drivers/scsi/initio.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /**************************************************************************
0003  * Initio 9100 device driver for Linux.
0004  *
0005  * Copyright (c) 1994-1998 Initio Corporation
0006  * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
0007  * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
0008  * Copyright (c) 2007 Red Hat
0009  *
0010  *************************************************************************
0011  *
0012  * DESCRIPTION:
0013  *
0014  * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
0015  * adapters
0016  *
0017  * 08/06/97 hc  - v1.01h
0018  *      - Support inic-940 and inic-935
0019  * 09/26/97 hc  - v1.01i
0020  *      - Make correction from J.W. Schultz suggestion
0021  * 10/13/97 hc  - Support reset function
0022  * 10/21/97 hc  - v1.01j
0023  *      - Support 32 LUN (SCSI 3)
0024  * 01/14/98 hc  - v1.01k
0025  *      - Fix memory allocation problem
0026  * 03/04/98 hc  - v1.01l
0027  *      - Fix tape rewind which will hang the system problem
0028  *      - Set can_queue to initio_num_scb
0029  * 06/25/98 hc  - v1.01m
0030  *      - Get it work for kernel version >= 2.1.75
0031  *      - Dynamic assign SCSI bus reset holding time in initio_init()
0032  * 07/02/98 hc  - v1.01n
0033  *      - Support 0002134A
0034  * 08/07/98 hc  - v1.01o
0035  *      - Change the initio_abort_srb routine to use scsi_done. <01>
0036  * 09/07/98 hl  - v1.02
0037  *              - Change the INI9100U define and proc_dir_entry to
0038  *                reflect the newer Kernel 2.1.118, but the v1.o1o
0039  *                should work with Kernel 2.1.118.
0040  * 09/20/98 wh  - v1.02a
0041  *              - Support Abort command.
0042  *              - Handle reset routine.
0043  * 09/21/98 hl  - v1.03
0044  *              - remove comments.
0045  * 12/09/98 bv  - v1.03a
0046  *      - Removed unused code
0047  * 12/13/98 bv  - v1.03b
0048  *      - Remove cli() locking for kernels >= 2.1.95. This uses
0049  *        spinlocks to serialize access to the pSRB_head and
0050  *        pSRB_tail members of the HCS structure.
0051  * 09/01/99 bv  - v1.03d
0052  *      - Fixed a deadlock problem in SMP.
0053  * 21/01/99 bv  - v1.03e
0054  *      - Add support for the Domex 3192U PCI SCSI
0055  *        This is a slightly modified patch by
0056  *        Brian Macy <bmacy@sunshinecomputing.com>
0057  * 22/02/99 bv  - v1.03f
0058  *      - Didn't detect the INIC-950 in 2.0.x correctly.
0059  *        Now fixed.
0060  * 05/07/99 bv  - v1.03g
0061  *      - Changed the assumption that HZ = 100
0062  * 10/17/03 mc  - v1.04
0063  *      - added new DMA API support
0064  * 06/01/04 jmd - v1.04a
0065  *      - Re-add reset_bus support
0066  **************************************************************************/
0067
0068 #include <linux/module.h>
0069 #include <linux/errno.h>
0070 #include <linux/delay.h>
0071 #include <linux/pci.h>
0072 #include <linux/init.h>
0073 #include <linux/blkdev.h>
0074 #include <linux/spinlock.h>
0075 #include <linux/stat.h>
0076 #include <linux/kernel.h>
0077 #include <linux/proc_fs.h>
0078 #include <linux/string.h>
0079 #include <linux/interrupt.h>
0080 #include <linux/ioport.h>
0081 #include <linux/slab.h>
0082 #include <linux/jiffies.h>
0083 #include <linux/dma-mapping.h>
0084 #include <asm/io.h>
0085
0086 #include <scsi/scsi.h>
0087 #include <scsi/scsi_cmnd.h>
0088 #include <scsi/scsi_device.h>
0089 #include <scsi/scsi_host.h>
0090 #include <scsi/scsi_tcq.h>
0091
0092 #include "initio.h"
0093
0094 #define SENSE_SIZE      14
0095
0096 #define i91u_MAXQUEUE       2
0097 #define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
0098
0099 #ifdef DEBUG_i91u
0100 static unsigned int i91u_debug = DEBUG_DEFAULT;
0101 #endif
0102
0103 static int initio_tag_enable = 1;
0104
0105 #ifdef DEBUG_i91u
0106 static int setup_debug = 0;
0107 #endif
0108
0109 static void i91uSCBPost(u8 * pHcb, u8 * pScb);
0110
0111 #define DEBUG_INTERRUPT 0
0112 #define DEBUG_QUEUE     0
0113 #define DEBUG_STATE     0
0114 #define INT_DISC    0
0115
0116 /*--- forward references ---*/
0117 static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
0118 static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
0119
0120 static int tulip_main(struct initio_host * host);
0121
0122 static int initio_next_state(struct initio_host * host);
0123 static int initio_state_1(struct initio_host * host);
0124 static int initio_state_2(struct initio_host * host);
0125 static int initio_state_3(struct initio_host * host);
0126 static int initio_state_4(struct initio_host * host);
0127 static int initio_state_5(struct initio_host * host);
0128 static int initio_state_6(struct initio_host * host);
0129 static int initio_state_7(struct initio_host * host);
0130 static int initio_xfer_data_in(struct initio_host * host);
0131 static int initio_xfer_data_out(struct initio_host * host);
0132 static int initio_xpad_in(struct initio_host * host);
0133 static int initio_xpad_out(struct initio_host * host);
0134 static int initio_status_msg(struct initio_host * host);
0135
0136 static int initio_msgin(struct initio_host * host);
0137 static int initio_msgin_sync(struct initio_host * host);
0138 static int initio_msgin_accept(struct initio_host * host);
0139 static int initio_msgout_reject(struct initio_host * host);
0140 static int initio_msgin_extend(struct initio_host * host);
0141
0142 static int initio_msgout_ide(struct initio_host * host);
0143 static int initio_msgout_abort_targ(struct initio_host * host);
0144 static int initio_msgout_abort_tag(struct initio_host * host);
0145
0146 static int initio_bus_device_reset(struct initio_host * host);
0147 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
0148 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
0149 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
0150 static int int_initio_busfree(struct initio_host * host);
0151 static int int_initio_scsi_rst(struct initio_host * host);
0152 static int int_initio_bad_seq(struct initio_host * host);
0153 static int int_initio_resel(struct initio_host * host);
0154 static int initio_sync_done(struct initio_host * host);
0155 static int wdtr_done(struct initio_host * host);
0156 static int wait_tulip(struct initio_host * host);
0157 static int initio_wait_done_disc(struct initio_host * host);
0158 static int initio_wait_disc(struct initio_host * host);
0159 static void tulip_scsi(struct initio_host * host);
0160 static int initio_post_scsi_rst(struct initio_host * host);
0161
0162 static void initio_se2_ew_en(unsigned long base);
0163 static void initio_se2_ew_ds(unsigned long base);
0164 static int initio_se2_rd_all(unsigned long base);
0165 static void initio_se2_update_all(unsigned long base);  /* setup default pattern */
0166 static void initio_read_eeprom(unsigned long base);
0167
0168 /* ---- INTERNAL VARIABLES ---- */
0169
0170 static NVRAM i91unvram;
0171 static NVRAM *i91unvramp;
0172
0173 static u8 i91udftNvRam[64] =
0174 {
0175     /*----------- header -----------*/
0176     0x25, 0xc9,     /* Signature    */
0177     0x40,           /* Size         */
0178     0x01,           /* Revision     */
0179     /* -- Host Adapter Structure -- */
0180     0x95,           /* ModelByte0   */
0181     0x00,           /* ModelByte1   */
0182     0x00,           /* ModelInfo    */
0183     0x01,           /* NumOfCh      */
0184     NBC1_DEFAULT,       /* BIOSConfig1  */
0185     0,          /* BIOSConfig2  */
0186     0,          /* HAConfig1    */
0187     0,          /* HAConfig2    */
0188     /* SCSI channel 0 and target Structure  */
0189     7,          /* SCSIid       */
0190     NCC1_DEFAULT,       /* SCSIconfig1  */
0191     0,          /* SCSIconfig2  */
0192     0x10,           /* NumSCSItarget */
0193
0194     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0195     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0196     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0197     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0198
0199     /* SCSI channel 1 and target Structure  */
0200     7,          /* SCSIid       */
0201     NCC1_DEFAULT,       /* SCSIconfig1  */
0202     0,          /* SCSIconfig2  */
0203     0x10,           /* NumSCSItarget */
0204
0205     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0206     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0207     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0208     NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0209     0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0210     0, 0};          /*      - CheckSum -            */
0211
0212
0213 static u8 initio_rate_tbl[8] =  /* fast 20      */
0214 {
0215                 /* nanosecond divide by 4 */
0216     12,         /* 50ns,  20M   */
0217     18,         /* 75ns,  13.3M */
0218     25,         /* 100ns, 10M   */
0219     31,         /* 125ns, 8M    */
0220     37,         /* 150ns, 6.6M  */
0221     43,         /* 175ns, 5.7M  */
0222     50,         /* 200ns, 5M    */
0223     62          /* 250ns, 4M    */
0224 };
0225
0226 static void initio_do_pause(unsigned amount)
0227 {
0228     /* Pause for amount jiffies */
0229     unsigned long the_time = jiffies + amount;
0230
0231     while (time_before_eq(jiffies, the_time))
0232         cpu_relax();
0233 }
0234
0235 /*-- forward reference --*/
0236
0237 /******************************************************************
0238  Input: instruction for  Serial E2PROM
0239
0240  EX: se2_rd(0 call se2_instr() to send address and read command
0241
0242      StartBit  OP_Code   Address                Data
0243      --------- --------  ------------------     -------
0244      1         1 , 0     A5,A4,A3,A2,A1,A0      D15-D0
0245
0246          +-----------------------------------------------------
0247          |
0248  CS -----+
0249             +--+  +--+  +--+  +--+  +--+
0250             ^  |  ^  |  ^  |  ^  |  ^  |
0251             |  |  |  |  |  |  |  |  |  |
0252  CLK -------+  +--+  +--+  +--+  +--+  +--
0253  (leading edge trigger)
0254
0255          +--1-----1--+
0256          | SB    OP  |  OP    A5    A4
0257  DI  ----+           +--0------------------
0258  (address and cmd sent to nvram)
0259
0260      -------------------------------------------+
0261                                                 |
0262  DO                                             +---
0263  (data sent from nvram)
0264
0265
0266 ******************************************************************/
0267
0268 /**
0269  *  initio_se2_instr    -   bitbang an instruction
0270  *  @base: Base of InitIO controller
0271  *  @instr: Instruction for serial E2PROM
0272  *
0273  *  Bitbang an instruction out to the serial E2Prom
0274  */
0275
0276 static void initio_se2_instr(unsigned long base, u8 instr)
0277 {
0278     int i;
0279     u8 b;
0280
0281     outb(SE2CS | SE2DO, base + TUL_NVRAM);      /* cs+start bit */
0282     udelay(30);
0283     outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
0284     udelay(30);
0285
0286     for (i = 0; i < 8; i++) {
0287         if (instr & 0x80)
0288             b = SE2CS | SE2DO;      /* -CLK+dataBit */
0289         else
0290             b = SE2CS;          /* -CLK */
0291         outb(b, base + TUL_NVRAM);
0292         udelay(30);
0293         outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
0294         udelay(30);
0295         instr <<= 1;
0296     }
0297     outb(SE2CS, base + TUL_NVRAM);          /* -CLK */
0298     udelay(30);
0299 }
0300
0301
0302 /**
0303  *  initio_se2_ew_en    -   Enable erase/write
0304  *  @base: Base address of InitIO controller
0305  *
0306  *  Enable erase/write state of serial EEPROM
0307  */
0308 void initio_se2_ew_en(unsigned long base)
0309 {
0310     initio_se2_instr(base, 0x30);   /* EWEN */
0311     outb(0, base + TUL_NVRAM);  /* -CS  */
0312     udelay(30);
0313 }
0314
0315
0316 /**
0317  *  initio_se2_ew_ds    -   Disable erase/write
0318  *  @base: Base address of InitIO controller
0319  *
0320  *  Disable erase/write state of serial EEPROM
0321  */
0322 void initio_se2_ew_ds(unsigned long base)
0323 {
0324     initio_se2_instr(base, 0);  /* EWDS */
0325     outb(0, base + TUL_NVRAM);  /* -CS  */
0326     udelay(30);
0327 }
0328
0329
0330 /**
0331  *  initio_se2_rd       -   read E2PROM word
0332  *  @base: Base of InitIO controller
0333  *  @addr: Address of word in E2PROM
0334  *
0335  *  Read a word from the NV E2PROM device
0336  */
0337 static u16 initio_se2_rd(unsigned long base, u8 addr)
0338 {
0339     u8 instr, rb;
0340     u16 val = 0;
0341     int i;
0342
0343     instr = (u8) (addr | 0x80);
0344     initio_se2_instr(base, instr);  /* READ INSTR */
0345
0346     for (i = 15; i >= 0; i--) {
0347         outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
0348         udelay(30);
0349         outb(SE2CS, base + TUL_NVRAM);      /* -CLK */
0350
0351         /* sample data after the following edge of clock  */
0352         rb = inb(base + TUL_NVRAM);
0353         rb &= SE2DI;
0354         val += (rb << i);
0355         udelay(30); /* 6/20/95 */
0356     }
0357
0358     outb(0, base + TUL_NVRAM);      /* no chip select */
0359     udelay(30);
0360     return val;
0361 }
0362
0363 /**
0364  *  initio_se2_wr       -   read E2PROM word
0365  *  @base: Base of InitIO controller
0366  *  @addr: Address of word in E2PROM
0367  *  @val: Value to write
0368  *
0369  *  Write a word to the NV E2PROM device. Used when recovering from
0370  *  a problem with the NV.
