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linux-sg2042/drivers/net/wireless/orinoco/spectrum_cs.c

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/*
* Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
* Symbol Wireless Networker LA4137, CompactFlash cards by Socket
* Communications and Intel PRO/Wireless 2011B.
*
* The driver implements Symbol firmware download. The rest is handled
* in hermes.c and main.c.
*
* Utilities for downloading the Symbol firmware are available at
* http://sourceforge.net/projects/orinoco/
*
* Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
* Portions based on orinoco_cs.c:
* Copyright (C) David Gibson, Linuxcare Australia
* Portions based on Spectrum24tDnld.c from original spectrum24 driver:
* Copyright (C) Symbol Technologies.
*
* See copyright notice in file main.c.
*/
#define DRIVER_NAME "spectrum_cs"
#define PFX DRIVER_NAME ": "
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
#include "orinoco.h"
/********************************************************************/
/* Module stuff */
/********************************************************************/
MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
MODULE_LICENSE("Dual MPL/GPL");
/* Module parameters */
/* Some D-Link cards have buggy CIS. They do work at 5v properly, but
* don't have any CIS entry for it. This workaround it... */
static int ignore_cis_vcc; /* = 0 */
module_param(ignore_cis_vcc, int, 0);
MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
/********************************************************************/
/* Data structures */
/********************************************************************/
/* PCMCIA specific device information (goes in the card field of
* struct orinoco_private */
struct orinoco_pccard {
struct pcmcia_device *p_dev;
};
/********************************************************************/
/* Function prototypes */
/********************************************************************/
static int spectrum_cs_config(struct pcmcia_device *link);
static void spectrum_cs_release(struct pcmcia_device *link);
/* Constants for the CISREG_CCSR register */
#define HCR_RUN 0x07 /* run firmware after reset */
#define HCR_IDLE 0x0E /* don't run firmware after reset */
#define HCR_MEM16 0x10 /* memory width bit, should be preserved */
/*
* Reset the card using configuration registers COR and CCSR.
* If IDLE is 1, stop the firmware, so that it can be safely rewritten.
*/
static int
spectrum_reset(struct pcmcia_device *link, int idle)
{
int ret;
u8 save_cor;
u8 ccsr;
/* Doing it if hardware is gone is guaranteed crash */
if (!pcmcia_dev_present(link))
return -ENODEV;
/* Save original COR value */
ret = pcmcia_read_config_byte(link, CISREG_COR, &save_cor);
if (ret)
goto failed;
/* Soft-Reset card */
ret = pcmcia_write_config_byte(link, CISREG_COR,
(save_cor | COR_SOFT_RESET));
if (ret)
goto failed;
udelay(1000);
/* Read CCSR */
ret = pcmcia_read_config_byte(link, CISREG_CCSR, &ccsr);
if (ret)
goto failed;
/*
* Start or stop the firmware. Memory width bit should be
* preserved from the value we've just read.
