* [PATCH 1/3] staging: cyttsp: Add Cypress TTSP G3 Core Driver
2011-07-28 10:27 staging: Add Cypress TTSP G3 support Javier Martinez Canillas
@ 2011-07-28 10:27 ` Javier Martinez Canillas
2011-07-28 10:27 ` [PATCH 2/3] staging: cyttsp: Add Cypress TTSP G3 I2C Device Driver Javier Martinez Canillas
2011-07-28 10:27 ` [PATCH 3/3] staging: cyttsp: Add Cypress TTSP G3 SPI " Javier Martinez Canillas
2 siblings, 0 replies; 7+ messages in thread
From: Javier Martinez Canillas @ 2011-07-28 10:27 UTC (permalink / raw)
Cc: Kevin McNeely, devel, kernel-janitors, linux-input,
Steve Kolokowsky, rydberg, Oleg Drokin, William Marone,
Javier Martinez Canillas
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.
The original author of this driver is: Kevin McNeely <kev@cypress.com>
Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
---
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/cyttsp/Kconfig | 21 +
drivers/staging/cyttsp/Makefile | 1 +
drivers/staging/cyttsp/cyttsp.h | 68 +++
drivers/staging/cyttsp/cyttsp_core.c | 757 ++++++++++++++++++++++++++++++++++
drivers/staging/cyttsp/cyttsp_core.h | 55 +++
7 files changed, 905 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/cyttsp/Kconfig
create mode 100644 drivers/staging/cyttsp/Makefile
create mode 100644 drivers/staging/cyttsp/cyttsp.h
create mode 100644 drivers/staging/cyttsp/cyttsp_core.c
create mode 100644 drivers/staging/cyttsp/cyttsp_core.h
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 06c9081..45bd09f 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -150,4 +150,6 @@ source "drivers/staging/mei/Kconfig"
source "drivers/staging/nvec/Kconfig"
+source "drivers/staging/cyttsp/Kconfig"
+
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index f3c5e33..b243448 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -66,3 +66,4 @@ obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += ste_rmi4/
obj-$(CONFIG_DRM_PSB) += gma500/
obj-$(CONFIG_INTEL_MEI) += mei/
obj-$(CONFIG_MFD_NVEC) += nvec/
+obj-$(TOUCHSCREEN_CYTTSP_CORE) += cyttsp/
diff --git a/drivers/staging/cyttsp/Kconfig b/drivers/staging/cyttsp/Kconfig
new file mode 100644
index 0000000..6849d3a
--- /dev/null
+++ b/drivers/staging/cyttsp/Kconfig
@@ -0,0 +1,21 @@
+config TOUCHSCREEN_CYTTSP_CORE
+ tristate "Cypress TTSP touchscreen core"
+ help
+ Say Y here if you have a Cypress TTSP touchscreen and want
+ built-in support for it.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cyttsp_core.
+
+ help
+ Say Y here if you have a Cypress TTSP touchscreen and want
+ help
+ Say Y here if you have a Cypress TTSP touchscreen and want
+ built-in support for it.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cyttsp_core.
diff --git a/drivers/staging/cyttsp/Makefile b/drivers/staging/cyttsp/Makefile
new file mode 100644
index 0000000..d1b250f
--- /dev/null
+++ b/drivers/staging/cyttsp/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
diff --git a/drivers/staging/cyttsp/cyttsp.h b/drivers/staging/cyttsp/cyttsp.h
new file mode 100644
index 0000000..3907bfc
--- /dev/null
+++ b/drivers/staging/cyttsp/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_ */
diff --git a/drivers/staging/cyttsp/cyttsp_core.c b/drivers/staging/cyttsp/cyttsp_core.c
new file mode 100644
index 0000000..2996959
--- /dev/null
+++ b/drivers/staging/cyttsp/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;
+} __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;
+} __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/staging/cyttsp/cyttsp_core.h b/drivers/staging/cyttsp/cyttsp_core.h
new file mode 100644
index 0000000..906ae82
--- /dev/null
+++ b/drivers/staging/cyttsp/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 "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__ */
--
1.7.4.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 2/3] staging: cyttsp: Add Cypress TTSP G3 I2C Device Driver
2011-07-28 10:27 staging: Add Cypress TTSP G3 support Javier Martinez Canillas
2011-07-28 10:27 ` [PATCH 1/3] staging: cyttsp: Add Cypress TTSP G3 Core Driver Javier Martinez Canillas
@ 2011-07-28 10:27 ` Javier Martinez Canillas
2011-07-28 10:27 ` [PATCH 3/3] staging: cyttsp: Add Cypress TTSP G3 SPI " Javier Martinez Canillas
2 siblings, 0 replies; 7+ messages in thread
From: Javier Martinez Canillas @ 2011-07-28 10:27 UTC (permalink / raw)
Cc: Kevin McNeely, devel, kernel-janitors, linux-input,
Steve Kolokowsky, rydberg, Oleg Drokin, William Marone,
Javier Martinez Canillas
Cypress TTSP Gen3 I2C Device Driver.
