Subject: [patch 18/18] PS3: Device registration routines.

From: Geoff Levand <[email-masked]>
Date: Tue, 05 Jun 2007 20:01:56 -0700

Add routines to probe devices present on the system
and to register those devices with the LDM.

Signed-off-by: Geoff Levand <[email-masked]>
---
 arch/powerpc/platforms/ps3/Makefile      |    1 
 arch/powerpc/platforms/ps3/device-init.c |  791 +++++++++++++++++++++++++++++++
 2 files changed, 792 insertions(+)

--- a/arch/powerpc/platforms/ps3/Makefile
+++ b/arch/powerpc/platforms/ps3/Makefile
@@ -4,3 +4,4 @@ obj-y += system-bus.o
 
 obj-$(CONFIG_SMP) += smp.o
 obj-$(CONFIG_SPU_BASE) += spu.o
+obj-y += device-init.o
--- /dev/null
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -0,0 +1,791 @@
+/*
+ *  PS3 device registration routines.
+ *
+ *  Copyright (C) 2007 Sony Computer Entertainment Inc.
+ *  Copyright 2007 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/delay.h>
+#include <linux/freezer.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/init.h>
+
+#include <asm/firmware.h>
+#include <asm/lv1call.h>
+#include <asm/ps3stor.h>
+
+#include "platform.h"
+
+/**
+ * ps3_setup_gelic_device - Setup and register a gelic device instance.
+ *
+ * Allocates memory for a struct ps3_system_bus_device instance, initialises the
+ * structure members, and registers the device instance with the system bus.
+ */
+
+static int __devinit ps3_setup_gelic_device(
+	const struct ps3_repository_device *repo)
+{
+	int result;
+	struct layout {
+		struct ps3_system_bus_device dev;
+		struct ps3_dma_region d_region;
+	} *p;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
+	BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
+
+	p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+	if (!p) {
+		result = -ENOMEM;
+		goto fail_malloc;
+	}
+
+	p->dev.match_id = PS3_MATCH_ID_GELIC;
+	p->dev.dev_type = PS3_DEVICE_TYPE_SB;
+	p->dev.bus_id = repo->bus_id;
+	p->dev.dev_id = repo->dev_id;
+	p->dev.d_region = &p->d_region;
+
+	result = ps3_repository_find_interrupt(repo,
+		PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
+
+	if (result) {
+		pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
+			__func__, __LINE__);
+		goto fail_find_interrupt;
+	}
+
+	BUG_ON(p->dev.interrupt_id != 0);
+
+	result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
+		PS3_DMA_OTHER, NULL, 0);
+
+	if (result) {
+		pr_debug("%s:%d ps3_dma_region_init failed\n",
+			__func__, __LINE__);
+		goto fail_dma_init;
+	}
+
+	result = ps3_system_bus_device_register(&p->dev);
+
+	if (result) {
+		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+			__func__, __LINE__);
+		goto fail_device_register;
+	}
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+
+fail_device_register:
+fail_dma_init:
+fail_find_interrupt:
+	kfree(p);
+fail_malloc:
+	pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+	return result;
+}
+
+static int __devinit ps3_setup_uhc_device(
+	const struct ps3_repository_device *repo, enum ps3_match_id match_id,
+	enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
+{
+	int result;
+	struct layout {
+		struct ps3_system_bus_device dev;
+		struct ps3_dma_region d_region;
+		struct ps3_mmio_region m_region;
+	} *p;
+	u64 bus_addr;
+	u64 len;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
+	BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
+
+	p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+	if (!p) {
+		result = -ENOMEM;
+		goto fail_malloc;
+	}
+
+	p->dev.match_id = match_id;
