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/*
* wd33c93.h - Linux device driver definitions for the
* Commodore Amiga A2091/590 SCSI controller card
*
* IMPORTANT: This file is for version 1.25 - 09/Jul/1997
*
* Copyright (c) 1996 John Shifflett, GeoLog Consulting
* john@geolog.com
* jshiffle@netcom.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef WD33C93_H
#define WD33C93_H
#include <linux/config.h>
#define PROC_INTERFACE /* add code for /proc/scsi/wd33c93/xxx interface */
#ifdef PROC_INTERFACE
#define PROC_STATISTICS /* add code for keeping various real time stats */
#endif
#define SYNC_DEBUG /* extra info on sync negotiation printed */
#define DEBUGGING_ON /* enable command-line debugging bitmask */
#define DEBUG_DEFAULTS 0 /* default debugging bitmask */
#define ILLEGAL_STATUS_BYTE 0xff
#ifdef DEBUGGING_ON
#define DB(f,a) if (hostdata->args & (f)) a;
#else
#define DB(f,a)
#endif
#define uchar unsigned char
/* WD register names. */
#define WD_OWN_ID 0x00 /* Own ID register */
#define WD_CONTROL 0x01 /* Control bits */
#define WD_TIMEOUT_PERIOD 0x02 /* SCSI timeout period */
#define WD_CDB_1 0x03 /* SCSI command byte 1 */
#define WD_CDB_2 0x04 /* SCSI command byte 2 */
#define WD_CDB_3 0x05 /* SCSI command byte 3 */
#define WD_CDB_4 0x06 /* SCSI command byte 4 */
#define WD_CDB_5 0x07 /* SCSI command byte 5 */
#define WD_CDB_6 0x08 /* SCSI command byte 6 */
#define WD_CDB_7 0x09 /* SCSI command byte 7 */
#define WD_CDB_8 0x0a /* SCSI command byte 8 */
#define WD_CDB_9 0x0b /* SCSI command byte 9 */
#define WD_CDB_10 0x0c /* SCSI command byte 10 */
#define WD_CDB_11 0x0d /* SCSI command byte 11 */
#define WD_CDB_12 0x0e /* SCSI command byte 12 */
#define WD_TARGET_LUN 0x0f /* Target | Lun */
#define WD_COMMAND_PHASE 0x10 /* Phase register */
#define WD_SYNCHRONOUS_TRANSFER 0x11 /* Synchronous indicator */
#define WD_TRANSFER_COUNT_MSB 0x12 /* Trans cnt, bits<23:16> */
#define WD_TRANSFER_COUNT 0x13 /* Trans cnt, bits<15:8> */
#define WD_TRANSFER_COUNT_LSB 0x14 /* Trans cnt, bits<7:0> */
#define WD_DESTINATION_ID 0x15 /* Dest ID register */
#define WD_SOURCE_ID 0x16 /* Src ID register */
#define WD_SCSI_STATUS 0x17 /* Status register */
#define WD_COMMAND 0x18 /* Command reg */
#define WD_DATA 0x19 /* Data bus bit reg */
#define WD_QUEUE_TAG 0x1a /* Queue TAG reg (wd93b) */
#define WD_AUXILIARY_STATUS 0x1f /* Aux status reg */
/* WD commands. */
#define WD_CMD_RESET 0x00 /* Reset SCSI bus and wd93x chip */
#define WD_CMD_ABORT 0x01 /* Stop and abort current action */
#define WD_CMD_ASSERT_ATN 0x02 /* Assert ATN on SCSI bus */
#define WD_CMD_NEGATE_ACK 0x03 /* De-assert ACK on SCSI bus */
#define WD_CMD_DISCONNECT 0x04 /* Causes wd93x to force disconnect */
#define WD_CMD_RESELECT 0x05 /* Causes wd93x to reselect as targ */
#define WD_CMD_SEL_ATN 0x06 /* Tells wd93x to select w/ATN assrt */
#define WD_CMD_SEL 0x07 /* Tells wd93x to select w/o ATN assrt */
#define WD_CMD_SEL_ATN_XFER 0x08 /* Select w/ATN and transfer data */
#define WD_CMD_SEL_XFER 0x09 /* Select w/o ATN and transfer data */
#define WD_CMD_RESEL_RECEIVE 0x0a /* Reselect and into receive mode */
#define WD_CMD_RESEL_SEND 0x0b /* Reselect and into send mode */
#define WD_CMD_WAIT_SEL_RECEIVE 0x0c /* Await selection, into receive mode */
#define WD_CMD_TRANS_ADDR 0x18 /* Address translate */
#define WD_CMD_TRANS_INFO 0x20 /* Information transfer */
#define WD_CMD_TRANSFER_PAD 0x21 /* Information pad */
#define WD_CMD_SBT_MODE 0x80 /* XXX investigate for this comment */
/* ASR (Auxiliary Status) register values. */
#define ASR_INT (0x80) /* Showing an interrupt */
