mirror of
https://github.com/torvalds/linux.git
synced 2024-11-26 22:21:42 +00:00
55a94551f6
This driver doesn't use SCp.ptr to save a SCSI command data pointer which
means "scsi pointer" is a complete misnomer here. Only a few members of
struct scsi_pointer are used and the rest waste memory. Avoid the "struct
foo { struct bar; };" silliness.
Link: https://lore.kernel.org/r/3529a59873a7de8455a27af2528341afe5069adc.1645484982.git.fthain@linux-m68k.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
227 lines
5.1 KiB
C
227 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* 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
|
|
|
|
struct mac53c94_cmd_priv {
|
|
int this_residual;
|
|
int status;
|
|
int message;
|
|
};
|
|
|
|
static inline struct mac53c94_cmd_priv *mac53c94_priv(struct scsi_cmnd *cmd)
|
|
{
|
|
return scsi_cmd_priv(cmd);
|
|
}
|
|
|
|
#endif /* _MAC53C94_H */
|