@@ -110,4 +110,16 @@ config CORESIGHT_CPU_DEBUG
properly, please refer Documentation/trace/coresight-cpu-debug.rst
for detailed description and the example for usage.
+config CORESIGHT_CTI
+ bool "CoreSight Cross Trigger Interface (CTI) driver"
+ depends on ARM || ARM64
+ help
+ This driver provides support for CoreSight CTI and CTM components.
+ These provide hardware triggering events between CoreSight trace
+ source and sink components. These can be used to halt trace or
+ inject events into the trace stream. CTI also provides a software
+ control to trigger the same halt events. This can provide fast trace
+ halt compared to disabling sources and sinks normally in driver
+ software.
+
endif
@@ -17,3 +17,6 @@ obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
+obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o \
+ coresight-cti-platform.o \
+ coresight-cti-sysfs.o
new file mode 100644
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019, The Linaro Limited. All rights reserved.
+ */
+
+#include <linux/of.h>
+
+#include "coresight-cti.h"
+
+/* get the hardware configuration & connection data. */
+int cti_plat_get_hw_data(struct device *dev,
+ struct cti_drvdata *drvdata)
+{
+ int rc = 0;
+ struct cti_device *cti_dev = &drvdata->ctidev;
+
+ /* if no connections, just add a single default based on max IN-OUT */
+ if (cti_dev->nr_trig_con == 0)
+ rc = cti_add_default_connection(dev, drvdata);
+ return rc;
+}
+
+struct coresight_platform_data *
+coresight_cti_get_platform_data(struct device *dev)
+{
+ int ret = -ENOENT;
+ struct coresight_platform_data *pdata = NULL;
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev);
+
+ if (IS_ERR_OR_NULL(fwnode))
+ goto error;
+
+ /*
+ * Alloc platform data but leave it zero init. CTI does not use the
+ * same connection infrastructuree as trace path components but an
+ * empty struct enables us to use the standard coresight component
+ * registration code.
+ */
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ /* get some CTI specifics */
+ ret = cti_plat_get_hw_data(dev, drvdata);
+
+ if (!ret)
+ return pdata;
+error:
+ return ERR_PTR(ret);
+}
new file mode 100644
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Linaro Limited, All rights reserved.
+ * Author: Mike Leach <mike.leach@linaro.org>
+ */
+
+#include <linux/coresight.h>
+
+#include "coresight-cti.h"
+
+/* basic attributes */
+static ssize_t enable_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int enable_req;
+ bool enabled, powered;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ ssize_t size = 0;
+
+ enable_req = atomic_read(&drvdata->config.enable_req_count);
+ spin_lock(&drvdata->spinlock);
+ powered = drvdata->config.hw_powered;
+ enabled = drvdata->config.hw_enabled;
+ spin_unlock(&drvdata->spinlock);
+
+ if (powered) {
+ size = scnprintf(buf, PAGE_SIZE, "cti %s; powered;\n",
+ enabled ? "enabled" : "disabled");
+ } else {
+ size = scnprintf(buf, PAGE_SIZE, "cti %s; unpowered;\n",
+ enable_req ? "enable req" : "disabled");
+ }
+ return size;
+}
+
+static ssize_t enable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int ret = 0;
+ unsigned long val;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ if (val)
+ ret = cti_enable(drvdata->csdev);
+ else
+ ret = cti_disable(drvdata->csdev);
+ if (ret)
+ return ret;
+ return size;
+}
+static DEVICE_ATTR_RW(enable);
+
+/* attribute and group sysfs tables. */
+static struct attribute *coresight_cti_attrs[] = {
+ &dev_attr_enable.attr,
+ NULL,
+};
+
+static const struct attribute_group coresight_cti_group = {
+ .attrs = coresight_cti_attrs,
+};
+
+const struct attribute_group *coresight_cti_groups[] = {
+ &coresight_cti_group,
+ NULL,
+};
new file mode 100644
@@ -0,0 +1,445 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Linaro Limited, All rights reserved.
+ * Author: Mike Leach <mike.leach@linaro.org>
+ */
+
+#include "coresight-cti.h"
+
+/**
+ * CTI devices can be associated with a PE, or be connected to CoreSight
+ * hardware. We have a list of all CTIs irrespective of CPU bound or
+ * otherwise.
+ *
+ * We assume that the non-CPU CTIs are always powered as we do with sinks etc.
