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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/pci/ops-titan-ht.c | |
download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
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-ht.c')
-rw-r--r-- | arch/mips/pci/ops-titan-ht.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/mips/pci/ops-titan-ht.c b/arch/mips/pci/ops-titan-ht.c new file mode 100644 index 000000000000..46c636c27e06 --- /dev/null +++ b/arch/mips/pci/ops-titan-ht.c @@ -0,0 +1,125 @@ +/* + * 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 <linux/slab.h> +#include <linux/delay.h> +#include <asm/io.h> + +#include <asm/titan_dep.h> + +static int titan_ht_config_read_dword(struct pci_bus *bus, unsigned int devfn, + int offset, u32 * val) +{ + volatile uint32_t address; + int busno; + + busno = bus->number; + + address = (busno << 16) | (devfn << 8) | (offset & 0xfc) | 0x80000000; + if (busno != 0) + address |= 1; + + /* + * RM9000 HT Errata: Issue back to back HT config + * transcations. Issue a BIU sync before and + * after the HT cycle + */ + + *(volatile int32_t *) 0xfb0000f0 |= 0x2; + + udelay(30); + + *(volatile int32_t *) 0xfb0006f8 = address; + *(val) = *(volatile int32_t *) 0xfb0006fc; + + udelay(30); + + * (volatile int32_t *) 0xfb0000f0 |= 0x2; + + return PCIBIOS_SUCCESSFUL; +} + +static int titan_ht_config_read(struct pci_bus *bus, unsigned int devfn, + int offset, int size, u32 * val) +{ + uint32_t dword; + + titan_ht_config_read_dword(bus, devfn, offset, &dword); + + dword >>= ((offset & 3) << 3); + dword &= (0xffffffffU >> ((4 - size) << 8)); + + return PCIBIOS_SUCCESSFUL; +} + +static inline int titan_ht_config_write_dword(struct pci_bus *bus, + unsigned int devfn, int offset, u32 val) +{ + volatile uint32_t address; + int busno; + + busno = bus->number; + + address = (busno << 16) | (devfn << 8) | (offset & 0xfc) | 0x80000000; + if (busno != 0) + address |= 1; + + *(volatile int32_t *) 0xfb0000f0 |= 0x2; + + udelay(30); + + *(volatile int32_t *) 0xfb0006f8 = address; + *(volatile int32_t *) 0xfb0006fc = val; + + udelay(30); + + *(volatile int32_t *) 0xfb0000f0 |= 0x2; + + return PCIBIOS_SUCCESSFUL; +} + +static int titan_ht_config_write(struct pci_bus *bus, unsigned int devfn, + int offset, int size, u32 val) +{ + uint32_t val1, val2, mask; + + titan_ht_config_read_dword(bus, devfn, offset, &val2); + + val1 = val << ((offset & 3) << 3); + mask = ~(0xffffffffU >> ((4 - size) << 8)); + val2 &= ~(mask << ((offset & 3) << 8)); + + titan_ht_config_write_dword(bus, devfn, offset, val1 | val2); + + return PCIBIOS_SUCCESSFUL; +} + +struct pci_ops titan_ht_pci_ops = { + .read = titan_ht_config_read, + .write = titan_ht_config_write, +}; |