@@ -12,5 +12,6 @@ intel-thc-objs += intel-thc/intel-thc-dma.o
obj-$(CONFIG_INTEL_QUICKSPI) += intel-quickspi.o
intel-quickspi-objs += intel-quickspi/pci-quickspi.o
intel-quickspi-objs += intel-quickspi/quickspi-hid.o
+intel-quickspi-objs += intel-quickspi/quickspi-protocol.o
ccflags-y += -I $(src)/intel-thc
@@ -4,7 +4,12 @@
#ifndef _QUICKSPI_DEV_H_
#define _QUICKSPI_DEV_H_
+#include <linux/bits.h>
#include <linux/hid-over-spi.h>
+#include <linux/sizes.h>
+#include <linux/wait.h>
+
+#include "quickspi-protocol.h"
#define PCI_DEVICE_ID_INTEL_THC_MTL_DEVICE_ID_SPI_PORT1 0x7E49
#define PCI_DEVICE_ID_INTEL_THC_MTL_DEVICE_ID_SPI_PORT2 0x7E4B
@@ -92,6 +97,21 @@ struct acpi_device;
* @active_ltr_val: THC active LTR value
* @low_power_ltr_val: THC low power LTR value
* @report_descriptor: store a copy of device report descriptor
+ * @input_buf: store a copy of latest input report data
+ * @report_buf: store a copy of latest input/output report packet from set/get feature
+ * @report_len: the length of input/output report packet
+ * @reset_ack_wq: workqueue for waiting reset response from device
+ * @reset_ack: indicate reset response received or not
+ * @nondma_int_received_wq: workqueue for waiting THC non-DMA interrupt
+ * @nondma_int_received: indicate THC non-DMA interrupt received or not
+ * @report_desc_got_wq: workqueue for waiting device report descritpor
+ * @report_desc_got: indicate device report descritor received or not
+ * @set_power_on_wq: workqueue for waiting set power on response from device
+ * @set_power_on: indicate set power on response received or not
+ * @get_feature_cmpl_wq: workqueue for waiting get feature response from device
+ * @get_feature_cmpl: indicate get feature received or not
+ * @set_feature_cmpl_wq: workqueue for waiting set feature to device
+ * @set_feature_cmpl: indicate set feature send complete or not
*/
struct quickspi_device {
struct device *dev;
@@ -121,6 +141,24 @@ struct quickspi_device {
u32 low_power_ltr_val;
u8 *report_descriptor;
+ u8 *input_buf;
+ u8 *report_buf;
+ u32 report_len;
+
+ wait_queue_head_t reset_ack_wq;
+ bool reset_ack;
+
+ wait_queue_head_t nondma_int_received_wq;
+ bool nondma_int_received;
+
+ wait_queue_head_t report_desc_got_wq;
+ bool report_desc_got;
+
+ wait_queue_head_t get_report_cmpl_wq;
+ bool get_report_cmpl;
+
+ wait_queue_head_t set_report_cmpl_wq;
+ bool set_report_cmpl;
};
#endif /* _QUICKSPI_DEV_H_ */
@@ -51,7 +51,22 @@ static int quickspi_hid_raw_request(struct hid_device *hid,
__u8 *buf, size_t len,
unsigned char rtype, int reqtype)
{
- return 0;
+ struct quickspi_device *qsdev = hid->driver_data;
+ int ret = 0;
+
+ switch (reqtype) {
+ case HID_REQ_GET_REPORT:
+ ret = quickspi_get_report(qsdev, rtype, reportnum, buf);
+ break;
+ case HID_REQ_SET_REPORT:
+ ret = quickspi_set_report(qsdev, rtype, reportnum, buf, len);
+ break;
+ default:
+ dev_err_once(qsdev->dev, "Not supported request type %d\n", reqtype);
+ break;
+ }
+
+ return ret;
}
static int quickspi_hid_power(struct hid_device *hid, int lvl)
new file mode 100644
@@ -0,0 +1,410 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright © 2024 Intel Corporation */
+
+#include <linux/acpi.h>
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/hid.h>
+
+#include "intel-thc-dev.h"
+#include "intel-thc-dma.h"
+
+#include "quickspi-dev.h"
+#include "quickspi-hid.h"
+#include "quickspi-protocol.h"
+
+/* THC uses HW to accelerate HID over SPI protocol, THC_M_PRT_DEV_INT_CAUSE
+ * register is used to store message header and body header, below definition
+ * let driver retrieve needed data filed easier from THC_M_PRT_DEV_INT_CAUSE
+ * register.
