// SPDX-License-Identifier: GPL-2.0-or-later /* * AMD MP2 PCIe communication driver * Copyright 2020 Advanced Micro Devices, Inc. * * Authors: Shyam Sundar S K * Sandeep Singh */ #include #include #include #include #include #include #include #include #include #include "amd_sfh_pcie.h" #define DRIVER_NAME "pcie_mp2_amd" #define DRIVER_DESC "AMD(R) PCIe MP2 Communication Driver" #define ACEL_EN BIT(0) #define GYRO_EN BIT(1) #define MAGNO_EN BIT(2) #define HPD_EN BIT(16) #define ALS_EN BIT(19) static int sensor_mask_override = -1; module_param_named(sensor_mask, sensor_mask_override, int, 0444); MODULE_PARM_DESC(sensor_mask, "override the detected sensors mask"); static int amd_sfh_wait_response_v2(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts) { union cmd_response cmd_resp; /* Get response with status within a max of 800 ms timeout */ if (!readl_poll_timeout(mp2->mmio + AMD_P2C_MSG(0), cmd_resp.resp, (cmd_resp.response_v2.response == sensor_sts && cmd_resp.response_v2.status == 0 && (sid == 0xff || cmd_resp.response_v2.sensor_id == sid)), 500, 800000)) return cmd_resp.response_v2.response; return SENSOR_DISABLED; } static void amd_start_sensor_v2(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info) { union sfh_cmd_base cmd_base; cmd_base.ul = 0; cmd_base.cmd_v2.cmd_id = ENABLE_SENSOR; cmd_base.cmd_v2.period = info.period; cmd_base.cmd_v2.sensor_id = info.sensor_idx; cmd_base.cmd_v2.length = 16; if (info.sensor_idx == als_idx) cmd_base.cmd_v2.mem_type = USE_C2P_REG; writeq(info.dma_address, privdata->mmio + AMD_C2P_MSG1); writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); } static void amd_stop_sensor_v2(struct amd_mp2_dev *privdata, u16 sensor_idx) { union sfh_cmd_base cmd_base; cmd_base.ul = 0; cmd_base.cmd_v2.cmd_id = DISABLE_SENSOR; cmd_base.cmd_v2.period = 0; cmd_base.cmd_v2.sensor_id = sensor_idx; cmd_base.cmd_v2.length = 16; writeq(0x0, privdata->mmio + AMD_C2P_MSG2); writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); } static void amd_stop_all_sensor_v2(struct amd_mp2_dev *privdata) { union sfh_cmd_base cmd_base; cmd_base.cmd_v2.cmd_id = STOP_ALL_SENSORS; cmd_base.cmd_v2.period = 0; cmd_base.cmd_v2.sensor_id = 0; writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); } void amd_start_sensor(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info) { union sfh_cmd_param cmd_param; union sfh_cmd_base cmd_base; /* fill up command register */ memset(&cmd_base, 0, sizeof(cmd_base)); cmd_base.s.cmd_id = ENABLE_SENSOR; cmd_base.s.period = info.period; cmd_base.s.sensor_id = info.sensor_idx; /* fill up command param register */ memset(&cmd_param, 0, sizeof(cmd_param)); cmd_param.s.buf_layout = 1; cmd_param.s.buf_length = 16; writeq(info.dma_address, privdata->mmio + AMD_C2P_MSG2); writel(cmd_param.ul, privdata->mmio + AMD_C2P_MSG1); writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); } void amd_stop_sensor(struct amd_mp2_dev *privdata, u16 sensor_idx) { union sfh_cmd_base cmd_base; /* fill up command register */ memset(&cmd_base, 0, sizeof(cmd_base)); cmd_base.s.cmd_id = DISABLE_SENSOR; cmd_base.s.period = 0; cmd_base.s.sensor_id = sensor_idx; writeq(0x0, privdata->mmio + AMD_C2P_MSG2); writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); } void amd_stop_all_sensors(struct amd_mp2_dev *privdata) { union sfh_cmd_base cmd_base; /* fill up command register */ memset(&cmd_base, 0, sizeof(cmd_base)); cmd_base.s.cmd_id = STOP_ALL_SENSORS; cmd_base.s.period = 0; cmd_base.s.sensor_id = 0; writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0); } static const struct dmi_system_id dmi_sensor_mask_overrides[] = { { .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY x360 Convertible 13-ag0xxx"), }, .driver_data = (void *)(ACEL_EN | MAGNO_EN), }, { .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY x360 Convertible 15-cp0xxx"), }, .driver_data = (void *)(ACEL_EN | MAGNO_EN), }, { } }; int amd_mp2_get_sensor_num(struct amd_mp2_dev *privdata, u8 *sensor_id) { int activestatus, num_of_sensors = 0; const struct dmi_system_id *dmi_id; if (sensor_mask_override == -1) { dmi_id = dmi_first_match(dmi_sensor_mask_overrides); if (dmi_id) sensor_mask_override = (long)dmi_id->driver_data; } if (sensor_mask_override >= 0) { activestatus = sensor_mask_override; } else { activestatus = privdata->mp2_acs >> 4; } if (ACEL_EN & activestatus) sensor_id[num_of_sensors++] = accel_idx; if (GYRO_EN & activestatus) sensor_id[num_of_sensors++] = gyro_idx; if (MAGNO_EN & activestatus) sensor_id[num_of_sensors++] = mag_idx; if (ALS_EN & activestatus) sensor_id[num_of_sensors++] = als_idx; if (HPD_EN & activestatus) sensor_id[num_of_sensors++] = HPD_IDX; return num_of_sensors; } static void amd_mp2_pci_remove(void *privdata) { struct amd_mp2_dev *mp2 = privdata; amd_sfh_hid_client_deinit(privdata); mp2->mp2_ops->stop_all(mp2); } static const struct amd_mp2_ops amd_sfh_ops_v2 = { .start = amd_start_sensor_v2, .stop = amd_stop_sensor_v2, .stop_all = amd_stop_all_sensor_v2, .response = amd_sfh_wait_response_v2, }; static const struct amd_mp2_ops amd_sfh_ops = { .start = amd_start_sensor, .stop = amd_stop_sensor, .stop_all = amd_stop_all_sensors, }; static void mp2_select_ops(struct amd_mp2_dev *privdata) { u8 acs; privdata->mp2_acs = readl(privdata->mmio + AMD_P2C_MSG3); acs = privdata->mp2_acs & GENMASK(3, 0); switch (acs) { case V2_STATUS: privdata->mp2_ops = &amd_sfh_ops_v2; break; default: privdata->mp2_ops = &amd_sfh_ops; break; } } static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct amd_mp2_dev *privdata; int rc; privdata = devm_kzalloc(&pdev->dev, sizeof(*privdata), GFP_KERNEL); if (!privdata) return -ENOMEM; privdata->pdev = pdev; pci_set_drvdata(pdev, privdata); rc = pcim_enable_device(pdev); if (rc) return rc; rc = pcim_iomap_regions(pdev, BIT(2), DRIVER_NAME); if (rc) return rc; privdata->mmio = pcim_iomap_table(pdev)[2]; pci_set_master(pdev); rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); if (rc) { rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); return rc; } privdata->cl_data = devm_kzalloc(&pdev->dev, sizeof(struct amdtp_cl_data), GFP_KERNEL); if (!privdata->cl_data) return -ENOMEM; rc = devm_add_action_or_reset(&pdev->dev, amd_mp2_pci_remove, privdata); if (rc) return rc; mp2_select_ops(privdata); return amd_sfh_hid_client_init(privdata); } static const struct pci_device_id amd_mp2_pci_tbl[] = { { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_MP2) }, { } }; MODULE_DEVICE_TABLE(pci, amd_mp2_pci_tbl); static struct pci_driver amd_mp2_pci_driver = { .name = DRIVER_NAME, .id_table = amd_mp2_pci_tbl, .probe = amd_mp2_pci_probe, }; module_pci_driver(amd_mp2_pci_driver); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("Shyam Sundar S K "); MODULE_AUTHOR("Sandeep Singh ");