patch-2.3.21 linux/drivers/net/sdlamain.c

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diff -u --recursive --new-file v2.3.20/linux/drivers/net/sdlamain.c linux/drivers/net/sdlamain.c
@@ -1,627 +0,0 @@
-/*****************************************************************************
-* sdlamain.c	WANPIPE(tm) Multiprotocol WAN Link Driver.  Main module.
-*
-* Author:	Gene Kozin	<genek@compuserve.com>
-*		Jaspreet Singh	<jaspreet@sangoma.com>
-*
-* Copyright:	(c) 1995-1997 Sangoma Technologies Inc.
-*
-*		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 of the License, or (at your option) any later version.
-* ============================================================================
-* May 19, 1999  Arnaldo Melo    __init for wanpipe_init
-* Nov 28, 1997	Jaspreet Singh	Changed DRV_RELEASE to 1
-* Nov 10, 1997	Jaspreet Singh	Changed sti() to restore_flags();
-* Nov 06, 1997 	Jaspreet Singh	Changed DRV_VERSION to 4 and DRV_RELEASE to 0
-* Oct 20, 1997 	Jaspreet Singh	Modified sdla_isr routine so that card->in_isr
-*				assignments are taken out and placed in the
-*				sdla_ppp.c, sdla_fr.c and sdla_x25.c isr
-*				routines. Took out 'wandev->tx_int_enabled' and
-*				replaced it with 'wandev->enable_tx_int'. 
-* May 29, 1997	Jaspreet Singh	Flow Control Problem
-*				added "wandev->tx_int_enabled=1" line in the
-*				init module. This line intializes the flag for 
-*				preventing Interrupt disabled with device set to
-*				busy
-* Jan 15, 1997	Gene Kozin	Version 3.1.0
-*				 o added UDP management stuff
-* Jan 02, 1997	Gene Kozin	Initial version.
-*****************************************************************************/
-
-#include <linux/config.h>	/* OS configuration options */
-#include <linux/stddef.h>	/* offsetof(), etc. */
-#include <linux/errno.h>	/* return codes */
-#include <linux/string.h>	/* inline memset(), etc. */
-#include <linux/malloc.h>	/* kmalloc(), kfree() */
-#include <linux/kernel.h>	/* printk(), and other useful stuff */
-#include <linux/module.h>	/* support for loadable modules */
-#include <linux/ioport.h>	/* request_region(), release_region() */
-#include <linux/tqueue.h>	/* for kernel task queues */
-#include <linux/wanrouter.h>	/* WAN router definitions */
-#include <linux/wanpipe.h>	/* WANPIPE common user API definitions */
-#include <asm/uaccess.h>	/* kernel <-> user copy */
-#include <asm/io.h>		/* phys_to_virt() */
-#include <linux/init.h>         /* __init (when not using as a module) */
-
-
-/****** Defines & Macros ****************************************************/
-
-#ifdef	_DEBUG_
-#define	STATIC
-#else
-#define	STATIC		static
-#endif
-
-#define	DRV_VERSION	4		/* version number */
-#define	DRV_RELEASE	1		/* release (minor version) number */
-#define	MAX_CARDS	8		/* max number of adapters */
-
-#ifndef	CONFIG_WANPIPE_CARDS		/* configurable option */
-#define	CONFIG_WANPIPE_CARDS 1
-#endif
-
-#define	CMD_OK		0		/* normal firmware return code */
-#define	CMD_TIMEOUT	0xFF		/* firmware command timed out */
-#define	MAX_CMD_RETRY	10		/* max number of firmware retries */
-
-/****** Function Prototypes *************************************************/
-
-/* Module entry points */
-int init_module (void);
-void cleanup_module (void);
-
-/* WAN link driver entry points */
-static int setup    (wan_device_t* wandev, wandev_conf_t* conf);
-static int shutdown (wan_device_t* wandev);
-static int ioctl    (wan_device_t* wandev, unsigned cmd, unsigned long arg);
-
-/* IOCTL hanlers */
-static int ioctl_dump	(sdla_t* card, sdla_dump_t* u_dump);
-static int ioctl_exec	(sdla_t* card, sdla_exec_t* u_exec);
-
-/* Miscellaneous functions */
-STATIC void sdla_isr	(int irq, void* dev_id, struct pt_regs *regs);
-STATIC void sdla_poll	(void* data);
-
-/****** Global Data **********************************************************
- * Note: All data must be explicitly initialized!!!
