diff options
Diffstat (limited to 'arch/ppc/cpu/mpc86xx/speed.c')
| -rw-r--r-- | arch/ppc/cpu/mpc86xx/speed.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/arch/ppc/cpu/mpc86xx/speed.c b/arch/ppc/cpu/mpc86xx/speed.c deleted file mode 100644 index 64a3479..0000000 --- a/arch/ppc/cpu/mpc86xx/speed.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Copyright 2004 Freescale Semiconductor. - * Jeff Brown - * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) - * - * (C) Copyright 2000-2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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; either version 2 of - * the License, or (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <mpc86xx.h> -#include <asm/processor.h> -#include <asm/io.h> - -DECLARE_GLOBAL_DATA_PTR; - -/* used in some defintiions of CONFIG_SYS_CLK_FREQ */ -extern unsigned long get_board_sys_clk(unsigned long dummy); - -void get_sys_info(sys_info_t *sysInfo) -{ - volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; - volatile ccsr_gur_t *gur = &immap->im_gur; - uint plat_ratio, e600_ratio; - uint lcrr_div; - - plat_ratio = (gur->porpllsr) & 0x0000003e; - plat_ratio >>= 1; - - switch (plat_ratio) { - case 0x0: - sysInfo->freqSystemBus = 16 * CONFIG_SYS_CLK_FREQ; - break; - case 0x02: - case 0x03: - case 0x04: - case 0x05: - case 0x06: - case 0x08: - case 0x09: - case 0x0a: - case 0x0c: - case 0x10: - sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ; - break; - default: - sysInfo->freqSystemBus = 0; - break; - } - - e600_ratio = (gur->porpllsr) & 0x003f0000; - e600_ratio >>= 16; - - switch (e600_ratio) { - case 0x10: - sysInfo->freqProcessor = 2 * sysInfo->freqSystemBus; - break; - case 0x19: - sysInfo->freqProcessor = 5 * sysInfo->freqSystemBus / 2; - break; - case 0x20: - sysInfo->freqProcessor = 3 * sysInfo->freqSystemBus; - break; - case 0x39: - sysInfo->freqProcessor = 7 * sysInfo->freqSystemBus / 2; - break; - case 0x28: - sysInfo->freqProcessor = 4 * sysInfo->freqSystemBus; - break; - case 0x1d: - sysInfo->freqProcessor = 9 * sysInfo->freqSystemBus / 2; - break; - default: - sysInfo->freqProcessor = e600_ratio + sysInfo->freqSystemBus; - break; - } - -#if defined(CONFIG_SYS_LBC_LCRR) - /* We will program LCRR to this value later */ - lcrr_div = CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV; -#else - { - volatile ccsr_lbc_t *lbc = &immap->im_lbc; - lcrr_div = in_be32(&lbc->lcrr) & LCRR_CLKDIV; - } -#endif - if (lcrr_div == 2 || lcrr_div == 4 || lcrr_div == 8) { - sysInfo->freqLocalBus = sysInfo->freqSystemBus / (lcrr_div * 2); - } else { - /* In case anyone cares what the unknown value is */ - sysInfo->freqLocalBus = lcrr_div; - } -} - - -/* - * Measure CPU clock speed (core clock GCLK1, GCLK2) - * (Approx. GCLK frequency in Hz) - */ - -int get_clocks(void) -{ - sys_info_t sys_info; - - get_sys_info(&sys_info); - gd->cpu_clk = sys_info.freqProcessor; - gd->bus_clk = sys_info.freqSystemBus; - gd->lbc_clk = sys_info.freqLocalBus; - - /* - * The base clock for I2C depends on the actual SOC. Unfortunately, - * there is no pattern that can be used to determine the frequency, so - * the only choice is to look up the actual SOC number and use the value - * for that SOC. This information is taken from application note - * AN2919. - */ -#ifdef CONFIG_MPC8610 - gd->i2c1_clk = sys_info.freqSystemBus; -#else - gd->i2c1_clk = sys_info.freqSystemBus / 2; -#endif - gd->i2c2_clk = gd->i2c1_clk; - - if (gd->cpu_clk != 0) - return 0; - else - return 1; -} - - -/* - * get_bus_freq - * Return system bus freq in Hz - */ - -ulong get_bus_freq(ulong dummy) -{ - ulong val; - sys_info_t sys_info; - - get_sys_info(&sys_info); - val = sys_info.freqSystemBus; - - return val; -} |