1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2021, Linaro Limited 3 4 #include <linux/slab.h> 5 #include <linux/wait.h> 6 #include <linux/kernel.h> 7 #include <linux/module.h> 8 #include <linux/of.h> 9 #include <linux/delay.h> 10 #include <linux/of_platform.h> 11 #include <linux/jiffies.h> 12 #include <linux/soc/qcom/apr.h> 13 #include <dt-bindings/soc/qcom,gpr.h> 14 #include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h> 15 #include "q6prm.h" 16 #include "audioreach.h" 17 18 struct q6prm { 19 struct device *dev; 20 gpr_device_t *gdev; 21 wait_queue_head_t wait; 22 struct gpr_ibasic_rsp_result_t result; 23 struct mutex lock; 24 }; 25 26 #define PRM_CMD_REQUEST_HW_RSC 0x0100100F 27 #define PRM_CMD_RSP_REQUEST_HW_RSC 0x02001002 28 #define PRM_CMD_RELEASE_HW_RSC 0x01001010 29 #define PRM_CMD_RSP_RELEASE_HW_RSC 0x02001003 30 #define PARAM_ID_RSC_HW_CORE 0x08001032 31 #define PARAM_ID_RSC_LPASS_CORE 0x0800102B 32 #define PARAM_ID_RSC_AUDIO_HW_CLK 0x0800102C 33 34 struct prm_cmd_request_hw_core { 35 struct apm_module_param_data param_data; 36 uint32_t hw_clk_id; 37 } __packed; 38 39 struct prm_cmd_request_rsc { 40 struct apm_module_param_data param_data; 41 uint32_t num_clk_id; 42 struct audio_hw_clk_cfg clock_id; 43 } __packed; 44 45 struct prm_cmd_release_rsc { 46 struct apm_module_param_data param_data; 47 uint32_t num_clk_id; 48 struct audio_hw_clk_rel_cfg clock_id; 49 } __packed; 50 51 static int q6prm_send_cmd_sync(struct q6prm *prm, struct gpr_pkt *pkt, uint32_t rsp_opcode) 52 { 53 return audioreach_send_cmd_sync(prm->dev, prm->gdev, &prm->result, &prm->lock, 54 NULL, &prm->wait, pkt, rsp_opcode); 55 } 56 57 static int q6prm_set_hw_core_req(struct device *dev, uint32_t hw_block_id, bool enable) 58 { 59 struct q6prm *prm = dev_get_drvdata(dev->parent); 60 struct apm_module_param_data *param_data; 61 struct prm_cmd_request_hw_core *req; 62 gpr_device_t *gdev = prm->gdev; 63 uint32_t opcode, rsp_opcode; 64 struct gpr_pkt *pkt; 65 int rc; 66 67 if (enable) { 68 opcode = PRM_CMD_REQUEST_HW_RSC; 69 rsp_opcode = PRM_CMD_RSP_REQUEST_HW_RSC; 70 } else { 71 opcode = PRM_CMD_RELEASE_HW_RSC; 72 rsp_opcode = PRM_CMD_RSP_RELEASE_HW_RSC; 73 } 74 75 pkt = audioreach_alloc_cmd_pkt(sizeof(*req), opcode, 0, gdev->svc.id, GPR_PRM_MODULE_IID); 76 if (IS_ERR(pkt)) 77 return PTR_ERR(pkt); 78 79 req = (void *)pkt + GPR_HDR_SIZE + APM_CMD_HDR_SIZE; 80 81 param_data = &req->param_data; 82 83 param_data->module_instance_id = GPR_PRM_MODULE_IID; 84 param_data->error_code = 0; 85 param_data->param_id = PARAM_ID_RSC_HW_CORE; 86 param_data->param_size = sizeof(*req) - APM_MODULE_PARAM_DATA_SIZE; 87 88 req->hw_clk_id = hw_block_id; 89 90 rc = q6prm_send_cmd_sync(prm, pkt, rsp_opcode); 91 92 kfree(pkt); 93 94 return rc; 95 } 96 97 int q6prm_vote_lpass_core_hw(struct device *dev, uint32_t hw_block_id, 98 const char *client_name, uint32_t *client_handle) 99 { 100 return q6prm_set_hw_core_req(dev, hw_block_id, true); 101 102 } 103 EXPORT_SYMBOL_GPL(q6prm_vote_lpass_core_hw); 104 105 int q6prm_unvote_lpass_core_hw(struct device *dev, uint32_t hw_block_id, uint32_t client_handle) 106 { 107 return q6prm_set_hw_core_req(dev, hw_block_id, false); 108 } 109 EXPORT_SYMBOL_GPL(q6prm_unvote_lpass_core_hw); 110 111 static int q6prm_request_lpass_clock(struct device *dev, int clk_id, int clk_attr, int clk_root, 112 unsigned int freq) 113 { 114 struct q6prm *prm = dev_get_drvdata(dev->parent); 115 struct apm_module_param_data *param_data; 116 struct prm_cmd_request_rsc *req; 117 gpr_device_t *gdev = prm->gdev; 118 struct gpr_pkt *pkt; 119 int rc; 120 121 pkt = audioreach_alloc_cmd_pkt(sizeof(*req), PRM_CMD_REQUEST_HW_RSC, 0, gdev->svc.id, 122 GPR_PRM_MODULE_IID); 123 if (IS_ERR(pkt)) 124 return PTR_ERR(pkt); 125 126 req = (void *)pkt + GPR_HDR_SIZE + APM_CMD_HDR_SIZE; 127 128 param_data = &req->param_data; 129 130 param_data->module_instance_id = GPR_PRM_MODULE_IID; 131 param_data->error_code = 0; 132 param_data->param_id = PARAM_ID_RSC_AUDIO_HW_CLK; 133 param_data->param_size = sizeof(*req) - APM_MODULE_PARAM_DATA_SIZE; 134 135 req->num_clk_id = 1; 136 req->clock_id.clock_id = clk_id; 137 req->clock_id.clock_freq = freq; 138 req->clock_id.clock_attri = clk_attr; 139 req->clock_id.clock_root = clk_root; 140 141 rc = q6prm_send_cmd_sync(prm, pkt, PRM_CMD_RSP_REQUEST_HW_RSC); 142 143 kfree(pkt); 144 145 return rc; 146 } 147 148 static int q6prm_release_lpass_clock(struct device *dev, int clk_id, int clk_attr, int clk_root, 149 unsigned int freq) 150 { 151 struct q6prm *prm = dev_get_drvdata(dev->parent); 152 struct apm_module_param_data *param_data; 153 struct prm_cmd_release_rsc *rel; 154 gpr_device_t *gdev = prm->gdev; 155 struct gpr_pkt *pkt; 156 int rc; 157 158 pkt = audioreach_alloc_cmd_pkt(sizeof(*rel), PRM_CMD_RELEASE_HW_RSC, 0, gdev->svc.id, 159 GPR_PRM_MODULE_IID); 160 if (IS_ERR(pkt)) 161 return PTR_ERR(pkt); 162 163 rel = (void *)pkt + GPR_HDR_SIZE + APM_CMD_HDR_SIZE; 164 165 param_data = &rel->param_data; 166 167 param_data->module_instance_id = GPR_PRM_MODULE_IID; 168 param_data->error_code = 0; 169 param_data->param_id = PARAM_ID_RSC_AUDIO_HW_CLK; 170 param_data->param_size = sizeof(*rel) - APM_MODULE_PARAM_DATA_SIZE; 171 172 rel->num_clk_id = 1; 173 rel->clock_id.clock_id = clk_id; 174 175 rc = q6prm_send_cmd_sync(prm, pkt, PRM_CMD_RSP_RELEASE_HW_RSC); 176 177 kfree(pkt); 178 179 return rc; 180 } 181 182 int q6prm_set_lpass_clock(struct device *dev, int clk_id, int clk_attr, int clk_root, 183 unsigned int freq) 184 { 185 if (freq) 186 return q6prm_request_lpass_clock(dev, clk_id, clk_attr, clk_attr, freq); 187 188 return q6prm_release_lpass_clock(dev, clk_id, clk_attr, clk_attr, freq); 189 } 190 EXPORT_SYMBOL_GPL(q6prm_set_lpass_clock); 191 192 static int prm_callback(struct gpr_resp_pkt *data, void *priv, int op) 193 { 194 gpr_device_t *gdev = priv; 195 struct q6prm *prm = dev_get_drvdata(&gdev->dev); 196 struct gpr_ibasic_rsp_result_t *result; 197 struct gpr_hdr *hdr = &data->hdr; 198 199 switch (hdr->opcode) { 200 case PRM_CMD_RSP_REQUEST_HW_RSC: 201 case PRM_CMD_RSP_RELEASE_HW_RSC: 202 result = data->payload; 203 prm->result.opcode = hdr->opcode; 204 prm->result.status = result->status; 205 wake_up(&prm->wait); 206 break; 207 default: 208 break; 209 } 210 211 return 0; 212 } 213 214 static int prm_probe(gpr_device_t *gdev) 215 { 216 struct device *dev = &gdev->dev; 217 struct q6prm *cc; 218 219 cc = devm_kzalloc(dev, sizeof(*cc), GFP_KERNEL); 220 if (!cc) 221 return -ENOMEM; 222 223 cc->dev = dev; 224 cc->gdev = gdev; 225 mutex_init(&cc->lock); 226 init_waitqueue_head(&cc->wait); 227 dev_set_drvdata(dev, cc); 228 229 return devm_of_platform_populate(dev); 230 } 231 232 #ifdef CONFIG_OF 233 static const struct of_device_id prm_device_id[] = { 234 { .compatible = "qcom,q6prm" }, 235 {}, 236 }; 237 MODULE_DEVICE_TABLE(of, prm_device_id); 238 #endif 239 240 static gpr_driver_t prm_driver = { 241 .probe = prm_probe, 242 .gpr_callback = prm_callback, 243 .driver = { 244 .name = "qcom-prm", 245 .of_match_table = of_match_ptr(prm_device_id), 246 }, 247 }; 248 249 module_gpr_driver(prm_driver); 250 MODULE_DESCRIPTION("Audio Process Manager"); 251 MODULE_LICENSE("GPL"); 252