- */
-
-/* private data */
-static char drvname[]	= "wanpipe";
-static char fullname[]	= "WANPIPE(tm) Multiprotocol Driver";
-static char copyright[]	= "(c) 1995-1996 Sangoma Technologies Inc.";
-static int ncards = CONFIG_WANPIPE_CARDS;
-static int active = 0;			/* number of active cards */
-static sdla_t* card_array = NULL;	/* adapter data space */
-
-/* Task queue element for creating a 'thread' */
-static struct tq_struct sdla_tq =
-{
-	NULL,		/* .next */
-	0,		/* .sync */
-	&sdla_poll,	/* .routine */
-	NULL		/* .data */
-}; 
-
-/******* Kernel Loadable Module Entry Points ********************************/
-
-/*============================================================================
- * Module 'insert' entry point.
- * o print announcement
- * o allocate adapter data space
- * o initialize static data
- * o register all cards with WAN router
- * o calibrate SDLA shared memory access delay.
- *
- * Return:	0	Ok
- *		< 0	error.
- * Context:	process
- */
- 
-#ifdef MODULE
-int init_module (void)
-#else
-int __init wanpipe_init(void)
-#endif
-{
-	int cnt, err = 0;
-
-	printk(KERN_INFO "%s v%u.%u %s\n",
-		fullname, DRV_VERSION, DRV_RELEASE, copyright)
-	;
-
-	/* Verify number of cards and allocate adapter data space */
-	ncards = min(ncards, MAX_CARDS);
-	ncards = max(ncards, 1);
-	card_array = kmalloc(sizeof(sdla_t) * ncards, GFP_KERNEL);
-	if (card_array == NULL)
-		return -ENOMEM
-	;
-	memset(card_array, 0, sizeof(sdla_t) * ncards);
-
-	/* Register adapters with WAN router */
-	for (cnt = 0; cnt < ncards; ++cnt)
-	{
-		sdla_t* card = &card_array[cnt];
-		wan_device_t* wandev = &card->wandev;
-
-		sprintf(card->devname, "%s%d", drvname, cnt + 1);
-		wandev->magic    = ROUTER_MAGIC;
-		wandev->name     = card->devname;
-		wandev->private  = card;
-		wandev->enable_tx_int = 0;
-		wandev->setup    = &setup;
-		wandev->shutdown = &shutdown;
-		wandev->ioctl    = &ioctl;
-		err = register_wan_device(wandev);
-		if (err)
-		{
-			printk(KERN_ERR
-				"%s: %s registration failed with error %d!\n",
-				drvname, card->devname, err)
-			;
-			break;
-		}
-	}
-	if (cnt)
-		ncards = cnt;	/* adjust actual number of cards */
-	else
-	{
-		kfree(card_array);
-		err = -ENODEV;
-	}
-	return err;
-}
-
-#ifdef MODULE
-/*============================================================================
- * Module 'remove' entry point.
- * o unregister all adapters from the WAN router
- * o release all remaining system resources
- */
-void cleanup_module (void)
-{
-	int i;
-
-	for (i = 0; i < ncards; ++i)
-	{
-		sdla_t* card = &card_array[i];
-		unregister_wan_device(card->devname);
-	}
-	kfree(card_array);
-}
-
-#endif
-
-/******* WAN Device Driver Entry Points *************************************/
-
-/*============================================================================
- * Setup/confugure WAN link driver.
- * o check adapter state
- * o make sure firmware is present in configuration
- * o make sure I/O port and IRQ are specified
- * o make sure I/O region is available
- * o allocate interrupt vector
- * o setup SDLA hardware
- * o call appropriate routine to perform protocol-specific initialization
- * o mark I/O region as used
- * o if this is the first active card, then schedule background task
- *
- * This function is called when router handles ROUTER_SETUP IOCTL. The
- * configuration structure is in kernel memory (including extended data, if
- * any).
