Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
authorLinus Torvalds <torvalds@linux-foundation.org>
Sat, 6 Aug 2016 03:24:15 +0000 (23:24 -0400)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 6 Aug 2016 03:24:15 +0000 (23:24 -0400)
Pull more input updates from Dmitry Torokhov:
 "Two new drivers for touchscreen controllers:

   - Silead touchscreen controllers
   - SiS 9200 family touchscreen controllers

  and a few driver fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: silead - remove some dead code
  Input: sis-i2c - select CONFIG_CRC_ITU_T
  Input: add driver for SiS 9200 family I2C touchscreen controllers
  Input: ili210x - fix permissions on "calibrate" attribute
  Input: elan_i2c - properly wake up touchpad on ASUS laptops
  Input: add driver for Silead touchscreens
  Input: elantech - fix debug dump of the current packet
  Input: rotary_encoder - support binary encoding of states
  Input: xpad - power off wireless 360 controllers on suspend
  Input: i8042 - break load dependency between atkbd/psmouse and i8042
  Input: synaptics-rmi4 - do not check for NULL when calling of_node_put()
  Input: cros_ec_keyb - cleanup use of dev

19 files changed:
Documentation/devicetree/bindings/input/rotary-encoder.txt
Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt [new file with mode: 0644]
Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt [new file with mode: 0644]
Documentation/devicetree/bindings/vendor-prefixes.txt
drivers/input/joystick/xpad.c
drivers/input/keyboard/cros_ec_keyb.c
drivers/input/misc/rotary_encoder.c
drivers/input/mouse/elan_i2c_core.c
drivers/input/mouse/elantech.c
drivers/input/rmi4/rmi_bus.c
drivers/input/serio/i8042.c
drivers/input/serio/libps2.c
drivers/input/touchscreen/Kconfig
drivers/input/touchscreen/Makefile
drivers/input/touchscreen/ili210x.c
drivers/input/touchscreen/silead.c [new file with mode: 0644]
drivers/input/touchscreen/sis_i2c.c [new file with mode: 0644]
include/linux/i8042.h
include/linux/serio.h

index 6c9f0c8a846c89a18532d56c488b7b133327113b..e85ce3dea4806bfbf9769d27514458603166e632 100644 (file)
@@ -20,6 +20,8 @@ Optional properties:
   2: Half-period mode
   4: Quarter-period mode
 - wakeup-source: Boolean, rotary encoder can wake up the system.
+- rotary-encoder,encoding: String, the method used to encode steps.
+  Supported are "gray" (the default and more common) and "binary".
 
 Deprecated properties:
 - rotary-encoder,half-period: Makes the driver work on half-period mode.
@@ -34,6 +36,7 @@ Example:
                        compatible = "rotary-encoder";
                        gpios = <&gpio 19 1>, <&gpio 20 0>; /* GPIO19 is inverted */
                        linux,axis = <0>; /* REL_X */
+                       rotary-encoder,encoding = "gray";
                        rotary-encoder,relative-axis;
                };
 
@@ -42,5 +45,6 @@ Example:
                        gpios = <&gpio 21 0>, <&gpio 22 0>;
                        linux,axis = <1>; /* ABS_Y */
                        rotary-encoder,steps = <24>;
+                       rotary-encoder,encoding = "binary";
                        rotary-encoder,rollover;
                };
diff --git a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
new file mode 100644 (file)
index 0000000..1112e0d
--- /dev/null
@@ -0,0 +1,36 @@
+* GSL 1680 touchscreen controller
+
+Required properties:
+- compatible             : "silead,gsl1680"
+- reg                    : I2C slave address of the chip (0x40)
+- interrupt-parent       : a phandle pointing to the interrupt controller
+                           serving the interrupt for this chip
+- interrupts             : interrupt specification for the gsl1680 interrupt
+- power-gpios            : Specification for the pin connected to the gsl1680's
+                           shutdown input. This needs to be driven high to take the
+                           gsl1680 out of its low power state
+- touchscreen-size-x     : See touchscreen.txt
+- touchscreen-size-y     : See touchscreen.txt
+
+Optional properties:
+- touchscreen-inverted-x  : See touchscreen.txt
+- touchscreen-inverted-y  : See touchscreen.txt
+- touchscreen-swapped-x-y : See touchscreen.txt
+- silead,max-fingers     : maximum number of fingers the touchscreen can detect
+
+Example:
+
+i2c@00000000 {
+       gsl1680: touchscreen@40 {
+               compatible = "silead,gsl1680";
+               reg = <0x40>;
+               interrupt-parent = <&pio>;
+               interrupts = <6 11 IRQ_TYPE_EDGE_FALLING>;
+               power-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>;
+               touchscreen-size-x = <480>;
+               touchscreen-size-y = <800>;
+               touchscreen-inverted-x;
+               touchscreen-swapped-x-y;
+               silead,max-fingers = <5>;
+       };
+};
diff --git a/Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt b/Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt
new file mode 100644 (file)
index 0000000..d87ad14
--- /dev/null
@@ -0,0 +1,33 @@
+* SiS I2C Multiple Touch Controller
+
+Required properties:
+- compatible: must be "sis,9200-ts"
+- reg: i2c slave address
+- interrupt-parent: the phandle for the interrupt controller
+  (see interrupt binding [0])
+- interrupts: touch controller interrupt (see interrupt
+  binding [0])
+
+Optional properties:
+- pinctrl-names: should be "default" (see pinctrl binding [1]).
+- pinctrl-0: a phandle pointing to the pin settings for the
+  device (see pinctrl binding [1]).
+- attn-gpios: the gpio pin used as attention line
+- reset-gpios: the gpio pin used to reset the controller
+- wakeup-source: touchscreen can be used as a wakeup source
+
+[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+
+Example:
+
+       sis9255@5c  {
+               compatible = "sis,9200-ts";
+               reg = <0x5c>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_sis>;
+               interrupt-parent = <&gpio3>;
+               interrupts = <19 IRQ_TYPE_EDGE_FALLING>;
+               irq-gpios = <&gpio3 19 GPIO_ACTIVE_LOW>;
+               reset-gpios = <&gpio2 30 GPIO_ACTIVE_LOW>;
+       };
index 68391a462c0a52c8b96d66edc55b863af8e7d974..1992aa97d45ac8b0a9cfaefbaf5de40780c601ad 100644 (file)
@@ -238,6 +238,7 @@ simtek
 sii    Seiko Instruments, Inc.
 silergy        Silergy Corp.
 sirf   SiRF Technology, Inc.
+sis    Silicon Integrated Systems Corp.
 sitronix       Sitronix Technology Corporation
 skyworks       Skyworks Solutions, Inc.
 smsc   Standard Microsystems Corporation
index a529a4535457217e761fd1e8f8b0748cb48a5498..83af17ad0f1f131d6d397e3df2e15521d0c24b55 100644 (file)
@@ -115,6 +115,10 @@ static bool sticks_to_null;
 module_param(sticks_to_null, bool, S_IRUGO);
 MODULE_PARM_DESC(sticks_to_null, "Do not map sticks at all for unknown pads");
 
