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/*-
* Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* NETLOGIC_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <mips/nlm/hal/mips-extns.h>
#include <mips/nlm/hal/haldefs.h>
#include <mips/nlm/hal/iomap.h>
#include <mips/nlm/hal/sys.h>
#include <mips/nlm/xlp.h>
uint32_t
xlp_get_cpu_frequency(int node, int core)
{
uint64_t sysbase = nlm_get_sys_regbase(node);
unsigned int pll_divf, pll_divr, dfs_div, ext_div;
unsigned int rstval, dfsval;
rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
dfsval = nlm_read_sys_reg(sysbase, SYS_CORE_DFS_DIV_VALUE);
pll_divf = ((rstval >> 10) & 0x7f) + 1;
pll_divr = ((rstval >> 8) & 0x3) + 1;
if (!nlm_is_xlp8xx_ax())
ext_div = ((rstval >> 30) & 0x3) + 1;
else
ext_div = 1;
dfs_div = ((dfsval >> (core << 2)) & 0xf) + 1;
return ((800000000ULL * pll_divf)/(3 * pll_divr * ext_div * dfs_div));
}
static u_int
nlm_get_device_frequency(uint64_t sysbase, int devtype)
{
uint32_t pllctrl, dfsdiv, spf, spr, div_val;
int extra_div;
pllctrl = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL);
if (devtype <= 7)
div_val = nlm_read_sys_reg(sysbase, SYS_DFS_DIV_VALUE0);
else {
devtype -= 8;
div_val = nlm_read_sys_reg(sysbase, SYS_DFS_DIV_VALUE1);
}
dfsdiv = ((div_val >> (devtype << 2)) & 0xf) + 1;
spf = (pllctrl >> 3 & 0x7f) + 1;
spr = (pllctrl >> 1 & 0x03) + 1;
if (devtype == DFS_DEVICE_NAE && !nlm_is_xlp8xx_ax())
extra_div = 2;
else
extra_div = 1;
return ((400 * spf) / (3 * extra_div * spr * dfsdiv));
}
int
nlm_set_device_frequency(int node, int devtype, int frequency)
{
uint64_t sysbase;
u_int cur_freq;
int dec_div;
sysbase = nlm_get_sys_regbase(node);
cur_freq = nlm_get_device_frequency(sysbase, devtype);
if (cur_freq < (frequency - 5))
dec_div = 1;
else
dec_div = 0;
for(;;) {
if ((cur_freq >= (frequency - 5)) && (cur_freq <= frequency))
break;
if (dec_div)
nlm_write_sys_reg(sysbase, SYS_DFS_DIV_DEC_CTRL,
(1 << devtype));
else
nlm_write_sys_reg(sysbase, SYS_DFS_DIV_INC_CTRL,
(1 << devtype));
cur_freq = nlm_get_device_frequency(sysbase, devtype);
}
return (nlm_get_device_frequency(sysbase, devtype));
}
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