Merge tag 'usb-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt updates from Greg KH:
 "Here is the big set of USB and Thunderbolt changes for 6.9-rc1. Lots
  of tiny changes and forward progress to support new hardware and
  better support for existing devices. Included in here are:

   - Thunderbolt (i.e. USB4) updates for newer hardware and uses as more
     people start to use the hardware

   - default USB authentication mode Kconfig and documentation update to
     make it more obvious what is going on

   - USB typec updates and enhancements

   - usual dwc3 driver updates

   - usual xhci driver updates

   - function USB (i.e. gadget) driver updates and additions

   - new device ids for lots of drivers

   - loads of other small updates, full details in the shortlog

  All of these, including a "last minute regression fix" have been in
  linux-next with no reported issues"

* tag 'usb-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (185 commits)
  usb: usb-acpi: Fix oops due to freeing uninitialized pld pointer
  usb: gadget: net2272: Use irqflags in the call to net2272_probe_fin
  usb: gadget: tegra-xudc: Fix USB3 PHY retrieval logic
  phy: tegra: xusb: Add API to retrieve the port number of phy
  USB: gadget: pxa27x_udc: Remove unused of_gpio.h
  usb: gadget/snps_udc_plat: Remove unused of_gpio.h
  usb: ohci-pxa27x: Remove unused of_gpio.h
  usb: sl811-hcd: only defined function checkdone if QUIRK2 is defined
  usb: Clarify expected behavior of dev_bin_attrs_are_visible()
  xhci: Allow RPM on the USB controller (1022:43f7) by default
  usb: isp1760: remove SLAB_MEM_SPREAD flag usage
  usb: misc: onboard_hub: use pointer consistently in the probe function
  usb: gadget: fsl: Increase size of name buffer for endpoints
  usb: gadget: fsl: Add of device table to enable module autoloading
  usb: typec: tcpm: add support to set tcpc connector orientatition
  usb: typec: tcpci: add generic tcpci fallback compatible
  dt-bindings: usb: typec-tcpci: add tcpci fallback binding
  usb: gadget: fsl-udc: Replace custom log wrappers by dev_{err,warn,dbg,vdbg}
  usb: core: Set connect_type of ports based on DT node
  dt-bindings: usb: Add downstream facing ports to realtek binding
  ...

