drivers/net/wireless/orinoco/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 main.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 main.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/cistpl.h>
  29 #include <pcmcia/cisreg.h>
  30 #include <pcmcia/ds.h>
  31
  32 #include "orinoco.h"
  33
  34 /********************************************************************/
  35 /* Module stuff                                                     */
  36 /********************************************************************/
  37
  38 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
  39 MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
  40 MODULE_LICENSE("Dual MPL/GPL");
  41
  42 /* Module parameters */
  43
  44 /* Some D-Link cards have buggy CIS. They do work at 5v properly, but
  45  * don't have any CIS entry for it. This workaround it... */
  46 static int ignore_cis_vcc; /* = 0 */
  47 module_param(ignore_cis_vcc, int, 0);
  48 MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
  49
  50 /********************************************************************/
  51 /* Data structures                                                  */
  52 /********************************************************************/
  53
  54 /* PCMCIA specific device information (goes in the card field of
  55  * struct orinoco_private */
  56 struct orinoco_pccard {
  57         struct pcmcia_device    *p_dev;
  58 };
  59
  60 /********************************************************************/
  61 /* Function prototypes                                              */
  62 /********************************************************************/
  63
  64 static int spectrum_cs_config(struct pcmcia_device *link);
  65 static void spectrum_cs_release(struct pcmcia_device *link);
  66
  67 /* Constants for the CISREG_CCSR register */
  68 #define HCR_RUN         0x07    /* run firmware after reset */
  69 #define HCR_IDLE        0x0E    /* don't run firmware after reset */
  70 #define HCR_MEM16       0x10    /* memory width bit, should be preserved */
  71
  72
  73 /*
  74  * Reset the card using configuration registers COR and CCSR.
  75  * If IDLE is 1, stop the firmware, so that it can be safely rewritten.
  76  */
  77 static int
  78 spectrum_reset(struct pcmcia_device *link, int idle)
  79 {
  80         int ret;
  81         u8 save_cor;
  82         u8 ccsr;
  83
  84         /* Doing it if hardware is gone is guaranteed crash */
  85         if (!pcmcia_dev_present(link))
  86                 return -ENODEV;
  87
  88         /* Save original COR value */
  89         ret = pcmcia_read_config_byte(link, CISREG_COR, &save_cor);
  90         if (ret)
  91                 goto failed;
  92
  93         /* Soft-Reset card */
  94         ret = pcmcia_write_config_byte(link, CISREG_COR,
  95                                 (save_cor | COR_SOFT_RESET));
  96         if (ret)
  97                 goto failed;
  98         udelay(1000);
  99
 100         /* Read CCSR */
 101         ret = pcmcia_read_config_byte(link, CISREG_CCSR, &ccsr);
 102         if (ret)
 103                 goto failed;
 104
 105         /*
 106          * Start or stop the firmware.  Memory width bit should be
 107          * preserved from the value we've just read.
 108          */
 109         ccsr = (idle ? HCR_IDLE : HCR_RUN) | (ccsr & HCR_MEM16);
 110         ret = pcmcia_write_config_byte(link, CISREG_CCSR, ccsr);
 111         if (ret)
 112                 goto failed;
 113         udelay(1000);
 114
 115         /* Restore original COR configuration index */
 116         ret = pcmcia_write_config_byte(link, CISREG_COR,
 117                                 (save_cor & ~COR_SOFT_RESET));
 118         if (ret)
 119                 goto failed;
 120         udelay(1000);
 121         return 0;
 122
 123 failed:
 124         return -ENODEV;
 125 }
 126
 127 /********************************************************************/
 128 /* Device methods                                                   */
 129 /********************************************************************/
 130
 131 static int
 132 spectrum_cs_hard_reset(struct orinoco_private *priv)
 133 {
 134         struct orinoco_pccard *card = priv->card;
 135         struct pcmcia_device *link = card->p_dev;
 136
 137         /* Soft reset using COR and HCR */
 138         spectrum_reset(link, 0);
 139
 140         return 0;
 141 }
 142
 143 static int
 144 spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle)
 145 {
 146         struct orinoco_pccard *card = priv->card;
 147         struct pcmcia_device *link = card->p_dev;
 148
 149         return spectrum_reset(link, idle);
 150 }
 151
 152 /********************************************************************/
 153 /* PCMCIA stuff                                                     */
 154 /********************************************************************/
 155
 156 static int
 157 spectrum_cs_probe(struct pcmcia_device *link)
 158 {
 159         struct orinoco_private *priv;
 160         struct orinoco_pccard *card;
 161
 162         priv = alloc_orinocodev(sizeof(*card), &link->dev,
 163                                 spectrum_cs_hard_reset,
 164                                 spectrum_cs_stop_firmware);
 165         if (!priv)
 166                 return -ENOMEM;
 167         card = priv->card;
 168
 169         /* Link both structures together */
