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/*
* Originates from Samsung's u-boot 1.1.6 port to S5PC1xx
*
* Copyright (C) 2009 Samsung Electrnoics
* Inki Dae <inki.dae@samsung.com>
* Heungjun Kim <riverful.kim@samsung.com>
* Minkyu Kang <mk7.kang@samsung.com>
* Kyungmin Park <kyungmin.park@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
.globl mem_ctrl_asm_init
mem_ctrl_asm_init:
ldr r6, =S5PC100_DMC_BASE @ 0xE6000000
/* DLL parameter setting */
ldr r1, =0x50101000
str r1, [r6, #0x018] @ PHYCONTROL0
ldr r1, =0xf4
str r1, [r6, #0x01C] @ PHYCONTROL1
ldr r1, =0x0
str r1, [r6, #0x020] @ PHYCONTROL2
/* DLL on */
ldr r1, =0x50101002
str r1, [r6, #0x018] @ PHYCONTROL0
/* DLL start */
ldr r1, =0x50101003
str r1, [r6, #0x018] @ PHYCONTROL0
/* Force value locking for DLL off */
str r1, [r6, #0x018] @ PHYCONTROL0
/* DLL off */
ldr r1, =0x50101001
str r1, [r6, #0x018] @ PHYCONTROL0
/* auto refresh off */
ldr r1, =0xff001010
str r1, [r6, #0x000] @ CONCONTROL
/*
* Burst Length 4, 2 chips, 32-bit, LPDDR
* OFF: dynamic self refresh, force precharge, dynamic power down off
*/
ldr r1, =0x00212100
str r1, [r6, #0x004] @ MEMCONTROL
/*
* Note:
* If Bank0 has OneDRAM we place it at 0x2800'0000
* So finally Bank1 should address start at at 0x2000'0000
*/
mov r4, #0x0
swap_memory:
/*
* Bank0
* 0x30 -> 0x30000000
* 0xf8 -> 0x37FFFFFF
* [15:12] 0: Linear
* [11:8 ] 2: 9 bits
* [ 7:4 ] 2: 14 bits
* [ 3:0 ] 2: 4 banks
*/
ldr r1, =0x30f80222
/* if r4 is 1, swap the bank */
cmp r4, #0x1
orreq r1, r1, #0x08000000
str r1, [r6, #0x008] @ MEMCONFIG0
/*
* Bank1
* 0x38 -> 0x38000000
* 0xf8 -> 0x3fFFFFFF
* [15:12] 0: Linear
* [11:8 ] 2: 9 bits
* [ 7:4 ] 2: 14 bits
* [ 3:0 ] 2: 4 banks
*/
ldr r1, =0x38f80222
/* if r4 is 1, swap the bank */
cmp r4, #0x1
biceq r1, r1, #0x08000000
str r1, [r6, #0x00c] @ MEMCONFIG1
ldr r1, =0x20000000
str r1, [r6, #0x014] @ PRECHCONFIG
/*
* FIXME: Please verify these values
* 7.8us * 166MHz %LE %LONG1294(0x50E)
* 7.8us * 133MHz %LE %LONG1038(0x40E),
* 7.8us * 100MHz %LE %LONG780(0x30C),
* 7.8us * 20MHz %LE %LONG156(0x9C),
* 7.8us * 10MHz %LE %LONG78(0x4E)
*/
ldr r1, =0x0000050e
str r1, [r6, #0x030] @ TIMINGAREF
/* 166 MHz */
ldr r1, =0x0c233287
str r1, [r6, #0x034] @ TIMINGROW
/* twtr=3 twr=2 trtp=3 cl=3 wl=3 rl=3 */
ldr r1, =0x32330303
str r1, [r6, #0x038] @ TIMINGDATA
/* tfaw=4 sxsr=0x14 txp=0x14 tcke=3 tmrd=3 */
ldr r1, =0x04141433
str r1, [r6, #0x03C] @ TIMINGPOWER
/* chip0 Deselect */
ldr r1, =0x07000000
str r1, [r6, #0x010] @ DIRECTCMD
/* chip0 PALL */
ldr r1, =0x01000000
str r1, [r6, #0x010] @ DIRECTCMD
/* chip0 REFA */
ldr r1, =0x05000000
str r1, [r6, #0x010] @ DIRECTCMD
/* chip0 REFA */
str r1, [r6, #0x010] @ DIRECTCMD
/* chip0 MRS, CL%LE %LONG3, BL%LE %LONG4 */
ldr r1, =0x00000032
str r1, [r6, #0x010] @ DIRECTCMD
/* chip1 Deselect */
ldr r1, =0x07100000
str r1, [r6, #0x010] @ DIRECTCMD
/* chip1 PALL */
ldr r1, =0x01100000
str r1, [r6, #0x010] @ DIRECTCMD
/* chip1 REFA */
ldr r1, =0x05100000
str r1, [r6, #0x010] @ DIRECTCMD
/* chip1 REFA */
str r1, [r6, #0x010] @ DIRECTCMD
/* chip1 MRS, CL%LE %LONG3, BL%LE %LONG4 */
ldr r1, =0x00100032
str r1, [r6, #0x010] @ DIRECTCMD
/* auto refresh on */
ldr r1, =0xff002030
str r1, [r6, #0x000] @ CONCONTROL
/* PwrdnConfig */
ldr r1, =0x00100002
str r1, [r6, #0x028] @ PWRDNCONFIG
/* BL%LE %LONG */
ldr r1, =0xff212100
str r1, [r6, #0x004] @ MEMCONTROL
/* Try to test memory area */
cmp r4, #0x1
beq 1f
mov r4, #0x1
ldr r1, =0x37ffff00
str r4, [r1]
str r4, [r1, #0x4] @ dummy write
ldr r0, [r1]
cmp r0, r4
bne swap_memory
1:
mov pc, lr
.ltorg
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