Skip to content

L
linux
Commit 0e1cb392 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Linus Torvalds
Browse files
Options

[PATCH] Sun-3 VME support 

Add Sun-3 VME support (by Sam Creasey):
  - Added VME version of the Sun-3 NCR5380 scsi driver.
  - Modified the Sun-3 dvma routines to support VME.
  - Added sun3_map_test() -- uses the ex_table to trap faults on VME mappings
    in order to determine if a card is present.  This seems a little hackish to
    be, but:
      1) All changes are entirely within Sun3-only code paths,
      2) netbsd, sunos, and mach all use this mechanism for VME probes anyway.
parent 9d0f75b8
Show whitespace changes
Inline Side-by-side
Showing with 729 additions and 57 deletions
arch/m68k/Kconfig
View file @ 0e1cb392
......@@ -1125,8 +1125,8 @@ config SUN3_SCSI
depends on SUN3 && SCSI
help
This option will enable support for the OBIO (onboard io) NCR5380
SCSI controller found in the Sun 3/50 and 3/60. Note that this
driver does not provide support for VME SCSI boards.
SCSI controller found in the Sun 3/50 and 3/60, as well as for
"Sun3" type VME scsi controllers also based on the NCR5380.
General Linux information on the Sun 3 series (now discontinued)
is at <http://www.angelfire.com/ca2/tech68k/sun3.html>.
......
arch/m68k/mm/sun3kmap.c
View file @ 0e1cb392
......@@ -117,3 +117,40 @@ void iounmap(void *addr)
{
vfree((void *)(PAGE_MASK & (unsigned long)addr));
}
/* sun3_map_test(addr, val) -- Reads a byte from addr, storing to val,
* trapping the potential read fault. Returns 0 if the access faulted,
* 1 on success.
*
* This function is primarily used to check addresses on the VME bus.
*
* Mucking with the page fault handler seems a little hackish to me, but
* SunOS, NetBSD, and Mach all implemented this check in such a manner,
* so I figure we're allowed.
*/
int sun3_map_test(unsigned long addr, char *val)
{
int ret = 0;
__asm__ __volatile__
(".globl _sun3_map_test_start\n"
"_sun3_map_test_start:\n"
"1: moveb (%2), (%0)\n"
" moveq #1, %1\n"
"2:\n"
".section .fixup,\"ax\"\n"
".even\n"
"3: moveq #0, %1\n"
" jmp 2b\n"
".previous\n"
".section __ex_table,\"a\"\n"
".align 4\n"
".long 1b,3b\n"
".previous\n"
".globl _sun3_map_test_end\n"
"_sun3_map_test_end:\n"
: "=a"(val), "=r"(ret)
: "a"(addr));
return ret;
}
arch/m68k/sun3/sun3dvma.c
View file @ 0e1cb392
......@@ -240,8 +240,14 @@ inline unsigned long dvma_map_align(unsigned long kaddr, int len, int align)
void dvma_unmap(void *baddr)
{
unsigned long addr;
free_baddr((unsigned long)baddr);
addr = (unsigned long)baddr;
/* check if this is a vme mapping */
if(!(addr & 0x00f00000))
addr |= 0xf00000;
free_baddr(addr);
return;
......
drivers/scsi/Makefile
View file @ 0e1cb392
......@@ -42,7 +42,7 @@ obj-$(CONFIG_OKTAGON_SCSI) += NCR53C9x.o oktagon_esp.o oktagon_io.o
obj-$(CONFIG_ATARI_SCSI) += atari_scsi.o
obj-$(CONFIG_MAC_SCSI) += mac_scsi.o
obj-$(CONFIG_SCSI_MAC_ESP) += mac_esp.o NCR53C9x.o
obj-$(CONFIG_SUN3_SCSI) += sun3_scsi.o
obj-$(CONFIG_SUN3_SCSI) += sun3_scsi.o sun3_scsi_vme.o
obj-$(CONFIG_MVME16x_SCSI) += mvme16x.o 53c7xx.o
obj-$(CONFIG_BVME6000_SCSI) += bvme6000.o 53c7xx.o
obj-$(CONFIG_SCSI_SIM710) += sim710.o
......
