[SCSI] SCSI: Support Type C RAID controller

1. To support Type C RAID controller, ACB_ADAPTER_TYPE_C, i.e. PCI device
ID: 0x1880.
Signed-off-by: Nick Cheng< nick.cheng@areca.com.tw >
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

3 files changed, 1182 insertions, 573 deletions

diff --git a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
index c0861c05cd49..475c31ae985c 100644
--- a/drivers/scsi/arcmsr/arcmsr.h
+++ b/drivers/scsi/arcmsr/arcmsr.h
@@ -43,12 +43,11 @@
 *******************************************************************************
 */
 #include <linux/interrupt.h>
-
 struct device_attribute;
 /*The limit of outstanding scsi command that firmware can handle*/
 #define ARCMSR_MAX_OUTSTANDING_CMD						256
 #define ARCMSR_MAX_FREECCB_NUM							320
-#define ARCMSR_DRIVER_VERSION		     "Driver Version 1.20.00.15 2009/12/09"
+#define ARCMSR_DRIVER_VERSION		     "Driver Version 1.20.00.15 2010/02/02"
 #define ARCMSR_SCSI_INITIATOR_ID						255
 #define ARCMSR_MAX_XFER_SECTORS							512
 #define ARCMSR_MAX_XFER_SECTORS_B						4096
@@ -60,7 +59,8 @@ struct device_attribute;
 #define ARCMSR_DEFAULT_SG_ENTRIES						38
 #define ARCMSR_MAX_HBB_POSTQUEUE						264
 #define ARCMSR_MAX_XFER_LEN							0x26000 /* 152K */
-#define ARCMSR_CDB_SG_PAGE_LENGTH						256
+#define ARCMSR_CDB_SG_PAGE_LENGTH						256 
+#define SCSI_CMD_ARECA_SPECIFIC						0xE1
 #ifndef PCI_DEVICE_ID_ARECA_1880
 #define PCI_DEVICE_ID_ARECA_1880 0x1880
  #endif
@@ -138,9 +138,9 @@ struct CMD_MESSAGE_FIELD
 #define ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE \
 	ARECA_SATA_RAID | FUNCTION_FLUSH_ADAPTER_CACHE
 /* ARECA IOCTL ReturnCode */
-#define ARCMSR_MESSAGE_RETURNCODE_OK              0x00000001
-#define ARCMSR_MESSAGE_RETURNCODE_ERROR           0x00000006
-#define ARCMSR_MESSAGE_RETURNCODE_3F              0x0000003F
+#define ARCMSR_MESSAGE_RETURNCODE_OK		0x00000001
+#define ARCMSR_MESSAGE_RETURNCODE_ERROR		0x00000006
+#define ARCMSR_MESSAGE_RETURNCODE_3F		0x0000003F
 #define ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON	0x00000088
 /*
 *************************************************************
@@ -153,13 +153,13 @@ struct  SG32ENTRY
 {
 	__le32					length;
 	__le32					address;
-} __attribute__ ((packed));
+}__attribute__ ((packed));
 struct  SG64ENTRY
 {
 	__le32					length;
 	__le32					address;
 	__le32					addresshigh;
-} __attribute__ ((packed));
+}__attribute__ ((packed));
 /*
 ********************************************************************
 **      Q Buffer of IOP Message Transfer
@@ -186,9 +186,9 @@ struct FIRMWARE_INFO
 	char          model[8];			/*15, 60-67*/
 	char          firmware_ver[16];     	/*17, 68-83*/
 	char          device_map[16];		/*21, 84-99*/
-	uint32_t		cfgVersion;	/*25,100-103 Added for checking of new firmware capability*/
-	uint8_t		cfgSerial[16];		/*26,104-119*/
-	uint32_t		cfgPicStatus;	/*30,120-123*/
+	uint32_t		cfgVersion;               	/*25,100-103 Added for checking of new firmware capability*/
+	uint8_t		cfgSerial[16];           	/*26,104-119*/
+	uint32_t		cfgPicStatus;            	/*30,120-123*/	
 };
 /* signature of set and get firmware config */
 #define ARCMSR_SIGNATURE_GET_CONFIG		      0x87974060
@@ -212,11 +212,15 @@ struct FIRMWARE_INFO
 #define ARCMSR_CCBPOST_FLAG_SGL_BSIZE                 0x80000000
 #define ARCMSR_CCBPOST_FLAG_IAM_BIOS                  0x40000000
 #define ARCMSR_CCBREPLY_FLAG_IAM_BIOS                 0x40000000
-#define ARCMSR_CCBREPLY_FLAG_ERROR                    0x10000000
+#define ARCMSR_CCBREPLY_FLAG_ERROR_MODE0              0x10000000
+#define ARCMSR_CCBREPLY_FLAG_ERROR_MODE1              0x00000001
 /* outbound firmware ok */
 #define ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK             0x80000000
 /* ARC-1680 Bus Reset*/
 #define ARCMSR_ARC1680_BUS_RESET				0x00000003
+/* ARC-1880 Bus Reset*/
+#define ARCMSR_ARC1880_RESET_ADAPTER				0x00000024
+#define ARCMSR_ARC1880_DiagWrite_ENABLE			0x00000080
 
