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
  36 static 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,
  79                             cistpl_cftable_entry_t *cfg,
  80                             cistpl_cftable_entry_t *dflt,
  81                             void *priv_data)
  82 {
  83         struct ipw_dev *ipw = priv_data;
  84         struct resource *io_resource;
  85         int ret;
  86
  87         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  88         p_dev->resource[0]->start = cfg->io.win[0].base;
  89         p_dev->resource[0]->end = cfg->io.win[0].len;
  90
  91         /* 0x40 causes it to generate level mode interrupts. */
  92         /* 0x04 enables IREQ pin. */
  93         p_dev->config_index = cfg->index | 0x44;
  94         p_dev->io_lines = 16;
  95         ret = pcmcia_request_io(p_dev);
  96         if (ret)
  97                 return ret;
  98
  99         io_resource = request_region(p_dev->resource[0]->start,
 100                                 resource_size(p_dev->resource[0]),
 101                                 IPWIRELESS_PCCARD_NAME);
 102
 103         if (cfg->mem.nwin == 0)
 104                 return 0;
 105
 106         p_dev->resource[2]->flags |=
 107                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 108         p_dev->resource[2]->start = cfg->mem.win[0].host_addr;
 109         p_dev->resource[2]->end = cfg->mem.win[0].len;
 110         if (p_dev->resource[2]->end < 0x1000)
 111                 p_dev->resource[2]->end = 0x1000;
 112
 113         ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
 114         if (ret != 0)
 115                 goto exit1;
 116
 117         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2],
 118                                 cfg->mem.win[0].card_addr);
 119         if (ret != 0)
 120                 goto exit2;
 121
 122         ipw->is_v2_card = cfg->mem.win[0].len == 0x100;
 123
 124         ipw->attr_memory = ioremap(p_dev->resource[2]->start,
 125                                 resource_size(p_dev->resource[2]));
 126         request_mem_region(p_dev->resource[2]->start,
 127                         resource_size(p_dev->resource[2]),
 128                         IPWIRELESS_PCCARD_NAME);
 129
 130         p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
 131                                         WIN_ENABLE;
 132         p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
 133         ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
 134         if (ret != 0)
 135                 goto exit2;
 136
 137         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
 138         if (ret != 0)
 139                 goto exit3;
 140
 141         ipw->attr_memory = ioremap(p_dev->resource[3]->start,
 142                                 resource_size(p_dev->resource[3]));
 143         request_mem_region(p_dev->resource[3]->start,
 144                         resource_size(p_dev->resource[3]),
 145                         IPWIRELESS_PCCARD_NAME);
 146
 147         return 0;
 148
 149 exit3:
 150 exit2:
 151         if (ipw->common_memory) {
 152                 release_mem_region(p_dev->resource[2]->start,
 153                                 resource_size(p_dev->resource[2]));
 154                 iounmap(ipw->common_memory);
 155         }
 156 exit1:
 157         release_resource(io_resource);
 158         pcmcia_disable_device(p_dev);
 159         return -1;
 160 }
 161
 162 static int config_ipwireless(struct ipw_dev *ipw)
 163 {
 164         struct pcmcia_device *link = ipw->link;
 165         int ret = 0;
 166
 167         ipw->is_v2_card = 0;
 168
 169         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
 170         if (ret != 0)
 171                 return ret;
 172
 173         link->config_flags |= CONF_ENABLE_IRQ;
 174
 175         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
 176
 177         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
 178                                     ipw->attr_memory, ipw->common_memory,
 179                                     ipw->is_v2_card, signalled_reboot_callback,
 180                                     ipw);
 181
 182         ret = pcmcia_request_irq(link, ipwireless_interrupt);
 183         if (ret != 0)
 184                 goto exit;
 185
 186         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 187                         ipw->is_v2_card ? "V2/V3" : "V1");
 188         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 189                 ": I/O ports %pR, irq %d\n", link->resource[0],
 190                         (unsigned int) link->irq);
 191         if (ipw->attr_memory && ipw->common_memory)
 192                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 193                         ": attr memory %pR, common memory %pR\n",
 194                         link->resource[3],
 195                         link->resource[2]);
 196
 197         ipw->network = ipwireless_network_create(ipw->hardware);
 198         if (!ipw->network)
 199                 goto exit;
 200
 201         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
 202         if (!ipw->tty)
 203                 goto exit;
 204
 205         ipwireless_init_hardware_v2_v3(ipw->hardware);
 206
 207         /*
 208          * Do the RequestConfiguration last, because it enables interrupts.
 209          * Then we don't get any interrupts before we're ready for them.
 210          */
 211         ret = pcmcia_enable_device(link);
 212         if (ret != 0)
 213                 goto exit;
 214
 215         return 0;
 216
 217 exit:
 218         if (ipw->common_memory) {
 219                 release_mem_region(link->resource[2]->start,
 220                                 resource_size(link->resource[2]));
 221                 iounmap(ipw->common_memory);
 222         }
 223         if (ipw->attr_memory) {
 224                 release_mem_region(link->resource[3]->start,
 225                                 resource_size(link->resource[3]));
 226                 iounmap(ipw->attr_memory);
 227         }
 228         pcmcia_disable_device(link);
 229         return -1;
 230 }
 231
 232 static void release_ipwireless(struct ipw_dev *ipw)
 233 {
 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         .drv = { .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         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 323                IPWIRELESS_PCMCIA_VERSION " by " IPWIRELESS_PCMCIA_AUTHOR "\n");
 324
 325         ret = ipwireless_tty_init();
 326         if (ret != 0)
 327                 return ret;
 328
 329         ret = pcmcia_register_driver(&me);
 330         if (ret != 0)
 331                 ipwireless_tty_release();
 332
 333         return ret;
 334 }
 335
 336 /*
 337  * Module removal
 338  */
 339 static void __exit exit_ipwireless(void)
 340 {
 341         printk(KERN_INFO IPWIRELESS_PCCARD_NAME " "
 342                         IPWIRELESS_PCMCIA_VERSION " removed\n");
 343
 344         pcmcia_unregister_driver(&me);
 345         ipwireless_tty_release();
 346 }
 347
 348 module_init(init_ipwireless);
 349 module_exit(exit_ipwireless);
 350
 351 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 352 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 353 MODULE_LICENSE("GPL");