diff options
Diffstat (limited to 'arch/mips/pci')
| -rw-r--r-- | arch/mips/pci/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/pci/fixup-loongson3.c | 66 | ||||
| -rw-r--r-- | arch/mips/pci/ops-loongson3.c | 101 |
3 files changed, 168 insertions, 0 deletions
diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile index 137f2a6feb25..d61138a177cc 100644 --- a/arch/mips/pci/Makefile +++ b/arch/mips/pci/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_LASAT) += pci-lasat.o obj-$(CONFIG_MIPS_COBALT) += fixup-cobalt.o obj-$(CONFIG_LEMOTE_FULOONG2E) += fixup-fuloong2e.o ops-loongson2.o obj-$(CONFIG_LEMOTE_MACH2F) += fixup-lemote2f.o ops-loongson2.o +obj-$(CONFIG_LEMOTE_MACH3A) += fixup-loongson3.o ops-loongson3.o obj-$(CONFIG_MIPS_MALTA) += fixup-malta.o pci-malta.o obj-$(CONFIG_PMC_MSP7120_GW) += fixup-pmcmsp.o ops-pmcmsp.o obj-$(CONFIG_PMC_MSP7120_EVAL) += fixup-pmcmsp.o ops-pmcmsp.o diff --git a/arch/mips/pci/fixup-loongson3.c b/arch/mips/pci/fixup-loongson3.c new file mode 100644 index 000000000000..d708ae46d325 --- /dev/null +++ b/arch/mips/pci/fixup-loongson3.c @@ -0,0 +1,66 @@ +/* + * fixup-loongson3.c + * + * Copyright (C) 2012 Lemote, Inc. + * Author: Xiang Yu, xiangy@lemote.com + * Chen Huacai, chenhc@lemote.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. + * + */ + +#include <linux/pci.h> +#include <boot_param.h> + +static void print_fixup_info(const struct pci_dev *pdev) +{ + dev_info(&pdev->dev, "Device %x:%x, irq %d\n", + pdev->vendor, pdev->device, pdev->irq); +} + +int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + print_fixup_info(dev); + return dev->irq; +} + +static void pci_fixup_radeon(struct pci_dev *pdev) +{ + if (pdev->resource[PCI_ROM_RESOURCE].start) + return; + + if (!loongson_sysconf.vgabios_addr) + return; + + pdev->resource[PCI_ROM_RESOURCE].start = + loongson_sysconf.vgabios_addr; + pdev->resource[PCI_ROM_RESOURCE].end = + loongson_sysconf.vgabios_addr + 256*1024 - 1; + pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_COPY; + + dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n", + PCI_ROM_RESOURCE, &pdev->resource[PCI_ROM_RESOURCE]); +} + +DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID, + PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon); + +/* Do platform specific device initialization at pci_enable_device() time */ +int pcibios_plat_dev_init(struct pci_dev *dev) +{ + return 0; +} diff --git a/arch/mips/pci/ops-loongson3.c b/arch/mips/pci/ops-loongson3.c new file mode 100644 index 000000000000..46ed541a3ec7 --- /dev/null +++ b/arch/mips/pci/ops-loongson3.c @@ -0,0 +1,101 @@ +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> + +#include <asm/mips-boards/bonito64.h> + +#include <loongson.h> + +#define PCI_ACCESS_READ 0 +#define PCI_ACCESS_WRITE 1 + +#define HT1LO_PCICFG_BASE 0x1a000000 +#define HT1LO_PCICFG_BASE_TP1 0x1b000000 + +static int loongson3_pci_config_access(unsigned char access_type, + struct pci_bus *bus, unsigned int devfn, + int where, u32 *data) +{ + unsigned char busnum = bus->number; + u_int64_t addr, type; + void *addrp; + int device = PCI_SLOT(devfn); + int function = PCI_FUNC(devfn); + int reg = where & ~3; + + addr = (busnum << 16) | (device << 11) | (function << 8) | reg; + if (busnum == 0) { + if (device > 31) + return PCIBIOS_DEVICE_NOT_FOUND; + addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE) | (addr & 0xffff)); + type = 0; + + } else { + addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE_TP1) | (addr)); + type = 0x10000; + } + + if (access_type == PCI_ACCESS_WRITE) + writel(*data, addrp); + else { + *data = readl(addrp); + if (*data == 0xffffffff) { + *data = -1; + return PCIBIOS_DEVICE_NOT_FOUND; + } + } + return PCIBIOS_SUCCESSFUL; +} + +static int loongson3_pci_pcibios_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + u32 data = 0; + int ret = loongson3_pci_config_access(PCI_ACCESS_READ, + bus, devfn, where, &data); + + if (ret != PCIBIOS_SUCCESSFUL) + return ret; + + if (size == 1) + *val = (data >> ((where & 3) << 3)) & 0xff; + else if (size == 2) + *val = (data >> ((where & 3) << 3)) & 0xffff; + else + *val = data; + + return PCIBIOS_SUCCESSFUL; +} + +static int loongson3_pci_pcibios_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + u32 data = 0; + int ret; + + if (size == 4) + data = val; + else { + ret = loongson3_pci_config_access(PCI_ACCESS_READ, + bus, devfn, where, &data); + if (ret != PCIBIOS_SUCCESSFUL) + return ret; + + if (size == 1) + data = (data & ~(0xff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + else if (size == 2) + data = (data & ~(0xffff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + } + + ret = loongson3_pci_config_access(PCI_ACCESS_WRITE, + bus, devfn, where, &data); + + return ret; +} + +struct pci_ops loongson_pci_ops = { + .read = loongson3_pci_pcibios_read, + .write = loongson3_pci_pcibios_write +}; |