rockchip: back-to-bootrom: allow passing a cmd to the bootrom

The BROM supports forcing it to enter download-mode, if an appropriate
result/cmd-word is returned to it.  There already is a series to
support this in review, so this prepares the (newly C-version) of the
back-to-bootrom code to accept a cmd to passed on to the BROM.

All the existing call-sites are adjusted to match the changed function
signature.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Andy Yan <andy.yan@rock-chips.com>

arch/arm/include/asm/arch-rockchip/bootrom.h

@@ -24,6 +24,9 @@ extern u32 SAVE_SP_ADDR;
  * download mode, ...).
  *
  * This function does not return.
+ *
+ * @brom_cmd: indicates how the bootrom should continue the boot
+ *            sequence (e.g. load the next stage)
  */
 enum rockchip_bootrom_cmd {
 	/*
@@ -35,7 +38,7 @@ enum rockchip_bootrom_cmd {
 	BROM_BOOT_ENTER_DNL,      /* have BROM enter download-mode */
 };
 
-void back_to_bootrom(void);
+void back_to_bootrom(enum rockchip_bootrom_cmd brom_cmd);
 
 /**
  * Boot-device identifiers as used by the BROM

arch/arm/mach-rockchip/bootrom.c

@@ -15,12 +15,12 @@
  */
 static jmp_buf brom_ctx __section(".data");
 
-void back_to_bootrom(void)
+void back_to_bootrom(enum rockchip_bootrom_cmd brom_cmd)
 {
 #if CONFIG_IS_ENABLED(LIBCOMMON_SUPPORT)
 	puts("Returning to boot ROM...\n");
 #endif
-	longjmp(brom_ctx, BROM_BOOT_NEXTSTAGE);
+	longjmp(brom_ctx, brom_cmd);
 }
 
 /*

arch/arm/mach-rockchip/rk3036-board-spl.c

@@ -40,7 +40,7 @@ void board_init_f(ulong dummy)
 	sdram_init();
 
 	/* return to maskrom */
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 }
 
 /* Place Holders */

arch/arm/mach-rockchip/rk3188-board-spl.c

@@ -158,7 +158,7 @@ void board_init_f(ulong dummy)
 
 	setup_arm_clock();
 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 #endif
 }
 
@@ -219,7 +219,7 @@ void spl_board_init(void)
 
 	preloader_console_init();
 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 #endif
 	return;
 

arch/arm/mach-rockchip/rk322x-board-spl.c

@@ -76,6 +76,6 @@ void board_init_f(ulong dummy)
 	/* Disable the ddr secure region setting to make it non-secure */
 	rk_clrreg(SGRF_DDR_CON0, 0x4000);
 #if defined(CONFIG_ROCKCHIP_SPL_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 #endif
 }

arch/arm/mach-rockchip/rk3288-board-spl.c

@@ -216,7 +216,7 @@ void board_init_f(ulong dummy)
 #endif
 
 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 #endif
 }
 
@@ -283,7 +283,7 @@ void spl_board_init(void)
 
 	preloader_console_init();
 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 #endif
 	return;
 err:

arch/arm/mach-rockchip/rk3288-board-tpl.c

@@ -69,7 +69,7 @@ void board_init_f(ulong dummy)
 
 void board_return_to_bootrom(void)
 {
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 }
 
 u32 spl_boot_device(void)

arch/arm/mach-rockchip/rk3368-board-tpl.c

@@ -148,7 +148,7 @@ void board_init_f(ulong dummy)
 
 void board_return_to_bootrom(void)
 {
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 }
 
 u32 spl_boot_device(void)

arch/arm/mach-rockchip/rk3399-board-spl.c

@@ -23,7 +23,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 void board_return_to_bootrom(void)
 {
-	back_to_bootrom();
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 }
 
 static const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {