system-bus.c

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/*
 *  PS3 system bus driver.
 *
 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
 *  Copyright 2006 Sony Corp.
 *
 *  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; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/slab.h>

#include <asm/udbg.h>
#include <asm/lv1call.h>
#include <asm/firmware.h>
#include <asm/cell-regs.h>

#include "platform.h"

static struct device ps3_system_bus = {
    .init_name = "ps3_system",
};

/* FIXME: need device usage counters! */
struct {
    struct mutex mutex;
    int sb_11; /* usb 0 */
    int sb_12; /* usb 0 */
    int gpu;
} static usage_hack;

static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
             u64 dev_id)
{
    return dev->bus_id == bus_id && dev->dev_id == dev_id;
}

static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
{
    int result;

    BUG_ON(!dev->bus_id);
    mutex_lock(&usage_hack.mutex);

    if (ps3_is_device(dev, 1, 1)) {
        usage_hack.sb_11++;
        if (usage_hack.sb_11 > 1) {
            result = 0;
            goto done;
        }
    }

    if (ps3_is_device(dev, 1, 2)) {
        usage_hack.sb_12++;
        if (usage_hack.sb_12 > 1) {
            result = 0;
            goto done;
        }
    }

    result = lv1_open_device(dev->bus_id, dev->dev_id, 0);

    if (result) {
        pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
            __LINE__, ps3_result(result));
            result = -EPERM;
    }

done:
    mutex_unlock(&usage_hack.mutex);
    return result;
}

static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
{
    int result;

    BUG_ON(!dev->bus_id);
    mutex_lock(&usage_hack.mutex);

    if (ps3_is_device(dev, 1, 1)) {
        usage_hack.sb_11--;
        if (usage_hack.sb_11) {
            result = 0;
            goto done;
        }
    }

    if (ps3_is_device(dev, 1, 2)) {
        usage_hack.sb_12--;
        if (usage_hack.sb_12) {
            result = 0;
            goto done;
        }
    }

    result = lv1_close_device(dev->bus_id, dev->dev_id);
    BUG_ON(result);

done:
    mutex_unlock(&usage_hack.mutex);
    return result;
}

static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
{
    int result;

    mutex_lock(&usage_hack.mutex);

    usage_hack.gpu++;
    if (usage_hack.gpu > 1) {
        result = 0;
        goto done;
    }

    result = lv1_gpu_open(0);

    if (result) {
        pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
            __LINE__, ps3_result(result));
            result = -EPERM;
    }

done:
    mutex_unlock(&usage_hack.mutex);
    return result;
}

static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
{
    int result;

    mutex_lock(&usage_hack.mutex);

    usage_hack.gpu--;
    if (usage_hack.gpu) {
        result = 0;
        goto done;
    }

    result = lv1_gpu_close();
    BUG_ON(result);

done:
    mutex_unlock(&usage_hack.mutex);
    return result;
}

int ps3_open_hv_device(struct ps3_system_bus_device *dev)
{
    BUG_ON(!dev);
    pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);

    switch (dev->match_id) {
    case PS3_MATCH_ID_EHCI:
    case PS3_MATCH_ID_OHCI:
    case PS3_MATCH_ID_GELIC:
    case PS3_MATCH_ID_STOR_DISK:
    case PS3_MATCH_ID_STOR_ROM:
    case PS3_MATCH_ID_STOR_FLASH:
        return ps3_open_hv_device_sb(dev);

    case PS3_MATCH_ID_SOUND:
    case PS3_MATCH_ID_GPU:
        return ps3_open_hv_device_gpu(dev);

    case PS3_MATCH_ID_AV_SETTINGS:
    case PS3_MATCH_ID_SYSTEM_MANAGER:
        pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
            __LINE__, dev->match_id);
        pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
            dev->bus_id);
        BUG();
        return -EINVAL;

    default:
        break;
    }

    pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
        dev->match_id);
    BUG();
    return -ENODEV;
}
EXPORT_SYMBOL_GPL(ps3_open_hv_device);

int ps3_close_hv_device(struct ps3_system_bus_device *dev)
{
    BUG_ON(!dev);
    pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);

