diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 08446c89eff6e44118c8800943494ecd73d69f06..f8a56d6312425a2e4f2c466cfed43d2affdbea59 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -404,6 +404,12 @@ config HID_VIVALDI_COMMON
option so that drivers can use common code to parse the HID
descriptors for vivaldi function row keymap.
+config HID_GOODIX_SPI
+ tristate "Goodix GT7986U SPI HID touchscreen"
+ depends on SPI_MASTER
+ help
+ Support for Goodix GT7986U SPI HID touchscreen device.
+
config HID_GOOGLE_HAMMER
tristate "Google Hammer Keyboard"
select HID_VIVALDI_COMMON
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index e40f1ddebbb713d1adc854af06f5317c379c29f0..496dab54c73a826489da590e458e56e7c5d73be2 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_HID_GEMBIRD) += hid-gembird.o
obj-$(CONFIG_HID_GFRM) += hid-gfrm.o
obj-$(CONFIG_HID_GLORIOUS) += hid-glorious.o
obj-$(CONFIG_HID_VIVALDI_COMMON) += hid-vivaldi-common.o
+obj-$(CONFIG_HID_GOODIX_SPI) += hid-goodix-spi.o
obj-$(CONFIG_HID_GOOGLE_HAMMER) += hid-google-hammer.o
obj-$(CONFIG_HID_GOOGLE_STADIA_FF) += hid-google-stadiaff.o
obj-$(CONFIG_HID_VIVALDI) += hid-vivaldi.o
diff --git a/drivers/hid/hid-goodix-spi.c b/drivers/hid/hid-goodix-spi.c
new file mode 100644
index 0000000000000000000000000000000000000000..5103bf0aada4bd23fac1241a040ded71da63486e
--- /dev/null
+++ b/drivers/hid/hid-goodix-spi.c
@@ -0,0 +1,810 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Goodix GT7986U SPI Driver Code for HID.
+ *
+ * Copyright (C) 2024 Godix, Inc.
+ */
+#include <asm/unaligned.h>
+#include <linux/delay.h>
+#include <linux/hid.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/sizes.h>
+#include <linux/spi/spi.h>
+
+#define GOODIX_DEV_CONFIRM_ADDR 0x10000
+#define GOODIX_HID_DESC_ADDR 0x1058C
+#define GOODIX_HID_REPORT_DESC_ADDR 0x105AA
+#define GOODIX_HID_SIGN_ADDR 0x10D32
+
+#define GOODIX_HID_GET_REPORT_CMD 0x02
+#define GOODIX_HID_SET_REPORT_CMD 0x03
+
+#define GOODIX_HID_MAX_INBUF_SIZE 128
+#define GOODIX_HID_ACK_READY_FLAG 0x01
+#define GOODIX_HID_REPORT_READY_FLAG 0x80
+
+#define GOODIX_DEV_CONFIRM_VAL 0xAA
+
+#define GOODIX_SPI_WRITE_FLAG 0xF0
+#define GOODIX_SPI_READ_FLAG 0xF1
+#define GOODIX_SPI_TRANS_PREFIX_LEN 1
+#define GOODIX_REGISTER_WIDTH 4
+#define GOODIX_SPI_READ_DUMMY_LEN 3
+#define GOODIX_SPI_READ_PREFIX_LEN (GOODIX_SPI_TRANS_PREFIX_LEN + \
+ GOODIX_REGISTER_WIDTH + \
+ GOODIX_SPI_READ_DUMMY_LEN)
+#define GOODIX_SPI_WRITE_PREFIX_LEN (GOODIX_SPI_TRANS_PREFIX_LEN + \
+ GOODIX_REGISTER_WIDTH)
+
+#define GOODIX_CHECKSUM_SIZE sizeof(u16)
+#define GOODIX_NORMAL_RESET_DELAY_MS 150
+
+struct goodix_hid_report_header {
+ u8 flag;
+ __le16 size;
+} __packed;
+#define GOODIX_HID_ACK_HEADER_SIZE sizeof(struct goodix_hid_report_header)
+