drivers/scsi/sun3_NCR5380.c
View file @ 0e1cb392
......@@ -617,11 +617,11 @@ static void NCR5380_print_phase(struct Scsi_Host *instance)
status = NCR5380_read(STATUS_REG);
if (!(status & SR_REQ))
printk(KERN_DEBUG "scsi%d: REQ not asserted, phase unknown.\n", HOSTNO);
printk("scsi%d: REQ not asserted, phase unknown.\n", HOSTNO);
else {
for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
(phases[i].value != (status & PHASE_MASK)); ++i);
printk(KERN_DEBUG "scsi%d: phase %s\n", HOSTNO, phases[i].name);
printk("scsi%d: phase %s\n", HOSTNO, phases[i].name);
}
}
......@@ -755,10 +755,7 @@ static void NCR5380_print_status (struct Scsi_Host *instance)
static
char *lprint_Scsi_Cmnd (Scsi_Cmnd *cmd, char *pos, char *buffer, int length);
#ifndef NCR5380_proc_info
static
#endif
int NCR5380_proc_info (char *buffer, char **start, off_t offset,
static int NCR5380_proc_info (char *buffer, char **start, off_t offset,
int length, int hostno, int inout)
{
char *pos = buffer;
......@@ -914,10 +911,7 @@ static void __init NCR5380_init (struct Scsi_Host *instance, int flags)
*/
/* Only make static if a wrapper function is used */
#ifndef NCR5380_queue_command
static
#endif
int NCR5380_queue_command (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
static int NCR5380_queue_command (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
{
SETUP_HOSTDATA(cmd->host);
Scsi_Cmnd *tmp;
......@@ -1319,11 +1313,14 @@ static void NCR5380_intr (int irq, void *dev_id, struct pt_regs *regs)
{
/* MS: Ignore unknown phase mismatch interrupts (caused by EOP interrupt) */
if (basr & BASR_PHASE_MATCH)
printk(KERN_NOTICE "scsi%d: unknown interrupt, "
INT_PRINTK("scsi%d: unknown interrupt, "
"BASR 0x%x, MR 0x%x, SR 0x%x\n",
HOSTNO, basr, NCR5380_read(MODE_REG),
NCR5380_read(STATUS_REG));
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
}
} /* if !(SELECTION || PARITY) */
} /* BASR & IRQ */
......@@ -1333,6 +1330,9 @@ static void NCR5380_intr (int irq, void *dev_id, struct pt_regs *regs)
"BASR 0x%X, MR 0x%X, SR 0x%x\n", HOSTNO, basr,
NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG));
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
}
if (!done) {
......@@ -1695,7 +1695,9 @@ static int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag)
#ifndef SUPPORT_TAGS
hostdata->busy[cmd->target] |= (1 << cmd->lun);
#endif
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
#endif
initialize_SCp(cmd);
......@@ -1922,19 +1924,18 @@ static int NCR5380_transfer_dma( struct Scsi_Host *instance,
printk("scsi%d: transfer_dma without setup!\n", HOSTNO);
BUG();
}
hostdata->dma_len = c;
DMA_PRINTK("scsi%d: initializing DMA for %s, %d bytes %s %p\n",
HOSTNO, (p & SR_IO) ? "reading" : "writing",
c, (p & SR_IO) ? "to" : "from", d);
c, (p & SR_IO) ? "to" : "from", *data);
/* netbsd turns off ints here, why not be safe and do it too */
save_flags(flags);
cli();
/* send start chain */
sun3_udc_write(UDC_CHN_START, UDC_CSR);
sun3scsi_dma_start(c, *data);
if (p & SR_IO) {
NCR5380_write(TARGET_COMMAND_REG, 1);
......@@ -1950,6 +1951,10 @@ static int NCR5380_transfer_dma( struct Scsi_Host *instance,
NCR5380_write(START_DMA_SEND_REG, 0);
}
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
restore_flags(flags);
sun3_dma_active = 1;
......@@ -1988,6 +1993,10 @@ static void NCR5380_information_transfer (struct Scsi_Host *instance)
unsigned char phase, tmp, extended_msg[10], old_phase=0xff;
Scsi_Cmnd *cmd = (Scsi_Cmnd *) hostdata->connected;
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
#endif
while (1) {
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
......@@ -2020,6 +2029,9 @@ static void NCR5380_information_transfer (struct Scsi_Host *instance)
sun3_dma_setup_done = cmd;
}
}
#endif
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
#endif
}
......@@ -2342,6 +2354,9 @@ static void NCR5380_information_transfer (struct Scsi_Host *instance)
/* Wait for bus free to avoid nasty timeouts */
while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
barrier();
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
return;
/*
* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
......@@ -2677,10 +2692,7 @@ static void NCR5380_reselect (struct Scsi_Host *instance)
* called where the loop started in NCR5380_main().
