diff options
| author | Tom Rini <trini@konsulko.com> | 2018-12-21 13:36:51 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-12-21 13:36:51 -0500 |
| commit | fd0135e3c54c391b6143f85440e30d576a9a83fe (patch) | |
| tree | 500ea3c4490f65e30c20e73e571f7982cd6f8c82 /arch/mips/mach-mscc/lowlevel_init_luton.S | |
| parent | 328e3f8a706931e1a8f76adfdc015ad76cbeb83c (diff) | |
| parent | 25c7de2255128743fcbe436b6f3b17a70d0cdd82 (diff) | |
Merge tag 'mips-updates-for-2019.11' of git://git.denx.de/u-boot-mips
- mips: fix some DTC warnings
- bmips: bcm6348: add DMA driver
- bmips: bcm5348: add ethernet driver
- bmips: bcm6368: add ethernet driver
- mips: mt76xx: fix DMA problems, disable CONFIG_OF_EMBED
- mips: mscc: add support for Microsemi Ocelot and Luton SoCs
- mips: mscc: add support for Ocelot and Luton evaluation boards
- mips: jz47xx: add basic support for Ingenic JZ4780 SoC
- mips: jz47xx: add support for Imgtec Creator CI20 board
Diffstat (limited to 'arch/mips/mach-mscc/lowlevel_init_luton.S')
| -rw-r--r-- | arch/mips/mach-mscc/lowlevel_init_luton.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/mips/mach-mscc/lowlevel_init_luton.S b/arch/mips/mach-mscc/lowlevel_init_luton.S new file mode 100644 index 0000000000..8a528fa83a --- /dev/null +++ b/arch/mips/mach-mscc/lowlevel_init_luton.S @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */ +/* + * Copyright (c) 2018 Microsemi Corporation + */ + +#include <asm/asm.h> +#include <asm/regdef.h> + +#define BASE_MACRO 0x600a0000 +#define REG_OFFSET(t, o) (t + (o*4)) +#define REG_MACRO(x) REG_OFFSET(BASE_MACRO, x) +#define BIT(nr) (1 << (nr)) + +#define MACRO_CTRL_PLL5G_STATUS_PLL5G_STATUS0 REG_MACRO(6) +#define MACRO_CTRL_PLL5G_STATUS_PLL5G_STATUS0_LOCK_STATUS BIT(0) +#define MACRO_CTRL_PLL5G_CFG_PLL5G_CFG2 REG_MACRO(2) +#define MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0 REG_MACRO(0) +#define MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0_CPU_CLK_DIV (0x3F << 6) +#define MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0_CPU_CLK_DIV_ENC(x) (x << 6) + + .set noreorder +LEAF(pll_init) + /* Make sure PLL is locked */ + lw v0, MACRO_CTRL_PLL5G_STATUS_PLL5G_STATUS0 + andi v1, v0, MACRO_CTRL_PLL5G_STATUS_PLL5G_STATUS0_LOCK_STATUS + bne v1, zero, 1f + nop + + /* Black magic from frontend */ + li v1, 0x00610400 + sw v1, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG2 + + li v1, 0x00610c00 + sw v1, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG2 + + li v1, 0x00610800 + sw v1, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG2 + + li v1, 0x00610000 + sw v1, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG2 + + /* Wait for lock */ +2: lw v0, MACRO_CTRL_PLL5G_STATUS_PLL5G_STATUS0 + andi v1, v0, MACRO_CTRL_PLL5G_STATUS_PLL5G_STATUS0_LOCK_STATUS + /* Keep looping if zero (no lock bit yet) */ + beq v1, zero, 2b + nop + + /* Setup PLL CPU clock divider for 416MHz */ +1: lw v0, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0 + + /* Keep reserved bits */ + li v1, ~MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0_CPU_CLK_DIV + and v0, v0, v1 + + /* Set code 6 ~ 416.66 MHz */ + ori v0, v0, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0_CPU_CLK_DIV_ENC(6) + + sw v0, MACRO_CTRL_PLL5G_CFG_PLL5G_CFG0 + jr ra + nop + END(pll_init) |