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   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 */