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Diffstat (limited to 'linux/src/drivers/scsi/fdomain.c')
| -rw-r--r-- | linux/src/drivers/scsi/fdomain.c | 2082 |
1 files changed, 2082 insertions, 0 deletions
diff --git a/linux/src/drivers/scsi/fdomain.c b/linux/src/drivers/scsi/fdomain.c new file mode 100644 index 0000000..df71f5c --- /dev/null +++ b/linux/src/drivers/scsi/fdomain.c @@ -0,0 +1,2082 @@ +/* fdomain.c -- Future Domain TMC-16x0 SCSI driver + * Created: Sun May 3 18:53:19 1992 by faith@cs.unc.edu + * Revised: Sat Nov 2 09:27:47 1996 by root@cs.unc.edu + * Author: Rickard E. Faith, faith@cs.unc.edu + * Copyright 1992, 1993, 1994, 1995, 1996 Rickard E. Faith + * + * $Id: fdomain.c,v 1.1 1999/04/26 05:54:32 tb Exp $ + + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + + ************************************************************************** + + SUMMARY: + + Future Domain BIOS versions supported for autodetect: + 2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61 + Chips are supported: + TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70 + Boards supported: + Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX + Future Domain TMC-3260 (PCI) + Quantum ISA-200S, ISA-250MG + Adaptec AHA-2920 (PCI) + IBM ? + LILO command-line options: + fdomain=<PORT_BASE>,<IRQ>[,<ADAPTER_ID>] + + + + DESCRIPTION: + + This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680 + TMC-1650/1670, and TMC-3260 SCSI host adapters. The 1650 and 1670 have a + 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin + high-density external connector. The 1670 and 1680 have floppy disk + controllers built in. The TMC-3260 is a PCI bus card. + + Future Domain's older boards are based on the TMC-1800 chip, and this + driver was originally written for a TMC-1680 board with the TMC-1800 chip. + More recently, boards are being produced with the TMC-18C50 and TMC-18C30 + chips. The latest and greatest board may not work with this driver. If + you have to patch this driver so that it will recognize your board's BIOS + signature, then the driver may fail to function after the board is + detected. + + Please note that the drive ordering that Future Domain implemented in BIOS + versions 3.4 and 3.5 is the opposite of the order (currently) used by the + rest of the SCSI industry. If you have BIOS version 3.4 or 3.5, and have + more then one drive, then the drive ordering will be the reverse of that + which you see under DOS. For example, under DOS SCSI ID 0 will be D: and + SCSI ID 1 will be C: (the boot device). Under Linux, SCSI ID 0 will be + /dev/sda and SCSI ID 1 will be /dev/sdb. The Linux ordering is consistent + with that provided by all the other SCSI drivers for Linux. If you want + this changed, you will probably have to patch the higher level SCSI code. + If you do so, please send me patches that are protected by #ifdefs. + + If you have a TMC-8xx or TMC-9xx board, then this is not the driver for + your board. Please refer to the Seagate driver for more information and + possible support. + + + + HISTORY: + + Linux Driver Driver + Version Version Date Support/Notes + + 0.0 3 May 1992 V2.0 BIOS; 1800 chip + 0.97 1.9 28 Jul 1992 + 0.98.6 3.1 27 Nov 1992 + 0.99 3.2 9 Dec 1992 + + 0.99.3 3.3 10 Jan 1993 V3.0 BIOS + 0.99.5 3.5 18 Feb 1993 + 0.99.10 3.6 15 May 1993 V3.2 BIOS; 18C50 chip + 0.99.11 3.17 3 Jul 1993 (now under RCS) + 0.99.12 3.18 13 Aug 1993 + 0.99.14 5.6 31 Oct 1993 (reselection code removed) + + 0.99.15 5.9 23 Jan 1994 V3.4 BIOS (preliminary) + 1.0.8/1.1.1 5.15 1 Apr 1994 V3.4 BIOS; 18C30 chip (preliminary) + 1.0.9/1.1.3 5.16 7 Apr 1994 V3.4 BIOS; 18C30 chip + 1.1.38 5.18 30 Jul 1994 36C70 chip (PCI version of 18C30) + 1.1.62 5.20 2 Nov 1994 V3.5 BIOS + 1.1.73 5.22 7 Dec 1994 Quantum ISA-200S board; V2.0 BIOS + + 1.1.82 5.26 14 Jan 1995 V3.5 BIOS; TMC-1610M/MER/MEX board + 1.2.10 5.28 5 Jun 1995 Quantum ISA-250MG board; V2.0, V2.01 BIOS + 1.3.4 5.31 23 Jun 1995 PCI BIOS-32 detection (preliminary) + 1.3.7 5.33 4 Jul 1995 PCI BIOS-32 detection + 1.3.28 5.36 17 Sep 1995 V3.61 BIOS; LILO command-line support + 1.3.34 5.39 12 Oct 1995 V3.60 BIOS; /proc + 1.3.72 5.39 8 Feb 1996 Adaptec AHA-2920 board + 1.3.85 5.41 4 Apr 1996 + 2.0.12 5.44 8 Aug 1996 Use ID 7 for all PCI cards + + + + REFERENCES USED: + + "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation, + 1990. + + "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain + Corporation, January 1992. + + "LXT SCSI Products: Specifications and OEM Technical Manual (Revision + B/September 1991)", Maxtor Corporation, 1991. + + "7213S product Manual (Revision P3)", Maxtor Corporation, 1992. + + "Draft Proposed American National Standard: Small Computer System + Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109, + revision 10h, October 17, 1991) + + Private communications, Drew Eckhardt (drew@cs.colorado.edu) and Eric + Youngdale (ericy@cais.com), 1992. + + Private communication, Tuong Le (Future Domain Engineering department), + 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and + TMC-18C30 detection.) + + Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page + 60 (2.39: Disk Partition Table Layout). + + "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page + 6-1. + + + + NOTES ON REFERENCES: + + The Maxtor manuals were free. Maxtor telephone technical support is + great! + + The Future Domain manuals were $25 and $35. They document the chip, not + the TMC-16x0 boards, so some information I had to guess at. In 1992, + Future Domain sold DOS BIOS source for $250 and the UN*X driver source was + $750, but these required a non-disclosure agreement, so even if I could + have afforded them, they would *not* have been useful for writing this + publically distributable driver. Future Domain technical support has + provided some information on the phone and have sent a few useful FAXs. + They have been much more helpful since they started to recognize that the + word "Linux" refers to an operating system :-). + + + + ALPHA TESTERS: + + There are many other alpha testers that come and go as the driver + develops. The people listed here were most helpful in times of greatest + need (mostly early on -- I've probably left out a few worthy people in + more recent times): + + Todd Carrico (todd@wutc.wustl.edu), Dan Poirier (poirier@cs.unc.edu ), Ken + Corey (kenc@sol.acs.unt.edu), C. de Bruin (bruin@bruin@sterbbs.nl), Sakari + Aaltonen (sakaria@vipunen.hit.fi), John Rice (rice@xanth.cs.odu.edu), Brad + Yearwood (brad@optilink.com), and Ray Toy (toy@soho.crd.ge.com). + + Special thanks to Tien-Wan Yang (twyang@cs.uh.edu), who graciously lent me + his 18C50-based card for debugging. He is the sole reason that this + driver works with the 18C50 chip. + + Thanks to Dave Newman (dnewman@crl.com) for providing initial patches for + the version 3.4 BIOS. + + Thanks to James T. McKinley (mckinley@msupa.pa.msu.edu) for providing + patches that support the TMC-3260, a PCI bus card with the 36C70 chip. + The 36C70 chip appears to be "completely compatible" with the 18C30 chip. + + Thanks to Eric Kasten (tigger@petroglyph.cl.msu.edu) for providing the + patch for the version 3.5 BIOS. + + Thanks for Stephen Henson (shenson@nyx10.cs.du.edu) for providing the + patch for the Quantum ISA-200S SCSI adapter. + + Thanks to Adam Bowen for the signature to the 1610M/MER/MEX scsi cards, to + Martin Andrews (andrewm@ccfadm.eeg.ccf.org) for the signature to some + random TMC-1680 repackaged by IBM; and to Mintak Ng (mintak@panix.com) for + the version 3.61 BIOS signature. + + Thanks for Mark Singer (elf@netcom.com) and Richard Simpson + (rsimpson@ewrcsdra.demon.co.uk) for more Quantum signatures and detective + work on the Quantum RAM layout. + + Special thanks to James T. McKinley (mckinley@msupa.pa.msu.edu) for + providing patches for proper PCI BIOS32-mediated