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Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/sysdev/ppc4xx_msi.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/sysdev/ppc4xx_msi.c277
1 files changed, 0 insertions, 277 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/ppc4xx_msi.c b/ANDROID_3.4.5/arch/powerpc/sysdev/ppc4xx_msi.c
deleted file mode 100644
index 1c2d7af1..00000000
--- a/ANDROID_3.4.5/arch/powerpc/sysdev/ppc4xx_msi.c
+++ /dev/null
@@ -1,277 +0,0 @@
-/*
- * Adding PCI-E MSI support for PPC4XX SoCs.
- *
- * Copyright (c) 2010, Applied Micro Circuits Corporation
- * Authors: Tirumala R Marri <tmarri@apm.com>
- * Feng Kan <fkan@apm.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 program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * 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., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <linux/irq.h>
-#include <linux/bootmem.h>
-#include <linux/pci.h>
-#include <linux/msi.h>
-#include <linux/of_platform.h>
-#include <linux/interrupt.h>
-#include <linux/export.h>
-#include <asm/prom.h>
-#include <asm/hw_irq.h>
-#include <asm/ppc-pci.h>
-#include <boot/dcr.h>
-#include <asm/dcr-regs.h>
-#include <asm/msi_bitmap.h>
-
-#define PEIH_TERMADH 0x00
-#define PEIH_TERMADL 0x08
-#define PEIH_MSIED 0x10
-#define PEIH_MSIMK 0x18
-#define PEIH_MSIASS 0x20
-#define PEIH_FLUSH0 0x30
-#define PEIH_FLUSH1 0x38
-#define PEIH_CNTRST 0x48
-#define NR_MSI_IRQS 4
-
-struct ppc4xx_msi {
- u32 msi_addr_lo;
- u32 msi_addr_hi;
- void __iomem *msi_regs;
- int msi_virqs[NR_MSI_IRQS];
- struct msi_bitmap bitmap;
- struct device_node *msi_dev;
-};
-
-static struct ppc4xx_msi ppc4xx_msi;
-
-static int ppc4xx_msi_init_allocator(struct platform_device *dev,
- struct ppc4xx_msi *msi_data)
-{
- int err;
-
- err = msi_bitmap_alloc(&msi_data->bitmap, NR_MSI_IRQS,
- dev->dev.of_node);
- if (err)
- return err;
-
- err = msi_bitmap_reserve_dt_hwirqs(&msi_data->bitmap);
- if (err < 0) {
- msi_bitmap_free(&msi_data->bitmap);
- return err;
- }
-
- return 0;
-}
-
-static int ppc4xx_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
-{
- int int_no = -ENOMEM;
- unsigned int virq;
- struct msi_msg msg;
- struct msi_desc *entry;
- struct ppc4xx_msi *msi_data = &ppc4xx_msi;
-
- list_for_each_entry(entry, &dev->msi_list, list) {
- int_no = msi_bitmap_alloc_hwirqs(&msi_data->bitmap, 1);
- if (int_no >= 0)
- break;
- if (int_no < 0) {
- pr_debug("%s: fail allocating msi interrupt\n",
- __func__);
- }
- virq = irq_of_parse_and_map(msi_data->msi_dev, int_no);
- if (virq == NO_IRQ) {
- dev_err(&dev->dev, "%s: fail mapping irq\n", __func__);
- msi_bitmap_free_hwirqs(&msi_data->bitmap, int_no, 1);
- return -ENOSPC;
- }
- dev_dbg(&dev->dev, "%s: virq = %d\n", __func__, virq);
-
- /* Setup msi address space */
- msg.address_hi = msi_data->msi_addr_hi;
- msg.address_lo = msi_data->msi_addr_lo;
-
- irq_set_msi_desc(virq, entry);
- msg.data = int_no;
- write_msi_msg(virq, &msg);
- }
- return 0;
-}
-
-void ppc4xx_teardown_msi_irqs(struct pci_dev *dev)
-{
- struct msi_desc *entry;
- struct ppc4xx_msi *msi_data = &ppc4xx_msi;
-
- dev_dbg(&dev->dev, "PCIE-MSI: tearing down msi irqs\n");
-
- list_for_each_entry(entry, &dev->msi_list, list) {
- if (entry->irq == NO_IRQ)
- continue;
- irq_set_msi_desc(entry->irq, NULL);
- msi_bitmap_free_hwirqs(&msi_data->bitmap,
- virq_to_hw(entry->irq), 1);
- irq_dispose_mapping(entry->irq);
- }
-}
-
-static int ppc4xx_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
- dev_dbg(&pdev->dev, "PCIE-MSI:%s called. vec %x type %d\n",
- __func__, nvec, type);
- if (type == PCI_CAP_ID_MSIX)
