input: maxim_sti: move header to uapi

Move kernel data structures to driver and keep the
data structures shared between kernel and user space
in the header file. Move the header to uapi to make
it accesible to user space.

Fix checkpatch errors to replace deprecated functions
and hardcoded error return values.

Change-Id: Ic3312c11ddda9f02da9807a6243206d582281995
Signed-off-by: Jing Lin <jinglin@codeaurora.org>

2 files changed, 331 insertions, 0 deletions

diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 1edbc56bfa3f..671e98bf2496 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -258,6 +258,7 @@ header-y += magic.h
 header-y += major.h
 header-y += map_to_7segment.h
 header-y += matroxfb.h
+header-y += maxim_sti.h
 header-y += mdio.h
 header-y += mdss_rotator.h
 header-y += media.h
diff --git a/include/uapi/linux/maxim_sti.h b/include/uapi/linux/maxim_sti.h
new file mode 100644
index 000000000000..77ae564d1548
--- /dev/null
+++ b/include/uapi/linux/maxim_sti.h
@@ -0,0 +1,330 @@
+/* drivers/input/touchscreen/maxim_sti.c
+ *
+ * Maxim SmartTouch Imager Touchscreen Driver
+ *
+ * Copyright (c)2013 Maxim Integrated Products, Inc.
+ * Copyright (C) 2013, NVIDIA Corporation.  All Rights Reserved.
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __MAXIM_STI_H__
+#define __MAXIM_STI_H__
+
+#ifndef __KERNEL__
+#include <stdlib.h>
+#include "genetlink.h"
+#endif
+
+#define XSTR(s)               STR(s)
+#define STR(s)                #s
+
+#define DRV_VER_MAJOR         1
+#define DRV_VER_MINOR         1
+
+#define DRIVER_VERSION_STR    XSTR(DRV_VER_MAJOR) "." XSTR(DRV_VER_MINOR)
+#define DRIVER_VERSION_NUM    ((DRV_VER_MAJOR << 8) | DRV_VER_MINOR)
+
+#define DRIVER_VERSION        DRIVER_VERSION_STR
+#define DRIVER_RELEASE        "April 29, 2015"
+#define DRIVER_PROTOCOL       0x0102
+
+/****************************************************************************\
+* Netlink: common kernel/user space macros                                   *
+\****************************************************************************/
+
+#define NL_BUF_SIZE  30720
+
+#define NL_ATTR_FIRST(nptr) \
+	((struct nlattr *)((void *)nptr + NLMSG_HDRLEN + GENL_HDRLEN))
+#define NL_ATTR_LAST(nptr) \
+	((struct nlattr *)((void *)nptr + \
+			NLMSG_ALIGN(((struct nlmsghdr *)nptr)->nlmsg_len)))
+#define NL_SIZE(nptr)   NLMSG_ALIGN(((struct nlmsghdr *)nptr)->nlmsg_len)
+#define NL_TYPE(nptr)              (((struct nlmsghdr *)nptr)->nlmsg_type)
+#define NL_SEQ(nptr)               (((struct nlmsghdr *)nptr)->nlmsg_seq)
+#define NL_OK(nptr)              (NL_TYPE(nptr) >= NLMSG_MIN_TYPE)
+#define NL_ATTR_VAL(aptr, type)  ((type *)((void *)aptr + NLA_HDRLEN))
+#define NL_ATTR_NEXT(aptr) \
+	((struct nlattr *)((void *)aptr + \
+			NLA_ALIGN(((struct nlattr *)aptr)->nla_len)))
+#define GENL_CMP(name1, name2)  strncmp(name1, name2, GENL_NAMSIZ)
+#define GENL_COPY(name1, name2) strlcpy(name1, name2, GENL_NAMSIZ)
