Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/phy/ti/phy-tusb1210.c b/drivers/phy/ti/phy-tusb1210.c
new file mode 100644
index 000000000..d8d0cc11d
--- /dev/null
+++ b/drivers/phy/ti/phy-tusb1210.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * tusb1210.c - TUSB1210 USB ULPI PHY driver
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+#include <linux/module.h>
+#include <linux/ulpi/driver.h>
+#include <linux/ulpi/regs.h>
+#include <linux/gpio/consumer.h>
+#include <linux/phy/ulpi_phy.h>
+
+#define TUSB1210_VENDOR_SPECIFIC2		0x80
+#define TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT	0
+#define TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT	4
+#define TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT	6
+
+struct tusb1210 {
+	struct ulpi *ulpi;
+	struct phy *phy;
+	struct gpio_desc *gpio_reset;
+	struct gpio_desc *gpio_cs;
+	u8 vendor_specific2;
+};
+
+static int tusb1210_power_on(struct phy *phy)
+{
+	struct tusb1210 *tusb = phy_get_drvdata(phy);
+
+	gpiod_set_value_cansleep(tusb->gpio_reset, 1);
+	gpiod_set_value_cansleep(tusb->gpio_cs, 1);
+
+	/* Restore the optional eye diagram optimization value */
+	if (tusb->vendor_specific2)
+		ulpi_write(tusb->ulpi, TUSB1210_VENDOR_SPECIFIC2,
+			   tusb->vendor_specific2);
+
+	return 0;
+}
+
+static int tusb1210_power_off(struct phy *phy)
+{
+	struct tusb1210 *tusb = phy_get_drvdata(phy);
+
+	gpiod_set_value_cansleep(tusb->gpio_reset, 0);
+	gpiod_set_value_cansleep(tusb->gpio_cs, 0);
+
+	return 0;
+}
+
+static int tusb1210_set_mode(struct phy *phy, enum phy_mode mode, int submode)
+{
+	struct tusb1210 *tusb = phy_get_drvdata(phy);
+	int ret;
+
+	ret = ulpi_read(tusb->ulpi, ULPI_OTG_CTRL);
+	if (ret < 0)
+		return ret;
+
+	switch (mode) {
+	case PHY_MODE_USB_HOST:
+		ret |= (ULPI_OTG_CTRL_DRVVBUS_EXT
+			| ULPI_OTG_CTRL_ID_PULLUP
+			| ULPI_OTG_CTRL_DP_PULLDOWN
+			| ULPI_OTG_CTRL_DM_PULLDOWN);
+		ulpi_write(tusb->ulpi, ULPI_OTG_CTRL, ret);
+		ret |= ULPI_OTG_CTRL_DRVVBUS;
+		break;
+	case PHY_MODE_USB_DEVICE:
+		ret &= ~(ULPI_OTG_CTRL_DRVVBUS
+			 | ULPI_OTG_CTRL_DP_PULLDOWN
+			 | ULPI_OTG_CTRL_DM_PULLDOWN);
+		ulpi_write(tusb->ulpi, ULPI_OTG_CTRL, ret);
+		ret &= ~ULPI_OTG_CTRL_DRVVBUS_EXT;
+		break;
+	default:
+		/* nothing */
+		return 0;
+	}
+
+	return ulpi_write(tusb->ulpi, ULPI_OTG_CTRL, ret);
+}
+
+static const struct phy_ops phy_ops = {
+	.power_on = tusb1210_power_on,
+	.power_off = tusb1210_power_off,
+	.set_mode = tusb1210_set_mode,
+	.owner = THIS_MODULE,
+};
+
+static int tusb1210_probe(struct ulpi *ulpi)
+{
+	struct tusb1210 *tusb;
+	u8 val, reg;
+
+	tusb = devm_kzalloc(&ulpi->dev, sizeof(*tusb), GFP_KERNEL);
+	if (!tusb)
+		return -ENOMEM;
+
+	tusb->gpio_reset = devm_gpiod_get_optional(&ulpi->dev, "reset",
+						   GPIOD_OUT_LOW);
+	if (IS_ERR(tusb->gpio_reset))
+		return PTR_ERR(tusb->gpio_reset);
+
+	gpiod_set_value_cansleep(tusb->gpio_reset, 1);
+
+	tusb->gpio_cs = devm_gpiod_get_optional(&ulpi->dev, "cs",
+						GPIOD_OUT_LOW);
+	if (IS_ERR(tusb->gpio_cs))
+		return PTR_ERR(tusb->gpio_cs);
+
+	gpiod_set_value_cansleep(tusb->gpio_cs, 1);
+
+	/*
+	 * VENDOR_SPECIFIC2 register in TUSB1210 can be used for configuring eye
+	 * diagram optimization and DP/DM swap.
+	 */
+
+	/* High speed output drive strength configuration */
+	device_property_read_u8(&ulpi->dev, "ihstx", &val);
+	reg = val << TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT;
+
+	/* High speed output impedance configuration */
+	device_property_read_u8(&ulpi->dev, "zhsdrv", &val);
+	reg |= val << TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT;
+
+	/* DP/DM swap control */
+	device_property_read_u8(&ulpi->dev, "datapolarity", &val);
+	reg |= val << TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT;
+
+	if (reg) {
+		ulpi_write(ulpi, TUSB1210_VENDOR_SPECIFIC2, reg);
+		tusb->vendor_specific2 = reg;
+	}
+
+	tusb->phy = ulpi_phy_create(ulpi, &phy_ops);
+	if (IS_ERR(tusb->phy))
+		return PTR_ERR(tusb->phy);
+
+	tusb->ulpi = ulpi;
+
+	phy_set_drvdata(tusb->phy, tusb);
+	ulpi_set_drvdata(ulpi, tusb);
+	return 0;
+}
+
+static void tusb1210_remove(struct ulpi *ulpi)
+{
+	struct tusb1210 *tusb = ulpi_get_drvdata(ulpi);
+
+	ulpi_phy_destroy(ulpi, tusb->phy);
+}
+
+#define TI_VENDOR_ID 0x0451
+
+static const struct ulpi_device_id tusb1210_ulpi_id[] = {
+	{ TI_VENDOR_ID, 0x1507, },  /* TUSB1210 */
+	{ TI_VENDOR_ID, 0x1508, },  /* TUSB1211 */
+	{ },
+};
+MODULE_DEVICE_TABLE(ulpi, tusb1210_ulpi_id);
+
+static struct ulpi_driver tusb1210_driver = {
+	.id_table = tusb1210_ulpi_id,
+	.probe = tusb1210_probe,
+	.remove = tusb1210_remove,
+	.driver = {
+		.name = "tusb1210",
+		.owner = THIS_MODULE,
+	},
+};
+
+module_ulpi_driver(tusb1210_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TUSB1210 ULPI PHY driver");