diff options
Diffstat (limited to 'drivers/net/wireless/orinoco_pci.c')
| -rw-r--r-- | drivers/net/wireless/orinoco_pci.c | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/drivers/net/wireless/orinoco_pci.c b/drivers/net/wireless/orinoco_pci.c new file mode 100644 index 00000000000..ff30d37e12e --- /dev/null +++ b/drivers/net/wireless/orinoco_pci.c @@ -0,0 +1,417 @@ +/* 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 <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. + */ + +/* + * 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 + */ + +#define DRIVER_NAME "orinoco_pci" +#define PFX DRIVER_NAME ": " + +#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 <linux/netdevice.h> +#include <linux/if_arp.h> +#include <linux/etherdevice.h> +#include <linux/list.h> +#include <linux/pci.h> +#include <linux/fcntl.h> + +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/system.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 */ + +/* Orinoco PCI specific data */ +struct orinoco_pci_card { + void __iomem *pci_ioaddr; +}; + +/* + * 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; +} + +/* + * 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 __iomem *pci_ioaddr = NULL; + unsigned long pci_iolen; + struct orinoco_private *priv = NULL; + struct orinoco_pci_card *card; + struct net_device *dev = NULL; + + 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 != 0) { + printk(KERN_ERR PFX "Cannot obtain PCI resources\n"); + goto fail_resources; + } + + /* 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) { + printk(KERN_ERR PFX "Cannot remap hardware registers\n"); + goto fail_map; + } + + /* Allocate network device */ + dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset); + if (! dev) { + err = -ENOMEM; + goto fail_alloc; + } + + priv = netdev_priv(dev); + card = priv->card; + card->pci_ioaddr = pci_ioaddr; + dev->mem_start = pci_iorange; + dev->mem_end = pci_iorange + pci_iolen - 1; + SET_MODULE_OWNER(dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + hermes_struct_init(&priv->hw, pci_ioaddr, HERMES_32BIT_REGSPACING); + + printk(KERN_DEBUG PFX "Detected device %s, mem:0x%lx-0x%lx, irq %d\n", + pci_name(pdev), dev->mem_start, dev->mem_end, pdev->irq); + + 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; + } + dev->irq = pdev->irq; + + /* Perform a COR reset to start the card */ + 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 "Failed to register net 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: + iounmap(pci_ioaddr); + + fail_map: + 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); + struct orinoco_pci_card *card = priv->card; + + unregister_netdev(dev); + free_irq(dev->irq, dev); + pci_set_drvdata(pdev, NULL); + free_orinocodev(dev); + iounmap(card->pci_ioaddr); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static int orinoco_pci_suspend(struct pci_dev *pdev, u32 state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct orinoco_private *priv = netdev_priv(dev); + unsigned long flags; + int err; + + printk(KERN_DEBUG "%s: Orinoco-PCI entering sleep mode (state=%d)\n", + dev->name, state); + + err = orinoco_lock(priv, &flags); + if (err) { + printk(KERN_ERR "%s: hw_unavailable on orinoco_pci_suspend\n", + dev->name); + return err; + } + + err = __orinoco_down(dev); + if (err) + printk(KERN_WARNING "%s: orinoco_pci_suspend(): Error %d downing interface\n", + dev->name, err); + + netif_device_detach(dev); + + priv->hw_unavailable++; + + orinoco_unlock(priv, &flags); + + pci_save_state(pdev); + pci_set_power_state(pdev, 3); + + return 0; +} + +static int orinoco_pci_resume(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct orinoco_private *priv = netdev_priv(dev); + unsigned long flags; + int err; + + printk(KERN_DEBUG "%s: Orinoco-PCI waking up\n", dev->name); + + pci_set_power_state(pdev, 0); + pci_restore_state(pdev); + + err = orinoco_reinit_firmware(dev); + if (err) { + printk(KERN_ERR "%s: Error %d re-initializing firmware on orinoco_pci_resume()\n", + dev->name, err); + return err; + } + + spin_lock_irqsave(&priv->lock, flags); + + netif_device_attach(dev); + + priv->hw_unavailable--; + + if (priv->open && (! priv->hw_unavailable)) { + err = __orinoco_up(dev); + if (err) + printk(KERN_ERR "%s: Error %d restarting card on orinoco_pci_resume()\n", + dev->name, err); + } + + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static struct pci_device_id orinoco_pci_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_pci_id_table); + +static struct pci_driver orinoco_pci_driver = { + .name = DRIVER_NAME, + .id_table = orinoco_pci_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_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: + */ |