diff options
Diffstat (limited to 'arch/mips/pci/pci-xlr.c')
| -rw-r--r-- | arch/mips/pci/pci-xlr.c | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/arch/mips/pci/pci-xlr.c b/arch/mips/pci/pci-xlr.c deleted file mode 100644 index 2a1c81a129ba..000000000000 --- a/arch/mips/pci/pci-xlr.c +++ /dev/null @@ -1,368 +0,0 @@ -/* - * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights - * reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the NetLogic - * license below: - * - * 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. - * - * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``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 NETLOGIC 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 <linux/types.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/msi.h> -#include <linux/mm.h> -#include <linux/irq.h> -#include <linux/irqdesc.h> -#include <linux/console.h> -#include <linux/pci_regs.h> - -#include <asm/io.h> - -#include <asm/netlogic/interrupt.h> -#include <asm/netlogic/haldefs.h> -#include <asm/netlogic/common.h> - -#include <asm/netlogic/xlr/msidef.h> -#include <asm/netlogic/xlr/iomap.h> -#include <asm/netlogic/xlr/pic.h> -#include <asm/netlogic/xlr/xlr.h> - -static void *pci_config_base; - -#define pci_cfg_addr(bus, devfn, off) (((bus) << 16) | ((devfn) << 8) | (off)) - -/* PCI ops */ -static inline u32 pci_cfg_read_32bit(struct pci_bus *bus, unsigned int devfn, - int where) -{ - u32 data; - u32 *cfgaddr; - - cfgaddr = (u32 *)(pci_config_base + - pci_cfg_addr(bus->number, devfn, where & ~3)); - data = *cfgaddr; - return cpu_to_le32(data); -} - -static inline void pci_cfg_write_32bit(struct pci_bus *bus, unsigned int devfn, - int where, u32 data) -{ - u32 *cfgaddr; - - cfgaddr = (u32 *)(pci_config_base + - pci_cfg_addr(bus->number, devfn, where & ~3)); - *cfgaddr = cpu_to_le32(data); -} - -static int nlm_pcibios_read(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 *val) -{ - u32 data; - - if ((size == 2) && (where & 1)) - return PCIBIOS_BAD_REGISTER_NUMBER; - else if ((size == 4) && (where & 3)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - data = pci_cfg_read_32bit(bus, devfn, where); - - 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 nlm_pcibios_write(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 val) -{ - u32 data; - - if ((size == 2) && (where & 1)) - return PCIBIOS_BAD_REGISTER_NUMBER; - else if ((size == 4) && (where & 3)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - data = pci_cfg_read_32bit(bus, devfn, where); - - 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)); - else - data = val; - - pci_cfg_write_32bit(bus, devfn, where, data); - - return PCIBIOS_SUCCESSFUL; -} - -struct pci_ops nlm_pci_ops = { - .read = nlm_pcibios_read, - .write = nlm_pcibios_write -}; - -static struct resource nlm_pci_mem_resource = { - .name = "XLR PCI MEM", - .start = 0xd0000000UL, /* 256MB PCI mem @ 0xd000_0000 */ - .end = 0xdfffffffUL, - .flags = IORESOURCE_MEM, -}; - -static struct resource nlm_pci_io_resource = { - .name = "XLR IO MEM", - .start = 0x10000000UL, /* 16MB PCI IO @ 0x1000_0000 */ - .end = 0x100fffffUL, - .flags = IORESOURCE_IO, -}; - -struct pci_controller nlm_pci_controller = { - .index = 0, - .pci_ops = &nlm_pci_ops, - .mem_resource = &nlm_pci_mem_resource, - .mem_offset = 0x00000000UL, - .io_resource = &nlm_pci_io_resource, - .io_offset = 0x00000000UL, -}; - -/* - * The top level PCIe links on the XLS PCIe controller appear as - * bridges. Given a device, this function finds which link it is - * on. - */ -static struct pci_dev *xls_get_pcie_link(const struct pci_dev *dev) -{ - struct pci_bus *bus, *p; - - /* Find the bridge on bus 0 */ - bus = dev->bus; - for (p = bus->parent; p && p->number != 0; p = p->parent) - bus = p; - - return p ? bus->self : NULL; -} - -static int nlm_pci_link_to_irq(int link) -{ - switch (link) { - case 0: - return PIC_PCIE_LINK0_IRQ; - case 1: - return PIC_PCIE_LINK1_IRQ; - case 2: - if (nlm_chip_is_xls_b()) - return PIC_PCIE_XLSB0_LINK2_IRQ; - else - return PIC_PCIE_LINK2_IRQ; - case 3: - if (nlm_chip_is_xls_b()) - return PIC_PCIE_XLSB0_LINK3_IRQ; - else - return PIC_PCIE_LINK3_IRQ; - } - WARN(1, "Unexpected link %d\n", link); - return 0; -} - -static int get_irq_vector(const struct pci_dev *dev) -{ - struct pci_dev *lnk; - int link; - - if (!nlm_chip_is_xls()) - return PIC_PCIX_IRQ; /* for XLR just one IRQ */ - - lnk = xls_get_pcie_link(dev); - if (lnk == NULL) - return 0; - - link = PCI_SLOT(lnk->devfn); - return nlm_pci_link_to_irq(link); -} - -#ifdef CONFIG_PCI_MSI -void arch_teardown_msi_irq(unsigned int irq) -{ -} - -int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) -{ - struct msi_msg msg; - struct pci_dev *lnk; - int irq, ret; - u16 val; - - /* MSI not supported on XLR */ - if (!nlm_chip_is_xls()) - return 1; - - /* - * Enable MSI on the XLS PCIe controller bridge which was disabled - * at enumeration, the bridge MSI capability is at 0x50 - */ - lnk = xls_get_pcie_link(dev); - if (lnk == NULL) - return 1; - - pci_read_config_word(lnk, 0x50 + PCI_MSI_FLAGS, &val); - if ((val & PCI_MSI_FLAGS_ENABLE) == 0) { - val |= PCI_MSI_FLAGS_ENABLE; - pci_write_config_word(lnk, 0x50 + PCI_MSI_FLAGS, val); - } - - irq = get_irq_vector(dev); - if (irq <= 0) - return 1; - - msg.address_hi = MSI_ADDR_BASE_HI; - msg.address_lo = MSI_ADDR_BASE_LO | - MSI_ADDR_DEST_MODE_PHYSICAL | - MSI_ADDR_REDIRECTION_CPU; - - msg.data = MSI_DATA_TRIGGER_EDGE | - MSI_DATA_LEVEL_ASSERT | - MSI_DATA_DELIVERY_FIXED; - - ret = irq_set_msi_desc(irq, desc); - if (ret < 0) - return ret; - - pci_write_msi_msg(irq, &msg); - return 0; -} -#endif - -/* Extra ACK needed for XLR on chip PCI controller */ -static void xlr_pci_ack(struct irq_data *d) -{ - uint64_t pcibase = nlm_mmio_base(NETLOGIC_IO_PCIX_OFFSET); - - nlm_read_reg(pcibase, (0x140 >> 2)); -} - -/* Extra ACK needed for XLS on chip PCIe controller */ -static void xls_pcie_ack(struct irq_data *d) -{ - uint64_t pciebase_le = nlm_mmio_base(NETLOGIC_IO_PCIE_1_OFFSET); - - switch (d->irq) { - case PIC_PCIE_LINK0_IRQ: - nlm_write_reg(pciebase_le, (0x90 >> 2), 0xffffffff); - break; - case PIC_PCIE_LINK1_IRQ: - nlm_write_reg(pciebase_le, (0x94 >> 2), 0xffffffff); - break; - case PIC_PCIE_LINK2_IRQ: - nlm_write_reg(pciebase_le, (0x190 >> 2), 0xffffffff); - break; - case PIC_PCIE_LINK3_IRQ: - nlm_write_reg(pciebase_le, (0x194 >> 2), 0xffffffff); - break; - } -} - -/* For XLS B silicon, the 3,4 PCI interrupts are different */ -static void xls_pcie_ack_b(struct irq_data *d) -{ - uint64_t pciebase_le = nlm_mmio_base(NETLOGIC_IO_PCIE_1_OFFSET); - - switch (d->irq) { - case PIC_PCIE_LINK0_IRQ: - nlm_write_reg(pciebase_le, (0x90 >> 2), 0xffffffff); - break; - case PIC_PCIE_LINK1_IRQ: - nlm_write_reg(pciebase_le, (0x94 >> 2), 0xffffffff); - break; - case PIC_PCIE_XLSB0_LINK2_IRQ: - nlm_write_reg(pciebase_le, (0x190 >> 2), 0xffffffff); - break; - case PIC_PCIE_XLSB0_LINK3_IRQ: - nlm_write_reg(pciebase_le, (0x194 >> 2), 0xffffffff); - break; - } -} - -int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) -{ - return get_irq_vector(dev); -} - -/* Do platform specific device initialization at pci_enable_device() time */ -int pcibios_plat_dev_init(struct pci_dev *dev) -{ - return 0; -} - -static int __init pcibios_init(void) -{ - void (*extra_ack)(struct irq_data *); - int link, irq; - - /* PSB assigns PCI resources */ - pci_set_flags(PCI_PROBE_ONLY); - pci_config_base = ioremap(DEFAULT_PCI_CONFIG_BASE, 16 << 20); - - /* Extend IO port for memory mapped io */ - ioport_resource.start = 0; - ioport_resource.end = ~0; - - set_io_port_base(CKSEG1); - nlm_pci_controller.io_map_base = CKSEG1; - - pr_info("Registering XLR/XLS PCIX/PCIE Controller.\n"); - register_pci_controller(&nlm_pci_controller); - - /* - * For PCI interrupts, we need to ack the PCI controller too, overload - * irq handler data to do this - */ - if (!nlm_chip_is_xls()) { - /* XLR PCI controller ACK */ - nlm_set_pic_extra_ack(0, PIC_PCIX_IRQ, xlr_pci_ack); - } else { - if (nlm_chip_is_xls_b()) - extra_ack = xls_pcie_ack_b; - else - extra_ack = xls_pcie_ack; - for (link = 0; link < 4; link++) { - irq = nlm_pci_link_to_irq(link); - nlm_set_pic_extra_ack(0, irq, extra_ack); - } - } - return 0; -} - -arch_initcall(pcibios_init); |