diff options
Diffstat (limited to 'drivers/iommu/msm_iommu_dev.c')
| -rw-r--r-- | drivers/iommu/msm_iommu_dev.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/drivers/iommu/msm_iommu_dev.c b/drivers/iommu/msm_iommu_dev.c deleted file mode 100644 index be01cc47c285..000000000000 --- a/drivers/iommu/msm_iommu_dev.c +++ /dev/null @@ -1,212 +0,0 @@ -/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * 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., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/clk.h> -#include <linux/iommu.h> -#include <linux/interrupt.h> -#include <linux/err.h> -#include <linux/slab.h> - -#include "msm_iommu_hw-8xxx.h" -#include "msm_iommu.h" - -static void msm_iommu_reset(void __iomem *base, int ncb) -{ - int ctx; - - SET_RPUE(base, 0); - SET_RPUEIE(base, 0); - SET_ESRRESTORE(base, 0); - SET_TBE(base, 0); - SET_CR(base, 0); - SET_SPDMBE(base, 0); - SET_TESTBUSCR(base, 0); - SET_TLBRSW(base, 0); - SET_GLOBAL_TLBIALL(base, 0); - SET_RPU_ACR(base, 0); - SET_TLBLKCRWE(base, 1); - - for (ctx = 0; ctx < ncb; ctx++) { - SET_BPRCOSH(base, ctx, 0); - SET_BPRCISH(base, ctx, 0); - SET_BPRCNSH(base, ctx, 0); - SET_BPSHCFG(base, ctx, 0); - SET_BPMTCFG(base, ctx, 0); - SET_ACTLR(base, ctx, 0); - SET_SCTLR(base, ctx, 0); - SET_FSRRESTORE(base, ctx, 0); - SET_TTBR0(base, ctx, 0); - SET_TTBR1(base, ctx, 0); - SET_TTBCR(base, ctx, 0); - SET_BFBCR(base, ctx, 0); - SET_PAR(base, ctx, 0); - SET_FAR(base, ctx, 0); - SET_CTX_TLBIALL(base, ctx, 0); - SET_TLBFLPTER(base, ctx, 0); - SET_TLBSLPTER(base, ctx, 0); - SET_TLBLKCR(base, ctx, 0); - SET_PRRR(base, ctx, 0); - SET_NMRR(base, ctx, 0); - SET_CONTEXTIDR(base, ctx, 0); - } -} - -static int msm_iommu_probe(struct platform_device *pdev) -{ - struct resource *r; - struct msm_iommu_dev *iommu; - int ret, par, val; - - iommu = devm_kzalloc(&pdev->dev, sizeof(*iommu), GFP_KERNEL); - if (!iommu) - return -ENODEV; - - iommu->dev = &pdev->dev; - INIT_LIST_HEAD(&iommu->ctx_list); - - iommu->pclk = devm_clk_get(iommu->dev, "smmu_pclk"); - if (IS_ERR(iommu->pclk)) { - dev_err(iommu->dev, "could not get smmu_pclk\n"); - return PTR_ERR(iommu->pclk); - } - - ret = clk_prepare(iommu->pclk); - if (ret) { - dev_err(iommu->dev, "could not prepare smmu_pclk\n"); - return ret; - } - - iommu->clk = devm_clk_get(iommu->dev, "iommu_clk"); - if (IS_ERR(iommu->clk)) { - dev_err(iommu->dev, "could not get iommu_clk\n"); - clk_unprepare(iommu->pclk); - return PTR_ERR(iommu->clk); - } - - ret = clk_prepare(iommu->clk); - if (ret) { - dev_err(iommu->dev, "could not prepare iommu_clk\n"); - clk_unprepare(iommu->pclk); - return ret; - } - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - iommu->base = devm_ioremap_resource(iommu->dev, r); - if (IS_ERR(iommu->base)) { - dev_err(iommu->dev, "could not get iommu base\n"); - ret = PTR_ERR(iommu->base); - goto fail; - } - - iommu->irq = platform_get_irq(pdev, 0); - if (iommu->irq < 0) { - dev_err(iommu->dev, "could not get iommu irq\n"); - ret = -ENODEV; - goto fail; - } - - ret = of_property_read_u32(iommu->dev->of_node, "ncb", &val); - if (ret) { - dev_err(iommu->dev, "could not get ncb\n"); - goto fail; - } - iommu->ncb = val; - - msm_iommu_reset(iommu->base, iommu->ncb); - SET_M(iommu->base, 0, 1); - SET_PAR(iommu->base, 0, 0); - SET_V2PCFG(iommu->base, 0, 1); - SET_V2PPR(iommu->base, 0, 0); - par = GET_PAR(iommu->base, 0); - SET_V2PCFG(iommu->base, 0, 0); - SET_M(iommu->base, 0, 0); - - if (!par) { - pr_err("Invalid PAR value detected\n"); - ret = -ENODEV; - goto fail; - } - - ret = devm_request_threaded_irq(iommu->dev, iommu->irq, NULL, - msm_iommu_fault_handler, - IRQF_ONESHOT | IRQF_SHARED, - "msm_iommu_secure_irpt_handler", - iommu); - if (ret) { - pr_err("Request IRQ %d failed with ret=%d\n", iommu->irq, ret); - goto fail; - } - - list_add(&iommu->dev_node, &qcom_iommu_devices); - - pr_info("device mapped at %p, irq %d with %d ctx banks\n", - iommu->base, iommu->irq, iommu->ncb); -fail: - clk_unprepare(iommu->clk); - clk_unprepare(iommu->pclk); - return ret; -} - -static const struct of_device_id msm_iommu_dt_match[] = { - { .compatible = "qcom,apq8064-iommu" }, - {} -}; - -static int msm_iommu_remove(struct platform_device *pdev) -{ - struct msm_iommu_dev *iommu = platform_get_drvdata(pdev); - - clk_unprepare(iommu->clk); - clk_unprepare(iommu->pclk); - return 0; -} - -static struct platform_driver msm_iommu_driver = { - .driver = { - .name = "msm_iommu", - .of_match_table = msm_iommu_dt_match, - }, - .probe = msm_iommu_probe, - .remove = msm_iommu_remove, -}; - -static struct platform_driver * const drivers[] = { - &msm_iommu_driver, - &msm_iommu_ctx_driver, -}; - -static int __init msm_iommu_driver_init(void) -{ - return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); -} - -static void __exit msm_iommu_driver_exit(void) -{ - platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); -} - -subsys_initcall(msm_iommu_driver_init); -module_exit(msm_iommu_driver_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>"); |