/******************************************************************************
* Routine: dram_init
* Description: sets uboots idea of sdram size
*****************************************************************************/
int dram_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
unsigned int size0 = 0, size1 = 0;
/*
* If a second bank of DDR is attached to CS1 this is
* where it can be started. Early init code will init
* memory on CS0.
*/
if ((sysinfo.mtype == DDR_COMBO) || (sysinfo.mtype == DDR_STACKED)) {
do_sdrc_init(CS1, NOT_EARLY);
make_cs1_contiguous();
}
size0 = get_sdr_cs_size(CS0);
size1 = get_sdr_cs_size(CS1);
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = size0;
gd->bd->bi_dram[1].start = PHYS_SDRAM_1 + get_sdr_cs_offset(CS1);
gd->bd->bi_dram[1].size = size1;
return 0;
}
/**********************************************
* Routine: dram_init
* Description: sets uboots idea of sdram size
**********************************************/
int dram_init(void)
{
#define NOT_EARLY 0
//20101215_Peter ++
//#define DEBUG
#if defined (CONFIG_EPXX_DDR_512MB)
#define EARLY_INIT 1
#endif
//20101215_Peter --
DECLARE_GLOBAL_DATA_PTR;
unsigned int size0 = 0, size1 = 0;
u32 mtype, btype;
btype = get_board_type();
mtype = get_mem_type();
#ifndef CONFIG_3430ZEBU
/* fixme... dont know why this func is crashing in ZeBu */
display_board_info(btype);
#endif
/* If a second bank of DDR is attached to CS1 this is
* where it can be started. Early init code will init
* memory on CS0.
*/
if ((mtype == DDR_COMBO) || (mtype == DDR_STACKED)) {
//20101215_Peter ++
#if defined (CONFIG_EPXX_DDR_512MB)
do_sdrc_init(SDRC_CS1_OSET, EARLY_INIT);
make_cs1_contiguous();
#else
do_sdrc_init(SDRC_CS1_OSET, NOT_EARLY);
#endif
//20101215_Peter --
}
#ifdef DEBUG
{
unsigned int reg = 0;
reg = __raw_readl(SDRC_MCFG_0);
printf("SDRC_MCFG_0: %08x\n", reg);
reg = __raw_readl(SDRC_MCFG_1);
printf("SDRC_MCFG_1: %08x\n", reg);
reg = __raw_readl(SDRC_ACTIM_CTRLA_0);
__raw_writel(reg, SDRC_ACTIM_CTRLA_1);
printf("SDRC_ACTIM_CTRLA_0: %08x\n", reg);
reg = __raw_readl(SDRC_ACTIM_CTRLB_0);
__raw_writel(reg, SDRC_ACTIM_CTRLB_1);
printf("SDRC_ACTIM_CTRLB_0: %08x\n", reg);
reg = __raw_readl(SDRC_ACTIM_CTRLA_1);
printf("SDRC_ACTIM_CTRLA_1: %08x\n", reg);
reg = __raw_readl(SDRC_ACTIM_CTRLB_1);
printf("SDRC_ACTIM_CTRLB_1: %08x\n", reg);
reg = __raw_readl(SDRC_MANUAL_0);
printf("SDRC_MANUAL_0: %08x\n", reg);
reg = __raw_readl(SDRC_MANUAL_1);
printf("SDRC_MANUAL_1: %08x\n", reg);
reg = __raw_readl(SDRC_MR_0);
printf("SDRC_MR_0: %08x\n", reg);
reg = __raw_readl(SDRC_MR_1);
printf("SDRC_MR_1: %08x\n", reg);
reg = __raw_readl(SDRC_RFR_CTRL_0);
__raw_writel(reg, SDRC_RFR_CTRL_1);
printf("SDRC_RFR_CTRL_0: %08x\n", reg);
reg = __raw_readl(SDRC_RFR_CTRL_1);
printf("SDRC_RFR_CTRL_1: %08x\n", reg);
reg = __raw_readl(CONTROL_PROG_IO0);
printf("CONTROL_PROG_IO0: %08x\n", reg);
reg = __raw_readl(CONTROL_PROG_IO1);
printf("CONTROL_PROG_IO1: %08x\n", reg);
reg = __raw_readl(SDRC_DLLA_CTRL);
printf("SDRC_DLLA_CTRL: %08x\n", reg);
}
#endif
size0 = get_sdr_cs_size(SDRC_CS0_OSET);
size1 = get_sdr_cs_size(SDRC_CS1_OSET);
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = size0;
gd->bd->bi_dram[1].start = PHYS_SDRAM_1+size0;
gd->bd->bi_dram[1].size = size1;
return 0;
}
/*************************************************************************
* do_sdrc_init(): initialize the SDRAM for use.
