arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 172 deletions

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
deleted file mode 100644
index 477bb29a7987..000000000000
--- a/arch/blackfin/kernel/dma-mapping.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
- * Dynamic DMA mapping support
- *
- * Copyright 2005-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later
- */
-
-#include <linux/types.h>
-#include <linux/gfp.h>
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <linux/dma-mapping.h>
-#include <linux/scatterlist.h>
-#include <linux/export.h>
-#include <linux/bitmap.h>
-
-static spinlock_t dma_page_lock;
-static unsigned long *dma_page;
-static unsigned int dma_pages;
-static unsigned long dma_base;
-static unsigned long dma_size;
-static unsigned int dma_initialized;
-
-static void dma_alloc_init(unsigned long start, unsigned long end)
-{
-	spin_lock_init(&dma_page_lock);
-	dma_initialized = 0;
-
-	dma_page = (unsigned long *)__get_free_page(GFP_KERNEL);
-	memset(dma_page, 0, PAGE_SIZE);
-	dma_base = PAGE_ALIGN(start);
-	dma_size = PAGE_ALIGN(end) - PAGE_ALIGN(start);
-	dma_pages = dma_size >> PAGE_SHIFT;
-	memset((void *)dma_base, 0, DMA_UNCACHED_REGION);
-	dma_initialized = 1;
-
-	printk(KERN_INFO "%s: dma_page @ 0x%p - %d pages at 0x%08lx\n", __func__,
-	       dma_page, dma_pages, dma_base);
-}
-
-static inline unsigned int get_pages(size_t size)
-{
-	return ((size - 1) >> PAGE_SHIFT) + 1;
-}
-
-static unsigned long __alloc_dma_pages(unsigned int pages)
-{
-	unsigned long ret = 0, flags;
-	unsigned long start;
-
-	if (dma_initialized == 0)
-		dma_alloc_init(_ramend - DMA_UNCACHED_REGION, _ramend);
-
-	spin_lock_irqsave(&dma_page_lock, flags);
-
-	start = bitmap_find_next_zero_area(dma_page, dma_pages, 0, pages, 0);
-	if (start < dma_pages) {
-		ret = dma_base + (start << PAGE_SHIFT);
-		bitmap_set(dma_page, start, pages);
-	}
-	spin_unlock_irqrestore(&dma_page_lock, flags);
-	return ret;
-}
-
-static void __free_dma_pages(unsigned long addr, unsigned int pages)
-{
-	unsigned long page = (addr - dma_base) >> PAGE_SHIFT;
-	unsigned long flags;
-
-	if ((page + pages) > dma_pages) {
-		printk(KERN_ERR "%s: freeing outside range.\n", __func__);
-		BUG();
-	}
-
-	spin_lock_irqsave(&dma_page_lock, flags);
-	bitmap_clear(dma_page, page, pages);
-	spin_unlock_irqrestore(&dma_page_lock, flags);
-}
-
-static void *bfin_dma_alloc(struct device *dev, size_t size,
-		dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
-{
-	void *ret;
-
-	ret = (void *)__alloc_dma_pages(get_pages(size));
-
-	if (ret) {
-		memset(ret, 0, size);
-		*dma_handle = virt_to_phys(ret);
-	}
-
-	return ret;
-}
-
-static void bfin_dma_free(struct device *dev, size_t size, void *vaddr,
-		  dma_addr_t dma_handle, unsigned long attrs)
-{
-	__free_dma_pages((unsigned long)vaddr, get_pages(size));
-}
-
-/*
- * Streaming DMA mappings
- */
-void __dma_sync(dma_addr_t addr, size_t size,
-		enum dma_data_direction dir)
-{
-	__dma_sync_inline(addr, size, dir);
-}
-EXPORT_SYMBOL(__dma_sync);
-
-static int bfin_dma_map_sg(struct device *dev, struct scatterlist *sg_list,
-		int nents, enum dma_data_direction direction,
-		unsigned long attrs)
-{
-	struct scatterlist *sg;
-	int i;
-
-	for_each_sg(sg_list, sg, nents, i) {
-		sg->dma_address = (dma_addr_t) sg_virt(sg);
-
-		if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
-			continue;
-
-		__dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction);
-	}
-
-	return nents;
-}
-
-static void bfin_dma_sync_sg_for_device(struct device *dev,
-		struct scatterlist *sg_list, int nelems,
-		enum dma_data_direction direction)
-{
-	struct scatterlist *sg;
-	int i;
-
-	for_each_sg(sg_list, sg, nelems, i) {
-		sg->dma_address = (dma_addr_t) sg_virt(sg);
-		__dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction);
-	}
-}
-
-static dma_addr_t bfin_dma_map_page(struct device *dev, struct page *page,
-		unsigned long offset, size_t size, enum dma_data_direction dir,
-		unsigned long attrs)
-{
-	dma_addr_t handle = (dma_addr_t)(page_address(page) + offset);
-
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
-		_dma_sync(handle, size, dir);
-
-	return handle;
-}
-
-static inline void bfin_dma_sync_single_for_device(struct device *dev,
-		dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-	_dma_sync(handle, size, dir);
-}
-
-const struct dma_map_ops bfin_dma_ops = {
-	.alloc			= bfin_dma_alloc,
-	.free			= bfin_dma_free,
-
-	.map_page		= bfin_dma_map_page,
-	.map_sg			= bfin_dma_map_sg,
-
-	.sync_single_for_device	= bfin_dma_sync_single_for_device,
-	.sync_sg_for_device	= bfin_dma_sync_sg_for_device,
-};
-EXPORT_SYMBOL(bfin_dma_ops);