drivers/tty/ipwireless/main.c - kernel/quantenna - Git at Google

 /*
  * IPWireless 3G PCMCIA Network Driver
  *
  * Original code
  *   by Stephen Blackheath <stephen@blacksapphire.com>,
  *      Ben Martel <benm@symmetric.co.nz>
  *
  * Copyrighted as follows:
  *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
  *
  * Various driver changes and rewrites, port to new kernels
  *   Copyright (C) 2006-2007 Jiri Kosina
  *
  * Misc code cleanups and updates
  *   Copyright (C) 2007 David Sterba
  */

 #include "hardware.h"
 #include "network.h"
 #include "main.h"
 #include "tty.h"

 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/slab.h>

 #include <pcmcia/cisreg.h>
 #include <pcmcia/device_id.h>
 #include <pcmcia/ss.h>
 #include <pcmcia/ds.h>

 static const struct pcmcia_device_id ipw_ids[] = {
 	PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100),
 	PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200),
 	PCMCIA_DEVICE_NULL
 };
 MODULE_DEVICE_TABLE(pcmcia, ipw_ids);

 static void ipwireless_detach(struct pcmcia_device *link);

 /*
  * Module params
  */
 /* Debug mode: more verbose, print sent/recv bytes */
 int ipwireless_debug;
 int ipwireless_loopback;
 int ipwireless_out_queue = 10;

 module_param_named(debug, ipwireless_debug, int, 0);
 module_param_named(loopback, ipwireless_loopback, int, 0);
 module_param_named(out_queue, ipwireless_out_queue, int, 0);
 MODULE_PARM_DESC(debug, "switch on debug messages [0]");
 MODULE_PARM_DESC(loopback,
 		"debug: enable ras_raw channel [0]");
 MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");

 /* Executes in process context. */
 static void signalled_reboot_work(struct work_struct *work_reboot)
 {
 	struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev,
 			work_reboot);
 	struct pcmcia_device *link = ipw->link;
 	pcmcia_reset_card(link->socket);
 }

 static void signalled_reboot_callback(void *callback_data)
 {
 	struct ipw_dev *ipw = (struct ipw_dev *) callback_data;

 	/* Delegate to process context. */
 	schedule_work(&ipw->work_reboot);
 }

 static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
 {
 	struct ipw_dev *ipw = priv_data;
 	int ret;

 	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;

 	/* 0x40 causes it to generate level mode interrupts. */
 	/* 0x04 enables IREQ pin. */
 	p_dev->config_index |= 0x44;
 	p_dev->io_lines = 16;
 	ret = pcmcia_request_io(p_dev);
 	if (ret)
 		return ret;

 	if (!request_region(p_dev->resource[0]->start,
 			    resource_size(p_dev->resource[0]),
 			    IPWIRELESS_PCCARD_NAME)) {
 		ret = -EBUSY;
 		goto exit;
 	}

 	p_dev->resource[2]->flags |=
 		WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;

 	ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
 	if (ret != 0)
 		goto exit1;

 	ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
 	if (ret != 0)
 		goto exit1;

 	ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;

 	ipw->common_memory = ioremap(p_dev->resource[2]->start,
 				resource_size(p_dev->resource[2]));
 	if (!request_mem_region(p_dev->resource[2]->start,
 				resource_size(p_dev->resource[2]),
 				IPWIRELESS_PCCARD_NAME)) {
 		ret = -EBUSY;
 		goto exit2;
 	}

 	p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
 					WIN_ENABLE;
 	p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
 	ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
 	if (ret != 0)
 		goto exit3;