    switch (dev->match_id) {
    case PS3_MATCH_ID_EHCI:
    case PS3_MATCH_ID_OHCI:
    case PS3_MATCH_ID_GELIC:
    case PS3_MATCH_ID_STOR_DISK:
    case PS3_MATCH_ID_STOR_ROM:
    case PS3_MATCH_ID_STOR_FLASH:
        return ps3_close_hv_device_sb(dev);

    case PS3_MATCH_ID_SOUND:
    case PS3_MATCH_ID_GPU:
        return ps3_close_hv_device_gpu(dev);

    case PS3_MATCH_ID_AV_SETTINGS:
    case PS3_MATCH_ID_SYSTEM_MANAGER:
        pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
            __LINE__, dev->match_id);
        pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
            dev->bus_id);
        BUG();
        return -EINVAL;

    default:
        break;
    }

    pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
        dev->match_id);
    BUG();
    return -ENODEV;
}
EXPORT_SYMBOL_GPL(ps3_close_hv_device);

#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
static void _dump_mmio_region(const struct ps3_mmio_region* r,
    const char* func, int line)
{
    pr_debug("%s:%d: dev       %llu:%llu\n", func, line, r->dev->bus_id,
        r->dev->dev_id);
    pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
    pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
    pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
}

static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
{
    int result;
    u64 lpar_addr;

    result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
        r->bus_addr, r->len, r->page_size, &lpar_addr);
    r->lpar_addr = lpar_addr;

    if (result) {
        pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
            __func__, __LINE__, ps3_result(result));
        r->lpar_addr = 0;
    }

    dump_mmio_region(r);
    return result;
}

static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
{
    /* device specific; do nothing currently */
    return 0;
}

int ps3_mmio_region_create(struct ps3_mmio_region *r)
{
    return r->mmio_ops->create(r);
}
EXPORT_SYMBOL_GPL(ps3_mmio_region_create);

static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
{
    int result;

    dump_mmio_region(r);
    result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
        r->lpar_addr);

    if (result)
        pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
            __func__, __LINE__, ps3_result(result));

    r->lpar_addr = 0;
    return result;
}

static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
{
    /* device specific; do nothing currently */
    return 0;
}


int ps3_free_mmio_region(struct ps3_mmio_region *r)
{
    return r->mmio_ops->free(r);
}

EXPORT_SYMBOL_GPL(ps3_free_mmio_region);

static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
    .create = ps3_sb_mmio_region_create,
    .free = ps3_sb_free_mmio_region
};

static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
    .create = ps3_ioc0_mmio_region_create,
    .free = ps3_ioc0_free_mmio_region
};

int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
    struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
    enum ps3_mmio_page_size page_size)
{
    r->dev = dev;
    r->bus_addr = bus_addr;
    r->len = len;
    r->page_size = page_size;
    switch (dev->dev_type) {
    case PS3_DEVICE_TYPE_SB:
        r->mmio_ops = &ps3_mmio_sb_region_ops;
        break;
    case PS3_DEVICE_TYPE_IOC0:
        r->mmio_ops = &ps3_mmio_ioc0_region_ops;
        break;
    default:
        BUG();
        return -EINVAL;
    }
    return 0;
}
EXPORT_SYMBOL_GPL(ps3_mmio_region_init);

static int ps3_system_bus_match(struct device *_dev,
    struct device_driver *_drv)
{
    int result;
    struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);

    if (!dev->match_sub_id)
        result = dev->match_id == drv->match_id;
    else
        result = dev->match_sub_id == drv->match_sub_id &&
            dev->match_id == drv->match_id;

    if (result)
        pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
            __func__, __LINE__,
            dev->match_id, dev->match_sub_id, dev_name(&dev->core),
            drv->match_id, drv->match_sub_id, drv->core.name);
    else
        pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
            __func__, __LINE__,
            dev->match_id, dev->match_sub_id, dev_name(&dev->core),
            drv->match_id, drv->match_sub_id, drv->core.name);

    return result;
}

static int ps3_system_bus_probe(struct device *_dev)
{
    int result = 0;
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    struct ps3_system_bus_driver *drv;

    BUG_ON(!dev);
    dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);

    drv = ps3_system_bus_dev_to_system_bus_drv(dev);
    BUG_ON(!drv);

    if (drv->probe)
        result = drv->probe(dev);
    else
        pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
            dev_name(&dev->core));

    pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
    return result;
}

static int ps3_system_bus_remove(struct device *_dev)
{
    int result = 0;
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    struct ps3_system_bus_driver *drv;

