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-rw-r--r--src/soc/imgtec/pistachio/ddr2_init.c170
1 files changed, 15 insertions, 155 deletions
diff --git a/src/soc/imgtec/pistachio/ddr2_init.c b/src/soc/imgtec/pistachio/ddr2_init.c
index 0ffa2bc21f..e236c1c5e5 100644
--- a/src/soc/imgtec/pistachio/ddr2_init.c
+++ b/src/soc/imgtec/pistachio/ddr2_init.c
@@ -120,7 +120,6 @@
#define DDRPHY_DLLGCR_OFFSET (0x0010)
#define BL8 1
-#define UMCTL_INIT 0
#define DDR_TIMEOUT_VALUE_US 100000
@@ -143,9 +142,6 @@ static int wait_for_completion(u32 reg, u32 exp_val)
int init_ddr2(void)
{
- u32 exp_val;
- u32 mr, md_dllrst, emr, emr2, emr3;
-
/*
* Reset the AXI bridge and DDR Controller in case any spurious
* writes have already happened to DDR - note must be done together,
@@ -153,17 +149,14 @@ int init_ddr2(void)
*/
write32(TOPLEVEL_REGS + DDR_CTRL_OFFSET, 0x00000000);
write32(TOPLEVEL_REGS + DDR_CTRL_OFFSET, 0x0000000F);
-
/*
* Dummy read to fence the access between the reset above
* and thw DDR controller writes below
*/
read32(TOPLEVEL_REGS + DDR_CTRL_OFFSET);
-
/* Timings for 400MHz
* therefore 200MHz (5ns) uMCTL (Internal) Rate
*/
-
/* TOGCNT1U: Toggle Counter 1U Register: 1us 200h C8h */
write32(DDR_PCTL + DDR_PCTL_TOGCNT1U_OFFSET, 0x000000C8);
/* TINIT: t_init Timing Register: at least 200us 200h C8h */
@@ -221,9 +214,8 @@ int init_ddr2(void)
* 31 TPD LPDDR2 0
*/
write32(DDR_PHY + DDRPHY_DCR_OFFSET, 0x0000000A);
- /* Generate to use with PHY and PCTL */
- md_dllrst = 0x0B62 | (BL8 ? 0x1 : 0x0);
/* Generate to use with PHY and PCTL
+ * MR0 : MR Register, bits 12:0 imported dfrom MR
* 2:0 BL 8 011
* 3 BT Sequential 0 Interleaved 1 = 0
* 6:4 CL 6
@@ -231,46 +223,34 @@ int init_ddr2(void)
* 8 DLL Reset 1 (self Clearing)
* 11:9 WR 15 ns 6 (101)
* 12 PD Slow 1 Fast 0 0
- */
- mr = 0x0A62 | (BL8 ? 0x1 : 0x0);
- /* MR0 : MR Register, bits 12:0 imported dfrom MR
- * 12:0 md_dllrst
- * c15:13 RSVD RSVD
+ * 15:13 RSVD RSVD
* 31:16 Reserved
*/
- write32(DDR_PHY + DDRPHY_MR_OFFSET, 0x00000000 | mr);
- /* Generate to use with PHY and PCTL
+ write32(DDR_PHY + DDRPHY_MR_OFFSET, 0x00000A62 | (BL8 ? 0x1 : 0x0));
+ /* MR1 : EMR Register
+ * Generate to use with PHY and PCTL
* 0 DE DLL Enable 0 Disable 1
* 1 DIC Output Driver Imp Ctl 0 Full, 1 Half
- * 6,2 ODT 0 Disable, 1 75R, 2 150R, 3 50R = 1
+ * 6,2 ODT 0 Disable, 1 75R, 2 150R, 3 50R; LSB: 2, MSB: 6
* 5:3 AL = 0
* 9:7 OCD = 0
* 10 DQS 0 diff, 1 single = 0
* 11 RDQS NA 0
* 12 QOFF Normal mode 0
- */
- emr = 0x4;
- /* MR1 : EMR Register
- * 12:0 EMR1
* 15:13 RSVD
* 31:16 Reserved
*/
- write32(DDR_PHY + DDRPHY_EMR_OFFSET, 0x00000000 | emr);
-
- /* Generate to use with PHY and PCTL
+ write32(DDR_PHY + DDRPHY_EMR_OFFSET, 0x00000004);
+ /* MR2 : EMR2 Register
+ * Generate to use with PHY and PCTL
* 2:0 PASR, NA 000
* 3 DDC NA 0
* 6:4 RSVD
* 7 SFR 0
- */
- emr2 = 0x0;
- /* MR2 : EMR2 Register
- * 7:0 EMR2
* 15:8 RSVD
* 31:16 Reserved
*/
- write32(DDR_PHY + DDRPHY_EMR2_OFFSET, 0x00000000 | emr2);
- emr3 = 0x0;
+ write32(DDR_PHY + DDRPHY_EMR2_OFFSET, 0x00000000);
