u32 *dram_init_seq, int seq_sz)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
- u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024;
+ u32 msize = CONFIG_SYS_MAX_RAM_SIZE;
u32 msize_log2 = __ilog2(msize);
u32 i;
}
/* Initialize IO Control */
- out_be32(&im->io_ctrl.io_control_mem, IOCTRL_MUX_DDR);
+ out_be32(&im->io_ctrl.io_control_mem, CONFIG_SYS_IOCTRL_MUX_DDR);
/* Initialize DDR Local Window */
out_be32(&im->sysconf.ddrlaw.bar, CONFIG_SYS_DDR_BASE & 0xFFFFF000);
sync_law(&im->sysconf.ddrlaw.ar);
/* DDR Enable */
- out_be32(&im->mddrc.ddr_sys_config, MDDRC_SYS_CFG_EN);
+ /*
+ * the "enable" combination: DRAM controller out of reset,
+ * clock enabled, command mode -- BUT leave CKE low for now
+ */
+ i = MDDRC_SYS_CFG_EN & ~MDDRC_SYS_CFG_CKE_MASK;
+ out_be32(&im->mddrc.ddr_sys_config, i);
+ /* maintain 200 microseconds of stable power and clock */
+ udelay(200);
+ /* apply a NOP, it shouldn't harm */
+ out_be32(&im->mddrc.ddr_command, CONFIG_SYS_DDRCMD_NOP);
+ /* now assert CKE (high) */
+ i |= MDDRC_SYS_CFG_CKE_MASK;
+ out_be32(&im->mddrc.ddr_sys_config, i);
/* Initialize DDR Priority Manager */
out_be32(&im->mddrc.prioman_config1, CONFIG_SYS_MDDRCGRP_PM_CFG1);
out_be32(&im->mddrc.ddr_time_config0, mddrc_config->ddr_time_config0);
out_be32(&im->mddrc.ddr_sys_config, mddrc_config->ddr_sys_config);
+ /* Allow for the DLL to startup before accessing data */
+ udelay(10);
+
+ msize = get_ram_size(CONFIG_SYS_DDR_BASE, CONFIG_SYS_MAX_RAM_SIZE);
+ /* Fix DDR Local Window for new size */
+ out_be32(&im->sysconf.ddrlaw.ar, __ilog2(msize) - 1);
+ sync_law(&im->sysconf.ddrlaw.ar);
+
return msize;
}