| /* 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/delay.h> |
| #include <linux/pci.h> |
| |
| #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 <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: |
| */ |