Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 245 insertions, 0 deletions

diff --git a/drivers/scsi/a3000.c b/drivers/scsi/a3000.c
new file mode 100644
index 0000000..f8a89ec
--- /dev/null
+++ b/drivers/scsi/a3000.c
@@ -0,0 +1,245 @@
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/sched.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, struct pt_regs *fp)
+{
+	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 (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, 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(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, SA_SHIRQ, "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(Scsi_Cmnd *cmd)
+{
+	/* FIXME perform bus-specific reset */
+	wd33c93_host_reset(cmd);
+	return SUCCESS;
+}
+
+#define HOSTS_C
+
+static 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");