detection of the TMC-3260 + card (a PCI bus card with the 36C70 chip). Please send James PCI-related + bug reports. + + Thanks to Tom Cavin (tec@usa1.com) for preliminary command-line option + patches. + + All of the alpha testers deserve much thanks. + + + + NOTES ON USER DEFINABLE OPTIONS: + + DEBUG: This turns on the printing of various debug information. + + ENABLE_PARITY: This turns on SCSI parity checking. With the current + driver, all attached devices must support SCSI parity. If none of your + devices support parity, then you can probably get the driver to work by + turning this option off. I have no way of testing this, however, and it + would appear that no one ever uses this option. + + FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the + 18C30 chip have a 2k cache). When this many 512 byte blocks are filled by + the SCSI device, an interrupt will be raised. Therefore, this could be as + low as 0, or as high as 16. Note, however, that values which are too high + or too low seem to prevent any interrupts from occurring, and thereby lock + up the machine. I have found that 2 is a good number, but throughput may + be increased by changing this value to values which are close to 2. + Please let me know if you try any different values. + + DO_DETECT: This activates some old scan code which was needed before the + high level drivers got fixed. If you are having trouble with the driver, + turning this on should not hurt, and might help. Please let me know if + this is the case, since this code will be removed from future drivers. + + RESELECTION: This is no longer an option, since I gave up trying to + implement it in version 4.x of this driver. It did not improve + performance at all and made the driver unstable (because I never found one + of the two race conditions which were introduced by the multiple + outstanding command code). The instability seems a very high price to pay + just so that you don't have to wait for the tape to rewind. If you want + this feature implemented, send me patches. I'll be happy to send a copy + of my (broken) driver to anyone who would like to see a copy. + + **************************************************************************/ + +#ifdef PCMCIA +#define MODULE +#endif + +#ifdef MODULE +#include <linux/module.h> +#endif + +#ifdef PCMCIA +#undef MODULE +#endif + +#include <linux/sched.h> +#include <asm/io.h> +#include <linux/blk.h> +#include "scsi.h" +#include "hosts.h" +#include "fdomain.h" +#include <asm/system.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/ioport.h> +#include <linux/proc_fs.h> +#include <linux/bios32.h> +#include <linux/pci.h> +#include <linux/stat.h> + +#include <linux/config.h> /* for CONFIG_PCI */ + +struct proc_dir_entry proc_scsi_fdomain = { + PROC_SCSI_FDOMAIN, 7, "fdomain", + S_IFDIR | S_IRUGO | S_IXUGO, 2 +}; + +#define VERSION "$Revision: 1.1 $" + +/* START OF USER DEFINABLE OPTIONS */ + +#define DEBUG 1 /* Enable debugging output */ +#define ENABLE_PARITY 1 /* Enable SCSI Parity */ +#define FIFO_COUNT 2 /* Number of 512 byte blocks before INTR */ +#define DO_DETECT 0 /* Do device detection here (see scsi.c) */ + +/* END OF USER DEFINABLE OPTIONS */ + +#if DEBUG +#define EVERY_ACCESS 0 /* Write a line on every scsi access */ +#define ERRORS_ONLY 1 /* Only write a line if there is an error */ +#define DEBUG_DETECT 0 /* Debug fdomain_16x0_detect() */ +#define DEBUG_MESSAGES 1 /* Debug MESSAGE IN phase */ +#define DEBUG_ABORT 1 /* Debug abort() routine */ +#define DEBUG_RESET 1 /* Debug reset() routine */ +#define DEBUG_RACE 1 /* Debug interrupt-driven race condition */ +#else +#define EVERY_ACCESS 0 /* LEAVE THESE ALONE--CHANGE THE ONES ABOVE */ +#define ERRORS_ONLY 0 +#define DEBUG_DETECT 0 +#define DEBUG_MESSAGES 0 +#define DEBUG_ABORT 0 +#define DEBUG_RESET 0 +#define DEBUG_RACE 0 +#endif + +/* Errors are reported on the line, so we don't need to report them again */ +#if EVERY_ACCESS +#undef ERRORS_ONLY +#define ERRORS_ONLY 0 +#endif + +#if ENABLE_PARITY +#define PARITY_MASK 0x08 +#else +#define PARITY_MASK 0x00 +#endif + +enum chip_type { + unknown = 0x00, + tmc1800 = 0x01, + tmc18c50 = 0x02, + tmc18c30 = 0x03, +}; + +enum { + in_arbitration = 0x02, + in_selection = 0x04, + in_other = 0x08, + disconnect = 0x10, + aborted = 0x20, + sent_ident = 0x40, +}; + +enum in_port_type { + Read_SCSI_Data = 0, + SCSI_Status = 1, + TMC_Status = 2, + FIFO_Status = 3, /* tmc18c50/tmc18c30 only */ + Interrupt_Cond = 4, /* tmc18c50/tmc18c30 only */ + LSB_ID_Code = 5, + MSB_ID_Code = 6, + Read_Loopback = 7, + SCSI_Data_NoACK = 8, + Interrupt_Status = 9, + Configuration1 = 10, + Configuration2 = 11, /* tmc18c50/tmc18c30 only */ + Read_FIFO = 12, + FIFO_Data_Count = 14 +}; + +enum out_port_type { + Write_SCSI_Data = 0, + SCSI_Cntl = 1, + Interrupt_Cntl = 2, + SCSI_Mode_Cntl = 3, + TMC_Cntl = 4, + Memory_Cntl = 5, /* tmc18c50/tmc18c30 only */ + Write_Loopback = 7, + IO_Control = 11, /* tmc18c30 only */ + Write_FIFO = 12 +}; + +static int port_base = 0; +static void *bios_base = NULL; +static int bios_major = 0; +static int bios_minor = 0; +static int PCI_bus = 0; +static int Quantum = 0; /* Quantum board variant */ +static int interrupt_level = 0; +static volatile int in_command = 0; +static Scsi_Cmnd *current_SC = NULL; +static enum chip_type chip = unknown; +static int adapter_mask = 0; +static int this_id = 0; +static int setup_called = 0; + +#if DEBUG_RACE +static volatile int in_interrupt_flag = 0; +#endif + +static int SCSI_Mode_Cntl_port; +static int FIFO_Data_Count_port; +static int Interrupt_Cntl_port; +static int Interrupt_Status_port; +static int Read_FIFO_port; +static int Read_SCSI_Data_port; +static int SCSI_Cntl_port; +static int SCSI_Data_NoACK_port; +static int SCSI_Status_port; +static int TMC_Cntl_port; +static int TMC_Status_port; +static int Write_FIFO_port; +static int Write_SCSI_Data_port; + +static int FIFO_Size = 0x2000; /* 8k FIFO for + pre-tmc18c30 chips */ + +extern void fdomain_16x0_intr( int irq, void *dev_id, struct pt_regs * regs ); + +static void *addresses[] = { + (void *)0xc8000, + (void *)0xca000, + (void *)0xce000, + (void *)0xde000, + (void *)0xcc000, /* Extra addresses for PCI boards */ + (void *)0xd0000, + (void *)0xe0000, +}; +#define ADDRESS_COUNT (sizeof( addresses ) / sizeof( unsigned )) + +static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 }; +#define PORT_COUNT (sizeof( ports ) / sizeof( unsigned short )) + +static unsigned short ints[] = { 3, 5, 10, 11, 12, 14, 15, 0 }; + +/* + + READ THIS BEFORE YOU ADD A SIGNATURE! + + READING THIS SHORT NOTE CAN SAVE YOU LOTS OF TIME! + + READ EVERY WORD, ESPECIALLY THE WORD *NOT* + + This driver works *ONLY* for Future Domain cards using the TMC-1800, + TMC-18C50, or TMC-18C30 chip. This includes models TMC-1650, 1660, 1670, + and 1680. + + The following BIOS signature signatures are for boards which do *NOT* + work with this driver (these TMC-8xx and TMC-9xx boards may work with the + Seagate driver): + + FUTURE DOMAIN CORP. (C) 1986-1988 V4.0I 03/16/88 + FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89 + FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89 + FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90 + FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90 + FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90 + FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92 + +*/ + +struct signature { + const char *signature; + int sig_offset; + int sig_length; + int major_bios_version; + int minor_bios_version; + int flag; /* 1 == PCI_bus, 2 == ISA_200S, 3 == ISA_250MG, 4 == ISA_200S */ +} signatures[] = { + /* 1 2 3 4 5 6 */ + /* 123456789012345678901234567890123456789012345678901234567890 */ + { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 5, 50, 2, 0, 0 }, + { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V1.07/28/89", 