Add realtek target files

Signed-off-by: Roman Yeryomin <roman@advem.lv>

1 files changed, 334 insertions, 0 deletions

diff --git a/target/linux/realtek/files/arch/rlx/mm/dma-default.c b/target/linux/realtek/files/arch/rlx/mm/dma-default.c
new file mode 100644
index 000000000..9fe69f2fb
--- /dev/null
+++ b/target/linux/realtek/files/arch/rlx/mm/dma-default.c
@@ -0,0 +1,334 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>
+ * Copyright (C) 2000, 2001, 06  Ralf Baechle <ralf@linux-mips.org>
+ * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+ */
+
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/string.h>
+
+#include <asm/cache.h>
+#include <asm/io.h>
+
+#include <dma-coherence.h>
+
+static inline unsigned long dma_addr_to_virt(dma_addr_t dma_addr)
+{
+  unsigned long addr = plat_dma_addr_to_phys(dma_addr);
+
+  return (unsigned long)phys_to_virt(addr);
+}
+
+/*
+ * Warning on the terminology - Linux calls an uncached area coherent;
+ * MIPS terminology calls memory areas with hardware maintained coherency
+ * coherent.
+ */
+
+static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
+{
+  /* ignore region specifiers */
+  gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM);
+
+#ifdef CONFIG_ZONE_DMA
+  if (dev == NULL)
+    gfp |= __GFP_DMA;
+  else if (dev->coherent_dma_mask < DMA_BIT_MASK(24))
+    gfp |= __GFP_DMA;
+  else
+    ;
+#endif
+#ifdef CONFIG_ZONE_DMA32
+  if (dev->coherent_dma_mask < DMA_BIT_MASK(32))
+    gfp |= __GFP_DMA32;
+  else
+    ;
+#endif
+
+  /* Don't invoke OOM killer */
+  gfp |= __GFP_NORETRY;
+
+  return gfp;
+}
+
+void *dma_alloc_noncoherent(struct device *dev, size_t size,
+	dma_addr_t * dma_handle, gfp_t gfp)
+{
+	void *ret;
+
+	gfp = massage_gfp_flags(dev, gfp);
+
+	ret = (void *) __get_free_pages(gfp, get_order(size));
+
+	if (ret != NULL) {
+		memset(ret, 0, size);
+		*dma_handle = plat_map_dma_mem(dev, ret, size);
+	}
+
+	return ret;
+}
+
+EXPORT_SYMBOL(dma_alloc_noncoherent);
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+	dma_addr_t * dma_handle, gfp_t gfp)
+{
+  void *ret;
+
+  gfp = massage_gfp_flags(dev, gfp);
+
+  ret = (void *) __get_free_pages(gfp, get_order(size));
+
+  if (ret)
+    {
+      memset(ret, 0, size);
+      *dma_handle = plat_map_dma_mem(dev, ret, size);
+
+      dma_cache_wback_inv((unsigned long) ret, size);
+      ret = UNCAC_ADDR(ret);
+    }
+
+  return ret;
+}
+
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+	dma_addr_t dma_handle)
+{
+	plat_unmap_dma_mem(dev, dma_handle);
+	free_pages((unsigned long) vaddr, get_order(size));
+}
+
+EXPORT_SYMBOL(dma_free_noncoherent);
+
+void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+	dma_addr_t dma_handle)
+{
+	unsigned long addr = (unsigned long) vaddr;
+
+	plat_unmap_dma_mem(dev, dma_handle);
+    addr = CAC_ADDR(addr);
+
+	free_pages(addr, get_order(size));
+}
+
+EXPORT_SYMBOL(dma_free_coherent);
+
+static inline void __dma_sync(unsigned long addr, size_t size,
+	enum dma_data_direction direction)
+{
+	switch (direction) {
+	case DMA_TO_DEVICE:
+		dma_cache_wback(addr, size);
+		break;
+
+	case DMA_FROM_DEVICE:
+		dma_cache_inv(addr, size);
+		break;
+
+	case DMA_BIDIRECTIONAL:
+		dma_cache_wback_inv(addr, size);
+		break;
+
+	default:
+		BUG();
+	}
+}
+
+dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+	enum dma_data_direction direction)
+{
+	unsigned long addr = (unsigned long) ptr;
+
+    __dma_sync(addr, size, direction);
+
+	return plat_map_dma_mem(dev, ptr, size);
+}
+
+EXPORT_SYMBOL(dma_map_single);
+
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+	enum dma_data_direction direction)
+{
+	plat_unmap_dma_mem(dev, dma_addr);