- */
- 
-static int setup (wan_device_t* wandev, wandev_conf_t* conf)
-{
-	sdla_t* card;
-	int err = 0;
-	int irq;
-
-	/* Sanity checks */
-	if ((wandev == NULL) || (wandev->private == NULL) || (conf == NULL))
-		return -EFAULT;
-		
-	card = wandev->private;
-	if (wandev->state != WAN_UNCONFIGURED)
-		return -EBUSY;		/* already configured */
-
-	if (!conf->data_size || (conf->data == NULL))
-	{
-		printk(KERN_ERR
-			"%s: firmware not found in configuration data!\n",
-			wandev->name);
-		return -EINVAL;
-	}
-	if (conf->ioport <= 0)
-	{
-		printk(KERN_ERR
-			"%s: can't configure without I/O port address!\n",
-			wandev->name);
-		return -EINVAL;
-	}
-	
-	if (conf->irq <= 0)
-	{
-		printk(KERN_ERR "%s: can't configure without IRQ!\n",
-			wandev->name);
-		return -EINVAL;
-	}
-
-	/* Make sure I/O port region is available */
-	if (check_region(conf->ioport, SDLA_MAXIORANGE))
-	{
-		printk(KERN_ERR "%s: I/O region 0x%X - 0x%X is in use!\n",
-			wandev->name, conf->ioport,
-			conf->ioport + SDLA_MAXIORANGE);
-		return -EINVAL;
-	}
-
-	/* Allocate IRQ */
-	irq = (conf->irq == 2) ? 9 : conf->irq;	/* IRQ2 -> IRQ9 */
-	if (request_irq(irq, sdla_isr, 0, wandev->name, card))
-	{
-		printk(KERN_ERR "%s: can't reserve IRQ %d!\n",
-			wandev->name, irq);
-		return -EINVAL;
-	}
-
-	/* Configure hardware, load firmware, etc. */
-	memset(&card->hw, 0, sizeof(sdlahw_t));
-	card->hw.port    = conf->ioport;
-	card->hw.irq     = (conf->irq == 9) ? 2 : conf->irq;
-	/* Compute the virtual address of the card in kernel space */
-	if(conf->maddr)
-		card->hw.dpmbase = phys_to_virt(conf->maddr);
-	else	/* But 0 means NULL */
-		card->hw.dpmbase = (void *)conf->maddr;
-
-	card->hw.dpmsize = SDLA_WINDOWSIZE;
-	card->hw.type    = conf->hw_opt[0];
-	card->hw.pclk    = conf->hw_opt[1];
-	err = sdla_setup(&card->hw, conf->data, conf->data_size);
-	if (err)
-	{
-		free_irq(irq, card);
-		return err;
-	}
-
-	/* Intialize WAN device data space */
-	wandev->irq       = irq;
-	wandev->dma       = 0;
-	wandev->ioport    = card->hw.port;
-	wandev->maddr     = card->hw.dpmbase;
-	wandev->msize     = card->hw.dpmsize;
-	wandev->hw_opt[0] = card->hw.type;
-	wandev->hw_opt[1] = card->hw.pclk;
-	wandev->hw_opt[2] = card->hw.memory;
-	wandev->hw_opt[3] = card->hw.fwid;
-
-	/* Protocol-specific initialization */
-	switch (card->hw.fwid)
-	{
-#ifdef	CONFIG_WANPIPE_X25
-	case SFID_X25_502:
-	case SFID_X25_508:
-		err = wpx_init(card, conf);
-		break;
-#endif
-
-#ifdef	CONFIG_WANPIPE_FR
-	case SFID_FR502:
-	case SFID_FR508:
-		err = wpf_init(card, conf);
-		break;
-#endif
-
-#ifdef	CONFIG_WANPIPE_PPP
-	case SFID_PPP502:
-	case SFID_PPP508:
-		err = wpp_init(card, conf);
-		break;
-#endif
-
-	default:
-		printk(KERN_ERR "%s: this firmware is not supported!\n",
-			wandev->name)
-		;
-		err = -EINVAL;
-	}
-	if (err)
-	{
-		sdla_down(&card->hw);
-		free_irq(irq, card);
-		return err;
-	}
-  	/* Reserve I/O region and schedule background task */
-/*	printk(KERN_INFO "about to request\n");*/
-	request_region(card->hw.port, card->hw.io_range, wandev->name);
-/*	printk(KERN_INFO "request done\n");*/
-	if (++active == 1)
-		queue_task(&sdla_tq, &tq_scheduler);
-		
-	wandev->critical = 0;
-	return 0;
-}
-
-/*============================================================================
- * Shut down WAN link driver. 
