Add cdsp loader and enable compilation
Added cdsp loader file and enabled compilation. Shared object not yet shipped to superimg. Change-Id: Iadcc81a925b198115db627eccbd7181eec053f47 Signed-off-by: Anirudh Raghavendra <quic_araghave@quicinc.com>
This commit is contained in:
Anirudh Raghavendra
301
dsp/cdsp-loader.c
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301
dsp/cdsp-loader.c
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2012-2014, 2017-2021, The Linux Foundation. All rights reserved.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/of_device.h>
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#include <linux/sysfs.h>
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#include <linux/remoteproc.h>
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#define BOOT_CMD 1
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#define IMAGE_UNLOAD_CMD 0
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#define CDSP_SUBSYS_DOWN 0
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#define CDSP_SUBSYS_LOADED 1
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static ssize_t cdsp_boot_store(struct kobject *kobj,
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struct kobj_attribute *attr,
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const char *buf, size_t count);
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struct cdsp_loader_private {
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void *pil_h;
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struct kobject *boot_cdsp_obj;
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struct attribute_group *attr_group;
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};
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static struct kobj_attribute cdsp_boot_attribute =
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__ATTR(boot, 0220, NULL, cdsp_boot_store);
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static struct attribute *attrs[] = {
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&cdsp_boot_attribute.attr,
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NULL,
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};
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static u32 cdsp_state = CDSP_SUBSYS_DOWN;
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static struct platform_device *cdsp_private;
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static void cdsp_loader_unload(struct platform_device *pdev);
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static int cdsp_loader_do(struct platform_device *pdev)
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{
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struct cdsp_loader_private *priv = NULL;
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phandle rproc_phandle;
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int rc = 0, sz = 0;
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const char *img_name;
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if (!pdev) {
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pr_err("%s: Platform device null\n", __func__);
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goto fail;
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}
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if (!pdev->dev.of_node) {
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dev_err(&pdev->dev,
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"%s: Device tree information missing\n", __func__);
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goto fail;
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}
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rc = of_property_read_string(pdev->dev.of_node,
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"qcom,proc-img-to-load",
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&img_name);
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if (rc)
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goto fail;
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if (!strcmp(img_name, "cdsp")) {
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/* cdsp_state always returns "0".*/
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if (cdsp_state == CDSP_SUBSYS_DOWN) {
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priv = platform_get_drvdata(pdev);
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if (!priv) {
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dev_err(&pdev->dev,
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"%s: Private data get failed\n", __func__);
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goto fail;
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}
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sz = of_property_read_u32(pdev->dev.of_node, "qcom,rproc-handle",
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&rproc_phandle);
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if (sz) {
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pr_err("%s: of_property_read failed, returned value %d\n",
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__func__, sz);
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dev_err(&pdev->dev, "error reading rproc phandle\n");
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goto fail;
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}
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priv->pil_h = rproc_get_by_phandle(rproc_phandle);
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if (!priv->pil_h) {
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dev_err(&pdev->dev, "rproc not found\n");
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goto fail;
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}
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dev_dbg(&pdev->dev, "%s: calling rproc_boot on %s\n",
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__func__, img_name);
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rc = rproc_boot(priv->pil_h);
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if (rc) {
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dev_err(&pdev->dev, "%s: rproc_boot failed with error %d\n",
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__func__, rc);
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goto fail;
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}
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/* Set the state of the CDSP.*/
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cdsp_state = CDSP_SUBSYS_LOADED;
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} else if (cdsp_state == CDSP_SUBSYS_LOADED) {
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dev_dbg(&pdev->dev,
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"%s: CDSP state = 0x%x\n", __func__, cdsp_state);
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}
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dev_dbg(&pdev->dev, "%s: CDSP image is loaded\n", __func__);
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return rc;
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}
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fail:
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if (pdev)
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dev_err(&pdev->dev,
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"%s: CDSP image loading failed\n", __func__);
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return rc;
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}
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static ssize_t cdsp_boot_store(struct kobject *kobj,
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struct kobj_attribute *attr,
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const char *buf,
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size_t count)
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{
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int ret = 0;
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uint32_t boot = 0;
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ret = kstrtou32(buf, 0, &boot);
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if (ret) {
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pr_debug("%s: invalid arguments for cdsp_loader.\n", __func__);
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return ret;
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}
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if (boot == BOOT_CMD) {
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pr_debug("%s: going to call cdsp_loader_do\n", __func__);
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cdsp_loader_do(cdsp_private);
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} else if (boot == IMAGE_UNLOAD_CMD) {
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pr_debug("%s: going to call cdsp_unloader\n", __func__);
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cdsp_loader_unload(cdsp_private);
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}
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return count;
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}
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static void cdsp_loader_unload(struct platform_device *pdev)
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{