+	p->dev.dev_type = PS3_DEVICE_TYPE_SB;
+	p->dev.bus_id = repo->bus_id;
+	p->dev.dev_id = repo->dev_id;
+	p->dev.d_region = &p->d_region;
+	p->dev.m_region = &p->m_region;
+
+	result = ps3_repository_find_interrupt(repo,
+		interrupt_type, &p->dev.interrupt_id);
+
+	if (result) {
+		pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
+			__func__, __LINE__);
+		goto fail_find_interrupt;
+	}
+
+	result = ps3_repository_find_reg(repo, reg_type,
+		&bus_addr, &len);
+
+	if (result) {
+		pr_debug("%s:%d ps3_repository_find_reg failed\n",
+			__func__, __LINE__);
+		goto fail_find_reg;
+	}
+
+	result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
+		PS3_DMA_INTERNAL, NULL, 0);
+
+	if (result) {
+		pr_debug("%s:%d ps3_dma_region_init failed\n",
+			__func__, __LINE__);
+		goto fail_dma_init;
+	}
+
+	result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
+		PS3_MMIO_4K);
+
+	if (result) {
+		pr_debug("%s:%d ps3_mmio_region_init failed\n",
+			__func__, __LINE__);
+		goto fail_mmio_init;
+	}
+
+	result = ps3_system_bus_device_register(&p->dev);
+
+	if (result) {
+		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+			__func__, __LINE__);
+		goto fail_device_register;
+	}
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+
+fail_device_register:
+fail_mmio_init:
+fail_dma_init:
+fail_find_reg:
+fail_find_interrupt:
+	kfree(p);
+fail_malloc:
+	pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+	return result;
+}
+
+static int __devinit ps3_setup_ehci_device(
+	const struct ps3_repository_device *repo)
+{
+	return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
+		PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
+}
+
+static int __devinit ps3_setup_ohci_device(
+	const struct ps3_repository_device *repo)
+{
+	return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
+		PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
+}
+
+static int __devinit ps3_setup_vuart_device(enum ps3_match_id match_id,
+	unsigned int port_number)
+{
+	int result;
+	struct layout {
+		struct ps3_system_bus_device dev;
+	} *p;
+
+	pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
+		match_id, port_number);
+
+	p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+	if (!p)
+		return -ENOMEM;
+
+	p->dev.match_id = match_id;
+	p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
+	p->dev.port_number = port_number;
+
+	result = ps3_system_bus_device_register(&p->dev);
+
+	if (result)
+		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+			__func__, __LINE__);
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+}
+
+static int ps3stor_wait_for_completion(u64 dev_id, u64 tag,
+	unsigned int timeout)
+{
+	int result = -1;
+	unsigned int retries = 0;
+	u64 status;
+
+	for (retries = 0; retries < timeout; retries++) {
+		result = lv1_storage_check_async_status(dev_id, tag, &status);
+		if (!result)
+			break;
+
+		msleep(1);
+	}
+
+	if (result)
+		pr_debug("%s:%u: check_async_status: %s, status %lx\n",
+			 __func__, __LINE__, ps3_result(result), status);
+
+	return result;
+}
+
+/**
+ * ps3_storage_wait_for_device - Wait for a storage device to become ready.
+ * @repo: The repository device to wait for.
+ *
+ * Uses the hypervisor's storage device notification mechanism to wait until
+ * a storage device is ready.  The device notification mechanism uses a
+ * psuedo device (id = -1) to asynchronously notify the guest when storage
+ * devices become ready.  The notification device has a block size of 512
+ * bytes.
