--- /dev/null
+/*
+ * Low-level board setup code for TI DaVinci SoC based boards.
+ *
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Partially based on TI sources, original copyrights follow:
+ */
+
+/*
+ * Board specific setup info
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * Modified for OMAP 1610 H2 board by Nishant Kamat, Jan 2004
+ *
+ * Modified for OMAP 5912 OSK board by Rishi Bhattacharya, Apr 2004
+ *
+ * Modified for DV-EVM board by Rishi Bhattacharya, Apr 2005
+ *
+ * Modified for DV-EVM board by Swaminathan S, Nov 2005
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+
+#define MDSTAT_STATE 0x3f
+
+.globl lowlevel_init
+lowlevel_init:
+#ifdef CONFIG_SOC_DM644X
+
+ /*-------------------------------------------------------*
+ * Mask all IRQs by setting all bits in the EINT default *
+ *-------------------------------------------------------*/
+ mov r1, $0
+ ldr r0, =EINT_ENABLE0
+ str r1, [r0]
+ ldr r0, =EINT_ENABLE1
+ str r1, [r0]
+
+ /*------------------------------------------------------*
+ * Put the GEM in reset *
+ *------------------------------------------------------*/
+
+ /* Put the GEM in reset */
+ ldr r8, PSC_GEM_FLAG_CLEAR
+ ldr r6, MDCTL_GEM
+ ldr r7, [r6]
+ and r7, r7, r8
+ str r7, [r6]
+
+ /* Enable the Power Domain Transition Command */
+ ldr r6, PTCMD
+ ldr r7, [r6]
+ orr r7, r7, $0x02
+ str r7, [r6]
+
+ /* Check for Transition Complete(PTSTAT) */
+checkStatClkStopGem:
+ ldr r6, PTSTAT
+ ldr r7, [r6]
+ ands r7, r7, $0x02
+ bne checkStatClkStopGem
+
+ /* Check for GEM Reset Completion */
+checkGemStatClkStop:
+ ldr r6, MDSTAT_GEM
+ ldr r7, [r6]
+ ands r7, r7, $0x100
+ bne checkGemStatClkStop
+
+ /* Do this for enabling a WDT initiated reset this is a workaround
+ for a chip bug. Not required under normal situations */
+ ldr r6, P1394
+ mov r10, $0
+ str r10, [r6]
+
+ /*------------------------------------------------------*
+ * Enable L1 & L2 Memories in Fast mode *
+ *------------------------------------------------------*/
+ ldr r6, DFT_ENABLE
+ mov r10, $0x01
+ str r10, [r6]
+
+ ldr r6, MMARG_BRF0
+ ldr r10, MMARG_BRF0_VAL
+ str r10, [r6]
+
+ ldr r6, DFT_ENABLE
+ mov r10, $0
+ str r10, [r6]
+
+ /*------------------------------------------------------*
+ * DDR2 PLL Initialization *
+ *------------------------------------------------------*/
+
+ /* Select the Clock Mode Depending on the Value written in the Boot Table by the run script */
+ mov r10, $0
+ ldr r6, PLL2_CTL
+ ldr r7, PLL_CLKSRC_MASK
+ ldr r8, [r6]
+ and r8, r8, r7
+ mov r9, r10, lsl $8
+ orr r8, r8, r9
+ str r8, [r6]
+
+ /* Select the PLLEN source */
+ ldr r7, PLL_ENSRC_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Bypass the PLL */
+ ldr r7, PLL_BYPASS_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Wait for few cycles to allow PLLEN Mux switch properly to bypass Clock */
