mirror of
https://github.com/AsahiLinux/u-boot
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362 lines
10 KiB
C
362 lines
10 KiB
C
/*
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* (C) Copyright 2000-2007
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <ppc4xx_enet.h>
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#include <asm/processor.h>
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#include <asm/gpio.h>
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#include <ppc4xx.h>
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#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
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DECLARE_GLOBAL_DATA_PTR;
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#endif
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#ifndef CONFIG_SYS_PLL_RECONFIG
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#define CONFIG_SYS_PLL_RECONFIG 0
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#endif
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void reconfigure_pll(u32 new_cpu_freq)
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{
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#if defined(CONFIG_440EPX)
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int reset_needed = 0;
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u32 reg, temp;
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u32 prbdv0, target_prbdv0, /* CLK_PRIMBD */
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fwdva, target_fwdva, fwdvb, target_fwdvb, /* CLK_PLLD */
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fbdv, target_fbdv, lfbdv, target_lfbdv,
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perdv0, target_perdv0, /* CLK_PERD */
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spcid0, target_spcid0; /* CLK_SPCID */
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/* Reconfigure clocks if necessary.
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* See PPC440EPx User's Manual, sections 8.2 and 14 */
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if (new_cpu_freq == 667) {
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target_prbdv0 = 2;
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target_fwdva = 2;
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target_fwdvb = 4;
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target_fbdv = 20;
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target_lfbdv = 1;
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target_perdv0 = 4;
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target_spcid0 = 4;
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mfcpr(clk_primbd, reg);
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temp = (reg & PRBDV_MASK) >> 24;
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prbdv0 = temp ? temp : 8;
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if (prbdv0 != target_prbdv0) {
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reg &= ~PRBDV_MASK;
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reg |= ((target_prbdv0 == 8 ? 0 : target_prbdv0) << 24);
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mtcpr(clk_primbd, reg);
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reset_needed = 1;
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}
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mfcpr(clk_plld, reg);
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temp = (reg & PLLD_FWDVA_MASK) >> 16;
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fwdva = temp ? temp : 16;
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temp = (reg & PLLD_FWDVB_MASK) >> 8;
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fwdvb = temp ? temp : 8;
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temp = (reg & PLLD_FBDV_MASK) >> 24;
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fbdv = temp ? temp : 32;
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temp = (reg & PLLD_LFBDV_MASK);
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lfbdv = temp ? temp : 64;
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if (fwdva != target_fwdva || fbdv != target_fbdv || lfbdv != target_lfbdv) {
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reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK |
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PLLD_FBDV_MASK | PLLD_LFBDV_MASK);
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reg |= ((target_fwdva == 16 ? 0 : target_fwdva) << 16) |
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((target_fwdvb == 8 ? 0 : target_fwdvb) << 8) |
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((target_fbdv == 32 ? 0 : target_fbdv) << 24) |
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(target_lfbdv == 64 ? 0 : target_lfbdv);
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mtcpr(clk_plld, reg);
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reset_needed = 1;
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}
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mfcpr(clk_perd, reg);
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perdv0 = (reg & CPR0_PERD_PERDV0_MASK) >> 24;
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if (perdv0 != target_perdv0) {
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reg &= ~CPR0_PERD_PERDV0_MASK;
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reg |= (target_perdv0 << 24);
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mtcpr(clk_perd, reg);
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reset_needed = 1;
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}
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mfcpr(clk_spcid, reg);
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temp = (reg & CPR0_SPCID_SPCIDV0_MASK) >> 24;
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spcid0 = temp ? temp : 4;
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if (spcid0 != target_spcid0) {
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reg &= ~CPR0_SPCID_SPCIDV0_MASK;
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reg |= ((target_spcid0 == 4 ? 0 : target_spcid0) << 24);
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mtcpr(clk_spcid, reg);
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reset_needed = 1;
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}
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/* Set reload inhibit so configuration will persist across
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* processor resets */
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mfcpr(clk_icfg, reg);
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reg &= ~CPR0_ICFG_RLI_MASK;
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reg |= 1 << 31;
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mtcpr(clk_icfg, reg);
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}
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/* Reset processor if configuration changed */
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if (reset_needed) {
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__asm__ __volatile__ ("sync; isync");
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mtspr(dbcr0, 0x20000000);
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}
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#endif
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}
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/*
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* Breath some life into the CPU...