+static bool auto_poweroff = true;
+module_param(auto_poweroff, bool, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(auto_poweroff, "Power off wireless controllers on suspend");
+
 static const struct xpad_device {
        u16 idVendor;
        u16 idProduct;
@@ -1248,6 +1252,36 @@ static void xpad_stop_input(struct usb_xpad *xpad)
        usb_kill_urb(xpad->irq_in);
 }
 
+static void xpad360w_poweroff_controller(struct usb_xpad *xpad)
+{
+       unsigned long flags;
+       struct xpad_output_packet *packet =
+                       &xpad->out_packets[XPAD_OUT_CMD_IDX];
+
+       spin_lock_irqsave(&xpad->odata_lock, flags);
+
+       packet->data[0] = 0x00;
+       packet->data[1] = 0x00;
+       packet->data[2] = 0x08;
+       packet->data[3] = 0xC0;
+       packet->data[4] = 0x00;
+       packet->data[5] = 0x00;
+       packet->data[6] = 0x00;
+       packet->data[7] = 0x00;
+       packet->data[8] = 0x00;
+       packet->data[9] = 0x00;
+       packet->data[10] = 0x00;
+       packet->data[11] = 0x00;
+       packet->len = 12;
+       packet->pending = true;
+
+       /* Reset the sequence so we send out poweroff now */
+       xpad->last_out_packet = -1;
+       xpad_try_sending_next_out_packet(xpad);
+
+       spin_unlock_irqrestore(&xpad->odata_lock, flags);
+}
+
 static int xpad360w_start_input(struct usb_xpad *xpad)
 {
        int error;
@@ -1590,6 +1624,15 @@ static int xpad_suspend(struct usb_interface *intf, pm_message_t message)
                 * or goes away.
                 */
                xpad360w_stop_input(xpad);
+
+               /*
+                * The wireless adapter is going off now, so the
+                * gamepads are going to become disconnected.
+                * Unless explicitly disabled, power them down
+                * so they don't just sit there flashing.
+                */
+               if (auto_poweroff && xpad->pad_present)
+                       xpad360w_poweroff_controller(xpad);
        } else {
                mutex_lock(&input->mutex);
                if (input->users)
index b01966dc7eb3db697c6313b4963e79912990b98f..4b0878f3547171044600bd85d9a0c24c66accd3a 100644 (file)
@@ -186,7 +186,7 @@ static irqreturn_t cros_ec_keyb_irq(int irq, void *data)
        if (ret >= 0)
                cros_ec_keyb_process(ckdev, kb_state, ret);
        else
-               dev_err(ec->dev, "failed to get keyboard state: %d\n", ret);
+               dev_err(ckdev->dev, "failed to get keyboard state: %d\n", ret);
 
        return IRQ_HANDLED;
 }
@@ -236,7 +236,7 @@ static void cros_ec_keyb_compute_valid_keys(struct cros_ec_keyb *ckdev)
 static int cros_ec_keyb_probe(struct platform_device *pdev)
 {
        struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
-       struct device *dev = ec->dev;
+       struct device *dev = &pdev->dev;
        struct cros_ec_keyb *ckdev;
        struct input_dev *idev;
        struct device_node *np;
@@ -246,23 +246,22 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
        if (!np)
                return -ENODEV;
 
-       ckdev = devm_kzalloc(&pdev->dev, sizeof(*ckdev), GFP_KERNEL);
+       ckdev = devm_kzalloc(dev, sizeof(*ckdev), GFP_KERNEL);
        if (!ckdev)
                return -ENOMEM;
-       err = matrix_keypad_parse_of_params(&pdev->dev, &ckdev->rows,
-                                           &ckdev->cols);
+       err = matrix_keypad_parse_of_params(dev, &ckdev->rows, &ckdev->cols);
        if (err)
                return err;
 
-       ckdev->valid_keys = devm_kzalloc(&pdev->dev, ckdev->cols, GFP_KERNEL);
+       ckdev->valid_keys = devm_kzalloc(dev, ckdev->cols, GFP_KERNEL);
        if (!ckdev->valid_keys)
                return -ENOMEM;
 
-       ckdev->old_kb_state = devm_kzalloc(&pdev->dev, ckdev->cols, GFP_KERNEL);
+       ckdev->old_kb_state = devm_kzalloc(dev, ckdev->cols, GFP_KERNEL);
        if (!ckdev->old_kb_state)
                return -ENOMEM;
 
-       idev = devm_input_allocate_device(&pdev->dev);
+       idev = devm_input_allocate_device(dev);
        if (!idev)
                return -ENOMEM;
 
@@ -273,7 +272,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
 
        ckdev->ec = ec;
        ckdev->dev = dev;
-       dev_set_drvdata(&pdev->dev, ckdev);
+       dev_set_drvdata(dev, ckdev);
 
        idev->name = CROS_EC_DEV_NAME;
        idev->phys = ec->phys_name;
@@ -282,7 +281,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
        idev->id.bustype = BUS_VIRTUAL;
        idev->id.version = 1;
        idev->id.product = 0;
-       idev->dev.parent = &pdev->dev;
+       idev->dev.parent = dev;
        idev->open = cros_ec_keyb_open;
        idev->close = cros_ec_keyb_close;
 
index c7fc8d4fb08034fec95eb3e6e6f98f960d5262e6..1588aecafff79d8fdb54d80b7fa03a2ee9036f00 100644 (file)
 
 #define DRV_NAME "rotary-encoder"
 
+enum rotary_encoder_encoding {
+       ROTENC_GRAY,
+       ROTENC_BINARY,
+};
+
 struct rotary_encoder {
        struct input_dev *input;
 
@@ -37,6 +42,7 @@ struct rotary_encoder {
        u32 axis;
        bool relative_axis;
        bool rollover;
+       enum rotary_encoder_encoding encoding;
 
        unsigned int pos;
 
@@ -57,8 +63,9 @@ static unsigned int rotary_encoder_get_state(struct rotary_encoder *encoder)
 
        for (i = 0; i < encoder->gpios->ndescs; ++i) {
                int val = gpiod_get_value_cansleep(encoder->gpios->desc[i]);
+
                /* convert from gray encoding to normal */
-               if (ret & 1)
+               if (encoder->encoding == ROTENC_GRAY && ret & 1)
                        val = !val;
 
                ret = ret << 1 | val;
@@ -213,6 +220,20 @@ static int rotary_encoder_probe(struct platform_device *pdev)
        encoder->rollover =
                device_property_read_bool(dev, "rotary-encoder,rollover");
 
+       if (!device_property_present(dev, "rotary-encoder,encoding") ||
+           !device_property_match_string(dev, "rotary-encoder,encoding",
+                                         "gray")) {
+               dev_info(dev, "gray");
+               encoder->encoding = ROTENC_GRAY;
+       } else if (!device_property_match_string(dev, "rotary-encoder,encoding",
+                                                "binary")) {
+               dev_info(dev, "binary");
+               encoder->encoding = ROTENC_BINARY;
+       } else {
+               dev_err(dev, "unknown encoding setting\n");
+               return -EINVAL;
+       }
+
        device_property_read_u32(dev, "linux,axis", &encoder->axis);
        encoder->relative_axis =
                device_property_read_bool(dev, "rotary-encoder,relative-axis");
index 2f589857a0395d8c48f685f47bd1c9ceb8445213..d15b338130213c53489baa600d6dcea1500790d4 100644 (file)
@@ -4,7 +4,8 @@
  * Copyright (c) 2013 ELAN Microelectronics Corp.
  *
  * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw>
- * Version: 1.6.0
+ * Author: KT Liao <kt.liao@emc.com.tw>
+ * Version: 1.6.2
  *
  * Based on cyapa driver:
  * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
@@ -40,7 +41,7 @@
 #include "elan_i2c.h"
 
