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