[U-Boot] [PATCH 03/11] 85xx, 86xx: Break out DMA code to a common file
Peter Tyser
ptyser at xes-inc.com
Thu May 21 19:10:01 CEST 2009
DMA support is now enabled via the CONFIG_FSL_DMA define instead of the
previous CONFIG_DDR_ECC
Signed-off-by: Peter Tyser <ptyser at xes-inc.com>
---
cpu/mpc85xx/cpu.c | 47 ------------------------
cpu/mpc86xx/cpu.c | 55 ----------------------------
drivers/dma/Makefile | 1 +
drivers/dma/fsl_dma.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++
include/configs/PM854.h | 1 +
include/configs/PM856.h | 1 +
6 files changed, 95 insertions(+), 102 deletions(-)
create mode 100644 drivers/dma/fsl_dma.c
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
index 86b19a6..416ea08 100644
--- a/cpu/mpc85xx/cpu.c
+++ b/cpu/mpc85xx/cpu.c
@@ -258,53 +258,6 @@ reset_85xx_watchdog(void)
}
#endif /* CONFIG_WATCHDOG */
-#if defined(CONFIG_DDR_ECC)
-void dma_init(void) {
- volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
- volatile fsl_dma_t *dma = &dma_base->dma[0];
-
- dma->satr = 0x00040000;
- dma->datr = 0x00040000;
- dma->sr = 0xffffffff; /* clear any errors */
- asm("sync; isync; msync");
- return;
-}
-
-uint dma_check(void) {
- volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
- volatile fsl_dma_t *dma = &dma_base->dma[0];
- volatile uint status = dma->sr;
-
- /* While the channel is busy, spin */
- while((status & 4) == 4) {
- status = dma->sr;
- }
-
- /* clear MR[CS] channel start bit */
- dma->mr &= 0x00000001;
- asm("sync;isync;msync");
-
- if (status != 0) {
- printf ("DMA Error: status = %x\n", status);
- }
- return status;
-}
-
-int dma_xfer(void *dest, uint count, void *src) {
- volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
- volatile fsl_dma_t *dma = &dma_base->dma[0];
-
- dma->dar = (uint) dest;
- dma->sar = (uint) src;
- dma->bcr = count;
- dma->mr = 0xf000004;
- asm("sync;isync;msync");
- dma->mr = 0xf000005;
- asm("sync;isync;msync");
- return dma_check();
-}
-#endif
-
/*
* Configures a UPM. The function requires the respective MxMR to be set
* before calling this function. "size" is the number or entries, not a sizeof.
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
index d47cc5e..1f26ba1 100644
--- a/cpu/mpc86xx/cpu.c
+++ b/cpu/mpc86xx/cpu.c
@@ -177,61 +177,6 @@ watchdog_reset(void)
}
#endif /* CONFIG_WATCHDOG */
-
-#if defined(CONFIG_DDR_ECC)
-void
-dma_init(void)
-{
- volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
- volatile fsl_dma_t *dma = &dma_base->dma[0];
-
- dma->satr = 0x00040000;
- dma->datr = 0x00040000;
- dma->sr = 0xffffffff; /* clear any errors */
- asm("sync; isync");
-}
-
-uint
-dma_check(void)
-{
- volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
- volatile fsl_dma_t *dma = &dma_base->dma[0];
- volatile uint status = dma->sr;
-
- /* While the channel is busy, spin */
- while ((status & 4) == 4) {
- status = dma->sr;
- }
-
- /* clear MR[CS] channel start bit */
- dma->mr &= 0x00000001;
- asm("sync;isync");
-
- if (status != 0) {
- printf("DMA Error: status = %x\n", status);
- }
- return status;
-}
-
-int
-dma_xfer(void *dest, uint count, void *src)
-{
- volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
- volatile fsl_dma_t *dma = &dma_base->dma[0];
-
- dma->dar = (uint) dest;
- dma->sar = (uint) src;
- dma->bcr = count;
- dma->mr = 0xf000004;
- asm("sync;isync");
- dma->mr = 0xf000005;
- asm("sync;isync");
- return dma_check();
-}
-
-#endif /* CONFIG_DDR_ECC */
-
-
/*
* Print out the state of various machine registers.