+struct goodix_hid_report_package {
+ __le16 size;
+ u8 data[];
+};
+
+#define GOODIX_HID_PKG_LEN_SIZE sizeof(u16)
+#define GOODIX_HID_COOR_DATA_LEN 82
+#define GOODIX_HID_COOR_PKG_LEN (GOODIX_HID_PKG_LEN_SIZE + \
+ GOODIX_HID_COOR_DATA_LEN)
+
+/* power state */
+#define GOODIX_SPI_POWER_ON 0x00
+#define GOODIX_SPI_POWER_SLEEP 0x01
+
+/* flags used to record the current device operating state */
+#define GOODIX_HID_STARTED 0
+
+struct goodix_hid_report_event {
+ struct goodix_hid_report_header hdr;
+ u8 data[GOODIX_HID_COOR_PKG_LEN];
+} __packed;
+
+struct goodix_hid_desc {
+ __le16 desc_length;
+ __le16 bcd_version;
+ __le16 report_desc_length;
+ __le16 report_desc_register;
+ __le16 input_register;
+ __le16 max_input_length;
+ __le16 output_register;
+ __le16 max_output_length;
+ __le16 cmd_register;
+ __le16 data_register;
+ __le16 vendor_id;
+ __le16 product_id;
+ __le16 version_id;
+ __le32 reserved;
+} __packed;
+
+struct goodix_ts_data {
+ struct device *dev;
+ struct spi_device *spi;
+ struct hid_device *hid;
+ struct goodix_hid_desc hid_desc;
+
+ struct gpio_desc *reset_gpio;
+ u32 hid_report_addr;
+
+ unsigned long flags;
+ /* lock for hid raw request operation */
+ struct mutex hid_request_lock;
+ /* buffer used to store hid report event */
+ u8 *event_buf;
+ u32 hid_max_event_sz;
+ /* buffer used to do spi data transfer */
+ u8 xfer_buf[SZ_2K] ____cacheline_aligned;
+};
+
+static void *goodix_get_event_report(struct goodix_ts_data *ts, u32 addr,
+ u8 *data, size_t len)
+{
+ struct spi_device *spi = to_spi_device(&ts->spi->dev);
+ struct spi_transfer xfers;
+ struct spi_message spi_msg;
+ int error;
+
+ /* buffer format: 0xF1 + addr(4bytes) + dummy(3bytes) + data */
+ data[0] = GOODIX_SPI_READ_FLAG;
+ put_unaligned_be32(addr, data + GOODIX_SPI_TRANS_PREFIX_LEN);
+
+ spi_message_init(&spi_msg);
+ memset(&xfers, 0, sizeof(xfers));
+ xfers.tx_buf = data;
+ xfers.rx_buf = data;
+ xfers.len = GOODIX_SPI_READ_PREFIX_LEN + len;
+ spi_message_add_tail(&xfers, &spi_msg);
+
+ error = spi_sync(spi, &spi_msg);
+ if (error) {
+ dev_err(ts->dev, "spi transfer error: %d", error);
+ return NULL;
+ }
+
+ return data + GOODIX_SPI_READ_PREFIX_LEN;
+}
+
+static int goodix_spi_read(struct goodix_ts_data *ts, u32 addr,
+ void *data, size_t len)
+{
+ struct spi_device *spi = to_spi_device(&ts->spi->dev);
+ struct spi_transfer xfers;
+ struct spi_message spi_msg;
+ int error;
+
+ if (GOODIX_SPI_READ_PREFIX_LEN + len > sizeof(ts->xfer_buf)) {
+ dev_err(ts->dev, "read data len exceed limit %zu",
+ sizeof(ts->xfer_buf) - GOODIX_SPI_READ_PREFIX_LEN);
+ return -EINVAL;
+ }
+
+ /* buffer format: 0xF1 + addr(4bytes) + dummy(3bytes) + data */
+ ts->xfer_buf[0] = GOODIX_SPI_READ_FLAG;
+ put_unaligned_be32(addr, ts->xfer_buf + GOODIX_SPI_TRANS_PREFIX_LEN);
