--- /dev/null
+/*
+ * Input driver for Microchip CAP1106, 6 channel capacitive touch sensor
+ *
+ * http://www.microchip.com/wwwproducts/Devices.aspx?product=CAP1106
+ *
+ * (c) 2014 Daniel Mack <linux@zonque.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 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/of_irq.h>
+#include <linux/regmap.h>
+#include <linux/i2c.h>
+#include <linux/gpio/consumer.h>
+
+#define CAP1106_REG_MAIN_CONTROL 0x00
+#define CAP1106_REG_MAIN_CONTROL_GAIN_SHIFT (6)
+#define CAP1106_REG_MAIN_CONTROL_GAIN_MASK (0xc0)
+#define CAP1106_REG_MAIN_CONTROL_DLSEEP BIT(4)
+#define CAP1106_REG_GENERAL_STATUS 0x02
+#define CAP1106_REG_SENSOR_INPUT 0x03
+#define CAP1106_REG_NOISE_FLAG_STATUS 0x0a
+#define CAP1106_REG_SENOR_DELTA(X) (0x10 + (X))
+#define CAP1106_REG_SENSITIVITY_CONTROL 0x1f
+#define CAP1106_REG_CONFIG 0x20
+#define CAP1106_REG_SENSOR_ENABLE 0x21
+#define CAP1106_REG_SENSOR_CONFIG 0x22
+#define CAP1106_REG_SENSOR_CONFIG2 0x23
+#define CAP1106_REG_SAMPLING_CONFIG 0x24
+#define CAP1106_REG_CALIBRATION 0x25
+#define CAP1106_REG_INT_ENABLE 0x26
+#define CAP1106_REG_REPEAT_RATE 0x28
+#define CAP1106_REG_MT_CONFIG 0x2a
+#define CAP1106_REG_MT_PATTERN_CONFIG 0x2b
+#define CAP1106_REG_MT_PATTERN 0x2d
+#define CAP1106_REG_RECALIB_CONFIG 0x2f
+#define CAP1106_REG_SENSOR_THRESH(X) (0x30 + (X))
+#define CAP1106_REG_SENSOR_NOISE_THRESH 0x38
+#define CAP1106_REG_STANDBY_CHANNEL 0x40
+#define CAP1106_REG_STANDBY_CONFIG 0x41
+#define CAP1106_REG_STANDBY_SENSITIVITY 0x42
+#define CAP1106_REG_STANDBY_THRESH 0x43
+#define CAP1106_REG_CONFIG2 0x44
+#define CAP1106_REG_SENSOR_BASE_CNT(X) (0x50 + (X))
+#define CAP1106_REG_SENSOR_CALIB (0xb1 + (X))
+#define CAP1106_REG_SENSOR_CALIB_LSB1 0xb9
+#define CAP1106_REG_SENSOR_CALIB_LSB2 0xba
+#define CAP1106_REG_PRODUCT_ID 0xfd
+#define CAP1106_REG_MANUFACTURER_ID 0xfe
+#define CAP1106_REG_REVISION 0xff
+
+#define CAP1106_NUM_CHN 6
+#define CAP1106_PRODUCT_ID 0x55
+#define CAP1106_MANUFACTURER_ID 0x5d
+
+struct cap1106_priv {
+ struct regmap *regmap;
+ struct input_dev *idev;
+
+ /* config */
+ unsigned int keycodes[CAP1106_NUM_CHN];
+};
+
+static const struct reg_default cap1106_reg_defaults[] = {
+ { CAP1106_REG_MAIN_CONTROL, 0x00 },
+ { CAP1106_REG_GENERAL_STATUS, 0x00 },
+ { CAP1106_REG_SENSOR_INPUT, 0x00 },
+ { CAP1106_REG_NOISE_FLAG_STATUS, 0x00 },
+ { CAP1106_REG_SENSITIVITY_CONTROL, 0x2f },
+ { CAP1106_REG_CONFIG, 0x20 },
+ { CAP1106_REG_SENSOR_ENABLE, 0x3f },
+ { CAP1106_REG_SENSOR_CONFIG, 0xa4 },
+ { CAP1106_REG_SENSOR_CONFIG2, 0x07 },
+ { CAP1106_REG_SAMPLING_CONFIG, 0x39 },
+ { CAP1106_REG_CALIBRATION, 0x00 },
+ { CAP1106_REG_INT_ENABLE, 0x3f },
+ { CAP1106_REG_REPEAT_RATE, 0x3f },
+ { CAP1106_REG_MT_CONFIG, 0x80 },
+ { CAP1106_REG_MT_PATTERN_CONFIG, 0x00 },
+ { CAP1106_REG_MT_PATTERN, 0x3f },
+ { CAP1106_REG_RECALIB_CONFIG, 0x8a },
+ { CAP1106_REG_SENSOR_THRESH(0), 0x40 },
+ { CAP1106_REG_SENSOR_THRESH(1), 0x40 },
+ { CAP1106_REG_SENSOR_THRESH(2), 0x40 },
+ { CAP1106_REG_SENSOR_THRESH(3), 0x40 },
+ { CAP1106_REG_SENSOR_THRESH(4), 0x40 },
+ { CAP1106_REG_SENSOR_THRESH(5), 0x40 },
+ { CAP1106_REG_SENSOR_NOISE_THRESH, 0x01 },
+ { CAP1106_REG_STANDBY_CHANNEL, 0x00 },
+ { CAP1106_REG_STANDBY_CONFIG, 0x39 },
+ { CAP1106_REG_STANDBY_SENSITIVITY, 0x02 },
+ { CAP1106_REG_STANDBY_THRESH, 0x40 },
+ { CAP1106_REG_CONFIG2, 0x40 },
+ { CAP1106_REG_SENSOR_CALIB_LSB1, 0x00 },
+ { CAP1106_REG_SENSOR_CALIB_LSB2, 0x00 },
+};
+
+static bool cap1106_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CAP1106_REG_MAIN_CONTROL:
+ case CAP1106_REG_SENSOR_INPUT:
+ case CAP1106_REG_SENOR_DELTA(0):
+ case CAP1106_REG_SENOR_DELTA(1):
+ case CAP1106_REG_SENOR_DELTA(2):
+ case CAP1106_REG_SENOR_DELTA(3):
+ case CAP1106_REG_SENOR_DELTA(4):
+ case CAP1106_REG_SENOR_DELTA(5):
+ case CAP1106_REG_PRODUCT_ID:
+ case CAP1106_REG_MANUFACTURER_ID:
+ case CAP1106_REG_REVISION:
+ return true;
+ }
+
+ return false;
+}
+
+static const struct regmap_config cap1106_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = CAP1106_REG_REVISION,
+ .reg_defaults = cap1106_reg_defaults,
+
+ .num_reg_defaults = ARRAY_SIZE(cap1106_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = cap1106_volatile_reg,
+};
+
+static irqreturn_t cap1106_thread_func(int irq_num, void *data)
+{
+ struct cap1106_priv *priv = data;
+ unsigned int status;
+ int ret, i;
+
+ /*
+ * Deassert interrupt. This needs to be done before reading the status
+ * registers, which will not carry valid values otherwise.
+ */
+ ret = regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL, 1, 0);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_read(priv->regmap, CAP1106_REG_SENSOR_INPUT, &status);
+ if (ret < 0)
+ goto out;
+
+ for (i = 0; i < CAP1106_NUM_CHN; i++)
+ input_report_key(priv->idev, priv->keycodes[i],
+ status & (1 << i));
+
+ input_sync(priv->idev);
+
+out:
+ return IRQ_HANDLED;
+}
+
+static int cap1106_set_sleep(struct cap1106_priv *priv, bool sleep)
+{
+ return regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL,
+ CAP1106_REG_MAIN_CONTROL_DLSEEP,
+ sleep ? CAP1106_REG_MAIN_CONTROL_DLSEEP : 0);
+}
+
+static int cap1106_input_open(struct input_dev *idev)
+{
+ struct cap1106_priv *priv = input_get_drvdata(idev);
+
+ return cap1106_set_sleep(priv, false);
+}
+
+static void cap1106_input_close(struct input_dev *idev)
+{
+ struct cap1106_priv *priv = input_get_drvdata(idev);
+
+ cap1106_set_sleep(priv, true);
+}
+
+static int cap1106_i2c_probe(struct i2c_client *i2c_client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &i2c_client->dev;
+ struct cap1106_priv *priv;
+ struct device_node *node;
+ int i, error, irq, gain = 0;
+ unsigned int val, rev;
+ u32 gain32, keycodes[CAP1106_NUM_CHN];
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = devm_regmap_init_i2c(i2c_client, &cap1106_regmap_config);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+
+ error = regmap_read(priv->regmap, CAP1106_REG_PRODUCT_ID, &val);
+ if (error)
+ return error;
+
+ if (val != CAP1106_PRODUCT_ID) {
+ dev_err(dev, "Product ID: Got 0x%02x, expected 0x%02x\n",
+ val, CAP1106_PRODUCT_ID);
+ return -ENODEV;
+ }
+
+ error = regmap_read(priv->regmap, CAP1106_REG_MANUFACTURER_ID, &val);
+ if (error)
+ return error;
+
+ if (val != CAP1106_MANUFACTURER_ID) {
+ dev_err(dev, "Manufacturer ID: Got 0x%02x, expected 0x%02x\n",
+ val, CAP1106_MANUFACTURER_ID);
+ return -ENODEV;
+ }
+
+ error = regmap_read(priv->regmap, CAP1106_REG_REVISION, &rev);
+ if (error < 0)
+ return error;
+
+ dev_info(dev, "CAP1106 detected, revision 0x%02x\n", rev);
+ i2c_set_clientdata(i2c_client, priv);
+ node = dev->of_node;
+
+ if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) {
+ if (is_power_of_2(gain32) && gain32 <= 8)
+ gain = ilog2(gain32);
+ else
+ dev_err(dev, "Invalid sensor-gain value %d\n", gain32);
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(keycodes) != ARRAY_SIZE(priv->keycodes));
+
+ /* Provide some useful defaults */
+ for (i = 0; i < ARRAY_SIZE(keycodes); i++)
+ keycodes[i] = KEY_A + i;
+
+ of_property_read_u32_array(node, "linux,keycodes",
+ keycodes, ARRAY_SIZE(keycodes));
+
+ for (i = 0; i < ARRAY_SIZE(keycodes); i++)
+ priv->keycodes[i] = keycodes[i];
+
+ error = regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL,
+ CAP1106_REG_MAIN_CONTROL_GAIN_MASK,
+ gain << CAP1106_REG_MAIN_CONTROL_GAIN_SHIFT);
+ if (error)
+ return error;
+
+ /* Disable autorepeat. The Linux input system has its own handling. */
+ error = regmap_write(priv->regmap, CAP1106_REG_REPEAT_RATE, 0);
+ if (error)
+ return error;
+
+ priv->idev = devm_input_allocate_device(dev);
+ if (!priv->idev)
+ return -ENOMEM;
+
+ priv->idev->name = "CAP1106 capacitive touch sensor";
+ priv->idev->id.bustype = BUS_I2C;
+ priv->idev->evbit[0] = BIT_MASK(EV_KEY);
+
+ if (of_property_read_bool(node, "autorepeat"))
+ __set_bit(EV_REP, priv->idev->evbit);
+
+ for (i = 0; i < CAP1106_NUM_CHN; i++)
+ __set_bit(priv->keycodes[i], priv->idev->keybit);
+
+ priv->idev->id.vendor = CAP1106_MANUFACTURER_ID;
+ priv->idev->id.product = CAP1106_PRODUCT_ID;
+ priv->idev->id.version = rev;
+
+ priv->idev->open = cap1106_input_open;
+ priv->idev->close = cap1106_input_close;
+
+ input_set_drvdata(priv->idev, priv);
+
+ /*
+ * Put the device in deep sleep mode for now.
