linux-imx

/*

 * Driver for Western Digital WD7193, WD7197 and WD7296 SCSI cards

 * Copyright 2013 Ondrej Zary

 *

 * Original driver by

 * Aaron Dewell <dewell@woods.net>

 * Gaerti <Juergen.Gaertner@mbox.si.uni-hannover.de>

 *

 * HW documentation available in book:

 *

 * SPIDER Command Protocol

 * by Chandru M. Sippy

 * SCSI Storage Products (MCP)

 * Western Digital Corporation

 * 09-15-95

 *

 * http://web.archive.org/web/20070717175254/http://sun1.rrzn.uni-hannover.de/gaertner.juergen/wd719x/Linux/Docu/Spider/

 */

​

/*

 * Driver workflow:

 * 1. SCSI command is transformed to SCB (Spider Control Block) by the

 *    queuecommand function.

 * 2. The address of the SCB is stored in a list to be able to access it, if

 *    something goes wrong.

 * 3. The address of the SCB is written to the Controller, which loads the SCB

 *    via BM-DMA and processes it.

 * 4. After it has finished, it generates an interrupt, and sets registers.

 *

 * flaws:

 *  - abort/reset functions

 *

 * ToDo:

 *  - tagged queueing

 */

​

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/delay.h>

#include <linux/pci.h>

#include <linux/firmware.h>

#include <linux/eeprom_93cx6.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_host.h>

#include "wd719x.h"

​

/* low-level register access */

static inline u8 wd719x_readb(struct wd719x *wd, u8 reg)

{

    return ioread8(wd->base + reg);

}

​

static inline u32 wd719x_readl(struct wd719x *wd, u8 reg)

{

    return ioread32(wd->base + reg);

}

​

static inline void wd719x_writeb(struct wd719x *wd, u8 reg, u8 val)

{

    iowrite8(val, wd->base + reg);

}

​