0371  */
0372 static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
0373 {
0374     u8 rb;
0375     u8 instr;
0376     int i;
0377
0378     instr = (u8) (addr | 0x40);
0379     initio_se2_instr(base, instr);  /* WRITE INSTR */
0380     for (i = 15; i >= 0; i--) {
0381         if (val & 0x8000)
0382             outb(SE2CS | SE2DO, base + TUL_NVRAM);  /* -CLK+dataBit 1 */
0383         else
0384             outb(SE2CS, base + TUL_NVRAM);      /* -CLK+dataBit 0 */
0385         udelay(30);
0386         outb(SE2CS | SE2CLK, base + TUL_NVRAM);     /* +CLK */
0387         udelay(30);
0388         val <<= 1;
0389     }
0390     outb(SE2CS, base + TUL_NVRAM);              /* -CLK */
0391     udelay(30);
0392     outb(0, base + TUL_NVRAM);              /* -CS  */
0393     udelay(30);
0394
0395     outb(SE2CS, base + TUL_NVRAM);              /* +CS  */
0396     udelay(30);
0397
0398     for (;;) {
0399         outb(SE2CS | SE2CLK, base + TUL_NVRAM);     /* +CLK */
0400         udelay(30);
0401         outb(SE2CS, base + TUL_NVRAM);          /* -CLK */
0402         udelay(30);
0403         if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
0404             break;  /* write complete */
0405     }
0406     outb(0, base + TUL_NVRAM);              /* -CS */
0407 }
0408
0409 /**
0410  *  initio_se2_rd_all   -   read hostadapter NV configuration
0411  *  @base: Base address of InitIO controller
0412  *
0413  *  Reads the E2PROM data into main memory. Ensures that the checksum
0414  *  and header marker are valid. Returns 1 on success -1 on error.
0415  */
0416
0417 static int initio_se2_rd_all(unsigned long base)
0418 {
0419     int i;
0420     u16 chksum = 0;
0421     u16 *np;
0422
0423     i91unvramp = &i91unvram;
0424     np = (u16 *) i91unvramp;
0425     for (i = 0; i < 32; i++)
0426         *np++ = initio_se2_rd(base, i);
0427
0428     /* Is signature "ini" ok ? */
0429     if (i91unvramp->NVM_Signature != INI_SIGNATURE)
0430         return -1;
0431     /* Is ckecksum ok ? */
0432     np = (u16 *) i91unvramp;
0433     for (i = 0; i < 31; i++)
0434         chksum += *np++;
0435     if (i91unvramp->NVM_CheckSum != chksum)
0436         return -1;
0437     return 1;
0438 }
0439
0440 /**
0441  *  initio_se2_update_all       -   Update E2PROM
0442  *  @base: Base of InitIO controller
0443  *
0444  *  Update the E2PROM by wrting any changes into the E2PROM
0445  *  chip, rewriting the checksum.
0446  */
0447 static void initio_se2_update_all(unsigned long base)
0448 {               /* setup default pattern */
0449     int i;
0450     u16 chksum = 0;
0451     u16 *np, *np1;
0452
0453     i91unvramp = &i91unvram;
0454     /* Calculate checksum first */
0455     np = (u16 *) i91udftNvRam;
0456     for (i = 0; i < 31; i++)
0457         chksum += *np++;
0458     *np = chksum;
0459     initio_se2_ew_en(base); /* Enable write  */
0460
0461     np = (u16 *) i91udftNvRam;
0462     np1 = (u16 *) i91unvramp;
0463     for (i = 0; i < 32; i++, np++, np1++) {
0464         if (*np != *np1)
0465             initio_se2_wr(base, i, *np);
0466     }
0467     initio_se2_ew_ds(base); /* Disable write   */
0468 }
0469
0470 /**
0471  *  initio_read_eeprom      -   Retrieve configuration
0472  *  @base: Base of InitIO Host Adapter
0473  *
0474  *  Retrieve the host adapter configuration data from E2Prom. If the
0475  *  data is invalid then the defaults are used and are also restored
0476  *  into the E2PROM. This forms the access point for the SCSI driver
0477  *  into the E2PROM layer, the other functions for the E2PROM are all
0478  *  internal use.
0479  *
0480  *  Must be called single threaded, uses a shared global area.
0481  */
0482
0483 static void initio_read_eeprom(unsigned long base)
0484 {
0485     u8 gctrl;
0486
0487     i91unvramp = &i91unvram;
0488     /* Enable EEProm programming */
0489     gctrl = inb(base + TUL_GCTRL);
0490     outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
0491     if (initio_se2_rd_all(base) != 1) {
0492         initio_se2_update_all(base);    /* setup default pattern */
0493         initio_se2_rd_all(base);    /* load again  */
0494     }
0495     /* Disable EEProm programming */
0496     gctrl = inb(base + TUL_GCTRL);
0497     outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
0498 }
0499
0500 /**
0501  *  initio_stop_bm      -   stop bus master
0502  *  @host: InitIO we are stopping
0503  *
0504  *  Stop any pending DMA operation, aborting the DMA if necessary
0505  */
0506
0507 static void initio_stop_bm(struct initio_host * host)
0508 {
0509
0510     if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
0511         outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
0512         /* wait Abort DMA xfer done */
0513         while ((inb(host->addr + TUL_Int) & XABT) == 0)
0514             cpu_relax();
0515     }
0516     outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
0517 }
0518
0519 /**
0520  *  initio_reset_scsi       -   Reset SCSI host controller
0521  *  @host: InitIO host to reset
0522  *  @seconds: Recovery time
0523  *
0524  *  Perform a full reset of the SCSI subsystem.
0525  */
0526
0527 static int initio_reset_scsi(struct initio_host * host, int seconds)
0528 {
0529     outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
0530
0531     while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
0532         cpu_relax();
0533
0534     /* reset tulip chip */
0535     outb(0, host->addr + TUL_SSignal);
0536
0537     /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
0538     /* SONY 5200 tape drive won't work if only stall for 1 sec */
0539     /* FIXME: this is a very long busy wait right now */
0540     initio_do_pause(seconds * HZ);
0541
0542     inb(host->addr + TUL_SInt);
0543     return SCSI_RESET_SUCCESS;
0544 }
0545
0546 /**
0547  *  initio_init     -   set up an InitIO host adapter
0548  *  @host: InitIO host adapter
0549  *  @bios_addr: BIOS address
0550  *
0551  *  Set up the host adapter and devices according to the configuration
0552  *  retrieved from the E2PROM.
0553  *
0554  *  Locking: Calls E2PROM layer code which is not re-enterable so must
0555  *  run single threaded for now.
0556  */
0557
0558 static void initio_init(struct initio_host * host, u8 *bios_addr)
0559 {
0560     int i;
0561     u8 *flags;
0562     u8 *heads;
0563
0564     /* Get E2Prom configuration */
0565     initio_read_eeprom(host->addr);
0566     if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
0567         host->max_tar = 8;
0568     else
0569         host->max_tar = 16;
0570
0571     host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
0572
0573     host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
0574     host->idmask = ~(1 << host->scsi_id);
0575
0576 #ifdef CHK_PARITY
0577     /* Enable parity error response */
0578     outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
0579 #endif
0580
0581     /* Mask all the interrupt       */
0582     outb(0x1F, host->addr + TUL_Mask);
0583
0584     initio_stop_bm(host);
0585     /* --- Initialize the tulip --- */
0586     outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
0587
0588     /* program HBA's SCSI ID        */
0589     outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
0590
0591     /* Enable Initiator Mode ,phase latch,alternate sync period mode,
0592        disable SCSI reset */
0593     if (host->config & HCC_EN_PAR)
0594         host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
0595     else
0596         host->sconf1 = (TSC_INITDEFAULT);
0597     outb(host->sconf1, host->addr + TUL_SConfig);
0598
0599     /* Enable HW reselect */
0600     outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
0601
0602     outb(0, host->addr + TUL_SPeriod);
0603
0604     /* selection time out = 250 ms */
0605     outb(153, host->addr + TUL_STimeOut);
0606
0607     /* Enable SCSI terminator */
0608     outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
0609         host->addr + TUL_XCtrl);
0610     outb(((host->config & HCC_AUTO_TERM) >> 4) |
0611         (inb(host->addr + TUL_GCTRL1) & 0xFE),
0612         host->addr + TUL_GCTRL1);
0613
0614     for (i = 0,
0615          flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
0616          heads = bios_addr + 0x180;
0617          i < host->max_tar;
0618          i++, flags++) {
0619         host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
0620         if (host->targets[i].flags & TCF_EN_255)
0621             host->targets[i].drv_flags = TCF_DRV_255_63;
0622         else
0623             host->targets[i].drv_flags = 0;
0624         host->targets[i].js_period = 0;
0625         host->targets[i].sconfig0 = host->sconf1;
0626         host->targets[i].heads = *heads++;
0627         if (host->targets[i].heads == 255)
0628             host->targets[i].drv_flags = TCF_DRV_255_63;
0629         else
0630             host->targets[i].drv_flags = 0;
0631         host->targets[i].sectors = *heads++;
0632         host->targets[i].flags &= ~TCF_BUSY;
0633         host->act_tags[i] = 0;
0634         host->max_tags[i] = 0xFF;
0635     }           /* for                          */
0636     printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
0637            host->addr, host->pci_dev->irq,
0638            host->bios_addr, host->scsi_id);
0639     /* Reset SCSI Bus */
0640     if (host->config & HCC_SCSI_RESET) {
0641         printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
0642         initio_reset_scsi(host, 10);
0643     }
0644     outb(0x17, host->addr + TUL_SCFG1);
0645     outb(0xE9, host->addr + TUL_SIntEnable);
0646 }
0647
0648 /**
0649  *  initio_alloc_scb        -   Allocate an SCB
0650  *  @host: InitIO host we are allocating for
0651  *
0652  *  Walk the SCB list for the controller and allocate a free SCB if
0653  *  one exists.
