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 */ 394