Input: add Cypress TTSP capacitive multi-touch screen support
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. Since the hardware is capable of tracking identifiable contacts, multi-touch protocol type B (stateful) is used to report contact information. 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. Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org> Reviewed-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Javier Martinez Canillas
Dmitry Torokhov
parent
31175a8348
commit
4065d1e7b2
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@ -139,7 +139,6 @@ config TOUCHSCREEN_CY8CTMG110
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tristate "cy8ctmg110 touchscreen"
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depends on I2C
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depends on GPIOLIB
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help
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Say Y here if you have a cy8ctmg110 capacitive touchscreen on
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an AAVA device.
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@ -149,6 +148,37 @@ config TOUCHSCREEN_CY8CTMG110
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To compile this driver as a module, choose M here: the
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module will be called cy8ctmg110_ts.
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config TOUCHSCREEN_CYTTSP_CORE
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tristate "Cypress TTSP touchscreen"
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help
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Say Y here if you have a touchscreen using controller from
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the Cypress TrueTouch(tm) Standard Product family connected
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to your system. You will also need to select appropriate
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bus connection below.
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If unsure, say N.
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To compile this driver as a module, choose M here: the
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module will be called cyttsp_core.
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config TOUCHSCREEN_CYTTSP_I2C
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tristate "support I2C bus connection"
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depends on TOUCHSCREEN_CYTTSP_CORE && I2C
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help
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Say Y here if the touchscreen is connected via I2C bus.
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To compile this driver as a module, choose M here: the
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module will be called cyttsp_i2c.
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config TOUCHSCREEN_CYTTSP_SPI
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tristate "support SPI bus connection"
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depends on TOUCHSCREEN_CYTTSP_CORE && SPI_MASTER
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help
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Say Y here if the touchscreen is connected via SPI bus.
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To compile this driver as a module, choose M here: the
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module will be called cyttsp_spi.
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config TOUCHSCREEN_DA9034
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tristate "Touchscreen support for Dialog Semiconductor DA9034"
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depends on PMIC_DA903X
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@ -16,8 +16,11 @@ obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT) += atmel_mxt_ts.o
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obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
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obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR) += auo-pixcir-ts.o
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obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
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obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
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obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
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obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
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obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
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obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o
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obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o
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obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o
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obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o
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obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o
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@ -0,0 +1,625 @@
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/*
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* Core Source for:
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* Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
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* For use with Cypress Txx3xx parts.
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* Supported parts include:
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* CY8CTST341
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* CY8CTMA340
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*
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* Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
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* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2, and only version 2, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
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*
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*/
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include "cyttsp_core.h"
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/* Bootloader number of command keys */
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#define CY_NUM_BL_KEYS 8
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/* helpers */
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#define GET_NUM_TOUCHES(x) ((x) & 0x0F)
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#define IS_LARGE_AREA(x) (((x) & 0x10) >> 4)
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#define IS_BAD_PKT(x) ((x) & 0x20)
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#define IS_VALID_APP(x) ((x) & 0x01)
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#define IS_OPERATIONAL_ERR(x) ((x) & 0x3F)
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#define GET_HSTMODE(reg) (((reg) & 0x70) >> 4)
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#define GET_BOOTLOADERMODE(reg) (((reg) & 0x10) >> 4)
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#define CY_REG_BASE 0x00
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#define CY_REG_ACT_DIST 0x1E
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#define CY_REG_ACT_INTRVL 0x1D
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#define CY_REG_TCH_TMOUT (CY_REG_ACT_INTRVL + 1)
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#define CY_REG_LP_INTRVL (CY_REG_TCH_TMOUT + 1)
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#define CY_MAXZ 255
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#define CY_DELAY_DFLT 20 /* ms */
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#define CY_DELAY_MAX 500
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#define CY_ACT_DIST_DFLT 0xF8
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#define CY_HNDSHK_BIT 0x80
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/* device mode bits */
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#define CY_OPERATE_MODE 0x00
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#define CY_SYSINFO_MODE 0x10
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/* power mode select bits */
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#define CY_SOFT_RESET_MODE 0x01 /* return to Bootloader mode */
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#define CY_DEEP_SLEEP_MODE 0x02
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#define CY_LOW_POWER_MODE 0x04
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/* Slots management */
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#define CY_MAX_FINGER 4
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#define CY_MAX_ID 16
