1 files changed, 351 insertions, 0 deletions

diff --git a/drivers/net/wan/cycx_main.c b/drivers/net/wan/cycx_main.c
new file mode 100644
index 000000000000..7b48064364dc
--- /dev/null
+++ b/drivers/net/wan/cycx_main.c
@@ -0,0 +1,351 @@
+/*
+* cycx_main.c	Cyclades Cyclom 2X WAN Link Driver. Main module.
+*
+* Author:	Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+*
+* Copyright:	(c) 1998-2003 Arnaldo Carvalho de Melo
+*
+* Based on sdlamain.c by Gene Kozin <genek@compuserve.com> &
+*			 Jaspreet Singh	<jaspreet@sangoma.com>
+*
+*		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.
+* ============================================================================
+* Please look at the bitkeeper changelog (or any other scm tool that ends up
+* importing bitkeeper changelog or that replaces bitkeeper in the future as
+* main tool for linux development).
+* 
+* 2001/05/09	acme		Fix MODULE_DESC for debug, .bss nitpicks,
+* 				some cleanups
+* 2000/07/13	acme		remove useless #ifdef MODULE and crap
+*				#if KERNEL_VERSION > blah
+* 2000/07/06	acme		__exit at cyclomx_cleanup
+* 2000/04/02	acme		dprintk and cycx_debug
+* 				module_init/module_exit
+* 2000/01/21	acme		rename cyclomx_open to cyclomx_mod_inc_use_count
+*				and cyclomx_close to cyclomx_mod_dec_use_count
+* 2000/01/08	acme		cleanup
+* 1999/11/06	acme		cycx_down back to life (it needs to be
+*				called to iounmap the dpmbase)
+* 1999/08/09	acme		removed references to enable_tx_int
+*				use spinlocks instead of cli/sti in
+*				cyclomx_set_state
+* 1999/05/19	acme		works directly linked into the kernel
+*				init_waitqueue_head for 2.3.* kernel
+* 1999/05/18	acme		major cleanup (polling not needed), etc
+* 1998/08/28	acme		minor cleanup (ioctls for firmware deleted)
+*				queue_task activated
+* 1998/08/08	acme		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/slab.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/wanrouter.h>	/* WAN router definitions */
+#include <linux/cyclomx.h>	/* cyclomx common user API definitions */
+#include <linux/init.h>         /* __init (when not using as a module) */
+
+unsigned int cycx_debug;
+
+MODULE_AUTHOR("Arnaldo Carvalho de Melo");
+MODULE_DESCRIPTION("Cyclom 2X Sync Card Driver.");
+MODULE_LICENSE("GPL");
+module_param(cycx_debug, int, 0);
+MODULE_PARM_DESC(cycx_debug, "cyclomx debug level");
+
+/* Defines & Macros */
+
+#define	CYCX_DRV_VERSION	0	/* version number */
+#define	CYCX_DRV_RELEASE	11	/* release (minor version) number */
+#define	CYCX_MAX_CARDS		1	/* max number of adapters */
+
+#define	CONFIG_CYCX_CARDS 1
+
+/* Function Prototypes */
+
+/* WAN link driver entry points */
+static int cycx_wan_setup(struct wan_device *wandev, wandev_conf_t *conf);
+static int cycx_wan_shutdown(struct wan_device *wandev);
+
+/* Miscellaneous functions */
+static irqreturn_t cycx_isr(int irq, void *dev_id, struct pt_regs *regs);
+
+/* Global Data
+ * Note: All data must be explicitly initialized!!!
+ */
+
+/* private data */
+static char cycx_drvname[] = "cyclomx";
+static char cycx_fullname[] = "CYCLOM 2X(tm) Sync Card Driver";
+static char cycx_copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
+			  "<acme@conectiva.com.br>";
+static int cycx_ncards = CONFIG_CYCX_CARDS;
+static struct cycx_device *cycx_card_array;	/* adapter data space */
+
+/* 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 Cyclom 2X shared memory access delay.
