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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 | /* $Id: esp.h,v 1.29 2001/12/11 04:55:47 davem Exp $ * esp.h: Defines and structures for the Sparc ESP (Enhanced SCSI * Processor) driver under Linux. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) */ #ifndef _SPARC_ESP_H #define _SPARC_ESP_H /* For dvma controller register definitions. */ #include <asm/dma.h> /* The ESP SCSI controllers have their register sets in three * "classes": * * 1) Registers which are both read and write. * 2) Registers which are read only. * 3) Registers which are write only. * * Yet, they all live within the same IO space. */ /* All the ESP registers are one byte each and are accessed longwords * apart with a big-endian ordering to the bytes. */ /* Access Description Offset */ #define ESP_TCLOW 0x00UL /* rw Low bits of the transfer count 0x00 */ #define ESP_TCMED 0x04UL /* rw Mid bits of the transfer count 0x04 */ #define ESP_FDATA 0x08UL /* rw FIFO data bits 0x08 */ #define ESP_CMD 0x0cUL /* rw SCSI command bits 0x0c */ #define ESP_STATUS 0x10UL /* ro ESP status register 0x10 */ #define ESP_BUSID ESP_STATUS /* wo Bus ID for select/reselect 0x10 */ #define ESP_INTRPT 0x14UL /* ro Kind of interrupt 0x14 */ #define ESP_TIMEO ESP_INTRPT /* wo Timeout value for select/resel 0x14 */ #define ESP_SSTEP 0x18UL /* ro Sequence step register 0x18 */ #define ESP_STP ESP_SSTEP /* wo Transfer period per sync 0x18 */ #define ESP_FFLAGS 0x1cUL /* ro Bits of current FIFO info 0x1c */ #define ESP_SOFF ESP_FFLAGS /* wo Sync offset 0x1c */ #define ESP_CFG1 0x20UL /* rw First configuration register 0x20 */ #define ESP_CFACT 0x24UL /* wo Clock conversion factor 0x24 */ #define ESP_STATUS2 ESP_CFACT /* ro HME status2 register 0x24 */ #define ESP_CTEST 0x28UL /* wo Chip test register 0x28 */ #define ESP_CFG2 0x2cUL /* rw Second configuration register 0x2c */ #define ESP_CFG3 0x30UL /* rw Third configuration register 0x30 */ #define ESP_TCHI 0x38UL /* rw High bits of transfer count 0x38 */ #define ESP_UID ESP_TCHI /* ro Unique ID code 0x38 */ #define FAS_RLO ESP_TCHI /* rw HME extended counter 0x38 */ #define ESP_FGRND 0x3cUL /* rw Data base for fifo 0x3c */ #define FAS_RHI ESP_FGRND /* rw HME extended counter 0x3c */ #define ESP_REG_SIZE 0x40UL /* Various revisions of the ESP board. */ enum esp_rev { esp100 = 0x00, /* NCR53C90 - very broken */ esp100a = 0x01, /* NCR53C90A */ esp236 = 0x02, fas236 = 0x03, fas100a = 0x04, fast = 0x05, fashme = 0x06, espunknown = 0x07 }; /* We allocate one of these for each scsi device and attach it to * SDptr->hostdata for use in the driver */ struct esp_device { unsigned char sync_min_period; unsigned char sync_max_offset; unsigned sync:1; unsigned wide:1; unsigned disconnect:1; }; struct scsi_cmnd; /* We get one of these for each ESP probed. */ struct esp { void __iomem *eregs; /* ESP controller registers */ void __iomem *dregs; /* DMA controller registers */ struct sbus_dma *dma; /* DMA controller sw state */ struct Scsi_Host *ehost; /* Backpointer to SCSI Host */ struct sbus_dev *sdev; /* Pointer to SBus entry */ /* ESP Configuration Registers */ u8 config1; /* Copy of the 1st config register */ u8 config2; /* Copy of the 2nd config register */ u8 config3[16]; /* Copy of the 3rd config register */ /* The current command we are sending to the ESP chip. This esp_command * ptr needs to be mapped in