Merge branch 'next' into for-linus

Prepare input updates for 6.8 merge window.

6 files changed, 358 insertions, 40 deletions

diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index ac6925ce8366..7755e5b454d2 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -412,4 +412,14 @@ config JOYSTICK_SENSEHAT
 	  To compile this driver as a module, choose M here: the
 	  module will be called sensehat_joystick.
 
+config JOYSTICK_SEESAW
+	tristate "Adafruit Mini I2C Gamepad with Seesaw"
+	depends on I2C
+	select INPUT_SPARSEKMAP
+	help
+	  Say Y here if you want to use the Adafruit Mini I2C Gamepad.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called adafruit-seesaw.
+
 endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index 3937535f0098..9976f596a920 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_JOYSTICK_N64)		+= n64joy.o
 obj-$(CONFIG_JOYSTICK_PSXPAD_SPI)	+= psxpad-spi.o
 obj-$(CONFIG_JOYSTICK_PXRC)		+= pxrc.o
 obj-$(CONFIG_JOYSTICK_QWIIC)		+= qwiic-joystick.o
+obj-$(CONFIG_JOYSTICK_SEESAW)		+= adafruit-seesaw.o
 obj-$(CONFIG_JOYSTICK_SENSEHAT)	+= sensehat-joystick.o
 obj-$(CONFIG_JOYSTICK_SIDEWINDER)	+= sidewinder.o
 obj-$(CONFIG_JOYSTICK_SPACEBALL)	+= spaceball.o
diff --git a/drivers/input/joystick/adafruit-seesaw.c b/drivers/input/joystick/adafruit-seesaw.c
new file mode 100644
index 000000000000..1b9279f024cc
--- /dev/null
+++ b/drivers/input/joystick/adafruit-seesaw.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 Anshul Dalal <anshulusr@gmail.com>
+ *
+ * Driver for Adafruit Mini I2C Gamepad
+ *
+ * Based on the work of:
+ *	Oleh Kravchenko (Sparkfun Qwiic Joystick driver)
+ *
+ * Datasheet: https://cdn-learn.adafruit.com/downloads/pdf/gamepad-qt.pdf
+ * Product page: https://www.adafruit.com/product/5743
+ * Firmware and hardware sources: https://github.com/adafruit/Adafruit_Seesaw
+ *
+ * TODO:
+ *	- Add interrupt support
+ */
+
+#include <asm/unaligned.h>
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#define SEESAW_DEVICE_NAME		"seesaw-gamepad"
+
+#define SEESAW_ADC_BASE			0x0900
+
+#define SEESAW_GPIO_DIRCLR_BULK		0x0103
+#define SEESAW_GPIO_BULK		0x0104
+#define SEESAW_GPIO_BULK_SET		0x0105
+#define SEESAW_GPIO_PULLENSET		0x010b
+
+#define SEESAW_STATUS_HW_ID		0x0001
+#define SEESAW_STATUS_SWRST		0x007f
+
+#define SEESAW_ADC_OFFSET		0x07
+
+#define SEESAW_BUTTON_A			0x05
+#define SEESAW_BUTTON_B			0x01
+#define SEESAW_BUTTON_X			0x06
+#define SEESAW_BUTTON_Y			0x02
+#define SEESAW_BUTTON_START		0x10
+#define SEESAW_BUTTON_SELECT		0x00
+
+#define SEESAW_ANALOG_X			0x0e
+#define SEESAW_ANALOG_Y			0x0f
+
+#define SEESAW_JOYSTICK_MAX_AXIS	1023
+#define SEESAW_JOYSTICK_FUZZ		2
+#define SEESAW_JOYSTICK_FLAT		4
+
+#define SEESAW_GAMEPAD_POLL_INTERVAL_MS	16
+#define SEESAW_GAMEPAD_POLL_MIN		8
+#define SEESAW_GAMEPAD_POLL_MAX		32
+
+static const unsigned long SEESAW_BUTTON_MASK =
+	BIT(SEESAW_BUTTON_A) | BIT(SEESAW_BUTTON_B) | BIT(SEESAW_BUTTON_X) |
+	BIT(SEESAW_BUTTON_Y) | BIT(SEESAW_BUTTON_START) |
+	BIT(SEESAW_BUTTON_SELECT);
+
+struct seesaw_gamepad {
+	struct input_dev *input_dev;
+	struct i2c_client *i2c_client;
+};
+
+struct seesaw_data {
+	u16 x;
+	u16 y;
+	u32 button_state;
+};
+
+static const struct key_entry seesaw_buttons_new[] = {
+	{ KE_KEY, SEESAW_BUTTON_A, .keycode = BTN_SOUTH },
+	{ KE_KEY, SEESAW_BUTTON_B, .keycode = BTN_EAST },
+	{ KE_KEY, SEESAW_BUTTON_X, .keycode = BTN_NORTH },
+	{ KE_KEY, SEESAW_BUTTON_Y, .keycode = BTN_WEST },
+	{ KE_KEY, SEESAW_BUTTON_START, .keycode = BTN_START },
