forked from Minki/linux
06b3a1d12f
printk() statements on module load or unload are frowned upon. Also, add a few __init or __exit declarations. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
380 lines
10 KiB
C
380 lines
10 KiB
C
/*
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* Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
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* Symbol Wireless Networker LA4137, CompactFlash cards by Socket
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* Communications and Intel PRO/Wireless 2011B.
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*
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* The driver implements Symbol firmware download. The rest is handled
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* in hermes.c and main.c.
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*
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* Utilities for downloading the Symbol firmware are available at
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* http://sourceforge.net/projects/orinoco/
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*
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* Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
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* Portions based on orinoco_cs.c:
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* Copyright (C) David Gibson, Linuxcare Australia
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* Portions based on Spectrum24tDnld.c from original spectrum24 driver:
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* Copyright (C) Symbol Technologies.
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*
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* See copyright notice in file main.c.
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*/
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#define DRIVER_NAME "spectrum_cs"
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#define PFX DRIVER_NAME ": "
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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 <pcmcia/cistpl.h>
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#include <pcmcia/cisreg.h>
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#include <pcmcia/ds.h>
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#include "orinoco.h"
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/********************************************************************/
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/* Module stuff */
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/********************************************************************/
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MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
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MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
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MODULE_LICENSE("Dual MPL/GPL");
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/* Module parameters */
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/* Some D-Link cards have buggy CIS. They do work at 5v properly, but
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* don't have any CIS entry for it. This workaround it... */
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static int ignore_cis_vcc; /* = 0 */
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module_param(ignore_cis_vcc, int, 0);
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MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
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/********************************************************************/
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/* Data structures */
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/********************************************************************/
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/* PCMCIA specific device information (goes in the card field of
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* struct orinoco_private */
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struct orinoco_pccard {
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struct pcmcia_device *p_dev;
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};
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/********************************************************************/
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/* Function prototypes */
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/********************************************************************/
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static int spectrum_cs_config(struct pcmcia_device *link);
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static void spectrum_cs_release(struct pcmcia_device *link);
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/* Constants for the CISREG_CCSR register */
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#define HCR_RUN 0x07 /* run firmware after reset */
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#define HCR_IDLE 0x0E /* don't run firmware after reset */
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#define HCR_MEM16 0x10 /* memory width bit, should be preserved */
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/*
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* Reset the card using configuration registers COR and CCSR.
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* If IDLE is 1, stop the firmware, so that it can be safely rewritten.
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*/
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static int
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spectrum_reset(struct pcmcia_device *link, int idle)
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{
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int ret;
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u8 save_cor;
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u8 ccsr;
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/* Doing it if hardware is gone is guaranteed crash */
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if (!pcmcia_dev_present(link))
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return -ENODEV;
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/* Save original COR value */
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ret = pcmcia_read_config_byte(link, CISREG_COR, &save_cor);
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if (ret)
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goto failed;
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/* Soft-Reset card */
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ret = pcmcia_write_config_byte(link, CISREG_COR,
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(save_cor | COR_SOFT_RESET));
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if (ret)
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goto failed;
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udelay(1000);
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/* Read CCSR */
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ret = pcmcia_read_config_byte(link, CISREG_CCSR, &ccsr);
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if (ret)
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goto failed;
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/*
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* Start or stop the firmware. Memory width bit should be
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* preserved from the value we've just read.
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*/
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ccsr = (idle ? HCR_IDLE : HCR_RUN) | (ccsr & HCR_MEM16);
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ret = pcmcia_write_config_byte(link, CISREG_CCSR, ccsr);
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if (ret)
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goto failed;
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udelay(1000);
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/* Restore original COR configuration index */
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ret = pcmcia_write_config_byte(link, CISREG_COR,
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(save_cor & ~COR_SOFT_RESET));
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if (ret)
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goto failed;
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udelay(1000);
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return 0;
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failed:
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return -ENODEV;
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}
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/********************************************************************/
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/* Device methods */
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/********************************************************************/
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static int
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spectrum_cs_hard_reset(struct orinoco_private *priv)
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{
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struct orinoco_pccard *card = priv->card;
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struct pcmcia_device *link = card->p_dev;
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/* Soft reset using COR and HCR */
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spectrum_reset(link, 0);
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return 0;
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}
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static int
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spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle)
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{
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struct orinoco_pccard *card = priv->card;
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struct pcmcia_device *link = card->p_dev;
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return spectrum_reset(link, idle);
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}
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/********************************************************************/
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/* PCMCIA stuff */
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/********************************************************************/
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/*
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* This creates an "instance" of the driver, allocating local data
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* structures for one device. The device is registered with Card
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* Services.
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*
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* The dev_link structure is initialized, but we don't actually
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* configure the card at this point -- we wait until we receive a card
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* insertion event. */
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static int
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spectrum_cs_probe(struct pcmcia_device *link)
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{
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struct orinoco_private *priv;
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struct orinoco_pccard *card;
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priv = alloc_orinocodev(sizeof(*card), &link->dev,
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spectrum_cs_hard_reset,
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spectrum_cs_stop_firmware);
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if (!priv)
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return -ENOMEM;
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card = priv->card;
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/* Link both structures together */
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card->p_dev = link;
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link->priv = priv;
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return spectrum_cs_config(link);
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} /* spectrum_cs_attach */
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/*
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* This deletes a driver "instance". The device is de-registered with
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* Card Services. If it has been released, all local data structures
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* are freed. Otherwise, the structures will be freed when the device
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* is released.
