From e4c742e6c60350fe3e89933b271fde190630cc8d Mon Sep 17 00:00:00 2001
From: yangkai <yangkai@ubuntu-fs>
Date: Wed, 11 May 2011 15:31:23 +0800
Subject: [PATCH] ddr v2.02, enable DFTCMP and modify dqs gating window after
 data training

---
 arch/arm/mach-rk29/ddr.c | 49 ++++++++++++++++++++++++++++++++--------
 1 file changed, 39 insertions(+), 10 deletions(-)

diff --git a/arch/arm/mach-rk29/ddr.c b/arch/arm/mach-rk29/ddr.c
index 467565e2e30f..334b04897a68 100755
--- a/arch/arm/mach-rk29/ddr.c
+++ b/arch/arm/mach-rk29/ddr.c
@@ -7,6 +7,11 @@
  * Author: 
  * hcy@rock-chips.com
  * yk@rock-chips.com
+ * v2.02 
+ * enable DFTCMP, 
+ * add 90-degree phase to dqs gating window
+ * dpll use high-band if frequence between 150 and 500;
+
  * v2.01 
  * disable DFTCMP
  */
@@ -1019,22 +1024,17 @@ static uint32_t __sramlocalfunc ddr_set_pll(uint32_t nMHz, uint32_t set)
             clkr = 2;
             clkod = 2;
         }
-        else if (nMHz <= 300)
+        else if(nMHz <= 500)
         {
             clkr = 2;
             clkod = 1;
         }
-        else if(nMHz <= 600)
-        {
-            clkr = 2;
-            clkod = 0;
-        }
         else
         {
             clkr = 2;
             clkod = 0;
-            pllband = (0x01u<<16);
         }
+            pllband = (0x01u<<16);
         temp = nMHz*clkr*(1<<clkod);
         clkf = temp/24;
         //if(temp%24)
@@ -1120,7 +1120,7 @@ void __sramlocalfunc ddr_selfrefresh_exit(void)
     ddr_update_mr();
     delayus(1);
 
-//refresh:
+refresh:
     pDDR_Reg->CSR = 0x0;
     pDDR_Reg->DRR |= RD;
     delayus(1);
@@ -1131,6 +1131,35 @@ void __sramlocalfunc ddr_selfrefresh_exit(void)
     {
         delayus(1);
     }while(pGRF_Reg->GRF_MEM_STATUS[2] & 0x1);  //wait init ok
+    
+    if(pDDR_Reg->CSR & 0x100000)
+    {
+        pDDR_Reg->CSR &= ~0x100000;
+        goto refresh;
+    }
+    {        unsigned int bl0,bl1,bl2,bl3;
+        bl0 =(((pDDR_Reg->RSLR[0]>>0)&0x7) <<2) +((pDDR_Reg->RDGR[0]>>0) &3);
+        bl1 =(((pDDR_Reg->RSLR[0]>>3)&0x7) <<2) +((pDDR_Reg->RDGR[0]>>2) &3);
+        bl2 =(((pDDR_Reg->RSLR[0]>>6)&0x7) <<2) +((pDDR_Reg->RDGR[0]>>4) &3);
+        bl3 =(((pDDR_Reg->RSLR[0]>>9)&0x7) <<2) +((pDDR_Reg->RDGR[0]>>6) &3);
+        if((bl0==bl1) &&(bl1==bl2) &&(bl2==bl3))
+            bl0 =bl0+1;
+        else
+        {
+            if(bl0<bl1)
+                bl0 =bl1;
+            if(bl0<bl2)
+                bl0 =bl2;
+            if(bl0<bl3)
+                bl0 =bl3;
+         }
+         bl1 =bl0 &3;
+         bl1 =bl1 *0x55;
+         bl0 =bl0 >>2;
+         bl0 =bl0 *0x249;
+         (pDDR_Reg->RDGR[0] =bl1);
+         (pDDR_Reg->RSLR[0] =bl0);
+    }
     pDDR_Reg->DRR = TRFC(tRFC) | TRFPRD(tRFPRD) | RFBURST(8);
     delayus(10);
     pDDR_Reg->DRR = TRFC(tRFC) | TRFPRD(tRFPRD) | RFBURST(1);
@@ -1379,7 +1408,7 @@ int ddr_init(uint32_t dram_type, uint32_t freq)
     uint32_t          bank = 0;
     uint32_t          n;
 
-    ddr_print("version 2.01 20110504 \n");
+    ddr_print("version 2.02 20110511 \n");
 
     mem_type = (pDDR_Reg->DCR & 0x3);
     ddr_type = dram_type;//DDR3_TYPE;//
@@ -1445,7 +1474,7 @@ int ddr_init(uint32_t dram_type, uint32_t freq)
             break;
     }
     pDDR_Reg->DTAR = value;
-    pDDR_Reg->CCR  &= ~(DFTCMP);
+//    pDDR_Reg->CCR  &= ~(DFTCMP);
     //pDDR_Reg->CCR |= DQSCFG;// passive windowing mode
 
     if((mem_type == DDRII) || (mem_type == DDR3))
-- 
2.34.1