1 /*-
2 * Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights
3 * reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26 * THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * NETLOGIC_BSD */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: stable/10/sys/mips/nlm/hal/nlm_hal.c 255368 2013-09-07 18:26:16Z jchandra $");
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/systm.h>
35
36 #include <mips/nlm/hal/mips-extns.h>
37 #include <mips/nlm/hal/haldefs.h>
38 #include <mips/nlm/hal/iomap.h>
39 #include <mips/nlm/hal/sys.h>
40 #include <mips/nlm/xlp.h>
41
42 uint32_t
xlp_get_cpu_frequency(int node,int core)43 xlp_get_cpu_frequency(int node, int core)
44 {
45 uint64_t sysbase = nlm_get_sys_regbase(node);
46 unsigned int pll_divf, pll_divr, dfs_div, ext_div;
47 unsigned int rstval, dfsval;
48
49 rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
50 dfsval = nlm_read_sys_reg(sysbase, SYS_CORE_DFS_DIV_VALUE);
51 pll_divf = ((rstval >> 10) & 0x7f) + 1;
52 pll_divr = ((rstval >> 8) & 0x3) + 1;
53 if (!nlm_is_xlp8xx_ax())
54 ext_div = ((rstval >> 30) & 0x3) + 1;
55 else
56 ext_div = 1;
57 dfs_div = ((dfsval >> (core << 2)) & 0xf) + 1;
58
59 return ((800000000ULL * pll_divf)/(3 * pll_divr * ext_div * dfs_div));
60 }
61
62 static u_int
nlm_get_device_frequency(uint64_t sysbase,int devtype)63 nlm_get_device_frequency(uint64_t sysbase, int devtype)
64 {
65 uint32_t pllctrl, dfsdiv, spf, spr, div_val;
66 int extra_div;
67
68 pllctrl = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL);
69 if (devtype <= 7)
70 div_val = nlm_read_sys_reg(sysbase, SYS_DFS_DIV_VALUE0);
71 else {
72 devtype -= 8;
73 div_val = nlm_read_sys_reg(sysbase, SYS_DFS_DIV_VALUE1);
74 }
75 dfsdiv = ((div_val >> (devtype << 2)) & 0xf) + 1;
76 spf = (pllctrl >> 3 & 0x7f) + 1;
77 spr = (pllctrl >> 1 & 0x03) + 1;
78 if (devtype == DFS_DEVICE_NAE && !nlm_is_xlp8xx_ax())
79 extra_div = 2;
80 else
81 extra_div = 1;
82
83 return ((400 * spf) / (3 * extra_div * spr * dfsdiv));
84 }
85
86 int
nlm_set_device_frequency(int node,int devtype,int frequency)87 nlm_set_device_frequency(int node, int devtype, int frequency)
88 {
89 uint64_t sysbase;
90 u_int cur_freq;
91 int dec_div;
92
93 sysbase = nlm_get_sys_regbase(node);
94 cur_freq = nlm_get_device_frequency(sysbase, devtype);
95 if (cur_freq < (frequency - 5))
96 dec_div = 1;
97 else
98 dec_div = 0;
99
100 for(;;) {
101 if ((cur_freq >= (frequency - 5)) && (cur_freq <= frequency))
102 break;
103 if (dec_div)
104 nlm_write_sys_reg(sysbase, SYS_DFS_DIV_DEC_CTRL,
105 (1 << devtype));
106 else
107 nlm_write_sys_reg(sysbase, SYS_DFS_DIV_INC_CTRL,
108 (1 << devtype));
109 cur_freq = nlm_get_device_frequency(sysbase, devtype);
110 }
111 return (nlm_get_device_frequency(sysbase, devtype));
112 }
113