+ */
+#define HIDSPI_IN_REP_BDY_HDR_REP_TYPE GENMASK(7, 0)
+
+static int write_cmd_to_txdma(struct quickspi_device *qsdev,
+ int report_type, int report_id,
+ u8 *report_buf, const int report_buf_len)
+{
+ struct output_report *write_buf;
+ int write_buf_len;
+ int ret;
+
+ write_buf = (struct output_report *)qsdev->report_buf;
+
+ write_buf->output_hdr.report_type = report_type;
+ write_buf->output_hdr.content_len = cpu_to_le16(report_buf_len);
+ write_buf->output_hdr.content_id = report_id;
+
+ if (report_buf && report_buf_len > 0)
+ memcpy(write_buf->content, report_buf, report_buf_len);
+
+ write_buf_len = HIDSPI_OUTPUT_REPORT_SIZE(report_buf_len);
+
+ ret = thc_dma_write(qsdev->thc_hw, write_buf, write_buf_len);
+ if (ret)
+ dev_err_once(qsdev->dev, "DMA write failed, ret = %d\n", ret);
+
+ return ret;
+}
+
+static int quickspi_get_device_descriptor(struct quickspi_device *qsdev)
+{
+ u8 read_buf[HIDSPI_INPUT_DEVICE_DESCRIPTOR_SIZE];
+ struct output_report output_rep;
+ u32 input_len, read_len = 0;
+ u32 int_cause_val;
+ u8 input_rep_type;
+ int ret;
+
+ output_rep.output_hdr.report_type = DEVICE_DESCRIPTOR;
+ output_rep.output_hdr.content_len = 0;
+ output_rep.output_hdr.content_id = 0;
+
+ qsdev->nondma_int_received = false;
+
+ ret = thc_tic_pio_write(qsdev->thc_hw, qsdev->output_report_addr,
+ HIDSPI_OUTPUT_REPORT_SIZE(0), (u32 *)&output_rep);
+ if (ret) {
+ dev_err_once(qsdev->dev,
+ "Write DEVICE_DESCRIPTOR command failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = wait_event_interruptible_timeout(qsdev->nondma_int_received_wq,
+ qsdev->nondma_int_received,
+ QUICKSPI_ACK_WAIT_TIMEOUT * HZ);
+ if (ret <= 0 || !qsdev->nondma_int_received) {
+ dev_err_once(qsdev->dev, "Wait DEVICE_DESCRIPTOR timeout, ret:%d\n", ret);
+ return -ETIMEDOUT;
+ }
+ qsdev->nondma_int_received = false;
+
+ int_cause_val = thc_int_cause_read(qsdev->thc_hw);
+ input_len = FIELD_GET(HIDSPI_INPUT_HEADER_REPORT_LEN, int_cause_val);
+
+ input_len = input_len * sizeof(u32);
+ if (input_len != HIDSPI_INPUT_DEVICE_DESCRIPTOR_SIZE) {
+ dev_err_once(qsdev->dev, "Receive wrong DEVICE_DESCRIPTOR length, len = %u\n",
+ input_len);
+ return -EINVAL;
+ }
+
+ ret = thc_tic_pio_read(qsdev->thc_hw, qsdev->input_report_bdy_addr,
+ input_len, &read_len, (u32 *)read_buf);
+ if (ret || read_len != input_len) {
+ dev_err_once(qsdev->dev, "Read DEVICE_DESCRIPTOR failed, ret = %d\n", ret);
+ dev_err_once(qsdev->dev, "DEVICE_DESCRIPTOR expected len = %u, actual read = %u\n",
+ input_len, read_len);
+ return ret;
+ }
+
+ input_rep_type = ((struct input_report_body_header *)read_buf)->input_report_type;
+
+ if (input_rep_type == DEVICE_DESCRIPTOR_RESPONSE) {
+ memcpy(&qsdev->dev_desc,
+ read_buf + HIDSPI_INPUT_BODY_HEADER_SIZE,
+ HIDSPI_DEVICE_DESCRIPTOR_SIZE);
+
+ return 0;
+ }
+
+ dev_err_once(qsdev->dev, "Unexpected intput report type: %d\n", input_rep_type);
+ return -EINVAL;
+}
+
+int quickspi_get_report_descriptor(struct quickspi_device *qsdev)
+{
+ int ret;
+
+ ret = write_cmd_to_txdma(qsdev, REPORT_DESCRIPTOR, 0, NULL, 0);
+ if (ret) {
+ dev_err_once(qsdev->dev,
+ "Write REPORT_DESCRIPTOR command failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = wait_event_interruptible_timeout(qsdev->report_desc_got_wq,
+ qsdev->report_desc_got,
