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kernel / pub / scm / linux / kernel / git / wtarreau / linux-2.4 / refs/tags/v2.4.37.11 / . / drivers / scsi / sim710.c
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/*
* sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
*
*----------------------------------------------------------------------------
* 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 of the License, 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.
*----------------------------------------------------------------------------
*
* MCA card detection code by Trent McNair.
* Fixes to not explicitly nul bss data from Xavier Bestel.
* Some multiboard fixes from Rolf Eike Beer.
* Auto probing of EISA config space from Trevor Hemsley.
*
* Various bits of code in this driver have been copied from 53c7,8xx,c,
* which is coyright Drew Eckhardt. The scripts for the SCSI chip are
* compiled with the script compiler written by Drew.
*
* This is a simple driver for the NCR53c710. More complex drivers
* for this chip (e.g. 53c7xx.c) require that the scsi chip be able to
* do DMA block moves between memory and on-chip registers, which can
* be a problem if those registers are in the I/O address space. There
* can also be problems on hardware where the registers are memory
* mapped, if the design is such that memory-to-memory transfers initiated
* by the scsi chip cannot access the chip registers.
*
* This driver is designed to avoid these problems and is intended to
* work with any Intel machines using 53c710 chips, including various
* Compaq and NCR machines. It was initially written for the Tadpole
* TP34V VME board which is 68030 based.
*
* The driver supports boot-time parameters similar to
* sim710=addr:0x9000,irq:15
* and insmod parameters similar to
* sim710="addr:0x9000 irq:15"
*
* Multiple controllers can also be set up by command line, provided the
* addr: parameter is specified first for each controller. e.g.
* sim710="addr:0x9000 irq:15 addr:0x8000 irq:14"
*
* To seperate the different options, ' ', '+', and ',' can be used, except
* that ',' can not be used in module parameters. ' ' can be a pain, because
* it needs to be quoted, which causes problems with some installers.
* The command line above is completely equivalent to
* sim710="addr:0x9000+irq:15+addr:0x8000+irq:14"
*
* The complete list of options are:
*
* addr:0x9000 Specifies the base I/O port (or address) of the 53C710.
* irq:15 Specifies the IRQ number used by the 53c710.
* debug:0xffff Generates lots of debug output.
* ignore:0x0a Makes the driver ignore SCSI IDs 0 and 2.
* nodisc:0x70 Prevents disconnects from IDs 6, 5 and 4.
* noneg:0x10 Prevents SDTR negotiation on ID 4.
* disabled:1 Completely disables the driver. When present, overrides
* all other options.
*
* The driver will auto-probe chip addresses and IRQs now, so typically no
* parameters are needed. Auto-probing of addresses is disabled if any addr:
* parameters are specified.
*
* Current limitations:
*
* o Async only
* o Severely lacking in error recovery
* o 'debug:' should be per host really.
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/mca.h>
#include <linux/interrupt.h>
#include <asm/dma.h>
#include <asm/system.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/byteorder.h>
#include <linux/blk.h>
/* All targets are I/O mapped at the moment */
#define IO_MAPPED
#if defined(CONFIG_MCA)
/*
* For each known microchannel card using the 53c710 we need a list
* of possible IRQ and IO settings, as well as their corresponding
* bit assignment in pos[]. This might get cumbersome if there
* are more than a few cards (I only know of 2 at this point).
*/
#define MCA_53C710_IDS { 0x01bb, 0x01ba, 0x004f }
/* CARD ID 01BB and 01BA use the same pos values */
#define MCA_01BB_IO_PORTS { 0x0000, 0x0000, 0x0800, 0x0C00, 0x1000, 0x1400, \
0x1800, 0x1C00, 0x2000, 0x2400, 0x2800, \
0x2C00, 0x3000, 0x3400, 0x3800, 0x3C00, \
0x4000, 0x4400, 0x4800, 0x4C00, 0x5000 }
#define MCA_01BB_IRQS { 3, 5, 11, 14 }
/* CARD ID 004f */
#define MCA_004F_IO_PORTS { 0x0000, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600 }
#define MCA_004F_IRQS { 5, 9, 14 }
#endif
#include "scsi.h"
#include "hosts.h"
#include "sim710.h"
#include<linux/stat.h>
#define DEBUG
#undef DEBUG_LIMIT_INTS /* Define to 10 to hang driver after 10 ints */
/* Debug options available via the "debug:0x1234" parameter */
#define DEB_NONE 0x0000 /* Nothing */
#define DEB_HALT 0x0001 /* Detailed trace of chip halt funtion */
#define DEB_REGS 0x0002 /* All chip register read/writes */
#define DEB_SYNC 0x0004 /* Sync/async negotiation */
#define DEB_PMM 0x0008 /* Phase mis-match handling */
#define DEB_INTS 0x0010 /* General interrupt trace */
#define DEB_TOUT 0x0020 /* Selection timeouts */
#define DEB_RESUME 0x0040 /* Resume addresses for the script */
#define DEB_CMND 0x0080 /* Commands and status returned */
#define DEB_FIXUP 0x0100 /* Fixup of scsi addresses */
#define DEB_DISC 0x0200 /* Disconnect/reselect handling */
#define DEB_ANY 0xffff /* Any and all debug options */
#ifdef DEBUG
#define DEB(m,x) if (sim710_debug & m) x
int sim710_debug;
#else
#define DEB(m,x)
#endif
/* Redefine scsi_done to force renegotiation of (a)sync transfers
* following any failed command.
*/
#define SCSI_DONE(cmd) { \
DEB(DEB_CMND, printk("scsi%d: Complete %08x\n", \
host->host_no, cmd->result)); \
if (cmd->result) \
hostdata->negotiate |= (1 << cmd->target); \
cmd->scsi_done(cmd); \
}
#ifndef offsetof
#define offsetof(t, m) ((size_t) (&((t *)0)->m))
#endif
#define STATE_INITIALISED 0
#define STATE_HALTED 1
#define STATE_IDLE 2
#define STATE_BUSY 3
#define STATE_DISABLED 4
#define MAXBOARDS 4 /* Increase this and the sizes of the
arrays below, if you need more.. */
#ifdef MODULE
char *sim710; /* command line passed by insmod */
MODULE_AUTHOR("Richard Hirst");
MODULE_DESCRIPTION("Simple NCR53C710 driver");
MODULE_LICENSE("GPL");
MODULE_PARM(sim710, "s");
#endif
static int sim710_errors; /* Count of error interrupts */
static int sim710_intrs; /* Count of all interrupts */
static int ignore_ids[MAXBOARDS]; /* Accept all SCSI IDs */
static int opt_nodisc[MAXBOARDS]; /* Allow disconnect on all IDs */
static int opt_noneg[MAXBOARDS]; /* Allow SDTR negotiation on all IDs */
