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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/powerpc/sysdev/mpic_u3msi.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/sysdev/mpic_u3msi.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/sysdev/mpic_u3msi.c208
1 files changed, 0 insertions, 208 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/mpic_u3msi.c b/ANDROID_3.4.5/arch/powerpc/sysdev/mpic_u3msi.c
deleted file mode 100644
index 9a7aa0ed..00000000
--- a/ANDROID_3.4.5/arch/powerpc/sysdev/mpic_u3msi.c
+++ /dev/null
@@ -1,208 +0,0 @@
-/*
- * Copyright 2006, Segher Boessenkool, IBM Corporation.
- * Copyright 2006-2007, Michael Ellerman, IBM Corporation.
- *
- * 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; version 2 of the
- * License.
- *
- */
-
-#include <linux/irq.h>
-#include <linux/bootmem.h>
-#include <linux/msi.h>
-#include <asm/mpic.h>
-#include <asm/prom.h>
-#include <asm/hw_irq.h>
-#include <asm/ppc-pci.h>
-#include <asm/msi_bitmap.h>
-
-#include "mpic.h"
-
-/* A bit ugly, can we get this from the pci_dev somehow? */
-static struct mpic *msi_mpic;
-
-static void mpic_u3msi_mask_irq(struct irq_data *data)
-{
- mask_msi_irq(data);
- mpic_mask_irq(data);
-}
-
-static void mpic_u3msi_unmask_irq(struct irq_data *data)
-{
- mpic_unmask_irq(data);
- unmask_msi_irq(data);
-}
-
-static struct irq_chip mpic_u3msi_chip = {
- .irq_shutdown = mpic_u3msi_mask_irq,
- .irq_mask = mpic_u3msi_mask_irq,
- .irq_unmask = mpic_u3msi_unmask_irq,
- .irq_eoi = mpic_end_irq,
- .irq_set_type = mpic_set_irq_type,
- .irq_set_affinity = mpic_set_affinity,
- .name = "MPIC-U3MSI",
-};
-
-static u64 read_ht_magic_addr(struct pci_dev *pdev, unsigned int pos)
-{
- u8 flags;
- u32 tmp;
- u64 addr;
-
- pci_read_config_byte(pdev, pos + HT_MSI_FLAGS, &flags);
-
- if (flags & HT_MSI_FLAGS_FIXED)
- return HT_MSI_FIXED_ADDR;
-
- pci_read_config_dword(pdev, pos + HT_MSI_ADDR_LO, &tmp);
- addr = tmp & HT_MSI_ADDR_LO_MASK;
- pci_read_config_dword(pdev, pos + HT_MSI_ADDR_HI, &tmp);
- addr = addr | ((u64)tmp << 32);
-
- return addr;
-}
-
-static u64 find_ht_magic_addr(struct pci_dev *pdev, unsigned int hwirq)
-{
- struct pci_bus *bus;
- unsigned int pos;
-
- for (bus = pdev->bus; bus && bus->self; bus = bus->parent) {
- pos = pci_find_ht_capability(bus->self, HT_CAPTYPE_MSI_MAPPING);
- if (pos)
- return read_ht_magic_addr(bus->self, pos);
- }
-
- return 0;
-}
-
-static u64 find_u4_magic_addr(struct pci_dev *pdev, unsigned int hwirq)
-{
- struct pci_controller *hose = pci_bus_to_host(pdev->bus);
-
- /* U4 PCIe MSIs need to write to the special register in
- * the bridge that generates interrupts. There should be
- * theorically a register at 0xf8005000 where you just write
- * the MSI number and that triggers the right interrupt, but
- * unfortunately, this is busted in HW, the bridge endian swaps
- * the value and hits the wrong nibble in the register.
- *
- * So instead we use another register set which is used normally
- * for converting HT interrupts to MPIC interrupts, which decodes
- * the interrupt number as part of the low address bits
- *
- * This will not work if we ever use more than one legacy MSI in
- * a block but we never do. For one MSI or multiple MSI-X where
- * each interrupt address can be specified separately, it works
- * just fine.