Provides i2c communications modules for the
Cypress TTSP Gen3 MTDEV Core Driver.
The original author of this driver is: Kevin McNeely <kev@cypress.com>
Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
---
drivers/staging/cyttsp/Kconfig | 12 +++
drivers/staging/cyttsp/Makefile | 1 +
drivers/staging/cyttsp/cyttsp_i2c.c | 188 +++++++++++++++++++++++++++++++++++
3 files changed, 201 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/cyttsp/cyttsp_i2c.c
diff --git a/drivers/staging/cyttsp/Kconfig b/drivers/staging/cyttsp/Kconfig
index 6849d3a..b1ffb2a 100644
--- a/drivers/staging/cyttsp/Kconfig
+++ b/drivers/staging/cyttsp/Kconfig
@@ -19,3 +19,15 @@ config TOUCHSCREEN_CYTTSP_CORE
To compile this driver as a module, choose M here: the
module will be called cyttsp_core.
+
+config TOUCHSCREEN_CYTTSP_I2C
+ tristate "Cypress TTSP i2c touchscreen"
+ depends on I2C && TOUCHSCREEN_CYTTSP_CORE
+ help
+ Say Y here if you have a Cypress TTSP touchscreen
+ connected to your system with an I2C interface.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cyttsp-i2c.
diff --git a/drivers/staging/cyttsp/Makefile b/drivers/staging/cyttsp/Makefile
index d1b250f..9101dc9 100644
--- a/drivers/staging/cyttsp/Makefile
+++ b/drivers/staging/cyttsp/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o
diff --git a/drivers/staging/cyttsp/cyttsp_i2c.c b/drivers/staging/cyttsp/cyttsp_i2c.c
new file mode 100644
index 0000000..d79c6a7
--- /dev/null
+++ b/drivers/staging/cyttsp/cyttsp_i2c.c
@@ -0,0 +1,188 @@
+/*
+ * Source for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
+ * 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/i2c.h>
+#include <linux/slab.h>
+
+#define CY_I2C_DATA_SIZE 128
+
+struct cyttsp_i2c {
+ struct cyttsp_bus_ops ops;
+ struct i2c_client *client;
+ void *ttsp_client;
+ u8 wr_buf[CY_I2C_DATA_SIZE];
+};
+
+static s32 ttsp_i2c_read_block_data(void *handle, u8 addr,
+ u8 length, void *values)
+{
+ struct cyttsp_i2c *ts = container_of(handle, struct cyttsp_i2c, ops);
+ int retval = 0;
+
+ retval = i2c_master_send(ts->client, &addr, 1);
+ if (retval < 0)
+ return retval;
+
+ retval = i2c_master_recv(ts->client, values, length);
+
+ return (retval < 0) ? retval : 0;
+}
+
+static s32 ttsp_i2c_write_block_data(void *handle, u8 addr,
+ u8 length, const void *values)
+{
+ struct cyttsp_i2c *ts = container_of(handle, struct cyttsp_i2c, ops);
+ int retval;
+
+ ts->wr_buf[0] = addr;
+ memcpy(&ts->wr_buf[1], values, length);
+
+ retval = i2c_master_send(ts->client, ts->wr_buf, length+1);
+
+ return (retval < 0) ? retval : 0;
+}
+
+static s32 ttsp_i2c_tch_ext(void *handle, void *values)
+{
+ struct cyttsp_i2c *ts = container_of(handle, struct cyttsp_i2c, ops);
+ int retval = 0;
+
+ /*
+ * TODO: Add custom touch extension handling code here
+ * set: retval < 0 for any returned system errors,
+ * retval = 0 if normal touch handling is required,
+ * retval > 0 if normal touch handling is *not* required
+ */
+ if (!ts || !values)
+ retval = -EINVAL;
+
+ return retval;
+}
+
