- Fixed the build-2.4 tree to compile with 2.4.18 kernels.

- Moved some generic stuff from budget-core.c to saa7146_core.c where it belongs

----------------------------------------------------------------------

3 files changed, 66 insertions, 19 deletions

diff --git a/linux/drivers/media/common/saa7146.h b/linux/drivers/media/common/saa7146.h
index fd1cb221d..dcb4510c5 100644
--- a/linux/drivers/media/common/saa7146.h
+++ b/linux/drivers/media/common/saa7146.h
@@ -14,17 +14,13 @@
 #include <asm/io.h>		/* for accessing devices */
 #include <linux/stringify.h>
 
+#include "compat.h"
+
 #define SAA7146_VERSION_CODE KERNEL_VERSION(0,5,0)
 
 #define saa7146_write(sxy,adr,dat)    writel((dat),(sxy->mem+(adr)))
 #define saa7146_read(sxy,adr)         readl(sxy->mem+(adr))
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,51)
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,20)) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
-#define BUG_ON(condition) do { if ((condition)!=0) BUG(); } while(0)
-#endif
-#endif
-
 extern unsigned int saa7146_debug;
 
 //#define DEBUG_PROLOG printk("(0x%08x)(0x%08x) %s: %s(): ",(dev==0?-1:(dev->mem==0?-1:saa7146_read(dev,RPS_ADDR0))),(dev==0?-1:(dev->mem==0?-1:saa7146_read(dev,IER))),__stringify(KBUILD_MODNAME),__FUNCTION__)
@@ -152,6 +148,7 @@ struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc);
 int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt);
 void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt);
 void saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, struct scatterlist *list, int length );
+char *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt);
 void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data);
 
 /* some memory sizes */
diff --git a/linux/drivers/media/common/saa7146_core.c b/linux/drivers/media/common/saa7146_core.c
index 8142adb55..8f894a102 100644
--- a/linux/drivers/media/common/saa7146_core.c
+++ b/linux/drivers/media/common/saa7146_core.c
@@ -45,11 +45,73 @@ static void dump_registers(struct saa7146_dev* dev)
 	}
 }
 
+/****************************************************************************
+ * general helper functions
+ ****************************************************************************/
+
+/* this is videobuf_vmalloc_to_sg() from video-buf.c */
+static
+struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
+{
+	struct scatterlist *sglist;
+	struct page *pg;
+	int i;
+
+	sglist = kmalloc(sizeof(struct scatterlist)*nr_pages, GFP_KERNEL);
+	if (NULL == sglist)
+		return NULL;
+	memset(sglist,0,sizeof(struct scatterlist)*nr_pages);
+	for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) {
+		pg = vmalloc_to_page(virt);
+		if (NULL == pg)
+			goto err;
+		if (PageHighMem(pg))
+			BUG();
+		sglist[i].page   = pg;
+		sglist[i].length = PAGE_SIZE;
+	}
+	return sglist;
+	
+ err:
+	kfree(sglist);
+	return NULL;
+}
+
 /********************************************************************************/
 /* common page table functions */
 
 #define SAA7146_PGTABLE_SIZE 4096
 
+char *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt)
+{
+	struct scatterlist *slist = NULL;
+	int pages = (length+PAGE_SIZE-1)/PAGE_SIZE;
+	char *mem = vmalloc(length);
+	int slen = 0;
+
+	if (NULL == mem) {
+		return NULL;
+	}
+
+	if (!(slist = vmalloc_to_sg(mem, pages))) {
+		vfree(mem);
+		return NULL;
+	}
+
+	if (saa7146_pgtable_alloc(pci, pt)) {
+		kfree(slist);
+		vfree(mem);
+		return NULL;
+	}
+	
+	slen = pci_map_sg(pci,slist,pages,PCI_DMA_FROMDEVICE);
+	saa7146_pgtable_build_single(pci, pt, slist, slen);
+
+	/* fixme: here's a memory leak: slist never gets freed by any other
+	   function ...*/
+	return mem;
+}
+
 void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt)
 {
 //fm	DEB_EE(("pci:%p, pt:%p\n",pci,pt));
@@ -443,6 +505,7 @@ EXPORT_SYMBOL_GPL(saa7146_unregister_extension);
 EXPORT_SYMBOL_GPL(saa7146_pgtable_alloc);
 EXPORT_SYMBOL_GPL(saa7146_pgtable_free);
 EXPORT_SYMBOL_GPL(saa7146_pgtable_build_single);
+EXPORT_SYMBOL_GPL(saa7146_vmalloc_build_pgtable);
 
 EXPORT_SYMBOL_GPL(saa7146_setgpio);
 
diff --git a/linux/drivers/media/common/saa7146_fops.c b/linux/drivers/media/common/saa7146_fops.c
index 9048bc339..9ff5b1650 100644
--- a/linux/drivers/media/common/saa7146_fops.c
+++ b/linux/drivers/media/common/saa7146_fops.c
@@ -4,19 +4,6 @@
 	#define KBUILD_MODNAME saa7146
 #endif
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,48))
-static inline 
-int try_module_get(struct module *mod)
-{
-	if (!MOD_CAN_QUERY(mod))
-		return 0;
-	__MOD_INC_USE_COUNT(mod);
-	return 1;
-}
-
-#define module_put(mod) __MOD_DEC_USE_COUNT(mod)
-#endif
-
 #define BOARD_CAN_DO_VBI(dev)   (dev->revision != 0 && dev->vv_data->vbi_minor != -1) 
 
 /********************************************************************************/