+ mov r10, $0x20
+WaitPPL2Loop:
+ subs r10, r10, $1
+ bne WaitPPL2Loop
+
+ /* Reset the PLL */
+ ldr r7, PLL_RESET_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Power up the PLL */
+ ldr r7, PLL_PWRUP_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Enable the PLL from Disable Mode */
+ ldr r7, PLL_DISABLE_ENABLE_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Program the PLL Multiplier */
+ ldr r6, PLL2_PLLM
+ mov r2, $0x17 /* 162 MHz */
+ str r2, [r6]
+
+ /* Program the PLL2 Divisor Value */
+ ldr r6, PLL2_DIV2
+ mov r3, $0x01
+ str r3, [r6]
+
+ /* Program the PLL2 Divisor Value */
+ ldr r6, PLL2_DIV1
+ mov r4, $0x0b /* 54 MHz */
+ str r4, [r6]
+
+ /* PLL2 DIV2 MMR */
+ ldr r8, PLL2_DIV_MASK
+ ldr r6, PLL2_DIV2
+ ldr r9, [r6]
+ and r8, r8, r9
+ mov r9, $0x01
+ mov r9, r9, lsl $15
+ orr r8, r8, r9
+ str r8, [r6]
+
+ /* Program the GOSET bit to take new divider values */
+ ldr r6, PLL2_PLLCMD
+ ldr r7, [r6]
+ orr r7, r7, $0x01
+ str r7, [r6]
+
+ /* Wait for Done */
+ ldr r6, PLL2_PLLSTAT
+doneLoop_0:
+ ldr r7, [r6]
+ ands r7, r7, $0x01
+ bne doneLoop_0
+
+ /* PLL2 DIV1 MMR */
+ ldr r8, PLL2_DIV_MASK
+ ldr r6, PLL2_DIV1
+ ldr r9, [r6]
+ and r8, r8, r9
+ mov r9, $0x01
+ mov r9, r9, lsl $15
+ orr r8, r8, r9
+ str r8, [r6]
+
+ /* Program the GOSET bit to take new divider values */
+ ldr r6, PLL2_PLLCMD
+ ldr r7, [r6]
+ orr r7, r7, $0x01
+ str r7, [r6]
+
+ /* Wait for Done */
+ ldr r6, PLL2_PLLSTAT
+doneLoop:
+ ldr r7, [r6]
+ ands r7, r7, $0x01
+ bne doneLoop
+
+ /* Wait for PLL to Reset Properly */
+ mov r10, $0x218
+ResetPPL2Loop:
+ subs r10, r10, $1
+ bne ResetPPL2Loop
+
+ /* Bring PLL out of Reset */
+ ldr r6, PLL2_CTL
+ ldr r8, [r6]
+ orr r8, r8, $0x08
+ str r8, [r6]
+
+ /* Wait for PLL to Lock */
+ ldr r10, PLL_LOCK_COUNT
+PLL2Lock:
+ subs r10, r10, $1
+ bne PLL2Lock
+
+ /* Enable the PLL */
+ ldr r6, PLL2_CTL
+ ldr r8, [r6]
+ orr r8, r8, $0x01
+ str r8, [r6]
+
+ /*------------------------------------------------------*
+ * Issue Soft Reset to DDR Module *
+ *------------------------------------------------------*/
+
+ /* Shut down the DDR2 LPSC Module */
+ ldr r8, PSC_FLAG_CLEAR
+ ldr r6, MDCTL_DDR2
+ ldr r7, [r6]
+ and r7, r7, r8
+ orr r7, r7, $0x03
+ str r7, [r6]
+
+ /* Enable the Power Domain Transition Command */
+ ldr r6, PTCMD
+ ldr r7, [r6]
+ orr r7, r7, $0x01
+ str r7, [r6]
+
+ /* Check for Transition Complete(PTSTAT) */
+checkStatClkStop:
+ ldr r6, PTSTAT
+ ldr r7, [r6]
+ ands r7, r7, $0x01
+ bne checkStatClkStop
+
+ /* Check for DDR2 Controller Enable Completion */
+checkDDRStatClkStop:
+ ldr r6, MDSTAT_DDR2
+ ldr r7, [r6]
+ and r7, r7, $MDSTAT_STATE
+ cmp r7, $0x03
+ bne checkDDRStatClkStop
+
+ /*------------------------------------------------------*
