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    Subject[PATCH 1/3] Input: cyttsp - Cypress TTSP capacitive multi-touch screen support
    Date
    Cypress TrueTouch(tm) Standard Product controllers are found in
    a wide range of embedded devices. This driver add support for a
    variety of TTSP controllers.

    The driver is composed of a core driver that process the data sent by
    the contacts and a set of bus specific interface modules. This patch
    adds the base core TTSP driver.

    The original author of the driver is Kevin McNeely <kev@cypress.com>

    Since the hardware is capable of tracking identifiable contacts and the
    original driver used multi-touch protocol type A (stateless), multi-touch
    protocol type B (stateful) support was added by Javier Martinez Canillas.

    Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
    ---
    drivers/input/touchscreen/Kconfig | 2 +
    drivers/input/touchscreen/Makefile | 1 +
    drivers/input/touchscreen/cyttsp/Kconfig | 4 +
    drivers/input/touchscreen/cyttsp/Makefile | 1 +
    drivers/input/touchscreen/cyttsp/cyttsp_core.c | 874 ++++++++++++++++++++++++
    drivers/input/touchscreen/cyttsp/cyttsp_core.h | 56 ++
    include/linux/input/cyttsp.h | 68 ++
    7 files changed, 1006 insertions(+), 0 deletions(-)
    create mode 100644 drivers/input/touchscreen/cyttsp/Kconfig
    create mode 100644 drivers/input/touchscreen/cyttsp/Makefile
    create mode 100644 drivers/input/touchscreen/cyttsp/cyttsp_core.c
    create mode 100644 drivers/input/touchscreen/cyttsp/cyttsp_core.h
    create mode 100644 include/linux/input/cyttsp.h

    diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
    index cabd9e5..6933823 100644
    --- a/drivers/input/touchscreen/Kconfig
    +++ b/drivers/input/touchscreen/Kconfig
    @@ -726,4 +726,6 @@ config TOUCHSCREEN_TPS6507X
    To compile this driver as a module, choose M here: the
    module will be called tps6507x_ts.

    +source "drivers/input/touchscreen/cyttsp/Kconfig"
    +
    endif
    diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
    index 282d6f7..945950a 100644
    --- a/drivers/input/touchscreen/Makefile
    +++ b/drivers/input/touchscreen/Makefile
    @@ -60,3 +60,4 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
    obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
    obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
    obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o
    +obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp/
    diff --git a/drivers/input/touchscreen/cyttsp/Kconfig b/drivers/input/touchscreen/cyttsp/Kconfig
    new file mode 100644
    index 0000000..7e8e0f4
    --- /dev/null
    +++ b/drivers/input/touchscreen/cyttsp/Kconfig
    @@ -0,0 +1,4 @@
    +config TOUCHSCREEN_CYTTSP_CORE
    + tristate "Cypress TTSP touchscreen core"
    + help
    + Always activated for Cypress TTSP touchscreen
    diff --git a/drivers/input/touchscreen/cyttsp/Makefile b/drivers/input/touchscreen/cyttsp/Makefile
    new file mode 100644
    index 0000000..d1b250f
    --- /dev/null
    +++ b/drivers/input/touchscreen/cyttsp/Makefile
    @@ -0,0 +1 @@
    +obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
    diff --git a/drivers/input/touchscreen/cyttsp/cyttsp_core.c b/drivers/input/touchscreen/cyttsp/cyttsp_core.c
    new file mode 100644
    index 0000000..b37c0b8
    --- /dev/null
    +++ b/drivers/input/touchscreen/cyttsp/cyttsp_core.c
    @@ -0,0 +1,874 @@
    +/*
    + * Core Source for:
    + * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
    + * For use with Cypress Txx3xx parts.
    + * Supported parts include:
    + * CY8CTST341
    + * CY8CTMA340
    + *
    + * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
    + * Copyright (C) 2011 Javier Martinez Canillas <martinez.javier@gmail.com>
    + *
    + * Added multi-touch protocol type B support by Javier Martinez Canillas
    + *
    + * This program is free software; you can redistribute it and/or
    + * modify it under the terms of the GNU General Public License
    + * version 2, and only version 2, as published by the
    + * Free Software Foundation.
    + *
    + * 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.