0654  */
0655 static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
0656 {
0657     struct scsi_ctrl_blk *scb;
0658     unsigned long flags;
0659
0660     spin_lock_irqsave(&host->avail_lock, flags);
0661     if ((scb = host->first_avail) != NULL) {
0662 #if DEBUG_QUEUE
0663         printk("find scb at %p\n", scb);
0664 #endif
0665         if ((host->first_avail = scb->next) == NULL)
0666             host->last_avail = NULL;
0667         scb->next = NULL;
0668         scb->status = SCB_RENT;
0669     }
0670     spin_unlock_irqrestore(&host->avail_lock, flags);
0671     return scb;
0672 }
0673
0674 /**
0675  *  initio_release_scb      -   Release an SCB
0676  *  @host: InitIO host that owns the SCB
0677  *  @cmnd: SCB command block being returned
0678  *
0679  *  Return an allocated SCB to the host free list
0680  */
0681
0682 static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
0683 {
0684     unsigned long flags;
0685
0686 #if DEBUG_QUEUE
0687     printk("Release SCB %p; ", cmnd);
0688 #endif
0689     spin_lock_irqsave(&(host->avail_lock), flags);
0690     cmnd->srb = NULL;
0691     cmnd->status = 0;
0692     cmnd->next = NULL;
0693     if (host->last_avail != NULL) {
0694         host->last_avail->next = cmnd;
0695         host->last_avail = cmnd;
0696     } else {
0697         host->first_avail = cmnd;
0698         host->last_avail = cmnd;
0699     }
0700     spin_unlock_irqrestore(&(host->avail_lock), flags);
0701 }
0702
0703 /***************************************************************************/
0704 static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
0705 {
0706
0707 #if DEBUG_QUEUE
0708     printk("Append pend SCB %p; ", scbp);
0709 #endif
0710     scbp->status = SCB_PEND;
0711     scbp->next = NULL;
0712     if (host->last_pending != NULL) {
0713         host->last_pending->next = scbp;
0714         host->last_pending = scbp;
0715     } else {
0716         host->first_pending = scbp;
0717         host->last_pending = scbp;
0718     }
0719 }
0720
0721 /***************************************************************************/
0722 static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
0723 {
0724
0725 #if DEBUG_QUEUE
0726     printk("Push pend SCB %p; ", scbp);
0727 #endif
0728     scbp->status = SCB_PEND;
0729     if ((scbp->next = host->first_pending) != NULL) {
0730         host->first_pending = scbp;
0731     } else {
0732         host->first_pending = scbp;
0733         host->last_pending = scbp;
0734     }
0735 }
0736
0737 static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
0738 {
0739     struct scsi_ctrl_blk *first;
0740
0741
0742     first = host->first_pending;
0743     while (first != NULL) {
0744         if (first->opcode != ExecSCSI)
0745             return first;
0746         if (first->tagmsg == 0) {
0747             if ((host->act_tags[first->target] == 0) &&
0748                 !(host->targets[first->target].flags & TCF_BUSY))
0749                 return first;
0750         } else {
0751             if ((host->act_tags[first->target] >=
0752               host->max_tags[first->target]) |
0753                 (host->targets[first->target].flags & TCF_BUSY)) {
0754                 first = first->next;
0755                 continue;
0756             }
0757             return first;
0758         }
0759         first = first->next;
0760     }
0761     return first;
0762 }
0763
0764 static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
0765 {
0766     struct scsi_ctrl_blk *tmp, *prev;
0767
0768 #if DEBUG_QUEUE
0769     printk("unlink pend SCB %p; ", scb);
0770 #endif
0771
0772     prev = tmp = host->first_pending;
0773     while (tmp != NULL) {
0774         if (scb == tmp) {   /* Unlink this SCB              */
0775             if (tmp == host->first_pending) {
0776                 if ((host->first_pending = tmp->next) == NULL)
0777                     host->last_pending = NULL;
0778             } else {
0779                 prev->next = tmp->next;
0780                 if (tmp == host->last_pending)
0781                     host->last_pending = prev;
0782             }
0783             tmp->next = NULL;
0784             break;
0785         }
0786         prev = tmp;
0787         tmp = tmp->next;
0788     }
0789 }
0790
0791 static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
0792 {
0793
0794 #if DEBUG_QUEUE
0795     printk("append busy SCB %p; ", scbp);
0796 #endif
0797     if (scbp->tagmsg)
0798         host->act_tags[scbp->target]++;
0799     else
0800         host->targets[scbp->target].flags |= TCF_BUSY;
0801     scbp->status = SCB_BUSY;
0802     scbp->next = NULL;
0803     if (host->last_busy != NULL) {
0804         host->last_busy->next = scbp;
0805         host->last_busy = scbp;
0806     } else {
0807         host->first_busy = scbp;
0808         host->last_busy = scbp;
0809     }
0810 }
0811
0812 /***************************************************************************/
0813 static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
0814 {
0815     struct scsi_ctrl_blk *tmp;
0816
0817
0818     if ((tmp = host->first_busy) != NULL) {
0819         if ((host->first_busy = tmp->next) == NULL)
0820             host->last_busy = NULL;
0821         tmp->next = NULL;
0822         if (tmp->tagmsg)
0823             host->act_tags[tmp->target]--;
0824         else
0825             host->targets[tmp->target].flags &= ~TCF_BUSY;
0826     }
0827 #if DEBUG_QUEUE
0828     printk("Pop busy SCB %p; ", tmp);
0829 #endif
0830     return tmp;
0831 }
0832
0833 /***************************************************************************/
0834 static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
0835 {
0836     struct scsi_ctrl_blk *tmp, *prev;
0837
0838 #if DEBUG_QUEUE
0839     printk("unlink busy SCB %p; ", scb);
0840 #endif
0841
0842     prev = tmp = host->first_busy;
0843     while (tmp != NULL) {
0844         if (scb == tmp) {   /* Unlink this SCB              */
0845             if (tmp == host->first_busy) {
0846                 if ((host->first_busy = tmp->next) == NULL)
0847                     host->last_busy = NULL;
0848             } else {
0849                 prev->next = tmp->next;
0850                 if (tmp == host->last_busy)
0851                     host->last_busy = prev;
0852             }
0853             tmp->next = NULL;
0854             if (tmp->tagmsg)
0855                 host->act_tags[tmp->target]--;
0856             else
0857                 host->targets[tmp->target].flags &= ~TCF_BUSY;
0858             break;
0859         }
0860         prev = tmp;
0861         tmp = tmp->next;
0862     }
0863     return;
0864 }
0865
0866 struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
0867 {
0868     struct scsi_ctrl_blk *tmp;
0869     u16 scbp_tarlun;
0870
0871
0872     tmp = host->first_busy;
0873     while (tmp != NULL) {
0874         scbp_tarlun = (tmp->lun << 8) | (tmp->target);
0875         if (scbp_tarlun == tarlun) {    /* Unlink this SCB              */
0876             break;
0877         }
0878         tmp = tmp->next;
0879     }
0880 #if DEBUG_QUEUE
0881     printk("find busy SCB %p; ", tmp);
0882 #endif
0883     return tmp;
0884 }
0885
0886 static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
0887 {
0888 #if DEBUG_QUEUE
0889     printk("append done SCB %p; ", scbp);
0890 #endif
0891
0892     scbp->status = SCB_DONE;
0893     scbp->next = NULL;
0894     if (host->last_done != NULL) {
0895         host->last_done->next = scbp;
0896         host->last_done = scbp;
0897     } else {
0898         host->first_done = scbp;
0899         host->last_done = scbp;
0900     }
0901 }
0902
0903 struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
0904 {
0905     struct scsi_ctrl_blk *tmp;
0906
0907     if ((tmp = host->first_done) != NULL) {
0908         if ((host->first_done = tmp->next) == NULL)
0909             host->last_done = NULL;
0910         tmp->next = NULL;
0911     }
0912 #if DEBUG_QUEUE
0913     printk("find done SCB %p; ",tmp);
0914 #endif
0915     return tmp;
0916 }
0917
0918 static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
0919 {
0920     unsigned long flags;
0921     struct scsi_ctrl_blk *tmp, *prev;
0922
0923     spin_lock_irqsave(&host->semaph_lock, flags);
0924
0925     if ((host->semaph == 0) && (host->active == NULL)) {
0926         /* disable Jasmin SCSI Int        */
0927         outb(0x1F, host->addr + TUL_Mask);
0928         spin_unlock_irqrestore(&host->semaph_lock, flags);
0929         /* FIXME: synchronize_irq needed ? */
0930         tulip_main(host);
0931         spin_lock_irqsave(&host->semaph_lock, flags);
0932         host->semaph = 1;
0933         outb(0x0F, host->addr + TUL_Mask);
0934         spin_unlock_irqrestore(&host->semaph_lock, flags);
0935         return SCSI_ABORT_SNOOZE;
0936     }
0937     prev = tmp = host->first_pending;   /* Check Pend queue */
0938     while (tmp != NULL) {
0939         /* 07/27/98 */
0940         if (tmp->srb == srbp) {
0941             if (tmp == host->active) {
0942                 spin_unlock_irqrestore(&host->semaph_lock, flags);
0943                 return SCSI_ABORT_BUSY;
0944             } else if (tmp == host->first_pending) {
0945                 if ((host->first_pending = tmp->next) == NULL)
0946                     host->last_pending = NULL;
0947             } else {
0948                 prev->next = tmp->next;
0949                 if (tmp == host->last_pending)
0950                     host->last_pending = prev;
0951             }
0952             tmp->hastat = HOST_ABORTED;
0953             tmp->flags |= SCF_DONE;
0954             if (tmp->flags & SCF_POST)
0955                 (*tmp->post) ((u8 *) host, (u8 *) tmp);
0956             spin_unlock_irqrestore(&host->semaph_lock, flags);
0957             return SCSI_ABORT_SUCCESS;
0958         }
0959         prev = tmp;
0960         tmp = tmp->next;
0961     }
0962
0963     prev = tmp = host->first_busy;  /* Check Busy queue */
0964     while (tmp != NULL) {
0965         if (tmp->srb == srbp) {
0966             if (tmp == host->active) {
0967                 spin_unlock_irqrestore(&host->semaph_lock, flags);
0968                 return SCSI_ABORT_BUSY;
0969             } else if (tmp->tagmsg == 0) {
0970                 spin_unlock_irqrestore(&host->semaph_lock, flags);
0971                 return SCSI_ABORT_BUSY;
0972             } else {
0973                 host->act_tags[tmp->target]--;
0974                 if (tmp == host->first_busy) {
0975                     if ((host->first_busy = tmp->next) == NULL)
0976                         host->last_busy = NULL;
0977                 } else {
0978                     prev->next = tmp->next;
0979                     if (tmp == host->last_busy)
0980                         host->last_busy = prev;
0981                 }
0982                 tmp->next = NULL;
0983
0984
0985                 tmp->hastat = HOST_ABORTED;
0986                 tmp->flags |= SCF_DONE;
0987                 if (tmp->flags & SCF_POST)
0988                     (*tmp->post) ((u8 *) host, (u8 *) tmp);
0989                 spin_unlock_irqrestore(&host->semaph_lock, flags);
0990                 return SCSI_ABORT_SUCCESS;
0991             }
0992         }
0993         prev = tmp;
0994         tmp = tmp->next;
0995     }
0996     spin_unlock_irqrestore(&host->semaph_lock, flags);
0997     return SCSI_ABORT_NOT_RUNNING;
0998 }
0999
1000 /***************************************************************************/
1001 static int initio_bad_seq(struct initio_host * host)
1002 {
1003     struct scsi_ctrl_blk *scb;
1004
1005     printk("initio_bad_seg c=%d\n", host->index);
1006
1007     if ((scb = host->active) != NULL) {
1008         initio_unlink_busy_scb(host, scb);
1009         scb->hastat = HOST_BAD_PHAS;
1010         scb->tastat = 0;
1011         initio_append_done_scb(host, scb);
1012     }
1013     initio_stop_bm(host);
1014     initio_reset_scsi(host, 8); /* 7/29/98 */
1015     return initio_post_scsi_rst(host);
1016 }
1017
1018
1019 /************************************************************************/
1020 static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1021 {
1022     unsigned long flags;
1023
1024     scb->mode = 0;
1025
1026     scb->sgidx = 0;
1027     scb->sgmax = scb->sglen;
1028
1029     spin_lock_irqsave(&host->semaph_lock, flags);
1030
1031     initio_append_pend_scb(host, scb);  /* Append this SCB to Pending queue */
1032
1033 /* VVVVV 07/21/98 */
1034     if (host->semaph == 1) {
1035         /* Disable Jasmin SCSI Int */
1036         outb(0x1F, host->addr + TUL_Mask);
1037         host->semaph = 0;
1038         spin_unlock_irqrestore(&host->semaph_lock, flags);
1039
1040         tulip_main(host);
1041
1042         spin_lock_irqsave(&host->semaph_lock, flags);
1043         host->semaph = 1;
1044         outb(0x0F, host->addr + TUL_Mask);
1045     }
1046     spin_unlock_irqrestore(&host->semaph_lock, flags);
1047     return;
1048 }
1049
1050 /***************************************************************************/
1051 static int initio_isr(struct initio_host * host)
1052 {
1053     if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1054         if (host->semaph == 1) {
1055             outb(0x1F, host->addr + TUL_Mask);
1056             /* Disable Tulip SCSI Int */
1057             host->semaph = 0;
1058
1059             tulip_main(host);
1060
1061             host->semaph = 1;
1062             outb(0x0F, host->addr + TUL_Mask);
1063             return 1;
1064         }
1065     }
1066     return 0;
1067 }
1068
1069 static int tulip_main(struct initio_host * host)
1070 {
1071     struct scsi_ctrl_blk *scb;
1072
1073     for (;;) {
1074         tulip_scsi(host);   /* Call tulip_scsi              */
1075
1076         /* Walk the list of completed SCBs */
1077         while ((scb = initio_find_done_scb(host)) != NULL) {    /* find done entry */
1078             if (scb->tastat == INI_QUEUE_FULL) {
1079                 host->max_tags[scb->target] =
1080                     host->act_tags[scb->target] - 1;
1081                 scb->tastat = 0;
1082                 initio_append_pend_scb(host, scb);
1083                 continue;
1084             }
1085             if (!(scb->mode & SCM_RSENS)) {     /* not in auto req. sense mode */
1086                 if (scb->tastat == 2) {
1087
1088                     /* clr sync. nego flag */
1089
1090                     if (scb->flags & SCF_SENSE) {
1091                         u8 len;
1092                         len = scb->senselen;
1093                         if (len == 0)
1094                             len = 1;
1095                         scb->buflen = scb->senselen;
1096                         scb->bufptr = scb->senseptr;
1097                         scb->flags &= ~(SCF_SG | SCF_DIR);  /* for xfer_data_in */
1098                         /* so, we won't report wrong direction in xfer_data_in,
1099                            and won't report HOST_DO_DU in state_6 */