- * o shut down adapter hardware
- * o release system resources.
- *
- * This function is called by the router when device is being unregistered or
- * when it handles ROUTER_DOWN IOCTL.
- */
-static int shutdown (wan_device_t* wandev)
-{
-	sdla_t* card;
-
-	/* sanity checks */
-	if ((wandev == NULL) || (wandev->private == NULL))
-		return -EFAULT;
-		
-	if (wandev->state == WAN_UNCONFIGURED)
-		return 0;
-		
-	/* If wee are in a critical section we lose */
-	if (test_and_set_bit(0, (void*)&wandev->critical))
-		return -EAGAIN;
-		
-	card = wandev->private;
-	wandev->state = WAN_UNCONFIGURED;
-
-	if (--active == 0)
-		schedule();	/* stop background thread */
-	
-/*	printk(KERN_INFO "active now %d\n", active);
-
-	printk(KERN_INFO "About to call sdla_down\n");*/
-	sdla_down(&card->hw);
-/*	printk(KERN_INFO "sdla_down done\n");
-	printk(KERN_INFO "About to call free_irq\n");*/
-	free_irq(wandev->irq, card);
-/*	printk(KERN_INFO "free_irq done\n");
-	printk(KERN_INFO "About to call release_region\n");*/
-	release_region(card->hw.port, card->hw.io_range);
-/*	printk(KERN_INFO "release_region done\n");*/
-	wandev->critical = 0;
-	return 0;
-}
-
-/*============================================================================
- * Driver I/O control. 
- * o verify arguments
- * o perform requested action
- *
- * This function is called when router handles one of the reserved user
- * IOCTLs.  Note that 'arg' stil points to user address space.
- */
-static int ioctl (wan_device_t* wandev, unsigned cmd, unsigned long arg)
-{
-	int err;
-
-	/* sanity checks */
-	if ((wandev == NULL) || (wandev->private == NULL))
-		return -EFAULT
-	;
-	if (wandev->state == WAN_UNCONFIGURED)
-		return -ENODEV
-	;
-	if (test_and_set_bit(0, (void*)&wandev->critical))
-		return -EAGAIN
-	;
-	switch (cmd)
-	{
-	case WANPIPE_DUMP:
-		err = ioctl_dump(wandev->private, (void*)arg);
-		break;
-
-	case WANPIPE_EXEC:
-		err = ioctl_exec(wandev->private, (void*)arg);
-		break;
-
-	default:
-		err = -EINVAL;
-	}
-	wandev->critical = 0;
-	return err;
-}
-
-/****** Driver IOCTL Hanlers ************************************************/
-
-/*============================================================================
- * Dump adapter memory to user buffer.
- * o verify request structure
- * o copy request structure to kernel data space
- * o verify length/offset
- * o verify user buffer
- * o copy adapter memory image to user buffer
- *
- * Note: when dumping memory, this routine switches curent dual-port memory
- *	 vector, so care must be taken to avoid racing conditions.
- */
-static int ioctl_dump (sdla_t* card, sdla_dump_t* u_dump)
-{
-	sdla_dump_t dump;
-	unsigned winsize;
-	unsigned long oldvec;	/* DPM window vector */
-	unsigned long flags;
-	int err = 0;
-
-	if(copy_from_user((void*)&dump, (void*)u_dump, sizeof(sdla_dump_t)))
-		return -EFAULT;
-		
-	if ((dump.magic != WANPIPE_MAGIC) ||
-	    (dump.offset + dump.length > card->hw.memory))
-		return -EINVAL;
-		
-	winsize = card->hw.dpmsize;
-	save_flags(flags);
-        cli();				/* >>> critical section start <<< */
-	oldvec = card->hw.vector;
-	while (dump.length)
-	{
-		unsigned pos = dump.offset % winsize;	/* current offset */
-		unsigned long vec = dump.offset - pos;	/* current vector */
-		unsigned len = (dump.length > (winsize - pos)) ?
