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authorMatt Porter <mporter@ti.com>2012-10-05 21:04:40 +0400
committerSekhar Nori <nsekhar@ti.com>2012-10-27 14:58:32 +0400
commit2eb2478d471e45e1d0c8bb3defbf82bf7204e13d (patch)
tree5158b5cb3958b9f14cf89f41939da0d52242c50f
parent76d57ce6ef6060f611c14675249b7300a3c96368 (diff)
downloadlinux-2eb2478d471e45e1d0c8bb3defbf82bf7204e13d.tar.xz
uio: uio_pruss: replace private SRAM API with genalloc
Remove the use of the private DaVinci SRAM API in favor of genalloc. The pool to be used is provided by platform data. Signed-off-by: Matt Porter <mporter@ti.com> Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
-rw-r--r--drivers/uio/Kconfig1
-rw-r--r--drivers/uio/uio_pruss.c24
-rw-r--r--include/linux/platform_data/uio_pruss.h3
3 files changed, 20 insertions, 8 deletions
diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 6f3ea9bbc818..c48b93813fc1 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -97,6 +97,7 @@ config UIO_NETX
config UIO_PRUSS
tristate "Texas Instruments PRUSS driver"
depends on ARCH_DAVINCI_DA850
+ select GENERIC_ALLOCATOR
help
PRUSS driver for OMAPL138/DA850/AM18XX devices
PRUSS driver requires user space components, examples and user space
diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c
index 33a7a273b453..f8738de342be 100644
--- a/drivers/uio/uio_pruss.c
+++ b/drivers/uio/uio_pruss.c
@@ -25,7 +25,7 @@
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
-#include <mach/sram.h>
+#include <linux/genalloc.h>
#define DRV_NAME "pruss_uio"
#define DRV_VERSION "1.0"
@@ -65,10 +65,11 @@ struct uio_pruss_dev {
dma_addr_t sram_paddr;
dma_addr_t ddr_paddr;
void __iomem *prussio_vaddr;
- void *sram_vaddr;
+ unsigned long sram_vaddr;
void *ddr_vaddr;
unsigned int hostirq_start;
unsigned int pintc_base;
+ struct gen_pool *sram_pool;
};
static irqreturn_t pruss_handler(int irq, struct uio_info *info)
@@ -106,7 +107,9 @@ static void pruss_cleanup(struct platform_device *dev,
gdev->ddr_paddr);
}
if (gdev->sram_vaddr)
- sram_free(gdev->sram_vaddr, sram_pool_sz);
+ gen_pool_free(gdev->sram_pool,
+ gdev->sram_vaddr,
+ sram_pool_sz);
kfree(gdev->info);
clk_put(gdev->pruss_clk);
kfree(gdev);
@@ -152,10 +155,17 @@ static int __devinit pruss_probe(struct platform_device *dev)
goto out_free;
}
- gdev->sram_vaddr = sram_alloc(sram_pool_sz, &(gdev->sram_paddr));
- if (!gdev->sram_vaddr) {
- dev_err(&dev->dev, "Could not allocate SRAM pool\n");
- goto out_free;
+ if (pdata->sram_pool) {
+ gdev->sram_pool = pdata->sram_pool;
+ gdev->sram_vaddr =
+ gen_pool_alloc(gdev->sram_pool, sram_pool_sz);
+ if (!gdev->sram_vaddr) {
+ dev_err(&dev->dev, "Could not allocate SRAM pool\n");
+ goto out_free;
+ }
+ gdev->sram_paddr =
+ gen_pool_virt_to_phys(gdev->sram_pool,
+ gdev->sram_vaddr);
}
gdev->ddr_vaddr = dma_alloc_coherent(&dev->dev, extram_pool_sz,
diff --git a/include/linux/platform_data/uio_pruss.h b/include/linux/platform_data/uio_pruss.h
index f39140aabc6f..3d47d219827f 100644
--- a/include/linux/platform_data/uio_pruss.h
+++ b/include/linux/platform_data/uio_pruss.h
@@ -20,6 +20,7 @@
/* To configure the PRUSS INTC base offset for UIO driver */
struct uio_pruss_pdata {
- u32 pintc_base;
+ u32 pintc_base;
+ struct gen_pool *sram_pool;
};
#endif /* _UIO_PRUSS_H_ */