+ * Program DDR2 MMRs for 162MHz Setting *
+ *------------------------------------------------------*/
+
+ /* Program PHY Control Register */
+ ldr r6, DDRCTL
+ ldr r7, DDRCTL_VAL
+ str r7, [r6]
+
+ /* Program SDRAM Bank Config Register */
+ ldr r6, SDCFG
+ ldr r7, SDCFG_VAL
+ str r7, [r6]
+
+ /* Program SDRAM TIM-0 Config Register */
+ ldr r6, SDTIM0
+ ldr r7, SDTIM0_VAL_162MHz
+ str r7, [r6]
+
+ /* Program SDRAM TIM-1 Config Register */
+ ldr r6, SDTIM1
+ ldr r7, SDTIM1_VAL_162MHz
+ str r7, [r6]
+
+ /* Program the SDRAM Bank Config Control Register */
+ ldr r10, MASK_VAL
+ ldr r8, SDCFG
+ ldr r9, SDCFG_VAL
+ and r9, r9, r10
+ str r9, [r8]
+
+ /* Program SDRAM SDREF Config Register */
+ ldr r6, SDREF
+ ldr r7, SDREF_VAL
+ str r7, [r6]
+
+ /*------------------------------------------------------*
+ * Issue Soft Reset to DDR Module *
+ *------------------------------------------------------*/
+
+ /* Issue a Dummy DDR2 read/write */
+ ldr r8, DDR2_START_ADDR
+ ldr r7, DUMMY_VAL
+ str r7, [r8]
+ ldr r7, [r8]
+
+ /* Shut down the DDR2 LPSC Module */
+ ldr r8, PSC_FLAG_CLEAR
+ ldr r6, MDCTL_DDR2
+ ldr r7, [r6]
+ and r7, r7, r8
+ orr r7, r7, $0x01
+ str r7, [r6]
+
+ /* Enable the Power Domain Transition Command */
+ ldr r6, PTCMD
+ ldr r7, [r6]
+ orr r7, r7, $0x01
+ str r7, [r6]
+
+ /* Check for Transition Complete(PTSTAT) */
+checkStatClkStop2:
+ ldr r6, PTSTAT
+ ldr r7, [r6]
+ ands r7, r7, $0x01
+ bne checkStatClkStop2
+
+ /* Check for DDR2 Controller Enable Completion */
+checkDDRStatClkStop2:
+ ldr r6, MDSTAT_DDR2
+ ldr r7, [r6]
+ and r7, r7, $MDSTAT_STATE
+ cmp r7, $0x01
+ bne checkDDRStatClkStop2
+
+ /*------------------------------------------------------*
+ * Turn DDR2 Controller Clocks On *
+ *------------------------------------------------------*/
+
+ /* Enable the DDR2 LPSC Module */
+ ldr r6, MDCTL_DDR2
+ ldr r7, [r6]
+ orr r7, r7, $0x03
+ str r7, [r6]
+
+ /* Enable the Power Domain Transition Command */
+ ldr r6, PTCMD
+ ldr r7, [r6]
+ orr r7, r7, $0x01
+ str r7, [r6]
+
+ /* Check for Transition Complete(PTSTAT) */
+checkStatClkEn2:
+ ldr r6, PTSTAT
+ ldr r7, [r6]
+ ands r7, r7, $0x01
+ bne checkStatClkEn2
+
+ /* Check for DDR2 Controller Enable Completion */
+checkDDRStatClkEn2:
+ ldr r6, MDSTAT_DDR2
+ ldr r7, [r6]
+ and r7, r7, $MDSTAT_STATE
+ cmp r7, $0x03
+ bne checkDDRStatClkEn2
+
+ /* DDR Writes and Reads */
+ ldr r6, CFGTEST
+ mov r3, $0x01
+ str r3, [r6]
+
+ /*------------------------------------------------------*
+ * System PLL Initialization *
+ *------------------------------------------------------*/
+
+ /* Select the Clock Mode Depending on the Value written in the Boot Table by the run script */
+ mov r2, $0
+ ldr r6, PLL1_CTL
+ ldr r7, PLL_CLKSRC_MASK
+ ldr r8, [r6]
+ and r8, r8, r7
+ mov r9, r2, lsl $8
