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, 304 insertions, 0 deletions

diff --git a/drivers/input/misc/apanel.c b/drivers/input/misc/apanel.c
new file mode 100644
index 000000000..3eb02a64a
--- /dev/null
+++ b/drivers/input/misc/apanel.c
@@ -0,0 +1,304 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Fujitsu Lifebook Application Panel button drive
+ *
+ *  Copyright (C) 2007 Stephen Hemminger <shemminger@linux-foundation.org>
+ *  Copyright (C) 2001-2003 Jochen Eisinger <jochen@penguin-breeder.org>
+ *
+ * Many Fujitsu Lifebook laptops have a small panel of buttons that are
+ * accessible via the i2c/smbus interface. This driver polls those
+ * buttons and generates input events.
+ *
+ * For more details see:
+ *	http://apanel.sourceforge.net/tech.php
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+
+#define APANEL_NAME	"Fujitsu Application Panel"
+#define APANEL		"apanel"
+
+/* How often we poll keys - msecs */
+#define POLL_INTERVAL_DEFAULT	1000
+
+/* Magic constants in BIOS that tell about buttons */
+enum apanel_devid {
+	APANEL_DEV_NONE	  = 0,
+	APANEL_DEV_APPBTN = 1,
+	APANEL_DEV_CDBTN  = 2,
+	APANEL_DEV_LCD	  = 3,
+	APANEL_DEV_LED	  = 4,
+
+	APANEL_DEV_MAX,
+};
+
+enum apanel_chip {
+	CHIP_NONE    = 0,
+	CHIP_OZ992C  = 1,
+	CHIP_OZ163T  = 2,
+	CHIP_OZ711M3 = 4,
+};
+
+/* Result of BIOS snooping/probing -- what features are supported */
+static enum apanel_chip device_chip[APANEL_DEV_MAX];
+
+#define MAX_PANEL_KEYS	12
+
+struct apanel {
+	struct input_dev *idev;
+	struct i2c_client *client;
+	unsigned short keymap[MAX_PANEL_KEYS];
+	u16 nkeys;
+	struct led_classdev mail_led;
+};
+
+static const unsigned short apanel_keymap[MAX_PANEL_KEYS] = {
+	[0] = KEY_MAIL,
+	[1] = KEY_WWW,
+	[2] = KEY_PROG2,
+	[3] = KEY_PROG1,
+
+	[8] = KEY_FORWARD,
+	[9] = KEY_REWIND,
+	[10] = KEY_STOPCD,
+	[11] = KEY_PLAYPAUSE,
+};
+
+static void report_key(struct input_dev *input, unsigned keycode)
+{
+	dev_dbg(input->dev.parent, "report key %#x\n", keycode);
+	input_report_key(input, keycode, 1);
+	input_sync(input);
+
+	input_report_key(input, keycode, 0);
+	input_sync(input);
+}
+
+/* Poll for key changes
+ *
+ * Read Application keys via SMI
+ *  A (0x4), B (0x8), Internet (0x2), Email (0x1).
+ *
+ * CD keys:
+ * Forward (0x100), Rewind (0x200), Stop (0x400), Pause (0x800)
+ */
+static void apanel_poll(struct input_dev *idev)
+{
+	struct apanel *ap = input_get_drvdata(idev);
+	u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8;
+	s32 data;
+	int i;
+
+	data = i2c_smbus_read_word_data(ap->client, cmd);
+	if (data < 0)
+		return;	/* ignore errors (due to ACPI??) */
+
+	/* write back to clear latch */
+	i2c_smbus_write_word_data(ap->client, cmd, 0);
+
+	if (!data)
+		return;
+
+	dev_dbg(&idev->dev, APANEL ": data %#x\n", data);
+	for (i = 0; i < idev->keycodemax; i++)
+		if ((1u << i) & data)
+			report_key(idev, ap->keymap[i]);
+}
+
+static int mail_led_set(struct led_classdev *led,
+			 enum led_brightness value)
+{
+	struct apanel *ap = container_of(led, struct apanel, mail_led);
+	u16 led_bits = value != LED_OFF ? 0x8000 : 0x0000;
+
+	return i2c_smbus_write_word_data(ap->client, 0x10, led_bits);
+}
+
+static int apanel_probe(struct i2c_client *client)
+{
+	struct apanel *ap;
+	struct input_dev *idev;
+	u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8;
+	int i, err;
+
+	ap = devm_kzalloc(&client->dev, sizeof(*ap), GFP_KERNEL);
+	if (!ap)
+		return -ENOMEM;
+
+	idev = devm_input_allocate_device(&client->dev);
+	if (!idev)
+		return -ENOMEM;
+
+	ap->idev = idev;
+	ap->client = client;
+
+	i2c_set_clientdata(client, ap);
+
+	err = i2c_smbus_write_word_data(client, cmd, 0);
+	if (err) {
+		dev_warn(&client->dev, "smbus write error %d\n", err);
+		return err;
+	}
+
+	input_set_drvdata(idev, ap);