 /*
 ************************************************************************
@@ -273,6 +277,61 @@ struct FIRMWARE_INFO
 #define ARCMSR_MESSAGE_RBUFFER			      0x0000ff00
 /* iop message_rwbuffer for message command */
 #define ARCMSR_MESSAGE_RWBUFFER			      0x0000fa00
+/* 
+************************************************************************
+**                SPEC. for Areca HBC adapter
+************************************************************************
+*/
+#define ARCMSR_HBC_ISR_THROTTLING_LEVEL		12
+#define ARCMSR_HBC_ISR_MAX_DONE_QUEUE		20
+/* Host Interrupt Mask */
+#define ARCMSR_HBCMU_UTILITY_A_ISR_MASK		0x00000001 /* When clear, the Utility_A interrupt routes to the host.*/
+#define ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR_MASK	0x00000004 /* When clear, the General Outbound Doorbell interrupt routes to the host.*/
+#define ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR_MASK	0x00000008 /* When clear, the Outbound Post List FIFO Not Empty interrupt routes to the host.*/
+#define ARCMSR_HBCMU_ALL_INTMASKENABLE		0x0000000D /* disable all ISR */
+/* Host Interrupt Status */
+#define ARCMSR_HBCMU_UTILITY_A_ISR			0x00000001
+	/*
+	** Set when the Utility_A Interrupt bit is set in the Outbound Doorbell Register.
+	** It clears by writing a 1 to the Utility_A bit in the Outbound Doorbell Clear Register or through automatic clearing (if enabled).
+	*/
+#define ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR		0x00000004
+	/*
+	** Set if Outbound Doorbell register bits 30:1 have a non-zero
+	** value. This bit clears only when Outbound Doorbell bits
+	** 30:1 are ALL clear. Only a write to the Outbound Doorbell
+	** Clear register clears bits in the Outbound Doorbell register.
+	*/
+#define ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR	0x00000008
+	/*
+	** Set whenever the Outbound Post List Producer/Consumer
+	** Register (FIFO) is not empty. It clears when the Outbound
+	** Post List FIFO is empty.
+	*/
+#define ARCMSR_HBCMU_SAS_ALL_INT			0x00000010
+	/*
+	** This bit indicates a SAS interrupt from a source external to
+	** the PCIe core. This bit is not maskable.
+	*/
+	/* DoorBell*/
+#define ARCMSR_HBCMU_DRV2IOP_DATA_WRITE_OK			0x00000002
+#define ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK			0x00000004
+	/*inbound message 0 ready*/
+#define ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE		0x00000008
+	/*more than 12 request completed in a time*/
+#define ARCMSR_HBCMU_DRV2IOP_POSTQUEUE_THROTTLING		0x00000010
+#define ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK			0x00000002
+	/*outbound DATA WRITE isr door bell clear*/
+#define ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_DOORBELL_CLEAR	0x00000002
+#define ARCMSR_HBCMU_IOP2DRV_DATA_READ_OK			0x00000004
+	/*outbound DATA READ isr door bell clear*/
+#define ARCMSR_HBCMU_IOP2DRV_DATA_READ_DOORBELL_CLEAR	0x00000004
+	/*outbound message 0 ready*/
+#define ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE		0x00000008
+	/*outbound message cmd isr door bell clear*/
+#define ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR	0x00000008
+	/*ARCMSR_HBAMU_MESSAGE_FIRMWARE_OK*/
+#define ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK			0x80000000
 /*
 *******************************************************************************
 **    ARECA SCSI COMMAND DESCRIPTOR BLOCK size 0x1F8 (504)
@@ -310,7 +369,7 @@ struct ARCMSR_CDB
 		struct SG32ENTRY                sg32entry[1];
 		struct SG64ENTRY                sg64entry[1];
 	} u;
-} __attribute__ ((packed));
+};
 /*
 *******************************************************************************
 **     Messaging Unit (MU) of the Intel R 80331 I/O processor(Type A) and Type B processor
@@ -356,7 +415,81 @@ struct MessageUnit_B
 	uint32_t		__iomem *message_wbuffer;
 	uint32_t		__iomem *message_rbuffer;
 };
-
+/*
+*********************************************************************
+** LSI
+*********************************************************************
+*/
+struct MessageUnit_C{
+	uint32_t	message_unit_status;			/*0000 0003*/
+	uint32_t	slave_error_attribute;			/*0004 0007*/
+	uint32_t	slave_error_address;			/*0008 000B*/
+	uint32_t	posted_outbound_doorbell;		/*000C 000F*/
+	uint32_t	master_error_attribute;			/*0010 0013*/
+	uint32_t	master_error_address_low;		/*0014 0017*/
+	uint32_t	master_error_address_high;		/*0018 001B*/
+	uint32_t	hcb_size;				/*001C 001F*/
+	uint32_t	inbound_doorbell;			/*0020 0023*/
+	uint32_t	diagnostic_rw_data;			/*0024 0027*/
+	uint32_t	diagnostic_rw_address_low;		/*0028 002B*/
+	uint32_t	diagnostic_rw_address_high;		/*002C 002F*/
+	uint32_t	host_int_status;				/*0030 0033*/
+	uint32_t	host_int_mask;				/*0034 0037*/
+	uint32_t	dcr_data;				/*0038 003B*/
+	uint32_t	dcr_address;				/*003C 003F*/
+	uint32_t	inbound_queueport;			/*0040 0043*/
+	uint32_t	outbound_queueport;			/*0044 0047*/
+	uint32_t	hcb_pci_address_low;			/*0048 004B*/
+	uint32_t	hcb_pci_address_high;			/*004C 004F*/
+	uint32_t	iop_int_status;				/*0050 0053*/
+	uint32_t	iop_int_mask;				/*0054 0057*/
+	uint32_t	iop_inbound_queue_port;			/*0058 005B*/
+	uint32_t	iop_outbound_queue_port;		/*005C 005F*/
+	uint32_t	inbound_free_list_index;			/*0060 0063*/
+	uint32_t	inbound_post_list_index;			/*0064 0067*/
+	uint32_t	outbound_free_list_index;			/*0068 006B*/
+	uint32_t	outbound_post_list_index;			/*006C 006F*/
+	uint32_t	inbound_doorbell_clear;			/*0070 0073*/
+	uint32_t	i2o_message_unit_control;			/*0074 0077*/
+	uint32_t	last_used_message_source_address_low;	/*0078 007B*/
+	uint32_t	last_used_message_source_address_high;	/*007C 007F*/
+	uint32_t	pull_mode_data_byte_count[4];		/*0080 008F*/