- pr_debug("ppc4xx msi: MSI-X untested, trying anyway.\n");
-
- return 0;
-}
-
-static int ppc4xx_setup_pcieh_hw(struct platform_device *dev,
- struct resource res, struct ppc4xx_msi *msi)
-{
- const u32 *msi_data;
- const u32 *msi_mask;
- const u32 *sdr_addr;
- dma_addr_t msi_phys;
- void *msi_virt;
-
- sdr_addr = of_get_property(dev->dev.of_node, "sdr-base", NULL);
- if (!sdr_addr)
- return -1;
-
- SDR0_WRITE(sdr_addr, (u64)res.start >> 32); /*HIGH addr */
- SDR0_WRITE(sdr_addr + 1, res.start & 0xFFFFFFFF); /* Low addr */
-
-
- msi->msi_dev = of_find_node_by_name(NULL, "ppc4xx-msi");
- if (msi->msi_dev)
- return -ENODEV;
-
- msi->msi_regs = of_iomap(msi->msi_dev, 0);
- if (!msi->msi_regs) {
- dev_err(&dev->dev, "of_iomap problem failed\n");
- return -ENOMEM;
- }
- dev_dbg(&dev->dev, "PCIE-MSI: msi register mapped 0x%x 0x%x\n",
- (u32) (msi->msi_regs + PEIH_TERMADH), (u32) (msi->msi_regs));
-
- msi_virt = dma_alloc_coherent(&dev->dev, 64, &msi_phys, GFP_KERNEL);
- msi->msi_addr_hi = 0x0;
- msi->msi_addr_lo = (u32) msi_phys;
- dev_dbg(&dev->dev, "PCIE-MSI: msi address 0x%x\n", msi->msi_addr_lo);
-
- /* Progam the Interrupt handler Termination addr registers */
- out_be32(msi->msi_regs + PEIH_TERMADH, msi->msi_addr_hi);
- out_be32(msi->msi_regs + PEIH_TERMADL, msi->msi_addr_lo);
-
- msi_data = of_get_property(dev->dev.of_node, "msi-data", NULL);
- if (!msi_data)
- return -1;
- msi_mask = of_get_property(dev->dev.of_node, "msi-mask", NULL);
- if (!msi_mask)
- return -1;
- /* Program MSI Expected data and Mask bits */
- out_be32(msi->msi_regs + PEIH_MSIED, *msi_data);
- out_be32(msi->msi_regs + PEIH_MSIMK, *msi_mask);
-
- return 0;
-}
-
-static int ppc4xx_of_msi_remove(struct platform_device *dev)
-{
- struct ppc4xx_msi *msi = dev->dev.platform_data;
- int i;
- int virq;
-
- for (i = 0; i < NR_MSI_IRQS; i++) {
- virq = msi->msi_virqs[i];
- if (virq != NO_IRQ)
- irq_dispose_mapping(virq);
- }
-
- if (msi->bitmap.bitmap)
- msi_bitmap_free(&msi->bitmap);
- iounmap(msi->msi_regs);
- of_node_put(msi->msi_dev);
- kfree(msi);
-
- return 0;
-}
-
-static int __devinit ppc4xx_msi_probe(struct platform_device *dev)
-{
- struct ppc4xx_msi *msi;
- struct resource res;
- int err = 0;
-
- msi = &ppc4xx_msi;/*keep the msi data for further use*/
-
- dev_dbg(&dev->dev, "PCIE-MSI: Setting up MSI support...\n");
-
- msi = kzalloc(sizeof(struct ppc4xx_msi), GFP_KERNEL);
- if (!msi) {
- dev_err(&dev->dev, "No memory for MSI structure\n");
- return -ENOMEM;
- }
- dev->dev.platform_data = msi;
-
- /* Get MSI ranges */
- err = of_address_to_resource(dev->dev.of_node, 0, &res);
- if (err) {
- dev_err(&dev->dev, "%s resource error!\n",
- dev->dev.of_node->full_name);
- goto error_out;
- }
-
- if (ppc4xx_setup_pcieh_hw(dev, res, msi))
- goto error_out;
-
- err = ppc4xx_msi_init_allocator(dev, msi);
- if (err) {
- dev_err(&dev->dev, "Error allocating MSI bitmap\n");
- goto error_out;
- }
-
- ppc_md.setup_msi_irqs = ppc4xx_setup_msi_irqs;
- ppc_md.teardown_msi_irqs = ppc4xx_teardown_msi_irqs;
- ppc_md.msi_check_device = ppc4xx_msi_check_device;
- return err;
-
-error_out:
- ppc4xx_of_msi_remove(dev);
- return err;
-}
-static const struct of_device_id ppc4xx_msi_ids[] = {
- {
- .compatible = "amcc,ppc4xx-msi",
- },
- {}
-};
-static struct platform_driver ppc4xx_msi_driver = {
- .probe = ppc4xx_msi_probe,
- .remove = ppc4xx_of_msi_remove,
- .driver = {
- .name = "ppc4xx-msi",
- .owner = THIS_MODULE,
- .of_match_table = ppc4xx_msi_ids,
- },
-
-};
-
-static __init int ppc4xx_msi_init(void)
-{
- return platform_driver_register(&ppc4xx_msi_driver);
-}
-
-subsys_initcall(ppc4xx_msi_init);
generated by cgit (git 2.34.1) at 2025-01-11 06:52:19 +0000