static int hostdata_order; /* Encoded size of hostdata for free_pages() */
static int no_of_boards; /* Actual number of boards/chips */
static unsigned int bases[MAXBOARDS]; /* Base addresses of chips */
static unsigned int irq_vectors[MAXBOARDS]; /* IRQ vectors used by chips */
/* The SCSI Script!!! */
#include "sim710_d.h"
/* Now define offsets in the DSA, as (A_dsa_xxx/4) */
#define DSA_SELECT (A_dsa_select/4)
#define DSA_MSGOUT (A_dsa_msgout/4)
#define DSA_CMND (A_dsa_cmnd/4)
#define DSA_STATUS (A_dsa_status/4)
#define DSA_MSGIN (A_dsa_msgin/4)
#define DSA_DATAIN (A_dsa_datain/4)
#define DSA_DATAOUT (A_dsa_dataout/4)
#define DSA_SIZE (A_dsa_size/4)
#define MAX_SG 128 /* Scatter/Gather elements */
#define MAX_MSGOUT 8
#define MAX_MSGIN 8
#define MAX_CMND 12
#define MAX_STATUS 1
struct sim710_hostdata{
int state;
Scsi_Cmnd * issue_queue;
Scsi_Cmnd * running;
int chip;
u8 negotiate;
u8 reselected_identify;
u8 msgin_buf[MAX_MSGIN];
u8 msg_reject;
u32 test1_src __attribute__ ((aligned (4)));
u32 test1_dst;
struct sim710_target {
Scsi_Cmnd *cur_cmd;
u32 resume_offset;
u32 data_in_jump;
u32 data_out_jump;
u32 dsa[DSA_SIZE]; /* SCSI Script DSA area */
u8 dsa_msgout[MAX_MSGOUT];
u8 dsa_msgin[MAX_MSGIN];
u8 dsa_cdb[MAX_CMND];
u8 dsa_status[MAX_STATUS];
} target[8];
u32 script[sizeof(SCRIPT)/4] __attribute__ ((aligned (4)));
};
/* Template to request asynchronous transfers */
static const unsigned char async_message[] = {
EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 0, 0 /* asynchronous */};
static void sim710_intr_handle(int irq, void *dev_id, struct pt_regs *regs);
static void do_sim710_intr_handle(int irq, void *dev_id, struct pt_regs *regs);
static __inline__ void run_process_issue_queue(struct sim710_hostdata *);
static void process_issue_queue (struct sim710_hostdata *, unsigned long flags);
static int full_reset(struct Scsi_Host * host);
/*
* Function : static void ncr_dump (struct Scsi_Host *host)
*
* Purpose : Dump (possibly) useful info
*
* Inputs : host - pointer to this host adapter's structure
*/
static void
ncr_dump (struct Scsi_Host *host)
{
unsigned long flags;
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)
host->hostdata[0];
save_flags(flags);
cli();
printk("scsi%d: Chip register contents:\n", host->host_no);
printk(" (script at virt %p, bus %lx)\n",
hostdata->script, virt_to_bus(hostdata->script));
printk(" 00 sien: %02x sdid: %02x scntl1:%02x scntl0:%02x\n"
" 04 socl: %02x sodl: %02x sxfer: %02x scid: %02x\n"
" 08 sbcl: %02x sbdl: %02x sidl: %02x sfbr: %02x\n"
" 0C sstat2:%02x sstat1:%02x sstat0:%02x dstat: %02x\n"
" 10 dsa: %08x\n"
" 14 ctest3:%02x ctest2:%02x ctest1:%02x ctest0:%02x\n"
" 18 ctest7:%02x ctest6:%02x ctest5:%02x ctest4:%02x\n"
" 1C temp: %08x\n"
" 20 lcrc: %02x ctest8:%02x istat: %02x dfifo: %02x\n"
" 24 dbc: %08x dnad: %08x dsp: %08x\n"
" 30 dsps: %08x scratch:%08x\n"
" 38 dcntl: %02x dwt: %02x dien: %02x dmode: %02x\n"
" 3C adder: %08x\n",
NCR_read8(SIEN_REG), NCR_read8(SDID_REG), NCR_read8(SCNTL1_REG),
NCR_read8(SCNTL0_REG), NCR_read8(SOCL_REG), NCR_read8(SODL_REG),
NCR_read8(SXFER_REG), NCR_read8(SCID_REG), NCR_read8(SBCL_REG),
NCR_read8(SBDL_REG), NCR_read8(SIDL_REG), NCR_read8(SFBR_REG),
NCR_read8(SSTAT2_REG), NCR_read8(SSTAT1_REG), NCR_read8(SSTAT0_REG),
NCR_read8(DSTAT_REG), NCR_read32(DSA_REG), NCR_read8(CTEST3_REG),
NCR_read8(CTEST2_REG), NCR_read8(CTEST1_REG), NCR_read8(CTEST0_REG),
NCR_read8(CTEST7_REG), NCR_read8(CTEST6_REG), NCR_read8(CTEST5_REG),
NCR_read8(CTEST4_REG), NCR_read8(TEMP_REG), NCR_read8(LCRC_REG),
NCR_read8(CTEST8_REG), NCR_read8(ISTAT_REG), NCR_read8(DFIFO_REG),
NCR_read32(DBC_REG), NCR_read32(DNAD_REG), NCR_read32(DSP_REG),
NCR_read32(DSPS_REG), NCR_read32(SCRATCH_REG), NCR_read8(DCNTL_REG),
NCR_read8(DWT_REG), NCR_read8(DIEN_REG), NCR_read8(DMODE_REG),
NCR_read32(ADDER_REG));
restore_flags(flags);
}
/*
* Function: int param_setup(char *str)
*/
__init int
param_setup(char *str)
{
char *cur = str;
char *p, *pc, *pv;
int val;
int c;
no_of_boards = 0;
while (no_of_boards < MAXBOARDS && cur != NULL &&
(pc = strchr(cur, ':')) != NULL) {
char *pe;
val = 0;
pv = pc;
c = *++pv;
val = (int) simple_strtoul(pv, &pe, 0);
if (!strncmp(cur, "addr:", 5)) {
bases[no_of_boards++] = val;
}
#ifdef DEBUG
else if (!strncmp(cur, "debug:", 6)) {
sim710_debug = val;
}
#endif
else if (no_of_boards == 0) {
printk("sim710: Invalid parameters, addr: must come first\n");
no_of_boards = -1;
return 1;
}
else if (!strncmp(cur, "irq:", 4))
irq_vectors[no_of_boards-1] = val;
else if (!strncmp(cur, "ignore:", 7))
ignore_ids[no_of_boards-1] = val;
else if (!strncmp(cur, "nodisc:", 7))
opt_nodisc[no_of_boards-1] = val;
else if (!strncmp(cur, "noneg:", 6))
opt_noneg[no_of_boards-1] = val;
else if (!strncmp(cur, "disabled:", 9)) {
no_of_boards = -1;
return 1;
}
else {
printk("sim710: unexpected boot option '%.*s'\n", (int)(pc-cur+1), cur);
no_of_boards = -1;
return 1;
}
/* Allow ',', ' ', or '+' seperators. Used to be ',' at boot and
* ' ' for module load, some installers crap out on the space and
* insmod doesn't like the comma.
*/
if ((p = strchr(cur, ',')) || (p = strchr(cur, ' ')) ||
(p = strchr(cur, '+')))
cur = p + 1;
else
break;
}
return 1;
}
#ifndef MODULE
__setup("sim710=", param_setup);
#endif
/*
* Function: static const char *sbcl_to_phase (int sbcl)
*/
static const char *
sbcl_to_phase (int sbcl) {
switch (sbcl & SBCL_PHASE_MASK) {
case SBCL_PHASE_DATAIN:
return "DATAIN";
case SBCL_PHASE_DATAOUT:
return "DATAOUT";
case SBCL_PHASE_MSGIN:
return "MSGIN";
case SBCL_PHASE_MSGOUT:
return "MSGOUT";
case SBCL_PHASE_CMDOUT:
return "CMDOUT";
case SBCL_PHASE_STATIN:
return "STATUSIN";
default:
return "unknown";
}
}
/*
* Function : static int ncr_halt (struct Scsi_Host *host)
*
* Purpose : halts the SCSI SCRIPTS(tm) processor on the NCR chip
*
* Inputs : host - SCSI chip to halt
*
* Returns : 0 on success
*/
static int
ncr_halt (struct Scsi_Host *host)
{
unsigned long flags;
unsigned char istat, tmp;
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)
host->hostdata[0];
int stage;
int timeout;
int res = 0;
save_flags(flags);
cli();
/* Stage 0 : eat all interrupts
Stage 1 : set ABORT
Stage 2 : eat all but abort interrupts
Stage 3 : eat all interrupts
We loop for 50000 times with a delay of 10us which should give us
about half a second.