*/
#ifndef NCR5380_abort
static
#endif
int NCR5380_abort (Scsi_Cmnd *cmd)
static int NCR5380_abort (Scsi_Cmnd *cmd)
{
struct Scsi_Host *instance = cmd->host;
SETUP_HOSTDATA(instance);
......@@ -2874,7 +2886,7 @@ int NCR5380_abort (Scsi_Cmnd *cmd)
*
*/
int NCR5380_reset( Scsi_Cmnd *cmd, unsigned int reset_flags)
static int NCR5380_reset( Scsi_Cmnd *cmd, unsigned int reset_flags)
{
SETUP_HOSTDATA(cmd->host);
int i;
......
drivers/scsi/sun3_scsi.c
View file @ 0e1cb392
......@@ -525,6 +525,14 @@ static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted, Scsi_Cmn
return 0;
}
static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)
{
sun3_udc_write(UDC_CHN_START, UDC_CSR);
return 0;
}
/* clean up after our dma is done */
static int sun3scsi_dma_finish(int write_flag)
{
......
drivers/scsi/sun3_scsi.h
View file @ 0e1cb392
......@@ -36,6 +36,11 @@
#ifndef SUN3_NCR5380_H
#define SUN3_NCR5380_H
#ifndef NULL
#define NULL 0
#endif
#define SUN3SCSI_PUBLIC_RELEASE 1
/*
......@@ -45,17 +50,19 @@
#define IRQ_SUN3_SCSI 2
#define IOBASE_SUN3_SCSI 0x00140000
int sun3scsi_abort (Scsi_Cmnd *);
int sun3scsi_detect (Scsi_Host_Template *);
int sun3scsi_release (struct Scsi_Host *);
const char *sun3scsi_info (struct Scsi_Host *);
int sun3scsi_reset(Scsi_Cmnd *, unsigned int);
int sun3scsi_queue_command (Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
int sun3scsi_proc_info (char *buffer, char **start, off_t offset,
int length, int hostno, int inout);
#define IOBASE_SUN3_VMESCSI 0xff200000
#ifndef NULL
#define NULL 0
static int sun3scsi_abort (Scsi_Cmnd *);
static int sun3scsi_detect (Scsi_Host_Template *);
static const char *sun3scsi_info (struct Scsi_Host *);
static int sun3scsi_reset(Scsi_Cmnd *, unsigned int);
static int sun3scsi_queue_command (Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
static int sun3scsi_proc_info (char *buffer, char **start, off_t offset,
int length, int hostno, int inout);
#ifdef MODULE
static int sun3scsi_release (struct Scsi_Host *);
#else
#define sun3scsi_release NULL
#endif
#ifndef CMD_PER_LUN
......@@ -70,26 +77,36 @@ int sun3scsi_proc_info (char *buffer, char **start, off_t offset,
#define SG_TABLESIZE SG_NONE
#endif
#ifndef MAX_TAGS
#define MAX_TAGS 32
#endif
#ifndef USE_TAGGED_QUEUING
#define USE_TAGGED_QUEUING 0
#define USE_TAGGED_QUEUING 1
#endif
#include <scsi/scsicam.h>
#ifdef SUN3_SCSI_VME
#define SUN3_SCSI_NAME "Sun3 NCR5380 VME SCSI"
#else
#define SUN3_SCSI_NAME "Sun3 NCR5380 SCSI"
#endif
#define SUN3_NCR5380 { \
name: "Sun3 NCR5380 SCSI", \
detect: sun3scsi_detect, \
release: sun3scsi_release, /* Release */ \
info: sun3scsi_info, \
