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/*
* This file is part of the coreboot project.
*
* Copyright 2018 Facebook, Inc.
* Copyright 2003-2017 Cavium Inc. <support@cavium.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <soc/clock.h>
#include <device/mmio.h>
#include <soc/addressmap.h>
#define PLL_REF_CLK 50000000 /* 50 MHz */
union cavm_rst_boot {
u64 u;
struct {
u64 rboot_pin:1;
u64 rboot:1;
u64 lboot:10;
u64 lboot_ext23:6;
u64 lboot_ext45:6;
u64 reserved_24_29:6;
u64 lboot_oci:3;
u64 pnr_mul:6;
u64 reserved_39_39:1;
u64 c_mul:7;
u64 reserved_47_54:8;
u64 dis_scan:1;
u64 dis_huk:1;
u64 vrm_err:1;
u64 jt_tstmode:1;
u64 ckill_ppdis:1;
u64 trusted_mode:1;
u64 ejtagdis:1;
u64 jtcsrdis:1;
u64 chipkill:1;
} s;
};
/**
* Returns the reference clock speed in Hz
*/
u64 thunderx_get_ref_clock(void)
{
return PLL_REF_CLK;
}
/**
* Returns the I/O clock speed in Hz
*/
u64 thunderx_get_io_clock(void)
{
union cavm_rst_boot rst_boot;
rst_boot.u = read64((void *)RST_PF_BAR0);
return ((u64)rst_boot.s.pnr_mul) * PLL_REF_CLK;
}
/**
* Returns the core clock speed in Hz
*/
u64 thunderx_get_core_clock(void)
{
union cavm_rst_boot rst_boot;
rst_boot.u = read64((void *)RST_PF_BAR0);
return ((u64)rst_boot.s.c_mul) * PLL_REF_CLK;
}
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