mac53c94.h
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上传日期:2013-04-10
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- /*
- * 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
- int mac53c94_detect(Scsi_Host_Template *);
- int mac53c94_release(struct Scsi_Host *);
- int mac53c94_command(Scsi_Cmnd *);
- int mac53c94_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
- int mac53c94_abort(Scsi_Cmnd *);
- int mac53c94_reset(Scsi_Cmnd *, unsigned int);
- #define SCSI_MAC53C94 {
- proc_name: "53c94",
- name: "53C94",
- detect: mac53c94_detect,
- release: mac53c94_release,
- command: mac53c94_command,
- queuecommand: mac53c94_queue,
- abort: mac53c94_abort,
- reset: mac53c94_reset,
- can_queue: 1,
- this_id: 7,
- sg_tablesize: SG_ALL,
- cmd_per_lun: 1,
- use_clustering: DISABLE_CLUSTERING,
- use_new_eh_code: 1,
- }
- /*
- * 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 */