#define ASR_LCI (0x40) /* Ignored most recent command */
#define ASR_BSY (0x20) /* A level II command in progress, therefore busy */
#define ASR_CIP (0x10) /* A command is in progress */
#define ASR_PE (0x02) /* Detected a parity error */
#define ASR_DBR (0x01) /* The data buffer is ready */
/* SCSI Bus Phases. */
#define PHS_DATA_OUT (0x00)
#define PHS_DATA_IN (0x01)
#define PHS_COMMAND (0x02)
#define PHS_STATUS (0x03)
#define PHS_MESS_OUT (0x06)
#define PHS_MESS_IN (0x07)
/* Command Status Register definitions */
/* reset state interrupts */
#define CSR_RESET 0x00
#define CSR_RESET_AF 0x01
/* successful completion interrupts */
#define CSR_RESELECT 0x10
#define CSR_SELECT 0x11
#define CSR_SEL_XFER_DONE 0x16
#define CSR_XFER_DONE 0x18
/* paused or aborted interrupts */
#define CSR_MSGIN 0x20
#define CSR_SDP 0x21
#define CSR_SEL_ABORT 0x22
#define CSR_RESEL_ABORT 0x25
#define CSR_RESEL_ABORT_AM 0x27
#define CSR_ABORT 0x28
/* terminated interrupts */
#define CSR_INVALID 0x40
#define CSR_UNEXP_DISC 0x41
#define CSR_TIMEOUT 0x42
#define CSR_PARITY 0x43
#define CSR_PARITY_ATN 0x44
#define CSR_BAD_STATUS 0x45
#define CSR_UNEXP 0x48
/* service required interrupts */
#define CSR_RESEL 0x80
#define CSR_RESEL_AM 0x81
#define CSR_DISC 0x85
#define CSR_SRV_REQ 0x88
/* Own ID/CDB Size register */
#define OWNID_EAF 0x08
#define OWNID_EHP 0x10
#define OWNID_RAF 0x20
#define OWNID_FS_8 0x00
#define OWNID_FS_12 0x40
#define OWNID_FS_16 0x80
/* define these so we don't have to change a2091.c, etc. */
#define WD33C93_FS_8_10 OWNID_FS_8
#define WD33C93_FS_12_15 OWNID_FS_12
#define WD33C93_FS_16_20 OWNID_FS_16
/* Control register */
#define CTRL_HSP 0x01
#define CTRL_HA 0x02
#define CTRL_IDI 0x04
#define CTRL_EDI 0x08
#define CTRL_HHP 0x10
#define CTRL_POLLED 0x00
#define CTRL_BURST 0x20
#define CTRL_BUS 0x40
#define CTRL_DMA 0x80
/* Timeout Period register */
#define TIMEOUT_PERIOD_VALUE 20 /* 20 = 200 ms */
/* Synchronous Transfer Register */
#define STR_FSS 0x80
/* Destination ID register */
#define DSTID_DPD 0x40
#define DATA_OUT_DIR 0
#define DATA_IN_DIR 1
#define DSTID_SCC 0x80
/* Source ID register */
#define SRCID_MASK 0x07
#define SRCID_SIV 0x08
#define SRCID_DSP 0x20
#define SRCID_ES 0x40
#define SRCID_ER 0x80
/* This is what the 3393 chip looks like to us */
typedef struct {
volatile unsigned char SASR;
char pad;
#ifdef CONFIG_SGI
char pad2, pad3; /* HPC is funny like this... */
#endif
volatile unsigned char SCMD;
} wd33c93_regs;
typedef int (*dma_setup_t) (Scsi_Cmnd *SCpnt, int dir_in);
typedef void (*dma_stop_t) (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
int status);
#define DEFAULT_SX_PER 376 /* (ns) fairly safe */
#define DEFAULT_SX_OFF 0 /* aka async */
#define OPTIMUM_SX_PER 252 /* (ns) best we can do (mult-of-4) */
#define OPTIMUM_SX_OFF 12 /* size of wd3393 fifo */
struct sx_period {
unsigned int period_ns;
uchar reg_value;
};
/* FEF: defines for hostdata->dma_buffer_pool */
#define BUF_CHIP_ALLOCED 0
#define BUF_SCSI_ALLOCED 1
struct WD33C93_hostdata {
struct Scsi_Host *next;
wd33c93_regs *regp;
uchar clock_freq;
uchar chip; /* what kind of wd33c93? */
uchar microcode; /* microcode rev */
int dma_dir; /* data transfer dir. */
dma_setup_t dma_setup;
dma_stop_t dma_stop;
unsigned int dma_xfer_mask;
uchar *dma_bounce_buffer;
unsigned int dma_bounce_len;
uchar dma_buffer_pool; /* FEF: buffer from chip_ram? */
volatile uchar busy[8]; /* index = target, bit = lun */
volatile Scsi_Cmnd *input_Q; /* commands waiting to be started */
volatile Scsi_Cmnd *selecting; /* trying to select this command */
volatile Scsi_Cmnd *connected; /* currently connected command */
