1 files changed, 137 insertions, 0 deletions

diff --git a/drivers/sbus/dvma.c b/drivers/sbus/dvma.c
new file mode 100644
index 000000000000..378a1d68024d
--- /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