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rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / cpu / mpc512x / speed.c
1 /*
2 * (C) Copyright 2000-2007
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 *
25 * Based on the MPC83xx code.
26 */
27
28 #include <common.h>
29 #include <mpc512x.h>
30 #include <command.h>
31 #include <asm/processor.h>
32
33 DECLARE_GLOBAL_DATA_PTR;
34
35 static int spmf_mult[] = {
36 68, 1, 12, 16,
37 20, 24, 28, 32,
38 36, 40, 44, 48,
39 52, 56, 60, 64
40 };
41
42 static int cpmf_mult[][2] = {
43 {0, 1}, {0, 1}, /* 0 and 1 are not valid */
44 {1, 1}, {3, 2},
45 {2, 1}, {5, 2},
46 {3, 1}, {7, 2},
47 {0, 1}, {0, 1}, /* and all above 7 are not valid too */
48 {0, 1}, {0, 1},
49 {0, 1}, {0, 1},
50 {0, 1}, {0, 1}
51 };
52
53 static int sys_dividors[][2] = {
54 {2, 1}, {5, 2}, {3, 1}, {7, 2}, {4, 1},
55 {9, 2}, {5, 1}, {7, 1}, {6, 1}, {8, 1},
56 {9, 1}, {11, 1}, {10, 1}, {12, 1}, {13, 1},
57 {15, 1}, {14, 1}, {16, 1}, {17, 1}, {19, 1},
58 {18, 1}, {20, 1}, {21, 1}, {23, 1}, {22, 1},
59 {24, 1}, {25, 1}, {27, 1}, {26, 1}, {28, 1},
60 {29, 1}, {31, 1}, {30, 1}, {32, 1}, {33, 1}
61 };
62
63 int get_clocks (void)
64 {
65 volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
66 u8 spmf;
67 u8 cpmf;
68 u8 sys_div;
69 u8 ips_div;
70 u8 pci_div;
71 u32 ref_clk = CONFIG_SYS_MPC512X_CLKIN;
72 u32 spll;
73 u32 sys_clk;
74 u32 core_clk;
75 u32 csb_clk;
76 u32 ips_clk;
77 u32 pci_clk;
78
79 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32) im)
80 return -1;
81
82 spmf = (im->clk.spmr & SPMR_SPMF) >> SPMR_SPMF_SHIFT;
83 spll = ref_clk * spmf_mult[spmf];
84
85 sys_div = (im->clk.scfr[1] & SCFR2_SYS_DIV) >> SCFR2_SYS_DIV_SHIFT;
86 sys_clk = (spll * sys_dividors[sys_div][1]) / sys_dividors[sys_div][0];
87
88 csb_clk = sys_clk / 2;
89
90 cpmf = (im->clk.spmr & SPMR_CPMF) >> SPMR_CPMF_SHIFT;
91 core_clk = (csb_clk * cpmf_mult[cpmf][0]) / cpmf_mult[cpmf][1];
92
93 ips_div = (im->clk.scfr[0] & SCFR1_IPS_DIV_MASK) >> SCFR1_IPS_DIV_SHIFT;
94 if (ips_div != 0) {
95 ips_clk = csb_clk / ips_div;
96 } else {
97 /* in case we cannot get a sane IPS divisor, fail gracefully */
98 ips_clk = 0;
99 }
100 pci_div = (im->clk.scfr[0] & SCFR1_PCI_DIV_MASK) >> SCFR1_PCI_DIV_SHIFT;
101 if (pci_div != 0) {
102 pci_clk = csb_clk / pci_div;
103 } else {
104 /* in case we cannot get a sane IPS divisor, fail gracefully */
105 pci_clk = 333333;
106 }
107
108 gd->ips_clk = ips_clk;
109 gd->pci_clk = pci_clk;
110 gd->csb_clk = csb_clk;
111 gd->cpu_clk = core_clk;
112 gd->bus_clk = csb_clk;
113 return 0;
114
115 }
116
117 /********************************************
118 * get_bus_freq
119 * return system bus freq in Hz
120 *********************************************/
121 ulong get_bus_freq (ulong dummy)
122 {
123 return gd->csb_clk;
124 }
125
126 int do_clocks (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
127 {
128 printf("Clock configuration:\n");
129 printf(" CPU: %4ld MHz\n", gd->cpu_clk / 1000000);
130 printf(" Coherent System Bus: %4d MHz\n", gd->csb_clk / 1000000);
131 printf(" IPS Bus: %4d MHz\n", gd->ips_clk / 1000000);
132 printf(" PCI: %4d MHz\n", gd->pci_clk / 1000000);
133 printf(" DDR: %4d MHz\n", 2 * gd->csb_clk / 1000000);
134 return 0;
135 }
136
137 U_BOOT_CMD(clocks, 1, 0, do_clocks,
138 "clocks - print clock configuration\n",
139 " clocks\n"
140 );
141
142 int prt_mpc512x_clks (void)
143 {
144 do_clocks (NULL, 0, 0, NULL);
145 return (0);
146 }