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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/hid/amd-sfh-hid/amd_sfh_hid.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hid/amd-sfh-hid/amd_sfh_hid.c')
-rw-r--r--drivers/hid/amd-sfh-hid/amd_sfh_hid.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.c b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
new file mode 100644
index 000000000..1b18291fc
--- /dev/null
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * AMD MP2 Sensors transport driver
+ *
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
+ * Authors: Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.com>
+ * Sandeep Singh <sandeep.singh@amd.com>
+ * Basavaraj Natikar <Basavaraj.Natikar@amd.com>
+ */
+#include <linux/hid.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+
+#include "amd_sfh_hid.h"
+#include "amd_sfh_pcie.h"
+
+#define AMD_SFH_RESPONSE_TIMEOUT 1500
+
+/**
+ * amdtp_hid_parse() - hid-core .parse() callback
+ * @hid: hid device instance
+ *
+ * This function gets called during call to hid_add_device
+ *
+ * Return: 0 on success and non zero on error
+ */
+static int amdtp_hid_parse(struct hid_device *hid)
+{
+ struct amdtp_hid_data *hid_data = hid->driver_data;
+ struct amdtp_cl_data *cli_data = hid_data->cli_data;
+
+ return hid_parse_report(hid, cli_data->report_descr[hid_data->index],
+ cli_data->report_descr_sz[hid_data->index]);
+}
+
+/* Empty callbacks with success return code */
+static int amdtp_hid_start(struct hid_device *hid)
+{
+ return 0;
+}
+
+static void amdtp_hid_stop(struct hid_device *hid)
+{
+}
+
+static int amdtp_hid_open(struct hid_device *hid)
+{
+ return 0;
+}
+
+static void amdtp_hid_close(struct hid_device *hid)
+{
+}
+
+static int amdtp_raw_request(struct hid_device *hdev, u8 reportnum,
+ u8 *buf, size_t len, u8 rtype, int reqtype)
+{
+ return 0;
+}
+
+static void amdtp_hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
+{
+ int rc;
+
+ switch (reqtype) {
+ case HID_REQ_GET_REPORT:
+ rc = amd_sfh_get_report(hid, rep->id, rep->type);
+ if (rc)
+ dev_err(&hid->dev, "AMDSFH get report error\n");
+ break;
+ case HID_REQ_SET_REPORT:
+ amd_sfh_set_report(hid, rep->id, reqtype);
+ break;
+ default:
+ break;
+ }
+}
+
+static int amdtp_wait_for_response(struct hid_device *hid)
+{
+ struct amdtp_hid_data *hid_data = hid->driver_data;
+ struct amdtp_cl_data *cli_data = hid_data->cli_data;
+ int i, ret = 0;
+
+ for (i = 0; i < cli_data->num_hid_devices; i++) {
+ if (cli_data->hid_sensor_hubs[i] == hid)
+ break;
+ }
+
+ if (!cli_data->request_done[i])
+ ret = wait_event_interruptible_timeout(hid_data->hid_wait,
+ cli_data->request_done[i],
+ msecs_to_jiffies(AMD_SFH_RESPONSE_TIMEOUT));
+ if (ret == -ERESTARTSYS)
+ return -ERESTARTSYS;
+ else if (ret < 0)
+ return -ETIMEDOUT;
+ else
+ return 0;
+}
+
+void amdtp_hid_wakeup(struct hid_device *hid)
+{
+ struct amdtp_hid_data *hid_data;
+ struct amdtp_cl_data *cli_data;
+
+ if (hid) {
+ hid_data = hid->driver_data;
+ cli_data = hid_data->cli_data;
+ cli_data->request_done[cli_data->cur_hid_dev] = true;
+ wake_up_interruptible(&hid_data->hid_wait);
+ }
+}
+
+static struct hid_ll_driver amdtp_hid_ll_driver = {
+ .parse = amdtp_hid_parse,
+ .start = amdtp_hid_start,
+ .stop = amdtp_hid_stop,
+ .open = amdtp_hid_open,
+ .close = amdtp_hid_close,
+ .request = amdtp_hid_request,
+ .wait = amdtp_wait_for_response,
+ .raw_request = amdtp_raw_request,
+};
+
+int amdtp_hid_probe(u32 cur_hid_dev, struct amdtp_cl_data *cli_data)
+{
+ struct amd_mp2_dev *mp2 = container_of(cli_data->in_data, struct amd_mp2_dev, in_data);
+ struct device *dev = &mp2->pdev->dev;
+ struct hid_device *hid;
+ struct amdtp_hid_data *hid_data;
+ int rc;
+
+ hid = hid_allocate_device();
+ if (IS_ERR(hid))
+ return PTR_ERR(hid);
+
+ hid_data = kzalloc(sizeof(*hid_data), GFP_KERNEL);
+ if (!hid_data) {
+ rc = -ENOMEM;
+ goto err_hid_data;
+ }
+
+ hid->ll_driver = &amdtp_hid_ll_driver;
+ hid_data->index = cur_hid_dev;
+ hid_data->cli_data = cli_data;
+ init_waitqueue_head(&hid_data->hid_wait);
+
+ hid->driver_data = hid_data;
+ cli_data->hid_sensor_hubs[cur_hid_dev] = hid;
+ strscpy(hid->phys, dev->driver ? dev->driver->name : dev_name(dev),
+ sizeof(hid->phys));
+ hid->bus = BUS_AMD_SFH;
+ hid->vendor = AMD_SFH_HID_VENDOR;
+ hid->product = AMD_SFH_HID_PRODUCT;
+ snprintf(hid->name, sizeof(hid->name), "%s %04X:%04X", "hid-amdsfh",
+ hid->vendor, hid->product);
+
+ rc = hid_add_device(hid);
+ if (rc)
+ goto err_hid_device;
+ return 0;
+
+err_hid_device:
+ kfree(hid_data);
+err_hid_data:
+ hid_destroy_device(hid);
+ return rc;
+}
+
+void amdtp_hid_remove(struct amdtp_cl_data *cli_data)
+{
+ int i;
+
+ for (i = 0; i < cli_data->num_hid_devices; ++i) {
+ if (cli_data->hid_sensor_hubs[i]) {
+ kfree(cli_data->hid_sensor_hubs[i]->driver_data);
+ hid_destroy_device(cli_data->hid_sensor_hubs[i]);
+ cli_data->hid_sensor_hubs[i] = NULL;
+ }
+ }
+}