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system-bus.c

/*
 *  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/module.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>

#include <asm/udbg.h>
#include <asm/lv1call.h>
#include <asm/firmware.h>

#include "platform.h"

static struct device ps3_system_bus = {
      .bus_id = "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_GRAPHICS:
            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: %lu\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_GRAPHICS:
            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: %lu\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       %lu:%lu\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;

      result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
            r->bus_addr, r->len, r->page_size, &r->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->core.bus_id,
                  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->core.bus_id,
                  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);
      pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);

      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->core.bus_id);

      pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
      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);
      pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);

      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->core.bus_id);
      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->core.bus_id, 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", dev->match_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\n", dev->match_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)
{
      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,
                       IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | 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 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 of the buffer
 * passed here is the kernel (virtual) address of the buffer.  The buffer
 * need not be page aligned, the dma_addr_t returned will point to the same
 * byte within the page as vaddr.
 */

static dma_addr_t ps3_sb_map_single(struct device *_dev, void *ptr, 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;
      unsigned long bus_addr;

      result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
                       &bus_addr,
                       IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW | 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_single(struct device *_dev, void *ptr,
                              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;
      unsigned long bus_addr;
      u64 iopte_flag;

      iopte_flag = IOPTE_M;
      switch (direction) {
      case DMA_BIDIRECTIONAL:
            iopte_flag |= IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW;
            break;
      case DMA_TO_DEVICE:
            iopte_flag |= IOPTE_PP_R | IOPTE_SO_R;
            break;
      case DMA_FROM_DEVICE:
            iopte_flag |= IOPTE_PP_W | 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_single(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_32BIT_MASK;
}

static struct dma_mapping_ops ps3_sb_dma_ops = {
      .alloc_coherent = ps3_alloc_coherent,
      .free_coherent = ps3_free_coherent,
      .map_single = ps3_sb_map_single,
      .unmap_single = ps3_unmap_single,
      .map_sg = ps3_sb_map_sg,
      .unmap_sg = ps3_sb_unmap_sg,
      .dma_supported = ps3_dma_supported
};

static struct dma_mapping_ops ps3_ioc0_dma_ops = {
      .alloc_coherent = ps3_alloc_coherent,
      .free_coherent = ps3_free_coherent,
      .map_single = ps3_ioc0_map_single,
      .unmap_single = ps3_unmap_single,
      .map_sg = ps3_ioc0_map_sg,
      .unmap_sg = ps3_ioc0_unmap_sg,
      .dma_supported = ps3_dma_supported
};

/**
 * ps3_system_bus_release_device - remove a device from the system bus
 */

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);
}

/**
 * ps3_system_bus_device_register - add a device to the system bus
 *
 * ps3_system_bus_device_register() expects the dev object to be allocated
 * dynamically by the caller.  The system bus takes ownership of the dev
 * object and frees the object in ps3_system_bus_release_device().
 */

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;
            snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
                  "ioc0_%02x", ++dev_ioc0_count);
            break;
      case PS3_DEVICE_TYPE_SB:
            dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
            snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
                  "sb_%02x", ++dev_sb_count);

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

      dev->core.archdata.of_node = NULL;
      dev->core.archdata.numa_node = 0;

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

      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);

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