413 lines
14 KiB
C
413 lines
14 KiB
C
/*
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* in2000.h - Linux device driver definitions for the
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* Always IN2000 ISA SCSI card.
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*
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* IMPORTANT: This file is for version 1.33 - 26/Aug/1998
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*
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* Copyright (c) 1996 John Shifflett, GeoLog Consulting
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* john@geolog.com
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* jshiffle@netcom.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef IN2000_H
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#define IN2000_H
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#include <asm/io.h>
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#define PROC_INTERFACE /* add code for /proc/scsi/in2000/xxx interface */
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#ifdef PROC_INTERFACE
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#define PROC_STATISTICS /* add code for keeping various real time stats */
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#endif
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#define SYNC_DEBUG /* extra info on sync negotiation printed */
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#define DEBUGGING_ON /* enable command-line debugging bitmask */
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#define DEBUG_DEFAULTS 0 /* default bitmask - change from command-line */
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#ifdef __i386__
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#define FAST_READ_IO /* No problems with these on my machine */
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#define FAST_WRITE_IO
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#endif
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#ifdef DEBUGGING_ON
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#define DB(f,a) if (hostdata->args & (f)) a;
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#define CHECK_NULL(p,s) /* if (!(p)) {printk("\n"); while (1) printk("NP:%s\r",(s));} */
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#else
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#define DB(f,a)
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#define CHECK_NULL(p,s)
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#endif
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#define uchar unsigned char
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#define read1_io(a) (inb(hostdata->io_base+(a)))
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#define read2_io(a) (inw(hostdata->io_base+(a)))
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#define write1_io(b,a) (outb((b),hostdata->io_base+(a)))
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#define write2_io(w,a) (outw((w),hostdata->io_base+(a)))
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#ifdef __i386__
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/* These inline assembly defines are derived from a patch
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* sent to me by Bill Earnest. He's done a lot of very
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* valuable thinking, testing, and coding during his effort
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* to squeeze more speed out of this driver. I really think
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* that we are doing IO at close to the maximum now with
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* the fifo. (And yes, insw uses 'edi' while outsw uses
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* 'esi'. Thanks Bill!)
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*/
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#define FAST_READ2_IO() \
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({ \
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int __dummy_1,__dummy_2; \
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__asm__ __volatile__ ("\n \
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cld \n \
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orl %%ecx, %%ecx \n \
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jz 1f \n \
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rep \n \
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insw (%%dx),%%es:(%%edi) \n \
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1: " \
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: "=D" (sp) ,"=c" (__dummy_1) ,"=d" (__dummy_2) /* output */ \
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: "2" (f), "0" (sp), "1" (i) /* input */ \
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); /* trashed */ \
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})
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#define FAST_WRITE2_IO() \
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({ \
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int __dummy_1,__dummy_2; \
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__asm__ __volatile__ ("\n \
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cld \n \
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orl %%ecx, %%ecx \n \
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jz 1f \n \
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rep \n \
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outsw %%ds:(%%esi),(%%dx) \n \
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1: " \
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: "=S" (sp) ,"=c" (__dummy_1) ,"=d" (__dummy_2)/* output */ \
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: "2" (f), "0" (sp), "1" (i) /* input */ \
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); /* trashed */ \
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})
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#endif
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/* IN2000 io_port offsets */
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#define IO_WD_ASR 0x00 /* R - 3393 auxstat reg */
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#define ASR_INT 0x80
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#define ASR_LCI 0x40
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#define ASR_BSY 0x20
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#define ASR_CIP 0x10
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#define ASR_PE 0x02
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#define ASR_DBR 0x01
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#define IO_WD_ADDR 0x00 /* W - 3393 address reg */
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#define IO_WD_DATA 0x01 /* R/W - rest of 3393 regs */
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#define IO_FIFO 0x02 /* R/W - in2000 dual-port fifo (16 bits) */
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#define IN2000_FIFO_SIZE 2048 /* fifo capacity in bytes */
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#define IO_CARD_RESET 0x03 /* W - in2000 start master reset */
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#define IO_FIFO_COUNT 0x04 /* R - in2000 fifo counter */
