drivers/char/pcmcia/ipwireless/main.c

   1 /*
   2  * IPWireless 3G PCMCIA Network Driver
   3  *
   4  * Original code
   5  *   by Stephen Blackheath <stephen@blacksapphire.com>,
   6  *      Ben Martel <benm@symmetric.co.nz>
   7  *
   8  * Copyrighted as follows:
   9  *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
  10  *
  11  * Various driver changes and rewrites, port to new kernels
  12  *   Copyright (C) 2006-2007 Jiri Kosina
  13  *
  14  * Misc code cleanups and updates
  15  *   Copyright (C) 2007 David Sterba
  16  */
  17
  18 #include "hardware.h"
  19 #include "network.h"
  20 #include "main.h"
  21 #include "tty.h"
  22
  23 #include <linux/delay.h>
  24 #include <linux/init.h>
  25 #include <linux/io.h>
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/sched.h>
  29 #include <linux/slab.h>
  30
  31 #include <pcmcia/cisreg.h>
  32 #include <pcmcia/device_id.h>
  33 #include <pcmcia/ss.h>
  34 #include <pcmcia/ds.h>
  35
  36 static struct pcmcia_device_id ipw_ids[] = {
  37         PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100),
  38         PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200),
  39         PCMCIA_DEVICE_NULL
  40 };
  41 MODULE_DEVICE_TABLE(pcmcia, ipw_ids);
  42
  43 static void ipwireless_detach(struct pcmcia_device *link);
  44
  45 /*
  46  * Module params
  47  */
  48 /* Debug mode: more verbose, print sent/recv bytes */
  49 int ipwireless_debug;
  50 int ipwireless_loopback;
  51 int ipwireless_out_queue = 10;
  52
  53 module_param_named(debug, ipwireless_debug, int, 0);
  54 module_param_named(loopback, ipwireless_loopback, int, 0);
  55 module_param_named(out_queue, ipwireless_out_queue, int, 0);
  56 MODULE_PARM_DESC(debug, "switch on debug messages [0]");
  57 MODULE_PARM_DESC(loopback,
  58                 "debug: enable ras_raw channel [0]");
  59 MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");
  60
  61 /* Executes in process context. */
  62 static void signalled_reboot_work(struct work_struct *work_reboot)
  63 {
  64         struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev,
  65                         work_reboot);
  66         struct pcmcia_device *link = ipw->link;
  67         pcmcia_reset_card(link->socket);
  68 }
  69
  70 static void signalled_reboot_callback(void *callback_data)
  71 {
  72         struct ipw_dev *ipw = (struct ipw_dev *) callback_data;
  73
  74         /* Delegate to process context. */
  75         schedule_work(&ipw->work_reboot);
  76 }
  77
  78 static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
  79 {
  80         struct ipw_dev *ipw = priv_data;
  81         struct resource *io_resource;
  82         int ret;
  83
  84         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
  85         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  86
  87         /* 0x40 causes it to generate level mode interrupts. */
  88         /* 0x04 enables IREQ pin. */
  89         p_dev->config_index |= 0x44;
  90         p_dev->io_lines = 16;
  91         ret = pcmcia_request_io(p_dev);
  92         if (ret)
  93                 return ret;
  94
  95         io_resource = request_region(p_dev->resource[0]->start,
  96                                 resource_size(p_dev->resource[0]),
  97                                 IPWIRELESS_PCCARD_NAME);
  98
  99         p_dev->resource[2]->flags |=
 100                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 101
 102         ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
 103         if (ret != 0)
 104                 goto exit1;
 105
 106         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
 107         if (ret != 0)
 108                 goto exit2;
 109
 110         ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;
 111
 112         ipw->attr_memory = ioremap(p_dev->resource[2]->start,
 113                                 resource_size(p_dev->resource[2]));
 114         request_mem_region(p_dev->resource[2]->start,
 115                         resource_size(p_dev->resource[2]),
 116                         IPWIRELESS_PCCARD_NAME);
 117
 118         p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
 119                                         WIN_ENABLE;
 120         p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
 121         ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
 122         if (ret != 0)
 123                 goto exit2;
 124
 125         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
 126         if (ret != 0)
 127                 goto exit3;
 128
 129         ipw->attr_memory = ioremap(p_dev->resource[3]->start,
 130                                 resource_size(p_dev->resource[3]));
 131         request_mem_region(p_dev->resource[3]->start,
 132                         resource_size(p_dev->resource[3]),
 133                         IPWIRELESS_PCCARD_NAME);
 134
 135         return 0;
 136
 137 exit3:
 138 exit2:
 139         if (ipw->common_memory) {
 140                 release_mem_region(p_dev->resource[2]->start,
 141                                 resource_size(p_dev->resource[2]));
 142                 iounmap(ipw->common_memory);
 143         }
 144 exit1:
 145         release_resource(io_resource);
 146         pcmcia_disable_device(p_dev);
 147         return -1;
 148 }
 149
 150 static int config_ipwireless(struct ipw_dev *ipw)
 151 {
 152         struct pcmcia_device *link = ipw->link;
 153         int ret = 0;
 154
 155         ipw->is_v2_card = 0;
 156         link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
 157                 CONF_ENABLE_IRQ;
 158
 159         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
 160         if (ret != 0)
 161                 return ret;
 162
 163         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
 164
 165         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
 166                                     ipw->attr_memory, ipw->common_memory,
 167                                     ipw->is_v2_card, signalled_reboot_callback,
 168                                     ipw);
 169
 170         ret = pcmcia_request_irq(link, ipwireless_interrupt);
 171         if (ret != 0)
 172                 goto exit;
 173
 174         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 175                         ipw->is_v2_card ? "V2/V3" : "V1");
 176         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 177                 ": I/O ports %pR, irq %d\n", link->resource[0],
 178                         (unsigned int) link->irq);
 179         if (ipw->attr_memory && ipw->common_memory)
 180                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 181                         ": attr memory %pR, common memory %pR\n",
 182                         link->resource[3],
 183                         link->resource[2]);
 184
 185         ipw->network = ipwireless_network_create(ipw->hardware);
 186         if (!ipw->network)
 187                 goto exit;
 188
 189         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
 190         if (!ipw->tty)
 191                 goto exit;
 192
 193         ipwireless_init_hardware_v2_v3(ipw->hardware);
 194
 195         /*
 196          * Do the RequestConfiguration last, because it enables interrupts.
