drivers/ps3/sys-manager.c - kernel/msm - Gitiles

 /*
  *  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/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 asyncronous 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.
  */

 struct ps3_sys_manager_header {
 	/* version 1 */
 	u8 version;
 	u8 size;
 	u16 reserved_1;
 	u32 payload_size;
 	u16 service_id;
 	u16 reserved_2[3];
 };

 /**
  * @PS3_SM_RX_MSG_LEN - System manager received message length.
  *
  * Currently all messages received from the system manager are the same length
  * (16 bytes header + 16 bytes payload = 32 bytes).  This knowlege is used to
  * simplify the logic.
  */

 enum {
 	PS3_SM_RX_MSG_LEN = 32,
 };

 /**
  * enum ps3_sys_manager_service_id - Message header service_id.
  * @PS3_SM_SERVICE_ID_REQUEST:      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.
  */

 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_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_sys_manager_write - Helper to write a two part message to the vuart.
  *
  */

 static int ps3_sys_manager_write(struct ps3_vuart_port_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_vuart_port_device *dev,
 	enum ps3_sys_manager_attr attr)
 {
 	static const struct ps3_sys_manager_header header = {
 		.version = 1,
 		.size = 16,
 		.payload_size = 16,
 		.service_id = PS3_SM_SERVICE_ID_SET_ATTR,
 	};
 	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(&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_vuart_port_device *dev,
 	enum ps3_sys_manager_next_op op,
 	enum ps3_sys_manager_wake_source wake_source)
 {
 	static const struct ps3_sys_manager_header header = {
 		.version = 1,
 		.size = 16,
 		.payload_size = 16,
 		.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP,
 	};
 	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(&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 it the 'shutdown self' request.
  */

 static int ps3_sys_manager_send_request_shutdown(struct ps3_vuart_port_device *dev)
 {
 	static const struct ps3_sys_manager_header header = {
 		.version = 1,
 		.size = 16,
 		.payload_size = 16,
 		.service_id = PS3_SM_SERVICE_ID_REQUEST,
 	};
 	struct {
 		u8 version;
 		u8 type;
 		u8 gos_id;
 		u8 reserved_1[13];
 	} static const payload = {
 		.version = 1,
 		.type = 1, /* shutdown */
 		.gos_id = 0, /* self */
 	};

 	BUILD_BUG_ON(sizeof(payload) != 16);

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

 	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_vuart_port_device *dev,
 	u64 status)
 {
 	static const struct ps3_sys_manager_header header = {
 		.version = 1,
 		.size = 16,
 		.payload_size = 16,
 		.service_id = PS3_SM_SERVICE_ID_RESPONSE,
 	};
 	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(&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_vuart_port_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);

 	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__);
 		break;
 	case PS3_SM_EVENT_POWER_RELEASED:
 		dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n",
 			__func__, __LINE__, event.value);
 		kill_cad_pid(SIGINT, 1);
 		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_vuart_port_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));

 	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.
  *
  */

 static int ps3_sys_manager_handle_msg(struct ps3_vuart_port_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);
 		goto fail_header;
 	}

 	BUILD_BUG_ON(sizeof(header) != 16);
 	BUG_ON(header.size != 16);
 	BUG_ON(header.payload_size != 16);

 	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);
 	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_work - Asyncronous read handler.
  *
  * Signaled when a complete message arrives at the vuart port.
  */

 static void ps3_sys_manager_work(struct work_struct *work)
 {
 	struct ps3_vuart_port_device *dev = ps3_vuart_work_to_port_device(work);

 	ps3_sys_manager_handle_msg(dev);
 	ps3_vuart_read_async(dev, ps3_sys_manager_work, PS3_SM_RX_MSG_LEN);
 }

 struct {
 	struct ps3_vuart_port_device *dev;
 } static drv_priv;

 /**
  * ps3_sys_manager_restart - The final platform machine_restart routine.
  *
  * This routine never returns.  The routine disables asyncronous 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().
  */

 void ps3_sys_manager_restart(void)
 {
 	struct ps3_vuart_port_device *dev = drv_priv.dev;

 	BUG_ON(!drv_priv.dev);

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

 	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_power_off - The final platform machine_power_off routine.
  *
  * This routine never returns.  The routine disables asyncronous 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().
  */

 void ps3_sys_manager_power_off(void)
 {
 	struct ps3_vuart_port_device *dev = drv_priv.dev;

 	BUG_ON(!drv_priv.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);
 }

 static int ps3_sys_manager_probe(struct ps3_vuart_port_device *dev)
 {
 	int result;

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

 	BUG_ON(drv_priv.dev);
 	drv_priv.dev = dev;

 	result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL);
 	BUG_ON(result);

 	result = ps3_vuart_read_async(dev, ps3_sys_manager_work,
 		PS3_SM_RX_MSG_LEN);
 	BUG_ON(result);

 	return result;
 }

 static struct ps3_vuart_port_driver ps3_sys_manager = {
 	.match_id = PS3_MATCH_ID_SYSTEM_MANAGER,
 	.core = {
 		.name = "ps3_sys_manager",
 	},
 	.probe = ps3_sys_manager_probe,
 };

 static int __init ps3_sys_manager_init(void)
 {
 	return ps3_vuart_port_driver_register(&ps3_sys_manager);
 }

 module_init(ps3_sys_manager_init);
	/*
	* 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/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 asyncronous 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.
	*/

	struct ps3_sys_manager_header {
	/* version 1 */
	u8 version;
	u8 size;
	u16 reserved_1;
	u32 payload_size;
	u16 service_id;
	u16 reserved_2[3];
	};