+ * ->open() will bring it back once the it is actually needed.
+ */
+ cap1106_set_sleep(priv, true);
+
+ error = input_register_device(priv->idev);
+ if (error)
+ return error;
+
+ irq = irq_of_parse_and_map(node, 0);
+ if (!irq) {
+ dev_err(dev, "Unable to parse or map IRQ\n");
+ return -ENXIO;
+ }
+
+ error = devm_request_threaded_irq(dev, irq, NULL, cap1106_thread_func,
+ IRQF_ONESHOT, dev_name(dev), priv);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static const struct of_device_id cap1106_dt_ids[] = {
+ { .compatible = "microchip,cap1106", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, cap1106_dt_ids);
+
+static const struct i2c_device_id cap1106_i2c_ids[] = {
+ { "cap1106", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, cap1106_i2c_ids);
+
+static struct i2c_driver cap1106_i2c_driver = {
+ .driver = {
+ .name = "cap1106",
+ .owner = THIS_MODULE,
+ .of_match_table = cap1106_dt_ids,
+ },
+ .id_table = cap1106_i2c_ids,
+ .probe = cap1106_i2c_probe,
+};
+
+module_i2c_driver(cap1106_i2c_driver);
+
+MODULE_ALIAS("platform:cap1106");
+MODULE_DESCRIPTION("Microchip CAP1106 driver");
+MODULE_AUTHOR("Daniel Mack <linux@zonque.org>");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * Wacom protocol 4 serial tablet driver
+ *
+ * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
+ * Copyright 2011-2012 Julian Squires <julian@cipht.net>
+ *
+ * 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 of 2 of the License, or (at your
+ * option) any later version. See the file COPYING in the main directory of
+ * this archive for more details.
+ *
+ * Many thanks to Bill Seremetis, without whom PenPartner support
+ * would not have been possible. Thanks to Patrick Mahoney.
+ *
+ * This driver was developed with reference to much code written by others,
+ * particularly:
+ * - elo, gunze drivers by Vojtech Pavlik <vojtech@ucw.cz>;
+ * - wacom_w8001 driver by Jaya Kumar <jayakumar.lkml@gmail.com>;
+ * - the USB wacom input driver, credited to many people
+ * (see drivers/input/tablet/wacom.h);
+ * - new and old versions of linuxwacom / xf86-input-wacom credited to
+ * Frederic Lepied, France. <Lepied@XFree86.org> and
+ * Ping Cheng, Wacom. <pingc@wacom.com>;
+ * - and xf86wacom.c (a presumably ancient version of the linuxwacom code),
+ * by Frederic Lepied and Raph Levien <raph@gtk.org>.
+ *
+ * To do:
+ * - support pad buttons; (requires access to a model with pad buttons)
+ * - support (protocol 4-style) tilt (requires access to a > 1.4 rom model)
+ */
+
+/*
+ * Wacom serial protocol 4 documentation taken from linuxwacom-0.9.9 code,
+ * protocol 4 uses 7 or 9 byte of data in the following format:
+ *
+ * Byte 1
+ * bit 7 Sync bit always 1
+ * bit 6 Pointing device detected
+ * bit 5 Cursor = 0 / Stylus = 1
+ * bit 4 Reserved
+ * bit 3 1 if a button on the pointing device has been pressed
+ * bit 2 P0 (optional)
+ * bit 1 X15
+ * bit 0 X14
+ *
+ * Byte 2
+ * bit 7 Always 0
+ * bits 6-0 = X13 - X7
+ *
+ * Byte 3
+ * bit 7 Always 0
+ * bits 6-0 = X6 - X0
+ *
+ * Byte 4
+ * bit 7 Always 0
+ * bit 6 B3
+ * bit 5 B2
+ * bit 4 B1
+ * bit 3 B0
+ * bit 2 P1 (optional)
+ * bit 1 Y15
+ * bit 0 Y14
+ *
+ * Byte 5
+ * bit 7 Always 0
+ * bits 6-0 = Y13 - Y7
+ *
+ * Byte 6
+ * bit 7 Always 0
+ * bits 6-0 = Y6 - Y0
+ *
+ * Byte 7
+ * bit 7 Always 0
+ * bit 6 Sign of pressure data; or wheel-rel for cursor tool
+ * bit 5 P7; or REL1 for cursor tool
+ * bit 4 P6; or REL0 for cursor tool
+ * bit 3 P5
+ * bit 2 P4
+ * bit 1 P3
+ * bit 0 P2
+ *
+ * byte 8 and 9 are optional and present only
+ * in tilt mode.
+ *
+ * Byte 8
+ * bit 7 Always 0
+ * bit 6 Sign of tilt X
+ * bit 5 Xt6
+ * bit 4 Xt5
+ * bit 3 Xt4
+ * bit 2 Xt3
+ * bit 1 Xt2
+ * bit 0 Xt1
+ *
+ * Byte 9
+ * bit 7 Always 0
+ * bit 6 Sign of tilt Y
+ * bit 5 Yt6
+ * bit 4 Yt5
+ * bit 3 Yt4
+ * bit 2 Yt3
+ * bit 1 Yt2
+ * bit 0 Yt1
+ */
+
+#include <linux/completion.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include "wacom_wac.h"
+
+MODULE_AUTHOR("Julian Squires <julian@cipht.net>, Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("Wacom protocol 4 serial tablet driver");
+MODULE_LICENSE("GPL");
+
+#define REQUEST_MODEL_AND_ROM_VERSION "~#"
+#define REQUEST_MAX_COORDINATES "~C\r"
+#define REQUEST_CONFIGURATION_STRING "~R\r"
+#define REQUEST_RESET_TO_PROTOCOL_IV "\r#"
+/*
+ * Note: sending "\r$\r" causes at least the Digitizer II to send
+ * packets in ASCII instead of binary. "\r#" seems to undo that.
