diff options
author | Aurelien Jarno <aurelien@aurel32.net> | 2007-09-25 17:40:12 +0400 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2007-10-12 02:46:02 +0400 |
commit | 1c0c13eb935c95fd2ca0b0aca6dd4860487fb242 (patch) | |
tree | a274a6e2e56f519900fb35c544ddf279f38ca8d6 /arch/mips/bcm47xx | |
parent | ea202c632a52c4a83f1bd82d8d06bc8e04f2689a (diff) | |
download | linux-1c0c13eb935c95fd2ca0b0aca6dd4860487fb242.tar.xz |
[MIPS] Add support for BCM47XX CPUs.
Note that the BCM4710 does not support the wait instruction, this
is not a mistake in the code.
It originally comes from the OpenWrt patches.
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Florian Schirmer <jolt@tuxbox.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/bcm47xx')
-rw-r--r-- | arch/mips/bcm47xx/Makefile | 6 | ||||
-rw-r--r-- | arch/mips/bcm47xx/irq.c | 55 | ||||
-rw-r--r-- | arch/mips/bcm47xx/prom.c | 49 | ||||
-rw-r--r-- | arch/mips/bcm47xx/serial.c | 52 | ||||
-rw-r--r-- | arch/mips/bcm47xx/setup.c | 79 | ||||
-rw-r--r-- | arch/mips/bcm47xx/time.c | 56 |
6 files changed, 297 insertions, 0 deletions
diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile new file mode 100644 index 000000000000..dc035f90d363 --- /dev/null +++ b/arch/mips/bcm47xx/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for the BCM47XX specific kernel interface routines +# under Linux. +# + +obj-y := irq.o prom.o serial.o setup.o time.o diff --git a/arch/mips/bcm47xx/irq.c b/arch/mips/bcm47xx/irq.c new file mode 100644 index 000000000000..325757acd020 --- /dev/null +++ b/arch/mips/bcm47xx/irq.c @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> + * + * 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/types.h> +#include <linux/interrupt.h> +#include <linux/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(); +} diff --git a/arch/mips/bcm47xx/prom.c b/arch/mips/bcm47xx/prom.c new file mode 100644 index 000000000000..41ac9dd88bde --- /dev/null +++ b/arch/mips/bcm47xx/prom.c @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> + * + * 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 <asm/bootinfo.h> + +const char *get_system_type(void) +{ + return "Broadcom BCM47XX"; +} + +void __init prom_init(void) +{ + unsigned long mem; + + /* 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) +{ +} diff --git a/arch/mips/bcm47xx/serial.c b/arch/mips/bcm47xx/serial.c new file mode 100644 index 000000000000..59c11afdb2ab --- /dev/null +++ b/arch/mips/bcm47xx/serial.c @@ -0,0 +1,52 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net> + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/serial.h> +#include <linux/serial_8250.h> +#include <linux/ssb/ssb.h> +#include <bcm47xx.h> + +static struct plat_serial8250_port uart8250_data[5]; + +static struct platform_device uart8250_device = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = uart8250_data, + }, +}; + +static int __init uart8250_init(void) +{ + int i; + struct ssb_mipscore *mcore = &(ssb_bcm47xx.mipscore); + + memset(&uart8250_data, 0, sizeof(uart8250_data)); + + for (i = 0; i < mcore->nr_serial_ports; i++) { + struct plat_serial8250_port *p = &(uart8250_data[i]); + struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]); + + p->mapbase = (unsigned int) ssb_port->regs; + p->membase = (void *) ssb_port->regs; + p->irq = ssb_port->irq + 2; + p->uartclk = ssb_port->baud_base; + p->regshift = ssb_port->reg_shift; + p->iotype = UPIO_MEM; + p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; + } + return platform_device_register(&uart8250_device); +} + +module_init(uart8250_init); + +MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("8250 UART probe driver for the BCM47XX platforms"); diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c new file mode 100644 index 000000000000..dfc580aae958 --- /dev/null +++ b/arch/mips/bcm47xx/setup.c @@ -0,0 +1,79 @@ +/* + * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> + * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2006 Michael Buesch <mb@bu3sch.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/types.h> +#include <linux/ssb/ssb.h> +#include <asm/reboot.h> +#include <asm/time.h> +#include <bcm47xx.h> + +struct ssb_bus ssb_bcm47xx; +EXPORT_SYMBOL(ssb_bcm47xx); + +static void bcm47xx_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_bcm47xx.chipco, 1); + while (1) + cpu_relax(); +} + +static void bcm47xx_machine_halt(void) +{ + /* Disable interrupts and watchdog and spin forever */ + local_irq_disable(); + ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 0); + while (1) + cpu_relax(); +} + +static int bcm47xx_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 err; + + err = ssb_bus_ssbbus_register(&ssb_bcm47xx, SSB_ENUM_BASE, + bcm47xx_get_invariants); + if (err) + panic("Failed to initialize SSB bus (err %d)\n", err); + + _machine_restart = bcm47xx_machine_restart; + _machine_halt = bcm47xx_machine_halt; + pm_power_off = bcm47xx_machine_halt; + board_time_init = bcm47xx_time_init; +} + diff --git a/arch/mips/bcm47xx/time.c b/arch/mips/bcm47xx/time.c new file mode 100644 index 000000000000..b27d07f29059 --- /dev/null +++ b/arch/mips/bcm47xx/time.c @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> + * + * 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/ssb/ssb.h> +#include <asm/time.h> +#include <bcm47xx.h> + +void __init +bcm47xx_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_bcm47xx.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); +} |