[PATCH] orinoco: New driver - spectrum_cs.

Signed-off-by: Pavel Roskin <proski@gnu.org>

diff-tree dee4f325520d4ea29397dd67ca657b7235bb1790 (from c88faac230cc9775445e5c644991c352e35c72a1)
Author: Pavel Roskin <proski@gnu.org>
Date:   Thu Sep 1 17:46:39 2005 -0400

    New driver - spectrum_cs.

    Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
    Symbol Wireless Networker LA4100, CompactFlash cards by Socket
    Communications and Intel PRO/Wireless 2011B.

    The driver implements Symbol firmware download.  The rest is handled
    in hermes.c and orinoco.c.

    Utilities for downloading the Symbol firmware are available at
    http://sourceforge.net/projects/orinoco/
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

3 files changed, 1134 insertions, 0 deletions

diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index ae7c876d647..00a07f32a81 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -375,6 +375,19 @@ config PCMCIA_HERMES
 	  configure your card and that /etc/pcmcia/wireless.opts works:
 	  <http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html>.
 
+config PCMCIA_SPECTRUM
+	tristate "Symbol Spectrum24 Trilogy PCMCIA card support"
+	depends on NET_RADIO && PCMCIA && HERMES
+	---help---
+
+	  This is a driver for 802.11b cards using RAM-loadable Symbol
+	  firmware, such as Symbol Wireless Networker LA4100, CompactFlash
+	  cards by Socket Communications and Intel PRO/Wireless 2011B.
+
+	  This driver requires firmware download on startup.  Utilities
+	  for downloading Symbol firmware are available at
+	  <http://sourceforge.net/projects/orinoco/>
+
 config AIRO_CS
 	tristate "Cisco/Aironet 34X/35X/4500/4800 PCMCIA cards"
 	depends on NET_RADIO && PCMCIA && (BROKEN || !M32R)
diff --git a/drivers/net/wireless/Makefile b/drivers/net/wireless/Makefile
index d2c8ccc2146..3a6f7ba326c 100644
--- a/drivers/net/wireless/Makefile
+++ b/drivers/net/wireless/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_PLX_HERMES)	+= orinoco_plx.o
 obj-$(CONFIG_PCI_HERMES)	+= orinoco_pci.o
 obj-$(CONFIG_TMD_HERMES)	+= orinoco_tmd.o
 obj-$(CONFIG_NORTEL_HERMES)	+= orinoco_nortel.o
+obj-$(CONFIG_PCMCIA_SPECTRUM)	+= spectrum_cs.o
 
 obj-$(CONFIG_AIRO)		+= airo.o
 obj-$(CONFIG_AIRO_CS)		+= airo_cs.o airo.o
diff --git a/drivers/net/wireless/spectrum_cs.c b/drivers/net/wireless/spectrum_cs.c
new file mode 100644
index 00000000000..39c6cdf7f3f
--- /dev/null
+++ b/drivers/net/wireless/spectrum_cs.c
@@ -0,0 +1,1120 @@
+/*
+ * Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
+ * Symbol Wireless Networker LA4100, CompactFlash cards by Socket
+ * Communications and Intel PRO/Wireless 2011B.
+ *
+ * The driver implements Symbol firmware download.  The rest is handled
+ * in hermes.c and orinoco.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 orinoco.c.
+ */
+
+#define DRIVER_NAME "spectrum_cs"
+#define PFX DRIVER_NAME ": "
+
+#include <linux/config.h>
+#ifdef  __IN_PCMCIA_PACKAGE__
+#include <pcmcia/k_compat.h>
+#endif /* __IN_PCMCIA_PACKAGE__ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/wireless.h>
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include "orinoco.h"
+
+/*
+ * If SPECTRUM_FW_INCLUDED is defined, the firmware is hardcoded into
+ * the driver.  Use get_symbol_fw script to generate spectrum_fw.h and
+ * copy it to the same directory as spectrum_cs.c.
+ *
+ * If SPECTRUM_FW_INCLUDED is not defined, the firmware is loaded at the
+ * runtime using hotplug.  Use the same get_symbol_fw script to generate
+ * files symbol_sp24t_prim_fw symbol_sp24t_sec_fw, copy them to the
+ * hotplug firmware directory (typically /usr/lib/hotplug/firmware) and
+ * make sure that you have hotplug installed and enabled in the kernel.
