drivers/net/wireless/spectrum_cs.c

   1 /*
   2  * Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
   3  * Symbol Wireless Networker LA4137, CompactFlash cards by Socket
   4  * Communications and Intel PRO/Wireless 2011B.
   5  *
   6  * The driver implements Symbol firmware download.  The rest is handled
   7  * in hermes.c and orinoco.c.
   8  *
   9  * Utilities for downloading the Symbol firmware are available at
  10  * http://sourceforge.net/projects/orinoco/
  11  *
  12  * Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
  13  * Portions based on orinoco_cs.c:
  14  *      Copyright (C) David Gibson, Linuxcare Australia
  15  * Portions based on Spectrum24tDnld.c from original spectrum24 driver:
  16  *      Copyright (C) Symbol Technologies.
  17  *
  18  * See copyright notice in file orinoco.c.
  19  */
  20
  21 #define DRIVER_NAME "spectrum_cs"
  22 #define PFX DRIVER_NAME ": "
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <pcmcia/cs_types.h>
  29 #include <pcmcia/cs.h>
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/cisreg.h>
  32 #include <pcmcia/ds.h>
  33
  34 #include "orinoco.h"
  35
  36 /********************************************************************/
  37 /* Module stuff                                                     */
  38 /********************************************************************/
  39
  40 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
  41 MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
  42 MODULE_LICENSE("Dual MPL/GPL");
  43
  44 /* Module parameters */
  45
  46 /* Some D-Link cards have buggy CIS. They do work at 5v properly, but
  47  * don't have any CIS entry for it. This workaround it... */
  48 static int ignore_cis_vcc; /* = 0 */
  49 module_param(ignore_cis_vcc, int, 0);
  50 MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
  51
  52 /********************************************************************/
  53 /* Data structures                                                  */
  54 /********************************************************************/
  55
  56 /* PCMCIA specific device information (goes in the card field of
  57  * struct orinoco_private */
  58 struct orinoco_pccard {
  59         struct pcmcia_device    *p_dev;
  60         dev_node_t node;
  61 };
  62
  63 /********************************************************************/
  64 /* Function prototypes                                              */
  65 /********************************************************************/
  66
  67 static int spectrum_cs_config(struct pcmcia_device *link);
  68 static void spectrum_cs_release(struct pcmcia_device *link);
  69
  70 /* Constants for the CISREG_CCSR register */
  71 #define HCR_RUN         0x07    /* run firmware after reset */
  72 #define HCR_IDLE        0x0E    /* don't run firmware after reset */
  73 #define HCR_MEM16       0x10    /* memory width bit, should be preserved */
  74
  75
  76 #define CS_CHECK(fn, ret) \
  77   do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
  78
  79 /*
  80  * Reset the card using configuration registers COR and CCSR.
  81  * If IDLE is 1, stop the firmware, so that it can be safely rewritten.
  82  */
  83 static int
  84 spectrum_reset(struct pcmcia_device *link, int idle)
  85 {
  86         int last_ret, last_fn;
  87         conf_reg_t reg;
  88         u_int save_cor;
  89
  90         /* Doing it if hardware is gone is guaranteed crash */
  91         if (!pcmcia_dev_present(link))
  92                 return -ENODEV;
  93
  94         /* Save original COR value */
  95         reg.Function = 0;
  96         reg.Action = CS_READ;
  97         reg.Offset = CISREG_COR;
  98         CS_CHECK(AccessConfigurationRegister,
  99                  pcmcia_access_configuration_register(link, &reg));
 100         save_cor = reg.Value;
 101
 102         /* Soft-Reset card */
 103         reg.Action = CS_WRITE;
 104         reg.Offset = CISREG_COR;
 105         reg.Value = (save_cor | COR_SOFT_RESET);
 106         CS_CHECK(AccessConfigurationRegister,
 107                  pcmcia_access_configuration_register(link, &reg));
 108         udelay(1000);
 109
 110         /* Read CCSR */
 111         reg.Action = CS_READ;
 112         reg.Offset = CISREG_CCSR;
 113         CS_CHECK(AccessConfigurationRegister,
 114                  pcmcia_access_configuration_register(link, &reg));
 115
 116         /*
 117          * Start or stop the firmware.  Memory width bit should be
 118          * preserved from the value we've just read.