volatile Scsi_Cmnd *disconnected_Q;/* commands waiting for reconnect */
uchar state; /* what we are currently doing */
uchar dma; /* current state of DMA (on/off) */
uchar level2; /* extent to which Level-2 commands are used */
uchar disconnect; /* disconnect/reselect policy */
unsigned int args; /* set from command-line argument */
uchar incoming_msg[8]; /* filled during message_in phase */
int incoming_ptr; /* mainly used with EXTENDED messages */
uchar outgoing_msg[8]; /* send this during next message_out */
int outgoing_len; /* length of outgoing message */
unsigned int default_sx_per; /* default transfer period for SCSI bus */
uchar sync_xfer[8]; /* sync_xfer reg settings per target */
uchar sync_stat[8]; /* status of sync negotiation per target */
uchar no_sync; /* bitmask: don't do sync on these targets */
uchar no_dma; /* set this flag to disable DMA */
#ifdef PROC_INTERFACE
uchar proc; /* bitmask: what's in proc output */
#ifdef PROC_STATISTICS
unsigned long cmd_cnt[8]; /* # of commands issued per target */
unsigned long int_cnt; /* # of interrupts serviced */
unsigned long pio_cnt; /* # of pio data transfers */
unsigned long dma_cnt; /* # of DMA data transfers */
unsigned long disc_allowed_cnt[8]; /* # of disconnects allowed per target */
unsigned long disc_done_cnt[8]; /* # of disconnects done per target*/
#endif
#endif
};
#define CMDHOSTDATA(cmd) ((struct WD33C93_hostdata *) (cmd)->host->hostdata)
#define INSTHOSTDATA(inst) ((struct WD33C93_hostdata *) (inst)->hostdata)
/* defines for hostdata->chip */
#define C_WD33C93 0
#define C_WD33C93A 1
#define C_WD33C93B 2
#define C_UNKNOWN_CHIP 100
/* defines for hostdata->state */
#define S_UNCONNECTED 0
#define S_SELECTING 1
#define S_RUNNING_LEVEL2 2
#define S_CONNECTED 3
#define S_PRE_TMP_DISC 4
#define S_PRE_CMP_DISC 5
/* defines for hostdata->dma */
#define D_DMA_OFF 0
#define D_DMA_RUNNING 1
/* defines for hostdata->level2 */
/* NOTE: only the first 3 are implemented so far */
/* (The first 8 bits are reserved for compatibility. They function */
#if 0
#define L2_SELECT 2 /* start with SEL_ATN_XFER, but never resume it */
#endif
#define L2_NONE 0
#define L2_BASIC 3 /* resume after STATUS ints & RDP messages */
#define L2_DATA 4 /* resume after DATA_IN/OUT ints */
#define L2_MOST 5 /* resume after anything except a RESELECT int */
#define L2_RESELECT 6 /* resume after everything, including RESELECT ints */
#define L2_ALL 7 /* always resume */
/* defines for hostdata->disconnect */
#define DIS_NEVER 0
#define DIS_ADAPTIVE 1
#define DIS_ALWAYS 2
/* defines for hostdata->args */
#define DB_TEST1 (1<<0)
#define DB_TEST2 (1<<1)
#define DB_QCMD (1<<2)
#define DB_EXECUTE (1<<3)
#define DB_INTR (1<<4)
#define DB_TRANSFER (1<<5)
#define DB_MASK (0x3f)
/* defines for hostdata->sync_stat[] */
#define SS_UNSET 0
#define SS_FIRST 1
#define SS_WAITING 2
#define SS_SET 3
/* defines for hostdata->proc */
#define PR_VERSION (1<<0)
#define PR_INFO (1<<1)
#define PR_STATISTICS (1<<2)
#define PR_CONNECTED (1<<3)
#define PR_INPUTQ (1<<4)
#define PR_DISCQ (1<<5)
#define PR_TEST (1<<6)
#define PR_STOP (1<<7)
void wd33c93_init (struct Scsi_Host *instance, wd33c93_regs *regs,
dma_setup_t setup, dma_stop_t stop, int clock_freq);
int wd33c93_abort (Scsi_Cmnd *cmd);
int wd33c93_queuecommand (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *));
void wd33c93_intr (struct Scsi_Host *instance);
int wd33c93_proc_info(char *, char **, off_t, int, int, int);
#if LINUX_VERSION_CODE >= 0x010300
int wd33c93_reset (Scsi_Cmnd *, unsigned int);
#else
int wd33c93_reset (Scsi_Cmnd *);
#endif
#endif /* WD33C93_H */
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