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*/
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static void spectrum_cs_detach(struct pcmcia_device *link)
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{
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struct orinoco_private *priv = link->priv;
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orinoco_if_del(priv);
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spectrum_cs_release(link);
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free_orinocodev(priv);
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} /* spectrum_cs_detach */
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/*
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* spectrum_cs_config() is scheduled to run after a CARD_INSERTION
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* event is received, to configure the PCMCIA socket, and to make the
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* device available to the system.
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*/
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static int spectrum_cs_config_check(struct pcmcia_device *p_dev,
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void *priv_data)
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{
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if (p_dev->config_index == 0)
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return -EINVAL;
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return pcmcia_request_io(p_dev);
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};
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static int
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spectrum_cs_config(struct pcmcia_device *link)
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{
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struct orinoco_private *priv = link->priv;
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hermes_t *hw = &priv->hw;
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int ret;
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void __iomem *mem;
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/*
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* In this loop, we scan the CIS for configuration table
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* entries, each of which describes a valid card
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* configuration, including voltage, IO window, memory window,
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* and interrupt settings.
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*
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* We make no assumptions about the card to be configured: we
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* use just the information available in the CIS. In an ideal
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* world, this would work for any PCMCIA card, but it requires
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* a complete and accurate CIS. In practice, a driver usually
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* "knows" most of these things without consulting the CIS,
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* and most client drivers will only use the CIS to fill in
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* implementation-defined details.
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*/
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link->config_flags |= CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC |
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CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
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if (ignore_cis_vcc)
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link->config_flags &= ~CONF_AUTO_CHECK_VCC;
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ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL);
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if (ret) {
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if (!ignore_cis_vcc)
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printk(KERN_ERR PFX "GetNextTuple(): No matching "
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"CIS configuration. Maybe you need the "
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"ignore_cis_vcc=1 parameter.\n");
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goto failed;
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}
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ret = pcmcia_request_irq(link, orinoco_interrupt);
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if (ret)
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goto failed;
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/* We initialize the hermes structure before completing PCMCIA
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* configuration just in case the interrupt handler gets
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* called. */
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mem = ioport_map(link->resource[0]->start,
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resource_size(link->resource[0]));
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if (!mem)
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goto failed;
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hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
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hw->eeprom_pda = true;
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/*
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* This actually configures the PCMCIA socket -- setting up
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* the I/O windows and the interrupt mapping, and putting the
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* card and host interface into "Memory and IO" mode.
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*/
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ret = pcmcia_enable_device(link);
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if (ret)
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goto failed;
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/* Reset card */
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if (spectrum_cs_hard_reset(priv) != 0)
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goto failed;
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/* Initialise the main driver */
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if (orinoco_init(priv) != 0) {
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printk(KERN_ERR PFX "orinoco_init() failed\n");
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goto failed;
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}
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/* Register an interface with the stack */
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if (orinoco_if_add(priv, link->resource[0]->start,
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link->irq, NULL) != 0) {
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printk(KERN_ERR PFX "orinoco_if_add() failed\n");
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goto failed;
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}
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return 0;
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failed:
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spectrum_cs_release(link);
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return -ENODEV;
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} /* spectrum_cs_config */
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/*
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* After a card is removed, spectrum_cs_release() will unregister the
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* device, and release the PCMCIA configuration. If the device is
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* still open, this will be postponed until it is closed.
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*/
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static void
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spectrum_cs_release(struct pcmcia_device *link)
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{
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struct orinoco_private *priv = link->priv;
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unsigned long flags;
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/* We're committed to taking the device away now, so mark the
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* hardware as unavailable */
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priv->hw.ops->lock_irqsave(&priv->lock, &flags);
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priv->hw_unavailable++;
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priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
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pcmcia_disable_device(link);
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if (priv->hw.iobase)
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ioport_unmap(priv->hw.iobase);
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} /* spectrum_cs_release */
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static int
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spectrum_cs_suspend(struct pcmcia_device *link)
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{
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struct orinoco_private *priv = link->priv;
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int err = 0;
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/* Mark the device as stopped, to block IO until later */
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orinoco_down(priv);
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return err;
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}
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static int
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spectrum_cs_resume(struct pcmcia_device *link)
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{
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struct orinoco_private *priv = link->priv;
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int err = orinoco_up(priv);
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return err;
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}
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/********************************************************************/
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/* Module initialization */
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/********************************************************************/
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static struct pcmcia_device_id spectrum_cs_ids[] = {
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PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */
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PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
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PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */
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PCMCIA_DEVICE_NULL,
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};
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MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
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static struct pcmcia_driver orinoco_driver = {
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.owner = THIS_MODULE,
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.name = DRIVER_NAME,
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.probe = spectrum_cs_probe,
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.remove = spectrum_cs_detach,
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.suspend = spectrum_cs_suspend,
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.resume = spectrum_cs_resume,
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.id_table = spectrum_cs_ids,
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};
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static int __init
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init_spectrum_cs(void)
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{
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return pcmcia_register_driver(&orinoco_driver);
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}
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static void __exit
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exit_spectrum_cs(void)
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{
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pcmcia_unregister_driver(&orinoco_driver);
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}
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module_init(init_spectrum_cs);
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module_exit(exit_spectrum_cs);
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