 #define DRIVER_NAME            "elan_i2c"
-#define ELAN_DRIVER_VERSION    "1.6.1"
+#define ELAN_DRIVER_VERSION    "1.6.2"
 #define ELAN_VENDOR_ID         0x04f3
 #define ETP_MAX_PRESSURE       255
 #define ETP_FWIDTH_REDUCE      90
@@ -199,9 +200,41 @@ static int elan_sleep(struct elan_tp_data *data)
        return error;
 }
 
+static int elan_query_product(struct elan_tp_data *data)
+{
+       int error;
+
+       error = data->ops->get_product_id(data->client, &data->product_id);
+       if (error)
+               return error;
+
+       error = data->ops->get_sm_version(data->client, &data->ic_type,
+                                         &data->sm_version);
+       if (error)
+               return error;
+
+       return 0;
+}
+
+static int elan_check_ASUS_special_fw(struct elan_tp_data *data)
+{
+       if (data->ic_type != 0x0E)
+               return false;
+
+       switch (data->product_id) {
+       case 0x05 ... 0x07:
+       case 0x09:
+       case 0x13:
+               return true;
+       default:
+               return false;
+       }
+}
+
 static int __elan_initialize(struct elan_tp_data *data)
 {
        struct i2c_client *client = data->client;
+       bool woken_up = false;
        int error;
 
        error = data->ops->initialize(client);
@@ -210,6 +243,27 @@ static int __elan_initialize(struct elan_tp_data *data)
                return error;
        }
 
+       error = elan_query_product(data);
+       if (error)
+               return error;
+
+       /*
+        * Some ASUS devices were shipped with firmware that requires
+        * touchpads to be woken up first, before attempting to switch
+        * them into absolute reporting mode.
+        */
+       if (elan_check_ASUS_special_fw(data)) {
+               error = data->ops->sleep_control(client, false);
+               if (error) {
+                       dev_err(&client->dev,
+                               "failed to wake device up: %d\n", error);
+                       return error;
+               }
+
+               msleep(200);
+               woken_up = true;
+       }
+
        data->mode |= ETP_ENABLE_ABS;
        error = data->ops->set_mode(client, data->mode);
        if (error) {
@@ -218,11 +272,13 @@ static int __elan_initialize(struct elan_tp_data *data)
                return error;
        }
 
-       error = data->ops->sleep_control(client, false);
-       if (error) {
-               dev_err(&client->dev,
-                       "failed to wake device up: %d\n", error);
-               return error;
+       if (!woken_up) {
+               error = data->ops->sleep_control(client, false);
+               if (error) {
+                       dev_err(&client->dev,
+                               "failed to wake device up: %d\n", error);
+                       return error;
+               }
        }
 
        return 0;
@@ -248,10 +304,6 @@ static int elan_query_device_info(struct elan_tp_data *data)
 {
        int error;
 
-       error = data->ops->get_product_id(data->client, &data->product_id);
-       if (error)
-               return error;
-
        error = data->ops->get_version(data->client, false, &data->fw_version);
        if (error)
                return error;
@@ -261,11 +313,6 @@ static int elan_query_device_info(struct elan_tp_data *data)
        if (error)
                return error;
 
-       error = data->ops->get_sm_version(data->client, &data->ic_type,
-                                         &data->sm_version);
-       if (error)
-               return error;
-
        error = data->ops->get_version(data->client, true, &data->iap_version);
        if (error)
                return error;
index 615d23ec0d8e2c9bfaa7a69cf22b924a2de59ed4..08e252a424802df0885711509e3e26528ec7b7ba 100644 (file)
@@ -222,12 +222,8 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
  */
 static void elantech_packet_dump(struct psmouse *psmouse)
 {
-       int     i;
-
-       psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [");
-       for (i = 0; i < psmouse->pktsize; i++)
-               printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]);
-       printk("]\n");
+       psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n",
+                      psmouse->pktsize, psmouse->packet);
 }
 
 /*
index 253df96be4276cc9196a6c0ab25b04f838d061ac..a73580654c6b0cd3fd8faaeda2322bf88fdcd1ed 100644 (file)
@@ -232,10 +232,7 @@ err_put_device:
 void rmi_unregister_function(struct rmi_function *fn)
 {
        device_del(&fn->dev);
-
-       if (fn->dev.of_node)
-               of_node_put(fn->dev.of_node);
-
+       of_node_put(fn->dev.of_node);
        put_device(&fn->dev);
 }
 
index 454195709a824b3e5a346b3aa9e087672dccdcae..b4d34086e73f5aac0654e607028f13f59ef771be 100644 (file)
@@ -1277,6 +1277,7 @@ static int __init i8042_create_kbd_port(void)
        serio->start            = i8042_start;
        serio->stop             = i8042_stop;
        serio->close            = i8042_port_close;
+       serio->ps2_cmd_mutex    = &i8042_mutex;
        serio->port_data        = port;
        serio->dev.parent       = &i8042_platform_device->dev;
        strlcpy(serio->name, "i8042 KBD port", sizeof(serio->name));
@@ -1373,21 +1374,6 @@ static void i8042_unregister_ports(void)
        }
 }
 
-/*
- * Checks whether port belongs to i8042 controller.
- */
-bool i8042_check_port_owner(const struct serio *port)
-{
-       int i;
-
-       for (i = 0; i < I8042_NUM_PORTS; i++)
-               if (i8042_ports[i].serio == port)
-                       return true;
-
-       return false;
-}
-EXPORT_SYMBOL(i8042_check_port_owner);
-
 static void i8042_free_irqs(void)
 {
        if (i8042_aux_irq_registered)
index 316f2c8971011dae527d506ee18d49ce96f316e0..83e9c663aa6727da129d2fe8b0256f73f4581d53 100644 (file)
@@ -56,19 +56,17 @@ EXPORT_SYMBOL(ps2_sendbyte);
 
 void ps2_begin_command(struct ps2dev *ps2dev)
 {
-       mutex_lock(&ps2dev->cmd_mutex);
+       struct mutex *m = ps2dev->serio->ps2_cmd_mutex ?: &ps2dev->cmd_mutex;
 
-       if (i8042_check_port_owner(ps2dev->serio))
-               i8042_lock_chip();
+       mutex_lock(m);
 }
 EXPORT_SYMBOL(ps2_begin_command);
 
 void ps2_end_command(struct ps2dev *ps2dev)
 {
-       if (i8042_check_port_owner(ps2dev->serio))
-               i8042_unlock_chip();
+       struct mutex *m = ps2dev->serio->ps2_cmd_mutex ?: &ps2dev->cmd_mutex;
 
-       mutex_unlock(&ps2dev->cmd_mutex);
+       mutex_unlock(m);
 }
 EXPORT_SYMBOL(ps2_end_command);
 
index ee02dc7422bd1a9c03d9171b83a75e3032144bc5..2fb1f430a4318fcddf65a85a813aae96861da09c 100644 (file)
@@ -1059,6 +1059,31 @@ config TOUCHSCREEN_RM_TS
          To compile this driver as a module, choose M here: the
          module will be called raydium_i2c_ts.
 
