Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 365 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/da9034-ts.c b/drivers/input/touchscreen/da9034-ts.c
new file mode 100644
index 000000000..2943f6a58
--- /dev/null
+++ b/drivers/input/touchscreen/da9034-ts.c
@@ -0,0 +1,365 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Touchscreen driver for Dialog Semiconductor DA9034
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ *	Fengwei Yin <fengwei.yin@marvell.com>
+ *	Bin Yang  <bin.yang@marvell.com>
+ *	Eric Miao <eric.miao@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/mfd/da903x.h>
+#include <linux/slab.h>
+
+#define DA9034_MANUAL_CTRL	0x50
+#define DA9034_LDO_ADC_EN	(1 << 4)
+
+#define DA9034_AUTO_CTRL1	0x51
+
+#define DA9034_AUTO_CTRL2	0x52
+#define DA9034_AUTO_TSI_EN	(1 << 3)
+#define DA9034_PEN_DETECT	(1 << 4)
+
+#define DA9034_TSI_CTRL1	0x53
+#define DA9034_TSI_CTRL2	0x54
+#define DA9034_TSI_X_MSB	0x6c
+#define DA9034_TSI_Y_MSB	0x6d
+#define DA9034_TSI_XY_LSB	0x6e
+
+enum {
+	STATE_IDLE,	/* wait for pendown */
+	STATE_BUSY,	/* TSI busy sampling */
+	STATE_STOP,	/* sample available */
+	STATE_WAIT,	/* Wait to start next sample */
+};
+
+enum {
+	EVENT_PEN_DOWN,
+	EVENT_PEN_UP,
+	EVENT_TSI_READY,
+	EVENT_TIMEDOUT,
+};
+
+struct da9034_touch {
+	struct device		*da9034_dev;
+	struct input_dev	*input_dev;
+
+	struct delayed_work	tsi_work;
+	struct notifier_block	notifier;
+
+	int	state;
+
+	int	interval_ms;
+	int	x_inverted;
+	int	y_inverted;
+
+	int	last_x;
+	int	last_y;
+};
+
+static inline int is_pen_down(struct da9034_touch *touch)
+{
+	return da903x_query_status(touch->da9034_dev, DA9034_STATUS_PEN_DOWN);
+}
+
+static inline int detect_pen_down(struct da9034_touch *touch, int on)
+{
+	if (on)
+		return da903x_set_bits(touch->da9034_dev,
+				DA9034_AUTO_CTRL2, DA9034_PEN_DETECT);
+	else
+		return da903x_clr_bits(touch->da9034_dev,
+				DA9034_AUTO_CTRL2, DA9034_PEN_DETECT);
+}
+
+static int read_tsi(struct da9034_touch *touch)
+{
+	uint8_t _x, _y, _v;
+	int ret;
+
+	ret = da903x_read(touch->da9034_dev, DA9034_TSI_X_MSB, &_x);
+	if (ret)
+		return ret;
+
+	ret = da903x_read(touch->da9034_dev, DA9034_TSI_Y_MSB, &_y);
+	if (ret)
+		return ret;
+
+	ret = da903x_read(touch->da9034_dev, DA9034_TSI_XY_LSB, &_v);
+	if (ret)
+		return ret;
+
+	touch->last_x = ((_x << 2) & 0x3fc) | (_v & 0x3);
+	touch->last_y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2);
+
+	return 0;
+}
+
+static inline int start_tsi(struct da9034_touch *touch)
+{
+	return da903x_set_bits(touch->da9034_dev,
+			DA9034_AUTO_CTRL2, DA9034_AUTO_TSI_EN);
+}
+
+static inline int stop_tsi(struct da9034_touch *touch)
+{
+	return da903x_clr_bits(touch->da9034_dev,
+			DA9034_AUTO_CTRL2, DA9034_AUTO_TSI_EN);
+}
+
+static inline void report_pen_down(struct da9034_touch *touch)
+{
+	int x = touch->last_x;
+	int y = touch->last_y;
+
+	x &= 0xfff;
+	if (touch->x_inverted)
