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, 260 insertions, 0 deletions

diff --git a/drivers/scsi/a2091.c b/drivers/scsi/a2091.c
new file mode 100644
index 0000000..9928a2f
--- /dev/null
+++ b/drivers/scsi/a2091.c
@@ -0,0 +1,260 @@
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/sched.h>
+#include <linux/version.h>
+#include <linux/init.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 <linux/zorro.h>
+#include <asm/irq.h>
+#include <linux/spinlock.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "wd33c93.h"
+#include "a2091.h"
+
+#include<linux/stat.h>
+
+#define DMA(ptr) ((a2091_scsiregs *)((ptr)->base))
+#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
+
+static irqreturn_t a2091_intr (int irq, void *_instance, struct pt_regs *fp)
+{
+    unsigned long flags;
+    unsigned int status;
+    struct Scsi_Host *instance = (struct Scsi_Host *)_instance;
+
+    status = DMA(instance)->ISTR;
+    if (!(status & (ISTR_INT_F|ISTR_INT_P)) || !(status & ISTR_INTS))
+	return IRQ_NONE;
+
+    spin_lock_irqsave(instance->host_lock, flags);
+    wd33c93_intr(instance);
+    spin_unlock_irqrestore(instance->host_lock, flags);
+    return IRQ_HANDLED;
+}
+
+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);
+    struct Scsi_Host *instance = cmd->device->host;
+
+    /* don't allow DMA if the physical address is bad */
+    if (addr & A2091_XFER_MASK ||
+	(!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
+    {
+	HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511)
+	    & ~0x1ff;
+	HDATA(instance)->dma_bounce_buffer =
+	    kmalloc (HDATA(instance)->dma_bounce_len, GFP_KERNEL);
+	
+	/* can't allocate memory; use PIO */
+	if (!HDATA(instance)->dma_bounce_buffer) {
+	    HDATA(instance)->dma_bounce_len = 0;
+	    return 1;
+	}
+
+	/* get the physical address of the bounce buffer */
+	addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer);
+
+	/* the bounce buffer may not be in the first 16M of physmem */
+	if (addr & A2091_XFER_MASK) {
+	    /* we could use chipmem... maybe later */
+	    kfree (HDATA(instance)->dma_bounce_buffer);
+	    HDATA(instance)->dma_bounce_buffer = NULL;
+	    HDATA(instance)->dma_bounce_len = 0;
+	    return 1;
+	}
+
+	if (!dir_in) {
+	    /* copy to bounce buffer for a write */
+	    if (cmd->use_sg)
+#if 0
+		panic ("scsi%ddma: incomplete s/g support",
+		       instance->host_no);
+#else
+		memcpy (HDATA(instance)->dma_bounce_buffer,
+			cmd->SCp.ptr, cmd->SCp.this_residual);
+#endif
+	    else
+		memcpy (HDATA(instance)->dma_bounce_buffer,
+			cmd->request_buffer, cmd->request_bufflen);
+	}
+    }
+
+    /* setup dma direction */
+    if (!dir_in)
+	cntr |= CNTR_DDIR;
+
+    /* remember direction */
+    HDATA(cmd->device->host)->dma_dir = dir_in;
+
+    DMA(cmd->device->host)->CNTR = cntr;
+
+    /* setup DMA *physical* address */
+    DMA(cmd->device->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 */
+    DMA(cmd->device->host)->ST_DMA = 1;
+
+    /* 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;
+
+    /* disable SCSI interrupts */
+    DMA(instance)->CNTR = cntr;
+
+    /* flush if we were reading */
+    if (HDATA(instance)->dma_dir) {
+	DMA(instance)->FLUSH = 1;
+	while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
+	    ;
+    }
+
+    /* clear a possible interrupt */
+    DMA(instance)->CINT = 1;
+
+    /* stop DMA */
+    DMA(instance)->SP_DMA = 1;
+
+    /* restore the CONTROL bits (minus the direction flag) */
+    DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
+
+    /* copy from a bounce buffer, if necessary */
+    if (status && HDATA(instance)->dma_bounce_buffer) {
+	if (SCpnt && SCpnt->use_sg) {
+#if 0
+	    panic ("scsi%d: incomplete s/g support",
+		   instance->host_no);
+#else
+	    if( HDATA(instance)->dma_dir )
+		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;
+	    
+#endif
+	} 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 a2091_detect(Scsi_Host_Template *tpnt)
+{
+    static unsigned char called = 0;
+    struct Scsi_Host *instance;
+    unsigned long address;
+    struct zorro_dev *z = NULL;
+    wd33c93_regs regs;
+    int num_a2091 = 0;
+
+    if (!MACH_IS_AMIGA || called)
+	return 0;
+    called = 1;
+
+    tpnt->proc_name = "A2091";
+    tpnt->proc_info = &wd33c93_proc_info;
+
+    while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
+	if (z->id != ZORRO_PROD_CBM_A590_A2091_1 &&
+	    z->id != ZORRO_PROD_CBM_A590_A2091_2)
+	    continue;
+	address = z->resource.start;
+	if (!request_mem_region(address, 256, "wd33c93"))
+	    continue;
+
+	instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata));
+	if (instance == NULL) {
+	    release_mem_region(address, 256);
+	    continue;
+	}
+	instance->base = ZTWO_VADDR(address);
+	instance->irq = IRQ_AMIGA_PORTS;
+	instance->unique_id = z->slotaddr;
+	DMA(instance)->DAWR = DAWR_A2091;
+	regs.SASR = &(DMA(instance)->SASR);
+	regs.SCMD = &(DMA(instance)->SCMD);
+	wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
+	request_irq(IRQ_AMIGA_PORTS, a2091_intr, SA_SHIRQ, "A2091 SCSI",
+		    instance);
+	DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
+	num_a2091++;
+    }
+
+    return num_a2091;
+}
+
+static int a2091_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		= "A2901",
+	.name			= "Commodore A2091/A590 SCSI",
+	.detect			= a2091_detect,
+	.release		= a2091_release,
+	.queuecommand		= wd33c93_queuecommand,
+	.eh_abort_handler	= wd33c93_abort,
+	.eh_bus_reset_handler	= a2091_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		= DISABLE_CLUSTERING
+};
+
+
+#include "scsi_module.c"
+
+int a2091_release(struct Scsi_Host *instance)
+{
+#ifdef MODULE
+	DMA(instance)->CNTR = 0;
+	release_mem_region(ZTWO_PADDR(instance->base), 256);
+	free_irq(IRQ_AMIGA_PORTS, instance);
+	wd33c93_release();
+#endif
+	return 1;
+}
+
+MODULE_LICENSE("GPL");