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0f4da2d77e
"hostap: Protect against initialization interrupt" (which reinstated "wireless: hostap, fix oops due to early probing interrupt") reintroduced Bug 16111. This is because hostap_pci wasn't setting dev->base_addr, which is now checked in prism2_interrupt. As a result, initialization was failing for PCI-based hostap devices. This corrects that oversight. Signed-off-by: John W. Linville <linville@tuxdriver.com>
475 lines
11 KiB
C
475 lines
11 KiB
C
#define PRISM2_PCI
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/* Host AP driver's support for Intersil Prism2.5 PCI cards is based on
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* driver patches from Reyk Floeter <reyk@vantronix.net> and
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* Andy Warner <andyw@pobox.com> */
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/if.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/wireless.h>
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#include <net/iw_handler.h>
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#include <linux/ioport.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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#include "hostap_wlan.h"
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static char *dev_info = "hostap_pci";
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MODULE_AUTHOR("Jouni Malinen");
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MODULE_DESCRIPTION("Support for Intersil Prism2.5-based 802.11 wireless LAN "
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"PCI cards.");
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MODULE_SUPPORTED_DEVICE("Intersil Prism2.5-based WLAN PCI cards");
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MODULE_LICENSE("GPL");
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/* struct local_info::hw_priv */
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struct hostap_pci_priv {
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void __iomem *mem_start;
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};
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/* FIX: do we need mb/wmb/rmb with memory operations? */
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static DEFINE_PCI_DEVICE_TABLE(prism2_pci_id_table) = {
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/* Intersil Prism3 ISL3872 11Mb/s WLAN Controller */
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{ 0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID },
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/* Intersil Prism2.5 ISL3874 11Mb/s WLAN Controller */
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{ 0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID },
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/* Samsung MagicLAN SWL-2210P */
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{ 0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID },
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{ 0 }
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};
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#ifdef PRISM2_IO_DEBUG
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static inline void hfa384x_outb_debug(struct net_device *dev, int a, u8 v)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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local_info_t *local;
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unsigned long flags;
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iface = netdev_priv(dev);
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local = iface->local;
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hw_priv = local->hw_priv;
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spin_lock_irqsave(&local->lock, flags);
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prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTB, a, v);
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writeb(v, hw_priv->mem_start + a);
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spin_unlock_irqrestore(&local->lock, flags);
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}
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static inline u8 hfa384x_inb_debug(struct net_device *dev, int a)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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local_info_t *local;
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unsigned long flags;
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u8 v;
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iface = netdev_priv(dev);
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local = iface->local;
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hw_priv = local->hw_priv;
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spin_lock_irqsave(&local->lock, flags);
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v = readb(hw_priv->mem_start + a);
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prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INB, a, v);
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spin_unlock_irqrestore(&local->lock, flags);
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return v;
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}
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static inline void hfa384x_outw_debug(struct net_device *dev, int a, u16 v)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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local_info_t *local;
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unsigned long flags;
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iface = netdev_priv(dev);
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local = iface->local;
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hw_priv = local->hw_priv;
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spin_lock_irqsave(&local->lock, flags);
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prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTW, a, v);
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writew(v, hw_priv->mem_start + a);
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spin_unlock_irqrestore(&local->lock, flags);
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}
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static inline u16 hfa384x_inw_debug(struct net_device *dev, int a)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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local_info_t *local;
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unsigned long flags;
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u16 v;
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iface = netdev_priv(dev);
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local = iface->local;
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hw_priv = local->hw_priv;
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spin_lock_irqsave(&local->lock, flags);
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v = readw(hw_priv->mem_start + a);
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prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INW, a, v);
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spin_unlock_irqrestore(&local->lock, flags);
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return v;
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}
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#define HFA384X_OUTB(v,a) hfa384x_outb_debug(dev, (a), (v))
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#define HFA384X_INB(a) hfa384x_inb_debug(dev, (a))
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#define HFA384X_OUTW(v,a) hfa384x_outw_debug(dev, (a), (v))
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#define HFA384X_INW(a) hfa384x_inw_debug(dev, (a))
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#define HFA384X_OUTW_DATA(v,a) hfa384x_outw_debug(dev, (a), le16_to_cpu((v)))
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#define HFA384X_INW_DATA(a) cpu_to_le16(hfa384x_inw_debug(dev, (a)))
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#else /* PRISM2_IO_DEBUG */
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static inline void hfa384x_outb(struct net_device *dev, int a, u8 v)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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iface = netdev_priv(dev);
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hw_priv = iface->local->hw_priv;
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writeb(v, hw_priv->mem_start + a);
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}
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static inline u8 hfa384x_inb(struct net_device *dev, int a)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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iface = netdev_priv(dev);
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hw_priv = iface->local->hw_priv;
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return readb(hw_priv->mem_start + a);
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}
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static inline void hfa384x_outw(struct net_device *dev, int a, u16 v)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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iface = netdev_priv(dev);
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hw_priv = iface->local->hw_priv;