+ */
+/* #define SPECTRUM_FW_INCLUDED 1 */
+
+#ifdef SPECTRUM_FW_INCLUDED
+/* Header with the firmware */
+#include "spectrum_fw.h"
+#else	/* !SPECTRUM_FW_INCLUDED */
+#include <linux/firmware.h>
+static unsigned char *primsym;
+static unsigned char *secsym;
+static const char primary_fw_name[] = "symbol_sp24t_prim_fw";
+static const char secondary_fw_name[] = "symbol_sp24t_sec_fw";
+#endif	/* !SPECTRUM_FW_INCLUDED */
+
+/********************************************************************/
+/* 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");
+
+/********************************************************************/
+/* Magic constants						    */
+/********************************************************************/
+
+/*
+ * The dev_info variable is the "key" that is used to match up this
+ * device driver with appropriate cards, through the card
+ * configuration database.
+ */
+static dev_info_t dev_info = DRIVER_NAME;
+
+/********************************************************************/
+/* Data structures						    */
+/********************************************************************/
+
+/* PCMCIA specific device information (goes in the card field of
+ * struct orinoco_private */
+struct orinoco_pccard {
+	dev_link_t link;
+	dev_node_t node;
+};
+
+/*
+ * A linked list of "instances" of the device.  Each actual PCMCIA
+ * card corresponds to one device instance, and is described by one
+ * dev_link_t structure (defined in ds.h).
+ */
+static dev_link_t *dev_list; /* = NULL */
+
+/********************************************************************/
+/* Function prototypes						    */
+/********************************************************************/
+
+/* device methods */
+static int spectrum_cs_hard_reset(struct orinoco_private *priv);
+
+/* PCMCIA gumpf */
+static void spectrum_cs_config(dev_link_t * link);
+static void spectrum_cs_release(dev_link_t * link);
+static int spectrum_cs_event(event_t event, int priority,
+			    event_callback_args_t * args);
+
+static dev_link_t *spectrum_cs_attach(void);
+static void spectrum_cs_detach(dev_link_t *);
+
+/********************************************************************/
+/* Firmware downloader						    */
+/********************************************************************/
+
+/* Position of PDA in the adapter memory */
+#define EEPROM_ADDR	0x3000
+#define EEPROM_LEN	0x200
+#define PDA_OFFSET	0x100
+
+#define PDA_ADDR	(EEPROM_ADDR + PDA_OFFSET)
+#define PDA_WORDS	((EEPROM_LEN - PDA_OFFSET) / 2)
+
+/* 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 */
+
+/*
+ * AUX port access.  To unlock the AUX port write the access keys to the
+ * PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL
+ * register.  Then read it and make sure it's HERMES_AUX_ENABLED.
+ */
+#define HERMES_AUX_ENABLE	0x8000	/* Enable auxiliary port access */
+#define HERMES_AUX_DISABLE	0x4000	/* Disable to auxiliary port access */
+#define HERMES_AUX_ENABLED	0xC000	/* Auxiliary port is open */
+
+#define HERMES_AUX_PW0	0xFE01
+#define HERMES_AUX_PW1	0xDC23
+#define HERMES_AUX_PW2	0xBA45
+
+/* End markers */
+#define PDI_END		0x00000000	/* End of PDA */
+#define BLOCK_END	0xFFFFFFFF	/* Last image block */
+#define TEXT_END	0x1A		/* End of text header */
+
+/*
+ * The following structures have little-endian fields denoted by
+ * the leading underscore.  Don't access them directly - use inline
+ * functions defined below.
+ */
+
+/*
+ * The binary image to be downloaded consists of series of data blocks.
+ * Each block has the following structure.
+ */
+struct dblock {
+	u32 _addr;		/* adapter address where to write the block */
+	u16 _len;		/* length of the data only, in bytes */
+	char data[0];		/* data to be written */
+} __attribute__ ((packed));
+
+/*
+ * Plug Data References are located in in the image after the last data
+ * block.  They refer to areas in the adapter memory where the plug data
+ * items with matching ID should be written.
+ */
+struct pdr {
+	u32 _id;		/* record ID */
+	u32 _addr;		/* adapter address where to write the data */
+	u32 _len;		/* expected length of the data, in bytes */
+	char next[0];		/* next PDR starts here */
+} __attribute__ ((packed));
+
+
+/*
+ * Plug Data Items are located in the EEPROM read from the adapter by
+ * primary firmware.  They refer to the device-specific data that should
+ * be plugged into the secondary firmware.