queuecommand: sun3scsi_queue_command, \
abort: sun3scsi_abort, \
reset: sun3scsi_reset, \
can_queue: CAN_QUEUE, /* can queue */ \
this_id: 7, /* id */ \
sg_tablesize: SG_ALL, /* sg_tablesize */ \
cmd_per_lun: CMD_PER_LUN, /* cmd per lun */ \
unchecked_isa_dma: 0, /* unchecked_isa_dma */ \
use_clustering: DISABLE_CLUSTERING \
.name = SUN3_SCSI_NAME, \
.detect = sun3scsi_detect, \
.release = sun3scsi_release, /* Release */ \
.info = sun3scsi_info, \
.queuecommand = sun3scsi_queue_command, \
.abort = sun3scsi_abort, \
.reset = sun3scsi_reset, \
.can_queue = CAN_QUEUE, /* can queue */ \
.this_id = 7, /* id */ \
.sg_tablesize = SG_TABLESIZE, /* sg_tablesize */ \
.cmd_per_lun = CMD_PER_LUN, /* cmd per lun */ \
.unchecked_isa_dma = 0, /* unchecked_isa_dma */ \
.use_clustering = DISABLE_CLUSTERING \
}
#ifndef HOSTS_C
......@@ -124,13 +141,20 @@ use_clustering: DISABLE_CLUSTERING \
/* additional registers - mainly DMA control regs */
/* these start at regbase + 8 -- directly after the NCR regs */
struct sun3_dma_regs {
unsigned short vmeregs[4]; /* unimpl vme stuff */
unsigned short udc_data; /* udc dma data reg */
unsigned short udc_addr; /* uda dma addr reg */
unsigned short dma_addr_hi; /* vme only */
unsigned short dma_addr_lo; /* vme only */
unsigned short dma_count_hi; /* vme only */
unsigned short dma_count_lo; /* vme only */
unsigned short udc_data; /* udc dma data reg (obio only) */
unsigned short udc_addr; /* uda dma addr reg (obio only) */
unsigned short fifo_data; /* fifo data reg, holds extra byte on
odd dma reads */
unsigned short fifo_count;
unsigned short csr; /* control/status reg */
unsigned short bpack_hi; /* vme only */
unsigned short bpack_lo; /* vme only */
unsigned short ivect; /* vme only */
unsigned short fifo_count_hi; /* vme only */
};
/* ucd chip specific regs - live in dvma space */
......@@ -179,11 +203,21 @@ struct sun3_udc_regs {
#define CSR_SDB_INT 0x200 /* sbc interrupt pending */
#define CSR_DMA_INT 0x100 /* dma interrupt pending */
#define CSR_LEFT 0xc0
#define CSR_LEFT_3 0xc0
#define CSR_LEFT_2 0x80
#define CSR_LEFT_1 0x40
#define CSR_PACK_ENABLE 0x20
#define CSR_DMA_ENABLE 0x10
#define CSR_SEND 0x8 /* 1 = send 0 = recv */
#define CSR_FIFO 0x2 /* reset fifo */
#define CSR_INTR 0x4 /* interrupt enable */
#define CSR_SCSI 0x1
#define VME_DATA24 0x3d00
// debugging printk's, taken from atari_scsi.h
/* Debugging printk definitions:
*
......@@ -365,8 +399,6 @@ struct sun3_udc_regs {
#define NCR_PRINT_STATUS(mask) \
((NDEBUG & (mask)) ? NCR5380_print_status(instance) : (void)0)
#define NDEBUG_ANY 0xffffffff
#endif /* ndef HOSTS_C */
......
