ps3: prefix all ps3-specific kernel modules with `ps3-'

- vuart.ko -> ps3-vuart.ko
- sys-manager.ko -> ps3-sys-manager.ko

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 702 insertions, 0 deletions

diff --git a/drivers/ps3/ps3-sys-manager.c b/drivers/ps3/ps3-sys-manager.c
new file mode 100644
index 000000000000..8461b08ab9fb
--- /dev/null
+++ b/drivers/ps3/ps3-sys-manager.c
@@ -0,0 +1,702 @@
+/*
+ *  PS3 System Manager.
+ *
+ *  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/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/reboot.h>
+
+#include <asm/firmware.h>
+#include <asm/ps3.h>
+
+#include "vuart.h"
+
+MODULE_AUTHOR("Sony Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PS3 System Manager");
+
+/**
+ * ps3_sys_manager - PS3 system manager driver.
+ *
+ * The system manager provides an asynchronous system event notification
+ * mechanism for reporting events like thermal alert and button presses to
+ * guests.  It also provides support to control system shutdown and startup.
+ *
+ * The actual system manager is implemented as an application running in the
+ * system policy module in lpar_1.  Guests communicate with the system manager
+ * through port 2 of the vuart using a simple packet message protocol.
+ * Messages are comprised of a fixed field header followed by a message
+ * specific payload.
+ */
+
+/**
+ * struct ps3_sys_manager_header - System manager message header.
+ * @version: Header version, currently 1.
+ * @size: Header size in bytes, curently 16.
+ * @payload_size: Message payload size in bytes.
+ * @service_id: Message type, one of enum ps3_sys_manager_service_id.
+ * @request_tag: Unique number to identify reply.
+ */
+
+struct ps3_sys_manager_header {
+        /* version 1 */
+        u8 version;
+        u8 size;
+        u16 reserved_1;
+        u32 payload_size;
+        u16 service_id;
+        u16 reserved_2;
+        u32 request_tag;
+};
+
+#define dump_sm_header(_h) _dump_sm_header(_h, __func__, __LINE__)
+static void __maybe_unused _dump_sm_header(
+        const struct ps3_sys_manager_header *h, const char *func, int line)
+{
+        pr_debug("%s:%d: version:      %xh\n", func, line, h->version);
+        pr_debug("%s:%d: size:         %xh\n", func, line, h->size);
+        pr_debug("%s:%d: payload_size: %xh\n", func, line, h->payload_size);
+        pr_debug("%s:%d: service_id:   %xh\n", func, line, h->service_id);
+        pr_debug("%s:%d: request_tag:  %xh\n", func, line, h->request_tag);
+}
+
+/**
+ * @PS3_SM_RX_MSG_LEN_MIN - Shortest received message length.
+ * @PS3_SM_RX_MSG_LEN_MAX - Longest received message length.
+ *
+ * Currently all messages received from the system manager are either
+ * (16 bytes header + 8 bytes payload = 24 bytes) or (16 bytes header
+ * + 16 bytes payload = 32 bytes).  This knowlege is used to simplify
+ * the logic.
+ */
+
+enum {
+        PS3_SM_RX_MSG_LEN_MIN = 24,
+        PS3_SM_RX_MSG_LEN_MAX = 32,
+};
+
+/**
+ * enum ps3_sys_manager_service_id - Message header service_id.
+ * @PS3_SM_SERVICE_ID_REQUEST:       guest --> sys_manager.
+ * @PS3_SM_SERVICE_ID_REQUEST_ERROR: guest <-- sys_manager.
+ * @PS3_SM_SERVICE_ID_COMMAND:       guest <-- sys_manager.
+ * @PS3_SM_SERVICE_ID_RESPONSE:      guest --> sys_manager.
+ * @PS3_SM_SERVICE_ID_SET_ATTR:      guest --> sys_manager.
+ * @PS3_SM_SERVICE_ID_EXTERN_EVENT:  guest <-- sys_manager.
+ * @PS3_SM_SERVICE_ID_SET_NEXT_OP:   guest --> sys_manager.
+ *
+ * PS3_SM_SERVICE_ID_REQUEST_ERROR is returned for invalid data values in a
+ * a PS3_SM_SERVICE_ID_REQUEST message.  It also seems to be returned when
+ * a REQUEST message is sent at the wrong time.