+ *
+ * We leave the client to figure out if all the CTIs are interconnected with
+ * the same CTM, in general this is the case but does not always have to be.
+ */
+
+/* net of CTI devices connected via CTM */
+LIST_HEAD(ect_net);
+
+/* protect the list */
+static DEFINE_MUTEX(ect_mutex);
+
+#define csdev_to_cti_drvdata(csdev) \
+ dev_get_drvdata(csdev->dev.parent)
+
+/*
+ * CTI naming. CTI bound to cores will have the name cti_cpu<N> where
+ * N is the CPU ID. System CTIs will have the name cti_sys<I> where I
+ * is an index allocated by order of discovery.
+ *
+ * CTI device name list - for CTI not bound to cores.
+ */
+DEFINE_CORESIGHT_DEVLIST(cti_sys_devs, "cti_sys");
+
+/* write set of regs to hardware - call with spinlock claimed */
+void cti_write_all_hw_regs(struct cti_drvdata *drvdata)
+{
+ struct cti_config *config = &drvdata->config;
+ int i;
+
+ CS_UNLOCK(drvdata->base);
+
+ /* disable CTI before writing registers */
+ writel_relaxed(0, drvdata->base + CTICONTROL);
+
+ /* write the CTI trigger registers */
+ for (i = 0; i < config->nr_trig_max; i++) {
+ writel_relaxed(config->ctiinen[i], drvdata->base + CTIINEN(i));
+ writel_relaxed(config->ctiouten[i],
+ drvdata->base + CTIOUTEN(i));
+ }
+
+ /* other regs */
+ writel_relaxed(config->ctigate, drvdata->base + CTIGATE);
+ writel_relaxed(config->asicctl, drvdata->base + ASICCTL);
+ writel_relaxed(config->ctiappset, drvdata->base + CTIAPPSET);
+
+ /* re-enable CTI */
+ writel_relaxed(1, drvdata->base + CTICONTROL);
+
+ CS_LOCK(drvdata->base);
+}
+
+static void cti_enable_hw_smp_call(void *info)
+{
+ struct cti_drvdata *drvdata = info;
+
+ cti_write_all_hw_regs(drvdata);
+}
+
+/* write regs to hardware and enable */
+static int cti_enable_hw(struct cti_drvdata *drvdata)
+{
+ struct cti_config *config = &drvdata->config;
+ struct device *dev = &drvdata->csdev->dev;
+ int rc = 0;
+
+ pm_runtime_get_sync(dev->parent);
+ spin_lock(&drvdata->spinlock);
+
+ /* no need to do anything if enabled or unpowered*/
+ if (config->hw_enabled || !config->hw_powered)
+ goto cti_state_unchanged;
+
+ /* claim the device */
+ rc = coresight_claim_device(drvdata->base);
+ if (rc)
+ goto cti_err_not_enabled;
+
+ if (drvdata->ctidev.cpu >= 0) {
+ rc = smp_call_function_single(drvdata->ctidev.cpu,
+ cti_enable_hw_smp_call,
+ drvdata, 1);
+ if (rc)
+ goto cti_err_not_enabled;
+ } else {
+ cti_write_all_hw_regs(drvdata);
+ }
+
+ config->hw_enabled = true;
+ atomic_inc(&drvdata->config.enable_req_count);
+ spin_unlock(&drvdata->spinlock);
+ return rc;
+
+cti_state_unchanged:
+ atomic_inc(&drvdata->config.enable_req_count);
+
+ /* cannot enable due to error */
+cti_err_not_enabled:
+ spin_unlock(&drvdata->spinlock);
+ pm_runtime_put(dev->parent);
+ return rc;
+}
+
+/* disable hardware */
+static int cti_disable_hw(struct cti_drvdata *drvdata)
+{
+ struct cti_config *config = &drvdata->config;
+ struct device *dev = &drvdata->csdev->dev;
+
+ spin_lock(&drvdata->spinlock);
+
+ /* check refcount - disable on 0 */
+ if (atomic_dec_return(&drvdata->config.enable_req_count) > 0)
+ goto cti_not_disabled;
+
+ /* no need to do anything if disabled or cpu unpowered */
+ if (!config->hw_enabled || !config->hw_powered)
+ goto cti_not_disabled;
+
+ CS_UNLOCK(drvdata->base);
+
+ /* disable CTI */
+ writel_relaxed(0, drvdata->base + CTICONTROL);
+ config->hw_enabled = false;
+
+ coresight_disclaim_device_unlocked(drvdata->base);
+ CS_LOCK(drvdata->base);
+ spin_unlock(&drvdata->spinlock);
+ pm_runtime_put(dev);
+ return 0;
+
+ /* not disabled this call */
+cti_not_disabled:
+ spin_unlock(&drvdata->spinlock);
+ return 0;
+}
+
+/*
+ * Look at the HW DEVID register for some of the HW settings.