+static int __devinit cyttsp_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cyttsp_i2c *ts;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -EIO;
+
+ /* allocate and clear memory */
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (!ts) {
+ dev_dbg(&client->dev, "%s: Error, kzalloc.\n", __func__);
+ return -ENOMEM;
+ }
+
+ /* register driver_data */
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+ ts->ops.write = ttsp_i2c_write_block_data;
+ ts->ops.read = ttsp_i2c_read_block_data;
+ ts->ops.ext = ttsp_i2c_tch_ext;
+ ts->ops.dev = &client->dev;
+ ts->ops.dev->bus = &i2c_bus_type;
+
+ ts->ttsp_client = cyttsp_core_init(&ts->ops, &client->dev);
+ if (IS_ERR(ts->ttsp_client)) {
+ int retval = PTR_ERR(ts->ttsp_client);
+ kfree(ts);
+ return retval;
+ }
+
+ dev_dbg(ts->ops.dev, "%s: Registration complete\n", __func__);
+
+ return 0;
+}
+
+
+/* registered in driver struct */
+static int __devexit cyttsp_i2c_remove(struct i2c_client *client)
+{
+ struct cyttsp_i2c *ts;
+
+ ts = i2c_get_clientdata(client);
+ cyttsp_core_release(ts->ttsp_client);
+ kfree(ts);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int cyttsp_i2c_suspend(struct i2c_client *client, pm_message_t message)
+{
+ struct cyttsp_i2c *ts = i2c_get_clientdata(client);
+
+ return cyttsp_suspend(ts->ttsp_client);
+}
+
+static int cyttsp_i2c_resume(struct i2c_client *client)
+{
+ struct cyttsp_i2c *ts = i2c_get_clientdata(client);
+
+ return cyttsp_resume(ts->ttsp_client);
+}
+#endif
+
+static const struct i2c_device_id cyttsp_i2c_id[] = {
+ { CY_I2C_NAME, 0 }, { }
+};
+
+static struct i2c_driver cyttsp_i2c_driver = {
+ .driver = {
+ .name = CY_I2C_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = cyttsp_i2c_probe,
+ .remove = __devexit_p(cyttsp_i2c_remove),
+ .id_table = cyttsp_i2c_id,
+#ifdef CONFIG_PM
+ .suspend = cyttsp_i2c_suspend,
+ .resume = cyttsp_i2c_resume,
+#endif
+};
+
+static int __init cyttsp_i2c_init(void)
+{
+ return i2c_add_driver(&cyttsp_i2c_driver);
+}
+
+static void __exit cyttsp_i2c_exit(void)
+{
+ return i2c_del_driver(&cyttsp_i2c_driver);
+}
+
+module_init(cyttsp_i2c_init);
+module_exit(cyttsp_i2c_exit);
+
+MODULE_ALIAS("i2c:cyttsp");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
+MODULE_AUTHOR("Cypress");
+MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
--
1.7.4.1
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 3/3] staging: cyttsp: Add Cypress TTSP G3 SPI Device Driver
2011-07-28 10:27 staging: Add Cypress TTSP G3 support Javier Martinez Canillas
2011-07-28 10:27 ` [PATCH 1/3] staging: cyttsp: Add Cypress TTSP G3 Core Driver Javier Martinez Canillas
2011-07-28 10:27 ` [PATCH 2/3] staging: cyttsp: Add Cypress TTSP G3 I2C Device Driver Javier Martinez Canillas
@ 2011-07-28 10:27 ` Javier Martinez Canillas
2011-07-28 10:53 ` walter harms
2 siblings, 1 reply; 7+ messages in thread
From: Javier Martinez Canillas @ 2011-07-28 10:27 UTC (permalink / raw)
Cc: Kevin McNeely, devel, kernel-janitors, linux-input,
Steve Kolokowsky, rydberg, Oleg Drokin, William Marone,
Javier Martinez Canillas
Cypress TTSP Gen3 SPI Device Driver.