-			(winsize - pos) : dump.length
-		;
-		if (sdla_mapmem(&card->hw, vec) != 0)	/* relocate window */
-		{
-			err = -EIO;
-			break;
-		}
-		/* FIXME::: COPY TO KERNEL BUFFER FIRST ?? */
-		sti();	/* Not ideal but tough we have to do this */
-		if(copy_to_user((void *)dump.ptr,
-			(u8 *)card->hw.dpmbase + pos, len))	
-			return -EFAULT;
-		cli();
-		dump.length     -= len;
-		dump.offset     += len;
-		(char*)dump.ptr += len;
-	}
-	sdla_mapmem(&card->hw, oldvec);	/* restore DPM window position */
-	restore_flags(flags);		/* >>> critical section end <<< */
-	return err;
-}
-
-/*============================================================================
- * Execute adapter firmware command.
- * o verify request structure
- * o copy request structure to kernel data space
- * o call protocol-specific 'exec' function
- */
-static int ioctl_exec (sdla_t* card, sdla_exec_t* u_exec)
-{
-	sdla_exec_t exec;
-
-	if (card->exec == NULL)
-		return -ENODEV;
-		
-	if(copy_from_user((void*)&exec, (void*)u_exec, sizeof(sdla_exec_t)))
-		return -EFAULT;
-	if ((exec.magic != WANPIPE_MAGIC) || (exec.cmd == NULL))
-		return -EINVAL;
-	return card->exec(card, exec.cmd, exec.data);
-}
-
-/******* Miscellaneous ******************************************************/
-
-/*============================================================================
- * SDLA Interrupt Service Routine.
- * o acknowledge SDLA hardware interrupt.
- * o call protocol-specific interrupt service routine, if any.
- */
-STATIC void sdla_isr (int irq, void* dev_id, struct pt_regs *regs)
-{
-#define	card	((sdla_t*)dev_id)
-
-	if (!card || (card->wandev.state == WAN_UNCONFIGURED))
-		return
-	;
-	if (card->in_isr)
-	{
-		printk(KERN_WARNING "%s: interrupt re-entrancy on IRQ %d!\n",
-			card->devname, card->wandev.irq)
-		;
-		return;
-	}
-
-	sdla_intack(&card->hw);
-	if (card->isr) 
-		card->isr(card);
-
-#undef	card
-}
-
-/*============================================================================
- * SDLA polling routine.
- * This routine simulates kernel thread to perform various housekeeping job.
- *
- * o for each configured device call its poll() routine
- * o if there is at least one active card, then reschedule itself once again
- */
-STATIC void sdla_poll (void* data)
-{
-	int i;
-
-	for (i = 0; i < ncards; ++i)
-	{
-		sdla_t* card = &card_array[i];
-
-		if ((card->wandev.state != WAN_UNCONFIGURED) && card->poll &&
-		    !card->wandev.critical)
-		{
-			card->poll(card);
-		}
-	}
-	if (active)
-		queue_task(&sdla_tq, &tq_scheduler);
-}
-
-/*============================================================================
- * This routine is called by the protocol-specific modules when network
- * interface is being open.  The only reason we need this, is because we
- * have to call MOD_INC_USE_COUNT, but cannot include 'module.h' where it's
- * defined more than once into the same kernel module.
- */
-void wanpipe_open (sdla_t* card)
-{
-	++card->open_cnt;
-	MOD_INC_USE_COUNT;
-}
-
-/*============================================================================
- * This routine is called by the protocol-specific modules when network
- * interface is being closed.  The only reason we need this, is because we
- * have to call MOD_DEC_USE_COUNT, but cannot include 'module.h' where it's
- * defined more than once into the same kernel module.
- */
-void wanpipe_close (sdla_t* card)
-{
-	--card->open_cnt;
-	MOD_DEC_USE_COUNT;
-}
-
-/*============================================================================
- * Set WAN device state.
- */
-void wanpipe_set_state (sdla_t* card, int state)
-{
-	unsigned long flags;
-
-	save_flags(flags);
-	cli();
-	if (card->wandev.state != state)
-	{
-		switch (state)
-		{
-		case WAN_CONNECTED:
-			printk (KERN_INFO "%s: link connected!\n",
-				card->devname)
-			;
-			break;
-
-		case WAN_CONNECTING:
-			printk (KERN_INFO "%s: link connecting...\n",
-				card->devname)
-			;
-			break;
-
-		case WAN_DISCONNECTED:
-			printk (KERN_INFO "%s: link disconnected!\n",
-				card->devname)
-			;
-			break;
-		}
-		card->wandev.state = state;
-	}
-	card->state_tick = jiffies;
-	restore_flags(flags);
-}
-
-/****** End *****************************************************************/
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