--- /dev/null
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2013, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/mei_cl_bus.h>
+
+#include "mei_dev.h"
+#include "client.h"
+
+struct mei_nfc_cmd {
+ u8 command;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+ u8 sub_command;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_reply {
+ u8 command;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+ u8 sub_command;
+ u8 reply_status;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_if_version {
+ u8 radio_version_sw[3];
+ u8 reserved[3];
+ u8 radio_version_hw[3];
+ u8 i2c_addr;
+ u8 fw_ivn;
+ u8 vendor_id;
+ u8 radio_type;
+} __packed;
+
+struct mei_nfc_connect {
+ u8 fw_ivn;
+ u8 vendor_id;
+} __packed;
+
+struct mei_nfc_connect_resp {
+ u8 fw_ivn;
+ u8 vendor_id;
+ u16 me_major;
+ u16 me_minor;
+ u16 me_hotfix;
+ u16 me_build;
+} __packed;
+
+struct mei_nfc_hci_hdr {
+ u8 cmd;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+} __packed;
+
+#define MEI_NFC_CMD_MAINTENANCE 0x00
+#define MEI_NFC_CMD_HCI_SEND 0x01
+#define MEI_NFC_CMD_HCI_RECV 0x02
+
+#define MEI_NFC_SUBCMD_CONNECT 0x00
+#define MEI_NFC_SUBCMD_IF_VERSION 0x01
+
+#define MEI_NFC_HEADER_SIZE 10
+
+/** mei_nfc_dev - NFC mei device
+ *
+ * @cl: NFC host client
+ * @cl_info: NFC info host client
+ * @init_work: perform connection to the info client
+ * @fw_ivn: NFC Intervace Version Number
+ * @vendor_id: NFC manufacturer ID
+ * @radio_type: NFC radio type
+ */
+struct mei_nfc_dev {
+ struct mei_cl *cl;
+ struct mei_cl *cl_info;
+ struct work_struct init_work;
+ u8 fw_ivn;
+ u8 vendor_id;
+ u8 radio_type;
+};
+
+static struct mei_nfc_dev nfc_dev;
+
+/* UUIDs for NFC F/W clients */
+const uuid_le mei_nfc_guid = UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50,
+ 0x94, 0xd4, 0x50, 0x26,
+ 0x67, 0x23, 0x77, 0x5c);
+
+static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d,
+ 0x48, 0xa4, 0xef, 0xab,
+ 0xba, 0x8a, 0x12, 0x06);
+
+static void mei_nfc_free(struct mei_nfc_dev *ndev)
+{
+ if (ndev->cl) {
+ list_del(&ndev->cl->device_link);
+ mei_cl_unlink(ndev->cl);
+ kfree(ndev->cl);
+ }
+
+ if (ndev->cl_info) {
+ list_del(&ndev->cl_info->device_link);
+ mei_cl_unlink(ndev->cl_info);
+ kfree(ndev->cl_info);
+ }
+}
+
+static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
+{
+ struct mei_device *dev;
+ struct mei_cl *cl;
+
+ struct mei_nfc_cmd cmd;
+ struct mei_nfc_reply *reply = NULL;
+ struct mei_nfc_if_version *version;
+ size_t if_version_length;
+ int bytes_recv, ret;
+
+ cl = ndev->cl_info;
+ dev = cl->dev;
+
+ memset(&cmd, 0, sizeof(struct mei_nfc_cmd));
+ cmd.command = MEI_NFC_CMD_MAINTENANCE;
+ cmd.data_size = 1;
+ cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
+
+ ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd));
+ if (ret < 0) {
+ dev_err(&dev->pdev->dev, "Could not send IF version cmd\n");
+ return ret;
+ }
+
+ /* to be sure on the stack we alloc memory */
+ if_version_length = sizeof(struct mei_nfc_reply) +
+ sizeof(struct mei_nfc_if_version);
+
+ reply = kzalloc(if_version_length, GFP_KERNEL);
