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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * AMD MP2 1.1 communication driver
0004  *
0005  * Copyright (c) 2022, Advanced Micro Devices, Inc.
0006  * All Rights Reserved.
0007  *
0008  * Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
0009  */
0010 
0011 #include <linux/delay.h>
0012 #include <linux/hid.h>
0013 
0014 #include "amd_sfh_init.h"
0015 #include "amd_sfh_interface.h"
0016 #include "../hid_descriptor/amd_sfh_hid_desc.h"
0017 
0018 static int amd_sfh_get_sensor_num(struct amd_mp2_dev *mp2, u8 *sensor_id)
0019 {
0020     struct sfh_sensor_list *slist;
0021     struct sfh_base_info binfo;
0022     int num_of_sensors = 0;
0023     int i;
0024 
0025     memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
0026     slist = &binfo.sbase.s_list;
0027 
0028     for (i = 0; i < MAX_IDX; i++) {
0029         switch (i) {
0030         case ACCEL_IDX:
0031         case GYRO_IDX:
0032         case MAG_IDX:
0033         case ALS_IDX:
0034         case HPD_IDX:
0035             if (BIT(i) & slist->sl.sensors)
0036                 sensor_id[num_of_sensors++] = i;
0037             break;
0038         }
0039     }
0040 
0041     return num_of_sensors;
0042 }
0043 
0044 static u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id)
0045 {
0046     if (mp2->mp2_ops->response)
0047         return mp2->mp2_ops->response(mp2, sid, cmd_id);
0048 
0049     return 0;
0050 }
0051 
0052 static const char *get_sensor_name(int idx)
0053 {
0054     switch (idx) {
0055     case ACCEL_IDX:
0056         return "accelerometer";
0057     case GYRO_IDX:
0058         return "gyroscope";
0059     case MAG_IDX:
0060         return "magnetometer";
0061     case ALS_IDX:
0062         return "ALS";
0063     case HPD_IDX:
0064         return "HPD";
0065     default:
0066         return "unknown sensor type";
0067     }
0068 }
0069 
0070 static int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
0071 {
0072     struct amdtp_cl_data *cl_data = privdata->cl_data;
0073     int i, status;
0074 
0075     for (i = 0; i < cl_data->num_hid_devices; i++) {
0076         if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
0077             privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
0078             status = amd_sfh_wait_for_response
0079                     (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
0080             if (status == 0)
0081                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
0082             dev_dbg(&privdata->pdev->dev, "stopping sid 0x%x (%s) status 0x%x\n",
0083                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
0084                 cl_data->sensor_sts[i]);
0085         }
0086     }
0087 
0088     cancel_delayed_work_sync(&cl_data->work);
0089     cancel_delayed_work_sync(&cl_data->work_buffer);
0090     amdtp_hid_remove(cl_data);
0091 
0092     return 0;
0093 }
0094 
0095 static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata)
0096 {
0097     struct amd_input_data *in_data = &privdata->in_data;
0098     struct amdtp_cl_data *cl_data = privdata->cl_data;
0099     struct amd_mp2_ops *mp2_ops = privdata->mp2_ops;
0100     struct amd_mp2_sensor_info info;
0101     struct request_list *req_list;
0102     u32 feature_report_size;
0103     u32 input_report_size;
0104     struct device *dev;
0105     int rc, i, status;
0106     u8 cl_idx;
0107 
0108     req_list = &cl_data->req_list;
0109     dev = &privdata->pdev->dev;
0110     amd_sfh1_1_set_desc_ops(mp2_ops);
0111 
0112     cl_data->num_hid_devices = amd_sfh_get_sensor_num(privdata, &cl_data->sensor_idx[0]);
0113 
0114     INIT_DELAYED_WORK(&cl_data->work, amd_sfh_work);
0115     INIT_DELAYED_WORK(&cl_data->work_buffer, amd_sfh_work_buffer);
0116     INIT_LIST_HEAD(&req_list->list);
0117     cl_data->in_data = in_data;
0118 
0119     for (i = 0; i < cl_data->num_hid_devices; i++) {
