/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Imagination Technologies
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <soc/ddr_init.h>
#include <soc/ddr_private_reg.h>
#include <stdint.h>
#define BL8 0
/*
* Configuration for the Winbond W972GG6JB-25 part using
* Synopsys DDR uMCTL and DDR Phy
*/
int init_ddr2(void)
{
/*
* Reset the AXI bridge and DDR Controller in case any spurious
* writes have already happened to DDR - note must be done together,
* not sequentially
*/
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 */
write32(DDR_PCTL + DDR_PCTL_TINIT_OFFSET, 0x000000C8);
/* TRSTH: Reset High Time Register DDR3 ONLY */
write32(DDR_PCTL + DDR_PCTL_TRSTH_OFFSET, 0x00000000);
/* TOGCNT100N: Toggle Counter 100N Register: 20d, 14h*/
write32(DDR_PCTL + DDR_PCTL_TOGG_CNTR_100NS_OFFSET, 0x00000014);
/* DTUAWDT DTU Address Width Register
* 1:0 column_addr_width Def 10 - 7 3 10 bits
* 4:3 bank_addr_width Def 3 - 2 1 3 bits (8 bank)
* 7:6 row_addr_width Def 14 - 13 1 3 bits
* 10:9 number_ranks Def 1 - 1 0 0 1 Rank
*/
write32(DDR_PCTL + DDR_PCTL_DTUAWDT_OFFSET, 0x0000004B);
/* MCFG
* 0 BL 0 = 4 1 = 8
* 1 RDRIMM 0
* 2 BL8 Burst Terminate 0
* 3 2T = 0
* 4 Multi Rank 0
* 5 DDR3 En 0
* 6 LPDDR S4 En
* 7 BST En 0, 1 for LPDDR2/3
* 15:8 Power down Idle, passed by argument
* 16 Power Down Type, passed by argument
* 17 Power Down Exit 0 = slow, 1 = fast, pba
* 19:18 tFAW 45ns = 9 clk 5*2 -1 1h
* 21:20 mDDR/LPDDR2 BL 0
* 23:22 mDDR/LPDDR2 Enable 0
* 31:24 mDDR/LPDDR2/3 Dynamic Clock Stop 0
*/
write32(DDR_PCTL + DDR_PCTL_MCFG_OFFSET,
0x00060000 | (BL8 ? 0x1 : 0x0));
/* MCFG1: Memory Configuration-1 Register
* c7:0 sr_idle Self Refresh Idle Entery 32 * nclks 14h, set 0 for BUB
* 10:8 Fine tune MCFG.19:18 -1
* 15:11 Reserved
* 23:16 Hardware Idle Period NA 0
* 30:24 Reserved
* 31 c_active_in_pin exit auto clk stop NA 0
*/
write32(DDR_PCTL + DDR_PCTL_MCFG1_OFFSET, 0x00000100);
/* DCR DRAM Config
* 2:0 SDRAM => DDR2 2
* 3 DDR 8 Bank 1
* 6:4 Primary DQ DDR3 Only 0
* 7 Multi-Purpose Register DDR3 Only 0
* 9:8 DDRTYPE LPDDR2 00
* 26:10 Reserved
* 27 NOSRA No Simultaneous Rank Access 0
* 28 DDR 2T 0
* 29 UDIMM NA 0
* 30 RDIMM NA 0
* 31 TPD LPDDR2 0
*/
write32(DDR_PHY + DDRPHY_DCR_OFFSET, 0x0000000A);
/* 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
* 7 TM Normal 0
* 8 DLL Reset 1 (self Clearing)
* 11:9 WR 15 ns 6 (101)
* 12 PD Slow 1 Fast 0 0
* 15:13 RSVD RSVD
* 31:16 Reserved
*/
write32(DDR_PHY + DDRPHY_MR_OFFSET, 0x00000B62 | (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; 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
* 15:13 RSVD
* 31:16 Reserved
*/
write32(DDR_PHY + DDRPHY_EMR_OFFSET, 0x00000044);
/* 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
* 15:8 RSVD
* 31:16 Reserved
*/
write32(DDR_PHY + DDRPHY_EMR2_OFFSET, 0x00000000);
/* DSGCR
