patch-2.4.19 linux-2.4.19/drivers/net/wireless/orinoco_pci.c

• Lines: 392
• Date: Fri Aug 2 17:39:44 2002
• Orig file: linux-2.4.18/drivers/net/wireless/orinoco_pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/drivers/net/wireless/orinoco_pci.c linux-2.4.19/drivers/net/wireless/orinoco_pci.c
@@ -0,0 +1,391 @@
+/* orinoco_pci.c 0.01
+ * 
+ * Driver for Prism II devices that have a direct PCI interface
+ * (i.e., not in a Pcmcia or PLX bridge)
+ *
+ * Specifically here we're talking about the Linksys WMP11
+ *
+ * Some of this code is borrowed from orinoco_plx.c
+ *	Copyright (C) 2001 Daniel Barlow <dan@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.
+ * The rest is :
+ *	Copyright (C) 2001 Jean Tourrilhes <jt@hpl.hp.com>
+ *
+ * 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.
+ */
+
+/*
+ * Theory of operation...
+ * -------------------
+ * Maybe you had a look in orinoco_plx. Well, this is totally different...
+ *
+ * The card contains only one PCI region, which contains all the usual
+ * hermes registers.
+ *
+ * The driver will memory map this region in normal memory. Because
+ * the hermes registers are mapped in normal memory and not in ISA I/O
+ * post space, we can't use the usual inw/outw macros and we need to
+ * use readw/writew.
+ * This slight difference force us to compile our own version of
+ * hermes.c with the register access macro changed. That's a bit
+ * hackish but works fine.
+ *
+ * Note that the PCI region is pretty big (4K). That's much more than
+ * the usual set of hermes register (0x0 -> 0x3E). I've got a strong
+ * suspicion that the whole memory space of the adapter is in fact in
+ * this region. Accessing directly the adapter memory instead of going
+ * through the usual register would speed up significantely the
+ * operations...
+ *
+ * Finally, the card looks like this :
+-----------------------
+  Bus  0, device  14, function  0:
+    Network controller: PCI device 1260:3873 (Harris Semiconductor) (rev 1).
+      IRQ 11.
+      Master Capable.  Latency=248.  
+      Prefetchable 32 bit memory at 0xffbcc000 [0xffbccfff].
+-----------------------
+00:0e.0 Network controller: Harris Semiconductor: Unknown device 3873 (rev 01)
+        Subsystem: Unknown device 1737:3874
+        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
+        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
+        Latency: 248 set, cache line size 08
+        Interrupt: pin A routed to IRQ 11
+        Region 0: Memory at ffbcc000 (32-bit, prefetchable) [size=4K]
+        Capabilities: [dc] Power Management version 2
+                Flags: PMEClk- AuxPwr- DSI- D1+ D2+ PME+
+                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
+-----------------------
+ *
+ * That's all..
+ *
+ * Jean II
+ */
+
+#include <linux/config.h>
+
+#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/timer.h>
+#include <linux/ioport.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <linux/proc_fs.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/wireless.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/wireless.h>
+#include <linux/fcntl.h>
+
+#include "hermes.h"
+#include "orinoco.h"
+
+/* All the magic there is from wlan-ng */
+/* Magic offset of the reset register of the PCI card */
+#define HERMES_PCI_COR		(0x26)
+/* Magic 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 */
+
+MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>");
+MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
+MODULE_LICENSE("Dual MPL/GPL");
+
+static int orinoco_pci_open(struct net_device *dev)
+{
+	struct orinoco_private *priv = (struct orinoco_private *) dev->priv;
+	int err;
+
+	netif_device_attach(dev);
+
+	err = orinoco_reset(priv);
+	if (err)
+		printk(KERN_ERR "%s: orinoco_reset failed in orinoco_pci_open()",
+		       dev->name);
+	else
+		netif_start_queue(dev);
+
+	return err;
+}
+
+static int orinoco_pci_stop(struct net_device *dev)
+{
+	struct orinoco_private *priv = (struct orinoco_private *) dev->priv;
+	netif_stop_queue(dev);
+	orinoco_shutdown(priv);
+	return 0;
+}
+
+static void
+orinoco_pci_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	orinoco_interrupt(irq, (struct orinoco_private *)dev_id, regs);
+}
+
+/*
+ * Do a soft reset of the PCI 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;
+
+	TRACE_ENTER(priv->ndev->name);
+
+
+	/* Assert the reset until the card notice */
+	hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
+	printk(KERN_NOTICE "Reset done");
+	timeout = jiffies + (HERMES_PCI_COR_ONT * HZ / 1000);
+	while(time_before(jiffies, timeout)) {
+		printk(".");
+		mdelay(1);
+	}
+	printk(";\n");
+	//mdelay(HERMES_PCI_COR_ONT);
+
+	/* Give time for the card to recover from this hard effort */
+	hermes_write_regn(hw, PCI_COR, 0x0000);
+	printk(KERN_NOTICE "Clear Reset");
+	timeout = jiffies + (HERMES_PCI_COR_OFFT * HZ / 1000);
+	while(time_before(jiffies, timeout)) {
+		printk(".");
+		mdelay(1);
+	}
+	printk(";\n");
+	//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);
+	}
+	/* Did we timeout ? */
+	if(time_after_eq(jiffies, timeout)) {
+		printk(KERN_ERR "orinoco_pci: Busy timeout\n");
+		return -ETIMEDOUT;
+	}
+	printk(KERN_NOTICE "pci_cor : reg = 0x%X - %lX - %lX\n", reg, timeout, jiffies);
+
+	TRACE_EXIT(priv->ndev->name);
+
+	return 0;
+}
+
+/*
+ * Initialise a card. Mostly similar to PLX code.
