linux-imx

/* sun_esp.c: ESP front-end for Sparc SBUS systems.

 *

 * Copyright (C) 2007, 2008 David S. Miller (davem@davemloft.net)

 */

​

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/mm.h>

#include <linux/init.h>

#include <linux/dma-mapping.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/gfp.h>

​

#include <asm/irq.h>

#include <asm/io.h>

#include <asm/dma.h>

​

#include <scsi/scsi_host.h>

​

#include "esp_scsi.h"

​

#define DRV_MODULE_NAME     "sun_esp"

#define PFX DRV_MODULE_NAME ": "

#define DRV_VERSION     "1.100"

#define DRV_MODULE_RELDATE  "August 27, 2008"

​

#define dma_read32(REG) \

    sbus_readl(esp->dma_regs + (REG))

#define dma_write32(VAL, REG) \

    sbus_writel((VAL), esp->dma_regs + (REG))

​

/* DVMA chip revisions */

enum dvma_rev {

    dvmarev0,

    dvmaesc1,

    dvmarev1,

    dvmarev2,

    dvmarev3,

    dvmarevplus,

    dvmahme

};

​

static int esp_sbus_setup_dma(struct esp *esp, struct platform_device *dma_of)

{

    esp->dma = dma_of;

​

    esp->dma_regs = of_ioremap(&dma_of->resource[0], 0,

                   resource_size(&dma_of->resource[0]),

                   "espdma");

    if (!esp->dma_regs)

        return -ENOMEM;

​

    switch (dma_read32(DMA_CSR) & DMA_DEVICE_ID) {

    case DMA_VERS0:

        esp->dmarev = dvmarev0;

        break;

    case DMA_ESCV1:

        esp->dmarev = dvmaesc1;

        break;

    case DMA_VERS1: