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, 191 insertions, 0 deletions

diff --git a/drivers/hid/hid-holtekff.c b/drivers/hid/hid-holtekff.c
new file mode 100644
index 000000000..4834d42b2
--- /dev/null
+++ b/drivers/hid/hid-holtekff.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Force feedback support for Holtek On Line Grip based gamepads
+ *
+ *  These include at least a Brazilian "Clone Joypad Super Power Fire"
+ *  which uses vendor ID 0x1241 and identifies as "HOLTEK On Line Grip".
+ *
+ *  Copyright (c) 2011 Anssi Hannula <anssi.hannula@iki.fi>
+ */
+
+/*
+ */
+
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "hid-ids.h"
+
+#ifdef CONFIG_HOLTEK_FF
+
+/*
+ * These commands and parameters are currently known:
+ *
+ * byte 0: command id:
+ * 	01  set effect parameters
+ * 	02  play specified effect
+ * 	03  stop specified effect
+ * 	04  stop all effects
+ * 	06  stop all effects
+ * 	(the difference between 04 and 06 isn't known; win driver
+ * 	 sends 06,04 on application init, and 06 otherwise)
+ * 
+ * Commands 01 and 02 need to be sent as pairs, i.e. you need to send 01
+ * before each 02.
+ *
+ * The rest of the bytes are parameters. Command 01 takes all of them, and
+ * commands 02,03 take only the effect id.
+ *
+ * byte 1:
+ *	bits 0-3: effect id:
+ * 		1: very strong rumble
+ * 		2: periodic rumble, short intervals
+ * 		3: very strong rumble
+ * 		4: periodic rumble, long intervals
+ * 		5: weak periodic rumble, long intervals
+ * 		6: weak periodic rumble, short intervals
+ * 		7: periodic rumble, short intervals
+ * 		8: strong periodic rumble, short intervals
+ * 		9: very strong rumble
+ * 		a: causes an error
+ * 		b: very strong periodic rumble, very short intervals
+ * 		c-f: nothing
+ *	bit 6: right (weak) motor enabled
+ *	bit 7: left (strong) motor enabled
+ *
+ * bytes 2-3:  time in milliseconds, big-endian
+ * bytes 5-6:  unknown (win driver seems to use at least 10e0 with effect 1
+ * 		       and 0014 with effect 6)
+ * byte 7:
+ *	bits 0-3: effect magnitude
+ */
+
+#define HOLTEKFF_MSG_LENGTH     7
+
+static const u8 start_effect_1[] = { 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
+static const u8 stop_all4[] =	   { 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+static const u8 stop_all6[] =	   { 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+struct holtekff_device {
+	struct hid_field *field;
+};
+
+static void holtekff_send(struct holtekff_device *holtekff,
+			  struct hid_device *hid,
+			  const u8 data[HOLTEKFF_MSG_LENGTH])
+{
+	int i;
+
+	for (i = 0; i < HOLTEKFF_MSG_LENGTH; i++) {
+		holtekff->field->value[i] = data[i];
+	}
+
+	dbg_hid("sending %7ph\n", data);
+
+	hid_hw_request(hid, holtekff->field->report, HID_REQ_SET_REPORT);
+}
+
+static int holtekff_play(struct input_dev *dev, void *data,
+			 struct ff_effect *effect)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+	struct holtekff_device *holtekff = data;
+	int left, right;
+	/* effect type 1, length 65535 msec */
+	u8 buf[HOLTEKFF_MSG_LENGTH] =
+		{ 0x01, 0x01, 0xff, 0xff, 0x10, 0xe0, 0x00 };
+
+	left = effect->u.rumble.strong_magnitude;
+	right = effect->u.rumble.weak_magnitude;
+	dbg_hid("called with 0x%04x 0x%04x\n", left, right);
+
+	if (!left && !right) {
+		holtekff_send(holtekff, hid, stop_all6);
+		return 0;
+	}
+
+	if (left)
+		buf[1] |= 0x80;
+	if (right)
+		buf[1] |= 0x40;
+
+	/* The device takes a single magnitude, so we just sum them up. */
+	buf[6] = min(0xf, (left >> 12) + (right >> 12));
+
+	holtekff_send(holtekff, hid, buf);
+	holtekff_send(holtekff, hid, start_effect_1);
+
+	return 0;
+}
+
+static int holtek_input_configured(struct hid_device *hid, struct hid_input *hidinput)
+{
+	struct holtekff_device *holtekff;
+	struct hid_report *report;
+	struct list_head *report_list =
+			&hid->report_enum[HID_OUTPUT_REPORT].report_list;
+	struct input_dev *dev = hidinput->input;
+	int error;
+
+	if (!list_is_first(&hidinput->list, &hid->inputs))
+		return 0;
+
+	report = list_first_entry_or_null(report_list, struct hid_report, list);
+	if (!report) {
+		hid_err(hid, "no output report found\n");
+		return -ENODEV;
+	}
+
+	if (report->maxfield < 1 || report->field[0]->report_count != 7) {
+		hid_err(hid, "unexpected output report layout\n");
+		return -ENODEV;
+	}
+
+	holtekff = kzalloc_obj(*holtekff);
+	if (!holtekff)
+		return -ENOMEM;
+
+	set_bit(FF_RUMBLE, dev->ffbit);
+
+	holtekff->field = report->field[0];
+
+	/* initialize the same way as win driver does */
+	holtekff_send(holtekff, hid, stop_all4);
+	holtekff_send(holtekff, hid, stop_all6);
+
+	error = input_ff_create_memless(dev, holtekff, holtekff_play);
+	if (error) {
+		kfree(holtekff);
+		return error;
+	}
+
+	hid_info(hid, "Force feedback for Holtek On Line Grip based devices by Anssi Hannula <anssi.hannula@iki.fi>\n");
+
+	return 0;
+}
+#else
+static inline int holtek_input_configured(struct hid_device *hid,
+					  struct hid_input *hidinput)
+{
+	return 0;
+}
+#endif
+
+static const struct hid_device_id holtek_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, holtek_devices);
+
+static struct hid_driver holtek_driver = {
+	.name = "holtek",
+	.id_table = holtek_devices,
+	.input_configured = holtek_input_configured,
+};
+module_hid_driver(holtek_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Anssi Hannula <anssi.hannula@iki.fi>");
+MODULE_DESCRIPTION("Force feedback support for Holtek On Line Grip based devices");