+
+ spi_message_init(&spi_msg);
+ memset(&xfers, 0, sizeof(xfers));
+ xfers.tx_buf = ts->xfer_buf;
+ xfers.rx_buf = ts->xfer_buf;
+ xfers.len = GOODIX_SPI_READ_PREFIX_LEN + len;
+ spi_message_add_tail(&xfers, &spi_msg);
+
+ error = spi_sync(spi, &spi_msg);
+ if (error)
+ dev_err(ts->dev, "spi transfer error: %d", error);
+ else
+ memcpy(data, ts->xfer_buf + GOODIX_SPI_READ_PREFIX_LEN, len);
+
+ return error;
+}
+
+static int goodix_spi_write(struct goodix_ts_data *ts, u32 addr,
+ const void *data, size_t len)
+{
+ struct spi_device *spi = to_spi_device(&ts->spi->dev);
+ struct spi_transfer xfers;
+ struct spi_message spi_msg;
+ int error;
+
+ if (GOODIX_SPI_WRITE_PREFIX_LEN + len > sizeof(ts->xfer_buf)) {
+ dev_err(ts->dev, "write data len exceed limit %zu",
+ sizeof(ts->xfer_buf) - GOODIX_SPI_WRITE_PREFIX_LEN);
+ return -EINVAL;
+ }
+
+ /* buffer format: 0xF0 + addr(4bytes) + data */
+ ts->xfer_buf[0] = GOODIX_SPI_WRITE_FLAG;
+ put_unaligned_be32(addr, ts->xfer_buf + GOODIX_SPI_TRANS_PREFIX_LEN);
+ memcpy(ts->xfer_buf + GOODIX_SPI_WRITE_PREFIX_LEN, data, len);
+
+ spi_message_init(&spi_msg);
+ memset(&xfers, 0, sizeof(xfers));
+ xfers.tx_buf = ts->xfer_buf;
+ xfers.len = GOODIX_SPI_WRITE_PREFIX_LEN + len;
+ spi_message_add_tail(&xfers, &spi_msg);
+
+ error = spi_sync(spi, &spi_msg);
+ if (error)
+ dev_err(ts->dev, "spi transfer error: %d", error);
+
+ return error;
+}
+
+static int goodix_dev_confirm(struct goodix_ts_data *ts)
+{
+ u8 tx_buf[8], rx_buf[8];
+ int retry = 3;
+ int error;
+
+ gpiod_set_value_cansleep(ts->reset_gpio, 0);
+ usleep_range(4000, 4100);
+
+ memset(tx_buf, GOODIX_DEV_CONFIRM_VAL, sizeof(tx_buf));
+ while (retry--) {
+ error = goodix_spi_write(ts, GOODIX_DEV_CONFIRM_ADDR,
+ tx_buf, sizeof(tx_buf));
+ if (error)
+ return error;
+
+ error = goodix_spi_read(ts, GOODIX_DEV_CONFIRM_ADDR,
+ rx_buf, sizeof(rx_buf));
+ if (error)
+ return error;
+
+ if (!memcmp(tx_buf, rx_buf, sizeof(tx_buf)))
+ return 0;
+
+ usleep_range(5000, 5100);
+ }
+
+ dev_err(ts->dev, "device confirm failed, rx_buf: %*ph", 8, rx_buf);
+ return -EINVAL;
+}
+
+/**
+ * goodix_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 goodix_hid_parse(struct hid_device *hid)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+ u16 rsize;
+ int error;
+
+ rsize = le16_to_cpu(ts->hid_desc.report_desc_length);
+ if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
+ dev_err(ts->dev, "invalid report desc size, %d", rsize);
+ return -EINVAL;
+ }
+
+ u8 *rdesc __free(kfree) = kzalloc(rsize, GFP_KERNEL);
+ if (!rdesc)
+ return -ENOMEM;
+
+ error = goodix_spi_read(ts, GOODIX_HID_REPORT_DESC_ADDR, rdesc, rsize);
+ if (error) {
+ dev_err(ts->dev, "failed get report desc, %d", error);
+ return error;
+ }
+