    + *
    + * You should have received a copy of the GNU General Public License along
    + * with this program; if not, write to the Free Software Foundation, Inc.,
    + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
    + *
    + * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
    + *
    + */
    +
    +#include "cyttsp_core.h"
    +
    +#include <linux/delay.h>
    +#include <linux/input.h>
    +#include <linux/input/mt.h>
    +#include <linux/gpio.h>
    +#include <linux/interrupt.h>
    +#include <linux/slab.h>
    +
    +/* Bootloader number of command keys */
    +#define CY_NUM_BL_KEYS 8
    +
    +/* helpers */
    +#define GET_NUM_TOUCHES(x) ((x) & 0x0F)
    +#define IS_LARGE_AREA(x) (((x) & 0x10) >> 4)
    +#define IS_BAD_PKT(x) ((x) & 0x20)
    +#define IS_VALID_APP(x) ((x) & 0x01)
    +#define IS_OPERATIONAL_ERR(x) ((x) & 0x3F)
    +#define GET_HSTMODE(reg) ((reg & 0x70) >> 4)
    +#define GET_BOOTLOADERMODE(reg) ((reg & 0x10) >> 4)
    +
    +#define CY_REG_BASE 0x00
    +#define CY_REG_ACT_DIST 0x1E
    +#define CY_REG_ACT_INTRVL 0x1D
    +#define CY_REG_TCH_TMOUT (CY_REG_ACT_INTRVL+1)
    +#define CY_REG_LP_INTRVL (CY_REG_TCH_TMOUT+1)
    +#define CY_MAXZ 255
    +#define CY_DELAY_DFLT 20 /* ms */
    +#define CY_DELAY_MAX (500/CY_DELAY_DFLT) /* half second */
    +#define CY_ACT_DIST_DFLT 0xF8
    +#define CY_HNDSHK_BIT 0x80
    +/* device mode bits */
    +#define CY_OPERATE_MODE 0x00
    +#define CY_SYSINFO_MODE 0x10
    +/* power mode select bits */
    +#define CY_SOFT_RESET_MODE 0x01 /* return to Bootloader mode */
    +#define CY_DEEP_SLEEP_MODE 0x02
    +#define CY_LOW_POWER_MODE 0x04
    +
    +/* Slots management */
    +#define CY_MAX_FINGER 4
    +#define CY_SLOT_UNUSED 0
    +
    +struct cyttsp_tch {
    + __be16 x, y;
    + u8 z;
    +} __packed;
    +
    +/* TrueTouch Standard Product Gen3 interface definition */
    +struct cyttsp_xydata {
    + u8 hst_mode;
    + u8 tt_mode;
    + u8 tt_stat;
    + struct cyttsp_tch tch1;
    + u8 touch12_id;
    + struct cyttsp_tch tch2;
    + u8 gest_cnt;
    + u8 gest_id;
    + struct cyttsp_tch tch3;
    + u8 touch34_id;
    + struct cyttsp_tch tch4;
    + u8 tt_undef[3];
    + u8 act_dist;
    + u8 tt_reserved;
    +} __packed;
    +
    +/* TTSP System Information interface definition */
    +struct cyttsp_sysinfo_data {
    + u8 hst_mode;
    + u8 mfg_cmd;
    + u8 mfg_stat;
    + u8 cid[3];
    + u8 tt_undef1;
    + u8 uid[8];
    + u8 bl_verh;
    + u8 bl_verl;
    + u8 tts_verh;
    + u8 tts_verl;
    + u8 app_idh;
    + u8 app_idl;
    + u8 app_verh;
    + u8 app_verl;
    + u8 tt_undef[5];
    + u8 scn_typ;
    + u8 act_intrvl;
    + u8 tch_tmout;
    + u8 lp_intrvl;
    +};
    +
    +/* TTSP Bootloader Register Map interface definition */
    +#define CY_BL_CHKSUM_OK 0x01
    +struct cyttsp_bootloader_data {
    + u8 bl_file;
    + u8 bl_status;
    + u8 bl_error;
    + u8 blver_hi;
    + u8 blver_lo;
    + u8 bld_blver_hi;
    + u8 bld_blver_lo;
    + u8 ttspver_hi;
    + u8 ttspver_lo;
    + u8 appid_hi;
    + u8 appid_lo;
    + u8 appver_hi;
    + u8 appver_lo;
    + u8 cid_0;
    + u8 cid_1;
    + u8 cid_2;
    +};
    +
    +struct cyttsp {
    + struct device *dev;
    + int irq;
    + struct input_dev *input;
    + char phys[32];
    + const struct bus_type *bus_type;
    + const struct cyttsp_platform_data *platform_data;
    + struct cyttsp_bus_ops *bus_ops;
    + struct cyttsp_bootloader_data bl_data;
    + struct cyttsp_sysinfo_data sysinfo_data;
    + struct completion bl_ready;
    + enum cyttsp_powerstate power_state;
    + int slot_cnt;
    + int slots[CY_MAX_FINGER];
    + int slot_status[CY_MAX_FINGER];
    +};
    +
    +static const u8 bl_command[] = {