	/**
	* @PS3_SM_RX_MSG_LEN - System manager received message length.
	*
	* Currently all messages received from the system manager are the same length
	* (16 bytes header + 16 bytes payload = 32 bytes). This knowlege is used to
	* simplify the logic.
	*/

	enum {
	PS3_SM_RX_MSG_LEN = 32,
	};

	/**
	* enum ps3_sys_manager_service_id - Message header service_id.
	* @PS3_SM_SERVICE_ID_REQUEST: 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.
	*/

	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_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_sys_manager_write - Helper to write a two part message to the vuart.
	*
	*/

	static int ps3_sys_manager_write(struct ps3_vuart_port_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_vuart_port_device *dev,
	enum ps3_sys_manager_attr attr)
	{
	static const struct ps3_sys_manager_header header = {
	.version = 1,
	.size = 16,
	.payload_size = 16,
	.service_id = PS3_SM_SERVICE_ID_SET_ATTR,
	};
	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(&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_vuart_port_device *dev,
	enum ps3_sys_manager_next_op op,
	enum ps3_sys_manager_wake_source wake_source)
	{
	static const struct ps3_sys_manager_header header = {
	.version = 1,
	.size = 16,
	.payload_size = 16,
	.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP,
	};
	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(&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 it the 'shutdown self' request.
	*/

	static int ps3_sys_manager_send_request_shutdown(struct ps3_vuart_port_device *dev)
	{
	static const struct ps3_sys_manager_header header = {
	.version = 1,
	.size = 16,
	.payload_size = 16,
	.service_id = PS3_SM_SERVICE_ID_REQUEST,
	};
	struct {
	u8 version;
	u8 type;
	u8 gos_id;
	u8 reserved_1[13];
	} static const payload = {
	.version = 1,
	.type = 1, /* shutdown */
	.gos_id = 0, /* self */
	};

	BUILD_BUG_ON(sizeof(payload) != 16);

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

	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_vuart_port_device *dev,
	u64 status)
	{
	static const struct ps3_sys_manager_header header = {
	.version = 1,
	.size = 16,
	.payload_size = 16,
	.service_id = PS3_SM_SERVICE_ID_RESPONSE,
	};
	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(&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_vuart_port_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);

	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__);
	break;
	case PS3_SM_EVENT_POWER_RELEASED:
	dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n",
	__func__, __LINE__, event.value);
	kill_cad_pid(SIGINT, 1);
	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_vuart_port_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));

	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.
	*
	*/

	static int ps3_sys_manager_handle_msg(struct ps3_vuart_port_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);
	goto fail_header;
	}

	BUILD_BUG_ON(sizeof(header) != 16);
	BUG_ON(header.size != 16);
	BUG_ON(header.payload_size != 16);

	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);
	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_work - Asyncronous read handler.
	*
	* Signaled when a complete message arrives at the vuart port.
	*/

	static void ps3_sys_manager_work(struct work_struct *work)
	{
	struct ps3_vuart_port_device *dev = ps3_vuart_work_to_port_device(work);

	ps3_sys_manager_handle_msg(dev);
	ps3_vuart_read_async(dev, ps3_sys_manager_work, PS3_SM_RX_MSG_LEN);
	}

	struct {
	struct ps3_vuart_port_device *dev;
	} static drv_priv;

	/**
	* ps3_sys_manager_restart - The final platform machine_restart routine.
	*
	* This routine never returns. The routine disables asyncronous 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().
	*/

	void ps3_sys_manager_restart(void)
	{
	struct ps3_vuart_port_device *dev = drv_priv.dev;

	BUG_ON(!drv_priv.dev);

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

	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_power_off - The final platform machine_power_off routine.
	*
	* This routine never returns. The routine disables asyncronous 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().
	*/

	void ps3_sys_manager_power_off(void)
	{
	struct ps3_vuart_port_device *dev = drv_priv.dev;

	BUG_ON(!drv_priv.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);
	}

	static int ps3_sys_manager_probe(struct ps3_vuart_port_device *dev)
	{
	int result;

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

	BUG_ON(drv_priv.dev);
	drv_priv.dev = dev;

	result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL);
	BUG_ON(result);

	result = ps3_vuart_read_async(dev, ps3_sys_manager_work,
	PS3_SM_RX_MSG_LEN);
	BUG_ON(result);

	return result;
	}

	static struct ps3_vuart_port_driver ps3_sys_manager = {
	.match_id = PS3_MATCH_ID_SYSTEM_MANAGER,
	.core = {
	.name = "ps3_sys_manager",
	},
	.probe = ps3_sys_manager_probe,
	};

	static int __init ps3_sys_manager_init(void)
	{
	return ps3_vuart_port_driver_register(&ps3_sys_manager);
	}

	module_init(ps3_sys_manager_init);