+}
+
+EXPORT_SYMBOL(dma_unmap_single);
+
+int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	enum dma_data_direction direction)
+{
+  int i;
+
+  BUG_ON(direction == DMA_NONE);
+
+  for (i = 0; i < nents; i++, sg++)
+    {
+      unsigned long addr;
+
+      addr = (unsigned long) sg_virt(sg);
+      if (addr)
+        __dma_sync(addr, sg->length, direction);
+
+      sg->dma_address = plat_map_dma_mem(dev, (void *)addr, sg->length);
+    }
+
+  return nents;
+}
+
+EXPORT_SYMBOL(dma_map_sg);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+	unsigned long offset, size_t size, enum dma_data_direction direction)
+{
+  unsigned long addr;
+
+  BUG_ON(direction == DMA_NONE);
+
+  addr = (unsigned long) page_address(page) + offset;
+  __dma_sync(addr, size, direction);
+
+  return plat_map_dma_mem_page(dev, page) + offset;
+}
+
+EXPORT_SYMBOL(dma_map_page);
+
+void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+	enum dma_data_direction direction)
+{
+  unsigned long addr;
+  int i;
+
+  BUG_ON(direction == DMA_NONE);
+
+  for (i = 0; i < nhwentries; i++, sg++)
+    {
+      if (direction != DMA_TO_DEVICE)
+        {
+          addr = (unsigned long) sg_virt(sg);
+          if (addr)
+            __dma_sync(addr, sg->length, direction);
+        }
+
+      plat_unmap_dma_mem(dev, sg->dma_address);
+    }
+}
+
+EXPORT_SYMBOL(dma_unmap_sg);
+
+void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+	size_t size, enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+
+	#ifdef CONFIG_ARCH_CPU_RLX5281
+	__asm__ __volatile__(
+       ".set\tpush\n"
+       ".set\tnoreorder\n"
+       "\tmtc0\t$0, $20\n"
+       "\tli\t$8, 0x200\n"
+       "\tmtc0\t$8, $20\n"
+       ".set\tpop\n");
+	#endif
+}
+
+EXPORT_SYMBOL(dma_sync_single_for_cpu);
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+	size_t size, enum dma_data_direction direction)
+{
+  unsigned long addr;
+
+  BUG_ON(direction == DMA_NONE);
+
+  plat_extra_sync_for_device(dev);
+  addr = dma_addr_to_virt(dma_handle);
+  __dma_sync(addr, size, direction);
+}
+
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+	unsigned long offset, size_t size, enum dma_data_direction direction)
+{
+  BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+
+void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+	unsigned long offset, size_t size, enum dma_data_direction direction)
+{
+  unsigned long addr;
+  BUG_ON(direction == DMA_NONE);
+
+  plat_extra_sync_for_device(dev);
+  addr = dma_addr_to_virt(dma_handle);
+  __dma_sync(addr + offset, size, direction);
+}
+
+EXPORT_SYMBOL(dma_sync_single_range_for_device);
+
+void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+	enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+	enum dma_data_direction direction)
+{
+  int i;
+
+  BUG_ON(direction == DMA_NONE);
+
+  /* Make sure that gcc doesn't leave the empty loop body.  */
+  for (i = 0; i < nelems; i++, sg++)
+    __dma_sync((unsigned long)page_address(sg_page(sg)),
+               sg->length, direction);
+}
+
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return plat_dma_mapping_error(dev, dma_addr);
+}
+
+EXPORT_SYMBOL(dma_mapping_error);
+
+int dma_supported(struct device *dev, u64 mask)
+{
+	return plat_dma_supported(dev, mask);
+}
+
+EXPORT_SYMBOL(dma_supported);
+
+int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+EXPORT_SYMBOL(dma_is_consistent);
+
+void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+	       enum dma_data_direction direction)
+{
+  BUG_ON(direction == DMA_NONE);
+
+  plat_extra_sync_for_device(dev);
+  __dma_sync((unsigned long)vaddr, size, direction);
+}
+
+EXPORT_SYMBOL(dma_cache_sync);