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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/pci/ops-titan.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/mips/pci/ops-titan.c')
-rw-r--r-- | arch/mips/pci/ops-titan.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/mips/pci/ops-titan.c b/arch/mips/pci/ops-titan.c new file mode 100644 index 000000000000..233ec6f2054d --- /dev/null +++ b/arch/mips/pci/ops-titan.c @@ -0,0 +1,100 @@ +/* + * Copyright 2003 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``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 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> + +#include <asm/titan_dep.h> + +static int titan_read_config(struct pci_bus *bus, unsigned int devfn, int reg, + int size, u32 * val) +{ + uint32_t address, tmp; + int dev, busno, func; + + busno = bus->number; + dev = PCI_SLOT(devfn); + func = PCI_FUNC(devfn); + + address = (busno << 16) | (dev << 11) | (func << 8) | + (reg & 0xfc) | 0x80000000; + + + /* start the configuration cycle */ + TITAN_WRITE(TITAN_PCI_0_CONFIG_ADDRESS, address); + tmp = TITAN_READ(TITAN_PCI_0_CONFIG_DATA) >> ((reg & 3) << 3); + + switch (size) { + case 1: + tmp &= 0xff; + case 2: + tmp &= 0xffff; + } + *val = tmp; + + return PCIBIOS_SUCCESSFUL; +} + +static int titan_write_config(struct pci_bus *bus, unsigned int devfn, int reg, + int size, u32 val) +{ + uint32_t address; + int dev, busno, func; + + busno = bus->number; + dev = PCI_SLOT(devfn); + func = PCI_FUNC(devfn); + + address = (busno << 16) | (dev << 11) | (func << 8) | + (reg & 0xfc) | 0x80000000; + + /* start the configuration cycle */ + TITAN_WRITE(TITAN_PCI_0_CONFIG_ADDRESS, address); + + /* write the data */ + switch (size) { + case 1: + TITAN_WRITE_8(TITAN_PCI_0_CONFIG_DATA + (~reg & 0x3), val); + break; + + case 2: + TITAN_WRITE_16(TITAN_PCI_0_CONFIG_DATA + (~reg & 0x2), val); + break; + + case 4: + TITAN_WRITE(TITAN_PCI_0_CONFIG_DATA, val); + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +/* + * Titan PCI structure + */ +struct pci_ops titan_pci_ops = { + titan_read_config, + titan_write_config, +}; |