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 reserved_mem *rmem; 23 struct device_node *node; 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 node = of_parse_phandle(dev->of_node, "memory-region", 0); 34 if (!node) 35 return -EINVAL; 36 37 rmem = of_reserved_mem_lookup(node); 38 of_node_put(node); 39 if (!rmem) 40 return -EINVAL; 41 42 mem_phys = rmem->base; 43 res_size = rmem->size; 44 45 ret = request_firmware(&firmware, fw_name, dev); 46 if (ret) 47 return ret; 48 49 fw_size = qcom_mdt_get_size(firmware); 50 if (fw_size < 0 || res_size < (size_t)fw_size) { 51 ret = -EINVAL; 52 goto err_release_fw; 53 } 54 55 mem_virt = memremap(mem_phys, res_size, MEMREMAP_WC); 56 if (!mem_virt) 57 goto err_release_fw; 58 59 ret = qcom_mdt_load(dev, firmware, fw_name, 60 pas_id, mem_virt, mem_phys, res_size, NULL); 61 if (ret) 62 goto err_mem_unmap; 63 64 ret = qcom_scm_pas_auth_and_reset(pas_id); 65 if (ret) 66 goto err_mem_unmap; 67 68 return ret; 69 70 err_mem_unmap: 71 memunmap(mem_virt); 72 err_release_fw: 73 release_firmware(firmware); 74 75 return ret; 76 } 77 78 int iris_fw_load(struct iris_core *core) 79 { 80 struct tz_cp_config *cp_config = core->iris_platform_data->tz_cp_config_data; 81 const char *fwpath = NULL; 82 int ret; 83 84 ret = of_property_read_string_index(core->dev->of_node, "firmware-name", 0, 85 &fwpath); 86 if (ret) 87 fwpath = core->iris_platform_data->fwname; 88 89 ret = iris_load_fw_to_memory(core, fwpath); 90 if (ret) { 91 dev_err(core->dev, "firmware download failed\n"); 92 return -ENOMEM; 93 } 94 95 ret = qcom_scm_mem_protect_video_var(cp_config->cp_start, 96 cp_config->cp_size, 97 cp_config->cp_nonpixel_start, 98 cp_config->cp_nonpixel_size); 99 if (ret) { 100 dev_err(core->dev, "protect memory failed\n"); 101 qcom_scm_pas_shutdown(core->iris_platform_data->pas_id); 102 return ret; 103 } 104 105 return ret; 106 } 107 108 int iris_fw_unload(struct iris_core *core) 109 { 110 return qcom_scm_pas_shutdown(core->iris_platform_data->pas_id); 111 } 112 113 int iris_set_hw_state(struct iris_core *core, bool resume) 114 { 115 return qcom_scm_set_remote_state(resume, 0); 116 } 117