Update compat-wireless to 2.6.36-5-spn

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

+/*
+ * Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
+ * Symbol Wireless Networker LA4137, CompactFlash cards by Socket
+ * Communications and Intel PRO/Wireless 2011B.
+ *
+ * The driver implements Symbol firmware download.  The rest is handled
+ * in hermes.c and main.c.
+ *
+ * Utilities for downloading the Symbol firmware are available at
+ * http://sourceforge.net/projects/orinoco/
+ *
+ * Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
+ * Portions based on orinoco_cs.c:
+ *      Copyright (C) David Gibson, Linuxcare Australia
+ * Portions based on Spectrum24tDnld.c from original spectrum24 driver:
+ *      Copyright (C) Symbol Technologies.
+ *
+ * See copyright notice in file main.c.
+ */
+
+#define DRIVER_NAME "spectrum_cs"
+#define PFX DRIVER_NAME ": "
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+#include "orinoco.h"
+
+/********************************************************************/
+/* Module stuff                                                     */
+/********************************************************************/
+
+MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
+MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
+MODULE_LICENSE("Dual MPL/GPL");
+
+/* Module parameters */
+
+/* Some D-Link cards have buggy CIS. They do work at 5v properly, but
+ * don't have any CIS entry for it. This workaround it... */
+static int ignore_cis_vcc; /* = 0 */
+module_param(ignore_cis_vcc, int, 0);
+MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
+
+/********************************************************************/
+/* Data structures                                                  */
+/********************************************************************/
+
+/* PCMCIA specific device information (goes in the card field of
+ * struct orinoco_private */
+struct orinoco_pccard {
+        struct pcmcia_device    *p_dev;
+};
+
+/********************************************************************/
+/* Function prototypes                                              */
+/********************************************************************/
+
+static int spectrum_cs_config(struct pcmcia_device *link);
+static void spectrum_cs_release(struct pcmcia_device *link);
+
+/* Constants for the CISREG_CCSR register */
+#define HCR_RUN         0x07    /* run firmware after reset */
+#define HCR_IDLE        0x0E    /* don't run firmware after reset */
+#define HCR_MEM16       0x10    /* memory width bit, should be preserved */
+
+
+/*
+ * Reset the card using configuration registers COR and CCSR.
+ * If IDLE is 1, stop the firmware, so that it can be safely rewritten.
+ */
+static int
+spectrum_reset(struct pcmcia_device *link, int idle)
+{
+        int ret;
+        u8 save_cor;
+        u8 ccsr;
+
+        /* Doing it if hardware is gone is guaranteed crash */
+        if (!pcmcia_dev_present(link))
+                return -ENODEV;
+
+        /* Save original COR value */
+        ret = pcmcia_read_config_byte(link, CISREG_COR, &save_cor);
+        if (ret)
+                goto failed;
+
+        /* Soft-Reset card */
+        ret = pcmcia_write_config_byte(link, CISREG_COR,
+                                (save_cor | COR_SOFT_RESET));
+        if (ret)
+                goto failed;
+        udelay(1000);
+
+        /* Read CCSR */
+        ret = pcmcia_read_config_byte(link, CISREG_CCSR, &ccsr);
+        if (ret)
+                goto failed;
+
+        /*
+         * Start or stop the firmware.  Memory width bit should be
+         * preserved from the value we've just read.
+         */
+        ccsr = (idle ? HCR_IDLE : HCR_RUN) | (ccsr & HCR_MEM16);
+        ret = pcmcia_write_config_byte(link, CISREG_CCSR, ccsr);
+        if (ret)
+                goto failed;
+        udelay(1000);
+
+        /* Restore original COR configuration index */
+        ret = pcmcia_write_config_byte(link, CISREG_COR,
+                                (save_cor & ~COR_SOFT_RESET));
+        if (ret)
+                goto failed;
+        udelay(1000);
+        return 0;
+
+failed:
+        return -ENODEV;
+}
+
+/********************************************************************/
+/* Device methods                                                   */
+/********************************************************************/
+
+static int
+spectrum_cs_hard_reset(struct orinoco_private *priv)
+{
+        struct orinoco_pccard *card = priv->card;
+        struct pcmcia_device *link = card->p_dev;
+
+        /* Soft reset using COR and HCR */
+        spectrum_reset(link, 0);
+
+        return 0;
+}
+
+static int
+spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle)
+{
+        struct orinoco_pccard *card = priv->card;
+        struct pcmcia_device *link = card->p_dev;
+
+        return spectrum_reset(link, idle);
+}
+
+/********************************************************************/
+/* PCMCIA stuff                                                     */
+/********************************************************************/
+
+/*
+ * This creates an "instance" of the driver, allocating local data
+ * structures for one device.  The device is registered with Card
+ * Services.