 	ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
 	if (ret != 0)
 		goto exit3;

 	ipw->attr_memory = ioremap(p_dev->resource[3]->start,
 				resource_size(p_dev->resource[3]));
 	if (!request_mem_region(p_dev->resource[3]->start,
 				resource_size(p_dev->resource[3]),
 				IPWIRELESS_PCCARD_NAME)) {
 		ret = -EBUSY;
 		goto exit4;
 	}

 	return 0;

 exit4:
 	iounmap(ipw->attr_memory);
 exit3:
 	release_mem_region(p_dev->resource[2]->start,
 			resource_size(p_dev->resource[2]));
 exit2:
 	iounmap(ipw->common_memory);
 exit1:
 	release_region(p_dev->resource[0]->start,
 		       resource_size(p_dev->resource[0]));
 exit:
 	pcmcia_disable_device(p_dev);
 	return ret;
 }

 static int config_ipwireless(struct ipw_dev *ipw)
 {
 	struct pcmcia_device *link = ipw->link;
 	int ret = 0;

 	ipw->is_v2_card = 0;
 	link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
 		CONF_ENABLE_IRQ;

 	ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
 	if (ret != 0)
 		return ret;

 	INIT_WORK(&ipw->work_reboot, signalled_reboot_work);

 	ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
 				    ipw->attr_memory, ipw->common_memory,
 				    ipw->is_v2_card, signalled_reboot_callback,
 				    ipw);

 	ret = pcmcia_request_irq(link, ipwireless_interrupt);
 	if (ret != 0)
 		goto exit;

 	printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 			ipw->is_v2_card ? "V2/V3" : "V1");
 	printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 		": I/O ports %pR, irq %d\n", link->resource[0],
 			(unsigned int) link->irq);
 	if (ipw->attr_memory && ipw->common_memory)
 		printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 			": attr memory %pR, common memory %pR\n",
 			link->resource[3],
 			link->resource[2]);

 	ipw->network = ipwireless_network_create(ipw->hardware);
 	if (!ipw->network)
 		goto exit;

 	ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
 	if (!ipw->tty)
 		goto exit;

 	ipwireless_init_hardware_v2_v3(ipw->hardware);

 	/*
 	 * Do the RequestConfiguration last, because it enables interrupts.
 	 * Then we don't get any interrupts before we're ready for them.
 	 */
 	ret = pcmcia_enable_device(link);
 	if (ret != 0)
 		goto exit;

 	return 0;

 exit:
 	if (ipw->common_memory) {
 		release_mem_region(link->resource[2]->start,
 				resource_size(link->resource[2]));
 		iounmap(ipw->common_memory);
 	}
 	if (ipw->attr_memory) {
 		release_mem_region(link->resource[3]->start,
 				resource_size(link->resource[3]));
 		iounmap(ipw->attr_memory);
 	}
 	pcmcia_disable_device(link);
 	return -1;
 }

 static void release_ipwireless(struct ipw_dev *ipw)
 {
 	release_region(ipw->link->resource[0]->start,
 		       resource_size(ipw->link->resource[0]));
 	if (ipw->common_memory) {
 		release_mem_region(ipw->link->resource[2]->start,
 				resource_size(ipw->link->resource[2]));
 		iounmap(ipw->common_memory);
 	}
 	if (ipw->attr_memory) {
 		release_mem_region(ipw->link->resource[3]->start,
 				resource_size(ipw->link->resource[3]));
 		iounmap(ipw->attr_memory);
 	}
 	pcmcia_disable_device(ipw->link);
 }

 /*
  * ipwireless_attach() creates an "instance" of the driver, allocating
  * local data structures for one device (one interface).  The device
  * is registered with Card Services.
  *
  * The pcmcia_device structure is initialized, but we don't actually
  * configure the card at this point -- we wait until we receive a
  * card insertion event.
  */
 static int ipwireless_attach(struct pcmcia_device *link)
 {
 	struct ipw_dev *ipw;
 	int ret;

