Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 940 insertions, 0 deletions

diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
new file mode 100644
index 000000000..8eab5f38b
--- /dev/null
+++ b/drivers/usb/dwc2/params.c
@@ -0,0 +1,940 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2004-2016 Synopsys, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/usb/of.h>
+
+#include "core.h"
+
+static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->host_rx_fifo_size = 774;
+	p->max_transfer_size = 65535;
+	p->max_packet_count = 511;
+	p->ahbcfg = 0x10;
+}
+
+static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_rx_fifo_size = 512;
+	p->host_nperio_tx_fifo_size = 512;
+	p->host_perio_tx_fifo_size = 512;
+	p->max_transfer_size = 65535;
+	p->max_packet_count = 511;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 8;
+	p->i2c_enable = false;
+	p->reload_ctl = false;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+	p->change_speed_quirk = true;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+}
+
+static void dwc2_set_jz4775_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 16;
+	p->activate_ingenic_overcurrent_detection =
+		!device_property_read_bool(hsotg->dev, "disable-over-current");
+}
+
+static void dwc2_set_x1600_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 16;
+	p->activate_ingenic_overcurrent_detection =
+		!device_property_read_bool(hsotg->dev, "disable-over-current");
+}
+
+static void dwc2_set_x2000_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_rx_fifo_size = 1024;
+	p->host_nperio_tx_fifo_size = 1024;
+	p->host_perio_tx_fifo_size = 1024;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 16;
+	p->activate_ingenic_overcurrent_detection =
+		!device_property_read_bool(hsotg->dev, "disable-over-current");
+}
+
+static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+	p->no_clock_gating = true;
+	p->phy_utmi_width = 8;
+}
+
+static void dwc2_set_socfpga_agilex_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+	p->no_clock_gating = true;
+}
+
+static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->host_rx_fifo_size = 525;
+	p->host_nperio_tx_fifo_size = 128;
+	p->host_perio_tx_fifo_size = 256;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+}
+
+static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->host_rx_fifo_size = 288;
+	p->host_nperio_tx_fifo_size = 128;
+	p->host_perio_tx_fifo_size = 96;
+	p->max_transfer_size = 65535;
+	p->max_packet_count = 511;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+}
+
+static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_rx_fifo_size = 512;
+	p->host_nperio_tx_fifo_size = 500;
+	p->host_perio_tx_fifo_size = 500;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+}
+
+static void dwc2_set_amlogic_g12a_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->lpm = false;
+	p->lpm_clock_gating = false;
+	p->besl = false;
+	p->hird_threshold_en = false;
+}
+
+static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
+}
+
+static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->speed = DWC2_SPEED_PARAM_FULL;
+	p->host_rx_fifo_size = 128;
+	p->host_nperio_tx_fifo_size = 96;
+	p->host_perio_tx_fifo_size = 96;
+	p->max_packet_count = 256;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
+	p->i2c_enable = false;
+	p->activate_stm_fs_transceiver = true;
+}
+
+static void dwc2_set_stm32f7_hsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->host_rx_fifo_size = 622;
+	p->host_nperio_tx_fifo_size = 128;
+	p->host_perio_tx_fifo_size = 256;
+}
+
+static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->otg_caps.otg_rev = 0x200;
+	p->speed = DWC2_SPEED_PARAM_FULL;
+	p->host_rx_fifo_size = 128;
+	p->host_nperio_tx_fifo_size = 96;
+	p->host_perio_tx_fifo_size = 96;
+	p->max_packet_count = 256;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
+	p->i2c_enable = false;
+	p->activate_stm_fs_transceiver = true;
+	p->activate_stm_id_vb_detection = true;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+	p->host_support_fs_ls_low_power = true;
+	p->host_ls_low_power_phy_clk = true;
+}
+
+static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->otg_caps.srp_support = false;
+	p->otg_caps.otg_rev = 0x200;
+	p->activate_stm_id_vb_detection = !device_property_read_bool(hsotg->dev, "usb-role-switch");