0120         cl_data->sensor_sts[i] = SENSOR_DISABLED;
0121         cl_data->sensor_requested_cnt[i] = 0;
0122         cl_data->cur_hid_dev = i;
0123         cl_idx = cl_data->sensor_idx[i];
0124 
0125         cl_data->report_descr_sz[i] = mp2_ops->get_desc_sz(cl_idx, descr_size);
0126         if (!cl_data->report_descr_sz[i]) {
0127             rc = -EINVAL;
0128             goto cleanup;
0129         }
0130         feature_report_size = mp2_ops->get_desc_sz(cl_idx, feature_size);
0131         if (!feature_report_size) {
0132             rc = -EINVAL;
0133             goto cleanup;
0134         }
0135         input_report_size =  mp2_ops->get_desc_sz(cl_idx, input_size);
0136         if (!input_report_size) {
0137             rc = -EINVAL;
0138             goto cleanup;
0139         }
0140         cl_data->feature_report[i] = devm_kzalloc(dev, feature_report_size, GFP_KERNEL);
0141         if (!cl_data->feature_report[i]) {
0142             rc = -ENOMEM;
0143             goto cleanup;
0144         }
0145         in_data->input_report[i] = devm_kzalloc(dev, input_report_size, GFP_KERNEL);
0146         if (!in_data->input_report[i]) {
0147             rc = -ENOMEM;
0148             goto cleanup;
0149         }
0150 
0151         info.sensor_idx = cl_idx;
0152 
0153         cl_data->report_descr[i] =
0154             devm_kzalloc(dev, cl_data->report_descr_sz[i], GFP_KERNEL);
0155         if (!cl_data->report_descr[i]) {
0156             rc = -ENOMEM;
0157             goto cleanup;
0158         }
0159         rc = mp2_ops->get_rep_desc(cl_idx, cl_data->report_descr[i]);
0160         if (rc)
0161             return rc;
0162 
0163         writel(0, privdata->mmio + AMD_P2C_MSG(0));
0164         mp2_ops->start(privdata, info);
0165         status = amd_sfh_wait_for_response
0166                 (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR);
0167 
0168         status = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED;
0169 
0170         if (status == SENSOR_ENABLED) {
0171             cl_data->sensor_sts[i] = SENSOR_ENABLED;
0172             rc = amdtp_hid_probe(i, cl_data);
0173             if (rc) {
0174                 mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
0175                 status = amd_sfh_wait_for_response
0176                     (privdata, cl_data->sensor_idx[i], DISABLE_SENSOR);
0177                 if (status == 0)
0178                     status = SENSOR_DISABLED;
0179                 if (status != SENSOR_ENABLED)
0180                     cl_data->sensor_sts[i] = SENSOR_DISABLED;
0181                 dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
0182                     cl_data->sensor_idx[i],
0183                     get_sensor_name(cl_data->sensor_idx[i]),
0184                     cl_data->sensor_sts[i]);
0185                 goto cleanup;
0186             }
0187         }
0188         dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
0189             cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
0190             cl_data->sensor_sts[i]);
0191     }
0192 
0193     schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
0194     return 0;
0195 
0196 cleanup:
0197     amd_sfh_hid_client_deinit(privdata);
0198     for (i = 0; i < cl_data->num_hid_devices; i++) {
0199         devm_kfree(dev, cl_data->feature_report[i]);
0200         devm_kfree(dev, in_data->input_report[i]);
0201         devm_kfree(dev, cl_data->report_descr[i]);
0202     }
0203     return rc;
0204 }
0205 
0206 static void amd_sfh_resume(struct amd_mp2_dev *mp2)
0207 {
0208     struct amdtp_cl_data *cl_data = mp2->cl_data;
0209     struct amd_mp2_sensor_info info;
0210     int i, status;
0211 
0212     for (i = 0; i < cl_data->num_hid_devices; i++) {
0213         if (cl_data->sensor_sts[i] == SENSOR_DISABLED) {
0214             info.sensor_idx = cl_data->sensor_idx[i];
0215             mp2->mp2_ops->start(mp2, info);
