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, 310 insertions, 0 deletions

diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
new file mode 100644
index 000000000..5be153f2c
--- /dev/null
+++ b/drivers/usb/serial/ipw.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * IPWireless 3G UMTS TDD Modem driver (USB connected)
+ *
+ *   Copyright (C) 2004 Roelf Diedericks <roelfd@inet.co.za>
+ *   Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * All information about the device was acquired using SnoopyPro
+ * on MSFT's O/S, and examing the MSFT drivers' debug output
+ * (insanely left _on_ in the enduser version)
+ *
+ * It was written out of frustration with the IPWireless USB modem
+ * supplied by Axity3G/Sentech South Africa not supporting
+ * Linux whatsoever.
+ *
+ * Nobody provided any proprietary information that was not already
+ * available for this device.
+ *
+ * The modem adheres to the "3GPP TS  27.007 AT command set for 3G
+ * User Equipment (UE)" standard, available from
+ * http://www.3gpp.org/ftp/Specs/html-info/27007.htm
+ *
+ * The code was only tested the IPWireless handheld modem distributed
+ * in South Africa by Sentech.
+ *
+ * It may work for Woosh Inc in .nz too, as it appears they use the
+ * same kit.
+ *
+ * There is still some work to be done in terms of handling
+ * DCD, DTR, RTS, CTS which are currently faked.
+ * It's good enough for PPP at this point. It's based off all kinds of
+ * code found in usb/serial and usb/class
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include "usb-wwan.h"
+
+#define DRIVER_AUTHOR	"Roelf Diedericks"
+#define DRIVER_DESC	"IPWireless tty driver"
+
+#define IPW_TTY_MAJOR	240	/* real device node major id, experimental range */
+#define IPW_TTY_MINORS	256	/* we support 256 devices, dunno why, it'd be insane :) */
+
+#define USB_IPW_MAGIC	0x6d02	/* magic number for ipw struct */
+
+
+/* Message sizes */
+#define EVENT_BUFFER_SIZE	0xFF
+#define CHAR2INT16(c1, c0)	(((u32)((c1) & 0xff) << 8) + (u32)((c0) & 0xff))
+
+/* vendor/product pairs that are known work with this driver*/
+#define IPW_VID		0x0bc3
+#define IPW_PID		0x0001
+
+
+/* Vendor commands: */
+
+/* baud rates */
+enum {
+	ipw_sio_b256000 = 0x000e,
+	ipw_sio_b128000 = 0x001d,
+	ipw_sio_b115200 = 0x0020,
+	ipw_sio_b57600  = 0x0040,
+	ipw_sio_b56000  = 0x0042,
+	ipw_sio_b38400  = 0x0060,
+	ipw_sio_b19200  = 0x00c0,
+	ipw_sio_b14400  = 0x0100,
+	ipw_sio_b9600   = 0x0180,
+	ipw_sio_b4800   = 0x0300,
+	ipw_sio_b2400   = 0x0600,
+	ipw_sio_b1200   = 0x0c00,
+	ipw_sio_b600    = 0x1800
+};
+
+/* data bits */
+#define ipw_dtb_7		0x700
+#define ipw_dtb_8		0x810	/* ok so the define is misleading, I know, but forces 8,n,1 */
+					/* I mean, is there a point to any other setting these days? :) */
+
+/* usb control request types : */
+#define IPW_SIO_RXCTL		0x00	/* control bulk rx channel transmissions, value=1/0 (on/off) */
+#define IPW_SIO_SET_BAUD	0x01	/* set baud, value=requested ipw_sio_bxxxx */
+#define IPW_SIO_SET_LINE	0x03	/* set databits, parity. value=ipw_dtb_x */
+#define IPW_SIO_SET_PIN		0x03	/* set/clear dtr/rts value=ipw_pin_xxx */
+#define IPW_SIO_POLL		0x08	/* get serial port status byte, call with value=0 */
+#define IPW_SIO_INIT		0x11	/* initializes ? value=0 (appears as first thing todo on open) */
+#define IPW_SIO_PURGE		0x12	/* purge all transmissions?, call with value=numchar_to_purge */
+#define IPW_SIO_HANDFLOW	0x13	/* set xon/xoff limits value=0, and a buffer of 0x10 bytes */
+#define IPW_SIO_SETCHARS	0x13	/* set the flowcontrol special chars, value=0, buf=6 bytes, */
+					/* last 2 bytes contain flowcontrol chars e.g. 00 00 00 00 11 13 */
+
+/* values used for request IPW_SIO_SET_PIN */
+#define IPW_PIN_SETDTR		0x101
+#define IPW_PIN_SETRTS		0x202
+#define IPW_PIN_CLRDTR		0x100
+#define IPW_PIN_CLRRTS		0x200 /* unconfirmed */
+
+/* values used for request IPW_SIO_RXCTL */
+#define IPW_RXBULK_ON		1
+#define IPW_RXBULK_OFF		0
+
+/* various 16 byte hardcoded transferbuffers used by flow control */
+#define IPW_BYTES_FLOWINIT	{ 0x01, 0, 0, 0, 0x40, 0, 0, 0, \
+					0, 0, 0, 0, 0, 0, 0, 0 }
+
+/* Interpretation of modem status lines */
+/* These need sorting out by individually connecting pins and checking
+ * results. FIXME!
+ * When data is being sent we see 0x30 in the lower byte; this must
+ * contain DSR and CTS ...