/* DSGCR
* 0 PUREN Def 1
* 1 BDISEN Def 1
@@ -339,51 +319,24 @@ int init_ddr2(void)
* 29:19 : tDINIT1 DRAM Init time 400ns 160 Dec 0xA0
*/
write32(DDR_PHY + DDRPHY_PTR1_OFFSET, 0x05013880);
-
/* PGSR : Wait for INIT/DLL/Z Done from Power on Reset */
if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET, 0x00000007))
return DDR_TIMEOUT;
-
- if (UMCTL_INIT == 1) {
- /* PIR : Trigger INIT/DLL/Z following soft reset of DLL & ITM */
- write32(DDR_PHY + DDRPHY_PIR_OFFSET, 0x0000001F);
-
- /* PGSR : Wait for INIT?DLL?Z Done from SOFT Reset */
- if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET,
- 0x00000007))
- return DDR_TIMEOUT;
-
- /* PIR : use uMCTL for DRAM Init */
- write32(DDR_PHY + DDRPHY_PIR_OFFSET, 0x00040001);
-
- /* PGSR : Wait for DRAM Init Done */
- if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET,
- 0x0000000F))
+ /* PIR : use PHY for DRAM Init */
+ write32(DDR_PHY + DDRPHY_PIR_OFFSET, 0x000001DF);
+ /* PGSR : Wait for DRAM Init Done */
+ if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET, 0x0000001F))
return DDR_TIMEOUT;
-
- } else {
- /* PIR : use uMCTL for DRAM Init */
- write32(DDR_PHY + DDRPHY_PIR_OFFSET, 0x000001DF);
- /* PGSR : Wait for DRAM Init Done */
-
- if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET,
- 0x0000001F))
- return DDR_TIMEOUT;
- }
-
/* DF1STAT0 : wait for DFI_INIT_COMPLETE */
if (wait_for_completion(DDR_PCTL + DDR_PCTL_DFISTAT0_OFFSET,
0x00000001))
return DDR_TIMEOUT;
-
/* POWCTL : Start the memory Power Up seq*/
write32(DDR_PCTL + DDR_PCTL_POWCTL_OFFSET, 0x00000001);
-
/* POWSTAT : wait for POWER_UP_DONE */
if (wait_for_completion(DDR_PCTL + DDR_PCTL_POWSTAT_OFFSET,
0x00000001))
return DDR_TIMEOUT;
-
/*
* TREFI : t_refi Timing Register 1X
* 12:0 t_refi 7.8us in 100ns 0x4E
@@ -499,18 +452,14 @@ int init_ddr2(void)
* 30:24 Reserved
*/
write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x80100001);
-
/* MRS cmd wait for completion */
if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x00100001))
return DDR_TIMEOUT;
-
/* SCTL : UPCTL switch INIT CONFIG State */
write32(DDR_PCTL + DDR_PCTL_SCTL_OFFSET, 0x00000001);
-
/* STAT : Wait for Switch INIT to Config State */
if (wait_for_completion(DDR_PCTL + DDR_PCTL_STAT_OFFSET, 0x00000001))
return DDR_TIMEOUT;
-
/* DFISTCFG0 : Drive various DFI signals appropriately
* 0 dfi_init_start 0
* 1 dfi_freq_ratio_en 1
@@ -549,7 +498,6 @@ int init_ddr2(void)
* 3 rank0_odt_write_sel 1
*/
write32(DDR_PCTL + DDR_PCTL_DFIODTCFG_OFFSET, 0x00000008);
-
/* DFIODTCFG1 : DFI ODT Configuration
* 4:0 odt_lat_w 4
* 12:8 odt_lat_r 0 Def
@@ -557,92 +505,6 @@ int init_ddr2(void)
* 12:8 odt_len_bl8_r 6 Def
*/
write32(DDR_PCTL + DDR_PCTL_DFIODTCFG1_OFFSET, 0x06060004);
-
- if (UMCTL_INIT == 1) {
- /* MCMD : Deselect command */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x80100000);
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x00100000))
- return DDR_TIMEOUT;
-
- /* MCMD : Precharge ALL Banks */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x80100001);