1 files changed, 294 insertions, 0 deletions

diff --git a/drivers/usb/typec/mux/it5205.c b/drivers/usb/typec/mux/it5205.c
new file mode 100644
index 000000000000..5535932e42cd
--- /dev/null
+++ b/drivers/usb/typec/mux/it5205.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ITE IT5205 Type-C USB alternate mode passive mux
+ *
+ * Copyright (c) 2020 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec.h>
+#include <linux/usb/typec_dp.h>
+#include <linux/usb/typec_mux.h>
+
+#define IT5205_REG_CHIP_ID(x)	(0x4 + (x))
+#define IT5205FN_CHIP_ID	0x35323035 /* "5205" */
+
+/* MUX power down register */
+#define IT5205_REG_MUXPDR        0x10
+#define IT5205_MUX_POWER_DOWN    BIT(0)
+
+/* MUX control register */
+#define IT5205_REG_MUXCR         0x11
+#define IT5205_POLARITY_INVERTED BIT(4)
+#define IT5205_DP_USB_CTRL_MASK  GENMASK(3, 0)
+#define IT5205_DP                0x0f
+#define IT5205_DP_USB            0x03
+#define IT5205_USB               0x07
+
+/* Vref Select Register */
+#define IT5205_REG_VSR            0x10
+#define IT5205_VREF_SELECT_MASK   GENMASK(5, 4)
+#define IT5205_VREF_SELECT_3_3V   0x00
+#define IT5205_VREF_SELECT_OFF    0x20
+
+/* CSBU Over Voltage Protection Register */
+#define IT5205_REG_CSBUOVPSR      0x1e
+#define IT5205_OVP_SELECT_MASK    GENMASK(5, 4)
+#define IT5205_OVP_3_90V          0x00
+#define IT5205_OVP_3_68V          0x10
+#define IT5205_OVP_3_62V          0x20
+#define IT5205_OVP_3_57V          0x30
+
+/* CSBU Switch Register */
+#define IT5205_REG_CSBUSR         0x22
+#define IT5205_CSBUSR_SWITCH      BIT(0)
+
+/* Interrupt Switch Register */
+#define IT5205_REG_ISR            0x25
+#define IT5205_ISR_CSBU_MASK      BIT(4)
+#define IT5205_ISR_CSBU_OVP       BIT(0)
+
+struct it5205 {
+	struct i2c_client *client;
+	struct regmap *regmap;
+	struct typec_switch_dev *sw;
+	struct typec_mux_dev *mux;
+};
+
+static int it5205_switch_set(struct typec_switch_dev *sw, enum typec_orientation orientation)
+{
+	struct it5205 *it = typec_switch_get_drvdata(sw);
+
+	switch (orientation) {
+	case TYPEC_ORIENTATION_NORMAL:
+		regmap_update_bits(it->regmap, IT5205_REG_MUXCR,
+				   IT5205_POLARITY_INVERTED, 0);
+		break;
+	case TYPEC_ORIENTATION_REVERSE:
+		regmap_update_bits(it->regmap, IT5205_REG_MUXCR,
+				   IT5205_POLARITY_INVERTED, IT5205_POLARITY_INVERTED);
+		break;
+	case TYPEC_ORIENTATION_NONE:
+		fallthrough;
+	default:
+		regmap_write(it->regmap, IT5205_REG_MUXCR, 0);
+		break;
+	}
+
+	return 0;
+}
+
+static int it5205_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state)
+{
+	struct it5205 *it = typec_mux_get_drvdata(mux);
+	u8 val;
+
+	if (state->mode >= TYPEC_STATE_MODAL &&
+	    state->alt->svid != USB_TYPEC_DP_SID)
+		return -EINVAL;
+
+	switch (state->mode) {
+	case TYPEC_STATE_USB:
+		val = IT5205_USB;
+		break;
+	case TYPEC_DP_STATE_C:
+		fallthrough;
+	case TYPEC_DP_STATE_E:
+		val = IT5205_DP;
+		break;
+	case TYPEC_DP_STATE_D:
+		val = IT5205_DP_USB;
+		break;
+	case TYPEC_STATE_SAFE:
+		fallthrough;
+	default:
+		val = 0;
+		break;
+	}
+
+	return regmap_update_bits(it->regmap, IT5205_REG_MUXCR,
+				  IT5205_DP_USB_CTRL_MASK, val);
+}
+
+static irqreturn_t it5205_irq_handler(int irq, void *data)
+{
+	struct it5205 *it = data;
+	int ret;
+	u32 val;
+
+	ret = regmap_read(it->regmap, IT5205_REG_ISR, &val);
+	if (ret)
+		return IRQ_NONE;
+
+	if (val & IT5205_ISR_CSBU_OVP) {
+		dev_warn(&it->client->dev, "Overvoltage detected!\n");
+
+		/* Reset CSBU */
+		regmap_update_bits(it->regmap, IT5205_REG_CSBUSR,
+				   IT5205_CSBUSR_SWITCH, 0);
+		regmap_update_bits(it->regmap, IT5205_REG_CSBUSR,
+				   IT5205_CSBUSR_SWITCH, IT5205_CSBUSR_SWITCH);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void it5205_enable_ovp(struct it5205 *it)
+{
+	/* Select Vref 3.3v */
+	regmap_update_bits(it->regmap, IT5205_REG_VSR,
+			   IT5205_VREF_SELECT_MASK, IT5205_VREF_SELECT_3_3V);