+ */
+struct pdi {
+	u16 _len;		/* length of ID and data, in words */
+	u16 _id;		/* record ID */
+	char data[0];		/* plug data */
+} __attribute__ ((packed));;
+
+
+/* Functions for access to little-endian data */
+static inline u32
+dblock_addr(const struct dblock *blk)
+{
+	return le32_to_cpu(blk->_addr);
+}
+
+static inline u32
+dblock_len(const struct dblock *blk)
+{
+	return le16_to_cpu(blk->_len);
+}
+
+static inline u32
+pdr_id(const struct pdr *pdr)
+{
+	return le32_to_cpu(pdr->_id);
+}
+
+static inline u32
+pdr_addr(const struct pdr *pdr)
+{
+	return le32_to_cpu(pdr->_addr);
+}
+
+static inline u32
+pdr_len(const struct pdr *pdr)
+{
+	return le32_to_cpu(pdr->_len);
+}
+
+static inline u32
+pdi_id(const struct pdi *pdi)
+{
+	return le16_to_cpu(pdi->_id);
+}
+
+/* Return length of the data only, in bytes */
+static inline u32
+pdi_len(const struct pdi *pdi)
+{
+	return 2 * (le16_to_cpu(pdi->_len) - 1);
+}
+
+
+/* Set address of the auxiliary port */
+static inline void
+spectrum_aux_setaddr(hermes_t *hw, u32 addr)
+{
+	hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7));
+	hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F));
+}
+
+
+/* Open access to the auxiliary port */
+static int
+spectrum_aux_open(hermes_t *hw)
+{
+	int i;
+
+	/* Already open? */
+	if (hermes_read_reg(hw, HERMES_CONTROL) == HERMES_AUX_ENABLED)
+		return 0;
+
+	hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0);
+	hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1);
+	hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2);
+	hermes_write_reg(hw, HERMES_CONTROL, HERMES_AUX_ENABLE);
+
+	for (i = 0; i < 20; i++) {
+		udelay(10);
+		if (hermes_read_reg(hw, HERMES_CONTROL) ==
+		    HERMES_AUX_ENABLED)
+			return 0;
+	}
+
+	return -EBUSY;
+}
+
+
+#define CS_CHECK(fn, ret) \
+  do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
+
+/*
+ * 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(dev_link_t *link, int idle)
+{
+	int last_ret, last_fn;
+	conf_reg_t reg;
+	u_int save_cor;
+
+	/* Doing it if hardware is gone is guaranteed crash */
+	if (!(link->state & DEV_CONFIG))
+		return -ENODEV;
+
+	/* Save original COR value */
+	reg.Function = 0;
+	reg.Action = CS_READ;
+	reg.Offset = CISREG_COR;
+	CS_CHECK(AccessConfigurationRegister,
+		 pcmcia_access_configuration_register(link->handle, &reg));
+	save_cor = reg.Value;
+
+	/* Soft-Reset card */
+	reg.Action = CS_WRITE;
+	reg.Offset = CISREG_COR;
+	reg.Value = (save_cor | COR_SOFT_RESET);
+	CS_CHECK(AccessConfigurationRegister,
+		 pcmcia_access_configuration_register(link->handle, &reg));
+	udelay(1000);
+
+	/* Read CCSR */
+	reg.Action = CS_READ;
+	reg.Offset = CISREG_CCSR;
+	CS_CHECK(AccessConfigurationRegister,
+		 pcmcia_access_configuration_register(link->handle, &reg));
+
+	/*
+	 * Start or stop the firmware.  Memory width bit should be
+	 * preserved from the value we've just read.
+	 */
+	reg.Action = CS_WRITE;
+	reg.Offset = CISREG_CCSR;
+	reg.Value = (idle ? HCR_IDLE : HCR_RUN) | (reg.Value & HCR_MEM16);
+	CS_CHECK(AccessConfigurationRegister,
+		 pcmcia_access_configuration_register(link->handle, &reg));
+	udelay(1000);
+
+	/* Restore original COR configuration index */
+	reg.Action = CS_WRITE;
+	reg.Offset = CISREG_COR;
+	reg.Value = (save_cor & ~COR_SOFT_RESET);
+	CS_CHECK(AccessConfigurationRegister,
+		 pcmcia_access_configuration_register(link->handle, &reg));
+	udelay(1000);
+	return 0;
+
+      cs_failed:
+	cs_error(link->handle, last_fn, last_ret);
+	return -ENODEV;
+}
+
+
+/*
+ * Scan PDR for the record with the specified RECORD_ID.
+ * If it's not found, return NULL.
