- adds reading FMC swap setting from DTB to SDRAM driver - sets FMC swap for stm32f429-disco board - changes ram start address to 0x90000000
Signed-off-by: Radoslaw Pietrzyk radoslaw.pietrzyk@gmail.com --- arch/arm/dts/stm32f429-disco-u-boot.dtsi | 2 ++ drivers/ram/stm32_sdram.c | 37 +++++++++++++++++++++----------- include/configs/stm32f429-discovery.h | 6 +++--- 3 files changed, 29 insertions(+), 16 deletions(-)
diff --git a/arch/arm/dts/stm32f429-disco-u-boot.dtsi b/arch/arm/dts/stm32f429-disco-u-boot.dtsi index 8a0f642..10e0950 100644 --- a/arch/arm/dts/stm32f429-disco-u-boot.dtsi +++ b/arch/arm/dts/stm32f429-disco-u-boot.dtsi @@ -37,6 +37,8 @@ clocks = <&rcc 0 STM32F4_AHB3_CLOCK(FMC)>; pinctrl-0 = <&fmc_pins>; pinctrl-names = "default"; + st,syscfg = <&syscfg>; + st,swp_fmc = <1>; u-boot,dm-pre-reloc;
/* diff --git a/drivers/ram/stm32_sdram.c b/drivers/ram/stm32_sdram.c index dc39f33..eed3a22 100644 --- a/drivers/ram/stm32_sdram.c +++ b/drivers/ram/stm32_sdram.c @@ -11,6 +11,8 @@ #include <asm/io.h>
#define MEM_MODE_MASK GENMASK(2, 0) +#define SWP_FMC_OFFSET 10 +#define SWP_FMC_MASK GENMASK(SWP_FMC_OFFSET+1, SWP_FMC_OFFSET) #define NOT_FOUND 0xff
struct stm32_fmc_regs { @@ -256,27 +258,36 @@ static int stm32_fmc_ofdata_to_platdata(struct udevice *dev) struct ofnode_phandle_args args; u32 *syscfg_base; u32 mem_remap; + u32 swp_fmc; ofnode bank_node; char *bank_name; u8 bank = 0; int ret;
- mem_remap = dev_read_u32_default(dev, "st,mem_remap", NOT_FOUND); - if (mem_remap != NOT_FOUND) { - ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, + ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, &args); - if (ret) { - debug("%s: can't find syscon device (%d)\n", __func__, - ret); - return ret; - } - + if (ret) { + debug("%s: can't find syscon device (%d)\n", __func__, ret); + } else { syscfg_base = (u32 *)ofnode_get_addr(args.node);
- /* set memory mapping selection */ - clrsetbits_le32(syscfg_base, MEM_MODE_MASK, mem_remap); - } else { - debug("%s: cannot find st,mem_remap property\n", __func__); + mem_remap = dev_read_u32_default(dev, "st,mem_remap", NOT_FOUND); + if (mem_remap != NOT_FOUND) { + /* set memory mapping selection */ + clrsetbits_le32(syscfg_base, MEM_MODE_MASK, mem_remap); + } else { + debug("%s: cannot find st,mem_remap property\n", __func__); + } + + swp_fmc = dev_read_u32_default(dev, "st,swp_fmc", NOT_FOUND); + if (swp_fmc != NOT_FOUND) { + /* set fmc swapping selection */ + clrsetbits_le32(syscfg_base, SWP_FMC_MASK, swp_fmc << SWP_FMC_OFFSET); + } else { + debug("%s: cannot find st,swp_fmc property\n", __func__); + } + + debug("syscfg %x = %x\n", (u32)syscfg_base, *syscfg_base); }
dev_for_each_subnode(bank_node, dev) { diff --git a/include/configs/stm32f429-discovery.h b/include/configs/stm32f429-discovery.h index 4fd9c23..46eda1d 100644 --- a/include/configs/stm32f429-discovery.h +++ b/include/configs/stm32f429-discovery.h @@ -22,10 +22,10 @@ #define CONFIG_NR_DRAM_BANKS 1 #define CONFIG_SYS_RAM_CS 1 #define CONFIG_SYS_RAM_FREQ_DIV 2 -#define CONFIG_SYS_RAM_BASE 0xD0000000 +#define CONFIG_SYS_RAM_BASE 0x90000000 #define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_RAM_BASE -#define CONFIG_SYS_LOAD_ADDR 0xD0400000 -#define CONFIG_LOADADDR 0xD0400000 +#define CONFIG_SYS_LOAD_ADDR 0x90400000 +#define CONFIG_LOADADDR 0x90400000
#define CONFIG_SYS_MAX_FLASH_SECT 12 #define CONFIG_SYS_MAX_FLASH_BANKS 2