/*
   * 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
  ",
  			ipw->is_v2_card ? "V2/V3" : "V1");
  	printk(KERN_INFO IPWIRELESS_PCCARD_NAME
  		": I/O ports %pR, irq %d
  ", 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
  ",
  			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");