+ *
+ * The dev_link structure is initialized, but we don't actually
+ * configure the card at this point -- we wait until we receive a card
+ * insertion event.  */
+static int
+spectrum_cs_probe(struct pcmcia_device *link)
+{
+        struct orinoco_private *priv;
+        struct orinoco_pccard *card;
+
+        priv = alloc_orinocodev(sizeof(*card), &link->dev,
+                                spectrum_cs_hard_reset,
+                                spectrum_cs_stop_firmware);
+        if (!priv)
+                return -ENOMEM;
+        card = priv->card;
+
+        /* Link both structures together */
+        card->p_dev = link;
+        link->priv = priv;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
+        /* Interrupt setup */
+        link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
+        link->irq.Handler = orinoco_interrupt;
+#endif
+
+        /* General socket configuration defaults can go here.  In this
+         * client, we assume very little, and rely on the CIS for
+         * almost everything.  In most clients, many details (i.e.,
+         * number, sizes, and attributes of IO windows) are fixed by
+         * the nature of the device, and can be hard-wired here. */
+        link->conf.Attributes = 0;
+        link->conf.IntType = INT_MEMORY_AND_IO;
+
+        return spectrum_cs_config(link);
+}                               /* spectrum_cs_attach */
+
+/*
+ * This deletes a driver "instance".  The device is de-registered with
+ * Card Services.  If it has been released, all local data structures
+ * are freed.  Otherwise, the structures will be freed when the device
+ * is released.
+ */
+static void spectrum_cs_detach(struct pcmcia_device *link)
+{
+        struct orinoco_private *priv = link->priv;
+
+        orinoco_if_del(priv);
+
+        spectrum_cs_release(link);
+
+        free_orinocodev(priv);
+}                               /* spectrum_cs_detach */
+
+/*
+ * spectrum_cs_config() is scheduled to run after a CARD_INSERTION
+ * event is received, to configure the PCMCIA socket, and to make the
+ * device available to the system.
+ */
+
+static int spectrum_cs_config_check(struct pcmcia_device *p_dev,
+                                    cistpl_cftable_entry_t *cfg,
+                                    cistpl_cftable_entry_t *dflt,
+                                    unsigned int vcc,
+                                    void *priv_data)
+{
+        if (cfg->index == 0)
+                goto next_entry;
+
+        /* Use power settings for Vcc and Vpp if present */
+        /* Note that the CIS values need to be rescaled */
+        if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
+                if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000) {
+                        DEBUG(2, "%s: Vcc mismatch (vcc = %d, CIS = %d)\n",
+                              __func__, vcc,
+                              cfg->vcc.param[CISTPL_POWER_VNOM] / 10000);
+                        if (!ignore_cis_vcc)
+                                goto next_entry;
+                }
+        } else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
+                if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000) {
+                        DEBUG(2, "%s: Vcc mismatch (vcc = %d, CIS = %d)\n",
+                              __func__, vcc,
+                              dflt->vcc.param[CISTPL_POWER_VNOM] / 10000);
+                        if (!ignore_cis_vcc)
+                                goto next_entry;
+                }
+        }
+
+        if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
+                p_dev->conf.Vpp =
+                        cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
+        else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
+                p_dev->conf.Vpp =
+                        dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;
+
+        /* Do we need to allocate an interrupt? */
+        p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
+
+        /* IO window settings */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+        p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
+#else
+        p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
+#endif
+        if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
+                cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+                p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
+                p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+                p_dev->resource[0]->flags |=
+                        pcmcia_io_cfg_data_width(io->flags);
+                p_dev->resource[0]->start = io->win[0].base;
+                p_dev->resource[0]->end = io->win[0].len;
+#else
+                p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
+                if (!(io->flags & CISTPL_IO_8BIT))
+                        p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
+                if (!(io->flags & CISTPL_IO_16BIT))
+                        p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+                p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
+                p_dev->io.BasePort1 = io->win[0].base;
+                p_dev->io.NumPorts1 = io->win[0].len;
+#endif
+                if (io->nwin > 1) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+                        p_dev->resource[1]->flags = p_dev->resource[0]->flags;
+                        p_dev->resource[1]->start = io->win[1].base;
+                        p_dev->resource[1]->end = io->win[1].len;
+#else
+                        p_dev->io.Attributes2 = p_dev->io.Attributes1;
+                        p_dev->io.BasePort2 = io->win[1].base;
+                        p_dev->io.NumPorts2 = io->win[1].len;
+#endif
+                }
+
+                /* This reserves IO space but doesn't actually enable it */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+                if (pcmcia_request_io(p_dev) != 0)
+#else
+                if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
+#endif
+                        goto next_entry;
+        }
+        return 0;
+
+next_entry:
+        pcmcia_disable_device(p_dev);
+        return -ENODEV;
+};
+
+static int
+spectrum_cs_config(struct pcmcia_device *link)
+{
+        struct orinoco_private *priv = link->priv;
+        hermes_t *hw = &priv->hw;
+        int ret;
+        void __iomem *mem;
+
+        /*
+         * In this loop, we scan the CIS for configuration table
+         * entries, each of which describes a valid card
+         * configuration, including voltage, IO window, memory window,
+         * and interrupt settings.