+ */
+
+enum ps3_sys_manager_service_id {
+        /* version 1 */
+        PS3_SM_SERVICE_ID_REQUEST = 1,
+        PS3_SM_SERVICE_ID_RESPONSE = 2,
+        PS3_SM_SERVICE_ID_COMMAND = 3,
+        PS3_SM_SERVICE_ID_EXTERN_EVENT = 4,
+        PS3_SM_SERVICE_ID_SET_NEXT_OP = 5,
+        PS3_SM_SERVICE_ID_REQUEST_ERROR = 6,
+        PS3_SM_SERVICE_ID_SET_ATTR = 8,
+};
+
+/**
+ * enum ps3_sys_manager_attr - Notification attribute (bit position mask).
+ * @PS3_SM_ATTR_POWER: Power button.
+ * @PS3_SM_ATTR_RESET: Reset button, not available on retail console.
+ * @PS3_SM_ATTR_THERMAL: Sytem thermal alert.
+ * @PS3_SM_ATTR_CONTROLLER: Remote controller event.
+ * @PS3_SM_ATTR_ALL: Logical OR of all.
+ *
+ * The guest tells the system manager which events it is interested in receiving
+ * notice of by sending the system manager a logical OR of notification
+ * attributes via the ps3_sys_manager_send_attr() routine.
+ */
+
+enum ps3_sys_manager_attr {
+        /* version 1 */
+        PS3_SM_ATTR_POWER = 1,
+        PS3_SM_ATTR_RESET = 2,
+        PS3_SM_ATTR_THERMAL = 4,
+        PS3_SM_ATTR_CONTROLLER = 8, /* bogus? */
+        PS3_SM_ATTR_ALL = 0x0f,
+};
+
+/**
+ * enum ps3_sys_manager_event - External event type, reported by system manager.
+ * @PS3_SM_EVENT_POWER_PRESSED: payload.value not used.
+ * @PS3_SM_EVENT_POWER_RELEASED: payload.value = time pressed in millisec.
+ * @PS3_SM_EVENT_RESET_PRESSED: payload.value not used.
+ * @PS3_SM_EVENT_RESET_RELEASED: payload.value = time pressed in millisec.
+ * @PS3_SM_EVENT_THERMAL_ALERT: payload.value = thermal zone id.
+ * @PS3_SM_EVENT_THERMAL_CLEARED: payload.value = thermal zone id.
+ */
+
+enum ps3_sys_manager_event {
+        /* version 1 */
+        PS3_SM_EVENT_POWER_PRESSED = 3,
+        PS3_SM_EVENT_POWER_RELEASED = 4,
+        PS3_SM_EVENT_RESET_PRESSED = 5,
+        PS3_SM_EVENT_RESET_RELEASED = 6,
+        PS3_SM_EVENT_THERMAL_ALERT = 7,
+        PS3_SM_EVENT_THERMAL_CLEARED = 8,
+        /* no info on controller events */
+};
+
+/**
+ * enum ps3_sys_manager_next_op - Operation to perform after lpar is destroyed.
+ */
+
+enum ps3_sys_manager_next_op {
+        /* version 3 */
+        PS3_SM_NEXT_OP_SYS_SHUTDOWN = 1,
+        PS3_SM_NEXT_OP_SYS_REBOOT = 2,
+        PS3_SM_NEXT_OP_LPAR_REBOOT = 0x82,
+};
+
+/**
+ * enum ps3_sys_manager_wake_source - Next-op wakeup source (bit position mask).
+ * @PS3_SM_WAKE_DEFAULT: Disk insert, power button, eject button, IR
+ * controller, and bluetooth controller.
+ * @PS3_SM_WAKE_RTC:
+ * @PS3_SM_WAKE_RTC_ERROR:
+ * @PS3_SM_WAKE_P_O_R: Power on reset.
+ *
+ * Additional wakeup sources when specifying PS3_SM_NEXT_OP_SYS_SHUTDOWN.
+ * System will always wake from the PS3_SM_WAKE_DEFAULT sources.