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writew(v, hw_priv->mem_start + a);
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}
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static inline u16 hfa384x_inw(struct net_device *dev, int a)
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{
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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iface = netdev_priv(dev);
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hw_priv = iface->local->hw_priv;
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return readw(hw_priv->mem_start + a);
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}
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#define HFA384X_OUTB(v,a) hfa384x_outb(dev, (a), (v))
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#define HFA384X_INB(a) hfa384x_inb(dev, (a))
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#define HFA384X_OUTW(v,a) hfa384x_outw(dev, (a), (v))
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#define HFA384X_INW(a) hfa384x_inw(dev, (a))
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#define HFA384X_OUTW_DATA(v,a) hfa384x_outw(dev, (a), le16_to_cpu((v)))
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#define HFA384X_INW_DATA(a) cpu_to_le16(hfa384x_inw(dev, (a)))
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#endif /* PRISM2_IO_DEBUG */
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static int hfa384x_from_bap(struct net_device *dev, u16 bap, void *buf,
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int len)
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{
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u16 d_off;
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__le16 *pos;
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d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
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pos = (__le16 *) buf;
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for ( ; len > 1; len -= 2)
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*pos++ = HFA384X_INW_DATA(d_off);
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if (len & 1)
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*((char *) pos) = HFA384X_INB(d_off);
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return 0;
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}
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static int hfa384x_to_bap(struct net_device *dev, u16 bap, void *buf, int len)
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{
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u16 d_off;
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__le16 *pos;
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d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
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pos = (__le16 *) buf;
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for ( ; len > 1; len -= 2)
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HFA384X_OUTW_DATA(*pos++, d_off);
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if (len & 1)
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HFA384X_OUTB(*((char *) pos), d_off);
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return 0;
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}
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/* FIX: This might change at some point.. */
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#include "hostap_hw.c"
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static void prism2_pci_cor_sreset(local_info_t *local)
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{
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struct net_device *dev = local->dev;
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u16 reg;
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reg = HFA384X_INB(HFA384X_PCICOR_OFF);
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printk(KERN_DEBUG "%s: Original COR value: 0x%0x\n", dev->name, reg);
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/* linux-wlan-ng uses extremely long hold and settle times for
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* COR sreset. A comment in the driver code mentions that the long
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* delays appear to be necessary. However, at least IBM 22P6901 seems
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* to work fine with shorter delays.
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*
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* Longer delays can be configured by uncommenting following line: */
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/* #define PRISM2_PCI_USE_LONG_DELAYS */
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#ifdef PRISM2_PCI_USE_LONG_DELAYS
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int i;
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HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
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mdelay(250);
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HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
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mdelay(500);
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/* Wait for f/w to complete initialization (CMD:BUSY == 0) */
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i = 2000000 / 10;
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while ((HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) && --i)
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udelay(10);
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#else /* PRISM2_PCI_USE_LONG_DELAYS */
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HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
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mdelay(2);
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HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
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mdelay(2);
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#endif /* PRISM2_PCI_USE_LONG_DELAYS */
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if (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) {
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printk(KERN_DEBUG "%s: COR sreset timeout\n", dev->name);
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}
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}
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static void prism2_pci_genesis_reset(local_info_t *local, int hcr)
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{
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struct net_device *dev = local->dev;
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HFA384X_OUTW(0x00C5, HFA384X_PCICOR_OFF);
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mdelay(10);
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HFA384X_OUTW(hcr, HFA384X_PCIHCR_OFF);
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mdelay(10);
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HFA384X_OUTW(0x0045, HFA384X_PCICOR_OFF);
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mdelay(10);
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}
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static struct prism2_helper_functions prism2_pci_funcs =
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{
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.card_present = NULL,
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.cor_sreset = prism2_pci_cor_sreset,
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.genesis_reset = prism2_pci_genesis_reset,
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.hw_type = HOSTAP_HW_PCI,
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};
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static int prism2_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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unsigned long phymem;
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void __iomem *mem = NULL;
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local_info_t *local = NULL;
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struct net_device *dev = NULL;
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static int cards_found /* = 0 */;
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int irq_registered = 0;
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struct hostap_interface *iface;
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struct hostap_pci_priv *hw_priv;
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hw_priv = kzalloc(sizeof(*hw_priv), GFP_KERNEL);
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if (hw_priv == NULL)
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return -ENOMEM;
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if (pci_enable_device(pdev))
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goto err_out_free;
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phymem = pci_resource_start(pdev, 0);
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if (!request_mem_region(phymem, pci_resource_len(pdev, 0), "Prism2")) {
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printk(KERN_ERR "prism2: Cannot reserve PCI memory region\n");
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goto err_out_disable;
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}