+	{ KE_KEY, SEESAW_BUTTON_SELECT, .keycode = BTN_SELECT },
+	{ KE_END, 0 }
+};
+
+static int seesaw_register_read(struct i2c_client *client, u16 reg, void *buf,
+				int count)
+{
+	__be16 register_buf = cpu_to_be16(reg);
+	struct i2c_msg message_buf[2] = {
+		{
+			.addr = client->addr,
+			.flags = client->flags,
+			.len = sizeof(register_buf),
+			.buf = (u8 *)&register_buf,
+		},
+		{
+			.addr = client->addr,
+			.flags = client->flags | I2C_M_RD,
+			.len = count,
+			.buf = (u8 *)buf,
+		},
+	};
+	int ret;
+
+	ret = i2c_transfer(client->adapter, message_buf,
+			   ARRAY_SIZE(message_buf));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int seesaw_register_write_u8(struct i2c_client *client, u16 reg,
+				    u8 value)
+{
+	u8 write_buf[sizeof(reg) + sizeof(value)];
+	int ret;
+
+	put_unaligned_be16(reg, write_buf);
+	write_buf[sizeof(reg)] = value;
+
+	ret = i2c_master_send(client, write_buf, sizeof(write_buf));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int seesaw_register_write_u32(struct i2c_client *client, u16 reg,
+				     u32 value)
+{
+	u8 write_buf[sizeof(reg) + sizeof(value)];
+	int ret;
+
+	put_unaligned_be16(reg, write_buf);
+	put_unaligned_be32(value, write_buf + sizeof(reg));
+	ret = i2c_master_send(client, write_buf, sizeof(write_buf));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int seesaw_read_data(struct i2c_client *client, struct seesaw_data *data)
+{
+	__be16 adc_data;
+	__be32 read_buf;
+	int err;
+
+	err = seesaw_register_read(client, SEESAW_GPIO_BULK,
+				   &read_buf, sizeof(read_buf));
+	if (err)
+		return err;
+
+	data->button_state = ~be32_to_cpu(read_buf);
+
+	err = seesaw_register_read(client,
+				   SEESAW_ADC_BASE |
+					(SEESAW_ADC_OFFSET + SEESAW_ANALOG_X),
+				   &adc_data, sizeof(adc_data));
+	if (err)
+		return err;
+	/*
+	 * ADC reads left as max and right as 0, must be reversed since kernel
+	 * expects reports in opposite order.
+	 */
+	data->x = SEESAW_JOYSTICK_MAX_AXIS - be16_to_cpu(adc_data);
+
+	err = seesaw_register_read(client,
+				   SEESAW_ADC_BASE |
+					(SEESAW_ADC_OFFSET + SEESAW_ANALOG_Y),
+				   &adc_data, sizeof(adc_data));
+	if (err)
+		return err;
+
+	data->y = be16_to_cpu(adc_data);
+
+	return 0;
+}
+
+static void seesaw_poll(struct input_dev *input)
+{
+	struct seesaw_gamepad *private = input_get_drvdata(input);
+	struct seesaw_data data;
+	int err, i;
+
+	err = seesaw_read_data(private->i2c_client, &data);
+	if (err) {
+		dev_err_ratelimited(&input->dev,
+				    "failed to read joystick state: %d\n", err);
+		return;
+	}
+
+	input_report_abs(input, ABS_X, data.x);
+	input_report_abs(input, ABS_Y, data.y);
+
+	for_each_set_bit(i, &SEESAW_BUTTON_MASK,
+			 BITS_PER_TYPE(SEESAW_BUTTON_MASK)) {
+		if (!sparse_keymap_report_event(input, i,
+						data.button_state & BIT(i),
+						false))
+			dev_err_ratelimited(&input->dev,
+					    "failed to report keymap event");
+	}
+
+	input_sync(input);
+}
+
+static int seesaw_probe(struct i2c_client *client)
+{
+	struct seesaw_gamepad *seesaw;
+	u8 hardware_id;
+	int err;
+
+	err = seesaw_register_write_u8(client, SEESAW_STATUS_SWRST, 0xFF);
+	if (err)
+		return err;
+
+	/* Wait for the registers to reset before proceeding */
+	usleep_range(10000, 15000);
+
+	seesaw = devm_kzalloc(&client->dev, sizeof(*seesaw), GFP_KERNEL);
+	if (!seesaw)
+		return -ENOMEM;
+
+	err = seesaw_register_read(client, SEESAW_STATUS_HW_ID,
+				   &hardware_id, sizeof(hardware_id));
+	if (err)
+		return err;
+