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#define IO_FIFO_WRITE 0x05 /* W - clear fifo counter, start write */
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#define IO_FIFO_READ 0x07 /* W - start fifo read */
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#define IO_LED_OFF 0x08 /* W - turn off in2000 activity LED */
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#define IO_SWITCHES 0x08 /* R - read in2000 dip switch */
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#define SW_ADDR0 0x01 /* bit 0 = bit 0 of index to io addr */
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#define SW_ADDR1 0x02 /* bit 1 = bit 1 of index io addr */
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#define SW_DISINT 0x04 /* bit 2 true if ints disabled */
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#define SW_INT0 0x08 /* bit 3 = bit 0 of index to interrupt */
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#define SW_INT1 0x10 /* bit 4 = bit 1 of index to interrupt */
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#define SW_INT_SHIFT 3 /* shift right this amount to right justify int bits */
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#define SW_SYNC_DOS5 0x20 /* bit 5 used by Always BIOS */
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#define SW_FLOPPY 0x40 /* bit 6 true if floppy enabled */
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#define SW_BIT7 0x80 /* bit 7 hardwired true (ground) */
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#define IO_LED_ON 0x09 /* W - turn on in2000 activity LED */
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#define IO_HARDWARE 0x0a /* R - read in2000 hardware rev, stop reset */
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#define IO_INTR_MASK 0x0c /* W - in2000 interrupt mask reg */
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#define IMASK_WD 0x01 /* WD33c93 interrupt mask */
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#define IMASK_FIFO 0x02 /* FIFO interrupt mask */
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/* wd register names */
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#define WD_OWN_ID 0x00
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#define WD_CONTROL 0x01
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#define WD_TIMEOUT_PERIOD 0x02
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#define WD_CDB_1 0x03
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#define WD_CDB_2 0x04
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#define WD_CDB_3 0x05
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#define WD_CDB_4 0x06
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#define WD_CDB_5 0x07
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#define WD_CDB_6 0x08
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#define WD_CDB_7 0x09
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#define WD_CDB_8 0x0a
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#define WD_CDB_9 0x0b
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#define WD_CDB_10 0x0c
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#define WD_CDB_11 0x0d
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#define WD_CDB_12 0x0e
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#define WD_TARGET_LUN 0x0f
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#define WD_COMMAND_PHASE 0x10
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#define WD_SYNCHRONOUS_TRANSFER 0x11
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#define WD_TRANSFER_COUNT_MSB 0x12
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#define WD_TRANSFER_COUNT 0x13
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#define WD_TRANSFER_COUNT_LSB 0x14
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#define WD_DESTINATION_ID 0x15
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#define WD_SOURCE_ID 0x16
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#define WD_SCSI_STATUS 0x17
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#define WD_COMMAND 0x18
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#define WD_DATA 0x19
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#define WD_QUEUE_TAG 0x1a
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#define WD_AUXILIARY_STATUS 0x1f
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/* WD commands */
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#define WD_CMD_RESET 0x00
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#define WD_CMD_ABORT 0x01
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#define WD_CMD_ASSERT_ATN 0x02
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#define WD_CMD_NEGATE_ACK 0x03
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#define WD_CMD_DISCONNECT 0x04
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#define WD_CMD_RESELECT 0x05
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#define WD_CMD_SEL_ATN 0x06
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#define WD_CMD_SEL 0x07
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#define WD_CMD_SEL_ATN_XFER 0x08
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#define WD_CMD_SEL_XFER 0x09
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#define WD_CMD_RESEL_RECEIVE 0x0a
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#define WD_CMD_RESEL_SEND 0x0b
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#define WD_CMD_WAIT_SEL_RECEIVE 0x0c
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#define WD_CMD_TRANS_ADDR 0x18
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#define WD_CMD_TRANS_INFO 0x20
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#define WD_CMD_TRANSFER_PAD 0x21
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#define WD_CMD_SBT_MODE 0x80
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/* SCSI Bus Phases */
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#define PHS_DATA_OUT 0x00
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#define PHS_DATA_IN 0x01
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#define PHS_COMMAND 0x02
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#define PHS_STATUS 0x03
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#define PHS_MESS_OUT 0x06
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#define PHS_MESS_IN 0x07
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/* Command Status Register definitions */
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/* reset state interrupts */
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#define CSR_RESET 0x00
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#define CSR_RESET_AF 0x01
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/* successful completion interrupts */
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#define CSR_RESELECT 0x10
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#define CSR_SELECT 0x11
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#define CSR_SEL_XFER_DONE 0x16
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#define CSR_XFER_DONE 0x18
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/* paused or aborted interrupts */
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#define CSR_MSGIN 0x20
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#define CSR_SDP 0x21