+	uint32_t	message_dest_address_index;		/*0090 0093*/
+	uint32_t	done_queue_not_empty_int_counter_timer;	/*0094 0097*/
+	uint32_t	utility_A_int_counter_timer;		/*0098 009B*/
+	uint32_t	outbound_doorbell;			/*009C 009F*/
+	uint32_t	outbound_doorbell_clear;			/*00A0 00A3*/
+	uint32_t	message_source_address_index;		/*00A4 00A7*/
+	uint32_t	message_done_queue_index;		/*00A8 00AB*/
+	uint32_t	reserved0;				/*00AC 00AF*/
+	uint32_t	inbound_msgaddr0;			/*00B0 00B3*/
+	uint32_t	inbound_msgaddr1;			/*00B4 00B7*/
+	uint32_t	outbound_msgaddr0;			/*00B8 00BB*/
+	uint32_t	outbound_msgaddr1;			/*00BC 00BF*/
+	uint32_t	inbound_queueport_low;			/*00C0 00C3*/
+	uint32_t	inbound_queueport_high;			/*00C4 00C7*/
+	uint32_t	outbound_queueport_low;			/*00C8 00CB*/
+	uint32_t	outbound_queueport_high;		/*00CC 00CF*/
+	uint32_t	iop_inbound_queue_port_low;		/*00D0 00D3*/
+	uint32_t	iop_inbound_queue_port_high;		/*00D4 00D7*/
+	uint32_t	iop_outbound_queue_port_low;		/*00D8 00DB*/
+	uint32_t	iop_outbound_queue_port_high;		/*00DC 00DF*/
+	uint32_t	message_dest_queue_port_low;		/*00E0 00E3*/
+	uint32_t	message_dest_queue_port_high;		/*00E4 00E7*/
+	uint32_t	last_used_message_dest_address_low;	/*00E8 00EB*/
+	uint32_t	last_used_message_dest_address_high;	/*00EC 00EF*/
+	uint32_t	message_done_queue_base_address_low;	/*00F0 00F3*/
+	uint32_t	message_done_queue_base_address_high;	/*00F4 00F7*/
+	uint32_t	host_diagnostic;				/*00F8 00FB*/
+	uint32_t	write_sequence;				/*00FC 00FF*/
+	uint32_t	reserved1[34];				/*0100 0187*/
+	uint32_t	reserved2[1950];				/*0188 1FFF*/
+	uint32_t	message_wbuffer[32];			/*2000 207F*/
+	uint32_t	reserved3[32];				/*2080 20FF*/
+	uint32_t	message_rbuffer[32];			/*2100 217F*/
+	uint32_t	reserved4[32];				/*2180 21FF*/
+	uint32_t	msgcode_rwbuffer[256];			/*2200 23FF*/
+};
 /*
 *******************************************************************************
 **                 Adapter Control Block
@@ -374,11 +507,14 @@ struct AdapterControlBlock
 	unsigned long			vir2phy_offset;
 	/* Offset is used in making arc cdb physical to virtual calculations */
 	uint32_t			outbound_int_enable;
+	uint32_t			cdb_phyaddr_hi32;
+	uint32_t			reg_mu_acc_handle0;
 	spinlock_t                      			eh_lock;
 	spinlock_t                      			ccblist_lock;
 	union {
-		struct MessageUnit_A __iomem *	pmuA;
-		struct MessageUnit_B *		pmuB;
+		struct MessageUnit_A __iomem *pmuA;
+		struct MessageUnit_B 	*pmuB;
+		struct MessageUnit_C __iomem *pmuC;
 	};
 	/* message unit ATU inbound base address0 */
 	void __iomem *mem_base0;
@@ -399,6 +535,8 @@ struct AdapterControlBlock
 	/* message clear rqbuffer */
 	#define ACB_F_MESSAGE_WQBUFFER_READED   0x0040
 	#define ACB_F_BUS_RESET               	0x0080
+	#define ACB_F_BUS_HANG_ON		0x0800/* need hardware reset bus */
+
 	#define ACB_F_IOP_INITED              	0x0100
 	/* iop init */
 	#define ACB_F_ABORT				0x0200
@@ -441,9 +579,9 @@ struct AdapterControlBlock
 	uint32_t			firm_numbers_queue;
 	uint32_t			firm_sdram_size;
 	uint32_t			firm_hd_channels;
-	uint32_t                           	firm_cfg_version;
-	char				firm_model[12];
-	char				firm_version[20];
+	uint32_t                           	firm_cfg_version;	
+	char			firm_model[12];
+	char			firm_version[20];
 	char			device_map[20];			/*21,84-99*/
 	struct work_struct 		arcmsr_do_message_isr_bh;
 	struct timer_list		eternal_timer;
@@ -460,31 +598,31 @@ struct AdapterControlBlock
 **             this CCB length must be 32 bytes boundary
 *******************************************************************************
 */
-struct CommandControlBlock
-{
+struct CommandControlBlock{
 	/*x32:sizeof struct_CCB=(32+60)byte, x64:sizeof struct_CCB=(64+60)byte*/
 	struct list_head		list;				/*x32: 8byte, x64: 16byte*/
 	struct scsi_cmnd		*pcmd;				/*8 bytes pointer of linux scsi command */
 	struct AdapterControlBlock	*acb;				/*x32: 4byte, x64: 8byte*/
-	uint32_t			shifted_cdb_phyaddr;		/*x32: 4byte, x64: 4byte*/
+	uint32_t			cdb_phyaddr_pattern;		/*x32: 4byte, x64: 4byte*/
+	uint32_t			arc_cdb_size;			/*x32:4byte,x64:4byte*/
 	uint16_t			ccb_flags;			/*x32: 2byte, x64: 2byte*/
-	#define		CCB_FLAG_READ			0x0000
-	#define		CCB_FLAG_WRITE			0x0001
-	#define		CCB_FLAG_ERROR			0x0002
-	#define		CCB_FLAG_FLUSHCACHE		0x0004
-	#define		CCB_FLAG_MASTER_ABORTED		0x0008
+	#define			CCB_FLAG_READ			0x0000
+	#define			CCB_FLAG_WRITE		0x0001
+	#define			CCB_FLAG_ERROR		0x0002
+	#define			CCB_FLAG_FLUSHCACHE		0x0004
+	#define			CCB_FLAG_MASTER_ABORTED	0x0008	
 	uint16_t                        	startdone;			/*x32:2byte,x32:2byte*/
-	#define		ARCMSR_CCB_DONE			0x0000
-	#define		ARCMSR_CCB_START		0x55AA
-	#define		ARCMSR_CCB_ABORTED		0xAA55
-	#define		ARCMSR_CCB_ILLEGAL		0xFFFF
+	#define			ARCMSR_CCB_DONE   	        	0x0000
+	#define			ARCMSR_CCB_START		0x55AA
+	#define			ARCMSR_CCB_ABORTED		0xAA55
+	#define			ARCMSR_CCB_ILLEGAL		0xFFFF
 	#if BITS_PER_LONG == 64
 	/*  ======================512+64 bytes========================  */
-		uint32_t                        	reserved[6];		/*24 byte*/
-#else
+		uint32_t                        	reserved[5];		/*24 byte*/
+	#else
 	/*  ======================512+32 bytes========================  */
-		uint32_t                        	reserved[2];		/*8  byte*/
-#endif
+		uint32_t                        	reserved;		/*8  byte*/
+	#endif
 	/*  =======================================================   */
 	struct ARCMSR_CDB		arcmsr_cdb;
 };
diff --git a/drivers/scsi/arcmsr/arcmsr_attr.c b/drivers/scsi/arcmsr/arcmsr_attr.c
index 07fdfe57e38e..69f8346aa288 100644
--- a/drivers/scsi/arcmsr/arcmsr_attr.c
+++ b/drivers/scsi/arcmsr/arcmsr_attr.c
@@ -59,8 +59,7 @@
 