+ */
+
+enum ps3_sys_manager_wake_source {
+        /* version 3 */
+        PS3_SM_WAKE_DEFAULT   = 0,
+        PS3_SM_WAKE_RTC       = 0x00000040,
+        PS3_SM_WAKE_RTC_ERROR = 0x00000080,
+        PS3_SM_WAKE_P_O_R     = 0x10000000,
+};
+
+/**
+ * enum ps3_sys_manager_cmd - Command from system manager to guest.
+ *
+ * The guest completes the actions needed, then acks or naks the command via
+ * ps3_sys_manager_send_response().  In the case of @PS3_SM_CMD_SHUTDOWN,
+ * the guest must be fully prepared for a system poweroff prior to acking the
+ * command.
+ */
+
+enum ps3_sys_manager_cmd {
+        /* version 1 */
+        PS3_SM_CMD_SHUTDOWN = 1, /* shutdown guest OS */
+};
+
+/**
+ * ps3_sm_force_power_off - Poweroff helper.
+ *
+ * A global variable used to force a poweroff when the power button has
+ * been pressed irrespective of how init handles the ctrl_alt_del signal.
+ *
+ */
+
+static unsigned int ps3_sm_force_power_off;
+
+/**
+ * ps3_sys_manager_write - Helper to write a two part message to the vuart.
+ *
+ */
+
+static int ps3_sys_manager_write(struct ps3_system_bus_device *dev,
+        const struct ps3_sys_manager_header *header, const void *payload)
+{
+        int result;
+
+        BUG_ON(header->version != 1);
+        BUG_ON(header->size != 16);
+        BUG_ON(header->payload_size != 8 && header->payload_size != 16);
+        BUG_ON(header->service_id > 8);
+
+        result = ps3_vuart_write(dev, header,
+                sizeof(struct ps3_sys_manager_header));
+
+        if (!result)
+                result = ps3_vuart_write(dev, payload, header->payload_size);
+
+        return result;
+}
+
+/**
+ * ps3_sys_manager_send_attr - Send a 'set attribute' to the system manager.
+ *
+ */
+
+static int ps3_sys_manager_send_attr(struct ps3_system_bus_device *dev,
+        enum ps3_sys_manager_attr attr)
+{
+        struct ps3_sys_manager_header header;
+        struct {
+                u8 version;
+                u8 reserved_1[3];
+                u32 attribute;
+        } payload;
+
+        BUILD_BUG_ON(sizeof(payload) != 8);
+
+        dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, attr);
+
+        memset(&header, 0, sizeof(header));
+        header.version = 1;
+        header.size = 16;
+        header.payload_size = 16;
+        header.service_id = PS3_SM_SERVICE_ID_SET_ATTR;
+
+        memset(&payload, 0, sizeof(payload));
+        payload.version = 1;
+        payload.attribute = attr;
+
+        return ps3_sys_manager_write(dev, &header, &payload);
+}
+
+/**
+ * ps3_sys_manager_send_next_op - Send a 'set next op' to the system manager.
+ *
+ * Tell the system manager what to do after this lpar is destroyed.
+ */
+
+static int ps3_sys_manager_send_next_op(struct ps3_system_bus_device *dev,
+        enum ps3_sys_manager_next_op op,
+        enum ps3_sys_manager_wake_source wake_source)
+{
+        struct ps3_sys_manager_header header;
+        struct {
+                u8 version;
+                u8 type;
+                u8 gos_id;
+                u8 reserved_1;
+                u32 wake_source;
+                u8 reserved_2[8];
+        } payload;
+
+        BUILD_BUG_ON(sizeof(payload) != 16);
+
+        dev_dbg(&dev->core, "%s:%d: (%xh)\n", __func__, __LINE__, op);
+
+        memset(&header, 0, sizeof(header));
+        header.version = 1;
+        header.size = 16;
+        header.payload_size = 16;
+        header.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP;
+
+        memset(&payload, 0, sizeof(payload));
+        payload.version = 3;
+        payload.type = op;
+        payload.gos_id = 3; /* other os */
+        payload.wake_source = wake_source;
+
+        return ps3_sys_manager_write(dev, &header, &payload);
+}
+
+/**
+ * ps3_sys_manager_send_request_shutdown - Send 'request' to the system manager.