+ */
+
+#define COMMAND_START_SENDING_PACKETS "ST\r"
+#define COMMAND_STOP_SENDING_PACKETS "SP\r"
+#define COMMAND_MULTI_MODE_INPUT "MU1\r"
+#define COMMAND_ORIGIN_IN_UPPER_LEFT "OC1\r"
+#define COMMAND_ENABLE_ALL_MACRO_BUTTONS "~M0\r"
+#define COMMAND_DISABLE_GROUP_1_MACRO_BUTTONS "~M1\r"
+#define COMMAND_TRANSMIT_AT_MAX_RATE "IT0\r"
+#define COMMAND_DISABLE_INCREMENTAL_MODE "IN0\r"
+#define COMMAND_ENABLE_CONTINUOUS_MODE "SR\r"
+#define COMMAND_ENABLE_PRESSURE_MODE "PH1\r"
+#define COMMAND_Z_FILTER "ZF1\r"
+
+/* Note that this is a protocol 4 packet without tilt information. */
+#define PACKET_LENGTH 7
+#define DATA_SIZE 32
+
+/* flags */
+#define F_COVERS_SCREEN 0x01
+#define F_HAS_STYLUS2 0x02
+#define F_HAS_SCROLLWHEEL 0x04
+
+enum { STYLUS = 1, ERASER, CURSOR };
+
+static const struct {
+ int device_id;
+ int input_id;
+} tools[] = {
+ { 0, 0 },
+ { STYLUS_DEVICE_ID, BTN_TOOL_PEN },
+ { ERASER_DEVICE_ID, BTN_TOOL_RUBBER },
+ { CURSOR_DEVICE_ID, BTN_TOOL_MOUSE },
+};
+
+struct wacom {
+ struct input_dev *dev;
+ struct completion cmd_done;
+ int result;
+ u8 expect;
+ u8 eraser_mask;
+ unsigned int extra_z_bits;
+ unsigned int flags;
+ unsigned int res_x, res_y;
+ unsigned int max_x, max_y;
+ unsigned int tool;
+ unsigned int idx;
+ u8 data[DATA_SIZE];
+ char phys[32];
+};
+
+enum {
+ MODEL_CINTIQ = 0x504C, /* PL */
+ MODEL_CINTIQ2 = 0x4454, /* DT */
+ MODEL_DIGITIZER_II = 0x5544, /* UD */
+ MODEL_GRAPHIRE = 0x4554, /* ET */
+ MODEL_PENPARTNER = 0x4354, /* CT */
+};
+
+static void wacom_handle_model_response(struct wacom *wacom)
+{
+ int major_v, minor_v, r = 0;
+ char *p;
+
+ p = strrchr(wacom->data, 'V');
+ if (p)
+ r = sscanf(p + 1, "%u.%u", &major_v, &minor_v);
+ if (r != 2)
+ major_v = minor_v = 0;
+
+ switch (wacom->data[2] << 8 | wacom->data[3]) {
+ case MODEL_CINTIQ: /* UNTESTED */
+ case MODEL_CINTIQ2:
+ if ((wacom->data[2] << 8 | wacom->data[3]) == MODEL_CINTIQ) {
+ wacom->dev->name = "Wacom Cintiq";
+ wacom->dev->id.version = MODEL_CINTIQ;
+ } else {
+ wacom->dev->name = "Wacom Cintiq II";
+ wacom->dev->id.version = MODEL_CINTIQ2;
+ }
+ wacom->res_x = 508;
+ wacom->res_y = 508;
+
+ switch (wacom->data[5] << 8 | wacom->data[6]) {
+ case 0x3731: /* PL-710 */
+ wacom->res_x = 2540;
+ wacom->res_y = 2540;
+ /* fall through */
+ case 0x3535: /* PL-550 */
+ case 0x3830: /* PL-800 */
+ wacom->extra_z_bits = 2;
+ }
+
+ wacom->flags = F_COVERS_SCREEN;
+ break;
+
+ case MODEL_PENPARTNER:
+ wacom->dev->name = "Wacom Penpartner";
+ wacom->dev->id.version = MODEL_PENPARTNER;
+ wacom->res_x = 1000;
+ wacom->res_y = 1000;
+ break;
+
+ case MODEL_GRAPHIRE:
+ wacom->dev->name = "Wacom Graphire";
+ wacom->dev->id.version = MODEL_GRAPHIRE;
+ wacom->res_x = 1016;
+ wacom->res_y = 1016;
+ wacom->max_x = 5103;
+ wacom->max_y = 3711;
+ wacom->extra_z_bits = 2;
+ wacom->eraser_mask = 0x08;
+ wacom->flags = F_HAS_STYLUS2 | F_HAS_SCROLLWHEEL;
+ break;
+
+ case MODEL_DIGITIZER_II:
+ wacom->dev->name = "Wacom Digitizer II";
+ wacom->dev->id.version = MODEL_DIGITIZER_II;
+ if (major_v == 1 && minor_v <= 2)
+ wacom->extra_z_bits = 0; /* UNTESTED */
+ break;
+
+ default:
+ dev_err(&wacom->dev->dev, "Unsupported Wacom model %s\n",
+ wacom->data);
+ wacom->result = -ENODEV;
+ return;
+ }
+
+ dev_info(&wacom->dev->dev, "%s tablet, version %u.%u\n",
+ wacom->dev->name, major_v, minor_v);
+}
+
+static void wacom_handle_configuration_response(struct wacom *wacom)
+{
+ int r, skip;
+
+ dev_dbg(&wacom->dev->dev, "Configuration string: %s\n", wacom->data);
+ r = sscanf(wacom->data, "~R%x,%u,%u,%u,%u", &skip, &skip, &skip,
+ &wacom->res_x, &wacom->res_y);
+ if (r != 5)
+ dev_warn(&wacom->dev->dev, "could not get resolution\n");
+}
+
+static void wacom_handle_coordinates_response(struct wacom *wacom)
+{
+ int r;
+
+ dev_dbg(&wacom->dev->dev, "Coordinates string: %s\n", wacom->data);
+ r = sscanf(wacom->data, "~C%u,%u", &wacom->max_x, &wacom->max_y);
+ if (r != 2)
+ dev_warn(&wacom->dev->dev, "could not get max coordinates\n");
+}
+
+static void wacom_handle_response(struct wacom *wacom)
+{
+ if (wacom->data[0] != '~' || wacom->data[1] != wacom->expect) {
+ dev_err(&wacom->dev->dev,
+ "Wacom got an unexpected response: %s\n", wacom->data);
+ wacom->result = -EIO;
+ } else {
+ wacom->result = 0;
+
+ switch (wacom->data[1]) {
+ case '#':
+ wacom_handle_model_response(wacom);
+ break;
+ case 'R':
+ wacom_handle_configuration_response(wacom);
+ break;
+ case 'C':
+ wacom_handle_coordinates_response(wacom);
+ break;
+ }
+ }
+
+ complete(&wacom->cmd_done);
+}
+
+static void wacom_handle_packet(struct wacom *wacom)
+{
+ u8 in_proximity_p, stylus_p, button;
+ unsigned int tool;
+ int x, y, z;
+
+ in_proximity_p = wacom->data[0] & 0x40;
+ stylus_p = wacom->data[0] & 0x20;
+ button = (wacom->data[3] & 0x78) >> 3;
+ x = (wacom->data[0] & 3) << 14 | wacom->data[1]<<7 | wacom->data[2];
+ y = (wacom->data[3] & 3) << 14 | wacom->data[4]<<7 | wacom->data[5];
+
+ if (in_proximity_p && stylus_p) {
+ z = wacom->data[6] & 0x7f;
+ if (wacom->extra_z_bits >= 1)
+ z = z << 1 | (wacom->data[3] & 0x4) >> 2;
+ if (wacom->extra_z_bits > 1)
+ z = z << 1 | (wacom->data[0] & 0x4) >> 2;
+ z = z ^ (0x40 << wacom->extra_z_bits);
+ } else {
+ z = -1;
+ }
+
+ if (stylus_p)
+ tool = (button & wacom->eraser_mask) ? ERASER : STYLUS;
+ else
+ tool = CURSOR;
+
+ if (tool != wacom->tool && wacom->tool != 0) {
+ input_report_key(wacom->dev, tools[wacom->tool].input_id, 0);
+ input_sync(wacom->dev);
+ }
+ wacom->tool = tool;
+
+ input_report_key(wacom->dev, tools[tool].input_id, in_proximity_p);
+ input_report_abs(wacom->dev, ABS_MISC,
+ in_proximity_p ? tools[tool].device_id : 0);
+ input_report_abs(wacom->dev, ABS_X, x);
+ input_report_abs(wacom->dev, ABS_Y, y);
+ input_report_abs(wacom->dev, ABS_PRESSURE, z);
+ if (stylus_p) {
+ input_report_key(wacom->dev, BTN_TOUCH, button & 1);
+ input_report_key(wacom->dev, BTN_STYLUS, button & 2);
+ input_report_key(wacom->dev, BTN_STYLUS2, button & 4);
+ } else {
+ input_report_key(wacom->dev, BTN_LEFT, button & 1);
+ input_report_key(wacom->dev, BTN_RIGHT, button & 2);
+ input_report_key(wacom->dev, BTN_MIDDLE, button & 4);
+ /* handle relative wheel for non-stylus device */
+ z = (wacom->data[6] & 0x30) >> 4;
+ if (wacom->data[6] & 0x40)
+ z = -z;
+ input_report_rel(wacom->dev, REL_WHEEL, z);
+ }
+ input_sync(wacom->dev);
+}
+
+static void wacom_clear_data_buf(struct wacom *wacom)
+{
+ memset(wacom->data, 0, DATA_SIZE);
+ wacom->idx = 0;
+}
+
+static irqreturn_t wacom_interrupt(struct serio *serio, unsigned char data,
+ unsigned int flags)
+{
+ struct wacom *wacom = serio_get_drvdata(serio);
+
+ if (data & 0x80)
+ wacom->idx = 0;
+
+ /*
+ * We're either expecting a carriage return-terminated ASCII
+ * response string, or a seven-byte packet with the MSB set on
+ * the first byte.
+ *
+ * Note however that some tablets (the PenPartner, for
+ * example) don't send a carriage return at the end of a
+ * command. We handle these by waiting for timeout.
