1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
new file mode 100644
index 0000000..1b1a4f3
--- /dev/null
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2017 Linaro Ltd.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/slab.h>
+#include <linux/qcom_scm.h>
+#include <linux/soc/qcom/mdt_loader.h>
+
+#include "firmware.h"
+
+#define VENUS_PAS_ID			9
+#define VENUS_FW_MEM_SIZE		SZ_8M
+
+static void device_release_dummy(struct device *dev)
+{
+	of_reserved_mem_device_release(dev);
+}
+
+int venus_boot(struct device *parent, struct device *fw_dev, const char *fwname)
+{
+	const struct firmware *mdt;
+	phys_addr_t mem_phys;
+	ssize_t fw_size;
+	size_t mem_size;
+	void *mem_va;
+	int ret;
+
+	if (!qcom_scm_is_available())
+		return -EPROBE_DEFER;
+
+	fw_dev->parent = parent;
+	fw_dev->release = device_release_dummy;
+
+	ret = dev_set_name(fw_dev, "%s:%s", dev_name(parent), "firmware");
+	if (ret)
+		return ret;
+
+	ret = device_register(fw_dev);
+	if (ret < 0)
+		return ret;
+
+	ret = of_reserved_mem_device_init_by_idx(fw_dev, parent->of_node, 0);
+	if (ret)
+		goto err_unreg_device;
+
+	mem_size = VENUS_FW_MEM_SIZE;
+
+	mem_va = dmam_alloc_coherent(fw_dev, mem_size, &mem_phys, GFP_KERNEL);
+	if (!mem_va) {
+		ret = -ENOMEM;
+		goto err_unreg_device;
+	}
+
+	ret = request_firmware(&mdt, fwname, fw_dev);
+	if (ret < 0)
+		goto err_unreg_device;
+
+	fw_size = qcom_mdt_get_size(mdt);
+	if (fw_size < 0) {
+		ret = fw_size;
+		release_firmware(mdt);
+		goto err_unreg_device;
+	}
+
+	ret = qcom_mdt_load(fw_dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
+			    mem_size);
+
+	release_firmware(mdt);
+
+	if (ret)
+		goto err_unreg_device;
+
+	ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
+	if (ret)
+		goto err_unreg_device;
+
+	return 0;
+
+err_unreg_device:
+	device_unregister(fw_dev);
+	return ret;
+}
+
+int venus_shutdown(struct device *fw_dev)
+{
+	int ret;
+
+	ret = qcom_scm_pas_shutdown(VENUS_PAS_ID);
+	device_unregister(fw_dev);
+	memset(fw_dev, 0, sizeof(*fw_dev));
+
+	return ret;
+}