Let's use the more appropriate udelay for the nand_spl. While we can't make use of u-boot's full udelay we can atl east use a for loop that won't get optimized away .Since we have the bus clock we can use the timebase to calculate wall time.
Looked at reusing the u-boot udelay functions but it pulls in a lot of code as well as depends on the gd struct and would require a lot of rework
Signed-off-by: Matthew McClintock msm@freescale.com --- v2: Change global bus_clk to use gd->bus_clk
nand_spl/board/freescale/common.c | 35 +++++++++++++++++++++ nand_spl/board/freescale/p1010rdb/Makefile | 6 +++- nand_spl/board/freescale/p1010rdb/nand_boot.c | 11 +++---- nand_spl/board/freescale/p1_p2_rdb_pc/Makefile | 6 +++- nand_spl/board/freescale/p1_p2_rdb_pc/nand_boot.c | 12 +++---- 5 files changed, 55 insertions(+), 15 deletions(-) create mode 100644 nand_spl/board/freescale/common.c
diff --git a/nand_spl/board/freescale/common.c b/nand_spl/board/freescale/common.c new file mode 100644 index 0000000..983fd2e --- /dev/null +++ b/nand_spl/board/freescale/common.c @@ -0,0 +1,35 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * Author: Matthew McClintock msm@freescale.com + * + * 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 <common.h> +#include <asm/processor.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + +void udelay(unsigned long usec) { + u32 ticks_per_usec = gd->bus_clk / (8 * 1000000); + u32 ticks = ticks_per_usec * usec; + u32 s = mfspr(SPRN_TBRL); + + while ((mfspr(SPRN_TBRL)-s) < ticks); +} diff --git a/nand_spl/board/freescale/p1010rdb/Makefile b/nand_spl/board/freescale/p1010rdb/Makefile index 8d240ea..cdbd492 100644 --- a/nand_spl/board/freescale/p1010rdb/Makefile +++ b/nand_spl/board/freescale/p1010rdb/Makefile @@ -39,7 +39,8 @@ CFLAGS += -DCONFIG_NAND_SPL
SOBJS = start.o resetvec.o ticks.o COBJS = cache.o cpu_init_early.o cpu_init_nand.o fsl_law.o law.o \ - nand_boot.o nand_boot_fsl_ifc.o ns16550.o tlb.o tlb_table.o + nand_boot.o nand_boot_fsl_ifc.o ns16550.o tlb.o tlb_table.o \ + ../common.o
SRCS := $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c)) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) @@ -123,6 +124,9 @@ ifneq ($(OBJTREE), $(SRCTREE)) $(obj)nand_boot.c: @rm -f $(obj)nand_boot.c ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $(obj)nand_boot.c +$(obj)../common.c: + @rm -f $(obj)../common.c + ln -s $(SRCTREE)/nand_spl/board/freescale/common.c $(obj)../common.c endif
######################################################################### diff --git a/nand_spl/board/freescale/p1010rdb/nand_boot.c b/nand_spl/board/freescale/p1010rdb/nand_boot.c index f5294d0..a075509 100644 --- a/nand_spl/board/freescale/p1010rdb/nand_boot.c +++ b/nand_spl/board/freescale/p1010rdb/nand_boot.c @@ -27,8 +27,9 @@ #include <asm/immap_85xx.h> #include <asm/fsl_ddr_sdram.h> #include <asm/fsl_law.h> +#include <asm/global_data.h>
-#define udelay(x) { int j; for (j = 0; j < x * 10000; j++) isync(); } +DECLARE_GLOBAL_DATA_PTR;
unsigned long ddr_freq_mhz;
@@ -82,8 +83,7 @@ void sdram_init(void) __raw_writel((CONFIG_SYS_DDR_CS0_BNDS >> 1) & 0x0fff0fff, &ddr->cs0_bnds); }
- /* mimic 500us delay, with busy isync() loop */ - udelay(100); + udelay(500);
/* Let the controller go */ out_be32(&ddr->sdram_cfg, in_be32(&ddr->sdram_cfg) | SDRAM_CFG_MEM_EN); @@ -94,20 +94,19 @@ void sdram_init(void) void board_init_f(ulong bootflag) { u32 plat_ratio, ddr_ratio; - unsigned long bus_clk; ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
/* initialize selected port with appropriate baud rate */ plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO; plat_ratio >>= 1; - bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio; + gd->bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio;
ddr_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO; ddr_ratio = ddr_ratio >> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT; ddr_freq_mhz = (CONFIG_SYS_CLK_FREQ * ddr_ratio) / 0x1000000;
NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1, - bus_clk / 16 / CONFIG_BAUDRATE); + gd->bus_clk / 16 / CONFIG_BAUDRATE);
puts("\nNAND boot... ");
diff --git a/nand_spl/board/freescale/p1_p2_rdb_pc/Makefile b/nand_spl/board/freescale/p1_p2_rdb_pc/Makefile index 475cc49..46cf709 100644 --- a/nand_spl/board/freescale/p1_p2_rdb_pc/Makefile +++ b/nand_spl/board/freescale/p1_p2_rdb_pc/Makefile @@ -39,7 +39,8 @@ CFLAGS += -DCONFIG_NAND_SPL
SOBJS = start.o resetvec.o COBJS = cache.o cpu_init_early.o cpu_init_nand.o fsl_law.o law.o \ - nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o + nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o \ + ../common.o
SRCS := $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c)) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) @@ -119,6 +120,9 @@ ifneq ($(OBJTREE), $(SRCTREE)) $(obj)nand_boot.c: @rm -f $(obj)nand_boot.c ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $(obj)nand_boot.c +$(obj)../common.c: + @rm -f $(obj)../common.c + ln -s $(SRCTREE)/nand_spl/board/freescale/common.c $(obj)../common.c endif
######################################################################### diff --git a/nand_spl/board/freescale/p1_p2_rdb_pc/nand_boot.c b/nand_spl/board/freescale/p1_p2_rdb_pc/nand_boot.c index b9796ea..fcff382 100644 --- a/nand_spl/board/freescale/p1_p2_rdb_pc/nand_boot.c +++ b/nand_spl/board/freescale/p1_p2_rdb_pc/nand_boot.c @@ -25,11 +25,9 @@ #include <nand.h> #include <asm/fsl_law.h> #include <asm/fsl_ddr_sdram.h> +#include <asm/global_data.h>
-#define udelay(x) {int i, j; \ - for (i = 0; i < x; i++) \ - for (j = 0; j < 10000; j++) \ - ; } +DECLARE_GLOBAL_DATA_PTR;
/* * Fixed sdram init -- doesn't use serial presence detect. @@ -76,7 +74,7 @@ void sdram_init(void)
void board_init_f(ulong bootflag) { - u32 plat_ratio, bus_clk; + u32 plat_ratio; ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR; #ifndef CONFIG_QE ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR); @@ -85,10 +83,10 @@ void board_init_f(ulong bootflag) /* initialize selected port with appropriate baud rate */ plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO; plat_ratio >>= 1; - bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio; + gd->bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio;
NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1, - bus_clk / 16 / CONFIG_BAUDRATE); + gd->bus_clk / 16 / CONFIG_BAUDRATE);
puts("\nNAND boot... ");