    + 0x00, /* file offset */
    + 0xFF, /* command */
    + 0xA5, /* exit bootloader command */
    + 0, 1, 2, 3, 4, 5, 6, 7 /* default keys */
    +};
    +
    +static int ttsp_read_block_data(struct cyttsp *ts, u8 command,
    + u8 length, void *buf)
    +{
    + int retval;
    + int tries;
    +
    + if (!buf || !length)
    + return -EINVAL;
    +
    + for (tries = 0, retval = -1;
    + tries < CY_NUM_RETRY && (retval < 0);
    + tries++)
    + retval = ts->bus_ops->read(ts->bus_ops, command, length, buf);
    +
    + return retval;
    +}
    +
    +static int ttsp_write_block_data(struct cyttsp *ts, u8 command,
    + u8 length, void *buf)
    +{
    + int retval;
    + if (!buf || !length)
    + return -EINVAL;
    +
    + retval = ts->bus_ops->write(ts->bus_ops, command, length, buf);
    +
    + return retval;
    +}
    +
    +static int ttsp_tch_ext(struct cyttsp *ts, void *buf)
    +{
    + int retval;
    +
    + if (!buf)
    + return -EIO;
    +
    + retval = ts->bus_ops->ext(ts->bus_ops, buf);
    +
    + return retval;
    +}
    +
    +static int cyttsp_load_bl_regs(struct cyttsp *ts)
    +{
    + int retval;
    +
    + memset(&(ts->bl_data), 0, sizeof(struct cyttsp_bootloader_data));
    +
    + retval = ttsp_read_block_data(ts, CY_REG_BASE,
    + sizeof(ts->bl_data), &(ts->bl_data));
    +
    + return retval;
    +}
    +
    +static int cyttsp_bl_app_valid(struct cyttsp *ts)
    +{
    + int retval;
    +
    + retval = cyttsp_load_bl_regs(ts);
    +
    + if (retval < 0)
    + return -ENODEV;
    +
    + if (GET_BOOTLOADERMODE(ts->bl_data.bl_status)) {
    + if (IS_VALID_APP(ts->bl_data.bl_status)) {
    + dev_dbg(ts->dev, "%s: App found; normal boot\n",
    + __func__);
    + return 0;
    + } else {
    + dev_dbg(ts->dev, "%s: NO APP; load firmware!!\n",
    + __func__);
    + return -ENODEV;
    + }
    + } else if (GET_HSTMODE(ts->bl_data.bl_file) == CY_OPERATE_MODE) {
    + if (!(IS_OPERATIONAL_ERR(ts->bl_data.bl_status))) {
    + dev_dbg(ts->dev, "%s: Operational\n",
    + __func__);
    + return 1;
    + } else {
    + dev_dbg(ts->dev, "%s: Operational failure\n",
    + __func__);
    + return -ENODEV;
    + }
    + } else {
    + dev_dbg(ts->dev, "%s: Non-Operational failure\n",
    + __func__);
    + return -ENODEV;
    + }
    +
    +}
    +
    +static int cyttsp_exit_bl_mode(struct cyttsp *ts)
    +{
    + int retval;
    + int tries;
    + u8 bl_cmd[sizeof(bl_command)];
    +
    + memcpy(bl_cmd, bl_command, sizeof(bl_command));
    + if (ts->platform_data->bl_keys)
    + memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS],
    + ts->platform_data->bl_keys, sizeof(bl_command));
    +
    + dev_dbg(ts->dev,
    + "%s: bl_cmd= "
    + "%02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n",
    + __func__, bl_cmd[0], bl_cmd[1], bl_cmd[2],
    + bl_cmd[3], bl_cmd[4], bl_cmd[5], bl_cmd[6],
    + bl_cmd[7], bl_cmd[8], bl_cmd[9], bl_cmd[10]);
    +
    + retval = ttsp_write_block_data(ts, CY_REG_BASE,
    + sizeof(bl_cmd), (void *)bl_cmd);
    + if (retval < 0)
    + return retval;
    +
    + /* wait for TTSP Device to complete switch to Operational mode */
    + tries = 0;
    + do {
    + msleep(CY_DELAY_DFLT);
    + retval = cyttsp_load_bl_regs(ts);
    + } while (!((retval == 0) &&
    + !GET_BOOTLOADERMODE(ts->bl_data.bl_status)) &&
    + (tries++ < CY_DELAY_MAX));
    +
    + dev_dbg(ts->dev, "%s: check bl ready tries=%d ret=%d stat=%02X\n",
    + __func__, tries, retval, ts->bl_data.bl_status);
    +
    + if (retval < 0)
    + return retval;
    + else if (GET_BOOTLOADERMODE(ts->bl_data.bl_status))
    + return -ENODEV;
    + else
    + return 0;
    +}
    +
    +static int cyttsp_set_operational_mode(struct cyttsp *ts)