+ orr r8, r8, r9
+ str r8, [r6]
+
+ /* Select the PLLEN source */
+ ldr r7, PLL_ENSRC_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Bypass the PLL */
+ ldr r7, PLL_BYPASS_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Wait for few cycles to allow PLLEN Mux switch properly to bypass Clock */
+ mov r10, $0x20
+
+WaitLoop:
+ subs r10, r10, $1
+ bne WaitLoop
+
+ /* Reset the PLL */
+ ldr r7, PLL_RESET_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Disable the PLL */
+ orr r8, r8, $0x10
+ str r8, [r6]
+
+ /* Power up the PLL */
+ ldr r7, PLL_PWRUP_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Enable the PLL from Disable Mode */
+ ldr r7, PLL_DISABLE_ENABLE_MASK
+ and r8, r8, r7
+ str r8, [r6]
+
+ /* Program the PLL Multiplier */
+ ldr r6, PLL1_PLLM
+ mov r3, $0x15 /* For 594MHz */
+ str r3, [r6]
+
+ /* Wait for PLL to Reset Properly */
+ mov r10, $0xff
+
+ResetLoop:
+ subs r10, r10, $1
+ bne ResetLoop
+
+ /* Bring PLL out of Reset */
+ ldr r6, PLL1_CTL
+ orr r8, r8, $0x08
+ str r8, [r6]
+
+ /* Wait for PLL to Lock */
+ ldr r10, PLL_LOCK_COUNT
+
+PLL1Lock:
+ subs r10, r10, $1
+ bne PLL1Lock
+
+ /* Enable the PLL */
+ orr r8, r8, $0x01
+ str r8, [r6]
+
+ nop
+ nop
+ nop
+ nop
+
+ /*------------------------------------------------------*
+ * AEMIF configuration for NOR Flash (double check) *
+ *------------------------------------------------------*/
+ ldr r0, _PINMUX0
+ ldr r1, _DEV_SETTING
+ str r1, [r0]
+
+ ldr r0, WAITCFG
+ ldr r1, WAITCFG_VAL
+ ldr r2, [r0]
+ orr r2, r2, r1
+ str r2, [r0]
+
+ ldr r0, ACFG3
+ ldr r1, ACFG3_VAL
+ ldr r2, [r0]
+ and r1, r2, r1
+ str r1, [r0]
+
+ ldr r0, ACFG4
+ ldr r1, ACFG4_VAL
+ ldr r2, [r0]
+ and r1, r2, r1
+ str r1, [r0]
+
+ ldr r0, ACFG5
+ ldr r1, ACFG5_VAL
+ ldr r2, [r0]
+ and r1, r2, r1
+ str r1, [r0]
+
+ /*--------------------------------------*
+ * VTP manual Calibration *
+ *--------------------------------------*/
+ ldr r0, VTPIOCR
+ ldr r1, VTP_MMR0
+ str r1, [r0]
+
+ ldr r0, VTPIOCR
+ ldr r1, VTP_MMR1
+ str r1, [r0]
+
+ /* Wait for 33 VTP CLK cycles. VRP operates at 27 MHz */
+ ldr r10, VTP_LOCK_COUNT
+VTPLock:
+ subs r10, r10, $1
+ bne VTPLock
+
+ ldr r6, DFT_ENABLE
+ mov r10, $0x01
+ str r10, [r6]
+
+ ldr r6, DDRVTPR
+ ldr r7, [r6]
+ mov r8, r7, LSL #32-10
+ mov r8, r8, LSR #32-10 /* grab low 10 bits */
+ ldr r7, VTP_RECAL
+ orr r8, r7, r8
+ ldr r7, VTP_EN
+ orr r8, r7, r8
+ str r8, [r0]
+
+
+ /* Wait for 33 VTP CLK cycles. VRP operates at 27 MHz */
+ ldr r10, VTP_LOCK_COUNT
+VTP1Lock:
+ subs r10, r10, $1
+ bne VTP1Lock
+
+ ldr r1, [r0]
+ ldr r2, VTP_MASK
+ and r2, r1, r2
+ str r2, [r0]
+
+ ldr r6, DFT_ENABLE
+ mov r10, $0
+ str r10, [r6]
+
+ /*
+ * Call board-specific lowlevel init.
+ * That MUST be present and THAT returns
+ * back to arch calling code with "mov pc, lr."