* -called from low level code with stack only.
* -code sets up SDRAM timing and muxing for 2422 or 2420.
* -optimal settings can be placed here, or redone after i2c
* inspection of board info
*
* This is a bit ugly, but should handle all memory moduels
* used with the H4. The first time though this code from s_init()
* we configure the first chip select. Later on we come back and
* will configure the 2nd chip select if it exists.
*
**************************************************************************/
void do_sdrc_init(u32 offset, u32 early)
{
u32 cpu, dllen=0, rev, common=0, cs0=0, pmask=0, pass_type, mtype;
sdrc_data_t *sdata; /* do not change type */
u32 a, b, r;
static const sdrc_data_t sdrc_2422 =
{
H4_2422_SDRC_SHARING, H4_2422_SDRC_MDCFG_0_DDR, 0 , H4_2422_SDRC_ACTIM_CTRLA_0,
H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL, H4_2422_SDRC_MR_0_DDR,
0, H4_2422_SDRC_DLLAB_CTRL
};
static const sdrc_data_t sdrc_2420 =
{
H4_2420_SDRC_SHARING, H4_2420_SDRC_MDCFG_0_DDR, H4_2420_SDRC_MDCFG_0_SDR,
H4_2420_SDRC_ACTIM_CTRLA_0, H4_2420_SDRC_ACTIM_CTRLB_0,
H4_2420_SDRC_RFR_CTRL, H4_2420_SDRC_MR_0_DDR, H4_2420_SDRC_MR_0_SDR,
H4_2420_SDRC_DLLAB_CTRL
};
if (offset == SDRC_CS0_OSET)
cs0 = common = 1; /* int regs shared between both chip select */
cpu = get_cpu_type();
rev = get_cpu_rev();
/* warning generated, though code generation is correct. this may bite later,
* but is ok for now. there is only so much C code you can do on stack only
* operation.
*/
if (cpu == CPU_2422){
sdata = (sdrc_data_t *)&sdrc_2422;
pass_type = STACKED;
} else{
sdata = (sdrc_data_t *)&sdrc_2420;
pass_type = IP_DDR;
}
__asm__ __volatile__("": : :"memory"); /* limit compiler scope */
/* u-boot is compiled to run in DDR or SRAM at 8xxxxxxx or 4xxxxxxx.
* If we are running in flash prior to relocation and we use data
* here which is not pc relative we need to get the address correct.
* We need to find the current flash mapping to dress up the initial
* pointer load. As long as this is const data we should be ok.