+ */
+ if (data == '\r' && !(wacom->data[0] & 0x80)) {
+ wacom_handle_response(wacom);
+ wacom_clear_data_buf(wacom);
+ return IRQ_HANDLED;
+ }
+
+ /* Leave place for 0 termination */
+ if (wacom->idx > (DATA_SIZE - 2)) {
+ dev_dbg(&wacom->dev->dev,
+ "throwing away %d bytes of garbage\n", wacom->idx);
+ wacom_clear_data_buf(wacom);
+ }
+ wacom->data[wacom->idx++] = data;
+
+ if (wacom->idx == PACKET_LENGTH && (wacom->data[0] & 0x80)) {
+ wacom_handle_packet(wacom);
+ wacom_clear_data_buf(wacom);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void wacom_disconnect(struct serio *serio)
+{
+ struct wacom *wacom = serio_get_drvdata(serio);
+
+ serio_close(serio);
+ serio_set_drvdata(serio, NULL);
+ input_unregister_device(wacom->dev);
+ kfree(wacom);
+}
+
+static int wacom_send(struct serio *serio, const u8 *command)
+{
+ int err = 0;
+
+ for (; !err && *command; command++)
+ err = serio_write(serio, *command);
+
+ return err;
+}
+
+static int wacom_send_setup_string(struct wacom *wacom, struct serio *serio)
+{
+ const u8 *cmd;
+
+ switch (wacom->dev->id.version) {
+ case MODEL_CINTIQ: /* UNTESTED */
+ cmd = COMMAND_ORIGIN_IN_UPPER_LEFT
+ COMMAND_TRANSMIT_AT_MAX_RATE
+ COMMAND_ENABLE_CONTINUOUS_MODE
+ COMMAND_START_SENDING_PACKETS;
+ break;
+
+ case MODEL_PENPARTNER:
+ cmd = COMMAND_ENABLE_PRESSURE_MODE
+ COMMAND_START_SENDING_PACKETS;
+ break;
+
+ default:
+ cmd = COMMAND_MULTI_MODE_INPUT
+ COMMAND_ORIGIN_IN_UPPER_LEFT
+ COMMAND_ENABLE_ALL_MACRO_BUTTONS
+ COMMAND_DISABLE_GROUP_1_MACRO_BUTTONS
+ COMMAND_TRANSMIT_AT_MAX_RATE
+ COMMAND_DISABLE_INCREMENTAL_MODE
+ COMMAND_ENABLE_CONTINUOUS_MODE
+ COMMAND_Z_FILTER
+ COMMAND_START_SENDING_PACKETS;
+ break;
+ }
+
+ return wacom_send(serio, cmd);
+}
+
+static int wacom_send_and_wait(struct wacom *wacom, struct serio *serio,
+ const u8 *cmd, const char *desc)
+{
+ int err;
+ unsigned long u;
+
+ wacom->expect = cmd[1];
+ init_completion(&wacom->cmd_done);
+
+ err = wacom_send(serio, cmd);
+ if (err)
+ return err;
+
+ u = wait_for_completion_timeout(&wacom->cmd_done, HZ);
+ if (u == 0) {
+ /* Timeout, process what we've received. */
+ wacom_handle_response(wacom);
+ }
+
+ wacom->expect = 0;
+ return wacom->result;
+}
+
+static int wacom_setup(struct wacom *wacom, struct serio *serio)
+{
+ int err;
+
+ /* Note that setting the link speed is the job of inputattach.
+ * We assume that reset negotiation has already happened,
+ * here. */
+ err = wacom_send_and_wait(wacom, serio, REQUEST_MODEL_AND_ROM_VERSION,
+ "model and version");
+ if (err)
+ return err;
+
+ if (!(wacom->res_x && wacom->res_y)) {
+ err = wacom_send_and_wait(wacom, serio,
+ REQUEST_CONFIGURATION_STRING,
+ "configuration string");
+ if (err)
+ return err;
+ }
+
+ if (!(wacom->max_x && wacom->max_y)) {
+ err = wacom_send_and_wait(wacom, serio,
+ REQUEST_MAX_COORDINATES,
+ "coordinates string");
+ if (err)
+ return err;
+ }
+
+ return wacom_send_setup_string(wacom, serio);
+}
+
+static int wacom_connect(struct serio *serio, struct serio_driver *drv)
+{
+ struct wacom *wacom;
+ struct input_dev *input_dev;
+ int err = -ENOMEM;
+
+ wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!wacom || !input_dev)
+ goto free_device;
+
+ wacom->dev = input_dev;
+ wacom->extra_z_bits = 1;
+ wacom->eraser_mask = 0x04;
+ wacom->tool = wacom->idx = 0;
+ snprintf(wacom->phys, sizeof(wacom->phys), "%s/input0", serio->phys);
+ input_dev->phys = wacom->phys;
+ input_dev->id.bustype = BUS_RS232;
+ input_dev->id.vendor = SERIO_WACOM_IV;
+ input_dev->id.product = serio->id.extra;
+ input_dev->dev.parent = &serio->dev;
+
+ input_dev->evbit[0] =
+ BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) | BIT_MASK(EV_REL);
+ set_bit(ABS_MISC, input_dev->absbit);
+ set_bit(BTN_TOOL_PEN, input_dev->keybit);
+ set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
+ set_bit(BTN_TOOL_MOUSE, input_dev->keybit);
+ set_bit(BTN_TOUCH, input_dev->keybit);
+ set_bit(BTN_STYLUS, input_dev->keybit);
+ set_bit(BTN_LEFT, input_dev->keybit);
+ set_bit(BTN_RIGHT, input_dev->keybit);
+ set_bit(BTN_MIDDLE, input_dev->keybit);
+
+ serio_set_drvdata(serio, wacom);
+
+ err = serio_open(serio, drv);
+ if (err)
+ goto free_device;
+
+ err = wacom_setup(wacom, serio);
+ if (err)
+ goto close_serio;
+
+ set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
+ if (!(wacom->flags & F_COVERS_SCREEN))
+ __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+
+ if (wacom->flags & F_HAS_STYLUS2)
+ __set_bit(BTN_STYLUS2, input_dev->keybit);
+
+ if (wacom->flags & F_HAS_SCROLLWHEEL)
+ __set_bit(REL_WHEEL, input_dev->relbit);
+
+ input_abs_set_res(wacom->dev, ABS_X, wacom->res_x);
+ input_abs_set_res(wacom->dev, ABS_Y, wacom->res_y);
+ input_set_abs_params(wacom->dev, ABS_X, 0, wacom->max_x, 0, 0);
+ input_set_abs_params(wacom->dev, ABS_Y, 0, wacom->max_y, 0, 0);
+ input_set_abs_params(wacom->dev, ABS_PRESSURE, -1,
+ (1 << (7 + wacom->extra_z_bits)) - 1, 0, 0);
+
+ err = input_register_device(wacom->dev);
+ if (err)
+ goto close_serio;
+
+ return 0;
+
+close_serio:
+ serio_close(serio);
+free_device:
+ serio_set_drvdata(serio, NULL);
+ input_free_device(input_dev);
+ kfree(wacom);
+ return err;
+}
+
+static struct serio_device_id wacom_serio_ids[] = {
+ {
+ .type = SERIO_RS232,
+ .proto = SERIO_WACOM_IV,
+ .id = SERIO_ANY,
+ .extra = SERIO_ANY,
+ },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, wacom_serio_ids);
+
+static struct serio_driver wacom_drv = {
+ .driver = {
+ .name = "wacom_serial4",
+ },
+ .description = "Wacom protocol 4 serial tablet driver",
+ .id_table = wacom_serio_ids,
+ .interrupt = wacom_interrupt,
+ .connect = wacom_connect,
+ .disconnect = wacom_disconnect,
+};
+
+module_serio_driver(wacom_drv);
* Atmel maXTouch Touchscreen driver
*
* Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Copyright (C) 2011-2014 Atmel Corporation
* Copyright (C) 2012 Google, Inc.
*
* Author: Joonyoung Shim <jy0922.shim@samsung.com>
#include <linux/i2c/atmel_mxt_ts.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
+#include <linux/of.h>
#include <linux/slab.h>
/* Version */
#define MXT_VER_21 21
#define MXT_VER_22 22
-/* Firmware */
+/* Firmware files */
#define MXT_FW_NAME "maxtouch.fw"
+#define MXT_CFG_NAME "maxtouch.cfg"
+#define MXT_CFG_MAGIC "OBP_RAW V1"
/* Registers */
#define MXT_INFO 0x00
#define MXT_OBJECT_START 0x07
#define MXT_OBJECT_SIZE 6
+#define MXT_INFO_CHECKSUM_SIZE 3
+#define MXT_MAX_BLOCK_WRITE 256
/* Object types */
#define MXT_DEBUG_DIAGNOSTIC_T37 37
#define MXT_SPT_MESSAGECOUNT_T44 44
#define MXT_SPT_CTECONFIG_T46 46
+/* MXT_GEN_MESSAGE_T5 object */
+#define MXT_RPTID_NOMSG 0xff
+
/* MXT_GEN_COMMAND_T6 field */
#define MXT_COMMAND_RESET 0
#define MXT_COMMAND_BACKUPNV 1
/* Define for T6 status byte */
#define MXT_T6_STATUS_RESET (1 << 7)
+#define MXT_T6_STATUS_OFL (1 << 6)
+#define MXT_T6_STATUS_SIGERR (1 << 5)
+#define MXT_T6_STATUS_CAL (1 << 4)
+#define MXT_T6_STATUS_CFGERR (1 << 3)
+#define MXT_T6_STATUS_COMSERR (1 << 2)
/* MXT_GEN_POWER_T7 field */
#define MXT_POWER_IDLEACQINT 0
u8 num_report_ids;
} __packed;
-struct mxt_message {
- u8 reportid;
- u8 message[7];
-};
-
/* Each client has this additional data */
struct mxt_data {
struct i2c_client *client;
unsigned int max_x;
unsigned int max_y;
bool in_bootloader;
+ u16 mem_size;
+ u8 max_reportid;
u32 config_crc;
+ u32 info_crc;
u8 bootloader_addr;
+ u8 *msg_buf;
+ u8 t6_status;
+ bool update_input;