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x00100001))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS Cmd, EMR2 -- High Temp Self refresh Disable */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80140003 | (emr2 << 4));
- exp_val = (0x00140003 | (emr2 << 4));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- exp_val))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS cmd, EMR3 */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80160003 | (emr3 << 4));
- exp_val = (0x00160003 | (emr3 << 4));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- exp_val))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS Cmd, EMR-- DLL Enable */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80120003 | (emr << 4));
- exp_val = (0x00120003 | (emr << 4));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- exp_val))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS Cmd, MR--DLL Reset */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- (0x80100003 | (md_dllrst << 4)));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80000000))
- return DDR_TIMEOUT;
-
- /* MCMD : Precharge ALL Banks */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x80100001);
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x00100001))
- return DDR_TIMEOUT;
-
- /* MCMD : Refresh Command */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x80100002);
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x00100002))
- return DDR_TIMEOUT;
-
- /* MCMD : Refresh Command */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x80100002);
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x00100002))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS Cmd, MR0-- Initialize Device Operation */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80100003 | (mr << 4));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET, 0x0))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS Cmd, MR1-- Set OCD Calibration Default */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80123803 | (emr << 4));
- exp_val = (0x00123803 | (emr << 4));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- exp_val))
- return DDR_TIMEOUT;
-
- /* MCMD : MRS Cmd, MR1-- Exit OCD calibration Mode */
- write32(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- 0x80120003 | (emr << 4));
- exp_val = (0x00120003 | (emr << 4));
- if (wait_for_completion(DDR_PCTL + DDR_PCTL_MCMD_OFFSET,
- exp_val))
- return DDR_TIMEOUT;
- }
-
/* DCFG : DRAM Density 256 Mb 16 Bit IO Width
* 1:0 Devicw Width 1 x8, 2 x16, 3 x32 2
* 5:2 Density 2Gb = 5
@@ -652,13 +514,11 @@ int init_ddr2(void)
* 31:11 Reserved
*/
write32(DDR_PCTL + DDR_PCTL_DCFG_OFFSET, 0x00000016);
-
/* PCFG_0 : Port 0 AXI config */
- if (BL8 == 1)
+ if (BL8)
write32(DDR_PCTL + DDR_PCTL_PCFG0_OFFSET, 0x000800A0);
else
write32(DDR_PCTL + DDR_PCTL_PCFG0_OFFSET, 0x000400A0);
-
/* SCTL : UPCTL switch Config to ACCESS State */
write32(DDR_PCTL + DDR_PCTL_SCTL_OFFSET, 0x00000002);
/* STAT : Wait for switch CFG -> GO State */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 01:44:21 +0000