drivers/scsi/sun3_scsi_vme.c 0 → 100644
View file @ 0e1cb392
/*
* Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
*
* Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
*
* VME support added by Sam Creasey
*
* Adapted from sun3_scsi.c -- see there for other headers
*
* TODO: modify this driver to support multiple Sun3 SCSI VME boards
*
*/
#define AUTOSENSE
#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/blk.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/sun3ints.h>
#include <asm/dvma.h>
#include <asm/idprom.h>
#include <asm/machines.h>
#define SUN3_SCSI_VME
#undef SUN3_SCSI_DEBUG
/* dma on! */
#define REAL_DMA
#include "scsi.h"
#include "hosts.h"
#include "sun3_scsi.h"
#include "NCR5380.h"
extern int sun3_map_test(unsigned long, char *);
#define USE_WRAPPER
/*#define RESET_BOOT */
#define DRIVER_SETUP
#define NDEBUG 0
/*
* BUG can be used to trigger a strange code-size related hang on 2.1 kernels
*/
#ifdef BUG
#undef RESET_BOOT
#undef DRIVER_SETUP
#endif
/* #define SUPPORT_TAGS */
//#define ENABLE_IRQ() enable_irq( SUN3_VEC_VMESCSI0 );
#define ENABLE_IRQ()
static void scsi_sun3_intr(int irq, void *dummy, struct pt_regs *fp);
static inline unsigned char sun3scsi_read(int reg);
static inline void sun3scsi_write(int reg, int value);
static int setup_can_queue = -1;
MODULE_PARM(setup_can_queue, "i");
static int setup_cmd_per_lun = -1;
MODULE_PARM(setup_cmd_per_lun, "i");
static int setup_sg_tablesize = -1;
MODULE_PARM(setup_sg_tablesize, "i");
#ifdef SUPPORT_TAGS
static int setup_use_tagged_queuing = -1;
MODULE_PARM(setup_use_tagged_queuing, "i");
#endif
static int setup_hostid = -1;
MODULE_PARM(setup_hostid, "i");
static Scsi_Cmnd *sun3_dma_setup_done = NULL;
#define AFTER_RESET_DELAY (HZ/2)
/* ms to wait after hitting dma regs */
#define SUN3_DMA_DELAY 10
/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
#define SUN3_DVMA_BUFSIZE 0xe000
/* minimum number of bytes to do dma on */
#define SUN3_DMA_MINSIZE 128
static volatile unsigned char *sun3_scsi_regp;
static volatile struct sun3_dma_regs *dregs;
#ifdef OLDDMA
static unsigned char *dmabuf = NULL; /* dma memory buffer */
#endif
static unsigned char *sun3_dma_orig_addr = NULL;
static unsigned long sun3_dma_orig_count = 0;
static int sun3_dma_active = 0;
static unsigned long last_residual = 0;
/*
* NCR 5380 register access functions
*/
static inline unsigned char sun3scsi_read(int reg)
{
return( sun3_scsi_regp[reg] );
}
static inline void sun3scsi_write(int reg, int value)
{
sun3_scsi_regp[reg] = value;
}
/*
* XXX: status debug
*/
static struct Scsi_Host *default_instance;
/*
* Function : int sun3scsi_detect(Scsi_Host_Template * tpnt)
*
* Purpose : initializes mac NCR5380 driver based on the
* command line / compile time port and irq definitions.
*
* Inputs : tpnt - template for this SCSI adapter.
*
* Returns : 1 if a host adapter was found, 0 if not.