+ u8 last_message_count;
+ u8 num_touchids;
/* Cached parameters from object table */
+ u16 T5_address;
+ u8 T5_msg_size;
u8 T6_reportid;
u16 T6_address;
+ u16 T7_address;
u8 T9_reportid_min;
u8 T9_reportid_max;
u8 T19_reportid;
+ u16 T44_address;
/* for fw update in bootloader */
struct completion bl_completion;
}
}
-static bool mxt_object_writable(unsigned int type)
-{
- switch (type) {
- case MXT_GEN_COMMAND_T6:
- case MXT_GEN_POWER_T7:
- case MXT_GEN_ACQUIRE_T8:
- case MXT_TOUCH_MULTI_T9:
- case MXT_TOUCH_KEYARRAY_T15:
- case MXT_TOUCH_PROXIMITY_T23:
- case MXT_TOUCH_PROXKEY_T52:
- case MXT_PROCI_GRIPFACE_T20:
- case MXT_PROCG_NOISE_T22:
- case MXT_PROCI_ONETOUCH_T24:
- case MXT_PROCI_TWOTOUCH_T27:
- case MXT_PROCI_GRIP_T40:
- case MXT_PROCI_PALM_T41:
- case MXT_PROCI_TOUCHSUPPRESSION_T42:
- case MXT_PROCI_STYLUS_T47:
- case MXT_PROCG_NOISESUPPRESSION_T48:
- case MXT_SPT_COMMSCONFIG_T18:
- case MXT_SPT_GPIOPWM_T19:
- case MXT_SPT_SELFTEST_T25:
- case MXT_SPT_CTECONFIG_T28:
- case MXT_SPT_DIGITIZER_T43:
- case MXT_SPT_CTECONFIG_T46:
- return true;
- default:
- return false;
- }
-}
-
-static void mxt_dump_message(struct device *dev,
- struct mxt_message *message)
+static void mxt_dump_message(struct mxt_data *data, u8 *message)
{
- dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
- message->reportid, 7, message->message);
+ dev_dbg(&data->client->dev, "message: %*ph\n",
+ data->T5_msg_size, message);
}
static int mxt_wait_for_completion(struct mxt_data *data,
return ret;
}
-static int mxt_lookup_bootloader_address(struct mxt_data *data)
+static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
{
u8 appmode = data->client->addr;
u8 bootloader;
switch (appmode) {
case 0x4a:
case 0x4b:
+ /* Chips after 1664S use different scheme */
+ if (retry || data->info.family_id >= 0xa2) {
+ bootloader = appmode - 0x24;
+ break;
+ }
+ /* Fall through for normal case */
case 0x4c:
case 0x4d:
case 0x5a:
return 0;
}
+static int mxt_probe_bootloader(struct mxt_data *data, bool retry)
+{
+ struct device *dev = &data->client->dev;
+ int ret;
+ u8 val;
+ bool crc_failure;
+
+ ret = mxt_lookup_bootloader_address(data, retry);
+ if (ret)
+ return ret;
+
+ ret = mxt_bootloader_read(data, &val, 1);
+ if (ret)
+ return ret;
+
+ /* Check app crc fail mode */
+ crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
+
+ dev_err(dev, "Detected bootloader, status:%02X%s\n",
+ val, crc_failure ? ", APP_CRC_FAIL" : "");
+
+ return 0;
+}
+
static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
{
struct device *dev = &data->client->dev;
}
}
-static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
+static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
+ bool wait)
{
struct device *dev = &data->client->dev;
u8 val;
int ret;
recheck:
- if (state != MXT_WAITING_BOOTLOAD_CMD) {
+ if (wait) {
/*
* In application update mode, the interrupt
* line signals state transitions. We must wait for the
switch (state) {
case MXT_WAITING_BOOTLOAD_CMD:
case MXT_WAITING_FRAME_DATA:
+ case MXT_APP_CRC_FAIL:
val &= ~MXT_BOOT_STATUS_MASK;
break;
case MXT_FRAME_CRC_PASS:
return 0;
}
-static int mxt_unlock_bootloader(struct mxt_data *data)
+static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
{
int ret;
u8 buf[2];
- buf[0] = MXT_UNLOCK_CMD_LSB;
- buf[1] = MXT_UNLOCK_CMD_MSB;
+ if (unlock) {
+ buf[0] = MXT_UNLOCK_CMD_LSB;
+ buf[1] = MXT_UNLOCK_CMD_MSB;
+ } else {
+ buf[0] = 0x01;
+ buf[1] = 0x01;
+ }
ret = mxt_bootloader_write(data, buf, 2);
if (ret)
return object;
}
- dev_err(&data->client->dev, "Invalid object type T%u\n", type);
+ dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
return NULL;
}
-static int mxt_read_message(struct mxt_data *data,
- struct mxt_message *message)
+static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
{
- struct mxt_object *object;
- u16 reg;
+ struct device *dev = &data->client->dev;
+ u8 status = msg[1];
+ u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
- object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
- if (!object)
- return -EINVAL;
+ complete(&data->crc_completion);
- reg = object->start_address;
- return __mxt_read_reg(data->client, reg,
- sizeof(struct mxt_message), message);
+ if (crc != data->config_crc) {
+ data->config_crc = crc;
+ dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
+ }
+
+ /* Detect reset */
+ if (status & MXT_T6_STATUS_RESET)
+ complete(&data->reset_completion);
+
+ /* Output debug if status has changed */
+ if (status != data->t6_status)
+ dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
+ status,
+ status == 0 ? " OK" : "",
+ status & MXT_T6_STATUS_RESET ? " RESET" : "",
+ status & MXT_T6_STATUS_OFL ? " OFL" : "",
+ status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
+ status & MXT_T6_STATUS_CAL ? " CAL" : "",
+ status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
+ status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
+
+ /* Save current status */
+ data->t6_status = status;
}
static int mxt_write_object(struct mxt_data *data,
return mxt_write_reg(data->client, reg + offset, val);
}
-static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
+static void mxt_input_button(struct mxt_data *data, u8 *message)
{
struct input_dev *input = data->input_dev;
const struct mxt_platform_data *pdata = data->pdata;
for (i = 0; i < pdata->t19_num_keys; i++) {
if (pdata->t19_keymap[i] == KEY_RESERVED)
continue;
- button = !(message->message[0] & (1 << i));
+ button = !(message[1] & (1 << i));
input_report_key(input, pdata->t19_keymap[i], button);
}
}
-static void mxt_input_sync(struct input_dev *input_dev)
+static void mxt_input_sync(struct mxt_data *data)
{
- input_mt_report_pointer_emulation(input_dev, false);
- input_sync(input_dev);
+ input_mt_report_pointer_emulation(data->input_dev,
+ data->pdata->t19_num_keys);
+ input_sync(data->input_dev);
}
-static void mxt_input_touchevent(struct mxt_data *data,
- struct mxt_message *message, int id)
+static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
{
struct device *dev = &data->client->dev;
- u8 status = message->message[0];
struct input_dev *input_dev = data->input_dev;
+ int id;
+ u8 status;
int x;
int y;
int area;
int amplitude;
- x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
- y = (message->message[2] << 4) | ((message->message[3] & 0xf));
+ id = message[0] - data->T9_reportid_min;
+ status = message[1];
+ x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
+ y = (message[3] << 4) | ((message[4] & 0xf));
/* Handle 10/12 bit switching */
if (data->max_x < 1024)
if (data->max_y < 1024)
y >>= 2;
- area = message->message[4];
- amplitude = message->message[5];
+ area = message[5];
+ amplitude = message[6];
dev_dbg(dev,
"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
if (status & MXT_T9_RELEASE) {
input_mt_report_slot_state(input_dev,
MT_TOOL_FINGER, 0);
- mxt_input_sync(input_dev);
+ mxt_input_sync(data);
}
/* Touch active */
/* Touch no longer active, close out slot */
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
}
+
+ data->update_input = true;
+}
+
+static int mxt_proc_message(struct mxt_data *data, u8 *message)
+{
+ u8 report_id = message[0];
+
+ if (report_id == MXT_RPTID_NOMSG)
+ return 0;
+
+ if (report_id == data->T6_reportid) {
+ mxt_proc_t6_messages(data, message);
+ } else if (!data->input_dev) {
+ /*
+ * Do not report events if input device
+ * is not yet registered.
