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/*
* (C) Copyright 2000-2007
* 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 <watchdog.h>
#include <ppc4xx_enet.h>
#include <asm/processor.h>
#include <asm/gpio.h>
#include <ppc4xx.h>
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
DECLARE_GLOBAL_DATA_PTR;
#endif
#ifndef CONFIG_SYS_PLL_RECONFIG
#define CONFIG_SYS_PLL_RECONFIG 0
#endif
void reconfigure_pll(u32 new_cpu_freq)
{
#if defined(CONFIG_440EPX)
int reset_needed = 0;
u32 reg, temp;
u32 prbdv0, target_prbdv0, /* CLK_PRIMBD */
fwdva, target_fwdva, fwdvb, target_fwdvb, /* CLK_PLLD */
fbdv, target_fbdv, lfbdv, target_lfbdv,
perdv0, target_perdv0, /* CLK_PERD */
spcid0, target_spcid0; /* CLK_SPCID */
/* Reconfigure clocks if necessary.
* See PPC440EPx User's Manual, sections 8.2 and 14 */
if (new_cpu_freq == 667) {
target_prbdv0 = 2;
target_fwdva = 2;
target_fwdvb = 4;
target_fbdv = 20;
target_lfbdv = 1;
target_perdv0 = 4;
target_spcid0 = 4;
mfcpr(clk_primbd, reg);
temp = (reg & PRBDV_MASK) >> 24;
prbdv0 = temp ? temp : 8;
if (prbdv0 != target_prbdv0) {
reg &= ~PRBDV_MASK;
reg |= ((target_prbdv0 == 8 ? 0 : target_prbdv0) << 24);
mtcpr(clk_primbd, reg);
reset_needed = 1;
}
mfcpr(clk_plld, reg);
temp = (reg & PLLD_FWDVA_MASK) >> 16;
fwdva = temp ? temp : 16;
temp = (reg & PLLD_FWDVB_MASK) >> 8;
fwdvb = temp ? temp : 8;
temp = (reg & PLLD_FBDV_MASK) >> 24;
fbdv = temp ? temp : 32;
temp = (reg & PLLD_LFBDV_MASK);
lfbdv = temp ? temp : 64;
if (fwdva != target_fwdva || fbdv != target_fbdv || lfbdv != target_lfbdv) {
reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK |
PLLD_FBDV_MASK | PLLD_LFBDV_MASK);
reg |= ((target_fwdva == 16 ? 0 : target_fwdva) << 16) |
((target_fwdvb == 8 ? 0 : target_fwdvb) << 8) |
((target_fbdv == 32 ? 0 : target_fbdv) << 24) |
(target_lfbdv == 64 ? 0 : target_lfbdv);
mtcpr(clk_plld, reg);
reset_needed = 1;
}
mfcpr(clk_perd, reg);
perdv0 = (reg & CPR0_PERD_PERDV0_MASK) >> 24;
if (perdv0 != target_perdv0) {
reg &= ~CPR0_PERD_PERDV0_MASK;
reg |= (target_perdv0 << 24);
mtcpr(clk_perd, reg);
reset_needed = 1;
}
mfcpr(clk_spcid, reg);
temp = (reg & CPR0_SPCID_SPCIDV0_MASK) >> 24;
spcid0 = temp ? temp : 4;
if (spcid0 != target_spcid0) {
reg &= ~CPR0_SPCID_SPCIDV0_MASK;
reg |= ((target_spcid0 == 4 ? 0 : target_spcid0) << 24);
mtcpr(clk_spcid, reg);
reset_needed = 1;
}
/* Set reload inhibit so configuration will persist across
* processor resets */
mfcpr(clk_icfg, reg);
reg &= ~CPR0_ICFG_RLI_MASK;
reg |= 1 << 31;
mtcpr(clk_icfg, reg);
}
/* Reset processor if configuration changed */
if (reset_needed) {
__asm__ __volatile__ ("sync; isync");
mtspr(SPRN_DBCR0, 0x20000000);
}
#endif
}
/*
* Breath some life into the CPU...
*
* Reconfigure PLL if necessary,
* set up the memory map,
* initialize a bunch of registers
*/
void
cpu_init_f (void)
{
#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX)
u32 val;
#endif
reconfigure_pll(CONFIG_SYS_PLL_RECONFIG);
#if (defined(CONFIG_405EP) || defined (CONFIG_405EX)) && !defined(CONFIG_SYS_4xx_GPIO_TABLE)
/*
* GPIO0 setup (select GPIO or alternate function)
*/
#if defined(CONFIG_SYS_GPIO0_OR)
out32(GPIO0_OR, CONFIG_SYS_GPIO0_OR); /* set initial state of output pins */
#endif
#if defined(CONFIG_SYS_GPIO0_ODR)
out32(GPIO0_ODR, CONFIG_SYS_GPIO0_ODR); /* open-drain select */
#endif
out32(GPIO0_OSRH, CONFIG_SYS_GPIO0_OSRH); /* output select */
out32(GPIO0_OSRL, CONFIG_SYS_GPIO0_OSRL);
out32(GPIO0_ISR1H, CONFIG_SYS_GPIO0_ISR1H); /* input select */
out32(GPIO0_ISR1L, CONFIG_SYS_GPIO0_ISR1L);
out32(GPIO0_TSRH, CONFIG_SYS_GPIO0_TSRH); /* three-state select */
out32(GPIO0_TSRL, CONFIG_SYS_GPIO0_TSRL);
#if defined(CONFIG_SYS_GPIO0_ISR2H)
out32(GPIO0_ISR2H, CONFIG_SYS_GPIO0_ISR2H);
out32(GPIO0_ISR2L, CONFIG_SYS_GPIO0_ISR2L);
#endif
#if defined (CONFIG_SYS_GPIO0_TCR)
out32(GPIO0_TCR, CONFIG_SYS_GPIO0_TCR); /* enable output driver for outputs */
#endif
#endif /* CONFIG_405EP ... && !CONFIG_SYS_4xx_GPIO_TABLE */
#if defined (CONFIG_405EP)
/*
* Set EMAC noise filter bits
*/
mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
#endif /* CONFIG_405EP */
#if defined(CONFIG_SYS_4xx_GPIO_TABLE)
gpio_set_chip_configuration();
#endif /* CONFIG_SYS_4xx_GPIO_TABLE */
/*
* External Bus Controller (EBC) Setup
*/
#if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
#if (defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
defined(CONFIG_405EX) || defined(CONFIG_405))
/*
* Move the next instructions into icache, since these modify the flash
* we are running from!