+ * DEVID[15:8] - max number of in / out triggers.
+ */
+#define CTI_DEVID_MAXTRIGS(devid_val) ((int) BMVAL(devid_val, 8, 15))
+
+/* DEVID[19:16] - number of CTM channels */
+#define CTI_DEVID_CTMCHANNELS(devid_val) ((int) BMVAL(devid_val, 16, 19))
+
+static void cti_set_default_config(struct device *dev,
+ struct cti_drvdata *drvdata)
+{
+ struct cti_config *config = &drvdata->config;
+ u32 devid;
+
+ devid = readl_relaxed(drvdata->base + CORESIGHT_DEVID);
+ config->nr_trig_max = CTI_DEVID_MAXTRIGS(devid);
+
+ /*
+ * no current hardware should exceed this, but protect the driver
+ * in case of fault / out of spec hw
+ */
+ if (config->nr_trig_max > CTIINOUTEN_MAX) {
+ dev_warn_once(dev,
+ "Limiting HW MaxTrig value(%d) to driver max(%d)\n",
+ config->nr_trig_max, CTIINOUTEN_MAX);
+ config->nr_trig_max = CTIINOUTEN_MAX;
+ }
+
+ config->nr_ctm_channels = CTI_DEVID_CTMCHANNELS(devid);
+
+ /* Most regs default to 0 as zalloc'ed except...*/
+ config->trig_filter_enable = true;
+ config->ctigate = GENMASK(config->nr_ctm_channels - 1, 0);
+ atomic_set(&config->enable_req_count, 0);
+}
+
+/*
+ * Add a connection entry to the list of connections for this
+ * CTI device.
+ */
+int cti_add_connection_entry(struct device *dev, struct cti_drvdata *drvdata,
+ struct cti_trig_con *tc,
+ struct coresight_device *csdev,
+ const char *assoc_dev_name)
+{
+ struct cti_device *cti_dev = &drvdata->ctidev;
+
+ tc->con_dev = csdev;
+ /*
+ * Prefer actual associated CS device dev name to supplied value -
+ * which is likely to be node name / other conn name.
+ */
+ if (csdev)
+ tc->con_dev_name = devm_kstrdup(dev,
+ dev_name(&csdev->dev),
+ GFP_KERNEL);
+ else if (assoc_dev_name != NULL)
+ tc->con_dev_name = devm_kstrdup(dev,
+ assoc_dev_name, GFP_KERNEL);
+ list_add_tail(&tc->node, &cti_dev->trig_cons);
+ cti_dev->nr_trig_con++;
+
+ /* add connection usage bit info to overall info */
+ drvdata->config.trig_in_use |= tc->con_in->used_mask;
+ drvdata->config.trig_out_use |= tc->con_out->used_mask;
+
+ return 0;
+}
+
+/* create a trigger connection with appropriately sized signal groups */
+struct cti_trig_con *cti_allocate_trig_con(struct device *dev, int in_sigs,
+ int out_sigs)
+{
+ struct cti_trig_con *tc = NULL;
+ struct cti_trig_grp *in = NULL, *out = NULL;
+
+ tc = devm_kzalloc(dev, sizeof(struct cti_trig_con), GFP_KERNEL);
+ if (!tc)
+ return tc;
+
+ in = devm_kzalloc(dev,
+ offsetof(struct cti_trig_grp, sig_types[in_sigs]),
+ GFP_KERNEL);
+ if (!in)
+ return NULL;
+
+ out = devm_kzalloc(dev,
+ offsetof(struct cti_trig_grp, sig_types[out_sigs]),
+ GFP_KERNEL);
+ if (!out)
+ return NULL;
+
+ tc->con_in = in;
+ tc->con_out = out;
+ tc->con_in->nr_sigs = in_sigs;
+ tc->con_out->nr_sigs = out_sigs;
+ return tc;
+}
+
+/*
+ * Add a default connection if nothing else is specified.