+ */
+static struct pdr *
+spectrum_find_pdr(struct pdr *first_pdr, u32 record_id)
+{
+	struct pdr *pdr = first_pdr;
+
+	while (pdr_id(pdr) != PDI_END) {
+		/*
+		 * PDR area is currently not terminated by PDI_END.
+		 * It's followed by CRC records, which have the type
+		 * field where PDR has length.  The type can be 0 or 1.
+		 */
+		if (pdr_len(pdr) < 2)
+			return NULL;
+
+		/* If the record ID matches, we are done */
+		if (pdr_id(pdr) == record_id)
+			return pdr;
+
+		pdr = (struct pdr *) pdr->next;
+	}
+	return NULL;
+}
+
+
+/* Process one Plug Data Item - find corresponding PDR and plug it */
+static int
+spectrum_plug_pdi(hermes_t *hw, struct pdr *first_pdr, struct pdi *pdi)
+{
+	struct pdr *pdr;
+
+	/* Find the PDI corresponding to this PDR */
+	pdr = spectrum_find_pdr(first_pdr, pdi_id(pdi));
+
+	/* No match is found, safe to ignore */
+	if (!pdr)
+		return 0;
+
+	/* Lengths of the data in PDI and PDR must match */
+	if (pdi_len(pdi) != pdr_len(pdr))
+		return -EINVAL;
+
+	/* do the actual plugging */
+	spectrum_aux_setaddr(hw, pdr_addr(pdr));
+	hermes_write_words(hw, HERMES_AUXDATA, pdi->data,
+			   pdi_len(pdi) / 2);
+
+	return 0;
+}
+
+
+/* Read PDA from the adapter */
+static int
+spectrum_read_pda(hermes_t *hw, u16 *pda, int pda_len)
+{
+	int ret;
+	int pda_size;
+
+	/* Issue command to read EEPROM */
+	ret = hermes_docmd_wait(hw, HERMES_CMD_READMIF, 0, NULL);
+	if (ret)
+		return ret;
+
+	/* Open auxiliary port */
+	ret = spectrum_aux_open(hw);
+	if (ret)
+		return ret;
+
+	/* read PDA from EEPROM */
+	spectrum_aux_setaddr(hw, PDA_ADDR);
+	hermes_read_words(hw, HERMES_AUXDATA, pda, pda_len / 2);
+
+	/* Check PDA length */
+	pda_size = le16_to_cpu(pda[0]);
+	if (pda_size > pda_len)
+		return -EINVAL;
+
+	return 0;
+}
+
+
+/* Parse PDA and write the records into the adapter */
+static int
+spectrum_apply_pda(hermes_t *hw, const struct dblock *first_block,
+		   u16 *pda)
+{
+	int ret;
+	struct pdi *pdi;
+	struct pdr *first_pdr;
+	const struct dblock *blk = first_block;
+
+	/* Skip all blocks to locate Plug Data References */
+	while (dblock_addr(blk) != BLOCK_END)
+		blk = (struct dblock *) &blk->data[dblock_len(blk)];
+
+	first_pdr = (struct pdr *) blk;
+
+	/* Go through every PDI and plug them into the adapter */
+	pdi = (struct pdi *) (pda + 2);
+	while (pdi_id(pdi) != PDI_END) {
+		ret = spectrum_plug_pdi(hw, first_pdr, pdi);
+		if (ret)
+			return ret;
+
+		/* Increment to the next PDI */
+		pdi = (struct pdi *) &pdi->data[pdi_len(pdi)];
+	}
+	return 0;
+}
+
+
+/* Load firmware blocks into the adapter */
+static int
+spectrum_load_blocks(hermes_t *hw, const struct dblock *first_block)
+{
+	const struct dblock *blk;
+	u32 blkaddr;
+	u32 blklen;
+
+	blk = first_block;
+	blkaddr = dblock_addr(blk);
+	blklen = dblock_len(blk);
+
+	while (dblock_addr(blk) != BLOCK_END) {
+		spectrum_aux_setaddr(hw, blkaddr);
+		hermes_write_words(hw, HERMES_AUXDATA, blk->data,
+				   blklen / 2);
+
+		blk = (struct dblock *) &blk->data[blklen];
+		blkaddr = dblock_addr(blk);
+		blklen = dblock_len(blk);
+	}
+	return 0;
+}
+
+
+/*
+ * Process a firmware image - stop the card, load the firmware, reset
+ * the card and make sure it responds.  For the secondary firmware take
+ * care of the PDA - read it and then write it on top of the firmware.