+	p->host_rx_fifo_size = 440;
+	p->host_nperio_tx_fifo_size = 256;
+	p->host_perio_tx_fifo_size = 256;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
+	p->lpm = false;
+	p->lpm_clock_gating = false;
+	p->besl = false;
+	p->hird_threshold_en = false;
+}
+
+const struct of_device_id dwc2_of_match_table[] = {
+	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
+	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
+	{ .compatible = "ingenic,jz4775-otg", .data = dwc2_set_jz4775_params },
+	{ .compatible = "ingenic,jz4780-otg", .data = dwc2_set_jz4775_params },
+	{ .compatible = "ingenic,x1000-otg", .data = dwc2_set_jz4775_params },
+	{ .compatible = "ingenic,x1600-otg", .data = dwc2_set_x1600_params },
+	{ .compatible = "ingenic,x1700-otg", .data = dwc2_set_x1600_params },
+	{ .compatible = "ingenic,x1830-otg", .data = dwc2_set_x1600_params },
+	{ .compatible = "ingenic,x2000-otg", .data = dwc2_set_x2000_params },
+	{ .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
+	{ .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
+	{ .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
+	{ .compatible = "snps,dwc2" },
+	{ .compatible = "samsung,s3c6400-hsotg",
+	  .data = dwc2_set_s3c6400_params },
+	{ .compatible = "amlogic,meson8-usb",
+	  .data = dwc2_set_amlogic_params },
+	{ .compatible = "amlogic,meson8b-usb",
+	  .data = dwc2_set_amlogic_params },
+	{ .compatible = "amlogic,meson-gxbb-usb",
+	  .data = dwc2_set_amlogic_params },
+	{ .compatible = "amlogic,meson-g12a-usb",
+	  .data = dwc2_set_amlogic_g12a_params },
+	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
+	{ .compatible = "apm,apm82181-dwc-otg", .data = dwc2_set_amcc_params },
+	{ .compatible = "st,stm32f4x9-fsotg",
+	  .data = dwc2_set_stm32f4x9_fsotg_params },
+	{ .compatible = "st,stm32f4x9-hsotg" },
+	{ .compatible = "st,stm32f7-hsotg",
+	  .data = dwc2_set_stm32f7_hsotg_params },
+	{ .compatible = "st,stm32mp15-fsotg",
+	  .data = dwc2_set_stm32mp15_fsotg_params },
+	{ .compatible = "st,stm32mp15-hsotg",
+	  .data = dwc2_set_stm32mp15_hsotg_params },
+	{ .compatible = "intel,socfpga-agilex-hsotg",
+	  .data = dwc2_set_socfpga_agilex_params },
+	{},
+};
+MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
+
+const struct acpi_device_id dwc2_acpi_match[] = {
+	{ "BCM2848", (kernel_ulong_t)dwc2_set_bcm_params },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, dwc2_acpi_match);
+
+static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
+{
+	switch (hsotg->hw_params.op_mode) {
+	case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+		hsotg->params.otg_caps.hnp_support = true;
+		hsotg->params.otg_caps.srp_support = true;
+		break;
+	case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+	case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+	case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+		hsotg->params.otg_caps.hnp_support = false;
+		hsotg->params.otg_caps.srp_support = true;
+		break;
+	default:
+		hsotg->params.otg_caps.hnp_support = false;
+		hsotg->params.otg_caps.srp_support = false;
+		break;
+	}
+}
+
+static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
+{
+	int val;
+	u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
+
+	val = DWC2_PHY_TYPE_PARAM_FS;
+	if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
+		if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
+		    hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
+			val = DWC2_PHY_TYPE_PARAM_UTMI;
+		else
+			val = DWC2_PHY_TYPE_PARAM_ULPI;
+	}
+
+	if (dwc2_is_fs_iot(hsotg))
+		hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
+
+	hsotg->params.phy_type = val;
+}
+
+static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
+{
+	int val;
+
+	val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
+		DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
+
+	if (dwc2_is_fs_iot(hsotg))
+		val = DWC2_SPEED_PARAM_FULL;
+
+	if (dwc2_is_hs_iot(hsotg))
+		val = DWC2_SPEED_PARAM_HIGH;
+
+	hsotg->params.speed = val;
+}
+
+static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
+{
+	int val;
+
+	val = (hsotg->hw_params.utmi_phy_data_width ==
+	       GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
+
+	if (hsotg->phy) {
+		/*
+		 * If using the generic PHY framework, check if the PHY bus
+		 * width is 8-bit and set the phyif appropriately.
+		 */
+		if (phy_get_bus_width(hsotg->phy) == 8)
+			val = 8;
+	}
+
+	hsotg->params.phy_utmi_width = val;
+}
+
+static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+	int depth_average;
+	int fifo_count;
+	int i;
+
+	fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
+
+	memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
+	depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
+	for (i = 1; i <= fifo_count; i++)
+		p->g_tx_fifo_size[i] = depth_average;
+}
+
+static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
+{
+	int val;
+
+	if (hsotg->hw_params.hibernation)
+		val = DWC2_POWER_DOWN_PARAM_HIBERNATION;
+	else if (hsotg->hw_params.power_optimized)
+		val = DWC2_POWER_DOWN_PARAM_PARTIAL;
+	else
+		val = DWC2_POWER_DOWN_PARAM_NONE;
+
+	hsotg->params.power_down = val;
+}
+
+static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->lpm = hsotg->hw_params.lpm_mode;
+	if (p->lpm) {
+		p->lpm_clock_gating = true;
+		p->besl = true;
+		p->hird_threshold_en = true;
+		p->hird_threshold = 4;
+	} else {
+		p->lpm_clock_gating = false;
+		p->besl = false;
+		p->hird_threshold_en = false;
+	}
+}
+
+/**
+ * dwc2_set_default_params() - Set all core parameters to their
+ * auto-detected default values.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ *
+ */
+static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+	struct dwc2_core_params *p = &hsotg->params;
+	bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
+
+	dwc2_set_param_otg_cap(hsotg);
+	dwc2_set_param_phy_type(hsotg);
+	dwc2_set_param_speed(hsotg);
+	dwc2_set_param_phy_utmi_width(hsotg);
+	dwc2_set_param_power_down(hsotg);
+	dwc2_set_param_lpm(hsotg);
+	p->phy_ulpi_ddr = false;
+	p->phy_ulpi_ext_vbus = false;
+
+	p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
+	p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
+	p->i2c_enable = hw->i2c_enable;
+	p->acg_enable = hw->acg_enable;
+	p->ulpi_fs_ls = false;
+	p->ts_dline = false;
+	p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
+	p->uframe_sched = true;
+	p->external_id_pin_ctl = false;
+	p->ipg_isoc_en = false;
+	p->service_interval = false;
+	p->max_packet_count = hw->max_packet_count;
+	p->max_transfer_size = hw->max_transfer_size;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
+	p->ref_clk_per = 33333;
+	p->sof_cnt_wkup_alert = 100;
+
+	if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		p->host_dma = dma_capable;
+		p->dma_desc_enable = false;
+		p->dma_desc_fs_enable = false;
+		p->host_support_fs_ls_low_power = false;
+		p->host_ls_low_power_phy_clk = false;
+		p->host_channels = hw->host_channels;
+		p->host_rx_fifo_size = hw->rx_fifo_size;
+		p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
+		p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
+	}
+
+	if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		p->g_dma = dma_capable;
+		p->g_dma_desc = hw->dma_desc_enable;
+
+		/*
+		 * The values for g_rx_fifo_size (2048) and
+		 * g_np_tx_fifo_size (1024) come from the legacy s3c
+		 * gadget driver. These defaults have been hard-coded
+		 * for some time so many platforms depend on these
+		 * values. Leave them as defaults for now and only
+		 * auto-detect if the hardware does not support the
+		 * default.
+		 */
+		p->g_rx_fifo_size = 2048;
+		p->g_np_tx_fifo_size = 1024;
+		dwc2_set_param_tx_fifo_sizes(hsotg);
+	}
+}
+
+/**
+ * dwc2_get_device_properties() - Read in device properties.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ *
+ * Read in the device properties and adjust core parameters if needed.