 struct device_attribute *arcmsr_host_attrs[];
 
-static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
-					     struct kobject *kobj,
+static ssize_t arcmsr_sysfs_iop_message_read(struct kobject *kobj,
 					     struct bin_attribute *bin,
 					     char *buf, loff_t off,
 					     size_t count)
@@ -106,8 +105,7 @@ static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
 	return (allxfer_len);
 }
 
-static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
-					      struct kobject *kobj,
+static ssize_t arcmsr_sysfs_iop_message_write(struct kobject *kobj,
 					      struct bin_attribute *bin,
 					      char *buf, loff_t off,
 					      size_t count)
@@ -155,8 +153,7 @@ static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
 	}
 }
 
-static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
-					      struct kobject *kobj,
+static ssize_t arcmsr_sysfs_iop_message_clear(struct kobject *kobj,
 					      struct bin_attribute *bin,
 					      char *buf, loff_t off,
 					      size_t count)
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index ba33473b27a1..95a895dd4f13 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -71,11 +71,11 @@
 #include <scsi/scsicam.h>
 #include "arcmsr.h"
 MODULE_AUTHOR("Nick Cheng <support@areca.com.tw>");
-MODULE_DESCRIPTION("ARECA (ARC11xx/12xx/16xx) SATA/SAS RAID Host Bus Adapter");
+MODULE_DESCRIPTION("ARECA (ARC11xx/12xx/16xx/1880) SATA/SAS RAID Host Bus Adapter");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_VERSION(ARCMSR_DRIVER_VERSION);
-static int sleeptime = 20;
-static int retrycount = 12;
+static int sleeptime = 10;
+static int retrycount = 30;
 wait_queue_head_t wait_q;
 static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
 					struct scsi_cmnd *cmd);
@@ -99,10 +99,12 @@ static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb);
 static void arcmsr_request_device_map(unsigned long pacb);
 static void arcmsr_request_hba_device_map(struct AdapterControlBlock *acb);
 static void arcmsr_request_hbb_device_map(struct AdapterControlBlock *acb);
+static void arcmsr_request_hbc_device_map(struct AdapterControlBlock *acb);
 static void arcmsr_message_isr_bh_fn(struct work_struct *work);
 static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb);
 static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb);
-
+static void arcmsr_hbc_message_isr(struct AdapterControlBlock *pACB);
+static void arcmsr_hardware_reset(struct AdapterControlBlock *acb);
 static const char *arcmsr_info(struct Scsi_Host *);
 static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
 static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev,
@@ -119,18 +121,18 @@ static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev,
 