+config TOUCHSCREEN_SILEAD
+       tristate "Silead I2C touchscreen"
+       depends on I2C
+       help
+         Say Y here if you have the Silead touchscreen connected to
+         your system.
+
+         If unsure, say N.
+
+         To compile this driver as a module, choose M here: the
+         module will be called silead.
+
+config TOUCHSCREEN_SIS_I2C
+       tristate "SiS 9200 family I2C touchscreen"
+       depends on I2C
+       select CRC_ITU_T
+       depends on GPIOLIB || COMPILE_TEST
+       help
+         This enables support for SiS 9200 family over I2C based touchscreens.
+
+         If unsure, say N.
+
+         To compile this driver as a module, choose M here: the
+         module will be called sis_i2c.
+
 config TOUCHSCREEN_ST1232
        tristate "Sitronix ST1232 touchscreen controllers"
        depends on I2C
index 3315882905f7a74fffa83846133ff8643642e4e1..b4373d6be4021687c1f4fc4b4bc0faa054141ec0 100644 (file)
@@ -64,6 +64,8 @@ obj-$(CONFIG_TOUCHSCREEN_PENMOUNT)    += penmount.o
 obj-$(CONFIG_TOUCHSCREEN_PIXCIR)       += pixcir_i2c_ts.o
 obj-$(CONFIG_TOUCHSCREEN_RM_TS)                += raydium_i2c_ts.o
 obj-$(CONFIG_TOUCHSCREEN_S3C2410)      += s3c2410_ts.o
+obj-$(CONFIG_TOUCHSCREEN_SILEAD)       += silead.o
+obj-$(CONFIG_TOUCHSCREEN_SIS_I2C)      += sis_i2c.o
 obj-$(CONFIG_TOUCHSCREEN_ST1232)       += st1232.o
 obj-$(CONFIG_TOUCHSCREEN_STMPE)                += stmpe-ts.o
 obj-$(CONFIG_TOUCHSCREEN_SUN4I)                += sun4i-ts.o
index ddf694b9fffc42380889450005caaa538d2cf423..fe4848bd1f4c3ecc564a9eaa479f029f4e590c45 100644 (file)
@@ -169,7 +169,7 @@ static ssize_t ili210x_calibrate(struct device *dev,
 
        return count;
 }
-static DEVICE_ATTR(calibrate, 0644, NULL, ili210x_calibrate);
+static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate);
 
