embedded.c

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/*
 * Sonics Silicon Backplane
 * Embedded systems support code
 *
 * Copyright 2005-2008, Broadcom Corporation
 * Copyright 2006-2008, Michael Buesch <[email protected]>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include <linux/export.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/ssb/ssb_driver_pci.h>
#include <linux/ssb/ssb_driver_gige.h>
#include <linux/pci.h>

#include "ssb_private.h"


int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks)
{
    if (ssb_chipco_available(&bus->chipco)) {
        ssb_chipco_watchdog_timer_set(&bus->chipco, ticks);
        return 0;
    }
    if (ssb_extif_available(&bus->extif)) {
        ssb_extif_watchdog_timer_set(&bus->extif, ticks);
        return 0;
    }
    return -ENODEV;
}
EXPORT_SYMBOL(ssb_watchdog_timer_set);

u32 ssb_gpio_in(struct ssb_bus *bus, u32 mask)
{
    unsigned long flags;
    u32 res = 0;

    spin_lock_irqsave(&bus->gpio_lock, flags);
    if (ssb_chipco_available(&bus->chipco))
        res = ssb_chipco_gpio_in(&bus->chipco, mask);
    else if (ssb_extif_available(&bus->extif))
        res = ssb_extif_gpio_in(&bus->extif, mask);
    else
        SSB_WARN_ON(1);
    spin_unlock_irqrestore(&bus->gpio_lock, flags);

    return res;
}
EXPORT_SYMBOL(ssb_gpio_in);

u32 ssb_gpio_out(struct ssb_bus *bus, u32 mask, u32 value)
{
    unsigned long flags;
    u32 res = 0;

    spin_lock_irqsave(&bus->gpio_lock, flags);
    if (ssb_chipco_available(&bus->chipco))
        res = ssb_chipco_gpio_out(&bus->chipco, mask, value);
    else if (ssb_extif_available(&bus->extif))
        res = ssb_extif_gpio_out(&bus->extif, mask, value);
    else
        SSB_WARN_ON(1);
    spin_unlock_irqrestore(&bus->gpio_lock, flags);

    return res;
}
EXPORT_SYMBOL(ssb_gpio_out);

u32 ssb_gpio_outen(struct ssb_bus *bus, u32 mask, u32 value)
{
    unsigned long flags;
    u32 res = 0;

    spin_lock_irqsave(&bus->gpio_lock, flags);
    if (ssb_chipco_available(&bus->chipco))
        res = ssb_chipco_gpio_outen(&bus->chipco, mask, value);
    else if (ssb_extif_available(&bus->extif))
        res = ssb_extif_gpio_outen(&bus->extif, mask, value);
    else
        SSB_WARN_ON(1);
    spin_unlock_irqrestore(&bus->gpio_lock, flags);

    return res;
}
EXPORT_SYMBOL(ssb_gpio_outen);

u32 ssb_gpio_control(struct ssb_bus *bus, u32 mask, u32 value)
{
    unsigned long flags;
    u32 res = 0;

    spin_lock_irqsave(&bus->gpio_lock, flags);
    if (ssb_chipco_available(&bus->chipco))
        res = ssb_chipco_gpio_control(&bus->chipco, mask, value);
    spin_unlock_irqrestore(&bus->gpio_lock, flags);

    return res;
}
EXPORT_SYMBOL(ssb_gpio_control);

u32 ssb_gpio_intmask(struct ssb_bus *bus, u32 mask, u32 value)
{
    unsigned long flags;
    u32 res = 0;

    spin_lock_irqsave(&bus->gpio_lock, flags);
    if (ssb_chipco_available(&bus->chipco))
        res = ssb_chipco_gpio_intmask(&bus->chipco, mask, value);
    else if (ssb_extif_available(&bus->extif))
        res = ssb_extif_gpio_intmask(&bus->extif, mask, value);
    else
        SSB_WARN_ON(1);
    spin_unlock_irqrestore(&bus->gpio_lock, flags);

    return res;
}
EXPORT_SYMBOL(ssb_gpio_intmask);

u32 ssb_gpio_polarity(struct ssb_bus *bus, u32 mask, u32 value)
{
    unsigned long flags;
    u32 res = 0;

    spin_lock_irqsave(&bus->gpio_lock, flags);
    if (ssb_chipco_available(&bus->chipco))
        res = ssb_chipco_gpio_polarity(&bus->chipco, mask, value);
    else if (ssb_extif_available(&bus->extif))
        res = ssb_extif_gpio_polarity(&bus->extif, mask, value);
    else
        SSB_WARN_ON(1);
    spin_unlock_irqrestore(&bus->gpio_lock, flags);

    return res;
}
EXPORT_SYMBOL(ssb_gpio_polarity);

#ifdef CONFIG_SSB_DRIVER_GIGE
static int gige_pci_init_callback(struct ssb_bus *bus, unsigned long data)
{
    struct pci_dev *pdev = (struct pci_dev *)data;
    struct ssb_device *dev;
    unsigned int i;
    int res;

    for (i = 0; i < bus->nr_devices; i++) {
        dev = &(bus->devices[i]);
        if (dev->id.coreid != SSB_DEV_ETHERNET_GBIT)
            continue;
        if (!dev->dev ||
            !dev->dev->driver ||
            !device_is_registered(dev->dev))
            continue;
        res = ssb_gige_pcibios_plat_dev_init(dev, pdev);
        if (res >= 0)
            return res;
    }

    return -ENODEV;
}
#endif /* CONFIG_SSB_DRIVER_GIGE */

int ssb_pcibios_plat_dev_init(struct pci_dev *dev)
{
    int err;

    err = ssb_pcicore_plat_dev_init(dev);
    if (!err)
        return 0;
#ifdef CONFIG_SSB_DRIVER_GIGE
    err = ssb_for_each_bus_call((unsigned long)dev, gige_pci_init_callback);
    if (err >= 0)
        return err;
#endif
    /* This is not a PCI device on any SSB device. */

    return -ENODEV;
}

#ifdef CONFIG_SSB_DRIVER_GIGE
static int gige_map_irq_callback(struct ssb_bus *bus, unsigned long data)
{
    const struct pci_dev *pdev = (const struct pci_dev *)data;
    struct ssb_device *dev;
    unsigned int i;
    int res;

    for (i = 0; i < bus->nr_devices; i++) {
        dev = &(bus->devices[i]);
        if (dev->id.coreid != SSB_DEV_ETHERNET_GBIT)
            continue;
        if (!dev->dev ||
            !dev->dev->driver ||
            !device_is_registered(dev->dev))
            continue;
        res = ssb_gige_map_irq(dev, pdev);
        if (res >= 0)
            return res;
    }

    return -ENODEV;
}
#endif /* CONFIG_SSB_DRIVER_GIGE */

int ssb_pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
    int res;

    /* Check if this PCI device is a device on a SSB bus or device
     * and return the IRQ number for it. */

    res = ssb_pcicore_pcibios_map_irq(dev, slot, pin);
    if (res >= 0)
        return res;
#ifdef CONFIG_SSB_DRIVER_GIGE
    res = ssb_for_each_bus_call((unsigned long)dev, gige_map_irq_callback);
    if (res >= 0)
        return res;
#endif
    /* This is not a PCI device on any SSB device. */

    return -ENODEV;
}