 	ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
 	if (!ipw)
 		return -ENOMEM;

 	ipw->link = link;
 	link->priv = ipw;

 	ipw->hardware = ipwireless_hardware_create();
 	if (!ipw->hardware) {
 		kfree(ipw);
 		return -ENOMEM;
 	}
 	/* RegisterClient will call config_ipwireless */

 	ret = config_ipwireless(ipw);

 	if (ret != 0) {
 		ipwireless_detach(link);
 		return ret;
 	}

 	return 0;
 }

 /*
  * This deletes a driver "instance".  The device is de-registered with
  * Card Services.  If it has been released, all local data structures
  * are freed.  Otherwise, the structures will be freed when the device
  * is released.
  */
 static void ipwireless_detach(struct pcmcia_device *link)
 {
 	struct ipw_dev *ipw = link->priv;

 	release_ipwireless(ipw);

 	if (ipw->tty != NULL)
 		ipwireless_tty_free(ipw->tty);
 	if (ipw->network != NULL)
 		ipwireless_network_free(ipw->network);
 	if (ipw->hardware != NULL)
 		ipwireless_hardware_free(ipw->hardware);
 	kfree(ipw);
 }

 static struct pcmcia_driver me = {
 	.owner		= THIS_MODULE,
 	.probe          = ipwireless_attach,
 	.remove         = ipwireless_detach,
 	.name		= IPWIRELESS_PCCARD_NAME,
 	.id_table       = ipw_ids
 };

 /*
  * Module insertion : initialisation of the module.
  * Register the card with cardmgr...
  */
 static int __init init_ipwireless(void)
 {
 	int ret;

 	ret = ipwireless_tty_init();
 	if (ret != 0)
 		return ret;

 	ret = pcmcia_register_driver(&me);
 	if (ret != 0)
 		ipwireless_tty_release();

 	return ret;
 }

 /*
  * Module removal
  */
 static void __exit exit_ipwireless(void)
 {
 	pcmcia_unregister_driver(&me);
 	ipwireless_tty_release();
 }

 module_init(init_ipwireless);
 module_exit(exit_ipwireless);

 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 MODULE_LICENSE("GPL");
	/*
	* IPWireless 3G PCMCIA Network Driver
	*
	* Original code
	* by Stephen Blackheath <stephen@blacksapphire.com>,
	* Ben Martel <benm@symmetric.co.nz>
	*
	* Copyrighted as follows:
	* Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
	*
	* Various driver changes and rewrites, port to new kernels
	* Copyright (C) 2006-2007 Jiri Kosina
	*
	* Misc code cleanups and updates
	* Copyright (C) 2007 David Sterba
	*/

	#include "hardware.h"
	#include "network.h"
	#include "main.h"
	#include "tty.h"

	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/sched.h>
	#include <linux/slab.h>

	#include <pcmcia/cisreg.h>
	#include <pcmcia/device_id.h>
	#include <pcmcia/ss.h>
	#include <pcmcia/ds.h>

	static const struct pcmcia_device_id ipw_ids[] = {
	PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100),
	PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200),
	PCMCIA_DEVICE_NULL
	};
	MODULE_DEVICE_TABLE(pcmcia, ipw_ids);

	static void ipwireless_detach(struct pcmcia_device *link);

	/*
	* Module params
	*/
	/* Debug mode: more verbose, print sent/recv bytes */
	int ipwireless_debug;
	int ipwireless_loopback;
	int ipwireless_out_queue = 10;

	module_param_named(debug, ipwireless_debug, int, 0);
	module_param_named(loopback, ipwireless_loopback, int, 0);
	module_param_named(out_queue, ipwireless_out_queue, int, 0);
	MODULE_PARM_DESC(debug, "switch on debug messages [0]");
	MODULE_PARM_DESC(loopback,
	"debug: enable ras_raw channel [0]");
	MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");

	/* Executes in process context. */
	static void signalled_reboot_work(struct work_struct *work_reboot)
	{
	struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev,
	work_reboot);
	struct pcmcia_device *link = ipw->link;
	pcmcia_reset_card(link->socket);
	}

	static void signalled_reboot_callback(void *callback_data)
	{
	struct ipw_dev ipw = (struct ipw_dev ) callback_data;

	/* Delegate to process context. */
	schedule_work(&ipw->work_reboot);
	}

	static int ipwireless_probe(struct pcmcia_device p_dev, void priv_data)
	{
	struct ipw_dev *ipw = priv_data;
	int ret;

	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
	p_dev->resource[0]->flags \|= IO_DATA_PATH_WIDTH_AUTO;

	/* 0x40 causes it to generate level mode interrupts. */
	/* 0x04 enables IREQ pin. */
	p_dev->config_index \|= 0x44;
	p_dev->io_lines = 16;
	ret = pcmcia_request_io(p_dev);
	if (ret)
	return ret;

	if (!request_region(p_dev->resource[0]->start,
	resource_size(p_dev->resource[0]),
	IPWIRELESS_PCCARD_NAME)) {
	ret = -EBUSY;
	goto exit;
	}

	p_dev->resource[2]->flags \|=
	WIN_DATA_WIDTH_16 \| WIN_MEMORY_TYPE_CM \| WIN_ENABLE;

	ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
	if (ret != 0)
	goto exit1;

	ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
	if (ret != 0)
	goto exit1;

	ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;

	ipw->common_memory = ioremap(p_dev->resource[2]->start,
	resource_size(p_dev->resource[2]));
	if (!request_mem_region(p_dev->resource[2]->start,
	resource_size(p_dev->resource[2]),
	IPWIRELESS_PCCARD_NAME)) {
	ret = -EBUSY;
	goto exit2;
	}

	p_dev->resource[3]->flags \|= WIN_DATA_WIDTH_16 \| WIN_MEMORY_TYPE_AM \|
	WIN_ENABLE;
	p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
	ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
	if (ret != 0)
	goto exit3;

	ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
	if (ret != 0)
	goto exit3;

	ipw->attr_memory = ioremap(p_dev->resource[3]->start,
	resource_size(p_dev->resource[3]));
	if (!request_mem_region(p_dev->resource[3]->start,
	resource_size(p_dev->resource[3]),
	IPWIRELESS_PCCARD_NAME)) {
	ret = -EBUSY;
	goto exit4;
	}

	return 0;

	exit4:
	iounmap(ipw->attr_memory);
	exit3:
	release_mem_region(p_dev->resource[2]->start,
	resource_size(p_dev->resource[2]));
	exit2:
	iounmap(ipw->common_memory);
	exit1:
	release_region(p_dev->resource[0]->start,
	resource_size(p_dev->resource[0]));
	exit:
	pcmcia_disable_device(p_dev);
	return ret;
	}

	static int config_ipwireless(struct ipw_dev *ipw)
	{
	struct pcmcia_device *link = ipw->link;
	int ret = 0;

	ipw->is_v2_card = 0;
	link->config_flags \|= CONF_AUTO_SET_IO \| CONF_AUTO_SET_IOMEM \|
	CONF_ENABLE_IRQ;

	ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
	if (ret != 0)
	return ret;

	INIT_WORK(&ipw->work_reboot, signalled_reboot_work);

	ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
	ipw->attr_memory, ipw->common_memory,
	ipw->is_v2_card, signalled_reboot_callback,
	ipw);

	ret = pcmcia_request_irq(link, ipwireless_interrupt);
	if (ret != 0)
	goto exit;

	printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
	ipw->is_v2_card ? "V2/V3" : "V1");
	printk(KERN_INFO IPWIRELESS_PCCARD_NAME
	": I/O ports %pR, irq %d\n", link->resource[0],
	(unsigned int) link->irq);
	if (ipw->attr_memory && ipw->common_memory)
	printk(KERN_INFO IPWIRELESS_PCCARD_NAME
	": attr memory %pR, common memory %pR\n",
	link->resource[3],
	link->resource[2]);

	ipw->network = ipwireless_network_create(ipw->hardware);
	if (!ipw->network)
	goto exit;

	ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
	if (!ipw->tty)
	goto exit;

	ipwireless_init_hardware_v2_v3(ipw->hardware);

	/*
	* Do the RequestConfiguration last, because it enables interrupts.
	* Then we don't get any interrupts before we're ready for them.
	*/
	ret = pcmcia_enable_device(link);
	if (ret != 0)
	goto exit;

	return 0;

	exit:
	if (ipw->common_memory) {
	release_mem_region(link->resource[2]->start,
	resource_size(link->resource[2]));
	iounmap(ipw->common_memory);
	}
	if (ipw->attr_memory) {
	release_mem_region(link->resource[3]->start,
	resource_size(link->resource[3]));
	iounmap(ipw->attr_memory);
	}
	pcmcia_disable_device(link);
	return -1;
	}

	static void release_ipwireless(struct ipw_dev *ipw)
	{
	release_region(ipw->link->resource[0]->start,
	resource_size(ipw->link->resource[0]));
	if (ipw->common_memory) {
	release_mem_region(ipw->link->resource[2]->start,
	resource_size(ipw->link->resource[2]));
	iounmap(ipw->common_memory);
	}
	if (ipw->attr_memory) {
	release_mem_region(ipw->link->resource[3]->start,
	resource_size(ipw->link->resource[3]));
	iounmap(ipw->attr_memory);
	}
	pcmcia_disable_device(ipw->link);
	}

	/*
	* ipwireless_attach() creates an "instance" of the driver, allocating
	* local data structures for one device (one interface). The device
	* is registered with Card Services.
	*
	* The pcmcia_device structure is initialized, but we don't actually
	* configure the card at this point -- we wait until we receive a
	* card insertion event.
	*/
	static int ipwireless_attach(struct pcmcia_device *link)
	{
	struct ipw_dev *ipw;
	int ret;

	ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
	if (!ipw)
	return -ENOMEM;

	ipw->link = link;
	link->priv = ipw;

	ipw->hardware = ipwireless_hardware_create();
	if (!ipw->hardware) {
	kfree(ipw);
	return -ENOMEM;
	}
	/* RegisterClient will call config_ipwireless */

	ret = config_ipwireless(ipw);

	if (ret != 0) {
	ipwireless_detach(link);
	return ret;
	}

	return 0;
	}

	/*
	* This deletes a driver "instance". The device is de-registered with
	* Card Services. If it has been released, all local data structures
	* are freed. Otherwise, the structures will be freed when the device
	* is released.
	*/
	static void ipwireless_detach(struct pcmcia_device *link)
	{
	struct ipw_dev *ipw = link->priv;

	release_ipwireless(ipw);

	if (ipw->tty != NULL)
	ipwireless_tty_free(ipw->tty);
	if (ipw->network != NULL)
	ipwireless_network_free(ipw->network);
	if (ipw->hardware != NULL)
	ipwireless_hardware_free(ipw->hardware);
	kfree(ipw);
	}

	static struct pcmcia_driver me = {
	.owner = THIS_MODULE,
	.probe = ipwireless_attach,
	.remove = ipwireless_detach,
	.name = IPWIRELESS_PCCARD_NAME,
	.id_table = ipw_ids
	};

	/*
	* Module insertion : initialisation of the module.
	* Register the card with cardmgr...
	*/
	static int __init init_ipwireless(void)
	{
	int ret;

	ret = ipwireless_tty_init();
	if (ret != 0)
	return ret;

	ret = pcmcia_register_driver(&me);
	if (ret != 0)
	ipwireless_tty_release();

	return ret;
	}

	/*
	* Module removal
	*/
	static void __exit exit_ipwireless(void)
	{
	pcmcia_unregister_driver(&me);
	ipwireless_tty_release();
	}

	module_init(init_ipwireless);
	module_exit(exit_ipwireless);

	MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
	MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
	MODULE_LICENSE("GPL");