 static struct attribute *ili210x_attributes[] = {
        &dev_attr_calibrate.attr,
diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
new file mode 100644 (file)
index 0000000..7379fe1
--- /dev/null
@@ -0,0 +1,565 @@
+/* -------------------------------------------------------------------------
+ * Copyright (C) 2014-2015, Intel Corporation
+ *
+ * Derived from:
+ *  gslX68X.c
+ *  Copyright (C) 2010-2015, Shanghai Sileadinc Co.Ltd
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * -------------------------------------------------------------------------
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/pm.h>
+#include <linux/irq.h>
+
+#include <asm/unaligned.h>
+
+#define SILEAD_TS_NAME         "silead_ts"
+
+#define SILEAD_REG_RESET       0xE0
+#define SILEAD_REG_DATA                0x80
+#define SILEAD_REG_TOUCH_NR    0x80
+#define SILEAD_REG_POWER       0xBC
+#define SILEAD_REG_CLOCK       0xE4
+#define SILEAD_REG_STATUS      0xB0
+#define SILEAD_REG_ID          0xFC
+#define SILEAD_REG_MEM_CHECK   0xB0
+
+#define SILEAD_STATUS_OK       0x5A5A5A5A
+#define SILEAD_TS_DATA_LEN     44
+#define SILEAD_CLOCK           0x04
+
+#define SILEAD_CMD_RESET       0x88
+#define SILEAD_CMD_START       0x00
+
+#define SILEAD_POINT_DATA_LEN  0x04
+#define SILEAD_POINT_Y_OFF      0x00
+#define SILEAD_POINT_Y_MSB_OFF 0x01
+#define SILEAD_POINT_X_OFF     0x02
+#define SILEAD_POINT_X_MSB_OFF 0x03
+#define SILEAD_TOUCH_ID_MASK   0xF0
+
+#define SILEAD_CMD_SLEEP_MIN   10000
+#define SILEAD_CMD_SLEEP_MAX   20000
+#define SILEAD_POWER_SLEEP     20
+#define SILEAD_STARTUP_SLEEP   30
+
+#define SILEAD_MAX_FINGERS     10
+
+enum silead_ts_power {
+       SILEAD_POWER_ON  = 1,
+       SILEAD_POWER_OFF = 0
+};
+
+struct silead_ts_data {
+       struct i2c_client *client;
+       struct gpio_desc *gpio_power;
+       struct input_dev *input;
+       char fw_name[64];
+       struct touchscreen_properties prop;
+       u32 max_fingers;
+       u32 chip_id;
+       struct input_mt_pos pos[SILEAD_MAX_FINGERS];
+       int slots[SILEAD_MAX_FINGERS];
+       int id[SILEAD_MAX_FINGERS];
+};
+
+struct silead_fw_data {
+       u32 offset;
+       u32 val;
+};
+
+static int silead_ts_request_input_dev(struct silead_ts_data *data)
+{
+       struct device *dev = &data->client->dev;
+       int error;
+
+       data->input = devm_input_allocate_device(dev);
+       if (!data->input) {
+               dev_err(dev,
+                       "Failed to allocate input device\n");
+               return -ENOMEM;
+       }
+
+       input_set_abs_params(data->input, ABS_MT_POSITION_X, 0, 4095, 0, 0);
+       input_set_abs_params(data->input, ABS_MT_POSITION_Y, 0, 4095, 0, 0);
+       touchscreen_parse_properties(data->input, true, &data->prop);
+
+       input_mt_init_slots(data->input, data->max_fingers,
+                           INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED |
+                           INPUT_MT_TRACK);
+
+       data->input->name = SILEAD_TS_NAME;
+       data->input->phys = "input/ts";
+       data->input->id.bustype = BUS_I2C;
+
+       error = input_register_device(data->input);
+       if (error) {
+               dev_err(dev, "Failed to register input device: %d\n", error);
+               return error;
+       }
+
+       return 0;
+}
+
+static void silead_ts_set_power(struct i2c_client *client,
+                               enum silead_ts_power state)
+{
+       struct silead_ts_data *data = i2c_get_clientdata(client);
+
+       if (data->gpio_power) {
+               gpiod_set_value_cansleep(data->gpio_power, state);
+               msleep(SILEAD_POWER_SLEEP);
+       }
+}
+
+static void silead_ts_read_data(struct i2c_client *client)
+{
+       struct silead_ts_data *data = i2c_get_clientdata(client);
+       struct input_dev *input = data->input;
+       struct device *dev = &client->dev;
+       u8 *bufp, buf[SILEAD_TS_DATA_LEN];
+       int touch_nr, error, i;
+
+       error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_DATA,
+                                             SILEAD_TS_DATA_LEN, buf);
+       if (error < 0) {
+               dev_err(dev, "Data read error %d\n", error);
+               return;
+       }
+
+       touch_nr = buf[0];
+       if (touch_nr > data->max_fingers) {
+               dev_warn(dev, "More touches reported then supported %d > %d\n",
+                        touch_nr, data->max_fingers);
+               touch_nr = data->max_fingers;
+       }
+
+       bufp = buf + SILEAD_POINT_DATA_LEN;
+       for (i = 0; i < touch_nr; i++, bufp += SILEAD_POINT_DATA_LEN) {
+               /* Bits 4-7 are the touch id */
+               data->id[i] = (bufp[SILEAD_POINT_X_MSB_OFF] &
+                              SILEAD_TOUCH_ID_MASK) >> 4;
+               touchscreen_set_mt_pos(&data->pos[i], &data->prop,
+                       get_unaligned_le16(&bufp[SILEAD_POINT_X_OFF]) & 0xfff,
+                       get_unaligned_le16(&bufp[SILEAD_POINT_Y_OFF]) & 0xfff);
+       }
+
+       input_mt_assign_slots(input, data->slots, data->pos, touch_nr, 0);
+
+       for (i = 0; i < touch_nr; i++) {
+               input_mt_slot(input, data->slots[i]);
+               input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+               input_report_abs(input, ABS_MT_POSITION_X, data->pos[i].x);
+               input_report_abs(input, ABS_MT_POSITION_Y, data->pos[i].y);
+
+               dev_dbg(dev, "x=%d y=%d hw_id=%d sw_id=%d\n", data->pos[i].x,
+                       data->pos[i].y, data->id[i], data->slots[i]);
+       }
+
+       input_mt_sync_frame(input);
+       input_sync(input);
+}
+
+static int silead_ts_init(struct i2c_client *client)
+{
+       struct silead_ts_data *data = i2c_get_clientdata(client);
+       int error;
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
+                                         SILEAD_CMD_RESET);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR,
+                                       data->max_fingers);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
+                                         SILEAD_CLOCK);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
+                                         SILEAD_CMD_START);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       return 0;
+
+i2c_write_err:
+       dev_err(&client->dev, "Registers clear error %d\n", error);
+       return error;
+}
+
+static int silead_ts_reset(struct i2c_client *client)
+{
+       int error;
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
+                                         SILEAD_CMD_RESET);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
+                                         SILEAD_CLOCK);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_POWER,
+                                         SILEAD_CMD_START);
+       if (error)
+               goto i2c_write_err;
+       usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+       return 0;
+
+i2c_write_err:
+       dev_err(&client->dev, "Chip reset error %d\n", error);
+       return error;
+}
+
+static int silead_ts_startup(struct i2c_client *client)
+{
+       int error;
+
+       error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, 0x00);
+       if (error) {
+               dev_err(&client->dev, "Startup error %d\n", error);
+               return error;
+       }
+
+       msleep(SILEAD_STARTUP_SLEEP);
+
+       return 0;
+}
+
+static int silead_ts_load_fw(struct i2c_client *client)
+{
+       struct device *dev = &client->dev;
+       struct silead_ts_data *data = i2c_get_clientdata(client);
+       unsigned int fw_size, i;
+       const struct firmware *fw;
+       struct silead_fw_data *fw_data;
+       int error;
+
+       dev_dbg(dev, "Firmware file name: %s", data->fw_name);
+
+       error = request_firmware(&fw, data->fw_name, dev);
+       if (error) {
+               dev_err(dev, "Firmware request error %d\n", error);
+               return error;
+       }
+
+       fw_size = fw->size / sizeof(*fw_data);
+       fw_data = (struct silead_fw_data *)fw->data;
+
+       for (i = 0; i < fw_size; i++) {
+               error = i2c_smbus_write_i2c_block_data(client,
+                                                      fw_data[i].offset,
+                                                      4,
+                                                      (u8 *)&fw_data[i].val);
+               if (error) {
+                       dev_err(dev, "Firmware load error %d\n", error);
+                       break;
+               }
+       }
+
+       release_firmware(fw);
+       return error ?: 0;
+}
+
+static u32 silead_ts_get_status(struct i2c_client *client)
+{
+       int error;
+       __le32 status;
+
+       error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_STATUS,
+                                             sizeof(status), (u8 *)&status);
+       if (error < 0) {
+               dev_err(&client->dev, "Status read error %d\n", error);
+               return error;
+       }
+
+       return le32_to_cpu(status);
+}
+
+static int silead_ts_get_id(struct i2c_client *client)
+{
+       struct silead_ts_data *data = i2c_get_clientdata(client);
+       __le32 chip_id;
+       int error;
+
+       error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID,
+                                             sizeof(chip_id), (u8 *)&chip_id);
+       if (error < 0) {
+               dev_err(&client->dev, "Chip ID read error %d\n", error);
+               return error;
+       }
+
+       data->chip_id = le32_to_cpu(chip_id);
+       dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id);
+
+       return 0;
+}
+
+static int silead_ts_setup(struct i2c_client *client)
+{
+       int error;
+       u32 status;
+
+       silead_ts_set_power(client, SILEAD_POWER_OFF);
+       silead_ts_set_power(client, SILEAD_POWER_ON);
+
+       error = silead_ts_get_id(client);
+       if (error)
+               return error;
+
+       error = silead_ts_init(client);
+       if (error)
+               return error;
+
+       error = silead_ts_reset(client);
+       if (error)
+               return error;
+
+       error = silead_ts_load_fw(client);
+       if (error)
+               return error;
+
+       error = silead_ts_startup(client);
+       if (error)
+               return error;
+
+       status = silead_ts_get_status(client);