+ * single connection based on max in/out info, no assoc device
+ */
+int cti_add_default_connection(struct device *dev, struct cti_drvdata *drvdata)
+{
+ int ret = 0;
+ int n_trigs = drvdata->config.nr_trig_max;
+ u32 n_trig_mask = GENMASK(n_trigs - 1, 0);
+ struct cti_trig_con *tc = NULL;
+
+ /*
+ * Assume max trigs for in and out,
+ * all used, default sig types allocated
+ */
+ tc = cti_allocate_trig_con(dev, n_trigs, n_trigs);
+ if (!tc)
+ return -ENOMEM;
+
+ tc->con_in->used_mask = n_trig_mask;
+ tc->con_out->used_mask = n_trig_mask;
+ ret = cti_add_connection_entry(dev, drvdata, tc, NULL, "default");
+ return ret;
+}
+
+/** cti ect operations **/
+int cti_enable(struct coresight_device *csdev)
+{
+ struct cti_drvdata *drvdata = csdev_to_cti_drvdata(csdev);
+
+ return cti_enable_hw(drvdata);
+}
+
+int cti_disable(struct coresight_device *csdev)
+{
+ struct cti_drvdata *drvdata = csdev_to_cti_drvdata(csdev);
+
+ return cti_disable_hw(drvdata);
+}
+
+const struct coresight_ops_ect cti_ops_ect = {
+ .enable = cti_enable,
+ .disable = cti_disable,
+};
+
+const struct coresight_ops cti_ops = {
+ .ect_ops = &cti_ops_ect,
+};
+
+/*
+ * Free up CTI specific resources
+ * called by dev->release, need to call down to underlying csdev release.
+ */
+static void cti_device_release(struct device *dev)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_drvdata *ect_item, *ect_tmp;
+
+ mutex_lock(&ect_mutex);
+
+ /* remove from the list */
+ list_for_each_entry_safe(ect_item, ect_tmp, &ect_net, node) {
+ if (ect_item == drvdata) {
+ list_del(&ect_item->node);
+ break;
+ }
+ }
+ mutex_unlock(&ect_mutex);
+
+ if (drvdata->csdev_release)
+ drvdata->csdev_release(dev);
+}
+
+static int cti_probe(struct amba_device *adev, const struct amba_id *id)
+{
+ int ret = 0;
+ void __iomem *base;
+ struct device *dev = &adev->dev;
+ struct cti_drvdata *drvdata = NULL;
+ struct coresight_desc cti_desc;
+ struct coresight_platform_data *pdata = NULL;
+ struct resource *res = &adev->res;
+
+ /* driver data*/
+ drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
+ if (!drvdata) {
+ ret = -ENOMEM;
+ dev_info(dev, "%s, mem err\n", __func__);
+ goto err_out;
+ }
+
+ /* Validity for the resource is already checked by the AMBA core */
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base)) {
+ ret = PTR_ERR(base);
+ dev_err(dev, "%s, remap err\n", __func__);
+ goto err_out;
+ }
+ drvdata->base = base;
+
+ dev_set_drvdata(dev, drvdata);
+
+ /* default CTI device info */
+ drvdata->ctidev.cpu = -1;
+ drvdata->ctidev.nr_trig_con = 0;
+ drvdata->ctidev.ctm_id = 0;
+ INIT_LIST_HEAD(&drvdata->ctidev.trig_cons);
+
+ spin_lock_init(&drvdata->spinlock);
+
+ /* initialise CTI driver config values */
+ cti_set_default_config(dev, drvdata);
+
+ pdata = coresight_cti_get_platform_data(dev);
+ if (IS_ERR(pdata)) {
+ dev_err(dev, "coresight_cti_get_platform_data err\n");
+ ret = PTR_ERR(pdata);
+ goto err_out;
+ }
+
+ /* default to powered - could change on PM notifications */
+ drvdata->config.hw_powered = true;
+
+ /* set up device name - will depend if cpu bound or otherwise */
+ if (drvdata->ctidev.cpu >= 0)
+ cti_desc.name = devm_kasprintf(dev, GFP_KERNEL, "cti_cpu%d",
+ drvdata->ctidev.cpu);
+ else
