/* orinoco_pci.c * * 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 * * Current maintainers (as of 29 September 2003) are: * Pavel Roskin * and David Gibson * * Some of this code is borrowed from orinoco_plx.c * Copyright (C) 2001 Daniel Barlow * 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 * 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. */ /* * 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- SERR- #include #include #include #include #include #include "orinoco.h" #include "orinoco_pci.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 */ /* * 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; /* Assert the reset until the card notice */ 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; struct net_device *dev; 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 */ dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset); if (!dev) { printk(KERN_ERR PFX "Cannot allocate network device\n"); err = -ENOMEM; goto fail_alloc; } priv = netdev_priv(dev); card = priv->card; SET_MODULE_OWNER(dev); SET_NETDEV_DEV(dev, &pdev->dev); hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING); err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ, dev->name, dev); if (err) { printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq); err = -EBUSY; goto fail_irq; } orinoco_pci_setup_netdev(dev, pdev, 0); err = orinoco_pci_cor_reset(priv); if (err) { printk(KERN_ERR PFX "Initial reset failed\n"); goto fail; } err = register_netdev(dev); if (err) { printk(KERN_ERR PFX "Cannot register network device\n"); goto fail; } pci_set_drvdata(pdev, dev); return 0; fail: free_irq(pdev->irq, dev); fail_irq: pci_set_drvdata(pdev, NULL); free_orinocodev(dev); 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 net_device *dev = pci_get_drvdata(pdev); struct orinoco_private *priv = netdev_priv(dev); unregister_netdev(dev); free_irq(dev->irq, dev); pci_set_drvdata(pdev, NULL); free_orinocodev(dev); pci_iounmap(pdev, priv->hw.iobase); pci_release_regions(pdev); pci_disable_device(pdev); } static struct pci_device_id 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 ," " David Gibson &" " Jean Tourrilhes )"; MODULE_AUTHOR("Pavel Roskin & David Gibson "); 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_module_init(&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: */