+         *
+         * We make no assumptions about the card to be configured: we
+         * use just the information available in the CIS.  In an ideal
+         * world, this would work for any PCMCIA card, but it requires
+         * a complete and accurate CIS.  In practice, a driver usually
+         * "knows" most of these things without consulting the CIS,
+         * and most client drivers will only use the CIS to fill in
+         * implementation-defined details.
+         */
+        ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL);
+        if (ret) {
+                if (!ignore_cis_vcc)
+                        printk(KERN_ERR PFX "GetNextTuple(): No matching "
+                               "CIS configuration.  Maybe you need the "
+                               "ignore_cis_vcc=1 parameter.\n");
+                goto failed;
+        }
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+        ret = pcmcia_request_irq(link, orinoco_interrupt);
+#else
+        ret = pcmcia_request_irq(link, &link->irq);
+#endif
+        if (ret)
+                goto failed;
+
+        /* We initialize the hermes structure before completing PCMCIA
+         * configuration just in case the interrupt handler gets
+         * called. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+        mem = ioport_map(link->resource[0]->start,
+                        resource_size(link->resource[0]));
+#else
+        mem = ioport_map(link->io.BasePort1, link->io.NumPorts1);
+#endif
+        if (!mem)
+                goto failed;
+
+        hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
+        hw->eeprom_pda = true;
+
+        /*
+         * This actually configures the PCMCIA socket -- setting up
+         * the I/O windows and the interrupt mapping, and putting the
+         * card and host interface into "Memory and IO" mode.
+         */
+        ret = pcmcia_request_configuration(link, &link->conf);
+        if (ret)
+                goto failed;
+
+        /* Reset card */
+        if (spectrum_cs_hard_reset(priv) != 0)
+                goto failed;
+
+        /* Initialise the main driver */
+        if (orinoco_init(priv) != 0) {
+                printk(KERN_ERR PFX "orinoco_init() failed\n");
+                goto failed;
+        }
+
+        /* Register an interface with the stack */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36))
+        if (orinoco_if_add(priv, link->resource[0]->start,
+                           link->irq, NULL) != 0) {
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+        if (orinoco_if_add(priv, link->io.BasePort1,
+                           link->irq, NULL) != 0) {
+#else
+        if (orinoco_if_add(priv, link->io.BasePort1,
+                           link->irq.AssignedIRQ, NULL) != 0) {
+#endif
+                printk(KERN_ERR PFX "orinoco_if_add() failed\n");
+                goto failed;
+        }
+
+        return 0;
+
+ failed:
+        spectrum_cs_release(link);
+        return -ENODEV;
+}                               /* spectrum_cs_config */
+
+/*
+ * After a card is removed, spectrum_cs_release() will unregister the
+ * device, and release the PCMCIA configuration.  If the device is
+ * still open, this will be postponed until it is closed.
+ */
+static void
+spectrum_cs_release(struct pcmcia_device *link)
+{
+        struct orinoco_private *priv = link->priv;
+        unsigned long flags;
+
+        /* We're committed to taking the device away now, so mark the
+         * hardware as unavailable */
+        priv->hw.ops->lock_irqsave(&priv->lock, &flags);
+        priv->hw_unavailable++;
+        priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
+
+        pcmcia_disable_device(link);
+        if (priv->hw.iobase)
+                ioport_unmap(priv->hw.iobase);
+}                               /* spectrum_cs_release */
+
+
+static int
+spectrum_cs_suspend(struct pcmcia_device *link)
+{
+        struct orinoco_private *priv = link->priv;
+        int err = 0;
+
+        /* Mark the device as stopped, to block IO until later */
+        orinoco_down(priv);
+
+        return err;
+}
+
+static int
+spectrum_cs_resume(struct pcmcia_device *link)
+{
+        struct orinoco_private *priv = link->priv;
+        int err = orinoco_up(priv);
+
+        return err;
+}
+
+
+/********************************************************************/
+/* Module initialization                                            */
+/********************************************************************/
+
+/* Can't be declared "const" or the whole __initdata section will
+ * become const */
+static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
+        " (Pavel Roskin <proski@gnu.org>,"
+        " David Gibson <hermes@gibson.dropbear.id.au>, et al)";
+
+static struct pcmcia_device_id spectrum_cs_ids[] = {
+        PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */
+        PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
+        PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */
+        PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
+
+static struct pcmcia_driver orinoco_driver = {
+        .owner          = THIS_MODULE,
+        .drv            = {
+                .name   = DRIVER_NAME,
+        },
+        .probe          = spectrum_cs_probe,
+        .remove         = spectrum_cs_detach,
+        .suspend        = spectrum_cs_suspend,
+        .resume         = spectrum_cs_resume,
+        .id_table       = spectrum_cs_ids,
+};
+
+static int __init
+init_spectrum_cs(void)
+{
+        printk(KERN_DEBUG "%s\n", version);
+
+        return pcmcia_register_driver(&orinoco_driver);
+}
+
+static void __exit
+exit_spectrum_cs(void)
+{
+        pcmcia_unregister_driver(&orinoco_driver);
+}
+
+module_init(init_spectrum_cs);
+module_exit(exit_spectrum_cs);