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 #include <pcmcia/cs.h>
  36
  37 static struct pcmcia_device_id ipw_ids[] = {
  38         PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100),
  39         PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200),
  40         PCMCIA_DEVICE_NULL
  41 };
  42 MODULE_DEVICE_TABLE(pcmcia, ipw_ids);
  43
  44 static void ipwireless_detach(struct pcmcia_device *link);
  45
  46 /*
  47  * Module params
  48  */
  49 /* Debug mode: more verbose, print sent/recv bytes */
  50 int ipwireless_debug;
  51 int ipwireless_loopback;
  52 int ipwireless_out_queue = 10;
  53
  54 module_param_named(debug, ipwireless_debug, int, 0);
  55 module_param_named(loopback, ipwireless_loopback, int, 0);
  56 module_param_named(out_queue, ipwireless_out_queue, int, 0);
  57 MODULE_PARM_DESC(debug, "switch on debug messages [0]");
  58 MODULE_PARM_DESC(loopback,
  59                 "debug: enable ras_raw channel [0]");
  60 MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");
  61
  62 /* Executes in process context. */
  63 static void signalled_reboot_work(struct work_struct *work_reboot)
  64 {
  65         struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev,
  66                         work_reboot);
  67         struct pcmcia_device *link = ipw->link;
  68         pcmcia_reset_card(link->socket);
  69 }
  70
  71 static void signalled_reboot_callback(void *callback_data)
  72 {
  73         struct ipw_dev *ipw = (struct ipw_dev *) callback_data;
  74
  75         /* Delegate to process context. */
  76         schedule_work(&ipw->work_reboot);
  77 }
  78
  79 static int ipwireless_probe(struct pcmcia_device *p_dev,
  80                             cistpl_cftable_entry_t *cfg,
  81                             cistpl_cftable_entry_t *dflt,
  82                             unsigned int vcc,
  83                             void *priv_data)
  84 {
  85         struct ipw_dev *ipw = priv_data;
  86         struct resource *io_resource;
  87         memreq_t memreq_attr_memory;
  88         memreq_t memreq_common_memory;
  89         int ret;
  90
  91         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  92         p_dev->resource[0]->start = cfg->io.win[0].base;
  93         p_dev->resource[0]->end = cfg->io.win[0].len;
  94
  95         /* 0x40 causes it to generate level mode interrupts. */
  96         /* 0x04 enables IREQ pin. */
  97         p_dev->conf.ConfigIndex = cfg->index | 0x44;
  98         p_dev->io_lines = 16;
  99         ret = pcmcia_request_io(p_dev);
 100         if (ret)
 101                 return ret;
 102
 103         io_resource = request_region(p_dev->resource[0]->start,
 104                                 resource_size(p_dev->resource[0]),
 105                                 IPWIRELESS_PCCARD_NAME);
 106
 107         if (cfg->mem.nwin == 0)
 108                 return 0;
 109
 110         ipw->request_common_memory.Attributes =
 111                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 112         ipw->request_common_memory.Base = cfg->mem.win[0].host_addr;
 113         ipw->request_common_memory.Size = cfg->mem.win[0].len;
 114         if (ipw->request_common_memory.Size < 0x1000)
 115                 ipw->request_common_memory.Size = 0x1000;
 116         ipw->request_common_memory.AccessSpeed = 0;
 117
 118         ret = pcmcia_request_window(p_dev, &ipw->request_common_memory,
 119                                 &ipw->handle_common_memory);
 120
 121         if (ret != 0)
 122                 goto exit1;
 123
 124         memreq_common_memory.CardOffset = cfg->mem.win[0].card_addr;
 125         memreq_common_memory.Page = 0;
 126
 127         ret = pcmcia_map_mem_page(p_dev, ipw->handle_common_memory,
 128                                 &memreq_common_memory);
 129
 130         if (ret != 0)
 131                 goto exit2;
 132
 133         ipw->is_v2_card = cfg->mem.win[0].len == 0x100;
 134
 135         ipw->common_memory = ioremap(ipw->request_common_memory.Base,
 136                                 ipw->request_common_memory.Size);
 137         request_mem_region(ipw->request_common_memory.Base,
 138                         ipw->request_common_memory.Size,
