summaryrefslogtreecommitdiffstats
path: root/drivers/input
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-12 10:01:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-12 10:01:06 -0700
commite83ddb335468cdd9ea6e9767eb30b64d8ff176ce (patch)
treeaf7ca0b5be74b713970149efaebe682596523252 /drivers/input
parent14a4fa20a10d76eb98b7feb25be60735217929ba (diff)
parentd0a11693967295772d2a7c22b6b37eb20684e709 (diff)
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (40 commits) mfd: Fix incorrect kfree(i2c) in wm8994-core i2c_driver probe mfd: Fix incorrect kfree(i2c) in wm831x-core i2c_driver probe mfd: Fix incorrect kfree(i2c) in tps6507x i2c_driver probe mfd: Add TPS6586x driver mfd: Use macros instead of some constant magic numbers for menelaus mfd: Fix menelaus mmc slot 2 misconfiguration mfd: Missing slab.h includes mfd: Fix wrong wm8350-core kfree in error path mfd: Fix wm8994_device_init() return value mfd: Avoid calling platform_device_put() twice in ucb1400 probe error path mfd: Annotate tc6387xb probe/remove routines with __devinit/__devexit mfd: Fix tc6387xb resource reclaim mfd: Fix wrong goto labels for tc6393xb error handling mfd: Get rid of now unused mc13783 private header hwmon: Don't access struct mc13783 directly from mc13783-adc mfd: New mc13783 function exposing flags mfd: Check jz4740-adc kmalloc() result mfd: Fix jz4740-adc resource reclaim in probe error path mfd: Add WM8321 support mfd: Add stmpe auto sleep feature ...
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/keyboard/Kconfig10
-rw-r--r--drivers/input/keyboard/Makefile1
-rw-r--r--drivers/input/keyboard/stmpe-keypad.c386
-rw-r--r--drivers/input/touchscreen/Kconfig10
-rw-r--r--drivers/input/touchscreen/Makefile1
-rw-r--r--drivers/input/touchscreen/stmpe-ts.c397
6 files changed, 805 insertions, 0 deletions
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index b171f63fe4d..9cc488d2149 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -395,6 +395,16 @@ config KEYBOARD_SH_KEYSC
To compile this driver as a module, choose M here: the
module will be called sh_keysc.
+config KEYBOARD_STMPE
+ tristate "STMPE keypad support"
+ depends on MFD_STMPE
+ help
+ Say Y here if you want to use the keypad controller on STMPE I/O
+ expanders.
+
+ To compile this driver as a module, choose M here: the module will be
+ called stmpe-keypad.
+
config KEYBOARD_DAVINCI
tristate "TI DaVinci Key Scan"
depends on ARCH_DAVINCI_DM365
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 1a66d5f1ca8..504b591be0c 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
+obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o
obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
diff --git a/drivers/input/keyboard/stmpe-keypad.c b/drivers/input/keyboard/stmpe-keypad.c
new file mode 100644
index 00000000000..ab7610ca10e
--- /dev/null
+++ b/drivers/input/keyboard/stmpe-keypad.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/mfd/stmpe.h>
+
+/* These are at the same addresses in all STMPE variants */
+#define STMPE_KPC_COL 0x60
+#define STMPE_KPC_ROW_MSB 0x61
+#define STMPE_KPC_ROW_LSB 0x62
+#define STMPE_KPC_CTRL_MSB 0x63
+#define STMPE_KPC_CTRL_LSB 0x64
+#define STMPE_KPC_COMBI_KEY_0 0x65
+#define STMPE_KPC_COMBI_KEY_1 0x66
+#define STMPE_KPC_COMBI_KEY_2 0x67
+#define STMPE_KPC_DATA_BYTE0 0x68
+#define STMPE_KPC_DATA_BYTE1 0x69
+#define STMPE_KPC_DATA_BYTE2 0x6a
+#define STMPE_KPC_DATA_BYTE3 0x6b
+#define STMPE_KPC_DATA_BYTE4 0x6c
+
+#define STMPE_KPC_CTRL_LSB_SCAN (0x1 << 0)
+#define STMPE_KPC_CTRL_LSB_DEBOUNCE (0x7f << 1)
+#define STMPE_KPC_CTRL_MSB_SCAN_COUNT (0xf << 4)
+
+#define STMPE_KPC_ROW_MSB_ROWS 0xff
+
+#define STMPE_KPC_DATA_UP (0x1 << 7)