+ */
+
+static int ps3_storage_wait_for_device(
+	const struct ps3_repository_device *repo)
+{
+	int result;
+	const u64 notification_dev_id = (u64)-1LL;
+	const unsigned int timeout = HZ;
+	u64 lpar;
+	u64 tag;
+	struct {
+		u64 operation_code; /* must be zero */
+		u64 event_mask; /* 1 = device ready */
+	} *notify_cmd;
+	struct {
+		u64 event_type; /* notify_device_ready */
+		u64 bus_id;
+		u64 dev_id;
+		u64 dev_type;
+		u64 dev_port;
+	} *notify_event;
+	enum {notify_device_ready = 1,};
+
+	pr_info(" -> %s:%u: bus_id %u, dev_id %u, dev_type %u\n", __func__,
+		__LINE__, repo->bus_id, repo->dev_id, repo->dev_type);
+
+	notify_cmd = kzalloc(512, GFP_KERNEL);
+	notify_event = (void*)notify_cmd;
+
+	if (!notify_cmd)
+		return -ENOMEM;
+
+	lpar = ps3_mm_phys_to_lpar(__pa(notify_cmd));
+
+	result = lv1_open_device(repo->bus_id, notification_dev_id, 0);
+
+	if (result) {
+		printk(KERN_ERR "%s:%u: lv1_open_device %s\n", __func__,
+		__LINE__, ps3_result(result));
+		result = -ENODEV;
+		goto fail_free;
+	}
+
+	/* Setup and write the request for device notification. */
+
+	notify_cmd->operation_code = 0; /* must be zero */
+	notify_cmd->event_mask = 0x01; /* device ready */
+
+	result = lv1_storage_write(notification_dev_id, 0, 0, 1, 0, lpar, &tag);
+
+	if (result) {
+		printk(KERN_ERR "%s:%u: write failed %s\n", __func__, __LINE__,
+			ps3_result(result));
+		result = -ENODEV;
+		goto fail_close;
+	}
+
+	/* Wait for the write completion */
+
+	result = ps3stor_wait_for_completion(notification_dev_id, tag, timeout);
+
+	if (result) {
+		printk(KERN_ERR "%s:%u: write not completed %s\n", __func__,
+		       __LINE__, ps3_result(result));
+		result = -ENODEV;
+		goto fail_close;
+	}
+
+	/* Loop here processing the requested notification events. */
+
+	result = -ENODEV;
+	while (1) {
+		memset(notify_event, 0, sizeof(*notify_event));
+
+		result = lv1_storage_read(notification_dev_id, 0, 0, 1, 0, lpar,
+			&tag);
+
+		if (result) {
+			printk(KERN_ERR "%s:%u: write failed %s\n", __func__,
+				__LINE__, ps3_result(result));
+			break;
+		}
+
+		result = ps3stor_wait_for_completion(notification_dev_id, tag,
+			timeout);
+
+		if (result) {
+			printk(KERN_ERR "%s:%u: read not completed %s\n",
+			       __func__, __LINE__, ps3_result(result));
+			break;
+		}
+
+		if (notify_event->event_type != notify_device_ready
+			|| notify_event->bus_id != repo->bus_id) {
+			pr_debug("%s:%u: bad notify_event: event %lu, "
+				"dev_id %lu, dev_type %lu\n", __func__,
+				__LINE__, notify_event->event_type,
+				notify_event->dev_id, notify_event->dev_type);
+			break;
+		}
+
+		if (notify_event->dev_id == repo->dev_id
+			&& notify_event->dev_type == repo->dev_type) {
+			pr_debug("%s:%u: device ready: dev_id %u\n", __func__,
+				__LINE__, repo->dev_id);
+			result = 0;
+			break;
+		}
+
+		if (notify_event->dev_id == repo->dev_id
+			&& notify_event->dev_type == PS3_DEV_TYPE_NOACCESS) {
+			pr_debug("%s:%u: no access: dev_id %u\n", __func__,
+				__LINE__, repo->dev_id);
+			break;
+		}
+	}
+
+fail_close:
+	lv1_close_device(repo->bus_id, notification_dev_id);
+fail_free:
+	kfree(notify_cmd);
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+}
+
+static int __devinit ps3_setup_storage_dev(
+	const struct ps3_repository_device *repo, enum ps3_match_id match_id)
+{
+	int result;
+	struct ps3_storage_device *p;
+	u64 port, blk_size, num_blocks;
+	unsigned int num_regions, i;
+
+	pr_debug(" -> %s:%d: match_id %u\n", __func__, __LINE__, match_id);
+
+	result = ps3_repository_read_stor_dev_info(repo->bus_index,
+		repo->dev_index, &port, &blk_size, &num_blocks, &num_regions);
+
+	if (result) {
+		printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
+		       __func__, __LINE__, result);
+		return -ENODEV;
+	}
+
+	pr_debug("%s:%u: index %u:%u: port %lu blk_size %lu num_blocks %lu "
+		 "num_regions %u\n", __func__, __LINE__, repo->bus_index,
