Commit 48a31030 authored by Ondrej Zary's avatar Ondrej Zary Committed by Christoph Hellwig
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wd719x: Introduce Western Digital WD7193/7197/7296 PCI SCSI card driver 



Introduce wd719x, a driver for Western Digital WD7193, WD7197 and WD7296 PCI
SCSI controllers based on WD33C296A chip.
Tested with WD7193 card.

Signed-off-by: default avatarOndrej Zary <linux@rainbow-software.org>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 7ff28aee

drivers/scsi/Kconfig

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@@ -1453,6 +1453,14 @@ config SCSI_NSP32 
	  To compile this driver as a module, choose M here: the

	  module will be called nsp32.



config SCSI_WD719X

	tristate "Western Digital WD7193/7197/7296 support"

	depends on PCI && SCSI

	select EEPROM_93CX6

	---help---

	  This is a driver for Western Digital WD7193, WD7197 and WD7296 PCI

	  SCSI controllers (based on WD33C296A chip).



config SCSI_DEBUG

	tristate "SCSI debugging host simulator"

	depends on SCSI

drivers/scsi/Makefile

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@@ -143,6 +143,7 @@ obj-$(CONFIG_SCSI_VIRTIO) += virtio_scsi.o 
obj-$(CONFIG_VMWARE_PVSCSI)	+= vmw_pvscsi.o

obj-$(CONFIG_XEN_SCSI_FRONTEND)	+= xen-scsifront.o

obj-$(CONFIG_HYPERV_STORAGE)	+= hv_storvsc.o

obj-$(CONFIG_SCSI_WD719X)	+= wd719x.o



obj-$(CONFIG_ARM)		+= arm/

drivers/scsi/wd719x.c

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File added.

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drivers/scsi/wd719x.h

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#ifndef _WD719X_H_

#define _WD719X_H_



#define WD719X_SG 255		/* Scatter/gather size */

#define WD719X_CMD_PER_LUN 1	/* We should be able to do linked commands, but

				 * this is 1 for now to be safe. */



struct wd719x_sglist {

	__le32 ptr;

	__le32 length;

} __packed;



enum wd719x_card_type {

	WD719X_TYPE_UNKNOWN = 0,

	WD719X_TYPE_7193,

	WD719X_TYPE_7197,

	WD719X_TYPE_7296,

};



union wd719x_regs {

	__le32 all;	/* All Status at once */

	struct {

		u8 OPC;		/* Opcode register */

		u8 SCSI;	/* SCSI Errors */

		u8 SUE;		/* Spider unique Errors */

		u8 INT;		/* Interrupt Status */

	} bytes;

};