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static const u8 bl_command[] = {
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0x00, /* file offset */
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0xFF, /* command */
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0xA5, /* exit bootloader command */
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0, 1, 2, 3, 4, 5, 6, 7 /* default keys */
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};
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static int ttsp_read_block_data(struct cyttsp *ts, u8 command,
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u8 length, void *buf)
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{
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int error;
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int tries;
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for (tries = 0; tries < CY_NUM_RETRY; tries++) {
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error = ts->bus_ops->read(ts, command, length, buf);
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if (!error)
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return 0;
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msleep(CY_DELAY_DFLT);
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}
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return -EIO;
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}
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static int ttsp_write_block_data(struct cyttsp *ts, u8 command,
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u8 length, void *buf)
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{
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int error;
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int tries;
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for (tries = 0; tries < CY_NUM_RETRY; tries++) {
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error = ts->bus_ops->write(ts, command, length, buf);
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if (!error)
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return 0;
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msleep(CY_DELAY_DFLT);
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}
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return -EIO;
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}
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static int ttsp_send_command(struct cyttsp *ts, u8 cmd)
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{
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return ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
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}
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static int cyttsp_load_bl_regs(struct cyttsp *ts)
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{
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memset(&ts->bl_data, 0, sizeof(ts->bl_data));
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ts->bl_data.bl_status = 0x10;
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return ttsp_read_block_data(ts, CY_REG_BASE,
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sizeof(ts->bl_data), &ts->bl_data);
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}
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static int cyttsp_exit_bl_mode(struct cyttsp *ts)
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{
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int error;
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u8 bl_cmd[sizeof(bl_command)];
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memcpy(bl_cmd, bl_command, sizeof(bl_command));
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if (ts->pdata->bl_keys)
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memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS],
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ts->pdata->bl_keys, sizeof(bl_command));
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error = ttsp_write_block_data(ts, CY_REG_BASE,
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sizeof(bl_cmd), bl_cmd);
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if (error)
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return error;
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/* wait for TTSP Device to complete the operation */
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msleep(CY_DELAY_DFLT);
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error = cyttsp_load_bl_regs(ts);
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if (error)
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return error;
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if (GET_BOOTLOADERMODE(ts->bl_data.bl_status))
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return -EIO;
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return 0;
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}
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static int cyttsp_set_operational_mode(struct cyttsp *ts)
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{
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int error;
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error = ttsp_send_command(ts, CY_OPERATE_MODE);
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if (error)
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return error;
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/* wait for TTSP Device to complete switch to Operational mode */
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error = ttsp_read_block_data(ts, CY_REG_BASE,
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sizeof(ts->xy_data), &ts->xy_data);
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if (error)
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return error;
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return ts->xy_data.act_dist == CY_ACT_DIST_DFLT ? -EIO : 0;
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}
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static int cyttsp_set_sysinfo_mode(struct cyttsp *ts)
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{
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int error;
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memset(&ts->sysinfo_data, 0, sizeof(ts->sysinfo_data));
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/* switch to sysinfo mode */
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error = ttsp_send_command(ts, CY_SYSINFO_MODE);
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if (error)
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return error;
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/* read sysinfo registers */
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msleep(CY_DELAY_DFLT);
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error = ttsp_read_block_data(ts, CY_REG_BASE, sizeof(ts->sysinfo_data),
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&ts->sysinfo_data);
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if (error)
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return error;
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if (!ts->sysinfo_data.tts_verh && !ts->sysinfo_data.tts_verl)
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return -EIO;
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return 0;
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}
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static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
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{
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int retval = 0;
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if (ts->pdata->act_intrvl != CY_ACT_INTRVL_DFLT ||
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ts->pdata->tch_tmout != CY_TCH_TMOUT_DFLT ||
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ts->pdata->lp_intrvl != CY_LP_INTRVL_DFLT) {
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u8 intrvl_ray[] = {
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ts->pdata->act_intrvl,
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ts->pdata->tch_tmout,
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ts->pdata->lp_intrvl
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};
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/* set intrvl registers */
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retval = ttsp_write_block_data(ts, CY_REG_ACT_INTRVL,
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sizeof(intrvl_ray), intrvl_ray);
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msleep(CY_DELAY_DFLT);
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}
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return retval;
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}
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static int cyttsp_soft_reset(struct cyttsp *ts)
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{
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unsigned long timeout;
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int retval;
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/* wait for interrupt to set ready completion */
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INIT_COMPLETION(ts->bl_ready);
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ts->state = CY_BL_STATE;
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enable_irq(ts->irq);
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retval = ttsp_send_command(ts, CY_SOFT_RESET_MODE);
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if (retval)
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goto out;
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timeout = wait_for_completion_timeout(&ts->bl_ready,
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msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX));
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retval = timeout ? 0 : -EIO;
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out:
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ts->state = CY_IDLE_STATE;
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disable_irq(ts->irq);
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return retval;
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}
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static int cyttsp_act_dist_setup(struct cyttsp *ts)
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{
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u8 act_dist_setup = ts->pdata->act_dist;
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/* Init gesture; active distance setup */
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return ttsp_write_block_data(ts, CY_REG_ACT_DIST,
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sizeof(act_dist_setup), &act_dist_setup);
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}
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static void cyttsp_extract_track_ids(struct cyttsp_xydata *xy_data, int *ids)
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{
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ids[0] = xy_data->touch12_id >> 4;
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ids[1] = xy_data->touch12_id & 0xF;
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ids[2] = xy_data->touch34_id >> 4;
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ids[3] = xy_data->touch34_id & 0xF;
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}
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static const struct cyttsp_tch *cyttsp_get_tch(struct cyttsp_xydata *xy_data,
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int idx)
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{
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switch (idx) {
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case 0:
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return &xy_data->tch1;
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case 1:
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return &xy_data->tch2;
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case 2:
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return &xy_data->tch3;
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case 3:
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return &xy_data->tch4;
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default:
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return NULL;
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}
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}
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static void cyttsp_report_tchdata(struct cyttsp *ts)
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{
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struct cyttsp_xydata *xy_data = &ts->xy_data;
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struct input_dev *input = ts->input;
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int num_tch = GET_NUM_TOUCHES(xy_data->tt_stat);
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const struct cyttsp_tch *tch;
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int ids[CY_MAX_ID];
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int i;
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DECLARE_BITMAP(used, CY_MAX_ID);
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if (IS_LARGE_AREA(xy_data->tt_stat) == 1) {
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/* terminate all active tracks */
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num_tch = 0;
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dev_dbg(ts->dev, "%s: Large area detected\n", __func__);
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} else if (num_tch > CY_MAX_FINGER) {
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/* terminate all active tracks */
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num_tch = 0;
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dev_dbg(ts->dev, "%s: Num touch error detected\n", __func__);
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} else if (IS_BAD_PKT(xy_data->tt_mode)) {
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/* terminate all active tracks */
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num_tch = 0;
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dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__);
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}
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cyttsp_extract_track_ids(xy_data, ids);
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bitmap_zero(used, CY_MAX_ID);
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for (i = 0; i < num_tch; i++) {
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tch = cyttsp_get_tch(xy_data, i);
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input_mt_slot(input, ids[i]);
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input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
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input_report_abs(input, ABS_MT_POSITION_X, be16_to_cpu(tch->x));
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input_report_abs(input, ABS_MT_POSITION_Y, be16_to_cpu(tch->y));
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input_report_abs(input, ABS_MT_TOUCH_MAJOR, tch->z);
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__set_bit(ids[i], used);
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}
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for (i = 0; i < CY_MAX_ID; i++) {
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if (test_bit(i, used))
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continue;
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input_mt_slot(input, i);
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input_mt_report_slot_state(input, MT_TOOL_FINGER, false);
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}
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input_sync(input);
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}
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static irqreturn_t cyttsp_irq(int irq, void *handle)
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{
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struct cyttsp *ts = handle;
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int error;
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if (unlikely(ts->state == CY_BL_STATE)) {
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complete(&ts->bl_ready);
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goto out;
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}
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/* Get touch data from CYTTSP device */
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error = ttsp_read_block_data(ts, CY_REG_BASE,
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sizeof(struct cyttsp_xydata), &ts->xy_data);
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if (error)
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goto out;
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/* provide flow control handshake */
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if (ts->pdata->use_hndshk) {
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error = ttsp_send_command(ts,
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ts->xy_data.hst_mode ^ CY_HNDSHK_BIT);
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if (error)
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goto out;
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}
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if (unlikely(ts->state == CY_IDLE_STATE))
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goto out;
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if (GET_BOOTLOADERMODE(ts->xy_data.tt_mode)) {
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/*
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* TTSP device has reset back to bootloader mode.
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* Restore to operational mode.
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*/
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error = cyttsp_exit_bl_mode(ts);
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if (error) {
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dev_err(ts->dev,
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"Could not return to operational mode, err: %d\n",
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error);
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ts->state = CY_IDLE_STATE;
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}
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} else {
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cyttsp_report_tchdata(ts);
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}
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out:
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return IRQ_HANDLED;
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}
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static int cyttsp_power_on(struct cyttsp *ts)
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{
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int error;
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error = cyttsp_soft_reset(ts);
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if (error)
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return error;
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error = cyttsp_load_bl_regs(ts);
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if (error)
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return error;
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if (GET_BOOTLOADERMODE(ts->bl_data.bl_status) &&
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IS_VALID_APP(ts->bl_data.bl_status)) {
|
||||
error = cyttsp_exit_bl_mode(ts);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
if (GET_HSTMODE(ts->bl_data.bl_file) != CY_OPERATE_MODE ||
|
||||
IS_OPERATIONAL_ERR(ts->bl_data.bl_status)) {
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
error = cyttsp_set_sysinfo_mode(ts);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = cyttsp_set_sysinfo_regs(ts);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = cyttsp_set_operational_mode(ts);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
/* init active distance */
|
||||
error = cyttsp_act_dist_setup(ts);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
ts->state = CY_ACTIVE_STATE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cyttsp_enable(struct cyttsp *ts)
|
||||
{
|
||||
int error;
|
||||
|
||||
/*
|
||||
* The device firmware can wake on an I2C or SPI memory slave
|
||||
* address match. So just reading a register is sufficient to
|
||||
* wake up the device. The first read attempt will fail but it
|
||||
* will wake it up making the second read attempt successful.
|
||||
*/
|
||||
error = ttsp_read_block_data(ts, CY_REG_BASE,
|
||||
sizeof(ts->xy_data), &ts->xy_data);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
if (GET_HSTMODE(ts->xy_data.hst_mode))
|
||||
return -EIO;
|
||||
|
||||
enable_irq(ts->irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cyttsp_disable(struct cyttsp *ts)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = ttsp_send_command(ts, CY_LOW_POWER_MODE);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
disable_irq(ts->irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int cyttsp_suspend(struct device *dev)
|
||||
{
|
||||
struct cyttsp *ts = dev_get_drvdata(dev);
|
||||
int retval = 0;
|
||||
|
||||
mutex_lock(&ts->input->mutex);
|
||||
|
||||
if (ts->input->users) {
|
||||
retval = cyttsp_disable(ts);
|
||||
if (retval == 0)
|
||||
ts->suspended = true;
|
||||
}
|
||||
|
||||
mutex_unlock(&ts->input->mutex);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int cyttsp_resume(struct device *dev)
|
||||
{
|
||||