*/
for (stage = 0, timeout = 50000; timeout; timeout--) {
if (stage == 1) {
DEB(DEB_HALT, printk("ncr_halt: writing ISTAT_ABRT\n"));
NCR_write8(ISTAT_REG, ISTAT_ABRT);
++stage;
}
istat = NCR_read8 (ISTAT_REG);
if (istat & ISTAT_SIP) {
DEB(DEB_HALT, printk("ncr_halt: got ISTAT_SIP, istat=%02x\n", istat));
tmp = NCR_read8(SSTAT0_REG);
DEB(DEB_HALT, printk("ncr_halt: got SSTAT0_REG=%02x\n", tmp));
} else if (istat & ISTAT_DIP) {
DEB(DEB_HALT, printk("ncr_halt: got ISTAT_DIP, istat=%02x\n", istat));
tmp = NCR_read8(DSTAT_REG);
DEB(DEB_HALT, printk("ncr_halt: got DSTAT_REG=%02x\n", tmp));
if (stage == 2) {
if (tmp & DSTAT_ABRT) {
DEB(DEB_HALT, printk("ncr_halt: got DSTAT_ABRT, clearing istat\n"));
NCR_write8(ISTAT_REG, 0);
++stage;
} else {
res = 1;
break;
}
}
}
if (!(istat & (ISTAT_SIP|ISTAT_DIP))) {
if (stage == 0)
++stage;
else if (stage == 3)
break;
}
udelay(10);
}
restore_flags(flags);
if (timeout == 0 || res) {
printk(KERN_ALERT "scsi%d: could not halt NCR chip\n", host->host_no);
return 1;
}
else {
hostdata->state = STATE_HALTED;
return 0;
}
}
/*
* Function : static void sim710_soft_reset (struct Scsi_Host *host)
*
* Purpose : perform a soft reset of the NCR53c7xx chip
*
* Inputs : host - pointer to this host adapter's structure
*
* Preconditions : sim710_init must have been called for this
* host.
*
*/
static void
sim710_soft_reset (struct Scsi_Host *host)
{
unsigned long flags;
save_flags(flags);
cli();
/*
* Do a soft reset of the chip so that everything is
* reinitialized to the power-on state.
*
* Basically follow the procedure outlined in the NCR53c700
* data manual under Chapter Six, How to Use, Steps Necessary to
* Start SCRIPTS, with the exception of actually starting the
* script and setting up the synchronous transfer gunk.
*/
/* XXX Should we reset the scsi bus here? */
NCR_write8(SCNTL1_REG, SCNTL1_RST); /* Reset the bus */
udelay(50);
NCR_write8(SCNTL1_REG, 0);
udelay(500);
NCR_write8(ISTAT_REG, ISTAT_10_SRST); /* Reset the chip */
udelay(50);
NCR_write8(ISTAT_REG, 0);
mdelay(1000); /* Let devices recover */
NCR_write32(SCRATCH_REG, 0);
NCR_write8(DCNTL_REG, DCNTL_10_COM | DCNTL_700_CF_3);
NCR_write8(CTEST7_REG, CTEST7_10_CDIS|CTEST7_STD);
NCR_write8(DMODE_REG, DMODE_10_BL_8 | DMODE_10_FC2);
NCR_write8(SCID_REG, 1 << host->this_id);
NCR_write8(SBCL_REG, 0);
NCR_write8(SXFER_REG, 0);
NCR_write8(SCNTL1_REG, SCNTL1_ESR_700);
NCR_write8(SCNTL0_REG, SCNTL0_EPC | SCNTL0_EPG_700 | SCNTL0_ARB1 |
SCNTL0_ARB2);
NCR_write8(DIEN_REG, DIEN_700_BF |
DIEN_ABRT | DIEN_SSI | DIEN_SIR | DIEN_700_OPC);
NCR_write8(SIEN_REG_700,
SIEN_PAR | SIEN_700_STO | SIEN_RST | SIEN_UDC | SIEN_SGE | SIEN_MA);
restore_flags(flags);
}
/*
* Function : static void sim710_driver_init (struct Scsi_Host *host)
*
* Purpose : Initialize internal structures, as required on startup, or
* after a SCSI bus reset.
*
* Inputs : host - pointer to this host adapter's structure
*/
static void
sim710_driver_init (struct Scsi_Host *host)
{
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)
host->hostdata[0];
int i;
hostdata->running = NULL;
memcpy (hostdata->script, SCRIPT, sizeof(SCRIPT));
for (i = 0; i < PATCHES; i++)
hostdata->script[LABELPATCHES[i]] += virt_to_bus(hostdata->script);
patch_abs_32 (hostdata->script, 0, reselected_identify,
virt_to_bus((void *)&(hostdata->reselected_identify)));
patch_abs_32 (hostdata->script, 0, msgin_buf,
virt_to_bus((void *)&(hostdata->msgin_buf[0])));
patch_abs_32 (hostdata->script, 0, msg_reject,
virt_to_bus((void *)&(hostdata->msg_reject)));
patch_abs_32 (hostdata->script, 0, test1_src,
virt_to_bus((void *)&(hostdata->test1_src)));
patch_abs_32 (hostdata->script, 0, test1_dst,
virt_to_bus((void *)&(hostdata->test1_dst)));
hostdata->state = STATE_INITIALISED;
hostdata->negotiate = 0xff;
}
/* Handle incoming Synchronous data transfer request. If our negotiate
* flag is set then this is a response to our request, otherwise it is
* spurious request from the target. Don't really expect target initiated
* SDTRs, because we always negotiate on the first command. Could still
* get them though..
* The chip is currently paused with ACK asserted on the last byte of the
* SDTR.
* resa is the resume address if the message is in response to our outgoing
* SDTR. Only possible on initial identify.
* resb is the resume address if the message exchange is initiated by the
* target.
*/
static u32
handle_sdtr (struct Scsi_Host * host, Scsi_Cmnd * cmd, u32 resa, u32 resb)
{
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)host->hostdata[0];
struct sim710_target *targdata = hostdata->target + cmd->target;
u32 resume_offset;
if (resa && hostdata->negotiate & (1 << cmd->target)) {
DEB(DEB_SYNC, printk("scsi%d: Response to host SDTR = %02x %02x\n",
host->host_no, hostdata->msgin_buf[3], hostdata->msgin_buf[4]));
/* We always issue an SDTR with the identify, so we must issue
* the CDB next.
*/
resume_offset = resa;
hostdata->negotiate &= ~(1 << cmd->target);
}
else {
DEB(DEB_SYNC, printk("scsi%d: Target initiated SDTR = %02x %02x\n",
host->host_no, hostdata->msgin_buf[3], hostdata->msgin_buf[4]));
memcpy(targdata->dsa_msgout, async_message, sizeof(async_message));
targdata->dsa[DSA_MSGOUT] = sizeof(async_message);
/* I guess the target could do this anytime; we have to send our
* response, and then continue (sending the CDB if not already done).
*/
resume_offset = resb;
}
return resume_offset;
}
/*
* Function : static int datapath_residual (Scsi_Host *host)
*
* Purpose : return residual data count of what's in the chip.