+#define STMPE_KPC_DATA_ROW (0xf << 3)
+#define STMPE_KPC_DATA_COL (0x7 << 0)
+#define STMPE_KPC_DATA_NOKEY_MASK 0x78
+
+#define STMPE_KEYPAD_MAX_DEBOUNCE 127
+#define STMPE_KEYPAD_MAX_SCAN_COUNT 15
+
+#define STMPE_KEYPAD_MAX_ROWS 8
+#define STMPE_KEYPAD_MAX_COLS 8
+#define STMPE_KEYPAD_ROW_SHIFT 3
+#define STMPE_KEYPAD_KEYMAP_SIZE \
+ (STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS)
+
+/**
+ * struct stmpe_keypad_variant - model-specific attributes
+ * @auto_increment: whether the KPC_DATA_BYTE register address
+ * auto-increments on multiple read
+ * @num_data: number of data bytes
+ * @num_normal_data: number of normal keys' data bytes
+ * @max_cols: maximum number of columns supported
+ * @max_rows: maximum number of rows supported
+ * @col_gpios: bitmask of gpios which can be used for columns
+ * @row_gpios: bitmask of gpios which can be used for rows
+ */
+struct stmpe_keypad_variant {
+ bool auto_increment;
+ int num_data;
+ int num_normal_data;
+ int max_cols;
+ int max_rows;
+ unsigned int col_gpios;
+ unsigned int row_gpios;
+};
+
+static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
+ [STMPE1601] = {
+ .auto_increment = true,
+ .num_data = 5,
+ .num_normal_data = 3,
+ .max_cols = 8,
+ .max_rows = 8,
+ .col_gpios = 0x000ff, /* GPIO 0 - 7 */
+ .row_gpios = 0x0ff00, /* GPIO 8 - 15 */
+ },
+ [STMPE2401] = {
+ .auto_increment = false,
+ .num_data = 3,
+ .num_normal_data = 2,
+ .max_cols = 8,
+ .max_rows = 12,
+ .col_gpios = 0x0000ff, /* GPIO 0 - 7*/
+ .row_gpios = 0x1fef00, /* GPIO 8-14, 16-20 */
+ },
+ [STMPE2403] = {
+ .auto_increment = true,
+ .num_data = 5,
+ .num_normal_data = 3,
+ .max_cols = 8,
+ .max_rows = 12,
+ .col_gpios = 0x0000ff, /* GPIO 0 - 7*/
+ .row_gpios = 0x1fef00, /* GPIO 8-14, 16-20 */
+ },
+};
+
+struct stmpe_keypad {
+ struct stmpe *stmpe;
+ struct input_dev *input;
+ const struct stmpe_keypad_variant *variant;
+ const struct stmpe_keypad_platform_data *plat;
+
+ unsigned int rows;
+ unsigned int cols;
+
+ unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE];
+};
+
+static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
+{
+ const struct stmpe_keypad_variant *variant = keypad->variant;
+ struct stmpe *stmpe = keypad->stmpe;
+ int ret;
+ int i;
+
+ if (variant->auto_increment)
+ return stmpe_block_read(stmpe, STMPE_KPC_DATA_BYTE0,
+ variant->num_data, data);
+
+ for (i = 0; i < variant->num_data; i++) {
+ ret = stmpe_reg_read(stmpe, STMPE_KPC_DATA_BYTE0 + i);
+ if (ret < 0)
+ return ret;
+
+ data[i] = ret;
+ }
+
+ return 0;
+}
+
+static irqreturn_t stmpe_keypad_irq(int irq, void *dev)
+{
+ struct stmpe_keypad *keypad = dev;
+ struct input_dev *input = keypad->input;
+ const struct stmpe_keypad_variant *variant = keypad->variant;
+ u8 fifo[variant->num_data];
+ int ret;
+ int i;
+
+ ret = stmpe_keypad_read_data(keypad, fifo);
+ if (ret < 0)
+ return IRQ_NONE;
+
+ for (i = 0; i < variant->num_normal_data; i++) {
+ u8 data = fifo[i];
+ int row = (data & STMPE_KPC_DATA_ROW) >> 3;
+ int col = data & STMPE_KPC_DATA_COL;
+ int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT);
+ bool up = data & STMPE_KPC_DATA_UP;
+
+ if ((data & STMPE_KPC_DATA_NOKEY_MASK)
+ == STMPE_KPC_DATA_NOKEY_MASK)
+ continue;
+
+ input_event(input, EV_MSC, MSC_SCAN, code);
+ input_report_key(input, keypad->keymap[code], !up);
+ input_sync(input);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad)
+{
+ const struct stmpe_keypad_variant *variant = keypad->variant;
+ unsigned int col_gpios = variant->col_gpios;
+ unsigned int row_gpios = variant->row_gpios;
+ struct stmpe *stmpe = keypad->stmpe;
+ unsigned int pins = 0;
+ int i;
+
+ /*
+ * Figure out which pins need to be set to the keypad alternate
+ * function.
+ *
+ * {cols,rows}_gpios are bitmasks of which pins on the chip can be used
+ * for the keypad.
+ *
+ * keypad->{cols,rows} are a bitmask of which pins (of the ones useable
+ * for the keypad) are used on the board.
+ */
+
+ for (i = 0; i < variant->max_cols; i++) {
+ int num = __ffs(col_gpios);
+
+ if (keypad->cols & (1 << i))
+ pins |= 1 << num;
+
+ col_gpios &= ~(1 << num);
+ }
+
+ for (i = 0; i < variant->max_rows; i++) {
+ int num = __ffs(row_gpios);
+
+ if (keypad->rows & (1 << i))
+ pins |= 1 << num;
+
+ row_gpios &= ~(1 << num);
+ }
+
+ return stmpe_set_altfunc(stmpe, pins, STMPE_BLOCK_KEYPAD);
+}
+
+static int __devinit stmpe_keypad_chip_init(struct stmpe_keypad *keypad)
+{
+ const struct stmpe_keypad_platform_data *plat = keypad->plat;
+ const struct stmpe_keypad_variant *variant = keypad->variant;
+ struct stmpe *stmpe = keypad->stmpe;
+ int ret;
+
+ if (plat->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)
+ return -EINVAL;
+
+ if (plat->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)
+ return -EINVAL;
+
+ ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD);
+ if (ret < 0)
+ return ret;
+
+ ret = stmpe_keypad_altfunc_init(keypad);
+ if (ret < 0)
+ return ret;
+
+ ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols);
+ if (ret < 0)
+ return ret;
+
+ ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows);
+ if (ret < 0)
+ return ret;
+
+ if (variant->max_rows > 8) {
+ ret = stmpe_set_bits(stmpe, STMPE_KPC_ROW_MSB,
+ STMPE_KPC_ROW_MSB_ROWS,
+ keypad->rows >> 8);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB,
+ STMPE_KPC_CTRL_MSB_SCAN_COUNT,
+ plat->scan_count << 4);
+ if (ret < 0)
+ return ret;
+
+ return stmpe_set_bits(stmpe, STMPE_KPC_CTRL_LSB,
+ STMPE_KPC_CTRL_LSB_SCAN |
+ STMPE_KPC_CTRL_LSB_DEBOUNCE,
+ STMPE_KPC_CTRL_LSB_SCAN |
+ (plat->debounce_ms << 1));
+}
+
+static int __devinit stmpe_keypad_probe(struct platform_device *pdev)
+{
+ struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
+ struct stmpe_keypad_platform_data *plat;
+ struct stmpe_keypad *keypad;
+ struct input_dev *input;
+ int ret;
+ int irq;
+ int i;
+
+ plat = stmpe->pdata->keypad;
+ if (!plat)
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ keypad = kzalloc(sizeof(struct stmpe_keypad), GFP_KERNEL);
+ if (!keypad)
+ return -ENOMEM;
+
+ input = input_allocate_device();
+ if (!input) {
+ ret = -ENOMEM;
+ goto out_freekeypad;
+ }
+
+ input->name = "STMPE keypad";
+ input->id.bustype = BUS_I2C;
+ input->dev.parent = &pdev->dev;
+
+ input_set_capability(input, EV_MSC, MSC_SCAN);
+
+ __set_bit(EV_KEY, input->evbit);
+ if (!plat->no_autorepeat)
+ __set_bit(EV_REP, input->evbit);
+
+ input->keycode = keypad->keymap;