5, 50, 2, 0, 0 }, + { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 72, 50, 2, 0, 2 }, + { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.0", 73, 43, 2, 0, 3 }, + { "FUTURE DOMAIN CORP. (C) 1991 1800-V2.0.", 72, 39, 2, 0, 4 }, + { "FUTURE DOMAIN CORP. (C) 1992 V3.00.004/02/92", 5, 44, 3, 0, 0 }, + { "FUTURE DOMAIN TMC-18XX (C) 1993 V3.203/12/93", 5, 44, 3, 2, 0 }, + { "IBM F1 P2 BIOS v1.0104/29/93", 5, 28, 3, -1, 0 }, + { "Future Domain Corp. V1.0008/18/93", 5, 33, 3, 4, 0 }, + { "Future Domain Corp. V1.0008/18/93", 26, 33, 3, 4, 1 }, + { "Adaptec AHA-2920 PCI-SCSI Card", 42, 31, 3, -1, 1 }, + { "IBM F1 P264/32", 5, 14, 3, -1, 1 }, + /* This next signature may not be a 3.5 bios */ + { "Future Domain Corp. V2.0108/18/93", 5, 33, 3, 5, 0 }, + { "FUTURE DOMAIN CORP. V3.5008/18/93", 5, 34, 3, 5, 0 }, + { "FUTURE DOMAIN 18c30/18c50/1800 (C) 1994 V3.5", 5, 44, 3, 5, 0 }, + { "FUTURE DOMAIN CORP. V3.6008/18/93", 5, 34, 3, 6, 0 }, + { "FUTURE DOMAIN CORP. V3.6108/18/93", 5, 34, 3, 6, 0 }, + { "FUTURE DOMAIN TMC-18XX", 5, 22, -1, -1, 0 }, + + /* READ NOTICE ABOVE *BEFORE* YOU WASTE YOUR TIME ADDING A SIGNATURE + Also, fix the disk geometry code for your signature and send your + changes for faith@cs.unc.edu. Above all, do *NOT* change any old + signatures! + + Note that the last line will match a "generic" 18XX bios. Because + Future Domain has changed the host SCSI ID and/or the location of the + geometry information in the on-board RAM area for each of the first + three BIOS's, it is still important to enter a fully qualified + signature in the table for any new BIOS's (after the host SCSI ID and + geometry location are verified). */ +}; + +#define SIGNATURE_COUNT (sizeof( signatures ) / sizeof( struct signature )) + +static void print_banner( struct Scsi_Host *shpnt ) +{ + if (!shpnt) return; /* This won't ever happen */ + + if (bios_major < 0 && bios_minor < 0) { + printk( "scsi%d <fdomain>: No BIOS; using scsi id %d\n", + shpnt->host_no, shpnt->this_id ); + } else { + printk( "scsi%d <fdomain>: BIOS version ", shpnt->host_no ); + + if (bios_major >= 0) printk( "%d.", bios_major ); + else printk( "?." ); + + if (bios_minor >= 0) printk( "%d", bios_minor ); + else printk( "?." ); + + printk( " at 0x%x using scsi id %d\n", + (unsigned)bios_base, shpnt->this_id ); + } + + /* If this driver works for later FD PCI + boards, we will have to modify banner + for additional PCI cards, but for now if + it's PCI it's a TMC-3260 - JTM */ + printk( "scsi%d <fdomain>: %s chip at 0x%x irq ", + shpnt->host_no, + chip == tmc1800 ? "TMC-1800" + : (chip == tmc18c50 ? "TMC-18C50" + : (chip == tmc18c30 ? + (PCI_bus ? "TMC-36C70 (PCI bus)" : "TMC-18C30") + : "Unknown")), + port_base ); + + if (interrupt_level) printk( "%d", interrupt_level ); + else printk( "<none>" ); + + printk( "\n" ); +} + +void fdomain_setup( char *str, int *ints ) +{ + if (setup_called++ || ints[0] < 2 || ints[0] > 3) { + printk( "fdomain: usage: fdomain=<PORT_BASE>,<IRQ>[,<ADAPTER_ID>]\n" ); + printk( "fdomain: bad LILO parameters?\n" ); + } + + port_base = ints[0] >= 1 ? ints[1] : 0; + interrupt_level = ints[0] >= 2 ? ints[2] : 0; + this_id = ints[0] >= 3 ? ints[3] : 0; + + bios_major = bios_minor = -1; /* Use geometry for BIOS version >= 3.4 */ +} + + +static void do_pause( unsigned amount ) /* Pause for amount*10 milliseconds */ +{ + unsigned long the_time = jiffies + amount; /* 0.01 seconds per jiffy */ + + while (jiffies < the_time); +} + +inline static void fdomain_make_bus_idle( void ) +{ + outb( 0, SCSI_Cntl_port ); + outb( 0, SCSI_Mode_Cntl_port ); + if (chip == tmc18c50 || chip == tmc18c30) + outb( 0x21 | PARITY_MASK, TMC_Cntl_port ); /* Clear forced intr. */ + else + outb( 0x01 | PARITY_MASK, TMC_Cntl_port ); +} + +static int fdomain_is_valid_port( int port ) +{ +#if DEBUG_DETECT + printk( " (%x%x),", + inb( port + MSB_ID_Code ), inb( port + LSB_ID_Code ) ); +#endif + + /* The MCA ID is a unique id for each MCA compatible board. We + are using ISA boards, but Future Domain provides the MCA ID + anyway. We can use this ID to ensure that this is a Future + Domain TMC-1660/TMC-1680. + */ + + if (inb( port + LSB_ID_Code ) != 0xe9) { /* test for 0x6127 id */ + if (inb( port + LSB_ID_Code ) != 0x27) return 0; + if (inb( port + MSB_ID_Code ) != 0x61) return 0; + chip = tmc1800; + } else { /* test for 0xe960 id */ + if (inb( port + MSB_ID_Code ) != 0x60) return 0; + chip = tmc18c50; + +#if 0 + + /* Try to toggle 32-bit mode. This only + works on an 18c30 chip. (User reports + say this works, so we should switch to + it in the near future.) */ + + outb( 0x80, port + IO_Control ); + if ((inb( port + Configuration2 ) & 0x80) == 0x80) { + outb( 0x00, port + IO_Control ); + if ((inb( port + Configuration2 ) & 0x80) == 0x00) { + chip = tmc18c30; + FIFO_Size = 0x800; /* 2k FIFO */ + } + } +#else + + /* That should have worked, but appears to + have problems. Let's assume it is an + 18c30 if the RAM is disabled. */ + + if (inb( port + Configuration2 ) & 0x02) { + chip = tmc18c30; + FIFO_Size = 0x800; /* 2k FIFO */ + } +#endif + /* If that failed, we are an 18c50. */ + } + + return 1; +} + +static int fdomain_test_loopback( void ) +{ + int i; + int result; + + for (i = 0; i < 255; i++) { + outb( i, port_base + Write_Loopback ); + result = inb( port_base + Read_Loopback ); + if (i != result) + return 1; + } + return 0; +} + +/* fdomain_get_irq assumes that we have a valid MCA ID for a + TMC-1660/TMC-1680 Future Domain board. Now, check to be sure the + bios_base matches these ports. If someone was unlucky enough to have + purchased more than one Future Domain board, then they will have to + modify this code, as we only detect one board here. [The one with the + lowest bios_base.] + + Note that this routine is only used for systems without a PCI BIOS32 + (e.g., ISA bus). For PCI bus systems, this routine will likely fail + unless one of the IRQs listed in the ints array is used by the board. + Sometimes it is possible to use the computer's BIOS setup screen to + configure a PCI system so that one of these IRQs will be used by the + Future Domain card. */ + +static int fdomain_get_irq( int base ) +{ + int options = inb( base + Configuration1 ); + +#if DEBUG_DETECT + printk( " Options = %x\n", options ); +#endif + + /* Check for board with lowest bios_base -- + this isn't valid for the 18c30 or for + boards on the PCI bus, so just assume we + have the right board. */ + + if (chip != tmc18c30 + && !PCI_bus + && addresses[ (options & 0xc0) >> 6 ] != bios_base) return 0; + + return ints[ (options & 0x0e) >> 1 ]; +} + +static int fdomain_isa_detect( int *irq, int *iobase ) +{ + int i; + int base; + int flag = 0; + + if (bios_major == 2) { + /* The TMC-1660/TMC-1680 has a RAM area just after the BIOS ROM. + Assuming the ROM is enabled (otherwise we wouldn't have been + able to read the ROM signature :-), then the ROM sets up the + RAM area with some magic numbers, such as a list of port + base addresses and a list of the disk "geometry" reported to + DOS (this geometry has nothing to do with physical geometry). + */ + + switch (Quantum) { + case 2: /* ISA_200S */ + case 3: /* ISA_250MG */ + base = *((char *)bios_base + 0x1fa2) + + (*((char *)bios_base + 0x1fa3) << 8); + break; + case 4: /* ISA_200S (another one) */ + base = *((char *)bios_base + 0x1fa3) + + (*((char *)bios_base + 0x1fa4) << 8); + break; + default: + base = *((char *)bios_base + 0x1fcc) + + (*((char *)bios_base + 0x1fcd) << 8); + break; + } + +#if DEBUG_DETECT + printk( " %x,", base ); +#endif + + for (flag = 0, i = 0; !flag && i < PORT_COUNT; i++) { + if (base == ports[i]) + ++flag; + } + + if (flag && fdomain_is_valid_port( base )) { + *irq = fdomain_get_irq( base ); + *iobase = base; + return 1; + } + + /* This is a bad sign. It usually means that someone patched the + BIOS signature list (the signatures