+ */
+static int
+spectrum_dl_image(hermes_t *hw, dev_link_t *link,
+		  const unsigned char *image)
+{
+	int ret;
+	const unsigned char *ptr;
+	const struct dblock *first_block;
+
+	/* Plug Data Area (PDA) */
+	u16 pda[PDA_WORDS];
+
+	/* Binary block begins after the 0x1A marker */
+	ptr = image;
+	while (*ptr++ != TEXT_END);
+	first_block = (const struct dblock *) ptr;
+
+	/* Read the PDA */
+	if (image != primsym) {
+		ret = spectrum_read_pda(hw, pda, sizeof(pda));
+		if (ret)
+			return ret;
+	}
+
+	/* Stop the firmware, so that it can be safely rewritten */
+	ret = spectrum_reset(link, 1);
+	if (ret)
+		return ret;
+
+	/* Program the adapter with new firmware */
+	ret = spectrum_load_blocks(hw, first_block);
+	if (ret)
+		return ret;
+
+	/* Write the PDA to the adapter */
+	if (image != primsym) {
+		ret = spectrum_apply_pda(hw, first_block, pda);
+		if (ret)
+			return ret;
+	}
+
+	/* Run the firmware */
+	ret = spectrum_reset(link, 0);
+	if (ret)
+		return ret;
+
+	/* Reset hermes chip and make sure it responds */
+	ret = hermes_init(hw);
+
+	/* hermes_reset() should return 0 with the secondary firmware */
+	if (image != primsym && ret != 0)
+		return -ENODEV;
+
+	/* And this should work with any firmware */
+	if (!hermes_present(hw))
+		return -ENODEV;
+
+	return 0;
+}
+
+
+/*
+ * Download the firmware into the card, this also does a PCMCIA soft
+ * reset on the card, to make sure it's in a sane state.
+ */
+static int
+spectrum_dl_firmware(hermes_t *hw, dev_link_t *link)
+{
+	int ret;
+	client_handle_t handle = link->handle;
+
+#ifndef SPECTRUM_FW_INCLUDED
+	const struct firmware *fw_entry;
+
+	if (request_firmware(&fw_entry, primary_fw_name,
+			     &handle_to_dev(handle)) == 0) {
+		primsym = fw_entry->data;
+	} else {
+		printk(KERN_ERR PFX "Cannot find firmware: %s\n",
+		       primary_fw_name);
+		return -ENOENT;
+	}
+
+	if (request_firmware(&fw_entry, secondary_fw_name,
+			     &handle_to_dev(handle)) == 0) {
+		secsym = fw_entry->data;
+	} else {
+		printk(KERN_ERR PFX "Cannot find firmware: %s\n",
+		       secondary_fw_name);
+		return -ENOENT;
+	}
+#endif
+
+	/* Load primary firmware */
+	ret = spectrum_dl_image(hw, link, primsym);
+	if (ret) {
+		printk(KERN_ERR PFX "Primary firmware download failed\n");
+		return ret;
+	}
+
+	/* Load secondary firmware */
+	ret = spectrum_dl_image(hw, link, secsym);
+
+	if (ret) {
+		printk(KERN_ERR PFX "Secondary firmware download failed\n");
+	}
+
+	return ret;
+}
+
+/********************************************************************/
+/* Device methods     						    */
+/********************************************************************/
+
+static int
+spectrum_cs_hard_reset(struct orinoco_private *priv)
+{
+	struct orinoco_pccard *card = priv->card;
+	dev_link_t *link = &card->link;
+	int err;
+
+	if (!hermes_present(&priv->hw)) {
+		/* The firmware needs to be reloaded */
+		if (spectrum_dl_firmware(&priv->hw, &card->link) != 0) {
+			printk(KERN_ERR PFX "Firmware download failed\n");
+			err = -ENODEV;
+		}
+	} else {
+		/* Soft reset using COR and HCR */
+		spectrum_reset(link, 0);
+	}
+
+	return 0;
+}
+
+/********************************************************************/
+/* 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 dev_link_t *
+spectrum_cs_attach(void)
+{
+	struct net_device *dev;
+	struct orinoco_private *priv;
+	struct orinoco_pccard *card;
+	dev_link_t *link;
+	client_reg_t client_reg;
+	int ret;
+
+	dev = alloc_orinocodev(sizeof(*card), spectrum_cs_hard_reset);
+	if (! dev)
+		return NULL;
+	priv = netdev_priv(dev);
+	card = priv->card;
+
+	/* Link both structures together */
+	link = &card->link;
+	link->priv = dev;
+
+	/* Interrupt setup */
+	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
+	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
+	link->irq.Handler = orinoco_interrupt;
+	link->irq.Instance = dev; 
+
+	/* 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;
+
+	/* Register with Card Services */
+	/* FIXME: need a lock? */
+	link->next = dev_list;
+	dev_list = link;
+
+	client_reg.dev_info = &dev_info;
+	client_reg.Version = 0x0210; /* FIXME: what does this mean? */
+	client_reg.event_callback_args.client_data = link;
+
