cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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orinoco_tmd.c (6339B)


      1/* orinoco_tmd.c
      2 *
      3 * Driver for Prism II devices which would usually be driven by orinoco_cs,
      4 * but are connected to the PCI bus by a TMD7160.
      5 *
      6 * Copyright (C) 2003 Joerg Dorchain <joerg AT dorchain.net>
      7 * based heavily upon orinoco_plx.c Copyright (C) 2001 Daniel Barlow
      8 *
      9 * The contents of this file are subject to the Mozilla Public License
     10 * Version 1.1 (the "License"); you may not use this file except in
     11 * compliance with the License. You may obtain a copy of the License
     12 * at http://www.mozilla.org/MPL/
     13 *
     14 * Software distributed under the License is distributed on an "AS IS"
     15 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
     16 * the License for the specific language governing rights and
     17 * limitations under the License.
     18 *
     19 * Alternatively, the contents of this file may be used under the
     20 * terms of the GNU General Public License version 2 (the "GPL"), in
     21 * which case the provisions of the GPL are applicable instead of the
     22 * above.  If you wish to allow the use of your version of this file
     23 * only under the terms of the GPL and not to allow others to use your
     24 * version of this file under the MPL, indicate your decision by
     25 * deleting the provisions above and replace them with the notice and
     26 * other provisions required by the GPL.  If you do not delete the
     27 * provisions above, a recipient may use your version of this file
     28 * under either the MPL or the GPL.
     29 *
     30 * The actual driving is done by main.c, this is just resource
     31 * allocation stuff.
     32 *
     33 * This driver is modeled after the orinoco_plx driver. The main
     34 * difference is that the TMD chip has only IO port ranges and doesn't
     35 * provide access to the PCMCIA attribute space.
     36 *
     37 * Pheecom sells cards with the TMD chip as "ASIC version"
     38 */
     39
     40#define DRIVER_NAME "orinoco_tmd"
     41#define PFX DRIVER_NAME ": "
     42
     43#include <linux/module.h>
     44#include <linux/kernel.h>
     45#include <linux/init.h>
     46#include <linux/delay.h>
     47#include <linux/pci.h>
     48#include <pcmcia/cisreg.h>
     49
     50#include "orinoco.h"
     51#include "orinoco_pci.h"
     52
     53#define COR_VALUE	(COR_LEVEL_REQ | COR_FUNC_ENA) /* Enable PC card with interrupt in level trigger */
     54#define COR_RESET     (0x80)	/* reset bit in the COR register */
     55#define TMD_RESET_TIME	(500)	/* milliseconds */
     56
     57/*
     58 * Do a soft reset of the card using the Configuration Option Register
     59 */
     60static int orinoco_tmd_cor_reset(struct orinoco_private *priv)
     61{
     62	struct hermes *hw = &priv->hw;
     63	struct orinoco_pci_card *card = priv->card;
     64	unsigned long timeout;
     65	u16 reg;
     66
     67	iowrite8(COR_VALUE | COR_RESET, card->bridge_io);
     68	mdelay(1);
     69
     70	iowrite8(COR_VALUE, card->bridge_io);
     71	mdelay(1);
     72
     73	/* Just in case, wait more until the card is no longer busy */
     74	timeout = jiffies + msecs_to_jiffies(TMD_RESET_TIME);
     75	reg = hermes_read_regn(hw, CMD);
     76	while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
     77		mdelay(1);
     78		reg = hermes_read_regn(hw, CMD);
     79	}
     80
     81	/* Still busy? */
     82	if (reg & HERMES_CMD_BUSY) {
     83		printk(KERN_ERR PFX "Busy timeout\n");
     84		return -ETIMEDOUT;
     85	}
     86
     87	return 0;
     88}
     89
     90
     91static int orinoco_tmd_init_one(struct pci_dev *pdev,
     92				const struct pci_device_id *ent)
     93{
     94	int err;
     95	struct orinoco_private *priv;
     96	struct orinoco_pci_card *card;
     97	void __iomem *hermes_io, *bridge_io;
     98
     99	err = pci_enable_device(pdev);
