1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _AHA1542_H_ 3#define _AHA1542_H_ 4 5#include <linux/types.h> 6 7/* I/O Port interface 4.2 */ 8/* READ */ 9#define STATUS(base) base 10#define STST BIT(7) /* Self Test in Progress */ 11#define DIAGF BIT(6) /* Internal Diagnostic Failure */ 12#define INIT BIT(5) /* Mailbox Initialization Required */ 13#define IDLE BIT(4) /* SCSI Host Adapter Idle */ 14#define CDF BIT(3) /* Command/Data Out Port Full */ 15#define DF BIT(2) /* Data In Port Full */ 16/* BIT(1) is reserved */ 17#define INVDCMD BIT(0) /* Invalid H A Command */ 18#define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD) 19 20#define INTRFLAGS(base) (STATUS(base)+2) 21#define ANYINTR BIT(7) /* Any Interrupt */ 22#define SCRD BIT(3) /* SCSI Reset Detected */ 23#define HACC BIT(2) /* HA Command Complete */ 24#define MBOA BIT(1) /* MBO Empty */ 25#define MBIF BIT(0) /* MBI Full */ 26#define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF) 27 28/* WRITE */ 29#define CONTROL(base) STATUS(base) 30#define HRST BIT(7) /* Hard Reset */ 31#define SRST BIT(6) /* Soft Reset */ 32#define IRST BIT(5) /* Interrupt Reset */ 33#define SCRST BIT(4) /* SCSI Bus Reset */ 34 35/* READ/WRITE */ 36#define DATA(base) (STATUS(base)+1) 37#define CMD_NOP 0x00 /* No Operation */ 38#define CMD_MBINIT 0x01 /* Mailbox Initialization */ 39#define CMD_START_SCSI 0x02 /* Start SCSI Command */ 40#define CMD_INQUIRY 0x04 /* Adapter Inquiry */ 41#define CMD_EMBOI 0x05 /* Enable MailBox Out Interrupt */ 42#define CMD_BUSON_TIME 0x07 /* Set Bus-On Time */ 43#define CMD_BUSOFF_TIME 0x08 /* Set Bus-Off Time */ 44#define CMD_DMASPEED 0x09 /* Set AT Bus Transfer Speed */ 45#define CMD_RETDEVS 0x0a /* Return Installed Devices */ 46#define CMD_RETCONF 0x0b /* Return Configuration Data */ 47#define CMD_RETSETUP 0x0d /* Return Setup Data */ 48#define CMD_ECHO 0x1f /* ECHO Command Data */ 49 50#define CMD_EXTBIOS 0x28 /* Return extend bios information only 1542C */ 51#define CMD_MBENABLE 0x29 /* Set Mailbox Interface enable only 1542C */ 52 53/* Mailbox Definition 5.2.1 and 5.2.2 */ 54struct mailbox { 55 u8 status; /* Command/Status */ 56 u8 ccbptr[3]; /* msb, .., lsb */ 57}; 58 59/* This is used with scatter-gather */ 60struct chain { 61 u8 datalen[3]; /* Size of this part of chain */ 62 u8 dataptr[3]; /* Location of data */ 63}; 64 65/* These belong in scsi.h also */ 66static inline void any2scsi(u8 *p, u32 v) 67{ 68 p[0] = v >> 16; 69 p[1] = v >> 8; 70 p[2] = v; 71} 72 73#define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) ) 74 75#define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \ 76 + (((long)(up)[2]) << 8) + ((long)(up)[3]) ) 77 78#define MAX_CDB 12 79#define MAX_SENSE 14 80 81/* Command Control Block (CCB), 5.3 */ 82struct ccb { 83 u8 op; /* Command Control Block Operation Code: */ 84 /* 0x00: SCSI Initiator CCB, 0x01: SCSI Target CCB, */ 85 /* 0x02: SCSI Initiator CCB with Scatter/Gather, */ 86 /* 0x81: SCSI Bus Device Reset CCB */ 87 u8 idlun; /* Address and Direction Control: */ 88 /* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */ 89 /* Bit 4: Outbound data transfer, length is checked */ 90 /* Bit 3: Inbound data transfer, length is checked */ 91 /* Bits 2-0: Logical Unit Number */ 92 u8 cdblen; /* SCSI Command Length */ 93 u8 rsalen; /* Request Sense Allocation Length/Disable Auto Sense */ 94 u8 datalen[3]; /* Data Length (MSB, ..., LSB) */ 95 u8 dataptr[3]; /* Data Pointer (MSB, ..., LSB) */ 96 u8 linkptr[3]; /* Link Pointer (MSB, ..., LSB) */ 97 u8 commlinkid; /* Command Linking Identifier */ 98 u8 hastat; /* Host Adapter Status (HASTAT) */ 99 u8 tarstat; /* Target Device Status (TARSTAT) */ 100 u8 reserved[2]; 101 u8 cdb[MAX_CDB + MAX_SENSE]; /* SCSI Command Descriptor Block */ 102 /* followed by the Auto Sense data */ 103}; 104 105#define AHA1542_REGION_SIZE 4 106#define AHA1542_MAILBOXES 8 107 108#endif /* _AHA1542_H_ */ 109