From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.69 #1 (Red Hat Linux)) id 1O7OXj-0008Ds-UE for barebox@lists.infradead.org; Thu, 29 Apr 2010 07:52:24 +0000 From: Sascha Hauer Date: Thu, 29 Apr 2010 09:52:15 +0200 Message-Id: <1272527535-17527-18-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1272527535-17527-1-git-send-email-s.hauer@pengutronix.de> References: <1272527535-17527-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 17/17] pcm038: reimplement lowlevel code in C To: barebox@lists.infradead.org Signed-off-by: Sascha Hauer --- board/pcm038/Makefile | 2 +- board/pcm038/lowlevel.c | 117 ++++++++++++++++++++++++++++++++++++++++++ board/pcm038/lowlevel_init.S | 116 ----------------------------------------- board/pcm038/pcm038.c | 9 --- 4 files changed, 118 insertions(+), 126 deletions(-) create mode 100644 board/pcm038/lowlevel.c delete mode 100644 board/pcm038/lowlevel_init.S diff --git a/board/pcm038/Makefile b/board/pcm038/Makefile index d978c77..a681dda 100644 --- a/board/pcm038/Makefile +++ b/board/pcm038/Makefile @@ -1,3 +1,3 @@ -obj-y += lowlevel_init.o pll_init.o +obj-y += lowlevel.o pll_init.o obj-y += pcm038.o diff --git a/board/pcm038/lowlevel.c b/board/pcm038/lowlevel.c new file mode 100644 index 0000000..0c376f2 --- /dev/null +++ b/board/pcm038/lowlevel.c @@ -0,0 +1,117 @@ +/* + * + * (c) 2007 Pengutronix, Sascha Hauer + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void __bare_init __naked insdram(void) +{ + uint32_t r; + + PCCR1 |= PCCR1_NFC_BAUDEN; + + /* setup a stack to be able to call imx_nand_load_image() */ + r = STACK_BASE + STACK_SIZE - 12; + __asm__ __volatile__("mov sp, %0" : : "r"(r)); + + imx_nand_load_image((void *)TEXT_BASE, 256 * 1024); + + board_init_lowlevel_return(); +} + +#define ESDCTL0_VAL (ESDCTL0_SDE | ESDCTL0_ROW13 | ESDCTL0_COL10) + +void __bare_init __naked board_init_lowlevel(void) +{ + uint32_t r; + int i; + unsigned int *trg, *src; + + /* ahb lite ip interface */ + AIPI1_PSR0 = 0x20040304; + AIPI1_PSR1 = 0xDFFBFCFB; + AIPI2_PSR0 = 0x00000000; + AIPI2_PSR1 = 0xFFFFFFFF; + + /* Skip SDRAM initialization if we run from RAM */ + r = get_pc(); + if (r > 0xa0000000 && r < 0xb0000000) + board_init_lowlevel_return(); + + /* + * DDR on CSD0 + */ + writel(0x00000008, ESDMISC); /* Enable DDR SDRAM operation */ + + DSCR(3) = 0x55555555; /* Set the driving strength */ + DSCR(5) = 0x55555555; + DSCR(6) = 0x55555555; + DSCR(7) = 0x00005005; + DSCR(8) = 0x15555555; + + writel(0x00000004, ESDMISC); /* Initial reset */ + writel(0x006ac73a, ESDCFG0); + + writel(ESDCTL0_VAL | ESDCTL0_SMODE_PRECHARGE, ESDCTL0); /* precharge CSD0 all banks */ + writel(0x00000000, 0xA0000F00); /* CSD0 precharge address (A10 = 1) */ + writel(ESDCTL0_VAL | ESDCTL0_SMODE_AUTO_REFRESH, ESDCTL0); + + for (i = 0; i < 8; i++) + writel(0, 0xa0000f00); + + writel(ESDCTL0_VAL | ESDCTL0_SMODE_LOAD_MODE, ESDCTL0); + + writeb(0xda, 0xa0000033); + writeb(0xff, 0xa1000000); + writel(ESDCTL0_VAL | ESDCTL0_DSIZ_31_0 | ESDCTL0_REF4 | + ESDCTL0_BL | ESDCTL0_SMODE_NORMAL, ESDCTL0); + +#ifdef CONFIG_NAND_IMX_BOOT + /* skip NAND boot if not running from NFC space */ + r = get_pc(); + if (r < IMX_NFC_BASE || r > IMX_NFC_BASE + 0x800) + board_init_lowlevel_return(); + + src = (unsigned int *)IMX_NFC_BASE; + trg = (unsigned int *)TEXT_BASE; + + /* Move ourselves out of NFC SRAM */ + for (i = 0; i < 0x800 / sizeof(int); i++) + *trg++ = *src++; + + /* Jump to SDRAM */ + r = (unsigned int)&insdram; + __asm__ __volatile__("mov pc, %0" : : "r"(r)); +#else + board_init_lowlevel_return(); +#endif +} + diff --git a/board/pcm038/lowlevel_init.S b/board/pcm038/lowlevel_init.S deleted file mode 100644 index 0001e4f..0000000 --- a/board/pcm038/lowlevel_init.S +++ /dev/null @@ -1,116 +0,0 @@ -/* - * For clock initialization, see chapter 3 of the "MCIMX27 Multimedia - * Applications Processor Reference Manual, Rev. 0.2". - * - */ - -#include -#include - -#define writel(val, reg) \ - ldr r0, =reg; \ - ldr r1, =val; \ - str r1, [r0]; - - -#define ESDCTL0_VAL (ESDCTL0_SDE | ESDCTL0_ROW13 | ESDCTL0_COL10) - -.macro sdram_init - /* - * DDR on CSD0 - */ - writel(0x00000008, ESDMISC) /* Enable DDR SDRAM operation */ - - writel(0x55555555, DSCR(3)) /* Set the driving strength */ - writel(0x55555555, DSCR(5)) - writel(0x55555555, DSCR(6)) - writel(0x00005005, DSCR(7)) - writel(0x15555555, DSCR(8)) - - writel(0x00000004, ESDMISC) /* Initial reset */ - - /* - * tXP=3, tWTR=0, tRP=2, tMRD=2, tWR=1, - * tRAS=4, tRRD=1, tCAS=3, tRCD=3, tRC=10 - */ - writel(0x006ac73a, ESDCFG0) - - writel(ESDCTL0_VAL | ESDCTL0_SMODE_PRECHARGE, ESDCTL0) /* precharge CSD0 all banks */ - writel(0x00000000, 0xA0000F00) /* CSD0 precharge address (A10 = 1) */ - writel(ESDCTL0_VAL | ESDCTL0_SMODE_AUTO_REFRESH, ESDCTL0) - - ldr r0, =0xa0000f00 - mov r1, #0 - mov r2, #8 -1: - str r1, [r0] - subs r2, #1 - bne 1b - - writel(ESDCTL0_VAL | ESDCTL0_SMODE_LOAD_MODE, ESDCTL0) - ldr r0, =0xA0000033 - mov r1, #0xda - strb r1, [r0] - ldr r0, =0xA1000000 - mov r1, #0xff - strb r1, [r0] - writel(ESDCTL0_VAL | ESDCTL0_DSIZ_31_0 | ESDCTL0_REF4 | ESDCTL0_BL | ESDCTL0_SMODE_NORMAL, ESDCTL0) -.endm - - .section ".text_bare_init","ax" - -.globl board_init_lowlevel -board_init_lowlevel: - - mov r10, lr - - /* ahb lite ip interface */ - writel(0x20040304, AIPI1_PSR0) - writel(0xDFFBFCFB, AIPI1_PSR1) - writel(0x00000000, AIPI2_PSR0) - writel(0xFFFFFFFF, AIPI2_PSR1) - - /* skip sdram initialization if we run from ram */ - cmp pc, #0xa0000000 - bls 1f - cmp pc, #0xc0000000 - bhi 1f - - mov pc,r10 -1: - sdram_init - -#ifdef CONFIG_NAND_IMX_BOOT - ldr sp, =0xa0f00000 /* Setup a temporary stack in SDRAM */ - - ldr r0, =IMX_NFC_BASE /* start of NFC SRAM */ - ldr r2, =IMX_NFC_BASE + 0x1000 /* end of NFC SRAM */ - - /* skip NAND boot if not running from NFC space */ - cmp pc, r0 - bls ret - cmp pc, r2 - bhi ret - - /* Move ourselves out of NFC SRAM */ - ldr r1, =TEXT_BASE - -copy_loop: - ldmia r0!, {r3-r9} /* copy from source address [r0] */ - stmia r1!, {r3-r9} /* copy to target address [r1] */ - cmp r0, r2 /* until source end addreee [r2] */ - ble copy_loop - - ldr pc, =1f /* Jump to SDRAM */ -1: - bl nand_boot /* Load barebox from NAND Flash */ - - ldr r1, =IMX_NFC_BASE - TEXT_BASE - sub r10, r10, r1 /* adjust return address from NFC SRAM */ - /* to SDRAM */ - -#endif /* CONFIG_NAND_IMX_BOOT */ - -ret: - mov pc,r10 - diff --git a/board/pcm038/pcm038.c b/board/pcm038/pcm038.c index 3c17036..fbd53a5 100644 --- a/board/pcm038/pcm038.c +++ b/board/pcm038/pcm038.c @@ -420,12 +420,3 @@ static int pcm038_power_init(void) late_initcall(pcm038_power_init); -#ifdef CONFIG_NAND_IMX_BOOT -void __bare_init nand_boot(void) -{ - PCCR1 |= PCCR1_NFC_BAUDEN; /* FIXME: Really needed? Probably not */ - - imx_nand_load_image((void *)TEXT_BASE, 256 * 1024); -} -#endif - -- 1.7.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox