diff options
Diffstat (limited to 'arch/arm/mach-uniphier/sbc/sbc-savepin.c')
| -rw-r--r-- | arch/arm/mach-uniphier/sbc/sbc-savepin.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/sbc/sbc-savepin.c b/arch/arm/mach-uniphier/sbc/sbc-savepin.c new file mode 100644 index 0000000000..41e9796664 --- /dev/null +++ b/arch/arm/mach-uniphier/sbc/sbc-savepin.c @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2011-2016 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <linux/io.h> + +#include "../init.h" +#include "sbc-regs.h" + +/* slower but LED works */ +#define SBCTRL0_SAVEPIN_PERI_VALUE 0x55450000 +#define SBCTRL1_SAVEPIN_PERI_VALUE 0x07168d00 +#define SBCTRL2_SAVEPIN_PERI_VALUE 0x34000009 +#define SBCTRL4_SAVEPIN_PERI_VALUE 0x02110110 + +/* faster but LED does not work */ +#define SBCTRL0_SAVEPIN_MEM_VALUE 0x55450000 +#define SBCTRL1_SAVEPIN_MEM_VALUE 0x06057700 +/* NOR flash needs more wait counts than SRAM */ +#define SBCTRL2_SAVEPIN_MEM_VALUE 0x34000009 +#define SBCTRL4_SAVEPIN_MEM_VALUE 0x02110210 + +int uniphier_sbc_init_savepin(const struct uniphier_board_data *bd) +{ + /* + * Only CS1 is connected to support card. + * BKSZ[1:0] should be set to "01". + */ + writel(SBCTRL0_SAVEPIN_PERI_VALUE, SBCTRL10); + writel(SBCTRL1_SAVEPIN_PERI_VALUE, SBCTRL11); + writel(SBCTRL2_SAVEPIN_PERI_VALUE, SBCTRL12); + writel(SBCTRL4_SAVEPIN_PERI_VALUE, SBCTRL14); + + if (boot_is_swapped()) { + /* + * Boot Swap On: boot from external NOR/SRAM + * 0x42000000-0x43ffffff is a mirror of 0x40000000-0x41ffffff. + * + * 0x40000000-0x41efffff, 0x42000000-0x43efffff: memory bank + * 0x41f00000-0x41ffffff, 0x43f00000-0x43ffffff: peripherals + */ + writel(0x0000bc01, SBBASE0); + } else { + /* + * Boot Swap Off: boot from mask ROM + * 0x40000000-0x41ffffff: mask ROM + * 0x42000000-0x43efffff: memory bank (31MB) + * 0x43f00000-0x43ffffff: peripherals (1MB) + */ + writel(0x0000be01, SBBASE0); /* dummy */ + writel(0x0200be01, SBBASE1); + } + + return 0; +} |