+ QUICKSPI_ACK_WAIT_TIMEOUT * HZ);
+ if (ret <= 0 || !qsdev->report_desc_got) {
+ dev_err_once(qsdev->dev, "Wait Report Descriptor timeout, ret:%d\n", ret);
+ return -ETIMEDOUT;
+ }
+ qsdev->report_desc_got = false;
+
+ return 0;
+}
+
+int quickspi_set_power(struct quickspi_device *qsdev,
+ enum hidspi_power_state power_state)
+{
+ u8 cmd_content = power_state;
+ int ret;
+
+ ret = write_cmd_to_txdma(qsdev, COMMAND_CONTENT,
+ HIDSPI_SET_POWER_CMD_ID,
+ &cmd_content,
+ sizeof(cmd_content));
+ if (ret) {
+ dev_err_once(qsdev->dev, "Write SET_POWER command failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+void quickspi_handle_input_data(struct quickspi_device *qsdev, u32 buf_len)
+{
+ struct input_report_body_header *body_hdr;
+ struct input_report_body *input_body;
+ u8 *input_report;
+ u32 input_len;
+ int ret = 0;
+
+ input_body = (struct input_report_body *)qsdev->input_buf;
+ body_hdr = &input_body->body_hdr;
+ input_len = le16_to_cpu(body_hdr->content_len);
+
+ if (HIDSPI_INPUT_BODY_SIZE(input_len) > buf_len) {
+ dev_err_once(qsdev->dev, "Wrong input report length: %u",
+ input_len);
+ return;
+ }
+
+ switch (body_hdr->input_report_type) {
+ case REPORT_DESCRIPTOR_RESPONSE:
+ if (input_len != le16_to_cpu(qsdev->dev_desc.rep_desc_len)) {
+ dev_err_once(qsdev->dev, "Unexpected report descriptor length: %u\n",
+ input_len);
+ return;
+ }
+
+ memcpy(qsdev->report_descriptor, input_body->content, input_len);
+
+ qsdev->report_desc_got = true;
+ wake_up_interruptible(&qsdev->report_desc_got_wq);
+
+ break;
+
+ case COMMAND_RESPONSE:
+ if (body_hdr->content_id == HIDSPI_SET_POWER_CMD_ID) {
+ dev_dbg(qsdev->dev, "Receive set power on response\n");
+ } else {
+ dev_err_once(qsdev->dev, "Unknown command response type: %u\n",
+ body_hdr->content_id);
+ }
+
+ break;
+
+ case RESET_RESPONSE:
+ dev_dbg(qsdev->dev, "Receive DIR reset response\n");
+ /* TODO: to add device initiated reset flow */
+ break;
+
+ case GET_FEATURE_RESPONSE:
+ case GET_INPUT_REPORT_RESPONSE:
+ qsdev->report_len = sizeof(body_hdr->content_id) + input_len;
+ input_report = input_body->content - sizeof(body_hdr->content_id);
+
+ memcpy(qsdev->report_buf, input_report, qsdev->report_len);
+
+ qsdev->get_report_cmpl = true;
+ wake_up_interruptible(&qsdev->get_report_cmpl_wq);
+
+ break;
+
+ case SET_FEATURE_RESPONSE:
+ case OUTPUT_REPORT_RESPONSE:
+ qsdev->set_report_cmpl = true;
+ wake_up_interruptible(&qsdev->set_report_cmpl_wq);
+
+ break;
+
+ case DATA:
+ if (input_len > le16_to_cpu(qsdev->dev_desc.max_input_len)) {
+ dev_err_once(qsdev->dev, "Unexpected too large input report length: %u\n",
+ input_len);
+ return;
+ }
+
+ input_len = sizeof(body_hdr->content_id) + input_len;
+ input_report = input_body->content - sizeof(body_hdr->content_id);
+
+ ret = quickspi_hid_send_report(qsdev, input_report, input_len);
+ if (ret)
+ dev_err_once(qsdev->dev, "Failed to send HID input report: %d\n", ret);
+
+ break;
+
+ default:
+ dev_err_once(qsdev->dev, "Unsupported input report type: %u\n",
+ body_hdr->input_report_type);
+ break;
+ }
+}
+
+static int acpi_tic_reset(struct quickspi_device *qsdev)
+{
+ acpi_status status = 0;
+ acpi_handle handle;
+
+ if (!qsdev->acpi_dev)
+ return -ENODEV;
+
+ handle = acpi_device_handle(qsdev->acpi_dev);
+ status = acpi_execute_simple_method(handle, "_RST", 0);
