HID: intel-thc-hid: intel-quickspi: Add HIDSPI protocol implementation

Intel QuickSPI driver uses THC hardware to accelerate HID over SPI
(HIDSPI) protocol flow.

This patch implements all data flows described in HID over SPI protocol
SPEC by using THC hardware layer APIs.

HID over SPI SPEC:
https://www.microsoft.com/download/details.aspx?id=103325

Co-developed-by: Xinpeng Sun <xinpeng.sun@intel.com>
Signed-off-by: Xinpeng Sun <xinpeng.sun@intel.com>
Signed-off-by: Even Xu <even.xu@intel.com>
Tested-by: Rui Zhang <rui1.zhang@intel.com>
Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Tested-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: Evenxf

drivers/hid/intel-thc-hid/Makefile

@@ -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

drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h

@@ -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 descriptor
+ * @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_ */

drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c

@@ -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)