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madwifi/ath/if_ath_ahb.c

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/*-
* Copyright (c) 2004 Atheros Communications, Inc.
* All rights reserved
*
* $Id$
*/
#include "opt_ah.h"
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
#if !defined(AUTOCONF_INCLUDED) && !defined(CONFIG_LOCALVERSION)
#include <linux/config.h>
#endif
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/cache.h>
#include <linux/platform_device.h>
#include <linux/ethtool.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include "if_media.h"
#include <net80211/ieee80211_var.h>
#include "if_athvar.h"
#include "ah_devid.h"
#include "if_ath_ahb.h"
#include "ah_soc.h"
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
#error "Kernel versions older than 2.6.19 are not supported!"
#endif
/*
* Module glue.
*/
#include "release.h"
static char *version = RELEASE_VERSION;
static char *dev_info = "ath_ahb";
static struct ath_softc *sclist[2] = {NULL, NULL};
static u_int8_t num_activesc = 0;
/* set bus cachesize in 4B word units */
void
bus_read_cachesize(struct ath_softc *sc, u_int8_t *csz)
{
/* XXX: get the appropriate value! PCI case reads from config space,
* and I think this is the data cache line-size.
*/
*csz = L1_CACHE_BYTES / sizeof(u_int32_t);
}
static int
ahb_enable_wmac(u_int16_t devid, u_int16_t wlanNum)
{
u_int32_t reset;
u_int32_t enable;
if (((devid & AR5315_REV_MAJ_M) == AR5315_REV_MAJ) ||
((devid & AR5315_REV_MAJ_M) == AR5317_REV_MAJ)) {
u_int32_t reg;
u_int32_t *en = (u_int32_t *)AR5315_AHB_ARB_CTL;
KASSERT(wlanNum == 0, ("invalid wlan # %d", wlanNum));
/* Enable Arbitration for WLAN */
*en |= AR5315_ARB_WLAN;
/* Enable global swapping so this looks like a normal BE system */
reg = REG_READ(AR5315_ENDIAN_CTL);
reg |= AR5315_CONFIG_WLAN;
REG_WRITE(AR5315_ENDIAN_CTL, reg);
/* wake up the MAC */
/* NOTE: for the following write to succeed the
* RST_AHB_ARB_CTL should be set to 0. This driver
* assumes that the register has been set to 0 by boot loader
*/
reg = REG_READ(AR5315_PCI_MAC_SCR);
reg = (reg & ~AR5315_PCI_MAC_SCR_SLMODE_M) |
(AR5315_PCI_MAC_SCR_SLM_FWAKE << AR5315_PCI_MAC_SCR_SLMODE_S);
REG_WRITE(AR5315_PCI_MAC_SCR, reg);
/* wait for the MAC to wakeup */
while (REG_READ(AR5315_PCI_MAC_PCICFG) & AR5315_PCI_MAC_PCICFG_SPWR_DN);
} else {
switch (wlanNum) {
case AR531X_WLAN0_NUM:
reset = (AR531X_RESET_WLAN0 |
AR531X_RESET_WARM_WLAN0_MAC |
AR531X_RESET_WARM_WLAN0_BB);
enable = AR531X_ENABLE_WLAN0;
break;
case AR531X_WLAN1_NUM:
reset = (AR531X_RESET_WLAN1 |
AR531X_RESET_WARM_WLAN1_MAC |
AR531X_RESET_WARM_WLAN1_BB);
enable = AR531X_ENABLE_WLAN1;
break;
default:
return -ENODEV;
}
/* reset the MAC or suffer lots of AHB PROC errors */
REG_WRITE(AR531X_RESETCTL, REG_READ(AR531X_RESETCTL) | reset);
mdelay(15);
/* take it out of reset */
REG_WRITE(AR531X_RESETCTL, REG_READ(AR531X_RESETCTL) & ~reset);
udelay(25);
/* enable it */
REG_WRITE(AR531X_ENABLE, REG_READ(AR531X_ENABLE) | enable);
}
return 0;
}
static int
ahb_disable_wmac(u_int16_t devid, u_int16_t wlanNum)
{
u_int32_t enable;
if (((devid & AR5315_REV_MAJ_M) == AR5315_REV_MAJ) ||
((devid & AR5315_REV_MAJ_M) == AR5317_REV_MAJ)) {
u_int32_t *en = (u_int32_t *)AR5315_AHB_ARB_CTL;
KASSERT(wlanNum == 0, ("invalid wlan # %d", wlanNum));
/* Enable Arbitration for WLAN */
*en &= ~AR5315_ARB_WLAN;
} else {
switch (wlanNum) {
case AR531X_WLAN0_NUM:
enable = AR531X_ENABLE_WLAN0;
break;
case AR531X_WLAN1_NUM:
enable = AR531X_ENABLE_WLAN1;
break;
default:
return -ENODEV;
}
REG_WRITE(AR531X_ENABLE, REG_READ(AR531X_ENABLE) & ~enable);
}
return 0;
}
static int
exit_ath_wmac(u_int16_t wlanNum, struct ar531x_config *config)
{
struct ath_softc *sc = sclist[wlanNum];
struct net_device *dev;
u_int16_t devid;
if (sc == NULL)
return -ENODEV; /* XXX: correct return value? */
dev = sc->sc_dev;
ath_detach(dev);
if (dev->irq)
free_irq(dev->irq, dev);
devid = sc->devid;
config->tag = (void *)((unsigned long) devid);
ahb_disable_wmac(devid, wlanNum);
free_netdev(dev);
sclist[wlanNum] = NULL;
return 0;
}
static int
init_ath_wmac(u_int16_t devid, u_int16_t wlanNum, struct ar531x_config *config)
{
const char *athname;
struct net_device *dev;
struct ath_softc *sc;
if (((wlanNum != 0) && (wlanNum != 1)) ||
(sclist[wlanNum] != NULL))
goto bad;
ahb_enable_wmac(devid, wlanNum);
dev = alloc_netdev(sizeof(struct ath_softc), "wifi%d", ether_setup);
if (dev == NULL) {
printk(KERN_ERR "%s: no memory for device state\n", dev_info);
goto bad2;
}
sc = netdev_priv(dev);
sc->sc_dev = dev;
/*
* Mark the device as detached to avoid processing
* interrupts until setup is complete.