+ cti_desc.name = coresight_alloc_device_name(&cti_sys_devs, dev);
+ if (!cti_desc.name) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ /* set up coresight component description */
+ cti_desc.pdata = pdata;
+ cti_desc.type = CORESIGHT_DEV_TYPE_ECT;
+ cti_desc.subtype.ect_subtype = CORESIGHT_DEV_SUBTYPE_ECT_CTI;
+ cti_desc.ops = &cti_ops;
+ cti_desc.groups = coresight_cti_groups;
+ cti_desc.dev = dev;
+ drvdata->csdev = coresight_register(&cti_desc);
+ if (IS_ERR(drvdata->csdev)) {
+ ret = PTR_ERR(drvdata->csdev);
+ goto err_out;
+ }
+
+ /* add to list of CTI devices */
+ mutex_lock(&ect_mutex);
+ list_add(&drvdata->node, &ect_net);
+ mutex_unlock(&ect_mutex);
+
+ /* set up release chain */
+ drvdata->csdev_release = drvdata->csdev->dev.release;
+ drvdata->csdev->dev.release = cti_device_release;
+
+ /* all done - dec pm refcount */
+ pm_runtime_put(&adev->dev);
+ dev_info(&drvdata->csdev->dev, "CTI initialized\n");
+ return 0;
+
+err_out:
+ return ret;
+}
+
+static struct amba_cs_uci_id uci_id_cti[] = {
+ {
+ /* CTI UCI data */
+ .devarch = 0x47701a14, /* CTI v2 */
+ .devarch_mask = 0xfff0ffff,
+ .devtype = 0x00000014, /* maj(0x4-debug) min(0x1-ECT) */
+ }
+};
+
+static const struct amba_id cti_ids[] = {
+ CS_AMBA_ID(0x000bb906), /* Coresight CTI (SoC 400), C-A72, C-A57 */
+ CS_AMBA_ID(0x000bb922), /* CTI - C-A8 */
+ CS_AMBA_ID(0x000bb9a8), /* CTI - C-A53 */
+ CS_AMBA_ID(0x000bb9aa), /* CTI - C-A73 */
+ CS_AMBA_UCI_ID(0x000bb9da, uci_id_cti), /* CTI - C-A35 */
+ CS_AMBA_UCI_ID(0x000bb9ed, uci_id_cti), /* Coresight CTI (SoC 600) */
+ { 0, 0},
+};
+
+static struct amba_driver cti_driver = {
+ .drv = {
+ .name = "coresight-cti",
+ .owner = THIS_MODULE,
+ .suppress_bind_attrs = true,
+ },
+ .probe = cti_probe,
+ .id_table = cti_ids,
+};
+builtin_amba_driver(cti_driver);
new file mode 100644
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 Linaro Limited, All rights reserved.
+ * Author: Mike Leach <mike.leach@linaro.org>
+ */
+
+#ifndef _CORESIGHT_CORESIGHT_CTI_H
+#define _CORESIGHT_CORESIGHT_CTI_H
+
+#include <asm/local.h>
+#include <linux/spinlock.h>
+#include "coresight-priv.h"
+
+/*
+ * Device registers
+ * 0x000 - 0x144: CTI programming and status
+ * 0xEDC - 0xEF8: CTI integration test.
+ * 0xF00 - 0xFFC: Coresight management registers.
+ */
+/* CTI programming registers */
+#define CTICONTROL 0x000
+#define CTIINTACK 0x010
+#define CTIAPPSET 0x014
+#define CTIAPPCLEAR 0x018
+#define CTIAPPPULSE 0x01C
+#define CTIINEN(n) (0x020 + (4 * n))
+#define CTIOUTEN(n) (0x0A0 + (4 * n))
+#define CTITRIGINSTATUS 0x130
+#define CTITRIGOUTSTATUS 0x134
+#define CTICHINSTATUS 0x138
+#define CTICHOUTSTATUS 0x13C
+#define CTIGATE 0x140
+#define ASICCTL 0x144
+/* Integration test registers */
+#define ITCHINACK 0xEDC /* WO CTI CSSoc 400 only*/
+#define ITTRIGINACK 0xEE0 /* WO CTI CSSoc 400 only*/
+#define ITCHOUT 0xEE4 /* WO RW-600 */
+#define ITTRIGOUT 0xEE8 /* WO RW-600 */
+#define ITCHOUTACK 0xEEC /* RO CTI CSSoc 400 only*/
+#define ITTRIGOUTACK 0xEF0 /* RO CTI CSSoc 400 only*/
+#define ITCHIN 0xEF4 /* RO */
+#define ITTRIGIN 0xEF8 /* RO */
+/* management registers */
+#define CTIDEVAFF0 0xFA8
+#define CTIDEVAFF1 0xFAC
+
+/*
+ * CTI CSSoc 600 has a max of 32 trigger signals per direction.
