upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/cpu/mpc83xx/cpu.c

277 lines
6.1 KiB

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