drivers/tty/ipwireless/main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * IPWireless 3G PCMCIA Network Driver
   4  *
   5  * Original code
   6  *   by Stephen Blackheath <[email protected]>,
   7  *      Ben Martel <[email protected]>
   8  *
   9  * Copyrighted as follows:
  10  *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
  11  *
  12  * Various driver changes and rewrites, port to new kernels
  13  *   Copyright (C) 2006-2007 Jiri Kosina
  14  *
  15  * Misc code cleanups and updates
  16  *   Copyright (C) 2007 David Sterba
  17  */
  18
  19 #include "hardware.h"
  20 #include "network.h"
  21 #include "main.h"
  22 #include "tty.h"
  23
  24 #include <linux/delay.h>
  25 #include <linux/init.h>
  26 #include <linux/io.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/sched.h>
  30 #include <linux/slab.h>
  31
  32 #include <pcmcia/cisreg.h>
  33 #include <pcmcia/device_id.h>
  34 #include <pcmcia/ss.h>
  35 #include <pcmcia/ds.h>
  36
  37 static const 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, void *priv_data)
  80 {
  81         struct ipw_dev *ipw = priv_data;
  82         int ret;
  83
  84         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
  85         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  86
  87         /* 0x40 causes it to generate level mode interrupts. */
  88         /* 0x04 enables IREQ pin. */
  89         p_dev->config_index |= 0x44;
  90         p_dev->io_lines = 16;
  91         ret = pcmcia_request_io(p_dev);
  92         if (ret)
  93                 return ret;
  94
  95         if (!request_region(p_dev->resource[0]->start,
  96                             resource_size(p_dev->resource[0]),
  97                             IPWIRELESS_PCCARD_NAME)) {
  98                 ret = -EBUSY;
  99                 goto exit;
 100         }
 101
 102         p_dev->resource[2]->flags |=
 103                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 104
 105         ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
 106         if (ret != 0)
 107                 goto exit1;
 108
 109         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
 110         if (ret != 0)
 111                 goto exit1;
 112
 113         ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;
 114
 115         ipw->common_memory = ioremap(p_dev->resource[2]->start,
 116                                 resource_size(p_dev->resource[2]));
 117         if (!request_mem_region(p_dev->resource[2]->start,
 118                                 resource_size(p_dev->resource[2]),
 119                                 IPWIRELESS_PCCARD_NAME)) {
 120                 ret = -EBUSY;
 121                 goto exit2;
 122         }
 123
 124         p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
 125                                         WIN_ENABLE;
 126         p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
 127         ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
 128         if (ret != 0)
 129                 goto exit3;
 130
 131         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
 132         if (ret != 0)
 133                 goto exit3;
 134
 135         ipw->attr_memory = ioremap(p_dev->resource[3]->start,
 136                                 resource_size(p_dev->resource[3]));
 137         if (!request_mem_region(p_dev->resource[3]->start,
 138                                 resource_size(p_dev->resource[3]),
 139                                 IPWIRELESS_PCCARD_NAME)) {
 140                 ret = -EBUSY;
 141                 goto exit4;
 142         }
 143
 144         return 0;
 145
 146 exit4:
 147         iounmap(ipw->attr_memory);
 148 exit3:
 149         release_mem_region(p_dev->resource[2]->start,
 150                         resource_size(p_dev->resource[2]));
 151 exit2:
 152         iounmap(ipw->common_memory);
 153 exit1:
 154         release_region(p_dev->resource[0]->start,
 155                        resource_size(p_dev->resource[0]));
 156 exit:
 157         pcmcia_disable_device(p_dev);
 158         return ret;
 159 }
 160
 161 static int config_ipwireless(struct ipw_dev *ipw)
 162 {
 163         struct pcmcia_device *link = ipw->link;
 164         int ret = 0;
 165
 166         ipw->is_v2_card = 0;
 167         link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
 168                 CONF_ENABLE_IRQ;
 169
 170         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
 171         if (ret != 0)
 172                 return ret;
 173
 174         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
 175
 176         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
 177                                     ipw->attr_memory, ipw->common_memory,
 178                                     ipw->is_v2_card, signalled_reboot_callback,
 179                                     ipw);
 180
 181         ret = pcmcia_request_irq(link, ipwireless_interrupt);
 182         if (ret != 0)
 183                 goto exit;
 184
 185         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
 186                         ipw->is_v2_card ? "V2/V3" : "V1");
 187         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 188                 ": I/O ports %pR, irq %d\n", link->resource[0],
 189                         (unsigned int) link->irq);
 190         if (ipw->attr_memory && ipw->common_memory)
 191                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 192                         ": attr memory %pR, common memory %pR\n",
 193                         link->resource[3],
 194                         link->resource[2]);
 195
 196         ipw->network = ipwireless_network_create(ipw->hardware);
 197         if (!ipw->network)
 198                 goto exit;
 199
 200         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
 201         if (!ipw->tty)
 202                 goto exit;
 203
 204         ipwireless_init_hardware_v2_v3(ipw->hardware);
 205
 206         /*
 207          * Do the RequestConfiguration last, because it enables interrupts.