    BUG_ON(!dev);
    dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);

    drv = ps3_system_bus_dev_to_system_bus_drv(dev);
    BUG_ON(!drv);

    if (drv->remove)
        result = drv->remove(dev);
    else
        dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
            __func__, __LINE__, drv->core.name);

    pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
    return result;
}

static void ps3_system_bus_shutdown(struct device *_dev)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    struct ps3_system_bus_driver *drv;

    BUG_ON(!dev);

    dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
        dev->match_id);

    if (!dev->core.driver) {
        dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
            __LINE__);
        return;
    }

    drv = ps3_system_bus_dev_to_system_bus_drv(dev);

    BUG_ON(!drv);

    dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
        dev_name(&dev->core), drv->core.name);

    if (drv->shutdown)
        drv->shutdown(dev);
    else if (drv->remove) {
        dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
            __func__, __LINE__, drv->core.name);
        drv->remove(dev);
    } else {
        dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
            __func__, __LINE__, drv->core.name);
        BUG();
    }

    dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
}

static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);

    if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
               dev->match_sub_id))
        return -ENOMEM;
    return 0;
}

static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
    char *buf)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
               dev->match_sub_id);

    return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}

static struct device_attribute ps3_system_bus_dev_attrs[] = {
    __ATTR_RO(modalias),
    __ATTR_NULL,
};

struct bus_type ps3_system_bus_type = {
    .name = "ps3_system_bus",
    .match = ps3_system_bus_match,
    .uevent = ps3_system_bus_uevent,
    .probe = ps3_system_bus_probe,
    .remove = ps3_system_bus_remove,
    .shutdown = ps3_system_bus_shutdown,
    .dev_attrs = ps3_system_bus_dev_attrs,
};

static int __init ps3_system_bus_init(void)
{
    int result;

    if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
        return -ENODEV;

    pr_debug(" -> %s:%d\n", __func__, __LINE__);

    mutex_init(&usage_hack.mutex);

    result = device_register(&ps3_system_bus);
    BUG_ON(result);

    result = bus_register(&ps3_system_bus_type);
    BUG_ON(result);

    pr_debug(" <- %s:%d\n", __func__, __LINE__);
    return result;
}

core_initcall(ps3_system_bus_init);

/* Allocates a contiguous real buffer and creates mappings over it.
 * Returns the virtual address of the buffer and sets dma_handle
 * to the dma address (mapping) of the first page.
 */
static void * ps3_alloc_coherent(struct device *_dev, size_t size,
                 dma_addr_t *dma_handle, gfp_t flag,
                 struct dma_attrs *attrs)
{
    int result;
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    unsigned long virt_addr;

    flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
    flag |= __GFP_ZERO;

    virt_addr = __get_free_pages(flag, get_order(size));

    if (!virt_addr) {
        pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
        goto clean_none;
    }

    result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
                 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
                 CBE_IOPTE_SO_RW | CBE_IOPTE_M);

    if (result) {
        pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
            __func__, __LINE__, result);
        BUG_ON("check region type");
        goto clean_alloc;
    }

    return (void*)virt_addr;

clean_alloc:
    free_pages(virt_addr, get_order(size));
clean_none:
    dma_handle = NULL;
    return NULL;
}

static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
                  dma_addr_t dma_handle, struct dma_attrs *attrs)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);

    ps3_dma_unmap(dev->d_region, dma_handle, size);
    free_pages((unsigned long)vaddr, get_order(size));
}

/* Creates TCEs for a user provided buffer.  The user buffer must be
 * contiguous real kernel storage (not vmalloc).  The address passed here
 * comprises a page address and offset into that page. The dma_addr_t
 * returned will point to the same byte within the page as was passed in.
 */

static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
    unsigned long offset, size_t size, enum dma_data_direction direction,
    struct dma_attrs *attrs)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    int result;
    dma_addr_t bus_addr;
    void *ptr = page_address(page) + offset;

    result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
                 &bus_addr,
                 CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
                 CBE_IOPTE_SO_RW | CBE_IOPTE_M);

    if (result) {
        pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
            __func__, __LINE__, result);
    }

