drivers/net/wireless/intersil/prism54/islpci

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
prism54_probe
prism54_remove
prism54_suspend
prism54_resume
prism54_module_init
prism54_module_exit
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Copyright (C) 2002 Intersil Americas Inc.
   4  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   5  */
   6 
   7 #include <linux/interrupt.h>
   8 #include <linux/module.h>
   9 #include <linux/pci.h>
  10 #include <linux/delay.h>
  11 #include <linux/init.h> /* For __init, __exit */
  12 #include <linux/dma-mapping.h>
  13 
  14 #include "prismcompat.h"
  15 #include "islpci_dev.h"
  16 #include "islpci_mgt.h"         /* for pc_debug */
  17 #include "isl_oid.h"
  18 
  19 MODULE_AUTHOR("[Intersil] R.Bastings and W.Termorshuizen, The prism54.org Development Team <prism54-devel@prism54.org>");
  20 MODULE_DESCRIPTION("The Prism54 802.11 Wireless LAN adapter");
  21 MODULE_LICENSE("GPL");
  22 
  23 static int      init_pcitm = 0;
  24 module_param(init_pcitm, int, 0);
  25 
  26 /* In this order: vendor, device, subvendor, subdevice, class, class_mask,
  27  * driver_data
  28  * If you have an update for this please contact prism54-devel@prism54.org
  29  * The latest list can be found at http://wireless.kernel.org/en/users/Drivers/p54 */
  30 static const struct pci_device_id prism54_id_tbl[] = {
  31         /* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
  32         {
  33          0x1260, 0x3890,
  34          PCI_ANY_ID, PCI_ANY_ID,
  35          0, 0, 0
  36         },
  37 
  38         /* 3COM 3CRWE154G72 Wireless LAN adapter */
  39         {
  40          PCI_VDEVICE(3COM, 0x6001), 0
  41         },
  42 
  43         /* Intersil PRISM Indigo Wireless LAN adapter */
  44         {
  45          0x1260, 0x3877,
  46          PCI_ANY_ID, PCI_ANY_ID,
  47          0, 0, 0
  48         },
  49 
  50         /* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
  51         {
  52          0x1260, 0x3886,
  53          PCI_ANY_ID, PCI_ANY_ID,
  54          0, 0, 0
  55         },
  56 
  57         /* End of list */
  58         {0,0,0,0,0,0,0}
  59 };
  60 
  61 /* register the device with the Hotplug facilities of the kernel */
  62 MODULE_DEVICE_TABLE(pci, prism54_id_tbl);
  63 
  64 static int prism54_probe(struct pci_dev *, const struct pci_device_id *);
  65 static void prism54_remove(struct pci_dev *);
  66 static int prism54_suspend(struct pci_dev *, pm_message_t state);
  67 static int prism54_resume(struct pci_dev *);
  68 
  69 static struct pci_driver prism54_driver = {
  70         .name = DRV_NAME,
  71         .id_table = prism54_id_tbl,
  72         .probe = prism54_probe,
  73         .remove = prism54_remove,
  74         .suspend = prism54_suspend,
  75         .resume = prism54_resume,
  76 };
  77 
  78 /******************************************************************************
  79     Module initialization functions
  80 ******************************************************************************/
  81 
  82 static int
  83 prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  84 {
  85         struct net_device *ndev;
  86         u8 latency_tmr;
  87         u32 mem_addr;
  88         islpci_private *priv;
  89         int rvalue;
  90 
  91         /* Enable the pci device */
  92         if (pci_enable_device(pdev)) {
  93                 printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME);
  94                 return -ENODEV;
  95         }
  96 
  97         /* check whether the latency timer is set correctly */
  98         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr);
  99 #if VERBOSE > SHOW_ERROR_MESSAGES
 100         DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr);
 101 #endif
 102         if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) {
 103                 /* set the latency timer */
 104                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER,
 105                                       PCIDEVICE_LATENCY_TIMER_VAL);
 106         }
 107 
 108         /* enable PCI DMA */
 109         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
 110                 printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME);
 111                 goto do_pci_disable_device;
 112         }
 113 
 114         /* 0x40 is the programmable timer to configure the response timeout (TRDY_TIMEOUT)
 115          * 0x41 is the programmable timer to configure the retry timeout (RETRY_TIMEOUT)
 116          *      The RETRY_TIMEOUT is used to set the number of retries that the core, as a
 117          *      Master, will perform before abandoning a cycle. The default value for
 118          *      RETRY_TIMEOUT is 0x80, which far exceeds the PCI 2.1 requirement for new
 119          *      devices. A write of zero to the RETRY_TIMEOUT register disables this
 120          *      function to allow use with any non-compliant legacy devices that may
 121          *      execute more retries.
