usb: dwc3: Remove dwc3 glue driver support for STi

STi will migrate to dwc3-generic driver, dwc3-sti-glue driver
can be removed.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Marek Vasut <marex@denx.de>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20250130163547.512990-4-patrice.chotard@foss.st.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

6 files changed, 0 insertions, 307 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 10f7f1fd180..8834737ebf9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -671,8 +671,6 @@ F:	drivers/reset/sti-reset.c
 F:	drivers/serial/serial_sti_asc.c
 F:	drivers/sysreset/sysreset_sti.c
 F:	drivers/timer/arm_global_timer.c
-F:	drivers/usb/host/dwc3-sti-glue.c
-F:	include/dwc3-sti-glue.h
 F:	include/dt-bindings/clock/stih407-clks.h
 F:	include/dt-bindings/clock/stih410-clks.h
 F:	include/dt-bindings/reset/stih407-resets.h
diff --git a/board/st/stih410-b2260/board.c b/board/st/stih410-b2260/board.c
index a912712c9dd..3a495eb5089 100644
--- a/board/st/stih410-b2260/board.c
+++ b/board/st/stih410-b2260/board.c
@@ -9,7 +9,6 @@
 #include <asm/cache.h>
 #include <asm/global_data.h>
 #include <linux/usb/otg.h>
-#include <dwc3-sti-glue.h>
 #include <dwc3-uboot.h>
 #include <usb.h>
 
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index a656265890e..3dc79770eeb 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -110,15 +110,6 @@ config USB_XHCI_RCAR
 	  Choose this option to add support for USB 3.0 driver on Renesas
 	  R-Car Gen3 SoCs.
 
-config USB_XHCI_STI
-	bool "Support for STMicroelectronics STiH407 family on-chip xHCI USB controller"
-	depends on ARCH_STI
-	default y
-	help
-	  Enables support for the on-chip xHCI controller on STMicroelectronics
-	  STiH407 family SoCs. This is a driver for the dwc3 to provide the glue logic
-	  to configure the controller.
-
 config USB_XHCI_DRA7XX_INDEX
 	int "DRA7XX xHCI USB index"
 	range 0 1
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 301bb9fdee1..902d68d0378 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -54,7 +54,6 @@ obj-$(CONFIG_USB_XHCI_GENERIC) += xhci-generic.o
 obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
 obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
 obj-$(CONFIG_USB_XHCI_RCAR) += xhci-rcar.o
-obj-$(CONFIG_USB_XHCI_STI) += dwc3-sti-glue.o
 obj-$(CONFIG_USB_XHCI_OCTEON) += dwc3-octeon-glue.o
 
