davidlt/kernel-ark
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
b24413180f
kernel-ark/arch/mips/bcm47xx/setup.c
Rafał Miłecki 2ab71a02c5 MIPS: BCM47xx: Move SPROM driver to drivers/firmware/ 
Broadcom ARM home routers store SPROM content in NVRAM just like MIPS
ones. To share SPROM code we need to move it out of arch/mips/ to some
common place. We already have bcm47xx_nvram in firmware path and SPROM
should fit there as well.
This driver is responsible for parsing SoC configuration data into a
struct shared between ssb and bcma buses.
This was tested with BCM4706 & BCM5357C0 (BCM47XX) and BCM4708A0
(ARCH_BCM_5301X).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12210/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-05-13 14:01:43 +02:00

250 lines
6.8 KiB
C
Raw Blame History

/*
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2006 Michael Buesch <m@bues.ch>
* Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
* 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 "bcm47xx_private.h"
#include <linux/bcm47xx_sprom.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
#include <asm/bootinfo.h>
#include <asm/idle.h>
#include <asm/prom.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <bcm47xx.h>
#include <bcm47xx_board.h>
union bcm47xx_bus bcm47xx_bus;
EXPORT_SYMBOL(bcm47xx_bus);
enum bcm47xx_bus_type bcm47xx_bus_type;
EXPORT_SYMBOL(bcm47xx_bus_type);
static void bcm47xx_machine_restart(char *command)
{
pr_alert("Please stand by while rebooting the system...\n");
local_irq_disable();
/* Set the watchdog timer to reset immediately */
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
if (bcm47xx_bus.ssb.chip_id == 0x4785)
write_c0_diag4(1 << 22);
ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
if (bcm47xx_bus.ssb.chip_id == 0x4785) {
__asm__ __volatile__(
".set\tmips3\n\t"
"sync\n\t"
"wait\n\t"
".set\tmips0");
}
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
break;
#endif
}
while (1)
cpu_relax();
}
static void bcm47xx_machine_halt(void)
{
/* Disable interrupts and watchdog and spin forever */
local_irq_disable();
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
break;
#endif
}
while (1)
cpu_relax();
}
#ifdef CONFIG_BCM47XX_SSB
static void __init bcm47xx_register_ssb(void)
{
int err;
char buf[100];
struct ssb_mipscore *mcore;
err = ssb_bus_host_soc_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE);
if (err)
panic("Failed to initialize SSB bus (err %d)", err);
mcore = &bcm47xx_bus.ssb.mipscore;
if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
if (strstr(buf, "console=ttyS1")) {
struct ssb_serial_port port;
pr_debug("Swapping serial ports!\n");
/* swap serial ports */
memcpy(&port, &mcore->serial_ports[0], sizeof(port));
memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
sizeof(port));
memcpy(&mcore->serial_ports[1], &port, sizeof(port));
}
}
}
#endif
#ifdef CONFIG_BCM47XX_BCMA
static void __init bcm47xx_register_bcma(void)
{
int err;
err = bcma_host_soc_register(&bcm47xx_bus.bcma);
if (err)
panic("Failed to register BCMA bus (err %d)", err);
}
#endif
/*
* Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
* to detect memory and record it with add_memory_region.
* Any extra initializaion performed here must not use kmalloc or bootmem.
*/
void __init plat_mem_setup(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
pr_info("Using bcma bus\n");
#ifdef CONFIG_BCM47XX_BCMA
bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
bcm47xx_register_bcma();
bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
#ifdef CONFIG_HIGHMEM
bcm47xx_prom_highmem_init();
#endif
#endif
} else {
pr_info("Using ssb bus\n");
#ifdef CONFIG_BCM47XX_SSB
bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
bcm47xx_sprom_register_fallbacks();
bcm47xx_register_ssb();
bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
#endif
}
_machine_restart = bcm47xx_machine_restart;
_machine_halt = bcm47xx_machine_halt;
pm_power_off = bcm47xx_machine_halt;
}
/*
* This finishes bus initialization doing things that were not possible without
* kmalloc. Make sure to call it late enough (after mm_init).
*/
void __init bcm47xx_bus_setup(void)
{
#ifdef CONFIG_BCM47XX_BCMA
if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
int err;
err = bcma_host_soc_init(&bcm47xx_bus.bcma);
if (err)
panic("Failed to initialize BCMA bus (err %d)", err);
}
#endif
/* With bus initialized we can access NVRAM and detect the board */
bcm47xx_board_detect();
mips_set_machine_name(bcm47xx_board_get_name());
}
static int __init bcm47xx_cpu_fixes(void)
{
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
/* Nothing to do */
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
/* The BCM4706 has a problem with the CPU wait instruction.
* When r4k_wait or r4k_wait_irqoff is used will just hang and
* not return from a msleep(). Removing the cpu_wait
* functionality is a workaround for this problem. The BCM4716
* does not have this problem.
*/
if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
cpu_wait = NULL;
break;
#endif
}
return 0;
}
arch_initcall(bcm47xx_cpu_fixes);
static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
.link = 1,
.speed = SPEED_100,
.duplex = DUPLEX_FULL,
};
static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
/* Nothing to do */
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
bcma_bus_register(&bcm47xx_bus.bcma.bus);
break;
#endif
}
bcm47xx_buttons_register();
bcm47xx_leds_register();
bcm47xx_workarounds();
fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status, -1);
return 0;
}
device_initcall(bcm47xx_register_bus_complete);
Reference in New Issue View Git Blame Copy Permalink