From 52409fae3e4b8d16b68b61902fc09075cd97b75d Mon Sep 17 00:00:00 2001 From: Dominik Sliwa Date: Sun, 2 Jul 2017 16:41:37 +0200 Subject: Backports generated from 4.11 kernel Initial commit. Signed-off-by: Dominik Sliwa --- .../net/wireless/intersil/orinoco/orinoco_pci.c | 266 +++++++++++++++++++++ 1 file changed, 266 insertions(+) create mode 100644 drivers/net/wireless/intersil/orinoco/orinoco_pci.c (limited to 'drivers/net/wireless/intersil/orinoco/orinoco_pci.c') diff --git a/drivers/net/wireless/intersil/orinoco/orinoco_pci.c b/drivers/net/wireless/intersil/orinoco/orinoco_pci.c new file mode 100644 index 0000000..4938a22 --- /dev/null +++ b/drivers/net/wireless/intersil/orinoco/orinoco_pci.c @@ -0,0 +1,266 @@ +/* orinoco_pci.c + * + * Driver for Prism 2.5/3 devices that have a direct PCI interface + * (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge). + * The card contains only one PCI region, which contains all the usual + * hermes registers, as well as the COR register. + * + * Current maintainers 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. + */ + +#define DRIVER_NAME "orinoco_pci" +#define PFX DRIVER_NAME ": " + +#include +#include +#include +#include +#include + +#include "orinoco.h" +#include "orinoco_pci.h" + +/* Offset of the COR register of the PCI card */ +#define HERMES_PCI_COR (0x26) + +/* 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 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) +{ + struct hermes *hw = &priv->hw; + unsigned long timeout; + u16 reg; + + /* Assert the reset until the card notices */ + 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 + msecs_to_jiffies(HERMES_PCI_COR_BUSYT); + 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; + 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 */ + priv = alloc_orinocodev(sizeof(*card), &pdev->dev, + orinoco_pci_cor_reset, NULL); + if (!priv) { + printk(KERN_ERR PFX "Cannot allocate network device\n"); + err = -ENOMEM; + goto fail_alloc; + } + + card = priv->card; + + hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING); + + err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED, + DRIVER_NAME, priv); + if (err) { + printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq); + err = -EBUSY; + goto fail_irq; + } + + err = orinoco_pci_cor_reset(priv); + if (err) { + printk(KERN_ERR PFX "Initial reset failed\n"); + goto fail; + } + + err = orinoco_init(priv); + if (err) { + printk(KERN_ERR PFX "orinoco_init() failed\n"); + goto fail; + } + + err = orinoco_if_add(priv, 0, 0, NULL); + if (err) { + printk(KERN_ERR PFX "orinoco_if_add() failed\n"); + goto fail_wiphy; + } + + pci_set_drvdata(pdev, priv); + + return 0; + + fail_wiphy: + wiphy_unregister(priv_to_wiphy(priv)); + fail: + free_irq(pdev->irq, priv); + + fail_irq: + free_orinocodev(priv); + + fail_alloc: + pci_iounmap(pdev, hermes_io); + + fail_map_hermes: + pci_release_regions(pdev); + + fail_resources: + pci_disable_device(pdev); + + return err; +} + +static void orinoco_pci_remove_one(struct pci_dev *pdev) +{ + struct orinoco_private *priv = pci_get_drvdata(pdev); + + orinoco_if_del(priv); + wiphy_unregister(priv_to_wiphy(priv)); + free_irq(pdev->irq, priv); + free_orinocodev(priv); + pci_iounmap(pdev, priv->hw.iobase); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static const 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 = 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_register_driver(&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: + */ -- cgit v1.2.3