Linux-2.6.12-rc2v2.6.12-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, 137 insertions, 0 deletions

diff --git a/drivers/sbus/dvma.c b/drivers/sbus/dvma.c
new file mode 100644
index 0000000..378a1d6
--- /dev/null
+++ b/drivers/sbus/dvma.c
@@ -0,0 +1,137 @@
+/* dvma.c:  Routines that are used to access DMA on the Sparc SBus.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/oplib.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/sbus.h>
+
+struct sbus_dma *dma_chain;
+
+void __init init_one_dvma(struct sbus_dma *dma, int num_dma)
+{
+	printk("dma%d: ", num_dma);
+	
+	dma->next = NULL;
+	dma->running = 0;      /* No transfers going on as of yet */
+	dma->allocated = 0;    /* No one has allocated us yet */
+	switch(sbus_readl(dma->regs + DMA_CSR)&DMA_DEVICE_ID) {
+	case DMA_VERS0:
+		dma->revision = dvmarev0;
+		printk("Revision 0 ");
+		break;
+	case DMA_ESCV1:
+		dma->revision = dvmaesc1;
+		printk("ESC Revision 1 ");
+		break;
+	case DMA_VERS1:
+		dma->revision = dvmarev1;
+		printk("Revision 1 ");
+		break;
+	case DMA_VERS2:
+		dma->revision = dvmarev2;
+		printk("Revision 2 ");
+		break;
+	case DMA_VERHME:
+		dma->revision = dvmahme;
+		printk("HME DVMA gate array ");
+		break;
+	case DMA_VERSPLUS:
+		dma->revision = dvmarevplus;
+		printk("Revision 1 PLUS ");
+		break;
+	default:
+		printk("unknown dma version %08x",
+		       sbus_readl(dma->regs + DMA_CSR) & DMA_DEVICE_ID);
+		dma->allocated = 1;
+		break;
+	}
+	printk("\n");
+}
+
+/* Probe this SBus DMA module(s) */
+void __init dvma_init(struct sbus_bus *sbus)
+{
+	struct sbus_dev *this_dev;
+	struct sbus_dma *dma;
+	struct sbus_dma *dchain;
+	static int num_dma = 0;
+
+	for_each_sbusdev(this_dev, sbus) {
+		char *name = this_dev->prom_name;
+		int hme = 0;
+
+		if(!strcmp(name, "SUNW,fas"))
+			hme = 1;
+		else if(strcmp(name, "dma") &&
+			strcmp(name, "ledma") &&
+			strcmp(name, "espdma"))
+			continue;
+
+		/* Found one... */
+		dma = kmalloc(sizeof(struct sbus_dma), GFP_ATOMIC);
+
+		dma->sdev = this_dev;
+
+		/* Put at end of dma chain */
+		dchain = dma_chain;
+		if(dchain) {
+			while(dchain->next)
+				dchain = dchain->next;
+			dchain->next = dma;
+		} else {
+			/* We're the first in line */
+			dma_chain = dma;
+		}
+
+		dma->regs = sbus_ioremap(&dma->sdev->resource[0], 0,
+					 dma->sdev->resource[0].end - dma->sdev->resource[0].start + 1,
+					 "dma");
+
+		dma->node = dma->sdev->prom_node;
+		
+		init_one_dvma(dma, num_dma++);
+	}
+}
+
+#ifdef CONFIG_SUN4
+
+#include <asm/sun4paddr.h>
+
+void __init sun4_dvma_init(void)
+{
+	struct sbus_dma *dma;
+	struct resource r;
+
+	if(sun4_dma_physaddr) {
+		dma = kmalloc(sizeof(struct sbus_dma), GFP_ATOMIC);
+
+		/* No SBUS */
+		dma->sdev = NULL;
+
+		/* Only one DMA device */
+		dma_chain = dma;
+
+		memset(&r, 0, sizeof(r));
+		r.start = sun4_dma_physaddr;
+		dma->regs = sbus_ioremap(&r, 0, PAGE_SIZE, "dma");
+
+		/* No prom node */
+		dma->node = 0x0;
+
+		init_one_dvma(dma, 0);
+	} else {
+	  	dma_chain = NULL;
+	}
+}
+
+#endif