 static struct scsi_host_template arcmsr_scsi_host_template = {
 	.module			= THIS_MODULE,
-	.name			= "ARCMSR ARECA SATA/SAS RAID Host Bus Adapter"
-							ARCMSR_DRIVER_VERSION,
+	.name			= "ARCMSR ARECA SATA/SAS RAID Controller"
+				ARCMSR_DRIVER_VERSION,
 	.info			= arcmsr_info,
 	.queuecommand		= arcmsr_queue_command,
-	.eh_abort_handler	= arcmsr_abort,
+	.eh_abort_handler		= arcmsr_abort,
 	.eh_bus_reset_handler	= arcmsr_bus_reset,
 	.bios_param		= arcmsr_bios_param,
 	.change_queue_depth	= arcmsr_adjust_disk_queue_depth,
 	.can_queue		= ARCMSR_MAX_FREECCB_NUM,
-	.this_id		= ARCMSR_SCSI_INITIATOR_ID,
-	.sg_tablesize	        	= ARCMSR_DEFAULT_SG_ENTRIES,
-	.max_sectors    	    	= ARCMSR_MAX_XFER_SECTORS_C,
+	.this_id			= ARCMSR_SCSI_INITIATOR_ID,
+	.sg_tablesize	        	= ARCMSR_DEFAULT_SG_ENTRIES, 
+	.max_sectors    	    	= ARCMSR_MAX_XFER_SECTORS_C, 
 	.cmd_per_lun		= ARCMSR_MAX_CMD_PERLUN,
 	.use_clustering		= ENABLE_CLUSTERING,
 	.shost_attrs		= arcmsr_host_attrs,
@@ -160,22 +162,45 @@ static struct pci_device_id arcmsr_device_id_table[] = {
 MODULE_DEVICE_TABLE(pci, arcmsr_device_id_table);
 static struct pci_driver arcmsr_pci_driver = {
 	.name			= "arcmsr",
-	.id_table		= arcmsr_device_id_table,
+	.id_table			= arcmsr_device_id_table,
 	.probe			= arcmsr_probe,
 	.remove			= arcmsr_remove,
 	.shutdown		= arcmsr_shutdown,
 };
+/*
+****************************************************************************
+****************************************************************************
+*/
+int arcmsr_sleep_for_bus_reset(struct scsi_cmnd *cmd)
+{
+		struct Scsi_Host *shost = NULL;
+		int i, isleep;
+		shost = cmd->device->host;
+		isleep = sleeptime / 10;
+		if (isleep > 0) {
+			for (i = 0; i < isleep; i++) {
+				msleep(10000);
+			}
+		}
 
-static void arcmsr_free_mu(struct AdapterControlBlock *acb)
+		isleep = sleeptime % 10;
+		if (isleep > 0) {
+			msleep(isleep*1000);
+		}
+		printk(KERN_NOTICE "wake-up\n");
+		return 0;
+}
+
+static void arcmsr_free_hbb_mu(struct AdapterControlBlock *acb)
 {
 	switch (acb->adapter_type) {
 	case ACB_ADAPTER_TYPE_A:
+	case ACB_ADAPTER_TYPE_C:
 		break;
 	case ACB_ADAPTER_TYPE_B:{
-		struct MessageUnit_B *reg = acb->pmuB;
-			dma_free_coherent(&acb->pdev->dev,
-				sizeof(struct MessageUnit_B),
-				reg, acb->dma_coherent_handle_hbb_mu);
+		dma_free_coherent(&acb->pdev->dev,
+			sizeof(struct MessageUnit_B),
+			acb->pmuB, acb->dma_coherent_handle_hbb_mu);
 	}
 	}
 }
@@ -183,10 +208,9 @@ static void arcmsr_free_mu(struct AdapterControlBlock *acb)
 static bool arcmsr_remap_pciregion(struct AdapterControlBlock *acb)
 {
 	struct pci_dev *pdev = acb->pdev;
-
-	switch (acb->adapter_type) {
+	switch (acb->adapter_type){
 	case ACB_ADAPTER_TYPE_A:{
-		acb->pmuA = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+		acb->pmuA = ioremap(pci_resource_start(pdev,0), pci_resource_len(pdev,0));
 		if (!acb->pmuA) {
 			printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
 			return false;
@@ -208,6 +232,19 @@ static bool arcmsr_remap_pciregion(struct AdapterControlBlock *acb)
 		}
 		acb->mem_base0 = mem_base0;
 		acb->mem_base1 = mem_base1;
+		break;
+	}
+	case ACB_ADAPTER_TYPE_C:{
+		acb->pmuC = ioremap_nocache(pci_resource_start(pdev, 1), pci_resource_len(pdev, 1));
+		if (!acb->pmuC) {
+			printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
+			return false;
+		}
+		if (readl(&acb->pmuC->outbound_doorbell) & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
+			writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &acb->pmuC->outbound_doorbell_clear);/*clear interrupt*/
+			return true;
+		}
+		break;
 	}
 	}
 	return true;
@@ -216,13 +253,19 @@ static bool arcmsr_remap_pciregion(struct AdapterControlBlock *acb)
 static void arcmsr_unmap_pciregion(struct AdapterControlBlock *acb)
 {
 	switch (acb->adapter_type) {
-		case ACB_ADAPTER_TYPE_A:{
-			iounmap(acb->pmuA);
-		}
-		case ACB_ADAPTER_TYPE_B:{
-			iounmap(acb->mem_base0);
-			iounmap(acb->mem_base1);
-		}
+	case ACB_ADAPTER_TYPE_A:{
+		iounmap(acb->pmuA);
+	}
+	break;
+	case ACB_ADAPTER_TYPE_B:{
+		iounmap(acb->mem_base0);
+		iounmap(acb->mem_base1);
+	}
+
+	break;
+	case ACB_ADAPTER_TYPE_C:{
+		iounmap(acb->pmuC);
+	}
 	}
 }
 
@@ -270,34 +313,37 @@ static void arcmsr_define_adapter_type(struct AdapterControlBlock *acb)
 	pci_read_config_word(pdev, PCI_DEVICE_ID, &dev_id);
 	acb->dev_id = dev_id;
 	switch (dev_id) {
-	case 0x1201 : {
+	case 0x1880: {
+		acb->adapter_type = ACB_ADAPTER_TYPE_C;
+		}
+		break;
+	case 0x1201: {
 		acb->adapter_type = ACB_ADAPTER_TYPE_B;
 		}
 		break;
 
-	default : acb->adapter_type = ACB_ADAPTER_TYPE_A;
+	default: acb->adapter_type = ACB_ADAPTER_TYPE_A;
 	}
-}
+}	
 
 static uint8_t arcmsr_hba_wait_msgint_ready(struct AdapterControlBlock *acb)
 {
 	struct MessageUnit_A __iomem *reg = acb->pmuA;
 	uint32_t Index;
 	uint8_t Retries = 0x00;
-
 	do {
 		for (Index = 0; Index < 100; Index++) {
 			if (readl(&reg->outbound_intstatus) &
 					ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
 				writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT,
 					&reg->outbound_intstatus);
-				return 0x00;
+				return true;
 			}
 			msleep(10);
-		} /*max 1 seconds*/
+		}/*max 1 seconds*/
 
