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, 376 insertions, 0 deletions

diff --git a/drivers/input/keyboard/sunkbd.c b/drivers/input/keyboard/sunkbd.c
new file mode 100644
index 000000000..5a0020827
--- /dev/null
+++ b/drivers/input/keyboard/sunkbd.c
@@ -0,0 +1,376 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ */
+
+/*
+ * Sun keyboard driver for Linux
+ */
+
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/workqueue.h>
+
+#define DRIVER_DESC	"Sun keyboard driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+static unsigned char sunkbd_keycode[128] = {
+	  0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112,
+	 65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106,  1,  2,  3,
+	  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 41, 14,110,113, 98, 55,
+	116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
+	 26, 27,111,127, 71, 72, 73, 74,134,135,107,  0, 29, 30, 31, 32,
+	 33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136,
+	104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101,
+	 79, 80, 81,  0,  0,  0,138, 58,125, 57,126,109, 86, 78
+};
+
+#define SUNKBD_CMD_RESET	0x1
+#define SUNKBD_CMD_BELLON	0x2
+#define SUNKBD_CMD_BELLOFF	0x3
+#define SUNKBD_CMD_CLICK	0xa
+#define SUNKBD_CMD_NOCLICK	0xb
+#define SUNKBD_CMD_SETLED	0xe
+#define SUNKBD_CMD_LAYOUT	0xf
+
+#define SUNKBD_RET_RESET	0xff
+#define SUNKBD_RET_ALLUP	0x7f
+#define SUNKBD_RET_LAYOUT	0xfe
+
+#define SUNKBD_LAYOUT_5_MASK	0x20
+#define SUNKBD_RELEASE		0x80
+#define SUNKBD_KEY		0x7f
+
+/*
+ * Per-keyboard data.
+ */
+
+struct sunkbd {
+	unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)];
+	struct input_dev *dev;
+	struct serio *serio;
+	struct work_struct tq;
+	wait_queue_head_t wait;
+	char name[64];
+	char phys[32];
+	char type;
+	bool enabled;
+	volatile s8 reset;
+	volatile s8 layout;
+};
+
+/*
+ * sunkbd_interrupt() is called by the low level driver when a character
+ * is received.
+ */
+
+static irqreturn_t sunkbd_interrupt(struct serio *serio,
+		unsigned char data, unsigned int flags)
+{
+	struct sunkbd *sunkbd = serio_get_drvdata(serio);
+
+	if (sunkbd->reset <= -1) {
+		/*
+		 * If cp[i] is 0xff, sunkbd->reset will stay -1.
+		 * The keyboard sends 0xff 0xff 0xID on powerup.
+		 */
+		sunkbd->reset = data;
+		wake_up_interruptible(&sunkbd->wait);
+		goto out;
+	}
+
+	if (sunkbd->layout == -1) {
+		sunkbd->layout = data;
+		wake_up_interruptible(&sunkbd->wait);
+		goto out;
+	}
+
+	switch (data) {
+
+	case SUNKBD_RET_RESET:
+		if (sunkbd->enabled)
+			schedule_work(&sunkbd->tq);
+		sunkbd->reset = -1;
+		break;
+
+	case SUNKBD_RET_LAYOUT:
+		sunkbd->layout = -1;
+		break;
+
+	case SUNKBD_RET_ALLUP: /* All keys released */
+		break;
+
+	default:
+		if (!sunkbd->enabled)
+			break;
+
+		if (sunkbd->keycode[data & SUNKBD_KEY]) {
+			input_report_key(sunkbd->dev,
+					 sunkbd->keycode[data & SUNKBD_KEY],
+					 !(data & SUNKBD_RELEASE));
+			input_sync(sunkbd->dev);
+		} else {
+			printk(KERN_WARNING
+				"sunkbd.c: Unknown key (scancode %#x) %s.\n",
+				data & SUNKBD_KEY,
+				data & SUNKBD_RELEASE ? "released" : "pressed");
+		}
+	}
+out:
+	return IRQ_HANDLED;
+}
+
+/*
+ * sunkbd_event() handles events from the input module.
+ */
+
+static int sunkbd_event(struct input_dev *dev,
+			unsigned int type, unsigned int code, int value)
+{
+	struct sunkbd *sunkbd = input_get_drvdata(dev);
+
+	switch (type) {
+
+	case EV_LED:
+
+		serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
+		serio_write(sunkbd->serio,
+			(!!test_bit(LED_CAPSL,   dev->led) << 3) |
+			(!!test_bit(LED_SCROLLL, dev->led) << 2) |
+			(!!test_bit(LED_COMPOSE, dev->led) << 1) |
+			 !!test_bit(LED_NUML,    dev->led));
+		return 0;
+
+	case EV_SND:
+
+		switch (code) {
+
+		case SND_CLICK:
+			serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
+			return 0;
+
+		case SND_BELL:
+			serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
+			return 0;
+		}
+
+		break;
+	}
+
+	return -1;
+}
+
+/*
+ * sunkbd_initialize() checks for a Sun keyboard attached, and determines
+ * its type.
+ */
+
+static int sunkbd_initialize(struct sunkbd *sunkbd)
+{
+	sunkbd->reset = -2;
+	serio_write(sunkbd->serio, SUNKBD_CMD_RESET);
+	wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
+	if (sunkbd->reset < 0)
+		return -1;
+
+	sunkbd->type = sunkbd->reset;
+
+	if (sunkbd->type == 4) {	/* Type 4 keyboard */
+		sunkbd->layout = -2;
+		serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
+		wait_event_interruptible_timeout(sunkbd->wait,
+						 sunkbd->layout >= 0, HZ / 4);
+		if (sunkbd->layout < 0)
+			return -1;
+		if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK)
+			sunkbd->type = 5;
+	}
+
+	return 0;
+}
+
+/*
+ * sunkbd_set_leds_beeps() sets leds and beeps to a state the computer remembers
+ * they were in.