+ *
+ * The guest sends this message to request an operation or action of the system
+ * manager.  The reply is a command message from the system manager.  In the
+ * command handler the guest performs the requested operation.  The result of
+ * the command is then communicated back to the system manager with a response
+ * message.
+ *
+ * Currently, the only supported request is the 'shutdown self' request.
+ */
+
+static int ps3_sys_manager_send_request_shutdown(
+        struct ps3_system_bus_device *dev)
+{
+        struct ps3_sys_manager_header header;
+        struct {
+                u8 version;
+                u8 type;
+                u8 gos_id;
+                u8 reserved_1[13];
+        } payload;
+
+        BUILD_BUG_ON(sizeof(payload) != 16);
+
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+
+        memset(&header, 0, sizeof(header));
+        header.version = 1;
+        header.size = 16;
+        header.payload_size = 16;
+        header.service_id = PS3_SM_SERVICE_ID_REQUEST;
+
+        memset(&payload, 0, sizeof(payload));
+        payload.version = 1;
+        payload.type = 1; /* shutdown */
+        payload.gos_id = 0; /* self */
+
+        return ps3_sys_manager_write(dev, &header, &payload);
+}
+
+/**
+ * ps3_sys_manager_send_response - Send a 'response' to the system manager.
+ * @status: zero = success, others fail.
+ *
+ * The guest sends this message to the system manager to acnowledge success or
+ * failure of a command sent by the system manager.
+ */
+
+static int ps3_sys_manager_send_response(struct ps3_system_bus_device *dev,
+        u64 status)
+{
+        struct ps3_sys_manager_header header;
+        struct {
+                u8 version;
+                u8 reserved_1[3];
+                u8 status;
+                u8 reserved_2[11];
+        } payload;
+
+        BUILD_BUG_ON(sizeof(payload) != 16);
+
+        dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__,
+                (status ? "nak" : "ack"));
+
+        memset(&header, 0, sizeof(header));
+        header.version = 1;
+        header.size = 16;
+        header.payload_size = 16;
+        header.service_id = PS3_SM_SERVICE_ID_RESPONSE;
+
+        memset(&payload, 0, sizeof(payload));
+        payload.version = 1;
+        payload.status = status;
+
+        return ps3_sys_manager_write(dev, &header, &payload);
+}
+
+/**
+ * ps3_sys_manager_handle_event - Second stage event msg handler.
+ *
+ */
+
+static int ps3_sys_manager_handle_event(struct ps3_system_bus_device *dev)
+{
+        int result;
+        struct {
+                u8 version;
+                u8 type;
+                u8 reserved_1[2];
+                u32 value;
+                u8 reserved_2[8];
+        } event;
+
+        BUILD_BUG_ON(sizeof(event) != 16);
+
+        result = ps3_vuart_read(dev, &event, sizeof(event));
+        BUG_ON(result && "need to retry here");
+
+        if (event.version != 1) {
+                dev_dbg(&dev->core, "%s:%d: unsupported event version (%u)\n",
+                        __func__, __LINE__, event.version);
+                return -EIO;
+        }
+
+        switch (event.type) {
+        case PS3_SM_EVENT_POWER_PRESSED:
+                dev_dbg(&dev->core, "%s:%d: POWER_PRESSED\n",
+                        __func__, __LINE__);
+                ps3_sm_force_power_off = 1;
+                /*
+                 * A memory barrier is use here to sync memory since
+                 * ps3_sys_manager_final_restart() could be called on
+                 * another cpu.
+                 */
+                wmb();
+                kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
+                break;
+        case PS3_SM_EVENT_POWER_RELEASED:
+                dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n",
+                        __func__, __LINE__, event.value);
+                break;
+        case PS3_SM_EVENT_RESET_PRESSED:
+                dev_dbg(&dev->core, "%s:%d: RESET_PRESSED\n",
+                        __func__, __LINE__);
+                ps3_sm_force_power_off = 0;
+                /*
+                 * A memory barrier is use here to sync memory since
+                 * ps3_sys_manager_final_restart() could be called on
+                 * another cpu.