+		x = 1024 - x;
+	y &= 0xfff;
+	if (touch->y_inverted)
+		y = 1024 - y;
+
+	input_report_abs(touch->input_dev, ABS_X, x);
+	input_report_abs(touch->input_dev, ABS_Y, y);
+	input_report_key(touch->input_dev, BTN_TOUCH, 1);
+
+	input_sync(touch->input_dev);
+}
+
+static inline void report_pen_up(struct da9034_touch *touch)
+{
+	input_report_key(touch->input_dev, BTN_TOUCH, 0);
+	input_sync(touch->input_dev);
+}
+
+static void da9034_event_handler(struct da9034_touch *touch, int event)
+{
+	int err;
+
+	switch (touch->state) {
+	case STATE_IDLE:
+		if (event != EVENT_PEN_DOWN)
+			break;
+
+		/* Enable auto measurement of the TSI, this will
+		 * automatically disable pen down detection
+		 */
+		err = start_tsi(touch);
+		if (err)
+			goto err_reset;
+
+		touch->state = STATE_BUSY;
+		break;
+
+	case STATE_BUSY:
+		if (event != EVENT_TSI_READY)
+			break;
+
+		err = read_tsi(touch);
+		if (err)
+			goto err_reset;
+
+		/* Disable auto measurement of the TSI, so that
+		 * pen down status will be available
+		 */
+		err = stop_tsi(touch);
+		if (err)
+			goto err_reset;
+
+		touch->state = STATE_STOP;
+
+		/* FIXME: PEN_{UP/DOWN} events are expected to be
+		 * available by stopping TSI, but this is found not
+		 * always true, delay and simulate such an event
+		 * here is more reliable
+		 */
+		mdelay(1);
+		da9034_event_handler(touch,
+				     is_pen_down(touch) ? EVENT_PEN_DOWN :
+							  EVENT_PEN_UP);
+		break;
+
+	case STATE_STOP:
+		if (event == EVENT_PEN_DOWN) {
+			report_pen_down(touch);
+			schedule_delayed_work(&touch->tsi_work,
+				msecs_to_jiffies(touch->interval_ms));
+			touch->state = STATE_WAIT;
+		}
+
+		if (event == EVENT_PEN_UP) {
+			report_pen_up(touch);
+			touch->state = STATE_IDLE;
+		}
+		break;
+
+	case STATE_WAIT:
+		if (event != EVENT_TIMEDOUT)
+			break;
+
+		if (is_pen_down(touch)) {
+			start_tsi(touch);
+			touch->state = STATE_BUSY;
+		} else {
+			report_pen_up(touch);
+			touch->state = STATE_IDLE;
+		}
+		break;
+	}
+	return;
+
+err_reset:
+	touch->state = STATE_IDLE;
+	stop_tsi(touch);
+	detect_pen_down(touch, 1);
+}
+
+static void da9034_tsi_work(struct work_struct *work)
+{
+	struct da9034_touch *touch =
+		container_of(work, struct da9034_touch, tsi_work.work);
+
+	da9034_event_handler(touch, EVENT_TIMEDOUT);
+}
+
+static int da9034_touch_notifier(struct notifier_block *nb,
+				 unsigned long event, void *data)
+{
+	struct da9034_touch *touch =
+		container_of(nb, struct da9034_touch, notifier);
+
+	if (event & DA9034_EVENT_TSI_READY)
+		da9034_event_handler(touch, EVENT_TSI_READY);
+
+	if ((event & DA9034_EVENT_PEN_DOWN) && touch->state == STATE_IDLE)
+		da9034_event_handler(touch, EVENT_PEN_DOWN);
+
+	return 0;
+}
+
+static int da9034_touch_open(struct input_dev *dev)
+{
+	struct da9034_touch *touch = input_get_drvdata(dev);
+	int ret;
+
+	ret = da903x_register_notifier(touch->da9034_dev, &touch->notifier,