*
* Inputs : host - SCSI host
*/
static int
datapath_residual (struct Scsi_Host *host) {
int count, synchronous, sstat;
unsigned int ddir;
count = ((NCR_read8 (DFIFO_REG) & DFIFO_10_BO_MASK) -
(NCR_read32 (DBC_REG) & DFIFO_10_BO_MASK)) & DFIFO_10_BO_MASK;
synchronous = NCR_read8 (SXFER_REG) & SXFER_MO_MASK;
ddir = NCR_read8 (CTEST0_REG_700) & CTEST0_700_DDIR;
if (ddir) {
/* Receive */
if (synchronous)
count += (NCR_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT;
else
if (NCR_read8 (SSTAT1_REG) & SSTAT1_ILF)
++count;
} else {
/* Send */
sstat = NCR_read8 (SSTAT1_REG);
if (sstat & SSTAT1_OLF)
++count;
if (synchronous && (sstat & SSTAT1_ORF))
++count;
}
return count;
}
static u32
handle_idd (struct Scsi_Host * host, Scsi_Cmnd * cmd)
{
struct sim710_hostdata *hostdata =
(struct sim710_hostdata *)host->hostdata[0];
struct sim710_target *targdata = hostdata->target + cmd->target;
u32 resume_offset = 0, index;
index = (u32)((u32 *)(bus_to_virt(NCR_read32(DSP_REG))) - hostdata->script);
switch (index) {
case Ent_wait_disc_complete/4 + 2:
cmd->result = targdata->dsa_status[0];
SCSI_DONE(cmd);
targdata->cur_cmd = NULL;
resume_offset = Ent_reselect;
break;
case Ent_wait_disc2/4 + 2:
/* Disconnect after command - just wait for a reselect */
targdata->resume_offset = Ent_resume_msgin2a;
resume_offset = Ent_reselect;
break;
case Ent_wait_disc3/4 + 2:
/* Disconnect after the data phase */
targdata->resume_offset = Ent_resume_msgin3a;
resume_offset = Ent_reselect;
break;
case Ent_wait_disc1/4 + 2:
/* Disconnect before command - not expected */
targdata->resume_offset = Ent_resume_msgin1a;
resume_offset = Ent_reselect;
break;
default:
printk("scsi%d: Unexpected Illegal Instruction, script[%04x]\n",
host->host_no, index);
sim710_errors++;
/* resume_offset is zero, which will cause host reset */
}
return resume_offset;
}
/* Handle a phase mismatch.
*/
static u32
handle_phase_mismatch (struct Scsi_Host * host, Scsi_Cmnd * cmd)
{
struct sim710_hostdata *hostdata =
(struct sim710_hostdata *)host->hostdata[0];
struct sim710_target *targdata = hostdata->target + cmd->target;
u32 resume_offset = 0, index;
unsigned char sbcl;
sbcl = NCR_read8(SBCL_REG) & SBCL_PHASE_MASK;
index = (u32)((u32 *)(bus_to_virt(NCR_read32(DSP_REG))) - hostdata->script);
DEB(DEB_PMM, printk("scsi%d: Phase mismatch, phase %s (%x) at script[0x%x]\n",
host->host_no, sbcl_to_phase(sbcl), sbcl, index));
DEB(DEB_PMM, print_command(cmd->cmnd));
if (index == Ent_done_ident/4) {
/* Sending initial message out - probably rejecting our sync
* negotiation request.
*/
NCR_write8(SOCL_REG, 0); /* Negate ATN */
if (sbcl == SBCL_PHASE_MSGIN)
resume_offset = Ent_resume_rej_ident;
else if (sbcl == SBCL_PHASE_CMDOUT) {
/* Some old devices (SQ555) switch to cmdout after the first
* byte of an identify message, regardless of whether we
* have more bytes to send!
*/
printk("scsi%d: Unexpected switch to CMDOUT during IDENTIFY\n",
host->host_no);
resume_offset = Ent_resume_cmd;
}
else if (sbcl == SBCL_PHASE_STATIN) {
/* Some devices do this on parity error, at least */
printk("scsi%d: Unexpected switch to STATUSIN on initial message out\n",
host->host_no);
resume_offset = Ent_end_data_trans;
}
else {
printk("scsi%d: Unexpected phase change to %s on initial msgout\n",
host->host_no, sbcl_to_phase(sbcl));
/* resume_offset is zero, which will cause a host reset */
}
hostdata->negotiate &= ~(1 << cmd->target);
}
else if (index > Ent_patch_input_data/4 &&
index < Ent_patch_output_data/4) {
/* DataIn transfer phase */
u32 sg_id, oaddr, olen, naddr, nlen;
int residual;
sg_id = (index - Ent_patch_input_data/4 - 4) / 2;
targdata->data_in_jump = hostdata->script[Ent_patch_input_data/4+1] =
virt_to_bus(hostdata->script + Ent_patch_input_data/4 + sg_id * 2 + 2);
olen = targdata->dsa[DSA_DATAIN + sg_id * 2];
oaddr = targdata->dsa[DSA_DATAIN + sg_id * 2 + 1];
residual = datapath_residual (host);
if (residual)
printk("scsi%d: Residual count %d on DataIn - NOT expected!!!",
host->host_no, residual);
naddr = NCR_read32(DNAD_REG) - residual;
nlen = (NCR_read32(DBC_REG) & 0x00ffffff) + residual;
DEB(DEB_PMM, printk("scsi%d: DIN sg %d, old %08x/%08x, new %08x/%08x (%d)\n",
host->host_no, sg_id, oaddr, olen, naddr, nlen, residual));
if (oaddr+olen != naddr+nlen) {
printk("scsi%d: PMM DIN counts error: 0x%x + 0x%x != 0x%x + 0x%x",
host->host_no, oaddr, olen, naddr, nlen);
}
else {
targdata->dsa[DSA_DATAIN + sg_id * 2] = nlen;
targdata->dsa[DSA_DATAIN + sg_id * 2 + 1] = naddr;
resume_offset = Ent_resume_pmm;
}
}
else if (index > Ent_patch_output_data/4 &&
index <= Ent_end_data_trans/4) {
/* Dataout transfer phase */
u32 sg_id, oaddr, olen, naddr, nlen;
int residual;
sg_id = (index - Ent_patch_output_data/4 - 4) / 2;
targdata->data_out_jump = hostdata->script[Ent_patch_output_data/4+1] =
virt_to_bus(hostdata->script + Ent_patch_output_data/4 + sg_id * 2 + 2);
olen = targdata->dsa[DSA_DATAOUT + sg_id * 2];
oaddr = targdata->dsa[DSA_DATAOUT + sg_id * 2 + 1];
residual = datapath_residual (host);
naddr = NCR_read32(DNAD_REG) - residual;
nlen = (NCR_read32(DBC_REG) & 0x00ffffff) + residual;
DEB(DEB_PMM, printk("scsi%d: DOUT sg %d, old %08x/%08x, new %08x/%08x (%d)\n",
host->host_no, sg_id, oaddr, olen, naddr, nlen, residual));
if (oaddr+olen != naddr+nlen) {
printk("scsi%d: PMM DOUT counts error: 0x%x + 0x%x != 0x%x + 0x%x",
host->host_no, oaddr, olen, naddr, nlen);
}
else {
targdata->dsa[DSA_DATAOUT + sg_id * 2] = nlen;
targdata->dsa[DSA_DATAOUT + sg_id * 2 + 1] = naddr;
resume_offset = Ent_resume_pmm;
}
}
else if (sbcl == SBCL_PHASE_STATIN) {
/* Change to Status In at some random point; probably wants to report a
* parity error or similar.