*/
if((early) && running_in_flash()){
sdata = (sdrc_data_t *)(((u32)sdata & 0x0003FFFF) | get_gpmc0_base());
/* NOR internal boot offset is 0x4000 from xloader signature */
if(running_from_internal_boot())
sdata = (sdrc_data_t *)((u32)sdata + 0x4000);
}
if (!early && (((mtype = get_mem_type()) == DDR_COMBO)||(mtype == DDR_STACKED))) {
if(mtype == DDR_COMBO){
pmask = BIT2;/* combo part has a shared CKE signal, can't use feature */
pass_type = COMBO_DDR; /* CS1 config */
__raw_writel((__raw_readl(SDRC_POWER)) & ~pmask, SDRC_POWER);
}
if(rev != CPU_2420_2422_ES1) /* for es2 and above smooth things out */
make_cs1_contiguous();
}
next_mem_type:
if (common) { /* do a SDRC reset between types to clear regs*/
__raw_writel(SOFTRESET, SDRC_SYSCONFIG); /* reset sdrc */
wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000);/* wait till reset done set */
__raw_writel(0, SDRC_SYSCONFIG); /* clear soft reset */
__raw_writel(sdata->sdrc_sharing, SDRC_SHARING);
#ifdef POWER_SAVE
__raw_writel(__raw_readl(SMS_SYSCONFIG)|SMART_IDLE, SMS_SYSCONFIG);
__raw_writel(sdata->sdrc_sharing|SMART_IDLE, SDRC_SHARING);
__raw_writel((__raw_readl(SDRC_POWER)|BIT6), SDRC_POWER);
#endif
}
if ((pass_type == IP_DDR) || (pass_type == STACKED)) /* (IP ddr-CS0),(2422-CS0/CS1) */
__raw_writel(sdata->sdrc_mdcfg_0_ddr, SDRC_MCFG_0+offset);
else if (pass_type == COMBO_DDR){ /* (combo-CS0/CS1) */
__raw_writel(H4_2420_COMBO_MDCFG_0_DDR,SDRC_MCFG_0+offset);
} else if (pass_type == IP_SDR){ /* ip sdr-CS0 */
__raw_writel(sdata->sdrc_mdcfg_0_sdr, SDRC_MCFG_0+offset);
}
a = sdata->sdrc_actim_ctrla_0;
b = sdata->sdrc_actim_ctrlb_0;
r = sdata->sdrc_dllab_ctrl;
/* work around ES1 DDR issues */
if((pass_type != IP_SDR) && (rev == CPU_2420_2422_ES1)){
a = H4_242x_SDRC_ACTIM_CTRLA_0_ES1;
b = H4_242x_SDRC_ACTIM_CTRLB_0_ES1;
r = H4_242x_SDRC_RFR_CTRL_ES1;
}
if (cs0) {
__raw_writel(a, SDRC_ACTIM_CTRLA_0);
__raw_writel(b, SDRC_ACTIM_CTRLB_0);
} else {
__raw_writel(a, SDRC_ACTIM_CTRLA_1);
__raw_writel(b, SDRC_ACTIM_CTRLB_1);
}
__raw_writel(r, SDRC_RFR_CTRL+offset);
/* init sequence for mDDR/mSDR using manual commands (DDR is a bit different) */
__raw_writel(CMD_NOP, SDRC_MANUAL_0+offset);
sdelay(5000); /* susposed to be 100us per design spec for mddr/msdr */
__raw_writel(CMD_PRECHARGE, SDRC_MANUAL_0+offset);
__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset);
__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset);
/*
* CSx SDRC Mode Register
* Burst length = (4 - DDR) (2-SDR)
* Serial mode
* CAS latency = x
*/
if(pass_type == IP_SDR)
__raw_writel(sdata->sdrc_mr_0_sdr, SDRC_MR_0+offset);
else
__raw_writel(sdata->sdrc_mr_0_ddr, SDRC_MR_0+offset);
/* NOTE: ES1 242x _BUG_ DLL + External Bandwidth fix*/
if (rev == CPU_2420_2422_ES1){
dllen = (BIT0|BIT3); /* es1 clear both bit0 and bit3 */
__raw_writel((__raw_readl(SMS_CLASS_ARB0)|BURSTCOMPLETE_GROUP7)
,SMS_CLASS_ARB0);/* enable bust complete for lcd */
}
else
dllen = BIT0|BIT1; /* es2, clear bit0, and 1 (set phase to 72) */
/* enable & load up DLL with good value for 75MHz, and set phase to 90
* ES1 recommends 90 phase, ES2 recommends 72 phase.
*/
if (common && (pass_type != IP_SDR)) {
__raw_writel(sdata->sdrc_dllab_ctrl, SDRC_DLLA_CTRL);
__raw_writel(sdata->sdrc_dllab_ctrl & ~(BIT2|dllen), SDRC_DLLA_CTRL);
__raw_writel(sdata->sdrc_dllab_ctrl, SDRC_DLLB_CTRL);
__raw_writel(sdata->sdrc_dllab_ctrl & ~(BIT2|dllen) , SDRC_DLLB_CTRL);
}
sdelay(90000);
if(mem_ok())
return; /* STACKED, other configued type */
++pass_type; /* IPDDR->COMBODDR->IPSDR for CS0 */
goto next_mem_type;
}
