![Pavel Roskin](/assets/img/avatar_default.png)
Signed-off-by: Pavel Roskin <proski@gnu.org> Remove inneeded system includes. Most system includes are not needed. In particular, the hardware backends don't need anything network related. Some includes have been moved from local headers to the C files where they are actually used. Includes that have to be in the local headers are no longer from the C sources. Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
400 lines
11 KiB
C
400 lines
11 KiB
C
/* orinoco_pci.c
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*
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* Driver for Prism II devices that have a direct PCI interface
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* (i.e., not in a Pcmcia or PLX bridge)
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*
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* Specifically here we're talking about the Linksys WMP11
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*
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* Current maintainers (as of 29 September 2003) are:
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* Pavel Roskin <proski AT gnu.org>
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* and David Gibson <hermes AT gibson.dropbear.id.au>
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*
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* Some of this code is borrowed from orinoco_plx.c
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* Copyright (C) 2001 Daniel Barlow <dan AT telent.net>
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* Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
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* has been copied from it. linux-wlan-ng-0.1.10 is originally :
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* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
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* This file originally written by:
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* Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com>
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* And is now maintained by:
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* (C) Copyright David Gibson, IBM Corp. 2002-2003.
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License
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* at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and
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* limitations under the License.
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License version 2 (the "GPL"), in
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* which case the provisions of the GPL are applicable instead of the
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* above. If you wish to allow the use of your version of this file
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* only under the terms of the GPL and not to allow others to use your
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* version of this file under the MPL, indicate your decision by
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* deleting the provisions above and replace them with the notice and
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* other provisions required by the GPL. If you do not delete the
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* provisions above, a recipient may use your version of this file
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* under either the MPL or the GPL.
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*/
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/*
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* Theory of operation...
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* -------------------
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* Maybe you had a look in orinoco_plx. Well, this is totally different...
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*
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* The card contains only one PCI region, which contains all the usual
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* hermes registers.
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*
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* The driver will memory map this region in normal memory. Because
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* the hermes registers are mapped in normal memory and not in ISA I/O
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* post space, we can't use the usual inw/outw macros and we need to
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* use readw/writew.
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* This slight difference force us to compile our own version of
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* hermes.c with the register access macro changed. That's a bit
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* hackish but works fine.
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*
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* Note that the PCI region is pretty big (4K). That's much more than
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* the usual set of hermes register (0x0 -> 0x3E). I've got a strong
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* suspicion that the whole memory space of the adapter is in fact in
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* this region. Accessing directly the adapter memory instead of going
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* through the usual register would speed up significantely the
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* operations...
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*
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* Finally, the card looks like this :
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-----------------------
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Bus 0, device 14, function 0:
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Network controller: PCI device 1260:3873 (Harris Semiconductor) (rev 1).
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IRQ 11.
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Master Capable. Latency=248.
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Prefetchable 32 bit memory at 0xffbcc000 [0xffbccfff].
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-----------------------
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00:0e.0 Network controller: Harris Semiconductor: Unknown device 3873 (rev 01)
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Subsystem: Unknown device 1737:3874
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Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
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Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
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Latency: 248 set, cache line size 08
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Interrupt: pin A routed to IRQ 11
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Region 0: Memory at ffbcc000 (32-bit, prefetchable) [size=4K]
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Capabilities: [dc] Power Management version 2
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Flags: PMEClk- AuxPwr- DSI- D1+ D2+ PME+
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Status: D0 PME-Enable- DSel=0 DScale=0 PME-
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-----------------------
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*
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* That's all..
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*
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* Jean II
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*/
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#define DRIVER_NAME "orinoco_pci"
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#define PFX DRIVER_NAME ": "
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include "orinoco.h"
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/* All the magic there is from wlan-ng */
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/* Magic offset of the reset register of the PCI card */
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#define HERMES_PCI_COR (0x26)
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/* Magic bitmask to reset the card */
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#define HERMES_PCI_COR_MASK (0x0080)
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/* Magic timeouts for doing the reset.