    +{
    + struct cyttsp_xydata xy_data;
    + int retval;
    + int tries;
    + u8 cmd = CY_OPERATE_MODE;
    +
    + retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
    +
    + if (retval < 0)
    + return retval;
    +
    + /* wait for TTSP Device to complete switch to Operational mode */
    + tries = 0;
    + do {
    + msleep(CY_DELAY_DFLT);
    + retval = ttsp_read_block_data(ts, CY_REG_BASE,
    + sizeof(xy_data), &(xy_data));
    + } while (!((retval == 0) &&
    + (xy_data.act_dist == CY_ACT_DIST_DFLT)) &&
    + (tries++ < CY_DELAY_MAX));
    +
    + dev_dbg(ts->dev, "%s: check op ready tries=%d ret=%d dist=%02X\n",
    + __func__, tries, retval, xy_data.act_dist);
    +
    + return retval;
    +}
    +
    +static int cyttsp_set_sysinfo_mode(struct cyttsp *ts)
    +{
    + int retval;
    + int tries;
    + u8 cmd = CY_SYSINFO_MODE;
    +
    + memset(&(ts->sysinfo_data), 0, sizeof(struct cyttsp_sysinfo_data));
    +
    + /* switch to sysinfo mode */
    + retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
    + if (retval < 0)
    + return retval;
    +
    + /* read sysinfo registers */
    + tries = 0;
    + do {
    + msleep(CY_DELAY_DFLT);
    + retval = ttsp_read_block_data(ts, CY_REG_BASE,
    + sizeof(ts->sysinfo_data), &(ts->sysinfo_data));
    + } while (!((retval == 0) &&
    + !((ts->sysinfo_data.tts_verh == 0) &&
    + (ts->sysinfo_data.tts_verl == 0))) &&
    + (tries++ < CY_DELAY_MAX));
    +
    + dev_dbg(ts->dev, "%s: check sysinfo ready tries=%d ret=%d\n",
    + __func__, tries, retval);
    +
    + dev_info(ts->dev, "%s: tv=%02X%02X ai=0x%02X%02X "
    + "av=0x%02X%02X ci=0x%02X%02X%02X\n", "cyttsp",
    + ts->sysinfo_data.tts_verh, ts->sysinfo_data.tts_verl,
    + ts->sysinfo_data.app_idh, ts->sysinfo_data.app_idl,
    + ts->sysinfo_data.app_verh, ts->sysinfo_data.app_verl,
    + ts->sysinfo_data.cid[0], ts->sysinfo_data.cid[1],
    + ts->sysinfo_data.cid[2]);
    +
    + return retval;
    +}
    +
    +static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
    +{
    + int retval = 0;
    +
    + if (ts->platform_data->act_intrvl != CY_ACT_INTRVL_DFLT ||
    + ts->platform_data->tch_tmout != CY_TCH_TMOUT_DFLT ||
    + ts->platform_data->lp_intrvl != CY_LP_INTRVL_DFLT) {
    +
    + u8 intrvl_ray[3];
    +
    + intrvl_ray[0] = ts->platform_data->act_intrvl;
    + intrvl_ray[1] = ts->platform_data->tch_tmout;
    + intrvl_ray[2] = ts->platform_data->lp_intrvl;
    +
    + /* set intrvl registers */
    + retval = ttsp_write_block_data(ts,
    + CY_REG_ACT_INTRVL,
    + sizeof(intrvl_ray), intrvl_ray);
    +
    + msleep(CY_DELAY_DFLT);
    + }
    +
    + return retval;
    +}
    +
    +static int cyttsp_soft_reset(struct cyttsp *ts)
    +{
    + int retval;
    + u8 cmd = CY_SOFT_RESET_MODE;
    +
    + retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
    + if (retval < 0)
    + return retval;
    +
    + /* wait for interrupt to set ready completion */
    + INIT_COMPLETION(ts->bl_ready);
    +
    + retval = wait_for_completion_interruptible_timeout(&ts->bl_ready,
    + msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX));
    +
    + if (retval > 0)
    + retval = 0;
    +
    + return retval;
    +}
    +
    +static int cyttsp_act_dist_setup(struct cyttsp *ts)
    +{
    + int retval;
    + u8 act_dist_setup;
    +
    + /* Init gesture; active distance setup */
    + act_dist_setup = ts->platform_data->act_dist;
    + retval = ttsp_write_block_data(ts, CY_REG_ACT_DIST,
    + sizeof(act_dist_setup), &act_dist_setup);
    +
    + return retval;
    +}
    +
    +static int cyttsp_hndshk(struct cyttsp *ts, u8 hst_mode)
    +{
    + int retval;
    + u8 cmd;
    +
    + cmd = hst_mode & CY_HNDSHK_BIT ?
