drivers/tty/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 const 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         int ret;
  82
  83         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
  84         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  85
  86         /* 0x40 causes it to generate level mode interrupts. */
  87         /* 0x04 enables IREQ pin. */
  88         p_dev->config_index |= 0x44;
  89         p_dev->io_lines = 16;
  90         ret = pcmcia_request_io(p_dev);
  91         if (ret)
  92                 return ret;
  93
  94         if (!request_region(p_dev->resource[0]->start,
  95                             resource_size(p_dev->resource[0]),
  96                             IPWIRELESS_PCCARD_NAME)) {
  97                 ret = -EBUSY;
  98                 goto exit;
  99         }
 100
 101         p_dev->resource[2]->flags |=
 102                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 103
 104         ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
 105         if (ret != 0)
 106                 goto exit1;
 107
 108         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
 109         if (ret != 0)
 110                 goto exit1;
 111
 112         ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;
 113
 114         ipw->common_memory = ioremap(p_dev->resource[2]->start,
 115                                 resource_size(p_dev->resource[2]));
 116         if (!ipw->common_memory) {
 117                 ret = -ENOMEM;
 118                 goto exit1;
 119         }
 120         if (!request_mem_region(p_dev->resource[2]->start,
 121                                 resource_size(p_dev->resource[2]),
 122                                 IPWIRELESS_PCCARD_NAME)) {
 123                 ret = -EBUSY;
 124                 goto exit2;
 125         }
 126
 127         p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
 128                                         WIN_ENABLE;
 129         p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
 130         ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
 131         if (ret != 0)
 132                 goto exit3;
 133
 134         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
 135         if (ret != 0)
 136                 goto exit3;
 137
 138         ipw->attr_memory = ioremap(p_dev->resource[3]->start,
 139                                 resource_size(p_dev->resource[3]));
 140         if (!ipw->attr_memory) {
 141                 ret = -ENOMEM;
 142                 goto exit3;
 143         }
 144         if (!request_mem_region(p_dev->resource[3]->start,
 145                                 resource_size(p_dev->resource[3]),
 146                                 IPWIRELESS_PCCARD_NAME)) {
 147                 ret = -EBUSY;
 148                 goto exit4;
 149         }
 150
 151         return 0;
 152
 153 exit4:
 154         iounmap(ipw->attr_memory);
 155 exit3:
 156         release_mem_region(p_dev->resource[2]->start,
 157                         resource_size(p_dev->resource[2]));
 158 exit2:
 159         iounmap(ipw->common_memory);
 160 exit1:
 161         release_region(p_dev->resource[0]->start,
 162                        resource_size(p_dev->resource[0]));
 163 exit:
 164         pcmcia_disable_device(p_dev);
 165         return ret;
 166 }
 167
 168 static int config_ipwireless(struct ipw_dev *ipw)
 169 {
 170         struct pcmcia_device *link = ipw->link;
 171         int ret = 0;
 172
 173         ipw->is_v2_card = 0;
 174         link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
 175                 CONF_ENABLE_IRQ;
 176
 177         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
 178         if (ret != 0)
 179                 return ret;
 180
 181         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
 182
 183         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
 184                                     ipw->attr_memory, ipw->common_memory,
 185                                     ipw->is_v2_card, signalled_reboot_callback,
 186                                     ipw);
 187
 188         ret = pcmcia_request_irq(link, ipwireless_interrupt);
 189         if (ret != 0)
 190                 goto exit;
 191
 192         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 193                         ipw->is_v2_card ? "V2/V3" : "V1");
 194         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 195                 ": I/O ports %pR, irq %d\n", link->resource[0],
 196                         (unsigned int) link->irq);
 197         if (ipw->attr_memory && ipw->common_memory)
 198                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 199                         ": attr memory %pR, common memory %pR\n",
 200                         link->resource[3],
 201                         link->resource[2]);
 202
 203         ipw->network = ipwireless_network_create(ipw->hardware);
 204         if (!ipw->network)
 205                 goto exit;
 206
 207         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
 208         if (!ipw->tty)
 209                 goto exit;
 210
 211         ipwireless_init_hardware_v2_v3(ipw->hardware);
 212
 213         /*
 214          * Do the RequestConfiguration last, because it enables interrupts.
 215          * Then we don't get any interrupts before we're ready for them.
