diff options
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/Makefile.inc | 1 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/pci.c | 92 |
2 files changed, 93 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/Makefile.inc b/payloads/libpayload/drivers/Makefile.inc index 746ba45255..9a8d2d8448 100644 --- a/payloads/libpayload/drivers/Makefile.inc +++ b/payloads/libpayload/drivers/Makefile.inc @@ -27,6 +27,7 @@ ## OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ## SUCH DAMAGE. ## +TARGETS-y += drivers/pci.o TARGETS-$(CONFIG_SERIAL_CONSOLE) += drivers/serial.o TARGETS-$(CONFIG_PC_KEYBOARD) += drivers/keyboard.o diff --git a/payloads/libpayload/drivers/pci.c b/payloads/libpayload/drivers/pci.c new file mode 100644 index 0000000000..c6f48dd987 --- /dev/null +++ b/payloads/libpayload/drivers/pci.c @@ -0,0 +1,92 @@ +/* + * This file is part of the libpayload project. + * + * Copyright (C) 2008 Advanced Micro Devices, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <libpayload.h> +#include <pci.h> + +static int find_on_bus(int bus, unsigned short vid, unsigned short did, + pcidev_t * dev) +{ + int devfn; + unsigned int val; + unsigned char hdr; + + for (devfn = 0; devfn < 0x100; devfn++) { + pci_read_dword(bus, devfn, REG_VENDOR_ID, &val); + + if (val == 0xffffffff || val == 0x00000000 || + val == 0x0000ffff || val == 0xffff0000) + continue; + + if (val == ((did << 16) | vid)) { + *dev = PCIDEV(bus, devfn); + return 1; + } + + pci_read_byte(bus, devfn, REG_HEADER_TYPE, &hdr); + + hdr &= 0x7F; + + if (hdr == HEADER_TYPE_BRIDGE || hdr == HEADER_TYPE_CARDBUS) { + unsigned int busses; + pci_read_dword(bus, devfn, REG_PRIMARY_BUS, &busses); + if (find_on_bus((busses >> 8) & 0xFF, vid, did, dev)) + return 1; + } + } + + return 0; +} + +void pci_read_dword(unsigned int bus, unsigned int devfn, + unsigned int reg, unsigned int *val) +{ + outl(PCI_ADDR(bus, devfn, reg), 0xCF8); + *val = inl(0xCFC); +} + +void pci_read_byte(unsigned int bus, unsigned int devfn, + unsigned int reg, unsigned char *val) +{ + outl(PCI_ADDR(bus, devfn, reg), 0xCF8); + *val = inb(0xCFC + (reg & 3)); +} + +int pci_find_device(unsigned short vid, unsigned short did, pcidev_t * dev) +{ + return find_on_bus(0, vid, did, dev); +} + +unsigned int pci_read_resource(pcidev_t dev, int bar) +{ + unsigned int val; + pci_read_dword(PCIDEV_BUS(dev), PCIDEV_DEVFN(dev), 0x10 + (bar * 4), + &val); + return val; +} |