+	dev_dbg(&client->dev, "Adafruit Seesaw Gamepad, Hardware ID: %02x\n",
+		hardware_id);
+
+	/* Set Pin Mode to input and enable pull-up resistors */
+	err = seesaw_register_write_u32(client, SEESAW_GPIO_DIRCLR_BULK,
+					SEESAW_BUTTON_MASK);
+	if (err)
+		return err;
+	err = seesaw_register_write_u32(client, SEESAW_GPIO_PULLENSET,
+					SEESAW_BUTTON_MASK);
+	if (err)
+		return err;
+	err = seesaw_register_write_u32(client, SEESAW_GPIO_BULK_SET,
+					SEESAW_BUTTON_MASK);
+	if (err)
+		return err;
+
+	seesaw->i2c_client = client;
+	seesaw->input_dev = devm_input_allocate_device(&client->dev);
+	if (!seesaw->input_dev)
+		return -ENOMEM;
+
+	seesaw->input_dev->id.bustype = BUS_I2C;
+	seesaw->input_dev->name = "Adafruit Seesaw Gamepad";
+	seesaw->input_dev->phys = "i2c/" SEESAW_DEVICE_NAME;
+	input_set_drvdata(seesaw->input_dev, seesaw);
+	input_set_abs_params(seesaw->input_dev, ABS_X,
+			     0, SEESAW_JOYSTICK_MAX_AXIS,
+			     SEESAW_JOYSTICK_FUZZ, SEESAW_JOYSTICK_FLAT);
+	input_set_abs_params(seesaw->input_dev, ABS_Y,
+			     0, SEESAW_JOYSTICK_MAX_AXIS,
+			     SEESAW_JOYSTICK_FUZZ, SEESAW_JOYSTICK_FLAT);
+
+	err = sparse_keymap_setup(seesaw->input_dev, seesaw_buttons_new, NULL);
+	if (err) {
+		dev_err(&client->dev,
+			"failed to set up input device keymap: %d\n", err);
+		return err;
+	}
+
+	err = input_setup_polling(seesaw->input_dev, seesaw_poll);
+	if (err) {
+		dev_err(&client->dev, "failed to set up polling: %d\n", err);
+		return err;
+	}
+
+	input_set_poll_interval(seesaw->input_dev,
+				SEESAW_GAMEPAD_POLL_INTERVAL_MS);
+	input_set_max_poll_interval(seesaw->input_dev, SEESAW_GAMEPAD_POLL_MAX);
+	input_set_min_poll_interval(seesaw->input_dev, SEESAW_GAMEPAD_POLL_MIN);
+
+	err = input_register_device(seesaw->input_dev);
+	if (err) {
+		dev_err(&client->dev, "failed to register joystick: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static const struct i2c_device_id seesaw_id_table[] = {
+	{ SEESAW_DEVICE_NAME },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, seesaw_id_table);
+
+static const struct of_device_id seesaw_of_table[] = {
+	{ .compatible = "adafruit,seesaw-gamepad"},
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, seesaw_of_table);
+
+static struct i2c_driver seesaw_driver = {
+	.driver = {
+		.name = SEESAW_DEVICE_NAME,
+		.of_match_table = seesaw_of_table,
+	},
+	.id_table = seesaw_id_table,
+	.probe = seesaw_probe,
+};
+module_i2c_driver(seesaw_driver);
+
+MODULE_AUTHOR("Anshul Dalal <anshulusr@gmail.com>");
+MODULE_DESCRIPTION("Adafruit Mini I2C Gamepad driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/joystick/as5011.c b/drivers/input/joystick/as5011.c
index bf8b1cc0ea9c..f1822c19a289 100644
--- a/drivers/input/joystick/as5011.c
+++ b/drivers/input/joystick/as5011.c
@@ -13,7 +13,7 @@
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/input.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <linux/input/as5011.h>
 #include <linux/slab.h>
@@ -61,7 +61,7 @@ MODULE_LICENSE("GPL");
 struct as5011_device {
 	struct input_dev *input_dev;
 	struct i2c_client *i2c_client;
-	unsigned int button_gpio;
+	struct gpio_desc *button_gpiod;
 	unsigned int button_irq;
 	unsigned int axis_irq;
 };
@@ -114,7 +114,7 @@ static int as5011_i2c_read(struct i2c_client *client,
 static irqreturn_t as5011_button_interrupt(int irq, void *dev_id)
 {
 	struct as5011_device *as5011 = dev_id;
-	int val = gpio_get_value_cansleep(as5011->button_gpio);
+	int val = gpiod_get_value_cansleep(as5011->button_gpiod);
 