+#define GENL_CHK(name)          (strlen(name) > (GENL_NAMSIZ - 1))
+#define MSG_TYPE(nptr)          NL_ATTR_FIRST(nptr)->nla_type
+#define MSG_PAYLOAD(nptr)       NL_ATTR_VAL(NL_ATTR_FIRST(nptr), void)
+
+/****************************************************************************\
+* Netlink: common kernel/user space inline functions                         *
+\****************************************************************************/
+
+static inline void
+nl_msg_init(void *buf, __u16 family_id, __u32 sequence, __u8 dst)
+{
+	struct nlmsghdr    *nlh = (struct nlmsghdr *)buf;
+	struct genlmsghdr  *genl = (struct genlmsghdr *)(buf + NLMSG_HDRLEN);
+
+	memset(buf, 0, NLMSG_HDRLEN + GENL_HDRLEN);
+	nlh->nlmsg_type = family_id;
+	nlh->nlmsg_flags = NLM_F_REQUEST;
+	nlh->nlmsg_seq = sequence;
+	nlh->nlmsg_len = NLMSG_HDRLEN + GENL_HDRLEN;
+	genl->cmd = dst;
+}
+
+static inline void
+*nl_alloc_attr(void *buf, __u16 type, __u16 len)
+{
+	struct nlmsghdr  *nlh = (struct nlmsghdr *)buf;
+	struct nlattr    *attr = NL_ATTR_LAST(nlh);
+
+	if ((NL_SIZE(buf) + NLMSG_ALIGN(NLA_HDRLEN + len)) > NL_BUF_SIZE)
+		return NULL;
+
+	attr->nla_type = type;
+	attr->nla_len = NLA_HDRLEN + len;
+	nlh->nlmsg_len += NLMSG_ALIGN(attr->nla_len);
+	return NL_ATTR_VAL(attr, void);
+}
+
+static inline int
+nl_add_attr(void *buf, __u16 type, void *ptr, __u16 len)
+{
+	void  *a_ptr;
+
+	a_ptr = nl_alloc_attr(buf, type, len);
+	if (a_ptr == NULL)
+		return -EPERM;
+	memcpy(a_ptr, ptr, len);
+	return 0;
+}
+
+/****************************************************************************\
+* Netlink: multicast groups enum and name strings                            *
+\****************************************************************************/
+
+enum {
+	MC_DRIVER,
+	MC_FUSION,
+	MC_EVENT_BROADCAST,
+	MC_GROUPS,
+};
+
+#define MC_DRIVER_NAME     "driver"
+#define MC_FUSION_NAME     "fusion"
+#define MC_EVENT_BROADCAST_NAME  "event_broadcast"
+
+#define NL_FAMILY_VERSION  1
+
+#define TF_FAMILY_NAME     "touch_fusion"
+
+/****************************************************************************\
+* Netlink: common parameter and message definitions                          *
+\****************************************************************************/
+
+enum {
+	DR_STATE_BASIC,
+	DR_STATE_ACTIVE,
+	DR_STATE_SUSPEND,
+	DR_STATE_RESUME,
+	DR_STATE_FAULT,
+};
+
+enum {
+	DR_INPUT_FINGER,
+	DR_INPUT_STYLUS,
+	DR_INPUT_ERASER,
+};
+
+enum {
+	DR_IRQ_FALLING_EDGE,
+	DR_IRQ_RISING_EDGE,
+};
+
+enum {
+	DR_ADD_MC_GROUP,
+	DR_ECHO_REQUEST,
+	DR_CHIP_READ,
+	DR_CHIP_WRITE,
+	DR_CHIP_RESET,
+	DR_GET_IRQLINE,
+	DR_DELAY,
+	DR_CHIP_ACCESS_METHOD,
+	DR_CONFIG_IRQ,
+	DR_CONFIG_INPUT,
+	DR_CONFIG_WATCHDOG,
+	DR_DECONFIG,
+	DR_INPUT,
+	DR_RESUME_ACK,
+	DR_LEGACY_FWDL,
+	DR_LEGACY_ACCELERATION,
+	DR_HANDSHAKE,
+	DR_CONFIG_FW,
+	DR_IDLE,
+	DR_SYSFS_ACK,
+	DR_TF_STATUS,
+};
+
+struct __attribute__ ((__packed__)) dr_add_mc_group {
+	__u8  number;
+	char  name[GENL_NAMSIZ];
+};
+