 # designware
diff --git a/drivers/usb/host/dwc3-sti-glue.c b/drivers/usb/host/dwc3-sti-glue.c
deleted file mode 100644
index 3e6834e38e3..00000000000
--- a/drivers/usb/host/dwc3-sti-glue.c
+++ /dev/null
@@ -1,253 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * STiH407 family DWC3 specific Glue layer
- *
- * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
- * Author(s): Patrice Chotard, <patrice.chotard@foss.st.com> for STMicroelectronics.
- */
-
-#include <log.h>
-#include <asm/global_data.h>
-#include <asm/io.h>
-#include <dm.h>
-#include <errno.h>
-#include <dm/lists.h>
-#include <regmap.h>
-#include <reset-uclass.h>
-#include <syscon.h>
-#include <usb.h>
-#include <linux/printk.h>
-
-#include <linux/usb/dwc3.h>
-#include <linux/usb/otg.h>
-#include <dwc3-sti-glue.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/*
- * struct sti_dwc3_glue_plat - dwc3 STi glue driver private structure
- * @syscfg_base:	addr for the glue syscfg
- * @glue_base:		addr for the glue registers
- * @syscfg_offset:	usb syscfg control offset
- * @powerdown_ctl:	rest controller for powerdown signal
- * @softreset_ctl:	reset controller for softreset signal
- * @mode:		drd static host/device config
- */
-struct sti_dwc3_glue_plat {
-	phys_addr_t syscfg_base;
-	phys_addr_t glue_base;
-	phys_addr_t syscfg_offset;
-	struct reset_ctl powerdown_ctl;
-	struct reset_ctl softreset_ctl;
-	enum usb_dr_mode mode;
-};
-
-static int sti_dwc3_glue_drd_init(struct sti_dwc3_glue_plat *plat)
-{
-	unsigned long val;
-
-	val = readl(plat->syscfg_base + plat->syscfg_offset);
-
-	val &= USB3_CONTROL_MASK;
-
-	switch (plat->mode) {
-	case USB_DR_MODE_PERIPHERAL:
-		val &= ~(USB3_DELAY_VBUSVALID
-			| USB3_SEL_FORCE_OPMODE | USB3_FORCE_OPMODE(0x3)
-			| USB3_SEL_FORCE_DPPULLDOWN2 | USB3_FORCE_DPPULLDOWN2
-			| USB3_SEL_FORCE_DMPULLDOWN2 | USB3_FORCE_DMPULLDOWN2);
-
-		val |= USB3_DEVICE_NOT_HOST | USB3_FORCE_VBUSVALID;
-		break;
-
-	case USB_DR_MODE_HOST:
-		val &= ~(USB3_DEVICE_NOT_HOST | USB3_FORCE_VBUSVALID
-			| USB3_SEL_FORCE_OPMODE	| USB3_FORCE_OPMODE(0x3)
-			| USB3_SEL_FORCE_DPPULLDOWN2 | USB3_FORCE_DPPULLDOWN2
-			| USB3_SEL_FORCE_DMPULLDOWN2 | USB3_FORCE_DMPULLDOWN2);
-
-		val |= USB3_DELAY_VBUSVALID;
-		break;
-
-	default:
-		pr_err("Unsupported mode of operation %d\n", plat->mode);
-		return -EINVAL;
-	}
-	writel(val, plat->syscfg_base + plat->syscfg_offset);
-
-	return 0;
-}
-
-static void sti_dwc3_glue_init(struct sti_dwc3_glue_plat *plat)
-{
-	unsigned long reg;
-
-	reg = readl(plat->glue_base + CLKRST_CTRL);
-
-	reg |= AUX_CLK_EN | EXT_CFG_RESET_N | XHCI_REVISION;
-	reg &= ~SW_PIPEW_RESET_N;
-
-	writel(reg, plat->glue_base + CLKRST_CTRL);
-
-	/* configure mux for vbus, powerpresent and bvalid signals */
-	reg = readl(plat->glue_base + USB2_VBUS_MNGMNT_SEL1);
-
-	reg |= SEL_OVERRIDE_VBUSVALID(USB2_VBUS_UTMIOTG) |
-	       SEL_OVERRIDE_POWERPRESENT(USB2_VBUS_UTMIOTG) |
-	       SEL_OVERRIDE_BVALID(USB2_VBUS_UTMIOTG);
-
-	writel(reg, plat->glue_base + USB2_VBUS_MNGMNT_SEL1);
-
-	setbits_le32(plat->glue_base + CLKRST_CTRL, SW_PIPEW_RESET_N);
-}
-
-static int sti_dwc3_glue_of_to_plat(struct udevice *dev)
-{
-	struct sti_dwc3_glue_plat *plat = dev_get_plat(dev);
-	struct udevice *syscon;
-	struct regmap *regmap;
-	int ret;
-	u32 reg[4];
-
-	ret = ofnode_read_u32_array(dev_ofnode(dev), "reg", reg,
-				    ARRAY_SIZE(reg));
-	if (ret) {
-		pr_err("unable to find st,stih407-dwc3 reg property(%d)\n", ret);
-		return ret;
-	}
-
-	plat->glue_base = reg[0];
-	plat->syscfg_offset = reg[2];
-
-	/* get corresponding syscon phandle */
-	ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, "st,syscfg",
-					   &syscon);
-	if (ret) {
-		pr_err("unable to find syscon device (%d)\n", ret);
-		return ret;
-	}
-
-	/* get syscfg-reg base address */
-	regmap = syscon_get_regmap(syscon);
-	if (!regmap) {
-		pr_err("unable to find regmap\n");
-		return -ENODEV;
-	}
-	plat->syscfg_base = regmap->ranges[0].start;
-
-	/* get powerdown reset */
-	ret = reset_get_by_name(dev, "powerdown", &plat->powerdown_ctl);