 	input_report_key(as5011->input_dev, BTN_JOYSTICK, !val);
 	input_sync(as5011->input_dev);
@@ -248,7 +248,6 @@ static int as5011_probe(struct i2c_client *client)
 
 	as5011->i2c_client = client;
 	as5011->input_dev = input_dev;
-	as5011->button_gpio = plat_data->button_gpio;
 	as5011->axis_irq = plat_data->axis_irq;
 
 	input_dev->name = "Austria Microsystem as5011 joystick";
@@ -262,18 +261,20 @@ static int as5011_probe(struct i2c_client *client)
 	input_set_abs_params(as5011->input_dev, ABS_Y,
 		AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
 
-	error = gpio_request(as5011->button_gpio, "AS5011 button");
-	if (error < 0) {
-		dev_err(&client->dev, "Failed to request button gpio\n");
+	as5011->button_gpiod = devm_gpiod_get(&client->dev, NULL, GPIOD_IN);
+	if (IS_ERR(as5011->button_gpiod)) {
+		error = PTR_ERR(as5011->button_gpiod);
+		dev_err(&client->dev, "Failed to request button GPIO\n");
 		goto err_free_mem;
 	}
+	gpiod_set_consumer_name(as5011->button_gpiod, "AS5011 button");
 
-	irq = gpio_to_irq(as5011->button_gpio);
+	irq = gpiod_to_irq(as5011->button_gpiod);
 	if (irq < 0) {
 		dev_err(&client->dev,
 			"Failed to get irq number for button gpio\n");
 		error = irq;
-		goto err_free_button_gpio;
+		goto err_free_mem;
 	}
 
 	as5011->button_irq = irq;
@@ -286,7 +287,7 @@ static int as5011_probe(struct i2c_client *client)
 	if (error < 0) {
 		dev_err(&client->dev,
 			"Can't allocate button irq %d\n", as5011->button_irq);
-		goto err_free_button_gpio;
+		goto err_free_mem;
 	}
 
 	error = as5011_configure_chip(as5011, plat_data);
@@ -317,8 +318,6 @@ err_free_axis_irq:
 	free_irq(as5011->axis_irq, as5011);
 err_free_button_irq:
 	free_irq(as5011->button_irq, as5011);
-err_free_button_gpio:
-	gpio_free(as5011->button_gpio);
 err_free_mem:
 	input_free_device(input_dev);
 	kfree(as5011);
@@ -332,7 +331,6 @@ static void as5011_remove(struct i2c_client *client)
 
 	free_irq(as5011->axis_irq, as5011);
 	free_irq(as5011->button_irq, as5011);
-	gpio_free(as5011->button_gpio);
 
 	input_unregister_device(as5011->input_dev);
 	kfree(as5011);
diff --git a/drivers/input/joystick/pxrc.c b/drivers/input/joystick/pxrc.c
index ea2bf5951d67..52d9eab667b7 100644
--- a/drivers/input/joystick/pxrc.c
+++ b/drivers/input/joystick/pxrc.c
@@ -5,15 +5,17 @@
  * Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
  */
 
