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git://projects.qi-hardware.com/openwrt-xburst.git
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ramips: protect rt288x pci config accesses with a spinlock
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17971 3c298f89-4303-0410-b956-a3cf2f4a3e73
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@ -41,6 +41,7 @@
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#define PCI_ACCESS_WRITE 1
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static void __iomem *rt2880_pci_base;
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static DEFINE_SPINLOCK(rt2880_pci_lock);
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static u32 rt2880_pci_reg_read(u32 reg)
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{
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@ -72,9 +73,12 @@ static void config_access(unsigned char access_type, struct pci_bus *bus,
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static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 *val)
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{
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unsigned long flags;
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u32 data = 0;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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config_access(PCI_ACCESS_READ, bus, devfn, where, &data);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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if (size == 1)
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*val = (data >> ((where & 3) << 3)) & 0xff;
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@ -89,8 +93,10 @@ static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn,
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static int rt2880_pci_config_write(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 val)
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{
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unsigned long flags;
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u32 data = 0;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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if (size == 4) {
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data = val;
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} else {
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@ -104,6 +110,7 @@ static int rt2880_pci_config_write(struct pci_bus *bus, unsigned int devfn,
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}
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config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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return PCIBIOS_SUCCESSFUL;
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}
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@ -138,11 +145,15 @@ static inline void read_config(unsigned long bus, unsigned long dev,
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unsigned long *val)
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{
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unsigned long address;
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unsigned long flags;
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address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) |
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0x80000000;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
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*val = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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}
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static inline void write_config(unsigned long bus, unsigned long dev,
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@ -150,11 +161,15 @@ static inline void write_config(unsigned long bus, unsigned long dev,
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unsigned long val)
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{
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unsigned long address;
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unsigned long flags;
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address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) |
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0x80000000;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
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rt2880_pci_reg_write(val, RT2880_PCI_REG_CONFIG_DATA);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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}
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int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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