/* Spider Command Block (SCB) */

struct wd719x_scb {

	__le32 Int_SCB;	/* 00-03 Internal SCB link pointer (must be cleared) */

	u8 SCB_opcode;	/* 04 SCB Command opcode */

	u8 CDB_tag;	/* 05 SCSI Tag byte for CDB queues (0 if untagged) */

	u8 lun;		/* 06 SCSI LUN */

	u8 devid;	/* 07 SCSI Device ID */

	u8 CDB[16];	/* 08-23 SCSI CDB (16 bytes as defined by ANSI spec. */

	__le32 data_p;	/* 24-27 Data transfer address (or SG list address) */

	__le32 data_length; /* 28-31 Data transfer Length (or SG list length) */

	__le32 CDB_link;    /* 32-35 SCSI CDB Link Ptr */

	__le32 sense_buf;   /* 36-39 Auto request sense buffer address */

	u8 sense_buf_length;/* 40 Auto request sense transfer length */

	u8 reserved;	/* 41 reserved */

	u8 SCB_options;	/* 42 SCB-options */

	u8 SCB_tag_msg;	/* 43 Tagged messages options */

	/* Not filled in by host */

	__le32 req_ptr;	/* 44-47 Ptr to Host Request returned on interrupt */

	u8 host_opcode;	/* 48 Host Command Opcode (same as AMR_00) */

	u8 scsi_stat;	/* 49 SCSI Status returned */

	u8 ret_error;	/* 50 SPIDER Unique Error Code returned (SUE) */

	u8 int_stat;	/* 51 Message u8 / Interrupt Status byte returned */

	__le32 transferred; /* 52-55 Bytes Transferred */

	u8 last_trans[3];  /* 56-58 Bytes Transferred in last session */

	u8 length;	/* 59 SCSI Messages Length (1-8) */

	u8 sync_offset;	/* 60 Synchronous offset */

	u8 sync_rate;	/* 61 Synchronous rate */

	u8 flags[2];	/* 62-63 SCB specific flags (local to each thread) */

	/* everything below is for driver use (not used by card) */

	dma_addr_t phys;	/* bus address of the SCB */

	struct scsi_cmnd *cmd;	/* a copy of the pointer we were passed */

	struct list_head list;

	struct wd719x_sglist sg_list[WD719X_SG] __aligned(8); /* SG list */

} __packed;



struct wd719x {

	struct Scsi_Host *sh;	/* pointer to host structure */

	struct pci_dev *pdev;

	void __iomem *base;

	enum wd719x_card_type type; /* type of card */

	void *fw_virt;		/* firmware buffer CPU address */

	dma_addr_t fw_phys;	/* firmware buffer bus address */

	size_t fw_size;		/* firmware buffer size */

	struct wd719x_host_param *params; /* host parameters (EEPROM) */

	dma_addr_t params_phys; /* host parameters bus address */

	void *hash_virt;	/* hash table CPU address */

	dma_addr_t hash_phys;	/* hash table bus address */

	struct list_head active_scbs;

	struct list_head free_scbs;

};