struct cyttsp *ts = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&ts->input->mutex);
|
||||
|
||||
if (ts->input->users)
|
||||
cyttsp_enable(ts);
|
||||
|
||||
ts->suspended = false;
|
||||
|
||||
mutex_unlock(&ts->input->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
SIMPLE_DEV_PM_OPS(cyttsp_pm_ops, cyttsp_suspend, cyttsp_resume);
|
||||
EXPORT_SYMBOL_GPL(cyttsp_pm_ops);
|
||||
|
||||
static int cyttsp_open(struct input_dev *dev)
|
||||
{
|
||||
struct cyttsp *ts = input_get_drvdata(dev);
|
||||
int retval = 0;
|
||||
|
||||
if (!ts->suspended)
|
||||
retval = cyttsp_enable(ts);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static void cyttsp_close(struct input_dev *dev)
|
||||
{
|
||||
struct cyttsp *ts = input_get_drvdata(dev);
|
||||
|
||||
if (!ts->suspended)
|
||||
cyttsp_disable(ts);
|
||||
}
|
||||
|
||||
struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
|
||||
struct device *dev, int irq, size_t xfer_buf_size)
|
||||
{
|
||||
const struct cyttsp_platform_data *pdata = dev->platform_data;
|
||||
struct cyttsp *ts;
|
||||
struct input_dev *input_dev;
|
||||
int error;
|
||||
|
||||
if (!dev || !bus_ops || !pdata || !pdata->name || irq <= 0) {
|
||||
error = -EINVAL;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
ts = kzalloc(sizeof(*ts) + xfer_buf_size, GFP_KERNEL);
|
||||
input_dev = input_allocate_device();
|
||||
if (!ts || !input_dev) {
|
||||
error = -ENOMEM;
|
||||
goto err_free_mem;
|
||||
}
|
||||
|
||||
ts->dev = dev;
|
||||
ts->input = input_dev;
|
||||
ts->pdata = dev->platform_data;
|
||||
ts->bus_ops = bus_ops;
|
||||
ts->irq = irq;
|
||||
|
||||
init_completion(&ts->bl_ready);
|
||||
snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
|
||||
|
||||
if (pdata->init) {
|
||||
error = pdata->init();
|
||||
if (error) {
|
||||
dev_err(ts->dev, "platform init failed, err: %d\n",
|
||||
error);
|
||||
goto err_free_mem;
|
||||
}
|
||||
}
|
||||
|
||||
input_dev->name = pdata->name;
|
||||
input_dev->phys = ts->phys;
|
||||
input_dev->id.bustype = bus_ops->bustype;
|
||||
input_dev->dev.parent = ts->dev;
|
||||
|
||||
input_dev->open = cyttsp_open;
|
||||
input_dev->close = cyttsp_close;
|
||||
|
||||
input_set_drvdata(input_dev, ts);
|
||||
|
||||
__set_bit(EV_ABS, input_dev->evbit);
|
||||
input_set_abs_params(input_dev, ABS_MT_POSITION_X,
|
||||
0, pdata->maxx, 0, 0);
|
||||
input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
|
||||
0, pdata->maxy, 0, 0);
|
||||
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
|
||||
0, CY_MAXZ, 0, 0);
|
||||
|
||||
input_mt_init_slots(input_dev, CY_MAX_ID);
|
||||
|
||||
error = request_threaded_irq(ts->irq, NULL, cyttsp_irq,
|
||||
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
||||
pdata->name, ts);
|
||||
if (error) {
|
||||
dev_err(ts->dev, "failed to request IRQ %d, err: %d\n",
|
||||
ts->irq, error);
|
||||
goto err_platform_exit;
|
||||
}
|
||||
|
||||
disable_irq(ts->irq);
|
||||
|
||||
error = cyttsp_power_on(ts);
|
||||
if (error)
|
||||
goto err_free_irq;
|
||||
|
||||
error = input_register_device(input_dev);
|
||||
if (error) {
|
||||
dev_err(ts->dev, "failed to register input device: %d\n",
|
||||
error);
|
||||
goto err_free_irq;
|
||||
}
|
||||
|
||||
return ts;
|
||||
|
||||
err_free_irq:
|
||||
free_irq(ts->irq, ts);
|
||||
err_platform_exit:
|
||||
if (pdata->exit)
|
||||
pdata->exit();
|
||||
err_free_mem:
|
||||
input_free_device(input_dev);
|
||||
kfree(ts);
|
||||
err_out:
|
||||
return ERR_PTR(error);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(cyttsp_probe);
|
||||
|
||||
void cyttsp_remove(struct cyttsp *ts)
|
||||
{
|
||||
free_irq(ts->irq, ts);
|
||||
input_unregister_device(ts->input);
|
||||
if (ts->pdata->exit)
|
||||
ts->pdata->exit();
|
||||
kfree(ts);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(cyttsp_remove);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
|
||||
MODULE_AUTHOR("Cypress");
|
||||
|
|
@ -0,0 +1,149 @@
|
|||
/*
|
||||
* 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.
