Re: [v4 1/3] 1/3 Touchscreen: Cypress TTSP G3 Core Driver

Henrik Rydberg
2011-01-05T09:00:35Z

> Cypress TTSP Gen3 Core Driver.
> Core Driver includes platform data definition file,
> core driver definition file, and core touchscreen
> touch handling of device data. Generates
> multi-touch input events.
>
> Signed-off-by: Kevin McNeely <kev@cypress.com>
> ---

Hi Kevin,

> @@ -124,6 +124,11 @@ config TOUCHSCREEN_CY8CTMG110
> To compile this driver as a module, choose M here: the
> module will be called cy8ctmg110_ts.
>
> +config TOUCHSCREEN_CYTTSP_CORE
> + tristate "Cypress TTSP touchscreen core"
> + help
> + Always activated for Cypress TTSP touchscreen
> +

This one needs a bit of elaboration, see patch at the end.

> +static const u8 bl_command[] = {
> + 0x00, /* file offset */
> + 0xFF, /* command */
> + 0xA5, /* exit bootloader command */
> + 0, 1, 2, 3, 4, 5, 6, 7 /* default keys */
> +};

Nice.

> +/* process current touches */
> +#define CY_MAX_TCH 2
> +static int cyttsp_xy_worker(struct cyttsp *ts)
> +{
> + u8 num_cur_tch;
> + u16 x[CY_MAX_TCH];
> + u16 y[CY_MAX_TCH];
> + u8 z[CY_MAX_TCH];
> + bool t[CY_MAX_TCH];
> + int i;

This became more complicated than the previous patch...

> + /* send touches */
> + if (!num_cur_tch)
> + /* terminate previous active touch */
> + input_mt_sync(ts->input);
> + else {
> + /* get touch 1 */
> + /*
> + * If there is only one current active touch,
> + * it will be reported in the touch 1 regardless
> + * if it was reported in the touch 2 previously
> + */

This statement says that t[] is not needed - the idea was to simply
set all values in x[], y[] and z[], and then loop over the num_cur_tch
touches.

> + x[0] = (ts->xy_data.tch1_xhi << 8) + ts->xy_data.tch1_xlo;
> + y[0] = (ts->xy_data.tch1_yhi << 8) + ts->xy_data.tch1_ylo;
> + z[0] = ts->xy_data.tch1_z;
> + t[0] = true;
> +
> + /* get touch 2 */
> + if (num_cur_tch == CY_MAX_TCH) {
> + x[1] = (ts->xy_data.tch2_xhi << 8) +
> + ts->xy_data.tch2_xlo;
> + y[1] = (ts->xy_data.tch2_yhi << 8) +
> + ts->xy_data.tch2_ylo;
> + z[1] = ts->xy_data.tch2_z;
> + t[1] = true;
> + }
> +
> + for (i = 0; i < CY_MAX_TCH; i++) {

Using num_cur_tch here,

> + if (t[i]) {

and removing t[i] here makes the comment above obvious.

> + input_report_abs(ts->input,
> + ABS_MT_POSITION_X, x[i]);
> + input_report_abs(ts->input,
> + ABS_MT_POSITION_Y, y[i]);
> + input_report_abs(ts->input,
> + ABS_MT_TOUCH_MAJOR, z[i]);
> + input_mt_sync(ts->input);
> + }
> + }
> + }
> +
> + input_sync(ts->input);
> +
> + return 0;
> +}

All in all, it seems we have yet to arrive at the most comfortable
solution, in particular if there is a plan to magically enable more
contacts. Looking again at the data from the device, perhaps one can
simplify things a bit more. How about the patch below, does that
still work for you?

Thanks,
Henrik
---

>From f254daabcbd891bbcc3ccc4b923cf0a848b5f913 Mon Sep 17 00:00:00 2001
From: Kevin McNeely <kev@cypress.com>
Date: Wed, 5 Jan 2011 09:34:42 +0100
Subject: [PATCH] Input: Cypress TTSP G3 Core Driver

Core Driver includes platform data definition file,
core driver definition file, and core touchscreen
touch handling of device data. Generates
multi-touch input events.

[rydberg@euromail.se: minor cleanup]
Signed-off-by: Kevin McNeely <kev@cypress.com>
---
drivers/input/touchscreen/Kconfig | 5 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/cyttsp_core.c | 758 +++++++++++++++++++++++++++++++
drivers/input/touchscreen/cyttsp_core.h | 55 +++
include/linux/input/cyttsp.h | 68 +++
5 files changed, 887 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/cyttsp_core.c
create mode 100644 drivers/input/touchscreen/cyttsp_core.h
create mode 100644 include/linux/input/cyttsp.h

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 06ea8da..c3240b8 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -124,6 +124,17 @@ config TOUCHSCREEN_CY8CTMG110
To compile this driver as a module, choose M here: the
module will be called cy8ctmg110_ts.

+config TOUCHSCREEN_CYTTSP_CORE
+ tristate "Cypress TTSP touchscreen core"
+ help
+ Say Y here if you have a Cypress TTSP touchscreen and want
+ built-in support for it.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cyttsp_core.
+
config TOUCHSCREEN_DA9034
tristate "Touchscreen support for Dialog Semiconductor DA9034"
depends on PMIC_DA903X
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 7cc1b4f..b6f1ba8 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o
obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o
obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
new file mode 100644
index 0000000..6971533
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -0,0 +1,757 @@
+/*
+ * 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.
+ *
+ * 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/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
+
+struct cyttsp_tch {
+ __be16 x, y;
+ u8 z, unused;
+} __attribute__((packed));
+
+/* TrueTouch Standard Product Gen3 interface definition */
+struct cyttsp_xydata {
+ u8 hst_mode;
+ u8 tt_mode;
+ u8 tt_stat;
+ struct cyttsp_tch tch[2];
+ u8 unused_grp[12];
+ u8 tt_undef[3];
+ u8 act_dist;
+ u8 tt_reserved;
+} __attribute__((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;
+};
+
+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 int cyttsp_xy_worker(struct cyttsp *ts)
+{
+ struct cyttsp_xydata xy_data;
+ u8 num_cur_tch;
+ int i;
+
+ /* Get touch data from CYTTSP device */
+ if (ttsp_read_block_data(ts, CY_REG_BASE, sizeof(xy_data), &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 > 2) {
+ /* 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__);
+ }
+
+ for (i = 0; i < num_cur_tch; i++) {
+ struct cyttsp_tch *tch = &xy_data.tch[i];
+ int x = be16_to_cpu(tch->x);
+ int y = be16_to_cpu(tch->y);
+ int z = tch->z;
+
+ input_report_abs(ts->input, ABS_MT_POSITION_X, x);
+ input_report_abs(ts->input, ABS_MT_POSITION_Y, y);
+ input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, z);
+ input_mt_sync(ts->input);
+ }
+
+ if (!num_cur_tch)
+ input_mt_sync(ts->input);
+ 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();
+ 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;
+
+ 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);
+
+ 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_core.h b/drivers/input/touchscreen/cyttsp_core.h
new file mode 100644
index 0000000..78001b5
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_core.h
@@ -0,0 +1,55 @@
+/*
+ * 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/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_ */
--
1.7.2.3