279 lines
7.9 KiB
C
279 lines
7.9 KiB
C
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/*
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* SiI8620 Linux Driver eMSC HID stuff
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Copyright (C) 2013-2014 Silicon Image, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation version 2.
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This program is distributed AS-IS WITHOUT ANY WARRANTY of any
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kind, whether express or implied; INCLUDING without the implied warranty
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of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE or NON-INFRINGEMENT.
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See the GNU General Public License for more details at
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http://www.gnu.org/licenses/gpl-2.0.html.
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*/
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/*
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@file si_emsc_hid.h
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*/
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#ifndef _SI_EMSC_HID_H_
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#define _SI_EMSC_HID_H_
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#include <linux/mod_devicetable.h>
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#include <linux/hid.h>
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#include "si_fw_macros.h"
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#include "si_app_devcap.h"
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#include "si_infoframe.h"
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#include "si_edid.h"
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#include "si_mhl_defs.h"
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#include "si_mhl2_edid_3d_api.h"
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#include "si_8620_internal_api.h"
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#include "si_mhl_tx_hw_drv_api.h"
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#include "platform.h"
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extern int debug_level;
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#define MHL3_HID_DBG_ERR(...) \
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MHL_TX_GENERIC_DBG_PRINT(DBG_MSG_LEVEL_ERR, __VA_ARGS__)
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#define MHL3_HID_DBG_WARN(...) \
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MHL_TX_GENERIC_DBG_PRINT(DBG_MSG_LEVEL_WARN, __VA_ARGS__)
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#define MHL3_HID_DBG_INFO(...) \
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MHL_TX_GENERIC_DBG_PRINT(DBG_MSG_LEVEL_INFO, __VA_ARGS__)
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/* mhl3_hid_data.flags */
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#define MHL3_HID_STARTED (1 << 0)
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#define MHL3_HID_CONNECTED (1 << 1)
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#define HID_FLAGS_WQ_ACTIVE (1 << 2)
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#define HID_FLAGS_WQ_CANCEL (1 << 3)
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#define MHL3_HID_PWR_ON 0x00
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#define MHL3_HID_PWR_SLEEP 0x01
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#define MHL3_HID_MAX_DESC_STR_LEN 256
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#define MAX_HID_MESSAGE_CHANNELS 16
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/* TODO: Start
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* The following belongs in the kernel mod_devicetable.h file, along
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* with updating the scripts/mod/file2alias.c file to match
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*/
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#define MHL3_NAME_SIZE 20
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#define MHL3_MODULE_PREFIX "mhl3:"
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struct mhl3_device_id {
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char name[MHL3_NAME_SIZE];
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kernel_ulong_t driver_data; /* Data private to the driver */
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};
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/* TODO: End */
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#define HID_BURST_ID_LEN (2 + 1)
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#define HID_MSG_HEADER_LEN 2
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#define HID_MSG_CHKSUM_LEN 2
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#define HID_FRAG_HEADER_LEN 1
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#define HID_ACK_PACKET_LEN 2
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#define HID_FRAG_LEN_MAX (EMSC_BLK_MAX_LENGTH - \
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(EMSC_BLK_STD_HDR_LEN + \
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HID_BURST_ID_LEN + \
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HID_FRAG_HEADER_LEN))
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#define HID_FRAG_HB0_TYPE 0x80
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#define HID_FRAG_HB0_TYPE_ACK 0x80
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#define HID_FRAG_HB0_CNT_MSK 0x7F
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#define HID_HB0_DEV_ID_MSK 0xF0
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#define HID_HB0_ACHID_MSK 0x01
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#define HID_ACHID_INT 0x01
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#define EMSC_HID_HB1_ACK 0x80
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#define EMSC_HID_HB1_MSG_CNT_FLD 0x7F
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/* HID tunneling message IDs */
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#define MHL3_HID_ACK 0x00
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#define MHL3_REPORT 0x01
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#define MHL3_GET_REPORT_DSCRPT 0x02
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#define MHL3_REPORT_DSCRPT 0x03
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#define MHL3_GET_MHID_DSCRPT 0x04
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#define MHL3_MHID_DSCRPT 0x05
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#define MHL3_GET_REPORT 0x06
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#define MHL3_SET_REPORT 0x07
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#define MHL3_DSCRPT_UPDATE 0x08
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/* HID_ACK values */
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#define HID_ACK_SUCCESS 0x00
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#define HID_ACK_NODEV 0x01
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#define HID_ACK_NODATA 0x02
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#define HID_ACK_WAIT 0x03
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#define HID_ACK_TIMEOUT 0x04
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#define HID_ACK_PROTV 0x05
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#define HID_ACK_WRTYPE 0x06
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#define HID_ACK_WRID 0x07
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#define HID_ACK_WRFMT 0x08
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#define HID_ACK_WRMFMT 0x09
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/* RHID Operand Codes */
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#define MHL_RHID_REQUEST_HOST 0x00
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#define MHL_RHID_RELINQUISH_HOST 0x01
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/* RHIDK status codes */
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#define MHL_RHID_NO_ERR 0x00
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#define MHL_RHID_INVALID 0x01
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#define MHL_RHID_DENY 0x02
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#define OP_STATE_IDLE 0x00
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#define OP_STATE_WAIT_MHID_DSCRPT 0x01
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#define OP_STATE_WAIT_REPORT_DSCRPT 0x02
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#define OP_STATE_WAIT_REPORT 0x03
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#define OP_STATE_CONNECTED 0x04
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/*
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* This structure cannot be directly loaded from the MHL3 HID
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* MHID_DSCRPT message data because the strings are variable length
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* up to 255 characters each, not the full 255 UNICODE character buffer
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* defined here. Note that the structure I derived this from in the
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* USB driver used __le16 in place of the __u16 used below.