+                 */
+                wmb();
+                kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
+                break;
+        case PS3_SM_EVENT_RESET_RELEASED:
+                dev_dbg(&dev->core, "%s:%d: RESET_RELEASED (%u ms)\n",
+                        __func__, __LINE__, event.value);
+                break;
+        case PS3_SM_EVENT_THERMAL_ALERT:
+                dev_dbg(&dev->core, "%s:%d: THERMAL_ALERT (zone %u)\n",
+                        __func__, __LINE__, event.value);
+                printk(KERN_INFO "PS3 Thermal Alert Zone %u\n", event.value);
+                break;
+        case PS3_SM_EVENT_THERMAL_CLEARED:
+                dev_dbg(&dev->core, "%s:%d: THERMAL_CLEARED (zone %u)\n",
+                        __func__, __LINE__, event.value);
+                break;
+        default:
+                dev_dbg(&dev->core, "%s:%d: unknown event (%u)\n",
+                        __func__, __LINE__, event.type);
+                return -EIO;
+        }
+
+        return 0;
+}
+/**
+ * ps3_sys_manager_handle_cmd - Second stage command msg handler.
+ *
+ * The system manager sends this in reply to a 'request' message from the guest.
+ */
+
+static int ps3_sys_manager_handle_cmd(struct ps3_system_bus_device *dev)
+{
+        int result;
+        struct {
+                u8 version;
+                u8 type;
+                u8 reserved_1[14];
+        } cmd;
+
+        BUILD_BUG_ON(sizeof(cmd) != 16);
+
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+
+        result = ps3_vuart_read(dev, &cmd, sizeof(cmd));
+        BUG_ON(result && "need to retry here");
+
+        if(result)
+                return result;
+
+        if (cmd.version != 1) {
+                dev_dbg(&dev->core, "%s:%d: unsupported cmd version (%u)\n",
+                        __func__, __LINE__, cmd.version);
+                return -EIO;
+        }
+
+        if (cmd.type != PS3_SM_CMD_SHUTDOWN) {
+                dev_dbg(&dev->core, "%s:%d: unknown cmd (%u)\n",
+                        __func__, __LINE__, cmd.type);
+                return -EIO;
+        }
+
+        ps3_sys_manager_send_response(dev, 0);
+        return 0;
+}
+
+/**
+ * ps3_sys_manager_handle_msg - First stage msg handler.
+ *
+ * Can be called directly to manually poll vuart and pump message handler.
+ */
+
+static int ps3_sys_manager_handle_msg(struct ps3_system_bus_device *dev)
+{
+        int result;
+        struct ps3_sys_manager_header header;
+
+        result = ps3_vuart_read(dev, &header,
+                sizeof(struct ps3_sys_manager_header));
+
+        if(result)
+                return result;
+
+        if (header.version != 1) {
+                dev_dbg(&dev->core, "%s:%d: unsupported header version (%u)\n",
+                        __func__, __LINE__, header.version);
+                dump_sm_header(&header);
+                goto fail_header;
+        }
+
+        BUILD_BUG_ON(sizeof(header) != 16);
+
+        if (header.size != 16 || (header.payload_size != 8
+                && header.payload_size != 16)) {
+                dump_sm_header(&header);
+                BUG();
+        }
+
+        switch (header.service_id) {
+        case PS3_SM_SERVICE_ID_EXTERN_EVENT:
+                dev_dbg(&dev->core, "%s:%d: EVENT\n", __func__, __LINE__);
+                return ps3_sys_manager_handle_event(dev);
+        case PS3_SM_SERVICE_ID_COMMAND:
+                dev_dbg(&dev->core, "%s:%d: COMMAND\n", __func__, __LINE__);
+                return ps3_sys_manager_handle_cmd(dev);
+        case PS3_SM_SERVICE_ID_REQUEST_ERROR:
+                dev_dbg(&dev->core, "%s:%d: REQUEST_ERROR\n", __func__,
+                        __LINE__);
+                dump_sm_header(&header);
+                break;
+        default:
+                dev_dbg(&dev->core, "%s:%d: unknown service_id (%u)\n",
+                        __func__, __LINE__, header.service_id);
+                break;
+        }
+        goto fail_id;
+
+fail_header:
+        ps3_vuart_clear_rx_bytes(dev, 0);
+        return -EIO;
+fail_id:
+        ps3_vuart_clear_rx_bytes(dev, header.payload_size);
+        return -EIO;
+}
+
+/**
+ * ps3_sys_manager_final_power_off - The final platform machine_power_off routine.
