drivers/scsi/aha1542.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _AHA1542_H_
0003 #define _AHA1542_H_
0004
0005 #include <linux/types.h>
0006
0007 /* I/O Port interface 4.2 */
0008 /* READ */
0009 #define STATUS(base) base
0010 #define STST    BIT(7)      /* Self Test in Progress */
0011 #define DIAGF   BIT(6)      /* Internal Diagnostic Failure */
0012 #define INIT    BIT(5)      /* Mailbox Initialization Required */
0013 #define IDLE    BIT(4)      /* SCSI Host Adapter Idle */
0014 #define CDF BIT(3)      /* Command/Data Out Port Full */
0015 #define DF  BIT(2)      /* Data In Port Full */
0016 /* BIT(1) is reserved */
0017 #define INVDCMD BIT(0)      /* Invalid H A Command */
0018 #define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)
0019
0020 #define INTRFLAGS(base) (STATUS(base)+2)
0021 #define ANYINTR BIT(7)      /* Any Interrupt */
0022 #define SCRD    BIT(3)      /* SCSI Reset Detected */
0023 #define HACC    BIT(2)      /* HA Command Complete */
0024 #define MBOA    BIT(1)      /* MBO Empty */
0025 #define MBIF    BIT(0)      /* MBI Full */
0026 #define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF)
0027
0028 /* WRITE */
0029 #define CONTROL(base) STATUS(base)
0030 #define HRST    BIT(7)      /* Hard Reset */
0031 #define SRST    BIT(6)      /* Soft Reset */
0032 #define IRST    BIT(5)      /* Interrupt Reset */
0033 #define SCRST   BIT(4)      /* SCSI Bus Reset */
0034
0035 /* READ/WRITE */
0036 #define DATA(base) (STATUS(base)+1)
0037 #define CMD_NOP     0x00    /* No Operation */
0038 #define CMD_MBINIT  0x01    /* Mailbox Initialization */
0039 #define CMD_START_SCSI  0x02    /* Start SCSI Command */
0040 #define CMD_INQUIRY 0x04    /* Adapter Inquiry */
0041 #define CMD_EMBOI   0x05    /* Enable MailBox Out Interrupt */
0042 #define CMD_BUSON_TIME  0x07    /* Set Bus-On Time */
0043 #define CMD_BUSOFF_TIME 0x08    /* Set Bus-Off Time */
0044 #define CMD_DMASPEED    0x09    /* Set AT Bus Transfer Speed */
0045 #define CMD_RETDEVS 0x0a    /* Return Installed Devices */
0046 #define CMD_RETCONF 0x0b    /* Return Configuration Data */
0047 #define CMD_RETSETUP    0x0d    /* Return Setup Data */
0048 #define CMD_ECHO    0x1f    /* ECHO Command Data */
0049
0050 #define CMD_EXTBIOS     0x28    /* Return extend bios information only 1542C */
0051 #define CMD_MBENABLE    0x29    /* Set Mailbox Interface enable only 1542C */
0052
0053 /* Mailbox Definition 5.2.1 and 5.2.2 */
0054 struct mailbox {
0055     u8 status;  /* Command/Status */
0056     u8 ccbptr[3];   /* msb, .., lsb */
0057 };
0058
0059 /* This is used with scatter-gather */
0060 struct chain {
0061     u8 datalen[3];  /* Size of this part of chain */
0062     u8 dataptr[3];  /* Location of data */
0063 };
0064
0065 /* These belong in scsi.h also */
0066 static inline void any2scsi(u8 *p, u32 v)
0067 {
0068     p[0] = v >> 16;
0069     p[1] = v >> 8;
0070     p[2] = v;
0071 }
0072
0073 #define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
0074
0075 #define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
0076               + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )
0077
0078 #define MAX_CDB 12
0079 #define MAX_SENSE 14
0080
0081 /* Command Control Block (CCB), 5.3 */
0082 struct ccb {
0083     u8 op;      /* Command Control Block Operation Code: */
0084             /* 0x00: SCSI Initiator CCB, 0x01: SCSI Target CCB, */
0085             /* 0x02: SCSI Initiator CCB with Scatter/Gather, */
0086             /* 0x81: SCSI Bus Device Reset CCB */
0087     u8 idlun;   /* Address and Direction Control: */
0088             /* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */
0089             /* Bit  4: Outbound data transfer, length is checked */
0090             /* Bit  3:  Inbound data transfer, length is checked */
0091             /* Bits 2-0: Logical Unit Number */
0092     u8 cdblen;  /* SCSI Command Length */
0093     u8 rsalen;  /* Request Sense Allocation Length/Disable Auto Sense */
0094     u8 datalen[3];  /* Data Length  (MSB, ..., LSB) */
0095     u8 dataptr[3];  /* Data Pointer (MSB, ..., LSB) */
0096     u8 linkptr[3];  /* Link Pointer (MSB, ..., LSB) */
0097     u8 commlinkid;  /* Command Linking Identifier */
0098     u8 hastat;  /* Host  Adapter Status (HASTAT) */
0099     u8 tarstat; /* Target Device Status (TARSTAT) */
0100     u8 reserved[2];
0101     u8 cdb[MAX_CDB + MAX_SENSE];    /* SCSI Command Descriptor Block */
0102                     /* followed by the Auto Sense data */
0103 };
0104
0105 #define AHA1542_REGION_SIZE 4
0106 #define AHA1542_MAILBOXES 8
0107
0108 #endif /* _AHA1542_H_ */