cregit-Linux how code gets into the kernel

Release 4.7 drivers/scsi/arm/oak.c

Directory: drivers/scsi/arm
/*
 * Oak Generic NCR5380 driver
 *
 * Copyright 1995-2002, Russell King
 */

#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/init.h>

#include <asm/ecard.h>
#include <asm/io.h>

#include <scsi/scsi_host.h>


#define priv(host)			((struct NCR5380_hostdata *)(host)->hostdata)


#define NCR5380_read(reg) \
	readb(priv(instance)->base + ((reg) << 2))

#define NCR5380_write(reg, value) \
	writeb(value, priv(instance)->base + ((reg) << 2))


#define NCR5380_dma_xfer_len(instance, cmd, phase)	(0)

#define NCR5380_dma_recv_setup		oakscsi_pread

#define NCR5380_dma_send_setup		oakscsi_pwrite

#define NCR5380_dma_residual(instance)	(0)


#define NCR5380_queue_command		oakscsi_queue_command

#define NCR5380_info			oakscsi_info


#define NCR5380_implementation_fields	\
	void __iomem *base

#include "../NCR5380.h"


#undef START_DMA_INITIATOR_RECEIVE_REG

#define START_DMA_INITIATOR_RECEIVE_REG	(128 + 7)


#define STAT	((128 + 16) << 2)

#define DATA	((128 + 8) << 2)




static inline int oakscsi_pwrite(struct Scsi_Host *instance,
                                 unsigned char *addr, int len)
{
  void __iomem *base = priv(instance)->base;

printk("writing %p len %d\n",addr, len);

  while(1)
  {
    int status;
    while (((status = readw(base + STAT)) & 0x100)==0);
  }
  return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
pre-gitpre-git5778.08%125.00%


russell kingrussell king1216.44%125.00%


finn thainfinn thain45.48%250.00%


Total73100.00%4100.00%






static inline int oakscsi_pread(struct Scsi_Host *instance,
                                unsigned char *addr, int len)
{
  void __iomem *base = priv(instance)->base;
printk("reading %p len %d\n", addr, len);
  while(len > 0)
  {
    unsigned int status, timeout;
    unsigned long b;
    
    timeout = 0x01FFFFFF;
    
    while (((status = readw(base + STAT)) & 0x100)==0)
    {
      timeout--;
      if(status & 0x200 || !timeout)
      {
        printk("status = %08X\n", status);
        return -1;
      }
    }

    if(len >= 128)
    {
      readsw(base + DATA, addr, 128);
      addr += 128;
      len -= 128;
    }
    else
    {
      b = (unsigned long) readw(base + DATA);
      *addr ++ = b;
      len -= 1;
      if(len)
        *addr ++ = b>>8;
      len -= 1;
    }
  }
  return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
pre-gitpre-git16088.40%125.00%


russell kingrussell king1910.50%125.00%


finn thainfinn thain21.10%250.00%


Total181100.00%4100.00%




#undef STAT

#undef DATA

#include "../NCR5380.c"


static struct scsi_host_template oakscsi_template = {
	.module			= THIS_MODULE,
	.name			= "Oak 16-bit SCSI",
	.info			= oakscsi_info,
	.queuecommand		= oakscsi_queue_command,
	.eh_abort_handler	= NCR5380_abort,
	.eh_bus_reset_handler	= NCR5380_bus_reset,
	.can_queue		= 16,
	.this_id		= 7,
	.sg_tablesize		= SG_ALL,
	.cmd_per_lun		= 2,
	.use_clustering		= DISABLE_CLUSTERING,
	.proc_name		= "oakscsi",
	.cmd_size		= NCR5380_CMD_SIZE,
	.max_sectors		= 128,
};




static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	int ret = -ENOMEM;

	ret = ecard_request_resources(ec);
	if (ret)
		goto out;

	host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
	if (!host) {
		ret = -ENOMEM;
		goto release;
	}

	priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
				   ecard_resource_len(ec, ECARD_RES_MEMC));
	if (!priv(host)->base) {
		ret = -ENOMEM;
		goto unreg;
	}

	host->irq = NO_IRQ;
	host->n_io_port = 255;

	ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
	if (ret)
		goto out_unmap;

	NCR5380_maybe_reset_bus(host);

	ret = scsi_add_host(host, &ec->dev);
	if (ret)
		goto out_exit;

	scsi_scan_host(host);
	goto out;

 out_exit:
	NCR5380_exit(host);
 out_unmap:
	iounmap(priv(host)->base);
 unreg:
	scsi_host_put(host);
 release:
	ecard_release_resources(ec);
 out:
	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
russell kingrussell king16275.35%325.00%


finn thainfinn thain2612.09%541.67%


linus torvaldslinus torvalds125.58%18.33%


christoph hellwigchristoph hellwig104.65%216.67%


mike andersonmike anderson52.33%18.33%


Total215100.00%12100.00%






static void oakscsi_remove(struct expansion_card *ec)
{
	struct Scsi_Host *host = ecard_get_drvdata(ec);

	ecard_set_drvdata(ec, NULL);
	scsi_remove_host(host);

	NCR5380_exit(host);
	iounmap(priv(host)->base);
	scsi_host_put(host);
	ecard_release_resources(ec);
}


Contributors
PersonTokensPropCommitsCommitProp
russell kingrussell king4984.48%240.00%


james bottomleyjames bottomley58.62%120.00%


linus torvaldslinus torvalds35.17%120.00%


christoph hellwigchristoph hellwig11.72%120.00%


Total58100.00%5100.00%




static const struct ecard_id oakscsi_cids[] = {
	{ MANU_OAK, PROD_OAK_SCSI },
	{ 0xffff, 0xffff }
};


static struct ecard_driver oakscsi_driver = {
	.probe		= oakscsi_probe,
	.remove		= oakscsi_remove,
	.id_table	= oakscsi_cids,
	.drv = {
		.name		= "oakscsi",
        },
};




static int __init oakscsi_init(void)
{
	return ecard_register_driver(&oakscsi_driver);
}


Contributors
PersonTokensPropCommitsCommitProp
russell kingrussell king1381.25%150.00%


linus torvaldslinus torvalds318.75%150.00%


Total16100.00%2100.00%






static void __exit oakscsi_exit(void)
{
	ecard_remove_driver(&oakscsi_driver);
}


Contributors
PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds1386.67%150.00%


russell kingrussell king213.33%150.00%


Total15100.00%2100.00%




module_init(oakscsi_init);

module_exit(oakscsi_exit);

MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("Oak SCSI driver");
MODULE_LICENSE("GPL");


Overall Contributors
PersonTokensPropCommitsCommitProp
russell kingrussell king36444.07%620.00%


pre-gitpre-git25430.75%13.33%


linus torvaldslinus torvalds10712.95%310.00%


finn thainfinn thain769.20%1343.33%


christoph hellwigchristoph hellwig131.57%310.00%


james bottomleyjames bottomley50.61%13.33%


mike andersonmike anderson50.61%13.33%


arjan van de venarjan van de ven10.12%13.33%


adrian bunkadrian bunk10.12%13.33%


greg kroah-hartmangreg kroah-hartman0.00%00.00%


Total826100.00%30100.00%

  
Directory: drivers/scsi/arm



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