*
* (C) Copyright 2002 Scott McNutt <smcnutt@artesyncp.com>
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/immap_85xx.h>
#include <asm/fsl_pci.h>
-#include <asm/fsl_ddr_sdram.h>
+#include <fsl_ddr_sdram.h>
#include <asm/fsl_serdes.h>
#include <spd_sdram.h>
#include <netdev.h>
volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
volatile fsl_lbc_t *lbc = LBC_BASE_ADDR;
- uint clkdiv;
+ uint clkdiv, lbc_mhz, lcrr = CONFIG_SYS_LBC_LCRR;
sys_info_t sysinfo;
get_sys_info(&sysinfo);
- clkdiv = (in_be32(&lbc->lcrr) & LCRR_CLKDIV) * 2;
+
+ lbc_mhz = sysinfo.freq_localbus / 1000000;
+ clkdiv = sysinfo.freq_systembus / sysinfo.freq_localbus;
+
+ debug("LCRR=0x%x, CD=%d, MHz=%d\n", lcrr, clkdiv, lbc_mhz);
out_be32(&gur->lbiuiplldcr1, 0x00078080);
if (clkdiv == 16) {
out_be32(&gur->lbiuiplldcr0, 0x5c0f1bf0);
}
- setbits_be32(&lbc->lcrr, 0x00030000);
+ /*
+ * Local Bus Clock > 83.3 MHz. According to timing
+ * specifications set LCRR[EADC] to 2 delay cycles.
+ */
+ if (lbc_mhz > 83) {
+ lcrr &= ~LCRR_EADC;
+ lcrr |= LCRR_EADC_2;
+ }
+ /*
+ * According to MPC8548ERMAD Rev. 1.3, 13.3.1.16, 13-30
+ * disable PLL bypass for Local Bus Clock > 83 MHz.
+ */
+ if (lbc_mhz >= 66)
+ lcrr &= (~LCRR_DBYP); /* DLL Enabled */
+
+ else
+ lcrr |= LCRR_DBYP; /* DLL Bypass */
+
+ out_be32(&lbc->lcrr, lcrr);
asm("sync;isync;msync");
+ /*
+ * According to MPC8548ERMAD Rev.1.3 read back LCRR
+ * and terminate with isync
+ */
+ lcrr = in_be32(&lbc->lcrr);
+ asm ("isync;");
+
+ /* let DLL stabilize */
+ udelay(500);
+
out_be32(&lbc->ltesr, 0xffffffff); /* Clear LBC error IRQs */
out_be32(&lbc->lteir, 0xffffffff); /* Enable LBC error IRQs */
}