 139                         IPWIRELESS_PCCARD_NAME);
 140
 141         ipw->request_attr_memory.Attributes =
 142                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM | WIN_ENABLE;
 143         ipw->request_attr_memory.Base = 0;
 144         ipw->request_attr_memory.Size = 0;      /* this used to be 0x1000 */
 145         ipw->request_attr_memory.AccessSpeed = 0;
 146
 147         ret = pcmcia_request_window(p_dev, &ipw->request_attr_memory,
 148                                 &ipw->handle_attr_memory);
 149
 150         if (ret != 0)
 151                 goto exit2;
 152
 153         memreq_attr_memory.CardOffset = 0;
 154         memreq_attr_memory.Page = 0;
 155
 156         ret = pcmcia_map_mem_page(p_dev, ipw->handle_attr_memory,
 157                                 &memreq_attr_memory);
 158
 159         if (ret != 0)
 160                 goto exit3;
 161
 162         ipw->attr_memory = ioremap(ipw->request_attr_memory.Base,
 163                                 ipw->request_attr_memory.Size);
 164         request_mem_region(ipw->request_attr_memory.Base,
 165                         ipw->request_attr_memory.Size, IPWIRELESS_PCCARD_NAME);
 166
 167         return 0;
 168
 169 exit3:
 170         pcmcia_release_window(p_dev, ipw->handle_attr_memory);
 171 exit2:
 172         if (ipw->common_memory) {
 173                 release_mem_region(ipw->request_common_memory.Base,
 174                                 ipw->request_common_memory.Size);
 175                 iounmap(ipw->common_memory);
 176                 pcmcia_release_window(p_dev, ipw->handle_common_memory);
 177         } else
 178                 pcmcia_release_window(p_dev, ipw->handle_common_memory);
 179 exit1:
 180         release_resource(io_resource);
 181         pcmcia_disable_device(p_dev);
 182         return -1;
 183 }
 184
 185 static int config_ipwireless(struct ipw_dev *ipw)
 186 {
 187         struct pcmcia_device *link = ipw->link;
 188         int ret = 0;
 189
 190         ipw->is_v2_card = 0;
 191
 192         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
 193         if (ret != 0)
 194                 return ret;
 195
 196         link->conf.Attributes = CONF_ENABLE_IRQ;
 197         link->conf.IntType = INT_MEMORY_AND_IO;
 198
 199         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
 200
 201         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
 202                                     ipw->attr_memory, ipw->common_memory,
 203                                     ipw->is_v2_card, signalled_reboot_callback,
 204                                     ipw);
 205
 206         ret = pcmcia_request_irq(link, ipwireless_interrupt);
 207         if (ret != 0)
 208                 goto exit;
 209
 210         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 211                         ipw->is_v2_card ? "V2/V3" : "V1");
 212         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 213                 ": I/O ports %pR, irq %d\n", link->resource[0],
 214                         (unsigned int) link->irq);
 215         if (ipw->attr_memory && ipw->common_memory)
 216                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 217                         ": attr memory 0x%08lx-0x%08lx, common memory 0x%08lx-0x%08lx\n",
 218                         ipw->request_attr_memory.Base,
 219                         ipw->request_attr_memory.Base
 220                         + ipw->request_attr_memory.Size - 1,
 221                         ipw->request_common_memory.Base,
 222                         ipw->request_common_memory.Base
 223                         + ipw->request_common_memory.Size - 1);
 224
 225         ipw->network = ipwireless_network_create(ipw->hardware);
 226         if (!ipw->network)
 227                 goto exit;
 228
 229         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
 230         if (!ipw->tty)
 231                 goto exit;
 232
 233         ipwireless_init_hardware_v2_v3(ipw->hardware);
 234
 235         /*
 236          * Do the RequestConfiguration last, because it enables interrupts.
 237          * Then we don't get any interrupts before we're ready for them.