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*
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* Reconfigure PLL if necessary,
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* set up the memory map,
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* initialize a bunch of registers
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*/
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void
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cpu_init_f (void)
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{
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#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX)
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u32 val;
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#endif
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reconfigure_pll(CONFIG_SYS_PLL_RECONFIG);
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#if (defined(CONFIG_405EP) || defined (CONFIG_405EX)) && !defined(CONFIG_SYS_4xx_GPIO_TABLE)
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/*
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* GPIO0 setup (select GPIO or alternate function)
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*/
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#if defined(CONFIG_SYS_GPIO0_OR)
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out32(GPIO0_OR, CONFIG_SYS_GPIO0_OR); /* set initial state of output pins */
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#endif
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#if defined(CONFIG_SYS_GPIO0_ODR)
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out32(GPIO0_ODR, CONFIG_SYS_GPIO0_ODR); /* open-drain select */
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#endif
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out32(GPIO0_OSRH, CONFIG_SYS_GPIO0_OSRH); /* output select */
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out32(GPIO0_OSRL, CONFIG_SYS_GPIO0_OSRL);
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out32(GPIO0_ISR1H, CONFIG_SYS_GPIO0_ISR1H); /* input select */
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out32(GPIO0_ISR1L, CONFIG_SYS_GPIO0_ISR1L);
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out32(GPIO0_TSRH, CONFIG_SYS_GPIO0_TSRH); /* three-state select */
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out32(GPIO0_TSRL, CONFIG_SYS_GPIO0_TSRL);
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#if defined(CONFIG_SYS_GPIO0_ISR2H)
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out32(GPIO0_ISR2H, CONFIG_SYS_GPIO0_ISR2H);
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out32(GPIO0_ISR2L, CONFIG_SYS_GPIO0_ISR2L);
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#endif
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#if defined (CONFIG_SYS_GPIO0_TCR)
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out32(GPIO0_TCR, CONFIG_SYS_GPIO0_TCR); /* enable output driver for outputs */
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#endif
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#endif /* CONFIG_405EP ... && !CONFIG_SYS_4xx_GPIO_TABLE */
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#if defined (CONFIG_405EP)
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/*
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* Set EMAC noise filter bits
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*/
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mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
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/*
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* Enable the internal PCI arbiter
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*/
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mtdcr(cpc0_pci, mfdcr(cpc0_pci) | CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN);
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#endif /* CONFIG_405EP */
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#if defined(CONFIG_SYS_4xx_GPIO_TABLE)
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gpio_set_chip_configuration();
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#endif /* CONFIG_SYS_4xx_GPIO_TABLE */
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/*
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* External Bus Controller (EBC) Setup
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*/
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#if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
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#if (defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
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defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
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defined(CONFIG_405EX) || defined(CONFIG_405))
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/*
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* Move the next instructions into icache, since these modify the flash
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* we are running from!
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*/
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asm volatile(" bl 0f" ::: "lr");
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asm volatile("0: mflr 3" ::: "r3");
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asm volatile(" addi 4, 0, 14" ::: "r4");
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asm volatile(" mtctr 4" ::: "ctr");
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asm volatile("1: icbt 0, 3");
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asm volatile(" addi 3, 3, 32" ::: "r3");
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asm volatile(" bdnz 1b" ::: "ctr", "cr0");
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asm volatile(" addis 3, 0, 0x0" ::: "r3");
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asm volatile(" ori 3, 3, 0xA000" ::: "r3");
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asm volatile(" mtctr 3" ::: "ctr");
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asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
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#endif
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mtebc(pb0ap, CONFIG_SYS_EBC_PB0AP);
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mtebc(pb0cr, CONFIG_SYS_EBC_PB0CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 1))
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mtebc(pb1ap, CONFIG_SYS_EBC_PB1AP);
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mtebc(pb1cr, CONFIG_SYS_EBC_PB1CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 2))
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mtebc(pb2ap, CONFIG_SYS_EBC_PB2AP);
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mtebc(pb2cr, CONFIG_SYS_EBC_PB2CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 3))
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mtebc(pb3ap, CONFIG_SYS_EBC_PB3AP);
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mtebc(pb3cr, CONFIG_SYS_EBC_PB3CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 4))
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mtebc(pb4ap, CONFIG_SYS_EBC_PB4AP);
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mtebc(pb4cr, CONFIG_SYS_EBC_PB4CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 5))
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mtebc(pb5ap, CONFIG_SYS_EBC_PB5AP);
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mtebc(pb5cr, CONFIG_SYS_EBC_PB5CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 6))
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mtebc(pb6ap, CONFIG_SYS_EBC_PB6AP);
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mtebc(pb6cr, CONFIG_SYS_EBC_PB6CR);
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#endif
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#if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 7))
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mtebc(pb7ap, CONFIG_SYS_EBC_PB7AP);
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mtebc(pb7cr, CONFIG_SYS_EBC_PB7CR);
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#endif