+ *
+ * Return:	0	Ok
+ *		< 0	error.
+ * Context:	process
+ */
+int __init cycx_init(void)
+{
+	int cnt, err = -ENOMEM;
+
+	printk(KERN_INFO "%s v%u.%u %s\n",
+		cycx_fullname, CYCX_DRV_VERSION, CYCX_DRV_RELEASE,
+		cycx_copyright);
+
+	/* Verify number of cards and allocate adapter data space */
+	cycx_ncards = min_t(int, cycx_ncards, CYCX_MAX_CARDS);
+	cycx_ncards = max_t(int, cycx_ncards, 1);
+	cycx_card_array = kmalloc(sizeof(struct cycx_device) * cycx_ncards,
+				  GFP_KERNEL);
+	if (!cycx_card_array)
+		goto out;
+
+	memset(cycx_card_array, 0, sizeof(struct cycx_device) * cycx_ncards);
+
+	/* Register adapters with WAN router */
+	for (cnt = 0; cnt < cycx_ncards; ++cnt) {
+		struct cycx_device *card = &cycx_card_array[cnt];
+		struct wan_device *wandev = &card->wandev;
+
+		sprintf(card->devname, "%s%d", cycx_drvname, cnt + 1);
+		wandev->magic    = ROUTER_MAGIC;
+		wandev->name     = card->devname;
+		wandev->private  = card;
+		wandev->setup    = cycx_wan_setup;
+		wandev->shutdown = cycx_wan_shutdown;
+		err = register_wan_device(wandev);
+
+		if (err) {
+			printk(KERN_ERR "%s: %s registration failed with "
+					"error %d!\n",
+					cycx_drvname, card->devname, err);
+			break;
+		}
+	}
+
+	err = -ENODEV;
+	if (!cnt) {
+		kfree(cycx_card_array);
+		goto out;
+	}
+	err = 0;
+	cycx_ncards = cnt;	/* adjust actual number of cards */
+out:	return err;
+}
+
+/*
+ * Module 'remove' entry point.
+ * o unregister all adapters from the WAN router
+ * o release all remaining system resources
+ */
+static void __exit cycx_exit(void)
+{
+	int i = 0;
+
+	for (; i < cycx_ncards; ++i) {
+		struct cycx_device *card = &cycx_card_array[i];
+		unregister_wan_device(card->devname);
+	}
+
+	kfree(cycx_card_array);
+}
+
+/* WAN Device Driver Entry Points */
+/*
+ * Setup/configure WAN link driver.
+ * o check adapter state
+ * o make sure firmware is present in configuration
+ * o allocate interrupt vector
+ * o setup Cyclom 2X hardware
+ * o call appropriate routine to perform protocol-specific initialization
+ *
+ * This function is called when router handles ROUTER_SETUP IOCTL. The
+ * configuration structure is in kernel memory (including extended data, if
+ * any).