*
*/
static int sun3scsi_detect(Scsi_Host_Template * tpnt)
{
unsigned long ioaddr, irq;
static int called = 0;
struct Scsi_Host *instance;
int i;
unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,
IOBASE_SUN3_VMESCSI + 0x4000,
0 };
unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,
SUN3_VEC_VMESCSI1,
0 };
/* check that this machine has an onboard 5380 */
switch(idprom->id_machtype) {
case SM_SUN3|SM_3_160:
case SM_SUN3|SM_3_260:
break;
default:
return 0;
}
if(called)
return 0;
tpnt->proc_name = "Sun3 5380 VME SCSI";
/* setup variables */
tpnt->can_queue =
(setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;
tpnt->cmd_per_lun =
(setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;
tpnt->sg_tablesize =
(setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;
if (setup_hostid >= 0)
tpnt->this_id = setup_hostid;
else {
/* use 7 as default */
tpnt->this_id = 7;
}
ioaddr = 0;
for(i = 0; addrs[i] != 0; i++) {
unsigned char x;
ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,
SUN3_PAGE_TYPE_VME16);
irq = vecs[i];
sun3_scsi_regp = (unsigned char *)ioaddr;
dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);
if(sun3_map_test((unsigned long)dregs, &x)) {
unsigned short oldcsr;
oldcsr = dregs->csr;
dregs->csr = 0;
udelay(SUN3_DMA_DELAY);
if(dregs->csr == 0x1400)
break;
dregs->csr = oldcsr;
}
iounmap((void *)ioaddr);
ioaddr = 0;
}
if(!ioaddr)
return 0;
#ifdef SUPPORT_TAGS
if (setup_use_tagged_queuing < 0)
setup_use_tagged_queuing = USE_TAGGED_QUEUING;
#endif
instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
if(instance == NULL)
return 0;
default_instance = instance;
instance->io_port = (unsigned long) ioaddr;
instance->irq = irq;
NCR5380_init(instance, 0);
instance->n_io_port = 32;
((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
if (request_irq(instance->irq, scsi_sun3_intr,
0, "Sun3SCSI-5380VME", NULL)) {
#ifndef REAL_DMA
printk("scsi%d: IRQ%d not free, interrupts disabled\n",
instance->host_no, instance->irq);
instance->irq = IRQ_NONE;
#else
printk("scsi%d: IRQ%d not free, bailing out\n",
instance->host_no, instance->irq);
return 0;
#endif
}
printk("scsi%d: Sun3 5380 VME at port %lX irq", instance->host_no, instance->io_port);
if (instance->irq == IRQ_NONE)
printk ("s disabled");
else
printk (" %d", instance->irq);
printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
instance->can_queue, instance->cmd_per_lun,
SUN3SCSI_PUBLIC_RELEASE);
printk("\nscsi%d:", instance->host_no);
NCR5380_print_options(instance);
printk("\n");
dregs->csr = 0;
udelay(SUN3_DMA_DELAY);
dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
udelay(SUN3_DMA_DELAY);
dregs->fifo_count = 0;
dregs->fifo_count_hi = 0;
dregs->dma_addr_hi = 0;
dregs->dma_addr_lo = 0;
dregs->dma_count_hi = 0;
dregs->dma_count_lo = 0;
dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
called = 1;
#ifdef RESET_BOOT
sun3_scsi_reset_boot(instance);
#endif
return 1;
}
#ifdef MODULE
int sun3scsi_release (struct Scsi_Host *shpnt)
{
if (shpnt->irq != IRQ_NONE)
free_irq (shpnt->irq, NULL);
iounmap(sun3_scsi_regp);
return 0;
}
#endif
#ifdef RESET_BOOT
/*
* Our 'bus reset on boot' function
*/
static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
{
unsigned long end;
NCR5380_local_declare();
NCR5380_setup(instance);
/*
* Do a SCSI reset to clean up the bus during initialization. No
* messing with the queues, interrupts, or locks necessary here.