- */
- if (of_device_is_compatible(hose->dn, "u4-pcie") ||
- of_device_is_compatible(hose->dn, "U4-pcie"))
- return 0xf8004000 | (hwirq << 4);
-
- return 0;
-}
-
-static int u3msi_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
- if (type == PCI_CAP_ID_MSIX)
- pr_debug("u3msi: MSI-X untested, trying anyway.\n");
-
- /* If we can't find a magic address then MSI ain't gonna work */
- if (find_ht_magic_addr(pdev, 0) == 0 &&
- find_u4_magic_addr(pdev, 0) == 0) {
- pr_debug("u3msi: no magic address found for %s\n",
- pci_name(pdev));
- return -ENXIO;
- }
-
- return 0;
-}
-
-static void u3msi_teardown_msi_irqs(struct pci_dev *pdev)
-{
- struct msi_desc *entry;
-
- list_for_each_entry(entry, &pdev->msi_list, list) {
- if (entry->irq == NO_IRQ)
- continue;
-
- irq_set_msi_desc(entry->irq, NULL);
- msi_bitmap_free_hwirqs(&msi_mpic->msi_bitmap,
- virq_to_hw(entry->irq), 1);
- irq_dispose_mapping(entry->irq);
- }
-
- return;
-}
-
-static int u3msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
-{
- unsigned int virq;
- struct msi_desc *entry;
- struct msi_msg msg;
- u64 addr;
- int hwirq;
-
- list_for_each_entry(entry, &pdev->msi_list, list) {
- hwirq = msi_bitmap_alloc_hwirqs(&msi_mpic->msi_bitmap, 1);
- if (hwirq < 0) {
- pr_debug("u3msi: failed allocating hwirq\n");
- return hwirq;
- }
-
- addr = find_ht_magic_addr(pdev, hwirq);
- if (addr == 0)
- addr = find_u4_magic_addr(pdev, hwirq);
- msg.address_lo = addr & 0xFFFFFFFF;
- msg.address_hi = addr >> 32;
-
- virq = irq_create_mapping(msi_mpic->irqhost, hwirq);
- if (virq == NO_IRQ) {
- pr_debug("u3msi: failed mapping hwirq 0x%x\n", hwirq);
- msi_bitmap_free_hwirqs(&msi_mpic->msi_bitmap, hwirq, 1);
- return -ENOSPC;
- }
-
- irq_set_msi_desc(virq, entry);
- irq_set_chip(virq, &mpic_u3msi_chip);
- irq_set_irq_type(virq, IRQ_TYPE_EDGE_RISING);
-
- pr_debug("u3msi: allocated virq 0x%x (hw 0x%x) addr 0x%lx\n",
- virq, hwirq, (unsigned long)addr);
-
- printk("u3msi: allocated virq 0x%x (hw 0x%x) addr 0x%lx\n",
- virq, hwirq, (unsigned long)addr);
- msg.data = hwirq;
- write_msi_msg(virq, &msg);
-
- hwirq++;
- }
-
- return 0;
-}
-
-int mpic_u3msi_init(struct mpic *mpic)
-{
- int rc;
-
- rc = mpic_msi_init_allocator(mpic);
- if (rc) {
- pr_debug("u3msi: Error allocating bitmap!\n");
- return rc;
- }
-
- pr_debug("u3msi: Registering MPIC U3 MSI callbacks.\n");
-
- BUG_ON(msi_mpic);
- msi_mpic = mpic;
-
- WARN_ON(ppc_md.setup_msi_irqs);
- ppc_md.setup_msi_irqs = u3msi_setup_msi_irqs;
- ppc_md.teardown_msi_irqs = u3msi_teardown_msi_irqs;
- ppc_md.msi_check_device = u3msi_msi_check_device;
-
- return 0;
-}