+ */
+
+static void sunkbd_set_leds_beeps(struct sunkbd *sunkbd)
+{
+	serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
+	serio_write(sunkbd->serio,
+		(!!test_bit(LED_CAPSL,   sunkbd->dev->led) << 3) |
+		(!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) |
+		(!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) |
+		 !!test_bit(LED_NUML,    sunkbd->dev->led));
+	serio_write(sunkbd->serio,
+		SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
+	serio_write(sunkbd->serio,
+		SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
+}
+
+
+/*
+ * sunkbd_reinit() wait for the keyboard reset to complete and restores state
+ * of leds and beeps.
+ */
+
+static void sunkbd_reinit(struct work_struct *work)
+{
+	struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);
+
+	/*
+	 * It is OK that we check sunkbd->enabled without pausing serio,
+	 * as we only want to catch true->false transition that will
+	 * happen once and we will be woken up for it.
+	 */
+	wait_event_interruptible_timeout(sunkbd->wait,
+					 sunkbd->reset >= 0 || !sunkbd->enabled,
+					 HZ);
+
+	if (sunkbd->reset >= 0 && sunkbd->enabled)
+		sunkbd_set_leds_beeps(sunkbd);
+}
+
+static void sunkbd_enable(struct sunkbd *sunkbd, bool enable)
+{
+	scoped_guard(serio_pause_rx, sunkbd->serio)
+		sunkbd->enabled = enable;
+
+	if (!enable) {
+		wake_up_interruptible(&sunkbd->wait);
+		cancel_work_sync(&sunkbd->tq);
+	}
+}
+
+/*
+ * sunkbd_connect() probes for a Sun keyboard and fills the necessary
+ * structures.
+ */
+
+static int sunkbd_connect(struct serio *serio, struct serio_driver *drv)
+{
+	struct sunkbd *sunkbd;
+	struct input_dev *input_dev;
+	int err = -ENOMEM;
+	int i;
+
+	sunkbd = kzalloc_obj(*sunkbd);
+	input_dev = input_allocate_device();
+	if (!sunkbd || !input_dev)
+		goto fail1;
+
+	sunkbd->serio = serio;
+	sunkbd->dev = input_dev;
+	init_waitqueue_head(&sunkbd->wait);
+	INIT_WORK(&sunkbd->tq, sunkbd_reinit);
+	snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys);
+
+	serio_set_drvdata(serio, sunkbd);
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto fail2;
+
+	if (sunkbd_initialize(sunkbd) < 0) {
+		err = -ENODEV;
+		goto fail3;
+	}
+
+	snprintf(sunkbd->name, sizeof(sunkbd->name),
+		 "Sun Type %d keyboard", sunkbd->type);
+	memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));
+
+	input_dev->name = sunkbd->name;
+	input_dev->phys = sunkbd->phys;
+	input_dev->id.bustype = BUS_RS232;
+	input_dev->id.vendor  = SERIO_SUNKBD;
+	input_dev->id.product = sunkbd->type;
+	input_dev->id.version = 0x0100;
+	input_dev->dev.parent = &serio->dev;
+
+	input_set_drvdata(input_dev, sunkbd);
+
+	input_dev->event = sunkbd_event;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
+		BIT_MASK(EV_SND) | BIT_MASK(EV_REP);
+	input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) |
+		BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML);
+	input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL);
+
+	input_dev->keycode = sunkbd->keycode;
+	input_dev->keycodesize = sizeof(unsigned char);
+	input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
+	for (i = 0; i < ARRAY_SIZE(sunkbd_keycode); i++)
+		__set_bit(sunkbd->keycode[i], input_dev->keybit);
+	__clear_bit(KEY_RESERVED, input_dev->keybit);
+
+	sunkbd_enable(sunkbd, true);
+
+	err = input_register_device(sunkbd->dev);
+	if (err)
+		goto fail4;
+
+	return 0;
+
+ fail4:	sunkbd_enable(sunkbd, false);
+ fail3:	serio_close(serio);
+ fail2:	serio_set_drvdata(serio, NULL);
+ fail1:	input_free_device(input_dev);
+	kfree(sunkbd);
+	return err;
+}
+
+/*
+ * sunkbd_disconnect() unregisters and closes behind us.
+ */
+
+static void sunkbd_disconnect(struct serio *serio)
+{
+	struct sunkbd *sunkbd = serio_get_drvdata(serio);
+
+	sunkbd_enable(sunkbd, false);
+	input_unregister_device(sunkbd->dev);
+	serio_close(serio);
+	serio_set_drvdata(serio, NULL);
+	kfree(sunkbd);
+}
+
+static const struct serio_device_id sunkbd_serio_ids[] = {
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_SUNKBD,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_UNKNOWN, /* sunkbd does probe */
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);
+
+static struct serio_driver sunkbd_drv = {
+	.driver		= {
+		.name	= "sunkbd",
+	},
+	.description	= DRIVER_DESC,
+	.id_table	= sunkbd_serio_ids,
+	.interrupt	= sunkbd_interrupt,
+	.connect	= sunkbd_connect,
+	.disconnect	= sunkbd_disconnect,
+};
+
+module_serio_driver(sunkbd_drv);