    + hst_mode & ~CY_HNDSHK_BIT :
    + hst_mode | CY_HNDSHK_BIT;
    +
    + retval = ttsp_write_block_data(ts, CY_REG_BASE,
    + sizeof(cmd), (u8 *)&cmd);
    +
    + return retval;
    +}
    +
    +static void cyttsp_report_slot(struct input_dev *dev, int slot,
    + int x, int y, int z)
    +{
    + input_mt_slot(dev, slot);
    + input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
    + input_report_abs(dev, ABS_MT_POSITION_X, x);
    + input_report_abs(dev, ABS_MT_POSITION_Y, y);
    + input_report_abs(dev, ABS_MT_TOUCH_MAJOR, z);
    +}
    +
    +static void cyttsp_report_slot_empty(struct input_dev *dev, int slot)
    +{
    + input_mt_slot(dev, slot);
    + input_mt_report_slot_state(dev, MT_TOOL_FINGER, false);
    +}
    +
    +static void cyttsp_extract_track_ids(struct cyttsp_xydata *xy_data, int *ids)
    +{
    + ids[0] = xy_data->touch12_id >> 4;
    + ids[1] = xy_data->touch12_id & 0xF;
    + ids[2] = xy_data->touch34_id >> 4;
    + ids[3] = xy_data->touch34_id & 0xF;
    +}
    +
    +static void cyttsp_get_tch(struct cyttsp_xydata *xy_data, int idx,
    + struct cyttsp_tch **tch)
    +{
    + switch (idx) {
    + case 0:
    + *tch = &xy_data->tch1;
    + break;
    + case 1:
    + *tch = &xy_data->tch2;
    + break;
    + case 2:
    + *tch = &xy_data->tch3;
    + break;
    + case 3:
    + *tch = &xy_data->tch4;
    + break;
    + }
    +}
    +
    +static int cyttsp_get_slot_id(struct cyttsp *ts, int id)
    +{
    + int i;
    +
    + for (i = 0; i < CY_MAX_FINGER; i++)
    + if (ts->slots[i] == id)
    + return i;
    +
    + return -1;
    +}
    +
    +static int cyttsp_assign_next_slot(struct cyttsp *ts, int id)
    +{
    + int i;
    +
    + for (i = 0; i < CY_MAX_FINGER; i++)
    + if (ts->slots[i] == CY_SLOT_UNUSED) {
    + ts->slots[i] = id;
    + ts->slot_cnt++;
    + return i;
    + }
    +
    + return -1;
    +}
    +
    +static int cyttsp_xy_worker(struct cyttsp *ts)
    +{
    + struct cyttsp_xydata xy_data;
    + u8 num_cur_tch;
    + int i;
    + int ids[4];
    + int slot = -1;
    + struct cyttsp_tch *tch = NULL;
    + int x, y, z;
    +
    + /* Get touch data from CYTTSP device */
    + if (ttsp_read_block_data(ts,
    + CY_REG_BASE, sizeof(struct cyttsp_xydata), &xy_data))
    + return 0;
    +
    + /* touch extension handling */
    + if (ttsp_tch_ext(ts, &xy_data))
    + return 0;
    +
    + /* provide flow control handshake */
    + if (ts->platform_data->use_hndshk)
    + if (cyttsp_hndshk(ts, xy_data.hst_mode))
    + return 0;
    +
    + /* determine number of currently active touches */
    + num_cur_tch = GET_NUM_TOUCHES(xy_data.tt_stat);
    +
    + /* check for any error conditions */
    + if (ts->power_state == CY_IDLE_STATE)
    + return 0;
    + else if (GET_BOOTLOADERMODE(xy_data.tt_mode)) {
    + return -1;
    + } else if (IS_LARGE_AREA(xy_data.tt_stat) == 1) {
    + /* terminate all active tracks */
    + num_cur_tch = 0;
    + dev_dbg(ts->dev, "%s: Large area detected\n", __func__);
    + } else if (num_cur_tch > CY_MAX_FINGER) {
    + /* terminate all active tracks */
    + num_cur_tch = 0;
    + dev_dbg(ts->dev, "%s: Num touch error detected\n", __func__);
    + } else if (IS_BAD_PKT(xy_data.tt_mode)) {
    + /* terminate all active tracks */
    + num_cur_tch = 0;
    + dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__);
    + }
    +
    + cyttsp_extract_track_ids(&xy_data, ids);
    +
    + for (i = 0; i < CY_MAX_FINGER; i++)
    + ts->slot_status[i] = false;
    +
    + for (i = 0; i < num_cur_tch; i++) {
    + slot = cyttsp_get_slot_id(ts, ids[i]);
    +
    + if (slot < 0)
    + slot = cyttsp_assign_next_slot(ts, ids[i]);
    +
    + cyttsp_get_tch(&xy_data, i, &tch);
    +
    + x = be16_to_cpu(tch->x);
    + y = be16_to_cpu(tch->y);
    + z = tch->z;
    +
    + cyttsp_report_slot(ts->input, slot, x, y, z);
    +
    + ts->slot_status[slot] = true;
    + }
    +
    + for (i = 0; i < CY_MAX_FINGER; i++)
    + if (ts->slot_status[i] == false &&
    + ts->slots[i] != CY_SLOT_UNUSED) {
    + ts->slots[i] = CY_SLOT_UNUSED;
    + ts->slot_cnt--;
    + cyttsp_report_slot_empty(ts->input, i);
    + }
    +
    + input_sync(ts->input);
    +
    + return 0;
    +}
    +
    +static void cyttsp_pr_state(struct cyttsp *ts)
    +{
    + static char *cyttsp_powerstate_string[] = {
    + "IDLE",
    + "ACTIVE",
    + "LOW_PWR",
    + "SLEEP",
    + "BOOTLOADER",
    + "INVALID"
    + };
    +
    + dev_info(ts->dev, "%s: %s\n", __func__,
    + ts->power_state < CY_INVALID_STATE ?
