(2006-08-06) rescue-bootcd

extra/linux-2.6.10/drivers/scsi/mvme147.c

@@ -0,0 +1,155 @@
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/sched.h>
+#include <linux/version.h>
+#include <linux/interrupt.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/mvme147hw.h>
+#include <asm/irq.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "wd33c93.h"
+#include "mvme147.h"
+
+#include<linux/stat.h>
+
+#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
+
+static struct Scsi_Host *mvme147_host = NULL;
+
+static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp)
+{
+    if (irq == MVME147_IRQ_SCSI_PORT)
+	wd33c93_intr (mvme147_host);
+    else
+	m147_pcc->dma_intr = 0x89;	/* Ack and enable ints */
+    return IRQ_HANDLED;
+}
+
+static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
+{
+    unsigned char flags = 0x01;
+    unsigned long addr = virt_to_bus(cmd->SCp.ptr);
+
+    /* setup dma direction */
+    if (!dir_in)
+	flags |= 0x04;
+
+    /* remember direction */
+    HDATA(mvme147_host)->dma_dir = dir_in;
+
+    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 */
+    m147_pcc->dma_bcr   = cmd->SCp.this_residual | (1<<24);
+    m147_pcc->dma_dadr  = addr;
+    m147_pcc->dma_cntrl = flags;
+
+    /* return success */
+    return 0;
+}
+
+static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
+		      int status)
+{
+    m147_pcc->dma_cntrl = 0;
+}
+
+int mvme147_detect(Scsi_Host_Template *tpnt)
+{
+    static unsigned char called = 0;
+    wd33c93_regs regs;
+
+    if (!MACH_IS_MVME147 || called)
+	return 0;
+    called++;
+
+    tpnt->proc_name = "MVME147";
+    tpnt->proc_info = &wd33c93_proc_info;
+
+    mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
+    if (!mvme147_host)
+	    goto err_out;
+
+    mvme147_host->base = 0xfffe4000;
+    mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
+    regs.SASR = (volatile unsigned char *)0xfffe4000;
+    regs.SCMD = (volatile unsigned char *)0xfffe4001;
+    wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
+
+    if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
+	    goto err_unregister;
+    if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
+	    goto err_free_irq;
+#if 0	/* Disabled; causes problems booting */
+    m147_pcc->scsi_interrupt = 0x10;	/* Assert SCSI bus reset */
+    udelay(100);
+    m147_pcc->scsi_interrupt = 0x00;	/* Negate SCSI bus reset */
+    udelay(2000);
+    m147_pcc->scsi_interrupt = 0x40;	/* Clear bus reset interrupt */
+#endif
+    m147_pcc->scsi_interrupt = 0x09;	/* Enable interrupt */
+
+    m147_pcc->dma_cntrl = 0x00;		/* ensure DMA is stopped */
+    m147_pcc->dma_intr = 0x89;		/* Ack and enable ints */
+
+    return 1;
+
+ err_free_irq:
+    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
+ err_unregister:
+    wd33c93_release();
+    scsi_unregister(mvme147_host);
+ err_out:
+    return 0;
+}
+
+static int mvme147_bus_reset(Scsi_Cmnd *cmd)
+{
+	/* FIXME perform bus-specific reset */
+	wd33c93_host_reset(cmd);
+	return SUCCESS;
+}
+
+#define HOSTS_C
+
+#include "mvme147.h"
+
+static Scsi_Host_Template driver_template = {
+	.proc_name		= "MVME147",
+	.name			= "MVME147 built-in SCSI",
+	.detect			= mvme147_detect,
+	.release		= mvme147_release,
+	.queuecommand		= wd33c93_queuecommand,
+	.eh_abort_handler	= wd33c93_abort,
+	.eh_bus_reset_handler	= mvme147_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 mvme147_release(struct Scsi_Host *instance)
+{
+#ifdef MODULE
+    /* XXX Make sure DMA is stopped! */
+    wd33c93_release();
+    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
+    free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
+#endif
+    return 1;
+}