 170         card->p_dev = link;
 171         link->priv = priv;
 172
 173         return spectrum_cs_config(link);
 174 }                               /* spectrum_cs_attach */
 175
 176 static void spectrum_cs_detach(struct pcmcia_device *link)
 177 {
 178         struct orinoco_private *priv = link->priv;
 179
 180         orinoco_if_del(priv);
 181
 182         spectrum_cs_release(link);
 183
 184         free_orinocodev(priv);
 185 }                               /* spectrum_cs_detach */
 186
 187 static int spectrum_cs_config_check(struct pcmcia_device *p_dev,
 188                                     void *priv_data)
 189 {
 190         if (p_dev->config_index == 0)
 191                 return -EINVAL;
 192
 193         return pcmcia_request_io(p_dev);
 194 };
 195
 196 static int
 197 spectrum_cs_config(struct pcmcia_device *link)
 198 {
 199         struct orinoco_private *priv = link->priv;
 200         struct hermes *hw = &priv->hw;
 201         int ret;
 202         void __iomem *mem;
 203
 204         link->config_flags |= CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC |
 205                 CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
 206         if (ignore_cis_vcc)
 207                 link->config_flags &= ~CONF_AUTO_CHECK_VCC;
 208         ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL);
 209         if (ret) {
 210                 if (!ignore_cis_vcc)
 211                         printk(KERN_ERR PFX "GetNextTuple(): No matching "
 212                                "CIS configuration.  Maybe you need the "
 213                                "ignore_cis_vcc=1 parameter.\n");
 214                 goto failed;
 215         }
 216
 217         mem = ioport_map(link->resource[0]->start,
 218                         resource_size(link->resource[0]));
 219         if (!mem)
 220                 goto failed;
 221
 222         /* We initialize the hermes structure before completing PCMCIA
 223          * configuration just in case the interrupt handler gets
 224          * called. */
 225         hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
 226         hw->eeprom_pda = true;
 227
 228         ret = pcmcia_request_irq(link, orinoco_interrupt);
 229         if (ret)
 230                 goto failed;
 231
 232         ret = pcmcia_enable_device(link);
 233         if (ret)
 234                 goto failed;
 235
 236         /* Reset card */
 237         if (spectrum_cs_hard_reset(priv) != 0)
 238                 goto failed;
 239
 240         /* Initialise the main driver */
 241         if (orinoco_init(priv) != 0) {
 242                 printk(KERN_ERR PFX "orinoco_init() failed\n");
 243                 goto failed;
 244         }
 245
 246         /* Register an interface with the stack */
 247         if (orinoco_if_add(priv, link->resource[0]->start,
 248                            link->irq, NULL) != 0) {
 249                 printk(KERN_ERR PFX "orinoco_if_add() failed\n");
 250                 goto failed;
 251         }
 252
 253         return 0;
 254
 255  failed:
 256         spectrum_cs_release(link);
 257         return -ENODEV;
 258 }                               /* spectrum_cs_config */
 259
 260 static void
 261 spectrum_cs_release(struct pcmcia_device *link)
 262 {
 263         struct orinoco_private *priv = link->priv;
 264         unsigned long flags;
 265
 266         /* We're committed to taking the device away now, so mark the
 267          * hardware as unavailable */
 268         priv->hw.ops->lock_irqsave(&priv->lock, &flags);
 269         priv->hw_unavailable++;
 270         priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
 271
 272         pcmcia_disable_device(link);
 273         if (priv->hw.iobase)
 274                 ioport_unmap(priv->hw.iobase);
 275 }                               /* spectrum_cs_release */
 276
 277
 278 static int
 279 spectrum_cs_suspend(struct pcmcia_device *link)
 280 {
 281         struct orinoco_private *priv = link->priv;
 282         int err = 0;
 283
 284         /* Mark the device as stopped, to block IO until later */
 285         orinoco_down(priv);
 286
 287         return err;
 288 }
 289
 290 static int
 291 spectrum_cs_resume(struct pcmcia_device *link)
 292 {
 293         struct orinoco_private *priv = link->priv;
 294         int err = orinoco_up(priv);
 295
 296         return err;
 297 }
 298
 299
 300 /********************************************************************/
 301 /* Module initialization                                            */
 302 /********************************************************************/
 303
 304 static const struct pcmcia_device_id spectrum_cs_ids[] = {
 305         PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */
 306         PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
 307         PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */
 308         PCMCIA_DEVICE_NULL,
 309 };
 310 MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
 311
 312 static struct pcmcia_driver orinoco_driver = {
 313         .owner          = THIS_MODULE,
 314         .name           = DRIVER_NAME,
 315         .probe          = spectrum_cs_probe,
 316         .remove         = spectrum_cs_detach,
 317         .suspend        = spectrum_cs_suspend,
 318         .resume         = spectrum_cs_resume,
 319         .id_table       = spectrum_cs_ids,
 320 };
 321 module_pcmcia_driver(orinoco_driver);