 122          *
 123          *      Writing zero to both these two registers will disable both timeouts and
 124          *      *can* solve problems caused by devices that are slow to respond.
 125          *      Make this configurable - MSW
 126          */
 127         if ( init_pcitm >= 0 ) {
 128                 pci_write_config_byte(pdev, 0x40, (u8)init_pcitm);
 129                 pci_write_config_byte(pdev, 0x41, (u8)init_pcitm);
 130         } else {
 131                 printk(KERN_INFO "PCI TRDY/RETRY unchanged\n");
 132         }
 133 
 134         /* request the pci device I/O regions */
 135         rvalue = pci_request_regions(pdev, DRV_NAME);
 136         if (rvalue) {
 137                 printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n",
 138                        DRV_NAME, rvalue);
 139                 goto do_pci_disable_device;
 140         }
 141 
 142         /* check if the memory window is indeed set */
 143         rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr);
 144         if (rvalue || !mem_addr) {
 145                 printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n",
 146                        DRV_NAME);
 147                 goto do_pci_release_regions;
 148         }
 149 
 150         /* enable PCI bus-mastering */
 151         DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME);
 152         pci_set_master(pdev);
 153 
 154         /* enable MWI */
 155         pci_try_set_mwi(pdev);
 156 
 157         /* setup the network device interface and its structure */
 158         if (!(ndev = islpci_setup(pdev))) {
 159                 /* error configuring the driver as a network device */
 160                 printk(KERN_ERR "%s: could not configure network device\n",
 161                        DRV_NAME);
 162                 goto do_pci_clear_mwi;
 163         }
 164 
 165         priv = netdev_priv(ndev);
 166         islpci_set_state(priv, PRV_STATE_PREBOOT); /* we are attempting to boot */
 167 
 168         /* card is in unknown state yet, might have some interrupts pending */
 169         isl38xx_disable_interrupts(priv->device_base);
 170 
 171         /* request for the interrupt before uploading the firmware */
 172         rvalue = request_irq(pdev->irq, islpci_interrupt,
 173                              IRQF_SHARED, ndev->name, priv);
 174 
 175         if (rvalue) {
 176                 /* error, could not hook the handler to the irq */
 177                 printk(KERN_ERR "%s: could not install IRQ handler\n",
 178                        ndev->name);
 179                 goto do_unregister_netdev;
 180         }
 181 
 182         /* firmware upload is triggered in islpci_open */
 183 
 184         return 0;
 185 
 186       do_unregister_netdev:
 187         unregister_netdev(ndev);
 188         islpci_free_memory(priv);
 189         free_netdev(ndev);
 190         priv = NULL;
 191       do_pci_clear_mwi:
 192         pci_clear_mwi(pdev);
 193       do_pci_release_regions:
 194         pci_release_regions(pdev);
 195       do_pci_disable_device:
 196         pci_disable_device(pdev);
 197         return -EIO;
 198 }
 199 
 200 /* set by cleanup_module */
 201 static volatile int __in_cleanup_module = 0;
 202 
 203 /* this one removes one(!!) instance only */
 204 static void
 205 prism54_remove(struct pci_dev *pdev)
 206 {
 207         struct net_device *ndev = pci_get_drvdata(pdev);
 208         islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
 209         BUG_ON(!priv);
 210 
 211         if (!__in_cleanup_module) {
 212                 printk(KERN_DEBUG "%s: hot unplug detected\n", ndev->name);