+	ret = pcmcia_register_client(&link->handle, &client_reg);
+	if (ret != CS_SUCCESS) {
+		cs_error(link->handle, RegisterClient, ret);
+		spectrum_cs_detach(link);
+		return NULL;
+	}
+
+	return 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(dev_link_t *link)
+{
+	dev_link_t **linkp;
+	struct net_device *dev = link->priv;
+
+	/* Locate device structure */
+	for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+		if (*linkp == link)
+			break;
+
+	BUG_ON(*linkp == NULL);
+
+	if (link->state & DEV_CONFIG)
+		spectrum_cs_release(link);
+
+	/* Break the link with Card Services */
+	if (link->handle)
+		pcmcia_deregister_client(link->handle);
+
+	/* Unlink device structure, and free it */
+	*linkp = link->next;
+	DEBUG(0, PFX "detach: link=%p link->dev=%p\n", link, link->dev);
+	if (link->dev) {
+		DEBUG(0, PFX "About to unregister net device %p\n",
+		      dev);
+		unregister_netdev(dev);
+	}
+	free_orinocodev(dev);
+}				/* 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 void
+spectrum_cs_config(dev_link_t *link)
+{
+	struct net_device *dev = link->priv;
+	client_handle_t handle = link->handle;
+	struct orinoco_private *priv = netdev_priv(dev);
+	struct orinoco_pccard *card = priv->card;
+	hermes_t *hw = &priv->hw;
+	int last_fn, last_ret;
+	u_char buf[64];
+	config_info_t conf;
+	cisinfo_t info;
+	tuple_t tuple;
+	cisparse_t parse;
+	void __iomem *mem;
+
+	CS_CHECK(ValidateCIS, pcmcia_validate_cis(handle, &info));
+
+	/*
+	 * This reads the card's CONFIG tuple to find its
+	 * configuration registers.
+	 */
+	tuple.DesiredTuple = CISTPL_CONFIG;
+	tuple.Attributes = 0;
+	tuple.TupleData = buf;
+	tuple.TupleDataMax = sizeof(buf);
+	tuple.TupleOffset = 0;
+	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+	CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+	CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+	link->conf.ConfigBase = parse.config.base;
+	link->conf.Present = parse.config.rmask[0];
+
+	/* Configure card */
+	link->state |= DEV_CONFIG;
+
+	/* Look up the current Vcc */
+	CS_CHECK(GetConfigurationInfo,
+		 pcmcia_get_configuration_info(handle, &conf));
+	link->conf.Vcc = conf.Vcc;
+
+	/*
+	 * 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.
+	 */
+	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+	while (1) {
+		cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
+		cistpl_cftable_entry_t dflt = { .index = 0 };
+
+		if ( (pcmcia_get_tuple_data(handle, &tuple) != 0)
+		    || (pcmcia_parse_tuple(handle, &tuple, &parse) != 0))
+			goto next_entry;
+
+		if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
+			dflt = *cfg;
+		if (cfg->index == 0)
+			goto next_entry;
+		link->conf.ConfigIndex = cfg->index;
+
+		/* Does this card need audio output? */
+		if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
+			link->conf.Attributes |= CONF_ENABLE_SPKR;
+			link->conf.Status = CCSR_AUDIO_ENA;
+		}
+
+		/* 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 (conf.Vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000) {
+				DEBUG(2, "spectrum_cs_config: Vcc mismatch (conf.Vcc = %d, CIS = %d)\n",  conf.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 (conf.Vcc != dflt.vcc.param[CISTPL_POWER_VNOM] / 10000) {
+				DEBUG(2, "spectrum_cs_config: Vcc mismatch (conf.Vcc = %d, CIS = %d)\n",  conf.Vcc, dflt.vcc.param[CISTPL_POWER_VNOM] / 10000);
+				if(!ignore_cis_vcc)
+					goto next_entry;
+			}
+		}
+
+		if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
+			link->conf.Vpp1 = link->conf.Vpp2 =
+			    cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
+		else if (dflt.vpp1.present & (1 << CISTPL_POWER_VNOM))
+			link->conf.Vpp1 = link->conf.Vpp2 =
+			    dflt.vpp1.param[CISTPL_POWER_VNOM] / 10000;
+		
+		/* Do we need to allocate an interrupt? */
+		link->conf.Attributes |= CONF_ENABLE_IRQ;
+
+		/* IO window settings */
+		link->io.NumPorts1 = link->io.NumPorts2 = 0;
+		if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
+			cistpl_io_t *io =
+			    (cfg->io.nwin) ? &cfg->io : &dflt.io;
+			link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
+			if (!(io->flags & CISTPL_IO_8BIT))
+				link->io.Attributes1 =
+				    IO_DATA_PATH_WIDTH_16;
+			if (!(io->flags & CISTPL_IO_16BIT))