1100                         scb->mode = SCM_RSENS;
1101                         scb->ident &= 0xBF; /* Disable Disconnect */
1102                         scb->tagmsg = 0;
1103                         scb->tastat = 0;
1104                         scb->cdblen = 6;
1105                         scb->cdb[0] = SCSICMD_RequestSense;
1106                         scb->cdb[1] = 0;
1107                         scb->cdb[2] = 0;
1108                         scb->cdb[3] = 0;
1109                         scb->cdb[4] = len;
1110                         scb->cdb[5] = 0;
1111                         initio_push_pend_scb(host, scb);
1112                         break;
1113                     }
1114                 }
1115             } else {    /* in request sense mode */
1116
1117                 if (scb->tastat == 2) {     /* check contition status again after sending
1118                                        requset sense cmd 0x3 */
1119                     scb->hastat = HOST_BAD_PHAS;
1120                 }
1121                 scb->tastat = 2;
1122             }
1123             scb->flags |= SCF_DONE;
1124             if (scb->flags & SCF_POST) {
1125                 /* FIXME: only one post method and lose casts */
1126                 (*scb->post) ((u8 *) host, (u8 *) scb);
1127             }
1128         }       /* while */
1129         /* find_active: */
1130         if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1131             continue;
1132         if (host->active)   /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1133             return 1;   /* return to OS, enable interrupt */
1134         /* Check pending SCB            */
1135         if (initio_find_first_pend_scb(host) == NULL)
1136             return 1;   /* return to OS, enable interrupt */
1137     }           /* End of for loop */
1138     /* statement won't reach here */
1139 }
1140
1141 static void tulip_scsi(struct initio_host * host)
1142 {
1143     struct scsi_ctrl_blk *scb;
1144     struct target_control *active_tc;
1145
1146     /* make sure to service interrupt asap */
1147     if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1148         host->phase = host->jsstatus0 & TSS_PH_MASK;
1149         host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1150         host->jsint = inb(host->addr + TUL_SInt);
1151         if (host->jsint & TSS_SCSIRST_INT) {    /* SCSI bus reset detected      */
1152             int_initio_scsi_rst(host);
1153             return;
1154         }
1155         if (host->jsint & TSS_RESEL_INT) {  /* if selected/reselected interrupt */
1156             if (int_initio_resel(host) == 0)
1157                 initio_next_state(host);
1158             return;
1159         }
1160         if (host->jsint & TSS_SEL_TIMEOUT) {
1161             int_initio_busfree(host);
1162             return;
1163         }
1164         if (host->jsint & TSS_DISC_INT) {   /* BUS disconnection            */
1165             int_initio_busfree(host);   /* unexpected bus free or sel timeout */
1166             return;
1167         }
1168         if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1169             if ((scb = host->active) != NULL)
1170                 initio_next_state(host);
1171             return;
1172         }
1173     }
1174     if (host->active != NULL)
1175         return;
1176
1177     if ((scb = initio_find_first_pend_scb(host)) == NULL)
1178         return;
1179
1180     /* program HBA's SCSI ID & target SCSI ID */
1181     outb((host->scsi_id << 4) | (scb->target & 0x0F),
1182         host->addr + TUL_SScsiId);
1183     if (scb->opcode == ExecSCSI) {
1184         active_tc = &host->targets[scb->target];
1185
1186         if (scb->tagmsg)
1187             active_tc->drv_flags |= TCF_DRV_EN_TAG;
1188         else
1189             active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1190
1191         outb(active_tc->js_period, host->addr + TUL_SPeriod);
1192         if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {  /* do wdtr negotiation          */
1193             initio_select_atn_stop(host, scb);
1194         } else {
1195             if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation          */
1196                 initio_select_atn_stop(host, scb);
1197             } else {
1198                 if (scb->tagmsg)
1199                     initio_select_atn3(host, scb);
1200                 else
1201                     initio_select_atn(host, scb);
1202             }
1203         }
1204         if (scb->flags & SCF_POLL) {
1205             while (wait_tulip(host) != -1) {
1206                 if (initio_next_state(host) == -1)
1207                     break;
1208             }
1209         }
1210     } else if (scb->opcode == BusDevRst) {
1211         initio_select_atn_stop(host, scb);
1212         scb->next_state = 8;
1213         if (scb->flags & SCF_POLL) {
1214             while (wait_tulip(host) != -1) {
1215                 if (initio_next_state(host) == -1)
1216                     break;
1217             }
1218         }
1219     } else if (scb->opcode == AbortCmd) {
1220         if (initio_abort_srb(host, scb->srb) != 0) {
1221             initio_unlink_pend_scb(host, scb);
1222             initio_release_scb(host, scb);
1223         } else {
1224             scb->opcode = BusDevRst;
1225             initio_select_atn_stop(host, scb);
1226             scb->next_state = 8;
1227         }
1228     } else {
1229         initio_unlink_pend_scb(host, scb);
1230         scb->hastat = 0x16; /* bad command */
1231         initio_append_done_scb(host, scb);
1232     }
1233     return;
1234 }
1235
1236 /**
1237  *  initio_next_state       -   Next SCSI state
1238  *  @host: InitIO host we are processing
1239  *
1240  *  Progress the active command block along the state machine
1241  *  until we hit a state which we must wait for activity to occur.
1242  *
1243  *  Returns zero or a negative code.
1244  */
1245
1246 static int initio_next_state(struct initio_host * host)
1247 {
1248     int next;
1249
1250     next = host->active->next_state;
1251     for (;;) {
1252         switch (next) {
1253         case 1:
1254             next = initio_state_1(host);
1255             break;
1256         case 2:
1257             next = initio_state_2(host);
1258             break;
1259         case 3:
1260             next = initio_state_3(host);
1261             break;
1262         case 4:
1263             next = initio_state_4(host);
1264             break;
1265         case 5:
1266             next = initio_state_5(host);
1267             break;
1268         case 6:
1269             next = initio_state_6(host);
1270             break;
1271         case 7:
1272             next = initio_state_7(host);
1273             break;
1274         case 8:
1275             return initio_bus_device_reset(host);
1276         default:
1277             return initio_bad_seq(host);
1278         }
1279         if (next <= 0)
1280             return next;
1281     }
1282 }
1283
1284
1285 /**
1286  *  initio_state_1      -   SCSI state machine
1287  *  @host: InitIO host we are controlling
1288  *
1289  *  Perform SCSI state processing for Select/Attention/Stop
1290  */
1291
1292 static int initio_state_1(struct initio_host * host)
1293 {
1294     struct scsi_ctrl_blk *scb = host->active;
1295     struct target_control *active_tc = host->active_tc;
1296 #if DEBUG_STATE
1297     printk("-s1-");
1298 #endif
1299
1300     /* Move the SCB from pending to busy */
1301     initio_unlink_pend_scb(host, scb);
1302     initio_append_busy_scb(host, scb);
1303
1304     outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1305     /* ATN on */
1306     if (host->phase == MSG_OUT) {
1307         outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1308         outb(scb->ident, host->addr + TUL_SFifo);
1309
1310         if (scb->tagmsg) {
1311             outb(scb->tagmsg, host->addr + TUL_SFifo);
1312             outb(scb->tagid, host->addr + TUL_SFifo);
1313         }
1314         if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1315             active_tc->flags |= TCF_WDTR_DONE;
1316             outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1317             outb(2, host->addr + TUL_SFifo);    /* Extended msg length */
1318             outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* Sync request */
1319             outb(1, host->addr + TUL_SFifo);    /* Start from 16 bits */
1320         } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1321             active_tc->flags |= TCF_SYNC_DONE;
1322             outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1323             outb(3, host->addr + TUL_SFifo);    /* extended msg length */
1324             outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* sync request */
1325             outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1326             outb(MAX_OFFSET, host->addr + TUL_SFifo);   /* REQ/ACK offset */
1327         }
1328         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1329         if (wait_tulip(host) == -1)
1330             return -1;
1331     }
1332     outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1333     outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1334     /* Into before CDB xfer */
1335     return 3;
1336 }
1337
1338
1339 /**
1340  *  initio_state_2      -   SCSI state machine
1341  *  @host: InitIO host we are controlling
1342  *
1343  * state after selection with attention
1344  * state after selection with attention3
1345  */
1346
1347 static int initio_state_2(struct initio_host * host)
1348 {
1349     struct scsi_ctrl_blk *scb = host->active;
1350     struct target_control *active_tc = host->active_tc;
1351 #if DEBUG_STATE
1352     printk("-s2-");
1353 #endif
1354
1355     initio_unlink_pend_scb(host, scb);
1356     initio_append_busy_scb(host, scb);
1357
1358     outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1359
1360     if (host->jsstatus1 & TSS_CMD_PH_CMP)
1361         return 4;
1362
1363     outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1364     outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1365     /* Into before CDB xfer */
1366     return 3;
1367 }
1368
1369 /**
1370  *  initio_state_3      -   SCSI state machine
1371  *  @host: InitIO host we are controlling
1372  *
1373  * state before CDB xfer is done
1374  */
1375
1376 static int initio_state_3(struct initio_host * host)
1377 {
1378     struct scsi_ctrl_blk *scb = host->active;
1379     struct target_control *active_tc = host->active_tc;
1380     int i;
1381
1382 #if DEBUG_STATE
1383     printk("-s3-");
1384 #endif
1385     for (;;) {
1386         switch (host->phase) {
1387         case CMD_OUT:   /* Command out phase            */
1388             for (i = 0; i < (int) scb->cdblen; i++)
1389                 outb(scb->cdb[i], host->addr + TUL_SFifo);
1390             outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1391             if (wait_tulip(host) == -1)
1392                 return -1;
1393             if (host->phase == CMD_OUT)
1394                 return initio_bad_seq(host);
1395             return 4;
1396
1397         case MSG_IN:    /* Message in phase             */
1398             scb->next_state = 3;
1399             if (initio_msgin(host) == -1)
1400                 return -1;
1401             break;
1402
1403         case STATUS_IN: /* Status phase                 */
1404             if (initio_status_msg(host) == -1)
1405                 return -1;
1406             break;
1407
1408         case MSG_OUT:   /* Message out phase            */
1409             if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1410                 outb(NOP, host->addr + TUL_SFifo);      /* msg nop */
1411                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1412                 if (wait_tulip(host) == -1)
1413                     return -1;
1414             } else {
1415                 active_tc->flags |= TCF_SYNC_DONE;
1416
1417                 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1418                 outb(3, host->addr + TUL_SFifo);    /* ext. msg len */
1419                 outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* sync request */
1420                 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1421                 outb(MAX_OFFSET, host->addr + TUL_SFifo);   /* REQ/ACK offset */
1422                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1423                 if (wait_tulip(host) == -1)
1424                     return -1;
1425                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1426                 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1427
1428             }
1429             break;
1430         default:
1431             return initio_bad_seq(host);
1432         }
1433     }
1434 }
1435
1436 /**
1437  *  initio_state_4      -   SCSI state machine
1438  *  @host: InitIO host we are controlling
1439  *
1440  *  SCSI state machine. State 4
1441  */
1442
1443 static int initio_state_4(struct initio_host * host)
1444 {
1445     struct scsi_ctrl_blk *scb = host->active;
1446
1447 #if DEBUG_STATE
1448     printk("-s4-");
1449 #endif
1450     if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1451         return 6;   /* Go to state 6 (After data) */
1452     }
1453     for (;;) {
1454         if (scb->buflen == 0)
1455             return 6;
1456
1457         switch (host->phase) {
1458
1459         case STATUS_IN: /* Status phase                 */
1460             if ((scb->flags & SCF_DIR) != 0)    /* if direction bit set then report data underrun */
1461                 scb->hastat = HOST_DO_DU;
1462             if ((initio_status_msg(host)) == -1)
1463                 return -1;
1464             break;
1465
1466         case MSG_IN:    /* Message in phase             */
1467             scb->next_state = 0x4;
1468             if (initio_msgin(host) == -1)
1469                 return -1;
1470             break;
1471
1472         case MSG_OUT:   /* Message out phase            */
1473             if (host->jsstatus0 & TSS_PAR_ERROR) {
1474                 scb->buflen = 0;
1475                 scb->hastat = HOST_DO_DU;
1476                 if (initio_msgout_ide(host) == -1)
1477                     return -1;
1478                 return 6;
1479             } else {
1480                 outb(NOP, host->addr + TUL_SFifo);      /* msg nop */
1481                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1482                 if (wait_tulip(host) == -1)
1483                     return -1;
1484             }
1485             break;
1486
1487         case DATA_IN:   /* Data in phase                */
1488             return initio_xfer_data_in(host);
1489
1490         case DATA_OUT:  /* Data out phase               */
1491             return initio_xfer_data_out(host);
1492
1493         default:
1494             return initio_bad_seq(host);
1495         }
1496     }
1497 }
1498
1499
1500 /**
