The patch below against 2.6.23-rc1-mm2 adds support for BCM947xx CPUs.
It originally comes from the OpenWrt patches.
Cc: Michael Buesch <mb@xxxxxxxxx>
Cc: Waldemar Brodkorb <wbx@xxxxxxxxxxx>
Cc: Felix Fietkau <nbd@xxxxxxxxxxx>
Cc: Florian Schirmer <jolt@xxxxxxxxxx>
Signed-off-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
--- a/arch/mips/bcm947xx/irq.c
+++ b/arch/mips/bcm947xx/irq.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2004 Florian Schirmer <jolt@xxxxxxxxxx>
+ *
+ * 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/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/smp.h>
+#include <linux/types.h>
+
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/irq_cpu.h>
+
+void plat_irq_dispatch(void)
+{
+ u32 cause;
+
+ cause = read_c0_cause() & read_c0_status() & CAUSEF_IP;
+
+ clear_c0_status(cause);
+
+ if (cause & CAUSEF_IP7)
+ do_IRQ(7);
+ if (cause & CAUSEF_IP2)
+ do_IRQ(2);
+ if (cause & CAUSEF_IP3)
+ do_IRQ(3);
+ if (cause & CAUSEF_IP4)
+ do_IRQ(4);
+ if (cause & CAUSEF_IP5)
+ do_IRQ(5);
+ if (cause & CAUSEF_IP6)
+ do_IRQ(6);
+}
+
+void __init arch_init_irq(void)
+{
+ mips_cpu_irq_init();
+}
--- a/arch/mips/bcm947xx/Makefile
+++ b/arch/mips/bcm947xx/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the BCM947xx specific kernel interface routines
+# under Linux.
+#
+
+obj-y := irq.o prom.o setup.o time.o
--- a/arch/mips/bcm947xx/prom.c
+++ b/arch/mips/bcm947xx/prom.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2004 Florian Schirmer <jolt@xxxxxxxxxx>
+ *
+ * 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/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/pmon.h>
+
+const char *get_system_type(void)
+{
+ return "Broadcom BCM947xx";
+}
+
+void __init prom_init(void)
+{
+ unsigned long mem;
+
+ mips_machgroup = MACH_GROUP_BRCM;
+ mips_machtype = MACH_BCM947XX;
+
+ /* Figure out memory size by finding aliases */
+ for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
+ if (*(unsigned long *)((unsigned long)(prom_init) + mem) ==
+ *(unsigned long *)(prom_init))
+ break;
+ }
+
+ add_memory_region(0, mem, BOOT_MEM_RAM);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
--- a/arch/mips/bcm947xx/setup.c
+++ b/arch/mips/bcm947xx/setup.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2004 Florian Schirmer <jolt@xxxxxxxxxx>
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@xxxxxxxxxxx>
+ * Copyright (C) 2006 Felix Fietkau <nbd@xxxxxxxxxxx>
+ * Copyright (C) 2006 Michael Buesch <mb@xxxxxxxxx>
+ *
+ * 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/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+#include <linux/serial_8250.h>
+#include <asm/bootinfo.h>
+#include <asm/time.h>
+#include <asm/reboot.h>
+#include <linux/pm.h>
+#include <linux/ssb/ssb.h>
+
+extern void bcm947xx_pci_init(void);
+extern void bcm947xx_time_init(void);
+
+struct ssb_bus ssb;
+
+static void bcm947xx_machine_restart(char *command)
+{
+ printk(KERN_ALERT "Please stand by while rebooting the system...\n");
+ local_irq_disable();
+ /* Set the watchdog timer to reset immediately */
+ ssb_chipco_watchdog_timer_set(&ssb.chipco, 1);
+ while (1)
+ cpu_relax();
+}
+
+static void bcm947xx_machine_halt(void)
+{
+ /* Disable interrupts and watchdog and spin forever */
+ local_irq_disable();
+ ssb_chipco_watchdog_timer_set(&ssb.chipco, 0);
+ while (1)
+ cpu_relax();
+}
+
+static int bcm947xx_get_invariants(struct ssb_bus *bus, struct ssb_init_invariants *iv)
+{
+ /* TODO: fill ssb_init_invariants using boardtype/boardrev
+ * CFE environment variables.
+ */
+
+ return 0;
+}
+
+void __init plat_mem_setup(void)
+{
+ int i, err;
+ struct ssb_mipscore *mcore;
+
+ err = ssb_bus_ssbbus_register(&ssb, SSB_ENUM_BASE, bcm947xx_get_invariants);
+ if (err)
+ panic("Failed to initialize SSB bus (err %d)\n", err);
+ mcore = &ssb.mipscore;
+
+#ifdef CONFIG_SERIAL_8250
+ for (i = 0; i < mcore->nr_serial_ports; i++) {
+ struct ssb_serial_port *port = &(mcore->serial_ports[i]);
+ struct uart_port s;
+
+ memset(&s, 0, sizeof(s));
+ s.line = i;
+ s.membase = port->regs;
+ s.irq = port->irq + 2;
+ s.uartclk = port->baud_base;
+ s.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+ s.iotype = SERIAL_IO_MEM;
+ s.regshift = port->reg_shift;
+
+ early_serial_setup(&s);
+ }
+#endif
+
+ _machine_restart = bcm947xx_machine_restart;
+ _machine_halt = bcm947xx_machine_halt;
+ pm_power_off = bcm947xx_machine_halt;
+ board_time_init = bcm947xx_time_init;
+}
+
+EXPORT_SYMBOL(ssb);
--- a/arch/mips/bcm947xx/time.c
+++ b/arch/mips/bcm947xx/time.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2004 Florian Schirmer <jolt@xxxxxxxxxx>
+ *
+ * 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/kernel.h>
+#include <linux/sched.h>
+#include <linux/serial_reg.h>
+#include <linux/interrupt.h>
+#include <linux/ssb/ssb.h>
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/time.h>
+
+extern struct ssb_bus ssb;
+
+void __init
+bcm947xx_time_init(void)
+{
+ unsigned long hz;
+
+ /*
+ * Use deterministic values for initial counter interrupt
+ * so that calibrate delay avoids encountering a counter wrap.
+ */
+ write_c0_count(0);
+ write_c0_compare(0xffff);
+
+ hz = ssb_cpu_clock(&ssb.mipscore) / 2;
+ if (!hz)
+ hz = 100000000;
+
+ /* Set MIPS counter frequency for fixed_rate_gettimeoffset() */
+ mips_hpt_frequency = hz;
+}
+
+void __init
+plat_timer_setup(struct irqaction *irq)
+{
+ /* Enable the timer interrupt */
+ setup_irq(7, irq);
+}
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32@xxxxxxxxxx | aurelien@xxxxxxxxxxx
`- people.debian.org/~aurel32 | www.aurel32.net