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* Those times are straight from wlan-ng, and it is claimed that they
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* are necessary. Alan will kill me. Take your time and grab a coffee. */
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#define HERMES_PCI_COR_ONT (250) /* ms */
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#define HERMES_PCI_COR_OFFT (500) /* ms */
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#define HERMES_PCI_COR_BUSYT (500) /* ms */
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/* Orinoco PCI specific data */
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struct orinoco_pci_card {
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void __iomem *pci_ioaddr;
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};
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/*
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* Do a soft reset of the PCI card using the Configuration Option Register
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* We need this to get going...
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* This is the part of the code that is strongly inspired from wlan-ng
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*
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* Note : This code is done with irq enabled. This mean that many
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* interrupts will occur while we are there. This is why we use the
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* jiffies to regulate time instead of a straight mdelay(). Usually we
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* need only around 245 iteration of the loop to do 250 ms delay.
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*
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* Note bis : Don't try to access HERMES_CMD during the reset phase.
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* It just won't work !
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*/
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static int
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orinoco_pci_cor_reset(struct orinoco_private *priv)
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{
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hermes_t *hw = &priv->hw;
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unsigned long timeout;
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u16 reg;
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/* Assert the reset until the card notice */
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hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
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mdelay(HERMES_PCI_COR_ONT);
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/* Give time for the card to recover from this hard effort */
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hermes_write_regn(hw, PCI_COR, 0x0000);
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mdelay(HERMES_PCI_COR_OFFT);
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/* The card is ready when it's no longer busy */
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timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
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reg = hermes_read_regn(hw, CMD);
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while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
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mdelay(1);
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reg = hermes_read_regn(hw, CMD);
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}
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/* Still busy? */
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if (reg & HERMES_CMD_BUSY) {
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printk(KERN_ERR PFX "Busy timeout\n");
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return -ETIMEDOUT;
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}
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return 0;
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}
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/*
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* Initialise a card. Mostly similar to PLX code.
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*/
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static int orinoco_pci_init_one(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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int err = 0;
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unsigned long pci_iorange;
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u16 __iomem *pci_ioaddr = NULL;
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unsigned long pci_iolen;
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struct orinoco_private *priv = NULL;
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struct orinoco_pci_card *card;
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struct net_device *dev = NULL;
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err = pci_enable_device(pdev);
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if (err) {
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printk(KERN_ERR PFX "Cannot enable PCI device\n");
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return err;
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}
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err = pci_request_regions(pdev, DRIVER_NAME);
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if (err != 0) {
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printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
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goto fail_resources;
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}
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/* Resource 0 is mapped to the hermes registers */
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pci_iorange = pci_resource_start(pdev, 0);
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pci_iolen = pci_resource_len(pdev, 0);
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pci_ioaddr = ioremap(pci_iorange, pci_iolen);
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if (!pci_iorange) {
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printk(KERN_ERR PFX "Cannot remap hardware registers\n");
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goto fail_map;
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}
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/* Allocate network device */
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dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset);
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if (! dev) {
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err = -ENOMEM;
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goto fail_alloc;
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}
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priv = netdev_priv(dev);
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card = priv->card;
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card->pci_ioaddr = pci_ioaddr;
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dev->mem_start = pci_iorange;
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dev->mem_end = pci_iorange + pci_iolen - 1;
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SET_MODULE_OWNER(dev);
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SET_NETDEV_DEV(dev, &pdev->dev);
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hermes_struct_init(&priv->hw, pci_ioaddr, HERMES_32BIT_REGSPACING);
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printk(KERN_DEBUG PFX "Detected device %s, mem:0x%lx-0x%lx, irq %d\n",
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pci_name(pdev), dev->mem_start, dev->mem_end, pdev->irq);
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err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
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dev->name, dev);
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if (err) {
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printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
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err = -EBUSY;
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goto fail_irq;
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}
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dev->irq = pdev->irq;
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/* Perform a COR reset to start the card */
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err = orinoco_pci_cor_reset(priv);
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if (err) {
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printk(KERN_ERR PFX "Initial reset failed\n");
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goto fail;
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}
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err = register_netdev(dev);
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if (err) {
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printk(KERN_ERR PFX "Failed to register net device\n");
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goto fail;