* 0 PUREN Def 1
* 1 BDISEN Def 1
* 2 ZUEN Def 1
* 3 LPIOPD DEf 1 0
* 4 LPDLLPD DEf 1 0
* 7:5 DQSGX DQS Extention set to 1 - advised by Synopsys
* 10:8 DQSGE DQS Early Gate - 1 - advised by Sysnopsys
* 11 NOBUB No Bubbles, adds latency 1
* 12 FXDLAT Fixed Read Latency 0
* 15:13 Reserved
* 19:16 CKEPDD CKE Power Down 0000
* 23:20 ODTPDD ODT Power Down 0000
* 24 NL2PD Power Down Non LPDDR2 pins 0
* 25 NL2OE Output Enable Non LPDDR2 pins 1
* 26 TPDPD LPDDR Only 0
* 27 TPDOE LPDDR Only 0
* 28 CKOE Output Enable Clk's 1
* 29 ODTOE Output Enable ODT 1
* 30 RSTOE RST# Output Enable 1
* 31 CKEOE CKE Output Enable 1
*/
write32(DDR_PHY + DDRPHY_DSGCR_OFFSET, 0xF2000927);
/* Sysnopsys advised 500R pullup/pulldown DQS DQSN */
write32(DDR_PHY + DDRPHY_DXCCR_OFFSET, 0x00000C40);
/* DTPR0 : DRAM Timing Params 0
* 1:0 tMRD 2
* 4:2 tRTP 3
* 7:5 tWTR 3
* 11:8 tRP 6
* 15:12 tRCD 6
* 20:16 tRAS 18
* 24:21 tRRD 4
* 30:25 tRC 24 (23)
* 31 tCCD 0 BL/2 Cas to Cas
*/
write32(DDR_PHY + DDRPHY_DTPR0_OFFSET, 0x3092666E);
/* DTPR1 : DRAM Timing Params 1
* 1:0 ODT On/Off Del Std 0
* 2 tRTW Rd2Wr Del 0 std 1 +1 0
* 8:3 tFAW 4 Bank Act 45ns = 18 18
* 10:9 tMOD DDR3 Only 0
* 11 tRTODT DDR3 Only 0
* 15:12 Reserved
* 23:16 tRFC 195ns 78 def 131 78d
* 26:24 tDQSCK LPDDR2 only 1
* 29:27 tDQSCKmax 1
* 31:30 Reserved
*/
write32(DDR_PHY + DDRPHY_DTPR1_OFFSET, 0x094E0092);
/* DTPR2 : DRAM Timing Params 2
* 9:0 tXS exit SR def 200, 200d
* 14:10 tXP PD Exit Del 8 3
* 18:15 tCKE CKE Min pulse 3
* 28:19 tDLLK DLL Lock time 200d
* 32:29 Reserved
*/
write32(DDR_PHY + DDRPHY_DTPR2_OFFSET, 0x06418CC8);
/* PTR0 : PHY Timing Params 0
* 5:0 tDLLRST Def 27
* 17:6 tDLLLOCK Def 2750
* 21:18 tITMSRST Def 8
* 31:22 Reserved 0
*/
write32(DDR_PHY + DDRPHY_PTR0_OFFSET, 0x0022AF9B);
/* PTR1 : PHY Timing Params 1
* 18:0 : tDINITO DRAM Init time 200us 80,000 Dec 0x13880
* 29:19 : tDINIT1 DRAM Init time 400ns 160 Dec 0xA0
*/
write32(DDR_PHY + DDRPHY_PTR1_OFFSET, 0x05013880);
/* DQS gating configuration: passive windowing mode */
/*
* PGCR: PHY General cofiguration register
* 0 ITM DDR mode: 0
* 1 DQS gading configuration: passive windowing 1
* 2 DQS drift compensation: not supported in passive windowing 0
* 4:3 DQS drift limit 0
* 8:5 Digital test output select 0
* 11:9 CK Enable: one bit for each 3 CK pair: 0x7
* 13:12 CK Disable values: 0x2
* 14 CK Invert 0
* 15 IO loopback 0
* 17:16 I/O DDR mode 0
* 21:18 Ranks enable by training: 0xF
* 23:22 Impedance clock divider select 0x2
* 24 Power down disable 1
* 28:25 Refresh during training 0
* 29 loopback DQS shift 0
* 30 loopback DQS gating 0
* 31 loopback mode 0
*/
write32(DDR_PHY + DDRPHY_PGCR_OFFSET, 0x01BC2E02);
/* PGSR : Wait for INIT/DLL/Z Done from Power on Reset */
if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET, 0x00000007))
return DDR_TIMEOUT;