+       if (status != SILEAD_STATUS_OK) {
+               dev_err(&client->dev,
+                       "Initialization error, status: 0x%X\n", status);
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+static irqreturn_t silead_ts_threaded_irq_handler(int irq, void *id)
+{
+       struct silead_ts_data *data = id;
+       struct i2c_client *client = data->client;
+
+       silead_ts_read_data(client);
+
+       return IRQ_HANDLED;
+}
+
+static void silead_ts_read_props(struct i2c_client *client)
+{
+       struct silead_ts_data *data = i2c_get_clientdata(client);
+       struct device *dev = &client->dev;
+       const char *str;
+       int error;
+
+       error = device_property_read_u32(dev, "silead,max-fingers",
+                                        &data->max_fingers);
+       if (error) {
+               dev_dbg(dev, "Max fingers read error %d\n", error);
+               data->max_fingers = 5; /* Most devices handle up-to 5 fingers */
+       }
+
+       error = device_property_read_string(dev, "touchscreen-fw-name", &str);
+       if (!error)
+               snprintf(data->fw_name, sizeof(data->fw_name), "%s", str);
+       else
+               dev_dbg(dev, "Firmware file name read error. Using default.");
+}
+
+#ifdef CONFIG_ACPI
+static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
+                                        const struct i2c_device_id *id)
+{
+       const struct acpi_device_id *acpi_id;
+       struct device *dev = &data->client->dev;
+       int i;
+
+       if (ACPI_HANDLE(dev)) {
+               acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
+               if (!acpi_id)
+                       return -ENODEV;
+
+               snprintf(data->fw_name, sizeof(data->fw_name), "%s.fw",
+                       acpi_id->id);
+
+               for (i = 0; i < strlen(data->fw_name); i++)
+                       data->fw_name[i] = tolower(data->fw_name[i]);
+       } else {
+               snprintf(data->fw_name, sizeof(data->fw_name), "%s.fw",
+                       id->name);
+       }
+
+       return 0;
+}
+#else
+static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
+                                        const struct i2c_device_id *id)
+{
+       snprintf(data->fw_name, sizeof(data->fw_name), "%s.fw", id->name);
+       return 0;
+}
+#endif
+
+static int silead_ts_probe(struct i2c_client *client,
+                          const struct i2c_device_id *id)
+{
+       struct silead_ts_data *data;
+       struct device *dev = &client->dev;
+       int error;
+
+       if (!i2c_check_functionality(client->adapter,
+                                    I2C_FUNC_I2C |
+                                    I2C_FUNC_SMBUS_READ_I2C_BLOCK |
+                                    I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) {
+               dev_err(dev, "I2C functionality check failed\n");
+               return -ENXIO;
+       }
+
+       data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+       if (!data)
+               return -ENOMEM;
+
+       i2c_set_clientdata(client, data);
+       data->client = client;
+
+       error = silead_ts_set_default_fw_name(data, id);
+       if (error)
+               return error;
+
+       silead_ts_read_props(client);
+
+       /* We must have the IRQ provided by DT or ACPI subsytem */
+       if (client->irq <= 0)
+               return -ENODEV;
+
+       /* Power GPIO pin */
+       data->gpio_power = gpiod_get_optional(dev, "power", GPIOD_OUT_LOW);
+       if (IS_ERR(data->gpio_power)) {
+               if (PTR_ERR(data->gpio_power) != -EPROBE_DEFER)
+                       dev_err(dev, "Shutdown GPIO request failed\n");
+               return PTR_ERR(data->gpio_power);
+       }
+
+       error = silead_ts_setup(client);
+       if (error)
+               return error;
+
+       error = silead_ts_request_input_dev(data);
+       if (error)
+               return error;
+
+       error = devm_request_threaded_irq(dev, client->irq,
+                                         NULL, silead_ts_threaded_irq_handler,
+                                         IRQF_ONESHOT, client->name, data);
+       if (error) {
+               if (error != -EPROBE_DEFER)
+                       dev_err(dev, "IRQ request failed %d\n", error);
+               return error;
+       }
+
+       return 0;
+}
+
+static int __maybe_unused silead_ts_suspend(struct device *dev)
+{
+       struct i2c_client *client = to_i2c_client(dev);
+
+       silead_ts_set_power(client, SILEAD_POWER_OFF);
+       return 0;
+}
+
+static int __maybe_unused silead_ts_resume(struct device *dev)
+{
+       struct i2c_client *client = to_i2c_client(dev);
+       int error, status;
+
+       silead_ts_set_power(client, SILEAD_POWER_ON);
+
+       error = silead_ts_reset(client);
+       if (error)
+               return error;
+
+       error = silead_ts_startup(client);
+       if (error)
+               return error;
+
+       status = silead_ts_get_status(client);
+       if (status != SILEAD_STATUS_OK) {
+               dev_err(dev, "Resume error, status: 0x%02x\n", status);
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(silead_ts_pm, silead_ts_suspend, silead_ts_resume);
+
+static const struct i2c_device_id silead_ts_id[] = {
+       { "gsl1680", 0 },
+       { "gsl1688", 0 },
+       { "gsl3670", 0 },
+       { "gsl3675", 0 },
+       { "gsl3692", 0 },
+       { "mssl1680", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, silead_ts_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id silead_ts_acpi_match[] = {
+       { "GSL1680", 0 },
+       { "GSL1688", 0 },
+       { "GSL3670", 0 },
+       { "GSL3675", 0 },
+       { "GSL3692", 0 },
+       { "MSSL1680", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(acpi, silead_ts_acpi_match);
+#endif
+
+static struct i2c_driver silead_ts_driver = {
+       .probe = silead_ts_probe,
+       .id_table = silead_ts_id,
+       .driver = {
+               .name = SILEAD_TS_NAME,
+               .acpi_match_table = ACPI_PTR(silead_ts_acpi_match),
+               .pm = &silead_ts_pm,
+       },
+};
+module_i2c_driver(silead_ts_driver);
+
+MODULE_AUTHOR("Robert Dolca <robert.dolca@intel.com>");
+MODULE_DESCRIPTION("Silead I2C touchscreen driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/sis_i2c.c b/drivers/input/touchscreen/sis_i2c.c
new file mode 100644 (file)
index 0000000..8d93f8c
--- /dev/null
@@ -0,0 +1,413 @@
+/*
+ * Touch Screen driver for SiS 9200 family I2C Touch panels
+ *
+ * Copyright (C) 2015 SiS, Inc.
+ * Copyright (C) 2016 Nextfour Group
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/crc-itu-t.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#define SIS_I2C_NAME           "sis_i2c_ts"
+
+/*
+ * The I2C packet format:
+ * le16                byte count
+ * u8          Report ID
+ * <contact data - variable length>
+ * u8          Number of contacts
+ * le16                Scan Time (optional)
+ * le16                CRC
+ *
+ * One touch point information consists of 6+ bytes, the order is:
+ * u8          contact state
+ * u8          finger id
+ * le16                x axis
+ * le16                y axis
+ * u8          contact width (optional)
+ * u8          contact height (optional)
+ * u8          pressure (optional)
+ *
+ * Maximum amount of data transmitted in one shot is 64 bytes, if controller
+ * needs to report more contacts than fit in one packet it will send true
+ * number of contacts in first packet and 0 as number of contacts in second
+ * packet.
+ */
+
+#define SIS_MAX_PACKET_SIZE            64
+
+#define SIS_PKT_LEN_OFFSET             0
+#define SIS_PKT_REPORT_OFFSET          2 /* Report ID/type */
+#define SIS_PKT_CONTACT_OFFSET         3 /* First contact */
+
+#define SIS_SCAN_TIME_LEN              2
+
+/* Supported report types */
+#define SIS_ALL_IN_ONE_PACKAGE         0x10
+#define SIS_PKT_IS_TOUCH(x)            (((x) & 0x0f) == 0x01)
+#define SIS_PKT_IS_HIDI2C(x)           (((x) & 0x0f) == 0x06)
+
+/* Contact properties within report */
+#define SIS_PKT_HAS_AREA(x)            ((x) & BIT(4))
+#define SIS_PKT_HAS_PRESSURE(x)                ((x) & BIT(5))
+#define SIS_PKT_HAS_SCANTIME(x)                ((x) & BIT(6))
+
+/* Contact size */
+#define SIS_BASE_LEN_PER_CONTACT       6
+#define SIS_AREA_LEN_PER_CONTACT       2
+#define SIS_PRESSURE_LEN_PER_CONTACT   1
+
+/* Offsets within contact data */
+#define SIS_CONTACT_STATUS_OFFSET      0
+#define SIS_CONTACT_ID_OFFSET          1 /* Contact ID */
+#define SIS_CONTACT_X_OFFSET           2
+#define SIS_CONTACT_Y_OFFSET           4
+#define SIS_CONTACT_WIDTH_OFFSET       6
+#define SIS_CONTACT_HEIGHT_OFFSET      7
+#define SIS_CONTACT_PRESSURE_OFFSET(id)        (SIS_PKT_HAS_AREA(id) ? 8 : 6)
+
+/* Individual contact state */
+#define SIS_STATUS_UP                  0x0
+#define SIS_STATUS_DOWN                        0x3
+
+/* Touchscreen parameters */
+#define SIS_MAX_FINGERS                        10
+#define SIS_MAX_X                      4095
+#define SIS_MAX_Y                      4095
+#define SIS_MAX_PRESSURE               255
+
+/* Resolution diagonal */
+#define SIS_AREA_LENGTH_LONGER         5792
+/*((SIS_MAX_X^2) + (SIS_MAX_Y^2))^0.5*/
+#define SIS_AREA_LENGTH_SHORT          5792
+#define SIS_AREA_UNIT                  (5792 / 32)
+
+struct sis_ts_data {
+       struct i2c_client *client;
+       struct input_dev *input;
+
+       struct gpio_desc *attn_gpio;
+       struct gpio_desc *reset_gpio;
+
+       u8 packet[SIS_MAX_PACKET_SIZE];
+};
+
+static int sis_read_packet(struct i2c_client *client, u8 *buf,
+                          unsigned int *num_contacts,
+                          unsigned int *contact_size)
+{
+       int count_idx;
+       int ret;
+       u16 len;
+       u16 crc, pkg_crc;
+       u8 report_id;
+
+       ret = i2c_master_recv(client, buf, SIS_MAX_PACKET_SIZE);
+       if (ret <= 0)
+               return -EIO;
+
+       len = get_unaligned_le16(&buf[SIS_PKT_LEN_OFFSET]);
+       if (len > SIS_MAX_PACKET_SIZE) {
+               dev_err(&client->dev,
+                       "%s: invalid packet length (%d vs %d)\n",
+                       __func__, len, SIS_MAX_PACKET_SIZE);
+               return -E2BIG;
+       }
+
+       if (len < 10)
+               return -EINVAL;
+
+       report_id = buf[SIS_PKT_REPORT_OFFSET];
+       count_idx  = len - 1;