+ * CTI CSSoc 400 has 8 IO triggers - other CTIs can be impl def.
+ * Max of in and out defined in the DEVID register.
+ * - pick up actual number used from .dts parameters if present.
+ */
+#define CTIINOUTEN_MAX 32
+
+/**
+ * Group of related trigger signals
+ *
+ * @nr_sigs: number of signals in the group.
+ * @used_mask: bitmask representing the signal indexes in the group.
+ * @sig_types: array of types for the signals, length nr_sigs.
+ */
+struct cti_trig_grp {
+ int nr_sigs;
+ u32 used_mask;
+ int sig_types[0];
+};
+
+/**
+ * Trigger connection - connection between a CTI and other (coresight) device
+ * lists input and output trigger signals for the device
+ *
+ * @con_in: connected CTIIN signals for the device.
+ * @con_out: connected CTIOUT signals for the device.
+ * @con_dev: coresight device connected to the CTI, NULL if not CS device
+ * @con_dev_name: name of connected device (CS or CPU)
+ * @node: entry node in list of connections.
+ */
+struct cti_trig_con {
+ struct cti_trig_grp *con_in;
+ struct cti_trig_grp *con_out;
+ struct coresight_device *con_dev;
+ char *con_dev_name;
+ struct list_head node;
+};
+
+/**
+ * struct cti_device - description of CTI device properties.
+ *
+ * @nt_trig_con: Number of external devices connected to this device.
+ * @ctm_id: which CTM this device is connected to (by default it is
+ * assumed there is a single CTM per SoC, ID 0).
+ * @trig_cons: list of connections to this device.
+ * @cpu: CPU ID if associated with CPU, -1 otherwise.
+ */
+struct cti_device {
+ int nr_trig_con;
+ u32 ctm_id;
+ struct list_head trig_cons;
+ int cpu;
+};
+
+/**
+ * struct cti_config - configuration of the CTI device hardware
+ *
+ * @nr_trig_max: Max number of trigger signals implemented on device.
+ * (max of trig_in or trig_out) - from ID register.
+ * @nr_ctm_channels: number of available CTM channels - from ID register.
+ * @enable_req_count: CTI is enabled alongside >=1 associated devices.
+ * @hw_enabled: true if hw is currently enabled.
+ * @hw_powered: true if associated cpu powered on, or no cpu.
+ * @trig_in_use: bitfield of in triggers registered as in use.
+ * @trig_out_use: bitfield of out triggers registered as in use.
+ * @trig_out_filter: bitfield of out triggers that are blocked if filter
+ * enabled. Typically this would be dbgreq / restart on
+ * a core CTI.
+ * @trig_filter_enable: 1 if filtering enabled.
+ * @xtrig_rchan_sel: channel selection for xtrigger connection show.
+ * @ctiappset: CTI Software application channel set.
+ * @ctiinout_sel: register selector for INEN and OUTEN regs.
+ * @ctiinen: enable input trigger to a channel.
+ * @ctiouten: enable output trigger from a channel.
+ * @ctigate: gate channel output from CTI to CTM.
+ * @asicctl: asic control register.
+ */
+struct cti_config {
+ /* hardware description */
+ int nr_ctm_channels;
+ int nr_trig_max;
+
+ /* cti enable control */
+ atomic_t enable_req_count;
+ bool hw_enabled;
+ bool hw_powered;
+
+ /* registered triggers and filtering */
+ u32 trig_in_use;
+ u32 trig_out_use;
+ u32 trig_out_filter;
+ bool trig_filter_enable;
+ u8 xtrig_rchan_sel;
+
+ /* cti cross trig programmable regs */
+ u32 ctiappset;
+ u8 ctiinout_sel;
+ u32 ctiinen[CTIINOUTEN_MAX];
+ u32 ctiouten[CTIINOUTEN_MAX];
+ u32 ctigate;
+ u32 asicctl;
+};
+
+/**
+ * struct cti_drvdata - specifics for the CTI device
+ * @base: Memory mapped base address for this component..
+ * @csdev: Standard CoreSight device information.
