide_max_size; /* Maximum wide transfer size */
270 unsigned char cntl3; /* Control Reg 3 */
271 unsigned int asyncperiod; /* Async transfer period (ns) */
272 unsigned int disconnect_ok:1; /* Disconnects allowed? */
277 Queue_t issue; /* issue queue */
278 Queue_t disconnected; /* disconnected command queue */
281 /* per-device info */
282 struct fas216_device {
283 unsigned char disconnect_ok:1; /* device can disconnect */
284 unsigned char period; /* sync xfer period in (*4ns) */
285 unsigned char stp; /* synchronous transfer period */
286 unsigned char sof; /* synchronous offset register */
287 unsigned char wide_xfer; /* currently negociated wide transfer */
288 neg_t sync_state; /* synchronous transfer mode */
289 neg_t wide_state; /* wide transfer mode */
291 unsigned char busyluns[8]; /* array of bits indicating LUNs busy */
295 fasdmatype_t transfer_type; /* current type of DMA transfer */
296 fasdmatype_t (*setup) (struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma);
297 void (*pseudo)(struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, int transfer);
298 void (*stop) (struct Scsi_Host *host, Scsi_Pointer *SCp);
302 int internal_done; /* flag to indicate request done */
304 unsigned long magic_end;
307 /* Function: int fas216_init (struct Scsi_Host *instance)
308 * Purpose : initialise FAS/NCR/AMD SCSI ic.
309 * Params : instance - a driver-specific filled-out structure
310 * Returns : 0 on success
312 extern int fas216_init (struct Scsi_Host *instance);
314 /* Function: int fas216_abort (Scsi_Cmnd *SCpnt)
315 * Purpose : abort a command if something horrible happens.
316 * Params : SCpnt - Command that is believed to be causing a problem.
317 * Returns : one of SCSI_ABORT_ macros.
319 extern int fas216_abort (Scsi_Cmnd *);
321 /* Function: int fas216_reset (Scsi_Cmnd *SCpnt, unsigned int reset_flags)
322 * Purpose : resets the adapter if something horrible happens.
323 * Params : SCpnt - Command that is believed to be causing a problem.
324 * reset_flags - flags indicating reset type that is believed to be required.
325 * Returns : one of SCSI_RESET_ macros, or'd with the SCSI_RESET_*_RESET macros.
327 extern int fas216_reset (Scsi_Cmnd *, unsigned int);
329 /* Function: int fas216_queue_command (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
330 * Purpose : queue a command for adapter to process.
331 * Params : SCpnt - Command to queue
332 * done - done function to call once command is complete
333 * Returns : 0 - success, else error
335 extern int fas216_queue_command (Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
337 /* Function: int fas216_command (Scsi_Cmnd *SCpnt)
338 * Purpose : queue a command for adapter to process.
339 * Params : SCpnt - Command to queue
340 * Returns : scsi result code
342 extern int fas216_command (Scsi_Cmnd *);
344 /* Function: void fas216_intr (struct Scsi_Host *instance)
345 * Purpose : handle interrupts from the interface to progress a command
346 * Params : instance - interface to service
348 extern void fas216_intr (struct Scsi_Host *instance);
350 /* Function: int fas216_release (struct Scsi_Host *instance)
351 * Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
352 * Params : instance - a driver-specific filled-out structure
353 * Returns : 0 on success
355 extern int fas216_release (struct Scsi_Host *instance);
357 extern int fas216_info(FAS216_Info *info, char *buffer);
358 extern int fas216_print_host(FAS216_Info *info, char *buffer);
359 extern int fas216_print_stats(FAS216_Info *info, char *buffer);
360 extern int fas216_print_device(FAS216_Info *info, Scsi_Device *scd, char *buffer);
362 /* Function: int fas216_eh_abort(Scsi_Cmnd *SCpnt)
363 * Purpose : abort this command
364 * Params : SCpnt - command to abort
365 * Returns : FAILED if unable to abort
367 extern int fas216_eh_abort(Scsi_Cmnd *SCpnt);
369 /* Function: int fas216_eh_device_reset(Scsi_Cmnd *SCpnt)
370 * Purpose : Reset the device associated with this command
371 * Params : SCpnt - command specifing device to reset
372 * Returns : FAILED if unable to reset
374 extern int fas216_eh_device_reset(Scsi_Cmnd *SCpnt);
376 /* Function: int fas216_eh_bus_reset(Scsi_Cmnd *SCpnt)
377 * Purpose : Reset the complete bus associated with this command
378 * Params : SCpnt - command specifing bus to reset
379 * Returns : FAILED if unable to reset
381 extern int fas216_eh_bus_reset(Scsi_Cmnd *SCpnt);
383 /* Function: int fas216_eh_host_reset(Scsi_Cmnd *SCpnt)
384 * Purpose : Reset the host associated with this command
385 * Params : SCpnt - command specifing host to reset
386 * Returns : FAILED if unable to reset
388 extern int fas216_eh_host_reset(Scsi_Cmnd *SCpnt);
390 #endif /* FAS216_H */