*/
printk( "Sun3 SCSI: resetting the SCSI bus..." );
/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
// sun3_disable_irq( IRQ_SUN3_SCSI );
/* get in phase */
NCR5380_write( TARGET_COMMAND_REG,
PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
/* assert RST */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
/* The min. reset hold time is 25us, so 40us should be enough */
udelay( 50 );
/* reset RST and interrupt */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
NCR5380_read( RESET_PARITY_INTERRUPT_REG );
for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
barrier();
/* switch on SCSI IRQ again */
// sun3_enable_irq( IRQ_SUN3_SCSI );
printk( " done\n" );
}
#endif
static const char * sun3scsi_info (struct Scsi_Host *spnt) {
return "";
}
// safe bits for the CSR
#define CSR_GOOD 0x060f
static void scsi_sun3_intr(int irq, void *dummy, struct pt_regs *fp)
{
unsigned short csr = dregs->csr;
dregs->csr &= ~CSR_DMA_ENABLE;
#ifdef SUN3_SCSI_DEBUG
printk("scsi_intr csr %x\n", csr);
#endif
if(csr & ~CSR_GOOD) {
if(csr & CSR_DMA_BUSERR) {
printk("scsi%d: bus error in dma\n", default_instance->host_no);
#ifdef SUN3_SCSI_DEBUG
printk("scsi: residual %x count %x addr %p dmaaddr %x\n",
dregs->fifo_count,
dregs->dma_count_lo | (dregs->dma_count_hi << 16),
sun3_dma_orig_addr,
dregs->dma_addr_lo | (dregs->dma_addr_hi << 16));
#endif
}
if(csr & CSR_DMA_CONFLICT) {
printk("scsi%d: dma conflict\n", default_instance->host_no);
}
}
if(csr & (CSR_SDB_INT | CSR_DMA_INT))
NCR5380_intr(irq, dummy, fp);
}
/*
* Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
* reentering NCR5380_print_status seems to have ugly side effects
*/
/* this doesn't seem to get used at all -- sam */
#if 0
void sun3_sun3_debug (void)
{
unsigned long flags;
NCR5380_local_declare();
if (default_instance) {
save_flags(flags);
cli();
NCR5380_print_status(default_instance);
restore_flags(flags);
}
}
#endif
/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
{
void *addr;
if(sun3_dma_orig_addr != NULL)
dvma_unmap(sun3_dma_orig_addr);
// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);
addr = (void *)dvma_map_vme((unsigned long) data, count);
sun3_dma_orig_addr = addr;
sun3_dma_orig_count = count;
#ifdef SUN3_SCSI_DEBUG
printk("scsi: dma_setup addr %p count %x\n", addr, count);
#endif
// dregs->fifo_count = 0;
#if 0
/* reset fifo */
dregs->csr &= ~CSR_FIFO;
dregs->csr |= CSR_FIFO;
#endif
/* set direction */
if(write_flag)
dregs->csr |= CSR_SEND;
else
dregs->csr &= ~CSR_SEND;
/* reset fifo */
// dregs->csr &= ~CSR_FIFO;
// dregs->csr |= CSR_FIFO;
dregs->csr |= CSR_PACK_ENABLE;
dregs->dma_addr_hi = ((unsigned long)addr >> 16);
dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
dregs->dma_count_hi = 0;
dregs->dma_count_lo = 0;
dregs->fifo_count_hi = 0;
dregs->fifo_count = 0;
#ifdef SUN3_SCSI_DEBUG
printk("scsi: dma_setup done csr %x\n", dregs->csr);
#endif
return count;
}
static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
{
return last_residual;
}
static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted, Scsi_Cmnd *cmd,
int write_flag)
{
if(cmd->request->flags & REQ_CMD)
return wanted;
else
return 0;
}
static int sun3scsi_dma_start(unsigned long count, char *data)
{
unsigned short csr;
csr = dregs->csr;
#ifdef SUN3_SCSI_DEBUG
