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   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         int ret = pcmcia_reset_card(link->socket);
  69
  70         if (ret != 0)
  71                 cs_error(link, ResetCard, ret);
  72 }
  73
  74 static void signalled_reboot_callback(void *callback_data)
  75 {
  76         struct ipw_dev *ipw = (struct ipw_dev *) callback_data;
  77
  78         /* Delegate to process context. */
  79         schedule_work(&ipw->work_reboot);
  80 }
  81
  82 static int ipwireless_ioprobe(struct pcmcia_device *p_dev,
  83                               cistpl_cftable_entry_t *cfg,
  84                               cistpl_cftable_entry_t *dflt,
  85                               unsigned int vcc,
  86                               void *priv_data)
  87 {
  88         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
  89         p_dev->io.BasePort1 = cfg->io.win[0].base;
  90         p_dev->io.NumPorts1 = cfg->io.win[0].len;
  91         p_dev->io.IOAddrLines = 16;
  92
  93         p_dev->irq.IRQInfo1 = cfg->irq.IRQInfo1;
  94
  95         /* 0x40 causes it to generate level mode interrupts. */
  96         /* 0x04 enables IREQ pin. */
  97         p_dev->conf.ConfigIndex = cfg->index | 0x44;
  98         return pcmcia_request_io(p_dev, &p_dev->io);
  99 }
 100
 101 static int config_ipwireless(struct ipw_dev *ipw)
 102 {
 103         struct pcmcia_device *link = ipw->link;
 104         int ret = 0;
 105         tuple_t tuple;
 106         unsigned short buf[64];
 107         cisparse_t parse;
 108         memreq_t memreq_attr_memory;
 109         memreq_t memreq_common_memory;
 110
 111         ipw->is_v2_card = 0;
 112
 113         tuple.Attributes = 0;
 114         tuple.TupleData = (cisdata_t *) buf;
 115         tuple.TupleDataMax = sizeof(buf);
 116         tuple.TupleOffset = 0;
 117
 118         ret = pcmcia_loop_config(link, ipwireless_ioprobe, NULL);
 119         if (ret != 0) {
 120                 cs_error(link, RequestIO, ret);
 121                 goto exit0;
 122         }
 123
 124         link->conf.Attributes = CONF_ENABLE_IRQ;
 125         link->conf.IntType = INT_MEMORY_AND_IO;
 126
 127         link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT;
 128         link->irq.Handler = ipwireless_interrupt;
 129         link->irq.Instance = ipw->hardware;
 130
 131         request_region(link->io.BasePort1, link->io.NumPorts1,
 132                         IPWIRELESS_PCCARD_NAME);
 133
 134         /* memory settings */
 135         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 136
 137         ret = pcmcia_get_first_tuple(link, &tuple);
 138         if (ret != 0) {
 139                 cs_error(link, GetFirstTuple, ret);
 140                 goto exit1;
 141         }
 142
 143         ret = pcmcia_get_tuple_data(link, &tuple);
 144
 145         if (ret != 0) {
 146                 cs_error(link, GetTupleData, ret);
 147                 goto exit1;
 148         }
 149
 150         ret = pcmcia_parse_tuple(&tuple, &parse);
 151
 152         if (ret != 0) {
 153                 cs_error(link, ParseTuple, ret);
 154                 goto exit1;
 155         }
 156
 157         if (parse.cftable_entry.mem.nwin > 0) {
 158                 ipw->request_common_memory.Attributes =
 159                         WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 160                 ipw->request_common_memory.Base =
 161                         parse.cftable_entry.mem.win[0].host_addr;
 162                 ipw->request_common_memory.Size = parse.cftable_entry.mem.win[0].len;
 163                 if (ipw->request_common_memory.Size < 0x1000)
 164                         ipw->request_common_memory.Size = 0x1000;
 165                 ipw->request_common_memory.AccessSpeed = 0;
 166
 167                 ret = pcmcia_request_window(&link, &ipw->request_common_memory,
 168                                 &ipw->handle_common_memory);
 169
 170                 if (ret != 0) {
 171                         cs_error(link, RequestWindow, ret);
 172                         goto exit1;
 173                 }
 174
 175                 memreq_common_memory.CardOffset =
 176                         parse.cftable_entry.mem.win[0].card_addr;
 177                 memreq_common_memory.Page = 0;
 178
 179                 ret = pcmcia_map_mem_page(ipw->handle_common_memory,
