--- /dev/null
+/*
+ * Copyright (c) 2015, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/host1x.h>
+#include <linux/iommu.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "drm.h"
+#include "falcon.h"
+#include "vic.h"
+
+struct vic_config {
+ const char *firmware;
+};
+
+struct vic {
+ struct falcon falcon;
+ bool booted;
+
+ void __iomem *regs;
+ struct tegra_drm_client client;
+ struct host1x_channel *channel;
+ struct iommu_domain *domain;
+ struct device *dev;
+ struct clk *clk;
+
+ /* Platform configuration */
+ const struct vic_config *config;
+};
+
+static inline struct vic *to_vic(struct tegra_drm_client *client)
+{
+ return container_of(client, struct vic, client);
+}
+
+static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
+{
+ writel(value, vic->regs + offset);
+}
+
+static int vic_runtime_resume(struct device *dev)
+{
+ struct vic *vic = dev_get_drvdata(dev);
+
+ return clk_prepare_enable(vic->clk);
+}
+
+static int vic_runtime_suspend(struct device *dev)
+{
+ struct vic *vic = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(vic->clk);
+
+ vic->booted = false;
+
+ return 0;
+}
+
+static int vic_boot(struct vic *vic)
+{
+ u32 fce_ucode_size, fce_bin_data_offset;
+ void *hdr;
+ int err = 0;
+
+ if (vic->booted)
+ return 0;
+
+ /* setup clockgating registers */
+ vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
+ CG_IDLE_CG_EN |
+ CG_WAKEUP_DLY_CNT(4),
+ NV_PVIC_MISC_PRI_VIC_CG);
+
+ err = falcon_boot(&vic->falcon);
+ if (err < 0)
+ return err;
+
+ hdr = vic->falcon.firmware.vaddr;
+ fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
+ hdr = vic->falcon.firmware.vaddr +
+ *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
+ fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
+
+ falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
+ falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
+ fce_ucode_size);
+ falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
+ (vic->falcon.firmware.paddr + fce_bin_data_offset)
+ >> 8);
+
+ err = falcon_wait_idle(&vic->falcon);
+ if (err < 0) {
+ dev_err(vic->dev,
+ "failed to set application ID and FCE base\n");
+ return err;
+ }
+
+ vic->booted = true;
+
+ return 0;
+}
+
+static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
+ dma_addr_t *iova)
+{
+ struct tegra_drm *tegra = falcon->data;
+
+ return tegra_drm_alloc(tegra, size, iova);
+}
+
+static void vic_falcon_free(struct falcon *falcon, size_t size,
+ dma_addr_t iova, void *va)
+{
+ struct tegra_drm *tegra = falcon->data;
+
+ return tegra_drm_free(tegra, size, va, iova);
+}
+
+static const struct falcon_ops vic_falcon_ops = {
+ .alloc = vic_falcon_alloc,
+ .free = vic_falcon_free
+};
+
+static int vic_init(struct host1x_client *client)
+{
+ struct tegra_drm_client *drm = host1x_to_drm_client(client);
+ struct drm_device *dev = dev_get_drvdata(client->parent);
+ struct tegra_drm *tegra = dev->dev_private;
+ struct vic *vic = to_vic(drm);
+ int err;
+
+ if (tegra->domain) {
+ err = iommu_attach_device(tegra->domain, vic->dev);
+ if (err < 0) {
+ dev_err(vic->dev, "failed to attach to domain: %d\n",
+ err);
+ return err;
+ }
+
+ vic->domain = tegra->domain;
+ }
+
+ if (!vic->falcon.data) {
+ vic->falcon.data = tegra;
+ err = falcon_load_firmware(&vic->falcon);
+ if (err < 0)
+ goto detach_device;
+ }
+
+ vic->channel = host1x_channel_request(client->dev);
+ if (!vic->channel) {
+ err = -ENOMEM;
+ goto detach_device;
+ }
+
+ client->syncpts[0] = host1x_syncpt_request(client->dev, 0);
+ if (!client->syncpts[0]) {
+ err = -ENOMEM;
+ goto free_channel;
+ }
+
+ err = tegra_drm_register_client(tegra, drm);
+ if (err < 0)
+ goto free_syncpt;
+
+ return 0;
+
+free_syncpt:
+ host1x_syncpt_free(client->syncpts[0]);
+free_channel:
+ host1x_channel_free(vic->channel);
+detach_device:
+ if (tegra->domain)
+ iommu_detach_device(tegra->domain, vic->dev);
+
+ return err;
+}
+
+static int vic_exit(struct host1x_client *client)
+{
+ struct tegra_drm_client *drm = host1x_to_drm_client(client);
+ struct drm_device *dev = dev_get_drvdata(client->parent);
+ struct tegra_drm *tegra = dev->dev_private;
+ struct vic *vic = to_vic(drm);
+ int err;
+
+ err = tegra_drm_unregister_client(tegra, drm);
+ if (err < 0)
+ return err;
+
+ host1x_syncpt_free(client->syncpts[0]);