Provides spi communications modules for the
Cypress TTSP Gen3 MTDEV Core Driver.
The original author of this driver is: Kevin McNeely <kev@cypress.com>
Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
---
drivers/staging/cyttsp/Kconfig | 12 ++
drivers/staging/cyttsp/Makefile | 1 +
drivers/staging/cyttsp/cyttsp_spi.c | 318 +++++++++++++++++++++++++++++++++++
3 files changed, 331 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/cyttsp/cyttsp_spi.c
diff --git a/drivers/staging/cyttsp/Kconfig b/drivers/staging/cyttsp/Kconfig
index b1ffb2a..cb661ca 100644
--- a/drivers/staging/cyttsp/Kconfig
+++ b/drivers/staging/cyttsp/Kconfig
@@ -31,3 +31,15 @@ config TOUCHSCREEN_CYTTSP_I2C
To compile this driver as a module, choose M here: the
module will be called cyttsp-i2c.
+
+config TOUCHSCREEN_CYTTSP_SPI
+ tristate "Cypress TTSP spi touchscreen"
+ depends on SPI_MASTER && TOUCHSCREEN_CYTTSP_CORE
+ help
+ Say Y here if you have a Cypress TTSP touchscreen
+ connected to your with an SPI interface.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cyttsp-spi.
diff --git a/drivers/staging/cyttsp/Makefile b/drivers/staging/cyttsp/Makefile
index 9101dc9..687eeaa 100644
--- a/drivers/staging/cyttsp/Makefile
+++ b/drivers/staging/cyttsp/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o
diff --git a/drivers/staging/cyttsp/cyttsp_spi.c b/drivers/staging/cyttsp/cyttsp_spi.c
new file mode 100644
index 0000000..108c37f
--- /dev/null
+++ b/drivers/staging/cyttsp/cyttsp_spi.c
@@ -0,0 +1,318 @@
+/*
+ * Source for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) SPI touchscreen driver.
+ * 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/spi/spi.h>
+#include <linux/delay.h>
+
+#define CY_SPI_WR_OP 0x00 /* r/~w */
+#define CY_SPI_RD_OP 0x01
+#define CY_SPI_CMD_BYTES 4
+#define CY_SPI_SYNC_BYTE 2
+#define CY_SPI_SYNC_ACK1 0x62 /* from protocol v.2 */
+#define CY_SPI_SYNC_ACK2 0x9D /* from protocol v.2 */
+#define CY_SPI_DATA_SIZE 128
+#define CY_SPI_DATA_BUF_SIZE (CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE)
+#define CY_SPI_BITS_PER_WORD 8
+
+struct cyttsp_spi {
+ struct cyttsp_bus_ops ops;
+ struct spi_device *spi_client;
+ void *ttsp_client;
+ u8 wr_buf[CY_SPI_DATA_BUF_SIZE];
+ u8 rd_buf[CY_SPI_DATA_BUF_SIZE];
+};
+
+static void spi_complete(void *arg)
+{
+ complete(arg);
+}
+
+static int spi_sync_tmo(struct cyttsp_spi *ts, struct spi_message *message)
+{
+ DECLARE_COMPLETION_ONSTACK(done);
+ int status;
+
+ message->complete = spi_complete;
+ message->context = &done;
+ status = spi_async(ts->spi_client, message);
+ if (status == 0) {
+ int ret = wait_for_completion_interruptible_timeout(&done, HZ);
+ if (!ret) {
+ dev_dbg(ts->ops.dev, "%s: timeout\n", __func__);
+ status = -EIO;
+ } else
+ status = message->status;