+ if (!reply)
+ return -ENOMEM;
+
+ bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length);
+ if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
+ dev_err(&dev->pdev->dev, "Could not read IF version\n");
+ ret = -EIO;
+ goto err;
+ }
+
+ version = (struct mei_nfc_if_version *)reply->data;
+
+ ndev->fw_ivn = version->fw_ivn;
+ ndev->vendor_id = version->vendor_id;
+ ndev->radio_type = version->radio_type;
+
+err:
+ kfree(reply);
+ return ret;
+}
+
+static void mei_nfc_init(struct work_struct *work)
+{
+ struct mei_device *dev;
+ struct mei_nfc_dev *ndev;
+ struct mei_cl *cl_info;
+
+ ndev = container_of(work, struct mei_nfc_dev, init_work);
+
+ cl_info = ndev->cl_info;
+ dev = cl_info->dev;
+
+ mutex_lock(&dev->device_lock);
+
+ if (mei_cl_connect(cl_info, NULL) < 0) {
+ mutex_unlock(&dev->device_lock);
+ dev_err(&dev->pdev->dev,
+ "Could not connect to the NFC INFO ME client");
+
+ goto err;
+ }
+
+ mutex_unlock(&dev->device_lock);
+
+ if (mei_nfc_if_version(ndev) < 0) {
+ dev_err(&dev->pdev->dev, "Could not get the NFC interfave version");
+
+ goto err;
+ }
+
+ dev_info(&dev->pdev->dev,
+ "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
+ ndev->fw_ivn, ndev->vendor_id, ndev->radio_type);
+
+ mutex_lock(&dev->device_lock);
+
+ if (mei_cl_disconnect(cl_info) < 0) {
+ mutex_unlock(&dev->device_lock);
+ dev_err(&dev->pdev->dev,
+ "Could not disconnect the NFC INFO ME client");
+
+ goto err;
+ }
+
+ mutex_unlock(&dev->device_lock);
+
+ return;
+
+err:
+ mei_nfc_free(ndev);
+
+ return;
+}
+
+
+int mei_nfc_host_init(struct mei_device *dev)
+{
+ struct mei_nfc_dev *ndev = &nfc_dev;
+ struct mei_cl *cl_info, *cl = NULL;
+ int i, ret;
+
+ /* already initialzed */
+ if (ndev->cl_info)
+ return 0;
+
+ cl_info = mei_cl_allocate(dev);
+ cl = mei_cl_allocate(dev);
+
+ if (!cl || !cl_info) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* check for valid client id */
+ i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
+ if (i < 0) {
+ dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
+ ret = -ENOENT;
+ goto err;
+ }
+
+ cl_info->me_client_id = dev->me_clients[i].client_id;
+
+ ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY);
+ if (ret)
+ goto err;
+
+ cl_info->device_uuid = mei_nfc_info_guid;
+
+ list_add_tail(&cl_info->device_link, &dev->device_list);
+
+ /* check for valid client id */
+ i = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
+ if (i < 0) {
+ dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
+ ret = -ENOENT;
+ goto err;
+ }
+
+ cl->me_client_id = dev->me_clients[i].client_id;
+
+ ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
+ if (ret)
+ goto err;
+
+ cl->device_uuid = mei_nfc_guid;
+
+ list_add_tail(&cl->device_link, &dev->device_list);
+
+ ndev->cl_info = cl_info;
+ ndev->cl = cl;
+
+ INIT_WORK(&ndev->init_work, mei_nfc_init);
+ schedule_work(&ndev->init_work);
+
+ return 0;
+
+err:
+ mei_nfc_free(ndev);
+
+ return ret;
+}
+
+void mei_nfc_host_exit(void)
+{
+ struct mei_nfc_dev *ndev = &nfc_dev;
+
+ mei_nfc_free(ndev);
+}
projects / ~shefty / rdma-dev.git / commitdiff