variable) to contain a BIOS + signature for a board *OTHER THAN* the TMC-1660/TMC-1680. */ + +#if DEBUG_DETECT + printk( " RAM FAILED, " ); +#endif + } + + /* Anyway, the alternative to finding the address in the RAM is to just + search through every possible port address for one that is attached + to the Future Domain card. Don't panic, though, about reading all + these random port addresses -- there are rumors that the Future + Domain BIOS does something very similar. + + Do not, however, check ports which the kernel knows are being used by + another driver. */ + + for (i = 0; i < PORT_COUNT; i++) { + base = ports[i]; + if (check_region( base, 0x10 )) { +#if DEBUG_DETECT + printk( " (%x inuse),", base ); +#endif + continue; + } +#if DEBUG_DETECT + printk( " %x,", base ); +#endif + if ((flag = fdomain_is_valid_port( base ))) break; + } + + if (!flag) return 0; /* iobase not found */ + + *irq = fdomain_get_irq( base ); + *iobase = base; + + return 1; /* success */ +} + +static int fdomain_pci_nobios_detect( int *irq, int *iobase ) +{ + int i; + int flag = 0; + + /* The proper way of doing this is to use ask the PCI bus for the device + IRQ and interrupt level. But we can't do that if PCI BIOS32 support + isn't compiled into the kernel, or if a PCI BIOS32 isn't present. + + Instead, we scan down a bunch of addresses (Future Domain tech + support says we will probably find the address before we get to + 0xf800). This works fine on some systems -- other systems may have + to scan more addresses. If you have to modify this section for your + installation, please send mail to faith@cs.unc.edu. */ + + for (i = 0xfff8; i > 0xe000; i -= 8) { + if (check_region( i, 0x10 )) { +#if DEBUG_DETECT + printk( " (%x inuse)," , i ); +#endif + continue; + } + if ((flag = fdomain_is_valid_port( i ))) break; + } + + if (!flag) return 0; /* iobase not found */ + + *irq = fdomain_get_irq( i ); + *iobase = i; + + return 1; /* success */ +} + +/* PCI detection function: int fdomain_pci_bios_detect(int* irq, int* + iobase) This function gets the Interrupt Level and I/O base address from + the PCI configuration registers. The I/O base address is masked with + 0xfff8 since on my card the address read from the PCI config registers + is off by one from the actual I/O base address necessary for accessing + the status and control registers on the card (PCI config register gives + 0xf801, actual address is 0xf800). This is likely a bug in the FD + config code that writes to the PCI registers, however using a mask + should be safe since I think the scan done by the card to determine the + I/O base is done in increments of 8 (i.e., 0xf800, 0xf808, ...), at + least the old scan code we used to use to get the I/O base did... Also, + the device ID from the PCI config registers is 0x0 and should be 0x60e9 + as it is in the status registers (offset 5 from I/O base). If this is + changed in future hardware/BIOS changes it will need to be fixed in this + detection function. Comments, bug reports, etc... on this function + should be sent to mckinley@msupa.pa.msu.edu - James T. McKinley. */ + +#ifdef CONFIG_PCI +static int fdomain_pci_bios_detect( int *irq, int *iobase ) +{ + int error; + unsigned char pci_bus, pci_dev_fn; /* PCI bus & device function */ + unsigned char pci_irq; /* PCI interrupt line */ + unsigned int pci_base; /* PCI I/O base address */ + unsigned short pci_vendor, pci_device; /* PCI vendor & device IDs */ + + /* If the PCI BIOS doesn't exist, use the old-style detection routines. + Otherwise, get the I/O base address and interrupt from the PCI config + registers. */ + + if (!pcibios_present()) return fdomain_pci_nobios_detect( irq, iobase ); + +#if DEBUG_DETECT + /* Tell how to print a list of the known PCI devices from bios32 and + list vendor and device IDs being used if in debug mode. */ + + printk( "\nINFO: cat /proc/pci to see list of PCI devices from bios32\n" ); + printk( "\nTMC-3260 detect:" + " Using PCI Vendor ID: 0x%x, PCI Device ID: 0x%x\n", + PCI_VENDOR_ID_FD, + PCI_DEVICE_ID_FD_36C70 ); +#endif + + /* We will have to change this if more than 1 PCI bus is present and the + FD scsi host is not on the first bus (i.e., a PCI to PCI bridge, + which is not supported by bios32 right now anyway). This should + probably be done by a call to pcibios_find_device but I can't get it + to work... Also the device ID reported from the PCI config registers + does not match the device ID quoted in the tech manual or available + from offset 5 from the I/O base address. It should be 0x60E9, but it + is 0x0 if read from the PCI config registers. I guess the FD folks + neglected to write it to the PCI registers... This loop is necessary + to get the device function (at least until someone can get + pcibios_find_device to work, I cannot but 53c7,8xx.c uses it...). */ + + pci_bus = 0; + + for (pci_dev_fn = 0x0; pci_dev_fn < 0xff; pci_dev_fn++) { + pcibios_read_config_word( pci_bus, + pci_dev_fn, + PCI_VENDOR_ID, + &pci_vendor ); + + if (pci_vendor == PCI_VENDOR_ID_FD) { + pcibios_read_config_word( pci_bus, + pci_dev_fn, + PCI_DEVICE_ID, + &pci_device ); + + if (pci_device == PCI_DEVICE_ID_FD_36C70) { + /* Break out once we have the correct device. If other FD + PCI devices are added to this driver we will need to add + an or of the other PCI_DEVICE_ID_FD_XXXXX's here. */ + break; + } else { + /* If we can't find an FD scsi card we give up. */ + return 0; + } + } + } + +#if DEBUG_DETECT + printk( "Future Domain 36C70 : at PCI bus %u, device %u, function %u\n", + pci_bus, + (pci_dev_fn & 0xf8) >> 3, + pci_dev_fn & 7 ); +#endif + + /* We now have the appropriate device function for the FD board so we + just read the PCI config info from the registers. */ + + if ((error = pcibios_read_config_dword( pci_bus, + pci_dev_fn, + PCI_BASE_ADDRESS_0, + &pci_base )) + || (error = pcibios_read_config_byte( pci_bus, + pci_dev_fn, + PCI_INTERRUPT_LINE, + &pci_irq ))) { + printk ( "PCI ERROR: Future Domain 36C70 not initializing" + " due to error reading configuration space\n" ); + return 0; + } else { +#if DEBUG_DETECT + printk( "TMC-3260 PCI: IRQ = %u, I/O base = 0x%lx\n", + pci_irq, pci_base ); +#endif + + /* Now we have the I/O base address and interrupt from the PCI + configuration registers. Unfortunately it seems that the I/O base + address is off by one on my card so I mask it with 0xfff8. This + must be some kind of goof in the FD code that does the autoconfig + and writes to the PCI registers (or maybe I just don't understand + something). If they fix it in later versions of the card or BIOS + we may have to adjust the address based on the signature or + something... */ + + *irq = pci_irq; + *iobase = (pci_base & 0xfff8); + +#if DEBUG_DETECT + printk( "TMC-3260 fix: Masking I/O base address with 0xff00.\n" ); + printk( "TMC-3260: IRQ = %d, I/O base = 0x%x\n", *irq, *iobase ); +#endif + + if (!fdomain_is_valid_port( *iobase )) return 0; + return 1; + } + return 0; +} +#endif + +int fdomain_16x0_detect( Scsi_Host_Template *tpnt ) +{ + int i, j; + int retcode; + struct Scsi_Host *shpnt; +#if DO_DETECT + const int buflen = 255; + Scsi_Cmnd SCinit; + unsigned char do_inquiry[] = { INQUIRY, 0, 0, 0, buflen, 0 }; + unsigned char do_request_sense[] = { REQUEST_SENSE, 0, 0, 0, buflen, 0 }; + unsigned char do_read_capacity[] = { READ_CAPACITY, + 0, 0, 0, 0, 0, 0, 0, 0, 0 }; + unsigned char buf[buflen]; +#endif + +#if DEBUG_DETECT + printk( "fdomain_16x0_detect()," ); +#endif + tpnt->proc_dir = &proc_scsi_fdomain; + + if (setup_called) { +#if DEBUG_DETECT + printk( "no BIOS, using port_base = 0x%x, irq = %d\n", + port_base, interrupt_level ); +#endif + if (!fdomain_is_valid_port( port_base )) { + printk( "fdomain: cannot locate chip at port base 0x%x\n", + port_base ); + printk( "fdomain: bad LILO parameters?