    100	if (err) {
    101		printk(KERN_ERR PFX "Cannot enable PCI device\n");
    102		return err;
    103	}
    104
    105	err = pci_request_regions(pdev, DRIVER_NAME);
    106	if (err) {
    107		printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
    108		goto fail_resources;
    109	}
    110
    111	bridge_io = pci_iomap(pdev, 1, 0);
    112	if (!bridge_io) {
    113		printk(KERN_ERR PFX "Cannot map bridge registers\n");
    114		err = -EIO;
    115		goto fail_map_bridge;
    116	}
    117
    118	hermes_io = pci_iomap(pdev, 2, 0);
    119	if (!hermes_io) {
    120		printk(KERN_ERR PFX "Cannot map chipset registers\n");
    121		err = -EIO;
    122		goto fail_map_hermes;
    123	}
    124
    125	/* Allocate network device */
    126	priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
    127				orinoco_tmd_cor_reset, NULL);
    128	if (!priv) {
    129		printk(KERN_ERR PFX "Cannot allocate network device\n");
    130		err = -ENOMEM;
    131		goto fail_alloc;
    132	}
    133
    134	card = priv->card;
    135	card->bridge_io = bridge_io;
    136
    137	hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
    138
    139	err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
    140			  DRIVER_NAME, priv);
    141	if (err) {
    142		printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
    143		err = -EBUSY;
    144		goto fail_irq;
    145	}
    146
    147	err = orinoco_tmd_cor_reset(priv);
    148	if (err) {
    149		printk(KERN_ERR PFX "Initial reset failed\n");
    150		goto fail;
    151	}
    152
    153	err = orinoco_init(priv);
    154	if (err) {
    155		printk(KERN_ERR PFX "orinoco_init() failed\n");
    156		goto fail;
    157	}
    158
    159	err = orinoco_if_add(priv, 0, 0, NULL);
    160	if (err) {
    161		printk(KERN_ERR PFX "orinoco_if_add() failed\n");
    162		goto fail;
    163	}
    164
    165	pci_set_drvdata(pdev, priv);
    166
    167	return 0;
    168
    169 fail:
    170	free_irq(pdev->irq, priv);
    171
    172 fail_irq:
    173	free_orinocodev(priv);
    174
    175 fail_alloc:
    176	pci_iounmap(pdev, hermes_io);
    177
    178 fail_map_hermes:
    179	pci_iounmap(pdev, bridge_io);
    180
    181 fail_map_bridge:
    182	pci_release_regions(pdev);
    183
    184 fail_resources:
    185	pci_disable_device(pdev);
    186
    187	return err;
    188}
    189
    190static void orinoco_tmd_remove_one(struct pci_dev *pdev)
    191{
    192	struct orinoco_private *priv = pci_get_drvdata(pdev);
    193	struct orinoco_pci_card *card = priv->card;
    194
    195	orinoco_if_del(priv);
    196	free_irq(pdev->irq, priv);
    197	free_orinocodev(priv);
    198	pci_iounmap(pdev, priv->hw.iobase);
    199	pci_iounmap(pdev, card->bridge_io);
    200	pci_release_regions(pdev);
    201	pci_disable_device(pdev);
    202}
    203
    204static const struct pci_device_id orinoco_tmd_id_table[] = {
    205	{0x15e8, 0x0131, PCI_ANY_ID, PCI_ANY_ID,},      /* NDC and OEMs, e.g. pheecom */
    206	{0,},
    207};
    208
    209MODULE_DEVICE_TABLE(pci, orinoco_tmd_id_table);
    210
    211static struct pci_driver orinoco_tmd_driver = {
    212	.name		= DRIVER_NAME,
    213	.id_table	= orinoco_tmd_id_table,
    214	.probe		= orinoco_tmd_init_one,
    215	.remove		= orinoco_tmd_remove_one,
    216	.driver.pm	= &orinoco_pci_pm_ops,
    217};
    218
    219static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
    220	" (Joerg Dorchain <joerg@dorchain.net>)";
    221MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
    222MODULE_DESCRIPTION("Driver for wireless LAN cards using the TMD7160 PCI bridge");
    223MODULE_LICENSE("Dual MPL/GPL");
    224
    225static int __init orinoco_tmd_init(void)
    226{
    227	printk(KERN_DEBUG "%s\n", version);
    228	return pci_register_driver(&orinoco_tmd_driver);
    229}
    230
    231static void __exit orinoco_tmd_exit(void)
    232{
    233	pci_unregister_driver(&orinoco_tmd_driver);
    234}
    235
    236module_init(orinoco_tmd_init);
    237module_exit(orinoco_tmd_exit);