+ * @ctidev: Extra information needed by the CTI/CTM framework.
+ * @spinlock: Control data access to one at a time.
+ * @config: Configuration data for this CTI device.
+ * @node: List entry of this device in the list of CTI devices.
+ * @csdev_release: release function for underlying coresight_device.
+ */
+struct cti_drvdata {
+ void __iomem *base;
+ struct coresight_device *csdev;
+ struct cti_device ctidev;
+ spinlock_t spinlock;
+ struct cti_config config;
+ struct list_head node;
+ void (*csdev_release)(struct device *dev);
+};
+
+/* private cti driver fns & vars */
+extern const struct attribute_group *coresight_cti_groups[];
+int cti_add_default_connection(struct device *dev,
+ struct cti_drvdata *drvdata);
+int cti_add_connection_entry(struct device *dev, struct cti_drvdata *drvdata,
+ struct cti_trig_con *tc,
+ struct coresight_device *csdev,
+ const char *assoc_dev_name);
+struct cti_trig_con *cti_allocate_trig_con(struct device *dev, int in_sigs,
+ int out_sigs);
+int cti_enable(struct coresight_device *csdev);
+int cti_disable(struct coresight_device *csdev);
+struct coresight_platform_data *
+coresight_cti_get_platform_data(struct device *dev);
+
+#endif /* _CORESIGHT_CORESIGHT_CTI_H */
@@ -955,6 +955,9 @@ static struct device_type coresight_dev_type[] = {
{
.name = "helper",
},
+ {
+ .name = "ect",
+ },
};
static void coresight_device_release(struct device *dev)
@@ -41,6 +41,7 @@ enum coresight_dev_type {
CORESIGHT_DEV_TYPE_LINKSINK,
CORESIGHT_DEV_TYPE_SOURCE,
CORESIGHT_DEV_TYPE_HELPER,
+ CORESIGHT_DEV_TYPE_ECT,
};
enum coresight_dev_subtype_sink {
@@ -68,6 +69,12 @@ enum coresight_dev_subtype_helper {
CORESIGHT_DEV_SUBTYPE_HELPER_CATU,
};
+/* Embedded Cross Trigger (ECT) sub-types */
+enum coresight_dev_subtype_ect {
+ CORESIGHT_DEV_SUBTYPE_ECT_NONE,
+ CORESIGHT_DEV_SUBTYPE_ECT_CTI,
+};
+
/**
* union coresight_dev_subtype - further characterisation of a type
* @sink_subtype: type of sink this component is, as defined
@@ -78,6 +85,8 @@ enum coresight_dev_subtype_helper {
* by @coresight_dev_subtype_source.
* @helper_subtype: type of helper this component is, as defined
* by @coresight_dev_subtype_helper.
+ * @ect_subtype: type of cross trigger this component is, as
+ * defined by @coresight_dev_subtype_ect
*/
union coresight_dev_subtype {
/* We have some devices which acts as LINK and SINK */
@@ -87,6 +96,7 @@ union coresight_dev_subtype {
};
enum coresight_dev_subtype_source source_subtype;
enum coresight_dev_subtype_helper helper_subtype;
+ enum coresight_dev_subtype_ect ect_subtype;
};
/**
@@ -196,6 +206,7 @@ static struct coresight_dev_list (var) = { \
#define sink_ops(csdev) csdev->ops->sink_ops
#define link_ops(csdev) csdev->ops->link_ops
#define helper_ops(csdev) csdev->ops->helper_ops
+#define ect_ops(csdev) csdev->ops->ect_ops
/**
* struct coresight_ops_sink - basic operations for a sink
@@ -262,11 +273,23 @@ struct coresight_ops_helper {
int (*disable)(struct coresight_device *csdev, void *data);
};
+/**
+ * struct coresight_ops_ect - Ops for an embedded cross trigger device
+ *
+ * @enable : Enable the device
+ * @disable : Disable the device
+ */
+struct coresight_ops_ect {
+ int (*enable)(struct coresight_device *csdev);
+ int (*disable)(struct coresight_device *csdev);
+};
+
struct coresight_ops {
const struct coresight_ops_sink *sink_ops;
const struct coresight_ops_link *link_ops;
const struct coresight_ops_source *source_ops;
const struct coresight_ops_helper *helper_ops;
+ const struct coresight_ops_ect *ect_ops;
};
#ifdef CONFIG_CORESIGHT