Update compat-wireless to 2.6.36-5-spn

chromeos/compat-wireless/drivers/net/wireless/orinoco/orinoco_pci.c

+/* orinoco_pci.c
+ *
+ * Driver for Prism 2.5/3 devices that have a direct PCI interface
+ * (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge).
+ * The card contains only one PCI region, which contains all the usual
+ * hermes registers, as well as the COR register.
+ *
+ * Current maintainers are:
+ *      Pavel Roskin <proski AT gnu.org>
+ * and  David Gibson <hermes AT gibson.dropbear.id.au>
+ *
+ * Some of this code is borrowed from orinoco_plx.c
+ *      Copyright (C) 2001 Daniel Barlow <dan AT telent.net>
+ * Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
+ * has been copied from it. linux-wlan-ng-0.1.10 is originally :
+ *      Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
+ * This file originally written by:
+ *      Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com>
+ * And is now maintained by:
+ *      (C) Copyright David Gibson, IBM Corp. 2002-2003.
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License
+ * at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License version 2 (the "GPL"), in
+ * which case the provisions of the GPL are applicable instead of the
+ * above.  If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the MPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice and
+ * other provisions required by the GPL.  If you do not delete the
+ * provisions above, a recipient may use your version of this file
+ * under either the MPL or the GPL.
+ */
+
+#define DRIVER_NAME "orinoco_pci"
+#define PFX DRIVER_NAME ": "
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include "orinoco.h"
+#include "orinoco_pci.h"
+
+/* Offset of the COR register of the PCI card */
+#define HERMES_PCI_COR          (0x26)
+
+/* Bitmask to reset the card */
+#define HERMES_PCI_COR_MASK     (0x0080)
+
+/* Magic timeouts for doing the reset.
+ * Those times are straight from wlan-ng, and it is claimed that they
+ * are necessary. Alan will kill me. Take your time and grab a coffee. */
+#define HERMES_PCI_COR_ONT      (250)           /* ms */
+#define HERMES_PCI_COR_OFFT     (500)           /* ms */
+#define HERMES_PCI_COR_BUSYT    (500)           /* ms */
+
+/*
+ * Do a soft reset of the card using the Configuration Option Register
+ * We need this to get going...
+ * This is the part of the code that is strongly inspired from wlan-ng
+ *
+ * Note : This code is done with irq enabled. This mean that many
+ * interrupts will occur while we are there. This is why we use the
+ * jiffies to regulate time instead of a straight mdelay(). Usually we
+ * need only around 245 iteration of the loop to do 250 ms delay.
+ *
+ * Note bis : Don't try to access HERMES_CMD during the reset phase.
+ * It just won't work !
+ */
+static int orinoco_pci_cor_reset(struct orinoco_private *priv)
+{
+        hermes_t *hw = &priv->hw;
+        unsigned long timeout;
+        u16 reg;
+
+        /* Assert the reset until the card notices */
+        hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
+        mdelay(HERMES_PCI_COR_ONT);
+
+        /* Give time for the card to recover from this hard effort */
+        hermes_write_regn(hw, PCI_COR, 0x0000);
+        mdelay(HERMES_PCI_COR_OFFT);
+
+        /* The card is ready when it's no longer busy */
+        timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
+        reg = hermes_read_regn(hw, CMD);
+        while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
+                mdelay(1);
+                reg = hermes_read_regn(hw, CMD);
+        }
+
+        /* Still busy? */
+        if (reg & HERMES_CMD_BUSY) {
+                printk(KERN_ERR PFX "Busy timeout\n");
+                return -ETIMEDOUT;
+        }
+
+        return 0;
+}
+
+static int orinoco_pci_init_one(struct pci_dev *pdev,
+                                const struct pci_device_id *ent)
+{
+        int err;
+        struct orinoco_private *priv;
+        struct orinoco_pci_card *card;
+        void __iomem *hermes_io;
+
+        err = pci_enable_device(pdev);
+        if (err) {