+ }
+ message->context = NULL;
+ return status;
+}
+
+static int cyttsp_spi_xfer_(u8 op, struct cyttsp_spi *ts,
+ u8 reg, u8 *buf, int length)
+{
+ struct spi_message msg;
+ struct spi_transfer xfer[2];
+ u8 *wr_buf = ts->wr_buf;
+ u8 *rd_buf = ts->rd_buf;
+ int retval;
+
+ if (length > CY_SPI_DATA_SIZE) {
+ dev_dbg(ts->ops.dev, "%s: length %d is too big.\n",
+ __func__, length);
+ return -EINVAL;
+ }
+
+ memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE);
+ memset(rd_buf, 0, CY_SPI_DATA_BUF_SIZE);
+
+ wr_buf[0] = 0x00; /* header byte 0 */
+ wr_buf[1] = 0xFF; /* header byte 1 */
+ wr_buf[2] = reg; /* reg index */
+ wr_buf[3] = op; /* r/~w */
+ if (op == CY_SPI_WR_OP)
+ memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length);
+
+ memset((void *)xfer, 0, sizeof(xfer));
+ spi_message_init(&msg);
+ xfer[0].tx_buf = wr_buf;
+ xfer[0].rx_buf = rd_buf;
+ if (op == CY_SPI_WR_OP) {
+ xfer[0].len = length + CY_SPI_CMD_BYTES;
+ spi_message_add_tail(&xfer[0], &msg);
+ } else if (op == CY_SPI_RD_OP) {
+ xfer[0].len = CY_SPI_CMD_BYTES;
+ spi_message_add_tail(&xfer[0], &msg);
+
+ xfer[1].rx_buf = buf;
+ xfer[1].len = length;
+ spi_message_add_tail(&xfer[1], &msg);
+ }
+
+ retval = spi_sync_tmo(ts, &msg);
+ if (retval < 0) {
+ dev_dbg(ts->ops.dev, "%s: spi sync error %d, len=%d, op=%d\n",
+ __func__, retval, xfer[1].len, op);
+ retval = 0;
+ }
+
+ if (op == CY_SPI_RD_OP) {
+ if ((rd_buf[CY_SPI_SYNC_BYTE] == CY_SPI_SYNC_ACK1) &&
+ (rd_buf[CY_SPI_SYNC_BYTE+1] == CY_SPI_SYNC_ACK2))
+ retval = 0;
+ else {
+ int i;
+ for (i = 0; i < (CY_SPI_CMD_BYTES); i++)
+ dev_dbg(ts->ops.dev,
+ "%s: test rd_buf[%d]:0x%02x\n",
+ __func__, i, rd_buf[i]);
+ for (i = 0; i < (length); i++)
+ dev_dbg(ts->ops.dev,
+ "%s: test buf[%d]:0x%02x\n",
+ __func__, i, buf[i]);
+ retval = 1;
+ }
+ }
+ return retval;
+}
+
+static int cyttsp_spi_xfer(u8 op, struct cyttsp_spi *ts,
+ u8 reg, u8 *buf, int length)
+{
+ int tries;
+ int retval;
+
+ if (op == CY_SPI_RD_OP) {
+ for (tries = CY_NUM_RETRY; tries; tries--) {
+ retval = cyttsp_spi_xfer_(op, ts, reg, buf, length);
+ if (retval == 0)
+ break;
+ else
+ msleep(20);
+ }
+ } else {
+ retval = cyttsp_spi_xfer_(op, ts, reg, buf, length);
+ }
+
+ return retval;
+}
+
+static s32 ttsp_spi_read_block_data(void *handle, u8 addr,
+ u8 length, void *data)
+{
+ struct cyttsp_spi *ts = container_of(handle, struct cyttsp_spi, ops);
+ int retval;
+
+ retval = cyttsp_spi_xfer(CY_SPI_RD_OP, ts, addr, data, length);
+ if (retval < 0)
+ dev_dbg(ts->ops.dev, "%s: ttsp_spi_read_block_data failed\n",
+ __func__);
+
+ /*
+ * Do not print the above error if the data sync bytes were not found.
+ * This is a normal condition for the bootloader loader startup and need
+ * to retry until data sync bytes are found.