+ */
+ mxt_dump_message(data, message);
+ } else if (report_id >= data->T9_reportid_min
+ && report_id <= data->T9_reportid_max) {
+ mxt_proc_t9_message(data, message);
+ } else if (report_id == data->T19_reportid) {
+ mxt_input_button(data, message);
+ data->update_input = true;
+ } else {
+ mxt_dump_message(data, message);
+ }
+
+ return 1;
}
-static u16 mxt_extract_T6_csum(const u8 *csum)
+static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
{
- return csum[0] | (csum[1] << 8) | (csum[2] << 16);
+ struct device *dev = &data->client->dev;
+ int ret;
+ int i;
+ u8 num_valid = 0;
+
+ /* Safety check for msg_buf */
+ if (count > data->max_reportid)
+ return -EINVAL;
+
+ /* Process remaining messages if necessary */
+ ret = __mxt_read_reg(data->client, data->T5_address,
+ data->T5_msg_size * count, data->msg_buf);
+ if (ret) {
+ dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
+ return ret;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mxt_proc_message(data,
+ data->msg_buf + data->T5_msg_size * i);
+
+ if (ret == 1)
+ num_valid++;
+ }
+
+ /* return number of messages read */
+ return num_valid;
}
-static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
+static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
{
- u8 id = msg->reportid;
- return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
+ struct device *dev = &data->client->dev;
+ int ret;
+ u8 count, num_left;
+
+ /* Read T44 and T5 together */
+ ret = __mxt_read_reg(data->client, data->T44_address,
+ data->T5_msg_size + 1, data->msg_buf);
+ if (ret) {
+ dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
+ return IRQ_NONE;
+ }
+
+ count = data->msg_buf[0];
+
+ if (count == 0) {
+ dev_warn(dev, "Interrupt triggered but zero messages\n");
+ return IRQ_NONE;
+ } else if (count > data->max_reportid) {
+ dev_err(dev, "T44 count %d exceeded max report id\n", count);
+ count = data->max_reportid;
+ }
+
+ /* Process first message */
+ ret = mxt_proc_message(data, data->msg_buf + 1);
+ if (ret < 0) {
+ dev_warn(dev, "Unexpected invalid message\n");
+ return IRQ_NONE;
+ }
+
+ num_left = count - 1;
+
+ /* Process remaining messages if necessary */
+ if (num_left) {
+ ret = mxt_read_and_process_messages(data, num_left);
+ if (ret < 0)
+ goto end;
+ else if (ret != num_left)
+ dev_warn(dev, "Unexpected invalid message\n");
+ }
+
+end:
+ if (data->update_input) {
+ mxt_input_sync(data);
+ data->update_input = false;
+ }
+
+ return IRQ_HANDLED;
}
-static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
+static int mxt_process_messages_until_invalid(struct mxt_data *data)
{
- struct mxt_message message;
- const u8 *payload = &message.message[0];
struct device *dev = &data->client->dev;
- u8 reportid;
- bool update_input = false;
- u32 crc;
+ int count, read;
+ u8 tries = 2;
+
+ count = data->max_reportid;
+ /* Read messages until we force an invalid */
do {
- if (mxt_read_message(data, &message)) {
- dev_err(dev, "Failed to read message\n");
- return IRQ_NONE;
- }
+ read = mxt_read_and_process_messages(data, count);
+ if (read < count)
+ return 0;
+ } while (--tries);
+
+ if (data->update_input) {
+ mxt_input_sync(data);
+ data->update_input = false;
+ }
- reportid = message.reportid;
+ dev_err(dev, "CHG pin isn't cleared\n");
+ return -EBUSY;
+}
- if (reportid == data->T6_reportid) {
- u8 status = payload[0];
+static irqreturn_t mxt_process_messages(struct mxt_data *data)
+{
+ int total_handled, num_handled;
+ u8 count = data->last_message_count;
- crc = mxt_extract_T6_csum(&payload[1]);
- if (crc != data->config_crc) {
- data->config_crc = crc;
- complete(&data->crc_completion);
- }
+ if (count < 1 || count > data->max_reportid)
+ count = 1;
- dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
- status, data->config_crc);
-
- if (status & MXT_T6_STATUS_RESET)
- complete(&data->reset_completion);
- } else if (mxt_is_T9_message(data, &message)) {
- int id = reportid - data->T9_reportid_min;
- mxt_input_touchevent(data, &message, id);
- update_input = true;
- } else if (message.reportid == data->T19_reportid) {
- mxt_input_button(data, &message);
- update_input = true;
- } else {
- mxt_dump_message(dev, &message);
- }
- } while (reportid != 0xff);
+ /* include final invalid message */
+ total_handled = mxt_read_and_process_messages(data, count + 1);
+ if (total_handled < 0)
+ return IRQ_NONE;
+ /* if there were invalid messages, then we are done */
+ else if (total_handled <= count)
+ goto update_count;
+
+ /* keep reading two msgs until one is invalid or reportid limit */
+ do {
+ num_handled = mxt_read_and_process_messages(data, 2);
+ if (num_handled < 0)
+ return IRQ_NONE;
+
+ total_handled += num_handled;
+
+ if (num_handled < 2)
+ break;
+ } while (total_handled < data->num_touchids);
- if (update_input)
- mxt_input_sync(data->input_dev);
+update_count:
+ data->last_message_count = total_handled;
+
+ if (data->update_input) {
+ mxt_input_sync(data);
+ data->update_input = false;
+ }
return IRQ_HANDLED;
}
return IRQ_HANDLED;
}
- return mxt_process_messages_until_invalid(data);
+ if (!data->object_table)
+ return IRQ_HANDLED;
+
+ if (data->T44_address) {
+ return mxt_process_messages_t44(data);
+ } else {
+ return mxt_process_messages(data);
+ }
}
static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
}
-static int mxt_check_reg_init(struct mxt_data *data)
+static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
+{
+ static const unsigned int crcpoly = 0x80001B;
+ u32 result;
+ u32 data_word;
+
+ data_word = (secondbyte << 8) | firstbyte;
+ result = ((*crc << 1) ^ data_word);
+
+ if (result & 0x1000000)
+ result ^= crcpoly;
+
+ *crc = result;
+}
+
+static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
+{
+ u32 crc = 0;
+ u8 *ptr = base + start_off;
+ u8 *last_val = base + end_off - 1;
+
+ if (end_off < start_off)
+ return -EINVAL;
+
+ while (ptr < last_val) {
+ mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
+ ptr += 2;
+ }
+
+ /* if len is odd, fill the last byte with 0 */
+ if (ptr == last_val)
+ mxt_calc_crc24(&crc, *ptr, 0);
+
+ /* Mask to 24-bit */
+ crc &= 0x00FFFFFF;
+
+ return crc;
+}
+
+/*
+ * mxt_update_cfg - download configuration to chip
+ *
+ * Atmel Raw Config File Format
+ *
+ * The first four lines of the raw config file contain:
+ * 1) Version
+ * 2) Chip ID Information (first 7 bytes of device memory)
+ * 3) Chip Information Block 24-bit CRC Checksum
+ * 4) Chip Configuration 24-bit CRC Checksum
+ *
+ * The rest of the file consists of one line per object instance:
+ * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
+ *
+ * <TYPE> - 2-byte object type as hex
+ * <INSTANCE> - 2-byte object instance number as hex
+ * <SIZE> - 2-byte object size as hex
+ * <CONTENTS> - array of <SIZE> 1-byte hex values
+ */
+static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
{
- const struct mxt_platform_data *pdata = data->pdata;
- struct mxt_object *object;
struct device *dev = &data->client->dev;
- int index = 0;
- int i, size;
+ struct mxt_info cfg_info;
+ struct mxt_object *object;
int ret;
+ int offset;
+ int data_pos;
+ int byte_offset;
+ int i;
+ int cfg_start_ofs;
+ u32 info_crc, config_crc, calculated_crc;
+ u8 *config_mem;
+ size_t config_mem_size;
+ unsigned int type, instance, size;
+ u8 val;
+ u16 reg;
- if (!pdata->config) {
- dev_dbg(dev, "No cfg data defined, skipping reg init\n");
- return 0;
+ mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
+
+ if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
+ dev_err(dev, "Unrecognised config file\n");
+ ret = -EINVAL;
+ goto release;
}
- mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
+ data_pos = strlen(MXT_CFG_MAGIC);
+
+ /* Load information block and check */
+ for (i = 0; i < sizeof(struct mxt_info); i++) {
+ ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ (unsigned char *)&cfg_info + i,
+ &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format\n");
+ ret = -EINVAL;
+ goto release;
+ }
- if (data->config_crc == pdata->config_crc) {
- dev_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc);
- return 0;
+ data_pos += offset;
}
- dev_info(dev, "Config CRC 0x%06X: does not match 0x%06X\n",
- data->config_crc, pdata->config_crc);
+ if (cfg_info.family_id != data->info.family_id) {
+ dev_err(dev, "Family ID mismatch!\n");
+ ret = -EINVAL;
+ goto release;
+ }
- for (i = 0; i < data->info.object_num; i++) {
- object = data->object_table + i;
+ if (cfg_info.variant_id != data->info.variant_id) {
+ dev_err(dev, "Variant ID mismatch!\n");
+ ret = -EINVAL;
+ goto release;
+ }
+
+ /* Read CRCs */
+ ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format: failed to parse Info CRC\n");
+ ret = -EINVAL;
+ goto release;
+ }
+ data_pos += offset;
+
+ ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format: failed to parse Config CRC\n");
+ ret = -EINVAL;
+ goto release;
+ }
+ data_pos += offset;
+
+ /*
+ * The Info Block CRC is calculated over mxt_info and the object
+ * table. If it does not match then we are trying to load the
+ * configuration from a different chip or firmware version, so
+ * the configuration CRC is invalid anyway.
+ */
+ if (info_crc == data->info_crc) {
+ if (config_crc == 0 || data->config_crc == 0) {
+ dev_info(dev, "CRC zero, attempting to apply config\n");
+ } else if (config_crc == data->config_crc) {
+ dev_dbg(dev, "Config CRC 0x%06X: OK\n",
+ data->config_crc);
+ ret = 0;
+ goto release;
+ } else {
+ dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
+ data->config_crc, config_crc);
+ }
+ } else {
+ dev_warn(dev,
+ "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
+ data->info_crc, info_crc);
+ }
+
+ /* Malloc memory to store configuration */
+ cfg_start_ofs = MXT_OBJECT_START +
+ data->info.object_num * sizeof(struct mxt_object) +
+ MXT_INFO_CHECKSUM_SIZE;
+ config_mem_size = data->mem_size - cfg_start_ofs;
+ config_mem = kzalloc(config_mem_size, GFP_KERNEL);
+ if (!config_mem) {
+ dev_err(dev, "Failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto release;
+ }
- if (!mxt_object_writable(object->type))
+ while (data_pos < cfg->size) {
+ /* Read type, instance, length */
+ ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
+ &type, &instance, &size, &offset);
+ if (ret == 0) {
+ /* EOF */
+ break;
+ } else if (ret != 3) {
+ dev_err(dev, "Bad format: failed to parse object\n");
+ ret = -EINVAL;
+ goto release_mem;
+ }
+ data_pos += offset;
+
+ object = mxt_get_object(data, type);
+ if (!object) {
+ /* Skip object */
+ for (i = 0; i < size; i++) {
+ ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ &val,
+ &offset);
+ data_pos += offset;
+ }
continue;
+ }
- size = mxt_obj_size(object) * mxt_obj_instances(object);
- if (index + size > pdata->config_length) {
- dev_err(dev, "Not enough config data!\n");
- return -EINVAL;
+ if (size > mxt_obj_size(object)) {
+ /*
+ * Either we are in fallback mode due to wrong
+ * config or config from a later fw version,
+ * or the file is corrupt or hand-edited.
+ */
+ dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
+ size - mxt_obj_size(object), type);
+ } else if (mxt_obj_size(object) > size) {
+ /*
+ * If firmware is upgraded, new bytes may be added to
+ * end of objects. It is generally forward compatible
+ * to zero these bytes - previous behaviour will be
+ * retained. However this does invalidate the CRC and
+ * will force fallback mode until the configuration is
+ * updated. We warn here but do nothing else - the
+ * malloc has zeroed the entire configuration.