/* 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;
/* Disable Impedance Calibration */
write32(DDR_PHY + DDRPHY_ZQ0CR0_OFFSET, 0x3000014A);
write32(DDR_PHY + DDRPHY_ZQ1CR0_OFFSET, 0x3000014A);
/* 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
* 15:13 Reserved 0
* 18:16 num_add_ref 0
* 30:19 Reserved 0
* 31 Update 1
*/
write32(DDR_PCTL + DDR_PCTL_TREFI_OFFSET, 0x8000004E);
/* TMRD : t_mrd Timing Register -- Range 2 to 3 */
write32(DDR_PCTL + DDR_PCTL_TMRD_OFFSET, 0x00000002);
/*
* TRFC : t_rfc Timing Register -- Range 15 to 131
* 195ns / 2.5ns 78 x4E
*/
write32(DDR_PCTL + DDR_PCTL_TRFC_OFFSET, 0x0000004E);
/* TRP : t_rp Timing Register -- Range 3 to 7
* 4:0 tRP 12.5 / 2.5 = 5 6 For Now 6-6-6
* 17:16 rpea_extra tRPall 8 bank 1
*/
write32(DDR_PCTL + DDR_PCTL_TRP_OFFSET, 0x00010006);
/* TAL : Additive Latency Register -- AL in MR1 */
write32(DDR_PCTL + DDR_PCTL_TAL_OFFSET, 0x00000000);
/* DFITPHYWRLAT : Write cmd to dfi_wrdata_en */
write32(DDR_PCTL + DDR_PCTL_DFIWRLAT_OFFSET, 0x00000002);
/* DFITRDDATAEN : Read cmd to dfi_rddata_en */
write32(DDR_PCTL + DDR_PCTL_DFITRDDATAEN_OFFSET, 0x00000002);
/* TCL : CAS Latency Timing Register -- CASL in MR0 6-6-6 */
write32(DDR_PCTL + DDR_PCTL_TCL_OFFSET, 0x00000006);
/* TCWL : CAS Write Latency Register --CASL-1 */
write32(DDR_PCTL + DDR_PCTL_TCWL_OFFSET, 0x00000005);
/*
* TRAS : Activate to Precharge cmd time
* Range 8 to 24: 45ns / 2.5ns = 18d
*/
write32(DDR_PCTL + DDR_PCTL_TRAS_OFFSET, 0x00000012);
/*
* TRC : Min. ROW cycle time
* Range 11 to 31: 57.5ns / 2.5ns = 23d Playing safe 24
*/
write32(DDR_PCTL + DDR_PCTL_TRC_OFFSET, 0x00000018);
/*
* TRCD : Row to Column Delay
* Range 3 to 7 (TCL = TRCD): 2.5ns / 2.5ns = 5 but running 6-6-6 6
*/
write32(DDR_PCTL + DDR_PCTL_TRCD_OFFSET, 0x00000006);
/* TRRD : Row to Row delay -- Range 2 to 6: 2K Page 10ns / 2.5ns = 4*/
write32(DDR_PCTL + DDR_PCTL_TRRD_OFFSET, 0x00000004);
/* TRTP : Read to Precharge time -- Range 2 to 4: 7.3ns / 2.5ns = 3 */
write32(DDR_PCTL + DDR_PCTL_TRTP_OFFSET, 0x00000003);
/* TWR : Write recovery time -- WR in MR0: 15ns / 2.5ns = 6
*/
write32(DDR_PCTL + DDR_PCTL_TWR_OFFSET, 0x00000006);
/*
* TWTR : Write to read turn around time
* Range 2 to 4: 7.3ns / 2.5ns = 3
*/
write32(DDR_PCTL + DDR_PCTL_TWTR_OFFSET, 0x00000003);
/* TEXSR : Exit Self Refresh to first valid cmd: tXS 200*/
write32(DDR_PCTL + DDR_PCTL_TEXSR_OFFSET, 0x000000C8);
/*
* TXP : Exit Power Down to first valid cmd
* tXP 2, Settingto 3 to match PHY
*/
write32(DDR_PCTL + DDR_PCTL_TXP_OFFSET, 0x00000003);
/*
* TDQS : t_dqs Timing Register
* DQS additional turn around Rank 2 Rank (1 Rank) Def 1
*/
write32(DDR_PCTL + DDR_PCTL_TDQS_OFFSET, 0x00000001);
/*TRTW : Read to Write turn around time Def 3
* Actual gap t_bl + t_rtw
*/
write32(DDR_PCTL + DDR_PCTL_TRTW_OFFSET, 0x00000003);
/* TCKE : CKE min pulse width DEf 3 */
