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 IRIS_PAS_ID 9 16 17 #define MAX_FIRMWARE_NAME_SIZE 128 18 19 static int iris_load_fw_to_memory(struct iris_core *core, const char *fw_name) 20 { 21 const struct firmware *firmware = NULL; 22 struct device *dev = core->dev; 23 struct resource res; 24 phys_addr_t mem_phys; 25 size_t res_size; 26 ssize_t fw_size; 27 void *mem_virt; 28 int ret; 29 30 if (strlen(fw_name) >= MAX_FIRMWARE_NAME_SIZE - 4) 31 return -EINVAL; 32 33 ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res); 34 if (ret) 35 return ret; 36 37 mem_phys = res.start; 38 res_size = resource_size(&res); 39 40 ret = request_firmware(&firmware, fw_name, dev); 41 if (ret) 42 return ret; 43 44 fw_size = qcom_mdt_get_size(firmware); 45 if (fw_size < 0 || res_size < (size_t)fw_size) { 46 ret = -EINVAL; 47 goto err_release_fw; 48 } 49 50 mem_virt = memremap(mem_phys, res_size, MEMREMAP_WC); 51 if (!mem_virt) { 52 ret = -ENOMEM; 53 goto err_release_fw; 54 } 55 56 ret = qcom_mdt_load(dev, firmware, fw_name, 57 IRIS_PAS_ID, mem_virt, mem_phys, res_size, NULL); 58 59 memunmap(mem_virt); 60 err_release_fw: 61 release_firmware(firmware); 62 63 return ret; 64 } 65 66 int iris_fw_load(struct iris_core *core) 67 { 68 const struct tz_cp_config *cp_config; 69 const char *fwpath = NULL; 70 int i, ret; 71 72 ret = of_property_read_string_index(core->dev->of_node, "firmware-name", 0, 73 &fwpath); 74 if (ret) 75 fwpath = core->iris_firmware_desc->fwname; 76 77 ret = iris_load_fw_to_memory(core, fwpath); 78 if (ret) { 79 dev_err(core->dev, "firmware download failed\n"); 80 return -ENOMEM; 81 } 82 83 ret = qcom_scm_pas_auth_and_reset(IRIS_PAS_ID); 84 if (ret) { 85 dev_err(core->dev, "auth and reset failed: %d\n", ret); 86 return ret; 87 } 88 89 for (i = 0; i < core->iris_platform_data->tz_cp_config_data_size; i++) { 90 cp_config = &core->iris_platform_data->tz_cp_config_data[i]; 91 ret = qcom_scm_mem_protect_video_var(cp_config->cp_start, 92 cp_config->cp_size, 93 cp_config->cp_nonpixel_start, 94 cp_config->cp_nonpixel_size); 95 if (ret) { 96 dev_err(core->dev, "qcom_scm_mem_protect_video_var failed: %d\n", ret); 97 qcom_scm_pas_shutdown(IRIS_PAS_ID); 98 return ret; 99 } 100 } 101 102 return ret; 103 } 104 105 int iris_fw_unload(struct iris_core *core) 106 { 107 return qcom_scm_pas_shutdown(IRIS_PAS_ID); 108 } 109 110 int iris_set_hw_state(struct iris_core *core, bool resume) 111 { 112 return qcom_scm_set_remote_state(resume, 0); 113 } 114