atmel-mci: change use of dma slave interface
Allow the use of another DMA controller driver in atmel-mci sd/mmc driver.
This adds a generic dma_slave pointer to the mci platform structure where
we can store DMA controller information. In atmel-mci we use information
provided by this structure to initialize the driver (with new helper
functions that are architecture dependant).
This also adds at32/avr32 chip modifications to cope with this new access
method.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index eb9d4dc..b40ff39 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -15,6 +15,8 @@
#include <linux/gpio.h>
#include <linux/spi/spi.h>
#include <linux/usb/atmel_usba_udc.h>
+
+#include <mach/atmel-mci.h>
#include <linux/atmel-mci.h>
#include <asm/io.h>
@@ -1320,7 +1322,7 @@
at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
{
struct platform_device *pdev;
- struct dw_dma_slave *dws = &data->dma_slave;
+ struct mci_dma_slave *slave;
u32 pioa_mask;
u32 piob_mask;
@@ -1339,13 +1341,17 @@
ARRAY_SIZE(atmel_mci0_resource)))
goto fail;
- dws->dma_dev = &dw_dmac0_device.dev;
- dws->reg_width = DW_DMA_SLAVE_WIDTH_32BIT;
- dws->cfg_hi = (DWC_CFGH_SRC_PER(0)
+ slave = kzalloc(sizeof(struct mci_dma_slave), GFP_KERNEL);
+
+ slave->sdata.dma_dev = &dw_dmac0_device.dev;
+ slave->sdata.reg_width = DW_DMA_SLAVE_WIDTH_32BIT;
+ slave->sdata.cfg_hi = (DWC_CFGH_SRC_PER(0)
| DWC_CFGH_DST_PER(1));
- dws->cfg_lo &= ~(DWC_CFGL_HS_DST_POL
+ slave->sdata.cfg_lo &= ~(DWC_CFGL_HS_DST_POL
| DWC_CFGL_HS_SRC_POL);
+ data->dma_slave = slave;
+
if (platform_device_add_data(pdev, data,
sizeof(struct mci_platform_data)))
goto fail;
@@ -1411,6 +1417,8 @@
return pdev;
fail:
+ data->dma_slave = NULL;
+ kfree(slave);
platform_device_put(pdev);
return NULL;
}