137 lines
2.8 KiB
C
Executable File
137 lines
2.8 KiB
C
Executable File
#include <linux/types.h>
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#include <linux/pci.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 <asm/addrspace.h>
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#include <asm/tc3162/tc3162.h>
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#define PCI_CONFIG_ADDR 0x1fb80cf8
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#define PCI_CONFIG_DATA 0x1fb80cfc
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(f, a...) printk(f, ## a )
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#else
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#define DBG(f, a...) do {} while (0)
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#endif
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#define PCI_ENABLE 0x80000000
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static spinlock_t pci_lock = SPIN_LOCK_UNLOCKED;
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/* -------------------------------------------------------------------------*/
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static inline void write_cfgaddr(u32 addr)
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{
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__raw_writel((addr | PCI_ENABLE),
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(void __iomem *)(KSEG1ADDR(PCI_CONFIG_ADDR)));
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}
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static inline void write_cfgdata(u32 data)
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{
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__raw_writel(data, (void __iomem *)KSEG1ADDR(PCI_CONFIG_DATA));
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}
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static inline u32 read_cfgdata(void)
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{
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return __raw_readl((void __iomem *)KSEG1ADDR(PCI_CONFIG_DATA));
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}
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static inline u32 mkaddr(struct pci_bus *bus, unsigned int devfn, int where)
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{
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#ifndef PCIE_PCI_COEXIT
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return (((bus->number & 0xFF) << 16) | ((devfn & 0xFF) << 8) | \
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(where & 0xFC));
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#else
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return (((bus->number & 0) << 16) | ((devfn & 0xFF) << 8) | \
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(where & 0xFC));
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#endif
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}
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/* -------------------------------------------------------------------------*/
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static int tc3162_pcibios_read(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 *val)
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{
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unsigned long flags;
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u32 data;
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spin_lock_irqsave(&pci_lock, flags);
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write_cfgaddr(mkaddr(bus,devfn,where));
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data = read_cfgdata();
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DBG("PCI: cfg_read %02u.%02u.%01u/%02X:%01d, cfg:0x%08X",
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bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn),
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where, size, data);
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switch (size) {
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case 1:
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if (where & 1)
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data >>= 8;
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if (where & 2)
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data >>= 16;
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data &= 0xFF;
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break;
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case 2:
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if (where & 2)
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data >>= 16;
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data &= 0xFFFF;
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break;
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}
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*val = data;
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DBG(", 0x%08X returned\n", data);
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spin_unlock_irqrestore(&pci_lock, flags);
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return PCIBIOS_SUCCESSFUL;
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}
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static int tc3162_pcibios_write(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 val)
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{
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unsigned long flags;
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u32 data;
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int s;
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spin_lock_irqsave(&pci_lock, flags);
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write_cfgaddr(mkaddr(bus,devfn,where));
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data = read_cfgdata();
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DBG("PCI: cfg_write %02u.%02u.%01u/%02X:%01d, cfg:0x%08X",
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bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn),
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where, size, data);
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switch (size) {
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case 1:
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s = ((where & 3) << 3);
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data &= ~(0xFF << s);
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data |= ((val & 0xFF) << s);
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break;
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case 2:
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s = ((where & 2) << 4);
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data &= ~(0xFFFF << s);
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data |= ((val & 0xFFFF) << s);
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break;
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case 4:
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data = val;
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break;
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}
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write_cfgdata(data);
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DBG(", 0x%08X written\n", data);
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spin_unlock_irqrestore(&pci_lock, flags);
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return PCIBIOS_SUCCESSFUL;
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}
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struct pci_ops tc3162_pci_ops = {
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.read = tc3162_pcibios_read,
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.write = tc3162_pcibios_write
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};
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