+ */
+static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+	int num;
+
+	if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
+					 &p->g_rx_fifo_size);
+
+		device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
+					 &p->g_np_tx_fifo_size);
+
+		num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
+		if (num > 0) {
+			num = min(num, 15);
+			memset(p->g_tx_fifo_size, 0,
+			       sizeof(p->g_tx_fifo_size));
+			device_property_read_u32_array(hsotg->dev,
+						       "g-tx-fifo-size",
+						       &p->g_tx_fifo_size[1],
+						       num);
+		}
+
+		of_usb_update_otg_caps(hsotg->dev->of_node, &p->otg_caps);
+	}
+
+	if (of_find_property(hsotg->dev->of_node, "disable-over-current", NULL))
+		p->oc_disable = true;
+}
+
+static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
+{
+	int valid = 1;
+
+	if (hsotg->params.otg_caps.hnp_support && hsotg->params.otg_caps.srp_support) {
+		/* check HNP && SRP capable */
+		if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
+			valid = 0;
+	} else if (!hsotg->params.otg_caps.hnp_support) {
+		/* check SRP only capable */
+		if (hsotg->params.otg_caps.srp_support) {
+			switch (hsotg->hw_params.op_mode) {
+			case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+			case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+			case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+			case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+				break;
+			default:
+				valid = 0;
+				break;
+			}
+		}
+		/* else: NO HNP && NO SRP capable: always valid */
+	} else {
+		valid = 0;
+	}
+
+	if (!valid)
+		dwc2_set_param_otg_cap(hsotg);
+}
+
+static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
+{
+	int valid = 0;
+	u32 hs_phy_type;
+	u32 fs_phy_type;
+
+	hs_phy_type = hsotg->hw_params.hs_phy_type;
+	fs_phy_type = hsotg->hw_params.fs_phy_type;
+
+	switch (hsotg->params.phy_type) {
+	case DWC2_PHY_TYPE_PARAM_FS:
+		if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
+			valid = 1;
+		break;
+	case DWC2_PHY_TYPE_PARAM_UTMI:
+		if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
+		    (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
+			valid = 1;
+		break;
+	case DWC2_PHY_TYPE_PARAM_ULPI:
+		if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
+		    (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
+			valid = 1;
+		break;
+	default:
+		break;
+	}
+
+	if (!valid)
+		dwc2_set_param_phy_type(hsotg);
+}
+
+static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
+{
+	int valid = 1;
+	int phy_type = hsotg->params.phy_type;
+	int speed = hsotg->params.speed;
+
+	switch (speed) {
+	case DWC2_SPEED_PARAM_HIGH:
+		if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
+		    (phy_type == DWC2_PHY_TYPE_PARAM_FS))
+			valid = 0;
+		break;
+	case DWC2_SPEED_PARAM_FULL:
+	case DWC2_SPEED_PARAM_LOW:
+		break;
+	default:
+		valid = 0;
+		break;
+	}
+
+	if (!valid)
+		dwc2_set_param_speed(hsotg);
+}
+
+static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
+{
+	int valid = 0;
+	int param = hsotg->params.phy_utmi_width;
+	int width = hsotg->hw_params.utmi_phy_data_width;
+
+	switch (width) {
+	case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
+		valid = (param == 8);
+		break;
+	case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
+		valid = (param == 16);
+		break;
+	case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
+		valid = (param == 8 || param == 16);
+		break;
+	}
+
+	if (!valid)
+		dwc2_set_param_phy_utmi_width(hsotg);
+}
+
+static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
+{
+	int param = hsotg->params.power_down;
+
+	switch (param) {
+	case DWC2_POWER_DOWN_PARAM_NONE:
+		break;
+	case DWC2_POWER_DOWN_PARAM_PARTIAL:
+		if (hsotg->hw_params.power_optimized)
+			break;
+		dev_dbg(hsotg->dev,
+			"Partial power down isn't supported by HW\n");
+		param = DWC2_POWER_DOWN_PARAM_NONE;
+		break;
+	case DWC2_POWER_DOWN_PARAM_HIBERNATION:
+		if (hsotg->hw_params.hibernation)
+			break;
+		dev_dbg(hsotg->dev,
+			"Hibernation isn't supported by HW\n");
+		param = DWC2_POWER_DOWN_PARAM_NONE;
+		break;
+	default:
+		dev_err(hsotg->dev,
+			"%s: Invalid parameter power_down=%d\n",
+			__func__, param);
+		param = DWC2_POWER_DOWN_PARAM_NONE;