+			DA9034_EVENT_PEN_DOWN | DA9034_EVENT_TSI_READY);
+	if (ret)
+		return -EBUSY;
+
+	/* Enable ADC LDO */
+	ret = da903x_set_bits(touch->da9034_dev,
+			DA9034_MANUAL_CTRL, DA9034_LDO_ADC_EN);
+	if (ret)
+		return ret;
+
+	/* TSI_DELAY: 3 slots, TSI_SKIP: 3 slots */
+	ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL1, 0x1b);
+	if (ret)
+		return ret;
+
+	ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL2, 0x00);
+	if (ret)
+		return ret;
+
+	touch->state = STATE_IDLE;
+	detect_pen_down(touch, 1);
+
+	return 0;
+}
+
+static void da9034_touch_close(struct input_dev *dev)
+{
+	struct da9034_touch *touch = input_get_drvdata(dev);
+
+	da903x_unregister_notifier(touch->da9034_dev, &touch->notifier,
+			DA9034_EVENT_PEN_DOWN | DA9034_EVENT_TSI_READY);
+
+	cancel_delayed_work_sync(&touch->tsi_work);
+
+	touch->state = STATE_IDLE;
+	stop_tsi(touch);
+	detect_pen_down(touch, 0);
+
+	/* Disable ADC LDO */
+	da903x_clr_bits(touch->da9034_dev,
+			DA9034_MANUAL_CTRL, DA9034_LDO_ADC_EN);
+}
+
+
+static int da9034_touch_probe(struct platform_device *pdev)
+{
+	struct da9034_touch_pdata *pdata = dev_get_platdata(&pdev->dev);
+	struct da9034_touch *touch;
+	struct input_dev *input_dev;
+	int error;
+
+	touch = devm_kzalloc(&pdev->dev, sizeof(struct da9034_touch),
+			     GFP_KERNEL);
+	if (!touch) {
+		dev_err(&pdev->dev, "failed to allocate driver data\n");
+		return -ENOMEM;
+	}
+
+	touch->da9034_dev = pdev->dev.parent;
+
+	if (pdata) {
+		touch->interval_ms	= pdata->interval_ms;
+		touch->x_inverted	= pdata->x_inverted;
+		touch->y_inverted	= pdata->y_inverted;
+	} else {
+		/* fallback into default */
+		touch->interval_ms	= 10;
+	}
+
+	INIT_DELAYED_WORK(&touch->tsi_work, da9034_tsi_work);
+	touch->notifier.notifier_call = da9034_touch_notifier;
+
+	input_dev = devm_input_allocate_device(&pdev->dev);
+	if (!input_dev) {
+		dev_err(&pdev->dev, "failed to allocate input device\n");
+		return -ENOMEM;
+	}
+
+	input_dev->name		= pdev->name;
+	input_dev->open		= da9034_touch_open;
+	input_dev->close	= da9034_touch_close;
+	input_dev->dev.parent	= &pdev->dev;
+
+	__set_bit(EV_ABS, input_dev->evbit);
+	__set_bit(ABS_X, input_dev->absbit);
+	__set_bit(ABS_Y, input_dev->absbit);
+	input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
+
+	__set_bit(EV_KEY, input_dev->evbit);
+	__set_bit(BTN_TOUCH, input_dev->keybit);
+
+	touch->input_dev = input_dev;
+	input_set_drvdata(input_dev, touch);
+
+	error = input_register_device(input_dev);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static struct platform_driver da9034_touch_driver = {
+	.driver	= {
+		.name	= "da9034-touch",
+	},
+	.probe		= da9034_touch_probe,
+};
+module_platform_driver(da9034_touch_driver);
+
+MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9034");
+MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>, Bin Yang <bin.yang@marvell.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9034-touch");