-	if (ret) {
-		pr_err("can't get powerdown reset for %s (%d)", dev->name, ret);
-		return ret;
-	}
-
-	/* get softreset reset */
-	ret = reset_get_by_name(dev, "softreset", &plat->softreset_ctl);
-	if (ret)
-		pr_err("can't get soft reset for %s (%d)", dev->name, ret);
-
-	return ret;
-};
-
-static int sti_dwc3_glue_bind(struct udevice *dev)
-{
-	struct sti_dwc3_glue_plat *plat = dev_get_plat(dev);
-	ofnode node, dwc3_node;
-
-	/* Find snps,dwc3 node from subnode */
-	ofnode_for_each_subnode(node, dev_ofnode(dev)) {
-		if (ofnode_device_is_compatible(node, "snps,dwc3"))
-			dwc3_node = node;
-	}
-
-	if (!ofnode_valid(dwc3_node)) {
-		pr_err("Can't find dwc3 subnode for %s\n", dev->name);
-		return -ENODEV;
-	}
-
-	/* retrieve the DWC3 dual role mode */
-	plat->mode = usb_get_dr_mode(dwc3_node);
-	if (plat->mode == USB_DR_MODE_UNKNOWN)
-		/* by default set dual role mode to HOST */
-		plat->mode = USB_DR_MODE_HOST;
-
-	return dm_scan_fdt_dev(dev);
-}
-
-static int sti_dwc3_glue_probe(struct udevice *dev)
-{
-	struct sti_dwc3_glue_plat *plat = dev_get_plat(dev);
-	int ret;
-
-	/* deassert both powerdown and softreset */
-	ret = reset_deassert(&plat->powerdown_ctl);
-	if (ret < 0) {
-		pr_err("DWC3 powerdown reset deassert failed: %d", ret);
-		return ret;
-	}
-
-	ret = reset_deassert(&plat->softreset_ctl);
-	if (ret < 0) {
-		pr_err("DWC3 soft reset deassert failed: %d", ret);
-		goto softreset_err;
-	}
-
-	ret = sti_dwc3_glue_drd_init(plat);
-	if (ret)
-		goto init_err;
-
-	sti_dwc3_glue_init(plat);
-
-	return 0;
-
-init_err:
-	ret = reset_assert(&plat->softreset_ctl);
-	if (ret < 0) {
-		pr_err("DWC3 soft reset deassert failed: %d", ret);
-		return ret;
-	}
-
-softreset_err:
-	ret = reset_assert(&plat->powerdown_ctl);
-	if (ret < 0)
-		pr_err("DWC3 powerdown reset deassert failed: %d", ret);
-
-	return ret;
-}
-
-static int sti_dwc3_glue_remove(struct udevice *dev)
-{
-	struct sti_dwc3_glue_plat *plat = dev_get_plat(dev);
-	int ret;
-
-	/* assert both powerdown and softreset */
-	ret = reset_assert(&plat->powerdown_ctl);
-	if (ret < 0) {
-		pr_err("DWC3 powerdown reset deassert failed: %d", ret);
-		return ret;
-	}
-
-	ret = reset_assert(&plat->softreset_ctl);
-	if (ret < 0)
-		pr_err("DWC3 soft reset deassert failed: %d", ret);
-
-	return ret;
-}
-
-static const struct udevice_id sti_dwc3_glue_ids[] = {
-	{ .compatible = "st,stih407-dwc3" },
-	{ }
-};
-
-U_BOOT_DRIVER(dwc3_sti_glue) = {
-	.name = "dwc3_sti_glue",
-	.id = UCLASS_NOP,
-	.of_match = sti_dwc3_glue_ids,
-	.of_to_plat = sti_dwc3_glue_of_to_plat,
-	.probe = sti_dwc3_glue_probe,
-	.remove = sti_dwc3_glue_remove,
-	.bind = sti_dwc3_glue_bind,
-	.plat_auto	= sizeof(struct sti_dwc3_glue_plat),
-	.flags = DM_FLAG_ALLOC_PRIV_DMA,
-};
diff --git a/include/dwc3-sti-glue.h b/include/dwc3-sti-glue.h
deleted file mode 100644
index 546ffbaf7b4..00000000000
--- a/include/dwc3-sti-glue.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
- * Author(s): Patrice Chotard, <patrice.chotard@foss.st.com> for STMicroelectronics.
- */
-
-#ifndef __DWC3_STI_UBOOT_H_
-#define __DWC3_STI_UBOOT_H_
-
-/* glue registers */
-#include <linux/bitops.h>
-#define CLKRST_CTRL		0x00
-#define AUX_CLK_EN		BIT(0)
-#define SW_PIPEW_RESET_N	BIT(4)
-#define EXT_CFG_RESET_N		BIT(8)
-
-#define XHCI_REVISION		BIT(12)
-
-#define USB2_VBUS_MNGMNT_SEL1	0x2C
-#define USB2_VBUS_UTMIOTG	0x1
-
-#define SEL_OVERRIDE_VBUSVALID(n)	((n) << 0)
-#define SEL_OVERRIDE_POWERPRESENT(n)	((n) << 4)
-#define SEL_OVERRIDE_BVALID(n)		((n) << 8)
-
-/* Static DRD configuration */
-#define USB3_CONTROL_MASK		0xf77
-
-#define USB3_DEVICE_NOT_HOST		BIT(0)
-#define USB3_FORCE_VBUSVALID		BIT(1)
-#define USB3_DELAY_VBUSVALID		BIT(2)
-#define USB3_SEL_FORCE_OPMODE		BIT(4)
-#define USB3_FORCE_OPMODE(n)		((n) << 5)
-#define USB3_SEL_FORCE_DPPULLDOWN2	BIT(8)
-#define USB3_FORCE_DPPULLDOWN2		BIT(9)
-#define USB3_SEL_FORCE_DMPULLDOWN2	BIT(10)
-#define USB3_FORCE_DMPULLDOWN2		BIT(11)
-
-int sti_dwc3_init(enum usb_dr_mode mode);
-
-#endif /* __DWC3_STI_UBOOT_H_ */