+ if (ACPI_FAILURE(status)) {
+ dev_err_once(qsdev->dev,
+ "Failed to reset device through ACPI method, ret = %d\n", status);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int reset_tic(struct quickspi_device *qsdev)
+{
+ u32 actual_read_len, read_len = 0;
+ u32 input_report_len, reset_response, int_cause_val;
+ u8 input_rep_type;
+ int ret;
+
+ qsdev->state = QUICKSPI_RESETING;
+
+ qsdev->reset_ack = false;
+
+ /* First interrupt uses level trigger to avoid missing interrupt */
+ thc_int_trigger_type_select(qsdev->thc_hw, false);
+
+ ret = thc_interrupt_quiesce(qsdev->thc_hw, true);
+ if (ret)
+ return ret;
+
+ ret = acpi_tic_reset(qsdev);
+ if (ret)
+ return ret;
+
+ ret = thc_interrupt_quiesce(qsdev->thc_hw, false);
+ if (ret)
+ return ret;
+
+ ret = wait_event_interruptible_timeout(qsdev->reset_ack_wq,
+ qsdev->reset_ack,
+ QUICKSPI_ACK_WAIT_TIMEOUT * HZ);
+ if (ret <= 0 || !qsdev->reset_ack) {
+ dev_err_once(qsdev->dev, "Wait RESET_RESPONSE timeout, ret:%d\n", ret);
+ return -ETIMEDOUT;
+ }
+
+ int_cause_val = thc_int_cause_read(qsdev->thc_hw);
+ input_report_len = FIELD_GET(HIDSPI_INPUT_HEADER_REPORT_LEN, int_cause_val);
+
+ read_len = input_report_len * sizeof(u32);
+ if (read_len != HIDSPI_INPUT_BODY_SIZE(0)) {
+ dev_err_once(qsdev->dev, "Receive wrong RESET_RESPONSE, len = %u\n",
+ read_len);
+ return -EINVAL;
+ }
+
+ /* Switch to edge trigger matching with HIDSPI protocol definition */
+ thc_int_trigger_type_select(qsdev->thc_hw, true);
+
+ ret = thc_tic_pio_read(qsdev->thc_hw, qsdev->input_report_bdy_addr,
+ read_len, &actual_read_len,
+ (u32 *)&reset_response);
+ if (ret || actual_read_len != read_len) {
+ dev_err_once(qsdev->dev, "Read RESET_RESPONSE body failed, ret = %d\n", ret);
+ dev_err_once(qsdev->dev, "RESET_RESPONSE body expected len = %u, actual = %u\n",
+ read_len, actual_read_len);
+ return ret;
+ }
+
+ input_rep_type = FIELD_GET(HIDSPI_IN_REP_BDY_HDR_REP_TYPE, reset_response);
+
+ if (input_rep_type == RESET_RESPONSE) {
+ dev_dbg(qsdev->dev, "RESET_RESPONSE received\n");
+ } else {
+ dev_err_once(qsdev->dev,
+ "Unexpected input report type: %d, expect RESET_RESPONSE\n",
+ input_rep_type);
+ return -EINVAL;
+ }
+
+ qsdev->state = QUICKSPI_RESETED;
+
+ ret = quickspi_get_device_descriptor(qsdev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+int quickspi_get_report(struct quickspi_device *qsdev,
+ u8 report_type, unsigned int report_id, void *buf)
+{
+ int rep_type;
+ int ret;
+
+ if (report_type == HID_INPUT_REPORT) {
+ rep_type = GET_INPUT_REPORT;
+ } else if (report_type == HID_FEATURE_REPORT) {
+ rep_type = GET_FEATURE;
+ } else {
+ dev_err_once(qsdev->dev, "Unsupported report type for GET REPORT: %d\n",
+ report_type);
+ return -EINVAL;
+ }
+
+ ret = write_cmd_to_txdma(qsdev, rep_type, report_id, NULL, 0);
+ if (ret) {
+ dev_err_once(qsdev->dev, "Write GET_REPORT command failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = wait_event_interruptible_timeout(qsdev->get_report_cmpl_wq,
+ qsdev->get_report_cmpl,
+ QUICKSPI_ACK_WAIT_TIMEOUT * HZ);
+ if (ret <= 0 || !qsdev->get_report_cmpl) {
+ dev_err_once(qsdev->dev, "Wait Get Report Response timeout, ret:%d\n", ret);
+ return -ETIMEDOUT;
+ }
+ qsdev->get_report_cmpl = false;
+
+ memcpy(buf, qsdev->report_buf, qsdev->report_len);