+		repo->dev_index, port, blk_size, num_blocks, num_regions);
+
+	p = kzalloc(sizeof(struct ps3_storage_device) +
+		num_regions * sizeof(struct ps3_storage_region), GFP_KERNEL);
+
+	if (!p) {
+		result = -ENOMEM;
+		goto fail_malloc;
+	}
+
+	p->sbd.match_id = match_id;
+	p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
+	p->sbd.bus_id = repo->bus_id;
+	p->sbd.dev_id = repo->dev_id;
+	p->sbd.d_region = &p->dma_region;
+	p->blk_size = blk_size;
+	p->num_regions = num_regions;
+
+	result = ps3_repository_find_interrupt(repo,
+		PS3_INTERRUPT_TYPE_EVENT_PORT, &p->sbd.interrupt_id);
+
+	if (result) {
+		printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
+			__LINE__, result);
+		result = -ENODEV;
+		goto fail_find_interrupt;
+	}
+
+	/* FIXME: Arrange to only do this on a 'cold' boot */
+
+	result = ps3_storage_wait_for_device(repo);
+
+	if (result) {
+		printk(KERN_ERR "%s:%u: storage_notification failed %d\n",
+		       __func__, __LINE__, result);
+		result = -ENODEV;
+		goto fail_probe_notification;
+	}
+
+	for (i = 0; i < num_regions; i++) {
+		unsigned int id;
+		u64 start, size;
+
+		result = ps3_repository_read_stor_dev_region(repo->bus_index,
+			repo->dev_index, i, &id, &start, &size);
+
+		if (result) {
+			printk(KERN_ERR
+			       "%s:%u: read_stor_dev_region failed %d\n",
+			       __func__, __LINE__, result);
+			result = -ENODEV;
+			goto fail_read_region;
+		}
+		pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
+			 __func__, __LINE__, i, id, start, size);
+
+		p->regions[i].id = id;
+		p->regions[i].start = start;
+		p->regions[i].size = size;
+	}
+
+	result = ps3_system_bus_device_register(&p->sbd);
+
+	if (result) {
+		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+			__func__, __LINE__);
+		goto fail_device_register;
+	}
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return 0;
+
+fail_device_register:
+fail_read_region:
+fail_probe_notification:
+fail_find_interrupt:
+	kfree(p);
+fail_malloc:
+	pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+	return result;
+}
+
+static int __init ps3_register_vuart_devices(void)
+{
+	int result;
+	unsigned int port_number;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	result = ps3_repository_read_vuart_av_port(&port_number);
+
+	if (result)
+		port_number = 0; /* av default */
+
+	result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
+	WARN_ON(result);
+
+	ps3_repository_read_vuart_sysmgr_port(&port_number);
+
+	if (result)
+		port_number = 2; /* sysmgr default */
+
+	result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
+		port_number);
+	WARN_ON(result);
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+}
+
+static int __init ps3_register_sound_devices(void)
+{
+	int result;
+	struct layout {
+		struct ps3_system_bus_device dev;
+		struct ps3_dma_region d_region;
+		struct ps3_mmio_region m_region;
+	} *p;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return -ENOMEM;
+
+	p->dev.match_id = PS3_MATCH_ID_SOUND;
+	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+	p->dev.d_region = &p->d_region;
+	p->dev.m_region = &p->m_region;
+
+	result = ps3_system_bus_device_register(&p->dev);
+
+	if (result)
+		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+			__func__, __LINE__);
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+}
+
+static int __devinit ps3_register_graphics_devices(void)
+{
+	int result;
+	struct layout {
+		struct ps3_system_bus_device dev;
+	} *p;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+	if (!p)
+		return -ENOMEM;
+
+	p->dev.match_id = PS3_MATCH_ID_GRAPHICS;
+	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+
+	result = ps3_system_bus_device_register(&p->dev);
+
+	if (result)
+		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+			__func__, __LINE__);
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+}
+
+/**
+ * ps3_register_repository_device - Register a device from the repositiory info.
