input: touchscreen: maxim_sti: initial commit

Maxim SmartTouch Imager Touchscreen driver added.

Change-Id: Ia570d7afa09bc081df6d79cd7a2f432867113439
Git-commit: b223650ce7eae499cf1a3474ad9a7019e1e3edf1
Git-repo: https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/log/?h=github-maxim_sti/A2
[jinglin@codeaurora.org: add subject line to commit text]
Signed-off-by: Jing Lin <jinglin@codeaurora.org>

1 files changed, 282 insertions, 0 deletions

diff --git a/include/linux/input/maxim_sti.h b/include/linux/input/maxim_sti.h
new file mode 100644
index 000000000000..60320708cae0
--- /dev/null
+++ b/include/linux/input/maxim_sti.h
@@ -0,0 +1,282 @@
+/* drivers/input/touchscreen/maxim_sti.c
+ *
+ * Maxim SmartTouch Imager Touchscreen Driver
+ *
+ * Copyright (c)2013 Maxim Integrated Products, Inc.
+ *
+ * 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__
+
+#ifdef __KERNEL__
+#include <net/genetlink.h>
+#include <net/sock.h>
+#else
+#include <stdlib.h>
+#include "genetlink.h"
+#endif
+
+#define DRIVER_VERSION  "1.4.1"
+#define DRIVER_RELEASE  "August 14, 2013"
+
+/****************************************************************************\
+* Netlink: common kernel/user space macros                                   *
+\****************************************************************************/
+
+#define NL_BUF_SIZE  8192
+
+#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) strncpy(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 -1;
+	memcpy(a_ptr, ptr, len);
+	return 0;
+}
+
+/****************************************************************************\
+* Netlink: multicast groups enum and name strings                            *
+\****************************************************************************/
+
+enum {
+	MC_DRIVER,
+	MC_FUSION,
+	MC_REQUIRED_GROUPS,
+};
+
+#define MC_DRIVER_NAME     "driver"
+#define MC_FUSION_NAME     "fusion"
+
+#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_LEGACY_FWDL,
+	DR_LEGACY_ACCELERATION,
+};
+
+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  20
+struct __attribute__ ((__packed__)) dr_config_irq {
+	__u16  irq_param[MAX_IRQ_PARAMS];
+	__u8   irq_params;
+	__u8   irq_method;
+	__u8   irq_edge;
+};
+
+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;
+};
+
+enum {
+	FU_ECHO_RESPONSE,
+	FU_CHIP_READ_RESULT,
+	FU_IRQLINE_STATUS,
+	FU_ASYNC_DATA,
+	FU_RESUME,
+};
+
+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];
+};
+
+#ifdef __KERNEL__
+/****************************************************************************\
+* Kernel platform data structure                                             *
+\****************************************************************************/
+
+#define MAXIM_STI_NAME  "maxim_sti"
+
+struct maxim_sti_pdata {
+	char      *touch_fusion;
+	char      *config_file;
+	char      *nl_family;
+	u8        nl_mc_groups;
+	u8        chip_access_method;
+	u8        default_reset_state;
+	u16       tx_buf_size;
+	u16       rx_buf_size;
+	unsigned  gpio_reset;
+	unsigned  gpio_irq;
+	int       (*init)(struct maxim_sti_pdata *pdata, bool init);
+	void      (*reset)(struct maxim_sti_pdata *pdata, int value);
+	int       (*irq)(struct maxim_sti_pdata *pdata);
+};
+#endif
+
+#endif
+