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#define CSR_SEL_ABORT 0x22
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#define CSR_RESEL_ABORT 0x25
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#define CSR_RESEL_ABORT_AM 0x27
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#define CSR_ABORT 0x28
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/* terminated interrupts */
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#define CSR_INVALID 0x40
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#define CSR_UNEXP_DISC 0x41
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#define CSR_TIMEOUT 0x42
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#define CSR_PARITY 0x43
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#define CSR_PARITY_ATN 0x44
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#define CSR_BAD_STATUS 0x45
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#define CSR_UNEXP 0x48
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/* service required interrupts */
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#define CSR_RESEL 0x80
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#define CSR_RESEL_AM 0x81
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#define CSR_DISC 0x85
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#define CSR_SRV_REQ 0x88
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/* Own ID/CDB Size register */
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#define OWNID_EAF 0x08
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#define OWNID_EHP 0x10
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#define OWNID_RAF 0x20
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#define OWNID_FS_8 0x00
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#define OWNID_FS_12 0x40
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#define OWNID_FS_16 0x80
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/* Control register */
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#define CTRL_HSP 0x01
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#define CTRL_HA 0x02
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#define CTRL_IDI 0x04
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#define CTRL_EDI 0x08
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#define CTRL_HHP 0x10
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#define CTRL_POLLED 0x00
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#define CTRL_BURST 0x20
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#define CTRL_BUS 0x40
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#define CTRL_DMA 0x80
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/* Timeout Period register */
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#define TIMEOUT_PERIOD_VALUE 20 /* results in 200 ms. */
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/* Synchronous Transfer Register */
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#define STR_FSS 0x80
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/* Destination ID register */
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#define DSTID_DPD 0x40
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#define DATA_OUT_DIR 0
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#define DATA_IN_DIR 1
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#define DSTID_SCC 0x80
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/* Source ID register */
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#define SRCID_MASK 0x07
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#define SRCID_SIV 0x08
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#define SRCID_DSP 0x20
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#define SRCID_ES 0x40
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#define SRCID_ER 0x80
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#define ILLEGAL_STATUS_BYTE 0xff
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#define DEFAULT_SX_PER 500 /* (ns) fairly safe */
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#define DEFAULT_SX_OFF 0 /* aka async */
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#define OPTIMUM_SX_PER 252 /* (ns) best we can do (mult-of-4) */
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#define OPTIMUM_SX_OFF 12 /* size of in2000 fifo */
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struct sx_period {
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unsigned int period_ns;
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uchar reg_value;
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};
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struct IN2000_hostdata {
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struct Scsi_Host *next;
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uchar chip; /* what kind of wd33c93 chip? */
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uchar microcode; /* microcode rev if 'B' */
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unsigned short io_base; /* IO port base */
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unsigned int dip_switch; /* dip switch settings */
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unsigned int hrev; /* hardware revision of card */
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volatile uchar busy[8]; /* index = target, bit = lun */
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volatile Scsi_Cmnd *input_Q; /* commands waiting to be started */
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volatile Scsi_Cmnd *selecting; /* trying to select this command */
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volatile Scsi_Cmnd *connected; /* currently connected command */
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volatile Scsi_Cmnd *disconnected_Q;/* commands waiting for reconnect */
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uchar state; /* what we are currently doing */
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uchar fifo; /* what the FIFO is up to */
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uchar level2; /* extent to which Level-2 commands are used */
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uchar disconnect; /* disconnect/reselect policy */
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unsigned int args; /* set from command-line argument */
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uchar incoming_msg[8]; /* filled during message_in phase */
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int incoming_ptr; /* mainly used with EXTENDED messages */
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uchar outgoing_msg[8]; /* send this during next message_out */
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int outgoing_len; /* length of outgoing message */
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unsigned int default_sx_per; /* default transfer period for SCSI bus */
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uchar sync_xfer[8]; /* sync_xfer reg settings per target */
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uchar sync_stat[8]; /* status of sync negotiation per target */
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uchar sync_off; /* bit mask: don't use sync with these targets */
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#ifdef PROC_INTERFACE