 119          */
 120         reg.Action = CS_WRITE;
 121         reg.Offset = CISREG_CCSR;
 122         reg.Value = (idle ? HCR_IDLE : HCR_RUN) | (reg.Value & HCR_MEM16);
 123         CS_CHECK(AccessConfigurationRegister,
 124                  pcmcia_access_configuration_register(link, &reg));
 125         udelay(1000);
 126
 127         /* Restore original COR configuration index */
 128         reg.Action = CS_WRITE;
 129         reg.Offset = CISREG_COR;
 130         reg.Value = (save_cor & ~COR_SOFT_RESET);
 131         CS_CHECK(AccessConfigurationRegister,
 132                  pcmcia_access_configuration_register(link, &reg));
 133         udelay(1000);
 134         return 0;
 135
 136       cs_failed:
 137         cs_error(link, last_fn, last_ret);
 138         return -ENODEV;
 139 }
 140
 141 /********************************************************************/
 142 /* Device methods                                                   */
 143 /********************************************************************/
 144
 145 static int
 146 spectrum_cs_hard_reset(struct orinoco_private *priv)
 147 {
 148         struct orinoco_pccard *card = priv->card;
 149         struct pcmcia_device *link = card->p_dev;
 150
 151         /* Soft reset using COR and HCR */
 152         spectrum_reset(link, 0);
 153
 154         return 0;
 155 }
 156
 157 static int
 158 spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle)
 159 {
 160         struct orinoco_pccard *card = priv->card;
 161         struct pcmcia_device *link = card->p_dev;
 162
 163         return spectrum_reset(link, idle);
 164 }
 165
 166 /********************************************************************/
 167 /* PCMCIA stuff                                                     */
 168 /********************************************************************/
 169
 170 /*
 171  * This creates an "instance" of the driver, allocating local data
 172  * structures for one device.  The device is registered with Card
 173  * Services.
 174  *
 175  * The dev_link structure is initialized, but we don't actually
 176  * configure the card at this point -- we wait until we receive a card
 177  * insertion event.  */
 178 static int
 179 spectrum_cs_probe(struct pcmcia_device *link)
 180 {
 181         struct net_device *dev;
 182         struct orinoco_private *priv;
 183         struct orinoco_pccard *card;
 184
 185         dev = alloc_orinocodev(sizeof(*card), &handle_to_dev(link),
 186                                spectrum_cs_hard_reset,
 187                                spectrum_cs_stop_firmware);
 188         if (! dev)
 189                 return -ENOMEM;
 190         priv = netdev_priv(dev);
 191         card = priv->card;
 192
 193         /* Link both structures together */
 194         card->p_dev = link;
 195         link->priv = dev;
 196
 197         /* Interrupt setup */
 198         link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT;
 199         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 200         link->irq.Handler = orinoco_interrupt;
 201         link->irq.Instance = dev;
 202
 203         /* General socket configuration defaults can go here.  In this
 204          * client, we assume very little, and rely on the CIS for
 205          * almost everything.  In most clients, many details (i.e.,
 206          * number, sizes, and attributes of IO windows) are fixed by
 207          * the nature of the device, and can be hard-wired here. */
 208         link->conf.Attributes = 0;
 209         link->conf.IntType = INT_MEMORY_AND_IO;
 210
 211         return spectrum_cs_config(link);
 212 }                               /* spectrum_cs_attach */
 213
 214 /*
 215  * This deletes a driver "instance".  The device is de-registered with
 216  * Card Services.  If it has been released, all local data structures
 217  * are freed.  Otherwise, the structures will be freed when the device
 218  * is released.
 219  */
 220 static void spectrum_cs_detach(struct pcmcia_device *link)
 221 {
 222         struct net_device *dev = link->priv;
 223
 224         if (link->dev_node)
 225                 unregister_netdev(dev);
 226
 227         spectrum_cs_release(link);
 228
 229         free_orinocodev(dev);
 230 }                               /* spectrum_cs_detach */
 231
 232 /*
 233  * spectrum_cs_config() is scheduled to run after a CARD_INSERTION
 234  * event is received, to configure the PCMCIA socket, and to make the
 235  * device available to the system.