+       *contact_size = SIS_BASE_LEN_PER_CONTACT;
+
+       if (report_id != SIS_ALL_IN_ONE_PACKAGE) {
+               if (SIS_PKT_IS_TOUCH(report_id)) {
+                       /*
+                        * Calculate CRC ignoring packet length
+                        * in the beginning and CRC transmitted
+                        * at the end of the packet.
+                        */
+                       crc = crc_itu_t(0, buf + 2, len - 2 - 2);
+                       pkg_crc = get_unaligned_le16(&buf[len - 2]);
+
+                       if (crc != pkg_crc) {
+                               dev_err(&client->dev,
+                                       "%s: CRC Error (%d vs %d)\n",
+                                       __func__, crc, pkg_crc);
+                               return -EINVAL;
+                       }
+
+                       count_idx -= 2;
+
+               } else if (!SIS_PKT_IS_HIDI2C(report_id)) {
+                       dev_err(&client->dev,
+                               "%s: invalid packet ID %#02x\n",
+                               __func__, report_id);
+                       return -EINVAL;
+               }
+
+               if (SIS_PKT_HAS_SCANTIME(report_id))
+                       count_idx -= SIS_SCAN_TIME_LEN;
+
+               if (SIS_PKT_HAS_AREA(report_id))
+                       *contact_size += SIS_AREA_LEN_PER_CONTACT;
+               if (SIS_PKT_HAS_PRESSURE(report_id))
+                       *contact_size += SIS_PRESSURE_LEN_PER_CONTACT;
+       }
+
+       *num_contacts = buf[count_idx];
+       return 0;
+}
+
+static int sis_ts_report_contact(struct sis_ts_data *ts, const u8 *data, u8 id)
+{
+       struct input_dev *input = ts->input;
+       int slot;
+       u8 status = data[SIS_CONTACT_STATUS_OFFSET];
+       u8 pressure;
+       u8 height, width;
+       u16 x, y;
+
+       if (status != SIS_STATUS_DOWN && status != SIS_STATUS_UP) {
+               dev_err(&ts->client->dev, "Unexpected touch status: %#02x\n",
+                       data[SIS_CONTACT_STATUS_OFFSET]);
+               return -EINVAL;
+       }
+
+       slot = input_mt_get_slot_by_key(input, data[SIS_CONTACT_ID_OFFSET]);
+       if (slot < 0)
+               return -ENOENT;
+
+       input_mt_slot(input, slot);
+       input_mt_report_slot_state(input, MT_TOOL_FINGER,
+                                  status == SIS_STATUS_DOWN);
+
+       if (status == SIS_STATUS_DOWN) {
+               pressure = height = width = 1;
+               if (id != SIS_ALL_IN_ONE_PACKAGE) {
+                       if (SIS_PKT_HAS_AREA(id)) {
+                               width = data[SIS_CONTACT_WIDTH_OFFSET];
+                               height = data[SIS_CONTACT_HEIGHT_OFFSET];
+                       }
+
+                       if (SIS_PKT_HAS_PRESSURE(id))
+                               pressure =
+                                       data[SIS_CONTACT_PRESSURE_OFFSET(id)];
+               }
+
+               x = get_unaligned_le16(&data[SIS_CONTACT_X_OFFSET]);
+               y = get_unaligned_le16(&data[SIS_CONTACT_Y_OFFSET]);
+
+               input_report_abs(input, ABS_MT_TOUCH_MAJOR,
+                                width * SIS_AREA_UNIT);
+               input_report_abs(input, ABS_MT_TOUCH_MINOR,
+                                height * SIS_AREA_UNIT);
+               input_report_abs(input, ABS_MT_PRESSURE, pressure);
+               input_report_abs(input, ABS_MT_POSITION_X, x);
+               input_report_abs(input, ABS_MT_POSITION_Y, y);
+       }
+
+       return 0;
+}
+
+static void sis_ts_handle_packet(struct sis_ts_data *ts)
+{
+       const u8 *contact;
+       unsigned int num_to_report = 0;
+       unsigned int num_contacts;
+       unsigned int num_reported;
+       unsigned int contact_size;
+       int error;
+       u8 report_id;
+
+       do {
+               error = sis_read_packet(ts->client, ts->packet,
+                                       &num_contacts, &contact_size);
+               if (error)
+                       break;
+
+               if (num_to_report == 0) {
+                       num_to_report = num_contacts;
+               } else if (num_contacts != 0) {
+                       dev_err(&ts->client->dev,
+                               "%s: nonzero (%d) point count in tail packet\n",
+                               __func__, num_contacts);
+                       break;
+               }
+
+               report_id = ts->packet[SIS_PKT_REPORT_OFFSET];
+               contact = &ts->packet[SIS_PKT_CONTACT_OFFSET];
+               num_reported = 0;
+
+               while (num_to_report > 0) {
+                       error = sis_ts_report_contact(ts, contact, report_id);
+                       if (error)
+                               break;
+
+                       contact += contact_size;
+                       num_to_report--;
+                       num_reported++;
+
+                       if (report_id != SIS_ALL_IN_ONE_PACKAGE &&
+                           num_reported >= 5) {
+                               /*
+                                * The remainder of contacts is sent
+                                * in the 2nd packet.
+                                */
+                               break;
+                       }
+               }
+       } while (num_to_report > 0);
+
+       input_mt_sync_frame(ts->input);
+       input_sync(ts->input);
+}
+
+static irqreturn_t sis_ts_irq_handler(int irq, void *dev_id)
+{
+       struct sis_ts_data *ts = dev_id;
+
+       do {
+               sis_ts_handle_packet(ts);
+       } while (ts->attn_gpio && gpiod_get_value_cansleep(ts->attn_gpio));
+
+       return IRQ_HANDLED;
+}
+
+static void sis_ts_reset(struct sis_ts_data *ts)
+{
+       if (ts->reset_gpio) {
+               /* Get out of reset */
+               usleep_range(1000, 2000);
+               gpiod_set_value(ts->reset_gpio, 1);
+               usleep_range(1000, 2000);
+               gpiod_set_value(ts->reset_gpio, 0);
+               msleep(100);
+       }
+}
+
+static int sis_ts_probe(struct i2c_client *client,
+                       const struct i2c_device_id *id)
+{
+       struct sis_ts_data *ts;
+       struct input_dev *input;
+       int error;
+
+       ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
+       if (!ts)
+               return -ENOMEM;
+
+       ts->client = client;
+       i2c_set_clientdata(client, ts);
+
+       ts->attn_gpio = devm_gpiod_get_optional(&client->dev,
+                                               "attn", GPIOD_IN);
+       if (IS_ERR(ts->attn_gpio)) {
+               error = PTR_ERR(ts->attn_gpio);
+               if (error != -EPROBE_DEFER)
+                       dev_err(&client->dev,
+                               "Failed to get attention GPIO: %d\n", error);
+               return error;
+       }
+
+       ts->reset_gpio = devm_gpiod_get_optional(&client->dev,
+                                                "reset", GPIOD_OUT_LOW);
+       if (IS_ERR(ts->reset_gpio)) {
+               error = PTR_ERR(ts->reset_gpio);
+               if (error != -EPROBE_DEFER)
+                       dev_err(&client->dev,
+                               "Failed to get reset GPIO: %d\n", error);
+               return error;
+       }
+
+       sis_ts_reset(ts);
+
+       ts->input = input = devm_input_allocate_device(&client->dev);
+       if (!input) {
+               dev_err(&client->dev, "Failed to allocate input device\n");
+               return -ENOMEM;
+       }
+
+       input->name = "SiS Touchscreen";
+       input->id.bustype = BUS_I2C;
+
+       input_set_abs_params(input, ABS_MT_POSITION_X, 0, SIS_MAX_X, 0, 0);
+       input_set_abs_params(input, ABS_MT_POSITION_Y, 0, SIS_MAX_Y, 0, 0);
+       input_set_abs_params(input, ABS_MT_PRESSURE, 0, SIS_MAX_PRESSURE, 0, 0);
+       input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
+                            0, SIS_AREA_LENGTH_LONGER, 0, 0);
+       input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
+                            0, SIS_AREA_LENGTH_SHORT, 0, 0);
+
+       error = input_mt_init_slots(input, SIS_MAX_FINGERS, INPUT_MT_DIRECT);
+       if (error) {
+               dev_err(&client->dev,
+                       "Failed to initialize MT slots: %d\n", error);
+               return error;
+       }
+
+       error = devm_request_threaded_irq(&client->dev, client->irq,
+                                         NULL, sis_ts_irq_handler,
+                                         IRQF_ONESHOT,
+                                         client->name, ts);
+       if (error) {
+               dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
+               return error;
+       }
+
+       error = input_register_device(ts->input);
+       if (error) {
+               dev_err(&client->dev,
+                       "Failed to register input device: %d\n", error);
+               return error;
+       }
+
+       return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id sis_ts_dt_ids[] = {
+       { .compatible = "sis,9200-ts" },
+       { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sis_ts_dt_ids);
+#endif
+
+static const struct i2c_device_id sis_ts_id[] = {
+       { SIS_I2C_NAME, 0 },
+       { "9200-ts",    0 },
+       { /* sentinel */  }
+};
+MODULE_DEVICE_TABLE(i2c, sis_ts_id);
+
+static struct i2c_driver sis_ts_driver = {
+       .driver = {
+               .name   = SIS_I2C_NAME,
+               .of_match_table = of_match_ptr(sis_ts_dt_ids),
+       },
+       .probe          = sis_ts_probe,
+       .id_table       = sis_ts_id,
+};
+module_i2c_driver(sis_ts_driver);
+
+MODULE_DESCRIPTION("SiS 9200 Family Touchscreen Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Mika Penttilä <mika.penttila@nextfour.com>");
index 0f9bafa17a02dde9af7f4866ca8b9f741c83ddf1..d98780ca9604a7cae22d6c103c1b54eea2e22d0d 100644 (file)
@@ -62,7 +62,6 @@ struct serio;
 void i8042_lock_chip(void);
 void i8042_unlock_chip(void);
 int i8042_command(unsigned char *param, int command);
-bool i8042_check_port_owner(const struct serio *);
 int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
                                        struct serio *serio));
 int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
@@ -83,11 +82,6 @@ static inline int i8042_command(unsigned char *param, int command)
        return -ENODEV;
 }
 
