ini9100u.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 728 行 · 第 1/2 页

/**************************************************************************
 * Initio 9100 device driver for Linux.
 *
 * Copyright (c) 1994-1998 Initio Corporation
 * Copyright (c) 1998 Bas Vermeulen <[e-mail]>
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * --------------------------------------------------------------------------
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification, immediately at the beginning of the file.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Where this Software is combined with software released under the terms of 
 * the GNU General Public License ("GPL") and the terms of the GPL would require the 
 * combined work to also be released under the terms of the GPL, the terms
 * and conditions of this License will apply in addition to those of the
 * GPL with the exception of any terms or conditions of this License that
 * conflict with, or are expressly prohibited by, the GPL.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *************************************************************************
 *
 * DESCRIPTION:
 *
 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
 * adapters
 *
 * 08/06/97 hc	- v1.01h
 *		- Support inic-940 and inic-935
 * 09/26/97 hc	- v1.01i
 *		- Make correction from J.W. Schultz suggestion
 * 10/13/97 hc	- Support reset function
 * 10/21/97 hc	- v1.01j
 *		- Support 32 LUN (SCSI 3)
 * 01/14/98 hc	- v1.01k
 *		- Fix memory allocation problem
 * 03/04/98 hc	- v1.01l
 *		- Fix tape rewind which will hang the system problem
 *		- Set can_queue to tul_num_scb
 * 06/25/98 hc	- v1.01m
 *		- Get it work for kernel version >= 2.1.75
 *		- Dynamic assign SCSI bus reset holding time in init_tulip()
 * 07/02/98 hc	- v1.01n
 *		- Support 0002134A
 * 08/07/98 hc  - v1.01o
 *		- Change the tul_abort_srb routine to use scsi_done. <01>
 * 09/07/98 hl  - v1.02
 *              - Change the INI9100U define and proc_dir_entry to
 *                reflect the newer Kernel 2.1.118, but the v1.o1o
 *                should work with Kernel 2.1.118.
 * 09/20/98 wh  - v1.02a
 *              - Support Abort command.
 *              - Handle reset routine.
 * 09/21/98 hl  - v1.03
 *              - remove comments.
 * 12/09/98 bv	- v1.03a
 *		- Removed unused code
 * 12/13/98 bv	- v1.03b
 *		- Remove cli() locking for kernels >= 2.1.95. This uses
 *		  spinlocks to serialize access to the pSRB_head and
 *		  pSRB_tail members of the HCS structure.
 * 09/01/99 bv	- v1.03d
 *		- Fixed a deadlock problem in SMP.
 * 21/01/99 bv	- v1.03e
 *		- Add support for the Domex 3192U PCI SCSI
 *		  This is a slightly modified patch by
 *		  Brian Macy <[e-mail]>
 * 22/02/99 bv	- v1.03f
 *		- Didn't detect the INIC-950 in 2.0.x correctly.
 *		  Now fixed.
 * 05/07/99 bv	- v1.03g
 *		- Changed the assumption that HZ = 100
 * 10/17/03 mc	- v1.04
 *		- added new DMA API support
 * 06/01/04 jmd	- v1.04a
 *		- Re-add reset_bus support
 **************************************************************************/

#define CVT_LINUX_VERSION(V,P,S)        (V * 65536 + P * 256 + S)

#ifndef LINUX_VERSION_CODE
#include <linux/version.h>
#endif

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <asm/io.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "ini9100u.h"

#ifdef DEBUG_i91u
unsigned int i91u_debug = DEBUG_DEFAULT;
#endif

static Scsi_Host_Template driver_template = {
	.proc_name	= "INI9100U",
	.name		= i91u_REVID,
	.detect		= i91u_detect,
	.release	= i91u_release,
	.queuecommand	= i91u_queue,
//	.abort		= i91u_abort,
//	.reset		= i91u_reset,
	.eh_bus_reset_handler = i91u_bus_reset,
	.bios_param	= i91u_biosparam,
	.can_queue	= 1,
	.this_id	= 1,
	.sg_tablesize	= SG_ALL,
	.cmd_per_lun 	= 1,
	.use_clustering	= ENABLE_CLUSTERING,
};
#include "scsi_module.c"

char *i91uCopyright = "Copyright (C) 1996-98";
char *i91uInitioName = "by Initio Corporation";
char *i91uProductName = "INI-9X00U/UW";
char *i91uVersion = "v1.04a";

