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added code to write configuration registers

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This commit is contained in:
Markus Fröschle
2013-10-27 17:36:21 +00:00
parent 9f332114f0
commit f7b68f912c
1 changed files with 52 additions and 84 deletions
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136
sources/pci.c
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@@ -73,90 +73,6 @@ static char *device_class(int classcode)
return "not found"; return "not found";
} }
uint16_t pci_read_config_byte(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset)
{
uint8_t value;
/* clear PCI status/command register */
MCF_PCI_PCISCR = MCF_PCI_PCISCR_PE | /* clear parity error bit */
MCF_PCI_PCISCR_SE | /* clear system error */
MCF_PCI_PCISCR_MA | /* clear master abort */
MCF_PCI_PCISCR_TR | /* clear target abort */
MCF_PCI_PCISCR_TS | /* clear target abort signalling (as target) */
MCF_PCI_PCISCR_DP; /* clear parity error */
//(void) MCF_PCI_PCISCR;
wait(1000);
/* initiate PCI configuration access to device */
MCF_PCI_PCICAR = MCF_PCI_PCICAR_E | /* enable configuration access special cycle */
MCF_PCI_PCICAR_DEVNUM(slot) | /* device number, devices 0 - 9 are reserved */
MCF_PCI_PCICAR_FUNCNUM(function) | /* function number */
MCF_PCI_PCICAR_DWORD(offset * 2);
wait(1000);
value = * (volatile uint16_t *) PCI_IO_OFFSET; /* access device */
#ifdef _NOT_USED_
/* finish config cycle */
MCF_PCI_PCICAR = MCF_PCI_PCICAR_E |
MCF_PCI_PCICAR_BUSNUM(bus) |
MCF_PCI_PCICAR_DEVNUM(slot) |
MCF_PCI_PCICAR_FUNCNUM(function) |
MCF_PCI_PCICAR_DWORD(0);
#endif /* _NOT_USED_ */
swpw(value);
return value;
}
uint16_t pci_read_config_word(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset)
{
uint16_t value;
/* clear PCI status/command register */
MCF_PCI_PCISCR = MCF_PCI_PCISCR_PE | /* clear parity error bit */
MCF_PCI_PCISCR_SE | /* clear system error */
MCF_PCI_PCISCR_MA | /* clear master abort */
MCF_PCI_PCISCR_TR | /* clear target abort */
MCF_PCI_PCISCR_TS | /* clear target abort signalling (as target) */
MCF_PCI_PCISCR_DP; /* clear parity error */
//(void) MCF_PCI_PCISCR;
wait(1000);
/* initiate PCI configuration access to device */
MCF_PCI_PCICAR = MCF_PCI_PCICAR_E | /* enable configuration access special cycle */
MCF_PCI_PCICAR_DEVNUM(slot) | /* device number, devices 0 - 9 are reserved */
MCF_PCI_PCICAR_FUNCNUM(function) | /* function number */
MCF_PCI_PCICAR_DWORD(offset);
wait(1000);
value = * (volatile uint16_t *) PCI_IO_OFFSET; /* access device */
#ifdef _NOT_USED_
/* finish config cycle */
MCF_PCI_PCICAR = MCF_PCI_PCICAR_E |
MCF_PCI_PCICAR_BUSNUM(bus) |
MCF_PCI_PCICAR_DEVNUM(slot) |
MCF_PCI_PCICAR_FUNCNUM(function) |
MCF_PCI_PCICAR_DWORD(0);
#endif /* _NOT_USED_ */
swpw(value);
return value;
}
uint32_t pci_read_config_longword(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset) uint32_t pci_read_config_longword(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset)
{ {
uint32_t value; uint32_t value;
@@ -199,6 +115,58 @@ uint32_t pci_read_config_longword(uint16_t bus, uint16_t slot, uint16_t function
return value; return value;
} }
uint16_t pci_read_config_word(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset)
{
uint32_t value;
value = pci_read_config_longword(bus, slot, function, offset / 2);
return((value >> (1 - offset % 2) * 8) & 0xffff);
}
uint8_t pci_read_config_byte(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset)
{
uint32_t value;
value = pci_read_config_longword(bus, slot, function, offset / 4);
return ((value >> (3 - offset % 4) * 8) & 0xff);
}
void pci_write_config_longword(uint16_t bus, uint16_t slot, uint16_t function, uint16_t offset, uint32_t value)
{
/* clear PCI status/command register */
MCF_PCI_PCISCR = MCF_PCI_PCISCR_PE | /* clear parity error bit */
MCF_PCI_PCISCR_SE | /* clear system error */
MCF_PCI_PCISCR_MA | /* clear master abort */
MCF_PCI_PCISCR_TR | /* clear target abort */
MCF_PCI_PCISCR_TS | /* clear target abort signalling (as target) */
MCF_PCI_PCISCR_DP; /* clear parity error */
//(void) MCF_PCI_PCISCR;
wait(1000);
//xprintf("PCISCR before config cycle: %lx\r\n", MCF_PCI_PCISCR);
/* initiate PCI configuration access to device */
MCF_PCI_PCICAR = MCF_PCI_PCICAR_E | /* enable configuration access special cycle */
MCF_PCI_PCICAR_BUSNUM(bus) |
MCF_PCI_PCICAR_DEVNUM(slot) | /* device number, devices 0 - 9 are reserved */
MCF_PCI_PCICAR_FUNCNUM(function) | /* function number */
MCF_PCI_PCICAR_DWORD(offset / 4);
wait(1000);
swpl(value);
* (volatile uint32_t *) PCI_IO_OFFSET = value; /* access device */
#ifdef _NOT_USED_
/* finish config cycle */
MCF_PCI_PCICAR = MCF_PCI_PCICAR_DEVNUM(10) |
MCF_PCI_PCICAR_FUNCNUM(function) |
MCF_PCI_PCICAR_DWORD(0);
#endif /* _NOT_USED_ */
}
void pci_scan(void) void pci_scan(void)
{ {
uint16_t bus; uint16_t bus;