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