/* * mac53c94.h: definitions for the driver for the 53c94 SCSI bus adaptor * found on Power Macintosh computers, controlling the external SCSI chain. * * Copyright (C) 1996 Paul Mackerras. */ #ifndef _MAC53C94_H #define _MAC53C94_H /* * Registers in the 53C94 controller. */ struct mac53c94_regs { unsigned char count_lo; char pad0[15]; unsigned char count_mid; char pad1[15]; unsigned char fifo; char pad2[15]; unsigned char command; char pad3[15]; unsigned char status; char pad4[15]; unsigned char interrupt; char pad5[15]; unsigned char seqstep; char pad6[15]; unsigned char flags; char pad7[15]; unsigned char config1; char pad8[15]; unsigned char clk_factor; char pad9[15]; unsigned char test; char pad10[15]; unsigned char config2; char pad11[15]; unsigned char config3; char pad12[15]; unsigned char config4; char pad13[15]; unsigned char count_hi; char pad14[15]; unsigned char fifo_res; char pad15[15]; }; /* * Alternate functions for some registers. */ #define dest_id status #define sel_timeout interrupt #define sync_period seqstep #define sync_offset flags /* * Bits in command register. */ #define CMD_DMA_MODE 0x80 #define CMD_MODE_MASK 0x70 #define CMD_MODE_INIT 0x10 #define CMD_MODE_TARG 0x20 #define CMD_MODE_DISC 0x40 #define CMD_NOP 0 #define CMD_FLUSH 1 #define CMD_RESET 2 #define CMD_SCSI_RESET 3 #define CMD_XFER_DATA 0x10 #define CMD_I_COMPLETE 0x11 #define CMD_ACCEPT_MSG 0x12 #define CMD_XFER_PAD 0x18 #define CMD_SET_ATN 0x1a #define CMD_CLR_ATN 0x1b #define CMD_SEND_MSG 0x20 #define CMD_SEND_STATUS 0x21 #define CMD_SEND_DATA 0x22 #define CMD_DISC_SEQ 0x23 #define CMD_TERMINATE 0x24 #define CMD_T_COMPLETE 0x25 #define CMD_DISCONNECT 0x27 #define CMD_RECV_MSG 0x28 #define CMD_RECV_CDB 0x29 #define CMD_RECV_DATA 0x2a #define CMD_RECV_CMD 0x2b #define CMD_ABORT_DMA 0x04 #define CMD_RESELECT 0x40 #define CMD_SELECT 0x41 #define CMD_SELECT_ATN 0x42 #define CMD_SELATN_STOP 0x43 #define CMD_ENABLE_SEL 0x44 #define CMD_DISABLE_SEL 0x45 #define CMD_SEL_ATN3 0x46 #define CMD_RESEL_ATN3 0x47 /* * Bits in status register. */ #define STAT_IRQ 0x80 #define STAT_ERROR 0x40 #define STAT_PARITY 0x20 #define STAT_TC_ZERO 0x10 #define STAT_DONE 0x08 #define STAT_PHASE 0x07 #define STAT_MSG 0x04 #define STAT_CD 0x02 #define STAT_IO 0x01 /* * Bits in interrupt register. */ #define INTR_RESET 0x80 /* SCSI bus was reset */ #define INTR_ILL_CMD 0x40 /* illegal command */ #define INTR_DISCONNECT 0x20 /* we got disconnected */ #define INTR_BUS_SERV 0x10 /* bus service requested */ #define INTR_DONE 0x08 /* function completed */ #define INTR_RESELECTED 0x04 /* we were reselected */ #define INTR_SEL_ATN 0x02 /* we were selected, ATN asserted */ #define INTR_SELECT 0x01 /* we were selected, ATN negated */ /* * Encoding for the select timeout. */ #define TIMO_VAL(x) ((x) * 5000 / 7682) /* * Bits in sequence step register. */ #define SS_MASK 7 #define SS_ARB_SEL 0 /* Selection & arbitration complete */ #define SS_MSG_SENT 1 /* One message byte sent */ #define SS_NOT_CMD 2 /* Not in command phase */ #define SS_PHASE_CHG 3 /* Early phase change, cmd bytes lost */ #define SS_DONE 4 /* Command was sent OK */ /* * Encoding for sync transfer period. */ #define SYNCP_MASK 0x1f #define SYNCP_MIN 4 #define SYNCP_MAX 31 /* * Bits in flags register. */ #define FLAGS_FIFO_LEV 0x1f #define FLAGS_SEQ_STEP 0xe0 /* * Encoding for sync offset. */ #define SYNCO_MASK 0x0f #define SYNCO_ASS_CTRL 0x30 /* REQ/ACK assertion control */ #define SYNCO_NEG_CTRL 0xc0 /* REQ/ACK negation control */ /* * Bits in config1 register. */ #define CF1_SLOW_CABLE 0x80 /* Slow cable mode */ #define CF1_NO_RES_REP 0x40 /* Disable SCSI reset reports */ #define CF1_PAR_TEST 0x20 /* Parity test mode enable */ #define CF1_PAR_ENABLE 0x10 /* Enable parity checks */ #define CF1_TEST 0x08 /* Chip tests */ #define CF1_MY_ID 0x07 /* Controller's address on bus */ /* * Encoding for clk_factor register. */ #define CLKF_MASK 7 #define CLKF_VAL(freq) ((((freq) + 4999999) / 5000000) & CLKF_MASK) /* * Bits in test mode register. */ #define TEST_TARGET 1 /* target test mode */ #define TEST_INITIATOR 2 /* initiator test mode */ #define TEST_TRISTATE 4 /* tristate (hi-z) test mode */ /* * Bits in config2 register. */ #define CF2_RFB 0x80 #define CF2_FEATURE_EN 0x40 /* enable features / phase latch */ #define CF2_BYTECTRL 0x20 #define CF2_DREQ_HIZ 0x10 #define CF2_SCSI2 0x08 #define CF2_PAR_ABORT 0x04 /* bad parity target abort */ #define CF2_REG_PARERR 0x02 /* register parity error */ #define CF2_DMA_PARERR 0x01 /* DMA parity error */ /* * Bits in the config3 register. */ #define CF3_ID_MSG_CHK 0x80 #define CF3_3B_MSGS 0x40 #define CF3_CDB10 0x20 #define CF3_FASTSCSI 0x10 /* enable fast SCSI support */ #define CF3_FASTCLOCK 0x08 #define CF3_SAVERESID 0x04 #define CF3_ALT_DMA 0x02 #define CF3_THRESH_8 0x01 /* * Bits in the config4 register. */ #define CF4_EAN 0x04 #define CF4_TEST 0x02 #define CF4_BBTE 0x01 #endif /* _MAC53C94_H */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 630 | 100.00% | 1 | 100.00% |
| Total | 630 | 100.00% | 1 | 100.00% |