+ input->keycodesize = sizeof(keypad->keymap[0]);
+ input->keycodemax = ARRAY_SIZE(keypad->keymap);
+
+ matrix_keypad_build_keymap(plat->keymap_data, STMPE_KEYPAD_ROW_SHIFT,
+ input->keycode, input->keybit);
+
+ for (i = 0; i < plat->keymap_data->keymap_size; i++) {
+ unsigned int key = plat->keymap_data->keymap[i];
+
+ keypad->cols |= 1 << KEY_COL(key);
+ keypad->rows |= 1 << KEY_ROW(key);
+ }
+
+ keypad->stmpe = stmpe;
+ keypad->plat = plat;
+ keypad->input = input;
+ keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
+
+ ret = stmpe_keypad_chip_init(keypad);
+ if (ret < 0)
+ goto out_freeinput;
+
+ ret = input_register_device(input);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "unable to register input device: %d\n", ret);
+ goto out_freeinput;
+ }
+
+ ret = request_threaded_irq(irq, NULL, stmpe_keypad_irq, IRQF_ONESHOT,
+ "stmpe-keypad", keypad);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
+ goto out_unregisterinput;
+ }
+
+ platform_set_drvdata(pdev, keypad);
+
+ return 0;
+
+out_unregisterinput:
+ input_unregister_device(input);
+ input = NULL;
+out_freeinput:
+ input_free_device(input);
+out_freekeypad:
+ kfree(keypad);
+ return ret;
+}
+
+static int __devexit stmpe_keypad_remove(struct platform_device *pdev)
+{
+ struct stmpe_keypad *keypad = platform_get_drvdata(pdev);
+ struct stmpe *stmpe = keypad->stmpe;
+ int irq = platform_get_irq(pdev, 0);
+
+ stmpe_disable(stmpe, STMPE_BLOCK_KEYPAD);
+
+ free_irq(irq, keypad);
+ input_unregister_device(keypad->input);
+ platform_set_drvdata(pdev, NULL);
+ kfree(keypad);
+
+ return 0;
+}
+
+static struct platform_driver stmpe_keypad_driver = {
+ .driver.name = "stmpe-keypad",
+ .driver.owner = THIS_MODULE,
+ .probe = stmpe_keypad_probe,
+ .remove = __devexit_p(stmpe_keypad_remove),
+};
+
+static int __init stmpe_keypad_init(void)
+{
+ return platform_driver_register(&stmpe_keypad_driver);
+}
+module_init(stmpe_keypad_init);
+
+static void __exit stmpe_keypad_exit(void)
+{
+ platform_driver_unregister(&stmpe_keypad_driver);
+}
+module_exit(stmpe_keypad_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STMPExxxx keypad driver");
+MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 61f35184f76..0069d9703fd 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -628,4 +628,14 @@ config TOUCHSCREEN_TPS6507X
To compile this driver as a module, choose M here: the
module will be called tps6507x_ts.
+config TOUCHSCREEN_STMPE
+ tristate "STMicroelectronics STMPE touchscreens"
+ depends on MFD_STMPE
+ help
+ Say Y here if you want support for STMicroelectronics
+ STMPE touchscreen controllers.
+
+ To compile this driver as a module, choose M here: the
+ module will be called stmpe-ts.
