diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-dynamic-replicator.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-dynamic-replicator.c | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c deleted file mode 100644 index b7d7c4146f9a..000000000000 --- a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c +++ /dev/null @@ -1,285 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. - */ - -#include <linux/amba/bus.h> -#include <linux/clk.h> -#include <linux/coresight.h> -#include <linux/device.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/of.h> -#include <linux/pm_runtime.h> -#include <linux/slab.h> - -#include "coresight-priv.h" - -#define REPLICATOR_IDFILTER0 0x000 -#define REPLICATOR_IDFILTER1 0x004 - -/** - * struct replicator_drvdata - specifics associated to a replicator component - * @base: memory mapped base address for this component. - * @dev: the device entity associated with this component - * @atclk: optional clock for the core parts of the replicator. - * @csdev: component vitals needed by the framework - */ -struct replicator_drvdata { - void __iomem *base; - struct device *dev; - struct clk *atclk; - struct coresight_device *csdev; -}; - -/* - * dynamic_replicator_reset : Reset the replicator configuration to sane values. - */ -static void dynamic_replicator_reset(struct replicator_drvdata *drvdata) -{ - CS_UNLOCK(drvdata->base); - - if (!coresight_claim_device_unlocked(drvdata->base)) { - writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0); - writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1); - coresight_disclaim_device_unlocked(drvdata->base); - } - - CS_LOCK(drvdata->base); -} - -static int dynamic_replicator_enable(struct replicator_drvdata *drvdata, - int inport, int outport) -{ - int rc = 0; - u32 reg; - - switch (outport) { - case 0: - reg = REPLICATOR_IDFILTER0; - break; - case 1: - reg = REPLICATOR_IDFILTER1; - break; - default: - WARN_ON(1); - return -EINVAL; - } - - CS_UNLOCK(drvdata->base); - - if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) && - (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff)) - rc = coresight_claim_device_unlocked(drvdata->base); - - /* Ensure that the outport is enabled. */ - if (!rc) - writel_relaxed(0x00, drvdata->base + reg); - CS_LOCK(drvdata->base); - - return rc; -} - -static int replicator_enable(struct coresight_device *csdev, int inport, - int outport) -{ - int rc = 0; - struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - - rc = dynamic_replicator_enable(drvdata, inport, outport); - dev_dbg(drvdata->dev, "REPLICATOR enabled\n"); - return rc; -} - -static void dynamic_replicator_disable(struct replicator_drvdata *drvdata, - int inport, int outport) -{ - u32 reg; - - switch (outport) { - case 0: - reg = REPLICATOR_IDFILTER0; - break; - case 1: - reg = REPLICATOR_IDFILTER1; - break; - default: - WARN_ON(1); - return; - } - - CS_UNLOCK(drvdata->base); - - /* disable the flow of ATB data through port */ - writel_relaxed(0xff, drvdata->base + reg); - - if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) && - (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff)) - coresight_disclaim_device_unlocked(drvdata->base); - CS_LOCK(drvdata->base); -} - -static void replicator_disable(struct coresight_device *csdev, int inport, - int outport) -{ - struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - - dynamic_replicator_disable(drvdata, inport, outport); - dev_dbg(drvdata->dev, "REPLICATOR disabled\n"); -} - -static const struct coresight_ops_link replicator_link_ops = { - .enable = replicator_enable, - .disable = replicator_disable, -}; - -static const struct coresight_ops replicator_cs_ops = { - .link_ops = &replicator_link_ops, -}; - -#define coresight_replicator_reg(name, offset) \ - coresight_simple_reg32(struct replicator_drvdata, name, offset) - -coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0); -coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1); - -static struct attribute *replicator_mgmt_attrs[] = { - &dev_attr_idfilter0.attr, - &dev_attr_idfilter1.attr, - NULL, -}; - -static const struct attribute_group replicator_mgmt_group = { - .attrs = replicator_mgmt_attrs, - .name = "mgmt", -}; - -static const struct attribute_group *replicator_groups[] = { - &replicator_mgmt_group, - NULL, -}; - -static int replicator_probe(struct device *dev, struct resource *res) -{ - int ret = 0; - struct coresight_platform_data *pdata = NULL; - struct replicator_drvdata *drvdata; - struct coresight_desc desc = { 0 }; - struct device_node *np = dev->of_node; - void __iomem *base; - - if (np) { - pdata = of_get_coresight_platform_data(dev, np); - if (IS_ERR(pdata)) - return PTR_ERR(pdata); - dev->platform_data = pdata; - } - - drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); - if (!drvdata) - return -ENOMEM; - - drvdata->dev = dev; - drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */ - if (!IS_ERR(drvdata->atclk)) { - ret = clk_prepare_enable(drvdata->atclk); - if (ret) - return ret; - } - - /* - * Map the device base for dynamic-replicator, which has been - * validated by AMBA core - */ - if (res) { - base = devm_ioremap_resource(dev, res); - if (IS_ERR(base)) { - ret = PTR_ERR(base); - goto out_disable_clk; - } - drvdata->base = base; - desc.groups = replicator_groups; - } - - dev_set_drvdata(dev, drvdata); - - desc.type = CORESIGHT_DEV_TYPE_LINK; - desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT; - desc.ops = &replicator_cs_ops; - desc.pdata = dev->platform_data; - desc.dev = dev; - drvdata->csdev = coresight_register(&desc); - - if (IS_ERR(drvdata->csdev)) { - ret = PTR_ERR(drvdata->csdev); - goto out_disable_clk; - } - - dynamic_replicator_reset(drvdata); - pm_runtime_put(dev); - -out_disable_clk: - if (ret && !IS_ERR_OR_NULL(drvdata->atclk)) - clk_disable_unprepare(drvdata->atclk); - return ret; -} - -static int dynamic_replicator_probe(struct amba_device *adev, - const struct amba_id *id) -{ - return replicator_probe(&adev->dev, &adev->res); -} - -#ifdef CONFIG_PM -static int replicator_runtime_suspend(struct device *dev) -{ - struct replicator_drvdata *drvdata = dev_get_drvdata(dev); - - if (drvdata && !IS_ERR(drvdata->atclk)) - clk_disable_unprepare(drvdata->atclk); - - return 0; -} - -static int replicator_runtime_resume(struct device *dev) -{ - struct replicator_drvdata *drvdata = dev_get_drvdata(dev); - - if (drvdata && !IS_ERR(drvdata->atclk)) - clk_prepare_enable(drvdata->atclk); - - return 0; -} -#endif - -static const struct dev_pm_ops replicator_dev_pm_ops = { - SET_RUNTIME_PM_OPS(replicator_runtime_suspend, - replicator_runtime_resume, - NULL) -}; - -static const struct amba_id dynamic_replicator_ids[] = { - { - .id = 0x000bb909, - .mask = 0x000fffff, - }, - { - /* Coresight SoC-600 */ - .id = 0x000bb9ec, - .mask = 0x000fffff, - }, - { 0, 0 }, -}; - -static struct amba_driver dynamic_replicator_driver = { - .drv = { - .name = "coresight-dynamic-replicator", - .pm = &replicator_dev_pm_ops, - .suppress_bind_attrs = true, - }, - .probe = dynamic_replicator_probe, - .id_table = dynamic_replicator_ids, -}; -builtin_amba_driver(dynamic_replicator_driver); |