+ error = hid_parse_report(hid, rdesc, rsize);
+ if (error) {
+ dev_err(ts->dev, "failed parse report, %d", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static int goodix_hid_get_report_length(struct hid_report *report)
+{
+ return ((report->size - 1) >> 3) + 1 +
+ report->device->report_enum[report->type].numbered + 2;
+}
+
+static void goodix_hid_find_max_report(struct hid_device *hid, unsigned int type,
+ unsigned int *max)
+{
+ struct hid_report *report;
+ unsigned int size;
+
+ list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
+ size = goodix_hid_get_report_length(report);
+ if (*max < size)
+ *max = size;
+ }
+}
+
+static int goodix_hid_start(struct hid_device *hid)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+ unsigned int bufsize = GOODIX_HID_COOR_PKG_LEN;
+ u32 report_size;
+
+ goodix_hid_find_max_report(hid, HID_INPUT_REPORT, &bufsize);
+ goodix_hid_find_max_report(hid, HID_OUTPUT_REPORT, &bufsize);
+ goodix_hid_find_max_report(hid, HID_FEATURE_REPORT, &bufsize);
+
+ report_size = GOODIX_SPI_READ_PREFIX_LEN +
+ GOODIX_HID_ACK_HEADER_SIZE + bufsize;
+ if (report_size <= ts->hid_max_event_sz)
+ return 0;
+
+ ts->event_buf = devm_krealloc(ts->dev, ts->event_buf,
+ report_size, GFP_KERNEL);
+ if (!ts->event_buf)
+ return -ENOMEM;
+
+ ts->hid_max_event_sz = report_size;
+ return 0;
+}
+
+static void goodix_hid_stop(struct hid_device *hid)
+{
+ hid->claimed = 0;
+}
+
+static int goodix_hid_open(struct hid_device *hid)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+
+ set_bit(GOODIX_HID_STARTED, &ts->flags);
+ return 0;
+}
+
+static void goodix_hid_close(struct hid_device *hid)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+
+ clear_bit(GOODIX_HID_STARTED, &ts->flags);
+}
+
+/* Return date length of response data */
+static int goodix_hid_check_ack_status(struct goodix_ts_data *ts)
+{
+ struct goodix_hid_report_header hdr;
+ int retry = 20;
+ int error;
+
+ while (retry--) {
+ /*
+ * 3 bytes of hid request response data
+ * - byte 0: Ack flag, value of 1 for data ready
+ * - bytes 1-2: Response data length
+ */
+ error = goodix_spi_read(ts, ts->hid_report_addr,
+ &hdr, sizeof(hdr));
+ if (!error && (hdr.flag & GOODIX_HID_ACK_READY_FLAG))
+ return le16_to_cpu(hdr.size);
+
+ /* Wait 10ms for another try */
+ usleep_range(10000, 11000);
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * goodix_hid_get_raw_report() - Process hidraw GET REPORT operation
+ * @hid: hid device instance
+ * @reportnum: Report ID
+ * @buf: Buffer for store the report date
+ * @len: Length fo report data
+ * @report_type: Report type
+ *
+ * The function for hid_ll_driver.get_raw_report to handle the HIDRAW ioctl
+ * get report request. The transmitted data follows the standard i2c-hid
+ * protocol with a specified header.