+
endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index bd6f30b4ff7..28217e1dcaf 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
obj-$(CONFIG_TOUCHSCREEN_QT602240) += qt602240_ts.o
obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
+obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
new file mode 100644
index 00000000000..656148ec002
--- /dev/null
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -0,0 +1,397 @@
+/* STMicroelectronics STMPE811 Touchscreen Driver
+ *
+ * (C) 2010 Luotao Fu <l.fu@pengutronix.de>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+
+#include <linux/mfd/stmpe.h>
+
+/* Register layouts and functionalities are identical on all stmpexxx variants
+ * with touchscreen controller
+ */
+#define STMPE_REG_INT_STA 0x0B
+#define STMPE_REG_ADC_CTRL1 0x20
+#define STMPE_REG_ADC_CTRL2 0x21
+#define STMPE_REG_TSC_CTRL 0x40
+#define STMPE_REG_TSC_CFG 0x41
+#define STMPE_REG_FIFO_TH 0x4A
+#define STMPE_REG_FIFO_STA 0x4B
+#define STMPE_REG_FIFO_SIZE 0x4C
+#define STMPE_REG_TSC_DATA_XYZ 0x52
+#define STMPE_REG_TSC_FRACTION_Z 0x56
+#define STMPE_REG_TSC_I_DRIVE 0x58
+
+#define OP_MOD_XYZ 0
+
+#define STMPE_TSC_CTRL_TSC_EN (1<<0)
+
+#define STMPE_FIFO_STA_RESET (1<<0)
+
+#define STMPE_IRQ_TOUCH_DET 0
+
+#define SAMPLE_TIME(x) ((x & 0xf) << 4)
+#define MOD_12B(x) ((x & 0x1) << 3)
+#define REF_SEL(x) ((x & 0x1) << 1)
+#define ADC_FREQ(x) (x & 0x3)
+#define AVE_CTRL(x) ((x & 0x3) << 6)
+#define DET_DELAY(x) ((x & 0x7) << 3)
+#define SETTLING(x) (x & 0x7)
+#define FRACTION_Z(x) (x & 0x7)
+#define I_DRIVE(x) (x & 0x1)
+#define OP_MODE(x) ((x & 0x7) << 1)
+
+#define STMPE_TS_NAME "stmpe-ts"
+#define XY_MASK 0xfff
+
+struct stmpe_touch {
+ struct stmpe *stmpe;
+ struct input_dev *idev;
+ struct delayed_work work;
+ struct device *dev;
+ u8 sample_time;
+ u8 mod_12b;
+ u8 ref_sel;
+ u8 adc_freq;
+ u8 ave_ctrl;
+ u8 touch_det_delay;
+ u8 settling;
+ u8 fraction_z;
+ u8 i_drive;
+};
+
+static int __stmpe_reset_fifo(struct stmpe *stmpe)
+{
+ int ret;
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_FIFO_STA,
+ STMPE_FIFO_STA_RESET, STMPE_FIFO_STA_RESET);
+ if (ret)
+ return ret;
+
+ return stmpe_set_bits(stmpe, STMPE_REG_FIFO_STA,
+ STMPE_FIFO_STA_RESET, 0);
+}
+
+static void stmpe_work(struct work_struct *work)
+{
+ int int_sta;
+ u32 timeout = 40;
+
+ struct stmpe_touch *ts =
+ container_of(work, struct stmpe_touch, work.work);
+
+ int_sta = stmpe_reg_read(ts->stmpe, STMPE_REG_INT_STA);
+
+ /*
+ * touch_det sometimes get desasserted or just get stuck. This appears
+ * to be a silicon bug, We still have to clearify this with the
+ * manufacture. As a workaround We release the key anyway if the
+ * touch_det keeps coming in after 4ms, while the FIFO contains no value
+ * during the whole time.
+ */
+ while ((int_sta & (1 << STMPE_IRQ_TOUCH_DET)) && (timeout > 0)) {
+ timeout--;
+ int_sta = stmpe_reg_read(ts->stmpe, STMPE_REG_INT_STA);
+ udelay(100);
+ }
+
+ /* reset the FIFO before we report release event */
+ __stmpe_reset_fifo(ts->stmpe);
+
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
+ input_sync(ts->idev);
+}
+
+static irqreturn_t stmpe_ts_handler(int irq, void *data)
+{
+ u8 data_set[4];
+ int x, y, z;
+ struct stmpe_touch *ts = data;
+
+ /*
+ * Cancel scheduled polling for release if we have new value
+ * available. Wait if the polling is already running.