+ host1x_channel_free(vic->channel);
+
+ if (vic->domain) {
+ iommu_detach_device(vic->domain, vic->dev);
+ vic->domain = NULL;
+ }
+
+ return 0;
+}
+
+static const struct host1x_client_ops vic_client_ops = {
+ .init = vic_init,
+ .exit = vic_exit,
+};
+
+static int vic_open_channel(struct tegra_drm_client *client,
+ struct tegra_drm_context *context)
+{
+ struct vic *vic = to_vic(client);
+ int err;
+
+ err = pm_runtime_get_sync(vic->dev);
+ if (err < 0)
+ return err;
+
+ err = vic_boot(vic);
+ if (err < 0) {
+ pm_runtime_put(vic->dev);
+ return err;
+ }
+
+ context->channel = host1x_channel_get(vic->channel);
+ if (!context->channel) {
+ pm_runtime_put(vic->dev);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void vic_close_channel(struct tegra_drm_context *context)
+{
+ struct vic *vic = to_vic(context->client);
+
+ host1x_channel_put(context->channel);
+
+ pm_runtime_put(vic->dev);
+}
+
+static const struct tegra_drm_client_ops vic_ops = {
+ .open_channel = vic_open_channel,
+ .close_channel = vic_close_channel,
+ .submit = tegra_drm_submit,
+};
+
+static const struct vic_config vic_t124_config = {
+ .firmware = "nvidia/tegra124/vic03_ucode.bin",
+};
+
+static const struct vic_config vic_t210_config = {
+ .firmware = "nvidia/tegra210/vic04_ucode.bin",
+};
+
+static const struct of_device_id vic_match[] = {
+ { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
+ { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
+ { },
+};
+
+static int vic_probe(struct platform_device *pdev)
+{
+ struct vic_config *vic_config = NULL;
+ struct device *dev = &pdev->dev;
+ struct host1x_syncpt **syncpts;
+ struct resource *regs;
+ const struct of_device_id *match;
+ struct vic *vic;
+ int err;
+
+ match = of_match_device(vic_match, dev);
+ vic_config = (struct vic_config *)match->data;
+
+ vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
+ if (!vic)
+ return -ENOMEM;
+
+ syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
+ if (!syncpts)
+ return -ENOMEM;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs) {
+ dev_err(&pdev->dev, "failed to get registers\n");
+ return -ENXIO;
+ }
+
+ vic->regs = devm_ioremap_resource(dev, regs);
+ if (IS_ERR(vic->regs))
+ return PTR_ERR(vic->regs);
+
+ vic->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(vic->clk)) {
+ dev_err(&pdev->dev, "failed to get clock\n");
+ return PTR_ERR(vic->clk);
+ }
+
+ vic->falcon.dev = dev;
+ vic->falcon.regs = vic->regs;
+ vic->falcon.ops = &vic_falcon_ops;
+
+ err = falcon_init(&vic->falcon);
+ if (err < 0)
+ return err;
+
+ err = falcon_read_firmware(&vic->falcon, vic_config->firmware);
+ if (err < 0)
+ goto exit_falcon;
+
+ platform_set_drvdata(pdev, vic);
+
+ INIT_LIST_HEAD(&vic->client.base.list);
+ vic->client.base.ops = &vic_client_ops;
+ vic->client.base.dev = dev;
+ vic->client.base.class = HOST1X_CLASS_VIC;
+ vic->client.base.syncpts = syncpts;
+ vic->client.base.num_syncpts = 1;
+ vic->dev = dev;
+ vic->config = vic_config;
+
+ INIT_LIST_HEAD(&vic->client.list);
+ vic->client.ops = &vic_ops;
+
+ err = host1x_client_register(&vic->client.base);
+ if (err < 0) {
+ dev_err(dev, "failed to register host1x client: %d\n", err);
+ platform_set_drvdata(pdev, NULL);
+ goto exit_falcon;
+ }
+
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ err = vic_runtime_resume(&pdev->dev);
+ if (err < 0)
+ goto unregister_client;
+ }
+
+ return 0;
+
+unregister_client:
+ host1x_client_unregister(&vic->client.base);
+exit_falcon:
+ falcon_exit(&vic->falcon);
+
+ return err;
+}
+
+static int vic_remove(struct platform_device *pdev)
+{
+ struct vic *vic = platform_get_drvdata(pdev);
+ int err;
+
+ err = host1x_client_unregister(&vic->client.base);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
+ err);
+ return err;
+ }
+
+ if (pm_runtime_enabled(&pdev->dev))
+ pm_runtime_disable(&pdev->dev);
+ else
+ vic_runtime_suspend(&pdev->dev);
+
+ falcon_exit(&vic->falcon);
+
+ return 0;
+}
+
+static const struct dev_pm_ops vic_pm_ops = {
+ SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
+};
+
+struct platform_driver tegra_vic_driver = {
+ .driver = {
+ .name = "tegra-vic",
+ .of_match_table = vic_match,
+ .pm = &vic_pm_ops
+ },
+ .probe = vic_probe,
+ .remove = vic_remove,
+};
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff