Index: git/drivers/input/touchscreen/Kconfig =================================================================== --- git.orig/drivers/input/touchscreen/Kconfig 2010-01-06 16:23:19.000000000 -0600 +++ git/drivers/input/touchscreen/Kconfig 2010-01-12 08:46:20.229418722 -0600 @@ -530,4 +530,17 @@ To compile this driver as a module, choose M here: the module will be called pcap_ts. + +config TOUCHSCREEN_TPS6507X + tristate "TPS6507x based touchscreens" + depends on I2C + help + Say Y here if you have a TPS6507x based touchscreen + controller. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called tps6507x_ts. + endif Index: git/drivers/input/touchscreen/Makefile =================================================================== --- git.orig/drivers/input/touchscreen/Makefile 2010-01-06 16:23:19.000000000 -0600 +++ git/drivers/input/touchscreen/Makefile 2010-01-12 08:46:57.705432438 -0600 @@ -42,3 +42,4 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o +obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o Index: git/drivers/input/touchscreen/tps6507x-ts.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ git/drivers/input/touchscreen/tps6507x-ts.c 2010-01-12 08:51:49.781765078 -0600 @@ -0,0 +1,403 @@ +/* + * drivers/input/touchscreen/tps6507x_ts.c + * + * Touchscreen driver for the tps6507x chip. + * + * Copyright (c) 2009 RidgeRun (todd.fischer@ridgerun.com) + * + * Credits: + * + * Using code from tsc2007, MtekVision Co., Ltd. + * + * For licencing details see kernel-base/COPYING + * + * TPS65070, TPS65073, TPS650731, and TPS650732 support + * 10 bit touch screen interface. + */ + +//#define DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include + +#define TSC_DEFAULT_POLL_PERIOD 30 /* ms */ +#define TPS_DEFAULT_MIN_PRESSURE 0x30 +#define MAX_10BIT ((1 << 10) - 1) + +#define TPS6507X_ADCONFIG_CONVERT_TS (TPS6507X_ADCONFIG_AD_ENABLE | \ + TPS6507X_ADCONFIG_START_CONVERSION | \ + TPS6507X_ADCONFIG_INPUT_REAL_TSC) +#define TPS6507X_ADCONFIG_POWER_DOWN_TS (TPS6507X_ADCONFIG_INPUT_REAL_TSC) + +struct ts_event { + u16 x; + u16 y; + u16 pressure; +}; + +struct tps6507x_ts { + struct input_dev *input_dev; + struct device *dev; + char phys[32]; + struct workqueue_struct *wq; + struct delayed_work work; + unsigned polling; /* polling is active */ + struct ts_event tc; + struct tps6507x_dev *mfd; + u16 model; + unsigned pendown; + int irq; + void (*clear_penirq)(void); + unsigned long poll_period; /* ms */ + u16 min_pressure; + int vref; /* non-zero to leave vref on */ +}; + +static int tps6507x_read_u8(struct tps6507x_ts *tsc, u8 reg, u8 *data) +{ + int err; + + err = tsc->mfd->read_dev(tsc->mfd, reg, 1, data); + + if (err) { + return err; + } + + return 0; +} + +static int tps6507x_write_u8(struct tps6507x_ts *tsc, u8 reg, u8 data) +{ + return tsc->mfd->write_dev(tsc->mfd, reg, 1, &data); +} + +static s32 tps6507x_adc_conversion(struct tps6507x_ts *tsc, + u8 tsc_mode, u16 *value) +{ + s32 ret; + u8 adc_status; + u8 result; + + /* Route input signal to A/D converter */ + + ret = tps6507x_write_u8(tsc, TPS6507X_REG_TSCMODE, tsc_mode); + if (ret) { + dev_err(tsc->dev, "TSC mode read failed\n"); + goto err; + } + + /* Start A/D conversion */ + + ret = tps6507x_write_u8(tsc, TPS6507X_REG_ADCONFIG, + TPS6507X_ADCONFIG_CONVERT_TS); + if (ret) { + dev_err(tsc->dev, "ADC config write failed\n"); + return ret; + } + + do { + ret = tps6507x_read_u8(tsc, TPS6507X_REG_ADCONFIG, + &adc_status); + if (ret) { + dev_err(tsc->dev, "ADC config read failed\n"); + goto err; + } + } while (adc_status & TPS6507X_ADCONFIG_START_CONVERSION); + + ret = tps6507x_read_u8(tsc, TPS6507X_REG_ADRESULT_2, &result); + if (ret) { + dev_err(tsc->dev, "ADC result 2 read failed\n"); + goto err; + } + + *value = (result & TPS6507X_REG_ADRESULT_2_MASK) << 8; + + ret = tps6507x_read_u8(tsc, TPS6507X_REG_ADRESULT_1, &result); + if (ret) { + dev_err(tsc->dev, "ADC result 1 read failed\n"); + goto err; + } + + *value |= result; + + dev_dbg(tsc->dev, "TSC channel %d = 0x%X\n", tsc_mode, *value); + +err: + return ret; +} + +/* Need to call tps6507x_adc_standby() after using A/D converter for the + * touch screen interrupt to work properly. + */ + +static s32 tps6507x_adc_standby(struct tps6507x_ts *tsc) +{ + s32 ret; + s32 loops = 0; + u8 val; + + ret = tps6507x_write_u8(tsc, TPS6507X_REG_ADCONFIG, + TPS6507X_ADCONFIG_INPUT_TSC); + if (ret) + return ret; + + ret = tps6507x_write_u8(tsc, TPS6507X_REG_TSCMODE, + TPS6507X_TSCMODE_STANDBY); + if (ret) + return ret; + + ret = tps6507x_read_u8(tsc, TPS6507X_REG_INT, &val); + if (ret) + return ret; + + while (val & TPS6507X_REG_TSC_INT) { + mdelay(10); + ret = tps6507x_read_u8(tsc, TPS6507X_REG_INT, &val); + if (ret) + return ret; + loops++; + } + + return ret; +} + +static void tps6507x_ts_handler(struct work_struct *work) +{ + struct tps6507x_ts *tsc = container_of(work, + struct tps6507x_ts, work.work); + struct input_dev *input_dev = tsc->input_dev; + int pendown; + int schd; + int poll = 0; + s32 ret; + + ret = tps6507x_adc_conversion(tsc, TPS6507X_TSCMODE_PRESSURE, + &tsc->tc.pressure); + if (ret) + goto done; + + pendown = tsc->tc.pressure > tsc->min_pressure; + + if (unlikely(!pendown && tsc->pendown)) { + dev_dbg(tsc->dev, "UP\n"); + input_report_key(input_dev, BTN_TOUCH, 0); + input_report_abs(input_dev, ABS_PRESSURE, 0); + input_sync(input_dev); + tsc->pendown = 0; + } + + if (pendown) { + + if (!tsc->pendown) { + dev_dbg(tsc->dev, "DOWN\n"); + input_report_key(input_dev, BTN_TOUCH, 1); + } else + dev_dbg(tsc->dev, "still down\n"); + + ret = tps6507x_adc_conversion(tsc, TPS6507X_TSCMODE_X_POSITION, + &tsc->tc.x); + if (ret) + goto done; + + ret = tps6507x_adc_conversion(tsc, TPS6507X_TSCMODE_Y_POSITION, + &tsc->tc.y); + if (ret) + goto done; + + input_report_abs(input_dev, ABS_X, tsc->tc.x); + input_report_abs(input_dev, ABS_Y, tsc->tc.y); + input_report_abs(input_dev, ABS_PRESSURE, tsc->tc.pressure); + input_sync(input_dev); + tsc->pendown = 1; + poll = 1; + } + + /* always poll if not using interrupts */ + poll = 1; + + if (poll) { + schd = queue_delayed_work(tsc->wq, &tsc->work, + tsc->poll_period * HZ / 1000); + if (schd) + tsc->polling = 1; + else { + tsc->polling = 0; + dev_err(tsc->dev, "re-schedule failed"); + } + } else + tsc->polling = 0; + +done: + ret = tps6507x_adc_standby(tsc); +} + +static int tps6507x_ts_probe(struct platform_device *pdev) +{ + int error; + struct tps6507x_ts *tsc; + struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev); + struct touchscreen_init_data *init_data; + struct input_dev *input_dev; + struct tps6507x_board *tps_board; + int schd; + + /** + * tps_board points to pmic related constants + * coming from the board-evm file. + */ + + tps_board = (struct tps6507x_board *)tps6507x_dev->dev->platform_data; + + if (!tps_board) { + dev_err(tps6507x_dev->dev, "Could not find tps6507x platform data\n"); + return -EIO; + } + + /** + * init_data points to array of regulator_init structures + * coming from the board-evm file. + */ + + init_data = tps_board->tps6507x_ts_init_data; + + tsc = kzalloc(sizeof(struct tps6507x_ts), GFP_KERNEL); + if (!tsc) { + dev_err(tps6507x_dev->dev, "failed to allocate driver data\n"); + error = -ENOMEM; + goto err0; + } + + tps6507x_dev->ts = tsc; + tsc->mfd = tps6507x_dev; + tsc->dev = tps6507x_dev->dev; + input_dev = input_allocate_device(); + if (!input_dev) { + dev_err(tsc->dev, "Failed to allocate input device.\n"); + error = -ENOMEM; + goto err1; + } + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + input_set_abs_params(input_dev, ABS_X, 0, MAX_10BIT, 0, 0); + input_set_abs_params(input_dev, ABS_Y, 0, MAX_10BIT, 0, 0); + input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_10BIT, 0, 0); + + input_dev->name = "TPS6507x Touchscreen"; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = tsc->dev; + + snprintf(tsc->phys, sizeof(tsc->phys), + "%s/input0", dev_name(tsc->dev)); + input_dev->phys = tsc->phys; + + dev_dbg(tsc->dev, "device: %s\n", input_dev->phys); + + input_set_drvdata(input_dev, tsc); + + tsc->input_dev = input_dev; + + INIT_DELAYED_WORK(&tsc->work, tps6507x_ts_handler); + tsc->wq = create_workqueue("TPS6507x Touchscreen"); + + if (init_data) { + tsc->poll_period = init_data->poll_period; + tsc->vref = init_data->vref; + tsc->min_pressure = init_data->min_pressure; + input_dev->id.vendor = init_data->vendor; + input_dev->id.product = init_data->product; + input_dev->id.version = init_data->version; + } else { + tsc->poll_period = TSC_DEFAULT_POLL_PERIOD; + tsc->min_pressure = TPS_DEFAULT_MIN_PRESSURE; + } + + error = tps6507x_adc_standby(tsc); + if (error) + goto err2; + + error = input_register_device(input_dev); + if (error) + goto err2; + + schd = queue_delayed_work(tsc->wq, &tsc->work, + tsc->poll_period * HZ / 1000); + + if (schd) + tsc->polling = 1; + else { + tsc->polling = 0; + dev_err(tsc->dev, "schedule failed"); + goto err2; + } + + return 0; + +err2: + cancel_delayed_work(&tsc->work); + flush_workqueue(tsc->wq); + destroy_workqueue(tsc->wq); + tsc->wq = 0; + input_free_device(input_dev); +err1: + kfree(tsc); + tps6507x_dev->ts = NULL; +err0: + return error; +} + +static int __devexit tps6507x_ts_remove(struct platform_device *pdev) +{ + struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev); + struct tps6507x_ts *tsc = tps6507x_dev->ts; + struct input_dev *input_dev = tsc->input_dev; + + if (! tsc) { + return 0; + } + + cancel_delayed_work(&tsc->work); + flush_workqueue(tsc->wq); + destroy_workqueue(tsc->wq); + tsc->wq = 0; + + input_free_device(input_dev); + + tps6507x_dev->ts = NULL; + kfree(tsc); + + return 0; +} + +static struct platform_driver tps6507x_ts_driver = { + .driver = { + .name = "tps6507x-ts", + .owner = THIS_MODULE, + }, + .probe = tps6507x_ts_probe, + .remove = __devexit_p(tps6507x_ts_remove), +}; + +static int __init tps6507x_ts_init(void) +{ + return