    return bus_addr;
}

static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
                    unsigned long offset, size_t size,
                    enum dma_data_direction direction,
                    struct dma_attrs *attrs)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    int result;
    dma_addr_t bus_addr;
    u64 iopte_flag;
    void *ptr = page_address(page) + offset;

    iopte_flag = CBE_IOPTE_M;
    switch (direction) {
    case DMA_BIDIRECTIONAL:
        iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
        break;
    case DMA_TO_DEVICE:
        iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
        break;
    case DMA_FROM_DEVICE:
        iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
        break;
    default:
        /* not happned */
        BUG();
    };
    result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
                 &bus_addr, iopte_flag);

    if (result) {
        pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
            __func__, __LINE__, result);
    }
    return bus_addr;
}

static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
    size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    int result;

    result = ps3_dma_unmap(dev->d_region, dma_addr, size);

    if (result) {
        pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
            __func__, __LINE__, result);
    }
}

static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
    int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
{
#if defined(CONFIG_PS3_DYNAMIC_DMA)
    BUG_ON("do");
    return -EPERM;
#else
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    struct scatterlist *sg;
    int i;

    for_each_sg(sgl, sg, nents, i) {
        int result = ps3_dma_map(dev->d_region, sg_phys(sg),
                    sg->length, &sg->dma_address, 0);

        if (result) {
            pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
                __func__, __LINE__, result);
            return -EINVAL;
        }

        sg->dma_length = sg->length;
    }

    return nents;
#endif
}

static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
               int nents,
               enum dma_data_direction direction,
               struct dma_attrs *attrs)
{
    BUG();
    return 0;
}

static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
    int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
{
#if defined(CONFIG_PS3_DYNAMIC_DMA)
    BUG_ON("do");
#endif
}

static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
                int nents, enum dma_data_direction direction,
                struct dma_attrs *attrs)
{
    BUG();
}

static int ps3_dma_supported(struct device *_dev, u64 mask)
{
    return mask >= DMA_BIT_MASK(32);
}

static u64 ps3_dma_get_required_mask(struct device *_dev)
{
    return DMA_BIT_MASK(32);
}

static struct dma_map_ops ps3_sb_dma_ops = {
    .alloc = ps3_alloc_coherent,
    .free = ps3_free_coherent,
    .map_sg = ps3_sb_map_sg,
    .unmap_sg = ps3_sb_unmap_sg,
    .dma_supported = ps3_dma_supported,
    .get_required_mask = ps3_dma_get_required_mask,
    .map_page = ps3_sb_map_page,
    .unmap_page = ps3_unmap_page,
};

static struct dma_map_ops ps3_ioc0_dma_ops = {
    .alloc = ps3_alloc_coherent,
    .free = ps3_free_coherent,
    .map_sg = ps3_ioc0_map_sg,
    .unmap_sg = ps3_ioc0_unmap_sg,
    .dma_supported = ps3_dma_supported,
    .get_required_mask = ps3_dma_get_required_mask,
    .map_page = ps3_ioc0_map_page,
    .unmap_page = ps3_unmap_page,
};

static void ps3_system_bus_release_device(struct device *_dev)
{
    struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
    kfree(dev);
}

int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
{
    int result;
    static unsigned int dev_ioc0_count;
    static unsigned int dev_sb_count;
    static unsigned int dev_vuart_count;
    static unsigned int dev_lpm_count;

    if (!dev->core.parent)
        dev->core.parent = &ps3_system_bus;
    dev->core.bus = &ps3_system_bus_type;
    dev->core.release = ps3_system_bus_release_device;

    switch (dev->dev_type) {
    case PS3_DEVICE_TYPE_IOC0:
        dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
        dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
        break;
    case PS3_DEVICE_TYPE_SB:
        dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
        dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);

        break;
    case PS3_DEVICE_TYPE_VUART:
        dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
        break;
    case PS3_DEVICE_TYPE_LPM:
        dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
        break;
    default:
        BUG();
    };

    dev->core.of_node = NULL;
    set_dev_node(&dev->core, 0);

    pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));

    result = device_register(&dev->core);
    return result;
}

EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);

int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
{
    int result;

    pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);

    if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
        return -ENODEV;

    drv->core.bus = &ps3_system_bus_type;

    result = driver_register(&drv->core);
    pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
    return result;
}

EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);

void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
{
    pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
    driver_unregister(&drv->core);
    pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
}

EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);