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