*/
ccsr = (idle ? HCR_IDLE : HCR_RUN) | (ccsr & HCR_MEM16);
ret = pcmcia_write_config_byte(link, CISREG_CCSR, ccsr);
if (ret)
goto failed;
udelay(1000);
/* Restore original COR configuration index */
ret = pcmcia_write_config_byte(link, CISREG_COR,
(save_cor & ~COR_SOFT_RESET));
if (ret)
goto failed;
udelay(1000);
return 0;
failed:
return -ENODEV;
}
/********************************************************************/
/* Device methods */
/********************************************************************/
static int
spectrum_cs_hard_reset(struct orinoco_private *priv)
{
struct orinoco_pccard *card = priv->card;
struct pcmcia_device *link = card->p_dev;
/* Soft reset using COR and HCR */
spectrum_reset(link, 0);
return 0;
}
static int
spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle)
{
struct orinoco_pccard *card = priv->card;
struct pcmcia_device *link = card->p_dev;
return spectrum_reset(link, idle);
}
/********************************************************************/
/* PCMCIA stuff */
/********************************************************************/
static int
spectrum_cs_probe(struct pcmcia_device *link)
{
struct orinoco_private *priv;
struct orinoco_pccard *card;
priv = alloc_orinocodev(sizeof(*card), &link->dev,
spectrum_cs_hard_reset,
spectrum_cs_stop_firmware);
if (!priv)
return -ENOMEM;
card = priv->card;
/* Link both structures together */
card->p_dev = link;
link->priv = priv;
return spectrum_cs_config(link);
} /* spectrum_cs_attach */
static void spectrum_cs_detach(struct pcmcia_device *link)
{
struct orinoco_private *priv = link->priv;
orinoco_if_del(priv);
spectrum_cs_release(link);
free_orinocodev(priv);
} /* spectrum_cs_detach */
static int spectrum_cs_config_check(struct pcmcia_device *p_dev,
void *priv_data)
{
if (p_dev->config_index == 0)
return -EINVAL;
return pcmcia_request_io(p_dev);
};
static int
spectrum_cs_config(struct pcmcia_device *link)
{
struct orinoco_private *priv = link->priv;
struct hermes *hw = &priv->hw;
int ret;
void __iomem *mem;
link->config_flags |= CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC |
CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
if (ignore_cis_vcc)
link->config_flags &= ~CONF_AUTO_CHECK_VCC;
ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL);
if (ret) {
if (!ignore_cis_vcc)
printk(KERN_ERR PFX "GetNextTuple(): No matching "
"CIS configuration. Maybe you need the "
"ignore_cis_vcc=1 parameter.\n");
goto failed;
}
mem = ioport_map(link->resource[0]->start,
resource_size(link->resource[0]));
if (!mem)
goto failed;
/* We initialize the hermes structure before completing PCMCIA
* configuration just in case the interrupt handler gets
* called. */
hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
hw->eeprom_pda = true;
ret = pcmcia_request_irq(link, orinoco_interrupt);
if (ret)
goto failed;
ret = pcmcia_enable_device(link);
if (ret)
goto failed;
/* Reset card */
if (spectrum_cs_hard_reset(priv) != 0)
goto failed;
/* Initialise the main driver */
if (orinoco_init(priv) != 0) {
printk(KERN_ERR PFX "orinoco_init() failed\n");
goto failed;
}
/* Register an interface with the stack */
if (orinoco_if_add(priv, link->resource[0]->start,
link->irq, NULL) != 0) {
printk(KERN_ERR PFX "orinoco_if_add() failed\n");
goto failed;
}
return 0;
failed:
spectrum_cs_release(link);
return -ENODEV;
} /* spectrum_cs_config */
static void
spectrum_cs_release(struct pcmcia_device *link)
{
struct orinoco_private *priv = link->priv;
unsigned long flags;
/* We're committed to taking the device away now, so mark the
* hardware as unavailable */
priv->hw.ops->lock_irqsave(&priv->lock, &flags);
priv->hw_unavailable++;
priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
pcmcia_disable_device(link);
if (priv->hw.iobase)
ioport_unmap(priv->hw.iobase);
} /* spectrum_cs_release */
static int
spectrum_cs_suspend(struct pcmcia_device *link)
{
struct orinoco_private *priv = link->priv;
int err = 0;
/* Mark the device as stopped, to block IO until later */
orinoco_down(priv);
return err;
}
static int
spectrum_cs_resume(struct pcmcia_device *link)
{
struct orinoco_private *priv = link->priv;
int err = orinoco_up(priv);
return err;
}
/********************************************************************/
/* Module initialization */
/********************************************************************/
static const struct pcmcia_device_id spectrum_cs_ids[] = {
PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */
PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */
PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
static struct pcmcia_driver orinoco_driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
.probe = spectrum_cs_probe,
.remove = spectrum_cs_detach,
.suspend = spectrum_cs_suspend,
.resume = spectrum_cs_resume,
.id_table = spectrum_cs_ids,
};
static int __init
init_spectrum_cs(void)
{
return pcmcia_register_driver(&orinoco_driver);
}
static void __exit
exit_spectrum_cs(void)
{
pcmcia_unregister_driver(&orinoco_driver);
}
module_init(init_spectrum_cs);
module_exit(exit_spectrum_cs);
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