+				link->io.Attributes1 =
+				    IO_DATA_PATH_WIDTH_8;
+			link->io.IOAddrLines =
+			    io->flags & CISTPL_IO_LINES_MASK;
+			link->io.BasePort1 = io->win[0].base;
+			link->io.NumPorts1 = io->win[0].len;
+			if (io->nwin > 1) {
+				link->io.Attributes2 =
+				    link->io.Attributes1;
+				link->io.BasePort2 = io->win[1].base;
+				link->io.NumPorts2 = io->win[1].len;
+			}
+
+			/* This reserves IO space but doesn't actually enable it */
+			if (pcmcia_request_io(link->handle, &link->io) != 0)
+				goto next_entry;
+		}
+
+
+		/* If we got this far, we're cool! */
+
+		break;
+		
+	next_entry:
+		if (link->io.NumPorts1)
+			pcmcia_release_io(link->handle, &link->io);
+		last_ret = pcmcia_get_next_tuple(handle, &tuple);
+		if (last_ret  == CS_NO_MORE_ITEMS) {
+			printk(KERN_ERR PFX "GetNextTuple(): No matching "
+			       "CIS configuration.  Maybe you need the "
+			       "ignore_cis_vcc=1 parameter.\n");
+			goto cs_failed;
+		}
+	}
+
+	/*
+	 * Allocate an interrupt line.  Note that this does not assign
+	 * a handler to the interrupt, unless the 'Handler' member of
+	 * the irq structure is initialized.
+	 */
+	CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
+
+	/* We initialize the hermes structure before completing PCMCIA
+	 * configuration just in case the interrupt handler gets
+	 * called. */
+	mem = ioport_map(link->io.BasePort1, link->io.NumPorts1);
+	if (!mem)
+		goto cs_failed;
+
+	hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
+
+	/*
+	 * 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.
+	 */
+	CS_CHECK(RequestConfiguration,
+		 pcmcia_request_configuration(link->handle, &link->conf));
+
+	/* Ok, we have the configuration, prepare to register the netdev */
+	dev->base_addr = link->io.BasePort1;
+	dev->irq = link->irq.AssignedIRQ;
+	SET_MODULE_OWNER(dev);
+	card->node.major = card->node.minor = 0;
+
+	/* Reset card and download firmware */
+	if (spectrum_cs_hard_reset(priv) != 0) {
+		goto failed;
+	}
+
+	SET_NETDEV_DEV(dev, &handle_to_dev(handle));
+	/* Tell the stack we exist */
+	if (register_netdev(dev) != 0) {
+		printk(KERN_ERR PFX "register_netdev() failed\n");
+		goto failed;
+	}
+
+	/* At this point, the dev_node_t structure(s) needs to be
+	 * initialized and arranged in a linked list at link->dev. */
+	strcpy(card->node.dev_name, dev->name);
+	link->dev = &card->node; /* link->dev being non-NULL is also
+                                    used to indicate that the
+                                    net_device has been registered */
+	link->state &= ~DEV_CONFIG_PENDING;
+
+	/* Finally, report what we've done */
+	printk(KERN_DEBUG "%s: index 0x%02x: Vcc %d.%d",
+	       dev->name, link->conf.ConfigIndex,
+	       link->conf.Vcc / 10, link->conf.Vcc % 10);
+	if (link->conf.Vpp1)
+		printk(", Vpp %d.%d", link->conf.Vpp1 / 10,
+		       link->conf.Vpp1 % 10);
+	printk(", irq %d", link->irq.AssignedIRQ);
+	if (link->io.NumPorts1)
+		printk(", io 0x%04x-0x%04x", link->io.BasePort1,
+		       link->io.BasePort1 + link->io.NumPorts1 - 1);
+	if (link->io.NumPorts2)
+		printk(" & 0x%04x-0x%04x", link->io.BasePort2,
+		       link->io.BasePort2 + link->io.NumPorts2 - 1);
+	printk("\n");
+
+	return;
+
+ cs_failed:
+	cs_error(link->handle, last_fn, last_ret);
+
+ failed:
+	spectrum_cs_release(link);
+}				/* 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(dev_link_t *link)
+{
+	struct net_device *dev = link->priv;
+	struct orinoco_private *priv = netdev_priv(dev);
+	unsigned long flags;
+
+	/* We're committed to taking the device away now, so mark the
+	 * hardware as unavailable */
+	spin_lock_irqsave(&priv->lock, flags);
+	priv->hw_unavailable++;
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	/* Don't bother checking to see if these succeed or not */
+	pcmcia_release_configuration(link->handle);
+	if (link->io.NumPorts1)
+		pcmcia_release_io(link->handle, &link->io);
+	if (link->irq.AssignedIRQ)
+		pcmcia_release_irq(link->handle, &link->irq);
+	link->state &= ~DEV_CONFIG;
+	if (priv->hw.iobase)
+		ioport_unmap(priv->hw.iobase);
+}				/* spectrum_cs_release */
+
+/*
+ * The card status event handler.  Mostly, this schedules other stuff
+ * to run after an event is received.