 216          */
 217         ret = pcmcia_enable_device(link);
 218         if (ret != 0)
 219                 goto exit;
 220
 221         return 0;
 222
 223 exit:
 224         if (ipw->common_memory) {
 225                 release_mem_region(link->resource[2]->start,
 226                                 resource_size(link->resource[2]));
 227                 iounmap(ipw->common_memory);
 228         }
 229         if (ipw->attr_memory) {
 230                 release_mem_region(link->resource[3]->start,
 231                                 resource_size(link->resource[3]));
 232                 iounmap(ipw->attr_memory);
 233         }
 234         pcmcia_disable_device(link);
 235         return -1;
 236 }
 237
 238 static void release_ipwireless(struct ipw_dev *ipw)
 239 {
 240         release_region(ipw->link->resource[0]->start,
 241                        resource_size(ipw->link->resource[0]));
 242         if (ipw->common_memory) {
 243                 release_mem_region(ipw->link->resource[2]->start,
 244                                 resource_size(ipw->link->resource[2]));
 245                 iounmap(ipw->common_memory);
 246         }
 247         if (ipw->attr_memory) {
 248                 release_mem_region(ipw->link->resource[3]->start,
 249                                 resource_size(ipw->link->resource[3]));
 250                 iounmap(ipw->attr_memory);
 251         }
 252         pcmcia_disable_device(ipw->link);
 253 }
 254
 255 /*
 256  * ipwireless_attach() creates an "instance" of the driver, allocating
 257  * local data structures for one device (one interface).  The device
 258  * is registered with Card Services.
 259  *
 260  * The pcmcia_device structure is initialized, but we don't actually
 261  * configure the card at this point -- we wait until we receive a
 262  * card insertion event.
 263  */
 264 static int ipwireless_attach(struct pcmcia_device *link)
 265 {
 266         struct ipw_dev *ipw;
 267         int ret;
 268
 269         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
 270         if (!ipw)
 271                 return -ENOMEM;
 272
 273         ipw->link = link;
 274         link->priv = ipw;
 275
 276         ipw->hardware = ipwireless_hardware_create();
 277         if (!ipw->hardware) {
 278                 kfree(ipw);
 279                 return -ENOMEM;
 280         }
 281         /* RegisterClient will call config_ipwireless */
 282
 283         ret = config_ipwireless(ipw);
 284
 285         if (ret != 0) {
 286                 ipwireless_detach(link);
 287                 return ret;
 288         }
 289
 290         return 0;
 291 }
 292
 293 /*
 294  * This deletes a driver "instance".  The device is de-registered with
 295  * Card Services.  If it has been released, all local data structures
 296  * are freed.  Otherwise, the structures will be freed when the device
 297  * is released.
 298  */
 299 static void ipwireless_detach(struct pcmcia_device *link)
 300 {
 301         struct ipw_dev *ipw = link->priv;
 302
 303         release_ipwireless(ipw);
 304
 305         if (ipw->tty != NULL)
 306                 ipwireless_tty_free(ipw->tty);
 307         if (ipw->network != NULL)
 308                 ipwireless_network_free(ipw->network);
 309         if (ipw->hardware != NULL)
 310                 ipwireless_hardware_free(ipw->hardware);
 311         kfree(ipw);
 312 }
 313
 314 static struct pcmcia_driver me = {
 315         .owner          = THIS_MODULE,
 316         .probe          = ipwireless_attach,
 317         .remove         = ipwireless_detach,
 318         .name           = IPWIRELESS_PCCARD_NAME,
 319         .id_table       = ipw_ids
 320 };
 321
 322 /*
 323  * Module insertion : initialisation of the module.
 324  * Register the card with cardmgr...
 325  */
 326 static int __init init_ipwireless(void)
 327 {
 328         int ret;
 329
 330         ret = ipwireless_tty_init();
 331         if (ret != 0)
 332                 return ret;
 333
 334         ret = pcmcia_register_driver(&me);
 335         if (ret != 0)
 336                 ipwireless_tty_release();
 337
 338         return ret;
 339 }
 340
 341 /*
 342  * Module removal
 343  */
 344 static void __exit exit_ipwireless(void)
 345 {
 346         pcmcia_unregister_driver(&me);
 347         ipwireless_tty_release();
 348 }
 349
 350 module_init(init_ipwireless);
 351 module_exit(exit_ipwireless);
 352
 353 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 354 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 355 MODULE_LICENSE("GPL");