* Currently prints out LAWs, BR0/OR0, and BATs
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index cf29efa..36d99f9 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
LIB := $(obj)libdma.a
COBJS-$(CONFIG_FSLDMAFEC) += MCD_tasksInit.o MCD_dmaApi.o MCD_tasks.o
+COBJS-$(CONFIG_FSL_DMA) += fsl_dma.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/dma/fsl_dma.c b/drivers/dma/fsl_dma.c
new file mode 100644
index 0000000..a9989ee
--- /dev/null
+++ b/drivers/dma/fsl_dma.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
+ * (C) Copyright 2002, 2003 Motorola Inc.
+ * Xianghua Xiao (X.Xiao at motorola.com)
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <asm/fsl_dma.h>
+
+#if defined(CONFIG_MPC85xx)
+volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
+#elif defined(CONFIG_MPC86xx)
+volatile ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
+#else
+#error "Freescale DMA engine not supported on your processor"
+#endif
+
+static void dma_sync(void)
+{
+#if defined(CONFIG_MPC85xx)
+ asm("sync; isync; msync");
+#elif defined(CONFIG_MPC86xx)
+ asm("sync; isync");
+#endif
+}
+
+static uint dma_check(void) {
+ volatile fsl_dma_t *dma = &dma_base->dma[0];
+ volatile uint status = dma->sr;
+
+ /* While the channel is busy, spin */
+ while (status & 4)
+ status = dma->sr;
+
+ /* clear MR[CS] channel start bit */
+ dma->mr &= 1;
+ dma_sync();
+
+ if (status != 0)
+ printf ("DMA Error: status = %x\n", status);
+
+ return status;
+}
+
+void dma_init(void) {
+ volatile fsl_dma_t *dma = &dma_base->dma[0];
+
+ dma->satr = 0x00040000;
+ dma->datr = 0x00040000;
+ dma->sr = 0xffffffff; /* clear any errors */
+ dma_sync();
+}
+
+int dma_xfer(void *dest, uint count, void *src) {
+ volatile fsl_dma_t *dma = &dma_base->dma[0];
+
+ dma->dar = (uint) dest;
+ dma->sar = (uint) src;
+ dma->bcr = count;
+
+ /* Disable bandwidth control, use direct transfer mode */
+ dma->mr = 0xf000004;
+ dma_sync();
+
+ /* Start the transfer */
+ dma->mr = 0xf000005;
+ dma_sync();
+
+ return dma_check();
+}
diff --git a/include/configs/PM854.h b/include/configs/PM854.h
index 3f943aa..4b9bcca 100644
--- a/include/configs/PM854.h
+++ b/include/configs/PM854.h
@@ -96,6 +96,7 @@
#undef CONFIG_DDR_SPD
#define CONFIG_DDR_DLL /* possible DLL fix needed */
#define CONFIG_DDR_ECC /* only for ECC DDR module */
+#define CONFIG_FSL_DMA /* use DMA to init DDR ECC */
#define CONFIG_MEM_INIT_VALUE 0xDeadBeef
diff --git a/include/configs/PM856.h b/include/configs/PM856.h
index 43c2873..1db20bc 100644
--- a/include/configs/PM856.h
+++ b/include/configs/PM856.h
@@ -98,6 +98,7 @@
#undef CONFIG_DDR_SPD
#define CONFIG_DDR_DLL /* possible DLL fix needed */
#define CONFIG_DDR_ECC /* only for ECC DDR module */
+#define CONFIG_FSL_DMA /* use DMA to init DDR ECC */
#define CONFIG_MEM_INIT_VALUE 0xDeadBeef
--
1.6.2.1
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