+ */
+ b dv_board_init
+
+.ltorg
+
+_PINMUX0:
+ .word 0x01c40000 /* Device Configuration Registers */
+_PINMUX1:
+ .word 0x01c40004 /* Device Configuration Registers */
+
+_DEV_SETTING:
+ .word 0x00000c1f
+
+WAITCFG:
+ .word 0x01e00004
+WAITCFG_VAL:
+ .word 0
+ACFG3:
+ .word 0x01e00014
+ACFG3_VAL:
+ .word 0x3ffffffd
+ACFG4:
+ .word 0x01e00018
+ACFG4_VAL:
+ .word 0x3ffffffd
+ACFG5:
+ .word 0x01e0001c
+ACFG5_VAL:
+ .word 0x3ffffffd
+
+MDCTL_DDR2:
+ .word 0x01c41a34
+MDSTAT_DDR2:
+ .word 0x01c41834
+
+PTCMD:
+ .word 0x01c41120
+PTSTAT:
+ .word 0x01c41128
+
+EINT_ENABLE0:
+ .word 0x01c48018
+EINT_ENABLE1:
+ .word 0x01c4801c
+
+PSC_FLAG_CLEAR:
+ .word 0xffffffe0
+PSC_GEM_FLAG_CLEAR:
+ .word 0xfffffeff
+
+/* DDR2 MMR & CONFIGURATION VALUES, 162 MHZ clock */
+DDRCTL:
+ .word 0x200000e4
+DDRCTL_VAL:
+ .word 0x50006405
+SDREF:
+ .word 0x2000000c
+SDREF_VAL:
+ .word 0x000005c3
+SDCFG:
+ .word 0x20000008
+SDCFG_VAL:
+#ifdef DDR_4BANKS
+ .word 0x00178622
+#elif defined DDR_8BANKS
+ .word 0x00178632
+#else
+#error "Unknown DDR configuration!!!"
+#endif
+SDTIM0:
+ .word 0x20000010
+SDTIM0_VAL_162MHz:
+ .word 0x28923211
+SDTIM1:
+ .word 0x20000014
+SDTIM1_VAL_162MHz:
+ .word 0x0016c722
+VTPIOCR:
+ .word 0x200000f0 /* VTP IO Control register */
+DDRVTPR:
+ .word 0x01c42030 /* DDR VPTR MMR */
+VTP_MMR0:
+ .word 0x201f
+VTP_MMR1:
+ .word 0xa01f
+DFT_ENABLE:
+ .word 0x01c4004c
+VTP_LOCK_COUNT:
+ .word 0x5b0
+VTP_MASK:
+ .word 0xffffdfff
+VTP_RECAL:
+ .word 0x08000
+VTP_EN:
+ .word 0x02000
+CFGTEST:
+ .word 0x80010000
+MASK_VAL:
+ .word 0x00000fff
+
+/* GEM Power Up & LPSC Control Register */
+MDCTL_GEM:
+ .word 0x01c41a9c
+MDSTAT_GEM:
+ .word 0x01c4189c
+
+/* For WDT reset chip bug */
+P1394:
+ .word 0x01c41a20
+
+PLL_CLKSRC_MASK:
+ .word 0xfffffeff /* Mask the Clock Mode bit */
+PLL_ENSRC_MASK:
+ .word 0xffffffdf /* Select the PLLEN source */
+PLL_BYPASS_MASK:
+ .word 0xfffffffe /* Put the PLL in BYPASS */
+PLL_RESET_MASK:
+ .word 0xfffffff7 /* Put the PLL in Reset Mode */
+PLL_PWRUP_MASK:
+ .word 0xfffffffd /* PLL Power up Mask Bit */
+PLL_DISABLE_ENABLE_MASK:
+ .word 0xffffffef /* Enable the PLL from Disable */
+PLL_LOCK_COUNT:
+ .word 0x2000
+
+/* PLL1-SYSTEM PLL MMRs */
+PLL1_CTL:
+ .word 0x01c40900
+PLL1_PLLM:
+ .word 0x01c40910
+
+/* PLL2-SYSTEM PLL MMRs */
+PLL2_CTL:
+ .word 0x01c40d00
+PLL2_PLLM:
+ .word 0x01c40d10
+PLL2_DIV1:
+ .word 0x01c40d18
+PLL2_DIV2:
+ .word 0x01c40d1c
+PLL2_PLLCMD:
+ .word 0x01c40d38
+PLL2_PLLSTAT:
+ .word 0x01c40d3c
+PLL2_DIV_MASK:
+ .word 0xffff7fff
+
+MMARG_BRF0:
+ .word 0x01c42010 /* BRF margin mode 0 (R/W)*/
+MMARG_BRF0_VAL:
+ .word 0x00444400
+
+DDR2_START_ADDR:
+ .word 0x80000000
+DUMMY_VAL:
+ .word 0xa55aa55a
+#else /* CONFIG_SOC_DM644X */
+ mov pc, lr
+#endif
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