*/
printk("scsi%d: Unexpected phase change to STATUSIN at index 0x%x\n",
host->host_no, index);
resume_offset = Ent_end_data_trans;
}
else {
printk("scsi%d: Unexpected phase change to %s at index 0x%x\n",
host->host_no, sbcl_to_phase(sbcl), index);
/* resume_offset is zero, which will cause a host reset */
}
/* Flush DMA FIFO */
NCR_write8 (CTEST8_REG, CTEST8_10_CLF);
while (NCR_read8 (CTEST8_REG) & CTEST8_10_CLF);
return resume_offset;
}
static u32
handle_script_int(struct Scsi_Host * host, Scsi_Cmnd * cmd)
{
struct sim710_hostdata *hostdata =
(struct sim710_hostdata *)host->hostdata[0];
struct sim710_target *targdata = hostdata->target + cmd->target;
u32 dsps, resume_offset = 0;
unsigned char sbcl;
dsps = NCR_read32(DSPS_REG);
switch (dsps) {
case A_int_cmd_complete:
cmd->result = targdata->dsa_status[0];
SCSI_DONE(cmd);
targdata->cur_cmd = NULL;
resume_offset = Ent_reselect;
break;
case A_int_msg_sdtr1:
resume_offset = handle_sdtr(host, cmd,
Ent_resume_msgin1a, Ent_resume_msgin1b);
break;
case A_int_msg_sdtr2:
resume_offset = handle_sdtr(host, cmd, 0, Ent_resume_msgin2b);
break;
case A_int_msg_sdtr3:
resume_offset = handle_sdtr(host, cmd, 0, Ent_resume_msgin3b);
break;
case A_int_disc1:
/* Disconnect before command - not expected */
targdata->resume_offset = Ent_resume_msgin1a;
resume_offset = Ent_reselect;
break;
case A_int_disc2:
/* Disconnect after command - just wait for a reselect */
targdata->resume_offset = Ent_resume_msgin2a;
resume_offset = Ent_reselect;
break;
case A_int_disc3:
/* Disconnect after the data phase */
targdata->resume_offset = Ent_resume_msgin3a;
resume_offset = Ent_reselect;
break;
case A_int_reselected:
hostdata->script[Ent_patch_output_data/4+1] = targdata->data_out_jump;
hostdata->script[Ent_patch_input_data/4+1] = targdata->data_in_jump;
NCR_write32(DSA_REG, virt_to_bus(targdata->dsa));
resume_offset = targdata->resume_offset;
break;
case A_int_data_bad_phase:
sbcl = NCR_read8(SBCL_REG) & SBCL_PHASE_MASK;
printk("scsi%d: int_data_bad_phase, phase %s (%x)\n",
host->host_no, sbcl_to_phase(sbcl), sbcl);
break;
case A_int_bad_msg1:
case A_int_bad_msg2:
case A_int_bad_msg3:
case A_int_cmd_bad_phase:
case A_int_no_msgout1:
case A_int_no_msgout2:
case A_int_no_msgout3:
case A_int_not_cmd_complete:
case A_int_sel_no_ident:
case A_int_sel_not_cmd:
case A_int_status_not_msgin:
case A_int_resel_not_msgin:
case A_int_selected:
case A_int_not_rej:
default:
sbcl = NCR_read8(SBCL_REG) & SBCL_PHASE_MASK;
printk("scsi%d: Unimplemented script interrupt: %08x, phase %s\n",
host->host_no, dsps, sbcl_to_phase(sbcl));
sim710_errors++;
/* resume_offset is zero, which will cause a host reset */
}
return resume_offset;
}
static void
run_command (struct sim710_hostdata *hostdata, Scsi_Cmnd *cmd)
{
struct Scsi_Host *host = cmd->host;
struct sim710_target *targdata = hostdata->target + cmd->target;
int i, datain, dataout, sg_start;
u32 *dip, *dop, dsa;
DEB(DEB_CMND, printk("scsi%d: id%d starting ", host->host_no,
cmd->target));
DEB(DEB_CMND, print_command(cmd->cmnd));
switch (cmd->cmnd[0]) {
case INQUIRY:
case MODE_SENSE:
case READ_6:
case READ_10:
case READ_CAPACITY:
case REQUEST_SENSE:
case READ_BLOCK_LIMITS:
case READ_TOC:
datain = 1;
dataout = 0;
break;
case MODE_SELECT:
case WRITE_6:
case WRITE_10:
datain = 0;
dataout = 1;
break;
case TEST_UNIT_READY:
case ALLOW_MEDIUM_REMOVAL:
case START_STOP:
datain = dataout = 0;
break;
default:
datain = dataout = 1;
}
memcpy(targdata->dsa_cdb, cmd->cmnd, MAX_CMND);
targdata->dsa_msgout[0] =
IDENTIFY((opt_nodisc[hostdata->chip] & (1<<cmd->target)) ? 0 : 1 ,0);
if (hostdata->negotiate & (1 << cmd->target)) {
if (opt_noneg[hostdata->chip] & (1 << cmd->target)) {
hostdata->negotiate ^= (1 << cmd->target);
targdata->dsa[DSA_MSGOUT] = 1;
}
else {
DEB(DEB_SYNC, printk("scsi%d: Negotiating async transfers "
"for ID %d\n",
host->host_no, cmd->target));
memcpy(targdata->dsa_msgout+1, async_message, sizeof(async_message));
targdata->dsa[DSA_MSGOUT] = sizeof(async_message) + 1;
}
}
else
targdata->dsa[DSA_MSGOUT] = 1;
targdata->dsa_msgin[0] = 0xff;
targdata->dsa_status[0] = 0xff;
targdata->dsa[DSA_SELECT] = (1 << cmd->target) << 16;
targdata->dsa[DSA_MSGOUT+1] = virt_to_bus(targdata->dsa_msgout);
targdata->dsa[DSA_CMND] = cmd->cmd_len;
targdata->dsa[DSA_CMND+1] = virt_to_bus(targdata->dsa_cdb);
targdata->dsa[DSA_STATUS] = 1;
targdata->dsa[DSA_STATUS+1] = virt_to_bus(targdata->dsa_status);
targdata->dsa[DSA_MSGIN] = 1;
targdata->dsa[DSA_MSGIN+1] = virt_to_bus(targdata->dsa_msgin);
sg_start = (MAX_SG - (cmd->use_sg ? cmd->use_sg : 1)) * 2;
dip = targdata->dsa + DSA_DATAIN + sg_start;
dop = targdata->dsa + DSA_DATAOUT + sg_start;
for (i = 0; cmd->use_sg ? (i < cmd->use_sg) : !i; i++) {
u32 vbuf = cmd->use_sg ?
(u32)(((struct scatterlist *)cmd->buffer)[i].address) :
(u32)(cmd->request_buffer);
u32 bbuf = virt_to_bus((void *)vbuf);
u32 cnt = cmd->use_sg ?
((struct scatterlist *)cmd->buffer)[i].length :
cmd->request_bufflen;
if (datain) {
*dip++ = cnt;
*dip++ = bbuf;
}
if (dataout) {
*dop++ = cnt;
*dop++ = bbuf;
}
}
targdata->data_out_jump = hostdata->script[Ent_patch_output_data/4+1] =
virt_to_bus(hostdata->script + Ent_patch_output_data/4 + sg_start + 2);
targdata->data_in_jump = hostdata->script[Ent_patch_input_data/4+1] =
virt_to_bus(hostdata->script + Ent_patch_input_data/4 + sg_start + 2);
for (i = 0, dsa = virt_to_bus(targdata->dsa); i < 4; i++) {
u32 v = hostdata->script[Ent_patch_new_dsa/4 + i * 2];
v &= ~0x0000ff00;
v |= (dsa & 0xff) << 8;
hostdata->script[Ent_patch_new_dsa/4 + i * 2] = v;
dsa >>= 8;
}
hostdata->running = targdata->cur_cmd = cmd;
hostdata->state = STATE_BUSY;
NCR_write8(ISTAT_REG, ISTAT_10_SIGP);
}
static volatile int process_issue_queue_running = 0;
static __inline__ void
run_process_issue_queue(struct sim710_hostdata *hostdata)
{
unsigned long flags;
save_flags (flags);
cli();
if (!process_issue_queue_running) {
process_issue_queue_running = 1;
process_issue_queue(hostdata, flags);
/*
* process_issue_queue_running is cleared in process_issue_queue
* once it can't do more work, and process_issue_queue exits with
* interrupts disabled.
*/
}
restore_flags (flags);
}
/*
* Function : process_issue_queue (hostdata, flags)
*
* Purpose : Start next command for any idle target.
*
* NOTE : process_issue_queue exits with interrupts *disabled*, so the
* caller must reenable them if it desires.
*
* NOTE : process_issue_queue should be called from both
* sim710_queue_command() and from the interrupt handler
* after command completion.