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uchar proc; /* bit mask: what's in proc output */
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#ifdef PROC_STATISTICS
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unsigned long cmd_cnt[8]; /* # of commands issued per target */
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unsigned long int_cnt; /* # of interrupts serviced */
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unsigned long disc_allowed_cnt[8]; /* # of disconnects allowed per target */
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unsigned long disc_done_cnt[8]; /* # of disconnects done per target*/
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#endif
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#endif
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};
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/* defines for hostdata->chip */
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#define C_WD33C93 0
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#define C_WD33C93A 1
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#define C_WD33C93B 2
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#define C_UNKNOWN_CHIP 100
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/* defines for hostdata->state */
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#define S_UNCONNECTED 0
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#define S_SELECTING 1
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#define S_RUNNING_LEVEL2 2
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#define S_CONNECTED 3
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#define S_PRE_TMP_DISC 4
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#define S_PRE_CMP_DISC 5
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/* defines for hostdata->fifo */
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#define FI_FIFO_UNUSED 0
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#define FI_FIFO_READING 1
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#define FI_FIFO_WRITING 2
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/* defines for hostdata->level2 */
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/* NOTE: only the first 3 are trustworthy at this point -
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* having trouble when more than 1 device is reading/writing
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* at the same time...
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*/
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#define L2_NONE 0 /* no combination commands - we get lots of ints */
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#define L2_SELECT 1 /* start with SEL_ATN_XFER, but never resume it */
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#define L2_BASIC 2 /* resume after STATUS ints & RDP messages */
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#define L2_DATA 3 /* resume after DATA_IN/OUT ints */
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#define L2_MOST 4 /* resume after anything except a RESELECT int */
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#define L2_RESELECT 5 /* resume after everything, including RESELECT ints */
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#define L2_ALL 6 /* always resume */
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/* defines for hostdata->disconnect */
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#define DIS_NEVER 0
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#define DIS_ADAPTIVE 1
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#define DIS_ALWAYS 2
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/* defines for hostdata->args */
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#define DB_TEST 1<<0
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#define DB_FIFO 1<<1
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#define DB_QUEUE_COMMAND 1<<2
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#define DB_EXECUTE 1<<3
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#define DB_INTR 1<<4
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#define DB_TRANSFER 1<<5
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#define DB_MASK 0x3f
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#define A_NO_SCSI_RESET 1<<15
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/* defines for hostdata->sync_xfer[] */
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#define SS_UNSET 0
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#define SS_FIRST 1
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#define SS_WAITING 2
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#define SS_SET 3
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/* defines for hostdata->proc */
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#define PR_VERSION 1<<0
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#define PR_INFO 1<<1
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#define PR_STATISTICS 1<<2
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#define PR_CONNECTED 1<<3
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#define PR_INPUTQ 1<<4
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#define PR_DISCQ 1<<5
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#define PR_TEST 1<<6
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#define PR_STOP 1<<7
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# include <linux/init.h>
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# include <linux/spinlock.h>
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# define in2000__INITFUNC(function) __initfunc(function)
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# define in2000__INIT __init
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# define in2000__INITDATA __initdata
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# define CLISPIN_LOCK(host,flags) spin_lock_irqsave(host->host_lock, flags)
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# define CLISPIN_UNLOCK(host,flags) spin_unlock_irqrestore(host->host_lock, \
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flags)
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static int in2000_detect(struct scsi_host_template *) in2000__INIT;
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static int in2000_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
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static int in2000_abort(Scsi_Cmnd *);
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static void in2000_setup(char *, int *) in2000__INIT;
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static int in2000_biosparam(struct scsi_device *, struct block_device *,
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sector_t, int *);
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static int in2000_bus_reset(Scsi_Cmnd *);
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#define IN2000_CAN_Q 16
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#define IN2000_SG SG_ALL
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#define IN2000_CPL 2
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#define IN2000_HOST_ID 7
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#endif /* IN2000_H */
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