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struct cdsp_loader_private *priv = NULL;
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priv = platform_get_drvdata(pdev);
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if (!priv)
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return;
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if (priv->pil_h) {
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dev_dbg(&pdev->dev, "%s: calling subsystem_put\n", __func__);
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rproc_shutdown(priv->pil_h);
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priv->pil_h = NULL;
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}
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}
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static int cdsp_loader_init_sysfs(struct platform_device *pdev)
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{
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int ret = -EINVAL;
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struct cdsp_loader_private *priv = NULL;
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cdsp_private = NULL;
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv) {
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ret = -ENOMEM;
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return ret;
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}
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platform_set_drvdata(pdev, priv);
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priv->pil_h = NULL;
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priv->boot_cdsp_obj = NULL;
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priv->attr_group = devm_kzalloc(&pdev->dev,
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sizeof(*(priv->attr_group)),
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GFP_KERNEL);
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if (!priv->attr_group) {
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ret = -ENOMEM;
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goto error_return;
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}
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priv->attr_group->attrs = attrs;
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priv->boot_cdsp_obj = kobject_create_and_add("boot_cdsp", kernel_kobj);
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if (!priv->boot_cdsp_obj) {
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dev_err(&pdev->dev, "%s: sysfs create and add failed\n",
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__func__);
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ret = -ENOMEM;
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goto error_return;
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}
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ret = sysfs_create_group(priv->boot_cdsp_obj, priv->attr_group);
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if (ret) {
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dev_err(&pdev->dev, "%s: sysfs create group failed %d\n",
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__func__, ret);
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goto error_return;
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}
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cdsp_private = pdev;
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return 0;
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error_return:
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if (priv->boot_cdsp_obj) {
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kobject_del(priv->boot_cdsp_obj);
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priv->boot_cdsp_obj = NULL;
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}
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if (ret)
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dev_err(&pdev->dev, "%s failed with ret %d\n",
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__func__, ret);
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return ret;
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}
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static int cdsp_loader_remove(struct platform_device *pdev)
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{
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struct cdsp_loader_private *priv = NULL;
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priv = platform_get_drvdata(pdev);
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if (!priv)
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return 0;
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if (priv->pil_h) {
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rproc_shutdown(priv->pil_h);
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priv->pil_h = NULL;
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}
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if (priv->boot_cdsp_obj) {
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sysfs_remove_group(priv->boot_cdsp_obj, priv->attr_group);
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kobject_del(priv->boot_cdsp_obj);
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priv->boot_cdsp_obj = NULL;
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}
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return 0;
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}
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static int cdsp_loader_probe(struct platform_device *pdev)
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{
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phandle rproc_phandle;
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struct property *prop = NULL;
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int size = 0;
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struct rproc *cdsp = NULL;
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int ret = 0;
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prop = of_find_property(pdev->dev.of_node, "qcom,rproc-handle", &size);
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if (!prop) {
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dev_err(&pdev->dev, "%s: error reading rproc phandle\n", __func__);
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return -ENOPARAM;
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}
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rproc_phandle = be32_to_cpup(prop->value);
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cdsp = rproc_get_by_phandle(rproc_phandle);
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if (!cdsp) {
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dev_err(&pdev->dev, "%s: rproc not found\n", __func__);
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return -EPROBE_DEFER;
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}
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ret = cdsp_loader_init_sysfs(pdev);
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if (ret != 0) {
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dev_err(&pdev->dev, "%s: Error in initing sysfs\n", __func__);
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return ret;
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}
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return 0;
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}
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static const struct of_device_id cdsp_loader_dt_match[] = {
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{ .compatible = "qcom,cdsp-loader" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, cdsp_loader_dt_match);
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static struct platform_driver cdsp_loader_driver = {
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.driver = {
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.name = "cdsp-loader",
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.of_match_table = cdsp_loader_dt_match,
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},
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.probe = cdsp_loader_probe,
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.remove = cdsp_loader_remove,
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};
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static int __init cdsp_loader_init(void)
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{
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return platform_driver_register(&cdsp_loader_driver);
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}
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module_init(cdsp_loader_init);
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static void __exit cdsp_loader_exit(void)
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{
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platform_driver_unregister(&cdsp_loader_driver);
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}
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module_exit(cdsp_loader_exit);
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MODULE_DESCRIPTION("CDSP Loader module");
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MODULE_LICENSE("GPL v2");
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