2020年12月09日 | TQ210 —— s5pv210 mem_setup.S分析

/*

 * Originates from Samsung's u-boot 1.1.6 port to S5PC1xx

 *

 * Copyright (C) 2009 Samsung Electrnoics

 * Inki Dae

 * Heungjun Kim

 * Minkyu Kang

 * Kyungmin Park

 *

 * 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

.globl mem_ctrl_asm_init

mem_ctrl_asm_init:

ldr r0, =0xe6000000 /*APB_DMC_BASE*/

ldr r1, =0xe0000000 /*PRO_ID_BASE*/

ldr r2, [r1] /*PRO_ID regiser*/

bic r2, #0xfffffdff

/******************** DLL initialization **************************/

@ldr r1, =0x6a101000

ldr r1, =0x50101000

str r1, [r0, #0x18] /*PHY control 0 register*/

@ldr r1, =0x000084f4

ldr r1, =0x000000f6

str r1, [r0, #0x1c] /*PHY control 1 register*/

ldr r1, =0x00000000

str r1, [r0, #0x20] /*PHY control 2 register*/

@ldr r1, =0x6A101002 @DLL on

ldr r1, =0x50101002

str r1, [r0, #0x18] /*PHY control 0 register*/

@ldr r1, =0x6A101003 @Dll start

ldr r1, =0x50101003

str r1, [r0, #0x18] /*PHY control 0 register*/

ldr r1, =0x50101003

str r1, [r0, #0x18] /*PHY control 0 register*/

ldr r1, =0x50101001

str r1, [r0, #0x18] /*PHY control 0 register*/

/************************** DLL initialization - END ************************/

@ldr     r1, =0x0FF01010 @auto refresh off

ldr r1, =0xFF001010

str     r1, [r0, #0x0] /*e6000000 = controller control register*/

@ldr     r1, =0x00212400 @ BL=4 , 2 chip , DDR2

ldr r1, =0xff202400

str     r1, [r0, #0x4] /*e6000004 = memory control register*/

@ 128MB config , 8banks , linear, Row=13bit,COL=10bit

@ldr r1, =0x20F01313

ldr r1, =0x20e00313

str r1, [r0, #0x8]

@ldr r1, =0x40F01313

ldr r1, =0x30e00323

str r1, [r0, #0xc]

ldr     r1, =0x20000000

str     r1, [r0, #0x14] /*precharge policy configuration register*/

@ldr     r1, =0x00100004

@str     r1, [r0, #0x28] /*precharge policy configuration register*/

/******************************************************************/

@ldr r1, =0x0000050e

ldr r1, =0x00000400

str     r1, [r0, #0x30] /*AC timing register for auto refresh of memory*/

@ldr r1, =0x16233297 @TimingRow @166MHz

ldr r1, =0x16233287

str     r1, [r0, #0x34] /*AC timing register for the row of memory*/

@; ldr r1, =0x24250304 @CL=5

@ldr r1, =0x23230000 @CL=3

ldr r1, =0x23240304

str r1, [r0, #0x38] /*AC timing register for the data of memory*/

@ldr     r1, =0x07c80232                 @Timing Power

ldr r1, =0x09c80232

str     r1, [r0, #0x3c] /*AC timing register for the power mode of memory*/

/************************ direct command for DDR2 ***********************/

ldr     r1, =0x07000000                 @chip0 Deselect

str     r1, [r0, #0x10] /*memory direct command register*/

ldr     r1, =0x01000000                 @chip0 PALL

str     r1, [r0, #0x10]

ldr     r1, =0x00020000                 @chip0 EMRS2

str     r1, [r0, #0x10]

ldr     r1, =0x00030000                 @chip0 EMRS3

str     r1, [r0, #0x10]

ldr     r1, =0x00010400 @chip0 EMRS1 (MEM DLL on = DQS# disable)

str     r1, [r0, #0x10]

@; ldr     r1, =0x00000552 @chip0 MRS (MEM DLL reset) CL=5, Burst Length=4

ldr     r1, =0x00000542 @chip0 MRS (MEM DLL reset) CL=3, Burst Length=4

str     r1, [r0, #0x10]

ldr     r1, =0x01000000                  @chip0 PALL

str     r1, [r0, #0x10]

ldr     r1, =0x05000000                  @chip0 REFA

str     r1, [r0, #0x10]

ldr     r1, =0x05000000                  @chip0 REFA

str     r1, [r0, #0x10]

@; ldr     r1, =0x00000452 @chip0 MRS (MEM DLL unreset) , BL=4 , CL=5

ldr     r1, =0x00000442 @chip0 MRS (MEM DLL unreset) , BL=4 , CL=3 

str     r1, [r0, #0x10]

ldr     r1, =0x00010780                  @chip0 EMRS1 (OCD default)

str     r1, [r0, #0x10]

ldr     r1, =0x00010400 @chip0 EMRS1 (OCD exit)  Reduced Strength

str     r1, [r0, #0x10]

/************************ direct command for DDR2 - END*******************/

@ldr     r1, =0x00FF20B0 @ConControl auto refresh on

ldr r1, =0xff01030

str     r1, [r0, #0x0] /*e6000000 = controller control register*/

ldr r1, =0x00100004

str r1, [r0, #0x28]

@ldr     r1, =0x00212413         @ MemControl

ldr r1, =0x00202400

str     r1, [r0, #0x4] /*e6000000 = controller control register*/

b exit_cpu_init

exit_cpu_init:

mov pc, lr