-static inline bool i8042_check_port_owner(const struct serio *serio)
-{
-       return false;
-}
-
 static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
                                        struct serio *serio))
 {
index df4ab5de15862c7ba35fb532174db56866ffff47..c733cff44e18a74f3949032d1413356df0a9e226 100644 (file)
@@ -31,7 +31,8 @@ struct serio {
 
        struct serio_device_id id;
 
-       spinlock_t lock;                /* protects critical sections from port's interrupt handler */
+       /* Protects critical sections from port's interrupt handler */
+       spinlock_t lock;
 
        int (*write)(struct serio *, unsigned char);
        int (*open)(struct serio *);
@@ -40,16 +41,29 @@ struct serio {
        void (*stop)(struct serio *);
 
        struct serio *parent;
-       struct list_head child_node;    /* Entry in parent->children list */
+       /* Entry in parent->children list */
+       struct list_head child_node;
        struct list_head children;
-       unsigned int depth;             /* level of nesting in serio hierarchy */
+       /* Level of nesting in serio hierarchy */
+       unsigned int depth;
 
-       struct serio_driver *drv;       /* accessed from interrupt, must be protected by serio->lock and serio->sem */
-       struct mutex drv_mutex;         /* protects serio->drv so attributes can pin driver */
+       /*
+        * serio->drv is accessed from interrupt handlers; when modifying
+        * caller should acquire serio->drv_mutex and serio->lock.
+        */
+       struct serio_driver *drv;
+       /* Protects serio->drv so attributes can pin current driver */
+       struct mutex drv_mutex;
 
        struct device dev;
 
        struct list_head node;
+
+       /*
+        * For use by PS/2 layer when several ports share hardware and
+        * may get indigestion when exposed to concurrent access (i8042).
+        */
+       struct mutex *ps2_cmd_mutex;
 };
 #define to_serio_port(d)       container_of(d, struct serio, dev)