summaryrefslogtreecommitdiff
path: root/cpu/mpc512x/fixed_sdram.c
diff options
context:
space:
mode:
authorWolfgang Denk <wd@denx.de>2009-10-04 22:56:08 +0200
committerWolfgang Denk <wd@denx.de>2009-10-08 00:23:12 +0200
commitda01f53404f99db185d196867af79371725d4683 (patch)
tree0cdf0d758bb985df06aa8c9c8adb493c38ee2da5 /cpu/mpc512x/fixed_sdram.c
parentdbcc357166bed20df13450e93a501f30b197efd1 (diff)
downloadu-boot-imx-da01f53404f99db185d196867af79371725d4683.zip
u-boot-imx-da01f53404f99db185d196867af79371725d4683.tar.gz
u-boot-imx-da01f53404f99db185d196867af79371725d4683.tar.bz2
mpc512x: fix fixed_sdram() init code.
Commit 054197ba and later fixes used an array to initialize some of the MDDRC parameters; however, the use of an array turned out to be a bad idea as it was not possible to correlate structure entries to array indices in readable and reliable way. Now we use a struct instead, which makes this self-explanatory. Signed-off-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'cpu/mpc512x/fixed_sdram.c')
-rw-r--r--cpu/mpc512x/fixed_sdram.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/cpu/mpc512x/fixed_sdram.c b/cpu/mpc512x/fixed_sdram.c
index 673d61e..442b5fc 100644
--- a/cpu/mpc512x/fixed_sdram.c
+++ b/cpu/mpc512x/fixed_sdram.c
@@ -26,13 +26,13 @@
#include <asm/mpc512x.h>
/*
- * MDDRC Config Runtime Settings in order of the 4 MDDRC cfg registers
+ * MDDRC Config Runtime Settings
*/
-u32 default_mddrc_config[4] = {
- CONFIG_SYS_MDDRC_TIME_CFG0, /* time_config0 */
- CONFIG_SYS_MDDRC_TIME_CFG1, /* time_config1 */
- CONFIG_SYS_MDDRC_TIME_CFG2, /* time_config2 */
- CONFIG_SYS_MDDRC_SYS_CFG, /* sys_config */
+ddr512x_config_t default_mddrc_config = {
+ .ddr_sys_config = CONFIG_SYS_MDDRC_SYS_CFG,
+ .ddr_time_config0 = CONFIG_SYS_MDDRC_TIME_CFG0,
+ .ddr_time_config1 = CONFIG_SYS_MDDRC_TIME_CFG1,
+ .ddr_time_config2 = CONFIG_SYS_MDDRC_TIME_CFG2,
};
u32 default_init_seq[] = {
@@ -74,7 +74,8 @@ u32 default_init_seq[] = {
* The board doesn't use memory modules that have serial presence
* detect or similar mechanism for discovery of the DRAM settings
*/
-long int fixed_sdram(u32 *mddrc_config, u32 *dram_init_seq, int seq_sz)
+long int fixed_sdram(ddr512x_config_t *mddrc_config,
+ u32 *dram_init_seq, int seq_sz)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024;
@@ -83,7 +84,7 @@ long int fixed_sdram(u32 *mddrc_config, u32 *dram_init_seq, int seq_sz)
/* take default settings and init sequence if necessary */
if (mddrc_config == NULL)
- mddrc_config = default_mddrc_config;
+ mddrc_config = &default_mddrc_config;
if (dram_init_seq == NULL) {
dram_init_seq = default_init_seq;
seq_sz = sizeof(default_init_seq)/sizeof(u32);
@@ -130,18 +131,22 @@ long int fixed_sdram(u32 *mddrc_config, u32 *dram_init_seq, int seq_sz)
* put MDDRC in CMD mode and
* set the max time between refreshes to 0 during init process
*/
- out_be32(&im->mddrc.ddr_sys_config, mddrc_config[3] | MDDRC_SYS_CFG_CMD_MASK);
- out_be32(&im->mddrc.ddr_time_config0, mddrc_config[0] & MDDRC_REFRESH_ZERO_MASK);
- out_be32(&im->mddrc.ddr_time_config1, mddrc_config[1]);
- out_be32(&im->mddrc.ddr_time_config2, mddrc_config[2]);
+ out_be32(&im->mddrc.ddr_sys_config,
+ mddrc_config->ddr_sys_config | MDDRC_SYS_CFG_CMD_MASK);
+ out_be32(&im->mddrc.ddr_time_config0,
+ mddrc_config->ddr_time_config0 & MDDRC_REFRESH_ZERO_MASK);
+ out_be32(&im->mddrc.ddr_time_config1,
+ mddrc_config->ddr_time_config1);
+ out_be32(&im->mddrc.ddr_time_config2,
+ mddrc_config->ddr_time_config2);
/* Initialize DDR with either default or supplied init sequence */
for (i = 0; i < seq_sz; i++)
out_be32(&im->mddrc.ddr_command, dram_init_seq[i]);
/* Start MDDRC */
- out_be32(&im->mddrc.ddr_time_config0, mddrc_config[0]);
- out_be32(&im->mddrc.ddr_sys_config, mddrc_config[3]);
+ out_be32(&im->mddrc.ddr_time_config0, mddrc_config->ddr_time_config0);
+ out_be32(&im->mddrc.ddr_sys_config, mddrc_config->ddr_sys_config);
return msize;
}