/* timeout delays in microsecs */

#define WD719X_WAIT_FOR_CMD_READY	500

#define WD719X_WAIT_FOR_RISC		2000

#define WD719X_WAIT_FOR_SCSI_RESET	3000000



/* All commands except 0x00 generate an interrupt */

#define WD719X_CMD_READY	0x00 /* Command register ready (or noop) */

#define WD719X_CMD_INIT_RISC	0x01 /* Initialize RISC */

/* 0x02 is reserved */

#define WD719X_CMD_BUSRESET	0x03 /* Assert SCSI bus reset */

#define WD719X_CMD_READ_FIRMVER	0x04 /* Read the Firmware Revision */

#define WD719X_CMD_ECHO_BYTES	0x05 /* Echo command bytes (DW) */

/* 0x06 is reserved */

/* 0x07 is reserved */

#define WD719X_CMD_GET_PARAM	0x08 /* Get programmable parameters */

#define WD719X_CMD_SET_PARAM	0x09 /* Set programmable parameters */

#define WD719X_CMD_SLEEP	0x0a /* Put SPIDER to sleep */

#define WD719X_CMD_READ_INIT	0x0b /* Read initialization parameters */

#define WD719X_CMD_RESTORE_INIT	0x0c /* Restore initialization parameters */

/* 0x0d is reserved */

/* 0x0e is reserved */

/* 0x0f is reserved */

#define WD719X_CMD_ABORT_TAG	0x10 /* Send Abort tag message to target */

#define WD719X_CMD_ABORT	0x11 /* Send Abort message to target */

#define WD719X_CMD_RESET	0x12 /* Send Reset message to target */

#define WD719X_CMD_INIT_SCAM	0x13 /* Initiate SCAM */

#define WD719X_CMD_GET_SYNC	0x14 /* Get synchronous rates */

#define WD719X_CMD_SET_SYNC	0x15 /* Set synchronous rates */

#define WD719X_CMD_GET_WIDTH	0x16 /* Get SCSI bus width */

#define WD719X_CMD_SET_WIDTH	0x17 /* Set SCSI bus width */

#define WD719X_CMD_GET_TAGS	0x18 /* Get tag flags */

#define WD719X_CMD_SET_TAGS	0x19 /* Set tag flags */

#define WD719X_CMD_GET_PARAM2	0x1a /* Get programmable params (format 2) */

#define WD719X_CMD_SET_PARAM2	0x1b /* Set programmable params (format 2) */

/* Commands with request pointers (mailbox) */

#define WD719X_CMD_PROCESS_SCB	0x80 /* Process SCSI Control Block (SCB) */

/* No interrupt generated on acceptance of SCB pointer */



/* interrupt status defines */

#define WD719X_INT_NONE		0x00 /* No interrupt pending */

#define WD719X_INT_NOERRORS	0x01 /* Command completed with no errors */

#define WD719X_INT_LINKNOERRORS	0x02 /* link cmd completed with no errors */

#define WD719X_INT_LINKNOSTATUS	0x03 /* link cmd completed with no flag set */

#define WD719X_INT_ERRORSLOGGED	0x04 /* cmd completed with errors logged */

#define WD719X_INT_SPIDERFAILED	0x05 /* cmd failed without valid SCSI status */

#define WD719X_INT_BADINT	0x80 /* unsolicited interrupt */

#define WD719X_INT_PIOREADY	0xf0 /* data ready for PIO output */



/* Spider Unique Error Codes (SUE) */

#define WD719X_SUE_NOERRORS	0x00 /* No errors detected by SPIDER */

#define WD719X_SUE_REJECTED	0x01 /* Command Rejected (bad opcode/param) */

#define WD719X_SUE_SCBQFULL	0x02 /* SCB queue full */

/* 0x03 is reserved */

#define WD719X_SUE_TERM		0x04 /* Host terminated SCB via primative cmd */

#define WD719X_SUE_CHAN1PAR	0x05 /* PCI Channel 1 parity error occurred */

#define WD719X_SUE_CHAN1ABORT	0x06 /* PCI Channel 1 system abort occurred */

#define WD719X_SUE_CHAN23PAR	0x07 /* PCI Channel 2/3 parity error occurred */

#define WD719X_SUE_CHAN23ABORT	0x08 /* PCI Channel 2/3 system abort occurred */

#define WD719X_SUE_TIMEOUT	0x10 /* Selection/reselection timeout */

#define WD719X_SUE_RESET	0x11 /* SCSI bus reset occurred */

#define WD719X_SUE_BUSERROR	0x12 /* SCSI bus error */

#define WD719X_SUE_WRONGWAY	0x13 /* Wrong data transfer dir set by target */

