1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved. 4 */ 5 6 #include <linux/firmware.h> 7 #include <linux/firmware/qcom/qcom_scm.h> 8 #include <linux/of_address.h> 9 #include <linux/of_reserved_mem.h> 10 #include <linux/soc/qcom/mdt_loader.h> 11 12 #include "iris_core.h" 13 #include "iris_firmware.h" 14 15 #define MAX_FIRMWARE_NAME_SIZE 128 16 17 static int iris_load_fw_to_memory(struct iris_core *core, const char *fw_name) 18 { 19 u32 pas_id = core->iris_platform_data->pas_id; 20 const struct firmware *firmware = NULL; 21 struct device *dev = core->dev; 22 struct resource res; 23 phys_addr_t mem_phys; 24 size_t res_size; 25 ssize_t fw_size; 26 void *mem_virt; 27 int ret; 28 29 if (strlen(fw_name) >= MAX_FIRMWARE_NAME_SIZE - 4) 30 return -EINVAL; 31 32 ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res); 33 if (ret) 34 return ret; 35 36 mem_phys = res.start; 37 res_size = resource_size(&res); 38 39 ret = request_firmware(&firmware, fw_name, dev); 40 if (ret) 41 return ret; 42 43 fw_size = qcom_mdt_get_size(firmware); 44 if (fw_size < 0 || res_size < (size_t)fw_size) { 45 ret = -EINVAL; 46 goto err_release_fw; 47 } 48 49 mem_virt = memremap(mem_phys, res_size, MEMREMAP_WC); 50 if (!mem_virt) { 51 ret = -ENOMEM; 52 goto err_release_fw; 53 } 54 55 ret = qcom_mdt_load(dev, firmware, fw_name, 56 pas_id, mem_virt, mem_phys, res_size, NULL); 57 58 memunmap(mem_virt); 59 err_release_fw: 60 release_firmware(firmware); 61 62 return ret; 63 } 64 65 int iris_fw_load(struct iris_core *core) 66 { 67 struct tz_cp_config *cp_config = core->iris_platform_data->tz_cp_config_data; 68 const char *fwpath = NULL; 69 int ret; 70 71 ret = of_property_read_string_index(core->dev->of_node, "firmware-name", 0, 72 &fwpath); 73 if (ret) 74 fwpath = core->iris_platform_data->fwname; 75 76 ret = iris_load_fw_to_memory(core, fwpath); 77 if (ret) { 78 dev_err(core->dev, "firmware download failed\n"); 79 return -ENOMEM; 80 } 81 82 ret = qcom_scm_pas_auth_and_reset(core->iris_platform_data->pas_id); 83 if (ret) { 84 dev_err(core->dev, "auth and reset failed: %d\n", ret); 85 return ret; 86 } 87 88 ret = qcom_scm_mem_protect_video_var(cp_config->cp_start, 89 cp_config->cp_size, 90 cp_config->cp_nonpixel_start, 91 cp_config->cp_nonpixel_size); 92 if (ret) { 93 dev_err(core->dev, "protect memory failed\n"); 94 qcom_scm_pas_shutdown(core->iris_platform_data->pas_id); 95 return ret; 96 } 97 98 return ret; 99 } 100 101 int iris_fw_unload(struct iris_core *core) 102 { 103 return qcom_scm_pas_shutdown(core->iris_platform_data->pas_id); 104 } 105 106 int iris_set_hw_state(struct iris_core *core, bool resume) 107 { 108 return qcom_scm_set_remote_state(resume, 0); 109 } 110