+ */
+static int orinoco_pci_init_one(struct pci_dev *pdev,
+				const struct pci_device_id *ent)
+{
+	int err = 0;
+	unsigned long pci_iorange;
+	u16 *pci_ioaddr = NULL;
+	unsigned long pci_iolen;
+	struct orinoco_private *priv = NULL;
+	struct net_device *dev = NULL;
+	int netdev_registered = 0;
+
+	TRACE_ENTER("orinoco_pci");
+
+	err = pci_enable_device(pdev);
+	if (err)
+		return -EIO;
+
+	/* Resource 0 is mapped to the hermes registers */
+	pci_iorange = pci_resource_start(pdev, 0);
+	pci_iolen = pci_resource_len(pdev, 0);
+	pci_ioaddr = ioremap(pci_iorange, pci_iolen);
+	if (! pci_iorange)
+		goto fail;
+
+	/* Usual setup of structures */
+	dev = alloc_orinocodev(0);
+	if (! dev) {
+		err = -ENOMEM;
+		goto fail;
+	}
+	priv = dev->priv;
+
+	dev->base_addr = (int) pci_ioaddr;
+        dev->mem_start = (unsigned long) pci_iorange;
+        dev->mem_end = ((unsigned long) pci_iorange) + pci_iolen - 1;
+	dev->open = orinoco_pci_open;
+	dev->stop = orinoco_pci_stop;
+/*  	priv->card_reset_handler = orinoco_pci_cor_reset; */
+
+	SET_MODULE_OWNER(dev);
+
+	printk(KERN_DEBUG
+	       "Detected Orinoco/Prism2 PCI device at %s, mem:0x%lX to 0x%lX -> 0x%p, irq:%d\n",
+	       pdev->slot_name, dev->mem_start, dev->mem_end, pci_ioaddr, pdev->irq);
+
+	hermes_struct_init(&(priv->hw), dev->base_addr, HERMES_MEM, HERMES_32BIT_REGSPACING);
+	pci_set_drvdata(pdev, dev);
+
+	err = request_irq(pdev->irq, orinoco_pci_interrupt, SA_SHIRQ, dev->name, priv);
+	if (err) {
+		printk(KERN_ERR "orinoco_pci: Error allocating IRQ %d.\n", pdev->irq);
+		err = -EBUSY;
+		goto fail;
+	}
+	dev->irq = pdev->irq;
+	/* Perform a COR reset to start the card */
+	if(orinoco_pci_cor_reset(priv) != 0) {
+		printk(KERN_ERR "%s: Failed to start the card\n", dev->name);
+		err = -ETIMEDOUT;
+		goto fail;
+	}
+
+	/* Override the normal firmware detection - the Prism 2.5 PCI
+	 * cards look like Lucent firmware but are actually Intersil */
+	priv->firmware_type = FIRMWARE_TYPE_INTERSIL;
+
+	err = register_netdev(dev);
+	if (err)
+		goto fail;
+	netdev_registered = 1;
+
+	err = orinoco_proc_dev_init(priv);
+	if (err) {
+		printk(KERN_ERR "%s: Failed to create /proc node\n", dev->name);
+		err = -EIO;
+		goto fail;
+	}
+
+	TRACE_EXIT("orinoco_pci");
+
+        return 0;               /* succeeded */
+ fail:
+	printk(KERN_DEBUG "orinoco_pci: init_one(), FAIL!\n");
+
+	if (dev) {
+		orinoco_proc_dev_cleanup(priv);
+		if (netdev_registered)
+			unregister_netdev(dev);
+
+		if (dev->irq)
+			free_irq(dev->irq, priv);
+
+		kfree(dev);
+	}
+
+	if (pci_ioaddr)
+		iounmap(pci_ioaddr);
+
+	return err;
+}
+
+static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct orinoco_private *priv = dev->priv;
+
+	TRACE_ENTER("orinoco_pci");
+
+	if (! dev)
+		BUG();
+
+	orinoco_proc_dev_cleanup(priv);
+
+	unregister_netdev(dev);
+
+        if (dev->irq)
+		free_irq(dev->irq, priv);
+
+	if (priv->hw.iobase)
+		iounmap((unsigned char *) priv->hw.iobase);
+
+	kfree(dev);
+
+	pci_disable_device(pdev);
+
+	TRACE_EXIT("orinoco_pci");
+}
+
+
+static struct pci_device_id orinoco_pci_pci_id_table[] __devinitdata = {
+	{0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
+	{0,},
+};
+
+MODULE_DEVICE_TABLE(pci, orinoco_pci_pci_id_table);
+
+static struct pci_driver orinoco_pci_driver = {
+	name:"orinoco_pci",
+	id_table:orinoco_pci_pci_id_table,
+	probe:orinoco_pci_init_one,
+	remove:__devexit_p(orinoco_pci_remove_one),
+	suspend:0,
+	resume:0
+};
+
+static int __init orinoco_pci_init(void)
+{
+	return pci_module_init(&orinoco_pci_driver);
+}
+
+extern 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:
+ */