diff options
Diffstat (limited to 'arch/cris/arch-v32/mach-a3/dram_init.S')
-rw-r--r-- | arch/cris/arch-v32/mach-a3/dram_init.S | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/arch/cris/arch-v32/mach-a3/dram_init.S b/arch/cris/arch-v32/mach-a3/dram_init.S deleted file mode 100644 index 733c3564ad79..000000000000 --- a/arch/cris/arch-v32/mach-a3/dram_init.S +++ /dev/null @@ -1,119 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * DDR SDRAM initialization - alter with care - * This file is intended to be included from other assembler files - * - * Note: This file may not modify r8 or r9 because they are used to - * carry information from the decompressor to the kernel - * - * Copyright (C) 2005-2007 Axis Communications AB - * - * Authors: Mikael Starvik <starvik@axis.com> - */ - -/* Just to be certain the config file is included, we include it here - * explicitly instead of depending on it being included in the file that - * uses this code. - */ - -#include <hwregs/asm/reg_map_asm.h> -#include <hwregs/asm/ddr2_defs_asm.h> - - ;; WARNING! The registers r8 and r9 are used as parameters carrying - ;; information from the decompressor (if the kernel was compressed). - ;; They should not be used in the code below. - - ;; Refer to ddr2 MDS for initialization sequence - - ; 2. Wait 200us - move.d 10000, $r2 -1: bne 1b - subq 1, $r2 - - ; Start clock - move.d REG_ADDR(ddr2, regi_ddr2_ctrl, rw_phy_cfg), $r0 - move.d REG_STATE(ddr2, rw_phy_cfg, en, yes), $r1 - move.d $r1, [$r0] - - ; 2. Wait 200us - move.d 10000, $r2 -1: bne 1b - subq 1, $r2 - - ; Reset phy and start calibration - move.d REG_ADDR(ddr2, regi_ddr2_ctrl, rw_phy_ctrl), $r0 - move.d REG_STATE(ddr2, rw_phy_ctrl, rst, yes) | \ - REG_STATE(ddr2, rw_phy_ctrl, cal_rst, yes), $r1 - move.d $r1, [$r0] - move.d REG_STATE(ddr2, rw_phy_ctrl, cal_start, yes), $r1 - move.d $r1, [$r0] - - ; 2. Wait 200us - move.d 10000, $r2 -1: bne 1b - subq 1, $r2 - - ; Issue commands - move.d REG_ADDR(ddr2, regi_ddr2_ctrl, rw_ctrl), $r0 - move.d sdram_commands_start, $r2 -command_loop: - movu.b [$r2+], $r1 - movu.w [$r2+], $r3 -do_cmd: - lslq 16, $r1 - or.d $r3, $r1 - move.d $r1, [$r0] - ; 2. Wait 200us - move.d 10000, $r4 -1: bne 1b - subq 1, $r4 - cmp.d sdram_commands_end, $r2 - blo command_loop - nop - - ; Set timing - move.d REG_ADDR(ddr2, regi_ddr2_ctrl, rw_timing), $r0 - move.d CONFIG_ETRAX_DDR2_TIMING, $r1 - move.d $r1, [$r0] - - ; Set latency - move.d REG_ADDR(ddr2, regi_ddr2_ctrl, rw_latency), $r0 - move.d CONFIG_ETRAX_DDR2_LATENCY, $r1 - move.d $r1, [$r0] - - ; Set configuration - move.d REG_ADDR(ddr2, regi_ddr2_ctrl, rw_cfg), $r0 - move.d CONFIG_ETRAX_DDR2_CONFIG, $r1 - move.d $r1, [$r0] - - ba after_sdram_commands - nop - -sdram_commands_start: - .byte regk_ddr2_deselect - .word 0 - .byte regk_ddr2_pre - .word regk_ddr2_pre_all - .byte regk_ddr2_emrs2 - .word 0 - .byte regk_ddr2_emrs3 - .word 0 - .byte regk_ddr2_emrs - .word regk_ddr2_dll_en - .byte regk_ddr2_mrs - .word regk_ddr2_dll_rst - .byte regk_ddr2_pre - .word regk_ddr2_pre_all - .byte regk_ddr2_ref - .word 0 - .byte regk_ddr2_ref - .word 0 - .byte regk_ddr2_mrs - .word CONFIG_ETRAX_DDR2_MRS & 0xffff - .byte regk_ddr2_emrs - .word regk_ddr2_ocd_default | regk_ddr2_dll_en - .byte regk_ddr2_emrs - .word regk_ddr2_ocd_exit | regk_ddr2_dll_en | (CONFIG_ETRAX_DDR2_MRS >> 16) -sdram_commands_end: - .align 1 -after_sdram_commands: |