2 * Copyright (C) 2017 Linaro Ltd.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include <linux/device.h>
16 #include <linux/firmware.h>
17 #include <linux/kernel.h>
20 #include <linux/of_address.h>
21 #include <linux/qcom_scm.h>
22 #include <linux/sizes.h>
23 #include <linux/soc/qcom/mdt_loader.h>
27 #define VENUS_PAS_ID 9
28 #define VENUS_FW_MEM_SIZE (6 * SZ_1M)
30 int venus_boot(struct device *dev, const char *fwname)
32 const struct firmware *mdt;
33 struct device_node *node;
41 if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || !qcom_scm_is_available())
44 node = of_parse_phandle(dev->of_node, "memory-region", 0);
46 dev_err(dev, "no memory-region specified\n");
50 ret = of_address_to_resource(node, 0, &r);
55 mem_size = resource_size(&r);
57 if (mem_size < VENUS_FW_MEM_SIZE)
60 mem_va = memremap(r.start, mem_size, MEMREMAP_WC);
62 dev_err(dev, "unable to map memory region: %pa+%zx\n",
67 ret = request_firmware(&mdt, fwname, dev);
71 fw_size = qcom_mdt_get_size(mdt);
74 release_firmware(mdt);
78 ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
81 release_firmware(mdt);
86 ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
95 int venus_shutdown(struct device *dev)
97 return qcom_scm_pas_shutdown(VENUS_PAS_ID);