 197          * Then we don't get any interrupts before we're ready for them.
 198          */
 199         ret = pcmcia_enable_device(link);
 200         if (ret != 0)
 201                 goto exit;
 202
 203         return 0;
 204
 205 exit:
 206         if (ipw->common_memory) {
 207                 release_mem_region(link->resource[2]->start,
 208                                 resource_size(link->resource[2]));
 209                 iounmap(ipw->common_memory);
 210         }
 211         if (ipw->attr_memory) {
 212                 release_mem_region(link->resource[3]->start,
 213                                 resource_size(link->resource[3]));
 214                 iounmap(ipw->attr_memory);
 215         }
 216         pcmcia_disable_device(link);
 217         return -1;
 218 }
 219
 220 static void release_ipwireless(struct ipw_dev *ipw)
 221 {
 222         if (ipw->common_memory) {
 223                 release_mem_region(ipw->link->resource[2]->start,
 224                                 resource_size(ipw->link->resource[2]));
 225                 iounmap(ipw->common_memory);
 226         }
 227         if (ipw->attr_memory) {
 228                 release_mem_region(ipw->link->resource[3]->start,
 229                                 resource_size(ipw->link->resource[3]));
 230                 iounmap(ipw->attr_memory);
 231         }
 232         pcmcia_disable_device(ipw->link);
 233 }
 234
 235 /*
 236  * ipwireless_attach() creates an "instance" of the driver, allocating
 237  * local data structures for one device (one interface).  The device
 238  * is registered with Card Services.
 239  *
 240  * The pcmcia_device structure is initialized, but we don't actually
 241  * configure the card at this point -- we wait until we receive a
 242  * card insertion event.
 243  */
 244 static int ipwireless_attach(struct pcmcia_device *link)
 245 {
 246         struct ipw_dev *ipw;
 247         int ret;
 248
 249         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
 250         if (!ipw)
 251                 return -ENOMEM;
 252
 253         ipw->link = link;
 254         link->priv = ipw;
 255
 256         ipw->hardware = ipwireless_hardware_create();
 257         if (!ipw->hardware) {
 258                 kfree(ipw);
 259                 return -ENOMEM;
 260         }
 261         /* RegisterClient will call config_ipwireless */
 262
 263         ret = config_ipwireless(ipw);
 264
 265         if (ret != 0) {
 266                 ipwireless_detach(link);
 267                 return ret;
 268         }
 269
 270         return 0;
 271 }
 272
 273 /*
 274  * This deletes a driver "instance".  The device is de-registered with
 275  * Card Services.  If it has been released, all local data structures
 276  * are freed.  Otherwise, the structures will be freed when the device
 277  * is released.
 278  */
 279 static void ipwireless_detach(struct pcmcia_device *link)
 280 {
 281         struct ipw_dev *ipw = link->priv;
 282
 283         release_ipwireless(ipw);
 284
 285         if (ipw->tty != NULL)
 286                 ipwireless_tty_free(ipw->tty);
 287         if (ipw->network != NULL)
 288                 ipwireless_network_free(ipw->network);
 289         if (ipw->hardware != NULL)
 290                 ipwireless_hardware_free(ipw->hardware);
 291         kfree(ipw);
 292 }
 293
 294 static struct pcmcia_driver me = {
 295         .owner          = THIS_MODULE,
 296         .probe          = ipwireless_attach,
 297         .remove         = ipwireless_detach,
 298         .name           = IPWIRELESS_PCCARD_NAME,
 299         .id_table       = ipw_ids
 300 };
 301
 302 /*
 303  * Module insertion : initialisation of the module.
 304  * Register the card with cardmgr...
 305  */
 306 static int __init init_ipwireless(void)
 307 {
 308         int ret;
 309
 310         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 311                IPWIRELESS_PCMCIA_VERSION " by " IPWIRELESS_PCMCIA_AUTHOR "\n");
 312
 313         ret = ipwireless_tty_init();
 314         if (ret != 0)
 315                 return ret;
 316
 317         ret = pcmcia_register_driver(&me);
 318         if (ret != 0)
 319                 ipwireless_tty_release();
 320
 321         return ret;
 322 }
 323
 324 /*
 325  * Module removal
 326  */
 327 static void __exit exit_ipwireless(void)
 328 {
 329         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 330                         IPWIRELESS_PCMCIA_VERSION " removed\n");
 331
 332         pcmcia_unregister_driver(&me);
 333         ipwireless_tty_release();
 334 }
 335
 336 module_init(init_ipwireless);
 337 module_exit(exit_ipwireless);
 338
 339 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 340 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 341 MODULE_LICENSE("GPL");