e1ccbb6549
The BCM47xx SoCs have a 8250 serial compatible console at address 0x18000300 and an other at 0x18000400. On most devices 0x18000300 is wired to some pins on the board, we should use that. This is the smae for the AI (bcma) and the SB (ssb) bus, this is some offset on the chip common core. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/5889/
114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
/*
|
|
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
|
|
* Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
|
|
* Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
|
|
*
|
|
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* 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.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/ssb/ssb_driver_chipcommon.h>
|
|
#include <linux/ssb/ssb_regs.h>
|
|
#include <linux/smp.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <bcm47xx.h>
|
|
#include <bcm47xx_board.h>
|
|
|
|
|
|
static char bcm47xx_system_type[20] = "Broadcom BCM47XX";
|
|
|
|
const char *get_system_type(void)
|
|
{
|
|
return bcm47xx_system_type;
|
|
}
|
|
|
|
__init void bcm47xx_set_system_type(u16 chip_id)
|
|
{
|
|
snprintf(bcm47xx_system_type, sizeof(bcm47xx_system_type),
|
|
(chip_id > 0x9999) ? "Broadcom BCM%d" :
|
|
"Broadcom BCM%04X",
|
|
chip_id);
|
|
}
|
|
|
|
static __init void prom_init_mem(void)
|
|
{
|
|
unsigned long mem;
|
|
unsigned long max;
|
|
unsigned long off;
|
|
struct cpuinfo_mips *c = ¤t_cpu_data;
|
|
|
|
/* Figure out memory size by finding aliases.
|
|
*
|
|
* We should theoretically use the mapping from CFE using cfe_enummem().
|
|
* However as the BCM47XX is mostly used on low-memory systems, we
|
|
* want to reuse the memory used by CFE (around 4MB). That means cfe_*
|
|
* functions stop to work at some point during the boot, we should only
|
|
* call them at the beginning of the boot.
|
|
*
|
|
* BCM47XX uses 128MB for addressing the ram, if the system contains
|
|
* less that that amount of ram it remaps the ram more often into the
|
|
* available space.
|
|
* Accessing memory after 128MB will cause an exception.
|
|
* max contains the biggest possible address supported by the platform.
|
|
* If the method wants to try something above we assume 128MB ram.
|
|
*/
|
|
off = (unsigned long)prom_init;
|
|
max = off | ((128 << 20) - 1);
|
|
for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
|
|
if ((off + mem) > max) {
|
|
mem = (128 << 20);
|
|
printk(KERN_DEBUG "assume 128MB RAM\n");
|
|
break;
|
|
}
|
|
if (!memcmp(prom_init, prom_init + mem, 32))
|
|
break;
|
|
}
|
|
|
|
/* Ignoring the last page when ddr size is 128M. Cached
|
|
* accesses to last page is causing the processor to prefetch
|
|
* using address above 128M stepping out of the ddr address
|
|
* space.
|
|
*/
|
|
if (c->cputype == CPU_74K && (mem == (128 << 20)))
|
|
mem -= 0x1000;
|
|
|
|
add_memory_region(0, mem, BOOT_MEM_RAM);
|
|
}
|
|
|
|
/*
|
|
* This is the first serial on the chip common core, it is at this position
|
|
* for sb (ssb) and ai (bcma) bus.
|
|
*/
|
|
#define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + SSB_CHIPCO_UART0_DATA)
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
prom_init_mem();
|
|
setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
}
|