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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [or32/] [kernel/] [bios32.c] - Blame information for rev 1765

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1 666 simons 
/*****************************************************************************/
2 
 
3 
/*
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 *      bios32.c -- PCI access code for embedded CO-MEM Lite PCI controller.
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 *
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 *      (C) Copyright 1999-2000, Greg Ungerer (gerg@moreton.com.au).
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 */
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/*****************************************************************************/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/bios32.h>
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#include <linux/pci.h>
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#include <asm/anchor.h>
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/*****************************************************************************/
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#ifdef CONFIG_PCI
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/*****************************************************************************/
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unsigned long pcibios_init(unsigned long mem_start, unsigned long mem_end)
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{
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        volatile unsigned long  *rp;
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        int                     slot;
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#if 0
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        printk("%s(%d): pcibios_init()\n", __FILE__, __LINE__);
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#endif
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        /*
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         *      Do some sort of basic check to see if the CO-MEM part
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         *      is present...
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         */
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        rp = (volatile unsigned long *) COMEM_BASE;
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        if ((rp[COMEM_LBUSCFG] & 0xffff) != 0x0b50) {
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                printk("PCI: no PCI bus present\n");
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                return(mem_start);
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        }
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        /*
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         *      Do a quick scan of the PCI bus and see what is here.
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         */
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        for (slot = COMEM_MINIDSEL; (slot <= COMEM_MAXIDSEL); slot++) {
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                rp[COMEM_DAHBASE] = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << slot);
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                rp[COMEM_PCIBUS] = 0; /* Clear bus */
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                printk("PCI: slot %d  -->  %08x\n", slot, rp[COMEM_PCIBUS]);
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        }
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        return(mem_start);
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}
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/*****************************************************************************/
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unsigned long pcibios_fixup(unsigned long mem_start, unsigned long mem_end)
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{
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        return(mem_start);
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}
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/*****************************************************************************/
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int pcibios_present(void)
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{
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        return(1);
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}
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/*****************************************************************************/
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int pcibios_read_config_dword(unsigned char bus, unsigned char dev,
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        unsigned char offset, unsigned int *val)
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{
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#if 0
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        printk("%s(%d): pcibios_read_config_dword(bus=%x,dev=%x,offset=%x,"
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                "val=%x)\n", __FILE__, __LINE__, bus, dev, offset, val);
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#endif
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        *val = 0xffffffff;
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        return(PCIBIOS_SUCCESSFUL);
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}
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/*****************************************************************************/
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int pcibios_read_config_word(unsigned char bus, unsigned char dev,
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        unsigned char offset, unsigned short *val)
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{
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#if 0
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        printk("%s(%d): pcibios_read_config_word(bus=%x,dev=%x,offset=%x)\n",
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                __FILE__, __LINE__, bus, dev, offset);
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#endif
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        *val = 0xffff;
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        return(PCIBIOS_SUCCESSFUL);
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}
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/*****************************************************************************/
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int pcibios_read_config_byte(unsigned char bus, unsigned char dev,
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        unsigned char offset, unsigned char *val)
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{
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#if 0
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        printk("%s(%d): pcibios_read_config_byte(bus=%x,dev=%x,offset=%x)\n",
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                __FILE__, __LINE__, bus, dev, offset);
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#endif
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        *val = 0xff;
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        return(PCIBIOS_SUCCESSFUL);
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}
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/*****************************************************************************/
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int pcibios_write_config_dword(unsigned char bus, unsigned char dev,
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        unsigned char offset, unsigned int val)
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{
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#if 0
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        printk("%s(%d): pcibios_write_config_dword(bus=%x,dev=%x,offset=%x)\n",
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                __FILE__, __LINE__, bus, dev, offset);
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#endif
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        return(PCIBIOS_SUCCESSFUL);
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}
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/*****************************************************************************/
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int pcibios_write_config_word(unsigned char bus, unsigned char dev,
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        unsigned char offset, unsigned short val)
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{
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#if 0
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        printk("%s(%d): pcibios_write_config_word(bus=%x,dev=%x,offset=%x)\n",
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                __FILE__, __LINE__, bus, dev, offset);
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#endif
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        return(PCIBIOS_SUCCESSFUL);
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}
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/*****************************************************************************/
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int pcibios_write_config_byte(unsigned char bus, unsigned char dev,
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        unsigned char offset, unsigned char val)
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{
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#if 0
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        printk("%s(%d): pcibios_write_config_byte(bus=%x,dev=%x,offset=%x)\n",
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                __FILE__, __LINE__, bus, dev, offset);
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#endif
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        return(PCIBIOS_SUCCESSFUL);
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}
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/*****************************************************************************/
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int pcibios_find_device(unsigned short vendor, unsigned short devid,
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        unsigned short index, unsigned char *bus, unsigned char *dev)
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{
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        unsigned int    vendev, val;
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        unsigned char   devnr;
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#if 0
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        printk("%s(%d): pcibios_find_device(vendor=%04x,devid=%04x,"
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                "index=%d)\n", __FILE__, __LINE__, vendor, devid, index);
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#endif
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        if (vendor == 0xffff)
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                return(PCIBIOS_BAD_VENDOR_ID);
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        vendev = (devid << 16) | vendor;
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        for (devnr = 0; (devnr < 32); devnr++) {
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                pcibios_read_config_dword(0, devnr, PCI_VENDOR_ID, &val);
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                if (vendev == val) {
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                        if (index-- == 0) {
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                                *bus = 0;
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                                *dev = devnr;
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                                return(PCIBIOS_SUCCESSFUL);
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                        }
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                }
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        }
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        return(PCIBIOS_DEVICE_NOT_FOUND);
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}
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/*****************************************************************************/
174 
 
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int pcibios_find_class(unsigned int class, unsigned short index,
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        unsigned char *bus, unsigned char *dev)
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{
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        unsigned int    val;
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        unsigned char   devnr;
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181 
#if 0
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        printk("%s(%d): pcibios_find_class(class=%04x,index=%d)\n",
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                __FILE__, __LINE__, class, index);
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#endif
185 
 
186 
        for (devnr = 0; (devnr < 32); devnr++) {
187 
                pcibios_read_config_dword(0, devnr, PCI_CLASS_REVISION, &val);
188 
                if ((val >> 8) == class) {
189 
                        if (index-- == 0) {
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                                *bus = 0;
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                                *dev = devnr;
192 
                                return(PCIBIOS_SUCCESSFUL);
193 
                        }
194 
                }
195 
        }
196 
 
197 
        return(PCIBIOS_DEVICE_NOT_FOUND);
198 
}
199 
 
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/*****************************************************************************/
201 
#endif  /* CONFIG_PCI */

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