+ */
+#define IPW_DSR			((1<<4) | (1<<5))
+#define IPW_CTS			((1<<5) | (1<<4))
+
+#define IPW_WANTS_TO_SEND	0x30
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE(IPW_VID, IPW_PID) },
+	{ },
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static int ipw_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+	struct usb_device *udev = port->serial->dev;
+	struct device *dev = &port->dev;
+	u8 buf_flow_static[16] = IPW_BYTES_FLOWINIT;
+	u8 *buf_flow_init;
+	int result;
+
+	buf_flow_init = kmemdup(buf_flow_static, 16, GFP_KERNEL);
+	if (!buf_flow_init)
+		return -ENOMEM;
+
+	/* --1: Tell the modem to initialize (we think) From sniffs this is
+	 *	always the first thing that gets sent to the modem during
+	 *	opening of the device */
+	dev_dbg(dev, "%s: Sending SIO_INIT (we guess)\n", __func__);
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_INIT,
+			 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 0,
+			 0, /* index */
+			 NULL,
+			 0,
+			 100000);
+	if (result < 0)
+		dev_err(dev, "Init of modem failed (error = %d)\n", result);
+
+	/* reset the bulk pipes */
+	usb_clear_halt(udev, usb_rcvbulkpipe(udev, port->bulk_in_endpointAddress));
+	usb_clear_halt(udev, usb_sndbulkpipe(udev, port->bulk_out_endpointAddress));
+
+	/*--2: Start reading from the device */
+	dev_dbg(dev, "%s: setting up bulk read callback\n", __func__);
+	usb_wwan_open(tty, port);
+
+	/*--3: Tell the modem to open the floodgates on the rx bulk channel */
+	dev_dbg(dev, "%s:asking modem for RxRead (RXBULK_ON)\n", __func__);
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_RXCTL,
+			 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 IPW_RXBULK_ON,
+			 0, /* index */
+			 NULL,
+			 0,
+			 100000);
+	if (result < 0)
+		dev_err(dev, "Enabling bulk RxRead failed (error = %d)\n", result);
+
+	/*--4: setup the initial flowcontrol */
+	dev_dbg(dev, "%s:setting init flowcontrol (%s)\n", __func__, buf_flow_init);
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_HANDFLOW,
+			 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 0,
+			 0,
+			 buf_flow_init,
+			 0x10,
+			 200000);
+	if (result < 0)
+		dev_err(dev, "initial flowcontrol failed (error = %d)\n", result);
+
+	kfree(buf_flow_init);
+	return 0;
+}
+
+static int ipw_attach(struct usb_serial *serial)
+{
+	struct usb_wwan_intf_private *data;
+
+	data = kzalloc_obj(struct usb_wwan_intf_private);
+	if (!data)
+		return -ENOMEM;
+
+	spin_lock_init(&data->susp_lock);
+	usb_set_serial_data(serial, data);
+	return 0;
+}
+
+static void ipw_release(struct usb_serial *serial)
+{
+	struct usb_wwan_intf_private *data = usb_get_serial_data(serial);
+
+	usb_set_serial_data(serial, NULL);
+	kfree(data);
+}
+
+static void ipw_dtr_rts(struct usb_serial_port *port, int on)
+{
+	struct usb_device *udev = port->serial->dev;
+	struct device *dev = &port->dev;
+	int result;
+
+	dev_dbg(dev, "%s: on = %d\n", __func__, on);
+
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_SET_PIN,
+			 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 on ? IPW_PIN_SETDTR : IPW_PIN_CLRDTR,
+			 0,
+			 NULL,
+			 0,
+			 200000);
+	if (result < 0)
+		dev_err(dev, "setting dtr failed (error = %d)\n", result);
+
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_SET_PIN, USB_TYPE_VENDOR |
+					USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 on ? IPW_PIN_SETRTS : IPW_PIN_CLRRTS,
+			 0,
+			 NULL,
+			 0,
+			 200000);
+	if (result < 0)
+		dev_err(dev, "setting rts failed (error = %d)\n", result);
+}
+
+static void ipw_close(struct usb_serial_port *port)
+{
+	struct usb_device *udev = port->serial->dev;
+	struct device *dev = &port->dev;
+	int result;
+
+	/*--3: purge */
+	dev_dbg(dev, "%s:sending purge\n", __func__);
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_PURGE, USB_TYPE_VENDOR |
+			 		USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 0x03,
+			 0,
+			 NULL,
+			 0,
+			 200000);
+	if (result < 0)
+		dev_err(dev, "purge failed (error = %d)\n", result);
+
+
+	/* send RXBULK_off (tell modem to stop transmitting bulk data on
+	   rx chan) */
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			 IPW_SIO_RXCTL,
+			 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+			 IPW_RXBULK_OFF,
+			 0, /* index */
+			 NULL,
+			 0,
+			 100000);
+
+	if (result < 0)
+		dev_err(dev, "Disabling bulk RxRead failed (error = %d)\n", result);
+
+	usb_wwan_close(port);
+}
+
+static struct usb_serial_driver ipw_device = {
+	.driver = {
+		.name =		"ipw",
+	},
+	.description =		"IPWireless converter",
+	.id_table =		id_table,
+	.num_ports =		1,
+	.open =			ipw_open,
+	.close =		ipw_close,
+	.attach =		ipw_attach,
+	.release =		ipw_release,
+	.port_probe =		usb_wwan_port_probe,
+	.port_remove =		usb_wwan_port_remove,
+	.dtr_rts =		ipw_dtr_rts,
+	.write =		usb_wwan_write,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&ipw_device, NULL
+};
+
+module_usb_serial_driver(serial_drivers, id_table);
+
+/* Module information */
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");