setup.c

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/*
 *  Copyright (C) 2004 Florian Schirmer <[email protected]>
 *  Copyright (C) 2006 Felix Fietkau <[email protected]>
 *  Copyright (C) 2006 Michael Buesch <[email protected]>
 *  Copyright (C) 2010 Waldemar Brodkorb <[email protected]>
 *  Copyright (C) 2010-2012 Hauke Mehrtens <[email protected]>
 *
 *  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/export.h>
#include <linux/types.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <bcm47xx.h>
#include <asm/mach-bcm47xx/nvram.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)
{
    printk(KERN_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:
        ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
        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 int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
{
    char prefix[10];

    if (bus->bustype == SSB_BUSTYPE_PCI) {
        memset(out, 0, sizeof(struct ssb_sprom));
        snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
             bus->host_pci->bus->number + 1,
             PCI_SLOT(bus->host_pci->devfn));
        bcm47xx_fill_sprom(out, prefix);
        return 0;
    } else {
        printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
        return -EINVAL;
    }
}

static int bcm47xx_get_invariants(struct ssb_bus *bus,
                  struct ssb_init_invariants *iv)
{
    char buf[20];

    /* Fill boardinfo structure */
    memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));

    bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);

    memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
    bcm47xx_fill_sprom(&iv->sprom, NULL);

    if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
        iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);

    return 0;
}

static void __init bcm47xx_register_ssb(void)
{
    int err;
    char buf[100];
    struct ssb_mipscore *mcore;

    err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
    if (err)
        printk(KERN_WARNING "bcm47xx: someone else already registered"
            " a ssb SPROM callback handler (err %d)\n", err);

    err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
                      bcm47xx_get_invariants);
    if (err)
        panic("Failed to initialize SSB bus (err %d)", err);

    mcore = &bcm47xx_bus.ssb.mipscore;
    if (nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
        if (strstr(buf, "console=ttyS1")) {
            struct ssb_serial_port port;

            printk(KERN_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 int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
{
    char prefix[10];
    struct bcma_device *core;

    switch (bus->hosttype) {
    case BCMA_HOSTTYPE_PCI:
        memset(out, 0, sizeof(struct ssb_sprom));
        snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
             bus->host_pci->bus->number + 1,
             PCI_SLOT(bus->host_pci->devfn));
        bcm47xx_fill_sprom(out, prefix);
        return 0;
    case BCMA_HOSTTYPE_SOC:
        memset(out, 0, sizeof(struct ssb_sprom));
        bcm47xx_fill_sprom_ethernet(out, NULL);
        core = bcma_find_core(bus, BCMA_CORE_80211);
        if (core) {
            snprintf(prefix, sizeof(prefix), "sb/%u/",
                 core->core_index);
            bcm47xx_fill_sprom(out, prefix);
        }
        return 0;
    default:
        pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
        return -EINVAL;
    }
}

static void __init bcm47xx_register_bcma(void)
{
    int err;

    err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
    if (err)
        pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);

    err = bcma_host_soc_register(&bcm47xx_bus.bcma);
    if (err)
        panic("Failed to initialize BCMA bus (err %d)", err);

    bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
}
#endif

void __init plat_mem_setup(void)
{
    struct cpuinfo_mips *c = &current_cpu_data;

    if (c->cputype == CPU_74K) {
        printk(KERN_INFO "bcm47xx: using bcma bus\n");
#ifdef CONFIG_BCM47XX_BCMA
        bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
        bcm47xx_register_bcma();
#endif
    } else {
        printk(KERN_INFO "bcm47xx: using ssb bus\n");
#ifdef CONFIG_BCM47XX_SSB
        bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
        bcm47xx_register_ssb();
#endif
    }

    _machine_restart = bcm47xx_machine_restart;
    _machine_halt = bcm47xx_machine_halt;
    pm_power_off = bcm47xx_machine_halt;
}

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
    }
    return 0;
}
device_initcall(bcm47xx_register_bus_complete);