    + cyttsp_powerstate_string[ts->power_state] :
    + "INVALID");
    +}
    +
    +static irqreturn_t cyttsp_irq(int irq, void *handle)
    +{
    + struct cyttsp *ts = handle;
    + int retval;
    +
    + if (ts->power_state == CY_BL_STATE)
    + complete(&ts->bl_ready);
    + else {
    + /* process the touches */
    + retval = cyttsp_xy_worker(ts);
    +
    + if (retval < 0) {
    + /*
    + * TTSP device has reset back to bootloader mode.
    + * Restore to operational mode.
    + */
    + retval = cyttsp_exit_bl_mode(ts);
    + if (retval)
    + ts->power_state = CY_IDLE_STATE;
    + else
    + ts->power_state = CY_ACTIVE_STATE;
    + cyttsp_pr_state(ts);
    + }
    + }
    +
    + return IRQ_HANDLED;
    +}
    +
    +static int cyttsp_power_on(struct cyttsp *ts)
    +{
    + int retval = 0;
    +
    + if (!ts)
    + return -ENOMEM;
    +
    + ts->power_state = CY_BL_STATE;
    +
    + /* enable interrupts */
    + retval = request_threaded_irq(ts->irq, NULL, cyttsp_irq,
    + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
    + ts->platform_data->name, ts);
    + if (retval < 0)
    + goto bypass;
    +
    + retval = cyttsp_soft_reset(ts);
    + if (retval < 0)
    + goto bypass;
    +
    + retval = cyttsp_bl_app_valid(ts);
    + if (retval < 0)
    + goto bypass;
    + else if (retval > 0)
    + goto no_bl_bypass;
    +
    + retval = cyttsp_exit_bl_mode(ts);
    +
    + if (retval < 0)
    + goto bypass;
    +
    + ts->power_state = CY_IDLE_STATE;
    +
    +no_bl_bypass:
    + retval = cyttsp_set_sysinfo_mode(ts);
    + if (retval < 0)
    + goto bypass;
    +
    + retval = cyttsp_set_sysinfo_regs(ts);
    + if (retval < 0)
    + goto bypass;
    +
    + retval = cyttsp_set_operational_mode(ts);
    + if (retval < 0)
    + goto bypass;
    +
    + /* init active distance */
    + retval = cyttsp_act_dist_setup(ts);
    + if (retval < 0)
    + goto bypass;
    +
    + ts->power_state = CY_ACTIVE_STATE;
    + retval = 0;
    +
    +bypass:
    + cyttsp_pr_state(ts);
    + return retval;
    +}
    +
    +#ifdef CONFIG_PM
    +int cyttsp_resume(void *handle)
    +{
    + struct cyttsp *ts = handle;
    + int retval = 0;
    + struct cyttsp_xydata xydata;
    +
    + if (ts->platform_data->use_sleep && (ts->power_state !=
    + CY_ACTIVE_STATE)) {
    + if (ts->platform_data->wakeup) {
    + retval = ts->platform_data->wakeup();
    + if (retval < 0)
    + dev_dbg(ts->dev, "%s: Error, wakeup failed!\n",
    + __func__);
    + } else {
    + dev_dbg(ts->dev, "%s: Error, wakeup not implemented "
    + "(check board file).\n", __func__);
    + retval = -ENOSYS;
    + }
    + if (!(retval < 0)) {
    + retval = ttsp_read_block_data(ts, CY_REG_BASE,
    + sizeof(xydata), &xydata);
    + if (!(retval < 0) && !GET_HSTMODE(xydata.hst_mode))
    + ts->power_state = CY_ACTIVE_STATE;
    + }
    + }
    + dev_dbg(ts->dev, "%s: Wake Up %s\n", __func__,
    + (retval < 0) ? "FAIL" : "PASS");
    + return retval;
    +}
    +EXPORT_SYMBOL_GPL(cyttsp_resume);
    +
    +int cyttsp_suspend(void *handle)
    +{
    + struct cyttsp *ts = handle;
    + u8 sleep_mode = 0;
    + int retval = 0;
    +
    + if (ts->platform_data->use_sleep &&
    + (ts->power_state == CY_ACTIVE_STATE)) {
    + sleep_mode = CY_DEEP_SLEEP_MODE;
    + retval = ttsp_write_block_data(ts,
    + CY_REG_BASE, sizeof(sleep_mode), &sleep_mode);
    + if (!(retval < 0))
    + ts->power_state = CY_SLEEP_STATE;
    + }
    + dev_dbg(ts->dev, "%s: Sleep Power state is %s\n", __func__,
    + (ts->power_state == CY_ACTIVE_STATE) ?