*/
static void
process_issue_queue (struct sim710_hostdata *hostdata, unsigned long flags)
{
Scsi_Cmnd *tmp, *prev;
int done;
/*
* We run (with interrupts disabled) until we're sure that none of
* the host adapters have anything that can be done, at which point
* we set process_issue_queue_running to 0 and exit.
*
* Interrupts are enabled before doing various other internal
* instructions, after we've decided that we need to run through
* the loop again.
*
*/
do {
cli(); /* Freeze request queues */
done = 1;
if (hostdata->issue_queue) {
if (hostdata->state == STATE_DISABLED) {
tmp = (Scsi_Cmnd *) hostdata->issue_queue;
hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr;
tmp->result = (DID_BAD_TARGET << 16);
tmp->scsi_done (tmp);
done = 0;
}
else if (hostdata->state == STATE_IDLE) {
for (tmp = hostdata->issue_queue, prev = NULL; tmp;
prev = tmp, tmp = (Scsi_Cmnd *) tmp->SCp.ptr) {
if (hostdata->target[tmp->target].cur_cmd == NULL) {
if (prev)
prev->SCp.ptr = tmp->SCp.ptr;
else
hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr;
tmp->SCp.ptr = NULL;
run_command (hostdata, tmp);
done = 0;
} /* if target/lun is not busy */
} /* scan issue queue for work */
} /* host is idle */
} /* if hostdata->issue_queue */
if (!done)
restore_flags (flags);
} while (!done);
process_issue_queue_running = 0;
}
/* A quick wrapper for sim710_intr_handle to grab the spin lock */
static void
do_sim710_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned long flags;
spin_lock_irqsave(&io_request_lock, flags);
sim710_intr_handle(irq, dev_id, regs);
spin_unlock_irqrestore(&io_request_lock, flags);
}
/* A "high" level interrupt handler */
static void
sim710_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
{
struct Scsi_Host * host = (struct Scsi_Host *)dev_id;
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)host->hostdata[0];
Scsi_Cmnd * cmd;
unsigned char istat, dstat;
unsigned char sstat0;
u32 scratch, dsps, resume_offset = 0;
istat = NCR_read8(ISTAT_REG);
if (!(istat & (ISTAT_SIP|ISTAT_DIP)))
return;
else {
sim710_intrs++;
dsps = NCR_read32(DSPS_REG);
hostdata->state = STATE_HALTED;
sstat0 = dstat = 0;
scratch = NCR_read32(SCRATCH_REG);
if (istat & ISTAT_SIP) {
sstat0 = NCR_read8(SSTAT0_REG);
}
if (istat & ISTAT_DIP) {
udelay(10); /* Some comment somewhere about 10cycles
* between accesses to sstat0 and dstat ??? */
dstat = NCR_read8(DSTAT_REG);
}
DEB(DEB_INTS, printk("scsi%d: Int %d, istat %02x, sstat0 %02x "
"dstat %02x, dsp [%04x], scratch %02x\n",
host->host_no, sim710_intrs, istat, sstat0, dstat,
(u32 *)(bus_to_virt(NCR_read32(DSP_REG))) - hostdata->script,
scratch));
if (scratch & 0x100) {
u8 *p = hostdata->msgin_buf;
DEB(DEB_INTS, printk(" msgin_buf: %02x %02x %02x %02x\n",
p[0], p[1], p[2], p[3]));
}
if ((dstat & DSTAT_SIR) && dsps == A_int_reselected) {
/* Reselected. Identify the target from LCRC_REG, and
* update current command. If we were trying to select
* a device, then that command needs to go back on the
* issue_queue for later.
*/
unsigned char lcrc = NCR_read8(LCRC_REG_10);
int id = 0;
if (!(lcrc & 0x7f)) {
printk("scsi%d: Reselected with LCRC = %02x\n",
host->host_no, lcrc);
cmd = NULL;
}
else {
while (!(lcrc & 1)) {
id++;
lcrc >>= 1;
}
DEB(DEB_DISC, printk("scsi%d: Reselected by ID %d\n",
host->host_no, id));
if (hostdata->running) {
/* Clear SIGP */
(void)NCR_read8(CTEST2_REG_700);
DEB(DEB_DISC, printk("scsi%d: Select of %d interrupted "
"by reselect from %d (%p)\n",
host->host_no, hostdata->running->target,
id, hostdata->target[id].cur_cmd));
cmd = hostdata->running;
hostdata->target[cmd->target].cur_cmd = NULL;
cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue;
hostdata->issue_queue = cmd;
}
cmd = hostdata->running = hostdata->target[id].cur_cmd;
}
}
else
cmd = hostdata->running;
if (!cmd) {
printk("scsi%d: No active command!\n", host->host_no);
printk("scsi%d: Int %d, istat %02x, sstat0 %02x "
"dstat %02x, dsp [%04x], scratch %02x, dsps %08x\n",
host->host_no, sim710_intrs, istat, sstat0, dstat,
(u32 *)(bus_to_virt(NCR_read32(DSP_REG))) - hostdata->script,
NCR_read32(SCRATCH_REG), dsps);
/* resume_offset is zero, which will cause a host reset */
}
else if (sstat0 & SSTAT0_700_STO) {
DEB(DEB_TOUT, printk("scsi%d: Selection timeout\n", host->host_no));
cmd->result = DID_NO_CONNECT << 16;
SCSI_DONE(cmd);
hostdata->target[cmd->target].cur_cmd = NULL;
resume_offset = Ent_reselect;
}
else if (sstat0 & (SSTAT0_SGE|SSTAT0_UDC|SSTAT0_RST|SSTAT0_PAR)) {
printk("scsi%d: Serious error, sstat0 = %02x\n", host->host_no,
sstat0);
sim710_errors++;
/* resume_offset is zero, which will cause a host reset */
}
else if (dstat & (DSTAT_BF|DSTAT_ABRT|DSTAT_SSI|DSTAT_WTD)) {
printk("scsi%d: Serious error, dstat = %02x\n", host->host_no,
dstat);
sim710_errors++;
/* resume_offset is zero, which will cause a host reset */
}
else if (dstat & DSTAT_SIR)
resume_offset = handle_script_int(host, cmd);
else if (sstat0 & SSTAT0_MA)
resume_offset = handle_phase_mismatch(host, cmd);
else if (dstat & DSTAT_IID) {
/* This can be due to a quick reselect while doing a WAIT
* DISCONNECT.