DVMA area so we can send commands and read * from the ESP fifo without burning precious CPU cycles. Programmed I/O * sucks when we have the DVMA to do it for us. The ESP is stupid and will * only send out 6, 10, and 12 byte SCSI commands, others we need to send * one byte at a time. esp_slowcmd being set says that we are doing one * of the command types ESP doesn't understand, esp_scmdp keeps track of * which byte we are sending, esp_scmdleft says how many bytes to go. */ volatile u8 *esp_command; /* Location of command (CPU view) */ __u32 esp_command_dvma;/* Location of command (DVMA view) */ unsigned char esp_clen; /* Length of this command */ unsigned char esp_slowcmd; unsigned char *esp_scmdp; unsigned char esp_scmdleft; /* The following are used to determine the cause of an IRQ. Upon every * IRQ entry we synchronize these with the hardware registers. */ u8 ireg; /* Copy of ESP interrupt register */ u8 sreg; /* Copy of ESP status register */ u8 seqreg; /* Copy of ESP sequence step register */ u8 sreg2; /* Copy of HME status2 register */ /* To save register writes to the ESP, which can be expensive, we * keep track of the previous value that various registers had for * the last target we connected to. If they are the same for the * current target, we skip the register writes as they are not needed. */ u8 prev_soff, prev_stp; u8 prev_cfg3, __cache_pad; /* We also keep a cache of the previous FAS/HME DMA CSR register value. */ u32 prev_hme_dmacsr; /* The HME is the biggest piece of shit I have ever seen. */ u8 hme_fifo_workaround_buffer[16 * 2]; u8 hme_fifo_workaround_count; /* For each target we keep track of save/restore data * pointer information. This needs to be updated majorly * when we add support for tagged queueing. -DaveM */ struct esp_pointers { char *saved_ptr; struct scatterlist *saved_buffer; int saved_this_residual; int saved_buffers_residual; } data_pointers[16] /*XXX [MAX_TAGS_PER_TARGET]*/; /* Clock periods, frequencies, synchronization, etc. */ unsigned int cfreq; /* Clock frequency in HZ */ unsigned int cfact; /* Clock conversion factor */ unsigned int raw_cfact; /* Raw copy from probing */ unsigned int ccycle; /* One ESP clock cycle */ unsigned int ctick; /* One ESP clock time */ unsigned int radelay; /* FAST chip req/ack delay */ unsigned int neg_defp; /* Default negotiation period */ unsigned int sync_defp; /* Default sync transfer period */ unsigned int max_period; /* longest our period can be */ unsigned int min_period; /* shortest period we can withstand */ struct esp *next; /* Next ESP we probed or NULL */ char prom_name[64]; /* Name of ESP device from prom */ int prom_node; /* Prom node where ESP found */ int esp_id; /* Unique per-ESP ID number */ /* For slow to medium speed input clock rates we shoot for 5mb/s, * but for high input clock rates we try to do 10mb/s although I * don't think a transfer can even run that fast with an ESP even * with DMA2 scatter gather pipelining. */ #define SYNC_DEFP_SLOW 0x32 /* 5mb/s */ #define SYNC_DEFP_FAST 0x19 /* 10mb/s */ unsigned int snip; /* Sync. negotiation in progress */ unsigned int wnip; /* WIDE negotiation in progress */ unsigned int targets_present;/* targets spoken to before */ int current_transfer_size; /* Set at beginning of data dma */ u8 espcmdlog[32]; /* Log of current esp cmds sent. */ u8 espcmdent; /* Current entry in esp cmd log. */ /* Misc. info about this ESP */ enum esp_rev erev; /* ESP revision */ int irq; /* SBus IRQ for this ESP */ int scsi_id; /* Who am I as initiator? */ int scsi_id_mask; /* Bitmask of 'me'. */ int diff; /* Differential SCSI bus? */ int bursts; /* Burst sizes our DVMA supports */ /* Our command queues, only one cmd lives in the current_SC queue. */ struct scsi_cmnd *issue_SC; /* Commands to be issued */ struct scsi_cmnd *current_SC; /* Who is currently working the bus */ struct scsi_cmnd *disconnected_SC;/* Commands disconnected from the bus */ /* Message goo */ u8 cur_msgout[16]; u8 cur_msgin[16]; u8 prevmsgout, prevmsgin; u8 msgout_len, msgin_len; u8 msgout_ctr, msgin_ctr; /* States that we cannot keep in the per cmd structure because they * cannot be assosciated with any specific command. */ u8 resetting_bus; wait_queue_head_t reset_queue; }; /* Bitfield meanings for the above registers. */ /* ESP config reg 1, read-write, found on all ESP chips */ #define ESP_CONFIG1_ID 0x07 /* My BUS ID bits */ #define ESP_CONFIG1_CHTEST 0x08 /* Enable ESP chip tests */ #define ESP_CONFIG1_PENABLE 0x10 /* Enable parity checks */ #define ESP_CONFIG1_PARTEST 0x20 /* Parity test mode enabled? */ #define ESP_CONFIG1_SRRDISAB 0x40 /* Disable SCSI reset reports */ #define ESP_CONFIG1_SLCABLE 0x80 /* Enable slow cable mode */ /* ESP config reg 2, read-write, found only on esp100a+esp200+esp236 chips */ #define ESP_CONFIG2_DMAPARITY 0x01 /* enable DMA Parity (200,236) */ #define ESP_CONFIG2_REGPARITY 0x02 /* enable reg Parity (200,236) */ #define ESP_CONFIG2_BADPARITY 0x04 /* Bad parity target abort */ #define ESP_CONFIG2_SCSI2ENAB 0x08 /* Enable SCSI-2 features (tmode only) */ #define ESP_CONFIG2_HI 0x10 /* High Impedance DREQ ??? */ #define ESP_CONFIG2_HMEFENAB 0x10 /* HME features enable */ #define ESP_CONFIG2_BCM 0x20 /* Enable byte-ctrl (236) */ #define ESP_CONFIG2_DISPINT 0x20 /* Disable pause irq (hme) */ #define ESP_CONFIG2_FENAB 0x40 /* Enable features (fas100,esp216) */ #define ESP_CONFIG2_SPL 0x40 /* Enable status-phase latch (esp236) */ #define ESP_CONFIG2_MKDONE 0x40 /* HME magic feature */ #define ESP_CONFIG2_HME32 0x80 /* HME 32 extended */ #define ESP_CONFIG2_MAGIC 0xe0 /* Invalid bits... */ /* ESP config register 3 read-write, found only esp236+fas236+fas100a+hme chips */ #define ESP_CONFIG3_FCLOCK 0x01 /* FAST SCSI clock rate (esp100a/hme) */ #define ESP_CONFIG3_TEM 0x01 /* Enable thresh-8 mode (esp/fas236) */ #define ESP_CONFIG3_FAST 0x02 /* Enable FAST SCSI (esp100a/hme) */ #define ESP_CONFIG3_ADMA 0x02 /* Enable alternate-dma (esp/fas236) */ #define ESP_CONFIG3_TENB 0x04 /* group2 SCSI2 support (esp100a/hme) */ #define ESP_CONFIG3_SRB 0x04 /* Save residual byte (esp/fas236) */ #define ESP_CONFIG3_TMS 0x08 /* Three-byte msg's ok (esp100a/hme) */ #define ESP_CONFIG3_FCLK 0x08 /* Fast SCSI clock rate (esp/fas236) */ #define ESP_CONFIG3_IDMSG 0x10 /* ID message checking (esp100a/hme) */ #define ESP_CONFIG3_FSCSI 0x10 /* Enable FAST SCSI (esp/fas236) */ #define ESP_CONFIG3_GTM 0x20 /* group2 SCSI2 support (esp/fas236) */ #define ESP_CONFIG3_IDBIT3 0x20 /* Bit 3 of HME SCSI-ID (hme) */ #define ESP_CONFIG3_TBMS 0x40 /* Three-byte msg's ok (esp/fas236) */ #define ESP_CONFIG3_EWIDE 0x40 /* Enable Wide-SCSI (hme) */ #define ESP_CONFIG3_IMS 0x80 /* ID msg chk'ng (esp/fas236) */ #define ESP_CONFIG3_OBPUSH 0x80 /* Push odd-byte to dma (hme) */ /* ESP command register read-write */ /* Group 1 commands: These may be sent at any point in time to the ESP * chip. None of them can generate interrupts 'cept * the "SCSI bus reset" command if you have not disabled * SCSI reset interrupts in the config1 ESP register. */ #define ESP_CMD_NULL 0x00 /* Null command, ie. a nop */ #define ESP_CMD_FLUSH 0x01 /* FIFO Flush */ #define ESP_CMD_RC 0x02 /* Chip reset */ #define ESP_CMD_RS 0x03 /* SCSI bus reset */ /* Group 2 commands: ESP must be an initiator and connected to a target * for these commands to work. */ #define ESP_CMD_TI 0x10 /* Transfer Information */ #define ESP_CMD_ICCSEQ 0x11 /* Initiator cmd complete sequence */ #define ESP_CMD_MOK 0x12 /* Message okie-dokie */ #define ESP_CMD_TPAD 0x18 /* Transfer Pad */ #define ESP_CMD_SATN 0x1a /* Set ATN */ #define ESP_CMD_RATN 0x1b /* De-assert ATN */ /* Group 3 commands: ESP must be in the MSGOUT or MSGIN state and be connected * to a target as the initiator for these commands to work. */ #define ESP_CMD_SMSG 0x20 /* Send message */ #define ESP_CMD_SSTAT 0x21 /* Send status */ #define ESP_CMD_SDATA 0x22 /* Send data */ #define ESP_CMD_DSEQ 0x23 /* Discontinue Sequence */ #define ESP_CMD_TSEQ 0x24 /* Terminate Sequence */ #define ESP_CMD_TCCSEQ 0x25 /* Target cmd cmplt sequence */ #define ESP_CMD_DCNCT 0x27 /* Disconnect */ #define ESP_CMD_RMSG 0x28 /* Receive Message */ #define ESP_CMD_RCMD 0x29 /* Receive Command */ #define ESP_CMD_RDATA 0x2a /* Receive Data */ #define ESP_CMD_RCSEQ 0x2b /* Receive cmd sequence */ /* Group 4 commands: The ESP must be in the disconnected state and must * not be connected to any targets as initiator for * these commands to work. */ #define ESP_CMD_RSEL 0x40 /* Reselect */ #define ESP_CMD_SEL 0x41 /* Select w/o ATN */ #define ESP_CMD_SELA 0x42 /* Select w/ATN */ #define ESP_CMD_SELAS 0x43 /* Select w/ATN & STOP */ #define ESP_CMD_ESEL 0x44 /* Enable selection */ #define ESP_CMD_DSEL 0x45 /* Disable selections */ #define ESP_CMD_SA3 0x46 /* Select w/ATN3 */ #define ESP_CMD_RSEL3 0x47 /* Reselect3 */ /* This bit enables the ESP's DMA on the SBus */ #define ESP_CMD_DMA 0x80 /* Do DMA? */ /* ESP status register read-only */ #define ESP_STAT_PIO 0x01 /* IO phase bit */ #define ESP_STAT_PCD 0x02 /* CD phase bit */ #define ESP_STAT_PMSG 0x04 /* MSG phase bit */ #define ESP_STAT_PMASK 0x07 /* Mask of phase bits */ #define ESP_STAT_TDONE 0x08 /* Transfer Completed */ #define ESP_STAT_TCNT 0x10 /* Transfer Counter Is Zero */ #define ESP_STAT_PERR 0x20 /* Parity error */ #define ESP_STAT_SPAM 0x40 /* Real bad error */ /* This indicates the 'interrupt pending' condition on esp236, it is a reserved * bit on other revs of the ESP. */ #define ESP_STAT_INTR 0x80 /* Interrupt */ /* HME only: status 2 register */ #define ESP_STAT2_SCHBIT 0x01 /* Upper bits 3-7 of sstep enabled */ #define ESP_STAT2_FFLAGS 0x02 /* The fifo flags are now latched */ #define ESP_STAT2_XCNT 0x04 /* The transfer counter is latched */ #define ESP_STAT2_CREGA 0x08 /* The command reg is active now */ #define ESP_STAT2_WIDE 0x10 /* Interface on this adapter is wide */ #define ESP_STAT2_F1BYTE 0x20 /* There is one byte at top of fifo */ #define ESP_STAT2_FMSB 0x40 /* Next byte in fifo is most significant */ #define ESP_STAT2_FEMPTY 0x80 /* FIFO is empty */ /* The status register can be masked with ESP_STAT_PMASK and compared * with the following values to determine the current phase the ESP * (at least thinks it) is