    + "ACTIVE" :
    + ((ts->power_state == CY_SLEEP_STATE) ?
    + "SLEEP" : "LOW POWER"));
    + return retval;
    +}
    +EXPORT_SYMBOL_GPL(cyttsp_suspend);
    +#endif
    +
    +static int cyttsp_open(struct input_dev *dev)
    +{
    + struct cyttsp *ts = input_get_drvdata(dev);
    +
    + return cyttsp_power_on(ts);
    +}
    +
    +void cyttsp_core_release(void *handle)
    +{
    + struct cyttsp *ts = handle;
    +
    + if (ts) {
    + free_irq(ts->irq, ts);
    + input_unregister_device(ts->input);
    + if (ts->platform_data->exit)
    + ts->platform_data->exit();
    + input_mt_destroy_slots(ts->input);
    + kfree(ts);
    + }
    +}
    +EXPORT_SYMBOL_GPL(cyttsp_core_release);
    +
    +static void cyttsp_close(struct input_dev *dev)
    +{
    + struct cyttsp *ts = input_get_drvdata(dev);
    +
    + free_irq(ts->irq, ts);
    +}
    +
    +void *cyttsp_core_init(struct cyttsp_bus_ops *bus_ops, struct device *dev)
    +{
    + struct input_dev *input_device;
    + int i;
    +
    + struct cyttsp *ts = kzalloc(sizeof(*ts), GFP_KERNEL);
    +
    + if (!ts) {
    + pr_err("%s: Error, kzalloc\n", __func__);
    + goto error_alloc_data;
    + }
    +
    + if (dev == NULL || bus_ops == NULL) {
    + kfree(ts);
    + goto error_alloc_data;
    + }
    +
    + ts->dev = dev;
    + ts->platform_data = dev->platform_data;
    + ts->bus_ops = bus_ops;
    + init_completion(&ts->bl_ready);
    +
    + if (ts->platform_data->init) {
    + if (ts->platform_data->init()) {
    + dev_dbg(ts->dev, "%s: Error, platform init failed!\n",
    + __func__);
    + goto error_init;
    + }
    + }
    +
    + ts->irq = gpio_to_irq(ts->platform_data->irq_gpio);
    + if (ts->irq <= 0) {
    + dev_dbg(ts->dev, "%s: Error, failed to allocate irq\n",
    + __func__);
    + goto error_init;
    + }
    +
    + /* Create the input device and register it. */
    + input_device = input_allocate_device();
    + if (!input_device) {
    + dev_dbg(ts->dev, "%s: Error, failed to allocate input device\n",
    + __func__);
    + goto error_input_allocate_device;
    + }
    +
    + ts->input = input_device;
    + input_device->name = ts->platform_data->name;
    + snprintf(ts->phys, sizeof(ts->phys), "%s", dev_name(dev));
    + input_device->phys = ts->phys;
    + input_device->dev.parent = ts->dev;
    + ts->bus_type = bus_ops->dev->bus;
    + input_device->open = cyttsp_open;
    + input_device->close = cyttsp_close;
    + input_set_drvdata(input_device, ts);
    +
    + __set_bit(EV_SYN, input_device->evbit);
    + __set_bit(EV_KEY, input_device->evbit);
    + __set_bit(EV_ABS, input_device->evbit);
    +
    + input_set_abs_params(input_device, ABS_MT_POSITION_X,
    + 0, ts->platform_data->maxx, 0, 0);
    + input_set_abs_params(input_device, ABS_MT_POSITION_Y,
    + 0, ts->platform_data->maxy, 0, 0);
    + input_set_abs_params(input_device, ABS_MT_TOUCH_MAJOR,
    + 0, CY_MAXZ, 0, 0);
    +
    + input_mt_init_slots(input_device, CY_MAX_FINGER);
    +
    + for (i = 0; i < CY_MAX_FINGER; i++)
    + ts->slots[i] = CY_SLOT_UNUSED;
    +
    + ts->slot_cnt = 0;
    +
    + if (input_register_device(input_device)) {
    + dev_dbg(ts->dev, "%s: Error, failed to register input device\n",
    + __func__);
    + goto error_input_register_device;
    + }
    +
    + goto no_error;
    +
    +error_input_register_device:
    + input_unregister_device(input_device);
    +error_input_allocate_device:
    + if (ts->platform_data->exit)
    + ts->platform_data->exit();
    +error_init:
    + kfree(ts);
    +error_alloc_data:
    +no_error:
    + return ts;
    +}
    +EXPORT_SYMBOL_GPL(cyttsp_core_init);
    +
    +MODULE_LICENSE("GPL");
    +MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
    +MODULE_AUTHOR("Cypress");
    +
    diff --git a/drivers/input/touchscreen/cyttsp/cyttsp_core.h b/drivers/input/touchscreen/cyttsp/cyttsp_core.h
    new file mode 100644
    index 0000000..daa2bb8
    --- /dev/null
    +++ b/drivers/input/touchscreen/cyttsp/cyttsp_core.h
    @@ -0,0 +1,56 @@
    +/*
    + * Header file for:
    + * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
    + * For use with Cypress Txx3xx parts.