+ */
+ if (retval > 0)
+ retval = -1; /* now signal fail; so retry can be done */
+
+ return retval;
+}
+
+static s32 ttsp_spi_write_block_data(void *handle, u8 addr,
+ u8 length, const void *data)
+{
+ struct cyttsp_spi *ts = container_of(handle, struct cyttsp_spi, ops);
+ int retval;
+
+ retval = cyttsp_spi_xfer(CY_SPI_WR_OP, ts, addr, (void *)data, length);
+ if (retval < 0)
+ dev_dbg(ts->ops.dev, "%s: ttsp_spi_write_block_data failed\n",
+ __func__);
+
+ if (retval == -EIO)
+ return 0;
+ else
+ return retval;
+}
+
+static s32 ttsp_spi_tch_ext(void *handle, void *values)
+{
+ struct cyttsp_spi *ts = container_of(handle, struct cyttsp_spi, ops);
+ int retval = 0;
+
+ /*
+ * TODO: Add custom touch extension handling code here
+ * set: retval < 0 for any returned system errors,
+ * retval = 0 if normal touch handling is required,
+ * retval > 0 if normal touch handling is *not* required
+ */
+
+ if (!ts || !values)
+ retval = -EINVAL;
+
+ return retval;
+}
+
+static int __devinit cyttsp_spi_probe(struct spi_device *spi)
+{
+ struct cyttsp_spi *ts;
+ int retval;
+
+ /* Set up SPI*/
+ spi->bits_per_word = CY_SPI_BITS_PER_WORD;
+ spi->mode = SPI_MODE_0;
+ retval = spi_setup(spi);
+ if (retval < 0) {
+ dev_dbg(&spi->dev, "%s: SPI setup error %d\n",
+ __func__, retval);
+ return retval;
+ }
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (!ts) {
+ dev_dbg(&spi->dev, "%s: Error, kzalloc\n", __func__);
+ return -ENOMEM;
+ }
+
+ ts->spi_client = spi;
+ dev_set_drvdata(&spi->dev, ts);
+ ts->ops.write = ttsp_spi_write_block_data;
+ ts->ops.read = ttsp_spi_read_block_data;
+ ts->ops.ext = ttsp_spi_tch_ext;
+ ts->ops.dev = &spi->dev;
+
+ ts->ttsp_client = cyttsp_core_init(&ts->ops, &spi->dev);
+ if (IS_ERR(ts->ttsp_client)) {
+ int retval = PTR_ERR(ts->ttsp_client);
+ kfree(ts);
+ return retval;
+ }
+
+ dev_dbg(ts->ops.dev, "%s: Registration complete\n", __func__);
+
+ return 0;
+}
+
+static int __devexit cyttsp_spi_remove(struct spi_device *spi)
+{
+ struct cyttsp_spi *ts = dev_get_drvdata(&spi->dev);
+
+ cyttsp_core_release(ts->ttsp_client);
+ kfree(ts);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int cyttsp_spi_suspend(struct spi_device *spi, pm_message_t message)
+{
+ struct cyttsp_spi *ts = dev_get_drvdata(&spi->dev);
+
+ return cyttsp_suspend(ts->ttsp_client);
+}
+
+static int cyttsp_spi_resume(struct spi_device *spi)
+{
+ struct cyttsp_spi *ts = dev_get_drvdata(&spi->dev);
+
+ return cyttsp_resume(ts->ttsp_client);
+}
+#endif
+
+static struct spi_driver cyttsp_spi_driver = {
+ .driver = {
+ .name = CY_SPI_NAME,
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = cyttsp_spi_probe,
+ .remove = __devexit_p(cyttsp_spi_remove),
+#ifdef CONFIG_PM
+ .suspend = cyttsp_spi_suspend,
+ .resume = cyttsp_spi_resume,
+#endif
+};
+
+static int __init cyttsp_spi_init(void)
+{
+ return spi_register_driver(&cyttsp_spi_driver);
+}
+module_init(cyttsp_spi_init);
+
+static void __exit cyttsp_spi_exit(void)
+{
+ spi_unregister_driver(&cyttsp_spi_driver);
+}
+module_exit(cyttsp_spi_exit);
+
+MODULE_ALIAS("spi:cyttsp");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) SPI driver");
+MODULE_AUTHOR("Cypress");
+
--
1.7.4.1
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