+struct __attribute__ ((__packed__)) dr_echo_request {
+	__u32  cookie;
+};
+
+struct __attribute__ ((__packed__)) dr_chip_read {
+	__u16  address;
+	__u16  length;
+};
+
+struct __attribute__ ((__packed__)) dr_chip_write {
+	__u16  address;
+	__u16  length;
+	__u8   data[0];
+};
+
+struct __attribute__ ((__packed__)) dr_chip_reset {
+	__u8  state;
+};
+
+struct __attribute__ ((__packed__)) dr_delay {
+	__u32  period;
+};
+
+struct __attribute__ ((__packed__)) dr_chip_access_method {
+	__u8  method;
+};
+
+#define MAX_IRQ_PARAMS  37
+struct __attribute__ ((__packed__)) dr_config_irq {
+	__u8   irq_method;
+	__u8   irq_edge;
+	__u8   irq_params;
+	__u16  irq_param[MAX_IRQ_PARAMS];
+};
+
+struct __attribute__ ((__packed__)) dr_config_input {
+	__u16  x_range;
+	__u16  y_range;
+};
+
+struct __attribute__ ((__packed__)) dr_config_watchdog {
+	__u32  pid;
+};
+
+struct __attribute__ ((__packed__)) dr_input_event {
+	__u8   id;
+	__u8   tool_type;
+	__u16  x;
+	__u16  y;
+	__u8   z;
+};
+
+#define MAX_INPUT_EVENTS  10
+struct __attribute__ ((__packed__)) dr_input {
+	struct dr_input_event  event[MAX_INPUT_EVENTS];
+	__u8                   events;
+};
+
+struct __attribute__ ((__packed__)) dr_legacy_acceleration {
+	__u8  enable;
+};
+
+struct __attribute__ ((__packed__)) dr_handshake {
+	__u16 tf_ver;
+	__u16 chip_id;
+};
+
+#define  DR_SYSFS_UPDATE_NONE     0x0000
+#define  DR_SYSFS_UPDATE_BIT_GLOVE    0
+#define  DR_SYSFS_UPDATE_BIT_CHARGER  1
+#define  DR_SYSFS_UPDATE_BIT_LCD_FPS  2
+
+#define  DR_SYSFS_ACK_GLOVE       0x5A5A5A5A
+#define  DR_SYSFS_ACK_CHARGER     0xA5A5A5A5
+#define  DR_SYSFS_ACK_LCD_FPS     0xC3C3C3C3
+
+enum {
+	DR_NO_CHARGER,
+	DR_WIRED_CHARGER,
+	DR_WIRELESS_CHARGER,
+};
+
+struct __attribute__ ((__packed__)) dr_sysfs_ack {
+	__u32 type;
+};
+
+struct __attribute__ ((__packed__)) dr_config_fw {
+	__u16 fw_ver;
+	__u16 fw_protocol;
+};
+
+struct __attribute__ ((__packed__)) dr_idle {
+	__u8  idle;
+};
+
+#define  TF_STATUS_DEFAULT_LOADED (1 << 0)
+#define  TF_STATUS_BUSY (1 << 1)
+
+struct __attribute__ ((__packed__)) dr_tf_status {
+	__u32 tf_status;
+};
+
+enum {
+	FU_ECHO_RESPONSE,
+	FU_CHIP_READ_RESULT,
+	FU_IRQLINE_STATUS,
+	FU_ASYNC_DATA,
+	FU_RESUME,
+	FU_HANDSHAKE_RESPONSE,
+	FU_SYSFS_INFO,
+};
+
+struct __attribute__ ((__packed__)) fu_echo_response {
+	__u32  cookie;
+	__u8   driver_state;
+};
+
+struct __attribute__ ((__packed__)) fu_chip_read_result {
+	__u16  address;
+	__u16  length;
+	__u8   data[0];
+};
+
+struct __attribute__ ((__packed__)) fu_irqline_status {
+	__u8  status;
+};
+
+struct __attribute__ ((__packed__)) fu_async_data {
+	__u16  address;
+	__u16  length;
+	__u16  status;
+	__u8   data[0];
+};
+
+struct __attribute__ ((__packed__)) fu_handshake_response {
+	__u16  driver_ver;
+	__u16  panel_id;
+	__u16  driver_protocol;
+};
+
+struct __attribute__ ((__packed__)) fu_sysfs_info {
+	__u8   type;
+	__u16  glove_value;
+	__u16  charger_value;
+	__u16  lcd_fps_value;
+};
+
+#endif
+