*/
sc->sc_invalid = 1;
SET_MODULE_OWNER(dev);
sclist[wlanNum] = sc;
switch (wlanNum) {
case AR531X_WLAN0_NUM:
if (((devid & AR5315_REV_MAJ_M) == AR5315_REV_MAJ) ||
((devid & AR5315_REV_MAJ_M) == AR5317_REV_MAJ)) {
dev->irq = AR5315_IRQ_WLAN0_INTRS;
dev->mem_start = AR5315_WLAN0;
} else {
dev->irq = AR531X_IRQ_WLAN0_INTRS;
dev->mem_start = AR531X_WLAN0;
}
break;
case AR531X_WLAN1_NUM:
dev->irq = AR531X_IRQ_WLAN1_INTRS;
dev->mem_start = KSEG1ADDR(AR531X_WLAN1);
break;
default:
goto bad3;
}
dev->mem_end = dev->mem_start + AR531X_WLANX_LEN;
sc->sc_iobase = (void __iomem *)dev->mem_start;
sc->sc_bdev = NULL;
if (request_irq(dev->irq, ath_intr, IRQF_SHARED, dev->name, dev)) {
printk(KERN_WARNING "%s: %s: request_irq failed\n", dev_info, dev->name);
goto bad3;
}
if (ath_attach(devid, dev, config) != 0)
goto bad4;
athname = ath_hal_probe(ATHEROS_VENDOR_ID, devid);
printk(KERN_INFO "%s: %s: %s: mem=0x%lx, irq=%d\n",
dev_info, dev->name, athname ? athname : "Atheros ???", dev->mem_start, dev->irq);
num_activesc++;
/* Ready to process interrupts */
sc->sc_invalid = 0;
return 0;
bad4:
free_irq(dev->irq, dev);
bad3:
free_netdev(dev);
sclist[wlanNum] = NULL;
bad2:
ahb_disable_wmac(devid, wlanNum);
bad:
return -ENODEV;
}
static int ahb_wmac_probe(struct platform_device *pdev)
{
u_int16_t devid;
struct ar531x_config *config;
config = (struct ar531x_config *)pdev->dev.platform_data;
devid = (long) config->tag;
config->tag = NULL;
return init_ath_wmac(devid, pdev->id, config);
}
static int ahb_wmac_remove(struct platform_device *pdev)
{
exit_ath_wmac(pdev->id, (struct ar531x_config *)pdev->dev.platform_data);
return 0;
}
static struct platform_driver ahb_wmac_driver = {
.driver.name = "ar531x-wmac",
.probe = ahb_wmac_probe,
.remove = ahb_wmac_remove
};
int
ath_ioctl_ethtool(struct ath_softc *sc, int cmd, void __user *addr)
{
struct ethtool_drvinfo info;
if (cmd != ETHTOOL_GDRVINFO)
return -EOPNOTSUPP;
memset(&info, 0, sizeof(info));
info.cmd = cmd;
strncpy(info.driver, dev_info, sizeof(info.driver) - 1);
strncpy(info.version, version, sizeof(info.version) - 1);
return copy_to_user(addr, &info, sizeof(info)) ? -EFAULT : 0;
}
MODULE_AUTHOR("Atheros Communications, Inc.");
MODULE_DESCRIPTION("Support for Atheros 802.11 wireless LAN cards.");
#ifdef MODULE_VERSION
MODULE_VERSION(RELEASE_VERSION);
#endif
MODULE_SUPPORTED_DEVICE("Atheros WLAN cards");
#ifdef MODULE_LICENSE
MODULE_LICENSE("Dual BSD/GPL");
#endif
static int __init
init_ath_ahb(void)
{
printk(KERN_INFO "%s: %s\n", dev_info, version);
platform_driver_register(&ahb_wmac_driver);
ath_sysctl_register();
return 0;
}
module_init(init_ath_ahb);
static void __exit
exit_ath_ahb(void)
{
ath_sysctl_unregister();
platform_driver_unregister(&ahb_wmac_driver);
printk(KERN_INFO "%s: driver unloaded\n", dev_info);
}
module_exit(exit_ath_ahb);
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