 	} while (Retries++ < 20);/*max 20 sec*/
-	return 0xff;
+	return false;
 }
 
 static uint8_t arcmsr_hbb_wait_msgint_ready(struct AdapterControlBlock *acb)
@@ -305,7 +351,6 @@ static uint8_t arcmsr_hbb_wait_msgint_ready(struct AdapterControlBlock *acb)
 	struct MessageUnit_B *reg = acb->pmuB;
 	uint32_t Index;
 	uint8_t Retries = 0x00;
-
 	do {
 		for (Index = 0; Index < 100; Index++) {
 			if (readl(reg->iop2drv_doorbell)
@@ -313,23 +358,39 @@ static uint8_t arcmsr_hbb_wait_msgint_ready(struct AdapterControlBlock *acb)
 				writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN
 					, reg->iop2drv_doorbell);
 				writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT, reg->drv2iop_doorbell);
-				return 0x00;
+				return true;
 			}
 			msleep(10);
-		} /*max 1 seconds*/
+		}/*max 1 seconds*/
 
 	} while (Retries++ < 20);/*max 20 sec*/
-	return 0xff;
+	return false;
 }
 
+static uint8_t arcmsr_hbc_wait_msgint_ready(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *phbcmu = (struct MessageUnit_C *)pACB->pmuC;
+	unsigned char Retries = 0x00;
+	uint32_t Index;
+	do {
+		for (Index = 0; Index < 100; Index++) {
+			if (readl(&phbcmu->outbound_doorbell) & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
+				writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &phbcmu->outbound_doorbell_clear);/*clear interrupt*/
+				return true;
+			}
+			/* one us delay	*/
+			msleep(10);
+		} /*max 1 seconds*/
+	} while (Retries++ < 20); /*max 20 sec*/
+	return false;
+}
 static void arcmsr_flush_hba_cache(struct AdapterControlBlock *acb)
 {
 	struct MessageUnit_A __iomem *reg = acb->pmuA;
 	int retry_count = 30;
-
 	writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
 	do {
-		if (!arcmsr_hba_wait_msgint_ready(acb))
+		if (arcmsr_hba_wait_msgint_ready(acb))
 			break;
 		else {
 			retry_count--;
@@ -343,10 +404,9 @@ static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb)
 {
 	struct MessageUnit_B *reg = acb->pmuB;
 	int retry_count = 30;
-
 	writel(ARCMSR_MESSAGE_FLUSH_CACHE, reg->drv2iop_doorbell);
 	do {
-		if (!arcmsr_hbb_wait_msgint_ready(acb))
+		if (arcmsr_hbb_wait_msgint_ready(acb))
 			break;
 		else {
 			retry_count--;
@@ -356,6 +416,23 @@ static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb)
 	} while (retry_count != 0);
 }
 
+static void arcmsr_flush_hbc_cache(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *reg = (struct MessageUnit_C *)pACB->pmuC;
+	int retry_count = 30;/* enlarge wait flush adapter cache time: 10 minute */
+	writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
+	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+	do {
+		if (arcmsr_hbc_wait_msgint_ready(pACB)) {
+			break;
+		} else {
+			retry_count--;
+			printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
+			timeout,retry count down = %d \n", pACB->host->host_no, retry_count);
+		}
+	} while (retry_count != 0);
+	return;
+}
 static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
 {
 	switch (acb->adapter_type) {
@@ -368,151 +445,94 @@ static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
 	case ACB_ADAPTER_TYPE_B: {
 		arcmsr_flush_hbb_cache(acb);
 		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		arcmsr_flush_hbc_cache(acb);
+		}
 	}
 }
 