\n" ); + return 0; + } + } else { + int flag = 0; + + for (i = 0; !bios_base && i < ADDRESS_COUNT; i++) { +#if DEBUG_DETECT + printk( " %x(%x),", (unsigned)addresses[i], (unsigned)bios_base ); +#endif + for (j = 0; !bios_base && j < SIGNATURE_COUNT; j++) { + if (!memcmp( ((char *)addresses[i] + signatures[j].sig_offset), + signatures[j].signature, signatures[j].sig_length )) { + bios_major = signatures[j].major_bios_version; + bios_minor = signatures[j].minor_bios_version; + PCI_bus = (signatures[j].flag == 1); + Quantum = (signatures[j].flag > 1) ? signatures[j].flag : 0; + bios_base = addresses[i]; + } + } + } + + if (!bios_base) { +#if DEBUG_DETECT + printk( " FAILED: NO BIOS\n" ); +#endif + return 0; + } + + if (!PCI_bus) { + flag = fdomain_isa_detect( &interrupt_level, &port_base ); + } else { +#ifdef CONFIG_PCI + flag = fdomain_pci_bios_detect( &interrupt_level, &port_base ); +#else + flag = fdomain_pci_nobios_detect( &interrupt_level, &port_base ); +#endif + } + + if (!flag) { +#if DEBUG_DETECT + printk( " FAILED: NO PORT\n" ); +#endif +#ifdef CONFIG_PCI + printk( "\nTMC-3260 36C70 PCI scsi chip detection failed.\n" ); + printk( "Send mail to mckinley@msupa.pa.msu.edu.\n" ); +#endif + return 0; /* Cannot find valid set of ports */ + } + } + + SCSI_Mode_Cntl_port = port_base + SCSI_Mode_Cntl; + FIFO_Data_Count_port = port_base + FIFO_Data_Count; + Interrupt_Cntl_port = port_base + Interrupt_Cntl; + Interrupt_Status_port = port_base + Interrupt_Status; + Read_FIFO_port = port_base + Read_FIFO; + Read_SCSI_Data_port = port_base + Read_SCSI_Data; + SCSI_Cntl_port = port_base + SCSI_Cntl; + SCSI_Data_NoACK_port = port_base + SCSI_Data_NoACK; + SCSI_Status_port = port_base + SCSI_Status; + TMC_Cntl_port = port_base + TMC_Cntl; + TMC_Status_port = port_base + TMC_Status; + Write_FIFO_port = port_base + Write_FIFO; + Write_SCSI_Data_port = port_base + Write_SCSI_Data; + + fdomain_16x0_reset( NULL, 0 ); + + if (fdomain_test_loopback()) { +#if DEBUG_DETECT + printk( "fdomain: LOOPBACK TEST FAILED, FAILING DETECT!\n" ); +#endif + if (setup_called) { + printk( "fdomain: loopback test failed at port base 0x%x\n", + port_base ); + printk( "fdomain: bad LILO parameters?\n" ); + } + return 0; + } + + if (this_id) { + tpnt->this_id = (this_id & 0x07); + adapter_mask = (1 << tpnt->this_id); + } else { + if (PCI_bus || (bios_major == 3 && bios_minor >= 2) || bios_major < 0) { + tpnt->this_id = 7; + adapter_mask = 0x80; + } else { + tpnt->this_id = 6; + adapter_mask = 0x40; + } + } + + /* Print out a banner here in case we can't + get resources. */ + + shpnt = scsi_register( tpnt, 0 ); + shpnt->irq = interrupt_level; + shpnt->io_port = port_base; + shpnt->n_io_port = 0x10; + print_banner( shpnt ); + + /* Log IRQ with kernel */ + if (!interrupt_level) { + panic( "fdomain: *NO* interrupt level selected!\n" ); + } else { + /* Register the IRQ with the kernel */ + + retcode = request_irq( interrupt_level, + fdomain_16x0_intr, SA_INTERRUPT, "fdomain", NULL); + + if (retcode < 0) { + if (retcode == -EINVAL) { + printk( "fdomain: IRQ %d is bad!\n", interrupt_level ); + printk( " This shouldn't happen!\n" ); + printk( " Send mail to faith@cs.unc.edu\n" ); + } else if (retcode == -EBUSY) { + printk( "fdomain: IRQ %d is already in use!\n", interrupt_level ); + printk( " Please use another IRQ!\n" ); + } else { + printk( "fdomain: Error getting IRQ %d\n", interrupt_level ); + printk( " This shouldn't happen!\n" ); + printk( " Send mail to faith@cs.unc.edu\n" ); + } + panic( "fdomain: Driver requires interruptions\n" ); + } + } + + /* Log I/O ports with kernel */ + request_region( port_base, 0x10, "fdomain" ); + +#if DO_DETECT + + /* These routines are here because of the way the SCSI bus behaves after + a reset. This appropriate behavior was not handled correctly by the + higher level SCSI routines when I first wrote this driver. Now, + however, correct scan routines are part of scsi.c and these routines + are no longer needed. However, this code is still good for + debugging. */ + + SCinit.request_buffer = SCinit.buffer = buf; + SCinit.request_bufflen = SCinit.bufflen = sizeof(buf)-1; + SCinit.use_sg = 0; + SCinit.lun = 0; + + printk( "fdomain: detection routine scanning for devices:\n" ); + for (i = 0; i < 8; i++) { + SCinit.target = i; + if (i == tpnt->this_id) /* Skip host adapter */ + continue; + memcpy(SCinit.cmnd, do_request_sense, sizeof(do_request_sense)); + retcode = fdomain_16x0_command(&SCinit); + if (!retcode) { + memcpy(SCinit.cmnd, do_inquiry, sizeof(do_inquiry)); + retcode = fdomain_16x0_command(&SCinit); + if (!retcode) { + printk( " SCSI ID %d: ", i ); + for (j = 8; j < (buf[4] < 32 ? buf[4] : 32); j++) + printk( "%c", buf[j] >= 20 ? buf[j] : ' ' ); + memcpy(SCinit.cmnd, do_read_capacity, sizeof(do_read_capacity)); + retcode = fdomain_16x0_command(&SCinit); + if (!retcode) { + unsigned long blocks, size, capacity; + + blocks = (buf[0] << 24) | (buf[1] << 16) + | (buf[2] << 8) | buf[3]; + size = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; + capacity = +( +(blocks / 1024L) * +(size * 10L)) / 1024L; + + printk( "%lu MB (%lu byte blocks)", + ((capacity + 5L) / 10L), size ); + } else { + memcpy(SCinit.cmnd, do_request_sense, sizeof(do_request_sense)); + retcode = fdomain_16x0_command(&SCinit); + } + printk ("\n" ); + } else { + memcpy(SCinit.cmnd, do_request_sense, sizeof(do_request_sense)); + retcode = fdomain_16x0_command(&SCinit); + } + } + } +#endif + + return 1; /* Maximum of one adapter will be detected. */ +} + +const char *fdomain_16x0_info( struct Scsi_Host *ignore ) +{ + static char buffer[80]; + char *pt; + + strcpy( buffer, "Future Domain TMC-16x0 SCSI driver, version" ); + if (strchr( VERSION, ':')) { /* Assume VERSION is an RCS Revision string */ + strcat( buffer, strchr( VERSION, ':' ) + 1 ); + pt = strrchr( buffer, '$') - 1; + if (!pt) /* Stripped RCS Revision string? */ + pt = buffer + strlen( buffer ) - 1; + if (*pt != ' ') + ++pt; + *pt = '\0'; + } else { /* Assume VERSION is a number */ + strcat( buffer, " " VERSION ); + } + + return buffer; +} + + /* First pass at /proc information routine. */ +/* + * inout : decides on the direction of the dataflow and the meaning of the + * variables + * buffer: If inout==FALSE data is being written to it else read from it + * *start: If inout==FALSE start of the valid data in the buffer + * offset: If inout==FALSE offset from the beginning of the imaginary file + * from which we start writing into the buffer + * length: If inout==FALSE max number of bytes to be written into the buffer + * else number of bytes in the buffer + */ +int fdomain_16x0_proc_info( char *buffer, char **start, off_t offset, + int length, int hostno, int inout ) +{ + const char *info = fdomain_16x0_info( NULL ); + int len; + int pos; + int begin; + + if (inout) return(-ENOSYS); + + begin = 0; + strcpy( buffer, info ); + strcat( buffer, "\n" ); + + pos = len = strlen( buffer ); + + if(pos < offset) { + len = 0; + begin = pos; + } + + *start = buffer + (offset - begin); /* Start of wanted data */ + len -= (offset - begin); + if(len > length) len = length; + + return(len); +} + +#if 0 +static int fdomain_arbitrate( void ) +{ + int status = 0; + unsigned long timeout; + +#if EVERY_ACCESS + printk( "fdomain_arbitrate()\n" ); +#endif + + outb( 0x00, SCSI_Cntl_port ); /* Disable data drivers */ + outb( adapter_mask, port_base + SCSI_Data_NoACK ); /* Set our id bit */ + outb( 0x04 | PARITY_MASK, TMC_Cntl_port ); /* Start arbitration */ + + timeout = jiffies + 50; /* 500 mS */ + while (jiffies < timeout) { + status = inb( TMC_Status_port ); /* Read adapter status */ + if (status & 0x02) /* Arbitration complete */ + return 0; + } + + /* Make bus idle */ + fdomain_make_bus_idle(); + +#if EVERY_ACCESS + printk( "Arbitration failed, status = %x\n", status ); +#endif +#if ERRORS_ONLY + printk( "fdomain: Arbitration failed, status = %x\n", status ); +#endif + return 1; +} +#endif + +static int fdomain_select( int target ) +{ + int status; + unsigned long timeout; + static int flag = 0; + + + outb( 0x82, SCSI_Cntl_port ); /* Bus Enable + Select */ + outb( adapter_mask | (1 << target), SCSI_Data_NoACK_port ); + + /* Stop arbitration and enable parity */ + outb( PARITY_MASK, TMC_Cntl_port ); + + timeout = jiffies + 35; /* 350mS -- because of timeouts + (was 250mS) */ + + while (jiffies < timeout) { + status = inb( SCSI_Status_port ); /* Read adapter status */ + if (status & 1) { /* Busy asserted */ + /* Enable SCSI Bus (on error, should make bus idle with 0) */ + outb( 0x80, SCSI_Cntl_port ); + return 0; + } + } + /* Make bus idle */ + fdomain_make_bus_idle(); +#if EVERY_ACCESS + if (!target) printk( "Selection failed\n" ); +#endif +#if ERRORS_ONLY + if (!target) { + if (!flag) /* Skip first failure for all chips. */ + ++flag; + else + printk( "fdomain: Selection failed\n" ); + } +#endif + return 1; +} + +void my_done( int error ) +{ + if (in_command) { + in_command = 0; + outb( 0x00, Interrupt_Cntl_port ); + fdomain_make_bus_idle(); + current_SC->result = error; + if (current_SC->scsi_done) + current_SC->scsi_done( current_SC ); + else panic( "fdomain: current_SC->scsi_done() == NULL" ); + } else { + panic( "fdomain: my_done() called outside of command\n" ); + } +#if DEBUG_RACE + in_interrupt_flag = 0; +#endif +} + +void fdomain_16x0_intr( int irq, void *dev_id, struct pt_regs * regs ) +{ + int status; + int done = 0; + unsigned data_count; + + /* The fdomain_16x0_intr is only called via + the interrupt handler. The goal of the + sti() here is to allow other + interruptions while this routine is + running. */ + + sti(); /* Yes, we really want sti() here */ + + outb( 0x00, Interrupt_Cntl_port ); + + /* We usually have one spurious interrupt after each command. Ignore it. */ + if (!in_command || !current_SC) { /* Spurious interrupt */ +#if EVERY_ACCESS + printk( "Spurious interrupt, in_command = %d, current_SC = %x\n", + in_command, current_SC ); +#endif + return; + } + + /* Abort calls my_done, so we do nothing here. */ + if (current_SC->SCp.phase & aborted) { +#if DEBUG_ABORT + printk( "Interrupt after abort, ignoring\n" ); +#endif + /* + return; */ + } + +#if DEBUG_RACE + ++in_interrupt_flag; +#endif + + if (current_SC->SCp.phase & in_arbitration) { + status = inb( TMC_Status_port ); /* Read adapter status */ + if (!(status & 0x02)) { +#if EVERY_ACCESS + printk( " AFAIL " ); +#endif + my_done( DID_BUS_BUSY << 16 ); + return; + } + current_SC->SCp.phase = in_selection; + + outb( 0x40 | FIFO_COUNT, Interrupt_Cntl_port ); + + outb( 0x82, SCSI_Cntl_port ); /* Bus Enable + Select */ + outb( adapter_mask | (1 << current_SC->target), SCSI_Data_NoACK_port ); + + /* Stop arbitration and enable parity */ + outb( 0x10 | PARITY_MASK, TMC_Cntl_port ); +#if DEBUG_RACE + in_interrupt_flag = 0; +#endif + return; + } else if (current_SC->SCp.phase & in_selection) { + status = inb( SCSI_Status_port ); + if (!(status & 0x01)) { + /* Try again, for slow devices */ + if (fdomain_select( current_SC->target )) { +#if EVERY_ACCESS + printk( " SFAIL " ); +#endif + my_done( DID_NO_CONNECT << 16 ); + return; + } else { +#if EVERY_ACCESS + printk( " AltSel " ); +#endif + /* Stop arbitration and enable parity */ + outb( 0x10 | PARITY_MASK, TMC_Cntl_port ); + } + } + current_SC->SCp.phase = in_other; + outb( 0x90 | FIFO_COUNT, Interrupt_Cntl_port ); + outb( 0x80, SCSI_Cntl_port ); +#if DEBUG_RACE + in_interrupt_flag = 0; +#endif + return; + } + + /* current_SC->SCp.phase == in_other: this is the body of the routine */ + + status = inb( SCSI_Status_port ); + + if (status & 0x10) { /* REQ */ + + switch (status & 0x0e) { + + case 0x08: /* COMMAND OUT */ + outb( current_SC->cmnd[current_SC->SCp.sent_command++], + Write_SCSI_Data_port ); +#if EVERY_ACCESS + printk( "CMD = %x,", + current_SC->cmnd[ current_SC->SCp.sent_command - 1] ); +#endif + break; + case 0x00: /* DATA OUT -- tmc18c50/tmc18c30 only */ + if (chip != tmc1800 && !current_SC->SCp.have_data_in) { + current_SC->SCp.have_data_in = -1; + outb( 0xd0 | PARITY_MASK, TMC_Cntl_port ); + } + break; + case 0x04: /* DATA IN -- tmc18c50/tmc18c30 only */ + if (chip != tmc1800 && !current_SC->SCp.have_data_in) { + current_SC->SCp.have_data_in = 1; + outb( 0x90 | PARITY_MASK, TMC_Cntl_port ); + } + break; + case 0x0c: /* STATUS IN */ + current_SC->SCp.Status = inb( Read_SCSI_Data_port ); +#if EVERY_ACCESS + printk( "Status = %x, ", current_SC->SCp.Status ); +#endif +#if ERRORS_ONLY + if (current_SC->SCp.Status + && current_SC->SCp.Status != 2 + && current_SC->SCp.Status != 8) { + printk( "fdomain: target = %d, command = %x, status = %x\n", + current_SC->target, + current_SC->cmnd[0], + current_SC->SCp.Status ); + } +#endif + break; + case 0x0a: /* MESSAGE OUT */ + outb( MESSAGE_REJECT, Write_SCSI_Data_port ); /* Reject */ + break; + case 0x0e: /* MESSAGE IN */ + current_SC->SCp.Message = inb( Read_SCSI_Data_port ); +#if EVERY_ACCESS + printk( "Message = %x, ", current_SC->SCp.Message ); +#endif + if (!current_SC->SCp.Message) ++done; +#if DEBUG_MESSAGES || EVERY_ACCESS + if (current_SC->SCp.Message) { + printk( "fdomain: message = %x\n", current_SC->SCp.Message ); + } +#endif + break; + } + } + + if (chip == tmc1800 + && !current_SC->SCp.have_data_in + && (current_SC->SCp.sent_command + >= current_SC->cmd_len)) { + /* We have to get the FIFO direction + correct, so I've made a table based + on the SCSI Standard of which commands + appear to require a DATA OUT phase. + */ + /* + p. 94: Command for all device types + CHANGE DEFINITION 40 DATA OUT + COMPARE 39 DATA OUT + COPY 18 DATA OUT + COPY AND VERIFY 3a DATA OUT + INQUIRY 12 + LOG SELECT 4c DATA OUT + LOG SENSE 4d + MODE SELECT (6) 15 DATA OUT + MODE SELECT (10) 55 DATA OUT + MODE SENSE (6) 1a + MODE SENSE (10) 5a + READ BUFFER 3c + RECEIVE DIAGNOSTIC RESULTS 1c + REQUEST SENSE 03 + SEND DIAGNOSTIC 1d DATA OUT + TEST UNIT READY 00 + WRITE BUFFER 3b DATA OUT + + p.178: Commands for direct-access devices (not listed on p. 94) + FORMAT UNIT 04 DATA OUT + LOCK-UNLOCK CACHE 36 + PRE-FETCH 34 + PREVENT-ALLOW MEDIUM REMOVAL 1e + READ (6)/RECEIVE 08 + READ (10) 3c + READ CAPACITY 25 + READ DEFECT DATA (10) 37 + READ LONG 3e + REASSIGN BLOCKS 07 DATA OUT + RELEASE 17 + RESERVE 16 DATA OUT + REZERO UNIT/REWIND 01 + SEARCH DATA EQUAL (10) 31 DATA OUT + SEARCH DATA HIGH (10) 30 DATA OUT + SEARCH DATA LOW (10) 32 DATA OUT + SEEK (6) 0b + SEEK (10) 2b + SET LIMITS (10) 33 + START STOP UNIT 1b + SYNCHRONIZE CACHE 35 + VERIFY (10) 2f + WRITE (6)/PRINT/SEND 0a DATA OUT + WRITE (10)/SEND 2a DATA OUT + WRITE AND VERIFY (10) 2e DATA OUT + WRITE LONG 3f DATA OUT + WRITE SAME 41 DATA OUT ? + + p. 261: Commands for sequential-access devices (not previously listed) + ERASE 19 + LOAD UNLOAD 1b + LOCATE 2b + READ BLOCK LIMITS 05 + READ POSITION 34 + READ REVERSE 0f + RECOVER BUFFERED DATA 14 + SPACE 11 + WRITE FILEMARKS 10 ? + + p. 298: Commands for printer devices (not previously listed) + ****** NOT SUPPORTED BY THIS DRIVER, since 0b is SEEK (6) ***** + SLEW AND PRINT 0b DATA OUT -- same as seek + STOP PRINT 1b + SYNCHRONIZE BUFFER 10 + + p. 315: Commands for processor devices (not previously listed) + + p. 321: Commands for write-once devices (not previously listed) + MEDIUM SCAN 38 + READ (12) a8 + SEARCH DATA EQUAL (12) b1 DATA OUT + SEARCH DATA HIGH (12) b0 DATA OUT + SEARCH DATA LOW (12) b2 DATA OUT + SET LIMITS (12) b3 + VERIFY (12) af + WRITE (12) aa DATA OUT + WRITE AND VERIFY (12) ae DATA OUT + + p. 332: Commands for CD-ROM devices (not previously listed) + PAUSE/RESUME 4b + PLAY AUDIO (10) 45 + PLAY AUDIO (12) a5 + PLAY AUDIO MSF 47 + PLAY TRACK RELATIVE (10) 49 + PLAY TRACK RELATIVE (12) a9 + READ HEADER 44 + READ SUB-CHANNEL 42 + READ TOC 43 + + p. 370: Commands for scanner devices (not previously listed) + GET DATA