 213                 islpci_set_state(priv, PRV_STATE_OFF);
 214         }
 215 
 216         printk(KERN_DEBUG "%s: removing device\n", ndev->name);
 217 
 218         unregister_netdev(ndev);
 219 
 220         /* free the interrupt request */
 221 
 222         if (islpci_get_state(priv) != PRV_STATE_OFF) {
 223                 isl38xx_disable_interrupts(priv->device_base);
 224                 islpci_set_state(priv, PRV_STATE_OFF);
 225                 /* This bellow causes a lockup at rmmod time. It might be
 226                  * because some interrupts still linger after rmmod time,
 227                  * see bug #17 */
 228                 /* pci_set_power_state(pdev, 3);*/      /* try to power-off */
 229         }
 230 
 231         free_irq(pdev->irq, priv);
 232 
 233         /* free the PCI memory and unmap the remapped page */
 234         islpci_free_memory(priv);
 235 
 236         free_netdev(ndev);
 237         priv = NULL;
 238 
 239         pci_clear_mwi(pdev);
 240 
 241         pci_release_regions(pdev);
 242 
 243         pci_disable_device(pdev);
 244 }
 245 
 246 static int
 247 prism54_suspend(struct pci_dev *pdev, pm_message_t state)
 248 {
 249         struct net_device *ndev = pci_get_drvdata(pdev);
 250         islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
 251         BUG_ON(!priv);
 252 
 253 
 254         pci_save_state(pdev);
 255 
 256         /* tell the device not to trigger interrupts for now... */
 257         isl38xx_disable_interrupts(priv->device_base);
 258 
 259         /* from now on assume the hardware was already powered down
 260            and don't touch it anymore */
 261         islpci_set_state(priv, PRV_STATE_OFF);
 262 
 263         netif_stop_queue(ndev);
 264         netif_device_detach(ndev);
 265 
 266         return 0;
 267 }
 268 
 269 static int
 270 prism54_resume(struct pci_dev *pdev)
 271 {
 272         struct net_device *ndev = pci_get_drvdata(pdev);
 273         islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
 274         int err;
 275 
 276         BUG_ON(!priv);
 277 
 278         printk(KERN_NOTICE "%s: got resume request\n", ndev->name);
 279 
 280         err = pci_enable_device(pdev);
 281         if (err) {
 282                 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
 283                        ndev->name);
 284                 return err;
 285         }
 286 
 287         pci_restore_state(pdev);
 288 
 289         /* alright let's go into the PREBOOT state */
 290         islpci_reset(priv, 1);
 291 
 292         netif_device_attach(ndev);
 293         netif_start_queue(ndev);
 294 
 295         return 0;
 296 }
 297 
 298 static int __init
 299 prism54_module_init(void)
 300 {
 301         printk(KERN_INFO "Loaded %s driver, version %s\n",
 302                DRV_NAME, DRV_VERSION);
 303 
 304         __bug_on_wrong_struct_sizes ();
 305 
 306         return pci_register_driver(&prism54_driver);
 307 }
 308 
 309 /* by the time prism54_module_exit() terminates, as a postcondition
 310  * all instances will have been destroyed by calls to
 311  * prism54_remove() */
 312 static void __exit
 313 prism54_module_exit(void)
 314 {
 315         __in_cleanup_module = 1;
 316 
 317         pci_unregister_driver(&prism54_driver);
 318 
 319         printk(KERN_INFO "Unloaded %s driver\n", DRV_NAME);
 320 
 321         __in_cleanup_module = 0;
 322 }
 323 
 324 /* register entry points */
 325 module_init(prism54_module_init);
 326 module_exit(prism54_module_exit);
 327 /* EOF */
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/intersil/prism54/islpci_hotplug.c

DEFINITIONS