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}
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pci_set_drvdata(pdev, dev);
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return 0;
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fail:
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free_irq(pdev->irq, dev);
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fail_irq:
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pci_set_drvdata(pdev, NULL);
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free_orinocodev(dev);
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fail_alloc:
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iounmap(pci_ioaddr);
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fail_map:
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pci_release_regions(pdev);
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fail_resources:
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pci_disable_device(pdev);
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return err;
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}
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static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
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{
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struct net_device *dev = pci_get_drvdata(pdev);
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struct orinoco_private *priv = netdev_priv(dev);
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struct orinoco_pci_card *card = priv->card;
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unregister_netdev(dev);
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free_irq(dev->irq, dev);
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pci_set_drvdata(pdev, NULL);
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free_orinocodev(dev);
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iounmap(card->pci_ioaddr);
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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}
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static int orinoco_pci_suspend(struct pci_dev *pdev, pm_message_t state)
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{
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struct net_device *dev = pci_get_drvdata(pdev);
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struct orinoco_private *priv = netdev_priv(dev);
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unsigned long flags;
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int err;
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err = orinoco_lock(priv, &flags);
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if (err) {
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printk(KERN_ERR "%s: hw_unavailable on orinoco_pci_suspend\n",
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dev->name);
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return err;
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}
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err = __orinoco_down(dev);
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if (err)
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printk(KERN_WARNING "%s: orinoco_pci_suspend(): Error %d downing interface\n",
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dev->name, err);
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netif_device_detach(dev);
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priv->hw_unavailable++;
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orinoco_unlock(priv, &flags);
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pci_save_state(pdev);
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pci_set_power_state(pdev, PCI_D3hot);
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return 0;
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}
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static int orinoco_pci_resume(struct pci_dev *pdev)
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{
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struct net_device *dev = pci_get_drvdata(pdev);
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struct orinoco_private *priv = netdev_priv(dev);
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unsigned long flags;
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int err;
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printk(KERN_DEBUG "%s: Orinoco-PCI waking up\n", dev->name);
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pci_set_power_state(pdev, 0);
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pci_restore_state(pdev);
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err = orinoco_reinit_firmware(dev);
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if (err) {
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printk(KERN_ERR "%s: Error %d re-initializing firmware on orinoco_pci_resume()\n",
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dev->name, err);
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return err;
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}
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spin_lock_irqsave(&priv->lock, flags);
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netif_device_attach(dev);
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priv->hw_unavailable--;
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if (priv->open && (! priv->hw_unavailable)) {
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err = __orinoco_up(dev);
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if (err)
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printk(KERN_ERR "%s: Error %d restarting card on orinoco_pci_resume()\n",
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dev->name, err);
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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return 0;
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}
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static struct pci_device_id orinoco_pci_pci_id_table[] = {
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/* Intersil Prism 3 */
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{0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
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/* Intersil Prism 2.5 */
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{0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
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/* Samsung MagicLAN SWL-2210P */
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{0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
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{0,},
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};
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MODULE_DEVICE_TABLE(pci, orinoco_pci_pci_id_table);
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static struct pci_driver orinoco_pci_driver = {
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.name = DRIVER_NAME,
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.id_table = orinoco_pci_pci_id_table,
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.probe = orinoco_pci_init_one,
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.remove = __devexit_p(orinoco_pci_remove_one),
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.suspend = orinoco_pci_suspend,
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.resume = orinoco_pci_resume,
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};
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static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
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" (Pavel Roskin <proski@gnu.org>,"
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" David Gibson <hermes@gibson.dropbear.id.au> &"
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" Jean Tourrilhes <jt@hpl.hp.com>)";
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MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & David Gibson <hermes@gibson.dropbear.id.au>");
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MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
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MODULE_LICENSE("Dual MPL/GPL");
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static int __init orinoco_pci_init(void)
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{
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printk(KERN_DEBUG "%s\n", version);
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return pci_module_init(&orinoco_pci_driver);
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}
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static void __exit orinoco_pci_exit(void)
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{
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pci_unregister_driver(&orinoco_pci_driver);
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}
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module_init(orinoco_pci_init);
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module_exit(orinoco_pci_exit);
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* tab-width: 8
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* End:
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*/
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