-#include <linux/kernel.h>
+#include <linux/cleanup.h>
 #include <linux/errno.h>
-#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
 #include <linux/uaccess.h>
+
 #include <linux/usb.h>
 #include <linux/usb/input.h>
-#include <linux/mutex.h>
-#include <linux/input.h>
 
 #define PXRC_VENDOR_ID		0x1781
 #define PXRC_PRODUCT_ID		0x0898
@@ -81,33 +83,28 @@ exit:
 static int pxrc_open(struct input_dev *input)
 {
 	struct pxrc *pxrc = input_get_drvdata(input);
-	int retval;
+	int error;
 
-	mutex_lock(&pxrc->pm_mutex);
-	retval = usb_submit_urb(pxrc->urb, GFP_KERNEL);
-	if (retval) {
+	guard(mutex)(&pxrc->pm_mutex);
+	error = usb_submit_urb(pxrc->urb, GFP_KERNEL);
+	if (error) {
 		dev_err(&pxrc->intf->dev,
 			"%s - usb_submit_urb failed, error: %d\n",
-			__func__, retval);
-		retval = -EIO;
-		goto out;
+			__func__, error);
+		return -EIO;
 	}
 
 	pxrc->is_open = true;
-
-out:
-	mutex_unlock(&pxrc->pm_mutex);
-	return retval;
+	return 0;
 }
 
 static void pxrc_close(struct input_dev *input)
 {
 	struct pxrc *pxrc = input_get_drvdata(input);
 
-	mutex_lock(&pxrc->pm_mutex);
+	guard(mutex)(&pxrc->pm_mutex);
 	usb_kill_urb(pxrc->urb);
 	pxrc->is_open = false;
-	mutex_unlock(&pxrc->pm_mutex);
 }
 
 static void pxrc_free_urb(void *_pxrc)
@@ -208,10 +205,9 @@ static int pxrc_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct pxrc *pxrc = usb_get_intfdata(intf);
 
-	mutex_lock(&pxrc->pm_mutex);
+	guard(mutex)(&pxrc->pm_mutex);
 	if (pxrc->is_open)
 		usb_kill_urb(pxrc->urb);
-	mutex_unlock(&pxrc->pm_mutex);
 
 	return 0;
 }
@@ -219,14 +215,12 @@ static int pxrc_suspend(struct usb_interface *intf, pm_message_t message)
 static int pxrc_resume(struct usb_interface *intf)
 {
 	struct pxrc *pxrc = usb_get_intfdata(intf);
-	int retval = 0;
 
-	mutex_lock(&pxrc->pm_mutex);
+	guard(mutex)(&pxrc->pm_mutex);
 	if (pxrc->is_open && usb_submit_urb(pxrc->urb, GFP_KERNEL) < 0)
-		retval = -EIO;
+		return -EIO;
 
-	mutex_unlock(&pxrc->pm_mutex);
-	return retval;
+	return 0;
 }
 
 static int pxrc_pre_reset(struct usb_interface *intf)
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index e2c1848182de..b1244d7df6cc 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -1670,7 +1670,7 @@ static int xpad_led_probe(struct usb_xpad *xpad)
 	if (!led)
 		return -ENOMEM;
 
-	xpad->pad_nr = ida_simple_get(&xpad_pad_seq, 0, 0, GFP_KERNEL);
+	xpad->pad_nr = ida_alloc(&xpad_pad_seq, GFP_KERNEL);
 	if (xpad->pad_nr < 0) {
 		error = xpad->pad_nr;
 		goto err_free_mem;
@@ -1693,7 +1693,7 @@ static int xpad_led_probe(struct usb_xpad *xpad)
 	return 0;
 
 err_free_id:
-	ida_simple_remove(&xpad_pad_seq, xpad->pad_nr);
+	ida_free(&xpad_pad_seq, xpad->pad_nr);
 err_free_mem:
 	kfree(led);
 	xpad->led = NULL;
@@ -1706,7 +1706,7 @@ static void xpad_led_disconnect(struct usb_xpad *xpad)
 
 	if (xpad_led) {
 		led_classdev_unregister(&xpad_led->led_cdev);
-		ida_simple_remove(&xpad_pad_seq, xpad->pad_nr);
+		ida_free(&xpad_pad_seq, xpad->pad_nr);
 		kfree(xpad_led);
 	}
 }