write32(DDR_PCTL + DDR_PCTL_TCKE_OFFSET, 0x00000003);
/*
* TXPDLL : Slow Exit Power Down to first valid cmd delay
* tXARDS 10+AL = 10
*/
write32(DDR_PCTL + DDR_PCTL_TXPDLL_OFFSET, 0x0000000A);
/*
* TCKESR : Min CKE Low width for Self refresh entry to exit
* t_ckesr = 0 DDR2
*/
write32(DDR_PCTL + DDR_PCTL_TCKESR_OFFSET, 0x00000000);
/* SCFG : State Configuration Register (Enabling Self Refresh)
* 0 LP_en Leave Off for Bring Up 0
* 5:1 Reserved
* 6 Synopsys Internal Only 0
* 7 Enale PHY indication of LP Opportunity 1
* 11:8 bbflags_timing max UPCTL_TCU_SED_P - tRP (16 - 6) Use 4
* 16:12 Additional delay on accertion of ac_pdd 4
* 31:17 Reserved
*/
write32(DDR_PCTL + DDR_PCTL_SCFG_OFFSET, 0x00004480);
/*
* DFITPHYWRDATA : dfi_wrdata_en to drive wr data
* DFI Clks wrdata_en to wrdata Def 1
*/
write32(DDR_PCTL + DDR_PCTL_DFITPHYWRDATA_OFFSET, 0x00000000);
/*
* DFITPHYRDLAT : dfi_rddata_en to dfi_rddata_valid
* DFI clks max rddata_en to rddata_valid Def 15
*/
write32(DDR_PCTL + DDR_PCTL_DFITPHYRDLAT_OFFSET, 0x00000008);
/* MCMD : PREA, Addr 0 Bank 0 Rank 0 Del 0
* 3:0 cmd_opcode PREA 00001
* 16:4 cmd_addr 0
* 19:17 bank_addr 0
* 23:20 rank_sel 0 0001
* 27:24 cmddelay 0
* 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
* 2 dfi_data_byte_disable_en 1
*/
write32(DDR_PCTL + DDR_PCTL_DFISTCFG0_OFFSET, 0x00000003);
/* DFISTCFG1 : Enable various DFI support
* 0 dfi_dram_clk_disable_en 1
* 1 dfi_dram_clk_disable_en_pdp only lPDDR 0
*/
write32(DDR_PCTL + DDR_PCTL_DFISTCFG1_OFFSET, 0x00000001);
/* DFISTCFG2 : Enable Parity and asoc interrupt
* 0 dfi_parity_in Enable 1
* 1 Interrupt on dfi_parity_error 1
*/
write32(DDR_PCTL + DDR_PCTL_DFISTCFG2_OFFSET, 0x00000003);
/* DFILPCFG0 : DFI Low Power Interface Configuration
* 0 Enable DFI LP IF during PD 1
* 3:1 Reserved
* 7:4 DFI tlp_wakeup time 0
* 8 Enable DFI LP IF during SR 1
* 11:9 Reserved
* 15:12 dfi_lp_wakeup in SR 0
* 19:16 tlp_resp DFI 2.1 recomend 7
* 23:20 Reserved
* 24 Enable DFI LP in Deep Power Down 0
* 27:25 Reserved
* 31:28 DFI LP Deep Power Down Value 0
*/
write32(DDR_PCTL + DDR_PCTL_DFILPCFG0_OFFSET, 0x00070101);
/* DFIODTCFG : DFI ODT Configuration
* Only Enabled on Rank0 Writes
* 0 rank0_odt_read_nsel 0
* 1 rank0_odt_read_sel 0
* 2 rank0_odt_write_nsel 0
* 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
* 4:0 odt_len_bl8_w 6 Def
* 12:8 odt_len_bl8_r 6 Def
*/
write32(DDR_PCTL + DDR_PCTL_DFIODTCFG1_OFFSET, 0x06060004);
/* 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
* 6 Dram Type (MDDR/LPDDR2) Only 0
* 7 Reserved 0
* 10:8 Address Map R/B/C = 1
* 31:11 Reserved
*/
write32(DDR_PCTL + DDR_PCTL_DCFG_OFFSET, 0x00000116);
/* PCFG_0 : Port 0 AXI config */
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 */
if (wait_for_completion(DDR_PCTL + DDR_PCTL_STAT_OFFSET, 0x3))
return DDR_TIMEOUT;
return 0;
}