+
+ return qsdev->report_len;
+}
+
+int quickspi_set_report(struct quickspi_device *qsdev,
+ u8 report_type, unsigned int report_id,
+ void *buf, u32 buf_len)
+{
+ int rep_type;
+ int ret;
+
+ if (report_type == HID_OUTPUT_REPORT) {
+ rep_type = OUTPUT_REPORT;
+ } else if (report_type == HID_FEATURE_REPORT) {
+ rep_type = SET_FEATURE;
+ } else {
+ dev_err_once(qsdev->dev, "Unsupported report type for SET REPORT: %d\n",
+ report_type);
+ return -EINVAL;
+ }
+
+ ret = write_cmd_to_txdma(qsdev, rep_type, report_id, buf + 1, buf_len - 1);
+ if (ret) {
+ dev_err_once(qsdev->dev, "Write SET_REPORT command failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = wait_event_interruptible_timeout(qsdev->set_report_cmpl_wq,
+ qsdev->set_report_cmpl,
+ QUICKSPI_ACK_WAIT_TIMEOUT * HZ);
+ if (ret <= 0 || !qsdev->set_report_cmpl) {
+ dev_err_once(qsdev->dev, "Wait Set Report Response timeout, ret:%d\n", ret);
+ return -ETIMEDOUT;
+ }
+ qsdev->set_report_cmpl = false;
+
+ return buf_len;
+}
new file mode 100644
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2024 Intel Corporation */
+
+#ifndef _QUICKSPI_PROTOCOL_H_
+#define _QUICKSPI_PROTOCOL_H_
+
+#include <linux/hid-over-spi.h>
+
+#define QUICKSPI_ACK_WAIT_TIMEOUT 5
+
+struct quickspi_device;
+
+void quickspi_handle_input_data(struct quickspi_device *qsdev, u32 buf_len);
+int quickspi_get_report(struct quickspi_device *qsdev, u8 report_type,
+ unsigned int report_id, void *buf);
+int quickspi_set_report(struct quickspi_device *qsdev, u8 report_type,
+ unsigned int report_id, void *buf, u32 buf_len);
+int quickspi_get_report_descriptor(struct quickspi_device *qsdev);
+
+int quickspi_set_power(struct quickspi_device *qsdev,
+ enum hidspi_power_state power_state);
+
+int reset_tic(struct quickspi_device *qsdev);
+
+#endif /* _QUICKSPI_PROTOCOL_H_ */
@@ -4,6 +4,120 @@
#ifndef _HID_OVER_SPI_H_
#define _HID_OVER_SPI_H_
+#include <linux/bits.h>
+#include <linux/types.h>
+
+/* Input report type definition in HIDSPI protocol */
+enum input_report_type {
+ INVALID_INPUT_REPORT_TYPE_0 = 0,
+ DATA = 1,
+ INVALID_TYPE_2 = 2,
+ RESET_RESPONSE = 3,
+ COMMAND_RESPONSE = 4,
+ GET_FEATURE_RESPONSE = 5,
+ INVALID_TYPE_6 = 6,
+ DEVICE_DESCRIPTOR_RESPONSE = 7,
+ REPORT_DESCRIPTOR_RESPONSE = 8,
+ SET_FEATURE_RESPONSE = 9,
+ OUTPUT_REPORT_RESPONSE = 10,
+ GET_INPUT_REPORT_RESPONSE = 11,
+ INVALID_INPUT_REPORT_TYPE = 0xF,
+};
+
+/* Output report type definition in HIDSPI protocol */
+enum output_report_type {
+ INVALID_OUTPUT_REPORT_TYPE_0 = 0,
+ DEVICE_DESCRIPTOR = 1,
+ REPORT_DESCRIPTOR = 2,
+ SET_FEATURE = 3,
+ GET_FEATURE = 4,
+ OUTPUT_REPORT = 5,
+ GET_INPUT_REPORT = 6,
+ COMMAND_CONTENT = 7,
+};
+
+/* Set power command ID for output report */
+#define HIDSPI_SET_POWER_CMD_ID 1
+
+/* Power state definition in HIDSPI protocol */
+enum hidspi_power_state {
+ HIDSPI_ON = 1,
+ HIDSPI_SLEEP = 2,
+ HIDSPI_OFF = 3,
+};
+
+/**
+ * Input report header definition in HIDSPI protocol
+ * Report header size is 32bits, it includes:
+ * protocol_ver: [0:3] Current supported HIDSPI protocol version, must be 0x3
+ * reserved0: [4:7] Reserved bits
+ * input_report_len: [8:21] Input report length in number bytes divided by 4
+ * last_frag_flag: [22]Indicate if this packet is last fragment.