+ *
+ * Return: The length of the data in the buf on success, negative error code
+ */
+static int goodix_hid_get_raw_report(struct hid_device *hid,
+ unsigned char reportnum,
+ u8 *buf, size_t len,
+ unsigned char report_type)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+ u16 data_register = le16_to_cpu(ts->hid_desc.data_register);
+ u16 cmd_register = le16_to_cpu(ts->hid_desc.cmd_register);
+ u8 tmp_buf[GOODIX_HID_MAX_INBUF_SIZE];
+ int tx_len = 0, args_len = 0;
+ int response_data_len;
+ u8 args[3];
+ int error;
+
+ if (report_type == HID_OUTPUT_REPORT)
+ return -EINVAL;
+
+ if (reportnum == 3) {
+ /* Get win8 signature data */
+ error = goodix_spi_read(ts, GOODIX_HID_SIGN_ADDR, buf, len);
+ if (error) {
+ dev_err(ts->dev, "failed get win8 sign: %d", error);
+ return -EINVAL;
+ }
+ return len;
+ }
+
+ if (reportnum >= 0x0F)
+ args[args_len++] = reportnum;
+
+ put_unaligned_le16(data_register, args + args_len);
+ args_len += sizeof(data_register);
+
+ /* Clean 3 bytes of hid ack header data */
+ memset(tmp_buf, 0, GOODIX_HID_ACK_HEADER_SIZE);
+ tx_len += GOODIX_HID_ACK_HEADER_SIZE;
+
+ put_unaligned_le16(cmd_register, tmp_buf + tx_len);
+ tx_len += sizeof(cmd_register);
+
+ tmp_buf[tx_len] = (report_type == HID_FEATURE_REPORT ? 0x03 : 0x01) << 4;
+ tmp_buf[tx_len] |= reportnum >= 0x0F ? 0x0F : reportnum;
+ tx_len++;
+
+ tmp_buf[tx_len++] = GOODIX_HID_GET_REPORT_CMD;
+
+ memcpy(tmp_buf + tx_len, args, args_len);
+ tx_len += args_len;
+
+ /* Step1: write report request info */
+ error = goodix_spi_write(ts, ts->hid_report_addr, tmp_buf, tx_len);
+ if (error) {
+ dev_err(ts->dev, "failed send read feature cmd, %d", error);
+ return error;
+ }
+
+ /* No need read response data */
+ if (!len)
+ return 0;
+
+ /* Step2: check response data status */
+ response_data_len = goodix_hid_check_ack_status(ts);
+ if (response_data_len <= GOODIX_HID_PKG_LEN_SIZE)
+ return -EINVAL;
+
+ len = min(len, response_data_len - GOODIX_HID_PKG_LEN_SIZE);
+ /* Step3: read response data(skip 2bytes of hid pkg length) */
+ error = goodix_spi_read(ts, ts->hid_report_addr +
+ GOODIX_HID_ACK_HEADER_SIZE +
+ GOODIX_HID_PKG_LEN_SIZE, buf, len);
+ if (error) {
+ dev_err(ts->dev, "failed read hid response data, %d", error);
+ return error;
+ }
+
+ if (buf[0] != reportnum) {
+ dev_err(ts->dev, "incorrect report (%d vs %d expected)",
+ buf[0], reportnum);
+ return -EINVAL;
+ }
+ return len;
+}
+
+/**
+ * goodix_hid_set_raw_report() - process hidraw SET REPORT operation
+ * @hid: HID device
+ * @reportnum: Report ID
+ * @buf: Buffer for communication
+ * @len: Length of data in the buffer
+ * @report_type: Report type
+ *
+ * The function for hid_ll_driver.get_raw_report to handle the HIDRAW ioctl
+ * set report request. The transmitted data follows the standard i2c-hid
+ * protocol with a specified header.