 238          */
 239         ret = pcmcia_request_configuration(link, &link->conf);
 240
 241         if (ret != 0)
 242                 goto exit;
 243
 244         return 0;
 245
 246 exit:
 247         if (ipw->attr_memory) {
 248                 release_mem_region(ipw->request_attr_memory.Base,
 249                                 ipw->request_attr_memory.Size);
 250                 iounmap(ipw->attr_memory);
 251                 pcmcia_release_window(link, ipw->handle_attr_memory);
 252         }
 253         if (ipw->common_memory) {
 254                 release_mem_region(ipw->request_common_memory.Base,
 255                                 ipw->request_common_memory.Size);
 256                 iounmap(ipw->common_memory);
 257                 pcmcia_release_window(link, ipw->handle_common_memory);
 258         }
 259         pcmcia_disable_device(link);
 260         return -1;
 261 }
 262
 263 static void release_ipwireless(struct ipw_dev *ipw)
 264 {
 265         if (ipw->common_memory) {
 266                 release_mem_region(ipw->request_common_memory.Base,
 267                                 ipw->request_common_memory.Size);
 268                 iounmap(ipw->common_memory);
 269         }
 270         if (ipw->attr_memory) {
 271                 release_mem_region(ipw->request_attr_memory.Base,
 272                                 ipw->request_attr_memory.Size);
 273                 iounmap(ipw->attr_memory);
 274         }
 275         if (ipw->common_memory)
 276                 pcmcia_release_window(ipw->link, ipw->handle_common_memory);
 277         if (ipw->attr_memory)
 278                 pcmcia_release_window(ipw->link, ipw->handle_attr_memory);
 279
 280         pcmcia_disable_device(ipw->link);
 281 }
 282
 283 /*
 284  * ipwireless_attach() creates an "instance" of the driver, allocating
 285  * local data structures for one device (one interface).  The device
 286  * is registered with Card Services.
 287  *
 288  * The pcmcia_device structure is initialized, but we don't actually
 289  * configure the card at this point -- we wait until we receive a
 290  * card insertion event.
 291  */
 292 static int ipwireless_attach(struct pcmcia_device *link)
 293 {
 294         struct ipw_dev *ipw;
 295         int ret;
 296
 297         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
 298         if (!ipw)
 299                 return -ENOMEM;
 300
 301         ipw->link = link;
 302         link->priv = ipw;
 303
 304         ipw->hardware = ipwireless_hardware_create();
 305         if (!ipw->hardware) {
 306                 kfree(ipw);
 307                 return -ENOMEM;
 308         }
 309         /* RegisterClient will call config_ipwireless */
 310
 311         ret = config_ipwireless(ipw);
 312
 313         if (ret != 0) {
 314                 ipwireless_detach(link);
 315                 return ret;
 316         }
 317
 318         return 0;
 319 }
 320
 321 /*
 322  * This deletes a driver "instance".  The device is de-registered with
 323  * Card Services.  If it has been released, all local data structures
 324  * are freed.  Otherwise, the structures will be freed when the device
 325  * is released.
 326  */
 327 static void ipwireless_detach(struct pcmcia_device *link)
 328 {
 329         struct ipw_dev *ipw = link->priv;
 330
 331         release_ipwireless(ipw);
 332
 333         if (ipw->tty != NULL)
 334                 ipwireless_tty_free(ipw->tty);
 335         if (ipw->network != NULL)
 336                 ipwireless_network_free(ipw->network);
 337         if (ipw->hardware != NULL)
 338                 ipwireless_hardware_free(ipw->hardware);
 339         kfree(ipw);
 340 }
 341
 342 static struct pcmcia_driver me = {
 343         .owner          = THIS_MODULE,
 344         .probe          = ipwireless_attach,
 345         .remove         = ipwireless_detach,
 346         .drv = { .name  = IPWIRELESS_PCCARD_NAME },
 347         .id_table       = ipw_ids
 348 };
 349
 350 /*
 351  * Module insertion : initialisation of the module.
 352  * Register the card with cardmgr...
 353  */
 354 static int __init init_ipwireless(void)
 355 {
 356         int ret;
 357
 358         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 359                IPWIRELESS_PCMCIA_VERSION " by " IPWIRELESS_PCMCIA_AUTHOR "\n");
 360
 361         ret = ipwireless_tty_init();
 362         if (ret != 0)
 363                 return ret;
 364
 365         ret = pcmcia_register_driver(&me);
 366         if (ret != 0)
 367                 ipwireless_tty_release();
 368
 369         return ret;
 370 }
 371
 372 /*
 373  * Module removal
 374  */
 375 static void __exit exit_ipwireless(void)
 376 {
 377         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 378                         IPWIRELESS_PCMCIA_VERSION " removed\n");
 379
 380         pcmcia_unregister_driver(&me);
 381         ipwireless_tty_release();
 382 }
 383
 384 module_init(init_ipwireless);
 385 module_exit(exit_ipwireless);
 386
 387 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 388 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 389 MODULE_LICENSE("GPL");