+                printk(KERN_ERR PFX "Cannot enable PCI device\n");
+                return err;
+        }
+
+        err = pci_request_regions(pdev, DRIVER_NAME);
+        if (err) {
+                printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
+                goto fail_resources;
+        }
+
+        hermes_io = pci_iomap(pdev, 0, 0);
+        if (!hermes_io) {
+                printk(KERN_ERR PFX "Cannot remap chipset registers\n");
+                err = -EIO;
+                goto fail_map_hermes;
+        }
+
+        /* Allocate network device */
+        priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
+                                orinoco_pci_cor_reset, NULL);
+        if (!priv) {
+                printk(KERN_ERR PFX "Cannot allocate network device\n");
+                err = -ENOMEM;
+                goto fail_alloc;
+        }
+
+        card = priv->card;
+
+        hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING);
+
+        err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
+                          DRIVER_NAME, priv);
+        if (err) {
+                printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
+                err = -EBUSY;
+                goto fail_irq;
+        }
+
+        err = orinoco_pci_cor_reset(priv);
+        if (err) {
+                printk(KERN_ERR PFX "Initial reset failed\n");
+                goto fail;
+        }
+
+        err = orinoco_init(priv);
+        if (err) {
+                printk(KERN_ERR PFX "orinoco_init() failed\n");
+                goto fail;
+        }
+
+        err = orinoco_if_add(priv, 0, 0, NULL);
+        if (err) {
+                printk(KERN_ERR PFX "orinoco_if_add() failed\n");
+                goto fail;
+        }
+
+        pci_set_drvdata(pdev, priv);
+
+        return 0;
+
+ fail:
+        free_irq(pdev->irq, priv);
+
+ fail_irq:
+        pci_set_drvdata(pdev, NULL);
+        free_orinocodev(priv);
+
+ fail_alloc:
+        pci_iounmap(pdev, hermes_io);
+
+ fail_map_hermes:
+        pci_release_regions(pdev);
+
+ fail_resources:
+        pci_disable_device(pdev);
+
+        return err;
+}
+
+static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
+{
+        struct orinoco_private *priv = pci_get_drvdata(pdev);
+
+        orinoco_if_del(priv);
+        free_irq(pdev->irq, priv);
+        pci_set_drvdata(pdev, NULL);
+        free_orinocodev(priv);
+        pci_iounmap(pdev, priv->hw.iobase);
+        pci_release_regions(pdev);
+        pci_disable_device(pdev);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(orinoco_pci_id_table) = {
+        /* Intersil Prism 3 */
+        {0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
+        /* Intersil Prism 2.5 */
+        {0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
+        /* Samsung MagicLAN SWL-2210P */
+        {0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
+        {0,},
+};
+
+MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table);
+
+static struct pci_driver orinoco_pci_driver = {
+        .name           = DRIVER_NAME,
+        .id_table       = orinoco_pci_id_table,
+        .probe          = orinoco_pci_init_one,
+        .remove         = __devexit_p(orinoco_pci_remove_one),
+        .suspend        = orinoco_pci_suspend,
+        .resume         = orinoco_pci_resume,
+};
+
+static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
+        " (Pavel Roskin <proski@gnu.org>,"
+        " David Gibson <hermes@gibson.dropbear.id.au> &"
+        " Jean Tourrilhes <jt@hpl.hp.com>)";
+MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> &"
+              " David Gibson <hermes@gibson.dropbear.id.au>");
+MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
+MODULE_LICENSE("Dual MPL/GPL");
+
+static int __init orinoco_pci_init(void)
+{
+        printk(KERN_DEBUG "%s\n", version);
+        return pci_register_driver(&orinoco_pci_driver);
+}
+
+static void __exit orinoco_pci_exit(void)
+{
+        pci_unregister_driver(&orinoco_pci_driver);
+}
+
+module_init(orinoco_pci_init);
+module_exit(orinoco_pci_exit);
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ *  tab-width: 8
+ * End:
+ */