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27e96c3c29
I noticed my wrt350n would not reliably reboot after entering the reboot command. I found this code in the source for the wrt600n. It corrects the problem, and the wrt350n reboots reliably now. Signed-off-by: Ben Pfountz <netprince (at) vt (dot) edu> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11470 3c298f89-4303-0410-b956-a3cf2f4a3e73
254 lines
6.3 KiB
C
254 lines
6.3 KiB
C
/*
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* Generic setup routines for Broadcom MIPS boards
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*
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* Copyright (C) 2005 Felix Fietkau <nbd@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Copyright 2005, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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*/
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/serialP.h>
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#include <linux/ide.h>
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#include <asm/bootinfo.h>
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#include <asm/cpu.h>
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#include <asm/time.h>
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#include <asm/reboot.h>
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#include <typedefs.h>
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#include <osl.h>
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#include <sbutils.h>
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#include <bcmnvram.h>
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#include <bcmdevs.h>
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#include <sbhndmips.h>
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#include <hndmips.h>
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#include <trxhdr.h>
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/* Virtual IRQ base, after last hw IRQ */
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#define SBMIPS_VIRTIRQ_BASE 6
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/* # IRQs, hw and sw IRQs */
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#define SBMIPS_NUMIRQS 8
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/* Global SB handle */
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sb_t *bcm947xx_sbh = NULL;
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spinlock_t bcm947xx_sbh_lock = SPIN_LOCK_UNLOCKED;
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/* Convenience */
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#define sbh bcm947xx_sbh
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#define sbh_lock bcm947xx_sbh_lock
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extern void bcm947xx_time_init(void);
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extern void bcm947xx_timer_setup(struct irqaction *irq);
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#ifdef CONFIG_REMOTE_DEBUG
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extern void set_debug_traps(void);
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extern void rs_kgdb_hook(struct serial_state *);
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extern void breakpoint(void);
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#endif
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#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
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extern struct ide_ops std_ide_ops;
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#endif
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/* Kernel command line */
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char arcs_cmdline[CL_SIZE] __initdata = CONFIG_CMDLINE;
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extern void sb_serial_init(sb_t *sbh, void (*add)(void *regs, uint irq, uint baud_base, uint reg_shift));
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void
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bcm947xx_machine_restart(char *command)
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{
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printk("Please stand by while rebooting the system...\n");
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if (sb_chip(sbh) == BCM4785_CHIP_ID)
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MTC0(C0_BROADCOM, 4, (1 << 22));
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/* Set the watchdog timer to reset immediately */
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__cli();
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sb_watchdog(sbh, 1);
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if (sb_chip(sbh) == BCM4785_CHIP_ID) {
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__asm__ __volatile__(
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".set\tmips3\n\t"
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"sync\n\t"
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"wait\n\t"
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".set\tmips0");
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}
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while (1);
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}
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void
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bcm947xx_machine_halt(void)
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{
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printk("System halted\n");
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/* Disable interrupts and watchdog and spin forever */
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__cli();
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sb_watchdog(sbh, 0);
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while (1);
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}
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#ifdef CONFIG_SERIAL
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static int ser_line = 0;
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typedef struct {
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void *regs;
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uint irq;
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uint baud_base;
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uint reg_shift;
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} serial_port;
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static serial_port ports[4];
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static int num_ports = 0;
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static void
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serial_add(void *regs, uint irq, uint baud_base, uint reg_shift)
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{
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ports[num_ports].regs = regs;
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ports[num_ports].irq = irq;
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ports[num_ports].baud_base = baud_base;
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ports[num_ports].reg_shift = reg_shift;
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num_ports++;
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}
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static void
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do_serial_add(serial_port *port)
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{
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void *regs;
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uint irq;
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uint baud_base;
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uint reg_shift;
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struct serial_struct s;
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regs = port->regs;
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irq = port->irq;
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baud_base = port->baud_base;
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reg_shift = port->reg_shift;
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memset(&s, 0, sizeof(s));
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s.line = ser_line++;
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s.iomem_base = regs;
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s.irq = irq + 2;
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s.baud_base = baud_base / 16;
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s.flags = ASYNC_BOOT_AUTOCONF;
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s.io_type = SERIAL_IO_MEM;
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s.iomem_reg_shift = reg_shift;
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if (early_serial_setup(&s) != 0) {
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printk(KERN_ERR "Serial setup failed!\n");
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}
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}
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#endif /* CONFIG_SERIAL */
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void __init
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brcm_setup(void)
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{
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char *s;
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int i;
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char *value;
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/* Get global SB handle */
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sbh = sb_kattach(SB_OSH);
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/* Initialize clocks and interrupts */
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sb_mips_init(sbh, SBMIPS_VIRTIRQ_BASE);
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if (BCM330X(current_cpu_data.processor_id) &&
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(read_c0_diag() & BRCM_PFC_AVAIL)) {
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/*
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* Now that the sbh is inited set the proper PFC value
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*/
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printk("Setting the PFC to its default value\n");
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enable_pfc(PFC_AUTO);
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}
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#ifdef CONFIG_SERIAL
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sb_serial_init(sbh, serial_add);
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/* reverse serial ports if nvram variable starts with console=ttyS1 */
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/* Initialize UARTs */
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s = nvram_get("kernel_args");
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if (!s) s = "";
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if (!strncmp(s, "console=ttyS1", 13)) {
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for (i = num_ports; i; i--)
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do_serial_add(&ports[i - 1]);
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} else {
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for (i = 0; i < num_ports; i++)
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do_serial_add(&ports[i]);
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}
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#endif
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#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
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ide_ops = &std_ide_ops;
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#endif
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/* Override default command line arguments */
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value = nvram_get("kernel_cmdline");
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if (value && strlen(value) && strncmp(value, "empty", 5))
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strncpy(arcs_cmdline, value, sizeof(arcs_cmdline));
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/* Generic setup */
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_machine_restart = bcm947xx_machine_restart;
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_machine_halt = bcm947xx_machine_halt;
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_machine_power_off = bcm947xx_machine_halt;
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board_time_init = bcm947xx_time_init;
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board_timer_setup = bcm947xx_timer_setup;
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}
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const char *
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get_system_type(void)
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{
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static char s[32];
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if (bcm947xx_sbh) {
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sprintf(s, "Broadcom BCM%X chip rev %d", sb_chip(bcm947xx_sbh),
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sb_chiprev(bcm947xx_sbh));
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return s;
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}
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else
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return "Broadcom BCM947XX";
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}
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void __init
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bus_error_init(void)
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{
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}
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