BUFFER STATUS 34 + GET WINDOW 25 + OBJECT POSITION 31 + SCAN 1b + SET WINDOW 24 DATA OUT + + p. 391: Commands for optical memory devices (not listed) + ERASE (10) 2c + ERASE (12) ac + MEDIUM SCAN 38 DATA OUT + READ DEFECT DATA (12) b7 + READ GENERATION 29 + READ UPDATED BLOCK 2d + UPDATE BLOCK 3d DATA OUT + + p. 419: Commands for medium changer devices (not listed) + EXCHANGE MEDIUM 46 + INITIALIZE ELEMENT STATUS 07 + MOVE MEDIUM a5 + POSITION TO ELEMENT 2b + READ ELEMENT STATUS b8 + REQUEST VOL. ELEMENT ADDRESS b5 + SEND VOLUME TAG b6 DATA OUT + + p. 454: Commands for communications devices (not listed previously) + GET MESSAGE (6) 08 + GET MESSAGE (10) 28 + GET MESSAGE (12) a8 + */ + + switch (current_SC->cmnd[0]) { + case CHANGE_DEFINITION: case COMPARE: case COPY: + case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: + case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: + + case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: + case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: + case WRITE_6: case WRITE_10: case WRITE_VERIFY: + case 0x3f: case 0x41: + + case 0xb1: case 0xb0: case 0xb2: + case 0xaa: case 0xae: + + case 0x24: + + case 0x38: case 0x3d: + + case 0xb6: + + case 0xea: /* alternate number for WRITE LONG */ + + current_SC->SCp.have_data_in = -1; + outb( 0xd0 | PARITY_MASK, TMC_Cntl_port ); + break; + + case 0x00: + default: + + current_SC->SCp.have_data_in = 1; + outb( 0x90 | PARITY_MASK, TMC_Cntl_port ); + break; + } + } + + if (current_SC->SCp.have_data_in == -1) { /* DATA OUT */ + while ( (data_count = FIFO_Size - inw( FIFO_Data_Count_port )) > 512 ) { +#if EVERY_ACCESS + printk( "DC=%d, ", data_count ) ; +#endif + if (data_count > current_SC->SCp.this_residual) + data_count = current_SC->SCp.this_residual; + if (data_count > 0) { +#if EVERY_ACCESS + printk( "%d OUT, ", data_count ); +#endif + if (data_count == 1) { + outb( *current_SC->SCp.ptr++, Write_FIFO_port ); + --current_SC->SCp.this_residual; + } else { + data_count >>= 1; + outsw( Write_FIFO_port, current_SC->SCp.ptr, data_count ); + current_SC->SCp.ptr += 2 * data_count; + current_SC->SCp.this_residual -= 2 * data_count; + } + } + if (!current_SC->SCp.this_residual) { + if (current_SC->SCp.buffers_residual) { + --current_SC->SCp.buffers_residual; + ++current_SC->SCp.buffer; + current_SC->SCp.ptr = current_SC->SCp.buffer->address; + current_SC->SCp.this_residual = current_SC->SCp.buffer->length; + } else + break; + } + } + } + + if (current_SC->SCp.have_data_in == 1) { /* DATA IN */ + while ((data_count = inw( FIFO_Data_Count_port )) > 0) { +#if EVERY_ACCESS + printk( "DC=%d, ", data_count ); +#endif + if (data_count > current_SC->SCp.this_residual) + data_count = current_SC->SCp.this_residual; + if (data_count) { +#if EVERY_ACCESS + printk( "%d IN, ", data_count ); +#endif + if (data_count == 1) { + *current_SC->SCp.ptr++ = inb( Read_FIFO_port ); + --current_SC->SCp.this_residual; + } else { + data_count >>= 1; /* Number of words */ + insw( Read_FIFO_port, current_SC->SCp.ptr, data_count ); + current_SC->SCp.ptr += 2 * data_count; + current_SC->SCp.this_residual -= 2 * data_count; + } + } + if (!current_SC->SCp.this_residual + && current_SC->SCp.buffers_residual) { + --current_SC->SCp.buffers_residual; + ++current_SC->SCp.buffer; + current_SC->SCp.ptr = current_SC->SCp.buffer->address; + current_SC->SCp.this_residual = current_SC->SCp.buffer->length; + } + } + } + + if (done) { +#if EVERY_ACCESS + printk( " ** IN DONE %d ** ", current_SC->SCp.have_data_in ); +#endif + +#if ERRORS_ONLY + if (current_SC->cmnd[0] == REQUEST_SENSE && !current_SC->SCp.Status) { + if ((unsigned char)(*((char *)current_SC->request_buffer+2)) & 0x0f) { + unsigned char key; + unsigned char code; + unsigned char qualifier; + + key = (unsigned char)(*((char *)current_SC->request_buffer + 2)) + & 0x0f; + code = (unsigned char)(*((char *)current_SC->request_buffer + 12)); + qualifier = (unsigned char)(*((char *)current_SC->request_buffer + + 13)); + + if (key != UNIT_ATTENTION + && !(key == NOT_READY + && code == 0x04 + && (!qualifier || qualifier == 0x02 || qualifier == 0x01)) + && !(key == ILLEGAL_REQUEST && (code == 0x25 + || code == 0x24 + || !code))) + + printk( "fdomain: REQUEST SENSE " + "Key = %x, Code = %x, Qualifier = %x\n", + key, code, qualifier ); + } + } +#endif +#if EVERY_ACCESS + printk( "BEFORE MY_DONE. . ." ); +#endif + my_done( (current_SC->SCp.Status & 0xff) + | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16) ); +#if EVERY_ACCESS + printk( "RETURNING.\n" ); +#endif + + } else { + if (current_SC->SCp.phase & disconnect) { + outb( 0xd0 | FIFO_COUNT, Interrupt_Cntl_port ); + outb( 0x00, SCSI_Cntl_port ); + } else { + outb( 0x90 | FIFO_COUNT, Interrupt_Cntl_port ); + } + } +#if DEBUG_RACE + in_interrupt_flag = 0; +#endif + return; +} + +int fdomain_16x0_queue( Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *)) +{ + if (in_command) { + panic( "fdomain: fdomain_16x0_queue() NOT REENTRANT!\n" ); + } +#if EVERY_ACCESS + printk( "queue: target = %d cmnd = 0x%02x pieces = %d size = %u\n", + SCpnt->target, + *(unsigned char *)SCpnt->cmnd, + SCpnt->use_sg, + SCpnt->request_bufflen ); +#endif + + fdomain_make_bus_idle(); + + current_SC = SCpnt; /* Save this for the done function */ + current_SC->scsi_done = done; + + /* Initialize static data */ + + if (current_SC->use_sg) { + current_SC->SCp.buffer = + (struct scatterlist *)current_SC->request_buffer; + current_SC->SCp.ptr = current_SC->SCp.buffer->address; + current_SC->SCp.this_residual = current_SC->SCp.buffer->length; + current_SC->SCp.buffers_residual = current_SC->use_sg - 1; + } else { + current_SC->SCp.ptr = (char *)current_SC->request_buffer; + current_SC->SCp.this_residual = current_SC->request_bufflen; + current_SC->SCp.buffer = NULL; + current_SC->SCp.buffers_residual = 0; + } + + + current_SC->SCp.Status = 0; + current_SC->SCp.Message = 0; + current_SC->SCp.have_data_in = 0; + current_SC->SCp.sent_command = 0; + current_SC->SCp.phase = in_arbitration; + + /* Start arbitration */ + outb( 0x00, Interrupt_Cntl_port ); + outb( 0x00, SCSI_Cntl_port ); /* Disable data drivers */ + outb( adapter_mask, SCSI_Data_NoACK_port ); /* Set our id bit */ + ++in_command; + outb( 0x20, Interrupt_Cntl_port ); + outb( 0x14 | PARITY_MASK, TMC_Cntl_port ); /* Start arbitration */ + + return 0; +} + +/* The following code, which simulates the old-style command function, was + taken from Tommy Thorn's aha1542.c file. This code is Copyright (C) + 1992 Tommy Thorn. */ + +static volatile int internal_done_flag = 0; +static volatile int internal_done_errcode = 0; + +static void internal_done( Scsi_Cmnd *SCpnt ) +{ + internal_done_errcode = SCpnt->result; + ++internal_done_flag; +} + +int fdomain_16x0_command( Scsi_Cmnd *SCpnt ) +{ + fdomain_16x0_queue( SCpnt, internal_done ); + + while (!internal_done_flag) + ; + internal_done_flag = 0; + return internal_done_errcode; +} + +/* End of code derived from Tommy Thorn's work. */ + +void print_info( Scsi_Cmnd *SCpnt ) +{ + unsigned int imr; + unsigned int irr; + unsigned int isr; + + if (!SCpnt || !SCpnt->host) { + printk( "fdomain: cannot provide detailed information\n" ); + } + + printk( "%s\n", fdomain_16x0_info( SCpnt->host ) ); + print_banner( SCpnt->host ); + switch (SCpnt->SCp.phase) { + case in_arbitration: printk( "arbitration " ); break; + case in_selection: printk( "selection " ); break; + case in_other: printk( "other " ); break; + default: printk( "unknown " ); break; + } + + printk( "(%d), target = %d cmnd = 0x%02x pieces = %d size = %u\n", + SCpnt->SCp.phase, + SCpnt->target, + *(unsigned char *)SCpnt->cmnd, + SCpnt->use_sg, + SCpnt->request_bufflen ); + printk( "sent_command = %d, have_data_in = %d, timeout = %d\n", + SCpnt->SCp.sent_command, + SCpnt->SCp.have_data_in, + SCpnt->timeout ); +#if DEBUG_RACE + printk( "in_interrupt_flag = %d\n", in_interrupt_flag ); +#endif + + imr = (inb( 0x0a1 ) << 8) + inb( 0x21 ); + outb( 0x0a, 0xa0 ); + irr = inb( 0xa0 ) << 8; + outb( 0x0a, 0x20 ); + irr += inb( 0x20 ); + outb( 0x0b, 0xa0 ); + isr = inb( 0xa0 ) << 8; + outb( 0x0b, 0x20 ); + isr += inb( 0x20 ); + + /* Print out interesting information */ + printk( "IMR = 0x%04x", imr ); + if (imr & (1 << interrupt_level)) + printk( " (masked)" ); + printk( ", IRR = 0x%04x, ISR = 0x%04x\n", irr, isr ); + + printk( "SCSI Status = 0x%02x\n", inb( SCSI_Status_port ) ); + printk( "TMC Status = 0x%02x", inb( TMC_Status_port ) ); + if (inb( TMC_Status_port & 1)) + printk( " (interrupt)" ); + printk( "\n" ); + printk( "Interrupt Status = 0x%02x", inb( Interrupt_Status_port ) ); + if (inb( Interrupt_Status_port ) & 0x08) + printk( " (enabled)" ); + printk( "\n" ); + if (chip == tmc18c50 || chip == tmc18c30) { + printk( "FIFO Status = 0x%02x\n", inb( port_base + FIFO_Status ) ); + printk( "Int. Condition = 0x%02x\n", + inb( port_base + Interrupt_Cond ) ); + } + printk( "Configuration 1 = 0x%02x\n", inb( port_base + Configuration1 ) ); + if (chip == tmc18c50 || chip == tmc18c30) + printk( "Configuration 2 = 0x%02x\n", + inb( port_base + Configuration2 ) ); +} + +int fdomain_16x0_abort( Scsi_Cmnd *SCpnt) +{ + unsigned long flags; +#if EVERY_ACCESS || ERRORS_ONLY || DEBUG_ABORT + printk( "fdomain: abort " ); +#endif + + save_flags( flags ); + cli(); + if (!in_command) { +#if EVERY_ACCESS || ERRORS_ONLY + printk( " (not in command)\n" ); +#endif + restore_flags( flags ); + return SCSI_ABORT_NOT_RUNNING; + } else printk( "\n" ); + +#if DEBUG_ABORT + print_info( SCpnt ); +#endif + + fdomain_make_bus_idle(); + + current_SC->SCp.phase |= aborted; + + current_SC->result = DID_ABORT << 16; + + restore_flags( flags ); + + /* Aborts are not done well. . . */ + my_done( DID_ABORT << 16 ); + + return SCSI_ABORT_SUCCESS; +} + +int fdomain_16x0_reset( Scsi_Cmnd *SCpnt, unsigned int flags ) +{ +#if DEBUG_RESET + static int called_once = 0; +#endif + +#if ERRORS_ONLY + if (SCpnt) printk( "fdomain: SCSI Bus Reset\n" ); +#endif + +#if DEBUG_RESET + if (called_once) print_info( current_SC ); + called_once = 1; +#endif + + outb( 1, SCSI_Cntl_port ); + do_pause( 2 ); + outb( 0, SCSI_Cntl_port ); + do_pause( 115 ); + outb( 0, SCSI_Mode_Cntl_port ); + outb( PARITY_MASK, TMC_Cntl_port ); + + /* Unless this is the very first call (i.e., SCPnt == NULL), everything + is probably hosed at this point. We will, however, try to keep + things going by informing the high-level code that we need help. */ + + return SCSI_RESET_WAKEUP; +} + +#include "sd.h" +#include <scsi/scsi_ioctl.h> + +int fdomain_16x0_biosparam( Scsi_Disk *disk, kdev_t dev, int *info_array ) +{ + int drive; + unsigned char buf[512 + sizeof( int ) * 2]; + int size = disk->capacity; + int *sizes = (int *)buf; + unsigned char *data = (unsigned char *)(sizes + 2); + unsigned char do_read[] = { READ_6, 0, 0, 0, 1, 0 }; + int retcode; + struct drive_info { + unsigned short cylinders; + unsigned char heads; + unsigned char sectors; + } *i; + + /* NOTES: + The RAM area starts at 0x1f00 from the bios_base address. + + For BIOS Version 2.0: + + The drive parameter table seems to start at 0x1f30. + The first byte's purpose is not known. + Next is the cylinder, head, and sector information. + The last 4 bytes appear to be the drive's size in sectors. + The other bytes in the drive parameter table are unknown. + If anyone figures them out, please send me mail, and I will + update these notes. + + Tape drives do not get placed in this table. + + There is another table at 0x1fea: + If the byte is 0x01, then the SCSI ID is not in use. + If the byte is 0x18 or 0x48, then the SCSI ID is in use, + although tapes don't seem to be in this table. I haven't + seen any other numbers (in a limited sample). + + 0x1f2d is a drive count (i.e., not including tapes) + + The table at 0x1fcc are I/O ports addresses for the various + operations. I calculate these by hand in this driver code. + + + + For the ISA-200S version of BIOS Version 2.0: + + The drive parameter table starts at 0x1f33. + + WARNING: Assume that the table entry is 25 bytes long. Someone needs + to check this for the Quantum ISA-200S card. + + + + For BIOS Version 3.2: + + The drive parameter table starts at 0x1f70. Each entry is + 0x0a bytes long. Heads are one less than we need to report. + */ + + drive = MINOR(dev) / 16; + + if (bios_major == 2) { + switch (Quantum) { + case 2: /* ISA_200S */ + /* The value of 25 has never been verified. + It should probably be 15. */ + i = (struct drive_info *)( (char *)bios_base + 0x1f33 + drive * 25 ); + break; + case 3: /* ISA_250MG */ + i = (struct drive_info *)( (char *)bios_base + 0x1f36 + drive * 15 ); + break; + case 4: /* ISA_200S (another one) */ + i = (struct drive_info *)( (char *)bios_base + 0x1f34 + drive * 15 ); + break; + default: + i = (struct drive_info *)( (char *)bios_base + 0x1f31 + drive * 25 ); + break; + } + info_array[0] = i->heads; + info_array[1] = i->sectors; + info_array[2] = i->cylinders; + } else if (bios_major == 3 + && bios_minor >= 0 + && bios_minor < 4) { /* 3.0 and 3.2 BIOS */ + i = (struct drive_info *)( (char *)bios_base + 0x1f71 + drive * 10 ); + info_array[0] = i->heads + 1; + info_array[1] = i->sectors; + info_array[2] = i->cylinders; + } else { /* 3.4 BIOS (and up?) */ + /* This algorithm was provided by Future Domain (much thanks!). */ + + sizes[0] = 0; /* zero bytes out */ + sizes[1] = 512; /* one sector in */ + memcpy( data, do_read, sizeof( do_read ) ); + retcode = kernel_scsi_ioctl( disk->device, + SCSI_IOCTL_SEND_COMMAND, + (void *)buf ); + if (!retcode /* SCSI command ok */ + && data[511] == 0xaa && data[510] == 0x55 /* Partition table valid */ + && data[0x1c2]) { /* Partition type */ + + /* The partition table layout is as follows: + + Start: 0x1b3h + Offset: 0 = partition status + 1 = starting head + 2 = starting sector and cylinder (word, encoded) + 4 = partition type + 5 = ending head + 6 = ending sector and cylinder (word, encoded) + 8 = starting absolute sector (double word) + c = number of sectors (double word) + Signature: 0x1fe = 0x55aa + + So, this algorithm assumes: + 1) the first partition table is in use, + 2) the data in the first entry is correct, and + 3) partitions never divide cylinders + + Note that (1) may be FALSE for NetBSD (and other BSD flavors), + as well as for Linux. Note also, that Linux doesn't pay any + attention to the fields that are used by this algorithm -- it + only uses the absolute sector data. Recent versions of Linux's + fdisk(1) will fill this data in correctly, and forthcoming + versions will check for consistency. + + Checking for a non-zero partition type is not part of the + Future Domain algorithm, but it seemed to be a reasonable thing + to do, especially in the Linux and BSD worlds. */ + + info_array[0] = data[0x1c3] + 1; /* heads */ + info_array[1] = data[0x1c4] & 0x3f; /* sectors */ + } else { + + /* Note that this new method guarantees that there will always be + less than 1024 cylinders on a platter. This is good for drives + up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */ + + if ((unsigned int)size >= 0x7e0000U) { + info_array[0] = 0xff; /* heads = 255 */ + info_array[1] = 0x3f; /* sectors = 63 */ + } else if ((unsigned int)size >= 0x200000U) { + info_array[0] = 0x80; /* heads = 128 */ + info_array[1] = 0x3f; /* sectors = 63 */ + } else { + info_array[0] = 0x40; /* heads = 64 */ + info_array[1] = 0x20; /* sectors = 32 */ + } + } + /* For both methods, compute the cylinders */ + info_array[2] = (unsigned int)size / (info_array[0] * info_array[1] ); + } + + return 0; +} + +#ifdef MODULE +/* Eventually this will go into an include file, but this will be later */ +Scsi_Host_Template driver_template = FDOMAIN_16X0; + +#include "scsi_module.c" +#endif |