|
||||
* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
|
||||
*
|
||||
* 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/types.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/input/cyttsp.h>
|
||||
|
||||
#define CY_NUM_RETRY 16 /* max number of retries for read ops */
|
||||
|
||||
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 cyttsp_bus_ops {
|
||||
u16 bustype;
|
||||
int (*write)(struct cyttsp *ts,
|
||||
u8 addr, u8 length, const void *values);
|
||||
int (*read)(struct cyttsp *ts, u8 addr, u8 length, void *values);
|
||||
};
|
||||
|
||||
enum cyttsp_state {
|
||||
CY_IDLE_STATE,
|
||||
CY_ACTIVE_STATE,
|
||||
CY_BL_STATE,
|
||||
};
|
||||
|
||||
struct cyttsp {
|
||||
struct device *dev;
|
||||
int irq;
|
||||
struct input_dev *input;
|
||||
char phys[32];
|
||||
const struct cyttsp_platform_data *pdata;
|
||||
const struct cyttsp_bus_ops *bus_ops;
|
||||
struct cyttsp_bootloader_data bl_data;
|
||||
struct cyttsp_sysinfo_data sysinfo_data;
|
||||
struct cyttsp_xydata xy_data;
|
||||
struct completion bl_ready;
|
||||
enum cyttsp_state state;
|
||||
bool suspended;
|
||||
|
||||
u8 xfer_buf[] ____cacheline_aligned;
|
||||
};
|
||||
|
||||
struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
|
||||
struct device *dev, int irq, size_t xfer_buf_size);
|
||||
void cyttsp_remove(struct cyttsp *ts);
|
||||
|
||||
extern const struct dev_pm_ops cyttsp_pm_ops;
|
||||
|
||||
#endif /* __CYTTSP_CORE_H__ */
|
||||
|
|
@ -0,0 +1,146 @@
|
|||
/*
|
||||
* 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.
|
||||
* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
|
||||
*
|
||||
* 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/input.h>
|
||||
|
||||
#define CY_I2C_DATA_SIZE 128
|
||||
|
||||
static int cyttsp_i2c_read_block_data(struct cyttsp *ts,
|
||||
u8 addr, u8 length, void *values)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(ts->dev);
|
||||
struct i2c_msg msgs[] = {
|
||||
{
|
||||
.addr = client->addr,
|
||||
.flags = 0,
|
||||
.len = 1,
|
||||
.buf = &addr,
|
||||
},
|
||||
{
|
||||
.addr = client->addr,
|
||||
.flags = I2C_M_RD,
|
||||
.len = length,
|
||||
.buf = values,
|
||||
},
|
||||
};
|
||||
int retval;
|
||||
|
||||
retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
|
||||
}
|
||||
|
||||
static int cyttsp_i2c_write_block_data(struct cyttsp *ts,
|
||||
u8 addr, u8 length, const void *values)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(ts->dev);
|
||||
int retval;
|
||||
|
||||
ts->xfer_buf[0] = addr;
|
||||
memcpy(&ts->xfer_buf[1], values, length);
|
||||
|
||||
retval = i2c_master_send(client, ts->xfer_buf, length + 1);
|
||||
|
||||
return retval < 0 ? retval : 0;