#define TULSZ(sz)     (sizeof(sz) / sizeof(sz[0]))
#define TUL_RDWORD(x,y)         (short)(inl((int)((ULONG)((ULONG)x+(UCHAR)y)) ))

/* set by i91_setup according to the command line */
static int setup_called = 0;

static int tul_num_ch = 4;	/* Maximum 4 adapters           */
static int tul_num_scb;
static int tul_tag_enable = 1;
static SCB *tul_scb;

#ifdef DEBUG_i91u
static int setup_debug = 0;
#endif

static char *setup_str = (char *) NULL;

static void i91u_panic(char *msg);

static void i91uSCBPost(BYTE * pHcb, BYTE * pScb);

				/* ---- EXTERNAL FUNCTIONS ---- */
					/* Get total number of adapters */
extern void init_i91uAdapter_table(void);
extern int Addi91u_into_Adapter_table(WORD, WORD, BYTE, BYTE, BYTE);
extern int tul_ReturnNumberOfAdapters(void);
extern void get_tulipPCIConfig(HCS * pHCB, int iChannel_index);
extern int init_tulip(HCS * pHCB, SCB * pSCB, int tul_num_scb, BYTE * pbBiosAdr, int reset_time);
extern SCB *tul_alloc_scb(HCS * pHCB);
extern int tul_abort_srb(HCS * pHCB, Scsi_Cmnd * pSRB);
extern void tul_exec_scb(HCS * pHCB, SCB * pSCB);
extern void tul_release_scb(HCS * pHCB, SCB * pSCB);
extern void tul_stop_bm(HCS * pHCB);
extern int tul_reset_scsi(HCS * pCurHcb, int seconds);
extern int tul_isr(HCS * pHCB);
extern int tul_reset(HCS * pHCB, Scsi_Cmnd * pSRB, unsigned char target);
extern int tul_reset_scsi_bus(HCS * pCurHcb);
extern int tul_device_reset(HCS * pCurHcb, ULONG pSrb, unsigned int target, unsigned int ResetFlags);
				/* ---- EXTERNAL VARIABLES ---- */
extern HCS tul_hcs[];

const PCI_ID i91u_pci_devices[] = {
	{ INI_VENDOR_ID, I950_DEVICE_ID },
	{ INI_VENDOR_ID, I940_DEVICE_ID },
	{ INI_VENDOR_ID, I935_DEVICE_ID },
	{ INI_VENDOR_ID, I920_DEVICE_ID },
	{ DMX_VENDOR_ID, I920_DEVICE_ID },
};

/*
 *  queue services:
 */
/*****************************************************************************
 Function name  : i91uAppendSRBToQueue
 Description    : This function will push current request into save list
 Input          : pSRB  -       Pointer to SCSI request block.
		  pHCB  -       Pointer to host adapter structure
 Output         : None.
 Return         : None.
*****************************************************************************/
static void i91uAppendSRBToQueue(HCS * pHCB, Scsi_Cmnd * pSRB)
{
	ULONG flags;
	spin_lock_irqsave(&(pHCB->pSRB_lock), flags);

	pSRB->host_scribble = NULL;	/* Pointer to next */

	if (pHCB->pSRB_head == NULL)
		pHCB->pSRB_head = pSRB;
	else
		pHCB->pSRB_tail->host_scribble = (char *)pSRB;	/* Pointer to next */
	pHCB->pSRB_tail = pSRB;