*/
resume_offset = handle_idd(host, cmd);
}
else {
sim710_errors++;
printk("scsi%d: Spurious interrupt!\n", host->host_no);
/* resume_offset is zero, which will cause a host reset */
}
}
if (resume_offset) {
if (resume_offset == Ent_reselect) {
hostdata->running = NULL;
hostdata->state = STATE_IDLE;
}
else
hostdata->state = STATE_BUSY;
DEB(DEB_RESUME, printk("scsi%d: Resuming at script[0x%x]\n",
host->host_no, resume_offset/4));
#ifdef DEBUG_LIMIT_INTS
if (sim710_intrs < DEBUG_LIMIT_INTS)
#endif
{
NCR_write32(SCRATCH_REG, 0);
NCR_write32(DSP_REG, virt_to_bus(hostdata->script+resume_offset/4));
}
if (resume_offset == Ent_reselect)
run_process_issue_queue(hostdata);
}
else {
printk("scsi%d: Failed to handle interrupt. Failing commands "
"and resetting SCSI bus and chip\n", host->host_no);
mdelay(1000); /* Give chance to read screen!! */
full_reset(host);
}
}
int
sim710_queuecommand(Scsi_Cmnd * cmd, void (*done)(Scsi_Cmnd *))
{
struct Scsi_Host *host = cmd->host;
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)host->hostdata[0];
Scsi_Cmnd *tmp;
unsigned long flags;
if (cmd->lun) {
/* Silently ignore luns other than zero! */
cmd->result = (DID_BAD_TARGET << 16);
done(cmd);
return 0;
}
DEB(DEB_CMND, printk("scsi%d: id%d queuing ", host->host_no,
cmd->target));
DEB(DEB_CMND, print_command(cmd->cmnd));
cmd->scsi_done = done;
cmd->host_scribble = NULL;
cmd->SCp.ptr = NULL;
cmd->SCp.buffer = NULL;
save_flags(flags);
cli();
if (ignore_ids[hostdata->chip] & (1 << cmd->target)) {
printk("scsi%d: ignoring target %d\n", host->host_no, cmd->target);
cmd->result = (DID_BAD_TARGET << 16);
done(cmd);
restore_flags (flags);
return 0;
}
#ifdef DEBUG_LIMIT_INTS
if (sim710_intrs > DEBUG_LIMIT_INTS) {
cmd->result = (DID_BAD_TARGET << 16);
done(cmd);
restore_flags (flags);
return 0;
}
#endif
if (cmd->use_sg > MAX_SG)
panic ("cmd->use_sg = %d\n", cmd->use_sg);
if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue;
hostdata->issue_queue = cmd;
} else {
for (tmp = hostdata->issue_queue; tmp->SCp.ptr;
tmp = (Scsi_Cmnd *) tmp->SCp.ptr);
tmp->SCp.ptr = (unsigned char *) cmd;
}
restore_flags (flags);
run_process_issue_queue(hostdata);
return 0;
}
__init int
sim710_detect(Scsi_Host_Template * tpnt)
{
unsigned char scsi_id;
unsigned int base_addr;
struct Scsi_Host * host = NULL;
struct sim710_hostdata *hostdata;
unsigned long timeout;
unsigned long irq_mask;
int requested_irq;
int probed_irq;
u32 dsps;
int chips = 0;
int limit;
int indx;
int revision;
int size;
volatile u8 tmp;
struct Scsi_Host *our_hosts[MAXBOARDS+1];
#ifdef MODULE
if (sim710)
param_setup(sim710);
#endif
if (no_of_boards < 0) {
printk("sim710: NCR53C710 driver disabled\n");
return 0;
}
#ifdef CONFIG_MCA
/* If board details have been specified via boot/module parameters,
* then don't bother probing.
*/
if (no_of_boards == 0) {
int slot;
int pos[3];
int mca_53c710_ids[] = MCA_53C710_IDS;
int *id_to_check = mca_53c710_ids;
static int io_004f_by_pos[] = MCA_004F_IO_PORTS;
static int irq_004f_by_pos[] = MCA_004F_IRQS;
static int io_01bb_by_pos[] = MCA_01BB_IO_PORTS;
static int irq_01bb_by_pos[] = MCA_01BB_IRQS;
while ( *id_to_check && no_of_boards < MAXBOARDS) {
if (!MCA_bus)
return 0;
if ((slot = mca_find_adapter(*id_to_check, 0)) != MCA_NOTFOUND) {
pos[0] = mca_read_stored_pos(slot, 2);
pos[1] = mca_read_stored_pos(slot, 3);
pos[2] = mca_read_stored_pos(slot, 4);
/*
* 01BB & 01BA port base by bits 7,6,5,4,3,2 in pos[2]
*
* 000000 <disabled> 001010 0x2800
* 000001 <invalid> 001011 0x2C00
* 000010 0x0800 001100 0x3000
* 000011 0x0C00 001101 0x3400
* 000100 0x1000 001110 0x3800
* 000101 0x1400 001111 0x3C00
* 000110 0x1800 010000 0x4000
* 000111 0x1C00 010001 0x4400
* 001000 0x2000 010010 0x4800
* 001001 0x2400 010011 0x4C00
* 010100 0x5000
*
* 00F4 port base by bits 3,2,1 in pos[0]
*
* 000 <disabled> 001 0x200
* 010 0x300 011 0x400
* 100 0x500 101 0x600
*
* 01BB & 01BA IRQ is specified in pos[0] bits 7 and 6:
*
* 00 3 10 11
* 01 5 11 14
*
* 00F4 IRQ specified by bits 6,5,4 in pos[0]
*
* 100 5 101 9
* 110 14
*/
if ( *id_to_check == 0x01bb || *id_to_check == 0x01ba ) {
bases[no_of_boards] = io_01bb_by_pos[(pos[2] & 0xFC) >> 2];
irq_vectors[no_of_boards] =
irq_01bb_by_pos[((pos[0] & 0xC0) >> 6)];
if (bases[no_of_boards] == 0x0000)
printk("sim710: NCR53C710 Adapter ID 0x01bb is disabled.\n");
else {
no_of_boards++;
if ( *id_to_check == 0x01bb )
mca_set_adapter_name( slot,
"NCR 3360/3430 SCSI SubSystem" );
else
mca_set_adapter_name(slot,
"NCR Dual SIOP SCSI Host Adapter Board");
}
}
else if ( *id_to_check == 0x004f ) {
bases[no_of_boards] = io_004f_by_pos[((pos[0] & 0x0E) >> 1)];
irq_vectors[no_of_boards] =
irq_004f_by_pos[((pos[0] & 0x70) >> 4) - 4];
if (bases[no_of_boards] == 0x0000)
printk("sim710: NCR53C710 Adapter ID 0x004f is disabled.\n");
else {
no_of_boards++;
mca_set_adapter_name(slot,
"NCR 53c710 SCSI Host Adapter Board");
}
}
}
id_to_check++;
}
}
#endif
#ifdef CONFIG_EISA
/* Auto probe, if no boards specified in boot parameters */
if (no_of_boards == 0) {
int io_addr;
/* reverse probe, so my on-board controller at 0x9000 is always scsi0 */
for (io_addr = 0x9000; no_of_boards < MAXBOARDS && io_addr >= 0x1000; io_addr -= 0x1000) {
if (request_region(io_addr, 0x40, "sim710") != NULL) {
int id0 = inw(io_addr + 0xc80);
int id1 = inw(io_addr + 0xc82);
/* The on-board controller on my Proliant 2000 is 0x1044,
* my EISA card is 0x1144.
*/
if (id0 == 0x110e && (id1 == 0x1044 || id1 == 0x1144)) {
bases[no_of_boards] = io_addr;
#if 0
/* This should detect the IRQ, but I havn't proved it for
* myself. Leave the old probe code active for now, as
* no-one has reported problems with it.