+		break;
+	}
+
+	hsotg->params.power_down = param;
+}
+
+static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
+{
+	int fifo_count;
+	int fifo;
+	int min;
+	u32 total = 0;
+	u32 dptxfszn;
+
+	fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
+	min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
+
+	for (fifo = 1; fifo <= fifo_count; fifo++)
+		total += hsotg->params.g_tx_fifo_size[fifo];
+
+	if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
+		dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
+			 __func__);
+		dwc2_set_param_tx_fifo_sizes(hsotg);
+	}
+
+	for (fifo = 1; fifo <= fifo_count; fifo++) {
+		dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
+
+		if (hsotg->params.g_tx_fifo_size[fifo] < min ||
+		    hsotg->params.g_tx_fifo_size[fifo] >  dptxfszn) {
+			dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
+				 __func__, fifo,
+				 hsotg->params.g_tx_fifo_size[fifo]);
+			hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
+		}
+	}
+}
+
+#define CHECK_RANGE(_param, _min, _max, _def) do {			\
+		if ((int)(hsotg->params._param) < (_min) ||		\
+		    (hsotg->params._param) > (_max)) {			\
+			dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
+				 __func__, #_param, hsotg->params._param); \
+			hsotg->params._param = (_def);			\
+		}							\
+	} while (0)
+
+#define CHECK_BOOL(_param, _check) do {					\
+		if (hsotg->params._param && !(_check)) {		\
+			dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
+				 __func__, #_param, hsotg->params._param); \
+			hsotg->params._param = false;			\
+		}							\
+	} while (0)
+
+static void dwc2_check_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+	struct dwc2_core_params *p = &hsotg->params;
+	bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
+
+	dwc2_check_param_otg_cap(hsotg);
+	dwc2_check_param_phy_type(hsotg);
+	dwc2_check_param_speed(hsotg);
+	dwc2_check_param_phy_utmi_width(hsotg);
+	dwc2_check_param_power_down(hsotg);
+	CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
+	CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
+	CHECK_BOOL(i2c_enable, hw->i2c_enable);
+	CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
+	CHECK_BOOL(acg_enable, hw->acg_enable);
+	CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
+	CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
+	CHECK_BOOL(lpm, hw->lpm_mode);
+	CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
+	CHECK_BOOL(besl, hsotg->params.lpm);
+	CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
+	CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
+	CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
+	CHECK_BOOL(service_interval, hw->service_interval_mode);
+	CHECK_RANGE(max_packet_count,
+		    15, hw->max_packet_count,
+		    hw->max_packet_count);
+	CHECK_RANGE(max_transfer_size,
+		    2047, hw->max_transfer_size,
+		    hw->max_transfer_size);
+
+	if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		CHECK_BOOL(host_dma, dma_capable);
+		CHECK_BOOL(dma_desc_enable, p->host_dma);
+		CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
+		CHECK_BOOL(host_ls_low_power_phy_clk,
+			   p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
+		CHECK_RANGE(host_channels,
+			    1, hw->host_channels,
+			    hw->host_channels);
+		CHECK_RANGE(host_rx_fifo_size,
+			    16, hw->rx_fifo_size,
+			    hw->rx_fifo_size);
+		CHECK_RANGE(host_nperio_tx_fifo_size,
+			    16, hw->host_nperio_tx_fifo_size,
+			    hw->host_nperio_tx_fifo_size);
+		CHECK_RANGE(host_perio_tx_fifo_size,
+			    16, hw->host_perio_tx_fifo_size,
+			    hw->host_perio_tx_fifo_size);
+	}
+
+	if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		CHECK_BOOL(g_dma, dma_capable);
+		CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
+		CHECK_RANGE(g_rx_fifo_size,
+			    16, hw->rx_fifo_size,
+			    hw->rx_fifo_size);
+		CHECK_RANGE(g_np_tx_fifo_size,
+			    16, hw->dev_nperio_tx_fifo_size,
+			    hw->dev_nperio_tx_fifo_size);
+		dwc2_check_param_tx_fifo_sizes(hsotg);
+	}
+}
+
+/*
+ * Gets host hardware parameters. Forces host mode if not currently in
+ * host mode. Should be called immediately after a core soft reset in
+ * order to get the reset values.