|
||||
}
|
||||
|
||||
static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
|
||||
.bustype = BUS_I2C,
|
||||
.write = cyttsp_i2c_write_block_data,
|
||||
.read = cyttsp_i2c_read_block_data,
|
||||
};
|
||||
|
||||
static int __devinit cyttsp_i2c_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct cyttsp *ts;
|
||||
|
||||
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
||||
dev_err(&client->dev, "I2C functionality not Supported\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
|
||||
CY_I2C_DATA_SIZE);
|
||||
|
||||
if (IS_ERR(ts))
|
||||
return PTR_ERR(ts);
|
||||
|
||||
i2c_set_clientdata(client, ts);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devexit cyttsp_i2c_remove(struct i2c_client *client)
|
||||
{
|
||||
struct cyttsp *ts = i2c_get_clientdata(client);
|
||||
|
||||
cyttsp_remove(ts);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id cyttsp_i2c_id[] = {
|
||||
{ CY_I2C_NAME, 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
|
||||
|
||||
static struct i2c_driver cyttsp_i2c_driver = {
|
||||
.driver = {
|
||||
.name = CY_I2C_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &cyttsp_pm_ops,
|
||||
},
|
||||
.probe = cyttsp_i2c_probe,
|
||||
.remove = __devexit_p(cyttsp_i2c_remove),
|
||||
.id_table = cyttsp_i2c_id,
|
||||
};
|
||||
|
||||
static int __init cyttsp_i2c_init(void)
|
||||
{
|
||||
return i2c_add_driver(&cyttsp_i2c_driver);
|
||||
}
|
||||
module_init(cyttsp_i2c_init);
|
||||
|
||||
static void __exit cyttsp_i2c_exit(void)
|
||||
{
|
||||
return i2c_del_driver(&cyttsp_i2c_driver);
|
||||
}
|
||||
module_exit(cyttsp_i2c_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
|
||||
MODULE_AUTHOR("Cypress");
|
||||
MODULE_ALIAS("i2c:cyttsp");
|
||||
|
|
@ -0,0 +1,210 @@
|
|||
/*
|
||||
* 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.
|
||||
* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
|
||||
*
|
||||
* 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/spi/spi.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
|
||||
|
||||
static int cyttsp_spi_xfer(struct cyttsp *ts,
|
||||
u8 op, u8 reg, u8 *buf, int length)
|
||||
{
|
||||
struct spi_device *spi = to_spi_device(ts->dev);
|
||||
struct spi_message msg;
|
||||
struct spi_transfer xfer[2];
|
||||
u8 *wr_buf = &ts->xfer_buf[0];
|
||||
u8 *rd_buf = &ts->xfer_buf[CY_SPI_DATA_BUF_SIZE];
|
||||
int retval;
|
||||
int i;
|
||||
|
||||
if (length > CY_SPI_DATA_SIZE) {
|
||||
dev_err(ts->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(xfer, 0, sizeof(xfer));
|
||||
spi_message_init(&msg);
|
||||
|
||||
/*
|
||||
We set both TX and RX buffers because Cypress TTSP
|
||||
requires full duplex operation.
