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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>
This commit is contained in:
Matt Porter 2012-10-05 13:04:40 -04:00 committed by Sekhar Nori
parent 76d57ce6ef
commit 2eb2478d47
3 changed files with 20 additions and 8 deletions
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1
drivers/uio/Kconfig
View File

@ -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

24
drivers/uio/uio_pruss.c
View File

@ -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,

3
include/linux/platform_data/uio_pruss.h
View File

@ -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_ */