    + * Supported parts include:
    + * CY8CTST341
    + * CY8CTMA340
    + *
    + * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
    + *
    + * This program is free software; you can redistribute it and/or
    + * modify it under the terms of the GNU General Public License
    + * version 2, and only version 2, as published by the
    + * Free Software Foundation.
    + *
    + * 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.
    + *
    + * You should have received a copy of the GNU General Public License along
    + * with this program; if not, write to the Free Software Foundation, Inc.,
    + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
    + *
    + * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
    + *
    + */
    +
    +
    +#ifndef __CYTTSP_CORE_H__
    +#define __CYTTSP_CORE_H__
    +
    +#include <linux/kernel.h>
    +#include <linux/err.h>
    +#include <linux/module.h>
    +#include <linux/input/cyttsp.h>
    +
    +#define CY_NUM_RETRY 4 /* max number of retries for read ops */
    +
    +
    +struct cyttsp_bus_ops {
    + s32 (*write)(void *handle, u8 addr, u8 length, const void *values);
    + s32 (*read)(void *handle, u8 addr, u8 length, void *values);
    + s32 (*ext)(void *handle, void *values);
    + struct device *dev;
    +};
    +
    +void *cyttsp_core_init(struct cyttsp_bus_ops *bus_ops, struct device *dev);
    +
    +void cyttsp_core_release(void *handle);
    +#ifdef CONFIG_PM
    +int cyttsp_resume(void *handle);
    +int cyttsp_suspend(void *handle);
    +#endif
    +
    +#endif /* __CYTTSP_CORE_H__ */
    diff --git a/include/linux/input/cyttsp.h b/include/linux/input/cyttsp.h
    new file mode 100644
    index 0000000..3907bfc
    --- /dev/null
    +++ b/include/linux/input/cyttsp.h
    @@ -0,0 +1,68 @@
    +/*
    + * Header file for:
    + * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
    + * For use with Cypress Txx3xx parts.
    + * Supported parts include:
    + * CY8CTST341
    + * CY8CTMA340
    + *
    + * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
    + *
    + * This program is free software; you can redistribute it and/or
    + * modify it under the terms of the GNU General Public License
    + * version 2, and only version 2, as published by the
    + * Free Software Foundation.
    + *
    + * 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.
    + *
    + * You should have received a copy of the GNU General Public License along
    + * with this program; if not, write to the Free Software Foundation, Inc.,
    + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
    + *
    + * Contact Cypress Semiconductor at www.cypress.com (kev@cypress.com)
    + *
    + */
    +#ifndef _CYTTSP_H_
    +#define _CYTTSP_H_
    +
    +#define CY_SPI_NAME "cyttsp-spi"
    +#define CY_I2C_NAME "cyttsp-i2c"
    +/* Active Power state scanning/processing refresh interval */
    +#define CY_ACT_INTRVL_DFLT 0x00 /* ms */
    +/* touch timeout for the Active power */
    +#define CY_TCH_TMOUT_DFLT 0xFF /* ms */
    +/* Low Power state scanning/processing refresh interval */
    +#define CY_LP_INTRVL_DFLT 0x0A /* ms */
    +/* Active distance in pixels for a gesture to be reported */
    +#define CY_ACT_DIST_DFLT 0xF8 /* pixels */
    +
    +enum cyttsp_powerstate {
    + CY_IDLE_STATE,
    + CY_ACTIVE_STATE,
    + CY_LOW_PWR_STATE,
    + CY_SLEEP_STATE,
    + CY_BL_STATE,
    + CY_INVALID_STATE /* always last in the list */
    +};
    +
    +struct cyttsp_platform_data {
    + u32 maxx;
    + u32 maxy;
    + bool use_hndshk;
    + bool use_sleep;
    + u8 act_dist; /* Active distance */
    + u8 act_intrvl; /* Active refresh interval; ms */
    + u8 tch_tmout; /* Active touch timeout; ms */
    + u8 lp_intrvl; /* Low power refresh interval; ms */
    + int (*wakeup)(void);
    + int (*init)(void);
    + void (*exit)(void);
    + char *name;
    + s16 irq_gpio;
    + u8 *bl_keys;
    +};
    +
    +#endif /* _CYTTSP_H_ */
    --
    1.7.4.1


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