linux/drivers/scsi/a3000.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

252 lines
6.5 KiB
C

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include <asm/irq.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "wd33c93.h"
#include "a3000.h"
#include<linux/stat.h>
#define DMA(ptr) ((a3000_scsiregs *)((ptr)->base))
#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
static struct Scsi_Host *a3000_host = NULL;
static irqreturn_t a3000_intr (int irq, void *dummy)
{
unsigned long flags;
unsigned int status = DMA(a3000_host)->ISTR;
if (!(status & ISTR_INT_P))
return IRQ_NONE;
if (status & ISTR_INTS)
{
spin_lock_irqsave(a3000_host->host_lock, flags);
wd33c93_intr (a3000_host);
spin_unlock_irqrestore(a3000_host->host_lock, flags);
return IRQ_HANDLED;
}
printk("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);
return IRQ_NONE;
}
static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
unsigned long addr = virt_to_bus(cmd->SCp.ptr);
/*
* if the physical address has the wrong alignment, or if
* physical address is bad, or if it is a write and at the
* end of a physical memory chunk, then allocate a bounce
* buffer
*/
if (addr & A3000_XFER_MASK ||
(!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
{
HDATA(a3000_host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
& ~0x1ff;
HDATA(a3000_host)->dma_bounce_buffer =
kmalloc (HDATA(a3000_host)->dma_bounce_len, GFP_KERNEL);
/* can't allocate memory; use PIO */
if (!HDATA(a3000_host)->dma_bounce_buffer) {
HDATA(a3000_host)->dma_bounce_len = 0;
return 1;
}
if (!dir_in) {
/* copy to bounce buffer for a write */
if (cmd->use_sg) {
memcpy (HDATA(a3000_host)->dma_bounce_buffer,
cmd->SCp.ptr, cmd->SCp.this_residual);
} else
memcpy (HDATA(a3000_host)->dma_bounce_buffer,
cmd->request_buffer, cmd->request_bufflen);
}
addr = virt_to_bus(HDATA(a3000_host)->dma_bounce_buffer);
}
/* setup dma direction */
if (!dir_in)
cntr |= CNTR_DDIR;
/* remember direction */
HDATA(a3000_host)->dma_dir = dir_in;
DMA(a3000_host)->CNTR = cntr;
/* setup DMA *physical* address */
DMA(a3000_host)->ACR = addr;
if (dir_in)
/* invalidate any cache */
cache_clear (addr, cmd->SCp.this_residual);
else
/* push any dirty cache */
cache_push (addr, cmd->SCp.this_residual);
/* start DMA */
mb(); /* make sure setup is completed */
DMA(a3000_host)->ST_DMA = 1;
mb(); /* make sure DMA has started before next IO */
/* return success */
return 0;
}
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
/* disable SCSI interrupts */
unsigned short cntr = CNTR_PDMD;
if (!HDATA(instance)->dma_dir)
cntr |= CNTR_DDIR;
DMA(instance)->CNTR = cntr;
mb(); /* make sure CNTR is updated before next IO */
/* flush if we were reading */
if (HDATA(instance)->dma_dir) {
DMA(instance)->FLUSH = 1;
mb(); /* don't allow prefetch */
while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
barrier();
mb(); /* no IO until FLUSH is done */
}
/* clear a possible interrupt */
/* I think that this CINT is only necessary if you are
* using the terminal count features. HM 7 Mar 1994
*/
DMA(instance)->CINT = 1;
/* stop DMA */
DMA(instance)->SP_DMA = 1;
mb(); /* make sure DMA is stopped before next IO */
/* restore the CONTROL bits (minus the direction flag) */
DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
mb(); /* make sure CNTR is updated before next IO */
/* copy from a bounce buffer, if necessary */
if (status && HDATA(instance)->dma_bounce_buffer) {
if (SCpnt && SCpnt->use_sg) {
if (HDATA(instance)->dma_dir && SCpnt)
memcpy (SCpnt->SCp.ptr,
HDATA(instance)->dma_bounce_buffer,
SCpnt->SCp.this_residual);
kfree (HDATA(instance)->dma_bounce_buffer);
HDATA(instance)->dma_bounce_buffer = NULL;
HDATA(instance)->dma_bounce_len = 0;
} else {
if (HDATA(instance)->dma_dir && SCpnt)
memcpy (SCpnt->request_buffer,
HDATA(instance)->dma_bounce_buffer,
SCpnt->request_bufflen);
kfree (HDATA(instance)->dma_bounce_buffer);
HDATA(instance)->dma_bounce_buffer = NULL;
HDATA(instance)->dma_bounce_len = 0;
}
}
}
int __init a3000_detect(struct scsi_host_template *tpnt)
{
wd33c93_regs regs;
if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(A3000_SCSI))
return 0;
if (!request_mem_region(0xDD0000, 256, "wd33c93"))
return 0;
tpnt->proc_name = "A3000";
tpnt->proc_info = &wd33c93_proc_info;
a3000_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
if (a3000_host == NULL)
goto fail_register;
a3000_host->base = ZTWO_VADDR(0xDD0000);
a3000_host->irq = IRQ_AMIGA_PORTS;
DMA(a3000_host)->DAWR = DAWR_A3000;
regs.SASR = &(DMA(a3000_host)->SASR);
regs.SCMD = &(DMA(a3000_host)->SCMD);
wd33c93_init(a3000_host, regs, dma_setup, dma_stop, WD33C93_FS_12_15);
if (request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED, "A3000 SCSI",
a3000_intr))
goto fail_irq;
DMA(a3000_host)->CNTR = CNTR_PDMD | CNTR_INTEN;
return 1;
fail_irq:
wd33c93_release();
scsi_unregister(a3000_host);
fail_register:
release_mem_region(0xDD0000, 256);
return 0;
}
static int a3000_bus_reset(struct scsi_cmnd *cmd)
{
/* FIXME perform bus-specific reset */
/* FIXME 2: kill this entire function, which should
cause mid-layer to call wd33c93_host_reset anyway? */
spin_lock_irq(cmd->device->host->host_lock);
wd33c93_host_reset(cmd);
spin_unlock_irq(cmd->device->host->host_lock);
return SUCCESS;
}
#define HOSTS_C
static struct scsi_host_template driver_template = {
.proc_name = "A3000",
.name = "Amiga 3000 built-in SCSI",
.detect = a3000_detect,
.release = a3000_release,
.queuecommand = wd33c93_queuecommand,
.eh_abort_handler = wd33c93_abort,
.eh_bus_reset_handler = a3000_bus_reset,
.eh_host_reset_handler = wd33c93_host_reset,
.can_queue = CAN_QUEUE,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING
};
#include "scsi_module.c"
int a3000_release(struct Scsi_Host *instance)
{
wd33c93_release();
DMA(instance)->CNTR = 0;
release_mem_region(0xDD0000, 256);
free_irq(IRQ_AMIGA_PORTS, a3000_intr);
return 1;
}
MODULE_LICENSE("GPL");