+ */
+ dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
+ mxt_obj_size(object) - size, type);
}
- ret = __mxt_write_reg(data->client, object->start_address,
- size, &pdata->config[index]);
- if (ret)
- return ret;
- index += size;
+ if (instance >= mxt_obj_instances(object)) {
+ dev_err(dev, "Object instances exceeded!\n");
+ ret = -EINVAL;
+ goto release_mem;
+ }
+
+ reg = object->start_address + mxt_obj_size(object) * instance;
+
+ for (i = 0; i < size; i++) {
+ ret = sscanf(cfg->data + data_pos, "%hhx%n",
+ &val,
+ &offset);
+ if (ret != 1) {
+ dev_err(dev, "Bad format in T%d\n", type);
+ ret = -EINVAL;
+ goto release_mem;
+ }
+ data_pos += offset;
+
+ if (i > mxt_obj_size(object))
+ continue;
+
+ byte_offset = reg + i - cfg_start_ofs;
+
+ if ((byte_offset >= 0)
+ && (byte_offset <= config_mem_size)) {
+ *(config_mem + byte_offset) = val;
+ } else {
+ dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
+ reg, object->type, byte_offset);
+ ret = -EINVAL;
+ goto release_mem;
+ }
+ }
+ }
+
+ /* Calculate crc of the received configs (not the raw config file) */
+ if (data->T7_address < cfg_start_ofs) {
+ dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
+ data->T7_address, cfg_start_ofs);
+ ret = 0;
+ goto release_mem;
+ }
+
+ calculated_crc = mxt_calculate_crc(config_mem,
+ data->T7_address - cfg_start_ofs,
+ config_mem_size);
+
+ if (config_crc > 0 && (config_crc != calculated_crc))
+ dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
+ calculated_crc, config_crc);
+
+ /* Write configuration as blocks */
+ byte_offset = 0;
+ while (byte_offset < config_mem_size) {
+ size = config_mem_size - byte_offset;
+
+ if (size > MXT_MAX_BLOCK_WRITE)
+ size = MXT_MAX_BLOCK_WRITE;
+
+ ret = __mxt_write_reg(data->client,
+ cfg_start_ofs + byte_offset,
+ size, config_mem + byte_offset);
+ if (ret != 0) {
+ dev_err(dev, "Config write error, ret=%d\n", ret);
+ goto release_mem;
+ }
+
+ byte_offset += size;
}
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
ret = mxt_soft_reset(data);
if (ret)
- return ret;
+ goto release_mem;
dev_info(dev, "Config successfully updated\n");
- return 0;
+release_mem:
+ kfree(config_mem);
+release:
+ release_firmware(cfg);
+ return ret;
}
-static int mxt_make_highchg(struct mxt_data *data)
+static int mxt_acquire_irq(struct mxt_data *data)
{
- struct device *dev = &data->client->dev;
- struct mxt_message message;
- int count = 10;
int error;
- /* Read dummy message to make high CHG pin */
- do {
- error = mxt_read_message(data, &message);
- if (error)
- return error;
- } while (message.reportid != 0xff && --count);
+ enable_irq(data->irq);
- if (!count) {
- dev_err(dev, "CHG pin isn't cleared\n");
- return -EBUSY;
- }
+ error = mxt_process_messages_until_invalid(data);
+ if (error)
+ return error;
return 0;
}
return 0;
}
+static void mxt_free_object_table(struct mxt_data *data)
+{
+ input_unregister_device(data->input_dev);
+ data->input_dev = NULL;
+
+ kfree(data->object_table);
+ data->object_table = NULL;
+ kfree(data->msg_buf);
+ data->msg_buf = NULL;
+ data->T5_address = 0;
+ data->T5_msg_size = 0;
+ data->T6_reportid = 0;
+ data->T7_address = 0;
+ data->T9_reportid_min = 0;
+ data->T9_reportid_max = 0;
+ data->T19_reportid = 0;
+ data->T44_address = 0;
+ data->max_reportid = 0;
+}
+
static int mxt_get_object_table(struct mxt_data *data)
{
struct i2c_client *client = data->client;
size_t table_size;
+ struct mxt_object *object_table;
int error;
int i;
u8 reportid;
+ u16 end_address;
table_size = data->info.object_num * sizeof(struct mxt_object);
+ object_table = kzalloc(table_size, GFP_KERNEL);
+ if (!object_table) {
+ dev_err(&data->client->dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
- data->object_table);
- if (error)
+ object_table);
+ if (error) {
+ kfree(object_table);
return error;
+ }
/* Valid Report IDs start counting from 1 */
reportid = 1;
+ data->mem_size = 0;
for (i = 0; i < data->info.object_num; i++) {
- struct mxt_object *object = data->object_table + i;
+ struct mxt_object *object = object_table + i;
u8 min_id, max_id;
le16_to_cpus(&object->start_address);
min_id, max_id);
switch (object->type) {
+ case MXT_GEN_MESSAGE_T5:
+ if (data->info.family_id == 0x80) {
+ /*
+ * On mXT224 read and discard unused CRC byte
+ * otherwise DMA reads are misaligned
+ */
+ data->T5_msg_size = mxt_obj_size(object);
+ } else {
+ /* CRC not enabled, so skip last byte */
+ data->T5_msg_size = mxt_obj_size(object) - 1;
+ }
+ data->T5_address = object->start_address;
case MXT_GEN_COMMAND_T6:
data->T6_reportid = min_id;
data->T6_address = object->start_address;
break;
+ case MXT_GEN_POWER_T7:
+ data->T7_address = object->start_address;
+ break;
case MXT_TOUCH_MULTI_T9:
data->T9_reportid_min = min_id;
data->T9_reportid_max = max_id;
+ data->num_touchids = object->num_report_ids
+ * mxt_obj_instances(object);
+ break;
+ case MXT_SPT_MESSAGECOUNT_T44:
+ data->T44_address = object->start_address;
break;
case MXT_SPT_GPIOPWM_T19:
data->T19_reportid = min_id;
break;
}
+
+ end_address = object->start_address
+ + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
+
+ if (end_address >= data->mem_size)
+ data->mem_size = end_address + 1;
+ }
+
+ /* Store maximum reportid */
+ data->max_reportid = reportid;
+
+ /* If T44 exists, T5 position has to be directly after */
+ if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
+ dev_err(&client->dev, "Invalid T44 position\n");
+ error = -EINVAL;
+ goto free_object_table;
+ }
+
+ data->msg_buf = kcalloc(data->max_reportid,
+ data->T5_msg_size, GFP_KERNEL);
+ if (!data->msg_buf) {
+ dev_err(&client->dev, "Failed to allocate message buffer\n");
+ error = -ENOMEM;
+ goto free_object_table;
}
+ data->object_table = object_table;
+
return 0;
-}
-
-static void mxt_free_object_table(struct mxt_data *data)
-{
- kfree(data->object_table);
- data->object_table = NULL;
- data->T6_reportid = 0;
- data->T9_reportid_min = 0;
- data->T9_reportid_max = 0;
- data->T19_reportid = 0;
+
+free_object_table:
+ mxt_free_object_table(data);
+ return error;
}
static int mxt_read_t9_resolution(struct mxt_data *data)
return 0;
}
+static int mxt_input_open(struct input_dev *dev);
+static void mxt_input_close(struct input_dev *dev);
+
+static int mxt_initialize_t9_input_device(struct mxt_data *data)
+{
+ struct device *dev = &data->client->dev;
+ const struct mxt_platform_data *pdata = data->pdata;
+ struct input_dev *input_dev;
+ int error;
+ unsigned int num_mt_slots;
+ unsigned int mt_flags = 0;
+ int i;
+
+ error = mxt_read_t9_resolution(data);
+ if (error)
+ dev_warn(dev, "Failed to initialize T9 resolution\n");
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ input_dev->name = "Atmel maXTouch Touchscreen";
+ input_dev->phys = data->phys;
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->dev.parent = dev;
+ input_dev->open = mxt_input_open;
+ input_dev->close = mxt_input_close;
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+
+ if (pdata->t19_num_keys) {
+ __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+
+ for (i = 0; i < pdata->t19_num_keys; i++)
+ if (pdata->t19_keymap[i] != KEY_RESERVED)
+ input_set_capability(input_dev, EV_KEY,
+ pdata->t19_keymap[i]);
+
+ mt_flags |= INPUT_MT_POINTER;
+
+ input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
+ input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
+ input_abs_set_res(input_dev, ABS_MT_POSITION_X,
+ MXT_PIXELS_PER_MM);
+ input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
+ MXT_PIXELS_PER_MM);
+
+ input_dev->name = "Atmel maXTouch Touchpad";
+ }
+
+ /* For single touch */
+ input_set_abs_params(input_dev, ABS_X,
+ 0, data->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y,
+ 0, data->max_y, 0, 0);
+ input_set_abs_params(input_dev, ABS_PRESSURE,
+ 0, 255, 0, 0);
+
+ /* For multi touch */
+ num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
+ error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
+ if (error) {
+ dev_err(dev, "Error %d initialising slots\n", error);
+ goto err_free_mem;
+ }
+
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, MXT_MAX_AREA, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_X,
+ 0, data->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+ 0, data->max_y, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+ 0, 255, 0, 0);
+
+ input_set_drvdata(input_dev, data);
+
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(dev, "Error %d registering input device\n", error);
+ goto err_free_mem;
+ }
+
+ data->input_dev = input_dev;
+
+ return 0;
+
+err_free_mem:
+ input_free_device(input_dev);
+ return error;
+}
+
+static int mxt_configure_objects(struct mxt_data *data,
+ const struct firmware *cfg);
+
+static void mxt_config_cb(const struct firmware *cfg, void *ctx)
+{
+ mxt_configure_objects(ctx, cfg);
+}
+
static int mxt_initialize(struct mxt_data *data)
{
struct i2c_client *client = data->client;
- struct mxt_info *info = &data->info;
int error;
+ bool alt_bootloader_addr = false;
+ bool retry = false;
+retry_info:
error = mxt_get_info(data);
- if (error)
- return error;
+ if (error) {
+retry_bootloader:
+ error = mxt_probe_bootloader(data, alt_bootloader_addr);
+ if (error) {
+ if (alt_bootloader_addr) {
+ /* Chip is not in appmode or bootloader mode */
+ return error;
+ }
- data->object_table = kcalloc(info->object_num,
- sizeof(struct mxt_object),
- GFP_KERNEL);
- if (!data->object_table) {
- dev_err(&client->dev, "Failed to allocate memory\n");