+
+	/* Trigger OVP at 3.68V */
+	regmap_update_bits(it->regmap, IT5205_REG_CSBUOVPSR,
+			   IT5205_OVP_SELECT_MASK, IT5205_OVP_3_68V);
+
+	/* Unmask OVP interrupt */
+	regmap_update_bits(it->regmap, IT5205_REG_ISR,
+			   IT5205_ISR_CSBU_MASK, 0);
+
+	/* Enable CSBU Interrupt */
+	regmap_update_bits(it->regmap, IT5205_REG_CSBUSR,
+			   IT5205_CSBUSR_SWITCH, IT5205_CSBUSR_SWITCH);
+}
+
+static const struct regmap_config it5205_regmap = {
+	.max_register = 0x2f,
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int it5205_probe(struct i2c_client *client)
+{
+	struct typec_switch_desc sw_desc = { };
+	struct typec_mux_desc mux_desc = { };
+	struct device *dev = &client->dev;
+	struct it5205 *it;
+	u32 val, chipid = 0;
+	int i, ret;
+
+	it = devm_kzalloc(dev, sizeof(*it), GFP_KERNEL);
+	if (!it)
+		return -ENOMEM;
+
+	ret = devm_regulator_get_enable(dev, "vcc");
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get regulator\n");
+
+	it->client = client;
+
+	it->regmap = devm_regmap_init_i2c(client, &it5205_regmap);
+	if (IS_ERR(it->regmap))
+		return dev_err_probe(dev, PTR_ERR(it->regmap),
+				     "Failed to init regmap\n");
+
+	/* IT5205 needs a long time to power up after enabling regulator */
+	msleep(50);
+
+	/* Unset poweroff bit */
+	ret = regmap_write(it->regmap, IT5205_REG_MUXPDR, 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set power on\n");
+
+	/* Read the 32 bits ChipID */
+	for (i = 3; i >= 0; i--) {
+		ret = regmap_read(it->regmap, IT5205_REG_CHIP_ID(i), &val);
+		if (ret)
+			return ret;
+
+		chipid |= val << (i * 8);
+	}
+
+	if (chipid != IT5205FN_CHIP_ID)
+		return dev_err_probe(dev, -EINVAL,
+				     "Unknown ChipID 0x%x\n", chipid);
+
+	/* Initialize as USB mode with default (non-inverted) polarity */
+	ret = regmap_write(it->regmap, IT5205_REG_MUXCR, IT5205_USB);
+	if (ret)
+		return dev_err_probe(dev, ret, "Cannot set mode to USB\n");
+
+	sw_desc.drvdata = it;
+	sw_desc.fwnode = dev_fwnode(dev);
+	sw_desc.set = it5205_switch_set;
+
+	it->sw = typec_switch_register(dev, &sw_desc);
+	if (IS_ERR(it->sw))
+		return dev_err_probe(dev, PTR_ERR(it->sw),
+				     "failed to register typec switch\n");
+
+	mux_desc.drvdata = it;
+	mux_desc.fwnode = dev_fwnode(dev);
+	mux_desc.set = it5205_mux_set;
+
+	it->mux = typec_mux_register(dev, &mux_desc);
+	if (IS_ERR(it->mux)) {
+		typec_switch_unregister(it->sw);
+		return dev_err_probe(dev, PTR_ERR(it->mux),
+				     "failed to register typec mux\n");
+	}
+
+	i2c_set_clientdata(client, it);
+
+	if (of_property_read_bool(dev->of_node, "ite,ovp-enable") && client->irq) {
+		it5205_enable_ovp(it);
+
+		ret = devm_request_threaded_irq(dev, client->irq, NULL,
+						it5205_irq_handler,
+						IRQF_ONESHOT, dev_name(dev), it);
+		if (ret) {
+			typec_mux_unregister(it->mux);
+			typec_switch_unregister(it->sw);
+			return dev_err_probe(dev, ret, "Failed to request irq\n");
+		}
+	}
+
+	return 0;
+}
+
+static void it5205_remove(struct i2c_client *client)
+{
+	struct it5205 *it = i2c_get_clientdata(client);
+
+	typec_mux_unregister(it->mux);
+	typec_switch_unregister(it->sw);
+}
+
+static const struct i2c_device_id it5205_table[] = {
+	{ "it5205" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, it5205_table);
+
+static const struct of_device_id it5205_of_table[] = {
+	{ .compatible = "ite,it5205" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, it5205_of_table);
+
+static struct i2c_driver it5205_driver = {
+	.driver = {
+		.name = "it5205",
+		.of_match_table = it5205_of_table,
+	},
+	.probe = it5205_probe,
+	.remove = it5205_remove,
+	.id_table = it5205_table,
+};
+module_i2c_driver(it5205_driver);
+
+MODULE_AUTHOR("Tianping Fang <tianping.fang@mediatek.com>");
+MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
+MODULE_DESCRIPTION("ITE IT5205 alternate mode passive MUX driver");
+MODULE_LICENSE("GPL");