1501  *  initio_state_5      -   SCSI state machine
1502  *  @host: InitIO host we are controlling
1503  *
1504  *  State after dma xfer done or phase change before xfer done
1505  */
1506
1507 static int initio_state_5(struct initio_host * host)
1508 {
1509     struct scsi_ctrl_blk *scb = host->active;
1510     long cnt, xcnt;     /* cannot use unsigned !! code: if (xcnt < 0) */
1511
1512 #if DEBUG_STATE
1513     printk("-s5-");
1514 #endif
1515     /*------ get remaining count -------*/
1516     cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1517
1518     if (inb(host->addr + TUL_XCmd) & 0x20) {
1519         /* ----------------------- DATA_IN ----------------------------- */
1520         /* check scsi parity error */
1521         if (host->jsstatus0 & TSS_PAR_ERROR)
1522             scb->hastat = HOST_DO_DU;
1523         if (inb(host->addr + TUL_XStatus) & XPEND) {    /* DMA xfer pending, Send STOP  */
1524             /* tell Hardware  scsi xfer has been terminated */
1525             outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1526             /* wait until DMA xfer not pending */
1527             while (inb(host->addr + TUL_XStatus) & XPEND)
1528                 cpu_relax();
1529         }
1530     } else {
1531         /*-------- DATA OUT -----------*/
1532         if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1533             if (host->active_tc->js_period & TSC_WIDE_SCSI)
1534                 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1535             else
1536                 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1537         }
1538         if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
1539             outb(TAX_X_ABT, host->addr + TUL_XCmd);
1540             /* wait Abort DMA xfer done */
1541             while ((inb(host->addr + TUL_Int) & XABT) == 0)
1542                 cpu_relax();
1543         }
1544         if ((cnt == 1) && (host->phase == DATA_OUT)) {
1545             outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1546             if (wait_tulip(host) == -1)
1547                 return -1;
1548             cnt = 0;
1549         } else {
1550             if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1551                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1552         }
1553     }
1554     if (cnt == 0) {
1555         scb->buflen = 0;
1556         return 6;   /* After Data */
1557     }
1558     /* Update active data pointer */
1559     xcnt = (long) scb->buflen - cnt;    /* xcnt== bytes already xferred */
1560     scb->buflen = (u32) cnt;        /* cnt == bytes left to be xferred */
1561     if (scb->flags & SCF_SG) {
1562         struct sg_entry *sgp;
1563         unsigned long i;
1564
1565         sgp = &scb->sglist[scb->sgidx];
1566         for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1567             xcnt -= (long) sgp->len;
1568             if (xcnt < 0) {     /* this sgp xfer half done */
1569                 xcnt += (long) sgp->len;    /* xcnt == bytes xferred in this sgp */
1570                 sgp->data += (u32) xcnt;    /* new ptr to be xfer */
1571                 sgp->len -= (u32) xcnt; /* new len to be xfer */
1572                 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1573                 /* new SG table ptr */
1574                 scb->sglen = (u8) (scb->sgmax - i);
1575                 /* new SG table len */
1576                 scb->sgidx = (u16) i;
1577                 /* for next disc and come in this loop */
1578                 return 4;   /* Go to state 4                */
1579             }
1580             /* else (xcnt >= 0 , i.e. this sgp already xferred */
1581         }       /* for */
1582         return 6;   /* Go to state 6                */
1583     } else {
1584         scb->bufptr += (u32) xcnt;
1585     }
1586     return 4;       /* Go to state 4                */
1587 }
1588
1589 /**
1590  *  initio_state_6      -   SCSI state machine
1591  *  @host: InitIO host we are controlling
1592  *
1593  *  State after Data phase
1594  */
1595
1596 static int initio_state_6(struct initio_host * host)
1597 {
1598     struct scsi_ctrl_blk *scb = host->active;
1599
1600 #if DEBUG_STATE
1601     printk("-s6-");
1602 #endif
1603     for (;;) {
1604         switch (host->phase) {
1605         case STATUS_IN: /* Status phase                 */
1606             if ((initio_status_msg(host)) == -1)
1607                 return -1;
1608             break;
1609
1610         case MSG_IN:    /* Message in phase             */
1611             scb->next_state = 6;
1612             if ((initio_msgin(host)) == -1)
1613                 return -1;
1614             break;
1615
1616         case MSG_OUT:   /* Message out phase            */
1617             outb(NOP, host->addr + TUL_SFifo);      /* msg nop */
1618             outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1619             if (wait_tulip(host) == -1)
1620                 return -1;
1621             break;
1622
1623         case DATA_IN:   /* Data in phase                */
1624             return initio_xpad_in(host);
1625
1626         case DATA_OUT:  /* Data out phase               */
1627             return initio_xpad_out(host);
1628
1629         default:
1630             return initio_bad_seq(host);
1631         }
1632     }
1633 }
1634
1635 /**
1636  *  initio_state_7      -   SCSI state machine
1637  *  @host: InitIO host we are controlling
1638  *
1639  */
1640
1641 static int initio_state_7(struct initio_host * host)
1642 {
1643     int cnt, i;
1644
1645 #if DEBUG_STATE
1646     printk("-s7-");
1647 #endif
1648     /* flush SCSI FIFO */
1649     cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1650     if (cnt) {
1651         for (i = 0; i < cnt; i++)
1652             inb(host->addr + TUL_SFifo);
1653     }
1654     switch (host->phase) {
1655     case DATA_IN:       /* Data in phase                */
1656     case DATA_OUT:      /* Data out phase               */
1657         return initio_bad_seq(host);
1658     default:
1659         return 6;   /* Go to state 6                */
1660     }
1661 }
1662
1663 /**
1664  *  initio_xfer_data_in -   Commence data input
1665  *  @host: InitIO host in use
1666  *
1667  *  Commence a block of data transfer. The transfer itself will
1668  *  be managed by the controller and we will get a completion (or
1669  *  failure) interrupt.
1670  */
1671 static int initio_xfer_data_in(struct initio_host * host)
1672 {
1673     struct scsi_ctrl_blk *scb = host->active;
1674
1675     if ((scb->flags & SCF_DIR) == SCF_DOUT)
1676         return 6;   /* wrong direction */
1677
1678     outl(scb->buflen, host->addr + TUL_SCnt0);
1679     outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1680
1681     if (scb->flags & SCF_SG) {  /* S/G xfer */
1682         outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1683         outl(scb->bufptr, host->addr + TUL_XAddH);
1684         outb(TAX_SG_IN, host->addr + TUL_XCmd);
1685     } else {
1686         outl(scb->buflen, host->addr + TUL_XCntH);
1687         outl(scb->bufptr, host->addr + TUL_XAddH);
1688         outb(TAX_X_IN, host->addr + TUL_XCmd);
1689     }
1690     scb->next_state = 0x5;
1691     return 0;       /* return to OS, wait xfer done , let jas_isr come in */
1692 }
1693
1694 /**
1695  *  initio_xfer_data_out    -   Commence data output
1696  *  @host: InitIO host in use
1697  *
1698  *  Commence a block of data transfer. The transfer itself will
1699  *  be managed by the controller and we will get a completion (or
1700  *  failure) interrupt.
1701  */
1702
1703 static int initio_xfer_data_out(struct initio_host * host)
1704 {
1705     struct scsi_ctrl_blk *scb = host->active;
1706
1707     if ((scb->flags & SCF_DIR) == SCF_DIN)
1708         return 6;   /* wrong direction */
1709
1710     outl(scb->buflen, host->addr + TUL_SCnt0);
1711     outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1712
1713     if (scb->flags & SCF_SG) {  /* S/G xfer */
1714         outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1715         outl(scb->bufptr, host->addr + TUL_XAddH);
1716         outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1717     } else {
1718         outl(scb->buflen, host->addr + TUL_XCntH);
1719         outl(scb->bufptr, host->addr + TUL_XAddH);
1720         outb(TAX_X_OUT, host->addr + TUL_XCmd);
1721     }
1722
1723     scb->next_state = 0x5;
1724     return 0;       /* return to OS, wait xfer done , let jas_isr come in */
1725 }
1726
1727 int initio_xpad_in(struct initio_host * host)
1728 {
1729     struct scsi_ctrl_blk *scb = host->active;
1730     struct target_control *active_tc = host->active_tc;
1731
1732     if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1733         scb->hastat = HOST_DO_DU;   /* over run             */
1734     for (;;) {
1735         if (active_tc->js_period & TSC_WIDE_SCSI)
1736             outl(2, host->addr + TUL_SCnt0);
1737         else
1738             outl(1, host->addr + TUL_SCnt0);
1739
1740         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1741         if (wait_tulip(host) == -1)
1742             return -1;
1743         if (host->phase != DATA_IN) {
1744             outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1745             return 6;
1746         }
1747         inb(host->addr + TUL_SFifo);
1748     }
1749 }
1750
1751 int initio_xpad_out(struct initio_host * host)
1752 {
1753     struct scsi_ctrl_blk *scb = host->active;
1754     struct target_control *active_tc = host->active_tc;
1755
1756     if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1757         scb->hastat = HOST_DO_DU;   /* over run             */
1758     for (;;) {
1759         if (active_tc->js_period & TSC_WIDE_SCSI)
1760             outl(2, host->addr + TUL_SCnt0);
1761         else
1762             outl(1, host->addr + TUL_SCnt0);
1763
1764         outb(0, host->addr + TUL_SFifo);
1765         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1766         if ((wait_tulip(host)) == -1)
1767             return -1;
1768         if (host->phase != DATA_OUT) {  /* Disable wide CPU to allow read 16 bits */
1769             outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1770             outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1771             return 6;
1772         }
1773     }
1774 }
1775
1776 int initio_status_msg(struct initio_host * host)
1777 {               /* status & MSG_IN */
1778     struct scsi_ctrl_blk *scb = host->active;
1779     u8 msg;
1780
1781     outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1782     if (wait_tulip(host) == -1)
1783         return -1;
1784
1785     /* get status */
1786     scb->tastat = inb(host->addr + TUL_SFifo);
1787
1788     if (host->phase == MSG_OUT) {
1789         if (host->jsstatus0 & TSS_PAR_ERROR)
1790             outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1791         else
1792             outb(NOP, host->addr + TUL_SFifo);
1793         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1794         return wait_tulip(host);
1795     }
1796     if (host->phase == MSG_IN) {
1797         msg = inb(host->addr + TUL_SFifo);
1798         if (host->jsstatus0 & TSS_PAR_ERROR) {  /* Parity error                 */
1799             if ((initio_msgin_accept(host)) == -1)
1800                 return -1;
1801             if (host->phase != MSG_OUT)
1802                 return initio_bad_seq(host);
1803             outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1804             outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1805             return wait_tulip(host);
1806         }
1807         if (msg == 0) { /* Command complete             */
1808
1809             if ((scb->tastat & 0x18) == 0x10)   /* No link support              */
1810                 return initio_bad_seq(host);
1811             outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1812             outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1813             return initio_wait_done_disc(host);
1814
1815         }
1816         if (msg == LINKED_CMD_COMPLETE ||
1817             msg == LINKED_FLG_CMD_COMPLETE) {
1818             if ((scb->tastat & 0x18) == 0x10)
1819                 return initio_msgin_accept(host);
1820         }
1821     }
1822     return initio_bad_seq(host);
1823 }
1824
1825
1826 /* scsi bus free */
1827 int int_initio_busfree(struct initio_host * host)
1828 {
1829     struct scsi_ctrl_blk *scb = host->active;
1830
1831     if (scb != NULL) {
1832         if (scb->status & SCB_SELECT) {     /* selection timeout */
1833             initio_unlink_pend_scb(host, scb);
1834             scb->hastat = HOST_SEL_TOUT;
1835             initio_append_done_scb(host, scb);
1836         } else {    /* Unexpected bus free          */
1837             initio_unlink_busy_scb(host, scb);
1838             scb->hastat = HOST_BUS_FREE;
1839             initio_append_done_scb(host, scb);
1840         }
1841         host->active = NULL;
1842         host->active_tc = NULL;
1843     }
1844     outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);      /* Flush SCSI FIFO  */
1845     outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1846     outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect       */
1847     return -1;
1848 }
1849
1850
1851 /**
1852  *  int_initio_scsi_rst -   SCSI reset occurred
1853  *  @host: Host seeing the reset
1854  *
1855  *  A SCSI bus reset has occurred. Clean up any pending transfer
1856  *  the hardware is doing by DMA and then abort all active and
1857  *  disconnected commands. The mid layer should sort the rest out
1858  *  for us
1859  */
1860
1861 static int int_initio_scsi_rst(struct initio_host * host)
1862 {
1863     struct scsi_ctrl_blk *scb;
1864     int i;
1865
1866     /* if DMA xfer is pending, abort DMA xfer */
1867     if (inb(host->addr + TUL_XStatus) & 0x01) {
1868         outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1869         /* wait Abort DMA xfer done */
1870         while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1871             cpu_relax();
1872         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1873     }
1874     /* Abort all active & disconnected scb */
1875     while ((scb = initio_pop_busy_scb(host)) != NULL) {
1876         scb->hastat = HOST_BAD_PHAS;
1877         initio_append_done_scb(host, scb);
1878     }
1879     host->active = NULL;
1880     host->active_tc = NULL;
1881
1882     /* clr sync nego. done flag */
1883     for (i = 0; i < host->max_tar; i++)
1884         host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1885     return -1;
1886 }
1887
1888 /**
1889  *  int_initio_resel    -   Reselection occurred
1890  *  @host: InitIO host adapter
1891  *
1892  *  A SCSI reselection event has been signalled and the interrupt
1893  *  is now being processed. Work out which command block needs attention
1894  *  and continue processing that command.