+ *
+ * Return: The length of the data sent, negative error code on failure
+ */
+static int goodix_hid_set_raw_report(struct hid_device *hid,
+ unsigned char reportnum,
+ __u8 *buf, size_t len,
+ unsigned char report_type)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+ u16 data_register = le16_to_cpu(ts->hid_desc.data_register);
+ u16 cmd_register = le16_to_cpu(ts->hid_desc.cmd_register);
+ int tx_len = 0, args_len = 0;
+ u8 tmp_buf[GOODIX_HID_MAX_INBUF_SIZE];
+ u8 args[5];
+ int error;
+
+ if (reportnum >= 0x0F) {
+ args[args_len++] = reportnum;
+ reportnum = 0x0F;
+ }
+
+ put_unaligned_le16(data_register, args + args_len);
+ args_len += sizeof(data_register);
+
+ put_unaligned_le16(GOODIX_HID_PKG_LEN_SIZE + len, args + args_len);
+ args_len += GOODIX_HID_PKG_LEN_SIZE;
+
+ /* Clean 3 bytes of hid ack header data */
+ memset(tmp_buf, 0, GOODIX_HID_ACK_HEADER_SIZE);
+ tx_len += GOODIX_HID_ACK_HEADER_SIZE;
+
+ put_unaligned_le16(cmd_register, tmp_buf + tx_len);
+ tx_len += sizeof(cmd_register);
+
+ tmp_buf[tx_len++] = ((report_type == HID_FEATURE_REPORT ? 0x03 : 0x02) << 4) | reportnum;
+ tmp_buf[tx_len++] = GOODIX_HID_SET_REPORT_CMD;
+
+ memcpy(tmp_buf + tx_len, args, args_len);
+ tx_len += args_len;
+
+ memcpy(tmp_buf + tx_len, buf, len);
+ tx_len += len;
+
+ error = goodix_spi_write(ts, ts->hid_report_addr, tmp_buf, tx_len);
+ if (error) {
+ dev_err(ts->dev, "failed send report: %*ph", tx_len, tmp_buf);
+ return error;
+ }
+ return len;
+}
+
+static int goodix_hid_raw_request(struct hid_device *hid,
+ unsigned char reportnum,
+ __u8 *buf, size_t len,
+ unsigned char rtype, int reqtype)
+{
+ struct goodix_ts_data *ts = hid->driver_data;
+ int error = -EINVAL;
+
+ guard(mutex)(&ts->hid_request_lock);
+ switch (reqtype) {
+ case HID_REQ_GET_REPORT:
+ error = goodix_hid_get_raw_report(hid, reportnum, buf,
+ len, rtype);
+ break;
+ case HID_REQ_SET_REPORT:
+ if (buf[0] == reportnum)
+ error = goodix_hid_set_raw_report(hid, reportnum,
+ buf, len, rtype);
+ break;
+ default:
+ break;
+ }
+
+ return error;
+}
+
+static struct hid_ll_driver goodix_hid_ll_driver = {
+ .parse = goodix_hid_parse,
+ .start = goodix_hid_start,
+ .stop = goodix_hid_stop,
+ .open = goodix_hid_open,
+ .close = goodix_hid_close,
+ .raw_request = goodix_hid_raw_request
+};
+
+static irqreturn_t goodix_hid_irq(int irq, void *data)
+{
+ struct goodix_ts_data *ts = data;
+ struct goodix_hid_report_event *event;
+ struct goodix_hid_report_package *pkg;
+ u16 report_size;
+
+ if (!test_bit(GOODIX_HID_STARTED, &ts->flags))
+ return IRQ_HANDLED;
+ /*
+ * First, read buffer with space for header and coordinate package:
+ * - event header = 3 bytes
+ * - coordinate event = GOODIX_HID_COOR_PKG_LEN bytes
+ *
+ * If the data size info in the event header exceeds
+ * GOODIX_HID_COOR_PKG_LEN, it means that there are other packages
+ * besides the coordinate package.