 236  */
 237
 238 static int spectrum_cs_config_check(struct pcmcia_device *p_dev,
 239                                     cistpl_cftable_entry_t *cfg,
 240                                     cistpl_cftable_entry_t *dflt,
 241                                     unsigned int vcc,
 242                                     void *priv_data)
 243 {
 244         if (cfg->index == 0)
 245                 goto next_entry;
 246
 247         /* Use power settings for Vcc and Vpp if present */
 248         /* Note that the CIS values need to be rescaled */
 249         if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
 250                 if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000) {
 251                         DEBUG(2, "spectrum_cs_config: Vcc mismatch (vcc = %d, CIS = %d)\n",  vcc, cfg->vcc.param[CISTPL_POWER_VNOM] / 10000);
 252                         if (!ignore_cis_vcc)
 253                                 goto next_entry;
 254                 }
 255         } else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
 256                 if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000) {
 257                         DEBUG(2, "spectrum_cs_config: Vcc mismatch (vcc = %d, CIS = %d)\n",  vcc, dflt->vcc.param[CISTPL_POWER_VNOM] / 10000);
 258                         if (!ignore_cis_vcc)
 259                                 goto next_entry;
 260                 }
 261         }
 262
 263         if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
 264                 p_dev->conf.Vpp =
 265                         cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 266         else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
 267                 p_dev->conf.Vpp =
 268                         dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 269
 270         /* Do we need to allocate an interrupt? */
 271         p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 272
 273         /* IO window settings */
 274         p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
 275         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 276                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 277                 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 278                 if (!(io->flags & CISTPL_IO_8BIT))
 279                         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 280                 if (!(io->flags & CISTPL_IO_16BIT))
 281                         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 282                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 283                 p_dev->io.BasePort1 = io->win[0].base;
 284                 p_dev->io.NumPorts1 = io->win[0].len;
 285                 if (io->nwin > 1) {
 286                         p_dev->io.Attributes2 = p_dev->io.Attributes1;
 287                         p_dev->io.BasePort2 = io->win[1].base;
 288                         p_dev->io.NumPorts2 = io->win[1].len;
 289                 }
 290
 291                 /* This reserves IO space but doesn't actually enable it */
 292                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 293                         goto next_entry;
 294         }
 295         return 0;
 296
 297 next_entry:
 298         pcmcia_disable_device(p_dev);
 299         return -ENODEV;
 300 };
 301
 302 static int
 303 spectrum_cs_config(struct pcmcia_device *link)
 304 {
 305         struct net_device *dev = link->priv;
 306         struct orinoco_private *priv = netdev_priv(dev);
 307         struct orinoco_pccard *card = priv->card;
 308         hermes_t *hw = &priv->hw;
 309         int last_fn, last_ret;
 310         void __iomem *mem;
 311
 312         /*
 313          * In this loop, we scan the CIS for configuration table
 314          * entries, each of which describes a valid card
 315          * configuration, including voltage, IO window, memory window,
 316          * and interrupt settings.
 317          *
 318          * We make no assumptions about the card to be configured: we
 319          * use just the information available in the CIS.  In an ideal
 320          * world, this would work for any PCMCIA card, but it requires
 321          * a complete and accurate CIS.  In practice, a driver usually
 322          * "knows" most of these things without consulting the CIS,
 323          * and most client drivers will only use the CIS to fill in
 324          * implementation-defined details.
 325          */
 326         last_ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL);
 327         if (last_ret) {
 328                 if (!ignore_cis_vcc)
 329                         printk(KERN_ERR PFX "GetNextTuple(): No matching "
 330                                "CIS configuration.  Maybe you need the "
 331                                "ignore_cis_vcc=1 parameter.\n");
 332                 cs_error(link, RequestIO, last_ret);
 333                 goto failed;
 334         }
 335
 336         /*
 337          * Allocate an interrupt line.  Note that this does not assign
 338          * a handler to the interrupt, unless the 'Handler' member of
 339          * the irq structure is initialized.
 340          */
 341         CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 342
 343         /* We initialize the hermes structure before completing PCMCIA
 344          * configuration just in case the interrupt handler gets
 345          * called. */
 346         mem = ioport_map(link->io.BasePort1, link->io.NumPorts1);
 347         if (!mem)
 348                 goto cs_failed;
 349
 350         hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
 351
 352         /*
 353          * This actually configures the PCMCIA socket -- setting up
 354          * the I/O windows and the interrupt mapping, and putting the
 355          * card and host interface into "Memory and IO" mode.
