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ARM: uniphier: support USB boot mode for ProXstream2 / PH1-LD6b SoC

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The USB boot code is too fat and complicated to be included in SPL
(at least for now).  So, it was implemented as a separate project
(what we call USB-loader).

The expected boot sequence is as follows:

  Boot ROM -> USB-loader -> SPL -> U-Boot proper

The USB-loader loads the SPL and U-Boot proper from a USB memory
onto the locked L2 cache.  Then, SPL needs to copy the U-Boot proper
to DRAM, so this mode looks like a NOR boot from the view of SPL.
However, we want to distinguish between (genuine) NOR boot and USB
boot in some places.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2016-02-02 21:11:31 +09:00
parent a89be270e7
commit fec4816387
4 changed files with 22 additions and 2 deletions
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8
arch/arm/mach-uniphier/board_late_init.c
View file

@ -11,6 +11,8 @@
#include <linux/io.h>
#include <../drivers/mtd/nand/denali.h>
#include "boot-mode/boot-device.h"
static void nand_denali_wp_disable(void)
{
#ifdef CONFIG_NAND_DENALI
@ -62,7 +64,7 @@ int board_late_init(void)
{
puts("MODE: ");
switch (spl_boot_device()) {
switch (spl_boot_device_raw()) {
case BOOT_DEVICE_MMC1:
printf("eMMC Boot\n");
setenv("bootmode", "emmcboot");
@ -76,6 +78,10 @@ int board_late_init(void)
printf("NOR Boot\n");
setenv("bootmode", "norboot");
break;
case BOOT_DEVICE_USB:
printf("USB Boot\n");
setenv("bootmode", "usbboot");
break;
default:
printf("Unsupported Boot Mode\n");
return -1;

2
arch/arm/mach-uniphier/boot-mode/boot-device.h
View file

@ -22,4 +22,6 @@ void ph1_ld4_boot_mode_show(void);
void ph1_pro5_boot_mode_show(void);
void proxstream2_boot_mode_show(void);
u32 spl_boot_device_raw(void);
#endif /* _ASM_BOOT_DEVICE_H_ */

3
arch/arm/mach-uniphier/boot-mode/boot-mode-proxstream2.c
View file

@ -55,6 +55,9 @@ u32 proxstream2_boot_device(void)
{
int boot_mode;
if (readl(SG_PINMON0) & BIT(6))
return BOOT_DEVICE_USB;
boot_mode = get_boot_mode_sel();
return boot_device_table[boot_mode].type;

11
arch/arm/mach-uniphier/boot-mode/boot-mode.c
View file

@ -11,7 +11,7 @@
#include "../soc-info.h"
#include "boot-device.h"
u32 spl_boot_device(void)
u32 spl_boot_device_raw(void)
{
if (boot_is_swapped())
return BOOT_DEVICE_NOR;
@ -43,3 +43,12 @@ u32 spl_boot_device(void)
return BOOT_DEVICE_NONE;
}
}
u32 spl_boot_device(void)
{
u32 ret;
ret = spl_boot_device_raw();
return ret == BOOT_DEVICE_USB ? BOOT_DEVICE_NOR : ret;
}