1 /* 2 * linux/drivers/acorn/scsi/acornscsi.h 3 * 4 * Copyright (C) 1997 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 * Acorn SCSI driver 11 */ 12 #ifndef ACORNSCSI_H 13 #define ACORNSCSI_H 14 15 /* SBIC registers */ 16 #define SBIC_OWNID 0 17 #define OWNID_FS1 (1<<7) 18 #define OWNID_FS2 (1<<6) 19 #define OWNID_EHP (1<<4) 20 #define OWNID_EAF (1<<3) 21 22 #define SBIC_CTRL 1 23 #define CTRL_DMAMODE (1<<7) 24 #define CTRL_DMADBAMODE (1<<6) 25 #define CTRL_DMABURST (1<<5) 26 #define CTRL_DMAPOLLED 0 27 #define CTRL_HHP (1<<4) 28 #define CTRL_EDI (1<<3) 29 #define CTRL_IDI (1<<2) 30 #define CTRL_HA (1<<1) 31 #define CTRL_HSP (1<<0) 32 33 #define SBIC_TIMEOUT 2 34 #define SBIC_TOTSECTS 3 35 #define SBIC_TOTHEADS 4 36 #define SBIC_TOTCYLH 5 37 #define SBIC_TOTCYLL 6 38 #define SBIC_LOGADDRH 7 39 #define SBIC_LOGADDRM2 8 40 #define SBIC_LOGADDRM1 9 41 #define SBIC_LOGADDRL 10 42 #define SBIC_SECTORNUM 11 43 #define SBIC_HEADNUM 12 44 #define SBIC_CYLH 13 45 #define SBIC_CYLL 14 46 #define SBIC_TARGETLUN 15 47 #define TARGETLUN_TLV (1<<7) 48 #define TARGETLUN_DOK (1<<6) 49 50 #define SBIC_CMNDPHASE 16 51 #define SBIC_SYNCHTRANSFER 17 52 #define SYNCHTRANSFER_OF0 0x00 53 #define SYNCHTRANSFER_OF1 0x01 54 #define SYNCHTRANSFER_OF2 0x02 55 #define SYNCHTRANSFER_OF3 0x03 56 #define SYNCHTRANSFER_OF4 0x04 57 #define SYNCHTRANSFER_OF5 0x05 58 #define SYNCHTRANSFER_OF6 0x06 59 #define SYNCHTRANSFER_OF7 0x07 60 #define SYNCHTRANSFER_OF8 0x08 61 #define SYNCHTRANSFER_OF9 0x09 62 #define SYNCHTRANSFER_OF10 0x0A 63 #define SYNCHTRANSFER_OF11 0x0B 64 #define SYNCHTRANSFER_OF12 0x0C 65 #define SYNCHTRANSFER_8DBA 0x00 66 #define SYNCHTRANSFER_2DBA 0x20 67 #define SYNCHTRANSFER_3DBA 0x30 68 #define SYNCHTRANSFER_4DBA 0x40 69 #define SYNCHTRANSFER_5DBA 0x50 70 #define SYNCHTRANSFER_6DBA 0x60 71 #define SYNCHTRANSFER_7DBA 0x70 72 73 #define SBIC_TRANSCNTH 18 74 #define SBIC_TRANSCNTM 19 75 #define SBIC_TRANSCNTL 20 76 #define SBIC_DESTID 21 77 #define DESTID_SCC (1<<7) 78 #define DESTID_DPD (1<<6) 79 80 #define SBIC_SOURCEID 22 81 #define SOURCEID_ER (1<<7) 82 #define SOURCEID_ES (1<<6) 83 #define SOURCEID_DSP (1<<5) 84 #define SOURCEID_SIV (1<<4) 85 86 #define SBIC_SSR 23 87 #define SBIC_CMND 24 88 #define CMND_RESET 0x00 89 #define CMND_ABORT 0x01 90 #define CMND_ASSERTATN 0x02 91 #define CMND_NEGATEACK 0x03 92 #define CMND_DISCONNECT 0x04 93 #define CMND_RESELECT 0x05 94 #define CMND_SELWITHATN 0x06 95 #define CMND_SELECT 0x07 96 #define CMND_SELECTATNTRANSFER 0x08 97 #define CMND_SELECTTRANSFER 0x09 98 #define CMND_RESELECTRXDATA 0x0A 99 #define CMND_RESELECTTXDATA 0x0B 100 #define CMND_WAITFORSELRECV 0x0C 101 #define CMND_SENDSTATCMD 0x0D 102 #define CMND_SENDDISCONNECT 0x0E 103 #define CMND_SETIDI 0x0F 104 #define CMND_RECEIVECMD 0x10 105 #define CMND_RECEIVEDTA 0x11 106 #define CMND_RECEIVEMSG 0x12 107 #define CMND_RECEIVEUSP 0x13 108 #define CMND_SENDCMD 0x14 109 #define CMND_SENDDATA 0x15 110 #define CMND_SENDMSG 0x16 111 #define CMND_SENDUSP 0x17 112 #define CMND_TRANSLATEADDR 0x18 113 #define CMND_XFERINFO 0x20 114 #define CMND_SBT (1<<7) 115 116 #define SBIC_DATA 25 117 #define SBIC_ASR 26 118 #define ASR_INT (1<<7) 119 #define ASR_LCI (1<<6) 120 #define ASR_BSY (1<<5) 121 #define ASR_CIP (1<<4) 122 #define ASR_PE (1<<1) 123 #define ASR_DBR (1<<0) 124 125 /* DMAC registers */ 126 #define DMAC_INIT 0x00 127 #define INIT_8BIT (1) 128 129 #define DMAC_CHANNEL 0x80 130 #define CHANNEL_0 0x00 131 #define CHANNEL_1 0x01 132 #define CHANNEL_2 0x02 133 #define CHANNEL_3 0x03 134 135 #define DMAC_TXCNTLO 0x01 136 #define DMAC_TXCNTHI 0x81 137 #define DMAC_TXADRLO 0x02 138 #define DMAC_TXADRMD 0x82 139 #define DMAC_TXADRHI 0x03 140 141 #define DMAC_DEVCON0 0x04 142 #define DEVCON0_AKL (1<<7) 143 #define DEVCON0_RQL (1<<6) 144 #define DEVCON0_EXW (1<<5) 145 #define DEVCON0_ROT (1<<4) 146 #define DEVCON0_CMP (1<<3) 147 #define DEVCON0_DDMA (1<<2) 148 #define DEVCON0_AHLD (1<<1) 149 #define DEVCON0_MTM (1<<0) 150 151 #define DMAC_DEVCON1 0x84 152 #define DEVCON1_WEV (1<<1) 153 #define DEVCON1_BHLD (1<<0) 154 155 #define DMAC_MODECON 0x05 156 #define MODECON_WOED 0x01 157 #define MODECON_VERIFY 0x00 158 #define MODECON_READ 0x04 159 #define MODECON_WRITE 0x08 160 #define MODECON_AUTOINIT 0x10 161 #define MODECON_ADDRDIR 0x20 162 #define MODECON_DEMAND 0x00 163 #define MODECON_SINGLE 0x40 164 #define MODECON_BLOCK 0x80 165 #define MODECON_CASCADE 0xC0 166 167 #define DMAC_STATUS 0x85 168 #define STATUS_TC0 (1<<0) 169 #define STATUS_RQ0 (1<<4) 170 171 #define DMAC_TEMPLO 0x06 172 #define DMAC_TEMPHI 0x86 173 #define DMAC_REQREG 0x07 174 #define DMAC_MASKREG 0x87 175 #define MASKREG_M0 0x01 176 #define MASKREG_M1 0x02 177 #define MASKREG_M2 0x04 178 #define MASKREG_M3 0x08 179 180 /* miscellaneous internal variables */ 181 182 #define MASK_ON (MASKREG_M3|MASKREG_M2|MASKREG_M1|MASKREG_M0) 183 #define MASK_OFF (MASKREG_M3|MASKREG_M2|MASKREG_M1) 184 185 /* 186 * SCSI driver phases 187 */ 188 typedef enum { 189 PHASE_IDLE, /* we're not planning on doing anything */ 190 PHASE_CONNECTING, /* connecting to a target */ 191 PHASE_CONNECTED, /* connected to a target */ 192 PHASE_MSGOUT, /* message out to device */ 193 PHASE_RECONNECTED, /* reconnected */ 194 PHASE_COMMANDPAUSED, /* command partly sent */ 195 PHASE_COMMAND, /* command all sent */ 196 PHASE_DATAOUT, /* data out to device */ 197 PHASE_DATAIN, /* data in from device */ 198 PHASE_STATUSIN, /* status in from device */ 199 PHASE_MSGIN, /* message in from device */ 200 PHASE_DONE, /* finished */ 201 PHASE_ABORTED, /* aborted */ 202 PHASE_DISCONNECT, /* disconnecting */ 203 } phase_t; 204 205 /* 206 * After interrupt, what to do now 207 */ 208 typedef enum { 209 INTR_IDLE, /* not expecting another IRQ */ 210 INTR_NEXT_COMMAND, /* start next command */ 211 INTR_PROCESSING, /* interrupt routine still processing */ 212 } intr_ret_t; 213 214 /* 215 * DMA direction 216 */ 217 typedef enum { 218 DMA_OUT, /* DMA from memory to chip */ 219 DMA_IN /* DMA from chip to memory */ 220 } dmadir_t; 221 222 /* 223 * Synchronous transfer state 224 */ 225 typedef enum { /* Synchronous transfer state */ 226 SYNC_ASYNCHRONOUS, /* don't negociate synchronous transfers*/ 227 SYNC_NEGOCIATE, /* start negociation */ 228 SYNC_SENT_REQUEST, /* sent SDTR message */ 229 SYNC_COMPLETED, /* received SDTR reply */ 230 } syncxfer_t; 231 232 /* 233 * Command type 234 */ 235 typedef enum { /* command type */ 236 CMD_READ, /* READ_6, READ_10, READ_12 */ 237 CMD_WRITE, /* WRITE_6, WRITE_10, WRITE_12 */ 238 CMD_MISC, /* Others */ 239 } cmdtype_t; 240 241 /* 242 * Data phase direction 243 */ 244 typedef enum { /* Data direction */ 245 DATADIR_IN, /* Data in phase expected */ 246 DATADIR_OUT /* Data out phase expected */ 247 } datadir_t; 248 249 #include "queue.h" 250 #include "msgqueue.h" 251 252 #define STATUS_BUFFER_SIZE 32 253 /* 254 * This is used to dump the previous states of the SBIC 255 */ 256 struct status_entry { 257 unsigned long when; 258 unsigned char ssr; 259 unsigned char ph; 260 unsigned char irq; 261 unsigned char unused; 262 }; 263 264 #define ADD_STATUS(_q,_ssr,_ph,_irq) \ 265 ({ \ 266 host->status[(_q)][host->status_ptr[(_q)]].when = jiffies; \ 267 host->status[(_q)][host->status_ptr[(_q)]].ssr = (_ssr); \ 268 host->status[(_q)][host->status_ptr[(_q)]].ph = (_ph); \ 269 host->status[(_q)][host->status_ptr[(_q)]].irq = (_irq); \ 270 host->status_ptr[(_q)] = (host->status_ptr[(_q)] + 1) & (STATUS_BUFFER_SIZE - 1); \ 271 }) 272 273 /* 274 * AcornSCSI host specific data 275 */ 276 typedef struct acornscsi_hostdata { 277 /* miscellaneous */ 278 struct Scsi_Host *host; /* host */ 279 struct scsi_cmnd *SCpnt; /* currently processing command */ 280 struct scsi_cmnd *origSCpnt; /* original connecting command */ 281 void __iomem *base; /* memc base address */ 282 void __iomem *fast; /* fast ioc base address */ 283 284 /* driver information */ 285 struct { 286 unsigned int irq; /* interrupt */ 287 phase_t phase; /* current phase */ 288 289 struct { 290 unsigned char target; /* reconnected target */ 291 unsigned char lun; /* reconnected lun */ 292 unsigned char tag; /* reconnected tag */ 293 } reconnected; 294 295 struct scsi_pointer SCp; /* current commands data pointer */ 296 297 MsgQueue_t msgs; 298 299 unsigned short last_message; /* last message to be sent */ 300 unsigned char disconnectable:1; /* this command can be disconnected */ 301 } scsi; 302 303 /* statistics information */ 304 struct { 305 unsigned int queues; 306 unsigned int removes; 307 unsigned int fins; 308 unsigned int reads; 309 unsigned int writes; 310 unsigned int miscs; 311 unsigned int disconnects; 312 unsigned int aborts; 313 unsigned int resets; 314 } stats; 315 316 /* queue handling */ 317 struct { 318 Queue_t issue; /* issue queue */ 319 Queue_t disconnected; /* disconnected command queue */ 320 } queues; 321 322 /* per-device info */ 323 struct { 324 unsigned char sync_xfer; /* synchronous transfer (SBIC value) */ 325 syncxfer_t sync_state; /* sync xfer negociation state */ 326 unsigned char disconnect_ok:1; /* device can disconnect */ 327 } device[8]; 328 unsigned long busyluns[64 / sizeof(unsigned long)];/* array of bits indicating LUNs busy */ 329 330 /* DMA info */ 331 struct { 332 unsigned int free_addr; /* next free address */ 333 unsigned int start_addr; /* start address of current transfer */ 334 dmadir_t direction; /* dma direction */ 335 unsigned int transferred; /* number of bytes transferred */ 336 unsigned int xfer_start; /* scheduled DMA transfer start */ 337 unsigned int xfer_length; /* scheduled DMA transfer length */ 338 char *xfer_ptr; /* pointer to area */ 339 unsigned char xfer_required:1; /* set if we need to transfer something */ 340 unsigned char xfer_setup:1; /* set if DMA is setup */ 341 unsigned char xfer_done:1; /* set if DMA reached end of BH list */ 342 } dma; 343 344 /* card info */ 345 struct { 346 unsigned char page_reg; /* current setting of page reg */ 347 } card; 348 349 unsigned char status_ptr[9]; 350 struct status_entry status[9][STATUS_BUFFER_SIZE]; 351 } AS_Host; 352 353 #endif /* ACORNSCSI_H */ 354