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stm32mp: use device sequence number in boot_instance variable

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Use the device sequence number in boot_instance variable
and no more the SDMMC instance provided by ROM code/TF-A.

After this patch we don't need to define the mmc alias in
device tree, for example:
  mmc0 = &sdmmc1;
  mmc1 = &sdmmc2;
  mmc2 = &sdmmc3;
to have a correct mapping between the ROM code boot device =
"${boot_device}${boot_instance}" and the MMC device in U-Boot.

With this patch the 'mmc0' device (used in mmc commands) is
always used when only one instance sdmmc is activated in device
tree, even if it is only the sdmmc2 or sdmmc3.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-07-06 17:19:45 +02:00
parent b18c3abdea
commit 3c1057c548
3 changed files with 46 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/arm/mach-stm32mp/cpu.c
View File

@ -483,6 +483,11 @@ static void setup_boot_mode(void)
STM32_UART7_BASE,
STM32_UART8_BASE
};
const u32 sdmmc_addr[] = {
STM32_SDMMC1_BASE,
STM32_SDMMC2_BASE,
STM32_SDMMC3_BASE
};
char cmd[60];
u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
u32 boot_mode =
@ -525,7 +530,16 @@ static void setup_boot_mode(void)
break;
case BOOT_FLASH_SD:
case BOOT_FLASH_EMMC:
sprintf(cmd, "%d", instance);
if (instance > ARRAY_SIZE(sdmmc_addr))
break;
/* search associated sdmmc node in devicetree */
sprintf(cmd, "mmc@%x", sdmmc_addr[instance]);
if (uclass_get_device_by_name(UCLASS_MMC, cmd, &dev)) {
printf("mmc%d = %s not found in device tree!\n",
instance, cmd);
break;
}
sprintf(cmd, "%d", dev_seq(dev));
env_set("boot_device", "mmc");
env_set("boot_instance", cmd);
break;

4
arch/arm/mach-stm32mp/include/mach/stm32.h
View File

@ -32,6 +32,10 @@
#define STM32_UART7_BASE 0x40018000
#define STM32_UART8_BASE 0x40019000
#define STM32_SDMMC1_BASE 0x58005000
#define STM32_SDMMC2_BASE 0x58007000
#define STM32_SDMMC3_BASE 0x48004000
#define STM32_SYSRAM_BASE 0x2FFC0000
#define STM32_SYSRAM_SIZE SZ_256K

35
board/st/stm32mp1/stm32mp1.c
View File

@ -841,6 +841,31 @@ const char *env_ext4_get_intf(void)
}
}
int mmc_get_boot(void)
{
struct udevice *dev;
u32 boot_mode = get_bootmode();
unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
char cmd[20];
const u32 sdmmc_addr[] = {
STM32_SDMMC1_BASE,
STM32_SDMMC2_BASE,
STM32_SDMMC3_BASE
};
if (instance > ARRAY_SIZE(sdmmc_addr))
return 0;
/* search associated sdmmc node in devicetree */
snprintf(cmd, sizeof(cmd), "mmc@%x", sdmmc_addr[instance]);
if (uclass_get_device_by_name(UCLASS_MMC, cmd, &dev)) {
log_err("mmc%d = %s not found in device tree!\n", instance, cmd);
return 0;
}
return dev_seq(dev);
};
const char *env_ext4_get_dev_part(void)
{
static char *const env_dev_part =
@ -854,22 +879,16 @@ const char *env_ext4_get_dev_part(void)
if (strlen(env_dev_part) > 0)
return env_dev_part;
u32 bootmode = get_bootmode();
return dev_part[(bootmode & TAMP_BOOT_INSTANCE_MASK) - 1];
return dev_part[mmc_get_boot()];
}
int mmc_get_env_dev(void)
{
u32 bootmode;
if (CONFIG_SYS_MMC_ENV_DEV >= 0)
return CONFIG_SYS_MMC_ENV_DEV;
bootmode = get_bootmode();
/* use boot instance to select the correct mmc device identifier */
return (bootmode & TAMP_BOOT_INSTANCE_MASK) - 1;
return mmc_get_boot();
}
#if defined(CONFIG_OF_BOARD_SETUP)