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*/
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struct mhl3_hid_desc {
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__u8 bMHL3HIDmessageID;
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__u16 wHIDVendorID;
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__u16 wHIDProductID;
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__u8 bCountryCode;
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__u16 wBcdHID;
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__u16 bBcdDevice;
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__u8 bDeviceClass;
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__u8 bDeviceSubClass;
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__u16 wLanguageID;
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__u8 bProductNameSize;
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__u8 bManufacturerNameSize;
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__u8 bSerialNumberSize;
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} __packed;
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static DEFINE_MUTEX(mhl3_hid_open_mutex);
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struct mhl3_hid_global_data {
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/* RHID/RHIDK host-device negotiation */
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uint8_t is_host; /* 1- Successfully negotiated as host */
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uint8_t is_device; /* 1- Relinquished host role */
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uint8_t want_host; /* 1- Want the host role */
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int hid_receive_state;
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uint8_t hb0;
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uint8_t hb1;
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uint8_t in_buf[4096]; /* This buffer is shared by all
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* MHL3 HID devices. This is
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* OK because device messages
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* must be sent sequentially
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* if it is a multi-fragment
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* message so that they will
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* not get mixed up. */
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int msg_length;
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};
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struct hid_add_work_struct {
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struct work_struct work;
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struct mhl3_hid_data *mhid;
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};
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struct wq_indata_t {
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uint8_t *ptr;
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int buffer_size;
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};
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#define MAX_HID_INQUEUE 4
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/* The main HID Tunneling device structure */
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struct mhl3_hid_data {
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struct mhl_dev_context *mdev; /* MHL driver */
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struct hid_device *hid; /* pointer to HID dev */
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uint8_t *in_report_buf; /* Input report buffer. */
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int bufsize; /* Size of report buffer */
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/* MHL3 MHID_DSCRPT message in multiple parts */
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struct mhl3_hid_desc *hdesc; /* The fixed length part */
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__u8 desc_product_name[MHL3_HID_MAX_DESC_STR_LEN];
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__u8 desc_mfg_name[MHL3_HID_MAX_DESC_STR_LEN];
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__u8 desc_serial_number[MHL3_HID_MAX_DESC_STR_LEN];
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uint8_t id; /* MHL HID device ID (0-15) */
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uint8_t msg_count[2]; /* MSG_CNT for each channel */
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unsigned long flags; /* device flags */
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/* TODO: Lee - make this a constant of the correct size or
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* make this an allocated buffer.
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*/
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uint8_t report_desc[1024];/* Device report descriptor */
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uint8_t in_data[4096]; /* Contains the last HID message
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* received if it was not
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* consumed directly. */
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int in_data_length;
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uint8_t out_data[4096]; /* Holds the MHL3 HID wrapped
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* version of the HID message
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* to be sent. */
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int opState; /* Determines the type of HID
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* messages that will be
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* accepted */
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/* For deferred processing */
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struct hid_add_work_struct mhl3_work;
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struct semaphore data_wait_lock; /* Semaphore to wait for data
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* requested from the remote
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* device */
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};
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struct SI_PACK_THIS_STRUCT mhl_hid_report_msg {
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uint8_t msg_id;
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uint8_t type;
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uint8_t id; /* According to MHL spec 3.2, this
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* byte is ONLY present for numbered
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* reports, but our driver has no way
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* of determining if the reports are
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* numbered or not, so we ALWAYS
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* use it.
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*/
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uint8_t len_lo;
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uint8_t len_hi;
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uint8_t data; /* Actually the start of variable length
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* report data of length specified in
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* len_hi / len_lo
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*/
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};
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void mhl_tx_hid_host_role_request(struct mhl_dev_context *context, int request);
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void mhl_tx_hid_host_negotiation(struct mhl_dev_context *context);
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int mhl3_hid_report_desc_parse(struct mhl3_hid_data *mhid);
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void build_received_hid_message(struct mhl_dev_context *context,
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uint8_t *pmsg, int length);
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void mhl3_hid_remove_all(struct mhl_dev_context *context);
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int mhl3_mt_event(struct hid_device *hid, struct hid_field *field,
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struct hid_usage *usage, __s32 value);
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int mhl3_mt_add(struct mhl3_hid_data *mhid, struct hid_device_id *id);
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int mhl3_mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max);
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int mhl3_mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max);
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void mt_feature_mapping(struct hid_device *hdev,
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struct hid_field *field, struct hid_usage *usage);
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void dump_array(int level, char *ptitle, uint8_t *pdata, int count);
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#if (LINUX_KERNEL_VER >= 311)
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void mt_input_configured(struct hid_device *hdev, struct hid_input *hi);
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void mt_report(struct hid_device *hid, struct hid_report *report);
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#endif
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#endif /* #ifndef _SI_EMSC_HID_H_ */
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