+ */
+ cancel_delayed_work_sync(&ts->work);
+
+ /*
+ * The FIFO sometimes just crashes and stops generating interrupts. This
+ * appears to be a silicon bug. We still have to clearify this with
+ * the manufacture. As a workaround we disable the TSC while we are
+ * collecting data and flush the FIFO after reading
+ */
+ stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
+ STMPE_TSC_CTRL_TSC_EN, 0);
+
+ stmpe_block_read(ts->stmpe, STMPE_REG_TSC_DATA_XYZ, 4, data_set);
+
+ x = (data_set[0] << 4) | (data_set[1] >> 4);
+ y = ((data_set[1] & 0xf) << 8) | data_set[2];
+ z = data_set[3];
+
+ input_report_abs(ts->idev, ABS_X, x);
+ input_report_abs(ts->idev, ABS_Y, y);
+ input_report_abs(ts->idev, ABS_PRESSURE, z);
+ input_sync(ts->idev);
+
+ /* flush the FIFO after we have read out our values. */
+ __stmpe_reset_fifo(ts->stmpe);
+
+ /* reenable the tsc */
+ stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
+ STMPE_TSC_CTRL_TSC_EN, STMPE_TSC_CTRL_TSC_EN);
+
+ /* start polling for touch_det to detect release */
+ schedule_delayed_work(&ts->work, HZ / 50);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit stmpe_init_hw(struct stmpe_touch *ts)
+{
+ int ret;
+ u8 adc_ctrl1, adc_ctrl1_mask, tsc_cfg, tsc_cfg_mask;
+ struct stmpe *stmpe = ts->stmpe;
+ struct device *dev = ts->dev;
+
+ ret = stmpe_enable(stmpe, STMPE_BLOCK_TOUCHSCREEN | STMPE_BLOCK_ADC);
+ if (ret) {
+ dev_err(dev, "Could not enable clock for ADC and TS\n");
+ return ret;
+ }
+
+ adc_ctrl1 = SAMPLE_TIME(ts->sample_time) | MOD_12B(ts->mod_12b) |
+ REF_SEL(ts->ref_sel);
+ adc_ctrl1_mask = SAMPLE_TIME(0xff) | MOD_12B(0xff) | REF_SEL(0xff);
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_ADC_CTRL1,
+ adc_ctrl1_mask, adc_ctrl1);
+ if (ret) {
+ dev_err(dev, "Could not setup ADC\n");
+ return ret;
+ }
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_ADC_CTRL2,
+ ADC_FREQ(0xff), ADC_FREQ(ts->adc_freq));
+ if (ret) {
+ dev_err(dev, "Could not setup ADC\n");
+ return ret;
+ }
+
+ tsc_cfg = AVE_CTRL(ts->ave_ctrl) | DET_DELAY(ts->touch_det_delay) |
+ SETTLING(ts->settling);
+ tsc_cfg_mask = AVE_CTRL(0xff) | DET_DELAY(0xff) | SETTLING(0xff);
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_CFG, tsc_cfg_mask, tsc_cfg);
+ if (ret) {
+ dev_err(dev, "Could not config touch\n");
+ return ret;
+ }
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_FRACTION_Z,
+ FRACTION_Z(0xff), FRACTION_Z(ts->fraction_z));
+ if (ret) {
+ dev_err(dev, "Could not config touch\n");
+ return ret;
+ }
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_I_DRIVE,
+ I_DRIVE(0xff), I_DRIVE(ts->i_drive));
+ if (ret) {
+ dev_err(dev, "Could not config touch\n");
+ return ret;
+ }
+
+ /* set FIFO to 1 for single point reading */
+ ret = stmpe_reg_write(stmpe, STMPE_REG_FIFO_TH, 1);
+ if (ret) {
+ dev_err(dev, "Could not set FIFO\n");
+ return ret;
+ }
+
+ ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_CTRL,
+ OP_MODE(0xff), OP_MODE(OP_MOD_XYZ));
+ if (ret) {
+ dev_err(dev, "Could not set mode\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int stmpe_ts_open(struct input_dev *dev)
+{
+ struct stmpe_touch *ts = input_get_drvdata(dev);
+ int ret = 0;
+
+ ret = __stmpe_reset_fifo(ts->stmpe);
+ if (ret)
+ return ret;
+
+ return stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
+ STMPE_TSC_CTRL_TSC_EN, STMPE_TSC_CTRL_TSC_EN);
+}
+