+ */
+ event = goodix_get_event_report(ts, ts->hid_report_addr, ts->event_buf,
+ GOODIX_HID_ACK_HEADER_SIZE +
+ GOODIX_HID_COOR_PKG_LEN);
+ if (!event) {
+ dev_err(ts->dev, "failed get coordinate data");
+ return IRQ_HANDLED;
+ }
+
+ /* Check coordinate data valid falg */
+ if (event->hdr.flag != GOODIX_HID_REPORT_READY_FLAG)
+ return IRQ_HANDLED;
+
+ pkg = (struct goodix_hid_report_package *)event->data;
+ if (le16_to_cpu(pkg->size) < GOODIX_HID_PKG_LEN_SIZE) {
+ dev_err(ts->dev, "invalid coordinate event package size, %d",
+ le16_to_cpu(pkg->size));
+ return IRQ_HANDLED;
+ }
+ hid_input_report(ts->hid, HID_INPUT_REPORT, pkg->data,
+ le16_to_cpu(pkg->size) - GOODIX_HID_PKG_LEN_SIZE, 1);
+
+ report_size = le16_to_cpu(event->hdr.size);
+ /* Check if there are other packages */
+ if (report_size <= GOODIX_HID_COOR_PKG_LEN)
+ return IRQ_HANDLED;
+
+ if (report_size >= ts->hid_max_event_sz) {
+ dev_err(ts->dev, "package size exceed limit %d vs %d",
+ report_size, ts->hid_max_event_sz);
+ return IRQ_HANDLED;
+ }
+
+ /* Read the package behind the coordinate data */
+ pkg = goodix_get_event_report(ts, ts->hid_report_addr + sizeof(*event),
+ ts->event_buf,
+ report_size - GOODIX_HID_COOR_PKG_LEN);
+ if (!pkg) {
+ dev_err(ts->dev, "failed read attachment data content");
+ return IRQ_HANDLED;
+ }
+
+ hid_input_report(ts->hid, HID_INPUT_REPORT, pkg->data,
+ le16_to_cpu(pkg->size) - GOODIX_HID_PKG_LEN_SIZE, 1);
+
+ return IRQ_HANDLED;
+}
+
+static int goodix_hid_init(struct goodix_ts_data *ts)
+{
+ struct hid_device *hid;
+ int error;
+
+ /* Get hid descriptor */
+ error = goodix_spi_read(ts, GOODIX_HID_DESC_ADDR, &ts->hid_desc,
+ sizeof(ts->hid_desc));
+ if (error) {
+ dev_err(ts->dev, "failed get hid desc, %d", error);
+ return error;
+ }
+
+ hid = hid_allocate_device();
+ if (IS_ERR(hid))
+ return PTR_ERR(hid);
+
+ hid->driver_data = ts;
+ hid->ll_driver = &goodix_hid_ll_driver;
+ hid->bus = BUS_SPI;
+ hid->dev.parent = &ts->spi->dev;
+
+ hid->version = le16_to_cpu(ts->hid_desc.bcd_version);
+ hid->vendor = le16_to_cpu(ts->hid_desc.vendor_id);
+ hid->product = le16_to_cpu(ts->hid_desc.product_id);
+ snprintf(hid->name, sizeof(hid->name), "%s %04X:%04X", "hid-gdix",
+ hid->vendor, hid->product);
+
+ error = hid_add_device(hid);
+ if (error) {
+ dev_err(ts->dev, "failed add hid device, %d", error);
+ hid_destroy_device(hid);
+ return error;
+ }
+
+ ts->hid = hid;
+ return 0;
+}
+
+static int goodix_spi_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct goodix_ts_data *ts;
+ int error;
+
+ /* init spi_device */
+ spi->mode = SPI_MODE_0;
+ spi->bits_per_word = 8;
+ error = spi_setup(spi);
+ if (error)
+ return error;
+
+ ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ mutex_init(&ts->hid_request_lock);
+ spi_set_drvdata(spi, ts);
+ ts->spi = spi;
+ ts->dev = dev;
+ ts->hid_max_event_sz = GOODIX_SPI_READ_PREFIX_LEN +
+ GOODIX_HID_ACK_HEADER_SIZE + GOODIX_HID_COOR_PKG_LEN;
+ ts->event_buf = devm_kmalloc(dev, ts->hid_max_event_sz, GFP_KERNEL);
+ if (!ts->event_buf)
+ return -ENOMEM;
+
+ ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ts->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(ts->reset_gpio),