 208          * Then we don't get any interrupts before we're ready for them.
 209          */
 210         ret = pcmcia_enable_device(link);
 211         if (ret != 0)
 212                 goto exit;
 213
 214         return 0;
 215
 216 exit:
 217         if (ipw->common_memory) {
 218                 release_mem_region(link->resource[2]->start,
 219                                 resource_size(link->resource[2]));
 220                 iounmap(ipw->common_memory);
 221         }
 222         if (ipw->attr_memory) {
 223                 release_mem_region(link->resource[3]->start,
 224                                 resource_size(link->resource[3]));
 225                 iounmap(ipw->attr_memory);
 226         }
 227         pcmcia_disable_device(link);
 228         return -1;
 229 }
 230
 231 static void release_ipwireless(struct ipw_dev *ipw)
 232 {
 233         release_region(ipw->link->resource[0]->start,
 234                        resource_size(ipw->link->resource[0]));
 235         if (ipw->common_memory) {
 236                 release_mem_region(ipw->link->resource[2]->start,
 237                                 resource_size(ipw->link->resource[2]));
 238                 iounmap(ipw->common_memory);
 239         }
 240         if (ipw->attr_memory) {
 241                 release_mem_region(ipw->link->resource[3]->start,
 242                                 resource_size(ipw->link->resource[3]));
 243                 iounmap(ipw->attr_memory);
 244         }
 245         pcmcia_disable_device(ipw->link);
 246 }
 247
 248 /*
 249  * ipwireless_attach() creates an "instance" of the driver, allocating
 250  * local data structures for one device (one interface).  The device
 251  * is registered with Card Services.
 252  *
 253  * The pcmcia_device structure is initialized, but we don't actually
 254  * configure the card at this point -- we wait until we receive a
 255  * card insertion event.
 256  */
 257 static int ipwireless_attach(struct pcmcia_device *link)
 258 {
 259         struct ipw_dev *ipw;
 260         int ret;
 261
 262         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
 263         if (!ipw)
 264                 return -ENOMEM;
 265
 266         ipw->link = link;
 267         link->priv = ipw;
 268
 269         ipw->hardware = ipwireless_hardware_create();
 270         if (!ipw->hardware) {
 271                 kfree(ipw);
 272                 return -ENOMEM;
 273         }
 274         /* RegisterClient will call config_ipwireless */
 275
 276         ret = config_ipwireless(ipw);
 277
 278         if (ret != 0) {
 279                 ipwireless_detach(link);
 280                 return ret;
 281         }
 282
 283         return 0;
 284 }
 285
 286 /*
 287  * This deletes a driver "instance".  The device is de-registered with
 288  * Card Services.  If it has been released, all local data structures
 289  * are freed.  Otherwise, the structures will be freed when the device
 290  * is released.
 291  */
 292 static void ipwireless_detach(struct pcmcia_device *link)
 293 {
 294         struct ipw_dev *ipw = link->priv;
 295
 296         release_ipwireless(ipw);
 297
 298         if (ipw->tty != NULL)
 299                 ipwireless_tty_free(ipw->tty);
 300         if (ipw->network != NULL)
 301                 ipwireless_network_free(ipw->network);
 302         if (ipw->hardware != NULL)
 303                 ipwireless_hardware_free(ipw->hardware);
 304         kfree(ipw);
 305 }
 306
 307 static struct pcmcia_driver me = {
 308         .owner          = THIS_MODULE,
 309         .probe          = ipwireless_attach,
 310         .remove         = ipwireless_detach,
 311         .name           = IPWIRELESS_PCCARD_NAME,
 312         .id_table       = ipw_ids
 313 };
 314
 315 /*
 316  * Module insertion : initialisation of the module.
 317  * Register the card with cardmgr...
 318  */
 319 static int __init init_ipwireless(void)
 320 {
 321         int ret;
 322
 323         ret = ipwireless_tty_init();
 324         if (ret != 0)
 325                 return ret;
 326
 327         ret = pcmcia_register_driver(&me);
 328         if (ret != 0)
 329                 ipwireless_tty_release();
 330
 331         return ret;
 332 }
 333
 334 /*
 335  * Module removal
 336  */
 337 static void __exit exit_ipwireless(void)
 338 {
 339         pcmcia_unregister_driver(&me);
 340         ipwireless_tty_release();
 341 }
 342
 343 module_init(init_ipwireless);
 344 module_exit(exit_ipwireless);
 345
 346 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
 347 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
 348 MODULE_LICENSE("GPL");