*/
asm volatile(" bl 0f" ::: "lr");
asm volatile("0: mflr 3" ::: "r3");
asm volatile(" addi 4, 0, 14" ::: "r4");
asm volatile(" mtctr 4" ::: "ctr");
asm volatile("1: icbt 0, 3");
asm volatile(" addi 3, 3, 32" ::: "r3");
asm volatile(" bdnz 1b" ::: "ctr", "cr0");
asm volatile(" addis 3, 0, 0x0" ::: "r3");
asm volatile(" ori 3, 3, 0xA000" ::: "r3");
asm volatile(" mtctr 3" ::: "ctr");
asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
#endif
mtebc(pb0ap, CONFIG_SYS_EBC_PB0AP);
mtebc(pb0cr, CONFIG_SYS_EBC_PB0CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 1))
mtebc(pb1ap, CONFIG_SYS_EBC_PB1AP);
mtebc(pb1cr, CONFIG_SYS_EBC_PB1CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 2))
mtebc(pb2ap, CONFIG_SYS_EBC_PB2AP);
mtebc(pb2cr, CONFIG_SYS_EBC_PB2CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 3))
mtebc(pb3ap, CONFIG_SYS_EBC_PB3AP);
mtebc(pb3cr, CONFIG_SYS_EBC_PB3CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 4))
mtebc(pb4ap, CONFIG_SYS_EBC_PB4AP);
mtebc(pb4cr, CONFIG_SYS_EBC_PB4CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 5))
mtebc(pb5ap, CONFIG_SYS_EBC_PB5AP);
mtebc(pb5cr, CONFIG_SYS_EBC_PB5CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 6))
mtebc(pb6ap, CONFIG_SYS_EBC_PB6AP);
mtebc(pb6cr, CONFIG_SYS_EBC_PB6CR);
#endif
#if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 7))
mtebc(pb7ap, CONFIG_SYS_EBC_PB7AP);
mtebc(pb7cr, CONFIG_SYS_EBC_PB7CR);
#endif
#if defined (CONFIG_SYS_EBC_CFG)
mtebc(EBC0_CFG, CONFIG_SYS_EBC_CFG);
#endif
#if defined(CONFIG_WATCHDOG)
val = mfspr(tcr);
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
val |= 0xb8000000; /* generate system reset after 1.34 seconds */
#elif defined(CONFIG_440EPX)
val |= 0xb0000000; /* generate system reset after 1.34 seconds */
#else
val |= 0xf0000000; /* generate system reset after 2.684 seconds */
#endif
#if defined(CONFIG_SYS_4xx_RESET_TYPE)
val &= ~0x30000000; /* clear WRC bits */
val |= CONFIG_SYS_4xx_RESET_TYPE << 28; /* set board specific WRC type */
#endif
mtspr(tcr, val);
val = mfspr(tsr);
val |= 0x80000000; /* enable watchdog timer */
mtspr(tsr, val);
reset_4xx_watchdog();
#endif /* CONFIG_WATCHDOG */
#if defined(CONFIG_440GX)
/* Take the GX out of compatibility mode
* Travis Sawyer, 9 Mar 2004
* NOTE: 440gx user manual inconsistency here
* Compatibility mode and Ethernet Clock select are not
* correct in the manual
*/
mfsdr(sdr_mfr, val);
val &= ~0x10000000;
mtsdr(sdr_mfr,val);
#endif /* CONFIG_440GX */
#if defined(CONFIG_460EX)
/*
* Set SDR0_AHB_CFG[A2P_INCR4] (bit 24) and
* clear SDR0_AHB_CFG[A2P_PROT2] (bit 25) for a new 460EX errata
* regarding concurrent use of AHB USB OTG, USB 2.0 host and SATA
*/
mfsdr(SDR0_AHB_CFG, val);
val |= 0x80;
val &= ~0x40;
mtsdr(SDR0_AHB_CFG, val);
mfsdr(SDR0_USB2HOST_CFG, val);
val &= ~0xf00;
val |= 0x400;
mtsdr(SDR0_USB2HOST_CFG, val);
#endif /* CONFIG_460EX */
#if defined(CONFIG_405EX) || \
defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
defined(CONFIG_460SX)
/*
* Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read
*/
mtdcr(plb0_acr, (mfdcr(plb0_acr) & ~plb0_acr_rdp_mask) |
plb0_acr_rdp_4deep);
mtdcr(plb1_acr, (mfdcr(plb1_acr) & ~plb1_acr_rdp_mask) |
plb1_acr_rdp_4deep);
#endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */
}
/*
* initialize higher level parts of CPU like time base and timers
*/
int cpu_init_r (void)
{
#if defined(CONFIG_405GP)
uint pvr = get_pvr();
/*
* Set edge conditioning circuitry on PPC405GPr
* for compatibility to existing PPC405GP designs.
*/
if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
mtdcr(ecr, 0x60606000);
}
#endif /* defined(CONFIG_405GP) */
return 0;
}
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