 180                                 &memreq_common_memory);
 181
 182                 if (ret != 0) {
 183                         cs_error(link, MapMemPage, ret);
 184                         goto exit1;
 185                 }
 186
 187                 ipw->is_v2_card =
 188                         parse.cftable_entry.mem.win[0].len == 0x100;
 189
 190                 ipw->common_memory = ioremap(ipw->request_common_memory.Base,
 191                                 ipw->request_common_memory.Size);
 192                 request_mem_region(ipw->request_common_memory.Base,
 193                                 ipw->request_common_memory.Size, IPWIRELESS_PCCARD_NAME);
 194
 195                 ipw->request_attr_memory.Attributes =
 196                         WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM | WIN_ENABLE;
 197                 ipw->request_attr_memory.Base = 0;
 198                 ipw->request_attr_memory.Size = 0;      /* this used to be 0x1000 */
 199                 ipw->request_attr_memory.AccessSpeed = 0;
 200
 201                 ret = pcmcia_request_window(&link, &ipw->request_attr_memory,
 202                                 &ipw->handle_attr_memory);
 203
 204                 if (ret != 0) {
 205                         cs_error(link, RequestWindow, ret);
 206                         goto exit2;
 207                 }
 208
 209                 memreq_attr_memory.CardOffset = 0;
 210                 memreq_attr_memory.Page = 0;
 211
 212                 ret = pcmcia_map_mem_page(ipw->handle_attr_memory,
 213                                 &memreq_attr_memory);
 214
 215                 if (ret != 0) {
 216                         cs_error(link, MapMemPage, ret);
 217                         goto exit2;
 218                 }
 219
 220                 ipw->attr_memory = ioremap(ipw->request_attr_memory.Base,
 221                                 ipw->request_attr_memory.Size);
 222                 request_mem_region(ipw->request_attr_memory.Base, ipw->request_attr_memory.Size,
 223                                 IPWIRELESS_PCCARD_NAME);
 224         }
 225
 226         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
 227
 228         ipwireless_init_hardware_v1(ipw->hardware, link->io.BasePort1,
 229                                     ipw->attr_memory, ipw->common_memory,
 230                                     ipw->is_v2_card, signalled_reboot_callback,
 231                                     ipw);
 232
 233         ret = pcmcia_request_irq(link, &link->irq);
 234
 235         if (ret != 0) {
 236                 cs_error(link, RequestIRQ, ret);
 237                 goto exit3;
 238         }
 239
 240         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 241                         ipw->is_v2_card ? "V2/V3" : "V1");
 242         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 243                         ": I/O ports 0x%04x-0x%04x, irq %d\n",
 244                         (unsigned int) link->io.BasePort1,
 245                         (unsigned int) (link->io.BasePort1 +
 246                                 link->io.NumPorts1 - 1),
 247                         (unsigned int) link->irq.AssignedIRQ);
 248         if (ipw->attr_memory && ipw->common_memory)
 249                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 250                         ": attr memory 0x%08lx-0x%08lx, common memory 0x%08lx-0x%08lx\n",
 251                         ipw->request_attr_memory.Base,
 252                         ipw->request_attr_memory.Base
 253                         + ipw->request_attr_memory.Size - 1,
 254                         ipw->request_common_memory.Base,
 255                         ipw->request_common_memory.Base
 256                         + ipw->request_common_memory.Size - 1);
 257
 258         ipw->network = ipwireless_network_create(ipw->hardware);
 259         if (!ipw->network)
 260                 goto exit3;
 261
 262         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network,
 263                         ipw->nodes);
 264         if (!ipw->tty)
 265                 goto exit3;
 266
 267         ipwireless_init_hardware_v2_v3(ipw->hardware);
 268
 269         /*
 270          * Do the RequestConfiguration last, because it enables interrupts.
 271          * Then we don't get any interrupts before we're ready for them.
