mirror of
https://github.com/AsahiLinux/u-boot
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277 lines
6.1 KiB
C
277 lines
6.1 KiB
C
/*
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* Copyright 2004 Freescale Semiconductor, Inc.
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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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* Change log:
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*
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* 20050101: Eran Liberty (liberty@freescale.com)
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* Initial file creating (porting from 85XX & 8260)
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*/
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/*
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* CPU specific code for the MPC83xx family.
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*
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* Derived from the MPC8260 and MPC85xx.
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <mpc83xx.h>
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#include <ft_build.h>
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#include <asm/processor.h>
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DECLARE_GLOBAL_DATA_PTR;
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int checkcpu(void)
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{
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ulong clock = gd->cpu_clk;
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u32 pvr = get_pvr();
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char buf[32];
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if ((pvr & 0xFFFF0000) != PVR_83xx) {
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puts("Not MPC83xx Family!!!\n");
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return -1;
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}
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puts("CPU: MPC83xx, ");
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switch(pvr) {
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case PVR_8349_REV10:
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break;
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case PVR_8349_REV11:
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break;
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default:
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puts("Rev: Unknown\n");
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return -1; /* Not sure what this is */
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}
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printf("Rev: %d.%d at %s MHz\n", (pvr & 0xf0) >> 4,
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(pvr & 0x0f), strmhz(buf, clock));
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return 0;
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}
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void upmconfig (uint upm, uint *table, uint size)
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{
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hang(); /* FIXME: upconfig() needed? */
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}
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int
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do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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{
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ulong msr;
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#ifndef MPC83xx_RESET
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ulong addr;
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#endif
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volatile immap_t *immap = (immap_t *) CFG_IMMRBAR;
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#ifdef MPC83xx_RESET
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/* Interrupts and MMU off */
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__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
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msr &= ~( MSR_EE | MSR_IR | MSR_DR);
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__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
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/* enable Reset Control Reg */
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immap->reset.rpr = 0x52535445;
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("isync");
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/* confirm Reset Control Reg is enabled */
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while(!((immap->reset.rcer) & RCER_CRE));
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printf("Resetting the board.");
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printf("\n");
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udelay(200);
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/* perform reset, only one bit */
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immap->reset.rcr = RCR_SWHR;
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#else /* ! MPC83xx_RESET */
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immap->reset.rmr = RMR_CSRE; /* Checkstop Reset enable */
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/* Interrupts and MMU off */
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__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
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msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
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__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
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/*
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* Trying to execute the next instruction at a non-existing address
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* should cause a machine check, resulting in reset
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*/
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addr = CFG_RESET_ADDRESS;
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printf("resetting the board.");
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printf("\n");
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((void (*)(void)) addr) ();
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#endif /* MPC83xx_RESET */
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return 1;
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}
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/*
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* Get timebase clock frequency (like cpu_clk in Hz)
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*/
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unsigned long get_tbclk(void)
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{
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ulong tbclk;
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tbclk = (gd->bus_clk + 3L) / 4L;
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return tbclk;
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}
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#if defined(CONFIG_WATCHDOG)
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void watchdog_reset (void)
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{
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hang(); /* FIXME: implement watchdog_reset()? */
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}
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#endif /* CONFIG_WATCHDOG */
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#if defined(CONFIG_OF_FLAT_TREE)
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void
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ft_cpu_setup(void *blob, bd_t *bd)
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{
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u32 *p;
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int len;
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ulong clock;
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clock = bd->bi_busfreq;
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p = ft_get_prop(blob, "/cpus/" OF_CPU "/bus-frequency", &len);
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if (p != NULL)
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*p = cpu_to_be32(clock);
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p = ft_get_prop(blob, "/" OF_SOC "/bus-frequency", &len);
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if (p != NULL)
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*p = cpu_to_be32(clock);
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p = ft_get_prop(blob, "/" OF_SOC "/serial@4500/clock-frequency", &len);
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if (p != NULL)
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*p = cpu_to_be32(clock);
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p = ft_get_prop(blob, "/" OF_SOC "/serial@4600/clock-frequency", &len);
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if (p != NULL)
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*p = cpu_to_be32(clock);
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#ifdef CONFIG_MPC83XX_TSEC1
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p = ft_get_prop(blob, "/" OF_SOC "/ethernet@24000/address", &len);
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memcpy(p, bd->bi_enetaddr, 6);
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#endif
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#ifdef CONFIG_MPC83XX_TSEC2
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p = ft_get_prop(blob, "/" OF_SOC "/ethernet@25000/address", &len);
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memcpy(p, bd->bi_enet1addr, 6);
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#endif
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}
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#endif
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#if defined(CONFIG_DDR_ECC)
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void dma_init(void)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
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volatile dma8349_t *dma = &immap->dma;
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volatile u32 status = swab32(dma->dmasr0);
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volatile u32 dmamr0 = swab32(dma->dmamr0);
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debug("DMA-init\n");
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/* initialize DMASARn, DMADAR and DMAABCRn */
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dma->dmadar0 = (u32)0;
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dma->dmasar0 = (u32)0;
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dma->dmabcr0 = 0;
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("isync");
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/* clear CS bit */
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dmamr0 &= ~DMA_CHANNEL_START;
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dma->dmamr0 = swab32(dmamr0);
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("isync");
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/* while the channel is busy, spin */
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while(status & DMA_CHANNEL_BUSY) {
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status = swab32(dma->dmasr0);
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}
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debug("DMA-init end\n");
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}
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uint dma_check(void)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
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volatile dma8349_t *dma = &immap->dma;
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volatile u32 status = swab32(dma->dmasr0);
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volatile u32 byte_count = swab32(dma->dmabcr0);
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/* while the channel is busy, spin */
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while (status & DMA_CHANNEL_BUSY) {
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status = swab32(dma->dmasr0);
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}
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if (status & DMA_CHANNEL_TRANSFER_ERROR) {
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printf ("DMA Error: status = %x @ %d\n", status, byte_count);
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}
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return status;
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}
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int dma_xfer(void *dest, u32 count, void *src)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
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volatile dma8349_t *dma = &immap->dma;
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volatile u32 dmamr0;
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/* initialize DMASARn, DMADAR and DMAABCRn */
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dma->dmadar0 = swab32((u32)dest);
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dma->dmasar0 = swab32((u32)src);
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dma->dmabcr0 = swab32(count);
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("isync");
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/* init direct transfer, clear CS bit */
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dmamr0 = (DMA_CHANNEL_TRANSFER_MODE_DIRECT |
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DMA_CHANNEL_SOURCE_ADDRESS_HOLD_8B |
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DMA_CHANNEL_SOURCE_ADRESSS_HOLD_EN);
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dma->dmamr0 = swab32(dmamr0);
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("isync");
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/* set CS to start DMA transfer */
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dmamr0 |= DMA_CHANNEL_START;
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dma->dmamr0 = swab32(dmamr0);
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("isync");
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return ((int)dma_check());
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}
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#endif /*CONFIG_DDR_ECC*/
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