+static void stmpe_ts_close(struct input_dev *dev)
+{
+ struct stmpe_touch *ts = input_get_drvdata(dev);
+
+ cancel_delayed_work_sync(&ts->work);
+
+ stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
+ STMPE_TSC_CTRL_TSC_EN, 0);
+}
+
+static int __devinit stmpe_input_probe(struct platform_device *pdev)
+{
+ struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
+ struct stmpe_platform_data *pdata = stmpe->pdata;
+ struct stmpe_touch *ts;
+ struct input_dev *idev;
+ struct stmpe_ts_platform_data *ts_pdata = NULL;
+ int ret = 0;
+ int ts_irq;
+
+ ts_irq = platform_get_irq_byname(pdev, "FIFO_TH");
+ if (ts_irq < 0)
+ return ts_irq;
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ goto err_out;
+
+ idev = input_allocate_device();
+ if (!idev)
+ goto err_free_ts;
+
+ platform_set_drvdata(pdev, ts);
+ ts->stmpe = stmpe;
+ ts->idev = idev;
+ ts->dev = &pdev->dev;
+
+ if (pdata)
+ ts_pdata = pdata->ts;
+
+ if (ts_pdata) {
+ ts->sample_time = ts_pdata->sample_time;
+ ts->mod_12b = ts_pdata->mod_12b;
+ ts->ref_sel = ts_pdata->ref_sel;
+ ts->adc_freq = ts_pdata->adc_freq;
+ ts->ave_ctrl = ts_pdata->ave_ctrl;
+ ts->touch_det_delay = ts_pdata->touch_det_delay;
+ ts->settling = ts_pdata->settling;
+ ts->fraction_z = ts_pdata->fraction_z;
+ ts->i_drive = ts_pdata->i_drive;
+ }
+
+ INIT_DELAYED_WORK(&ts->work, stmpe_work);
+
+ ret = request_threaded_irq(ts_irq, NULL, stmpe_ts_handler,
+ IRQF_ONESHOT, STMPE_TS_NAME, ts);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request IRQ %d\n", ts_irq);
+ goto err_free_input;
+ }
+
+ ret = stmpe_init_hw(ts);
+ if (ret)
+ goto err_free_irq;
+
+ idev->name = STMPE_TS_NAME;
+ idev->id.bustype = BUS_I2C;
+ idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+ idev->open = stmpe_ts_open;
+ idev->close = stmpe_ts_close;
+
+ input_set_drvdata(idev, ts);
+
+ input_set_abs_params(idev, ABS_X, 0, XY_MASK, 0, 0);
+ input_set_abs_params(idev, ABS_Y, 0, XY_MASK, 0, 0);
+ input_set_abs_params(idev, ABS_PRESSURE, 0x0, 0xff, 0, 0);
+
+ ret = input_register_device(idev);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register input device\n");
+ goto err_free_irq;
+ }
+
+ return ret;
+
+err_free_irq:
+ free_irq(ts_irq, ts);
+err_free_input:
+ input_free_device(idev);
+ platform_set_drvdata(pdev, NULL);
+err_free_ts:
+ kfree(ts);
+err_out:
+ return ret;
+}
+
+static int __devexit stmpe_ts_remove(struct platform_device *pdev)
+{
+ struct stmpe_touch *ts = platform_get_drvdata(pdev);
+ unsigned int ts_irq = platform_get_irq_byname(pdev, "FIFO_TH");
+
+ stmpe_disable(ts->stmpe, STMPE_BLOCK_TOUCHSCREEN);
+
+ free_irq(ts_irq, ts);
+
+ platform_set_drvdata(pdev, NULL);
+
+ input_unregister_device(ts->idev);
+ input_free_device(ts->idev);
+
+ kfree(ts);
+
+ return 0;
+}
+
+static struct platform_driver stmpe_ts_driver = {
+ .driver = {
+ .name = STMPE_TS_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = stmpe_input_probe,
+ .remove = __devexit_p(stmpe_ts_remove),
+};
+
+static int __init stmpe_ts_init(void)
+{
+ return platform_driver_register(&stmpe_ts_driver);
+}
+
+module_init(stmpe_ts_init);
+
+static void __exit stmpe_ts_exit(void)
+{
+ platform_driver_unregister(&stmpe_ts_driver);
+}
+
+module_exit(stmpe_ts_exit);
+
+MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
+MODULE_DESCRIPTION("STMPEXXX touchscreen driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" STMPE_TS_NAME);