#define WD719X_SUE_BADPHASE	0x14 /* SCSI phase illegal or unexpected */

#define WD719X_SUE_TOOLONG	0x15 /* target requested too much data */

#define WD719X_SUE_BUSFREE	0x16 /* Unexpected SCSI bus free */

#define WD719X_SUE_ARSDONE	0x17 /* Auto request sense executed */

#define WD719X_SUE_IGNORED	0x18 /* SCSI message was ignored by target */

#define WD719X_SUE_WRONGTAGS	0x19 /* Tagged SCB & tags off (or vice versa) */

#define WD719X_SUE_BADTAGS	0x1a /* Wrong tag message type for target */

#define WD719X_SUE_NOSCAMID	0x1b /* No SCAM soft ID available */



/* code sizes */

#define	WD719X_HASH_TABLE_SIZE	4096



/* Advanced Mode Registers */

/* Regs 0x00..0x1f are for Advanced Mode of the card (RISC is running). */

#define WD719X_AMR_COMMAND		0x00

#define WD719X_AMR_CMD_PARAM		0x01

#define WD719X_AMR_CMD_PARAM_2		0x02

#define WD719X_AMR_CMD_PARAM_3		0x03

#define WD719X_AMR_SCB_IN		0x04



#define WD719X_AMR_BIOS_SHARE_INT	0x0f



#define WD719X_AMR_SCB_OUT		0x18

#define WD719X_AMR_OP_CODE		0x1c

#define WD719X_AMR_SCSI_STATUS		0x1d

#define WD719X_AMR_SCB_ERROR		0x1e

#define WD719X_AMR_INT_STATUS		0x1f



#define WD719X_DISABLE_INT	0x80



/* SCB flags */

#define WD719X_SCB_FLAGS_CHECK_DIRECTION	0x01

#define WD719X_SCB_FLAGS_PCI_TO_SCSI		0x02

#define WD719X_SCB_FLAGS_AUTO_REQUEST_SENSE	0x10

#define WD719X_SCB_FLAGS_DO_SCATTER_GATHER	0x20

#define WD719X_SCB_FLAGS_NO_DISCONNECT		0x40



/* PCI Registers used for reset, initial code download */

/* Regs 0x20..0x3f are for Normal (DOS) mode (RISC is asleep). */

#define WD719X_PCI_GPIO_CONTROL		0x3C

#define WD719X_PCI_GPIO_DATA		0x3D

#define WD719X_PCI_PORT_RESET		0x3E

#define WD719X_PCI_MODE_SELECT		0x3F



#define WD719X_PCI_EXTERNAL_ADDR	0x60

#define WD719X_PCI_INTERNAL_ADDR	0x64

#define WD719X_PCI_DMA_TRANSFER_SIZE	0x66

#define WD719X_PCI_CHANNEL2_3CMD	0x68

#define WD719X_PCI_CHANNEL2_3STATUS	0x69



#define WD719X_GPIO_ID_BITS		0x0a

#define WD719X_PRAM_BASE_ADDR		0x00



/* codes written to or read from the card */

#define WD719X_PCI_RESET		 0x01

#define WD719X_ENABLE_ADVANCE_MODE	 0x01



#define WD719X_START_CHANNEL2_3DMA	 0x17

#define WD719X_START_CHANNEL2_3DONE	 0x01

#define WD719X_START_CHANNEL2_3ABORT	 0x20



/* 33C296 GPIO bits for EEPROM pins */

#define WD719X_EE_DI	(1 << 1)

#define WD719X_EE_CS	(1 << 2)

#define WD719X_EE_CLK	(1 << 3)

#define WD719X_EE_DO	(1 << 4)



/* EEPROM contents */

struct wd719x_eeprom_header {

	u8 sig1;

	u8 sig2;

	u8 version;

	u8 checksum;

	u8 cfg_offset;

	u8 cfg_size;

	u8 setup_offset;

	u8 setup_size;

} __packed;



#define WD719X_EE_SIG1		0

#define WD719X_EE_SIG2		1

#define WD719X_EE_VERSION	2

#define WD719X_EE_CHECKSUM	3

#define WD719X_EE_CFG_OFFSET	4

#define WD719X_EE_CFG_SIZE	5

#define WD719X_EE_SETUP_OFFSET	6

#define WD719X_EE_SETUP_SIZE	7



#define WD719X_EE_SCSI_ID_MASK	0xf



/* SPIDER Host Parameters Block (=EEPROM configuration block) */

struct wd719x_host_param {

	u8 ch_1_th;	/* FIFO threshold */

	u8 scsi_conf;	/* SCSI configuration */

	u8 own_scsi_id;	/* controller SCSI ID */

	u8 sel_timeout;	/* selection timeout*/

	u8 sleep_timer;	/* seep timer */

	__le16 cdb_size;/* CDB size groups */

	__le16 tag_en;	/* Tag msg enables (ID 0-15) */

	u8 scsi_pad;	/* SCSI pad control */

	__le32 wide;	/* WIDE msg options (ID 0-15) */

	__le32 sync;	/* SYNC msg options (ID 0-15) */

	u8 soft_mask;	/* soft error mask */

	u8 unsol_mask;	/* unsolicited error mask */

} __packed;



#endif /* _WD719X_H_ */

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