+
+	idev->name = APANEL_NAME " buttons";
+	idev->phys = "apanel/input0";
+	idev->id.bustype = BUS_HOST;
+
+	memcpy(ap->keymap, apanel_keymap, sizeof(apanel_keymap));
+	idev->keycode = ap->keymap;
+	idev->keycodesize = sizeof(ap->keymap[0]);
+	idev->keycodemax = (device_chip[APANEL_DEV_CDBTN] != CHIP_NONE) ? 12 : 4;
+
+	set_bit(EV_KEY, idev->evbit);
+	for (i = 0; i < idev->keycodemax; i++)
+		if (ap->keymap[i])
+			set_bit(ap->keymap[i], idev->keybit);
+
+	err = input_setup_polling(idev, apanel_poll);
+	if (err)
+		return err;
+
+	input_set_poll_interval(idev, POLL_INTERVAL_DEFAULT);
+
+	err = input_register_device(idev);
+	if (err)
+		return err;
+
+	if (device_chip[APANEL_DEV_LED] != CHIP_NONE) {
+		ap->mail_led.name = "mail:blue";
+		ap->mail_led.brightness_set_blocking = mail_led_set;
+		err = devm_led_classdev_register(&client->dev, &ap->mail_led);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static void apanel_shutdown(struct i2c_client *client)
+{
+	struct apanel *ap = i2c_get_clientdata(client);
+
+	if (device_chip[APANEL_DEV_LED] != CHIP_NONE)
+		led_set_brightness(&ap->mail_led, LED_OFF);
+}
+
+static const struct i2c_device_id apanel_id[] = {
+	{ .name = "fujitsu_apanel" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, apanel_id);
+
+static struct i2c_driver apanel_driver = {
+	.driver = {
+		.name = APANEL,
+	},
+	.probe		= apanel_probe,
+	.shutdown	= apanel_shutdown,
+	.id_table	= apanel_id,
+};
+
+/* Scan the system ROM for the signature "FJKEYINF" */
+static __init const void __iomem *bios_signature(const void __iomem *bios)
+{
+	ssize_t offset;
+	const unsigned char signature[] = "FJKEYINF";
+
+	for (offset = 0; offset < 0x10000; offset += 0x10) {
+		if (check_signature(bios + offset, signature,
+				    sizeof(signature)-1))
+			return bios + offset;
+	}
+	pr_notice(APANEL ": Fujitsu BIOS signature '%s' not found...\n",
+		  signature);
+	return NULL;
+}
+
+static int __init apanel_init(void)
+{
+	void __iomem *bios;
+	const void __iomem *p;
+	u8 devno;
+	unsigned char i2c_addr;
+	int found = 0;
+
+	bios = ioremap(0xF0000, 0x10000); /* Can't fail */
+
+	p = bios_signature(bios);
+	if (!p) {
+		iounmap(bios);
+		return -ENODEV;
+	}
+
+	/* just use the first address */
+	p += 8;
+	i2c_addr = readb(p + 3) >> 1;
+
+	for ( ; (devno = readb(p)) & 0x7f; p += 4) {
+		unsigned char method, slave, chip;
+
+		method = readb(p + 1);
+		chip = readb(p + 2);
+		slave = readb(p + 3) >> 1;
+
+		if (slave != i2c_addr) {
+			pr_notice(APANEL ": only one SMBus slave "
+				  "address supported, skipping device...\n");
+			continue;
+		}
+
+		/* translate alternative device numbers */
+		switch (devno) {
+		case 6:
+			devno = APANEL_DEV_APPBTN;
+			break;
+		case 7:
+			devno = APANEL_DEV_LED;
+			break;
+		}
+
+		if (devno >= APANEL_DEV_MAX)
+			pr_notice(APANEL ": unknown device %u found\n", devno);
+		else if (device_chip[devno] != CHIP_NONE)
+			pr_warn(APANEL ": duplicate entry for devno %u\n",
+				devno);
+
+		else if (method != 1 && method != 2 && method != 4) {
+			pr_notice(APANEL ": unknown method %u for devno %u\n",
+				  method, devno);
+		} else {
+			device_chip[devno] = (enum apanel_chip) chip;
+			++found;
+		}
+	}
+	iounmap(bios);
+
+	if (found == 0) {
+		pr_info(APANEL ": no input devices reported by BIOS\n");
+		return -EIO;
+	}
+
+	return i2c_add_driver(&apanel_driver);
+}
+module_init(apanel_init);
+
+static void __exit apanel_cleanup(void)
+{
+	i2c_del_driver(&apanel_driver);
+}
+module_exit(apanel_cleanup);
+
+MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
+MODULE_DESCRIPTION(APANEL_NAME " driver");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifeBook*:pvr*:rvnFUJITSU:*");
+MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifebook*:pvr*:rvnFUJITSU:*");