+ "failed to request reset gpio\n");
+
+ error = device_property_read_u32(dev, "goodix,hid-report-addr",
+ &ts->hid_report_addr);
+ if (error)
+ return dev_err_probe(dev, error,
+ "failed get hid report addr\n");
+
+ error = goodix_dev_confirm(ts);
+ if (error)
+ return error;
+
+ /* Waits 150ms for firmware to fully boot */
+ msleep(GOODIX_NORMAL_RESET_DELAY_MS);
+
+ error = goodix_hid_init(ts);
+ if (error) {
+ dev_err(dev, "failed init hid device");
+ return error;
+ }
+
+ error = devm_request_threaded_irq(&ts->spi->dev, ts->spi->irq,
+ NULL, goodix_hid_irq, IRQF_ONESHOT,
+ "goodix_spi_hid", ts);
+ if (error) {
+ dev_err(ts->dev, "could not register interrupt, irq = %d, %d",
+ ts->spi->irq, error);
+ goto err_destroy_hid;
+ }
+
+ return 0;
+
+err_destroy_hid:
+ hid_destroy_device(ts->hid);
+ return error;
+}
+
+static void goodix_spi_remove(struct spi_device *spi)
+{
+ struct goodix_ts_data *ts = spi_get_drvdata(spi);
+
+ disable_irq(spi->irq);
+ hid_destroy_device(ts->hid);
+}
+
+static int goodix_spi_set_power(struct goodix_ts_data *ts, int power_state)
+{
+ u8 power_control_cmd[] = {0x00, 0x00, 0x00, 0x87, 0x02, 0x00, 0x08};
+ int error;
+
+ /* value 0 for power on, 1 for power sleep */
+ power_control_cmd[5] = power_state;
+
+ guard(mutex)(&ts->hid_request_lock);
+ error = goodix_spi_write(ts, ts->hid_report_addr, power_control_cmd,
+ sizeof(power_control_cmd));
+ if (error) {
+ dev_err(ts->dev, "failed set power mode: %s",
+ power_state == GOODIX_SPI_POWER_ON ? "on" : "sleep");
+ return error;
+ }
+ return 0;
+}
+
+static int goodix_spi_suspend(struct device *dev)
+{
+ struct goodix_ts_data *ts = dev_get_drvdata(dev);
+
+ disable_irq(ts->spi->irq);
+ return goodix_spi_set_power(ts, GOODIX_SPI_POWER_SLEEP);
+}
+
+static int goodix_spi_resume(struct device *dev)
+{
+ struct goodix_ts_data *ts = dev_get_drvdata(dev);
+
+ enable_irq(ts->spi->irq);
+ return goodix_spi_set_power(ts, GOODIX_SPI_POWER_ON);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(goodix_spi_pm_ops,
+ goodix_spi_suspend, goodix_spi_resume);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id goodix_spi_acpi_match[] = {
+ { "GXTS7986" },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, goodix_spi_acpi_match);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id goodix_spi_of_match[] = {
+ { .compatible = "goodix,gt7986u", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, goodix_spi_of_match);
+#endif
+
+static const struct spi_device_id goodix_spi_ids[] = {
+ { "gt7986u" },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, goodix_spi_ids);
+
+static struct spi_driver goodix_spi_driver = {
+ .driver = {
+ .name = "goodix-spi-hid",
+ .acpi_match_table = ACPI_PTR(goodix_spi_acpi_match),
+ .of_match_table = of_match_ptr(goodix_spi_of_match),
+ .pm = pm_sleep_ptr(&goodix_spi_pm_ops),
+ },
+ .probe = goodix_spi_probe,
+ .remove = goodix_spi_remove,
+ .id_table = goodix_spi_ids,
+};
+module_spi_driver(goodix_spi_driver);
+
+MODULE_DESCRIPTION("Goodix SPI driver for HID touchscreen");
+MODULE_AUTHOR("Goodix, Inc.");
+MODULE_LICENSE("GPL");