1895  */
1896
1897 int int_initio_resel(struct initio_host * host)
1898 {
1899     struct scsi_ctrl_blk *scb;
1900     struct target_control *active_tc;
1901     u8 tag, msg = 0;
1902     u8 tar, lun;
1903
1904     if ((scb = host->active) != NULL) {
1905         /* FIXME: Why check and not just clear ? */
1906         if (scb->status & SCB_SELECT)       /* if waiting for selection complete */
1907             scb->status &= ~SCB_SELECT;
1908         host->active = NULL;
1909     }
1910     /* --------- get target id---------------------- */
1911     tar = inb(host->addr + TUL_SBusId);
1912     /* ------ get LUN from Identify message----------- */
1913     lun = inb(host->addr + TUL_SIdent) & 0x0F;
1914     /* 07/22/98 from 0x1F -> 0x0F */
1915     active_tc = &host->targets[tar];
1916     host->active_tc = active_tc;
1917     outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1918     outb(active_tc->js_period, host->addr + TUL_SPeriod);
1919
1920     /* ------------- tag queueing ? ------------------- */
1921     if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1922         if ((initio_msgin_accept(host)) == -1)
1923             return -1;
1924         if (host->phase != MSG_IN)
1925             goto no_tag;
1926         outl(1, host->addr + TUL_SCnt0);
1927         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1928         if (wait_tulip(host) == -1)
1929             return -1;
1930         msg = inb(host->addr + TUL_SFifo);  /* Read Tag Message    */
1931
1932         if (msg < SIMPLE_QUEUE_TAG || msg > ORDERED_QUEUE_TAG)
1933             /* Is simple Tag      */
1934             goto no_tag;
1935
1936         if (initio_msgin_accept(host) == -1)
1937             return -1;
1938
1939         if (host->phase != MSG_IN)
1940             goto no_tag;
1941
1942         outl(1, host->addr + TUL_SCnt0);
1943         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1944         if (wait_tulip(host) == -1)
1945             return -1;
1946         tag = inb(host->addr + TUL_SFifo);  /* Read Tag ID       */
1947         scb = host->scb + tag;
1948         if (scb->target != tar || scb->lun != lun) {
1949             return initio_msgout_abort_tag(host);
1950         }
1951         if (scb->status != SCB_BUSY) {  /* 03/24/95             */
1952             return initio_msgout_abort_tag(host);
1953         }
1954         host->active = scb;
1955         if ((initio_msgin_accept(host)) == -1)
1956             return -1;
1957     } else {        /* No tag               */
1958           no_tag:
1959         if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1960             return initio_msgout_abort_targ(host);
1961         }
1962         host->active = scb;
1963         if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1964             if ((initio_msgin_accept(host)) == -1)
1965                 return -1;
1966         }
1967     }
1968     return 0;
1969 }
1970
1971 /**
1972  *  int_initio_bad_seq      -   out of phase
1973  *  @host: InitIO host flagging event
1974  *
1975  *  We have ended up out of phase somehow. Reset the host controller
1976  *  and throw all our toys out of the pram. Let the midlayer clean up
1977  */
1978
1979 static int int_initio_bad_seq(struct initio_host * host)
1980 {               /* target wrong phase           */
1981     struct scsi_ctrl_blk *scb;
1982     int i;
1983
1984     initio_reset_scsi(host, 10);
1985
1986     while ((scb = initio_pop_busy_scb(host)) != NULL) {
1987         scb->hastat = HOST_BAD_PHAS;
1988         initio_append_done_scb(host, scb);
1989     }
1990     for (i = 0; i < host->max_tar; i++)
1991         host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1992     return -1;
1993 }
1994
1995
1996 /**
1997  *  initio_msgout_abort_targ        -   abort a tag
1998  *  @host: InitIO host
1999  *
2000  *  Abort when the target/lun does not match or when our SCB is not
2001  *  busy. Used by untagged commands.
2002  */
2003
2004 static int initio_msgout_abort_targ(struct initio_host * host)
2005 {
2006
2007     outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2008     if (initio_msgin_accept(host) == -1)
2009         return -1;
2010     if (host->phase != MSG_OUT)
2011         return initio_bad_seq(host);
2012
2013     outb(ABORT_TASK_SET, host->addr + TUL_SFifo);
2014     outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2015
2016     return initio_wait_disc(host);
2017 }
2018
2019 /**
2020  *  initio_msgout_abort_tag     -   abort a tag
2021  *  @host: InitIO host
2022  *
2023  *  Abort when the target/lun does not match or when our SCB is not
2024  *  busy. Used for tagged commands.
2025  */
2026
2027 static int initio_msgout_abort_tag(struct initio_host * host)
2028 {
2029
2030     outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2031     if (initio_msgin_accept(host) == -1)
2032         return -1;
2033     if (host->phase != MSG_OUT)
2034         return initio_bad_seq(host);
2035
2036     outb(ABORT_TASK, host->addr + TUL_SFifo);
2037     outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2038
2039     return initio_wait_disc(host);
2040
2041 }
2042
2043 /**
2044  *  initio_msgin        -   Message in
2045  *  @host: InitIO Host
2046  *
2047  *  Process incoming message
2048  */
2049 static int initio_msgin(struct initio_host * host)
2050 {
2051     struct target_control *active_tc;
2052
2053     for (;;) {
2054         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2055
2056         outl(1, host->addr + TUL_SCnt0);
2057         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2058         if (wait_tulip(host) == -1)
2059             return -1;
2060
2061         switch (inb(host->addr + TUL_SFifo)) {
2062         case DISCONNECT:    /* Disconnect msg */
2063             outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2064             return initio_wait_disc(host);
2065         case SAVE_POINTERS:
2066         case RESTORE_POINTERS:
2067         case NOP:
2068             initio_msgin_accept(host);
2069             break;
2070         case MESSAGE_REJECT:    /* Clear ATN first              */
2071             outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2072                 host->addr + TUL_SSignal);
2073             active_tc = host->active_tc;
2074             if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)   /* do sync nego */
2075                 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2076                     host->addr + TUL_SSignal);
2077             initio_msgin_accept(host);
2078             break;
2079         case EXTENDED_MESSAGE:  /* extended msg */
2080             initio_msgin_extend(host);
2081             break;
2082         case IGNORE_WIDE_RESIDUE:
2083             initio_msgin_accept(host);
2084             break;
2085         case COMMAND_COMPLETE:
2086             outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2087             outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2088             return initio_wait_done_disc(host);
2089         default:
2090             initio_msgout_reject(host);
2091             break;
2092         }
2093         if (host->phase != MSG_IN)
2094             return host->phase;
2095     }
2096     /* statement won't reach here */
2097 }
2098
2099 static int initio_msgout_reject(struct initio_host * host)
2100 {
2101     outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2102
2103     if (initio_msgin_accept(host) == -1)
2104         return -1;
2105
2106     if (host->phase == MSG_OUT) {
2107         outb(MESSAGE_REJECT, host->addr + TUL_SFifo);       /* Msg reject           */
2108         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2109         return wait_tulip(host);
2110     }
2111     return host->phase;
2112 }
2113
2114 static int initio_msgout_ide(struct initio_host * host)
2115 {
2116     outb(INITIATOR_ERROR, host->addr + TUL_SFifo);      /* Initiator Detected Error */
2117     outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2118     return wait_tulip(host);
2119 }
2120
2121 static int initio_msgin_extend(struct initio_host * host)
2122 {
2123     u8 len, idx;
2124
2125     if (initio_msgin_accept(host) != MSG_IN)
2126         return host->phase;
2127
2128     /* Get extended msg length      */
2129     outl(1, host->addr + TUL_SCnt0);
2130     outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2131     if (wait_tulip(host) == -1)
2132         return -1;
2133
2134     len = inb(host->addr + TUL_SFifo);
2135     host->msg[0] = len;
2136     for (idx = 1; len != 0; len--) {
2137
2138         if ((initio_msgin_accept(host)) != MSG_IN)
2139             return host->phase;
2140         outl(1, host->addr + TUL_SCnt0);
2141         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2142         if (wait_tulip(host) == -1)
2143             return -1;
2144         host->msg[idx++] = inb(host->addr + TUL_SFifo);
2145     }
2146     if (host->msg[1] == 1) {        /* if it's synchronous data transfer request */
2147         u8 r;
2148         if (host->msg[0] != 3)  /* if length is not right */
2149             return initio_msgout_reject(host);
2150         if (host->active_tc->flags & TCF_NO_SYNC_NEGO) {    /* Set OFFSET=0 to do async, nego back */
2151             host->msg[3] = 0;
2152         } else {
2153             if (initio_msgin_sync(host) == 0 &&
2154                 (host->active_tc->flags & TCF_SYNC_DONE)) {
2155                 initio_sync_done(host);
2156                 return initio_msgin_accept(host);
2157             }
2158         }
2159
2160         r = inb(host->addr + TUL_SSignal);
2161         outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2162             host->addr + TUL_SSignal);
2163         if (initio_msgin_accept(host) != MSG_OUT)
2164             return host->phase;
2165         /* sync msg out */
2166         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2167
2168         initio_sync_done(host);
2169
2170         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2171         outb(3, host->addr + TUL_SFifo);
2172         outb(EXTENDED_SDTR, host->addr + TUL_SFifo);
2173         outb(host->msg[2], host->addr + TUL_SFifo);
2174         outb(host->msg[3], host->addr + TUL_SFifo);
2175         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2176         return wait_tulip(host);
2177     }
2178     if (host->msg[0] != 2 || host->msg[1] != 3)
2179         return initio_msgout_reject(host);
2180     /* if it's WIDE DATA XFER REQ   */
2181     if (host->active_tc->flags & TCF_NO_WDTR) {
2182         host->msg[2] = 0;
2183     } else {
2184         if (host->msg[2] > 2)   /* > 32 bits            */
2185             return initio_msgout_reject(host);
2186         if (host->msg[2] == 2) {        /* == 32                */
2187             host->msg[2] = 1;
2188         } else {
2189             if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2190                 wdtr_done(host);
2191                 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2192                     outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2193                 return initio_msgin_accept(host);
2194             }
2195         }
2196     }
2197     outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2198
2199     if (initio_msgin_accept(host) != MSG_OUT)
2200         return host->phase;
2201     /* WDTR msg out                 */
2202     outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2203     outb(2, host->addr + TUL_SFifo);
2204     outb(EXTENDED_WDTR, host->addr + TUL_SFifo);
2205     outb(host->msg[2], host->addr + TUL_SFifo);