+ *
+ */
+
+static int __devinit ps3_register_repository_device(
+	const struct ps3_repository_device *repo)
+{
+	int result;
+
+	switch(repo->dev_type) {
+	case PS3_DEV_TYPE_SB_GELIC:
+		result = ps3_setup_gelic_device(repo);
+		if (result) {
+			pr_debug("%s:%d ps3_setup_gelic_device failed\n",
+				__func__, __LINE__);
+		}
+		break;
+	case PS3_DEV_TYPE_SB_USB:
+
+		/* Each USB device has both an EHCI and an OHCI HC */
+
+		result = ps3_setup_ehci_device(repo);
+
+		if (result) {
+			pr_debug("%s:%d ps3_setup_ehci_device failed\n",
+				__func__, __LINE__);
+		}
+
+		result = ps3_setup_ohci_device(repo);
+
+		if (result) {
+			pr_debug("%s:%d ps3_setup_ohci_device failed\n",
+				__func__, __LINE__);
+		}
+		break;
+	case PS3_DEV_TYPE_STOR_DISK:
+		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
+
+		/* Some devices are not accessable from the Other OS lpar. */
+
+		if (result == -ENODEV) {
+			result = 0;
+			pr_debug("%s:%d: not accessable\n",
+				__func__, __LINE__);
+		}
+
+		if (result) {
+			pr_debug("%s:%d ps3_setup_storage_dev failed\n",
+				__func__, __LINE__);
+		}
+		break;
+	case PS3_DEV_TYPE_STOR_ROM:
+		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
+		if (result) {
+			pr_debug("%s:%d ps3_setup_storage_dev failed\n",
+				__func__, __LINE__);
+		}
+		break;
+	case PS3_DEV_TYPE_STOR_FLASH:
+		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
+		if (result) {
+			pr_debug("%s:%d ps3_setup_storage_dev failed\n",
+				__func__, __LINE__);
+		}
+		break;
+	default:
+		result = 0;
+		pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
+			repo->dev_type);
+	}
+
+	return result;
+}
+
+/**
+ * ps3_probe_thread - Background repository probing at system startup.
+ *
+ * This implementation only supports background probing on a single bus.
+ */
+
+static int ps3_probe_thread(void *data)
+{
+	struct ps3_repository_device *repo = data;
+	int result;
+	unsigned int ms = 250;
+
+	pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
+
+	do {
+		try_to_freeze();
+
+		pr_debug("%s:%u: probing...\n", __func__, __LINE__);
+
+		do {
+			result = ps3_repository_find_device(repo);
+
+			if (result == -ENODEV)
+				pr_debug("%s:%u: nothing new\n", __func__,
+					__LINE__);
+			else if (result)
+				pr_debug("%s:%u: find device error.\n",
+					__func__, __LINE__);
+			else {
+				pr_debug("%s:%u: found device\n", __func__,
+					__LINE__);
+				ps3_register_repository_device(repo);
+				ps3_repository_bump_device(repo);
+				ms = 250;
+			}
+		} while (!result);
+
+		pr_debug("%s:%u: ms %u\n", __func__, __LINE__, ms);
+
+		if ( ms > 60000)
+			break;
+
+		msleep_interruptible(ms);
+
+		/* An exponential backoff. */
+		ms <<= 1;
+
+	} while (!kthread_should_stop());
+
+	pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
+
+	return 0;
+}
+
+/**
+ * ps3_start_probe_thread - Starts the background probe thread.
+ *
+ */
+
+static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
+{
+	int result;
+	struct task_struct *task;
+	static struct ps3_repository_device repo; /* must be static */
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	memset(&repo, 0, sizeof(repo));
+
+	repo.bus_type = bus_type;
+
+	result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
+
+	if (result) {
+		printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
+		return -ENODEV;
+	}
+
+	result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
+
+	if (result) {
+		printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
+			result);
+		return -ENODEV;
+	}
+
+	task = kthread_run(ps3_probe_thread, &repo, "ps3-probe");
+
+	if (IS_ERR(task)) {
+		result = PTR_ERR(task);
+		printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
+		       result);
+		return result;
+	}
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return 0;
+}
+
+/**
+ * ps3_register_devices - Probe the system and register devices found.
+ *
+ * A device_initcall() routine.
+ */
+
+static int __init ps3_register_devices(void)
+{
+	int result;
+
+	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+		return -ENODEV;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	/* ps3_repository_dump_bus_info(); */
+
+	result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
+
+	ps3_register_vuart_devices();
+
+	ps3_register_graphics_devices();
+
+	ps3_repository_find_devices(PS3_BUS_TYPE_SB,
+		ps3_register_repository_device);
+
+	ps3_register_sound_devices();
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return 0;
+}
+
+device_initcall(ps3_register_devices);

--