 356          */
 357         CS_CHECK(RequestConfiguration,
 358                  pcmcia_request_configuration(link, &link->conf));
 359
 360         /* Ok, we have the configuration, prepare to register the netdev */
 361         dev->base_addr = link->io.BasePort1;
 362         dev->irq = link->irq.AssignedIRQ;
 363         card->node.major = card->node.minor = 0;
 364
 365         /* Reset card */
 366         if (spectrum_cs_hard_reset(priv) != 0) {
 367                 goto failed;
 368         }
 369
 370         SET_NETDEV_DEV(dev, &handle_to_dev(link));
 371         /* Tell the stack we exist */
 372         if (register_netdev(dev) != 0) {
 373                 printk(KERN_ERR PFX "register_netdev() failed\n");
 374                 goto failed;
 375         }
 376
 377         /* At this point, the dev_node_t structure(s) needs to be
 378          * initialized and arranged in a linked list at link->dev_node. */
 379         strcpy(card->node.dev_name, dev->name);
 380         link->dev_node = &card->node; /* link->dev_node being non-NULL is also
 381                                     used to indicate that the
 382                                     net_device has been registered */
 383
 384         /* Finally, report what we've done */
 385         printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s, irq %d, io "
 386                "0x%04x-0x%04x\n", dev->name, dev->dev.parent->bus_id,
 387                link->irq.AssignedIRQ, link->io.BasePort1,
 388                link->io.BasePort1 + link->io.NumPorts1 - 1);
 389
 390         return 0;
 391
 392  cs_failed:
 393         cs_error(link, last_fn, last_ret);
 394
 395  failed:
 396         spectrum_cs_release(link);
 397         return -ENODEV;
 398 }                               /* spectrum_cs_config */
 399
 400 /*
 401  * After a card is removed, spectrum_cs_release() will unregister the
 402  * device, and release the PCMCIA configuration.  If the device is
 403  * still open, this will be postponed until it is closed.
 404  */
 405 static void
 406 spectrum_cs_release(struct pcmcia_device *link)
 407 {
 408         struct net_device *dev = link->priv;
 409         struct orinoco_private *priv = netdev_priv(dev);
 410         unsigned long flags;
 411
 412         /* We're committed to taking the device away now, so mark the
 413          * hardware as unavailable */
 414         spin_lock_irqsave(&priv->lock, flags);
 415         priv->hw_unavailable++;
 416         spin_unlock_irqrestore(&priv->lock, flags);
 417
 418         pcmcia_disable_device(link);
 419         if (priv->hw.iobase)
 420                 ioport_unmap(priv->hw.iobase);
 421 }                               /* spectrum_cs_release */
 422
 423
 424 static int
 425 spectrum_cs_suspend(struct pcmcia_device *link)
 426 {
 427         struct net_device *dev = link->priv;
 428         struct orinoco_private *priv = netdev_priv(dev);
 429         unsigned long flags;
 430         int err = 0;
 431
 432         /* Mark the device as stopped, to block IO until later */
 433         spin_lock_irqsave(&priv->lock, flags);
 434
 435         err = __orinoco_down(dev);
 436         if (err)
 437                 printk(KERN_WARNING "%s: Error %d downing interface\n",
 438                        dev->name, err);
 439
 440         netif_device_detach(dev);
 441         priv->hw_unavailable++;
 442
 443         spin_unlock_irqrestore(&priv->lock, flags);
 444
 445         return err;
 446 }
 447
 448 static int
 449 spectrum_cs_resume(struct pcmcia_device *link)
 450 {
 451         struct net_device *dev = link->priv;
 452         struct orinoco_private *priv = netdev_priv(dev);
 453
 454         netif_device_attach(dev);
 455         priv->hw_unavailable--;
 456         schedule_work(&priv->reset_work);
 457
 458         return 0;
 459 }
 460
 461
 462 /********************************************************************/
 463 /* Module initialization                                            */
 464 /********************************************************************/
 465
 466 /* Can't be declared "const" or the whole __initdata section will
 467  * become const */
 468 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 469         " (Pavel Roskin <proski@gnu.org>,"
 470         " David Gibson <hermes@gibson.dropbear.id.au>, et al)";
 471
 472 static struct pcmcia_device_id spectrum_cs_ids[] = {
 473         PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */
 474         PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
 475         PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */
 476         PCMCIA_DEVICE_NULL,
 477 };
 478 MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
 479
 480 static struct pcmcia_driver orinoco_driver = {
 481         .owner          = THIS_MODULE,
 482         .drv            = {
 483                 .name   = DRIVER_NAME,
 484         },
 485         .probe          = spectrum_cs_probe,
 486         .remove         = spectrum_cs_detach,
 487         .suspend        = spectrum_cs_suspend,
 488         .resume         = spectrum_cs_resume,
 489         .id_table       = spectrum_cs_ids,
 490 };
 491
 492 static int __init
 493 init_spectrum_cs(void)
 494 {
 495         printk(KERN_DEBUG "%s\n", version);
 496
 497         return pcmcia_register_driver(&orinoco_driver);
 498 }
 499
 500 static void __exit
 501 exit_spectrum_cs(void)
 502 {
 503         pcmcia_unregister_driver(&orinoco_driver);
 504 }
 505
 506 module_init(init_spectrum_cs);
 507 module_exit(exit_spectrum_cs);