printk("scsi: dma_start data %p count %x csr %x fifo %x\n", data, count, csr, dregs->fifo_count);
#endif
dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
// if(!(csr & CSR_DMA_ENABLE))
// dregs->csr |= CSR_DMA_ENABLE;
return 0;
}
/* clean up after our dma is done */
static int sun3scsi_dma_finish(int write_flag)
{
unsigned short fifo;
int ret = 0;
sun3_dma_active = 0;
dregs->csr &= ~CSR_DMA_ENABLE;
fifo = dregs->fifo_count;
if(write_flag) {
if((fifo > 0) && (fifo < sun3_dma_orig_count))
fifo++;
}
last_residual = fifo;
#ifdef SUN3_SCSI_DEBUG
printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count);
#endif
/* empty bytes from the fifo which didn't make it */
if((!write_flag) && (dregs->csr & CSR_LEFT)) {
unsigned char *vaddr;
#ifdef SUN3_SCSI_DEBUG
printk("scsi: got left over bytes\n");
#endif
vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
vaddr += (sun3_dma_orig_count - fifo);
vaddr--;
switch(dregs->csr & CSR_LEFT) {
case CSR_LEFT_3:
*vaddr = (dregs->bpack_lo & 0xff00) >> 8;
vaddr--;
case CSR_LEFT_2:
*vaddr = (dregs->bpack_hi & 0x00ff);
vaddr--;
case CSR_LEFT_1:
*vaddr = (dregs->bpack_hi & 0xff00) >> 8;
break;
}
}
dvma_unmap(sun3_dma_orig_addr);
sun3_dma_orig_addr = NULL;
dregs->dma_addr_hi = 0;
dregs->dma_addr_lo = 0;
dregs->dma_count_hi = 0;
dregs->dma_count_lo = 0;
dregs->fifo_count = 0;
dregs->fifo_count_hi = 0;
dregs->csr &= ~CSR_SEND;
// dregs->csr |= CSR_DMA_ENABLE;
#if 0
/* reset fifo */
dregs->csr &= ~CSR_FIFO;
dregs->csr |= CSR_FIFO;
#endif
sun3_dma_setup_done = NULL;
return ret;
}
#include "sun3_NCR5380.c"
static Scsi_Host_Template driver_template = SUN3_NCR5380;
#include "scsi_module.c"
include/asm-m68k/dvma.h
View file @ 0e1cb392
......@@ -22,7 +22,8 @@ extern int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
#define dvma_malloc(x) dvma_malloc_align(x, 0)
#define dvma_map(x, y) dvma_map_align(x, y, 0)
#define dvma_map_vme(x, y) (dvma_map(x, y) & 0xfffff)
#define dvma_map_align_vme(x, y, z) (dvma_map_align (x, y, z) & 0xfffff)
extern unsigned long dvma_map_align(unsigned long kaddr, int len,
int align);
extern void *dvma_malloc_align(unsigned long len, unsigned long align);
......@@ -52,6 +53,8 @@ extern void dvma_free(void *vaddr);
/* virt <-> phys conversions */
#define dvma_vtop(x) ((unsigned long)(x) & 0xffffff)
#define dvma_ptov(x) ((unsigned long)(x) | 0xf000000)
#define dvma_vtovme(x) ((unsigned long)(x) & 0x00fffff)
#define dvma_vmetov(x) ((unsigned long)(x) | 0xff00000)
#define dvma_vtob(x) dvma_vtop(x)
#define dvma_btov(x) dvma_ptov(x)
......
include/asm-m68k/sun3ints.h
View file @ 0e1cb392
......@@ -39,5 +39,11 @@ extern int show_sun3_interrupts(struct seq_file *, void *);
extern void sun3_process_int(int, struct pt_regs *);
extern volatile unsigned char* sun3_intreg;
/* master list of VME vectors -- don't fuck with this */
#define SUN3_VEC_FLOPPY 0x40
#define SUN3_VEC_VMESCSI0 0x40
#define SUN3_VEC_VMESCSI1 0x41
#define SUN3_VEC_CG 0xA8
#endif /* SUN3INTS_H */
include/asm-m68k/sun3mmu.h
View file @ 0e1cb392
......@@ -164,6 +164,7 @@ extern __inline__ void sun3_put_context(unsigned char c)
extern void *sun3_ioremap(unsigned long phys, unsigned long size,
unsigned long type);
extern int sun3_map_test(unsigned long addr, char *val);
#endif /* !__ASSEMBLY__ */
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7