in. For our purposes we also add our own * software 'done' bit for our phase management engine. */ #define ESP_DOP (0) /* Data Out */ #define ESP_DIP (ESP_STAT_PIO) /* Data In */ #define ESP_CMDP (ESP_STAT_PCD) /* Command */ #define ESP_STATP (ESP_STAT_PCD|ESP_STAT_PIO) /* Status */ #define ESP_MOP (ESP_STAT_PMSG|ESP_STAT_PCD) /* Message Out */ #define ESP_MIP (ESP_STAT_PMSG|ESP_STAT_PCD|ESP_STAT_PIO) /* Message In */ /* ESP interrupt register read-only */ #define ESP_INTR_S 0x01 /* Select w/o ATN */ #define ESP_INTR_SATN 0x02 /* Select w/ATN */ #define ESP_INTR_RSEL 0x04 /* Reselected */ #define ESP_INTR_FDONE 0x08 /* Function done */ #define ESP_INTR_BSERV 0x10 /* Bus service */ #define ESP_INTR_DC 0x20 /* Disconnect */ #define ESP_INTR_IC 0x40 /* Illegal command given */ #define ESP_INTR_SR 0x80 /* SCSI bus reset detected */ /* Interrupt status macros */ #define ESP_SRESET_IRQ(esp) ((esp)->intreg & (ESP_INTR_SR)) #define ESP_ILLCMD_IRQ(esp) ((esp)->intreg & (ESP_INTR_IC)) #define ESP_SELECT_WITH_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_SATN)) #define ESP_SELECT_WITHOUT_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_S)) #define ESP_SELECTION_IRQ(esp) ((ESP_SELECT_WITH_ATN_IRQ(esp)) || \ (ESP_SELECT_WITHOUT_ATN_IRQ(esp))) #define ESP_RESELECTION_IRQ(esp) ((esp)->intreg & (ESP_INTR_RSEL)) /* ESP sequence step register read-only */ #define ESP_STEP_VBITS 0x07 /* Valid bits */ #define ESP_STEP_ASEL 0x00 /* Selection&Arbitrate cmplt */ #define ESP_STEP_SID 0x01 /* One msg byte sent */ #define ESP_STEP_NCMD 0x02 /* Was not in command phase */ #define ESP_STEP_PPC 0x03 /* Early phase chg caused cmnd * bytes to be lost */ #define ESP_STEP_FINI4 0x04 /* Command was sent ok */ /* Ho hum, some ESP's set the step register to this as well... */ #define ESP_STEP_FINI5 0x05 #define ESP_STEP_FINI6 0x06 #define ESP_STEP_FINI7 0x07 /* ESP chip-test register read-write */ #define ESP_TEST_TARG 0x01 /* Target test mode */ #define ESP_TEST_INI 0x02 /* Initiator test mode */ #define ESP_TEST_TS 0x04 /* Tristate test mode */ /* ESP unique ID register read-only, found on fas236+fas100a only */ #define ESP_UID_F100A 0x00 /* ESP FAS100A */ #define ESP_UID_F236 0x02 /* ESP FAS236 */ #define ESP_UID_REV 0x07 /* ESP revision */ #define ESP_UID_FAM 0xf8 /* ESP family */ /* ESP fifo flags register read-only */ /* Note that the following implies a 16 byte FIFO on the ESP. */ #define ESP_FF_FBYTES 0x1f /* Num bytes in FIFO */ #define ESP_FF_ONOTZERO 0x20 /* offset ctr not zero (esp100) */ #define ESP_FF_SSTEP 0xe0 /* Sequence step */ /* ESP clock conversion factor register write-only */ #define ESP_CCF_F0 0x00 /* 35.01MHz - 40MHz */ #define ESP_CCF_NEVER 0x01 /* Set it to this and die */ #define ESP_CCF_F2 0x02 /* 10MHz */ #define ESP_CCF_F3 0x03 /* 10.01MHz - 15MHz */ #define ESP_CCF_F4 0x04 /* 15.01MHz - 20MHz */ #define ESP_CCF_F5 0x05 /* 20.01MHz - 25MHz */ #define ESP_CCF_F6 0x06 /* 25.01MHz - 30MHz */ #define ESP_CCF_F7 0x07 /* 30.01MHz - 35MHz */ /* HME only... */ #define ESP_BUSID_RESELID 0x10 #define ESP_BUSID_CTR32BIT 0x40 #define ESP_BUS_TIMEOUT 275 /* In milli-seconds */ #define ESP_TIMEO_CONST 8192 #define ESP_NEG_DEFP(mhz, cfact) \ ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact))) #define ESP_MHZ_TO_CYCLE(mhertz) ((1000000000) / ((mhertz) / 1000)) #define ESP_TICK(ccf, cycle) ((7682 * (ccf) * (cycle) / 1000)) #endif /* !(_SPARC_ESP_H) */ |