 static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
 {
-		struct pci_dev *pdev = acb->pdev;
-	switch (acb->adapter_type) {
-		case ACB_ADAPTER_TYPE_A: {
-
-		void *dma_coherent;
-			dma_addr_t dma_coherent_handle;
-		struct CommandControlBlock *ccb_tmp;
-			int i = 0, j = 0;
-			dma_addr_t cdb_phyaddr;
-			unsigned long roundup_ccbsize = 0;
-			unsigned long max_xfer_len;
-			unsigned long max_sg_entrys;
-			uint32_t  firm_config_version;
-
-			for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
-				for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
-					acb->devstate[i][j] = ARECA_RAID_GONE;
-
-			max_xfer_len = ARCMSR_MAX_XFER_LEN;
-			max_sg_entrys = ARCMSR_DEFAULT_SG_ENTRIES;
-			firm_config_version = acb->firm_cfg_version;
-			if ((firm_config_version & 0xFF) >= 3) {
-				max_xfer_len = (ARCMSR_CDB_SG_PAGE_LENGTH << ((firm_config_version >> 8) & 0xFF)) * 1024;/* max 16M byte */
-				max_sg_entrys = (max_xfer_len/4096);
-			}
-			acb->host->max_sectors = max_xfer_len/512;
-			acb->host->sg_tablesize = max_sg_entrys;
-			roundup_ccbsize = roundup(sizeof(struct CommandControlBlock) + max_sg_entrys * sizeof(struct SG64ENTRY), 32);
-			acb->uncache_size = roundup_ccbsize * ARCMSR_MAX_FREECCB_NUM;
-			dma_coherent = dma_alloc_coherent(&pdev->dev, acb->uncache_size, &dma_coherent_handle, GFP_KERNEL);
-		if (!dma_coherent) {
-				printk(KERN_NOTICE "arcmsr%d: dma_alloc_coherent got error \n", acb->host->host_no);
-			return -ENOMEM;
-		}
-			memset(dma_coherent, 0, acb->uncache_size);
-		acb->dma_coherent = dma_coherent;
-		acb->dma_coherent_handle = dma_coherent_handle;
-		ccb_tmp = (struct CommandControlBlock *)dma_coherent;
-			acb->vir2phy_offset = (unsigned long)dma_coherent - (unsigned long)dma_coherent_handle;
-		for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
-				cdb_phyaddr = dma_coherent_handle + offsetof(struct CommandControlBlock, arcmsr_cdb);
-				ccb_tmp->shifted_cdb_phyaddr = cdb_phyaddr >> 5;
-			acb->pccb_pool[i] = ccb_tmp;
-				ccb_tmp->acb = acb;
-				INIT_LIST_HEAD(&ccb_tmp->list);
-			list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
-				ccb_tmp = (struct CommandControlBlock *)((unsigned long)ccb_tmp + roundup_ccbsize);
-				dma_coherent_handle = dma_coherent_handle + roundup_ccbsize;
-		}
-		break;
-		}
-	case ACB_ADAPTER_TYPE_B: {
-
-		void *dma_coherent;
-			dma_addr_t dma_coherent_handle;
-		struct CommandControlBlock *ccb_tmp;
-			uint32_t cdb_phyaddr;
-			unsigned int roundup_ccbsize = 0;
-			unsigned long max_xfer_len;
-			unsigned long max_sg_entrys;
-			unsigned long firm_config_version;
-			unsigned long max_freeccb_num = 0;
-			int i = 0, j = 0;
-
-			max_freeccb_num = ARCMSR_MAX_FREECCB_NUM;
-			max_xfer_len = ARCMSR_MAX_XFER_LEN;
-			max_sg_entrys = ARCMSR_DEFAULT_SG_ENTRIES;
-			firm_config_version = acb->firm_cfg_version;
-			if ((firm_config_version & 0xFF) >= 3) {
-				max_xfer_len = (ARCMSR_CDB_SG_PAGE_LENGTH <<
-						((firm_config_version >> 8) & 0xFF)) * 1024;/* max 16M byte */
-				max_sg_entrys = (max_xfer_len/4096);/* max 4097 sg entry*/
-			}
-			acb->host->max_sectors = max_xfer_len / 512;
-			acb->host->sg_tablesize = max_sg_entrys;
-			roundup_ccbsize = roundup(sizeof(struct CommandControlBlock)+
-				(max_sg_entrys - 1) * sizeof(struct SG64ENTRY), 32);
-			acb->uncache_size = roundup_ccbsize * ARCMSR_MAX_FREECCB_NUM;
-			dma_coherent = dma_alloc_coherent(&pdev->dev, acb->uncache_size,
-			&dma_coherent_handle, GFP_KERNEL);
-
-			if (!dma_coherent) {
-				printk(KERN_NOTICE "DMA allocation failed...........................\n");
-				return -ENOMEM;
-			}
-			memset(dma_coherent, 0, acb->uncache_size);
-		acb->dma_coherent = dma_coherent;
-		acb->dma_coherent_handle = dma_coherent_handle;
-		ccb_tmp = (struct CommandControlBlock *)dma_coherent;
-			acb->vir2phy_offset = (unsigned long)dma_coherent -
-					(unsigned long)dma_coherent_handle;
-		for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
-				cdb_phyaddr = dma_coherent_handle +
-					offsetof(struct CommandControlBlock, arcmsr_cdb);
-				ccb_tmp->shifted_cdb_phyaddr = cdb_phyaddr >> 5;
-			acb->pccb_pool[i] = ccb_tmp;
-				ccb_tmp->acb = acb;
-				INIT_LIST_HEAD(&ccb_tmp->list);
-			list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
-				ccb_tmp = (struct CommandControlBlock *)((unsigned long)ccb_tmp +
-									roundup_ccbsize);
-				dma_coherent_handle = dma_coherent_handle + roundup_ccbsize;
-		}
-		for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
-			for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
-					acb->devstate[i][j] = ARECA_RAID_GONE;
-		}
-		break;
+	struct pci_dev *pdev = acb->pdev;
+	void *dma_coherent;
+	dma_addr_t dma_coherent_handle;
+	struct CommandControlBlock *ccb_tmp;
+	int i = 0, j = 0;
+	dma_addr_t cdb_phyaddr;
+	unsigned long roundup_ccbsize = 0, offset;
+	unsigned long max_xfer_len;
+	unsigned long max_sg_entrys;
+	uint32_t  firm_config_version;
+	for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
+		for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
+			acb->devstate[i][j] = ARECA_RAID_GONE;
+
+	max_xfer_len = ARCMSR_MAX_XFER_LEN;
+	max_sg_entrys = ARCMSR_DEFAULT_SG_ENTRIES;
+	firm_config_version = acb->firm_cfg_version;
+	if((firm_config_version & 0xFF) >= 3){
+		max_xfer_len = (ARCMSR_CDB_SG_PAGE_LENGTH << ((firm_config_version >> 8) & 0xFF)) * 1024;/* max 4M byte */
+		max_sg_entrys = (max_xfer_len/4096);	
+	}
+	acb->host->max_sectors = max_xfer_len/512;
+	acb->host->sg_tablesize = max_sg_entrys;
+	roundup_ccbsize = roundup(sizeof(struct CommandControlBlock) + (max_sg_entrys - 1) * sizeof(struct SG64ENTRY), 32);
+	acb->uncache_size = roundup_ccbsize * ARCMSR_MAX_FREECCB_NUM + 32;
+	dma_coherent = dma_alloc_coherent(&pdev->dev, acb->uncache_size, &dma_coherent_handle, GFP_KERNEL);
+	if(!dma_coherent){
+		printk(KERN_NOTICE "arcmsr%d: dma_alloc_coherent got error \n", acb->host->host_no);
+		return -ENOMEM;
+	}
+	acb->dma_coherent = dma_coherent;
+	acb->dma_coherent_handle = dma_coherent_handle;
+	memset(dma_coherent, 0, acb->uncache_size);
+	offset = roundup((unsigned long)dma_coherent, 32) - (unsigned long)dma_coherent;
+	dma_coherent_handle = dma_coherent_handle + offset;
+	dma_coherent = (struct CommandControlBlock *)dma_coherent + offset;
+	ccb_tmp = dma_coherent;
+	acb->vir2phy_offset = (unsigned long)dma_coherent - (unsigned long)dma_coherent_handle;
+	for(i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++){
+		cdb_phyaddr = dma_coherent_handle + offsetof(struct CommandControlBlock, arcmsr_cdb);
+		ccb_tmp->cdb_phyaddr_pattern = ((acb->adapter_type == ACB_ADAPTER_TYPE_C) ? cdb_phyaddr : (cdb_phyaddr >> 5));
+		acb->pccb_pool[i] = ccb_tmp;
+		ccb_tmp->acb = acb;
+		INIT_LIST_HEAD(&ccb_tmp->list);
+		list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
+		ccb_tmp = (struct CommandControlBlock *)((unsigned long)ccb_tmp + roundup_ccbsize);
+		dma_coherent_handle = dma_coherent_handle + roundup_ccbsize;
 	}
 	return 0;
 }
-static void arcmsr_message_isr_bh_fn(struct work_struct *work)
-{
-	struct AdapterControlBlock *acb = container_of(work, struct AdapterControlBlock, arcmsr_do_message_isr_bh);
 