+ * 1 - indicates last fragment
+ * 0 - indicates additional fragments
+ * reserved1: [23] Reserved bits
+ * @sync_const: [24:31] Used to validate input report header, must be 0x5A
+ */
+#define HIDSPI_INPUT_HEADER_SIZE sizeof(u32)
+#define HIDSPI_INPUT_HEADER_VER GENMASK(3, 0)
+#define HIDSPI_INPUT_HEADER_REPORT_LEN GENMASK(21, 8)
+#define HIDSPI_INPUT_HEADER_LAST_FLAG BIT(22)
+#define HIDSPI_INPUT_HEADER_SYNC GENMASK(31, 24)
+
+/**
+ * struct input_report_body_header - Input report body header definition in HIDSPI protocol
+ * @input_report_type: indicate input report type, reference to enum input_report_type
+ * @content_len: this input report body packet length
+ * @content_id: indicate this input report's report id
+ */
+struct input_report_body_header {
+ u8 input_report_type;
+ __le16 content_len;
+ u8 content_id;
+} __packed;
+
+#define HIDSPI_INPUT_BODY_HEADER_SIZE sizeof(struct input_report_body_header)
+
+/**
+ * struct input_report_body - Input report body definition in HIDSPI protocol
+ * @body_hdr: input report body header
+ * @content: input report body content
+ */
+struct input_report_body {
+ struct input_report_body_header body_hdr;
+ u8 content[];
+} __packed;
+
+#define HIDSPI_INPUT_BODY_SIZE(content_len) ((content_len) + HIDSPI_INPUT_BODY_HEADER_SIZE)
+
+/**
+ * struct output_report_header - Output report header definition in HIDSPI protocol
+ * @report_type: output report type, reference to enum output_report_type
+ * @content_len: length of content
+ * @content_id: 0x00 - descriptors
+ * report id - Set/Feature feature or Input/Output Reports
+ * command opcode - for commands
+ */
+struct output_report_header {
+ u8 report_type;
+ __le16 content_len;
+ u8 content_id;
+} __packed;
+
+#define HIDSPI_OUTPUT_REPORT_HEADER_SIZE sizeof(struct output_report_header)
+
+/**
+ * struct output_report - Output report definition in HIDSPI protocol
+ * @output_hdr: output report header
+ * @content: output report content
+ */
+struct output_report {
+ struct output_report_header output_hdr;
+ u8 content[];
+} __packed;
+
+#define HIDSPI_OUTPUT_REPORT_SIZE(content_len) ((content_len) + HIDSPI_OUTPUT_REPORT_HEADER_SIZE)
+
/**
* struct hidspi_dev_descriptor - HIDSPI device descriptor definition
* @dev_desc_len: The length of the complete device descriptor, fixed to 0x18 (24).
@@ -34,4 +148,8 @@ struct hidspi_dev_descriptor {
__le32 reserved;
};
+#define HIDSPI_DEVICE_DESCRIPTOR_SIZE sizeof(struct hidspi_dev_descriptor)
+#define HIDSPI_INPUT_DEVICE_DESCRIPTOR_SIZE \
+ (HIDSPI_INPUT_BODY_HEADER_SIZE + HIDSPI_DEVICE_DESCRIPTOR_SIZE)
+
#endif /* _HID_OVER_SPI_H_ */