*/
switch (inb(io_addr + 0xc88)) {
case (0x00):
irq_vectors[no_of_boards] = 11;
break;
case (0x01):
irq_vectors[no_of_boards] = 14;
break;
case (0x02):
irq_vectors[no_of_boards] = 15;
break;
case (0x03):
irq_vectors[no_of_boards] = 10;
break;
case (0x04):
irq_vectors[no_of_boards] = 9;
break;
default:
printk("sim710.c: irq nasty\n");
}
#endif
no_of_boards++;
}
release_region(io_addr, 64);
}
}
}
#endif
if (!no_of_boards) {
printk("sim710: No NCR53C710 adapter found.\n");
return 0;
}
size = sizeof(struct sim710_hostdata);
hostdata_order = 0;
while (size > (PAGE_SIZE << hostdata_order))
hostdata_order++;
size = PAGE_SIZE << hostdata_order;
DEB(DEB_ANY, printk("sim710: hostdata %d bytes, size %d, order %d\n",
sizeof(struct sim710_hostdata), size, hostdata_order));
tpnt->proc_name = "sim710";
memset(our_hosts, 0, sizeof(our_hosts));
for (indx = 0; indx < no_of_boards; indx++) {
unsigned long page = __get_free_pages(GFP_ATOMIC, hostdata_order);
if(page == 0UL)
{
printk(KERN_WARNING "sim710: out of memory registering board %d.\n", indx);
break;
}
host = scsi_register(tpnt, 4);
if(host == NULL) {
free_pages(host->hostdata[0], hostdata_order);
break;
}
our_hosts[chips] = host;
host->hostdata[0] = page;
hostdata = (struct sim710_hostdata *)host->hostdata[0];
memset(hostdata, 0, size);
scsi_id = 7;
base_addr = bases[indx];
requested_irq = irq_vectors[indx];
printk("scsi%d: Configuring Sim710 (SCSI-ID %d) at %x, IRQ %d\n",
host->host_no, scsi_id, base_addr, requested_irq);
DEB(DEB_ANY, printk("sim710: hostdata = %p (%d bytes), dsa0 = %p\n",
hostdata, sizeof(struct sim710_hostdata),
hostdata->target[0].dsa));
hostdata->chip = indx;
host->irq = requested_irq;
host->this_id = scsi_id;
host->unique_id = base_addr;
host->base = base_addr;
hostdata->msg_reject = MESSAGE_REJECT;
if (ncr_halt(host)) {
free_pages(host->hostdata[0], hostdata_order);
scsi_unregister (host);
printk("scsi%d: Failed to initialise 53c710 at address %x\n",
host->host_no, base_addr);
continue;
}
DEB(DEB_ANY,ncr_dump(host));
revision = (NCR_read8(CTEST8_REG) & 0xF0) >> 4;
printk("scsi%d: Revision 0x%x\n",host->host_no,revision);
sim710_soft_reset(host);
sim710_driver_init(host);
request_region((u32)host->base, 64, "sim710");
/* Now run test1 */
hostdata->test1_src = 0x53c710aa;
hostdata->test1_dst = 0x76543210;
NCR_write32(DSPS_REG, 0x89abcdef);
irq_mask = probe_irq_on();
NCR_write32(DSP_REG, virt_to_bus(hostdata->script+Ent_test1/4));
timeout = 5;
while (hostdata->test1_dst != hostdata->test1_src && timeout--)
mdelay(100);
tmp = NCR_read8(ISTAT_REG);
tmp = NCR_read8(SSTAT0_REG);
udelay(10);
tmp = NCR_read8(DSTAT_REG);
probed_irq = probe_irq_off(irq_mask);
if (requested_irq == 0) {
if (probed_irq > 0) {
printk("scsi%d: Chip is using IRQ %d\n", host->host_no,
probed_irq);
requested_irq = host->irq = probed_irq;
}
else {
printk("scsi%d: Failed to probe for IRQ (returned %d)\n",
host->host_no, probed_irq);
ncr_halt(host);
free_pages(host->hostdata[0], hostdata_order);
scsi_unregister (host);
release_region((u32)host->base, 64);
continue;
}
}
else if (probed_irq > 0 && probed_irq != requested_irq)
printk("scsi%d: WARNING requested IRQ %d, but probed as %d\n",
host->host_no, requested_irq, probed_irq);
else if (probed_irq <= 0)
printk("scsi%d: WARNING IRQ probe failed, (returned %d)\n",
host->host_no, probed_irq);
dsps = NCR_read32(DSPS_REG);
if (hostdata->test1_dst != 0x53c710aa || dsps != A_int_test1) {
if (hostdata->test1_dst != 0x53c710aa)
printk("scsi%d: test 1 FAILED: data: exp 0x53c710aa, got 0x%08x\n",
host->host_no, hostdata->test1_dst);
if (dsps != A_int_test1)
printk("scsi%d: test 1 FAILED: dsps: exp 0x%08x, got 0x%08x\n",
host->host_no, A_int_test1, dsps);
ncr_dump(host);
ncr_halt(host);
free_pages(host->hostdata[0], hostdata_order);
scsi_unregister (host);
release_region((u32)host->base, 64);
continue;
}
printk("scsi%d: test 1 completed ok.\n", host->host_no);
NCR_write32(DSP_REG, virt_to_bus(hostdata->script+Ent_reselect/4));
hostdata->state = STATE_IDLE;
chips++;
}
/* OK, now run down our_hosts[] calling request_irq(... SA_SHIRQ ...).
* Couldn't call request_irq earlier, as probing would have failed.
*/
for (indx = 0, limit = chips; indx < limit; indx++) {
host = our_hosts[indx];
if (request_irq(host->irq, do_sim710_intr_handle,
SA_INTERRUPT | SA_SHIRQ, "sim710", host))
{
printk("scsi%d : IRQ%d not free, detaching\n",
host->host_no, host->irq);
ncr_halt(host);
free_pages(host->hostdata[0], hostdata_order);
scsi_unregister (host);
chips--;
}
}
return chips;
}
int
sim710_abort(Scsi_Cmnd * cmd)
{
struct Scsi_Host * host = cmd->host;
printk("scsi%d: Unable to abort command for target %d\n",
host->host_no, cmd->target);
return FAILED;
}
/*
* This is a device reset. Need to select and send a Bus Device Reset msg.
*/
int
sim710_dev_reset(Scsi_Cmnd * SCpnt)
{
struct Scsi_Host * host = SCpnt->host;
printk("scsi%d: Unable to send Bus Device Reset for target %d\n",
host->host_no, SCpnt->target);
return FAILED;
}
/*
* This is bus reset. We need to reset the bus and fail any active commands.
*/
int
sim710_bus_reset(Scsi_Cmnd * SCpnt)
{
struct Scsi_Host * host = SCpnt->host;
printk("scsi%d: Unable to do SCSI bus reset\n", host->host_no);
return FAILED;
}
static int
full_reset(struct Scsi_Host * host)
{
struct sim710_hostdata *hostdata = (struct sim710_hostdata *)
host->hostdata[0];
int target;
Scsi_Cmnd *cmd;
u32 istat, dstat = 0, sstat0 = 0, sstat1 = 0, dsp, dsps, scratch;
unsigned long flags;
save_flags(flags);
cli();
istat = NCR_read8(ISTAT_REG);
if (istat & ISTAT_SIP) {
sstat0 = NCR_read8(SSTAT0_REG);
sstat1 = NCR_read8(SSTAT1_REG);
udelay(10);
}
if (istat & ISTAT_DIP)
dstat = NCR_read8(DSTAT_REG);
if (ncr_halt(host)) {
restore_flags(flags);
return FAILED;
}
restore_flags(flags);
dsp = NCR_read32(DSP_REG);
dsps = NCR_read32(DSPS_REG);
scratch = NCR_read32(SCRATCH_REG);
printk("scsi%d: istat = %02x, sstat0 = %02x, sstat1 = %02x, dstat = %02x\n",
host->host_no, istat, sstat0, sstat1, dstat);
printk("scsi%d: dsp = %08x (script[0x%04x]), dsps = %08x, scratch = %08x\n",
host->host_no, dsp,
((u32)bus_to_virt(dsp) - (u32)hostdata->script)/4, dsps, scratch);
for (target = 0; target < 7; target++) {
if ((cmd = hostdata->target[target].cur_cmd)) {
printk("scsi%d: Failing command for ID%d\n",
host->host_no, target);
cmd->result = DID_RESET << 16;
cmd->scsi_done(cmd);
hostdata->target[target].cur_cmd = NULL;
}
}
sim710_soft_reset(host);
sim710_driver_init(host);
NCR_write32(DSP_REG, virt_to_bus(hostdata->script+Ent_reselect/4));
hostdata->state = STATE_IDLE;
run_process_issue_queue(hostdata);
return SUCCESS;
}
/*
* This is host reset. We need to reset the chip and the bus.
*/
int
sim710_host_reset(Scsi_Cmnd * SCpnt)
{
struct Scsi_Host * host = SCpnt->host;
printk("scsi%d: >>>>>>>>>>>> Host reset <<<<<<<<<<<<\n", host->host_no);
return full_reset(host);
}
#ifdef MODULE
int
sim710_release(struct Scsi_Host *host)
{
ncr_halt(host);
free_pages(host->hostdata[0], hostdata_order);
free_irq(host->irq, host);
release_region((u32)host->base, 64);
return 1;
}
#endif
static Scsi_Host_Template driver_template = SIM710_SCSI;
#include "scsi_module.c"