|
||||
*/
|
||||
xfer[0].tx_buf = wr_buf;
|
||||
xfer[0].rx_buf = rd_buf;
|
||||
switch (op) {
|
||||
case CY_SPI_WR_OP:
|
||||
xfer[0].len = length + CY_SPI_CMD_BYTES;
|
||||
spi_message_add_tail(&xfer[0], &msg);
|
||||
break;
|
||||
|
||||
case 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);
|
||||
break;
|
||||
|
||||
default:
|
||||
dev_err(ts->dev, "%s: bad operation code=%d\n", __func__, op);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
retval = spi_sync(spi, &msg);
|
||||
if (retval < 0) {
|
||||
dev_dbg(ts->dev, "%s: spi_sync() error %d, len=%d, op=%d\n",
|
||||
__func__, retval, xfer[1].len, op);
|
||||
|
||||
/*
|
||||
* do not return here since was a bad ACK sequence
|
||||
* let the following ACK check handle any errors and
|
||||
* allow silent retries
|
||||
*/
|
||||
}
|
||||
|
||||
if (rd_buf[CY_SPI_SYNC_BYTE] != CY_SPI_SYNC_ACK1 ||
|
||||
rd_buf[CY_SPI_SYNC_BYTE + 1] != CY_SPI_SYNC_ACK2) {
|
||||
|
||||
dev_dbg(ts->dev, "%s: operation %d failed\n", __func__, op);
|
||||
|
||||
for (i = 0; i < CY_SPI_CMD_BYTES; i++)
|
||||
dev_dbg(ts->dev, "%s: test rd_buf[%d]:0x%02x\n",
|
||||
__func__, i, rd_buf[i]);
|
||||
for (i = 0; i < length; i++)
|
||||
dev_dbg(ts->dev, "%s: test buf[%d]:0x%02x\n",
|
||||
__func__, i, buf[i]);
|
||||
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cyttsp_spi_read_block_data(struct cyttsp *ts,
|
||||
u8 addr, u8 length, void *data)
|
||||
{
|
||||
return cyttsp_spi_xfer(ts, CY_SPI_RD_OP, addr, data, length);
|
||||
}
|
||||
|
||||
static int cyttsp_spi_write_block_data(struct cyttsp *ts,
|
||||
u8 addr, u8 length, const void *data)
|
||||
{
|
||||
return cyttsp_spi_xfer(ts, CY_SPI_WR_OP, addr, (void *)data, length);
|
||||
}
|
||||
|
||||
static const struct cyttsp_bus_ops cyttsp_spi_bus_ops = {
|
||||
.bustype = BUS_SPI,
|
||||
.write = cyttsp_spi_write_block_data,
|
||||
.read = cyttsp_spi_read_block_data,
|
||||
};
|
||||
|
||||
static int __devinit cyttsp_spi_probe(struct spi_device *spi)
|
||||
{
|
||||
struct cyttsp *ts;
|
||||
int error;
|
||||
|
||||
/* Set up SPI*/
|
||||
spi->bits_per_word = CY_SPI_BITS_PER_WORD;
|
||||
spi->mode = SPI_MODE_0;
|
||||
error = spi_setup(spi);
|
||||
if (error < 0) {
|
||||
dev_err(&spi->dev, "%s: SPI setup error %d\n",
|
||||
__func__, error);
|
||||
return error;
|
||||
}
|
||||
|
||||
ts = cyttsp_probe(&cyttsp_spi_bus_ops, &spi->dev, spi->irq,
|
||||
CY_SPI_DATA_BUF_SIZE * 2);
|
||||
if (IS_ERR(ts))
|
||||
return PTR_ERR(ts);
|
||||
|
||||
spi_set_drvdata(spi, ts);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devexit cyttsp_spi_remove(struct spi_device *spi)
|
||||
{
|
||||
struct cyttsp *ts = spi_get_drvdata(spi);
|
||||
|
||||
cyttsp_remove(ts);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct spi_driver cyttsp_spi_driver = {
|
||||
.driver = {
|
||||
.name = CY_SPI_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &cyttsp_pm_ops,
|
||||
},
|
||||
.probe = cyttsp_spi_probe,
|
||||
.remove = __devexit_p(cyttsp_spi_remove),
|
||||
};
|
||||
|
||||
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");
|
||||
MODULE_ALIAS("spi:cyttsp");
|
||||
|
|
@ -0,0 +1,58 @@
|
|||
/*
|
||||
* 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.
|
||||
* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
|
||||
*
|
||||
* 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 */
|
||||
|
||||
struct cyttsp_platform_data {
|
||||
u32 maxx;
|
||||
u32 maxy;
|
||||
bool use_hndshk;
|
||||
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 (*init)(void);
|
||||
void (*exit)(void);
|
||||
char *name;
|
||||
s16 irq_gpio;
|
||||
u8 *bl_keys;
|
||||
};
|
||||
|
||||
#endif /* _CYTTSP_H_ */
|
||||
Loading…
Reference in New Issue