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 <[email protected]> Signed-off-by: Javier Martinez Canillas <[email protected]> --- 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 ([email protected]) + * + */ +#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 <[email protected]> + * + */ + +#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 <[email protected]> + * + */ + + +#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 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