0216             status = amd_sfh_wait_for_response
0217                     (mp2, cl_data->sensor_idx[i], ENABLE_SENSOR);
0218             if (status == 0)
0219                 status = SENSOR_ENABLED;
0220             if (status == SENSOR_ENABLED)
0221                 cl_data->sensor_sts[i] = SENSOR_ENABLED;
0222             dev_dbg(&mp2->pdev->dev, "resume sid 0x%x (%s) status 0x%x\n",
0223                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
0224                 cl_data->sensor_sts[i]);
0225         }
0226     }
0227 
0228     schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
0229     amd_sfh_clear_intr(mp2);
0230 }
0231 
0232 static void amd_sfh_suspend(struct amd_mp2_dev *mp2)
0233 {
0234     struct amdtp_cl_data *cl_data = mp2->cl_data;
0235     int i, status;
0236 
0237     for (i = 0; i < cl_data->num_hid_devices; i++) {
0238         if (cl_data->sensor_idx[i] != HPD_IDX &&
0239             cl_data->sensor_sts[i] == SENSOR_ENABLED) {
0240             mp2->mp2_ops->stop(mp2, cl_data->sensor_idx[i]);
0241             status = amd_sfh_wait_for_response
0242                     (mp2, cl_data->sensor_idx[i], DISABLE_SENSOR);
0243             if (status == 0)
0244                 status = SENSOR_DISABLED;
0245             if (status != SENSOR_ENABLED)
0246                 cl_data->sensor_sts[i] = SENSOR_DISABLED;
0247             dev_dbg(&mp2->pdev->dev, "suspend sid 0x%x (%s) status 0x%x\n",
0248                 cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
0249                 cl_data->sensor_sts[i]);
0250         }
0251     }
0252 
0253     cancel_delayed_work_sync(&cl_data->work_buffer);
0254     amd_sfh_clear_intr(mp2);
0255 }
0256 
0257 static void amd_mp2_pci_remove(void *privdata)
0258 {
0259     struct amd_mp2_dev *mp2 = privdata;
0260 
0261     amd_sfh_hid_client_deinit(privdata);
0262     mp2->mp2_ops->stop_all(mp2);
0263     pci_intx(mp2->pdev, false);
0264     amd_sfh_clear_intr(mp2);
0265 }
0266 
0267 static void amd_sfh_set_ops(struct amd_mp2_dev *mp2)
0268 {
0269     struct amd_mp2_ops *mp2_ops;
0270 
0271     sfh_interface_init(mp2);
0272     mp2_ops = mp2->mp2_ops;
0273     mp2_ops->clear_intr = amd_sfh_clear_intr_v2,
0274     mp2_ops->init_intr = amd_sfh_irq_init_v2,
0275     mp2_ops->suspend = amd_sfh_suspend;
0276     mp2_ops->resume = amd_sfh_resume;
0277     mp2_ops->remove = amd_mp2_pci_remove;
0278 }
0279 
0280 int amd_sfh1_1_init(struct amd_mp2_dev *mp2)
0281 {
0282     u32 phy_base = readl(mp2->mmio + AMD_C2P_MSG(22));
0283     struct device *dev = &mp2->pdev->dev;
0284     struct sfh_base_info binfo;
0285     int rc;
0286 
0287     phy_base <<= 21;
0288     if (!devm_request_mem_region(dev, phy_base, 128 * 1024, "amd_sfh")) {
0289         dev_err(dev, "can't reserve mmio registers\n");
0290         return -ENOMEM;
0291     }
0292 
0293     mp2->vsbase = devm_ioremap(dev, phy_base, 128 * 1024);
0294     if (!mp2->vsbase) {
0295         dev_err(dev, "failed to remap vsbase\n");
0296         return -ENOMEM;
0297     }
0298 
0299     /* Before accessing give time for SFH firmware for processing configuration */
0300     msleep(5000);
0301 
0302     memcpy_fromio(&binfo, mp2->vsbase, sizeof(struct sfh_base_info));
0303     if (binfo.sbase.fw_info.fw_ver == 0 || binfo.sbase.s_list.sl.sensors == 0) {
0304         dev_err(dev, "failed to get sensors\n");
0305         return -EOPNOTSUPP;
0306     }
0307     dev_dbg(dev, "firmware version 0x%x\n", binfo.sbase.fw_info.fw_ver);
0308 
0309     amd_sfh_set_ops(mp2);
0310 
0311     rc = amd_sfh_irq_init(mp2);
0312     if (rc) {
0313         dev_err(dev, "amd_sfh_irq_init failed\n");
0314         return rc;
0315     }
0316 
0317     rc = amd_sfh1_1_hid_client_init(mp2);
0318     if (rc) {
0319         dev_err(dev, "amd_sfh1_1_hid_client_init failed\n");
0320         return rc;
0321     }
0322 
0323     return rc;
0324 }
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