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#if defined (CONFIG_SYS_EBC_CFG)
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mtebc(EBC0_CFG, CONFIG_SYS_EBC_CFG);
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#endif
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#if defined(CONFIG_WATCHDOG)
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val = mfspr(tcr);
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#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
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val |= 0xb8000000; /* generate system reset after 1.34 seconds */
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#elif defined(CONFIG_440EPX)
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val |= 0xb0000000; /* generate system reset after 1.34 seconds */
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#else
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val |= 0xf0000000; /* generate system reset after 2.684 seconds */
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#endif
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#if defined(CONFIG_SYS_4xx_RESET_TYPE)
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val &= ~0x30000000; /* clear WRC bits */
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val |= CONFIG_SYS_4xx_RESET_TYPE << 28; /* set board specific WRC type */
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#endif
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mtspr(tcr, val);
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val = mfspr(tsr);
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val |= 0x80000000; /* enable watchdog timer */
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mtspr(tsr, val);
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reset_4xx_watchdog();
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#endif /* CONFIG_WATCHDOG */
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#if defined(CONFIG_440GX)
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/* Take the GX out of compatibility mode
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* Travis Sawyer, 9 Mar 2004
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* NOTE: 440gx user manual inconsistency here
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* Compatibility mode and Ethernet Clock select are not
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* correct in the manual
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*/
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mfsdr(sdr_mfr, val);
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val &= ~0x10000000;
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mtsdr(sdr_mfr,val);
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#endif /* CONFIG_440GX */
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#if defined(CONFIG_460EX)
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/*
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* Set SDR0_AHB_CFG[A2P_INCR4] (bit 24) and
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* clear SDR0_AHB_CFG[A2P_PROT2] (bit 25) for a new 460EX errata
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* regarding concurrent use of AHB USB OTG, USB 2.0 host and SATA
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*/
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mfsdr(SDR0_AHB_CFG, val);
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val |= 0x80;
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val &= ~0x40;
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mtsdr(SDR0_AHB_CFG, val);
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mfsdr(SDR0_USB2HOST_CFG, val);
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val &= ~0xf00;
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val |= 0x400;
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mtsdr(SDR0_USB2HOST_CFG, val);
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#endif /* CONFIG_460EX */
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#if defined(CONFIG_405EX) || \
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defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
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defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
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defined(CONFIG_460SX)
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/*
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* Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read
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*/
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mtdcr(plb0_acr, (mfdcr(plb0_acr) & ~plb0_acr_rdp_mask) |
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plb0_acr_rdp_4deep);
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mtdcr(plb1_acr, (mfdcr(plb1_acr) & ~plb1_acr_rdp_mask) |
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plb1_acr_rdp_4deep);
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#endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */
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}
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/*
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* initialize higher level parts of CPU like time base and timers
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*/
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int cpu_init_r (void)
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{
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#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
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bd_t *bd = gd->bd;
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unsigned long reg;
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#if defined(CONFIG_405GP)
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uint pvr = get_pvr();
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#endif
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/*
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* Write Ethernetaddress into on-chip register
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*/
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reg = 0x00000000;
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reg |= bd->bi_enetaddr[0]; /* set high address */
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reg = reg << 8;
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reg |= bd->bi_enetaddr[1];
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out32 (EMAC_IAH, reg);
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reg = 0x00000000;
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reg |= bd->bi_enetaddr[2]; /* set low address */
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reg = reg << 8;
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reg |= bd->bi_enetaddr[3];
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reg = reg << 8;
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reg |= bd->bi_enetaddr[4];
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reg = reg << 8;
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reg |= bd->bi_enetaddr[5];
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out32 (EMAC_IAL, reg);
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#if defined(CONFIG_405GP)
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/*
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* Set edge conditioning circuitry on PPC405GPr
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* for compatibility to existing PPC405GP designs.
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*/
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if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
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mtdcr(ecr, 0x60606000);
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}
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#endif /* defined(CONFIG_405GP) */
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#endif /* defined(CONFIG_405GP) || defined(CONFIG_405EP) */
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return (0);
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}
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