 272          */
 273         ret = pcmcia_request_configuration(link, &link->conf);
 274
 275         if (ret != 0) {
 276                 cs_error(link, RequestConfiguration, ret);
 277                 goto exit4;
 278         }
 279
 280         link->dev_node = &ipw->nodes[0];
 281
 282         return 0;
 283
 284 exit4:
 285         pcmcia_disable_device(link);
 286 exit3:
 287         if (ipw->attr_memory) {
 288                 release_mem_region(ipw->request_attr_memory.Base,
 289                                 ipw->request_attr_memory.Size);
 290                 iounmap(ipw->attr_memory);
 291                 pcmcia_release_window(ipw->handle_attr_memory);
 292                 pcmcia_disable_device(link);
 293         }
 294 exit2:
 295         if (ipw->common_memory) {
 296                 release_mem_region(ipw->request_common_memory.Base,
 297                                 ipw->request_common_memory.Size);
 298                 iounmap(ipw->common_memory);
 299                 pcmcia_release_window(ipw->handle_common_memory);
 300         }
 301 exit1:
 302         pcmcia_disable_device(link);
 303 exit0:
 304         return -1;
 305 }
 306
 307 static void release_ipwireless(struct ipw_dev *ipw)
 308 {
 309         pcmcia_disable_device(ipw->link);
 310
 311         if (ipw->common_memory) {
 312                 release_mem_region(ipw->request_common_memory.Base,
 313                                 ipw->request_common_memory.Size);
 314                 iounmap(ipw->common_memory);
 315         }
 316         if (ipw->attr_memory) {
 317                 release_mem_region(ipw->request_attr_memory.Base,
 318                                 ipw->request_attr_memory.Size);
 319                 iounmap(ipw->attr_memory);
 320         }
 321         if (ipw->common_memory)
 322                 pcmcia_release_window(ipw->handle_common_memory);
 323         if (ipw->attr_memory)
 324                 pcmcia_release_window(ipw->handle_attr_memory);
 325
 326         /* Break the link with Card Services */
 327         pcmcia_disable_device(ipw->link);
 328 }
 329
 330 /*
 331  * ipwireless_attach() creates an "instance" of the driver, allocating
 332  * local data structures for one device (one interface).  The device
 333  * is registered with Card Services.
 334  *
 335  * The pcmcia_device structure is initialized, but we don't actually
 336  * configure the card at this point -- we wait until we receive a
 337  * card insertion event.
 338  */
 339 static int ipwireless_attach(struct pcmcia_device *link)
 340 {
 341         struct ipw_dev *ipw;
 342         int ret;
 343
 344         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
 345         if (!ipw)
 346                 return -ENOMEM;
 347
 348         ipw->link = link;
 349         link->priv = ipw;
 350         link->irq.Instance = ipw;
 351
 352         /* Link this device into our device list. */
 353         link->dev_node = &ipw->nodes[0];
 354
 355         ipw->hardware = ipwireless_hardware_create();
 356         if (!ipw->hardware) {
 357                 kfree(ipw);
 358                 return -ENOMEM;
 359         }
 360         /* RegisterClient will call config_ipwireless */
 361
 362         ret = config_ipwireless(ipw);
 363
 364         if (ret != 0) {
 365                 cs_error(link, RegisterClient, ret);
 366                 ipwireless_detach(link);
 367                 return ret;
 368         }
 369
 370         return 0;
 371 }
 372
 373 /*
 374  * This deletes a driver "instance".  The device is de-registered with
 375  * Card Services.  If it has been released, all local data structures
 376  * are freed.  Otherwise, the structures will be freed when the device
 377  * is released.
 378  */
 379 static void ipwireless_detach(struct pcmcia_device *link)
 380 {
 381         struct ipw_dev *ipw = link->priv;
 382
 383         release_ipwireless(ipw);
 384
 385         if (ipw->tty != NULL)
 386                 ipwireless_tty_free(ipw->tty);
 387         if (ipw->network != NULL)
 388                 ipwireless_network_free(ipw->network);
 389         if (ipw->hardware != NULL)
 390                 ipwireless_hardware_free(ipw->hardware);
 391         kfree(ipw);
 392 }
 393
 394 static struct pcmcia_driver me = {
 395         .owner          = THIS_MODULE,
 396         .probe          = ipwireless_attach,
 397         .remove         = ipwireless_detach,
 398         .drv = { .name  = IPWIRELESS_PCCARD_NAME },
 399         .id_table       = ipw_ids
 400 };
 401
 402 /*
 403  * Module insertion : initialisation of the module.
 404  * Register the card with cardmgr...
 405  */
 406 static int __init init_ipwireless(void)
 407 {
 408         int ret;
 409
 410         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 411                IPWIRELESS_PCMCIA_VERSION " by " IPWIRELESS_PCMCIA_AUTHOR "\n");
 412
 413         ret = ipwireless_tty_init();
 414         if (ret != 0)
 415                 return ret;
 416
 417         ret = pcmcia_register_driver(&me);
 418         if (ret != 0)
 419                 ipwireless_tty_release();
 420
 421         return ret;
 422 }
 423
 424 /*
 425  * Module removal
 426  */
 427 static void __exit exit_ipwireless(void)
 428 {
 429         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 430                         IPWIRELESS_PCMCIA_VERSION " removed\n");
 431
 432         pcmcia_unregister_driver(&me);
 433         ipwireless_tty_release();
 434 }
 435
 436 module_init(init_ipwireless);
 437 module_exit(exit_ipwireless);
 438
 439 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 440 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 441 MODULE_LICENSE("GPL");