platform_driver_register(&tps6507x_ts_driver); +} +module_init(tps6507x_ts_init); + +static void __exit tps6507x_ts_exit(void) +{ + platform_driver_unregister(&tps6507x_ts_driver); +} +module_exit(tps6507x_ts_exit); + +MODULE_AUTHOR("Todd Fischer "); +MODULE_DESCRIPTION("TPS6507x - TouchScreen driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:tps6507x-tsc"); Index: git/include/linux/i2c/tps6507x-ts.h =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ git/include/linux/i2c/tps6507x-ts.h 2010-01-12 08:46:00.745554017 -0600 @@ -0,0 +1,24 @@ +/* linux/i2c/tps6507x-ts.h + * + * Functions to access TPS65070 touch screen chip. + * + * Copyright (c) 2009 RidgeRun (todd.fischer@ridgerun.com) + * + * + * For licencing details see kernel-base/COPYING + */ + +#ifndef __LINUX_I2C_TPS6507X_TS_H +#define __LINUX_I2C_TPS6507X_TS_H + +/* Board specific touch screen initial values */ +struct touchscreen_init_data { + int poll_period; /* ms */ + int vref; /* non-zero to leave vref on */ + __u16 min_pressure; /* min reading to be treated as a touch */ + __u16 vendor; + __u16 product; + __u16 version; +}; + +#endif /* __LINUX_I2C_TPS6507X_TS_H */ Index: git/include/linux/mfd/tps6507x.h =================================================================== --- git.orig/include/linux/mfd/tps6507x.h 2010-01-12 08:43:01.000000000 -0600 +++ git/include/linux/mfd/tps6507x.h 2010-01-12 08:46:00.745554017 -0600 @@ -142,6 +142,7 @@ struct tps6507x_board { struct regulator_init_data *tps6507x_pmic_init_data; + struct touchscreen_init_data *tps6507x_ts_init_data; }; /** @@ -163,6 +164,7 @@ /* Client devices */ struct tps6507x_pmic *pmic; + struct tps6507x_ts *ts; }; #endif /* __LINUX_MFD_TPS6507X_H */ Index: git/arch/arm/mach-davinci/board-da850-evm.c =================================================================== --- git.orig/arch/arm/mach-davinci/board-da850-evm.c 2010-01-12 08:43:00.000000000 -0600 +++ git/arch/arm/mach-davinci/board-da850-evm.c 2010-01-12 08:47:55.901370217 -0600 @@ -25,6 +25,8 @@ #include #include #include +#include +#include #include #include #include @@ -644,8 +646,18 @@ }, }; +static struct touchscreen_init_data tps6507x_touchscreen_data = { + .poll_period = 30, /* ms between touch samples */ + .min_pressure = 0x30, /* Zoom touch screen */ + .vref = 0, /* turn off vref when not using A/D */ + .vendor = 0, /* /sys/class/input/input?/id/vendor */ + .product = 65070, /* /sys/class/input/input?/id/product */ + .version = 0x100, /* /sys/class/input/input?/id/version */ +}; + static struct tps6507x_board tps_board = { .tps6507x_pmic_init_data = &tps65070_regulator_data[0], + .tps6507x_ts_init_data = &tps6507x_touchscreen_data, }; static struct i2c_board_info __initdata da850evm_tps65070_info[] = { Index: git/drivers/mfd/tps6507x.c =================================================================== --- git.orig/drivers/mfd/tps6507x.c 2010-01-12 08:43:01.000000000 -0600 +++ git/drivers/mfd/tps6507x.c 2010-01-12 08:51:03.997870214 -0600 @@ -91,6 +91,8 @@ tps6507x_client_dev_register(tps6507x, "tps6507x-pmic", &pdev); + tps6507x_client_dev_register(tps6507x, "tps6507x-ts", + &pdev); return ret; } @@ -99,6 +101,7 @@ { struct tps6507x_dev *tps6507x; int ret = 0; + tps6507x = kzalloc(sizeof(struct tps6507x_dev), GFP_KERNEL); if (tps6507x == NULL) { kfree(i2c);