/*
* Driver for Prism 2.5/3 devices that have a direct PCI interface
*/
#define DRIVER_NAME "orinoco_pci"
#define PFX DRIVER_NAME ": "
#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"
/* 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 + (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;
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;
}
pci_set_drvdata(pdev, priv);
return 0;
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);
free_irq(pdev->irq, priv);
free_orinocodev(priv);
pci_iounmap(pdev, priv->hw.iobase);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static DEFINE_PCI_DEVICE_TABLE(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 <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_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:
*/
