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authorErik van Luijk <evanluijk@interact.nl>2015-08-13 13:43:18 (GMT)
committerAndreas Bießmann <andreas.devel@googlemail.com>2015-08-21 13:47:02 (GMT)
commit0c01c3e876c0db59b4075a4a7550020f0ea25981 (patch)
tree2cfb8af2d6351192ee05826fd1b98870a0f0a023 /arch/arm
parent8d77576371381ade83de475bb639949b44941e8c (diff)
downloadu-boot-0c01c3e876c0db59b4075a4a7550020f0ea25981.tar.xz
arm: at91: mpddr: allow multiple DDR controllers
The mpddr.c depends on ATMEL_BASE_MPDDRC for the base address to configure the controller. This cannot be used when there is more than one controller (i.e. AT91SAM9G45, AT91SAM9M10). Signed-off-by: Erik van Luijk <evanluijk@interact.nl> [remove 'new blank line at EOF'] Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-at91/include/mach/atmel_mpddrc.h6
-rw-r--r--arch/arm/mach-at91/mpddrc.c41
2 files changed, 26 insertions, 21 deletions
diff --git a/arch/arm/mach-at91/include/mach/atmel_mpddrc.h b/arch/arm/mach-at91/include/mach/atmel_mpddrc.h
index 130a85a..c6c8dda 100644
--- a/arch/arm/mach-at91/include/mach/atmel_mpddrc.h
+++ b/arch/arm/mach-at91/include/mach/atmel_mpddrc.h
@@ -23,8 +23,10 @@ struct atmel_mpddr {
u32 md;
};
-int ddr2_init(const unsigned int ram_address,
- const struct atmel_mpddr *mpddr);
+
+int ddr2_init(const unsigned int base,
+ const unsigned int ram_address,
+ const struct atmel_mpddr *mpddr);
/* Bit field in mode register */
#define ATMEL_MPDDRC_MR_MODE_NORMAL_CMD 0x0
diff --git a/arch/arm/mach-at91/mpddrc.c b/arch/arm/mach-at91/mpddrc.c
index e2b6a49..47e6e5a 100644
--- a/arch/arm/mach-at91/mpddrc.c
+++ b/arch/arm/mach-at91/mpddrc.c
@@ -9,10 +9,10 @@
#include <asm/io.h>
#include <asm/arch/atmel_mpddrc.h>
-static inline void atmel_mpddr_op(int mode, u32 ram_address)
+static inline void atmel_mpddr_op(const struct atmel_mpddr *mpddr,
+ int mode,
+ u32 ram_address)
{
- struct atmel_mpddr *mpddr = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
-
writel(mode, &mpddr->mr);
writel(0, ram_address);
}
@@ -27,10 +27,13 @@ static int ddr2_decodtype_is_seq(u32 cr)
return 1;
}
-int ddr2_init(const unsigned int ram_address,
+
+int ddr2_init(const unsigned int base,
+ const unsigned int ram_address,
const struct atmel_mpddr *mpddr_value)
{
- struct atmel_mpddr *mpddr = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
+ const struct atmel_mpddr *mpddr = (struct atmel_mpddr *)base;
+
u32 ba_off, cr;
/* Compute bank offset according to NC in configuration register */
@@ -52,30 +55,30 @@ int ddr2_init(const unsigned int ram_address,
writel(mpddr_value->tpr2, &mpddr->tpr2);
/* Issue a NOP command */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_NOP_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_NOP_CMD, ram_address);
/* A 200 us is provided to precede any signal toggle */
udelay(200);
/* Issue a NOP command */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_NOP_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_NOP_CMD, ram_address);
/* Issue an all banks precharge command */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_PRCGALL_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_PRCGALL_CMD, ram_address);
/* Issue an extended mode register set(EMRS2) to choose operation */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
ram_address + (0x2 << ba_off));
/* Issue an extended mode register set(EMRS3) to set EMSR to 0 */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
ram_address + (0x3 << ba_off));
/*
* Issue an extended mode register set(EMRS1) to enable DLL and
* program D.I.C (output driver impedance control)
*/
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
ram_address + (0x1 << ba_off));
/* Enable DLL reset */
@@ -83,21 +86,21 @@ int ddr2_init(const unsigned int ram_address,
writel(cr | ATMEL_MPDDRC_CR_DLL_RESET_ENABLED, &mpddr->cr);
/* A mode register set(MRS) cycle is issued to reset DLL */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_LMR_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_LMR_CMD, ram_address);
/* Issue an all banks precharge command */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_PRCGALL_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_PRCGALL_CMD, ram_address);
/* Two auto-refresh (CBR) cycles are provided */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_RFSH_CMD, ram_address);
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_RFSH_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_RFSH_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_RFSH_CMD, ram_address);
/* Disable DLL reset */
cr = readl(&mpddr->cr);
writel(cr & (~ATMEL_MPDDRC_CR_DLL_RESET_ENABLED), &mpddr->cr);
/* A mode register set (MRS) cycle is issued to disable DLL reset */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_LMR_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_LMR_CMD, ram_address);
/* Set OCD calibration in default state */
cr = readl(&mpddr->cr);
@@ -107,7 +110,7 @@ int ddr2_init(const unsigned int ram_address,
* An extended mode register set (EMRS1) cycle is issued
* to OCD default value
*/
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
ram_address + (0x1 << ba_off));
/* OCD calibration mode exit */
@@ -118,11 +121,11 @@ int ddr2_init(const unsigned int ram_address,
* An extended mode register set (EMRS1) cycle is issued
* to enable OCD exit
*/
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD,
ram_address + (0x1 << ba_off));
/* A nornal mode command is provided */
- atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_NORMAL_CMD, ram_address);
+ atmel_mpddr_op(mpddr, ATMEL_MPDDRC_MR_MODE_NORMAL_CMD, ram_address);
/* Perform a write access to any DDR2-SDRAM address */
writel(0, ram_address);