+ */
+static int cycx_wan_setup(struct wan_device *wandev, wandev_conf_t *conf)
+{
+	int rc = -EFAULT;
+	struct cycx_device *card;
+	int irq;
+
+	/* Sanity checks */
+
+	if (!wandev || !wandev->private || !conf)
+		goto out;
+
+	card = wandev->private;
+	rc = -EBUSY;
+	if (wandev->state != WAN_UNCONFIGURED)
+		goto out;
+
+	rc = -EINVAL;
+	if (!conf->data_size || !conf->data) {
+		printk(KERN_ERR "%s: firmware not found in configuration "
+				"data!\n", wandev->name);
+		goto out;
+	}
+
+	if (conf->irq <= 0) {
+		printk(KERN_ERR "%s: can't configure without IRQ!\n",
+				wandev->name);
+		goto out;
+	}
+
+	/* Allocate IRQ */
+	irq = conf->irq == 2 ? 9 : conf->irq;	/* IRQ2 -> IRQ9 */
+
+	if (request_irq(irq, cycx_isr, 0, wandev->name, card)) {
+		printk(KERN_ERR "%s: can't reserve IRQ %d!\n",
+				wandev->name, irq);
+		goto out;
+	}
+
+	/* Configure hardware, load firmware, etc. */
+	memset(&card->hw, 0, sizeof(card->hw));
+	card->hw.irq	 = irq;
+	card->hw.dpmsize = CYCX_WINDOWSIZE;
+	card->hw.fwid	 = CFID_X25_2X;
+	spin_lock_init(&card->lock);
+	init_waitqueue_head(&card->wait_stats);
+
+	rc = cycx_setup(&card->hw, conf->data, conf->data_size, conf->maddr);
+	if (rc)
+		goto out_irq;
+
+	/* Initialize WAN device data space */
+	wandev->irq       = irq;
+	wandev->dma       = wandev->ioport = 0;
+	wandev->maddr     = (unsigned long)card->hw.dpmbase;
+	wandev->msize     = card->hw.dpmsize;
+	wandev->hw_opt[2] = 0;
+	wandev->hw_opt[3] = card->hw.fwid;
+
+	/* Protocol-specific initialization */
+	switch (card->hw.fwid) {
+#ifdef CONFIG_CYCLOMX_X25
+	case CFID_X25_2X:
+		rc = cycx_x25_wan_init(card, conf);
+		break;
+#endif
+	default:
+		printk(KERN_ERR "%s: this firmware is not supported!\n",
+				wandev->name);
+		rc = -EINVAL;
+	}
+
+	if (rc) {
+		cycx_down(&card->hw);
+		goto out_irq;
+	}
+
+	rc = 0;
+out:
+	return rc;
+out_irq:
+	free_irq(irq, card);
+	goto out;
+}
+
+/*
+ * 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 cycx_wan_shutdown(struct wan_device *wandev)
+{
+	int ret = -EFAULT;
+	struct cycx_device *card;
+
+	/* sanity checks */
+	if (!wandev || !wandev->private)
+		goto out;
+
+	ret = 0;
+	if (wandev->state == WAN_UNCONFIGURED)
+		goto out;
+
+	card = wandev->private;
+	wandev->state = WAN_UNCONFIGURED;
+	cycx_down(&card->hw);
+	printk(KERN_INFO "%s: irq %d being freed!\n", wandev->name,
+			wandev->irq);
+	free_irq(wandev->irq, card);
+out:	return ret;
+}
+
+/* Miscellaneous */
+/*
+ * Cyclom 2X Interrupt Service Routine.
+ * o acknowledge Cyclom 2X hardware interrupt.
+ * o call protocol-specific interrupt service routine, if any.
+ */
+static irqreturn_t cycx_isr(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct cycx_device *card = (struct cycx_device *)dev_id;
+
+	if (!card || card->wandev.state == WAN_UNCONFIGURED)
+		goto out;
+
+	if (card->in_isr) {
+		printk(KERN_WARNING "%s: interrupt re-entrancy on IRQ %d!\n",
+				    card->devname, card->wandev.irq);
+		goto out;
+	}
+
+	if (card->isr)
+		card->isr(card);
+	return IRQ_HANDLED;
+out:
+	return IRQ_NONE;
+}
+
+/* Set WAN device state.  */
+void cycx_set_state(struct cycx_device *card, int state)
+{
+	unsigned long flags;
+	char *string_state = NULL;
+
+	spin_lock_irqsave(&card->lock, flags);
+
+	if (card->wandev.state != state) {
+		switch (state) {
+		case WAN_CONNECTED:
+			string_state = "connected!";
+			break;
+		case WAN_DISCONNECTED:
+			string_state = "disconnected!";
+			break;
+		}
+		printk(KERN_INFO "%s: link %s\n", card->devname, string_state);
+		card->wandev.state = state;
+	}
+
+	card->state_tick = jiffies;
+	spin_unlock_irqrestore(&card->lock, flags);
+}
+
+module_init(cycx_init);
+module_exit(cycx_exit);