2206     outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2207     return wait_tulip(host);
2208 }
2209
2210 static int initio_msgin_sync(struct initio_host * host)
2211 {
2212     char default_period;
2213
2214     default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2215     if (host->msg[3] > MAX_OFFSET) {
2216         host->msg[3] = MAX_OFFSET;
2217         if (host->msg[2] < default_period) {
2218             host->msg[2] = default_period;
2219             return 1;
2220         }
2221         if (host->msg[2] >= 59) /* Change to async              */
2222             host->msg[3] = 0;
2223         return 1;
2224     }
2225     /* offset requests asynchronous transfers ? */
2226     if (host->msg[3] == 0) {
2227         return 0;
2228     }
2229     if (host->msg[2] < default_period) {
2230         host->msg[2] = default_period;
2231         return 1;
2232     }
2233     if (host->msg[2] >= 59) {
2234         host->msg[3] = 0;
2235         return 1;
2236     }
2237     return 0;
2238 }
2239
2240 static int wdtr_done(struct initio_host * host)
2241 {
2242     host->active_tc->flags &= ~TCF_SYNC_DONE;
2243     host->active_tc->flags |= TCF_WDTR_DONE;
2244
2245     host->active_tc->js_period = 0;
2246     if (host->msg[2])   /* if 16 bit */
2247         host->active_tc->js_period |= TSC_WIDE_SCSI;
2248     host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2249     outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2250     outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2251
2252     return 1;
2253 }
2254
2255 static int initio_sync_done(struct initio_host * host)
2256 {
2257     int i;
2258
2259     host->active_tc->flags |= TCF_SYNC_DONE;
2260
2261     if (host->msg[3]) {
2262         host->active_tc->js_period |= host->msg[3];
2263         for (i = 0; i < 8; i++) {
2264             if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2265                 break;
2266         }
2267         host->active_tc->js_period |= (i << 4);
2268         host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2269     }
2270     outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2271     outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2272
2273     return -1;
2274 }
2275
2276
2277 static int initio_post_scsi_rst(struct initio_host * host)
2278 {
2279     struct scsi_ctrl_blk *scb;
2280     struct target_control *active_tc;
2281     int i;
2282
2283     host->active = NULL;
2284     host->active_tc = NULL;
2285     host->flags = 0;
2286
2287     while ((scb = initio_pop_busy_scb(host)) != NULL) {
2288         scb->hastat = HOST_BAD_PHAS;
2289         initio_append_done_scb(host, scb);
2290     }
2291     /* clear sync done flag         */
2292     active_tc = &host->targets[0];
2293     for (i = 0; i < host->max_tar; active_tc++, i++) {
2294         active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2295         /* Initialize the sync. xfer register values to an asyn xfer */
2296         active_tc->js_period = 0;
2297         active_tc->sconfig0 = host->sconf1;
2298         host->act_tags[0] = 0;  /* 07/22/98 */
2299         host->targets[i].flags &= ~TCF_BUSY;    /* 07/22/98 */
2300     }           /* for */
2301
2302     return -1;
2303 }
2304
2305 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2306 {
2307     scb->status |= SCB_SELECT;
2308     scb->next_state = 0x1;
2309     host->active = scb;
2310     host->active_tc = &host->targets[scb->target];
2311     outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2312 }
2313
2314
2315 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2316 {
2317     int i;
2318
2319     scb->status |= SCB_SELECT;
2320     scb->next_state = 0x2;
2321
2322     outb(scb->ident, host->addr + TUL_SFifo);
2323     for (i = 0; i < (int) scb->cdblen; i++)
2324         outb(scb->cdb[i], host->addr + TUL_SFifo);
2325     host->active_tc = &host->targets[scb->target];
2326     host->active = scb;
2327     outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2328 }
2329
2330 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2331 {
2332     int i;
2333
2334     scb->status |= SCB_SELECT;
2335     scb->next_state = 0x2;
2336
2337     outb(scb->ident, host->addr + TUL_SFifo);
2338     outb(scb->tagmsg, host->addr + TUL_SFifo);
2339     outb(scb->tagid, host->addr + TUL_SFifo);
2340     for (i = 0; i < scb->cdblen; i++)
2341         outb(scb->cdb[i], host->addr + TUL_SFifo);
2342     host->active_tc = &host->targets[scb->target];
2343     host->active = scb;
2344     outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2345 }
2346
2347 /**
2348  *  initio_bus_device_reset -    SCSI Bus Device Reset
2349  *  @host: InitIO host to reset
2350  *
2351  *  Perform a device reset and abort all pending SCBs for the
2352  *  victim device
2353  */
2354 int initio_bus_device_reset(struct initio_host * host)
2355 {
2356     struct scsi_ctrl_blk *scb = host->active;
2357     struct target_control *active_tc = host->active_tc;
2358     struct scsi_ctrl_blk *tmp, *prev;
2359     u8 tar;
2360
2361     if (host->phase != MSG_OUT)
2362         return int_initio_bad_seq(host);    /* Unexpected phase */
2363
2364     initio_unlink_pend_scb(host, scb);
2365     initio_release_scb(host, scb);
2366
2367
2368     tar = scb->target;  /* target                       */
2369     active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2370     /* clr sync. nego & WDTR flags  07/22/98 */
2371
2372     /* abort all SCB with same target */
2373     prev = tmp = host->first_busy;  /* Check Busy queue */
2374     while (tmp != NULL) {
2375         if (tmp->target == tar) {
2376             /* unlink it */
2377             if (tmp == host->first_busy) {
2378                 if ((host->first_busy = tmp->next) == NULL)
2379                     host->last_busy = NULL;
2380             } else {
2381                 prev->next = tmp->next;
2382                 if (tmp == host->last_busy)
2383                     host->last_busy = prev;
2384             }
2385             tmp->hastat = HOST_ABORTED;
2386             initio_append_done_scb(host, tmp);
2387         }
2388         /* Previous haven't change      */
2389         else {
2390             prev = tmp;
2391         }
2392         tmp = tmp->next;
2393     }
2394     outb(TARGET_RESET, host->addr + TUL_SFifo);
2395     outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2396     return initio_wait_disc(host);
2397
2398 }
2399
2400 static int initio_msgin_accept(struct initio_host * host)
2401 {
2402     outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2403     return wait_tulip(host);
2404 }
2405
2406 static int wait_tulip(struct initio_host * host)
2407 {
2408
2409     while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2410          & TSS_INT_PENDING))
2411             cpu_relax();
2412
2413     host->jsint = inb(host->addr + TUL_SInt);
2414     host->phase = host->jsstatus0 & TSS_PH_MASK;
2415     host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2416
2417     if (host->jsint & TSS_RESEL_INT)    /* if SCSI bus reset detected */
2418         return int_initio_resel(host);
2419     if (host->jsint & TSS_SEL_TIMEOUT)  /* if selected/reselected timeout interrupt */
2420         return int_initio_busfree(host);
2421     if (host->jsint & TSS_SCSIRST_INT)  /* if SCSI bus reset detected   */
2422         return int_initio_scsi_rst(host);
2423
2424     if (host->jsint & TSS_DISC_INT) {   /* BUS disconnection            */
2425         if (host->flags & HCF_EXPECT_DONE_DISC) {
2426             outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2427             initio_unlink_busy_scb(host, host->active);
2428             host->active->hastat = 0;
2429             initio_append_done_scb(host, host->active);
2430             host->active = NULL;
2431             host->active_tc = NULL;
2432             host->flags &= ~HCF_EXPECT_DONE_DISC;
2433             outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2434             outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2435             return -1;
2436         }
2437         if (host->flags & HCF_EXPECT_DISC) {
2438             outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2439             host->active = NULL;
2440             host->active_tc = NULL;
2441             host->flags &= ~HCF_EXPECT_DISC;
2442             outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2443             outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2444             return -1;
2445         }
2446         return int_initio_busfree(host);
2447     }
2448     /* The old code really does the below. Can probably be removed */
2449     if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2450         return host->phase;
2451     return host->phase;
2452 }
2453
2454 static int initio_wait_disc(struct initio_host * host)
2455 {
2456     while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2457         cpu_relax();
2458
2459     host->jsint = inb(host->addr + TUL_SInt);
2460
2461     if (host->jsint & TSS_SCSIRST_INT)  /* if SCSI bus reset detected */
2462         return int_initio_scsi_rst(host);
2463     if (host->jsint & TSS_DISC_INT) {   /* BUS disconnection */
2464         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2465         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2466         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2467         host->active = NULL;
2468         return -1;
2469     }
2470     return initio_bad_seq(host);
2471 }
2472
2473 static int initio_wait_done_disc(struct initio_host * host)
2474 {
2475     while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2476          & TSS_INT_PENDING))
2477          cpu_relax();
2478
2479     host->jsint = inb(host->addr + TUL_SInt);
2480
2481     if (host->jsint & TSS_SCSIRST_INT)  /* if SCSI bus reset detected */
2482         return int_initio_scsi_rst(host);
2483     if (host->jsint & TSS_DISC_INT) {   /* BUS disconnection */
2484         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);      /* Flush SCSI FIFO */
2485         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2486         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);     /* Enable HW reselect */
2487         initio_unlink_busy_scb(host, host->active);
2488
2489         initio_append_done_scb(host, host->active);
2490         host->active = NULL;
2491         return -1;
2492     }
2493     return initio_bad_seq(host);
2494 }
2495
2496 /**
2497  *  i91u_intr       -   IRQ handler
2498  *  @irqno: IRQ number
2499  *  @dev_id: IRQ identifier
2500  *
2501  *  Take the relevant locks and then invoke the actual isr processing
2502  *  code under the lock.
2503  */
2504
2505 static irqreturn_t i91u_intr(int irqno, void *dev_id)
2506 {
2507     struct Scsi_Host *dev = dev_id;
2508     unsigned long flags;
2509     int r;
2510
2511     spin_lock_irqsave(dev->host_lock, flags);
2512     r = initio_isr((struct initio_host *)dev->hostdata);
2513     spin_unlock_irqrestore(dev->host_lock, flags);
2514     if (r)
2515         return IRQ_HANDLED;
2516     else
2517         return IRQ_NONE;
2518 }
2519
2520
2521 /**
2522  *  initio_build_scb        -   Build the mappings and SCB
2523  *  @host: InitIO host taking the command
2524  *  @cblk: Firmware command block
2525  *  @cmnd: SCSI midlayer command block
2526  *
2527  *  Translate the abstract SCSI command into a firmware command block
2528  *  suitable for feeding to the InitIO host controller. This also requires
2529  *  we build the scatter gather lists and ensure they are mapped properly.