+ */
+static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+	u32 gnptxfsiz;
+	u32 hptxfsiz;
+
+	if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
+		return;
+
+	dwc2_force_mode(hsotg, true);
+
+	gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
+	hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
+
+	hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
+				       FIFOSIZE_DEPTH_SHIFT;
+	hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
+				      FIFOSIZE_DEPTH_SHIFT;
+}
+
+/*
+ * Gets device hardware parameters. Forces device mode if not
+ * currently in device mode. Should be called immediately after a core
+ * soft reset in order to get the reset values.
+ */
+static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+	u32 gnptxfsiz;
+	int fifo, fifo_count;
+
+	if (hsotg->dr_mode == USB_DR_MODE_HOST)
+		return;
+
+	dwc2_force_mode(hsotg, false);
+
+	gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
+
+	fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
+
+	for (fifo = 1; fifo <= fifo_count; fifo++) {
+		hw->g_tx_fifo_size[fifo] =
+			(dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
+			 FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
+	}
+
+	hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
+				       FIFOSIZE_DEPTH_SHIFT;
+}
+
+/**
+ * dwc2_get_hwparams() - During device initialization, read various hardware
+ *                       configuration registers and interpret the contents.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ *
+ */
+int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+	unsigned int width;
+	u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
+	u32 grxfsiz;
+
+	hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
+	hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
+	hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
+	hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
+	grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
+
+	/* hwcfg1 */
+	hw->dev_ep_dirs = hwcfg1;
+
+	/* hwcfg2 */
+	hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
+		      GHWCFG2_OP_MODE_SHIFT;
+	hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
+		   GHWCFG2_ARCHITECTURE_SHIFT;
+	hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
+	hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
+				GHWCFG2_NUM_HOST_CHAN_SHIFT);
+	hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
+			  GHWCFG2_HS_PHY_TYPE_SHIFT;
+	hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
+			  GHWCFG2_FS_PHY_TYPE_SHIFT;
+	hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
+			 GHWCFG2_NUM_DEV_EP_SHIFT;
+	hw->nperio_tx_q_depth =
+		(hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
+		GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
+	hw->host_perio_tx_q_depth =
+		(hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
+		GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
+	hw->dev_token_q_depth =
+		(hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
+		GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
+
+	/* hwcfg3 */
+	width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
+		GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
+	hw->max_transfer_size = (1 << (width + 11)) - 1;
+	width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
+		GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
+	hw->max_packet_count = (1 << (width + 4)) - 1;
+	hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
+	hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
+			      GHWCFG3_DFIFO_DEPTH_SHIFT;
+	hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
+
+	/* hwcfg4 */
+	hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
+	hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
+				  GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
+	hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
+			     GHWCFG4_NUM_IN_EPS_SHIFT;
+	hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
+	hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
+	hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
+	hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
+				  GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
+	hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
+	hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
+	hw->service_interval_mode = !!(hwcfg4 &
+				       GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
+
+	/* fifo sizes */
+	hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
+				GRXFSIZ_DEPTH_SHIFT;
+	/*
+	 * Host specific hardware parameters. Reading these parameters
+	 * requires the controller to be in host mode. The mode will
+	 * be forced, if necessary, to read these values.
+	 */
+	dwc2_get_host_hwparams(hsotg);
+	dwc2_get_dev_hwparams(hsotg);
+
+	return 0;
+}
+
+typedef void (*set_params_cb)(struct dwc2_hsotg *data);
+
+int dwc2_init_params(struct dwc2_hsotg *hsotg)
+{
+	const struct of_device_id *match;
+	set_params_cb set_params;
+
+	dwc2_set_default_params(hsotg);
+	dwc2_get_device_properties(hsotg);
+
+	match = of_match_device(dwc2_of_match_table, hsotg->dev);
+	if (match && match->data) {
+		set_params = match->data;
+		set_params(hsotg);
+	} else {
+		const struct acpi_device_id *amatch;
+
+		amatch = acpi_match_device(dwc2_acpi_match, hsotg->dev);
+		if (amatch && amatch->driver_data) {
+			set_params = (set_params_cb)amatch->driver_data;
+			set_params(hsotg);
+		}
+	}
+
+	dwc2_check_params(hsotg);
+
+	return 0;
+}