+static void arcmsr_message_isr_bh_fn(struct work_struct *work) 
+{
+	struct AdapterControlBlock *acb = container_of(work,struct AdapterControlBlock, arcmsr_do_message_isr_bh);
 	switch (acb->adapter_type) {
 		case ACB_ADAPTER_TYPE_A: {
 
 			struct MessageUnit_A __iomem *reg  = acb->pmuA;
 			char *acb_dev_map = (char *)acb->device_map;
-			uint32_t __iomem *signature = (uint32_t __iomem *) (&reg->message_rwbuffer[0]);
-			char __iomem *devicemap = (char __iomem *) (&reg->message_rwbuffer[21]);
+			uint32_t __iomem *signature = (uint32_t __iomem*) (&reg->message_rwbuffer[0]);
+			char __iomem *devicemap = (char __iomem*) (&reg->message_rwbuffer[21]);
 			int target, lun;
 			struct scsi_device *psdev;
 			char diff;
 
 			atomic_inc(&acb->rq_map_token);
 			if (readl(signature) == ARCMSR_SIGNATURE_GET_CONFIG) {
-				for (target = 0; target < ARCMSR_MAX_TARGETID - 1; target++) {
+				for(target = 0; target < ARCMSR_MAX_TARGETID -1; target++) {
 					diff = (*acb_dev_map)^readb(devicemap);
 					if (diff != 0) {
 						char temp;
 						*acb_dev_map = readb(devicemap);
-						temp = *acb_dev_map;
-						for (lun = 0; lun < ARCMSR_MAX_TARGETLUN; lun++) {
-							if ((temp & 0x01) == 1 && (diff & 0x01) == 1) {
+						temp =*acb_dev_map;
+						for(lun = 0; lun < ARCMSR_MAX_TARGETLUN; lun++) {
+							if((temp & 0x01)==1 && (diff & 0x01) == 1) {	
 								scsi_add_device(acb->host, 0, target, lun);
-							} else if ((temp & 0x01) == 0 && (diff & 0x01) == 1) {
+							}else if((temp & 0x01) == 0 && (diff & 0x01) == 1) {
 								psdev = scsi_device_lookup(acb->host, 0, target, lun);
-								if (psdev != NULL) {
+								if (psdev != NULL ) {
 									scsi_remove_device(psdev);
 									scsi_device_put(psdev);
 								}
@@ -531,8 +551,45 @@ static void arcmsr_message_isr_bh_fn(struct work_struct *work)
 		case ACB_ADAPTER_TYPE_B: {
 			struct MessageUnit_B *reg  = acb->pmuB;
 			char *acb_dev_map = (char *)acb->device_map;
-			uint32_t __iomem *signature = (uint32_t __iomem *)(&reg->message_rwbuffer[0]);
-			char __iomem *devicemap = (char __iomem *)(&reg->message_rwbuffer[21]);
+			uint32_t __iomem *signature = (uint32_t __iomem*)(&reg->message_rwbuffer[0]);
+			char __iomem *devicemap = (char __iomem*)(&reg->message_rwbuffer[21]);
+			int target, lun;
+			struct scsi_device *psdev;
+			char diff;
+
+			atomic_inc(&acb->rq_map_token);
+			if (readl(signature) == ARCMSR_SIGNATURE_GET_CONFIG) {
+				for(target = 0; target < ARCMSR_MAX_TARGETID -1; target++) {
+					diff = (*acb_dev_map)^readb(devicemap);
+					if (diff != 0) {
+						char temp;
+						*acb_dev_map = readb(devicemap);
+						temp =*acb_dev_map;
+						for(lun = 0; lun < ARCMSR_MAX_TARGETLUN; lun++) {
+							if((temp & 0x01)==1 && (diff & 0x01) == 1) {	
+								scsi_add_device(acb->host, 0, target, lun);
+							}else if((temp & 0x01) == 0 && (diff & 0x01) == 1) {
+								psdev = scsi_device_lookup(acb->host, 0, target, lun);
+								if (psdev != NULL ) {
+									scsi_remove_device(psdev);
+									scsi_device_put(psdev);
+								}
+							}
+							temp >>= 1;
+							diff >>= 1;
+						}
+					}
+					devicemap++;
+					acb_dev_map++;
+				}
+			}
+		}
+		break;