+ */
+static int
+spectrum_cs_event(event_t event, int priority,
+		       event_callback_args_t * args)
+{
+	dev_link_t *link = args->client_data;
+	struct net_device *dev = link->priv;
+	struct orinoco_private *priv = netdev_priv(dev);
+	int err = 0;
+	unsigned long flags;
+
+	switch (event) {
+	case CS_EVENT_CARD_REMOVAL:
+		link->state &= ~DEV_PRESENT;
+		if (link->state & DEV_CONFIG) {
+			unsigned long flags;
+
+			spin_lock_irqsave(&priv->lock, flags);
+			netif_device_detach(dev);
+			priv->hw_unavailable++;
+			spin_unlock_irqrestore(&priv->lock, flags);
+		}
+		break;
+
+	case CS_EVENT_CARD_INSERTION:
+		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+		spectrum_cs_config(link);
+		break;
+
+	case CS_EVENT_PM_SUSPEND:
+		link->state |= DEV_SUSPEND;
+		/* Fall through... */
+	case CS_EVENT_RESET_PHYSICAL:
+		/* Mark the device as stopped, to block IO until later */
+		if (link->state & DEV_CONFIG) {
+			/* This is probably racy, but I can't think of
+                           a better way, short of rewriting the PCMCIA
+                           layer to not suck :-( */
+			spin_lock_irqsave(&priv->lock, flags);
+
+			err = __orinoco_down(dev);
+			if (err)
+				printk(KERN_WARNING "%s: %s: Error %d downing interface\n",
+				       dev->name,
+				       event == CS_EVENT_PM_SUSPEND ? "SUSPEND" : "RESET_PHYSICAL",
+				       err);
+
+			netif_device_detach(dev);
+			priv->hw_unavailable++;
+
+			spin_unlock_irqrestore(&priv->lock, flags);
+
+			pcmcia_release_configuration(link->handle);
+		}
+		break;
+
+	case CS_EVENT_PM_RESUME:
+		link->state &= ~DEV_SUSPEND;
+		/* Fall through... */
+	case CS_EVENT_CARD_RESET:
+		if (link->state & DEV_CONFIG) {
+			/* FIXME: should we double check that this is
+			 * the same card as we had before */
+			pcmcia_request_configuration(link->handle, &link->conf);
+			netif_device_attach(dev);
+			priv->hw_unavailable--;
+			schedule_work(&priv->reset_work);
+		}
+		break;
+	}
+
+	return err;
+}				/* spectrum_cs_event */
+
+/********************************************************************/
+/* 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 LA4100 */
+	PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
+	PCMCIA_DEVICE_MANF_CARD(0x0089, 0x0001), /* Intel PRO/Wireless 2011B */
+	PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
+
+static struct pcmcia_driver orinoco_driver = {
+	.owner		= THIS_MODULE,
+	.drv		= {
+		.name	= DRIVER_NAME,
+	},
+	.attach		= spectrum_cs_attach,
+	.event		= spectrum_cs_event,
+	.detach		= spectrum_cs_detach,
+	.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);
+	BUG_ON(dev_list != NULL);
+}
+
+module_init(init_spectrum_cs);
+module_exit(exit_spectrum_cs);