2530  */
2531
2532 static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2533 {               /* Create corresponding SCB     */
2534     struct scatterlist *sglist;
2535     struct sg_entry *sg;        /* Pointer to SG list           */
2536     int i, nseg;
2537     long total_len;
2538     dma_addr_t dma_addr;
2539
2540     /* Fill in the command headers */
2541     cblk->post = i91uSCBPost;   /* i91u's callback routine      */
2542     cblk->srb = cmnd;
2543     cblk->opcode = ExecSCSI;
2544     cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2545     cblk->target = cmnd->device->id;
2546     cblk->lun = cmnd->device->lun;
2547     cblk->ident = cmnd->device->lun | DISC_ALLOW;
2548
2549     cblk->flags |= SCF_SENSE;   /* Turn on auto request sense   */
2550
2551     /* Map the sense buffer into bus memory */
2552     dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2553                   SENSE_SIZE, DMA_FROM_DEVICE);
2554     cblk->senseptr = (u32)dma_addr;
2555     cblk->senselen = SENSE_SIZE;
2556     initio_priv(cmnd)->sense_dma_addr = dma_addr;
2557     cblk->cdblen = cmnd->cmd_len;
2558
2559     /* Clear the returned status */
2560     cblk->hastat = 0;
2561     cblk->tastat = 0;
2562     /* Command the command */
2563     memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2564
2565     /* Set up tags */
2566     if (cmnd->device->tagged_supported) {   /* Tag Support                  */
2567         cblk->tagmsg = SIMPLE_QUEUE_TAG;    /* Do simple tag only   */
2568     } else {
2569         cblk->tagmsg = 0;   /* No tag support               */
2570     }
2571
2572     /* todo handle map_sg error */
2573     nseg = scsi_dma_map(cmnd);
2574     BUG_ON(nseg < 0);
2575     if (nseg) {
2576         dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2577                       sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2578                       DMA_BIDIRECTIONAL);
2579         cblk->bufptr = (u32)dma_addr;
2580         initio_priv(cmnd)->sglist_dma_addr = dma_addr;
2581
2582         cblk->sglen = nseg;
2583
2584         cblk->flags |= SCF_SG;  /* Turn on SG list flag       */
2585         total_len = 0;
2586         sg = &cblk->sglist[0];
2587         scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2588             sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2589             sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2590             total_len += sg_dma_len(sglist);
2591             ++sg;
2592         }
2593
2594         cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2595             total_len : scsi_bufflen(cmnd);
2596     } else {    /* No data transfer required */
2597         cblk->buflen = 0;
2598         cblk->sglen = 0;
2599     }
2600 }
2601
2602 /**
2603  *  i91u_queuecommand_lck   -   Queue a new command if possible
2604  *  @cmd: SCSI command block from the mid layer
2605  *
2606  *  Attempts to queue a new command with the host adapter. Will return
2607  *  zero if successful or indicate a host busy condition if not (which
2608  *  will cause the mid layer to call us again later with the command)
2609  */
2610 static int i91u_queuecommand_lck(struct scsi_cmnd *cmd)
2611 {
2612     struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2613     struct scsi_ctrl_blk *cmnd;
2614
2615     cmnd = initio_alloc_scb(host);
2616     if (!cmnd)
2617         return SCSI_MLQUEUE_HOST_BUSY;
2618
2619     initio_build_scb(host, cmnd, cmd);
2620     initio_exec_scb(host, cmnd);
2621     return 0;
2622 }
2623
2624 static DEF_SCSI_QCMD(i91u_queuecommand)
2625
2626 /**
2627  *  i91u_bus_reset      -   reset the SCSI bus
2628  *  @cmnd: Command block we want to trigger the reset for
2629  *
2630  *  Initiate a SCSI bus reset sequence
2631  */
2632
2633 static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2634 {
2635     struct initio_host *host;
2636
2637     host = (struct initio_host *) cmnd->device->host->hostdata;
2638
2639     spin_lock_irq(cmnd->device->host->host_lock);
2640     initio_reset_scsi(host, 0);
2641     spin_unlock_irq(cmnd->device->host->host_lock);
2642
2643     return SUCCESS;
2644 }
2645
2646 /**
2647  *  i91u_biosparam          -   return the "logical geometry
2648  *  @sdev: SCSI device
2649  *  @dev: Matching block device
2650  *  @capacity: Sector size of drive
2651  *  @info_array: Return space for BIOS geometry
2652  *
2653  *  Map the device geometry in a manner compatible with the host
2654  *  controller BIOS behaviour.
2655  *
2656  *  FIXME: limited to 2^32 sector devices.
2657  */
2658
2659 static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2660         sector_t capacity, int *info_array)
2661 {
2662     struct initio_host *host;       /* Point to Host adapter control block */
2663     struct target_control *tc;
2664
2665     host = (struct initio_host *) sdev->host->hostdata;
2666     tc = &host->targets[sdev->id];
2667
2668     if (tc->heads) {
2669         info_array[0] = tc->heads;
2670         info_array[1] = tc->sectors;
2671         info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2672     } else {
2673         if (tc->drv_flags & TCF_DRV_255_63) {
2674             info_array[0] = 255;
2675             info_array[1] = 63;
2676             info_array[2] = (unsigned long)capacity / 255 / 63;
2677         } else {
2678             info_array[0] = 64;
2679             info_array[1] = 32;
2680             info_array[2] = (unsigned long)capacity >> 11;
2681         }
2682     }
2683
2684 #if defined(DEBUG_BIOSPARAM)
2685     if (i91u_debug & debug_biosparam) {
2686         printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2687                info_array[0], info_array[1], info_array[2]);
2688         printk("WARNING: check, if the bios geometry is correct.\n");
2689     }
2690 #endif
2691
2692     return 0;
2693 }
2694
2695 /**
2696  *  i91u_unmap_scb      -   Unmap a command
2697  *  @pci_dev: PCI device the command is for
2698  *  @cmnd: The command itself
2699  *
2700  *  Unmap any PCI mapping/IOMMU resources allocated when the command
2701  *  was mapped originally as part of initio_build_scb
2702  */
2703
2704 static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2705 {
2706     /* auto sense buffer */
2707     if (initio_priv(cmnd)->sense_dma_addr) {
2708         dma_unmap_single(&pci_dev->dev,
2709                  initio_priv(cmnd)->sense_dma_addr,
2710                  SENSE_SIZE, DMA_FROM_DEVICE);
2711         initio_priv(cmnd)->sense_dma_addr = 0;
2712     }
2713
2714     /* request buffer */
2715     if (scsi_sg_count(cmnd)) {
2716         dma_unmap_single(&pci_dev->dev,
2717                  initio_priv(cmnd)->sglist_dma_addr,
2718                  sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2719                  DMA_BIDIRECTIONAL);
2720
2721         scsi_dma_unmap(cmnd);
2722     }
2723 }
2724
2725 /*
2726  *  i91uSCBPost     -   SCSI callback
2727  *
2728  *  This is callback routine be called when tulip finish one
2729  *  SCSI command.
2730  */
2731
2732 static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2733 {
2734     struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2735     struct initio_host *host;
2736     struct scsi_ctrl_blk *cblk;
2737
2738     host = (struct initio_host *) host_mem;
2739     cblk = (struct scsi_ctrl_blk *) cblk_mem;
2740     if ((cmnd = cblk->srb) == NULL) {
2741         printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2742         WARN_ON(1);
2743         initio_release_scb(host, cblk); /* Release SCB for current channel */
2744         return;
2745     }
2746
2747     /*
2748      *  Remap the firmware error status into a mid layer one
2749      */
2750     switch (cblk->hastat) {
2751     case 0x0:
2752     case 0xa:       /* Linked command complete without error and linked normally */
2753     case 0xb:       /* Linked command complete without error interrupt generated */
2754         cblk->hastat = 0;
2755         break;
2756
2757     case 0x11:      /* Selection time out-The initiator selection or target
2758                    reselection was not complete within the SCSI Time out period */
2759         cblk->hastat = DID_TIME_OUT;
2760         break;
2761
2762     case 0x14:      /* Target bus phase sequence failure-An invalid bus phase or bus
2763                    phase sequence was requested by the target. The host adapter
2764                    will generate a SCSI Reset Condition, notifying the host with
2765                    a SCRD interrupt */
2766         cblk->hastat = DID_RESET;
2767         break;
2768
2769     case 0x1a:      /* SCB Aborted. 07/21/98 */
2770         cblk->hastat = DID_ABORT;
2771         break;
2772
2773     case 0x12:      /* Data overrun/underrun-The target attempted to transfer more data
2774                    than was allocated by the Data Length field or the sum of the
2775                    Scatter / Gather Data Length fields. */
2776     case 0x13:      /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2777     case 0x16:      /* Invalid SCB Operation Code. */
2778
2779     default:
2780         printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2781         cblk->hastat = DID_ERROR;   /* Couldn't find any better */
2782         break;
2783     }
2784
2785     cmnd->result = cblk->tastat | (cblk->hastat << 16);
2786     i91u_unmap_scb(host->pci_dev, cmnd);
2787     scsi_done(cmnd);    /* Notify system DONE           */
2788     initio_release_scb(host, cblk); /* Release SCB for current channel */
2789 }
2790
2791 static struct scsi_host_template initio_template = {
2792     .proc_name      = "INI9100U",
2793     .name           = "Initio INI-9X00U/UW SCSI device driver",
2794     .queuecommand       = i91u_queuecommand,
2795     .eh_bus_reset_handler   = i91u_bus_reset,
2796     .bios_param     = i91u_biosparam,
2797     .can_queue      = MAX_TARGETS * i91u_MAXQUEUE,
2798     .this_id        = 1,
2799     .sg_tablesize       = SG_ALL,
2800     .cmd_size       = sizeof(struct initio_cmd_priv),
2801 };
2802
2803 static int initio_probe_one(struct pci_dev *pdev,
2804     const struct pci_device_id *id)
2805 {
2806     struct Scsi_Host *shost;
2807     struct initio_host *host;
2808     u32 reg;
2809     u16 bios_seg;
2810     struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2811     int num_scb, i, error;
2812
2813     error = pci_enable_device(pdev);
2814     if (error)
2815         return error;
2816
2817     pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2818     bios_seg = (u16) (reg & 0xFF);
2819     if (((reg & 0xFF00) >> 8) == 0xFF)
2820         reg = 0;
2821     bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2822
2823     if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2824         printk(KERN_WARNING  "i91u: Could not set 32 bit DMA mask\n");
2825         error = -ENODEV;
2826         goto out_disable_device;
2827     }
2828     shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2829     if (!shost) {
2830         printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2831         error = -ENOMEM;
2832         goto out_disable_device;
2833     }
2834     host = (struct initio_host *)shost->hostdata;
2835     memset(host, 0, sizeof(struct initio_host));
2836     host->addr = pci_resource_start(pdev, 0);
2837     host->bios_addr = bios_seg;
2838
2839     if (!request_region(host->addr, 256, "i91u")) {
2840         printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2841         error = -ENODEV;
2842         goto out_host_put;
2843     }
2844
2845     if (initio_tag_enable)  /* 1.01i */
2846         num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2847     else
2848         num_scb = MAX_TARGETS + 3;  /* 1-tape, 1-CD_ROM, 1- extra */
2849
2850     for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2851         i = num_scb * sizeof(struct scsi_ctrl_blk);
2852         scb = kzalloc(i, GFP_KERNEL);
2853         if (scb)
2854             break;
2855     }
2856
2857     if (!scb) {
2858         printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2859         error = -ENOMEM;
2860         goto out_release_region;
2861     }
2862
2863     host->pci_dev = pdev;
2864
2865     host->semaph = 1;
2866     spin_lock_init(&host->semaph_lock);
2867     host->num_scbs = num_scb;
2868     host->scb = scb;
2869     host->next_pending = scb;
2870     host->next_avail = scb;
2871     for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2872         tmp->tagid = i;
2873         if (i != 0)
2874             prev->next = tmp;
2875         prev = tmp;
2876     }
2877     prev->next = NULL;
2878     host->scb_end = tmp;
2879     host->first_avail = scb;
2880     host->last_avail = prev;
2881     spin_lock_init(&host->avail_lock);
2882
2883     initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2884
2885     host->jsstatus0 = 0;
2886
2887     shost->io_port = host->addr;
2888     shost->n_io_port = 0xff;
2889     shost->can_queue = num_scb;     /* 03/05/98                      */
2890     shost->unique_id = host->addr;
2891     shost->max_id = host->max_tar;
2892     shost->max_lun = 32;    /* 10/21/97                     */
2893     shost->irq = pdev->irq;
2894     shost->this_id = host->scsi_id; /* Assign HCS index           */
2895     shost->base = host->addr;
2896     shost->sg_tablesize = TOTAL_SG_ENTRY;
2897
2898     error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2899     if (error < 0) {
2900         printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2901         goto out_free_scbs;
2902     }
2903
2904     pci_set_drvdata(pdev, shost);
2905
2906     error = scsi_add_host(shost, &pdev->dev);
2907     if (error)
2908         goto out_free_irq;
2909     scsi_scan_host(shost);
2910     return 0;
2911 out_free_irq:
2912     free_irq(pdev->irq, shost);
2913 out_free_scbs:
2914     kfree(host->scb);
2915 out_release_region:
2916     release_region(host->addr, 256);
2917 out_host_put:
2918     scsi_host_put(shost);
2919 out_disable_device:
2920     pci_disable_device(pdev);
2921     return error;
2922 }
2923
2924 /**
2925  *  initio_remove_one   -   control shutdown
2926  *  @pdev:  PCI device being released
2927  *
2928  *  Release the resources assigned to this adapter after it has
2929  *  finished being used.
2930  */
2931
2932 static void initio_remove_one(struct pci_dev *pdev)
2933 {
2934     struct Scsi_Host *host = pci_get_drvdata(pdev);
2935     struct initio_host *s = (struct initio_host *)host->hostdata;
2936     scsi_remove_host(host);
2937     free_irq(pdev->irq, host);
2938     release_region(s->addr, 256);
2939     scsi_host_put(host);
2940     pci_disable_device(pdev);
2941 }
2942
2943 MODULE_LICENSE("GPL");
2944
2945 static struct pci_device_id initio_pci_tbl[] = {
2946     {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2947     {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2948     {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2949     {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2950     {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2951     {0,}
2952 };
2953 MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2954
2955 static struct pci_driver initio_pci_driver = {
2956     .name       = "initio",
2957     .id_table   = initio_pci_tbl,
2958     .probe      = initio_probe_one,
2959     .remove     = initio_remove_one,
2960 };
2961 module_pci_driver(initio_pci_driver);
2962
2963 MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2964 MODULE_AUTHOR("Initio Corporation");
2965 MODULE_LICENSE("GPL");