- return -ENOMEM;
+ dev_info(&client->dev, "Trying alternate bootloader address\n");
+ alt_bootloader_addr = true;
+ goto retry_bootloader;
+ } else {
+ if (retry) {
+ dev_err(&client->dev, "Could not recover from bootloader mode\n");
+ /*
+ * We can reflash from this state, so do not
+ * abort init
+ */
+ data->in_bootloader = true;
+ return 0;
+ }
+
+ /* Attempt to exit bootloader into app mode */
+ mxt_send_bootloader_cmd(data, false);
+ msleep(MXT_FW_RESET_TIME);
+ retry = true;
+ goto retry_info;
+ }
}
/* Get object table information */
error = mxt_get_object_table(data);
if (error) {
dev_err(&client->dev, "Error %d reading object table\n", error);
- goto err_free_object_table;
+ return error;
}
- /* Check register init values */
- error = mxt_check_reg_init(data);
- if (error) {
- dev_err(&client->dev, "Error %d initializing configuration\n",
- error);
+ mxt_acquire_irq(data);
+ if (error)
goto err_free_object_table;
- }
- error = mxt_read_t9_resolution(data);
- if (error) {
- dev_err(&client->dev, "Failed to initialize T9 resolution\n");
- goto err_free_object_table;
+ request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
+ &data->client->dev, GFP_KERNEL, data,
+ mxt_config_cb);
+
+ return 0;
+
+err_free_object_table:
+ mxt_free_object_table(data);
+ return error;
+}
+
+static int mxt_configure_objects(struct mxt_data *data,
+ const struct firmware *cfg)
+{
+ struct device *dev = &data->client->dev;
+ struct mxt_info *info = &data->info;
+ int error;
+
+ if (cfg) {
+ error = mxt_update_cfg(data, cfg);
+ if (error)
+ dev_warn(dev, "Error %d updating config\n", error);
}
- dev_info(&client->dev,
+ error = mxt_initialize_t9_input_device(data);
+ if (error)
+ return error;
+
+ dev_info(dev,
"Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
info->family_id, info->variant_id, info->version >> 4,
info->version & 0xf, info->build, info->object_num);
return 0;
-
-err_free_object_table:
- mxt_free_object_table(data);
- return error;
}
/* Firmware Version is returned as Major.Minor.Build */
if (ret)
goto release_firmware;
- ret = mxt_lookup_bootloader_address(data);
- if (ret)
- goto release_firmware;
+ if (!data->in_bootloader) {
+ /* Change to the bootloader mode */
+ data->in_bootloader = true;
- /* Change to the bootloader mode */
- data->in_bootloader = true;
+ ret = mxt_t6_command(data, MXT_COMMAND_RESET,
+ MXT_BOOT_VALUE, false);
+ if (ret)
+ goto release_firmware;
- ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false);
- if (ret)
- goto release_firmware;
+ msleep(MXT_RESET_TIME);
- msleep(MXT_RESET_TIME);
+ /* Do not need to scan since we know family ID */
+ ret = mxt_lookup_bootloader_address(data, 0);
+ if (ret)
+ goto release_firmware;
+ } else {
+ enable_irq(data->irq);
+ }
+ mxt_free_object_table(data);
reinit_completion(&data->bl_completion);
- ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
- if (ret)
- goto disable_irq;
+ ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
+ if (ret) {
+ /* Bootloader may still be unlocked from previous attempt */
+ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
+ if (ret)
+ goto disable_irq;
+ } else {
+ dev_info(dev, "Unlocking bootloader\n");
- /* Unlock bootloader */
- mxt_unlock_bootloader(data);
+ /* Unlock bootloader */
+ ret = mxt_send_bootloader_cmd(data, true);
+ if (ret)
+ goto disable_irq;
+ }
while (pos < fw->size) {
- ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
+ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
if (ret)
goto disable_irq;
if (ret)
goto disable_irq;
- ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
+ ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
if (ret) {
retry++;
} else {
dev_info(dev, "The firmware update succeeded\n");
- mxt_free_object_table(data);
-
- mxt_initialize(data);
-
- enable_irq(data->irq);
-
- error = mxt_make_highchg(data);
+ error = mxt_initialize(data);
if (error)
return error;
}
mxt_stop(data);
}
-static int mxt_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+#ifdef CONFIG_OF
+static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
+{
+ struct mxt_platform_data *pdata;
+ u32 *keymap;
+ u32 keycode;
+ int proplen, i, ret;
+
+ if (!client->dev.of_node)
+ return ERR_PTR(-ENODEV);
+
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
+ &proplen)) {
+ pdata->t19_num_keys = proplen / sizeof(u32);
+
+ keymap = devm_kzalloc(&client->dev,
+ pdata->t19_num_keys * sizeof(keymap[0]),
+ GFP_KERNEL);
+ if (!keymap)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; i < pdata->t19_num_keys; i++) {
+ ret = of_property_read_u32_index(client->dev.of_node,
+ "linux,gpio-keymap", i, &keycode);
+ if (ret)
+ keycode = KEY_RESERVED;
+
+ keymap[i] = keycode;
+ }
+
+ pdata->t19_keymap = keymap;
+ }
+
+ return pdata;
+}
+#else
+static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
+{
+ dev_dbg(&client->dev, "No platform data specified\n");
+ return ERR_PTR(-EINVAL);
+}
+#endif
+
+static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
- const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
struct mxt_data *data;
- struct input_dev *input_dev;
+ const struct mxt_platform_data *pdata;
int error;
- unsigned int num_mt_slots;
- unsigned int mt_flags = 0;
- int i;
- if (!pdata)
- return -EINVAL;
+ pdata = dev_get_platdata(&client->dev);
+ if (!pdata) {
+ pdata = mxt_parse_dt(client);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!data || !input_dev) {
+ if (!data) {
dev_err(&client->dev, "Failed to allocate memory\n");
- error = -ENOMEM;
- goto err_free_mem;
+ return -ENOMEM;
}
- input_dev->name = "Atmel maXTouch Touchscreen";
snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
client->adapter->nr, client->addr);
- input_dev->phys = data->phys;
-
- input_dev->id.bustype = BUS_I2C;
- input_dev->dev.parent = &client->dev;
- input_dev->open = mxt_input_open;
- input_dev->close = mxt_input_close;
-
data->client = client;
- data->input_dev = input_dev;
data->pdata = pdata;
data->irq = client->irq;
+ i2c_set_clientdata(client, data);
init_completion(&data->bl_completion);
init_completion(&data->reset_completion);
init_completion(&data->crc_completion);
- error = mxt_initialize(data);
- if (error)
- goto err_free_mem;
-
- __set_bit(EV_ABS, input_dev->evbit);
- __set_bit(EV_KEY, input_dev->evbit);
- __set_bit(BTN_TOUCH, input_dev->keybit);
-
- if (pdata->t19_num_keys) {
- __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
-
- for (i = 0; i < pdata->t19_num_keys; i++)
- if (pdata->t19_keymap[i] != KEY_RESERVED)
- input_set_capability(input_dev, EV_KEY,
- pdata->t19_keymap[i]);
-
- mt_flags |= INPUT_MT_POINTER;
-
- input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
- input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
- input_abs_set_res(input_dev, ABS_MT_POSITION_X,
- MXT_PIXELS_PER_MM);
- input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
- MXT_PIXELS_PER_MM);
-
- input_dev->name = "Atmel maXTouch Touchpad";
- }
-
- /* For single touch */
- input_set_abs_params(input_dev, ABS_X,
- 0, data->max_x, 0, 0);
- input_set_abs_params(input_dev, ABS_Y,
- 0, data->max_y, 0, 0);
- input_set_abs_params(input_dev, ABS_PRESSURE,
- 0, 255, 0, 0);
-
- /* For multi touch */
- num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
- error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
- if (error)
- goto err_free_object;
- input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
- 0, MXT_MAX_AREA, 0, 0);
- input_set_abs_params(input_dev, ABS_MT_POSITION_X,
- 0, data->max_x, 0, 0);
- input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
- 0, data->max_y, 0, 0);
- input_set_abs_params(input_dev, ABS_MT_PRESSURE,
- 0, 255, 0, 0);
-
- input_set_drvdata(input_dev, data);
- i2c_set_clientdata(client, data);
-
error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
pdata->irqflags | IRQF_ONESHOT,
client->name, data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_free_object;
+ goto err_free_mem;
}
- error = mxt_make_highchg(data);
- if (error)
- goto err_free_irq;
+ disable_irq(client->irq);
- error = input_register_device(input_dev);
- if (error) {
- dev_err(&client->dev, "Error %d registering input device\n",
- error);
+ error = mxt_initialize(data);
+ if (error)
goto err_free_irq;
- }
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
if (error) {
dev_err(&client->dev, "Failure %d creating sysfs group\n",
error);
- goto err_unregister_device;
+ goto err_free_object;
}
return 0;
-err_unregister_device:
- input_unregister_device(input_dev);
- input_dev = NULL;
+err_free_object:
+ mxt_free_object_table(data);
err_free_irq:
free_irq(client->irq, data);
-err_free_object:
- kfree(data->object_table);
err_free_mem:
- input_free_device(input_dev);
kfree(data);
return error;
}
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
free_irq(data->irq, data);
input_unregister_device(data->input_dev);
- kfree(data->object_table);
+ mxt_free_object_table(data);
kfree(data);
return 0;
static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
+static const struct of_device_id mxt_of_match[] = {
+ { .compatible = "atmel,maxtouch", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mxt_of_match);
+
static const struct i2c_device_id mxt_id[] = {
{ "qt602240_ts", 0 },
{ "atmel_mxt_ts", 0 },
.driver = {
.name = "atmel_mxt_ts",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mxt_of_match),
.pm = &mxt_pm_ops,
},
.probe = mxt_probe,
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