	spin_unlock_irqrestore(&(pHCB->pSRB_lock), flags);
	return;
}

/*****************************************************************************
 Function name  : i91uPopSRBFromQueue
 Description    : This function will pop current request from save list
 Input          : pHCB  -       Pointer to host adapter structure
 Output         : None.
 Return         : pSRB  -       Pointer to SCSI request block.
*****************************************************************************/
static Scsi_Cmnd *i91uPopSRBFromQueue(HCS * pHCB)
{
	Scsi_Cmnd *pSRB;
	ULONG flags;

	spin_lock_irqsave(&(pHCB->pSRB_lock), flags);

	if ((pSRB = pHCB->pSRB_head) != NULL) {
		pHCB->pSRB_head = (struct scsi_cmnd *)pHCB->pSRB_head->host_scribble;
		pSRB->host_scribble = NULL;
	}
	spin_unlock_irqrestore(&(pHCB->pSRB_lock), flags);

	return (pSRB);
}

static irqreturn_t i91u_intr(int irqno, void *dev_id, struct pt_regs *regs)
{
	struct Scsi_Host *dev = dev_id;
	unsigned long flags;
	
	spin_lock_irqsave(dev->host_lock, flags);
	tul_isr((HCS *)dev->base);
	spin_unlock_irqrestore(dev->host_lock, flags);
	return IRQ_HANDLED;
}

/* called from init/main.c */

void i91u_setup(char *str, int *ints)
{
	if (setup_called)
		i91u_panic("i91u: i91u_setup called twice.\n");

	setup_called = ints[0];
	setup_str = str;

#ifdef DEBUG_i91u
	setup_debug = ints[0] >= 1 ? ints[1] : DEBUG_DEFAULT;
#endif
}

int tul_NewReturnNumberOfAdapters(void)
{
	struct pci_dev *pDev = NULL;	/* Start from none              */
	int iAdapters = 0;
	long dRegValue;
	WORD wBIOS;
	int i = 0;

	init_i91uAdapter_table();

	for (i = 0; i < TULSZ(i91u_pci_devices); i++)
	{
		while ((pDev = pci_find_device(i91u_pci_devices[i].vendor_id, i91u_pci_devices[i].device_id, pDev)) != NULL) {
			if (pci_enable_device(pDev))
				continue;
			pci_read_config_dword(pDev, 0x44, (u32 *) & dRegValue);
			wBIOS = (UWORD) (dRegValue & 0xFF);
			if (((dRegValue & 0xFF00) >> 8) == 0xFF)
				dRegValue = 0;
			wBIOS = (wBIOS << 8) + ((UWORD) ((dRegValue & 0xFF00) >> 8));
			if (pci_set_dma_mask(pDev, 0xffffffff)) {
				printk(KERN_WARNING 
				       "i91u: Could not set 32 bit DMA mask\n");
				continue;
			}

			if (Addi91u_into_Adapter_table(wBIOS,
							(pDev->resource[0].start),
						       	pDev->irq,
						       	pDev->bus->number,
					       		(pDev->devfn >> 3)
		    		) == 0)
				iAdapters++;
		}
	}

	return (iAdapters);
}

int i91u_detect(Scsi_Host_Template * tpnt)
{
	HCS *pHCB;
	struct Scsi_Host *hreg;
	unsigned long i;	/* 01/14/98                     */
	int ok = 0, iAdapters;
	ULONG dBiosAdr;
	BYTE *pbBiosAdr;

	tpnt->proc_name = "INI9100U";

	if (setup_called) {	/* Setup by i91u_setup          */
		printk("i91u: processing commandline: ");

#ifdef DEBUG_i91u
		if (setup_called > 1) {
			printk("\ni91u: %s\n", setup_str);
			printk("i91u: usage: i91u[=<DEBUG>]\n");
			i91u_panic("i91u panics in line %d", __LINE__);
		}
		i91u_debug = setup_debug;
#endif
	}
	/* Get total number of adapters in the motherboard */
	iAdapters = tul_NewReturnNumberOfAdapters();
	if (iAdapters == 0)	/* If no tulip founded, return */
		return (0);

	tul_num_ch = (iAdapters > tul_num_ch) ? tul_num_ch : iAdapters;
	/* Update actually channel number */
	if (tul_tag_enable) {	/* 1.01i                  */