+ *
+ * This routine never returns.  The routine disables asynchronous vuart reads
+ * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge
+ * the shutdown command sent from the system manager.  Soon after the
+ * acknowledgement is sent the lpar is destroyed by the HV.  This routine
+ * should only be called from ps3_power_off() through
+ * ps3_sys_manager_ops.power_off.
+ */
+
+static void ps3_sys_manager_final_power_off(struct ps3_system_bus_device *dev)
+{
+        BUG_ON(!dev);
+
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+
+        ps3_vuart_cancel_async(dev);
+
+        ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_SHUTDOWN,
+                PS3_SM_WAKE_DEFAULT);
+        ps3_sys_manager_send_request_shutdown(dev);
+
+        printk(KERN_EMERG "System Halted, OK to turn off power\n");
+
+        while(1)
+                ps3_sys_manager_handle_msg(dev);
+}
+
+/**
+ * ps3_sys_manager_final_restart - The final platform machine_restart routine.
+ *
+ * This routine never returns.  The routine disables asynchronous vuart reads
+ * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge
+ * the shutdown command sent from the system manager.  Soon after the
+ * acknowledgement is sent the lpar is destroyed by the HV.  This routine
+ * should only be called from ps3_restart() through ps3_sys_manager_ops.restart.
+ */
+
+static void ps3_sys_manager_final_restart(struct ps3_system_bus_device *dev)
+{
+        BUG_ON(!dev);
+
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+
+        /* Check if we got here via a power button event. */
+
+        if (ps3_sm_force_power_off) {
+                dev_dbg(&dev->core, "%s:%d: forcing poweroff\n",
+                        __func__, __LINE__);
+                ps3_sys_manager_final_power_off(dev);
+        }
+
+        ps3_vuart_cancel_async(dev);
+
+        ps3_sys_manager_send_attr(dev, 0);
+        ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_LPAR_REBOOT,
+                PS3_SM_WAKE_DEFAULT);
+        ps3_sys_manager_send_request_shutdown(dev);
+
+        printk(KERN_EMERG "System Halted, OK to turn off power\n");
+
+        while(1)
+                ps3_sys_manager_handle_msg(dev);
+}
+
+/**
+ * ps3_sys_manager_work - Asynchronous read handler.
+ *
+ * Signaled when PS3_SM_RX_MSG_LEN_MIN bytes arrive at the vuart port.
+ */
+
+static void ps3_sys_manager_work(struct ps3_system_bus_device *dev)
+{
+        ps3_sys_manager_handle_msg(dev);
+        ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN);
+}
+
+static int ps3_sys_manager_probe(struct ps3_system_bus_device *dev)
+{
+        int result;
+        struct ps3_sys_manager_ops ops;
+
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+
+        ops.power_off = ps3_sys_manager_final_power_off;
+        ops.restart = ps3_sys_manager_final_restart;
+        ops.dev = dev;
+
+        /* ps3_sys_manager_register_ops copies ops. */
+
+        ps3_sys_manager_register_ops(&ops);
+
+        result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL);
+        BUG_ON(result);
+
+        result = ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN);
+        BUG_ON(result);
+
+        return result;
+}
+
+static int ps3_sys_manager_remove(struct ps3_system_bus_device *dev)
+{
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+        return 0;
+}
+
+static void ps3_sys_manager_shutdown(struct ps3_system_bus_device *dev)
+{
+        dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
+}
+
+static struct ps3_vuart_port_driver ps3_sys_manager = {
+        .core.match_id = PS3_MATCH_ID_SYSTEM_MANAGER,
+        .core.core.name = "ps3_sys_manager",
+        .probe = ps3_sys_manager_probe,
+        .remove = ps3_sys_manager_remove,
+        .shutdown = ps3_sys_manager_shutdown,
+        .work = ps3_sys_manager_work,
+};
+
+static int __init ps3_sys_manager_init(void)
+{
+        if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+                return -ENODEV;
+
+        return ps3_vuart_port_driver_register(&ps3_sys_manager);
+}
+
+module_init(ps3_sys_manager_init);
+/* Module remove not supported. */
+
+MODULE_ALIAS(PS3_MODULE_ALIAS_SYSTEM_MANAGER);