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