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mem = pci_ioremap_bar(pdev, 0);
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if (mem == NULL) {
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printk(KERN_ERR "prism2: Cannot remap PCI memory region\n") ;
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goto fail;
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}
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dev = prism2_init_local_data(&prism2_pci_funcs, cards_found,
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&pdev->dev);
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if (dev == NULL)
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goto fail;
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iface = netdev_priv(dev);
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local = iface->local;
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local->hw_priv = hw_priv;
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cards_found++;
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dev->irq = pdev->irq;
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hw_priv->mem_start = mem;
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dev->base_addr = (unsigned long) mem;
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prism2_pci_cor_sreset(local);
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pci_set_drvdata(pdev, dev);
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if (request_irq(dev->irq, prism2_interrupt, IRQF_SHARED, dev->name,
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dev)) {
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printk(KERN_WARNING "%s: request_irq failed\n", dev->name);
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goto fail;
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} else
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irq_registered = 1;
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if (!local->pri_only && prism2_hw_config(dev, 1)) {
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printk(KERN_DEBUG "%s: hardware initialization failed\n",
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dev_info);
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goto fail;
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}
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printk(KERN_INFO "%s: Intersil Prism2.5 PCI: "
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"mem=0x%lx, irq=%d\n", dev->name, phymem, dev->irq);
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return hostap_hw_ready(dev);
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fail:
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if (irq_registered && dev)
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free_irq(dev->irq, dev);
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if (mem)
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iounmap(mem);
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release_mem_region(phymem, pci_resource_len(pdev, 0));
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err_out_disable:
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pci_disable_device(pdev);
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prism2_free_local_data(dev);
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err_out_free:
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kfree(hw_priv);
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return -ENODEV;
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}
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static void prism2_pci_remove(struct pci_dev *pdev)
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{
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struct net_device *dev;
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struct hostap_interface *iface;
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void __iomem *mem_start;
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struct hostap_pci_priv *hw_priv;
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dev = pci_get_drvdata(pdev);
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iface = netdev_priv(dev);
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hw_priv = iface->local->hw_priv;
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/* Reset the hardware, and ensure interrupts are disabled. */
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prism2_pci_cor_sreset(iface->local);
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hfa384x_disable_interrupts(dev);
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if (dev->irq)
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free_irq(dev->irq, dev);
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mem_start = hw_priv->mem_start;
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prism2_free_local_data(dev);
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kfree(hw_priv);
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iounmap(mem_start);
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release_mem_region(pci_resource_start(pdev, 0),
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pci_resource_len(pdev, 0));
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pci_disable_device(pdev);
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}
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#ifdef CONFIG_PM
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static int prism2_pci_suspend(struct pci_dev *pdev, pm_message_t state)
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{
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struct net_device *dev = pci_get_drvdata(pdev);
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if (netif_running(dev)) {
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netif_stop_queue(dev);
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netif_device_detach(dev);
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}
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prism2_suspend(dev);
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pci_save_state(pdev);
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pci_disable_device(pdev);
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pci_set_power_state(pdev, PCI_D3hot);
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return 0;
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}
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static int prism2_pci_resume(struct pci_dev *pdev)
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{
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struct net_device *dev = pci_get_drvdata(pdev);
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int err;
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err = pci_enable_device(pdev);
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if (err) {
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printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
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dev->name);
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return err;
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}
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pci_restore_state(pdev);
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prism2_hw_config(dev, 0);
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if (netif_running(dev)) {
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netif_device_attach(dev);
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netif_start_queue(dev);
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}
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return 0;
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}
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#endif /* CONFIG_PM */
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MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);
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static struct pci_driver prism2_pci_driver = {
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.name = "hostap_pci",
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.id_table = prism2_pci_id_table,
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.probe = prism2_pci_probe,
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.remove = prism2_pci_remove,
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#ifdef CONFIG_PM
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.suspend = prism2_pci_suspend,
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.resume = prism2_pci_resume,
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#endif /* CONFIG_PM */
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};
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static int __init init_prism2_pci(void)
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{
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return pci_register_driver(&prism2_pci_driver);
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}
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static void __exit exit_prism2_pci(void)
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{
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pci_unregister_driver(&prism2_pci_driver);
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}
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module_init(init_prism2_pci);
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module_exit(exit_prism2_pci);
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